Plough for ploughing plants and ploughing plant for inclined stratum

FIELD: process engineering.

SUBSTANCE: invention relates to mining, particularly to coal of minerals ploughing at inclined strata, particularly, of steep deposits. Ploughing plant comprises plough, at least on pull chain to displace plough over coal work face and guide mechanism arranged along coal work face by means of sliding guide runners. Said plough has split ploughing body with two main elements. Ploughing body main element is provided with retainer for separate pull chain and one or several guide sliding runners. Guide mechanism has two guide plates spaced apart by, in fact, identical distance to coal work face over which plough body is driven with help of their guide sliding runners.

EFFECT: working of coal seams with higher safety.

30 cl, 11 dwg

 

2420-180048RU/018

STRUG FOR plows AND PLOW TO the INCLINED FORMATION

DESCRIPTION

The present invention relates to the plow and strugovym installations for the extraction of coal or minerals in inclined formation, in particular for the development of coal seams in steep formation, having a locking mechanism for fixing at least one traction means for moving the plow and having at least one guiding means to guide the plane over the guide mechanism of the plow. The present invention also relates to a plow setup for mining in inclined formation, in particular for the development of coal seams in steep formation, having a plane of at least one traction means for moving the plow in the coal mine, and the guide mechanism, which is placed or can be placed along the coal face, and in which the plow is forced into and through the guide means.

Over the last two decades, automatic mechanization of horizontal layered coal seams with a dip angle of 0-20 gon and deposits with flat embedding of the angle of incidence 20-40 gon brought the extraction capacity of up to 1500 t/h using planes to plow installations and more than 2500 t/h with use�ing to the shearers. Today the volume of coal mined by underground method is over 90% for deposits with a horizontal and flat embedding, because with the use of available technologies, mining operations, they may be developed considerably more economical than coal seams or other strata minerals in siliconalley formation with a slope of more than 40 gun, or in steeply dipping formations with angle 60-100 gon.

For coal mining in inclined formation, particularly in steeply dipping formations, most recently was used mainly plow installation with base plate or plow installation with gantry support and DE 3245515 C2 describes as an example plow installation for the development of steeply dipping layered coal seams with a dip angle of 60°. In the plow installation with base plate for steeply dipping formations guide mechanism consists of a channel for the chain, made approximately C-shaped form in which the base plate of the plow is hooked to the sending unit.

The aim of the present invention is to provide a plow and plow, with which the mining field, in particular, coal seams, including the steeply inclined strata and, in particular, the seams in steep formation, can be developed economically and with high�epent safety.

This object is achieved according to the present invention in relation to a plane by using the fact that the plane has a detachable ploughing equipment by a housing having two main elements of the plow body, each main element of the plow body is provided with a locking mechanism for a separate traction means for moving the coal plow through at least two traction means, in addition, with the help of guide means for directing a coal plow for at least two mutually spaced guide mechanisms. Consequently, the plow, according to the present invention, is moved parallel to the coal face through not only one traction means, as is usually the case in the prior art, and by means of two traction means. At the same time, each of the two main elements of the plow body is directed through the guide means by a separate guide mechanism, thereby generally achieving uniform direction detachable plow body. As a result the possibility of separation of the plow body, and separability preferably provided in accordance with the present invention can be a relatively simple way by converting plow body, as will be more fully explained further below, the relevant�but to adapt to a different working height for to reuse the same elements for the development of mining deposits, particularly coal seams of varying thickness, to increase the efficiency of the plow according to the present invention.

For the development of mineral deposits of different working height with the help of the plow in accordance with the present invention is particularly preferred if the basic elements of the plow body can join directly to each other through fastening means for the formation of a plow body having initial working height. Moreover, the connection of the two main elements of the plow body by attachment means for the formation of a fairly stable plow body greatly facilitates groundwater input and output movement of the plow body and, in particular, assembling in steeply dipping deposits, because the weight of the plow body is reduced at least by half through the separation of the two major elements of the plow body. In order to increase the efficiency of Struga, in addition, preferably, provided at least one intermediate element plow body, which can be attached to the two main elements of the plow body by attachment means for education to plow�of Cusa, having working height, which is more than the working height of the plow body that consists of bonded together key elements of the plow body. Due to the choice of different intermediate elements plow body, or by connecting together a plurality of respectively identical to the intermediate elements are made plow body, such an arrangement of the plow plow allows the body to gradually set to different working heights, and, thus, to different thicknesses of mineral deposits to be developed. It is advisable that each main element of the plow body, and, if available, each intermediate element plow body, has a locking means for the fastening means with the cooperation of the attachment means and the locking means can be performed essentially hard ploughing equipment by housing consisting of two main elements plow body, or a combination of both, the two main elements of the plow body with at least one intermediate element of the plow body. Since the intermediate elements of the plow body mounted between the main elements of the plow body, although the guide mechanism and should be adapted, bearing or direction of the plane is always carried out on both outside�them. Could also be many intermediate elements of the plow body, in this case, the intermediate elements of the plow body connected with the possibility of disconnection or configured to releasably attach to each other, and the main elements of the plow body connected with the possibility of disconnection or made with the possibility of joining the intermediate elements of the plow body by means of such fastening means under the ground were provided with only one type of attachment means for the design of Struga different structural height and produce only one type of attachment means.

In a particularly preferred embodiment, the implementation of the plow according to the present invention the fastening means comprise U-shaped clips which can be clamped using the clamping screws around the top and bottom sides on the main elements of the plow body or the intermediate elements of the plow body and, in the assembled block dividing plane between them, i.e. between the elements that need to be connected to each other. In a particularly preferred embodiment, the implementation of the respective clamps, the clamps have clamping projections having a wedge-shaped mutually facing each other clamping surface, and the locking deterge�VA is provided with a wedge-shaped bevels for interaction with the clamping surfaces. When clamping a pair of U-shaped clamps each other, the elements of the plow body, which therefore must be connected to each other may be bonded to each other with the clamping surfaces and a wedge-shaped bevel perpendicular to the separation plane with sufficient retention efforts and, for this purpose, sufficient for a corresponding reduction in the distance between the clamps. In a particularly preferred embodiment of the fastening means may comprise a pair of clamps, the distance between which can be changed using the set screw, the shank of which in the assembled state is located in the dividing plane between the elements of the plow body, which must be connected. This mutual connection of the two elements of the plow body may be provided not only a convenient way to access on the upper sides and/or bottom sides of the plow body, but also makes possible, even in the case of abrasion, to ensure the fastening of the fastening means with sufficient force and, accordingly, the fastening together of the two elements that must be linked.

