Safety protection coal mine support

Abstract

The invention relates to the technical field of coal mine supports, and discloses a safety protection coal mine support which comprises a top coal caving hydraulic support body and a tail beam, the tail beam is hinged to one side of the top coal caving hydraulic support body, and a crushing groove is formed in one side of the tail beam; according to the top coal caving hydraulic support, by arranging the transmission mechanism, after a jack in the top coal caving hydraulic support body controls a tail beam to swing, a coal falling opening is formed in one side of the tail beam at the moment, top coal can fall from the coal falling opening, meanwhile, a motor is started, the motor drives a first bevel gear and a lead screw to rotate, and the lead screw rotates and rotates a transmission block at the same time; the transmission block reciprocates along the tracks of the sliding block and the sliding groove, the ejector pin reciprocates synchronously with the transmission block, when large coal briquettes pass through the coal falling opening, the ejector pin pierces into the large coal briquettes, the coal briquettes are broken and split into small coal briquettes, the coal falling opening is effectively prevented from being blocked by the large coal briquettes, and therefore the coal mining efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mine support, in particular to a safe coal mine support. BACKGROUND

[0002] A coal mine is an area where coal resources are mined in a coal-rich mining area. It is generally divided into underground coal mines and open-pit coal mines. When the coal seam is far from the ground surface, a roadway is generally excavated underground to mine coal, which is an underground coal mine. When the distance between the coal seam and the ground surface is very close, the ground surface soil layer is directly stripped to excavate coal, which is an open-pit coal mine. In order to ensure safety during coal mining, a top coal caving hydraulic support is generally used for protection and support.

[0003] After searching, a top coal caving hydraulic support rear coal cleaning device is disclosed in Chinese patent literature

publication number: CN220015166U

[0004] During coal mining, multiple top coal caving hydraulic supports are used to be spliced together. When the coal is released, the tail beam is swung downward by the jack to form a coal drop opening. At this time, the loose top coal will fall into the scraper conveyor through the coal drop opening, and the collection of the top coal is completed. The existing top coal caving hydraulic support only uses the swinging mode of the tail beam to realize the crushing effect of the coal blocks. Some coal blocks with large size are still easy to block in the coal drop opening, which causes the top coal to be unable to fully fall, and part of the coal exists in the goaf, thereby affecting the efficiency of coal mining.

[0005] To solve this problem, we propose a safe coal mine support. SUMMARY

[0006] The purpose of the present application is to provide a safe coal mine support to solve the problems raised in the background art.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a safety protection coal mine support, comprising a top coal caving hydraulic support body and a tail beam, the tail beam being hinged to one side of the top coal caving hydraulic support body, a crushing groove being provided on one side of the tail beam, two crushing rollers being provided inside the crushing groove, a transmission groove being provided inside the transmission groove, an ejector pin being provided inside the transmission groove, and a receiving groove being provided on one side of the tail beam for use in conjunction with the ejector pin;

[0008] The transmission mechanism is fixedly arranged on the tail beam and can control the ejector pin to move back and forth to pierce the coal block and break it into pieces when the coal block passes through the coal drop port;

[0009] The transmission mechanism includes a motor fixedly arranged on one side of the tail beam, the output end of the motor passes through the interior of the transmission groove and is fixedly connected to a first bevel gear, one side of the first bevel gear is fixedly connected to a screw rod, the surface of the screw rod is transmission-connected to a transmission block, and one side of the transmission block is fixedly connected to one end of the ejector pin.

[0010] Preferably, it further comprises a crushing mechanism, wherein the crushing mechanism is fixedly arranged on the crushing roller and can control the two crushing rollers to rotate;

[0011] The crushing mechanism includes a transmission rod fixedly arranged on one side of the crushing roller, a second bevel gear is meshedly connected to one side of the first bevel gear, a first double-groove transmission wheel is fixedly connected to the bottom of the second bevel gear, the top of the transmission rod passes through the interior of the transmission groove and is fixedly connected to the second double-groove transmission wheel, and the first double-groove transmission wheel and the second double-groove transmission wheel are connected by belt transmission.

