Current detection device and power distribution cabinet

Abstract

The utility model discloses a current detection device which comprises the components of a box body which is provided with a plurality of frame body mounting holes and is used for placing a cable; the first bracket is arranged on the bracket body mounting hole, the first bracket comprises a plurality of first mounting surfaces, and a plurality of first mounting holes are formed in each first mounting surface; the second support is arranged on one of the first mounting surfaces of the first support, the second support comprises a plurality of second mounting surfaces, and each second mounting surface is provided with a plurality of second mounting holes; the current mutual inductance module comprises an analysis assembly and a plurality of current induction coils, the current induction coils are electrically connected with the analysis assembly, the current induction coils are arranged on the corresponding first mounting holes or the second mounting holes, and shielding plates are arranged on the current induction coils; the current detection device provided by the utility model can adjust the position of the current induction coil so as to adapt to the trend and position of the cable, and also can improve the precision of current detection.

Description

Technical Field

[0001] The utility model relates to the technical field of electric control equipment, in particular to a current detection device and a power distribution cabinet. Background Art

[0002] A distribution cabinet is a device used for switching, controlling or protecting the power generation, transmission, distribution, energy conversion and consumption of a power system. The distribution cabinet can put a part of the power equipment into or out of operation according to the operation needs. It can also quickly remove the faulty part from the system when a power equipment fails, thereby ensuring the normal operation of the fault-free part of the power grid and the safety of the equipment and operation and maintenance personnel.

[0003] The current detection device in the distribution cabinet usually uses an inductive coil based on the principle of electromagnetic induction to sample and detect the current in the cable. In actual installation, since the position of the mounting bracket is fixed, the installation position of the inductive coil is usually also relatively fixed, which is not conducive to adjusting the position and direction of the cable. Utility Model Content

[0004] The following is a summary of the subject matter described in detail herein and is not intended to limit the scope of the claims.

[0005] The utility model provides a current detection device, which can adjust the position of the current induction coil to adapt to the direction and position of the cable and can also improve the accuracy of current detection.

[0006] To achieve the above-mentioned objectives, the first aspect of the present invention provides a current detection device, comprising: a box body, provided with multiple frame mounting holes, the box body is used to place cables; a first bracket, arranged on the frame mounting hole, the first bracket including multiple first mounting surfaces, each of the first mounting surfaces is provided with multiple first mounting holes; a second bracket, arranged on one of the first mounting surfaces of the first bracket, the second bracket including multiple second mounting surfaces, each of the second mounting surfaces is provided with multiple second mounting holes, each of the second mounting holes is elliptical; a current mutual induction module, comprising an analysis component and multiple current induction coils, the current induction coils and the analysis component are electrically connected, each of the current induction coils is respectively arranged on the corresponding first mounting hole or the second mounting hole, the cable passes through the current induction coil, and each of the current induction coils is provided with a shielding plate; wherein the frame mounting hole and the corresponding first mounting hole, as well as the first mounting hole and the corresponding second mounting hole are all connected by bolts.

[0007] In one embodiment, an outer surface of each of the current induction coils is provided with an insulating layer.

[0008] In one embodiment, a first hinge is provided at the connection between each adjacent first mounting surface, and a first friction pad is provided on each first hinge.

[0009] In one embodiment, a second hinge is provided at the connection between each adjacent second mounting surface, and a second friction pad is provided on each second hinge.

[0010] In one embodiment, each of the first mounting holes is in a racetrack shape.

[0011] In one embodiment, the current mutual induction module further includes a movable coil, a pointer and a permanent magnet, the movable coil is connected to the current sensing coil, the movable coil is arranged on one side of the permanent magnet, and the pointer is vertically fixed on the movable coil.

[0012] In one embodiment, the current mutual sensing module further includes a dial, one side of which is provided with a scale, and the dial is provided on one side of the pointer, with the side of the dial with the scale being close to the pointer.

[0013] In one embodiment, a plurality of rotating bases are provided on the second bracket, and the shielding plate is provided on the rotating bases.

[0014] In one embodiment, the analysis component includes a display screen, and the display screen is used to display the current value in the current sensing coil.

[0015] To achieve the above-mentioned object, a second aspect of the present invention provides a power distribution cabinet, comprising the current detection device as described in the first aspect.

