Electric leakage detection device and electrical cabinet

Abstract

This disclosure provides a leakage current detection device and an electrical cabinet, belonging to the technical field of electrical equipment. The leakage current detection device includes an insulating box, a grounding component, and a detection component. The grounding component is located inside the insulating box, with one end extending through the bottom of the insulating box and grounded. The detection component includes a detection frame and a detection part. One side of the detection frame is connected to the insulating box, and the other side of the detection frame is used to cover the opening of the electrical cabinet to be tested and is connected to the electrical cabinet. The detection part is movably connected to the detection frame and can move relative to the detection frame. The detection part is configured to pass through the opening to perform leakage current detection on the equipment inside the electrical cabinet. This disclosure can automatically perform leakage current detection on the equipment inside the electrical cabinet.

Description

Technical Field

[0001] This disclosure belongs to the field of electrical equipment technology, and specifically relates to a leakage current detection device and an electrical cabinet. Background Technology

[0002] Electrical cabinets are commonly used to assemble various sensing, detection and other electromechanical equipment. In actual use, if there is a leakage in the internal equipment, workers may come into contact with the equipment without knowing it, which can easily lead to safety accidents.

[0003] In related technologies, a leakage current tester is needed to detect whether there is a leakage current in the equipment inside the electrical cabinet. During the test, the worker holds the tester and checks each piece of equipment inside the electrical cabinet one by one.

[0004] However, using a test pen to detect whether a device is leaking electricity is not only inefficient, but also poses certain safety hazards. Summary of the Invention

[0005] This disclosure provides a leakage current detection device and an electrical cabinet, which can automatically detect leakage current in the equipment inside the electrical cabinet, improving detection efficiency and safety. The technical solution is as follows: This disclosure provides a leakage current detection device, which includes an insulating box, a grounding component, and a detection component. The grounding component is located inside the insulating box, with one end extending through the bottom of the insulating box and grounded. The detection component includes a detection frame and a detection part. One side of the detection frame is connected to the insulating box, and the other side of the detection frame is used to cover the opening of the electrical cabinet to be tested and is connected to the electrical cabinet. The detection part is movably connected to the detection frame and can move relative to the detection frame. The detection part is electrically connected to the grounding component and is configured to pass through the opening to perform leakage current detection on the equipment inside the electrical cabinet to be tested.

[0006] In another implementation of this disclosure, the detection component includes a leakage current detection board and a detection unit. The leakage current detection board is located inside the detection frame and is slidably connected to the detection frame. The detection unit includes an insulating cylinder, a conductive post, and a detection head. The insulating cylinder is located on the side of the leakage current detection board away from the insulating box, and one end of the insulating cylinder is connected to the leakage current detection board. The conductive post is located inside the insulating cylinder and is mechanically connected to the insulating cylinder. One end of the conductive post is electrically connected to the leakage current detection board. One end of the detection head is mechanically connected to the other end of the conductive post and is electrically connected to the conductive post. The other end of the detection head is located outside the insulating cylinder and is used to contact the equipment of the electrical cabinet to be tested.

[0007] In another implementation of this disclosure, the testing frame includes a support base and two side plates, the two side plates being arranged opposite to each other and connected to the same side of the support base, the two side plates and the support base defining a U-shaped cavity for accommodating the electrical cabinet to be tested and communicating with the opening of the electrical cabinet, the support base having an accommodating cavity for accommodating the leakage current detection board.

[0008] In another implementation of this disclosure, the testing frame further includes two extrusion plates and two adjusting rods. The two extrusion plates are located inside the U-shaped cavity and on opposite sides of the opening of the U-shaped cavity. The two adjusting rods are arranged in a one-to-one correspondence with the two extrusion plates and the two side plates. The two ends of each adjusting rod are connected to the corresponding extrusion plate and the corresponding side plate, respectively, and the middle part of the adjusting rod is threadedly connected to the corresponding side plate.

[0009] In another implementation of this disclosure, the detection assembly further includes a locking unit, which includes a limiting plate, a pull rod, a first locking plate, and a second locking plate. One side of the limiting plate is located outside the detection frame, the middle part of the limiting plate is slidably connected to the detection frame, and the other side of the limiting plate is connected to the leakage current detection plate. One end of the pull rod is slidably connected to the limiting plate, and the other end is located outside the limiting plate. The moving direction of the pull rod relative to the limiting plate is perpendicular to the moving direction of the limiting plate following the leakage current detection plate. The first locking plate is located inside the limiting plate and is connected to the pull rod. The second locking plate is connected to the detection frame and is used to engage with the first locking plate to prevent the limiting plate from moving.

[0010] In another implementation of this disclosure, the grounding assembly includes a grounding wire, a grounding outer box, and a hot air blower; the grounding outer box is located inside the insulating box, the grounding outer box has a double-layer structure, and there is a cavity between the two layers of the grounding outer box, the cavity being connected to the interior of the grounding outer box and the exterior of the insulating box; the middle part of the grounding wire is located inside the grounding outer box and is rotatably connected to the grounding outer box, one end of the grounding wire is located outside the grounding outer box and the insulating box and is grounded; the hot air blower is located inside the insulating box and is connected to the side wall of the insulating box, and the air outlet of the hot air blower is connected to the cavity.

[0011] In another implementation of this disclosure, the grounding outer box is rotatably connected to the insulating box, and the axial direction of the rotation axis of the grounding outer box is the same as the height direction of the insulating box; the grounding assembly further includes a drive motor, a driving gear, and a driven gear, the drive motor is connected to the inner sidewall of the insulating box, the driving gear is coaxially connected to the output shaft of the drive motor, the driven gear is sleeved on the outer periphery of the grounding outer box and connected to the grounding outer box, and the driven gear meshes with the driving gear.