The plow according to the present invention preferably consists, respectively, of the main elements of the plow body, which have the outer side, on which is placed the corresponding eg�Claudie funds interacting with guide mechanisms, and the inner side of which forms the dividing plane, and which can be attached to another main element of the plow body or the intermediate element of the plow body. In a particularly preferred embodiment of the ploughing equipment by housing has on each of its two outer sides a pair of guide means, namely, a front guiding means and rear guiding means and the guide means are disposed on opposite external sides, should be placed in pairs opposite one another. The result is a uniform distribution of the four guide means, namely the two front guide means and two rear guide means along the plow body on the outside, even if the load on ploughing equipment by housing must change, can be achieved suitable support Struga on the guide mechanism, in particular, the preferred three-point bearing or a three-point plow installation of the housing. Compared to principle areas, known from the prior art, for example, the direction of the gantry or the direction of the base plate plane, not only retains low torques that are generated by your effort, but it also ensures�AET, however, ploughing equipment by the body as a whole, which can be made narrower, less energy-intensive and thus less heavy in execution, which again leads to less expensive design of the plow and to improved characteristics when used in the work. In accordance with a particularly preferred variant implementation, guide means on each outer side consist of moving runners that are attached to the main elements of the plow body is movable, in particular rotatably around a support bearing or swivel pin. Front and rear guide means can then be mutually aligned for the protection of Struga from jamming, even as a result of the action of variable forces opposite to the moving plane. In addition, preferably, if the basic elements of the plow bodies are on the outside of elongation, which continues to the back, in the form of elongation of the main plow element of the housing for dividing plane, or connecting area of the basic element of the plow body on the inner side, and the rear, in the direction of movement of the two guides of each basic element of the plow body is attached to the elongation of preferably so that it would�about movable rotatably. In addition, the locking mechanism for the respective traction means then can also be performed at this elongation for achieving not only a suitable force transmission, but also plow compact design of the housing.

In order to further improve the way the plow when used in operation, each main element of the plow body may be provided with a mounting lug for driving element for minerals. Such a drive element, if required, can be installed on one side to at idle to section recesses, for transportation of minerals in the pan down, separate fragments of rocks or fragments of minerals or the like, despite the steep angle of incidence, must salinewater or prihvatyvaya in the pan. The installation ledge can be placed in particular on the bottom side of the main plow element of the housing, preferably approximately midway between the two reference points to guide tools, and/or may lie near the locking mechanism for a traction vehicle.

For mining, such as, for example, coal seams, with the help of the plow in accordance with the present invention, the plow, in the method, which is essentially known, shall be fitted with a cutting tool�Ohm, in particular, strahovymi cutters. For this purpose, at each primary element of the plow body and, if available, at each intermediate element plow corps, respectively arranged in at least one holding device for removable attachment plow cutters and/or a removable attachment of the tool bar for plow cutters. Plow cutters and tool bar for plow cutters are usually placed on the front side of the plow body. To improve the performance of the plow in accordance with the present invention and to better align with the prescribed loads when conducting mountain works, plow cutters on the inner sides of the main elements of the plow body and/or plow cutters on the intermediate elements of the plow body can be set back relative to strugovym the cutters on or near the outer sides of the main elements of the plow body. Particularly preferred is the location of the plow cutters on the front side, and the arrangement, distributed over the entire height of the plow body, is approximately W-shape.

In the development of coal seams in steep formation process of the recesses of Struga, unlike coal seams in horizontal formation, implementation�is by reversing mining Struga, more specifically, coal production takes place exclusively when moving upward opposite to the direction of the fall from the conveyor belt or the output section of the underground mining system to the head section in which, in particular, also posted actuators for a plane. Backward plane back to the output section is carried out as idling without the mining operation and during idling the plane is moved back to the initial position near the output section. Coal, astrogeny from bottom to top in sewage treatment canal can be removed without mechanically managed pipeline using the drain gutter because, because of the slope about 25 Ghosn, is sufficient inclination of the discharge chute or guide channel, which causes the excavated material to slide down automatically to the output section. To ensure idling without wear, particularly preferably, if each primary element of the plow body is provided with a rotary plow holder of cutters to accommodate the plow cutters or strap with strahovymi cutters, all plow cutters, related to the main plow element of the housing, preferably fixed or made with the possibility of fixation on swivel mount plow cutters. As a result rotatably holders plow Rasco� plow cutters, during idling, can be rotated essentially automatically in a position in which not only plow cutting edges of the cutters do not come into contact with the material to be prey, but also, in this case, the entire width of the plow body is less than in a mine passage to develop the Deposit, in principle, did not resist when idle.

The above object is achieved in the plow installation according to the present invention in that the plane has a detachable ploughing equipment by a housing having two main elements of the plow body, each main element of the plow body is provided with a locking mechanism for a separate traction means and the guide means, and, in addition, the guide mechanism plow having two guide rails, which are placed at a distance from each other and essentially at the same distance from the coal face, and ploughing equipment by which the body is forced into and through guide means. The plane, which is preferably suitable for use in the plow installation, in accordance with the present invention, is ploughing equipment by housing having a structure, in addition, as described above. The location of guide mechanisms essentially parallel to and at equal distance from the coal face to ensure�AET-free torque plow support housing, because, unlike a plane of the base plate, is not unilateral, but rather a bilateral reliance plow body. Each main element of the plow body can have, in particular, the front and rear guides, with front and rear guide means movably attached rotatably to each major element of the plow body, and at least a rear guide means, in assembled form, interacting with the guide rails by means of a movable action for ploughing equipment by building, when used at work, took a three-point support through three of the four guide means. Guide mechanism for a plow according to the present invention for the development of steeply dipping stratified deposits can have, in particular, around a corner or L-shaped pan, the lower guide bar attached to the first section, located on the grounds of slaughter, and the upper guide bar is attached via the console lever to the second section of the pan, angled from the lower section. In this embodiment, the implementation of the pan may at the same time also to form a chute for the removal of material extracted using a plane.

Additional advantages and options OS�enjoyment of the plow according to the present invention and plow according to the present invention follow from the subsequent description of a preferred illustrative embodiment, plow and coal Struga.

Fig.1 depicts a perspective view of a part of the plow according to the present invention, with the plow, according to the present invention;

Fig.2 depicts a side view of the plow of Fig.1, the upper side of the plane with the top side facing to the working face;

Fig.3 depicts a plane, according to Fig.1, in the side view of the plow;

Fig.4 depicts a top view of one of the main elements of the plow of the plow body, with a partially open cross-section;

Fig.5 depicts a view in section along V-V in Fig.4;

Fig.6 depicts a view in section along VI-VI shown in Fig.4, with a partially open cross-section;

Fig.7 depicts in detail the fastening elements on the form in section along a dividing plane between the main element of the plow body and the intermediate element;

Fig.8 depicts a detailed perspective view of the guide Shoe according to the present invention;

Fig.9 depicts a top view of the plane, according to the second illustrative embodiment of the;

Fig.10 depicts a plane shown in Fig.9, in top view; and

Fig.11 depicts a plane shown in Fig.9, consisting of the main elements of the plow body, in the front view.

