10kV electric temperature control vacuum circuit breaker

Abstract

The utility model belongs to the technical field of switches, and particularly relates to a 10kV electric temperature control vacuum circuit breaker. According to the 10kV electric temperature control vacuum circuit breaker provided by the utility model, an equipment basis is provided for realizing monitoring, remote control and remote automatic control functions. The device is characterized in that an electric push-pull device is arranged in a box body, and a telescopic rod of the electric push-pull device is connected with a movable contact rod of a standard vacuum tube through an insulating pull rod; a connecting wire is arranged on the movable contact rod, the connecting wire is connected with a heating resistor disc, the heating resistor disc is connected with an output wire, and the end part of the output wire extends out of the box body; an electronic temperature measuring instrument corresponding to the heating resistor disc is arranged on the box body; and the electronic temperature measuring instrument is connected with the temperature control switch and the electric push-pull device.

Description

Technical Field

[0001] The utility model belongs to the technical field of switches, and in particular relates to a 10kV electric temperature-controlled vacuum circuit breaker. Background Art

[0002] At present, the construction of urban distribution networks requires more 10kV intelligent and energy-saving switches with special functions. The reality is that the only 10kV vacuum circuit breakers are of a single type, which is far from meeting the needs of power system modernization construction, let alone the needs of intelligent distribution network modernization construction, and cannot realize the new pattern of intelligent modernization development of urban distribution networks.

[0003] In the current construction of urban distribution networks, 10kV circuit breakers, as key equipment, must meet the demands of intelligent and modern development. However, the relatively limited variety and functionality of existing 10kV vacuum circuit breakers fall far short of meeting the growing demands for power system modernization, and even further from achieving the goal of intelligent urban distribution networks, hindering further upgrades to the power system. Summary of the Invention

[0004] The present invention aims to solve the above problems and provides a 10kV electric temperature-controlled vacuum circuit breaker. The 10kV electric temperature-controlled vacuum circuit breaker provides an equipment basis for realizing monitoring, remote control and remote automatic control functions.

[0005] In order to achieve the above-mentioned purpose of the present invention, the present invention adopts the following technical solution, which includes a box body, in which a standard vacuum tube having a fixed conductor and a movable contact rod is arranged, and the input end of the fixed conductor is arranged outside the box body, and is characterized in that: an electric push-pull device is arranged in the box body, and the telescopic rod of the electric push-pull device is connected to the movable contact rod of the standard vacuum tube through an insulating pull rod; a connecting wire is provided on the movable contact rod, and the connecting wire is connected to a heating resistor, and the heating resistor is connected to an output wire, and the end of the output wire extends out of the box body; an electronic thermometer corresponding to the heating resistor is provided on the box body, and the electronic thermometer is connected to the temperature control switch and the electric push-pull device.

[0006] As a preferred solution of the present utility model, an insulating isolation plate is provided in the box body, one side of the insulating isolation plate is a non-electric operation compartment, and the other side is a powered compartment; the electric push-pull device is provided in the non-electric operation compartment, and the telescopic rod of the electric push-pull device passes through the insulating isolation plate and is connected to the insulating pull rod in the powered compartment.

[0007] Furthermore, the insulating pull rod includes a first insulator connected to the telescopic rod of the electric push-pull device, and the first insulator is connected to the second insulator; the heating resistor is fixedly arranged on the second insulator; the second insulator is connected to the moving contact rod; the connecting wire is fixed between the second insulator and the moving contact rod; and the output wire is fixed between the second insulator and the first insulator.

[0008] Furthermore, an insulating tube is provided on the box body, and the electronic thermometer is provided at the outer opening of the insulating tube, and the inner opening of the insulating tube corresponds to the heating resistor on the second insulator.

[0009] As another preferred embodiment of the present invention, the heating resistor is a resistance-type bimetallic strip. When the current passing through the heating resistor is lower than the rated current, the electronic thermometer and the temperature control switch do not operate. When the current passing through the heating resistor is higher than the rated current, the temperature of the heating resistor rises and reaches a threshold value. The electronic thermometer sends a signal and the temperature control switch controls the electric push-pull device to retract the telescopic rod.

[0010] As a third preferred solution of the present invention, a marking rod is provided in the box body with one end hinged and fixed, the middle part hinged to the telescopic rod of the electric push-pull device, and the other end extending out of the box body, and a guide groove corresponding to the marking rod is provided on the box body.

