A drop-out fuse

Abstract

The application discloses a drop-out fuse, relates to the field of fuses, and comprises a fuse tube, a fuse in the fuse tube, a movable contact connected with the fuse, a pull ring fixedly installed on one side of the fuse tube, a shell arranged on the fuse tube, and a mounting seat fixedly installed at one end of the bottom of the fuse tube. The application controls a starting motor, the output end of the motor drives a screw rod to rotate, two sliding plates are driven to move close to each other through the screw rod with bidirectional threads, two first connecting rods, two second connecting rods, two L-shaped frames and two clamping plates are driven to move close to each other, the position of the fuse tube is positioned and fixed through the two clamping plates, the fuse tube is prevented from being affected by external weather and other conditions, further shaking and falling off are avoided, and the stability and firmness of the fuse tube after fusing are ensured.

Description

Technical Field

[0001] This application relates to the field of fuses, and more particularly to a drop-out fuse. Background Technology

[0002] Drop-out fuses are typically installed above transformers to protect against short circuits. Existing drop-out fuses consist of a fuse tube and a fuse wire inside the fuse tube. When a short circuit occurs, the fuse wire will melt due to high temperature. As the fuse wire melts, the fuse tube will rotate, and the moving contact at the upper end of the fuse tube will disconnect from the circuit.

[0003] A search revealed a Chinese patent with authorization announcement number CN116682712A, which discloses a drop-out fuse, including a fuse tube, a moving contact at the upper end of the fuse tube, a fuse inside the fuse tube, and an upper end of the fuse and the moving contact being electrically connected.

[0004] The drop-out fuse in the aforementioned patent has the following shortcomings: Although the device has a real-time monitoring function, which makes it convenient for staff to perform timely maintenance and repairs;

[0005] However, the device is still prone to fuse failure during use. When this occurs, the fuse tube will rotate and flip. At this time, the fuse tube is easily affected by the weather and may shake. It may also collide with or bump into wires and other components, thus making its safety and stability during use low. Utility Model Content

[0006] To further improve the stability and robustness of the fuse tube after it has been blown, this application provides a drop-out fuse.

[0007] The drop-out fuse provided in this application adopts the following technical solution: A drop-out fuse includes a fuse tube, a fuse wire inside the fuse tube is connected to a moving contact, a pull ring is fixedly installed on one side of the fuse tube, a housing is provided on the fuse tube, a mounting base is fixedly installed at one bottom end of the fuse tube, a connecting frame is provided on the mounting base, and a positioning mechanism for positioning and installing the fuse tube is provided on the connecting frame;

[0008] The positioning mechanism includes a housing fixedly mounted on a connecting frame. A screw is rotatably mounted inside the housing. Two sliding plates are symmetrically screwed onto the screw. A corresponding first connecting rod is fixedly mounted on one side of each of the two sliding plates. A corresponding second connecting rod is fixedly mounted on each of the two first connecting rods. A corresponding L-shaped frame is fixedly mounted on each of the two second connecting rods. A corresponding clamping plate is fixedly mounted on each of the two L-shaped frames. A motor is provided on one side of the housing. The output end of the motor passes through one side of the housing and is fixedly mounted to one end of the screw. The screw has a bidirectional thread.

[0009] By adopting the above technical solution, the motor is controlled to start the motor, which in turn drives the screw to rotate. The screw, with its bidirectional thread, drives the two sliding plates to move closer together. This movement of the two sliding plates causes the two first connecting rods, two second connecting rods, two L-shaped brackets, and two clamping plates to move closer together as well. The clamping plates then position and fix the fuse tube, preventing it from being affected by external weather conditions and thus avoiding any shaking or detachment. This ensures the stability and firmness of the fuse tube after it has melted.

[0010] Preferably, a fixing frame is fixedly installed on one side of the box body, and the motor is fixedly installed on the fixing frame.

[0011] By adopting the above technical solution and setting up a fixing frame, the installation can be assisted.

[0012] Preferably, the bottom of the box body has an opening, and both sliding plates are slidably installed inside the opening.

[0013] By adopting the above technical solution, the sliding plate can be limited and installed by setting the opening of the box.

[0014] Preferably, both clamps are arc-shaped and adapted to fit the fuse tube.

[0015] By adopting the above technical solution, and by setting both clamping plates to be arc-shaped and adapted to the fuse tube, it is easier to clamp and fix the installation.

[0016] Preferably, the connecting frame has a mounting hole, in which a rotating column is rotatably mounted, and the rotating column is fixedly mounted to the mounting base.

[0017] By adopting the above technical solution, the rotating column can be rotatably installed inside the mounting hole, thereby driving the mounting base to rotate.

[0018] Preferably, a top plate is fixedly installed on the connecting frame, a vertical pole is fixedly installed at the bottom of the top plate, a fixing rod is fixedly installed on one side of the vertical pole, and a contact sensor that contacts the movement trajectory of the fuse tube is provided on the fixing rod.

