A drop-out fuse

Abstract

The utility model relates to electric power maintenance technical field, and disclose a drop-out fuse, including insulating support, first branch, second branch, the first branch fixed setting is in one end of insulating support, the second branch fixed setting is in another end of insulating support, the bottom of first branch is provided with the fuse tube, one end of fuse tube is hinged with second branch, the bottom fixed setting of insulating support has the fixed link, one end fixed mounting of fixed link has the anti -fall frame, the outer surface of anti -fall frame is set up with the mounting groove. The utility model when fuse tube fuses, fuse tube can turn over outward along second branch, fuse tube can turn over to the surface of anti -fall board, and anti -fall board can reduce the turning angle of fuse tube, at the same time, anti -fall board can buffer the impact force received through shock absorber, plays a certain protective effect to fuse tube, thereby can reduce the abrasion of fuse tube and second branch hinged place, prolongs the service life of fuse tube.

Description

Technical Field

[0001] This utility model relates to the field of power operation and maintenance technology, and in particular to a drop-out fuse. Background Technology

[0002] A fuse is an electrical device that breaks the circuit by melting a fusible element when the current exceeds a specified value. Fuses are current protection devices that are made based on the principle that the fusible element melts due to the heat generated by the fuse itself after the current exceeds a specified value for a period of time, thereby breaking the circuit.

[0003] The invention disclosed in CN114038725B is a drop-out fuse, comprising an insulating support, a first arm, a second arm, a fuse tube, and multiple fuse wires. The first arm and the second arm are respectively fixedly disposed at two ends of the insulating support. The fuse tube includes a tube body, a stationary contact, and a moving contact. The stationary contact is fixedly connected to one end of the tube body and is hinged to the first arm. The fuse wires are tautly disposed within the tube body, with one end of the fuse wire fixedly connected to the end of the tube body near the stationary contact. A locking block is provided at the end of the fuse wire away from the stationary contact. A through hole is provided through the moving contact, and the cross-sectional area of ​​the locking block is larger than the cross-sectional area of ​​the through hole. The locking block is disposed at the moving contact. An elastic structure and a pressure block are provided at the end of the second arm, and the locking block can engage with the pressure block. The first arm, the second arm, the elastic structure, the pressure block, the stationary contact, the fuse wire, and the locking block are conductive.

[0004] Through the above technical solution, the inventors discovered at least the following problems: the stationary contact on the fuse tube is hinged to the first arm, and when the fuse tube breaks, it can flip outward along the first arm. Due to the large flipping range and the lack of anti-fall protection design for the fuse tube, the hinge point between the stationary contact on the fuse tube and the first arm is prone to deformation and wear, which affects the normal use of the fuse tube in the later stage. Therefore, how to design a drop-out fuse has become a problem that we need to solve. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides the following technical solution: a drop-out fuse, comprising an insulating support, a first arm, and a second arm, wherein the first arm is fixedly disposed at one end of the insulating support, the second arm is fixedly disposed at the other end of the insulating support, and a fuse tube is disposed at the bottom of the first arm, one end of the fuse tube being hinged to the second arm.

[0006] A fixing rod is fixedly installed at the bottom of the insulating support. A fall arrestor is fixedly installed at one end of the fixing rod. An installation groove is opened on the outer surface of the fall arrestor. A shock absorber is fixedly installed on the inner wall of the installation groove opened inside the fall arrestor. An installation block is fixedly installed at the telescopic end of the shock absorber. A fall arrestor plate is provided on the outer side of the installation block. A quick-release assembly is provided between the fall arrestor plate and the installation block.

[0007] As an improvement to the above technical solution, the quick-release assembly includes a plug, a spring, and a semi-circular locking block. The plug is fixedly installed on the inner side of the fall arrestor plate. The mounting block has a slot adapted to the plug inside. The spring is fixedly installed inside the mounting block. One end of the spring is fixedly connected to the semi-circular locking block. The plug has a semi-circular slot adapted to the semi-circular locking block inside.

[0008] As an improvement to the above technical solution, a telescopic rod is fixedly installed on the inner wall of the mounting groove opened inside the fall arrestor, and the telescopic end of the telescopic rod is fixedly connected to the mounting block.

[0009] As an improvement to the above technical solution, an elastic rubber pad is fixedly installed on the outer side of the fall arrestor plate.

[0010] As an improvement to the above technical solution, sliders are fixedly installed on both sides of the semi-circular card block, and a groove adapted to the slider is opened inside the insertion block.

