Manual anti-misoperation device

Abstract

The present invention discloses a manual misoperation prevention device, including a panel assembly, a main transmission assembly, an electric control assembly, a locking assembly, and a locking subassembly, wherein: the panel assembly is used to display the operation status and provide an operation interface, so as to facilitate further selection of electric or manual operation mode, and provide a locking function to ensure that the device is in a predetermined safe state; the main transmission assembly is used to convert manual operation into mechanical movement, and drive the closing and opening actions of the circuit breaker or the phase-changing switch; the electric control assembly is used to monitor the operation status and control the start and stop of the motor; the locking assembly is used to cooperate with the main transmission assembly to fix the isolating switch or the grounding switch in the closing position; the locking subassembly is used to cooperate with the main transmission assembly to fix the isolating switch or the grounding switch in the opening position. The present invention overcomes the difficulty of direct mechanical interlocking between large-scale power equipment, and significantly reduces the safety risks that may be caused by relying on a single electrical interlock.

Description

Technical Field

[0001] The invention relates to the technical field of five-protection of high-voltage switchgear, and in particular to a manual misoperation prevention device. Background Art

[0002] Circuit breakers, disconnectors, and earthing switches are generally important switchgear in power systems, and play a vital role in ensuring personal and equipment safety. Disconnectors and earthing switches are maintenance switches, and they must be operated according to certain procedures, especially they must be interlocked with circuit breakers.

[0003] At present, circuit breakers, disconnectors and earthing switches are widely used in my country, but different equipment models are selected according to different scenarios and functions. Different models and voltage levels usually lead to different structures and different matching interlocks. In addition, KYN28A-12 high-voltage switchgear is becoming more and more common, and the technology is very mature. This type of switchgear mainly relies on its own mechanical interlocking to achieve the "five protection" function, namely, preventing accidental opening and closing of circuit breakers, preventing accidental closing of switches with earthing knives, preventing accidental closing of earthing knives with power on, preventing accidental entry into live intervals, and preventing accidental pulling and closing of isolating trolleys with load. The five-protection interlocking of medium-voltage switchgear usually adopts mechanical transmission to achieve interlocking, which has strong reliability, but the transmission structure between parts is relatively complex and has high requirements for assembly process.

[0004] At the same time, in pumped-storage power generation systems, circuit breakers, disconnectors, and grounding switches are all large in size and are independent products, which is not conducive to achieving interlocking in mechanical transmission. Relying solely on electrical interlocking to protect the safety of people and equipment is prone to major safety accidents.

[0005] To this end, the present application proposes a manual anti-misoperation device with a simple transmission structure to solve the above technical problems. Summary of the invention

[0006] The main purpose of the present invention is to provide a manual anti-misoperation device to solve the problems mentioned in the above background technology.

[0007] In order to solve the above technical problems, the present invention provides a manual anti-misoperation device, which is installed at the manual operation position of the disconnector and the earthing switch, and includes an aluminum alloy frame and a panel assembly, a main transmission assembly, an electric control assembly, a locking assembly, and a lock subassembly that are arranged on the aluminum alloy frame and connected to each other, wherein:

[0008] A guide cover is provided on the top of the aluminum alloy frame;

[0009] The panel assembly is used to display the operating status and provide an operating interface to facilitate further selection of electric or manual operating modes, and provides a locking function to ensure that the device is in a predetermined safe state;

[0010] The main transmission assembly is used to convert manual operation into mechanical movement and drive the closing and opening actions of the circuit breaker or phase-changing switch; the main transmission assembly includes a manual operating shaft, a harmonic reducer arranged on the manual operating shaft, and a position-opening screw nut and a position-closing screw nut arranged in the middle of the manual operating shaft;

[0011] The electric control assembly is used to monitor the operating status and control the start and stop of the motor, and to assist the operation by timely releasing the brake coil during manual operation;

[0012] The locking assembly is used to cooperate with the main transmission assembly to lock the disconnector or the earthing switch in the closed position to prevent unexpected opening operation;

[0013] The locking subassembly is used to cooperate with the main transmission assembly to lock the isolating switch or the earthing switch in the open position to prevent unexpected closing operation.

