CN214900108U - Automatic cable towing system of coal mining machine - Google Patents

Abstract

The utility model relates to an automatic towrope system of coal-winning machine, fall into upper, middle and lower three-layer with the layer board subassembly with the cable duct inner space, towrope dolly and bundle cage tow rope device's lower part is spacing in the middle level and can only follow cable duct length direction reciprocating sliding, it is fixed to restraint cage tow rope device coal-winning machine relatively, wire rope wears to establish and crosses along the length direction of cable duct, wire rope one end is walked around scraper conveyor's aircraft nose department fixed pulley and is connected with bundle cage tow rope device backward, the other end is walked around after the switching-over of tail department fixed pulley and is walked around the movable pulley of towrope dolly again and is returned the aircraft tail and fixed after switching-over once more, cable clamp plate group one end is connected on the coal-winning machine, the other end is fixed in aircraft nose department, the middle part is then walked around and is passed along cable duct length direction from towrope dolly's cylinder, the relative position of aircraft nose aircraft tail is interchangeable. The utility model discloses need not external input power, from the area direction, upper cable clamp plate group can not drop, and wire rope can not throw away, and the security is good.

Description

Automatic cable towing system of coal mining machine

Technical Field

The utility model relates to a coal-winning machine cable towing device especially relates to a need not the automatic cable towing device of coal-winning machine self-steering of external input power.

Background

The coal mining machine is electrically dragged on a coal mine working face to drag a power supply cable and a cooling water pipe to supply power to the coal mining machine and cool and reduce dust. The cable and the water pipe are generally arranged in a cable clamping plate group which is connected in series, and the cable and the water pipe pass through a cable groove of a scraper conveyor from the end of a working face and finally enter an electric cabinet and a water valve of a coal mining machine. One end of the cable clamping plate groups connected in series is fixed, and the other end of the cable clamping plate groups is connected with a cable towing device of the coal mining machine and is arranged along the whole working surface in the cable groove. The coal cutter drags the cable clamping plate group to move together in the process of walking back and forth on the working face to cut coal.

In the circulating coal cutting process of the coal mining machine from the machine head to the machine tail and from the machine tail to the machine head, at least three layers of overlapping of the cable clamping plate groups are inevitably generated on the part connected with the cable towing device of the coal mining machine. In the working face of the thin coal seam, the depth of the cable groove is generally shallow, and if three or more layers of cable clamping plate groups are stacked, the uppermost layer can easily fall out of the cable groove. On a large-inclination working surface, the uppermost layer of the cable clamping plate groups stacked with three or more layers is easy to fall out of the cable groove due to dead weight. When the cable clamping plate group wearing the cable and the water pipe falls out of the cable groove, the towing is continued, the equipment outside the cable groove is easily crushed by a traveling system of a coal mining machine, and if the equipment is continuously dragged, the power supply cable can be damaged, so that great potential safety hazards are caused. In addition, with the implementation and the promotion of the intelligent and unmanned working face of the fully mechanized mining working face, the automatic cable towing system of the coal mining machine is a core key technology which needs to be solved.

At present, an automatic towing system for independently providing power from the outside exists, but the automatic towing system needs to be additionally provided with a set of variable-frequency speed-regulating power system which has the same speed as the traction speed of a coal mining machine at the head and the tail of a scraper conveyor, so that the equipment cost is high, the installation is complex, the delay exists when the variable-frequency speed-regulating power system is matched with the same speed of the traction speed of the coal mining machine, and the actual using effect is poor. And a steel wire rope is directly connected with the coal mining machine and is also used as an unpowered system for pulling the towing mechanism, but the steel wire rope in a cable groove of the whole working surface of the system is exposed, so that great potential safety hazard is caused once the cable is broken, and the towing mechanism is free of a guide mechanism and has great resistance in pulling.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an automatic tow cable system of coal-winning machine need not external input power, but automatic direction, and the pulling resistance is little, and upper cable clamp plate group can not drop, and wire rope can not throw away, and the security is good.

