CN217822322U - Independent 800KV small-transformation-ratio oil-immersed inverted mutual inductor - Google Patents

Abstract

The utility model relates to a stand alone type 800KV little transformation ratio oil-immersed handstand formula mutual-inductor, wherein the main insulation includes head main insulation and vertical main insulation, and head main insulation is the ring form and locates in the head oil conservator, vertical main insulation is located in the insulating overcoat, primary winding is a whole wire and twines on the ring of head main insulation, and the primary winding wire passes head main insulation ring many times, head oil conservator is equipped with a terminal block, and primary winding wire both ends are connected with corresponding terminal block respectively, the inside secondary winding that is equipped with of head main insulation, and secondary winding sets up along the circumferencial direction of head main insulation ring, be equipped with the lead wire chamber in the vertical main insulation, the insulating overcoat downside is equipped with the secondary terminal box, and the lead wire of secondary winding passes and is connected with the secondary terminal box behind the lead wire chamber. The utility model discloses transformer error isoparametric is qualified more easily, and structure and technology are simpler simultaneously, can satisfy 800KV little transformation ratio oil-immersed stand alone type mutual-inductor design requirement.

Description

Independent 800KV small-transformation-ratio oil-immersed inverted mutual inductor

Technical Field

The utility model relates to a stand alone type 800KV little transformation ratio oil-immersed handstand mutual-inductor.

Background

In the prior art, various power transmission and transformation equipment applied to power lines gradually extend to the fields of ultrahigh voltage and extra-high voltage, for example, up to now, a small transformation ratio 750kV ultrahigh voltage oil immersion inverted current transformer has been developed successfully and practically used at home and abroad, wherein a current transformer in a GIS form is mainly adopted on an internal 750kV line, and a primary terminal + secondary winding structure is generally adopted for the GIS current transformer, for example, a current transformer for GIS is disclosed in the chinese utility model patent with the publication number of CN201465788U, which is provided with a primary terminal inside a shielding cylinder, and a secondary coil is wound outside the shielding cylinder, and for example, an inverted electronic current transformer is disclosed in the chinese utility model patent with the publication number of CN201812666U, which comprises a primary terminal, a secondary winding and other structures, a primary terminal insulating layer is wound on the primary terminal, and the primary terminal insulating layer pass through the secondary winding. However, for the current transformer with small transformation ratio, due to design and process reasons, product errors and precision are difficult to guarantee, and only a small load can be selected, so that the research and development of the independent 800KV oil-immersed independent transformer with small transformation ratio are still in an exploration stage at present.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a stand alone type 800KV little transformation ratio oil-immersed handstand formula mutual-inductor, mutual-inductor error isoparametric are qualified more easily, and structure and technology are simpler simultaneously, can satisfy the oily stand alone type mutual-inductor designing requirement of 800KV little transformation ratio in the technology, make the oily stand alone type mutual-inductor of 800KV little transformation ratio use to put into production possible.

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

the independent 800KV small-transformation-ratio oil-immersed inverted mutual inductor comprises a head oil conservator, an insulating outer sleeve, a main insulator, a primary winding, a secondary winding and an expander assembly, wherein the head oil conservator is arranged at the upper end of the insulating outer sleeve, the expander assembly is arranged on the upper side of the head oil conservator, the main insulator comprises a head main insulator and a vertical main insulator, the head main insulator is in a ring shape and is arranged in the head oil conservator, the vertical main insulator is arranged in the insulating outer sleeve, the primary winding is a whole wire and is wound on the ring of the head main insulator, the primary winding wire penetrates through the head main insulating ring for multiple times, primary terminal blocks are arranged on two sides of the head oil conservator, a starting end and a finishing end of the primary winding wire are respectively connected with the corresponding primary terminal blocks, the secondary winding is arranged in the head main insulator and is arranged along the circumferential direction of the head main insulator, a lead cavity is arranged in the vertical main insulator, a secondary terminal box is arranged on the lower side of the insulating outer sleeve, and a lead of the secondary winding penetrates through the lead cavity and then is connected with the secondary terminal box.

