A locking and unlocking mechanism and electric valve actuator thereof

Abstract

The utility model relates to the technical field of electric valve actuators, and discloses a locking and unlocking mechanism and an electric valve actuator thereof, comprising a fixed block, a rotating shaft movably passing through the axis of the fixed block, and a handwheel fixedly connected to one side of the rotating shaft; a locking and unlocking mechanism, wherein the locking and unlocking mechanism comprises a gear, a clamping block and an adjusting assembly, the clamping block can be movably engaged with the gear, and the adjusting assembly pushes the clamping block to move to lock and unlock the rotation; the adjusting assembly comprises a rectangular box, and a resisting block for pushing the clamping block is provided on one side of the rectangular box. The present application sets a locking and unlocking mechanism for limiting the rotation of the rotating shaft in the cavity of the fixed block. In the process of manually rotating the handwheel to control the valve in an unexpected situation of the electric valve actuator, the locking and unlocking mechanism can lock the rotating shaft, so that the handwheel cannot be rotated at will, thereby avoiding the rotation of the handwheel due to accidental touch during work, which causes the valve to be opened or closed and causes an accident.

Description

Technical Field

[0001] The utility model relates to the technical field of electric valve actuators, in particular to a locking and unlocking mechanism and an electric valve actuator thereof. Background Art

[0002] Electric valve actuator is a device that uses electrical energy to drive valve movement. It is widely used in many industries such as industrial automation, energy, water treatment, environmental protection, construction, chemical industry, pharmaceuticals, food and beverage, ocean and shipbuilding.

[0003] When the electric valve actuator is actually used, if an emergency situation occurs, emergency manual operation is required. The staff rotates the handwheel to control the opening and closing of the valve. The handwheel can be rotated at will. During work, the handwheel may rotate due to accidental touch, causing the valve to open or close and cause an accident. Therefore, a locking and unlocking mechanism is required for the handwheel to reduce the occurrence of accidents.

[0004] Therefore, those skilled in the art provide a locking and unlocking mechanism and an electric valve actuator thereof to solve the problems raised in the above background technology. Utility Model Content

[0005] The utility model mainly solves the technical problem of locking and unlocking a hand wheel, and provides a locking and unlocking mechanism and an electric valve actuator thereof.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A locking and unlocking mechanism, which comprises: a fixed block, an axis of the fixed block being movably penetrated by a rotating shaft, one side of the rotating shaft being fixedly connected to a hand wheel, a cylindrical cavity and a rectangular cavity being opened inside the fixed block, and the cylindrical cavity and the rectangular cavity being communicated with each other; a locking and unlocking mechanism, the locking and unlocking mechanism comprising a gear, a card block and an adjusting component, the gear being located in the cylindrical cavity, the adjusting component being located in the rectangular cavity, the card block being movably engaged with the gear, and the adjusting component pushing the card block to move to lock and unlock the rotation; the adjusting component comprising a rectangular box fixedly installed in the rectangular cavity, the card block movably penetrates the rectangular box, a resist block for pushing the card block is arranged on one side of the rectangular box, the resist block movably penetrates the screw rod, and the screw rod and the resist block are transmission-coordinated; a knob, the knob being arranged on an outer wall surface of one side of the fixed block, a connecting rod being fixedly connected between the knob and the screw rod, and the rotation of the knob drives the screw rod to rotate synchronously through the connecting rod.

[0008] According to the locking and unlocking mechanism, the rotating shaft is fixedly passed through the gear, a rectangular frame is also fixedly installed in the rectangular cavity, one side of the rectangular frame is fixedly connected to the rectangular box, the screw is rotatably installed in the rectangular frame, a through hole is opened between one side of the rectangular cavity and the outer wall of the fixed block, and the connecting rod movably passes through the through hole.

[0009] According to the locking and unlocking mechanism, the clamping block is fixedly connected to the limiting blocks on the two side walls in the rectangular box cavity, a guide rod is fixedly passed through the cavity of the rectangular box, and the guide rod movably passes through the limiting blocks.

[0010] According to the locking and unlocking mechanism, a compression spring is sleeved on the outer wall surface of the guide rod, and the compression spring is located between the side of the limit block away from the gear and the inner wall surface of the rectangular box.

[0011] According to the locking and unlocking mechanism, the block is L-shaped, one end of the block moves through the rectangular box and is fixedly connected to an anti-drop plate, the other end of the block moves in the rectangular frame cavity and is fixedly connected to a limit plate, the limit plate fits against the side wall of the rectangular frame, and the block is provided with a threaded through hole on one side wall of the rectangular frame cavity, the screw rod moves through the threaded through hole and passes through the block, and there is a threaded connection relationship between the screw rod and the block.

