Pneumatic butterfly valve

Abstract

The application relates to a pneumatic butterfly valve, belonging to the field of pneumatic butterfly valves, which comprises a valve body assembly, a pneumatic actuator and a control mechanism; the control mechanism comprises a gas source treatment triad installed on the top of the pneumatic actuator, a limit switch box installed on the top of the pneumatic actuator and a pneumatic assembly connecting the gas source treatment triad and the valve body assembly; the top of the pneumatic actuator is provided with a mounting bracket, the mounting bracket is provided with a first mounting part arranged vertically and a second mounting part used for mounting the limit switch box, the first mounting part is slidably mounted with a mounting plate used for mounting the gas source treatment triad, and the top surface of the pneumatic actuator is provided with a supporting base, the supporting base is provided with a limiting groove used for arranging the bottom of the gas source treatment triad, and the limiting groove is provided with an elastic rubber layer. The application has the effect of improving the damping effect on the gas source treatment triad.

Description

Technical Field

[0001] This application relates to the field of pneumatic butterfly valves, and more particularly to a pneumatic butterfly valve. Background Technology

[0002] In the fields of industrial production and fluid control, valves are key components for controlling fluid flow, pressure, and flow rate. Their performance and reliability play a vital role in the operation of the entire system.

[0003] Chinese utility model patent CN218954055U discloses a pneumatic expansion butterfly valve, including a valve body and a control assembly. A valve seat is fitted inside the valve body, and a sealing groove is formed inside the valve seat, filled with a rubber air bladder. A gate flap is rotatably mounted in the center of the valve seat. The control assembly is located on the upper part of the valve body. The control assembly includes a pneumatic actuator, a YT positioner is located on the upper part of the pneumatic actuator, and an air source processing triplet is located to the right of the YT positioner. The air source processing triplet is mounted on a bracket via a mounting plate, but its bottom is unsupported, causing vibration during application and potentially leading to malfunction. Utility Model Content

[0004] In order to improve the vibration reduction effect of the air source treatment triple unit, this application provides a pneumatic butterfly valve.

[0005] The pneumatic butterfly valve provided in this application adopts the following technical solution: A pneumatic butterfly valve includes a valve body assembly, a pneumatic actuator connected to the valve body assembly, and a control mechanism installed on the pneumatic actuator. The control mechanism includes an air source processing triplet installed on the top of the pneumatic actuator, a limit switch box installed on the top of the pneumatic actuator, and a pneumatic assembly connecting the air source processing triplet and the valve body assembly. A mounting bracket is provided on the top of the pneumatic actuator. The mounting bracket has a vertically arranged first mounting part and a second mounting part for mounting the limit switch box. The first mounting part is slidably mounted with a mounting plate for mounting the air source processing triplet. A support base is provided on the top surface of the pneumatic actuator. The support base has a limiting groove for the bottom of the air source processing triplet, and an elastic rubber layer is provided in the limiting groove.

[0006] By adopting the above technical solution, the air source processing triplet and limit switch box are installed on the top of the pneumatic actuator, facilitating operation and management. The first and second mounting parts of the mounting bracket help to stably install the air source processing triplet and limit switch box on the top of the pneumatic actuator. Sliding the mounting plate to the first mounting part of the mounting bracket allows for flexible adjustment of the air source processing triplet's installation position, improving the fit between the air source processing triplet and the support base. Furthermore, the elastic rubber layer in the sliding groove of the support base provides limiting and buffering for the air source processing triplet, reducing the probability of vibration affecting the accuracy of the pneumatic butterfly valve during use.

[0007] Optionally, the first mounting portion has a sliding groove along its height direction, and the mounting plate has a limiting rod on the side facing the first mounting portion, with the limiting rod having a limiting part for preventing the limiting rod from disengaging from the sliding groove; the mounting plate and the first mounting portion are connected by a locking structure, the locking structure including a sliding tooth surface disposed on the side of the first mounting portion facing the mounting plate and an elastic retainer mounted on the mounting plate, the sliding tooth surface including sliding straight teeth arranged along the height direction of the first mounting portion, the sliding straight teeth having a first cut-off surface arranged perpendicular to the first mounting portion and a first guide surface arranged at an inclination, the elastic retainer having a limiting straight tooth that meshes with the sliding straight tooth, the limiting straight tooth restricting the sliding of the mounting plate in the first mounting portion after meshing with the sliding tooth surface.

