Outdoor 10kv metering combined transformer

Abstract

The present application relates to the technical fields of metering combined mutual inductor, specifically to an outdoor 10kV metering combined mutual inductor, which comprises a combined mutual inductor main body, a secondary wiring box, a wrapping insulation skin and a cable, the inner wall of the secondary wiring box is threadedly connected with a second bolt, the end of the second bolt is rotatably installed with a moving block, the outer wall of the moving block is fixedly connected with two connecting rods, and the end of the connecting rod is fixedly connected with a moving frame, the beneficial effects of the present application are that when the moving block moves towards the secondary wiring box, the moving frame and the cable clamp seat can move upwards with the cable, the cable can be pulled out of the wrapping insulation skin, the length of the cable exposed outside the wrapping insulation skin is further increased, the cable in the distance from the clamping position of the cable clamp seat to the outside of the first clamping block is in a relaxed and folded state, and the influence of the shaking of the wrapping insulation skin on the connection of the wiring end is further reduced.

Description

Technical Field

[0001] This invention relates to the field of metering combined current transformer technology, specifically an outdoor 10kV metering combined current transformer. Background Technology

[0002] An outdoor 10kV metering combined transformer is an integrated device used for high-voltage power metering. It is usually installed in 10kV distribution lines to measure parameters such as current and voltage, and convert them into standard signals for use by power meters or data acquisition systems.

[0003] Currently available outdoor 10kV metering combined transformers typically require multiple meter wires to be sequentially connected to the secondary junction box after being put into use. The meter wires usually consist of a main wire containing several functional wires. During wiring, the outer insulation of the main wire needs to be stripped to connect the internal functional wires to the terminals in the secondary junction box. This results in multiple thin wire terminals being connected, while the main wire is usually exposed without a fixed position. Because the main wire has a certain weight vertically downwards, it is prone to swaying and tearing off the connection points of individual thin functional wires during strong winds. Even if the main wire position is fixed, it is still easy to tear off individual functional wire connection points when the main wire sways significantly. Furthermore, in strong winds, the swaying of the main wire can cause multiple functional wires to become tangled due to insufficient spacing. Therefore, an outdoor 10kV metering combined transformer is needed to solve this problem. Summary of the Invention

[0004] This invention provides an outdoor 10kV metering combined transformer, which has the beneficial effects of preventing the single functional line connection from falling off and facilitating the prevention of heat accumulation between functional lines. It solves the problem mentioned in the background art that the main line is exposed to the outside, and the main line has a certain weight when it is vertically downward. In the event of strong winds and rain, the shaking of the main line can easily tear off the connection of the single thin functional line terminal. To achieve the above objectives, the present invention provides the following technical solution: an outdoor 10kV metering combined transformer, comprising a combined transformer body, a secondary junction box, an insulating sheath, and cables. A second bolt is threaded onto the inner wall of the secondary junction box. A movable block is rotatably mounted on the end of the second bolt. Two connecting rods are fixedly connected to the outer wall of the movable block. A movable frame is fixedly connected to one end of each connecting rod. Multiple sliders are slidably connected to the inner wall of the movable frame. A wire clamp for limiting cable position is fixedly connected to the outer wall of each slider. A third sliding guide groove is formed on the inner wall of the secondary junction box. A guide rod is fixedly connected to the outer wall of each slider. A second sliding guide groove is formed on the outer wall of the movable frame. The guide rod slides on the inner wall of the second sliding guide groove. A ball bearing is rotatably mounted on one end of the guide rod. The ball bearing is slidably connected to the inner wall of the third sliding guide groove.

[0005] Preferably, the inner wall of the cable clamp is threaded with a third bolt, and a clamping plate is rotatably mounted on one end of the third bolt. The clamping plate is used to clamp the cable.

[0006] Preferably, the insulating sheath is disposed on the outer wall of the cable, a second clamping block is fixedly connected to the inner wall of the secondary junction box, a fixing block is fixedly connected to the inner wall of the secondary junction box, a first guide rod is slidably connected to the inner wall of the fixing block, a first clamping block is fixedly connected to one end of the first guide rod, a return spring is sleeved on the outer wall of the first guide rod, one end of the return spring is fixedly connected to the outer wall of the first clamping block, and the other end of the return spring is fixedly connected to the outer wall of the fixing block.

[0007] Preferably, the outer walls of both the first clamping block and the second clamping block are fixedly connected with a plurality of evenly distributed rubber protrusions.