The utility model discloses a main technical scheme has:

the utility model provides an automatic towrope system of coal-winning machine, includes towrope dolly, restraints cage and drags rope device, guider, fixed pulley, wire rope, cable clamp plate group and layered board subassembly, the layered board subassembly includes that totally enclosed plate and length direction are gone up the full length and are equipped with long and narrow open-ended semi-closed plate, and semi-closed plate and totally enclosed plate pass through threaded fastener one on the other and can dismantle fixed mounting in scraper conveyor's cable duct, semi-closed plate is formed by two plate combination front and back to fall into cable duct space upper and middle and lower three-layer, guider installs in the lower floor space of cable duct full length within range, towrope dolly is including the cylinder that is located the upper portion and walking leading truck and the movable pulley that are located the lower part, restraint cage and drag rope device is including being located the walking leading truck of upper portion and being located the lower part, towrope dolly and restraint cage drag rope device's walking leading truck are spacing in the middle level space of cable duct and can only follow the reciprocal smooth sliding of cable duct length direction The roller and the cable clamp group are positioned above the semi-closed plate, the fixed pulleys are arranged on the outer sides of two ends of a machine head and a machine tail of the scraper conveyor, the cable clamp group dragging device is fixedly connected with the machine body of the coal mining machine side by side, one end of the cable clamp group is connected to the machine body of the coal mining machine, the other end of the cable clamp group extends to the position of the machine head or the machine tail and is fixed relative to the machine head or the machine tail, the middle part of the cable clamp group bypasses the roller and penetrates through the cable trough along the length direction of the cable trough, the cable clamp group dragging device is closer to the other end of the cable clamp group than the cable trolley and the joint of the cable clamp group and the machine body of the coal mining machine, the steel wire rope penetrates through the lower space of the lower layer of the cable trough and passes through the lower part of the guide wheels of the guide device, and one end of the steel wire rope extends to the machine tail or the machine head after bypassing the fixed pulleys at the position of the machine head or the machine tail, the other end of the steel wire rope winds around the fixed pulley at the tail or the head to change direction and then extends to the head or the tail, then winds around the movable pulley of the towing trolley to change direction again and returns to the tail or the head and is fixed relative to the tail or the head, cables and water pipes of a coal mining machine are arranged in the cable clamping plate group in an extending mode, and the length of the cable clamping plate group meets the following requirements: when the coal mining machine is located at the starting point of the working face and the cable clamping plate group is in a tensioning state, the position of the axis of the roller deviates to the end point of the working face and the distance between the axis of the roller and the midpoint of the working face is not less than half of the length of the machine body of the coal mining machine.

The guide device is provided with a plurality of guide devices, and one guide device is arranged in each cable groove.

The guide device can further comprise a U-shaped piece and a fixed block, the guide wheel is rotatably supported on a wheel shaft through a bearing, two ends of the wheel shaft are installed on the fixed block, the fixed block is in an inverted U shape, the fixed block is fixed in the inverted U-shaped piece, and the inverted U-shaped piece is detachably suspended on the totally-enclosed plate.

Each guide device is provided with at least three guide wheels, the guide wheels are arranged at intervals along the length direction of the guide device, the guide wheels positioned at two end parts horizontally swing in a certain range relative to the U-shaped part, the guide wheels positioned at the middle part are fixed relative to the U-shaped part, and the axis of the guide wheels extends along the width direction of the guide device.

The walking guide frame can include two parallel arrangement's in front and back bar bodies, and both ends set up into the quadrangular pyramid shape about the bar body.

The roller is arranged on the rib plate, and the rib plate is fixedly connected with the walking guide frame through a pin and a screw.

The fixed pulley is preferably a fixed pulley provided with a closed shell.

The automatic cable towing system of the coal mining machine further preferably comprises an extension spring, and the lower part of the beam cage towing rope device is indirectly connected with the steel wire rope through the extension spring.

