CN206148234U

CN206148234U - Dry -type transformer's insulation system

Info

Publication number: CN206148234U
Application number: CN201621107327.XU
Authority: CN
Inventors: 徐健
Original assignee: JIANGSU HUACHEN TRANSFORMER Co Ltd
Current assignee: Jiangsu Huachen transformer Limited by Share Ltd
Priority date: 2016-10-09
Filing date: 2016-10-09
Publication date: 2017-05-03
Anticipated expiration: 2026-10-09

Abstract

The utility model discloses a dry -type transformer's insulation system, hold assembly are in the past, the rear side grasps the iron core, in the upper and lower both ends of arm -tie cooperate the location web that the embedding was gone up, one side of the neighbouring iron core of lower clamping part spare sets up on the surface respectively, will go up, lower clamping part spare links together, be equipped with the insulation board between hold assembly and the iron core, it has many parallel arrangement's insulation pad strip from top to bottom to bond between insulation board and the iron core, be equipped with the arm -tie insulator between arm -tie and the iron core. The utility model discloses at one side welding position web of hold assembly near the iron core, make on the one hand and draws the connected mode of pulling simple, do not need fasteners such as bolt, weight has been alleviateed and overall structure safe and reliable can be guaranteed, on the other hand has increased the insulation distance between hold assembly medial surface and the iron core, and creepage distance greatly increased has improved the insulation resistance of iron core to the folder, has reduced the degree of drying of insulating parts and the humidity requirement of air, and is stronger to the adaptability of environment.

Description

The insulation system of dry-type transformer

Technical field

This utility model is related to a kind of insulation system, specifically a kind of insulation system of dry-type transformer, belongs to and electrically sets It is standby.

Background technology

Dry-type transformer is the transformator cooled down by cross-ventilation, and in structure transformer core is both as transformation The skeleton of device coil, constitutes the passage of transformer magnetic circuit again, and it is formed by different in width stalloy stack, then by folder from top to bottom Clamping, forms the entirety of iron core；Upper clamping piece links together with lower clamping piece, during ensureing that iron core is lifted by crane, upper clamping piece and lower clamping piece And iron core will not disconnect.When dry-type transformer runs, its service life is heavily dependent on Transformer Winding insulation peace Full reliability, and the insulation system of current dry-type transformer simply simply adds one layer between folder, arm-tie and iron core Insulating trip, iron core is very low to the insulation resistance of folder, only several megaohms, degree of drying and sky of such structure to insulating trip The humidity requirement of gas is all very high, national standard requirement is otherwise extremely difficult to, while there is very big potential safety hazard.

The content of the invention

For the problem that above-mentioned prior art is present, the purpose of this utility model is to provide that a kind of mounting structure is succinct, energy Enough increase iron core to the insulation resistance of folder, increase the reliability of Transformer Winding insulation safety, while ensure using safely, prolong The insulation system of the dry-type transformer of long life.

For achieving the above object, the technical solution adopted in the utility model is：A kind of insulation system of dry-type transformer, bag Transformer body and bearing are included, the bearing is arranged on transformer body bottom, and transformer body includes iron core, on the iron core Portion and bottom are respectively mounted a hold assembly, the hold assembly of upper and lower by both sides before and after transformer body arrange it is many The vertical arm-tie connection of root, the hold assembly in the past, rear side clamp iron core, arm-tie upper/lower terminal be respectively cooperating with it is embedded it is upper, In the positioning web that lower hold assembly is arranged on a side surface of iron core, upper and lower hold assembly is linked together；It is described Clamp insulation body is provided between hold assembly and iron core, clamp insulation body includes being located at the insulation board of clamping member surfaces, insulation About many insulation filler strips being arranged in parallel are bonded between plate and iron core；Arm-tie insulation is provided between the arm-tie and iron core Body.

Preferably, the hold assembly includes that the past, rear side clamp the folder of iron core, and folder is fastened by bolts in ferrum Core front and rear sides.

Preferably, the iron core is formed by multi-disc stalloy stack.

Preferably, the two ends of the arm-tie are constriction head, the positioning groove shape phase on constriction head and positioning web surface Together, and coordinate be embedded in locating slot.

Preferably, positioning web has polylith, and the positioning web quantity on each hold assembly side is identical with arm-tie quantity, And correspondingly the position distribution of arm-tie is arranged on hold assembly on a side surface of iron core.

