A trenchless repair airbag

Abstract

The application relates to the technical field of pipeline repair, in particular to a trenchless repair air bag. The air bag comprises a mounting cylinder, the mounting cylinder is fixedly connected with an elastic element, the middle part of the elastic element is wound with an adhesive element, the outer side of the elastic element is fixedly connected with two symmetrically-distributed mounting rings, the two mounting rings divide the elastic element into three sections, a gas guide pipe is arranged in the mounting cylinder, the outer side of the elastic element is wrapped with an inner diaphragm, the outer side of the inner diaphragm is wrapped with an outer diaphragm, and the inner diaphragm and the outer diaphragm are used for temporarily shielding the adhesive element. The adhesive element is wrapped with the inner diaphragm and the outer diaphragm, so that friction between the adhesive element and the pipe wall can be prevented, and the adhesive element can be isolated from accumulated water, the adhesive strength between the adhesive element and the pipeline is guaranteed, in addition, water at the position to be repaired of the pipeline is discharged through expansion of the elastic element, the pipeline does not need to be cut off and the accumulated water does not need to be cleaned, the repair steps are reduced, and the cost is lowered.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline repair, in particular to a trenchless repair air bag. BACKGROUND

[0002] The trenchless repair air bag is a tool specially used for pipeline trenchless repair, which can deliver and accurately fit the lining material to the defect position of the pipeline without excavating the ground, realizing efficient repair; wherein the lining material is usually glass fiber cloth impregnated with resin, and in the current process, before the repair air bag is placed into the pipeline, the upstream water flow needs to be cut off and diverted to the downstream, and the accumulated water in the pipeline to be repaired is also emptied, but this way is complicated and high in cost, especially for low-lying pipe sections, it is difficult to completely drain the accumulated water in them, so that the lining material directly contacts with the water in the pipeline during the movement of the lining material carried by the repair air bag, affecting the adhesion strength of the lining material and the pipeline; at the same time, if the lining material rubs against the pipe wall during movement, not only the material and the air bag are easy to separate, but also the uniformity of resin distribution is disturbed, further affecting the bonding quality, resulting in insufficient adhesion strength of the lining material and the pipeline, leading to significant shortening of the repair life, even causing the decrease of the structural stability of the pipeline, increasing the maintenance cost and safety risk in the later period. SUMMARY

[0003] The present application provides a trenchless repair air bag to overcome the shortcomings of the existing trenchless pipeline repair project, which is complicated and easy to affect the bonding quality of the lining material and the pipeline.

[0004] Technical scheme: A trenchless repair air bag, comprising: a mounting cylinder, the mounting cylinder is fixedly connected with an elastic member, the middle part of the elastic member is wound with an adhesive member, the outer side of the elastic member is fixedly connected with two symmetrically distributed mounting rings, the two mounting rings divide the elastic member into three sections, a gas guide pipe is arranged in the mounting cylinder, the outer side of the elastic member is wrapped with an inner diaphragm, the outer side of the inner diaphragm is wrapped with an outer diaphragm, the inner diaphragm and the outer diaphragm are used together to temporarily shield the adhesive member, the elastic member and the mounting cylinder form a water isolation chamber, a force applying chamber and a supporting chamber, the inner diaphragm and the elastic member together form a drainage chamber, the water isolation chamber, the supporting chamber and the drainage chamber are inflated together to expel the water at the position to be repaired, the force applying chamber is used to extrude the adhesive member to the position to be repaired of the pipeline, a control mechanism is arranged on the gas guide pipe for controlling the flow sequence of the gas in the gas guide pipe to the water isolation chamber, the force applying chamber, the supporting chamber and the drainage chamber.

[0005] Further, the regulating mechanism comprises: a front air inlet assembly for connecting the water separation chamber, the support chamber and the water drainage chamber with the air guide pipe; a pressure valve fixedly connected with the mounting cylinder and penetrating the mounting cylinder, the elastic member and the adjacent mounting ring, for connecting the water drainage chamber with the outside; and a rear air inlet assembly for connecting the force applying chamber with the air guide pipe.

