A long-life diaphragm valve

Abstract

The utility model discloses a long -life diaphragm valve, including valve body, actuator and solenoid valve, actuator fixedly connected on valve body upper end, and the upper end of actuator is provided with air inlet and installs the air inlet joint at air inlet, solenoid valve is connected with air inlet joint through support, and there is interval space between solenoid valve and actuator, long -life diaphragm valve of the utility model, and the solenoid valve is separated through interval space between actuator, can maximumly limit heat transfer to solenoid valve, avoids high temperature damage solenoid valve, improves solenoid valve life.

Description

Technical Field

[0001] This utility model relates to the technical field of diaphragm valves, and in particular to a long-life diaphragm valve. Background Technology

[0002] A diaphragm valve is a shut-off valve that uses a diaphragm as its opening and closing element to close the flow path, cut off the fluid, and separate the valve body cavity from the valve cover cavity. Diaphragms are commonly made of elastic, corrosion-resistant, and impermeable materials such as rubber and plastic. The most prominent feature of a diaphragm valve is that the diaphragm separates the lower valve body cavity from the upper valve cover cavity, protecting the valve stem, valve disc, and other components located above the diaphragm from media corrosion. This eliminates the need for a packing seal structure and prevents media leakage.

[0003] A diaphragm valve includes a valve body, an actuator mounted on the valve body, and a solenoid valve connected to the actuator. Existing diaphragm valves have the following drawbacks: 1. When a high-temperature medium flows through the valve body, the heat will be conducted to the actuator. However, the existing solenoid valve is attached to the outer periphery or end face of the solenoid valve, which will cause the solenoid valve to be affected by high temperature, resulting in a shorter service life. 2. The piston inside the actuator is prone to wear during its reciprocating motion, which can lead to poor sealing of the actuator and thus affect its service life. Summary of the Invention

[0004] The purpose of this invention is to provide a long-life diaphragm valve. The solenoid valve and the actuator are separated by a gap, which can minimize the heat transfer to the solenoid valve, avoid high temperature damage to the solenoid valve, and improve the service life of the solenoid valve.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a high-life diaphragm valve, comprising a valve body, an actuator and a solenoid valve, wherein the actuator is fixedly connected to the upper end of the valve body, the upper end of the actuator is provided with an air inlet and an air inlet connector installed at the air inlet, the solenoid valve is connected to the air inlet connector through a bracket, and a gap space is left between the solenoid valve and the actuator.

[0006] Furthermore, the actuator includes a housing and pistons A, B, and C arranged from top to bottom within the housing. The upper end of the housing is provided with a cylindrical portion, and the cylindrical portion is provided with an air intake channel communicating with an air inlet. Piston A has a first protrusion extending into the cylindrical portion. An elastic element is provided between the housing and piston A. The lower end of the housing corresponding to piston B is provided with a limiting step. Piston B is provided with a clearance channel. The upper end of piston C is provided with a second protrusion passing through the clearance channel and abutting against piston A. The lower end of piston C is provided with a third protrusion. The second protrusion is provided with a first air passage communicating with the air intake channel, and the third protrusion is provided with a second air passage communicating with the air intake channel. Bushings are respectively provided on the outer periphery of piston A, the first protrusion, the second protrusion, and the third protrusion.

[0007] Furthermore, sealing rings are provided between the first protrusion and the cylindrical body, between the second protrusion and the piston B, between the third protrusion and the housing, between the piston A and the housing, between the piston B and the housing, and between the piston C and the housing.

[0008] Furthermore, the housing is provided with a position sensor that extends into the housing, the position sensor being used to detect the position of piston A.

[0009] Furthermore, the bracket has an L-shaped structure, including a horizontal part and a vertical part. The horizontal part is inserted and fitted with the air inlet connector, and the vertical part is used to install the solenoid valve. The horizontal part and the vertical part are separated from the actuator by a gap space.

[0010] Furthermore, a first exhaust passage is provided in the housing at the position between piston B and piston C, a chamber A is formed between piston A and piston B, and chamber A is isolated from the first exhaust passage by piston B. A chamber B is formed between the lower part of piston C and the housing, and chamber B is isolated from the first exhaust passage by piston C.

[0011] Furthermore, a heat insulation component is provided between the valve body and the actuator. The heat insulation component includes a connecting sleeve for connecting the valve body and the actuator, and a heat insulation rod slidably disposed in the connecting sleeve. The upper end of the heat insulation rod abuts against the third protrusion, and the lower end of the heat insulation component abuts against the top block inside the valve body.

