Visual switch cabinet emergency opening safety protection device

Abstract

The invention relates to the technical field of emergency opening and discloses a visual switch cabinet emergency opening safety protection device which comprises a switch cabinet body, a visual door and window, an emergency opening hole and electrical equipment arranged in the switch cabinet body. The emergency switch-off device comprises a button assembly, a C-shaped plate, an ejector rod and a trigger head, the emergency switch-off device further comprises a first support connected to the bottom end of the C-shaped plate in a screwed mode, a second support is connected to the end, away from the button assembly, of the first support in a screwed mode, and the emergency switch-off device further comprises a safety protection assembly. Therefore, a transmission path between the button assembly and the push rod can be physically isolated, and accidental touch is effectively prevented. And by rotating the cap rod, the rotating shaft and the bevel gear transmission mechanism, an operator can control the opening and closing state of the shielding plate outside the cabinet door, so that the effects of preventing misoperation, ensuring the operation safety of the operator and ensuring the stable operation of a power distribution system are achieved.

Description

Technical Field

[0001] This invention relates to the field of emergency tripping technology, specifically to a visual emergency tripping safety protection device for switchgear. Background Technology

[0002] Power equipment mainly includes two categories: power generation equipment and power supply equipment. Power generation equipment mainly includes power plant boilers, steam turbines, gas turbines, water turbines, generators, transformers, etc. Power supply equipment mainly includes transmission lines of various voltage levels, instrument transformers, contactors, etc.

[0003] In high and medium voltage switchgear, when the electrical opening and closing of the circuit breaker fails, it cannot reliably open or close. In this case, emergency opening and closing via mechanical devices is required. High voltage circuit breakers are prone to power outages and damage to the opening electromagnet during operation, causing them to be unable to perform normal opening operations. In the past, the emergency solution was to open the high voltage switchgear door and have the operator reach inside the cabinet to press the opening button of the high voltage circuit breaker, forcibly performing a manual emergency opening operation. Because the operator is too close to the high voltage and there are no good safety precautions, it is easy to cause injury to the operator. Usually, circuit breakers have an emergency opening and closing button for initiating mechanical opening and closing, but because the circuit breaker is located inside the switchgear, there is a problem of accidental activation during maintenance or normal operation. Summary of the Invention

[0004] The purpose of this invention is to provide a visual switchgear emergency tripping safety protection device that physically isolates the transmission path between the button assembly and the top rod by a rotatable blocking plate located inside the cabinet door, effectively preventing accidental triggering; and through a rotating cap rod, a rotating shaft, and a bevel gear transmission mechanism, allows the operator to control the opening and closing state of the blocking plate from outside the cabinet door, thereby preventing misoperation, ensuring personnel safety, and ensuring the stable operation of the power distribution system. This device solves the problems mentioned in the background art.

[0005] To achieve the above objectives, a visual switchgear emergency trip safety protection device is provided, including a switchgear cabinet and a visual door / window hinged thereto. An emergency trip opening is provided on the visual door / window. Electrical equipment is installed inside the switchgear cabinet. An emergency trip mechanism that mates with the emergency trip opening is provided on the inner side of the switchgear cabinet. The emergency trip mechanism includes a button assembly that passes through the emergency trip opening. A C-shaped plate is screwed to one side of the cabinet door. A trigger head is provided at the end of the top rod away from the button assembly. The device also includes a first bracket screwed to the bottom end of the C-shaped plate and arranged opposite to it. A second bracket is screwed to the end of the first bracket away from the button assembly. The device also includes a top rod that is coaxial with the button assembly and passes through the first and second brackets. Finally, the device includes a safety protection component screwed to the side end face of the C-shaped plate.

[0006] Furthermore, the safety protection component includes an L-shaped swing rod that penetrates the C-shaped plate. A rotating cap rod is provided at the end of the L-shaped swing rod near the C-shaped plate. The rotating cap rod and the L-shaped swing rod are fixedly connected by a pin. A blocking plate is provided at the end of the L-shaped swing rod away from the rotating cap rod. The blocking plate is located between the button assembly and the top rod. The horizontal cross-section of the blocking plate is fan-shaped.

[0007] Furthermore, both the first and second supports are C-shaped. The first support is connected to the C-shaped plate by an upper support pin and a lower support pin. The lower end of the first support is tightly fitted to the C-shaped plate. A first torsion spring is sleeved on the outside of the upper support pin. The opening of the second support faces upward. A return spring is sleeved on the outside of the top rod on the opposite side of the inner side of the second support near the first support. A return spring baffle is provided at one end of the return spring.

[0008] Furthermore, the button assembly includes a button body, in which through holes are provided at both ends, and a button that slides with it is provided in the button body. A columnar guide rod extends outward from one end of the button, and a button return spring is sleeved on the outside of the columnar guide rod. Limiting plates for fixing cabinet doors and C-shaped panels are provided at both the upper and lower ends of the button body.

[0009] Furthermore, the safety protection component includes a mounting bracket, which is L-shaped and has a pivot hole extending through its upper and lower ends on the horizontal plate of the mounting bracket. It also includes a shielding plate pivot, which is coaxial with the pivot hole and rotates in cooperation with it. The bottom end of the shielding plate pivot is connected to the shielding plate by a pin.

