Integrated electromagnetic repulsion mechanism and interlocking device for an air chamber

Abstract

The application discloses an integrated electromagnetic repulsion mechanism and interlocking device for an inflation cabinet, which comprises a repulsion mechanism frame, a circuit breaker arranged at the back of the repulsion mechanism frame, a three-position operating mechanism arranged at the top of the repulsion mechanism frame, an electromagnetic repulsion mechanism, a tripping assembly and a lower door interlocking assembly arranged in the repulsion mechanism frame; the electromagnetic repulsion mechanism comprises a repulsion disc assembly, the repulsion disc assembly can move back and forth to produce displacement, thereby driving the inflation cabinet circuit breaker main switch to perform tripping and closing actions; a tripping button is pressed to drive a tripping shaft to rotate, thereby driving a tripping block to push a tripping spring baffle forward to move, and the circuit breaker main switch is tripped; meanwhile, the lower door interlocking rod is limited to move upward, and the three-position operating mechanism is unlocked; when tripping, the application can unlock the limitation on the three-position operating mechanism, and at the same time, the lower door interlocking rod is locked to prevent the lower door from being opened, and through the interlocking actions among the mechanisms, the use is more convenient and safe.

Description

Technical Field

[0001] This invention relates to the field of switchgear control equipment technology, specifically to an integrated electromagnetic repulsion mechanism and interlocking device for gas-insulated switchgear. Background Technology

[0002] Most circuit breakers in the market currently use spring-operated mechanisms to achieve opening and closing actions. These mechanisms typically contain hundreds of parts, with complex transmission mechanisms, numerous sliding friction surfaces, and demanding manufacturing processes. During long-term operation, wear, corrosion, and lubricant loss and solidification can all lead to operational errors. Furthermore, the numerous transmission links result in insufficient mechanical stability.

[0003] In comparison, electromagnetic repulsion mechanisms offer significant advantages in terms of start-up time, initial acceleration, and overall average velocity. Structurally, they eliminate the need for complex mechanical transmission and energy storage systems, resulting in a simpler structure and fewer potential points of failure. Furthermore, the motion of electromagnetic repulsion mechanisms is unaffected by changes in the magnitude of external short-circuit current, exhibiting low dispersion and high operational reliability. Therefore, electromagnetic repulsion mechanisms are better suited to meet the requirements of circuit breakers for rapid and reliable mechanical switching.

[0004] However, current research on electromagnetic repulsion mechanisms mostly focuses on the characteristics of the mechanism itself, neglecting its actual application scenarios and compatibility with gas-insulated switchgear. For example, it is impossible to achieve linkage / interlocking of other equipment in the switchgear when the electromagnetic repulsion mechanism is opened or closed, thus failing to achieve a more efficient and safer use scenario. Summary of the Invention

[0005] This invention provides an integrated electromagnetic repulsion mechanism and interlocking device for gas-filled cabinets. When the electromagnetic repulsion mechanism is tripped, it can unlock the restriction on the three-position operating mechanism. At the same time, it locks the lower door interlocking rod to prevent the lower door from opening. Through the interlocking action between the various mechanisms, it makes the use more convenient and safer.

[0006] An integrated electromagnetic repulsion mechanism and interlocking device for a gas-insulated switchgear includes a repulsion mechanism frame, a circuit breaker located at the rear of the repulsion mechanism frame, a three-position operating mechanism mounted above the repulsion mechanism frame, and an electromagnetic repulsion mechanism, a tripping assembly, and a lower door interlocking assembly installed within the repulsion mechanism frame. The electromagnetic repulsion mechanism includes a repulsion disc assembly, which can move back and forth to generate displacement, thereby driving the main switch of the gas-insulated switchgear circuit breaker to perform opening and closing actions. The three-station operating mechanism includes an operating lever, the lower part of which is provided with a limiting groove; a gate spring baffle is fixedly connected to the front side of the repulsion disk assembly, an interlocking plate is fixedly connected to the front side of the gate spring baffle, the interlocking plate extends upward to the top of the repulsion mechanism frame and is movably engaged in the limiting groove. The lower door interlock assembly includes a lower door interlock rod that runs through both the upper and lower ends of the repulsion mechanism frame. An interlocking limiting shaft is fixedly connected to the lower door interlock rod, and the interlocking limiting shaft is located below the interlock plate. The tripping assembly is located in front of the electromagnetic repulsion mechanism. The tripping assembly includes a tripping shaft, on which a tripping lever and a tripping pressure plate are fixedly mounted. A tripping button that is hinged to the frame of the repulsion mechanism is provided above the tripping pressure plate. The tripping lever is located behind the tripping spring baffle. Pressing the trip button rotates the tripping shaft, which in turn moves the tripping lever forward to push the tripping spring baffle, thus tripping the main switch of the circuit breaker. At the same time, the interlocking plate moves forward and abuts against the interlocking limit shaft, restricting the lower door interlocking rod from moving upward. The upper end of the interlocking plate disengages from the limit groove, and the operating lever can move left and right to operate the three-position operating mechanism.