[0008] By adopting the above technical solution, a specific structure for the cooperation between the mounting plate and the first mounting part is disclosed. First, by setting the limiting part, the limiting rod is restricted from disengaging from the sliding groove, so as to realize the sliding of the mounting plate along the height direction of the first mounting part. Then, by the cooperation between the limiting straight tooth and the sliding straight tooth, the position of the mounting plate on the first mounting part is locked. When it is necessary to adjust the position of the mounting plate, it is only necessary to drive the elastic clip to slide away from the first mounting part to unlock it, so as to realize the flexible adjustment of the position of the mounting plate on the first mounting part.

[0009] Optionally, the angle between the first guide surface and the end face of the first mounting part is 30°.

[0010] By adopting the above technical solution, the angle between the first guide surface and the end face of the first mounting part is set to 30°, which makes the engagement of the limiting straight teeth and the sliding straight teeth of the elastic clip smoother, facilitates the sliding and positioning of the mounting plate in the first mounting part, and improves the convenience and stability of the air source treatment triple unit installation.

[0011] Optionally, the mounting plate is provided with two elastic clips, which are arranged symmetrically on the left and right sides.

[0012] By adopting the above technical solution, the setting of two elastic clips on the mounting plate and the symmetrical arrangement of the two elastic clips on the left and right sides help to improve the stability of the locking between the mounting plate and the first mounting part.

[0013] Optionally, the first mounting portion has a sliding groove along its height direction, and the mounting plate has a sliding rod slidably arranged in the sliding groove on the side facing the first mounting portion, and the sliding rod has a locking portion extending out of the sliding groove, the locking portion being provided with a locking nut for fixing the mounting plate to the first mounting portion.

[0014] By adopting the above technical solution, the sliding plate can slide along the height direction of the first mounting part through the cooperation between the sliding groove and the sliding rod. The locking part of the sliding rod and the locking nut can lock the position of the mounting plate on the first mounting part, thereby making the height of the mounting plate adjustable. This facilitates the cooperation between the air source treatment triplet installed on the mounting plate and the support base, and improves the shock absorption effect of the air source treatment triplet.

[0015] Optionally, an elastic washer is provided between the locking nut and the first mounting part.

[0016] By adopting the above technical solution, the setting of the elastic washer between the locking nut and the first mounting part helps to further improve the shock absorption effect of the air source treatment triplet, and also reduces the probability of the locking nut loosening, ensuring the stability of the mounting plate locked on the first mounting part.

[0017] Optionally, the valve body assembly includes a butterfly valve body, a butterfly valve stem rotatably mounted on the butterfly valve body and connected to the output shaft of the pneumatic actuator, a butterfly valve plate connected to the butterfly valve stem, a butterfly valve seat mounted on the butterfly valve body, and a mounting flange connected to the outer edge of the butterfly valve body. The butterfly valve body has a sealing groove for arranging the butterfly valve seat, and the butterfly valve seat is interference-fitted with the sealing groove.

[0018] By adopting the above technical solution, the specific structure of the valve body assembly is disclosed. Through the coordinated design of the butterfly valve body, butterfly valve stem, butterfly valve plate, butterfly valve seat and mounting flange, especially by using an interference fit to press the butterfly valve seat into the sealing groove of the valve body, the retention strength and sealing reliability of the butterfly valve seat are greatly improved. This effectively prevents the valve seat from shifting or loosening under changes in fluid pressure or temperature, thereby ensuring that the pneumatic butterfly valve has excellent and stable sealing performance during long-term operation. At the same time, the overall structure is compact and easy to connect and install to the pipeline system through the mounting flange.

[0019] Optionally, the butterfly valve body and the mounting flange are integrally injection molded.

[0020] By adopting the above technical solution, the valve body and the mounting flange are integrally injection molded, which helps to improve the structural strength, sealing reliability and production efficiency of the pneumatic butterfly valve, and reduces the leakage risk that may exist in the split connection.

[0021] Optionally, the pneumatic assembly includes a solenoid valve installed on the pneumatic actuator and an air supply pipe connected to the output end of the air source processing triplet. The solenoid valve has a connector that is sealed to the air supply pipe.

