Electric and Manual Quick Switching Device for Actuator

Abstract

The present invention relates to an electric and manual quick switching device for an actuator, comprising an executed element and an actuator connected to the executed element, wherein the executed element and the actuator are connected via an electric and manual quick switching mechanism. The present invention can use manual quick operation to operate the executed element when the actuator fails (or loses power or air). Compared with the manual function of the actuator, it has the characteristics of reducing the operation process and shortening the operation time in an emergency situation, and can restore to the electric state by removing the operating handle after manual resetting. The electric to manual quick switching operation device for the actuator can be installed with a detection element as needed, display the current state in real time, realize manual and electric interlocking, prevent misoperation, and protect the safety of operators.

Description

Technical Field:

[0001] The present invention relates to the technical field of actuators, and in particular to an electric and manual quick switching device for an actuator. Background Art:

[0002] Currently, the manual function of a conventional actuator, as Figure 1 shown, when operating manually, a special operating handle 1 must be inserted into the actuator, and the handle is shaken in a specific direction to drive the actuator to operate, and then the actuator drives the element to be actuated. In case of an emergency, the operating direction is likely to be chaotic, and the operating time is relatively long due to too many operating turns. There is no electric-manual interlock function, and electric misoperation is likely to occur during manual operation. Summary of the Invention:

[0003] Aiming at the defects in the prior art, the present invention provides an electric and manual quick switching device for an actuator, which can quickly separate the transmission connection between the actuator and the element to be actuated, and quickly operate the element to be actuated manually.

[0004] The present invention is realized by the following technical solutions:

[0005] An electric and manual quick switching device for an actuator includes an element to be actuated and an actuator connected to the element to be actuated. The element to be actuated and the actuator are connected through an electric and manual quick switching mechanism. The electric and manual quick switching mechanism includes an active connecting piece, a passive connecting piece, a central pin and a plug-in handle. The active connecting piece is fixed to the output shaft of the actuating element. Through grooves penetrating the wall thickness are correspondingly formed on both sides of the active connecting piece. The central pin is arranged in the active connecting piece and elastically expands and contracts through a spring. The central pin can move up and down along the through grooves. The passive connecting piece is fixed to the valve core in the element to be actuated. The passive connecting piece is correspondingly arranged below the active connecting piece. Slots penetrating the wall thickness and capable of embedding both ends of the central pin are formed on both sides of the passive connecting piece. One end of the plug-in handle has a plug block capable of being inserted into and penetrating through the two slots. The plug block can push the central pin to move upward to realize the electric-manual switching.

[0006] During the manual operation process, in order to avoid danger caused by simultaneous execution of electric operation due to misoperation, the present invention designs a special interlock structure.

[0007] Specifically, the top surface height of the insertion block is higher than the bottom surface height of the active connector. An arc-shaped interlocking groove corresponding to the cylinder wall of the active connector is provided on the top surface and / or the bottom surface at one end of the insertion block. Both ends of the arc-shaped interlocking groove penetrate through the two side surfaces of the insertion block. When the insertion block rotates, the cylinder wall of the active connector can be embedded into the arc-shaped interlocking groove and move relative to the arc-shaped interlocking groove. The top surface and / or the bottom surface at the other end of the insertion block has a downward-sloping ramp surface, and the height of the ramp surface is lower than the bottom surface height of the active connector.

[0008] In order to accurately sense whether it is in the manual operation state, an arc-shaped signal detection block is fixed outside the central pin. The arc-shaped signal detection block is sleeved outside the active connector, and a proximity switch corresponding to it is arranged on one side of the arc-shaped signal detection block.

[0009] In order to position the plug-in handle and prevent it from shaking back and forth during rotation, a positioning pin is arranged inside the central pin. The spring is sleeved outside the positioning pin. The central pin drives the positioning pin through the spring to achieve elastic expansion and contraction. The bottom end of the positioning pin penetrates through the bottom surface of the active connector, and a positioning hole for the bottom end of the positioning pin to be embedded is provided on the insertion block.

[0010] In order to facilitate the installation of each component, the component to be actuated and the actuator are fixed to each other through a bracket.

[0011] In order to accurately control the rotation range of the component to be actuated, a limiting rod for restricting the rotation range of the plug-in handle is fixed on the bracket; the limiting rod includes a starting-state limiting rod and a final-state limiting rod.