[0016] The embodiments of the present application include at least the following beneficial effects: a plurality of frame mounting holes are provided on the box body. When installing the first bracket, based on the position and direction of the cable, the operator can independently select the first mounting surface in contact with the inner wall of the box body and the first mounting hole aligned with the frame mounting hole, so that the current mutual induction module can be installed at a suitable height. By independently selecting the first mounting surface, the first mounting hole and the second mounting hole aligned with the first mounting hole, the current mutual induction module can be rotated to a suitable position. By independently selecting the second mounting hole corresponding to each current sensing coil, the current mutual induction module can be installed at a suitable position. By arranging a shielding plate on each current sensing coil, when the cable is energized and the current sensing coil generates induced current, the shielding plate can prevent the magnetic signal generated by the cable from affecting other current sensing coils, and also prevent the magnetic signal generated by other cables from affecting the current sensing coil where it is located, thereby improving the accuracy of current detection. Therefore, by arranging a shielding plate on the current sensing coil, not only can electromagnetic interference be prevented, but also the operator can be protected from electric shock to a certain extent, thereby improving the safety of the overall device.

[0017] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0019] Figure 1 A schematic diagram of an optional structure of a current detection device provided in an embodiment of the present utility model;

[0020] Figure 2 A schematic diagram of another optional structure of the current detection device provided in an embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of an optional structure of the second bracket provided in an embodiment of the present utility model. DETAILED DESCRIPTION

[0022] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0023] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They 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. Therefore, they cannot be understood as limitations on the present invention.

[0024] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0025] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0026] Currently, in distribution cabinets, inductive coils based on the principle of electromagnetic induction are usually used to sample and detect the current in the cable. Since the position of the mounting bracket is fixed, the installation position of the inductive coil is usually also relatively fixed, which is not conducive to adjusting the position and direction of the cable.

[0027] In response to the problem of mutual interference between adjacent inductive coils, the present invention provides a current detection device, which includes: a box body, provided with a plurality of frame mounting holes, the box body being used to place cables; a first bracket, arranged on the frame mounting hole, the first bracket including a plurality of first mounting surfaces, each of the first mounting surfaces being provided with a plurality of first mounting holes; a second bracket, arranged on one of the first mounting surfaces of the first bracket, the second bracket including a plurality of second mounting surfaces, each of the second mounting surfaces being provided with a plurality of second mounting holes, each of the second mounting holes being elliptical; a current mutual induction module, including an analysis component and a plurality of current induction coils, the current induction coils and the analysis component being electrically connected, each of the current induction coils being respectively arranged on a corresponding first mounting hole or a second mounting hole, the cable passing through the current induction coil, and each of the current induction coils being provided with a shielding plate; wherein the frame mounting hole and the corresponding first mounting hole, as well as the first mounting hole and the corresponding second mounting hole are all connected by bolts; according to the present invention According to the solution provided by the new embodiment, a plurality of frame mounting holes are provided on the box. When installing the first bracket, based on the position and direction of the cable, the operator can independently select the first mounting surface in contact with the inner wall of the box and the first mounting hole aligned with the frame mounting hole, so that the current mutual induction module can be installed at a suitable height. By independently selecting the first mounting surface, the first mounting hole and the second mounting hole aligned with the first mounting hole, the current mutual induction module can be rotated to a suitable position. By independently selecting the second mounting hole corresponding to each current sensing coil, the current mutual induction module can be installed at a suitable position. By arranging a shielding plate on each current sensing coil, when the cable is energized and the current sensing coil generates induced current, the shielding plate can prevent the magnetic signal generated by the cable from affecting other current sensing coils, and also prevent the magnetic signal generated by other cables from affecting the current sensing coil where it is located, thereby improving the accuracy of current detection. Therefore, by arranging a shielding plate on the current sensing coil, not only can electromagnetic interference be prevented, but also the operator can be protected from electric shock to a certain extent, thereby improving the safety of the overall device.

[0028] The following is a further description of the embodiments of the present invention with reference to the accompanying drawings.

[0029] Reference Figures 1 to 3 , an embodiment of the utility model provides a current detection device, comprising:

[0030] The box 100 is provided with a plurality of frame mounting holes, and the box 100 is used to place cables;

[0031] A first bracket 200 is provided on the frame mounting hole. The first bracket 200 includes a plurality of first mounting surfaces 210 . Each of the first mounting surfaces 210 is provided with a plurality of first mounting holes 211 .

[0032] The second bracket 300 is disposed on one of the first mounting surfaces 210 of the first bracket 200. The second bracket 300 includes a plurality of second mounting surfaces 310. Each second mounting surface 310 is provided with a plurality of second mounting holes 311. Each second mounting hole 311 is elliptical.

