Port sealing structure of trenchless repair system for water supply pipeline

Abstract

The utility model discloses a port sealing structure of a trenchless repair system for a water supply pipeline, which includes a municipal pipeline body to be repaired; a glass fiber repair pipeline structure layer and a PE material repair pipeline structure layer arranged on the inner wall of the municipal pipeline body; an epoxy resin structure layer is arranged on the outer port sealing structure section with a clean inner wall; a rubber belt is arranged at an adjacent position between the outer port sealing structure section of the municipal pipeline body and the inner port sealing structure section of the inner repair working layer, the rubber belt having a first structure section attached to the inner wall of the outer port sealing structure section, a third structure section attached to the inner wall of the inner port sealing structure section, and a second variable diameter structure section arranged between the first structure section and the third structure section; a plurality of stainless steel expansion rings are arranged on the inner ring of the rubber belt. The municipal pipeline port adopting the binary solidification full-structure trenchless repair structure adopts a sealing structure of a sealing ring + a stainless steel expansion ring, which effectively avoids the problem of water flowing into the interlayer during the municipal water supply process.

Description

Technical Field

[0001] The utility model relates to the technical field of municipal water supply pipelines, in particular to a port sealing structure of a non-excavation repair system for a water supply pipeline. Background Art

[0002] Municipal water supply pipelines are old and pose safety risks. In order to ensure normal water supply in the surrounding area, the original DN1000 pipelines usually need to be replaced or repaired. Since the section where the pipeline is located is a trunk road section, excavation and replacement will have a great impact on the surrounding traffic and environment, so it is imperative to use non-excavation repair methods to update the pipeline.

[0003] The most common dual-solidification full-structure trenchless repair process currently includes the following steps:

[0004] (1) UV curing - structural layer dragging and ultraviolet light curing: using ultraviolet light to quickly cure the glass fiber tube to form a structural support layer on the inner wall of the original pipe.

[0005] (2) PE impregnation and storage and transportation - Epoxy resin impregnation: Pour epoxy resin glue into the repair lining, and then connect one end to the flipping machine to flip the repair lining over so that the glue side sticks to the wall of the fiberglass pipe. Then, hot water or steam is used to heat the pipe. The epoxy resin begins to solidify as the temperature rises, thereby forming a new inner wall.

[0006] After the above-mentioned structural repair layer is formed, it is necessary to prevent water supply from flowing in the interlayer formed between the original pipe and the repair layer. In order to ensure that the water supply flows in the channel within the repair structure, the port sealing structure is the key to ensuring the sealing effect. Utility Model Content

[0007] The utility model aims to solve the above technical problems and provides a port sealing structure of a trenchless repair system for a water supply pipeline with good sealing.

[0008] In order to solve the above technical problems, the embodiment of the utility model provides a port sealing structure of a water supply pipeline trenchless repair system, which includes:

[0009] The municipal pipeline to be repaired;

[0010] A glass fiber repair pipe structure layer arranged on the inner wall of the municipal pipe body;

[0011] A PE material repair pipe structure layer provided on the inner wall of the glass fiber repair pipe structure layer;

[0012] The glass fiber repair pipe structure layer and the PE material repair pipe structure layer together form an inner repair working layer. Both ends of the municipal pipeline body are provided with an outer port sealing structure section without an inner repair working layer. The length of the port sealing structure section is Lcm;

[0013] The outer port sealing structure section with a clean inner wall is provided with an epoxy resin structure layer, and the epoxy resin structure layer extends to the inner port sealing structure section of the inner repair working layer, and the end of the inner repair working layer is an oblique cone structure;

[0014] A rubber belt is provided at an adjacent position of the outer port sealing structure section of the municipal pipeline body and the inner port sealing structure section of the inner repair working layer, the rubber belt having a first structure section attached to the inner wall of the outer port sealing structure section, a third structure section attached to the inner wall of the inner port sealing structure section, and a second diameter-changing structure section provided between the first structure section and the third structure section, the outer side surface of the first structure section is provided with at least two circumferentially arranged first outer convex ribs, and the outer side surface of the third structure section is provided with at least two circumferentially arranged third outer convex ribs;

[0015] The inner ring of the rubber belt is provided with multiple stainless steel expansion rings.

[0016] Furthermore, a cushion membrane is provided between the glass fiber repair pipe structure layer and the municipal pipe body.