[0006] Further, the front air inlet assembly comprises: three valve bodies fixedly connected with the air guide pipe; three air guides fixedly connected with the adjacent valve bodies and connected with the water separation chamber, the support chamber and the water drainage chamber respectively; three mounting shells fixedly connected with the adjacent air guides; three sealing members sealingly sliding in the adjacent mounting shells and used for blocking the corresponding air guides; and three first springs fixedly connected between the adjacent mounting shells and the adjacent sealing members, for sensing the pressure in the water separation chamber, the support chamber and the water drainage chamber and controlling the connection state of the water separation chamber, the support chamber and the water drainage chamber with the air guide pipe.

[0007] Further, the rear air inlet assembly comprises: a valve shell fixedly connected with the air guide pipe and connected with the force applying chamber; a sealing disc located in the valve shell and provided with an air outlet hole; a second spring fixedly connected between the sealing disc and the valve shell; and an elastic sheet fixedly connected with the sealing disc away from the second spring and in contact with and used for blocking the valve shell, for allowing the gas to flow in the air outlet hole in a unidirectional manner.

[0008] Further, the outer side of the elastic member and the inner side of the inner diaphragm are provided with butyl rubber layers, so that the position where the elastic member contacts the inner diaphragm can be fully adhered.

[0009] Further, the inner diaphragm and the outer diaphragm are coated with talcum powder, for reducing the friction force when the inner diaphragm and the outer diaphragm deform.

[0010] Further, the length of the part of the elastic member wrapped by the inner diaphragm is less than the overall length of the elastic member.

[0011] Further, with the increase of the axial distance between the water isolation chamber and the support chamber, the wall thickness of the elastic member corresponding to the water isolation chamber and the wall thickness of the elastic member corresponding to the support chamber gradually increase.

[0012] Further, the inner side of the mounting cylinder is fixedly connected with a plurality of support rings which are uniformly distributed, the mounting cylinder is made of elastic rubber material, and the support rings are used for keeping the inner diameter of the mounting cylinder stable.

[0013] Further, the mounting ring close to the position of the support chamber is fixedly connected with a water absorption ring.

[0014] The beneficial effects generated by the above technical scheme are that the inner and outer diaphragms are used to wrap the adhesive member, which can prevent friction between the adhesive member and the pipe wall, isolate the accumulated water, ensure the adhesion strength of the adhesive member and the pipe, and through the expansion of the elastic member, the water at the position to be repaired of the pipe is discharged, the pipe does not need to be cut off and the accumulated water does not need to be cleaned, the repair steps are reduced, and the cost is reduced.

[0015] The sealing member is used to sense the pressure in the water isolation chamber, the support chamber and the drainage chamber, which can achieve the drainage purpose, reduce unnecessary expansion of the elastic member, control the maximum expansion range of the elastic member in the repair process, reduce the damage of the elastic member, and improve the number of pressure deformation.

[0016] By limiting the wall thickness change of the elastic member, the elastic member and the inner diaphragm form a shuttle shape (the position corresponding to the drainage chamber of the inner diaphragm is a shuttle shape without a sharp end when expanding) when expanding, the inner diaphragm can gradually adhere to the pipe wall from the middle, and then the accumulated water in the pipe is squeezed and discharged, and the drainage effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present application;

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the elastic member and the adhesive member of the present application;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the elastic member and the air guide pipe of the present application;

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the mounting cylinder and the elastic member of the present application;

[0021] Figure 5 It is an exploded view of the mounting cylinder, the elastic member and the air guide pipe of the present application;

[0022] Figure 6 It is an enlarged view of the part A in the accompanying drawing of the present application; Figure 4 ​

[0023] Figure 7 For the invention Figure 4 Enlarged view at B in the figure;

[0024] Figure 8 For the invention is the three-dimensional structure of the installation shell and the gas guide piece profile view;

[0025] Figure 9 For the invention is the three-dimensional structure of the valve shell and the sealing disc profile view;

[0026] Figure 10 For the invention is the three-dimensional structure of the elastic member and the inner diaphragm when the water is drained profile view;

[0027] Figure 11 For the invention is the three-dimensional structure of the elastic member when the adhesive member is extruded profile view.

