Pneumatic valve

Abstract

The utility model relates to the technical field of valves, in particular to a pneumatic valve which comprises a valve body, a bonnet and a pneumatic assembly, the valve body is of an inverted-T-shaped structure, the bonnet is arranged in an upper port of the valve body and fixedly connected with the inner wall of the valve body through threads, a coupler is arranged in the valve body, a pressing ring is arranged on the lower portion of the coupler, and the pneumatic assembly is fixedly connected with the bonnet. A plurality of layers of diaphragms are arranged on the bottom face of the pressing ring, a valve clack is connected to the bottom face of the coupler, the pneumatic assembly comprises a cylinder body, an integrated linkage mode is adopted in a valve element of the steel cylinder valve, silicone oil in a cavity in the cylinder body is extruded through the pneumatic assembly, and the piston drives the coupler and the valve clack to do piston motion. The valve clack and the piston move synchronously to complete opening and closing of the steel cylinder valve, the overall sealing performance is improved through cooperation of the multiple layers of diaphragms and the multiple sets of sealing rings, use convenience is improved, and the service life of the steel cylinder valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a pneumatic valve. Background Art

[0002] Cylinder valves are widely used in various industries, including electronic gases, petrochemical gases, and standard gases, all with specialized performance requirements. Diaphragm valves, used to control the on / off transmission of the medium, are key components in specialty gas delivery systems. Currently, diaphragm valves for specialty gases require manual opening and closing, resulting in complex operation, imprecise control, and potential safety hazards. These valves cannot meet the transmission and control requirements of high-purity and ultra-high-purity specialty gases.

[0003] With the development of the industry, the demand for specialty gases continues to increase. Nowadays, there is a lack of a pneumatic stop valve for specialty gases that can meet the requirements of good sealing effect, avoid manual control, high operation accuracy, and meet the transmission and control needs of high-purity and ultra-high-purity specialty gases. Utility Model Content

[0004] The purpose of the utility model is to address the deficiencies of the existing technology and to provide a pneumatic valve. The valve core of the cylinder valve adopts an integrated linkage mode, and the silicone oil in the internal cavity of the cylinder body is squeezed by the pneumatic component, so that the piston drives the coupling and the valve disc to perform piston movement. The valve disc and the piston move synchronously to complete the opening and closing of the cylinder valve, and the overall sealing performance is improved by the cooperation of several layers of diaphragms and multiple groups of sealing rings, thereby improving the convenience of use and increasing the service life of the cylinder valve.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A pneumatic valve comprises a valve body, a valve bonnet, and a pneumatic component, wherein the valve body is an inverted "T"-shaped structure, the valve bonnet is arranged inside the upper port of the valve body, the valve bonnet is fixedly connected to the inner wall of the valve body by a thread, a coupling is arranged inside the valve body, a pressure ring is arranged at the lower part of the coupling, several layers of diaphragms are arranged on the bottom surface of the pressure ring, a valve disc is connected to the bottom surface of the coupling, the pneumatic component comprises a cylinder body, the lower end of the cylinder body is fixedly connected to the outer wall of the upper port of the valve body, an air inlet is arranged at the top of the cylinder body, a locking pressure ring is arranged inside the cylinder body, the interior of the pneumatic component is divided into an upper cylinder body and a lower cylinder body by the locking pressure ring, a first piston is arranged inside the upper cylinder body of the pneumatic component, the lower part of the first piston is fixedly connected to the piston rod, a second piston is arranged inside the lower cylinder body of the pneumatic component, and a butterfly spring is arranged between the second piston and the locking pressure ring.

[0007] Furthermore, a first sealing ring is provided between the outer side wall of the valve cap and the inner side wall of the valve body, and a second sealing ring is provided between the outer side wall of the coupling and the inner side wall of the valve cap.

[0008] Furthermore, a third sealing ring is provided between the outer wall surface of the first piston and the inner wall surface of the cylinder body, and a fourth sealing ring is provided between the outer wall surface of the second piston and the inner wall surface of the cylinder body.

[0009] Furthermore, a cavity is provided inside the second piston, the lower part of the piston rod passes through the locking ring and is slidably connected to the cavity inside the second piston, and a fifth sealing ring is provided between the outer wall of the lower part of the piston rod and the side wall surface of the cavity inside the second piston.

[0010] Furthermore, a sixth sealing ring is provided between the outer side wall of the lower portion of the second piston and the inner wall surface of the lower portion of the cylinder body.

[0011] Furthermore, the upper portion of the coupling is fixedly connected to the bottom surface of the second piston.

[0012] Furthermore, a through structure is formed between the cavity inside the second piston and the cylinder body at the lower portion of the second piston, and silicone oil is provided inside the cavity.

