Low-voltage dry-type conducting bar

Abstract

The utility model discloses a low-voltage dry-type conducting bar, and belongs to the field of power transmission and transformation accessories. The low-voltage dry-type conducting bar comprises a plate-shaped conductor and further comprises an upper insulation sleeve and a lower insulation sleeve, the upper insulation sleeve and the lower insulation sleeve are arranged in the middle of the plate-shaped conductor in a sleeved mode respectively, and the upper insulation sleeve and the lower insulation sleeve are fixedly connected. And an upper sealing gasket sleeved on the outer side of the plate-shaped conductor is arranged between the upper insulating sleeve and the lower insulating sleeve. The insulating sleeves and the plate-shaped conductor adopt an assembly structure, and the upper insulating sleeve, the lower insulating sleeve and the plate-shaped conductor are sealed by the sealing gaskets, so that the problems of cracking and oil leakage of the insulating sleeve which is integrally poured by epoxy resin are solved, and the conducting bar of the transformer is simple and compact in structure and convenient to manufacture; compared with a transformer bushing adopting a conducting rod, the conducting bar has the advantages that the skin effect is small, the copper consumption of the conducting bar is small under the same current-carrying capacity, and the overall cost is reduced.

Description

Technical Field

[0001] The utility model relates to a power transmission and transformation accessory, more specifically, to a low-voltage dry-type conductive bar. Background Art

[0002] Compared with the transformer bushing using conductive rods, the conductive part of the conductive bar is a flat structure, and the skin effect is smaller than that of the conductive rod. Therefore, under the same conductive cross-section, the current carrying capacity of the conductive bar is stronger.

[0003] The insulator of the existing conductive bar is an epoxy resin casting structure, such as the patent application of China Patent No. ZL95214632.0, the authorization announcement date is April 9, 1997, and the utility model name is "Transformer Conductive Bar". In this patent, an epoxy resin insulation sleeve is cast in the middle of the copper bar to form a conductive bar suitable for low-voltage, high-current rectifier transformers and special transformers. This conductive bar has a simple structure and is easy to make, but because the copper bar will heat up during the conduction process, it is easy to cause the outer epoxy resin insulation sleeve to crack, and then cause oil leakage and other problems.

[0004] The Chinese patent number is ZL201020261435.9, and the authorization announcement date is January 19, 2011. The utility model name is "Transformer Conductive Bar with Cooling System". In order to prevent the epoxy resin insulation sleeve from cracking, a cooling water pipe is welded on the conductive bar above the epoxy resin insulation sleeve, and the conductive bar is cooled by the cooling water pipe. Although this method can prevent the epoxy resin insulation sleeve from cracking by reducing the temperature of the conductive bar, it makes the structure of the conductive bar more complicated and also brings new problems of cooling water pipe and cooling water conductivity. Summary of the invention

[0005] 1. Technical problems to be solved by the utility model

[0006] The utility model aims to overcome the above-mentioned problems existing in the existing transformer conductive bar and provide a low-voltage dry conductive bar. By adopting the technical solution of the utility model, the insulating sleeve and the plate-shaped conductor adopt an assembly structure, and the upper and lower insulating sleeves and the plate-shaped conductor are sealed with a sealing gasket, thereby solving the problem of cracking and oil leakage of the epoxy resin integrally cast insulating sleeve, and the transformer conductive bar has a simple and compact structure and is easy to manufacture; compared with the transformer bushing using a conductive rod, the conductive bar has a small skin effect, and under the same current-carrying capacity, the conductive bar uses less copper, thereby reducing the overall cost.

[0007] 2. Technical solution

[0008] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is:

[0009] The utility model discloses a low-voltage dry-type conductive bar, comprising a plate-shaped conductor, and also comprising an upper insulating sleeve and a lower insulating sleeve, wherein the upper insulating sleeve and the lower insulating sleeve are respectively sleeved on the middle part of the plate-shaped conductor, the upper insulating sleeve and the lower insulating sleeve are fixedly connected, and an upper sealing gasket sleeved on the outer side of the plate-shaped conductor is provided between the upper insulating sleeve and the lower insulating sleeve.

