Electric leakage protection device for electric power supervision site
By introducing a multi-hole groove structure and threaded connection into the leakage current protection device, the wire end and the sheath are double-fixed, which solves the problem of easy slippage of the existing device and improves the fixing effect and stability at the power supervision site.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- INNER MONGOLIA KANGYUAN ENG CONSTR SUPERVISION C
- Filing Date
- 2025-06-19
- Publication Date
- 2026-05-26
Smart Images
Figure CN224288196U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of leakage current protection devices, specifically a leakage current protection device for use in power supervision sites. Background Technology
[0002] At power supervision and construction sites, residual current devices (RCDs) serve as the core line of defense for electrical safety, and their performance directly affects personnel safety and the stable operation of equipment. According to the "Technical Specifications for Temporary Electrical Safety at Construction Sites," the parameters of RCDs must be precisely matched to the power and voltage level of the electrical equipment. For example, in general work areas, devices with a residual current operating current of less than 30mA and an operating time of ≤0.1 seconds should be selected; in humid environments, high-sensitivity products with an operating current of less than 15mA are required.
[0003] Most current mainstream residual current devices (RCDs) use a single-end bolt-clamping plate structure to fix the wire. This method achieves connection by having the bolt drive the clamping plate to squeeze the stripped part of the wire. However, it has certain drawbacks: First, the surface of the metal wire is smooth and has low friction, making it easy to slip out of the clamping plate's squeezing gap under frequent external pulling (such as equipment movement or cable handling). Second, existing devices only fix the conductor part of the wire, lacking effective clamping of the insulation layer, failing to form a double fixing structure, and making it difficult to distribute stress, resulting in a significant reduction in fixing effectiveness. Therefore, its practicality is not very good, and there is room for improvement. Utility Model Content
[0004] (a) Technical problems to be solved
[0005] To address the shortcomings of existing technologies, this utility model provides a leakage current protection device for power supervision sites, which has the advantage of improved practicality.
[0006] (II) Technical Solution
[0007] To achieve the above objectives, this utility model provides the following technical solution: a leakage current protection device for power supervision sites, comprising a leakage current protection device body, the leakage current protection device body having multiple wire holes, a sliding groove on one side of each wire hole, a wire clamping device sliding within the sliding groove for clamping the wire end, a slot at both the upper and lower ends of the leakage current protection device body, a locking plate being installed in the slot, a fixing device being fixedly installed at the end of the locking plate, a through hole for wire passage at one end of the fixing device, a sliding groove II within the fixing device, a wire clamping device II sliding within the sliding groove II for clamping the wire sheath, a threaded hole on the side wall of the fixing device, the threaded hole intersecting with the sliding groove II, and the wire clamping device II being threadedly connected to the threaded hole.
[0008] Furthermore, the wire clamping device includes a clamping plate, a bolt is rotatably mounted in the middle of the clamping plate, and the side wall of the leakage protection device body is provided with a threaded hole, which is threadedly connected to the bolt.
[0009] Furthermore, the wire clamping device two includes a clamping plate two, and another bolt is rotatably mounted on the middle of the clamping plate two. The other bolt is threadedly connected to the threaded hole of the fixing device.
[0010] Furthermore, the center of the through hole and the center of the wire hole are aligned vertically.
[0011] Preferably, the sidewall of the wire hole is provided with a fixing clamping plate, and the fixing clamping plate and the clamping plate are arranged in a centrally symmetrical manner.
[0012] Preferably, the cross-section of the card plate is T-shaped.
[0013] (III) Beneficial Effects
[0014] Compared with the prior art, this utility model provides a leakage current protection device for power supervision sites, which has the following beneficial effects:
[0015] The leakage protection device used in this power supervision site uses a clamping plate that moves by rotating a bolt to clamp the wire sheath, fixing the wire in the through hole. The two bolts and the clamping plate clamp and fix the wire end together, thus improving the fixing effect and improving practicality. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the structure of the leakage current protection device body after rotating at a certain angle.
[0018] Figure 3 This is an enlarged structural schematic diagram of the clamping plate and bolts of this utility model;
[0019] Figure 4 This is an enlarged structural schematic diagram of the clamping plate 2 and the bolts of this utility model;
[0020] Figure 5 This is a cross-sectional schematic diagram of the fixing device at one end of the card plate of this utility model;
[0021] Figure 6 This utility model Figure 2 The diagram shows a partially enlarged structural schematic at point A.
[0022] In the diagram: 1. Leakage protection device body; 2. Wire hole; 3. Slot; 4. Card plate; 5. Fixing device; 6. Through hole; 7. Slide groove two; 8. Clamping plate one; 9. Bolt; 10. Clamping plate two; 11. Fixed clamping plate. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] In the prior art, a leakage current protection device for power supervision sites includes a leakage current protection device body 1. The leakage current protection device body 1 has multiple wire holes 2. The worker inserts the stripped wire end into the wire hole 2. A sliding groove is provided on one side of the wire hole 2. A wire clamping device is slidable in the sliding groove to clamp the wire end. The wire clamping device includes a clamping plate 8. A bolt 9 is rotatably installed in the middle of the clamping plate 8. The side wall of the leakage current protection device body 1 has a threaded hole, which is threadedly connected to the bolt 9. When the bolt 9 is rotated, the bolt 9 rotates in the threaded hole, causing the clamping plate 8 to slide in the sliding groove and move closer to the wire end until the clamping plate 8 firmly clamps the wire end and fixes it. A fixed clamping plate 11 is provided on the side wall of the wire hole 2. The fixed clamping plate 11 and the clamping plate 8 are centrally symmetrically arranged. The fixed clamping plate 11 cooperates with the clamping plate 8 to clamp the wire end to the outside.
