Non-excavation repair air bag

Abstract

The invention relates to the technical field of pipeline repair, in particular to a trenchless repair air bag. Comprising a mounting cylinder, the mounting cylinder is fixedly connected with an elastic piece, a bonding piece is wound in the middle of the elastic piece, two symmetrically-distributed mounting rings are fixedly connected to the outer side of the elastic piece, the two mounting rings divide the elastic piece into three sections, an air guide pipe is arranged in the mounting cylinder, the outer side of the elastic piece is wrapped with an inner diaphragm, and the outer side of the inner diaphragm is wrapped with an outer diaphragm. The outer side of the inner diaphragm is wrapped with an outer diaphragm, and the inner diaphragm and the outer diaphragm are jointly used for temporarily shielding the bonding piece. The bonding piece is wrapped by the inner diaphragm and the outer diaphragm, friction between the bonding piece and the pipe wall can be prevented, accumulated water can be isolated, the bonding strength of the bonding piece and the pipeline is guaranteed, in addition, water at the to-be-repaired position of the pipeline is drained through expansion of the elastic piece, the pipeline does not need to be cut off, accumulated water does not need to be cleaned, the repairing steps are reduced, and the repairing efficiency is improved. And the cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of pipeline repair technology, and in particular to a trenchless repair airbag. Background Technology

[0002] Trenchless repair airbags are tools specifically designed for trenchless pipeline repair. They deliver and precisely adhere lining material to pipeline defects without excavating the ground, achieving efficient repair. The lining material is typically resin-impregnated fiberglass cloth. Current processes require cutting off upstream water flow and diverting it downstream before inserting the airbag, while simultaneously draining any accumulated water from the section of pipeline to be repaired. However, this method is complex and costly, especially for low-lying sections where complete drainage is difficult. As the airbag carries the lining material through the pipeline, the lining material comes into direct contact with the water, affecting the adhesion strength between the lining material and the pipeline. Furthermore, friction between the lining material and the pipe wall during movement can easily cause the material to detach from the airbag and disrupt the uniformity of resin distribution, further impacting bonding quality. This results in insufficient adhesion strength between the lining material and the pipeline, significantly shortening the repair lifespan and even causing a decrease in pipeline structural stability, increasing subsequent maintenance costs and safety risks. Summary of the Invention

[0003] This invention provides a trenchless repair airbag to overcome the shortcomings of existing trenchless pipeline repair projects, which are complicated and easily affect the bonding quality between the lining material and the pipeline.

[0004] Technical Solution: A trenchless repair airbag, comprising: an installation cylinder, an elastic element fixedly connected to the installation cylinder, an adhesive element wound around the middle of the elastic element, two symmetrically distributed installation rings fixedly connected to the outer side of the elastic element, the two installation rings dividing the elastic element into three segments, an air guide tube disposed inside the installation cylinder, an inner diaphragm wrapped around the outer side of the elastic element, an outer diaphragm wrapped around the outer side of the inner diaphragm, the inner diaphragm and the outer diaphragm together serving to temporarily shield the adhesive element, the elastic element and the installation cylinder forming a water-proof chamber, a force-applying chamber and a support chamber, the inner diaphragm and the elastic element together forming a drainage chamber, the water-proof chamber, the support chamber and the drainage chamber expanding together to displace water at the location to be repaired, the force-applying chamber being used to press the adhesive element toward the location to be repaired in the pipe, and a control mechanism disposed on the air guide tube for controlling the flow sequence of gas in the air guide tube into the water-proof chamber, the force-applying chamber, the support chamber and the drainage chamber.

[0005] Furthermore, the control mechanism includes: a front air intake assembly, a pressure valve, and a rear air intake assembly. The front air intake assembly is used to connect the water-proof chamber, the support chamber, and the drainage chamber to the air guide pipe. The pressure valve is fixed to the mounting cylinder and passes through the mounting cylinder, the elastic element, and the adjacent mounting ring to connect the drainage chamber to the outside. The rear air intake assembly is used to connect the force application chamber to the air guide pipe.