[0012] Preferably, it further comprises a vibration mechanism, wherein the vibration mechanism is fixedly arranged on the second double-groove transmission wheel, and can knock the tail beam to generate vibration when the crushing roller rotates;

[0013] The vibration mechanism includes a cam fixedly arranged on one side of the second double-groove transmission wheel, an extrusion block is provided on one side of the cam, a traction rod is fixedly connected to one side of the extrusion block, one end of the traction rod passes through one side of the tail beam and is fixedly connected to a linkage block, one side of the linkage block is fixedly connected to a knocking rod, a tension spring is provided on the surface of the traction rod, one end of the tension spring is fixedly connected to one side of the linkage block, and the other end of the tension spring is fixedly connected to one side of the tail beam.

[0014] Preferably, it further comprises a self-cleaning mechanism, wherein the self-cleaning mechanism is fixedly arranged on the linkage block;

[0015] The self-cleaning mechanism includes a connecting block fixedly connected to one side of the linkage block, one side of the connecting block is fixedly connected to a compression box, one side of the compression box is fixedly connected to one side of the tail beam, the top of the compression box is fixedly connected to an air intake pipe, one side of the compression box is fixedly connected to an exhaust pipe, and one side of the exhaust pipe passes through the interior of the crushing tank;

[0016] A pushing block is provided inside the compression box, one side of the pushing block is fixedly connected to a pushing rod, one end of the pushing rod passes through one side of the compression box and is fixedly connected to one side of the connecting block.

[0017] Preferably, a one-way valve is fixedly installed on the surface of the intake pipe, and a one-way pressure valve is fixedly installed on the surface of the exhaust pipe.

[0018] Preferably, a piston plate is fixedly connected to one side of the pushing block, and the outer surface of the piston plate is in contact with the inner wall of the compression box.

[0019] Preferably, one end of the knocking rod is fixedly connected to a conical buffer block, and one side of the conical buffer block is fixedly connected to a rubber pad.

[0020] Preferably, sliding blocks are fixedly connected to both sides of the transmission block, and the inner wall of the transmission groove is provided with a sliding groove used in conjunction with the sliding blocks.

[0021] Preferably, one side of the first double-groove transmission wheel is rotatably connected to the inner wall of the transmission groove through a first bearing, and one side of the second double-groove transmission wheel is rotatably connected to the inner wall of the transmission groove through a second bearing.

[0022] Preferably, one end of the ejector pin is tapered, and there are several ejector pins.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention provides a transmission mechanism. After the tail beam is controlled to swing by the jack in the main body of the top coal hydraulic support, a coal drop-out port is formed on one side of the tail beam, and the top coal falls through the drop-out port. At the same time, the motor is started, which drives the first bevel gear and the screw to rotate. The rotation of the screw also rotates the transmission block, causing the transmission block to reciprocate along the trajectory of the sliding block and the sliding groove. The ejector pin synchronizes the reciprocating movement of the transmission block. When a large coal block passes through the drop-out port, the ejector pin penetrates the interior of the large coal block, breaking it into small pieces, effectively preventing the large coal block from clogging the drop-out port, thereby improving coal mining efficiency.

[0025] 2. The present invention is provided with a crushing mechanism, which can drive the second bevel gear to rotate while the first bevel gear rotates. The first double-groove transmission wheel will synchronize with the second bevel gear to rotate around the first bearing. At the same time, the first double-groove transmission wheel will also drive the second double-groove transmission wheel to rotate through the belt. The transmission rod and the crushing roller will also rotate synchronously. As the crushing roller rotates, it will perform secondary crushing on the large coal blocks pierced by the ejector pin, effectively splitting them into small coal blocks, avoiding blockage, and further improving the efficiency of coal mining.