[0012] In another implementation of this disclosure, the leakage current detection device further includes a lifting assembly located inside the insulating box. The lifting assembly includes a telescopic rod and a connecting ring. One end of the telescopic rod is connected to the top of the insulating box, and the other end of the telescopic rod is connected to one end of the connecting ring. The other end of the connecting ring is rotatably connected to the top of the grounding outer box and connected to the grounding wire. The axial direction of the connecting ring and the telescopic direction of the telescopic rod are both the same as the height direction of the insulating box.

[0013] In another implementation of this disclosure, the leakage current detection device further includes a counterweight, which is located on top of the insulation box and connected to the insulation box.

[0014] In another implementation of this disclosure, an electrical cabinet is also provided, the electrical cabinet including a cabinet body with an opening and a leakage current detection device as described above, the leakage current detection device being connected to the opening.

[0015] The beneficial effects of the technical solutions provided in this disclosure are: Since the testing assembly includes a testing frame and a testing component, with one side of the testing frame connected to the insulating box and the other side used to cover the opening of the electrical cabinet to be tested and connected to the electrical cabinet, the testing device can be connected to the outside of the electrical cabinet to be tested via the testing frame during testing. Simultaneously, since the testing component is movable and can pass through the opening of the electrical cabinet to perform leakage current detection on the equipment inside, the movement of the testing component can be controlled so that it can extend into the electrical cabinet and contact the equipment inside, thereby achieving leakage current detection.

[0016] As can be seen, the above testing device does not require manual testing by workers. It only requires controlling the movement of the testing frame and making the testing components contact the equipment inside the electrical cabinet to perform leakage current detection, which greatly improves the testing efficiency and the safety of the testing process. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a leakage current detection device provided in an embodiment of the present disclosure; Figure 2 for Figure 1 A top view of the detection components; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 2 Enlarged view at point B in the middle; Figure 5 for Figure 1 Enlarged view at point C; Figure 6 for Figure 1 Enlarged view of point D in the middle.

[0019] The symbols in the diagram represent the following meanings: 1. Insulation box; 11. Outer protective box; 12. Sealing box; 13. Absorbent sponge; 14. Sealing ring; 141. Second dovetail ring; 15. Sealing strip; 2. Grounding assembly; 21. Grounding wire; 22. Grounding enclosure; 220. Cavity; 2200. Guide hole; 23. Hot air blower; 24. Drive motor; 25. Drive gear; 26. Driven gear; 27. Sealing ring; 2202. Limiting ring; 3. Detection Components; 31. Detection Frame; 311. Support Base; 312. Side Plate; 3120. Through Slot; 310. U-shaped Cavity; 3110. Accommodating Cavity; 313. Extrusion Plate; 314. Adjusting Rod; 315. Second Partition; 32. Detection Components; 321. Leakage Detection Plate; 3211. Detection Plate Body; 3212. First Partition; 322. Detection Unit; 3221. Insulating Cylinder; 3222. Conductive Post; 3223. Detection Head; 3224. Rubber Elastic Component; 3225. Slider; 33. Locking Unit; 331. Limiting Plate; 3310. Mounting Slot; 332. Pull Rod; 333. First Locking Plate; 334. Second Locking Plate; 335. Locking Elastic Component; 4. Lifting assembly; 41. Telescopic rod; 42. Connecting ring; 421. Main ring body; 422. First dovetail ring; 5. Counterweight; 6. Display; 7. Audible alarm; 8. Light-emitting diode; 100. Electrical cabinet; 101. Equipment. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0021] This disclosure provides a leakage current detection device, such as... Figure 1 As shown, the leakage current detection device includes an insulating box 1, a grounding component 2, and a detection component 3. The grounding component 2 is located inside the insulating box 1, and one end extends out of the bottom of the insulating box 1 and is grounded.

[0022] Figure 2 for Figure 1 A top view of the detection component, combined with Figure 2 The testing assembly 3 includes a testing frame 31 and a testing component 32. One side of the testing frame 31 is connected to the insulation box 1, and the other side of the testing frame 31 is used to cover the opening of the electrical cabinet 100 to be tested and is connected to the electrical cabinet. The opening of the electrical cabinet is connected to the interior of the electrical cabinet.

[0023] The detection component 32 is movably connected to the detection frame 31, and the detection component 32 is movable relative to the detection frame 31. The detection component 32 is electrically connected to the grounding component 2. The detection component 32 is configured to pass through the opening of the electrical cabinet 100 to perform leakage current detection on the equipment 101 inside the electrical cabinet 100.

[0024] When the leakage current detection device provided in this embodiment detects whether equipment in an electrical cabinet is leaking current, since the leakage current detection device includes an insulating box 1, a grounding component 2, and a detection component 3, the insulating box 1 can provide an installation foundation for the grounding component 2 and the detection component 3. At the same time, the grounding component 2 ensures that the detection device is grounded during use, greatly improving safety.

[0025] Since the detection assembly 3 includes a detection frame 31 and a detection component 32, and one side of the detection frame 31 is connected to the insulation box 1, while the other side is used to cover the opening of the electrical cabinet to be tested and is connected to the electrical cabinet 100, during testing, the detection frame 31 can be moved and pass through the opening of the electrical cabinet 100, allowing the detection component 32 to extend into the electrical cabinet and contact the equipment inside, thereby achieving leakage current detection. Furthermore, since the detection component 32 is electrically connected to the grounding assembly 2, the detection component 32 can be led to the ground through the grounding assembly 2 when detecting leakage current, improving the safety of the detection.