[0006] Furthermore, the air intake assembly includes: a valve body, an air guide, a mounting shell, a seal, and a first spring, and the number of the valve body, the air guide, the mounting shell, the seal, and the first spring are all three. The valve body is fixedly connected to and communicates with the air guide pipe. The air guide is fixedly connected to and communicates with the adjacent valve body. The three air guides are respectively communicated with the water-proof chamber, the support chamber, and the drainage chamber. The mounting shell is fixedly connected to the adjacent air guide. The seal slides within the adjacent mounting shell and is used to block the corresponding air guide. The first spring is fixedly connected between the adjacent mounting shell and the adjacent seal. The three seals sense the pressure in the water-proof chamber, the support chamber, and the drainage chamber through the force acting on themselves and control the communication state between the water-proof chamber, the support chamber, and the drainage chamber and the air guide pipe.

[0007] Furthermore, the rear air intake assembly includes: a valve housing, a sealing disc, a second spring, and an elastic plate. The valve housing is fixedly connected to and communicates with the air guide pipe. The valve housing communicates with the force application chamber. The sealing disc is located inside the valve housing and has an exhaust port. The second spring is fixedly connected between the sealing disc and the valve housing. The elastic plate is fixedly connected to the side of the sealing disc away from the second spring. The elastic plate contacts the valve housing and is used to block it. The elastic plate is used to allow gas to flow unidirectionally in the exhaust port.

[0008] Furthermore, a butyl rubber layer is provided on both the outer side of the elastic element and the inner side of the inner diaphragm, so that the position where the elastic element contacts the inner diaphragm can be fully fitted.

[0009] Furthermore, both the inner and outer diaphragms are coated with talc powder to reduce the frictional force experienced by the inner and outer diaphragms during deformation.

[0010] Furthermore, the length of the portion of the elastic element wrapped by the inner diaphragm is less than the overall length of the elastic element.

[0011] Furthermore, as the axial distance between the water-proof chamber and the supporting chamber increases, the wall thickness of the elastic element at the position corresponding to the water-proof chamber and the position corresponding to the supporting chamber gradually increases.

[0012] Furthermore, a plurality of evenly distributed support rings are fixed to the inner side of the mounting cylinder. The mounting cylinder is made of elastic rubber, and the support rings are used to keep the inner diameter of the mounting cylinder stable.

[0013] Furthermore, a water-absorbing ring is fixed to the mounting ring located near the support chamber.

[0014] The beneficial effects of adopting the above technical solution are as follows: The present invention uses an inner diaphragm and an outer diaphragm to wrap the adhesive, which can prevent friction between the adhesive and the pipe wall, isolate water accumulation, and ensure the adhesion strength between the adhesive and the pipe. In addition, the expansion of the elastic element can drain the water at the location to be repaired in the pipe, eliminating the need to cut off the pipe and clean up the water accumulation, reducing repair steps and lowering costs.

[0015] By using the sealing element to sense the pressure in the watertight chamber, support chamber, and drainage chamber, the unnecessary expansion of the elastic element is reduced while achieving the purpose of drainage. This controls the maximum expansion range of the elastic element during the repair process, reduces the damage to the elastic element, and increases the number of pressure-bearing deformation cycles.