[0011] Furthermore, the middle portion of the marking rod and the connecting piece are connected to each other through a connecting shaft and a connecting hole; the inner diameter of the connecting hole is larger than the outer diameter of the connecting shaft.

[0012] Furthermore, a spring seat is provided on both sides of the middle of the guide groove in the box body, and a thrust spring is provided on each of the two spring seats. The two thrust springs are respectively connected to the two sides of the marking rod.

[0013] As a fourth preferred solution of the present utility model, the electric push-pull device is connected to a solar power source.

[0014] As a fifth preferred solution of the present invention, a network camera corresponding to the marking pole is provided outside the box.

[0015] The beneficial effects of this utility model are as follows: 1. This utility model utilizes a low-voltage DC power supply as the power source for the control system, avoiding the high power losses caused by the use of 10kV voltage transformers in traditional equipment. This also simplifies the equipment structure and reduces energy consumption. Furthermore, the use of electronic control to open and close the circuit breaker provides a foundation for digital control, remote control, and remote automation of the circuit breaker.

[0016] 2. The current-sensitive nature of the heating resistor, combined with an electronic thermometer, allows precise monitoring of current and temperature changes, enabling automatic power-off protection in the event of overload. This provides a foundation for intelligent control. This utility model, combined with a control system, can also systematically and automatically restore power based on the temperature reading when the current returns to the rated value, completing fault isolation and self-healing control, effectively improving the stability and reliability of grid operation.

[0017] 3. An electric push-pull actuator controls the opening and closing of the vacuum circuit breaker, and an insulating partition isolates the live area from the operating area, ensuring safe and reliable operation. The design of the indicator rod and positioning spring ensures precise positioning of the opening and closing positions, making operation intuitive and maintenance easy. The indicator rod and optional network camera on the outside of the box further enhance the visualization of operating status and the integrity of maintenance records.

[0018] 4. The electric push-pull device can be powered by a solar photovoltaic system and equipped with a long-life maintenance-free lithium battery, which can ensure that the equipment can continue to operate when the main power supply is cut off.

[0019] 5. This utility model adopts a modular design with a simple structure and is easy to upgrade and expand. By integrating the communication module and the intelligent control module, it can flexibly adapt to different distribution network scenarios, thereby improving the compatibility and application range of the equipment.

[0020] 6. This utility model can realize single-phase load switch operation, meeting the specific needs of residential power supply. It can also be extended to complex power grid environments such as industrial and commercial, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the present utility model.

[0022] Figure 2 yes Figure 1 AA cross-sectional view.

[0023] Figure 3 This is a schematic diagram of the position of the marking rod in the open state.

[0024] Figure 4 This is a schematic diagram of the position of the marking rod in the closed state.

[0025] Figures 2-4 In the figure, F is the thrust direction of the thrust spring.

[0026] Figure 5 Schematic diagram of the current-temperature curve of the heating resistor used in the embodiment.

[0027] In the accompanying drawings, 1 is a standard vacuum tube, 2 is a box, 3 is a connecting wire, 4 is a heating resistor, 5 is an insulating tube, 6 is an electronic thermometer, 7 is a second insulator, 8 is an output wire, 9 is a first insulator, 10 is an insulating isolation plate, 11 is a hinged support, 12 is a telescopic rod, 13 is a temperature control switch, 14 is a position adjustment component, 15 is a hinged bracket, 16 is an electric push-pull device, 17 is a guide groove, 18 is a marking rod, 19 is a conductive output end, 20 is a moving contact rod, 21 is a fixed conductor, 22 is an input end, 23 is a thrust spring, 24 is a spring seat, 25 is an insulating pull rod, 26 is a connecting shaft, and 27 is a connecting hole. DETAILED DESCRIPTION

[0028] The utility model includes a box body 2, in which a standard vacuum tube 1 having a fixed conductor 21 and a movable contact rod 20 is arranged. The input end 22 of the fixed conductor 21 is arranged outside the box body 2. An electric push-pull device 16 is arranged in the box body 2. The telescopic rod 12 of the electric push-pull device 16 is connected to the movable contact rod 20 of the standard vacuum tube 1 through an insulating pull rod 25; a connecting wire 3 is provided on the movable contact rod 20, the connecting wire 3 is connected to a heating resistor 4, the heating resistor 4 is connected to an output wire 8, and the end of the output wire 8 extends outside the box body 2; an electronic thermometer 6 corresponding to the heating resistor 4 is provided on the box body 2, and the electronic thermometer 6 is connected to the temperature control switch 13 and the electric push-pull device 16.

