A modular permanent magnet high voltage vacuum circuit breaker

Abstract

The present application discloses a modular permanent magnetic high-voltage vacuum circuit breaker, including an insulating frame for being placed inside a housing of a high-voltage vacuum power distribution device, wherein a plurality of mutually independent control mechanisms are arranged inside the insulating frame; the control mechanism includes a first socket and a second socket for plugging and cooperating with an external circuit, and the insulating frame is also provided with a plurality of permanent magnetic mechanisms respectively linked to respective control mechanisms, wherein the permanent magnetic mechanisms are used to switch on and off the power supply circuits of respective control mechanisms. The present application optimizes the layout of the vacuum circuit breaker, making the internal part of the vacuum circuit breaker more reasonable; when the control mechanism and / or permanent magnetic mechanism located inside the housing of the high-voltage vacuum power distribution device needs to be repaired, the control mechanism and / or permanent magnetic mechanism can be repaired more conveniently and quickly by removing the insulating frame as a whole from the housing of the high-voltage vacuum power distribution device.

Description

Technical Field

[0001] The invention relates to the field of circuit breakers, and in particular to a modular permanent magnet high-voltage vacuum circuit breaker. Background Art

[0002] The power industry is a key development industry in my country and has a very important impact on people's lives and production. In order to ensure the stability, safety and reliability of the power system operation, it is necessary to study the protection of generators and circuit breakers in the power system. A suitable coordination plan is needed between the two to promote the normal operation of the power grid. However, for most of the current outdated circuit breakers, it is obviously difficult to meet the current power operation requirements, and a lot of funds are needed for maintenance. If this continues, not only will the economic burden continue to increase, but the power operation will not be effectively guaranteed.

[0003] Permanent magnetic high voltage vacuum circuit breaker is a vacuum circuit breaker with permanent magnetic operating mechanism. In China, it is mainly used in lines with voltage levels of 12.5KV to 40.5KV. The permanent magnetic operating mechanism adopts permanent magnetic holding and electronic control. Compared with the traditional circuit breaker operating mechanism, the permanent magnetic mechanism adopts a brand-new working principle and structure. There is only one main moving part when working, no mechanical release and locking device is required, fewer fault sources, and higher reliability.

[0004] In some mining high-voltage vacuum power distribution devices, three-phase AC is usually used to power external motors. In order to ensure the safety of the three-phase AC power supply, a set of permanent magnetic high-voltage vacuum circuit breakers is usually installed in each phase AC power supply circuit. When any phase AC power supply circuit fails, the corresponding permanent magnetic high-voltage vacuum circuit breaker can disconnect the corresponding power supply circuit. Traditional permanent magnetic high-voltage vacuum circuit breakers are usually directly installed on the inner wall of the shell of the high-voltage vacuum power distribution device. When the permanent magnetic high-voltage vacuum circuit breaker needs to be repaired, it is difficult for maintenance personnel to repair the internal permanent magnetic high-voltage vacuum circuit breaker due to the limited internal space of the high-voltage vacuum power distribution device. Summary of the invention

[0005] In order to improve the problem that it is difficult for maintenance personnel to repair the internal permanent magnet high-voltage vacuum circuit breaker, the present application provides a modular permanent magnet high-voltage vacuum circuit breaker.

[0006] A modular permanent magnetic high-voltage vacuum circuit breaker comprises an insulating frame for being placed inside a housing of a high-voltage vacuum power distribution device, wherein a plurality of mutually independent control mechanisms are arranged inside the insulating frame; the control mechanism comprises a first socket and a second socket for plugging and cooperating with an external circuit, and a plurality of permanent magnetic mechanisms respectively linked to respective control mechanisms are arranged inside the insulating frame, wherein the permanent magnetic mechanisms are used to switch on and off power supply circuits of respective control mechanisms.

