Valve actuator handwheel mechanism

Abstract

The utility model relates to valve technical field and disclose a valve actuator hand wheel mechanism, including valve body, the top rotation of valve body is connected with main shaft, and the bottom end of main shaft extends to the inside of valve body and is fixedly installed with the valve core, the top fixed mounting of valve body is used for driving the rotation of pneumatic motor of main shaft, and the top end of main shaft extends to the top of pneumatic motor and is provided with hand wheel switching mechanism. The valve actuator hand wheel mechanism, when needing manual operation, the hand wheel position is positioned through the auxiliary positioning assembly, the hand wheel cover is removed, makes inner tooth and outer tooth disc clamping, and the main shaft and valve core can be rotated with hand wheel ring, realize the manual regulation operation of valve, and when using pneumatic motor to drive the rotation of main shaft, the hand wheel cover and hand wheel ring are removed downwards, make inner tooth and outer tooth disc separate, the hand wheel ring keeps stationary at this moment, does not rotate with main shaft, ensures the safety in the use of valve.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically to a valve actuator handwheel mechanism. Background Technology

[0002] As an indispensable and important component of automatic control systems, the stability requirements for valve actuators are self-evident. The handwheel mechanism located on the valve actuator is generally used for manual operation when the gas supply is cut off.

[0003] However, the handwheel is usually fixedly installed between the valve core and the main shaft. For pneumatic valves, when the valve core and main shaft are driven to rotate by a pneumatic motor, the handwheel also rotates. In this case, it is easy to cause injury to external personnel.

[0004] In view of this, the present invention proposes a valve actuator handwheel mechanism to solve this problem. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a valve actuator handwheel mechanism to solve the problems existing in the background art.

[0006] This utility model provides the following technical solution: a valve actuator handwheel mechanism, including a valve body, a main shaft rotatably connected to the top of the valve body, the bottom end of the main shaft extending into the valve body and fixedly installed with a valve core, a pneumatic motor for driving the main shaft to rotate fixedly installed on the top of the valve body, and a handwheel switching mechanism provided at the top end of the main shaft extending to the top of the pneumatic motor.

[0007] The handwheel switching mechanism includes a positioning ring seat fixedly installed on the top of the pneumatic motor. The positioning ring seat covers the outside of the main shaft. A limit seat is fixedly installed on the top of the main shaft. An external gear plate is fixedly installed on the lower end of the limit seat. A handwheel sleeve is fitted on the surface of the main shaft. A handwheel ring is fixedly installed on the outer wall of the handwheel sleeve. A stepped groove is opened at the upper end of the inner wall of the handwheel sleeve. Internal teeth are arranged in a circumferential array inside the stepped groove. When the handwheel sleeve moves upward, the internal teeth mesh with the external gear plate.

[0008] Furthermore, the top of the positioning ring seat is fixedly installed with three anti-rotation pillars in a circular array, and the outer wall of the handwheel sleeve is provided with several anti-rotation grooves in a circular array, with the anti-rotation pillars and anti-rotation grooves corresponding to each other.

[0009] As a further description of the above technical solution: by setting an anti-rotation post and an anti-rotation groove, when the handwheel sleeve is kept disengaged from the external gear plate, the anti-rotation post can be inserted into the anti-rotation groove to firmly position the handwheel sleeve and prevent the handwheel sleeve from rotating due to friction between it and the main shaft.

[0010] Furthermore, a contact switch is embedded at the top of the anti-rotation column. The contact switch is connected to the pneumatic motor signal. When the anti-rotation column is engaged with the anti-rotation groove, the contact switch is in the connected state.

[0011] As a further description of the above technical solution: by setting a contact switch, when the anti-rotation column is engaged with the anti-rotation groove, the contact switch is triggered by the handwheel sleeve, so that the pneumatic motor can be started, thus avoiding the situation where the pneumatic motor drives the main shaft and handwheel to rotate when the handwheel is in use, and further ensuring safety in use.

[0012] Furthermore, the handwheel sleeve is provided with an auxiliary positioning component corresponding to the main shaft. The auxiliary positioning component includes a mounting groove formed in the inner wall of the handwheel sleeve. A ball is movably installed inside the mounting groove, and a support spring is provided on the inner wall of the mounting groove to drive the ball to move closer to the main shaft. An annular groove is formed on the surface of the main shaft. The position of the ball corresponds to the position of the annular groove. There are two annular grooves, and the two annular grooves have different heights.

[0013] As a further description of the above technical solution: When switching and adjusting the position of the overall handwheel, the auxiliary positioning component uses the support spring to drive the ball to engage with the annular groove, which can assist in positioning the handwheel. When the ball is engaged in the annular groove on the upper side, the internal teeth mesh with the external gear plate, and the handwheel is in use. When the ball is engaged in the annular groove on the lower side, the internal teeth disengage from the external gear plate, and the anti-rotation post engages with the anti-rotation groove, and the handwheel is in a locked state.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] 1. Compared with the prior art, when the valve actuator handwheel mechanism is in use and manual operation is required, the handwheel sleeve can be moved upward to lock the internal teeth with the external gear plate. The main shaft and valve core can then be rotated using the handwheel ring to achieve manual adjustment of the valve. When the main shaft is driven by a pneumatic motor, the handwheel sleeve and handwheel ring can be moved downward to disengage the internal teeth from the external gear plate. At this time, the handwheel ring remains stationary and does not rotate with the main shaft, ensuring safety during valve use.

