A trenchless pipe rehabilitation assisted water guide device

Abstract

The utility model relates to underground pipeline repair technical field, concretely is a kind of trenchless pipeline repair auxiliary water guide device, including blowdown pump, first L type pipeline and second L type pipeline respectively with the water inlet port and water outlet port of blowdown pump intercommunication, cross pipe respectively with the water inlet port of first L type pipeline and the water outlet port of second L type pipeline intercommunication, high-pressure gas bag respectively sleeved in the outer wall of cross pipe, double-plate check valve respectively with two cross pipe free end intercommunication, water injection mechanism with the horizontal section pipe wall intercommunication of second L type pipeline;The device is combined with high-pressure gas bag, double-plate check valve and blowdown pump, solve the problem of upstream pipeline water retention;Both avoid sewage overflow to pollute the environment, and eliminate garbage deposition caused by water retention, save the cost of downstream repair after upstream secondary dredging;Its structure by first, second L type pipeline and cross pipe are adapted to large pipe diameter operation, avoid the disadvantage of frequent operation of traditional small section plugging, also reduce the risk of gas bag being washed off by upstream water pressure.

Description

Technical Field

[0001] This utility model relates to the field of underground pipeline repair technology, specifically to an auxiliary water guiding device for trenchless pipeline repair. Background Technology

[0002] Urban drainage pipelines serve as the "lifeline" of cities, directly impacting their normal operation. Defects in these pipelines can lead to urban flooding, ground collapses, and other accidents. Trenchless pipeline repair technology is essential to ensuring the proper functioning of drainage pipelines.

[0003] In the current field of industrial pipeline dredging and repair, airbags are commonly used to seal upstream and downstream pipelines. However, this method has the following problems: First, because it is impossible to drain the water trapped in the upstream pipeline in a timely manner, sewage can easily rise and overflow onto the ground, causing serious pollution to the surrounding environment. Moreover, the long-term stagnant state of the upstream pipeline leads to the accumulation of a large amount of garbage, requiring secondary dredging of the upstream pipeline after the downstream pipeline is repaired, which undoubtedly increases the project cost. Second, when the water pressure in the upstream pipeline is too high, the airbags can easily be blown off, causing not only property damage but also safety hazards. In addition, for pipelines with small cross-sections, traditional sealing, dredging, and repair methods require frequent repetition of operations, further increasing the project cost. Utility Model Content

[0004] The purpose of this utility model is to provide a trenchless pipeline repair auxiliary water guiding device to solve the problems of existing devices, such as the inability to timely discharge upstream water, sewage overflow and environmental pollution, and increased costs due to secondary dredging; high upstream water pressure can easily cause the airbag to be blown off, resulting in property damage and safety hazards; and the need for frequent repetition of traditional operations on small cross-section pipelines, which is more costly.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a trenchless pipeline repair auxiliary water guiding device, comprising a sewage pump, a first L-shaped pipe and a second L-shaped pipe respectively connected to the inlet and outlet ports of the sewage pump, a horizontal pipe respectively connected to the inlet port of the first L-shaped pipe and the outlet port of the second L-shaped pipe, high-pressure airbags respectively sleeved on the outer wall of the horizontal pipe, double-plate check valves respectively connected to the free ends of the two horizontal pipes, and a water injection mechanism connected to the horizontal section wall of the second L-shaped pipe and located on one side of the outlet port of the sewage pump; the opening direction of the double-plate check valve is consistent with the sewage guiding direction; the high-pressure airbag has a ring structure.

[0006] Furthermore, the first L-shaped pipe, the second L-shaped pipe, and the two horizontal pipes each include at least one wire mesh skeleton conduit, an elbow and a clamp at the pipe bend, and the vertical sections of the first L-shaped pipe and the second L-shaped pipe are connected to the elbows, adjacent wire mesh skeleton conduits, and the elbows of the horizontal pipes by clamps.

[0007] Furthermore, EPDM rubber sealing gaskets are provided between the connecting surfaces of the wire mesh skeleton conduit, elbow, and clamp.

