CN215377202U

CN215377202U - Double-layer ultra-small radial coil pressing tool

Info

Publication number: CN215377202U
Application number: CN202121366908.6U
Authority: CN
Inventors: 赵义香; 聂伟; 严子红; 叶禄; 庄甲军
Original assignee: Shandong Power Equipment Co Ltd
Current assignee: Shandong Power Equipment Co Ltd
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2021-12-31
Anticipated expiration: 2031-06-18

Abstract

The utility model relates to a double-layer ultra-small radial coil pressing tool, which comprises: a pressing cushion block, an inner pressing ring and an outer pressing ring. The inner pressing ring is arranged on the electrostatic ring on the inner coil, the outer pressing ring is arranged on the electrostatic ring on the outer coil, the pressing cushion blocks are arranged on the inner pressing ring and the outer pressing ring, and the inner pressing ring and the outer pressing ring mainly enable the electrostatic ring to be stressed uniformly and prevent the electrostatic ring from cracking due to stress concentration. The one side that presses the cushion and press in and press dress circle and outer pressure dress circle to contact is provided with the U-shaped notch, the U-shaped notch be used for avoiding interior pressure dress circle and outer pressure dress circle between the hard fiber container, avoid the coil to press the dress in-process to damage the hard fiber container. The utility model can realize the effect that the inner coil and the outer coil are simultaneously pressed. The inner and outer coils are stressed equally and uniformly, so as to ensure the pressing effect and realize hot pressing or constant pressure. The hard paper tube is reasonably avoided, the electrostatic ring is effectively protected, and potential quality hazards of products in the coil pressing process are prevented.

Description

Double-layer ultra-small radial coil pressing tool

Technical Field

The utility model relates to a double-layer ultra-small radial coil pressing tool, which is used for pressing operation of ultra-small radial double-layer coils in alternating current transformers and converter transformers and belongs to the technical field of production and manufacturing of transformer coils.

Background

The transformer is provided with a double-layer ultra-small radial coil (consisting of an inner coil and an outer coil), the single-layer radial direction of the coils of the inner coil and the outer coil is only 10-15mm, namely the thickness of one wire, and a hard paper tube and an oil gap supporting strip are assembled between the inner coil and the outer coil. In the manufacturing process of the transformer coil, in order to ensure that the coil is sufficiently pressed when the coil is dried at a constant voltage, a larger external pressure needs to be applied to the coil. Due to the special structure of the double-layer ultra-small radial coil, the traditional press-fitting tool can often damage the hard paper tube and the oil gap supporting strips, so that the special tool needs to be specially designed for press-fitting operation of the double-layer ultra-small radial coil.

Disclosure of Invention

In order to solve the technical problem, the utility model provides a double-layer ultra-small radial coil pressing tool.

The technical scheme adopted by the utility model is as follows:

the utility model provides a frock is obeyed to double-deck super little radial coil pressure, includes: a pressing cushion block, an inner pressing ring and an outer pressing ring. The inner pressing ring is arranged on the electrostatic ring on the inner coil, the outer pressing ring is arranged on the electrostatic ring on the outer coil, the pressing cushion blocks are arranged on the inner pressing ring and the outer pressing ring, and the inner pressing ring and the outer pressing ring mainly enable the electrostatic ring to be stressed uniformly and prevent the electrostatic ring from cracking due to stress concentration. The one side that presses the dress cushion and interior pressure dress circle and outer pressure dress circle to contact be provided with the U-shaped notch, the U-shaped notch be used for avoiding interior pressure dress circle and outer pressure dress circle between the hard fiber container and the oil clearance stay, avoid the coil to press the dress in-process to damage hard fiber container and oil clearance stay.

The utility model has the beneficial effects that:

the utility model is applied to the double-layer ultra-small radial coil press clothes, and can realize the effect of simultaneously pressing the inner coil and the outer coil. The inner and outer coils are stressed equally and uniformly, so as to ensure the pressing effect and realize hot pressing or constant pressure. Simultaneously, rationally avoid hard fiber container and oil clearance stay to effectively protect the static ring, prevent that the coil from pressing the clothing in-process to make the product quality hidden danger appear, promote the security that the transformer produced.

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 should be apparent that the drawings in the following description are specific embodiments of the utility model, and that other drawings within the scope of the present application can be obtained by those skilled in the art without inventive effort.

