A power distribution cabinet for circuit breaker with multi-node power-off function

Abstract

The present invention relates to the field of circuit breakers, and specifically discloses a power distribution cabinet for circuit breakers with a multi-node power-off function, including a cabinet, a rectangular mounting frame is slidably mounted at the inner center of the cabinet, a circuit breaker body is detachably mounted in the rectangular mounting frame, both ends of the circuit breaker body are electrically connected to wiring heads through the rectangular mounting frame, and a disconnection assembly is arranged at one end of the wiring head close to the circuit breaker body. Through the arrangement of an insulating heat-conducting plate, the heat generated inside the device can be conducted through the connection contacts and transferred to the insulating heat-conducting plate, and the insulating heat-conducting plate then guides the heat to the rectangular heat-conducting plate, so that the rectangular heat-conducting plate can effectively dissipate heat through the heat-conducting rod.

Description

Technical Field

[0001] The invention relates to a power distribution cabinet, in particular to a power distribution cabinet for a circuit breaker with a multi-node power-off function, belonging to the field of circuit breakers. Background Art

[0002] Circuit breakers are installed in distribution cabinets to protect circuit equipment. Circuit breakers are often connected to the lines between power sources and electrical equipment.

[0003] However, the existing distribution cabinets for circuit breakers with a multi-node power-off function still have certain defects when in use, especially for distribution cabinets used in some special situations, such as: sealed distribution cabinets. Distribution cabinets for circuit breakers with a multi-node power-off function used in such situations often have heat dissipation difficulties, and there are also many inconveniences when technicians perform closing and opening experiments on circuit breakers. Technicians need to open the distribution cabinet to perform closing and opening experiments on circuit breakers, which is very cumbersome and has certain safety risks. For this reason, we propose a distribution cabinet for circuit breakers with a multi-node power-off function. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a power distribution cabinet for a circuit breaker with a multi-node power-off function.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A power distribution cabinet for a circuit breaker with a multi-node power-off function comprises a cabinet body, a rectangular installation frame is slidably installed at the inner center of the cabinet body, a circuit breaker body is detachably installed in the rectangular installation frame, both ends of the circuit breaker body are electrically connected with terminal heads through the rectangular installation frame, a disconnecting assembly is arranged at one end of the terminal head close to the circuit breaker body, a heat dissipation assembly is movably abutted against the disconnecting assembly, a door panel is hingedly connected to one end of the cabinet body away from the disconnecting assembly, an air box is arranged at one end of the inner bottom of the cabinet body away from the door panel, a sealing air bag is connected to the air box, and the sealing air bag is arranged in the gap between the cabinet body and the door panel.

[0007] Preferably, the air box is internally slidably sleeved with a piston plate, and both ends of the piston plate on the side close to the door panel are fixedly connected with sliding rods, and a first through hole is provided on the sliding rod; a fixing frame is fixedly connected to the bottom side of the door panel, and a second through hole is provided on the fixing frame; the sliding rod and the fixing frame on the same side of the cabinet are transmission-connected via a U-shaped rod, and the two ends of the U-shaped rod are respectively inserted into the first through hole and the second through hole.

[0008] Preferably, a horizontal plate is fixedly sleeved at the middle sections of the two sliding rods, the two sliding rods are respectively sleeved on the two ends of the horizontal plate, the two ends of the top of the horizontal plate are fixedly connected with support rods, the end of the support rod away from the horizontal plate is fixedly connected to the rectangular mounting frame, and sliding rails are provided on the inner side wall panels of the cabinet, and sliding rods are fixedly connected on both sides of the rectangular mounting frame, and the two sliding rods are respectively slidably connected in the two sliding rails.

[0009] Preferably, both ends of the rectangular mounting frame away from the door panel are fixedly connected with electrical terminals, the two electrical terminals are electrically connected to the input terminal and the output terminal of the circuit breaker body respectively, and the two electrical terminals are electrically connected to the two wiring terminals respectively through the disconnecting assembly.

