CN214699322U

CN214699322U - Novel pneumatic three-way valve

Info

Publication number: CN214699322U
Application number: CN202120996519.5U
Authority: CN
Inventors: 向宇芬
Original assignee: Wenzhou Yuanda Valve Co ltd
Current assignee: Wenzhou Yuanda Valve Co ltd
Priority date: 2021-05-11
Filing date: 2021-05-11
Publication date: 2021-11-12
Anticipated expiration: 2031-05-11

Abstract

The utility model discloses a novel pneumatic three-way valve, including valve body and pneumatic means, the valve body upper end is equipped with the valve gap, sets up the valve rod in the valve body, is equipped with valve pocket and lower valve pocket in the valve body, and the valve rod lower extreme is equipped with the case, and both ends all are equipped with seal gasket about the case, and threaded connection has the cylinder head under the pneumatic means, still be equipped with the cylinder head gland on the cylinder head, the cylinder head cover is established and is passed through threaded connection with the valve gap after the valve cap is gone up fixedly. The utility model discloses in, be equipped with the filler between valve gap and the valve rod, still be equipped with disc spring between the filler, valve pocket up end and takeover upper end all are equipped with sealed bulge loop down, be equipped with on the seal gasket with the corresponding seal groove of sealed bulge loop, pretightning force between disc spring and the cylinder head gland can prevent effectively that the cylinder head is not hard up and cause disappointing, sealed bulge loop cooperatees with the seal groove, can greatly increase the sealing performance between it, can also play certain positioning action simultaneously, prevent that the case from taking place the displacement because seal gasket is wearing and tearing.

Description

Novel pneumatic three-way valve

Technical Field

The utility model relates to the technical field of valves, especially, relate to a novel pneumatic three-way valve.

Background

The existing three-way valve comprises a three-way ball valve, a three-way plug valve and the like. The three-way valve can be divided into a right-angle valve and a T-shaped valve according to different channel shapes. The traditional three-way right-angle ball valve can realize the communication or the closing of the left inlet and the right inlet with the middle through by rotating the ball body by 90 degrees through rotating the handle, thereby achieving the purpose of distributing fluid. After the valve is used for a period of time, the pretightening force between the valve body and the filler can be reduced or even disappear due to abrasion, deformation and other reasons, the structure is easy to abrade, the sealing effect is poor after long-term use, liquid leakage is easy to cause, finally, the metering is enabled to generate deviation, and the sealing performance between the valve body and the valve core is reduced due to abrasion of the sealing ring of the valve core, so that the user experience is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: in order to solve the problems, a novel pneumatic three-way valve is provided.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a novel pneumatic three-way valve, includes valve body and pneumatic means, the valve body lower extreme is equipped with the takeover with valve body threaded connection, the valve body upper end is equipped with the valve gap with valve body threaded connection, it is provided with the valve rod to slide in the valve body, be equipped with valve pocket and lower valve pocket in the valve body, it passes through the interface channel intercommunication with lower valve pocket to go up the valve pocket, the valve rod lower extreme is equipped with the case, both ends all are equipped with seal gasket about the case, threaded connection has the cylinder head under the pneumatic means, still be equipped with the cylinder head gland on the cylinder head, the cylinder head cover is established and is fixed through threaded connection with the valve gap after on the valve head, be equipped with the piston in the pneumatic means, the valve rod upper end runs through the valve gap and is connected with the piston, last air inlet port and the lower inlet port of being equipped with of pneumatic means.

As a further description of the above technical solution:

and a packing is arranged at the contact position of the upper end of the valve cover and the valve rod, and a belleville spring is further arranged between the packings.

As a further description of the above technical solution:

a belleville spring is arranged between the cylinder cover and the cylinder cover gland, and an elastic gasket and a sealing ring are further arranged at the contact position of the cylinder cover and the pneumatic device.

As a further description of the above technical solution:

the upper end face of the lower valve cavity is connected with the channel, the upper end of the connecting pipe is provided with a sealing convex ring, and a sealing gasket of the valve core is provided with a sealing groove corresponding to the sealing convex ring.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the utility model discloses an add on the cylinder head and establish the cylinder head gland to still add between the two and established disc spring, add on the cylinder head and establish elastic washer and sealing ring, the effectual gas tightness of having ensured pneumatic means, but owing to be through threaded connection, cause the screw thread to become flexible after long-time the use easily, reduce its gas tightness, so can effectively prevent through the pretightning force between disc spring and the cylinder head gland that the cylinder head is not hard up and cause disappointing.

2. The utility model discloses valve pocket up end connection channel position and takeover upper end all are equipped with sealed bulge loop under, be equipped with on the seal gasket of case with the corresponding seal groove of sealed bulge loop, when the last inlet port is ventilated, case can the downstream under atmospheric pressure's effect, the sealed bulge loop of takeover upper end this moment just in time is located the seal groove, when the inlet port was ventilated down in the same reason, case upward movement, the sealed bulge loop of valve pocket up end was located the seal groove under the messenger, can greatly increase the sealing performance between it, can also play certain positioning action simultaneously, prevent that the case from taking place the displacement.

Drawings

Fig. 1 shows a schematic front sectional structure diagram provided by an embodiment of the present invention.

