An efficient grouting device and grouting method for coal mine fault grouting

Abstract

The present invention discloses an efficient grouting device and a grouting method for coal mine fault grouting, belonging to the technical field of grouting devices. Among them, the efficient grouting device for coal mine fault grouting includes a material cylinder and a pressing plate sliding inside the material cylinder. The top of the pressing plate is rotatably connected with a sealing plate, and the sealing plate is elastically matched with the pressing plate. A connecting pipe is integrally formed at the bottom end of the material cylinder, and a sphere is assembled inside the connecting pipe; through the cooperation of the sealing plate and the pressing plate provided in this device, when the top end of the connecting pipe is blocked by stones and affects the filling of the slurry, during the downward movement of the pressing plate and the sealing plate, the second round hole can be aligned with the through hole, so that the water flow can spray upward through the sphere and the connecting pipe, thereby pushing the blocked stones to the bottom surface of the material cylinder. As the pressing plate moves downward, the stones can be crushed, thus preventing the stones from continuing to block the connecting pipe and being conducive to the normal transportation of the slurry.

Description

Technical Field

[0001] The present invention relates to the technical field of grouting devices, and particularly relates to an efficient grouting device and grouting method for coal mine fault grouting. Background Technique

[0002] Due to the presence of gas and crustal movements, some coal seams will form fissures, which will deteriorate the stability of the coal seams. Therefore, when excavating coal mines to mine coal seams, it is necessary to first seal the potentially dangerous coal seam fissures to stabilize the coal seams.

[0003] Chinese Patent CN113738302B discloses a fissure grouting and plugging device for coal seams. As the pull ring rotates, the bolt is disengaged from the inner wall of the main rod. At this time, the slide rod together with the bolt and the bottom cone can be withdrawn from the vent hole. The vent hole connects the lower coal seam fissure with the upper part, so that the gas in the coal seam can escape upward through the vent hole to avoid the continuously accumulating gas being blocked in the coal seam plugged by the slurry.

[0004] The above device opens a plurality of vertical holes on the main rod to convey the slurry through the vertical holes. However, in actual use, when a large stone blocks the vertical hole, the piston will squeeze the stone into the vertical hole during the downward movement, resulting in the blockage of the vertical hole and being not conducive to the stable conveyance of the slurry. In summary, the above device still has room for improvement.

[0005] Therefore, it is necessary to provide an efficient grouting device and grouting method for coal mine fault grouting to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide an efficient grouting device and grouting method for coal mine fault grouting to solve the problem that the existing device opens a plurality of vertical holes on the main rod to convey the slurry through the vertical holes, but in actual use, when a large stone blocks the vertical hole, the piston will squeeze the stone into the vertical hole during the downward movement, resulting in the blockage of the vertical hole and being not conducive to the stable conveyance of the slurry as mentioned in the above background technique.

[0007] Based on the above idea, the present invention provides the following technical solution: An efficient grouting device for coal mine fault grouting includes a material cylinder and a pressing plate sliding inside the material cylinder. The top of the pressing plate is rotatably connected with a sealing plate, and the sealing plate is elastically matched with the pressing plate. The bottom end of the material cylinder is integrally formed with a connecting pipe, and a sphere is assembled in the connecting pipe. A plurality of first round holes and second round holes are evenly opened on the pressing plate, and a plurality of through holes are evenly opened on the sealing plate. The sealing plate and the material cylinder are matched through a limiting component, and through the limiting component, the sealing plate can rotate relative to the pressing plate during the vertical movement.

[0008] The sealing plate and the pressure plate are matched through a clamping component. When the pressure plate is blocked during the process of extruding the slurry, the clamping component can release the limit on the sealing plate, so that the through hole on the sealing plate is aligned with the second round hole on the pressure plate. During the process of the pressure plate being pressed, the sphere can rotate relative to the connecting pipe, so that the external water source can be introduced into the connecting pipe through the sphere and finally sprayed out from the top end of the connecting pipe.