[0017] Furthermore, the stainless steel expansion ring comprises a non-closed stainless steel ring body, the open end of the stainless steel ring body is provided with a C-shaped butt end, and a tightening block is provided between the two C-shaped butt ends.

[0018] Furthermore, the rubber belt sleeve between the two circumferentially arranged first outer rib strips is provided with a carbon fiber ring with a rubber layer on the surface;

[0019] The rubber belt sleeve between the two third outer convex ribs is provided with a carbon fiber ring with a rubber layer on the surface.

[0020] Furthermore, the water-facing surface of the stainless steel expansion ring adopts an arc-shaped flow-guiding structure.

[0021] Furthermore, the rubber ring contact surface of the stainless steel expansion ring is provided with a serrated structure to improve the gripping effect between them.

[0022] Furthermore, a constraint structure and a positioning structure are provided between the ring body of the stainless steel expansion ring and the expansion block. The mutual constraint structures, for example, a C-shaped butt joint is arranged at the open end of the stainless steel expansion ring, and an expansion block with an arc-shaped end is installed between the two C-shaped butt joints. Further, an inner recess is provided at the C-shaped butt joint, and the expansion block is provided with a protrusion that cooperates with the inner recess. This not only enhances the mutual constraint effect, but also plays a good positioning role, which is convenient for squeezing the expansion block into place for operational stability.

[0023] The utility model has the following beneficial effects: the municipal pipeline port adopts a binary solidification full-structure trenchless repair structure, which adopts a sealing structure of a sealing ring + a stainless steel expansion ring, effectively avoiding the problem of water flowing into the interlayer during the municipal water supply process, and improving the quality stability and reliability of the repair structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the port sealing structure of the trenchless repair system for water supply pipes.

[0025] Figure 2 This is a schematic diagram of the stainless steel expansion ring structure.

[0026] Figure 3 for Figure 2 Enlarged view of point I in the middle.

[0027] Figure 4 It is a cross-sectional view of a stainless steel expansion ring in another embodiment. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments.

[0029] The embodiment of the utility model provides a port sealing structure of a trenchless repair system for a water supply pipeline, see Figure 1 , which includes a municipal pipeline body 1 to be repaired, and the municipal pipeline is a water supply pipeline. During the repair process, a glass fiber repair pipeline structure layer is provided on the inner wall of the municipal pipeline body, and a PE material repair pipeline structure layer is also provided on the inner wall of the glass fiber repair pipeline structure layer. The glass fiber repair pipeline structure layer and the PE material repair structure pipeline structure layer together form an inner repair working layer 2. The above repair structure is a prior art and will not be described in detail here.

[0030] Continue to see Figure 1, both ends of the municipal pipeline body 1 are provided with an outer port sealing structure section K1 without an inner layer repair working layer, the length of the port sealing structure section is Lcm, and the value of L is 10-30cm, the outer port sealing structure section with a clean inner wall is provided with an epoxy resin structure layer 3, and the epoxy resin structure layer extends to the inner port sealing structure section K2 of the inner layer repair working layer 2, and the end of the inner layer repair working layer is an oblique cone structure. A rubber belt 4 is provided at the adjacent position of the outer port sealing structure section K1 of the municipal pipeline body 1 and the inner port sealing structure section K2 of the inner layer repair working layer 2, and the rubber belt has a first structure section 4a attached to the inner wall of the outer port sealing structure section K1, a third structure section 4c attached to the inner wall of the inner port sealing structure section K2, and a second variable diameter structure section 4b arranged between the first structure section and the third structure section, the outer side surface of the first structure section is provided with at least two circumferentially arranged first outer convex ribs 4a-1, and the outer side surface of the third structure section is provided with at least two circumferentially arranged third outer convex ribs 4c-1. A single rubber strip cannot play an effective role. The inner ring of the rubber belt is provided with multiple stainless steel expansion rings 5, such as the three shown in the figure, which are stainless steel expansion ring No. 1 ①, stainless steel expansion ring No. 2 ②, and stainless steel expansion ring No. 3 ③.

[0031] It should be pointed out that a cushion membrane can be set between the glass fiber repair pipe structure layer and the municipal pipe body, which can play an effective protective effect on the repair structure.

