Main shaft torsion spring fixing structure of valve driver

Abstract

The utility model relates to the field of valve driving devices, and discloses a main shaft torsion spring fixing structure of a valve driver, the main shaft torsion spring fixing structure comprises a bottom plate, a main shaft and a torsion spring, a limiting ring is annularly arranged on the main shaft, the bottom plate rotationally sleeves the main shaft and abuts against the limiting ring, and a fixing plate sleeves the end, away from the bottom plate, of the main shaft; a positioning piece is arranged between the main shaft and the fixing plate, the torsional spring is located between the bottom plate and the fixing plate and arranged on the main shaft in a sleeving mode, a fixing hole is formed in the bottom plate, a positioning hole is formed in the outer side wall of the fixing plate, one end of the torsional spring is inserted into the fixing hole, and the other end of the torsional spring is inserted into the positioning hole. The valve driver has the effect of improving the safety performance of the valve driver.

Description

Technical Field

[0001] This application relates to the field of valve actuators, and in particular to a spindle torsion spring fixing structure for a valve actuator. Background Technology

[0002] In fire protection equipment, explosion-proof smoke and fire dampers are safety control devices specifically designed for ventilation and air conditioning systems in explosive gas environments. These valves combine smoke and fire protection functions, rapidly closing in the event of a fire to prevent the spread of smoke and fire, while also possessing explosion-proof characteristics to ensure safe operation in explosive environments. With continuously improving industrial safety standards, these valves are increasingly widely used in various high-risk locations, placing higher demands on their reliability and safety.

[0003] The actuator for explosion-proof smoke and fire-resistant regulating valves relies primarily on the interaction between the spindle used for venting smoke and a torsion spring to respond quickly to a fire and initiate a shut-off operation. In the existing installation process of actuators for explosion-proof smoke and fire-resistant regulating valves, the spindle torsion spring is typically fixed by drilling a hole in the spindle. Specifically, a hole is drilled in the spindle, and the end of the torsion spring is directly inserted into this hole to achieve a fixed connection between the spindle and the torsion spring.

[0004] However, the aforementioned drilling method of fixing has many drawbacks. On the one hand, drilling significantly reduces the wall strength of the spindle, making it more susceptible to damage when subjected to large torques or pressures, thus affecting the service life and reliability of the entire drive. On the other hand, since flue gas usually flows inside the spindle, the drilled area is highly likely to become a weak point for flue gas leakage. This not only reduces the sealing performance of the valve but may also pose safety hazards in explosion-proof environments, failing to meet the increasingly stringent industrial safety and equipment performance requirements. Utility Model Content

[0005] To improve the safety performance of valve actuators, this application provides a valve actuator spindle torsion spring fixing structure.

[0006] The valve actuator spindle torsion spring fixing structure provided in this application adopts the following technical solution:

[0007] A valve actuator spindle torsion spring fixing structure includes a base plate, a spindle, and a torsion spring. A limiting platform is provided around the spindle. The base plate is rotatably sleeved on the spindle and abuts against the limiting platform. A fixing plate is sleeved on the end of the spindle away from the base plate, and a positioning element is provided between the spindle and the fixing plate. The torsion spring is located between the base plate and the fixing plate and is sleeved on the spindle. A fixing hole is provided on the base plate, and a positioning hole is provided on the outer side wall of the fixing plate. One end of the torsion spring is inserted into the fixing hole, and the other end is inserted into the positioning hole.

[0008] By adopting the above technical solution, the torsion spring is firmly fixed under the action of the fixing plate, ensuring the stability and reliability of the torsion spring during operation. This avoids the impact of traditional drilling methods on the spindle strength and improves the mechanical performance and service life of the spindle. At the same time, this fixing structure can effectively prevent flue gas leakage, enhance the sealing performance of valves, improve the explosion-proof rating, and ensure safe operation in explosive environments.

[0009] Optionally, the spindle includes a support portion passing through a torsion spring and a connecting portion passing through a fixing plate. The connecting portion is coaxially arranged with the support portion, and the diameter of the connecting portion is smaller than that of the support portion. A polygonal limiting ring is provided around the end of the connecting portion near the support portion. The inner hole of the fixing plate is fitted with the limiting ring. When the fixing plate is slidably sleeved on the connecting portion until it abuts against the end wall of the support portion, the fixing plate and the limiting ring are inserted into each other.

[0010] By adopting the above technical solution, the polygonal limiting ring engages with the inner hole of the fixing plate, enabling the fixing plate to be accurately positioned on the connecting part of the spindle. This prevents radial movement of the fixing plate on the spindle and enhances the connection stability between the fixing plate and the spindle. Simultaneously, the insertion fit between the limiting ring and the fixing plate effectively prevents the torsion spring from loosening during operation, improving the reliability and safety of the entire spindle torsion spring fixing structure.

