CN208578975U - A kind of pneumatic stopping valve - Google Patents

Abstract

The purpose of the utility model is to provide a kind of pneumatic stopping valve, the pneumatic stopping valve includes: valve means and cylinder driver, wherein the cylinder driver includes upper chamber of air cylinder, lower chamber of air cylinder, upper piston and lower piston；The valve means include valve body, valve head, spool and sealing surface of seat；It is equipped with upper piston in the upper chamber of air cylinder, lower piston is equipped in the lower chamber of air cylinder, by the synthesis power of the upper piston and lower piston to drive the valve means to enter the corresponding operating mode of valve；Vertical spool is equipped in the inner cavity of the valve body, the upper end of the spool is connected with the cylinder driver, the lower end of the spool is connected with the valve head, by the cylinder driver to the driving effect of the valve means, the operating mode of the valve head and sealing surface of seat formation valve.It is designed using split type valve head, so that the maintenance replacement of valve head position is simple, use, the maintenance cost of valve is greatly lowered.

Description

A kind of pneumatic stopping valve

Technical field

The utility model relates to valve technology field more particularly to a kind of pneumatic stopping valves.

Background technique

In air-leakage test test or fluid control, if the control of high pressure gas is directly manually controlled with valve etc., The disadvantages of will appear control not in time, controlling imprecision, can not achieve long-range control.If gas stop valve low-pressure gas control High-pressure fluid processed, it can be achieved that long-range control, control in time etc., and the main conventional func of existing gas stop valve be " open, Close " two states.User determines the valve products for selecting dimension according to the range of flow of required control medium, conventional Pneumatic stopping valve mostly use uniline stroke cylinder to connect with spool, and the structure of spool and valve head whole design, at valve It is to seal when closed state, between valve head and valve seat firmly, sealing surface generates impression to cause valve after being repeatedly pressurized for a long time Interior leakage, and replace core assembly when need completely to decompose valve driving machine structure, valve body, spool in the case of carry out, after decomposition its Its sealing element also fails and replaces therewith, and mounting technology difficulty is also bigger.Therefore, valve leaks in use appearance, User can only make whole valve and scrap.

Utility model content

The purpose of the utility model is to provide a kind of pneumatic stopping valves, to solve the one-stroke gas of Conventional pneumatic shut-off valve Cylinder, spool and valve body are integral structure, replace and repair difficult problem after the crushing of valve head part.

In order to solve the above technical problems, one side according to the present utility model, provides a kind of pneumatic stopping valve, the gas Dynamic shut-off valve includes:

Valve means and cylinder driver, wherein the cylinder driver include upper chamber of air cylinder, lower chamber of air cylinder, on Piston and lower piston；The valve means include valve body, valve head, spool and sealing surface of seat；It is equipped in the upper chamber of air cylinder upper Piston, the lower chamber of air cylinder is interior to be equipped with lower piston, by the synthesis power of the upper piston and lower piston to drive the valve Body device enters the corresponding operating mode of valve；In the inner cavity of the valve body be equipped with vertical spool, the upper end of the spool with The cylinder driver is connected, and the lower end of the spool is connected with the valve head, by the cylinder driver to described The driving effect of valve means, the valve head and the sealing surface of seat form the operating mode of valve.

Further, the diameter of the upper chamber of air cylinder is greater than the diameter of the lower chamber of air cylinder, and the upper chamber of air cylinder and institute Stating lower chamber of air cylinder is reducing chamber.

Further, the cylinder driver includes cylinder end piece, and the cylinder end piece is located at the upper chamber of air cylinder Top and the side of the cylinder end piece be equipped with first interface, the first interface be used for the upper chamber of air cylinder ventilate.

Further, the cylinder driver includes second interface and third interface, and the second interface is located at described Between upper chamber of air cylinder and the lower chamber of air cylinder, the third interface is located at the lower section of the lower chamber of air cylinder.

Further, the cylinder driver includes position-limiting unit, and the position-limiting unit is set to the upper chamber of air cylinder Inside, and it is located at the lower section of the upper piston.

