CN215911272U

CN215911272U - Transformer neutral point grounding device

Info

Publication number: CN215911272U
Application number: CN202121167911.5U
Authority: CN
Inventors: 路建新
Original assignee: Baoding Xinhai Electrical Co ltd
Current assignee: Baoding Xinhai Electrical Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2022-02-25
Anticipated expiration: 2031-05-28

Abstract

The utility model discloses a transformer neutral point grounding device which comprises a main supporting column, wherein a steel plate is fixed at the bottom of the main supporting column, a mixed coagulation block is arranged at the bottom of the steel plate, a bolt sleeve is arranged on the steel plate, a threaded rod is arranged in the concrete block, a cross supporting beam is fixed at the top of the main supporting column, a protective box is arranged at the top of the cross supporting beam, a mutual inductor combination device is arranged in the protective box, the mixed coagulation block and the steel plate are fastened and fixed with the threaded rod through the bolt sleeve, the device can be more stable on the ground, the protective box and the ventilation device in the protective box can well prevent the mutual inductor combination device from being corroded, and the service life of the device is prolonged.

Description

Transformer neutral point grounding device

Technical Field

The utility model belongs to the technical field of transformers, and particularly relates to a transformer neutral point grounding device.

Background

The neutral point grounding protection device is widely applied to neutral points of power transformers of 110kV, 220kV, 330kV, 500kV and the like to realize grounding operation or non-grounding operation of the neutral points of the transformers, so that damage to the transformers caused by overhigh voltage or overlarge current of the neutral points of the transformers due to system faults is avoided.

The transformer neutral point grounding device disclosed by the license publication No. CN211480885U comprises a cement column, a base arranged at the top end of the cement column, a current transformer and a lightning arrester which are fixedly arranged on the upper surface of the base through screws, wherein a small insulator is arranged at the top end of the current transformer; the technical key points are that the manual mechanism is fixed on the surface of the cement column by using a support mechanism, and when the support mechanism is used, two groups of steel hoops are utilized, and a stable triangular structure is formed by a main supporting rod and an auxiliary supporting rod, so that the stability of the installation position of the whole manual mechanism is ensured; the lightning arrester and the small insulator can be detected to work normally or not by assembling the two groups of current sensors into the corresponding lightning arrester and the small insulator, if the records of current data exceeding a certain numerical value are displayed on the control panel, the lightning arrester or the small insulator is damaged, and the lightning arrester or the small insulator can be directly replaced or maintained under the condition that subsequent detection is not needed.

However, the above-mentioned transformer neutral grounding device is not stable enough in ground stability, has no reinforcing device, may directly collapse to cause device damage when being collided, and has no corresponding protection device, and the device on the lower top part may be corroded and damaged after being used for a long time.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a transformer neutral point grounding device to solve the problems that ground reinforcement is not arranged and corresponding protective measures are not provided.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a transformer neutral point grounding device, includes main stay post, and the main stay post is used for supporting the weight of whole device, the bottom of main stay post is fixed with the steel sheet, and the steel sheet is the stainless steel and becomes to avoid the corrosion fracture, the bottom of steel sheet is provided with mixes the clot, and the piece of coagulating pricks completely in the middle of standing in earth, be provided with the bolt cover on the steel sheet, the inside threaded rod that is provided with of concrete piece, bolt cover compress tightly the steel sheet to mixing the clot on, the top of main stay post is fixed with the spreader beam, the top of spreader beam is provided with the guard box, be provided with mutual-inductor composite set in the guard box, the guard box is used for protecting mutual-inductor composite set, can reduce it and receive corruption increase of service life such as sun exposure rainwater.

Preferably, the outside cladding of steel sheet has the protection pad, and the protection pad cladding is on the surface of steel sheet completely, the protection pad is made by rubber materials, and the protection pad of making through rubber both can prevent that the pedestrian from damaging also can insulate.

Preferably, the concrete block is formed by solidifying concrete, the concrete has the characteristics of high compressive strength, good durability, wide strength grade range and the like, meanwhile, the raw materials are rich, the price is low, the production process is simple, the steel plate can be used in a large amount, the steel plate is completely coated on the surface of the concrete block, the device can be prevented from shaking, and the corrosion of the concrete block can also be reduced.

