CN219800647U

CN219800647U - Voltage transformer with safety device

Info

Publication number: CN219800647U
Application number: CN202320518079.1U
Authority: CN
Inventors: 张训龙; 马红梅
Original assignee: Zhejiang Qianyuan Electrical Technology Co ltd
Current assignee: Zhejiang Qianyuan Electrical Technology Co ltd
Priority date: 2023-03-13
Filing date: 2023-03-13
Publication date: 2023-10-03
Anticipated expiration: 2033-03-13

Abstract

The utility model discloses a voltage transformer with a safety device, which relates to the field of voltage transformers, and comprises an iron core component and a casting body cast on the iron core component; the safety device also comprises an outer shell and a safety device arranged on the outer shell; the casting body and the iron core component are both positioned in the outer shell, a high-voltage terminal of the iron core component is connected with one end of the safety device, and the other end of the safety device is used for connecting a high-voltage line; the outer shell is provided with a plurality of high-voltage wiring perforations and a plurality of low-voltage wiring ports communicated with the low-voltage wiring ends of the iron core component. The utility model has the advantages that the pouring body and the safety device are arranged in the same outer shell, and a worker does not need to additionally install a fuse when in field installation, thereby having the effect of convenient field installation.

Description

Voltage transformer with safety device

Technical Field

The utility model relates to the field of voltage transformers, in particular to a voltage transformer with a safety device.

Background

The voltage transformer has the function of converting high voltage into low voltage for output, and is mainly used for supplying power to the measuring instrument and the relay protection device and measuring the voltage, the power and the electric energy of the line.

The voltage transformer generally comprises two terminal groups, wherein one group is used for connecting a high-voltage line and at least comprises three items a, b and c and a grounding end; the other group is used for outputting low-voltage signals. In order to protect the voltage transformer or connected detection equipment, a fuse is generally connected in series between the voltage transformer and the high-voltage line, and when the line is short-circuited or suddenly changed in voltage, the fuse can be fused to protect the iron core component of the voltage transformer and the external equipment.

In the actual field installation process, the voltage transformer is usually installed first, then the fuse is installed and connected with the voltage transformer, the installation is troublesome, and the improvement is still needed.

Disclosure of Invention

In order to facilitate field installation of the voltage transformer and the fuse, the utility model provides the voltage transformer with the safety device.

The utility model provides a voltage transformer with a safety device, which adopts the following technical scheme:

a voltage transformer with a safety device comprises an iron core component and a casting body cast on the iron core component; the safety device also comprises an outer shell and a safety device arranged on the outer shell; the casting body and the iron core component are both positioned in the outer shell, a high-voltage terminal of the iron core component is connected with one end of the safety device, and the other end of the safety device is used for being connected with a high-voltage line; the shell body is provided with a plurality of high-voltage wiring perforations and a plurality of low-voltage wiring ports communicated with the low-voltage wiring ends of the iron core component.

Through adopting above-mentioned technical scheme, install pouring body and safety device in same shell body, workman has the effect of easy to assemble when on-the-spot installation.

Optionally, the outer shell comprises a main shell, a middle partition plate and a cover plate; the middle partition plate divides the outer shell into a pouring area and a protection area, the pouring body is positioned in the pouring area, and the safety device is positioned in the protection area; the middle partition plate is provided with a communication hole through which a high-voltage wiring terminal passes, and the cover plate is detachably connected with the main shell.

Through adopting above-mentioned technical scheme, separate through the intermediate baffle between safeties and the pouring body, the iron core subassembly of being convenient for can not cause the influence to the protection zone when pouring in the pouring zone. And the cover plate and the main shell are detachably connected, so that the later-stage safety device is convenient to replace.

Optionally, the high-voltage wire penetrating hole is located at one side of the outer case, the low-voltage wire port is located at the other side of the outer case, and the communication hole is located near the high-voltage wire penetrating hole.

By adopting the technical scheme, the high-voltage part and the low-voltage part are separated as far as possible, so that the safety is improved.

