All-insulation fuse

Abstract

The utility model discloses an all-insulation fuse, which relates to the technical field of fuses and comprises an insulation tube body, the tube walls at the two ends of the insulation tube body are fixedly connected with threaded bumps and are in threaded connection with a ceramic shell, the insulation tube body comprises a left half shell and a right half shell, the left half shell is clamped with the right half shell through a sealing clamping mechanism, and the right half shell is clamped with the ceramic shell through a sealing clamping mechanism. Two ends in a cavity of the right half shell are fixedly connected with limiting plate mounting devices, two ends in the cavity of the right half shell are fixedly connected with conductive clamping plates, the limiting plate mounting devices correspond to the conductive clamping plates in position, and the side walls of the conductive clamping plates at the two ends are fixedly connected with conductive wires. On the basis of facilitating rapid disassembly and replacing the internal damaged melt, rapid re-assembly is facilitated, so that the problems that according to an existing all-insulation fuse, the fuse is not convenient to rapidly open to replace the damaged melt in the cavity, and rapid re-assembly is not convenient are solved.

Description

Technical Field

[0001] This utility model relates to the field of fuse technology, specifically to a fully insulated fuse. Background Technology

[0002] Fully insulated fuses include fully insulated jet fuses and fully insulated tubular fuses. Their core function is to cut off the circuit by melting the fusible element, thereby protecting the circuit and equipment from damage caused by overload or short circuit faults. At the same time, the arc-extinguishing material inside the fuse tube is used to absorb the arc energy and quickly extinguish the arc.

[0003] Existing fully insulated fuses include various types such as jet type and tubular type. They mainly cut off the circuit by melting the internal fusible element. However, the fusible element is for single use, and the outer shell is usually sealed to enhance insulation. When the fusible element is used or damaged, it is not convenient to quickly open the fuse to replace the damaged fusible element inside the cavity, nor is it convenient to quickly reassemble it. Therefore, it is necessary to solve the problem that existing fully insulated fuses are not convenient for quickly opening the fuse to replace the damaged fusible element inside the cavity, nor for quick reassembly. Utility Model Content

[0004] In view of the problems existing in the current fully insulated fuse, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a fully insulated fuse that solves the problems of existing fully insulated fuses being inconvenient to quickly open the fuse to replace the damaged fuse element inside the cavity, and being inconvenient to quickly reassemble.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A fully insulated fuse includes an insulating tube body, with threaded protrusions fixedly connected to both ends of the tube body and a ceramic shell threadedly connected to it. The insulating tube body includes a left half shell and a right half shell. The left half shell is clamped to the right half shell by a sealing clamping mechanism. Both ends of the cavity of the right half shell are fixedly connected to an installation limiting plate device.

[0008] Conductive clamps are fixedly connected to both ends of the cavity of the right half shell. The mounting limiting plate device corresponds to the position of the conductive clamps. Conductive wires are fixedly connected to the side walls of the conductive clamps at both ends. The conductive wires at both ends are respectively fixedly connected to a first threaded conductive connector and a second threaded conductive connector. A molten sleeve device is threaded between the first threaded conductive connector and the second threaded conductive connector. An elastic mechanism is provided between the side wall of the first threaded conductive connector and the side wall of the right half shell. Mounting limiting collars are sleeved on both ends of the insulating tube. Mounting base plates are fixedly connected to the bottom of the mounting limiting collars at both ends.

[0009] Preferably, the sealing and snapping mechanism includes a slot, a rubber sealing block, an arc-shaped rubber block, and an arc-shaped rubber positioning and blocking ring. The slots are provided on both ends of the left half shell, and the sealing blocks are fixedly connected to both ends of the right half shell. The sealing blocks at both ends snap into the slots. Both ends of the left and right half shells are fixedly connected to rubber retaining rings for cable connections, and the positions of the rubber retaining rings for cable connections at both ends correspond.

