CN222185276U - A pilot-operated gas-controlled valve - Google Patents

Abstract

The utility model relates to a pilot-operated pneumatic control valve which comprises a valve body, wherein a top spring, a piston rod, an upper sealing slide seat, a lower sealing slide seat and an auxiliary spring are sequentially arranged in the valve body from top to bottom, the upper end and the lower end of the piston rod are connected with the piston and the upper sealing slide seat, the upper sealing slide seat is connected with the lower sealing slide seat through a reversing guide post, the upper sealing slide seat slides in an upper sealing slide seat cavity, the lower sealing slide seat slides in a lower sealing slide seat cavity, a pilot hole, an air inlet hole, an air exhaust hole and a working hole are arranged in the valve body, the inner port of the pilot hole faces the bottom of the piston, the inner port of the air inlet hole is positioned below the upper sealing slide seat, the inner port of the air exhaust hole is positioned above the lower sealing slide seat, and the inner port of the working hole is communicated with the upper sealing slide seat cavity and the lower sealing slide seat cavity. The utility model solves the problem that the valve core has a direct-acting structure with an external pilot, the sealing form of the valve core is changed, and the direct-acting sealing valve structure is adopted to realize the control of various media of the two-position three-way normally-closed valve, and has excellent sealing performance and long service life.

Description

Pilot-operated pneumatic control valve

Technical Field

The utility model belongs to the technical field of valves, and relates to a pilot-operated type pneumatic control valve.

Background

In pneumatic systems, valves are a relatively widely used component in pneumatic circuits, with the most common applications being three-position five-way solenoid valves, two-position five-way solenoid valves, and the like. The prior art mainly realizes the replacement of the valve body and the valve core position of the electromagnetic valve by alternately electrifying coils at two ends of the electromagnetic valve to switch the valve core position, so that the problem of complex control structure exists.

Disclosure of Invention

The utility model aims to provide a pilot type pneumatic control valve which can solve the problems and has excellent sealing performance and long service life.

According to the technical scheme, the pilot operated valve comprises a valve body, wherein a top spring, a piston rod, an upper sealing slide seat, a lower sealing slide seat and an auxiliary spring are sequentially arranged in the valve body from top to bottom, the upper end and the lower end of the piston rod are connected with the piston and the upper sealing slide seat, the upper sealing slide seat is connected with the lower sealing slide seat through a reversing guide post, the upper sealing slide seat slides in an upper sealing slide seat cavity, the lower sealing slide seat slides in a lower sealing slide seat cavity, a pilot hole, an air inlet hole, an air exhaust hole and a working hole are arranged in the valve body, an inner port of the pilot hole faces the bottom of the piston, an inner port of the air inlet hole is positioned below the upper sealing slide seat, an inner port of the air exhaust hole is positioned above the lower sealing slide seat, and the inner port of the working hole is communicated with the upper sealing slide seat cavity and the lower sealing slide seat cavity.

As a further improvement of the utility model, the upper valve body, the intermediate body, the lower valve body and the lower valve cover form a valve body.

As a further improvement of the utility model, the pilot hole is arranged in the intermediate body, and the air inlet hole, the air outlet hole and the working hole are arranged in the intermediate body.

As a further improvement of the utility model, the top spring abuts the valve body and the piston top.

As a further improvement of the utility model, the auxiliary spring butts against the valve body and the bottom of the lower sealing slide seat.

As a further improvement of the utility model, an upper sealing gasket is arranged at the bottom of the upper sealing slide seat.

As a further improvement of the utility model, a lower gasket is mounted on top of the lower sealing slide.

As a further improvement of the utility model, a first sealing ring is sleeved on the periphery of the piston, a second sealing ring is arranged between the piston and the piston rod, and a third sealing ring is sleeved on the periphery of the piston rod.

As a further improvement of the utility model, a fourth sealing ring is arranged between the upper valve body and the intermediate body, a fifth sealing ring is arranged between the intermediate body and the lower valve body, and a sixth sealing ring is arranged between the lower valve body and the lower valve cover.

The application has the positive progress effects that:

the utility model has the advantages of rapid and stable working state switching, excellent sealing performance and long service life.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

FIG. 2 is a schematic view of the lower valve body of the present utility model.

In fig. 1-2, the valve comprises an upper valve body 1, a top spring 2, a nut 3, a piston 4, a second sealing ring 6, a third sealing ring 7, a piston rod 8, a fourth sealing ring 9, an intermediate body 10, a fifth sealing ring 11, an upper sealing sliding seat 12, a lower valve body 13, a reversing guide column 14, a sixth sealing ring 15, a lower sealing plug 16, a lower sealing sliding seat 17, an auxiliary spring 18, a lower valve cover 19, a pilot hole 20, an air inlet hole 21, an air outlet hole 22, a working hole 23 and the like.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the utility model herein. Furthermore, the terms "comprise" and "have," and the like, mean that other elements not already listed can be "comprised" and "have" in addition to those already listed in "comprising" and "having," e.g., a process, method, system, article, or apparatus that can comprise a series of steps or elements is not necessarily limited to those steps or elements already listed, but can include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Due to the drawing angle problem, some parts may not be drawn, but the positions and connection relations of the parts may be understood according to the text expression part.

