CN220065404U

CN220065404U - Transformer core grounding leakage current protection device

Info

Publication number: CN220065404U
Application number: CN202223211755.5U
Authority: CN
Inventors: 林梓栎; 丁骥骁
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-11-21
Anticipated expiration: 2032-11-30

Abstract

The utility model belongs to the technical field of transformer safety monitoring, and particularly relates to a transformer core grounding leakage current protection device, which comprises a supporting part, a transmission part, a protection unit and a motor, wherein the motor is arranged on the supporting part, the transmission part and the protection unit are arranged in the supporting part, the motor is connected with the transmission part, the protection unit is connected with the supporting part and is electrically connected with an iron core, when the iron core leaks current, the motor drives the transmission part to drive the supporting part to work with the protection unit, the supporting part can form a space for isolating the external environment so as to warn and protect personal safety of surrounding personnel, and meanwhile, the protection unit is matched with the transmission part and the supporting part to shunt leakage current on the iron core, so that the working efficiency of the transformer is reduced or the transformer is damaged due to current leakage is reduced.

Description

Transformer core grounding leakage current protection device

Technical Field

The utility model relates to the technical field of transformer safety monitoring, in particular to a transformer core grounding leakage current protection device.

Background

The transformer is basic equipment of power transmission and distribution, when the transformer works, alternating current voltage is changed by utilizing the principle of electromagnetic induction, the transformer can generate iron core leakage current due to faults at certain positions in the working process, the existing detection mode for the leakage current of the transformer is that a worker regularly carries detection equipment to detect current passing through an iron core so as to determine whether the current exceeds a threshold value, and the detection mode cannot timely find out the condition that the leakage current occurs in the iron core of the transformer, so that the transformer cannot be timely subjected to fault maintenance, unnecessary economic loss is easy to cause, and meanwhile, when the iron core leaks current, early warning cannot be carried out on surrounding personnel, and certain threat is caused to personal safety of the surrounding personnel of the transformer.

Disclosure of Invention

The utility model aims to provide a transformer core grounding leakage current protection device which is used for solving the problems that the existing monitoring mode cannot timely find out the situation that the transformer core generates leakage current, so that the transformer cannot be timely subjected to fault maintenance, unnecessary economic loss is easy to cause, meanwhile, when the core leaks current, surrounding personnel cannot be warned, and the personal safety of the surrounding personnel of the transformer is threatened to a certain extent.

In order to achieve the above purpose, the utility model provides a transformer core grounding leakage current protection device, comprising a supporting part, wherein the supporting part comprises a plurality of first supporting plates, a plurality of second supporting plates, a top plate and sliding rails, the lower surface of the top plate is fixedly connected with the top ends of the first supporting plates, the sliding rails are fixedly connected with the inner surfaces of the first supporting plates, the tail ends of the second supporting plates are respectively provided with a roller, and the second supporting plates are slidably connected in the sliding rails through the rollers;

the supporting part also comprises a supporting plate arranged in the space surrounded by the plurality of first supporting plates, the transformer is arranged on the supporting plate, and a protection unit is arranged between the supporting plate and each second supporting plate;

the transformer core grounding leakage current monitoring device further comprises a motor arranged on the upper surface of the top plate and a transmission part arranged on the lower surface of the top plate, a transmission shaft of the motor penetrates through the top plate to be connected with the transmission part, the protection unit is electrically connected with the core, and the transmission part drives the second support plate to move in the sliding rail.

Further, the first supporting plate and the second supporting plate are arc-shaped, and the radian of the first supporting plate is matched with that of the second supporting plate.

Further, the transmission part comprises a first gear fixedly connected to the transmission shaft, a plurality of tooth grooves are formed in the inner surface of each second support plate, the first gear is meshed with a plurality of second gears corresponding to the second support plates one by one, each second gear is meshed with the tooth grooves formed in the corresponding second support plate, the upper surface of each second gear is rotationally connected with a connecting rod, and each connecting rod is fixedly connected with the lower surface of the top plate.

Further, the protection unit comprises graphite rods arranged on the inner surface of each second supporting plate, the radian of each graphite rod is matched with that of each second supporting plate, a plurality of first contact pieces corresponding to the graphite rods one by one are arranged on the supporting plate, the first contact pieces are in contact with the outer surfaces of the graphite rods, the first contact pieces are electrically connected with the iron cores, and one ends of the graphite rods are electrically connected with the iron cores.

Further, the inner surface of any second supporting plate is provided with a conductive block, the radian of the conductive block is matched with that of the second supporting plate, the conductive block is electrically connected with the iron core, the lower surface of the top plate is fixedly connected with a second contact piece, the second contact piece is contacted with the outer surface of the conductive block, and the second contact piece is electrically connected with the motor.

