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Natural gas pipe testing device

A test equipment and natural gas technology, which is applied in the testing of machine/structural components, testing of fluid tightness, measuring devices, etc., can solve the problem of inability to judge the welding effect on the spot, and the tightness of the welding joint is not fast, simple, effective and low cost, leakage hazards and other issues, to achieve the effect of low test cost, good accuracy, and simple use process

Active Publication Date: 2019-02-22
GUIGANG ENN GAS ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the PE natural gas pipe and the electrofusion casing are thermally welded, there is currently no fast, simple, effective, and low-cost detection method for the sealing of the weld, so it is impossible to judge the welding effect on the spot, resulting in increased leakage hazards

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as Figure 1 to Figure 12 as shown,

[0036] A natural gas pipe fitting testing equipment,

[0037] It includes a sleeve 1, a push column 2, at least one small base ring 3 sleeved on the sleeve and at least one large base ring 4 sleeved on the sleeve;

[0038] One end of the push column is provided with a dynamic limit ring 5 for contacting the end of the sleeve, the small base ring is provided with a small inflatable sealing ring 31 that can be sealed with the inner wall of the PE natural gas pipe 7, and the large base ring is provided with a The large inflatable sealing ring 41 that is sealed and matched with the inner wall of the electrofusion sleeve 8, and one of the large base rings is provided with a positioning body for contacting the end of the PE natural gas pipe;

[0039] The sleeve is provided with a sealing hole 1a, a sealing air channel 1b and a booster hole 1c, the small inflatable sealing ring is connected to the sealing air channel, the large infl...

Embodiment 2

[0053] Such as Figure 1 to Figure 12 as shown,

[0054] A method for testing natural gas pipe fittings, including a natural gas pipe fitting testing equipment as described in Example 1, said natural gas pipe fitting testing equipment includes a sleeve 1, a push column 2, at least one small Base ring 3 and at least one large base ring 4 sleeved on the sleeve; one end of the push column is provided with a dynamic limit ring 5 for contacting the end of the sleeve, and a small base ring is provided with a PE natural gas pipe 7 A small inflatable sealing ring 31 with a sealing fit on the inner wall, and a large inflatable sealing ring 41 that can be sealingly matched with the inner wall of the electrofusion casing 8 is provided on the large base ring, and a positioning body for contacting the end of the PE natural gas pipe is provided on one of the large base rings ; The sleeve is provided with a sealing hole 1a, a sealing air channel 1b and a booster hole 1c, the small inflatabl...

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Abstract

The invention discloses a natural gas pipe testing device. One end of a pushing column is provided with a moving limit ring, a small inflatable sealing ring is arranged on a small base ring, a large inflatable sealing ring is arranged on a large base ring, and a sealing hole, a sealing air passage and a pressurizing hole are arranged on a sleeve. One end of the sleeve is provided with a sealing plate, and a first piston and a second piston are arranged in the sleeve. When the sealing hole communicates with a second pressure chamber, the pressurizing hole is sealed by the first piston, when thesecond piston seals the sealing hole and a return spring is in a natural state, the first piston seals the pressurizing hole, and when the pressurizing hole communicates with the second pressure chamber, the second piston seals the sealing hole. The invention has the advantages that the sealing performance of a welding part between a PE natural gas pipe and an electric melting sleeve can be effectively performed, the use process is simple, only the completion of insertion, pushing and taking out operations is needed, an additional power structure is not needed in a test process, so the test cost is low, the data can be visually observed to judge a result, a possible leak point is only a welding part, and so the test result is accurate.

Description

technical field [0001] The invention belongs to the technical field of natural gas pipelines, and in particular relates to testing equipment for natural gas pipe fittings. Background technique [0002] PE natural gas pipelines have been widely used in the field of natural gas transportation. PE natural gas pipelines mainly include PE natural gas pipes, electrofusion casings, PE valves, brackets and other structures. During the layout of PE natural gas pipelines, PE natural gas pipes have the highest utilization rate (PE natural gas pipes are used in the main part of the pipeline); while PE natural gas pipes are connected to other structures (metal branch pipes, metal valves, PE branch pipes, PE valves, etc.) , it needs to be connected by electrofusion sleeve. [0003] The electrofusion casing belongs to the existing technology in the field of PE pipe valves. It includes a PE pipe body and a heating resistance wire arranged on the inner layer of the PE pipe. There are also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/28
CPCG01M3/2869
Inventor 秦飞
Owner GUIGANG ENN GAS ENG CO LTD