Split type current transformer with take-up and pay-off functions

Abstract

The utility model relates to the technical field of electric power metering instruments, and discloses a split type current transformer with take-up and pay-off functions, which comprises a supporting plate, the upper part of the supporting plate is rotatably connected with a limiting wheel, and the upper part of the supporting plate is fixedly connected with a first polished rod and a second polished rod; limiting sliding blocks are slidably connected to the outer side of the first polished rod and the outer side of the second polished rod, one end of each limiting sliding block is slidably connected to the inner side of a limiting groove of the corresponding limiting wheel, a winding wheel is rotatably connected to the upper portion of the supporting plate, and an electric connection assembly is installed at the other end of each winding wheel. The outer wall of the supporting plate is fixedly connected with a mutual inductance assembly. According to the utility model, the limiting wheel rotates to drive the limiting slide block to reciprocate, and the first wire passes through the limiting slide block, so that the first wire reciprocates along with the limiting slide block when being recovered by the winding wheel, the effect of uniformly winding the first wire is achieved, and the problem that the long-distance wire is easy to be mutually wound when being taken up and paid off is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power metering instruments, in particular to a split current transformer with a line-retracting and releasing function. Background Art

[0002] When it comes to monitoring and measuring high-voltage equipment, directly connecting measuring instruments and protective devices to these devices presents significant safety risks. Therefore, current transformers are commonly used as intermediate conversion devices to proportionally convert the high current of high-voltage equipment into a smaller current for supplying to the measuring instruments and protective devices. Current transformers, when in use, require electrical connections to the measuring instruments and protective devices via wires. Because current transformers are located far from these devices, long wires are required. These long wires are difficult to store and manage, and long wires are prone to entanglement during retraction and unretraction. This not only consumes significant space but can also impact the normal operation and maintenance efficiency of power equipment. Utility Model Content

[0003] In order to make up for the above shortcomings, the utility model provides a split current transformer with a wire retracting and releasing function, aiming to improve the problem that the wires are easily entangled with each other when retracting and releasing the wires over long distances.

[0004] To achieve the above-mentioned object, the utility model provides the following technical solution: a split current transformer with a wire retracting and releasing function, comprising a support plate, the upper part of the support plate being rotatably connected to a limit wheel, the outer wall of the limit wheel being provided with a limit groove, a first polished rod and a second polished rod being fixedly connected above the support plate, the outer side of the first polished rod being slidably connected to a limit slider, the middle part of the limit slider being slidably connected to the outer side of the second polished rod, one end of the limit slider being slidably connected to the inner side of the limit groove of the limit wheel, one end of the limit wheel being fixedly connected to a second synchronous wheel, the outer wall of the second synchronous wheel being rotatably connected to the upper part of the support plate, the outer side of the second synchronous wheel being connected to a synchronous belt, the inner side of the synchronous belt being connected to the first synchronous wheel away from the second synchronous wheel, the outer wall of the first synchronous wheel being rotatably connected to the upper part of the support plate, one end of the first synchronous wheel being fixedly connected to a hand crank, the other end of the first synchronous wheel being fixedly connected to a winding wheel, the outer wall of the winding wheel being rotatably connected to the upper part of the support plate, the other end of the winding wheel being installed with an electrical connection component, and the outer wall of the support plate being fixedly connected to a mutual inductance component.

[0005] Preferably, the electrical connection component includes a card wheel, one end of the card wheel is fixedly connected to the end of the winding wheel away from the first synchronization wheel, conductive columns are installed inside the card wheel and the winding wheel, the upper surface of the support plate is slidably connected to a connection box, a limiting component is installed inside the connection box, and a wiring barrel that cooperates with the conductive column is installed on the outer wall of the connection box, the other end of the wiring barrel is electrically connected to a second wire, one end of the second wire is installed inside the connection box, and the other end of the second wire is electrically connected to the inside of the mutual inductance component.