Preferably, the bolt sleeve is tightened with the threaded rod through screw-thread fit, the bottom of threaded rod is connected through the welding post, is tightened through bolt sleeve and threaded rod screw-thread mode and is conveniently dismantled the installation, makes the steel sheet compress tightly on the piece that congeals completely through the bolt sleeve moreover, and the threaded rod through the welding columnar connection sinks completely in the piece that congeals and makes the threaded rod fixed more firmly.

Preferably, install the chamber door through the hinge on the guard box, be provided with the safety lock on the chamber door, the chamber door that has the hinge through the setting can conveniently be opened and overhaul, can avoid other people to open moreover and reduce dangerous hidden danger through setting up the safety lock.

Preferably, the light is installed at the inside top of protective housing, be provided with the observation window on the chamber door, can conveniently observe the inside condition through observation window and the light that sets up and reduce unnecessary and open raise the efficiency.

Preferably, be provided with the ventilation fan on the spreader bar of protective housing bottom, the side of protective housing is provided with the grid of ventilating, and through the ventilation fan that sets up and the grid of ventilating, can start the ventilation fan and ventilate the heat dissipation and avoid the high temperature to cause the damage to protective housing inside.

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

1. the mixed clot and the steel plate are fastened and fixed with the threaded rod through the bolt sleeve, so that the device is more stable on the ground;

2. through the protection box that is equipped with and inside ventilation setting, the life that avoids mutual-inductor composite set to receive erosion extension fixture that can be fine.

Drawings

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

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

FIG. 3 is a cross-sectional view of the protective case of the present invention.

In the figure: 1. a main stay; 2. a protective pad; 3. a steel plate; 4. mixing and coagulating the blocks; 5. a bolt sleeve; 6. a threaded rod; 7. welding the column; 8. a cross-brace beam; 9. a protective box; 10. a hinge; 11. a box door; 12. an observation window; 13. a safety lock; 14. an illuminating lamp; 15. a ventilating fan; 16. a ventilation grille; 17. provided is a mutual inductor combination device.

Detailed Description

Please refer to fig. 1, fig. 2, fig. 3, a transformer neutral point grounding device, which includes a main supporting column 1, the main supporting column 1 is used for supporting the weight of the whole device, a steel plate 3 is fixed at the bottom of the main supporting column 1, the steel plate 3 is made of stainless steel to avoid corrosion and fracture, a concrete block 4 is arranged at the bottom of the steel plate 3, the concrete block 4 is completely pricked in the soil, a bolt sleeve 5 is arranged on the steel plate 3, a threaded rod 6 is arranged inside the concrete block 4, the bolt sleeve 5 tightly presses the steel plate 3 to the concrete block 4, a cross brace beam 8 is fixed at the top of the main supporting column 1, a protective box 9 is arranged at the top of the cross brace beam 8, a mutual inductor combination device 17 is arranged in the protective box 9, the protective box 9 is used for protecting the mutual inductor combination device 17, and can reduce the corrosion of the mutual inductor combination device 17 caused by solar radiation rain and the like, thereby prolonging the service life.

Referring to fig. 1 and 2, the outer side of the steel plate 3 is covered with the protection pad 2, the protection pad 2 completely covers the surface of the steel plate 3, the protection pad 2 is made of rubber, and the protection pad 2 made of rubber can prevent a pedestrian from being collided and can also be insulated.

Referring to fig. 1 and 2, the mixed solidification block 4 is formed by solidifying concrete, the concrete has the characteristics of high compressive strength, good durability, wide strength grade range and the like, meanwhile, the raw materials are rich, the price is low, the production process is simple, the mixed solidification block can be used in a large amount, the steel plate 3 is completely coated on the surface of the mixed solidification block 4, the shaking of the device can be reduced, and the corrosion of the mixed solidification block 4 can also be reduced.

Referring to fig. 1 and 2, the bolt sleeve 5 and the threaded rod 6 are tightened in a threaded fit mode, the bottom of the threaded rod 6 is connected through the welding column 7, the bolt sleeve 5 and the threaded rod 6 are tightened in a threaded mode to facilitate disassembly and assembly, the steel plate 3 is completely pressed on the concrete block 4 through the bolt sleeve 5, and the threaded rod 6 connected through the welding column 7 is completely sunk in the concrete block 4 to enable the threaded rod 6 to be fixed more firmly.