The utility model has the advantages that:

the utility model discloses the space is compact, it is convenient to install and remove, will restraint cage tow rope device and tow cable dolly to connect through wire rope, its cable clamp group of tow cable system drags with the syntropy with the speed along with it when having realized that coal-winning machine pulls the walking, make cable clamp group keep the two-layer state of stretching all the time, the fault outside the cable duct has very easily fallen to cable clamp group the superiors when having avoided cable clamp group stack three-layer and above on thin seam working face and the big inclination working face effectively, establish the basis for coal-winning machine intellectuality and unmanned working face development simultaneously.

The utility model discloses a cable clamp plate group forms two-layer from top to bottom, and it passes to compare one deck cable clamp plate group restraint the cage, on the one hand restraint the cage and can smooth out this layer of cable clamp plate group of straightening, on the other hand restraint the cage and can clear up foreign matter such as the other coal cinder of this layer of cable clamp plate group. Meanwhile, the lower layer of cable clamp plate group has a sealing effect on the steel wire rope behind the advancing direction of the coal mining machine, and the steel wire rope is unlikely to throw out in case of breakage, so that the injury to operators following behind the coal mining machine can be avoided.

Because the guide device and the fixed pulley with the closed structure are adopted, the steel wire rope at the lower layer and at the machine head and the machine tail during reversing is basically sealed, and the abrasion of the steel wire rope moving relatively to other pipelines and equipment is avoided.

The lower part of the beam cage dragging device is indirectly connected with the steel wire rope through the extension spring, so that the steel wire rope can keep a certain tension degree on one hand, and the length change of the steel wire rope can be compensated when the coal mining machine performs beveling and cutting on the other hand.

Drawings

Fig. 1 is a schematic view of an installation structure of an embodiment of the layered plate assembly of the present invention;

fig. 2 is a schematic structural view of an embodiment of the guide device of the present invention;

fig. 3 is a schematic structural diagram of an embodiment of the rope tying device according to the present invention;

fig. 4 is a schematic view of an installation state of the cage restraining towing rope device of the present invention;

FIG. 5 is a schematic structural view of one embodiment of the streamer cart of the present invention;

FIG. 6 is a schematic view of the installation state of the towing trolley of the present invention;

FIG. 7 is a view from the P direction of FIG. 6;

FIG. 8 is a schematic view of the installation of the extension spring;

fig. 9 is a system diagram of arrangement and orientation of the cable clamping plate group of the present invention;

FIG. 10 is an illustration of the operation of the present invention when the coal mining machine is left towed;

fig. 11 is an explanatory diagram of the working process of the present invention when the coal mining machine is towed to the right.

Reference numerals:

1. towing the cable car; 1-1. a roller; 1-2, a walking guide frame; 1-3, a movable pulley; 2. a cage-binding towing rope device; 2-1, bundling a cage; 2-2, a walking guide frame; 2-3, ear seat; 3. a guide device; 3-1, a guide wheel; 3-2. a U-shaped piece; 3-3, fixing blocks; 4. a fixed pulley; 5. a wire rope; 6. a cable trough; 7. a cable clamp group; 8-1, a fully-enclosed plate; 8-2, semi-closed plate; 9. a shaft extension connecting device; 10. an extension spring; 11. a coal mining machine.