[0006] Preferably, the upper surface of the connection box is slidably connected to a top plate, the lower surface of the top plate is fixedly connected to the upper part of the support plate, the lower surface of the top plate is fixedly connected to three fixed blocks, the outer walls of the three fixed blocks are slidably connected to the upper part of the connection box, the upper surface of the support plate is fixedly connected to a slide rail, the upper part of the connection box is provided with a groove for installing the three fixed blocks, and the lower part of the connection box is provided with a groove for installing the slide rail.

[0007] Preferably, the limiting assembly includes a trigger, the outer wall of the trigger is slidably connected to the inner wall of the connecting box, the outer wall of the trigger is fixedly connected to a spring, the other end of the spring is fixedly connected to the inner wall of the connecting box, the outer wall of the connecting box is fixedly connected to a handle, and one end of the trigger is installed on the inner side of the handle.

[0008] Preferably, a plurality of grooves are provided on the outer wall of the card wheel, a hole is provided on the outer wall of the connection box near the card wheel to cooperate with the card wheel, the wiring barrel is installed inside the hole that cooperates with the card wheel, one end of the conductive column near the connection box is electrically connected to the inner side of the wiring barrel, and the other end of the conductive column is electrically connected to the first wire.

[0009] Preferably, a through hole for installing the first polished rod and the second polished rod is respectively formed in the middle of the limiting sliding block.

[0010] Preferably, the middle part of the limiting slider is rotatably connected to two directional wheels, one end of the limiting slider is fixedly connected to a third polished rod, and the outer wall of the third polished rod is slidably connected to the inner side of the limiting groove of the limiting wheel.

[0011] Preferably, the mutual inductance component includes an iron core, which is divided into an upper iron core and a lower iron core, a coil is wound around the outer wall of the upper iron core, and the two ends of the coil are electrically connected to the second wires on the left and right sides of the upper iron core respectively. An insulating shell is installed on the outside of the iron core, and nuts and bolts are installed on the outer walls on both sides of the insulating shell. The outer walls on both sides of the insulating shell are respectively fixedly connected to the outer walls of the two support plates, and the outer walls of the two top plates are respectively fixedly connected to the outer walls on both sides of the insulating shell.

[0012] The utility model has the following beneficial effects:

[0013] 1. In the utility model, the first synchronous wheel is driven to rotate by rotating the hand crank, which in turn drives the winding wheel to rotate. The first synchronous wheel drives the synchronous belt to rotate, which in turn drives the second synchronous wheel to rotate, and then drives the limiting wheel to rotate. A limiting groove is provided on the outer wall of the limiting wheel. One end of the limiting slider is slidably connected to the inner side of the limiting groove of the limiting wheel, thereby driving the limiting slider to reciprocate. Since the first wire passes through the limiting slider, the first wire reciprocates with the limiting slider when being recovered by the winding wheel, thereby achieving the effect of making the first wire evenly wound, and solving the problem that long-distance wires are easily entangled with each other when reeling in and out.

[0014] 2. In the present invention, the trigger is actuated, the spring is in a compressed state, the handle is pulled to drive the connection box to move back and forth, so that the outer wall of the card wheel is connected to the inner side of the hole of the connection box, the trigger is released, and the other end of the trigger is pushed to the gap between the two fixed blocks by the spring. The trigger is fixed by the two fixed blocks, and then the connection box is fixed. The groove of the card wheel and the hole of the connection box are used to limit the winding reel, thereby reducing the possibility of the first wire falling off due to the rotation of the winding reel when the device is stored. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the bolt structure of the split current transformer with wire retracting and releasing function proposed by the utility model;

[0016] Figure 2 This is a schematic diagram of the hand crank structure of the split current transformer with the function of retracting and releasing the wire proposed by the utility model;

[0017] Figure 3 This is a schematic diagram of the synchronous belt structure of the split current transformer with the function of retracting and releasing the wire proposed by the utility model;

[0018] Figure 4 This is a schematic diagram of the limiting wheel structure of the split current transformer with the function of retracting and releasing the wire proposed by the utility model;

[0019] Figure 5 This is a schematic diagram of the limit slider structure of the split current transformer with the function of retracting and releasing the wire proposed by the utility model;

[0020] Figure 6 This is a schematic diagram of the clamping wheel structure of the split current transformer with the function of retracting and releasing the wire proposed by the utility model;

[0021] Figure 7 This is a diagram of the winding wheel of the split current transformer with the function of retracting and releasing the wire proposed by the utility model;

[0022] Figure 8This is a schematic diagram of the connection box structure of the split current transformer with the function of retracting and releasing the wires proposed in the utility model;

[0023] Figure 9 This is a schematic diagram of the iron core structure of the split current transformer with wire retracting and releasing function proposed by the utility model.