[0016] By limiting the wall thickness variation of the elastic element, the elastic element and the inner diaphragm together form a shuttle shape when expanding (the position of the inner diaphragm corresponding to the drainage chamber is a shuttle shape without a tip when expanding), so that the inner diaphragm can gradually fit with the pipe wall from the middle, thereby squeezing out the water accumulated in the pipe and improving the drainage effect. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the elastic element and adhesive element of the present invention; Figure 3 This is a three-dimensional structural diagram of the elastic element and the air guide tube of the present invention; Figure 4 This is a three-dimensional structural cross-sectional view of the mounting cylinder and elastic element of the present invention; Figure 5 This is an exploded view of the mounting cylinder, elastic element, and air guide tube of the present invention; Figure 6 Appendix to this invention Figure 4 Enlarged view of point A in the middle; Figure 7 Appendix to this invention Figure 4 Enlarged view of point B in the middle; Figure 8This is a three-dimensional structural cross-sectional view of the air guide and mounting shell of the present invention; Figure 9 This is a three-dimensional structural cross-sectional view of the valve housing and sealing disc of the present invention; Figure 10 This is a three-dimensional structural diagram of the elastic element and inner diaphragm of the present invention during expansion and drainage. Figure 11 This is a three-dimensional structural diagram of the elastic element expanding and extruding the adhesive component according to the present invention.

[0018] In the diagram: 1. Mounting cylinder, 2. Elastic element, 201. Waterproof chamber, 202. Force-applying chamber, 203. Support chamber, 3. Adhesive component, 4. Mounting ring, 5. Air guide tube, 6. Inner diaphragm, 601. Drainage chamber, 7. Outer diaphragm, 8. Valve body, 9. Air guide component, 10. Mounting shell, 11. Sealing component, 12. First spring, 13. Pressure valve, 14. Valve shell, 15. Sealing disc, 151. Vent hole, 16. Second spring, 17. Elastic sheet, 18. Support ring, 19. Water suction ring. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0020] Example 1

[0021] This embodiment provides a trenchless repair airbag to solve the problems of complex engineering and poor adhesion between the lining material and the pipeline in existing trenchless pipeline repair.

[0022] See Figures 1 to 5 , Figure 10 and Figure 11A trenchless repair airbag includes: a mounting cylinder 1, with an elastic element 2 fixedly connected to the mounting cylinder 1. The left and right sides of the elastic element 2 are bonded to the mounting cylinder 1, and an adhesive element 3, which is an inner lining material, is wound around the middle of the elastic element 2; two symmetrically distributed mounting rings 4 are fixedly connected to the outer side of the elastic element 2. Each mounting ring 4 is composed of two semi-circular rings spliced ​​together, and the mounting rings 4 are detachably connected to the mounting cylinder 1 by bolts. The two mounting rings 4 divide the elastic element 2 into three segments: left, middle, and right, and the elastic element 2 is connected to the mounting rings 4. The contact point is always in contact with the outside of the mounting cylinder 1 under the constraint of the mounting ring 4; the mounting cylinder 1 is provided with an air guide pipe 5, which is connected to an external air pump through a conduit; the outer side of the elastic element 2 is wrapped with an inner diaphragm 6, and the outer side of the inner diaphragm 6 is wrapped with an outer diaphragm 7. Both the inner diaphragm 6 and the outer diaphragm 7 are made of elastic rubber, and initially, both the inner diaphragm 6 and the outer diaphragm 7 are in a folded state with a U-shaped cross-section; the inner diaphragm 6 and the outer diaphragm 7 are used together to temporarily shield the adhesive element 3, and the inner diaphragm 6 and the outer diaphragm 7... The left side is connected to the outside via pull ropes. The attached diagram only shows the holes on the inner diaphragm 6 and outer diaphragm 7 for connecting the pull ropes. The inner diaphragm 6 and outer diaphragm 7 are designed to reduce the relative friction between the inner diaphragm 6 and outer diaphragm 7 and the elastic element 2 and the pipe wall, respectively, when the inner diaphragm 6 and outer diaphragm 7 are released from their obstruction of the adhesive element 3. This facilitates the separation of the inner diaphragm 6 and outer diaphragm 7 from the elastic element 2. The three sections of the elastic element 2 form a water-proof chamber 201, a force-applying chamber 202, and a support chamber 2 with the mounting cylinder 1, respectively. 03. The inner diaphragm 6 and the elastic element 2 together form a drainage chamber 601. The adhesive element 3 is located in the drainage chamber 601. The water-proof chamber 201, the support chamber 203 and the drainage chamber 601 expand together to drain the water at the location to be repaired. The force-applying chamber 202 is used to squeeze the adhesive element 3 toward the location to be repaired in the pipe. The air guide pipe 5 is provided with a control mechanism for controlling the flow sequence of gas in the air guide pipe 5 into the water-proof chamber 201, the force-applying chamber 202, the support chamber 203 and the drainage chamber 601.