[0010] Preferably, the disconnector assembly includes connecting contacts electrically connected to the two electrical terminals and the two wiring terminals respectively, U-shaped insulating heat conducting plates are fixedly sleeved on the outside of the two connecting contacts, a plurality of connecting rods are fixedly connected between the two insulating heat conducting plates, a telescopic rod is fixedly connected to the top of the upper insulating heat conducting plate, a telescopic switch is fixedly connected to the outer wall panel of the cabinet, and the telescopic switch is electrically connected to the telescopic rod.

[0011] Preferably, the heat dissipation assembly includes a rectangular heat conducting plate movably abutted against the outer wall panels at both ends of the two insulating heat conducting plates, the rectangular heat conducting plate is embedded in the wall panels on both sides of the cabinet, and a plurality of heat conducting rods are fixedly connected to the side of the rectangular heat conducting plate away from the inside of the cabinet. The four rectangular heat conducting plates are respectively fixedly connected to four auxiliary support plates through the plurality of heat conducting rods, and grooves for assisting in fixing the cabinet are opened in the horizontal direction on the auxiliary support plates.

[0012] Preferably, two L-shaped plates are fixedly connected to the inner side wall plates of the cabinet respectively, and the inner side wall plates of the L-shaped plates abut against the bottom wall plate of the insulating heat conductive plate and the wall plate of the insulating heat conductive plate close to the door panel.

[0013] Preferably, the bottom of the sealed airbag is connected with a first U-shaped tube and a second U-shaped tube, the end of the first U-shaped tube away from the sealed airbag is connected with the air box and the connection point is located at the bottom of the side of the piston plate inside the air box close to the door panel, the end of the second U-shaped tube away from the sealed airbag is connected with the air box and the connection point is located at the bottom of the side of the piston plate inside the air box away from the door panel.

[0014] Preferably, a first one-way valve is arranged in the first U-shaped tube, a second one-way valve is arranged in the second U-shaped tube, an air inlet one-way valve is arranged on a side wall panel of the air box close to the door panel, and an air outlet solenoid valve is arranged at an end of the top of the air box away from the door panel. The air outlet solenoid valve is located directly above the connection point between the air box and the second U-shaped tube, and the air outlet solenoid valve is electrically connected to a valve switch, and the valve switch is fixedly connected to the side of the cabinet.

[0015] Preferably, a transparent observation window is provided on the door panel, a sealing ring is provided at the connection between the observation window and the door panel, and a sealing strip is provided on the side of the door panel away from the hinge between the door panel and the cabinet body.

[0016] Beneficial effects of the present invention:

[0017] 1. By setting up the insulating heat-conducting plate, the heat generated inside the device can be conducted through the connecting contacts and transferred to the insulating heat-conducting plate, which then guides the heat to the rectangular heat-conducting plate, so that the rectangular heat-conducting plate can effectively dissipate heat through the heat-conducting rod. In rainy weather, after the heat-conducting rod is exposed to rain, the evaporation of rainwater will also promote the heat dissipation of the device. In normal weather, the heat-conducting rod can also effectively dissipate heat for the device.

[0018] 2. Through the setting of the telescopic rod and the telescopic switch, when the technicians conduct the closing and opening experiments on the circuit breaker body, the technicians only need to observe and analyze the actions of the circuit breaker body through the observation window. On the one hand, the technicians can conduct effective closing and opening experiments on the circuit breaker body without opening the door panel, which greatly improves the safety of the technicians. On the other hand, by conducting the closing and opening experiments of the circuit breaker body directly in the cabinet, the accuracy of the experimental data can be ensured, so that the technicians can conduct effective experiments on the circuit breaker body in the application under the condition of safety guarantee, which greatly improves the reliability of the closing and opening experiments.

[0019] 3. By increasing the distance between the terminal head and the power connection head, the current on the terminal head can be further prevented from breaking through the air. By using the multi-node power-off method with the insulating heat-conducting plate and the rectangular mounting frame away from the terminal head, it can effectively ensure that the circuit breaker body will not be energized, thereby effectively ensuring the safety of the technicians' inspection and replacement of the circuit breaker body after opening the door panel.

