A grouting plugging device based on fault water disaster prevention

Abstract

This invention discloses a grouting and sealing device for fault water hazard prevention, relating to the field of underground grouting and sealing technology in coal mines. It includes a grouting component body with a feed pipe fixedly installed on its inner surface. The grouting component body is equipped with at least two sealing mechanisms. Through the arrangement of these sealing mechanisms, when encountering a gourd-shaped borehole, the segmented arrangement of the first and second expansion capsules allows the external air supply end to inflate the first expansion capsule. With the cooperation of the connecting and limiting components, the first and second expansion capsules are positioned in the larger and smaller diameter areas of the gourd shape, respectively. This allows the first and second expansion capsules to expand to appropriate sizes after expansion, respectively, to cooperate with different areas during sealing. This avoids poor contact with the gourd-shaped borehole wall during sealing, increases the sealing contact area with the borehole wall, and ensures the sealing effect during grouting and sealing.

Description

Technical Field

[0001] This invention relates to the field of underground grouting and sealing technology in coal mines, specifically to a grouting and sealing device based on fault water hazard prevention and control. Background Technology

[0002] Fault water hazards refer to the disasters caused by underground faults and their affected zones becoming channels for the collection, storage, and diversion of high-pressure groundwater under natural or engineering disturbances, such as water inrush, well flooding, and tunnel flooding. In order to change the geological conditions, grouting and sealing devices are needed to grout and modify the rock strata, thereby transforming the fragile water-conducting geological body into a solid water-resistant body.

[0003] When in use, the existing grouting and sealing device is inserted into a pre-drilled hole in the rock mass. The expandable capsule on the sealing device expands at a fixed point in the hole and fits tightly against the hole wall to form a high-pressure sealed isolation section, ensuring that the grout is injected only into the target area and does not leak out. Then, the grout is transported to the sealing device through a conveying system and flows to the grouting area to carry out the grouting and sealing work.

[0004] While the aforementioned grouting and sealing device can effectively perform grouting and sealing of boreholes, in actual use, due to the uneven hardness of the underlying rock, the drill bit is prone to borehole collapse in soft rock, but maintains the designed borehole diameter in hard rock. Consequently, the drilled hole may form a "gourd-shaped" borehole. Therefore, when the sealing device is in use, and the expansion capsule is located in the "gourd-shaped" area and expands to seal, only a small section in the middle contacts and seals the borehole wall. This disrupts the ideal working conditions for uniform and tight expansion of the sealing capsule, resulting in severely uneven distribution of contact stress around the borehole and reduced sealing effect, which is detrimental to the grouting and sealing work. Summary of the Invention

[0005] In view of this, the present invention proposes a grouting and sealing device based on fault water hazard prevention to solve the problems in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a grouting and sealing device for fault water hazard prevention, comprising a grouting component body, wherein a material conveying pipe is fixedly installed on the inner surface of the grouting component body, and at least two sealing mechanisms are provided on the grouting component body;

[0007] Each of the sealing mechanisms includes at least one fixing ring, which is fixedly connected to the outer surface of the grouting component body. A first expansion capsule is fixedly connected to the outer surface of the fixing ring, and at least one sliding ring is slidably connected to the outer surface of the grouting component body. A second expansion capsule is fixedly connected to the outer surface of the sliding ring, and the second expansion capsule is connected to the first expansion capsule through a connecting pipe.

[0008] The sealing mechanism includes a connecting component and a limiting component. The connecting component is used to connect the sliding ring and the fixed ring. When the first expansion capsule expands, it releases the connection between the sliding ring and the fixed ring, driving the sliding ring to slide. When the sliding ring slides, the sliding distance of the sliding ring is limited by the cooperation between the inner wall of the gourd-shaped borehole and the limiting component, so that the first expansion capsule and the second expansion capsule seal the gourd-shaped borehole in sections, increasing the sealing area of ​​the borehole.

