Method to form trajectory of dragline mine excavator bucket and working equipment for its realisation

FIELD: mining.

SUBSTANCE: method to form a trajectory of excavator bucket motion is carried out with the help of an operation of putting a handle with the bucket into backward motion in the vertical plane in a system of coordinates connected to a boom. At the same time the axis of handle rocking in the specified system of coordinates is fixed. The operation of trajectory curvature control is carried out by change of the distance between the bucket and the axis of handle rocking. At the same time the handle rocking axis fixed in the system of coordinates connected to the boom is moved in the system of coordinates connected with the handle along the circumference arc, the centre of which is at the end of the handle. The proposed method is realised by working equipment comprising a boom, a handle with a bucket rigidly installed on it, a rope mechanism of bucket lift and a discharge mechanism. Besides, the discharge mechanism comprises a yoke, which forms rotating couples with the boom and the handle, and a hydraulic cylinder, the stem and body of which are connected hingedly with the yoke and handle accordingly.

EFFECT: simplified design of a discharge mechanism, at the same time possibility is provided to adjust bucket movement trajectory.

2 cl, 3 dwg

 

The invention relates to mining machines used in the development of mineral deposits in an open way, namely to career excavators type "shovel" with cable-driven lifting of the bucket.

The working equipment of the cable quarry excavator type "shovel" includes a shaft, a handle mounted on it with a bucket, the engine head and the cable hoist bucket. A rope excavators, the trajectory of the cutting edge of the bucket is formed as a result of the implementation of two operations: cast handle with bucket in swinging movement in a vertical plane in the coordinate system associated with the bolt, the axis of swing of the handle in this coordinate system fixed and adjustment operations of curvature of the trajectory. The second operation is carried out either by changing the distance between the bucket and the axis of swing of the handle, which in this case is fixedly mounted in the boom, either by moving the axis relative to the boom.

The famous cable car career excavator type "shovel" (P&N 2800 XP(In), booklet Harnishfeger Corporation, Milwaukee, WI 53201), in which the handle is connected with an arrow through the saddle bearing. In the kinematic connection of the boom, dipper and saddle bearing rotational formed and tupasela kinematic pair, allowing for the rotation and translational movement of the handle relative to the boom. The combination of these three links given drive kinematic pairs is a rotational-translational mechanism of the power cable excavator. The actuator rotational-translational mechanism of the pressure, under which there is a forward movement of the handle relative to the saddle bearing, located on the boom and made in the form of sesterhenn rack and pinion drive mechanism. In the process, the excavator does periodically shifting face by a distance equal to the amount of movement of the handle relative to the saddle bearing. After another, shifting the digging begin when fully drawn stick, then gradually push with a drive mechanism pressure, increasing to a maximum value of the radius of the trajectory digging.

Note three distinctive characteristic of work equipment excavator-analogue: 1) the mechanism of the head contains the translational kinematic pair; 2) the drive mechanism of the head is located on the boom; 3) the radius of the circular path of the cutting edge of the bucket can be modified and the center of rotation of the bucket motionless.

The second distinctive feature should be attributed to the merits of the excavator-similar as the placement of the drive mechanism pressure on the boom, the connection is authorized with turntable swivel, eliminates dynamic loading of metal turntable and installed it mechanisms from exposure to forces of pressure.

The third hallmark is evaluated positively, as selling pressure by changing the radius of curvature of the trajectory of the cutting edge of the bucket is the same for any point of the trajectory digging - this simplifies the management excavator, does not tire the operator and, therefore, positively affects the performance of the excavator.

And this is the first distinctive feature should be attributed to the shortcomings of work equipment excavator-analogue, given the fact that the pressure mechanism includes wearing open kinematic pair, and drive this mechanism includes a multi-step and time-consuming to manufacture gear, belt and other mechanical transmission that is built in metal working equipment. The combination of these factors leads to the reduction of the most important indicators of quality excavator, namely, manufacturability, durability, and maintainability.