Detailed Description

The utility model discloses an automatic towrope system of coal-winning machine (can be called for short automatic towrope system), as shown in fig. 1-11, including towrope dolly 1, restraint cage tow rope device 2, guider 3, fixed pulley 4, wire rope 5, cable clamp plate group 7 and layered board subassembly, the full length is equipped with long and narrow open-ended semi-closed board 8-2 on the layered board subassembly includes totally-closed board 8-1 and the length direction, and semi-closed board can be formed by two board combinations around, and semi-closed board and totally-closed board can dismantle fixed mounting in the cable duct 6 of the scraper conveyor of the 11 old ponds sides of coal-winning machine one on the other to fall into the horizontal three-layer from top to bottom with the cable duct inner space, the lower floor is closed, and the middle level is semi-closed, and the upper strata is open. The middle layer and the upper layer are communicated through the long and narrow opening. The full-closed plate and the semi-closed plate can be fixed on the cable groove through screws and the like, and are convenient to disassemble, assemble and replace. The guiding device is arranged in the lower layer space in the full-length range of the cable groove. The towing trolley comprises a roller 1-1 positioned at the upper part and used for dragging the cable clamping plate group, a walking guide frame 1-2 positioned at the lower part and a movable pulley 1-3. The cage binding dragging rope device comprises a cage binding 2-1 positioned at the upper part and a walking guide frame 2-2 positioned at the lower part. The bundle cage is a cylindrical structure penetrating in the length direction of the cable trough. The traveling guide frames 1-2 and 2-2 of the towing trolley and the cable bundling cage towing device are both limited in the middle-layer space of the cable groove and can only slide back and forth along the length direction of the cable groove, the joint of the upper part and the lower part of each of the towing trolley and the cable bundling cage towing device penetrates through the long and narrow opening in the semi-closed plate, and the traveling guide frames are always positioned in the middle-layer space of the cable groove in the height direction. The roller and the bunching cage are both positioned above the semi-closed plate. The towing trolley is mainly used for towing the cable clamp plate group and assisting in towing the steel wire rope, and the bundle cage towing device is mainly used for towing the steel wire rope and straightening the cable clamp plate group.

The fixed pulleys are arranged on the outer sides of the two ends of the machine head and the machine tail of the scraper conveyor. The cage-binding dragging rope device is fixedly connected side by side relative to the body of the coal mining machine and synchronously reciprocates under the drive of the coal mining machine. One end of the cable clamping plate group is connected to a body of the coal mining machine, generally to a towing device of the coal mining machine, the other end of the cable clamping plate group extends to the position of the head (or tail) and is fixed relative to the head (or tail), and the middle part of the cable clamping plate group bypasses the roller 1-1 and horizontally penetrates through the bundling cage 2-1 along the length direction of the cable trough. The cable clamping plate group is reversed from the roller, and the cable clamping plate group is kept horizontal as much as possible except for the reversing position. The cable clamp plate group forms an upper layer of cable clamp plate group from one end to the roller, and a lower layer of cable clamp plate group passes through the bundling cage relatively. Compared with a towing trolley and the joint of the cable clamping plate group and the coal mining machine body, the cable-restraining cage towing rope device is closer to the other end of the cable clamping plate group.

And the steel wire rope horizontally penetrates through the lower space of the cable groove and penetrates through the lower part of the guide wheel 3-1 of the guide device, and the steel wire rope integrally keeps horizontally and linearly extending along the length direction of the cable groove under the guide action of the guide wheel. One end of the steel wire rope rounds the fixed pulley at the head (or tail) to be reversed and then extends to the tail (or head), and is connected with the lower part of the bundle cage towing rope device, such as a walking guide frame 2-2, the other end of the steel wire rope rounds the fixed pulley at the tail (or head) to be reversed and then extends to the head (or tail), and then rounds the movable pulley 1-3 of the towing trolley to be reversed again and then returns to the tail (or head) and is fixed relative to the tail (or head). The end parts of the cable clamping plate group and the steel wire rope fixed relative to the scraper conveyer are positioned at the head of the scraper conveyer and at the tail of the scraper conveyer. When the beam cage towing rope device moves towards the tail (or the head) direction along with the coal mining machine, the towing trolley also moves towards the tail (or the head) direction.

The coal mining machine cable and the water pipe are arranged in the cable clamping plate group in an extending mode. The binding cage penetrates through the binding cage compared with the next layer of cable clamping plate group, the binding cage can straighten the layer of cable clamping plate group on one hand, and the binding cage can clean foreign matters such as coal blocks and the like beside the layer of cable clamping plate group on the other hand. The lower layer of cable clamp plate group has a sealing effect on the steel wire rope behind the advancing direction of the coal mining machine, and the steel wire rope cannot be thrown out in case of breakage, so that the injury to operators following the machine behind the coal mining machine can be avoided.