Further, the iron core is connected with a current sensor, a controller is arranged on the top plate, the current sensor is electrically connected with the controller, and the controller is electrically connected with the motor.

Further, a ceramic plate is mounted at one end of the conductive block.

Further, the spout has all been seted up to the internal surface of every first backup pad, and every second backup pad surface corresponds the department with the spout and rotates and be connected with the warning pole, is equipped with warning light and warning flag on every warning pole, and the surface of every warning pole and the surface of second backup pad are equipped with the spring of both ends with warning pole and second backup pad rigid coupling respectively.

Further, a through groove is formed in any one of the first support plates, a door is arranged in the through groove, one side of the door is rotationally connected with the through groove through a hinge, and the other side of the door is connected with the other side of the through groove through a lock catch.

Further, each first supporting plate and each second supporting plate are made of polytetrafluoroethylene materials.

Compared with the prior art, the utility model has the remarkable advantages that:

1. the transmission part is driven by the motor to drive the second support plate to move between two adjacent first support plates, so that a space for isolating the external environment is formed, and meanwhile, the warning rod is additionally arranged on the second support plate, so that surrounding personnel are reminded of being far away from the space, and the personal safety of the surrounding personnel is protected.

2. The circuit formed by the first contact piece and the graphite rod is connected in parallel to the iron core so as to realize the split of the iron core of leakage current, and meanwhile, the graphite rod can be used as a resistor for consuming current due to the characteristic of high resistivity of graphite.

3. When the second supporting plate moves between two adjacent first supporting plates, the second contact piece is in contact with the ceramic piece, and an open circuit is formed between the motor and the current sensor due to the insulativity of the ceramic, so that the motor stops working, and the situation that the second supporting plate drives the graphite rod to continuously move to be disconnected with the first contact piece is avoided.

Drawings

FIG. 1 is a main body diagram of the present utility model;

FIG. 2 is a cross-sectional view of the present utility model;

FIG. 3 is an enlarged view of the utility model at A of FIG. 2;

FIG. 4 is an enlarged view of the utility model at B of FIG. 2;

FIG. 5 is a schematic view of the structure of the conductive block and graphite rod on the second support plate of the present utility model;

fig. 6 is a side view of the warning lever and the second support plate of the present utility model.

In the figure: the support part 1, the first support plate 101, the second support plate 102, the top plate 103, the slide rail 104, the current sensor 2, the transmission part 3, the first gear 301, the second gear 302, the tooth slot 303, the protection unit 4, the graphite rod 401, the first contact piece 402, the warning rod 5, the conductive block 6, the second contact piece 7, the ceramic piece 8 and the door 9.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the utility model, fall within the scope of protection of the utility model.

The utility model provides a transformer core grounding leakage current protection device, which comprises a support part 1, wherein the support part 1 comprises a plurality of first support plates 101, a plurality of second support plates 102, a top plate 103 and a sliding rail 104, the lower surface of the top plate 103 is fixedly connected with the top end of each first support plate 101, the sliding rail 104 is fixedly connected with the inner surface of each first support plate 101, the tail end of each second support plate 102 is provided with a roller, and the second support plates are connected in the sliding rail 104 in a sliding way through the rollers;

the supporting part 1 further comprises a supporting plate arranged in a space surrounded by the first supporting plates 101, the transformer is arranged on the supporting plate, and a protection unit 4 is arranged between the supporting plate and each second supporting plate 102;

the transformer core grounding leakage current monitoring device further comprises a motor arranged on the upper surface of the top plate 103 and a transmission part 3 arranged on the lower surface of the top plate 103, a transmission shaft of the motor penetrates through the top plate 103 to be connected with the transmission part 3, the protection unit 4 is electrically connected with the core, and the transmission part 3 drives the second support plate 102 to move in the sliding rail 104.

When the transformer is used for grounding the iron core and has the leakage phenomenon, the motor drives the transmission shaft to drive the transmission part 3 to drive the second support plate 102 to move between two adjacent first support plates 101 in the slide rail 104, meanwhile, the protection unit 4 also starts working along with the second support plate 102, so that the length of a power-on conductor in a circuit formed by the protection unit 4 is increased, and meanwhile, in the embodiment, the protection unit is connected with the iron core in parallel, so that the purpose of shunting the current passing through the iron core is achieved, the working efficiency of the transformer is reduced or the transformer is damaged due to the leakage current of the iron core is reduced;

