CN202484403U

CN202484403U - Electric control pneumatic valve

Info

Publication number: CN202484403U
Application number: CN2011204829294U
Authority: CN
Inventors: 张承华
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-11-20
Filing date: 2011-11-20
Publication date: 2012-10-10
Anticipated expiration: 2021-11-20

Abstract

Provided is an electric control pneumatic valve operated through the combination of inside and outside forces, and the valve includes an upper cover, an air in-out mouth, a diaphragm upper-lower plate, a flat diaphragm or a bellows diaphragm, a connecting rod, a lower cover, a valve body, a valve plate, and a valve port; the opening, closing, adjusting and controlling of the valve can be controlled through a three-position three-way pneumatic solenoid valve or two two-position two-way solenoid valves and a contact compression gauge, or other similar electronic instruments, and the electric control pneumatic valve has the advantages of simple and reliable control and low cost.

Description

Electropneumatic valve

Technical field

The utility model relates to the electropneumatic valve that a kind of interior external force combines operation.

Technical background

Commercially available pneumatic valve is made up of actuator and valve two-part, couples together these two-part through an axle.The member of one stuffing box is arranged in its joint, tight axial compression, in order to avoid the valve inner fluid is excessive; Its shortcoming is: 1. since press the back resistance big, must increase driving force greatly to axle, 2. use a period of time after; Can reveal the valve inner fluid at the stuffing box place; Not only polluted environment, also wasted, the height of 3. controlling cost as raw-material fluid.

Summary of the invention

The purpose of the utility model is to develop the electropneumatic valve of the little no any leakage of a kind of driving force.

The characteristics of the utility model are with the cancellation of the stuffing box between actuator and the valve, and the two connects as a whole through flange, whole valve is divided into entrance cavity, outlet plenum and control chamber three parts, and the pressure in three chambeies is P respectively ₁, P ₂And P ₃Work as P ₃=P ₁The time because the diaphragm area between outlet plenum and control chamber is more than three times of valve port area at least, balance one times pressure after, also have the above pressure of twice to be pressed in valve plate on the valve port tightly; Work as P ₃=P ₂The time, P ₁Can valve plate be pushed into maximum valve position (standard-sized sheet) as boosting safety check; Work as P ₁＞P ₂＞P ₃The time, valve plate is in the middle valve position between the Push And Release, is in the regulation and control state.

A kind of electropneumatic valve is by loam cake, air inlet/outlet; The barrier film top board; Flat membrane, barrier film press table, connecting rod, lower cover, valve body with two semicircular projections; The valve plate, valve port and the 3-position-3-way air-operated solenoid valve that have the wing that leads constitute, and described lower cover and valve body are connected as a single entity through flange and resilient pad.

Described electropneumatic valve is that the solenoid valve of original 3-position-3-way solenoid valve by two 2/2-ways replaced.

Described electropneumatic valve also can have been set up spring and spring seat below the barrier film press table, described valve port and valve plate change valve port and lower valve port into, and spool changes taper upper valve core and taper lower valve core into.

Description of drawings

Fig. 1 is the flat membrane electropneumatic valve

Fig. 2 is a bellows barrier film electropneumatic valve

Fig. 3 is for having the electropneumatic valve of spring under the flat membrane

Specific embodiment:

Embodiment 1

As shown in Figure 1,1 is loam cake, and 2 is inlet, outlet, and 3 is the barrier film top board; 4 for having the flat membrane of two semicircular projections, and 5 is the barrier film press table, and 6 is connecting rod, and 7 is lower cover; 8 is valve body, and 9 is valve plate, and this valve plate is dull and stereotyped; The guiding wing is arranged below the plate, and 10 is valve port, and 18 is the 3-position-3-way air-operated solenoid valve.P ₁Be inlet pressure, P ₂Be outlet pressure, P ₃Be control chamber pressure.When the valve port basal area was S, then the barrier film basal area was at least more than the 3S.Selected bleed pressure is P ₃Must be equal to or greater than P ₁Three kinds of states are following:

1. when the 3-position-3-way air-operated solenoid valve is in source of the gas and control chamber and connects, or two 2/2-way solenoid valves that connect source of the gas are during with the control chamber connection, then P ₃=P ₁, so downward directed force F ₁=P ₃3S--P ₁S=P ₃3S--P ₃S=2P ₃S, direction down, kills sealing with valve port mutually.

2. when the 3-position-3-way air-operated solenoid valve is in control chamber and atmosphere and connects or open to atmosphere 2/2-way solenoid valve during with the atmosphere connection, P ₃=0 (emptying), the directed force F that makes progress ₂=P ₁S--P ₃3S=P ₁S--0=P ₁S, valve plate are pushed into valve plate the position of standard-sized sheet under the promotion that system's inner fluid makes progress.