[0011] As an improvement to the above technical solution, a fixing seat is fixedly installed on one side of the insulating support.

[0012] As an improvement to the above technical solution, a shield is fixedly installed on the top of the fall arrestor plate, and the top of the fall arrestor frame is located inside the shield.

[0013] The beneficial effects of this utility model are:

[0014] 1. When the fusible tube breaks, the fusible tube can be flipped outward along the second arm and onto the surface of the anti-fall plate. The anti-fall plate can reduce the flipping angle of the fusible tube. At the same time, the anti-fall plate can buffer the impact force through the shock absorber, which plays a certain role in protecting the fusible tube. This can reduce the wear at the hinge of the fusible tube and the second arm and extend the service life of the fusible tube.

[0015] 2. When the fall arrestor needs to be replaced, the worker can directly pull out the fall arrestor. The insert on the fall arrestor can push the semi-circular locking block to squeeze the spring, thus allowing the fall arrestor to be pulled out directly. When installing the fall arrestor, the insert on the fall arrestor can be directly inserted into the slot opened inside the mounting block. The spring inside the mounting block can push the semi-circular locking block to press against the insert, thus quickly completing the installation and removal of the fall arrestor. The operation is simple and convenient. Attached Figure Description

[0016] Figure 1 This is a frontal cross-sectional view of the present invention.

[0017] Figure 2 This is a schematic cross-sectional view of the fall arrestor and shield of this utility model;

[0018] Figure 3 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0019] Reference numerals: 1. Insulating support; 2. First support arm; 3. Second support arm; 4. Fusible tube; 5. Fixing rod; 6. Fall arrestor; 7. Shock absorber; 8. Mounting block; 9. Fall arrestor plate; 10. Quick release assembly; 101. Insert block; 102. Spring; 103. Semi-circular locking block; 11. Telescopic rod; 12. Elastic rubber pad; 13. Slider; 14. Fixing seat; 15. Cover plate. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the following provides a more detailed description of the utility model. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the utility model.

[0021] like Figure 1-3 As shown, this utility model provides a technical solution: a drop-out fuse, including an insulating support 1, a first arm 2, and a second arm 3. The first arm 2 is fixedly disposed at one end of the insulating support 1, and the second arm 3 is fixedly disposed at the other end of the insulating support 1. A fuse tube 4 is disposed at the bottom of the first arm 2, and one end of the fuse tube 4 is hinged to the second arm 3. A fixing seat 14 is fixedly installed on one side of the insulating support 1, which can conveniently fix the insulating support 1 to external connecting parts, such as the bracket of a power distribution line or a power pole.

[0022] Please refer to Figure 1 and Figure 2 A fixing rod 5 is fixedly installed at the bottom of the insulating support 1. A fall arrestor 6 is fixedly installed at one end of the fixing rod 5. An installation groove is opened on the outer surface of the fall arrestor 6. A shock absorber 7 is fixedly installed on the inner wall of the installation groove. An installation block 8 is fixedly installed at the telescopic end of the shock absorber 7. A fall arrestor plate 9 is provided on the outer side of the installation block 8. An elastic rubber pad 12 is fixedly installed on the outer side of the fall arrestor plate 9. The elastic rubber pad 12 can prevent the fall arrestor plate 9 from hard collision with the fuse tube 4 and play a certain role in protecting the fuse tube 4. A shielding plate 15 is fixedly installed on the top of the fall arrestor plate 9. The top of the fall arrestor 6 is located inside the shielding plate 15. The shielding plate 15 can shield the fall arrestor 6 and reduce the impact of wind and sun on the fall arrestor 6 and its internal structure.

[0023] The inner wall of the mounting groove inside the fall arrestor 6 is fixedly installed with a telescopic rod 11. The telescopic end of the telescopic rod 11 is fixedly connected to the mounting block 8. The telescopic rod 11 can limit the movement range of the mounting block 8 and the fall arrestor 9, and reduce the shaking of the fall arrestor 9 when it moves.