[0008] Furthermore, the water injection mechanism includes a water injection head connected to the wire mesh skeleton conduit of the horizontal section of the second L-shaped pipe, and a sealing cap provided at the water inlet end of the water injection head, wherein a silicone sealing ring is provided on the inner side of the sealing cap.

[0009] Furthermore, each of the high-pressure airbags has an inflation nozzle on its outer wall.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] In practical applications, this invention solves many problems associated with traditional airbag sealing methods in industrial pipeline dredging and repair by utilizing the coordinated operation of a sewage pump, a first L-shaped pipe, a second L-shaped pipe, a horizontal pipe, a high-pressure airbag, a double-plate check valve, and a water injection mechanism. The device employs a combined structure of a high-pressure airbag, a double-plate check valve, and a sewage pump to resolve the issue of water backflow in upstream pipelines. On one hand, it prevents sewage from overflowing due to backflow, thus eliminating pollution to the surrounding environment; on the other hand, it eliminates the sedimentation caused by backflow, saving the additional cost of secondary dredging of upstream pipelines after downstream pipeline repair. Furthermore, the structure composed of the first L-shaped pipe, the second L-shaped pipe, and the horizontal pipe is adaptable to large-diameter operation scenarios. This not only avoids the frequent operation required by traditional small-section sealing methods but also reduces the risk of the airbag being dislodged due to excessive upstream water pressure. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the trenchless pipeline repair auxiliary water guiding device of this utility model.

[0013] In the diagram: 1. First L-shaped pipe; 2. Second L-shaped pipe; 3. Sewage pump; 4. Water injection head; 5. Horizontal pipe; 6. Double-plate check valve; 7. High-pressure airbag; 8. Inflation nozzle; 9. Elbow; 10. Steel wire mesh skeleton conduit; 11. Clamp. Detailed Implementation

[0014] Please see Figure 1A trenchless pipeline repair auxiliary water guiding device includes a sewage pump 3 (a 15kW-ZW type self-priming sewage pump), a first L-shaped pipe 1 and a second L-shaped pipe 2 connected to the inlet and outlet ports of the sewage pump 3 respectively via flanges, a horizontal pipe 5 connected to the inlet port of the first L-shaped pipe 1 and the outlet port of the second L-shaped pipe 2 respectively, a high-pressure airbag 7 (a three-layer rubber two-layer cloth high-pressure airbag) sleeved on the outer wall of the horizontal pipe 5, a double-plate check valve 6 connected to the free ends of the two horizontal pipes 5 respectively, and a water injection mechanism connected to the horizontal section wall of the second L-shaped pipe 2 and located on one side of the outlet port of the sewage pump 3; the opening direction of the double-plate check valve 6 is consistent with the sewage guiding direction; the high-pressure airbag 7 has a ring structure. Rubber sealing rings with an inner diameter consistent with the inner diameter of the pipes are provided at the connection points between the inlet and outlet ports of the sewage pump 3 and the first L-shaped pipe 1 and the second L-shaped pipe 2 respectively. With its high-flow sewage discharge capacity, the sewage pump 3 can quickly drain sewage from the upstream pipes, preventing sewage overflow and garbage sedimentation caused by water stagnation. The high-pressure rubber airbag with three rubber layers and two cloth layers is connected to the outer wall of the horizontal pipe to form a ring-shaped sealing structure. After inflation, it fits tightly against the inner wall of the pipe. Combined with the one-way flow setting of the double-plate check valve 6, it not only eliminates the risk of the airbag being blown off by excessive upstream water pressure, but also prevents sewage backflow when the sewage pump 3 stops.