Preferably, positioning web is welded on hold assembly on a side surface of iron core.

Preferably, arm-tie insulator includes insulating trip, and the insulating trip both sides are in close contact respectively with arm-tie and iron core.

Preferably, the insulation plate thickness 1mm.

Preferably, the insulation filler strip thickness is 6mm.

The upper and lower hold assembly of this utility model pulls connection by drawing, when ensureing that iron core is lifted by crane, upper and lower hold assembly and ferrum Will not disconnect between core.Positioning web is welded near the side of iron core in hold assembly, the connected mode letter that drawing is pulled on the one hand is made It is single, it is not necessary to the securing member such as bolt, alleviate weight and can ensure that overall structure is safe and reliable；On the other hand increased clamping Insulation distance between part innerside face and iron core, when in use, the clamp insulation body in the insulation system of dry-type transformer is thick Degree is greatly increased, and along with clamp insulation body is combined by insulation board and spaced insulation filler strip, creep age distance is from folder Part surface sequentially passes through C points and D points on the A points of insulation board, B points, and insulation filler strip, and creep age distance is greatly increased, improved Insulation resistance of the iron core to folder, reduces the humidity requirement of the degree of drying to insulating element and air, and environment is fitted Should be able to power it is higher, widened application, have very big promotional value.

Description of the drawings

Fig. 1 is structural representation of the present utility model；

Fig. 2 is the top view of Fig. 1；

Fig. 3 is the hold assembly side view on this utility model transformer body top；

Fig. 4 is the combination diagram of folder and positioning web；

Fig. 5 is the left view of Fig. 4；

Fig. 6 is the end view of this utility model arm-tie；

Fig. 7 is this utility model folder to the creep age distance schematic diagram between iron core；

In figure, 10. transformer body, 11. iron cores, 12. arm-ties, 121. constriction heads, 13. folders, 14. bolts, 15. determine Position web, 151. locating slots, 161. insulation boards, 162. insulation filler strips, 17. insulating trips, 20. bearings.

Specific embodiment

This utility model is described in further detail below in conjunction with the accompanying drawings.

As illustrated, a kind of insulation system of dry-type transformer, including transformer body 10 and bearing 20, the bearing 20 Installed in the bottom of transformer body 10, transformer body 10 includes iron core 11, and the upper and lower of the iron core 11 is respectively mounted one Hold assembly, the hold assembly of upper and lower is connected by many vertical arm-ties 12 that both sides before and after transformer body 10 are arranged Connect, described hold assembly the past, rear side clamp iron core 11, the upper/lower terminal of arm-tie 12 is respectively cooperating with being embedded in upper and lower hold assembly In the positioning web 15 arranged on one side surface of neighbouring iron core 11, upper and lower hold assembly is linked together；The clamping part Clamp insulation body is provided between part and iron core 11, clamp insulation body includes being located at the insulation board 161 of clamping member surfaces, insulation board About many insulation filler strips 162 being arranged in parallel are bonded between 161 and iron core 11；It is provided between the arm-tie 12 and iron core 11 Arm-tie insulator.

Preferably, include that the past, rear side clamp the folder 13 of iron core 11 to ensure the hold assembly, folder 13 leads to Cross bolt 14 and be fastened on the front and rear sides of iron core 11.

Preferably, the iron core 11 is formed by multi-disc stalloy stack.

Preferably, the two ends of the arm-tie 12 are constriction head 121, and constriction head 121 is determined with the surface of positioning web 15 The position shape of groove 151 is identical, and cooperation is embedded in locating slot 151.Constriction head 121 is embedded in after locating slot 151, and locating slot 151 has There is the position-limiting action to constriction head 121, it is ensured that arm-tie 12 and the stable connection of upper and lower hold assembly, will not release, be not required to Want unnecessary securing member to add to be solidly connected；Structure safety is ensure that while reducing parts, mitigating overall weight.

The positioning web 15 that this utility model hold assembly is arranged on a side surface of iron core 11 can be a monoblock, Preferably, in order to further mitigate overall weight, positioning web 15 has polylith, the positioning web on each hold assembly side 15 quantity are identical with the quantity of arm-tie 12, and the position distribution of correspondence arm-tie 12 is arranged on side table of the hold assembly adjacent to iron core 11 On face.

