Circuit breaker core module of magnetic control mechanism and ring main unit based on module
By installing the circuit breaker core module of the magnetron mechanism inside the air box of the ring network cabinet, the magnetic force of the static iron core and the moving iron core maintains the opening and closing action, the existing permanent magnet actuator cannot work normally in high temperature and harsh environments. The problem of this is to achieve efficient and reliable circuit breaker operation.
Patent Information
- Application Number
- CN202421309344.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-06-11
AI Technical Summary
The performance of the existing permanent magnet actuator is affected in a high temperature environment, and is easily affected by environmental factors when installed on the outside of the ring-network cabinet air box, resulting in the inability to open and close the switch normally.
Design a circuit breaker core module of a magnetron mechanism, installed inside the ring cabinet air box, adopts a static iron core and a dynamic iron core to maintain the opening and closing action through magnetic force, and realize efficient circuit breaker operation in the vacuum arc extinguishing chamber .
It realizes reliable opening and closing operation of the circuit breaker under high temperature environment and harsh environmental conditions, improves the overall reliability and safety of the ring grid cabinet, and the demagnetization temperature of the magnetron mechanism is high, has strong adaptability to the environment and high stability.
Smart Images
Figure CN222530356U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ring network cabinets, in particular to a circuit breaker core module of a magnetic control mechanism and a ring network cabinet based on the module. Background Art
[0002] Ring main unit is a group of power transmission and distribution equipment, also known as high-voltage switchgear, with the advantages of simple structure, small size, low price, improved power supply parameters and performance, and power supply safety. It is widely used in distribution rooms and box-type substations in urban residential areas, high-rise buildings, factories and enterprises and other load centers. The life of the ring main unit is mainly reflected in the opening and closing actions of the contacts, which are realized by the mechanism. Therefore, the working performance and survival of the fittest of the operating mechanism play an extremely important role in the working performance and reliability of the ring main unit. At present, the operating mechanisms on the market mainly include electromagnetic operating mechanisms, spring operating mechanisms and permanent magnet operating mechanisms.
[0003] Electromagnetic operating mechanisms are gradually being eliminated by the market due to their stringent requirements on power supply, large impact during operation, and long operation time. Spring operating mechanisms are usually composed of spring energy storage, closing maintenance, opening maintenance, and opening. They have a large number of parts, a relatively complex structure, high processing precision requirements, and high manufacturing costs. In addition, the spring mechanism is installed on the outside of the ring network cabinet gas box and is easily affected by environmental factors (such as moisture, condensation, and salt spray) causing the mechanism to get stuck, resulting in mechanical failure and causing the operating mechanism to refuse to move, burning the closing coil or travel switch. The permanent magnet operating mechanism is a device that uses permanent magnetic materials to generate a magnetic field. It has a small number of parts and a relatively simple structure. However, the magnetism of the permanent magnet itself will change with changes in temperature, generally ranging from 60°C to 200°C. Therefore, the performance of the permanent magnet mechanism may be affected in a high temperature environment, and it is difficult to obtain ideal opening speed characteristics.
[0004] If the existing permanent magnetic operating mechanism is installed on the outside of the gas box, it is easily affected by environmental factors (such as moisture, condensation, and salt spray), resulting in the mechanism being unable to perform normal opening and closing operations; if it is installed inside the gas box, although the influence of environmental factors is avoided, when the temperature inside the gas box is too high, the performance of the permanent magnetic mechanism may be affected and become unusable. Therefore, there is an urgent need for a new type of magnetic control mechanism that uses a circuit breaker core module and is installed in the ring network cabinet gas box, so that it is not affected by environmental factors and can achieve reliable opening and closing operations with high control accuracy and stable performance.
[0005] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content
[0006] 1. Technical issues to be solved
[0007] In view of the deficiencies in the prior art, the utility model provides a circuit breaker core module of a magnetic control mechanism and a ring network cabinet based on the module, which have the advantages of high demagnetization temperature, strong environmental adaptability, high stability and simple structure, thereby solving the problem that if the existing permanent magnetic operating mechanism is installed on the outside of the gas box, it is easily affected by environmental factors, resulting in failure to open and close the switch normally; if it is installed inside the gas box, it is easily affected by the high temperature inside the gas box, resulting in the operating mechanism being unusable.
[0008] (II) Technical solution
[0009] In order to achieve the above advantages of high demagnetization temperature, strong environmental adaptability, high stability and simple structure, the specific technical solutions adopted by the utility model are as follows:
[0010] According to one aspect of the utility model, a circuit breaker core module of a magnetic control mechanism is provided. The circuit breaker core module of the magnetic control mechanism is installed inside the gas box of the ring network cabinet. The circuit breaker core module of the magnetic control mechanism includes a mounting plate arranged at one end of the inner side of the gas box, a transmission main shaft is penetrated through one side of the mounting plate, one end of the transmission main shaft is sleeved with a circuit breaker dynamic fit that matches the mounting plate, the other end of the transmission main shaft is provided with an L-shaped transmission main shaft guide plate, and the other end of the transmission main shaft is sleeved with a guide sleeve that matches the L-shaped transmission main shaft guide plate.