[0007] By adopting the above technical scheme, the present application optimizes the layout of the vacuum circuit breaker by arranging several groups of control mechanisms and permanent magnet mechanisms in the same insulating frame, making the internal part of the vacuum circuit breaker more reasonable; when it is necessary to repair the control mechanism and / or permanent magnet mechanism located inside the housing of the high-voltage vacuum power distribution device, by removing the insulating frame as a whole from the housing of the high-voltage vacuum power distribution device, it is more convenient and convenient to repair the control mechanism and / or permanent magnet mechanism; by arranging the control mechanism and the permanent magnet mechanism in the insulating frame, the insulating frame can provide a relatively stable working environment for the control mechanism and the permanent magnet mechanism, effectively reducing the adverse effects of the external environment on the control mechanism and the permanent magnet mechanism. When connecting the external circuit to the control mechanism, by inserting the plug arranged on the external circuit into the corresponding first socket or second socket respectively, the connection between the control mechanism and the external circuit is realized; the whole connection process is very convenient and fast.

[0008] Optionally, the control mechanism includes a vacuum tube and a load contact, the vacuum tube is close to the first socket, and one end of the vacuum tube is inserted into the first socket; the load contact is close to the second socket, and one end of the load contact is inserted into the second socket; a load copper busbar located in an insulating frame is arranged between the vacuum tube and the load contact, one end of the load copper busbar is connected to the load contact, and the other end of the load copper busbar is located between the permanent magnet mechanism and the vacuum tube.

[0009] By adopting the above technical solution, when the external circuit is disconnected from the control mechanism, the vacuum tube can achieve a better arc extinguishing effect, thereby effectively suppressing the generation of sparks and improving the safety of the control mechanism; when the permanent magnet mechanism changes from the open state to the closed state, the permanent magnet mechanism will push the load copper busbar to contact the vacuum tube, and the first socket and the second socket will be in a conducting state; when the permanent magnet mechanism changes from the closed state to the open state, the load copper busbar will be reset and separated from the vacuum tube, and the first socket and the second socket will be in a disconnected state.

[0010] Optionally, the insulating frame is provided with limiting grooves between the same group of vacuum tubes and the load contacts, and the load copper bars are arranged in respective limiting grooves; the load copper bars and the inner side walls of the limiting grooves are in contact with each other.

[0011] By adopting the above technical solution, when the load copper busbar is installed, since each limiting groove is relatively independent, by placing the load copper busbar in its own limiting groove, the creepage distance between adjacent load copper busbars can be increased under the action of the side walls of the limiting groove, thereby reducing the breakdown between adjacent load copper busbars when they are turned on; and by the mutual fit between the load copper busbar and the inner side wall of the limiting groove, the overall stability of the load copper busbar can be improved.

[0012] Optionally, a partition cover close to the load contact is arranged in the insulating frame, and the control mechanism also includes a varistor arranged in the partition cover, one end of the varistor is connected to the load contact, and the other end of the varistor is grounded.

[0013] By adopting the above technical solution, when the permanent magnet mechanism cuts off the power supply circuit of the control mechanism, the external circuit connected to the motor (or other load) will generate a large reverse current flowing into the load contact. At this time, the current will flow through the varistor connected to the load contact, part of the current will be consumed by the varistor, and the remaining current will eventually be grounded through the varistor. The setting of the varistor realizes the consumption of the reverse current at the moment of opening the switch, thereby protecting the internal control mechanism and the permanent magnet mechanism; the setting of the separation cover can separate the varistor from the external components, thereby reducing the adverse effects of the reverse current flowing into the varistor on the external components.

[0014] Optionally, a temperature sensor is provided on the vacuum tube, the input end of the temperature sensor is connected to the current input end of the vacuum tube, and the output end of the temperature sensor is used to connect to a temperature controller; a gate opening controller for controlling the opening and closing of the permanent magnetic mechanism is provided in the insulating frame, and the input end of the gate opening controller is used to receive a control signal issued by the temperature controller; the output end of the gate opening controller responds to the control signal issued by the temperature controller to output a gate opening signal to the permanent magnetic mechanism; after receiving the gate opening signal, the permanent magnetic mechanism disconnects the power supply circuit of the control mechanism.

