Pneumatic steel cylinder valve

Abstract

The pneumatic steel cylinder valve comprises a valve body and a pneumatic assembly, a valve bonnet is arranged in the valve body, a coupler is arranged in the valve bonnet, a pressing ring is arranged on the lower portion of the coupler, a diaphragm is arranged on the bottom face of the pressing ring, a valve clack is arranged on the lower portion of the diaphragm, and the upper portion of the valve clack is fixedly connected with the coupler. The lower portion of the cylinder body is fixedly connected with the upper portion of the valve body, an air cylinder core, a piston ring, a piston baffle ring and a belleville spring are arranged in the cylinder body, an air cylinder cover is arranged on the upper portion of the cylinder body, and a coupler in a valve core of the pneumatic valve is of an integrated linkage structure with a piston and is driven through a pneumatic assembly. The piston drives the coupler and the valve clack to do piston motion, and the valve clack and the piston synchronously move to complete opening and closing of the pneumatic valve; and the integrated coupler is connected with the air cylinder core through the fixing bolt, connection between the pneumatic assembly and the valve body can be quickly disassembled, the convenience of mounting and dismounting is improved, and maintenance is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and specifically to a pneumatic cylinder valve. Background Technology

[0002] Pneumatic valves have wide applications in various industries with special performance requirements for gases, such as electronic gases, petrochemical gases, and standard gases. Diaphragm valves, used to control the switching and transmission of media in special gas delivery systems, are key components. Currently, diaphragm valves for special gases still require manual opening and closing, which is complex, lacks precision, and poses certain safety hazards due to manual operation. This makes it difficult to meet the requirements of gas cylinders for product safety, reliability, efficiency, and ease of adjustment.

[0003] With the development of the industry, the demand for specialty gases is constantly increasing. Currently, there is a lack of pneumatic shut-off valves for specialty gases that meet the requirements of good sealing effect, avoidance of manual control, high operation accuracy, and transmission control of high-purity and ultra-high-purity specialty gases. In addition, some pneumatic valves have unreasonable structural designs, and the installation and disassembly of pneumatic components and valve bodies are relatively complicated, which increases the difficulty of installation and disassembly and makes maintenance inconvenient. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by providing a pneumatic cylinder valve. The valve core internal coupling of this pneumatic valve adopts an integrated linkage structure with the piston and is driven by a pneumatic component. This causes the piston to drive the coupling and the valve disc to move synchronously, thus completing the opening and closing of the pneumatic valve. Furthermore, the integrated coupling is connected to the cylinder core by fixing bolts, which allows for quick disassembly of the pneumatic component and the valve body, increasing the convenience of installation and disassembly, and facilitating maintenance.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pneumatic cylinder valve includes a valve body and a pneumatic assembly, characterized in that: a valve cap is provided inside the valve body, a coupling is provided inside the valve cap, a pressure ring is provided at the lower part of the coupling, a diaphragm is provided on the bottom surface of the pressure ring, a valve disc is provided at the lower part of the diaphragm, and the upper part of the valve disc is fixedly connected to the coupling; the pneumatic assembly includes a cylinder body, the lower part of the cylinder body is fixedly connected to the upper part of the valve body, a cylinder core, a piston ring, a piston retaining ring, and a disc spring are provided inside the cylinder body, a cylinder cover is provided at the upper part of the cylinder body, a valve inlet is provided at the bottom of the valve body, a valve outlet is provided on the side of the valve body, a leakage detection hole is provided on the other side of the valve body, and a cylinder connector is provided at the upper part of the pneumatic assembly.

[0007] The cylinder core is a tubular structure located at the center of the cylinder body. The upper end of the coupling is located inside the tubular body of the cylinder core, and the top end of the coupling is connected to the top of the cylinder core by fixing bolts.

[0008] The piston rings inside the cylinder are arranged in three sets at equal intervals, and the piston retaining rings inside the cylinder are arranged in two sets, with the two sets of piston retaining rings alternately arranged between the three sets of piston rings.

