CN201897002U

CN201897002U - Regulating valve

Info

Publication number: CN201897002U
Application number: CN 201020611677
Authority: CN
Inventors: 仇始建; 徐海洋
Original assignee: SUZHOU DELAN ENERGY TECHNOLOGY Co Ltd
Current assignee: SUZHOU DELAN ENERGY SCIENCE & TECHNOLOGY CORP., LTD.
Priority date: 2010-11-16
Filing date: 2010-11-16
Publication date: 2011-07-13
Anticipated expiration: 2020-11-16

Abstract

The utility model relates to the field of fluid control, particularly discloses a regulating valve, which comprises a spool, a disc component and a plurality of annular bosses. The disc component disposed outside the spool includes a plurality of discs stacked together, each disc includes an annular bottom plate, the annular bosses are radially disposed on the upper surface and the lower surface of each bottom plate, each annular boss is composed of a plurality of spaced annular boss units, and the annular boss units on the upper surface of one bottom plate and the annular boss units on the lower surface of the same bottom plate are staggered. The disc component is disposed outside the spool, so that high-pressure fluid entering from outside of the disc component is slowed down by means of multi-stage decompression, pressure and speed are controlled to be above a cavitation point, the sealing face is prevented from being flushed by high-speed fluid and damaged by cavitation, and sealing performance of the valve is improved while service life thereof is prolonged.

Description

A kind of modulating valve

Technical field

The utility model relates to fluid control field, particularly relates to a kind of modulating valve.

Background technique

Existing fluid pressure slowing-down structure has:

U.S. Copes-Vulcan company adopts multistage tube-in-tube structure.Under big pressure reduction condition, fluid is flowed through and is carried out multi-step pressure reduction again after the valve seat, purpose be allow fluid before the speedup that do not expand as yet just earlier by valve seat, this moment, flow velocity was lower, to the minimum of washing away of sealing surface, thereby was used for guaranteeing working life of valve.The shortcoming of this structure is: the first, owing to be to punch on sleeve, work efficiency is not high.The second, the wall thickness of each sleeve needs certain thickness to increase the intensity of sleeve after punching, if pressure reduction is very big, when needing the step-down of more multistage number, valve cavity can be very big, also increased the profile of valve simultaneously, makes valve too heavy.

U.S. CCI company adopts the stacked structure of DRAG recycle valve labyrinth disc sheet.This valve is the stacked structure of labyrinth disc sheet, has disc special, labyrinth.It utilizes the multistage 90 degree runners that turn round on a plurality of discs, has improved the resistance coefficient of throttling element, has increased the degree of amplitude modulation of resistance coefficient, has reduced flow velocity, plays antiscour, anti-cavitation and reduction function of noise.Its shortcoming is: turn round because runner is 90 degree, blocked up by dirty card easily, influence the negotiability of valve; Complicated runner has also brought very big difficulty to processing, can't use traditional machined into, can only use electrical spark or Cutter Body Processing with Machining Center, and work efficiency is low, the cost height.

Domestic manufacturer is designed to a plurality of strangling heads on spool, make the inlet high pressure carry out multistage step-down by the throttling spool head, and velocity of medium is slowed down, to prevent cavitation and to wash away.Commonly used have three grades and a level Four.Shortcoming: step-down progression is few, can only be suitable for the occasion than small pressure difference; After strangling head is too much the valve height is increased, the cost height, profile is inharmonious, processing difficulties.

The model utility content

(1) technical problem that will solve

How effectively the technical problems to be solved in the utility model is the convection cell deceleration of reducing pressure.

(2) technological scheme

For solving the problems of the technologies described above, a kind of modulating valve is provided, comprise spool, be outside equipped with disc devices at described spool, described disc devices comprises some discs stacked together, each described disc comprises the ring-type chassis, the upper and lower surface on described chassis has some circle annular boss of radially arranging respectively, the described annular boss of every circle has spaced-apart ring-shaped boss unit by plurality of sections and forms the annular boss unit interlaced arrangement of the annular boss unit of described chassis upper surface and described chassis lower surface.

