CN212874238U

CN212874238U - Novel test transformer

Info

Publication number: CN212874238U
Application number: CN202021656325.2U
Authority: CN
Inventors: 刘鹏; 魏新平; 王光辉; 何飞洲; 吴国威
Original assignee: Wuhan Huashen Electrical Equipment Co ltd
Current assignee: Wuhan Huashen Electrical Equipment Co ltd
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2021-04-02
Anticipated expiration: 2030-08-11

Abstract

The utility model provides a novel testing transformer, which comprises an iron core unit box body, a cover body, a high-voltage sleeve and a coil, wherein the box body is hollow, one end of the box body is open, and the iron core unit and the coil are arranged and fixed in the box body; the cover body is hermetically connected with the box body; a high-voltage bushing and a plurality of input terminals are arranged on one side of the cover body, which is far away from the box body, the high-voltage bushing is fixedly connected with the cover body, one end of the high-voltage bushing extends into the box body and is electrically connected with the output end of the coil, and the input terminals are electrically connected with the input end of the coil; the box is internally provided with a first limiting part and a second limiting part, the first limiting part and the second limiting part are fixedly arranged on the inner surface of the box, the first limiting part and the second limiting part are respectively abutted to the surface of the iron core unit, the first limiting part is fixedly connected with the iron core unit, and the first limiting part and the second limiting part block the iron core unit from moving relative to the box.

Description

Novel test transformer

Technical Field

The utility model relates to a light-duty test transformer equipment technical field especially relates to a novel test transformer.

Background

The test transformer is the necessary equipment for power equipment detection and preventive test. With the development of the power industry in China, the requirements on the test transformer are higher and higher, and the oil-immersed test transformer is limited by the fact that transformer oil is easy to absorb moisture and age and needs to be maintained regularly. The inflatable test transformer gradually replaces the oil-immersed test transformer and is widely applied.

When the test transformer is used, the test transformer usually needs to be frequently moved, and an iron core and a coil of the test transformer need to be in a stable working state so as to provide a reliable detection function. However, in the moving process of the test transformer, the transformer is easy to collide, so that the iron core shakes and even shifts, and the performance of the test transformer is affected.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a can be reliable spacing, the stable novel test transformer of iron core overall structure to the iron core.

The technical scheme of the utility model is realized like this: the utility model provides a novel testing transformer, which comprises an iron core unit (1), a box body (2), a cover body (3), a high-voltage bushing (4) and a coil (5), wherein the box body (2) is hollow and has an opening at one end, the iron core unit (1) and the coil (5) are arranged in the box body (2), and the coil (5) is wound on the iron core unit (1); a cover body (3) is arranged at one open end of the box body (2), and the cover body (3) is hermetically connected with the box body (2); a high-voltage bushing (4) and a plurality of input terminals are arranged on one side, away from the box body (2), of the cover body (3), the high-voltage bushing (4) is fixedly connected with the cover body (3), one end of the high-voltage bushing (4) extends into the box body (2) and is electrically connected with the output end of the coil (5), and the input terminals are electrically connected with the input end of the coil (5); a first limiting part (21) and a second limiting part (22) are arranged in the box body (2), the first limiting part (21) and the second limiting part (22) are fixedly arranged on the inner surface of the box body (2), one end of the first limiting part (21) is fixedly connected with the side wall of the box body (2), and the other end of the first limiting part extends towards the direction vertical to the side wall of the box body (2); one end of the second limiting part (22) is fixedly connected with the inner surface of the non-open end of the box body (2), and the other end of the second limiting part (22) vertically extends upwards along the vertical direction; the first limiting part (21) and the second limiting part (22) are respectively abutted to the surface of the iron core unit (1), the first limiting part (21) is further fixedly connected with the iron core unit (1), and the first limiting part (21) and the second limiting part (22) block the iron core unit (1) from moving relative to the box body (2).

On the basis of the above technical solution, preferably, the first stopper portion (21) is plate-shaped, and the second stopper portion (22) has a rectangular parallelepiped structure.