FIG. 1 is an assembled cross-sectional view of a press-fit tool and a double-layer ultra-small radial coil according to an embodiment of the utility model;

FIG. 2 is a fully assembled cross-sectional view of a pressing operation of the press tooling of an embodiment of the present invention;

in the figure, 1 is a pressing cushion block, 2 is an inner pressing ring, 3 is an outer pressing ring, 4 is a through hole, 5 is an outer coil, 6 is an inner coil, 7 is a hard paper tube, 8 is an upper pressing plate, 9 is a pressing screw, 10 is a fastening nut, 11 is a phenolic wood block, and 12 is a lower pressing plate.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.

Fig. 1 is an assembled cross-sectional view of a press-fitting tool and a double-layer ultra-small radial coil according to an embodiment of the present invention. The electrostatic ring is not shown in the figure because of its small size. The utility model provides a frock is obeyed to double-deck super little radial coil pressure, includes: a pressing cushion block 1, an inner pressing ring 2 and an outer pressing ring 3. The one side that press cushion 1 and interior press collar 2 and outer press collar 3 contact be provided with the U-shaped notch, press cushion 1 is located pressure disk 8 and interior press collar 2 and outer press collar 3 between, will apply to the pressure transmission of last pressure disk 8 and realize the press and obey the operation on the double-deck super little radial coil.

The width of the pressure-absorbing cushion block 1 exceeds the radial direction of the double-layer ultra-small radial coil by 10mm, the height of the pressure-absorbing cushion block exceeds the coil head-out length by 50mm so as to avoid the coil head-out, and the thickness of the pressure-absorbing cushion block is not less than 30 mm. Because the hard paper tube and the oil clearance stay between the inner pressing ring 2 and the outer pressing ring 3 are slightly higher than the inner pressing ring 2 and the outer pressing ring 3, the slotting size of the U-shaped notch is determined according to the relative heights (namely the height difference) of the hard paper tube and the oil clearance stay with the inner pressing ring 2 and the outer pressing ring 3, and the hard paper tube and the oil clearance stay are prevented from being damaged by jacking during pressing. Because the weight of pressure clothes cushion block 1 is great to need to use a plurality of pressure clothes cushion blocks 1, the position that a plurality of pressure clothes cushion blocks 1 avoided the oil clearance stay is placed by grades, so, join in marriage on a plurality of adjacent sides of pressure clothes cushion block 1 and beat phi 10's through-hole 4, use phi 5's shrink tube to pass ligature pressure clothes cushion block 1 behind through-hole 4, damage cardboard section of thick bamboo and oil clearance stay when preventing pressure clothes cushion block 1 from dropping.

The inner and

outer pressure rings

2 and 3 are designed according to the size of the electrostatic rings on the inner and

outer coils

6 and 5, and the inner and outer diameters of the inner and

outer pressure rings

2 and 3 are 3mm larger than the inner and outer diameters of the electrostatic rings, namely the radial direction exceeds the radial direction of the electrostatic rings. The inner press ring 2 is placed on the inner coil 6, and the outer press ring 3 is placed on the outer coil 5. The inner pressing ring 2 and the outer pressing ring 3 mainly enable the pressure transmitted by the pressing cushion block 1 to be uniformly applied to the inner coil 6 and the outer coil 5, and prevent the electrostatic ring on the upper part of the double-layer ultra-small radial coil from being crushed and cracked due to nonuniform stress.

The materials of the inner pressing ring 2 and the outer pressing ring 3 can be selected according to actual needs, laminated wood, laminated paperboards or stainless steel materials can be selected, and the thickness of the laminated wood is not less than 20 mm. Because the double-layer ultra-small radial coil usually has a larger diameter, if the inner pressing ring 2 and the outer pressing ring 3 are integrally designed, larger economic cost and process difficulty can be brought, so the inner pressing ring 2 and the outer pressing ring 3 are designed into a split combined structure, the inner pressing ring 2 and the outer pressing ring 3 are preferably divided into four segments, and the corresponding grooves are designed at the split joints to realize butt joint. In order to avoid the double-layer ultra-small radial coil head, an opening is respectively arranged on the inner pressing ring 2 and the outer pressing ring 3, the opening is used for the coil head to pass through, and the size of the opening is determined according to the coil head outlet width. Can mill the spill notch on the one side that inner pressure ring 2 and outer pressure ring 3 and pressure cushion 1 contacted, the degree of depth 5mm of spill notch contacts through spill notch and pressure cushion 1 for pressure cushion 1 is more firm difficult for the landing in the pressure clothes operation process.