[0029] The opening and closing functions of the standard vacuum tube 1 are controlled by the extension and contraction of the electric push-pull device 16. At the same time, combined with the heating resistor 4 and the electronic thermometer 6, the current overload can be intelligently monitored and the power supply can be automatically disconnected to ensure the safe operation of the system.

[0030] An insulating isolation plate 10 is provided in the box body 2, one side of the insulating isolation plate 10 is a non-electric operation compartment, and the other side is a charged compartment; the electric push-pull device 16 is provided in the non-electric operation compartment, and the telescopic rod 12 of the electric push-pull device 16 passes through the insulating isolation plate 10 and is connected to the insulating pull rod 25 in the charged compartment.

[0031] The live compartment and the non-powered operation compartment are completely separated by the insulating isolation plate 10, avoiding the risk of electric shock during operation, while improving the safety and operational reliability of the electric push-pull device 16.

[0032] The insulating pull rod 25 includes a first insulator 9 connected to the telescopic rod 12 of the electric push-pull device 16, and the first insulator 9 is connected to the second insulator 7; the heating resistor 4 is fixedly arranged on the second insulator 7; the second insulator 7 is connected to the moving contact rod 20; the connecting wire 3 is fixed between the second insulator 7 and the moving contact rod 20; and the output wire 8 is fixed between the second insulator 7 and the first insulator 9.

[0033] The connection of the multi-section insulating pull rod 25 ensures the insulation between the electric push-pull device 16 and the live parts, while enhancing the stability and reliability of the overall structure and reducing the risk of short circuit and electric shock.

[0034] An insulating tube 5 is provided on the box body 2 , and the electronic thermometer 6 is provided at the outer opening of the insulating tube 5 . The inner opening of the insulating tube 5 corresponds to the heating resistor 4 on the second insulator 7 .

[0035] The provision of the insulating tube 5 further improves the working safety of the electronic thermometer, and at the same time facilitates the thermometer to accurately monitor the temperature of the heating resistor 4, thereby enhancing the overload protection function of the equipment.

[0036] The heating resistor 4 is a resistance-type bimetallic strip. When the current passing through the heating resistor 4 is lower than the rated current, the electronic thermometer 6 and the temperature control switch 13 do not operate. When the current passing through the heating resistor 4 is higher than the rated current, the temperature of the heating resistor 4 rises and reaches a threshold value. The electronic thermometer 6 sends a signal, and the temperature control switch 13 controls the electric push-pull device 16 to retract the telescopic rod 12.

[0037] By utilizing the temperature-sensitive characteristics of the bimetallic strip, the overload status can be accurately monitored and the power can be cut off in time.

[0038] The box body 2 is provided with a marking rod 18 with one end hinged and fixed, the middle part hinged to the telescopic rod 12 of the electric push-pull device 16, and the other end extending out of the box body 2. The box body 2 is provided with a guide groove 17 corresponding to the marking rod 18.

[0039] The marking rod 18 is linked with the telescopic rod 12 to intuitively display the open and closed status of the switch, making it convenient for the operator to understand the switch status in real time and improving the convenience of operation.

[0040] The middle portion of the marking rod 18 and the connecting piece are connected to each other via a connecting shaft 26 and a connecting hole 27 ; the inner diameter of the connecting hole 27 is larger than the outer diameter of the connecting shaft 26 .

[0041] A spring seat 24 is provided on both sides of the middle of the guide groove 17 in the box body 2 , and a thrust spring 23 is provided on each of the two spring seats 24 . The two thrust springs 23 are respectively connected to the two sides of the marking rod 18 .

[0042] The thrust spring 23 provides the marking rod 18 with auxiliary functions of resetting and positioning, thereby ensuring the stability of the opening and closing states of the marking rod 18 and preventing malfunction.

[0043] The electric push-pull device 16 is connected to a solar power source.

[0044] The use of solar power supply improves the green energy utilization efficiency of the equipment, while ensuring the ability to operate independently in the event of external power supply interruption.

[0045] A network camera corresponding to the marking pole 18 is arranged outside the box 2 .

[0046] The installation of network cameras enables remote monitoring of circuit breaker status, facilitates recording of operating status and fault diagnosis, and enhances the intelligence and management convenience of the equipment.

