Efficient grouting device and grouting method for coal mine fault grouting

Abstract

The invention discloses an efficient grouting device for coal mine fault grouting and a grouting method, and belongs to the technical field of grouting device.The efficient grouting device for coal mine fault grouting comprises a charging barrel and a pressing disc sliding in the charging barrel, the top of the pressing disc is rotationally connected with a sealing plate, and the sealing plate is elastically matched with the pressing disc; a connecting pipe is integrally formed at the bottom end of the charging barrel, and a ball body is assembled in the connecting pipe; according to the device, through cooperation of a sealing plate and a pressing plate, when the top end of a connecting pipe is blocked by stone blocks and slurry filling is affected, and in the downward moving process of the pressing plate and the sealing plate, a second round hole can be aligned with a through hole, so that water flow can be upwards sprayed out through a ball and the connecting pipe, and then the blocked stone blocks are pushed to the bottom face of a charging barrel; stone blocks can be crushed along with downward movement of the pressure plate, so that the stone blocks are prevented from continuously blocking the connecting pipe, and normal conveying of slurry is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of grouting devices, and in particular to a high-efficiency grouting device and a grouting method for coal mine fault grouting. Background Art

[0002] Due to the presence of coal gas and the movement of the earth's crust, cracks will form in some coal seams, which will make the coal seams less stable. Therefore, when excavating coal mines to mine coal seams, it is necessary to seal the potentially dangerous coal seam cracks first to stabilize the coal seams.

[0003] Chinese patent CN113738302B discloses a fissure grouting plugging device for coal seams. As the pull ring rotates, the threaded connection between the bolt and the inner wall of the main rod is released. At this time, the slide rod together with the bolt and the bottom cone can be pulled out from the air hole. The air hole connects the coal seam fissure below with the upper part, so that the coal gas in the coal seam can leak upward through the air hole to avoid the continuous accumulation of coal gas blocked in the coal seam blocked by slurry.

[0004] The above-mentioned device has multiple vertical holes on the main rod, and the slurry is transported through the vertical holes. However, in actual use, when large stones are blocked in the vertical holes, the stones will be squeezed into the vertical holes during the downward movement of the piston, thereby causing the vertical holes to be blocked, which is not conducive to the stable transportation of the slurry. In summary, the above-mentioned device still has room for improvement.

[0005] Therefore, it is necessary to provide a high-efficiency grouting device and grouting method for coal mine fault grouting to solve the above-mentioned technical problems. Summary of the invention

[0006] The object of the present invention is to provide a high-efficiency grouting device and a grouting method for coal mine fault grouting, so as to solve the problem that the existing device proposed in the above background technology has multiple vertical holes on the main rod, and the slurry is transported through the vertical holes, but in actual use, when large stones are blocked in the vertical holes, the stones will be squeezed into the vertical holes during the downward movement of the piston, thereby causing the vertical holes to be blocked, which is not conducive to the stable transportation of the slurry.

[0007] Based on the above ideas, the present invention provides the following technical solutions: a high-efficiency grouting device for coal mine fault grouting, comprising a barrel and a pressure plate sliding inside the barrel, a sealing plate rotatably connected to the top of the pressure plate, and the sealing plate and the pressure plate are elastically matched, a connecting pipe is integrally formed at the bottom of the barrel, a sphere is assembled in the connecting pipe, a plurality of first circular holes and second circular holes are evenly opened on the pressure plate, a plurality of through holes are evenly opened on the sealing plate, the sealing plate and the barrel are matched by 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 obstructed in the process of squeezing the slurry, the clamping assembly can release the limit on 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 under pressure, 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 through the top end of the connecting pipe.

[0008] As a further solution of the present invention: a through-flow guide channel is provided on the sphere, and both ends of the guide channel extend to the spherical surface of the sphere respectively, and a guide hole is provided on the sphere, the guide hole and the guide channel are in a perpendicular state, the bottom end of the guide hole is connected to the guide channel, and the top end of the guide hole extends to the spherical surface of the sphere.

[0009] As a further solution of the present invention: a slider is fixedly provided on the bottom surface of the sealing plate, an annular slide groove is opened on the top surface of the pressure plate, the slider is slidably set in the slide groove, and the cross-sections of the slider and the slide groove are both set to T-shape, a stopper is fixedly installed in the slide groove, and an elastic telescopic rod is fixedly provided between the stopper and the slider.

[0010] As a further solution of the present invention: the clamping assembly includes a clamping block arranged on the bottom surface of the inner groove, the clamping block can move in the vertical direction relative to the pressure plate, the clamping block is on the side of the slider away from the stop block, and the side of the clamping block away from the slider is set as an inclined surface, 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.

