Pipeline lining repairing joint

Abstract

The utility model relates to the technical field of pipeline non-excavation repair, and discloses a pipeline lining repair joint which comprises a flange sleeve, an expansion pipe is connected to the left side of the inner wall of the flange sleeve in a sliding mode, a jacking pipe is connected to the interior of the expansion pipe in a sliding mode, and pipelines are fixedly connected to the left side and the right side of the flange sleeve through a plurality of bolts. Pressure relief grooves are formed in the inner walls of the upper sides of the flange sleeve and the pipeline on the right side, the pipeline on the left side abuts against the left side of the top pipe, the inner walls of the flange sleeve and the pipeline on the right side are wrapped with lining pipes, the expansion pipe abuts against the inner walls of the left ends of the lining pipes, and a pressure relief shell is fixedly connected to the upper portion of the flange sleeve. According to the pressure relief device, the pressure relief cover is pushed by fluid to slide upwards, the spring is pulled and lengthened, gas and liquid are discharged from the porous annular structure of the pressure relief cover, then the spring pulls the pressure relief cover to return to seal the pressure relief shell, and external gas or liquid is prevented from entering the flange sleeve and an original buried pipeline on the right side.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline trenchless repair, in particular to a pipeline lining repair joint. Background Art

[0002] The origin and development of pipe lining repair joint equipment mainly stems from the growing demand for pipeline maintenance and reinforcement. With the continuous improvement of urban infrastructure construction and the aging of pipeline systems, the problems of pipeline damage and leakage are becoming increasingly prominent, and the need for pipeline maintenance and reinforcement is becoming increasingly urgent.

[0003] Existing technologies include: thermosetting resin coating repair method is applicable to various materials, such as steel and cast iron. This method can effectively fill the damaged or corroded areas of the joints and provide better sealing and corrosion resistance. The metal lining repair method involves pipeline repair in high-pressure or high-temperature environments. The metal lining repair method can ensure the close fit and sealing between the lining and the pipeline surface. For some temporary or emergency situations, mechanical connectors and plugging objects can be used to repair pipeline joints.

[0004] When existing equipment is used to repair buried pipelines, there is a gap between the original pipeline and the flexible liner pipe. When there is a local leak in the middle of the original pipeline, groundwater enters the gap or liquid residue in the original pipeline will affect the restoration of the liner pipe. Therefore, a pipeline liner repair joint is proposed to solve the above problem. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a pipeline lining repair joint, which aims to improve the problem in the prior art that the liquid residue in the original pipeline affects the repair and restoration of the lining pipe.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a pipeline lining repair joint, comprising a flange sleeve, an expansion tube is slidably connected to the left side of the inner wall of the flange sleeve, a top pipe is slidably connected to the inside of the expansion tube, the left and right sides of the flange sleeve are fixedly connected to the pipeline by multiple bolts, the flange sleeve and the upper inner wall of the right side of the pipeline are both provided with pressure relief grooves, the left side of the pipeline abuts on the left side of the top pipe, the inner walls of the flange sleeve and the right side of the pipeline are covered with an inner liner, the expansion tube abuts on the left end inner wall of the inner liner, the upper part of the flange sleeve is fixedly connected to a pressure relief shell, the inside of the pressure relief shell is fixedly connected to a bottom plate, the middle part of the bottom plate is fixedly connected to a sliding rod, the upper end of the sliding rod is fixedly connected to a limiting block, the upper part of the bottom plate is slidably connected to a pressure relief cover, the lower part of the pressure relief cover is fixedly connected to a spring, the lower end of the spring is fixedly connected to the upper part of the bottom plate, and a sealing assembly is arranged on the left side of the top pipe, and the sealing assembly is used to prevent leakage of the medium inside the pipeline.

[0007] Furthermore, the sealing assembly comprises a sealing gasket outer layer, the sealing gasket outer layer is fixedly connected to the left side of the top pipe, the interior of the sealing gasket outer layer is wrapped with a sealing middle layer, and the sealing middle layer is fixedly connected to the sealing inner layer.

[0008] Furthermore, the left inner wall of the flange sleeve and the right outer periphery of the expansion tube are both provided with locking threads, and the diameter of the expansion tube gradually decreases from left to right.