[0012] The beneficial effects of the present invention are as follows: The actuator electric and manual quick switching device of the actuator can adopt manual quick operation to actuate the component to be actuated in the state of actuator failure (or power failure, air failure). Compared with the built-in manual function of the actuator, it has the characteristics of reducing the operation process, shortening the operation time in case of emergency, and returning to the electric state immediately after manually resetting and removing the operation handle. The actuator electric to manual quick switching operation device can be installed with detection components as required, display the current state in real time, achieve manual and electric interlocking, prevent misoperation, and protect the safety of operators. Description of the drawings:

[0013] Figure 1 It is a three-dimensional structure schematic diagram of an actuator electric and manual switching device in the prior art;

[0014] Figure 2 It is a three-dimensional structure schematic diagram of the actuator electric and manual quick switching device of the present invention;

[0015] Figure 3 It is a structure schematic diagram of the electric and manual quick switching mechanism of the present invention without a handle;

[0016] Figure 4 Structural schematic diagrams of the active connector and the passive connector of the present invention;

[0017] Figure 5 Structural schematic diagram of the center pin of the present invention;

[0018] Figure 6 Structural schematic diagram of the electric and manual quick switching mechanism of the present invention in the handle state;

[0019] Figure 7 Three-dimensional structural schematic diagram of the plug-in handle of the present invention. Specific embodiments:

[0020] The following describes in detail the preferred embodiments of the present invention with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention. The directional terms mentioned in the present invention, such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", etc., are only references to the directions in the attached drawings. Therefore, the directional terms used are for explaining and understanding the present invention, rather than for limiting the present invention.

[0021] As Figure 2 shown, an electric and manual quick switching device for an actuator includes an element to be actuated 3 installed at the bottom end of a bracket 4 and an actuator 2 installed at the top end of the bracket. The element to be actuated 3 and the actuator 2 are connected by an electric and manual quick switching mechanism.

[0022] The electric and manual quick switching mechanism includes an active connector 5, a passive connector 6, a center pin, and a plug-in handle 7. The active connector 5 is a cylindrical hollow structure, and its top end is fixed to the output shaft of the actuator 2. The passive connector 6 is also a cylindrical hollow structure, and its outer diameter is the same as that of the active connector 5. It is correspondingly arranged below the active connector 5. The top surface of the passive connector 6 is in contact with the bottom surface of the active connector 5. The bottom end of the passive connector 6 is fixed to the valve core in the element to be actuated 3. The center pin is arranged inside the active connector 5.

[0023] Combined with Figures 3 - 5As shown, guide grooves 11 penetrating through the wall thickness are formed on the front and rear sides of the active connecting member 5. The two guide grooves 11 are rectangular structures and are symmetrically arranged. The center pin 8 is arranged inside the active connecting member 5. A positioning pin 9 is arranged inside the center pin 8. A spring 10 is sleeved outside the positioning pin 9. The center pin 8 realizes elastic telescoping through the spring 10. The sphere 15 at the bottom end of the positioning pin 9 penetrates through the bottom surface of the active connecting member. Both ends of the center pin 8 have rectangular block structures and are respectively inserted into the two guide grooves 11. Through this structure, the center pin 8 can move up and down along the guide grooves 11. An arc-shaped signal detection block 14 is fixed between the rectangular block structures; a proximity switch 13 matching the arc-shaped signal detection block 14 is arranged on one side of the arc-shaped signal detection block 14, and the bottom end of the center pin 8 is an arc-shaped structure arched downward; the passive connecting member 6 is correspondingly arranged below the active connecting member, and its structure is substantially the same as that of the active connecting member 5. Two symmetrically arranged rectangular slots 12 are also formed on the front and rear sides of the passive connecting member 6. The width of the slots 12 is the same as the width of the guide grooves 11. In addition, a relief groove 16 is formed inside the passive connecting member 6 for the arc-shaped structure at the bottom end of the center pin 8 to be embedded.

[0024] In the electric state, due to the elastic action of the spring 10, the center pin 8 moves downward into the passive connecting member 6. Both ends of the center pin 8 are embedded into the slots 12, realizing the relative clamping state between the active connecting member 5 and the passive connecting member 6. When the output shaft of the actuator rotates, it drives the active connecting member 5 to rotate. The active connecting member 5 drives the passive connecting member 6 to rotate through the center pin 8, and the passive connecting member 6 drives the valve core inside the actuated element to rotate, thereby realizing electric operation.

