A high pressure interlock device electrical box

Abstract

This invention discloses an electrical box for a high-voltage interlocking device. The box contains a control panel parallel to the door. The front of the panel is equipped with a primary lock, a secondary lock, and an illuminated push-button switch. The back has two sets of horizontally sliding sliders. The primary lock, linked to the first slider, triggers a microswitch, which in turn activates an external high-voltage grounding switch. The illuminated push-button switch visually indicates the grounding switch's operating status. The secondary lock, matched with a secondary key, is linked to the second slider. The second slider can switch between operation and maintenance positions, and its position is limited by an electromagnetic component linked to the illuminated push-button switch. During operation, the electromagnetic component and mechanical mechanism double-lock the second slider, preventing the secondary key from rotating. In maintenance mode, the device unlocks, allowing the secondary key to be removed. This invention integrates the grounding switch and interlocking mechanism, simplifying operation and effectively ensuring the safety of personnel and equipment during high-voltage switchgear maintenance.

Description

Technical Field

[0001] This invention relates to the field of high-voltage construction safety protection devices, specifically to a high-voltage interlocking device electrical box. Background Technology

[0002] High-voltage construction safety protection devices are core supporting devices in the construction and operation of ultra-high voltage power systems. They are mainly used to ensure the operational safety of personnel and equipment during the operation and maintenance of high-voltage equipment and lines, and are also an important core component of the high-voltage switchgear safety interlocking system.

[0003] Currently, the industry commonly uses a single-structure grounding switch as the core protection device for high-voltage construction safety. Before high-voltage switchgear maintenance, maintenance personnel must manually confirm the de-energization status of the high-voltage line and manually operate the grounding switch to complete the grounding work. The entire operation is highly dependent on manual judgment and operation. This work mode has obvious drawbacks. The uncertainty of manual verification and operation is extremely high, which not only easily leads to operational errors and poses great safety hazards to on-site maintenance personnel, but also creates psychological burden for maintenance personnel, affecting the standardization and stability of construction operations.

[0004] Therefore, there is an urgent need for a high-voltage interlocking device electrical box. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the present invention provides an electrical box for a high-voltage interlocking device.

[0006] This invention discloses an electrical box for a high-voltage interlocking device, including a box body and a door hinged to the front of the box body. A control panel parallel to the door is provided inside the box body. A primary lock, a secondary lock, and a button switch with an indicator light are installed on the side of the control panel facing the door. A first slider and a second slider that can slide laterally are installed on the side of the control panel facing away from the door. The primary lock is connected to the first slider via a transmission. A micro switch is installed inside the housing, and a trigger protrusion is provided on the first slider on the trigger path corresponding to the micro switch. By rotating the primary lock with a primary key, the first slider can be driven to slide away from the second slider, thereby triggering the micro switch via the trigger protrusion. The micro switch is electrically connected to a high-voltage grounding switch outside the housing, and the high-voltage grounding switch is electrically connected to the indicator light section of the illuminated push-button switch. The indicator light section is used to indicate whether the high-voltage grounding switch is in the grounding position. The secondary lock contains a secondary key, which is connected to the second slider. The second slider has a running slot and a maintenance slot. Rotating the secondary key allows the second slider to switch to the running slot or the maintenance slot. The housing is equipped with an electromagnetic component, which is electrically connected to the button of the illuminated push-button switch. When triggered by the button, the electromagnetic component can extend into or out of the running slot or the maintenance slot to apply or release the sliding limit on the second slider. In operation, the electromagnetic component extends into the operating slot to limit the second slider. The first slider is located on the sliding path of the second slider and is in close contact with the second slider to form a mechanical block, restricting the sliding of the second slider. The secondary key is locked in the secondary lock and cannot be rotated. In maintenance, the electromagnetic component extends into the maintenance slot to restrict the sliding of the second slider, and the secondary key is allowed to be removed from the secondary lock.

[0007] As a further improvement of the present invention, the top and bottom of the side of the control panel facing away from the door are respectively provided with a first slide groove and a second slide groove; the top and bottom of the first slider and the second slider are respectively slidably assembled in the first slide groove and the second slide groove; a mounting base is fixedly installed on the side of the first slide groove and the second slide groove away from the control panel, and the electromagnetic component and the micro switch are mounted on the mounting base; the mounting base is formed with a clearance hole for avoiding the sliding of the trigger protrusion.

[0008] As a further improvement of the present invention, the keyhole of the primary lock is located on the front of the control panel, and the tail end of the primary lock passes through the control panel and is provided with a lock cylinder lever, and a pin is provided on the lock cylinder lever; the first slider is provided with a first elliptical groove extending vertically, and the pin is inserted into the first elliptical groove so as to drive the first slider to slide away from the second slider during the rotation of the lock cylinder lever; the back of the control panel is formed with an avoidance groove for avoiding the rotation of the lock cylinder lever.

