CN216624189U

CN216624189U - Drop-out fuse with reminding unit

Info

Publication number: CN216624189U
Application number: CN202220083346.2U
Authority: CN
Inventors: 林林; 陈庆国; 王新宇; 程嵩
Original assignee: Harbin University of Science and Technology
Current assignee: Harbin University of Science and Technology
Priority date: 2022-01-13
Filing date: 2022-01-13
Publication date: 2022-05-27
Anticipated expiration: 2032-01-13

Abstract

The utility model discloses a drop-out fuse with a reminding unit, belongs to the technical field of high-voltage protection of a power grid, and aims to solve the problem that a drop-out fuse with a fault on an existing high-voltage distribution line is not easy to find due to position limitation. The utility model comprises a ceramic insulator, an upper fixed contact, a lower fixed contact, an upper wiring terminal, a lower wiring terminal and a fuse tube, and is characterized by also comprising a reminding unit, wherein the free end of the lower fixed contact is connected with the reminding unit through a connecting rod; the reminding unit comprises a cylinder, a spring, a partition plate, a movable pressing plate, a central long rod and a diamond-like section glass ball, the upper end and the lower end of the cylinder are both provided with openings, the upper end of the cylinder is provided with a pair of opposite notches, a falling fusing tube is pressed to the upper surface of the movable pressing plate from the pair of notches during failure, the movable pressing plate moves downwards along with the compressed spring, and the central long rod drives the diamond-like section glass ball to move downwards and extend out of a lower port of the cylinder. The method is used for reminding the position of the fault point of the drop-out fuse.

Description

Drop-out fuse with reminding unit

Technical Field

The utility model relates to a protection device drop-out fuse fault reminding device of a distribution transformer, and belongs to the technical field of high-voltage protection of a power grid.

Background

The drop-out fuse is a short-circuit protection switch most commonly used for 10kV distribution line branch lines and distribution transformers.

The drop-out fuse is installed on a 10kV distribution line branch line, the power failure range can be shortened, and the drop-out fuse has an obvious disconnection point, has the function of an isolating switch and creates a safe operation environment for maintenance section lines and equipment.

The protective device is arranged on a distribution transformer and can be used as the main protection of the distribution transformer.

The moving contacts at the two ends of the fuse tube are tied tightly by means of a fuse wire (melt), after the upper moving contact is pushed into the convex part of the 'duckbill', the upper fixed contact made of phosphor copper sheets and the like props against the upper moving contact, and therefore the fuse tube is firmly clamped in the 'duckbill'. When the short-circuit current is fused through the fuse wire, an electric arc is generated, a steel paper tube lined in the fuse tube generates a large amount of gas under the action of the electric arc, the gas is sealed due to the upper end of the fuse tube, and the gas is sprayed out to the lower end to blow out the electric arc. 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 rapidly under the action of the gravity of the fuse tube and the spring pieces of the upper and lower static contacts, so that a circuit is disconnected, and a fault section line or fault equipment is cut off.

Because drop out fuse sets up on high-voltage distribution lines, its mounted position is higher, and patrol the staff and be difficult for sending it and whether fall, the drop out fuse that breaks down promptly is difficult for discovering because the position is limited.

Therefore, aiming at the defects, a reminding device is required to be arranged on the fuse, so that patrol workers can easily find out fault points, and the maintenance is convenient.

SUMMERY OF THE UTILITY MODEL

The utility model provides a drop-out fuse with a reminding unit, aiming at the problem that the drop-out fuse with a fault on the existing high-voltage distribution line is not easy to find due to position limitation.

The drop-out fuse with the reminding unit comprises a ceramic insulator 1, an upper static contact 2, a lower static contact 3, an upper wiring terminal 4, a lower wiring terminal 5 and a fuse tube 7, wherein the upper and lower ends of the ceramic insulator 1 are respectively provided with the upper static contact 2 and the lower static contact 3, the upper wiring terminal 4 and the lower wiring terminal 5 are respectively arranged on the upper static contact 2 and the lower static contact 3 and respectively provide connection points with a main line lead and a ground wire; the upper static contact 2 is duckbilled and is used for clamping an upper moving contact of the fuse tube 7; the lower static contact 3 is rotationally connected with a lower moving contact of the fuse tube 7;

it is characterized by also comprising a reminding unit 8,

the suspended end of the lower static contact 3 is connected with the reminding unit 8 through a connecting rod 10;