The length of the cable clamping plate group meets the following requirements: when the coal mining machine is located at the starting point of the working face and the cable clamping plate group is in a tensioning state, the position of the axis of the roller deviates to the end point of the working face and the distance between the axis of the roller and the midpoint of the working face is not less than half of the length of the machine body of the coal mining machine.

The automatic cable towing system is installed on a cable trough of a scraper conveyor on the side of an old pond of a coal mining machine, is convenient to install and easy to disassemble, can be installed when the automatic cable towing system is used, and can be detached when the automatic cable towing system is not convenient to use.

The guide device is provided with a plurality of guide devices, preferably one guide device is arranged in each cable groove, so that the guide devices can be distributed over the whole length of the cable groove and can guide the steel wire rope along the whole cable groove. The guiding device is arranged at the front and rear middle positions of the lower layer of the cable groove.

The guide device can also comprise a U-shaped part 3-2 and a fixed block 3-3 besides the guide wheel, the guide wheel 3-1 is rotatably supported on a wheel shaft through a bearing, two ends of the wheel shaft are installed on the fixed blocks, the fixed blocks are fixed in the inverted U-shaped part, and the inverted U-shaped part is detachably suspended and installed on the totally-enclosed plate. The U-shaped piece can be made of channel steel. In this embodiment, the U-shaped member and the fixing block are both in the shape of an inverted U, which serves to enclose the steel cable guided by the guide wheel.

Further, each guide device is provided with at least three guide wheels, the guide wheels are arranged at intervals along the length direction of the guide device (also the length direction of the U-shaped part), two guide wheels at two end parts have certain horizontal swinging freedom degree relative to the U-shaped part, the wheel shaft corresponding to the guide wheel at the middle part and the fixed block are preferably installed in a tight fit mode, and the axis of each guide wheel horizontally extends along the width direction of the guide device.

The guide wheel has a certain degree of freedom of horizontal swinging relative to the U-shaped part and can be realized in the following two ways: (1) the fixed block is provided with a plurality of pairs of shaft holes for mounting the wheel shafts at intervals along the length direction of the guide device, wherein the shaft holes closest to the two end parts are waist-shaped holes extending along the length direction of the guide device, and other shaft holes are round holes. (2) Each guide wheel corresponds to one fixed block, and two ends of a wheel shaft of each guide wheel are fixedly arranged on the corresponding fixed blocks. The tops of the two fixing blocks closest to the two end parts are horizontally and rotatably connected relative to the U-shaped part, the fixing blocks can horizontally swing only within a certain angle range by arranging limiting devices, and for example, a sliding bearing sleeve can be arranged between the fixing blocks and the U-shaped part for limiting.

When two adjacent middle grooves of the scraper conveyor are horizontally bent, the corresponding horizontal bending between the two adjacent cable grooves and between the U-shaped parts of the two adjacent guide devices is synchronously caused, and the horizontal deflection of the guide wheels at the two ends of the guide devices can partially or even completely offset the influence of the bending of the middle grooves on the guide of the guide wheels at the two ends of the guide devices on the steel wire rope, so that the steel wire rope is prevented from being obliquely pulled in the guide wheels or the deflection amplitude is reduced as much as possible.

The walking guide frame can comprise a front strip-shaped body and a rear strip-shaped body which are arranged in parallel, such as a cuboid, the left end and the right end of each strip-shaped body are preferably arranged into a quadrangular pyramid shape, and the walking guide frame is used for guiding the towing trolley or the rope bundling cage towing device in the left-right reciprocating sliding process.

The axes of the rollers on the streamer trolley are preferably arranged horizontally one behind the other, and their height and roller diameter are preferably arranged so that the cable clamp groups remain horizontal both before and after passing around the rollers. The axis of the movable pulley can be arranged in the vertical direction, and the movable pulley is preferably arranged between the front strip body and the rear strip body of the walking guide frame on the towing trolley. Because the movable pulley is arranged at a reasonable position, when the steel wire rope winds from the movable pulley to pull the towing trolley, the steel wire rope has good stress position and is easy to pull. The roller can be arranged on a ribbed plate, and the ribbed plate and the walking guide frame can be positioned by a pin and are in fastening connection by a screw.