[0026] 3. The present invention is provided with a vibration mechanism, which can drive the cam to rotate when the second double-groove transmission wheel rotates. When the protruding end of the cam contacts the extrusion block, the traction rod and the linkage block will move to the side away from the cam due to the extrusion, and at the same time drive the tension spring to a stretched state. When the cam rotates to no longer contact the extrusion block, the tension generated by the tension spring will drive the linkage block to reset suddenly, and the knocking rod will move synchronously, and at the same time drive the conical buffer block and the rubber pad to knock on the tail beam. The cycle is repeated, and the intermittent knocking will generate vibration force to shake off the coal blocks adhering to the surface of the tail beam, effectively avoiding blockage of the coal drop port and further improving the efficiency of coal mining.

[0027] 4. The present invention is provided with a self-cleaning mechanism. When the linkage block moves back and forth, when the linkage block moves to the right, the linkage block will drive the connecting block, the push rod, the push block and the piston plate to move to the right. At this time, the compression box is under negative pressure, and the gas will enter the compression box through the air inlet pipe. When the linkage block moves to the left, it will drive the connecting block, the push rod, the push block and the piston plate to move to the left, squeezing the gas in the compression box. When the gas in the compression box reaches the limit of the one-way pressure valve, the gas will be ejected from the exhaust pipe and blown towards the crushing roller, blowing off the coal slag adhered to its surface, thereby improving the effect of subsequent crushing and further improving the efficiency of coal mining. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the three-dimensional structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention from a side view;

[0030] Figure 3 Schematic diagram of the tail boom section of the present invention;

[0031] Figure 4 A perspective view of a cross-section of the tail boom in the present invention;

[0032] Figure 5 For the present invention Figure 4 A partial enlarged view of point A in the middle;

[0033] Figure 6 It is a three-dimensional diagram of the local structure of the present invention;

[0034] Figure 7 Figure 1 is a perspective view of a transmission mechanism in the present application;

[0035] Figure 8 Figure 2 is a perspective view of a crushing mechanism in the present application;

[0036] Figure 9 Figure 3 is a perspective view of a vibrating mechanism in the present application;

[0037] Figure 10 Figure 4 is a perspective view of a sectional view of a compression box in the present application;

[0038] Figure 11 Figure 5 is a schematic diagram of a moving track of a partial structure in the present application.

[0039] In the figure: 1, a top coal caving hydraulic support body; 2, a tail beam; 3, a crushing groove; 4, two crushing rollers; 5, a transmission groove; 6, a top pin; 7, a storage groove; 8, a motor; 9, a first bevel gear; 10, a lead screw; 11, a transmission block; 12, a transmission rod; 13, a second bevel gear; 14, a first double-groove transmission wheel; 15, a second double-groove transmission wheel; 16, a belt; 17, a cam; 18, a pressing block; 19, a traction rod; 20, a linkage block; 21, a knocking rod; 22, a tension spring; 23, a connecting block; 24, a compression box; 25, an air inlet pipe; 26, an air outlet pipe; 27, a pushing block; 28, a pushing rod; 29, a one-way valve; 30, a one-way pressure valve; 31, a piston plate; 32, a conical buffer block; 33, a rubber pad; 34, a sliding block; 35, a sliding groove; 36, a first bearing; 37, a second bearing. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0041] Please refer to Figure 1 - Figure 11 as shown,

[0042] Embodiment one:

[0043] A safe and protective coal mine support comprises a top coal caving hydraulic support body 1 and a tail beam 2, the tail beam 2 is hinged to one side of the top coal caving hydraulic support body 1, a crushing groove 3 is formed on one side of the tail beam 2, two crushing rollers 4 are arranged in the crushing groove 3, a transmission groove 5 is formed in the tail beam 2, a top pin 6 is arranged in the transmission groove 5, and a storage groove 7 is formed on one side of the tail beam 2 and cooperates with the top pin 6;

[0044] The transmission mechanism is fixedly arranged on the tail beam 2, and can control the reciprocating movement of the ejector pin 6 to pierce the coal block and make the coal block be broken and split when the coal block passes through the coal falling port.