[0020] 4. Through the arrangement of the horizontal plate and the rectangular mounting frame, the circuit breaker body can be moved to the door panel of the cabinet after the door panel is opened, which effectively avoids the situation that the technicians need to enter the cabinet to inspect and maintain the circuit breaker body because the circuit breaker body is located in the cabinet. The technicians can inspect, maintain and replace the circuit breaker body in a more spacious place, which greatly improves the work efficiency of the technicians. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the overall structure of the present invention after removing the door panel.

[0024] Figure 3 It is a schematic diagram of the installation structure of the rectangular installation frame of the present invention.

[0025] Figure 4 For the present invention Figure 3 An enlarged schematic diagram of the structure of section A is shown.

[0026] Figure 5 It is a schematic cross-sectional view of the structure of the insulating heat-conducting plate of the present invention.

[0027] Figure 6 It is a schematic diagram of the connection structure of the transverse plate of the present invention.

[0028] Figure 7 It is a schematic diagram of the installation structure of the connection contacts of the present invention.

[0029] In the figure: 1. cabinet; 2. door panel; 3. heat conducting rod; 4. auxiliary support plate; 5. rectangular heat conducting plate; 6. telescopic switch; 7. valve switch; 8. observation window; 9. rectangular mounting frame; 10. circuit breaker body; 11. L-shaped plate; 12. insulating heat conducting plate; 13. slide bar; 14. cross plate; 15. sealing air bag; 16. air box; 17. support rod; 18. slide bar; 19. U-shaped rod; 20. air inlet check valve; 21. air outlet solenoid valve; 22. telescopic rod; 23. connecting contact; 24. terminal; 25. electrical terminal; 26. slide rail; 28. first U-shaped tube; 29. ​​second U-shaped tube; 30. piston plate; 31. connecting rod; 32. fixing frame. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-7As shown, a power distribution cabinet for a circuit breaker with a multi-node power-off function includes a cabinet 1, a rectangular mounting frame 9 is slidably mounted at the inner center of the cabinet 1, a circuit breaker body 10 is detachably mounted in the rectangular mounting frame 9, both ends of the circuit breaker body 10 are electrically connected with a terminal 24 through the rectangular mounting frame 9, a disconnecting assembly is arranged at one end of the terminal 24 close to the circuit breaker body 10, a heat dissipation assembly is movably abutted against the disconnecting assembly, a door panel 2 is hingedly connected to one end of the cabinet 1 away from the disconnecting assembly, an air box 16 is arranged at one end of the inner bottom of the cabinet 1 away from the door panel 2, the air box 16 is connected to a sealing air bag 15, and the sealing air bag 15 is arranged at the gap between the cabinet 1 and the door panel 2. By setting the sealing air bag 15, the sealing of the cabinet 1 can be effectively ensured.

[0032] As a technical optimization solution of the present invention, the piston plate 30 is slidably sleeved inside the air box 16, and the two ends of the piston plate 30 on the side close to the door panel 2 are fixedly connected with a slide bar 18, and a first through hole is provided on the slide bar 18. A fixing frame 32 is fixedly connected to the bottom side of the door panel 2, and a second through hole is provided on the fixing frame 32. The slide bar 18 and the fixing frame 32 on the same side of the cabinet 1 are connected by a U-shaped rod 19, and the two ends of the U-shaped rod 19 are respectively inserted into the first through hole and the second through hole. The setting of the U-shaped rod 19 enables the door panel 2 to effectively drive the slide bar 18 to move when it is opened, so that the sealing airbag 15 can be effectively replenished with air, and the rectangular mounting frame 9 can move toward the direction of the door panel 2.

[0033] As a technical optimization solution of the present invention, the middle sections of the two slide bars 18 are fixedly sleeved with a horizontal plate 14, and the two slide bars 18 are respectively sleeved at the two ends of the horizontal plate 14, and the top two ends of the horizontal plate 14 are fixedly connected with support rods 17, and the end of the support rod 17 away from the horizontal plate 14 is fixedly connected to the rectangular installation frame 9, and the inner side wall panels of the cabinet 1 are provided with slide rails 26, and the two sides of the rectangular installation frame 9 are fixedly connected with slide bars 13, and the two slide bars 13 are respectively slidably connected in the two slide rails 26. The setting of the slide rails 26 and the slide bars 13 can effectively share the supporting force of the support rods 17 on the rectangular installation frame 9, and can also ensure that the rectangular installation frame 9 will not be offset or tilted.

