CN214099384U

CN214099384U - Transformer

Info

Publication number: CN214099384U
Application number: CN202022332408.2U
Authority: CN
Inventors: 宋世威; 郭伟强
Original assignee: Ningbo Aux High Tech Co Ltd
Current assignee: Ningbo Aokes Intelligent Technology Co ltd
Priority date: 2020-10-19
Filing date: 2020-10-19
Publication date: 2021-08-31
Anticipated expiration: 2030-10-19

Abstract

The utility model discloses a transformer, which comprises an oil tank (1), a transformer body (2), an iron core (3), a winding coil (4) and a switch structure (5), wherein the switch structure (5) comprises a fixed support (51), a movable support (52), a winding drum (53), a first flexible rope (54) and a knob (56), and the winding drum (53) can be rotatably connected to the oil tank (1); the knob (56) is installed on the winding drum (53) and exposed out of the oil tank (1), and the winding drum (53) can be driven to rotate under the action of external force, so that the movable support (52) is driven to move relative to the fixed support (51) through the first flexible rope (54) or the second flexible rope (55). Compared with the prior art, the utility model discloses a transformer can reduce occupation space.

Description

Transformer

Technical Field

The utility model relates to a transformer technical field specifically indicates a transformer.

Background

A tap switch with adjustable gears is required to be installed on the high-voltage side of a conventional oil-immersed transformer and used for voltage regulation when the voltage of a working site has deviation, and the tap switch is fixed on an oil tank cover according to the size designed by a drawing. During assembly of the transformer body, the switch and the lead are required to be arranged, and the fixed position of the tap switch is matched with the fixed position of the oil tank cover. In particular, refer to the utility model patent with patent application No. CN201821155486.6 (publication No. CN208521772U) entitled "a tap changer lead wire support on oil immersed transformer".

The tap switch generally comprises an operating mechanism, a fixed contact seat and a movable contact device, and the operating mechanism drives a movable contact support to select a required voltage ratio. For example, the utility model patent No. CN02218500.3 (publication No. CN2545682Y) discloses an off-circuit tap changer for a three-phase transformer, which comprises a fixed contact seat, a driven support with a local rack, an operating device for moving the fixed contact seat and the driven support relatively, fixed contacts on the fixed contact seat, and three groups of moving contact devices connected to the driven support, wherein the operating device comprises a switch seat, a gear shaft, and a gear indicating sleeve. During operation, the gear rotating shaft is rotated, the driven support and the fixed contact seat are driven to move relatively through the gear at the front part of the gear rotating shaft and the rack engagement of the driven support, so that the movable contact piece and each group of fixed contacts are reliably contacted, and voltage regulation is realized.

However, the above-mentioned operating device occupies a large space and increases the size of the fuel tank.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to prior art's current situation, provide a can reduce occupation space's transformer.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a transformer comprises

The oil tank is hollow inside;

the device body is arranged in the oil tank and is provided with an accommodating groove;

the iron core is arranged in the accommodating groove;

a winding coil wound around the core; and

the switch structure is electrically connected with the winding coil through a lead wire and is used for regulating voltage;

the method is characterized in that: the switch structure comprises

The fixed support is arranged on the transformer body and is provided with a fixed contact group, the fixed contact group comprises at least three fixed contacts which are arranged at intervals along the length direction of the fixed support and are used for leading wire connection, guide seats are arranged at two ends of the fixed support, and guide holes are formed in the guide seats;

the movable bracket is provided with a movable contact piece corresponding to the fixed contact group;

the winding drum is rotatably connected to the oil tank;

the first end of the first flexible rope passes through the guide hole at the first end of the fixed bracket and is connected with the first end of the movable bracket, and the second end of the first flexible rope is wound on the winding drum;

the first end of the second flexible rope penetrates through a guide hole at the second end of the fixed support and is connected to the second end of the movable support, the second end of the second flexible rope is wound on the winding drum, and the winding directions of the first flexible rope and the second flexible rope are opposite; and

the knob is installed on the winding drum, is exposed out of the oil tank and can drive the winding drum to rotate under the action of external force, so that the movable support is driven by the first flexible rope or the second flexible rope to move relative to the fixed support, and the movable contact piece is in contact with the two adjacent fixed contacts.

In order to avoid interference of simultaneous tensioning of the first flexible rope and the second flexible rope, the second flexible rope is in a relaxed state when the first flexible rope is in a tensioned state; when the second flexible rope is in a tensioned state, the first flexible rope is in a relaxed state.

In order to reduce the abrasion of the first flexible rope and the second flexible rope, a flexible sleeve for the first flexible rope or the second flexible rope to pass through is arranged in the guide hole.

In order to ensure that the two flexible ropes drive the movable support, the distance between the two guide seats is larger than that of the movable support.