Fig. 2 is a sectional view showing the entire assembly of the press-fitting operation of the press-fitting tool according to the embodiment of the present invention. A ring of bakelite 11 is placed on the lower platen 12, the outer coil 5 and the inner coil 6 are placed on the bakelite 11, and the cardboard tube 7 and the oil gap stay are placed between the outer coil 5 and the inner coil 6 (the oil gap stay is not shown in the figure, and the electrostatic ring of the upper part of the outer coil 5 and the upper part of the inner coil 6 are also not shown in the figure). The inner pressing ring 2 is positioned on the inner coil 6, the outer pressing ring 3 is positioned on the outer coil 5, and the coil is avoided from going out through the openings on the inner pressing ring 2 and the outer pressing ring 3. The pressing cushion block 1 is positioned on the inner pressing ring 2 and the outer pressing ring 3, the side face of the U-shaped notch formed in the pressing cushion block 1 is in contact with the inner pressing ring 2 and the outer pressing ring 3, and the shrinkage pipe penetrates through the through hole 4 and then is bound with the pressing cushion block 1. The upper pressure plate 8 is positioned on the pressure clothes cushion block 1, and two ends of a pressure clothes screw rod 9 are screwed and fixed through a fastening nut 10 after respectively penetrating through the upper pressure plate 8 and the lower pressure plate 12. Pressure is applied to the upper pressure plate 8 through equipment such as a hydraulic cylinder, and the pressure is transmitted to the inner coil 6 and the outer coil 5 through the upper pressure plate 8, the pressing cushion block 1, the inner pressing ring 2 and the outer pressing ring 3 in sequence, so that the pressing operation of the double-layer ultra-small radial coil is completed.

Finally, it is to be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, and the scope of the present invention is not limited thereto. Those skilled in the art will understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein.

Claims

1. Double-deck super little radial coil pressure clothes frock, its characterized in that includes: the pressing cushion block (1), the inner pressing ring (2) and the outer pressing ring (3) are arranged, and a U-shaped notch is formed in one side, in contact with the inner pressing ring (2) and the outer pressing ring (3), of the pressing cushion block (1).

2. The double-layer ultra-small radial coil pressing tool according to claim 1, wherein the inner diameter and the outer diameter of the inner pressing ring (2) and the outer pressing ring (3) are 3mm larger than the inner diameter and the outer diameter of the electrostatic ring.

3. The double-layer ultra-small radial coil pressing tool according to claim 2, characterized in that the inner pressing ring (2) and the outer pressing ring (3) are made of laminated wood, laminated paperboard or stainless steel.

4. The double-layer ultra-small radial coil press-fitting tool according to claim 3, wherein the laminated wood has a thickness of not less than 20 mm.

5. The double-layer ultra-small radial coil pressing tool according to claim 1, characterized in that the inner pressing ring (2) and the outer pressing ring (3) are of a split combined structure.

6. The double-layer ultra-small radial coil pressing tool according to claim 5, characterized in that the inner pressing ring (2) and the outer pressing ring (3) are divided into four sections, and corresponding grooves are designed at the joint of the sections to realize butt joint.

7. The double-layer ultra-small radial coil pressing tool according to claim 1, characterized in that an opening is respectively arranged on the inner pressing ring (2) and the outer pressing ring (3), and concave notches are milled on the surfaces of the inner pressing ring (2) and the outer pressing ring (3) which are contacted with the pressing cushion blocks (1).

8. The double-layer ultra-small radial coil press-fitting tool according to claim 1, characterized in that the width of the press-fitting cushion block (1) exceeds the radial direction of the double-layer ultra-small radial coil by 10mm, the height of the press-fitting cushion block exceeds the coil head length by 50mm, and the thickness of the press-fitting cushion block is not less than 30 mm.

9. The double-layer ultra-small radial coil press-fitting tool according to claim 8, characterized in that through holes (4) are arranged on the press-fitting cushion blocks (1), and the press-fitting cushion blocks (1) are bound after a shrinkage pipe is used to penetrate through the through holes (4).

10. The double-layer ultra-small radial coil pressing tool according to any one of claims 1 to 9, characterized in that a bakelite block (11) is positioned on a lower pressing plate (12), an outer coil (5) and an inner coil (6) are positioned on the bakelite block (11), an inner pressing ring (2) is positioned on the inner coil (6), an outer pressing ring (3) is positioned on the outer coil (5), pressing blocks (1) are positioned on the inner pressing ring (2) and the outer pressing ring (3), an upper pressing plate (8) is positioned on the pressing blocks (1), and two ends of a pressing screw (9) respectively penetrate through the upper pressing plate (8) and the lower pressing plate (12) and are screwed and fixed through fastening nuts (10).