The famous cable car career excavator BUSYRUS-795B (brochure BUSYRUS Electric Mining Shovels-795, World Headquarters, 1100 Milwaukee Avenue, South Milwaukee, Wisconsin, 53172-0500, USA), selected as a prototype. The excavator is equipped with two arrows in Pomogailo mobile and basic stationary. On the fixed arm mounted on the rotary platform, are HEADUNITS of the lifting mechanism of the bucket. Mobile boom pivotally connected with the pivoting platform excavator with the possibility of relative rotation under the action of the drive cylinder, the rod of which is connected to this shaft, and the cylinder is connected to a two-legged stand, which is installed on the rotary platform and passes to it the force of the head pressure developed actuated by a hydraulic cylinder. A handle pivotally connected with a movable boom with the possibility of relative rotation under the action of the hoisting rope of a lifting mechanism of the bucket. Collectively rotating platform with two-legged stand, the movable shaft, the drive cylinder and the handle form an articulated i.e. the representing mechanism of the pressure of the working equipment of the excavator. Moreover, when turning the mobile boom from one extreme position to the other the axis of rotation of the handle attached to it by the bucket moves in an arc relative to the main stationary arrows, and the distance between the bucket and the axis of rotation of the handle remains constant. The result is that in different points of the trajectory digging to implement the teeth of the bucket into the soil at the same depth have the center of rotation of the handle to move at unequal distances, Thu the complexity of the driver, therefore negatively affect the performance of the excavator.

Highlight three distinctive characteristic of work equipment excavator prototype: 1) in the mechanism of pressure there is no translational kinematic pair; 2) the force of pressure through the winch pressure acts on the rotary platform; 3) the radius of rotation of the cutting edge of the bucket is constant, and the center of rotation moves in an arc, in the coordinate system associated with a fixed boom. The use of the mechanism of pressure excavator prototype constructive scheme articulated, i.e. allows to get rid of such defects excavator-analogue, such as rapid wear of open kinematic pairs, and the presence of multi-step and time-consuming to manufacture gear, belt and other mechanical transmission. However, the disadvantages of the prototype, due to his second and third distinctive signs, are sufficient to find a new way to move the bucket rope quarry excavator.

The technical problem of the invention is to preserving the working equipment of the cable quarry excavator advantages of the method of forming the trajectory of the bucket, which changes the distance between the bucket and the axis of swing of the handle, substantially simplify the design IU is anima head, deletion of the kinematic pair with the translational motion of the connected links.

The technical problem is solved by forming the trajectory of the bucket rope quarry excavator with operation cast handle with bucket in swinging movement in a vertical plane in the coordinate system associated with the boom, with the axis of swing of the handle in this coordinate system is fixed, and by operation of the regulation of curvature of the trajectory by changing the distance between the bucket and the axis of swing of the handle, which is stationary in the coordinate system associated with the bolt, the axis of swing of the handle is moved in the coordinate system associated with the handle, along the arc of a circle whose center is at the end of a handle.

Working equipment to implement the foregoing method includes the boom, arm is rigidly mounted on the bucket, rope hoist bucket and the mechanism of pressure. The pressure mechanism includes a rocker arm forming a arrow and a handle rotational pairs, and the hydraulic cylinder, the piston rod and the housing of which is pivotally connected with a yoke and handle accordingly. Swivel rocker and the handle allows you to change in proportion to the moving rod of the hydraulic cylinder, the distance between the cutting edge of the bucket and the axis of the swivel rocker by castrelos.

In the proposed method, as in the famous implemented in the design of the analog method, the center of rotation of the handle fixed in the coordinate system associated with the main boom of the excavator, while in method implemented in the design of the prototype, this center of rotation is movable relative to the main boom. The similarity of the first two (proposed and implemented in the design of similar) ways is that, when the handle is moved relative to the boom in the coordinate system associated with the arrow changes the distance from the center of rotation of the handle to the tip of the bucket teeth that in the coordinate system associated with the handle, looks like the move a handle, and its center of rotation, in which the arrow is fixed. The difference between these two methods is that in the known method the specified move the center of rotation of the handle is straight-forward and the proposed method has the shape of an arc, the chord of which is equal to the length of this move. Therefore, implementation of the proposed method allows you to replace the engine head translational rotational kinematic pair and create a working equipment for cable quarry excavator, which has all the above advantages and analog prototype and has none of their fault.

For the delivery of the AI method is optimal linkage head (rocker, the handle and cylinder). Such a mechanism of power is universal, mounted on the boom and stick, and if the handle of the girder, respectively symmetrically on each beam is used to transfer large effort, relatively simple to manufacture, durable and more durable than rack-and-pinion mechanisms in the working equipment of the famous mining shovels.

This mechanism has minimal backlash, easy mobility and high reliability in overload, allows you to smoothly adjust the distance between the cutting edge of the bucket and the axis of swing of the handle due to the rotation of the rocker arm relative to the handle in proportion to the moving rod of the hydraulic cylinder, and rational use of hydraulic drive, which allows you to create great efforts with a smooth regulation of the movement of the piston rod of the hydraulic cylinder.