[0010] Furthermore, the safety protection component also includes a pivot that passes through the C-shaped panel and the cabinet door. A transmission gear is provided at the pivot end near the partition plate pivot. The transmission gear includes two bevel gears that are coaxially arranged with the pivot and the partition plate pivot respectively and are engaged with a pin. The two bevel gears mesh.

[0011] Furthermore, the safety protection components also include a tripping and resetting torsion spring sleeved on the outside of the rotating shaft, which engages with the rotating cap rod pin at the end of the rotating shaft away from the transmission gear.

[0012] Furthermore, the emergency tripping mechanism also includes an L-shaped fixing plate, a C-shaped plate, and a fixing wing plate integrated with the first and second brackets near the L-shaped fixing plate.

[0013] Furthermore, the safety protection component includes a flip gear fitted on the outside of the shielding plate's rotating shaft. The flip gear is fixed to the shielding plate's rotating shaft by a pin. A third torsion spring is fitted on the side of the shielding plate's rotating shaft. The mounting bracket is U-shaped with its opening facing downwards. The two vertical plates of the mounting bracket are respectively fixed to the C-shaped plate and the first bracket.

[0014] Furthermore, the safety protection component also includes an L-shaped lever on the cabinet door. The lever includes a mounting arm and an actuating arm, which are hinged together. A rack that meshes with the reversing gear is provided on the actuating arm near the end of the reversing gear. A tension spring and a push rod are provided between the mounting arm and the actuating arm. Compared with the prior art, the present invention has the following advantages: 1. By adopting an L-shaped swing rod to drive a fan-shaped blocking plate to physically block the button assembly and the top rod, the device can effectively isolate the transmission of erroneous operation force in non-emergency situations, preventing tripping accidents caused by accidental contact. At the same time, the overall structure is simple and compact, the operation is reliable, the manufacturing cost is low, and it is suitable for switch cabinet occasions where cost is sensitive and basic safety protection is required.

[0015] 2. By adding an external transmission and automatic reset mechanism consisting of a rotating shaft, a bevel gear set, and a torsion spring for interruption and reset, operators can remotely and effortlessly control the opening and closing of the interruption plate from a safe area outside the cabinet without opening the cabinet door. After operation, the protection state is automatically restored, realizing human-machine isolated safe operation and automatic protection recovery, which significantly improves the convenience of operation and system safety.

[0016] 3. By adopting a linkage mechanism of lever-rack-reversing gear driven by the cabinet door, the protection state of the blocking plate can be automatically switched with the opening and closing of the cabinet door, realizing the interlock protection of automatic blocking when the cabinet door is opened and automatic release when the cabinet door is closed. This fundamentally eliminates the lack of protection caused by personnel forgetting to operate, and comprehensively improves the safety protection level of the switch cabinet. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the switchgear of the present invention. Figure 2 This is a schematic diagram of the safety protection component of the present invention; Figure 3 This is a schematic diagram of the emergency tripping of the present invention; Figure 4 For the present invention Figure 3 AA diagram; Figure 5 For the present invention Figure 3 A magnified view of part A; Figure 6 This is a side view of the emergency tripping shaft of the present invention; Figure 7 This is a schematic diagram of one embodiment of the safety protection component of the present invention; Figure 8 This is a schematic diagram of the transmission gears of the safety protection component of the present invention; Figure 9 This is a front view of a security protection component according to another embodiment of the present invention; Figure 10This is an isometric view of a safety protection component according to another embodiment of the present invention.

[0018] Figure 11 This is an isometric view of the mounting arm of the safety protection component according to another embodiment of the present invention.

[0019] In the diagram: 1. Switch cabinet; 2. Electrical equipment; 3. Visual access door / window; 4. Emergency trip opening; 5. Emergency trip; 501. Button assembly; 502. Button; 503. Cabinet door; 504. Second bracket; 505. First bracket; 506. Top rod; 507. Return spring; 508. Return spring baffle; 509. High-voltage circuit breaker trip button; 510. Trigger head; 511. Safety protection component; 512. C-shaped plate; 513. First torsion spring; 514. Interruption return torsion spring; 515. Interruption plate pivot; 516. Pivot; 517. Interruption plate; 518. Mounting bracket; 519. Limiting plate; 520. Columnar guide rod; 521. Rotating cap rod; 522. Transmission gear; 523. L-shaped swing rod; 524. Button return spring; 525. L 526. Fixed plate; 527. Mounting arm; 528. Action arm; 529. Tension spring; 530. Third torsion spring; 531. Reversing gear; 532. Push rod. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] In addition, unless otherwise stated or contradictory, the terms or phrases used in this application have the following meanings: In this application, "first", "second", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated; "multiple" refers to two or more; "connection" can include direct connection and indirect connection, and can include fixed connection and detachable connection, and the specific meaning needs to be understood in combination with the specific scenario.