[0010] Furthermore, the upper insulating sleeve and the lower insulating sleeve are fixed by bonding or fixedly connected by fasteners.

[0011] Furthermore, the plate-shaped conductor is also provided with positioning pins for limiting the upper insulating sleeve and the lower insulating sleeve.

[0012] Furthermore, the lower insulating sleeve is fixed to the outside of the box body by installing fasteners, and a lower sealing gasket is provided between the lower end of the lower insulating sleeve and the outer wall of the box body.

[0013] Furthermore, a mounting step is provided at the lower portion of the lower insulating sleeve, and the mounting fastener is locked on the mounting step.

[0014] Furthermore, a tail sleeve capable of extending into the mounting hole of the box body is integrally provided at the lower portion of the lower insulating sleeve.

[0015] Furthermore, the box body is made of low-magnetic steel plate or non-magnetic steel plate.

[0016] Furthermore, a plurality of wiring holes are provided at both ends of the plate-shaped conductor.

[0017] 3. Beneficial effects

[0018] Compared with the existing known technologies, the technical solution provided by the utility model has the following beneficial effects:

[0019] (1) The utility model discloses a low-voltage dry-type conductive bar, comprising a plate-shaped conductor, an upper insulating sleeve and a lower insulating sleeve, wherein the upper insulating sleeve and the lower insulating sleeve are respectively sleeved on the middle part of the plate-shaped conductor, the upper insulating sleeve and the lower insulating sleeve are fixedly connected, and an upper sealing gasket sleeved on the outer side of the plate-shaped conductor is provided between the upper insulating sleeve and the lower insulating sleeve; the insulating sleeve and the plate-shaped conductor adopt an assembly structure, and the upper and lower insulating sleeves and the plate-shaped conductor are sealed with a sealing gasket, thereby solving the problem of cracking and oil leakage of the epoxy resin integrally cast insulating sleeve, and the structure of the transformer conductive bar is simple and compact, and the manufacturing is convenient; compared with the transformer bushing adopting the conductive rod, the conductive bar has a small skin effect, and under the same current carrying capacity, the conductive bar uses less copper, thereby reducing the overall cost;

[0020] (2) The utility model provides a low-voltage dry-type conductive bar, wherein the upper insulating sleeve and the lower insulating sleeve are bonded and fixed or connected by fasteners, and the assembly is simple and convenient;

[0021] (3) A low-voltage dry-type conductive bar of the utility model has a plate-shaped conductive body provided with positioning pins for limiting the upper insulating sleeve and the lower insulating sleeve, which can limit the axial movement of the upper and lower insulating sleeves on the conductive body, thereby improving the installation stability of the insulating sleeve on the conductive body;

[0022] (4) The utility model provides a low-voltage dry-type conductive bar, wherein the lower insulating sleeve is fixed to the outside of the box body by installing fasteners, and a lower sealing gasket is provided between the lower end of the lower insulating sleeve and the outer wall of the box body. The lower insulating sleeve is used to realize the installation of the entire conductive bar on the transformer, and the installation structure is simpler and the installation operation is convenient; the lower sealing gasket ensures the sealing between the conductive bar and the transformer box body;

[0023] (5) A low-voltage dry-type conductive bar of the utility model has a mounting step provided at the lower part of the lower insulating sleeve, and the mounting fastener is locked on the mounting step, so that the installation is more firm and reliable;

[0024] (6) A low-voltage dry-type conductive bar of the utility model has a tail sleeve integrally provided at the lower part of the lower insulating sleeve that can extend into the mounting hole of the box body. The tail sleeve can effectively separate the conductor from the transformer box body, thereby achieving reliable insulation between the conductor and the transformer box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of a low-voltage dry-type conductive bar of the utility model;

[0026] Figure 2 The utility model is a schematic diagram of a top view of a low-voltage dry conductive bar.