Further preferably, the core unit (1) comprises a core body (101), a first support frame (102), a second support frame (103) and a support assembly (105); the iron core body (101) is provided with a first mounting part (111) and a second mounting part (112) which are oppositely arranged, the iron core body (101) is provided with a through channel (110), and two ends of the channel (110) are respectively communicated with the surfaces of the iron core body (101) at the first mounting part (111) and the second mounting part (112); the first supporting frame (102) and the second supporting frame (103) are arranged oppositely and at intervals; the iron core body (101) is arranged between the first supporting frame (102) and the second supporting frame (103), the surface of the first supporting frame (102) is abutted against the surface of the first mounting part (111), and the surface of the second supporting frame (103) is abutted against the surface of the second mounting part (112); the first supporting frame (102) is fixedly connected with the second supporting frame (103) to fix and clamp the iron core body (101); the supporting component (105) is positioned between the first supporting frame (102) and the second supporting frame (103), and the supporting component (105) is fixedly connected with the first supporting frame (102) and the second supporting frame (103) respectively; the surface of one end of the supporting component (105) far away from the ground is also propped against the surface of the iron core body (101); the first supporting frame (102) and the second supporting frame (103) are respectively abutted against the first limiting part (21) and the second limiting part (22).

Further preferably, the core body (101) includes a plurality of spacer assemblies (104), and each adjacent spacer assembly (104) is abutted against each other and arranged between the first support frame (102) and the second support frame (103) in a parallel stacking manner; the outer surfaces of the gasket assemblies (104) at the two outermost ends of the iron core body (101) are respectively provided with a first mounting part (111) and a second mounting part (112); each gasket assembly (104) is provided with a through hole (1040), and the through holes (1040) on each adjacent gasket assembly (104) are communicated in sequence to form a channel (110); the projection area of each gasket assembly (104) arranged along the center of the iron core body (101) towards the first mounting part (111) or the second mounting part (112) on the surface of the first supporting frame (102) or the second supporting frame (103) is reduced in sequence; the gasket assembly (104) is formed by laminating a plurality of gaskets with the same specification.

Still more preferably, the edges of the gasket assemblies (104) of the core body (101) on the same side of the channel (110) are all located in the same virtual cylinder B and are inscribed on the inner surface of the virtual cylinder B.

It is further preferred that the surface of the support member (105) remote from the ground is stepped to conform to the shape of the end of each pad member (104) adjacent the ground.

Still further preferably, the first support frame (102) includes a first upright post (1021), a second upright post (1022) and a first cross bar (1023), the first upright post (1021) and the second upright post (1022) both extend along the vertical direction and are arranged at intervals, the first cross bar (1023) is arranged between the first upright post (1021) and the second upright post (1022), and two ends of the first cross bar (1023) are respectively fixedly connected with the surfaces of the first upright post (1021) and the second upright post (1022); the surfaces of the first upright post (1021), the second upright post (1022) and the first cross bar (1023) are abutted against the surface of the first mounting part (111) of the iron core body (101); the first upright column (1021) is propped against the surface of the second limiting part (22); the second upright column (1022) is abutted and fixedly connected with the surface of the first limiting part (21).

Further preferably, the second support frame (103) includes a third upright post (1031), a fourth upright post (1032) and a second cross bar (1033), the third upright post (1031) and the fourth upright post (1032) both extend along the vertical direction and are arranged at intervals, the second cross bar (1033) is arranged between the third upright post (1031) and the fourth upright post (1032), and both ends of the second cross bar (1033) are respectively fixedly connected with the surfaces of the third upright post (1031) and the fourth upright post (1032); the surfaces of the third upright post (1031), the fourth upright post (1032) and the second cross bar (1033) are abutted against the surface of the second mounting part (112) of the iron core body (101); the first upright post (1021) is fixedly connected with the third upright post (1031), and the second upright post (1022) is fixedly connected with the fourth upright post (1032); the third upright post (1031) is also abutted against the surface of the first limiting part (21); the fourth upright post (1032) is also abutted and fixedly connected with the surface of the second limiting part (22).