[0022] In one implementation, such as Figure 1The illustrated emergency tripping safety protection device for a visual switchgear includes a switchgear cabinet 1 and a visual door / window 3 hinged thereto. An emergency tripping opening 4 is provided on the visual door / window 3. Electrical equipment 2 is provided inside the switchgear cabinet 1. An emergency tripping device 5 that cooperates with the emergency tripping opening 4 is provided on the inner side of the switchgear cabinet 1. The device is characterized in that: the emergency tripping device 5 includes a button assembly 501 that passes through the emergency tripping opening 4; a C-shaped plate 512 is screwed to one side of the cabinet door 503; a trigger head 510 is provided at the end of the top rod 506 away from the button assembly 501; a first bracket 505 is screwed to the bottom end of the C-shaped plate 512 and arranged opposite to it; a second bracket 504 is screwed to the end of the first bracket 505 away from the button assembly 501; a top rod 506 that is coaxial with the button assembly 501 and passes through the first bracket 505 and the second bracket 504; and a safety protection component 511 that is screwed to the side end face of the C-shaped plate 512.

[0023] The switch cabinet 1 is a hollow rectangular cabinet structure, which houses the electrical equipment 2. The viewing door 3 is made of transparent tempered glass, allowing operators to directly observe the operating status of the electrical equipment 2 inside the switch cabinet 1, such as the status of indicator lights and the wiring connection, without having to open the door or window to make a preliminary judgment on the equipment's operating status. The emergency trip opening 4 is a circular hole structure, the diameter of which is adapted to the outer diameter of the button assembly 501. This ensures that the button assembly 501 can pass through the emergency trip opening 4, while also preventing dust, moisture, and other foreign objects from entering the switch cabinet 1 due to excessive gaps in the opening, thus preventing foreign objects from affecting the insulation performance or circuit connection of the electrical equipment 2.

[0024] Secondly, the C-shaped plate 512 in the emergency trip 5 is bolted to one side of the cabinet door 503. The opening of the C-shaped plate 512 faces inward, and the opening side of its C-shaped structure faces the internal space of the switch cabinet 1. The first bracket 505 is bolted to the bottom end of the C-shaped plate 512, and the first bracket 505 and the C-shaped plate 512 are arranged opposite each other. The first bracket 505 is C-shaped in general, and its opening faces outward. The second bracket 504 is bolted to the end of the first bracket 505 away from the button assembly 501, and the second bracket 504 is C-shaped in general, and its opening faces upward. Together with the horizontal support of the first bracket 505, they form a three-dimensional double-layer support system, which can limit the top rod 506 from both horizontal and vertical directions, further reducing the probability of radial displacement of the top rod 506 during axial movement.

[0025] Secondly, the push rod 506 and the button assembly 501 are coaxially arranged. The push rod 506 passes through the first bracket 505 and the second bracket 504. The first bracket 505 and the second bracket 504 are respectively provided with guide through holes that are adapted to the outer diameter of the push rod 506. The trigger head 510 is located at the end of the push rod 506 away from the button assembly 501 and cooperates with the high-voltage circuit breaker trip button 509.

[0026] Please see the appendix Figure 2 and Figure 6 As shown, the safety protection component 511 includes an L-shaped swing rod 523 that penetrates the C-shaped plate 512. A rotating cap rod 521 is provided at the end of the L-shaped swing rod 523 near the C-shaped plate 512. The rotating cap rod 521 and the L-shaped swing rod 523 are fixedly connected by a pin. A blocking plate 517 is provided at the end of the L-shaped swing rod 523 away from the rotating cap rod 521. The blocking plate 517 is located between the button assembly 501 and the top rod 506. The horizontal cross-section of the blocking plate 517 is fan-shaped.

[0027] The rotating cap rod 521 is spoon-shaped, making it convenient for operators to rotate using a wrench or by hand. The blocking plate 517 is located at the end of the L-shaped swing rod 523 away from the rotating cap rod 521. The blocking plate 517 is made of stamped metal sheet, and its horizontal cross section is fan-shaped. The radius of the fan is greater than the distance between the top rod 506 and the button assembly 501, and the center of the fan coincides with the rotation axis of the L-shaped swing rod 523, ensuring that the blocking plate 517 can completely cover or detach from the area between the top rod 506 and the button assembly when rotating. During operation, the safety protection component 511 is in a protective state. At this time, the blocking plate 517, driven by the L-shaped swing rod 523, is located between the button assembly 501 and the push rod 506. The fan-shaped blocking plate 517 completely blocks the movement path of the push rod 506. Even if the operator accidentally touches the trigger head 510 and applies a pushing force, the push rod 506 will be blocked by the blocking plate 517 and cannot move toward the button assembly 501, thereby preventing the button assembly 501 from being accidentally triggered, preventing the electrical equipment 2 from shutting down due to accidental tripping, and ensuring the stable operation of the power distribution system.

[0028] When electrical equipment 2 inside the switchgear experiences a short circuit, overload, or other emergency tripping, the operator observes the abnormality through the visualization door and window 3. First, the operator rotates the rotating cap rod 521. Rotating the cap rod 521 causes the L-shaped swing rod 523 to rotate around the mounting hole axis on the C-shaped plate 512. Simultaneously, the L-shaped swing rod 523 drives the blocking plate 517 to rotate until the blocking plate 517 is completely disengaged from the area between the button assembly 501 and the top rod 506. At this point, the safety protection component 511 is unlocked. The operator then presses the button assembly 501 to push the top rod 506, which in turn pushes the trigger head 510 to press the high-voltage circuit breaker tripping button 509, triggering the high-voltage circuit breaker to operate. This achieves emergency tripping of electrical equipment 2, cutting off the circuit to prevent the fault from escalating.