[0015] By adopting the above technical solution, the temperature sensor is used to detect the temperature of the current input end of the vacuum tube. When the temperature detected by the temperature sensor exceeds the preset value of the temperature controller, the temperature controller will output a control signal to the trip controller. After receiving the control signal, the trip controller will send a trip signal to the permanent magnet mechanism, and finally the permanent magnet mechanism will disconnect the power supply circuit of the control mechanism. The temperature rise of the current input end of the control mechanism is monitored by the temperature sensor, and the power supply circuit of the control mechanism is automatically tripped when overheating occurs, thereby playing a role of over-temperature protection.

[0016] Optionally, a current transformer is provided on the load contact, and the current transformer is used to detect the current passing through the load contact; the output end of the current transformer is used to connect to the current controller, and convert the detected current into a corresponding current signal and output it to the current controller, and the input end of the disconnect controller is connected to the output end of the current controller, and is used to receive the control signal output by the current controller.

[0017] By adopting the above technical solution, the current transformer is used to convert the large primary current flowing through the load contact into a small secondary current to the current controller. When the current value detected by the current transformer is greater than the preset value of the current controller, it indicates that an overcurrent phenomenon has occurred. At this time, the output end of the current controller will output a corresponding control signal to the trip controller. After receiving the control signal, the input end of the trip controller will also output a trip signal to the permanent magnet mechanism. Finally, the permanent magnet mechanism can also control the power supply circuit of the mechanism to be disconnected, thereby achieving the effect of overcurrent protection.

[0018] Optionally, an insulator is provided between the vacuum tube and the permanent magnetic mechanism, one end of the insulator is linked to the permanent magnetic mechanism, and the other end of the insulator is connected to the load copper busbar.

[0019] By adopting the above technical solution, when the permanent magnetic mechanism changes from the open state to the closed state, the permanent magnetic mechanism will push the insulator to move in the direction close to the vacuum tube, and finally the insulator will push the load copper busbar to contact the vacuum tube, and then the power supply circuit of the control mechanism will be turned on; the insulator can also withstand voltage and mechanical stress, increase the creepage distance between the permanent magnetic mechanism and the vacuum tube, and reduce the electromagnetic interference between the permanent magnetic mechanism and the vacuum tube.

[0020] Optionally, a hand-opening connecting rod close to the permanent magnet mechanism is provided on the insulating frame, one end of the hand-opening connecting rod passes through the outer wall of the insulating frame, and the hand-opening connecting rod is provided with a plurality of hand-opening push blocks facing the respective permanent magnet mechanisms; a hand-opening swing rod for controlling the internal switching of the permanent magnet mechanism is provided on the permanent magnet mechanism, and the hand-opening swing rod is rotatably arranged outside the permanent magnet mechanism; the hand-opening push blocks are located on one side of the respective adjacent hand-opening swing rods, and the hand-opening push blocks are used to control the swing of the hand-opening swing rods.

[0021] By adopting the above technical solution, the hand-opening connecting rod that passes through the outer wall of the insulating frame is pressed into the insulating frame. At this time, the hand-opening push blocks arranged on the hand-opening connecting rod will push the adjacent hand-opening swing rods to swing. As the hand-opening swing rods swing, the hand-opening swing rods will push the permanent magnetic mechanisms in which they are located to achieve opening. At this time, the purpose of synchronously opening the permanent magnetic mechanisms inside the insulating frame is achieved, ensuring the consistency of the opening action.

[0022] Optionally, a spring is provided on the manual separation connecting rod, one end of the spring is connected to the inner wall of the insulating frame, and the other end of the spring is connected to the manual separation connecting rod; the spring expands and contracts along the sliding direction of the manual separation connecting rod.

