CN201706047U - Micro-operation valve - Google Patents

Abstract

The utility model relates to a valve, particularly to a micro-operation valve utilizing a micro actuating force and the enlarging action by virtue of the self pressure of a medium to realize big switching and regulating action of the valve. The micro-operation valve comprises an inflow chamber, a buffer chamber and an outflow chamber, wherein the buffer chamber is arranged between the inflow chamber and the outflow chamber, an inlet is formed on the inflow chamber, an outlet is formed on the outflow chamber, a valve core is used for separating the three chambers, a medium channel is arranged between the buffer chamber and the outflow chamber, and a control valve is arranged on the medium channel. The micro-operation valve has the advantages that the leakage flow from the gap of the valve core and the buffer chamber is permitted and utilized to control, and the membrane sealing is not required, thereby avoiding the equipment failure caused by the aging of the membrane; as the self pressure of the medium is utilized, the operation is labor-saving and energy-saving, the reliability is greatly improved, and the control valve and a big valve are closed. At the moment, no channel except for the big valve port can be used for leakage flow; furthermore, the greater the front-rear differential pressure of the valve becomes, the greater the turning-off force becomes, so that the possibility of internal leakage is little.

Description

Micro-operation type valve

Technical field

The present invention relates to a kind of valve, specifically, is that a kind of pressure of medium self that utilizes is used medium self pressure through amplification by small actuating force, realizes the switch that valve is big and regulates the micro-operation type valve that moves.

Background technique

Common valve is divided into forms such as manual, electronic, pneumatic in operating aspect.Its operation forces directly acts on spool, has following problem at present:

1, operating difficulties.No matter the valve of special big specification is electronic or manually, all have bite, resistance big, fit badly, open difficult problem.

2, leak outside seriously.Valve is through the use of certain hour, and the sealing of valve rod place the medium phenomenon that leaks outside occurs because of aging, wearing and tearing, the lax reason such as valve rod corrosion that reaches.

3, fit badly, interior leakage.All rely on external force owing to turn-off, and external force is often less than normal, thereby causes interior leakage.

4, operation and sealing mechanism are huge, have wasted a large amount of metallic material and manufacture cost.

Above problem, the situation that leaks outside in has particularly been wasted a large amount of energy, has a strong impact on environmental beauty, for a long time, is the thorny problems that most of industrial and mining enterprise constantly solve always.

Summary of the invention

The objective of the invention is to overcome above defective, a kind of medium self differential pressure switch valve of using is provided, thereby realize the micro-operation type valve of " little operation, big-movement ".

The structure of micro-operation type valve of the present invention is such: it comprises influent stream chamber, buffer cavity, goes out to flow the chamber, buffer cavity is arranged on the influent stream chamber and goes out to flow between the chamber, the influent stream chamber is provided with import, go out to flow the chamber outlet is set, by spool above-mentioned three chambers Jie is opened, buffer cavity and go out to flow medium channel is set between the chamber is provided with control valve on the medium channel.

Medium channel is set to be connected buffer cavity and goes out to flow PRESSURE PIPE between the chamber, and control valve is arranged on pilot

On.Medium channel also can be for being arranged on the through hole of spool central authorities, and control valve is arranged on the top of buffer cavity spool, and the diameter of axle of through hole and the joint end of control valve cooperate.

Spool with go out to flow the joint, chamber and be set to taper, the place, piston clearance of spool establishes tapering.

Medium channel is set to axially, and spool moves vertically.

The spool upper end is a piston, and the lower end is a sealing surface.Buffer cavity and go out to flow medium channel is set between the chamber is provided with control valve on the medium channel.If medium channel is set to be connected buffer cavity and goes out to flow PRESSURE PIPE between the chamber, then control valve is arranged on the PRESSURE PIPE.If medium channel is the through hole that is arranged on spool central authorities, then control valve is arranged on the top of buffer cavity spool, and the diameter of axle of through hole and the joint end of control valve cooperate.If make valve have the well-tuned characteristic, can spool with go out to flow the junction, chamber and be set to taper, the place, piston clearance of spool establishes the tapering or the spool of other shape lines.Spool also can be set to axial motion, makes valve become axial flow (or claiming tubular) valve.

The technological merit of micro-operation type valve is:

1, allows and utilize the gap leakage current of spool and buffer cavity to control, need not adopt diaphragm seal, avoided the aging equipment failure that brings of film.

2, use the pressure of medium self, rapid operation is energy-conservation, and reliability greatly increases.

3, control valve is closed, and big valve cuts out.The front and back of no any passage leakage current except that big valve valve port, and valve at this moment pressure reduction is big more, and closing force is big more, leaks in being difficult for.

4, big valve does not have valve rod, and little control valve did not have leakage problem originally, does not leak outside so have.

5, cancel big valve operating gear, saved metallic material, reduce production costs.

6, as required, two kinds of structures of optional one and split.

This control principle can be used for the fluid-flow control apparatus on other equipment, for example: the adjusting of steam turbine admission, various sparger working medium flows etc.

Description of drawings

Fig. 1 is the structural representation of embodiments of the invention 1;

Fig. 2 is the structural representation of embodiments of the invention 2;

Fig. 3 is the structural representation of embodiments of the invention 3;

Fig. 4 is the structural representation of embodiments of the invention 4;

Fig. 5 is the structural representation of embodiments of the invention 5;

Fig. 6 is the structural representation of embodiments of the invention 6.

