The executive body of the mining machine

 

(57) Abstract:

The Executive body of the mining machine is intended for use in machines for the destruction of a rock. The Executive body comprises a fixed shaft housing with cutters, drove placed on the circumference of the body ejectors with sprinklers, valve and mounted on a drive rod reflector. The case contains a piston pump, the piston of which is executed with the annular grooves on the outer side surface. End surface of the carrier has a wave-like protrusions interact with the rods of the pumps to create a reciprocating motion of the pistons during rotation of the housing. Annular groove of each piston is arranged to message cavity pump with the outlet valve. The design of the Executive body eliminates the accumulation of explosive concentrations of gases in the area of its operation and to reduce the concentration of dust. Automatic switching supply irrigation fluid to the irrigation canals and the cutters eliminates the waterlogging of extracted coal. 3 C.p. f-crystals, 8 ill.

The invention relates to the mining industry, mainly for coal, and can be used in the safety and healthy working conditions of miners factors explosion of gas and dust and the incidence of pneumoconiosis.

Known Shearer with jet-type dust suppression system.with. USSR N 1214918, E 21 C 27/02, 35/22, publ. 1990), including Executive agencies, irrigation system and additional device for dust suppression, consisting of the ejector with air intake and output openings, located at its ends, and fill, while the ejector is installed with its longitudinal axis parallel to the longitudinal axis of the harvester on the feeder between the Executive bodies.

The disadvantage of this harvester is the large distance of the ejector from sources of dust and sparking, which reduces the effectiveness of dust suppression and pleasevisit.

Known Executive body of the Shearer phase flow of water from 20 to 150 MPa (High pressure waterjet assised cutting system for shearer loaders/ Mining magazine. September, 1987, vol. 38, p. 238-241), including the gearbox with built-in radial-piston pumps, eccentric mounted roller bearing, check valve, cutters and sprinklers (nozzles) sapphire nozzles with a diameter of 0.6 mm, while the pistons are reported directly from the mouths of the nozzles.

The disadvantages of this Executive body is the complexity of the design and, despite the increase in the service life of the cutters mind the ku indicator dust content of counted particles of dust remained unchanged (relative to the traditional method of dust suppression with the use of sprinklers).

It is also known a device for implementing the method of normalization of the atmosphere in the pit of preparatory development (and. C. the USSR N 1663199A1, E 21 F 5/00, 35/22, publ. 1991), including the Executive body of the harvester, nozzles (sprinklers), placed in the cavity of the Executive body for sucking dust-Laden air and gas, the film-forming element, which is rigidly attached to the boom (the driver) combine at the outlet part of the nozzle, and the outer side surface of the nozzle at its outlet part is made of a perforated, and nozzle sprinklers aimed at the entrance of the nozzle, while the Executive body provided with a lamellar gratings and screw guide, its walls made with suction channels, which has a lamellar grating, and screw guides secured to the inner surface of the walls of the Executive body.

A disadvantage of this device are low reliability and design complexity, since the liquid film, in the conditions of constantly falling and razlichiya pieces and small particles destructible rocks, not able to separate the liquid and gas streams and is not received in its original form to the Executive body, and the plate grille and screws are the s due to abrasion of rock particles, or are clogged, because the vacuum created by the sprinklers in the nozzle, is clearly not enough to remove all products of destruction of rocks coming inside the Executive body.

The closest in technical essence is the Executive body of the mining machine ("Dedusting of air when operating mining machines and complexes". Expressinformatsia, vol. 7, M, Sneeuwval, 1985, S. 15-16), including attached to the shaft housing with cutters, drove placed on the circumference of the body ejectors with sprinklers made in the body of the channel for supplying irrigating fluid to the cutters and nozzles, the valve, the inlet of which communicates with the channel for supplying a liquid, and an exit channel for its submission to the sprinklers and fixed to a drive rod reflector.

This Executive authority inherent lack of effectiveness of the melting fine dust fractions, as well as a large expenditure on the purchase of expensive pumps and high-pressure hoses and a set of seals.

The technical problem solved by the invention is that the Executive body is equipped with piston pumps with automatic inclusion of filing irrigating zhidkosti mountains. In addition, there is automatic switching supply irrigating fluid to the sources of pilesgrove only when there is load on the cutter by installing a spring-loaded check valves in the case of the Executive body. This design will improve the reliability and efficiency of pileateds from the zone of destruction and eliminate waterlogging smitten rock.

