An intelligent three-station mechanism and its control method

Abstract

The present invention discloses an intelligent three-station mechanism and a control method thereof, comprising a mechanism box and a worm gear reducer, a servo motor, a control driver, and a position signal device disposed within the mechanism box. The position signal device comprises a second mounting plate, a second shaft disposed on the second mounting plate, and an absolute value encoder. The shaft and second shaft of the absolute value encoder are respectively fixedly connected to second synchronous pulleys, the two second synchronous pulleys being kinematically connected via a second synchronous belt, and a driving spur gear being further disposed on the second shaft. The second mounting plate is also provided with a first shaft and an auxiliary switch, the first shaft being sequentially provided with a driven spur gear and a driving intermittent gear, the auxiliary switch shaft being sequentially provided with a driven intermittent gear and an opening / closing indicator, the driving spur gear and the driven spur gear being meshed, and the driving intermittent gear and the driven intermittent gear being meshed. The intelligent three-station mechanism of the present invention has a simpler mechanical structure, and the output angle can be set as required.

Description

Technical Field

[0001] The present invention belongs to the technical field of switch design and manufacturing, and in particular relates to an intelligent three-position mechanism and a control method thereof. Background Art

[0002] In smart grid high-voltage transmission and transformation systems, the operating mechanism serves as the actuator in gas-insulated metal-enclosed switchgear (GIS) equipment. The reliability of its execution of commands issued by the main control equipment and the sensitivity of its response directly determine the success or failure of the GIS equipment's control and protection tasks in the power system. If a fault occurs during operation and is not handled in a timely manner, it may cause serious harm to the power grid. The reliability of its performance is related to the safe operation of the power system.

[0003] Most disconnecting / earthing switches with voltage levels of 252kV and above adopt a three-phase sub-box layout. The three phases are connected to their respective gearboxes using connecting rods, which are called transmission mechanisms. This mechanism drives the three-phase moving contacts to move synchronously. However, under severe overload conditions, the transmission mechanism may fail, causing the three-phase moving contacts to be out of sync, or even one or two phases other than the mechanism phase to fail to move. These occasional situations are extremely hidden and difficult to identify, and can evolve into insulation failures or even accidents.

[0004] The transmission system of a conventional three-station mechanism is complex, and the output angle is limited by the control form, so it can only output a preset fixed angle. The same mechanism can only be adapted to a fixed body, so there are many types of mechanism models and types derived, which brings considerable challenges to the standardized production and manufacturing of the mechanism. Summary of the Invention

[0005] In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides an intelligent three-station mechanism and a control method thereof. The mechanical structure of the intelligent three-station mechanism of the present invention is simpler, and the output angle can be set as required. One mechanism can be suitable for bodies with different requirements, solving the problem that conventional mechanisms are difficult to produce in a standardized manner.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] An intelligent three-position mechanism includes a mechanism box and a worm gear reducer, a servo motor, a control driver and a position signal device arranged in the mechanism box, wherein:

[0008] The position signal device includes a second mounting plate and a second shaft and an absolute value encoder arranged on the second mounting plate, the shaft of the absolute value encoder and the second shaft are respectively fixedly connected with second synchronous pulleys, the two second synchronous pulleys are connected in motion via a second synchronous belt, and the second shaft is further provided with a driving spur gear; the second mounting plate is further provided with a first shaft and an auxiliary switch, the first shaft is sequentially provided with a driven spur gear and a driving intermittent gear, the auxiliary switch shaft is sequentially provided with a driven intermittent gear and an opening and closing indicator, the driving spur gear and the driven spur gear are meshed, and the driving intermittent gear and the driven intermittent gear are meshed;

[0009] Both ends of the worm shaft of the worm gear reducer extend out, one end is the operating end, and the other end is fixedly connected to a first synchronous pulley. Both ends of the worm shaft of the worm gear reducer extend out, one end is connected to the second shaft key, and the other end is connected to the output shaft key;

[0010] The shaft of the servo motor is fixedly connected to another first synchronous pulley, and the two first synchronous pulleys are connected in motion via a first synchronous belt;

[0011] A circular hole is provided on one side wall of the mechanism box, a locking control assembly is provided on the inner side, and a locking plate is provided on the outer side, corresponding to the operating end provided on the worm of the worm gear reducer;

[0012] The control driver is electrically connected to the servo motor.