[0023] The above setup enables the following: by wrapping the adhesive component 3 with the inner diaphragm 6 and the outer diaphragm 7, friction between the adhesive component 3 and the pipe wall can be prevented, water accumulation can be isolated, and the bonding strength between the adhesive component 3 and the pipe can be guaranteed. In addition, the expansion of the elastic component 2 can drain the water at the location to be repaired in the pipe, eliminating the need to cut off the pipe and clean up the water accumulation, reducing repair steps and lowering costs.

[0024] See Figures 3 to 6 The control mechanism includes: an inlet air assembly, a pressure valve 13, and a rear air assembly. The inlet air assembly is used to connect the water-proof chamber 201, the support chamber 203, and the drainage chamber 601 to the air guide pipe 5. The pressure valve 13 is fixed to the mounting cylinder 1 and passes through the mounting cylinder 1, the elastic element 2, and the adjacent mounting ring 4 to connect the drainage chamber 601 to the outside. The rear air assembly is used to connect the force application chamber 202 to the air guide pipe 5.

[0025] See Figure 6 and Figure 8 The inlet air assembly includes: a valve body 8, an air guide 9, a mounting shell 10, a seal 11, and a first spring 12. There are three valve bodies 8, three air guides 9, three mounting shells 10, three seals 11, and three first springs 12. The valve body 8 is fixedly connected to and communicates with the air guide pipe 5. The air guide 9 is fixedly connected to and communicates with the adjacent valve body 8. The three air guides 9 communicate with the water-proof chamber 201, the support chamber 203, and the drainage chamber 601, respectively. A through groove is provided on the upper periphery of the air guide 9 for gas flow. The mounting shell 10 is fixedly connected to the upper part of the adjacent air guide 9. The seal 11 slides within the adjacent mounting shell 10 for sealing. The seal 11 is used to block the corresponding air guide 9. The seal 11 is composed of a piston, a connecting rod, and a disc connected together. The diameter of the disc of the sealing element 11 is larger than the inner diameter of the air guide 9. Initially, the disc of the sealing element 11 does not contact the air guide 9. In this state, the gas can flow from the air guide tube 5 into the through groove of the air guide 9. The first spring 12 is fixed between the piston of the adjacent mounting shell 10 and the adjacent sealing element 11. The piston of the sealing element 11 is simultaneously subjected to the downward elastic force of the adjacent first spring 12 and the upward pressure in the water-proof chamber 201, the support chamber 203 or the drainage chamber 601 (the gas pressure in the mounting shell 10 is negligible). The three sealing elements 11 sense the pressure in the water-proof chamber 201, the support chamber 203 and the drainage chamber 601 through the force acting on themselves and control the connection state between the water-proof chamber 201, the support chamber 203 and the drainage chamber 601 and the air guide tube 5.

[0026] See Figures 3 to 5 and Figure 9 The rear air intake assembly includes: a valve housing 14, a sealing disc 15, a second spring 16, and an elastic plate 17. The valve housing 14 is fixedly connected to and communicates with the air guide pipe 5, and is connected to the force application chamber 202. The sealing disc 15 is located inside the valve housing 14, and initially, the sealing disc 15 seals the valve housing 14. The sealing disc 15 is provided with six evenly distributed annular exhaust holes 151. The second spring 16 is fixedly connected between the sealing disc 15 and the valve housing 14. The elastic plate 17 is fixedly connected to the lower side of the sealing disc 15, and the elastic plate 17 has a central section with... The rubber disc with an asterisk-shaped groove forms six fan-shaped sections in the middle of the elastic disc 17, and the six fan-shaped sections of the elastic disc 17 correspond to the six exhaust holes 151 respectively, allowing the gas to flow unidirectionally downward in the exhaust holes 151. The elastic disc 17 contacts the valve housing 14 and is used to seal it. When the gas flows from the air guide pipe 5 into the force application chamber 202, the rear air intake assembly acts as a pressure control valve, and in this state, the pressure that opens the rear air intake assembly is greater than the pressure that opens the pressure valve 13.