[0028] In the figure: 1, installation cylinder, 2, elastic member, 201, water chamber, 202, force chamber, 203, support chamber, 3, adhesive member, 4, installation ring, 5, gas guide pipe, 6, inner diaphragm, 601, drainage chamber, 7, outer diaphragm, 8, valve body, 9, gas guide piece, 10, installation shell, 11, sealing member, 12, first spring, 13, pressure valve, 14, valve shell, 15, sealing disc, 151, exhaust hole, 16, second spring, 17, elastic sheet, 18, support ring, 19, water absorption ring. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, purposes and effects of the present invention easy to understand, the present invention is further described below in combination with specific embodiments.

[0030] Example 1

[0031] The present embodiment provides a kind of trenchless repair air bag, to solve the problems of existing non-excavation pipeline repair engineering complex, influence lining material and pipe adhesion quality.

[0032] Referring to Figures 1 to 5 、 Figure 10 And Figure 11The utility model provides a kind of trenchless repair air bag, comprising: installation cylinder 1, installation cylinder 1 is fixed with elastic element 2, the left and right sides of elastic element 2 are bonded with installation cylinder 1, the middle part of elastic element 2 is wound with bonding element 3, and bonding element 3 is inner lining material;The outside of elastic element 2 is fixed with the two installation rings 4 of symmetrical distribution, single installation ring 4 is spliced by two semicircular rings, and installation ring 4 is detachably connected with installation cylinder 1 by bolt, and two installation rings 4 divide elastic element 2 into left, middle and right three sections, and the position of elastic element 2 and installation ring 4 contact is always consistent with the outside of installation cylinder 1 under the limiting effect of installation ring 4;Air pipe 5 is provided in installation cylinder 1, air pipe 5 is communicated with outside air pump by pipe, and the outside of elastic element 2 is wrapped with inner diaphragm 6, and the outside of inner diaphragm 6 is wrapped with outer diaphragm 7, and inner diaphragm 6 and outer diaphragm 7 are all elastic rubber material, and initially, inner diaphragm 6 and outer diaphragm 7 are all folded state, and section is U-shaped;Inner diaphragm 6 and outer diaphragm 7 are used for temporarily shielding bonding element 3, and the left part of inner diaphragm 6 and outer diaphragm 7 is connected with outside by pull rope, and only the hole of inner diaphragm 6 and outer diaphragm 7 for connecting pull rope is embodied in drawing;The setting of inner diaphragm 6 and outer diaphragm 7 is used to reduce the relative friction between inner diaphragm 6 and outer diaphragm 7 and elastic element 2 and pipe wall when the shielding of inner diaphragm 6 and outer diaphragm 7 to bonding element 3 is removed, so that inner diaphragm 6 and outer diaphragm 7 are separated from elastic element 2;Three sections of elastic element 2 form water separation chamber 201, force chamber 202 and support chamber 203 with installation cylinder 1 respectively, inner diaphragm 6 forms drainage chamber 601 with elastic element 2, bonding element 3 is located in drainage chamber 601, water separation chamber 201, support chamber 203 and drainage chamber 601 are inflated together to expel water from the position to be repaired, force chamber 202 is used to extrude bonding element 3 to the position to be repaired of pipeline, and control mechanism is provided on air pipe 5 for controlling the flowing order of gas in air pipe 5 into water separation chamber 201, force chamber 202, support chamber 203 and drainage chamber 601.

