High-voltage relay box for direct-current off-line insulation monitoring device

Abstract

The utility model discloses a high voltage relay box used for a DC offline insulation monitoring device, comprising an upper cover and a lower shell detachably connected with the upper cover, the upper cover covers the lower shell to form an installation cavity, the installation cavity is internally provided with a plurality of high voltage vacuum relays and a plurality of wiring terminals connected with the high voltage vacuum relays, and the wiring terminals are connected with the high voltage vacuum relays. A plurality of first stuffing boxes used for being connected with measurement signal lines are asymmetrically arranged on the two sides of the lower shell, a second stuffing box used for being connected with control signal lines is arranged on one side of the lower shell, and a first installation plate, a second installation plate and a third installation plate are sequentially arranged at the bottom of the installation cavity from front to back. A plurality of uniformly distributed mounting seats are arranged on the first mounting plate and the third mounting plate, and a supporting piece is arranged at the lower end of the second mounting plate, so that the height of the second mounting plate is greater than that of the first mounting plate. According to the utility model, the creepage distance and the electrical clearance of a medium-voltage system can be satisfied, the anti-interference capability of equipment is enhanced, and maintenance and debugging are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of ship power distribution field, especially, a high voltage relay box for DC offline insulation monitoring device. BACKGROUND

[0002] DC insulation monitoring device is mainly used for power plant DC system, and the power supply network of the DC system is relatively complex, the distribution range is also relatively wide, and the opportunity of grounding is also more, and when one point grounding of the DC system occurs, the influence is not big, and the grounding can still continue. However, long-term existence of one point grounding is very dangerous, and if another point grounding occurs, the misoperation of signal loop, control loop, relay protection device and automatic device or the short circuit of DC power supply may be caused, and the high voltage relay box plays a role of injecting DC amplitude voltage measurement signal into offline DC bus in the DC insulation monitoring device, and is the key to guarantee the normal work of the DC insulation monitoring device.

[0003] The existing high voltage relay box is not reasonably arranged in position, and different functions are mixed with lines, and the different creeping distances and electrical clearances required by the measurement function and the control function are often ignored, so that the devices interfere with each other, the high voltage relay box is difficult to work normally, and the mixed lines are not convenient for maintenance and debugging. CONTENT OF THE UTILITY MODEL

[0004] In view of the above-mentioned defects of the existing high voltage relay, the utility model provides a high voltage relay box for DC offline insulation monitoring device, which can meet the requirements of the creeping distance and the electrical clearance of the measurement function and the control function, and enhance the anti-interference ability of the device, and is convenient for maintenance and debugging.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the utility model adopts the following technical scheme:

[0006] A high voltage relay box for DC offline insulation monitoring device, comprising an upper cover and a lower shell detachably connected with the upper cover, the upper cover covers the lower shell to form an installation cavity, a plurality of high voltage vacuum relays and a plurality of wiring terminals connected with the high voltage vacuum relays are arranged in the installation cavity, characterized in that a plurality of first packing glands for connecting measurement signal lines are arranged on the two sides of the lower shell, a second packing gland for connecting control signal lines is arranged on one side, a first mounting plate, a second mounting plate and a third mounting plate are arranged in the installation cavity from front to back, a plurality of mounting seats are arranged on the first mounting plate and the third mounting plate, a support is arranged at the lower end of the second mounting plate, so that the height of the second mounting plate is greater than the height of the first mounting plate.

[0007] According to one aspect of the utility model, the upper cover and the lower shell are made of insulating materials.

[0008] According to one aspect of the utility model, the wiring terminal includes a plurality of first wiring terminals connected with the measurement signal line and at least one second wiring terminal connected with the control signal line, the first wiring terminal is connected with the first filler core, and the second wiring terminal is connected with the second filler core

[0009] According to one aspect of the utility model, four corners of the bottom end of the lower shell are provided with mounting feet, and mounting holes are arranged on the mounting feet.

[0010] According to one aspect of the utility model, both sides of the wiring terminal are provided with fixing members, and the wiring terminal is fixed in the mounting cavity through the fixing members.

[0011] According to one aspect of the utility model, the wiring terminal includes a wiring board and an isolation board connected with the wiring board.

[0012] According to one aspect of the utility model, the wiring board and the isolation board are made of insulating materials.

[0013] According to one aspect of the utility model, the bottom of the mounting cavity is sequentially provided with a first mounting plate, a second mounting plate and a third mounting plate from front to back, the first mounting plate and the third mounting plate are provided with a plurality of mounting seats which are uniformly distributed, the wiring terminal is connected to the mounting seat, the second mounting plate is provided with a plurality of mounting holes which are uniformly distributed, and the high-voltage vacuum relay is connected to the mounting hole.