[0022] By adopting the above technical solution, the specific structure of the pneumatic component is disclosed. The sealed connection between the solenoid valve and the gas pipeline helps to improve the sealing performance of the pneumatic butterfly valve, reduce the risk of air leakage, and also improve the response speed of the gas circuit.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. A pneumatic butterfly valve, wherein an air source processing triplet and a limit switch box are mounted on the top of a pneumatic actuator for convenient operation and management; the first and second mounting parts of the mounting bracket facilitate the stable installation of the air source processing triplet and the limit switch box on the top of the pneumatic actuator; the mounting plate is slidably mounted on the first mounting part of the mounting bracket, which facilitates flexible adjustment of the air source processing triplet in the installation position, thereby improving the fit between the air source processing triplet and the support base; and the elastic rubber layer in the sliding groove of the support base provides a limiting and buffering effect on the air source processing triplet, reducing the probability of vibration of the air source processing triplet during use affecting the accuracy of the pneumatic butterfly valve. 2. By cooperating with the limiting straight teeth and the sliding straight teeth, the position of the mounting plate on the first mounting part is locked. When it is necessary to adjust the position of the mounting plate, it is only necessary to drive the elastic clip to slide away from the first mounting part to unlock it, so as to achieve flexible adjustment of the position of the mounting plate on the first mounting part. 3. By cooperating with the sliding groove and sliding rod, and by setting the elastic washer between the locking nut and the first mounting part, the height of the mounting plate can be adjusted to facilitate the cooperation between the air source treatment triplet installed on the mounting plate and the support base, thereby improving the shock absorption effect of the air source treatment triplet. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a pneumatic butterfly valve in Embodiment 1 of this application.

[0025] Figure 2 This is a schematic diagram of the valve body assembly in Embodiment 1 of this application.

[0026] Figure 3This is a schematic diagram of the structure of the pneumatic actuator and control mechanism in Embodiment 1 of this application.

[0027] Figure 4 This is a cross-sectional schematic diagram of the air source treatment triple unit and the support base in Embodiment 1 of this application.

[0028] Figure 5 This is a cross-sectional schematic diagram of the fit between the mounting plate and the first mounting part in Embodiment 1 of this application.

[0029] Figure 6 This is a cross-sectional schematic diagram of the fit between the mounting plate and the first mounting part in Embodiment 2 of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Valve body assembly; 11. Butterfly valve body; 111. Sealing groove; 12. Butterfly valve stem; 13. Butterfly valve plate; 14. Butterfly valve seat; 15. Mounting flange; 2. Pneumatic actuator; 21. Mounting bracket; 211. First mounting part; 212. Second mounting part; 213. Sliding groove; 214. Sliding tooth surface; 2141. Sliding straight tooth; 21411. First stop surface; 21412. First guide surface; 22. Support 221. Support base; 222. Limiting groove; 223. Elastic rubber layer; 23. Mounting plate; 231. Limiting rod; 2311. Limiting part; 232. Elastic clip; 2321. Limiting straight tooth; 233. Sliding rod; 2331. Locking part; 2332. Locking nut; 2333. Elastic washer; 3. Control mechanism; 31. Air source treatment triplet; 32. Limit switch box; 33. Pneumatic assembly; 331. Solenoid valve; 332. Air supply pipeline. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0032] This application discloses a pneumatic butterfly valve.

[0033] Example 1 Reference Figure 1 and Figure 2 A pneumatic butterfly valve includes a valve body assembly 1, a pneumatic actuator 2 connected to the top of the valve body assembly 1, and a control mechanism 3 mounted on the pneumatic actuator 2. The valve stem assembly includes a butterfly valve body 11, a butterfly valve stem 12 rotatably mounted on the butterfly valve body 11 and connected to the output shaft of the pneumatic actuator 2, a butterfly valve plate 13 connected to the butterfly valve stem 12, a butterfly valve seat 14 mounted on the butterfly valve body 11, and a mounting flange 15 connected to the outer edge of the butterfly valve body 11. The butterfly valve body 11 has a sealing groove 111 for accommodating the butterfly valve seat 14, and the butterfly valve seat 14 is interference-fitted with the sealing groove 111. To improve the structural strength of the pneumatic butterfly valve, the butterfly valve seat 14 and the mounting flange 15 are integrally injection molded.

[0034] Reference Figure 1 The control mechanism 3 includes an air source processing triplet 31 mounted on top of the pneumatic actuator 2, a limit switch box 32 mounted on top of the pneumatic actuator 2, and a pneumatic assembly 33 connecting the air source processing triplet 31 and the valve body assembly 1. The pneumatic assembly 33 includes a solenoid valve 331 mounted on the pneumatic actuator 2 and an air supply pipe 332 connected to the output end of the air source processing triplet 31. The solenoid valve 331 has a connector that is sealed to the air supply pipe 332.

