CN215721664U

CN215721664U - Internal expansion joint for lining pipe

Info

Publication number: CN215721664U
Application number: CN202122222063.XU
Authority: CN
Inventors: 王守涛; 哈峰凯; 高志涛
Original assignee: Tianjin Energy Solution Technology Co ltd
Current assignee: Tianjin Energy Solution Technology Co ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2022-02-01
Anticipated expiration: 2031-09-14

Abstract

The utility model discloses an internal expansion joint for a lining pipe, which is formed by connecting an outer sleeve and an inner core into a whole through end threads; the barb-type ring teeth of the inner core are embedded into the lining pipe through the expansion of the inner core inserted into the end part of the lining pipe and the extrusion of the outer sleeve sleeved outside the end part of the lining pipe, so that the sealing performance of the joint of the lining repairing pipe is ensured to be good, the lining pipe can be uniformly and continuously tensioned from the inside, after the extrusion, the barb-type ring teeth are uniformly attached to the lining pipe and extruded to firmly fix the lining pipe on the joint inner core, and the local discontinuous clamping cannot occur; the utility model can ensure that the pipeline is uniformly and continuously tightened in the circumferential direction of the pipeline, has good sealing property, simultaneously has no obvious necking on the pipeline after being installed, does not influence the overflowing capacity of the pipeline, and is stable and reliable for long-term use.

Description

Internal expansion joint for lining pipe

Technical Field

The utility model relates to a joint, in particular to an inner expansion joint for a lining pipe, and belongs to the technical field of pipeline repair.

Background

With the time of the urbanization process being prolonged, underground pipe networks of many cities are used for a long time, and most underground pipe networks are more than 30 years. Old pipelines are buried underground and are inconvenient to maintain, and a trenchless lining repairing mode is used as an economical and efficient method and is increasingly applied to repairing small-caliber pipelines. At present, non-excavation technology is mostly adopted for pipelines with the caliber exceeding 600mm, such large-caliber inner lining pipe pipelines are difficult to manufacture, but the installation of the joint is difficult to apply by adopting a conventional outer hoop form, and the use capacity of the pipeline is limited by obviously necking the pipeline by adopting the glue injection joint due to overlarge size of the pipeline. How to realize the reliable installation of the lining pipe joint with the caliber of more than 600mm and reduce the reduction influence on the inner diameter as much as possible is a problem which is urgently needed to be solved in the current engineering.

It is against this background that the present application proposes an internal expansion joint for lined pipes.

SUMMERY OF THE UTILITY MODEL

The main object of the present invention is to overcome the above disadvantages of the prior art and to provide an internal expansion joint for a liner tube.

The utility model is realized by the following technical scheme:

an internal expansion joint for a lining pipe comprises an outer sleeve and an inner core,

the outer sleeve is sleeved on the outer side of the end part of the lining pipe, the outer sleeve is a cylindrical structural part, and internal threads are machined in the front end of the outer sleeve;

the inner core is inserted into the end part of the lining pipe, the inner core is a cylindrical structural member, external threads matched with the internal threads of the outer sleeve are machined on the outer part of the front end of the inner core, and barb-shaped ring teeth embedded into the lining pipe through internal expansion are arranged on the outer wall of the inner core;

the outer sleeve and the inner core are connected into a whole through the internal thread at the front end of the outer sleeve and the external thread at the front end of the inner core.

The utility model has the beneficial effects that: due to the adoption of the technical scheme, the utility model,

the inner expansion joint for the lining pipe disclosed by the utility model has the advantages that the inner core inserted into the inner part of the end part of the lining pipe expands and the outer sleeve sleeved outside the end part of the lining pipe extrudes the lining pipe, the barb type ring teeth of the inner core are embedded into the lining pipe, the lining pipe repairing pipeline joint is ensured to have good sealing performance, meanwhile, the lining pipe can be uniformly and continuously expanded from the inside, the barb type ring teeth uniformly cling to the lining pipe after being installed and extruded, the lining pipe is firmly fixed on the inner core of the joint, the local discontinuous clamping cannot occur, the pipeline is uniformly and continuously hooped in the circumferential direction, the sealing performance is good, meanwhile, the joint is not obvious to the necking of the pipeline after being installed, the overflowing capacity of the pipeline is not influenced, and the inner expansion joint is stable and reliable for long-term use.