[0009] Furthermore, the pressure relief groove is connected to the inner space of the pressure relief shell, the diameter of the expansion tube is slightly smaller than the inner diameter of the flange sleeve, and the diameter of the top tube is smaller than the inner diameter of the expansion tube.

[0010] Furthermore, a porous ring is provided at the lower portion of the pressure relief cover, and a plurality of evenly distributed holes are opened at the upper portion of the bottom plate.

[0011] Furthermore, anti-skid pads are provided on both the front and rear sides of the upper end of the pressure relief cover, and the anti-skid pads are made of rubber.

[0012] Furthermore, the outer layer of the sealing gasket is made of polytetrafluoroethylene, and the sealing middle layer is made of fluororubber.

[0013] Furthermore, the sealing inner layer is made of carbon steel.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, the pressure relief cover will be pushed upward by the fluid, the spring will be pulled and lengthened, and when the porous ring of the pressure relief cover slides out of the upper end of the pressure relief shell, the gas and liquid will be discharged. When the fluid is discharged, the internal pressure of the flange sleeve and the original buried pipeline on the right side becomes smaller, and the spring pulls the pressure relief cover back to close the pressure relief shell, preventing external gas or liquid from entering the gap between the flange sleeve and the original buried pipeline on the right side and the inner liner pipe.

[0016] 2. In the utility model, the outer layer of the sealing gasket can protect the internal structure from mechanical damage and prevent the pipeline lining from slipping, the sealing middle layer can maintain the stability of the seal, and the sealing inner layer prevents the sealing gasket from deforming and losing its function during the extrusion process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional schematic diagram of a pipeline lining repair joint proposed by the utility model;

[0018] Figure 2 This is a structural schematic diagram of a flange sleeve for a pipeline lining repair joint proposed by the utility model;

[0019] Figure 3 This is a structural schematic diagram of an expansion tube for a pipeline lining repair joint proposed by the utility model;

[0020] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0021] Figure 5 This is a structural schematic diagram of a pressure relief shell of a pipeline lining repair joint proposed by the utility model;

[0022] Figure 6 The utility model is a schematic structural diagram of a sealing inner layer of a pipeline lining repair joint.

[0023] Legend:

