An integrated sensing device for transformer core grounding current

Abstract

This utility model discloses an integrated sensing device for transformer core grounding current, relating to the field of transformer core grounding detection technology. It includes an open-type current transformer comprising an upper core and a lower core. A mounting base is fixedly provided at the bottom of the lower core. Insert plates are fixedly provided at both ends of the bottom of the upper core. Connection holes for the insert plates are opened at both ends of the top of the lower core. Insert holes are opened at the lower end of the insert plates. Two symmetrically arranged vertical rods are fixedly provided at the top of the mounting base, and a support frame is fixedly provided through the two vertical rods. Elastic mechanisms are provided on both sides of the support frame, and locking plates are provided through these elastic mechanisms. The upper end of the locking plates is inserted into the insertion holes. This utility model allows for quick connection and disconnection of the upper and lower parts of the open-type current transformer, ensuring stable cable insertion and removal, thus improving the ease of operation for transformer core grounding detection.

Description

Technical Field

[0001] This utility model relates to the field of transformer core grounding detection technology, specifically to an integrated sensing device for transformer core grounding current. Background Technology

[0002] In modern power systems, transformers, as core hubs, bear the heavy responsibility of voltage conversion and power transmission. The iron core, as the core component of the transformer, is directly related to the performance and safety of the transformer if its grounding status is normal. Therefore, it is necessary to implement stable sensing and monitoring of the iron core grounding status during the use of the transformer. For example, patent document CN209167366U discloses a transformer iron core grounding current monitoring and sensing device. This device uses the cooperation of a monitoring mechanism, a reset mechanism, a monitoring meter, and a grounding wire. By rotating the handle to turn the second limit clamp, the first limit clamp and the second limit clamp clamp the grounding wire. Then, the monitoring meter is opened to monitor the grounding wire. At the same time, the alarm device in the monitoring meter alarms for multiple grounding situations.

[0003] However, when the above-mentioned device and the existing open-type current transformer are used to thread the cable under test, the two sides of the current transformer need to be locked together with bolts and other components, which makes the cable threading and subsequent removal too slow and reduces the ease of operation of the sensing device. Utility Model Content

[0004] In view of the problems existing in the above-mentioned integrated sensing device for transformer core grounding current, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide an integrated sensing device for transformer core grounding current, which solves the problem that the connection between the upper and lower parts of the open-type current transformer used for grounding detection in the prior art is cumbersome and inconvenient for cable threading and quick removal.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An integrated sensing device for transformer core grounding current includes an open-type current transformer. The open-type current transformer includes an upper core and a lower core. A mounting base is fixedly provided at the bottom of the lower core. Insert plates are fixedly provided at both ends of the bottom of the upper core. Connection holes for the insert plates are opened at both ends of the top of the lower core. Insert holes are opened at the lower end of the inner side of the insert plates. Two symmetrically arranged vertical rods are fixedly provided at the top of the mounting base, and a support frame is fixedly provided through the two vertical rods. Elastic mechanisms are provided on both sides of the inner side of the support frame, and a locking plate is provided through the elastic mechanisms. The upper end of the locking plate is inserted into the insertion hole.

[0008] The upper end of the mounting base is provided with a push plate, and a push-separation mechanism for pushing the card plate to move is provided between the push plate and the card plate.

[0009] Preferably, the elastic mechanism includes a crossbar, which is fixedly disposed on the inner side wall of the support frame and slidably passes through the interior of the clamping plate. A spring is sleeved on the wall of the crossbar, and the two ends of the spring are fixedly connected to the crossbar and the clamping plate, respectively.

[0010] Preferably, the pushing and separating mechanism includes two symmetrically arranged guide rods, both of which are fixedly disposed at the lower side of the mounting base and slidably pass through the push plate. The cross-section of the guide rods is T-shaped. The push plate has two symmetrically arranged drive holes inside. The bottom of the clamping plate is fixedly provided with a transmission rod, which is slidably disposed in the drive holes.