[0016] 2. Compared with the prior art, the handwheel mechanism of this valve actuator, by setting an anti-rotation pin and an anti-rotation groove, can firmly position the handwheel sleeve by having the anti-rotation pin engage with the anti-rotation groove when the handwheel sleeve is disengaged from the external gear plate, thus preventing the handwheel sleeve from rotating due to friction between it and the main shaft. By setting a contact switch, when the anti-rotation pin and the anti-rotation groove are engaged, the handwheel sleeve triggers the contact switch, enabling the pneumatic motor to start. This prevents the pneumatic motor from driving the main shaft and handwheel to rotate when the handwheel is in use, further ensuring safety during use.

[0017] 3. Compared with the prior art, the valve actuator handwheel mechanism, when switching and adjusting the position of the overall handwheel, uses an auxiliary positioning component to drive the ball bearing with the annular groove via a support spring, which can assist in positioning the handwheel. When the ball bearing is engaged in the annular groove on the upper side, the internal teeth mesh with the external gear plate, and the handwheel is in use. When the ball bearing is engaged in the annular groove on the lower side, the internal teeth disengage from the external gear plate, and the anti-rotation pin engages with the anti-rotation groove, and the handwheel is in a locked state. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention from one perspective;

[0019] Figure 2 This is a two-dimensional structural schematic diagram of the present invention from a different perspective;

[0020] Figure 3 for Figure 1 Enlarged structural diagram at point A in the middle;

[0021] Figure 4 This is a cross-sectional view of the handwheel sleeve of this utility model;

[0022] Figure 5 for Figure 4 Enlarged structural diagram at point B.

[0023] The attached diagram is labeled as follows: 1. Valve body; 2. Main shaft; 3. Valve core; 4. Pneumatic motor; 5. Positioning ring seat; 6. Limiting top seat; 7. External gear plate; 8. Handwheel sleeve; 9. Handwheel ring; 10. Internal gear; 11. Anti-rotation pin; 12. Anti-rotation groove; 13. Contact switch; 14. Ball bearing; 15. Support spring; 16. Annular groove. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The valve actuator handwheel mechanism involved in this utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] Reference Figures 1 to 5 This utility model provides a valve actuator handwheel mechanism, including a valve body 1, a main shaft 2 rotatably connected to the top of the valve body 1, a valve core 3 fixedly installed at the bottom end of the main shaft 2 inside the valve body 1, a pneumatic motor 4 for driving the rotation of the main shaft 2 fixedly installed at the top of the valve body 1, the pneumatic motor 4 being connected to an external drive system, and a handwheel switching mechanism provided at the top end of the main shaft 2 extending to the top of the pneumatic motor 4.

[0026] The handwheel switching mechanism includes a positioning ring seat 5 fixedly installed on the top of the pneumatic motor 4. The positioning ring seat 5 covers the outside of the main shaft 2. A limit seat 6 is fixedly installed on the top of the main shaft 2. An external gear plate 7 is fixedly installed on the lower end of the limit seat 6. A handwheel sleeve 8 is fitted on the surface of the main shaft 2. A handwheel ring 9 is fixedly installed on the outer wall of the handwheel sleeve 8. A stepped groove is opened at the upper end of the inner wall of the handwheel sleeve 8. The internal teeth 10 are arranged in a circumferential array inside the stepped groove. When the handwheel sleeve 8 moves upward, the internal teeth 10 mesh with the external gear plate 7.

[0027] When the valve actuator handwheel mechanism is in use, if manual operation is required, the handwheel sleeve 8 can be moved upwards, causing the internal teeth 10 to engage with the external gear disc 7. The main shaft 2 and valve core 3 can then be rotated using the handwheel ring 9 to achieve manual valve adjustment. When the main shaft 2 is driven to rotate by the pneumatic motor 4, the handwheel sleeve 8 and handwheel ring 9 can be moved downwards, causing the internal teeth 10 to disengage from the external gear disc 7. At this time, the handwheel ring 9 remains stationary and does not rotate with the main shaft 2, ensuring safety during valve operation.

[0028] The top of the positioning ring seat 5 is fixedly installed with three anti-rotation pillars 11 in a circular array, and the outer wall of the handwheel sleeve 8 is provided with several anti-rotation grooves 12 in a circular array, with the anti-rotation pillars 11 and anti-rotation grooves 12 corresponding to each other.