[0035] Reference Figure 3 and Figure 4 To facilitate the stable installation of the air source treatment triplet 31 and the limit switch box 32, a mounting bracket 21 is provided on the top surface of the pneumatic actuator 2. The mounting bracket 21 is installed on the top surface of the pneumatic actuator 2 with screws. The mounting bracket 21 includes a first mounting part 211 arranged vertically on the top surface of the pneumatic actuator 2 and a second mounting part 212 for mounting the limit switch box 32. To reduce the probability of vibration of the air source treatment triplet 31 affecting the function of the pneumatic butterfly valve during application, a support base 22 is provided on the top surface of the pneumatic actuator 2. The support base 22 has a limiting groove 221 for arranging the air source treatment triplet 31, and an elastic rubber layer 222 is provided in the limiting groove 221 of the support base 22.

[0036] See Figure 5 To facilitate the connection between the gas processing triplet 31 and the support base 22, a mounting plate 23 for mounting the gas processing triplet 31 is slidably mounted on the mounting bracket 21 at the first mounting portion 211. The mounting bracket 21 has a sliding groove 213 at the first mounting portion 211, which is arranged along the height direction of the first mounting portion 211. The mounting plate 23 has a limiting rod 231 extending toward the first mounting portion 211 of the mounting bracket 21, and the side of the limiting rod 231 away from the mounting plate 23 has a limiting portion 2311 for preventing the limiting rod 231 from dislodging from the sliding groove 213.

[0037] Reference Figure 1 and Figure 5To lock the mounting plate 23 onto the first mounting portion 211 of the mounting bracket 21, a locking structure connects the mounting plate 23 and the first mounting portion 211. The locking structure includes a sliding toothed surface 214 disposed on the side of the first mounting portion 211 facing the mounting plate 23 and an elastic retainer 232 mounted on the mounting plate 23. The sliding toothed surface 214 includes sliding straight teeth 2141 arranged in the height direction of the first mounting portion 211. Each sliding straight tooth 2141 has a first stop surface 21411 arranged perpendicular to the first mounting portion 211 and a first guide surface 21412 arranged inclined to the first mounting portion 211. The angle between the first guide surface 21412 and the end face of the first mounting portion 211 is 30°. The elastic locking member 232 has a limiting straight tooth 2321 that meshes with the sliding straight tooth 2141. When the limiting straight tooth 2321 meshes with the sliding tooth surface 214, it can restrict the sliding of the mounting plate 23 on the first mounting part 211. In order to improve the stability of the locking between the mounting plate 23 and the first mounting part 211, two elastic locking members 232 are provided at the bottom of the mounting plate 23, and the two elastic locking members 232 are arranged symmetrically on the left and right.

[0038] Combination Figures 1 to 5 The implementation principle of a pneumatic butterfly valve in this application embodiment is as follows: the air source processing triplet 31 and the limit switch box 32 are installed on the top of the pneumatic actuator 2 for convenient operation and management; the first mounting part 211 and the second mounting part 212 of the mounting bracket 21 help to stably install the air source processing triplet 31 and the limit switch box 32 on the top of the pneumatic actuator 2; the mounting plate 23 is slidably installed at the first mounting part 211 of the mounting bracket 21; the cooperation between the sliding tooth surface 214 and the elastic clip 232 helps to flexibly adjust the installation position of the air source processing triplet 31 to improve the cooperation between the air source processing triplet 31 and the support base 22; and the elastic rubber layer 222 in the sliding groove 213 of the support base 22 plays a limiting and buffering role for the air source processing triplet 31, reducing the probability of vibration of the air source processing triplet 31 during use affecting the accuracy of the pneumatic butterfly valve.

[0039] Example 2 In this embodiment, the pneumatic butterfly valve is identical to the pneumatic butterfly valve in Embodiment 1, except for the locking structure of the first mounting part of the mounting plate and mounting bracket, which differs from that in Embodiment 1.