Optionally, a safety isolation plate is arranged between the high-voltage wiring perforation and one end of the safety device, which is used for connecting the high-voltage line.

Through adopting above-mentioned technical scheme, after the pouring is accomplished, because the safeties is used for connecting the one end and the high-voltage wiring perforation ratio of high-voltage circuit near, if high-voltage wiring perforation department pouring is not in place, high pressure probably appears causing the interference to the iron core subassembly, through increasing the security barrier after, has improved the security.

Optionally, the safety device comprises three fuses, the three fuses correspond to A, B, C of the iron core assembly one by one, and a separation plate is arranged between two adjacent fuses.

By adopting the technical scheme, the separation effect is achieved, and the safety is improved.

Optionally, a placing frame is arranged on the middle partition board, and a clamping piece for connecting the fuse is arranged in the placing frame.

Through adopting above-mentioned technical scheme, the joint installation of fuse of being convenient for and later replacement.

Optionally, a thickened boss corresponding to the placement frame is arranged on one side of the middle partition plate, which faces away from the placement frame.

By adopting the technical scheme, as the clamping piece is required to be installed at the part and the part is directly contacted with high current, the insulation protection at the part can be enhanced by the arrangement of the thickened boss, and the safety is improved.

Optionally, an annular placing groove is formed in the upper end of the main shell, and a sealing strip located at the annular placing groove is arranged between the upper end of the main shell and the cover plate.

By adopting the technical scheme, the sealing performance is enhanced, and the function of protecting the fuse is achieved.

Optionally, the outer shell further comprises a bottom plate, and the bottom plate is provided with an auxiliary positioning angle and a plurality of reinforcing columns inserted into the pouring area.

Through adopting above-mentioned technical scheme, when pouring, when the pouring body has not solidified yet, cover the bottom plate, thereby insert to the pouring body through the reinforcing column and realize the reinforcement. The auxiliary positioning angle plays a role of positioning the bottom plate.

In summary, the casting body and the safety device are concentrated together to be used as a product in a mode of adding the outer shell, so that the later outdoor installation is facilitated, the outer shell is divided into the casting area and the protection area, and the casting area is directly used for casting the iron core assembly, so that the installation steps are saved; the protection area is not influenced by casting, and the later replacement of the safety device can be realized.

Drawings

FIG. 1 is a schematic overall structure of a first embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of a partial structure according to a first embodiment of the present utility model;

FIG. 3 is a schematic exploded view of a partial structure of a first embodiment of the present utility model;

FIG. 4 is an exploded view of a part of the mechanism at a male joint in accordance with an embodiment of the present utility model;

fig. 5 is a schematic diagram of a partial structure of a second embodiment of the present utility model after the cover plate is hidden.

Reference numerals: 1. an outer housing; 2. an iron core assembly; 3. a safety device; 4. a low voltage wiring port; 5. high-voltage wire perforation; 6. a main housing; 7. a middle partition plate; 8. a bottom plate; 9. a cover plate; 10. a pouring area; 11. a protection zone; 12. auxiliary positioning angle; 13. a fuse; 14. a partition plate; 15. a communication hole; 16. a safety isolation plate; 17. placing a frame; 18. a clamping piece; 19. thickening the boss; 20. an annular placement groove; 21. a sealing strip; 22. reinforcing the column; 23. and a placement groove.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-5.

Implementing the following steps:

the embodiment of the utility model discloses a voltage transformer with a safety device, which comprises an outer shell 1, an iron core component 2 and a safety device 3, and is characterized in that referring to fig. 1 and 2. Wherein the core assembly 2 includes a high voltage terminal for connecting a high voltage line and a low voltage terminal for outputting a low voltage signal. Wherein the outer housing 1 is provided with a low voltage wiring terminal 4 for connecting the low voltage wiring terminal of the core assembly 2 in the length direction. The safety device 3 is connected in series between the high-voltage wire connection end and the high-voltage wire line of the iron core assembly 2, and the safety device 3 plays a role in protecting a voltage transformer and subsequent connecting equipment. The outer case 1 is provided with three high-voltage wire penetrating holes 5 in the longitudinal direction. The high-voltage wiring perforation 5 and the low-voltage wiring perforation 4 are positioned on two sides of the outer shell 1, and the high-voltage part and the low-voltage part are separated as far as possible, so that the safety is improved.

