CN111312466A

CN111312466A - Three-phase integrated coil of dry type voltage-regulating soft starter

Info

Publication number: CN111312466A
Application number: CN202010286347.2A
Authority: CN
Inventors: 刘洪安; 谢德友; 谢雪军; 李齐新; 谢耀平; 杨超; 汪耀; 赵明
Original assignee: Hunan Ke Tai Electric Co ltd
Current assignee: Hunan Ke Tai Electric Co ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-06-19

Abstract

A three-phase integrated coil of a dry-type voltage-regulating soft starter comprises an inner cylinder, three leads, epoxy resin glue, a fixing plate and lead copper bars, wherein the inner cylinder and the fixing plate are made of epoxy resin materials; sealing the three coils by using epoxy resin glue to form an A/B/C three-phase coil whole; the fixing plate is fixed with the coil through a bolt structure. The three-phase integrated coil is poured by epoxy resin, so that the coil layer or turn-to-turn insulation sealing performance is good, the firmness and the stability are strong, the coil cannot be directly contacted with air, the insulation performance, the electrical performance and the moisture-proof and oil-proof performance are good, the three coils are arranged in order, the A/B/C three-phase coil is influenced by electromagnetic induction to be balanced in the use process of dry type voltage regulation soft start, the failure rate of a starter is reduced, and the service life is prolonged.

Description

Three-phase integrated coil of dry type voltage-regulating soft starter

Technical Field

The invention relates to the technical field of power equipment, in particular to a three-phase integrated coil of a dry type voltage-regulating soft starter.

Background

At present, high-power and high-voltage electrical equipment is used in the industrial fields of buildings, metallurgy, mines, petrifaction, power generation and the like, and higher requirements are continuously put forward on the functions of related equipment in the industries. In many large-scale power equipment, the coil plays a very important role as an indispensable component. The coil is usually a ring-shaped wire winding, can generate the functions of flow resistance, voltage transformation, cross connection, load and the like in an alternating current circuit, and can also play the functions of tuning, filtering, frequency selection, frequency division, decoupling and the like when the coil is matched with a capacitor.

For example, in soft starter equipment, the characteristic of realizing voltage transformation and current blocking of a coil is mainly utilized, the coil has good insulation for realizing functions, the insulation treatment of the coil in the prior art generally adopts casting epoxy resin, but most of the coils are single-phase coils and are subjected to insulation treatment one by one, for equipment with a plurality of coils, a plurality of separately cast coils are required to be combined to form a specific function unit, the mode often causes the appearance structure of the equipment to be not compact and stable enough, the possibility of deviation of an assembly position exists, and the integral insulation effect is unstable; in the use process, the shaking of the coils caused by unbalanced stress of the coils can damage the internal insulation of the coils, so that the interlayer or turn-to-turn short circuit of the coils is caused to be arc-discharged, and the equipment cannot be normally used.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the three-phase integrated coil of the dry type voltage-regulating soft starter is integrated, synchronous casting molding is performed, the structure is compact, and the appearance is attractive.

The technical scheme adopted by the invention for solving the technical problems is as follows: a three-phase integrated coil of a dry-type voltage-regulating soft starter comprises an inner cylinder, three leads, epoxy resin glue, a fixed plate and lead copper bars, wherein the inner cylinder and the fixed plate are made of epoxy resin materials; sealing the three coils to form an A/B/C three-phase coil whole by adopting a vacuum glue injection process and epoxy resin glue; the fixing plate is fixed with the coil through a bolt structure.

Further, the fixed plate includes front end epoxy board and back end epoxy board, wherein all is equipped with the notch on front end epoxy board and the back end epoxy board, and the size and the inner tube cylinder bottom surface of notch suit, and the inner tube two all surpasss epoxy glue certain distance, make the both ends of inner tube can imbed in the notch on front end epoxy board and the back end epoxy board.

Furthermore, the fixing plate also comprises a rear end oxygen sealing plate, and the rear end oxygen sealing plate is tightly attached to the rear end oxygen sealing plate for fixing and used for enhancing the overall strength of the fixing plate.

Furthermore, the conducting wire is a copper wire, tapping terminals are extracted from specific positions on the conducting wire, preferably, the tapping terminals are approximately arranged at quartering points on the conducting wire, the tapping terminals are respectively welded with the leading copper bar, the leading copper bar is not completely sealed by epoxy resin glue, and half of the leading copper bar is exposed outside, so that circuit connection is facilitated.

Furthermore, 3 on every coil draw and connect copper bar parallel arrangement to perpendicular to coil curved surface, forming three-phase coil whole back, 9 draw and connect the copper bar and all keep parallel, and lie in three-phase coil with one side, make things convenient for circuit connection wiring.