[0033] The above setting can realize: bonding element 3 is wrapped by inner diaphragm 6 and outer diaphragm 7, which can prevent friction between bonding element 3 and pipe wall, and can also isolate accumulated water, ensure the bonding strength of bonding element 3 and pipeline, and through the expansion of elastic element 2, the water in the position to be repaired of pipeline is expelled, without cutting off the pipeline and cleaning the accumulated water, reducing the repair steps and reducing the cost.

[0034] Referring to Figures 3 to 6 The control mechanism comprises: air inlet assembly, pressure valve 13 and rear air inlet assembly, air inlet assembly is used for being communicated with air pipe 5 for water separation chamber 201, support chamber 203 and drainage chamber 601, pressure valve 13 is fixed on installation cylinder 1 and passes through installation cylinder 1, elastic element 2 and adjacent installation ring 4, to be communicated with drainage chamber 601 and outside, and rear air inlet assembly is used for being communicated with air pipe 5 for force chamber 202.

[0035] Referring to Figure 6 and Figure 8 , the front air inlet assembly comprises valve bodies 8, air guides 9, mounting shells 10, sealing members 11 and first springs 12, and the number of valve bodies 8, air guides 9, mounting shells 10, sealing members 11 and first springs 12 is three, the valve bodies 8 are fixedly connected to and communicate with the air guide pipes 5, the air guides 9 are fixedly connected to and communicate with adjacent valve bodies 8, the three air guides 9 respectively communicate with the water isolation chambers 201, the support chambers 203 and the drainage chambers 601, the circumferential side of the upper part of the air guide 9 is provided with a through slot, and the through slot of the air guide 9 is used for gas circulation; the mounting shell 10 is fixedly connected to the upper part of the adjacent air guide 9, the sealing member 11 is sealingly slid in the adjacent mounting shell 10, the sealing member 11 is used for plugging the corresponding air guide 9, the sealing member 11 is connected by a piston, a connecting rod and a disc, wherein the diameter of the disc of the sealing member 11 is greater than the inner diameter of the air guide 9, at the initial time, the disc of the sealing member 11 is not in contact with the air guide 9, and in this state, the gas can flow from the air guide pipe 5 to the through slot of the air guide 9; the first spring 12 is fixedly connected between the adjacent mounting shell 10 and the piston of the adjacent sealing member 11, the piston of the sealing member 11 is simultaneously subjected to the downward elastic force of the adjacent first spring 12 and the upward pressure in the water isolation chamber 201, the support chamber 203 or the drainage chamber 601 (the gas pressure in the mounting shell 10 is ignored); the three sealing members 11 respectively perceive the pressures in the water isolation chambers 201, the support chambers 203 and the drainage chambers 601 by the force acting on them and control the communication state of the water isolation chambers 201, the support chambers 203 and the drainage chambers 601 with the air guide pipe 5.

[0036] Referring to Figures 3 to 5 and Figure 9 , the rear air inlet assembly comprises a valve shell 14, a sealing disc 15, a second spring 16 and an elastic sheet 17, the valve shell 14 is fixedly connected to and communicates with the air guide pipe 5, the valve shell 14 communicates with the force applying chamber 202, the sealing disc 15 is located in the valve shell 14, and at the initial time, the sealing disc 15 plugs the valve shell 14; the sealing disc 15 is provided with six exhaust holes 151 which are annularly and uniformly distributed, the second spring 16 is fixedly connected between the sealing disc 15 and the valve shell 14, the elastic sheet 17 is fixedly connected to the lower side of the sealing disc 15, the elastic sheet 17 is a rubber disc with a “*”-shaped through slot in the middle part, the “*”-shaped through slot makes the middle part of the elastic sheet 17 form six fan-shaped parts, and the six fan-shaped parts of the elastic sheet 17 correspond to the six exhaust holes 151 respectively, so that the gas flows in the exhaust holes 151 in one direction downward, and the elastic sheet 17 is in contact with the valve shell 14 and is used for plugging the valve shell 14; when the gas flows from the air guide pipe 5 to the force applying chamber 202, the rear air inlet assembly plays a role of a pressure control valve, and in this state, the pressure for opening the rear air inlet assembly is greater than the pressure for opening the pressure valve 13.