[0011] Furthermore, in order to achieve more efficient circuit breaker operation and arc extinguishing performance and improve the overall reliability and safety of the ring network cabinet, epoxy glass partitions are symmetrically arranged on both sides of the L-shaped transmission main shaft guide plate, a number of magnetic control mechanisms are penetrated through the top of the L-shaped transmission main shaft guide plate, and a number of opening and closing crank arms that cooperate with the magnetic control mechanisms are sleeved on the middle part of the transmission main shaft; an insulating pull rod is arranged at the bottom end of the magnetic control mechanism, a vacuum arc extinguishing chamber is arranged at the bottom end of the insulating pull rod, and a soft connector that cooperates with the epoxy glass partition is arranged at the moving end of the top of the vacuum arc extinguishing chamber; an arc extinguishing chamber guide plate connected to the epoxy glass partition is arranged at the top of the vacuum arc extinguishing chamber, an isolation module rear mounting plate is arranged on one side of the arc extinguishing chamber guide plate, an isolation module front mounting plate is arranged on the other side of the arc extinguishing chamber guide plate, and an isolation main shaft is arranged between the isolation module rear mounting plate and the isolation module front mounting plate, and a grounding component is arranged on one side of the isolation main shaft.
[0012] Furthermore, in order to achieve precise control of the opening and closing actions of the circuit breaker through the magnetic control mechanism, enhance the stability of operation and reduce mechanical wear, the magnetic control mechanism includes a static iron core arranged at the top of the L-shaped transmission main shaft guide plate, a driving rod is penetrated through the bottom end of the static iron core, a moving iron core matching the static iron core is sleeved on the outer side of the top of the driving rod, an opening spring is sleeved on the middle part of the driving rod, and a plurality of excitation coils are arranged on the top of the static iron core.
[0013] According to another aspect of the utility model, a ring main unit is also provided, which includes a cable box door, a cable box is arranged on one side of the cable box door, an air box is arranged on the top of the cable box, a mechanism box is arranged on one side of the air box, a control box is arranged on the top of the mechanism box, and a mechanism box panel is arranged on one side of the mechanism box.
[0014] Furthermore, in order to achieve good cable fixing, grounding and phase management and ensure the safety and reliability of cable access, cable box side panels are symmetrically arranged on both sides of the cable box, a vertical grounding bar is arranged at the top of one side of the cable box side panel, a horizontal grounding bar is arranged at the bottom of the vertical grounding bar, a cable fixing beam is arranged at the bottom end of one side of the cable box side panel, and a phase cable clamp is arranged in the middle of one side of the cable box side panel.
[0015] Furthermore, in order to achieve efficient busbar connection inside the gas box and the integration of the magnetic control mechanism circuit breaker core module, and to improve the electrical performance and expansion capability of the ring network cabinet, gas box side panels are symmetrically arranged on both sides of the gas box, a plurality of side expansion busbar sockets are arranged on the top of the gas box side panels, a magnetic control mechanism circuit breaker core module connected to the side expansion busbar sockets is arranged on the inner side of the gas box, a lower branch bus is arranged at the bottom end of the magnetic control mechanism circuit breaker core module, one end of the lower branch bus is arranged with an inlet and outlet line insulator, one end of the inlet and outlet line insulator is arranged with a three-phase integrated CT, and one end of the gas box is arranged with an gas box check valve.
[0016] Furthermore, in order to achieve convenience of operation and rapid response capability in emergency situations and enhance the efficiency of fault handling and maintenance of the ring network cabinet, an isolation operating mechanism is provided at the top of the inner side of the mechanism box, and an emergency tripping mechanism is provided at the top of the inner side of the mechanism box; a drive module box is provided at the top of the control box, a drive module box door panel is provided on one side of the drive module box, a drive module is provided in the middle of the inner side of the drive module box, a secondary wiring groove is provided on one side of the control box, and a control box door panel is provided on the other side of the control box; an infrared temperature measurement observation window is provided at the top of one side of the cable box door.
[0017] (III) Beneficial effects
[0018] Compared with the prior art, the utility model provides a circuit breaker core module of a magnetic control mechanism and a ring main unit based on the module, which has the following beneficial effects:
[0019] (1) The utility model has a reasonable and reliable structure. By adopting a circuit breaker core module with a magnetic control mechanism and installing it in the ring network cabinet gas box, the circuit breaker is not affected by the environment (such as condensation, salt spray, temperature, etc.), and has reliable operation, simple structure, fewer moving parts during operation, no need for mechanical tripping and locking devices, fewer fault sources, high mechanical reliability, and more stable performance. The magnetic control mechanism is convenient for adding an external trip lever, and the manual trip structure is simple.