[0033] A current mutual induction module includes an analysis component and multiple current sensing coils 410. The current sensing coils 410 are electrically connected to the analysis component. Each current sensing coil 410 is respectively installed in the corresponding first mounting hole 211 or second mounting hole 311. The cable passes through the current sensing coil 410. A shielding plate 420 is provided on each current sensing coil 410.

[0034] The frame mounting holes and the corresponding first mounting holes 211 , as well as the first mounting holes 211 and the corresponding second mounting holes 311 are connected via bolts.

[0035] It can be understood that the box body 100 is provided with a plurality of frame mounting holes. When installing the first bracket 200, based on the position and direction of the cable, the operator can independently select the first mounting surface 210 in contact with the inner wall of the box body 100 and the first mounting hole 211 aligned with the frame mounting hole, so that the current mutual induction module can be installed at a suitable height. By independently selecting the first mounting surface 210, the first mounting hole 211 and the second mounting hole 311 aligned with the first mounting hole 211, the current mutual induction module can be rotated to a suitable position. By independently selecting the second mounting hole 311 corresponding to each current sensing coil 410, the current mutual induction module can be rotated to a suitable position. The current mutual inductance module is installed in a suitable position; by arranging a shielding plate 420 on each current sensing coil 410, when the cable is energized and the current sensing coil 410 generates induced current, the shielding plate 420 can prevent the magnetic signal generated by the cable from affecting other current sensing coils 410, and also prevent the magnetic signal generated by other cables from affecting the current sensing coil 410 where it is located, thereby improving the accuracy of current detection. Therefore, by arranging the shielding plate 420 on the current sensing coil 410, not only can electromagnetic interference be prevented, but also the operator can be protected from electric shock to a certain extent, thereby improving the safety of the overall device.

[0036] In a specific embodiment, when some of the first mounting holes 211 on the first bracket 200 are aligned with the frame mounting holes, the first mounting surface 210 where the first mounting holes 211 are located fits against the inner wall of the box 100, thereby preventing the first frame from shaking and ensuring the stability of the current detection device.

[0037] In addition, in one embodiment of the present invention, an outer surface of each current induction coil 410 is provided with an insulating layer.

[0038] It can be understood that the conductive wires in the current sensing coil 410 are provided with insulating enameled wires to ensure mutual insulation between the conductive wires, ensure a constant number of turns in the current sensing coil 410, ensure the detection accuracy of the power induction coil, and prevent short circuits between the conductive wires. By providing an insulating layer on the outer surface of the current sensing coil 410, the probability of a short circuit between the current sensing coil 410 and the first bracket 200 or the second bracket 300 can be reduced, thereby ensuring the safety of the current detection device.

[0039] In addition, in an embodiment of the present invention, a first hinge (not shown in the figure) is provided at the connection between each adjacent first mounting surface 210 , and a first friction pad is provided on each first hinge.

[0040] A second hinge 320 is provided at the connection between each adjacent second mounting surface 310 , and a second friction pad is provided on each second hinge 320 .

[0041] In a specific embodiment, the first bracket 200 includes three first mounting surfaces 210, which are adjacent to each other in sequence. The first hinge includes a first fixed part and two first movable parts. The first fixed part is fixed on the first mounting surface 210 located in the middle, and the first movable part is fixed on the first mounting surfaces 210 located on both sides. A first rotating shaft is provided on both sides of the first fixed part, a first friction pad is provided on the first rotating shaft, and the first movable parts are respectively rotatably connected to the first rotating shaft.

[0042] Reference Figure 3 As shown, in a specific embodiment, the second bracket 300 includes three second mounting surfaces 310, and the three second mounting surfaces 310 are adjacent to each other in sequence. The second hinge 320 includes a second fixed portion 321 and two second movable portions 322. The second fixed portion 321 is fixed on the second mounting surface 310 located in the middle, and the first movable portion is fixed on the second mounting surfaces 310 located on both sides. A second rotating shaft 323 is provided on both sides of the first fixed portion, and a second friction pad is provided on the second rotating shaft 323. The first movable portion is rotatably connected to the second rotating shaft 323 respectively.

[0043] It is understandable that the structure of the first hinge is similar to that of the second hinge 320 , and will not be described in detail here.

[0044] In addition, refer to Figure 2 As shown, each of the first mounting holes 211 is in a runway shape.

[0045] Specifically, the runway-shaped first mounting hole 211 includes a rectangle located in the middle and semicircles located on both sides of the rectangle, the diameter of the semicircle is equal to the width of the rectangle, and a screw hole is provided on the current sensing coil 410, the diameter of the screw hole is equal to the diameter of the semicircle. Therefore, the screw hole can be moved along the length of the rectangle on the first mounting hole 211, so that the installation position of the current sensing coil 410 can be fine-tuned according to the position of the cable, thereby improving the adaptability of the current detection device.

