A medium voltage distribution network outdoor cable branch protection device

Abstract

The utility model discloses a kind of outdoor cable branch protection equipment of medium voltage distribution network, it is related to cable protection device technical field, to solve the technical problem that cabinet inside cable is easily damaged by traction, poor limiting effect, including base, built-in frame and wire compression component, the base is installed in cabinet bottom, equidistantly opening has wiring port on the base, and sliding installation has flip in wiring port, the flip is respectively opened with the tooth pressure port and the occlusal port on the clamping surface of wiring port, and tooth pressure port and occlusal port form cable clamping port, the built-in frame is installed in cabinet, and built-in frame bottom is equipped with bottom foot, the wire compression component includes lifting rod slidingly installed in movable slot, positioning track fixed on the upside of bottom foot, pressing strip slidingly installed between two side positioning tracks, and synchronous arm connecting lifting rod and pressing strip, the inside of movable slot is equipped with the clamping piece of gradually narrow mouth type. The utility model has the advantages of positioning cable anti-traction, good protection effect.

Description

Technical Field

[0001] This utility model relates to the field of cable protection device technology, and more specifically, to a protection device for outdoor cable branches in medium-voltage power distribution networks. Background Technology

[0002] Outdoor cable branch protection cabinets are outdoor electrical devices used for cable line tapping, branching, splicing, and circuit switching, playing a vital role in power distribution networks. The main incoming disconnect switch isolates the power supply, while the main incoming circuit breaker provides overload and short-circuit protection for the entire branch protection cabinet. Branch circuit breakers protect and control each outgoing line individually. When an overload, short circuit, or leakage fault occurs in the line, the corresponding circuit breaker will automatically trip, disconnecting the faulty circuit and protecting equipment and personnel safety.

[0003] Existing outdoor cable branch protection cabinets contain electrical components such as isolation power supplies, main incoming circuit breakers, and branch circuit breakers, which effectively protect the circuit operation. After the existing cable protection cabinets are installed, cable wiring is performed. After wiring, the cables need to be laid out in an overall manner for easy maintenance. However, the existing cable routing structure is inconvenient for positioning the cables during use and is prone to damage to the connection ends due to traction. In view of this, we propose an outdoor cable branch protection device for medium-voltage power distribution networks. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a medium-voltage power distribution network outdoor cable branch protection device to solve the technical problems of cables inside the cabinet being easily damaged by traction and poor limiting effect.

[0005] To solve the above technical problems, this utility model provides the following technical solution: a medium-voltage power distribution network outdoor cable branch protection device, including a base, an internal frame, and a wire clamping assembly. The base is installed at the bottom of a cabinet, and cable routing openings are equidistantly provided on the base. A flip cover is slidably installed inside the cable routing opening. The flip cover and the clamping surface of the cable routing opening are respectively provided with a toothed clamping opening and a biting opening, and the toothed clamping opening and the biting opening form a cable clamping opening. The internal frame is installed inside the cabinet, and a foot is provided at the bottom of the internal frame. The foot is installed on the base. Assembly rack plates are equidistantly distributed on the inner side of the internal frame, and a movable groove is provided at the bottom of the assembly rack plates. The wire clamping assembly includes a lifting rod slidably installed in the movable groove, a positioning rail fixed on the upper side of the foot, a pressure strip slidably installed between the two positioning rails, and a synchronous arm connecting the lifting rod and the pressure strip. A gradually narrowing clamping member is provided on the inner side of the movable groove.

[0006] Preferably, the flip cover has a handle at the upper end, and side sliding grooves are provided on both sides inside the cable routing opening. The flip cover is located inside the cable routing opening, and the flip cover sliding rod is slidably installed in the side sliding groove.

[0007] Preferably, the base is fixed with positioning feet at equal intervals, and the positioning feet are misaligned with the wiring port. The bottom feet are snapped onto the side of the base and misaligned with the wiring port.

[0008] Preferably, the clamping member consists of an open arc ring and inclined pressure strips fixed at the open end of the arc ring. The lifting rod slides within a gradually narrowing opening between the two inclined pressure strips, and the diameter of the arc ring is adapted to the lifting rod.

[0009] Preferably, both ends of the pressure strip are provided with positioning pieces, and the positioning pieces are adapted to the positioning track. The pressure strip corresponds to the cable clamping opening formed by the toothed pressure opening and the biting opening.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. The cabinet of this utility model is installed on the base via a base. The cable passes through the cable routing port into the cabinet. Electrical components are installed on the built-in frame. When wiring, the cable needs to be passed through the outside of the pressure strip and adjusted into the interlocking mouth. Then, the flip cover is slid closed, the flip cover closes the cable routing port, and the interlocking mouth and toothed pressure mouth clamp and position the cable. The cable is clamped and fixed in the middle after installation. The clamping part is equipped with a rubber pad to ensure clamping stability. The above structure realizes external anti-traction, avoids damage to the wiring end caused by external pulling of the cable during operation, and ensures safety in use.