[0023] By adopting the above technical solution, when the manual opening connecting rod completes the opening action of the permanent magnetic mechanism inside the insulating frame, the manual opening connecting rod will be reset under the action of the spring, thereby ensuring the smooth closing action of the subsequent permanent magnetic mechanism.

[0024] Optionally, a guide surface is provided on the side wall of the hand-separation pushing block facing away from the adjacent hand-separation rocker rod, and the guide surface is inclined in a direction approaching the spring.

[0025] By adopting the above technical solution, when the hand separation push block is reset together with the hand separation connecting rod under the action of the spring, the guide surface set on the hand separation push block can make the hand separation push block pass over the adjacent hand separation rocker rods more smoothly, ensuring the smooth reset of the hand separation push block.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] The layout of the vacuum circuit breaker is optimized, making the internal parts of the vacuum circuit breaker more reasonable; when the control mechanism and / or permanent magnet mechanism located inside the housing of the high-voltage vacuum distribution device needs to be repaired, the control mechanism and / or permanent magnet mechanism can be repaired more conveniently and quickly by removing the insulating frame as a whole from the housing of the high-voltage vacuum distribution device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0029] Figure 2 yes Figure 1 Schematic diagram of the local structure.

[0030] Figure 3 yes Figure 2 Schematic diagram of the local structure.

[0031] Figure 4 yes Figure 1 Schematic diagram of the local structural section.

[0032] Figure 5 It is prominent Figure 3 The partial structural diagram of the hand-release connecting rod is highlighted in the figure.

[0033] Description of reference numerals:

[0034] 1. Insulation frame; 10. Base; 101. Mounting seat; 11. Limiting groove; 12. Partition cover; 2. Control mechanism; 21. First socket; 22. Second socket; 23. Vacuum tube; 24. Load contact; 25. Load copper busbar; 26. Varistor; 27. Insulator; 3. Permanent magnet mechanism; 31. Permanent magnet cylinder; 32. Iron core; 33. First reset spring; 34. Second reset spring; 35. Manual separation sleeve; 36. Manual separation cylindrical pin; 4. Temperature sensor; 5. Disconnection controller; 6. Current transformer; 7. Manual separation connecting rod; 71. Manual separation push block; 72. Spring; 73. Guide surface; 8. Manual separation swing rod. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-5 This application is described in further detail.

[0036] The present application embodiment discloses a modular permanent magnet high voltage vacuum circuit breaker. Figure 1 , Figure 2 The modular permanent magnet high-voltage vacuum circuit breaker includes an insulating frame 1 for being placed inside the housing of a high-voltage vacuum power distribution device. The insulating frame 1 includes a base 10 with a hollow interior, and a plurality of mounting seats 101 arranged in sequence. The number of mounting seats 101 can be increased or decreased according to actual needs. In this embodiment, the number of mounting seats 101 is three groups. The lower ends of the three groups of mounting seats 101 are fixedly mounted in the base 10, and the upper ends of the mounting seats 101 extend out from the base 10.

[0037] like Figure 2 , Figure 3 As shown, three groups of control mechanisms 2 are installed in the insulating frame 1, which are respectively located in the corresponding mounting seats 101, and the three groups of control mechanisms 2 are independent of each other. Each group of control mechanisms 2 includes a first socket 21 and a second socket 22 for plugging and matching with an external circuit. The first socket 21 and the second socket 22 located on the same group of control mechanisms 2 are arranged side by side, and the first socket 21 and the second socket 22 are arranged on the side wall of the mounting seat 101 away from the base 10. Three groups of permanent magnet mechanisms 3 for respectively linking with the respective control mechanisms 2 are installed in the base 10, and the three groups of permanent magnet mechanisms 3 are used to respectively control the on and off of the power supply circuits of the respective control mechanisms 2.