Illustration of the drawings:

1. a valve body; 2. a pneumatic device; 3. taking over a pipe; 4. a valve cover; 5. a valve stem; 6. an upper valve cavity; 7. a lower valve cavity; 8. a connecting channel; 9. a valve core; 10. sealing gaskets; 11. a cylinder head; 12. a cylinder head gland; 13. a piston; 14. an upper air inlet hole; 15. a lower air inlet hole; 16. a filler; 17. a belleville spring; 18. an elastic washer; 19. a seal ring; 20. a sealing convex ring; 21. sealing the groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: a novel pneumatic three-way valve comprises a valve body 1 and a pneumatic device 2, wherein the lower end of the valve body 1 is provided with a connecting pipe 3 in threaded connection with the valve body 1, the upper end of the valve body 1 is provided with a valve cover 4 in threaded connection with the valve body 1, a valve rod 5 is arranged in the valve body 1 in a sliding way, an upper valve cavity 6 and a lower valve cavity 7 are arranged in the valve body 1, the upper valve cavity 6 and the lower valve cavity 7 are communicated through a connecting passage 8, a valve core 9 is arranged at the lower end of the valve rod 5, sealing gaskets 10 are respectively arranged at the upper end and the lower end of the valve core 9, the lower end of the pneumatic device 2 is connected with a cylinder cover 11 through screw threads, a cylinder cover gland 12 is also arranged on the cylinder cover 11, the cylinder cover 11 is sleeved on the valve cover 4 and then fixedly connected with the valve cover 4 through threads, a piston 13 is arranged in the pneumatic device 2, the upper end of the valve rod 5 penetrates through the valve cover 4 to be connected with the piston 13, and the pneumatic device 2 is provided with an upper air inlet 14 and a lower air inlet 15.

Specifically, as shown in fig. 1, a packing 16 is disposed at a position where the upper end of the valve cap 4 contacts the valve rod 5, a belleville spring 17 is further disposed between the packing 16, the packing 16 can increase the sealing performance between the valve rod 5 and the valve cap 4, and meanwhile, the packing 16 can be in a compressed state for a long time due to the self-tightening force of the belleville spring 17, so that the sealing performance between the valve rod 5 and the valve cap 4 is effectively ensured.

Specifically, as shown in fig. 1, a belleville spring 17 is arranged between the cylinder head 11 and the cylinder head cover 12, and an elastic gasket 18 and a sealing ring 19 are further arranged at a contact position between the cylinder head 11 and the pneumatic device 2, so that the cylinder head 11 and the cylinder head cover 12 are in threaded connection, threads are easy to loosen after long-term use, and the air tightness of the cylinder head is reduced, so that air leakage caused by loosening of the cylinder head 11 can be effectively prevented through the pre-tightening force between the belleville spring 17 and the cylinder head cover 12.

Specifically, as shown in fig. 1, the upper end surface of the lower valve cavity 7 is connected to the channel 8 and the upper end of the connecting pipe 3 is provided with a sealing convex ring 20, a sealing groove 21 corresponding to the sealing convex ring 20 is arranged on the sealing gasket 10 of the valve core 9, when the valve rod 5 receives air pressure to move up and down, the sealing convex ring 20 is matched with the sealing groove 21, so that the sealing performance between the sealing convex ring and the sealing groove can be greatly improved, meanwhile, a certain positioning effect can be achieved, and the valve core 9 is prevented from being displaced due to abrasion of the sealing gasket 10.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A novel pneumatic three-way valve comprises a valve body (1) and a pneumatic device (2) and is characterized in that a connecting pipe (3) in threaded connection with the valve body (1) is arranged at the lower end of the valve body (1), a valve cover (4) in threaded connection with the valve body (1) is arranged at the upper end of the valve body (1), a valve rod (5) is arranged in the valve body (1) in a sliding mode, an upper valve cavity (6) and a lower valve cavity (7) are arranged in the valve body (1), the upper valve cavity (6) is communicated with the lower valve cavity (7) through a connecting channel (8), a valve core (9) is arranged at the lower end of the valve rod (5), sealing gaskets (10) are arranged at the upper end and the lower end of the valve core (9), a cylinder cover (11) is connected with the lower end of the pneumatic device (2) through threads, a cylinder cover gland (12) is further arranged on the cylinder cover (11), the cylinder cover (11) is sleeved on the valve cover (4) and then is fixedly connected with the valve cover (4) through threads, the pneumatic device is characterized in that a piston (13) is arranged in the pneumatic device (2), the upper end of the valve rod (5) penetrates through the valve cover (4) to be connected with the piston (13), an upper air inlet hole (14) and a lower air inlet hole (15) are formed in the pneumatic device (2), and the piston (13) is located between the upper air inlet hole (14) and the lower air inlet hole (15).

2. A novel pneumatic three-way valve according to claim 1, characterized in that the upper end of the valve cover (4) is provided with a packing (16) at the position where the valve rod (5) contacts, and a belleville spring (17) is further arranged between the packing (16).

3. A new pneumatic three-way valve according to claim 1, characterized in that a belleville spring (17) is provided between the cylinder head (11) and the cylinder head gland (12), and an elastic washer (18) and a sealing ring (19) are provided at the contact position of the cylinder head (11) and the pneumatic device (2).

4. The novel pneumatic three-way valve according to claim 1, wherein sealing convex rings (20) are arranged at the position of the connecting passage (8) at the upper end surface of the lower valve cavity (7) and at the upper end of the connecting pipe (3), and a sealing groove (21) corresponding to the sealing convex ring (20) is arranged on a sealing gasket (10) of the valve core (9).