[0013] As a further improvement of the present invention, the active intermittent gear is in the shape of a disc, and several complete tooth shapes symmetrical about the Y axis are provided at the edge of the disc, and two half tooth grooves are provided on both sides of each complete tooth shape; a circular hole for installing the first shaft is provided at the center of rotation of the disc.

[0014] As a further improvement of the present invention, the driven intermittent gear is in the shape of a disc, and several pairs of complete tooth profiles symmetrical about the Y axis are provided at the edge of the disc, a tooth groove is provided in the middle of each pair of complete tooth profiles, a groove with one tooth missing is provided between every two pairs of complete tooth profiles, and an arc notch is provided at the top of the groove profile; a square hole for installing the auxiliary switch shaft is provided at the center of rotation of the disc.

[0015] As a further improvement of the present invention, the half tooth groove is obtained by intercepting an arc of radius R, and the arc gap is obtained by intercepting an arc R passing through the groove symmetry line and with the center point a at a distance from the center of rotation of the disc as the center of the circle; a is the center distance between the active intermittent gear and the driven intermittent gear.

[0016] As a further improvement of the present invention, when the driving intermittent gear and the driven intermittent gear cooperate, only one complete tooth profile of the driving intermittent gear engages with the tooth groove between a pair of complete tooth profiles of the driven intermittent gear to drive the driven intermittent gear to rotate accordingly; when they are out of engagement, the two form an intermittent motion mechanism.

[0017] As a further improvement of the present invention, a display is further provided near the circular hole on the side wall of the mechanism box; the locking control assembly, the locking plate and the display constitute a visual manual operation device.

[0018] As a further improvement of the present invention, the operating end extending from one end of the worm shaft of the worm gear reducer corresponds to the visual manual operating device, and the handle is connected to the operating end for manual operation.

[0019] As a further improvement of the present invention, the control driver is provided with multiple communication interfaces for position signal sensors with different sources;

[0020] The control driver and servo motor establish a closed-loop control mode for dynamically monitoring load changes, comparing them with the load thresholds of normal working conditions, overload conditions, and severe overload conditions, and displaying early warnings on the display; the absolute encoder establishes communication with the control driver for real-time recording of position information including power failure conditions.

[0021] As a further improvement of the present invention, the control driver is also used to collect and process the servo motor current in real time, and draw a waveform curve, which is compared with the pre-set envelope line. If the collected waveform curve exceeds the envelope line, the result of the load condition of this operation or the result of the position information calculation is reported to the substation control center to provide an operation basis, and at the same time, notification and prompt information are displayed in text and graphic form.

[0022] A control method for an intelligent three-station mechanism, comprising:

[0023] The control driver controls the servo motor to rotate clockwise, and the first synchronous pulley fixedly connected to the servo motor shaft rotates accordingly, and the first synchronous pulley fixedly connected to the worm shaft of the worm gear reducer rotates clockwise through the first synchronous belt; the worm shaft of the worm gear reducer rotates clockwise synchronously, and synchronously, the second shaft connected to one end of the worm shaft with a key and the output shaft connected to the other end with a key rotate clockwise, and output power;

[0024] The second synchronous pulley connected to the second shaft rotates clockwise, and the second synchronous pulley connected to the absolute encoder shaft is driven by the second synchronous belt to rotate clockwise. The absolute encoder rotates synchronously clockwise. The internal code disk of the absolute encoder is encoded according to the corresponding encoding rules, and the generated position is transmitted to the control driver in real time. After the control driver receives the target position information, it controls the servo motor to stop rotating and completes the closing operation.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The main transmission of the present invention adopts a worm gear reducer and directly outputs power from the output shaft on one side of the worm gear, and the other side is connected to the position signal device, so that the mechanism can obtain position signals from different sources than the absolute encoder, and the output angle can be set as required. One mechanism can be applied to entities with different requirements, solving the problem that conventional mechanisms are difficult to produce in a standardized manner. The mechanical structure of the intelligent three-station mechanism of the present invention is simpler, and the output angle can be set as required. One mechanism can be applied to entities with different requirements, solving the problem that conventional mechanisms are difficult to produce in a standardized manner. At the same time, the control driver and display equipped with the mechanism realize clearer and more reliable visual operation, and the online monitoring function during operation enables potential hidden dangers to be dealt with in a timely manner, providing protection for the safe operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the structure of the intelligent three-station mechanism disclosed in an embodiment of the present invention;

