Downstream under-pressure automatic closing pressure regulator
An automatic shut-off and pressure regulator technology, applied in the direction of valve details, safety valves, balance valves, etc., can solve the hidden dangers of users in downstream pipeline maintenance operations, and the failure to automatically close the main valve pilot in time, etc., to achieve safety in maintenance operations High performance, simple structure and stable operation
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[0016] Embodiments of the present invention are further described below in conjunction with the accompanying drawings:
[0017]An under-pressure automatic closing pressure regulator behind the valve, which is mainly composed of a main valve 3 installed between the input pipe 6 in front of the valve and the output pipe 23 behind the valve, the main regulating diaphragm box 21 equipped with the main valve 3, and the regulator. The pressure pilot ZH, the rear pressure controller HK, the front pressure signal pipe 13, the signal conduit 15, the signal output pipe 14, the signal return pipe 20, the main adjustment rear pressure pipe 19 and the command rear pressure pipe 16 are formed. The main valve 3 is equipped with a main regulating valve stem 9 , a main regulating spring 2 , a valve sleeve 7 , and a valve core 8 to form a pressure regulating structure for regulating the opening degree of the main valve port 22 . The main adjustment diaphragm 11 is equipped in the main adjustmen...
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