Conduit end plugging structure in pipeline trenchless repair

Abstract

The utility model discloses a pipe end plugging structure in non-excavation repair of a pipeline, which comprises a plugging flow guide body which is vertical to the pipeline and plugged between the end of a middle pipe and the pipeline and a masonry wall on the plugging flow guide body, the plugging flow guide body comprises a semicircular cake-shaped steel plate groove and a flow guide cylinder which vertically penetrates through the semicircular cake-shaped steel plate groove, a flange plate and bolt holes annularly arrayed in the flange plate are arranged on the outer side face of the guide cylinder, the flange plate is connected with a cylinder sealing plate in a sealed mode through a sealing gasket and flange bolts penetrating through the bolt holes, and the semicircular cake-shaped steel plate grooves are filled with plain concrete. The device is not affected by water flow scouring, the construction efficiency can be improved, the construction quality can be improved, and the construction period can be shortened.

Description

Technical Field

[0001] This utility model relates to the field of trenchless pipeline repair construction, and in particular to a pipe end sealing structure for trenchless pipeline repair. Background Technology

[0002] In trenchless pipeline repair, water flow within the pipeline needs to be diverted through the installation of a conduit to create a dry environment for repair. The conduit is composed of multiple pipe sections connected section by section using flange bolts within the main pipeline, and supports are installed to ensure its coaxial arrangement with the main pipeline. After the conduit is laid, the gaps between the ends of the conduit and the main pipeline need to be sealed to cut off the water flow in the section of the pipeline to be repaired. Existing sealing structures use materials such as bricks, cement, and clay to build a sealing wall. Construction takes place during low-peak flow periods when the water flow within the pipeline is relatively small, but it is still an underwater operation. During the construction process, water accumulates as the construction height increases, eroding the construction materials. This results in a significant amount of cementitious material being washed into the downstream pipeline, affecting the sealing quality. Furthermore, this method is time-consuming, inefficient, and difficult to implement underwater. Utility Model Content

[0003] The purpose of this utility model is to provide a pipe end sealing structure for trenchless pipeline repair, so as to solve the problems of difficult construction, easy erosion of construction materials, long construction period and poor construction quality when constructing the pipe end sealing structure in water.

[0004] To address the aforementioned technical problems, this utility model provides a pipe end sealing structure for trenchless pipeline repair, comprising a sealing guide fluid perpendicular to the pipe end and between the pipe and the pipe, and a masonry wall above it. The sealing guide fluid includes a semi-circular disc-shaped steel plate groove, and a guide cylinder perpendicularly penetrating the semi-circular disc-shaped steel plate groove. The outer side of the guide cylinder is provided with a flange and an annular array of bolt holes. The flange is sealed and connected to a sealing plate through a sealing gasket and flange bolts passing through the bolt holes. The semi-circular disc-shaped steel plate groove is filled with plain concrete.

[0005] Furthermore, in the trenchless pipeline repair structure provided by this utility model, the sealing fluid also includes a rubber pad disposed on the arc-shaped surface of the semi-circular disc-shaped steel plate groove.

[0006] Furthermore, the pipe end sealing structure for trenchless pipe repair provided by this utility model includes two lifting lugs pre-embedded in plain concrete and exposed on the upper surface of the semi-circular disc-shaped steel plate groove.

[0007] Furthermore, in the trenchless pipeline repair structure provided by this utility model, the sealing fluid extends upward from the inner surface of the lower chord of the pipeline.

[0008] Furthermore, in the trenchless pipeline repair structure provided by this utility model, the semi-circular disc-shaped sealing fluid extends upward from the inner surface of the lower chord of the pipeline to the outer surface of the lower chord of the middle conduit.

[0009] Furthermore, in the trenchless pipeline repair structure provided by this utility model, the guide tubes are two evenly distributed components.

