CN217306435U

CN217306435U - Fuse structure

Info

Publication number: CN217306435U
Application number: CN202220518830.3U
Authority: CN
Inventors: 伍斌; 邢亚东
Original assignee: Henan Hengrun Power Engineering Co ltd
Current assignee: Henan Hengrun Power Engineering Co ltd
Priority date: 2022-03-11
Filing date: 2022-03-11
Publication date: 2022-08-26
Anticipated expiration: 2032-03-11

Abstract

The utility model relates to a fuse structure, which is provided with a clamping device in a hook of a lower static contact, wherein the clamping device clamps a rotating shaft on a fusion tube in the process of installing the fusion tube, and the rotating shaft is prevented from dropping out of the hook in the process of closing a switch; the fusion tube falls to drive the clamping device to loosen, so that the fusion tube is convenient to take down. The installation and the disassembly of the fusion tube can not be influenced when the fusion tube is conveniently installed.

Description

Fuse structure

Technical Field

The utility model relates to power equipment technical field is a fuse structure particularly.

Background

The drop-out fuse is a short-circuit protection switch most commonly used for 10Kv distribution circuit branch lines and distribution transformers, can reduce the power failure range in a circuit, has the function of an isolating switch due to the fact that the drop-out fuse has an obvious disconnection point, and creates a safe operation environment for maintenance section lines and equipment.

The fuse tube comprises an insulating part and a fuse tube arranged on the insulating part, wherein a fuse wire is arranged in the fuse tube, when short-circuit current is fused through the fuse wire, electric arc is generated, a steel paper tube lined in the fuse tube generates a large amount of gas left and right under the electric arc, and the gas is sprayed out towards the lower end to blow out the electric arc due to the fact that the upper end of the fuse tube is sealed. As the fuse wire is fused, the upper and lower moving contacts of the fuse tube lose the fastening force of the fuse wire, and the fuse tube falls under the action of the self gravity of the fuse tube and the spring pieces of the upper and lower static contacts, so that the circuit is disconnected.

In the process of installing the fusion tube, the rotating shaft on the fusion tube needs to be clamped into the hook at the bottom, and then the insulating rod is adopted to operate the operating ring at the upper part of the fusion tube to perform switching-on operation on the contact at the top of the fusion tube. In the process of closing, the rotating shaft is easy to loosen in the hook, and closing operation is affected.

Disclosure of Invention

The utility model relates to a fuse structure, which is provided with a clamping device in a hook of a lower static contact, wherein the clamping device clamps a rotating shaft on a fusion tube in the installation process of the fusion tube, so that the rotating shaft is prevented from being separated from the hook in the switching-on process; the fusion tube falls to drive the clamping device to loosen, so that the fusion tube is convenient to take down. The installation and the disassembly of the fusion tube can not be influenced when the fusion tube is conveniently installed.

The utility model discloses realize above-mentioned purpose and adopt following technical scheme:

a fuse structure comprises an insulator, an upper fixed contact and a lower fixed contact which are arranged on the insulator, a fusion tube, and an upper moving contact and a lower moving contact which are arranged on the fusion tube.

The upper static contact and the lower static contact are respectively arranged on the top and the bottom side of the insulator, and the upper static contact and the lower static contact are respectively provided with a wiring terminal; the side surface of the insulator is provided with a mounting rack; the lower moving contact is provided with a rotating shaft, the lower static contact is provided with a hook corresponding to the rotating shaft, the bottom of the fusion tube is arranged in the hook through the rotating shaft, and the top of the fusion tube is connected to the upper static contact through the upper moving contact; and a clamping device for clamping the rotating shaft is arranged in the lower static contact.

The side surface of the lower static contact is provided with a groove, and the clamping device is arranged in the groove; and the top of the groove is provided with an end cover corresponding to the groove.

The clamping device comprises two clamping plates, hinge shafts are respectively arranged in grooves on two sides of the rotating shaft, the two clamping plates are symmetrical to each other, and the two clamping plates are respectively hinged to the two hinge shafts; the inboard bulge that all is equipped with the countershaft and fixes of cardboard top.

The clamping device also comprises a lifting sliding plate, and the top of the lifting sliding plate penetrates through the bottom of the hook and is supported to the rotating shaft; the bottom of the lifting sliding plate extends downwards to the outside of the lower static contact, and the front end of the bottom of the lifting sliding plate is provided with an arc-shaped groove; a sliding column is arranged on the lower movable contact corresponding to the groove; the lifting slide plate drives the clamping plate.

The two sides of the lifting sliding plate are provided with symmetrical sliding chutes which are obliquely arranged, and the symmetrical sliding chutes are of inverted splayed structures; a limiting column corresponding to the sliding groove is arranged below the front part of the clamping plate, and the lifting sliding plate is lifted to drive the limiting column to slide in the sliding groove to realize the opening and closing of the clamping plate; a concave part is arranged at the position of the top of the lifting sliding plate corresponding to the rotating shaft; when the protruding part on the cardboard supported the pivot top, the top of spacing post corresponding spout.