Further, the spool includes bellows spool.

Further, the valve means include: valve deck and elastic device,

Wherein, the valve deck is located at the top of the valve body, and the intermediate through-hole that is equipped with is to be passed through the spool；

One end of the elastic device is connected with the lower end of the spool, and the other end is connected with the valve deck.

Further, the valve head includes: taper tup.

Further, the valve head includes: torque pin hole.

Compared with prior art, the utility model provides a kind of pneumatic stopping valve, and the pneumatic stopping valve includes: valve body Device and cylinder driver, wherein the cylinder driver includes upper chamber of air cylinder, lower chamber of air cylinder, upper piston and lower piston； The valve means include valve body, valve head, spool and sealing surface of seat；Upper piston, the cylinder are equipped in the upper chamber of air cylinder Under it is intracavitary be equipped with lower piston, by the synthesis power of the upper piston and lower piston to drive the valve means to enter valve Corresponding operating mode；Vertical spool is equipped in the inner cavity of the valve body, the upper end of the spool and cylinder driving fill Set connected, the lower end of the spool is connected with the valve head, the driving by the cylinder driver to the valve means Effect, the valve head and the sealing surface of seat form the operating mode of valve.To generate different role power by double-piston Synthesis, linkage driving spool, form axial multi-section stroke displacement, realize the different flowing control function of valve, can be effective Rate-of flow is adjusted, the practical value of valve is substantially improved；It is designed using split type valve head, it can be achieved that after the crushing of valve head part Use, the maintenance cost of valve is greatly lowered in simple replacement and reparation, and different flows can be selected according to valve head taper, Expand the use scope of valve.

Detailed description of the invention

By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the utility model Other features, objects and advantages will become more apparent upon:

Fig. 1 shows the structural schematic diagram of pneumatic stopping valve in an embodiment of the present invention；

Fig. 2 shows taper valve head open state schematic diagrams different in an embodiment of the present invention；

Fig. 3 shows the structural schematic diagram of valve head in pneumatic stopping valve.

The same or similar appended drawing reference represents the same or similar component in attached drawing.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawing.

Fig. 1 shows the structural schematic diagram of pneumatic stopping valve in an embodiment of the present invention, and the pneumatic stopping valve includes: Valve means 1 and cylinder driver 2, wherein the cylinder driver 2 includes upper chamber of air cylinder 20, lower chamber of air cylinder 21, upper work Plug 201 and lower piston 211；The valve means 1 include valve body 11, valve head 12, spool 13 and sealing surface of seat 14；The cylinder It is equipped with upper piston 201 in epicoele 20, is equipped with lower piston 211 in the lower chamber of air cylinder 21, passes through the upper piston 201 and lower piston 211 synthesis power is to drive the valve means 1 to enter the corresponding operating mode of valve；It is set in the inner cavity of the valve body 11 There is vertical spool 13, the upper end of the spool 13 is connected with the cylinder driver 2, the lower end of the spool 13 and institute Valve head 12 is stated to be connected, by the cylinder driver 2 to the driving effect of the valve means 1, the valve head 12 with it is described The operating mode of the formation valve of sealing surface of seat 14.Here, the A interface of body portion is medium inlet, B is media outlet.It adopts With aerodynamics combinatorial principle, simple cleverly structure is carried out to the pneumatic operated valve of linear reciprocating mechanism and is designed, gas is realized Dynamic shut-off valve new breakthrough in terms of flow control.Specifically, synthesis, the linkage driving of different role power are generated by double-piston Spool 13 forms axial multi-section stroke displacement, realizes the different flowing control function of valve, can effectively adjust rate-of flow, The practical value of valve is substantially improved；By the spool structure seperated with valve head, it can be achieved that after the crushing of valve head part it is simple more It changes and repairs.