[0040] Reference Figure 6The mounting bracket 21 has a sliding groove 213 along its height direction in the first mounting portion 211. The mounting plate 23 has a sliding rod 233 slidably arranged within the sliding groove 213 on the side facing the first mounting portion 211. The sliding rod 233 has a locking portion 2331 extending outside the sliding groove 213. A locking nut 2332 for fixing the mounting plate 23 to the first mounting portion 211 is provided at the locking portion 2331 on the sliding rod 233. To further improve the vibration damping effect on the air source treatment triplet 31, an elastic washer 2333 is provided between the locking nut 2332 and the first mounting portion 211.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pneumatic butterfly valve, characterized in that, The device includes a valve body assembly (1), a pneumatic actuator (2) connected to the valve body assembly (1), and a control mechanism (3) installed on the pneumatic actuator (2). The control mechanism (3) includes an air source processing triplet (31) installed on the top of the pneumatic actuator (2), a limit switch box (32) installed on the top of the pneumatic actuator (2), and a pneumatic assembly (33) connecting the air source processing triplet (31) and the valve body assembly (1). A mounting bracket (21) is provided on the top of the pneumatic actuator (2). (21) It has a first mounting part (211) arranged vertically and a second mounting part (212) for mounting the limit switch box (32). The first mounting part (211) is slidably mounted with a mounting plate (23) for mounting the air source processing triplet (31). The top surface of the pneumatic actuator (2) is provided with a support base (22). The support base (22) has a limiting groove (221) for the bottom arrangement of the air source processing triplet (31) and an elastic rubber layer (222) is provided in the limiting groove (221).

2. A pneumatic butterfly valve according to claim 1, characterized in that, The first mounting part (211) has a sliding groove (213) along its height direction. The mounting plate (23) has a limiting rod (231) on the side facing the first mounting part (211), and the limiting rod (231) has a limiting part (2311) for limiting the limiting rod (231) from dislodging from the sliding groove (213). The mounting plate (23) and the first mounting part (211) are connected by a locking structure. The locking structure includes a sliding tooth surface (214) disposed on the side of the first mounting part (211) facing the mounting plate (23) and a locking part mounted on the first mounting part (211). The elastic retainer (232) of the mounting plate (23) includes a sliding tooth surface (214) comprising a sliding straight tooth (2141) arranged along the height direction of the first mounting portion (211). The sliding straight tooth (2141) has a first stop surface (21411) arranged perpendicular to the first mounting portion (211) and a first guide surface (21412) arranged at an inclination. The elastic retainer (232) has a limiting straight tooth (2321) that meshes with the sliding straight tooth (2141). After the limiting straight tooth (2321) meshes with the sliding tooth surface (214), it restricts the sliding of the mounting plate (23) in the first mounting portion (211).

3. A pneumatic butterfly valve according to claim 2, characterized in that, The angle between the first guide surface (21412) and the end face of the first mounting part (211) is 30°.

4. A pneumatic butterfly valve according to claim 2, characterized in that, The mounting plate (23) is provided with two elastic clips (232), which are arranged symmetrically on the left and right.

5. A pneumatic butterfly valve according to claim 1, characterized in that, The first mounting part (211) has a sliding groove (213) along the height direction of the first mounting part (211). The mounting plate (23) has a sliding rod (233) slidably arranged in the sliding groove (213) on the side facing the first mounting part (211). The sliding rod (233) has a locking part (2331) extending out of the sliding groove (213). The locking part (2331) is provided with a locking nut (2332) for fixing the mounting plate (23) to the first mounting part (211).

6. A pneumatic butterfly valve according to claim 5, characterized in that, An elastic washer (2333) is provided between the locking nut (2332) and the first mounting part (211).

7. A pneumatic butterfly valve according to claim 1, characterized in that, The valve body assembly (1) includes a butterfly valve body (11), a butterfly valve stem (12) rotatably mounted on the butterfly valve body (11) and connected to the output shaft of the pneumatic actuator (2), a butterfly valve plate (13) connected to the butterfly valve stem (12), a butterfly valve seat (14) mounted on the butterfly valve body (11), and a mounting flange (15) connected to the outer edge of the butterfly valve body (11). The butterfly valve body (11) has a sealing groove (111) for arranging the butterfly valve seat (14), and the butterfly valve seat (14) is interference-fitted with the sealing groove (111).

8. A pneumatic butterfly valve according to claim 7, characterized in that, The butterfly valve body (11) and the mounting flange (15) are integrally injection molded.

9. A pneumatic butterfly valve according to claim 1, characterized in that, The pneumatic assembly (33) includes a solenoid valve (331) installed on the pneumatic actuator (2) and an air supply pipe (332) connected to the output end of the air source processing triplet (31). The solenoid valve (331) has a connector that is sealed to the air supply pipe (332).

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