[0009] A sealing ring is provided at the connection between the upper part of the valve body and the cylinder body. A sealing ring is provided between the outer side wall of the valve cap and the inner side wall of the upper part of the valve body. A sealing ring is provided between the inner side wall of the valve cap and the outer side wall of the coupling.

[0010] The outer ring of the piston retaining ring is fixedly connected to the inner wall of the cylinder, and a sealing ring is provided between the inner ring of the piston retaining ring and the outer wall of the inner ring of the piston ring.

[0011] A sealing ring is provided between the outer ring of the piston ring and the inner wall of the cylinder, and a sealing ring is provided between the inner ring of the piston ring and the outer wall of the cylinder core.

[0012] The cylinder core tube structure has air holes on its tube body, and the piston ring has a channel on its lower inner ring side. The air holes on the cylinder core are correspondingly arranged with the channel on the lower inner ring side of the piston ring.

[0013] The cylinder head is fixedly connected to the cylinder block. The disc spring is disposed between the cylinder head and the piston ring. A locking nut is threadedly connected to the upper part of the cylinder head. A cylinder connector is disposed at the center of the locking nut. The lower part of the cylinder connector is disposed corresponding to the inner ring of the piston ring. A sealing ring is disposed between the outer wall surface of the cylinder connector and the inner wall surface of the locking nut.

[0014] The cylinder head has a ring array of positioning holes on its upper part. A retaining ring is also provided between the cylinder head and the locking nut. The side of the locking nut has a positioning groove. The retaining ring has a boss and a pin. The positioning groove is provided in correspondence with the boss, and the pin is provided in correspondence with the positioning hole.

[0015] The lower part of the cylinder core is movably connected to the valve cap, and a sealing ring is provided between the outer wall surface of the lower part of the cylinder core and the inner wall surface of the valve cap. The upper part of the cylinder core is movably connected to the cylinder connector, and a sealing ring is provided between the outer wall surface of the upper part of the cylinder core and the inner wall surface of the cylinder connector.

[0016] The beneficial effects of this utility model are:

[0017] 1. This pneumatic valve employs an integrated piston-piston coupling within the valve core, creating a multi-layered piston structure within the pneumatic assembly. By supplying air to the cylinder connector, gas is dispersed from the air holes on the cylinder core to the lower parts of each piston layer, causing the pistons to lift the cylinder core. The coupling, following the cylinder core, then synchronously lifts the valve disc, opening the valve. Conversely, when the cylinder connector is closed, the lower part of the piston experiences no gas pressure. This pressure, combined with the spring force of the disc spring inside the cylinder head, pushes the piston to descend the cylinder core in the opposite direction. The coupling, following the cylinder core, then synchronously descends the valve disc, closing the valve. This allows for convenient and precise shut-off control of high-purity and ultra-high-purity specialty gases.

[0018] 2. This pneumatic valve structure extends the coupling to the upper part of the cylinder core and connects it to the cylinder core using fixing bolts. The coupling can be installed and disassembled through the upper part of the pneumatic assembly, allowing for quick disassembly of the connection between the pneumatic assembly and the valve body. This increases the ease of installation and disassembly, facilitating maintenance. The sealing rings between the components improve the valve's sealing performance, preventing air leakage and avoiding contamination of the controlled medium by external media entering the valve body. This enhances the overall performance and service life of the pneumatic valve. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0021] Figure 3 This is an exploded view of the present invention. Detailed Implementation

