Closed type transformer iron core grounding current monitoring device

Abstract

The utility model discloses a closed transformer iron core grounding current monitoring device, which belongs to the technical field of transformer grounding current monitoring and comprises a waterproof box, a current transformer is assembled on one side of the waterproof box, and two clamping blocks are assembled at the lower end of the current transformer. Two openings are formed in the lower end face of the waterproof box, a signal acquisition line interface and a power input interface are assembled at the two openings respectively, a signal acquisition board card is assembled in the waterproof box through a copper column, and a power input board card is assembled on one side of the signal acquisition board card. The closed type transformer iron core grounding current monitoring device has the advantages of being simple in structure, small in size and light in weight, reduces installation personnel cost, can be installed by one person, solves the actual installation problems that an existing device is large in size and large in weight at the same time, greatly improves the practicability of the device, adopts the waterproof box as a shell, and is convenient to install. The sealing performance of the signal acquisition board card can be effectively protected, and normal operation of the signal acquisition board card is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of transformer grounding current monitoring, and in particular relates to a closed transformer iron core grounding current monitoring device. Background Art

[0002] With the rapid development of the railway industry, especially the high-speed development of high-speed railway lines, the reliability of the traction power supply system is one of the factors to ensure the normal operation of the railway line, and the traction transformer is a substation equipment that converts the electric energy sent by the power transmission line into a voltage suitable for the locomotive and vehicle. It is very important. Under normal circumstances, the transformer core must be grounded, and there can only be one point of grounding. Due to the suspended position between the transformer core and the earth, there will be a grounding current. Under normal circumstances, this current value is very small. However, when a line fault or equipment failure occurs, the transformer core will be grounded at two or more points. At this time, a loop will be formed between the core and the earth, and the grounding current will increase many times. In the early stage of the fault, it is not easy to detect, and it is easy to cause local overheating of the core and damage the insulation, thus forming a more serious fault.

[0003] The existing transformer core grounding current monitoring device is bulky and heavy, and requires multiple people to operate and install, which greatly reduces the practicality of the monitoring equipment. Therefore, a closed transformer core grounding current monitoring device is proposed to solve the above problems. Utility Model Content

[0004] In view of one or more of the above defects or improvement needs in the prior art, the utility model provides a closed transformer core grounding current monitoring device, which has the advantages of simple structure, small size and light weight.

[0005] To achieve the above object, the utility model provides a closed transformer core grounding current monitoring device, comprising a waterproof box, a current transformer is installed on one side of the waterproof box, and two clamping blocks are installed at the lower end of the current transformer and the two clamping blocks are arranged in parallel;

[0006] The lower end surface of the waterproof box is provided with two openings, and the two openings are respectively equipped with a signal collection line interface and a power input interface;

[0007] A signal acquisition board is installed in the waterproof box through copper columns, and a power input board is installed on one side of the signal acquisition board. The power input board corresponds to the pins on one side of the signal acquisition board and is connected to the signal acquisition board through screws.

[0008] As a further improvement of the present invention, the two clamps are electrically connected to the current transformer, the current transformer is electrically connected to the signal acquisition board, and the signal acquisition line interface, the power input interface, the signal acquisition board, and the power input board are electrically connected.

[0009] As a further improvement of the utility model, a circular ring is provided on the upper end surface of the current transformer and an insulating sleeve is installed inside the circular ring.

[0010] As a further improvement of the utility model, a cover plate is assembled on one side of the waterproof box by screws.

[0011] As a further improvement of the present invention, the waterproof box and the current transformer are fixed by screws.

[0012] As a further improvement of the utility model, the two clamping blocks are connected and fixed to the current transformer bottom plate by screws.

[0013] In general, compared with the prior art, the above technical solutions conceived by the utility model have the following beneficial effects:

[0014] The closed transformer core grounding current monitoring device of the utility model reduces the installation personnel cost and can be installed by one person. At the same time, it solves the actual installation problem of the existing device being bulky and heavy, and greatly improves the practicality of the device. By adopting a waterproof box as the outer shell, the communication and power supply cables enter from the signal acquisition line interface and the power input interface at the bottom of the waterproof box shell, which can effectively protect the sealing of the signal acquisition board and ensure its normal operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall installation structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the overall installation structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the overall installation structure of the utility model.

[0018] In all the drawings, the same reference numerals represent the same technical features, specifically: 1. waterproof box; 2. insulating sleeve; 3. current transformer; 4. clamping block; 5. signal acquisition line interface; 6. power input interface; 7. signal acquisition board; 8. power input board. DETAILED DESCRIPTION

[0019] 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.

[0020] Example

[0021] Depend on Figure 1-3 Provided is a closed transformer core grounding current monitoring device, comprising a waterproof box 1, a current transformer 3 is mounted on one side of the waterproof box 1, and two clamping blocks 4 are mounted on the lower end of the current transformer 3 and the two clamping blocks 4 are arranged in parallel;

[0022] The lower end surface of the waterproof box 1 is provided with two openings, and the two openings are respectively equipped with a signal collection line interface 5 and a power input interface 6;

[0023] A signal acquisition board 7 is assembled in the waterproof box 1 through copper columns, and a power input board 8 is assembled on one side of the signal acquisition board 7. The power input board 8 corresponds to the pins on one side of the signal acquisition board 7 and is connected to the signal acquisition board 7 through screws.