[0046] In addition, in one embodiment of the present application, the current mutual induction module further includes a movable coil, a pointer and a permanent magnet, the movable coil is connected to the current sensing coil 410, the movable coil is arranged on one side of the permanent magnet, and the pointer is vertically fixed on the movable coil.

[0047] The current mutual induction module further includes a dial, one side of which is provided with a scale. The dial is arranged on one side of the pointer, and the side of the dial with the scale is close to the pointer.

[0048] It can be understood that the movable coil is electrically connected to the current sensing coil 410 via a wire, and the movable coil and the wire are rotatably connected. When an induced current is generated in the current sensing coil 410, an induced magnetic field is correspondingly generated on the movable coil. Under the constant magnetic field of the permanent magnet, the movable coil rotates relative to the wire. The pointer is fixed on the movable coil, so the pointer rotates according to the movable coil. The current generated in the current mutual induction module can be determined based on the direction of the pointer on the dial.

[0049] In addition, refer to Figure 3 As shown, a plurality of rotating bases 330 are provided on the second bracket 300 , and the shielding plate 420 is provided on the rotating base 330 .

[0050] It can be understood that by setting a rotating base 330 on the second bracket 300, the shielding plate 420 is set on the rotating base 330. After the current sensing coil 410 is installed, the direction of the shielding plate 420 is adjusted according to the positions of the current sensing coil 410 and the cable, thereby improving the shielding effect of the shielding plate 420 on the magnetic field generated by the remaining current and improving the detection accuracy of the current sensing coil 410.

[0051] In addition, in one embodiment of the present invention, the analysis component includes a display screen (not shown in the figure), which is used to display the current value in the current sensing coil 410.

[0052] It is understandable that by providing a display screen in the current detection device, the display screen can display the reading of the induced current, thereby making it convenient for users to monitor the status of the current detection device and the cable and make timely adjustments.

[0053] In addition, the present invention also provides a power distribution cabinet, comprising the current detection device as described in the above embodiment.

[0054] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A current detection device, characterized in that: include: The box body is provided with a plurality of frame mounting holes, and the box body is used to place cables; A first bracket is arranged on the frame mounting hole, the first bracket includes a plurality of first mounting surfaces, and each of the first mounting surfaces is provided with a plurality of first mounting holes; a second bracket, disposed on one of the first mounting surfaces of the first bracket, the second bracket comprising a plurality of second mounting surfaces, each second mounting surface being provided with a plurality of second mounting holes, each second mounting hole being elliptical; A current mutual induction module includes an analysis component and a plurality of current sensing coils, wherein the current sensing coils are electrically connected to the analysis component, each of the current sensing coils is respectively disposed on a corresponding first mounting hole or second mounting hole, the cable passes through the current sensing coil, and each of the current sensing coils is provided with a shielding plate; Wherein, the frame mounting hole and the corresponding first mounting hole, as well as the first mounting hole and the corresponding second mounting hole are connected by bolts.

2. The current detection device according to claim 1, characterized in that The outer surface of each current induction coil is provided with an insulating layer.

3. The current detection device according to claim 1, characterized in that A first hinge is provided at the connection between each adjacent first mounting surface, and a first friction pad is provided on each first hinge.

4. The current detection device according to claim 1, wherein: A second hinge is provided at the connection between each adjacent second mounting surface, and a second friction pad is provided on each second hinge.

5. The current detection device according to claim 1, wherein: Each of the first mounting holes is in a racetrack shape.

6. The current detection device according to claim 1, wherein: The current mutual induction module further includes a movable coil, a pointer and a permanent magnet. The movable coil is connected to the current induction coil. The movable coil is arranged on one side of the permanent magnet. The pointer is vertically fixed on the movable coil.

7. The current detection device according to claim 6, characterized in that: The current mutual induction module further includes a dial, one side of which is provided with a scale. The dial is arranged on one side of the pointer, and the side of the dial with the scale is close to the pointer.

8. The current detection device according to claim 1, characterized in that: A plurality of rotating bases are arranged on the second bracket, and the shielding plate is arranged on the rotating bases.

9. The current detection device according to claim 1, characterized in that: The analysis component includes a display screen, which is used to display the current value in the current sensing coil.

10. A power distribution cabinet, characterized in that: The device comprises the current detection device according to any one of claims 1 to 9.

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