[0010] Preferably, the elastic mechanism includes a connecting plate and a spring. The connecting plate is fixedly connected to the side wall of the first threaded conductive connector. Springs are fixedly connected to both ends of the side wall of the connecting plate. The other ends of the springs are fixedly connected to the inner side wall of the right half shell.

[0011] Preferably, the insulating tube body is composed of an epoxy resin outer shell and a quartz sand inner layer, and the inner wall of the epoxy resin outer shell is fixedly connected to the quartz sand inner layer.

[0012] Furthermore, the installation limiting plate device includes an insulating right base plate, bolts, an insulating left abutment plate, and nuts. Bolts are fixedly connected to both ends of the side wall of the insulating right base plate, and the insulating left abutment plate is inserted therein. The other ends of the bolts at both ends pass through the side wall of the insulating left abutment plate and are threaded with nuts. The conductive clamp is located between the insulating right base plate and the insulating left abutment plate.

[0013] Preferably, the melt sleeve device is cylindrical and has threaded mounting ports at both ends.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0015] This invention utilizes an insulating tube composed of a left and right half-shell that snaps together, facilitating the opening and replacement of the inner molten material. Ceramic shells at both ends, rotating on threaded protrusions, limit and fix the snap-on left and right half-shells, facilitating disassembly and reinstallation. Limiting plates at both ends secure the cable and conductive clamp together. A molten material sleeve device, threadedly connected to the first and second threaded conductive connectors, facilitates installation.

[0016] This utility model utilizes a slot on the right half-shell sidewall and a rubber sealing block on the left half-shell sidewall to seal and protect the connection between the left and right half-shells through mutual insertion. The arc-shaped rubber block is used to seal and protect the cable connection ports at both ends.

[0017] This invention utilizes springs installed at both ends of the side wall of the connecting plate to quickly separate and disconnect the first and second threaded conductive connectors at both ends by the springs contracting after the melt sleeve device melts. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a front structural cross-sectional view of the present invention;

[0021] Figure 3 This is a partial front structural cross-sectional view of the present invention;

[0022] Figure 4 This is a partial side structural cross-sectional view of the present invention.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Insulating tube body; 2. Threaded protrusion; 3. Ceramic shell; 4. Left half shell; 5. Right half shell; 6. Mounting limiting plate device; 7. Conductive clamp; 8. Conductive wire; 9. First threaded conductive connector; 10. Second threaded conductive connector; 11. Melt sleeve device; 12. Mounting limiting collar; 13. Mounting base plate; 14. Slot; 15. Rubber sealing block; 16. Arc-shaped rubber block; 17. Arc-shaped rubber positioning blocking ring; 18. Connecting plate; 19. Spring; 20. Epoxy resin shell; 21. Quartz sand inner layer; 22. Insulating right base plate; 23. Bolt; 24. Insulating left abutment plate; 25. Nut; 26. Threaded mounting port. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0026] This utility model discloses a fully insulated fuse.

[0027] This utility model provides, for example Figure 1-4 The fully insulated fuse shown includes an insulating tube 1. Threaded protrusions 2 are fixedly connected to both ends of the insulating tube 1, and a ceramic shell 3 is threadedly connected to it. The insulating tube 1 includes a left half shell 4 and a right half shell 5. The left half shell 4 is clamped to the right half shell 5 by a sealing clamping mechanism. Installation limiting plate devices 6 are fixedly connected to both ends of the cavity of the right half shell 5.