[0045] The transmission mechanism comprises a motor 8 fixedly arranged on one side of the tail beam 2, an output end of the motor 8 penetrating into the inside of the transmission groove 5 and being fixedly connected with a first bevel gear 9, one side of the first bevel gear 9 being fixedly connected with a lead screw 10, the surface of the lead screw 10 being drivingly connected with a transmission block 11, one side of the transmission block 11 being fixedly connected with one end of the ejector pin 6.

[0046] In the embodiment, considering that the existing top coal caving hydraulic support body 1 only realizes the breaking of the coal block by swinging the tail beam 2, some large coal blocks are still easy to be blocked in the coal falling port, the top coal cannot be fully caved, part of the coal exists in the goaf, and thus the efficiency of coal mining is affected, therefore, by arranging the transmission mechanism, the tail beam 2 can be swung to the state by the control of the jack in the top coal caving hydraulic support body 1 Figure 1 At this time, one side of the tail beam 2 forms the coal falling port, the top coal falls from the coal falling port, at the same time, the motor 8 is started, the motor 8 drives the first bevel gear 9 and the lead screw 10 to rotate, the lead screw 10 rotates and drives the transmission block 11 to rotate, the transmission block 11 reciprocates along the track of the sliding block 34 and the sliding groove 35, and the ejector pin 6 reciprocates synchronously with the transmission block 11, when the large coal block passes through the coal falling port, the ejector pin 6 pierces into the inside of the large coal block, the coal block is broken and split into small coal blocks, the coal falling port is not blocked by the large coal block, and thus the efficiency of coal mining is improved.

[0047] It should be noted that how the top coal caving hydraulic support controls the tail beam 2 to swing to form the coal falling port is common knowledge of those skilled in the art, and thus will not be described in detail.

[0048] At the same time, the length of the ejector pin 6 extending into the coal falling port during the operation of the ejector pin 6 does not affect the normal falling of the ordinary coal block, and the situation that the ejector pin 6 enters the coal falling port to cause the blockage does not need to be considered.

[0049] One end of the ejector pin 6 is conical, and the number of the ejector pin 6 is several.

[0050] In the embodiment, one side of the ejector pin 6 is arranged to be conical, so that the ejector pin 6 can easily pierce into the inside of the large coal block during the reciprocating movement, and the large coal block is more easily broken and split into small coal blocks.

[0051] Embodiment two:

[0052] On the basis of embodiment one, the transmission mechanism in this embodiment can control the reciprocating movement of the ejector pin 6. When the large coal block falls, the ejector pin 6 pierces into the interior of the large coal block, breaks and splits it, avoids the blockage of the coal falling port, and further improves the efficiency of coal mining. However, considering that only the piercing of the ejector pin 6 into the interior of the large coal block occasionally causes the coal block to adhere and cannot be split, the application also includes a crushing mechanism fixedly arranged on the crushing roller 4 and capable of controlling the rotation of the two crushing rollers 4.

[0053] The crushing mechanism includes a transmission rod 12 fixedly arranged on one side of the crushing roller 4. One side of the first bevel gear 9 is meshingly connected with a second bevel gear 13. The bottom of the second bevel gear 13 is fixedly connected with a first double-groove transmission wheel 14. The top of the transmission rod 12 penetrates into the interior of the transmission groove 5 and is fixedly connected with a second double-groove transmission wheel 15. The first double-groove transmission wheel 14 and the second double-groove transmission wheel 15 are drivingly connected through a belt 16.