[0034] As a technical optimization solution of the present invention, both ends of the rectangular installation frame 9 away from the door panel 2 are fixedly connected with electrical terminals 25, and the two electrical terminals 25 are respectively electrically connected to the input end and the output end of the circuit breaker body 10, and the two electrical terminals 25 are respectively electrically connected to the two wiring terminals 24 through the opening assembly. The upper wiring terminal 24 of the two wiring terminals 24 is electrically connected to one end of the power supply in the circuit, and the lower wiring terminal 24 is electrically connected to the electrical equipment.

[0035] As a technical optimization solution of the present invention, the switch-off assembly includes a connection contact 23 electrically connected to two electrical terminals 25 and two wiring terminals 24, respectively, and a U-shaped insulating heat-conducting plate 12 is fixedly sleeved on the outside of the two connection contacts 23, and a plurality of connecting rods 31 are fixedly connected between the two insulating heat-conducting plates 12, and a telescopic rod 22 is fixedly connected to the top of the insulating heat-conducting plate 12 located above, and a telescopic switch 6 is fixedly connected to the outer wall panel of the cabinet 1, and the telescopic switch 6 is electrically connected to the telescopic rod 22. The telescopic switch 6 is a contact switch, and when the telescopic switch 6 is pressed for the first time, the telescopic rod 22 contracts; when the telescopic switch 6 is pressed for the second time, the telescopic rod 22 extends; when the telescopic switch 6 is pressed for the third time, the telescopic rod 22 contracts; when the telescopic switch 6 is pressed for the fourth time, the telescopic rod 22 extends; and so on, and it can be used in multiple cycles.

[0036] As a technical optimization solution of the present invention, the heat dissipation assembly includes a rectangular heat conducting plate 5 that is movably connected to the outer side wall panels of the two ends of the two insulating heat conducting plates 12, and the rectangular heat conducting plate 5 is embedded in the two side wall panels of the cabinet 1. The side of the rectangular heat conducting plate 5 away from the inside of the cabinet 1 is fixedly connected with multiple heat conducting rods 3, and the four rectangular heat conducting plates 5 are respectively fixedly connected with four auxiliary support plates 4 through multiple heat conducting rods 3. The auxiliary support plates 4 are provided with grooves in the horizontal direction for auxiliary fixing of the cabinet 1. The setting of the groove enables the auxiliary support plate 4 to be clamped with the preset railing on the mounting frame, further ensuring the stability of the installation of the cabinet 1.

[0037] As a technical optimization solution of the present invention, two L-shaped plates 11 are fixedly connected to the inner side wall plates of the cabinet 1, and the inner side wall plates of the L-shaped plates 11 are in contact with the bottom wall plate of the insulating heat conductive plate 12 and the wall plate of the insulating heat conductive plate 12 close to the door panel 2. The insulating heat conductive plate 12 is an organic silicone thermal conductive glue, and the model of the organic thermal conductive glue is: Osbon 160 thermal conductive glue.

[0038] As a technical optimization solution of the present invention, the bottom of the sealed airbag 15 is connected with a first U-shaped tube 28 and a second U-shaped tube 29. The end of the first U-shaped tube 28 away from the sealed airbag 15 is connected with the airbox 16, and the connection is located at the bottom of the piston plate 30 inside the airbox 16 near the door panel 2. The end of the second U-shaped tube 29 away from the sealed airbag 15 is connected with the airbox 16, and the connection is located at the bottom of the piston plate 30 inside the airbox 16 away from the door panel 2. The air intake check valve 20 provided on the side of the airbox 16 near the door panel 2 allows external gas to enter the chamber inside the airbox 16 near the piston plate 30 near the door panel 2. When the door panel 2 is closed, the chamber inside the airbox 16 near the piston plate 30 near the door panel 2 can effectively replenish gas to the chamber inside the airbox 16 near the piston plate 30 near the door panel 2 through the air intake check valve 20.