The positive effect of the invention is achieved in that, with regard to the General characteristics closest to the technical nature of the Executive body, it has placed in the enclosure piston pumps having a cavity, and a piston provided with axial channels and provided with annular grooves on the outer side surface and end surface of the carrier provided with one or more wave-like protrusions, and the axial channels of the piston communicates with the cavities, which in turn is in communication with the channels for supplying fluid to the nozzles, and the rods of the pumps placed with the opportunity to interact with the protrusions drove and create a reciprocating motion of the piston during the rotation of the housing, this annular groove of the piston is arranged to message cavity nasienie check valves, posted by interoperable cutter with stop v valve when there is load on the cutter. For of the Shearer took equipped with a disk with holes, while the disk is located between the housing and the reflector with the formation of the cavity, and for digging machine cavity ejectors made in the space between the incisors.

The rationale for the positive effect of the invention using the following distinctive features:

1. Procurement Executive body piston pumps allows to increase the pressure of the irrigation fluid in the irrigation canals and, of course, the amount of sucked air with the gas and dust (by increasing the speed of movement of the dispersed fluid ejectors). The increasing speed of the fluid will increase the degree of its dispersion, i.e., the formation of fog.

2. Execution at the end of the carrier wave-like protrusions (projections) with the ability to communicate with the piston rods of the pumps and create a reciprocating motion of the piston, the outer lateral surface of which has an annular groove, allows you to automatically enable the supply of irrigation fluid to the irrigation canals of the ejectors in the process (rotation) used for irrigating fluid to the cutters with spring-loaded check valves with the possibility of interaction of the cutter with a shut-off valve element allows you to automatically enable the supply of irrigating fluid when there is load on the cutter and enable flow - when there is no load on it.

4. Automatic switching supply irrigation fluid to the irrigation canals of the ejectors and the cutters are in the process mining machines allows rationally fluid, to eliminate waterlogging broken coal, reduce obespechennosti workings and to improve sanitary and hygienic conditions of work of miners, especially when pulling layers of low power.

5. The supply of irrigating fluid to the mining machine with low pressure and increasing fluid pressure piston pumps directly to the Executive body reduces the cost of acquiring expensive pumps and high-pressure hoses, and a set of seals.

6. The supply of the Executive body of the Shearer disc with holes and position it between the casing and the reflector allows you to get a cavity which decreases the speed of movement (leaching) pylegazovozdushnoj mixture created by the ejectors, while in the cavity is increased, the concentration of thin-dispersed mist.

7. In the process, ejectors, for example, in the treatment combines gases (mainly methane and hydrogen sulfide) and various kinds of dust, respectively wydase the ol cavities ejectors and received in the cavity between the housing, the disk and the reflector. The gas sucked away from places of destruction, released into the atmosphere excavation. When passing the same dust along the aforementioned cavities occur three types of coagulation of dust: kinematic coagulation - output irrigating fluid out of the fill, gravity and thermal coagulation, while the coarse fraction of dust are deposited mainly due to the first two processes, and the fine fraction by a third. The rate of adhesion of dust particles depends mainly on the number concentration of rain. If this concentration is sufficiently high, the effect will be significant. In this regard, to increase the effectiveness of dust suppression in the Executive body of the Shearer is formed by the cavity between the reflector and the disk. In this cavity, the relative concentrations of fog will be significantly higher than in the cavities of the ejectors and in the cavity between the housing and the disk.

During operation of the ejectors in the Executive body of the digging machine gas and dust together with air flow passing along the cavities ejectors and do in the area of the recess, with the formation of fog during the meeting the air / water stream from the mountain and the products of its razrusheny generation, increases the efficiency of dust suppression both large and small fractions of dust.

8. The cavity of the ejectors made in the body of the housing and formed by the walls inside the case ensures reliable and stable operation of the suction system pylegazovozdushnoj flow from the zone of destruction of a rock, with no breakage.

9. In the known technical solutions are the hallmarks of this combination and the relationship was not found.

Summary of the invention "of the Executive body of the mining machine" is illustrated by a graphic image, where Fig.1 is a schematic diagram of the gas and paliatsos of the Shearer; Fig.2 - schematic diagram of gas and paliatsos digging machine; Fig.3 - the face was taken from a ledge of smooth forms for Executive agencies with high speed; Fig.4 - the end has led to projections of smooth forms for Executive agencies with a low speed, and Fig. 5 - placement of the tabs on the end of the drove (a view along arrow A of Fig.1 and Fig.4), and Fig.6 and 7, the shape of the protrusions (deployed), respectively, for one and three protrusions, and Fig.8 - check valve with shut-off element.