Preferably, for proof strength, positioning web 15 is welded on hold assembly on a side surface of iron core 11.

Preferably, arm-tie insulator includes insulating trip 17, and the both sides of the insulating trip 17 are tight with iron core 11 with arm-tie 12 respectively Contiguity is touched.

Preferably, the thickness 1mm of the insulation board 161.

Preferably, insulation filler strip 162 thickness is 6mm.Insulating, filler strip 162 is too thick to affect overall installation strength, Too thin and can be difficult to ensure that insulation characterisitic, Jing test of many times, such thickness both ensure that enough creep age distances, also cause whole Body design is compacter.

The upper and lower hold assembly of this utility model pulls 12 connections by drawing, when ensureing that iron core 11 is lifted by crane, upper and lower hold assembly Will not disconnect between iron core 11；Positioning web 15 is welded near the side of iron core 11 in hold assembly, on the one hand makes drawing pull 12 Connected mode it is simple, it is not necessary to the securing member such as bolt, alleviate weight and can ensure that overall structure is safe and reliable；The opposing party Face increased the insulation distance between hold assembly medial surface and iron core 11, when in use, in the insulation system of dry-type transformer Clamp insulation body thickness greatly increase, add clamp insulation body by insulation board 161 and it is spaced insulation filler strip 162 combine Form, as shown in fig. 7, creep age distance sequentially passes through C points and D on A points, B points, and insulation filler strip 162 from the surface of folder 13 Point, overall length is the length summation of AB+BC+CD, and relative to the creep age distance of original 1mm, this utility model creep age distance is obtained very Big raising, improves insulation resistance of the iron core 11 to folder 13 naturally, reduces the degree of drying to insulating element and air Humidity requirement, it is higher to the adaptability of environment, widened application, have very big promotional value.

Claims

1. a kind of insulation system of dry-type transformer, including transformer body (10) and bearing (20), the bearing (20) is installed In transformer body (10) bottom, transformer body (10) includes iron core (11), and iron core (11) upper and lower is pacified respectively A hold assembly is filled, the hold assembly of upper and lower is by transformer body (10) many vertical drawings that in front and back both sides are arranged Plate (12) connects, it is characterised in that described hold assembly the past, rear side clamp iron core (11), arm-tie (12) upper/lower terminal point Pei He not be embedded in the positioning web (15) that upper and lower hold assembly is arranged on a side surface of iron core (11), by upper and lower folder Hold part to link together；Clamp insulation body is provided between the hold assembly and iron core (11), clamp insulation body includes being located at The insulation board (161) of clamping member surfaces, be bonded between insulation board (161) and iron core (11) about many be arranged in parallel it is exhausted Edge filler strip (162)；Arm-tie insulator is provided between the arm-tie (12) and iron core (11).

2. the insulation system of dry-type transformer according to claim 1, it is characterised in that the hold assembly include from Forward and backward side clamps the folder (13) of iron core (11), and folder (13) is fastened on iron core (11) front and rear sides by bolt (14).

3. the insulation system of dry-type transformer according to claim 1, it is characterised in that the iron core (11) is by multi-disc silicon Steel disc stack is formed.

4. the insulation system of dry-type transformer according to claim 1, it is characterised in that the two ends of the arm-tie (12) are Constriction head (121), constriction head (121) is identical with locating slot (151) shape on positioning web (15) surface, and cooperation is embedded in In locating slot (151).

5. the insulation system of dry-type transformer according to claim 1, it is characterised in that positioning web (15) has polylith, Positioning web (15) quantity on each hold assembly side is identical with arm-tie (12) quantity, and the position point of correspondence arm-tie (12) Cloth is arranged on hold assembly on a side surface of iron core (11).

6. the insulation system of dry-type transformer according to claim 1, it is characterised in that positioning web (15) is welded on folder Part is held on a side surface of iron core (11).

7. the insulation system of dry-type transformer according to claim 1, it is characterised in that arm-tie insulator includes insulating trip (17), insulating trip (17) both sides are in close contact respectively with arm-tie (12) and iron core (11).

8. the insulation system of dry-type transformer according to claim 1, it is characterised in that insulation board (161) thickness 1mm。

9. the insulation system of dry-type transformer according to claim 1, it is characterised in that the insulation filler strip (162) is thick Spend for 6mm.