[0038] like Figure 3 , Figure 4 As shown, the control mechanism 2 also includes a vacuum tube 23, a load contact 24 and a varistor 26. The length direction of the vacuum tube 23 extends along the height direction of the insulating frame 1, and the vacuum tube 23 is close to the first socket 21. One contact of the vacuum tube 23 passes through the mounting seat 101 into the first socket 21, and the contact of the vacuum tube 23 is located on the central axis of the first socket 21. The contact of the vacuum tube 23 located in the first socket 21 serves as an external power input terminal.

[0039] like Figure 3 , Figure 4As shown, the vacuum tube 23 is provided with a temperature sensor 4 located in the first socket 21, the input end of the temperature sensor 4 is connected to the contact of the vacuum tube 23, and the output end of the temperature sensor 4 is used to connect to the temperature controller. Three groups of gate opening controllers 5 are fixedly installed in the base 10, which are respectively located on one side of each permanent magnetic mechanism 3. The input end of the gate opening controller 5 is connected to the output end of the temperature controller corresponding to each, and the output end of the gate opening controller 5 is electrically connected to the permanent magnetic mechanism 3 corresponding to each. The temperature sensor 4 is used to detect the temperature of the current input end of the vacuum tube 23 where each is located. When the temperature detected by the temperature sensor 4 exceeds the preset value of the temperature controller, the temperature controller will output a control signal to the respective gate opening controller 5, and the output end of the gate opening controller 5 responds to the control signal sent by the temperature controller. After receiving the control signal, the gate opening controller 5 will send a gate opening signal to the permanent magnetic mechanism 3, and finally the permanent magnetic mechanism 3 will disconnect the power supply circuit of the control mechanism 2 where each is located.

[0040] like Figure 3 , Figure 4 As shown, the length direction of the load contact 24 also extends along the height direction of the insulating frame 1, the load contact 24 is close to the second socket 22, the upper end of the load contact 24 passes through the mounting seat 101 into the second socket 22, and the load contact 24 is located on the central axis of the second socket 22. The load contact 24 located in the second socket 22 serves as an external circuit output terminal.

[0041] like Figure 3 , Figure 4 As shown, the load contact 24 is provided with a current transformer 6 located in the second socket 22, and the current transformer 6 is used to detect the current passing through the load contact 24. The output end of the current transformer 6 is used to connect with the current controller, and convert the detected current into a corresponding current signal and output it to the current controller. The input end of the opening controller 5 is also connected to the output end of each current controller, and the opening controller 5 is used to receive the control signal output by the current controller. The current transformer 6 is used to convert the primary side large current flowing through the load contact 24 into a secondary side small current to the current controller. When the current value detected by the current transformer 6 is greater than the preset value of the current controller, it indicates that an overcurrent phenomenon has occurred. At this time, the output end of the current controller will output a corresponding control signal to the opening controller 5. After receiving the control signal of the current controller, the input end of the opening controller 5 will also output an opening signal to the permanent magnet mechanism 3. Finally, the permanent magnet mechanism 3 can also control the power supply circuit of each control mechanism 2 to be disconnected.

[0042] like Figure 3 , Figure 4As shown, the mounting seat 101 is also provided with a limiting groove 11 located between the vacuum tube 23 and the load contact 24 of the same group of control mechanism 2, and a load copper bar 25 is installed in the limiting groove 11. The limiting groove 11 is adapted to the load copper bar 25, and the load copper bar 25 and the inner side wall of the limiting groove 11 are mutually fitted. One end of the load copper bar 25 is connected to the load contact 24, and the other end of the load copper bar 25 passes through the limiting groove 11 and extends between the permanent magnet mechanism 3 and another group of contacts of the vacuum tube 23.

[0043] like Figure 3 , Figure 4 As shown, an insulator 27 is provided between the vacuum tube 23 and the permanent magnet mechanism 3, the lower end of the insulator 27 is linked with the permanent magnet mechanism 3, and the upper end of the insulator 27 is fixedly connected with the load copper bar 25. When the permanent magnet mechanism 3 is closed, the permanent magnet mechanism 3 will drive the insulator 27 and the load copper bar 25 to move toward the contact of the vacuum tube 23, and when the load copper bar 25 contacts the lower end contact of the vacuum tube 23, the external power input end and the external circuit output end are connected.

