Online replacement of pressure loss valve
A valve cover and valve body technology, which is applied to pump components, variable capacity pump components, and components of a pumping device for elastic fluids, etc., can solve the problem of increasing maintenance costs, inconvenient and flexible configuration, and inability to achieve multiple uses for one valve. and other problems to achieve the effect of reducing production and maintenance costs
Active Publication Date: 2017-02-22
WUZHONG ZHONGCHUANG VALVES
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Problems solved by technology
The valve has a good throttling effect, and its service life is higher than that of similar domestic products, but it still cannot solve the fundamental problem. After a long time of use, it will inevitably be cavitated and eroded. In order to achieve a better pressure-reducing effect, the valve is designed with a complex labyrinth. Runner, on the one hand, it increases the difficulty of processing, on the other hand, it also increases the maintenance cost - the entire valve cage needs to be replaced
[0006] In addition, the current similar valves need to design different types of valves according to different flow capacity requirements, and it is impossible to realize one valve with multiple functions, which is neither convenient for mass production nor flexible configuration in the later stage
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[0027] The meanings of the following terms used in this specification are:
[0028] "Sleeve side wall" refers to the outer wall of the sleeve parallel to the axis of the valve stem.
[0029] "Middle part of the sleeve" refers to the part corresponding to the insertion of the valve stem.
[0030] "Pressure loss head end" refers to the end facing the axis of the sleeve cavity.
[0031] Such as Figure 1~Figure 7 As shown, a valve for online replacement of pressure loss parts includes: valve body 1, valve cover 2, valve stem 3, sleeve 4, valve seat 5, flange 6, liquid inlet cylinder 81, liquid outlet cylinder 82, pressure loss 7 and stop block (not shown); wherein, the valve seat 5, the sleeve 4, and the valve cover 2 are located in the valve body cavity 11 from bottom to top in sequence, the valve seat 5 is a multi-stage cylinder that penetrates up and down, and the valve seat 5 The protruding part 51 extending outward through its side wall is fixed in the valve body cavity 1...
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An online replacement pressure loss part valve comprises a valve body, a valve cover, a valve rod, a sleeve, a pressure loss part and a stopped flow block. The sleeve is positioned in a valve body cavity, a space is reserved between the side wall of the sleeve and the inner wall of the valve body cavity at the sleeve, the space is communicated with a liquid inlet channel of the valve body, a vertical penetrating sleeve cavity is formed in the middle of the sleeve, the lower end of the sleeve cavity is communicated with a liquid outlet channel of the valve body, a plurality of penetrating pressure loss part cavities are formed between the side wall of the sleeve and the inner wall of the sleeve cavity and used for fixedly placing the pressure loss part and the stopped flow block, the tail end of the pressure loss part is communicated with the head end of the pressure loss part through a labyrinth channel, the shape and the size of the stopped flow block are matched with those of each pressure loss part cavity, the labyrinth channel is formed in the relatively independent pressure loss part, high-pressure difference is born by the pressure loss part, permanent scouring and gas etching are limited on the pressure loss part, and only the pressure loss part is replaced or maintained when damaged and needing replacement or maintenance.
Description
[0001] Technical field: [0002] The invention relates to the technical field of regulating valves, in particular to an online replacement valve for pressure loss parts. [0003] Background technique: [0004] Regulating valve is the most important link in automation control, its reliability and adjustment accuracy will affect the safety and quality of system automation operation. The recirculation valve of the feed water pump is one of several kinds of control valves with the worst operating conditions, because its installation position is between the outlet of the feed water pump and the condenser, the huge pressure difference between the two is borne by the valve, whether it is opened or closed Under normal conditions, the minimum flow rate of the recirculation system is always working under the high pressure difference. The service life of the recirculation valve of the feed water pump has been very short. There are two main reasons: 1. Erosion, at the throttle port of the ...
Claims
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IPC IPC(8): F04B53/10
Inventor 张耀辉郭风忠杨秉涧李新福杨硕李碧
Owner WUZHONG ZHONGCHUANG VALVES