[0028] Figure 2 for Figure 1 Right view of;

[0029] Figure 3 Schematic diagram of the structure of the position signal device disclosed in an embodiment of the present invention;

[0030] Figure 4 for Figure 3 Right view of;

[0031] Figure 5 Schematic diagram of the structure of the active intermittent gear disclosed in an embodiment of the present invention;

[0032] Figure 6 Schematic diagram of the structure of the driven intermittent gear disclosed in an embodiment of the present invention;

[0033] Figure 7 Schematic diagram of the structure of the intermittent gear assembly disclosed in an embodiment of the present invention;

[0034] Among them, 1-mechanism box; 2-first mounting plate; 3-worm gear reducer; 4-locking control assembly; 5-servo motor; 6-position signal device; 7-first synchronous belt; 8-first synchronous pulley; 9-control driver; 10-display; 11-output shaft; 12-locking plate; 13-second mounting plate; 14-opening and closing indicator board; 15-second synchronous pulley; 16-second synchronous belt; 17-driving intermittent gear; 18-driving spur gear; 19-driven spur gear; 20-first shaft; 21-second shaft; 22-absolute encoder; 23-auxiliary switch; 24-driven intermittent gear. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0036] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an element centered thereon. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] The present invention provides an intelligent three-position mechanism with a simpler mechanical structure. The main drive uses a worm gear reducer and directly outputs power from an output shaft on one side of the worm gear. The other side is connected to a position signal device, enabling the mechanism to obtain position signals from sources other than the absolute encoder, and the output angle can be set as required. A single mechanism can be adapted to different requirements, resolving the difficulty of standardized production for conventional mechanisms. Furthermore, the mechanism is equipped with a control driver and display, enabling clearer and more reliable visual operation. The online monitoring function during operation enables timely resolution of potential hazards, ensuring the safe operation of the power system.

[0039] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 In one embodiment, the intelligent three-position mechanism disclosed in the present invention includes a mechanism box 1 and a worm gear reducer 3, a servo motor 5, a control driver 9, a display 10 and a position signal device 6 arranged in the mechanism box 1, wherein,

[0040] The position signal device 6 includes a second mounting plate 13, a second shaft 21 disposed on the second mounting plate 13, and an absolute value encoder 22. The shaft of the absolute value encoder 22 and the second shaft 21 are respectively fixedly connected to a second synchronous pulley 15. The two second synchronous pulleys 15 are kinematically connected via a second synchronous belt 16. A driving spur gear 18 is also disposed on the second shaft 21. A first shaft 20 and an auxiliary switch 23 are also disposed on the second mounting plate 13. A driven spur gear 19 and a driving intermittent gear 17 are sequentially disposed on the first shaft 20. A driven intermittent gear 24 and an opening / closing indicator 14 are sequentially disposed on the shaft of the auxiliary switch 23. The driving spur gear 18 and the driven spur gear 19 are meshed, and the driving intermittent gear 17 and the driven intermittent gear 24 are meshed.

[0041] Both ends of the worm shaft of the worm gear reducer 3 extend out, one end is a hexagonal shaft, and the other end is fixedly connected to the first synchronous pulley 8. Both ends of the worm shaft of the worm gear reducer 3 extend out, one end is key-connected to the second shaft 21, and the other end is key-connected to the output shaft 11.

[0042] The shaft of the servo motor 5 is fixedly connected to the first synchronous pulley 8 , and the two first synchronous pulleys 8 are kinematically connected via the first synchronous belt 7 .

[0043] A circular hole is provided on one side wall of the mechanism box 1 , a locking control assembly 4 is provided on the inner side, and a locking plate 12 is provided on the outer side, corresponding to the hexagonal axis provided on the worm of the worm gear reducer 3 .

[0044] A display 10 is also provided near the circular hole on the side wall of the mechanism box 1 .

