CN202871528U

CN202871528U - Cushion block for epoxy resin pouring dry type transformer

Info

Publication number: CN202871528U
Application number: CN 201220558762
Authority: CN
Inventors: 解展望
Original assignee: CHANGSHU CITY SENYUAN ELECTRICAL TECHNOLOGY CO LTD
Current assignee: CHANGSHU CITY SENYUAN ELECTRICAL TECHNOLOGY CO LTD
Priority date: 2012-10-29
Filing date: 2012-10-29
Publication date: 2013-04-10
Anticipated expiration: 2022-10-29

Abstract

The utility model provides a cushion block for an epoxy resin pouring dry type transformer and belongs to the dry type transformer technical field. The epoxy resin pouring dry type transformer comprises an iron core, a low-voltage coil, a high-voltage coil, clamping pieces, cushion blocks and a tension screw rod, wherein a main channel is formed between the high-voltage coil and the low-voltage coil, cushion blocks are arranged on the upper end of the main channel and the lower end of the main channel, clamping pieces are arranged on the upper portion of an upper cushion block of a pair of the cushion blocks and the lower portion of a lower cushion of the pair of the cushion blocks, and the tension screw rod is connected between a pair of the clamping pieces. The cushion block for the epoxy resin pouring dry type transformer is characterized in that the cushion blocks comprises a first pad, a pressing block and a second pad, the pressing block is placed between the first pad and the second pad and forms an embedded connection with the first pad and the second pad, a notch is formed in one lateral face of the compressing block and the lateral face of the compressing block is close to the iron core, and a boss for embedding into the main channel is formed on one lateral face of the second pad and the lateral face of the second pad is close to the low-voltage coil and the high-voltage coil. The cushion block for the epoxy resin pouring dry type transformer has the advantages that structure is simple, manufacturing cost is lowered, electric insulativity of the transformer can be guaranteed, and fastening effect can be ensured.

Description

The Cast Resin Dry-Type Transformer cushion block

Technical field

The utility model belongs to the Dry-Transformer Technology field, is specifically related to a kind of cushion block of using on the low capacity Cast Resin Dry-Type Transformer of being applicable to

Background technology

The cushion block of transformer is the parts that support with the stationary transformer high-voltage coil and low-voltage coil, and cushion block generally has a pair of, is divided into cushion block and lower cushion block, usually is comprised of poured with epoxy resin spare and silicon rubber formed.Upper and lower cushion block comes fastening high and low pressure coil by the upper and lower folder application of force.Conventional Cast Resin Dry-Type Transformer, its coil fastening generally is to compress upper cushion block coil is not occured up and down and the movement of front and back position in the transportation of transformer and running by being fixed in pressure nail on the upper clamping piece, and assurance coil and iron core and securing member become one.In such project organization, press to be generally between nail and the upper cushion block to contact, when pressing the downward application of force of nail, upper cushion block unbalance stress, easily damage.Especially, for the small and light small capacity transformer of some iron cores, owing to be subjected to the restriction of small product size, this design of pressure nail and upper cushion block combination also can increase the complexity of product global design, makes troubles to manufacturing.

In view of above-mentioned prior art, the applicant has done actively and effectively to attempt, and technical scheme described below produces under such background

Summary of the invention

The purpose of this utility model be to provide a kind of simple in structure, with low cost, need not to cooperate, can be used for separately the fastening and fastening effective Cast Resin Dry-Type Transformer cushion block of coil with pressing nail.

The purpose of this utility model reaches like this, a kind of Cast Resin Dry-Type Transformer cushion block, described Cast Resin Dry-Type Transformer comprises iron core, the low-voltage coil of winding on iron core, winding is at the high-tension coil of low-voltage coil periphery, folder, cushion block and draw screw rod, between low-voltage coil and high-tension coil, be formed with the main channel, upper in the main channel short transverse, the lower end is respectively arranged with cushion block, in a pair of cushion block wherein go up cushion block above and lower cushion block below be respectively arranged with folder, the described screw rod that draws is connected between a pair of folder, be used for straining a pair of folder and compressing a pair of cushion block, be characterized in: described cushion block comprises the first liner, briquetting and the second liner, described briquetting is positioned at the centre of the first liner and the second liner, and with embedded connection of formation between the first liner and the second liner, be formed with breach at briquetting near the face of iron core one side, at the second liner towards low-voltage coil, be formed with the boss that goes for being embedded into the main channel on the face of high-tension coil one side.

In a specific embodiment of the present utility model, described the first liner is formed with at least one first projection at the face towards briquetting one side, correspondingly, described briquetting is formed with at least one for cooperatively interacting with described the first projection and realizing embedded the first blind hole that is connected at the face towards the first liner one side; Described the second liner is formed with at least one second projection at the face towards briquetting one side, correspondingly, described briquetting is formed with at least one for cooperatively interacting with described the second projection and realizing embedded the second blind hole that is connected at the face towards the second liner one side.

