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Spigot-and-socket connection type liner steel-plastic composite pipe and production method thereof

A technology of steel-plastic composite pipe and plastic steel, which is applied in the direction of sleeve/socket connection, non-detachable pipe connection, pipe/pipe joint/pipe fitting, etc., which can solve the problems of inconvenient maintenance, unreliable sealing, and low service life. Achieve the effect of convenient maintenance and disassembly, high sealing reliability and long service life

Active Publication Date: 2015-04-29
JILING YULINGLONG STEEL PIPE STEEL STRUCTURE MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the steel-plastic composite pipes produced in China have a diameter of ≤φ200mm and a length of ≤7m. The connection method is usually welding. The welding method is a non-detachable structure. The two pipes are not well connected, and the welding is not good, especially the bottom welding is very difficult. There may be air leakage and water phenomenon, and maintenance is inconvenient; there are also flange connections, but the service life is low and the seal is not reliable

Method used

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  • Spigot-and-socket connection type liner steel-plastic composite pipe and production method thereof
  • Spigot-and-socket connection type liner steel-plastic composite pipe and production method thereof
  • Spigot-and-socket connection type liner steel-plastic composite pipe and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Embodiment 1, with reference to figure 1 , Figure 3 ~ Figure 5 , embodiment 1 is a kind of φ500×12000 socket-connected polyethylene-lined steel-plastic composite pipe, which includes equal-diameter steel pipe 3, socket steel pipe 4, trumpet-shaped socket 1 and polyethylene liner pipe 2, the The equal-diameter steel pipe 3 is a spiral welded steel pipe. One end of the equal-diameter steel pipe 3 is welded and fixed to the socket steel pipe 4, and the other end is welded and fixed to the small end of the horn-shaped socket 1. The polyethylene liner pipe 2 is fixedly connected to the socket steel pipe. 4 and the equal-diameter steel pipe 3 of the trumpet-shaped socket 1 are compounded and fixedly connected, and a socket tapered flange 5 is formed on the edge of the socket steel pipe 4 . The connecting structure between the adjacent front steel-plastic composite pipe 6 and the rear steel-plastic composite pipe 9 is: the spigot steel pipe 4 of the front steel-plastic compo...

Embodiment 2

[0126] Embodiment 2, with reference to figure 1 , Figure 3 ~ Figure 5 , Embodiment 2 is a φ500×12000 socket-connected polyethylene-lined steel-plastic composite pipe, the embodiment 2 is basically the same as the embodiment 1, the difference is that both the socket and the trumpet-shaped socket are carried out at the mouth Flanging, the manufacturing method is as follows:

[0127] 1) Making the base steel pipe

[0128] a. Load the strip material into the material chamber, run to the material cutting place, press and cut, two sheets are butted, pressed, and welded with gas shielded welding. The gas composition of gas shielded welding is 25% argon, 75% carbon dioxide, The flow rate is 0.5~0.6m3 / h, and the running speed of the material is 1.2m / min; DC-150 electric welding machine is used for welding, so that the welding wire is close to the workpiece, the flux buries the welding wire 50, and the welding starts, and the spiral welding in the tube hole is first carried out , an...

Embodiment 3

[0169] Embodiment 3, with reference to figure 1 , Figure 3 ~ Figure 5 , Example 3 is a φ500×12000 socket-connected polyethylene-lined steel-plastic composite pipe, which is basically the same as Example 2, except that some process parameters are different, and the manufacturing method is as follows:

[0170] 1) Making the base steel pipe

[0171] a. Load the strip material into the material chamber, run to the material cutting place, press and cut, two sheets are butted, pressed, and welded with gas shielded welding. The gas composition of gas shielded welding is 25% argon, 75% carbon dioxide, The flow rate is 0.5~0.6m3 / h, and the running speed of the material is 1.2m / min; DC-150 electric welding machine is used for welding, so that the welding wire is close to the workpiece, the flux buries the welding wire 50, and the welding starts, and the spiral welding in the tube hole is first carried out , and then perform spiral welding on the outer wall of the tube, the flux is si...

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Abstract

The invention relates to a spigot-and-socket connection type liner steel-plastic composite pipe and a production method of the spigot-and-socket connection type liner steel-plastic composite pipe. The spigot-and-socket connection type liner steel-plastic composite pipe comprises an equal-diameter steel pipe, and is characterized by further comprising a spigot steel pipe, one end of the equal-diameter steel pipe is fixedly connected with the spigot steel pipe by welding, the other end of the equal-diameter steel pipe is fixedly connected with the small end of a flared socket by welding, and a plastic liner pipe is combined with the equal-diameter steel pipe fixedly connected with the spigot steel pipe and the flared socket in a fixed connection manner. The connection structure is as follows: the spigot steel pipe of a front steel-plastic composite pipe is in tight contact with the liner pipe of the flared socket of a rear steel-plastic composite pipe, and is in tight contact with the liner pipe of the flared socket of the rear steel-plastic composite pipe through sealing rings arranged on the spigot steel pipe of the front steel-plastic composite pipe. The production steps are as follows: basal steel pipe production, plastic liner pipe production, plastic liner pipe insertion, hot fusion, flared socket sizing, spigot flanging and cleaning. Since the spigot-and-socket insertion, conical part sealing and double-sealing ring sealing connection method is adopted, the spigot-and-socket connection type liner steel-plastic composite pipe has the advantages of simple structure, high sealing reliability, quick installation, convenience in maintenance and dismantling, long service life and the like.

Description

technical field [0001] The invention relates to the field of pipelines, and relates to a socket-connection plastic-lined steel-plastic composite pipe and a manufacturing method thereof. Background technique [0002] Pipeline transportation is a long-distance transport method of transporting liquid and gas materials using pipelines as a means of transportation. Transportation has the advantages of less energy consumption, low cost and good benefits. The pipe is the main component of the pipeline. According to the material, there are several types of pipes, such as steel pipes, cast iron pipes, reinforced concrete pipes, and non-metallic pipes. The connection methods include socket connections, flange connections, welding, and bonding. The socket connections are pipes. The connection method is convenient, fast, safe and efficient. Since the socket connection pipe belongs to the different diameter pipe, in the pipes of the prior art, it is only used on cast iron pipes and rein...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/147F16L25/10B29C65/32B29B11/00B29B11/10
CPCB29C48/92B29C2948/92019B29C2948/92209F16L9/147F16L13/02F16L21/02
Inventor 费敏建
Owner JILING YULINGLONG STEEL PIPE STEEL STRUCTURE MFG
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