[0044] like Figure 3 , Figure 4 As shown, a partition cover 12 close to the load contact 24 is integrally formed in the mounting seat 101, and a varistor 26 is arranged in the partition cover 12. One end of the varistor 26 is connected to the adjacent load contact 24, and the other end of the varistor 26 is grounded through a cable.

[0045] like Figure 3 , Figure 4 As shown, the permanent magnet mechanism 3 includes a hollow permanent magnet cylinder 31, in which an iron core 32 is slidably arranged, and the upper end of the iron core 32 extends out of the permanent magnet cylinder 31 and is fixedly connected to the lower end of the insulator 27. A coil is also provided inside the permanent magnet mechanism 3 and is sleeved on the outside of the iron core 32. By energizing the coil, the magnetic force generated by the energized coil will drive the iron core 32 to move toward the insulator 27. When the load copper bar 25 contacts the lower end contact of the vacuum tube 23, the permanent magnet mechanism 3 completes the closing action, and then the power supply circuit of the coil is disconnected. Under the action of the magnetic force of the permanent magnet cylinder 31 itself, the iron core 32 will be adsorbed on the top of the inner wall of the permanent magnet cylinder 31. And the load copper bar 25 will maintain contact with the lower end contact of the vacuum tube 23.

[0046] like Figure 3 , Figure 4As shown, the permanent magnet mechanism 3 also includes a first return spring 33 and a second return spring 34 arranged on the permanent magnet cylinder 31. The first return spring 33 is located in the iron core 32, and the first return spring 33 is retracted along the sliding direction of the iron core 32. One end of the first return spring 33 is connected to the iron core 32, and the other end of the first return spring 33 is fixedly connected to the inner side wall of the permanent magnet cylinder 31. The second return spring 34 is located outside the permanent magnet cylinder 31, and the first return spring 33 and the second return spring 34 are coaxially arranged. The upper end of the second return spring 34 is connected to the outer side wall of the permanent magnet cylinder 31, and the lower end of the second return spring 34 is connected and fixed to the bottom wall of the base 10. When the permanent magnet mechanism 3 is in the closed state, the first return spring 33 is in a compressed state, and the first return spring 33 is used to apply a downward elastic force to the iron core 32; while the second return spring 34 is in a stretched state, and the second return spring 34 will apply a downward pulling force to the permanent magnet cylinder 31.

[0047] like Figure 3 , Figure 4 As shown, a manual separation connecting rod 7 located on the same side of the three groups of permanent magnet mechanisms 3 is movably provided on the base 10, and one end of the manual separation connecting rod 7 passes through the outer wall of the base 10. Three groups of manual separation push blocks 71 facing the respective permanent magnet mechanisms 3 are fixedly installed on the manual separation connecting rod 7. A manual separation sleeve 35 located on one side of the iron core 32 is rotatably provided on the outer wall of the permanent magnet cylinder 31, and the rotation axis of the manual separation sleeve 35 is perpendicular to the sliding direction of the iron core 32. A manual separation swing rod 8 parallel to the iron core 32 is fixedly installed on the manual separation sleeve 35, and a retreat groove is provided on the manual separation sleeve 35. A manual separation cylindrical pin 36 with the upper end inserted into the retreat groove is provided on the permanent magnet cylinder 31, and the lower end of the manual separation cylindrical pin 36 extends into the permanent magnet cylinder 31 and faces the internal iron core 32.