In an embodiment of the utility model, the diameter of the upper chamber of air cylinder 20 is greater than the diameter of the lower chamber of air cylinder 21, And the upper chamber of air cylinder 20 and the lower chamber of air cylinder 21 are reducing chamber.Here, the upper piston 201 in upper chamber of air cylinder 20 is big living It fills in, the lower piston 211 in lower chamber of air cylinder 21 is small piston, and cylinder is changed to double cylinders by single cylinder by twin-stage reducing chamber, is made Twin-stage proportioning cylinder is obtained under the driving gas effect of uniform pressure, double-piston generates the synthesis of different role power, linkage driving Spool 13 forms axial multi-section stroke displacement, realizes the different flowing control function of valve.

Further, the valve means 1 include: valve deck 15 and elastic device 16, wherein the valve deck 15 is located at described The top of valve body 11, and the intermediate through-hole that is equipped with is to be passed through the spool 13；One end of the elastic device 16 and the spool 13 Lower end be connected, the other end is connected with the valve deck 15.Here, elastic device 16 can be spring, spool 13 is driven by cylinder It is connected by spring with 15 elasticity of valve deck when the driving of dynamic device 12 moves up and down in the through-hole of valve deck 15.

Further, the cylinder driver 2 includes cylinder end piece 22, and the cylinder end piece is located at the upper chamber of air cylinder 20 top and it is equipped with first interface C in the side of the cylinder end piece 22, the first interface C is used for the upper chamber of air cylinder 20 ventilations.Further, the cylinder driver 2 includes second interface D and third interface E, and described second interface D Between the upper chamber of air cylinder 20 and the lower chamber of air cylinder 21, the third interface E is located at the lower section of the lower chamber of air cylinder 21.It is logical The gas that the first interface C, second interface D and third interface E are passed through is crossed, the upper piston 201 and lower piston 211 are formed Synthesis power.In an embodiment of the utility model: E interface plenum, the lower end of lower piston 211 in lower chamber of air cylinder 21 Face generates upward active force, and D, C interface lead in the case of atmospheric pressure, and the upper surface of upper and lower two pistons is without active force, double-piston Synthesize upward active force, spool 13, which shifts up, opens valve (valve head 12 and sealing surface of seat 14 are kept completely separate)；C, E interface It is pressurized simultaneously, D interface leads to atmosphere, and the driving gas for acting on upper piston in upper chamber of air cylinder 20 (big piston) 201 upper surfaces generates Down force F1, and it is greater than the directed force F 2 that lower piston (small piston) 211 is upward in lower chamber of air cylinder 21, so as to overcome valve The directed force F 3 of the factors such as the force of sliding friction of the generations such as piston ring, valve stem packing and fluid resistance, forms and closes in the movement of core 13 Power Δ F driving spool 13 moves down.As shown in Figure 1, the cylinder driver 2 includes position-limiting unit 23, the limit is single Member 23 is set to the inside of the upper chamber of air cylinder 20, and is located at the lower section of the upper piston 201.Here, position-limiting unit 23 can be with For limit film, upper piston 201 is acted in downward displacement process by limit film 23, between formation valve head 12 and valve seat 14 centainly Distance, valve are in throttle；D interface plenum, E interface lead to atmosphere, and lower piston 211 is by upper end in lower chamber of air cylinder 21 Driving atmospheric pressure effect in face moves down, and valve head 12 and sealing surface of seat 14 are closed, and closes valve.It is prominent by twin-stage proportioning cylinder Intrinsic " open, close " the two kinds of operating modes of Conventional pneumatic shut-off valve have been broken, have realized " open, is half-open, closing " three kinds of states Operating mode, to improve the flowing control function of pneumatic stopping valve.

Further, the spool 13 includes bellows spool, and pneumatic stopping valve described in Fig. 1 can be applied to bellows valve Core, bellows spool and bellows are using argon gas protection weldering connection, it is of course possible to understanding, pneumatic stopping valve described in Fig. 1 It can be applicable to packing sealing pneumatic stopping valve, operating pressure highest can be promoted to 10MPa or more.