[0007] Furthermore, it also includes an indicator assembly, which includes a mounting shaft on which an indicator plate, a torsion spring, and an indicator rotating plate are fixedly connected. The indicator rotating plate is located in front of the trip spring baffle. A first connecting rod is fixedly connected to the indicator rotating plate, and a second connecting rod is hinged to the end of the first connecting rod. The end of the second connecting rod is connected to a counter.

[0008] Furthermore, a tripping limit baffle is fixed on the tripping shaft, and an interlocking limit plate is fixed on the lower door interlocking rod at the corresponding position below the tripping limit baffle.

[0009] Furthermore, the three-position operating mechanism is also equipped with a grounding limit plate, and the top of the lower door interlocking rod is located below the grounding limit plate, where a grounding limit block is fixed.

[0010] Furthermore, a torsion spring capable of resetting the tripping shaft is also installed on the tripping shaft.

[0011] Furthermore, the tripping shaft is rotatably mounted on the repulsion mechanism frame via a bushing, and a shaft support plate is supported in the middle of the tripping shaft.

[0012] Furthermore, a gate-opening compression spring is connected between the repulsion disk assembly and the gate-opening spring baffle.

[0013] Furthermore, a slider is fixed to the side of the interlocking plate, and a groove extending in the front-back direction is provided on the lower part of the top plate of the repulsion mechanism frame at the corresponding position of the slider, so that the slider can slide back and forth in the groove.

[0014] In summary, the present invention has the following beneficial effects: 1. When the electromagnetic repulsion mechanism is in the open state, the top of the interlock plate disengages from the limit slot on the operating lever and no longer limits the three-position operating mechanism. The operating lever can be manually moved left and right to operate the three-position operating mechanism. At the same time, the bottom of the interlock plate moves above the interlock limit shaft, thus preventing the interlock limit shaft from moving upward and limiting the lower door interlock rod. This ensures that the lower door interlock rod cannot be operated when the electromagnetic repulsion mechanism is open, thereby preventing the lower door of the gas cabinet from being opened, preventing accidental entry into the energized compartment, and making the use safer.

[0015] 2. When the electromagnetic repulsion mechanism is in the closed state, the bottom of the interlocking plate is misaligned with the interlocking limit shaft, and no longer limits the lower door interlocking rod; at the same time, in this state, when the three-position operating mechanism is in the grounded position, the grounding limit plate is misaligned with the grounding limit block, and the lower door interlocking rod can be manually moved upward to open the lower door of the gas cabinet. When the lower door interlock rod moves up and the lower door opens, the interlock limit plate moves up simultaneously to block the trip limit baffle, preventing it from rotating counterclockwise, thereby restricting manual tripping operation and preventing the gas cabinet grounding status from failing when the lower door is opened; At the same time, the top of the interlock plate enters the limit groove on the operating lever, which acts as a limit and prevents the operating lever from moving left or right, thus preventing the operation of the three-position operating mechanism and preventing the opening and closing of the three-position disconnect switch under load.

[0016] 3. An indicator component is provided. The indicator sign follows the movement of the repulsion disk component and displays "close" or "separate" accordingly for easy observation.