In order to facilitate the winding of the first flexible rope and the second flexible rope on the winding drum and avoid wasting the length of the flexible rope, the second end of the first flexible rope is connected with the second end of the second flexible rope.

In order to facilitate the processing of the winding drum and the knob, the winding drum and the knob are integrated.

In order to facilitate the connection between the winding drum and the knob, the winding drum and the knob are connected through a rotating shaft, and the rotating shaft can be rotatably arranged on the oil tank in a penetrating mode.

In order to ensure the limit of the rotating shaft on the oil tank, the wall surface of the oil tank, which is positioned on the periphery of the rotating shaft, is limited between the opposite surfaces of the winding drum and the knob.

In order to facilitate the operation of a user on the knob, the peripheral wall of the knob is convexly provided with friction convex points.

Preferably, the number of the fixed contact groups is at least two, and the fixed contact groups are arranged at intervals along the length direction of the fixed support.

Compared with the prior art, the utility model has the advantages of: because the first flexible rope and the second flexible rope are flexible parts, on one hand, the occupied space is small, and the size of the oil tank can be reduced; on the other hand, the requirement on the installation position is low, the fixed support and the movable support can be installed at any position of the transformer body, the arrangement of the lead is simplified, and the manufacturing period of the lead is shortened.

Drawings

Fig. 1 is a front view of an embodiment of the transformer of the present invention (with part of the oil tank omitted);

fig. 2 is a top view of an embodiment of the transformer of the present invention (a part of the oil tank and the transformer body are omitted);

fig. 3 is a schematic structural view of the switch structure cooperating with the oil tank in the embodiment of the present invention;

fig. 4 is a structural schematic view of the fixed bracket and the movable bracket in another direction in fig. 3.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 4, it is a preferred embodiment of the transformer of the present invention. The transformer comprises an oil tank 1, a transformer body 2, an iron core 3, a winding coil 4 and a switch structure 5.

The fuel tank 1 is hollow.

The body 2 is mounted in the oil tank 1, and a receiving groove 21 is formed in the body 2.

The iron core 3 is mounted in the accommodating groove 21. In this embodiment, the iron cores 3 are made of amorphous alloy strips, and the number of the iron cores 3 is 4, and the iron cores are sequentially arranged along the length direction of the body 2.

The winding coil 4 is wound around the two adjacent cores 3.

The switching structure 5 is electrically connected to the winding coil 4 through a lead wire for adjusting the voltage.

In this embodiment, the switch structure 5 includes a fixed bracket 51, a movable bracket 52, a winding drum 53, a first flexible rope 54, a second flexible rope 55, and a knob 56, where the fixed bracket 51, the movable bracket 52, the winding drum 53, the first flexible rope 54, and the second flexible rope 55 are located inside the oil tank 1, and the knob 56 is located outside the oil tank 1.

Specifically, the fixed support 51 is mounted on the upper portion of the body 2, at least two fixed contact groups 511 arranged at intervals along the length direction of the fixed support 51 are mounted on the fixed support 51, each fixed contact group 511 includes at least three fixed contacts 5111 arranged at intervals along the length direction of the fixed support 51, the number of the fixed contact groups 511 is three, the fixed contact groups correspond to the winding coils 4 one by one, the number of the fixed contacts 5111 in each fixed contact group 511 is six, and the fixed contacts are respectively electrically connected with the corresponding winding coils 4 through leads; the two ends of the fixed bracket 51 are provided with guide seats 512, guide holes 5121 are formed on the guide seats 512, and flexible sleeves 5122 are installed in the guide holes 5121;

the movable bracket 52 is movably connected to the fixed bracket 51 and has movable contact pieces 521 corresponding to the fixed contact sets 511 one by one, in this embodiment, the movable contact pieces 521 are in a C shape, are limited on the periphery of the fixed bracket 51 and can move relative to the fixed bracket 51 along with the movable bracket 52.

The winding drum 53 is rotatably connected to the oil tank 1 through a rotating shaft 531;

the first end of the first flexible rope 54 is connected to the first end of the movable bracket 52 through the flexible sleeve 5122 at the first end of the fixed bracket 51, and the second end is wound on the winding drum 53;

the first end of the second flexible rope 55 is connected to the second end of the movable bracket 52 through the flexible sleeve 5122 at the second end of the fixed bracket 51, the second end is wound on the winding drum 53, the second end of the first flexible rope 54 is connected to the second end of the second flexible rope 55, and the winding directions of the first flexible rope 54 and the second flexible rope 55 are opposite;

the knob 56 is mounted on the rotating shaft 531 of the winding drum 53 and is exposed out of the oil tank 1, the wall surface 10 of the oil tank 1, which is located on the periphery of the rotating shaft 531, is limited between the opposite surfaces of the winding drum 53 and the knob 56, and the peripheral wall of the knob 56 is convexly provided with a friction bump 561, so that the operation of a user is facilitated. The knob 56 is rotated to drive the winding drum 53 to rotate, so that the movable bracket 52 is driven to move relative to the fixed bracket 51 through the first flexible rope 54 or the second flexible rope 55, the movable contact piece 521 is in contact with the two adjacent fixed contacts 5111, and the pressure regulating function is realized.