[0028] Conductive clamps 7 are fixedly connected to both ends of the cavity of the right half shell 5. The installation limiting plate device 6 corresponds to the position of the conductive clamps 7. Conductive wires 8 are fixedly connected to the side walls of the conductive clamps 7 at both ends. The conductive wires 8 at both ends are fixedly connected to the first threaded conductive connector 9 and the second threaded conductive connector 10 respectively. A melt sleeve device 11 is threaded between the first threaded conductive connector 9 and the second threaded conductive connector 10. An elastic mechanism is provided between the side wall of the first threaded conductive connector 9 and the side wall of the right half shell 5. Installation limiting collars 12 are sleeved on both ends of the insulating tube body 1. Installation base plates 13 are fixedly connected to the bottom of the installation limiting collars 12 at both ends. The insulating tube body 1, which is composed of the left half shell 4 and the right half shell 5, is designed to facilitate opening and replacement of the melt inside. The ceramic shells 3 at both ends rotate on the threaded protrusions 2, thereby engaging the left half shell 4. The cable and conductive clamp 7 are fixed together by limiting and fixing the right half shell 5. The cable and conductive clamp 7 are fixed together by using the limiting plate device 6 set at both ends. The fuse sleeve device 11 is threaded to the first threaded conductive connector 9 and the second threaded conductive connector 10 to facilitate installation. The installation limiting collar 12 and the installation base plate 13 are used to fix the insulating tube 1 to the installation point. In use, the first threaded conductive connector 9 and the second threaded conductive connector 10 are rotated to connect with the fuse sleeve device 11, and the cables at both ends are installed with the limiting plate device 6. Power is achieved by contacting the corresponding conductive clamp 7 and cooperating with the first threaded conductive connector 9 and the second threaded conductive connector 10. This solves the problem that the existing fully insulated fuse is not convenient to quickly open the fuse to replace the damaged fuse in the cavity, and is not convenient to quickly reassemble.

[0029] To achieve a seal after installation, such as Figure 1-4 As shown, the sealing and snapping mechanism includes a slot 14, a rubber sealing block 15, an arc-shaped rubber block 16, and an arc-shaped rubber positioning blocking ring 17. The slots 14 are provided on the side walls at both ends of the left half shell 4, and the sealing blocks 15 are fixedly connected to the side walls at both ends of the right half shell 5. The sealing blocks 15 at both ends snap into the slots 14. The ends of the left half shell 4 and the right half shell 5 are fixedly connected to rubber retaining rings for cable connections. The positions of the rubber retaining rings at the cable connections at both ends are corresponding. The slots 14 and the rubber sealing blocks 15 are used to seal and protect the connection between the left half shell 4 and the right half shell 5. The arc-shaped rubber blocks 16 are used to seal and protect the cable connections at both ends. The arc-shaped rubber positioning blocking rings 17 are used to block and position the ceramic shells 3 at both ends.

[0030] In order to quickly disconnect after the melt sleeve device 11 melts, such as Figure 2-4As shown, the elastic mechanism includes a connecting plate 18 and a spring 19. The connecting plate 18 is fixedly connected to the side wall of the first threaded conductive connector 9. Springs 19 are fixedly connected to both ends of the side wall of the connecting plate 18. The other ends of the springs 19 are fixedly connected to the inner side wall of the right half shell 5. By using the connecting plate 18 and the springs 19, after the melt sleeve device 11 melts, the first threaded conductive connector 9 and the second threaded conductive connector 10 at both ends are quickly separated and disconnected by the contraction of the springs 19.

[0031] In order to achieve the insulation and cooling functions of the insulating tube 1, such as Figure 2 and 3 As shown, the insulating tube 1 is composed of an epoxy resin outer shell 20 and a quartz sand inner layer 21. The quartz sand inner layer 21 is fixedly connected to the inner wall of the epoxy resin outer shell 20. The epoxy resin outer shell 20 is used to achieve the insulation function, and the quartz sand inner layer 21 is used to achieve the cooling function to quickly cool the generated electric arc.

[0032] To facilitate the installation of cables and conductive clamps 7, such as Figure 2 and 3 As shown, the installation limiting plate device 6 includes an insulating right base plate 22, bolts 23, an insulating left abutment plate 24, and a nut 25. Bolts 23 are fixedly connected to both ends of the side wall of the insulating right base plate 22, and the insulating left abutment plate 24 is inserted into it. The other end of the bolts 23 passes through the side wall of the insulating left abutment plate 24 and is threadedly connected to the nut 25. The conductive clamp 7 is located between the insulating right base plate 22 and the insulating left abutment plate 24. By using the insulating left abutment plate 24, which is inserted into the side wall of the bolts 23 at both ends, the cable is placed between the insulating right base plate 22 and the insulating left abutment plate 24, corresponding to the position of the conductive clamp 7. By rotating the nut 25 and moving it downward, the insulating left abutment plate 24 moves accordingly, pressing the cable onto the surface of the conductive clamp 7, thereby realizing the installation of the power supply and device.

