CN216793437U - Transformer neutral point grounding protection device - Google Patents

Abstract

The utility model relates to the technical field of transformers, and provides a transformer neutral point grounding protection device which is convenient to dissipate heat and comprises a protection device body, wherein the protection device body is provided with a protection box and a sealing plate, the protection box is internally connected with a bottom plate, the protection box is connected with a cooling pipe, two ends of the cooling pipe are respectively communicated with a water inlet pipe and a water outlet pipe, a valve is arranged on the water outlet pipe, the protection box is communicated with a plurality of installation frames, a fan is arranged in each installation frame, the bottom plate is provided with a plurality of through holes, the sealing plate is provided with a heat dissipation port, the heat dissipation port is connected with a protection assembly, the protection assembly comprises a protection frame, the protection frame is connected to the heat dissipation port, the top end of the protection frame is connected with a protection cover through a plurality of support rods, the heat dissipation port is provided with a drying box, drying agents are contained in the drying box, and a plurality of drying holes are formed in the drying box.

Description

Transformer neutral point grounding protection device

Technical Field

The utility model relates to the technical field of transformers, in particular to a protection device for grounding of a neutral point of a transformer.

Background

As is well known, a transformer neutral point is a point where a terminal connection point of a winding at one side of a transformer is firmly connected to the ground, and is mainly used for preventing overvoltage in a power system from damaging insulation of the winding of the transformer, and the damage of the neutral point can cause a fault in the whole transformer system, so that a protection device is required to protect the transformer neutral point.

Through retrieval, the transformer neutral point grounding protection device with the waterproof and damping functions disclosed by patent publication No. CN209804375U on 12/17/2019 is roughly described as comprising a protection box, wherein the protection box is of a hollow structure with an opening top surface, T-shaped chutes are vertically formed in the center positions of the peripheral inner walls of the protection box, sliding plates are arranged in the protection box, T-shaped sliding blocks are arranged at the centers of the peripheral outer walls of the sliding plates, the transformer neutral point grounding protection device with the waterproof and damping functions resists the vibration generated by the sliding plates in the protection box through the elasticity of a first spring arranged on the bottom surfaces of the sliding plates, so that a transformer on the sliding plates is damped, an insulator is effectively protected, the transformer can be integrally sealed to prevent external rainwater from falling at the connecting position of a three-phase coil and a leading-out distribution line, the connecting position of the three-phase coil and the leading-out distribution line are prevented from encountering water, causing a fire due to a short circuit in the distribution substation.

Although the safety is improved and the practicability is enhanced in the prior art, the transformer is arranged inside the protection box in the prior art, the protection box is a relatively closed space, the transformer generates heat in the working process, the internal temperature of the protection box rises, the transformer is not convenient to dissipate heat in the prior art, and the transformer can be damaged at high temperature in long-time work.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a protection device for grounding of a neutral point of a transformer, aiming at overcoming the defects in the prior art, and solving the problem that the prior art provided by the background art is inconvenient to dissipate heat.

(II) technical scheme

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a protection device of transformer neutral point ground connection, includes the protection device body, the protection device body is equipped with guard box and shrouding, the internal connection of guard box has the bottom plate, be connected with the cooling tube on the guard box, the both ends of cooling tube communicate respectively has inlet tube and outlet pipe, be provided with the valve on the outlet pipe, the guard box intercommunication has a plurality of installing frames, the internally mounted of installing frame has the fan, a plurality of through-holes have been seted up on the bottom plate, the thermovent has been seted up on the shrouding, thermovent department is connected with protective component to thermovent department installs the drying cabinet, the drying agent has been held in the inside of drying cabinet, a plurality of drying holes have been seted up on the drying cabinet.

Preferably, the protection component comprises a protection frame, the protection frame is connected to the position of the heat dissipation opening, and the top end of the protection frame is connected with a protection cover through a plurality of supporting rods.

Furthermore, a plurality of mounting openings are formed in the protection box, and cooling fins are arranged inside the mounting openings.

