A direct current fast breaker automatic reclosing device

Abstract

The utility model relates to circuit breaker technical field discloses a kind of automatic reclosing devices of direct current fast circuit breaker, including circuit breaker main body, the front end of circuit breaker main body is equipped with the knife switch, the front end outside of circuit breaker main body is provided with fixed frame, the rear side of fixed frame is provided with opening, the front end middle part of fixed frame is equipped with sliding slot, the inside of sliding slot is slidably connected with lifting plate, the left and right ends of lifting plate are all provided with limiting rod, the upper and lower ends of limiting rod are fixedly connected in the inside of fixed frame.In the utility model, through servo motor drive, the instruction of receiving external detection equipment can be automatically completed reclosing operation, without manual site wrenching knife switch, not only greatly improve response speed, provide guarantee for fast recovery power supply, also effectively avoid the security risk that artificial operation can bring, especially applicable to unattended or not easily accessible distribution site.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to an automatic reclosing device for a DC fast circuit breaker. Background Technology

[0002] DC circuit breakers, as key protective components in DC power distribution systems, are widely used in important fields such as rail transit, photovoltaic power generation, ship power, and data centers. Their core function is to quickly cut off the fault current when a line fault occurs, so as to protect the safety of electrical equipment and lines.

[0003] Currently, many DC circuit breakers in use rely mainly on manual operation for switching between on and off states. Firstly, when a circuit breaker trips due to a transient fault, if the fault has been cleared on its own, power supply needs to be restored promptly. However, sending personnel to the site to manually close the circuit breaker will prolong the power outage time, making it impossible to restore power supply quickly, thus affecting power supply reliability and user experience. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and propose an automatic reclosing device for DC fast circuit breakers that eliminates the need for manual on-site operation of the switch, thus greatly improving the response speed.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An automatic reclosing device for a DC fast circuit breaker includes a circuit breaker body, a knife switch mounted on the front end of the circuit breaker body, a fixed frame externally mounted on the front end of the circuit breaker body, an opening on the rear side of the fixed frame, a sliding groove in the middle of the front end of the fixed frame, a lifting plate slidably connected inside the sliding groove, limit rods passing through both ends of the lifting plate, the upper and lower ends of the limit rods being fixedly connected inside the fixed frame, a toggle plate fixedly connected to the rear side of the lifting plate, the rear end of the toggle plate being located below the knife switch, and a drive assembly for moving the lifting plate up and down inside the front end of the fixed frame.

[0006] Furthermore, the drive assembly includes a lead screw threadedly connected to the middle of the lifting plate, with the upper and lower ends of the lead screw rotatably connected inside the fixed frame.

[0007] Furthermore, a mounting groove is provided on the upper front side of the fixing frame, and a servo motor is fixedly connected to the front side inside the mounting groove. The drive end of the servo motor is fixedly connected to the top of the lead screw.

[0008] Furthermore, a control box is fixedly connected to the rear side of the inner wall of the mounting groove, and a cover plate is installed at the upper end of the interior of the mounting groove.

[0009] Furthermore, a first anti-slip pad is fixedly connected to the upper side of the lower end of the fixing frame.

[0010] Furthermore, the upper rear end of the fixing frame is provided with a movable hole, a movable rod is movably connected inside the movable hole, a pressure plate is fixedly connected to the lower end of the movable rod, and a second protective pad is fixedly connected to the lower side of the pressure plate.

[0011] Furthermore, a column is fixedly connected to the upper middle part of the pressure plate, and the upper end of the column is movably connected to the upper interior of the fixing frame.

[0012] Furthermore, a knob is rotatably connected to the upper rear end of the fixing frame, and a bolt is fixedly connected to the lower side of the knob, with the lower end of the bolt threaded into the upper end of the column.

[0013] This utility model has the following beneficial effects: 1. In this utility model, the reclosing operation can be automatically completed by receiving instructions from the external detection equipment through the servo motor drive, without the need for manual operation of the switch on site. This not only greatly improves the response speed and provides a guarantee for rapid power restoration, but also effectively avoids the safety risks that may be caused by manual operation. It is especially suitable for unattended or hard-to-access power distribution sites.