[0037] Referring to Figure 1 and Figure 4The length of the part of the elastic member 2 wrapped by the inner diaphragm 6 is less than the overall length of the elastic member 2, and the right side of the inner diaphragm 6 is located in the middle of the corresponding position of the elastic member 2 and the support chamber 203, so that the right part of the corresponding position of the elastic member 2 and the support chamber 203 can directly contact the pipe wall, thereby providing support and positioning for the overall elastic member 2.

[0038] Referring to Figure 2 The outer side of the elastic member 2 and the inner side of the inner diaphragm 6 are provided with a butyl rubber layer, so that the position where the elastic member 2 and the inner diaphragm 6 contact each other can be fully attached, thereby enhancing the sealing between the elastic member 2 and the inner diaphragm 6.

[0039] The pipeline repair process is as follows: the staff winds the cling film in the middle of the elastic member 2, and then winds the adhesive member 3 soaked in resin in the middle of the elastic member 2; the inner diaphragm 6 and the outer diaphragm 7 are sleeved on the surface of the elastic member 2 and the adhesive member 3 together, and the pull rope is connected with the holes in the left part of the inner diaphragm 6 and the outer diaphragm 7; the catheter is used to communicate the air guide pipe 5 with the air pump, then the well cover upstream of the pipeline to be repaired is opened, the device is sent into the pipeline through the well mouth, and the device is moved to the position to be repaired in the pipeline by the driving of the water flow in the pipeline.

[0040] When the adhesive member 3 corresponds to the position to be repaired of the pipeline, the device is stopped from moving in the pipeline by pulling the catheter and the pull rope, at this time, the air pump is used to inject air into the air guide pipe 5, the gas in the air guide pipe 5 enters the water isolation chamber 201, the support chamber 203 and the drainage chamber 601 through the three air guides 9 respectively, so that the left and right parts of the elastic member 2, the inner diaphragm 6 and the outer diaphragm 7 expand together, and the pressure in the air guide pipe 5, the water isolation chamber 201, the support chamber 203 and the drainage chamber 601 gradually increases, wherein under the same pressure change, the outer expansion amplitude of the drainage chamber 601 is greater than that of the water isolation chamber 201 and the support chamber 203 due to the influence of the elastic force of the elastic member 2, the inner diaphragm 6 and the outer diaphragm 7, so the middle part of the outer side of the outer diaphragm 7 will first attach to the pipe wall, then the outer side of the outer diaphragm 7 will gradually attach to the pipe wall from the middle part to the left and right sides, and finally when a part of the right part of the elastic member 2 attaches to the pipe wall, the outer side of the corresponding position of the outer diaphragm 7 and the drainage chamber 601 has all attached to the pipe wall, thereby draining the accumulated water in the position to be repaired of the pipeline.

[0041] In the process of gradually increasing the pressure in the water chamber 201, support chamber 203 and drainage chamber 601, the piston of the sealing member 11 is gradually increased by the upward thrust given by the air pressure, and gradually pushes the sealing member 11 to move upwards, compresses the first spring 12, when a part of the right part of the elastic member 2 is in contact with the pipe wall, the disc of the sealing member 11 is in contact with the air guide member 9, at this time the sealing member 11 blocks the air guide member 9, so that the gas in the air guide pipe 5 cannot continue to be transported into the water chamber 201, support chamber 203 and drainage chamber 601, so as to utilize the sealing member 11 to sense the pressure in the water chamber 201, support chamber 203 and drainage chamber 601, achieve the purpose of drainage, reduce the unnecessary expansion of the elastic member 2, and further control the maximum expansion range of the elastic member 2 in the repair process, reduce the damage of the elastic member 2, and improve the number of pressure deformation.

