Natural gas inlet filter device

Abstract

The invention discloses a natural gas inlet filter device. The natural gas inlet filter device comprises a filter cylinder and a filter element vertically arranged in the filter cylinder, wherein the filter cylinder is provided with an inlet channel communicating with the outside of the filter element and an outlet channel communicating with the inside of the filter element; the middle of the filter element is provided with a fixing screw rod vertically arranged; the filter element is fixedly connected with the top of the outlet channel through the fixing screw rod; the top of the filter element is provided with a positioning seat compacting the filter element downwards; an annular sheet capable of vertically moving along the filter cylinder under the action of the air pressure and a cushion chamber communicating with the filter cylinder are arranged in the filter cylinder; a piston and a piston spring for resetting the piston to the opening of the cushion chamber are arranged in the cushion chamber; and a spacing pin for releasing the spacing of the piston and the cushion chamber when the annular sheet moves upwards is arranged in the filter cylinder. The invention aims to provide a natural gas inlet filter device which effectively prevents a filter element from being damaged.

Description

technical field [0001] The invention belongs to the field of natural gas systems, in particular to a natural gas inlet filtering device. Background technique [0002] At present, the filter in the natural gas system is usually composed of a filter cartridge and a filter element. The filter element is located in the filter cartridge to filter the incoming natural gas and remove impurity particles in the natural gas. Such as the Chinese patent announcement number: CN104289046, discloses a kind of natural gas filter, comprises valve body, bonnet, inlet pipe and outlet pipe, and described inlet pipe is " L " shape, and outlet pipe communicates with the inner chamber of valve body, enters There is a filter element fixing rod in the air pipe, and the filter element is fixed on the top of the intake pipe through the filter element fixing rod; there is a dust connection plate in the valve body, and the dust connection plate is sleeved on the intake pipe. The bottom of the valve bod...

AI Technical Summary

Problems solved by technology

Due to the change of the internal pressure of the filter, the pressure at the inlet is generally greater than the pressure at the outlet. When the natural gas passes through the filter element, the pressure difference makes the filter element deflect. When the pressure fluctuates, the filter element swings. Falling inside, causing damage to the inner wall of the filter cartridge

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