[0027] See Figure 1 and Figure 4The length of the portion of the elastic element 2 wrapped by the inner diaphragm 6 is less than the overall length of the elastic element 2, and the right side of the inner diaphragm 6 is located in the middle of the position corresponding to the elastic element 2 and the support chamber 203, so that the right side of the elastic element 2 and the support chamber 203 can directly contact the pipe wall, thereby providing support and positioning for the entire elastic element 2.

[0028] See Figure 2 Butyl rubber layers are provided on the outer side of the elastic element 2 and the inner side of the inner diaphragm 6, so that the contact points between the elastic element 2 and the inner diaphragm 6 can be fully fitted, thereby enhancing the sealing between the elastic element 2 and the inner diaphragm 6.

[0029] Pipeline repair process: Workers wrap plastic wrap around the middle of the elastic component 2, and then wrap the resin-impregnated adhesive component 3 around the middle of the elastic component 2; the inner diaphragm 6 and the outer diaphragm 7 are fitted together on the surface of the elastic component 2 and the adhesive component 3, and the pull rope is connected to the hole on the left side of the inner diaphragm 6 and the outer diaphragm 7; the air pipe 5 is connected to the air pump using the conduit, and then the manhole cover upstream of the pipeline to be repaired is opened, and the device is sent into the pipeline through the manhole, and the device is moved to the pipeline to be repaired by the water flow in the pipeline.

[0030] When the adhesive component 3 aligns with the position to be repaired on the pipe, the device is stopped moving inside the pipe by traction guide tube and pull rope. At this time, air is injected into the air guide tube 5 by air pump. The gas in the air guide tube 5 enters the water-proof chamber 201, support chamber 203 and drainage chamber 601 through the three air guide components 9 respectively, causing the left and right parts of the elastic component 2, the inner diaphragm 6 and the outer diaphragm 7 to expand together. The pressure in the air guide tube 5, the water-proof chamber 201, the support chamber 203 and the drainage chamber 601 gradually increases. Among them, the pressure in the elastic component 2, the inner diaphragm 6 and the outer diaphragm 7 gradually increases. Due to the elasticity of the membrane 6 and the outer diaphragm 7, under the same pressure change, the outward expansion of the drainage chamber 601 is greater than that of the water-proof chamber 201 and the support chamber 203. Therefore, the middle part of the outer side of the outer diaphragm 7 will first adhere to the pipe wall. Then, the outer side of the outer diaphragm 7 will gradually adhere to the pipe wall from the middle to the left and right sides. Finally, when a part of the right side of the elastic element 2 adheres to the pipe wall, the outer side of the outer diaphragm 7 and the corresponding position of the drainage chamber 601 will be completely adhered to the pipe wall, thus draining the water accumulated at the location to be repaired in the pipeline.

[0031] As the pressure in the watertight chamber 201, support chamber 203, and drainage chamber 601 gradually increases, the piston of the sealing element 11 gradually experiences an upward thrust from the air pressure, which pushes the sealing element 11 upward and compresses the first spring 12. When a portion of the right side of the elastic element 2 is in contact with the pipe wall, the disc of the sealing element 11 contacts the air guide 9. At this time, the sealing element 11 blocks the air guide 9, preventing the gas in the air guide pipe 5 from continuing to be delivered into the watertight chamber 201, support chamber 203, and drainage chamber 601. In this way, by using the sealing element 11 to sense the pressure in the watertight chamber 201, support chamber 203, and drainage chamber 601, the drainage purpose is achieved while reducing unnecessary expansion of the elastic element 2, thereby controlling the maximum expansion amplitude of the elastic element 2 during the repair process, reducing the damage to the elastic element 2, and increasing the number of pressure-bearing deformation cycles.

