Two-way gas pressure regulating station

Abstract

The invention provides a two-way gas pressure regulating station and belongs to the technical field of gas transportation and distribution facilities. The two-way gas pressure regulating station comprises a base, an upstream natural gas inlet pipe, a main filter, an auxiliary filter, a main pneumatic pressure regulating valve, an auxiliary pneumatic pressure regulating valve, a downstream natural gas transportation pipe, a main gas outlet pipe and an auxiliary gas outlet pipe, wherein the upstream natural gas inlet pipe is fixed to the base, one end of the upstream natural gas inlet pipe is connected with an upstream natural gas pipeline, a branch pipe is fixed at the other end of the upstream natural gas inlet pipe, a branch pipe right gas outlet manually operated valve is arranged at the right end of the branch pipe, and a branch pipe left gas outlet manually operated valve is arranged at the left end of the branch pipe; the main filter, the auxiliary filter, the main pneumatic pressure regulating valve and the auxiliary pneumatic pressure regulating valve are supported on the base; a pipeline of the downstream natural gas transportation pipe is provided with a bypass pipe, a downstream natural gas transportation pipe control valve is arranged at the rear end of the downstream natural gas transportation pipe, and a bypass pipe control valve is arranged at the rear end of the bypass pipe. The two-way gas pressure regulating station is characterized in that a pipeline of a main gas outlet pipe is provided with a main gas outlet pipe debugging valve and a main gas outlet pipe pressure gage, and the main filter comprises a cylinder, a cylinder cover, a filter element fixing base, a filter element, a filter element gland and a filter element locking rod. The filtration effect is good, the workload of checking upstream and downstream differential pressure changes is relieved, and use safety of downstream users is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of gas transmission and distribution facilities, and in particular relates to a two-way gas pressure regulating station. Background technique [0002] The function of the gas pressure regulating station is a special facility for stabilizing the pressure in the gas transmission and distribution pipeline network, and can be divided into high and medium pressure regulating stations, high and low pressure regulating stations, medium and low pressure regulating stations, etc. according to the pressure of the inlet and outlet pipelines. The technical information of various gas pressure regulating stations can be seen in the published Chinese patent documents, such as CN103912704B (gas pressure regulating device and pressure regulating method) and CN105605425A (a kind of gas pressure regulating metering station control system). The aforementioned patents that are not limited to examples involve single-way pressure ...

AI Technical Summary

Problems solved by technology

[0003] As known in the industry, the filter for filtering natural gas from upstream is an important part of the structural system of the entire gas pressure regulating station. Its function is to filter out impurities in natural gas, especially suspended solids. Therefore, the structure of the filter Whether it is reasonable or not will not only affect the pressure regulating effect of the pressure regulating station, but also have a corresponding impact on the gas quality of downstream users. However, it is not limited to the above-mentioned patents that do not give the inspiration of the specific structure of the filter; due to the aforementioned CN2645107Y And the pneumatic pressure regulating valve in CN104865983Y responds to the set pressure difference between the air inlet and outlet pipelines, for example, when the pressure difference between the air inlet and outlet pipelines exceeds the set value, the structural system of the pneumatic pressure regulating valve is cut off The valve is cut off to ensure the safety of the downstream pipeline. However, when the working condition of the filter becomes worse, such as the clogging degree of the filter element of the filter increases, since the filter is located between the intake pipeline and the pneumatic pressure regulating valve, the air inlet and outlet pipelines The pressure difference between them will also exceed the set value and the gas path will be cut off by the aforementioned cut-off valve. In this case, it is generally considered that there are two reasons; Therefore, the investigation needs to take into account the above two factors, which increases the workload of analysis and investigation. The reason is that it is impossible for the facility management and maintenance personnel to accurately understand the working conditions of the filter itself, because if the facility management and maintenance personnel can intuitively understand the filter. If the filter element is clogged, the workload of the aforementioned analysis and investigation can be significantly reduced; since the outlet pipe valve on the outlet pipe only serves as an on-off function, it is not easy to debug

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