[0042] After the sealing member 11 blocks the air guide member 9, the pressure in the air guide pipe 5 increases rapidly with the operation of the air pump, so that the staff outside can know that the outside of the outer diaphragm 7 has been in contact with the pipe wall, at this time the staff pulls the pull rope and continues to inject gas into the air guide pipe 5, the pull rope pulls the inner diaphragm 6 and the outer diaphragm 7 to move left, the length of the inner side of the inner diaphragm 6 and the outer side of the outer diaphragm 7 gradually increases, and the length of the inner side of the inner diaphragm 6 and the outer side of the outer diaphragm 7 gradually decreases, in this process, the inner side of the inner diaphragm 6 and the outer side of the outer diaphragm 7 are kept in a relatively static state by the friction given by the elastic member 2 and the pipe wall respectively, and the right side of the inner diaphragm 6 and the outer diaphragm 7 gradually moves left, the contact area between the inner diaphragm 6 and the elastic member 2 gradually decreases, the shape of the right part of the elastic member 2 changes with the movement of the right side of the inner diaphragm 6, so that the contact area between the right part of the elastic member 2 and the pipe wall gradually increases, then the inner diaphragm 6 completely loses contact with the right part of the elastic member 2 (note that at this time the drainage chamber 601 is composed of the pipe wall and the elastic member 2), and finally the inner diaphragm 6 is separated from the elastic member 2.

[0043] In the process of the staff pulling the pull rope, the pressure in the air guide pipe 5 gradually increases, and finally reaches a pressure sufficient to push the sealing disc 15 to move, so that the sealing disc 15 and the elastic sheet 17 move upwards, unblock the valve shell 14, and make the gas in the air guide pipe 5 flow into the force chamber 202, the force chamber 202 expands, and drives the adhesive member 3 to deform, so that the overlapping area of the adhesive member 3 gradually decreases, and the diameter of the cylinder gradually increases, and finally the adhesive member 3 is in contact with the pipe wall, at this time the air pump continues to inject gas, so that the pressure in the force chamber 202 continues to increase, and then the extrusion force of the elastic member 2 on the adhesive member 3 increases, until the pressure in the force chamber 202 reaches a specified value (the extrusion force of the elastic member 2 on the adhesive member 3 corresponding to the value is sufficient to make the adhesive member 3 completely in contact with the pipe wall), stop the air pump, and keep the pressure in the air guide pipe 5 unchanged (at this time the sealing disc 15 moves downwards under the elastic force of the second spring 16 and blocks the valve shell 14 again), so that after the resin is cured, the repair of the pipeline is completed.

[0044] In the process of gradually increasing the volume of the force applying chamber 202, the volume of the drainage chamber 601 gradually decreases, so that the pressure in the drainage chamber 601 increases, at this time, the gas in the drainage chamber 601 flows to the outside through the pressure valve 13, so as to keep the pressure in the drainage chamber 601 unchanged.

[0045] After the resin in the adhesive 3 is cured, the air pump is started and the gas in the air guide pipe 5 is pumped out, in this process, the air pressure in the air guide pipe 5 gives the sealing member 11 a downward pulling force, so that the sealing member 11 moves downward and unblocks the air guide member 9, so that the gas in the water isolation chamber, the supporting chamber 203 and the drainage chamber 601 gradually enters the air guide pipe 5, at the same time, the upper and lower sides of the elastic sheet 17 are affected by the pressure difference and deformed, so that the elastic sheet 17 unblocks the exhaust hole 151, at this time, the gas in the force applying chamber 202 gradually enters the air guide pipe 5, so that the shape of the elastic member 2 gradually recovers, then the staff removes the device from the pipeline through the conduit.

[0046] Embodiment 2

[0047] This embodiment is further optimized on the basis of embodiment 1.

[0048] Referring to Figure 5 , the inner diaphragm 6 and the outer diaphragm 7 are coated with talcum powder, which is used to reduce the friction when the inner diaphragm 6 and the outer diaphragm 7 deform, so that the left side of the inner diaphragm 6 and the outer diaphragm 7 can gradually deform when being pulled.