when the second supporting plate 102 moves between two adjacent first supporting plates 101, the first supporting plates 101 and the second supporting plates 102 are mutually matched to form a space for isolating an external environment, so that surrounding personnel are prevented from being in close contact with an iron core of leakage current, personnel safety of the surrounding personnel is improved, maintenance personnel is conveniently informed of timely maintenance of the leakage current phenomenon of the iron core of the transformer, compared with the prior art, the transformer is required to be regularly carried by the personnel to be detected and troubleshooted, the leakage phenomenon of the iron core cannot be timely found, unnecessary loss is caused, in the utility model, the effect of monitoring the iron core in real time is achieved when the iron core of the transformer is subjected to shunt protection through the mutual matching of the motor, the transmission part 3, the protection unit 4 and other parts, the situation that the leakage current of the iron core cannot be timely found, the leakage current of the iron core is timely checked and overhauled is avoided, and unnecessary economic loss is caused is avoided;

meanwhile, by arranging the rollers at the tail end of the second support plate 102, friction between the second support plate 102 and the inner wall of the sliding rail 104 is reduced, and mobility of the second support plate 102 under the driving of the transmission part 3 is improved.

As a specific embodiment of the present utility model, the first support plate 101 and the second support plate 102 are arc-shaped, and the radian of the first support plate 101 is adapted to the radian of the second support plate 102.

The first support plate 101 and the second support plate 102 are set to be arc-shaped with adaptive radians, so that the second support plate 102 does not generate more collision and friction with the slide rail 104 or the first support plate 101 when moving in the slide rail 104, thereby reducing the moving speed of the second support plate 102 or causing the second support plate 102 to be blocked.

As a specific embodiment of the present utility model, the transmission part 3 includes a first gear 301 fixedly connected to the transmission shaft, the inner surface of each second support plate 102 is provided with a plurality of tooth grooves 303, the first gear 301 is meshed with a plurality of second gears 302 corresponding to the second support plates 102 one by one, each second gear 302 is respectively meshed with the tooth groove 303 provided on the corresponding second support plate 102, the upper surface of each second gear 302 is rotatably connected with a connecting rod, and each connecting rod is fixedly connected with the lower surface of the top plate 103.

As a specific embodiment of the present utility model, the protection unit 4 includes graphite rods 401 mounted on the inner surface of each second support plate 102, the radian of each graphite rod 401 is adapted to that of each second support plate 102, a plurality of first contact plates 402 corresponding to the graphite rods 401 one by one are mounted on the support plate, the first contact plates 402 are contacted with the outer surface of each graphite rod 401, each first contact plate 402 is electrically connected with the iron core, and one end of each graphite rod 401 is electrically connected with the iron core.

Because the first contact piece 402 is electrically connected with the iron core, one end of the graphite rod 401 is electrically connected with the iron core, and meanwhile, the first contact piece 402 is contacted with the graphite rod 401, so that the first contact piece 402 and the graphite rod 401 form a circuit connected with the iron core in parallel, and the iron core of leakage current is shunted;

when no current leakage occurs in the iron core, the first contact piece 402 is in contact with one end of the graphite rod 401 electrically connected with the iron core, at this time, the resistance value in a circuit formed between the graphite rod 401 and the first contact piece 402 is the lowest value, and when leakage current occurs in the iron core, the motor controls the transmission shaft to drive the first gear 301 to drive the second gear 302 to rotate, at this time, the second support plate 102 moves towards one end of the graphite rod 401 electrically connected with the iron core under the mutual matching of the second gear 302 and the tooth groove 303, and at the same time, the graphite rod 401 also moves along with the second support plate 102, at this time, the distance between one end of the graphite rod 401 electrically connected with the iron core and the first contact piece 402 is continuously increased, and the graphite rod can be used as a resistance which consumes the current action because of the graphite, so that the resistance value in the circuit formed by the first contact piece 402 and the graphite rod 401 is continuously increased when the graphite rod 401 moves, and the situation that a transformer is damaged due to the leakage current of the iron core for a long time is reduced.

In one embodiment, the length of the first contact piece 402 is set to be longer than the maximum distance between the first contact piece 402 and the graphite rod 401, so that the first contact piece 402 and the graphite rod 401 can be always connected with the outer surface of the graphite rod 401 when in operation, and the situation that the first contact piece 402 and the graphite rod 401 are disconnected when in operation due to the arc shape of the graphite rod 401 is avoided;

as an alternative embodiment in this example, a standby power supply electrically connected to the motor is installed on the top plate 103, when the worker finishes repairing the transformer, the worker starts the standby power supply, and then drives the motor to rotate reversely, so that the second support plate 102 moves reversely, and when the graphite rod 401 is separated from the end electrically connected to the iron core and is in contact with the first contact piece 402 again, the worker turns off the standby power supply, so that the support part 1 and the protection unit 4 are restored to the state when no current leaks from the iron core.