[0029] Please see the appendix Figure 3-4 As shown, both the first bracket 505 and the second bracket 504 are C-shaped. The first bracket 505 is connected to the C-shaped plate 512 by an upper support pin and a lower support pin. The lower end of the first bracket 505 is tightly fitted to the C-shaped plate 512. A first torsion spring 513 is sleeved on the outside of the upper support pin. The opening of the second bracket 504 faces upward. A return spring 507 is sleeved on the outside of the top rod 506 on the inner side of the second bracket 504, which is opposite to the first bracket 505. A return spring baffle 508 is provided at one end of the return spring 507.

[0030] The first bracket 505 has an opening facing outwards from the cabinet. The first bracket 505 is connected to the C-shaped plate 512 via an upper support pin and a lower support pin. Both ends of the pins are fixed by retaining springs to prevent them from falling off during use. The lower end of the first bracket 505 is tightly fitted to the C-shaped plate 512. A first torsion spring 513 is sleeved on the outside of the upper support pin. One end of the first torsion spring 513 abuts against the inner wall of the C-shaped plate 512, and the other end abuts against the inner side wall of the first bracket 505. In its natural state, the first torsion spring 513 can apply a continuous preload to the first bracket 505, so that the first bracket 505 always remains tightly fitted to the C-shaped plate 512.

[0031] Secondly, the opening of the second bracket 504 faces upwards from the cabinet, and this opening direction is perpendicular to the opening direction of the C-shaped plate 512 facing inwards from the cabinet. This vertical opening design can effectively prevent the second bracket 504 from interfering with other components inside the switch cabinet 1, while reserving sufficient space for the axial movement of the top rod 506. On the inner side of the second bracket 504, near the first bracket 505, a return spring 507 is provided and sleeved on the outside of the top rod 506. One end of the return spring 507 abuts against the inner wall of the second bracket 504, and the other end is provided with a return spring baffle 508. The return spring baffle 508 is fixedly installed on the peripheral side of the top rod 506 by bolts, and the outer diameter of the return spring baffle 508 is larger than the inner diameter of the return spring 507, which can effectively block the return spring 507 and prevent the return spring 507 from falling off the top rod 506.

[0032] When the push rod 506 moves toward the button assembly 501, the reset spring baffle 508 moves synchronously with the push rod 506, thereby compressing the reset spring 507 and storing elastic potential energy in the reset spring 507. When the external force that triggered the tripping operation disappears, the reset spring 507 releases the stored elastic potential energy, pushing the reset spring baffle 508 to drive the push rod 506 to move in the opposite direction, realizing the automatic reset of the push rod 506 and preparing for the next emergency tripping operation.

[0033] Please see the appendix Figure 5 As shown, the button assembly 501 includes a button body, with through holes extending through both the left and right ends of the button body. A button 502 is provided in the button body and slides with it. A columnar guide rod 520 extends outward from one end of the button 502. A button return spring 524 is sleeved on the outside of the columnar guide rod 524. Limiting plates 519 for fixing the cabinet door 503 and the C-shaped plate 512 are provided at both the upper and lower ends of the button body.

[0034] The button body has a hollow structure and a through hole that runs through its left and right ends. The through hole provides a sliding channel for the button 502. The button 502 is set in the through hole of the button body and slides with the inner wall of the through hole, so that the button 502 can move freely along the axis in the through hole. Secondly, a columnar guide rod 520 extends outward from one end of the button 502. The columnar guide rod 520 and the button 502 are integrally formed and coaxially arranged. The outer diameter of the columnar guide rod 520 is smaller than the outer diameter of the button 502. Its extension direction is towards the top rod 506. When the button assembly 501 moves towards the top rod 506, the end of the top rod 506 can accurately contact the columnar guide rod 520 and be pushed by the columnar guide rod 520, thereby causing the top rod 506 to move towards the high-voltage circuit breaker trip button 509. Furthermore, a button reset spring 524 is sleeved on the outer side of the columnar guide rod 520. One end of the button reset spring 524 abuts against the inner wall of the button body, and the other end abuts against the end face of the button 502. When the button 502 is pressed and moves toward the push rod 506, the button reset spring 524 is compressed and stores elastic potential energy. When the external force driving the button 502 to move disappears, the button reset spring 524 will release the elastic potential energy and push the button 502 to move in the opposite direction along the through hole, thereby realizing the automatic reset of the button 502 and returning it to the initial position to wait for the next active action.

[0035] Please see the appendix Figure 7-8 As shown, the safety protection component 511 includes a mounting bracket 518, which is L-shaped. A pivot hole is provided on the horizontal plate of the mounting bracket 518, passing through its upper and lower ends. It also includes a shielding plate pivot 515, which is coaxial with the pivot hole and rotates in cooperation with it. The bottom end of the shielding plate pivot 515 is connected to the shielding plate 517 by a pin.