[0022] The following is in conjunction with the appendix Figures 1 to 3 The principles and features of this utility model are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or / several" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] like Figures 1 to 3 As shown: This utility model discloses a pneumatic cylinder valve, including a valve body 1 and a pneumatic assembly 2. The valve body 1 has a valve cap 11 inside, and a coupling 12 inside the valve cap 11. A pressure ring 14 is provided at the lower part of the coupling 12, and a diaphragm 15 is provided on the bottom surface of the pressure ring 14. A valve disc 13 is provided at the lower part of the diaphragm 15, and the upper part of the valve disc 13 is fixedly connected to the coupling 12. The pneumatic assembly 2 includes a cylinder body 21, the lower part of which is fixedly connected to the upper part of the valve body 1. The cylinder body 21 has a cylinder core 20, a piston ring 22, a piston retaining ring 23, and a disc spring 24 inside, and a cylinder head 25 is provided at the upper part of the cylinder body 21. The bottom of the valve body 1 is provided with a valve inlet 110, the side of the valve body 1 is provided with a valve outlet 120, and the other side of the valve body 1 is provided with a leakage detection hole 130, which is used to detect whether leakage will occur inside the pneumatic valve. The upper part of the pneumatic assembly 2 is provided with a cylinder connector 26, which is used to connect to an external air source.

[0025] The cylinder core 20 is a tubular structure located at the center of the cylinder body 21. The upper end of the coupling 12 is located inside the tubular body of the cylinder core 20, and the top of the coupling 12 is connected to the top of the cylinder core 20 by a fixing bolt 210. The valve body 1 and the pneumatic assembly 2 can be separated by removing the fixing bolt 210, which increases the convenience of installation and disassembly and facilitates maintenance. The integrated coupling 12 is connected to the cylinder core 20, and the pneumatically drives the piston ring 22 and the cylinder core 20, so that the piston drives the coupling 12 and the valve disc 13 to move. The valve disc 13 moves synchronously with the coupling 12 and the cylinder core 20 to complete the opening and closing of the pneumatic valve.

[0026] The piston rings 22 inside the cylinder body 21 are arranged in three sets at equal intervals, and the piston retaining rings 23 inside the cylinder body 21 are arranged in two sets. The two sets of piston retaining rings 23 are alternately arranged between the three sets of piston rings 22. The arrangement of multiple sets of piston rings 22 forms multiple sets of piston cylinders, which improves the precision and flexibility of the pneumatic components, makes the valve opening and closing control precise and flexible, and prevents jamming.

[0027] A sealing ring 30 is provided at the connection between the upper part of the valve body 1 and the cylinder body 21 to prevent air leakage at the connection between the upper part of the valve body 1 and the cylinder body 21. A sealing ring 30 is provided between the outer side wall of the valve cap 11 and the inner side wall of the upper part of the valve body 1 to prevent the fluid medium passing through the valve body 1 from leaking into the interior of the cylinder body 21. A sealing ring 30 is provided between the inner side wall of the valve cap 11 and the outer side wall of the coupling 12 to prevent the fluid medium passing through the valve body 1 from leaking into the interior of the cylinder core 20 of the upper part of the coupling 12.

[0028] The outer ring of the piston retaining ring 23 is fixedly connected to the inner wall of the cylinder body 21. A sealing ring 30 is provided between the inner ring of the piston retaining ring 23 and the outer wall of the inner ring of the piston ring 22. The cooperation of the sealing ring improves the sealing performance inside the pneumatic assembly 2 and prevents air leakage between the valve body of the multi-layer piston rings 22.

[0029] A sealing ring 30 is provided between the outer ring of the piston ring 22 and the inner wall of the cylinder 21, and a sealing ring 30 is provided between the inner ring of the piston ring 22 and the outer wall of the cylinder core 20. The cooperation of the sealing rings improves the sealing performance between the piston ring 22 and the cylinder 21, thereby improving the precision performance of piston movement.

[0030] The cylinder core 20 has a tubular structure with air holes 201 on its body. The piston ring 22 has a channel 221 on its lower inner ring side. The air holes 201 on the cylinder core 20 are corresponding to the channel 221 on the lower inner ring side of the piston ring 22. After the pneumatic assembly 2 receives air from the cylinder connector 26, it passes through the cylinder core 20 and is gradually dispersed to the corresponding piston ring 22 by the air holes 201 on the cylinder core 20. The air is then dispersed by the channel 221 on the lower side of the piston ring 22.