[0024] Legend:

[0025] 1. Insulating shell; 2. Top plate; 3. Hand crank; 4. Connecting box; 5. Nut; 6. Bolt; 7. Winding reel; 8. Synchronous belt; 9. Limiting slider; 10. First polished rod; 11. Second polished rod; 12. Limiting wheel; 13. Slide rail; 14. Second conductor; 15. Support plate; 16. First synchronous wheel; 17. Second synchronous wheel; 18. Clamping wheel; 19. Third polished rod; 20. Conductive column; 21. Handle; 22. Trigger; 23. Wire barrel; 24. Spring; 25. Iron core; 26. Orienting wheel; 27. Fixing block. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings of the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Reference Figures 1-9 The utility model provides an embodiment of a split current transformer with a wire retracting and releasing function, comprising a support plate 15, the upper part of the support plate 15 is rotatably connected to a limit wheel 12, the outer wall of the limit wheel 12 is provided with a limit groove, the upper part of the support plate 15 is fixedly connected to a first polished rod 10 and a second polished rod 11, the outer side of the first polished rod 10 is slidably connected to a limit slider 9, the middle part of the limit slider 9 is slidably connected to the outer side of the second polished rod 11, one end of the limit slider 9 is slidably connected to the inner side of the limit groove of the limit wheel 12, and one end of the limit wheel 12 is fixedly connected to a second synchronous wheel 17 The outer wall of the second synchronous wheel 17 is rotatably connected to the upper part of the support plate 15, the outer side of the second synchronous wheel 17 is connected to the synchronous belt 8, the inner side of the synchronous belt 8 away from the second synchronous wheel 17 is connected to the first synchronous wheel 16, the outer wall of the first synchronous wheel 16 is rotatably connected to the upper part of the support plate 15, one end of the first synchronous wheel 16 is fixedly connected to the hand crank 3, the other end of the first synchronous wheel 16 is fixedly connected to the winding wheel 7, the outer wall of the winding wheel 7 is rotatably connected to the upper part of the support plate 15, the other end of the winding wheel 7 is installed with an electrical connection component, and the outer wall of the support plate 15 is fixedly connected to the mutual inductance component.

[0028] Specifically, rotating the hand crank 3 drives the first synchronous wheel 16 to rotate, and then drives the winding wheel 7 to rotate. The first synchronous wheel 16 drives the synchronous belt 8 to rotate, and then drives the second synchronous wheel 17 to rotate, and then drives the limiting wheel 12 to rotate. The outer wall of the limiting wheel 12 is provided with a limiting groove. Since one end of the limiting slider 9 is slidably connected to the inner side of the limiting groove of the limiting wheel 12, the limiting slider 9 is driven to reciprocate. Since the first wire passes through the limiting slider 9, the first wire reciprocates with the limiting slider 9 when being recovered by the winding wheel 7, so that the first wire is evenly wound, which solves the problem that long-distance wires are easily entangled with each other when they are reeled in and out.

[0029] The electrical connection assembly includes a card wheel 18, one end of which is fixedly connected to the end of the winding wheel 7 away from the first synchronization wheel 16, and a conductive column 20 is installed inside the card wheel 18 and the winding wheel 7. The upper surface of the support plate 15 is slidably connected to the connection box 4, and a limiting assembly is installed inside the connection box 4. The outer wall of the connection box 4 is installed with a wiring barrel 23 that cooperates with the conductive column 20, and the other end of the wiring barrel 23 is electrically connected to the second wire 14. One end of the second wire 14 is installed inside the connection box 4, and the other end of the second wire 14 is electrically connected to the inside of the mutual inductance assembly.