Fig.1 and 2, the plow for coal mining underground steeply dipping layered coal p�ASTA with an angle of fall, for example, more than 45 Ghosn indicated in General by the reference position 1. Plow 1 is hosted in steeply dipping layered field parallel to the coal face, therefore, at an angle to the horizontal, and consists of a variety of direct 2 pans, constructed identically to each other, and containing, among other things, a corner of the pan 3, for which, in the drawing, the lower portion 4 remains on the soil of the bottom, while plot 5, oriented approximately perpendicular to it, runs approximately parallel to the working face. On angled rear sides of the sections 5 pan 3 has an upper tubular guide 6A and the lower tubular guides 6B, here, placed one above the other, through the space which can be no-load branch circuits Struga, shown only with the respective drive branch. Using the grippers, for example, on the rear side sections 5 pan 3, all plow 1 can be moved by a shifting device (not further shown), in accordance with the performance of work in a coal mine. Since the present application, as such, does not belong to the execution stops to plow, nor to shift the devices, they are not shown.

Respectively, to the lower section 4 of the pan 3 is attached near the anterior end lying IMM�dstone related with the coal face, the lower guide bar 7A, which, when used in the work runs parallel to the coal face and the plane, designated as a whole by the reference position 10, is directed through the lower guide means, as will be explained below. Each straight pan 2, respectively, has an element 7A of the lower guide rail and the guide rail elements 7A related direct 2 pans can be cross hold or be deadlocked accordingly. The lower guide bars 7A are preferably screwed, cast or welded to the lower section 4.

In the shown illustrative embodiment, the implementation, at the upper end of the segment 5 is screwed almost rectangular holders 8, to which are welded two supporting levers 9, respectively, so that they protrude forward in the direction of the working face, thus supporting the levers form the supporting elements for the upper guide rail 7B as an upper guide mechanism for a plane 10. The upper guide bars 7B are displaced vertically opposite lower guide straps 7A and continues, like the latter, over the entire length of the working face, which should be developed. As will be explained hereinafter, the plow 10 is directed through an identical guide means on how �ignim guide strips 7A, and upper guide straps 7B. The guide bars 7A, 7B placed in such a way that they lie opposite each other and have the same distance from the coal face to the plane with his strugovym corps moved essentially parallel to the coal face, was supported on the outside on both sides, and coal could be developed for all possible working height determined by the height of the plow 1 and, in particular, strugovym the plow body 10 and the ascending section 5.

To move the plane 10 parallel to the coal face and along the guide bars 7A, 7B plow 1 longwall placed two separate circuits 11A, 11B of the plane as the drive means, wherein both strands 11A, 11B Struga consist of horizontal and vertical chain links have a continuous configuration, which rotates the chain. Pulling each of two branch circuits 11A, 11B of the plow is held within the sliding surface or the surface of the channel pan 3, while single branch of both circuits 11A, 11B of the plow passes on placed at an angle to the side of the pan 3 is preferably shown in a tubular guide rails 6A, 6B, which form channels for the chains, and returned to the section of the cavity. Asterisk plough chains, driven by respective drive mechanisms for the�I Struga 10 in a reciprocating movement in longwall circuits through Struga, preferably placed exclusively in the so-called head section at the upper end of a longwall panel, while the section of the recess, which is due to steeply dipping layered coal seam lies significantly below contains only deflecting pulleys for the two circuits 11A, 11B of the plow.

Fig.1 and 2 has already been clearly shown that the plow 10 has a relatively small thickness and depth and substance is greater in width than in thickness. Both guide bars 7A, 7B are at a relatively large distance vertically extending section 5 of the pan 3, and ploughing equipment by building occupies an intermediate space only partially. Since the plow 10 is directed with the help of his plow body on the guide strips 7A, 7B, lying one above the other, the torques on the merits are not created when the working force, torques must be supported strugovym the housing or the guide rails. Thus, ploughing equipment by the plow body 10 can be represented by a relatively lightweight design for Strug 10 due to a reduction of the forces of gravity could be moved to the head section at a relatively low installed capacity. For specialists in the art will be immediately obvious from Fig.1, the plow 10 can carry out mining activities only in the direction of movement �top, while if you move down it performs the idle speed. However, due to the inclination of the individual to direct pan, the pan was 3, even without moving elements, can excavate coal in a section of the recess under the action of gravity, since the slide typically starts to operate when the angle of inclination of about 24 rut. Reciprocating movement relative to a flat plane that is directed parallel to the coal face on the guide strips 7A, 7B, placed one above the other vertically, and moves through two separate circuits 11A, 11B, Struga, is an innovation for plows for steeply dipping layered coal seams, which plow installation are the basis for their cost-effective operation. However, the concept of the invention is also carried out in the performance and design of the plow 10 and its construction will be further described by additional reference to Fig.3-8.

In particular, Fig.1-3 show that the plane ploughing equipment by 10 has a housing consisting of several parts. Fig.1-3 ploughing equipment by the plow body 10 comprises a lower main element 20A plow body, the upper main element 20B plow body and, in this case, two mutually equally performed by intermediate elements 30 of the plow body. Only the basic elements 20A, 20B structure�new housing directly attached to the circuit plane, resistant to the tension method, using an appropriate fastening means or detent 21, wherein the retainer includes corresponding to the shape of the receiving part to a plurality of chain links of the respective chains 11A, 11B of the plow. The main elements 20A, 20B plow of the housing is formed as a mirror image of each other and the following description respectively identical structural elements made of both constructive elements 20A, 20B plow body, designated by the same reference positions. Each main element 20A, 20B plow the housing has a front guide piece 23 and the rear guide element 22 in the working direction A, the guide elements are respectively consist of moving runners, guided along rectangular guide strips (7A, 7B, Fig.1, 2). Front guide piece 23 is attached via a swivel pin 24 rotatably to the main element 20A plow body, and the rotary pin 24 can be inserted and removed from the bottom side 25 of the basic element 20A, 20B plow body. Sliding the slider, forming a rear guide means 22 that is attached rotatably via another swivel pin 27 mounted on the upper side 26 of the main elements 20A, 20B plow body, prodoljayuschegosya elongation 28 of the basic element 20 of the plow body. Elongation 28 are integrally formed on the main plow element 20 of the housing, respectively, around the outside, with almost twice as double towards the rear, in order to achieve a sufficiently large distance between the front and rear means 23, 22. In the depicted illustrative embodiment, the implementation, as clearly shown by Fig.3, the removable locking mechanism 21 for circuits 11A, 11B, Struga are respectively similarly, on 28 extending about the rear guide elements 22.

