CN219180463U

CN219180463U - Tightly sealed filler-free closed tube type fuse

Info

Publication number: CN219180463U
Application number: CN202320063904.3U
Authority: CN
Inventors: 吴锡春
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-01-10
Filing date: 2023-01-10
Publication date: 2023-06-13
Anticipated expiration: 2033-01-10

Abstract

The utility model relates to the technical field of low-voltage power grid distribution devices, in particular to a tightly sealed non-filler closed tube fuse which comprises a fiber fusion tube, a melt arranged in the fiber fusion tube and two slotting tools respectively and fixedly arranged at the left end and the right end of the melt, wherein slotting tool seats are fixedly sleeved at the left end and the right end of the fiber fusion tube, a pipe cap is sleeved on the outer wall screw thread of the slotting tool, a stop block is integrally formed on the outer wall of the slotting tool and positioned in the pipe cap, a cushion block is sleeved in the pipe cap, the slotting tools sequentially penetrate through the tool holder, the stop block, the cushion block and the pipe cap, a first sealing ring is arranged between the end surfaces of the cushion block and the pipe cap in a propping way, a second sealing ring is arranged between the cushion block and the stop block, and the first sealing ring and the second sealing ring are sleeved on the periphery of the slotting tool. The utility model has simple installation and convenient disassembly, realizes low-pressure static seal on two sides of the cushion block through the first sealing ring and the second sealing ring, and has tight seal and low manufacturing cost.

Description

Tightly sealed filler-free closed tube type fuse

Technical Field

The utility model relates to the technical field of distribution devices of a low-voltage power network, in particular to a tightly sealed filler-free closed tube type fuse.

Background

The packing-free closed tube type fuse is a detachable fuse, has the advantages of strong breaking capacity, good protection characteristic, convenient melt replacement, safe and reliable operation and the like, and is commonly used for occasions where overload and short circuit faults frequently occur as short circuit and overload protection of a low-voltage power grid and a complete power distribution device.

The utility model discloses a sealed tube type fuse with the publication number of CN205723405U, which comprises an insulating cylinder, a copper cap, a slotting tool and a melt, wherein the copper cap is provided with a serrated sealing mechanism, and a sealing bearing is pressed and sealed at the connecting end of the copper cap and the insulating cylinder. The utility model realizes two layers of sealing through the sealing mechanism and the sealing bearing, but the sealing bearing is rotary sealing, belongs to dynamic sealing, and has complex composition structure and mounting mode.

Disclosure of Invention

The utility model aims to provide a tightly sealed packing-free closed tube type fuse which solves the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a sealed no packing seals tubular fuse, includes the fiber fusion tube, locates the fuse-element in the fiber fusion tube to and fix respectively and locate two slotting tools at both ends about the fuse-element, the slotting tool seat has all been fixed to cup joint in both ends about the fiber fusion tube, the outer wall screw thread of slotting tool has cup jointed the pipe cap, just be located on the outer wall of slotting tool integrated into one piece has the dog in the pipe cap, the pipe cap endotheca is equipped with the cushion, slotting tool runs through in proper order and alternates blade holder, dog, cushion and pipe cap, the butt is equipped with first sealing washer between the terminal surface of cushion and pipe cap, the indirectional of cushion and dog is equipped with the second sealing washer, first sealing washer and second sealing washer all overlap and are located the periphery of slotting tool.

Optionally, a rectangular hole allowing the melt and the stop block to pass through left and right is formed in the end face of the plug seat, a round hole preventing the stop block from passing through left and right is formed in the end face of the plug seat, and the round hole is communicated with the rectangular hole.

Optionally, positioning holes are formed on the end face of the insert holder and located on the upper side and the lower side of the circular hole, and positioning blocks matched with the positioning holes are formed on the end face, close to the insert holder, of the cushion block.

Optionally, the dog is square, offer on the cushion be close to on the terminal surface of slotting tool seat and hold the square groove of dog, just be located on the cushion square groove has offered and has held the rectangle frame groove of second sealing washer.