The expander assembly comprises an expander outer cover and an expander, the expander outer cover is connected with the head oil conservator, and the expander is arranged in the expander outer cover.

The vertical main insulation thickness decreases from top to bottom.

The lower end of the insulating outer sleeve is provided with a base.

The utility model discloses an advantage does with positive effect:

the utility model discloses locate the head main insulation outside and twine on the ring of head main insulation with the wire of primary winding, the inside secondary winding that is equipped with of head main insulation, primary winding adopts a whole wire coiling on head main insulation, and the primary winding wire is once promptly a circle for every passing head main insulation ring to increased the number of turns of little transformation ratio mutual-inductor primary winding, made mutual-inductor error isoparametric more qualified easily, structure and technology are simpler simultaneously, can satisfy the little transformation ratio of 800KV on the technology and soak independent type mutual-inductor designing requirement, make the little transformation ratio of 800KV soak independent type mutual-inductor use and put into production possible.

Drawings

Figure 1 is a schematic structural diagram of the present invention,

figure 2 is a top view of the head insulation of figure 1,

figure 3 is a view from direction a of figure 2,

fig. 4 is a schematic diagram of the number of primary winding turns in fig. 3.

The expander comprises an expander outer cover 1, an expander 2, a head oil conservator 3, a primary winding 4, a main insulation 5, a head main insulation 501, a vertical main insulation 502, a lead cavity 503, a secondary winding 6, a primary terminal board 7, an insulation outer sleeve 8, a secondary terminal box 9 and a base 10.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1-4, the utility model comprises a head oil conservator 3, an insulating coat 8, a main insulator 5, a primary winding 4, a secondary winding 6 and an expander component, wherein the head oil conservator 3 is arranged on the upper end of the insulating coat 8, the head oil conservator 3 is communicated with the inside of the insulating coat 8, the expander component is arranged on the upper side of the head oil conservator 3, the main insulator 5 comprises a head main insulator 501 and a vertical main insulator 502, wherein the head main insulator 501 is in a ring shape and is arranged in the head oil conservator 3, the vertical main insulator 502 is arranged in the insulating coat 8, as shown in fig. 3-4, a lead of the primary winding 4 is arranged outside the head main insulator 501 and is wound on a ring of the head main insulator 501, the lead of the primary winding 4 is one turn after passing through the circular ring of the head main insulation 501 once, a multi-turn structure is formed after passing through the circular ring of the head main insulation 501 for multiple times, primary terminal boards 7 are arranged on two sides (P1 side and P2 side) of the head oil conservator 3, as shown in FIG. 2, the beginning and the end of the lead of the primary winding 4 are respectively connected with the corresponding primary terminal boards 7, as shown in FIG. 1, a secondary winding 6 is arranged inside the head main insulation 501, the secondary winding 6 is arranged along the circumferential direction of the circular ring of the head main insulation 501, a lead cavity 503 is arranged in the vertical main insulation 502, a secondary terminal box 9 is arranged on the lower side of the insulation outer sleeve 8, and the lead of the secondary winding 6 is connected with the secondary terminal box 9 after passing through the lead cavity 503.

As shown in fig. 1, the expander assembly includes an expander housing 1 and an expander 2, the expander housing 1 is connected to the head conservator 3, the expander 2 is disposed in the expander housing 1, and the expander 2 is well known in the art.

In this embodiment, the main insulation 5 is wrapped by using insulation paper and a high voltage screen, wherein as shown in fig. 1, the vertical main insulation 502 of the main insulation 5 is wrapped in a stepped manner, and the thickness thereof decreases from top to bottom. The insulating paper and the high voltage screen are all well known in the art.

In this embodiment, the insulating housing 8 is an explosion-proof composite insulator housing, which is well known in the art, and as shown in fig. 1, a base 10 is provided at the lower end of the insulating housing 8 for supporting the whole product.

