Strong-pressure-bearing water stop device in limestone aquifer grouting transformation drill hole

Abstract

The invention relates to the technical field of high-pressure-bearing water stopping, and discloses a high-pressure-bearing water stopping device in limestone aquifer grouting transformation drilling, which comprises a grouting pipe, one end of the grouting pipe is connected with grouting equipment, the outer wall of the grouting pipe is provided with a mounting groove, and the outer wall of the grouting pipe is vertically and slidably connected with a movable disc; horizontal grooves are uniformly formed in the top end of the movable disc in the radial direction of the grouting pipe; the grouting device further comprises a water stop piece, and the water stop piece is installed on the outer wall of the grouting pipe and arranged in the installation groove. The first air bag in the supporting mechanism can be adjusted and controlled under the pressurizing mechanism, the water stopping piece is further pulled and supported, and therefore water stopping operation can still be conducted when the water stopping piece faces high-pressure water flow, and under linkage cooperation of the supporting mechanism and the limiting assembly, the water stopping piece can still stop water under high-pressure water flow. According to the grouting device, the fixing cone in the limiting mechanism can be synchronously driven to be inserted into the wall of a grouting hole, and the grouting pipe and the water stop piece are further fixed, so that the pressure bearing capacity of the grouting device is improved, and the grouting requirement is better met.

Description

Technical Field

[0001] The invention relates to the technical field of strong pressure-bearing water-stopping, in particular to a strong pressure-bearing water-stopping device in a grouting transformation borehole of a limestone aquifer. Background Art

[0002] Limestone strata, mainly limestone, are widely distributed in karst areas. This type of rock has undergone long-term sedimentation and changes in geological history, forming many cracks, caves and underground pipeline systems. The reasons for the high water pressure in the limestone aquifers in karst areas mainly include the geological characteristics of limestone, the way of groundwater recharge, the water-richness of the aquifer, the characteristics of the aquifer, and the circulation and discharge of groundwater. These factors work together to enable the limestone aquifer to maintain a relatively high water pressure state.

[0003] In the mining process, the water hazard of limestone aquifers has always been an important safety hazard. Although the traditional grouting transformation method has achieved certain results, the water stopping effect in the borehole is often unsatisfactory under strong pressure, resulting in reduced grouting effect and even safety accidents.

[0004] Therefore, developing a new type of strong pressure-bearing water-stopping device is of great significance for improving the grouting transformation effect and ensuring mine safety. Summary of the invention

[0005] In order to solve the technical problem that the pressure-bearing device proposed in the background technology cannot withstand excessive water pressure when grouting in karst limestone aquifers, thereby reducing the grouting effect and posing a safety hazard, the present invention provides a strong pressure-bearing water-stopping device in the grouting transformation borehole of the limestone aquifer.

[0006] The present invention is implemented by the following technical scheme: a strong pressure-bearing water-stopping device in a limestone aquifer grouting transformation borehole comprises a grouting pipe, one end of which is connected to a grouting device, an outer wall of the grouting pipe is provided with an installation groove, the outer wall of the grouting pipe is vertically slidably connected to a movable disk, and the top of the movable disk is evenly provided with horizontal grooves along the radial direction of the grouting pipe.

[0007] It also includes a water stop member, which is installed on the outer wall of the grouting pipe and is arranged in the installation groove. The water stop member is open, and the opening direction is consistent with the grouting direction of the grouting pipe.

[0008] A support mechanism is arranged in the water stop, and the support mechanism includes a guide cone, and the guide cone is sleeved at the connection between the water stop and the grouting pipe. The inner top of the water stop is fixedly connected to the guide cone, and the bottom end of the guide cone is fixedly connected to a circular ring, and the bottom end of the circular ring is evenly distributed with a plurality of vertical rods along the circumferential direction, and the bottom ends of the plurality of vertical rods are hinged with a bent support rod, and the bending direction of the support rod is opposite to the grouting direction, and the middle section of the support rod is fixedly connected with a round rod, and the plurality of round rods are rotatably connected. It is connected to corresponding vertical plates, and the interior surrounded by multiple vertical plates is movably provided with airbags one. The bottom end of the vertical plate is relatively horizontally slidably connected to the horizontal groove. The airbag is set on the outside of the grouting pipe, and the top of the airbag is fixedly connected to the outer wall of the grouting pipe. The bottom end of the airbag is movably contacted with the outer wall of the grouting pipe. The airbag is also fixedly connected to the top of the movable plate. When the airbag is inflated, multiple support rods are deployed and supported on the water stop. An inflation tube is connected to the outside of the airbag, and a boosting mechanism is connected to the other end of the inflation tube.