[0009] As a further scheme of the present invention: a through-flow guiding channel is formed on the sphere, both ends of the through-flow guiding channel extend to the spherical surface of the sphere respectively, and a guiding hole is formed on the sphere. The guiding hole is perpendicular to the through-flow guiding channel. The bottom end of the guiding hole is communicated with the through-flow guiding channel, and the top end of the guiding hole extends to the spherical surface of the sphere.

[0010] As a further scheme of the present invention: a sliding block is fixedly arranged on the bottom surface of the sealing plate, and an annular sliding groove is formed on the top surface of the pressure plate. The sliding block is slidably arranged in the sliding groove, and the cross sections of the sliding block and the sliding groove are both arranged in a T shape. A stop block is fixedly installed in the sliding groove, and an elastic telescopic rod is fixedly arranged between the stop block and the sliding block.

[0011] As a further scheme of the present invention: the clamping component includes a clamping block arranged on the inner bottom surface of the sliding groove. The clamping block can move in the vertical direction relative to the pressure plate. The clamping block is located on the side of the sliding block away from the stop block, and the side of the clamping block away from the sliding block is arranged as an inclined surface. When the through hole is between the first round hole and the second round hole, the sliding block can be attached to one side of the clamping block.

[0012] As a further scheme of the present invention: the limiting component includes a limiting block arranged on the outer peripheral wall of the sealing plate and elastically matched with the sealing plate. An inclined limiting groove is formed on the inner wall of the material cylinder near the top end, and the end of the limiting block close to the material cylinder is arranged as an inclined pressing surface.

[0013] As a further scheme of the present invention: a motor is fixedly installed on the side wall of the connecting pipe, a connecting rod is installed at the output end of the motor, and the connecting rod passes through the connecting pipe and is fixedly connected with the sphere.

[0014] As a further scheme of the present invention: an installation groove is formed on the top surface of the pressure plate, a connecting block is elastically arranged in the installation groove, an electromagnet matched with the clamping block is arranged on the pressure plate, the clamping block is made of iron, and a detection unit is installed on the inner bottom surface of the installation groove. The detection unit is used to control the electromagnet and the motor.

[0015] As a further scheme of the present invention: the cross sections of the installation groove and the connecting block are both arranged in a T shape.

[0016] As a further solution of the present invention: a boss is installed on the top surface of the connecting block, a turntable is arranged above the barrel, the turntable and the boss are coplanar, and a connecting rod is hinged between the boss and the turntable, and the position where the connecting rod is hinged to the turntable is at the edge of the turntable.

[0017] A method of grouting using the above-mentioned efficient grouting device for coal mine faults, comprising the following steps: introducing the slurry into the barrel, so that the slurry enters below the pressing plate through the through hole and the first round hole; driving the pressing plate to move downward to extrude the slurry into the fault of the coal mine; when the pressing plate is blocked during the process of extruding the slurry, water can be introduced into the connecting pipe through the sphere and sprayed upward, so that the stones blocked at the connecting pipe are pushed to the bottom surface of the barrel; as the pressing plate continues to move downward, the stones can be broken.

[0018] Compared with the prior art, the beneficial effect of the present invention is: through the cooperation of the sealing plate and the pressing plate provided in this device, when the top end of the connecting pipe is blocked by stones and affects the filling of the slurry, during the downward movement of the pressing plate and the sealing plate, the second round hole can be aligned with the through hole, so that the water flow can be sprayed upward through the sphere and the connecting pipe, and then the blocked stones are pushed to the bottom surface of the barrel. As the pressing plate moves downward, the stones can be crushed, thus avoiding the continuous blockage of the connecting pipe by the stones and being beneficial to the normal transportation of the slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the drawings and embodiments:

[0020] Figure 1 is the overall structural schematic diagram of the present invention;

[0021] Figure 2 is the three-dimensional structural schematic diagram of the present invention;