[0014] Further, the panel assembly mainly comprises a panel body, an operating lock body, a locking lock body, a locking body, a knob and a turntable on the other side that are rotatably arranged on the same side, and the operating lock body, the locking lock body, the locking body and the knob are all arranged on the panel body, and the knob passes through the panel body and is provided with a clip spring;

[0015] The operating lock body, the locking lock body and the locking separate lock body are respectively provided with an operating lock tongue, a closing lock tongue and a separate lock tongue, and the edge of the rotating disk is provided with a groove for coordinating and positioning the operating lock tongue, the separate lock tongue and the closing lock tongue;

[0016] The operating lock body is used to switch between electric mode and manual mode, and serves as the master key for switch maintenance. The closing lock body is used to limit the switch to the closing position and limit electric and manual operation of the switch. The opening lock body is used to limit the switch to the opening position and limit electric and manual operation of the switch.

[0017] In the limited state of the electric and manual operation switch, the knob is used to connect and drive the turntable to rotate, and control the switching of electric, manual, locking and locking modes;

[0018] After the groove of the turntable rotates to a specified angle position, the operating lock body, the split lock body or the closed lock body rotates accordingly, and the operating lock tongue, the split lock tongue or the closed lock tongue is stuck into the groove of the turntable to limit the rotation of the turntable;

[0019] In manual mode, the circular hole on the turntable is concentric with the manual operating shaft, and the turntable is used to drive the manual operating shaft to rotate through an external crank to realize manual closing and opening switching.

[0020] Furthermore, the electric control assembly includes a micro switch and a proximity switch. The micro switch is installed on the aluminum alloy frame in an open and closed manner. The proximity switch is placed horizontally and vertically upward for sensing.

[0021] When the lock body is rotated, the lock tongue is operated to rotate and switch the micro switch, and the normally closed and normally open states of the micro switch are switched, thereby controlling the on and off of the motor circuit to complete the automatic and manual switching;

[0022] In manual mode, insert the manual crank handle. When the proximity switch senses the insertion of the handle, it provides a signal to the brake coil of the motor. The brake coil is energized to release the brake in the closed or open position, so that the handle can be easily turned.

[0023] Furthermore, the locking assembly includes a support pin, a lever, a pin rod, a closing rod, and a closing reset spring. One end of the closing rod is milled flat and has a hole, which is used for installation and cooperation with the lever through the pin rod; the other end of the closing rod is processed into a spherical shape, which is used to insert the closing lock tongue; a boss is provided in the middle of the closing rod, which is used for pushing the closing reset spring; a thread is provided in the middle of the closing rod, which is used for installing the closing screw nut;

[0024] In the closed state, the locking body is operated to lock the switch;

[0025] In the open state, the closing rod is inserted into the closing lock tongue under the action of the closing reset spring to limit the rotation of the closing lock.

[0026] Furthermore, the lock subassembly includes a linear bearing, a branch rod, a movable screw nut, and a position-dividing reset spring. One end of the branch rod is inserted into the linear bearing, and the other end of the branch rod is processed into a spherical shape for inserting the position-dividing lock tongue. A boss is provided in the middle of the branch rod for pushing the position-dividing reset spring. A thread is provided in the middle of the branch rod for installing the movable screw nut.

[0027] In the open state, the lock body is operated to lock the vehicle;

[0028] In the closed state, the split rod is inserted into the split lock tongue under the action of the split reset spring to limit the rotation of the split lock body.

[0029] Furthermore, a slider is installed on the manual operating shaft. When closing or opening the switch, the manual operating shaft rotates to drive the slider to slide linearly, and the slider drives the locking component or the locking component to move to realize the position state switching of the switch.

[0030] Furthermore, the closed-position lead screw nut and the open-position lead screw nut are used to prevent over-position of the motor transmission.

[0031] Furthermore, an external threaded bearing is installed on the upper end of the slider, and the external threaded bearing is inserted into the guide groove of the guide cover and slides in a straight line. An oiling hole is provided on the upper end of the slider. The slider adopts a seven-shaped structure, and a through hole is opened on the upper part of the slider for the passage of the split rod.