[0009] The limiting mechanism is arranged at the bottom end of the movable plate and is used for being fixed relative to the inner wall of the drill hole.

[0010] The recovery component is installed on the outer wall of the grouting pipe and is located below the limiting mechanism, and is used to assist the limiting mechanism in resetting.

[0011] Through the above technical scheme, when the equipment is moved into the mine and grouting operation is required, after the grouting liquid is mixed and proportioned, the booster mechanism is started, and the grouting liquid is transported to the airbag through the inflation tube, thereby synchronously driving the support mechanism to push the water stop part outward to expand and support it. At this time, the water stop part can further fit with the wall of the grouting hole and be closed under the action of the water stop part. Secondly, as the limiting mechanism moves synchronously, it will drive the internal fixed cone part to penetrate the inner wall of the grouting hole, and further stably support the water stop part and the grouting pipe, so that the equipment can improve its pressure resistance and ensure the normal realization of the grouting operation; and after the grouting operation is completed, the limiting mechanism with the assistance of the recovery component can be used for recovery.

[0012] As a further improvement of the above scheme, the limiting mechanism includes a rotating groove, which is coaxially arranged with the grouting pipe, and a rotating block is rotatably connected in the rotating groove, and a plurality of limiting sleeve blocks are evenly and fixedly connected to the inner wall of the movable disk, and the plurality of limiting sleeve blocks are radially distributed along the grouting pipe, and a sliding shaft is slidably connected in the plurality of limiting sleeve blocks.

[0013] As a further improvement of the above scheme, a plurality of slots are formed through the bottom end of the inner wall of the movable disk, and the slots are radially distributed along the movable disk. The number of the slots is consistent with the number of the limiting sleeves, and a sliding rod is slidably connected in each slot, and the sliding rod reciprocates in the corresponding slot. The bottom end of each sliding rod is fixedly connected to a fixed cone, wherein the tail of the fixed cone has a cone tip, and as the sliding rod slides along the slot, the cone tip always faces the inner wall of the borehole, and upper docking plates are fixedly connected on both sides of the fixed cone, and the upper docking plates have an inclined contact surface.

[0014] As a further improvement of the above scheme, the bottom end of the rotating block is evenly provided with arc-shaped notches, and a sliding shaft is slidably connected in the arc-shaped notches. The bottom end of the sliding shaft is movably connected with a telescopic double ring, and the telescopic double ring is provided with two rotating holes, one of which is rotatably connected to the bottom end of the sliding shaft; The top end of each slide rod passes through another rotating hole on the telescopic double ring and is fixedly connected to the limiting protrusion.

[0015] When the airbag expands, the bottom end of the rotating block rotates and pushes the multiple sliding shafts to slide outward along the arc-shaped slots, and drives the multiple sliding rods to slide outward along the slots synchronously, and finally the cone tip of the fixed cone is inserted into the inner wall of the drill hole.

[0016] Through the above technical scheme, the boosting mechanism is used to boost the airbag 1, so that when the airbag 1 expands and moves to the lower end, it will push the movable plate as a whole to move downward along the outer wall of the grouting pipe, and then under the hinge of multiple vertical plates, round rods and support rods, the support rods can be pulled to pull the water stop to expand, and the outer wall of the water stop can be further close to the inner wall of the grouting hole, and when the grouting operation is carried out, when the internal water flow impacts the water stop under high pressure, it will impact the water stop under the guidance of the guide cone, thereby intensifying the internal support rods to further expand outward, so as to better support.

[0017] As a further improvement of the above scheme, a guide groove is provided on the inner wall of the grouting pipe corresponding to the rotating block. The guide groove is spirally arranged. A protrusion is slidably connected in the guide groove. The protrusion is fixedly connected to the inner wall of the rotating block. When the movable disk moves along the axial direction of the grouting pipe, the rotating block rotates due to the sliding connection between the protrusion and the guide groove.