Furthermore, the front-end epoxy plate, the rear-end epoxy plate and the rear-end epoxy plate are rectangles with the same size, through holes are formed in the same positions of four corners of the rectangles, the through holes are used for installing a bolt structure, and the bolt structure comprises a screw and a nut.

Further, integrative coil of three-phase still includes the epoxy pipe, and the epoxy pipe box is established on the screw rod, and is located simultaneously between front end epoxy board and the back end epoxy board.

The three-phase integrated coil has the beneficial effects that the three-phase integrated coil is poured by adopting epoxy resin, the coil is completely wrapped by the epoxy resin, and a vacuum glue injection process is adopted, so that the inter-layer or inter-turn insulation and sealing performance of the coil is good, the stability is strong, the coil is not easy to loosen, the coil cannot be directly contacted with air, the three coils have better insulation performance, electrical performance and moisture-proof and oil-proof performance, the three coils are arranged in order, the A/B/C three-phase coil is balanced under the influence of electromagnetic induction in the use process of dry type voltage regulation soft start, the failure rate of a starter is reduced, and the service life is prolonged.

Drawings

FIG. 1 is a side view of an inner barrel-wound wire according to example 1 of the present invention;

fig. 2 is a perspective view of the three-phase coil of embodiment 1 of the present invention after glue injection;

fig. 3 is a rear side view of the three-phase coil in the embodiment 1 of the present invention;

FIG. 4 is a schematic side view of example 1 of the present invention;

FIG. 5 is a schematic perspective view of embodiment 1 of the present invention;

fig. 6 is a perspective view of the three-phase coil of embodiment 2 of the present invention after glue injection;

in the figure: 1-inner cylinder, 2-lead wire, 3-epoxy resin glue, 4-leading copper bar, 5-front end epoxy plate, 6-rear end epoxy plate, 7-rear end epoxy plate, 8-epoxy tube, 9-screw rod and 10-nut.

Detailed Description

The invention will be described in further detail below with reference to the drawings and specific examples.

Example 1

As shown in fig. 1-5, the present embodiment is a three-phase integrated coil of a dry voltage regulation soft starter, including an inner tube 1, a conducting wire 2, an epoxy resin adhesive 3, a fixing plate, and a leading copper bar 4, where the inner tube 1 and the fixing plate are both made of epoxy resin material, the inner tube 1 is cylindrical, the number of the inner tubes 1 is three, and the inner tubes 1 are arranged in a straight line, the conducting wire 2 is wound on the inner tube 1 to form a coil, and each coil is provided with three leading copper bars 4; the three coils are sealed by epoxy resin glue 3 to form an A/B/C three-phase coil whole body; the fixing plate is fixed with the coil through a bolt structure.

The fixed plate includes front end epoxy board 5 and back end epoxy board 6, wherein all is equipped with circular notch on front end epoxy board 5 and the back end epoxy board 6, and the diameter of notch slightly is greater than the cylindrical diameter of inner tube 1, and the inner tube 1 both ends all surpass epoxy glue 3 about 2cm, and the both ends of inner tube 1 can imbed in the notch on front end epoxy board 5 and the back end epoxy board 6, makes front end epoxy board 5 and back end epoxy board 6 can clamp inner tube 1 in the centre.

The fixing plate in the embodiment further comprises a rear-end epoxy seal plate 7, the rear-end epoxy seal plate 7 is tightly attached to the rear-end epoxy plate 6, the thickness of the rear-end epoxy seal plate 6 is increased after the rear-end epoxy seal plate is installed, and the overall strength of the fixing plate system is enhanced.

Wire 2 of this embodiment adopts silk glass copper line, and the quartering point department on wire 2 approximately extracts three tapping terminals to respectively with draw and connect copper bar 4 welding, it is incompletely sealed by epoxy glue 3 to draw and connect copper bar 4, has half part to expose outside, the coil of being convenient for and external circuit are connected.

Front end epoxy board 5, back end epoxy board 6 and back end epoxy shrouding 7 are the rectangle of the same size of a dimension, and set up the through-hole in the same position department in four corners, and the through-hole is used for bolt structure's installation, and bolt structure includes screw rod 9 and nut 10.

This embodiment still is equipped with

epoxy pipe

8, and 8 covers of epoxy pipe are established on screw rod 9 to epoxy pipe 8 is located between front end epoxy board 5 and the back end epoxy board 6, and 9 both ends of screw rod are all screwed up fixedly with nut 10, make three-phase coil whole, front end epoxy board 5, back end epoxy board 6, back end epoxy shrouding 7 even as an organic whole with epoxy pipe 8.