[0029] It is worth noting that by setting the anti-rotation post 11 and the anti-rotation groove 12, when the handwheel sleeve 8 is kept disengaged from the outer gear plate 7, the anti-rotation post 11 can be inserted into the anti-rotation groove 12 to securely position the handwheel sleeve 8 and prevent the handwheel from rotating due to friction between it and the main shaft 2.

[0030] A contact switch 13 is embedded in the top of the anti-rotation column 11. The contact switch 13 is connected to the pneumatic motor 4. When the anti-rotation column 11 is engaged with the anti-rotation groove 12, the contact switch 13 is in the connected state.

[0031] It is worth noting that by setting the contact switch 13, when the anti-rotation column 11 is engaged with the anti-rotation groove 12, the contact switch 13 is triggered by the handwheel sleeve 8, which can start the pneumatic motor 4. When the contact switch 13 is not triggered, the pneumatic motor 4 cannot be started, thus avoiding the situation where the pneumatic motor 4 drives the main shaft 2 and the handwheel to rotate when the handwheel is in use, and further ensuring safety in use.

[0032] The handwheel sleeve 8 is provided with an auxiliary positioning component corresponding to the main shaft 2. The auxiliary positioning component includes a mounting groove opened in the inner wall of the handwheel sleeve 8. A ball bearing 14 is movably installed inside the mounting groove, and a support spring 15 is provided on the inner wall of the mounting groove to drive the ball bearing 14 to move closer to the main shaft 2. An annular groove 16 is opened on the surface of the main shaft 2, and the positions of the ball bearing 14 and the annular groove 16 correspond to each other.

[0033] There are two annular grooves 16, and the two annular grooves 16 have different heights.

[0034] It is worth noting that when switching and adjusting the position of the overall handwheel, the auxiliary positioning component uses the support spring 15 to drive the ball bearing 14 to engage with the annular groove 16, which can assist in positioning the handwheel. When the ball bearing 14 is engaged in the annular groove 16 at the upper position, the internal teeth 10 mesh with the external gear plate 7, and the handwheel is in use. When the ball bearing 14 is engaged in the annular groove 16 at the lower position, the internal teeth 10 disengage from the external gear plate 7, and the anti-rotation post 11 engages with the anti-rotation groove 12, and the handwheel is in a locked state, ensuring the accuracy and stability of the handwheel positioning.

[0035] Finally, it should be noted that the accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

Claims

1. A valve actuator handwheel mechanism, comprising a valve body (1), characterized in that: The top of the valve body (1) is rotatably connected to a main shaft (2), the bottom end of the main shaft (2) extends into the valve body (1) and a valve core (3) is fixedly installed thereon, the top of the valve body (1) is fixedly installed with a pneumatic motor (4) for driving the main shaft (2) to rotate, and the top end of the main shaft (2) extends to the top of the pneumatic motor (4) and is provided with a handwheel switching mechanism; The handwheel switching mechanism includes a positioning ring seat (5) fixedly installed on the top of the pneumatic motor (4). The positioning ring seat (5) covers the outside of the main shaft (2). A limiting top seat (6) is fixedly installed on the top of the main shaft (2). An external gear plate (7) is fixedly installed on the lower end of the limiting top seat (6). A handwheel sleeve (8) is fitted on the surface of the main shaft (2). A handwheel ring (9) is fixedly installed on the outer wall of the handwheel sleeve (8). A stepped groove is opened at the upper end of the inner wall of the handwheel sleeve (8). The interior of the stepped groove is arranged in a circumferential array of internal teeth (10). When the handwheel sleeve (8) moves upward, the internal teeth (10) mesh with the external gear plate (7).

2. The valve actuator handwheel mechanism according to claim 1, characterized in that: The top of the positioning ring seat (5) is fixedly installed with three anti-rotation pillars (11) in a circular array, and the outer wall of the handwheel sleeve (8) is provided with several anti-rotation grooves (12) in a circular array. The anti-rotation pillars (11) and the anti-rotation grooves (12) are positioned corresponding to each other.

3. The valve actuator handwheel mechanism according to claim 2, characterized in that: The top of the anti-rotation column (11) is fitted with a contact switch (13), which is connected to the pneumatic motor (4). When the anti-rotation column (11) is engaged with the anti-rotation groove (12), the contact switch (13) is in the connected state.

4. The valve actuator handwheel mechanism according to claim 1, characterized in that: The handwheel sleeve (8) is provided with an auxiliary positioning component corresponding to the main shaft (2). The auxiliary positioning component includes a mounting groove opened in the inner wall of the handwheel sleeve (8). A ball bearing (14) is movably installed inside the mounting groove. A support spring (15) is provided on the inner wall of the mounting groove to drive the ball bearing (14) to move closer to the main shaft (2). An annular groove (16) is opened on the surface of the main shaft (2). The position of the ball bearing (14) corresponds to that of the annular groove (16).

5. A valve actuator handwheel mechanism according to claim 4, characterized in that: The number of annular grooves (16) is two, and the heights of the two annular grooves (16) are different.

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