Enclosed fuse

Abstract

The utility model relates to the technical field of lightning arrester accessories, and particularly discloses a closed fuse which comprises an installation box, two contact columns are arranged on the inner bottom face of the installation box through a rebound assembly, a rotating column is installed on the upper side of one end of the installation box through threads, and a transposition column is installed at the end, located in the installation box, of the rotating column. The outer ring surface of the transposition column is provided with a plurality of safety pieces, and the safety pieces located on the lower side of the transposition column abut against the upper end of the contact column. According to the utility model, after the fuse piece located at the lower side is fused, the subsequent fuse piece can be driven by the transposition column to rotate to the contact column to carry out fusing protection again, that is, a worker can rapidly and continuously carry out fusing protection on a line temporarily without replacing the fuse piece, so that compared with a traditional scheme, the scheme has the advantages that the safety is greatly improved, and the working efficiency is improved. And the normal work of the fuse can be recovered more quickly and easily.

Description

Technical Field

[0001] The utility model relates to the technical field of fuses, in particular to a closed fuse. Background Art

[0002] In order to ensure the safety of electricity use, the power system usually needs to be equipped with different types of accidental protection devices, such as circuit breakers and fuses, which can also be called insurances. The existing Chinese patent with application number: 202220836233.5 discloses a sealed fast fuse, including a fuse base and a fuse cover. A connecting conductive sheet is provided at the bottom surface of the fuse cover near the left and right sides, a fuse mounting sleeve is provided between the connecting conductive sheets, a fuse is provided at the inner side of the fuse mounting sleeve, and a conductive base matching the connecting conductive sheet is provided at the inner bottom surface of the fuse base.

[0003] When the above technology is used, a certain degree of protection effect is achieved for the fuse by installing a mounting sleeve on the outside of the fuse. However, in actual use, due to the cumbersome installation steps of the fuse, it is inconvenient to replace it, and each time the fuse blows, it needs to be opened and reinstalled before it can be used again, which makes the fuse inconvenient to use. Therefore, in order to solve the above technical defects, we propose a closed fuse. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a closed fuse.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A closed fuse includes a mounting box, wherein the inner bottom surface of the mounting box is provided with two contact columns through a rebound assembly, a rotating column is threadedly installed on the upper side of one end of the mounting box, a transposition column is installed at one end of the rotating column located inside the mounting box, a plurality of fuse plates are installed on the outer ring surface of the transposition column, and the fuse plates located on the lower side of the transposition column abut against the upper end of the contact column.

[0007] Preferably, the rebound assembly includes a mounting tube, a linkage tube and a top spring, the lower end of the linkage tube is slidably mounted inside the mounting tube, the upper end of the linkage tube is connected to an adjacent contact column, and the top spring is arranged between the linkage tube and the mounting tube.

[0008] Preferably, a storage cavity is provided at one end of the rotating column away from the transposition column, and a rotating plate is slidably provided in the storage cavity.

[0009] Preferably, a mounting groove is provided at one end of the rotating plate located outside the rotating column, and a force plate is provided in the mounting groove.

[0010] Preferably, a shielding cover is sleeved on the upper side of the outer annular surface of the transposition column, and two sides of the shielding cover are connected to the inner wall of the installation box through connecting protrusions.

[0011] Preferably, a positioning rod is slidably provided inside one end of the transposition column away from the rotating column, and one end of the positioning rod located outside the transposition column is installed on the inner wall of the installation box.

[0012] Preferably, a cover plate is installed on the upper side of the installation box by screws, and a sealing ring is provided on one end of the outer ring surface of the transposition column close to the rotating column, and the sealing ring is connected to the installation box through a mounting ring.

[0013] The utility model provides a closed type fuse, which has the following beneficial effects:

[0014] 1: In the utility model, when the transposition column rotates, each fuse piece installed on the outer ring surface of the transposition column is rotated to the lower side in turn and contacts with the end of the contact column on the lower side. Therefore, through the mutual cooperation of the above-mentioned components, when the fuse piece located below the transposition column is triggered and fused, the personnel only needs to rotate the rotating column to drive the subsequent fuse pieces to rotate to the contact column through the transposition column for another fuse protection, that is, the personnel can quickly continue to perform fuse protection on the line without replacing the fuse piece temporarily, so that compared with the traditional solution, this solution can restore the normal operation of the fuse more quickly and easily. At the same time, when all the fuse pieces on the outer ring surface of the transposition column are used up, the rotating column is directly rotated to take the transposition column out of the installation box, and a new transposition column can be replaced. Therefore, compared with the traditional solution, this solution has better fuse pieces, is more convenient and labor-saving, and the fuse can be restored to use more quickly.

