Drop-out fuse

Abstract

The utility model relates to the field of fuses, in particular to a drop-out fuse, which comprises an insulating porcelain body and a fusion tube connected onto the insulating porcelain body. The fusion tube is provided with a pull ring mechanism used for hanging. The pull ring mechanism comprises a pull ring body connected to the fusion tube; an avoiding notch is formed in the pull ring body; the pull ring body is of an arc-shaped plate structure. The utility model discloses a drop-out fuse. According to the utility model, through the design of the open-type pull ring body, an insulating rod can conveniently enter the pull ring subsequently; and therefore, the difficulty of pulling the fusion tube by an operator during subsequent use can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of fuses, in particular to a drop-out type fuse. Background Art

[0002] The outdoor drop-out fuses currently in use are used in overhead power distribution systems to provide overcurrent protection, fault current protection, and visible indication of fuse operation.

[0003] Because it has an intuitive visible fracture and can act as a load switch to disconnect the load current when used with a load disconnecting tool, it creates a safe working environment for line inspection and equipment maintenance and is widely used.

[0004] It is commonly used in 10kV distribution lines, high-voltage side and low-voltage side of transformers, providing workers with obvious disconnection points when working on lines or transformers. It is also a safety measure to protect lines and transformers from overload.

[0005] In the current operation of drop-out fuses, since the installation height of drop-out fuses is generally high in the air, during operation, the operator needs to hold an insulating rod and stand directly below the drop-out fuse, insert the top of the insulating rod into the pull ring from the side, and then open or close the drop-out fuse.

[0006] The traditional pull ring is a closed circular ring structure. Therefore, when the insulating rod is inserted into the closed circular ring by manual operation, it is very difficult to insert the insulating rod into the pull ring because the overall size of the pull ring is small and the normal length of the insulating rod is large. At the same time, the efficiency is low.

[0007] For example, the pull ring structure disclosed in Patent 202010056307.9-Drop-Type Fuse.

[0008] Therefore, in order to improve or solve at least one of the above problems, it is necessary to optimize the design of the existing pull ring structure. Utility Model Content

[0009] The utility model aims to provide a novel drop-out fuse which is convenient for hanging an insulating rod.

[0010] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0011] A drop-out fuse includes an insulating porcelain body and a fuse tube connected to the insulating porcelain body;

[0012] The fusion tube is provided with a pull ring mechanism for hanging; the pull ring mechanism comprises a pull ring body connected to the fusion tube; the pull ring body is provided with an avoidance notch;

[0013] The pull ring body is an arc-shaped plate structure.

[0014] The pull ring body is connected to the melting tube through a connecting part, and the connecting part includes a connecting block arranged on the melting tube, the connecting block is sleeved on the melting tube, and the connecting block is connected to the pull ring body through a connecting column; a threaded hole is provided on the connecting block; an external thread is provided on the connecting column; the connecting column and the connecting block are connected by threads.

[0015] The connecting block comprises two clamp arc plates arranged opposite to each other; the ends of the clamp arc plates are provided with semi-arc holes; the semi-arc holes on the two clamp arc plates are arranged opposite to each other to form the above-mentioned threaded hole;

[0016] Each of the clamp arc plates comprises a middle arc plate and side ear plates arranged at both ends of the middle arc plate; the two clamp arc plates are connected by bolts.

[0017] The melting tube comprises a melting tube body, and a clamping sink groove is arranged on the melting tube body.

[0018] The inner wall of the clamp arc plate is provided with a clamping convex point.

[0019] A limiting groove is arranged in the clamping groove; and the clamping protrusions on the inner wall of the clamp arc plate correspond to the limiting groove in the clamping groove.

[0020] The advantages of the utility model are:

[0021] The utility model discloses a drop-out type fuse; the utility model facilitates the subsequent entry of an insulating rod into the pull ring through an open pull ring body design.