[0008] Preferably, a second abutment block is fixedly connected to the outer wall of the first clamping block, and a second abutment slope is formed on the outer wall of the second abutment block. A first abutment block is fixedly connected to the outer wall of the moving block, and a first abutment slope is formed on the outer wall of the first abutment block. The outer contours of the second abutment slope and the first abutment slope are matched.

[0009] Preferably, the inner wall of the secondary junction box is provided with a first sliding guide groove, and the outer wall of the movable frame is fixedly connected with a second guide rod, which is slidably connected to the inner wall of the first sliding guide groove.

[0010] Preferably, the cable end is fixedly connected to a terminal block, the inner wall of the secondary junction box is threaded with a wire clamping screw, and the outer wall of the secondary junction box is fixedly installed with a waterproof cover.

[0011] Preferably, the secondary junction box is fixedly installed on the outer wall of the combined current transformer body, and a current transformer mounting base is fixedly connected to the outer wall of the combined current transformer body, and the current transformer mounting base has multiple mounting holes.

[0012] Preferably, an upper cover plate is fixedly installed on the outer wall of the combined current transformer body, and multiple first bolts are threadedly connected to the inner walls of both the combined current transformer body and the upper cover plate.

[0013] Preferably, a lifting hook is fixedly connected to the outer wall of the combined current transformer body, and multiple epoxy resin insulating cylinders are fixedly installed on the combined current transformer body, with terminal blocks fixedly installed at the ends of the epoxy resin insulating cylinders.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. In this invention, when the moving block moves toward the secondary junction box, the moving frame and the wire clamping seat move the cable upwards, which can pull the cable upwards from inside the wrapped insulation, further increasing the length of the cable exposed outside the wrapped insulation. This makes the cable in the distance between the clamping position of the wire clamping seat and the first clamping block in a relaxed and bent state, further reducing the pulling effect of the swaying of the wrapped insulation on the connection of the terminal in windy weather.

[0016] 2. In this invention, as the moving frame moves upward, multiple cables move and separate in a direction away from each other, increasing the distance between the multiple cables. This ensures that each cable has a certain spatial distance during use, preventing the problem of multiple cables getting tangled together due to insufficient distance between them when the main line sways in windy weather.

[0017] 3. In this invention, rotating the second bolt changes the cable between the clamp and the terminal from a taut, drooping state to a slack, bent state. This allows the cable in the secondary junction box to withstand greater tension when the exposed insulation sways in windy weather, preventing the terminal from being pulled off. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional front view structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the overall three-dimensional rear view structure of the present invention;

[0020] Figure 3 This is a schematic cross-sectional view of the secondary junction box of the present invention;

[0021] Figure 4 This is an enlarged schematic diagram of the secondary junction box and its surrounding structure according to the present invention;

[0022] Figure 5 This is a schematic diagram of the second contact block and its surrounding structure according to the present invention;

[0023] Figure 6 This is a bottom-view cross-sectional structural diagram of the present invention;

[0024] Figure 7 This is a schematic cross-sectional view of the secondary junction box of the present invention;

[0025] Figure 8 This is a schematic diagram of the cross-sectional structure of the movable frame and its surrounding area according to the present invention;

[0026] Figure 9 For the present invention Figure 8 Enlarged structural diagram at point A in the middle.

[0027] The components represented by each number in the attached diagram are listed below: 1. Combined current transformer body; 2. Current transformer mounting base; 3. Mounting hole; 4. Lifting hook; 5. Top cover plate; 6. First bolt; 7. Epoxy resin insulating cylinder; 8. Terminal block; 9. Secondary junction box; 10. Waterproof cover plate; 11. Second bolt; 12. Moving block; 13. First contact block; 14. First contact ramp; 15. Fixing block; 16. First guide rod; 17. First clamping block; 18. Rubber protrusion; 19. Second abutting inclined surface; 20. Second abutting block; 21. Return spring; 22. Second clamping block; 23. Insulating sheath; 24. Cable; 25. Connecting rod; 26. Moving frame; 27. First sliding guide groove; 28. Second guide rod; 29. ​​Wire clamping screw; 30. Terminal; 31. Second sliding guide groove; 32. Slider; 33. Guide rod; 34. Wire clamp seat; 35. Third bolt; 36. Clamping plate; 37. Third sliding guide groove; 38. Ball bearing. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1: This example helps solve the problem of exposed main lines, which have a certain weight hanging vertically downwards. In strong winds and heavy rain, the swaying of the main line can easily tear off the connection points of thinner functional wires. Please refer to [link / reference needed]. Figure 1 - Figure 9 An outdoor 10kV metering combined transformer includes a combined transformer body 1, a secondary junction box 9, an insulating sheath 23, and a cable 24. The inner wall of the secondary junction box 9 is threaded with a second bolt 11. A movable block 12 is rotatably mounted on the end of the second bolt 11. Two connecting rods 25 are fixedly connected to the outer wall of the movable block 12. A movable frame 26 is fixedly connected to one end of the connecting rod 25. Multiple sliders 32 are slidably connected to the inner wall of the movable frame 26. A clamping seat 34 for limiting the position of the cable 24 is fixedly connected to the outer wall of the slider 32.