[0018] As a further improvement of the above scheme, the recovery component includes an airbag 2 which is sleeved on the outer wall of the grouting pipe, wherein the bottom end of the airbag 2 is fixedly connected to the outer wall of the grouting pipe, the top end of the airbag 2 is in movably contact with the outer wall of the grouting pipe, the outer wall of the airbag 2 is connected with an inflation tube 2, the inflation tube 2 is connected to the boosting mechanism, the airbag 2 is arranged below the movable disk, and an extrusion unit is installed on the top end of the airbag 2. The extrusion unit can contact the fixed cone after the airbag 2 expands and lifts upward to push the fixed cone to separate from the inner wall of the borehole.

[0019] As a further improvement of the above solution, the extrusion unit includes a disc fixedly connected to the top of the second airbag, and a plurality of groups of extrusion modules distributed on the top surface of the disc, and the number of the extrusion modules is the same as the number of fixed cones.

[0020] As a further improvement of the above scheme, the extrusion module includes a lower docking plate, which is fixed on the disc and has an inclined contact surface 2, and the contact surface 1 on the upper docking plate is parallel to the contact surface 2 on the lower docking plate.

[0021] When the disc rises, the contact surface 1 on the upper docking plate and the contact surface 2 on the lower docking plate come into contact with each other to push the corresponding fixed cone to reset.

[0022] Through the above technical solution, the airbag 2 under the pressure of the boosting mechanism can push the disc to move vertically to the upper end, and can push the upper docking plate to assist in returning to its original position under the sliding contact between the lower docking plate and the upper docking plate.

[0023] Compared with the prior art, the present invention has the following beneficial effects: (a) The present invention utilizes an air bag inside the supporting mechanism to be adjusted and controlled under the boosting mechanism, further pulling and supporting the water stop, so that water stopping operations can still be performed when facing high-pressure water flow, and under the linkage cooperation of the supporting mechanism and the limiting assembly, the fixed cone in the limiting mechanism can be synchronously driven to be inserted into the grouting hole wall, and the grouting pipe and the water stop can be further fixed to improve the pressure bearing capacity of the equipment and better meet the grouting needs.

[0024] (ii) The present invention utilizes a recovery component to push and recover the fixed cone that is fixed into the wall of the grouting hole, thereby avoiding the situation where the airbag 1 alone cannot complete the shrinkage recovery due to over-tightening. The equipment can also be further protected to avoid damage to the airbag 1 due to excessive pressure, thereby ensuring the normal operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the overall structure of a strong pressure-bearing water-stopping device in a limestone aquifer grouting transformation borehole provided in Example 1 of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of a front cross-sectional structure; Figure 3 It is a structural schematic diagram of the internal connection state of the water stop member of the present invention; Figure 4 It is a structural schematic diagram of the connection state of the limiting mechanism of the present invention; Figure 5 It is a schematic diagram of the exploded cross-section structure of the limiting mechanism of the present invention; Figure 6For the present invention Figure 3 A schematic diagram of the structure enlarged at a in the middle; Figure 7 For the present invention Figure 4 The enlarged schematic diagram of the structure at b in the middle; Figure 8 It is a schematic diagram of the explosion structure of the limiting mechanism of the present invention; Fig. 9 It is a schematic diagram of the connection state of the rotating components in the limiting mechanism of the present invention.

[0026] Description of reference numerals: 1. Grouting pipe; 2. Water stop; 3. Guide cone; 4. Vertical rod; 5. Support rod; 6. Round rod; 7. Vertical plate; 8. Moving plate; 9. Horizontal groove; 10. Air bag one; 11. Inflatable tube one; 12. Notch; 13. Slide rod; 14. Fixed cone; 15. Rotating groove; 16. Rotating block; 17. Upper docking plate; 18. Limiting sleeve block; 19. Sliding shaft; 20. Telescopic double ring; 21. Limiting protrusion; 22. Air bag two; 23. Lower docking plate; 24. Inflatable tube two; 25. Guide groove; 26. Protrusion; 27. Arc notch. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0028] Example 1

[0029] Please combine Figure 1-Figure 9 The strong pressure-bearing water-stopping device in the limestone aquifer grouting transformation borehole of this embodiment includes a grouting pipe 1, one end of the grouting pipe 1 is connected to a grouting device, an outer wall of the grouting pipe 1 is provided with a mounting groove, the outer wall of the grouting pipe is vertically slidably connected with a movable plate 8, and the top of the movable plate 8 is evenly provided with horizontal grooves 9 along the radial direction of the grouting pipe 1.