[0012] Furthermore, both the connecting sleeve and the heat insulation rod are made of materials with low thermal conductivity.

[0013] Furthermore, the valve body is provided with a valve body, a valve seat disposed within the valve body, a diaphragm for cooperating with the valve seat, and a top block abutting against the upper end of the diaphragm. The top block abuts against the heat insulation rod. The valve body is provided with an inlet and an outlet. The valve body is provided with a second exhaust channel corresponding to the upper end of the diaphragm.

[0014] Furthermore, the upward stroke of piston A is L1, and the distance between the end face of piston C and the end face of piston B is L2, where L1≤L2.

[0015] In summary, this utility model has the following beneficial effects: 1. The high-life diaphragm valve of this utility model has a space between the solenoid valve and the actuator, which can minimize the heat transfer to the solenoid valve, avoid high temperature damage to the solenoid valve, and improve the service life of the solenoid valve. 2. The high-life diaphragm valve of this utility model has bearings set on the outer periphery of piston A, the first convex post, the second convex post and the third convex post respectively. The bushings have new lubricity. By setting the bushings, piston A and piston C can be prevented from being scratched and worn during the movement, thus avoiding poor sealing of the actuator and improving the service life of the actuator. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] In the diagram: 10. Valve body; 11. Valve body; 12. Valve seat; 13. Diaphragm; 14. Top block; 15. Second exhaust passage; 20. Actuator; 21. Air inlet; 22. Air inlet connector; 23. Housing; 231. Cylinder section; 232. Limiting step; 233. Position sensor; 234. First exhaust passage; 235. Chamber A; 236. Chamber B; 24. Piston A; 241. First protrusion; 25. Piston B; 26. Piston C; 261. Second protrusion; 2611. First air passage; 262. Third protrusion; 2621. Second air passage; 27. Elastic element; 28. Bushing; 30. Solenoid valve; 40. Bracket; 50. Spacing; 60. Heat insulation element; 61. Connecting sleeve; 62. Heat insulation rod. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] like Figure 1As shown, a high-life diaphragm valve includes a valve body 10, an actuator 20, and a solenoid valve 30, which constitute the basic structure of this utility model. The actuator 20 is fixedly connected to the upper end of the valve body 10. An air inlet 21 and an air inlet connector 22 installed at the air inlet 21 are provided at the upper end of the actuator 20. The solenoid valve 30 is connected to the air inlet connector 22 via a bracket 40, and a gap 50 is left between the solenoid valve 30 and the actuator 20. In this high-life diaphragm valve, the solenoid valve 30 and the actuator 20 are separated by the gap 50, which can minimize heat transfer to the solenoid valve 30, avoid high-temperature damage to the solenoid valve 30, and improve the service life of the solenoid valve 30.

[0022] In some embodiments, the actuator 20 includes a housing 23, pistons A24, B25, and C26 disposed within the housing 23. Specifically, pistons A24, B25, and C26 are slidably disposed within the housing 23 from top to bottom. A cylindrical portion 231 located within the housing 23 is provided at the upper end of the housing 23. An air intake channel communicating with an air inlet 21 is provided within the cylindrical portion 231. Piston A24 has a first protrusion 241 extending into the cylindrical portion 231. An elastic element 27 is disposed between the housing 23 and piston A24, the elastic element 27 being used to provide downward force for piston A24. The piston B25 is provided with a clearance channel. The upper end of the piston C26 is provided with a second protrusion 261 that passes through the clearance channel and abuts against the piston A24. The lower end of the piston C26 is provided with a third protrusion 262. The second protrusion 261 is provided with a first air passage 2611 that communicates with the air intake channel. The third protrusion 262 is provided with a second air passage 2621 that communicates with the air intake channel. A chamber A235 is provided between the first piston and the second piston. A chamber B236 is provided at the lower end of the third piston. The first air passage 2611 communicates with the chamber A235, and the second air passage 2621 communicates with the chamber B236.

[0023] The piston A24, the first protrusion 241, the second protrusion 261, and the third protrusion 262 are each provided with a bushing 28. The high-life diaphragm valve of this utility model has bearings provided on the outer periphery of the piston A24, the first protrusion 241, the second protrusion 261, and the third protrusion 262. The bushing 28 has new lubricity. By setting the bushing 28, the piston A24 and piston C26 can be prevented from being scratched and worn during the movement, the actuator 20 can be prevented from being poorly sealed, and the service life of the actuator 20 can be improved.

