Host for direct-current off-line insulation monitoring device

Abstract

The utility model discloses a host for a direct current offline insulation monitoring device, which comprises a box body, a detection circuit module is arranged in the box body, the detection circuit module comprises a positioning plate, the positioning plate is fixedly connected with the bottom in the box body, one side of the positioning plate is provided with an offline back plate, and the positioning plate is fixedly connected with a power panel, a relay panel and a CPU (Central Processing Unit) panel in sequence; a filter, a power supply and a plurality of electric connectors are arranged on the box body, the electric connectors are connected with the filter, the filter is connected with the power supply, the power supply is connected with the off-line backboard, the off-line backboard is electrically connected with the CPU board, the relay board and the power board, and the power board supplies power to the CPU board and the relay board. The host for the DC offline insulation monitoring device provided by the utility model can enhance the anti-interference capability of equipment, is convenient to maintain and debug, and avoids electromagnetic interference.

Description

Technical Field

[0001] The utility model relates to the technical field of direct current system protection, in particular to a host computer for a direct current off-line insulation monitoring device. Background Art

[0002] The DC offline insulation monitoring device is a device specially used to monitor the insulation status of the busbar and branch of the DC power supply system. It can detect the insulation status in real time, timely detect and automatically send out light and sound signals, etc. When the insulation resistance of any pole decreases, the device can also determine the insulation resistance value of the grounding pole and the positive and negative poles. In the field of ship technology, due to the complexity and particularity of the ship's power system, there is a very high demand for the insulation performance of the DC power supply system. The DC offline insulation monitoring device is one of the important equipment to ensure the safe and stable operation of the ship's power system. It provides important decision-making support and safety guarantees for the crew by real-time monitoring and fault diagnosis of the insulation performance of the DC power supply system.

[0003] The internal layout of the existing host for DC offline insulation monitoring devices has not been carefully planned, which may affect the creepage distance and electrical clearance of the medium voltage system, which is related to the safe operation of the equipment. The unreasonable layout of strong and weak electricity may cause electromagnetic interference and affect the stability of the system. Utility Model Content

[0004] In view of the above-mentioned deficiencies of the current DC offline insulation monitoring device, the utility model provides a host for a DC offline insulation monitoring device, which can enhance the anti-interference ability of the equipment, facilitate maintenance and debugging, and avoid electromagnetic interference.

[0005] In order to achieve the above object, the embodiment of the utility model adopts the following technical solution:

[0006] A host for a DC offline insulation monitoring device comprises a box body, wherein a detection circuit module is arranged in the box body, wherein the detection circuit module comprises a positioning plate, wherein the positioning plate is fixedly connected to the bottom of the box body, wherein an offline backplane is arranged on one side of the positioning plate, wherein a power supply board, a relay board and a CPU board are fixedly connected in sequence to the positioning plate; wherein a filter, a power supply and a plurality of electrical connectors are arranged on the box body, wherein the electrical connector is connected to the filter, wherein the filter is connected to the power supply, wherein the power supply is connected to the offline backplane, wherein the offline backplane is electrically connected to the CPU board, the relay board and the power supply board respectively, wherein the power supply board supplies power to the CPU board and the relay board.

[0007] According to one aspect of the utility model, the box body is also provided with a display light, a switch, a fuse, a ground terminal and a plurality of stuffing boxes, and the display light, switch, fuse, ground terminal, stuffing box and electrical connector are all arranged on the same side of the box body.

[0008] According to one aspect of the present invention, the filter is electrically connected to the switch, the switch is electrically connected to the display light, and the display light is connected to the power supply.

[0009] According to one aspect of the utility model, the filter and the power supply are arranged on the back side of the box.

[0010] According to one aspect of the utility model, the power supply is provided with a fixing member near the inner side of the box body.

[0011] According to one aspect of the utility model, a wire rope shock absorber is provided at the bottom of the box body, and the wire rope shock absorber is respectively placed on both sides of the bottom of the box body.

[0012] According to one aspect of the utility model, a cover plate is provided on the top of the box body, a door support is provided between the cover plate and the box body, captive screws are provided on the cover plate, and the cover plate is connected to the box body via the captive screws.

[0013] According to one aspect of the present invention, the electrical connector includes a 2-core electrical connector, a 5-core electrical connector, a 7-core electrical connector, a 10-core electrical connector and a 14-core electrical connector.