Still further, the top end of the water inlet pipe is in threaded connection with a blocking cover.

As a further scheme of the scheme, a plurality of mounting plates are connected to the drying box, mounting holes are formed in the mounting plates, mounting bolts are arranged in the mounting holes, and a plurality of mounting screw holes matched with the mounting bolts are formed in the sealing plate.

As a further scheme of the scheme, a box cover is slidably mounted on the drying box.

On the basis of the scheme, the protective cover is a herringbone top.

On the basis of the scheme, the top end of the box cover is connected with a pull ring.

(III) advantageous effects

Compared with the prior art, the utility model provides a protection device for grounding of a neutral point of a transformer, which has the following beneficial effects:

according to the utility model, cold water can be added into the cooling pipe through the water inlet pipe to cool the inside of the protection box, air can be blown into the protection box through the fan, the cold air is blown to the upper part of the bottom plate through the through hole to cool the transformer, hot air is discharged out of the protection box through the heat dissipation port, the drying in the protection box is ensured through the drying agent, the short circuit and the like of the transformer when meeting water are avoided, and compared with the prior art, the scheme is convenient for heat dissipation.

Drawings

FIG. 1 is a partially cut-away perspective view of the present invention;

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

FIG. 3 is a schematic perspective view of the mounting plate, mounting bolts, case cover and pull ring of the present invention;

fig. 4 is a schematic perspective view of a sealing plate, a protection frame, a protection cover, etc. in a partially cut-away perspective view.

In the figure: 1. a protection box; 2. closing the plate; 3. a base plate; 4. a cooling tube; 5. a water inlet pipe; 6. a water outlet pipe; 7. a valve; 8. installing a frame; 9. a fan; 10. a drying oven; 11. a protective frame; 12. a protective cover; 13. a heat sink; 14. a blocking cover; 15. mounting a plate; 16. installing a bolt; 17. a box cover; 18. and (4) a pull ring.

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.

Examples

Referring to fig. 1-4, a transformer neutral point grounding protection device comprises a protection device body, the protection device body is provided with a protection box 1 and a sealing plate 2, a bottom plate 3 is connected inside the protection box 1, a cooling pipe 4 is connected on the protection box 1, two ends of the cooling pipe 4 are respectively communicated with a water inlet pipe 5 and a water outlet pipe 6, cold water can be added into the cooling pipe 4 through the water inlet pipe 5 to cool the inside of the protection box 1, a blocking cover 14 is connected to the top end of the water inlet pipe 5 through a thread so as to seal the water inlet pipe 5 and prevent external impurities from entering the inside of the water inlet pipe 5, a valve 7 is arranged on the water outlet pipe 6, the water outlet pipe 6 can be opened and closed through the valve 7 to control the outflow of the cold water, the protection box 1 is communicated with a plurality of installation frames 8, a fan 9 is arranged inside the installation frames 8, a plurality of through holes are arranged on the bottom plate 3, air can be blown into the protection box 1 through the fan 9, blow the top of sending bottom plate 3 with cold air through the through-hole, cool down the transformer, seted up a plurality of installing ports on the guard box 1, the internally mounted of installing port has fin 13, can be with the heat transfer in the guard box 1 to the outside air in through fin 13, has seted up the thermovent on the shrouding 2, and thermovent department is connected with protection component.

It should be further noted that the protection assembly includes a protection frame 11, the protection frame 11 is connected to the heat dissipating port, the top end of the protection frame 11 is connected to a protection cover 12 through a plurality of support rods, the heat dissipating port can be protected by the protection cover 12, so as to prevent impurities from entering the protection box 1 through the heat dissipating port, and at the same time, the entry of moisture can be reduced, the protection cover 12 is a herringbone roof, rainwater and the like can fall off on the top end of the protection cover 12, so as to facilitate the waterproof protection of the heat dissipating port, the drying box 10 is installed at the heat dissipating port, the drying box 10 is connected to a plurality of mounting plates 15, the mounting plates 15 are provided with mounting holes, the mounting holes are internally provided with mounting bolts 16, the sealing plate 2 is provided with a plurality of mounting screw holes matched with the mounting bolts 16, the drying box 10 can be conveniently disassembled and assembled through the mounting bolts 16, and a drying agent is contained in the drying box 10, a plurality of drying holes are formed in the drying box 10, the box cover 17 is slidably mounted on the drying box 10, the drying box 10 is convenient to seal, drying agents are prevented from being spilled, certain damping exists between the box cover 17 and the drying box 10, the stability of the box cover 17 is guaranteed, the top end of the box cover 17 is connected with the pull ring 18, and an operator can conveniently hold the box cover 17 to detach the box cover 17.