[0030] The inner wall of the cable clamp 34 is threaded with a third bolt 35, and a clamping plate 36 is rotatably mounted on one end of the third bolt 35. The clamping plate 36 is used to clamp the cable 24.

[0031] An insulating sheath 23 is fitted onto the outer wall of the cable 24. A second clamping block 22 is fixedly connected to the inner wall of the secondary junction box 9. A fixing block 15 is fixedly connected to the inner wall of the secondary junction box 9. A first guide rod 16 is slidably connected to the inner wall of the fixing block 15. A first clamping block 17 is fixedly connected to one end of the first guide rod 16. A return spring 21 is fitted onto the outer wall of the first guide rod 16. One end of the return spring 21 is fixedly connected to the outer wall of the first clamping block 17, and the other end of the return spring 21 is fixedly connected to the outer wall of the fixing block 15.

[0032] Multiple evenly distributed rubber protrusions 18 are fixedly connected to the outer walls of both the first clamping block 17 and the second clamping block 22.

[0033] The outer wall of the first clamping block 17 is fixedly connected to the second abutting block 20. The outer wall of the second abutting block 20 is provided with a second abutting slope 19. The outer wall of the moving block 12 is fixedly connected to the first abutting block 13. The outer wall of the first abutting block 13 is provided with a first abutting slope 14. The outer contours of the second abutting slope 19 and the first abutting slope 14 are matched.

[0034] The inner wall of the secondary junction box 9 is provided with a first sliding guide groove 27, and the outer wall of the movable frame 26 is fixedly connected with a second guide rod 28, which is slidably connected to the inner wall of the first sliding guide groove 27.

[0035] The end of the cable 24 is fixedly connected to a terminal 30, the inner wall of the secondary junction box 9 is threaded with a wire clamping screw 29, and the outer wall of the secondary junction box 9 is fixedly installed with a waterproof cover plate 10.

[0036] In this embodiment: When using the outdoor 10kV metering combined transformer, first remove the waterproof cover plate 10, then use a wire stripper to peel off the end of the wrapped insulation 23 to expose the multiple strands of cable 24, press the terminal 30 of the multiple cable 24 into the corresponding clamping screw 29 in sequence, tighten the clamping screw 29 to complete the connection of the cable 24, then press the multiple cables 24 into the corresponding clamping seat 34 in sequence, and then tighten the third bolt 35 so that the third bolt 35 moves along the inner wall of the clamping seat 34. During the movement, the clamping plate 36 continuously presses the cable 24 in the clamping seat 34.

[0037] Then rotate the second bolt 11 so that the second bolt 11 moves along the inner wall of the secondary junction box 9 through the threaded connection. When the second bolt 11 moves, it moves synchronously with the moving block 12. The moving block 12 moves synchronously with the connecting rod 25 and the moving frame 26. During the movement of the moving frame 26, it moves along the guide trajectory of the first sliding guide groove 27 with the second guide rod 28.

[0038] During the movement of the movable frame 26, the cable 24 clamped by the clamping seat 34 moves upward. Since the terminal 30 at the upper end of the cable 24 is pressed and restricted by the wire clamping screw 29, the upward movement of the cable 24 will pull more length of the cable 24 and the wrapped insulation 23 into the secondary junction box 9. This changes the distance between the clamping seat 34 and the terminal 30 of the cable 24 from a drooping and taut state to a bent and slack state. In windy weather, when the exposed wrapped insulation 23 shakes, the cable 24, which is in a slack state in the secondary junction box 9, can withstand greater pulling force, preventing the terminal 30 at the end of the cable 24 from being pulled off.