[0047] The electric push-pull device 16 is connected to the box body 2 via a hinged bracket 15 ; a position adjustment component 14 is also provided between the hinged bracket 15 and the box body 2 .

[0048] The design of the articulated bracket 15 and the position adjustment assembly 14 facilitates the installation and adjustment of the electric push-pull device, thereby improving the installation flexibility and operational stability of the equipment.

[0049] Example: 1. Opening and Closing. The upper end of the fixed conductor 21 of the standard vacuum tube 1 extends out of the housing 2, serving as a one-way access terminal. The lower end of the fixed conductor 21 contacts the fixed conductor 21 within the standard vacuum tube 1. The upper end of the movable contact rod 20 corresponds to the lower end of the fixed conductor 21. The lower end of the movable contact rod 20 is located outside the standard vacuum tube 1 and connected to the connecting wire 3. When the movable contact rod 20 moves upward, the circuit is closed, and when it moves downward, the circuit is opened.

[0050] 2. The movable contact rod 20 is connected to the connecting wire 3, the connecting wire 3 is connected to the free end of the heating resistor 4, the other fixed end of the heating resistor 4 is connected to the output wire 8, and the output end of the output wire 8 extends out of the box 2 to form an output circuit.

[0051] 3. The basic principle of achieving opening and closing is that an external electronic thermometer 6, installed at a horizontal distance of 150 mm from the heating resistor 4 and supported by the insulating tube 5, can accurately measure the temperature of the heating resistor 4. The heating resistor 4 used in this embodiment is a bimetallic strip, which can be purchased from the market or customized. It is a prior art. The current-temperature curve of the heating resistor 4 in this embodiment is as follows: Figure 5 When the temperature of the heating resistor 4 reaches 60-80°C, the electronic thermometer 6 sends a signal, which can realize the warning and power-off functions. The temperature control switch 13 is controlled. The temperature control switch 13 sends a command through the control wire to notify the electric push-pull device 16 to pull the movable contact rod 20, completing the power-off process.

[0052] 4. The up and down movement of the movable contact rod 20 is completed by the up and down movement of the electric push-pull device 16.

[0053] 5. The electric push-pull mechanism 16 has an independent solar photovoltaic 24V DC power supply, which is a long-life maintenance-free rechargeable lithium battery. The power battery can be installed in the control box and is not affected by power outages in the controlled circuit.

[0054] 6. In order to ensure that the movable contact rod 20 is stable during the up and down movement, the insulating rod is set as two parts, the first insulator 9 and the second insulator 7, to ensure that the contacts move accurately and in close contact during the up and down movement. Although the movement trajectory of the middle of the marking rod 18 and the connection point of the insulating rod is an arc, due to the small movement stroke, the inner diameter of the connecting hole 27 is larger than the outer diameter of the connecting shaft 26, and the structural gap of the utility model can meet the movement requirements.

[0055] 7. The push or pull force of the electric push-pull device 16 is greater than the self-closing force of the standard vacuum tube 1, which can realize micro-electric push and pull control.

[0056] 8. In order to ensure that the switch reaches the accurate position, the utility model is installed with a thrust spring 23. Two thrust springs 23 are provided, which are symmetrically arranged on both sides of the marking rod 18. The thrust direction points to the marking rod 18, which can achieve the fixed state of locking the opening and closing of the switch.

[0057] 9. When opening, the pulling force of the electric push-pull mechanism 16 is greater than the self-closing force of the standard vacuum tube 1, and the movable contact rod 20 is pulled to the locked position for opening. When closing, the pushing force of the electric push-pull mechanism and the self-closing force of the standard vacuum tube 1 are in the same direction, pushing the movable contact rod 20 to the closed position.

[0058] 10. The insulating partition separates the charged body from the non-charged body, so that the micro-electric push-pull rod is in the non-charged area, ensuring its safe and reliable operation process.

[0059] 11. The position adjustment assembly 14 extends out of the box body 2 and is used to fix the hinged bracket 15 of the electric push-pull device 16. After being fixed, a gap is left, which can be used for manual operation to adjust the moving contact rod 20 of the switch through the linked electric push-pull device 16, the first insulator 9 and the second insulator 7 to form a switch opening or closing. This manual operation is only used as a backup plan in the event that the micro-electric push-pull device 16 fails.

[0060] 12. The marking rod 18 also has the function of displaying the open or closed state of the switch. The position and state of the open or closed switch can be observed outside the box 2.

