A natural gas pipeline sampling valve

Abstract

The invention discloses a natural gas pipeline sampling valve, comprising a baffle plate, a connecting frame, a sampler and a purification box. The purification box is located at the lower end of the baffle plate and is fixedly connected with the baffle plate, and the connecting frame is located at the lower end of the baffle plate. The inner surface is fixedly connected with the baffle, the sampler is located inside the baffle, and the sampler includes a first sampling tube, a second sampling tube, a first piston, and a second piston, and the first piston is located in the first sampling tube. Inside the sampling tube, the second piston is located inside the second sampling tube, the lower ends of the first and second pistons are fixedly connected with a rubber plate, and the outer circular surface of the rubber plate is connected to the first sampling tube. The inner wall is snug. The invention ensures the accuracy of the natural gas sampling by the sampler, thereby guarantees the natural gas sampling efficiency, reduces the risk of external influence during sampling, ensures the stability of sampling by the inspectors, and ensures the accuracy of the inspection results.

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 is mainly found in oil and gas fields, and a small amount in coal seams. Natural gas is also buried in closed underground geological structures like crude oil. Some are stored in the same layer as crude oil, and some exist alone. [0003] Existing patent (announcement number: CN201920840429.X) is a natural gas leakage alarm device, comprising: 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 is hinged, and the other side is hinged. There is a boss at the connection of the upper and lower rings, and the boss is provided with a bolt hole. The locking bolt passes through the bolt hole to seal the upper ring sleeve and the lower ring sleeve fixed s...

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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