[0032] Furthermore, a polygonal boss is provided on one side of the turntable for cooperating with a knob, and a plurality of spherical grooves are provided on the other side of the turntable for cooperating with a positioning and installing ball screw. A hand-operated circular hole and a locking groove are provided on the turntable.

[0033] Furthermore, the operating lock tongue, the split lock tongue and the closed lock tongue are all open square and chamfered on both sides.

[0034] Furthermore, one end of the hand-operated shaft is processed into a spline shape for cooperating with the motor drive shaft, and the other end of the hand-operated shaft is processed into a polygonal groove for cooperating with the manual crank.

[0035] Furthermore, at least two boss-type grooves are processed on the guide cover, and a refueling hole is provided in the middle of the groove.

[0036] The beneficial effects of the present invention are embodied in:

[0037] 1. Compared with the prior art, the present invention achieves logical locking in the operation process by integrating a dual-key system structure of an operating key and a locking key, and adopts a connection method of switching different operation modes by rotating a turntable, thereby greatly enhancing the safety and accuracy of manual operation.

[0038] 2. The present invention introduces a screw nut mechanism to perform overshoot protection operations and utilizes its self-locking characteristics in mechanical transmission to successfully limit excessive movement during operation, thereby protecting the equipment from damage due to improper stress and further improving the delicacy and control accuracy of the operation.

[0039] 3. The present invention realizes status monitoring through the coordinated connection of the closing rod and the opening rod with a specific locking tongue, and the smooth sliding of the slider along the manual operating shaft, thereby ensuring the reliable locking of the switch device in the closing or opening state, and effectively preventing system failures or safety accidents that may be caused by misoperation.

[0040] 4. Compared with the prior art, the present invention achieves precise mechanical interlocking control of circuit breakers, disconnectors and earthing switches in pumped storage power generation systems through the integrated mechanical program lock design and the direct linkage between the operating key and the status locking mechanism. It not only overcomes the difficulty of direct mechanical interlocking between large-scale power equipment, but also significantly reduces the safety risks that may be caused by relying on a single electrical interlock through enhanced operational safety, ensuring the high reliability of power facility operation and personnel safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0042] Figure 1 It is an overall three-dimensional schematic diagram of the present invention;

[0043] Figure 2 It is a three-dimensional schematic diagram of the internal structure of the present invention;

[0044] Figure 3 It is a three-dimensional schematic diagram of the panel assembly structure of the present invention, wherein: (a) is an outer side perspective, and (b) is an inner side perspective;

[0045] Figure 4 It is a front perspective schematic diagram of the guide cover structure of the present invention;

[0046] Figure 5 Schematic diagram of the turntable structure of the present invention, wherein: (a) is a front view, (b) is a back view;

[0047] Figure 6 It is a three-dimensional schematic diagram of the locking structure of the present invention;

[0048] Figure 7 It is a three-dimensional schematic diagram of the lock split structure of the present invention;

[0049] Figure 8 It is a plan schematic diagram of the mode conversion structure of the present invention, wherein: (a) is a plan schematic diagram in the automatic mode state, (b) is a plan schematic diagram in the manual mode state, (c) is a plan schematic diagram in the locking mode state, and (d) is a plan schematic diagram in the locking mode state.

[0050] In the figure:

[0051] 1. Operation lock tongue; 2. Turntable; 3. Split rod; 4. Split lock tongue; 5. Micro switch; 6. Closed lock tongue; 7. Closed reset spring; 8. Closed rod; 9. Pin rod; 10. Push rod; 11. Support pin; 12. Proximity switch; 13. Harmonic reducer; 14. Hand-operated shaft; 15. Split screw nut; 16. Linear bearing; 17. Movable screw nut; 18. External threaded bearing; 19. Closed screw nut; 20. Slider; 21. Panel body; 22. Split lock body; 23. Knob; 24. Closed lock body; 25. Operation lock body; 26. Circlip; 27. Guide cover; 28. Ball screw; 29. ​​Split reset spring. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0053] In the first embodiment, see Figures 1 to 8 .