[0030] See also Figure 2 and Figure 3 , including a water stop 2, the water stop 2 is installed on the outer wall of the grouting pipe 1, and the water stop 2 is arranged in the installation groove, the water stop 2 is open, and the opening direction is consistent with the grouting direction of the grouting pipe 1.

[0031] See also Figure 2 , Figure 3 and Figure 6, and also includes a supporting mechanism, which is arranged in the water stop 2, and the supporting mechanism includes a guide cone 3, which is sleeved at the connection between the water stop 2 and the grouting pipe 1, and the inner top of the water stop 2 is fixedly connected to the guide cone 3, and the bottom end of the guide cone 3 is fixedly connected to a ring, and the bottom end of the ring is evenly distributed with a plurality of vertical rods 4 along the circumferential direction, and the bottom ends of the plurality of vertical rods 4 are hinged with a bent support rod 5, which can be referred to Figure 6 The other ends of the multiple support rods 5 are connected to the top of the inner wall of the outer side of the water stop 2, and the middle sections of the support rods 5 are fixedly connected with round rods 6, and the multiple round rods 6 are rotatably connected with corresponding vertical plates 7. The interior surrounded by the multiple vertical plates 7 is movably provided with air bags 10, and the bottom ends of the vertical plates 7 are relatively horizontally slidably connected with the horizontal grooves 9. The air bags 10 are sleeved on the outside of the grouting pipe 1, and the top of the air bags 10 is fixedly connected to the outer wall of the grouting pipe 1, and the bottom end of the air bags 10 is in active contact with the outer wall of the grouting pipe 1. The air bags 10 are also fixedly connected to the top of the movable plate 8. When the air bags 10 are inflated, the multiple support rods 5 are expanded and supported on the water stop 2. Please refer to Figure 3 The outside of the airbag 10 is connected to an inflation tube 11, and the other end of the inflation tube 11 is connected to a pressurizing mechanism, specifically, the pressurizing mechanism is an air pump.