Between the intermediate element 30 of the plow body and the main plow element 20 of the housing in each case is dividing plane T at which the two elements 20, 30 plow body connected with the possibility of disconnection to each other by means of fasteners 40, the construction of which will be explained below. Elongation 28 continues far enough to the rear of this dividing plane T between the two elements 20, 30, and forms a uniform elongation of the plow body to the plane, despite the great distance between the front and rear guide elements 23, 22, might have, in the end, the reduced weight. Since, in Fig.1-8, the plow 10 is, in General, of the four elements, the other of the separation plane between two adjacent intermediate elements 30 �trudovogo corps the mount is adjacent intermediate elements 30 plow body is carried out at the division plane by identical fastening means 40. The design of the plow of the plow body 10 using the two outer core elements 20 or 20A, 20B plow body, which, in order to obtain the minimum working height, can also be directly attached to each other at the dividing plane through the mounting means provides the advantage that by choosing the appropriate number of intermediate elements can be achieved in almost any chosen working height by changing the effective width and/or height of the plow 10. Through the use of such intermediate elements plow body is possible through low altitude storing items or with repeated use of the same, to achieve cost-effective and controlled development of steeply dipping layered formations.

Fig.4 depicts a magnified top view of a segment of the plow 10, the segment of the core element 20 plow body, with strahovymi cutters 69 are placed on the front side, shown on the left segment and the intermediate element 30 plow body with attached strahovymi cutters 79, shown in the right p�Lovina. Dividing plane T between the primary element 20 of the plow body and the intermediate element 30 plow body is perpendicular to the height of the plow 10. All plow cutters 69 main plow element 20 of the housing attached to the tool holder 61, which is attached rotatably to the main plow element 20 of the body via a swivel pin 62. The possibility of rotation of the tool holder 61 is used at idle to rotate plow cutting edges of the cutters 69 opposite to the operating direction to a position in which the plow cutting edges of the cutters 69 are in contact with the coal face. The rotary direction of the tool holder 61 on the main plow element 20 of the housing can be seen in particular from the sectional view of Fig.5. The entire side surface 63 of the tool holder 61 remains on the main plow element 20 of the housing and the pivot pin 62 protrudes from the top of the main plow element 20 of the housing. To ensure the forces perpendicular to the axis of the swivel pin of the pin 62, the tool holder 61 holding the guide blade 70 on the main plow element 20 of the housing by means of hook-shaped legs 64. With the clamp 65 that is installed with the possibility of taking on the free end of the swivel pin 62, a sufficient effect associated with the movement, the implementation�is to the left relative to the tool holder 61 to ensure its two limit positions of rotation in accordance with the direction of travel of the plow. The forces transmitted through the plow cutters 69, preferably transmitted to the main plow element 20 of the housing through the hook-shaped legs 64. Swivel pin 24 to the front of the guide means 23 attached to the main plow element 20 of the housing on the underside of the tool holder 61, as may be most clearly seen in Fig.6.

A detachable connection between the primary element 20 plow housing and other basic elements of plow 20 of the housing or the intermediate element 30 plow body is carried out by means of the fastening means 40, the construction of which is hereinafter explained with reference to Fig.7. Each of the fastening means 40, in particular, has a clamping screw 41 and a threaded shank, the axis of which lies, in the assembled state, the separation plane T and continues in the locking recesses 68, 78 on the upper side 27 and the bottom side 26. Each of the fastening means 40 further comprises two mutually identical clamps 42, each of which has an approximately U-shaped configuration and has a Central channel for the shank of the clamping screw 41. For binding or jamming together of the two main elements of the plow 20 of the housing or one of the main plow element 20 of the housing with the intermediate element 30 plow body, each clamp has two clamp�'s ledge 43, which are arranged on mutually facing inner sides with clamping surfaces 44, which are held in the form of a wedge, the distance between the clamping surfaces 44 increases with increasing distance from the base of the clamps 42. These clamping surfaces 44 cooperate with a wedge-shaped bevels 29 at the main plow element 20 to the housing and a wedge-shaped bevels 39 of the intermediate element 30 of the plow body. The wedge-shaped bevels 29 and 39 are, respectively, facing away from the dividing plane T, in the region of the locking recesses 68 and 78 on the upper sides 27, 37 and bottom sides 26, 36 of the main plow elements 20 of the housing or the intermediate elements 30 of the plow body. Appropriate dimensions for the depth of the locking grooves 68, 78 and the length of the clamping surfaces 44, and a wedge-shaped bevels 29, 39 allows a relatively high clamping force that must be applied perpendicular to the separation plane T by delaying at least one of the nut 47. In the shown illustrative embodiment of the clamping screw 41 for each clip 42 is provided with a separate nut 47 so that the fastening of the fastening means 40 to be carried out in accordance with access, both on top and bottom, or only one of the two parties.

The configuration of the plow p�scow 69 on the core elements 20 of the plow body and plow cutters 79 on the intermediate element 30 plow body is designed to to plow cutters 69, 79 were placed, in aggregate, approximately along the W-shaped profile. Thus, adjacent plow cutters are affected in different planes on the minerals, which can actually be extracted, so that the force loosening each individual plow cutter 69 or 79, they could act sufficiently. As can be seen clearly in Fig.2, respectively the outer plow cutters 69 are preferably further in the direction of working than all other plow cutters 69, 79. Plow cutters, placed in the middle of all plow body, in turn, set further forward than the rest of the plow cutters on the intermediate elements of the plow body. Behind the plow cutters are made of deepening or smoothing plow in the housing with the possibility to send to the pan minerals mined in the coal mine.

Four guide means 23, 22, as a whole, and two guide means 23, 22 arranged on the lower core element 20A plow corps and two other guiding means 23, 22 upper main element 20B plow body are in working condition when the plow 10 is moved in the working direction And to the two front guide means 23 and, with only one of the rear guide means 22 is subjected to the action� load bearing forces in accordance with the resistance of the extracted mineral. Thus, one of the two rear guide means 22 is not yet in direct contact with the corresponding guide bar 7A or 7B, as the distance between the axes of rotation of the rotary pins 27 of the rear guide means 22 is preferably slightly less than the distance between the axes of rotation of the swivel pins 24. However, the distance may also be the same. The possibility of rotation of each of the sliding runner, as the guide means 22, 23, provides at any time that the trailing runner optimally corresponds with the guide rail 7A or 7B.