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

[0011] This utility model provides a trenchless pipeline repair method for sealing the ends of conduits. During underwater construction of the pipeline, a sealing guide without a sealing plate is lowered via a hoisting manhole to the ends of the conduit to cut off the water flow below. A guide tube above it drains the water. Plain concrete filled in a semi-circular steel plate groove increases the weight of the sealing guide, preventing displacement due to water flow and ensuring its stability. When constructing a masonry wall above the sealing guide, low-peak water flow is drained through the conduit and guide tube, preventing erosion of the masonry wall above it. This method minimizes material loss and saves material. After the masonry wall is constructed, the sealing plate is installed on the guide tube flange using flange bolts and a gasket, forming the conduit end sealing structure. This ensures efficient and high-quality construction, shortening the construction period. The sealing gasket ensures a tight seal between the sealing plate and the flange of the guide tube, preventing leakage. The end-sealing structure of the central guide tube cuts off the water flow at the bottom of the central guide tube, allowing all the water in the pipeline to be temporarily discharged through the central guide tube. This creates a dry environment for the pipeline to be repaired through the end-sealing structures at both ends of the central guide tube, enabling trenchless pipeline repair by constructing the inner lining and grouting behind the wall while ensuring normal pipeline operation. This method avoids the problems of traditional methods where bricks, cement, clay, etc., are used to build walls directly on the inner surface of the pipeline from the sine wave upwards. These problems are caused by water erosion and accumulation at the bottom of the central guide tube, resulting in difficult wall construction, waste of building materials, long construction period, and poor construction quality. This method has the advantages of high construction efficiency, short construction period, low construction difficulty, and no erosion of building materials. Attached Figure Description

[0012] Figures 1 to 2 A three-dimensional structural diagram of the blockage fluid conduit;

[0013] Figure 3 This is a three-dimensional structural diagram of a sealing and guiding fluid without the sealing plate installed;

[0014] Figure 4 This is a three-dimensional cross-sectional view of the end-sealing structure of the conduit.

[0015] Figure 5 This is a side view schematic diagram of the sealing structure at the end of the catheter.

[0016] Figure 6 This is a schematic diagram of the cross-sectional structure of the tube end sealing structure;

[0017] As shown in the figure:

[0018] 1. End sealing structure of the conduit; 100. Sealing fluid guide; 101. Semi-circular disc-shaped steel plate groove; 102. Flow guide tube; 103. Flange; 104. Bolt hole; 105. Sealing gasket; 106. Flange bolt; 107. Sealing plate; 108. Plain concrete; 109. Rubber gasket; 110. Lifting lug; 200. Masonry wall; 300. Sealing plate;

[0019] 2. Pipelines;

[0020] 3. Middle catheter;

[0021] 4. Bracket;

[0022] 5. Dry storage section;

[0023] 6. Horse Riding Well. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0025] Please refer to Figures 1 to 4 and Figure 6 This utility model provides a pipe end sealing structure 1 for trenchless pipeline repair, including a sealing guide 100 perpendicular to the pipe 2, sealing the end of the intermediate guide 3 between the pipe 2 and the pipe 2, and a masonry wall 200 thereon. The sealing guide 100 includes a semi-circular disc-shaped steel plate groove 101, and a guide cylinder 102 perpendicularly penetrating the semi-circular disc-shaped steel plate groove 101. The outer side of the guide cylinder 102 is provided with a flange 103 and a ring array of bolt holes 104 thereon. The flange 103 is sealed and connected to a sealing plate 107 through the bolt holes 104 by a sealing gasket 105 and flange bolts 106. The semi-circular disc-shaped steel plate groove 101 is filled with plain concrete 108. The semi-circular disc-shaped steel plate groove 101 is welded from steel components, and the sealing plate 107 is a steel plate.

[0026] Please refer to Figures 1 to 6This utility model embodiment also provides a construction method for the conduit end sealing structure 1 in trenchless pipeline repair, including:

[0027] Step 401: Create the sealing guide fluid 100 according to the cross-sectional dimensions of the pipe 2 to be extended and the middle guide 3.

[0028] Step 402: The sealing fluid 100 without the sealing plate 107 is hoisted and lowered to the ends of both ends of the middle guide tube 3 through the saddle shaft 6, cutting off the water flow at the bottom of the middle guide tube 3, and draining water through the guide tube 102 of the sealing fluid 100.

[0029] Step 403: Construct a masonry wall 200 on the sealing and guiding fluid 100, and weld a sealing plate 300 covering the surface of the masonry wall 200 on its water-facing side. The sealing plate 300 is made of steel plate. To ensure reliable connection of the sealing plate 300, it can be welded to the sealing and guiding fluid 100. Alternatively, steel components can be pre-embedded within the masonry wall 200 and welded to the sealing plate 300.