[0026] As can be seen, the above testing device does not require manual testing by workers. It only requires controlling the movement of the testing frame 31 and making the testing component 32 contact the equipment 101 inside the electrical cabinet 100 to perform leakage current detection on the equipment 101, which greatly improves the testing efficiency and the safety of the testing process.

[0027] In this embodiment, to facilitate the connection of the detection device to the electrical cabinet to be tested, the rear shell of the electrical cabinet 100 can be removed beforehand to create an opening. Then, the detection frame 31 is placed over the opening and connected to the cabinet body. This allows the detection component 32 to extend into the electrical cabinet and contact the equipment inside, thereby enabling leakage current detection.

[0028] In addition, to facilitate the inspection frame 31 passing through the opening of the electrical cabinet 100, the inspection frame 31 is movable, and the direction of movement is perpendicular to the height direction of the insulation box 1. That is, the inspection frame 31 moves horizontally to pass through the opening of the electrical cabinet 100.

[0029] Optionally, the detection component 32 includes a leakage current detection board 321 and a detection unit 322. The leakage current detection board 321 is located inside the detection frame 31 and is slidably connected to the detection frame 31.

[0030] One end of the detection unit 322 along the moving direction of the detection component 32 is connected to the leakage current detection board 321, and the other end is used to contact the equipment of the electrical cabinet to be tested. One end of the detection unit 322 can extend and retract relative to the other end along the moving direction of the detection component 32.

[0031] In the above implementation, the leakage current detection board 321 is electrically connected to the detection unit 322 to determine whether the device contacted by the detection unit 322 is leaking current. The detection component 32 is used to contact the device. For example, the leakage current detection board 321 has a current detection circuit. When the device detected by the detection unit 322 has a leakage current (e.g., the device casing or the live wire connection is live), the current detection circuit in the leakage current detection board 321 will detect the current, and the detected current will be greater than a set threshold. Conversely, when the device detected by the detection unit 322 does not have a leakage current, the current detection circuit in the leakage current detection board 321 will have difficulty detecting the current or the detected current will not be greater than the set threshold. The current detection circuit is a closed circuit connected to an ammeter.

[0032] In this embodiment of the disclosure, in order to simultaneously detect different devices within the electrical cabinet 100, there are multiple detection units 322. These multiple detection units 322 are arranged in multiple columns along a first direction, and the multiple detection units 322 in each column are arranged at intervals along a second direction. The first direction and the second direction are perpendicular to each other and are both perpendicular to the movement direction of the detection component 32.

[0033] This allows for the separate testing of different devices within the electrical cabinet by arranging multiple testing units 322.

[0034] For example, the multiple detection units 322 can also be arranged in a manner that corresponds one-to-one with multiple devices in the electrical cabinet.

[0035] Figure 3 for Figure 2 Enlarged view of point A in the middle, combined with Figure 3 Optionally, the detection unit 322 includes an insulating cylinder 3221, a conductive post 3222, and a detection head 3223. The insulating cylinder 3221 is located on the side of the leakage current detection board 321 away from the insulating box 1, and one end of the insulating cylinder 3221 is connected to the leakage current detection board 321. The conductive post 3222 is located inside the insulating cylinder 3221 and is mechanically connected to the insulating cylinder 3221. One end of the conductive post 3222 is electrically connected to the leakage current detection board 321. One end of the detection head 3223 is mechanically connected to the other end of the conductive post 3222, and the detection head 3223 is electrically connected to the conductive post 3222. The other end of the detection head 3223 is located outside the insulating cylinder 3221 and is used to contact the equipment of the electrical cabinet to be tested.

[0036] In the above implementation, the insulating cylinder 3221 is used to protect the conductive post 3222 and the detection head 3223. The conductive post 3222 is used to electrically connect the leakage current detection board 321 and the detection head 3223 together. The detection head 3223 is used to contact the equipment inside the electrical cabinet for leakage current detection.

[0037] Optionally, the detection unit 322 further includes a rubber elastic element 3224, which is sleeved around the middle of the detection head 3223 and its two ends abut against the other end of the detection head 3223 and the conductive post 3222, respectively.

[0038] In the above implementation, during use, when the leakage current detection board 321 moves forward toward the equipment, it causes multiple detection heads 3223 to move toward the outer casing of the equipment inside the electrical cabinet, thereby bringing the detection heads 3223 into contact with the equipment casing. At this time, the rubber elastic element 3224 is in a compressed state. Therefore, even if the electrical cabinet vibrates, the elastic force of the rubber elastic element 3224 can still allow the detection heads 3223 to make contact with the equipment, avoiding poor contact caused by vibrations during normal operation of the electrical cabinet, thus ensuring accurate contact conductivity. When leakage occurs in the equipment, the detection heads 3223 can successfully transmit the electrical signal to the leakage current detection board 321 for judgment.

[0039] For example, the rubber elastic element 3224 is a rubber spring. This ensures that the detection head 3223 and the conductive post 3222 are not electrically connected through the rubber elastic element 3224, thus preventing short circuits or leakage caused by the metal spring conducting electricity between the detection head 3223 and the conductive post 3222.