[0039] Furthermore, as the movable block 12 moves into the secondary junction box 9, it will move synchronously with the first abutment block 13. During its upward movement, the first abutment block 13 will abut against the outer wall of the second abutment block 20, causing the first abutment slope 14 to abut against the second abutment slope 19. This abutment will subject the second abutment block 20 to a force away from the first abutment block 13, causing the second abutment block 20, along with the first clamping block 17 and the first guide rod 16, to slide along the inner wall of the fixed block 15. During this sliding process, the return spring 21 will be stretched and tightened. The movement of the first clamping block 17 will place the first clamping block 17 and the second clamping block 22 between the two blocks. The insulation 23 is further compressed, and as the moving block 12 continues to move upward, the clamping degree of the insulation 23 is increased. Since the insulation 23 is compressed and cannot move, the moving frame 26 and the clamping seat 34 can pull the cable 24 upward from inside the insulation 23 when they move upward with the cable 24. This further reduces the length of the cable 24 exposed outside the insulation 23, so that the cable 24 is in a relaxed and bent state from the clamping position of the clamping seat 34 to the outside of the first clamping block 17. This further reduces the pulling effect of the swaying of the insulation 23 on the connection of the terminal 30 during windy weather.

[0040] When it is necessary to check and disconnect the connection between the cable 24 and the terminal 30, turn the second bolt 11 in the opposite direction, so that the second bolt 11 moves away from the secondary junction box 9 along with the moving block 12. At this time, the two moving frames 26 move down, so that the multiple clamping seats 34 are reset under the guidance of the third sliding guide groove 37. At this time, the moving block 12 gradually releases its contact with the second abutment block 20, so that the return spring 21 rebounds and moves the first guide rod 16 and the first clamping block 17 to reset, gradually releasing the clamping force on the outer wall of the wrapped insulation 23. At this time, the wire pressing screw 29 can be turned in sequence to release the pressure on the terminal 30, and the entire wrapped insulation 23 and cable 24 can be removed for maintenance.

[0041] Example 2: This example helps solve the problem of heat accumulation caused by multiple cables 24 being close together. This example is an improvement on Example 1. For details, please refer to... Figure 1 - Figure 9 The inner wall of the secondary junction box 9 is provided with a third sliding guide groove 37. The outer wall of the slider 32 is fixedly connected with a guide rod 33. The outer wall of the moving frame 26 is provided with a second sliding guide groove 31. The guide rod 33 slides on the inner wall of the second sliding guide groove 31. One end of the guide rod 33 is rotatably mounted with a ball bearing 38. The ball bearing 38 is slidably connected to the inner wall of the third sliding guide groove 37.

[0042] The secondary junction box 9 is fixedly installed on the outer wall of the combined current transformer body 1. The outer wall of the combined current transformer body 1 is fixedly connected to the current transformer mounting base 2, which has multiple mounting holes 3.

[0043] The outer wall of the combined transformer body 1 is fixedly installed with an upper cover plate 5, and the inner walls of both the combined transformer body 1 and the upper cover plate 5 are threaded with multiple first bolts 6.

[0044] A lifting hook 4 is fixedly connected to the outer wall of the combined current transformer body 1. Multiple epoxy resin insulating cylinders 7 are fixedly installed on the combined current transformer body 1, and terminal blocks 8 are fixedly installed at the ends of the epoxy resin insulating cylinders 7.

[0045] In this embodiment: when the second bolt 11 is rotated and the moving block 12 moves into the secondary junction box 9, as the moving frame 26 moves upward, the moving frame 26 moves synchronously with the multiple sliders 32 sliding on the inner wall. The movement of the sliders 32 moves synchronously with the guide rod 33 and the ball bearing 38 on the outer wall, so that the ball bearing 38 slides along the trajectory of the third sliding guide groove 37. The third sliding guide groove 37 is set as an inclined guide groove, so that the ball bearing 38, along with the guide rod 33 and the slider 32, is subjected to lateral force and slides along the second sliding guide groove 31. The sliding of the slider 32 moves synchronously with the wire clamp 34, and the wire clamp 34 moves synchronously with the clamped cable 24, so that the multiple cables 24 move away from each other and separate, increasing the distance between the multiple cables 24, so that each cable 24 has a certain space for heat dissipation during use, preventing heat accumulation caused by wire tangling or wires being tightly pressed.