Referring to fig. 1 and 3, a box door 11 is mounted on the protective box 9 through a hinge 10, a safety lock 13 is arranged on the box door 11, the box door 11 with the hinge 10 can be conveniently opened for maintenance, and the safety lock 13 can be arranged to prevent other people from opening the box door to reduce the danger.

Referring to fig. 1 and 3, an illuminating lamp 14 is installed at the top inside the protective box 9, an observation window 12 is arranged on the box door 11, and the observation window 12 and the illuminating lamp 14 can be used for conveniently observing the internal situation, reducing unnecessary opening and improving efficiency.

Referring to fig. 1 and 3, a ventilation fan 15 is arranged on a cross beam 8 at the bottom of the protective box 9, a ventilation grille 16 is arranged on the side of the protective box 9, and the ventilation fan 15 can be started to ventilate and radiate the inside of the protective box 9 to avoid damage caused by overhigh temperature through the arranged ventilation fan 15 and the ventilation grille 16.

The working principle of the scheme is as follows: when the device is used, firstly, concrete is poured into a soil pit dug in advance to form a mixed block 4, a threaded rod 6 welded by a welding column 7 is sunk into the mixed block 4 while the concrete is poured to enable the mixed block 4 to be solidified and fixed, so that the stability of the threaded rod 6 in the mixed block 4 can be enhanced, then a steel plate 3 fixed at the bottom of a main supporting column 1 is coated on the mixed block 4, then a bolt sleeve 5 is used for driving the steel plate 3 to be tightly tied on the threaded rod 6 to enable the steel plate 3 to be completely attached to the mixed block 4, and then a protective pad 2 is sleeved on the steel plate 3 to reduce the corrosion of the steel plate 3.

The protection box 9 can reduce the sunshine of the protection mutual inductor combination device 17, thereby avoiding the rainwater erosion to prolong the service life of the device, opening the box door 11 through the safety lock 13 for convenient maintenance, and moreover, the observation window 12 and the illuminating lamp 14 which are arranged can facilitate the working personnel not to open the box door 11 for observation and reduce unnecessary opening of the box door 11, and then the ventilation grille 16 is enabled to ventilate and radiate the protection box 9 by starting the ventilation fan 15.

Claims

1. A transformer neutral grounding device comprises a main support column (1), and is characterized in that: the bottom of main stay (1) is fixed with steel sheet (3), the bottom of steel sheet (3) is provided with mixes clot (4), be provided with bolt cover (5) on steel sheet (3), mix inside threaded rod (6) that is provided with of clot (4), the top of main stay (1) is fixed with spreader beam (8), the top of spreader beam (8) is provided with guard box (9), be provided with mutual-inductor composite set (17) in guard box (9).

2. A transformer neutral grounding arrangement as claimed in claim 1, wherein: the outside cladding of steel sheet (3) has protection pad (2), protection pad (2) are made by rubber materials.

3. A transformer neutral grounding arrangement as claimed in claim 1, wherein: the concrete block (4) is formed by solidifying concrete, and the steel plate (3) is completely coated on the surface of the concrete block (4).

4. A transformer neutral grounding arrangement as claimed in claim 1, wherein: the bolt sleeve (5) is screwed up with the threaded rod (6) in a threaded fit mode, and the bottom of the threaded rod (6) is connected through the welding column (7).

5. A transformer neutral grounding arrangement as claimed in claim 1, wherein: a box door (11) is installed on the protective box (9) through a hinge (10), and a safety lock (13) is arranged on the box door (11).

6. A transformer neutral grounding arrangement according to claim 5, wherein: an illuminating lamp (14) is installed at the top inside the protective box (9), and an observation window (12) is arranged on the box door (11).

7. A transformer neutral grounding arrangement as claimed in claim 1, wherein: a ventilating fan (15) is arranged on a cross supporting beam (8) at the bottom of the protective box (9), and a ventilating grille (16) is arranged on the side edge of the protective box (9).