Method for using a pipe burst water stopping grouting device

Abstract

The present invention proposes a method for using a pipe burst water stopping grouting device, comprising an outer tube, an inner tube is arranged inside the outer tube; the front end of the inner tube extends outward from the front end of the outer tube, and also comprises a detachable air bag, the air bag is in a cylindrical shape, and the two ends of the air bag are respectively provided with a first butt sleeve and a second butt sleeve, the first butt sleeve is connected to the front end of the outer tube, and the second butt sleeve is connected to the front end of the inner tube so that the inflatable section between the outer tube and the inner tube is connected to the air bag, and the center of the inner tube is provided with a grouting channel arranged through; the rear end of the outer tube is provided with a gas distribution cylinder connected to the inflatable section, the rear end of the gas distribution cylinder is provided with a sliding hole, the inner wall of the sliding hole is provided with a sealing ring, the rear end of the inner tube passes through the sliding hole and the sealing ring to seal and cooperate to ensure air tightness while the inner tube is telescopic, and the gas distribution cylinder is also provided with an air supply port connected to its inner cavity. The present invention has the advantages of accurate positioning, can squeeze the inner wall of the leakage point channel to improve the strength of the leakage pipe position, reduce the water content and thus ensure the reliability of plugging.

Description

Technical Field

[0001] The invention relates to the field of municipal water conservancy emergency rescue, and in particular to a method for using a pipe burst water stopping grouting device. Background Art

[0002] Piping refers to the phenomenon that fine particles in the soil are carried away by groundwater from the gaps between coarse particles under the action of seepage, resulting in the formation of a continuous seepage channel in the soil, causing the soil to collapse. When piping occurs, if it is not handled in time, the cavity will expand in a very short time, and its momentum is unstoppable, thus causing the collapse of the dam. When piping occurs, the water surface will be overturned. As the upstream water level rises and the duration is prolonged, the dangerous situation continues to worsen. A large amount of water surges and turns over sand, destroying the soil skeleton of the foundation of the embankment and sluice, expanding the channel, and hollowing out the foundation soil, causing the collapse of buildings, resulting in accidents such as breach of dams, collapse of dams, and reversal of sluices.

[0003] During the flood season, when the water level is high, the water flows from the river bank along the soil gaps of the dike foundation to the downstream (i.e., seepage). Because it is restricted by the surrounding wall, it is somewhat similar to the flow of water in a pipe. In particular, after the seepage water flows through the highly permeable layer and flows into the dike underground, it still has great pressure. If it breaks through the clay soil cover layer, it will bring out the silt and fine sand below, causing water and sand gushing, also known as sand turning and water gushing. The development of pipe burst danger is the fastest in the form of "soil flow". It will hollow out the sand layer under the nearby dike (gate) foundation, which will cause the dike (gate) body to suddenly drop, resulting in a dike breach disaster. Therefore, pipe burst is the most serious danger and must be dealt with immediately once discovered.

[0004] Chinese patent CN200910066332.9 discloses a polymer sealing grouting method for emergency rescue of dam pipe bursts. When a pipe burst occurs in a dam, a polymer material is injected into a geotextile bag placed at the pipe burst channel. After the material reacts, the volume expands rapidly and solidifies, thereby quickly blocking the pipe burst channel entrance; then, a polymer material is injected into the pipe burst channel through micropores. After the material reacts, the volume expands rapidly and solidifies, thereby achieving the purpose of blocking the pipe burst channel, reinforcing the dam body, and improving the overall stability of the dam body.

[0005] However, the above method is prone to the problem that the leakage point is difficult to determine when plugging the leak. The geotextile bag can only enter the pipe burst channel at the pipe burst entrance position by water flow, and it is difficult to deliver the geotextile bag to the pipe burst channel section. At the same time, after the geotextile bag completes the plugging of the pipe burst entrance, when the polymer material is injected from the top of the dam body through the hollow steel pipe, the hollow steel pipe is difficult to effectively align with the pipe burst channel, especially when the pipe burst channel is bent in the dam body, it is very easy to cause the polymer material injection position to be wrong, affecting the reliability of the ferry and posing a safety hazard. Summary of the invention

[0006] Based on the above problems, the purpose of the present invention is to provide a method for using a pipe burst water stopping grouting device which has precise positioning, can squeeze the inner wall of the leakage point channel to increase the strength of the leaking pipe position, reduce the water content and thus ensure the reliability of plugging the leak.