[0033] To facilitate connection with the first threaded conductive connector 9 and the second threaded conductive connector 10, such as Figure 2-4 As shown, the melt sleeve device 11 is cylindrical and has threaded mounting ports 26 at both ends. By using the melt sleeve device 11, which is cylindrical and has threaded mounting ports 26 at both ends, it is easy to connect with the first threaded conductive connector 9 and the second threaded conductive connector 10.

[0034] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An all-insulated fuse comprising an insulating tube (1), characterized in that, Threaded lugs (2) are fixedly connected to both ends of the insulating pipe body (1), and a ceramic shell (3) is threadedly connected, the insulating pipe body (1) comprises a left half shell (4) and a right half shell (5), the left half shell (4) is clamped with the right half shell (5) through a sealing clamping mechanism, and mounting limiting plate devices (6) are fixedly connected to both ends of the cavity of the right half shell (5). Conductive clamping plates (7) are fixedly connected to both ends of the cavity of the right half shell (5), the mounting limiting plate devices (6) correspond in position to the conductive clamping plates (7), conductive wires (8) are fixedly connected to the side walls of both ends of the conductive clamping plates (7), first threaded conductive connectors (9) and second threaded conductive connectors (10) are respectively fixedly connected to both ends of the conductive wires (8), a melt sleeve device (11) is threadedly connected between the first threaded conductive connectors (9) and the second threaded conductive connectors (10), an elastic mechanism is arranged between the side wall of the first threaded conductive connector (9) and the side wall of the right half shell (5), mounting limiting sleeve rings (12) are sleeved at both ends of the insulating pipe body (1), and mounting bottom plates (13) are fixedly connected to the bottoms of both ends of the mounting limiting sleeve rings (12).

2. An all-insulated fuse according to claim 1, characterized in that, The sealing clamping mechanism comprises clamping grooves (14), rubber sealing clamping blocks (15), arc-shaped rubber clamping blocks (16) and arc-shaped rubber positioning blocking rings (17), the clamping grooves (14) are arranged in the side walls of both ends of the left half shell (4), the sealing clamping blocks (15) are fixedly connected to the side walls of both ends of the right half shell (5), the sealing clamping blocks (15) are clamped with the clamping grooves (14), and cable connection rubber rings are fixedly connected to both ends of the left half shell (4) and the right half shell (5) and correspond in position.

3. An all-insulated fuse according to claim 1, characterized in that, The elastic mechanism comprises connecting plates (18) and springs (19), the connecting plates (18) are fixedly connected to the side wall of the first threaded conductive connector (9), the springs (19) are fixedly connected to the side walls of both ends of the connecting plates (18), and the other ends of the springs (19) are fixedly connected to the inner side walls of the right half shell (5).

4. An all-insulated fuse according to claim 1, characterized in that, The insulating pipe body (1) is composed of an epoxy resin shell (20) and a quartz sand inner layer (21), and the quartz sand inner layer (21) is fixedly connected to the inner side wall of the epoxy resin shell (20).

5. An all-insulated fuse according to claim 1, characterized in that, The mounting limiting plate device (6) comprises an insulating right bottom plate (22), bolts (23), an insulating left abutting plate (24) and nuts (25), the bolts (23) are fixedly connected to the side walls of both ends of the insulating right bottom plate (22), the insulating left abutting plate (24) is inserted, the other ends of the bolts (23) pass through the side walls of the insulating left abutting plate (24), and the nuts (25) are threadedly connected, and the conductive clamping plate (7) is located between the insulating right bottom plate (22) and the insulating left abutting plate (24).

6. An all-insulated fuse according to claim 1, characterized in that, The melt sleeve device (11) is a cylindrical body, and threaded mounting openings (26) are arranged at both ends.

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