CN-224214920-U - Thermal shrinkage sealing connection pipe fitting and pipe fitting assembly

CN224214920UCN 224214920 UCN224214920 UCN 224214920UCN-224214920-U

Abstract

The utility model belongs to the technical field of connecting pipe fittings, in particular to a heat-shrinkable sealing connecting pipe fitting and a pipe fitting assembly, which comprises a pipe fitting body, wherein the pipe fitting body is provided with a port, the inner side wall of the pipe fitting body is provided with an inner thread at a position close to the port, the pipe fitting body is coated with a crosslinked polyethylene insulating anticorrosive layer, and the end part of the crosslinked polyethylene insulating anticorrosive layer extends towards one end far away from the port to form a heat-shrinkable sealed pipe section. The heat-shrinkable sealed connecting pipe is provided with the crosslinked polyethylene insulating anticorrosive layer outside, the service life is longer, the service life can reach more than 50 years, the heat-shrinkable sealed pipe section has a shape memory function through heating expansion after radiation crosslinking, the heat-shrinkable sealed connecting pipe can be heat-shrunk and coated on the outer side of the polyethylene anticorrosive steel pipe, the sealing function is achieved, external rainwater and the like are prevented from entering the threaded connection position between the heat-shrinkable sealed connecting pipe and the polyethylene anticorrosive steel pipe, threads are corroded, and the crosslinked polyethylene material has good insulating property.

Inventors

XU HUANPING
LI JINGRU
YIN LILI
LI XIANQIN

Assignees

潍坊中石科技有限公司

Dates

Publication Date: 20260508
Application Date: 20250224

Claims (8)

1. The utility model provides a thermal shrinkage sealing connection pipe fitting, includes the pipe fitting body, its characterized in that, the pipe fitting body is equipped with the port, the position that is close to the port on the inside wall of pipe fitting body is equipped with the internal thread, the outside cladding of pipe fitting body has the insulating anticorrosive coating of crosslinked polyethylene, the tip orientation of the insulating anticorrosive coating of crosslinked polyethylene is kept away from the one end of port extends and forms thermal shrinkage sealing pipe section.
2. The heat-shrinkable sealed connection tube according to claim 1, wherein a sloping end wall is arranged at the port of the tube body, and the inner side wall of the heat-shrinkable sealed tube section extends onto the sloping end wall near one end of the port.
3. The heat-shrinkable sealed connection tube of claim 2 wherein the crosslinked polyethylene insulation corrosion protection layer and the heat-shrinkable sealed tube section are integrally formed.
4. The heat-shrinkable sealed connection tube of claim 1 wherein the port and the heat-shrinkable sealed tube section are each provided with one, two, three or four.
5. The heat-shrinkable sealed joint tube according to any one of claims 1 to 4, wherein the length of the heat-shrinkable sealed tube section is greater than 1cm and the thickness of the crosslinked polyethylene insulation anti-corrosion layer is 0.5mm to 2.5mm.
6. The heat-shrinkable sealed connection tube of claim 5, wherein an adhesive layer is provided on an inner sidewall of the heat-shrinkable sealed tube section.
7. The heat-shrinkable sealed connection pipe fitting assembly is characterized by comprising the heat-shrinkable sealed connection pipe fitting disclosed in claim 1, wherein a polyethylene anti-corrosion steel pipe is connected to the inner side of the port in a threaded manner, and the heat-shrinkable sealed pipe section is coated on the outer side of the polyethylene anti-corrosion steel pipe.
8. The heat shrink sealed connection tube assembly of claim 7, wherein the polyethylene anti-corrosion steel tube comprises a steel tube and a polyethylene anti-corrosion layer coating the outside of the steel tube.