[0030] Step 404: The sealing plate 107 is sealed and connected to the flange 103 of the guide tube 102 through the sealing gasket 105 and flange bolts 106 to form the middle guide tube end sealing structure 1. The water flow in the pipe 2 is cut off through the middle guide tube end sealing structure 1 and the water is temporarily drained through the middle guide tube 3.

[0031] The trenchless pipeline repair method provided in this embodiment utilizes a conduit end sealing structure 1 and its construction method. During underwater construction of the pipeline 2 to be repaired, the sealing conduit 100 (without the sealing plate 107) is lowered via a manhole 6 to the ends of the central conduit 3 to cut off the water flow at the bottom of the central conduit 3. The upper conduit's guide cylinder 102 drains the water. Plain concrete 108 filled in a semi-circular steel plate groove 101 increases the weight of the sealing conduit 100, preventing displacement of the sealing conduit 100 due to the flow dynamics of the water within the pipeline 2, thus ensuring the sealing conduit 100 remains in place. 0. Stability in the installation position; When constructing the masonry wall 200 on the sealing guide 100, the low-peak flow of water in the pipe 2 is drained through the middle guide 3 and the guide cylinder 102, and the masonry wall 200 above the sealing guide 100 will not be washed away by the water flow in the pipe 2, which has the advantages of low material loss and material saving; After the masonry wall 200 is constructed, the sealing plate 107 is installed on the flange 103 of the guide cylinder 102 through flange bolts 106 and sealing gasket 105 to form the middle guide end sealing structure 1, thereby ensuring the construction efficiency and construction quality of the middle guide end sealing structure 1 and shortening the construction cycle. The sealing gasket 105 ensures a sealed connection between the sealing plate 107 and the flange 103 of the guide tube 102, preventing water leakage. The water flow at the lower part of the middle guide tube 3 is cut off by the end sealing structure 1 of the middle guide tube 3, allowing all the water in the pipe 2 to be temporarily discharged through the middle guide tube 3. This creates a dry environment for the pipe 2 to be repaired through the end sealing structures 1 at both ends of the middle guide tube 3. This allows for trenchless repair of the pipe 2 while ensuring its normal operation. This method avoids the problems of traditional methods where bricks, cement, clay, and other materials are used to build the wall 200 on the inner surface of the pipe 2 from the sine wave upwards. These problems are caused by water scouring and accumulation at the lower part of the middle guide tube 3, resulting in difficult construction, waste of materials, long construction period, and poor construction quality. This method has the advantages of high construction efficiency, short construction period, low construction difficulty, and no scouring of materials.

[0032] Please refer to Figure 5 The construction method of the conduit end sealing structure 1 in trenchless pipeline repair provided by this utility model involves welding a sealing plate 300 covering the surface of the masonry wall 200 on the water-facing side, which can prevent the masonry wall 200 from being eroded by water flow and improve the service life of the masonry wall 200.

[0033] Please refer to Figure 1 , Figure 2 and Figure 4To prevent leakage between the sealing fluid guide 100 and the pipeline 200, the pipeline end sealing structure 1 and its construction method provided in this embodiment of the utility model for trenchless pipeline repair include a rubber pad 109 disposed on the arc-shaped surface of the semi-circular disc-shaped steel plate groove 101. The rubber pad 109 achieves a seal between the two, preventing water leakage.

[0034] Please refer to Figures 1 to 2 To facilitate the hoisting of the sealing conduit 100, this utility model embodiment provides a conduit end sealing structure 1 and its construction method for trenchless pipeline repair. The sealing conduit 100 further includes two lifting lugs 110 embedded in plain concrete 108 and exposed on the upper surface of the semi-circular disc-shaped steel plate groove 101. The two lifting lugs 110 facilitate connection with hoisting equipment such as truck cranes, ensure balanced lifting, and guarantee the safety of the hoisting process.

[0035] Please refer to Figures 4 to 5 To ensure the effectiveness of the sealing fluid 100 in cutting off the water flow at the lower part of the conduit 3, the present invention provides a conduit end sealing structure 1 and its construction method for trenchless pipeline repair. The sealing fluid 100 extends upwards from the inner surface of the lower chord of the pipe 2. To ensure the stability of the sealing fluid 100, its upper end face can extend to the outer surface of the lower chord of the conduit 3. This allows the upper end face of the sealing fluid 100 to fit against the flange of the conduit 3, improving the stability of the sealing fluid 100.