Still further preferably, a horizontal kidney-shaped groove is formed in the first limiting portion (21), vertical kidney-shaped grooves are correspondingly formed in the second upright post (1022) and the third upright post (1031), and the horizontal kidney-shaped groove and the vertical kidney-shaped grooves are adjacent and are arranged in a crossed manner.

The utility model provides a pair of novel testing transformer for prior art, has following beneficial effect:

(1) the first limiting part and the second limiting part in the box body can symmetrically limit the positions of the end parts of the iron core units, so that the iron core units are prevented from rotating or moving up and down in the box body, the shapes of the iron core units are limited from the outside, and the iron core units and the coils are kept stable in the moving and carrying processes;

(2) the first supporting frame and the second supporting frame which are used for clamping the iron core body are symmetrically arranged on the two sides of the iron core body, so that the iron core body is prevented from being punched and fixed, burrs generated by punching can be avoided, and the influence of punching on magnetic flux can also be avoided;

(3) the iron core body is in a square shape, and the parts of the iron core body, which are positioned on the first supporting frame and the second supporting frame, can be used as winding core columns of the coil;

(4) the sections of all gasket assemblies of the iron core body of the winding core column of the transformer coil are similar to a cylinder, so that a larger sectional area of the core column can be obtained, a larger magnetic conduction area is provided, and the magnetic conduction effect is improved;

(5) the support assembly can better limit the distance between the first support frame and the second support frame from the inside, provides surface support for the iron core body and prevents each gasket assembly from being longitudinally displaced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a front view of a novel test transformer of the present invention;

fig. 2 is a top view of the novel test transformer with the cover and the high-voltage bushing removed;

fig. 3 is a top view of a box body of the novel testing transformer of the present invention;

fig. 4 is a left side view of the combined state of the iron core unit and the coil of the novel testing transformer of the present invention;

fig. 5 is a front view of an iron core unit of the novel testing transformer of the present invention;

fig. 6 is a left side view of the iron core unit of the novel testing transformer of the present invention;

fig. 7 is a top view of an iron core unit of the novel testing transformer of the present invention;

FIG. 8 is a cross-sectional view taken along line C-C of FIG. 5;

fig. 9 is a front view of an iron core body of the novel testing transformer of the present invention;

fig. 10 is a perspective view of the supporting component of the novel testing transformer of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

As shown in fig. 1 with fig. 2, fig. 3 and fig. 4, the technical solution of the present invention is implemented as follows: the utility model provides a novel testing transformer, include:

the transformer comprises an iron core unit 1 and a coil 5, wherein the iron core unit 1 generates a magnetic conduction effect and transmits a magnetic flux linkage, and the coil 5 is wound on the iron core unit 1 and is combined with the iron core unit 1 to boost the input voltage;

the box body 2 is hollow, one end of the box body 2 is opened, and the interior of the box body 2 is used for installing and fixing the iron core unit 1 and the coil 5;

the cover body 3 is used for sealing and protecting one open end of the box body 2 and providing a reliable working environment;

a high-voltage bushing 4 forming a high-voltage path for the coil 5 to output;

the cover body 3 is hermetically connected with the box body 2; a high-voltage bushing 4 and a plurality of input terminals are arranged on one side, away from the box body 2, of the cover body 3, the high-voltage bushing 4 is fixedly connected with the cover body 3, one end of the high-voltage bushing 4 extends into the box body 2 and is electrically connected with the output end of the coil 5, and the input terminals are electrically connected with the input end of the coil 5; a first limiting part 21 and a second limiting part 22 are arranged in the box body 2, the first limiting part 21 and the second limiting part 22 are both fixedly arranged on the inner surface of the box body 2, one end of the first limiting part 21 is fixedly connected with the side wall of the box body 2, and the other end of the first limiting part extends towards the direction vertical to the side wall of the box body 2; one end of the second limiting part 22 is fixedly connected with the inner surface of the non-open end of the box body 2, and the other end of the second limiting part 22 vertically extends upwards along the vertical direction; the first limiting portion 21 and the second limiting portion 22 respectively abut against the surface of the iron core unit 1, the first limiting portion 21 is further fixedly connected with the iron core unit 1, and the first limiting portion 21 and the second limiting portion 22 block the iron core unit 1 from moving relative to the box body 2.