[0014] 2. In this utility model, the entire device can be easily and securely installed and disassembled by rotating the knob. The first anti-slip pad and the second protective pad not only enhance the friction but also prevent scratches on the circuit breaker housing, ensuring that the device will not loosen under long-term vibration environment, and the installation is convenient and quick. Attached Figure Description

[0015] Figure 1 This is an overall schematic diagram of an automatic reclosing device for a DC fast circuit breaker proposed in this utility model. Figure 2 This is a cross-sectional schematic diagram of an automatic reclosing device for a DC fast circuit breaker proposed in this utility model; Figure 3 This is a schematic diagram of the lead screw of an automatic reclosing device for a DC fast circuit breaker proposed in this utility model.

[0016] Legend: 1. Circuit breaker body; 2. Knife switch; 3. Fixing bracket; 4. Opening; 5. Slide groove; 6. Limit rod; 7. Lifting plate; 8. Actuating plate; 9. Lead screw; 10. Mounting slot; 11. Servo motor; 12. Control box; 13. Cover plate; 14. First anti-slip pad; 15. Movable hole; 16. Movable rod; 17. Pressure plate; 18. Second protective pad; 19. Column; 20. Knob; 21. Bolt. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Reference Figures 1-3 This utility model provides an embodiment of an automatic reclosing device for a DC fast circuit breaker, comprising a circuit breaker body 1, a knife switch 2 installed at the front end of the circuit breaker body 1, a fixing frame 3 externally disposed at the front end of the circuit breaker body 1, an opening 4 on the rear side of the fixing frame 3, a sliding groove 5 formed at the middle of the front end of the fixing frame 3, a lifting plate 7 slidably connected inside the sliding groove 5, and limiting rods 6 passing through both ends of the lifting plate 7, the upper and lower ends of the limiting rods 6 being fixedly connected inside the fixing frame 3. A toggle plate 8 is fixedly connected to the rear side of the switch 2. The rear end of the toggle plate 8 is located on the lower side of the switch 2. A lead screw 9 is threadedly connected to the middle of the lifting plate 7. The upper and lower ends of the lead screw 9 are rotatably connected to the inside of the fixed frame 3. An installation groove 10 is opened on the front side of the upper end of the fixed frame 3. A servo motor 11 is fixedly connected to the front side of the inside of the installation groove 10. The drive end of the servo motor 11 is fixedly connected to the top of the lead screw 9. A control box 12 is fixedly connected to the rear side of the inner wall of the installation groove 10. A cover plate 13 is installed on the upper end of the inside of the installation groove 10.

[0019] When the external detection system issues a closing command, the control box 12 receives the signal and starts the servo motor 11. The servo motor 11 drives the lead screw 9 to rotate in the forward direction. Since the lead screw 9 and the middle of the lifting plate 7 are connected by a thread, and the left and right ends of the lifting plate 7 are constrained by the limit rods 6, they can only slide up and down. Therefore, the rotating lead screw 9 drives the lifting plate 7 to move smoothly upward along the slide groove 5 and the limit rods 6. The actuating plate 8 fixed on the rear side of the lifting plate 7 rises accordingly, acting on the lower side of the switch 2, pushing the switch 2 to rotate upward, thereby completing the circuit breaker closing process.

[0020] Reference Figures 1-3 A first anti-slip pad 14 is fixedly connected to the upper side of the lower end of the fixed frame 3. A movable hole 15 is opened at the upper rear end of the fixed frame 3. A movable rod 16 is movably connected inside the movable hole 15. A pressure plate 17 is fixedly connected to the lower end of the movable rod 16. A second protective pad 18 is fixedly connected to the lower side of the pressure plate 17. A column 19 is fixedly connected to the middle of the upper side of the pressure plate 17. The upper end of the column 19 is movably connected to the upper interior of the fixed frame 3. A knob 20 is rotatably connected to the upper rear end of the fixed frame 3. A bolt 21 is fixedly connected to the lower side of the knob 20. The lower end of the bolt 21 is threadedly connected to the upper interior of the column 19.