the reminding unit 8 comprises a cylinder 800, a spring 802, a partition plate 803, a movable pressing plate 804, a central long rod 805 and a glass ball 806 with a diamond-like section, wherein the upper end and the lower end of the cylinder 800 are both provided with openings, the upper end of the cylinder 800 is provided with a pair of opposite notches 801, the partition plate 803 is fixedly arranged in the cylinder 800 and divides the interior into an upper cavity and a lower cavity, the partition plate 803 is provided with a central through hole, the spring 802 is arranged in the upper cavity of the cylinder 800, the lower end of the spring 802 is fixed on the partition plate 803, the upper end of the spring 802 is provided with the movable pressing plate 804, and the movable pressing plate 804 is matched with the inner diameter of the cylinder 800; the lower surface of the movable pressing plate 804 is connected with the top end of a long central rod 805, the bottom end of the long central rod 805 sequentially passes through the hollow part of the spring 802 and a central through hole of the partition plate 803 and is connected with a glass ball 806 with a diamond-like section in the lower cavity;

in case of failure, the dropped fuse tube 7 is pressed from the pair of notches 801 to the upper surface of the movable pressing plate 804, the movable pressing plate 804 moves downwards along with the compressed spring 802, and the central long rod 805 drives the glass ball 806 with the diamond-like section to move downwards and extend out of the lower port of the cylinder 800.

Preferably, a pull ring 6 is further included, the pull ring 6 being disposed at an upper end of the fuse tube 7.

Preferably, still include fixed mounting 9, fixed mounting 9 sets up on ceramic insulator 1, and the installation is fixed on 10kV pole tower.

The utility model has the beneficial effects that: the utility model is provided with a reminding unit on the drop-out fuse, the reminding unit is not started when the fuse is normal, when a fault occurs, the fusing tube falls onto the movable pressing plate of the cylinder, the spring in the cylinder is compressed by the self gravity and downward inertia, the movable pressing plate at the top end of the spring moves downwards along with the fusing tube, and the central long rod drives the glass ball at the rod end to extend out from the lower end of the cylinder.

Drawings

Fig. 1 is a schematic structural diagram of a drop-out fuse with a reminder unit according to the present invention;

FIG. 2 is a schematic perspective view of a cylinder of the reminder unit;

FIG. 3 is a schematic structural view of the fuse when it is not dropped;

fig. 4 is a schematic diagram of the structure when the fuse is dropped.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The utility model is further described with reference to the following drawings and specific examples, which are not intended to be limiting.

The first embodiment is as follows: the drop-out fuse with the reminding unit according to the present embodiment is described below with reference to fig. 1 to 4, and includes a ceramic insulator 1, an upper static contact 2, a lower static contact 3, an upper wiring terminal 4, a lower wiring terminal 5, and a fuse tube 7, where the upper and lower ends of the ceramic insulator 1 are respectively provided with the upper static contact 2 and the lower static contact 3, and the upper wiring terminal 4 and the lower wiring terminal 5 are respectively provided with the upper static contact 2 and the lower static contact 3, and respectively provide connection points with a main line lead and a ground wire; the upper static contact 2 is duckbilled and is used for clamping an upper moving contact of the fuse tube 7; the lower static contact 3 is rotationally connected with a lower moving contact of the fuse tube 7;

a reminder unit 8 is also included which,

in case of failure, the dropped fuse tube 7 is pressed from the pair of notches 801 to the upper surface of the movable pressing plate 804, the movable pressing plate 804 moves downwards along with the compressed spring 802, and the central long rod 805 drives the glass ball 806 with the diamond-like section to move downwards and extend out of the lower port of the cylinder 800. The external diameter of activity clamp plate 804 and drum 800's internal diameter phase-match, can use drum 800 internal diameter as the limit when activity clamp plate 804 reciprocates, the phenomenon of slope can not take place, the fixed central stock in activity clamp plate 804 below inserts from the space in the middle of spring 802, pass from the central through-hole of division board 803 again, the lower extreme fixedly connected with imitation diamond tangent plane glass ball 806 of central stock 802, there are numerous tangent planes on imitation diamond tangent plane glass ball 806 surface, there is strong reflection to sunlight or light, the refraction effect, look far away and just can discover that it dodges and give out light, reach the purpose of reminding the fault point. The gap above the cylinder is about half of the circumference, and the remaining half of the circumference except the gap is still higher than the movable pressing plate 804 when no fault exists, so as to ensure that the movable pressing plate 804 cannot jump out of the cylinder after the spring 802 rebounds after the fault protective tube 807 is removed.

Further, the fuse protector further comprises a pull ring 6, wherein the pull ring 6 is arranged at the upper end of the fuse tube 7. The operation of maintenance personnel is convenient.

