Large-diameter lining pipeline tee joint

By combining the use of an EPDM rubber tee, a stainless steel inner expansion ring and a half-joint tee structure with a wedge, the problems of broken pipes, long installation time and high costs in repairing the lining of large-diameter pipelines are solved, thereby simplifying operations and reducing costs.

CN223360211UActive Publication Date: 2025-09-19ZHEJIANG NINGSHUI WATER TECH CO LTD
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Patent Information

Application Number
CN202422850471.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-22
Publication Date
2025-09-19
Estimated Expiration
2034-11-22

AI Technical Summary

Technical Problem

In the prior art, repairing the lining of large-diameter pipelines requires cutting the pipe and installing a special joint, which leads to problems of complex operation, long cycle and high cost.

Method used

A large-diameter lined pipe tee consisting of an EPDM rubber tee, a stainless steel inner expansion ring, a stainless steel wedge and a half joint tee is used. It is installed at the opening of the repaired pipe through the half joint tee, and the EPDM rubber tee is fixed with the stainless steel inner expansion ring and wedge, so that the tee can be directly installed without cutting the original pipe.

Benefits of technology

It enables the direct installation of the tee without cutting off the original pipeline, which simplifies the operation process, shortens the installation time and reduces costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

A large-diameter lining pipeline tee joint is composed of an ethylene propylene diene monomer tee joint body, a stainless steel inner expansion ring, a stainless steel wedge block and a Haff joint tee joint body, the Haff joint tee joint body is installed at a hole of a repaired pipeline, and the ethylene propylene diene monomer tee joint body is installed on the inner side of a lining pipe of the repaired pipeline in an opening mode through the stainless steel inner expansion ring. And the stainless steel inner expansion ring is fixed through a stainless steel wedge block. An original pipeline and a lining pipeline do not need to be cut off, holes are directly formed in the positions where the tee joint needs to be formed, after the Hough joint tee joint is installed, the special ethylene propylene diene monomer tee joint internal expansion ring is opened to be installed in the pipeline, the ethylene propylene diene monomer tee joint and the sealing structure can bear the internal pressure of 2.5 Mpa and the external pressure of 0.5 Mpa, the stainless steel internal expansion ring is of an integrated structure, and therefore the sealing structure is simple in structure and convenient to use. And the special wedge is fixed after the special jack is internally expanded, so that a sealing effect is achieved, and media in the pipeline are prevented from flowing into an interlayer between the lining pipe and the old pipeline.
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Description

Technical Field

[0001] The utility model relates to the technical field of lined pipeline repair pipe fittings, in particular to a large-diameter lined pipeline tee. Background Art

[0002] After repairing the lining of a large-diameter pipeline, a tee cannot be directly opened on the lined pipe. Instead, the lining pipe and the original pipe are cut, a dedicated joint is made, and a tee is made on the intermediate short section of the dedicated joint. When making the tee, the lining pipe must be longer than the original pipe, and the lining pipe must not be damaged when cutting the original pipe. This requires a large excavation pit, a long pipe cutting cycle, and a long time and high cost to install the dedicated joint. Opening a tee on a lined pipeline has long been a technical problem in lining repair. Utility Model Content

[0003] The utility model provides a large-diameter lined pipe tee, which solves the problems in the prior art of lined pipe repair requiring pipe breaking, long installation time and high cost.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A large-diameter lined pipe tee consists of an EPDM rubber tee, a stainless steel inner expansion ring, a stainless steel wedge and a half joint tee. The half joint tee is installed at the opening of the repaired pipe. The EPDM rubber tee is expanded by the stainless steel inner expansion ring and installed on the inner side of the inner liner of the repaired pipe. The stainless steel inner expansion ring is fixed by a stainless steel wedge.

[0006] A rubber sealing ring is provided at the connection between the above-mentioned half joint tee and the repair pipe.

[0007] The utility model does not need to cut off the original pipeline and the liner pipeline. A hole can be directly opened where a tee is needed. After the half-joint tee is installed, a special EPDM rubber tee is expanded and installed in the pipeline with an internal expansion ring. The EPDM rubber tee and the sealing structure can withstand an internal pressure of 2.5 MPa and an external pressure of 0.5 MPa. The stainless steel internal expansion ring has an integrated structure. After being expanded by a special jack, it is fixed with a special wedge to play a sealing role to prevent the medium in the pipeline from flowing into the interlayer between the liner pipe and the old pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0009] Figure 1 It is a structural diagram of the present utility model.

[0010] In the figure, 1 is EPDM rubber tee, 2 is stainless steel inner expansion ring, 3 is stainless steel wedge, 4 is half joint tee, 5 is rubber sealing ring, 6 is repaired pipe, and 7 is inner liner pipe. DETAILED DESCRIPTION

[0011] As shown in the figure, a large-diameter lined pipe tee is composed of an EPDM rubber tee 1, a stainless steel inner expansion ring 2, a stainless steel wedge 3 and a half joint tee 4. The half joint tee 4 is installed at the opening of the repair pipe 6. A rubber sealing ring 5 is provided at the connection between the half joint tee 4 and the repair pipe 6. The EPDM rubber tee 1 is expanded by the stainless steel inner expansion ring 2 and installed on the inner side of the inner liner 7 of the repair pipe 6. The stainless steel inner expansion ring 2 is fixed by the stainless steel wedge 3.

[0012] The utility model does not need to cut off the original pipeline and the liner pipeline. A hole can be directly opened where a tee is needed. After the half-joint tee is installed, a special EPDM rubber tee is expanded and installed in the pipeline with an internal expansion ring. The EPDM rubber tee and the sealing structure can withstand an internal pressure of 2.5 MPa and an external pressure of 0.5 MPa. The stainless steel internal expansion ring has an integrated structure. After being expanded by a special jack, it is fixed with a special wedge to play a sealing role to prevent the medium in the pipeline from flowing into the interlayer between the liner pipe and the old pipeline.

Claims

1. Large diameter lined pipe tee, characterized by It consists of an EPDM rubber tee, a stainless steel inner expansion ring, a stainless steel wedge and a half joint tee. The half joint tee is installed at the opening of the repair pipe. The EPDM rubber tee is expanded by the stainless steel inner expansion ring and installed on the inner side of the inner liner of the repair pipe. The stainless steel inner expansion ring is fixed by a stainless steel wedge.

2. The large-diameter lined pipe tee according to claim 1 is characterized in that A rubber sealing ring is installed at the connection between the half joint tee and the repair pipe.