Bimetal-composite-pipe liquid expansion forming base-pipe and liner-pipe gap waterproof device

A bimetallic composite pipe and waterproof device technology, which is applied in the direction of valve devices, functional valve types, control valves, etc., can solve the problems of increasing manufacturing costs, restricting the free deformation of liners, and complicated forming processes, achieving high reliability and low cost. Low, optimize the effect of waterproofing process

Active Publication Date: 2015-12-09
CHINA NAT HEAVY MACHINERY RES INSTCO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in order to prevent the problem of water ingress into the base liner, the traditional process is to weld the base pipe and the end of the liner, but in order to completely discharge the air between the base liner and the base pipe, it is necessary to drill holes at the end of the base pipe and use a special The equipment is vacuumed. The forming process is complex and limits the free deformation of the liner. In addition, after the composite pipe is formed, the hole at the end needs to be cut off, which increases the manufacturing cost.

Method used

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  • Bimetal-composite-pipe liquid expansion forming base-pipe and liner-pipe gap waterproof device
  • Bimetal-composite-pipe liquid expansion forming base-pipe and liner-pipe gap waterproof device
  • Bimetal-composite-pipe liquid expansion forming base-pipe and liner-pipe gap waterproof device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In order to overcome the defects of the base liner pipe waterproofing device of the existing bimetallic composite pipe, such as figure 1 As shown, this embodiment provides a bimetallic composite pipe liquid-expanded base liner gap waterproof device, including a base pipe 2 and a liner 1 located in the base pipe 2 and coaxial with the base pipe 2, the base pipe Two ends of 2 are respectively provided with a sealing pressure ring 6 sleeved on the liner 1, and a waterproof sealing ring 5 sleeved on the liner 1 is provided between the sealing pressure ring 6 and the liner 1; A first through hole 7 is opened in the radial direction, and an exhaust valve 4 for discharging the air between the inner wall of the base pipe 2 and the outer wall of the liner 1 is arranged in the first through hole 7 .

[0024] like figure 2 , the arrows in the figure indicate the main channels for water and gas to enter the bimetallic composite pipe, but the key to producing bimetallic composite ...

Embodiment 2

[0028] On the basis of embodiment 1, further, such as figure 1 and Figure 4 As shown, the sealing pressure ring 6 is provided with a diameter-reducing part 8 on the side close to the end of the base pipe 2, and the end-face seal 3 of the base pipe is sleeved on the diameter-reducing part 8, and the end face seal 3 of the base pipe is sealed with the end of the base pipe 2. touch.

[0029] The sealing pressure ring 6 is tightly fixed on the waterproof sealing ring 5, and a certain axial force is applied to the base pipe end face seal 3 to ensure that water will not enter from the end face of the base pipe 2, and the sealing pressure ring 6 cooperates with the base pipe end face seal 3 The use can further ensure the waterproof effect of the liquid-expanded-formed-based liner gap waterproof device for bimetallic composite pipes.

Embodiment 3

[0031] On the basis of Example 1, such as image 3 As shown, the exhaust valve 4 is a one-way valve, which is composed of a valve seat 401, a sealing steel ball 402, and a spring 403. The sealing steel ball 402 and the spring 403 are all located in the valve seat 401, and one end of the spring 403 is connected to the valve seat 401. The inner wall is fixedly connected, and the other end is connected with the sealing steel ball 402; the second through hole 9 coaxial with the first through hole 7 and the spring 403 is opened on the valve seat 401, and the diameter of the sealing steel ball 402 is larger than the second through hole 9 in diameter, the sealing steel ball 402 is located near the end of the liner 1.

[0032] It should be noted that the exhaust valve 4 is located in the first through hole 7 of the sealing pressure ring 6, and the sealing steel ball 402 is tightly pressed in the valve seat 401 by the force of the spring 403, and is in contact with the second through h...

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Abstract

The invention provides a bimetal-composite-pipe liquid expansion forming base-pipe and liner-pipe gap waterproof device. The bimetal-composite-pipe liquid expansion forming base-pipe and liner-pipe gap waterproof device comprises a base pipe and a liner pipe which is located in the base pipe and is coaxial with the base pipe. Sealing pressing rings arranged on the liner pipe in a sleeving manner are arranged at the two ends of the base pipe respectively. Waterproof sealing rings arranged on the liner pipe in a sleeving manner are arranged between the sealing pressing rings and the liner pipe. First through holes are formed in the sealing pressing rings in the radial direction, and air exhausting valves used for exhausting air between the inner wall of the base pipe and the outer wall of the liner pipe are arranged in the first through holes. By means of the bimetal-composite-pipe liquid expansion forming base-pipe and liner-pipe gap waterproof device, the air between the base pipe and the liner pipe can be easily exhausted, water can be prevented from entering the portion between the base pipe and the liner pipe, it can be guaranteed that the liner pipe can freely stretch out and draw back in the axial direction, the bimetal-composite-pipe liquid expansion forming waterproof technology is optimized, and the forming quality of a composite pipe is greatly improved while the manufacturing cost is reduced. The device has the beneficial effects of being simple in structure, convenient to install, high in reliability and low in cost.

Description

technical field [0001] The invention relates to a bimetallic composite pipe, in particular to a gap waterproof device for a bimetallic composite pipe liquid expansion forming base liner pipe. Background technique [0002] In recent years, with the rapid development of my country's 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 inner lining is a corrosion-resistant alloy, and the pipe layers are tightly bonded through various deformation and connection techniques. With good strength and corrosion resistance, and low cost, it has been widely recognized by domestic and foreign ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/06F16K15/04B21C37/06
Inventor 寇永乐梁国栋袁江龙徐能惠隋健李培力马海宽
Owner CHINA NAT HEAVY MACHINERY RES INSTCO
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