[0015] 2: The setting of the rebound component in the utility model enables the top spring to push the contact column through the linkage cylinder and move it upward a certain distance, that is, the top spring pushes the contact column to move toward the adjacent safety plate, thereby ensuring that the contact column and the safety plate have a better connection tightness; the setting of the rotating plate facilitates personnel to rotate and control the rotating column, and the setting of the force plate makes it easier for personnel to rotate the rotating column, and the setting of the storage cavity also facilitates the storage and hiding of the rotating plate and the force plate. The setting of the shielding cover can shield the safety plates whose outer annular surface of the transposition column is not in contact with the contact column, thereby providing a certain degree of protection for the remaining safety plates and a positioning effect for the transposition seat; the setting of the positioning rod improves the stability of the transposition column. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an axonometric schematic diagram of an enclosed fuse proposed by the utility model;

[0017] Figure 2 A schematic diagram of the cooperation between a shielding cover and a mounting box of a closed fuse proposed by the utility model;

[0018] Figure 3 This is a structural schematic diagram of a closed fuse proposed by the utility model;

[0019] Figure 4 A schematic diagram of the coordination between the contact column and the fuse piece of a closed fuse proposed by the utility model;

[0020] Figure 5 This is a schematic diagram of the separation of the contact column and the fuse piece of a closed fuse proposed by the utility model;

[0021] Figure 6 The utility model provides a schematic diagram of the fuse piece of a closed fuse being blown.

[0022] In the figure: 1. installation box; 2. contact column; 3. rotating column; 4. transposition column; 5. safety plate; 6. installation cylinder; 7. linkage cylinder; 8. top spring; 9. rotating plate; 10. force plate; 11. shielding cover; 12. positioning rod; 13. cover plate. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Example 1

[0025] Reference Figure 1-6 A closed fuse comprises an installation box 1, the inner bottom surface of the installation box 1 is provided with two contact posts 2 through a rebound assembly, a rotating post 3 is threadedly installed on the upper side of one end of the installation box 1, a transposition post 4 is installed on one end of the rotating post 3 located inside the installation box 1, a plurality of safety pieces 5 are installed on the outer ring surface of the transposition post 4, and the safety piece 5 located on the lower side of the transposition post 4 abuts against the upper end of the contact post 2. Since the rotating post 3 and the installation box 1 are threadedly connected, when all the safety pieces 5 on the outer ring surface of the transposition post 4 are used up, the rotating post 3 is directly rotated to take the transposition post 4 out of the installation box 1 and replace it with a new transposition post 4. When the transposition post 4 is inserted, the arc-shaped protrusion at the end can conveniently squeeze the contact post 2 to ensure the tightness of the combination between the contact post 2 and the safety piece 5.

[0026] Example 2

[0027] Reference Figure 1-6 , when other parts are the same as those in Example 1, the difference between this embodiment and Example 1 is that:

[0028] The rebound assembly includes a mounting tube 6, a linkage tube 7 and a top spring 8. The lower end of the linkage tube 7 is slidably mounted inside the mounting tube 6, and the upper end of the linkage tube 7 is connected to the adjacent contact column 2. The top spring 8 is arranged between the linkage tube 7 and the mounting tube 6. The arrangement of the rebound assembly enables the top spring 8 to push the contact column 2 through the linkage tube 7 and move upward a certain distance, that is, the top spring 8 pushes the contact column 2 to move toward the adjacent safety plate 5, thereby enabling the contact column 2 to have a better connection tightness with the safety plate 5; a storage cavity is provided at one end of the rotating column 3 away from the transposition column 4, and a rotating plate 9 is slidably provided in the storage cavity. The arrangement of the rotating plate 9 facilitates personnel to rotate and control the rotating column 3; a mounting groove is provided at one end of the rotating plate 9 located outside the rotating column 3, and a force plate 10 is provided in the mounting groove. The arrangement of the force plate 10 makes it easier for personnel to rotate the rotating column 3, and the arrangement of the storage cavity also facilitates the storage and hiding of the rotating plate 9 and the force plate 10.

[0029] The upper side of the outer ring surface of the transposition column 4 is sleeved with a shielding cover 11, and the two sides of the shielding cover 11 are connected to the inner wall of the installation box 1 through connecting protrusions. The setting of the shielding cover 11 can shield the safety piece 5 on the outer ring surface of the transposition column 4 that is not in contact with the contact column 2, thereby providing a certain degree of protection effect on the remaining safety pieces 5 and a positioning effect on the transposition seat 4; the transposition column 4 is away from the inner sliding of one end of the rotating column 3 and is provided with a positioning rod 12. The end of the positioning rod 12 located outside the transposition column 4 is installed on the inner wall of the installation box 1. The setting of the positioning rod 12 improves the stability of the transposition column 4; a cover plate 13 is installed on the upper side of the installation box 1 by screws, and a sealing ring is provided on the end of the outer ring surface of the transposition column 4 close to the rotating column 3, and the sealing ring is connected to the installation box 1 through a mounting ring. The setting of the cover plate 13 and the sealing ring can make the installation box 1 and the cover plate 13 together form a relatively sealed box body, thereby facilitating more effective protection for its internal components.