[0020] (2) The utility model realizes the installation of the magnetic control mechanism on the top of the circuit breaker by setting a core module of the circuit breaker with a magnetic control mechanism. Each phase vacuum interrupter of the circuit breaker is separately equipped with a magnetic control mechanism. The driving rod of the magnetic control mechanism is directly connected to the moving end of the vacuum interrupter and moves vertically up and down. The transmission energy loss during the transmission process is low and the transmission efficiency is high. In addition, the inherent opening time of the circuit breaker does not exceed 5ms, the overall opening time is less than 15ms, and the magnetic holding force is strong.
[0021] (3) The core module of the circuit breaker with the magnetic control mechanism adopted by the utility model has a demagnetization temperature greater than or equal to 175°C, a high demagnetization temperature, strong adaptability to the environment, high stability, simple structure, basically no heat generation of the coil, high repeatability, and thus high control accuracy and long service life; at the same time, the power required for the action is small, which is convenient for designing batteries or supercapacitors that cannot be portable and driven, and can be driven more than 200 times after being fully charged.
[0022] (4) The circuit breaker core module of the magnetic control mechanism adopted by the utility model uses its own magnetic force to maintain the opening and closing of the circuit breaker. By controlling the excitation and demagnetization of the magnetic control material to change its internal magnetic domain, it is a controllable magnet, which is convenient for opening and closing operations. When closing the circuit breaker, the closing capacitor discharges to the coil to generate current, induces a magnetic field, and generates suction, and the circuit breaker is closed. When opening the circuit breaker, the opening capacitor generates a reverse discharge current, and the generated induced magnetic field is opposite to the magnetism of the iron core. The iron core is demagnetized and cannot continue to maintain the attracted state. The opening spring is activated to complete the opening of the circuit breaker. It has high stability and simple structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0024] Figure 1 It is a structural schematic diagram of a circuit breaker core module of a magnetic control mechanism according to an embodiment of the utility model;
[0025] Figure 2 It is a partial structural schematic diagram of a circuit breaker core module of a magnetic control mechanism according to an embodiment of the utility model;
[0026] Figure 3 is a structural schematic diagram of a circuit breaker core module of a magnetic control mechanism according to an embodiment of the utility model from another angle;
[0027] Figure 4 It is a structural schematic diagram of a magnetic control mechanism in a circuit breaker core module of a magnetic control mechanism according to an embodiment of the utility model;
[0028] Figure 5 It is a partial structural schematic diagram of a magnetic control mechanism in a circuit breaker core module of a magnetic control mechanism according to an embodiment of the utility model;
[0029] Figure 6 It is a structural schematic diagram of a ring main unit according to an embodiment of the utility model;
[0030] Figure 7 It is a partial structural schematic diagram of a ring main unit according to an embodiment of the utility model;
[0031] Figure 8 is a schematic structural diagram of a ring main unit according to an embodiment of the utility model from another angle;
[0032] Fig. 9 It is a structural schematic diagram of an isolation operating mechanism in a circuit breaker core module of a magnetic control mechanism according to an embodiment of the utility model;
[0033] Fig.10 It is a structural schematic diagram of an emergency tripping mechanism in a circuit breaker core module of a magnetic control mechanism according to an embodiment of the utility model.
[0034] In the figure:
[0035] 1. Mounting plate; 2. Circuit breaker dynamic coordination; 3. Drive main shaft; 4. Epoxy glass partition; 5. Switching arm; 6. Magnetic control mechanism; 601. Moving iron core; 602. Static iron core; 603. Driving rod; 604. Switching spring; 605. Excitation coil; 7. L-shaped drive main shaft guide plate; 8. Guide sleeve; 9. Insulating pull rod; 10. Soft connector; 11. Arc extinguishing chamber guide plate; 12. Vacuum arc extinguishing chamber; 13. Isolation module rear mounting plate; 14. Isolation main shaft; 15. Grounding assembly; 16. Isolation module front mounting plate; 17. Cable box; 18. Gas box; 19. Mechanism box; 20. Control box; 21. Mechanism box panel; 22. Cable box door; 23. Drive module box door panel; 24. Drive module; 25. Drive module box; 26. Secondary wiring trough; 27. Gas box side 1. The breaker core module of the magnetic control mechanism; 2. The lower branch bus; 3. The insulator of the incoming and outgoing lines; 3. The side panel of the cable box; 3. The vertical grounding bar; 3. The horizontal grounding bar; 3. The cable fixing beam; 3. The phase-separated cable clamp; 3. The infrared temperature observation window; 3. The three-phase integrated CT; 3. The isolation operating mechanism; 3901. The isolation main shaft; 3902. The grounding main shaft; 40. The emergency opening mechanism; 4001. The operating shaft; 4002. The operating shaft guide sleeve; 4003. The connecting main shaft; 4004. The rotating sleeve; 4005. The mounting plate; 4006. The reinforcement plate; 4007. The support rod; 4008. The interlocking plate; 4009. The counter; 4010. The guide plate; 41. The gas box check valve; 42. The control box door panel. DETAILED DESCRIPTION
[0036] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.