[0054] The present invention provides a manual misoperation prevention device, which is applicable to circuit breakers and phase-changing switch equipment in a pumped storage generator system and is installed at the manual operation position of an isolating switch and a grounding switch. Figures 2 to 7 As shown, the main core components inside are integrated and installed in the aluminum frame (reference Figure 1 ), including an aluminum alloy frame and a panel assembly, a main transmission assembly, an electric control assembly, a locking assembly, and a lock subassembly arranged on the aluminum alloy frame and connected to each other, wherein:

[0055] A guide cover 27 is provided on the top of the aluminum alloy frame. Figure 4 , the guide cover 27 is processed with at least two boss-type grooves, and a refueling hole is provided in the middle of the groove;

[0056] The panel assembly is used to display the operating status and provide an operating interface to facilitate further selection of electric or manual operation modes, and provides a locking function to ensure that the equipment is in a predetermined safe state;

[0057] Main transmission component, used to convert manual operation into mechanical movement and drive the closing and opening actions of the circuit breaker or phase-changing switch;

[0058] The electronic control component is used to monitor the operating status and control the start and stop of the motor, and to assist the operation by timely releasing the brake coil during manual operation;

[0059] The locking assembly is used to cooperate with the main transmission assembly to lock the disconnector or earthing switch in the closed position to prevent unexpected opening operation;

[0060] The lock subassembly is used to cooperate with the main transmission assembly to lock the disconnector or earthing switch in the open position to prevent unexpected closing operation.

[0061] Furthermore, the main transmission assembly includes a manual shaft 14, a harmonic reducer 13 arranged on the manual shaft 14, a slider 20, a split screw nut 15 and a combined screw nut 19 arranged in the middle of the manual shaft 14, wherein:

[0062] One end of the manual shaft 14 is processed into a spline type for coaxial connection with the motor drive shaft, without the need for connector locking, and the other end of the manual shaft 14 is processed into a polygonal groove for matching with the manual crank, which is generally a hexagonal countersunk groove for easy insertion of the manual crank;

[0063] When the switch is closed or opened, the manual operating shaft 14 rotates to drive the slider 20 to slide back and forth in a straight line along the direction of the manual operating shaft 14. The slider 20 drives the locking component or the locking component to move to realize the position state of the switch. At this time, the screw nut plays an over-travel role in the closing and opening positions.

[0064] Furthermore, panel components such as Figure 3 As shown, it mainly comprises a panel body 21, an operating lock body 25, a locking lock body 24, a locking separate lock body 22, a knob 23 and a turntable 2 on the other side, which are rotatably arranged on the same side, and the operating lock body 25, the locking lock body 24, the locking separate lock body 22 and the knob 23 are all arranged on the panel body 21, and the knob 23 passes through the panel body 21 and is provided with a retaining spring 26, and the knob 23 is provided with a hexagonal groove to cooperate with the hexagonal boss on the turntable 2, and when the knob 23 is rotated, the turntable 2 can be driven to rotate together;

[0065] The operating lock body 25, the locking lock body 24 and the locking separation lock body 22 are respectively provided with an operating lock tongue 1, a closing lock tongue 6 and a separation lock tongue 4, and as shown in FIG. Figure 5 As shown, a polygonal boss is provided on one side of the turntable 2 for cooperating with the knob 23. A hand-operated circular hole and a lock groove are provided on the turntable 2. Eight spherical grooves are provided on the back panel of the turntable 2 for cooperating with the positioning and installation of the ball screw 28. Grooves are provided on the circumferential edge of the turntable 2 for cooperating with the positioning operation of the lock tongue 1, the open position lock tongue 4 and the closed position lock tongue 6. When the turntable 2 rotates, four positions are set, namely the electric position, the manual position, the lock open position and the lock closed position.

[0066] It can be further explained at this point that the operating lock tongue 1, the split lock tongue 4 and the closed lock tongue 6 are all open square in shape and chamfered on both sides.

[0067] Specifically, two ball screws 28 are set behind the turntable 2. The ball screws 28 have balls on them. A spring is installed at the lower end of the balls to support the balls. The ball screws 28 are installed on an aluminum frame. When the turntable 2 is not in the four states, the rotating turntable 2 has a certain damping. When the turntable 2 reaches a certain state, the balls fall into the grooves and are positioned and locked by the ball screws 28 to achieve position locking.