Optionally, the cushion is circular, offer on the cushion and hold on the terminal surface of keeping away from the plug seat the circular arc recess of first sealing washer, circular arc recess internal fixation cover is equipped with elastic element, the first sealing washer is gone up and is kept away from the terminal surface of cap with elastic element's terminal surface butt.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model has simple installation and convenient disassembly, realizes low-pressure static seal on two sides of the cushion block through the first sealing ring and the second sealing ring, and has tight seal and low manufacturing cost;

2. according to the utility model, the block is prevented from rotating by the clamping relation of the cushion block and the block, so that the installation angle of the slotting tool is fixed, and the first sealing ring always presses the pipe cap by the elastic acting force provided by the elastic element, so that the gap between the first sealing ring and the pipe cap caused by ageing and failure of the first sealing ring is avoided.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is an enlarged schematic view of the portion A in FIG. 1;

FIG. 3 is a schematic view of the structure of the insert holder, insert and stop of the present utility model;

fig. 4 is a schematic structural diagram of a pad of the present utility model.

In the figure: 1. a fiber fusion pipe; 2. a melt; 3. a slotting tool; 4. a knife holder; 5. a tube cap; 6. a stop block; 7. a cushion block; 8. a first seal ring; 9. a second seal ring; 10. a rectangular hole; 11. a circular hole; 12. positioning holes; 13. a positioning block; 14. arc grooves; 15. an elastic element; 16. a square groove; 17. rectangular frame groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples: referring to fig. 1-4, the present utility model provides a tightly sealed, non-filled, closed tube fuse, which comprises a fiber fusion tube 1, a melt 2 disposed in the fiber fusion tube 1, and two blades 3 fixedly disposed at left and right ends of the melt 2, respectively. The left end and the right end of the fiber fusion pipe 1 are fixedly sleeved with a cutter seat 4, the outer wall of the cutter seat 4 is in threaded sleeve connection with a pipe cap 5, and a stop block 6 is integrally formed on the outer wall of the cutter 3 and positioned in the pipe cap 5. The inner sleeve of the pipe cap 5 is provided with a cushion block 7, the slotting tool 3 sequentially penetrates through the tool apron 4, the stop block 6, the cushion block 7 and the pipe cap 5, a first sealing ring 8 is abutted between the end faces of the cushion block 7 and the pipe cap 5, a second sealing ring 9 is abutted between the cushion block 7 and the stop block 6, and the first sealing ring 8 and the second sealing ring 9 are both sleeved on the periphery of the slotting tool 3.

The utility model has simple installation and convenient disassembly, realizes low-pressure static seal on two sides of the cushion block 7 through the first sealing ring 8 and the second sealing ring 9, and has tight seal and low manufacturing cost.

On the basis of the above embodiment, the stop 6 is square in this embodiment, the end surface of the insert holder 4 is provided with a rectangular hole 10 allowing the melt 2 and the stop 6 to pass through left and right, the end surface of the insert holder 4 is provided with a circular hole 11 preventing the stop 6 from passing through left and right, and the circular hole 11 is communicated with the rectangular hole 10. The slotting tool 3 is fixed with the melt 2 through bolts, the melt 2 and the slotting tool 3 can be horizontally inserted into the slotting tool holder 4 and the fiber fusion pipe 1 through the rectangular hole 10, and then the slotting tool 3 is rotated by 90 degrees, so that the stop block 6 is abutted with the end face of the slotting tool holder 4.

On the basis of the above embodiment, in this embodiment, the positioning holes 12 are formed on the end face of the cutter holder 4 and on the upper and lower sides of the circular hole 11, the positioning block 13 matching with the positioning holes 12 is formed on the end face of the cushion block 7 near the cutter holder 4, the square groove 16 for accommodating the stop block 6 is formed on the end face of the cushion block 7 near the cutter holder 4, and the rectangular frame groove 17 for accommodating the second seal ring 9 is formed on the cushion block 7 and in the square groove 16. After the slotting tool 3 rotates 90 degrees, the cushion block 7 can be placed on the slotting tool seat 4, the positioning block 13 stretches into the positioning hole 12 to prevent the cushion block 7 from rotating, and the block 6 is prevented from rotating through the clamping relation between the cushion block 7 and the block 6, so that the installation angle of the slotting tool 3 is fixed. The threaded connection of the insert seat 4 and the pipe cap 5 ensures that the stop block 6 and the cushion block 7 are fixed between the insert seat 4 and the pipe cap 5, and the length of the insert 3 extending into the fiber fusion pipe 1 is constant.

