A directional grouting plugging device

Abstract

The application discloses a directional grouting plugging device, and belongs to the field of coal mine water prevention and control equipment. The device comprises a rod body, a cavity, an air bag, a piston, a driving rod, a driving structure, a flow channel and a positioning structure. At least two air bag structures are arranged on the rod body, which can isolate independent grouting areas in the borehole. In combination with the flow channel arranged on the rod body, the slurry can be accurately guided to the isolated area, avoiding the diffusion of the slurry, so that directional and accurate grouting is realized, and the grouting pressure is effectively established in the target area. Meanwhile, the piston can slide in the cavity through the driving structure, so that the expansion degree of the air bag is adjusted, different boreholes with different diameters can be adapted, and the sealing and fitting effect of the air bag and the hole wall is ensured. In addition, the positioning structure can stably fix the rod body at the borehole opening, so that displacement of the rod body during grouting is avoided, the accuracy of the grouting position is ensured, the overall structure is simple and reliable, and the efficiency and effect of the grouting plugging operation can be effectively improved.

Description

Technical Field

[0001] This application relates to the field of coal mine water control equipment, and in particular to a directional grouting sealing device. Background Technology

[0002] Coal mine underground water control refers to specialized technical work conducted during underground coal mining to prevent and manage mine water hazards, avoid groundwater inrush into the working face, and ensure the safety and efficiency of underground operations. As coal mining depths increase and geological conditions become more complex, numerous water-conducting fissures and concealed aquifers often exist in the surrounding rock strata. These structures can form groundwater channels, causing groundwater to inrush into the working face, triggering water inrush accidents that seriously threaten the lives of workers and significantly impact the progress of mining operations.

[0003] Grouting is a core technology for water control in coal mines. It involves drilling a hole at the target location and then injecting a prepared grout into the hole. Once the grout solidifies, it fills the water-conducting fissures in the rock strata, sealing the water inflow channels and blocking the path of groundwater inflow. It is the most common and effective technology for controlling water inflow from roadway fissures.

[0004] However, in the existing technology, most of the sealing operations for this type of fissure water inflow adopt the traditional full-hole grouting method. After the operator inserts the grouting pipe into the borehole, he directly injects grout into the entire borehole and relies on the natural diffusion of the grout to fill the target fissure.

[0005] This sealing method has poor positioning accuracy, making it impossible for operators to precisely limit the grouting position to the corresponding location of the target fracture. On the other hand, the consumption of grout is extremely large. After the grout is injected into the borehole, it will freely diffuse along the borehole axis to both the upper and lower ends. It will not only fill the target fracture, but also fill a large amount of borehole areas that do not need to be sealed and non-target fractures, resulting in waste of grout and increasing the cost of the operation.

[0006] Application content

[0007] The purpose of this application is to address the problems raised in the background art by designing a directional grouting sealing device.

[0008] The technical solution of this application to achieve the above objectives is a directional grouting and sealing device, comprising a rod body, a cavity, air bladders, a piston, a drive rod, a drive structure, a flow channel, and a positioning structure. The rod body has a cavity, at least two air bladders are arranged around the rod body and fixed to one end of the cavity, the piston is slidably disposed in the cavity, and the drive rod is slidably installed in the rod body with one end fixed to the piston and the other end installed on the drive structure.

[0009] The rod body has a flow channel, the inlet of the flow channel is located at the upper end of the rod body, and the outlet is located between the two air bladders, which is used to guide the slurry from the outside to the position between the two air bladders.

[0010] The drive structure is mounted on the rod and is used to drive the piston to slide in the cavity and to inflate or deflate the airbag.

[0011] The positioning structure is installed on the rod body and is used to fix the rod body at the borehole opening.

[0012] Furthermore, the driving structure includes a rotating shaft, a limiting structure, a driving disk, and an inclined surface. The rotating shaft is rotatably mounted on the rod body, and the limiting structure is mounted on the rotating shaft. The limiting structure is used to lock the rotating state of the rotating shaft. The driving disk is located inside the rod body and fixed on the rotating shaft. The edge of the driving disk has an inclined surface, and the end of the driving rod is in contact with the inclined surface.

