Manual and automatic switching device of valve electric actuator

Abstract

The utility model provides a manual and automatic switching device of a valve electric actuator, which comprises a clutch rotating shaft, two transmission gears are coaxially connected onto the clutch rotating shaft, the two transmission gears are respectively connected with a manual module and an electric module, and a clutch wheel is arranged between the two transmission gears; the clutch wheel can move in the axial direction of the clutch rotating shaft, and when the clutch wheel moves to the limiting position in the axial direction of the clutch rotating shaft, the clutch wheel and the two transmission gears can rotate synchronously. The supporting column is arranged between the first transmission gear and the clutch wheel, when the supporting column is in a vertical posture, one end of the supporting column can abut against the first transmission gear, and the other end of the supporting column supports the clutch wheel to rotate synchronously with the second transmission gear; when the supporting column is in the lodging posture, the clutch wheel and the first transmission gear can rotate synchronously, and the supporting column is provided with a limiting column matched with the limiting flange. According to the utility model, the posture of the supporting column is changed, so that the electric actuator can be switched between a manual mode and an automatic mode, a pressure spring is omitted, and the electric actuating mechanism is simplified and is more convenient to mount.

Description

Technical Field

[0001] The utility model belongs to the field of valve control, and particularly relates to a manual-automatic switching device for a valve electric actuator. Background Technique

[0002] A valve electric actuator refers to a machine that uses electric energy as the main energy source to drive a valve. It controls the opening and closing of the valve through a motor. However, in special cases, manual operation of the electric actuator is also required to emergently control the valve. To achieve the switching between manual operation and automatic operation, a clutch is provided inside the existing electric actuator to switch the torque transmission module. In the existing clutch switching structure, usually, by operating a switching handle shaft, the switching body on the switching handle shaft is driven to rotate clockwise. The switching body is connected with a torsion spring, and the torsion spring is used to maintain the engaged or separated state of the clutch. One end of the switching body presses down the clutch. In the axial direction of the clutch, a compression spring is installed. Through the contact between the switching body and the clutch, the compression spring is compressed to achieve the purpose of changing the position of the clutch. When the force applied to the switching handle shaft is removed, the compression spring resets, the clutch rises, driving the switching body to rotate counterclockwise to achieve the effect of clutch reset. Although this structure of adding a compression spring in the axial direction of the clutch and adjusting the position of the clutch through the contact of the switching body can achieve the effect of clutch reset, in actual application, the overall switching structure needs to be fixed by a frame, and the torsion spring needs to be compressed during the installation of the switching body, resulting in inconvenient installation for operators. Moreover, each time the manual and automatic modes are switched, a wrench needs to be pulled, and the operation is complex. Content of the Utility Model

[0003] In view of this, the utility model aims to propose a manual-automatic switching device for a valve electric actuator to simplify the structure of the manual-automatic switching of the electric actuator and make the switching structure more convenient for installation.

[0004] To achieve the above object, the technical solution of the utility model is realized as follows:

[0005] A manual-automatic switching device for a valve electric actuator includes

[0006] a clutch rotating shaft, on which a first transmission gear and a second transmission gear are coaxially connected. The first transmission gear is in transmission connection with a manual module, and the second transmission gear is in transmission connection with an electric module. A clutch wheel is arranged between the first transmission gear and the second transmission gear;

[0007] The clutch wheel can move axially along the clutch rotating shaft. When the clutch wheel moves axially along the clutch rotating shaft to the limit position, it can respectively adhere to and rotate synchronously with the first transmission gear or the second transmission gear;

[0008] A support column is disposed between the first transmission gear and the clutch wheel. The support column can be rotated around a rotating shaft to change to a vertical posture or a fallen posture. When the support column is in the vertical posture, one end of the support column can abut against the first transmission gear, and the other end supports the synchronous rotation of the clutch wheel and the second transmission gear. When the support column is in the fallen posture, the clutch wheel can rotate synchronously with the first transmission gear.

[0009] Further, the rotating shaft of the support column is disposed at one end of the support column, and the end of the support column that abuts against the first transmission gear is away from the rotating shaft of the support column, and the axial direction of the rotating shaft is perpendicular to the axial direction of the support column.

[0010] Further, the end of the support column that abuts against the first transmission gear is provided with an abutting plane, and a fillet is formed at the edge of the abutting plane.

[0011] Further, a support head is provided at the top end of the support column in the direction of the clutch wheel. A convex platform extends outward along the circumference of the clutch wheel, and the convex platform can be lapped on the support head.