[0049] Embodiment 3

[0050] This embodiment is further optimized on the basis of embodiment 2, to improve the drainage effect and reduce the volume of water remaining between the inner diaphragm 6 and the pipe wall.

[0051] Referring to Figure 6 and Figure 7 , as the axial distance between the water isolation chamber 201 and the supporting chamber 203 increases, the wall thickness of the elastic member 2 corresponding to the water isolation chamber 201 and the supporting chamber 203 gradually increases, by limiting the wall thickness change of the left and right parts of the elastic member 2, the left and right parts of the elastic member 2 form a circular truncated cone shape when expanding, so as to form a shuttle shape together with the inner diaphragm 6 when expanding (the position corresponding to the drainage chamber 601 of the inner diaphragm 6 is a shuttle shape without a sharp end when expanding), so that the inner diaphragm 6 can gradually adhere to the pipe wall from the middle, and then squeeze out the water in the pipe, to improve the drainage effect.

[0052] Embodiment 4

[0053] This embodiment is further optimized on the basis of embodiment 3, to provide the function of facilitating the device to be put into the pipeline.

[0054] When the repairing air bag is put into the pipeline to be repaired, it is usually put into the wellhead near the position to be repaired. Since the wellhead and the pipeline to be repaired are in a vertical state, the device is set to a bendable state, so that the device is easily put into the pipeline.

[0055] Referring to Figure 4 and Figure 5 , the inner side of the mounting cylinder 1 is fixed with a plurality of support rings 18 uniformly distributed. The mounting cylinder 1 is made of elastic rubber material, and the support ring 18 is made of metal material, which is used to keep the inner diameter of the mounting cylinder 1 stable, and does not hinder the bending of the mounting cylinder 1, so that the device is easily put into the pipeline from the wellhead.

[0056] Embodiment 5

[0057] This embodiment is further optimized on the basis of embodiment 4, and provides the function of absorbing water to prevent water from contacting the adhesive 3.

[0058] Referring to Figure 2 and Figure 3 , the mounting ring 4 on the right side is fixed with a water absorption ring 19 made of sponge material. When the inner diaphragm 6 loses contact with the right part of the elastic member 2, a small amount of water stored at the position where the right side of the inner diaphragm 6 contacts the elastic member 2 is absorbed by the water absorption ring 19, thereby reducing the probability of water contacting the adhesive 3, and further reducing the influence on the adhesion strength of the adhesive 3 and the pipeline.

[0059] Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art and related fields without creative labor should belong to the scope of protection of the present application. The structures, devices and operation methods not specifically described and explained in the present application, if not specially described and limited, are implemented according to the conventional means in the art.