[0009] As a further improvement of the present invention, the secondary key includes an operating lever and a key body integrally connected thereto, and the outer wall of the key body is provided with a plurality of cylindrical protrusions at intervals along its axis; The secondary lock includes a horizontally arranged cylindrical body. One end of the cylindrical body extends out of the control panel to form a keyhole, and the other end is provided with a mounting base for fixing inside the housing. The outer wall of the cylindrical body has a straight groove and multiple slots communicating with the straight groove. The straight groove extends along the axial direction of the cylindrical body, and the multiple slots are arranged at intervals along the axial direction of the cylindrical body, with the extension direction of the slots perpendicular to the axial direction of the cylindrical body. Each slot is provided in a one-to-one correspondence with each cylindrical protrusion of the secondary key for locking. The key body of the secondary key is inserted into the cylindrical body along the straight groove and its end passes through the mounting base. The operating lever of the secondary key is exposed in the keyhole of the cylindrical body. In operation, the key body of the secondary key is placed inside the cylindrical body, and the multiple cylindrical protrusions of the secondary key are respectively locked in their respective slots.

[0010] As a further improvement of the present invention, the secondary lock further includes a crank sleeve, which is rotatably fitted around the outer periphery of the cylindrical body and located between the control panel and the mounting base. The crank sleeve has a through groove along its axial direction. The crank sleeve extends radially along its outer wall near the control panel to form a first cantilever, which has a horizontally arranged transmission protrusion. The second slider has a vertically extending second elliptical groove corresponding to the transmission protrusion, and the transmission protrusion is fitted into the second elliptical groove. The second slider also has a clearance hole for avoiding the crank sleeve. The crank sleeve extends radially along its outer wall away from the control panel to form a second cantilever, which has a limit hole. A positioning pin assembly is provided inside the housing, and the positioning pin assembly can be telescopically inserted into the limit hole to apply or release the rotation limit on the crank sleeve. In operation, the multiple cylindrical protrusions of the secondary key are respectively locked in their respective slots and simultaneously extend into the through straight groove. After the end of the secondary key passes through the mounting base, it pushes against the positioning pin assembly and disengages it from the limiting hole, releasing the rotation constraint of the crank sleeve. The crank sleeve can rotate with the secondary key until the through straight groove is axially aligned with the straight groove of the cylindrical body. After the secondary key is pulled out, the positioning pin assembly resets and inserts into the limiting hole, restricting the rotation of the crank sleeve.

[0011] As a further improvement of the present invention, the positioning pin assembly includes a guide frame, a positioning pin, a pusher block, and a spring; the guide frame is fixedly installed inside the housing, and the positioning pin is retractably mounted on the guide frame in the horizontal direction; the pusher block is fixed on the positioning pin, and a guide groove is formed on the guide frame along the extension direction of the positioning pin; the upper part of the pusher block abuts against one end of the secondary key protruding from the mounting seat, and the lower part is slidably placed in the guide groove; the spring is sleeved on the positioning pin, and the spring is used to drive the positioning pin to extend and insert into the limiting hole.

[0012] As a further improvement of the present invention, a support plate is formed on the side of the second slider that is away from the control panel. The maintenance slot and the running slot are formed at the end of the support plate that is away from the second slider. The running slot is located close to the first slider, and the maintenance slot is located away from the first slider. The electromagnetic component is installed inside the housing and corresponds to the bottom of the support plate.

[0013] As a further improvement of the present invention, both the maintenance slot and the operation slot are U-shaped notches opened at the end of the tray.

[0014] As a further improvement of the present invention, the electromagnetic component includes an electromagnet, which is provided with a retractable locking tongue. The locking tongue can be switched between the maintenance slot and the running slot to restrict the sliding of the second slider.

[0015] As a further improvement of the present invention, the top of the box door is connected to the upper part of the box body by a hinge, and the box door can be folded up and opened around the hinge point; multiple rotary latches are provided on the lower front of the box door, and spring latches are provided between the two sides of the box door and the box body respectively.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention uses a first slider to form a mechanical blocking structure for the second slider, creating a forced time-sequence mechanical interlock. The second slider can only slide after the first slider is moved away by operating the first-level lock, preventing maintenance personnel from skipping the grounding pre-processing procedures and violating regulations. At the same time, the first-level lock links the micro switch and the high-voltage grounding switch to form an electromechanical linkage system. The indicator light of the push-button switch with lights clearly displays the operating status of the grounding switch, reducing human judgment errors and solving the safety defects of traditional solutions that rely too much on human self-operation.