The plow 10 is provided with a drive element 90, which, as can be seen most clearly from Fig.1 and 3, in the form of a narrowing of the drive unit and attached rotatably preferably with a rotary pin to the locking lug 92 that forms a fixing protrusion for driving element 90. The fixing protrusion 92 is approximately midway between the swivel pin 24 to the front of the guide means 23 and the pivot pin 27 to the rear guide means 22. Each main element 20A, 20B plow housing provided with a locking lug 92.

Fig.8 depicts a preferred illustrative embodiment of the sliding runner 85 as the guide means�and 23 or 22. To interact with nearly rectangular cross-section guide channels (7A, 7B, Fig.1), sliding the slider 85 has a rectangular slot recess 86, which continues throughout the length of the sliding runner 85. Guide groove 86 is limited on both sides of the rigid guide prongs 87, which are connected in one piece with the main bone of 88, which has on its rear side hook-shaped lug 89 for channel swivel pin 24, 27. Hook-shaped lug 89 is made in a middle region of the blade 84, which has approximately the width of the guide recess (51, Fig.5 and 52, Fig.6) on the main plow element 20 of the housing and the thickness is markedly reduced relative to the full thickness of the sliding runner 85. As a consequence mutually offset surfaces, shown as an example by Fig.5 and 6, sliding the slider 85 can be guided in the guide grooves 51 and 52 in the main plow element 20 of the casing so that it can only move perpendicular to the axis of rotation of the respective rotary pin and transverse forces can be absorbed by the form.

Fig.9 and 10 depict a second illustrative variant of the plane 110. As in the previous illustrative embodiment, the implementation, the plow 110 is directed through two mutually opposite guide strips St�Lugovoi installation as shown in Fig.1. Ploughing equipment by the plow body 110 contains two basic elements 20A, 20B plow body, whose structure is identical to that in the previous illustrative embodiment, the implementation, therefore, reference is made to the description given in it. Each main element 20A, 20B plow body again provided with a rear guide means 22 and front guide means 23, which is attached rotatably to the main element 20A, 20B plow body. Plow cutters 69 both of the main elements 20A, 20B plow body again attached with the ability to detach the tool holder 61, which can be rotated relative to the base element 20A or 20B plow body around the rotary pin 62. The only difference between the illustrative embodiments of the implementation is performed by the intermediate element 130 plow body, which here consists of a single element, which is respectively attached on the outside through one end to the main element 20A plow body and using the other end to the main element 20B plow body through these same attachment means 40 which have been described further above with reference to the first illustrative variant implementation. To the intermediate element 130 plow yr�and respectively attached to the inner row plow cutters 179A and the outer row plow cutters W, in the shown illustrative embodiment of the five plow cutters are respectively attached to common plank 195 for cutters. To replace the plow cutters to remove the bar 195 for blades by unscrewing the two screws 196 and replace with others. Fig.10 illustrates most clearly, as may be established in a generally flat plane 110 in accordance with the invention, however, with the ability to develop the coal face height while venturing to a depth of about six times.

Fig.11 depicts a third illustrative embodiment of a plane 210. As in the previous illustrative embodiments, the plane 210 is also sent along two mutually opposite guide strips plow, as shown in Fig.1. Ploughing equipment by the plow body 210 contains or consists of only two main elements 20A, 20B plow body, whose structure is identical to that in the first illustrative variant of implementation, therefore, reference is made to the description set out there. Each main element 20A, 20B plow body provided with a front guide element 23, shown in the front view and rear guide means, which, all attached rotatably to the main element 20A, 20B plow body. Plow cutters 69 both of�main elements 20A, 20V plow body again attached with the ability to detach the tool holder 61, which can be rotated relative to the base element 20A, 20B plow body around, according to this view, the unaired swivel pin. Two basic elements 20A, 20B plow corps joins using the same attachment means 40 to the plow body minimum width and, therefore, the minimum working height, the depth of relatively narrow design of the plane is about half the working height. The drive unit can be mounted on one of the locking lugs 92.

To a person skilled in the art numerous modifications follow from the above description, modifications will be within the protection of the attached claims of the invention. In other, not shown embodiments, the plow, guided on both sides by guide strips, etc., lying one above the other, may also consist of one element of the plow body. However, all the benefits can transform the same plow body for various working heights would be lost.

1. Plow to plow installations for the extraction of minerals in inclined formation, in particular for the development of coal seams in crotophaga�ing formations, contains detachable ploughing equipment by a housing having two main elements (20, 20A, 20B) plow body, each main element of the plow body is provided with a locking mechanism (21) for a single traction circuit and one or more sliding bars (23, 22) to move the coal plow through the traction chains and plow for direction of the housing by means of sliding runners for at least two mutually spaced respective guide strips.

2. Plow according to claim 1, characterized in that the basic elements (20A, 20B) plow body is capable of attaching directly to each other by means of mounting clips for the formation of a plow body having initial working height.

3. Plow according to claim 1 or 2, characterized in that it further comprises at least one intermediate element (30; 130) plow corps, attached to the two main elements (20A, 20B) plow body by means of mounting clips (40) for the formation of plow body greater working height.

4. Plow according to claim 3, characterized in that each main element (20A, 20B) plow body and each intermediate element (30) plow corpus comprises locking means (68, 78, 29, 39) for mounting clips.

5. Plow according to claim 3, characterized in that it further comprises a set�tvo intermediate element (30) plow body, which is attached to or configured to attach to each other with the possibility of disconnection, with the main elements of the plow body is attached to or made with the possibility of joining the intermediate elements of the plow body with the possibility of disconnection by means of mounting clamps (40).

6. Plow according to claim 3, characterized in that the fastening clips contain U-bolt clamps (42), made with possibility of clamping by means of clamping screws (41) to the upper and lower sides on the main elements of the plow body or the intermediate elements of the plow body and overlap in the assembled condition of the separating plane (T) between them.

7. Plow according to claim 6, characterized in that the U-bolt clamps (42) have clamping projections having a wedge-shaped mutually facing each other clamping surface (44), wherein the retaining means is provided with a wedge-shaped bevels (29, 39) for engagement with the clamping surfaces.

8. Plow according to claim 3, characterized in that the fastening clips contain a couple of clips (42), the distance between which can be changed by using the clamping screw (41), the shank of which, in the assembled condition, placed in a separating plane (T) between the elements (20; 30), which are subject to connection.

9. Plow according to claim 1, characterized in that each main element (20A, 20B) �trudovogo the housing has an outer side, on which is placed a corresponding sliding runners (23, 22) and the inner side to which can be attached to another main element of the plow body or the intermediate element of the plow body.

10. A plane according to claim 9, characterized in that the pair of front and rear sliding runners (23; 22), respectively, placed one opposite the other on the outside.

11. Plow according to claim 10, characterized in that the sliding runners (23; 22) attached to the main element (20) plow body rotatably around the rotary pin (24; 27).