Referring to fig. 2 and 3, the outer casing 1 includes a main casing 6, an intermediate partition 7, a bottom plate 8, and a cover plate 9. The middle partition 7 is located in the middle of the main casing 6, one side of the middle partition 7 is a pouring area 10, and the other side of the middle partition 7 is a protection area 11.

Referring to fig. 2 and 3, the iron core assembly 2 is located in the casting area 10, and forms a casting body located in the outer shell 1 by casting, wherein the casting material can be insulating materials such as epoxy resin, and the like, and when casting, the epoxy resin is poured into the casting area 10 by heating, and the casting body is formed by solidifying the epoxy resin after the epoxy resin is cooled. Four auxiliary positioning angles 12 are arranged on the bottom plate 8, and when the bottom plate 8 is arranged on the main shell 6, the four auxiliary positioning angles 12 are limited with the inner side wall of the main shell 6 so as to play a role in positioning the bottom plate 8. Four reinforcing columns 22 are provided on the side of the base plate 8 facing the casting area 10. When the casting is performed, when the casting body is not solidified, the bottom plate 8 is covered, and the reinforcement is realized by inserting the reinforcement columns 22 into the casting body until the casting body is solidified.

Referring to fig. 2 and 3, the protection device is located in the protection area 11, and the protection device includes three fuses 13, the three fuses 13 are in one-to-one correspondence with A, B, C items of the iron core assembly 2, and a partition plate 14 is arranged between two adjacent fuses 13, so that a separation effect is achieved, and safety is improved.

Referring to fig. 3, the intermediate partition 7 is provided with a communication hole 15 through which the high voltage terminal of the core assembly 2 passes, and the high voltage terminal can be connected to one end of the fuse 13 through the communication hole 15, and the other end of the fuse 13 is connected to an external high voltage line through the high voltage terminal through hole 5. In the present embodiment, the communication hole 15 is provided near the high-voltage wiring perforation 5, isolating the high-voltage portion and the low-voltage portion as much as possible by a distance.

Referring to fig. 3, a safety isolation plate 16 is disposed between the high voltage wire through hole 5 and one end of the safety device 3 for connecting the high voltage wire, after the casting is completed, since one end of the fuse 13 for connecting the high voltage wire is relatively close to the high voltage wire through hole 5, if the casting is not in place at the high voltage wire through hole 5, high voltage may possibly occur to interfere with the iron core assembly 2, and after the safety isolation plate 16 is added, safety is improved.

Referring to fig. 4, a placement frame 17 is integrally formed on one side of the middle partition 7 facing the fuse 13, two placement frames 17 are corresponding to each fuse 13, and a clamping piece 18 for clamping the end of the fuse 13 can be fixedly connected to each placement frame 17 in a manner of gluing, clamping or screw fixing, so that the fuse 13 can be conveniently clamped and installed and replaced later.

Referring to fig. 2 and 4, a thickened boss 19 corresponding to the placement frame 17 is disposed on a side of the middle partition 7 facing away from the placement frame 17, and the portion is to be provided with the clamping member 18 and is in direct contact with high current, so that insulation protection at the portion can be enhanced by the thickened boss 19, and safety is improved.

Referring to fig. 3, a cover 9 is provided at the upper end of the main housing 6 and is detachably coupled by screw coupling. Facilitating the replacement of the fuse 13 by opening the cover 9 at a later stage.

Referring to fig. 3, an annular placing groove 20 is formed in the upper end of the main casing 6, a sealing strip 21 located at the annular placing groove 20 is arranged between the upper end of the main casing 6 and the cover plate 9, sealing performance is enhanced, and the function of protecting the fuse 13 is achieved.