[0011] 2. After the clamping and positioning of the cable in this utility model, the clamping strip of the clamping assembly is pulled outward. The two ends of the clamping strip slide between the positioning rails. At the same time, the lifting rod is driven by the synchronous arm to slide downward in the movable groove. During the sliding process, the lifting rod squeezes the inclined clamping strip of the clamping component. The two inclined clamping strips have a gradually narrow opening design. Together with the bottom arc ring, they maintain a tight clamping force. When the lifting rod moves into the arc ring, the positioning is completed. At this time, the clamping strip presses the cable inside the cabinet outward to keep it taut, restricting the axial and radial displacement of the cable. This reduces the mechanical stress caused by thermal expansion and contraction and wind swaying during operation, protects the cable insulation layer and conductor, and avoids the cable displacement from causing collisions or pulling on other electrical components inside the cabinet. This ensures the overall stability of the circuit inside the cabinet and reduces the risk of equipment failure. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic diagram of the cabinet structure of this utility model; Figure 3 This is a schematic diagram of the base structure of this utility model; Figure 4 This is a top view of the base of this utility model; Figure 5 This is a schematic diagram of the built-in frame structure of this utility model; Figure 6This is a schematic diagram of the movable groove structure of this utility model; Figure 7 This is a schematic diagram of the wire pressing assembly of this utility model; Figure 8 This is a schematic diagram of the clamping component of this utility model; Figure 9 This is a schematic diagram of the pressure strip structure of this utility model.

[0013] The following are the labels in the diagram: 1. Cabinet; 2. Base; 201. Cable routing port; 202. Side sliding groove; 203. Positioning foot; 204. Engaging joint; 3. Internal frame; 301. Assembly rack; 302. Base foot; 303. Movable groove; 4. Cable clamping assembly; 401. Lifting rod; 402. Synchronizing arm; 403. Pressure strip; 404. Positioning rail; 5. Flip cover; 501. Toothed pressure joint; 502. Handle; 6. Clamping component; 601. Angled pressure strip; 602. Arc ring. Detailed Implementation

[0014] like Figures 1 to 5 As shown, this utility model relates to a medium-voltage power distribution network outdoor cable branch protection device, including a base 2, an internal frame 3, and a wire clamping assembly 4. The base 2 is installed at the bottom of the cabinet 1. Cable routing openings 201 are equidistantly provided on the base 2, and a flip cover 5 is slidably installed inside the cable routing openings 201. Toothed pressure openings 501 and engagement openings 204 are respectively provided on the clamping surfaces of the flip cover 5 and the cable routing openings 201, forming a cable clamping opening. A handle 502 is provided at the upper end of the flip cover 5. Side sliding grooves 202 are provided on both sides inside the cable routing openings 201. The flip cover 5 is located inside the cable routing openings 201, and the sliding rod of the flip cover 5 is slidably installed in the side sliding grooves 202. Positioning feet 203 are fixed equidistantly on the base 2, and the positioning feet 203... The base 302 is offset from the cable routing port 201. The base 2 is clipped to the side of the base 2, offset from the cable routing port 201. The cabinet 1 is installed on the base through the base 2. The cable passes through the cable routing port 201 and enters the cabinet 1. The electrical components are installed on the built-in frame 3. When wiring, the cable needs to pass through the outside of the pressure strip 403. The cable is adjusted into the interlocking mouth 204. Then, the flip cover 5 is slid closed. The flip cover 5 closes the cable routing port 201. The interlocking mouth 204 and the toothed pressure mouth 501 clamp and position the cable. The cable is clamped and fixed in the middle after installation. The clamping part is equipped with a rubber pad to ensure clamping stability. The above structure realizes external anti-traction, avoids damage to the terminal of the cable caused by external pulling during operation, and ensures safety in use.

[0015] like Figures 4 to 9As shown, this utility model relates to a medium-voltage power distribution network outdoor cable branch protection device, including a base 2, an internal frame 3, and a wire pressing assembly 4. The internal frame 3 is installed inside the cabinet 1, and the bottom of the internal frame 3 is provided with a foot 302, which is installed on the base 2. The inner side of the internal frame 3 is equidistantly distributed with mounting plates 301, and the bottom of the mounting plates 301 is provided with a movable groove 303. The wire pressing assembly 4 includes a lifting rod 401 slidably installed in the movable groove 303, and a rod fixed to the upper side of the foot 302. The positioning track 404, the pressure strip 403 slidably installed between the two positioning tracks 404, and the synchronous arm 402 connecting the lifting rod 401 and the pressure strip 403 are provided. The inner side of the movable groove 303 is provided with a gradually narrowing clamping member 6. The clamping member 6 consists of an open arc ring 602 and an inclined pressure strip 601 fixed at the open part of the arc ring 602. The lifting rod 401 slides in the gradually narrowing opening between the two inclined pressure strips 601. The diameter of the arc ring 602 is adapted to the lifting rod 401. The two pressure strips 403 are... Each end is equipped with a positioning piece, and the positioning piece is adapted to the positioning rail 404. The pressure strip 403 corresponds to the cable clamping opening formed by the toothed pressure mouth 501 and the biting mouth 204. After the cable is clamped and positioned, the pressure strip 403 of the cable clamping assembly 4 is pulled outward. The two ends of the pressure strip 403 slide between the positioning rails 404. At the same time, the lifting rod 401 is driven to slide downward in the movable groove 303 through the synchronous arm 402. During the sliding process, the lifting rod 401 squeezes the inclined pressure strip 601 of the clamping part 6. The two inclined pressure strips 601 have a gradually narrowed opening. The design, in conjunction with the bottom arc ring 602, maintains a tight clamping force. When the lifting rod 401 moves into the arc ring 602, it completes its positioning. At this time, the pressure strip 403 presses the cables inside the cabinet 1 outward to keep them taut, restricting the axial and radial displacement of the cables. This reduces the mechanical stress caused by thermal expansion and contraction and wind swaying during operation, protecting the cable insulation layer and conductor. At the same time, it prevents cable displacement from causing collisions or pulling on other electrical components inside the cabinet, ensuring the overall stability of the circuit inside the cabinet and reducing the risk of equipment failure.