Embodiment

Embodiment 1:

As shown in Figure 1, it comprises micro-operation type valve of the present invention influent stream chamber 9, buffer cavity 3, goes out to flow chamber 7, and buffer cavity 3 is arranged on influent stream chamber 9 and goes out to flow between the chamber 7, by spool 2 above-mentioned three chambers is situated between and opens.Buffer cavity 3 and go out to flow between the chamber 7 medium channel is set is provided with control valve 4 on the medium channel.Medium channel is set to be connected buffer cavity 3 and goes out to flow PRESSURE PIPE 5 between the chamber 7, and control valve 4 is arranged on the PRESSURE PIPE 5.

Working principle: medium enters influent stream chamber 9 from import 1, when control valve 4 is closed, because there is the gap in spool 2 with valve cover chamber, makes pressure balance between influent stream chamber 9 and the buffer cavity 3.Under the effect of import 1 and outlet 6 pressure reduction and spool 2 gravity, spool 2 moves downward, and closes big valve.When control valve 4 was opened, the medium in the buffer cavity 3 flowed to going out to flow chamber 7 through PRESSURE PIPE 5, and the reduction of buffer cavity 3 pressure also approaches out the pressure in stream chamber 7.Because the area of spool 2 upper piston greater than the area at bottom valve port place, is upwards pressed at the condition lower valve core 2 that pressure reduction is identical, causes big valve open.As seen, control valve is opened, and big valve is then opened; Otherwise control valve closes, and big valve then closes.Promptly realized what is called: " little operation, big-movement ".If operating valve is a safety valve, so whole little behaviour's valve should be a big safety valve.

Another function of this valve is that the position of operating valve can be arranged arbitrarily, can be implemented in the big valve of operation outside the certain distance.For example: big valve environment of living in abominable (high temperature, poisonous etc.) can be installed on little valve the position of safe ready operation.

Embodiment 2:

On embodiment 1 basis, improved, promptly be provided with through hole 10 at the center of spool 2, medium channel is arranged on the through hole 10 of spool 2 central authorities, and control valve 4 is arranged on the top of buffer cavity 3 spools 2, makes the valve core chamber formation valve seal relation of spool 2 with the big valve of control valve 4.

According to above-mentioned principle, when control valve 4 unlatchings, big opening of valves; Control valve 4 is closed, and big valve cuts out.Improved benefit like this is: big or small valve integratedization, simplify the structure and installation workload, but that shortcoming is the stroke of operating valve is the same with big valve, and if when operating valve adopts electronic or steam-operating, require slightly higher to the stroke of final controlling element.

Embodiment 3:

Present embodiment will change the flow process of traditional stop valve, and the structure of the medium vertical current being crossed valve port changes the axial flow mistake into.

Medium enters influent stream chamber 9 from import 1, when control valve 4 is closed, and the description of reference implementation case 1, influent stream chamber 9, pressure balance between the buffer cavity 3, big valve cuts out; When control valve 4 was opened, the pressure of buffer cavity 3 was near the pressure that goes out to flow chamber 7, and under the effect of influent stream chamber 9,3 pressure reduction of buffer cavity, spool 2 is moved to the left opens big valve.This valve can be called: the axial flow behaviour's valve that declines.The advantage of this valve is: 1, the more traditional stop valve smoothness of media flow, thereby flow resistance is little, and energy-saving significance is arranged; 2, external form is simple and direct attractive in appearance, is convenient to install.

Embodiment 4:

Present embodiment is established tapering at the place, piston clearance of spool 2, when piston moves, the area in gap changes, thereby the realization negative feedback that is: when the increase of control valve 4 apertures, is moved the gap and is also become big on the spool 2, pressure reduction between influent stream chamber 9 and the buffer cavity 3 is reduced, move on restriction spool 2 is undue, vice versa, thereby reach the one-to-one relationship of operation aperture and spool 2 positions.

Spool 2 can be sphere, taper or labyrinth shape with the sealing surface form of valve body 8.

For the little behaviour's valve of adjustable type, its control valve not only can be manually as requested, also can be electronic and pneumatic control.

Embodiment 5:

Present embodiment is to establish tapering at place, the piston clearance of spool on embodiment 2 basis, and the lower end of spool 2 is set to taper or other shape lines, and purpose is to be designed to modulating valve.

Embodiment 6:

Present embodiment is to establish tapering at place, the piston clearance of spool on embodiment 3 basis, and the lower end of spool is set to taper or other shape lines, and purpose is to be designed to modulating valve.

Claims (5)

1. micro-operation type valve, it comprises influent stream chamber, buffer cavity, goes out to flow the chamber, buffer cavity is arranged on the influent stream chamber and goes out to flow between the chamber, the influent stream chamber is provided with import, go out to flow the chamber outlet is set, it is characterized in that: by spool above-mentioned three chambers are situated between and open, buffer cavity and go out to flow medium channel is set between the chamber is provided with control valve on the medium channel.

2. micro-operation type valve according to claim 1 is characterized in that: medium channel is set to be connected buffer cavity and goes out to flow PRESSURE PIPE between the chamber, and control valve is arranged on the PRESSURE PIPE.

3. micro-operation type valve according to claim 1 is characterized in that: medium channel is the through hole that is arranged on spool central authorities, and control valve is arranged on the top of buffer cavity spool, and the diameter of axle of through hole and the joint end of control valve cooperate.

4. micro-operation type valve according to claim 1 is characterized in that: spool with go out to flow the joint, chamber and be set to taper, the place, piston clearance of spool establishes tapering.

5. micro-operation type valve according to claim 1 is characterized in that: medium channel is set to axially, and spool moves vertically.

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