12. The plow according to one of claims. 9 to 11, characterized in that the basic elements of the plow bodies are on the outer side of the extension (28) which passes back over the connecting area on the inner side, and the rear, in the direction of motion of the two sliding runners (22) of each basic element of the plow body is attached to the extension (28) preferably with the possibility of rotary movement.

13. Plow according to claim 12, characterized in that the locking mechanism (21) for the respective conveyor chains made on the elongation (28).

14. Plow according to claim 1, characterized in that each main element of the plow body provided with a mounting protrusion (92) of the drive element (90) to move the extracted mineral during idling.

15. Plow according to claim 14, W�himself, the installation ledge (92) placed on the lower side (26) of the main element (20) plow body between the anchor points for sliding runners (23, 22) and preferably near the locking mechanism (21) for the traction chains.

16. Plow according to claim 1, characterized in that at least one of a main element (20) plow the housing or the intermediate element (30) plow body is made of at least one holding device for removable attachment plow cutters (69; 79).

17. Plow according to claim 16, characterized in that at least one holding device includes a detachable tool bar to install the plow cutters.

18. Plow according to claim 16, characterized in that the plow cutters (69; 79) placed on the front side of the plow body, wherein at least one of the plow cutters on the inner sides of the main elements of the plow body and plow cutters intermediate the plow elements of the case are set back in relation to strugovym the cutters on the outside.

19. Plow according to claim 18, characterized in that the plow cutters (69; 79) are on the front side, distributed over the height of the plow body, approximately W-shaped arrangement.

20. Plow according to claim 1, characterized in that each main element (20A, 20B) plow body is provided with a turning page�govem tool holder (61) to plough cutters, all plow cutters (69) related to the main plow element of the housing, preferably fixed or arranged to commit to a turning plow to the tool holder (61).

21. Plow for mining in inclined formation, in particular for the development of coal seams in steep formation, having a plane, at least one conveyor chain to move the plow in the coal mine, and the guide mechanism, which is placed or made with the possibility of accommodation along the coal face and on which the plow is forced into and through the guide sliding runners, and plane (10; 110; 210) has a detachable ploughing equipment by a housing having two main elements (20A, 20B) plow body, each main element of the plow body is provided with a locking mechanism (21) for a single traction circuit (11A, 11B) and one or more sliding guides runners (23; 22), wherein the guide mechanism has two guide bars (7A, 7B) which are placed at a distance from each other and essentially at the same distance from the coal face and ploughing equipment by which the body is forced into and through their guides sliding runners (23, 22).

22. The plow according to claim 21, characterized in that the basic elements (20A, 20B) strogova�about the housing configured to attach directly to each other by attachment means (40) for the formation of a plow body, having initial working height.

23. The plow according to claim 21, characterized in that it further comprises at least one intermediate element (30; 130) plow corps, attached to the two main elements (20A, 20B) plow body by fixing means (40) for the formation of plow body greater working height.

24. The plow according to claim 23, characterized in that the fixing means is formed of U-shaped clamps (42), made with possibility of clamping by means of clamping screws (41) to the upper and lower sides on the main elements of the plow body or the intermediate elements of the plow body and overlap in the assembled condition of the separating plane (T) between them.

25. The plow according to claim 24, characterized in that the terminals (42) have clamping projections having a wedge-shaped mutually facing each other clamping surface (44), wherein the retaining means is provided with a wedge-shaped bevels (29, 39) for engagement with the clamping surfaces.

26. The plow according to claim 21, characterized in that each main element (20A, 20B) plow body has an outer side, on which is placed the appropriate guides sliding runners (23, 22) and the inner side to which can be attached to another main element of the plow body ellipsometry plow element of the case.

27. The plow according to claim 26, characterized in that the basic elements of the plow bodies are on the outer side of the extension (28) which passes back over the connecting area on the inner side, and the rear, in the direction of travel, the two guides moving runners (22) of each basic element of the plow body is attached to the extension (28) preferably with the possibility of pivoting movement, wherein the locking mechanism (21) for the respective traction chain is made on the elongation (28).

28. The plow according to claim 21, characterized in that each main element (20A, 20B) plow body is provided with a rotary strugovym tool holder (61) to plough cutters, all plow cutters (69) related to the main plow element of the housing, preferably fixed or arranged to commit to a turning plow to the tool holder (61).

29. The plow according to claim 21, characterized in that each main element of the plow body has front and rear guide rails sliding runners (23, 22), wherein the front and rear guides of the sliding runners (23, 22) movably attached rotatably to each fixed element (20) plow body, wherein at least the rear sliding plate of the slider (22) in the assembled state, interfaced as�em with guide rail movable with clearance for to ploughing equipment by the body, when you work, took a three-point support by three of the four sliding guides runners.

30. The plow according to claim 21, characterized in that the guide mechanism has an angular or L-shaped pan (3), the lower guide bar (7A) attached to the first sector (4) hosted on the soil of the bottom, and the upper guide bar (7B) is attached via console lever (9) to the second area (5) pan, passing at an angle from the lower portion.



 

Same patents:

FIELD: process engineering.

SUBSTANCE: set of inventions relates to cutters to be attached to grader body element and to underground extraction graders, particularly, to development of steeply inclined coal seams. Grader comprises body with means to guide it in its guides, cutters with multiples seats for individual cutters. Grader comprises split body with two main elements and body mid element to be fitted between said main elements and tool plate attached to grader body mid element. Tool plate front has recesses for fixation of cutter seats while its rear has slitted recess for rigid connection of fixation ledge made at grader body mid element. Tool plate rear part front end has longer top part and shorter locking part with slitted recess made there between.

EFFECT: reliable attachment of cutters, optimized development of minerals.

16 cl, 9 dwg

FIELD: mining.

SUBSTANCE: invention refers to mining industry, and namely to towing trolley for underground mining drawknife. Towing trolley for underground mining drawknife includes a towing trolley body inserted in the drawknife body cavity, which is provided on rear side of the cavity guide with a connection element to fix the drawknife chain, and on front side of the cavity guide - with front part, the ends of which indicate the movement direction and form thrust surfaces to interact with counter-thrust surfaces in the drawknife body cavity; at that, a damping device is integrated into the front part of towing trolley and acts with damping in both movement directions. Connection element is movable relative to thrust surfaces with overcoming of back force of damping system of damping device, which is located between thrust surfaces. The provision is made for a receiving body that is rigidly connected to the connection element to receive the damping system. Thrust surfaces form ends of movable bushing, in inner space of which the receiving body is located in movable manner; at that, inner sides of thrust surfaces preferably form thrusts for relative movement between movable bushing and receiving body.

EFFECT: increasing the device efficiency.