The upper part and the lower part of the bundle cage towing rope device can be positioned through a pin and are fixedly connected through a screw. In the embodiment, the top of the cage binding dragging rope device is also provided with lug seats 2-3, and the lug seats are fixedly connected with the body of the coal mining machine through a shaft extension connecting device 9. In this embodiment, the shaft extension connecting device 9 is connected between the lug seat and a traveling box of the coal mining machine, and the cage binding dragging rope device horizontally moves at the same speed along with the coal mining machine in the length direction of the working face.

The fixed pulley is preferably a fixed pulley provided with a closed shell.

The elongated opening is in this embodiment centrally located in the width direction of the cable trough. Correspondingly, the towing trolley and the bundle cage towing rope device are arranged in a front-back symmetrical structure. The joint of the upper part and the lower part of each of the towing trolley and the bundle cage towing rope device penetrates through the long and narrow opening.

The automatic cable towing system of the coal mining machine further comprises an extension spring 10, and the lower part of the beam cage towing rope device is indirectly connected with the steel wire rope through the extension spring. Correspondingly, the lower part of the bundle cage dragging rope device can be also provided with an ear seat for connecting an extension spring. The tightness of the steel wire rope is adjusted by the tension spring.

When the coal mining machine walks, the bunching cage dragging rope device, the extension spring, the steel wire rope and the towing trolley which are sequentially connected are driven, so that the cable clamping plate group which surrounds the roller of the towing trolley is pulled to move together with the coal mining machine at the same direction and the same speed, and the cable clamping plate group is always kept in a two-layer tight state. Because the traction power of the coal mining machine is used as the power of the automatic cable towing system, the situation that a huge variable frequency speed regulating mechanism with the same speed as the traction speed of the coal mining machine is arranged in a roadway corresponding to the machine head and the machine tail is avoided, and the cost of equipment can be greatly reduced.

As shown in fig. 10, when the coal mining machine is pulled leftwards, the cage-binding towing rope device fixedly connected with the traveling box of the coal mining machine and the like is pulled leftwards at the same speed with the coal mining machine, and the cage-binding towing rope device pulls the upper layer steel wire rope to move leftwards through the extension spring. The lower layer steel wire rope moves rightwards through a guide device below the cable groove, the steel wire rope reverses at the end of the left end roadway and then pulls the towing trolley to move leftwards through a movable pulley on the towing trolley, and the towing trolley pulls the upper layer cable clamping plate group to move leftwards.

As shown in fig. 11, when the coal mining machine is towed to the right, the coal mining machine pulls the towing trolley surrounding the double-layer cable clamping plate group to move to the right by pulling the upper-layer cable clamping plate group, the steel wire rope surrounding the movable pulley on the towing trolley moves along with the towing trolley, the lower-layer steel wire rope is pulled to move to the left, the cable-tying cage towing device is pulled by the tension spring to move to the right at the same speed as the coal mining machine, and the system circulation is kept.

Claims (10)