[0011] Preferably, the crossbar is a square bar.

[0012] Furthermore, guide slopes are provided on the upper side of the two card plates at opposite ends.

[0013] Preferably, the support frame is a U-shaped support frame.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0015] 1. This utility model, through the setting of a plug plate, connecting hole, clamping plate and elastic mechanism, realizes the quick plugging and connection of the upper and lower parts of the open-type current transformer. Compared with the traditional bolt connection method, it greatly shortens the installation time of the current transformer and improves the efficiency of the grounding cable of the transformer core. At the same time, the setting of the separation mechanism makes the current transformer separation operation simple and convenient for cable removal. The whole operation process is simple and quick, significantly improving the efficiency of the testing work. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 For the present utility model Figure 1 Enlarged schematic diagram of part A;

[0019] Figure 3 This is a top view of the push plate of this utility model.

[0020] Figure 4 This is a three-dimensional structural diagram of the guide rod of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Upper iron core; 2. Lower iron core; 3. Mounting base; 4. Insert plate; 5. Insertion hole; 6. Vertical rod; 7. Support frame; 8. Clamping plate; 9. Push plate; 10. Horizontal rod; 11. Spring; 12. Guide rod; 13. Drive hole; 14. Transmission rod; 15. Connection hole. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0024] This utility model discloses an integrated sensing device for transformer core grounding current.

[0025] Example 1

[0026] This utility model provides, for example Figure 1-4 An integrated sensing device for transformer core grounding current is shown, comprising an open-type current transformer, which includes an upper core 1 and a lower core 2. A mounting base 3 is fixedly provided at the bottom of the lower core 2. Insert plates 4 are fixedly provided at both ends of the bottom of the upper core 1. Connection holes 15 for the insert plates 4 are provided at both ends of the top of the lower core 2. Insert holes 5 are provided at the lower end of the insert plates 4. Guide slopes are provided on the upper side of the two clamping plates 8 at opposite ends. Two symmetrically arranged vertical rods 6 are fixedly provided at the top of the mounting base 3, and a support frame 7 is fixedly provided through the two vertical rods 6. The support frame 7 is a U-shaped support frame. Elastic mechanisms are provided on both sides of the support frame 7, and clamping plates 8 are provided through the elastic mechanisms. The upper end of the clamping plate 8 is inserted into the insertion hole 5.

[0027] The elastic mechanism includes a crossbar 10, which is a square bar. The crossbar 10 is fixed to the inner wall of the support frame 7 and slides through the inside of the clamping plate 8. A spring 11 is sleeved on the bar wall of the crossbar 10, and the two ends of the spring 11 are fixedly connected to the crossbar 10 and the clamping plate 8 respectively.

[0028] Before conducting the inspection, the lower core 2 is first placed in a suitable position using the mounting base 3. At this point, the transformer core grounding cable needs to be inspected. The upper core 1 and lower core 2 need to be connected. Since the bottom ends of the upper core 1 are fixed with insert plates 4, and the top ends of the lower core 2 have connection holes 15, the insert plates 4 are aligned with the connection holes 15 and inserted. During insertion, the insert plates 4 will gradually approach the retaining plate 8 on the support frame 7. Because the retaining plate 8 is connected to the support frame 7 via an elastic mechanism, the crossbar 10 in the elastic mechanism is fixed to the inner wall of the support frame 7 and passes through... The spring 11, which is installed inside the card plate 8 and sleeved on the crossbar 10, is fixedly connected at both ends to the crossbar 10 and the card plate 8, respectively. When the insert plate 4 presses the card plate 8, the card plate 8 will slide along the crossbar 10 to both sides, compressing the spring 11. When the insertion hole 5 on the insert plate 4 moves to align with the card plate 8, the upper end of the card plate 8 is inserted into the insertion hole 5 under the elastic force of the spring 11, thereby realizing the quick insertion of the upper iron core 1 and the lower iron core 2, and stably placing the transformer iron core grounding cable inside the transformer, completing the cable threading operation. At this time, the grounding current detection work can be carried out.