[0024] The housing 23 is provided with a limiting step 232 for limiting the lower end of the piston B25. The limiting step 232 is used to limit the downward movement of the piston B25. In this application, the piston B25 is in a fixed state, that is, it neither moves upward nor downward.

[0025] In some embodiments, the housing 23 is provided with a first exhaust channel 234 at the position between piston B25 and piston C26. A chamber A235 is formed between piston A24 and piston B25. The chamber A235 is isolated from the first exhaust channel 234 by piston B25. A chamber B236 is formed between the lower part of piston C26 and housing 23. The chamber B236 is isolated from the first exhaust channel 234 by piston C26. The first exhaust channel 234 is provided to facilitate the discharge of air between piston B25 and piston C26 when piston C26 moves upward, avoiding the phenomenon of "air suffocation". In other words, the first exhaust channel 234 facilitates the movement of piston C26.

[0026] In some embodiments, sealing rings are provided between the first protrusion 241 and the cylindrical portion 231, between the second protrusion 261 and the piston B25, between the third protrusion 262 and the housing 23, between the piston A24 and the housing 23, between the piston B25 and the housing 23, and between the piston C26 and the housing 23.

[0027] In some embodiments, the housing 23 is provided with a position sensor 233 extending into the housing 23, the position sensor 233 being used to detect the position of piston A24. During the opening and closing of the valve, piston A24 will move upward and downward accordingly, and the position sensor 233 will detect the movement of piston A24. The brightness or dimness of the indicator light on the position sensor 233 can be used to visually observe whether the valve is in the open or closed state.

[0028] In some embodiments, the bracket 40 has an L-shaped structure, including a horizontal part and a vertical part. The horizontal part is inserted into the air inlet connector 22, and the vertical part is used to install the solenoid valve 30. The horizontal part and the vertical part are separated from the actuator 20 by a space 50, which separates the solenoid valve 30 from the actuator 20.

[0029] In some embodiments, a heat insulation member 60 is provided between the valve body 10 and the actuator 20. The heat insulation member 60 includes a connecting sleeve 61 for connecting the valve body 10 and the actuator 20 and a heat insulation rod 62 slidably disposed in the connecting sleeve 61. The upper end of the heat insulation rod 62 abuts against the third protrusion 262, and the lower end of the heat insulation member 60 abuts against the top block 14 in the valve body 10.

[0030] In some embodiments, the connecting sleeve 61 and the heat insulation rod 62 are both made of materials with low thermal conductivity. This arrangement prevents the heat from being conducted to the actuator 20 after the high-temperature medium flows through the valve body 10, thereby avoiding damage to the actuator 20.

[0031] In some embodiments, the valve body 10 is provided with a valve body 11, a valve seat 12 disposed within the valve body 11, a diaphragm 13 for cooperating with the valve seat 12, and a top block 14 abutting against the upper end of the diaphragm 13. The top block 14 abuts against the heat insulation rod 62. The valve body 11 is provided with an inlet and an outlet. A valve port is provided inside the valve body 11. The valve seat 12 is disposed on the outer periphery of the valve port. A second exhaust channel 15 is provided on the upper end of the valve body 11 corresponding to the diaphragm 13.

[0032] In some embodiments, the upward stroke of piston A24 is L1, and the distance between the end face of piston C26 and the end face of piston B25 is L2, where L1≤L2. When piston A24 moves to the top, piston C26 still has a distance from piston B25, so it will not drive piston B25 to move upward.

[0033] The working principle of the diaphragm valve 13 in this application is as follows: Opening process: When the inlet 21 is opened, the CDA gas enters the chambers A235 and B236 through the inlet channel. The piston B25 remains stationary. The air pressure in the chamber A235 pushes the piston A24 upward, while the air pressure in the chamber B236 pushes the piston C26 upward. The combined force of pistons A24 and C26 pushes the elastic element 27 upward and compresses it. After the piston C26 moves upward, the force applied to the heat insulation rod 62 disappears. Under its own elasticity, the diaphragm 13 rebounds upward at its center position. After the diaphragm 13 returns to its natural state, the valve port between it and the valve seat 12 opens, and the medium flow channel is opened.

[0034] Closing process: The air inlet 21 is closed and depressurized. The elastic element 27 pushes the piston A24 downward. The piston A24 pushes the piston C26 downward. The piston C26 begins to apply force to the heat insulation rod 62. After the heat insulation rod 62 is subjected to force, it begins to apply force to the top block 14. After the top block 14 is subjected to force, it applies force to the diaphragm 13, so that the center position of the diaphragm 13 is deformed and comes into close contact with the valve seat 12. At this time, the valve port is closed and the medium passage is closed.