[0015] The first L-shaped pipe 1, the second L-shaped pipe 2, and the two horizontal pipes 5 each include at least one wire mesh reinforced conduit 10 (using DN150 steel-reinforced HDPE conduit), an elbow 9 located at the pipe bend, and a clamp 11 (using DN150 steel clamp). The vertical sections of the first L-shaped pipe 1 and the second L-shaped pipe 2 are connected to the elbow 9, adjacent wire mesh reinforced conduits 10, and the elbows 9 of the horizontal pipes 5 via clamps 11. The use of DN150 steel-reinforced HDPE conduits for the wire mesh reinforced conduits 10 combines the high strength of steel with the corrosion resistance of HDPE, resisting the erosion of acids and alkalis in sewage. The high-strength clamping force of the DN150 steel clamps 11 ensures a stable connection between adjacent wire mesh reinforced conduits 10 under high-pressure water flow impact. Furthermore, they can be flexibly spliced ​​according to the actual pipeline layout. Adjacent wire mesh reinforced conduits 10 and elbows 9 are assembled via clamps 11, making installation convenient and easy to disassemble and maintain.

[0016] The connection surfaces of the wire mesh reinforced conduit 10, elbow 9, and clamp 11 are all equipped with EPDM rubber gaskets with a thickness of 2-5mm. The EPDM rubber gaskets, through their chemical corrosion resistance and aging resistance, can resist the erosion of acidic and alkaline substances in sewage, ensuring good sealing at the connection and preventing leakage problems caused by corrosion of the sealing material.

[0017] The water injection mechanism includes a water injection head 4 connected to the wire mesh skeleton conduit 10 of the horizontal section of the second L-shaped pipe 2, and a sealing cap detachably connected to the water inlet end of the water injection head 4. The sealing cap has a silicone sealing ring on the inside. The water injection head 4 can inject clean water into the second L-shaped pipe 2 before the device is started, forming a water seal to isolate air and effectively prevent pump damage caused by cavitation when the sewage pump 3 is started. The silicone sealing ring on the inside of the sealing cap can ensure that the water injection head 4 is tightly sealed when not injecting water.

[0018] The outer wall of the high-pressure airbag 7 is equipped with an inflation nozzle 8; the inflation nozzle 8 includes a valve body and a spring check valve disc located inside the valve body, and the outer wall of the valve body is connected to a quick connector adapted to the inflation equipment. Through the quick connector adapted to the inflation equipment, the high-pressure airbag 7 can be quickly inflated and deflated.

[0019] Working process and principle: When installing this trenchless pipeline repair auxiliary water guiding device, the high-pressure airbag 7 is first fitted and connected to the outer wall of the horizontal pipe 5. The high-pressure airbag 7 is inflated through the air inlet 8 to make its outer diameter match the inner diameter of the pipe, so as to achieve the sealing and fixation of the device to the inner wall of the pipe. At the same time, the steel wire mesh skeleton conduit 10 and elbow 9 are spliced ​​together using the clamp 11 to form the first L-shaped pipe 1, the second L-shaped pipe 2 and the horizontal pipe 5. The EPDM rubber sealing gasket at the connection ensures the sealing performance. Before starting, clean water is injected into the second L-shaped pipe 2 through the water injection head 4 to form a water seal, preventing air from entering and causing cavitation when the sewage pump 3 starts. After the sewage pump 3 starts, sewage from the upstream pipe flows in through the upstream horizontal pipe 5, is sucked in by the first L-shaped pipe 1 and discharged through the second L-shaped pipe 2, and is guided to the downstream pipe through the downstream horizontal pipe 5. During this process, the double plate check valve 6 automatically opens under the water pressure to ensure unidirectional flow of sewage. When the sewage pump 3 stops, the valve plate of the double plate check valve 6 closes quickly under the action of the spring to prevent sewage backflow.

[0020] Advantages of this auxiliary water guiding device:

[0021] 1. High work efficiency: Based on one sewage pump for a 40m section of a DN1500 pipe, 180m³ of sewage can be discharged per hour. If several sections need to be operated simultaneously, only one sewage pump needs to be added at every 80m well position. This greatly shortens the sewage discharge time and buys enough time for subsequent dredging and repair. It successfully solves the outstanding problems of low work efficiency and significantly increased project costs.