3. when 3-position-3-way air-operated solenoid valve when switch is regulated P3 big or small repeatedly or repeatedly during two 2/2-way solenoid valves of switch, can make F ₁＞F ₃＞F ₂, at this moment, arbitrary valve position that valve plate mediates.

The solenoid valve of an aforesaid 3-position-3-way air-operated solenoid valve and two 2/2-ways can replace each other.

The difference of said valve of Fig. 1 and commercially available pneumatic valve has two: 1. saved spring and the spring seat under the film; 2. be connected as a single entity lower cover 7 and valve body 8, not only eliminated leaking outside, and reduced the driving force of valve.

Embodiment 2

As shown in Figure 2,1 is loam cake, and 2 is inlet, outlet, and 6 is connecting rod, and 7 is lower cover; 8 is valve body, and 9 is valve plate, and this valve plate is a sleeve type window formula valve plate, can accurately regulate and control the flow of fluid; Its stroke is greater than the stroke of flat valve plate, and 10 is valve port, and 11 is the bellows barrier film, and is flexible through bellows; Can significantly change the stroke of valve plate, 12 ripple periosteum top boards, 13 ripple periosteum press tables, 18 is the solenoid valve of 3-position-3-way air-operated solenoid valve or two 2/2-ways.The principle of the switch regulation and control of valve as shown in Figure 2 is identical with embodiment 1, and its advantage is: because this valve plate is a sleeve type window formula valve plate, so can accurately regulate and control the flow of fluid significantly.

Embodiment 3

As shown in Figure 3,14 is last valve port, and 15 is lower valve port, and 16 is the taper upper valve core, and 17 are the taper lower valve core, and 19 is the film lower spring, and 20 is spring seat, and other are with embodiment 1, owing to adopt bivalve mouth and double spool up and down, stress balance is regulated and control stable up and down.It and embodiment 1 and 2 differences are, when flat membrane 4 moves down throttle down, with spring 19 compressions; When part 18 was in the emptying position, the elastic force that mainly leans on spring 19 was with valve opening.

The utility model is compared with commercially available pneumatic valve, and the lower cover 7 of embodiment 1-3 has removed the stuffing box that compresses connecting rod elastic packing 6 with 8 of valve bodies for static seal is connected, so the power of switch valve is very little, and thoroughly eliminates the evaporating, emitting, dripping or leaking of liquid or gas of commercially available pneumatic valve.The fluid that the valve of the utility model is suitable for can be gas, liquid and slurry.Commercially available self force type control valve can't be used for slurry, because very little as the water conservancy diversion aperture of guide's control, very easy quilt blocks, and the present technique scheme has thoroughly been eliminated the easy stifled shortcoming that commercially available hydraulic control valve exists.

Embodiment 4

3-position-3-way air-operated solenoid valve 18 or two 2/2-way solenoid valves in embodiment 1,2 or 3 are connected with commercially available pressure gauge with electric contact, and with the given P3 of manometric pointer, other two electric contacts link to each other with the coil of control air inlet or emptying respectively; Behind the given P3, with regard to the given on off state or the valve position of this valve, as P3 during less than setting value; The coil of air inlet solenoid valve is connected; The conducting of air inlet position to control chamber, raises P3 pressure from the source of the gas air inlet; When P3 rises to given P3 when above, the coil contact breaks off, and coil has a power failure, and suction valve cuts out; As P3 during greater than setting value, the moving electromagnetic valve of dropping a hint is opened, and P3 is reduced; When P3 reduced to setting value, coil broke off, and was in the closed electromagnetic valve of emptying position; When P3 equals setting value, two coil nodes all be in not air inlet of off state also not emptying to keep P3 constant, valve position is constant.Every commercially available contact electrohydraulic pressure control table has only 50 yuan, can play the pressure control effect of pressure transmitter and controller, and cost have only its 1/20th.

Claims

1. an electropneumatic valve is by loam cake (1), air inlet/outlet (2); Barrier film top board (3); Flat membrane (4), barrier film press table (5), connecting rod (6), lower cover (7), valve body (8) with two semicircular projections; The valve plate (9), valve port (10) and the 3-position-3-way air-operated solenoid valve (16) that have the wing that leads constitute, and it is characterized in that described lower cover (7) and valve body (8) link into an integrated entity through flange and resilient pad.

2. electropneumatic valve as claimed in claim 1 is characterized in that described 3-position-3-way solenoid valve (16) is replaced by the solenoid valve of two 2/2-ways.

3. according to claim 1 or claim 2 electropneumatic valve, it is characterized in that having set up in the below of barrier film press table (5) spring (19) with spring seat (20), go up valve port (14) and lower valve port (15) and taper upper valve core (16) and taper lower valve core (17).