[0032] See also Figure 2 , Figure 4 , Figure 5 , Figure 7 , Figure 8 and Fig. 9 , and also includes a limiting mechanism, which is arranged at the bottom of the moving plate 8 and is used to be fixed relatively to the inner wall of the borehole. The limiting mechanism includes a rotating groove 15, which is coaxially arranged with the grouting pipe 1, and a rotating block 16 is rotatably connected in the rotating groove 15, and a plurality of limiting sleeves 18 are evenly and fixedly connected to the inner wall of the moving plate 8, and the plurality of limiting sleeves 18 are distributed along the radial direction of the grouting pipe 1, and a sliding shaft 19 is slidably connected in the plurality of limiting sleeves 18. A plurality of slots 12 are provided through the bottom end of the inner wall of the movable disk 8, and the slots 12 are radially distributed along the movable disk 8. The number of the slots 12 is consistent with the number of the limiting sleeves 18, and a limiting groove is provided in the limiting sleeves 18. Specifically, the limiting groove and the adjacent slots 12 are radially arranged along the movable disk 8, and each slot 12 is slidably connected with a slide bar 13, and the slide bar 13 reciprocates in the corresponding slot 12, and the bottom end of each slide bar 13 is fixedly connected with a fixed cone 14, wherein the tail of the fixed cone 14 has a cone tip, and as the slide bar 13 slides along the slot 12, the cone tip always faces the inner wall of the borehole, and upper docking plates 17 are fixedly connected on both sides of the fixed cone 14, and the upper docking plates 17 have an inclined contact surface 1. The bottom of the rotating block 16 is uniformly provided with arc-shaped slots 27, and the sliding shaft 19 is slidably connected in the arc-shaped slots 27. The bottom of the sliding shaft 19 is movably connected with a telescopic double ring 20, and the telescopic double ring 20 is provided with two rotating holes, one of which is rotatably connected to the bottom of the sliding shaft 19. Figure 8and Fig. 9 . The top of each slide bar 13 passes through another rotating hole on the telescopic double ring 20 and is fixedly connected to the limiting protrusion 21. Wherein: when the airbag 10 is expanded, under the rotation and push of the bottom end of the rotating block 16, multiple sliding shafts 19 slide outward along the arc-shaped notch 27, and multiple telescopic double rings 20 are used to pull the rotationally connected slide bar 13, so that the slide bar 13 slides outward synchronously along the notch 12, and finally the cone tip of the fixed cone 14 is inserted into the inner wall of the borehole. In the above-mentioned motion transmission, the telescopic double ring 20 will slide synchronously with the sliding of the sliding shaft 19, and when the sliding shaft 19 slides outward along the limiting groove in the limiting sleeve, the two ends of the telescopic double ring 20 are respectively rotatably connected to the bottom end of the sliding shaft 19 and the top end of the slide bar 13, so that the slide bar 13 can be pulled outward by the telescopic double ring 20 through the sliding shaft 19. Among them, since the limiting groove and the notch 12 in the limiting sleeve 18 are both arranged along the radial direction of the movable disk 8, The two are in a non-parallel state, so as the sliding shaft 19 slides outward along the limiting groove in the limiting sleeve 18, the relative horizontal displacement distance between the sliding rod 13 and the sliding shaft 19 will increase. At this time, the telescopic double ring 20 will perform a relative horizontal tensile displacement. More specifically, the telescopic double ring 20 is composed of an outer ring and an inner ring slidingly connected, and the outer ring and the inner ring are respectively provided with rotating holes, and the two rotating holes are respectively rotatably connected to the sliding shaft 19 and the top of the sliding rod 13, and the outer ring and the inner ring can slide horizontally relative to each other. A connecting groove is provided in the middle part of the inner side of the outer ring, and a connecting protrusion is fixedly connected to the inner side of the inner ring. The connecting protrusion and the connecting groove are relatively slidably connected, so that the sliding rod 13 and the sliding shaft 19 can slide outward or inward under the adaptive connection of the telescopic double ring 20 without interference. A guide groove 25 is provided on the inner wall of the grouting pipe 1 corresponding to the rotating block 16. The guide groove 25 is spirally arranged. A protrusion 26 is slidably connected in the guide groove 25. The protrusion 26 is fixedly connected to the inner wall of the rotating block 16. When the movable plate 8 moves axially along the grouting pipe 1, the rotating block 16 rotates due to the sliding connection between the protrusion 26 and the guide groove 25.

[0033] See also Figure 2-Figure 4 , and also includes a recovery component, which is installed on the outer wall of the grouting pipe 1 and is located below the limiting mechanism, and is used to assist the limiting mechanism in resetting.

[0034] The implementation principle of the strong pressure-bearing water-stopping device in the limestone aquifer grouting transformation borehole in the embodiment of the present application is: After the equipment is installed, the grouting pipe 1 is inserted into the hole to be grouted, and then the boosting mechanism is started, and the air bag 10 is pressurized by the inflation tube 11 to expand and contract toward the lower end, and then the movable plate 8 that slides vertically on the outer wall of the grouting pipe 1 is pushed by the air bag 10 to slide the movable plate 8 downward, and under the sliding of multiple vertical plates 7 and horizontal grooves 9, the corresponding support rod 5 is pulled to the lower end to unfold and rotate, and because the support rod 5 is bent, the inner wall of the water stop 2 can be synchronously pulled outward to unfold during rotation, so that it can fit tightly against the wall of the grouting hole to achieve closure.

[0035] At the same time, as the movable plate 8 moves vertically to the lower end, the movable plate 8 and the internal components will be pushed to move downward synchronously, so that the protrusion 26 can realize the vertical displacement of the rotating block 16 under the sliding guidance of the guide groove 25 and can also rotate along the guide groove 25. Relying on the sliding connection between the arc-shaped notch 27 and the corresponding sliding shaft 19, the rotating block 16 drives the multiple sliding shafts 19 at the bottom to slide relatively horizontally outward along the limit sleeve 18. As the sliding shaft 19 slides outward, the sliding rod 13 will be pulled to slide outward along the notch 12 under the connection of the telescopic double ring 20, and finally multiple groups of fixed cones 14 will be inserted into the wall of the grouting hole and fixed, so as to provide further support for the water-stopping component 2.

