Socket pipe piece of heat melted connection

Abstract

The present invention discloses a hot-melt connecting spigot-and-socket pipe fitting for aluminium plastics composite pipe. At least one end of said pipe fitting possesses adjacent spigot-and-socket part and internal layer connecting part, the rear portion of said spigot-and-socket part is equipped with an exhaust viewing hole, and the internal and external layer hot-melt connections of said joint are not identical in length, so that said invention can completely solve the exhaust problem produced when the aluminium plastics composite pipe and spigot-and-socket pipe fitting are hot-melt connected.

Description

technical field

[0001] The invention relates to the technical field of connecting pipe fittings for aluminum-plastic composite pipes, in particular to a hot-melt connection socket pipe fitting for aluminum-plastic composite pipes. Background technique

[0002] There are two methods for the existing aluminum-plastic composite pipe hot-melt fittings. One is the outer layer welding method, that is, the outer layer of the pipe is hot-melt connected with the inner layer of the hot-melt pipe fitting. This connection method is generally used in ordinary plastic When the pipe hot-melt connection is applied to the aluminum-plastic composite pipe, since the aluminum alloy layer at the port of the aluminum-plastic composite pipe is not sealed, it is easy to corrode the aluminum alloy layer when the pipeline transports liquid, resulting in the delamination of the pipe, which greatly reduces the The safety performance of pipeline use.

[0003] Another kind is inner and outer layer weldi...

Examples

Embodiment 1

[0019] see figure 1 , figure 2 As shown, one end of a hot-melt connection socket fitting for aluminum-plastic composite pipe is a joint 1, which is composed of an inner layer connection section 6 at the front end and a socket section 5 adjacent thereto, and the inner layer connection Section 6 is equal in diameter to the inner ring 1-2 of socket section 5 and is connected as a whole. An annular socket 3 is formed between them, and four radial exhaust observation holes 2 are evenly distributed on the same circumference at the rear of the outer ring 1-1. The axial length of the inner layer connection section 6 is longer than that of the socket section 5, the inner layer connection section 6 and the outer ring surface of the inner ring 1-2 form the main connection surface of the hot-melt connection, and the inner ring surface of the outer ring 1-1 It is the sealing end surface of the aluminum-plastic composite pipe 4, which belongs to the secondary connecting surface, and the ...

Embodiment 2

[0022] see image 3 As shown, compared with embodiment 1, the present embodiment has the following differences in the structure of joint 1:

[0023] The single-layer connection section of the joint 1 adopts the outer layer connection section 7 , which is an equal-diameter extension section of the outer ring 1 - 1 of the socket section 5 .

[0024] All the other structures are the same as in Example 1. The axial length of the outer layer connection section 7 is longer than the axial length of the socket section 5, and the outer layer connection section 7 and the inner ring surface of the outer ring 1-1 form the main connection surface of the hot-melt connection, and the inner ring 1-2 The outer ring surface of the aluminum-plastic composite pipe 4 is the sealing end surface of the aluminum-plastic composite pipe 4, which belongs to the secondary connection surface. The outer layer connecting section 7 and the pipe ring of the outer ring 1-1 are equal in diameter and wall thick...

technical field

[0001] The invention relates to the technical field of connecting pipe fittings for aluminum-plastic composite pipes, in particular to a hot-melt connection socket pipe fitting for aluminum-plastic composite pipes. Background technique

[0002] There are two methods for the existing aluminum-plastic composite pipe hot-melt fittings. One is the outer layer welding method, that is, the outer layer of the pipe is hot-melt connected with the inner layer of the hot-melt pipe fitting. This connection method is generally used in ordinary plastic When the pipe hot-melt connection is applied to the aluminum-plastic composite pipe, since the aluminum alloy layer at the port of the aluminum-plastic composite pipe is not sealed, it is easy to corrode the aluminum alloy layer when the pipeline transports liquid, resulting in the delamination of the pipe, which greatly reduces the The safety performance of pipeline use.

[0003] Another kind is inner and outer layer weldi...

Examples

Embodiment 1

[0019] see figure 1 , figure 2 As shown, one end of a hot-melt connection socket fitting for aluminum-plastic composite pipe is a joint 1, which is composed of an inner layer connection section 6 at the front end and a socket section 5 adjacent thereto, and the inner layer connection Section 6 is equal in diameter to the inner ring 1-2 of socket section 5 and is connected as a whole. An annular socket 3 is formed between them, and four radial exhaust observation holes 2 are evenly distributed on the same circumference at the rear of the outer ring 1-1. The axial length of the inner layer connection section 6 is longer than that of the socket section 5, the inner layer connection section 6 and the outer ring surface of the inner ring 1-2 form the main connection surface of the hot-melt connection, and the inner ring surface of the outer ring 1-1 It is the sealing end surface of the aluminum-plastic composite pipe 4, which belongs to the secondary connecting surface, and the ...

Embodiment 2

[0022] see image 3 As shown, compared with embodiment 1, the present embodiment has the following differences in the structure of joint 1:

[0023] The single-layer connection section of the joint 1 adopts the outer layer connection section 7 , which is an equal-diameter extension section of the outer ring 1 - 1 of the socket section 5 .

[0024] All the other structures are the same as in Example 1. The axial length of the outer layer connection section 7 is longer than the axial length of the socket section 5, and the outer layer connection section 7 and the inner ring surface of the outer ring 1-1 form the main connection surface of the hot-melt connection, and the inner ring 1-2 The outer ring surface of the aluminum-plastic composite pipe 4 is the sealing end surface of the aluminum-plastic composite pipe 4, which belongs to the secondary connection surface. The outer layer connecting section 7 and the pipe ring of the outer ring 1-1 are equal in diameter and wall thick...

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