[0017] 4. The device is also equipped with a counter, which is linked to the device to record the number of times the electromagnetic repulsion mechanism opens and closes. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the lower door interlock component structure; Figure 3 This is a schematic diagram of the repulsion mechanism frame structure; Figure 4 This is a schematic diagram of the electromagnetic repulsion mechanism. Figure 5 A schematic diagram of the electromagnetic repulsion mechanism and its interlocking device; Figure 6 for Figure 5 The right view; Figure 7 This is a schematic diagram of the tripping component structure; Figure 8 This is a schematic diagram of the component structure; Figure 9 This is a schematic diagram showing the installation position of the interlocking plate slider; Figure 10 for Figure 9 Enlarged view of point A in the middle.

[0019] In the diagram: 1-Repulsion mechanism frame, 101-Frame side plate, 102-Frame bottom plate, 103-Frame top plate, 104-Frame rear plate, 105-Frame middle plate, 106-Frame limit plate; 107-Slide groove; 2-Three-position operating mechanism, 201-Operating lever, 202-Grounding limit plate, 2011-Limit groove; 3-Sealed mounting plate; 4-Electromagnetic repulsion mechanism, 401-Repulsion disk assembly, 402-Break-off spring, 403-Break-off spring baffle, 404-Support plate; 5-Repulsion mechanism frame panel; 6-Break-off assembly, 601-Break-off shaft, 602-Break-off lever, 603-Shaft support Support plate, 604-Closing pressure plate, 605-Closing button, 606-Closing limit baffle, 607-Closing torsion spring, 608-Hand sleeve, 609-Torsion spring limit screw; 7-Indicator assembly, 701-Indicator sign, 702-Mounting shaft, 703-Torsion spring, 704-Limit pin, 705-First connecting rod, 706-Second connecting rod, 707-Counter, 7011-Indicator rotating plate; 8-Lower door interlock assembly, 801-Lower door interlock rod, 802-Interlock limit plate, 803-Grounding limit block, 804-Interlock limit shaft; 9-Bellow pipe; 10-Screw; 11-Interlock plate; 1101-Slider. Detailed Implementation

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] The orientations mentioned in this specification are based on the orientation of the integrated electromagnetic repulsion mechanism and interlocking device for the gas-filled cabinet of the present invention during normal operation, and do not limit the orientation during storage and transportation. They only represent relative positional relationships and do not represent absolute positional relationships.

[0022] like Figures 1 to 8 As shown, this embodiment provides an integrated electromagnetic repulsion mechanism and interlocking device for a gas-insulated switchgear, including a repulsion mechanism frame 1, a three-position operating mechanism 2, a sealing mounting plate 3, an electromagnetic repulsion mechanism 4, a repulsion mechanism frame panel 5, a tripping assembly 6, an indicator assembly 7, a lower door interlocking assembly 8, a bellows 9, a screw 10, and an interlocking plate 11; the repulsion mechanism frame 1 and the three-position operating mechanism 2 are fixedly installed on the sealing mounting plate 3, with the three-position operating mechanism 2 located above the repulsion mechanism frame 1.

[0023] like Figure 3 As shown, the repulsion mechanism frame 1 is composed of frame side plate 101, frame bottom plate 102, frame top plate 103, frame rear plate 104, frame middle plate 105 and frame limiting plate 106, which are formed into a fixed frame by welding or assembly.

[0024] like Figure 4 As shown, the electromagnetic repulsion mechanism 4 includes a repulsion disk assembly 401, a tripping spring 402, a tripping spring baffle 403, and a support plate 404. The repulsion disk assembly 401 can move back and forth relative to the support plate 404. When closing the circuit, the repulsion disk assembly 401 moves to the right. Figure 4 At the position shown, the repulsion plate assembly 401 moves to the left when the circuit breaker is opened. The opening spring baffle 403 is fixedly connected to the repulsion plate assembly 401.

[0025] like Figure 5 , Figure 6 As shown, the electromagnetic repulsion mechanism 4 is fixedly installed on the repulsion mechanism frame 1, with one unit installed for each of the three phases (A, B, and C). The electromagnetic repulsion mechanism 4 is fixedly connected to the bellows 9 via the screw 10, and the bellows 9 is connected to the circuit breaker switch of the environmentally friendly gas-filled cabinet. The tripping assembly 6 is installed on the frame base plate 102, the indicating assembly 7 is installed on the frame side plate 101, and the lower door interlock assembly 8 is installed on the frame base plate 102 and the frame top plate 103.