[0036] Example 2

[0037] Combination Figure 2 , Figure 4 and Figure 5 Based on Example 1 and Example 2, this embodiment is further improved in that: See also Figure 2 and Figure 5 The recovery component includes an airbag 22 sleeved on the outer wall of the grouting pipe 1, wherein the bottom end of the airbag 22 is fixedly connected to the outer wall of the grouting pipe 1, the top end of the airbag 22 is in active contact with the outer wall of the grouting pipe 1, the outer wall of the airbag 22 is connected to an inflatable tube 24, the inflatable tube 24 is connected to the booster mechanism, the airbag 22 is arranged below the movable plate 8, and the top end of the airbag 22 is equipped with an extrusion unit, which can contact the upper docking plate 17 after the airbag 22 expands and rises upward, so as to push the upper docking plate 17 to separate the fixed cone 14 from the inner wall of the borehole. The extrusion unit includes a disc fixedly connected to the top end of the airbag 22, and a plurality of extrusion modules distributed on the top surface of the disc, and the number of the extrusion modules is the same as the number of the fixed cone 14. The extrusion module includes a lower docking plate 23 , which is fixed on the disc and has an inclined contact surface 2. The contact surface 1 on the upper docking plate 17 is parallel to the contact surface 2 on the lower docking plate 23 .

[0038] See also Figure 4, wherein: when the disc rises, the contact surface 1 on the upper docking plate 17 and the contact surface 2 on the lower docking plate 23 collide with each other to push the corresponding fixed cone 14 to reset. Specifically, the contact surface 1 and the contact surface 2 are both smoothly polished to improve the ability of the two to better push the fixed cone 14 to reset when in contact.

[0039] The implementation principle of the strong pressure-bearing water-stopping device in the limestone aquifer grouting transformation borehole in the embodiment of the present application is: After the grouting operation is completed, the boosting mechanism is first started to shrink the airbag 10. If the fixed cone 14 can be directly recovered, the recovery is completed. If the recovery action cannot be completed directly, it is necessary to start the boosting mechanism to boost the airbag 2 22, so that the boosting mechanism drives the airbag 2 22 to move vertically upward, and the lower docking plate 23 pushes the upper docking plate 17 to slide inward, thereby assisting the recovery action.

[0040] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. Strong pressure-bearing water-stopping device in the grouting transformation borehole of limestone aquifer, including: A grouting pipe, one end of which is connected to a grouting device, an outer wall of which is provided with a mounting groove, a movable plate is vertically slidably connected to the outer wall of the grouting pipe, and a top of the movable plate is evenly provided with horizontal grooves along the radial direction of the grouting pipe; It is characterized by further comprising: A water stop, which is installed on the outer wall of the grouting pipe and is arranged in the installation groove. The water stop is open, and the opening direction is consistent with the grouting direction of the grouting pipe; A support mechanism, wherein the support mechanism is arranged in the water stop, and the support mechanism includes a guide cone, wherein the guide cone is sleeved at the connection between the water stop and the grouting pipe, the inner top of the water stop is fixedly connected to the guide cone, and the bottom end of the guide cone is fixedly connected to a circular ring, the bottom end of the circular ring is evenly distributed with a plurality of vertical rods along the circumferential direction, and the bottom ends of the plurality of vertical rods are hinged with a bent support rod, the bending direction of the support rod is opposite to the grouting direction, the other ends of the plurality of support rods are connected to the inner wall of the outer end of the water stop, and the middle section of the support rod is fixedly connected with a circular rod , a plurality of round rods are rotatably connected to corresponding vertical plates, an airbag is movably arranged inside the enclosed interior of the plurality of vertical plates, the bottom end of the vertical plate is relatively horizontally slidably connected to the horizontal groove, a set of the airbag is arranged on the outside of the grouting pipe, and the top end of the airbag is fixedly connected to the outer wall of the grouting pipe, the bottom end of the airbag is movably in contact with the outer wall of the grouting pipe, the airbag is also fixedly connected to the top of the movable plate, the airbag is inflated, so that the plurality of support rods are unfolded and supported on the water stop, the outside of the airbag is connected to an inflation tube, and the other end of the inflation tube is connected to a pressurizing mechanism; A limiting mechanism, which is arranged at the bottom end of the movable plate and is used to be fixed relative to the inner wall of the drill hole; The recovery component is installed on the outer wall of the grouting pipe and is located below the limiting mechanism, and is used to assist the limiting mechanism in resetting.