The lifting slide plate is also provided with a positioning device for fixing the position of the lifting slide plate.

The positioning device comprises a strip-shaped hole arranged at the center of the lifting sliding plate, and the strip-shaped hole is vertically arranged; a limiting reed is arranged in the strip-shaped hole, the limiting reed comprises C-shaped rings at the top and the bottom and an arc support plate arranged between the two C-shaped rings, the C-shaped rings are arranged oppositely, two arc support plates which are mutually connected are arranged between the two C-shaped rings, and the arc support plates jointly protrude to the center; a fixing column is arranged on the end cover corresponding to the strip-shaped hole and matched with a limiting reed in the strip-shaped hole; when the lifting slide plate is at the highest point and the lowest point, the fixed column slides into the C-shaped rings at the top and the bottom respectively.

The utility model adopts the above technical scheme following beneficial effect has:

the device is simple in integral structure, when the fusion tube is hung in the hook through the rotating shaft, the clamping plate limits the top of the rotating shaft, and then the clamping plate can prevent the rotating shaft from slipping from the hook in the process of installing the upper moving contact at the top; in the process that the fusion tube falls, the traveller on the fusion tube drives the lifting slide plate to rise, and the cardboard is opened to the in-process that rises, and the follow-up staff of being convenient for takes off the fusion tube and carries out the change of fuse.

Drawings

Fig. 1 is a schematic view of the present invention.

Fig. 2 is a schematic view of a clamping device.

Fig. 3 is a schematic view of a spacing reed.

Fig. 4 is a schematic view of an end cap.

Detailed Description

As shown in fig. 1-4, the fuse structure includes an insulator 1, an upper fixed contact 101 and a lower fixed contact 102 disposed on the insulator 1, a fuse tube 2, and an upper movable contact 201 and a lower movable contact 202 disposed on the fuse tube 2.

The upper static contact 101 and the lower static contact 102 are respectively arranged on the side surfaces of the top and the bottom of the insulator 1, and the wiring terminals 3 are respectively arranged on the upper static contact 101 and the lower static contact 102; the side surface of the insulator 1 is provided with a mounting rack 103; a rotating shaft 203 is arranged on the lower moving contact 202, a hook 104 corresponding to the rotating shaft 203 is arranged on the lower fixed contact 102, the bottom of the fusion tube 2 is arranged in the hook 104 through the rotating shaft 203, and the top of the fusion tube 2 is connected to the upper fixed contact 101 through the upper moving contact 201; a clamping device 4 for clamping the rotating shaft 203 is arranged in the lower fixed contact 102.

A groove 105 is formed in the side surface of the lower fixed contact 102, and the clamping device 4 is arranged in the groove 105; the top of the groove 105 is provided with an end cover 106 corresponding to the groove 105.

The clamping device 4 comprises two clamping plates 401, hinge shafts 402 are respectively arranged in the grooves 105 on the two sides of the rotating shaft 203, the two clamping plates 401 are symmetrical to each other, and the two clamping plates 401 are respectively hinged on the two hinge shafts 402; the card 401 has a protrusion 403 on the top thereof for fixing the rotating shaft 203.

The clamping device 4 further comprises a lifting sliding plate 404, and the top of the lifting sliding plate 404 is supported to the rotating shaft 203 through the bottom of the hook; the bottom of the lifting sliding plate 404 extends downwards to the outside of the lower static contact, and the front end of the bottom of the lifting sliding plate 404 is provided with an arc-shaped groove 405; a sliding column 204 is arranged on the lower moving contact 202 corresponding to the groove 405; the lifting slide plate 404 drives the chuck plate 401.

The two sides of the lifting sliding plate 404 are provided with symmetrical chutes 406, the chutes 406 are obliquely arranged, and the symmetrical chutes 406 are in an inverted splayed structure; a limiting column 407 corresponding to the sliding chute 406 is arranged below the front part of the clamping plate 401, and the lifting sliding plate 404 is lifted to drive the limiting column 407 to slide in the sliding chute 406 to realize the opening and closing of the clamping plate 401; the top of the lifting sliding plate 404 is provided with a concave part 408 corresponding to the position of the rotating shaft 203; when the protrusion 403 of the card board 401 is supported to the top of the rotating shaft 203, the limiting column 407 corresponds to the top of the sliding slot 406.

The lifting slide plate 404 is further provided with a positioning device 409 for fixing the position thereof.