[0068] Therefore, when the turntable 2 is rotated to the specified position mode, the key is turned, and by rotating the corresponding lock body structure (the groove of the turntable 2 is rotated to the specified angle position, the operating lock body 25 or the locking lock body 24 or the locking split lock body 22 is rotated accordingly), the corresponding lock tongue rotates to the groove on the turntable 2 and is stuck in the groove of the turntable 2 (the operating lock tongue 1, the split lock tongue 4 or the closed lock tongue 6 is stuck in the groove of the turntable 2), thereby limiting the rotation of the turntable 2 and completing the position locking.

[0069] Specifically, the operating lock body 25 is used to switch between the electric mode and the manual mode, and serves as a master key for switch maintenance. The closing lock body 24 is used to limit the switch to the closing position and limit the electric and manual operation of the switch. The opening lock body 22 is used to limit the switch to the opening position and limit the electric and manual operation of the switch.

[0070] In the limited state of the electric and manual operation switch, the knob 23 is used to connect the turntable 2 to rotate and control the switching of the electric, manual, locking and locking modes;

[0071] In manual mode, the turntable 2 turns to the manual position, and the round hole on the turntable 2 is concentric with the hand-operated shaft 14. At this time, the turntable 2 can be inserted with a manual crank to drive the hand-operated shaft 14 to rotate through the external crank to realize manual closing and opening switching. When the proximity switch 12 senses the insertion of the crank, the motor's brake function will be released. At this time, the crank can be easily turned to perform manual closing and opening operations.

[0072] Furthermore, the electric control assembly includes a micro switch 5 and a proximity switch 12, wherein:

[0073] The micro switch 5 is installed on the aluminum alloy frame with one open and one closed, and the normally closed and normally open switching of the micro switch 5 controls the on and off of the motor circuit to complete the automatic and manual switching;

[0074] The proximity switch 12 adopts horizontal vertical sensing;

[0075] In manual mode, insert the manual crank handle, and when the proximity switch 12 senses the insertion of the handle, it provides a signal to the brake coil of the motor. The brake coil is energized to release the brake in the closed or open position, so that the handle can be easily turned.

[0076] At the same time, in a specific embodiment, since a micro switch 5 with an open and a closed contact is installed next to the operating lock body 25, when the key is rotated 90 degrees clockwise, the operating lock tongue 1 switches the auxiliary contact, at this time disconnecting the control signal of the motor circuit, making it impossible to electrically close and open the switch.

[0077] It can be explained here that, since the locking of each position of the switch must be consistent with the actual state of the switch, it is necessary to further establish a locking assembly and a locking subassembly.

[0078] Specifically, refer to Figure 6 The locking assembly includes a support pin 11, a lever 10, a pin rod 9, a closing rod 8 and a closing reset spring 7. One end of the closing rod 8 is milled flat and a hole is opened for installation and cooperation with the lever 10 through the pin rod 9; the other end of the closing rod 8 is processed into a spherical shape for inserting the closing lock tongue 6. A boss is provided in the middle of the closing rod 8 for pushing the closing reset spring 7. A thread is provided in the middle of the closing rod 8 for installing the closing screw nut 19.

[0079] When the switch moves to the closing position, the lock body 24 can be operated to lock the switch in the closed state. At this time, the slider 20 pushes the lever 10 to rotate, thereby pulling the closing rod 8 to slide out of the lock groove of the closing lock tongue 6. At this time, the lock body 24 can be operated to complete the locking;

[0080] When the switch is in the open state, the closing rod 8 is inserted into the closing lock tongue 6 under the action of the closing reset spring 7 to limit the rotation of the locking body 24.

[0081] Specifically, refer to Figure 7 The lock subassembly includes a linear bearing 16, a branch rod 3, a movable screw nut 17, and a position reset spring 29. One end of the branch rod 3 is inserted into the linear bearing 16, and the other end of the branch rod 3 is processed into a spherical shape for inserting the position lock tongue 4. A boss is provided in the middle of the branch rod 3 for pushing the position reset spring 29. A thread is provided in the middle of the branch rod 3 for installing the movable screw nut 17.

