CN217307261U

CN217307261U - Secondary overvoltage protector of current transformer

Info

Publication number: CN217307261U
Application number: CN202220421728.1U
Authority: CN
Inventors: 赵天龙; 方冠亚; 张高伟; 黄伟锋; 张会娟
Original assignee: Xuchang Guoyuan Electric Co ltd
Current assignee: Xuchang Guoyuan Electric Co ltd
Priority date: 2022-03-01
Filing date: 2022-03-01
Publication date: 2022-08-26
Anticipated expiration: 2032-03-01

Abstract

The utility model discloses a current transformer secondary overvoltage protector, including the installation box with be located its inside protector body, the front of installation box articulates there is the lid door, set up flutedly in the installation box, the top of recess is equipped with the quick detach structure, the recess has the connecting plate through quick detach structure fixed mounting, the front and the protector body fixed connection of connecting plate, the interior roof of installation box is equipped with trigger mechanism, a plurality of air vents have been seted up to the interior diapire of installation box, the bottom of installation box is equipped with the connection shell, be equipped with the cooling mechanism who is used for the accuse temperature in the connection shell. The utility model discloses a setting of trigger mechanism and cooling mechanism, when the internal temperature of installing box rises, the shape retrieval of memory metal is for predetermineeing the state, and when the shape retrieval of memory metal is for predetermineeing the state, can press trigger switch and start cooling mechanism, cooling mechanism can begin to cool down to the installation box internal like this to the effectual high resistance value grow that causes of heat of avoiding.

Description

Secondary overvoltage protector of current transformer

Technical Field

The utility model relates to a voltage protector technical field specifically is a current transformer secondary overvoltage protection device.

Background

The Current Transformer (CT) is widely applied to an electric power system, and is an indispensable matching element of an ammeter, a watt-hour meter and a current control system. When the current transformer normally works, the secondary overvoltage of the current transformer is approximate to a short-circuit state, and the output voltage is very low. In the case of actual operation, if the secondary winding is open, or an abnormal current flows through the primary winding, such as lightning current, resonance overcurrent, capacitor charging current, inductor starting current and the like, can generate overvoltage of thousands of volts or even tens of thousands of volts on the secondary side, can cause the current transformer to be burnt out due to over excitation, and even endangers the life safety of workers, the conventional secondary overvoltage protector of the current transformer, the heat productivity of the power module inside the power module is large, the resistance value is increased due to the continuous large heat productivity in the working process, so that the temperature rise change rate of the power module is increased rapidly, and then influenced current transformer secondary overvoltage protector's normal work, simultaneously, current transformer secondary overvoltage protector dismantles the mode comparatively complicated, and inconvenient user of service maintains, consequently, we provide a current transformer secondary overvoltage protector.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a current transformer secondary overvoltage protector is in order to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a current transformer secondary overvoltage protector, is including installation box and the inside protector body that is located it, the front of installation box articulates there is the lid door, set up flutedly in the installation box, the top of recess is equipped with the rapid disassembly structure, the recess has the connecting plate through rapid disassembly structure fixed mounting, the front and the protector body fixed connection of connecting plate, the interior roof of installation box is equipped with trigger mechanism, a plurality of air vents have been seted up to the interior diapire of installation box, the bottom of installation box is equipped with the connection shell, be equipped with the cooling mechanism who is used for the accuse temperature in the connection shell.

Preferably, the rapid disassembly structure includes slider, direction spout, connecting rod, plug and reset spring, the inner wall of installation box is seted up to the direction spout, sliding connection has the slider in the direction spout, the equal fixedly connected with connecting rod in both sides of slider, the bottom fixedly connected with plug of connecting rod, the slot with plug looks adaptation is seted up to the both sides at connecting plate top, the top of connecting rod is equipped with reset spring.

Preferably, the trigger mechanism includes trigger switch, limiting plate, memory metal and trigger plate, one side fixed connection limiting plate of trigger switch, be equipped with memory metal between limiting plate and the trigger switch, memory metal's bottom is equipped with the trigger plate.