[0025] Please see Figure 1-4 This utility model discloses a leakage current protection device for power supervision sites. The leakage current protection device body 1 has slots 3 at both its upper and lower ends, with a clamping plate 4 clamped within each slot 3. A fixing device 5 is fixedly installed at the end of the clamping plate 4. By clamping the clamping plate 4 into the slot 3, sufficient clamping force is generated, fixing the fixing device 5 to the leakage current protection device body 1. One end of the fixing device 5 has a through hole 6 for wire passage. The unstripped portion of the wire is placed in the through hole 6. The fixing device 5 has a second sliding groove 7, within which a second wire clamping device is slidably installed. This device clamps the wire at its insulation layer, generating sufficient compressive force. The wire insulation is made of rubber. The second wire clamping device clamps the rubber insulation layer, working in conjunction with the first wire clamping device to fix the wire, thus improving stability to a certain extent. The side wall of the fixing device 5 has a threaded hole intersecting with the second sliding groove 7, and the second wire clamping device is threadedly connected to the threaded hole.
[0026] The second wire clamping device includes a second clamping plate 10. The second clamping plate 10 has a smooth circular hole in the middle, and the diameter of the circular hole is equal to the diameter of the bolt 9. The bolt 9 is rotatably set in the circular hole, or the bolt 9 is rotatably set with the second clamping plate 10 through a rotating shaft or other device. Another bolt 9 is threadedly connected to the threaded hole of the fixing device 5. When the bolt 9 is rotated, the bolt 9 rotates in the threaded hole, causing the second clamping plate 10 to slide in the second groove 7 until the second clamping plate 10 is firmly pressed against the insulation of the wire, generating sufficient compressive force to fix the wire.
[0027] The center of the through hole 6 and the center of the wire hole 2 are aligned vertically, so that the wire end can pass through the through hole 6 and enter the wire hole 2.
[0028] The cross-section of the card plate 4 is T-shaped, meaning that the card plate 4 can slide back and forth along the opening direction of the card slot 3, but will not slide up and down.
[0029] In summary, when using this leakage current protection device for power supervision, the wire end is stripped to expose the metal conductor. The stripped wire end is then inserted into the conductor hole 2 of the leakage current protection device body 1. The bolt 9 in the middle of the clamping plate 1 is rotated. Since the bolt 9 is threadedly connected to the threaded hole on the side wall of the leakage current protection device body 1, the clamping plate 1 will slide towards the wire end as the bolt 9 rotates until it firmly clamps the wire end. The fixed clamping plate 11, which is symmetrically arranged with the clamping plate 18, will cooperate to clamp and further stabilize the wire end. At this time, the unstripped part of the wire is in the through hole 6. The bolt 9 in the middle of the clamping plate 2 is rotated. This bolt 9 is threadedly connected to the threaded hole on the side wall of the fixed device 5. Rotating the bolt 9 can drive the clamping plate 2 10 to slide in the sliding groove 2 7 until the clamping plate 2 10 is tightly pressed against the wire insulation. The rubber material properties of the wire insulation generate sufficient compressive force to fix the wire. In conjunction with the conductor clamping device 1, the wire is fixed.
[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A leakage current protection device for use in power supervision sites, comprising a leakage current protection device body (1), the leakage current protection device body (1) having a plurality of wire holes (2), a sliding groove being provided on one side of each wire hole (2), and a wire clamping device being slidably disposed within the sliding groove for clamping the end of the wire, characterized in that: The upper and lower ends of the leakage protection device body (1) are provided with slots (3), and a card plate (4) is installed in the slot (3). A fixing device (5) is fixedly installed at the end of the card plate (4). One end of the fixing device (5) is provided with a through hole (6) for the passage of wires. The fixing device (5) is provided with a sliding groove (7). A wire clamping device (2) is slidably installed in the sliding groove (7) for clamping the sheath of the wire. The side wall of the fixing device (5) is provided with a threaded hole, and the threaded hole intersects with the sliding groove (7). The wire clamping device (2) and the threaded hole are threadedly connected.
2. The leakage current protection device for power supervision sites according to claim 1, characterized in that: The wire clamping device includes a clamping plate (8), and a bolt (9) is rotatably installed in the middle of the clamping plate (8). The side wall of the leakage protection device body (1) is provided with a threaded hole and is threadedly connected to the bolt (9).
3. The leakage current protection device for power supervision sites according to claim 2, characterized in that: The second wire clamping device includes a second clamping plate (10), and another bolt (9) is rotatably mounted on the middle of the second clamping plate (10). The other bolt (9) is threadedly connected to the threaded hole of the fixing device (5).
4. The leakage current protection device for power supervision sites according to claim 1, characterized in that: The center of the through hole (6) and the center of the wire hole (2) are aligned vertically.
5. The leakage current protection device for power supervision sites according to claim 2, characterized in that: The side wall of the wire hole (2) is provided with a fixing clamping plate (11), and the fixing clamping plate (11) and the clamping plate (8) are arranged in a centrally symmetrical manner.
6. The leakage current protection device for power supervision sites according to any one of claims 1-5, characterized in that: The cross-section of the card plate (4) is T-shaped.