The working principle of the test transformer is that input voltage is introduced into the input end of the coil 5 through the input terminal, a magnetic field is established through the iron core unit 1 according to the electromagnetic induction principle, high voltage is output at the output end of the coil 5 and is output outwards through the high-voltage bushing 4, and the purpose of power frequency test of power electrical equipment is achieved.

The utility model discloses a first spacing portion 21 is platelike, and the spacing portion 22 of second is the cuboid structure.

The structure of the core unit 1 will be further described with reference to fig. 5 to 10.

The core unit 1 includes a core body 101, a first support frame 102, a second support frame 103, and a support assembly 105; the iron core body 101 is provided with a first mounting part 111 and a second mounting part 112 which are oppositely arranged, the iron core body 101 is provided with a through channel 110, and two ends of the channel 110 are respectively communicated with the surfaces of the iron core body 101 at the first mounting part 111 and the second mounting part 112; the first support frame 102 and the second support frame 103 are arranged oppositely and at intervals; the iron core body 101 is arranged between the first supporting frame 102 and the second supporting frame 103, the surface of the first supporting frame 102 is abutted against the surface of the first mounting part 111, and the surface of the second supporting frame 103 is abutted against the surface of the second mounting part 112; the first support frame 102 and the second support frame 103 are fixedly connected to fix and clamp the iron core body 101; the supporting component 105 is positioned between the first supporting frame 102 and the second supporting frame 103, and the supporting component 105 is fixedly connected with the first supporting frame 102 and the second supporting frame 103 respectively; the surface of the end of the supporting component 105 far away from the ground is also abutted against the surface of the iron core body 101; the first support frame 102 and the second support frame 103 are both abutted against the first stopper portion 21 and the second stopper portion 22. The horizontal part of the iron core body 101 clamped between the first supporting frame 102 and the second supporting frame 103 can be used as a core column of a winding of a transformer coil, and the iron core body 101 does not need to be fixed through an additional opening, so that the structural integrity of the iron core body 101 can be ensured, and the iron loss and the heat generation are reduced.

As shown in fig. 8, the core body 101 includes a plurality of spacer assemblies 104, and each adjacent spacer assembly 104 is abutted against each other and disposed between the first support frame 102 and the second support frame 103 in parallel and in a stacked manner; the outer surfaces of the gasket assemblies 104 at the two outermost ends of the core body 101 are respectively provided with a first mounting part 111 and a second mounting part 112; each gasket assembly 104 is provided with a through hole 1040, and the through holes 1040 on each adjacent gasket assembly 104 are communicated in sequence to form a channel 110; the projection area of each gasket assembly 104 arranged along the center of the core body 101 in the direction of the first mounting part 111 or the second mounting part 112 on the surface of the first support frame 102 or the second support frame 103 is reduced in sequence; the gasket assembly 104 is formed by stacking a plurality of gaskets of the same specification. The cross section of the iron core body 101 is approximate to the cross section of the virtual cylinder B, and a better magnetic conduction effect can be obtained.

The edges of the shim assemblies 104 of the core body 101 on the same side of the channel 110 are all located in the same virtual cylinder B and are inscribed on the inner surface of the virtual cylinder B. The virtual cylinder B also serves as an inscribed cylinder for the windings of the coil 5.

The surface of support member 105 distal from the ground surface is stepped to conform to the shape of the ground-facing end of each pad member 104. The supporting member 105 supports the lower surface of the core body 101, and prevents the movement of each gasket member 104 when the transformer is transported.