[0013] The beneficial effects of the utility model are:

[0014] 1. A pneumatic valve adopts an integrated linkage method inside the valve core and sets a double-layer cylinder body inside the pneumatic component. The first piston inside the upper cylinder body squeezes the silicone oil inside the lower cylinder body cavity. As the silicone oil inside the cavity flows, it pushes the second piston to drive the coupling and the valve disc to perform piston movement. The valve disc and the piston move synchronously to complete the opening of the cylinder valve; as the first piston is retracted, the silicone oil inside the cavity flows in the opposite direction. Cooperating with the elastic force of the butterfly spring inside the lower cylinder body, it pushes the second piston to drive the coupling and the valve disc to perform reverse piston movement. The valve disc and the piston move synchronously to complete the closing of the cylinder valve, thereby conveniently completing the precise cut-off control of high-purity and ultra-high-purity specialty gases.

[0015] 2. A pneumatic valve, which, by disposing a multi-layer diaphragm at the lower portion of the piston, prevents corrosive media from flowing to the upper portion of the valve body and corroding internal components during use. The cooperation of the first, second, third, fourth, fifth, and sixth sealing rings improves the sealing performance of the cylinder valve, preventing external media from entering the valve body and contaminating the controlled medium, thereby improving the overall performance and service life of the cylinder valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0018] Figure 3 It is a cross-sectional schematic diagram of the utility model in another direction. DETAILED DESCRIPTION

[0019] The following is combined with Figures 1 to 3 The principles and features of the present invention are described, and the examples provided are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are greatly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "and / or / some" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] like Figures 1 to 3 As shown: The utility model is a pneumatic valve, including a valve body 1, a valve bonnet 2, and a pneumatic assembly 3. The valve body 1 is an inverted "T" shaped structure. The valve bonnet 2 is arranged inside the upper port of the valve body 1. The valve bonnet 2 is fixedly connected to the inner wall of the valve body 1 through a thread. A coupling 4 is arranged inside the valve body 1. A pressure ring 5 is arranged at the lower part of the coupling 4. Several layers of diaphragms 50 are arranged on the bottom surface of the pressure ring 5. A valve disc 6 is connected to the bottom surface of the coupling 4. The pneumatic assembly 3 includes a cylinder 30. The lower end of the cylinder 30 is connected to the upper part of the valve body 1. The outer wall of the port is fixedly connected, an air inlet 300 is provided at the top of the cylinder body 30, a locking pressure ring 31 is provided inside the cylinder body 30, and the interior of the pneumatic component 3 is divided into an upper cylinder body and a lower cylinder body by the locking pressure ring 31. A first piston 32 is provided inside the upper cylinder body of the pneumatic component 3, and a piston rod 33 is fixedly connected to the lower part of the first piston 32. A second piston 34 is provided inside the lower cylinder body of the pneumatic component 3, and a butterfly spring 35 is provided between the second piston 34 and the locking pressure ring 31.

[0022] A first sealing ring 20 is also provided between the outer wall of the valve bonnet 2 and the inner wall of the valve body 1, and a second sealing ring 40 is also provided between the outer wall of the coupling 4 and the inner wall of the valve bonnet 2. The first sealing ring 20 and the second sealing ring 40 can effectively isolate the valve body 1 and the coupling 4 from the pneumatic component 3 to prevent the fluid inside the valve body 1 from leaking into the pneumatic component 3.

[0023] A third sealing ring 320 is provided between the outer wall surface of the first piston 32 and the inner wall surface of the cylinder body 30, and a fourth sealing ring 340 is provided between the outer wall surface of the second piston 34 and the inner wall surface of the cylinder body 30. The third sealing ring 320 can form a sealed piston mechanism between the first piston 32 and the inner wall surface of the cylinder body 30, so that the first piston 32 completes the piston movement inside the upper cylinder body of the pneumatic component 3. The fourth sealing ring 340 can form a sealed piston mechanism between the second piston 34 and the inner wall surface of the cylinder body 30 to prevent the silicone oil inside the cavity 301 from leaking upward.

[0024] A cavity 301 is provided inside the second piston 34, and the lower part of the piston rod 33 passes through the locking ring 31 and is slidably connected to the cavity 301 inside the second piston 34. A fifth sealing ring 330 is provided between the outer wall of the lower part of the piston rod 33 and the side wall surface of the cavity 301 inside the second piston 34. The fifth sealing ring 330 can form a sealed piston mechanism between the lower part of the piston rod 33 and the cavity 301 inside the second piston 34, so that the piston rod 33 performs piston motion inside the cavity 301 inside the second piston 34.

[0025] A sixth sealing ring 341 is provided between the outer wall of the lower part of the second piston 34 and the inner wall surface of the lower part of the cylinder body 30. The sixth sealing ring 341 effectively forms a sealing mechanism between the lower part of the second piston 34 and the lower part of the cylinder body 30 to prevent the silicone oil inside the cavity 301 from leaking downward.

[0026] The upper portion of the coupling 4 is fixedly connected to the bottom surface of the second piston 34, so that the coupling 4 can drive the valve disc 6 to move up and down synchronously with the second piston 34, thereby achieving the purpose of controlling the pneumatic cutoff of the valve body.