[0040] In this embodiment, to prevent the detection head 3223 from shaking during movement, the inner wall of the insulating cylinder 3221 at the end away from the leakage current detection plate 321 has two sliding grooves. The two sliding grooves are arranged opposite to each other, and the extension direction of each sliding groove is the axial direction of the insulating cylinder 3221. The detection unit 322 also includes two sliders 3225, which are located on opposite sides of the detection head 3223 and are both connected to the detection head 3223. The two sliders 3225 are arranged in a one-to-one correspondence with the two sliding grooves. Each slider 3225 is located in its corresponding sliding groove.

[0041] For example, the detection head 3223 is a cylindrical metal connector, with one end of the detection head 3223 facing the device 101 having a spherical surface. This allows for electrical connection between the detection head 3223 and the device through a metal structure, enabling lossless transmission of detectable signals (such as voltage and current) to the leakage current detection board 321. By making one side of the detection head 3223 spherical, it is possible for the detection head 3223 to conform closely to the slightly uneven or curved outer wall of the device, achieving a tight contact. Furthermore, the spherical surface has no sharp edges, preventing scratches to the device.

[0042] See you again Figure 2 Optionally, the testing frame 31 includes a support base 311 and two side plates 312. The two side plates 312 are arranged opposite to each other and are connected to the same side of the support base 311. The two side plates 312 and the support base 311 define a U-shaped cavity 310 for accommodating the electrical cabinet to be tested. The support base 311 has a receiving cavity 3110 for accommodating the leakage current detection board 321. The detection unit 322 passes through the support base 311 and is partially located in the U-shaped cavity 310.

[0043] In the above implementation, the support base 311 provides a mounting foundation for the leakage current detection board 321 and the two side plates 312. The two side plates 312, together with the support base 311, define a U-shaped cavity 310 for accommodating the electrical cabinet to be tested. Thus, when the electrical cabinet to be tested needs to be tested, the support base 311 can cover the opening of the electrical cabinet, and the two side plates 312 can surround the outer perimeter of the electrical cabinet.

[0044] Optionally, the testing frame 31 also includes two pressing plates 313 and two adjusting rods 314, with the two pressing plates 313 located inside the U-shaped cavity 310 and on opposite sides of the opening of the U-shaped cavity 310.

[0045] Two adjusting rods 314 are arranged in a one-to-one correspondence with two extrusion plates 313 and two side plates 312. The two ends of each adjusting rod 314 are connected to the corresponding extrusion plate 313 and the corresponding side plate 312, respectively. The middle part of the adjusting rod 314 is threadedly connected to the corresponding side plate 312.

[0046] In the above implementation, the arrangement of the adjusting rod 314 allows the extrusion plate 313 to be connected to the corresponding side plate 312, etc. So, during testing, when the two side plates 312 surround the outer periphery of the electrical cabinet, the adjusting rod 314 can be rotated to make the extrusion plate 313 fit against the outer wall of the electrical cabinet, thereby clamping the electrical cabinet and fixing the testing frame to the electrical cabinet.

[0047] In this embodiment, the adjusting rod 314 is a screw for easy adjustment.

[0048] In actual use, the rear shell of the electrical cabinet can be opened and removed first, and then the test frame 31 in this device can be put on the back of the electrical cabinet so that the extrusion plate 313 can fit against the side wall of the electrical cabinet. At the same time, the support base 311 can act as the rear shell of the electrical cabinet, thereby ensuring that the internal heat dissipation and ventilation of the electrical cabinet will not be affected during testing.

[0049] In this embodiment, the adjusting rod 314 is a T-shaped rod, and the end of the adjusting rod 314 connected to the corresponding side plate 312 has a T-shaped head. The T-shaped head is located on the side of the side plate 312 away from the extrusion plate 313. The presence of the T-shaped head ensures that the adjusting rod 314 will not detach from the connected side plate 312.

[0050] In addition, since electrical cabinets are generally rectangular structures with symmetrical designs, the two side plates 312 are arranged symmetrically, and the two pressing plates 313 are also symmetrical structures. Their axes of symmetry are coaxial and their axial directions are the same as the moving direction of the detection component 32.

[0051] In this embodiment, to ensure a sealed contact between the leakage current detection board 321 and the detection frame 31, preventing moisture from affecting its normal operation, the leakage current detection board 321 includes a detection board body 3211 and two first partitions 3212. The two first partitions 3212 are spaced apart along the arrangement direction of the two side plates 312 and are both located on the same side of the detection board body 3211 facing the insulation box 1. Both first partitions 3212 are connected to the detection board body 3211. Simultaneously, the detection frame 31 also includes two second partitions 315, located within the support base 311 and spaced apart along the arrangement direction of the two side plates 312, situated between the two first partitions 3212. Each second partition 315 is connected to the inner wall of the support base 311 on the side closest to the insulation box 1. Each second partition 315 corresponds one-to-one with each of the two first partitions 3212, and each second partition 315 is in sliding contact with its corresponding first partition 3212. Both the first partition 3212 and the second partition 315 are rubber sheets.

[0052] Figure 4 for Figure 2 Enlarged view at point B, combined with Figure 4 Optionally, the detection assembly 3 also includes a locking unit 33, which includes a limiting plate 331, a pull rod 332, a first locking plate 333 and a second locking plate 334. One side of the limiting plate 331 is located outside the detection frame 31, the middle part of the limiting plate 331 is slidably connected to the detection frame 31, and the other side of the limiting plate 331 is connected to the leakage current detection plate 321.

