CN214336497U

CN214336497U - Insulating structure for transformer pad foot

Info

Publication number: CN214336497U
Application number: CN202120245996.8U
Authority: CN
Inventors: 郭井申; 刘艳丽; 杨丹丹; 孙海燕; 杨志新
Original assignee: Shanghai Electric Group Zhangjiagang Transformer Co Ltd
Current assignee: Shanghai Electric Group Zhangjiagang Transformer Co Ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-10-01
Anticipated expiration: 2031-01-28

Abstract

The utility model provides a transformer pad foot insulation system, is including filling up foot, bottom of the case board, folder channel-section steel, location nail down, and location nail welded fastening just is located one side of folder channel-section steel down on the bottom of the case board, and the bottom of folder channel-section steel fixed connection that an insulating sheath and insulating sheath have been cup jointed to the outside of location nail, fills up the foot and sets up and has offered a fixing hole in the position department that the location nail corresponds with folder channel-section steel down for integrated into one piece, fills up the foot and wears to establish the mode through fixing hole with the location nail and fixes the setting on the bottom of the case board. The utility model provides a pair of transformer pad foot insulation system, insulation system and pad foot, the connection between the bottom of the case board reliably do not drop, and it is insulating fully reliable, can stand long-distance transport's impact and do not damage.

Description

Insulating structure for transformer pad foot

Technical Field

The utility model relates to a transformer technical field, concretely relates to an insulation system that is used for power transformer, special transformer to fill up on foot.

Background

With the development and progress of the society, the application of the intelligent technology in the operation, monitoring, fault diagnosis and analysis and the like of the transformer is more and more extensive, the hidden defects of the transformer in operation are discovered earlier, the fault point and the fault type are judged in time, effective measures are taken to avoid the fault expansion, and the safety and the reliability of power utilization are ensured. To realize the above functions, the transformer in operation must monitor the core ground current and the clip ground current in real time. In order to monitor the grounding current of the iron core and the clamping piece of the transformer in operation, higher requirements are put on the grounding structure of the transformer, namely, the iron core grounding system, the clamping piece grounding system and the oil tank grounding system are required to be mutually insulated.

One of the common positioning modes of the transformer body is a 'pad pin-positioning pin' structure, the pad pin of the iron core lower clamping piece is matched and positioned with the positioning pin welded on the bottom of the box, the clamping piece and the oil tank form an equipotential structure to form a passage, namely, a clamping piece grounding system and an oil tank grounding system are in a passage state (non-insulation), and the requirement of monitoring the grounding current of the clamping piece in real time cannot be met. In order to solve the problem, insulation paper can be wound on the positioning nails to ensure insulation, but when the transformer body falls into a tank, the insulating paper wound on the transformer body can be easily damaged by the foot pads, so that a channel or temporary insulation is caused, and the situation that the clamp passes through the channel of the oil tank still occurs after the transformer body is transported to the site over a long distance.

Disclosure of Invention

In view of this, the utility model aims at providing a transformer pad foot insulation system, insulation system and pad foot, the connection between the bottom plate of the case reliably does not drop, and is insulating fully reliable, can stand the impact of long-distance transport and not damage.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

the utility model provides a transformer pad foot insulation system, is including filling up foot, bottom of the case board, folder channel-section steel, location nail down, location nail welded fastening is in just be located on the bottom of the case board one side of folder channel-section steel down, an insulating sheath has been cup jointed just to the outside of location nail the bottom of insulating sheath with bottom of the case board fixed connection, fill up the foot with the folder channel-section steel sets up just as integrated into one piece down a fixing hole has been seted up to the position department that the location nail corresponds, fill up the foot with the location nail is worn to establish through fixing hole's mode is fixed to be set up on the bottom of the case board.

Preferably, an insulating plate is further clamped between the pad foot and the box bottom plate, a through hole is formed in the insulating plate at a position corresponding to the positioning nail, and the insulating plate and the pad foot are sequentially stacked on the box bottom plate in a manner that the through hole, the fixing through hole and the positioning nail are concentrically arranged.

Preferably, the aperture of the fixing through hole is equal to the sum of the diameter of the positioning nail and the thickness of the insulating sheath, that is, the insulating sheath on the positioning nail is attached to the side wall of the fixing through hole.

Preferably, the aperture of the through hole is larger than or equal to that of the fixing through hole, and the insulating sheath on the positioning nail is attached to the side wall of the through hole or has a gap.

Preferably, the top of the positioning nail is concavely provided with a threaded blind hole, the top of the insulating sheath is provided with a connecting through hole corresponding to the threaded blind hole, and the insulating sheath is penetrated through the connecting through hole through a bolt and is in threaded connection with the threaded blind hole at the top of the positioning nail so as to be fixed with the positioning nail.

Compared with the prior art, the utility model provides a pair of transformer pad foot insulation system has following advantage:

1. The insulating structure of the foot pad has simple structure, good manufacturability and convenient installation;

2. the insulating structure has high integral strength and can withstand the impact of long-distance transportation without being damaged;

3. the connection between the insulation structure and the foot pad and the box bottom plate is reliable and does not fall off, the insulation is sufficient and reliable, and the on-site core hanging inspection treatment caused by improper insulation is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a front view of an insulation structure of a transformer pad provided by the present invention;

fig. 2 is a side view of the transformer foot pad insulation structure provided by the present invention.