[0048] like Figure 4 , Figure 5 As shown, the manual separation swing rod 8 rotates with the manual separation sleeve 35 and is arranged outside the permanent magnet cylinder 31. The manual separation push blocks 71 are respectively located on one side of the respective adjacent manual separation swing rods 8, and the manual separation swing rods 8 are located on the sliding path of the respective manual separation push blocks 71. The manual separation connecting rod 7 located on the outer wall of the base 10 is pressed into the base 10. At this time, the manual separation push blocks 71 arranged on the manual separation connecting rod 7 will push the respective adjacent manual separation swing rods 8 to swing, and with the swing of the manual separation swing rod 8, the manual separation sleeve 35 will be driven to rotate. Subsequently, the upper end of the manual separation cylindrical pin 36 will withdraw from the retreat groove of the manual separation sleeve 35. At this time, the outer wall of the manual separation sleeve 35 will push the manual separation cylindrical pin 36 to further insert into the permanent magnet cylinder 31, and the manual separation cylindrical pin 36 will gradually push the iron core 32 to move in the direction away from the insulator 27, and the iron core 32 located in the permanent magnet cylinder 31 will gradually separate from the top inner wall of the permanent magnet cylinder 31. The magnetic force between the iron core 32 and the permanent magnet tube 31 will also gradually weaken. When the magnetic force between the iron core 32 and the permanent magnet tube 31 weakens to be smaller than the reset force of the first reset spring 33 and the second reset spring 34, the iron core 32 will be opened.

[0049] like Figure 3 , Figure 5 As shown, a spring 72 for resetting the hand separation link 7 is sleeved on the hand separation link 7, one end of the spring 72 is connected to the inner side wall of the base 10, and the other end of the spring 72 is connected and fixed to the hand separation link 7, and the spring 72 is extended and retracted along the sliding direction of the hand separation link 7. A guide surface 73 is provided on the side wall of the hand separation push block 71 away from the adjacent hand separation swing rod 8, and the guide surface 73 is inclined in the direction close to the spring 72.

[0050] The implementation principle of a modular permanent magnet high-voltage vacuum circuit breaker in the embodiment of the present application is:

[0051] The present application optimizes the layout of the vacuum circuit breaker by arranging several groups of control mechanisms 2 and permanent magnet mechanisms 3 in the same insulating frame 1, so that the internal part of the vacuum circuit breaker is more reasonable. When it is necessary to repair the control mechanism 2 and / or the permanent magnet mechanism 3 located inside the housing of the high-voltage vacuum power distribution device, the insulating frame 1 is removed from the housing of the high-voltage vacuum power distribution device as a whole, so that the control mechanism 2 and / or the permanent magnet mechanism 3 can be repaired more conveniently and quickly. By arranging the control mechanism 2 and the permanent magnet mechanism 3 in the insulating frame 1, the insulating frame 1 can provide a relatively stable working environment for the control mechanism 2 and the permanent magnet mechanism 3, effectively reducing the adverse effects of the external environment on the control mechanism 2 and the permanent magnet mechanism 3. When connecting the external circuit to the control mechanism 2, by inserting the plug arranged on the external circuit into the corresponding first socket 21 and the second socket 22 respectively, the connection between the control mechanism 2 and the external circuit is realized. The whole connection process is very convenient and fast.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A modular permanent magnet high voltage vacuum circuit breaker, characterized in that: The invention comprises an insulating frame (1) for being placed inside a housing of a high-voltage vacuum power distribution device, wherein a plurality of mutually independent control mechanisms (2) are arranged inside the insulating frame (1); the control mechanism (2) comprises a first socket (21) and a second socket (22) for plugging and cooperating with an external circuit, and the insulating frame (1) further comprises a plurality of permanent magnet mechanisms (3) respectively linked to the respective control mechanisms (2), wherein the permanent magnet mechanisms (3) are used to switch on and off the power supply circuits of the respective control mechanisms (2); The control mechanism (2) comprises a vacuum tube (23) and a load contact (24); the vacuum tube (23) is close to the first socket (21), and one end of the vacuum tube (23) is inserted into the first socket (21); the load contact (24) is close to the second socket (22), and one end of the load contact (24) is inserted into the second socket (22); a load copper busbar (25) located in the insulating frame (1) is arranged between the vacuum tube (23) and the load contact (24); one end of the load copper busbar (25) is connected to the load contact (24), and the other end of the load copper busbar (25) is located between the permanent magnet mechanism (3) and the vacuum tube (23); The control mechanism (2) further comprises a varistor (26) arranged in the partition cover (12), one end of the varistor (26) being connected to the load contact (24), and the other end of the varistor (26) being grounded; A temperature sensor (4) is provided on the vacuum tube (23), the input end of the temperature sensor (4) being connected to the current input end of the vacuum tube (23), and the output end of the temperature sensor (4) being used to be connected to a temperature controller; a switch-off controller (5) for controlling the opening and closing of the permanent magnet mechanism (3) is provided in the insulating frame (1), the input end of the switch-off controller (5) being used to receive a control signal sent by the temperature controller; the output end of the switch-off controller (5) responds to the control signal sent by the temperature controller to output a switch-off signal to the permanent magnet mechanism (3); and the permanent magnet mechanism (3) disconnects the power supply circuit of the control mechanism (2) after receiving the switch-off signal.