2. The strong pressure-bearing water-stopping device in the limestone aquifer grouting transformation borehole according to claim 1 is characterized in that: The limiting mechanism includes a rotating groove, which is coaxially arranged with the grouting pipe, and a rotating block is rotatably connected in the rotating groove, and a plurality of limiting sleeve blocks are evenly and fixedly connected to the inner wall of the movable plate, and the plurality of limiting sleeve blocks are radially distributed along the grouting pipe, and a sliding shaft is slidably connected in the plurality of limiting sleeve blocks.

3. The strong pressure-bearing water-stopping device in the limestone aquifer grouting transformation borehole according to claim 2 is characterized in that: A plurality of slots are formed through the bottom end of the inner wall of the movable disk, and the slots are radially distributed along the movable disk. The number of the slots is consistent with the number of the limiting sleeves, and a sliding rod is slidably connected in each slot. The sliding rod reciprocates in the corresponding slot, and a fixed cone is fixedly connected to the bottom end of each sliding rod, wherein the tail of the fixed cone has a cone tip, and as the sliding rod slides along the slot, the cone tip always faces the inner wall of the borehole, and upper docking plates are fixedly connected on both sides of the fixed cone, and the upper docking plates have an inclined contact surface.

4. The strong pressure-bearing water-stopping device in the limestone aquifer grouting transformation borehole as claimed in claim 3 is characterized in that: The bottom end of the rotating block is uniformly provided with arc-shaped notches, and a sliding shaft is slidably connected in the arc-shaped notches. The bottom end of the sliding shaft is movably connected with a telescopic double ring, and the telescopic double ring is provided with two rotating holes, one of which is rotatably connected to the bottom end of the sliding shaft; The top end of each of the sliding rods passes through another rotating hole on the telescopic double ring and is fixedly connected to the limiting protrusion; When the airbag expands, the bottom end of the rotating block rotates and pushes the multiple sliding shafts to slide outward along the arc-shaped slots, and drives the multiple sliding rods to slide outward along the slots synchronously, and finally the cone tip of the fixed cone is inserted into the inner wall of the drill hole.

5. The strong pressure-bearing water-stopping device in the limestone aquifer grouting transformation borehole as claimed in claim 2, characterized in that: A guide groove is provided on the inner wall of the grouting pipe corresponding to the rotating block. The guide groove is spirally arranged. A protrusion is slidably connected in the guide groove. The protrusion is fixedly connected to the inner wall of the rotating block. When the movable disk moves along the axial direction of the grouting pipe, the rotating block rotates due to the sliding connection between the protrusion and the guide groove.

6. The strong pressure-bearing water-stopping device in the limestone aquifer grouting transformation borehole according to claim 1, characterized in that: The recovery component includes an airbag 2 which is sleeved on the outer wall of the grouting pipe, wherein the bottom end of the airbag 2 is fixedly connected to the outer wall of the grouting pipe, the top end of the airbag 2 is in active contact with the outer wall of the grouting pipe, the outer wall of the airbag 2 is connected with an inflation tube 2, the inflation tube 2 is connected to a boosting mechanism, the airbag 2 is arranged below the movable plate, and an extrusion unit is installed on the top end of the airbag 2, and the extrusion unit can contact the upper docking plate after being lifted upward as the airbag 2 expands, so as to push the upper docking plate to separate the fixed cone from the inner wall of the borehole.

7. The strong pressure-bearing water-stopping device in the limestone aquifer grouting transformation borehole as claimed in claim 6, characterized in that: The extrusion unit comprises a disc fixedly connected to the top of the second airbag and a plurality of extrusion modules distributed on the top surface of the disc. The number of the extrusion modules is the same as the number of the fixed cones.

8. The strong pressure-bearing water-stopping device in the limestone aquifer grouting transformation borehole as claimed in claim 7, characterized in that: The extrusion module comprises a lower docking plate, the lower docking plate is fixed on the disc, and the lower docking plate has an inclined contact surface 2, and the contact surface 1 on the upper docking plate is parallel to the contact surface 2 on the lower docking plate; When the disc rises, the first contact surface on the upper docking plate and the second contact surface on the lower docking plate come into contact with each other to push the corresponding fixed cone to reset.

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