[0039] As a technical optimization solution of the present invention, a first one-way valve is arranged in the first U-shaped tube 28, a second one-way valve is arranged in the second U-shaped tube 29, an inlet one-way valve 20 is arranged on a side wall plate of the air box 16 close to the door panel 2, and an outlet solenoid valve 21 is arranged at one end of the top of the air box 16 away from the door panel 2. The outlet solenoid valve 21 is located just above the connection between the air box 16 and the second U-shaped tube 29, and the outlet solenoid valve 21 is electrically connected to the valve switch 7, and the valve switch 7 is fixedly connected to the side of the cabinet 1. The first one-way valve allows the gas in the air box 16 to enter the sealed air bag 15 only, and the second one-way valve is an air pressure one-way valve. The second one-way valve is set with an air pressure preset value. When the air pressure in the sealed air bag 15 is higher than the preset value, the second one-way valve will open, so that the gas in the sealed air bag 15 enters the air box 16 through the second U-shaped tube 29. When the air pressure in the sealed air bag 15 is lower than the preset value, the second one-way valve is in a closed state.

[0040] As a technical optimization solution of the present invention, a transparent observation window 8 is provided on the door panel 2, a sealing ring is provided at the connection between the observation window 8 and the door panel 2, and a sealing strip is provided on the side of the door panel 2 away from the hinge between the door panel 2 and the cabinet body 1. The provision of the sealing ring and the sealing strip further ensures the sealing of the cabinet body 1 and prevents external gas from entering the cabinet body 1.

[0041] The distribution cabinet is often installed on a preset mounting frame between two utility poles and the distribution cabinet is often set under the transformer. Therefore, when installing the distribution cabinet, the mounting frame for installing the distribution cabinet is often pre-fixed on the utility pole. At the same time, in order to ensure the safety of electricity use and the convenience of maintenance of the distribution cabinet, a circle of guardrails is often fixed around the laid mounting frame.

[0042] When the present invention is used, the cabinet 1 is installed on the mounting frame preset between two electric poles, and then the groove opened on the auxiliary support plate 4 is abutted against the guardrail set around the mounting frame to support the cabinet 1, thereby improving the stability of the cabinet 1 and preventing the risk of the cabinet 1 from tipping over and shaking. After the cabinet 1 is fixed, the door panel 2 is closed so that the device can be effectively sealed and operated. When the circuit breaker body 10 is in operation, the circuit breaker body 10, the connection contacts 23, the wiring terminals 24 and the connection terminals 25 will generate a certain amount of heat due to the current, so it is necessary to dissipate heat for the device. The heat is conducted through the connection contacts 23 and is conducted to the insulating heat conducting plate 12. The insulating heat conducting plate 12 then guides the heat to the rectangular heat conducting plate 5, so that the rectangular heat conducting plate 5 can effectively dissipate heat through the heat conducting rod 3. In addition, in rainy weather, after the heat conducting rod 3 is rained on, the evaporation of rainwater will also promote the heat dissipation of the device. In normal weather, the heat conducting rod 3 can also effectively dissipate heat for the device.

[0043] When it is necessary to conduct a closing and opening test on the circuit breaker body 10, the technician does not need to open the door panel 2. In the opening test, the telescopic switch 6 is pressed to shrink the telescopic rod 22. The shrinkage of the telescopic rod 22 drives the insulating heat conductive plate 12 to move upward, and then the insulating heat conductive plate 12 drives the connecting contact 23 to move upward, so that the connection between the connecting contact 23 and the wiring head 24 and the electrical connection head 25 is disconnected, so that the circuit breaker body 10 is effectively disconnected. In the closing test, the telescopic switch 6 is pressed again to extend the telescopic rod 22. The extension of the telescopic rod 22 drives the insulating heat conductive plate 12 to move downward, and then the insulating heat conductive plate 12 drives the connecting contact 23 to move downward, so that the electrical connection between the connecting contact 23 and the wiring head 24 and the electrical connection head 25 is re-established, so that the circuit breaker body 10 is reconnected to the circuit. In this process, the technician only needs to observe and analyze the action of the circuit breaker body 10 through the observation window 8. On the one hand, the technician can perform effective closing and opening experiments on the circuit breaker body 10 without opening the door panel 2, which greatly improves the safety of the technician. On the other hand, by directly performing the closing and opening experiments of the circuit breaker body 10 in the cabinet 1, the accuracy of the experimental data can be ensured, so that the technician can perform effective experiments on the circuit breaker body 10 in the application under the condition of safety guarantee, which greatly improves the reliability of the closing and opening experiments.