[0009] Preferably, the connecting assembly includes at least two rotating plates, each rotatably connected to a sliding ring. A connecting plate is fixedly connected to each rotating plate, and a connecting spring is provided between each rotating plate and the sliding ring. One end of the connecting plate is located outside the first expansion capsule. A locking post is fixedly connected to the rotating plate near the fixed ring, and the locking post is engaged with the fixed ring. A guide post is fixedly connected to the sliding ring near the fixed ring, and the guide post is slidably connected to the fixed ring. A compression spring is sleeved on the outer surface of the guide post, and both ends of the compression spring are fixedly connected to the sliding ring and the fixed ring, respectively. When the first expansion capsule expands, it pushes the connecting plate and the rotating plate to rotate in the direction of expansion of the first expansion capsule, thereby causing the locking post to release from engagement with the fixed ring. When the locking post releases engagement, the sliding ring is driven to slide away from the fixed ring under the cooperation of the guide post and the compression spring.

[0010] Preferably, the connecting piece is configured as an arc shape, and the connecting piece is attached to the outer surface of the expanded first expansion capsule.

[0011] Preferably, the locking pin is arc-shaped, and the rotation center of the locking pin is the same as the rotation center of the rotating plate shaft end.

[0012] Preferably, the connecting pipe is a flexible pipe.

[0013] Preferably, the limiting component includes at least one positioning post, which is slidably connected to the outer surface of the sliding ring. A rotating rod is rotatably connected to the end of the sliding ring away from the first expansion capsule. A limiting rod is fixedly connected to the side of the rotating rod near the sliding ring. The limiting rod is slidably connected to the sliding ring and passes through the sliding ring to engage with the positioning post. A guide block is fixedly connected to the outer surface of the grouting component. The guide block and the rotating rod are located on the same straight line. When the sliding ring slides, the guide block pushes the bottom of the rotating rod, driving the rotating rod to rotate and causing the limiting rod to disengage from the positioning post.

[0014] Preferably, the limiting rod is configured as an arc shape, and the rotation center of the limiting rod is the same as the rotation center of the rotating rod.

[0015] Preferably, the rotating rod is configured with an inclined surface on the side near the guide block.

[0016] Preferably, the sliding ring has a groove that is slidably connected to the guide block.

[0017] Preferably, the top of the positioning post is set to be semi-circular.

[0018] Compared with the prior art, the present invention provides a grouting and sealing device for fault water hazard prevention, which has the following beneficial effects:

[0019] 1. This invention, through the design of a sealing mechanism, addresses gourd-shaped boreholes by segmenting a first expansion capsule and a second expansion capsule. When the external air supply end inflates the first expansion capsule, the connecting and limiting components work together to position the first and second expansion capsules in the larger and smaller diameter areas of the gourd shape. This allows the first and second expansion capsules to expand to appropriate sizes after expansion, aligning with different areas during sealing. This avoids poor contact with the gourd-shaped borehole wall during sealing, increases the sealing contact area with the borehole wall, and ensures a good sealing effect during grouting and plugging.

[0020] 2. By setting up a limiting component, when the sliding ring slides outward, the rotating rod, limiting rod, guide block, and connecting spring work together to allow the positioning post to slide outward and unfold. During the sliding process of the sliding ring, the protruding positioning post contacts the gourd-shaped side wall, thereby limiting the sliding distance of the sliding ring. This ensures that the sliding ring and the second expansion capsule are better positioned in the area with the larger diameter of the gourd-shaped borehole, guaranteeing the fit between the second expansion capsule and the area with the larger diameter of the gourd-shaped borehole, thus improving the sealing effect. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a partial three-dimensional structural diagram of the present invention;

[0023] Figure 3 This is a partial cross-sectional view of the present invention;

[0024] Figure 4 This is a three-dimensional structural diagram of the positioning post of the present invention;

[0025] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle;

[0026] Figure 6 This is a structural diagram of the sealing mechanism of the present invention in use.

[0027] In the picture:

[0028] 100. Grouting component body; 101. Material conveying pipe;

[0029] 200. Sealing mechanism; 201. Fixing ring; 202. First expansion capsule; 203. Sliding ring; 204. Second expansion capsule; 205. Connecting pipe;

[0030] 211. Rotating plate; 212. Connecting plate; 213. Locking post; 214. Guide post; 215. Compression spring;

[0031] 221. Positioning pin; 222. Rotating rod; 223. Limiting rod; 224. Guide block. Detailed Implementation

[0032] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, some features described in the examples may be combined in other examples.