Swivel rocker and the handle allows you to change the distance between the cutting edge of the bucket and axis, on which the rocker is proportional to the moving rod of the hydraulic cylinder.

The proposed method changes the trajectory of the bucket allows, while maintaining the benefits of cable quarry excavator, to simplify the working of the equipment, namely the design of the boom, dipper and mechanism of pressure.

In figures 1 and 2 presents the career of the cable ek is cavator with working equipment, shaping the trajectory of the bucket, according to the invention, and figure 3 - move the swing axis 11 of the handle in the coordinate system associated with the handle.

Working equipment excavator (figures 1 and 2) contains: arrow 1, a handle 2 attached to it by the bucket 3, the cable lift mechanism 4 and the mechanism of the head 5. The pressure mechanism 5 includes a rocker arm 6, pivotally connected by its ends, arrow 1, and with the free end of the handle 2, and the hydraulic cylinder 8, body 9 which is connected pivotally to the handle 2, and the rod 10 pivotally connected with the arm 6. In the swivel connection between the handle 2, the rocker arm 6 and the cylinder 8 of these units forms a rigid structure in which the distance between the bucket 3, mounted on the handle 2, and the end of the rocker arm 6, pivotally connected to the boom 1 may vary with the movements of the rod 10 relative to the housing 9.

Working equipment for implementing the method according to the invention operates as follows. The trajectory of the bucket is formed from the sole of the face (figure 2), which sets the bucket 3, the handle 2 is held vertically, the rod 10 of the cylinder 8 is retracted into the housing 9. By means of the hydraulic mechanism of the head, extends the stem 10 of the cylinder 8 and is close to the linear movement of the bucket by an amount corresponding raschet the th depth of penetration of the teeth of the bucket in the breed. Powering the winch rope lifting mechanism 4, turn rigid structure (arm 2 - arm 6 - cylinder 8) around the axis of the cylindrical swivel rocker 6 arrow 1. When the bucket 3 is moved in a vertical plane on a circular path, and the teeth of the bucket 3 describe the trajectory of the cutting radius of curvature which is equal to the distance from the axis of rotation of the above-mentioned rigid structure to the teeth of the bucket 3. Bucket 3 is filled with the subsequent unloading of the vehicle or to the dump, and it is installed on the bottom of the face to perform the next cycle of digging.

The application of the present invention will improve the mechanism of the career head of cable excavator, as well as to simplify the construction boom and dipper.

1. The method of forming the trajectory of the bucket rope quarry excavator, including cast handle with bucket in swinging movement in a vertical plane in the coordinate system associated with the boom, with the axis of swing of the handle in this coordinate system is fixed, and the operation control of the curvature of the trajectory by changing the distance between the bucket and the axis of swing of the handle, characterized in that fixed in the coordinate system associated with the bolt, the axis of swing of the handle move in the CCW system is dint, associated with the handle, along the arc of a circle whose center is at the end of a handle.

2. Working equipment for implementing the method according to claim 1, including a bolt, a handle rigidly mounted on the bucket, rope hoist bucket and the mechanism of pressure, wherein the pressure mechanism includes a rocker arm, which forms an arrow and a handle rotational pairs, and the hydraulic cylinder, the piston rod and the housing of which is pivotally connected with a yoke and handle accordingly.



 

Same patents:

FIELD: mining.

SUBSTANCE: system includes bottom-hole, dumped and intermediate running fixed platforms connected by means of two running lines, two-sided bucket with V-bottom connected to each mast by means of hoisting-hauling line enveloping the corresponding sheave arranged between running lines with possibility of movement relative to each other together with running lines. Intermediate running fixed platform is equipped with two supporting sheaves of running lines and one supporting sheave of hoisting-hauling lines. Rotation axis of hoisting-hauling line sheave has the possibility of being moved along guide curves of running lines.

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9 dwg

FIELD: mining.

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Stripping aggregate // 2396394

FIELD: mining.

SUBSTANCE: invention refers to mining and can be implemented at open development of mineral deposits by non-transport system in complicated mining and geological conditions. The stripping aggregate consists of face and dumping non-rotary carrier platforms with masts interconnected with two running cables, and of a double-sided bucket with a bottom of V-shape coupled with each mast by means of a lift-and-drag cable enveloping a corresponding block installed between the running cables. The block of the face non-rotary platform is rigidly tied with the first running cable and is connected to the second running cable; it travels along this cable relative to the block of the non-rotary dumping carrier platform together with the second running cable. The block of the dumping non-rotary platform is rigidly tied with the second running cable and is connected to the first running cable; it travels along this cable relative to the block of the non-rotary face carrier platform together with the first running cable.