In another specific embodiment of the present utility model, described the first liner, the second liner all adopt silica gel molded and shaped, and the first projection on it, the second projection and boss are integrally formed during with the first liner, the second liner moulding.

In another specific embodiment of the present utility model, described briquetting adopts epoxy resin, silica flour and glass fiber molded and shaped, and the breach on it, the first blind hole, the second blind hole are integrally formed during with compound stalk forming.

In another specific embodiment of the present utility model, on the contact-making surface that contacts each other, also bond by insulating cement between described the first liner and the described briquetting and between described briquetting and described the second liner.

Also have in the specific embodiment of the present utility model, the cross sectional shape of described breach is L shaped.

In of the present utility model and then specific embodiment, structure is tight fit between described boss and the described main channel.

Cushion block described in the utility model can be simultaneously as upper cushion block and the lower cushion block of transformer, and upper and lower cushion block adopts identical Mould Machining moulding, and is not only simple in structure, and can effectively reduce production costs; On as transformer in the situation of cushion block, the folder on the first liner and top fits, the second liner is with high, the upper surface of low-voltage coil fits, in the situation as lower cushion block, the folder of the first liner and bottom fits, the second liner is with high, the lower surface of low-voltage coil fits, when a pair of folder of transformer when drawing the screw rod tension, boss on the second liner of a pair of cushion block snaps in respectively height, in the main channel between the low-voltage coil, and draw tighter that screw rod draws, it is darker that boss embeds the main channel, on radial, can effectively limit height, the distance of low-voltage coil, guarantee the electric insulating quality of transformer, in the axial direction by with the folder contact-making surface on the first liner can make a pair of cushion block stressed evenly, guarantee fastening effect.

Description of drawings

Fig. 1 is an application examples half sectional view of the present utility model.

Fig. 2 is the half sectional view of an embodiment of cushion block described in the utility model.

Among the figure: 1. folder; 2. cushion block, 21. first liners, 211. first projections, 22. briquettings, 221. breach, 222. first blind holes, 223. second blind holes, 23. second liners, 231. boss, 232. second projections; 3. low-voltage coil; 4. high-tension coil; 5. main channel; 6. draw screw rod; 7. iron core.

Embodiment

In order to make the public can fully understand technical spirit of the present utility model and beneficial effect; the applicant will describe in detail embodiment of the present utility model below by reference to the accompanying drawings; but the applicant is not restriction to technical scheme to the description of embodiment, anyly makes form and immaterial variation all should be considered as protection range of the present utility model according to the utility model design.

See also Fig. 1 and Fig. 2, a kind of Cast Resin Dry-Type Transformer cushion block, described Cast Resin Dry-Type Transformer comprises iron core 7, the low-voltage coil 3 of winding on iron core 7, winding is at the high-tension coil 4 of low-voltage coil 3 peripheries, folder 1, cushion block 2 and draw screw rod 6, between low-voltage coil 3 and high-tension coil 4, be formed with main channel 5,5 short transverses is upper in the main channel, the lower end is respectively arranged with cushion block 2, in a pair of cushion block 2 wherein go up cushion block above and lower cushion block below be respectively arranged with folder 1, the described screw rod 6 that draws is connected between a pair of folder 1, is used for straining a pair of folder 1 and compressing a pair of cushion block 2.Described cushion block 2 comprises the first liner 21, briquetting 22 and the second liner 23.The material of described briquetting 22 is unrestricted, in the present embodiment, be preferably resin material, particularly adopt epoxy resin, silica flour and glass fiber are molded and shaped after the heating pressurization, breach 221 on it, the first blind hole 222, the second blind hole 223 is integrally formed during with compound stalk forming, described breach 221 is positioned at briquetting 22 near on the face of iron core 1 one sides, its cross sectional shape is unrestricted, be preferably in the present embodiment L shaped, L shaped breach is in order to avoid the iron core corner angle and don't to change whole cushion block position and design, and the size of breach 222 depends on the size of iron core corner angle and the installation site of cushion block; Described the first blind hole 222 is opened on the face of the first liner 21 1 sides, and the quantity of the first blind hole 222 is unrestricted, can be more than one and one, has only illustrated in the present embodiment one; Described the second blind hole 223 is opened on the face of the second liner 23 1 sides, and the quantity of the second blind hole 223 is unrestricted, can be more than one and one equally, has only illustrated in the present embodiment one.Described the first liner 21, the second liner 23 all adopt silica gel molded and shaped, the first projection 211 on it, the second projection 232 and boss 231 are integrally formed during with the first liner 21,23 moulding of the second liner, the quantity of the first projection 211, the second projection 232 is unrestricted, can be more than one and one equally, only illustrate in the present embodiment one.When mounted, described the first projection 211 embeds in described the first blind hole 222, described the second projection 232 embeds in described the second blind hole 223, make and consist of embedded the connection between described briquetting 22 and the first liner 21 and the second liner 23, simultaneously, in order to increase the firmness that connects between the three, on the contact-making surface that contacts each other, also bond by insulating cement between described the first liner 21 and the described briquetting 22 and between described briquetting 22 and described the second liner 23.In addition, in order to guarantee that structure is tight fit between boss 231 and the main channel 5, the width of described boss 231 should be a bit larger tham the width of described main channel 5.

