CN210925723U

CN210925723U - Transformer body pressing structure

Info

Publication number: CN210925723U
Application number: CN201922491659.2U
Authority: CN
Inventors: 郑原原; 王孝增; 刘章梁; 汤晨
Original assignee: Nanjing Liye Power Transformer Co ltd
Current assignee: Nanjing Liye Power Transformer Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-07-03
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a transformer body compression structure, which comprises a clamp web plate, a reinforcing rib, a flat plate, an insulating bolt, a compression cushion block and a transformer body, wherein the reinforcing rib and the flat plate are welded together, and the reinforcing rib and the flat plate are welded on the clamp web plate; the pressing cushion block is arranged between the flat plate and the transformer body, and the insulating bolt is used for positioning the pressing cushion block. The utility model discloses under the condition that does not increase product cost for the transformer ware body compact structure that the anti proruption short circuit ability of transformer greatly improved.

Description

Transformer body pressing structure

Technical Field

The utility model relates to a transformer manufacturing technology, especially a transformer ware body compact structure.

Background

With increasingly intense market competition of transformer products, the reliability requirement of the products is higher and higher in order to ensure the stable power consumption requirement of users at every moment. The sudden short circuit capability is an important performance parameter for measuring the transformer, and how to improve the sudden short circuit capability of the transformer is the problem which is mainly solved by the current manufacturers under the condition of not increasing the product cost. According to the traditional transformer body pressing structure, the upper end ring of the transformer body is pressed by the pressing nail, the pressing nail is small in size, the pressing contact area is small, and the pressing contact area influences the anti-burst short circuit capacity of the transformer. In order to change the defects of the traditional structure, the pressing plate pressing device is improved to increase the pressing area and improve the sudden short circuit resistance.

Disclosure of Invention

To the problem that exists among the prior art, the utility model provides a do not increase under the condition of product cost for the transformer ware body compact structure that the anti proruption short circuit ability of transformer greatly improved.

The purpose of the utility model is realized through the following technical scheme.

A transformer body compression structure comprises a clamp web plate, reinforcing ribs, a flat plate, insulating bolts, compression cushion blocks and a transformer body, wherein the reinforcing ribs and the flat plate are welded together, and the reinforcing ribs and the flat plate are welded on the clamp web plate; the pressing cushion block is arranged between the flat plate and the transformer body, and the insulating bolt is used for positioning the pressing cushion block.

The width of the pressing cushion block is 120mm, and the thickness of the pressing cushion block is 80 mm.

The width of the flat plate is 100mm, and the thickness of the flat plate is 20 mm.

Compared with the prior art, the utility model has the advantages of: this novel ware body compact structure adopts above structure, and this part strengthening rib and flat plate weld into a holistic design, increase the welding seam area, under the condition of same atress, bigger welding area, the stress that bears just also is big more, has just also played the effect that strengthens structural strength. The design of the flat plate and the pressing cushion block of the component has the advantages that under the same stress action, the larger the area of a pressing surface is, the larger the pressing area is, the smaller the pressure intensity in unit area is, the effect of dispersing stress is achieved, and the sudden short circuit resistance of the pressing structure of the transformer body is further improved. The design of this part insulating bolt has played and has prevented to compress tightly the free effect of cushion, and the transformer normally will carry out remote transportation, and the mechanical strength of transformer is tested very much in the transportation link, so will ensure that each part has reliable fixed, as long as have "opening the discrepancy" of a widget, be enough to cause great accident.

Drawings

Fig. 1 is a schematic view of a conventional compression structure of a compression nail structure.

In the figure, 1, a clamping piece web; 2. reinforcing ribs; 3. pressing the nail nut; 4. pressing nails; 5. pressing a nail bowl; and 6, a body.

Fig. 2 is a schematic structural view of the pressing plate pressing device body of the present invention.

In the figure, 7, a clamping piece web; 8. reinforcing ribs; 9. a flat plate; 10. pressing the cushion block; 11. an insulating bolt; 12, a body.

Detailed Description

The invention is described in detail below with reference to the drawings and specific examples.

As shown in fig. 1, the conventional clinch structure: the reinforcing rib 2 is welded on the web plate 1 of the clamping piece, the front end of the reinforcing rib 2 is welded with the pressing nail nut 3, the pressing nail 4 and the pressing nail nut 3 are connected through threads, the pressing nail 4 tightly pushes the pressing nail bowl 5, and the pressing nail bowl 5 tightly presses the pressing body 6.

In the traditional nail pressing structure, the welding seam area between the clamping piece web 1 and the reinforcing rib 2 is small, and the borne stress is small; the 70mm round steel pressing nail 4 is small in size, the area of a pressing surface in contact with a pressing nail bowl 5 with the diameter phi of 100mm and the thickness of 50mm is small, and stress is concentrated; the structure of the nail pressing bowl 5 has no fully utilized space, the compact area is small, and the force distribution on the device body is uneven. The method is expected to be suitable for the sudden short circuit experiment of the power grid in the country with more and more strict requirements. The strength of the body 6 is increased again, the cost is increased, and the competitiveness of the enterprise is reduced.

As shown in fig. 2, in the improved novel structure, the reinforcing ribs 8 and the flat plate 9 are welded together to form the main part of the compression structure, and the reinforcing ribs and the flat plate are welded on the web 7 of the clamping piece, so that the traditional compression nail structure increases the welding area of the flat plate 9 and improves the stress bearing capacity; the 120mm wide and 80mm thick compression cushion block 10 is arranged between the 100mm wide and 20mm thick flat plate 9 and the transformer body 12, the radial space of the transformer is fully utilized, the compression surface area and the compression area are increased, the force applied to the transformer body 12 is distributed uniformly, the pressure intensity in unit area is reduced, and the capability of the transformer in resisting a sudden short circuit experiment is improved. The insulating bolt 11 is used for positioning the pressing cushion block 10, and the reliability of the pressing cushion block 10 in the transformer is guaranteed. Under the same condition, the improved novel structure can bear larger sudden short-circuit force than the original structure.

(1) The supporting surface structure of the original device body pressing structure is optimally designed, the pressing nail nut and the reinforcing rib are changed into a flat plate and the reinforcing rib, the welding area is increased, and the integral strength of the structure is improved; (2) by changing a 70mm round steel pressing nail into a flat plate with the width of 100mm and the thickness of 20mm, the area of a pressing surface is increased, and the stress of the body is uniformly distributed; (3) the pressing nail bowl with the diameter phi of 100mm and the thickness of 50mm is adjusted to be a pressing cushion block with the width of 120mm and the thickness of 80mm, the pressing area is adjusted to be a rectangle below a flat plate from a circular range below the pressing nail, the amplitude-phase space of the transformer is fully utilized, the rectangular pressing area below the flat plate is increased, the stress concentration of the transformer body is reduced, and the capacity of resisting sudden short circuit is improved.

Claims

1. A transformer body compression structure is characterized by comprising a clamping piece web plate, a reinforcing rib, a flat plate, an insulating bolt, a compression cushion block and a transformer body, wherein the reinforcing rib and the flat plate are welded together, and the reinforcing rib and the flat plate are welded on the clamping piece web plate; the pressing cushion block is arranged between the flat plate and the transformer body, and the insulating bolt is used for positioning the pressing cushion block.

2. The transformer body pressing structure according to claim 1, wherein the pressing pad block is 120mm wide and 80mm thick.

3. The transformer body pressing structure according to claim 1, wherein the plate has a width of 100mm and a thickness of 20 mm.