[0037] According to an embodiment of the utility model, a circuit breaker core module of a magnetic control mechanism and a ring main unit based on the module are provided.
[0038] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-Figure 5 As shown, according to an embodiment of the utility model, a circuit breaker core module of a magnetic control mechanism is provided, and the circuit breaker core module 29 of the magnetic control mechanism is installed inside the air box 18 of the ring network cabinet. The circuit breaker core module 29 of the magnetic control mechanism includes a mounting plate 1 arranged at one end of the inner side of the air box 18, and a transmission main shaft 3 is penetrated through one side of the mounting plate 1. One end of the transmission main shaft 3 is sleeved with a circuit breaker dynamic fit 2 that matches with the mounting plate 1, and the other end of the transmission main shaft 3 is provided with an L-shaped transmission main shaft guide plate 7, and the other end of the transmission main shaft 3 is sleeved with a guide sleeve 8 that matches with the L-shaped transmission main shaft guide plate 7.
[0039] With the aid of the above-mentioned technical scheme of the utility model, the utility model has a reasonable and reliable structure. By adopting a circuit breaker core module 29 with a magnetic control mechanism and installing it in the ring network cabinet gas box 18, the circuit breaker is not affected by the environment (such as condensation, salt spray, temperature, etc.), the operation is reliable, the structure is simple, there are fewer moving parts during operation, no mechanical tripping or locking devices are required, there are fewer fault sources, the mechanical reliability is high, and the performance is more stable.
[0040] In one embodiment, epoxy glass partitions 4 are symmetrically arranged on both sides of the L-shaped transmission main shaft guide plate 7, a plurality of magnetron mechanisms 6 are penetrated through the top of the L-shaped transmission main shaft guide plate 7, and a plurality of opening and closing lever arms 5 cooperating with the magnetron mechanisms 6 are sleeved on the middle of the transmission main shaft 3, an insulating pull rod 9 is arranged at the bottom end of the magnetron mechanism 6, a vacuum arc extinguishing chamber 12 is arranged at the bottom end of the insulating pull rod 9, a soft connector 10 cooperating with the epoxy glass partition 4 is arranged at the moving end of the top of the vacuum arc extinguishing chamber 12, and the vacuum arc extinguishing chamber 12 An arc extinguishing chamber guide plate 11 connected to the epoxy glass partition 4 is arranged at the top, an isolation module rear mounting plate 13 is arranged on one side of the arc extinguishing chamber guide plate 11, an isolation module front mounting plate 16 is arranged on the other side of the arc extinguishing chamber guide plate 11, and an isolation main shaft 14 is arranged between the isolation module rear mounting plate 13 and the isolation module front mounting plate 16, and a grounding component 15 is arranged on one side of the isolation main shaft 14, thereby achieving more efficient circuit breaker operation and arc extinguishing performance, and improving the overall reliability and safety of the ring network cabinet.
[0041] In one embodiment, the magnetic control mechanism 6 includes a static iron core 602 arranged at the top of the L-shaped transmission main shaft guide plate 7, a driving rod 603 is penetrated through the bottom end of the static iron core 602, a moving iron core 601 matching the static iron core 602 is sleeved on the top outer side of the driving rod 603, a trip spring 604 is sleeved on the middle part of the driving rod 603, and a plurality of excitation coils 605 are arranged on the top of the static iron core 602, thereby realizing precise control of the opening and closing actions of the circuit breaker through the magnetic control mechanism 6, enhancing the stability of operation and reducing mechanical wear.
[0042] The working principle of the circuit breaker core module 29 of the magnetic control mechanism is as follows: first, the magnetic control mechanism 6 is connected to the vacuum arc extinguishing chamber 12 by an insulating pull rod 9. The magnetic control mechanism 6 is composed of a moving iron core 601, a static iron core 602, a driving rod 603, a tripping spring 604 and an excitation coil 605. When the magnetic control mechanism 6 is in operation, it needs to be used in conjunction with the driving module 24 to complete the closing and opening actions.