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10 dwg

FIELD: mining.

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2 cl, 1 dwg

FIELD: mining.

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22 cl, 13 dwg

FIELD: engines and pumps.

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1 dwg

FIELD: mine winding plants, particularly to lift skips and cages from deep mines and pits.

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2 cl, 4 dwg

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2 cl, 1 ex, 4 dwg

FIELD: opencast mining; quarry transport.

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5 dwg

FIELD: quarry transport.

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9 dwg

FIELD: open-cast mining.

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5 cl, 5 dwg

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2 cl, 6 dwg, 1 ex

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3 dwg

FIELD: mining industry, particularly open-cast mining, particularly to produce natural stone blocks from sheet deposits by open-cast mining.

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EFFECT: increased output, possibility to produce blocks from thin sheet deposits along with maintaining natural block volumes.

1 ex

FIELD: mining, particularly machines for obtaining, or the removal of, materials in open-pit mines.

SUBSTANCE: cutting drum has cylindrical body with drive and is connected to mining machine by posts. The cutting drum is provided with disc rolling cutters arranged on line of rolling contact and with conveying augers extending from both ends thereof to drum center. Coils of each conveying auger face each other to divide the drum into two symmetric halves. Side drum surface defined by imaginary disc rolling cutter races includes cylindrical part and conical parts tapering towards outer cutting drum ends and adjoining the cylindrical part. Cylindrical part length is not less than 0.25 of cutting length Hc of material to be separated from rock. Working side surfaces of disc rolling cutters having wedge cross-sections and arranged on both cutting drum body halves in central cutting part thereof face opposite directions. Working side surfaces of disc rolling cutters having wedge cross-sections and arranged in both conical drum body parts face drum center. Both outer ends of cutting drum body are provided with disc rolling cutters made as free-cutting bits having wedge cross-sections facing outside.

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8 cl, 5 dwg

FIELD: earth-moving equipment, particularly machines for ground cutting, pit excavation for hydraulic structure, large-scale object building, as well as for mineral deposit development.

SUBSTANCE: ditching and transportation rig comprises basic chassis connected with earth-moving module and with transportation-handling devices, which move ground in vertical and horizontal directions. Earth-moving module is made as bucket rotary drum secured by means of vertical and horizontal hinges, as well as control-rods to the basic chassis so that the bucket rotary drum may rotate in vertical and horizontal planes and overhanging length thereof may be changed. Device is provided with continuous-type conveyer unit made as auger system and as telescopic pipe pivotally connected with transportation-handling device, which move ground in horizontal direction. Horizontal auger is located inside bucket rotary drum and is offset with respect to drum axis so that auger axis is parallel to drum axis. The horizontal auger is transversal to inclined auger having lower end installed under outlet end of horizontal auger. Upper end of inclined auger is pivotally fastened to upper telescopic pipe section. Transportation-handling device, which moves ground in horizontal direction, is made as endless band installed on length-adjustable telescopic sliding frame, which may change ground displacement distance by means of tightening rollers. Rollers have pins installed at different heights sliding in telescopic frame grooves. The telescopic frame has flanging. Lower telescopic pipe section is provided with rotary hinge connected to telescopic frame flanging so that rotary hinge may perform longitudinal movement with respect to frame flanging. Transportation-handling device, which provides vertical ground movement is composite and made as continuous-type bucket bands mating each other in transfer points.

EFFECT: increased ability and speed of pit excavation, reduced costs of ground excavation and transportation outside the pit and provision of continuous technological cycle.

2 cl, 8 dwg

FIELD: transport engineering; quarry dump-trucks.