1. The utility model provides a coal-winning machine automatic cable towing system which characterized in that: the towing trolley comprises a towing trolley, a bundling cage towing rope device, a guiding device, a fixed pulley, a steel wire rope, a cable clamp plate group and a layered plate component, wherein the layered plate component comprises a full-closed plate and a semi-closed plate with a long and narrow opening arranged in the full length direction, the semi-closed plate and the full-closed plate are fixedly installed in a cable groove of a scraper conveyor in a detachable mode one on the other through threaded fasteners, the semi-closed plate is formed by combining a front plate and a rear plate and divides the space in the cable groove into an upper layer, a middle layer and a lower layer, the guiding device is installed in a lower layer space in the full length range of the cable groove, the towing trolley comprises a roller positioned on the upper portion, a walking guide frame positioned on the lower portion and a movable pulley, the bundling cage towing rope device comprises a bundling cage positioned on the upper portion and a walking guide frame positioned on the lower portion, the walking guide frames of the towing trolley and the bundling cage towing rope device are limited in the middle layer space of the cable groove and can slide back and forth along the length direction of the cable groove, the roller and the bundling cage are both positioned above the semi-closed plate, the fixed pulleys are arranged on the outer sides of two ends of a machine head and a machine tail of the scraper conveyor, the bundling cage dragging device is fixedly connected with the machine body of the coal mining machine side by side, one end of the cable clamping plate group is connected with the machine body of the coal mining machine, the other end of the cable clamping plate group extends to the position of the machine head or the machine tail and is fixed relative to the machine head or the machine tail, the middle part of the cable clamping plate group bypasses the roller and penetrates through the bundling cage along the length direction of a cable groove, the bundling cage dragging device is closer to the other end of the cable clamping plate group than the towing trolley and the joint of the cable clamping plate group and the machine body of the coal mining machine, the steel wire rope penetrates through the lower part of the guide wheel of the guide device when penetrating through the lower layer space of the cable groove, one end of the steel wire rope bypasses the fixed pulleys at the position of the machine head or the machine tail and then extends to the machine tail or the machine head after reversing, the other end of the steel wire rope winds around the fixed pulley at the tail or the head to change direction and then extends to the head or the tail, then winds around the movable pulley of the towing trolley to change direction again and returns to the tail or the head and is fixed relative to the tail or the head, cables and water pipes of a coal mining machine are arranged in the cable clamping plate group in an extending mode, and the length of the cable clamping plate group meets the following requirements: when the coal mining machine is located at the starting point of the working face and the cable clamping plate group is in a tensioning state, the position of the axis of the roller deviates to the end point of the working face and the distance between the axis of the roller and the midpoint of the working face is not less than half of the length of the machine body of the coal mining machine.

2. The shearer automatic streamer system of claim 1, wherein: the guide device is provided with a plurality of guide devices, and one guide device is arranged in each cable groove.

3. The shearer automatic streamer system of claim 2, wherein: the guide device further comprises a U-shaped piece and a fixed block, the guide wheel is rotatably supported on a wheel shaft through a bearing, two ends of the wheel shaft are installed on the fixed block, the fixed block is in an inverted U shape, the fixed block is fixed in the inverted U-shaped piece, and the inverted U-shaped piece is detachably suspended and installed on the totally-enclosed plate.

4. The shearer automatic streamer system of claim 3, wherein: each guide device is provided with at least three guide wheels, the guide wheels are arranged at intervals along the length direction of the guide device, the guide wheels positioned at two end parts horizontally swing in a certain range relative to the U-shaped part, the guide wheels positioned at the middle part are fixed relative to the U-shaped part, and the axis of the guide wheels extends along the width direction of the guide device.

5. The shearer automatic streamer system of claim 1, wherein: the walking guide frame comprises a front strip body and a rear strip body which are arranged in parallel, and the left end and the right end of each strip body are arranged into a quadrangular pyramid shape.

6. The shearer automatic streamer system of claim 5, wherein: the roller is arranged on the rib plate, and the rib plate is fixedly connected with the walking guide frame through a pin and a screw.

7. The shearer automatic streamer system of claim 1, wherein: the top of the cage binding dragging rope device is provided with an ear seat, and the ear seat is fixedly connected with the body of the coal mining machine through a shaft extension connecting device.

8. The shearer automatic streamer system of claim 1, wherein: the fixed pulley is provided with a closed shell.

9. The shearer automatic streamer system of claim 1, wherein: the elongated opening is centrally located in the width direction of the cable trough.

10. The shearer automatic streamer system of claim 1, 2, 3, 4, 5, 6, 7, 8, or 9, wherein: the lower part of the bundle cage dragging rope device is indirectly connected with the steel wire rope through the extension spring.

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