Claims

1. A trenchless repair air bag, characterized by, The utility model relates to a kind of water-proofing and repairing device for pipeline, including: Mounting cylinder (1), the elastic member (2) is fixedly connected, the middle part of the elastic member (2) is wound with adhesive member (3), the outer side of the elastic member (2) is fixedly connected with two mounting rings (4) distributed symmetrically, two The mounting ring (4) separates the elastic member (2) into three sections, the mounting cylinder (1) is provided with air guide pipe (5), the outer side of the elastic member (2) is wrapped with inner diaphragm (6), the outer side of the inner diaphragm (6) is wrapped with outer diaphragm (7), the inner diaphragm (6) and the outer diaphragm (7) are used for temporarily shielding the adhesive member (3) together, the elastic member (2) and the mounting cylinder (1) form water-proofing chamber (201), force chamber (202) and support chamber (203), the inner diaphragm (6) and the elastic member (2) form drainage chamber (601) together, the water-proofing chamber (201), the support chamber (203) and the drainage chamber (601) are inflated together and the water of the position to be repaired is discharged, the force chamber (202) is used to extrude the adhesive member (3) to the position to be repaired of pipeline, the air guide pipe (5) is provided with control mechanism for controlling the gas in the air guide pipe (5) to flow into the water-proofing chamber (201), the force chamber (202), the support chamber (203) and the drainage chamber (601) in sequence; The control mechanism includes: Air inlet assembly, pressure valve (13) and rear air inlet assembly, the air inlet assembly is used to communicate the water-proofing chamber (201), the support chamber (203) and the drainage chamber (601) with the air guide pipe (5), the pressure valve (13) is fixedly connected on the mounting cylinder (1) and penetrates the mounting cylinder (1), the elastic member (2) and adjacent mounting ring (4), to communicate the drainage chamber (601) with the outside, the rear air inlet assembly is used to communicate the force chamber (202) with the air guide pipe (5); The air inlet assembly includes: Valve body (8), air guide (9), mounting shell (10), sealing element (11) and first spring (12), and the number of valve body (8), air guide (9), mounting shell (10), sealing element (11) and first spring (12) is three, the valve body (8) is connected and communicated with the air guide pipe (5), the air guide (9) is connected and communicated with the adjacent valve body (8), three air guides (9) are communicated with the water separation chamber (201), the support chamber (203) and the drainage chamber (601) respectively, the mounting shell (10) is connected with the adjacent air guide (9), the sealing element (11) is sealed in the adjacent mounting shell (10), the sealing element (11) is used for blocking the corresponding air guide (9), the first spring (12) is connected between the adjacent mounting shell (10) and the adjacent sealing element (11), three sealing elements (11) respectively perceive the pressure in the water separation chamber (201), the support chamber (203) and the drainage chamber (601) by the force acting on itself and control the communication state of the water separation chamber (201), the support chamber (203) and the drainage chamber (601) with the air guide pipe (5).

2. A trenchless repair airbag according to claim 1, characterized in that The rear air inlet assembly comprises: Valve shell (14), sealing disc (15), second spring (16) and elastic sheet (17), the valve shell (14) is connected and communicated with the air guide pipe (5), the valve shell (14) is communicated with the force applying chamber (202), the sealing disc (15) is located in the valve shell (14), the sealing disc (15) is provided with an exhaust hole (151), the second spring (16) is connected between the sealing disc (15) and the valve shell (14), the elastic sheet (17) is connected to the side of the sealing disc (15) away from the second spring (16), the elastic sheet (17) is in contact with the valve shell (14) and is used for blocking the valve shell (14), the elastic sheet (17) is used for making the gas flow in the exhaust hole (151) in one direction.

3. A trenchless repair airbag according to claim 1, wherein, The outer side of the elastic element (2) and the inner side of the inner diaphragm (6) are provided with a butyl rubber layer, so that the position of the elastic element (2) in contact with the inner diaphragm (6) can be fully attached.

4. A trenchless repair airbag according to claim 1, wherein, The inner diaphragm (6) and the outer diaphragm (7) are coated with talcum powder, which is used to reduce the friction when the inner diaphragm (6) and the outer diaphragm (7) deform.

5. A trenchless repair airbag according to claim 1, wherein, The length of the part of the elastic element (2) wrapped by the inner diaphragm (6) is less than the overall length of the elastic element (2).

6. A trenchless repair airbag according to claim 1, wherein, With the increase of the axial distance between the water separation chamber (201) and the support chamber (203), the wall thickness of the corresponding position of the elastic element (2) corresponding to the water separation chamber (201) and the corresponding position of the support chamber (203) gradually increases.

7. A trenchless repair airbag according to claim 1, wherein, The inner side of the mounting cylinder (1) is fixed with a plurality of support rings (18) which are uniformly distributed, the mounting cylinder (1) is made of elastic rubber material, and the support rings (18) are used for keeping the inner diameter of the mounting cylinder (1) stable.

8. A trenchless repair airbag according to claim 1, wherein, The mounting ring (4) near the position of the support chamber (203) is fixed with a water absorption ring (19).

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