[0024] 1. Flange sleeve; 2. Pipeline; 3. Pressure relief shell; 4. Pressure relief cover; 5. Liner pipe; 6. Expansion pipe; 7. Top pipe; 8. Outer layer of sealing gasket; 9. Sliding rod; 10. Bottom plate; 11. Spring; 12. Limit block; 13. Sealing middle layer; 14. Sealing inner layer; 15. Pressure relief groove. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Reference Figure 1-Figure 5The utility model provides an embodiment: a pipe liner repair joint, including a flange sleeve 1, which can connect the left transition pipe 2 and the right original buried pipe 2. The left side of the inner wall of the flange sleeve 1 is slidably connected with an expansion tube 6, which is used to abut against the inner wall of the liner pipe 5. The left inner wall of the flange sleeve 1 and the right outer periphery of the expansion tube 6 are both provided with locking threads, which can prevent the liner pipe 5 from slipping when installing. The diameter of the expansion tube 6 gradually decreases from left to right, and the diameter of the expansion tube 6 is slightly smaller than the inner diameter of the flange sleeve 1. The change in the diameter of the expansion tube 6 helps to insert the expansion tube 6 into the left end of the flange sleeve 1, and the internal sliding of the expansion tube 6 It is connected with a jacking pipe 7, which can be inserted into the inside of the expansion tube 6 to expand the expansion tube 6. The diameter of the jacking pipe 7 is smaller than the inner diameter of the expansion tube 6. The left and right sides of the flange sleeve 1 are fixedly connected with the pipeline 2 by multiple bolts. The flange sleeve 1 and the upper inner wall of the original buried pipeline 2 on the right are provided with a pressure relief groove 15. The pressure relief groove 15 is used to discharge the excess liquid and gas inside the original buried pipeline 2. The pressure relief groove 15 is connected to the internal space of the pressure relief shell 3. The left pipeline 2 abuts against the left side of the jacking pipe 7. The left transition pipeline 2 can prevent the jacking pipe 7 from slipping off from the inside of the expansion tube 6. The inner wall of the flange sleeve 1 and the original buried pipeline 2 on the right is covered with an inner liner pipe 5. The personnel use tools to drag the liner pipe 5 into the flange sleeve 1 and the original buried pipeline 2 on the right side, and make the liner pipe 5 fit the inner wall of the flange sleeve 1 and the original buried pipeline 2 on the right side. The liner pipe 5 is used to repair the damaged original buried pipeline 2. The expansion tube 6 abuts against the inner wall of the left end of the liner pipe 5. The upper part of the flange sleeve 1 is fixedly connected with a pressure relief shell 3, and the pressure relief shell 3 can protect the internal structure from external interference. The interior of the pressure relief shell 3 is fixedly connected with a bottom plate 10, and the bottom plate 10 is used to fix the sliding rod 9. A plurality of evenly distributed holes are opened on the upper part of the bottom plate 10. The middle part of the bottom plate 10 is fixedly connected with a sliding rod 9, and the sliding rod 9 can limit the sliding of the pressure relief cover 4. The upper end of the slide bar 9 is fixedly connected with a limit block 12, which can prevent the pressure relief cover 4 from slipping off the periphery of the slide bar 9. The upper part of the bottom plate 10 is slidably connected with the pressure relief cover 4, and the lower part of the pressure relief cover 4 is provided with a porous ring, which provides a passage for pressurized fluid. Anti-skid pads are provided on both the front and rear sides of the upper end of the pressure relief cover 4. The anti-skid pads are made of rubber, which can play an anti-skid role. The lower part of the pressure relief cover 4 is fixedly connected with a spring 11, which can pull the pressure relief cover 4 back to its original position. The lower end of the spring 11 is fixedly connected to the upper part of the bottom plate 10, and a sealing assembly is provided on the left side of the top pipe 7. The sealing assembly is used to prevent leakage of the internal medium of the pipeline 2.

[0027] Reference Figure 1 , Figure 3 and Figure 6The sealing assembly includes a sealing gasket outer layer 8. The main function of the sealing gasket outer layer 8 is to withstand mechanical friction and wear from the external environment. The sealing gasket outer layer 8 is made of polytetrafluoroethylene, which has excellent wear resistance and friction resistance. The sealing gasket outer layer 8 is fixedly connected to the left side of the top pipe 7. The interior of the sealing gasket outer layer 8 is wrapped with a sealing middle layer 13. The sealing middle layer 13 is used to maintain the stability of the seal. The sealing middle layer 13 is made of fluororubber, which has excellent elasticity and chemical resistance. The sealing middle layer 13 is fixedly connected with a sealing inner layer 14, which is used to provide structural support and stability. The sealing inner layer 14 is made of carbon steel, which has strong structural toughness and strength, and can prevent the overall deformation of the sealing gasket.