[0036] The mounting bracket 518 is L-shaped and consists of mutually perpendicular horizontal and vertical plates. The vertical plate of the mounting bracket 518 is bolted to the side end face of the C-shaped plate 512, while the horizontal plate extends horizontally to the area above the top rod 506 and the button assembly 501. Secondly, a pivot hole is provided on the horizontal plate of the mounting bracket 518, passing through its upper and lower ends. The pivot 515 of the shielding plate is set in the pivot hole. The pivot 515 of the shielding plate is coaxial with the pivot hole and rotates in cooperation. The pivot 515 of the shielding plate can rotate flexibly around the axis of the pivot hole. Its bottom end extends out of the pivot hole and is connected to the shielding plate 517 through a pin. When the pivot 515 of the shielding plate rotates, it can drive the shielding plate 517 to rotate synchronously, thereby changing the position of the shielding plate 517, realizing the switching between the protection state and the unlocking state of the safety protection component 511, and thus controlling whether the button 502, as the active structure, can drive the top rod 506 to move.

[0037] Please see the appendix Figure 7-8 As shown, the safety protection component 511 also includes a rotating shaft 516 that passes through the C-shaped plate 512 and the cabinet door 503. A transmission gear 522 is provided at the end of the rotating shaft 516 near the end of the shielding plate rotating shaft 515. The transmission gear 522 includes two bevel gears that are coaxially arranged with the rotating shaft 516 and the shielding plate rotating shaft 515 respectively and are engaged with the pin shaft. The two bevel gears mesh.

[0038] The rotating shaft 516 passes through the corresponding through holes on the C-shaped plate 512 and the cabinet door 503. A transmission gear 522 is provided at one end of the rotating shaft 516 near the shielding plate rotating shaft 515. The transmission gear 522 includes two bevel gears. One bevel gear is coaxially arranged with the rotating shaft 516 and fixedly connected by a pin. The other bevel gear is coaxially arranged with the shielding plate rotating shaft 515 and fixedly connected by a pin. The two bevel gears mesh with each other and can transmit the rotational motion of the rotating shaft 516 to the shielding plate rotating shaft 515 and change the direction of rotation. This allows the operator to rotate the rotating cap rod 521 outside the cabinet door 503, thereby driving the shielding plate rotating shaft 515 and the shielding plate 517 to rotate through the cooperation of the rotating shaft 516 and the transmission gear 522. The operation is convenient and labor-saving, and there is no need to go deep into the switch cabinet 1 to operate.

[0039] Secondly, a cut-off and reset torsion spring 514 is sleeved on the outside of the rotating shaft 516. One end of the cut-off and reset torsion spring 514 abuts against the outer wall of the cabinet door 503, and the other end abuts against the limiting protrusion on the rotating shaft 516. In its natural state, the cut-off and reset torsion spring 514 can apply a continuous reset torque to the rotating shaft 516, keeping the rotating shaft 516 in its initial position and ensuring that it is in the non-unlocked state. The cut-off plate 517 can effectively block the movement of the top rod 506 and limit the range of motion of the button 502.

[0040] Please see the appendix Figure 7-8 As shown, the safety protection component 511 also includes a cut-off and reset torsion spring 514 sleeved on the outside of the rotating shaft 516, which cooperates with the pin of the rotating cap rod 521 at the end of the rotating shaft 516 away from the transmission gear 522.

[0041] The end of the rotating shaft 516 away from the transmission gear 522 is connected to the rotating cap rod 521 by a pin. The rotation of the rotating cap rod 521 can directly drive the rotating shaft 516 to rotate synchronously.

[0042] During operation, the safety protection component 511 is in a protective state. By applying a reset torque to the rotating shaft 516, the rotating shaft 516 is kept in its initial position. The rotating shaft 516 drives the blocking plate rotating shaft 515 to rotate to a preset angle through the transmission gear 522. The blocking plate rotating shaft 515 then drives the blocking plate 517 to be located in the area between the top rod 506 and the button assembly 501. The fan-shaped blocking plate 517 completely covers the movement path of the top rod 506. Even if the button 502 is accidentally pressed, the columnar guide rod 520 will be unable to push the top rod 506 because the top rod 506 is blocked by the blocking plate 517, thereby restricting the further movement of the button 502, preventing the button assembly 501 from being accidentally triggered, preventing the electrical equipment 2 from shutting down due to accidental tripping, and ensuring the stable operation of the power distribution system.

[0043] Meanwhile, the first torsion spring 513 is in its natural state, applying a continuous preload to the first bracket 505, ensuring that the first bracket 505 remains in close contact with the C-shaped plate 512, thus ensuring stable support of the first bracket 505 for the push rod 506; the return spring 507 is in its natural state, and the push rod 506 remains in its initial position under the limiting action of the return spring 507 and the trigger head 510; the button return spring 524 in the button assembly 501 is in a slightly compressed state, applying a spring force to the button 502 in a direction away from the push rod 506, keeping the button 502 in its initial position, the button assembly 501 is in an untriggered state, and the electrical equipment 2 operates normally.