[0027] Explanation of the symbols in the schematic diagram:

[0028] 1. Plate-shaped conductor; 1-1. Wiring hole; 2. Upper insulating sleeve; 3. Lower insulating sleeve; 3-1. Tail sleeve; 3-2. Installation step; 4. Upper sealing gasket; 5. Lower sealing gasket; 6. Positioning pin; 7. Box body; 8. Installation fasteners; 9. Fasteners. DETAILED DESCRIPTION

[0029] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the drawings and embodiments.

[0030] [Example]

[0031] Combination Figure 1 and Figure 2As shown, a low-voltage dry-type conductive bar of this embodiment includes a plate-shaped conductor 1, an upper insulating sleeve 2 and a lower insulating sleeve 3. The plate-shaped conductor 1 is a flat structure and is generally made of a copper bar; the upper insulating sleeve 2 and the lower insulating sleeve 3 can be made of existing insulating materials, such as insulating ceramics, epoxy resin, nylon, etc. The upper insulating sleeve 2 and the lower insulating sleeve 3 are respectively sleeved on the middle part of the plate-shaped conductor 1, and the upper insulating sleeve 2 and the lower insulating sleeve 3 are fixedly connected. An upper sealing gasket 4 sleeved on the outer side of the plate-shaped conductor 1 is provided between the upper insulating sleeve 2 and the lower insulating sleeve 3. The upper sealing gasket 4 is a rubber sealing ring with elasticity. The upper insulating sleeve 2 and the lower insulating sleeve 3 clamp the upper sealing gasket 4. After being squeezed, the upper sealing gasket 4 can fit more closely on the outer wall of the plate-shaped conductor 1 to form a stable sealing effect. With the above structure, an assembly structure is adopted between the insulating sleeve and the conductor, and a sealing gasket is adopted to seal the upper and lower insulating sleeves and the conductor, thereby solving the problem of cracking and oil leakage of the epoxy resin integrally cast insulating sleeve, and the structure of the transformer conductive bar is simple and compact, and the manufacturing is convenient; compared with the transformer bushing adopting the conductive rod, the conductive bar has a small skin effect, and the current carrying capacity of the conductive bar is stronger under the same conductive cross-section; in other words, under the same current carrying capacity, the conductive bar uses less copper, thereby reducing the overall cost.

[0032] In this embodiment, the upper insulating sleeve 2 and the lower insulating sleeve 3 are fixed by bonding or fixedly connected by fasteners 9. When bonding is used, after the upper insulating sleeve 2 and the lower insulating sleeve 3 are assembled, an adhesive is injected or epoxy resin is poured between the two to achieve fixed connection. When fasteners are used for connection, bolt fasteners or lock fasteners can be used to fix the upper insulating sleeve 2 and the lower insulating sleeve 3 together. Figure 2 An implementation method of connecting the upper and lower insulating sleeves by using bolt fasteners is given in the figure. A plurality of connection holes are respectively provided on the upper insulating sleeve 2 and the lower insulating sleeve 3, and the upper and lower insulating sleeves can be locked by using bolts.

[0033] Reference Figure 1 As shown, in order to ensure the stability of the connection between the insulating sleeve and the conductor, a positioning pin 6 for limiting the upper insulating sleeve 2 and the lower insulating sleeve 3 is also provided on the plate-shaped conductor 1. The positioning pin 6 is provided on the upper side of the upper insulating sleeve 2 and the lower side of the lower insulating sleeve 3. The positioning pin 6 can limit the axial movement of the upper and lower insulating sleeves on the conductor, thereby improving the installation stability of the insulating sleeve on the conductor.