As a specific embodiment of the present utility model, the inner surface of any second support plate 102 is provided with a conductive block 6, the conductive block 6 is matched with the radian of the second support plate 102, the conductive block 6 is electrically connected with the iron core, the lower surface of the top plate 103 is fixedly connected with a second contact piece 7, the second contact piece 7 is contacted with the outer surface of the conductive block 6, and the second contact piece 7 is electrically connected with the motor.

As a specific embodiment of the present utility model, a ceramic plate 8 is mounted on one end of the conductive block 6.

In one embodiment, the current leaked from the iron core is conveyed into the motor through the conductive block 6 and the second contact piece 7, so that the motor drives the second supporting plate 102 to drive the graphite rod 401 to move;

when the iron core does not have leakage current, the second contact piece 7 is contacted with one end of the conductive block 6 far away from the ceramic piece 8, when the iron core has leakage current, the second support plate 102 is driven to move towards one end of the conductive block 6, where the ceramic piece 8 is not mounted, in the moving process of the second support plate 102 between the two adjacent first support plates 101, at the moment, the distance between the second contact piece 7 and the ceramic piece 8 is gradually reduced, when the second support plate 102 moves between the two adjacent first support plates 101, the second contact piece 7 is contacted with the ceramic piece 8, and the ceramic has insulativity, so that a circuit between the motor and the iron core is broken, at the moment, the second support plate 102 can not move along the sliding rail 104, and meanwhile, a circuit formed between the first contact piece 402 and the graphite rod 401 can not be caused by continuous movement of the second support plate 102, so that the separation between the tooth groove 303 and the second gear 302 is avoided, the service life of the equipment is prolonged, and the work difficulty of restoring the second support plate 102 to an initial normal state after the maintenance of the transformer is completed is reduced for workers.

As a specific embodiment of the present utility model, the iron core is connected with a current sensor 2, a controller is mounted on the top plate 103, the current sensor 2 is electrically connected with the controller, and the controller is electrically connected with the motor.

In one embodiment, when the current sensor 2 detects leakage current of the iron core, the controller controls the motor to start and drives the second support plate to drive the graphite rod 401 to move, when the motor runs for a preset time, the controller controls the motor to be closed, at this time, the second support plate 102 moves between two adjacent first support plates 101, meanwhile, a circuit formed by the graphite rod 401 and the first contact piece 402 is divided for the iron core, after the transformer is overhauled by a worker, the controller controls the motor to rotate reversely, so that the second support plate 102 drives the graphite rod 401 to move reversely along the sliding rail 104, and when one end of the graphite rod 401, which is far away from the end electrically connected with the iron core, is contacted with the first contact piece 402 again, the worker controls the motor to be closed through the controller, so that the support part 1 and the protection unit 4 are restored to a state when no leakage current of the iron core occurs.

As a specific embodiment of the utility model, the inner surface of each first supporting plate 101 is provided with a chute, the position of the outer surface of each second supporting plate 102 corresponding to the chute is rotationally connected with a warning rod 5, each warning rod 5 is provided with a warning lamp and a warning flag, and the outer surface of each warning rod 5 and the outer surface of each second supporting plate 102 are provided with springs with two ends respectively fixedly connected with the warning rod 5 and the second supporting plate 102.

In the process that the second supporting plate moves between two adjacent first supporting plates, the warning rod rotationally connected with the outer surface of the second supporting plate drives the warning lamp and the warning flag to pop up under the action of the spring, reminds surrounding personnel to keep away from the transformer as soon as possible, and simultaneously is convenient for timely notifying the personnel to repair the transformer at the place;

after maintenance is finished, the second support plate is rotationally connected with the second support plate in the process of reverse movement, so that the second support plate is close to the outer surface of the second support plate under the limit of the chute of the first support plate until the second support plate is completely retracted into the chute of the first support plate.

As a specific embodiment of the utility model, a door 9 is arranged in the through groove, one side of the door 9 is rotationally connected with the through groove through a hinge, and the other side of the door 9 is connected with the other side of the through groove through a lock catch.

Staff can enter the space formed by the first supporting plate 101 and the second supporting plate 102 through the door 9 arranged on the first supporting plate 101, so that the transformer is maintained, and meanwhile, the iron core, which is randomly close to leakage current by non-staff, is prevented from being buckled, so that personal safety protection of surrounding staff is improved.

As an embodiment of the present utility model, each of the first support plates 101 and each of the second support plates 102 are made of polytetrafluoroethylene material.