Preferably, cooling mechanism includes liquid reserve tank, drain pipe, liquid return pipe, honeycomb duct, the pump body and cooling fan, the both sides difference fixedly connected with drain pipe and the liquid return pipe at liquid reserve tank top, be equipped with the pump body on the liquid return pipe, fixedly connected with honeycomb duct between drain pipe and the liquid return pipe.

Preferably, the mounting openings are formed in two sides of the mounting box body, magnets are arranged in the mounting openings, the mounting openings are fixedly provided with dust guard plates through the magnets, and a plurality of ventilation openings are formed in the dust guard plates.

Preferably, the bottom of the guide sliding groove is provided with two limiting beads, and two sides of the bottom of the connecting plate are provided with groove bodies matched with the limiting beads.

Preferably, one side of liquid reserve tank is equipped with the liquid feeding pipe, liquid feeding pipe through connection shell, just one end threaded connection of liquid feeding pipe through connection shell has the lid.

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

1. the utility model discloses a setting of trigger mechanism and cooling mechanism, when the internal temperature rise of installing box, memory metal's shape retrieval is for predetermineeing the state, and when memory metal's shape retrieval was for predetermineeing the state, can press trigger switch and start cooling mechanism, cooling mechanism can begin to cool down to the installation box internal like this to the effectual high resistance value grow that causes of heat of avoiding.

2. The utility model discloses a setting of rapid disassembly structure and connecting plate, when needs are installed or are dismantled the protector body, personnel's accessible rapid disassembly structure is dismantled or is installed connecting plate and protector body fast, can effectually save the time of installing and dismantling like this, promotes the efficiency of maintaining or maintaining.

Drawings

FIG. 1 is a schematic view of the overall three-dimensional structure of the present invention;

FIG. 2 is a schematic overall front view of the present invention;

FIG. 3 is a schematic structural view of the quick release structure of the present invention;

FIG. 4 is a schematic structural view of the cooling mechanism of the present invention;

fig. 5 is an enlarged schematic view of a portion a in fig. 2 according to the present invention.

