CN212542340U

CN212542340U - High-voltage drop-out fuse

Info

Publication number: CN212542340U
Application number: CN202021586405.5U
Authority: CN
Inventors: 赵培新; 赵小蓓; 郑如培; 赵顺月; 吴丁丁; 唐术燕; 赵金瑞; 吴正旺
Original assignee: Western Asia Electric Power Equipment Co ltd
Current assignee: Western Asia Electric Power Equipment Co ltd
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2021-02-12
Anticipated expiration: 2030-07-28

Abstract

The utility model relates to the technical field of fuses, and a high pressure drop out fuse is disclosed, which comprises an insulator, the static contact is installed to one side on insulator top, go up the top of static contact and install the connection terminal, go up one side of static contact and install the moving contact, the static contact is installed down to one side of insulator bottom, the undersetting is installed to the bottom of static contact down, the undersetting seat is installed to one side of undersetting bottom, the inside movable mounting who goes up the moving contact has the fuse tube. The utility model discloses a bimetallic strip circular telegram is heated the inflation, promotes the movable rod and removes, makes fixed orifices and fixed slot alternate segregation, and the dead lever receives the effect of spring plate to pop out from the inside of fixed pipe, through the spring plate to the impetus of dead lever, can be convenient for pop out the fuse tube, prevents that the fuse tube from receiving the influence of moving contact and can't pop out.

Description

High-voltage drop-out fuse

Technical Field

The utility model relates to a fuse technical field especially relates to a high-pressure drop out fuse.

Background

The drop-out fuse is composed of three parts of an insulating support, a moving contact, a static contact and a fuse tube. The static contact is installed at the both ends of insulating support, and the fuse tube comprises the extinction pipe of inlayer and outer phenolic aldehyde paper pipe or still oxygen glass fiber cloth pipe. The drop-out fuse is suitable for power systems with frequency of 50Hz and rated voltage of 35kV or below, and is arranged on the high-voltage side of a distribution transformer or a main power distribution circuit. The drop-out fuse can be used in combination with an isolating switch to replace an automatic air switch; the circuit breaker can be matched with a load switch for use, replaces a high-price circuit breaker, and has the functions of short-circuit protection, overload protection and circuit isolation.

When the existing high-voltage drop-out fuse is used, a large amount of current is introduced into a circuit for a short time, a fuse wire inside a fuse tube melts, the fuse tube drops downwards through self weight, so that the circuit can be disconnected, in the actual use process, because a large amount of current is introduced into the circuit in the twinkling of an eye, the upper moving contact melts, the fuse tube sometimes cannot be popped out under the influence of the self weight, so that the circuit cannot be disconnected, and the high-voltage drop-out fuse is provided for solving the problems.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is to solve the shortcoming that exists among the prior art, if: in the actual use process, because a large amount of current is introduced into the circuit instantly, the upper moving contact is melted, and the fuse tube sometimes cannot be popped out under the influence of the dead weight, so that the circuit cannot be disconnected, and the high-voltage drop-out fuse is provided.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the high-voltage drop-out fuse comprises an insulator, wherein an upper static contact is installed on one side of the top end of the insulator, an upper wire holder is installed on the top end of the upper static contact, an upper moving contact is installed on one side of the upper static contact, a lower static contact is installed on one side of the bottom end of the insulator, a lower support is installed on the bottom end of the lower static contact, a lower wire holder is installed on one side of the bottom end of the lower support, a fuse tube is movably installed in the upper moving contact, a fuse wire is installed in the fuse tube, a lower moving contact is installed at the bottom end of the fuse tube, the lower moving contact is movably inserted in the lower support, an arc extinguishing cover is installed at the top end of the upper moving contact, an installation plate is installed on one side of the middle part of the insulator, a limiting mechanism is installed on one side, the left side of the upper moving contact inner top wall is provided with a bimetallic strip, the left side of the upper moving contact inner bottom wall is provided with a locking mechanism, the top end of the fuse tube is provided with a fixed sleeve, the middle part of the left side of the fixed sleeve is provided with a fixed rod, the fixed rod is movably inserted into the locking mechanism, the left side of the upper moving contact inner cavity is provided with a spring plate, and one end of the fixed rod penetrating through the locking mechanism is contacted with the spring plate.

Preferably, the limiting mechanism comprises a limiting plate sleeved at the top of the fuse tube, the limiting plate is located above the limiting block, first springs are mounted at four corners of the top end of the limiting plate, and the top ends of the first springs are connected with the inner wall of the upper moving contact.

Preferably, the locking mechanism comprises a fixed pipe arranged on the inner wall of the upper moving contact, a movable rod is movably arranged at the top of the inner cavity of the fixed pipe, a fixed hole is formed in the middle of the movable rod, movable holes are formed in the tops of the two sides of the fixed pipe, the fixed rod is movably inserted into the movable holes, a fixed groove is formed in the bottom end of the fixed rod and one side of the fixed rod, which is located inside the fixed pipe, and the fixed groove and the fixed hole are mutually clamped.