[0044] When the circuit breaker body 10 needs to be repaired and replaced, the telescopic switch 6 is pressed to disconnect the connection contact 23 from the terminal 24 and the power terminal 25 by the telescopic rod 22, so that the circuit breaker body 10 is in a non-powered state, and at this time, the insulating heat conductive plate 12 will block the front of the terminal 24 to prevent the current on the charged terminal 24 from breaking through the air, thereby threatening the personal safety of the technicians, thereby greatly ensuring the safety of the technicians. Then, by pressing the valve switch 7, the air outlet solenoid valve 21 is opened, so that the gas in the air box 16 located on the side of the piston plate 30 away from the door panel 2 flows into the cabinet 1, thereby effectively preventing the internal air pressure of the cabinet 1 from being lower than the external air pressure due to the thermal expansion and contraction of the internal gas of the cabinet 1, thereby causing the door panel 2 to be difficult to open. During the process of opening the door panel 2, the fixing frame 32 at the bottom of the door panel 2 will drive the slide bar 18 to move toward the direction close to the door panel 2 through the U-shaped rod 19, so that the slide bar 18 drives the piston plate 30 to move toward the door panel 2. After the door panel 2 opens a gap, the gas inside the cabinet 1 will flow relatively with the gas outside, so that the internal air pressure of the cabinet 1 is balanced with the external air pressure. At the same time, the U-shaped rod 19 drives the slide bar 18 to move, which can effectively prevent the door panel 2 from being ejected and opened due to the internal air pressure of the cabinet 1 being greater than the external air pressure, greatly improving the safety of opening the door panel 2.

[0045] During the opening process of the door panel 2, the gas in the chamber of the air box 16 located on the side of the piston plate 30 close to the door panel 2 will be replenished into the sealing air bag 15 through the first U-shaped tube 28 and the first one-way valve under the movement of the piston plate 30, thereby effectively ensuring the sealing of the sealing air bag 15 to the door panel 2. At the same time, after the air pressure inside the cabinet 1 is balanced with the external air pressure, the air outlet solenoid valve 21 is not closed at this time, so the chamber inside the air box 16 located on the side of the piston plate 30 away from the door panel 2 will be replenished with gas through the air outlet solenoid valve 21, absorbing the gas inside the cabinet 1. During this process, when the air pressure in the sealed airbag 15 is greater than a preset value, the second one-way valve arranged inside the second U-shaped tube 29 will discharge the box gas into the chamber inside the air box 16 located on the side of the piston plate 30 away from the door panel 2. On the one hand, it can effectively prevent the sealed airbag 15 from fatigue damage caused by excessive gas replenishment, thereby effectively improving the service life of the sealed airbag 15. On the other hand, the second U-shaped tube 29 can also effectively replenish air to the chamber inside the air box 16 located on the side of the piston plate 30 away from the door panel 2, thereby improving the air replenishment efficiency of the air outlet solenoid valve 21.