[0030] Specifically, one end of the first wire is electrically connected to the end of the conductive column 20 away from the connection box 4, the limit assembly is adjusted, and the connection box 4 is slid to electrically connect the conductive column 20 and the terminal barrel 23. Since the other end of the terminal barrel 23 is electrically connected to the second wire 14, and the other end of the second wire 14 is electrically connected to the inside of the mutual inductance assembly, the two first wires, the two second wires 14 and the mutual inductance assembly form a series circuit, and then the two first wires are electrically connected to the measuring instrument and the protection device, so as to monitor and measure the operation of the power equipment.

[0031] The upper surface of the connection box 4 is slidably connected to the top plate 2, the lower surface of the top plate 2 is fixedly connected to the upper part of the support plate 15, the lower surface of the top plate 2 is fixedly connected to three fixed blocks 27, the outer walls of the three fixed blocks 27 are slidably connected to the upper part of the connection box 4, the upper surface of the support plate 15 is fixedly connected to the slide rail 13, the upper part of the connection box 4 is provided with a groove for installing the three fixed blocks 27, and the lower part of the connection box 4 is provided with a groove for installing the slide rail 13.

[0032] Specifically, the three fixed blocks 27 are located on the same straight line, the outer wall of the slide rail 13 is slidably connected to the inner side of the groove at the bottom of the connection box 4, and a groove for installing the fixed block 27 is opened on the upper part of the connection box 4. The slide rail 13 is parallel to the three fixed blocks 27. The slide rail 13 and the three fixed blocks 27 are used to limit the connection box 4, so that the connection box 4 can reciprocate left and right.

[0033] The limiting assembly includes a trigger 22, the outer wall of the trigger 22 is slidably connected to the inner wall of the connecting box 4, the outer wall of the trigger 22 is fixedly connected to a spring 24, the other end of the spring 24 is fixedly connected to the inner wall of the connecting box 4, the outer wall of the connecting box 4 is fixedly connected to a handle 21, and one end of the trigger 22 is installed on the inner side of the handle 21.

[0034] Specifically, the trigger 22 is moved, the spring 24 is in a compressed state, and the handle 21 is pulled to drive the connection box 4 to move back and forth left and right. When the conductive column 20 and the terminal barrel 23 are electrically connected or separated, the trigger 22 is released, and the spring 24 is used to push the other end of the trigger 22 to the gap between the two fixing blocks 27. The two fixing blocks 27 are used to fix the trigger 22, thereby fixing the connection box 4.

[0035] Several grooves are provided on the outer wall of the card wheel 18, and a hole that cooperates with the card wheel 18 is provided on the outer wall of the connection box 4 near the card wheel 18. The terminal barrel 23 is installed inside the hole that cooperates with the card wheel 18. One end of the conductive column 20 near the connection box 4 is electrically connected to the inner side of the terminal barrel 23, and the other end of the conductive column 20 is electrically connected to the first wire.

[0036] Specifically, the groove of the clamping wheel 18 and the hole of the connection box 4 are used to limit the winding wheel 7, preventing the conductive column 20 and the terminal barrel 23 from rotating relative to each other when electrically connected, thereby reducing errors in monitoring and measuring the operating conditions of the power equipment. In addition, the possibility of the first wire falling off due to the rotation of the winding wheel 7 when the device is stored is reduced, thereby solving the problem of the first wire easily falling off when the device is stored.

[0037] The middle of the limiting slider 9 is provided with through holes for installing the first polished rod 10 and the second polished rod 11 respectively.

[0038] Specifically, the outer wall of the first polished rod 10 and the outer wall of the second polished rod 11 are slidably connected to the inner side of the corresponding mounting hole in the middle of the limit slider 9. The first polished rod 10 and the second polished rod 11 are used to limit the limit slider 9 so that the limit slider 9 can only move back and forth left and right.