[0012] According to the locking and unlocking mechanism, the cross section of the clamping block is in the shape of a bullet head, and the tip of the clamping block can be clamped in the tooth groove of the gear.

[0013] An electric valve actuator comprises the electric valve actuator and the locking and unlocking mechanism described above, wherein the locking and unlocking mechanism is arranged in a fixed block to lock and unlock a rotating shaft.

[0014] The utility model provides a locking and unlocking mechanism and an electric valve actuator thereof, which have the following beneficial effects:

[0015] (1) The present application sets a locking and unlocking mechanism in the fixed block cavity to limit the rotation of the rotating shaft. When an unexpected situation occurs in the electric valve actuator and the handwheel needs to be manually rotated to control the valve, the locking and unlocking mechanism can lock the rotating shaft so that the handwheel cannot be rotated at will, thereby avoiding accidental rotation of the handwheel due to accidental touch during work, which may cause the valve to open or close and cause an accident.

[0016] (2) The stop block is set in an L shape, and a threaded through hole is opened on one side wall of the rectangular box cavity. The screw rod movably passes through the stop block through the threaded through hole. During the rotation of the screw rod, the stop block is inserted into the rectangular box cavity to hold the card block. The card block is stuck in the tooth groove of the gear to limit the rotation of the gear and achieve a locking effect; the reverse rotation of the stop block drives the screw rod to reverse, and the stop block is moved out of the rectangular box cavity. The card block can be moved to complete the unlocking. The anti-slip plate is set to prevent the stop block from slipping out of the rectangular box cavity. The limit plate is set to limit the stop block, thereby improving the stability of the structure.

[0017] (3) The card block is fixedly connected to the limit block on the two side walls of the rectangular box cavity, and the guide rod movably passes through the limit block. The limit block moves along the guide rod. A compression spring is sleeved on the outer wall of the guide rod. When the gear rotates in the unlocked state, the card block is pushed toward the rectangular box, and the compression spring gives the card block a reaction force to reset the card block. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the position relationship between the hand wheel, the fixed block and the knob;

[0019] Figure 2 It is a schematic diagram of the positional relationship among the rotating shaft, gears and locking and unlocking mechanisms;

[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the adjustment component;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the card block;

[0023] Figure 6 It is a schematic diagram of the cross section of the fixed block.

[0024] Legend:

[0025] 10. Fixed block; 11. Rotating shaft; 12. Hand wheel; 13. Knob; 14. Gear; 15. Rectangular box; 16. Rectangular frame; 17. Screw rod; 18. Connecting rod; 19. Block; 20. Limit block; 21. Guide rod; 22. Compression spring; 23. Stop block; 24. Anti-slip plate; 25. Limit plate; 26. Threaded through hole; 27. Cylindrical cavity; 28. Rectangular cavity; 29. ​​Through hole. DETAILED DESCRIPTION

[0026] like Figure 1-6As shown: a locking and unlocking mechanism, which includes: a fixed block 10, a rotating shaft 11 movably penetrates the axis of the fixed block 10, a hand wheel 12 is fixedly connected to one side of the rotating shaft 11, a cylindrical cavity 27 and a rectangular cavity 28 are opened inside the fixed block 10, and the cylindrical cavity 27 and the rectangular cavity 28 are interlinked; a locking and unlocking mechanism, the locking and unlocking mechanism includes a gear 14, a clamping block 19 and an adjusting component, the gear 14 is located in the cylindrical cavity 27, the adjusting component is located in the rectangular cavity 28, the clamping block 19 can be movably engaged with the gear 14, and the adjusting component pushes the clamping block 19 to move. 9 is movable to lock and unlock the rotation of the fixed block 10; the adjustment component includes a rectangular box 15 fixedly installed in the rectangular cavity 28, a block 19 movably penetrates the rectangular box 15, and a stopper 23 for pushing the block 19 is arranged on one side of the rectangular box 15, the stopper 23 movably penetrates the screw rod 17, and the screw rod 17 cooperates with the stopper 23 in transmission; the knob 13 is arranged on the outer wall surface of one side of the fixed block 10, and a connecting rod 18 is fixedly connected between the knob 13 and the screw rod 17, and the rotation of the knob 13 drives the screw rod 17 to rotate synchronously through the connecting rod 18.

[0027] An electric valve actuator comprises an electric valve actuator and the locking and unlocking mechanism described above. The locking and unlocking mechanism is arranged in a fixed block 10 to lock and unlock a rotating shaft 11.