In the state that the knob 56 rotates forward, the first flexible rope 54 is wound on the winding drum 53 and is in a tensioned state, and the second flexible rope 55 is unwound from the winding drum 53 and is in a relaxed state, so as to drive the movable support 52 to move from the second end to the first end;

in the state that the knob 56 is reversed, the first flexible cord 54 is unwound from the reel 53 and is in a slack state, and the second flexible cord 55 is wound on the reel 53 and is in a tensioned state, so as to drive the movable bracket 52 to move from the first end to the second end.

The working principle of the utility model is as follows: when the gear of the switch structure 5 needs to be adjusted, the winding drum 53 can be driven to rotate only by rotating the knob 56, and then the movable bracket 52 is driven to move relative to the fixed bracket 51 through the first flexible rope 54 or the second flexible rope 55, so that the movable contact piece 521 is in contact with two adjacent fixed contacts 5111 at different positions, and the pressure adjusting function is realized.

Since the first flexible rope 54 and the second flexible rope 55 are flexible members, on one hand, the occupied space is small, and the size of the oil tank 1 can be reduced; on the other hand, the requirement on the installation position is low, the fixed bracket 51 and the movable bracket 52 can be installed at any position of the body 2, the arrangement of the lead wires is simplified, and the manufacturing period of the lead wires is shortened.

Claims

1. A transformer comprises

An oil tank (1) which is hollow inside;

a body (2) which is installed in the oil tank (1) and has an accommodation groove (21);

the iron core (3) is arranged in the accommodating groove (21);

a winding coil (4) wound around the core (3); and

the switch structure (5) is electrically connected with the winding coil (4) through a lead wire and is used for regulating voltage;

the method is characterized in that: the switch structure (5) comprises

The fixed support (51) is arranged on the body (2) and is provided with a fixed contact group (511), the fixed contact group (511) comprises at least three fixed contacts (5111) which are arranged at intervals along the length direction of the fixed support (51) and are used for leading wire connection, two ends of the fixed support (51) are provided with guide seats (512), and the guide seats (512) are provided with guide holes (5121);

a movable bracket (52) having a movable contact piece (521) corresponding to the fixed contact group (511);

a drum (53) rotatably connected to the oil tank (1);

a first flexible rope (54) with a first end passing through the guide hole (5121) of the first end of the fixed bracket (51) and connected with the first end of the movable bracket (52), and a second end wound on the winding drum (53);

a second flexible rope (55), the first end of which passes through the guide hole (5121) of the second end of the fixed bracket (51) and is connected with the second end of the movable bracket (52), the second end of which is wound on the winding drum (53), and the winding directions of the first flexible rope (54) and the second flexible rope (55) are opposite; and

the knob (56) is installed on the winding drum (53), is exposed out of the oil tank (1), and can drive the winding drum (53) to rotate under the action of external force, so that the movable support (52) is driven by the first flexible rope (54) or the second flexible rope (55) to move relative to the fixed support (51), and the movable contact piece (521) is in contact with the two adjacent fixed contacts (5111).

2. The transformer of claim 1, wherein: -said second flexible cord (55) is in a relaxed state with said first flexible cord (54) in a tensioned state; the first flexible cord (54) is in a relaxed state when the second flexible cord (55) is in a tensioned state.

3. The transformer of claim 1, wherein: a flexible sleeve (5122) for the first flexible rope (54) or the second flexible rope (55) to pass through is arranged in the guide hole (5121).

4. The transformer of claim 1, wherein: the distance between the two guide seats (512) is larger than that of the movable bracket (52).

5. The transformer of claim 1, wherein: the second end of the first flexible rope (54) is connected with the second end of the second flexible rope (55).

6. The transformer of claim 1, wherein: the winding drum (53) and the knob (56) are integrated.

7. The transformer of claim 1, wherein: the winding drum (53) is connected with the knob (56) through a rotating shaft (531), and the rotating shaft (531) can be rotatably arranged on the oil tank (1) in a penetrating way.

8. The transformer of claim 7, wherein: the oil tank (1) is located the wall surface (10) of pivot (531) periphery is spacing in between the relative face of reel (53) and knob (56).

9. The transformer of claim 1, wherein: the outer peripheral wall of the knob (56) is convexly provided with a friction bump (561).

10. The transformer according to any one of claims 1 to 9, wherein: the number of the fixed contact groups (511) is at least two, and the fixed contact groups are arranged at intervals along the length direction of the fixed support (51).