The Executive body of the mining machine comprises a fixed shaft 1 is CE channels 7-10 for supplying irrigating fluid to the cutters and nozzles, the valve 11, the inlet of which communicates with the channel 12 for supplying a fluid, and the output channels 8 and 10 for its submission to the incisors with sprinklers and fixed to a drive rod reflector 13.

The Executive body is equipped accommodated in the housing piston pump 14 having a cavity 15 and the piston 16 pumps provided with axial channels 17 and is provided with annular grooves 18 on the outer side surface 19. The end surface 20 of the carrier (Fig.3-7) provided with one or more wave-like protrusions 21. The axial channels of the piston communicates with the cavities, which in turn is in communication with the channels 22 and 10 for the fluid supply to the sprinklers. The rods 23 pumps placed with the opportunity to interact with the protrusions 21 and drove the creation of the reciprocating motion of the piston during the rotation of the housing. Stroke depends on the height of the ledge and is determined by the amount and pressure of fluid necessary for the efficient suction of dust and gas ejectors. Annular groove 18 of the piston is arranged to message cavity pump with the outlet valve through channels 24 and 7. Channels 9 for supplying irrigating fluid to the cutters (Fig.8) is provided with a spring-loaded non-return valves 25, hosted enabled the sustained fashion the body of the Shearer took 4 is equipped with a disc 27 with holes 28, when this disk is located between the housing 2 and the reflector 13 with the formation of the cavity 29.

In the Executive body of the digging machine output ejectors 5 is made in the space between the incisors.

Unlike the closest analogue in the proposed technical solution cavity ejectors are made in the body of the housing. The required number of ejectors and piston pumps is determined by the structural parameters and the size of the Executive body, as well as requirements to ensure safe and healthy working conditions of miners. The cavity 15 of the piston pump has a spring 30. Sprinklers 6 ejectors 5 provided with a spring-loaded non-return valves 31. Articulating surfaces of the rods 23 in piston pumps and open-end projections 21 (preferably an even number) on the drive rod 4 is made of corrosion-resistant materials with low coefficients of friction and abrasion. In the embodiment, the disk 27 and the reflector 13 are round in shape with cut off at the bottom of the segment with the possibility of loading smitten rock mass to the container by a screw blades 32 at the recess of the thin and thin layers by means of harvesters. Annular groove 18 communicates with an axial channel 17 through Canusa liquid is supplied under low pressure through the channel 12 in the valve 11. From the valve the fluid through the channels 7, 8 and 9 is fed to the cutters 3, and channels 7 and 24 to porshneva pump 14. The cutter 3 channel 9 (Fig.1, 2 and 8) has a non-return valve 25 with the locking element 26. Annular groove 18 on the outer side surface of the piston 16 is not aligned with the channel 24. Ways irrigating fluid is blocked.

During the rotation of the Executive body automatically supply irrigation fluid to the irrigation ejectors, because the interaction of the rod 23 with the protrusions 21 of the piston 16 performs a reciprocating movement. In Fig.1 and 2 show the position of the piston when the irrigation fluid to the irrigation act, because the piston rod is not on the protrusion 21, and the end surface 20 of the carrier 4 (Fig.1, 2, 3, 4, 6 and 7). During the rotation of the Executive body of the rod 23 of the piston 16 passes end surface and fluidly communicates with the protrusion 21, and the piston moves away from the carrier 4 (Fig.1 and 2) and the annular groove 18 is combined with the channel 24. Irrigating fluid from the channel 7 through the channel 24, the annular groove 18 and the channels 33 and 17 are received in the cavity 15 of the pump. In the cavity 15 through the efforts arising from the movement of the piston, the fluid pressure increases and it comes STI depends on stroke after passing through the circular groove 18 of the channel 24. With the passage of the rod 23 the top of the ledge 21 of the piston under the action of the force of the spring 30 will move in the opposite direction, i.e. towards carrier 4. Next, the process fluid will be repeated, and the frequency of the reciprocating motion of the piston will be determined by the number of the tab on the driver, and the speed of the Executive body.

When working sprinklers inside the ejectors 5 vacuum is created. When this dust-Laden flue gas stream is extracted from the zone of destruction and passes through the ejectors in which the dust particles, mainly of coarse fractions, wetted.