[0033] like Figures 1 to 6 As shown, this embodiment provides a grouting and sealing device for fault water hazard prevention, including a grouting component body 100, a material conveying pipe 101 fixedly installed on the inner surface of the grouting component body 100, and at least two sealing mechanisms 200 provided on the grouting component body 100.

[0034] Each sealing mechanism 200 includes at least one fixing ring 201, which is fixedly connected to the outer surface of the grouting component body 100. A first expansion capsule 202 is fixedly connected to the outer surface of the fixing ring 201. At least one sliding ring 203 is slidably connected to the outer surface of the grouting component body 100. A second expansion capsule 204 is fixedly connected to the outer surface of the sliding ring 203. The second expansion capsule 204 is connected to the first expansion capsule 202 through a connecting pipe 205.

[0035] The sealing mechanism 200 includes a connecting component and a limiting component. The connecting component is used to connect the sliding ring 203 and the fixed ring 201. When the first expansion capsule 202 expands, it releases the connection between the sliding ring 203 and the fixed ring 201, driving the sliding ring 203 to slide. When the sliding ring 203 slides, the sliding distance of the sliding ring 203 is limited by the cooperation between the inner wall of the gourd-shaped borehole and the limiting component, so that the first expansion capsule 202 and the second expansion capsule 204 seal the gourd-shaped borehole in sections, increasing the sealing area of ​​the borehole.

[0036] The first expansion capsule 202 and the second expansion capsule 204 are both annular expansion bladders in the prior art, and the connection method between the first expansion capsule 202 and the external gas supply pipe is also the connection method in the prior art.

[0037] The connecting assembly includes at least two rotating pieces 211, each rotatably connected to a sliding ring 203. A connecting piece 212 is fixedly connected to each rotating piece 211. A connecting spring is provided between each rotating piece 211 and the sliding ring 203. One end of the connecting piece 212 is located outside the first expansion capsule 202. A locking post 213 is fixedly connected to the side of the rotating piece 211 near the fixed ring 201, and the locking post 213 engages with the fixed ring 201. A guide post 214 is fixedly connected to the side of the sliding ring 203 near the fixed ring 201, and the guide post 214 engages with... The fixed ring 201 is slidably connected, and the outer surface of the guide post 214 is fitted with a compression spring 215. The two ends of the compression spring 215 are fixedly connected to the sliding ring 203 and the fixed ring 201, respectively. When the first expansion capsule 202 expands, it pushes the connecting piece 212 and the rotating piece 211 to rotate in the direction of expansion of the first expansion capsule 202, thereby causing the locking post 213 to release from the locking of the fixed ring 201. When the locking post 213 is released from the locking, under the cooperation of the guide post 214 and the compression spring 215, it drives the sliding ring 203 to slide away from the fixed ring 201.

[0038] Furthermore, the connecting piece 212 is set to be arc-shaped, and the connecting piece 212 is attached to the outer surface of the expanded first expansion capsule 202, so that when the first expansion capsule 202 expands, there will be no large stress acting on the first expansion capsule 202.

[0039] Furthermore, the locking post 213 is designed to be arc-shaped, and the rotation center of the locking post 213 is the same as the rotation center of the shaft end of the rotating plate 211. This allows the locking post 213 to follow the same trajectory as the locking groove of the fixing ring 201 when the rotating plate 211 rotates, thereby reducing the thrust required for disengagement.

[0040] Furthermore, the connecting pipe 205 is configured as a flexible pipe, so that when the sliding ring 203 slides, one end of the flexible pipe can slide along with it.