[0011] As a further solution of the present invention: the limit assembly includes a limit block arranged on the outer peripheral wall of the sealing plate and elastically matched with the sealing plate, an inclined limit groove is opened on the inner wall of the barrel near the top, and the limit block is arranged as an inclined extrusion surface at one end close to the barrel.

[0012] As a further solution of the present invention: a motor is fixedly mounted on the side wall of the connecting pipe, a connecting rod is mounted on the output end of the motor, and the connecting rod passes through the connecting pipe and is fixedly connected to the sphere.

[0013] As a further solution of the present invention: a mounting groove is provided on the top surface of the pressure plate, a connecting block is elastically arranged in the mounting groove, an electromagnet cooperating with the clamping block is arranged on the pressure plate, the clamping block is made of iron, a detection unit is installed on the bottom surface of the mounting groove, and the detection unit is used to control the electromagnet and the motor.

[0014] As a further solution of the present invention: the cross sections of the installation groove and the connection block are both configured to be T-shaped.

[0015] 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 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.

[0016] A method for grouting using the above-mentioned high-efficiency grouting device for coal mine fault grouting includes 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 a sphere and sprayed upward, so that stones blocking the connecting pipe are pushed to the bottom of the barrel; as the pressure plate continues to move downward, the stones can be crushed.

[0017] Compared with the prior art, the beneficial effect of the present invention is that: this device cooperates with the pressure plate through the arranged sealing plate. When the top end of the connecting pipe is blocked by stones and affects the slurry filling, the second circular hole can be aligned with the through hole during the downward movement of the pressure plate and the sealing plate, 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 pressure plate moves downward, the stones can be crushed, thereby preventing the stones from continuing to block the connecting pipe, which is beneficial to the normal transportation of the slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the present invention; Figure 3 The present invention Figure 1 A schematic diagram of the enlarged structure at point A; Figure 4 is a cross-sectional view of a barrel of the present invention; Figure 5 The present invention Figure 4 A schematic diagram of the enlarged structure at B; Figure 6 The present invention Figure 4 A schematic diagram of the enlarged structure at C; Figure 7 It is a schematic diagram of the structure of the first circular hole and the second circular hole of the present invention; Figure 8 It is a schematic diagram of the chute structure of the present invention; Fig. 9 The present invention Figure 8 A schematic diagram of the structure at D of FIG. Fig.10 It is a schematic diagram of the spherical structure of the present invention; Fig.11It is a schematic diagram of the flow guide channel of the present invention being parallel to the connecting pipe; Fig.12 It is a schematic diagram of the flow guide channel of the present invention being perpendicular to the connecting pipe; Fig.13 It is a schematic diagram of the card block structure of the present invention.

[0019] In the figure: 1, fixed plate; 2, barrel; 201, connecting pipe; 202, limiting groove; 3, guide pipe; 4, turntable; 5, connecting rod; 6, sealing plate; 601, through hole; 602, limiting block; 6021, extrusion surface; 603, slider; 7, air inlet pipe; 8, control switch; 9, pressure rod; 10, motor; 11, pump body; 12, liquid inlet pipe; 13, pressure plate; 1301, positioning block; 1302, first circular hole; 1303, second circular hole; 1304, slide groove; 14, sphere; 1401, diversion channel; 1402, diversion hole; 15, connecting rod; 16, connecting block; 1601, boss; 17, detection unit; 18, stopper; 19, telescopic rod; 20, block; 2001, inclined plane; 21, electromagnet; 22, reset switch. DETAILED DESCRIPTION