[0012] Further, meshing teeth extend axially from both end faces of the clutch wheel. Meshing teeth extend toward the clutch wheel from the surfaces of the first transmission gear and the second transmission gear facing the clutch wheel. The clutch wheel rotates synchronously with the first transmission gear or the second transmission gear through the mutually cooperating meshing teeth.

[0013] Further, the switching device further includes a limiting piece provided with a limiting edge. A limiting column is provided in the middle of the support column. When the support column changes from the fallen posture to the vertical posture, the limiting column can abut against the limiting edge and move.

[0014] Further, the switching device further includes a switching crank. The end of the switching crank is connected to the support column through a rotating shaft, and the switching crank can rotate around the other end of itself.

[0015] Further, the support head is formed by the outward extension of the crank.

[0016] Further, the knob is connected to the crank through a connecting shaft, and the connecting shaft passes through the limiting piece.

[0017] Compared with the prior art, the manual-automatic switching device of the valve electric actuator described in the present utility model has the following advantages:

[0018] The present utility model drives the position change of the clutch wheel by the posture change of the support column, so that the electric actuator realizes the switching between the manual and automatic modes, eliminates the compression spring, simplifies the structure of the electric actuator mechanism, makes the electric actuator structure more convenient for installation, and at the same time, through the cooperation of the limiting column and the limiting frame, ensures the reliability of the switching process;

[0019] The support column and the first transmission gear are offset against each other. When the automatic mode needs to be switched, it is only necessary to start the motor of the electric actuator to drive the first transmission gear to rotate, thereby quickly destroying the force position of the support column, causing the support column to fall down, and switching the electric actuator to the automatic state, eliminating the step of turning the wrench back and forth. At the same time, when the electric actuator suddenly works electrically, the transmission connection of the manual operation is directly cut off, which protects the operator.

[0020] The support head is arranged on the crank to prevent the clutch wheel from affecting the support column in the process of rotation, causing the support column to fall down accidentally.

[0021] The limiting rib and the limiting column are matched to ensure that the supporting column rotates around the rotating shaft when the crank drives the supporting column to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0023] Figure 1 It is a schematic diagram of the internal transmission mechanism of the electric actuator;

[0024] Figure 2 It is a schematic diagram of the hand automatic transformation structure;

[0025] Figure 3 It is a cross-sectional schematic diagram of the hand automatic transformation structure;

[0026] Figure 4 It is a schematic diagram of the vertical posture of the support column;

[0027] Figure 5 This is a schematic diagram of the posture of the support column after it falls to both sides;

[0028] Figure 6 It is a schematic diagram of the clutch wheel structure;

[0029] Figure 7 It is a schematic diagram of the support column structure;

[0030] Figure 8 It is a schematic diagram of the limiting frame structure in the limiting piece.

[0031] Description of reference numerals:

[0032] 1 - Clutch rotating shaft; 11 - First transmission gear; 12 - Second transmission gear; 13 - Clutch wheel; 131 - Engaging teeth; 132 - Boss; 2 - Support column; 21 - Abutting plane; 22 - Limit post; 3 - Crank; 31 - Support head; 32 - Rotating shaft; 4 - Knob; 5 - Connecting shaft; 6 - Torque output gear; 7 - Execution gear; 8 - Limit piece; 81 - Limit frame; 811 - Limit retaining edge; 812 - Accommodating part. Detailed implementation mode