The utility model is further illustrated with reference to the following figures and examples.

Drawings

FIG. 1 is a schematic isometric view of the overall structure of a preferred embodiment of the present invention;

fig. 2 is a schematic view of the detailed structure of the joint according to the preferred embodiment of the present invention.

Wherein: 1. a jacket; 2. an inner core; 3. and (4) lining the pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-2, an internal expansion joint for an inner lining pipe comprises an outer sleeve 1 and an inner core 2, wherein the outer sleeve 1 is sleeved on the outer side of the end part of an inner lining pipe 3, the outer sleeve 1 is a cylindrical structural member, and internal threads are processed inside the front end of the outer sleeve 1; the inner core 2 is inserted into the end part of the lining pipe 3, the inner core 2 is a cylindrical structural member, external threads matched with the internal threads of the outer sleeve 1 are processed outside the front end of the inner core 2, and barb-shaped ring teeth embedded into the lining pipe 3 through internal expansion are arranged on the outer wall of the inner core 2; the outer sleeve 1 and the inner core 2 are connected into a whole with the external thread at the front end of the inner core 2 through the internal thread at the front end of the outer sleeve 1.

The application principle of the utility model is as follows:

designing an outer sleeve 1 and an inner core 2 of an inner expansion joint according to the size of an inner lining pipe 3, cleaning the outer sleeve 1 and the inner core 2 after the inner lining pipe 3 is transported to the site, cutting the inner lining pipe 3 after the inner lining pipe penetrates out and the pressure test is qualified, starting mounting the joint, cutting a plurality of handles which are uniformly distributed on the circumference of the end part of the inner lining pipe 3, connecting the inner core 2 with inner expansion mounting equipment, plugging the inner core into the inner lining pipe 3, and tensioning the handles to enable the inner lining pipe to be sleeved with the length meeting the requirement;

cutting the inner lining pipe 3 along the deepest position of the inner core 2 to form a parallel and level opening, sleeving the outer sleeve 1 into the inner sleeve and screwing the outer sleeve and the inner core 2 with threads, installing the rest parts of the internal expansion installation equipment, adjusting and aligning the rest parts, then operating the equipment to complete the internal expansion, expanding the inner core 2 to open the end part of the inner lining pipe 3, pressing the inner lining pipe 3 due to the limiting effect of the outer sleeve 1, embedding the barb type ring teeth on the outer wall of the inner core 2 into the inner lining pipe 3 to form uniform fixation, avoiding large local stress and ensuring more reliable sealing; and (4) dismantling the internal expansion equipment, carrying out pressure test after the joint is installed, and then carrying out pipeline tie-back to complete construction.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides an intraductal internal expanding of inside lining connects, includes overcoat (1) and inner core (2), its characterized in that:

the outer sleeve (1) is sleeved on the outer side of the end part of the inner lining pipe (3), the outer sleeve (1) is a cylindrical structural part, and internal threads are machined in the front end of the outer sleeve (1);

the inner core (2) is inserted into the end part of the lining pipe (3), the inner core (2) is a cylindrical structural part, external threads matched with the internal threads of the outer sleeve (1) are processed on the outer part of the front end of the inner core (2), and barb-shaped ring teeth embedded into the lining pipe (3) through internal expansion are arranged on the outer wall of the inner core (2);

the outer sleeve (1) and the inner core (2) are connected into a whole through the internal thread at the front end of the outer sleeve (1) and the external thread at the front end of the inner core (2).