Anti-sediment backwashing back pressure valve

Abstract

The invention discloses an anti-sediment backwashing back pressure valve. The valve comprises an upper valve body, a lower valve body, pressure adjusting equipment, sealing equipment, a piston, a valve rod, a sealing seat and an adapter, and is characterized in that: a valve rod guide sleeve with a filter core is arranged below a piston cylinder cavity consisting of the upper valve body, the lower valve body and the piston; the upper end of the valve rod guide sleeve is provided with a ventilation through hole; the lower part of the inner bore of the valve rod guide sleeve is provided with a sweeping ring; the valve rod has a gas-pin-shaped structure; a vertical hole with a proper length is drilled on the end face of the valve rod; a transverse hole which is communicated with the verticalhole is drilled on the side face of the valve rod; and the upper part of the piston cylinder cavity is provided with a backwashing passage. Since the anti-sediment backwashing back pressure valve hasbackwashing functions, complex work of manually disassembling and cleaning the back pressure valve can be saved, the probability of damaging the back pressure valve is eliminated, and the working efficiency of the back pressure valve is improved.

Description

technical field [0001] The back pressure valve with the structure of the present invention relates to a valve that can automatically control the pressure in front of the valve among valve products. technical background [0002] At present, in many occasions, such as petrochemical industry, chemical reaction, supercritical high-pressure sewage treatment, automatic control, etc., all need to be realized under a certain pressure. Therefore, in this process structure, a valve that can automatically adjust the pressure at the front end must be installed at the end. This is the back pressure valve. Its working principle is: by rotating the pressure regulating device clockwise, the adjusting nut moves downward, compressing the pressure regulating spring, so that the spring generates a certain thrust, that is, the set pressure, and the force generated by the pressure regulating spring is transmitted to the piston, forcing The piston drives the spool to move downwards, and closes t...

AI Technical Summary

Problems solved by technology

Therefore, the structure of the existing back pressure valve simply cannot meet the requirements of the aforementioned severe working conditions.

The reason is: this kind of high-concentration liquid containing sediment particles will quickly cause serious wear and tear on the piston cylinder wall, piston and seal, and form an external leakage, so the pressure in front of the valve cannot be controlled.

Second, sediment particles are also very easy to jam the piston, making the back pressure valve unable to control the pressure in front of the valve, which is a major problem for related companies

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