[0007] The cam is an air-gap-shaped device for preventing the air from leaking into the airbag, and the airbag is connected with the outer wall of the cam and the airbag is connected with the inner wall of the cam.

[0008] In the above structure, the aspect ratio of the airbag is controlled by the outer tube and the inner tube through mutual expansion and contraction, so as to guide the airbag into the middle section of the pipe burst channel. The inner tube and the outer tube can be made of PVC material, so that they have a certain bending ability, which is convenient for adaptive bending following the direction of the pipe burst channel, and can ensure that the operator's hand feedback is the most direct, and the reliability of filling is ensured; the airbag is connected to the outer tube and the inner tube through the first butt sleeve and the second butt sleeve, and the airbag of appropriate size can be selected according to different pipe burst diameters, so as to ensure that the airbag can accurately cut off the pipe burst water flow when expanded, and at the same time squeeze the sand and gravel around the pipe burst channel, and provide a good fixed positioning foundation for injecting polymer material through the inner tube; while injecting the polymer material, the outer tube is pulled back and retracted back to expand the airbag in time, so as to ensure that the pipe burst channel is gradually filled from the pipe burst outlet to the pipe burst inlet direction, and finally the airbag is further expanded due to the pressure reduction near the riverbed, so that the polymer material forms a conical structure to block the filling, thereby ensuring the density and reliability of the pipe burst channel blocking.

[0009] The present invention is further configured such that, when the inner tube is extended or retracted, a surface passing through the inner portion of the outer tube is provided with a plurality of air guide grooves opened along its axial direction and evenly distributed along the circumferential direction.

[0010] In the above structure, the air guide groove is used to increase the cross section between the inner tube and the outer tube so that the compressed air can be smoothly delivered from the air distribution cylinder into the air bag.

[0011] The present invention is further configured such that the front end of the outer tube is provided with a first external thread, the front end of the inner tube is provided with a second external thread, the inner wall of the first docking sleeve is provided with a first internal thread screwed into the first external thread, and the inner wall of the second docking sleeve is provided with a second internal thread screwed into the second external thread.

[0012] In the above structure, the first butt sleeve and the second butt sleeve are respectively connected to the outer tube and the inner tube through threads, so as to facilitate the disassembly and replacement of the airbag.

[0013] The present invention is further configured such that a first retaining ring is provided on a side of the first external thread facing the rear end of the outer tube; and a second retaining ring is provided on a side of the second external thread facing the rear end of the inner tube.

[0014] In the above structure, the first retaining ring provides a limit for the first butt joint sleeve when it is screwed together with the outer tube; the second retaining ring provides a limit for the second butt joint sleeve when it is screwed together with the inner tube.

[0015] The present invention is further configured such that a constant pressure groove equal in number to and corresponding to the air guide groove is provided at the outer edge of the second retaining ring along its circumferential direction; the outer diameter of the second retaining ring is larger than the inner diameter of the outer tube and smaller than the bottom diameter of the first external thread, so that when the inner tube moves toward the rear end of the outer tube, the second retaining ring abuts against the front end face of the outer tube.

[0016] In the above structure, the constant pressure groove can prevent the second retaining ring from abutting against the end surface of the outer tube when the inner tube is drawn out toward the rear end of the outer tube, thereby interrupting the air supply between the air guide groove and the airbag.

[0017] The present invention is further configured such that the rear end of the airbag is sleeved on the outer wall of the first docking sleeve, and is clamped on the outer wall of the airbag by a tightening ring to achieve a tight connection with the first docking sleeve; the front end of the airbag is turned inward toward the rear end of the airbag so that one side originally located on the outer cylindrical surface of the airbag is sleeved on the second docking sleeve, and is clamped on the outer wall of the airbag by a tightening ring to achieve a tight connection with the second docking sleeve.