[0046] In the process of the fixed frame 32 driving the slide bar 18 to move toward the door panel 2, the slide bar 18 will also drive the rectangular mounting frame 9 to move toward the door panel 2 through the cross plate 14 and the support rod 17. The movement of the rectangular mounting frame 9 toward the door panel 2 can effectively drive the power terminal 25 away from the terminal 24 with points, and further prevent the current on the terminal 24 from breaking through the air by increasing the distance between the terminal 24 and the power terminal 25. By means of multi-node power-off away from the insulating heat conductive plate 12 and the rectangular mounting frame 9 from the terminal 24, it can effectively ensure that the circuit breaker body 10 will not be energized, thereby effectively ensuring the safety of the technician's inspection and replacement of the circuit breaker body 10 after opening the door panel 2. When the slide bar 18 drives the rectangular mounting frame 9 to move toward the door panel 2 through the cross plate 14 and the support rod 17, the slide bars 13 on both sides of the rectangular mounting frame 9 will slide in the slide rails 26, so that the rectangular mounting frame 9 drives the circuit breaker body 10 to move toward the direction close to the door panel 2, and then the circuit breaker body 10 moves to the door panel 2 of the cabinet 1 after the door panel 2 is opened, which effectively avoids the situation where the technicians need to enter the cabinet 1 to inspect and maintain the circuit breaker body 10 because the circuit breaker body 10 is located in the cabinet 1, so that the technicians can inspect, maintain and replace the circuit breaker body 10 in a more spacious place, which greatly improves the work efficiency of the technicians.

[0047] After the inspection, maintenance or replacement of the circuit breaker body 10 is completed, the outlet electromagnetic valve 21 is first closed through the valve switch 7, and then the door panel 2 is closed. During the closing process of the door panel 2, the door panel 2 will push the slide bar 18 to move away from the door panel 2 through the fixing frame 32 and the U-shaped rod 19, thereby resetting the rectangular mounting frame 9, and at the same time, the piston plate 30 will move away from the door panel 2. When the piston plate 30 moves away from the door panel 2, it will squeeze the gas in the chamber of the air box 16 located on the side of the piston plate 30 away from the door panel 2, so as to facilitate the smooth opening of the door panel 2 next time, and the door panel 2 will squeeze the sealing airbag 15 after closing, so that the door panel 2 and the sealing airbag 15 can effectively seal the cabinet 1. After the door panel 2 is closed, by pressing the telescopic switch 6, the telescopic rod 22 is extended, so that the electrical connector 25, the connecting contact 23 and the wiring connector 24 form a passage, so that the circuit breaker body 10 can work smoothly.

[0048] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A power distribution cabinet for a circuit breaker with a multi-node power-off function, comprising a cabinet body (1), characterized in that: A rectangular mounting frame (9) is slidably mounted at the inner center of the cabinet (1), a circuit breaker body (10) is detachably mounted in the rectangular mounting frame (9), both ends of the circuit breaker body (10) are electrically connected to wiring heads (24) through the rectangular mounting frame (9), a disconnecting assembly is arranged at one end of the wiring head (24) close to the circuit breaker body (10), the disconnecting assembly is movably abutted against a heat dissipation assembly, a door panel (2) is hingedly connected to one end of the cabinet (1) away from the disconnecting assembly, an air box (16) is arranged at one end of the inner bottom of the cabinet (1) away from the door panel (2), the air box (16) is connected to a sealing air bag (15), and the sealing air bag (15) is arranged at the gap between the cabinet (1) and the door panel (2); The air box (16) is internally slidably sleeved with a piston plate (30), and both ends of the piston plate (30) close to the door panel (2) are fixedly connected with a slide bar (18), and a first through hole is provided on the slide bar (18). A fixing frame (32) is fixedly connected to the bottom side of the door panel (2), and a second through hole is provided on the fixing frame (32). The slide bar (18) and the fixing frame (32) on the same side of the cabinet (1) are transmission-connected via a U-shaped rod (19), and both ends of the U-shaped rod (19) are respectively inserted into the first through hole and the second through hole.

2. A power distribution cabinet for a circuit breaker with a multi-node power-off function according to claim 1, characterized in that: A transverse plate (14) is fixedly sleeved at the middle sections of the two slide bars (18), the two slide bars (18) are respectively sleeved at the two ends of the transverse plate (14), the top two ends of the transverse plate (14) are fixedly connected with support rods (17), one end of the support rod (17) away from the transverse plate (14) is fixedly connected to the rectangular installation frame (9), and slide rails (26) are provided on the inner side wall panels of the cabinet (1), and the two sides of the rectangular installation frame (9) are fixedly connected with slide bars (13), and the two slide bars (13) are respectively slidably connected in the two slide rails (26).

