Cutoff and pressure regulation integrated high-precision gas pressure regulator

Abstract

The invention relates to a cutoff and pressure regulation integrated high-precision gas pressure regulator. A valve body is provided with an air inlet and an air outlet; upper part inside the valve body is provided with a valve core; a connecting shaft is arranged inside the valve core; the bottom of the connecting shaft is fixedly connected with a valve pad; a clearance between the valve pad andthe valve core forms a valve opening; a sliding sleeve is arranged outside the valve core; the sliding sleeve is externally sleeved with a cutoff valve pad; the upper end of the sliding sleeve is provided with a compression spring; a main coating is provided with a pressure plate; the pressure plate is provided with a main spring and an adjusting screw rod; a cutoff device is fixedly connected with the valve body through a connecting sleeve; a hook arranged in the cutoff device is used for hooking the lower part of an outwards-protruding part of the sliding sleeve; the balance of the sliding sleeve can be maintained under the effects of the compression spring and the hook; the cutoff device communicates with downstream gas; the hook is separated from the sliding sleeve when the pressure ofthe downstream gas reaches a set value; and the cutoff valve pad moves downwards to seal the valve core. The cutoff and pressure regulation integrated high-precision gas pressure regulator provided by the invention ingeniously realizes the cutoff function of the gas pressure regulator and improves the shutoff pressure precision of the pressure regulator.

Description

technical field [0001] The invention relates to a high-precision gas pressure regulator integrated with cut-off and pressure regulation, and belongs to the technical field of gas pressure regulators. Background technique [0002] The gas pressure regulator is the key equipment in the gas transmission and distribution system, which is suitable for occasions where the gas needs to be adjusted and stabilized. The main function of the pressure regulator is to automatically adjust the gas outlet pressure to stabilize it in a certain pressure range to meet the needs of customers. When the downstream flow increases, the valve pad moves away from the valve core, increasing the valve opening, and the flow increases; when the downstream flow decreases or reaches zero, the valve pad moves closer to the valve core, reducing or closing the valve opening, and the flow decreases or zero. During the entire pressure regulation process, the downstream pressure is stable in a certain pressur...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is: in the existing gas pressure regulator, when the outlet flow rate is zero, the sealing surface of the valve core and the valve pad will not fit well, which will cause the closing pressure to rise; The film is damaged, and the inlet pressure of the regulator increases and directly enters the downstream; or due to the large fluctuation of the outlet pressure, the peak value of the fluctuation exceeds the user's safety pressure limit value, which is likely to cause safety accidents to downstream users

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