[0061] 13. A network camera can be installed on the outside of the switch box 2 to remotely monitor the operating status or maintenance of the switch, the maintenance process, and record the entire process.

[0062] It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Ordinary technicians in this field should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the scope of protection of the present invention.

Claims

1. A 10 kV electric temperature-controlled vacuum circuit breaker, comprising a housing (2), a standard vacuum tube (1) having a fixed conductor (21) and a movable contact rod (20) being arranged in the housing (2), an input end (22) of the fixed conductor (21) being arranged outside the housing (2), and characterized in that: An electric push-pull device (16) is provided in the box (2), and the telescopic rod (12) of the electric push-pull device (16) is connected to the movable contact rod (20) of the standard vacuum tube (1) through an insulating pull rod (25); a connecting wire (3) is provided on the movable contact rod (20), and the connecting wire (3) is connected to a heating resistor (4), and the heating resistor (4) is connected to an output wire (8), and the end of the output wire (8) extends outside the box (2); an electronic thermometer (6) corresponding to the heating resistor (4) is provided on the box (2), and the electronic thermometer (6) is connected to the temperature control switch (13) and the electric push-pull device (16).

2. A 10kV electric temperature-controlled vacuum circuit breaker according to claim 1, characterized in that: An insulating isolation plate (10) is provided in the box body (2), one side of the insulating isolation plate (10) is a non-electrical operation compartment, and the other side is a live compartment; the electric push-pull device (16) is provided in the non-electrical operation compartment, and the telescopic rod (12) of the electric push-pull device (16) passes through the insulating isolation plate (10) and is connected to the insulating pull rod (25) in the live compartment.

3. The 10kV electric temperature-controlled vacuum circuit breaker according to claim 2, characterized in that: The insulating pull rod (25) includes a first insulator (9) connected to the telescopic rod (12) of the electric push-pull device (16), and the first insulator (9) is connected to the second insulator (7); the heating resistor (4) is fixedly arranged on the second insulator (7); the second insulator (7) is connected to the moving contact rod (20); the connecting wire (3) is fixed between the second insulator (7) and the moving contact rod (20); and the output wire (8) is fixed between the second insulator (7) and the first insulator (9).

4. The 10kV electric temperature-controlled vacuum circuit breaker according to claim 3, characterized in that: An insulating tube (5) is provided on the box body (2), and the electronic thermometer (6) is provided at the outer opening of the insulating tube (5). The inner opening of the insulating tube (5) corresponds to the heating resistor (4) on the second insulator (7).

5. The 10kV electric temperature-controlled vacuum circuit breaker according to claim 1, characterized in that: The heating resistor (4) is a resistance-type bimetallic strip. When the current passing through the heating resistor (4) is lower than the rated current, the electronic thermometer (6) and the temperature control switch (13) do not operate. When the current passing through the heating resistor (4) is higher than the rated current, the temperature of the heating resistor (4) rises and reaches a threshold value. The electronic thermometer (6) sends a signal, and the temperature control switch (13) controls the electric push-pull device (16) to retract the telescopic rod (12).

6. The 10kV electric temperature-controlled vacuum circuit breaker according to claim 1, characterized in that: The box body (2) is provided with a marking rod (18) having one end hinged and fixed, a middle portion hinged to a telescopic rod (12) of an electric push-pull device (16), and the other end extending out of the box body (2). The box body (2) is provided with a guide groove (17) corresponding to the marking rod (18).

7. The 10kV electric temperature-controlled vacuum circuit breaker according to claim 6, characterized in that: The middle portion of the marking rod (18) and the connecting piece are connected to each other via a connecting shaft (26) and a connecting hole (27); the inner diameter of the connecting hole (27) is larger than the outer diameter of the connecting shaft (26).

8. The 10kV electric temperature-controlled vacuum circuit breaker according to claim 7, characterized in that: A spring seat (24) is provided on both sides of the middle of the guide groove (17) in the box body (2), and a thrust spring (23) is provided on each of the two spring seats (24). The two thrust springs (23) are respectively connected to the two sides of the marking rod (18).

9. The 10kV electric temperature-controlled vacuum circuit breaker according to claim 1, characterized in that: The electric push-pull device (16) is connected to a solar power source.

10. The 10kV electric temperature-controlled vacuum circuit breaker according to claim 1, characterized in that: A network camera corresponding to the marking pole (18) is provided outside the box (2).

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