[0043] When closing the circuit, the closing capacitor in the drive module 24 discharges the excitation coil 605 to generate current, forming an induced magnetic field, magnetizing the moving iron core 601 and the static iron core 602 to generate suction, and the moving iron core 601 overcomes the elastic force of the opening spring 604 and moves downward, while driving the driving rod 603 and the insulating pull rod 9 to move downward, and the moving contact and the static contact in the vacuum arc chamber 12 are closed, and the moving iron core 601 continues to move downward and is attracted by the static iron core 602. At the same time, the insulating pull rod 9 compresses the contact pressure spring (overtravel spring), and the closing is completed. At this time, the magnetic holding force between the moving iron core 601 and the static iron core 602 remains stable, and the switch remains in the closed state.
[0044] When opening the circuit breaker, the opening capacitor in the driving module 24 discharges the excitation coil 605 in the reverse direction to generate current. The generated induced magnetic field is opposite to the magnetic field of the iron core, and the iron core is demagnetized. When the magnetic force is less than the sum of the opening spring 604 and the contact pressure spring (overtravel spring), the moving iron core 601 cannot maintain the attracted state. After the gap is generated, the magnetic force disappears, driving the insulating pull rod 9 and the moving contact in the vacuum arc chamber 12 to move together, and the moving contact and the static contact in the vacuum arc chamber 12 open to complete the opening action.
[0045] The magnetic control mechanism 6 is connected to the transmission main shaft 3 through the opening and closing arm 5. The magnetic control circuit breaker mounting plate 1, the circuit breaker dynamic fit 2 and the transmission main shaft guide plate 7 are respectively installed on both sides of the transmission main shaft 3. The guide sleeve 8 is installed on the transmission main shaft guide plate 7. The magnetic control mechanism 6 is connected to the vacuum arc chamber 12 through an insulating pull rod 9. The moving end of the vacuum arc chamber is installed with a soft connection 10. The outer side of the vacuum arc chamber 12 is connected to the epoxy glass plate 4 by the arc chamber guide plate 11 to stabilize the magnetic control circuit breaker. The isolation module front mounting plate 16, the isolation module rear mounting plate 13, the isolation main shaft 14, the grounding component 15 and other components are installed below the magnetic control circuit breaker to form a complete magnetic control mechanism circuit breaker core module 29.
[0046] When the circuit breaker core module 29 of the magnetic control mechanism closes or opens, the circuit breaker dynamic coordination 2 is driven to operate together through the transmission main shaft 3. The circuit breaker dynamic coordination 2 is connected to the emergency opening mechanism 40, and the emergency opening mechanism 40 also operates together, so that the closing and opening operating status of the ring network cabinet is determined through the closing and opening indications on the mechanism room panel 21.
[0047] The emergency tripping mechanism 40 is installed on the outside of the gas box 18, and the circuit breaker core module 29 of the magnetic control mechanism is installed inside the gas box 18. The two are connected together through the circuit breaker dynamic cooperation 2. When the circuit breaker core module 29 of the magnetic control mechanism is electrically closed or opened, the magnetic control mechanism 6 drives the transmission main shaft 3 to rotate, and the transmission main shaft 3 drives the circuit breaker dynamic cooperation 2 to rotate, thereby driving the emergency tripping mechanism 40 to operate.
[0048] like Fig.10 As shown, the emergency trip mechanism 40 is fixed on the gas box 18 through a mounting plate 4005. The main parts of the emergency trip mechanism 40 are an operating shaft 4001, a connecting main shaft 4003 and a rotating sleeve 4004. The rotating sleeve 4004 is connected to the circuit breaker dynamic fit 2.
[0049] Among them, the operating shaft guide sleeve 4002 guides the connecting main shaft 4003, the reinforcing plate 4006 strengthens the mounting plate 4005, the support rod 4007 supports and guides the up and down movement of the interlocking plate 4008, the counter 4009 records the number of closing times of the circuit breaker core module of the magnetic control mechanism, and the guide plate 40010 guides the interlocking plate 4008.
[0050] The working principle of the electric operation of the emergency trip mechanism 40 is as follows: the drive module 24 in the control box 20 will send a signal to the magnetic control mechanism 6. When the circuit breaker core module 29 of the magnetic control mechanism is electrically closed or opened, the magnetic control mechanism 6 drives the transmission main shaft 3 to rotate, and the transmission main shaft 3 drives the circuit breaker dynamic cooperation 2 to rotate. The circuit breaker dynamic cooperation 2 will drive the rotating sleeve 4004 and the connecting main shaft 4003 on the emergency trip mechanism 40 to rotate together.
[0051] The working principle of manual operation of the emergency tripping mechanism 40 is: when emergency power outage for maintenance is required, the corresponding operating handle needs to be inserted into the operating shaft 4001 and rotated counterclockwise. At this time, the connecting main shaft 4003 and the rotating sleeve 4004 drive the circuit breaker dynamic cooperation 2 to rotate counterclockwise, and the circuit breaker dynamic cooperation 2 drives the transmission main shaft 3 to rotate, and the transmission main shaft 3 drives the magnetic control mechanism 6 to rotate to achieve emergency tripping.
