CN209054150U - A kind of switch valve - Google Patents

Abstract

The utility model embodiment discloses a kind of switch valve, including valve shell, and spool and spring, effect and the air inlet conical surface seal of the valve shell of the effect end of the spool by the spring are equipped in the valve shell；In this way, when in use, pass through the effect of the spring, so that the spool stress is squeezed at the air inlet of the valve shell, and since the effect end of the spool and the air inlet of the valve shell use conical surface seal, and then overcome the unbalanced problem of aerodynamic force caused by the sealing of traditional approach lower peripheral surface and end face seal.

Description

A kind of switch valve

Technical field

The utility model relates to a kind of switching device more particularly to a kind of switch valves.

Background technique

Currently, since the working media of switch valve (especially high-pressure pneumatic high-speed switch valve) when in use is with certain The pressure-air of pressure, therefore there is certain requirement to the leakproofness of switch valve, and in the prior art, the spool of switch valve Sealing means between the air inlet of valve shell generally use ball face sealing or end face seal, but using ball face sealing or When person's end face seal, since sealing effect is bad, usually there is the unbalanced phenomenon of aerodynamic force in switch valve, and then leads to switch valve Solenoid valve when in use due to air pressure effect and leading to the problem of can not open.

Utility model content

In order to solve the above technical problems, the utility model embodiment provides a kind of switch valve, can by improve spool with Valve shell air inlet leakproofness, come the unbalanced problem of aerodynamic force for avoiding switch valve from occurring in use, Jin Erti The using effect of high switch valve.

In order to achieve the above object, the technical solution of the utility model embodiment is achieved in that

The utility model embodiment provides a kind of switch valve, including valve shell, be equipped in the valve shell spool and The connecting pin of spring, the spool is connect by the spring with the valve shell, and the effect end of the spool passes through described The effect of spring and the air inlet conical surface seal of the valve shell.

In the utility model embodiment, high pressure gas from the connecting pin of the spool to the effect end of the spool that opened up from Hole, wherein the high pressure stomata is connected to the air inlet of the valve shell.

In the utility model embodiment, the high pressure pore openings bore on spool effect end is greater than institute State the high pressure pore openings bore on spool connecting pin.

In the utility model embodiment, the groove for gas storage is opened up on the connecting pin end face of the spool.

In the utility model embodiment, sealing lubrication pad is set, and the spool passes through on the outer surface of the spool The sealing lubrication pad is slidably connected with the valve shell.

In the utility model embodiment, grading ring slot, the sealing lubrication are circumferentially opened up along the outer surface of the spool Pad is arranged in the grading ring slot.

In the utility model embodiment, the sealing lubrication pad is soft graphite ring.

The utility model embodiment provides a kind of switch valve, which includes valve shell, in the valve shell Equipped with spool and spring, the connecting pin of the spool is connect by the spring with the valve shell, the effect of the spool Effect and the air inlet conical surface seal of the valve shell of the end by the spring；In this way, when in use, passing through the spring Effect so that the spool stress is squeezed at the air inlet of the valve shell, and due to the effect end of the spool with The air inlet of the valve shell uses conical surface seal, and then overcomes produced by the sealing of traditional approach lower peripheral surface and end face seal The unbalanced problem of aerodynamic force.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of switch valve provided by the embodiment of the utility model；

Fig. 2 is a kind of structural schematic diagram of spool provided by the embodiment of the utility model.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe.

The utility model embodiment provides a kind of switch valve, as illustrated in fig. 1 and 2, including valve shell 1, outside the valve body Spool 2 and spring 3 are equipped in shell 1, the connecting pin of the spool 2 is connect by the spring 3 with the valve shell 1, described Effect and the air inlet conical surface seal of the valve shell 1 of the effect end of spool 2 by the spring 3.

Here, as shown in Figure 1, the switch valve generally comprises sealing ring 9, valve shell 1, spool 2, coil 7, coil bone Frame 71, end cap 22, conducting wire 8, spring 3, air inlet and air outlet are arranged on the valve shell 1, and the spool 2 is arranged described In valve shell 1, and the right-hand end of the spool 2, that is, spool 2 connecting pin is located at the entrance of the valve shell 1, The end cap 22, left side section and the valve of the end cap 22 is arranged in the left-hand end of the spool 2, that is, spool 2 effect end Body case 1 is threadedly coupled, and the right-hand end of the valve shell 1 is arranged in the valve shell 1, and the right side of the end cap 22 End connects the spool 2 by the spring 3, on 22 ontology of end cap in the valve shell 1 also successively described in socket Coil rack 71 and the coil 7, the coil rack 71 contact portion with the end cap 22 and the valve shell 1 respectively Equipped with sealing ring 9, for preventing the leakage of high pressure gas.

Specifically, the switch valve in the utility model embodiment when in use, by the effect of the spring 3, so that institute 2 stress of spool is stated to extruding at the air inlet of the valve shell 1, and outside the effect end due to the spool 2 and the valve body The air inlet of shell 1 use conical surface seal, then further increase sealing effect, so overcome traditional approach lower peripheral surface sealing and The unbalanced problem of aerodynamic force caused by end face seal.

Further, as illustrated in fig. 1 and 2, in the utility model embodiment, from the connecting pin of the spool 2 to described The high pressure stomata 21 that the effect end of spool 2 opens up, wherein the high pressure stomata 21 is connected to the air inlet of the valve shell 1.

21 aperture bore of the high pressure stomata on the spool 2 effect end is greater than on 2 connecting pin of spool The 21 aperture bore of high pressure stomata.

The groove 4 for gas storage is opened up on the connecting pin end face of the spool 2.