[0022] Figure 3 is the present invention Figure 1 magnified structural schematic diagram at A;

[0023] Figure 4 is the sectional view of the barrel of the present invention;

[0024] Figure 5 is the present invention Figure 4 magnified structural schematic diagram at B;

[0025] Figure 6 is the present invention Figure 4 magnified structural schematic diagram at C;

[0026] Figure 7 is the structural schematic diagram of the first round hole and the second round hole of the present invention;

[0027] Figure 8 is the structural schematic diagram of the chute of the present invention;

[0028] Figure 9 is the enlarged structure schematic diagram at position D of the present invention; Figure 8 The enlarged structure schematic diagram at position D of the present invention;

[0029] Figure 10 is the schematic diagram of the spherical structure of the present invention;

[0030] Figure 11 is the schematic diagram of the diversion channel parallel to the connecting pipe of the present invention;

[0031] Figure 12 is the schematic diagram of the diversion channel perpendicular to the connecting pipe of the present invention;

[0032] Figure 13 is the schematic diagram of the clamping block structure of the present invention.

[0033] In the figure: 1, fixed plate; 2, barrel; 201, connecting pipe; 202, limiting groove; 3, material guiding pipe; 4, turntable; 5, connecting rod; 6, sealing plate; 601, through hole; 602, limiting block; 6021, extrusion surface; 603, sliding block; 7, air inlet pipe; 8, control switch; 9, pressing rod; 10, motor; 11, pump body; 12, liquid inlet pipe; 13, pressing plate; 1301, positioning block; 1302, first round hole; 1303, second round hole; 1304, sliding groove; 14, sphere; 1401, diversion channel; 1402, diversion hole; 15, connecting rod; 16, connecting block; 1601, convex platform; 17, detection unit; 18, stop block; 19, telescopic rod; 20, clamping block; 2001, inclined surface; 21, electromagnet; 22, reset switch. Detailed implementation manners

[0034] As Figures 1 - 10 shown, a high-efficiency grouting device and grouting method for coal mine fault grouting include a barrel 2 and a pressing plate 13 sliding inside the barrel 2. The bottom surface of the inner part of the barrel 2 and the bottom surface of the pressing plate 13 can both be set to be conical. The pressing plate 13 is in sealing fit with the barrel 2. A sealing plate 6 is assembled on the top of the pressing plate 13. The sealing plate 6 can rotate relative to the pressing plate 13 and the sealing plate 6 is elastically matched with the pressing plate 13. A plurality of first round holes 1302 and a plurality of second round holes 1303 are evenly formed on the pressing plate 13. The first round holes 1302 and the second round holes 1303 are staggered. And a plurality of through holes 601 are evenly formed on the sealing plate 6. With this structure, when the through holes 601 are aligned with the first round holes 1302 or the second round holes 1303, the materials in the barrel 2 can be exported upward through the pressing plate 13 and the sealing plate 6. And when the through holes 601 are between the first round holes 1302 and the second round holes 1303 and are staggered with both of them, the slurry in the barrel 2 can be extruded downward during the downward movement of the pressing plate 13;

[0035] Furthermore, a connecting pipe 201 is integrally formed at the bottom end of the barrel 2. The top end of the connecting pipe 201 is communicated with the barrel 2. A sphere 14 is assembled in the connecting pipe 201. By rotating the sphere 14, the connecting pipe 201 can be in a conducting or closed state. In order to drive the sphere 14 to rotate, a motor 10 is fixedly installed on the side wall of the connecting pipe 201 in this solution. The output end of the motor 10 is connected with a connecting rod 15. The connecting rod 15 passes through the connecting pipe 201 and is fixedly connected with the sphere 14. The connecting rod 15 is rotationally matched with the connecting pipe 201;