[0024] In this embodiment, the entire device is inserted into the transformer grounding flat steel, and the two clamping blocks 4 are clamped in appropriate positions by screws. Then, the device is connected to the external detection display through an external power supply to start the detection operation. The device reduces the installation personnel cost and can be installed by one person. At the same time, it solves the actual installation problem of the existing device being bulky and heavy, and greatly improves the practicality of the device. By using a waterproof box 1 as the outer shell, the communication and power supply cables enter from the signal acquisition line interface 5 and the power input interface 6 at the bottom of the waterproof box 1 shell, which can effectively protect the sealing of the signal acquisition board 7 and ensure its normal operation.

[0025] Specifically, refer to Figure 1-3 The two clamps 4 are electrically connected to the current transformer 3, the current transformer 3 is electrically connected to the signal acquisition board 7, and the signal acquisition line interface 5, the power input interface 6, the signal acquisition board 7, and the power input board 8 are electrically connected.

[0026] In this embodiment, the power supply connection method is a prior art, and the control circuit can be implemented through simple programming by technicians in this field. It belongs to the common knowledge in this field and is only used without modification. Therefore, the control method and circuit connection are not described in detail.

[0027] Specifically, refer to Figure 1-3 A circular ring is provided on the upper end surface of the current transformer 3 and an insulating sleeve 2 is installed inside the circular ring.

[0028] In this embodiment, the insulating sleeve 2 can provide electrical insulation within the ring of the current transformer 3, preventing the metal part of the current transformer 3 from directly contacting the external conductor or other metal structure, thereby avoiding problems such as electrical short circuit or leakage, and the insulating sleeve 2 can effectively protect the safety of personnel and equipment. When the current transformer 3 is running, the insulating sleeve 2 can prevent personnel from accidentally touching the high-voltage part, reducing the risk of electric shock. The insulating sleeve 2 can help reduce the interference of the external environment on the current transformer 3, improve the accuracy and stability of the measurement, and the insulating sleeve 2 can also provide a certain degree of mechanical protection to prevent external objects from damaging the current transformer 3 or affecting its normal operation.

[0029] Specifically, refer to Figure 1-3 A cover plate is assembled on one side of the waterproof box 1 by screws.

[0030] In this embodiment, by installing a cover plate on one side of the waterproof box 1, the waterproof performance of the device can be enhanced to avoid damage to internal electrical components.

[0031] Specifically, refer to Figure 1-3 The waterproof box 1 and the current transformer 3 are fixed by screw locking, and the two clamping blocks 4 are fixed by screw connection to the bottom plate of the current transformer 3.

[0032] In this embodiment, the various components are connected by screws. Screw fixation can provide a reliable connection to ensure the stability and safety between the parts. The screw connection can be easily disassembled to facilitate maintenance, replacement or repair of parts. The screw connection is suitable for parts of various materials and shapes and is flexible and versatile.

[0033] The utility model of closed transformer core grounding current monitoring device:

[0034] During actual use, the waterproof box 1 and the current transformer 3 are screwed and fixed, the insulating sleeve 2 is set in the circular ring at the upper end of the current transformer 3, and then the two clamping blocks 4 are connected and fixed to the bottom plate at the lower end of the current transformer 3 by screws, and the signal acquisition line interface 5 and the power input interface 6 are snapped into the two openings set at the lower end of the waterproof box 1. A waterproof ring can also be set on the periphery to further enhance the waterproof performance, and then the signal acquisition board 7 is installed in the waterproof box 1 by screws, and the power input board 8 is aligned with the pin of the signal acquisition board 7 and inserted, and installed on one side of the signal acquisition board 7 by screws, and then the cover on one side of the waterproof box 1 is closed, and the waterproof box 1 and the cover are fixed with screws, the whole device is put into the transformer grounding flat steel, and the two clamping blocks 4 are clamped in a suitable position by screws, and then the device is connected to the external detection display through an external power supply, and then the detection operation can be started.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A closed transformer core grounding current monitoring device, characterized in that: It comprises a waterproof box (1), one side of the waterproof box (1) is equipped with a current transformer (3), the lower end of the current transformer (3) is equipped with two clamping blocks (4), and the two clamping blocks (4) are arranged in parallel; The lower end surface of the waterproof box (1) is provided with two openings, and the two openings are respectively equipped with a signal collection line interface (5) and a power input interface (6); A signal acquisition board (7) is mounted in the waterproof box (1) via a copper column, a power input board (8) is mounted on one side of the signal acquisition board (7), and the power input board (8) corresponds to the pins on one side of the signal acquisition board (7) and is connected to the signal acquisition board (7) via screws.

2. The closed transformer core grounding current monitoring device according to claim 1, characterized in that: The two clamping blocks (4) are electrically connected to the current transformer (3), the current transformer (3) is electrically connected to the signal acquisition board (7), and the signal acquisition line interface (5), the power input interface (6), the signal acquisition board (7), and the power input board (8) are electrically connected.

3. The closed transformer core grounding current monitoring device according to claim 1, characterized in that: The upper end surface of the current transformer (3) is provided with a circular ring and an insulating sleeve (2) is installed inside the circular ring.

4. The closed transformer core grounding current monitoring device according to claim 1, characterized in that: A cover plate is assembled on one side of the waterproof box (1) by means of screws.

5. The closed transformer core grounding current monitoring device according to claim 1, characterized in that: The waterproof box (1) and the current transformer (3) are fixed by screw locking.

6. The closed transformer core grounding current monitoring device according to claim 1, characterized in that: The two clamping blocks (4) are connected and fixed to the bottom plate of the current transformer (3) by means of screws.

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