[0014] According to one aspect of the utility model, the mounting seat includes a plurality of first mounting seats for connecting the first wiring terminal and at least one second mounting seat for mounting the second wiring terminal, the third mounting plate is uniformly provided with a plurality of first mounting seats, one side of the first mounting plate is sequentially and spacedly arranged with a plurality of first mounting seats, and the other side of the first mounting plate is provided with the second mounting seat.

[0015] According to one aspect of the utility model, the interval distance between the second mounting seat and the first mounting seat is greater than the interval distance between the first mounting seats.

[0016] The utility model discloses the advantages of implementation are as follows: the measuring signal line and control signal line connecting area are spaced, satisfy different creeping distance and electrical clearance, the measuring signal line is accessed first filler, and the filler is connected to the terminal, and the terminal is connected to the high voltage relay, and the high voltage relay is connected to the terminal, and the terminal is connected to the filler of the other side, and the control signal line is accessed the filler, and the filler is connected to the terminal, and the terminal is connected to the high voltage vacuum relay, and the distance of the wire of each group connection in the installation cavity is spaced in the predetermined range, and is independent, and does not interfere with each other, and the terminal includes the terminal board and the isolation board connected with the terminal board, and the terminal board and the isolation board are all made of insulating material, and effectively prevent the wire creeping, and by improving the height of the second installation board, prevent the vacuum high voltage relay from being influenced by other electrical components, and effectively enhance the anti -interference ability of equipment. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiments will be briefly introduced as follows, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0018] Figure 1 It is the overall structure schematic diagram of the utility model;

[0019] Figure 2 It is the structure schematic diagram of the utility model dismantles the upper cover.

[0020] 1, upper cover, 2, lower shell, 3, high voltage vacuum relay, 4, terminal, 41, first terminal, 411, terminal board, 412, isolation board, 413, fixing piece, 42, second terminal, 42, second terminal, 5, first filler, 6, second filler, 7, first installation plate, 8, second installation plate, 9, third installation plate, 10, mounting foot. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be clearly and completely described in the drawings of the embodiments of the utility model, obviously, the described embodiments are only some embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0022] Embodiment 1:

[0023] As 1 figure to Figure 2As shown, a high-voltage relay box for a DC offline insulation monitoring device includes an upper cover 1 and a lower shell 2 detachably connected to the upper cover 1, the upper cover 1 covers the lower shell 2 to form an installation cavity, and a plurality of high-voltage vacuum relays 3 and a plurality of wiring terminals 4 connected to the high-voltage vacuum relays 3 are provided in the installation cavity. It is characterized in that a plurality of first stuffing glands 5 for connecting measurement signal lines are asymmetrically provided on both sides of the lower shell 2, and a second stuffing gland 6 for connecting control signal lines is provided on one side, and a first mounting plate 7, a second mounting plate 8 and a third mounting plate 9 are provided in sequence at the bottom of the installation cavity from front to back, and a plurality of evenly distributed mounting seats are provided on the first mounting plate 7 and the third mounting plate 9, and a support member is provided at the lower end of the second mounting plate 8, so that the height of the second mounting plate 8 is greater than the height of the first mounting plate 7. When in use, the measurement signal line is connected to the first stuffing box 5, the stuffing box is connected to the terminal 4, the terminal 4 is connected to the high-voltage relay, the high-voltage relay is connected to the terminal 4, the terminal 4 is connected to the stuffing box on the other side, the control signal line is connected to the stuffing box, the stuffing box is connected to the terminal 4, and the terminal 4 is connected to the high-voltage vacuum relay 3. Each group of connected wires are spaced apart from each other within a predetermined range in the installation cavity, are independent of each other, and do not interfere with each other, thereby meeting the required creepage distance and electrical clearance, effectively enhancing the anti-interference ability of the equipment; by increasing the height of the second mounting plate 8, the vacuum high-voltage relay is prevented from being affected by other electrical components, effectively enhancing the anti-interference ability of the equipment.

[0024] In this embodiment, the upper cover 1 and the lower shell 2 are connected by threads.

[0025] In practical applications, the upper cover 1 and the lower shell 2 are both made of insulating materials.

[0026] In actual application, the terminal block 4 includes several first terminal blocks 41 connected to the measurement signal line and at least one second terminal block 42 connected to the control signal line. The first terminal block 41 is connected to the measurement stuffing box, and the second terminal block 42 is connected to the control stuffing box.

[0027] In practical applications, both the wiring board 411 and the isolation board 412 are made of insulating materials.

[0028] In this embodiment, the front side of the lower housing 2 is provided with a first stuffing box 5 and a second stuffing box 6, and the rear side is provided with a first stuffing box 5. The measurement signal line is connected to the first stuffing box 5, which is connected to the first terminal 41, which is connected to the high-voltage relay, which is connected to the first terminal 41 on the rear side, which is connected to the first stuffing box 5 on the rear side. The control signal line is connected to the second stuffing box 6, which is connected to the second terminal 42, which is connected to the high-voltage vacuum relay 3.