Based on the above embodiment, in this embodiment, the spacer 7 is circular, the end surface of the spacer 7 far away from the socket 4 is provided with an arc groove 14 for accommodating the first seal ring 8, the arc groove 14 is anastomotic with the first seal ring 8, an elastic element 15 is fixedly sleeved in the arc groove 14, the elastic element 15 is a cylindrical coil spring, and two ends of the elastic element 15 are respectively abutted with the end surface of the first seal ring 8 far away from the pipe cap 5 and the spacer 7. Because the slotting tool 3 runs through the pipe cap 5, a gap exists between the slotting tool 3 and the pipe cap 5, so that the first sealing ring 8 can be in direct contact with the outside, the first sealing ring 8 is easy to erode and age by the outside, the first sealing ring 8 can always extrude the pipe cap 5 through the elastic acting force provided by the elastic element 15, and the gap exists between the first sealing ring 8 and the pipe cap 5 due to the aging failure of the first sealing ring 8 is avoided.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a sealed no packing seals tubular fuse, includes fiber fusion tube (1), locates fuse-element (2) in fiber fusion tube (1), and fixed two slotting tools (3) of locating respectively both ends about fuse-element (2), its characterized in that: the fiber fusion pipe (1) is fixed around both ends and has been cup jointed plug seat (4), the outer wall screw thread of plug seat (4) has cup jointed pipe cap (5), just be located on the outer wall of plug seat (3) integrated into one piece has dog (6) in pipe cap (5), pipe cap (5) endotheca is equipped with cushion (7), plug seat (4), dog (6), cushion (7) and pipe cap (5) are tubular in proper order in plug seat (3), the butt is equipped with first sealing washer (8) between the terminal surface of cushion (7) and pipe cap (5), be equipped with second sealing washer (9) between cushion (7) and the dog (6), first sealing washer (8) and second sealing washer (9) are all overlapped and are located the periphery of plug seat (3).

2. A hermetically sealed, non-filled, closed tube fuse in accordance with claim 1 wherein: the stopper (6) is square, rectangular holes (10) allowing the melt (2) and the stopper (6) to pass through left and right are formed in the end face of the cutter holder (4), round holes (11) preventing the stopper (6) from passing through left and right are formed in the end face of the cutter holder (4), and the round holes (11) are communicated with the rectangular holes (10).

3. A hermetically sealed, non-filled, closed tube fuse in accordance with claim 2 wherein: positioning holes (12) are formed in the end face of the slotting tool seat (4) and located on the upper side and the lower side of the circular hole (11), and positioning blocks (13) matched with the positioning holes (12) are formed in the end face, close to the slotting tool seat (4), of the cushion block (7).

4. A hermetically sealed, non-filled, closed tube fuse in accordance with claim 3 wherein: square grooves (16) for accommodating the stop blocks (6) are formed in the end faces, close to the cutter inserting seat (4), of the cushion blocks (7), and rectangular frame grooves (17) for accommodating the second sealing rings (9) are formed in the cushion blocks (7) and located in the square grooves (16).

5. A hermetically sealed, non-filled, closed tube fuse in accordance with claim 1 wherein: the cushion block (7) is circular, an arc groove (14) for accommodating the first sealing ring (8) is formed in the end face, far away from the plug seat (4), of the cushion block (7), an elastic element (15) is fixedly sleeved in the arc groove (14), and the end face, far away from the pipe cap (5), of the first sealing ring (8) is abutted to the end face of the elastic element (15).