[0024] Please refer to Figure 1 and Figure 3 A quick-release assembly 10, including a plug 101, a spring 102, and a semi-circular locking block 103, is provided between the fall arrestor plate 9 and the mounting block 8. The plug 101 is fixedly installed on the inner side of the fall arrestor plate 9. The mounting block 8 has a slot inside that matches the plug 101. The spring 102 is fixedly installed inside the mounting block 8, and one end of the spring 102 is fixedly connected to the semi-circular locking block 103. The plug 101 has a semi-circular groove inside that matches the semi-circular locking block 103. When replacing the fall arrestor plate 9, the worker can directly pull it out. The insert block 101 on the fall arrestor plate 9 can push the semi-circular locking block 103 to compress the spring 102, thus allowing the fall arrestor plate 9 to be pulled out directly. When installing the fall arrestor plate 9, the insert block 101 on the fall arrestor plate 9 can be directly inserted into the slot opened inside the mounting block 8. The spring 102 inside the mounting block 8 can push the semi-circular locking block 103 to press against the insert block 101, thus quickly completing the installation of the fall arrestor plate 9.

[0025] The semicircular block 103 has sliders 13 fixedly installed on both sides. The insert 101 has a groove inside that matches the sliders 13. The sliders 13 and the grooves can limit the movement range of the semicircular block 103 and make the semicircular block 103 move more smoothly.

[0026] The implementation principle of this utility model is as follows: When the fuse tube 4 melts, the fuse tube 4 can be flipped outward along the second support arm 3 and flipped onto the surface of the anti-fall plate 9. The anti-fall plate 9 can reduce the flipping angle of the fuse tube 4. At the same time, the anti-fall plate 9 can buffer the impact force through the shock absorber 7, which plays a certain protective role for the fuse tube 4, thereby reducing the wear at the hinge of the fuse tube 4 and the second support arm 3 and extending the service life of the fuse tube 4.

[0027] When the fall arrestor 9 needs to be replaced, the worker can directly pull the fall arrestor 9 outward. The insert block 101 on the fall arrestor 9 can push the semi-circular locking block 103 to compress the spring 102, so that the fall arrestor 9 can be pulled outward directly. When installing the fall arrestor 9, the insert block 101 on the fall arrestor 9 can be directly inserted into the slot opened inside the mounting block 8. The spring 102 inside the mounting block 8 can push the semi-circular locking block 103 to press against the insert block 101, so that the installation and removal of the fall arrestor 9 can be completed quickly.

[0028] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A drop-out fuse, characterized in that, It includes an insulating support (1), a first support arm (2), and a second support arm (3). The first support arm (2) is fixedly installed at one end of the insulating support (1), and the second support arm (3) is fixedly installed at the other end of the insulating support (1). A fusion tube (4) is provided at the bottom of the first support arm (2), and one end of the fusion tube (4) is hinged to the second support arm (3). A fixing rod (5) is fixedly installed at the bottom of the insulating support (1). A fall arrestor (6) is fixedly installed at one end of the fixing rod (5). An installation groove is opened on the outer surface of the fall arrestor (6). A shock absorber (7) is fixedly installed on the inner wall of the installation groove opened inside the fall arrestor (6). An installation block (8) is fixedly installed at the telescopic end of the shock absorber (7). A fall arrestor plate (9) is provided on the outer side of the installation block (8). A quick-release assembly (10) is provided between the fall arrestor plate (9) and the installation block (8).

2. A drop-out fuse according to claim 1, characterized in that: The quick-release assembly (10) includes a plug (101), a spring (102), and a semi-circular locking block (103). The plug (101) is fixedly installed on the inner side of the fall arrestor plate (9). The mounting block (8) has a slot inside that matches the plug (101). The spring (102) is fixedly installed inside the mounting block (8). One end of the spring (102) is fixedly connected to the semi-circular locking block (103). The plug (101) has a semi-circular slot inside that matches the semi-circular locking block (103).

3. A drop-out fuse according to claim 1, characterized in that: A telescopic rod (11) is fixedly installed on the inner wall of the mounting groove opened inside the fall arrestor (6), and the telescopic end of the telescopic rod (11) is fixedly connected to the mounting block (8).

4. A drop-out fuse according to claim 1, characterized in that: An elastic rubber pad (12) is fixedly installed on the outer side of the fall arrestor plate (9).

5. A drop-out fuse according to claim 2, characterized in that: The semi-circular card block (103) has sliders (13) fixedly installed on both sides, and the insert block (101) has a groove inside that is adapted to the sliders (13).

6. A drop-out fuse according to claim 1, characterized in that: A fixing seat (14) is fixedly installed on one side of the insulating support (1).

7. A drop-out fuse according to claim 1, characterized in that: A shield (15) is fixedly installed on the top of the fall arrestor plate (9), and the top of the fall arrestor frame (6) is located inside the shield (15).

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