[0041] The limiting component includes at least one positioning post 221, which is slidably connected to the outer surface of the sliding ring 203. A rotating rod 222 is rotatably connected to the end of the sliding ring 203 away from the first expansion capsule 202. A limiting rod 223 is fixedly connected to the side of the rotating rod 222 near the sliding ring 203. The limiting rod 223 is slidably connected to the sliding ring 203 and passes through the sliding ring 203 and is engaged with the positioning post 221. A guide block 224 is fixedly connected to the outer surface of the grouting component body 100. The guide block 224 and the rotating rod 222 are located on the same straight line. When the sliding ring 203 slides, the guide block 224 pushes the bottom of the rotating rod 222, driving the rotating rod 222 to rotate and causing the limiting rod 223 to disengage from the positioning post 221.

[0042] Furthermore, the limiting rod 223 is set in an arc shape, and the rotation center of the limiting rod 223 is the same as the rotation center of the rotating rod 222, so that when the rotating rod 222 rotates, the limiting rod 223 can be better disengaged from the positioning post 221.

[0043] Furthermore, the rotating rod 222 is set with an inclined surface on the side near the guide block 224 to reduce the stress when it comes into contact with the guide block 224.

[0044] Furthermore, the sliding ring 203 has a groove that is slidably connected to the guide block 224. One side of the guide block 224 is rectangular and the same size as the groove. The purpose is to divide and seal the groove to prevent it from affecting the sealing effect when the grouting component body 100 is sealed. It also limits the sliding distance of the sliding ring 203.

[0045] Furthermore, the top of the positioning post 221 is set to be semi-circular to reduce the stress when in contact with the inner wall of the borehole and to better fit the gourd-shaped inner wall.

[0046] The working principle of all the content in the above embodiments is as follows:

[0047] In the initial state, the first expansion capsule 202 and the second expansion capsule 204 are in an unexpanded state. The connecting piece 212 is in contact with the outer surface of the first expansion capsule 202, and the locking post 213 is engaged with the fixing ring 201. The compression spring 215 is in a compressed state. At the same time, most of the positioning post 221 is located inside the sliding ring 203, and the connecting spring between the positioning post 221 and the sliding ring 203 is in a compressed state. The limiting rod 223 passes through the sliding ring 203 and is engaged with the positioning post 221. The first expansion capsule 202 is connected to the external gas supply end.

[0048] The following describes the working principle and beneficial effects of the sealing mechanism 200:

[0049] When sealing the area of ​​the sealing mechanism 200, a gourd-shaped terrain appears during the sealing process. The grouting component body 100 is inserted into the borehole, so that the first expansion capsule 202 is located in the middle of the gourd-shaped terrain in the borehole, that is, in the position with a smaller radius of the gourd-shaped terrain. Then, the external air supply end inflates the first expansion capsule 202, causing the first expansion capsule 202 to expand. The expanded first expansion capsule 202 fits into the borehole with a smaller radius. During the expansion of the first expansion capsule 202, it pushes the connecting piece 212 and the rotating piece 211 to rotate, causing the rotating piece 211 to rotate away from the fixed ring 201. This causes the locking post 213 to disengage from the fixed ring 201, releasing the limiting effect on the rotating piece 211. At this time, under the action of the rebound force of the compression spring 215, the sliding ring 203 slides away from the fixed ring 201 under the guidance of the guide post 214.

[0050] Furthermore, during the sliding of the sliding ring 203, the bottom of the rotating rod 222 will move closer to the guide block 224. Under the blocking action of the guide block 224, the end of the rotating rod 222 near the guide block 224 rotates towards the sliding ring 203, thereby causing the other end of the rotating rod 222 to rotate away from the sliding ring 203. This causes the rotating rod 222 to drive the limiting rod 223 to rotate away from the positioning post 221, disengaging the limiting rod 223 from the positioning post 221. At this time, under the rebound force of the connecting spring, the positioning post 221 rises. Then, during the sliding of the sliding ring 203 away from the fixed ring 201, under the action of the connecting spring, the positioning post 221 slides outward from the sliding ring 203. Due to the characteristics of the gourd-shaped terrain, such as... Figure 6 As shown, when the outwardly protruding positioning post 221 contacts the inner wall of the gourd-shaped borehole area with a larger diameter, the positioning post 221 is blocked by the inner wall, thus preventing the sliding ring 203 from continuing to slide. Consequently, the second expansion capsule 204 is located in the gourd-shaped area with a larger diameter. After the first expansion capsule 202 and the second expansion capsule 204 are inflated, they actually seal and contact the gourd-shaped area in sections.