[0053] One end of the pull rod 332 is located in and slidably connected to the limiting plate 331, while the other end is located outside the limiting plate 331. The direction of movement of the pull rod 332 relative to the limiting plate 331 is perpendicular to the direction of movement of the limiting plate 331 following the leakage current detection plate 321. The first locking plate 333 is located inside the limiting plate 331 and is connected to the pull rod 332. The second locking plate 334 is located outside the detection frame 31 and is connected to the support seat 311 in the detection frame 31. The second locking plate 334 is used to engage with the first locking plate 333 to prevent the limiting plate 331 from moving.

[0054] In the above implementation, the locking unit 33 is used to restrict the movement of the leakage current detection plate 321. During detection, after the leakage current detection plate 321 is moved into position and the detection head 3223 has made contact with the equipment in the electrical cabinet to be tested, the pull rod 332 in the locking unit 33 can be controlled. Moving the pull rod 332 allows the first locking plate 333 to engage with the second locking plate 334 and lock them together, thereby preventing the limit plate 331 and the leakage current detection plate 321 from moving. Conversely, when it is necessary to readjust the position of the leakage current detection plate 321, the pull rod 332 is pulled to move the first locking plate 333 away from the second locking plate 334, separating the first locking plate 333 from the second locking plate 334. Then, moving the limit plate 331 will move the leakage current detection plate 321 along with it.

[0055] In this embodiment, the pull rod 332 is a T-shaped rod, and the T-shaped head of the pull rod 332 is located outside the limiting plate 331 to prevent the pull rod 332 from being completely inside the limiting plate 331 and thus unable to operate. The first locking plate 333 is a toothed plate, and the first locking plate 333 is connected to the end of the pull rod 332 facing the leakage detection plate 321.

[0056] The second locking plate 334 is also a T-shaped plate, and the T-shaped head of the second locking plate 334 is connected to the outer wall of the insulation box 1. The rod of the second locking plate 334 is provided with a toothed plate that meshes with the first locking plate 333.

[0057] Optionally, the locking unit 33 further includes a locking elastic element 335, which is sleeved outside the pull rod 332 and located inside the limiting plate 331. The two ends of the locking elastic element 335 abut against the inner wall of the limiting plate 331 and the side of the first locking plate 333 away from the second locking plate 334, respectively.

[0058] In the above implementation, the arrangement of the locking elastic element 335 allows the pull rod 332 to automatically retract into the limiting plate 331 after the external force is removed, thereby making the first locking plate 333 engage with the second locking plate 334.

[0059] In other words, when the leakage current detection plate 321 needs to be moved, first pull the lever 332 outward, causing the locking elastic element 335 to be compressed, thereby separating the first locking plate 333 and the second locking plate 334 from engagement. Then, moving the limiting plate 331 will move the leakage current detection plate 321. Once the leakage current detection plate 321 has moved to the appropriate position, release the lever 332. In this way, under the action of the locking elastic element 335, the first locking plate 333 and the second locking plate 334 will re-engage, thus forming a limit.

[0060] For example, the locking elastic element 335 is a metal spring.

[0061] In this embodiment, the end of the support base 311 has a through groove 3120 for the movement and installation of the limiting plate 331. One end of the through groove 3120 communicates with the outside of the support base 311, and the other end communicates with the receiving cavity 3110 of the support base 311. The middle part of the limiting plate 331 is located in the through groove 3120. The limiting plate 331 has a mounting groove 3310 for the movement and installation of the pull rod 332. One side of the second locking plate 334 passes through the mounting groove 3310 and engages with the first locking plate 333.

[0062] See you again Figure 1 Optionally, the grounding assembly 2 includes a grounding wire 21 and a grounding outer box 22. The grounding outer box 22 is located in the insulating box 1. The grounding outer box 22 has a double-layer structure, and there is a cavity 220 between the two layers of the grounding outer box 22. The cavity 220 is connected to the interior of the grounding outer box 22 and the exterior of the insulating box 1.

[0063] The middle part of the grounding wire 21 is located in the grounding outer box 22 and is rotatably connected to the grounding outer box 22. One end of the grounding wire 21 is located outside the grounding outer box 22 and the insulation box 1 and is grounded.

[0064] The grounding assembly 2 also includes a hot air blower 23, which is located inside the insulation box 1 and connected to the side wall of the insulation box 1. The air outlet of the hot air blower 23 is connected to the cavity.

[0065] In the above implementation, grounding wire 21 is used for grounding, enabling the leakage current detection device to be grounded. Grounding enclosure 22 is used to protect grounding wire 21. Hot air blower 23 is used to blow hot air into the grounding enclosure 22 and out through the cavity 220 of the grounding enclosure 22 to prevent moisture from accumulating around grounding wire 21 and grounding enclosure 22, ensuring that the contact point between grounding wire 21 and the ground remains dry. If the contact point is damp, voltage can easily dissipate to the surrounding area, increasing the risk of electric shock. In other words, the hot air generated after the hot air blower 23 is started can effectively dry the grounding wire 21 and the bottom outer perimeter of the grounding enclosure 22, reducing the risk of electric shock.

[0066] For example, the grounding wire 21 is a columnar structure made of wound stainless steel wire. This ensures that it has sufficient strength to prevent deformation due to vibration, which would make grounding difficult. At the same time, the grounding wire 21 is electrically connected to the leakage current detection board 321 through a conductor.

[0067] Optionally, the grounding outer box 22 is rotatably connected to the insulation box 1, and the axis of rotation of the grounding outer box 22 is oriented in the same direction as the height of the insulation box 1 (i.e., the direction of rotation of the insulation box 1). Figure 1 In the direction 'a' from bottom to top, Figure 2 The direction in the middle is perpendicular to the direction inwards from the paper (b) and is the same.