[0022] The drop-out fuse provided by the utility model has a simple structure and makes full use of the matching advantages of the top end of the insulating rod and the fuse tube, so that the operator does not need to find the exact position of the open pull ring when operating on the ground, and can easily send the insulating rod into the open pull ring for pulling and closing operations, so that the convenience and reliability of operating the drop-out fuse with the open pull ring are greatly improved, the time for operating the drop-out fuse with the open pull ring is shortened, and the work efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following is a brief description of the contents expressed in each of the drawings of the utility model specification and the marks in the drawings:

[0024] Figure 1 It is a structural schematic diagram of the utility model.

[0025] Figure 2 It is a structural schematic diagram of the drop-out fuse of the utility model when the pull-ring mechanism is not connected.

[0026] Figure 3 It is a top view of the pull ring mechanism in the utility model.

[0027] Figure 4 It is the front view of the arc plate of the clamp in the utility model.

[0028] The marks in the above figure are:

[0029] 1. Insulating porcelain body, 2. Melting tube, 3. Pull ring body, 4. Connecting column, 5. Connecting block. DETAILED DESCRIPTION

[0030] The specific implementation methods of the present utility model will be further explained in detail below by describing the optimal embodiments with reference to the accompanying drawings.

[0031] A drop-out fuse comprises an insulating porcelain body 1 and a melting tube 2 connected to the insulating porcelain body 1; the melting tube 2 is provided with a pull ring mechanism for hanging; the pull ring mechanism comprises a pull ring body 3 connected to the melting tube 2; the pull ring body 3 is provided with an avoidance notch 31; the pull ring body 3 is an arc-shaped plate structure; the utility model discloses a drop-out fuse; the utility model facilitates the subsequent entry of an insulating rod into the pull ring through the design of an open pull ring body 3; the drop-out fuse provided by the utility model has a simple structure and makes full use of the matching advantage between the top end of the insulating rod and the melting tube 2, so that the operator does not need to find the exact position of the open pull ring when operating on the ground, and can easily send the insulating rod into the open pull ring for pulling and closing operations, so that the convenience and reliability of operating the drop-out fuse with an open pull ring are greatly improved, the time for operating the drop-out fuse with an open pull ring is shortened, and the work efficiency is improved.

[0032] The setting of the pull ring mechanism of the utility model enables the pull ring body 3 to have an opening, which is convenient for subsequent use with the insulating rod; the insulating rod can be easily inserted into the pull ring body 3, avoiding the trouble of the traditional ring pull ring that requires the end of the insulating rod to be hooked and inserted into the pull ring from the side.

[0033] The drop-out fuse disclosed in the utility model mainly comprises an insulating porcelain body 1 and a melting tube 2 connected to the insulating porcelain body 1; the insulating porcelain body 1 and the melting tube 2 are mainly existing structures and are not described in detail here, and a pull ring mechanism for hanging is provided on the melting tube 2; the setting of the pull ring mechanism is convenient for subsequent use with an insulating rod, and at the same time, in the utility model, the pull ring mechanism comprises a pull ring body 3 connected to the melting tube 2; the pull ring body 3 is provided with an avoidance notch 31; the pull ring body 3 is an arc plate structure; such a setting makes the pull ring body 3 have an opening, that is, the pull ring body 3 is not a closed ring structure, which is convenient for subsequent use with an insulating rod.

[0034] Furthermore, in the utility model, the pull ring body 3 is connected to the melting tube 2 through a connecting portion, and the setting of the connecting portion facilitates the connection between the pull ring body 3 and the melting tube 2; at the same time, in the utility model, the connecting portion includes a connecting block 5 arranged on the melting tube 2, the connecting block 5 is sleeved on the melting tube 2, and the connecting block 5 is connected to the pull ring body 3 through a connecting column 4; based on such a setting, the connecting block 5 is sleeved on the melting tube 2, and the connecting block 5 is fixed on the melting tube 2; and the connecting block 5 is provided with a threaded hole; the connecting column 4 is provided with an external thread; the connecting column 4 is connected to the connecting block 5 through a thread; the connecting column 4 plays a good bridging role, and the connecting column 4 is fixedly connected to the pull ring body 3; the subsequent pull ring body 3 is inserted into the threaded hole through the connecting column 4, which facilitates the connection between the pull ring body 3 and the melting tube 2.