[0034] like Figure 1As shown, during the specific installation, the lower insulating sleeve 3 is fixed to the outside of the box body 7 by installing the fasteners 8, and a lower sealing gasket 5 is provided between the lower end of the lower insulating sleeve 3 and the outer wall of the box body 7. The lower insulating sleeve 3 is used to realize the installation of the entire conductive bar on the transformer, and the installation structure is simpler and the installation operation is convenient; the lower sealing gasket 5 ensures the sealing between the conductive bar and the transformer box body. A sealing ring installation groove may be provided at the lower portion of the lower insulating sleeve 3, and the lower sealing gasket 5 is arranged in the sealing ring installation groove. Furthermore, a mounting step 3-2 is also provided at the lower portion of the lower insulating sleeve 3, and the mounting fastener 8 is locked on the mounting step 3-2, so that the installation is more firm and reliable. Specifically, at least two screws (such as Figure 2 4 screws are shown in the figure), and a through hole is provided at the corresponding position of the installation step 3-2 of the lower insulating sleeve 3. When installing, the lower insulating sleeve 3 is aligned with the screw and then a nut is installed at the upper end of the screw, and the lower insulating sleeve 3 is locked on the box body 7 by the nut. In addition, a tail sleeve 3-1 that can be inserted into the installation hole of the box body 7 is also integrally provided at the lower part of the lower insulating sleeve 3. The tail sleeve 3-1 can effectively separate the conductor from the transformer box body, and realize reliable insulation between the conductor and the transformer box body. The above-mentioned box body 7 is preferably made of low-magnetic steel plate or non-magnetic steel plate, which can reduce the induction heating of the box body 7.

[0035] Similar to the existing transformer conductive bar, a plurality of wiring holes 1 - 1 are provided at both ends of the plate-shaped conductive body 1 to facilitate the connection between the conductive bar and the wire.

[0036] The utility model discloses a low-voltage dry-type conductive bar, in which the insulating sleeve and the plate-shaped conductor adopt an assembled structure, and the upper and lower insulating sleeves and the plate-shaped conductor are sealed with a sealing gasket, thereby solving the problem of cracking and oil leakage of the epoxy resin integrally cast insulating sleeve, and the structure of the transformer conductive bar is simple and compact, and the manufacturing is convenient; compared with the transformer bushing adopting the conductive rod, the conductive bar has a small skin effect, and under the same current carrying capacity, the conductive bar uses less copper, thereby reducing the overall cost.

[0037] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in the field are inspired by it and design structural methods and embodiments similar to the technical solution without creative design without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A low-voltage dry-type conductive bar, comprising a plate-shaped conductive body (1), characterized in that: The invention also comprises an upper insulating sleeve (2) and a lower insulating sleeve (3), wherein the upper insulating sleeve (2) and the lower insulating sleeve (3) are respectively sleeved on the middle part of the plate-shaped conductor (1), the upper insulating sleeve (2) and the lower insulating sleeve (3) are fixedly connected, and an upper sealing gasket (4) sleeved on the outer side of the plate-shaped conductor (1) is provided between the upper insulating sleeve (2) and the lower insulating sleeve (3).

2. The low-voltage dry-type conductive bar according to claim 1, characterized in that: The upper insulating sleeve (2) and the lower insulating sleeve (3) are fixed by bonding or fixedly connected by fasteners (9).

3. The low voltage dry conductive bar according to claim 1, characterized in that: The plate-shaped conductor (1) is also provided with positioning pins (6) for limiting the positions of the upper insulating sleeve (2) and the lower insulating sleeve (3).

4. The low-voltage dry-type conductive bar according to claim 1, characterized in that: The lower insulating sleeve (3) is fixed to the outside of the box body (7) by means of a mounting fastener (8), and a lower sealing gasket (5) is provided between the lower end of the lower insulating sleeve (3) and the outer wall of the box body (7).

5. The low voltage dry conductive bar according to claim 4, characterized in that: The lower portion of the lower insulating sleeve (3) is also provided with an installation step (3-2), and the installation fastener (8) is locked on the installation step (3-2).

6. The low voltage dry conductive bar according to claim 4, characterized in that: The lower portion of the lower insulating sleeve (3) is also integrally provided with a tail sleeve (3-1) capable of extending into the mounting hole of the box body (7).

7. The low voltage dry conductive bar according to claim 4, characterized in that: The box body (7) is made of a low-magnetic steel plate or a non-magnetic steel plate.

8. The low voltage dry conductive bar according to claim 1, characterized in that: A plurality of wiring holes (1-1) are also provided at both ends of the plate-shaped conductor (1).

Images