[0054] In this embodiment, the second bevel gear 13 is driven to rotate simultaneously with the rotation of the first bevel gear 9. The first double-groove transmission wheel 14 rotates around the first bearing 36 synchronously with the second bevel gear 13. At the same time, the first double-groove transmission wheel 14 drives the second double-groove transmission wheel 15 to rotate through the belt 16. The transmission rod 12 and the crushing roller 4 also rotate synchronously. When the crushing roller 4 rotates, the large coal block pierced by the ejector pin 6 is broken again, effectively splits into small coal blocks, avoids blockage, and further improves the efficiency of coal mining.

[0055] The transmission block 11 is fixedly connected with a sliding block 34 on both sides. The inner wall of the transmission groove 5 is provided with a sliding groove 35 used in cooperation with the sliding block 34.

[0056] In this embodiment, when the screw rod 10 drives the sliding block 34 and the sliding groove 35 to rotate, the transmission block 11 and the ejector pin 6 and other structures are limited to reciprocate along the track of the sliding block 34 and the sliding groove 35 within the limitation of the sliding block 34, which plays a role in limiting the movement track.

[0057] One side of the first double-groove transmission wheel 14 is rotatably connected with the inner wall of the transmission groove 5 through a first bearing 36. One side of the second double-groove transmission wheel 15 is rotatably connected with the inner wall of the transmission groove 5 through a second bearing 37.

[0058] In this embodiment, the first bearing 36 and the second bearing 37 are provided to support the first double-groove transmission wheel 14 and the second double-groove transmission wheel 15 and limit their rotation, which improves the smoothness of the rotation.

[0059] Embodiment three:

[0060] On the basis of the second embodiment, the crushing mechanism in this embodiment can perform secondary crushing on the punctured coal blocks by rotating the crushing roller 4, so as to effectively split them into small coal blocks, thereby improving the efficiency of coal mining. However, considering that some coal blocks may also adhere to the surface of the tail beam 2, which may easily cause the coal drop port to be blocked, the present application further includes a vibration mechanism, which is fixedly arranged on the second double-groove transmission wheel 15. When the crushing roller 4 rotates, it can knock on the tail beam 2 to generate vibration;

[0061] The vibration mechanism includes a cam 17 fixedly arranged on one side of the second double-groove transmission wheel 15, and an extrusion block 18 is provided on one side of the cam 17. A traction rod 19 is fixedly connected to one side of the extrusion block 18. One end of the traction rod 19 passes through one side of the tail beam 2 and is fixedly connected to a linkage block 20. One side of the linkage block 20 is fixedly connected to a knocking rod 21. A tension spring 22 is sleeved on the surface of the traction rod 19, one end of the tension spring 22 is fixedly connected to one side of the linkage block 20, and the other end of the tension spring 22 is fixedly connected to one side of the tail beam 2.

[0062] In this embodiment, by setting a vibration mechanism, the cam 17 can be driven to rotate when the second double-groove transmission wheel 15 rotates. When the protruding end of the cam 17 contacts the extrusion block 18, the reference Figure 11 As shown, under the influence of extrusion, the traction rod 19 and the linkage block 20 will move to the side away from the cam 17, and at the same time drive the tension spring 22 to a stretched state. When the cam 17 rotates to no longer contact the extrusion block 18, the tension generated by the tension spring 22 will drive the linkage block 20 to reset suddenly, and the knocking rod 21 will move synchronously, and at the same time drive the conical buffer block 32 and the rubber pad 33 to knock on the tail beam 2, and the cycle will continue. The intermittent knocking will generate vibration force, which will shake off the coal blocks adhering to the surface of the tail beam 2, effectively avoiding blockage of the coal drop port and further improving the efficiency of coal mining.

[0063] It should be noted that Figure 11 S1 is the moving track of the cam 17 , and S2 is the moving track of the extrusion block 18 .

[0064] One end of the knock rod 21 is fixedly connected to a conical buffer block 32 , and one side of the conical buffer block 32 is fixedly connected to a rubber pad 33 .