[0068] The grounding assembly 2 also includes a drive motor 24, a driving gear 25, and a driven gear 26. The drive motor 24 is connected to the inner wall of the insulating box 1. The driving gear 25 is coaxially connected to the output shaft of the drive motor 24. The driven gear 26 is sleeved on the outer periphery of the grounding outer box 22 and is fixedly connected to the grounding outer box 22. The driven gear 26 meshes with the driving gear 25.

[0069] When the drive motor 24 is started, the drive gear 25 can rotate. After the drive gear 25 rotates, it can drive the driven gear 26 and the grounding outer box 22 to rotate. This allows the hot air blown into the grounding outer box 22 by the hot air blower 23 to be distributed more evenly, ensuring that the ground is dry.

[0070] In this embodiment, for ease of connection, the grounding outer casing 22 has a double-layer cylindrical structure. An annular cavity 220 is formed between the two cylindrical layers of the grounding outer casing 22. Multiple guide holes 2200 are spaced apart on the outer cylindrical wall defining the cavity 220 and near the bottom. Each guide hole 2200 communicates with the cavity 220, the grounding outer casing 22, and the outside of the insulating box 1. The guide holes 2200 are arranged in multiple groups along the axis of the cavity 220, with each group of guide holes 2200 evenly spaced along the circumference of the annulus containing the cavity 220. Furthermore, to ensure that the hot air blown through the guide holes 2200 reaches the outer periphery of the grounding outer casing 22 as far as possible, the angle formed between the axial direction of each guide hole 2200 and the direction from the top of the cavity 220 to the bottom of the insulating box 1 is an acute angle.

[0071] In addition, to ensure a sealed connection while the hot air blower 23 does not need to rotate synchronously with the grounding outer casing 22, the grounding assembly 2 also includes a sealing ring 27. The sealing ring 27 is embedded in the outer cylindrical wall of the grounding outer casing 22 and is rotatably connected to the grounding outer casing 22. The air outlet of the hot air blower 23 is connected to one end of a duct, and the other end of the duct passes through the sealing ring 27 and extends into the cavity 220 of the grounding outer casing 22.

[0072] Figure 5 for Figure 1 Enlarged view at point C, combined with Figure 5 In this embodiment, to ensure that the sealing ring 27 can be stably rotatably connected to the grounding outer casing 22, the sealing ring 27 is provided with multiple annular limiting ring grooves. These limiting ring grooves are arranged in pairs, and the two pairs of limiting ring grooves are concentric. Correspondingly, the grounding outer casing 22 has limiting rings 2202 arranged one-to-one with the multiple limiting ring grooves, and each limiting ring 2202 is located in its corresponding limiting ring groove. The two pairs of limiting rings 2202 are located on the inner and outer sides of the outer wall of the grounding outer casing 22, respectively.

[0073] For example, there are four limiting rings 2202, two of which are arranged in pairs and located at one end of the sealing ring 27, and the other two are arranged in pairs and located at the other end of the sealing ring 27.

[0074] In this embodiment, the sealing ring 27 can be a rubber ring structure.

[0075] See you again Figure 1 Optionally, the leakage current detection device also includes a lifting assembly 4, which is located inside the insulation box 1. The lifting assembly 4 includes a telescopic rod 41 and a connecting ring 42. One end of the telescopic rod 41 is connected to the inner top wall of the insulation box 1. The other end of the telescopic rod 41 is connected to one end of the connecting ring 42. The telescopic rod 41 can drive the connecting ring 42 to move along its own axis.

[0076] The connecting ring 42 is located at the top of the grounding outer box 22. The other end of the connecting ring 42 is rotatably connected to the top of the grounding outer box 22 and fixedly connected to the grounding wire 21. The connecting ring 42 can rotate relative to the grounding outer box 22. The axial direction of the connecting ring 42 and the extension and retraction direction of the telescopic rod 41 are both the same as the height direction of the insulating box 1.

[0077] In the above implementation, the lifting component 4 is used to control the position and height of the grounding outer box 22, thereby controlling whether the grounding wire 21 is grounded.

[0078] In actual use, the telescopic rod 41 ensures that the grounding wire 21 makes smooth contact with the ground. When the telescopic rod 41 retracts, it moves the connecting ring 42 upwards, which in turn moves the grounding outer box 22 and the grounding wire 21 upwards simultaneously. This lifts the grounding wire 21, preventing it from constantly contacting and rubbing against the ground during movement, thus avoiding impact on its service life. Conversely, when it is necessary to control the grounding of the grounding wire 21, simply extend the telescopic rod 41.

[0079] Combination Figure 1 and Figure 5 Furthermore, to ensure that the connecting ring 42 is unaffected by the rotation of the grounding outer casing 22, the connecting ring 42 includes a main ring body 421 and a first dovetail ring 422. The first dovetail ring 422 is located at the end of the main ring body 421 facing the grounding outer casing 22 and is coaxially connected to the main ring body 421. The top of the grounding outer casing 22 has a first dovetail groove, and the first dovetail ring 422 is located in the first dovetail groove and rotatably engages with the first dovetail groove. The inner ring wall of the main ring body 421 is connected to the outer wall of the grounding wire 21 through radially arranged connecting rods (not shown in the figure).