[0017] This invention features an electromagnetic component that works in conjunction with the running slot and maintenance slot of the second slider to lock the second slider, forming a double-limit protection with the mechanical obstruction of the first slider, providing ample safety redundancy; the secondary key, crank sleeve, and positioning pin assembly work together in a coordinated manner, relying on a spring to drive the positioning pin to achieve automatic locking, and locking the crank sleeve after the key is removed, preventing the gear from being switched arbitrarily, thus improving the reliability of high-voltage operating condition switching control in multiple layers.

[0018] This invention relies on chute guidance and elliptical groove pin transmission to achieve smooth linkage of various components. The overall transmission structure is simple and compact, making it easy to integrate and assemble inside the high-voltage cabinet. It distinguishes between two working modes: operation and maintenance, matching two scenarios: high-voltage equipment operation and maintenance and normal operation. The structure is durable and adaptable to the protection requirements of UHV field operation and maintenance, ensuring the safety of operators entering the high-voltage equipment box for maintenance work. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an electrical box for a high-voltage interlocking device disclosed in one embodiment of the present invention; Figure 2 This is a schematic diagram of the control panel assembly of the electrical box of the high-voltage interlocking device disclosed in one embodiment of the present invention; Figure 3 This is a schematic diagram of the front structure of the control panel of the electrical box of the high-voltage interlocking device disclosed in one embodiment of the present invention; Figure 4 This is a schematic diagram of the back structure of the control panel of the electrical box of the high-voltage interlocking device disclosed in one embodiment of the present invention; Figure 5 This is a side axial view of the control panel of the electrical box of the high-voltage interlocking device disclosed in one embodiment of the present invention; Figure 6 This is a side view of the control panel of the electrical box of the high-voltage interlocking device disclosed in one embodiment of the present invention; Figure 7 This is a schematic diagram of the locating pin assembly of the electrical box of the high-voltage interlocking device disclosed in one embodiment of the present invention; Figure 8 This is a schematic diagram of the tray structure of the electrical box of the high-voltage interlocking device disclosed in one embodiment of the present invention; Figure 9 This is a schematic diagram of the first and second slide groove structures of the electrical box of the high-voltage interlocking device disclosed in one embodiment of the present invention; Figure 10 This is an assembly diagram of the positioning pin assembly, secondary key, and secondary lock of the electrical box of the high-voltage interlocking device disclosed in one embodiment of the present invention; Figure 11 This is a schematic diagram of the positioning pin assembly, secondary key, and secondary lock of the electrical box of the high-voltage interlocking device disclosed in one embodiment of the present invention from another angle. Figure 12 This is an assembly perspective view of the positioning pin assembly, secondary key, and secondary lock of the electrical box of the high-voltage interlocking device disclosed in one embodiment of the present invention; Figure 13 This is a schematic diagram of the secondary key structure of the electrical box of the high-voltage interlocking device disclosed in one embodiment of the present invention; Figure 14 This is a schematic diagram of the two-stage lock structure of the electrical box of the high-voltage interlocking device disclosed in one embodiment of the present invention; Figure 15 This is a schematic diagram of the crank sleeve structure of the electrical box of the high-voltage interlocking device disclosed in one embodiment of the present invention.

