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A high-pressure sealing method for pipe joints

A technology of high-pressure sealing and pipe joints, which is applied in the direction of pipes/pipe joints/fittings, pipe components, mechanical equipment, etc., can solve the problems of low reuse rate, poor economy, complicated operation, etc., and achieve convenient operation, low cost, and sealing good effect

Active Publication Date: 2021-04-02
HARBIN ELECTRIC CORP QINHUANGDAO HEAVY EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The conventional sealing technology means is to use welding technology to weld the sealing cover on the pipe nozzle, and then cut and remove the cover after the pressure test is qualified. High; 2. After cutting and removing the cap, it is necessary to perform procedures such as beveling on the nozzle, which is complicated to operate and high in cost; 3. Low reuse rate and poor economy

Method used

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  • A high-pressure sealing method for pipe joints
  • A high-pressure sealing method for pipe joints
  • A high-pressure sealing method for pipe joints

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0092] Apply the pipe joint sealing method of the present invention to the pressure test of the heat transfer tube of the nuclear power steam generator equipment, the specification of the heat transfer tube And the sealing (or air tightness) of the sealing device is tested,

[0093] The sealing device of the present invention is used to detect the sealing performance of the heat transfer tube of the nuclear power steam generator equipment, and it is found that there is no visible deformation and abnormal sound at the sealing part, and no air leakage is detected by applying soap liquid at the sealing boundary, and the pressure is not high during the pressure test and pressure holding process. Change, good sealing.

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Abstract

The invention discloses a pipe connector high-pressure sealing method. The method comprises the following steps that a sealing device is installed or prepared; and the sealing device extends into a pipe connector (1), torque is exerted on a fastener (6) or a combination part, and sealing is achieved. The sealing device comprises an elastic part (3) and a connecting part which can exert axial forceon the elastic part (3) and make the elastic part (3) to deform in the radial direction. The connecting part comprises a connecting rod (2) and the fastener (6) connected with the connecting rod (2).According to the sealing device, the axial force is exerted on the elastic part, the elastic part and the inner wall of the pipe connector are closely attached, and sealing of the pipe connector is achieved. The sealing method is good in sealing performance, the adopted sealing device is simple in structure, convenient to operate, economical, reasonable and capable of being utilized repeatedly, the number of machining working procedures is small, and the sealing device is applied to the technical field of high-pressure sealing of various container pipe connectors.

Description

technical field [0001] The invention relates to a sealing method, in particular to a pipe joint sealing method. Background technique [0002] Industrial containers, especially pressure vessels, often involve the sealing technology of non-flange pipe joints on these pressure vessels. When the heat exchange tube is subjected to a pressure test, the end of the tube needs to be pressure-sealed. [0003] The conventional sealing technology means is to use welding technology to weld the sealing cover on the pipe nozzle, and then cut and remove the cover after the pressure test is qualified. High; 2. After cutting and removing the cap, it is necessary to perform procedures such as beveling on the nozzle, which is complicated to operate and high in cost; 3. The reuse rate is low and the economy is poor. [0004] Therefore, there is an urgent need to develop a sealing method for pipe joints that is simple in process, easy to operate, easy to disassemble, reusable, and economical an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L55/11
Inventor 张勇白海永张渲楠赵姗姗何春艳张和悦
Owner HARBIN ELECTRIC CORP QINHUANGDAO HEAVY EQUIP
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