[0029] In practical application, the bottom end of the lower shell 2 is provided with mounting feet 10, mounting holes are arranged on the mounting feet 10, and the lower shell 2 is fixed on the mounting position through the mounting holes and screws. The installation is simple and convenient, and the fixing is reliable.

[0030] In practical application, the wiring terminal 4 is provided with fixing members 413 on two sides, and the wiring terminal 4 is fixed in the mounting cavity through the fixing members 413. The wiring terminal 4 is fixed firmly.

[0031] In practical application, the first wiring terminal 41 comprises a wiring plate 411 and an isolation plate 412 connected with the wiring plate 411, and the wiring plate 411 and the isolation plate 412 are made of insulating materials. The creeping of the wire is prevented.

[0032] In the example, the upper part of the wiring plate 411 is in a "T" shape, recesses are arranged on two sides of the upper part, and wiring holes are arranged at the bottom end of the recesses, and the wire joint is fixed at the wiring holes through screws.

[0033] In practical application, the wiring terminal 4 is connected on the mounting base, a plurality of mounting holes are arranged on the second mounting plate 8, and the high-voltage vacuum relay 3 is connected on the mounting holes.

[0034] In practical application, the interval distance between the second mounting base and the first mounting base is greater than the interval distance between the first mounting bases. The electrical clearance is better met, and the mutual interference is prevented.

[0035] The above is only a specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this. Any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A high-voltage relay box for a DC offline insulation monitoring device, comprising an upper cover (1) and a lower shell (2) detachably connected to the upper cover (1), wherein the upper cover (1) covers the lower shell (2) to form an installation cavity, wherein a plurality of high-voltage vacuum relays (3) and a plurality of connection terminals (4) connected to the high-voltage vacuum relays (3) are arranged in the installation cavity, characterized in that: A plurality of first stuffing boxes (5) for connecting measurement signal lines are asymmetrically arranged on both sides of the lower shell (2), and a second stuffing box (6) for connecting control signal lines is arranged on one side. A first mounting plate (7), a second mounting plate (8) and a third mounting plate (9) are sequentially arranged at the bottom of the mounting cavity from front to back. A plurality of evenly distributed mounting seats are arranged on the first mounting plate (7) and the third mounting plate (9). A support member is provided at the lower end of the second mounting plate (8), so that the height of the second mounting plate (8) is greater than that of the first mounting plate (7).

2. A high voltage relay box for a DC offline insulation monitoring device according to claim 1, characterized in that: The upper cover (1) and the lower shell (2) are both made of insulating material.

3. The high voltage relay box for a DC offline insulation monitoring device according to claim 1, characterized in that: The wiring terminal (4) comprises a plurality of first wiring terminals (41) connected to the measurement signal line and at least one second wiring terminal (42) connected to the control signal line, the first wiring terminal (41) being connected to the first stuffing box, and the second wiring terminal (42) being connected to the second stuffing box.

4. The high voltage relay box for a DC offline insulation monitoring device according to claim 1, characterized in that: The four corners of the bottom end of the lower shell (2) are provided with mounting feet (10), and the mounting feet (10) are provided with mounting holes.

5. The high voltage relay box for a DC offline insulation monitoring device according to claim 1, characterized in that: Fixing members (413) are provided on both sides of the connection terminal (4), and the connection terminal (4) is fixed in the installation cavity via the fixing members (413).

6. The high voltage relay box for a DC offline insulation monitoring device according to claim 1, characterized in that: The connection terminal (4) comprises a connection board (411) and an isolation board (412) connected to the connection board (411).

7. A high voltage relay box for a DC offline insulation monitoring device according to claim 6, characterized in that: The terminal board (411) and the isolation board (412) are both made of insulating materials.

8. A high voltage relay box for a DC offline insulation monitoring device according to any one of claims 1 to 7, characterized in that: The wiring terminal (4) is connected to the mounting seat, the second mounting plate (8) is provided with a plurality of evenly distributed mounting holes, and the high-voltage vacuum relay (3) is connected to the mounting holes.

9. A high voltage relay box for a DC offline insulation monitoring device according to claim 8, characterized in that: The mounting seat comprises a plurality of first mounting seats for connecting the first wiring terminal (41) and at least one second mounting seat for mounting the second wiring terminal (42); the plurality of first mounting seats are evenly distributed on the third mounting plate (9); the plurality of first mounting seats are sequentially arranged at intervals on one side of the first mounting plate (7); and the second mounting seat is provided on the other side of the first mounting plate (7).

10. A high voltage relay box for a DC offline insulation monitoring device according to claim 9, characterized in that: The spacing distance between the second mounting seat and the first mounting seat is greater than the spacing distance between the first mounting seats.

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