The polytetrafluoroethylene material has the characteristics of good high temperature resistance and corrosion resistance, so that the service lives of the first supporting plate 101 and the second supporting plate 102 are prolonged, meanwhile, when the iron core continuously leaks current, the first supporting plate 101 and the second supporting plate 102 cannot be damaged due to the principle of point heating, and meanwhile, the polytetrafluoroethylene material has good electrical insulation performance, so that the personal safety of surrounding personnel is further improved.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model 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 transformer core ground leakage current protection device which characterized in that: the device comprises a supporting part (1), wherein the supporting part (1) comprises a plurality of first supporting plates (101), a plurality of second supporting plates (102), a top plate (103) and sliding rails (104), the lower surface of the top plate (103) is fixedly connected with the top ends of the first supporting plates (101), the sliding rails (104) are fixedly connected with the inner surfaces of the first supporting plates (101), the tail ends of the second supporting plates (102) are provided with rolling wheels, and the second supporting plates are connected in the sliding rails (104) in a sliding manner through the rolling wheels;

the supporting part (1) further comprises a supporting plate arranged in a space surrounded by the first supporting plates (101), the transformer is arranged on the supporting plate, and a protection unit (4) is arranged between the supporting plate and each second supporting plate (102);

the transformer core grounding leakage current monitoring device further comprises a motor arranged on the upper surface of the top plate (103) and a transmission part (3) arranged on the lower surface of the top plate (103), a transmission shaft of the motor penetrates through the top plate (103) to be connected with the transmission part (3), the protection unit (4) is electrically connected with the core, and the transmission part (3) drives the second support plate (102) to move in the sliding rail (104).

2. The transformer core ground leakage current protection device of claim 1, wherein: the first supporting plate (101) and the second supporting plate (102) are arc-shaped, and the radian of the first supporting plate (101) is matched with that of the second supporting plate (102).

3. The transformer core ground leakage current protection device of claim 2, wherein: the transmission part (3) comprises a first gear (301) fixedly connected to a transmission shaft, a plurality of tooth grooves (303) are formed in the inner surface of each second supporting plate (102), the first gears (301) are meshed with a plurality of second gears (302) corresponding to the second supporting plates (102) one by one, each second gear (302) is meshed with the tooth groove (303) formed in the corresponding second supporting plate (102) respectively, a connecting rod is rotationally connected to the upper surface of each second gear (302), and each connecting rod is fixedly connected with the lower surface of the top plate (103).

4. A transformer core ground leakage current protection device according to claim 3, wherein: the protection unit (4) is including installing in graphite rod (401) of every second backup pad (102) internal surface, the radian looks adaptation of graphite rod (401) and second backup pad (102), install a plurality of first contact pieces (402) with graphite rod (401) one-to-one on the layer board, first contact piece (402) are contacted with the surface of graphite rod (401), and the electricity is connected between each first contact piece (402) and the iron core, and the electricity is connected between the one end and the iron core of each graphite rod (401).

5. The transformer core ground leakage current protection device of claim 4, wherein: any second backup pad (102) internal surface installs conducting block (6), the radian looks adaptation of conducting block (6) and second backup pad (102), electric connection between conducting block (6) and the iron core, the lower surface rigid coupling of roof (103) has second contact piece (7), and second contact piece (7) are contacted with the surface of conducting block (6), electric connection between second contact piece (7) and the motor.

6. The transformer core ground leakage current protection device of claim 4, wherein: the iron core is connected with a current sensor (2), a controller is arranged on the top plate (103), the current sensor (2) is electrically connected with the controller, and the controller is electrically connected with the motor.

7. The transformer core ground leakage current protection device of claim 5, wherein: one end of the conductive block (6) is provided with a ceramic plate (8).

8. The transformer core ground leakage current protection device of claim 1, wherein: the inner surface of every first backup pad (101) has all been seted up the spout, and every second backup pad (102) surface corresponds department with the spout and rotates and be connected with warning pole (5), is equipped with warning light and warning flag on every warning pole (5), and the surface of every warning pole (5) and the surface of second backup pad (102) are equipped with the spring of both ends with warning pole (5) and second backup pad (102) rigid coupling respectively.

9. The transformer core ground leakage current protection device of claim 5, wherein: a through groove is formed in any one of the first supporting plates (101), a door (9) is arranged in the through groove, one side of the door (9) is rotationally connected with the through groove through a hinge, and the other side of the door (9) is connected with the other side of the through groove through a buckle lock.

10. The transformer core ground leakage current protection device of claim 1, wherein: each first supporting plate (101) and each second supporting plate (102) are made of polytetrafluoroethylene materials.