In this embodiment, the wires of the primary winding 4 and the wires of the secondary winding 6 both adopt soft copper stranded wires, wherein according to the designed turn number calculation structure, the more times the primary winding 4 passes through the circular ring of the head main insulation 501, that is, the more the number of turns, the more easily the qualification of the small current ratio transformer error and the like is ensured, which is a known technology in the art.

As shown in fig. 3-4, the primary winding 4 is formed by winding a whole soft copper wire, the process is simple, the installation is convenient, the cost is low, the phenomena of sharp-angled burrs and easy breakage caused by welding can be avoided, the sufficient heat dissipation space is ensured, the temperature rise inside the product is effectively reduced, the aging degree of the main insulation 5 is further reduced, and the service life of the product is prolonged.

The utility model discloses a theory of operation does:

the utility model discloses a main insulation 5 includes head main insulation 501 and vertical main insulation 502, wherein head main insulation 501 is the ring form and locates in head oil conservator 3, and vertical main insulation 502 locates in insulating overcoat 8, and head main insulation 501 outside and twine on head main insulation 501's ring are located to primary winding 4's wire, and head main insulation 501 inside is equipped with secondary winding 6, and secondary winding 6 along the circumferencial direction setting of head main insulation 501 ring, primary winding 4 adopts a whole soft copper wire coiling to form, and it is once for a circle once to pass head main insulation 501 ring, passes many times and forms multiturn structure, and it is qualified such as little current ratio mutual-inductor error that the number of turns is more also easy to guarantee more, and primary winding 4 adopts a whole soft copper wire coiling to form, simple process, simple to operate, the cost is also lower, can avoid because closed angle burr and the easy disconnected phenomenon that the welding leads to take place, and guaranteed sufficient heat dissipation space, can satisfy 800KV on the technology little transformation ratio oily design requirement of standing alone type, make the oily transformer of independent type put into production become probably with oil.

Claims (4)

1. An independent 800KV small transformation ratio oil-immersed inverted mutual inductor is characterized in that: comprises a head oil conservator (3), an insulating outer sleeve (8), a main insulator (5), a primary winding (4), a secondary winding (6) and an expander component, wherein the head oil conservator (3) is arranged at the upper end of the insulating coat (8), the expander component is arranged at the upper side of the head oil conservator (3), the main insulation (5) comprises a head main insulation (501) and a vertical main insulation (502), the head main insulation (501) is annular and arranged in the head oil conservator (3), the vertical main insulation (502) is arranged in the insulation outer sleeve (8), the primary winding (4) is a whole lead and is wound on the circular ring of the head main insulation (501), and the lead of the primary winding (4) passes through the head main insulation (501) ring for many times, the two sides of the head oil conservator (3) are provided with primary terminal boards (7), the beginning and the end of the lead of the primary winding (4) are respectively connected with a corresponding primary terminal board (7), a secondary winding (6) is arranged in the head main insulation (501), the secondary winding (6) is arranged along the circumferential direction of a circular ring of the head main insulation (501), a lead cavity (503) is arranged in the vertical main insulation (502), a secondary terminal box (9) is arranged at the lower side of the insulation outer sleeve (8), and the lead of the secondary winding (6) passes through the lead cavity (503) and then is connected with the secondary terminal box (9).

2. The independent 800KV oil-immersed inverted transformer with small transformation ratio according to claim 1, characterized in that: the expander assembly comprises an expander outer cover (1) and an expander (2), the expander outer cover (1) is connected with the head oil conservator (3), and the expander (2) is arranged in the expander outer cover (1).

3. The independent 800KV oil-immersed inverted transformer with small transformation ratio according to claim 1, characterized in that: the vertical main insulation (502) thickness decreases from top to bottom.

4. The independent 800KV oil-immersed inverted transformer with small transformation ratio according to claim 1, characterized in that: the lower end of the insulating outer sleeve (8) is provided with a base (10).

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