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Anti-cavitation pressure-reducing laminated cage

An anti-cavitation, lamination technology, applied in valve details, valve device, valve device for absorbing fluid energy, etc., can solve problems such as valve cage cavitation damage, improve service life, facilitate assembly, and improve competitive advantage Effect

Active Publication Date: 2019-01-25
WUZHONG INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: in order to solve the problem that the valve in the prior art is prone to local flash cavitation phenomenon and cause cavitation damage to the valve cage under the high pressure difference working condition, a kind of high pressure difference working condition is now provided. The anti-cavitation step-down laminated valve cage with precise adjustment of the lower fluid, the valve cage adopts step-by-step distribution of pressure difference, which effectively avoids flash cavitation phenomenon in the part of the valve cage

Method used

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  • Anti-cavitation pressure-reducing laminated cage

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Such as Figure 1-8 As shown, an anti-cavitation step-down laminated valve cage includes a cage body 7 with a central through hole 8, a plurality of inlets are arranged on the outer surface of the valve cage body 7, and a plurality of outlets are provided on the inner surface of the central through hole 8, and the inlet There is a pressure-reducing channel 1 between the outlet and the outlet. The pressure-reducing channel 1 includes a diversion part 101 and a confluence part 102 that are alternately connected in series. When the fluids collide with each other to form high turbulent flow, the friction between the fluid and the fluid, and between the fluid and the inner wall of the decompression channel 1 will increase. Because each time the fluids merge, they will collide with each other to offset the impact of the fluid and consume the fluid. Therefore, the tortuous pressure-reducing channel 1 is formed by alternately connecting the shunting parts 101 and the merging pa...

Embodiment 2

[0045] Such as Figure 9 As shown, the difference between embodiment 2 and embodiment 1 is that an inner ring groove 6 is opened outward on the inner ring wall of the lamination 2, and the inner ring groove 6 is located on the upper surface of the lamination 2, and two adjacent laminations 2 The inner ring groove 6 between them is connected with the outlets of all pressure-reducing channels 1 between the two current laminations 2. After the fluid passes through the pressure-reducing channel 1, the inner ring groove 6 is connected to each other to ensure a smooth transition and continuous fluid regulation. sex.

Embodiment 3

[0047] Such as Figure 10 As shown, the difference between embodiment 3 and embodiment 2 is that: the bottom surface of the inner ring groove 6 is provided with an annular protrusion 601, and there is a gap between the outer surface of the annular protrusion 601 and the inner surface of the inner ring groove 6, and the annular protrusion 601 can block the scouring force of a part of the fluid on the lamination 2 and improve the service life of the lamination 2 .

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Abstract

A cavitation-resistant laminated depressurization valve cage comprises a valve cage body (7) with a central through hole (8). An outer surface of the valve cage body is provided with multiple inlets. An inner surface of the central through hole is provided with multiple outlets. A depressurization channel (1) is disposed between the inlets and the outlets. The depressurization channel comprises dividing portions (101) and merging portions (102) that are connected in series and alternate. The dividing portion is used to change the direction of a liquid flow, while the merging portion is used to merge flows. Upon merging, the liquid flows collide with each other to generate a high turbulence, increasing friction between the flows as well as between the flows and a depressurization channel inner wall. Each time the flows merge, the flows collide with each other, canceling out a liquid impact force, thereby consuming flow energy and achieving depressurization.

Description

technical field [0001] The invention relates to the technical field of fluid control, in particular to an anti-cavitation pressure-reducing laminated valve cage. Background technique [0002] In the chemical production process, some valves are often used to control the flow and pressure of the medium. In some special working conditions, flashing and cavitation are easy to occur due to the large difference in the passing medium, which is easy to cause damage to the valve internals and ultimately affect the use of the product. Life, the existing product structure adopts labyrinth tortuous flow channel to step down the pressure step by step, and the laminations are connected by special welding methods. Different pressure differences require different labyrinth structures to meet the requirements of the site. The processing cost of the chip is high, the processing cycle is long, easy to block, unable to maintain and other problems ultimately affect the application of this type o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K47/02F16K47/08
CPCF16K47/02F16K47/08
Inventor 常占东赵文宝李虎生马秀萍周永兴贾华
Owner WUZHONG INSTR