CN213929640U

CN213929640U - Piston type reciprocating pneumatic valve

Info

Publication number: CN213929640U
Application number: CN202023023696.XU
Authority: CN
Inventors: 贺佳; 孟宁宁
Original assignee: Weihai Zhongsu New Material Technology Co ltd
Current assignee: Weihai Zhongsu New Material Technology Co ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-08-10
Anticipated expiration: 2030-12-15

Abstract

The utility model relates to a piston type reciprocating pneumatic valve, which solves the technical problems that the prior valve is easy to damage due to contacting with corrosive liquid, the valve seat is provided with a valve seat and a valve core, a step cavity for installing the valve core and a liquid circulation through hole are arranged in the valve seat, two air passages for communicating the step cavity with the outside of the valve seat are arranged on the side wall of the valve seat, the valve core is provided with two air cavities, the air cavities are respectively communicated with the two air passages through uniformly distributed holes, a valve core sealing cover is arranged at the part, extending out of the valve seat, of the valve core, the valve core sealing cover is connected with the valve core through threads, a sealing end cover is arranged on the other side face, corresponding to the valve core sealing cover, of the valve seat, an output flange plate and an input flange plate are further arranged on two sides of the valve seat respectively, the output flange. The utility model discloses can extensively be in the pneumatic control who has corrosive liquids.

Description

Piston type reciprocating pneumatic valve

Technical Field

The utility model relates to the field of machine-building, especially, relate to a piston pneumatic valve that reciprocates.

Background

Pneumatic valves are valves which are actuated by means of compressed air. The valve core does piston type reciprocating motion through the input and the discharge of compressed air, the circulation and the blocking of the fluid are controlled, and the pneumatic valve can be used for controlling the flow of various types of fluid such as air, water, steam, mud, oil products, liquid metal, radioactive media and the like. As used in the liquid crystal semiconductor industry, the type of fluid that the valve controls is a corrosive liquid, often resulting in damage to the valve.

Disclosure of Invention

The utility model discloses a solve current valve contact corrosive liquids, the technical problem of easily damaging provides a longe-lived, corrosion-resistant piston pneumatic valve that reciprocates.

The utility model provides a piston pneumatic valve that reciprocates, it is equipped with disk seat and case, disk seat inside is equipped with ladder cavity and the liquid circulation through-hole of installing the case, the disk seat lateral wall is equipped with two air flues of intercommunication ladder cavity and disk seat outside, the case is equipped with two air cavitys, the air cavity communicates with two air flues respectively through the equipartition hole, the case stretches out the disk seat position and has installed the sealed lid of case, the sealed lid of case passes through the screw thread and is connected with the case, the disk seat corresponds the sealed another side of case and is equipped with end cover, the disk seat both sides still are equipped with output ring flange and input ring flange respectively, output ring flange and input ring flange pass through threaded connection spare and connect and compress tightly end cover and disk seat, the input ring flange communicates with output ring flange through entering disk seat liquid circulation through-hole, the case slides control input ring flange in the disk seat and communicates and turn-off with output ring flange.

Preferably, the mutual contact parts of the output flange, the sealing end cover, the valve seat, the valve core and the input flange are all provided with sealing rings.

Preferably, the extending part of the valve core is also provided with a valve core fixing end cover, the valve core fixing end cover compresses the valve core sealing cover, and the valve core fixing end cover is firmly connected with the valve core through a fastening screw.

Preferably, the valve seat, the output flange plate, the input flange plate, the sealing end cover and the valve core fixing end cover are made of polyvinyl chloride, the valve core is made of polyethylene, and the valve core sealing cover is made of polytetrafluoroethylene.

The utility model discloses beneficial effect:

the utility model discloses in the channel region of case, the phi 1 through-hole that 4 circumference equidistance of design distribute can satisfy the requirement that increases the atmosphere pressure, and the leakproofness of equipment can be further increased to quantity, minimum aperture design simultaneously, and precision and operation stability are controlled to improve equipment. The valve core is controlled to work under an oil-free working condition through gas, pollution is avoided, the valve core is made of the ultra-high molecular polyethylene material with wear resistance, and the service life of the valve core is prolonged.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of the exploded structure of the present invention;

FIG. 3 is a schematic view of the valve seat structure of the present invention;

FIG. 4 is a schematic view of the sectional structure A-A of the valve seat of the present invention;

fig. 5 is a schematic view of the sectional structure of the valve core of the present invention.

Description of the symbols of the drawings:

1. an output flange seal ring; 2. an output flange plate; 3. sealing the end cap; 4. an end cap seal ring; 5. a valve seat output side sealing ring; 6. a valve seat; 7. a tracheal tube interface; 8. a valve seat input side sealing ring; 9. a valve core output side sealing ring; 10. a valve core; 11. a valve core input side sealing ring; 12. a valve core sealing cover; 13. a valve core fixing end cover; 14. tightening the screw; 15. inputting a flange plate; 16. and inputting a flange sealing ring.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples, so that those skilled in the art can easily implement the present invention.

