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A low-noise control valve with pre-start structure

A low-noise, regulating valve technology, applied in the field of regulating valves, can solve problems such as large noise, achieve the effects of reducing fluid noise, improving flow capacity, and reducing initial lifting force

Active Publication Date: 2018-08-17
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the pre-opening valve is in the working condition of small opening and high pressure ratio at this time, there will be a lot of noise during the opening process, so it is imperative to design a pre-opening structure with a throttling function.

Method used

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  • A low-noise control valve with pre-start structure
  • A low-noise control valve with pre-start structure
  • A low-noise control valve with pre-start structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: Combining Figure 1 to Figure 5 , the present invention includes a three-way valve body 33, a valve stem 22, a pre-opening plunger 21, a large flow throttling element 11, a baffle plate 12, a valve head 13, a pre-opening valve seat 14, a sealing spring ring 15, a compression spring 23, Pressing member 31, upper cover plate 32, etc., the lower end of the three-way valve body is provided with an outflow channel, and both sides are symmetrically provided with inflow channels, that is, the valve body 33 of the present invention has inflow channels 331, 332 and outflow channels 333 , the middle of the valve body is provided with a valve chamber in a three-way shape, two inflow passages are symmetrically arranged on the left and right sides, and an outflow passage is arranged at the lower end. The inflow passage and the outflow passage pass through the valve chamber. and the pre-opening structure are coaxially fitted and form a sealing fit with the opening end of t...

Embodiment 2

[0029] Embodiment 2: Based on the above-mentioned embodiment, the present invention can also be: the center position of the bottom of the pre-opening plunger is provided with a curved rotary body that slows down the vortex collision downstream of the pre-opening valve seat, forming a vortex separation structure, and the lower end is connected to the pre-opening valve seat. The opening of the valve outflow channel is in the same horizontal plane, such as figure 2 shown. After the fluid flows through the pre-opening labyrinth throttling channel, the curved guide structure at the center of the pre-opening plunger can realize the rectification effect on the post-opening valve, avoiding the turbulent hedging of the fluid behind the valve. After the fluid flows out of the pre-opening valve seat, due to the existence of the curved body C at the center of the pre-opening plunger, it can play a group role in slowing down the eddy current collision downstream of the pre-opening valve s...

Embodiment 3

[0030] Embodiment 3: Based on the above embodiment, the present invention can also be: the middle and upper part of the large-flow throttling element is provided with an annular groove, and the annular groove is provided with a plurality of openings to realize penetration. The large-flow throttling element is arranged outside the valve head, and a number of through open flow areas are opened on the large-flow throttling element, and the valve head can slide axially on the inner surface of the large-flow throttling element. The shape, size and quantity of the runners can be calculated and determined according to the actual working conditions. The fluid passes through the large flow throttling element and the through slit on the valve head to realize the communication between the external valve cavity and the pre-opening valve cavity.

[0031] The working process of the present invention is: when the valve is opened, the pre-opening plunger 21 is first lifted, and the fluid pass...

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Abstract

The invention provides a low-noise adjusting valve with a pre-starting structure. The low-noise adjusting valve with the pre-starting structure comprises a three-way valve body, an upper cover plate, a valve rod, a pre-starting plunger, a pre-starting valve seat, a valve head and a large-flow throttling element, wherein a pressing piece is mounted in the center of the upper cover plate; an end of the valve rod is fixedly connected with the upper end of the pre-starting plunger; the lower end of the valve head is clamped at the bottom of the three-way valve body; the middle of the valve head is fixedly connected with a baffle; the pre-starting valve seat is fixedly mounted at the bottom end of the valve head; the baffle and the pre-starting valve seat are positioned in the valve head; a narrow slit flow channel is further formed in the valve head; a pressure spring sleeves the valve rod; one end of the pressure spring is fixedly connected with the pressing piece while the other end of the pressure spring is fixedly connected with the baffle; at least one annular groove is formed in the lower end of the pre-starting plunger; at least one annular projection is arranged at the upper end of the pre-starting valve seat; and after each annular groove is matched with the corresponding annular projection, a labyrinth type pre-starting structure is formed. The initial lifting force of the valve can be reduced effectively, fluid noises under the condition of small opening are reduced, turbulent flow collision is relieved, and flow capacity under the condition of large opening is improved.

Description

technical field [0001] The invention relates to a regulating valve, in particular to a low-noise regulating valve with a pre-opening structure, which is suitable for reducing flow loss and fluid noise under multi-pressure ratio working conditions. Background technique [0002] In nuclear power generation, large-scale chemical production equipment and other industrial fields, control valves are widely used in process control systems to adjust process parameters such as medium flow and pressure in industrial automation processes. According to the control signal in the automation system, the opening of the valve is automatically adjusted, so as to realize the flow of working fluid between the inlet and outlet of the valve. In order to meet the specific fluid flow characteristics required by various working conditions, the existing low-noise valves often use a multi-stage throttling cage in the flow channel between the valve outlet and the inlet. The multi-stage throttling can n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K1/00F16K47/08
CPCF16K1/00F16K47/08
Inventor 刘崇唐东伟曲东越
Owner HARBIN ENG UNIV
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