[0028] Working principle: Use multiple bolts to install the flange sleeve 1 on the left side of the original buried pipeline 2 to be repaired on the right side. When the liner pipe 5 passes through the original buried pipeline 2 on the right side and the interior of the flange sleeve 1, slide the expansion tube 6 against the inner wall of the left end of the liner pipe 5, and then slide the expansion tube 6 into the left inner wall of the flange sleeve 1, insert the jacking pipe 7 into the expansion tube 6, and then use multiple bolts to install the transition pipe 2 on the left side of the flange sleeve 1. In this process, the transition pipe 2 on the left side will squeeze the jacking pipe 7 and the expansion tube 6 to abut and press the liner pipe 5 against the left inner wall of the flange sleeve 1, and then inflate the liner pipe 5 to expand the liner pipe 5. In this process, the internal space of the original buried pipeline 2 on the right side will gradually be occupied by the liner pipe 5, and the air pressure in the original buried pipeline 2 on the right side will increase. The gas will enter the interior of the pressure relief shell 3 along the flange sleeve 1 and the pressure relief groove 15 on the inner wall of the original buried pipeline 2 on the right side. As the fluid pressure increases, the pressure relief cover 4 will be pushed upward by the gas to slide, and the spring 11 will be pulled and lengthened. When the porous ring of the pressure relief cover 4 slides out of the upper end of the pressure relief shell 3, the gas will be discharged. Similarly, if there is liquid inside the original buried pipeline 2 on the right, it will also be discharged. When the gas is discharged, the internal pressure of the flange sleeve 1 and the original buried pipeline 2 on the right side becomes smaller, and the spring 11 pulls the pressure relief cover 4 back to close the pressure relief shell 3 to prevent external gas or liquid from entering the flange sleeve 1 and the gap 5 between the original buried pipeline 2 on the right side and the inner liner pipe. In order to ensure the sealing of the connection, a three-layer structure is nested to achieve the above effect. The outer layer 8 of the sealing gasket mainly withstands mechanical friction and wear from the external environment. At the same time, the outer layer 8 of the sealing gasket has good anti-slip properties. The sealing middle layer 13 is used to maintain the stability of the seal. The sealing inner layer 14 is used to provide structural support and stability to prevent the sealing gasket from deforming and losing its function during the extrusion process.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipe lining repair joint, comprising a flange sleeve (1), characterized in that: The left side of the inner wall of the flange sleeve (1) is slidably connected to an expansion tube (6), and the inside of the expansion tube (6) is slidably connected to a top tube (7). The left and right sides of the flange sleeve (1) are fixedly connected to the pipeline (2) by multiple bolts. The upper inner walls of the flange sleeve (1) and the right side pipeline (2) are provided with pressure relief grooves (15). The left side pipeline (2) abuts against the left side of the top tube (7). The inner walls of the flange sleeve (1) and the right side pipeline (2) are covered with an inner liner (5). The expansion tube (6) abuts against the left end inner wall of the inner liner (5). 1) is fixedly connected to the upper part of a pressure relief shell (3), the interior of the pressure relief shell (3) is fixedly connected to a bottom plate (10), the middle part of the bottom plate (10) is fixedly connected to a slide rod (9), the upper end of the slide rod (9) is fixedly connected to a limit block (12), the upper part of the bottom plate (10) is slidably connected to a pressure relief cover (4), the lower part of the pressure relief cover (4) is fixedly connected to a spring (11), the lower end of the spring (11) is fixedly connected to the upper part of the bottom plate (10), and a sealing component is arranged on the left side of the top pipe (7), and the sealing component is used to prevent leakage of the internal medium of the pipeline (2).

2. A pipe lining repair joint according to claim 1, characterized in that: The sealing assembly comprises a sealing gasket outer layer (8), wherein the sealing gasket outer layer (8) is fixedly connected to the left side of the top pipe (7), the sealing gasket outer layer (8) is wrapped with a sealing middle layer (13) inside, and the sealing middle layer (13) is fixedly connected with a sealing inner layer (14).

3. The pipe lining repair joint according to claim 1, characterized in that: The left inner wall of the flange sleeve (1) and the right outer periphery of the expansion tube (6) are both provided with locking threads, and the diameter of the expansion tube (6) gradually decreases from left to right.

4. The pipe lining repair joint according to claim 1, characterized in that: The pressure relief groove (15) is connected to the internal space of the pressure relief shell (3); the diameter of the expansion tube (6) is slightly smaller than the inner diameter of the flange sleeve (1); and the diameter of the top tube (7) is smaller than the inner diameter of the expansion tube (6).

5. The pipe lining repair joint according to claim 1, characterized in that: The lower part of the pressure relief cover (4) is provided with a porous ring, and the upper part of the bottom plate (10) is provided with a plurality of evenly distributed holes.

6. The pipe lining repair joint according to claim 1, characterized in that: Anti-skid pads are provided on both the front and rear sides of the upper end of the pressure relief cover (4), and the anti-skid pads are made of rubber.

7. The pipeline lining repair joint according to claim 2, characterized in that: The outer layer (8) of the sealing gasket is made of polytetrafluoroethylene, and the middle sealing layer (13) is made of fluororubber.

8. The pipeline lining repair joint according to claim 2, characterized in that: The sealing inner layer (14) is made of carbon steel.

Images