[0019] By adopting the above technical solution, positioning detection is performed through contact sensors, which facilitates clamping and fixing operations. Therefore, the convenience and flexibility of positioning and installation can be further improved, requiring less operation from staff and further reducing the labor intensity of staff.

[0020] Preferably, a controller is provided on one side of the pole, and the controller is connected to the contact sensor and the motor via signal connection.

[0021] By adopting the above technical solution, the controller is connected to the contact sensor and the motor via signal connection, thereby enabling control and drive.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. This application employs a combination of clamping plates and other components. By controlling the starter motor, the output of the motor drives the screw to rotate. The screw, with its bidirectional thread, causes two sliding plates to move closer together. This movement of the two sliding plates causes the two first connecting rods, two second connecting rods, two L-shaped brackets, and two clamping plates to move closer together as well. The two clamping plates then position and fix the fuse tube, preventing it from being affected by external weather conditions and thus avoiding any shaking or detachment. This ensures the stability and secureness of the fuse tube after it has melted.

[0024] 2. In this application, with the cooperation of contact sensors, the fuse tube is flipped through the mounting base and comes into contact with the contact sensor, thereby detecting its position through the contact sensor, which facilitates clamping and fixing operations. Therefore, it can further improve the convenience and flexibility of positioning and installation, requiring less operation from the staff and further reducing the labor intensity of the staff. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a drop-out fuse according to an embodiment of this application;

[0026] Figure 2 This is a schematic diagram illustrating the overall positioning structure, which is the main feature of this application embodiment.

[0027] Figure 3 This is a schematic diagram illustrating the adjustment part of the positioning structure, which is the main feature of this application embodiment;

[0028] Figure 4 This is a schematic diagram illustrating the positioning structure's arrival detection part, which is the main feature of this application's embodiment.

[0029] Reference numerals: 1. Fuse tube; 2. Moving contact; 3. Pull ring; 4. Housing; 5. Connecting frame; 6. Mounting base; 7. Mounting hole; 8. Rotating column; 9. Box body; 10. Top plate; 11. Box opening; 12. Screw; 13. Sliding plate; 14. First connecting rod; 15. Second connecting rod; 16. L-shaped frame; 17. Clamping plate; 18. Fixing frame; 19. Motor; 20. Upright pole; 21. Fixing rod; 22. Contact sensor; 23. Controller. Detailed Implementation

[0030] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0031] This application discloses a drop-out fuse.

[0032] Reference Figure 1-3 A drop-out fuse includes a fuse tube 1, a moving contact 2 connected to a fuse wire inside the fuse tube 1, a pull ring 3 fixedly installed on one side of the fuse tube 1, a housing 4 on the fuse tube 1, a mounting base 6 fixedly installed at one bottom end of the fuse tube 1, a connecting frame 5 on the mounting base 6, a positioning mechanism for positioning and installing the fuse tube 1 on the connecting frame 5, and a positioning detection mechanism on the positioning mechanism.

[0033] The positioning mechanism includes a box 9 fixedly mounted on a connecting frame 5. A screw 12 is rotatably mounted inside the box 9. Two sliding plates 13 are symmetrically screwed onto the screw 12. A corresponding first connecting rod 14 is fixedly mounted on one side of each of the two sliding plates 13. A corresponding second connecting rod 15 is fixedly mounted on each of the two first connecting rods 14. A corresponding L-shaped frame 16 is fixedly mounted on each of the two second connecting rods 15. A corresponding clamping plate 17 is fixedly mounted on each of the two L-shaped frames 16. A motor 19 is provided on one side of the box 9. The output end of the motor 19 passes through one side of the box 9 and is fixedly mounted to one end of the screw 12. The screw 12 is a bidirectional thread.

[0034] The box body 9 has a fixed bracket 18 on one side, a motor 19 fixedly mounted on the fixed bracket 18, a box opening 11 at the bottom of the box body 9, two sliding plates 13 slidably mounted in the box opening 11, and two clamping plates 17 are arc-shaped and adapted to the fuse tube 1.

[0035] In use, by controlling the start motor 19, the output end of the motor 19 will drive the screw 12 to rotate. The screw 12 with bidirectional thread will drive the two sliding plates 13 to move closer to each other. The two sliding plates 13 moving closer to each other will also drive the two first connecting rods 14, the two second connecting rods 15, the two L-shaped brackets 16 and the two clamping plates 17 to move closer to each other. The two clamping plates 17 can then position and fix the fuse tube 1, thereby preventing the fuse tube 1 from being affected by external weather conditions and causing it to shake and fall off. Therefore, the stability and firmness of the fuse tube 1 after melting can be ensured.