As shown in fig. 3 with reference to fig. 6 and 7, the first support frame 102 includes a first upright 1021, a second upright 1022, and a first cross bar 1023, wherein the first upright 1021 and the second upright 1022 both extend along the vertical direction and are disposed at intervals, the first cross bar 1023 is disposed between the first upright 1021 and the second upright 1022, and both ends of the first cross bar 1023 are fixedly connected with the surfaces of the first upright 1021 and the second upright 1022 respectively; the surfaces of the first upright 1021, the second upright 1022 and the first cross bar 1023 all abut against the surface of the first mounting part 111 of the iron core body 101; the first upright 1021 is abutted against the surface of the second limiting part 22; the second upright 1022 is abutted and fixedly connected to the surface of the first position-limiting portion 21. As shown in the cross section a-a of fig. 3, the first position-limiting portion 21 is provided with a horizontal kidney-shaped groove, the second upright 1022 and the third upright 1031 are correspondingly provided with vertical kidney-shaped grooves, and the horizontal kidney-shaped groove and the vertical kidney-shaped grooves are adjacent and cross. The iron core body 101 can be fixed in the box body 2 by locking the horizontal kidney-shaped groove and the vertical kidney-shaped groove at the same time.

Similarly, the second support frame 103 includes a third upright 1031, a fourth upright 1032 and a second cross bar 1033, the third upright 1031 and the fourth upright 1032 both extend along the vertical direction and are arranged at intervals, the second cross bar 1033 is arranged between the third upright 1031 and the fourth upright 1032, and both ends of the second cross bar 1033 are respectively fixedly connected with the surfaces of the third upright 1031 and the fourth upright 1032; the surfaces of the third upright 1031, the fourth upright 1032 and the second crossbar 1033 all abut against the surface of the second mounting portion 112 of the core body 101; first upright 1021 is fastened with third upright 1031, and second upright 1022 is fastened with fourth upright 1032; the third upright 1031 further abuts against the surface of the first limiting portion 21; the fourth pillar 1032 is also abutted against and fixedly connected to the surface of the second position-limiting portion 22. First upright 1021, second upright 1022, third upright 1031, and fourth upright 1032 are all illustrated as L-shaped in transverse cross-section.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel test transformer comprises an iron core unit (1), a box body (2), a cover body (3), a high-voltage sleeve (4) and a coil (5), wherein the box body (2) is hollow, one end of the box body is open, the iron core unit (1) and the coil (5) are arranged in the box body (2), and the coil (5) is wound on the iron core unit (1); a cover body (3) is arranged at one open end of the box body (2), and the cover body (3) is hermetically connected with the box body (2); a high-voltage bushing (4) and a plurality of input terminals are arranged on one side, away from the box body (2), of the cover body (3), the high-voltage bushing (4) is fixedly connected with the cover body (3), one end of the high-voltage bushing (4) extends into the box body (2) and is electrically connected with the output end of the coil (5), and the input terminals are electrically connected with the input end of the coil (5); the method is characterized in that: a first limiting part (21) and a second limiting part (22) are arranged in the box body (2), the first limiting part (21) and the second limiting part (22) are fixedly arranged on the inner surface of the box body (2), one end of the first limiting part (21) is fixedly connected with the side wall of the box body (2), and the other end of the first limiting part extends towards the direction vertical to the side wall of the box body (2); one end of the second limiting part (22) is fixedly connected with the inner surface of the non-open end of the box body (2), and the other end of the second limiting part (22) vertically extends upwards along the vertical direction; the first limiting part (21) and the second limiting part (22) are respectively abutted to the surface of the iron core unit (1), the first limiting part (21) is further fixedly connected with the iron core unit (1), and the first limiting part (21) and the second limiting part (22) block the iron core unit (1) from moving relative to the box body (2).

2. A novel test transformer as claimed in claim 1, wherein: the first limiting part (21) is plate-shaped, and the second limiting part (22) is of a cuboid structure.