[0013] Furthermore, the limiting structure includes a ratchet, a pressing rod, a torsion spring, a ratchet tooth, and a return spring. The ratchet is located inside the rod body and fixed on the rotating shaft. The pressing rod is slidably mounted on the rod body. The torsion spring is fitted on the rotating shaft and fixedly connected at one end to the rod body and at the other end to the rotating shaft. The ratchet tooth is fixed on the pressing rod and meshes with the ratchet. The return spring is fitted on the pressing rod and fixedly connected at one end to the rod body and at the other end to the pressing rod.

[0014] Furthermore, the positioning structure includes a positioning rack, a bearing, a positioning ring, a sliding rod, a short rack, and a positioning spring. The positioning rack is fixed on both sides of the rod body. The bearing is located outside the rod body and is slidably mounted on the rod body. The positioning ring is fixed inside the bearing. The sliding rod is slidably mounted on the positioning ring. The short rack is fixed on the sliding rod and meshes with the positioning rack. The positioning spring is fitted onto the sliding rod, with one end fixedly connected to the sliding rod and the other end fixedly connected to the positioning ring.

[0015] Furthermore, the rod body is provided with a reinforcing structure, which is installed on the rod body to assist in supporting the stability of the rod body.

[0016] Furthermore, the reinforcing structure includes an insert block, which is slidably installed in the rod body and fixedly connected at one end to the drive rod.

[0017] Furthermore, the end of the insert is provided with anti-slip teeth, which are located at the end of the insert facing the hole wall.

[0018] Furthermore, a pressure sensor is provided on the rod body, and the pressure sensor is fixed on the surface of the rod body and located between the two airbags.

[0019] Furthermore, the airbag is made of elastic rubber with a sealing and anti-slip texture on its surface.

[0020] In summary, this application provides a directional grouting and sealing device with the following advantages: Through its structural design, this device utilizes at least two air bladder structures on the rod to isolate an independent grouting area within the borehole. Combined with the flow channels on the rod, the grout can be precisely guided to this isolated area, effectively preventing grout leakage and diffusion, thereby achieving precise directional grouting and ensuring that the grouting pressure is effectively established in the target area. Simultaneously, the driving structure allows the piston to slide within the cavity, thereby adjusting the expansion degree of the air bladders, adapting to boreholes of different diameters and ensuring a tight seal between the air bladders and the borehole wall. Furthermore, the positioning structure can stably fix the rod at the borehole opening, preventing displacement during grouting and ensuring the accuracy of the grouting position. The overall structure is simple and reliable, effectively improving the efficiency and effectiveness of grouting and sealing operations. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the directional grouting sealing device described in this application;

[0022] Figure 2 This is a front structural schematic diagram of a directional grouting sealing device described in this application;

[0023] Figure 3 This is a side view of the directional grouting sealing device described in this application;

[0024] Figure 4 This is as described in this application. Figure 2 A schematic diagram of the cross-sectional structure at point AA is shown.

[0025] Figure 5 This is as described in this application. Figure 2 A magnified internal structure diagram at point B shown;

[0026] Figure 6 This is as described in this application. Figure 3 A magnified internal structure diagram at point A is shown.

[0027] In the diagram, 1. Rod; 2. Cavity; 3. Airbag; 4. Piston; 5. Drive rod; 6. Drive structure; 7. Flow channel; 8. Positioning structure; 61. Rotating shaft; 62. Limiting structure; 63. Drive disc; 64. Inclined surface; 621. Ratchet; 622. Pressing rod; 623. Torsion spring; 624. Ratchet; 625. Return spring; 81. Positioning rack; 82. Bearing; 83. Positioning ring; 84. Sliding rod; 85. Short rack; 86. Positioning spring; 9. Reinforcing structure; 91. Insert block; 10. Anti-slip teeth; 11. Pressure sensor. Detailed Implementation

[0028] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The examples given are only for explaining this application and are not intended to limit the scope of this application.