3. A power distribution cabinet for a circuit breaker with a multi-node power-off function according to claim 1, characterized in that: Both ends of the rectangular installation frame (9) on one side away from the door panel (2) are fixedly connected with electrical connectors (25), the two electrical connectors (25) are respectively electrically connected to the input end and the output end of the circuit breaker body (10), and the two electrical connectors (25) are respectively electrically connected to the two wiring connectors (24) through the opening assembly.

4. A power distribution cabinet for a circuit breaker with a multi-node power-off function according to claim 3, characterized in that: The switch-off assembly comprises a connection contact (23) electrically connected to two electrical terminals (25) and two wiring terminals (24) respectively; a U-shaped insulating heat-conducting plate (12) is fixedly sleeved on the outside of the two connection contacts (23); a plurality of connection rods (31) are fixedly connected between the two insulating heat-conducting plates (12); a telescopic rod (22) is fixedly connected to the top of the insulating heat-conducting plate (12) located above; a telescopic switch (6) is fixedly connected to the outer wall plate of the cabinet (1); and the telescopic switch (6) is electrically connected to the telescopic rod (22).

5. A power distribution cabinet for a circuit breaker with a multi-node power-off function according to claim 4, characterized in that: The heat dissipation assembly comprises a rectangular heat conducting plate (5) movably abutting against the outer side wall plates at both ends of the two insulating heat conducting plates (12); the rectangular heat conducting plate (5) is embedded in the side wall plates of the cabinet (1); a plurality of heat conducting rods (3) are fixedly connected to the side of the rectangular heat conducting plate (5) away from the interior of the cabinet (1); the four rectangular heat conducting plates (5) are respectively fixedly connected to four auxiliary support plates (4) via the plurality of heat conducting rods (3); and grooves for auxiliary fixing of the cabinet (1) are provided in the auxiliary support plates (4) in the horizontal direction.

6. A power distribution cabinet for a circuit breaker with a multi-node power-off function according to claim 5, characterized in that: Two L-shaped plates (11) are fixedly connected to the inner side wall plates of the cabinet (1), respectively, and the inner side wall plates of the L-shaped plates (11) are in contact with the bottom wall plate of the insulating heat-conducting plate (12) and the wall plate of the insulating heat-conducting plate (12) close to the door plate (2).

7. A power distribution cabinet for a circuit breaker with a multi-node power-off function according to claim 1, characterized in that: The bottom of the sealing airbag (15) is connected to a first U-shaped tube (28) and a second U-shaped tube (29); one end of the first U-shaped tube (28) away from the sealing airbag (15) is connected to the air box (16), and the connection point is located at the bottom of a side of the piston plate (30) inside the air box (16) close to the door panel (2); the end of the second U-shaped tube (29) away from the sealing airbag (15) is connected to the air box (16), and the connection point is located at the bottom of a side of the piston plate (30) inside the air box (16) away from the door panel (2).

8. A power distribution cabinet for a circuit breaker with a multi-node power-off function according to claim 7, characterized in that: A first one-way valve is arranged in the first U-shaped tube (28), a second one-way valve is arranged in the second U-shaped tube (29), an air inlet one-way valve (20) is arranged on a side wall plate of the air box (16) close to the door panel (2), an air outlet solenoid valve (21) is arranged at the top end of the air box (16) away from the door panel (2), the air outlet solenoid valve (21) is located directly above the connection point between the air box (16) and the second U-shaped tube (29), and the air outlet solenoid valve (21) is electrically connected to a valve switch (7), and the valve switch (7) is fixedly connected to the side of the cabinet (1).

9. A power distribution cabinet for a circuit breaker with a multi-node power-off function according to claim 1, characterized in that: The door panel (2) is provided with a transparent observation window (8), a sealing ring is provided at the connection between the observation window (8) and the door panel (2), and a sealing strip is provided at one side of the door panel (2) away from the hinged connection between the door panel (2) and the cabinet body (1).

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