[0031] The cylinder head 25 is fixedly connected to the cylinder body 21. The butterfly spring 24 is disposed between the cylinder head 25 and the piston ring 22. The butterfly spring 24 applies a downward elastic force to the piston ring 22 to push the cylinder core 20 and drive the valve disc 13 to descend synchronously. The downward movement of the valve disc 13 completes the closure of the valve. The upper part of the cylinder head 25 is threadedly connected to a locking nut 27. A cylinder connector 26 is disposed at the center of the locking nut 27. The lower part of the cylinder connector 26 is correspondingly disposed with the inner ring of the piston ring 22. The locking nut 27 can be manually rotated to adjust the position of the cylinder connector 26. The position of the cylinder connector 26 can restrict the movement space of the piston ring 22. A sealing ring 30 is disposed between the outer wall surface of the cylinder connector 26 and the inner wall surface of the locking nut 27 to prevent air leakage from the outside of the cylinder connector 26.

[0032] The upper annular array of cylinder head 25 is provided with positioning holes 250. A retaining ring 28 is also provided between cylinder head 25 and locking nut 27. The side of locking nut 27 is provided with positioning groove 270. The retaining ring 28 is provided with boss 280 and pin 281. Positioning groove 270 and boss 280 are correspondingly provided, and pin 281 is correspondingly provided with positioning hole 250. Pin 281 can block the rotation of retaining ring 28. Boss 280 on retaining ring 28 blocks the rotation of locking nut 27, limiting cylinder connector 26 at the center of locking nut 27, thereby controlling the stroke of piston ring 22 at the lower part of cylinder connector 26.

[0033] The lower part of the cylinder core 20 is movably connected to the valve cap 11, and a sealing ring 30 is provided between the outer wall surface of the lower part of the cylinder core 20 and the inner wall surface of the valve cap 11. The upper part of the cylinder core 20 is movably connected to the cylinder connector 26, and a sealing ring 30 is provided between the outer wall surface of the upper part of the cylinder core 20 and the inner wall surface of the cylinder connector 26. The cooperation of the sealing ring improves the sealing performance of the pneumatic valve and prevents air leakage from the valve body.

[0034] The working principle of this utility model:

[0035] Opening the valve: The cylinder connector 26 on the pneumatic assembly 2 is vented, and the gas is dispersed to the lower part of each layer of piston ring 22 through the air hole 201 on the cylinder core 20 and the channel 221 at the bottom of the piston ring 22. The piston ring 22 receives the tension of the gas and drives the cylinder core 20 to be lifted. The coupling 12 follows the cylinder core 20 and drives the valve disc 13 to be lifted synchronously. The upward movement of the valve disc 13 completes the opening of the valve.

[0036] Valve closure: By closing the airflow from the pneumatic assembly 2 to the cylinder connector 26, there is no gas tension at the lower part of the piston ring 22. At this time, in conjunction with the elastic force of the disc spring 24 inside the cylinder head 25, the disc spring 24 pushes the piston ring 22 to drive the cylinder core 20 to descend in the opposite direction in sync. The coupling 12 follows the cylinder core 20 and drives the valve disc 13 to descend in sync. The downward movement of the valve disc 13 completes the closure of the valve.