[0029] Please see Figure 1-6 This application provides a technical solution: a directional grouting sealing device, including a rod body 1, a cavity 2, an air bladder 3, a piston 4, a drive rod 5, a drive structure 6, a flow channel 7, and a positioning structure 8. The rod body 1 has a cavity 2 inside, at least two air bladders 3 are arranged around the rod body 1 and fixed to one end of the cavity 2, the piston 4 is slidably arranged in the cavity 2, and the drive rod 5 is slidably installed in the rod body 1 with one end fixed to the piston 4 and the other end installed on the drive structure 6.

[0030] The rod body 1 has a flow channel 7. The inlet of the flow channel 7 is located at the upper end of the rod body 1, and the outlet is located between the two air bags 3. This is used to guide the slurry from the outside to the position between the two air bags 3.

[0031] The drive structure 6 is mounted on the rod 1 and is used to drive the piston 4 to slide in the cavity 2 and to inflate or deflate the airbag 3.

[0032] Positioning structure 8 is installed on rod 1 and is used to fix rod 1 at the borehole opening.

[0033] In this application, the drive structure 6 includes a rotating shaft 61, a limiting structure 62, a drive disc 63, and an inclined surface 64. The rotating shaft 61 is rotatably mounted on the rod body 1, and the limiting structure 62 is mounted on the rotating shaft 61. The limiting structure 62 is used to lock the rotation state of the rotating shaft 61. The drive disc 63 is located inside the rod body 1 and fixed on the rotating shaft 61. The edge of the drive disc 63 has an inclined surface 64, and the end of the drive rod 5 is in contact with the inclined surface 64. By rotating the drive disc 63 through the rotating shaft 61, the drive rod 5 can be pushed to complete the displacement, thereby realizing the expansion adjustment of the airbag 3. At the same time, the limiting structure 62 can lock the state of the rotating shaft 61, ensuring the stability of the airbag 3 after expansion, and maintaining the sealing state without the need for continuous force from the operator.

[0034] In this application, the limiting structure 62 includes a ratchet 621, a pressing rod 622, a torsion spring 623, a ratchet tooth 624, and a return spring 625. The ratchet 621 is located inside the rod body 1 and fixed on the rotating shaft 61. The pressing rod 622 is slidably mounted on the rod body 1. The torsion spring 623 is fitted on the rotating shaft 61 and one end is fixedly connected to the rod body 1, and the other end is fixedly connected to the rotating shaft 61. The ratchet tooth 624 is fixed on the pressing rod 622 and meshes with the ratchet 621. The return spring 625 is fitted on the pressing rod 622 and one end is fixedly connected to the rod body 1, and the other end is fixedly connected to the pressing rod 622. The ratchet 621 and ratchet 624 work together to achieve one-way locking of the rotating shaft 61. The operator only needs to rotate the rotating shaft 61 in one direction to gradually inflate the airbag 3. The operation is simple. At the same time, the torsion spring 623 can automatically drive the rotating shaft 61 to reset after the lock is released. The airbag 3 can be quickly retracted without manually reversing the rotating shaft 61.

[0035] In this application, the positioning structure 8 includes a positioning rack 81, a bearing 82, a positioning ring 83, a sliding rod 84, a short rack 85, and a positioning spring 86. The positioning rack 81 is fixed to both sides of the rod body 1. The bearing 82 is located outside the rod body 1 and slidably mounted on the rod body 1. The positioning ring 83 is fixed inside the bearing 82. The sliding rod 84 is slidably mounted on the positioning ring 83. The short rack 85 is fixed on the sliding rod 84 and meshes with the positioning rack 81. The positioning spring 86 is fitted onto the sliding rod 84, with one end fixedly connected to the sliding rod 84 and the other end fixedly connected to the positioning ring 83. This allows for position adjustment and quick locking of the rod body 1 within the borehole. Operators can flexibly adjust the vertical position of the rod body 1 according to the location of the fissure, thereby changing the position of the grout outlet of the flow channel 7. Simultaneously, the bearing 82 allows the rod body 1 to rotate circumferentially, improving the accuracy of grouting and adapting to the sealing needs of fissures in different locations.