[0036] Referring to Figures 10 - 12 As shown, a through-flow guiding channel 1401 is axially formed through the sphere 14. The two ends of the through-flow guiding channel 1401 respectively extend to the spherical surface of the sphere 14. And a guiding hole 1402 is formed in the sphere 14. The guiding hole 1402 is perpendicular to the through-flow guiding channel 1401. Specifically, the bottom end of the guiding hole 1402 is communicated with the through-flow guiding channel 1401, and the top end of the guiding hole 1402 extends to the spherical surface of the sphere 14. During normal use, the through-flow guiding channel 1401 is in a state parallel to the connecting pipe 201. At this time, the connecting pipe 201 is in a conducting state. And when the guiding hole 1402 is in a state parallel to the connecting pipe 201, the connecting pipe 201 is in a blocked state.

[0037] The sealing plate 6 and the pressing plate 13 are matched through a clamping component. When the through-hole 601 is between the first round hole 1302 and the second round hole 1303, the sealing plate 6 can be locked on the top of the pressing plate 13 through the clamping component. And the sealing plate 6 and the barrel 2 are matched through a limiting component. When the sealing plate 6 moves upward to a position near the top end of the barrel 2, the sealing plate 6 can rotate relative to the pressing plate 13 through the arranged limiting component to adjust the position of the through-hole 601. During actual use, when a large stone blocks the top end of the connecting pipe 201, the pressing plate 13 will be subjected to a large pressure during the downward extrusion process, so that the clamping component releases the limit on the sealing plate 6. At this time, the sealing plate 6 will rotate relative to the pressing plate 13 so that the through-hole 601 is aligned with the second round hole 1303. In addition, when the pressing plate 13 moves downward and encounters a large resistance, the sphere 14 in the connecting pipe 201 can rotate, so that the connecting pipe 201 can be sealed through the sphere 14. When water is conveyed into the connecting pipe 201 through the sphere 14, the water flow sprays out from the top end of the connecting pipe 201, thereby pushing the stone to move to the bottom surface of the barrel 2. Therefore, when the pressing plate 13 moves downward to the bottom end of the barrel 2, the stone can be broken, and the stone can be prevented from continuing to block the top end of the connecting pipe 201, which is beneficial to the stable output of the slurry.

[0038] As Figures 1 - 10As shown, in order to assemble the sealing plate 6 with the pressure plate 13, a sliding block 603 is fixedly arranged on the bottom surface of the sealing plate 6, and an annular sliding groove 1304 is formed on the top surface of the pressure plate 13. The sliding block 603 is slidably arranged in the sliding groove 1304, and the cross-sections of both the sliding block 603 and the sliding groove 1304 are arranged in a T shape. The above-mentioned sealing plate 6 is of an annular structure as a whole;

[0039] In order to achieve elastic cooperation between the sealing plate 6 and the pressure plate 13, a stop block 18 is fixedly installed in the sliding groove 1304, and an elastic telescopic rod 19 is fixedly arranged between the stop block 18 and the sliding block 603. The telescopic rod 19 is of an arc-shaped structure as a whole.

[0040] The clamping assembly includes a clamping block 20 arranged on the inner bottom surface of the sliding groove 1304. The clamping block 20 can move in the vertical direction relative to the pressure plate 13. The clamping block 20 is located on the side of the sliding block 603 away from the stop block 18, and the side of the clamping block 20 away from the sliding block 603 is provided with an inclined surface 2001. Specifically, when the through hole 601 is located between the first round hole 1302 and the second round hole 1303 and is staggered from both of them, the sliding block 603 can be attached to one side of the clamping block 20. At this time, the sliding block 603 can be limited by the clamping block 20.