In an embodiment of the utility model, the valve head 12 includes: taper tup.Here, integral type valve core is improved For valve head and the split type threaded connection of spool.The sealing cone of valve head 12 can be processed according to different angle, can be formed different Restriction effect.Such as different taper valve head open state schematic diagrams shown in Fig. 2,30 ° and 60 ° of cone-shaped valve heads, in axial phase In the case of displacement X, gap X1, the X2 formed between valve base sealing surface is different, thus causes different through-flow sections Face.So as to realize various control flow in a certain range by the valve head to same replacing valve difference taper Selection.The structural schematic diagram of valve head 12 as shown in Figure 3, the valve head 12 includes: torque pin hole 121.Here, working as valve Repeatedly work causes under 12 local compression damaged condition of valve head door, only need to open valve deck 15, by the assembly and disassembly of torque pin hole 121, more Valve head 12 is changed, realizes the reparation to valve.

Pneumatic stopping valve described in the utility model is designed using split type valve head, so that the maintenance replacement letter of valve head position It is single, use, the maintenance cost of valve is greatly lowered, and different flows can be selected according to valve head taper, expands valve Use scope.To have very good popularization and application foreground in fields such as fluid controls.

It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in All changes in justice and range are included in the utility model.It should not treat any reference in the claims as limiting Related claim.Furthermore, it is to be understood that one word of " comprising " does not exclude other units or steps, odd number is not excluded for plural number.Device The multiple units or device stated in claim can also be implemented through software or hardware by a unit or device.The One, the second equal words are used to indicate names, and are not indicated any particular order.

Claims (9)

1. a kind of pneumatic stopping valve, which is characterized in that the pneumatic stopping valve includes: valve means and cylinder driver, In, the cylinder driver includes upper chamber of air cylinder, lower chamber of air cylinder, upper piston and lower piston；The valve means include valve body, Valve head, spool and sealing surface of seat；

It is equipped with upper piston in the upper chamber of air cylinder, is equipped with lower piston in the lower chamber of air cylinder, passes through the upper piston and lower piston Synthesis power to drive the valve means to enter the corresponding operating mode of valve；

Vertical spool is equipped in the inner cavity of the valve body, the upper end of the spool is connected with the cylinder driver, described The lower end of spool is connected with the valve head, by the cylinder driver to the driving effect of the valve means, the valve Head forms the operating mode of valve with the sealing surface of seat.

2. pneumatic stopping valve according to claim 1, which is characterized in that the diameter of the upper chamber of air cylinder is greater than the cylinder The diameter of cavity of resorption, and the upper chamber of air cylinder and the lower chamber of air cylinder are reducing chamber.

3. pneumatic stopping valve according to claim 1, which is characterized in that the cylinder driver includes cylinder end piece, The cylinder end piece be located at the top of the upper chamber of air cylinder and the side of the cylinder end piece be equipped with first interface, described first Interface is used to ventilate to the upper chamber of air cylinder.

4. pneumatic stopping valve according to claim 1, which is characterized in that the cylinder driver include second interface with Third interface, between the upper chamber of air cylinder and the lower chamber of air cylinder, the third interface is located at described the second interface The lower section of lower chamber of air cylinder.

5. pneumatic stopping valve according to claim 1, which is characterized in that the cylinder driver includes position-limiting unit, The position-limiting unit is set to inside the upper chamber of air cylinder, and is located at the lower section of the upper piston.

6. pneumatic stopping valve according to claim 1, which is characterized in that the spool includes bellows spool.

7. pneumatic stopping valve according to claim 1, which is characterized in that the valve means include: valve deck and elasticity dress It sets,

Wherein, the valve deck is located at the top of the valve body, and the intermediate through-hole that is equipped with is to be passed through the spool；

One end of the elastic device is connected with the lower end of the spool, and the other end is connected with the valve deck.

8. pneumatic stopping valve according to claim 1, which is characterized in that the valve head includes: taper tup.

9. pneumatic stopping valve according to claim 1, which is characterized in that the valve head includes: torque pin hole.