[0020] In the picture: 1. Box body; 2. Box door; 3. Handle; 4. Rotary latch lock; 5. Spring latch lock; 6. Hinge; 7. Nameplate; 8. Sealing strip; 9. Control panel; 9-1. Clearance slot; 10. Secondary lock; 10-1. Cylindrical body; 10-2. Mounting base; 10-3. Straight groove; 10-4. Divided groove; 11. Primary lock; 11-1. Lock cylinder lever; 11-2. Pulley; 12. Secondary key; 12-1. Operating lever; 12-2. Key body; 12-3. Cylindrical protrusion; 13. Illuminated push-button switch; 14. Wire hole; 15. First slider; 15-1. First elliptical groove; 16. Second slider; 16-1 17. First mounting base; 18. Second mounting base; 19. Micro switch; 20. Trigger protrusion; 21. Electromagnet; 21-1. Locking tongue; 22. Positioning pin assembly; 22-1. Guide frame; 22-1-1. Guide slide; 22-2. Positioning pin; 22-3. Spring; 22-4. Push slider; 23. First slide; 24. Second slide; 25. Support plate; 25-1. Running slot; 25-2. Maintenance slot; 26. Crank sleeve; 26-1. First cantilever; 26-2. Second cantilever; 26-3. Through straight groove; 26-4. Transmission protrusion; 26-5. Limiting hole. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] The present invention will now be described in further detail with reference to the accompanying drawings: like Figures 1-4As shown, an electrical box for a high-voltage interlocking device according to the present invention includes a box body 1 and a door 2 hinged to the front of the box body 1. A control panel 9 parallel to the door 2 is provided inside the box body 1. A primary lock 11, a secondary lock 10, and a push-button switch with an indicator light are mounted on the side of the control panel 9 facing the door 2. A first slider 15 and a second slider 16, which can slide laterally, are mounted on the side of the control panel 9 facing away from the door 2. The primary lock 11 is connected to the first slider 15 via a transmission connection. A micro switch 19 is provided inside the box body 1, and the trigger circuit of the micro switch 19 is located on the first slider 15. A trigger protrusion 20 is provided on the diameter; by turning the primary lock 11 with the primary key, the first slider 15 can be driven to slide away from the second slider 16, which in turn triggers the trigger protrusion 20 to trigger the micro switch 19; the micro switch 19 is electrically connected to the high-voltage grounding switch outside the housing 1, and is used to send a signal to the high-voltage grounding switch that the primary lock 11 is unlocked. After receiving the signal, the high-voltage grounding switch adjusts to the grounding position. The high-voltage grounding switch is electrically connected to the indicator light part of the illuminated push-button switch 13, and the indicator light part is used to indicate whether the high-voltage grounding switch is in the grounding position; the secondary lock 10 is locked internally. A secondary key 12 is provided, which is connected to a second slider 16 via a transmission. The second slider 16 is provided with a running slot 25-1 and a maintenance slot 25-2. Rotating the secondary key 12 can switch the second slider 16 to either the running slot 25-1 or the maintenance slot 25-2. An electromagnetic component is provided in the housing 1, which is electrically connected to the button part of the illuminated push-button switch 13. The operator can only operate the button part of the illuminated push-button switch 13 after the indicator light of the push-button switch 13 is lit. When triggered by the button part, the electromagnetic component can extend into or retract from the running slot 25-1. Maintenance slot 25-2 is used to apply or release the sliding limit on the second slider 16. In operation, the electromagnetic component extends into the operation slot 25-1 to limit the second slider 16. The first slider 15 is located on the sliding path of the second slider 16 and is in close contact with the second slider 16 to form a mechanical block, restricting the sliding of the second slider 16. The secondary key 12 is locked in the secondary lock 10 and cannot be rotated. In maintenance, the electromagnetic component extends into the maintenance slot 25-2 to restrict the sliding of the second slider 16. At this time, the secondary key 12 is allowed to be removed from the secondary lock 10.

[0025] Specifically: like Figures 1-2As shown, in the above embodiment, preferably, the front of the box body 1 is open, and the top of the box door 2 is hinged to the top of the front of the box body 1 by multiple hinges 6. The box door 2 can be folded upwards and opened by multiple hinges 6 around the hinge points. Sealing strips 8 are arranged in a ring around the opening on the front of the box body 1 to keep the box body 1 sealed. Two rotary latches 4 are symmetrically arranged on the left and right sides of the lower part of the front of the box door 2. The two rotary latches 4 are used to lock the bottom of the box door 2 and the box body 1 after the box door 2 is folded downwards. Two spring latches 5 are provided between the two sides of the box door 2 and the box body 1, respectively. The two spring latches 5 are used to lock the sides of the box door 2 and the box body 1 after the box door 2 is folded downwards. In this embodiment, the front of the box door 2 is also provided with a handle 3 for easy opening of the box door 2 and a nameplate 7 marked with equipment information.

[0026] like Figures 3-5 and Figure 9 As shown, in the above embodiment, preferably, the control panel 9 is fixedly installed inside the housing 1. The control panel 9 is also provided with a through wire hole 14 on the side facing the door 2 (i.e., the front of the control panel 9). The top and bottom of the side of the control panel 9 facing away from the door 2 (i.e., the back of the control panel 9) are respectively provided with a first slide groove 23 and a second slide groove 24. The first slide groove 23 and the second slide groove 24 are respectively extended along the length direction of the control panel 9. The top and bottom of the first slider 15 and the second slider 16 are respectively slidably assembled in the first slide groove 23 and the second slide groove 24. The side of the first slide groove 23 and the second slide groove 24 away from the control panel 9 is fixedly installed with a mounting base plate. The electromagnetic component and the micro switch 19 are installed on the mounting base plate. The mounting base plate is formed with a clearance hole for avoiding the sliding of the trigger protrusion 20. In this embodiment, the mounting base is composed of a first mounting base 17 and a second mounting base 18. The first mounting base 17 is disposed corresponding to the first slider 15. The top and bottom of the first mounting base 17 are fixedly mounted to the first slide groove 23 and the second slide groove 24 by bolts. The first mounting base 17 has a clearance hole and is also equipped with a micro switch 19 and a baffle to prevent the trigger protrusion 20 from moving out of position. The second mounting base 18 is disposed corresponding to the second slider 16. The top and bottom of the second mounting base 18 are fixedly mounted to the first slide groove 23 and the second slide groove 24 by bolts. The top of the second mounting base 18 has a through hole to facilitate the installation and fixation of the secondary lock 10. The bottom of the second mounting base 18 is recessed to form a mounting position for the installation of the electromagnetic component.