[0028] It is worth noting that the electric valve actuator is a device that uses electrical energy to drive the valve. One type of electric valve actuator in the prior art (publication number: CN112303316A) has been disclosed and will not be described in detail here.

[0029] Specifically, the present application sets a locking and unlocking mechanism in the cavity of the fixed block 10 to limit the rotation of the rotating shaft 11. When an unexpected situation occurs in the electric valve actuator and the handwheel 12 needs to be manually rotated to control the valve, the locking and unlocking mechanism can lock the rotating shaft 11 so that the handwheel 12 cannot be rotated at will, thereby avoiding the handwheel 12 rotating due to accidental touch during work, which may cause the valve to open or close and cause an accident.

[0030] The rotating shaft 11 is fixedly passed through the gear 14, and a rectangular frame 16 is also fixedly installed in the rectangular cavity 28. One side of the rectangular frame 16 is fixedly connected to the rectangular box 15. The screw 17 is rotatably installed in the rectangular frame 16. A through hole 29 is provided between one side of the rectangular cavity 28 and the outer wall of the fixed block 10. The connecting rod 18 movably passes through the through hole 29. One end of the connecting rod 18 is fixedly connected to the stop block 23, and the other end of the connecting rod 18 movably passes through the rectangular frame 16 and is fixedly connected to the screw 17. The cross section of the block 19 is bullet-shaped, and the tip of the block 19 can be stuck in the tooth groove of the gear 14.

[0031] Specifically, a rotating shaft 11 is fixedly arranged to pass through the gear 14, and the rotating shaft 11 rotates to transmit the gear 14 to rotate synchronously. A rectangular frame 16 is arranged to be fixedly installed in the rectangular cavity 28. The staff rotates the knob 13, and the knob 13 drives the screw rod 17 to rotate synchronously through the connecting rod 18. The rotation of the screw rod 17 causes the stop block 23 to move and push the block 19 out to be stuck in the tooth groove of the gear 14, thereby limiting the rotation of the gear 14, thereby completing the locking of the rotation of the rotating shaft 11 and the handwheel 12.

[0032] The clamping block 19 is fixedly connected to the limiting block 20 on both side walls of the cavity of the rectangular box 15. A guide rod 21 is fixedly passed through the cavity of the rectangular box 15, and the guide rod 21 movably passes through the limiting block 20. A compression spring 22 is sleeved on the outer wall of the guide rod 21, and the compression spring 22 is located between the side of the limiting block 20 away from the gear 14 and the inner wall of the rectangular box 15.

[0033] Specifically, by setting the card block 19 to be fixedly connected to the limit block 20 on the two side walls of the cavity of the rectangular box 15, the guide rod 21 movably passes through the limit block 20, and the limit block 20 moves along the guide rod 21. By sleeved with a compression spring 22 on the outer wall of the guide rod 21, the card block 19 is pushed toward the rectangular box 15 during the rotation of the gear 14 in the unlocked state, and the compression spring 22 gives a reaction force to the card block 19 to reset the card block 19.

[0034] The stop block 23 is L-shaped, one end of the stop block 23 movably passes through the rectangular box 15 and is fixedly connected to an anti-slip plate 24, the other end of the stop block 23 moves in the cavity of the rectangular frame 16 and is fixedly connected to a limit plate 25, the limit plate 25 is in contact with the side wall of the rectangular frame 16, and the stop block 23 is provided with a threaded through hole 26 on one side wall of the cavity of the rectangular frame 16, the screw rod 17 movably passes through the stop block 23 through the threaded through hole 26, and the screw rod 17 and the stop block 23 are in a threaded connection relationship.

[0035] Specifically, the stop block 23 is set to be L-shaped, and a threaded through hole 26 is opened on one side wall of the rectangular frame 16 cavity. The screw 17 movably passes through the stop block 23 through the threaded through hole 26. During the rotation of the screw 17, the stop block 23 is inserted into the cavity of the rectangular box 15 to hold the block 19. The block 19 is stuck in the tooth groove of the gear 14 to limit the rotation of the gear 14 and achieve a locking effect; the reverse rotation of the stop block 23 drives the screw 17 to reverse, and the stop block 23 is moved out of the rectangular box 15 cavity, and the block 19 can be moved to complete the unlocking, and the anti-slip plate 24 is provided to prevent the stop block 23 from slipping out of the rectangular box 15 cavity, and the limit plate 25 is provided to limit the stop block 23, thereby improving the stability of the structure.