[0045] Please refer to Figure 5 The active intermittent gear 17 is in the shape of a disc, and a number of complete tooth profiles symmetrical about the Y axis are provided at the edge of the disc. Two half tooth grooves are provided on both sides of each complete tooth profile. Obviously, the half tooth grooves are obtained by intercepting a circular arc with a certain radius R, and a circular hole is provided at the center of rotation of the disc.

[0046] Please refer to Figure 6 The driven intermittent gear 24 is in the shape of a disc, and several pairs of complete tooth profiles symmetrical about the Y axis are provided at the edge of the disc. A tooth groove is provided in the middle of each pair of complete tooth profiles, and a groove with one tooth missing is provided between every two pairs of complete tooth profiles, and an arc notch is provided at the top of the groove profile. Obviously, the arc notch is obtained by intercepting the R arc passing through the groove symmetry line and with a point a at a certain distance a from the center of rotation of the disc as the center of the circle. A square hole is provided at the center of rotation of the disc.

[0047] Please refer to Figure 7After the driving intermittent gear 17 and the driven intermittent gear 24 are matched, only when one complete tooth profile of the driving intermittent gear 17 is engaged with the tooth groove between a pair of complete tooth profiles of the driven intermittent gear 24, the driving intermittent gear 17 rotates to drive the driven intermittent gear 24 to rotate accordingly. When the engagement is withdrawn, although the driving intermittent gear 17 continues to move, the driven intermittent gear 24 is restricted by the R arc notch on it and the R arc on the driving intermittent gear 17 that matches it, and enters an intermittent motion state, achieving the beneficial effect that the driven intermittent gear 24 can intermittently rotate a set angle, and the two constitute an intermittent motion mechanism.

[0048] Furthermore, the control driver 9, display 10, absolute encoder 22, and servo motor 5 establish a closed-loop control mode, dynamically monitor load changes, and compare them with load thresholds for normal operating conditions, overload conditions, and severe overload conditions. The display 10 then issues an early warning. The absolute encoder 22 establishes communication with the control driver 9, recording position information in real time, including in the event of a power outage. This serves as the dynamic position parameter for the motion control of the servo motor 5. The control driver 9 is equipped with communication interfaces for multiple position signal sensors from different sources. The static value logic operation results of each position signal at the final position serve as the sole criterion for determining the position of the device.

[0049] Furthermore, the locking control component 4 arranged at the circular hole on the side wall of the mechanism box 1, the locking plate 12 and the display 10 arranged nearby constitute a visual manual operation device. When the locking plate 12 is opened, the electrical contact conversion of the locking control component 4 is triggered, and the interface of the display 10 immediately jumps to the manual operation interface, displaying whether the device can be manually operated, and if so, the real-time position information during the operation.

[0050] Furthermore, the hexagonal shaft extending from one end of the worm shaft of the worm gear reducer 3 corresponds to the visual manual operation device, and after the hexagonal shaft is inserted into the inner hexagonal hole on the handle, the manual operation connection can be achieved.

[0051] Brief description of the electric operation mechanism of the intelligent three-position mechanism:

[0052] The substation control center or clicks the operation button on the operation interface of the display 10 of the intelligent three-position mechanism to issue an action instruction. Taking the closing operation of the DS side of the intelligent three-position mechanism as an example, the control driver 9 controls the servo motor 5 to rotate clockwise, and the first synchronous pulley 8 fixedly connected to the shaft of the servo motor 5 rotates accordingly, and the first synchronous belt 7 drives the first synchronous pulley 8 fixedly connected to the worm shaft of the worm gear reducer 3 to rotate clockwise. Obviously, the worm shaft of the worm gear reducer 3 rotates synchronously clockwise, and synchronously, the second shaft 21 keyed to one end of the worm shaft and the output shaft 11 keyed to the other end rotate clockwise and output power.

[0053] Furthermore, the second synchronous pulley 15 fixedly connected to the second shaft 21 rotates clockwise accordingly, and the second synchronous pulley 15 fixedly connected to the shaft of the absolute encoder 22 is also driven to rotate clockwise through the second synchronous belt 16. Obviously, the absolute encoder 22 rotates synchronously clockwise. At this time, the internal code disk of the absolute encoder 22 is encoded according to the corresponding encoding rules, and the generated position is transmitted to the control driver 9 in real time until the control driver 9 receives the target position information, controls the servo motor 5 to stop rotating, and completes the closing operation.