[0051] Furthermore, through the sealing mechanism 200, when encountering a gourd-shaped borehole, the segmented arrangement of the first expansion capsule 202 and the second expansion capsule 204 allows the external air supply end to inflate the first expansion capsule 202. With the cooperation of the connecting component and the limiting component, the first expansion capsule 202 and the second expansion capsule 204 are positioned in the larger diameter area and the smaller diameter area of ​​the gourd shape, respectively. Thus, after the first expansion capsule 202 and the second expansion capsule 204 expand, they can respectively cooperate with different areas and expand to an appropriate size, avoiding the problem of poor contact with the gourd-shaped borehole wall during sealing, increasing the sealing contact area with the borehole wall, and ensuring the sealing effect during grouting and sealing.

[0052] Furthermore, by fitting the arc-shaped surface of the connecting piece 212 to the first expansion capsule 202, the first expansion capsule 202 will not experience significant stress when it expands, thus providing a protective effect.

[0053] Furthermore, by setting the locking post 213 in an arc shape, and with the rotation center of the locking post 213 being the same as the rotation center of the rotating plate 211, the trajectory of the locking post 213 disengaging from the locking groove of the fixing ring 201 is the same when the rotating plate 211 rotates, thereby reducing the thrust required for disengagement, reducing the load when the first expansion capsule 202 is pushed, and avoiding greater resistance when the first expansion capsule 202 expands.

[0054] Furthermore, by setting the limiting rod 223 in an arc shape and setting the rotation center of the limiting rod 223 to be the same as the rotation center of the rotating rod 222, the limiting rod 223 can be better disengaged from the positioning post 221 when the rotating rod 222 rotates, for the same reason as above.

[0055] Furthermore, when the rotating rod 222 contacts the guide block 224, the inclined surface of the guide block 224 pushes the bottom inclined surface of the rotating rod 222, thereby reducing the stress when they contact, reducing wear, and making the pushing smoother. At the same time, after the rotating rod 222 rotates at an appropriate angle, when the limiting rod 223 disengages from the positioning post 221, the bottom of the rotating rod 222 is misaligned with the guide block 224. At this time, the sliding ring 203 continues to slide, and the guide block 224 will enter the groove opened by the sliding ring 203. When the sliding ring 203 stops sliding, the guide block 224 is located inside the groove. One side of the guide block 224 is set as a rectangle, with the same size as the groove. The purpose is to divide and seal the groove to prevent affecting the sealing effect when the grouting component body 100 is sealed, and also to limit the sliding distance of the sliding ring 203.

[0056] By setting the limiting component, when the sliding ring 203 slides outward, the positioning post 221 slides outward and unfolds under the cooperation of the rotating rod 222, the limiting rod 223, the guide block 224 and the connecting spring. During the sliding process of the sliding ring 203, the protruding positioning post 221 contacts the gourd-shaped side wall, thereby limiting the sliding distance of the sliding ring 203. This allows the sliding ring 203 and the second expansion capsule 204 to be better positioned in the area with the larger diameter of the gourd-shaped drill hole, ensuring the fit between the second expansion capsule 204 and the area with the larger diameter of the gourd-shaped drill hole, thereby improving the sealing effect.

[0057] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.