[0014] Advantages of the implementation of the utility model: The utility model provides a host for a DC offline insulation monitoring device, including a box body, a detection circuit module is arranged in the box body, the detection circuit module includes a positioning plate, the positioning plate is fixedly connected to the bottom of the box body, an offline backplane is arranged on one side of the positioning plate, a power board, a relay board and a CPU board are fixedly connected to the positioning plate in sequence, the power board, the relay board, the CPU board and the offline backplane can be independently maintained, replaced and upgraded, thus reducing maintenance costs and ensuring the overall reliability of the system; through the functional modularization and position layout of the internal parts of the box body, the creepage distance and electrical clearance of the medium voltage system can be met, the anti-interference ability of the equipment can be enhanced, maintenance and debugging are convenient, weak current and strong current can be effectively separated, and electromagnetic interference can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a schematic diagram of the appearance of a host for a DC off-line insulation monitoring device according to the utility model;

[0017] Figure 2It is a left view of the host described in the utility model;

[0018] Figure 3 for Figure 2 Sectional view at AA in the middle;

[0019] Figure 4 It is a structural explosion diagram of the host computer used for the DC offline insulation monitoring device described in the utility model;

[0020] In the figure: 1. Captive screws; 2. Filter; 3. Power supply; 4. Fixing parts; 5. CPU board; 6. Relay board; 7. Power board; 8. Off-line backplane; 9. Box; 10. Wire rope shock absorber; 11. Electrical connector; 12. Indicator light; 13. Fuse; 14. Stuffing box; 15. Switch; 16. Grounding terminal; 17. Door support; 18. Cover plate. DETAILED DESCRIPTION

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a host for a DC off-line insulation monitoring device includes a box 9 in which a detection circuit module is arranged.

[0025] The detection circuit module includes a positioning plate, which is fixedly connected to the bottom of the box 9. An offline backplane 8 is provided on one side of the positioning plate, and a power supply board 7, a relay board 6 and a CPU board 5 are fixedly connected to the positioning plate in sequence; a filter 2, a power supply 3 and several electrical connectors 11 are provided on the box 9, and the electrical connector 11 is connected to the filter 2, the filter 2 is connected to the power supply 3, the power supply 3 is connected to the offline backplane 8, the offline backplane 8 is electrically connected to the CPU board 5, the relay board 6 and the power supply board 7 respectively, and the power supply board 7 supplies power to the CPU board 5 and the relay board 6. The power supply 3 is provided with a fixing part 4 near the inner side of the box 9 to optimize the space utilization in the box 9. Through a compact and orderly layout, more modules and functions can be installed in a limited space to improve the integration of the equipment.

[0026] In actual application, the box body 9 is also provided with a display light 12, a switch 15, a fuse 13, a ground terminal 16 and a plurality of stuffing boxes 14. The display light 12, the switch 15, the fuse 13, the ground terminal 16, the stuffing box 14 and the electrical connector 11 are all arranged on the same side of the box body 9.

[0027] In this embodiment, the display light 12 is a ball head display light, which has a spherical appearance design, making the light more focused and eye-catching, and can provide a clear warning effect in a specific environment. In this embodiment, there are 6 stuffing boxes 14, which are mainly used to lock the cable on the box body 9 to prevent the cable from leaking electricity and ensure safe operation after the electrical power is turned on.

[0028] By dividing the detection circuit modules in the box 9, the impact of a single failure on the entire system is reduced. The power board 7, relay board 6, CPU board 5 and offline backplane 8 can be independently maintained, replaced and upgraded, reducing maintenance costs and ensuring the overall reliability of the system.

[0029] In practical applications, the filter 2 is electrically connected to the switch 15 , the switch 15 is electrically connected to the display light 12 , the display light 12 is connected to the power source 3 , and both the filter 2 and the power source 3 are disposed on the back of the box 9 .

[0030] In practical applications, a wire rope shock absorber 10 is provided at the bottom of the box 9, and the wire rope shock absorber 10 is respectively placed on both sides of the bottom of the box 9. The wire rope shock absorber 10 is a shock absorbing device that uses a wire rope as an elastic body, and is formed by a multi-strand stainless steel wire rope wound around two upper and lower clamping plates and then fixed. Vibration isolation, shock absorption and impact suppression are achieved through the deformation of the wire rope. When subjected to external vibration or impact, the wire rope will bend and stretch to absorb and consume vibration energy, thereby reducing the vibration and impact transmitted to the equipment or structure, and can effectively absorb and consume the vibration energy of the system, and reduce the dynamic response of the equipment or structure under external excitation.

