Non-icing high pressure differential fully balanced pressure regulator

Abstract

The invention relates to gas medium non-ice-blockage pressure regulators, in particular to a non-ice-blockage high-pressure-difference full-balance type pressure regulator. The non-ice-blockage high-pressure-difference full-balance type pressure regulator comprises a main valve, a valve spring and a pressure regulating valve which is located above a main valve body, an air inlet cavity and an air outlet cavity of the main valve are communicated with a main valve cavity, the inner wall of the main valve is provided with an anti-explosion electric heater, a main valve base is arranged between the main valve cavity and the air inlet cavity, and a valve clack is arranged below the main valve base and is fixed to the lower portion of a pressure regulating valve rod. The bottom of a piston of the pressure regulating valve is fixed to the top end of the pressure regulating valve rod, and the top of the piston is fixed at the bottom of a three-way and two-position valve rod. A valve cavity of the pressure regulating valve is communicated with the air inlet cavity of the main valve through a connecting pipe, and the connecting pipe is provided with a guide air pressure regulating valve. A pressure regulating piston of the guide air pressure regulating valve is controlled to be opened and closed through a pressure regulating screw rod. The non-ice-blockage high-pressure-difference full-balance type pressure regulator with the structure has the advantages that the safety is improved, the labor intensity of workers is reduced, and the application range is enlarged.

Description

technical field [0001] The invention relates to a gas medium non-ice-blocking pressure regulating device, in particular to a non-ice-blocking high-pressure differential fully balanced pressure regulator which improves safety, reduces labor intensity of workers and expands the scope of use. Background technique [0002] In the gas delivery process, the high-pressure gas needs to be reduced to a low pressure. In this process, a large amount of heat-absorbing physical phenomena will be generated. Usually, ice blockage will occur at the throttle of the regulator, causing the airflow to fail to pass normally. Serious Even complete blockage causes production stoppage. The non-ice-blocking high-pressure differential pressure regulator disclosed in Chinese patent 200610054437.9 effectively solves the problem of ice-blocking, but in the process of using it, when adjusting the pressure through the pressure-regulating screw described in its knot, the worker needs to take a large wrench...

AI Technical Summary

Problems solved by technology

[0002] In the gas delivery process, the high-pressure gas needs to be reduced to a low pressure. In this process, a large amount of heat-absorbing physical phenomena will be generated. Usually, ice blockage will occur at the throttle of the regulator, causing the airflow to fail to pass normally. Serious Even complete blockage causes production stoppage

The non-ice-blocking high-pressure differential pressure regulator disclosed in Chinese patent 200610054437.9 effectively solves the problem of ice-blocking, but in the process of using it, when adjusting the pressure through the pressure-regulating screw described in its knot, the worker needs to take a large wrench, which is very laborious. The reason for this phenomenon is that the high-pressure air source at the intake end pushes the valve clack upwards. The worker adjusts the pressure by pushing the piston through the pressure regulating screw, and the piston then pushes the valve stem integrated with the valve clack to move downward. , to drive the valve disc to move down, realize the decompressed gas is discharged from the gas outlet, and realize pressure regulation; in the process of pressure regulation, when the pressure of the upstream gas source is high, there is no problem in regulating and stabilizing the pressure, but when the upstream pressure is insufficient When the pressure is 60% of the initial pressure regulation, because it is a direct-acting type, the force to lift the valve disc is lower than the original pressure, which is not enough to balance with the force of the downward pressure regulating spring to maintain the initial opening of the valve disc If it is not adjusted in time, it will be out of control, and there will be a greater safety hazard. It can be seen that the safety of the non-ice-blocking high-pressure differential pressure regulator of this structure is low. Because of the low safety, it makes its The scope of use is small, and it is obviously impossible to use it with confidence for the air source whose air pressure decreases with the passage of pressure adjustment time

[0004] However, when the above-mentioned structure is decompressed and released to the gas transmission pipeline network by the CNG tank car, when the pressure in the upstream of the pipeline or (CNG tank car) drops by about 20% during the gas transmission process, it is necessary to turn the downward pressure height of the original pressure regulating screw. Otherwise, the air outlet pressure will become higher and higher, and if you don’t pay attention, you may lose control, damage downstream equipment, and even cause safety accidents

[0005] In summary, during the use of the high pressure differential pressure regulator without ice plugging in the prior art, the labor intensity of the workers is high, the safety is low, and the application range is small.

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