[0065] In this embodiment, by providing a conical buffer block 32 and a rubber pad 33, the knocking rod 21 can be prevented from directly knocking on the tail beam 2. The conical buffer block 32 and the rubber pad 33 can play an auxiliary buffering role and a protective buffering role.

[0066] Example 4:

[0067] On the basis of the second embodiment, the crushing mechanism in this embodiment can perform secondary crushing on the punctured coal blocks by rotating the crushing roller 4, so as to effectively split them into small coal blocks, thereby improving the efficiency of coal mining. However, some coal slag will adhere to the crushing roller 4, which will also affect the crushing effect. The present application also includes a self-cleaning mechanism, which is fixedly arranged on the linkage block 20;

[0068] The self-cleaning mechanism includes a connecting block 23 fixedly connected to one side of the linkage block 20, a compression box 24 fixedly connected to one side of the connecting block 23, a side of the compression box 24 fixedly connected to one side of the tail beam 2, an air intake pipe 25 fixedly connected to the top of the compression box 24, and an exhaust pipe 26 fixedly connected to one side of the compression box 24, and one side of the exhaust pipe 26 extends into the interior of the crushing tank 3;

[0069] A push block 27 is provided inside the compression box 24 , and a push rod 28 is fixedly connected to one side of the push block 27 . One end of the push rod 28 passes through one side of the compression box 24 and is fixedly connected to one side of the connection block 23 .

[0070] In this embodiment, by providing a self-cleaning mechanism, when the linkage block 20 moves back and forth, Figure 10 and Figure 11 As shown, when the linkage block 20 moves to the right, the linkage block 20 will drive the connecting block 23, the push rod 28, the push block 27 and the piston plate 31 to move to the right. At this time, the compression box 24 is under negative pressure, and the gas will enter the compression box 24 through the air inlet pipe 25. When the linkage block 20 moves to the left, it will drive the connecting block 23, the push rod 28, the push block 27 and the piston plate 31 to move to the left, squeezing the gas in the compression box 24. When the gas in the compression box 24 reaches the limit of the one-way pressure valve 30, the gas will be ejected from the exhaust pipe 26 and blown to the crushing roller 4, blowing off the coal slag adhered to its surface, thereby improving the effect of subsequent crushing and further improving the efficiency of coal mining.

[0071] A one-way valve 29 is fixedly mounted on the surface of the intake pipe 25 , and a one-way pressure valve 30 is fixedly mounted on the surface of the exhaust pipe 26 .

[0072] In this embodiment, a one-way valve 29 and a one-way pressure valve 30 are provided, wherein the one-way valve 29 is a valve that can only intake air into the compression box 24, and the one-way pressure valve 30 is a valve that can only exhaust air from the compression box 24. Therefore, when the compression box 24 is under negative pressure, the gas will enter the compression box 24 through the intake pipe 25. When the gas in the compression box 24 is squeezed, the gas can only be ejected through the exhaust pipe 26.

[0073] A piston plate 31 is fixedly connected to one side of the push block 27 , and an outer surface of the piston plate 31 contacts the inner wall of the compression box 24 .

[0074] In this embodiment, by setting the piston plate 31, a closed cavity is formed inside the compression box 24, so as to complete the process of gas collection and injection through the piston plate 31.

[0075] Working principle: through the jacks in the top coal caving hydraulic support body 1, the tail beam 2 is swung to the state shown in the figure Figure 1 After the state, one side of the tail beam 2 forms a coal falling opening, and the top coal falls through the coal falling opening. At the same time, the motor 8 is started, the first bevel gear 9 and the lead screw 10 are driven to rotate, the lead screw 10 rotates and drives the transmission block 11 to rotate, the transmission block 11 moves back and forth along the track of the sliding block 34 and the sliding groove 35, and the ejector pin 6 moves back and forth synchronously with the transmission block 11. When the large coal block passes through the coal falling opening, the ejector pin 6 will pierce into the inside of the large coal block, so that the coal block is broken and split into small coal blocks, effectively avoiding the coal falling opening being blocked by the large coal block, thereby improving the efficiency of coal mining.