16 cl, 12 dwg

FIELD: mining.

SUBSTANCE: guide for pulling chain of mining machine, namely for chain of plough on mining plough with drive stations and/or rotary sprockets of pulling chain (11), which are installed in end sections of mining machine, and at least with one element (21; 121) of the guide for chain, which are spatially located near chain sprockets (18) on drive station and/or turning station and pressed across chain movement direction to its load and/or empty branch. Element (21; 121) of chain guide includes at least one pressure roller (22; 122) pressed to links (33) of pulling chain (11); at that, pressure roller (22; 122) is installed on roller axis (29; 129) with possibility of rotation and replacement together with it. Axis (29; 129) of pressure roller (22; 122) rests on brackets (28, 28A; 128) of bearings, which are installed in receiving pocket (40; 140); besides, brackets (128) of bearings in receiving pocket (140) are protected against unfixturing at least by means of one retractable fixture (190). Pressure roller (22; 122) has bearing race (23) matched with enveloping surface (34) determined with links (33) of the chain. Pressure roller (22; 122) is arranged in lead-in unit (25; 125) installed in inlet section (19) of drive station and/or turning station (17) with possibility of being replaced. Brackets (28, 28A; 128) of bearings are installed in receiving pocket (40; 140) with possibility of being replaced. Brackets (28, 28A) of bearings in receiving pocket (40) are protected against unfixturing by means of a hinged cover (35). Upper bracket (128) of bearing is equipped with guides (173) for retractable fixtures (190). Above receiving pocket (140) there installed are retaining units (166) with fixing seats (165) facing each other, and retractable fixtures (190) have fixing projections (198) which are locked in fixing seats (165) to protect upper bracket (128) in receiving pocket (140) against unfixturing. Guide includes pair of retractable fixtures (190); at that, each retractable fixture (190) has U shape with base (191) and three elbows of which one extreme elbow (193) and intermediate elbow (194) on outer sides facing each other are equipped with guide planks (195, 196) to be installed in guides (173) with form closure, and the second extreme elbow (192) has passage opening (199) for locking bolt. At the bottom of receiving pocket (14) there located is lower seat (155) for roller axis (129), and is mainly made in lead-in unit (125) as a part of it or rigidly attached to it. Guide includes several pressure rollers pressed or to be pressed to chain (11) and located one after the other in chain movement direction. Pressure roller (22) is pressed to chain under action at least of one elastic element. Pressure roller (22) is pressed to the chain under action at least of one shock absorber.

EFFECT: improved wear resistance of the chain.

12 cl, 7 dwg

FIELD: mining.

SUBSTANCE: proposed section of tear-off planer comprises guide element arranged on the side of mined-out space from haulage chute and return travel conveyor chute, upper channel for haulage chain and lower channel for haulage chain, and guide slot, open towards breakage face, for engagement of under-conveyor plate of tear-off planer. Note here that said guide element can carry at least one cover element to stop inspection hole for both haulage chain channels that comprises connecting cantilever for hydraulic cylinder to control conveyor unit inclination and receiving bins for heads of boltless joint between conveyor chutes in rigid joints of adjacent sections of tear-off planer guides. Guide element consists of casting incorporating receiving pans, and/or return travel conveyor chute sections on the side of mined-out space, and/or guide for under-conveyor plate of tear-off planer.

EFFECT: longer life, efficient use.

15 cl, 6 dwg

FIELD: mining.

SUBSTANCE: invention refers to driving facility for sprockets of chain drives, particularly to drive of scraper-chain transporters or chain plane knives for underground mine developments. Drive incorporates the asynchronous electric engine and a gear box. Also the asynchronous electric engine consists of an engine with feeding from a frequency converter, while there is an intermediary two-speed sprocket gear box in the driving block between an engine shaft and the gear box; the intermediary gear box is designed in particular as the front gear box with one starting and one normal stage, when by means of the latter starting effect in the starting stage can be achieved, which is required for starting of loaded scraper-chain conveyer or for free pulling of the chain plane knife.

EFFECT: regulating rotary speed and torque of asynchronous electrical engines.

22 cl, 3 dwg

FIELD: mining.

SUBSTANCE: invention refers to mining, particularly to guide for plough with chain rod. The guide of the plough with chain rod consists of guiding sections which are made complex and designed to be connected between themselves by means of connecting elements providing high tensile strength and angular freedom. Also each guiding section of the plough has middle part with chain guiding channels arranged one above the other; corresponding end part is welded to each side of the middle part; this end part is made out of integral cast item with assembled one above the other sections of chain channels separated with cast-on antifriction distance element. The end sections are equipped with cast-on opened from the side of mining face pockets for connecting units which serve as connecting elements. Each end section has predominantly closed circular upper section of the chain channel where an upper section of the chain channel has conjugating projection at one of the two side parts, while an upper section of the chain channel of the other end section has responding indent.

EFFECT: increased service life of plough guide and economy of fabrication.

18 cl, 8 dwg

FIELD: guiding devices for chain in mining machine, in particular, in mining drawknife.

SUBSTANCE: guiding device for chain is mounted in one of its chain channels for loading or blank branch in area of transition to driving block or rotary mechanism. Device has receiving pocket open towards driving chain and hold-down tool. Pocket is limited at end by hinged finger positioned across chain movement direction. Hold-down tool on one end is provided with base element for finger, synchronized with hinged finger, open on one side, and also with holding element. Hold-down tool has on its lower side a holding surface, adjoining driving chain in state of hold-down setup in receiving pocket and of holding.

EFFECT: shorter time needed for repairs.

14 cl, 3 dwg

The invention relates to the mining industry, mainly for stoping coal complexes with mehrabani and plows

The invention relates to mining

FIELD: guiding devices for chain in mining machine, in particular, in mining drawknife.

SUBSTANCE: guiding device for chain is mounted in one of its chain channels for loading or blank branch in area of transition to driving block or rotary mechanism. Device has receiving pocket open towards driving chain and hold-down tool. Pocket is limited at end by hinged finger positioned across chain movement direction. Hold-down tool on one end is provided with base element for finger, synchronized with hinged finger, open on one side, and also with holding element. Hold-down tool has on its lower side a holding surface, adjoining driving chain in state of hold-down setup in receiving pocket and of holding.

EFFECT: shorter time needed for repairs.

14 cl, 3 dwg

FIELD: mining.

SUBSTANCE: invention refers to mining, particularly to guide for plough with chain rod. The guide of the plough with chain rod consists of guiding sections which are made complex and designed to be connected between themselves by means of connecting elements providing high tensile strength and angular freedom. Also each guiding section of the plough has middle part with chain guiding channels arranged one above the other; corresponding end part is welded to each side of the middle part; this end part is made out of integral cast item with assembled one above the other sections of chain channels separated with cast-on antifriction distance element. The end sections are equipped with cast-on opened from the side of mining face pockets for connecting units which serve as connecting elements. Each end section has predominantly closed circular upper section of the chain channel where an upper section of the chain channel has conjugating projection at one of the two side parts, while an upper section of the chain channel of the other end section has responding indent.