[0025] Combined Figure 6 、 Figure 7 As shown, the rear end of the plug-in handle 7 has a plug block 19 that can be inserted into and penetrate through the slots of the passive connecting member 6. The top surface height of the plug block 19 is higher than the bottom surface height of the active connecting member 5. Symmetric arc-shaped interlocking grooves 20 are formed on both the top and bottom surfaces at the front end of the plug block 19. Both ends of the arc-shaped interlocking grooves 20 penetrate through both side surfaces of the plug block 19. The double-sided grooved structure enables the plug-in handle 7 to be used in both forward and reverse directions. When the plug-in handle 7 rotates, due to the top surface height of the plug block 19 being higher than the bottom surface height of the active connecting member 5, the cylindrical wall of the active connecting member 5 can be embedded into the arc-shaped interlocking grooves 20 and move relative to the arc-shaped interlocking grooves 20. The top and bottom surfaces at the other end of the plug block 19 have downward-sloping ramp surfaces 22. The height of the ramp surfaces is lower than the bottom surface height of the active connecting member 5, preventing the other end of the plug block 19 from being blocked by the bottom end of the active connecting member 5 and unable to rotate. A positioning hole 21 capable of embedding the sphere at the bottom end of the positioning pin is formed in the center of the plug block 19. The position of the handle is positioned through the cooperation between the positioning hole 21 and the sphere. In addition, a limiting rod for restricting the rotation range of the plug-in handle is fixed on the bracket. The limiting rod includes a starting state limiting rod 17 and a final state limiting rod 18.

[0026] When manual operation is required, insert the plug-in handle 7 into the slot 12 of the passive connector 6. The central pin 8 disengages from the passive connector 6 and moves upward into the active connector 5. At this time, the transmission connection between the actuator 2 and the element to be actuated 3 is completely separated. According to the operation requirements, operate clockwise or counterclockwise. The starting-state limit rod 17 and the final-state limit rod 18 limit the plug-in handle 7. The plug-in handle 7 can reach the limited position. After the manual operation is completed, the element to be actuated 3 should be restored to the state before the manual operation. Pull out the handle, and the device is in the electric state. When the plug-in handle 7 is inserted, the central pin 8 drives the arc-shaped signal detection block 14 to rise. The proximity switch 13 can detect the arc-shaped signal detection block 14, thereby determining that manual operation is in progress and actively disconnecting the electric control function. After removing the plug-in handle 7, the manual signal disappears and the electric function is restored, thus realizing the manual-electric interlock function. When not reset to the state before the manual operation, since the barrel wall of the active connector 5 is embedded in the arc-shaped interlock groove 20, the plug-in handle 7 cannot be removed, effectively preventing electric misoperation in the manual state.

[0027] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "joined", "set", "provided", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0028] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. An electric and manual quick switching device for an actuator, comprising an element to be actuated and an actuator connected to the element to be actuated. The element to be actuated and the actuator are connected through an electric and manual quick switching mechanism, and it is characterized in that: The electric and manual quick switching mechanism includes an active connecting piece, a passive connecting piece, a central pin and a plug-in handle. The active connecting piece is fixed to the output shaft of the actuating element. Guide grooves penetrating through the wall thickness are correspondingly formed on both sides of the active connecting piece. The central pin is arranged inside the active connecting piece and elastically expands and contracts through a spring. The central pin can move up and down along the guide grooves. The passive connecting piece is fixed to the valve core of the element to be actuated. The passive connecting piece is correspondingly arranged below the active connecting piece. Slots penetrating through the wall thickness and capable of embedding the two ends of the central pin are formed on both sides of the passive connecting piece. One end of the plug-in handle has a plug block capable of being inserted into and penetrating through the two slots. The plug block can push the central pin to move upward to realize the electric and manual switching; The top surface height of the plug block is higher than the bottom surface height of the active connecting piece. An arc-shaped interlocking groove corresponding to the cylindrical wall of the active connecting piece is formed on the top surface and / or the bottom surface of one end of the plug block. Both ends of the arc-shaped interlocking groove penetrate through the two side surfaces of the plug block. When the plug block rotates, the cylindrical wall of the active connecting piece can be embedded into the arc-shaped interlocking groove and move relative to the arc-shaped interlocking groove. The top surface and / or the bottom surface of the other end of the plug block has a downward-inclined slope surface. The height of the slope surface is lower than the bottom surface height of the active connecting piece; An arc-shaped signal detection block is fixed outside the central pin. The arc-shaped signal detection block is sleeved outside the active connecting piece. A proximity switch corresponding to the arc-shaped signal detection block is arranged on one side of the arc-shaped signal detection block; A positioning pin is arranged inside the central pin. The spring is sleeved outside the positioning pin. The central pin drives the positioning pin to elastically expand and contract through the spring. The bottom end of the positioning pin penetrates through the bottom surface of the active connecting piece. A positioning hole capable of embedding the bottom end of the positioning pin is formed on the plug block; The element to be actuated and the actuating mechanism are fixed through a bracket.

2. The electric and manual quick switching device for an actuator according to claim 1, characterized in that: A limiting rod for restricting the rotation range of the plug-in handle is fixed on the bracket.

3. The electric and manual quick switching device for an actuator according to claim 2, characterized in that: The limiting rod includes a starting-state limiting rod and an end-state limiting rod.

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