[0080] Combination Figure 1Optionally, the insulation box 1 includes an outer protective box 11, a sealed box 12, an absorbent sponge 13, and a sealing ring 14. The sealed box 12 is located inside the bottom of the outer protective box 11 and is connected to the outer protective box 11. The bottom of the grounding outer box 22 and the grounding wire 21 are both located inside the sealed box 12. The absorbent sponge 13 is located in the sealed box 12 and covers the inner wall of the sealed box 12, and is connected to the inner wall of the sealed box 12. The sealing ring 14 is located inside the sealed box 12, with one end rotatably connected to the grounding outer box 22 and the other end located on the ground.

[0081] To further ensure the ground is dry, a sealed box 12 is provided to initially maintain a seal. The absorbent sponge 13 can further absorb moisture, and the sealing ring 14 ensures that the grounding outer box 22 contacts the ground and fits tightly.

[0082] For example, in order to ensure that the sealing ring 14 can make tight contact with the ground, a silicone gasket is attached to the bottom of the sealing ring 14.

[0083] In this embodiment, the sealing ring 14 and the grounding outer box 22 are also rotatably connected by a structure such as a dovetail ring.

[0084] Figure 6 for Figure 1 Enlarged view at point D, combined with Figure 6 The top of the sealing ring 14 has a second dovetail ring 141, and the bottom of the grounding outer box 22 has a second dovetail ring groove. The second dovetail ring 141 is located in the second dovetail ring groove, and the two are rotatably engaged.

[0085] Optionally, the insulation box 1 further includes an annular sealing strip 15, which is located inside the sealing ring 14 and sandwiched between the sealing ring 14 and the sliding connection position of the grounding outer box 22. The sealing strip 15 can further increase the sealing performance between the grounding outer box 22 and the sealing ring 14.

[0086] Combination Figure 1 Optionally, the leakage current detection device also includes a counterweight 5, which is located on top of the insulation box 1 and connected to the insulation box 1.

[0087] The arrangement of the counterweight 5 allows the insulation box 1 to be in close contact with the ground during installation, thus facilitating the grounding wire 21 to contact the ground.

[0088] Optionally, the leakage current detection device also includes a display 6, an audible alarm 7, and a light-emitting diode (LED) 8. The display 6 is located outside the insulating box 1 and connected to the side wall of the insulating box 1. The audible alarm 7 and the LED 8 are both located inside the insulating box 1 and are electrically connected to the leakage current detection board 321 via wires. When a leakage current occurs, the detection head 3223 can smoothly transmit the electrical signal (current magnitude in this embodiment) to the leakage current detection board 321. The leakage current detection board 321 detects that the current is greater than a set threshold, and then emits a light signal through the LED 8, transmitting the current magnitude to the display 6 for display. At the same time, the audible alarm 7 emits a warning sound. This arrangement can promptly display and alert personnel when a leakage current occurs in the equipment.

[0089] On the other hand, this disclosure also provides an electrical cabinet, which includes a cabinet body with an opening and the aforementioned leakage current detection device connected to the opening.

[0090] The above electrical cabinets have the same beneficial effects as the aforementioned leakage current detection devices, and will not be described in detail here.

[0091] The following is a brief description of the working process of the leakage current detection device provided in this embodiment: First, place the leakage current detection device on the cabinet of the electrical cabinet to be tested, control the rotation of the grounding outer box 22, and simultaneously control the hot air blower 23 to blow air out of the grounding outer box 22 to reduce moisture and humidity around the grounding wire 21. Next, control the lifting component 4, extend the telescopic rod 41, and lower the grounding outer box 22 with the grounding wire 21, so that the grounding wire 21 is grounded.

[0092] Next, the leakage current detection device is installed at the opening of the electrical cabinet to be tested using the detection frame 31 (or the rear shell of the electrical cabinet can be opened and removed first, and then the detection frame 31 of this device can be fitted onto the back of the electrical cabinet so that the compression plate 313 can fit against the side wall of the electrical cabinet, and the support base 311 can act as the rear shell of the electrical cabinet), allowing the detection unit 322 to extend into the cabinet. Then, the pull rod 332 is pulled outward, causing the locking elastic element 335 to be compressed, thereby causing the first locking plate 333 and the second locking plate 334 to separate and no longer engage. Then, the limit plate 331 is moved to drive the leakage current detection plate 321 to move. After the leakage current detection plate 321 moves, the multiple detection heads 3223 move toward the outer shell of the equipment inside the electrical cabinet, thereby making the detection heads 3223 contact the outer shell of the equipment. Once the leakage current detection board 321 is moved to the appropriate position, the pull rod 332 can be released. Under the action of the locking elastic element 335, the first locking plate 333 and the second locking plate 334 re-engage to form a limit. When leakage occurs in the equipment, the detection head 3223 can smoothly transmit the electrical signal to the leakage current detection board 321, which is then displayed on the display 6, etc. If detection is not required, the leakage current detection device can be removed from the electrical cabinet.

[0093] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A leakage current detection device, characterized in that, The leakage current detection device includes an insulating box (1), a grounding component (2) and a detection component (3). The grounding component (2) is located inside the insulating box (1), and one end extends out of the bottom of the insulating box (1) and is grounded. The detection assembly (3) includes a detection frame (31) and a detection component (32). One side of the detection frame (31) is connected to the insulation box (1), and the other side of the detection frame (31) is used to cover the opening of the electrical cabinet (100) to be tested and is connected to the electrical cabinet (100). The detection component (32) is movably connected to the detection frame (31), the detection component (32) is movable relative to the detection frame (31), the detection component (32) is electrically connected to the grounding component (2), and the detection component (32) is configured to perform leakage current detection on the equipment (101) inside the electrical cabinet (100) through the opening of the electrical cabinet (100).