[0076] At the same time of the rotation of the first bevel gear 9, the second bevel gear 13 is driven to rotate, the first double-groove transmission wheel 14 rotates synchronously with the second bevel gear 13 around the first bearing 36, and at the same time, the first double-groove transmission wheel 14 drives the second double-groove transmission wheel 15 to rotate through the belt 16, the transmission rod 12 and the crushing roller 4 also rotate synchronously, and the crushing roller 4 rotates to crush the large coal block pierced by the ejector pin 6, so that the large coal block is effectively split into small coal blocks, avoiding blockage, and further improving the efficiency of coal mining.

[0077] When the second double-groove transmission wheel 15 rotates, the cam 17 rotates, and when the protruding end of the cam 17 contacts the extrusion block 18, as shown in Figure 11 , the traction rod 19 and the linkage block 20 move away from the cam 17 under the influence of extrusion, and at the same time, the tension spring 22 is in a stretched state, and when the cam 17 is not in contact with the extrusion block 18, the tension of the tension spring 22 drives the linkage block 20 and the reset hammer 21 to move synchronously, and at the same time, the conical buffer block 32 and the rubber pad 33 are knocked on the tail beam 2, and the process is repeated, and the intermittent knocking produces a vibration force, which shakes the coal adhering to the surface of the tail beam 2, effectively avoiding the coal falling opening being blocked, and further improving the efficiency of coal mining.

[0078] When the linkage block 20 moves back and forth, as shown in Figure 10 and Figure 11As shown, when the linkage block 20 moves to the right, the linkage block 20 will drive the connecting block 23, the push rod 28, the push block 27 and the piston plate 31 to move to the right, at this time, the compression box 24 is negative pressure, the gas will enter the compression box 24 from the air inlet pipe 25, when the linkage block 20 moves to the left, it will drive the connecting block 23, the push rod 28, the push block 27 and the piston plate 31 to move to the left, to extrude the gas in the compression box 24, when the gas in the compression box 24 reaches the limit of the one-way pressure valve 30, the gas will be sprayed from the exhaust pipe 26, blow to the broken roller 4, blow off the coal ash adhered to the surface of the broken roller 4, improve the effect of subsequent crushing, further improve the efficiency of coal mining.

[0079] It should be noted that the top coal caving hydraulic support body 1 and the motor 8 are devices or equipment existing in the prior art or devices or equipment that can be realized in the prior art, and the power supply specific composition and principle of the top coal caving hydraulic support body 1 and the motor 8 are clear to those skilled in the art, so they will not be described in detail.

[0080] It should be noted that in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0081] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A safety protection coal mine support, comprising a top coal caving hydraulic support body (1) and a tail beam (2), wherein the tail beam (2) is hinged to one side of the top coal caving hydraulic support body (1), and is characterized in that: A crushing groove (3) is provided on one side of the tail beam (2), two crushing rollers (4) are provided inside the crushing groove (3), a transmission groove (5) is provided inside the tail beam (2), a thimble (6) is provided inside the transmission groove (5), and a receiving groove (7) used in conjunction with the thimble (6) is provided on one side of the tail beam (2); A transmission mechanism, the transmission mechanism being fixedly arranged on the tail beam (2) and capable of controlling the ejector pin (6) to move back and forth to pierce the coal block when the coal block passes through the coal drop opening, thereby crushing and splitting the coal block; The transmission mechanism comprises a motor (8) fixedly arranged on one side of the tail beam (2), an output end of the motor (8) extending through the interior of the transmission slot (5) and fixedly connected to a first bevel gear (9), a screw rod (10) being fixedly connected to one side of the first bevel gear (9), a surface of the screw rod (10) being transmission-connected to a transmission block (11), and one side of the transmission block (11) being fixedly connected to one end of the ejector pin (6).