SUBSTANCE: invention relates to devices for lifting and lowering dump-trucks, namely, to complexes for lifting and lower dump-trucks at opencast mining. Proposed device for lifting dump-truck to flank of opencast contains, in addition to lifting line, lowering line parallel to lifting line, both lines being coupled by drive sprockets in head and middle parts of both lines. Each gripping device for gripping and transporting of dump-trucks up and down is made in form twin levers with rollers hinge-connected two leaf-and-roller chains and arranged in between to provide movement of roller along guides. Platform is secured on levers to arranged rear wheels of dumps-truck on lifting line and front wheels, on lowering line. Platform is arranged with clearances over tracks and on lifting line it is provided with curvilinear stop from side of tension sprocket for engagement with rear wheel of dump-truck, and on lowering line it is provided with two stops for arrangement of front wheels of dump-truck between the stops. Tracks on inclined sections are arranged to move front wheels on lifting line and rear wheels on lowering line at horizontal position of dump-trucks. Lips are arranged in opencast and on its flank in zones of entry of dump-trucks on lifting line and lowering line over tension and drive sprockets, and guides for traction chains and rollers of levers are made curvilinear to provide free getting of dump-truck wheels onto tracks.

EFFECT: provisions of lifting of loaded dump-trucks to flank of opencast and simultaneous lowering of empty-trucks into opencast at continuous transportation and reduced to minimum metal usage and energy consumption when carrying out said operation.

3 cl, 6 dwg

FIELD: transport engineering; quarry dump trucks.

SUBSTANCE: invention relates to devices for lifting and lowering dump-trucks when carrying out opencast mining. Proposed device for lifting dump-truck to flank of opencast contains, in addition of lifting line, a lowering line, both lines are parallel, being mechanically coupled by drive sprockets in head and middle parts of both lines. Each device for gripping and transporting of dump-trucks up and down is made in form twin levers with rollers hinge-connected to two leaf-and-roller chains and arranged in between for turning twin levers in vertical plane and moving rollers along guides arranged under guides for running rollers of traction chains. Twin levers are interconnected by platform to arrange front wheels of dump0truck. Platforms are arranged with clearances over tracks and are provided with curvilinear stop on lifting line from side of tension sprocket for engagement with front wheels of dump-truck and are made on lowering line with two stops to arranged front wheels of dump-truck between said stops. Cavities with inclined bottom to said of tension sprocket and wall square to surface of track are arranged on surface of lifting line track at definite step. Each platform of lifting line is furnished with shoe hinge-secured on platform symmetrically to longitudinal axis of lifting line for engagement of free end of shoe with surface of track at normal operation and, at break of traction chains, engagement of free end with wall of cavity, and free end of curvilinear form, with stop of platform.

EFFECT: provision of lifting loaded dump-trucks to flank of opencast and simultaneous lowering of empty-dump trucks into opencast with possibility of holding loaded dump-truck on lifting line in case of breaks of traction chains.

2 cl, 7 dwg

FIELD: quarry vehicles.

SUBSTANCE: invention relates to devices for lifting and lowering dump-trucks at opencast mining. Device is provided with dump-truck lowering line parallel to lifting line with drive sprockets in head and middle parts of both lines for mechanical engagement of said lines. Each gripping and up and down transporting device for dump-trucks is made ion form of twin levers with rollers of free ends hinge-connected to two leaf and-roller chains and arranged between said chains for turning twin levers in vertical plane and shifting rollers along guides arranged under guides for running rollers of traction chains. Twin levers are interconnected by platform for front wheels of dump-truck. Said platform are arranged with clearances over tracks, each being provided with curvilinear stop from side of tension sprockets on lifting line for engagement with front wheels of dump-truck and with two stops on lowering line for arranged of front wheels of dump-truck between said stops. Lips are made in quarry and on its flank in zones of entry of dump trucks on lifting and lowering lines over tension and drive sprockets. Guides for traction chains and lever rollers are made curvilinear to provide free getting of dump-trucks on track. Mechanical couplings of drive sprockets of both lines are made in form of reduction gear and toothed pair coupled with electric motor.

EFFECT: provision of lifting of loaded dump-trucks from quarry to opencast flank with simultaneous lowering of empty dump-trucks into quarry at continuous transportation, brought to minimum consumption of metal and energy at carrying out said operations.

3 cl, 6 dwg

FIELD: mining industry, particularly open cast mining.

SUBSTANCE: method involves loading tanks at lower horizon during tank unloading at upper horizon and lowering empty tanks from upper horizon during loaded tank lifting from lower horizon; providing additional sites for tank loading at lower horizon and corresponding additional sites for tank unloading at upper horizon; laying cable in zigzag manner so that the cable passes along loading and unloading sites and creates pulling branches; connecting tank with aerostat to each pulling branch. Tanks located at upper and lower horizons are fastened to next nearest branch so that distances between loading and unloading sited along the branches are equal one to another. Device for above method realization is also disclosed.

EFFECT: increased capacity.

2 cl, 2 dwg

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