[0032] After the seal 11 blocks the air guide 9, the pressure inside the air guide tube 5 increases rapidly as the air pump operates. This allows personnel outside the tube to see that the outer side of the outer diaphragm 7 is now in contact with the tube wall. At this point, the personnel pull the rope and continue injecting air into the air guide tube 5. The rope pulls the inner diaphragm 6 and the outer diaphragm 7 to the left, causing the length of the outer side of the inner diaphragm 6 and the inner side of the outer diaphragm 7 to gradually increase, while the length of the inner side of the inner diaphragm 6 and the outer side of the outer diaphragm 7 gradually decreases. During this process, the inner side of the inner diaphragm 6 and the outer diaphragm 7... The outer side of 7 is kept relatively stationary by the frictional force given by the elastic element 2 and the pipe wall, and the right side of the inner diaphragm 6 and the outer diaphragm 7 gradually moves to the left. The contact area between the inner diaphragm 6 and the elastic element 2 gradually decreases. The shape of the right side of the elastic element 2 changes with the movement of the right side of the inner diaphragm 6, so that the contact area between the right side of the elastic element 2 and the pipe wall gradually increases. Then the inner diaphragm 6 completely loses contact with the right side of the elastic element 2 (note: at this time, the drainage chamber 601 is composed of the pipe wall and the elastic element 2). Finally, the inner diaphragm 6 separates from the elastic element 2.

[0033] During the pulling of the rope by the staff, the pressure inside the air guide tube 5 gradually increases, eventually reaching a pressure sufficient to move the sealing disc 15. This causes the sealing disc 15 and the elastic plate 17 to move upward, releasing the seal on the valve shell 14. This allows the gas in the air guide tube 5 to flow into the force application chamber 202, which expands and causes the adhesive component 3 to deform. This causes the overlapping area of ​​the adhesive component 3 to gradually decrease and the diameter of the enclosed cylinder to gradually increase. Eventually, the adhesive component 3 comes into contact with the pipe wall. At this point, the air pump continues to inject air, causing the pressure inside the force application chamber 202 to continue to increase. This, in turn, increases the squeezing force of the elastic component 2 on the adhesive component 3 until the pressure inside the force application chamber 202 reaches a specified value (the squeezing force of the elastic component 2 on the adhesive component 3 corresponding to this value is sufficient to make the adhesive component 3 completely adhere to the pipe wall). Then, the air pump is stopped, and the pressure inside the air guide tube 5 remains unchanged (at this time, the sealing disc 15 moves downward under the elastic force of the second spring 16 and re-seals the valve shell 14). After the resin cures, the repair of the pipeline is completed.

[0034] As the volume of the force-applying chamber 202 gradually increases, the volume of the drainage chamber 601 gradually decreases, causing the pressure inside the drainage chamber 601 to increase. At this time, the gas inside the drainage chamber 601 flows to the outside through the pressure valve 13, thus keeping the pressure inside the drainage chamber 601 constant.

[0035] After the resin in the adhesive component 3 has cured, the air pump is started and the gas in the air guide tube 5 is extracted. During this process, the air pressure in the air guide tube 5 exerts a downward pulling force on the sealing component 11, causing the sealing component 11 to move down and release the blockage on the air guide component 9. This allows the gas in the water-proof chamber, the support chamber 203, and the drainage chamber 601 to gradually enter the air guide tube 5. At the same time, the upper and lower sides of the elastic sheet 17 are deformed due to the pressure difference, causing the elastic sheet 17 to release the blockage on the exhaust port 151. At this time, the gas in the force application chamber 202 gradually enters the air guide tube 5, causing the elastic component 2 to gradually return to its original shape. Then, the staff removes the device from the pipeline through the conduit.

[0036] Example 2

[0037] This embodiment is a further optimization based on Embodiment 1.