[0011] Optionally, the positioning component includes a positioning key pin disposed on the side wall of the inner hole of the fixing plate, and a positioning key groove is provided on the side wall of the limiting ring, and the positioning key pin and the positioning key groove are inserted into each other.

[0012] By adopting the above technical solution, the insertion and engagement between the positioning key and the positioning keyway can ensure the accurate positioning of the fixing plate on the spindle, avoid the torsion spring from coming out or shifting position due to the loosening of the fixing plate, improve the connection stability between the spindle and the torsion spring, and enhance the reliability of the overall structure.

[0013] Optionally, the positioning element further includes an outer retaining ring that fits onto the connecting portion, the outer retaining ring pressing the fixing plate against the end wall of the support portion.

[0014] By adopting the above technical solution, the external retaining ring can effectively press the fixing plate against the end wall of the support, thereby ensuring a tight fit between the fixing plate and the spindle and enhancing the stability of the structure. This method avoids the displacement of the torsion spring position caused by the loosening of the fixing plate, improving the overall reliability of the torsion spring fixation. In addition, the design of the external retaining ring simplifies the assembly process, allowing for fixation without complicated tools, thus improving assembly efficiency.

[0015] Optionally, a sealing groove is provided on the end of the connecting part away from the support part, and a sealing ring is sleeved inside the sealing groove.

[0016] By adopting the above technical solution, the sealing ring fitted on the connection part is used to enhance the stability of the connection with other components in the actuator, thereby improving the overall sealing and reliability of the valve actuator, especially in explosion-proof environments, which helps to enhance the safety performance of the equipment.

[0017] Optionally, the positioning component further includes a fixing ring slidably sleeved on the connecting part. The connecting part has a thread on the end near the limiting ring. The fixing ring is rotatably sleeved on the end of the connecting part near the limiting ring through the thread. The fixing ring presses the fixing plate against the end wall of the support part.

[0018] By adopting the above technical solution, the fixing ring is screwed onto the end of the connecting part near the limiting ring, pressing the fixing plate against the end wall of the support part, which enhances the connection stability between the fixing plate and the main shaft, effectively prevents the fixing plate from loosening due to vibration or impact during use, and improves the reliability and safety of the overall structure.

[0019] Optionally, the fixing ring has an arc groove for the end of the torsion spring to pass through, and the end of the torsion spring extending out of the fixing plate is limited in the arc groove and slides with the arc groove along the groove shape.

[0020] By adopting the above technical solution, the arc groove on the fixing ring for the torsion spring end to pass through can effectively limit the position of the torsion spring end and prevent it from falling off the fixing plate during operation, thereby improving the stability and reliability of the entire fixing structure. At the same time, the sliding fit design between the arc groove and the torsion spring end can reduce the frictional resistance between the fixing ring and the torsion spring during installation, thereby extending the service life of the torsion spring.

[0021] Optionally, the outer ring sidewall of the fixing ring is provided with anti-slip protrusions.

[0022] By adopting the above technical solution, the outer ring sidewall of the fixing ring is provided with anti-slip protrusions, which can effectively increase the friction between the hand and the fixing ring, making it easier for the operator to screw the fixing ring, ensuring that the fixing ring can firmly press the fixing plate against the end wall of the support, thus improving assembly efficiency and stability.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The fixed plate securely fixes the torsion spring, ensuring its stability and reliability during operation. This avoids the impact of traditional drilling methods on the spindle strength, improving the spindle's mechanical properties and service life. Simultaneously, this fixing structure effectively prevents gas leakage, enhances valve sealing performance, improves explosion-proof rating, and ensures safe operation in explosive environments.

[0025] 2. The polygonal locating ring engages with the inner hole of the fixing plate, allowing the fixing plate to be accurately positioned on the spindle connection, preventing radial movement of the fixing plate on the spindle and enhancing the connection stability between the fixing plate and the spindle. Simultaneously, the insertion fit between the locating ring and the fixing plate effectively prevents the torsion spring from loosening during operation, improving the reliability and safety of the entire spindle torsion spring fixing structure.

[0026] 3. The interlocking fit between the positioning key and the positioning keyway ensures the precise positioning of the fixing plate on the spindle, preventing the torsion spring from coming out or shifting position due to loosening of the fixing plate, thus improving the connection stability between the spindle and the torsion spring and enhancing the reliability of the overall structure. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0028] Figure 2 This is a cross-sectional view of the overall structure of Embodiment 1 of this application.