[0036] The working principle of a locking and unlocking mechanism and its electric valve actuator in the present application is as follows: a staff member rotates the knob 13, and the knob 13 drives the screw rod 17 to rotate synchronously through the connecting rod 18. The stop block 23 is L-shaped, and a threaded through hole 26 is opened on one side wall of the stop block 23 in the cavity of the rectangular frame 16. The screw rod 17 movably penetrates the stop block 23 through the threaded through hole 26. During the rotation of the screw rod 17, the stop block 23 is inserted into the cavity of the rectangular box 15 to hold the block 19, and the block 19 cannot move. The block 19 is stuck in the tooth groove of the gear 14 to limit the rotation of the gear 14 to achieve a locking effect. The reverse rotation of the stop block 23 drives the screw rod 17 to reverse, and the stop block 23 is moved out of the cavity of the rectangular box 15. The block 19 can move to complete the unlocking.

[0037] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A locking and unlocking mechanism, characterized in that: include: A fixed block (10), wherein a rotating shaft (11) movably penetrates the axis of the fixed block (10), a hand wheel (12) is fixedly connected to one side of the rotating shaft (11), and a cylindrical cavity (27) and a rectangular cavity (28) are provided inside the fixed block (10), and the cylindrical cavity (27) and the rectangular cavity (28) are interconnected; A locking and unlocking mechanism, the locking and unlocking mechanism comprising a gear (14), a clamping block (19) and an adjusting component, the gear (14) being located in a cylindrical cavity (27), the adjusting component being located in a rectangular cavity (28), the clamping block (19) being movably engaged with the gear (14), and the adjusting component pushing the clamping block (19) to move the rotation of the pair to lock and unlock; The adjustment assembly comprises a rectangular box (15) fixedly mounted in a rectangular cavity (28); a clamping block (19) movably penetrates the rectangular box (15); a stopper (23) for pushing the clamping block (19) is arranged on one side of the rectangular box (15); the stopper (23) movably penetrates the screw rod (17); the screw rod (17) and the stopper (23) are in transmission cooperation; The knob (13) is arranged on an outer wall surface of one side of the fixed block (10); a connecting rod (18) is fixedly connected between the knob (13) and the screw rod (17); the rotation of the knob (13) drives the screw rod (17) to rotate synchronously through the connecting rod (18).

2. The locking and unlocking mechanism according to claim 1, characterized in that: The rotating shaft (11) is fixedly passed through the gear (14); a rectangular frame (16) is also fixedly installed in the rectangular cavity (28); one side of the rectangular frame (16) is fixedly connected to the rectangular box (15); the screw rod (17) is rotatably installed in the rectangular frame (16); a through hole (29) is provided between one side of the rectangular cavity (28) and the outer wall of the fixed block (10); and the connecting rod (18) movably passes through the through hole (29).

3. The locking and unlocking mechanism according to claim 1, characterized in that: The clamping block (19) is fixedly connected to a limiting block (20) on both side walls of the cavity of the rectangular box (15); a guide rod (21) is fixedly passed through the cavity of the rectangular box (15); and the guide rod (21) movably passes through the limiting block (20).

4. The locking and unlocking mechanism according to claim 3, characterized in that: A compression spring (22) is sleeved on the outer wall surface of the guide rod (21), and the compression spring (22) is located between the side of the limit block (20) away from the gear (14) and the inner wall surface of the rectangular box (15).

5. The locking and unlocking mechanism according to claim 1, characterized in that: The stop block (23) is L-shaped, one end of the stop block (23) movably penetrates the rectangular box (15) and is fixedly connected to an anti-drop plate (24), the other end of the stop block (23) movably penetrates the rectangular box (15) and is fixedly connected to a limit plate (25), the limit plate (25) is in contact with the side wall of the rectangular frame (16), a threaded through hole (26) is provided on one side wall of the rectangular frame (16) cavity of the stop block (23), the screw rod (17) movably penetrates the stop block (23) through the threaded through hole (26), and a threaded connection relationship is formed between the screw rod (17) and the stop block (23).

6. The locking and unlocking mechanism according to claim 1, characterized in that: The cross section of the clamping block (19) is in the shape of a bullet head, and the tip of the clamping block (19) can be clamped in the tooth groove of the gear (14).

7. An electric valve actuator, characterized in that: It comprises an electric valve actuator and a locking and unlocking mechanism as claimed in any one of claims 1 to 6, wherein the locking and unlocking mechanism is arranged in a fixed block (10) to lock and unlock a rotating shaft (11).

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