[0046] The current transformer mounting base 2 can be aligned with the mounting slot at the outdoor installation location. The mounting hole 3 and the mounting slot can be screwed in and fixed using external bolts. The entire combined current transformer body 1 can be lifted and installed by aligning the crane hook with the lifting hook 4.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An outdoor 10 kV metering combination transformer comprising a combination transformer body (1), a secondary terminal box (9), a wrapping insulation skin (23) and a cable (24), characterized in that: The inner wall of the secondary wiring box (9) is threadedly connected with a second bolt (11), the end of the second bolt (11) is rotatably provided with a moving block (12), the outer wall of the moving block (12) is fixedly connected with two connecting rods (25), one end of the connecting rod (25) is fixedly connected with a moving frame (26), the inner wall of the moving frame (26) is slidably connected with a plurality of sliding blocks (32), the outer wall of the sliding block (32) is fixedly connected with a wire clamping seat (34) for limiting the position of the cable (24), the inner wall of the secondary wiring box (9) is provided with a third sliding guide groove (37), the outer wall of the sliding block (32) is fixedly connected with a guide rod (33), the outer wall of the moving frame (26) is provided with a second sliding guide groove (31), the guide rod (33) slides in the inner wall of the second sliding guide groove (31), one end of the guide rod (33) is rotatably provided with a ball (38), and the ball (38) slidably connects the inner wall of the third sliding guide groove (37). The wrapping insulation skin (23) is arranged on the outer wall of the cable (24), the inner wall of the secondary wiring box (9) is fixedly connected with a second clamping block (22), the inner wall of the secondary wiring box (9) is fixedly connected with a fixed block (15), the inner wall of the fixed block (15) is slidably connected with a first guide rod (16), one end of the first guide rod (16) is fixedly connected with a first clamping block (17), the outer wall of the first guide rod (16) is sleeved with a reset spring (21), one end of the reset spring (21) is fixedly connected with the outer wall of the first clamping block (17), and the other end of the reset spring (21) is fixedly connected with the outer wall of the fixed block (15).

2. The outdoor 10 kV metering combination transformer of claim 1, wherein: The inner wall of the wire clamping seat (34) is threadedly connected with a third bolt (35), one end of the third bolt (35) is rotatably provided with a clamping plate (36), and the clamping plate (36) is used for clamping the cable (24).

3. The outdoor 10 kV metering combination transformer of claim 1, wherein: The outer wall of the first clamping block (17) and the second clamping block (22) is fixedly connected with a plurality of uniformly distributed rubber protrusions (18).

4. The outdoor 10 kV metering combination transformer of claim 1, wherein: The outer wall of the first clamping block (17) is fixedly connected with a second abutting block (20), the outer wall of the second abutting block (20) is provided with a second abutting inclined surface (19), the outer wall of the moving block (12) is fixedly connected with a first abutting block (13), the outer wall of the first abutting block (13) is provided with a first abutting inclined surface (14), and the outer contour of the second abutting inclined surface (19) and the first abutting inclined surface (14) are matched with each other.

5. The outdoor 10 kV metering combination transformer of claim 1, wherein: The inner wall of the secondary wiring box (9) is provided with a first sliding guide groove (27), the outer wall of the moving frame (26) is fixedly connected with a second guide rod (28), and the second guide rod (28) slidably connects the inner wall of the first sliding guide groove (27).

6. The outdoor 10 kV metering combination transformer of claim 1, wherein: The end of the cable (24) is fixedly connected with a wiring end (30), the inner wall of the secondary wiring box (9) is threadedly connected with a wire pressing screw (29), and the outer wall of the secondary wiring box (9) is fixedly provided with a waterproof cover plate (10).

7. The outdoor 10 kV metering combination transformer of claim 1, wherein: The secondary wiring box (9) is fixedly installed on the outer wall of the combined mutual inductor main body (1), the outer wall of the combined mutual inductor main body (1) is fixedly connected with a mutual inductor mounting seat (2), and a plurality of mounting holes (3) are formed in the mutual inductor mounting seat (2).

8. An outdoor 10 kV metering combination transformer according to claim 7, characterized in that: The outer wall of the combined mutual inductor main body (1) is fixedly connected with an upper cover plate (5), and the inner walls of the combined mutual inductor main body (1) and the upper cover plate (5) are threadedly connected with a plurality of first bolts (6).

9. The outdoor 10 kV metering combination transformer of claim 1, wherein: The outer wall of the combined mutual inductor main body (1) is fixedly connected with a lifting hook (4), a plurality of epoxy resin insulation barrels (7) are fixedly installed on the combined mutual inductor main body (1), and wiring terminals (8) are fixedly installed at the ends of the epoxy resin insulation barrels (7).

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