Polyethylene gas valve detection device

Abstract

The invention relates to a polyethylene (PE) gas valve detection device which is used for detecting the air-tightness and torque of finished products after PE gas ball valve assembly, and belongs to the field of PE gas valve production and quality inspection. According to the test requirements, a valve sealing mechanism cannot produce axial force, and the test torque is increased gradually. Most current detection devices cannot meet the requirements. In order to solve the technical defects of the existing detection devices, the invention discloses a novel PE valve air-tightness and operation torque detection device. The device has the following advantages: a clamp produces no axial force after valve clamping, and no damage is caused to the body of a valve after the completion of test; the torque applied to a valve is increased flexibly and can be controlled linearly; and no water tank is designed, the size of the device is reduced drastically, and the efficiency of test valve clamping is improved. Compared with similar devices, the PE gas valve detection device has obvious technological advancement and economic practicability, has obvious advantage in the production of valves, and has a very good economic effect.

Description

technical field [0001] The present invention relates to a polyethylene (PE) gas valve (hereinafter referred to as valve) detection equipment, in particular to a polyethylene gas ball valve assembled finished product sealing and torque detection equipment, belonging to polyethylene gas valve Production and quality inspection field. Background technique [0002] In recent years, with the rapid development of polymer material technology, the application fields of polymer materials have become more and more extensive, especially plastic pipe products, because of their advantages of light weight, simple and reliable production process and corrosion resistance, many fields have replaced Steel products. At the same time, the production and application of buried polyethylene gas pipelines, fittings and valves has also achieved rapid development. [0003] In 2008, my country issued the national standard "GB15558.3 ​​Buried Polyethylene (PE) Pipeline System Part 3 Valves for Gas" (h...

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Problems solved by technology

[0005] 1. The "Standard" requires that the sealing device should not produce axial external force on the valve. The current testing equipment basically cannot meet this requirement. The sealing mechanism and fixture of the equipment will produce different degrees of axial force on the valve after the valve is clamped. external force;

[0006] 2. The clamping mechanism and sealing method of the testing equipment are likely to cause surface damage to the valve, leaving scratches and affecting the appearance;

[0007] 3. The "Standard" requires that during the torque test, the applied torque is gradually increased until the valve is fully opened, but the existing testing equipment basically does not have this design, and the slightly better equipment can set a maximum predetermined value, but the torque cannot be achieved gradually increase;

[0008] 4. In order to observe the leakage of the valve, it is generally necessary to sink the valve into the water tank. The equipment is bulky and the operation efficiency is low.

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