[0027] In the above embodiment, preferably, the eye of the primary lock 11 is located on the front of the control panel 9, and the tail end of the primary lock 11 passes through the control panel 9 and is provided with a lock cylinder lever 11-1. A pin 11-2 is provided on the lock cylinder lever 11-1. A first elliptical groove 15-1 extending vertically is provided on the first slider 15, and the pin 11-2 is inserted into the first elliptical groove 15-1 so that the first slider 15 slides away from the second slider 16 during the rotation of the lock cylinder lever 11-1. An avoidance groove 9-1 is formed on the back of the control panel 9 to avoid the rotation of the lock cylinder lever 11-1. In this embodiment, the lock cylinder lever 11-1 is parallel to the control panel 9, and the pin 11-2 is perpendicular to the control panel 9.

[0028] like Figure 13 As shown, in the above embodiment, preferably, the secondary key 12 includes an operating lever 12-1 and a key body 12-2 integrally connected to the operating lever 12-1. The outer wall of the key body 12-2 is provided with a plurality of cylindrical protrusions 12-3 at intervals along its axis.

[0029] like Figure 14 As shown, in the above embodiment, preferably, the secondary lock 10 includes a horizontally arranged cylindrical body 10-1. One end of the cylindrical body 10-1 extends out of the control panel 9 to form a keyhole, and the other end is provided with a mounting base 10-2 for fixing inside the housing 1. In actual installation, the mounting base 10-2 is fixedly installed on the second mounting base plate 18. The outer wall of the cylindrical body 10-1 is provided with a straight groove 10-3 and a plurality of sub-grooves 10-4 communicating with the straight groove 10-3. The straight groove 10-3 extends axially along the cylindrical body 10-1. Multiple slots 10-4 are arranged at intervals along the axial direction of the cylindrical body 10-1, and the extension direction of the slots 10-4 is perpendicular to the axial direction of the cylindrical body 10-1; each slot 10-4 is provided in a one-to-one correspondence with each cylindrical protrusion 12-3 of the secondary key 12 for locking; the key body 12-2 of the secondary key 12 is inserted into the cylindrical body 10-1 along the straight groove 10-3 and the end penetrates the mounting base 10-2; the operating lever 12-1 of the secondary key 12 is placed on the front outer side of the control panel 9 and exposed in the keyhole of the cylindrical body 10-1. In this embodiment, the control panel 9 is provided with a clearance hole at the straight groove 10-3 of the secondary lock 10 to avoid the cylindrical protrusion 12-3 of the secondary key 12; in the operating state, the key body 12-2 of the secondary key 12 is placed inside the cylindrical body 10-1 and is circumferentially deflected inside the cylindrical body 10-1, so that the multiple cylindrical protrusions 12-3 of the secondary key 12 are respectively locked in the corresponding slots 10-4.

[0030] like Figures 5-7 and Figure 15As shown, in the above embodiment, preferably, the secondary lock 10 further includes a crank sleeve 26, which is rotatably fitted around the outer periphery of the cylindrical body 10-1 of the secondary lock 10 and located between the control panel 9 and the mounting base 10-2 of the secondary lock 10. A through groove 26-3 is formed on the cylindrical wall of the crank sleeve 26 along its axial direction. A first cantilever 26-1 is formed radially on the outer wall of the crank sleeve 26 near the control panel 9, and a horizontally arranged transmission protrusion 26-4 is provided on the first cantilever 26-1. A second slider 16 is formed with a vertically extending second elliptical groove 16-1 corresponding to the transmission protrusion 26-4, and the transmission protrusion 26-4 is fitted into the second elliptical groove 16-1. The second slider 16 also has a clearance hole for avoiding the crank sleeve 26 during sliding. A second cantilever 26-2 is formed radially on the outer wall of the crank sleeve 26 away from the control panel 9, and a limit hole 26-5 is provided on the second cantilever 26-2. A positioning pin assembly 22 is provided inside the body 1. In this embodiment, the positioning pin assembly 22 is mounted on the second mounting base plate 18. The positioning pin assembly 22 can be telescopically inserted into the limiting hole 26-5 to apply or release the rotational limitation on the crank sleeve 26. In the operating state, the multiple cylindrical protrusions 12-3 of the secondary key 12 are respectively locked in the corresponding slots 10-4 and simultaneously extend into the through straight groove 26-3 of the crank sleeve 26. After the end of the secondary key 12 passes through the mounting base 10-2, it pushes against the positioning pin assembly 22 and makes it disengage from the limiting hole 26-5, releasing the rotational constraint of the crank sleeve 26. The crank sleeve 26 can rotate with the secondary key 12 until the through straight groove 26-3 is axially aligned with the straight groove 10-3 of the cylindrical body 10-1, so that the cylindrical protrusions 12-3 of the secondary key 12 can be withdrawn. After the secondary key 12 is pulled out, the positioning pin assembly 22 is reset and inserted into the limiting hole 26-5 to limit the rotation of the crank sleeve 26. In this embodiment, during operation, the through groove 26-3 of the crank sleeve 26 is not aligned with the axis of the straight groove 10-3 of the cylindrical body 10-1 of the secondary lock 10, and there is a circumferential deviation between the two. Figure 12 As shown.