Reference numerals and component parts description referred to in the drawings:

1. a lower clamp piece channel steel; 2. a foot pad; 3. a bolt; 4. an insulating sheath; 5. positioning nails; 6. an insulating plate; 7. a box bottom plate; 8. a fixing through hole; 9. and penetrates through the through hole.

Detailed Description

The technical solution of the present invention will be described clearly and completely through the following detailed description. It is to be understood that the embodiments described are only some embodiments of the invention, and 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 belong to the protection scope of the present invention.

Referring to fig. 1-2, the transformer foot pad insulation structure comprises a foot pad 2, a box bottom plate 7, a lower clamp channel steel 1 and a positioning nail 5, wherein the positioning nail 5 is welded and fixed on the box bottom plate 7 and is arranged on one side of the lower clamp channel steel 1. Different from the prior art, the insulation structure in the embodiment adopts the mode that the insulation sheath 4 is sleeved outside the positioning nail 5, and the bottom of the insulation sheath 4 is fixedly connected with the box bottom plate 7.

Wherein, in order to further ensure that the outside insulating sheath 4 of location nail 5 can keep firmly cup jointing with location nail 5, the concave screw thread blind hole (not shown in the figure) of establishing in the top of location nail 5 of this, correspond the screw thread blind hole at the top of insulating sheath 4 and seted up a connect the via hole (not shown in the figure), so that insulating sheath 4 accessible bolt 3 wears to establish through connect the via hole and with the screw thread blind hole threaded connection at location nail 5 top with fix with location nail 5, thereby can guarantee to avoid taking place the condition that drops because of receiving the impact in the transportation.

The foot pad 2 and the lower clamp piece channel steel 1 are integrally formed and fixedly arranged on the box bottom plate 7. Meanwhile, an insulating plate 6 is additionally arranged between the foot pad 2 and the box bottom plate 7. In order to facilitate installation, a fixing through hole 8 and a through hole 9 are respectively formed in the positions, corresponding to the positioning nails 5, of the pad feet 2 and the insulating plate 6, and the insulating plate 6 and the pad feet 2 are sequentially stacked on the box bottom plate 7 in a mode that the through holes 9, the fixing through holes 8 and the positioning nails 5 are concentrically arranged. Meanwhile, the aperture of the fixing through hole 8 is equal to the sum of the diameter of the positioning nail 5 and the thickness of the insulating sheath 4, namely, the insulating sheath 4 on the positioning nail 5 is attached to the side wall of the fixing through hole 8. Because of insulation board 6 only need ensure to keep insulating state between backing block 2 and the bottom of the case board 7 can, consequently the aperture setting that runs through-hole 9 can be the aperture of more than or equal to fixed through-hole 8, insulating sheath 4 on the staple 5 promptly and the lateral wall laminating that runs through-hole 9 or have the clearance all can.

After the insulating structure is integrally installed, the pad feet 2 and the lower clamp piece channel steel 1 are in a passage state, the positioning nails 5 and the box bottom plate 7 are in a passage state, namely, the lower clamp piece channel steel 1 and the box bottom plate 7 (which can be understood as an oil tank) are in an insulating state, and the requirement that the clamp piece grounding system and the oil tank grounding system are mutually insulated is met. In the implementation, the insulating sheath 4 is made of phenolic glass cloth rods, has high strength and can withstand the impact of the transformer body when the transformer body falls into the box without being damaged. Meanwhile, the insulating sheath 4 and the positioning nail 5 are connected through the bolt 3, so that the connection reliability can be fully ensured.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a transformer pad foot insulation system which characterized in that: including filling up foot, bottom plate, lower folder channel-section steel, location nail welded fastening is in just be located on the bottom plate one side of folder channel-section steel down, an insulating sheath has been cup jointed just to the outside of location nail insulation sheath's bottom with bottom plate fixed connection, fill up the foot with folder channel-section steel sets up just for integrated into one piece down a fixing hole has been seted up to the position department that the location nail corresponds, fill up the foot with the location nail is worn to establish through fixing hole's mode is fixed to be set up on the bottom plate.

2. The transformer foot insulating structure according to claim 1, characterized in that: an insulating plate is further clamped between the pad feet and the box bottom plate, a through hole is formed in the position, corresponding to the positioning nail, of the insulating plate, and the insulating plate and the pad feet are sequentially stacked and arranged on the box bottom plate in a mode that the through hole, the fixing through hole and the positioning nail are concentrically arranged.

3. The transformer foot insulating structure according to claim 2, characterized in that: the aperture of the fixing through hole is equal to the sum of the diameter of the positioning nail and the thickness of the insulating sheath, namely the insulating sheath on the positioning nail is attached to the side wall of the fixing through hole.

4. The transformer foot insulating structure according to claim 3, characterized in that: the aperture of the through hole is larger than or equal to that of the fixing through hole, and the insulating sheath on the positioning nail is attached to the side wall of the through hole or has a gap.

5. The transformer foot pad insulation structure according to any one of claims 1 to 4, characterized in that: the top of the positioning nail is concavely provided with a threaded blind hole, the top of the insulating sheath is provided with a connecting through hole corresponding to the threaded blind hole, and the insulating sheath is penetrated through the connecting through hole through a bolt and is in threaded connection with the threaded blind hole at the top of the positioning nail so as to be fixed with the positioning nail.