[0020] like Figure 1-Figure 10 As shown, a high-efficiency grouting device and grouting method for coal mine fault grouting include a barrel 2 and a pressure plate 13 sliding inside the barrel 2. The bottom surface of the barrel 2 and the bottom surface of the pressure plate 13 can be set to a cone. The pressure plate 13 and the barrel 2 are sealed together. A sealing plate 6 is installed on the top of the pressure plate 13. The sealing plate 6 can rotate relative to the pressure plate 13 and the sealing plate 6 and the pressure plate 13 are elastically matched. A plurality of first circular holes 1302 and a plurality of second circular holes 1303 are evenly opened on the pressure plate 13. The first circular holes 1302 and the second circular holes 1303 are evenly opened on the pressure plate 13. The circular holes 1302 and the second circular holes 1303 are staggered, and the sealing plate 6 is evenly provided with a plurality of through holes 601. With this structure, when the through hole 601 is aligned with the first circular hole 1302 or the second circular hole 1303, the material in the barrel 2 can be discharged upward through the pressing plate 13 and the sealing plate 6. When the through hole 601 is between the first circular hole 1302 and the second circular hole 1303 and staggered with the two, the slurry in the barrel 2 can be squeezed downward during the downward movement of the pressing plate 13. Furthermore, a connecting tube 201 is integrally formed at the bottom end of the barrel 2, and the top end of the connecting tube 201 is connected to the barrel 2. A ball 14 is assembled in the connecting tube 201. The connecting tube 201 can be in a conducting or closed state by rotating the ball 14. In order to drive the ball 14 to rotate, a motor 10 is fixedly installed on the side wall of the connecting tube 201 in this solution. A connecting rod 15 is connected to the output end of the motor 10. The connecting rod 15 passes through the connecting tube 201 and is fixedly connected to the ball 14. The connecting rod 15 rotates in cooperation with the connecting tube 201. Reference Figure 10-12As shown, the sphere 14 is provided with a through flow guide channel 1401 along its axial direction, and both ends of the flow guide channel 1401 extend to the spherical surface of the sphere 14 respectively, and the sphere 14 is provided with a flow guide hole 1402, and the flow guide hole 1402 is perpendicular to the flow guide channel 1401. Specifically, the bottom end of the flow guide hole 1402 is connected to the flow guide channel 1401, and the top end of the flow guide hole 1402 extends to the spherical surface of the sphere 14. During normal use, the flow guide channel 1401 is in a state parallel to the connecting tube 201, and the connecting tube 201 is in a conducting state. When the flow guide hole 1402 is in a state parallel to the connecting tube 201, the connecting tube 201 is in a blocked state.

[0021] The sealing plate 6 cooperates with the pressure plate 13 through a snap-fit ​​assembly. When the through hole 601 is between the first circular hole 1302 and the second circular hole 1303, the sealing plate 6 can be locked to the top of the pressure plate 13 through the snap-fit ​​assembly, and the sealing plate 6 cooperates with the barrel 2 through a limiting assembly. When the sealing plate 6 moves upward to a position close to the top of the barrel 2, the limiting assembly is provided to enable the sealing plate 6 to rotate relative to the pressure plate 13 to adjust the position of the through hole 601. In actual use, when a large stone blocks the top of the connecting pipe 201, the pressure plate 13 will be subjected to greater pressure during the downward squeezing process, thereby releasing the snap-fit ​​assembly. The sealing plate 6 is limited. At this time, the sealing plate 6 will rotate relative to the pressure plate 13 so that the through hole 601 is aligned with the second circular hole 1303. In addition, when the pressure plate 13 moves downward and encounters greater 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 transported to the connecting pipe 201 through the sphere 14, the water flows out through the top of the connecting pipe 201, thereby pushing the stones to move to the bottom surface of the barrel 2. Therefore, when the pressure plate 13 moves downward to the bottom end of the barrel 2, the stones can be crushed, which can prevent the stones from continuing to block the top of the connecting pipe 201, which is conducive to the stable output of the slurry.

[0022] like Figure 1-Figure 10 As shown, in order to assemble the sealing plate 6 and the pressure plate 13, a slider 603 is fixedly arranged on the bottom surface of the sealing plate 6, and an annular slide groove 1304 is opened on the top surface of the pressure plate 13, and the slider 603 is slidably arranged in the slide groove 1304, and the cross sections of the slider 603 and the slide groove 1304 are both set to T-shaped, and the sealing plate 6 as a whole is an annular structure; In order to achieve elastic cooperation between the sealing plate 6 and the pressure plate 13, a stopper 18 is fixedly installed in the slide groove 1304, and an elastic telescopic rod 19 is fixedly arranged between the stopper 18 and the slider 603, and the telescopic rod 19 is an arc-shaped structure as a whole.

[0023] The clamping assembly includes a clamping block 20 arranged on the inner bottom surface of the slide groove 1304, and 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 slider 603 away from the stop block 18, and the side of the clamping block 20 away from the slider 603 is set as a slope 2001. Specifically, when the through hole 601 is between the first circular hole 1302 and the second circular hole 1303 and staggered with the two, the slider 603 can be attached to one side of the clamping block 20. At this time, the slider 603 can be limited by the clamping block 20.

[0024] The limiting assembly includes a limiting block 602 arranged on the outer peripheral wall of the sealing plate 6 and elastically matched with the sealing plate 6. An arc-shaped and inclined limiting groove 202 is opened on the inner wall of the barrel 2 near the top. When one end of the limiting block 602 is inserted into the limiting groove 202, the sealing plate 6 can rotate relative to the pressure plate 13 as the sealing plate 6 moves in the vertical direction. Further, refer to Figure 5 As shown, one end of the limit block 602 close to the barrel 2 is set as an inclined extrusion surface 6021. When one end of the limit block 602 is inserted into the limit groove 202, a part of the extrusion surface 6021 can be on the outside of the limit groove 202. Through this structure, when the limit block 602 slides downward relative to the limit groove 202 and the pressure on the bottom edge of the limit groove 202 increases, the limit block 602 can move out of the limit groove 202.