[0041] The limiting assembly includes a limiting block 602 arranged on the outer peripheral wall of the sealing plate 6 and elastically cooperating with the sealing plate 6. An arc-shaped and inclined limiting groove 202 is formed at a position near the top end on the inner wall of the material cylinder 2. When one end of the limiting block 602 is inserted into the limiting groove 202, as the sealing plate 6 moves in the vertical direction, the sealing plate 6 can rotate relative to the pressure plate 13;

[0042] Further, referring to Figure 5 As shown, the end of the limiting block 602 close to the material cylinder 2 is provided with an inclined pressing surface 6021. When one end of the limiting block 602 is inserted into the limiting groove 202, a part of the pressing surface 6021 can be located outside the limiting groove 202. With this structure, when the limiting block 602 slides downward relative to the limiting groove 202 and the pressure on the bottom edge of the limiting groove 202 increases, the limiting block 602 can move out of the limiting groove 202.

[0043] In order to drive the pressure plate 13 to move up and down in the barrel 2, in this solution, a connecting block 16 is elastically connected to the center of the top surface of the pressure plate 13. Specifically, an installation groove is formed in the top surface of the pressure plate 13, and the connecting block 16 is located in the installation groove. The cross-sections of both the installation groove and the connecting block 16 are T-shaped. A boss 1601 is installed on the top surface of the connecting block 16. The boss 1601 can be fixedly connected or hinged to the connecting block 16. A turntable 4 is arranged above the barrel 2. The turntable 4 and the boss 1601 are coplanar, and a connecting rod 5 is hinged between the boss 1601 and the turntable 4. The position where the connecting rod 5 is hinged to the turntable 4 is at the edge of the turntable 4. Specifically, refer to Figure 1 As shown, through this structure, when the turntable 4 rotates, the pressure plate 13 can be driven to move up and down in the barrel 2 through the connecting rod 5.

[0044] Combined with Figures 3 - 6 、 Figure 13 As shown, an electromagnet 21 that cooperates with the latch 20 is arranged on the pressure plate 13. The latch 20 is made of iron. When the electromagnet 21 is energized, the electromagnet 21 can attract the latch 20 to move downward. When the electromagnet 21 is de-energized, the latch 20 can bounce upward. A detection unit 17 is installed on the inner bottom surface of the installation groove. The detection unit 17 is used to control the above-mentioned electromagnet 21 and the motor 10. Specifically, when a stone blocks the top end of the connecting pipe 201, the pressure plate 13 is subjected to a large resistance when squeezing the slurry downward. At this time, the connecting block 16 will squeeze the detection unit 17, and through the detection unit 17, the electromagnet 21 can be prompted to be energized, and the motor 10 can be controlled to drive the connecting rod 15 to rotate.

[0045] A liquid inlet pipe 12 is fixedly arranged at the connecting pipe 201. One end of the liquid inlet pipe 12 extends into the connecting pipe 201 and can communicate with the diversion channel 1401 on the sphere 14. A pump body 11 is fixedly installed at the bottom end of the barrel 2. The output end of the pump body 11 is communicated with the liquid inlet pipe 12, and the input end of the pump body 11 is communicated with an external water tank. An L-shaped pressure rod 9 is fixedly arranged on the top surface of the sealing plate 6. A control switch 8 is installed on the outer side wall of the barrel 2 near the top end. The control switch 8 is electrically connected to the above-mentioned pump body 11. When the through hole 601 is aligned with the second round hole 1303, the pressure rod 9 can be aligned with the control switch 8 in the vertical direction.