[0039] The middle of the limiting slider 9 is rotatably connected to two directional wheels 26 , and one end of the limiting slider 9 is fixedly connected to the third polished rod 19 , and the outer wall of the third polished rod 19 is slidably connected to the inner side of the limiting groove of the limiting wheel 12 .

[0040] Specifically, the first wire is installed between the two directional wheels 26. Since the third polished rod 19 is installed inside the limiting groove of the limiting wheel 12, the limiting slider 9 is driven to reciprocate by the rotation of the limiting wheel 12.

[0041] The mutual inductance component includes an iron core 25, which is divided into an upper iron core and a lower iron core. A coil is wound around the outer wall of the upper iron core, and the two ends of the coil are electrically connected to the second wires 14 on the left and right sides of the upper iron core respectively. An insulating shell 1 is installed on the outside of the iron core 25, and nuts 5 and bolts 6 are installed on the outer walls on both sides of the insulating shell 1. The outer walls on both sides of the insulating shell 1 are respectively fixedly connected to the outer walls of the two support plates 15, and the outer walls of the two top plates 2 are respectively fixedly connected to the outer walls on both sides of the insulating shell 1.

[0042] Specifically, the mutual inductance assembly is a prior art and will not be elaborated here. The iron core 25 is disassembled and installed by disassembling and installing the nut 5 and the bolt 6 .

[0043] Working principle: When the trigger 22 is moved, the spring 24 is in a compressed state, and the handle 21 is pulled to drive the connection box 4 to move back and forth left and right. When the conductive column 20 and the terminal barrel 23 are electrically connected or separated, the trigger 22 is released, and the spring 24 is used to push the other end of the trigger 22 to the gap between the two fixing blocks 27. The two fixing blocks 27 are used to fix the trigger 22, and then fix the connection box 4.

[0044] To reel in the wire, the trigger 22 is pulled, and the connection box 4 is pulled, disconnecting the conductive post 20 from the wire barrel 23. The clamping wheel 18 is separated from the connection box 4, and the trigger 22 is released, causing the other end of the trigger 22 to connect between the two fixed blocks 27. The hand crank 3 is rotated, thereby rotating the first synchronous wheel 16, which in turn drives the winding reel 7. The first synchronous wheel 16 drives the synchronous belt 8, which in turn drives the second synchronous wheel 17, which in turn drives the limiting wheel 12. The outer wall of the limiting wheel 12 has a limiting groove. Because one end of the limiting slider 9 slides inside the limiting groove of the limiting wheel 12, it drives the limiting slider 9 to reciprocate. As the first wire passes through the limiting slider 9, the first wire retracts with the limiting slider 9 when it is reeled in by the winding reel 7, and the first wire is then wound around the winding reel 7. The trigger 22 is pulled again, causing the outer wall of the clamping wheel 18 to connect to the inner side of the hole in the connection box 4, and the outer wall of the conductive post 20 to connect to the inner side of the wire barrel 23.

[0045] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A split current transformer with a retractable wire function, comprising a support plate (15), characterized in that: The upper part of the support plate (15) is rotatably connected to the limiting wheel (12), and the outer wall of the limiting wheel (12) is provided with a limiting groove. The upper part of the support plate (15) is fixedly connected to the first light rod (10) and the second light rod (11). The outer side of the first light rod (10) is slidably connected to the limiting slider (9), and the middle part of the limiting slider (9) is slidably connected to the outer side of the second light rod (11). One end of the limiting slider (9) is slidably connected to the inner side of the limiting groove of the limiting wheel (12). One end of the limiting wheel (12) is fixedly connected to the second synchronous wheel (17), and the outer wall of the second synchronous wheel (17) is rotatably connected to the support plate (1 5), the outer side of the second synchronous wheel (17) is connected to a synchronous belt (8), the inner side of the synchronous belt (8) away from the second synchronous wheel (17) is connected to the first synchronous wheel (16), the outer wall of the first synchronous wheel (16) is rotatably connected to the upper part of the support plate (15), one end of the first synchronous wheel (16) is fixedly connected to a hand crank (3), the other end of the first synchronous wheel (16) is fixedly connected to a winding wheel (7), the outer wall of the winding wheel (7) is rotatably connected to the upper part of the support plate (15), the other end of the winding wheel (7) is installed with an electrical connection component, and the outer wall of the support plate (15) is fixedly connected to a mutual inductance component.