[0037] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A pneumatic cylinder valve, comprising a valve body (1) and a pneumatic assembly (2), characterized in that: The valve body (1) is provided with a valve cap (11) inside, and a coupling (12) is provided inside the valve cap (11). A pressure ring (14) is provided at the lower part of the coupling (12), and a diaphragm (15) is provided on the bottom surface of the pressure ring (14). A valve disc (13) is provided at the lower part of the diaphragm (15). The upper part of the valve disc (13) is fixedly connected to the coupling (12). The pneumatic assembly (2) includes a cylinder (21), and the lower part of the cylinder (21) is fixedly connected to the upper part of the valve body (1). The cylinder body (21) is equipped with a cylinder core (20), piston ring (22), piston retaining ring (23), and butterfly spring (24). The cylinder body (21) is equipped with a cylinder head (25) at the top. The valve body (1) is equipped with a valve inlet (110) at the bottom. The valve body (1) is equipped with a valve outlet (120) on the side. The valve body (1) is equipped with a leakage detection hole (130) on the other side. The pneumatic assembly (2) is equipped with a cylinder connector (26) at the top.

2. The pneumatic cylinder valve according to claim 1, characterized in that: The cylinder core (20) is a tubular structure located at the center of the cylinder body (21). The upper end of the coupling (12) is located inside the tube of the cylinder core (20), and the top end of the coupling (12) is connected to the top of the cylinder core (20) by a fixing bolt (210).

3. A pneumatic cylinder valve according to claim 1, characterized in that: The piston rings (22) inside the cylinder (21) are arranged in three sets at equal intervals, and the piston retaining rings (23) inside the cylinder (21) are arranged in two sets, with the two sets of piston retaining rings (23) alternately arranged between the three sets of piston rings (22).

4. A pneumatic cylinder valve according to claim 1, characterized in that: A sealing ring (30) is provided at the connection between the upper part of the valve body (1) and the cylinder body (21). A sealing ring (30) is provided between the outer side wall of the valve cap (11) and the inner side wall of the upper part of the valve body (1). A sealing ring (30) is provided between the inner side wall of the valve cap (11) and the outer side wall of the coupling (12). The outer ring of the piston retaining ring (23) is fixedly connected to the inner wall of the cylinder (21), and a sealing ring (30) is provided between the inner ring of the piston retaining ring (23) and the outer wall of the inner ring of the piston ring (22). A sealing ring (30) is provided between the outer ring of the piston ring (22) and the inner wall of the cylinder (21), and a sealing ring (30) is provided between the inner ring of the piston ring (22) and the outer wall of the cylinder core (20).

5. A pneumatic cylinder valve according to claim 1, characterized in that: The cylinder core (20) has a tube body with a vent (201) and the piston ring (22) has a channel (221) on the lower side of the inner ring. The vent (201) on the cylinder core (20) corresponds to the channel (221) on the lower side of the inner ring of the piston ring (22).

6. A pneumatic cylinder valve according to claim 1, characterized in that: The cylinder head (25) is fixedly connected to the cylinder body (21). The disc spring (24) is disposed between the cylinder head (25) and the piston ring (22). The upper part of the cylinder head (25) is threaded with a locking nut (27). A cylinder connector (26) is disposed at the center of the locking nut (27). The lower part of the cylinder connector (26) is disposed corresponding to the inner ring of the piston ring (22). A sealing ring (30) is disposed between the outer wall surface of the cylinder connector (26) and the inner wall surface of the locking nut (27).

7. A pneumatic cylinder valve according to claim 1, characterized in that: The cylinder head (25) has a positioning hole (250) arranged in an annular array on the upper part. A retaining ring (28) is also provided between the cylinder head (25) and the locking nut (27). A positioning groove (270) is provided on the side of the locking nut (27). A boss (280) and a pin (281) are provided on the retaining ring (28). The positioning groove (270) is correspondingly provided with the boss (280), and the pin (281) is correspondingly provided with the positioning hole (250).

8. A pneumatic cylinder valve according to claim 1, characterized in that: The lower part of the cylinder core (20) is movably connected to the valve cap (11), and a sealing ring (30) is provided between the outer wall surface of the lower part of the cylinder core (20) and the inner wall surface of the valve cap (11). The upper part of the cylinder core (20) is movably connected to the cylinder connector (26), and a sealing ring (30) is provided between the outer wall surface of the upper part of the cylinder core (20) and the inner wall surface of the cylinder connector (26).

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