[0054] Furthermore, the driving spur gear 18 provided on the second shaft 21 rotates clockwise, driving the driven spur gear 19 provided on the first shaft 20 and meshing therewith to rotate counterclockwise, and then the driving intermittent gear 17 provided on the first shaft 20 also rotates counterclockwise. In this process, a complete tooth profile of the driving intermittent gear 17 first enters the tooth groove of the driven intermittent gear 24 matched therewith, and the two enter the gear meshing stage, driving the driven intermittent gear 24 to rotate clockwise. Before exiting the gear meshing, the R arc on the driving intermittent gear 17 gradually enters the tooth groove of the driven intermittent gear 24. The R arc notch of the wheel 24 is notched until it exits the gear meshing. The driven intermittent gear 24 is restricted by the R arc notch on it and the R arc that matches it on the active intermittent gear 17. At this time, although the active intermittent gear 17 moves, the driven intermittent gear 24 is stationary and enters the intermittent motion state. As the active intermittent gear 17 continues to rotate and rotates through a preset angle θ2, the two successively experience the stages of entering and exiting gear meshing for the second time until they stop rotating. Obviously, after two intermittent actions, the driven intermittent gear 24 finally rotates through a preset angle.

[0055] Furthermore, during the two intermittent clockwise rotations of the driven intermittent gear 24, the shaft of the auxiliary switch 23 is driven to rotate clockwise by a predetermined angle. Consequently, the on / off indicator 14 provided on the shaft of the auxiliary switch 23 rotates clockwise by a predetermined angle. At a certain moment before the rotation is about to end, the electrical contacts within the auxiliary switch 23 switch, and the switched signal is transmitted to the control driver 9. The control driver 9 then receives position information from a different source within the mechanism than that from the absolute encoder 22. Clearly, the position of the on / off indicator 14 helps humans observe the current position of the mechanism.

[0056] Preferably, the control driver 9 and the servo motor 5 establish a closed-loop control mode to achieve precise closed-loop motion control of the servo motor 5. The multi-channel different source position signal sensor communication interface set up by the control driver 9 can receive sensor signals set at key parts of the transmission system inside or outside the mechanism, and after logical operation, the operation result is used as the only criterion for the position of the equipment. At the same time, the control driver 9 also collects and processes the current of the servo motor 5 in real time, draws a waveform curve, and compares it with the pre-set envelope. If the collected waveform curve exceeds the envelope, the result of the load condition of this operation or the position information calculation result is reported to the substation control center to provide an operational basis. At the same time, it notifies the operation and maintenance personnel in text and graphic form, prompting them to carry out inspection and maintenance under appropriate circumstances and eliminate potential hidden dangers in a timely manner.

[0057] The opening operation process of the DS side of the intelligent three-position mechanism is the same as the closing operation process except that the direction of rotation is reversed.

[0058] The closing and opening operations on the ES side of the intelligent three-position mechanism are mirrored to those on the DS side.

[0059] Furthermore, the operation buttons on the operation interface of the intelligent three-station mechanism display 10 have an anti-misoperation function. Specifically, the interlocking conditions and locking signals input by the corresponding I / O interface of the control driver 9 are logically operated according to preset rules, and the control driver 9 transmits the results to the display 10 and assigns the operation buttons on the operation interface. The logically false buttons are displayed in gray and cannot be operated to avoid misoperation.

[0060] Furthermore, several interfaces of the display 10 also include parameter settings, operating instructions, motion process images, characteristic curves, warning information, etc., to achieve visual operation.

[0061] Brief description of the manual operation mechanism of the intelligent three-position mechanism:

[0062] When manual operation is required in an emergency, open the locking plate 12 at the circular hole on the side wall of the mechanism box 1, triggering the electrical contact conversion of the locking control component 4 set inside the circular hole on the side wall of the mechanism box 1. At this time, the display 10 interface immediately jumps to the manual operation interface. Through the logical operation of the interlocking conditions and locking signals input by the corresponding I / O interface of the control driver 9, the control driver 9 transmits the result to the display 10. Then, the manual operation interface will display text information on whether the device can be manually operated. If the interlocking conditions are not met, an alarm will be issued. If the interlocking conditions are met, insert the handle according to the prompt information for manual operation. The real-time position information of the mechanism is also displayed during the operation.