[0022] 2. Cost Savings: Traditional airbag sealing of a 120m section of DN1500 pipeline requires secondary dredging of the upstream pipe and repeated dredging of the downstream pipe. The dredging volume is 3.14 * 0.75 * 0.75 * 40 + 3.14 * 0.75 * 0.75 * 40 * 0.3 = 91.845 m³, with a dredging cost of 3000 yuan * 91.845 m³ = 275535 yuan. Using a trenchless pipeline repair auxiliary water guiding device, secondary dredging of the upstream pipe is unnecessary because the water flow is normal, eliminating the risk of water stagnation and debris accumulation. Furthermore, the downstream pipe can be flushed, further reducing the dredging workload.

[0023] 3. Multifunctionality: While blocking and draining the upstream pipeline, the sewage from the upstream pipeline can also be used to flush the downstream pipeline by adding a sewage pump 3.

[0024] In summary, this device solves the problems of traditional airbag plugging by sealing, diverting, and preventing backflow: ① It avoids sewage overflow and environmental pollution caused by water backflow in upstream pipelines; ② It eliminates garbage sedimentation caused by water backflow, eliminating the additional cost of secondary dredging upstream after downstream repairs; ③ The combination structure of the high-pressure airbag 7 and the double-plate check valve 6 prevents the risk of the high-pressure airbag 7 being blown off due to excessive water pressure; ④ The first L-shaped pipe 1, the second L-shaped pipe 2, and the horizontal pipe 5 are suitable for large-diameter operations, avoiding the drawbacks of frequent operations required by traditional small-section plugging. Practice shows that this device can achieve a sewage discharge efficiency of 180 m³ / h per 40m section of DN1500 pipeline. When operating in multiple sections, adding a pump body every 80m of well position can expand the flow rate. While ensuring construction safety, it reduces the overall cost of dredging and repair by more than 60%, improving the economic benefits and operational efficiency of pipeline maintenance.

[0025] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A trenchless pipeline repair auxiliary water guiding device, characterized in that, The system includes a sewage pump (3), a first L-shaped pipe (1) and a second L-shaped pipe (2) connected to the inlet and outlet ports of the sewage pump (3) respectively, a horizontal pipe (5) connected to the inlet port of the first L-shaped pipe (1) and the outlet port of the second L-shaped pipe (2) respectively, a high-pressure airbag (7) sleeved on the outer wall of the horizontal pipe (5), a double-plate check valve (6) connected to the free ends of the two horizontal pipes (5) respectively, and a water injection mechanism connected to the horizontal section wall of the second L-shaped pipe (2) and located on one side of the outlet port of the sewage pump (3); the opening direction of the double-plate check valve (6) is consistent with the sewage diversion direction; the high-pressure airbag (7) is a ring structure.

2. The repair auxiliary water guiding device according to claim 1, characterized in that, The first L-shaped pipe (1), the second L-shaped pipe (2) and the two horizontal pipes (5) each include at least one wire mesh skeleton conduit (10), an elbow (9) and a clamp (11) at the pipe bend. The vertical sections of the first L-shaped pipe (1) and the second L-shaped pipe (2) are connected to the elbow (9), the two adjacent wire mesh skeleton conduits (10) and the elbow (9) of the horizontal pipe (5) by clamps (11).

3. The repair auxiliary water guiding device according to claim 2, characterized in that, The connection surfaces of the wire mesh skeleton conduit (10), elbow (9) and clamp (11) are all provided with EPDM rubber sealing gaskets.

4. The repair auxiliary water guiding device according to claim 2, characterized in that, The water injection mechanism includes a water injection head (4) connected to the wire mesh skeleton conduit (10) of the horizontal section of the second L-shaped pipe (2), and a sealing cap provided at the water inlet end of the water injection head (4), wherein a silicone sealing ring is provided on the inner side of the sealing cap.

5. The repair auxiliary water guiding device according to claim 1, characterized in that, Each of the high-pressure airbags (7) has an inflation nozzle (8) on its outer wall.

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