[0029] Figure 3 This is a schematic diagram of the overall structure of Embodiment 2 of this application.

[0030] Figure 4 This is a cross-sectional view illustrating the connection relationship between the fixed ring and the main shaft in Embodiment 2 of this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Base plate; 11. Fixing hole; 2. Spindle; 21. Support part; 211. Limiting platform; 22. Connecting part; 221. Sealing groove; 3. Torsion spring; 4. Fixing plate; 41. Positioning hole; 5. Positioning component; 51. Positioning key pin; 52. Outer retaining ring; 53. Fixing ring; 531. Arc groove; 6. Limiting ring; 61. Positioning keyway; 7. Sealing ring; 8. Anti-slip ridge. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0034] This application discloses a main shaft torsion spring fixing structure for a valve actuator.

[0035] Example 1

[0036] Reference Figure 1 and Figure 2A valve actuator spindle torsion spring fixing structure includes a base plate 1, a main shaft 2, and a torsion spring 3. The base plate 1 is rotatably sleeved on the main shaft 2, and a fixing hole 11 is provided on the base plate 1. A fixing plate 4 is sleeved on the end of the main shaft 2 away from the base plate 1, and a positioning element 5 is provided between the main shaft 2 and the fixing plate 4. A positioning hole 41 is provided on the outer wall of the fixing plate 4. The torsion spring 3 is sleeved on the main shaft 2 and located between the base plate 1 and the fixing plate 4. One end of the torsion spring 3 is inserted into the fixing hole 11, and the other end is inserted into the positioning hole 41.

[0037] Reference Figure 1 and Figure 2 The main shaft 2 includes a coaxially integrally formed support part 21 and a connecting part 22. The diameter of the connecting part 22 is smaller than that of the support part 21. An integrally formed limiting platform 211 is provided on the support part 21, and the base plate 1 abuts against the limiting platform 211. A torsion spring 3 is sleeved on the support part 21. A fixing plate 4 is sleeved on the connecting part 22, and a polygonal limiting ring 6 is provided around the end of the connecting part 22 near the support part 21. In this embodiment, a hexagonal one is used as an example. The hexagonal limiting ring 6 is integrally formed on the end of the connecting part 22 near the support part 21. The inner hole shape of the fixing plate 4 is matched with the limiting ring 6. The fixing plate 4 and the limiting ring 6 are inserted and fitted together. When the fixing plate 4 is slidably sleeved on the connecting part 22, it abuts against the end wall of the support part 21.

[0038] Reference Figure 2 In this embodiment, the positioning component 5 includes a positioning key pin 51 and an outer retaining ring 52. The positioning key pin 51 is integrally formed on the inner sidewall of the fixing plate 4, and a positioning keyway 61 is provided on the sidewall of the limiting ring 6. The positioning key pin 51 and the positioning keyway 61 are inserted into each other along the axial direction of the main shaft 2. The outer retaining ring 52 is made of stainless steel and presses the fixing plate 4 against the end wall of the support part 21.

[0039] Reference Figure 1 In order to improve the stability of the connection between the spindle 2 and other devices in the driver, a sealing groove 221 is provided on the end of the connecting part 22 away from the support part 21, and a rubber sealing ring 7 is sleeved inside the sealing groove 221.

[0040] The implementation principle of the main shaft torsion spring fixing structure of the valve actuator in this embodiment is as follows: the radial limiting of the hexagonal limiting ring 6, the positioning of the positioning key pin 51 and the positioning keyway 61 through insertion and engagement, and the fixing of the outer retaining ring 52 are used to quickly assemble the fixing plate 4 on the main shaft 2. Furthermore, by opening a fixing hole 11 on the fixing plate 4, the end of the torsion spring 3 is locked in the fixing hole 11, thereby achieving a stable fixation of the torsion spring 3. This eliminates the risk of flue gas leakage in the traditional drilling fixing method, significantly improves the mechanical strength of the main shaft 2, enhances the stability of the main shaft 2 when subjected to large torque or pressure, thereby improving the sealing performance of the valve and ultimately enhancing the safety of operation in explosion-proof environments.

[0041] Example 2

[0042] Reference Figure 3 and Figure 4 The difference between this embodiment and embodiment 1 is that the composition of the positioning component 5 is different. The positioning component 5 in this embodiment includes a positioning key pin 51 and a fixing ring 53. The positioning key pin 51 has the same structure as in embodiment 1. The fixing ring 53 is slidably sleeved on the connecting part 22, and its outer ring sidewall is provided with an integrally formed anti-slip protrusion 8.