EFFECT: increased service life of plough guide and economy of fabrication.

18 cl, 8 dwg

FIELD: mining.

SUBSTANCE: invention refers to driving facility for sprockets of chain drives, particularly to drive of scraper-chain transporters or chain plane knives for underground mine developments. Drive incorporates the asynchronous electric engine and a gear box. Also the asynchronous electric engine consists of an engine with feeding from a frequency converter, while there is an intermediary two-speed sprocket gear box in the driving block between an engine shaft and the gear box; the intermediary gear box is designed in particular as the front gear box with one starting and one normal stage, when by means of the latter starting effect in the starting stage can be achieved, which is required for starting of loaded scraper-chain conveyer or for free pulling of the chain plane knife.

EFFECT: regulating rotary speed and torque of asynchronous electrical engines.

22 cl, 3 dwg

FIELD: mining.

SUBSTANCE: proposed section of tear-off planer comprises guide element arranged on the side of mined-out space from haulage chute and return travel conveyor chute, upper channel for haulage chain and lower channel for haulage chain, and guide slot, open towards breakage face, for engagement of under-conveyor plate of tear-off planer. Note here that said guide element can carry at least one cover element to stop inspection hole for both haulage chain channels that comprises connecting cantilever for hydraulic cylinder to control conveyor unit inclination and receiving bins for heads of boltless joint between conveyor chutes in rigid joints of adjacent sections of tear-off planer guides. Guide element consists of casting incorporating receiving pans, and/or return travel conveyor chute sections on the side of mined-out space, and/or guide for under-conveyor plate of tear-off planer.

EFFECT: longer life, efficient use.

15 cl, 6 dwg

FIELD: mining.

SUBSTANCE: guide for pulling chain of mining machine, namely for chain of plough on mining plough with drive stations and/or rotary sprockets of pulling chain (11), which are installed in end sections of mining machine, and at least with one element (21; 121) of the guide for chain, which are spatially located near chain sprockets (18) on drive station and/or turning station and pressed across chain movement direction to its load and/or empty branch. Element (21; 121) of chain guide includes at least one pressure roller (22; 122) pressed to links (33) of pulling chain (11); at that, pressure roller (22; 122) is installed on roller axis (29; 129) with possibility of rotation and replacement together with it. Axis (29; 129) of pressure roller (22; 122) rests on brackets (28, 28A; 128) of bearings, which are installed in receiving pocket (40; 140); besides, brackets (128) of bearings in receiving pocket (140) are protected against unfixturing at least by means of one retractable fixture (190). Pressure roller (22; 122) has bearing race (23) matched with enveloping surface (34) determined with links (33) of the chain. Pressure roller (22; 122) is arranged in lead-in unit (25; 125) installed in inlet section (19) of drive station and/or turning station (17) with possibility of being replaced. Brackets (28, 28A; 128) of bearings are installed in receiving pocket (40; 140) with possibility of being replaced. Brackets (28, 28A) of bearings in receiving pocket (40) are protected against unfixturing by means of a hinged cover (35). Upper bracket (128) of bearing is equipped with guides (173) for retractable fixtures (190). Above receiving pocket (140) there installed are retaining units (166) with fixing seats (165) facing each other, and retractable fixtures (190) have fixing projections (198) which are locked in fixing seats (165) to protect upper bracket (128) in receiving pocket (140) against unfixturing. Guide includes pair of retractable fixtures (190); at that, each retractable fixture (190) has U shape with base (191) and three elbows of which one extreme elbow (193) and intermediate elbow (194) on outer sides facing each other are equipped with guide planks (195, 196) to be installed in guides (173) with form closure, and the second extreme elbow (192) has passage opening (199) for locking bolt. At the bottom of receiving pocket (14) there located is lower seat (155) for roller axis (129), and is mainly made in lead-in unit (125) as a part of it or rigidly attached to it. Guide includes several pressure rollers pressed or to be pressed to chain (11) and located one after the other in chain movement direction. Pressure roller (22) is pressed to chain under action at least of one elastic element. Pressure roller (22) is pressed to the chain under action at least of one shock absorber.

EFFECT: improved wear resistance of the chain.

12 cl, 7 dwg

FIELD: mining.

SUBSTANCE: invention refers to mining industry, and namely to towing trolley for underground mining drawknife. Towing trolley for underground mining drawknife includes a towing trolley body inserted in the drawknife body cavity, which is provided on rear side of the cavity guide with a connection element to fix the drawknife chain, and on front side of the cavity guide - with front part, the ends of which indicate the movement direction and form thrust surfaces to interact with counter-thrust surfaces in the drawknife body cavity; at that, a damping device is integrated into the front part of towing trolley and acts with damping in both movement directions. Connection element is movable relative to thrust surfaces with overcoming of back force of damping system of damping device, which is located between thrust surfaces. The provision is made for a receiving body that is rigidly connected to the connection element to receive the damping system. Thrust surfaces form ends of movable bushing, in inner space of which the receiving body is located in movable manner; at that, inner sides of thrust surfaces preferably form thrusts for relative movement between movable bushing and receiving body.

EFFECT: increasing the device efficiency.

16 cl, 12 dwg

FIELD: process engineering.

SUBSTANCE: set of inventions relates to cutters to be attached to grader body element and to underground extraction graders, particularly, to development of steeply inclined coal seams. Grader comprises body with means to guide it in its guides, cutters with multiples seats for individual cutters. Grader comprises split body with two main elements and body mid element to be fitted between said main elements and tool plate attached to grader body mid element. Tool plate front has recesses for fixation of cutter seats while its rear has slitted recess for rigid connection of fixation ledge made at grader body mid element. Tool plate rear part front end has longer top part and shorter locking part with slitted recess made there between.

EFFECT: reliable attachment of cutters, optimized development of minerals.

16 cl, 9 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to mining, particularly to coal of minerals ploughing at inclined strata, particularly, of steep deposits. Ploughing plant comprises plough, at least on pull chain to displace plough over coal work face and guide mechanism arranged along coal work face by means of sliding guide runners. Said plough has split ploughing body with two main elements. Ploughing body main element is provided with retainer for separate pull chain and one or several guide sliding runners. Guide mechanism has two guide plates spaced apart by, in fact, identical distance to coal work face over which plough body is driven with help of their guide sliding runners.

EFFECT: working of coal seams with higher safety.

30 cl, 11 dwg

Up!