A pressure relief valve includes a bonnet threadedly secured to a pressure vessel, a floating device in the pressure vessel, a relief assembly, an actuator secured to the bonnet and communicating with the bonnet, a biasing element put on a stem and biased between a tubular member and a conic member,
A pressure relief valve includes a bonnet threadedly secured to a pressure vessel, a floating device in the pressure vessel, a relief assembly, an actuator secured to the bonnet and communicating with the bonnet, a biasing element put on a stem and biased between a tubular member and a conic member, and a safety valve. The hollow cylinder is slidable in a space defined by the tubular member and a hollow, cylindrical actuating member. The stem is slidably disposed in the tubular member. Pressurized fluid enters a conic opening via an inlet connector, a first channel, a Venturi tube, and a second channel to push the tubular member so as to disengage a latch from a hook to release the pressurized fluid.
대표청구항▼
1. A pressure relief valve for a pressure vessel comprising: a relief assembly comprising a stem and a conic member at one end of the stem;a bonnet threadedly secured to the pressure vessel and comprising first, second, and third channels, and communicating with each other, the first channel being f
1. A pressure relief valve for a pressure vessel comprising: a relief assembly comprising a stem and a conic member at one end of the stem;a bonnet threadedly secured to the pressure vessel and comprising first, second, and third channels, and communicating with each other, the first channel being fluidly attached to an inlet connector, the second channel being aligned with the first channel, the third channel having one end communicating with one end of the second channel proximate to the first channel and an other end extending into the pressure vessel, a conic opening extending out of an orifice of the second channel distal the first channel, a Venturi tube disposed at a joining portion of the first channel and the second channel proximate to one end of the third channel, and a handle;a floating device comprising a float, a hollow guide member secured to the bonnet, and a tapered plug secured to the float and disposed through the guide member into the third channel;an actuator comprising a mounting member secured to the bonnet with the conic opening disposed therein, a hollow cylinder extending outward from the mounting member and communicating with the conic opening, the hollow cylinder including two opposite projections on an outer surface, a spring biased lever pivotably secured to the mounting member and including a hook, a hollow, cylindrical actuating member including two opposite slots on a perimetric surface for receipt of the projections so as to join the mounting member and the hollow, cylindrical actuating member, a plurality of vent holes on an end surface distal the bonnet, a latch on a top of an other end facing the bonnet, the latch being releasably secured to the hook, and a tubular member concentrically extending inward from the vent holes, and a biasing member put on the tubular member and biased between the vent holes and the hollow cylinder;a biasing element put on the stem and biased between the tubular member and the conic member; anda safety valve disposed on a top of the bonnet and in communication with the pressure vessel;wherein the hollow cylinder is slidable in a space defined by the tubular member and the hollow, cylindrical actuating member;wherein the stem is slidably, partially disposed in the tubular member;wherein the projections are slidable in the slots;wherein pressurized fluid enters the conic opening via the inlet connector, the first channel, the Venturi tube, and the second channel to push the tubular member so as to disengage the latch from the hook to release the pressurized fluid via the vent holes after passing the hollow cylinder, the hollow, cylindrical actuating member, and the tubular member; and the pressurized fluid in the pressure vessel flows to the second channel via the hollow guide member and the third channel, thereby creating a negative pressure in the pressure vessel; andwherein after the disengagement of the latch from the hook, the latch and the hook are fastened together by pushing the actuating member toward the bonnet, thereby blocking the conic opening to divert the pressurized fluid into the pressure vessel via the third channel and the guide member.
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