[0052] According to another embodiment of the present invention, Figure 6-Figure 8 As shown, a ring main unit is also provided, which includes a cable box door 22, a cable box 17 is arranged on one side of the cable box door 22, an air box 18 is arranged on the top of the cable box 17, a mechanism box 19 is arranged on one side of the air box 18, a control box 20 is arranged on the top of the mechanism box 19, and a mechanism box panel 21 is arranged on one side of the mechanism box 19.
[0053] In one embodiment, cable box side panels 32 are symmetrically arranged on both sides of the cable box 17, a vertical grounding bar 33 is arranged at the top of one side of the cable box side panel 32, a horizontal grounding bar 34 is arranged at the bottom end of the vertical grounding bar 33, a cable fixing beam 35 is arranged at the bottom end of one side of the cable box side panel 32, and a phase-separated cable clamp 36 is arranged in the middle of one side of the cable box side panel 32, thereby achieving good cable fixing, grounding and phase management, and ensuring the safety and reliability of cable access.
[0054] In one embodiment, air box side panels 27 are symmetrically arranged on both sides of the air box 18, and a plurality of side expansion bus sockets 28 are arranged on the top of the air box side panels 27. A circuit breaker core module 29 of a magnetic control mechanism connected to the side expansion bus sockets 28 is arranged on the inner side of the air box 18, and a lower branch bus 30 is arranged at the bottom end of the circuit breaker core module 29 of the magnetic control mechanism, and an inlet and outlet line insulator 31 is arranged at one end of the lower branch bus 30, and a three-phase integrated CT 38 is arranged at one end of the inlet and outlet line insulator 31, and an air box check valve 41 is arranged at one end of the air box 18, thereby realizing efficient bus connection inside the air box 18 and integration of the circuit breaker core module 29 of the magnetic control mechanism, thereby improving the electrical performance and expansion capability of the ring network cabinet.
[0055] In one embodiment, an isolation operating mechanism 39 is provided at the top of the inner side of the mechanism box 19, and an emergency tripping mechanism 40 is provided at the top of the inner side of the mechanism box 19; a drive module box 25 is provided at the top of the control box 20, a drive module box door panel 23 is provided on one side of the drive module box 25, a drive module 24 is provided in the middle of the inner side of the drive module box 25, a secondary wiring groove 26 is provided on one side of the control box 20, and a control box door panel 42 is provided on the other side of the control box 20; an infrared temperature measurement observation window 37 is provided at the top of one side of the cable box door 22, thereby realizing convenience of operation and rapid response capability in emergency situations, and enhancing the fault handling and maintenance efficiency of the ring network cabinet.
[0056] In addition, it should be noted that Fig. 9 As shown, the isolation operating mechanism 39 is installed on the outside of the air box 18 through four supporting columns, including an isolation main shaft 3901 and a grounding main shaft 3902. An isolation mechanism dynamic cooperation 2 is installed at one end of the isolation operating mechanism 39. The isolation mechanism dynamic cooperation 2 drives the four-axis rotation of the isolation switch on the lower part of the circuit breaker core module 29 of the magnetic control mechanism to realize the isolation switch closing, isolation switch opening, grounding switch closing and grounding switch opening operations of the isolation switch. The principle is the same as the closing and opening operations of the circuit breaker, except that the isolation operating mechanism can only be operated manually. This is a prior art and will not be elaborated on here.
[0057] The working principle of the ring main unit is as follows: when the ring main unit is in a normal power supply state, the circuit breaker core module 29 of the magnetic control mechanism remains in a closed state, so that the cables in the cable box 17 can be connected to the external power grid through the lower branch bus 30 to provide power to the user. The cables are fixed and phase-managed through the phase-separated cable clamps 36 to ensure the safety and reliability of the cables. The ring main unit is a group of electrical equipment for transmission and distribution (high-voltage switchgear) installed in a metal or non-metallic insulating cabinet or made into an assembled interval ring network power supply unit to form a ring main unit power supply. It is composed of at least two cabinets to form an incoming and outgoing line loop.
[0058] The specific process of power transmission operation of the ring main unit is as follows:
[0059] 1) After the inspection is completed, the cable box door 22 is installed on the cabinet and the screws on the door are tightened;
[0060] 2) Insert the operating handle into the grounding main shaft 3902 on the isolation operating mechanism 39 and rotate it counterclockwise to open the grounding switch; insert the operating handle into the isolation main shaft 3901 on the isolation operating mechanism 39 and rotate it clockwise to close the isolation switch;
[0061] 3) The core module 29 of the magnetic control mechanism performs a closing operation on the circuit breaker. The drive module 24 is powered on, and the closing button in the control box 20 is pressed to close the circuit breaker.