Description

Thermal shrinkage sealing connection pipe fitting and pipe fitting assembly Technical Field The utility model relates to the technical field of connecting pipe fittings, in particular to a heat-shrinkable sealing connecting pipe fitting and a pipe fitting assembly. Background Overhead lines refer to pipe systems that are installed on the ground or an overhead structure for transporting various liquids or gases. It is usually composed of pipes, tubes, brackets, etc. and can be hung on bridges, towers, brackets, etc. structures. The overhead pipeline has wide application in industries such as petroleum, natural gas, chemical industry, electric power and the like, and has the advantages of cost saving, high flexibility, strong expandability and the like. The conventional overhead pipeline generally adopts a galvanized pipe, but for the galvanized pipe used outdoors as the overhead pipeline, the service life of the galvanized pipe is only 15-25 years due to corrosion effects of rainwater, air and the like, photoaging caused by outdoor ultraviolet irradiation and the like, and on the other hand, the overhead pipeline used outdoors at high altitude is inconvenient to overhaul and replace due to the too high height. When the galvanized pipe is connected with a pipe fitting, a polytetrafluoroethylene-raw material belt is generally adopted to wind the thread part and then connect the galvanized pipe with the galvanized pipe fitting, and in the use process, rainwater easily enters the thread part from the outside, so that the thread is corroded, and the tightness between the galvanized pipe and the galvanized pipe fitting is weakened. Disclosure of utility model The utility model aims to provide a heat-shrinkable sealing connection pipe fitting and a pipe fitting assembly, which solve the problems in the background art. In order to achieve the technical purpose, the technical scheme of the utility model comprises the following steps: The utility model provides a thermal shrinkage sealing connection pipe fitting, includes the pipe fitting body, the pipe fitting body is equipped with the port, the position that is close to the port on the inside wall of pipe fitting body is equipped with the internal thread, the outside cladding of pipe fitting body has the insulating anticorrosive coating of crosslinked polyethylene, the tip orientation of the insulating anticorrosive coating of crosslinked polyethylene is kept away from the one end of port extends and forms thermal shrinkage sealing pipe section. As an improvement, a sloping end wall is arranged at the port of the pipe fitting body, and one end, close to the port, of the inner side wall of the heat-shrinkable sealing pipe section extends to the sloping end wall. As a further improvement, the crosslinked polyethylene insulating anticorrosive layer and the heat-shrinkable sealed tube section are integrally formed. As a further improvement, the port and the heat-shrinkable sealed tube section are each provided with one, two, three or four. As a further improvement, the length of the heat-shrinkable sealed pipe section is more than 1cm, and the thickness of the crosslinked polyethylene insulating anticorrosive layer is 0.5mm-2.5mm. As a further improvement, an adhesive layer is arranged on the inner side wall of the heat-shrinkable sealed pipe section. The utility model also provides a heat-shrinkable sealed connecting pipe fitting assembly, which comprises a heat-shrinkable sealed connecting pipe fitting, wherein the inner side of the port is in threaded connection with a polyethylene anti-corrosion steel pipe, and the heat-shrinkable sealed pipe section is coated on the outer side of the polyethylene anti-corrosion steel pipe. As a further improvement, the polyethylene anti-corrosion steel pipe comprises a steel pipe and a polyethylene anti-corrosion layer coated on the outer side of the steel pipe. By adopting the technical scheme, the utility model has the beneficial effects that: According to the heat-shrinkable sealed connecting pipe fitting and pipe fitting assembly, the heat-shrinkable sealed connecting pipe fitting is connected with the polyethylene anti-corrosion steel pipe through the threads, fluid leakage in the polyethylene anti-corrosion steel pipe is prevented, the cross-linked polyethylene insulating anti-corrosion layer is arranged outside the heat-shrinkable sealed connecting pipe fitting, the service life is longer, the service life can reach more than 50 years, the heat-shrinkable sealed anti-corrosion layer has a shape memory function through heating expansion after radiation cross-linking, the heat-shrinkable sealed anti-corrosion layer can be heat-shrinkable coated on the outer side of the polyethylene anti-corrosion steel pipe, the sealing function is achieved, external rainwater, air and the like are prevented from entering the thread connecting position between the heat-shrinkable sealed connecting pipe fitting and the polyethylene anti-corrosi