[0032] See also Figure 2-3 As shown, the stainless steel expansion ring includes a non-closed stainless steel ring body 5a, and the open end of the stainless steel ring body is provided with a C-shaped docking end 5b. The C-shaped docking end here can effectively constrain the internal expansion structure to avoid the risk of disengagement due to the relative distribution of the two C-shaped docking ends, and a tightening block 5c is provided between the two C-shaped docking ends. This wrapping structure can improve the stability of the structure. The arc-shaped inner groove surface of the C-shaped docking end can be provided with a V-shaped inner groove, and although the expansion block has two arc-shaped end surfaces adapted to the C-shaped groove of the C-shaped docking end, the arc-shaped end surface of the expansion block is adapted to the V-shaped protrusion of the V-shaped docking groove, which can achieve a good secondary precise positioning effect and further improve the operational stability of the expansion block during the expansion process.

[0033] Taking into account the structural strength of the rubber belt after the fastening structure is installed, the rubber belt sleeve between the two circumferentially arranged first outer ribs is provided with a carbon fiber ring with a rubber layer on the surface. Similarly, the rubber belt sleeve between the two third outer ribs 4c-1 is provided with a carbon fiber ring with a rubber layer on the surface. The carbon fiber ring with a rubber layer on the surface can fill the gap between the two ribs to avoid pulling of the rubber ring. In addition, the rubber layer of the carbon fiber ring can be used to cling to the inner wall of the pipe for a second time to further improve the sealing effect.

[0034] As another example, see Figure 4The water-facing surface of the stainless steel expansion ring 5 adopts an arc-shaped flow-guiding structure 5-1, which can reduce the impact of water flow on the ring body to a certain extent. The surface of the stainless steel expansion ring 5 contacting the rubber ring can be a serrated surface, which can effectively avoid the problem of insufficient friction of the smooth surface structure while increasing the friction.

[0035] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A port sealing structure of a trenchless repair system for a water supply pipeline, comprising: The municipal pipeline to be repaired; A glass fiber repair pipe structure layer arranged on the inner wall of the municipal pipe body; A PE material repair pipe structure layer provided on the inner wall of the glass fiber repair pipe structure layer; The glass fiber repair pipe structure layer and the PE material repair pipe structure layer together form an inner repair working layer. Both ends of the municipal pipe body are provided with an outer port sealing structure section without an inner repair working layer. The length of the port sealing structure section is Lcm; The invention is characterized in that the outer port sealing structure section with a clean inner wall is provided with an epoxy resin structure layer, and the epoxy resin structure layer extends to the inner port sealing structure section of the inner repair working layer, and the end of the inner repair working layer is an oblique cone structure; A rubber belt is provided at a position adjacent to the outer port sealing structure section of the municipal pipeline body and the inner port sealing structure section of the inner repair working layer, the rubber belt having a first structure section attached to the inner wall of the outer port sealing structure section, a third structure section attached to the inner wall of the inner port sealing structure section, and a second diameter-changing structure section provided between the first structure section and the third structure section, the outer side surface of the first structure section is provided with at least two circumferentially arranged first outer convex ribs, and the outer side surface of the third structure section is provided with at least two circumferentially arranged third outer convex ribs; The inner ring of the rubber belt is provided with a plurality of stainless steel expansion rings.

2. The port sealing structure of the water supply pipe trenchless repair system according to claim 1, characterized in that: A cushion membrane is arranged between the glass fiber repair pipeline structure layer and the municipal pipeline body.

3. The port sealing structure of the water supply pipe trenchless repair system according to claim 1, characterized in that: The stainless steel expansion ring comprises a non-closed stainless steel ring body, the open end of the stainless steel ring body is provided with a C-shaped butt end, and a tightening block is provided between the two C-shaped butt ends.

4. The port sealing structure of the water supply pipe trenchless repair system according to claim 1, characterized in that: A rubber belt sleeve between two circumferentially arranged first outer rib strips is provided with a carbon fiber ring with a rubber layer on the surface; The rubber belt sleeve between the two third outer convex ribs is provided with a carbon fiber ring with a rubber layer on the surface.

5. The port sealing structure of the water supply pipe trenchless repair system according to claim 1, characterized in that: The water-facing surface of the stainless steel expansion ring adopts an arc-shaped flow-guiding structure.

6. The port sealing structure of the water supply pipe trenchless repair system according to claim 1, characterized in that: The rubber ring contact surface of the stainless steel expansion ring is provided with a serrated structure.

7. The port sealing structure of the water supply pipe trenchless repair system according to claim 1, characterized in that: A restraining structure and a positioning structure are arranged between the ring body of the stainless steel expansion ring and the expansion block.

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