[0031] like Figure 8As shown, in the above embodiment, preferably, a support plate 25 is formed on the side of the second slider 16 away from the control panel 9. A maintenance slot 25-2 and a running slot 25-1 are formed at the end of the support plate 25 away from the second slider 16 along the sliding direction of the second slider 16. The running slot 25-1 is located close to the first slider 15, and the maintenance slot 25-2 is located away from the first slider 15. The electromagnetic component is mounted on the second mounting base plate 18 inside the housing 1, corresponding to the area below the support plate 25. In this embodiment, both the maintenance slot 25-2 and the running slot 25-1 are U-shaped notches opened at the end of the support plate 25. The electromagnetic component includes an electromagnet 21, which has a retractable locking tongue 21-1. The locking tongue 21-1 can be switched between the maintenance slot 25-2 and the running slot 25-1 to restrict the sliding of the second slider 16. In this embodiment, the operation of the electromagnet 21 is controlled by the button section of the push-button switch 13. The operator can only activate the electromagnet 21 by pressing the button section when the indicator light on the push-button switch 13 is lit, indicating that the high-voltage grounding switch is in the grounding position. This causes the locking tongue 21-1 of the electromagnet 21 to retract, disengaging the sliding restriction on the second slider 16. The electromagnet in this embodiment is a T2952A type electromagnet.

[0032] like Figures 5-6 and Figures 10-11As shown, in the above embodiment, preferably, the positioning pin assembly 22 includes a guide frame 22-1, a positioning pin 22-2, a pusher slider 22-4, and a spring 22-3; wherein, the guide frame 22-1 is fixedly installed on the second mounting base plate 18 inside the housing 1, and the positioning pin 22-2 is extrudeably mounted on the guide frame 22-1 in the horizontal direction; the pusher slider 22-4 is fixed on the positioning pin 22-2, and a guide groove 22-1-1 is provided on the guide frame 22-1 along the extension direction of the positioning pin 22-2; the upper part of the pusher slider 22-4 abuts against one end of the secondary key 12 that protrudes from the mounting base 10-2, and the lower part is slidably placed in the guide groove 22-1-1; the spring 22-3 is sleeved on the positioning pin 22-2, and the spring 22-3 is used to drive the positioning pin 22-2 to extend and insert into the limiting hole 26-5. In this embodiment, during operation, since the secondary key 12 is locked inside the secondary lock 10, the end of the secondary key 12 passes through the mounting base 10-2 and then retracts the positioning pin 22-2 by pushing the slider 22-4. At this time, the spring 22-3 is compressed, and the positioning pin 22-2 exits the limiting hole 26-5. At this time, the secondary key 12 is successfully unlocked in the primary lock 11, and after the locking tongue 21-1 of the electromagnet 21 is retracted, the secondary key 12 meets the rotation requirement. During maintenance, since the secondary key 12 is removed, after the force applied to the spring 22-3 disappears, the positioning pin 22-2 extends again under the restoring force of the spring 22-3 and is inserted into the limiting hole 26-5 of the crank sleeve 26, thus completing the rotation limitation of the crank sleeve 26.

[0033] In the above embodiment, preferably, the first cantilever 26-1 and the second cantilever 26-2 on the crank sleeve 26 are offset in the circumferential direction, so that when the second slider 16 is in the maintenance slot 25-2 during the rotation of the secondary key 12, the limiting hole 26-5 on the second cantilever 26-2 is exactly on the same axis as the positioning pin 22-2 of the positioning pin assembly 22.