The Executive body of the Shearer (Fig.1) of the ejectors 5 dust-Laden flue gas flow through the cavity between the housing 2 and the disk 27 and holes 28 in the disk enters the cavity 29, and the part gazopodobnogo stream (containing mainly large particles of dust by centrifugal force generated by the rotation of the housing and twist flow in ejectors) is reflected from the disc 27 and is discharged in the form of plasma in the atmosphere of the mine workings through the gap between the housing 2 and the disk 27. Another gazopodobnogo stream (containing polydisperse aerosol, mainly fine fractions), opacified misting due to the expansion of the flow at the exit of the holes and the additional dispersion liquid upon impact of the reflector 13, and by reducing the speed of removal of fog from the cavity 29, relative to the cavity between the housing 2 and the disk 27. As a result of increasing concentrations of fog (density) increases the efficiency of the suppression of the fine fractions of dust.

In the Executive body of the digging machine (Fig.2) of the ejectors 5 air flows into the area of the recess, with the formation of fog during the meeting flow with carbon array and the products of its destruction and creates a veil of dispersed liquid, which, due to the increased density of the fog and isolation zone excavation, wets the dust particles coming from deep within the recesses of the array in the atmosphere of the mine workings.

In order to reduce the flow of irrigating fluid, it is preferable to use an umbrella sprinklers.

In the process of rock failure by the Executive authority supply irrigating fluid to the cutters, as well as submitting it to the sprinklers, is carried out automatically. When interacting cutter with rock, i.e., when there is load on the cutter (Fig.8, the locking element prevents the destruction of the check valve, not shown), the cutter 3 is fed back and its holder 36 near the Oia fluid from channel 9 to channel 34, along the outer surface 35 of the tool holder 36 of the cutter 3 and the inner surface 38 of the tool holder 39 to sources of dust and sparking. When removing the load on the cutter feed fluid is stopped. Next, the processes of filing and termination of the fluid will rotate depending on whether or not the load on the cutter.

In the process of doing the repair preparatory work requiring rotation of the Executive body without a supply of irrigation fluid to the irrigation canals in the ejectors, provided by the device, blocking the flow of liquid (figures not shown).

Experimental verification system ejector suction with built-in housing piston pumps carried out in laboratory conditions. Experimental verification and analysis of experimental data from the literature on this issue, showed that, compared with the closest analogue to the invention allows to increase the volume of sucked pylegazovozdushnoj flow. The system is available.

The base object (log, "Coal", 1996, No. 5, S. 30 and N 7, advertising sheet) contains the Executive bodies of the treatment and roadheaders (for example, 800, 900 and P-110) with a system of high-pressure irrigation with pirganj missing, therefore, the concentration of fine dust fractions in the process of destruction of a rock is relatively high.

We offer Executive body of the mining machine eliminates the disadvantages of the nearest analogue and especially the underlying object. The reduced piston pumps with automatic inclusion in the process of rotation of the body allows to increase the volume of sucked pylegazovozdushnoj flow from the zone of destruction of the mountain massif and to provide a safe and healthy working conditions of miners factors explosion of gas and dust and the incidence of penumonia. Execution channels for irrigating fluid to the cutters with spring-loaded check valves with the possibility of interaction of the locking element of the valve and the cutter will provide automatic switching supply irrigating fluid when there is load on the cutter and off the supply when removing a load on it. In addition, automatic switching supply irrigation fluid to the irrigation canals of the ejectors and the cutters are in the process mining machines allows rationally fluid, to eliminate waterlogging broken coal, to reduce the flooding of mine workings and to improve sanitary and hygienic conditions of work of miners, the person is config on the shaft housing with the cutters, drove placed on the circumference of the body ejectors with sprinklers, made in the case of the channels for supplying irrigating fluid to the cutters and nozzles, the valve, the inlet of which communicates with the channel for supplying a liquid, and an exit channel for its submission to the sprinklers and fixed to a drive rod reflector, characterized in that it has placed in the enclosure piston pumps having a cavity, and the pistons of the pumps provided with axial channels and provided with annular grooves on the outer side surface and end surface of the carrier provided with one or more wave-like protrusions, moreover, the axial channels of the piston communicates with the cavities, which, in turn, communicated with the channels for supplying the fluid to the nozzles, and the rods of the pumps placed with the opportunity to interact with the protrusions drove and create a reciprocating motion of the piston during the rotation of the housing, with the ring groove of the piston is arranged to message cavity pump with the outlet valve.

2. Executive authority under item 1, characterized in that the channels for supplying irrigating fluid to the cutters provided with a spring-loaded check valves placed with the possibility of the th body p. 1, characterized in that of the Shearer took equipped with a disk with holes, while the disk is located between the housing and the reflector with the formation of cavities.

4. Executive authority under item 1, characterized in that the digging machine cavity ejectors made in the space between the incisors.

 

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