[0033] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0034] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0035] In the description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0036] The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0037] The manual-automatic switching device of the valve electric actuator described in the present utility model includes a clutch rotating shaft 1, on which a first transmission gear 11 and a second transmission gear 12 are sleeved. The first transmission gear 11 is in transmission connection with the manual module, and the second transmission gear 12 is in transmission connection with the electric module. A clutch wheel 13 is placed between the first transmission gear 11 and the second transmission gear 12, and the clutch wheel 13 rotates synchronously with the clutch rotating shaft 1. In this embodiment, the clutch wheel 13 is connected to the clutch rotating shaft 1 through a spline or a sliding key; A support column 2 is provided between the first transmission gear 11 and the clutch wheel 13. One end of the support column 2 is connected to a crank 3 through a rotating shaft 32. The axial length of the rotating shaft 32 is perpendicular to the length direction of the support column 2, and the crank 3 can rotate around the other end of itself. When the crank 3 rotates, it can drive one end of the support column 2 to move upward. Under the action of the rotating shaft 32 and its own gravity, the support column 2 can be transformed from a fallen posture to a vertical posture. A support head 31 extends outward from the end of the crank 3. A convex platform 132 extends outward along the circumference of the edge of the clutch wheel 13, and the support head 31 is below the convex platform 132. When the support head 31 moves upward, the clutch wheel 13 can make the clutch wheel 13 move synchronously along the axial direction of the clutch rotating shaft 1 through the cooperation of the convex platform 132 and the support head 31. When the support column 2 is in a vertical state, the bottom end of the support column 2 abuts against the first transmission gear 11, so that the support column 2 maintains a fixed posture, and further makes the support head 31 in the upper limit position, and at the same time makes the clutch wheel 13 in the upper limit position; When the support column 2 rotates to a fallen state, the support head 31 is in the lower limit position, and the support head 31 is placed between the convex platform 132 and the first transmission gear 11. Optionally, the support head 31 can also be integrally formed with the support column 2.

[0038] Optionally, the clutch wheel 13 can be frictionally connected with the first transmission gear 11 and the second transmission gear 12, so that when the clutch wheel 13 is in the upper limit position, the upper end surface of the clutch wheel 13 is attached to the second transmission gear 12. When the operator rotates the handwheel of the manual operation module, the torque is transmitted to the second transmission gear 12 through gear transmission, and then the second transmission gear 12 drives the clutch wheel 13 to rotate through the action of friction. Similarly, when the clutch wheel 13 is in the lower limit position, the clutch wheel 13 is attached to the first transmission gear 11. When the electric module is started, the motor transmits the torque to the first transmission gear 11 through gear transmission and drives the clutch wheel 13 to rotate through friction, so as to make the clutch rotating shaft 1 rotate. In this embodiment, a torque output gear 6 is provided on the clutch rotating shaft 1. When the clutch rotating shaft 1 rotates, the torque output gear 6 drives an execution gear 7 on one side. The execution gear 7 is connected to the valve stem of the valve through a linkage shaft, so as to drive the valve stem of the valve to move along the axis or rotate around the axis according to the scene requirements.

[0039] In this embodiment, in order to improve the reliability of torque transmission between the clutch wheel 13, the first transmission gear 11, and the second transmission gear 12, meshing teeth 131 extend axially from both end faces of the clutch wheel 13. The surfaces of the first transmission gear 11 and the second transmission gear 12 facing the clutch wheel 13 extend towards the clutch wheel 13 to form meshing teeth 131. The clutch wheel 13 rotates synchronously with the first transmission gear 11 or the second transmission gear 12 through the mutually engaged meshing teeth 131.

[0040] One end of the support column 2 away from the rotating shaft 32 is provided with an abutting plane 21, and a fillet is formed at the edge of the abutting plane 21. When the support column 2 maintains a vertical posture, when the first transmission gear 11 rotates, the force between the abutting surface of the support column 2 and the first transmission gear 11 is unstable, causing the support column 2 to deflect and fall to one side. The design of the fillet prevents the support column 2 from scratching the first transmission gear 11.

[0041] The manual / automatic switching device of the valve electric actuator according to the present invention further includes a limit piece 8. The crank 3 is connected to a knob 4 through a connecting shaft 5, and the crank 3 passes through the limit piece 8 so that the knob 4 is placed outside the electric actuator, facilitating the operator to operate the knob 4. An irregular hole is formed in the limit piece 8 as a limit frame 81. Two limit blocking edges 811 are provided at the upper edge of the limit frame 81, and the two limit blocking edges 811 are inclined, and their tops are connected to each other so that the two limit blocking edges 811 are arranged in an inverted V shape. A receiving portion 812 is further provided below the two limit blocking edges. A limit post 22 extends outward from the middle of the support column 2. When the support column 2 is in a fallen posture, the limit post 22 is placed at the lower end of one of the limit blocking edges 811, that is, the end away from the other limit blocking edge. More specifically, at this time, the support column can be placed in the receiving portion 812. When the support column 2 changes to a vertical posture, the limit blocking edge 811 can pull down the support column 2 through the limit post 22, so that the support column 2 is in a vertical posture, preventing the support column 2 from being unable to rotate with the rotating shaft 32 when the support column 2 is stuck with the rotating shaft 32.