[0043] Reference Figure 3 and Figure 4 The connecting part 22 has a thread on the end near the limiting ring 6. The fixing ring 53 is rotated and sleeved on the end of the connecting part 22 near the limiting ring 6 through the thread. The fixing ring 53 presses the fixing plate 4 against the end wall of the support part 21.

[0044] Reference Figure 3 In order to further limit the end of the torsion spring 3 extending out of the fixing plate 4, an arc groove 531 is provided on the fixing ring 53. The arc center of the arc groove 531 coincides with the axis of the connecting part 22. The end of the torsion spring 3 passes through the arc groove 531, and the end of the torsion spring 3 extending out of the fixing plate 4 slides in a groove-shaped fit with the arc groove 531.

[0045] The implementation principle of Example 2 is as follows: When assembling the fixing ring 53, the operator screws the fixing ring 53, and uses the rotational engagement of the thread to press the fixing plate 4 against the end wall of the support part 21, thereby enhancing the connection stability between the fixing plate 4 and the main shaft 2, effectively preventing the fixing plate 4 from loosening due to vibration or impact during use. In addition, the arc groove 531 opened on the fixing ring 53 for the end of the torsion spring 3 to pass through can effectively limit the position of the end of the torsion spring 3, preventing it from falling off the fixing plate 4 during operation, thereby further improving the stability and reliability of the entire fixing structure.

[0046] 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 valve actuator spindle torsion spring fixing structure, characterized in that... The device includes a base plate (1), a main shaft (2), and a torsion spring (3). A limiting platform (211) is provided around the main shaft (2). The base plate (1) is rotatably sleeved on the main shaft (2) and abuts against the limiting platform (211). A fixing plate (4) is sleeved on the end of the main shaft (2) away from the base plate (1), and a positioning element (5) is provided between the main shaft (2) and the fixing plate (4). The torsion spring (3) is located between the base plate (1) and the fixing plate (4) and is sleeved on the main shaft (2). A fixing hole (11) is provided on the base plate (1), and a positioning hole (41) is provided on the outer side wall of the fixing plate (4). One end of the torsion spring (3) is inserted into the fixing hole (11), and the other end is inserted into the positioning hole (41).

2. The main shaft torsion spring fixing structure of a valve actuator according to claim 1, characterized in that... The main shaft (2) includes a support part (21) passing through the torsion spring (3) and a connecting part (22) passing through the fixing plate (4). The connecting part (22) is coaxially arranged with the support part (21), and the diameter of the connecting part (22) is smaller than that of the support part (21). A polygonal limiting ring (6) is provided around the end of the connecting part (22) near the support part (21). The inner hole of the fixing plate (4) is fitted with the limiting ring (6). When the fixing plate (4) slides on the connecting part (22) until it abuts against the end wall of the support part (21), the fixing plate (4) and the limiting ring (6) are inserted into each other.

3. The main shaft torsion spring fixing structure of a valve actuator according to claim 2, characterized in that... The positioning component (5) includes a positioning key pin (51) disposed on the side wall of the inner hole of the fixing plate (4), and a positioning key groove (61) is provided on the side wall of the limiting ring (6). The positioning key pin (51) and the positioning key groove (61) are inserted into each other.

4. The main shaft torsion spring fixing structure of a valve actuator according to claim 2, characterized in that... The positioning component (5) also includes an outer retaining ring (52) that is fitted onto the connecting part (22), and the outer retaining ring (52) presses the fixing plate (4) against the end wall of the support part (21).

5. The main shaft torsion spring fixing structure of a valve actuator according to claim 2, characterized in that... A sealing groove (221) is provided on the end of the connecting part (22) away from the support part (21), and a sealing ring (7) is provided inside the sealing groove (221).

6. The main shaft torsion spring fixing structure of a valve actuator according to claim 3, characterized in that... The positioning component (5) further includes a fixing ring (53) that is slidably sleeved on the connecting part (22). The connecting part (22) has a thread on the end near the limiting ring (6). The fixing ring (53) is rotatably sleeved on the end of the connecting part (22) near the limiting ring (6) by the thread. The fixing ring (53) presses the fixing plate (4) against the end wall of the support part (21).

7. The main shaft torsion spring fixing structure of a valve actuator according to claim 6, characterized in that... The fixing ring (53) has an arc groove (531) for the end of the torsion spring (3) to pass through. The end of the torsion spring (3) extending out of the fixing plate (4) is limited in the arc groove (531) and slides with the arc groove (531) along the groove shape.

8. The main shaft torsion spring fixing structure of a valve actuator according to claim 6, characterized in that... The outer ring sidewall of the fixing ring (53) is provided with anti-slip protrusions (8).

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