Preferably, the described annular boss of every circle comprises four sections, six sections or eight sections annular boss unit.

Preferably, between the described annular boss of every circle apart from value 1.5mm, 2mm, 2.5mm or 3mm.

Preferably, width value 1.5mm, 2mm, 2.5mm or the 3mm of described boss.

(3) beneficial effect

By disc devices is set outside spool, after the feasible high-pressure liquid that enters from the disc devices outside passes through the multi-step pressure reduction reduction of speed, pressure and speed controlling have prevented that sealing surface is subjected to the destruction of washing away of high-velocity fluid and cavitation more than cavitation point, improved the sealability and the working life of valve.

Description of drawings

Fig. 1 is the structural representation according to the disc devices of modulating valve of the present utility model;

Fig. 2 is the structure worm's eye view according to the disc of modulating valve of the present utility model;

Fig. 3 is the plan view of Fig. 2;

Fig. 4 is the sectional view of Fig. 2.

Wherein, 1: spool; 2: disc devices; 3: boss.

Embodiment

Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples are used to illustrate the utility model, but are not used for limiting scope of the present utility model.

As shown in Figure 1, the utility model provides a kind of modulating valve, comprises spool 1, is outside equipped with disc devices 2 at spool 1, and disc devices 2 comprises some discs stacked together.Shown in Fig. 2-4, each disc comprises the ring-type chassis, the upper and lower surface on chassis has some circle annular boss 3 of radially arranging respectively, every circle annular boss 3 has spaced-apart ring-shaped boss unit by plurality of sections and forms the annular boss unit interlaced arrangement of the annular boss unit of chassis upper surface and chassis lower surface.Preferably, between every circle annular boss 3 apart from value 1.5mm, 2mm, 2.5mm or 3mm.Boss 3 is along width value 1.5mm, 2mm, 2.5mm or the 3mm of disc radial.

By calculating the negotiability of valve, determine circulation area and valve stroke in the disc; Determine the step-down progression of disc according to inlet outlet pressure differential; From above calculating, determine the size of single disc.

When high-pressure liquid enters the inboard outside disc, first restriction convection cell carries out throttling, fluid by primary throttling after, can directly clash into the step on another disc of disc devices, the energy of consumption fluid also underspeeds, then because the obstruction on weir, make fluid change flow direction, enter second restriction, successively behind the multi-step pressure reduction reduction of speed, make the pressure of fluid and speed controlling more than cavitation point, prevented that sealing surface is subjected to the destruction of washing away of high-velocity fluid and cavitation, improve the sealability and the working life of valve.Because the runner in the middle of each disc is annular, is beneficial to the discharge of foul, it is stifled to make valve be difficult for card, thereby reaches the stable performance of valve.Loop configuration is easy to realize on lathe, has improved manufacturing efficiency, reduces cost.The circulation area of disc can be made amendment under the situation that does not change stroke, to guarantee the negotiability of different parameters, has improved the commutativity between the different size valve, makes product up-gradation more flexible.

The above only is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvement and modification, these improve and modification also should be considered as protection domain of the present utility model.

Claims

1. modulating valve, comprise spool, it is characterized in that, be outside equipped with disc devices at described spool, described disc devices comprises some discs stacked together, and each described disc comprises the ring-type chassis, and the upper and lower surface on described chassis has some circle annular boss of radially arranging respectively, the described annular boss of every circle has spaced-apart ring-shaped boss unit by plurality of sections and forms the annular boss unit interlaced arrangement of the annular boss unit of described chassis upper surface and described chassis lower surface.

2. modulating valve as claimed in claim 1 is characterized in that, the described annular boss of every circle comprises four sections, six sections or eight sections annular boss unit.

3. modulating valve as claimed in claim 1 or 2 is characterized in that, between the described annular boss of every circle apart from value 1.5mm, 2mm, 2.5mm or 3mm.

4. modulating valve as claimed in claim 1 or 2 is characterized in that, width value 1.5mm, 2mm, 2.5mm or the 3mm of described boss.