In the figure: 1. installing a box body; 2. a protector body; 3. covering the door; 4. a groove; 5. a quick release structure; 501. a slider; 502. a guide chute; 503. a connecting rod; 504. a plug; 505. a return spring; 6. a connecting plate; 7. a trigger mechanism; 701. a trigger switch; 702. a limiting plate; 703. a memory metal; 704. a trigger plate; 8. a connecting housing; 9. a cooling mechanism; 901. a liquid storage tank; 902. a liquid outlet pipe; 903. a liquid return pipe; 904. a flow guide pipe; 905. a pump body; 906. a cooling fan; 10. a dust guard.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the 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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides an embodiment: a secondary overvoltage protector of a current transformer comprises an installation box body 1 and a protector body 2 positioned in the installation box body, the front surface of the installation box body 1 is hinged with a cover door 3, installation openings are formed in two sides of the installation box body 1, magnets are arranged in the installation openings, a dustproof plate 10 is fixedly installed on the installation openings through the magnets, a plurality of ventilation openings are formed in the dustproof plate 10, a groove 4 is formed in the installation box body 1, a quick-release structure 5 is arranged at the top of the groove 4, the quick-release structure 5 comprises a sliding block 501, a guide sliding groove 502, a connecting rod 503, a plug 504 and a reset spring 505, the guide sliding groove 502 is formed in the inner wall of the installation box body 1, two limiting beads are arranged at the bottom of the guide sliding groove 502, groove bodies matched with the limiting beads are formed in two sides of the bottom of a connecting plate 6, the sliding block 501 is connected in the guide sliding groove 502, the connecting rod 503 is fixedly connected to two sides of the sliding block 501, and the plug 504 is fixedly connected to the bottom of the connecting rod 503, the two sides of the top of the connecting plate 6 are provided with slots matched with the plug 504, the top of the connecting rod 503 is provided with a return spring 505, the groove 4 is fixedly provided with the connecting plate 6 through the quick-release structure 5, through the arrangement of the quick-release structure 5 and the connecting plate 6, when the protector body 2 needs to be installed or disassembled, personnel can quickly disassemble or install the connecting plate 6 and the protector body 2 through the quick-release structure 5, thus effectively saving the time for installation and disassembly and improving the efficiency of maintenance or repair, the front surface of the connecting plate 6 is fixedly connected with the protector body 2, the inner top wall of the installation box body 1 is provided with a trigger mechanism 7, the trigger mechanism 7 comprises a trigger switch 701, a limiting plate 702, a memory metal 703 and a trigger plate 704, one side of the trigger switch 701 is fixedly connected with the limiting plate 702, the memory metal 703 is arranged between the limiting plate 702 and the trigger switch 701, and the bottom of the memory metal 703 is provided with the trigger plate 704, the inner bottom wall of the installation box body 1 is provided with a plurality of vent holes, the bottom of the installation box body 1 is provided with a connecting shell 8, a cooling mechanism 9 for controlling temperature is arranged in the connecting shell 8, the cooling mechanism 9 comprises a liquid storage box 901, a liquid outlet pipe 902, a liquid return pipe 903, a guide pipe 904, a pump body 905 and a cooling fan 906, the two sides of the top of the liquid storage box 901 are fixedly connected with the liquid outlet pipe 902 and the liquid return pipe 903 respectively, one side of the liquid storage box 901 is provided with a liquid adding pipe which penetrates through the connecting shell 8, one end of the liquid adding pipe which penetrates through the connecting shell 8 is connected with a cover body in a threaded manner, the liquid return pipe 903 is provided with the pump body 905, the guide pipe 904 is fixedly connected between the liquid outlet pipe 902 and the liquid return pipe 903, through the arrangement of the trigger mechanism 7 and the cooling mechanism 9, when the temperature in the installation box body 1 rises, the shape of the memory metal 703 can be restored to a preset state, when the shape of the memory metal 703 is restored to the preset state, can press trigger switch 701 and start cooling mechanism 9, cooling mechanism 9 can begin to cool down in installing box 1 like this to the effectual high resistance value grow that causes of heat of avoiding.

The working principle is as follows: when the protector is used, a person can install the back of the protector body 2 with the connecting plate 6 through a bolt, after the installation is finished, the groove body at the bottom of the connecting plate 6 can be inserted into the limiting bead in an aligning mode, then the top end of the connecting plate 6 is pushed into the groove 4, when the connecting plate 6 is pushed in, because the contact surface of the plug 504 and the connecting plate 6 is an inclined surface, when the connecting plate 6 is pressed inwards, the connecting rod 503 can push the reset spring 505 to contract, when the connecting plate 6 is completely pushed into the groove 4, the reset spring 505 can push the connecting rod 503 out, after the plug 504 is pushed out, the plug can be inserted into the slot to be fixed, so that the installation is finished, when the disassembly is finished, only the sliding block 501 needs to be moved upwards along the guide sliding groove 502, when the sliding block 501 is moved upwards, the plug 504 can be pushed out of the slot, so that the disassembly is finished, when the temperature in the installation box body 1 is overhigh, the memory metal 703 can recover to a preset shape under the high temperature, because the shape is spiral, the device can be tightened up after being heated, when the memory metal 703 shrinks upwards, the device can drive the trigger plate 704 to rise synchronously, when the device rises to the position of the trigger switch 701, the trigger plate 704 can press the trigger switch 701, when the trigger switch 701 is pressed, the cooling mechanism 9 can be started, when the cooling mechanism 9 is started, the pump body 905 can pump liquid, the cooling liquid in the liquid storage tank 901 is pumped out from the liquid outlet pipe 902 and passes through the flow guide pipe 904, and finally is discharged into the liquid storage tank 901 again from the liquid return pipe 903, when the cooling liquid passes through the position of the flow guide pipe 904, because the material of the flow guide pipe 904 is copper, the low temperature can be transmitted out of the pipe, the peripheral temperature of the flow guide pipe 904 is reduced, meanwhile, the cooling fan 906 is started, the started cooling fan 906 can discharge the low-temperature air at the position of the flow guide pipe 904 into the installation tank 1 to perform cooling treatment on the protector body 2, when the temperature is reduced, the memory metal 703 will slowly descend under the influence of the gravity of the trigger plate 704, so as to be far away from the trigger switch 701, and the cooling mechanism 9 can be turned off when the trigger switch 701 is not pressed.