[0036] In this application, the rod 1 is provided with a reinforcing structure 9, which is installed on the rod 1 to help support the stability of the rod 1.

[0037] In this application, the reinforcing structure 9 includes an insert block 91, which is slidably installed inside the rod body 1 and fixedly connected at one end to the drive rod 5. The insert block 91 can be triggered synchronously with the expansion action of the airbag 3. While the airbag 3 completes the sealing of the hole wall, it automatically completes the auxiliary support of the rod body 1. Without additional operation steps, it can improve the stability of the rod body 1 under high-pressure grouting conditions, prevent the rod body 1 from shaking during grouting, and ensure the stability of the grouting pressure.

[0038] In this application, the end of the insert 91 is provided with anti-slip teeth 10, which are located at the end of the insert 91 facing the hole wall. The anti-slip teeth 10 can increase the friction between the insert 91 and the borehole wall, prevent the insert 91 from sliding under the action of grouting pressure, ensure the stability of the auxiliary support, and prevent the rod 1 from displacing due to support failure.

[0039] In this application, a pressure sensor 11 is provided on the rod body 1. The pressure sensor 11 is fixed on the surface of the rod body 1 and located between the two air bladders 3. The pressure sensor 11 can monitor the pressure parameters of the grouting area in real time. Before the operation, the pressure sensor 11 can sense the change in water pressure to help the operator accurately locate the crack. During the grouting process, the change in grouting pressure can be monitored in real time, which makes it convenient for the operator to adjust the grouting parameters to ensure the safety of the operation and the sealing effect.

[0040] In this application, the airbag 3 is made of elastic rubber with sealing and anti-slip textures on its surface. The elastic rubber material of the airbag 3 provides excellent elasticity and expansion properties, ensuring that it can fully expand and conform to the borehole walls of different diameters, achieving a good sealing effect. The sealing and anti-slip textures on the surface increase the friction between the airbag 3 and the borehole wall, improving the stability of the seal, preventing displacement of the airbag 3 during grouting, and ensuring the sealing effect of the sealing area.

[0041] In this implementation plan: During operation, first clean the debris and loose coal at the borehole opening to ensure that the opening is flat and to prevent the positioning structure 8 from being unstable. Also, confirm the location of the cracks in the borehole wall where water seepage occurs. Then, the operator slowly inserts the rod 1 into the borehole and fixes the positioning structure 8 to the ground. During the insertion process, avoid violent collisions between the rod 1 and the borehole wall to prevent damage to the device.

[0042] After insertion, the operator pulls the sliding rod 84 on the positioning ring 83, causing the sliding rod 84 to drive the short rack 85 to move outward against the elastic force of the positioning spring 86, so that the short rack 85 disengages from the positioning rack 81 on the rod body 1. At this time, the inner ring of the bearing 82 can slide freely along the axial direction of the rod body 1, and the operator can adjust the position of the rod body 1 up and down. At the same time, the inner ring can rotate relative to the outer ring, and the operator can also rotate the rod body 1 to adjust the rotation angle of the rod body 1.

[0043] During the adjustment process, the operator can also check the feedback value of the pressure sensor 11. When the value of the pressure sensor 11 changes significantly, it indicates that the pressure sensor 11 has been aligned with the water outlet position of the fissure. At this time, the adjustment is stopped, the sliding rod 84 is released, and the sliding rod 84 is reset under the elastic force of the positioning spring 86, which drives the short rack 85 to re-engage with the positioning rack 81, locking the positioning ring 83 in the current position of the rod body 1. At this time, the positioning ring 83 fits against the borehole opening, completing the positioning and fixing of the rod body 1, ensuring that the slurry outlet of the flow channel 7 is accurately aligned with the target fissure.