[0018] In the above structure, the front end of the airbag is turned inward toward the rear end of the airbag to increase the diameter of the airbag when it is expanded. At the same time, an umbrella-shaped expansion body with the umbrella tip facing the rear end of the outer tube can be formed, which can provide better blocking in the pipe burst channel toward the pipe burst entrance side. When the polymer material is injected, it can prevent the polymer material from overflowing toward the rear end of the outer tube and affecting the expansion of the airbag when it retreats.

[0019] The present invention is further configured such that a detachable anti-blocking cone head is provided at one end of the second butt sleeve facing away from the rear end of the inner tube or at the front end of the inner tube, and the anti-blocking cone head can be removed toward the front end of the inner tube.

[0020] In the above structure, the anti-blocking cone head is preferably arranged on the second docking sleeve. When the airbag is inserted along the pipe burst channel, the anti-blocking cone head prevents sand and stone from entering the grouting channel and causing blockage. When injecting polymer material, the anti-blocking cone head can be directly pushed out of the second docking sleeve to disengage it.

[0021] A method for using a pipe burst water-stopping grouting device comprises the following steps: estimating the inner diameter of a pipe burst channel according to a pipe burst flow rate, selecting an airbag with a suitable expansion diameter, selecting an outer tube and an inner tube with a thickness not less than that of a dam in the horizontal direction, and installing the airbag on the outer tube and the outer tube; pushing the inner tube forward to stretch the airbag fixed to the front end of the inner tube and the outer tube along the axial direction of the airbag to reduce the outer diameter; extending the outer tube and the inner tube together with the airbag into the water and inserting them into the pipe burst channel and advancing them forward into the dam body in the direction of the pipe burst water flow and exceeding at least half the thickness of the dam body; injecting compressed air into an air supply port while pulling the inner tube toward the rear end of the outer tube to cause the airbag to expand in the pipe burst channel to cut off the water flow and compact the surrounding sand and soil tissue; injecting a polymer material through the rear end of the inner tube so that the polymer material flows out from the front end of the inner tube to fill the pipe burst channel in front of the airbag; then, under the condition of maintaining the pressure of the airbag, pulling out the outer tube and continuously injecting the polymer material through the inner tube until the entire pipe burst channel is filled.

[0022] Furthermore, when the outer tube is pulled out while the airbag is maintaining pressure, the inner tube is pushed forward to lengthen the airbag so that the outer diameter of the airbag is reduced, or after the pressure of the airbag is released, the outer tube is pulled out toward the rear end of the outer tube for a distance and then re-inflated to expand the outer diameter of the airbag, so as to avoid the outer tube being unable to be pulled out in batches due to the outer diameter of the airbag being too large.

[0023] Furthermore, the polymer material always remains injected when the outer tube is withdrawn.

[0024] The beneficial effects of the present invention are as follows: the aspect ratio of the airbag is controlled by the outer tube and the inner tube through mutual expansion and contraction, so as to facilitate guiding the airbag into the middle section of the pipe burst channel; the inner tube and the outer tube can be made of PVC material, so that they have a certain bending ability, which is convenient for adaptive bending following the direction of the pipe burst channel, and can ensure that the operator's hand feedback is the most direct, and the reliability of filling is ensured; the airbag is connected to the outer tube and the inner tube through the first butt sleeve and the second butt sleeve, and the airbag of appropriate size can be selected according to different pipe burst diameters, so as to ensure that the airbag can accurately cut off the pipe burst water flow when expanded, and at the same time can squeeze the sand and gravel around the pipe burst channel, and provide a good fixed positioning foundation for injecting polymer material through the inner tube; while injecting the polymer material, the outer tube is pulled back and contracted back to expand the airbag in time, so as to ensure that the pipe burst channel is gradually filled from the pipe burst outlet direction to the pipe burst inlet direction, and finally the airbag is further expanded due to the pressure reduction near the riverbed, so that the polymer material forms a conical structure for blocking, thereby ensuring the density and reliability of the pipe burst channel blocking filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1It is a schematic diagram of the overall structure of the airbag of the present invention in a contracted state.

[0026] Figure 2 It is a schematic diagram of the full cross-section structure of the airbag of the present invention in a deflated state.

[0027] Figure 3 It is a schematic diagram of the overall structure of the airbag of the present invention in an expanded state.

[0028] Figure 4 It is a schematic diagram of the full cross-section structure of the airbag of the present invention in an expanded state.