[0026] like Figure 7 As shown, the tripping assembly 6 includes a tripping shaft 601, a tripping lever 602, a shaft support plate 603, a tripping pressure plate 604, a tripping button 605, a tripping limit baffle 606, a tripping torsion spring 607, a bushing 608, and a torsion spring limit screw 609. The tripping lever 602 and the tripping pressure plate 604 are fixedly connected to the tripping shaft 601 by a flat key and can rotate with the tripping shaft 601. The bushings 608 are installed on the frame side plate 101 and the shaft support plate 603, totaling 4 pieces, which support the tripping shaft 601 and reduce friction, allowing the tripping shaft 601 to rotate smoothly.

[0027] like Figure 7 As shown, the torsion spring limiting screw 609 is fixedly installed on the frame limiting plate 106. The tripping torsion spring 607 passes through the tripping shaft 601, with one end abutting against the torsion spring limiting screw 609 and the other end abutting against the tripping pressure plate 604. The tripping button 605 is hinged to the repulsion mechanism frame panel 5 and is limited by the repulsion mechanism frame panel 5. Pressing the tripping button 605 can drive the tripping pressure plate 604 to rotate counterclockwise. When the tripping button 605 is released, the tripping pressure plate 604 rotates clockwise under the action of the tripping torsion spring 607, causing the tripping button 605 to reset.

[0028] like Figure 8As shown, the indicator assembly 7 includes an indicator plate 701, a mounting shaft 702, a torsion spring 703, a limit pin 704, a first connecting rod 705, a second connecting rod 706, a counter 707, and an indicator limit screw. The mounting shaft 702, the counter 707, and the indicator limit screw are fixedly mounted on the frame side plate 101. The limit pin 704 is fixedly mounted on the mounting shaft 702. The indicator plate 701 passes through the mounting shaft 702 and can rotate around it. The torsion spring 703 passes through the mounting shaft 702, with one end abutting the edge of the indicator plate 701 and the other end abutting the limit pin 704. The indicator plate 701 has an indicator rotating plate 7011 and the words "separate" and "closed" are also provided.

[0029] like Figure 8 As shown, when the switch is in the closed state, the repulsion disk assembly 401 is not in contact with the indicator rotary plate 7011, and the indicator plate 701 is pressed down under the action of the torsion spring 703, displaying "Closed" through the observation window on the repulsion mechanism frame panel 5. When the switch is in the open state, the repulsion disk assembly 401 moves forward and presses against the indicator rotary plate 7011, causing the indicator plate 701 to rotate clockwise, displaying "Open" through the observation window on the repulsion mechanism frame panel 5.

[0030] like Figure 8 As shown, the electromagnetic repulsion mechanism 4 performs opening and closing actions, which drives the indicator plate 7011 to rotate. The indicator plate 7011 is connected to the counter 707 through the first link 705 and the second link 706. The counter 707 records the number of opening and closing actions of the electromagnetic repulsion mechanism 4.

[0031] like Figure 2 As shown, the three-station operating mechanism 2 is equipped with an operating lever 201, and the operating lever 201 is equipped with a limiting groove 2011. The three-station operating mechanism 2 is also equipped with a grounding limiting plate 202.

[0032] like Figure 2 As shown, the lower door interlock assembly 8 includes a lower door interlock rod 801, an interlock limiting plate 802, a grounding limiting block 803, and an interlock limiting shaft 804. The lower door interlock rod 801 passes through the frame bottom plate 102 and the frame top plate 103, and can move up and down. The interlock limiting plate 802 and the interlock limiting shaft 804 are fixedly installed on the lower door interlock rod 801.

[0033] like Figure 2 As shown, an interlocking plate 11 is fixedly installed on a phase electromagnetic repulsion mechanism 4.

[0034] like Figure 9 and Figure 10As shown, a slider 1101 is fixedly provided on the side of the interlocking plate 11. A groove 107 extending in the front-back direction is provided at the lower part of the top plate 103 of the repulsion mechanism frame at the corresponding position of the slider 1101. The slider 1101 can slide back and forth in the groove 107, thereby limiting the movement range of the interlocking plate 11, preventing it from shaking or tilting, and ensuring that it can be smoothly locked into the limiting groove.