2. A safety protection coal mine support according to claim 1, characterized in that: It also includes a crushing mechanism, which is fixedly arranged on the crushing roller (4) and can control the two crushing rollers (4) to rotate; The crushing mechanism comprises a transmission rod (12) fixedly arranged on one side of the crushing roller (4); one side of the first bevel gear (9) is meshedly connected to the second bevel gear (13); the bottom of the second bevel gear (13) is fixedly connected to the first double-groove transmission wheel (14); the top of the transmission rod (12) passes through the interior of the transmission groove (5) and is fixedly connected to the second double-groove transmission wheel (15); the first double-groove transmission wheel (14) and the second double-groove transmission wheel (15) are connected by a belt (16).

3. A safety protection coal mine support according to claim 2, characterized in that: It also includes a vibration mechanism, which is fixedly arranged on the second double-groove transmission wheel (15) and can knock the tail beam (2) to generate vibration when the crushing roller (4) rotates; The vibration mechanism includes a cam (17) fixedly arranged on one side of the second double-groove transmission wheel (15), an extrusion block (18) is provided on one side of the cam (17), a traction rod (19) is fixedly connected to one side of the extrusion block (18), one end of the traction rod (19) passes through one side of the tail beam (2) and is fixedly connected to a linkage block (20), one side of the linkage block (20) is fixedly connected to a knocking rod (21), a tension spring (22) is sleeved on the surface of the traction rod (19), one end of the tension spring (22) is fixedly connected to one side of the linkage block (20), and the other end of the tension spring (22) is fixedly connected to one side of the tail beam (2).

4. A safety protection coal mine support according to claim 3, characterized in that: It also includes a self-cleaning mechanism, which is fixedly arranged on the linkage block (20); The self-cleaning mechanism comprises a connecting block (23) fixedly connected to one side of the linkage block (20), a compression box (24) fixedly connected to one side of the connecting block (23), a compression box (24) fixedly connected to one side of the tail beam (2), an air intake pipe (25) fixedly connected to the top of the compression box (24), an exhaust pipe (26) fixedly connected to one side of the compression box (24), and a side of the exhaust pipe (26) extending through the interior of the crushing tank (3); A push block (27) is provided inside the compression box (24), one side of the push block (27) is fixedly connected to a push rod (28), one end of the push rod (28) passes through one side of the compression box (24) and is fixedly connected to one side of the connection block (23).

5. A safety protection coal mine support according to claim 4, characterized in that: A one-way valve (29) is fixedly mounted on the surface of the air inlet pipe (25), and a one-way pressure valve (30) is fixedly mounted on the surface of the exhaust pipe (26).

6. A safety protection coal mine support according to claim 4, characterized in that: A piston plate (31) is fixedly connected to one side of the pushing block (27), and the outer surface of the piston plate (31) contacts the inner wall of the compression box (24).

7. The safety protection coal mine support according to claim 3, characterized in that: One end of the knocking rod (21) is fixedly connected to a conical buffer block (32), and one side of the conical buffer block (32) is fixedly connected to a rubber pad (33).

8. The safety protection coal mine support according to claim 2, characterized in that: Sliding blocks (34) are fixedly connected to both sides of the transmission block (11), and a sliding groove (35) for use with the sliding block (34) is provided on the inner wall of the transmission groove (5).

9. The safety protection coal mine support according to claim 2, characterized in that: One side of the first double-groove transmission wheel (14) is rotatably connected to the inner wall of the transmission groove (5) via a first bearing (36), and one side of the second double-groove transmission wheel (15) is rotatably connected to the inner wall of the transmission groove (5) via a second bearing (37).

10. A safety protection coal mine support according to any one of claims 1 to 9, characterized in that: One end of the ejector pin (6) is tapered, and there are several ejector pins (6).

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