The three-phase integrated coil is applied to the dry type voltage-regulating soft starter, the three-phase coil is integrally a three-in-one coil poured by epoxy resin through a vacuum glue injection process, the coil is completely wrapped by the epoxy resin, and the coil cannot be directly contacted with air, so that the three coils have good insulating property, electrical property and moisture-proof and oil-proof performance, the three coils are arranged in order, and in the use process of the dry type voltage-regulating soft starter, the A/B/C three-phase coil is influenced by electromagnetic induction to be balanced, the failure rate of the starter is reduced, and the service life of equipment can be prolonged.

Example 2

As shown in fig. 6, embodiment 2 differs from embodiment 1 only in that: in the embodiment 2, the section of the lead copper bar 4 positioned in the middle of the coil is arc-shaped, so that the induction force between the lead copper bar 4 and the adjacent lead copper bar 4 is reduced; and a layer of metal silver is plated on the surfaces of all the lead copper bars 4 to improve the conductivity.

It should be understood that the above is only one embodiment of the present invention, and is not intended to limit the present invention, and those skilled in the art may combine and modify the present invention with various combinations and modifications of the above-mentioned technical features, and those skilled in the art may apply the structure or method of the present invention to other fields without departing from the spirit and scope of the present invention to achieve the same effect, and all such modifications, variations, equivalents, and modifications are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a dry-type pressure regulating soft starter three-phase body coil, includes inner tube (1), wire (2), epoxy glue (3), fixed plate, draws and connects copper bar (4), its characterized in that: the inner cylinder (1) and the fixing plate are both made of epoxy resin materials, the inner cylinder (1) is cylindrical, the number of the inner cylinder is three, the inner cylinder is arranged in a straight line, a lead (2) is wound on the inner cylinder (1) to form coils, and each coil is provided with three leading copper bars (4); the three coils are sealed by epoxy resin glue (3) to form a three-phase coil whole; the fixed plate is fixed with the coil through a bolt structure.

2. A dry type voltage regulating soft starter three-phase integrated coil as claimed in claim 1, characterized in that: the fixing plate comprises a front-end epoxy plate (5) and a rear-end epoxy plate (6), wherein notches are formed in the front-end epoxy plate (5) and the rear-end epoxy plate (6), and the size of each notch is adapted to the cylindrical bottom surface of the inner cylinder (1); two ends of the inner cylinder (1) are respectively embedded into the notches of the front-end epoxy plate (5) and the rear-end epoxy plate (6) to be fixed conveniently.

3. A dry type voltage regulating soft starter three-phase integrated coil as claimed in claim 2, characterized in that: the fixing plate also comprises a rear end oxygen sealing plate (7), and the rear end oxygen sealing plate (7) is tightly attached to the rear end oxygen sealing plate (6) for fixing and strengthening the overall strength of the fixing plate.

4. A dry type voltage regulating soft starter three-phase integrated coil as claimed in claim 3, characterized in that: wire (2) are silk glass copper line, and specific position extraction tapping head on wire (2) to with draw and connect copper bar (4) welding, it is sealed by epoxy glue (3) not totally to draw and connects copper bar (4), has half part to expose outside.

5. The three-phase integrated coil of the dry type voltage-regulating soft starter as claimed in claim 4, wherein: the tapping head is arranged approximately at the quartering point on the conductor (2).

6. A dry type voltage regulating soft starter three-phase integrated coil as claimed in claim 5, characterized in that: the front-end epoxy plate (5), the rear-end epoxy plate (6) and the rear-end epoxy sealing plate (7) are rectangles with the same size, through holes are formed in the same positions of the four corners and used for installing bolt structures, and each bolt structure comprises a screw (9) and a nut (10).

7. The three-phase integrated coil of the dry type voltage-regulating soft starter as claimed in claim 6, characterized in that: still include epoxy pipe (8), epoxy pipe (8) cover is established on screw rod (9), and epoxy pipe (8) are located between front end epoxy board (5) and rear end epoxy board (6).

8. A dry type voltage regulating soft starter three-phase integrated coil as claimed in claim 2, characterized in that: after the coil is poured with the epoxy resin glue (3), both ends of the inner barrel (1) exceed the epoxy resin glue (3) by 1-2 cm.

9. The three-phase integrated coil of the dry type voltage-regulating soft starter as claimed in claim 4, wherein: 3 leading copper bars on each coil are arranged in parallel, and 9 leading copper bars on the three-phase coil are kept in parallel and are positioned on the same side of the three-phase coil.

10. A dry type voltage regulating soft starter three-phase integrated coil as claimed in claim 9, wherein: in the 3 leading copper bars (4) on each coil, the cross section of the leading copper bar (4) positioned in the middle is circular or arc-shaped, and the surface of the leading copper bar (4) is plated with a layer of metal silver.