[0044] When electrical equipment 2 inside the switchgear experiences a short circuit, overload, or other emergency tripping, the operator observes the abnormal state of electrical equipment 2 through the visualization door and window 3. The first step is to unlock the safety protection component 511. The operator holds the rotating cap rod 521 and applies rotational force, causing the rotating shaft 516 to rotate against the reset torque of the tripping reset torsion spring 514. During rotation, the rotating shaft 516 drives a bevel gear fixedly connected to it via a pin to rotate synchronously. This bevel gear, through meshing transmission, drives another gear connected to the tripping plate... The bevel gear fixedly connected to the rotating shaft 515 rotates, which in turn drives the rotating shaft 515 of the blocking plate to rotate around the rotating shaft hole on the horizontal plate of the mounting bracket 518. The rotating shaft 515 of the blocking plate then drives the blocking plate 517 to rotate synchronously until the blocking plate 517 is completely separated from the area between the top rod 506 and the button assembly 501. At this time, the safety protection component 511 is in the unlocked state. The blocking reset torsion spring 514 is deformed due to the rotation of the rotating shaft 516 and stores elastic potential energy. The movement path of the top rod 506 is no longer blocked and can move in conjunction with the active action of the button 502.

[0045] As an active structure, button 502 begins to move actively along the through hole of the button body toward the push rod 506 when pressed by an external operator. During the movement, button 502 drives the integrally formed columnar guide rod 520 to move synchronously. When the end of columnar guide rod 520 contacts the end of push rod 506, as button 502 continues to move, columnar guide rod 520 applies a pushing force to push rod 506, pushing push rod 506 to move away from button assembly 501 along the guide through holes on first bracket 505 and second bracket 504.

[0046] During the movement of the push rod 506, it drives the reset spring baffle 508 fixed on its peripheral side to move synchronously. During the movement, the reset spring baffle 508 compresses the reset spring 507 inside the second bracket 504, so that the reset spring 507 stores elastic potential energy. When the button 502 moves to the preset stroke, it triggers the tripping mechanism inside the button assembly 501, thereby realizing the emergency tripping of the electrical equipment 2, cutting off the power supply circuit of the electrical equipment 2, preventing the fault from expanding, and protecting the safety of the electrical equipment 2 and the entire power distribution system.

[0047] After the external force driving the button 502 to move disappears, the button reset spring 524 in the button assembly 501 releases its stored elastic potential energy, pushing the button 502 to move in the opposite direction along the through hole of the button body. The button 502 drives the columnar guide rod 520 to reset synchronously. The pushing force of the columnar guide rod 520 on the push rod 506 disappears. Subsequently, the reset spring 507 inside the second bracket 504 releases its stored elastic potential energy, pushing the reset spring baffle 508 to drive the push rod 506 to move in the opposite direction along the guide through hole. The push rod 506 returns to its original position. Initial position; simultaneously, the operator releases their grip on the rotating cap rod 521, the interruption and reset torsion spring 514 releases the stored elastic potential energy, causing the rotating shaft 516 to rotate in the opposite direction. The rotating shaft 516 drives the interruption plate rotating shaft 515 to rotate in the opposite direction through the transmission gear 522. The interruption plate rotating shaft 515 then drives the interruption plate 517 back to the protective position between the top rod 506 and the button assembly 501. The safety protection component 511 returns to the protective state, preventing subsequent accidental touch operations from causing the button 502 to activate again.

[0048] Please see the appendix Figure 9-11 As shown, the emergency tripping 5 also includes an L-shaped fixing plate 525, a C-shaped plate 512, a first bracket 505, and a second bracket 504 with a fixing wing plate integrated near the end of the L-shaped fixing plate 525.

[0049] Among them, the L-shaped fixing plate 525 is made of metal and consists of two integrally formed vertical plates. The vertical plates are tightly fitted to the inner side wall of the switch cabinet 1, and the horizontal plate is the supporting carrier for the C-shaped plate 512, the first bracket 505 and the second bracket 504. Secondly, the C-shaped plate 512, the first bracket 505, and the second bracket 504 are all integrally connected to a fixed wing plate perpendicular to themselves at one end near the L-shaped fixing plate 525, ensuring that the central axis of the C-shaped plate 512, the first bracket 505, and the second bracket 504 are consistent, thereby ensuring the fitting accuracy between the top rod 506 and the button assembly 501.

[0050] The safety protection component 511 includes a flip gear 530 sleeved on the outside of the shielding plate pivot 515. The flip gear 530 is fixed to the shielding plate pivot 515 by a pin. A third torsion spring 529 is sleeved on the outside of the shielding plate pivot 515. The mounting bracket 518 is U-shaped with the opening facing downward. The two vertical plates of the mounting bracket 518 are respectively fixed to the C-shaped plate 512 and the first bracket 505.

[0051] The mounting bracket 518 is U-shaped with two parallel vertical plates that are tightly fixed to the side end face of the C-shaped plate 512 and the side end face of the first bracket 505 by bolts, providing more stable rotational support for the blocking plate pivot 515.

[0052] Secondly, the blocking plate rotating shaft 515 passes through the middle of the horizontal plate of the mounting bracket 518 in a vertical direction. A flip gear 530 is sleeved on the outside of the blocking plate rotating shaft 515, so that the blocking plate rotating shaft 515 can rotate synchronously with the flip gear 530 without relative displacement. The third torsion spring 529 is located between the transmission gear 522 and the mounting bracket 518. One end of the third torsion spring 529 abuts against the mounting bracket 518, and the other end abuts against the outer circumferential surface of the blocking plate rotating shaft 515.