[0035] How to use: a. The repulsion disk assembly 401 in the electromagnetic repulsion mechanism 4 generates displacement through electric control, and drives the main switch of the gas-filled switchgear circuit breaker to perform opening and closing actions through the bellows 9.

[0036] b. When the gas-insulated switchgear circuit breaker needs to be manually tripped, press the tripping button 605 manually. This causes the tripping pressure plate 604 to rotate counterclockwise, the tripping shaft 601 to rotate counterclockwise, and the tripping lever 602 to rotate counterclockwise and contact the tripping spring baffle 403. This causes the tripping spring baffle 403 and the repulsion plate assembly 401 to displace by 1-2 mm. Due to the air gap created by the displacement, the electromagnetic attraction of the electromagnetic repulsion mechanism 4 weakens. The repulsion plate assembly 401 will move towards the front of the cabinet under the action of the tripping pressure spring 402, causing the main switch of the gas-insulated switchgear circuit breaker to trip. When the tripping button 605 is released, the tripping pressure plate 604 rotates clockwise under the action of the tripping torsion spring 607, causing the tripping button 605 to spring back and reset.

[0037] c. When the electromagnetic repulsion mechanism 4 is in the open state, the repulsion disk assembly 401 moves towards the front of the cabinet, causing the interlock plate 11 to move forward. At this time, the top of the interlock plate 11 disengages from the limit groove 2011 on the operating lever 201 and no longer serves as a limit. The operating lever 201 can be manually moved left and right to operate the three-position operating mechanism.

[0038] d. When the electromagnetic repulsion mechanism 4 is in the open state, the repulsion disk assembly 401 moves towards the front of the cabinet, causing the interlock plate 11 to move forward. At this time, the bottom of the interlock plate 11 moves above the interlock limit shaft 804, thus preventing the interlock limit shaft 804 from moving upward, thereby limiting the lower door interlock rod 801, realizing the function of the lower door interlock rod being inoperable when the electromagnetic repulsion mechanism is open, and thus preventing the lower door of the gas cabinet from being opened, preventing accidental entry into the energized compartment.

[0039] e. When the electromagnetic repulsion mechanism 4 is in the closed state, the repulsion disk assembly 401 moves towards the rear of the cabinet, causing the interlock plate 11 to move backward. At this time, the bottom of the interlock plate 11 is misaligned with the interlock limit shaft 804 and no longer serves as a limit. At the same time, in this state, when the three-position operating mechanism 2 is in the grounded position, the grounding limit plate 202 is misaligned with the grounding limit block 803, and the lower door interlock rod 801 can be manually moved upward to open the lower door of the gas cabinet.

[0040] f. When the lower door interlocking rod 801 moves upward and the lower door is opened, the interlocking limit plate 802 moves upward simultaneously to abut against the tripping limit baffle 606, preventing it from rotating counterclockwise, thereby restricting manual tripping operation and preventing the gas cabinet grounding status from failing when the lower door is opened.

[0041] g. When the electromagnetic repulsion mechanism 4 is in the closed state, the repulsion disk assembly 401 moves towards the rear of the cabinet, causing the interlocking plate 11 to move backward. At this time, the top of the interlocking plate 11 enters the limit groove 2011 on the operating lever 201, which plays a limiting role. The operating lever 201 cannot move left or right, and the three-position operating mechanism cannot be operated, thus preventing the opening and closing of the three-position isolating switch under load.

[0042] h. When the switch is in the closed state, the repulsion disk assembly 401 is not in contact with the indicator rotary plate 7011, and the indicator plate 701 is pressed down under the action of the torsion spring 703, displaying "Closed" through the observation window on the repulsion mechanism frame panel 5. When the switch is in the open state, the repulsion disk assembly 401 moves forward and presses against the indicator rotary plate 7011, causing the indicator plate 701 to rotate clockwise, displaying "Open" through the observation window on the repulsion mechanism frame panel 5. The electromagnetic repulsion mechanism 4 performs opening and closing actions, which drives the indicator plate 7011 to rotate. The indicator plate 7011 is connected to the counter 707 through the first link 705 and the second link 706. The counter 707 records the number of opening and closing actions of the electromagnetic repulsion mechanism 4.