[0025] In order to drive the pressure plate 13 to move up and down in the barrel 2, the present solution is elastically connected with a connecting block 16 at the center of the top surface of the pressure plate 13. Specifically, a mounting groove is opened on the top surface of the pressure plate 13, and the connecting block 16 is in the mounting groove, and the cross-sections of the mounting groove and the connecting block 16 are both set to be T-shaped, and 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, and a turntable 4 is arranged above the barrel 2. The turntable 4 and the boss 1601 are arranged 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. For details, 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.

[0026] Combination Figure 3-Figure 6 , Fig.13As shown, an electromagnet 21 cooperating with a block 20 is provided on the pressure plate 13, and the block 20 is made of iron. When the electromagnet 21 is in a powered state, the electromagnet 21 can attract the block 20 to move downward, and when the electromagnet 21 is in a de-powered state, the block 20 can bounce upward. A detection unit 17 is installed on the bottom surface of the inner part of the installation groove, and the detection unit 17 is used to control the above-mentioned electromagnet 21 and the motor 10. Specifically, when stones block the top of the connecting pipe 201, the pressure plate 13 encounters greater resistance when squeezing the slurry downward. At this time, the connecting block 16 will squeeze the detection unit 17, and the detection unit 17 can cause the electromagnet 21 to be in a powered state, and control the motor 10 to drive the connecting rod 15 to rotate.

[0027] 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 be communicated with the guide channel 1401 on the sphere 14, and a pump body 11 is fixedly installed at the bottom end of the barrel 2, the output end of the pump body 11 is connected to the liquid inlet pipe 12, and the input end of the pump body 11 is connected to the external water tank, and an L-shaped pressure rod 9 is fixedly arranged on the top surface of the sealing plate 6, and a control switch 8 is installed on the outer wall of the barrel 2 and near the top, and the control switch 8 is electrically connected to the above-mentioned pump body 11, and when the through hole 601 is aligned with the second circular hole 1303, the pressure rod 9 can be aligned with the control switch 8 in the vertical direction.

[0028] In actual use, the rotation of the turntable 4 drives the connecting rod 5 to deflect, thereby driving the pressure plate 13 to move upward through the connecting rod 5. When the sealing plate 6 on the top of the pressure plate 13 moves upward to the limit groove 202, the limit block 602 on the peripheral wall of the sealing plate 6 can be inserted into the limit groove 202, so that the sealing plate 6 can rotate as the pressure plate 13 moves upward. When the limit block 602 moves to the top of the limit groove 202, the through hole 601 is aligned with the first circular hole 1302. At this time, the staff can introduce slurry into the barrel 2, and the slurry enters the bottom of the pressure plate 13 through the through hole 601 and the first circular hole 1302. Then, the pressure plate 13 is driven to move downward through the deflection of the connecting rod 5. During this process, the limit block 602 can Move downward along the limit groove 202, so that the sealing plate 6 rotates in the opposite direction. When the slider 603 moves to one side of the block 20, the sealing plate 6 and the pressure plate 13 remain relatively stable, and the through hole 601 is placed between the first circular hole 1302 and the second circular hole 1303 and staggered with the two, so that the pressure plate 13 is in a closed state. When the pressure plate 13 continues to move downward, the sealing plate 6 is locked on the pressure plate 13. Therefore, the pressure between the limit block 602 and the bottom edge of the limit groove 202 increases, so that the limit block 602 can move out of the limit groove 202. As the connecting rod 5 continues to drive the pressure plate 13 to move downward, the pressure plate 13 can squeeze the slurry in the barrel 2 through the connecting pipe 201 and inject it into the fault of the coal mine; When there is a stone blocking the top position of the connecting pipe 201, the pressure plate 13 will encounter greater resistance when squeezing the slurry downward, thereby increasing the pressure of the connecting block 16 on the detection unit 17. When the pressure reaches the set value, the detection unit 17 can prompt the electromagnet 21 to be energized, and the electromagnet 21 can adsorb the block 20 to move downward, so that the block 20 and the slider 603 are offset. 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 circular hole 1303, so that 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 ball 14 to rotate through the connecting rod 15. Fig.12 As shown, when the guide hole 1402 on the sphere 14 is in a state parallel to the connecting pipe 201, the connecting pipe 201 can be blocked by the sphere 14, and when the through hole 601 is aligned with the second circular hole 1303, the pressure rod 9 can be aligned with the control switch 8. Therefore, when the pressure plate 13 moves downward to near the bottom end of the barrel 2, the pressure rod 9 can contact the control switch 8 and start the pump body 11 through the control switch 8. The pump body 11 can draw 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 guide hole 1402. As the liquid is continuously sprayed out from the top of the connecting pipe 201, the stone blocking the top of the connecting pipe 201 will be pushed away and located at the bottom surface of the barrel 2. As the pressure plate 13 continues to move downward, the stone can be crushed, thereby preventing the stone from blocking the connecting pipe 201 again. Afterwards, the connecting rod 5 can drive the pressure plate 13 to move upward and reset. During the upward movement of the sealing plate 6, the limit block 602 can slide along the limit groove 202, so that the sealing plate 6 rotates relative to the pressure plate 13. During this process, the slider 603 will pass over the block 20 through the inclined surface 2001 on the block 20, so that the through hole 601 is aligned with the first circular hole 1302. Figure 6 As shown, a reset switch 22 can be installed on the top wall inside the installation groove. The reset switch 22 is connected to the above-mentioned motor 10 through a signal connection or an electrical connection. When the limit block 602 moves to the top of the limit 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 convenient for the next use.

