Natural gas pipeline sampling valve

Abstract

The invention discloses a natural gas pipeline sampling valve. The valve comprises a baffle, a connecting frame, a sampler and a purification box, the purification box is located at the lower end of the baffle and fixedly connected with the baffle, the connecting frame is located on the inner surface of the baffle and fixedly connected with the baffle, the sampler is located in the baffle and comprises a first sampling pipe, a second sampling pipe, a first piston and a second piston, the first piston is located in the first sampling pipe, the second piston is located in the second sampling pipe, the lower ends of the first piston and the second piston are fixedly connected with rubber plates, and the outer circular surfaces of the rubber plates are closely attached to the inner wall of the first sampling pipe. The valve has the advantages that the natural gas sampling accuracy of the sampler is guaranteed, the natural gas sampling efficiency is further guaranteed, the risk of external influence during sampling is reduced, the sampling stability of detection personnel is guaranteed, and the accuracy of a detection result is guaranteed.

Description

technical field [0001] The invention relates to the technical field of natural gas detection, in particular to a natural gas pipeline sampling valve. Background technique [0002] Natural gas is a gaseous fossil fuel mainly composed of methane. It mainly exists in oil fields and natural gas fields, and a small amount comes out of coal seams. Like crude oil, natural gas is also buried in underground closed geological structures, some of which are stored in the same layer as crude oil, and some exist alone. [0003] Existing patent (notification number: CN201920840429.X) a natural gas leakage alarm device, including: an annular sleeve composed of an upper ring sleeve and a lower ring sleeve, one side of the upper ring sleeve and the lower ring sleeve are hinged, and the other side There is a boss at the junction of the boss, and there is a bolt hole on the boss, and the locking bolt penetrates the bolt hole to seal the upper ring sleeve and the lower ring sleeve fixed sleeve...

AI Technical Summary

Problems solved by technology

[0005] 1. The natural gas pipeline sampling valve is a detection device installed at the connection point of the natural gas pipeline to facilitate sampling and testing of the natural gas in the pipeline at any time. The use of the connection point will reduce the sealing performance, which will lead to air leakage, especially when using the sampling valve in the natural gas pipeline in the community, special attention needs to be paid, the existing natural gas pipeline in the community is usually in the basement , the inspectors will not always pay attention to it, which will easily lead to dust on the surface of the sampling valve on the pipeline, and the dust will enter the inlet of the sampler pipeline on the sampling valve. The impurities in the pipeline are removed before sampling, which leads to a decrease in the efficiency of sampling detection, and timely exhausting cannot ensure that the impurities in the pipeline are cleared. If the impurities enter the sample during sampling, it will lead to the detection decreased accuracy;

[0006] 2. In the existing sampling inspection of natural gas, there is often a phenomenon of air leakage at the connection port, especially in a confined space such as the basement of the community. If it cannot be found in time, it will cause the sampling valve to be located There is accumulation of natural gas in the space, causing safety hazards, and for the maintenance personnel, entering such an environment will cause the staff to inhale a large amount of natural gas, which will endanger the life safety of the maintenance personnel and reduce the Safety in use of sampling valves

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