[0042] For the manual-automatic switching device of the valve electric actuator described in the present utility model, during the installation process, the assembler only needs to assemble each part in a predetermined order without involving parts such as springs, and does not need to work on the elastic force of the spring by the customer, which reduces the labor intensity of the assembler and the installation difficulty. During the working process, the support column 2 can be rotated to a vertical posture by rotating the knob 4, so that the engaging teeth 131 at the top of the clutch wheel 13 are engaged with the engaging teeth 131 of the second transmission gear 12, so that the second transmission gear 12 can drive the clutch wheel 13 and the clutch rotating shaft 1 to rotate, thereby completing the change of the valve state; when it is necessary to switch to the automatic control state, only need to start the motor of the electric actuator, then the first transmission gear 11 can be rotated, and then the support column 2 is changed to a lying posture, so that the engaging teeth 131 at the bottom of the clutch wheel 13 are engaged with the engaging teeth 131 of the first transmission gear 11, so that the first transmission gear 11 drives the clutch rotating shaft 1 to rotate.

[0043] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A manual-automatic switching device for a valve electric actuator, characterized in that: Including a clutch rotating shaft, on which a first transmission gear and a second transmission gear are coaxially connected, the first transmission gear is in transmission connection with a manual module, the second transmission gear is in transmission connection with an electric module, and a clutch wheel is arranged between the first transmission gear and the second transmission gear; the clutch wheel can move axially along the clutch rotating shaft, and when the clutch wheel moves axially along the clutch rotating shaft to the limit position, it can respectively abut against the first transmission gear or the second transmission gear and rotate synchronously; a support column, which is arranged between the first transmission gear and the clutch wheel, the support column can be rotated around a rotating shaft to change into a vertical posture or a lying posture, and when the support column is in the vertical posture, one end of the support column can abut against the first transmission gear, and the other end supports the clutch wheel to rotate synchronously with the second transmission gear; when the support column is in the lying posture, the clutch wheel can rotate synchronously with the first transmission gear; the support column extends outwards to form a limit column, the limit column passes through a limit frame, the limit frame includes at least one limit stop edge, and when the support column rotates from the lying posture to the vertical posture, the limit column can abut against the limit stop edge and move along the limit stop edge.

2. The manual / automatic switching device of an electric valve actuator according to claim 1, characterized in that: There are two limit stop edges, and one ends of the two limit stop edges are connected to each other so that the two limit stop edges form a V shape. When the support column is in the lying posture, the limit column is placed at the end of one limit stop edge far from the other limit stop edge. When the support column is in the vertical posture, the limit column is placed at the end where the two limit stop edges are connected.

3. The manual / automatic switching device of an electric valve actuator according to claim 1 or 2, characterized in that: The limit frame further includes a receiving portion arranged at the bottom end of the limit stop edge. When the support column is in the lying posture, the limit column is placed in the receiving portion.

4. The manual-automatic switching device of a valve electric actuator according to claim 1, characterized in that: The rotating shaft of the support column is arranged at one end of the support column, and the end of the support column abutting against the first transmission gear is far from the rotating shaft of the support column, and the axial direction of the rotating shaft is perpendicular to the axial direction of the support column.

5. The manual-automatic switching device of a valve electric actuator according to claim 1, characterized in that: The end of the support column abutting against the first transmission gear is provided with an abutting plane, and a fillet is formed at the edge of the abutting plane.

6. The manual / automatic switching device of a valve electric actuator according to claim 1, characterized in that: A support head is arranged at the top end of the support column towards the clutch wheel. A boss extends outwards along the circumference of the clutch wheel, and the boss can be lapped on the support head.

7. The manual / automatic switching device of an electric valve actuator according to claim 1, characterized in that: Meshing teeth extend axially from both end faces of the clutch wheel. Meshing teeth extend towards the clutch wheel from the surfaces of the first transmission gear and the second transmission gear facing the clutch wheel. The clutch wheel rotates synchronously with the first transmission gear or the second transmission gear through the mutually matching meshing teeth.

8. The manual / automatic switching device of a valve electric actuator according to claim 6, characterized in that: It further includes a limit piece, and the limit frame is a special-shaped hole opened on the limit piece.

9. The manual / automatic switching device of an electric valve actuator according to claim 8, characterized in that: It further includes a switching crank, the end of the switching crank is connected to the support column through a rotating shaft, and the switching crank can rotate around the other end of itself.

10. The manual / automatic switching device of a valve electric actuator according to claim 8, characterized in that: The support head is formed by the outward extension of the crank.

Images