[0036] Reference Figure 2 and Figure 4The positioning detection mechanism includes mounting holes 7 on the connecting frame 5, rotating columns 8 are rotatably installed in the mounting holes 7, the rotating columns 8 are fixedly installed with the mounting base 6, a top plate 10 is fixedly installed on the connecting frame 5, a vertical rod 20 is fixedly installed at the bottom of the top plate 10, a fixing rod 21 is fixedly installed on one side of the vertical rod 20, a contact sensor 22 is provided on the fixing rod 21 that contacts the movement trajectory of the fuse tube 1, and a controller 23 is provided on one side of the vertical rod 20. The controller 23 is connected to the contact sensor 22 and the motor 19 for signal connection.

[0037] In use, the fuse tube 1 is flipped over by the mounting base 6 and comes into contact with the contact sensor 22, thereby detecting its position through the contact sensor 22, which facilitates clamping and fixing operations. Therefore, it can further improve the convenience and flexibility of positioning and installation, without requiring much operation from the staff, and further reduce the labor intensity of the staff.

[0038] In this application, the motor 19, the contact sensor 22, and the controller 23 are all prior art products. Therefore, the specific models and connection and usage processes are not described in detail. Furthermore, this application is a further optimization and improvement based on the prior art documents and is prior art. Therefore, the power supply method adopts prior art for connection and power supply.

[0039] The implementation principle of a drop-out fuse in this application embodiment is as follows: When a short circuit occurs in the circuit, the temperature of the fuse inside the fuse tube 1 will continue to rise. When the temperature of the fuse rises to a certain temperature, it will melt and break, thereby rotating the upper end of the fuse tube 1 and disconnecting it from the circuit, thus preventing dangerous situations from occurring.

[0040] At this time, the fuse tube 1 is flipped by the mounting base 6 and comes into contact with the contact sensor 22. The contact sensor 22 detects the position and then controls the start motor 19. The output of the motor 19 drives the screw 12 to rotate. The screw 12 with bidirectional thread drives the two sliding plates 13 to move closer to each other. The two sliding plates 13 moving closer to each other will also drive the two first connecting rods 14, the two second connecting rods 15, the two L-shaped brackets 16 and the two clamping plates 17 to move closer to each other. The two clamping plates 17 can then position and fix the fuse tube 1, thus preventing the fuse tube 1 from being affected by external weather conditions and falling off. Therefore, the stability and firmness of the fuse tube 1 after melting can be ensured.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A drop-out fuse, comprising a fuse tube (1), wherein a fuse wire inside the fuse tube (1) is connected to a moving contact (2), a pull ring (3) is fixedly installed on one side of the fuse tube (1), and a housing (4) is provided on the fuse tube (1), characterized in that: A mounting base (6) is fixedly installed at one bottom end of the fuse tube (1). A connecting frame (5) is provided on the mounting base (6). A positioning mechanism for positioning and installing the fuse tube (1) is provided on the connecting frame (5). The positioning mechanism includes a box (9) fixedly mounted on a connecting frame (5). A screw (12) is rotatably mounted inside the box (9). Two sliding plates (13) are symmetrically screwed onto the screw (12). A corresponding first connecting rod (14) is fixedly mounted on one side of each of the two sliding plates (13). A corresponding second connecting rod (15) is fixedly mounted on each of the two first connecting rods (14). A corresponding L-shaped frame (16) is fixedly mounted on each of the two second connecting rods (15). A corresponding clamping plate (17) is fixedly mounted on each of the two L-shaped frames (16). A motor (19) is provided on one side of the box (9). The output end of the motor (19) passes through one side of the box (9) and is fixedly mounted to one end of the screw (12). The screw (12) is a bidirectional thread.

2. The drop-out fuse according to claim 1, characterized in that: A fixing frame (18) is fixedly installed on one side of the box (9), and the motor (19) is fixedly installed on the fixing frame (18).

3. A drop-out fuse according to claim 1, characterized in that: The bottom of the box body (9) is provided with a box opening (11), and the two sliding plates (13) are slidably installed in the box opening (11).

4. A drop-out fuse according to claim 1, characterized in that: Both clamps (17) are arc-shaped and are adapted to fit the fuse tube (1).

5. A drop-out fuse according to claim 1, characterized in that: The connecting frame (5) has an installation hole (7), in which a rotating column (8) is rotatably installed, and the rotating column (8) is fixedly installed with the mounting base (6).

6. A drop-out fuse according to claim 1, characterized in that: A top plate (10) is fixedly installed on the connecting frame (5). A vertical pole (20) is fixedly installed at the bottom of the top plate (10). A fixing rod (21) is fixedly installed on one side of the vertical pole (20). A contact sensor (22) is provided on the fixing rod (21) to contact the movement trajectory of the fuse tube (1).

7. A drop-out fuse according to claim 6, characterized in that: A controller (23) is provided on one side of the pole (20), and the controller (23) is connected to the contact sensor (22) and the motor (19) by signal connection.

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