[0046] During actual use, the rotation of the turntable 4 drives the deflection of the connecting rod 5, thereby driving the pressure plate 13 to move upward through the connecting rod 5. When the sealing plate 6 at the top of the pressure plate 13 moves upward to the limiting groove 202, the limiting block 602 on the peripheral wall of the sealing plate 6 can be inserted into the limiting groove 202, so that the sealing plate 6 can rotate during the process of moving upward with the pressure plate 13. When the limiting block 602 moves to the top end of the limiting groove 202, the through hole 601 is aligned with the first round hole 1302. At this time, the staff can introduce the slurry into the barrel 2, and the slurry enters below the pressure plate 13 through the through hole 601 and the first round hole 1302. Then, the deflection of the connecting rod 5 drives the pressure plate 13 to move downward. During this process, the limiting block 602 can move downward along the limiting groove 202, so that the sealing plate 6 rotates in the reverse direction. When the slider 603 moves to one side of the clamping block 20, the sealing plate 6 and the pressure plate 13 remain relatively stable. Moreover, the through hole 601 is located between the first round hole 1302 and the second round hole 1303 and is staggered from both of them, so that the pressure plate 13 is in a closed state. When the pressure plate 13 continues to move downward, since the sealing plate 6 is locked on the pressure plate 13, the pressure between the limiting block 602 and the bottom edge of the limiting groove 202 increases, so that the limiting block 602 can move out of the limiting groove 202. As the connecting rod 5 continues to drive the pressure plate 13 to move downward, the pressure plate 13 can extrude the slurry in the barrel 2 through the connecting pipe 201 and inject it into the fault of the coal mine;

[0047] When a stone is blocked at the top position of the connecting pipe 201, the pressure plate 13 will be subjected to a large resistance when squeezing the slurry downward, so that the pressure of the connecting block 16 on the detection unit 17 increases. When the pressure reaches the set value, the detection unit 17 can cause the electromagnet 21 to be energized, and the electromagnet 21 can adsorb the clamping block 20 to move downward, so that the clamping block 20 is staggered from the slider 603. At this time, the sealing plate 6 can rotate relative to the pressure plate 13, so that the through hole 601 is aligned with the second round hole 1303, and the raw material in the barrel 2 can flow upward through the pressure plate 13 and the sealing plate 6. At the same time, the detection unit 17 can control the operation of the motor 10, and the motor 10 drives the sphere 14 to rotate through the connecting rod 15. Refer to Figure 12As shown, when the diversion holes 1402 on the sphere 14 are in a state parallel to the connecting pipe 201, the sphere 14 can block the connecting pipe 201. When the through hole 601 is aligned with the second round hole 1303, the pressing rod 9 can be aligned with the control switch 8. Therefore, when the pressing plate 13 moves downward to near the bottom end of the cartridge 2, the pressing rod 9 can contact the control switch 8 and start the pump body 11 through the control switch 8. The pump body 11 can pump water into the liquid inlet pipe 12, and then enter the sphere 14 through the liquid inlet pipe 12 and finally spray upward through the diversion holes 1402. As the liquid continuously sprays out from the top end of the connecting pipe 201, the stones blocking the top end of the connecting pipe 201 will be pushed away and located at the bottom surface of the cartridge 2. As the pressing plate 13 continues to move downward, the stones can be crushed, thus preventing the stones from blocking the connecting pipe 201 again;

[0048] After that, the connecting rod 5 can drive the pressing plate 13 to move upward and reset. During the upward movement of the sealing plate 6, the limiting block 602 can slide along the limiting groove 202, causing the sealing plate 6 to rotate relative to the pressing plate 13. During this process, the slider 603 will cross the fixture block 2 through the inclined surface 2001 on the fixture block 2, so that the through hole 601 is aligned with the first round hole 1302. Refer to Figure 6 As shown, a reset switch 22 can be installed on the inner top wall of the installation groove. The reset switch 22 is connected to the above-mentioned motor 10 by signal connection or electrical connection. When the limiting block 602 moves to the top end of the limiting groove 202, as the connecting rod 5 drives the connecting block 16 to move upward, the connecting block 16 can squeeze the reset switch 22, thereby prompting the motor 10 to reset, which is beneficial for the next use.

[0049] In summary, this device is provided with the sealing plate 6 cooperating with the pressing plate 13. When the top end of the connecting pipe 201 is blocked by stones and affects the slurry filling, during the downward movement of the pressing plate 13 and the sealing plate 6, the second round hole 1303 can be aligned with the through hole 601, enabling the water flow to spray upward through the sphere 14 and the connecting pipe 201, thereby pushing the blocked stones to the bottom surface of the cartridge 2. As the pressing plate 13 moves downward, the stones can be crushed, thus preventing the stones from continuously blocking the connecting pipe 201 and being beneficial for the normal transportation of the slurry.