2. The leakage current detection device according to claim 1, characterized in that, The detection component (32) includes a leakage current detection board (321) and a detection unit (322). The leakage current detection board (321) is located inside the detection frame (31) and is slidably connected to the detection frame (31). The detection unit (322) includes an insulating cylinder (3221), a conductive post (3222), and a detection head (3223). The insulating cylinder (3221) is located on the side of the leakage current detection board (321) away from the insulating box (1), and one end of the insulating cylinder (3221) is connected to the leakage current detection board (321). The conductive post (3222) is located inside the insulating cylinder (3221) and is mechanically connected to the insulating cylinder (3221). One end of the conductive post (3222) is electrically connected to the leakage current detection board (321). One end of the detection head (3223) is mechanically connected to the other end of the conductive post (3222), and the detection head (3223) is electrically connected to the conductive post (3222). The other end of the detection head (3223) is located outside the insulating cylinder (3221) and is used to contact the equipment of the electrical cabinet to be tested.

3. The leakage current detection device according to claim 2, characterized in that, The testing frame (31) includes a support base (311) and two side plates (312). The two side plates (312) are arranged opposite to each other and are connected to the same side of the support base (311). The two side plates (312) and the support base (311) define a U-shaped cavity (310) for accommodating the electrical cabinet to be tested and communicating with the opening of the electrical cabinet. The support base (311) has a receiving cavity (3110) for accommodating the leakage current detection board (321).

4. The leakage current detection device according to claim 3, characterized in that, The testing frame (31) also includes two extrusion plates (313) and two adjusting rods (314). The two extrusion plates (313) are located inside the U-shaped cavity (310) and are respectively located on opposite sides of the opening of the U-shaped cavity (310). The two adjusting rods (314) are arranged in a one-to-one correspondence with the two extrusion plates (313) and the two side plates (312). The two ends of each adjusting rod (314) are connected to the corresponding extrusion plate (313) and the corresponding side plate (312) respectively, and the middle part of the adjusting rod (314) is threadedly connected to the corresponding side plate (312).

5. The leakage current detection device according to claim 2, characterized in that, The detection component (3) further includes a locking unit (33), which includes a limiting plate (331), a pull rod (332), a first locking plate (333), and a second locking plate (334). One side of the limiting plate (331) is located outside the detection frame (31), the middle part of the limiting plate (331) is slidably connected to the detection frame (31), and the other side of the limiting plate (331) is connected to the leakage detection plate (321). One end of the pull rod (332) is slidably connected to the limiting plate (331), and the other end is located outside the limiting plate (331). The moving direction of the pull rod (332) relative to the limiting plate (331) is perpendicular to the moving direction of the limiting plate (331) following the moving direction of the leakage detection plate (321). The first locking plate (333) is located inside the limiting plate (331) and is connected to the pull rod (332). The second locking plate (334) is connected to the detection frame (31). The second locking plate (334) is used to engage with the first locking plate (333) to prevent the limiting plate (331) from moving.

6. The leakage current detection device according to any one of claims 1-5, characterized in that, The grounding assembly (2) includes a grounding wire (21), a grounding outer box (22), and a hot air blower (23); The grounding outer box (22) is located in the insulating box (1). The grounding outer box (22) has a double-layer structure. There is a cavity (220) between the double-layer structure of the grounding outer box (22). The cavity (220) is connected to the interior of the grounding outer box (22) and the exterior of the insulating box (1). The middle part of the grounding wire (21) is located in the grounding outer box (22) and is rotatably connected to the grounding outer box (22). One end of the grounding wire (21) is located outside the grounding outer box (22) and the insulating box (1) and is grounded. The hot air blower (23) is located inside the insulation box (1) and is connected to the side wall of the insulation box (1). The air outlet of the hot air blower (23) is connected to the cavity (220).

7. The leakage current detection device according to claim 6, characterized in that, The grounding outer box (22) is rotatably connected to the insulating box (1), and the axial direction of the rotation axis of the grounding outer box (22) is the same as the height direction of the insulating box (1); The grounding assembly (2) also includes a drive motor (24), a drive gear (25), and a driven gear (26). The drive motor (24) is connected to the inner wall of the insulating box (1). The drive gear (25) is coaxially connected to the output shaft of the drive motor (24). The driven gear (26) is sleeved on the outer periphery of the grounding outer box (22) and connected to the grounding outer box (22). The driven gear (26) meshes with the drive gear (25).

8. The leakage current detection device according to claim 6, characterized in that, The leakage current detection device also includes a lifting assembly (4), which is located inside the insulation box (1). The lifting assembly (4) includes a telescopic rod (41) and a connecting ring (42). One end of the telescopic rod (41) is connected to the top of the insulation box (1), and the other end of the telescopic rod (41) is connected to one end of the connecting ring (42). The other end of the connecting ring (42) is rotatably connected to the top of the grounding outer box (22) and connected to the grounding wire (21). The axial direction of the connecting ring (42) and the extension direction of the telescopic rod (41) are the same as the height direction of the insulation box (1).

9. The leakage current detection device according to any one of claims 1-5 and 7-8, characterized in that, The leakage current detection device also includes a counterweight (5), which is located on top of the insulation box (1) and connected to the insulation box (1).

10. An electrical cabinet, characterized in that, The electrical cabinet includes a cabinet with an opening and a leakage current detection device as described in any one of claims 1-9, the leakage current detection device being connected to the opening.

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