3. A novel test transformer as claimed in claim 2, wherein: the iron core unit (1) comprises an iron core body (101), a first supporting frame (102), a second supporting frame (103) and a supporting assembly (105); the iron core body (101) is provided with a first mounting part (111) and a second mounting part (112) which are oppositely arranged, the iron core body (101) is provided with a through channel (110), and two ends of the channel (110) are respectively communicated with the surfaces of the iron core body (101) at the first mounting part (111) and the second mounting part (112); the first supporting frame (102) and the second supporting frame (103) are arranged oppositely and at intervals; the iron core body (101) is arranged between the first supporting frame (102) and the second supporting frame (103), the surface of the first supporting frame (102) is abutted against the surface of the first mounting part (111), and the surface of the second supporting frame (103) is abutted against the surface of the second mounting part (112); the first supporting frame (102) is fixedly connected with the second supporting frame (103) to fix and clamp the iron core body (101); the supporting component (105) is positioned between the first supporting frame (102) and the second supporting frame (103), and the supporting component (105) is fixedly connected with the first supporting frame (102) and the second supporting frame (103) respectively; the surface of one end of the supporting component (105) far away from the ground is also propped against the surface of the iron core body (101); the first supporting frame (102) and the second supporting frame (103) are respectively abutted against the first limiting part (21) and the second limiting part (22).

4. A novel test transformer as claimed in claim 3, characterized in that: the iron core body (101) comprises a plurality of gasket assemblies (104), and each adjacent gasket assembly (104) is abutted against each other and arranged between the first supporting frame (102) and the second supporting frame (103) in a parallel stacking mode; the outer surfaces of the gasket assemblies (104) at the two outermost ends of the iron core body (101) are respectively provided with a first mounting part (111) and a second mounting part (112); each gasket assembly (104) is provided with a through hole (1040), and the through holes (1040) on each adjacent gasket assembly (104) are communicated in sequence to form a channel (110); the projection area of each gasket assembly (104) arranged along the center of the iron core body (101) towards the first mounting part (111) or the second mounting part (112) on the surface of the first supporting frame (102) or the second supporting frame (103) is reduced in sequence; the gasket assembly (104) is formed by laminating a plurality of gaskets with the same specification.

5. A novel test transformer as claimed in claim 4, characterized in that: the edges of all the gasket assemblies (104) of the iron core body (101) in the same side direction of the channel (110) are all positioned in the same virtual cylinder B and are inscribed on the inner surface of the virtual cylinder B.

6. A novel test transformer as claimed in claim 3, characterized in that: the surface of one end, far away from the ground, of the support component (105) is in a step shape, and the step shape surface is matched with the shape of one end, close to the ground, of each gasket component (104).

7. A novel test transformer as claimed in claim 3, characterized in that: the first supporting frame (102) comprises a first upright post (1021), a second upright post (1022) and a first cross bar (1023), the first upright post (1021) and the second upright post (1022) extend along the vertical direction and are arranged at intervals, the first cross bar (1023) is arranged between the first upright post (1021) and the second upright post (1022), and two ends of the first cross bar (1023) are fixedly connected with the surfaces of the first upright post (1021) and the second upright post (1022) respectively; the surfaces of the first upright post (1021), the second upright post (1022) and the first cross bar (1023) are abutted against the surface of the first mounting part (111) of the iron core body (101); the first upright column (1021) is propped against the surface of the second limiting part (22); the second upright column (1022) is abutted and fixedly connected with the surface of the first limiting part (21).

8. A novel test transformer as claimed in claim 7, wherein: the second supporting frame (103) comprises a third upright post (1031), a fourth upright post (1032) and a second cross bar (1033), the third upright post (1031) and the fourth upright post (1032) extend along the vertical direction and are arranged at intervals, the second cross bar (1033) is arranged between the third upright post (1031) and the fourth upright post (1032), and two ends of the second cross bar (1033) are respectively fixedly connected with the surfaces of the third upright post (1031) and the fourth upright post (1032); the surfaces of the third upright post (1031), the fourth upright post (1032) and the second cross bar (1033) are abutted against the surface of the second mounting part (112) of the iron core body (101); the first upright post (1021) is fixedly connected with the third upright post (1031), and the second upright post (1022) is fixedly connected with the fourth upright post (1032); the third upright post (1031) is also abutted against the surface of the first limiting part (21); the fourth upright post (1032) is also abutted and fixedly connected with the surface of the second limiting part (22).