[0029] Figure 5 It is a schematic diagram of the full cross-section structure of the outer tube of the present invention.

[0030] Figure 6 It is a schematic diagram of the full cross-section structure of the outer tube and the inner tube of the present invention.

[0031] Figure 7 It is a schematic diagram of the fully cutaway explosion structure of the outer tube and the inner tube of the present invention.

[0032] Figure 8 It is a schematic diagram of the fully cutaway explosion structure of the outer tube of the present invention.

[0033] Fig. 9 It is a schematic diagram of the cross-sectional structure of the outer tube and the inner tube of the present invention.

[0034] Fig.10 For the present invention Figure 2 Schematic diagram of the enlarged structure of part A.

[0035] Fig.11 For the present invention Figure 2 Schematic diagram of the enlarged structure of part B.

[0036] Fig.12 For the present invention Figure 4 Schematic diagram of the enlarged structure of part C.

[0037] Fig.13 For the present invention Figure 5 Schematic diagram of the enlarged structure of part D.

[0038] Fig.14 For the present invention Figure 6 Schematic diagram of the enlarged structure of part E.

[0039] Fig.15 For the present invention Figure 7 Schematic diagram of the enlarged structure of part F.

[0040] Fig.16 For the present invention Figure 8 Schematic diagram of the enlarged structure of part G.

[0041] Fig.17 For the present invention Fig. 9 Schematic diagram of the H part amplification structure.

[0042] Fig.18 This is a schematic diagram of the state of the present invention when inserted into the dam body.

[0043] Fig.19 It is a schematic diagram of the state of the airbag of the present invention when the polymer material is injected after being expanded.

[0044] Meaning of the numbers in the figure: 10-outer tube; 11-gas distribution cylinder; 111-air supply port; 12-sliding hole; 13-sealing ring; 14-first external thread; 141-first retaining ring; 20-inner tube; 21-grouting channel; 22-air guide groove; 23-second external thread; 231-second retaining ring; 232-constant pressure groove; 30-air bag; 31-first docking sleeve; 311-first internal thread; 32-second docking sleeve; 321-second internal thread; 33-tightening ring; 40-anti-blocking cone head; 50-inflatable section; a-pipe burst channel; b-polymer material. DETAILED DESCRIPTION

[0045] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0046] refer to Figures 1 to 19 ,like Figures 1 to 19 The pipe burst water stopping grouting device shown in the figure comprises an outer tube 10, wherein an inner tube 20 is provided inside the outer tube 10 and can slide and retract axially relative to the outer tube 10, and an inflatable cross section 50 is left between the inner wall of the outer tube 10 and the outer wall of the inner tube 20; the front end of the inner tube 20 extends outward from the front end of the outer tube 10, and further comprises a detachable air bag 30, wherein the air bag 30 is cylindrical, and a first butt joint sleeve 31 and a second butt joint sleeve 32 are respectively provided at both ends of the air bag 30, wherein the first butt joint sleeve 31 is connected to the front end of the outer tube 10, and the second butt joint sleeve 32 is connected to the inner tube 20 The front end connection makes the inflation section 50 between the outer tube 10 and the inner tube 20 communicate with the airbag 30, and the center of the inner tube 20 is provided with a grouting channel 21 that runs through it; the rear end of the outer tube 10 is provided with a gas distribution cylinder 11 that is communicated with the inflation section 50, and the rear end of the gas distribution cylinder 11 is provided with a sliding hole 12, and the inner wall of the sliding hole 12 is provided with a sealing ring 13. The rear end of the inner tube 20 passes through the sliding hole 12 and seals with the sealing ring 13 to ensure air tightness of the inner tube 20 while it is expanding and contracting, and the gas distribution cylinder 11 is also provided with an air supply port 111 that is communicated with its inner cavity.