As shown in fig. 1-2, the pilot-operated air control valve comprises a valve body, wherein a top spring 2, a piston 4, a piston rod 8, an upper sealing slide seat 12, a lower sealing slide seat 17 and an auxiliary spring 18 are sequentially arranged in the valve body from top to bottom, the upper end and the lower end of the piston rod 8 are connected with the piston 4 and the upper sealing slide seat 12, the upper sealing slide seat 12 is connected with the lower sealing slide seat 17 through a reversing guide pillar 14, the upper sealing slide seat 12 slides in an upper sealing slide seat cavity, the lower sealing slide seat 17 slides in a lower sealing slide seat cavity, a pilot hole 20, an air inlet 21, an air outlet 22 and a working hole 23 are arranged in the valve body, the inner end of the pilot hole 20 faces the bottom of the piston 4, the inner end of the air inlet 21 is positioned below the upper sealing slide seat 12, the inner end of the air outlet 22 is positioned above the lower sealing slide seat 17, and the inner end of the working hole 23 is communicated with the upper sealing slide seat cavity and the lower sealing slide seat cavity.

The upper valve body 1, the intermediate body 10, the lower valve body 13 and the lower valve cover 19 form a valve body.

Pilot hole 20 is formed in intermediate 10. The air inlet 21, the air outlet 22 and the working hole 23 are arranged in the intermediate body 10.

The top spring 2 abuts against the top of the valve body and piston 4 and the auxiliary spring 18 abuts against the bottom of the valve body and lower seal slide 17.

To enhance the sealing performance, an upper gasket 16-1 is installed at the bottom of the upper sealing slide 12, and a lower gasket 16-2 is installed at the top of the lower sealing slide 17.

The first sealing ring 5 is sleeved on the periphery of the piston 4, the second sealing ring 6 is arranged between the piston 4 and the piston rod 8, the third sealing ring 7 is sleeved on the periphery of the piston rod 8, the fourth sealing ring 9 is arranged between the upper valve body 1 and the intermediate body 10, the fifth sealing ring 11 is arranged between the intermediate body 10 and the lower valve body 13, and the sixth sealing ring 15 is arranged between the lower valve body 13 and the lower valve cover 19.

The working process of the utility model is as follows:

as shown in fig. 1, the upper valve body 1 has an exhaust port at the top, when the pilot hole 20 is not pressurized, the inner port of the air inlet 21 is compressed by the upper gasket 16-1 under the action of the top spring 2, the working hole 23 cannot be connected, and the working hole 23 is communicated with the exhaust hole 22, so as to realize the exhaust function.

When the pilot hole 20 has air pressure, the inner end of the pilot hole 20 blows to the piston 4, the piston 4 overcomes the pressure of the top spring 2 and drives the upper sealing slide seat 12 to move upwards through the piston rod 8, so that the air inlet 21 is communicated with the working hole 23, and meanwhile, the lower sealing gasket 16-2 at the top of the lower sealing slide seat 17 blocks the inner port of the air outlet 22, so that the function of the two-position three-way air control valve is realized.

It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present utility model, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the utility model, and are also considered to be within the scope of the utility model.

Claims (9)

1. The utility model provides a guide formula pneumatic control valve, which comprises a valve body, and is characterized in that, be equipped with top spring (2) from top to bottom in the valve body in proper order, piston (4), piston rod (8), go up sealed slide (12), lower sealed slide (17), piston (4) and last sealed slide (12) are connected to piston rod (8) upper and lower extreme, go up sealed slide (12) and be connected with sealed slide (17) down through switching-over guide pillar (14), it slides in last sealed slide chamber to go up sealed slide (12), sealed slide (17) down are equipped with pilot hole (20) in the valve body, inlet port (21), exhaust hole (22), working hole (23), pilot hole (20) inner port is towards piston (4) bottom, inlet port (21) inner port is located sealed slide (12) below down, exhaust hole (22) inner port is located sealed slide (17) top down, working hole (23) inner port intercommunication is sealed slide chamber down.

2. Pilot operated valve according to claim 1, characterised in that the upper valve body (1), the intermediate body (10), the lower valve body (13) and the lower valve cover (19) constitute a valve body.

3. Pilot operated valve according to claim 2, characterized in that the pilot hole (20) is provided in the intermediate body (10), and the inlet hole (21), the exhaust hole (22) and the working hole (23) are provided in the intermediate body (10).

4. Pilot operated valve according to claim 1, characterised in that the top spring (2) is against the top of the valve body and the piston (4).

5. Pilot operated valve according to claim 1, characterised in that the auxiliary spring (18) is against the valve body and the bottom of the lower sealing slide (17).

6. Pilot operated valve according to claim 1, wherein the bottom of the upper sealing slide (12) is provided with an upper sealing gasket (16-1).

7. Pilot operated valve according to claim 1, characterised in that a lower gasket (16-2) is mounted on top of the lower sealing slide (17).

8. The pilot operated valve according to claim 1, wherein a first sealing ring (5) is sleeved on the outer periphery of the piston (4), a second sealing ring (6) is arranged between the piston (4) and the piston rod (8), and a third sealing ring (7) is sleeved on the outer periphery of the piston rod (8).

9. Pilot operated valve according to claim 2, characterized in that a fourth sealing ring (9) is arranged between the upper valve body (1) and the intermediate body (10), a fifth sealing ring (11) is arranged between the intermediate body (10) and the lower valve body (13), and a sixth sealing ring (15) is arranged between the lower valve body (13) and the lower valve cover (19).