A kind of airtight quality inspection equipment

Abstract

The present invention discloses a gas tightness quality detection device. The gas tightness quality detection device comprises a host base, an air feed pump, a blocking cylinder, a compaction cylinder, an axle tube, a spacing base and a joint support frame. The compaction piston rod is provided with a location plate, and an end socket piston rod is provided with a driving rack; the axle tube is provided with a plastic pipe external end blanking plate, a steel pipe external end blanking plate, a plastic pipe external sealing ring and a steel pipe external sealing ring; the axle tube is provided with an air inlet, and the air inlet is provided with a first inlet one-way valve; the outer wall of the axle tube is provided with a first gas pressure sensor, a steel-plastic conversion connector supported by the joint support rack is located between the spacing base and the blocking cylinder, and the air feed end of the air feed pump communicates with the interior of the axle tube through an air supply pipe. The gas tightness quality detection device is reasonable in the integrated structure, the location and the clamping of the steel-plastic conversion connector are in place, the sealing is guaranteed without damaging the steel-plastic conversion connector, and the gas tightness quality detection device has a adaptively regulated sealing structure to reinforce the sealing effect of the high pressure detection.

Description

technical field [0001] The invention belongs to the technical field of tightness testing of pipe joints, and in particular relates to airtight quality testing equipment. 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...

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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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