[0047] In the above structure, the aspect ratio of the airbag 30 is controlled by the outer tube 10 and the inner tube 20 through mutual expansion and contraction, so as to guide the airbag 30 into the middle section of the pipe burst channel a. The inner tube 10 and the outer tube 20 can be made of PVC material, so that they have a certain bending ability, which is convenient for adaptive bending following the direction of the pipe burst channel a, and can ensure the most direct feedback of the operator's hand feeling and ensure the reliability of filling; the airbag 30 is connected to the outer tube 10 and the inner tube 20 through the first docking sleeve 31 and the second docking sleeve 32, and the airbag 30 of appropriate size can be selected according to different pipe burst diameters. It is ensured that the airbag 30 can accurately cut off the pipe burst water flow when expanded, and at the same time can squeeze the sand and gravel around the pipe burst channel a, providing a good fixed positioning foundation for injecting the polymer material b through the inner tube 20; while injecting the polymer material b, the outer tube 10 is pulled back and retracted back to expand the airbag 30 in time, ensuring that the pipe burst channel a is gradually filled from the pipe burst outlet direction to the pipe burst inlet direction, and finally near the riverbed, the pressure becomes smaller, causing the airbag 30 to expand further, so that the polymer material b forms a conical structure to block, thereby ensuring the density and reliability of the plugging and filling of the pipe burst channel a.

[0048] In this embodiment, the inner tube 20 is provided with a plurality of air guide grooves 22 which are opened along the axial direction and are evenly distributed along the circumferential direction on the surface of the inner tube 20 passing through the inner surface of the outer tube 10 during expansion and contraction.

[0049] In the above structure, the air guide groove 22 is used to increase the cross section between the inner tube 20 and the outer tube 10 so that the compressed air can be smoothly delivered from the air distribution cylinder 11 into the air bag 30.

[0050] In this embodiment, the front end of the outer tube 10 is provided with a first external thread 14, the front end of the inner tube 20 is provided with a second external thread 23, the inner wall of the first docking sleeve 31 is provided with a first internal thread 311 screwed with the first external thread 14, and the inner wall of the second docking sleeve 32 is provided with a second internal thread 321 screwed with the second external thread 23.

[0051] In the above structure, the first butt sleeve 31 and the second butt sleeve 32 are respectively connected to the outer tube 10 and the inner tube 20 through threads, so as to facilitate the disassembly and assembly of the airbag 30 and the replacement of the airbag 30 .

[0052] In this embodiment, a first retaining ring 141 is provided on the side of the first external thread 14 facing the rear end of the outer tube 10 ; a second retaining ring 231 is provided on the side of the second external thread 23 facing the rear end of the inner tube 20 .

[0053] In the above structure, the first retaining ring 141 provides a limit for the first butt sleeve 31 when it is screwed together with the outer tube 10 ; the second retaining ring 231 provides a limit for the second butt sleeve 32 when it is screwed together with the inner tube 20 .

[0054] In this embodiment, the outer edge of the second retaining ring 231 is provided with a constant pressure groove 232 along its circumferential direction, which is equal to and corresponding to the air guide groove 22; the outer diameter of the second retaining ring 231 is larger than the inner diameter of the outer tube 10 and smaller than the root diameter of the first external thread 14, so that when the inner tube 20 moves toward the rear end of the outer tube 10, the second retaining ring 231 is against the front end face of the outer tube 10.

[0055] In the above structure, the constant pressure groove 232 can prevent the second retaining ring 231 from abutting against the end surface of the outer tube 10 when the inner tube 20 is withdrawn toward the rear end of the outer tube 10, thereby interrupting the air supply between the air guide groove 22 and the airbag 30.

[0056] In this embodiment, the rear end of the airbag 30 is sleeved on the outer wall of the first docking sleeve 31, and is clamped on the outer wall of the airbag 30 through a tightening ring 33 to achieve a tightening connection with the first docking sleeve 31; the front end of the airbag 30 is turned inward toward the rear end of the airbag 30 so that the side originally located on the outer cylindrical surface of the airbag 30 is sleeved on the second docking sleeve 32, and is clamped on the outer wall of the airbag 30 through a tightening ring 33 to achieve a tightening connection with the second docking sleeve 32.

[0057] In the above structure, the front end of the airbag 30 is turned inward toward the rear end of the airbag 30 to increase the diameter of the airbag 30 when it is expanded. At the same time, an umbrella-shaped expansion body with the umbrella tip facing the rear end of the outer tube 10 can be formed, which can provide better blocking in the pipe surge channel a toward the pipe surge entrance side. When the polymer material b is injected, it can prevent the polymer material b from overflowing toward the rear end of the outer tube 10 and affecting the expansion of the airbag 30 when it retreats.