2. The split current transformer with the function of retracting and releasing the wire according to claim 1, characterized in that: The electrical connection assembly includes a card wheel (18), one end of the card wheel (18) is fixedly connected to the end of the winding wheel (7) away from the first synchronous wheel (16), the card wheel (18) and the winding wheel (7) are internally installed with a conductive column (20), the upper surface of the support plate (15) is slidably connected to the connection box (4), the connection box (4) is internally installed with a limit assembly, the outer wall of the connection box (4) is installed with a wiring barrel (23) that cooperates with the conductive column (20), the other end of the wiring barrel (23) is electrically connected to a second wire (14), one end of the second wire (14) is installed inside the connection box (4), and the other end of the second wire (14) is electrically connected to the inside of the mutual inductance assembly.

3. The split current transformer with the function of retracting and releasing the wire according to claim 2, characterized in that: The upper surface of the connection box (4) is slidably connected to a top plate (2), the lower surface of the top plate (2) is fixedly connected to the upper part of the support plate (15), the lower surface of the top plate (2) is fixedly connected to three fixed blocks (27), the outer walls of the three fixed blocks (27) are slidably connected to the upper part of the connection box (4), the upper surface of the support plate (15) is fixedly connected to a slide rail (13), the upper part of the connection box (4) is provided with a groove for installing the three fixed blocks (27), and the lower part of the connection box (4) is provided with a groove for installing the slide rail (13).

4. The split current transformer with the function of retracting and releasing wires according to claim 3, characterized in that: The limiting assembly comprises a trigger (22), the outer wall of the trigger (22) is slidably connected to the inner wall of the connection box (4), the outer wall of the trigger (22) is fixedly connected to a spring (24), the other end of the spring (24) is fixedly connected to the inner wall of the connection box (4), the outer wall of the connection box (4) is fixedly connected to a handle (21), and one end of the trigger (22) is mounted on the inner side of the handle (21).

5. The split current transformer with the function of retracting and releasing the wire according to claim 4, characterized in that: The outer wall of the card wheel (18) is provided with a plurality of grooves, the outer wall of the connection box (4) close to the card wheel (18) is provided with a hole that matches the card wheel (18), the wiring barrel (23) is installed inside the hole that matches the card wheel (18), one end of the conductive column (20) close to the connection box (4) is electrically connected to the inner side of the wiring barrel (23), and the other end of the conductive column (20) is electrically connected to the first wire.

6. The split current transformer with the function of retracting and releasing the wire according to claim 1, characterized in that: The middle of the limiting slide block (9) is provided with through holes for installing the first polished rod (10) and the second polished rod (11).

7. The split current transformer with the function of retracting and releasing wires according to claim 6, characterized in that: The middle of the limiting slider (9) is rotatably connected to two directional wheels (26), one end of the limiting slider (9) is fixedly connected to a third light rod (19), and the outer wall of the third light rod (19) is slidably connected to the inner side of the limiting groove of the limiting wheel (12).

8. The split current transformer with the function of retracting and releasing wires according to claim 5, characterized in that: The mutual inductance component includes an iron core (25), the iron core (25) is divided into an upper iron core and a lower iron core, the outer wall of the upper iron core is wound with a coil, the two ends of the coil are electrically connected to the second wires (14) on the left and right sides of the upper iron core respectively, an insulating shell (1) is installed on the outer side of the iron core (25), nuts (5) and bolts (6) are installed on the outer walls of both sides of the insulating shell (1), the outer walls of both sides of the insulating shell (1) are fixedly connected to the outer walls of the two support plates (15), and the outer walls of the two top plates (2) are fixedly connected to the outer walls of both sides of the insulating shell (1).

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