[0043] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. An integrated electromagnetic repulsion mechanism and interlocking device for a gas-insulated cabinet, characterized in that, The device includes a repulsion mechanism frame, a circuit breaker is located at the rear of the repulsion mechanism frame, a three-position operating mechanism is installed above the repulsion mechanism frame, and an electromagnetic repulsion mechanism, a tripping assembly, and a lower door interlocking assembly are installed inside the repulsion mechanism frame; the electromagnetic repulsion mechanism includes a repulsion disk assembly, which can move back and forth to generate displacement, thereby driving the main switch of the gas-insulated switchgear circuit breaker to perform opening and closing actions; The three-station operating mechanism includes an operating lever, the lower part of which is provided with a limiting groove; a gate spring baffle is fixedly connected to the front side of the repulsion disk assembly, an interlocking plate is fixedly connected to the front side of the gate spring baffle, the interlocking plate extends upward to the top of the repulsion mechanism frame and is movably engaged in the limiting groove. The lower door interlock assembly includes a lower door interlock rod that runs through both the upper and lower ends of the repulsion mechanism frame. An interlocking limiting shaft is fixedly connected to the lower door interlock rod, and the interlocking limiting shaft is located below the interlock plate. The tripping assembly is located in front of the electromagnetic repulsion mechanism. The tripping assembly includes a tripping shaft, on which a tripping lever and a tripping pressure plate are fixedly installed. A tripping button that is hinged to the frame of the repulsion mechanism is provided above the tripping pressure plate. The tripping lever is located behind the tripping spring baffle. Pressing the trip button rotates the tripping shaft, which in turn moves the tripping lever forward to push the tripping spring baffle, thus tripping the main switch of the circuit breaker. At the same time, the interlocking plate moves forward and abuts against the interlocking limit shaft, restricting the lower door interlocking rod from moving upward. The upper end of the interlocking plate disengages from the limit groove, allowing the operating lever to move left and right for operation of the three-position operating mechanism.

2. The integrated electromagnetic repulsion mechanism and interlocking device for a gas-insulated cabinet according to claim 1, characterized in that, It also includes an indicator assembly, which includes a mounting shaft on which an indicator plate, a torsion spring, and an indicator rotating plate are fixedly connected. The indicator rotating plate is located in front of the trip spring baffle. A first connecting rod is fixedly connected to the indicator rotating plate, and a second connecting rod is hinged to the end of the first connecting rod. The end of the second connecting rod is connected to a counter.

3. The integrated electromagnetic repulsion mechanism and interlocking device for a gas-insulated cabinet according to claim 1, characterized in that, A tripping limit baffle is also fixed on the tripping shaft, and an interlocking limit plate is fixed on the lower door interlocking rod at the corresponding position below the tripping limit baffle.

4. The integrated electromagnetic repulsion mechanism and interlocking device for a gas-insulated cabinet according to claim 1, characterized in that, The three-position operating mechanism is also equipped with a grounding limit plate, and the top of the lower door interlocking rod is located below the grounding limit plate, where a grounding limit block is fixed.

5. The integrated electromagnetic repulsion mechanism and interlocking device for a gas-insulated cabinet according to claim 1, characterized in that, The tripping shaft is also equipped with a tripping torsion spring that can reset the tripping shaft.

6. The integrated electromagnetic repulsion mechanism and interlocking device for a gas-insulated cabinet according to claim 1, characterized in that, The left and right ends of the tripping shaft are rotatably mounted on the repulsion mechanism frame via bushings, and the middle of the tripping shaft is supported by a shaft support plate.

7. The integrated electromagnetic repulsion mechanism and interlocking device for a gas-insulated cabinet according to claim 1, characterized in that, A closing spring is connected between the repulsion disk assembly and the closing spring baffle.

8. The integrated electromagnetic repulsion mechanism and interlocking device for a gas-insulated cabinet according to claim 1, characterized in that, The interlocking plate has a slider fixed to its side, and the lower part of the top plate of the repulsion mechanism frame has a groove extending in the front-back direction at the corresponding position of the slider, and the slider can slide back and forth in the groove.

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