To sum up, the utility model discloses a setting of trigger mechanism 7 and cooling mechanism 9, when the temperature rose in installation box 1, the shape retrieval of memory metal 703 is for presetting the state, when the shape retrieval of memory metal 703 is for presetting the state, can press trigger switch 701 and start cooling mechanism 9, cooling mechanism 9 can begin to cool down in installation box 1 like this, thereby the effectual too high resistance value grow that causes of avoiding the heat, setting through quick detach structure 5 and connecting plate 6, when needs are installed or are dismantled protector body 2, personnel's accessible quick detach structure 5 carries out quick dismantlement or installation to connecting plate 6 and protector body 2, like this can effectually save the time of installation and dismantlement, promote the efficiency of maintaining or maintenance.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a current transformer secondary overvoltage protector, is including installation box (1) and be located its inside protector body (2), its characterized in that: the front of installation box (1) articulates there is lid door (3), seted up recess (4) in installation box (1), the top of recess (4) is equipped with rapid disassembly structure (5), recess (4) have connecting plate (6) through rapid disassembly structure (5) fixed mounting, the front and protector body (2) fixed connection of connecting plate (6), the interior roof of installation box (1) is equipped with trigger mechanism (7), a plurality of air vents have been seted up to the interior diapire of installation box (1), the bottom of installation box (1) is equipped with link shell (8), be equipped with cooling mechanism (9) that are used for the accuse temperature in link shell (8).

2. A current transformer secondary overvoltage protector according to claim 1 wherein: quick detach structure (5) include slider (501), direction spout (502), connecting rod (503), plug (504) and reset spring (505), the inner wall of installation box (1) is seted up in direction spout (502), sliding connection has slider (501) in direction spout (502), the equal fixedly connected with connecting rod (503) in both sides of slider (501), the bottom fixedly connected with plug (504) of connecting rod (503), the slot with plug (504) looks adaptation is seted up to the both sides at connecting plate (6) top, the top of connecting rod (503) is equipped with reset spring (505).

3. A current transformer secondary overvoltage protector according to claim 1, wherein: trigger mechanism (7) are including trigger switch (701), limiting plate (702), memory metal (703) and trigger plate (704), one side fixed connection limiting plate (702) of trigger switch (701), be equipped with memory metal (703) between limiting plate (702) and trigger switch (701), the bottom of memory metal (703) is equipped with trigger plate (704).

4. A current transformer secondary overvoltage protector according to claim 1 wherein: cooling mechanism (9) include liquid reserve tank (901), drain pipe (902), return liquid pipe (903), honeycomb duct (904), the pump body (905) and cooling fan (906), the both sides at liquid reserve tank (901) top are fixedly connected with drain pipe (902) and return liquid pipe (903) respectively, be equipped with pump body (905) on returning liquid pipe (903), fixedly connected with honeycomb duct (904) between drain pipe (902) and return liquid pipe (903).

5. A current transformer secondary overvoltage protector according to claim 1 wherein: the mounting opening is formed in each of two sides of the mounting box body (1), a magnet is arranged in each mounting opening, a dustproof plate (10) is fixedly mounted at each mounting opening through the magnet, and a plurality of ventilation openings are formed in each dustproof plate (10).

6. A current transformer secondary overvoltage protector according to claim 2 wherein: the bottom of the guide sliding groove (502) is provided with two limiting beads, and two sides of the bottom of the connecting plate (6) are provided with groove bodies matched with the limiting beads.

7. The secondary overvoltage protector for a current transformer as claimed in claim 4 wherein: one side of the liquid storage tank (901) is provided with a liquid feeding pipe which is in through connection with the shell (8), and one end of the liquid feeding pipe which is in through connection with the shell (8) is in threaded connection with a cover body.