[0050] As Figures 1 - 12 shown, two groups of brackets are fixedly installed on the outer side wall of the cartridge 2, and one end of the bracket is fixedly installed with a fixing plate 1. The fixing plate 1 can be connected to the robotic arm on the crawler vehicle. The bottom end of the connecting pipe 201 is communicated with a material guiding pipe 3. With this structure, it is beneficial to drive the whole device to move and insert the material guiding pipe 3 into the corresponding fault for grouting operation.

[0051] A driving motor is fixedly installed on the back of the fixed plate 1, and a driving rod is fixedly provided on a side of the turntable 4 close to the fixed plate 1. The driving rod passes through the fixed plate 1 and rotates with it, and the output shaft of the driving motor is transmission-connected to one end of the driving rod passing through the fixed plate 1, so as to drive the turntable 4 to rotate.

[0052] A pin is fixedly provided on the side of the turntable 4 near the edge and on the side of the boss 1601, and the pin passes through the connecting rod 5 and rotates therewith.

[0053] Reference Figure 3 As shown, a support platform is fixedly installed on the outer wall of the barrel 2, and the control switch 8 is installed on the top of the support platform, and the control switch 8 can be elastically matched with the support platform through a spring.

[0054] In actual use, the air intake pipe 7 can be fixedly installed on the pressure plate 13, and the air intake pipe 7 is set to an inverted "J" shape. Specifically, the bottom end of the air intake pipe 7 can pass through the pressure plate 13, and a one-way valve can be installed in the air intake pipe 7, so that external gas can only enter under the pressure plate 13 through the air intake pipe 7. This structure can prevent the slurry in the fault from being brought into the guide pipe 3 when the pressure plate 13 moves upward.

[0055] The inner wall of the connecting pipe 201 is provided with a ball groove for mounting the ball 14;

[0056] A positioning block 1301 can be fixedly installed on the outer peripheral wall of the pressure plate 13, and a positioning groove that slidably cooperates with the positioning block 1301 is opened on the inner wall of the barrel 2. This structure can prevent the pressure plate 13 from rotating relative to the barrel 2.

[0057] Reference Figure 13 As shown, the inner top surface of the slide groove 1304 is provided with a slot for installing the electromagnet 21, and the electromagnet 21 is fixedly arranged at the inner bottom end of the slot, and the above-mentioned block 20 slides in the slot, and a supporting spring is fixedly arranged between the electromagnet 21 and the block 20.

[0058] Reference Figure 5 As shown, a groove which is slidably matched with the limit block 602 is opened on the outer wall of the sealing plate 6, and a limit spring is fixedly arranged between the inner end surface of the groove and the limit block 602.

[0059] Reference Figure 6 As shown, a first spring is fixedly arranged between the top wall of the inner cavity of the mounting groove and the end face of the connecting block 16, and the above-mentioned detection unit 17 can be a pressure sensor. In actual use, the number of pressure sensors can be set to two, and the two pressure sensors are used to control the electromagnet 21 and the motor 10 respectively.

[0060] Reference Figures 8 - 9As shown, the above-mentioned telescopic rod 19 specifically includes a sleeve rod and a sliding rod. One end of the sliding rod slides inside the sleeve rod, and a second spring is fixedly arranged between the sliding rod and the inner end face of the sleeve rod. One end of the sleeve rod can be fixedly connected to the stopper 18, while one end of the sliding rod is fixedly connected to the slider 603.