[0063] Furthermore, after the control driver and servo motor are coordinated, the control driver can not only realize closed-loop motion control of the servo motor, but also realize real-time collection and processing of the servo motor current, and draw a waveform curve, which is compared with the pre-set envelope line. If the collected waveform curve exceeds the envelope line, the result of the load condition of this operation will be reported to the substation control center to provide an operational basis. At the same time, the operation and maintenance personnel will be informed in text and graphic form, prompting them to carry out inspection and maintenance when appropriate, and to eliminate potential hidden dangers in a timely manner.

[0064] Furthermore, the control driver's multi-channel communication interfaces for position signal sensors with different sources can be connected to absolute encoders installed within the mechanism and sensors in key locations of the transmission mechanism, enabling comprehensive monitoring of the transmission system's position information variables. This indirectly ensures the acquisition of the position variable values ​​of the moving contactor's motion. The control driver performs logical operations on the static values ​​of all position variables according to preset judgment rules. If the result is true, it is determined that the movement has reached the expected position. Otherwise, an early warning is issued and the result is reported to the substation control center, providing operational basis. At the same time, the operation and maintenance personnel are informed in text and image form, allowing them to take appropriate and corrective measures to prevent potential hazards.

[0065] Furthermore, the control driver has sufficient I / O interfaces to connect to the necessary status signals of other equipment interlocks and the status signals of the mechanism itself, and perform logical judgment according to the interlocking and locking conditions. The results give the display several operation buttons of the operation interface, and the logically false buttons are displayed in gray and inoperable to avoid misoperation.

[0066] Furthermore, several interfaces of the display also include parameter settings, operating instructions, motion process images, characteristic curves, warning information, etc., to achieve visual operation.

[0067] As can be seen, the intelligent three-position mechanism disclosed in this invention has a simpler mechanical structure, and the output angle can be set as needed. This allows a single mechanism to be used with different bodies, resolving the difficulty of standardized production for conventional mechanisms. Furthermore, the visual operation is clearer and more reliable, and the online monitoring function during operation enables potential hazards to be addressed promptly, safeguarding the safe operation of the power system.

[0068] The above is a detailed introduction to the intelligent three-station mechanism provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in several ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0069] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

[0070] The further detailed description of the invention does not mean that the specific implementation methods of the invention are limited to this. For ordinary technicians in the technical field to which the invention belongs, they can make several simple deductions or substitutions without departing from the concept of the invention, which should be regarded as belonging to the scope of protection of the invention determined by the submitted claims.