[0082] When the switch moves to the open position, the lock body 22 can be operated to lock the switch in the open state. At this time, the slider 20 pushes the movable screw nut 17 and drives the split rod 3 to slide out of the lock groove of the split lock tongue 4. At this time, the lock body 22 can be operated to complete the lock;

[0083] When the switch is in the closed state, the split rod 3 is inserted into the split lock tongue 4 under the action of the split reset spring 29 to limit the rotation of the split lock body 22 .

[0084] It can be further explained that the closing screw nut 19 and the opening screw nut 15 provided on the rod can be used to prevent the motor from over-driving.

[0085] Furthermore, an external threaded bearing 18 is installed on the upper end of the slider 20. When the switch is closed or opened, the external threaded bearing 18 is inserted into the guide groove of the guide cover 27 and slides in a straight line. An oiling hole is provided on the upper end of the slider 20. The slider 20 adopts a seven-shaped structure, and a through hole is opened on the upper part of the slider 20 for the passage of the split rod 3.

[0086] It can also be further explained that, since both the slider 20 and the guide cover 27 are provided with oiling holes, grease can be added and stored to the thread of the hand-operated shaft 14 through the circular hole, and during normal operation, the oiling hole of the guide cover 27 is sealed with an internal angle bolt to prevent dust from entering.

[0087] In summary, the device structure has the following advantages:

[0088] (1) The operation mode adopts the operation key and the locking key. Through the dual-key system structure integrating the operation key and the locking key, the connection mode of the turntable 2 rotating to switch different operation modes is adopted to realize the program lock and achieve the logical lock in the operation process, which greatly enhances the safety and accuracy of manual operation;

[0089] (2) The rotation of the turntable 2 is used to switch between different modes. The cooperation between the groove of the turntable 2 and the lock tongue achieves the purpose of quickly and accurately switching between different operating modes, which simplifies the overall operation process and improves work efficiency while ensuring operational safety and avoiding the possibility of misoperation.

[0090] (3) The combined rod 8 and the branch rod 3 are connected with a specific locking tongue to achieve locking of the state position;

[0091] (4) The switch state position is determined by sliding the slider 20 along the manual operating shaft 14, which enables state monitoring and ensures the reliability of locking the switch device in the closed or open state;

[0092] (5) The screw nut is used to prevent overshoot in the open and closed positions. Its self-locking characteristics in mechanical transmission are utilized to successfully limit excessive movement during operation, which not only protects the equipment from damage caused by improper stress, but also further improves the delicacy and control accuracy of the operation.

[0093] Compared with the existing technology, through the integrated mechanical program lock design and the direct linkage between the operating key and the status locking mechanism, precise mechanical interlocking control of circuit breakers, disconnectors and earthing switches in the pumped storage power generation system is achieved. It not only overcomes the difficulty of direct mechanical interlocking between large-scale power equipment, but also significantly reduces the safety risks that may be caused by relying on a single electrical interlock through enhanced operational safety, ensuring the high reliability of power facility operation and personnel safety.

[0094] Therefore, in actual use, the device is easy to operate, highly safe, and has a novel structural arrangement, a simple and reliable form, is easy to assemble, and has a wide range of applicability. It is particularly suitable for preventing misoperation of various disconnectors and earthing switches.

[0095] In the second embodiment.

[0096] On the basis of the above first embodiment, the present invention further proposes an operation method for implementing the above manual misoperation prevention device:

[0097] The manual anti-misoperation mechanism has four positions, namely, electric position, manual position, lock position, and lock position. The following is an example of the opening and closing action of the disconnector. The specific operation process is as follows:

[0098] In normal operation, the disconnector is in automatic mode in the closed position. Figure 8 As shown in (a), when maintenance is required, the phase-changing switch receives the remote control command to open the switch, and the isolating switch is electrically operated to the open state. The operator can remove the key of the operating lock body 25 from the wall-mounted program lock, insert it into the corresponding operating lock body 25 in the anti-misoperation mechanism, and rotate it 90 degrees clockwise. At this time, the auxiliary switch in the operating lock body 25 cuts off the motor control circuit, and the electric closing is cut off. At this time, the turntable 2 enters the operable mode.