Preferably, the bottom of movable rod and the internally mounted who is located fixed pipe have the movable block, the second spring is installed to the bottom of movable block.

Preferably, the top end of the fuse tube is provided with an arc extinguishing contact.

Preferably, the top of the right side of the fuse tube is provided with an operating ring.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses a bimetallic strip circular telegram is heated the inflation, promotes the movable rod and removes, makes fixed orifices and fixed slot alternate segregation, and the dead lever receives the effect of spring plate to pop out from the inside of fixed pipe, through the spring plate to the impetus of dead lever, can be convenient for pop out the fuse tube, prevents that the fuse tube from receiving the influence of moving contact and can't pop out.

(2) The utility model discloses a limiting plate and stopper's cooperation alternates at the fuse tube when last moving contact is inside, pushes the limiting plate through first spring and extrudes the stopper, makes the fuse tube remain stable in the inside of last moving contact, has avoided the high-pressure drop out fuse to appear the condition of dropping when installing.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged schematic view of the structure of FIG. 1;

fig. 3 is the schematic diagram of the internal structure of the upper moving contact of the present invention.

In the figure: 1. an insulator; 2. mounting a plate; 3. an upper static contact; 4. an upper wire holder; 5. an arc extinguishing chamber; 6. an upper moving contact; 7. a fuse tube; 8. a lower moving contact; 9. a lower support; 10. a lower wiring seat; 11. a lower static contact; 12. an operating ring; 13. a limiting block; 14. a limiting plate; 15. fixing a sleeve; 16. an arc extinguishing contact; 17. a first spring; 18. fixing the rod; 19. a bimetal; 20. a fixed tube; 21. a second spring; 22. a movable block; 23. fixing grooves; 24. a fixing hole; 25. a movable rod; 26. a movable hole; 27. a fuse; 28. a spring plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1-3, the high-voltage drop-out fuse includes an insulator 1, an upper static contact 3 is installed on one side of the top end of the insulator 1, an upper wire holder 4 is installed on the top end of the upper static contact 3, an upper moving contact 6 is installed on one side of the upper static contact 3, a lower static contact 11 is installed on one side of the bottom end of the insulator 1, a lower support 9 is installed on the bottom end of the lower static contact 11, a lower wire holder 10 is installed on one side of the bottom end of the lower support 9, a fuse tube 7 is movably installed in the upper moving contact 6, a fuse 27 is installed in the fuse tube 7, the fuse 27 is fused under the influence of a large current in a circuit, so that the pressure of the pulled moving contact of the fuse tube 7 can be reduced, an operating ring 12 is installed on the top of the right side of the fuse tube 7, the insulating rod penetrates and is pulled in the operating ring 12, the lower moving contact 8 is installed at the bottom end of the fuse tube 7, the lower moving contact 8 is movably inserted into the lower support 9, the arc extinguishing chamber 5 is installed at the top end of the upper moving contact 6, the arc extinguishing contact 16 is installed at the top end of the fuse tube 7, electric arcs are released into the arc extinguishing chamber 5 through the arc extinguishing contact 16, electric arcs appearing in the fuse tube 7 can be eliminated, a limiting block 13 is installed at the top of the fuse tube 7 and located in the upper moving contact 6, a mounting plate 2 is installed at one side of the middle part of the insulator 1, a limiting mechanism is installed at one side of the inner top wall of the upper moving contact 6, the limiting mechanism comprises a limiting plate 14 sleeved at the top of the fuse tube 7, the limiting plate 14 is located above the limiting block 13, first springs 17 are installed at four corners of the top end of the limiting plate 14, the top ends of the first springs 17 are connected with the inner wall, the limiting block 13 at the top of the fuse tube 7 is inserted below the limiting block 14, the limiting block 14 is pushed by the first spring 17 to contact the limiting block 14 with the limiting block 13, so that the fuse tube 7 can be simply fixed, the fuse tube 7 is kept stable in the upper moving contact 6, the bimetallic strip 19 is installed on the left side of the inner top wall of the upper moving contact 6, the locking mechanism is installed on the left side of the inner bottom wall of the upper moving contact 6 and comprises a fixed tube 20 installed on the inner wall of the upper moving contact 6, a movable rod 25 is movably installed at the top of the inner cavity of the fixed tube 20, a fixed hole 24 is formed in the middle of the movable rod 25, movable holes 26 are formed at the tops of two sides of the fixed tube 20, the fixed rod 18 is movably inserted in the movable holes 26, a fixed groove 23 is formed at the bottom end of the fixed rod 18 and at one side inside the fixed, the bottom end of the movable rod 25 is provided with a movable block 22 inside the fixed tube 20, the bottom end of the movable block 22 is provided with a second spring 21 which is inserted inside the movable hole 26 through the fixed rod 18, the second spring 21 pushes the movable rod 25 upwards to make the fixed hole 24 and the fixed groove 23 inserted into each other, so that the fixed rod 18 can keep stable inside the fixed tube 20, the movable rod 25 is pushed to move downwards through the thermal expansion of the bimetallic strip 19, the same fixed hole 24 and the fixed groove 23 are separated from each other, the fixed rod 18 is popped out from the movable hole 26 under the action of the spring plate 28, so that the upper moving contact 6 of the fuse tube 7 can be popped out of the upper moving contact 6, the influence of the upper moving contact 6 on the fuse tube 7 when the upper moving contact is deformed by heat is solved, the fixed sleeve 15 is arranged at the top end of the fuse tube 7, the fixed rod 18 is arranged in the, a spring plate 28 is arranged on the left side of the inner cavity of the upper movable contact 6, and one end of the fixing rod 18 penetrating through the locking mechanism is in contact with the spring plate 28.

