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High-pressure-difference multistage sleeve adjustment valve

A sleeve regulating valve, high pressure difference technology, applied in the direction of valve lift, valve details, valve device, etc., can solve problems such as unreasonable flow channel setting, shortened valve service life, flashing, cavitation, etc., to avoid flashing and cavitation, improve service life, reduce vibration and noise

Inactive Publication Date: 2015-04-08
HARBIN HBC VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the sleeve-type control valves used in high-pressure differential conditions are not equipped with effective throttling and expansion space, or the flow channel is not set properly, failing to achieve the expected throttling, decompression, and noise reduction effects, resulting in flashing, Cavitation phenomenon, reducing the service life of the valve

Method used

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  • High-pressure-difference multistage sleeve adjustment valve
  • High-pressure-difference multistage sleeve adjustment valve

Examples

Experimental program
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Embodiment Construction

[0012] exist figure 1 In the shown embodiment, the valve cover 6 presses the sleeve assembly 4, and then presses the valve seat 2 on the valve body 1, and the valve stem 5 drives the valve disc 3 to move in the sleeve assembly 4 to adjust the flow area of ​​the valve. , to achieve the adjustment function of the valve.

[0013] Such as figure 2 As shown, the sleeve assembly 4 is composed of three or more layers of sleeves 9 cooperating and nesting, and circular pins 8 are used for positioning between the sleeves. Each layer of sleeves 9 is provided with the same number of circular orifices, and the positions of the orifices correspond to each other. The throttling holes of adjacent sleeves are staggered and overlapped along the same direction of the circumference to form a medium flow channel with throttling and capacity expansion step by step.

[0014] The orifice disperses a single strand of high-energy medium into multiple strands of small-energy medium to reduce speed a...

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Abstract

The invention discloses a high-pressure-difference multistage sleeve adjustment valve, and belongs to the field of thermal power and nuclear power valves. The high-pressure-difference multistage sleeve adjustment valve is mounted on a steam-water system pipeline of a thermal power and nuclear power unit and is important equipment for adjusting flow, pressure and temperature of a medium. The high-pressure-difference multistage sleeve adjustment valve consists of a valve body, a valve seat, a sleeve assembly, a valve rod, a valve clack, a valve cover, bolts and the like, wherein the valve cover presses the sleeve assembly through the bolts, and the valve seat is pressed on the valve body; the valve rod drives the valve clack to move in the sleeve assembly, so that the circulating area of the valve is adjusted; the sleeve assembly consists of multiple stages of sleeves, and an equal quantity of throttling holes are formed in each layer of the sleeve, and in one-to-one correspondence in position; the throttling holes in the adjacent sleeves are staggered and stacked; the medium flows through the stacked areas for throttling pressure reduction and then enters the whole throttling hole space for volume expansion, so that gradual pressure reduction is effectively realized. According to the high-pressure-difference multistage sleeve adjustment valve, flash evaporation and cavitation are effectively avoided, so that the service life of the adjustment valve is prolonged, and the noise of the valve is reduced.

Description

technical field [0001] The invention relates to a high pressure differential multistage sleeve regulating valve, which belongs to the field of thermal power and nuclear power valves. Background technique [0002] The high-pressure differential multi-stage sleeve regulating valve is installed in the steam-water system pipeline of thermal power and nuclear power units, and is an important equipment for regulating the flow, pressure and temperature of the medium. [0003] At present, the sleeve-type control valves used in high-pressure differential conditions are not equipped with effective throttling and expansion space, or the flow channel is not set properly, failing to achieve the expected throttling, decompression, and noise reduction effects, resulting in flashing, Cavitation phenomenon reduces the service life of the valve. [0004] The invention adopts the dislocation arrangement of the throttle holes of the multi-layer sleeve to reduce the pressure and noise, and effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/00F16K1/36F16K47/02
CPCF16K1/00F16K1/36F16K47/02
Inventor 娄冬梅万胜军郑红丽
Owner HARBIN HBC VALVE