[0035] The solenoid valve 30 is used to control the intake and exhaust of air at the air inlet 21. By adjusting the frequency of the solenoid valve 30, the opening and closing cycle of the valve is controlled, thereby controlling the opening and closing cycle of the medium channel.

[0036] 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 long-life diaphragm valve, characterized in that: The device includes a valve body (10), an actuator (20), and a solenoid valve (30). The actuator (20) is fixedly connected to the upper end of the valve body (10). The upper end of the actuator (20) is provided with an air inlet (21) and an air inlet connector (22) installed at the air inlet (21). The solenoid valve (30) is connected to the air inlet connector (22) through a bracket (40), and there is a gap space (50) between the solenoid valve (30) and the actuator (20).

2. The high-life diaphragm valve according to claim 1, characterized in that: The actuator (20) includes a housing (23) and pistons A (24), B (25), and C (26) arranged from top to bottom within the housing (23). A cylindrical section (231) is provided at the upper end of the housing (23), and an air intake channel communicating with the air inlet (21) is provided inside the cylindrical section (231). The piston A (24) has a first protrusion (241) extending into the cylindrical section (231). An elastic element (27) is provided between the housing (23) and the piston A (24). A limiting step (232) is provided at the lower end of the housing (23) corresponding to the piston B (25). Piston B (25) is provided with a clearance channel. Piston C (26) has a second protrusion (261) at its upper end that passes through the clearance channel and abuts against piston A (24). Piston C (26) has a third protrusion (262) at its lower end. The second protrusion (261) has a first air passage (2611) that communicates with the air intake channel. The third protrusion (262) has a second air passage (2621) that communicates with the air intake channel. The outer periphery of piston A (24), first protrusion (241), second protrusion (261) and third protrusion (262) are respectively provided with bushings (28).

3. The long-life diaphragm valve according to claim 2, characterized in that: A sealing ring is provided between the first protrusion (241) and the cylindrical part (231), between the second protrusion (261) and the piston B (25), between the third protrusion (262) and the shell (23), between the piston A (24) and the shell (23), between the piston B (25) and the shell (23), and between the piston C (26) and the shell (23).

4. A high-lifespan diaphragm valve according to claim 2 or 3, characterized in that: The housing (23) is provided with a position sensor (233) extending into the housing (23), the position sensor (233) being used to detect the position of piston A (24).

5. A high-lifespan diaphragm valve according to claim 1, characterized in that: The bracket (40) has an L-shaped structure and includes a horizontal part and a vertical part. The horizontal part is inserted into the air inlet connector (22), and the vertical part is used to install the solenoid valve (30). The horizontal part and the vertical part are separated from the actuator (20) by a space (50).

6. A high-lifespan diaphragm valve according to claim 2, characterized in that: The housing (23) is provided with a first exhaust passage (234) at the position between piston B (25) and piston C (26). A chamber A (235) is formed between piston A (24) and piston B (25). The chamber A (235) is isolated from the first exhaust passage (234) by piston B (25). A chamber B (236) is formed between piston C (26) and housing (23). The chamber B (236) is isolated from the first exhaust passage (234) by piston C (26).

7. A high-lifespan diaphragm valve according to claim 2, characterized in that: A heat insulation component (60) is provided between the valve body (10) and the actuator (20). The heat insulation component (60) includes a connecting sleeve (61) for connecting the valve body (10) and the actuator (20) and a heat insulation rod (62) slidably disposed in the connecting sleeve (61). The upper end of the heat insulation rod (62) abuts against the third protrusion (262), and the lower end of the heat insulation component (62) abuts against the top block (14) inside the valve body (10).

8. A high-lifespan diaphragm valve according to claim 7, characterized in that: Both the connecting sleeve (61) and the heat insulation rod (62) are made of materials with low thermal conductivity.

9. A high-lifespan diaphragm valve according to claim 7, characterized in that: The valve body (10) is provided with a valve body (11), a valve seat (12) disposed in the valve body (11), a diaphragm (13) for cooperating with the valve seat (12), and a top block (14) abutting against the upper end of the diaphragm (13). The top block (14) abuts against the heat insulation rod (62). The valve body (11) is provided with an inlet and an outlet. The valve body (11) is provided with a second exhaust channel (15) corresponding to the upper end of the diaphragm (13).

10. A high-lifespan diaphragm valve according to claim 2 or 3, characterized in that: The upward stroke of piston A (24) is L1, and the distance between the end face of piston C (26) and the end face of piston B (25) is L2, where L1≤L2.

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