[0031] A cover plate 18 is provided on the top of the box body 9, a door support 17 is provided between the cover plate 18 and the box body 9, a captive screw 1 is provided on the cover plate 18, and the cover plate 18 is connected to the box body 9 through the captive screw 1. The captive screw 1 is a specially designed screw, which is fixed on the cover plate 18 by means of pressure riveting or expansion riveting, and the position of the cover plate 18 and the box body 9 is fastened by the screw. After the riveting installation, this screw can be screwed in and out at will, and is firm and not easy to fall off. It can be tightened and loosened directly by hand without using any tools, which further improves the convenience of use.

[0032] The electrical connector 11 includes a 2-core electrical connector, a 5-core electrical connector, a 7-core electrical connector, a 10-core electrical connector and a 14-core electrical connector. By installing electrical connectors 11 with different numbers of cores, electrical connection requirements from simple to complex can be met to ensure the normal operation of the equipment.

[0033] The working principle of this device is: connect AC220V alternating current to the electrical connector (which electrical connector is connected depends on the actual work needs), the electrical connector is connected to the filter, the filter is connected to the switch, the switch is connected to the power supply after the display light is connected in parallel, the power supply is connected to the offline backplane, the offline backplane is connected to the CPU board, the relay board and the power board, and the power board supplies power to the CPU board and the relay board. The CPU board controls the relay board to inject the measurement signal, and the measurement signal of the power board is connected to the stuffing box respectively. By modularizing the functions and arranging the positions in this way, the creepage distance and electrical clearance of the medium voltage system can be met, the anti-interference ability of the equipment can be enhanced, maintenance and debugging can be facilitated, and weak and strong currents can be effectively separated to avoid electromagnetic interference.

[0034] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. A host for a DC off-line insulation monitoring device, comprising a box (9), wherein a detection circuit module is arranged in the box (9), characterized in that: The detection circuit module comprises a positioning plate, the positioning plate is fixedly connected to the bottom of the box (9), an offline backplane (8) is provided on one side of the positioning plate, and a power supply board (7), a relay board (6) and a CPU board (5) are fixedly connected to the positioning plate in sequence; a filter (2), a power supply (3) and a plurality of electrical connectors (11) are provided on the box (9), the electrical connector (11) is connected to the filter (2), the filter (2) is connected to the power supply (3), the power supply (3) is connected to the offline backplane (8), the offline backplane (8) is electrically connected to the CPU board (5), the relay board (6) and the power supply board (7) respectively, and the power supply board (7) supplies power to the CPU board (5) and the relay board (6).

2. The host for the DC off-line insulation monitoring device according to claim 1, characterized in that: The box body (9) is also provided with a display light (12), a switch (15), a fuse (13), a grounding terminal (16) and a plurality of stuffing boxes (14); the display light (12), the switch (15), the fuse (13), the grounding terminal (16), the stuffing box (14) and the electrical connector (11) are all arranged on the same side of the box body (9).

3. The host for the DC off-line insulation monitoring device according to claim 2, characterized in that: The filter (2) is electrically connected to the switch (15), the switch (15) is electrically connected to the display light (12), and the display light (12) is connected to the power source (3).

4. The host for the DC off-line insulation monitoring device according to claim 1, characterized in that: The filter (2) and the power supply (3) are arranged on the back side of the box (9).

5. The host for the DC off-line insulation monitoring device according to claim 1, characterized in that: The power source (3) is provided with a fixing member (4) at the inner side close to the box body (9).

6. The host for the DC off-line insulation monitoring device according to claim 1, characterized in that: A wire rope shock absorber (10) is provided at the bottom of the box body (9), and the wire rope shock absorber (10) is respectively placed on both sides of the bottom of the box body (9).

7. The host for the DC off-line insulation monitoring device according to claim 1, characterized in that: A cover plate (18) is provided on the top of the box body (9), a door support (17) is provided between the cover plate (18) and the box body (9), captive screws (1) are provided on the cover plate (18), and the cover plate (18) is connected to the box body (9) via the captive screws (1).

8. The host for the DC off-line insulation monitoring device according to claim 1, characterized in that: The electrical connector (11) comprises a 2-core electrical connector, a 5-core electrical connector, a 7-core electrical connector, a 10-core electrical connector and a 14-core electrical connector.

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