[0029] Example 2

[0030] Example 2, based on Example 1, aims to enable the cable to be removed from inside the current transformer device, allowing for the rapid separation of the card plate 8 and the insertion plate 4. For example... Figure 1-3 As shown, the upper end of the mounting base 3 is provided with a push plate 9, and a push separation mechanism for pushing the plate 8 to move is provided between the push plate 9 and the plate 8. The push separation mechanism includes two symmetrically arranged guide rods 12. Both guide rods 12 are fixedly installed on the lower side of the mounting base 3 and slide through the push plate 9. The cross-section of the guide rods 12 is T-shaped. The push plate 9 has two symmetrically arranged drive holes 13. The bottom of the plate 8 is fixedly provided with a transmission rod 14, which slides in the drive hole 13.

[0031] When it is necessary to remove the cable from the transformer, push the push plate 9 at the upper end of the mounting base 3. When the push plate 9 is pushed, it moves along the guide rod 12. The drive hole 13 will drive the transmission rod 14 to move, which will cause the clamping plate 8 to slide along the cross bar 10 to both sides, compressing the spring 11. The upper end of the clamping plate 8 will disengage from the insertion hole 5 of the insertion plate 4. At this time, the upper iron core 1 can be easily lifted, and the insertion plate 4 can be pulled out from the connection hole 15, making it convenient to remove the cable from the inside of the transformer.

[0032] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An integrated sensing device for transformer core grounding current, comprising an open-type current transformer, characterized in that, The open-type current transformer includes an upper iron core (1) and a lower iron core (2). The bottom of the lower iron core (2) is fixedly provided with a mounting base (3). Both ends of the bottom of the upper iron core (1) are fixedly provided with insert plates (4). Both ends of the top of the lower iron core (2) are provided with connecting holes (15) for the insert plates (4) to pass through. The lower end of the insert plate (4) is provided with a socket (5). The top of the mounting base (3) is fixedly provided with two symmetrically arranged vertical rods (6), and a support frame (7) is fixedly provided through the two vertical rods (6). Both sides of the support frame (7) are provided with elastic mechanisms, and a clamping plate (8) is provided through the elastic mechanisms. The upper end of the clamping plate (8) is inserted into the socket (5). The upper end of the mounting base (3) is provided with a push plate (9), and a push separation mechanism for pushing the plate (8) to move is provided between the push plate (9) and the plate (8).

2. The integrated transformer core grounding current sensing device according to claim 1, characterized in that, The elastic mechanism includes a crossbar (10), which is fixedly disposed on the inner side wall of the support frame (7) and slides through the inside of the clamping plate (8). A spring (11) is sleeved on the bar wall of the crossbar (10), and the two ends of the spring (11) are fixedly connected to the crossbar (10) and the clamping plate (8) respectively.

3. The integrated transformer core grounding current sensing device according to claim 1, characterized in that, The pushing and separating mechanism includes two symmetrically arranged guide rods (12). Both guide rods (12) are fixedly disposed on the lower side of the mounting base (3) and slide through the push plate (9). The cross-section of the guide rods (12) is T-shaped. The push plate (9) has two symmetrically arranged drive holes (13). The bottom of the clamping plate (8) is fixedly provided with a transmission rod (14), which slides in the drive hole (13).

4. The integrated transformer core grounding current sensing device according to claim 2, characterized in that, The crossbar (10) is a square bar.

5. The integrated transformer core grounding current sensing device according to claim 1, characterized in that, The two card plates (8) are provided with guide slopes on the upper side of the opposite ends.

6. The integrated sensing device for transformer core grounding current according to claim 1, characterized in that, The support frame (7) is a U-shaped support frame.

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