As shown in fig. 1-5, the utility model discloses be equipped with

disk seat

6, 6 inside echelonment cavitys that are used for installing case 10 that are equipped with along the axis of disk seat, the cavity link up disk seat 6, be equipped with the air flue of 2 vertical axis on the cavity, put through outside air supply, 2 air flues pass through the screw thread and connect in a trachea interface 7 respectively, the waist type through-hole that is equipped with four equalling is followed outside the cavity and is regarded as the flow channel of liquid, 6 outermost circumferences of disk seat are equipped with 6 round through-holes, it is used for penetrating threaded fastener and connects input flange dish 15 and output flange dish 2, wherein 6 right-hand members of disk seat are input flange dish 15, the disk seat left end is output flange dish 2. The input flange 15 is in a step shape, the small end of the input flange is connected with a water inlet pipeline, a step through hole is formed in the input flange 15, the step of the input flange 15 is gradually increased along the liquid inflow direction, and the joint of the step through hole adopts a conical angle of 138.15 degrees to ensure the fastening and the fitting of a sealing cover of the valve core. The structure of the output flange plate 2 is basically similar to that of the input flange plate 15, the small end of the output flange plate is connected with a water outlet pipeline, the connection position of the stepped through hole of the output flange plate 2 adopts a 135-degree conical angle and then is connected with a 20.46-degree round angle, and the structure can reduce the flow resistance of liquid, reduce the pressure loss of fluid and ensure that the liquid flows out smoothly.

The valve core 10 is arranged in a step-shaped cavity in the valve seat 6, two sides of the circumference of the valve core are outwards protruded along the axial direction and the circumferential direction, air cavities are formed on two sides of the circumference of the valve core 10 by the axial protrusions, grooves are respectively arranged on the circumferential protrusions on the two sides, 4 phi 1 through holes which are uniformly distributed on the circumference are arranged in the grooves, and the through holes in the grooves are respectively communicated with the corresponding left and right air cavities and the vertical air passages on the valve seat 6. After an external air source is input into the right air passage, air pressure acts on the right air cavity to push the valve core 10 to move towards the left side, and the valve is opened; after an external air source is input from the left air passage, air pressure acts on the left air cavity to push the valve core 10 to move towards the right side, and the valve is closed. The uniform distribution of the through holes is beneficial to keeping the pressure uniform, so that the valve core 10 can run stably.

The valve core 10 extends to the right side along the axial direction, the front end of the extending part is provided with a valve core sealing cover 12 connected through threads, and the front end of the valve core sealing cover 12 is in a 147-degree taper angle, so that the valve core sealing cover 12 is tightly attached to the input flange 15. The front end of the valve core sealing cover 12 is also provided with a valve core fixing end cover 13, the valve core fixing end cover 13 is provided with symmetrical fastening hole positions, and fastening screws 14 are arranged in the fastening hole positions to lock the valve core sealing cover 12.

A sealing end cover 3 is further arranged between the left end of the cavity of the valve seat 6 and the output flange 2, and the sealing end cover 3 is provided with a blind hole. A valve seat output side sealing ring 5 is arranged between the output flange plate 2 and the valve seat 6, an end cover sealing ring 4 is arranged between the sealing end cover 3 and the valve seat 6, a valve core output side sealing ring 9 is arranged between the valve seat 6 and the valve core 10, a valve seat input side sealing ring 8 is arranged between the valve seat 6 and the input flange plate 15, a valve core input side sealing ring 11 is arranged between the valve core 10 and the valve core sealing cover 12, and an output flange sealing ring 1 and an input flange sealing ring 16 are respectively arranged on the outer sides of the output flange plate 2 and the.

The valve seat 6, the output flange 2, the input flange 15, the sealing end cover 3 and the valve core fixing end cover 13 are made of polyvinyl chloride, the valve core 10 is made of ultra-high molecular polyethylene, and the valve core sealing cover 12 is made of polytetrafluoroethylene.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, as various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the scope defined by the claims of the present invention shall be within the protection scope of the present invention.

Claims

1. A piston type reciprocating pneumatic valve is characterized by comprising a valve seat and a valve core, wherein a step cavity for installing the valve core and a liquid circulation through hole are arranged in the valve seat, two air passages for communicating the step cavity with the outside of the valve seat are arranged on the side wall of the valve seat, two air cavities are arranged on the valve core, the air cavities are respectively communicated with the two air passages through uniformly distributed holes, a valve core sealing cover is arranged at the position, extending out of the valve seat, of the valve core, the valve core sealing cover is connected with the valve core through threads, a sealing end cover is arranged on the other side surface, corresponding to the valve core sealing cover, of the valve seat, an output flange plate and an input flange plate are respectively arranged on the two sides of the valve seat, the output flange plate and the input flange plate are connected through threaded connecting pieces and tightly press the sealing end cover and the valve seat, and the input flange plate is communicated with the output flange plate through the liquid circulation through hole of the valve seat, the valve core slides in the valve seat to control the input flange plate to be communicated with and disconnected from the output flange plate.

2. The piston type reciprocating pneumatic valve as recited in claim 1, wherein the output flange, the end cap, the valve seat, the valve core and the input flange are provided with sealing rings at their contacting portions.

3. The piston type reciprocating pneumatic valve as recited in claim 2, further characterized in that a valve core fixing end cap is arranged at the extending portion of the valve core, the valve core fixing end cap compresses the valve core sealing cover, and the valve core fixing end cap is firmly connected with the valve core through a set screw.

4. The piston type reciprocating pneumatic valve as recited in claim 3, wherein the valve seat, the output flange, the input flange, the sealing end cap and the valve element fixing end cap are made of polyvinyl chloride, the valve element is made of polyethylene, and the valve element sealing cap is made of polytetrafluoroethylene.