Claims

1. An intelligent three-station mechanism, characterized in that: The invention comprises a mechanism box (1), a worm gear reducer (3), a servo motor (5), a control driver (9) and a position signal device (6) arranged in the mechanism box (1), wherein: The position signal device (6) comprises a second mounting plate (13), a second shaft (21) and an absolute value encoder (22) arranged on the second mounting plate (13), the shaft of the absolute value encoder (22) and the second shaft (21) are respectively fixedly connected with a second synchronous pulley (15), the two second synchronous pulleys (15) are connected in motion via a second synchronous belt (16), and a driving spur gear (18) is further arranged on the second shaft (21); a first shaft (20) and an auxiliary switch (23) are further arranged on the second mounting plate (13), a driven spur gear (19) and a driving intermittent gear (17) are sequentially arranged on the first shaft (20), a driven intermittent gear (24) and an opening and closing indicator (14) are sequentially arranged on the shaft of the auxiliary switch (23), the driving spur gear (18) and the driven spur gear (19) are meshed, and the driving intermittent gear (17) and the driven intermittent gear (24) are meshed; Both ends of the worm shaft of the worm gear reducer (3) extend out, one end is an operating end, and the other end is fixedly connected to a first synchronous pulley (8); both ends of the worm shaft of the worm gear reducer (3) extend out, one end is key-connected to the second shaft (21), and the other end is key-connected to the output shaft (11); The shaft of the servo motor (5) is fixedly connected to another first synchronous pulley (8), and the two first synchronous pulleys (8) are connected in motion via a first synchronous belt (7); A circular hole is provided on one side wall of the mechanism box (1), a locking control assembly (4) is provided on the inner side, and a locking plate (12) is provided on the outer side, corresponding to the operating end provided on the worm of the worm gear reducer (3); The control driver (9) is electrically connected to the servo motor (5); The active intermittent gear (17) is in the shape of a disk, and a plurality of complete tooth profiles symmetrical about the Y axis are provided at the edge of the disk, and two half tooth grooves are provided on both sides of each complete tooth profile; a circular hole for mounting the first shaft (20) is provided at the rotation center of the disk; The driven intermittent gear (24) is in the shape of a disk, and a plurality of pairs of complete tooth profiles symmetrical about the Y axis are provided at the edge of the disk, a tooth groove is provided in the middle of each pair of complete tooth profiles, a groove with one tooth missing is provided between every two pairs of complete tooth profiles, and a circular arc notch is provided at the top of the groove profile; a square hole for mounting the shaft of the auxiliary switch (23) is provided at the rotation center of the disk; The half tooth groove is obtained by intercepting a circular arc of radius R, and the circular arc gap is obtained by intercepting an arc R passing through the symmetry line of the groove and having a point a distance from the rotation center of the disc as the circle center; a is the center distance between the active intermittent gear (17) and the driven intermittent gear (24); When the active intermittent gear (17) and the driven intermittent gear (24) are matched, only one complete tooth profile of the active intermittent gear (17) is engaged with the tooth groove between a pair of complete tooth profiles of the driven intermittent gear (24) to drive the driven intermittent gear (24) to rotate accordingly; when the engagement is withdrawn, the two constitute an intermittent motion mechanism.

2. The intelligent three-station mechanism according to claim 1, characterized in that: A display (10) is also provided near the circular hole on the side wall of the mechanism box (1); the locking control component (4), the locking plate (12) and the display (10) form a visual manual operation device.

3. The intelligent three-station mechanism according to claim 2, characterized in that: An operating end extending from one end of the worm shaft of the worm gear reducer (3) corresponds to a visual manual operating device, and a handle is connected to the operating end for manual operation.

4. The intelligent three-station mechanism according to claim 1, characterized in that: The control driver (9) is provided with multiple communication interfaces for different source position signal sensors; A closed-loop control mode is established between the control driver (9) and the servo motor (5) for dynamically monitoring load changes and comparing the load thresholds of normal working conditions, overload working conditions, and severe overload working conditions, and providing an early warning display via a display (10); an absolute value encoder (22) establishes communication with the control driver (9) for real-time recording of position information including in the event of a power failure.

5. The intelligent three-station mechanism according to claim 1, characterized in that: The control driver (9) is also used to collect and process the current of the servo motor (5) in real time, and draw a waveform curve, and compare it with the pre-set envelope line. If the collected waveform curve exceeds the envelope line, the result of the load condition of this operation or the result of the position information calculation is reported to the substation control center to provide an operation basis, and at the same time, notification and prompt information are displayed in text and graphic forms.

6. A control method for an intelligent three-station mechanism according to any one of claims 1 to 5, characterized in that: include: The control driver (9) controls the servo motor (5) to rotate clockwise, and the first synchronous pulley (8) fixedly connected to the shaft of the servo motor (5) rotates accordingly, and the first synchronous pulley (8) fixedly connected to the worm shaft of the worm gear reducer (3) is driven to rotate clockwise through the first synchronous belt (7); the worm shaft of the worm gear reducer (3) rotates clockwise synchronously; the second shaft (21) connected to one end of the worm shaft with a key and the output shaft (11) connected to the other end with a key rotates clockwise, and outputs power; The second synchronous pulley (15) fixedly connected to the second shaft (21) rotates clockwise accordingly, and the second synchronous pulley (15) fixedly connected to the shaft of the absolute value encoder (22) is driven by the second synchronous belt (16) to also rotate clockwise; the absolute value encoder (22) rotates synchronously clockwise; the internal code disk of the absolute value encoder (22) encodes according to the corresponding encoding rules, and the generated position is transmitted to the control driver (9) in real time until the control driver (9) receives the target position information, and controls the servo motor (5) to stop rotating, completing the closing operation.

Images