[0062] The specific process of power outage operation of the ring main unit is as follows:
[0063] 1) The circuit breaker core module 29 of the magnetic control mechanism is opened by pressing the opening button in the control box 20, and the circuit breaker is opened; or in case of emergency opening, the operating handle is inserted into the operating shaft 4001 on the emergency opening mechanism 40 and rotated counterclockwise, and the circuit breaker core module 29 of the magnetic control mechanism is opened;
[0064] 2) Insert the operating handle into the isolation main shaft 3901 on the isolation operating mechanism 39 and rotate it counterclockwise to open the isolation switch; then insert the operating handle into the grounding main shaft 3902 on the isolation operating mechanism 39 and rotate it clockwise to open and close the grounding switch;
[0065] 3) Remove the screws on the cable box door 22, lift the cable box door 22 upward, and then open the cable box door 22 for inspection.
[0066] The upper part of the circuit breaker core module 29 of the magnetic control mechanism is a circuit breaker module, and the lower part is an isolating switch module. The two modules are respectively equipped with corresponding dynamic matching and operating mechanisms.
[0067] The specific process of the power supply operation of the circuit breaker core module 29 of the magnetic control mechanism is: closing the cable box door, opening the grounding switch, closing the isolating switch, and closing the circuit breaker; the specific process of the power outage operation of the circuit breaker core module 29 of the magnetic control mechanism is: opening the circuit breaker, opening the isolating switch, closing the grounding switch, and opening the cable box door; because the circuit breaker module and the isolation module have mechanical interlocks, the above sequence must be strictly followed to achieve the closing and opening operations of the ring network cabinet.
[0068] When a circuit breaking operation is required (for example, a fault occurs or maintenance is required), the magnetron mechanism 6 receives a control signal, and the drive module 24 discharges the excitation coil 605. The moving iron core 601 is separated from the stationary iron core 602 by magnetic force, thereby disconnecting the circuit. The separation of the moving iron core 601 causes the insulating pull rod 9 to pull the moving contact in the vacuum arc chamber 12 to achieve circuit breaking. During the circuit breaking process, the moving contact in the vacuum arc chamber 12 is separated from the stationary contact to generate an arc. The arc chamber 11 and the epoxy glass partition 4 in the vacuum environment can quickly extinguish the arc, prevent arc light and prolong the arc time, and reduce damage to the equipment. In emergency situations, such as short circuit or overload, the emergency tripping mechanism 40 will be activated to quickly disconnect the circuit to protect the safety of the power grid and equipment. The emergency tripping can be indicated by the operation on the mechanism box panel 21.
[0069] The ring main unit can expand the busbar through the side expansion busbar socket 28 on the gas box side panel 27, which enhances the ability of the ring main unit to adapt to different power grid structures. The three-phase integrated CT 38 and the inlet and outlet line insulators 31 ensure the accurate measurement of current and the safe connection of the line. The drive module 24 and the secondary wiring trough 26 in the control box 20 are responsible for receiving control signals and executing circuit breaker operations. The infrared temperature measurement observation window 37 can be used to monitor the equipment temperature to prevent overheating. In addition, the structural design of the ring main unit also takes into account the needs of easy maintenance and rapid response to emergencies, and ensures the safety of operation through components such as the grounding component 15 and the isolation operating mechanism 39.
[0070] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.
[0071] In actual application, the magnetic control mechanism 6 is installed on the top of the circuit breaker core module 29 of the magnetic control mechanism. Each phase vacuum arc extinguishing chamber 12 of the circuit breaker core module 29 of the magnetic control mechanism is individually configured with a magnetic control mechanism 6. The driving rod of the magnetic control mechanism 6 is directly connected to the moving end of the vacuum arc extinguishing chamber 12 and moves vertically up and down. The transmission energy loss is low during the transmission process, the transmission efficiency is high, and the magnetic holding force is strong. When the circuit breaker core module 29 of the magnetic control mechanism is closed, the closing capacitor discharges the coil to generate current, induces a magnetic field, and generates suction, and the circuit breaker is closed. When the circuit breaker core module 29 of the magnetic control mechanism is opened, the opening capacitor generates a reverse discharge current, and the generated induced magnetic field is opposite to the magnetism of the iron core. The iron core is demagnetized and cannot continue to maintain the attracted state. The opening spring acts to complete the opening.
[0072] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.
[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A circuit breaker core module of a magnetic control mechanism, wherein the circuit breaker core module (29) of the magnetic control mechanism is installed inside a gas box (18) of a ring main unit, and is characterized in that: The circuit breaker core module (29) of the magnetic control mechanism comprises a mounting plate (1) arranged at one end of the inner side of the air box (18); a transmission main shaft (3) is penetrated through one side of the mounting plate (1); one end of the transmission main shaft (3) is sleeved with a circuit breaker dynamic fit (2) that matches the mounting plate (1); the other end of the transmission main shaft (3) is provided with an L-shaped transmission main shaft guide plate (7); the other end of the transmission main shaft (3) is sleeved with a guide sleeve (8) that matches the L-shaped transmission main shaft guide plate (7).
