阅读说明：本技术 一种大型变压器腹板结构件防护结构及方法 (Protective structure and method for large transformer web structural part ) 是由 张海栓 张计英 高宁 柴晓博 王劲波 龙腾 徐爽 张永恒 张伟 鲁建玺 于 2021-07-23 设计创作，主要内容包括：本发明涉及一种大型变压器腹板结构件防护结构及方法,属于变压器制造设备技术领域。技术方案是：肢板(2)的端部与腹板(1)连接,肢板(2)通过绝缘螺杆(3)固定在压装垫块(4)上,压装垫块(4)设置在压板(5)上,压板(5)设置在高压线圈端部(11)。本发明的有益效果是：通过采用绝缘防护结构和改变安装方式,改变电场环境,增加爬电距离,避免局部放电的发生。(The invention relates to a large-scale transformer web structural member protection structure and a method, and belongs to the technical field of transformer manufacturing equipment. The technical scheme is as follows: the end part of the limb plate (2) is connected with the web plate (1), the limb plate (2) is fixed on a press-fitting cushion block (4) through an insulating screw rod (3), the press-fitting cushion block (4) is arranged on a press plate (5), and the press plate (5) is arranged at the end part (11) of the high-voltage coil. The invention has the beneficial effects that: through adopting insulating protective structure and change mounting means, change the electric field environment, increase creepage distance, avoid partial discharge's emergence.)

1. The utility model provides a large-scale transformer web structure protective structure which characterized in that: contain web (1), limb board (2), insulating screw rod (3), pressure equipment cushion (4) and clamp plate (5), the tip and the web (1) of limb board (2) are connected, and limb board (2) are fixed on pressure equipment cushion (4) through insulating screw rod (3), and pressure equipment cushion (4) set up on clamp plate (5), and clamp plate (5) set up in high-voltage coil tip (11).

2. The large transformer web structural member protection structure of claim 1, wherein: and reinforcing iron (10) is arranged at the joint of the web plate (1) and the limb plate (2).

3. The large transformer web structural member protection structure according to claim 1 or 2, wherein: and the limb plate (2) and the press-fitting cushion block (4) are respectively provided with a first threaded hole and a second threaded hole which are communicated with each other and are matched with external threads on the insulating screw (3), and the limb plate (2) and the press-fitting cushion block (4) are in threaded connection with the insulating screw (3) through the first threaded hole, the second threaded hole and the insulating screw.

4. The large transformer web structural member protection structure according to claim 3, wherein: the number of the first threaded holes, the number of the second threaded holes and the number of the insulating screw rods (3) are the same and are multiple.

5. A method for protecting a large transformer web structural member by using the protection structure defined in any one of claims 1 to 4, characterized by comprising the following steps: the end part of the limb plate (2) is connected with the web plate (1), the pressing plate (5) is placed at the end part (11) of the high-voltage coil, the press-fitting cushion block (4) is placed between the limb plate (2) and the pressing plate (5), and the limb plate (2) is fixedly connected with the press-fitting cushion block (4) through the insulating screw (3).

6. The utility model provides a large-scale transformer web structure protective structure which characterized in that: the lead fixing device comprises a web plate (1), a pressing plate (5), a lead clamp (6) for fixing a lead, a fixing plate (7), a bolt (8) and an insulating sheath (9), wherein the end part of the fixing plate (7) is connected with the web plate (1), the insulating sheath (9) is sleeved on the fixing plate (7), the lead clamp (6) for fixing the lead is arranged above the fixing plate (7), the fixing plate (7) is connected with the lead clamp (6) for fixing the lead through the bolt (8), the head part of the bolt (8) faces downwards, and the tail part of the bolt (8) faces upwards; the pressing plate (5) is arranged below the fixing plate (7), the pressing plate (5) is arranged at the end part (11) of the high-voltage coil, and the end part (11) of the high-voltage coil is connected with the head (12) of the high-voltage coil.