[0034] The working method of this embodiment: 1) In the initial state, the electrical box is in operation. At this time, the running slot 25-1 of the second slider 16 is aligned with the locking tongue 21-1 of the electromagnet 21, and the locking tongue 21-1 of the electromagnet 21 extends into the running slot 25-1, restricting the sliding of the second slider 16. The first slider 15 is located on the sliding path of the second slider 16 and is in close contact with the second slider 16 to form a mechanical block, restricting the sliding of the second slider 16. The secondary key 12 is locked in the secondary lock 10, and because the second slider 16 is locked, the secondary key 12 cannot be turned at this time. 2) By turning the primary lock 11 with the primary key, the first slider 15 can be driven to slide away from the second slider 16, which will trigger the micro switch 19 by the trigger protrusion 20. After the micro switch 19 is triggered, it sends a signal that the primary lock 11 is unlocked to the high-voltage grounding switch outside the housing 1. After the high-voltage grounding switch is adjusted to the grounding position, the indicator light of the drive button switch 13 on the control panel 9 is lit to indicate that it is in the grounding position. In this embodiment, the primary key used to unlock the primary lock 11 is stored in the next higher level of the safety interlocking system.

[0035] 3) The operator presses the button of the actuating button switch 13 to energize the electromagnet 21. At this time, the locking tongue 21-1 of the electromagnet 21 exits the running slot 25-1 and contacts the sliding restriction of the second slider 16. 4) The operator rotates the secondary key 12, causing the internal crank sleeve 26 to rotate simultaneously. The crank sleeve 26 causes the second slider 16 to slide towards the first slider 15, switching the second slider 16 from the running slot 25-1 to the maintenance slot 25-2. After the secondary key 12 is rotated to the correct position, the locking tongue 21-1 of the electromagnet 21 aligns with the maintenance slot 25-2 of the second slider 16. When the button is released, the locking tongue 21-1 of the electromagnet 21 extends again into the maintenance slot 25-2, restricting the sliding of the second slider 16 again. At the same time, after the secondary key 12 is rotated to the correct position, the through groove 26-3 on the crank sleeve 26 axially aligns with the straight groove 10-3 of the secondary lock 10. At this time, the multiple cylindrical protrusions 12-3 of the secondary key 12 are pulled outward through the aligned through groove 26-3 and the straight groove 10-3 of the secondary lock 10, disengaging from the secondary lock 10. 5) After the secondary key 12 is pulled out, the force applied to the positioning pin 22-2 is removed. Under the restoring force of the spring 22-3, the positioning pin 22-2 is inserted into the limiting hole 26-5 of the crank sleeve 26, which is aligned with its axis, thus completing the rotation limit of the crank sleeve 26.

[0036] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-voltage interlocking device electrical box, comprising a box body and a door hinged to the front of the box body, wherein a control panel parallel to the door is disposed inside the box body, characterized in that, The control panel facing the door is equipped with a primary lock, a secondary lock, and a button switch with an indicator light. The control panel facing away from the door is equipped with a first slider and a second slider that can slide laterally. The primary lock is connected to the first slider via a transmission. A micro switch is installed inside the housing, and a trigger protrusion is provided on the first slider on the trigger path corresponding to the micro switch. By rotating the primary lock with a primary key, the first slider can be driven to slide away from the second slider, thereby triggering the micro switch via the trigger protrusion. The micro switch is electrically connected to a high-voltage grounding switch outside the housing, and the high-voltage grounding switch is electrically connected to the indicator light section of the illuminated push-button switch. The indicator light section is used to indicate whether the high-voltage grounding switch is in the grounding position. The secondary lock contains a secondary key, which is connected to the second slider. The second slider has a running slot and a maintenance slot. Rotating the secondary key allows the second slider to switch to the running slot or the maintenance slot. The housing is equipped with an electromagnetic component, which is electrically connected to the button of the illuminated push-button switch. When triggered by the button, the electromagnetic component can extend into or out of the running slot or the maintenance slot to apply or release the sliding limit on the second slider. In operation, the electromagnetic component extends into the operating slot to limit the second slider. The first slider is located on the sliding path of the second slider and is in close contact with the second slider to form a mechanical block, restricting the sliding of the second slider. The secondary key is locked in the secondary lock and cannot be rotated. In maintenance, the electromagnetic component extends into the maintenance slot to restrict the sliding of the second slider, and the secondary key is allowed to be removed from the secondary lock.

2. The electrical box for the high-voltage interlocking device according to claim 1, characterized in that, The top and bottom of the control panel facing away from the door are respectively provided with a first slide groove and a second slide groove; the top and bottom of the first slider and the second slider are respectively slidably assembled in the first slide groove and the second slide groove; a mounting base is fixedly installed on the side of the first slide groove and the second slide groove away from the control panel, and the electromagnetic component and the micro switch are mounted on the mounting base; the mounting base is formed with a clearance hole for avoiding the sliding of the trigger protrusion.

