Blocking detection device

Abstract

The invention discloses a blocking detection device which comprises a mainframe base, an air feed pump, a blocking cylinder, a compression cylinder, a shaft pipe, a limiting base and a connector supporting frame. A compression piston rod is provided with a positioning plate, a seal head piston rod is provided with a driving frame, and the shaft pipe is provided with a plastic pipe outer end seal plate, a steel pipe outer end seal plate, a plastic pipe outer seal ring and a steel pipe outer seal ring. The shaft pipe is provided with a first air inlet which is provided with a first air inlet check valve, the outer wall of the shaft pipe is provided with a first air pressure sensor, a plastics-steel conversion connector supported by the connector supporting frame is positioned between the limiting base and the blocking cylinder, and the air feed end of the air feed pump is communicated with the inside of the shaft pipe through an air feed pipe. The blocking detection device has the advantages that the blocking detection device is reasonable in integral structure and enables the positioning and clamping of the plastics-steel conversion connector to be in place, the sealing performance can be guaranteed, and the plastics-steel conversion connector is not damaged; and the blocking detection device has an adaptive control sealing structure and can strength sealing effects during the high air pressure detection.

Description

technical field [0001] The invention belongs to the technical field of tightness testing of pipe joints, in particular to a plugging detection 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 plastic pipe s...

AI Technical Summary

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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