7. A method for protecting a large transformer web structure, which uses the protection structure defined in claim 6, and is characterized by comprising the following steps: connecting the end part of a fixing plate (7) with a web plate (1), sleeving an insulating sheath (9) on the fixing plate (7), then placing a lead clamp (6) for fixing a lead on the fixing plate (7) sleeved with the insulating sheath (9), penetrating the fixing plate (7) sleeved with the insulating sheath (9) and the lead clamp (6) for fixing the lead from the lower part of the fixing plate (7) sleeved with the insulating sheath (9) by using bolts, and fixing the lead clamp (6) for fixing the lead by using nuts; the end part (11) of the high-voltage coil is connected with the head (12) of the high-voltage coil, and the pressing plate (5) is placed at the end part (11) of the high-voltage coil and is positioned below the fixing plate (7).

Technical Field

The invention relates to a large-scale transformer web structural member protection structure and a method, and belongs to the technical field of transformer manufacturing equipment.

Background

The web plate and the structural member welded on the web plate have irreplaceable effects on press fitting of the transformer body and fixing of the lead wire clamp of the transformer. For the transformer with the high-voltage coil leading-out wire, the distance from the end part and the leading-out head of the high-voltage coil to a structural part arranged on the web plate is short, the electrical distance is not easily met, and partial discharge is easily generated.

Disclosure of Invention

The invention aims to provide a protective structure and a method for a large transformer web structural member, which can change the electric field environment, increase the creepage distance, avoid the occurrence of partial discharge and effectively solve the problems in the background art.

The technical scheme of the invention is as follows:

the utility model provides a large-scale transformer web structure protective structure, contains web, limb board, insulating screw rod, pressure equipment cushion and clamp plate, the tip and the web of limb board are connected, and limb board passes through insulating screw rod to be fixed on the pressure equipment cushion, and the pressure equipment cushion sets up on the clamp plate, and the clamp plate setting is at the high-voltage coil tip.

And reinforcing iron is arranged at the joint of the web plate and the limb plate.

And the limb plate and the press-fitting cushion block are respectively provided with a first threaded hole and a second threaded hole which are communicated and are matched with the external threads on the insulating screw rod, and the limb plate and the press-fitting cushion block are in threaded connection with the insulating screw rod through the first threaded hole, the second threaded hole and the insulating screw rod.

The number of the first threaded holes, the number of the second threaded holes and the number of the insulating screws are the same, and the number of the first threaded holes, the number of the second threaded holes and the number of the insulating screws are multiple.

A protection method for a large transformer web structural member adopts the protection structure and comprises the following steps: the end part of the limb plate is connected with the web plate, the pressing plate is placed at the end part of the high-voltage coil, the press-fitting cushion block is placed between the limb plate and the pressing plate, and the limb plate and the press-fitting cushion block are fixedly connected through the insulating screw.

The second technical scheme of the invention is as follows:

a large-scale transformer web structural part protective structure comprises a web, a pressing plate, a lead clamp for a fixed lead, a fixed plate, a bolt and an insulating sheath, wherein the end part of the fixed plate is connected with the web; and a pressing plate is arranged below the fixing plate and arranged at the end part of the high-voltage coil, and the end part of the high-voltage coil is connected with the head of the high-voltage coil.

A protection method for a large transformer web structural member adopts the protection structure and comprises the following steps: connecting the end part of a fixing plate with a web plate, sleeving an insulating sheath on the fixing plate, then placing a lead clamp for fixing a lead on the fixing plate sleeved with the insulating sheath, penetrating the fixing plate sleeved with the insulating sheath and the lead clamp for fixing the lead from the lower part of the fixing plate sleeved with the insulating sheath by using a bolt, and fixing the lead clamp for fixing the lead by using a nut; the end part of the high-voltage coil is connected with the head of the high-voltage coil, and the pressing plate is placed at the end part of the high-voltage coil and is positioned below the fixing plate.

The invention has the beneficial effects that: through adopting insulating protective structure and change mounting means, change the electric field environment, increase creepage distance, avoid partial discharge's emergence.

Drawings

FIG. 1 is a schematic structural view of a fixing and press-fitting cushion block for a limb plate at the end part of a high-voltage coil according to the invention;

FIG. 2 is a schematic view of the structure of the high-voltage coil of the present invention in which the lead is fixed at the head by a lead clip;

in the figure: the high-voltage coil comprises a web plate 1, a limb plate 2, an insulating screw 3, a press-fitting cushion block 4, a pressing plate 5, a lead clamp 6 for fixing a lead, a fixing plate 7, a bolt 8, an insulating sheath 9, a reinforcing iron 10, a high-voltage coil end part 11 and a high-voltage coil head 12.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and embodiments, which are preferred embodiments of the present invention. It is to be understood that the described embodiments are merely a subset of the embodiments of the invention, and not all embodiments; it should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. 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.