In the utility model, when the user uses the device, the whole device is arranged on the bracket through the mounting plate 2, and the high-voltage drop-out fuse is connected into the circuit through the upper wire holder 4 and the lower wire holder 10, when the high-voltage drop-out fuse operates normally, the fuse tube 7 forms a closed position by means of the tensioning of the fuse wire 27, when the system breaks down, the fault current causes the fuse wire 27 to be rapidly fused and form an electric arc, the arc extinguishing contact 16 guides the electric arc into the inner part of the arc extinguishing cover 5, the electric arc can be extinguished, after the fuse wire 27 is fused, the lower static contact 11 loses tension and turns over downwards, the contracting mechanism releases the fuse tube 7, the fuse tube 7 falls to form an obvious breaking position, the upper moving contact 6 is affected by large current and is deformed, thereby the falling of the fuse tube 7 is prevented, the inner part of the upper moving contact 6 passes through a large amount of current, the bimetallic strip 19 is expanded by the high temperature, expanded bimetallic strip 19 can promote movable rod 25 downwards, movable rod 25 when the downstream, can make the fixed slot 23 of seting up on the dead lever 18 break away from the inside of fixed orifices 24, then dead lever 18 receives the impetus of spring plate 28 and wears out from the inside of fixed tube 20, can have the power of an outside promotion to fuse tube 7, after the circuit breaks down, make fuse tube 7 break away from moving contact 6 more conveniently, make whole circuit disconnection, can form the protection to the circuit.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Claims

1. The high-voltage drop-out fuse comprises an insulator (1) and is characterized in that an upper static contact (3) is installed on one side of the top end of the insulator (1), an upper wiring seat (4) is installed on the top end of the upper static contact (3), an upper moving contact (6) is installed on one side of the upper static contact (3), a lower static contact (11) is installed on one side of the bottom end of the insulator (1), a lower support (9) is installed at the bottom end of the lower static contact (11), a lower wiring seat (10) is installed on one side of the bottom end of the lower support (9), a fuse tube (7) is movably installed in the upper moving contact (6), a fuse wire (27) is installed in the fuse tube (7), a lower moving contact (8) is installed at the bottom end of the fuse tube (7), the lower moving contact (8) is movably inserted in the lower support (9), an arc extinguishing cover (5) is installed at the top end, mounting panel (2) are installed to one side at insulator (1) middle part, and stop gear is installed to one side of roof in going up moving contact (6), the internally mounted that the top of fuse tube (7) just was located moving contact (6) has stopper (13), bimetallic strip (19) are installed in the left side of roof in going up moving contact (6), locking mechanical system is installed in the left side of diapire in going up moving contact (6), fixed cover (15) are installed on the top of fuse tube (7), the left mid-mounting of fixed cover (15) has dead lever (18), dead lever (18) activity interlude is in locking mechanical system's inside, spring plate (28) are installed in the left side of going up moving contact (6) inner chamber, dead lever (18) pass locking mechanical system's one end and spring plate (28) contact.

2. The high-voltage drop-out fuse as claimed in claim 1, wherein the limiting mechanism comprises a limiting plate (14) sleeved on the top of the fuse tube (7), the limiting plate (14) is located above the limiting block (13), four corners of the top end of the limiting plate (14) are provided with first springs (17), and the top ends of the first springs (17) are connected with the inner wall of the upper movable contact (6).

3. The high-voltage drop-out fuse as claimed in claim 1, wherein the locking mechanism comprises a fixed tube (20) mounted on the inner wall of the upper movable contact (6), a movable rod (25) is movably mounted at the top of the inner cavity of the fixed tube (20), a fixed hole (24) is formed in the middle of the movable rod (25), movable holes (26) are formed in the tops of the two sides of the fixed tube (20), the fixed rod (18) is movably inserted into the movable holes (26), a fixed groove (23) is formed in the bottom end of the fixed rod (18) and located on one side of the inside of the fixed tube (20), and the fixed groove (23) and the fixed hole (24) are clamped with each other.

4. A high-voltage drop-out fuse as claimed in claim 3, characterised in that a movable block (22) is mounted at the bottom end of the movable rod (25) and inside the fixed tube (20), and a second spring (21) is mounted at the bottom end of the movable block (22).

5. A high-voltage drop-out fuse according to claim 1, characterised in that the fuse tube (7) is fitted at its top end with an arcing contact (16).

6. A high-voltage drop-out fuse as claimed in claim 1, characterised in that an operating ring (12) is mounted on the top right side of the fuse tube (7).