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Bimetal composite pipe forming system with heating and hydraulic pressure coupling function

A bimetallic composite pipe and function technology, which is applied in the field of bimetallic composite pipe forming system to achieve the effect of improving the forming quality

Active Publication Date: 2016-01-06
CHINA NAT HEAVY MACHINERY RES INSTCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a new bimetallic composite pipe forming process and system, on the one hand to improve the forming quality of bimetallic composite pipe, and on the other hand to solve the problem that the existing mechanical forming method can only meet the requirement that the material of the liner pipe is better than that of the base pipe. Composite forming of bimetallic pipes made of different materials, the method provided by the invention is more suitable for composite forming of bimetallic pipes whose liner material is poorer than that of the base pipe

Method used

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  • Bimetal composite pipe forming system with heating and hydraulic pressure coupling function
  • Bimetal composite pipe forming system with heating and hydraulic pressure coupling function
  • Bimetal composite pipe forming system with heating and hydraulic pressure coupling function

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Effect test

Embodiment 1

[0024] Such as Figure 7 As shown in the figure, a system suitable for bimetallic composite pipe forming process with coupling effect of heating and hydraulic pressure includes intermediate frequency heating furnace 2, resistance holding furnace 3 and cooling expansion device 7, resistance holding furnace 3 is located between intermediate frequency heating furnace 2 and Between the cooling expansion device 7, it is characterized in that the resistance holding furnace 3 is fixed on the mobile device 4, and the resistance holding furnace 3 is also provided with a placement hole that can be loaded with the cooling expansion device 7; the cooling expansion The shape device 7 includes a circulating water outlet pipeline 705 and a circulating water inlet pipeline 706; the liner 5 is fixedly threaded on the support rod 6, and the two ends of the liner 5 are respectively provided with sealing rings 8 sleeved on the support rod 6 to support A circulating water channel 704 is formed bet...

Embodiment 2

[0028] On the basis of Embodiment 1, in order to facilitate the water pressure expansion and quickly increase the pressurized water required for the water pressure expansion, the pressurized water input line 708 is provided with a supercharger 707, and the sealing ring 8 is a U-shaped sealing ring. Further, the sealing ring 8 in this embodiment adopts a high-temperature-resistant U-shaped sealing ring.

Embodiment 3

[0030] On the basis of Embodiment 1, the resistance holding furnace 3 is fixed on the moving device 4 , and the moving device 4 is composed of a support plate 401 and a roller 402 installed on the bottom surface of the support plate 401 . Since the substrate tube 1 and the resistance holding furnace 3 need to be moved together, the moving device 4 can be used to move more labor-saving and accurately, and improve the working efficiency.

[0031] Such as figure 1 As shown, the present invention provides a bimetal composite pipe forming process of heating and hydraulic coupling, comprising the following steps:

[0032] Step 1: Put the liner pipe 5 on the support rod 6 parallel to the ground. The cooling expansion device 7 is installed on the support rod 6, and the cooling water inlet valve 701 and the cooling water outlet valve 702 of the cooling expansion device 7 are opened. The liner 5 is cooled by circulation;

[0033] Step 2: put the substrate tube 1 into the intermediate ...

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Abstract

The invention provides a bimetal composite pipe forming technology and system with the heating and hydraulic pressure coupling function. The bimetal composite pipe forming technology comprises the following steps: firstly, a parent pipe is heated, then, a liner tube is sleeved with the parent pipe together in a penetrating manner, hydraulic pressure is applied to the liner pipe for expansion, the liner pipe has elastic deformation, when the hydraulic pressure is continuously increased, the liner pipe has plastic deformation, the outer surface of the liner pipe closely fits the inner surface of the parent tube, the hydraulic pressure is continuously increased, the liner pipe and the parent tube deform simultaneously, and at the moment, the parent pipe has elastic deformation only; afterwards, the hydraulic pressure expansion pressure is decreased to zero, and the liner pipe is cooled; finally, the compounded composite pipe is naturally cooled to the room temperature, and the compound technology is completed. With adoption of the bimetal composite pipe forming technology, the forming quality of the bimetal composite pipe is improved on one hand, and the problem about the composite forming of the bimetal composite pipe with the liner pipe quality better than the parent pipe quality is solved on the other hand. The bimetal composite pipe forming technology is particularly applicable to the composite forming of the bimetal composite pipe with the liner pipe quality worse than the parent pipe quality

Description

technical field [0001] The invention relates to a bimetallic composite pipe forming system with coupled effects of heating and hydraulic pressure. Background technique [0002] In recent years, with the rapid development of the world economy, the demand for energy is increasing. In order to meet market needs, the exploitation of oil and gas fields is gradually developing in the direction of high corrosion environments such as deep wells, oceans, and remote lands. Therefore, it is necessary to develop high-quality high-acid resistant pipes. The bimetallic composite pipe is composed of two metal pipes of different materials: the base pipe is a high-strength carbon steel pipe, the lining layer is a corrosion-resistant alloy, and the pipe layers are tightly combined through various deformation and connection techniques. Composite pipes not only have good strength and corrosion resistance, but also have low cost, and have been widely recognized by domestic and foreign markets and...

Claims

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Application Information

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IPC IPC(8): B21D39/04B21D26/033
Inventor 寇永乐刘慧超隋健李培力马海宽高尚晖
Owner CHINA NAT HEAVY MACHINERY RES INSTCO