[0044] After positioning is completed, the drive structure 6 is activated to inflate the airbag 3. The operator manually rotates the rotating shaft 61 at the upper end of the rod 1. When the rotating shaft 61 rotates, it drives the drive disk 63 to rotate synchronously. As the drive disk 63 rotates, the inclined surface 64 on the edge gradually pushes the drive rod 5 towards the cavity 2. At the same time as the drive rod 5 moves, it drives the piston 4 at its front end to slide synchronously in the cavity 2. The piston 4 squeezes the gas in the cavity 2 towards the airbag 3. The gas enters the airbag 3 and causes the airbag 3 to inflate synchronously.

[0045] At the same time, as the drive rod 5 moves, it also drives the reinforcing structure 9 to assist in the stability of the rod body 1. The movement of the drive rod 5 causes the insert block 91 to move synchronously to the outside of the rod body 1. The insert block 91 extends out from the side wall opening of the rod body 1 and is inserted into the hole wall of the drilled hole. The anti-slip teeth 10 at the end of the insert block 91 fits tightly with the hole wall, forming radial auxiliary support for the rod body 1 and improving the stability of the rod body 1.

[0046] When the airbag 3 inflates to completely fit the borehole wall, the rotating shaft 61 stops rotating. Under the action of the limiting structure 62, the rotating shaft 61 will maintain its current rotational position and state. At this time, the ratchet 624 in the limiting structure 62 engages with the ratchet 621, forming a one-way lock on the rotating shaft 61, preventing the rotating shaft 61 from reversing under the pressure of the airbag 3, thereby ensuring that the position of the piston 4 is fixed, the inflated state of the airbag 3 is maintained, and the borehole is sealed. At this time, the area between the two airbags 3 is completely sealed, forming an independent grouting space.

[0047] Subsequently, the operators injected the prepared grout into the flow channel 7. The grout flowed downward along the flow channel 7 and finally flowed out from the grout outlet between the two airbags 3, into the sealed grouting space, and filled the target crack.

[0048] During the grouting process, the pressure sensor 11 monitors the pressure in the grouting space in real time. The operator can adjust the grouting pressure and grouting volume of the grouting pump according to the feedback value of the pressure sensor 11. When the pressure reaches the preset threshold, the grouting is stopped and the grout is allowed to solidify.

[0049] After grouting is completed, the operator presses the pressing rod 622 on the body of the pressing rod 622. The pressing rod 622 moves against the elastic force of the return spring 625, causing the ratchet 624 to disengage from the ratchet 621 and release the lock on the rotating shaft 61. At this time, the elastic force of the torsion spring 623 causes the rotating shaft 61 to rotate in the opposite direction, the drive disc 63 rotates in the opposite direction, the inclined surface 64 is reset, and the drive rod 5 is reset backward under the action of the gas pressure inside the airbag 3. The gas inside the airbag 3 flows back into the cavity 2, the airbag 3 deflates, and at the same time, the insert block 91 is also retracted into the rod body 1 under the action of the drive rod 5.

[0050] Once the airbag 3 is completely deflated, release the pressing rod 622. The return spring 625 will drive the pressing rod 622 to reset. The reset of the pressing rod 622 will cause the ratchet 624 to re-engage with the ratchet 621, restoring the limit on the rotating shaft 61. The operator will then pull the rod 1 to remove the device from the borehole, completing the entire grouting and sealing operation.

[0051] The foregoing has provided a detailed description of one embodiment of this application, but the description is merely a preferred embodiment and should not be construed as limiting the scope of this application. All equivalent variations and improvements made within the scope of this application should still fall within the patent coverage of this application.