[0021] When fixing the device, the fixing bracket 3 is installed on the front side of the circuit breaker body 1, so that the opening 4 on its rear side fits over the outside of the circuit breaker body. By rotating the knob 20 at the upper end of the fixing bracket, the bolt 21 fixed thereto is rotated. The bolt 21 is threadedly engaged with the column 19 above the pressure plate 17, driving the pressure plate 17 to move downward along the movable rod 16 until the second protective pad 18 on its lower side is pressed against the upper surface of the circuit breaker body 1. At the same time, the first anti-slip pad 14 on the upper side of the lower end of the fixing bracket 3 also provides bottom support and anti-slip. Through this pressing mechanism, the entire fixing bracket 3 is stably fixed on the circuit breaker body 1.

[0022] Working principle: The device is installed on the front side of the circuit breaker body 1, and the knob 20 drives the bolt 21 to rotate. The rotating bolt 21 cooperates with the column 19, which drives the pressure plate 17 to move downward and press on the upper side of the circuit breaker body 1, thereby fixing the fixing frame 3 to the outside of the circuit breaker body 1. The external detection device sends a command to control the servo motor 11 to start. The servo motor 11 drives the lead screw 9 to rotate, thereby controlling the lifting plate 7 to move upward and driving the toggle plate 8 to move upward, thereby driving the switch 2 to rotate upward, thereby closing the circuit. After the circuit is closed, the servo motor 11 is started to drive the lead screw 9 to rotate in the opposite direction, controlling the lifting plate 7 and the toggle plate 8 to move downward and move to the lower end of the fixing frame 3.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic reclosing device for a DC fast circuit breaker, characterized in that, The circuit breaker includes a main body (1), a knife switch (2) is installed at the front end of the main body (1), a fixed frame (3) is provided on the front exterior of the main body (1), an opening (4) is provided on the rear side of the fixed frame (3), a sliding groove (5) is provided in the middle of the front end of the fixed frame (3), a lifting plate (7) is slidably connected to the inside of the sliding groove (5), a limiting rod (6) is provided on both the left and right ends of the lifting plate (7), the upper and lower ends of the limiting rod (6) are fixedly connected to the inside of the fixed frame (3), a toggle plate (8) is fixedly connected to the rear side of the lifting plate (7), the rear end of the toggle plate (8) is provided on the lower side of the knife switch (2), and a drive assembly for driving the lifting plate (7) to move up and down is provided inside the front end of the fixed frame (3).

2. The automatic reclosing device for a DC fast circuit breaker according to claim 1, characterized in that: The drive assembly includes a lead screw (9) threadedly connected to the middle of the lifting plate (7), and the upper and lower ends of the lead screw (9) are rotatably connected to the inside of the fixed frame (3).

3. The automatic reclosing device for a DC fast circuit breaker according to claim 1, characterized in that: The upper front side of the fixed frame (3) is provided with a mounting groove (10), and a servo motor (11) is fixedly connected to the front side of the inside of the mounting groove (10). The drive end of the servo motor (11) is fixedly connected to the top of the lead screw (9).

4. The automatic reclosing device for a DC fast circuit breaker according to claim 3, characterized in that: A control box (12) is fixedly connected to the rear side of the inner wall of the mounting groove (10), and a cover plate (13) is installed at the upper end of the inner wall of the mounting groove (10).

5. The automatic reclosing device for a DC fast circuit breaker according to claim 1, characterized in that: The upper side of the lower end of the fixing frame (3) is fixedly connected to the first anti-slip pad (14).

6. The automatic reclosing device for a DC fast circuit breaker according to claim 5, characterized in that: The upper rear end of the fixed frame (3) is provided with a movable hole (15), and a movable rod (16) is movably connected inside the movable hole (15). A pressure plate (17) is fixedly connected to the lower end of the movable rod (16), and a second protective pad (18) is fixedly connected to the lower side of the pressure plate (17).

7. The automatic reclosing device for a DC fast circuit breaker according to claim 6, characterized in that: A column (19) is fixedly connected to the upper middle part of the pressure plate (17), and the upper end of the column (19) is movably connected to the upper interior of the fixing frame (3).

8. The automatic reclosing device for a DC fast circuit breaker according to claim 7, characterized in that: A knob (20) is rotatably connected to the upper rear end of the fixing frame (3), and a bolt (21) is fixedly connected to the lower side of the knob (20). The lower end of the bolt (21) is threadedly connected to the upper end of the column (19).

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