Further, still include fixed mounting portion 9, fixed mounting portion 9 sets up on ceramic insulator 1, and the installation is fixed on 10kV pole tower.

The upper static contact 2 is a copper material part, is integrally connected with the upper wiring terminal 4, and provides a connecting contact for an upper moving contact of the fuse tube 7.

The lower static contact 3 is a copper material part, is integrally connected with the lower wiring terminal 5, and provides a connecting contact for a lower moving contact of the fuse tube 7.

The ceramic insulator 1 is a ceramic material part, is connected with the upper static contact 2, the lower static contact 3, the upper wiring terminal 4, the lower wiring terminal 5 and the mounting part 9, and plays an insulating role among all the parts.

The upper moving contact of the fuse tube 7 is a copper material, and acts after the fuse is fused, so as to be separated from the upper static contact 2.

The lower moving contact of the fuse tube 7 is made of a copper material, is arranged on the lower static contact 3 and is in rotating connection.

When the fuse fails, the glass ball 806 with the diamond-like section is located in the lower cavity of the cylinder 800, and the sunlight or light cannot shine, so that the light cannot be reflected or refracted, namely, the light cannot emit light. When a fault occurs, the moving contact on the fusing tube 7 acts and falls off from the upper static contact 2, the middle section of the fusing tube 7 is pressed to the upper surface of the movable pressing plate 804 from the positions of the pair of notches 801, the spring 802 contracts under the action of gravity and downward inertia of the fusing tube 7, the movable pressing plate 804 moves downwards along with the compressed spring 802, the movable pressing plate 804 drives the central long rod 805 to move downwards, the central long rod 805 drives the diamond-like section glass ball 806 to move downwards and extend out from the lower port of the cylinder 800, the diamond-like section glass ball 806 can reflect and refract light in multiple directions under the irradiation of sunlight or light, and the flashing and illuminating effect can achieve a remarkable reminding effect, so that patrol workers can quickly find a fault point and maintain the fault.

Although the utility model herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.

Claims

1. The drop-out fuse with the reminding unit comprises a ceramic insulator (1), an upper static contact (2), a lower static contact (3), an upper wiring terminal (4), a lower wiring terminal (5) and a fuse tube (7), wherein the upper and lower ends of the ceramic insulator (1) are respectively provided with the upper static contact (2) and the lower static contact (3), and the upper wiring terminal (4) and the lower wiring terminal (5) are respectively arranged on the upper static contact (2) and the lower static contact (3) and respectively provide connection points with a main line lead and a ground wire; the upper static contact (2) is duckbilled and is used for clamping an upper moving contact of the fuse tube (7); the lower static contact (3) is rotationally connected with a lower moving contact of the fuse tube (7);

it is characterized by also comprising a reminding unit (8),

the suspension end of the lower static contact (3) is connected with the reminding unit (8) through a connecting rod (10);

the reminding unit (8) comprises a cylinder (800), springs (802), partition plates (803), movable press plates (804), a long central rod (805) and glass balls (806) with diamond-like tangent planes, wherein the upper end and the lower end of the cylinder (800) are both provided with openings, the upper end of the cylinder (800) is provided with a pair of opposite notches (801), the partition plates (803) are fixedly arranged in the cylinder (800) and divide the interior into an upper cavity and a lower cavity, the partition plates (803) are provided with central through holes, the springs (802) are arranged in the upper cavity of the cylinder (800), the lower ends of the springs (802) are fixed on the partition plates (803), the upper ends of the springs (802) are provided with the movable press plates (804), and the movable press plates (804) are matched with the inner diameter of the cylinder (800); the lower surface of the movable pressing plate (804) is connected with the top end of a long central rod (805), the bottom end of the long central rod (805) sequentially penetrates through a hollow part of the spring (802) and a central through hole of the partition plate (803) and is connected with a glass ball (806) with a diamond-like section in a lower cavity;

when the fuse tube breaks down, the falling fuse tube (7) is pressed to the upper surface of the movable pressing plate (804) from the pair of notches (801), the movable pressing plate (804) moves downwards along with the compressed spring (802), and the long central rod (805) drives the glass ball (806) with the diamond-like section to move downwards and extend out of the lower port of the cylinder (800).

2. A drop-out fuse with a reminder unit according to claim 1, characterized in that it further comprises a pull ring (6), the pull ring (6) being arranged at the upper end of the fuse tube (7).

3. The drop-out fuse with the reminding unit as claimed in claim 1, further comprising a fixing installation part (9), wherein the fixing installation part (9) is arranged on the ceramic insulator (1) and is fixedly installed on the 10kV pole tower.