Claims

1. A directional grouting plugging device, comprising a rod body (1), a cavity (2), an air bag (3), a piston (4), a driving rod (5), a driving structure (6), a flow channel (7), a positioning structure (8), characterized in that, The rod (1) has a cavity (2) inside, at least two airbags (3) are arranged around the rod (1) and fixed at one end of the cavity (2), the piston (4) is slidably arranged in the cavity (2), the drive rod (5) is slidably installed in the rod (1) and one end is fixed on the piston (4), and the other end is installed on the drive structure (6); The rod (1) has a flow channel (7), the inlet of the flow channel (7) is located at the upper end of the rod (1), and the outlet is located between the two air bags (3), which is used to guide the slurry from the outside to the position between the two air bags (3). The drive structure (6) is mounted on the rod (1) and is used to drive the piston (4) to slide in the cavity (2) and to inflate or deflate the airbag (3); The positioning structure (8) is installed on the rod (1) and is used to fix the rod (1) at the borehole opening.

2. The directional grouting sealing device according to claim 1, characterized in that, The drive structure (6) includes a rotating shaft (61), a limiting structure (62), a drive disk (63), and an inclined surface (64). The rotating shaft (61) is rotatably mounted on the rod body (1). The limiting structure (62) is mounted on the rotating shaft (61) and is used to lock the rotating state of the rotating shaft (61). The drive disk (63) is located inside the rod body (1) and fixed on the rotating shaft (61). The edge of the drive disk (63) has an inclined surface (64), and the end of the drive rod (5) is in contact with the inclined surface (64).

3. The directional grouting sealing device according to claim 2, characterized in that, The limiting structure (62) includes a ratchet (621), a pressing rod (622), a torsion spring (623), a ratchet tooth (624), and a return spring (625). The ratchet (621) is located inside the rod body (1) and fixed on the rotating shaft (61). The pressing rod (622) is slidably mounted on the rod body (1). The torsion spring (623) is fitted on the rotating shaft (61) and one end is fixedly connected to the rod body (1), and the other end is fixedly connected to the rotating shaft (61). The ratchet tooth (624) is fixed on the pressing rod (622) and meshes with the ratchet (621). The return spring (625) is fitted on the pressing rod (622) and one end is fixedly connected to the rod body (1), and the other end is fixedly connected to the pressing rod (622).

4. The directional grouting sealing device according to claim 1, characterized in that, The positioning structure (8) includes a positioning rack (81), a bearing (82), a positioning ring (83), a sliding rod (84), a short rack (85), and a positioning spring (86). The positioning rack (81) is fixed on both sides of the rod body (1). The bearing (82) is located outside the rod body (1) and is slidably mounted on the rod body (1) on its inner side. The positioning ring (83) is fixed inside the bearing (82). The sliding rod (84) is slidably mounted on the positioning ring (83). The short rack (85) is fixed on the sliding rod (84) and meshes with the positioning rack (81). The positioning spring (86) is fitted onto the sliding rod (84) and is fixedly connected at one end to the sliding rod (84) and at the other end to the positioning ring (83).

5. A directional grouting sealing device according to claim 1, characterized in that, The rod (1) is provided with a reinforcing structure (9), which is installed on the rod (1) to help support the stability of the rod (1).

6. A directional grouting sealing device according to claim 5, characterized in that, The reinforcing structure (9) includes a plug (91), which is slidably installed inside the rod body (1) and has one end fixedly connected to the drive rod (5).

7. A directional grouting sealing device according to claim 6, characterized in that, The end of the insert (91) is provided with anti-slip teeth (10), and the anti-slip teeth (10) are located at the end of the insert (91) facing the hole wall.

8. The directional grouting sealing device according to claim 1, characterized in that, A pressure sensor (11) is provided on the rod (1), and the pressure sensor (11) is fixed on the surface of the rod (1) and located between the two airbags (3).

9. A directional grouting sealing device according to claim 1, characterized in that, The airbag (3) is made of elastic rubber with a sealing and anti-slip texture on its surface.

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