[0038] See Figure 5 The inner diaphragm 6 and the outer diaphragm 7 are both coated with talc powder to reduce the friction force on the inner diaphragm 6 and the outer diaphragm 7 when they are deformed, so that the left side of the inner diaphragm 6 and the outer diaphragm 7 can gradually deform when they are pulled.

[0039] Example 3

[0040] This embodiment is a further optimization based on embodiment 2, which improves the drainage effect and reduces the volume of water remaining between the inner diaphragm 6 and the pipe wall.

[0041] See Figure 6 and Figure 7 As the axial distance between the water-proof chamber 201 and the support chamber 203 increases, the wall thickness of the elastic element 2 at the position corresponding to the water-proof chamber 201 and the position corresponding to the support chamber 203 gradually increases. By limiting the wall thickness change of the left and right parts of the elastic element 2, the left and right parts of the elastic element 2 form a frustum shape when they expand. This, together with the expansion of the inner diaphragm 6, forms a shuttle shape (the position of the inner diaphragm 6 corresponding to the drainage chamber 601 is a shuttle shape without a tip when it expands). This allows the inner diaphragm 6 to gradually fit against the pipe wall from the middle, thereby squeezing out the water accumulated in the pipe and improving the drainage effect.

[0042] Example 4

[0043] This embodiment is a further optimization based on embodiment 3, providing a function that facilitates the placement of this device inside a pipeline.

[0044] When placing the repair airbag into the pipe to be repaired, it is usually placed in a manhole near the location of the pipe to be repaired. Since the manhole and the pipe to be repaired are perpendicular, the device is designed to be flexible, which makes it easier to place the device into the pipe.

[0045] See Figure 4 and Figure 5 Multiple support rings 18 are evenly distributed and fixed to the inner side of the mounting cylinder 1. The mounting cylinder 1 is made of elastic rubber and the support rings 18 are made of metal. They are used to keep the inner diameter of the mounting cylinder 1 stable and do not hinder the bending of the mounting cylinder 1, so that the device can be easily inserted into the pipeline from the wellhead.

[0046] Example 5

[0047] This embodiment is a further optimization based on embodiment 4, providing the function of absorbing accumulated water to prevent the accumulated water from contacting the adhesive 3.

[0048] See Figure 2 and Figure 3 The mounting ring 4 on the right side is fixed with a water-absorbing ring 19. The water-absorbing ring 19 is made of sponge. When the inner diaphragm 6 loses contact with the right side of the elastic element 2, the water-absorbing ring 19 absorbs the small amount of water that accumulates at the position where the inner diaphragm 6 contacts the elastic element 2, thereby reducing the probability of the water coming into contact with the adhesive element 3, and thus reducing the impact on the adhesion strength between the adhesive element 3 and the pipe.

[0049] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A trenchless repair airbag, characterized in that, include: An installation cylinder (1) is fixedly connected to an elastic element (2). An adhesive element (3) is wound around the middle of the elastic element (2). Two symmetrically distributed installation rings (4) are fixedly connected to the outer side of the elastic element (2). The two installation rings (4) divide the elastic element (2) into three sections. An air guide tube (5) is provided inside the installation cylinder (1). An inner diaphragm (6) is wrapped around the outer side of the elastic element (2). An outer diaphragm (7) is wrapped around the outer side of the inner diaphragm (6). The inner diaphragm (6) and the outer diaphragm (7) are used together to temporarily shield the adhesive element (3). The elastic element (2) and the installation cylinder (1) form a water-proof chamber (201). The system includes a force-applying chamber (202) and a support chamber (203). The inner diaphragm (6) and the elastic element (2) together form a drainage chamber (601). The water-proof chamber (201), the support chamber (203) and the drainage chamber (601) expand together to drain the water from the location to be repaired. The force-applying chamber (202) is used to press the adhesive element (3) toward the location to be repaired in the pipe. The air guide pipe (5) is provided with a control mechanism for controlling the flow order of gas in the air guide pipe (5) into the water-proof chamber (201), the force-applying chamber (202), the support chamber (203) and the drainage chamber (601).

