Underground fuel gas pressure adjusting device

Abstract

An underground fuel gas pressure adjusting device comprises a blow-down pipe, an upper box, a lower box and a pressure adjusting core, wherein the upper box, the lower box and the pressure adjusting core are arranged under the ground. A plurality of interfaces are welded to the blow-down pipe. The upper box and the lower box are assembled into one. A diffuse interface and a check valve interface are welded around the upper box and connected with an interface in a diffuse pipe through a metal hose. The lower box comprises an inlet valve, an inlet pipe, an outlet pipe, an outlet valve, a pressure adjusting device, a filtration cutting-off device, a differential gauge, an inlet blow-down valve, an outlet blow-down valve, an inlet pressure gauge and an outlet pressure gauge. The inlet valve isconnected with one end of the inlet pipe, the other end of the inlet pipe is welded to the lower box, the outlet valve is connected with one end of the outlet pipe, the other end of the outlet pipe is welded to the lower box, and the pressure adjusting device and the filtration cutting-off device are correspondingly and independently installed in the lower box. The underground fuel gas pressure adjusting device is compact in structure and safe and reliable in using, and fuel gas pressure adjusting and stabilizing, parameter display and overpressure diffuse cutting-off can be achieved.

Description

Technical field: [0001] The invention belongs to equipment used in a gas transmission and distribution system, in particular to an underground gas pressure regulating device. Background technique: [0002] Most of the domestic traditional gas pressure regulating boxes are arranged on the ground, and the inside of the box is connected with valves, filters, and pressure regulators in sequence through pipelines. This filter box has the following defects: 1. It occupies a large space and is complicated to maintain. 2. The ground inside some cabinets is damp and poorly ventilated, and the equipment used is easily corroded, posing potential safety hazards. 3. Most of the metering boxes are arranged next to the road, which is easy to block the sight, and the uncivilized behavior of some passers-by makes the surface of the box obviously scratched and stained, which affects the appearance. 4. There is a risk of gas leakage caused by being hit by a vehicle. 5. The box is easy to be...

AI Technical Summary

Problems solved by technology

This filter box has the following defects: 1. It takes up a lot of space and is complicated to maintain

2. The ground inside some cabinets is damp and poorly ventilated, and the equipment used is easily corroded, posing potential safety hazards

3. Most of the metering boxes are arranged next to the road, which is easy to block the line of sight, and the uncivilized behavior of some passers-by makes the surface of the box obviously scratched and stained, which affects the appearance

4. There is a risk of gas leakage caused by being hit by a vehicle

5. The box is easy to be opened, and there is a risk of illegally modifying parameters and cutting off the gas supply

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