The specific effects are as follows:

the iron core component 2 is directly cast into the casting area 10 in the outer shell 1 in a casting mode, the fuse 13 is installed in the protection area 11, and finally, the iron core component is sent to the site for installation in a modularized whole, so that the iron core component has the effect of being convenient for site installation. The safety device 3 and the pouring body are separated through the middle partition plate 7, so that the iron core assembly 2 can not influence the protection area 11 when pouring in the pouring area 10, and the cover plate 9 and the main shell 6 are detachably connected, so that the later-stage fuse 13 is convenient to replace.

Embodiment two:

referring to fig. 5, unlike the embodiment, the outer case 1 includes a main case 6, an intermediate partition 7, and a cover 9 (the cover 9 is hidden in fig. 5). The main housing 6 and the cover plate 9 are fixed by screw connection to achieve detachable connection. The intermediate screen 7 is formed integrally with the main housing 6 and has a casting zone 10 and a protective zone 11, wherein the casting zone 10 is used for placing the core assembly 2 and for post casting. The protection zone 11 includes three mounting slots 23, and one fuse 13 is mounted in each mounting slot 23. The middle partition plate 7 is provided with a communication hole 15 for the connecting wire to pass through.

In this embodiment, compared with the first embodiment, after the pouring area 10 is poured and the fuse 13 is installed, the cover plate 9 is directly covered for bolting, and the whole installation process is simpler and more convenient.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims

1. The voltage transformer with the safety device comprises an iron core component (2) and a casting body cast on the iron core component (2); the method is characterized in that: the safety device also comprises an outer shell (1) and a safety device (3) arranged on the outer shell (1); the casting body and the iron core assembly (2) are both positioned in the outer shell (1), a high-voltage terminal of the iron core assembly (2) is connected with one end of the safety device (3), and the other end of the safety device (3) is used for being connected with a high-voltage line; the outer shell (1) is provided with a plurality of high-voltage wiring perforations (5) and a plurality of low-voltage wiring ports (4) communicated with the low-voltage wiring of the iron core assembly (2).

2. The voltage transformer with safety device according to claim 1, wherein: the outer shell (1) comprises a main shell (6), a middle partition plate (7) and a cover plate (9); the middle partition plate (7) divides the outer shell (1) into a pouring area (10) and a protection area (11), the pouring body is positioned in the pouring area (10), and the safety device (3) is positioned in the protection area (11); the middle partition plate (7) is provided with a communication hole (15) through which a high-voltage wiring terminal passes, and the cover plate (9) is detachably connected with the main shell (6).

3. The voltage transformer with safety device according to claim 2, wherein: the high-voltage wiring perforation (5) is located on one side of the outer shell (1), the low-voltage wiring port (4) is located on the other side of the outer shell (1), and the communication hole (15) is arranged close to the high-voltage wiring perforation (5).

4. A voltage transformer with safety device according to claim 3, characterized in that: a safety isolation plate (16) is arranged between the high-voltage wiring perforation (5) and one end of the safety device (3) for connecting a high-voltage line.

5. The voltage transformer with safety device according to claim 2, wherein: the safety device (3) comprises three fuses (13), the three fuses (13) are in one-to-one correspondence with A, B, C items of the iron core assembly (2), and a separation plate (14) is arranged between two adjacent fuses (13).

6. The voltage transformer with safety device according to claim 5, wherein: the middle partition plate (7) is provided with a placing frame (17), and a clamping piece (18) for connecting the fuse (13) is arranged in the placing frame (17).

7. The voltage transformer with safety device according to claim 6, wherein: one side of the middle partition plate (7) opposite to the placement frame (17) is provided with a thickening boss (19) corresponding to the placement frame (17).

8. The voltage transformer with safety device according to claim 2, wherein: an annular placing groove (20) is formed in the upper end of the main shell (6), and a sealing strip (21) located at the annular placing groove (20) is arranged between the upper end of the main shell (6) and the cover plate (9).

9. The voltage transformer with safety device according to claim 2, wherein: the outer shell (1) further comprises a bottom plate (8), and an auxiliary positioning angle (12) and a plurality of reinforcing columns inserted into the pouring area (10) are arranged on the bottom plate (8).