[0053] The safety protection component 511 also includes an L-shaped lever on the cabinet door 503. The lever includes a mounting arm 526 and an actuating arm 527, which are hinged together. A rack that meshes with the rotating gear 530 is provided on the end of the actuating arm 527 near the rotating gear 530. A tension spring 528 and a push rod 531 are provided between the mounting arm 526 and the actuating arm 527.

[0054] The lever consists of a mounting arm 526 and an actuating arm 527. One end of the mounting arm 526 is fixed to the inner wall of the cabinet door 503 by bolts, and the other end is hinged to one end of the actuating arm 527 by a pin, allowing the actuating arm 527 to rotate flexibly around the hinge point. The end of the actuating arm 527 away from the mounting arm 526 extends toward the flip gear 530, and a rack that is perfectly matched with the teeth of the flip gear 530 is provided on the inner wall of this end. The rack and the flip gear 530 mesh with each other to form a stable gear and rack transmission structure. The two ends of the tension spring 528 are hooked onto the hanging holes of the mounting arm 526 and the actuating arm 527 respectively. In its natural state, it is in a relaxed state, so that the flip gear 530 and the actuating arm 527 are in a non-meshing state when the cabinet door 503 is closed. One end of the push rod 531 is hinged to the middle position of the mounting arm 526 by a pin, and the other end abuts against the inner wall of the middle part of the actuating arm 527. The push rod 531 uses a compression rod to generate opposite forces to the tension spring 528.

[0055] Finally, the rotating shaft 516 is slidably engaged with the cabinet door 503. A pin baffle is provided on the outer side of the rotating shaft 516. At least two steps are provided along the axial direction of the through hole on the cabinet door 503. Each step is provided with a baffle through hole that engages with the pin baffle. The angle of the baffle through hole on different steps is 90-180 degrees.

[0056] When the cabinet door 503 is opened during operation, the cabinet door 503 drives the mounting arm 526 of the lever to move synchronously. The mounting arm 526 drives the action arm 527 to move outward from the cabinet door through the hinge point. The rack of the action arm 527 drives the flip gear 530 to rotate. The flip gear 530 drives the blocking plate shaft 515 to rotate against the preload of the third torsion spring 529 until the blocking plate 517 rotates between the top rod 506 and the button 502, completely blocking the contact path between the two.

[0057] At this time, the cabinet door 503 has been opened to the preset operating angle. The actuating arm 527 and the flip gear 530 are tightly engaged under the action of the tension spring 528. At the same time, the position of the actuating arm 527 is fixed, and its rack and flip gear 530 are stably meshed. The rack generates a continuous locking force on the flip gear 530. This locking force is greater than the preload force of the third torsion spring 529 on the shutter plate shaft 515, so that the shutter plate shaft 515 cannot rotate in the opposite direction. Therefore, the shutter plate 517 is stably maintained in the protective position between the top rod 506 and the button 502, and will not return to its original position under the action of the third torsion spring 529.

[0058] Cabinet door 503 drives mounting arm 526 to disengage from its original limit position and reset along the original path. Mounting arm 526 pulls actuating arm 527 to move in the opposite direction in a straight line through the hinge point. At the same time, the slight tension of tension spring 528 assists actuating arm 527 to accelerate reset. During the reset process of actuating arm 527, rack drives reversing gear 530 to rotate in the opposite direction. Under the preload of third torsion spring 529, the shielding plate shaft 515 rotates synchronously in the opposite direction, ultimately driving shielding plate 517 to disengage from the area between top rod 506 and button 502, releasing the initial protective state. At this time, actuating arm 527 disengages from reversing gear 530.

[0059] If it is necessary to press button 502 and then push rod 506 to press high-voltage circuit breaker trip button 509 to achieve emergency tripping, the operator must first hold the rotating cap rod 521 on the outside of cabinet door 503 and rotate it. The rotating cap rod 521 drives the rotating shaft 516 to rotate synchronously until the pin baffle on the outside of rotating shaft 516 is completely aligned with the angle of the baffle through hole of the corresponding step in the through hole of cabinet door 503. Then, push the rotating cap rod 521 into the cabinet along the axis of rotating shaft 516, driving rotating shaft 516 to move into the cabinet. The pin baffle passes through the baffle through hole with rotating shaft 516. When rotating shaft 516 moves to the preset position, the two bevel gears of transmission gear 522 are fully engaged, completing the unlocking preparation.

[0060] After unlocking, the operator presses button 502. Button 502 moves along the through hole of the button body toward the top rod 506, driving the columnar guide rod 520 to move synchronously. After the columnar guide rod 520 contacts the end of the top rod 506, it pushes the top rod 506 to move along the guide through holes of the first bracket 505 and the second bracket 504. The end of the top rod 506 away from button 502 finally presses the high-voltage circuit breaker trip button 509 to realize emergency tripping.