[0016] Working Principle: This embodiment provides a medium-voltage power distribution network outdoor cable branch protection device. The cabinet 1 is mounted on the base via the base 2. The cable passes through the cable routing port 201 into the cabinet 1. Electrical components are installed on the built-in frame 3. When wiring, the cable needs to pass through the outside of the pressure strip 403 and be adjusted into the interlocking mouth 204. Then, the flip cover 5 is slid closed, closing the cable routing port 201. The interlocking mouth 204 and the toothed pressure mouth 501 clamp and position the cable, clamping and fixing the cable in the middle after installation. The clamping part is equipped with a rubber pad to ensure clamping. To maintain stability, after the clamping wire is positioned, the clamping strip 403 of the clamping assembly 4 is pulled outward. The two ends of the clamping strip 403 slide between the positioning rails 404. At the same time, the lifting rod 401 is driven to slide downward in the movable groove 303 through the synchronous arm 402. During the sliding process, the lifting rod 401 squeezes the inclined clamping strip 601 of the clamping component 6. The two inclined clamping strips 601 have a gradually narrow opening design, which, together with the bottom arc ring 602, maintains a tight clamping force. When the lifting rod 401 moves into the arc ring 602, the positioning is completed. At this time, the clamping strip 403 presses the cable inside the cabinet 1 outward.

[0017] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A medium-voltage power distribution network outdoor cable branch protection device, comprising a base (2), an internal frame (3), and a wire clamping assembly (4), characterized in that: The base (2) is installed at the bottom of the cabinet (1). The base (2) has cable routing openings (201) at equal intervals. A flip cover (5) is slidably installed inside the cable routing opening (201). The flip cover (5) and the clamping surface of the cable routing opening (201) are respectively provided with a toothed opening (501) and a biting opening (204). The toothed opening (501) and the biting opening (204) form a cable clamping opening. The built-in frame (3) is installed inside the cabinet (1), and the bottom of the built-in frame (3) is provided with a foot (302). The foot (302) is installed on the base (2). The inner side of the built-in frame (3) is equidistantly distributed with assembly rack plates (301), and the bottom of the assembly rack plates (301) is provided with a movable groove (303). The pressure wire assembly (4) includes a lifting rod (401) slidably installed in the movable groove (303), a positioning rail (404) fixed on the upper side of the foot (302), a pressure strip (403) slidably installed between the two positioning rails (404), and a synchronous arm (402) connecting the lifting rod (401) and the pressure strip (403). The inner side of the movable groove (303) is provided with a gradually narrowing clamping member (6).

2. The outdoor cable branch protection device for medium-voltage distribution networks according to claim 1, characterized in that: The flip cover (5) is provided with a handle (502) at the upper end. The cable routing port (201) has side sliding grooves (202) on both sides. The flip cover (5) is located in the cable routing port (201), and the sliding rod of the flip cover (5) is slidably installed in the side sliding grooves (202).

3. The outdoor cable branch protection device for medium-voltage distribution networks according to claim 2, characterized in that: The base (2) is fixed with positioning feet (203) at equal intervals, and the positioning feet (203) are misaligned with the wiring port (201). The bottom foot (302) is snapped into the side of the base (2) and misaligned with the wiring port (201).

4. The outdoor cable branch protection device for medium-voltage distribution networks according to claim 3, characterized in that: The clamping member (6) consists of an open arc ring (602) and an inclined pressure strip (601) fixed at the open of the arc ring (602). The lifting rod (401) slides in the gradually narrowing opening between the two inclined pressure strips (601). The diameter of the arc ring (602) is adapted to the lifting rod (401).

5. The outdoor cable branch protection device for medium-voltage distribution networks according to claim 4, characterized in that: The pressure strip (403) is provided with positioning pieces at both ends, and the positioning pieces are adapted to the positioning track (404). The pressure strip (403) corresponds to the cable clamping opening formed by the toothed pressure opening (501) and the biting opening (204).

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