The positioning device 409 comprises a strip-shaped hole 4091 arranged at the center of the lifting sliding plate 404, and the strip-shaped hole 4091 is vertically arranged; a limiting reed 4092 is arranged in the strip-shaped hole 4091, the limiting reed 4092 comprises C-shaped rings 4093 at the top and the bottom and an arc-shaped support plate 4094 arranged between the two C-shaped rings 4093, the C-shaped rings 4093 are arranged oppositely, two arc-shaped support plates 4094 which are mutually connected are arranged between the two C-shaped rings 4093, and the arc-shaped support plates 4094 jointly protrude to the center; a fixing column 4095 is arranged on the end cover 106 corresponding to the strip-shaped hole 4091, and the fixing column 4095 is matched with a limit reed 4092 in the strip-shaped hole 4091; when the lifting slide plate 404 is at the highest point and the lowest point, the fixing column 4095 slides into the C-shaped rings 4093 at the top and the bottom, respectively.

During use, the fusion tube is hung in the hook through the rotating shaft, then the fusion tube and the rotating shaft are pressed downwards, the rotating shaft drives the lifting sliding plate to slide downwards, the sliding groove drives the limiting column of the limiting column to move, and the protruding part at the top of the clamping plate is retracted inwards and supported to the top of the rotating shaft to realize limiting; and in the process of downward movement of the lifting sliding plate. And the limiting spring in the strip-shaped hole moves downwards and enables the C-shaped ring at the top to be fixed corresponding to the fixing column on the end cover, and then the fusion tube can be installed.

When a fuse wire in the fuse tube is fused, the fuse tube falls, a sliding column on the lower moving contact supports a groove at the bottom of the lifting sliding plate to drive the lifting sliding plate to move upwards, a sliding groove on the lifting sliding plate drives the clamping plate to be opened in the moving-up process, so that the protrusion part at the top of the clamping plate loosens the limitation on the rotating shaft, and meanwhile, the lifting sliding plate supports the rotating shaft to rise; in the lifting process, the limiting spring leaf on the lifting sliding plate moves upwards, so that the C-shaped ring at the bottom slides into the fixing column to realize positioning.

Claims

1. The utility model provides a fuse structure, it includes the insulator, establish last static contact and lower static contact on the insulator, fusion tube and establish last moving contact and lower moving contact on the fusion tube, its characterized in that: the upper static contact and the lower static contact are respectively arranged on the top and the bottom side of the insulator, and the upper static contact and the lower static contact are respectively provided with a wiring terminal; the side surface of the insulator is provided with a mounting frame; the lower moving contact is provided with a rotating shaft, the lower static contact is provided with a hook corresponding to the rotating shaft, the bottom of the fusion tube is arranged in the hook through the rotating shaft, and the top of the fusion tube is connected to the upper static contact through the upper moving contact; and a clamping device for clamping the rotating shaft is arranged in the lower static contact.

2. A fuse structure in accordance with claim 1, wherein: the side surface of the lower static contact is provided with a groove, and the clamping device is arranged in the groove; and the top of the groove is provided with an end cover corresponding to the groove.

3. A fuse structure in accordance with claim 2, wherein: the clamping device comprises two clamping plates, hinge shafts are respectively arranged in grooves on two sides of the rotating shaft, the two clamping plates are symmetrical to each other, and the two clamping plates are respectively hinged to the two hinge shafts; the inboard bulge that all is equipped with the countershaft and fixes of cardboard top.

4. A fuse structure in accordance with claim 3, wherein: the clamping device also comprises a lifting sliding plate, and the top of the lifting sliding plate penetrates through the bottom of the hook and is supported to the rotating shaft; the bottom of the lifting sliding plate extends downwards to the outside of the lower static contact, and the front end of the bottom of the lifting sliding plate is provided with an arc-shaped groove; a sliding column is arranged on the lower movable contact corresponding to the groove; the lifting slide plate drives the clamping plate.

5. A fuse structure in accordance with claim 4, wherein: the two sides of the lifting sliding plate are provided with symmetrical sliding chutes which are obliquely arranged, and the symmetrical sliding chutes are of inverted splayed structures; a limiting column corresponding to the sliding groove is arranged below the front part of the clamping plate, and the lifting sliding plate is lifted to drive the limiting column to slide in the sliding groove to realize the opening and closing of the clamping plate; a concave part is arranged at the position of the top of the lifting sliding plate corresponding to the rotating shaft; when the protruding part on the cardboard supported the pivot top, the top of spacing post corresponding spout.

6. A fuse structure in accordance with claim 5, wherein: the lifting slide plate is also provided with a positioning device for fixing the position of the lifting slide plate.

7. A fuse structure in accordance with claim 6, wherein: the positioning device comprises a strip-shaped hole arranged at the center of the lifting sliding plate, and the strip-shaped hole is vertically arranged; a limiting reed is arranged in the strip-shaped hole, the limiting reed comprises C-shaped rings at the top and the bottom and an arc support plate arranged between the two C-shaped rings, the C-shaped rings are arranged oppositely, two arc support plates which are mutually connected are arranged between the two C-shaped rings, and the arc support plates jointly protrude to the center; a fixing column is arranged on the end cover corresponding to the strip-shaped hole and matched with a limiting reed in the strip-shaped hole; when the lifting slide plate is at the highest point and the lowest point, the fixed column slides into the C-shaped rings at the top and the bottom respectively.