Claims

1. An efficient grouting device for coal mine fault grouting, comprising a barrel and a pressure plate sliding inside the barrel, the top of the pressure plate is rotatably connected to a sealing plate, and the sealing plate and the pressure plate are elastically matched, the bottom of the barrel is integrally formed with a connecting pipe, and a ball is assembled in the connecting pipe, characterized in that: A plurality of first circular holes and second circular holes are evenly formed on the pressure plate, and a plurality of through holes are evenly formed on the sealing plate. The sealing plate and the barrel are matched with each other through a limiting assembly, and the limiting assembly enables the sealing plate to rotate relative to the pressure plate during the movement in the vertical direction; The sealing plate and the pressure plate are matched with each other through a clamping assembly. When the pressure plate is blocked in the process of squeezing the slurry, the clamping assembly can release the limit of the sealing plate, so that the through hole on the sealing plate is aligned with the second circular hole on the pressure plate. When the pressure plate is pressed, the ball can rotate relative to the connecting pipe, so that the external water source can be introduced into the connecting pipe through the ball and finally sprayed out through the top of the connecting pipe. A slider is fixedly arranged on the bottom surface of the sealing plate, and an annular slide groove is provided on the top surface of the pressure plate. The slider is slidably arranged in the slide groove, and the cross sections of the slider and the slide groove are both arranged in a T shape. A stopper is fixedly installed in the slide groove, and an elastic telescopic rod is fixedly arranged between the stopper and the slider; The clamping assembly includes a clamping block arranged on the bottom surface of the inner part of the slide groove, the clamping block can move in the vertical direction relative to the pressure plate, the clamping block is located on the side of the slider away from the stopper, and the side of the clamping block away from the slider is set as an inclined surface, and when the through hole is between the first circular hole and the second circular hole, the slider can fit on one side of the clamping block; A motor is fixedly mounted on the side wall of the connecting pipe, and a connecting rod is mounted on the output end of the motor. The connecting rod passes through the connecting pipe and is fixedly connected to the sphere; The top surface of the pressure plate is provided with an installation groove, in which a connecting block is elastically arranged, an electromagnet matching with the card block is arranged on the pressure plate, and the card block is made of iron, and a detection unit is installed on the bottom surface of the installation groove, and the detection unit is used to control the electromagnet and the motor.

2. The high-efficiency grouting device for coal mine fault grouting according to claim 1, characterized in that: The sphere is provided with a through flow diversion channel, both ends of which extend to the spherical surface of the sphere respectively, and the sphere is provided with a flow diversion hole, the flow diversion hole and the flow diversion channel are in a perpendicular state, the bottom end of the flow diversion hole is connected to the flow diversion channel, and the top end of the flow diversion hole extends to the spherical surface of the sphere.

3. The high-efficiency grouting device for coal mine fault grouting according to claim 2, characterized in that: The limiting assembly includes a limiting block arranged on the outer peripheral wall of the sealing plate and elastically matched with the sealing plate. An inclined limiting groove is opened on the inner wall of the barrel near the top. The end of the limiting block close to the barrel is set as an inclined extrusion surface.

4. The high-efficiency grouting device for coal mine fault grouting according to claim 1, characterized in that: The cross sections of the installation groove and the connection block are both arranged to be T-shaped.

5. The high-efficiency grouting device for coal mine fault grouting according to claim 1, characterized in that: A boss is installed on the top surface of the connecting block, a turntable is arranged above the barrel, the turntable and the boss are arranged coplanarly, and a connecting rod is hinged between the boss and the turntable, and the position where the connecting rod and the turntable are hinged is at the edge of the turntable.

6. A method for grouting using the high-efficiency grouting device for coal mine fault grouting as claimed in any one of claims 1 to 5, characterized in that: The method comprises the following steps: introducing slurry into a barrel so that the slurry enters below the pressure plate through the through hole and the first circular hole; driving the pressure plate to move downward to squeeze the slurry into the fault of the coal mine; when the pressure plate is obstructed in the process of squeezing the slurry, water can be introduced into the connecting pipe through the sphere and sprayed upward, so that the stones blocking the connecting pipe are pushed to the bottom surface of the barrel; as the pressure plate continues to move downward, the stones can be crushed.

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