Continuous blow-off valve
A blowdown valve and valve seat technology, applied in the direction of lift valves, valve details, valve devices, etc., can solve problems such as maintenance and replacement difficulties, and achieve the effect of small sealing contact area, long service life, and easy maintenance and replacement
Pending Publication Date: 2019-09-24
黑龙江北方阀业有限责任公司 +1
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Problems solved by technology
[0005] In order to solve the technical problem that the existing blowdown valve is difficult to repair and replace due to the welding of the valve seat and the valve body, the invention provides a blowdown valve
Method used
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[0037] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some embodiments of the present invention, not all of them. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as there is no conflict with each other.
[0038] The blowdown valve provided by the present invention can be used for continuous blowdown of boiler steam drum, etc. figure 1 , figure 2 Shown is a blowdown valve in some embodiments according to the invention.
[0039] Such as figure 1 , figure 2 As shown, the blowdown valve of the present ...
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The invention relates to the technical field of shut-off valves, and particularly provides a blow-off valve. The blow-off valve comprises a valve body, a valve rod and a valve seat, wherein a cavity is formed in the valve body; a medium inlet which communicates with the cavity is formed in a side wall of the valve body; the valve rod is hermetically arranged at one end of the cavity, so that a medium outlet is formed in the other end of the cavity; the valve rod can slide in the axial direction of the cavity in a reciprocating manner; and the valve seat is detachably arranged in the cavity; and in a sliding process of the valve rod, the end, which is close to the medium outlet, of the valve rod is matched with the valve seat to adjust flow of the medium outlet. The blow-off valve is provided with the detachable valve seat, when damaged by cavitation and erosion, the valve seat is convenient to replace, the whole blow-off valve does not need to be cut, maintenance and replacement are facilitated, meanwhile, the valve seat is detachably connected with the valve body, requirements on welding materials are avoided, the valve seat can be made of a hard alloy material with high strength, and compared with a traditional blow-off valve, the blow-off valve is longer in service life, and is not easy to damage.
Description
technical field [0001] The invention relates to the technical field of shut-off valves, in particular to a blowdown valve. Background technique [0002] The continuous blowdown valve is often used in the continuous blowdown of the steam drum of the thermal power plant boiler to ensure the quality of the boiler feed water. The boiler steam drum is a mixture of supersaturated steam and water, the temperature reaches 300-500°C, and the pressure exceeds 20Mpa. Therefore, the working condition of the blowdown valve is the worst among all regulating, throttling and pressure reducing valves. [0003] Therefore, a reasonable design of the valve structure is very important for the blowdown valve. There are many kinds of blowdown valves in the prior art, such as multi-hole throttling control valves, right-angle multi-stage throttle valves, etc. It is prone to clogging and reduces the performance. The right-angle multi-stage plunger drain valve is difficult to overhaul due to the larg...
Claims
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IPC IPC(8): F16K1/38F16K1/42F16K1/32F16K25/04F16K25/00F16K41/02
CPCF16K1/38F16K1/42F16K1/32F16K25/04F16K25/005F16K41/02
Inventor 张乃波刘德鑫韩彦海卢泾杉王永峰
Owner 黑龙江北方阀业有限责任公司