[0036] Please refer to Figures 1 to 4 To ensure the smooth discharge of water from pipe 2 after the installation of the sealing and guiding fluid 100, and to prevent water from accumulating above the upper surface of the sealing and guiding fluid 100, the present invention provides a trenchless pipe repair method with a conduit end sealing structure 1 and its construction method. The guiding fluid 102 consists of two evenly distributed tubes. The two guiding fluid 102 increase the flow rate of water in pipe 2, preventing water from accumulating upwards when it cannot be discharged in time, thus avoiding interference with the construction of the upper masonry wall 200.

[0037] This utility model embodiment also provides a trenchless pipeline repair method, which may include:

[0038] Step 501: Construct the conduit end sealing structure 1 using the above-mentioned construction method for trenchless pipeline repair.

[0039] Step 502: Remove residual water from the pipe 2 between the end sealing structures 1 of the middle conduit 3 to create a dry environment in the pipe 2 to be repaired. The middle conduit 3 is supported inside the pipe 2 by a bracket.

[0040] Step 503: Weld several pipe segments inside the pipe 2 to be repaired to form an inner liner pipe that is coaxial with the pipe 2.

[0041] Step 504: Grouting is performed between the inner lining pipe and the pipe 2 to be repaired, so that the pipe 2 and the inner lining pipe can be integrated through the grouting process.

[0042] Step 505: Remove the sealing structure 1 at the end of the conduit. The removal method is the reverse of the installation method. That is, the removal sequence is: sealing cylinder plate 107 and its related components that seal the fluid guide 100 - sealing wall plate 300 - masonry wall 200 - remaining components that seal the fluid guide 100.

[0043] Step 506: Remove the central conduit 3 and restore the drainage of pipe 2.

[0044] The trenchless pipeline repair method provided in this embodiment of the utility model, through the end sealing structure 1 of the middle guide tube 3 set at both ends, can be quickly disassembled and assembled, can ensure the construction of the inner lining pipe in a dry environment between the pipelines 2 to be repaired, and improve the repair efficiency of the pipelines 2.

[0045] This utility model is not limited to the specific embodiments described above. Obviously, the embodiments described above are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art are within the scope of protection of this utility model. Those skilled in the art can make other levels of modifications and variations to this utility model. Therefore, if these modifications and variations of this utility model fall within the scope of the claims of this utility model, this utility model also intends to include these modifications and variations.

Claims

1. A pipe trenchless repair catheter tip sealing structure, characterized by, The invention relates to a sealing flow guide which is perpendicular to the pipeline and is sealed between the end of the intermediate conduit and the pipeline, and the masonry wall body thereon, the sealing flow guide comprises a semicircular pie-shaped steel plate groove, a flow guide cylinder vertically penetrating in the semicircular pie-shaped steel plate groove, the outer side of the flow guide cylinder is provided with a flange plate and an annular array of bolt holes thereon, the flange plate is sealed and connected with a sealing cylinder plate through the bolt holes by flange bolts through a sealing gasket, and the semicircular pie-shaped steel plate groove is filled with concrete.

2. The pipe trenchless repair intermediate conduit end closure structure of claim 1, wherein, The sealing flow guide further comprises a rubber pad arranged on the arc surface of the semicircular pie-shaped steel plate groove.

3. The pipe trenchless repair intermediate conduit end closure structure of claim 1, wherein, The sealing flow guide further comprises two lifting lugs which are embedded in the concrete and exposed on the upper surface of the semicircular pie-shaped steel plate groove.

4. The pipe trenchless repair intermediate conduit end closure structure of claim 1, wherein, The sealing flow guide extends upward from the lower chord inner surface of the pipeline.

5. The pipe trenchless repair intermediate conduit end closure structure of claim 4, wherein, The sealing flow guide extends upward from the lower chord inner surface of the pipeline to the lower chord outer surface of the intermediate conduit.

6. The pipe trenchless repair intermediate conduit end closure structure of claim 1, wherein, The flow guide cylinder is two.

7. The pipe trenchless repair intermediate conduit end closure structure of claim 1, wherein, The sealing wall plate is welded on the water-facing surface of the masonry wall body.

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