[0061] After the circuit breaker is tripped, the operator rotates the rotating cap rod 521 in the opposite direction, causing the rotating shaft 516 to rotate in the opposite direction, so that the pin baffle is realigned with the baffle through hole in the cabinet door 503. Then, the operator pulls the rotating cap rod 521 outward along the axial direction, causing the rotating shaft 516 to reset outward. The inner end of the rotating shaft 516 disengages from the abutment of the operating arm 527. At the same time, the reset of the rotating shaft 516 causes the two bevel gears of the transmission gear 522 to disengage. When the rotating shaft 516 is fully reset, the pin baffle abuts against the stepped end face of the through hole in the cabinet door 503, restricting the axial movement of the rotating shaft 516.

[0062] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A visual emergency tripping safety protection device for a switchgear, comprising a switchgear cabinet and a visual door / window hinged thereto, wherein an emergency tripping opening is provided on the visual door / window, electrical equipment is provided inside the switchgear cabinet, and an emergency tripping device is provided on the inner side of the switchgear cabinet to cooperate with the emergency tripping opening, characterized in that: The emergency tripping device includes a button assembly that passes through the emergency tripping opening, a C-shaped plate screwed to one side of the cabinet door, a trigger head provided at the end of the top rod away from the button assembly, a first bracket screwed to the bottom of the C-shaped plate and arranged opposite to it, a second bracket screwed to the end of the first bracket away from the button assembly, a top rod coaxial with the button assembly and passing through the first and second brackets, and a safety protection component screwed to the side end face of the C-shaped plate.

2. The emergency tripping safety protection device for visual switchgear according to claim 1, characterized in that: The safety protection component includes an L-shaped swing rod that penetrates the C-shaped plate. A rotating cap rod is provided at the end of the L-shaped swing rod near the C-shaped plate. The rotating cap rod and the L-shaped swing rod are fixedly connected by a pin. A blocking plate is provided at the end of the L-shaped swing rod away from the rotating cap rod. The blocking plate is located between the button assembly and the top rod. The horizontal cross-section of the blocking plate is fan-shaped.

3. The emergency tripping safety protection device for visual switchgear according to claim 2, characterized in that: Both the first bracket and the second bracket are C-shaped. The first bracket is connected to the C-shaped plate by an upper support pin and a lower support pin. The lower end of the first bracket is tightly fitted to the C-shaped plate. A first torsion spring is sleeved on the outside of the upper support pin. The opening of the second bracket faces upward. A return spring is sleeved on the outside of the top rod on the opposite side of the inner side of the second bracket near the first bracket. A return spring baffle is provided at one end of the return spring.

4. The emergency tripping safety protection device for visual switchgear according to claim 3, characterized in that: The button assembly includes a button body with through holes extending through both the left and right ends. A button that slides with the button body is provided inside the button body. A columnar guide rod extends outward from one end of the button. A button reset spring is sleeved on the outside of the columnar guide rod. Limiting plates for fixing cabinet doors and C-shaped panels are provided at both the upper and lower ends of the button body.

5. The emergency tripping safety protection device for a visual switchgear according to claim 4, characterized in that: The safety protection component includes a mounting bracket, which is L-shaped. A pivot hole is provided on the horizontal plate of the mounting bracket, passing through its upper and lower ends. It also includes a shielding plate pivot, which is coaxial with the pivot hole and rotates in cooperation with it. The bottom end of the shielding plate pivot is connected to the shielding plate by a pin.

6. The emergency tripping safety protection device for a visual switchgear according to claim 5, characterized in that: The safety protection component also includes a rotating shaft that passes through the C-shaped panel and the cabinet door. A transmission gear is provided at the end of the rotating shaft near the shielding panel. The transmission gear includes two bevel gears that are coaxially arranged with the rotating shaft and the shielding panel rotating shaft respectively and are engaged with the pin shaft. The two bevel gears mesh.

7. The emergency tripping safety protection device for a visual switchgear according to claim 6, characterized in that: The safety protection component also includes a cut-off and reset torsion spring sleeved on the outside of the rotating shaft, which cooperates with the rotating cap rod pin at the end of the rotating shaft away from the transmission gear.

8. The emergency tripping safety protection device for visual switchgear according to claim 4, characterized in that: The emergency tripping device also includes an L-shaped fixing plate, a C-shaped plate, a first bracket, and a second bracket with a fixing wing plate integrated at the end near the L-shaped fixing plate.

9. The emergency tripping safety protection device for a visual switchgear according to claim 8, characterized in that: The safety protection component includes a flip gear sleeved on the outside of the shielding plate's rotating shaft. The flip gear is fixed to the shielding plate's rotating shaft by a pin. A third torsion spring is sleeved on the side of the shielding plate's rotating shaft. The mounting bracket is U-shaped with its opening facing downwards. The two vertical plates of the mounting bracket are respectively fixed to the C-shaped plate and the first bracket.

10. The emergency tripping safety protection device for a visual switchgear according to claim 9, characterized in that: The safety protection component also includes an L-shaped lever on the cabinet door. The lever includes a mounting arm and an actuating arm, which are hinged together. A rack that meshes with the actuating gear is provided near the end of the actuating arm close to the reversing gear. A tension spring and a push rod are provided between the mounting arm and the actuating arm.

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