3. The electrical box for the high-voltage interlocking device according to claim 1, characterized in that, The keyhole of the primary lock is located on the front of the control panel. The tail end of the primary lock passes through the control panel and is provided with a lock cylinder lever. A pin is provided on the lock cylinder lever. The first slider is provided with a first elliptical groove extending vertically. The pin is inserted into the first elliptical groove so that the first slider can be driven to slide away from the second slider during the rotation of the lock cylinder lever. The back of the control panel has a clearance groove for preventing the lock cylinder paddle from rotating.

4. The electrical box for the high-voltage interlocking device according to claim 1, characterized in that, The secondary key includes an operating lever and a key body integrally connected thereto. The outer wall of the key body is provided with a plurality of cylindrical protrusions at intervals along its axis. The secondary lock includes a horizontally arranged cylindrical body. One end of the cylindrical body extends out of the control panel to form a keyhole, and the other end is provided with a mounting base for fixing inside the housing. The outer wall of the cylindrical body has a straight groove and multiple slots communicating with the straight groove. The straight groove extends along the axial direction of the cylindrical body, and the multiple slots are arranged at intervals along the axial direction of the cylindrical body, with the extension direction of the slots perpendicular to the axial direction of the cylindrical body. Each slot is provided in a one-to-one correspondence with each cylindrical protrusion of the secondary key for locking. The key body of the secondary key is inserted into the cylindrical body along the straight groove and its end passes through the mounting base. The operating lever of the secondary key is exposed in the keyhole of the cylindrical body. In operation, the key body of the secondary key is placed inside the cylindrical body, and the multiple cylindrical protrusions of the secondary key are respectively locked in their respective slots.

5. The electrical box for the high-voltage interlocking device according to claim 4, characterized in that, The secondary lock also includes a crank sleeve, which is rotatably fitted around the outer periphery of the cylindrical body and located between the control panel and the mounting base. The crank sleeve has a through groove along its axial direction on its cylindrical wall. The crank sleeve extends radially along its outer wall near the control panel to form a first cantilever, which has a horizontally arranged transmission protrusion. The second slider has a vertically extending second elliptical groove corresponding to the transmission protrusion, and the transmission protrusion is fitted into the second elliptical groove. The second slider also has a clearance hole for avoiding the crank sleeve. The crank sleeve extends radially along its outer wall away from the control panel to form a second cantilever, which has a limit hole. A positioning pin assembly is provided inside the housing, and the positioning pin assembly can be telescopically inserted into the limit hole to apply or release the rotation limit on the crank sleeve. In operation, the multiple cylindrical protrusions of the secondary key are respectively locked in their respective slots and simultaneously extend into the through straight groove. After the end of the secondary key passes through the mounting base, it pushes against the positioning pin assembly and disengages it from the limiting hole, releasing the rotation constraint of the crank sleeve. The crank sleeve can rotate with the secondary key until the through straight groove is axially aligned with the straight groove of the cylindrical body. After the secondary key is pulled out, the positioning pin assembly resets and inserts into the limiting hole, restricting the rotation of the crank sleeve.

6. The electrical box for the high-voltage interlocking device according to claim 5, characterized in that, The positioning pin assembly includes a guide frame, a positioning pin, a pusher block, and a spring. The guide frame is fixedly installed inside the housing, and the positioning pin is retractably mounted on the guide frame in the horizontal direction. The pusher block is fixed on the positioning pin, and a guide groove is formed on the guide frame along the extension direction of the positioning pin. The upper part of the pusher block abuts against one end of the secondary key protruding from the mounting seat, and the lower part is slidably placed in the guide groove. The spring is sleeved on the positioning pin and is used to drive the positioning pin to extend and insert into the limiting hole.

7. The electrical box for the high-voltage interlocking device according to claim 1, characterized in that, The second slider extends horizontally outward from the side away from the control panel to form a support plate. The end of the support plate away from the second slider has a maintenance slot and a running slot. The running slot is located close to the first slider, and the maintenance slot is located away from the first slider. The electromagnetic component is installed inside the housing and corresponds to the bottom of the support plate.

8. The electrical box for the high-voltage interlocking device according to claim 7, characterized in that, Both the maintenance slot and the operation slot are U-shaped notches opened at the ends of the tray.

9. The electrical box for the high-voltage interlocking device according to claim 1, characterized in that, The electromagnetic component includes an electromagnet with a retractable locking tongue that can be switched between the maintenance slot and the running slot to restrict the sliding of the second slider.

10. The electrical box for the high-voltage interlocking device according to claim 1, characterized in that, The top of the door is connected to the upper part of the box body by a hinge, and the door can be folded up and opened around the hinge point; multiple rotary latches are provided on the lower front of the door, and spring latches are provided between the two sides of the door and the box body.

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