[0058] In this embodiment, a detachable anti-blocking cone head 40 is provided at one end of the second docking sleeve 32 facing away from the rear end of the inner tube 20 or at the front end of the inner tube 20 , and the anti-blocking cone head can be removed toward the front end of the inner tube.

[0059] In the above structure, the anti-blocking cone head 40 is preferably arranged on the second docking sleeve 32. When the airbag 20 is inserted along the pipe burst channel a, the anti-blocking cone head 40 prevents sand and stones from entering the grouting channel 21 and causing blockage. When the polymer material b is injected, the anti-blocking cone head 40 can be directly pushed out of the second docking sleeve 32 to disengage it.

[0060] A method for using a pipe burst water-stopping grouting device comprises the following steps: estimating the inner diameter of a pipe burst channel a according to the pipe burst flow rate, selecting an airbag 30 with a suitable expansion diameter, selecting an outer tube 10 and an inner tube 20 that are not less than the horizontal thickness of the dam, and installing the airbag 30 on the outer tube 10 and the outer tube 20; pushing the inner tube 20 forward so that the airbag 30 fixed to the front end of the inner tube 20 and the outer tube 10 is stretched along the axial direction of the airbag 30 to reduce the outer diameter; extending the outer tube 10 and the inner tube 20 together with the airbag 30 into the water, inserting them into the pipe burst channel a, and moving forward along the direction of the pipe burst water flow. Push it into the dam body and at least exceed half the thickness of the dam body; while injecting compressed air into the air supply port 111, pull the inner tube 20 toward the rear end of the outer tube 10 to cause the air bag 30 to expand in the pipe burst channel a to cut off the water flow and compact the surrounding sand and soil tissue; inject the polymer material b through the rear end of the inner tube 20, so that the polymer material b flows out from the front end of the inner tube 20 to fill the pipe burst channel a in front of the air bag 30; then, while the air bag 30 maintains pressure, withdraw the outer tube 10 and continuously inject the polymer material b through the inner tube 20 until the entire pipe burst channel a is filled.

[0061] Furthermore, when the outer tube 10 is pulled out while the airbag 30 is pressurized, the inner tube 20 is pushed forward to lengthen the airbag 30 so that the outer diameter of the airbag 30 is reduced, or after the pressure of the airbag 30 is released, the outer tube 10 is pulled out toward the rear end of the outer tube 10 for a distance and then re-inflated to expand the outer diameter of the airbag 30, so as to avoid the outer tube 10 being unable to be pulled out in batches due to the outer diameter of the airbag 30 being too large.

[0062] Furthermore, when the outer tube 10 is withdrawn, the polymer material b always remains in the injected state.

[0063] The beneficial effects of the present invention are as follows: the aspect ratio of the airbag 30 is controlled by the outer tube 10 and the inner tube 20 being telescopically extended to facilitate guiding the airbag 30 into the middle section of the pipe burst channel a; the inner tube 10 and the outer tube 20 can be made of PVC material, so that they have a certain bending ability, and are convenient for adaptive bending along the direction of the pipe burst channel a, and can ensure that the operator's hand feedback is the most direct, and the filling reliability is ensured; the airbag 30 is connected to the outer tube 10 and the inner tube 20 through the first butt joint sleeve 31 and the second butt joint sleeve 32, and the airbag 30 of a suitable size can be selected for different pipe burst diameters. , ensuring that the airbag 30 can accurately cut off the pipe burst water flow when expanded, and at the same time can squeeze the sand and gravel around the pipe burst channel a, providing a good fixed positioning foundation for injecting the polymer material b through the inner tube 20; while injecting the polymer material b, the outer tube 10 is pulled back and retracted back to expand the airbag 30 in time, ensuring that the pipe burst channel a is gradually filled from the pipe burst outlet direction to the pipe burst inlet direction, and finally near the riverbed The pressure becomes smaller, causing the airbag 30 to expand further, so that the polymer material b forms a cone-shaped structure for plugging, ensuring the density and reliability of the plugging filling of the pipe burst channel a.