Claims

1. A grouting and sealing device for fault-based water hazard prevention, comprising a grouting component body (100), wherein a material conveying pipe (101) is fixedly installed on the inner surface of the grouting component body (100), characterized in that, The grouting component body (100) is provided with at least two sealing mechanisms (200). Each of the sealing mechanisms (200) includes at least one fixing ring (201), which is fixedly connected to the outer surface of the grouting component body (100). A first expansion capsule (202) is fixedly connected to the outer surface of the fixing ring (201), and at least one sliding ring (203) is slidably connected to the outer surface of the grouting component body (100). A second expansion capsule (204) is fixedly connected to the outer surface of the sliding ring (203), and the second expansion capsule (204) is connected to the first expansion capsule (202) through a connecting pipe (205). The sealing mechanism (200) includes a connecting component and a limiting component. The connecting component is used to connect the sliding ring (203) and the fixed ring (201). When the first expansion capsule (202) expands, it releases the connection between the sliding ring (203) and the fixed ring (201) and drives the sliding ring (203) to slide. When the sliding ring (203) slides, the sliding distance of the sliding ring (203) is limited by the cooperation between the inner wall of the gourd-shaped borehole and the limiting component, so that the first expansion capsule (202) and the second expansion capsule (204) seal the gourd-shaped borehole in sections, thereby increasing the sealing area of ​​the borehole.

2. The grouting and sealing device for fault water hazard prevention according to claim 1, characterized in that: The connecting assembly includes at least two rotating pieces (211), each of which is rotatably connected to a sliding ring (203). A connecting piece (212) is fixedly connected to each rotating piece (211). A connecting spring is provided between each rotating piece (211) and the sliding ring (203). One end of the connecting piece (212) is located outside the first expansion capsule (202). A locking post (213) is fixedly connected to the side of the rotating piece (211) near the fixed ring (201). The locking post (213) engages with the fixed ring (201). A guide post (214) is fixedly connected to the side of the sliding ring (203) near the fixed ring (201). (214) is slidably connected to the fixed ring (201). A compression spring (215) is sleeved on the outer surface of the guide post (214). The two ends of the compression spring (215) are fixedly connected to the sliding ring (203) and the fixed ring (201) respectively. When the first expansion capsule (202) expands, it pushes the connecting piece (212) and the rotating piece (211) to rotate in the direction of expansion of the first expansion capsule (202), thereby causing the locking post (213) to release from the locking ring (201). When the locking post (213) is released from the locking ring, under the cooperation of the guide post (214) and the compression spring (215), it drives the sliding ring (203) to slide away from the fixed ring (201).

3. The grouting and sealing device for fault water hazard prevention according to claim 2, characterized in that: The connecting piece (212) is set in an arc shape and is attached to the outer surface of the expanded first expansion capsule (202).

4. A grouting and sealing device for fault water hazard prevention according to claim 2, characterized in that: The locking post (213) is set in an arc shape, and the rotation center of the locking post (213) is the same as the rotation center of the shaft end of the rotating piece (211).

5. A grouting and sealing device for fault water hazard prevention according to claim 1, characterized in that: The connecting pipe (205) is configured as a flexible pipe.

6. A grouting and sealing device for fault water hazard prevention according to claim 1, characterized in that: The limiting component includes at least one positioning post (221), which is slidably connected to the outer surface of the sliding ring (203). A rotating rod (222) is rotatably connected to the end of the sliding ring (203) away from the first expansion capsule (202). A limiting rod (223) is fixedly connected to the side of the rotating rod (222) near the sliding ring (203). The limiting rod (223) is slidably connected to the sliding ring (203) and passes through it. The sliding ring (203) is engaged with the positioning post (221). A guide block (224) is fixedly connected to the outer surface of the grouting component body (100). The guide block (224) and the rotating rod (222) are located on the same straight line. When the sliding ring (203) slides, the guide block (224) pushes the bottom of the rotating rod (222), driving the rotating rod (222) to rotate and causing the limiting rod (223) to disengage from the positioning post (221).

7. A grouting and sealing device for fault water hazard prevention according to claim 6, characterized in that: The limiting rod (223) is set in an arc shape, and the rotation center of the limiting rod (223) is the same as the rotation center of the rotating rod (222).

8. A grouting and sealing device for fault water hazard prevention according to claim 6, characterized in that: The rotating rod (222) is set as an inclined surface on the side near the guide block (224).

9. A grouting and sealing device for fault water hazard prevention according to claim 6, characterized in that: The sliding ring (203) has a sliding groove, which is slidably connected to the guide block (224).

10. A grouting and sealing device for fault water hazard prevention according to claim 6, characterized in that: The top of the positioning post (221) is set as a semi-circle.

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