Here, as shown in Figure 1, side opens up the high pressure stomata 21 to the left by the right-hand end of the spool 2, work as institute in this way State valve shell 1 air inlet be passed through high pressure gas after, the high pressure gas can be acted on described by the high pressure stomata 21 The left and right sides of spool 2, balances 2 stress of spool (almost), and such electromagnetic force only needs to overcome 3 power of spring of the spring 3 Effect the switch valve can just opened, and then improve the using effect of the switch valve.

More preferably, the high pressure stomata 21 is opened up along the central axes of the spool 2, is located at the spool 2 and is acted on end, that is, Fig. 1 Described in spool 2 left end on 21 aperture bore of the high pressure stomata slightly larger than valve described in described 2 connecting pins of spool, that is, Fig. 1 21 aperture bore of the high pressure stomata on the right end of core 2, improves the using effect of the switch valve in this way.

Specifically, the groove 4 for gas storage is opened up on the connecting pin end face of the spool 2, is closed in this way in the switch valve Also it will receive Aerodynamic force action when closing, reduce the effect of 3 power of spring, improve the shut-in time of the switch valve.

Further, as illustrated in fig. 1 and 2, in the utility model embodiment, it is arranged on the outer surface of the spool 2 close Lubricating pad 5 is sealed, and the spool 2 is slidably connected by the sealing lubrication pad 5 and the valve shell 1.

Grading ring slot 6 is circumferentially opened up along the outer surface of the spool 2, the sealing lubrication pad 5 is arranged in the grading ring In slot 6.

The sealing lubrication pad 5 is soft graphite ring.

Here, as shown in Figure 1, four grading ring slots 6 are circumferentially opened up along the outer surface of the spool 2, it is described close Envelope lubricating pad 5 is separately positioned in the grading ring slot 6, wherein the effect that the sealing lubrication pad 5 not only needs to seal, together When should also have good lubricant effect, to reduce the frictional force of the spool 2 during exercise, improve the response speed of solenoid valve Degree, therefore when specifically used, due to the density very little of flexible graphite material, there are special gas phases in flexible graphite material Structure, this special solid-gas phase structure causes flexible graphite material to have good compressibility and resilience, on the other hand soft Property graphite there is good lubricant effect, can reduce the frictional force of spool 2 during the motion, therefore select by soft graphite The manufactured soft graphite ring is as the sealing lubrication pad 5.

Specifically, in the utility model embodiment switch valve shown in figure 1 use principle are as follows: at the beginning of the switch valve Beginning state is in off state, when the air inlet of the valve shell 1 is passed through high pressure gas, due in the spool 2 along central axis Equipped with the high pressure stomata 21, such high pressure gas can be full of 2 left and right sides of spool, and at this moment, 2 stress of spool is flat Weighing apparatus.When the solenoid valve is energized, coil 7 can generate an electromagnetic force, and originally electromagnetic force is less than 3 pretightning force of spring, solenoid valve It is in close state, as electromagnetic force constantly increases, when electromagnetic force is greater than 3 pretightning force of spring, solenoid valve is opened, high pressure Gas flows out from the venthole of the valve shell 1；When solenoid valve powers off, electromagnetic force will not reduce immediately, at this time 3 power of spring Less than electromagnetic force, solenoid valve is still in opening state, with the reduction of electromagnetic force, the solenoid valve when 3 power of spring is greater than electromagnetic force It closes, since there is the groove 4 in 2 left end of spool, in this way when solenoid valve is closed, it is only necessary to which the power of very little can make electromagnetism Valve is closed.

The beneficial effect of switch valve shown in figure 1 includes: in the utility model embodiment

1, it is designed by the structure to the spool 2, solenoid valve is made to can be realized fast opening and closing, improve the response speed of valve Degree；

2, the filling flexible graphite in the grading ring slot 6 of the spool 2, on the one hand can play the role of sealing, On the other hand, it since soft graphite has lubricating action, can reduce the frictional force in 2 motion process of spool, improve electricity The response speed of magnet valve.

Above are merely preferred embodiments of the utility model, it is noted that above-mentioned preferred embodiment should not regard For limitations of the present invention, the protection scope of the utility model should be defined by the scope defined by the claims..For For those skilled in the art, without departing from the spirit and scope of the utility model, it can also make several Improvements and modifications, these improvements and modifications also should be regarded as the protection scope of the utility model.

Claims (7)

1. a kind of switch valve, including valve shell (1), the valve shell (1) is interior to be equipped with spool (2) and spring (3), the valve The connecting pin of core (2) is connect by the spring (3) with the valve shell (1), which is characterized in that the work of the spool (2) Pass through the effect of the spring (3) and the air inlet conical surface seal of the valve shell (1) with end.

2. a kind of switch valve according to claim 1, which is characterized in that from the connecting pin of the spool (2) to the valve The high pressure stomata (21) that the effect end of core (2) opens up, wherein the air inlet of the high pressure stomata (21) and the valve shell (1) Mouth connection.

3. a kind of switch valve according to claim 2, which is characterized in that be located at described on the spool (2) effect end High pressure stomata (21) aperture bore is greater than high pressure stomata (21) aperture bore on the spool (2) connecting pin.

4. a kind of switch valve according to claim 2, which is characterized in that opened up on the connecting pin end face of the spool (2) Groove (4) for gas storage.

5. a kind of switch valve according to claim 1, which is characterized in that sealing is arranged on the outer surface of the spool (2) Lubricating pad (5), and the spool (2) is slidably connected by the sealing lubrication pad (5) with the valve shell (1).

6. a kind of switch valve according to claim 5, which is characterized in that the outer surface along the spool (2) circumferentially opens up Grading ring slot (6), sealing lubrication pad (5) setting is in the grading ring slot (6).

7. a kind of switch valve according to claim 5, which is characterized in that the sealing lubrication pad (5) is soft graphite ring.