[0064] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications of the above assumptions should also be regarded as the scope of protection of the present invention.

Claims

1. A method for using a pipe burst water stopping grouting device, characterized in that: The air bag is a kind of air bag which is made up of a plurality of air bags, each of which has a plurality of air bags, each of which has a plurality of air bags, each of which has a plurality of air bags, each of which has a plurality of air bags. The flow rate is used to estimate the inner diameter of the piping channel, select an airbag with a suitable expansion diameter, select an outer tube and an inner tube that are not less than the horizontal thickness of the dam, and install the airbag on the outer tube and the outer tube; push the inner tube forward to stretch the airbag fixed to the front end of the inner tube and the outer tube along the axial direction of the airbag to reduce the outer diameter; extend the outer tube and the inner tube with the airbag into the water and insert them into the piping channel, and follow the direction of the piping water flow to push them forward to the dam body and exceed at least half the thickness of the dam body; inject compressed air into the air supply port while pulling the inner tube toward the rear end of the outer tube to cause the airbag to expand in the piping channel to cut off the water flow and compact the surrounding sand and soil tissue; inject the polymer material through the rear end of the inner tube, so that the polymer material flows out from the front end of the inner tube to fill the piping channel in front of the airbag; then, while the airbag is maintained under pressure, the outer tube is pulled out and the polymer material is continuously injected through the inner tube until the entire piping channel is filled.

2. The method for using the pipe burst water stopping grouting device according to claim 1, characterized in that: The surface of the inner tube passing through the inner part of the outer tube when the inner tube is extended or retracted is provided with a plurality of air guide grooves opened along the axial direction thereof and evenly distributed along the circumferential direction.

3. The method for using the pipe burst water stopping grouting device according to claim 1 or 2, characterized in that: The front end of the outer tube is provided with a first external thread, the front end of the inner tube is provided with a second external thread, the inner wall of the first butt sleeve is provided with a first internal thread screwed with the first external thread, and the inner wall of the second butt sleeve is provided with a second internal thread screwed with the second external thread.

4. The method for using the pipe burst water stopping grouting device according to claim 3 is characterized in that: A first retaining ring is provided on the side of the first external thread facing the rear end of the outer tube; a second retaining ring is provided on the side of the second external thread facing the rear end of the inner tube.

5. The method for using the pipe burst water stopping grouting device according to claim 4 is characterized in that: The outer edge of the second retaining ring is provided with constant pressure grooves along its circumferential direction, which are equal in number to and corresponding to the air guide grooves; the outer diameter of the second retaining ring is larger than the inner diameter of the outer tube and smaller than the bottom diameter of the first external thread, so that when the inner tube moves toward the rear end of the outer tube, the second retaining ring abuts against the front end face of the outer tube.

6. The method for using the pipe burst water stopping grouting device according to claim 1, characterized in that: The rear end of the airbag is sleeved on the outer wall of the first docking sleeve, and is tightly connected to the first docking sleeve by a tightening ring around the outer wall of the airbag; the front end of the airbag is turned inward toward the rear end of the airbag so that the side originally located on the outer cylindrical surface of the airbag is sleeved on the second docking sleeve, and is tightly connected to the second docking sleeve by a tightening ring around the outer wall of the airbag.

7. The method for using the pipe burst water stopping grouting device according to claim 1, characterized in that: A detachable anti-blocking cone head is provided at one end of the second butt sleeve facing away from the rear end of the inner tube or at the front end of the inner tube, and the anti-blocking cone head can be removed toward the front end of the inner tube.

8. The method for using a pipe burst water stopping grouting device according to claim 1 comprises the following steps: when the outer tube is pulled out while the airbag is maintaining pressure, the inner tube is pushed forward to lengthen the length of the airbag so that the outer diameter of the airbag is reduced; or after releasing the pressure on the airbag, the outer tube is pulled out toward the rear end of the outer tube for a distance and then re-inflated to expand the outer diameter of the airbag, so as to avoid the outer tube being unable to be pulled out in batches due to the outer diameter of the airbag being too large.

9. The method for using the pipe burst water stopping grouting device according to claim 1 or 8, comprising the following steps: the polymer material always remains in an injected state when the outer pipe is withdrawn.

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