The blower 9 in this embodiment is a conventional device purchased on the market and known to those skilled in the art, and the model can be selected or customized according to actual needs, and in this patent, we only use it, and do not improve its structure and function, and its setting mode, installation mode, and electrical connection mode, for those skilled in the art, as long as they perform debugging operations according to the requirements of their usage specifications, are not described here again.

In summary, when the transformer neutral point grounding protection device is used, the transformer neutral point grounding protection device is firstly placed at a required using place, the transformer is installed inside the protection box 1, the baffle cover 14 is screwed down, cold water is added into the cooling pipe 4 through the water inlet pipe 5, the interior of the protection box 1 is cooled, air can be blown into the interior of the protection box 1 through the fan 9, cold air is blown to the upper part of the bottom plate 3 through the through holes, the transformer is cooled, the hot air is discharged out of the protection box 1 through the heat dissipation port, the drying in the protection box 1 is ensured through the drying agent, when the drying agent needs to be replaced, the drying box 10 is disassembled by unscrewing the mounting bolts 16, then the box cover 17 is disassembled by pulling the pull ring 18, after the drying agent is replaced, the box cover 17 is attached to the drying box 10, and the drying box 10 is attached by the attachment bolts 16.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. A protection device for grounding of a neutral point of a transformer comprises a protection device body, wherein the protection device body is provided with a protection box (1) and a sealing plate (2), and is characterized in that a bottom plate (3) is connected inside the protection box (1), a cooling pipe (4) is connected on the protection box (1), two ends of the cooling pipe (4) are respectively communicated with a water inlet pipe (5) and a water outlet pipe (6), a valve (7) is arranged on the water outlet pipe (6), the protection box (1) is communicated with a plurality of mounting frames (8), a fan (9) is installed inside the mounting frames (8), a plurality of through holes are formed in the bottom plate (3), a heat dissipation opening is formed in the sealing plate (2), a protection component is connected at the heat dissipation opening, a drying box (10) is installed at the heat dissipation opening, a drying agent is contained inside the drying box (10), the drying box (10) is provided with a plurality of drying holes.

2. The transformer neutral point grounding protection device according to claim 1, wherein the protection assembly comprises a protection frame (11), the protection frame (11) is connected to the heat sink, and a protection cover (12) is connected to the top end of the protection frame (11) through a plurality of support rods.

3. The transformer neutral point grounding protection device according to claim 2, characterized in that a plurality of mounting openings are formed on the protection box (1), and cooling fins (13) are mounted inside the mounting openings.

4. A transformer neutral grounding protector according to claim 3 characterized in that the top end of the water inlet pipe (5) is screwed with a cover (14).

5. The transformer neutral point grounding protection device according to claim 4, wherein a plurality of mounting plates (15) are connected to the drying box (10), mounting holes are formed in the mounting plates (15), mounting bolts (16) are arranged inside the mounting holes, and a plurality of mounting screw holes matched with the mounting bolts (16) are formed in the sealing plate (2).

6. A transformer neutral grounding protection device according to claim 5, characterized in that a box cover (17) is slidably mounted on the drying box (10).

7. A transformer neutral grounding protection device according to claim 6, characterized in that the protection cover (12) is a herringbone top.

8. A transformer neutral grounding protection device according to claim 7, characterized in that the top end of the box cover (17) is connected with a pull ring (18).

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