[0099] To manual mode: Turn knob 23 clockwise. When turntable 2 turns to the manual position, Figure 8 As shown in (b), the ball screw 28 is stuck in the corresponding groove to prevent slipping. At this time, the manual operating hole of the turntable 2 is concentric with the manual operating shaft 14, and a manual crank is inserted into the manual operating hole. After the proximity switch 12 senses the insertion of the manual crank, it provides a signal to the control circuit to energize the motor brake coil. At this time, the manual crank can perform manual closing and opening operations; when the manual crank is pulled out, the motor brake coil loses power and brakes the switch to the closing or opening position.

[0100] To the locking mode: In the locking mode, the switch must be in the closed state before the locking body 24 can be rotated and locked. In the manual mode, insert the manual crank, the motor brake coil is energized to release the brake, and the manual crank is rotated clockwise, and the hand-operated shaft 14 rotates clockwise accordingly. The slider 20 moves linearly under the limit guide of the external threaded bearing 18. When it reaches the closed position, the slider 20 drives the lever 10 to rotate and pull the closing rod 8; at this time, the end of the closing rod 8 is disengaged from the card slot of the closing lock tongue 6, as shown in FIG. Figure 5 As shown, the turntable 2 is rotated to the locked state, and the lock body 24 is rotated counterclockwise, and the closed lock tongue 6 is inserted into the groove of the turntable 2, as shown in FIG. Figure 8 As shown in (c), the turntable 2 cannot be rotated to other modes at this time.

[0101] To the lock-open mode: In the lock-open mode, the switch must be in the open state, and the lock body 22 can be rotated and locked. The lock body 24 is rotated clockwise to release the lock of the turntable 2, and the operating knob 23 puts the turntable 2 in the manual mode. In the manual mode, insert the manual crank, the motor brake coil is energized to release the brake, and the manual crank is rotated counterclockwise. The hand-operated shaft 14 rotates counterclockwise accordingly, and the slider 20 moves linearly under the limit guide of the external threaded bearing 18. When it reaches the open position, the slider 20 drives the movable screw nut 17 and pulls the split rod 3; at this time, the end of the split rod 3 is disengaged from the slot of the split lock tongue 4, as shown in FIG. Figure 6As shown, the rotating disk 2 is rotated to the locked state, and the locking body 22 is rotated counterclockwise, and the locking tongue 4 is inserted into the groove of the rotating disk 2, as shown in FIG. Figure 8 As shown in (d), the turntable 2 cannot be rotated to other modes at this time.

[0102] In addition, it can be further specified that in the locked mode, the split rod 3 is snapped into the slot of the split lock tongue 4 under the action of the split reset spring 29 to prevent the key from rotating; in the locked open mode, the closing rod 8 is snapped into the slot of the closed lock tongue 6 under the action of the closed reset spring 7 to prevent the key from rotating.

[0103] In summary, through the conversion of 4 different modes and the replacement of keys, the device can effectively avoid electric or human misoperation during use.

[0104] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0105] In addition, it should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0106] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that A and B meet at the same time. In addition, in the embodiments of the present invention, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A manual anti-misoperation device, installed at the manual operation position of the isolating switch and the grounding switch, characterized in that: It includes an aluminum alloy frame and a panel assembly, a main transmission assembly, an electric control assembly, a locking assembly, and a lock subassembly that are arranged on the aluminum alloy frame and are connected to each other, wherein: A guide cover (27) is provided on the top of the aluminum alloy frame; The panel assembly is used to display the operating status and provide an operating interface to facilitate further selection of electric or manual operating modes, and provides a locking function to ensure that the device is in a predetermined safe state; The main transmission component is used to convert manual operation into mechanical movement and drive the closing and opening actions of the circuit breaker or the phase-changing switch, and the main transmission component comprises a manual operating shaft (14), a harmonic reducer (13) arranged on the manual operating shaft (14), an opening screw nut (15) and a closing screw nut (19) arranged in the middle of the manual operating shaft (14); The electric control assembly is used to monitor the operating status and control the start and stop of the motor, and to assist the operation by timely releasing the brake coil during manual operation; The locking assembly is used to cooperate with the main transmission assembly to lock the disconnector or the earthing switch in the closed position to prevent unexpected opening operation; The locking subassembly is used to cooperate with the main transmission assembly to lock the disconnector or the earthing switch in the open position to prevent unexpected closing operation; The panel assembly is provided with a locking body (24) and a locking body (22), and the locking body (24) and the locking body (22) are respectively provided with a locking tongue (6) and a locking tongue (4); The locking assembly comprises a support pin (11), a lever (10), a pin rod (9), a closing rod (8), and a closing position return spring (7); one end of the closing rod (8) is milled flat and has a hole, so as to be installed and matched with the lever rod (10) through the pin rod (9); the other end of the closing rod (8) is processed into a spherical shape, so as to be inserted into the closing position lock tongue (6); a boss is provided in the middle of the closing rod (8) for being pushed by the closing position return spring (7); The lock subassembly comprises a linear bearing (16), a branch rod (3), a movable screw nut (17), and a position-dividing return spring (29). One end of the branch rod (3) is inserted into the linear bearing (16). The other end of the branch rod (3) is processed into a spherical shape for inserting into the position-dividing lock tongue (4). A boss is provided in the middle of the branch rod (3) for pushing the position-dividing return spring (29). A thread is provided in the middle of the branch rod (3) for installing the movable screw nut (17).