[0029] To summarize, this device cooperates with the pressure plate 13 through the provided sealing plate 6. When the top of the connecting pipe 201 is blocked by stones and affects the filling of the slurry, during the downward movement of the pressure plate 13 and the sealing plate 6, the second circular hole 1303 can be aligned with the through hole 601, so that the water flow can be sprayed upward through the sphere 14 and the connecting pipe 201, thereby pushing the blocked stones to the bottom surface of the barrel 2. As the pressure plate 13 moves downward, the stones can be crushed, thereby preventing the stones from continuing to block the connecting pipe 201, which is beneficial to the normal transportation of the slurry.

[0030] like Figure 1-Figure 12 As shown, two groups of brackets are fixedly installed on the outer wall of the barrel 2, and a fixed plate 1 is fixedly installed at one end of the bracket. The fixed plate 1 can be connected to the mechanical arm on the crawler vehicle. The bottom end of the connecting pipe 201 is connected to a material guide pipe 3. Through this structure, it is beneficial to drive the device to move as a whole and insert the material guide pipe 3 into the corresponding fault for grouting operations.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] The inner wall of the connecting pipe 201 is provided with a ball groove for mounting the ball 14; 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.

[0036] Reference Fig.13As 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.

[0037] 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.

[0038] 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.

[0039] Reference Figure 8-Figure 9 As shown, the telescopic rod 19 specifically includes a sleeve rod and a slide rod, one end of the slide rod slides in the sleeve rod, and a second spring is fixedly arranged between the slide rod and the inner end surface of the sleeve rod, one end of the sleeve rod can be fixedly connected to the stopper 18, and one end of the slide 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 obstructed in the process of squeezing the slurry, the clamping assembly can release the limit on 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 under pressure, 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 through the top end of the connecting pipe.

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: A slider is fixedly provided on the bottom surface of the sealing plate, and an annular slide groove is opened on the top surface of the pressure plate. The slider is slidably set in the slide groove, and the cross-sections of the slider and the slide groove are both set to T-shape. A stopper is fixedly installed in the slide groove, and an elastic telescopic rod is fixedly provided between the stopper and the slider.

4. The high-efficiency grouting device for coal mine fault grouting according to claim 3, characterized in that: The clamping assembly includes a clamping block arranged on the bottom surface of the inner groove, and 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 stop block, and the side of the clamping block away from the slider is set as an inclined surface. 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.

5. The high-efficiency grouting device for coal mine fault grouting according to claim 4, 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.

6. The high-efficiency grouting device for coal mine fault grouting according to claim 4, characterized in that: A motor is fixedly mounted on the side wall of the connecting pipe, a connecting rod is mounted on the output end of the motor, and the connecting rod passes through the connecting pipe and is fixedly connected to the sphere.

7. The high-efficiency grouting device for coal mine fault grouting according to claim 6, characterized in that: 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.

8. The high-efficiency grouting device for coal mine fault grouting according to claim 7, characterized in that: The cross sections of the installation groove and the connection block are both arranged to be T-shaped.

9. The high-efficiency grouting device for coal mine fault grouting according to claim 7, 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.

10. A method for grouting using the high-efficiency grouting device for coal mine fault grouting as claimed in any one of claims 1 to 9, 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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