The technical scheme of the invention is as follows:

the utility model provides a large-scale transformer web structure protective structure, contains web 1, limb board 2, insulating screw rod 3, pressure equipment cushion 4 and clamp plate 5, the tip and the web 1 of limb board 2 are connected, and limb board 2 passes through insulating screw rod 3 to be fixed on pressure equipment cushion 4, and pressure equipment cushion 4 sets up on clamp plate 5, and clamp plate 5 sets up at high-voltage coil tip 11.

And a reinforcing iron 10 is arranged at the joint of the web plate 1 and the limb plate 2.

The limb plate 2 and the press-fitting cushion block 4 are respectively provided with a first threaded hole and a second threaded hole which are communicated with each other and are matched with the external threads on the insulating screw rod 3, and the limb plate 2 and the press-fitting cushion block 4 are in threaded connection with the insulating screw rod 3 through the first threaded hole, the second threaded hole and the insulating screw rod.

The number of the first threaded holes, the number of the second threaded holes and the number of the insulating screws 3 are the same and are multiple.

A protection method for a large transformer web structural member adopts the protection structure and comprises the following steps: the end part of the limb plate 2 is connected with the web plate 1, the pressing plate 5 is placed at the end part 11 of the high-voltage coil, the press-fitting cushion block 4 is placed between the limb plate 2 and the pressing plate 5, and the limb plate 2 and the press-fitting cushion block 4 are fixedly connected through the insulating screw rod 3.

The second technical scheme of the invention is as follows:

a large-scale transformer web structural part protective structure comprises a web 1, a pressure plate 5, a lead clamp 6 for a fixed lead, a fixed plate 7, a bolt 8 and an insulating sheath 9, wherein the end part of the fixed plate 7 is connected with the web 1, the insulating sheath 9 is sleeved on the fixed plate 7, the lead clamp 6 for the fixed lead is arranged above the fixed plate 7, the fixed plate 7 is connected with the lead clamp 6 for the fixed lead through the bolt 8, the head part of the bolt 8 faces downwards, and the tail part of the bolt 8 faces upwards; the pressing plate 5 is arranged below the fixing plate 7, the pressing plate 5 is arranged at the end part 11 of the high-voltage coil, and the end part 11 of the high-voltage coil is connected with the head 12 of the high-voltage coil.

A protection method for a large transformer web structural member adopts the protection structure and comprises the following steps: connecting the end part of a fixing plate 7 with a web plate 1, sleeving an insulating sheath 9 on the fixing plate 7, then placing a lead clamp 6 for fixing a lead on the fixing plate 7 sleeved with the insulating sheath 9, penetrating the fixing plate 7 sleeved with the insulating sheath 9 and the lead clamp 6 for fixing the lead from the lower part of the fixing plate 7 sleeved with the insulating sheath 9 by using bolts, and fixing the lead clamp 6 for fixing the lead by using nuts; the high-voltage coil end 11 is connected with the high-voltage coil head 12, and the pressing plate 5 is placed at the high-voltage coil end 11 and is positioned below the fixing plate 7.

In practical application, according to the technical scheme I, the limb plate 2 is fixed with the press-fitting cushion block 4 through the insulating screw rod 3. A first threaded hole and a second threaded hole are formed in the limb plate and the press-fitting cushion block 4, and an insulating screw rod is installed in the first threaded hole and the second threaded hole, so that sharp corners are avoided, the creepage distance from the end part of the high-voltage coil to a structural part is increased, and the occurrence of partial discharge can be effectively avoided.

Technical scheme two, increase insulating sheath 9 on fixed plate 7 of wire clamp 6 for the fixed lead wire, set up bolt 8's mounting means simultaneously for the head down, the afterbody is up.

Through these structures of increasing protection and changing the mounting mode, can change the electric field environment effectively, increase creepage distance, avoid partial discharge's emergence.