Emergency cut-off valve at bottom of built-in tank in low-temperature liquid storage tank
A low-temperature liquid, shut-off valve technology, applied in the direction of lift valve, valve details, valve device, etc., can solve problems such as safety hazards, liquid leakage, safety accidents, etc., achieve reasonable structure, reduce valve opening torque, and zero leakage sealing performance Effect
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[0018] Embodiment: The built-in tank bottom emergency shut-off valve of the present invention is a special valve for large cryogenic liquid storage tanks. The valve is divided into two parts: main valve and drive.
[0019] The main valve part 1 is mainly composed of bottom plate, valve seat, guide frame, large and small valve discs, valve disc cover, guide frame cover, guide rod, etc. (see figure 2 ). The small disc and the large disc form a sealing pair, and the large disc and the valve seat form a sealing pair. The small disc can move up and down in the large disc and is guided by a guide rod; the large disc can move up and down in the guide frame. sports.
[0020] The driving part 2 is mainly composed of an actuator (with a spring inside), a piston rod, a transmission pin, an upper valve stem, a guide block, a connecting pipe, a protective cover, and an air inlet and outlet, etc. (see image 3 ). The bottom plate in the main valve part is welded to the bottom of the liq...
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