2. A trenchless repair airbag according to claim 1, characterized in that, The regulatory agencies include: The inlet air assembly, pressure valve (13), and rear air assembly are provided. The inlet air assembly is used to connect the water-proof chamber (201), the support chamber (203), and the drainage chamber (601) to the air guide pipe (5). The pressure valve (13) is fixed to the mounting cylinder (1) and passes through the mounting cylinder (1), the elastic element (2), and the adjacent mounting ring (4) to connect the drainage chamber (601) to the outside. The rear air assembly is used to connect the force application chamber (202) to the air guide pipe (5).

3. A trenchless repair airbag according to claim 2, characterized in that, The front air intake assembly includes: The system comprises a valve body (8), an air guide (9), a mounting shell (10), a seal (11), and a first spring (12), with three of each. The valve body (8) is fixedly connected to and communicates with the air guide pipe (5). The air guide (9) is fixedly connected to and communicates with the adjacent valve body (8). The three air guides (9) are respectively connected to the water-proof chamber (201), the support chamber (203), and the drainage chamber (601). The mounting shell (10) is connected to the adjacent air guide (9). The sealing element (11) is fixedly connected to the adjacent mounting shell (10) and slides in a sealing manner. The sealing element (11) is used to block the corresponding air guide (9). The first spring (12) is fixedly connected between the adjacent mounting shell (10) and the adjacent sealing element (11). The three sealing elements (11) respectively sense the pressure in the water-proof chamber (201), the support chamber (203) and the drainage chamber (601) through the force acting on themselves and control the communication state between the water-proof chamber (201), the support chamber (203) and the drainage chamber (601) and the air guide (5).

4. A trenchless repair airbag according to claim 2, characterized in that, The rear air intake assembly includes: The valve housing (14), sealing disc (15), second spring (16), and elastic plate (17) are provided. The valve housing (14) is fixed and connected to the gas guide pipe (5). The valve housing (14) is connected to the force application chamber (202). The sealing disc (15) is located inside the valve housing (14). The sealing disc (15) is provided with an exhaust hole (151). The second spring (16) is fixed between the sealing disc (15) and the valve housing (14). The elastic plate (17) is fixed to the side of the sealing disc (15) away from the second spring (16). The elastic plate (17) contacts the valve housing (14) and is used to block it. The elastic plate (17) is used to make the gas flow unidirectionally in the exhaust hole (151).

5. A trenchless repair airbag according to claim 1, characterized in that, Butyl rubber layers are provided on the outer side of the elastic element (2) and the inner side of the inner diaphragm (6) so that the contact position between the elastic element (2) and the inner diaphragm (6) can be fully fitted.

6. A trenchless repair airbag according to claim 1, characterized in that, The inner diaphragm (6) and the outer diaphragm (7) are both coated with talc powder to reduce the frictional force experienced by the inner diaphragm (6) and the outer diaphragm (7) when they deform.

7. A trenchless repair airbag according to claim 1, characterized in that, The length of the portion of the elastic element (2) that is wrapped by the inner diaphragm (6) is less than the overall length of the elastic element (2).

8. A trenchless repair airbag according to claim 1, characterized in that, As the axial distance between the water-proof chamber (201) and the support chamber (203) increases, the wall thickness of the elastic member (2) at the position corresponding to the water-proof chamber (201) and the position corresponding to the support chamber (203) gradually increases.

9. A trenchless repair airbag according to claim 1, characterized in that, The mounting cylinder (1) has a plurality of evenly distributed support rings (18) fixed to its inner side. The mounting cylinder (1) is made of elastic rubber, and the support rings (18) are used to keep the inner diameter of the mounting cylinder (1) stable.

10. A trenchless repair airbag according to claim 1, characterized in that, A water-absorbing ring (19) is fixed to the mounting ring (4) near the support chamber (203).

Images