Please continue to consult Fig. 1, the utility model in actual applications, in the situation as the cushion block 2 on transformer top, the first liner 21 fits with the folder 1 on top, the second liner 23 and high-tension coil 4, the upper surface of low-voltage coil 3 short transverses fits, in the situation as the cushion block 2 of bottom, the first liner 21 is fitted with the folder 1 of bottom, the second liner 23 and high-tension coil 4, the lower surface of low-voltage coil 3 short transverses fits, on a pair of, lower clamping piece 1 is when drawing screw rod 6 tension, corresponding boss 231 snaps in the main channel 5 between low-voltage coil 3 and the high-tension coil 4 on the second liner 23 of a pair of cushion block 2, can effectively limit like this distance of high-voltage coil and low-voltage coil on radial, guarantee the electric insulating quality of transformer, can make every cushion block 2 stressed even by the first liner 21 in the axial direction.

In sum, the technical scheme that the utility model provides has overcome the shortcoming in the prior art, has reached goal of the invention, has embodied the described technique effect of applicant

Claims

1. A kind of Cast Resin Dry-Type Transformer cushion block, described Cast Resin Dry-Type Transformer comprises iron core (7), the low-voltage coil (3) of winding on iron core (7), winding is at the high-tension coil (4) of low-voltage coil (3) periphery, folder (1), cushion block (2) and draw screw rod (6), between low-voltage coil (3) and high-tension coil (4), be formed with main channel (5), (5) short transverse is upper in the main channel, the lower end is respectively arranged with cushion block (2), the top of wherein going up cushion block in a pair of cushion block (2) and the below of lower cushion block are respectively arranged with folder (1), the described screw rod (6) that draws is connected between a pair of folder (1), be used for straining a pair of folder (1) and compressing a pair of cushion block (2), it is characterized in that: described cushion block (2) comprises the first liner (21), briquetting (22) and the second liner (23), described briquetting (22) is positioned at the centre of the first liner (21) and the second liner (23), and with embedded connection of formation between the first liner (21) and the second liner (23), be formed with breach (221) at briquetting (22) near the face of iron core (7) one sides, at the second liner (23) towards low-voltage coil (3), be formed with the boss (231) that goes main channel (5) for being embedded on the face of high-tension coil (4) one sides.

2. Cast Resin Dry-Type Transformer cushion block according to claim 1, it is characterized in that described the first liner (21) is formed with at least one first projection (211) at the face towards briquetting (22) one sides, correspondingly, described briquetting (22) is formed with at least one for cooperatively interacting with described the first projection (211) and realizing embedded the first blind hole (222) that is connected at the face towards the first liner (21) one sides; Described the second liner (23) is formed with at least one second projection (232) at the face towards briquetting (22) one sides, correspondingly, described briquetting (22) is formed with at least one for cooperatively interacting with described the second projection (232) and realizing embedded the second blind hole (223) that is connected at the face towards the second liner (23) one sides.

3. Cast Resin Dry-Type Transformer cushion block according to claim 1 and 2, it is characterized in that described the first liner (21), the second liner (23) all adopt silica gel molded and shaped, the first projection (211) on it, the second projection (232) and boss (231) are integrally formed during with the first liner (21), the second liner (23) moulding.

4. Cast Resin Dry-Type Transformer cushion block according to claim 1 and 2, it is characterized in that described briquetting (22) adopts epoxy resin, silica flour and glass fiber molded and shaped, the breach on it (221), the first blind hole (222), the second blind hole (223) are integrally formed during with compound stalk forming.

5. Cast Resin Dry-Type Transformer cushion block according to claim 1, it is characterized in that between described the first liner (21) and the described briquetting (22) and described briquetting (22) and described the second liner (23) between on the contact-making surface that contacts each other, also bond by insulating cement.

6. Cast Resin Dry-Type Transformer cushion block according to claim 1, the cross sectional shape that it is characterized in that described breach (221) is L shaped.

7. Cast Resin Dry-Type Transformer cushion block according to claim 1 is characterized in that structure is tight fit between described boss (231) and described main channel (5)