2. A modular permanent magnet high voltage vacuum circuit breaker according to claim 1, characterized in that: The insulating frame (1) is provided with a limiting groove (11) located between the vacuum tube (23) and the load contact (24) of the same group, and the load copper busbar (25) is arranged in the respective limiting groove (11); the load copper busbar (25) and the inner side wall of the limiting groove (11) are mutually fitted.

3. A modular permanent magnetic high voltage vacuum circuit breaker according to claim 1, characterized in that: A partition cover (12) close to the load contact (24) is arranged in the insulating frame (1).

4. A modular permanent magnet high voltage vacuum circuit breaker according to claim 1, characterized in that: A current transformer (6) is provided on the load contact (24), and the current transformer (6) is used to detect the current passing through the load contact (24); the output end of the current transformer (6) is used to connect to a current controller and convert the detected current into a corresponding current signal and output it to the current controller; the input end of the opening controller (5) is connected to the output end of the current controller and is used to receive the control signal output by the current controller.

5. The modular permanent magnet high voltage vacuum circuit breaker according to claim 1, characterized in that: An insulator (27) is provided between the vacuum tube (23) and the permanent magnet mechanism (3); one end of the insulator (27) is linked to the permanent magnet mechanism (3), and the other end of the insulator (27) is connected to the load copper bar (25).

6. A modular permanent magnetic high-voltage vacuum circuit breaker according to claim 1, characterized in that: The insulating frame (1) is provided with a hand-separation connecting rod (7) close to the permanent magnet mechanism (3), one end of the hand-separation connecting rod (7) passes through the outer wall of the insulating frame (1), and the hand-separation connecting rod (7) is provided with a plurality of hand-separation push blocks (71) facing the respective permanent magnet mechanisms (3); the permanent magnet mechanism (3) is provided with a hand-separation swing rod (8) for controlling the internal opening of the permanent magnet mechanism (3), and the hand-separation swing rod (8) is rotatably arranged outside the permanent magnet mechanism (3); the hand-separation push blocks (71) are located on one side of the respective adjacent hand-separation swing rods (8), and the hand-separation push blocks (71) are used to control the swing of the hand-separation swing rods (8).

7. A modular permanent magnetic high-voltage vacuum circuit breaker according to claim 6, characterized in that: The manual separation connecting rod (7) is provided with a spring (72), one end of the spring (72) is connected to the inner wall of the insulating frame (1), and the other end of the spring (72) is connected to the manual separation connecting rod (7); the spring (72) expands and contracts along the sliding direction of the manual separation connecting rod (7).

8. A modular permanent magnetic high-voltage vacuum circuit breaker according to claim 7, characterized in that: A guide surface (73) is provided on the side wall of the hand separation push block (71) facing away from the adjacent hand separation swing rod (8), and the guide surface (73) is inclined in a direction close to the spring (72).

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