[0027] There is a through structure between the cavity 301 inside the second piston 34 and the cylinder body at the lower part of the second piston 34. According to the piston movement of the piston rod 33, the silicone oil inside the cavity 301 is squeezed, so that the silicone oil flows to the lower part of the second piston 34. The flow of silicone oil inside the cavity 301 can drive the second piston 34 to move upward.

[0028] The utility model discloses a pneumatic valve whose valve core adopts an integrated linkage mode, and the silicone oil in the internal cavity of the cylinder body is squeezed by the pneumatic component, so that the piston drives the coupling and the valve disc to perform piston movement. The valve disc and the piston move synchronously to complete the opening and closing of the cylinder valve, and the overall sealing performance is improved by the cooperation of several layers of diaphragms and multiple groups of sealing rings, thereby improving the convenience of use and increasing the service life of the cylinder valve.

[0029] The working principle of this utility model:

[0030] Close the valve: through the butterfly spring 35 generates the elastic force downward, the second piston 34 is pressed downward, the second piston 34 drives the coupling 4, the compression ring 5, the valve clack 6 synchronous downward movement, the valve clack 6 lower end face close to the valve body inlet, close the valve;

[0031] Open the valve: the air inlet 300 of the top of pneumatic assembly 3 is connected with 0.5MPa air, the compressed air drives the first piston 32 to move downward, the first piston 32 connects the piston rod 33 and extrudes the silicone oil in the cavity 301, the volume of the silicone oil is fixed in the closed space and cannot be changed, the silicone oil is pushed upward by the second piston 34 under the action of pressure, drives the coupling 4, the compression ring 5, the valve clack 6 synchronous upward movement, offsets the elastic force of the butterfly spring 35, the lower end surface of the valve clack 6 leaves the valve body inlet, opens the valve.

[0032] The above only is the preferred embodiment of the present application, therefore, equivalent changes or modifications made to the structure, features and principles described in the patent application range of the present application are included in the patent application range of the present application.

Claims

1. A pneumatic valve, comprising a valve body (1), a valve cap (2), and a pneumatic assembly (3), characterized in that: The valve body (1) is an inverted "T"-shaped structure. The valve cap (2) is arranged inside the upper port of the valve body (1). The valve cap (2) is fixedly connected to the inner wall of the valve body (1) through a thread. A coupling (4) is arranged inside the valve body (1). A pressure ring (5) is arranged at the lower part of the coupling (4). A plurality of layers of diaphragms (50) are arranged on the bottom surface of the pressure ring (5). A valve flap (6) is connected to the bottom surface of the coupling (4). The pneumatic component (3) includes a cylinder (30). The lower end of the cylinder (30) is fixedly connected to the outer wall of the upper port of the valve body (1). The cylinder An air inlet (300) is provided at the top of (30), a locking ring (31) is provided inside the cylinder (30), and the interior of the pneumatic assembly (3) is divided into an upper cylinder and a lower cylinder by the locking ring (31). A first piston (32) is provided inside the upper cylinder of the pneumatic assembly (3), and a piston rod (33) is fixedly connected to the lower part of the first piston (32). A second piston (34) is provided inside the lower cylinder of the pneumatic assembly (3), and a butterfly spring (35) is provided between the second piston (34) and the locking ring (31).

2. A pneumatic valve according to claim 1, characterized in that: A first sealing ring (20) is further provided between the outer side wall of the valve cap (2) and the inner side wall of the valve body (1), and a second sealing ring (40) is further provided between the outer side wall of the coupling (4) and the inner side wall of the valve cap (2).

3. The pneumatic valve according to claim 1, characterized in that: A third sealing ring (320) is provided between the outer wall surface of the first piston (32) and the inner wall surface of the cylinder body (30), and a fourth sealing ring (340) is provided between the outer wall surface of the second piston (34) and the inner wall surface of the cylinder body (30).

4. The pneumatic valve according to claim 1, characterized in that: A cavity (301) is provided inside the second piston (34), and the lower portion of the piston rod (33) passes through the locking ring (31) and is slidably connected to the cavity (301) inside the second piston (34). A fifth sealing ring (330) is provided between the outer wall of the lower portion of the piston rod (33) and the side wall surface of the cavity (301) inside the second piston (34).

5. The pneumatic valve according to claim 1, characterized in that: A sixth sealing ring (341) is provided between the outer side wall of the lower portion of the second piston (34) and the inner side wall of the lower portion of the cylinder body (30).

6. The pneumatic valve according to claim 1, characterized in that: The upper portion of the coupling (4) is fixedly connected to the bottom surface of the second piston (34).

7. The pneumatic valve according to claim 1, characterized in that: A through structure is formed between the cavity (301) inside the second piston (34) and the cylinder body below the second piston (34), and silicone oil is provided inside the cavity (301).

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