[0035] In addition, in the present invention, the connecting column 4 and the connecting block 5 are connected by threads, and in subsequent use, the opening direction of the pull ring body 3 can be changed as needed, which is convenient for practical use.

[0036] Furthermore, in the utility model, the connecting block 5 includes two relatively arranged clamp arc plates 51; the ends of the clamp arc plates 51 are provided with semi-arc holes 513; the semi-arc holes 513 on the two clamp arc plates 51 are relatively arranged to form the above-mentioned threaded holes; each of the clamp arc plates 51 includes a middle arc plate 511 and side ear plates 512 arranged at both ends of the middle arc plate 511; the two clamp arc plates 51 are connected by bolts; based on such a setting, the connection of the connecting block 5 on the melting tube 2 is facilitated. During the actual connection, the clamp arc plates 51 are butt-arranged and subsequently entered by bolts. After the connection of the connecting block 5 is completed, the pull ring body 3 is inserted into the threaded hole through the connecting column 4, and then the pull ring mechanism is installed on the melting tube 2.

[0037] Furthermore, in the utility model, the melting tube 2 includes a melting tube body, and the melting tube body is provided with a clamping groove 6; in subsequent use, the connecting block 5 is arranged in the clamping groove 6. Such a setting can limit the relative position of the melting tube 2 and the connecting block 5, and prevent the connecting block 5 from moving along the axial direction of the melting tube 2.

[0038] Furthermore, in the utility model, a clamping protrusion 7 is provided on the inner wall of the clamping arc plate 51; a limiting groove 8 is provided in the clamping groove 6; the clamping protrusion 7 on the inner wall of the clamping arc plate 51 and the limiting groove 8 in the clamping groove 6 correspond to each other; based on such a setting, the stability of the arrangement of the connecting block 5 in the clamping groove 6 can be better guaranteed, and the connecting block 5 can be prevented from rotating relative to the melting tube 2.

[0039] Obviously, the specific implementation of the present invention is not limited by the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. A drop-out fuse, characterized in that: It includes an insulating porcelain body and a melting tube connected to the insulating porcelain body; The fusion tube is provided with a pull ring mechanism for hanging; the pull ring mechanism comprises a pull ring body connected to the fusion tube; the pull ring body is provided with an avoidance notch; The pull ring body is an arc-shaped plate structure.

2. A drop-out fuse according to claim 1, characterized in that: The pull ring body is connected to the melting tube through a connecting part, and the connecting part includes a connecting block arranged on the melting tube, the connecting block is sleeved on the melting tube, and the connecting block is connected to the pull ring body through a connecting column; a threaded hole is provided on the connecting block; an external thread is provided on the connecting column; the connecting column and the connecting block are connected by threads.

3. A drop-out fuse according to claim 2, characterized in that: The connecting block comprises two clamp arc plates arranged opposite to each other; the ends of the clamp arc plates are provided with semi-arc holes; the semi-arc holes on the two clamp arc plates are arranged opposite to each other to form the above-mentioned threaded hole; Each of the clamp arc plates comprises a middle arc plate and side ear plates arranged at both ends of the middle arc plate; The two clamp arc plates are connected by bolts.

4. A drop-out fuse according to claim 3, characterized in that: The melting tube comprises a melting tube body, and a clamping sink groove is arranged on the melting tube body.

5. A drop-out fuse according to claim 4, characterized in that: The inner wall of the clamp arc plate is provided with a clamping convex point.

6. A drop-out fuse according to claim 5, characterized in that: A limiting groove is arranged in the clamping groove; and the clamping protrusions on the inner wall of the clamp arc plate correspond to the limiting groove in the clamping groove.

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