2. The manual anti-misoperation device according to claim 1, characterized in that: The panel assembly comprises a panel body (21), an operating lock body (25), a locking lock body (24), a locking split lock body (22), a knob (23) and a turntable (2) on the other side, which are rotatably arranged on the same side, and the operating lock body (25), the locking lock body (24), the locking split lock body (22) and the knob (23) are all arranged on the panel body (21), and the knob (23) passes through the panel body (21) and is provided with a retaining spring (26); The operating lock body (25), the locking lock body (24) and the locking split lock body (22) are respectively provided with an operating lock tongue (1), a closing lock tongue (6) and a split lock tongue (4), and the edge of the rotating disk (2) is provided with a groove for cooperating and positioning the operating lock tongue (1), the split lock tongue (4) and the closing lock tongue (6); The operating lock body (25) is used for switching between the electric mode and the manual mode, the closing lock body (24) is used for limiting the switch to the closing position and limiting the electric and manual operation of the switch, and the opening lock body (22) is used for limiting the switch to the opening position and limiting the electric and manual operation of the switch; In the electric and manual operation switch limiting state, the knob (23) is used to connect the turntable (2) to rotate and control the switching of electric, manual, locking and unlocking modes; In manual mode, the circular hole on the rotating disk (2) is concentric with the hand-operated shaft (14), and the rotating disk (2) is used to drive the hand-operated shaft (14) to rotate via an external crank to achieve manual closing and opening switching.

3. The manual anti-misoperation device according to claim 1, characterized in that: The electric control assembly comprises a micro switch (5) and a proximity switch (12); the micro switch (5) is mounted on an aluminum alloy frame in an open and closed manner; and the proximity switch (12) is used to sense the insertion of a crank.

4. The manual anti-misoperation device according to claim 1, characterized in that: A slider (20) is mounted on the hand-operated shaft (14), an externally threaded bearing (18) is mounted on the upper end of the slider (20), the externally threaded bearing (18) is inserted into a guide groove of a guide cover (27), a refueling hole is provided on the upper end of the slider (20), the slider (20) has a seven-shaped structure, and a through hole is provided on the upper portion of the slider (20) for the sub-rod (3) to pass through.

5. The manual anti-misoperation device according to claim 2, characterized in that: The turntable (2) is provided with a polygonal boss on one side for cooperating with the knob (23), and a plurality of spherical grooves are provided on the other side for cooperating with the positioning and mounting ball screws (28). The turntable (2) is provided with a hand-operated circular hole and a locking groove.

6. The manual anti-misoperation device according to claim 2, characterized in that: The operating lock tongue (1), the split lock tongue (4) and the closed lock tongue (6) are all open square and have chamfered edges on both sides.

7. The manual anti-misoperation device according to claim 2, characterized in that: One end of the hand-operated shaft (14) is processed into a spline shape for cooperating with the motor drive shaft, and the other end of the hand-operated shaft (14) is processed into a polygonal groove for cooperating with a hand crank.

8. The manual anti-misoperation device according to claim 1, characterized in that: The guide cover (27) is machined with at least two boss-type grooves, and a refueling hole is provided in the middle of the groove.

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