[0030] When the switch is in use, the two contact posts 2 are connected to the external circuit through wires, and a plurality of fuse pieces 5 are installed on the outer ring surface of the transposition post 4, and the transposition post 4 is installed at the end of the rotating post 3, and the rotating post 3 is connected to the installation box 1 through a thread, so that when a person rotates the rotating post 3, the transposition post 4 can be driven to rotate synchronously and gradually move to the outside of the installation box 1 or to the inside of the installation box 1 under the action of the thread as the rotation occurs. When the transposition post 4 rotates, each fuse piece 5 installed on the outer ring surface of the transposition post 4 is rotated to the lower side in turn and contacts with the end of the contact post 2 on the lower side. Therefore, through the mutual cooperation of the above-mentioned parts, when the fuse piece 5 located below the transposition post 4 is triggered and melted, the person only needs to rotate the rotating post 3 to drive the subsequent fuse piece 5 to rotate to the contact post 2 through the transposition post 4 for another melting protection, that is, the person can temporarily continue to melt the line without replacing the fuse piece 5, so that compared with the traditional scheme, this scheme can restore the normal operation of the fuse more quickly and easily.

[0031] Furthermore, since the rotating column 3 and the installation box 1 are threadedly connected, when all the safety pieces 5 on the outer ring surface of the transposition column 4 are used up, the rotating column 3 is directly rotated to remove the transposition column 4 from the inside of the installation box 1 and replace it with a new transposition column 4. When the transposition column 4 is inserted, the arc-shaped protrusion at the end can conveniently squeeze the contact column 2 to ensure the tightness of the connection between the contact column 2 and the safety piece 5.

[0032] It should be further explained that the setting of the rebound component allows the top spring 8 to push the contact column 2 through the linkage tube 7 and move it upward by a certain distance, that is, the top spring 8 pushes the contact column 2 to move toward the adjacent safety plate 5, thereby making the contact column 2 have a better connection tightness with the safety plate 5; the setting of the rotating plate 9 is convenient for personnel to rotate and control the rotating column 3, and the setting of the force plate 10 makes it easier for personnel to rotate the rotating column 3, and the setting of the storage cavity is also convenient for storing and hiding the rotating plate 9 and the force plate 10, and the setting of the shielding cover 11 can shield the safety plate 5 whose outer ring surface of the transposition column 4 is not in contact with the contact column 2, thereby providing a certain degree of protection for the remaining safety plates 5 and a positioning effect for the transposition seat 4; the setting of the positioning rod 12 improves the stability of the transposition column 4; the setting of the cover plate 13 and the sealing ring can make the installation box 1 and the cover plate 13 together form a relatively sealed box body, thereby providing more effective protection for its internal components.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A closed fuse, comprising a mounting box (1), characterized in that: The inner bottom surface of the installation box (1) is provided with two contact columns (2) through a rebound assembly, a rotating column (3) is installed on the upper side of one end of the installation box (1) through a thread, a transposition column (4) is installed on one end of the rotating column (3) located inside the installation box (1), and a plurality of safety sheets (5) are installed on the outer ring surface of the transposition column (4), and the safety sheets (5) located on the lower side of the transposition column (4) abut against the upper end of the contact column (2).

2. A closed fuse according to claim 1, characterized in that: The rebound assembly comprises a mounting tube (6), a linkage tube (7) and a top spring (8); the lower end of the linkage tube (7) is slidably mounted inside the mounting tube (6); the upper end of the linkage tube (7) is connected to an adjacent contact column (2); and the top spring (8) is arranged between the linkage tube (7) and the mounting tube (6).

3. A closed fuse according to claim 1, characterized in that: A storage cavity is provided at one end of the rotating column (3) away from the transposition column (4), and a rotating plate (9) is slidably provided in the storage cavity.

4. A closed fuse according to claim 3, characterized in that: An end of the rotating plate (9) located outside the rotating column (3) is provided with a mounting groove, and a force adding plate (10) is provided in the mounting groove.

5. The enclosed fuse according to claim 1, characterized in that: A shielding cover (11) is sleeved on the upper side of the outer annular surface of the transposition column (4), and two sides of the shielding cover (11) are connected to the inner wall of the installation box (1) via connecting protrusions.

6. The enclosed fuse according to claim 1, characterized in that: A positioning rod (12) is slidably provided inside the transposition column (4) at one end away from the rotating column (3); one end of the positioning rod (12) located outside the transposition column (4) is mounted on the inner wall of the mounting box (1).

7. The enclosed fuse according to claim 1, characterized in that: A cover plate (13) is mounted on the upper side of the installation box (1) by means of screws, and a sealing ring is provided on one end of the outer ring surface of the transposition column (4) close to the rotating column (3), and the sealing ring is connected to the installation box (1) via a mounting ring.

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