A gas supply test device

Abstract

The invention discloses a gas supply testing device, which comprises a main engine seat, a gas supply pump, a plugging cylinder, a compacting cylinder, an axle tube, a limiting seat, and a joint support frame, wherein a positioning plate is arranged on a compacting piston rod; a driving frame is arranged on a head piston rod; the axle tube is provided with a plastic pipe outer end sealing plate, a steel pipe outer end sealing plate, a plastic pipe outer sealing circle and a steel pipe outer sealing circle; the axle tube is provided with a first gas inlet, a first gas inlet one-way valve is arranged on the first gas inlet, and the outer wall of the axle tube is provided with a first gas pressure sensor; a steel-plastic adapter supported by the joint support frame is located between the limiting seat and the plugging cylinder; and the gas supply end of the gas supply pump is communicated with the inner part of the axle pipe via the gas supply pipe. The gas supply testing device has the beneficial effects that the overall structure is reasonable; positioning and clamping on the steel-plastic adapter are in place; sealing performance can be ensured, and the steel-plastic adapter can not be clamped damaged; and a sealing structure which can be adaptively adjusted is arranged, and the sealing effects in the case of high gas pressure detection can be enhanced.

Description

technical field [0001] The invention belongs to the technical field of tightness testing of pipe joints, and in particular relates to a gas supply testing device. Background technique [0002] Steel-plastic conversion joints, also known as PE steel-plastic conversion joints, have been widely used in current production and life. For example, steel-plastic conversion joints are widely used in gas and natural gas transportation pipelines (most of the external gas pipelines are PE Pipes are mostly steel pipes when entering the room, and steel-plastic conversion joints are required during the transfer process). The steel-plastic conversion joint itself consists of a steel pipe section (a section of steel pipe) and a plastic pipe section (usually a section of PE pipe). One end of the steel pipe section is docked with one end of the plastic pipe section to form a connection section. The connection section is usually clamped by one end of the steel pipe section and one end of the pl...

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Problems solved by technology

[0004] The above-mentioned test method has the following disadvantages: 1. The operation process is complicated, and the weight of the frame is relatively heavy. It is necessary to immerse the frame in water with the help of external equipment, and the installation of the steel-plastic conversion joint is also relatively troublesome; When the steel-plastic conversion joint is sealed and the sealing ring is placed outside the two ends of the steel-plastic conversion joint, and the hydraulic cylinder (or air cylinder) is used to clamp the two ends of the steel-plastic conversion joint for sealing, the strength of both is difficult to control. If the pressing or clamping force is not enough, the seal at the end of the steel-plastic conversion joint may not be reliable, which will affect the accuracy of the test and cause misjudgment of quality. If the pressing or clamping force is excessive, it may cause The deformation of the steel-plastic conversion joint causes the end face (pipe end) of the steel-plastic conversion joint to be uneven, which makes it impossible to form a seal between the steel-plastic conversion joint and the pressure plate, resulting in misjudgment of quality. Excessive force may also directly damage the steel-plastic conversion joint

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