2. A circuit breaker core module of a magnetic control mechanism according to claim 1, characterized in that: Epoxy glass partitions (4) are symmetrically arranged on both sides of the L-shaped transmission main shaft guide plate (7), a plurality of magnetic control mechanisms (6) are penetrated through the top end of the L-shaped transmission main shaft guide plate (7), and a plurality of opening and closing lever arms (5) cooperating with the magnetic control mechanisms (6) are sleeved on the middle part of the transmission main shaft (3).
3. A circuit breaker core module of a magnetic control mechanism according to claim 2, characterized in that: An insulating pull rod (9) is provided at the bottom end of the magnetron mechanism (6), a vacuum arc extinguishing chamber (12) is provided at the bottom end of the insulating pull rod (9), and a flexible connector (10) matching the epoxy glass partition (4) is provided at the movable end at the top of the vacuum arc extinguishing chamber (12).
4. A circuit breaker core module of a magnetic control mechanism according to claim 3, characterized in that: An arc extinguishing chamber guide plate (11) connected to the epoxy glass partition plate (4) is arranged at the top of the vacuum arc extinguishing chamber (12); an isolation module rear mounting plate (13) is arranged on one side of the arc extinguishing chamber guide plate (11); an isolation module front mounting plate (16) is arranged on the other side of the arc extinguishing chamber guide plate (11); an isolation main shaft (14) is arranged between the isolation module rear mounting plate (13) and the isolation module front mounting plate (16); and a grounding component (15) is arranged on one side of the isolation main shaft (14).
5. A circuit breaker core module of a magnetic control mechanism according to claim 4, characterized in that: The magneto-control mechanism (6) comprises a stationary iron core (602) arranged at the top end of the L-shaped transmission main shaft guide plate (7); a driving rod (603) is provided through the bottom end of the stationary iron core (602); a moving iron core (601) matching the stationary iron core (602) is sleeved on the outer side of the top of the driving rod (603); a brake opening spring (604) is sleeved in the middle of the driving rod (603); and a plurality of excitation coils (605) are provided at the top end of the stationary iron core (602).
6. A ring main unit, which realizes the opening and closing operation of the ring main unit based on the circuit breaker core module of the magnetic control mechanism according to any one of claims 1 to 5, characterized in that: The ring main unit comprises a cable box door (22), a cable box (17) is arranged on one side of the cable box door (22), a gas box (18) is arranged on the top of the cable box (17), a mechanism box (19) is arranged on one side of the gas box (18), a control box (20) is arranged on the top of the mechanism box (19), and a mechanism box panel (21) is arranged on one side of the mechanism box (19).
7. The ring main unit according to claim 6, characterized in that: Cable box side panels (32) are symmetrically arranged on both sides of the cable box (17); a vertical grounding bar (33) is arranged at the top of one side of the cable box side panel (32); a horizontal grounding bar (34) is arranged at the bottom of the vertical grounding bar (33); a cable fixing beam (35) is arranged at the bottom of one side of the cable box side panel (32); and a phase-separated cable clamp (36) is arranged in the middle of one side of the cable box side panel (32).
8. The ring main unit according to claim 6, characterized in that: The gas box (18) is symmetrically provided with gas box side plates (27) on both sides, a plurality of side expansion bus sockets (28) are provided at the top of the gas box side plates (27), a circuit breaker core module (29) of a magnetic control mechanism connected to the side expansion bus sockets (28) is provided on the inner side of the gas box (18), a lower branch bus (30) is provided at the bottom end of the circuit breaker core module (29) of the magnetic control mechanism, an inlet and outlet insulator (31) is provided at one end of the lower branch bus (30), a three-phase integrated CT (38) is provided at one end of the inlet and outlet insulator (31), and a gas box check valve (41) is provided at one end of the gas box (18).
9. The ring main unit according to claim 6, characterized in that: An isolation operating mechanism (39) is provided at the top of the inner side of the mechanism box (19), and an emergency opening mechanism (40) is provided at the top of the inner side of the mechanism box (19); A drive module box (25) is arranged at the top of the control box (20), a drive module box door panel (23) is arranged on one side of the drive module box (25), a drive module (24) is arranged in the middle of the inner side of the drive module box (25), a secondary wiring groove (26) is arranged on one side of the control box (20), and a control box door panel (42) is arranged on the other side of the control box (20); An infrared temperature measurement observation window (37) is provided at the top end of one side of the cable box door (22).