Low-voltage distribution network fixed protection device for incoming line
Patent Information
- Application Number
- CN202522502875.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-26
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-26
AI Technical Summary
The existing low-voltage distribution network's incoming line clamp structure is inconvenient to adjust the tightness of, which can easily damage the insulators and affect the performance.
The clamping structure consists of a U-shaped hoop and a sickle-shaped clamp, combined with a spring-loaded sheet and a tightening screw. It achieves stable clamping through elastic deformation and bolt adjustment, thus avoiding damage to the insulator.
It achieves a stable clamping of the insulator, preventing damage, and at the same time, it is easy to adjust the clamping force to ensure electrical safety and stability.
Smart Images
Figure CN224935334U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of protective device technology, and more specifically, to a fixed protective device for the incoming line of a low-voltage power distribution network. Background Technology
[0002] The low-voltage distribution network's service entrance line is the last section of the line leading from the outdoor distribution network to the user's indoor distribution box. Its core function is to safely transmit electrical energy, and its standardized installation directly affects electrical safety and power supply stability. Outdoor sections must be equipped with insulating protective sleeves, and in windy and rainy areas, anti-breakage clamps and lightning protection grounding devices must be installed to prevent conductor wear, breakage, or damage from lightning strikes.
[0003] The incoming line anti-breakage clamp uses a clamp structure to fix and assemble with the insulator, and then uses the clamp structure to effectively clamp and limit the incoming line. The existing clamp has a double-plate clamping bolt locking design, which makes it inconvenient to adjust the tightness of the clamping surface. If the clamp is too tight, it can easily damage the insulator and affect the performance. Therefore, we propose a fixing and protection device for low-voltage distribution network incoming lines. 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 fixed protection device for the service entrance line of a low-voltage distribution network, so as to solve the technical problems of inconvenient adjustment of the tightness of the current line clamp and the easy damage to the insulator.
[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a low-voltage distribution network incoming line fixing and protection device, including a clamp, a clamp assembly and a ferrule. The clamp is U-shaped and has a built-in spring pressure piece. The end of the clamp has a notch, and a U-shaped clamp with a concave-convex tortuous surface is fixed in the notch. A sliding sleeve is slidably sleeved on the end of the clamp. The clamp assembly includes a base connecting two sliding sleeves, a cover and a clamp installed on the front side of the base for clamping the incoming line, and a connecting cylinder fixed on the rear side of the base. The ferrule is composed of two sickle-shaped arc-shaped parts, and the clamp is inserted between the arc-shaped parts. The arc-shaped parts of the ferrule have a fixing port, and the fixing port is fixedly connected to the connecting cylinder by a fixing screw.
[0006] Preferably, the sleeve has adjustment ports on both sides, and the spring pressure plate has limiting ends at both ends, with the limiting ends inserted into and limited within the corresponding adjustment ports.
[0007] Preferably, a retaining post is fixed inside the sliding sleeve, and the retaining post engages with the inner concave and convex surfaces of the U-shaped clamp. A side hole is provided on the outer side of the sliding sleeve, and a tightening screw is threaded through the side hole.
[0008] Preferably, the base has an arc-shaped fitting surface on the rear side, and the sleeve connection part is engaged and limited with the arc-shaped fitting surface. The base has a positioning port on the front side, and a clamping piece is inserted and limited in the positioning port. A pressure cover is fixed to the front side of the base by bolt threads, and the pressure cover is in contact with the clamping piece.
[0009] Preferably, the mating surfaces of the cover and the clip are provided with arc-shaped openings, and the corresponding openings form a circular clamping groove for clamping the inlet cable.
[0010] Preferably, the pressure cover is provided with a spring-loaded hole, and the spring-loaded hole is provided with a spring for the elastic buffer pressure cover and the bolt nut.
[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. The clamp and the ferrule of this utility model form a clamping structure. The U-shaped clamp is first fitted onto the outside of the insulator. Then, the opening of the sickle-shaped ferrule clamps the insulator from the side. Then, the sliding sleeve is connected to the end of the clamp and is slidably inserted and pressed to achieve clamping. During the clamping process, the spring pressure plate is squeezed. The elastic deformation of the spring pressure plate changes the bending arc. The clamp and the ferrule form a clamping structure fitted onto the outside of the insulator. The built-in spring pressure plate presses the insulator to maintain the clamping force. At the same time, the deformation of the spring pressure plate buffers and reduces surface clamping damage, maintaining the clamping effect while avoiding damage to the insulator.
[0012] 2. The U-shaped clamps at both ends of the sleeve of this utility model are connected to the locking post. The concave and convex surfaces of the U-shaped clamps cooperate with the locking post. Adjust the distance between the sleeve and the locking post, rotate the tightening screw to press the outer side of the sleeve end, reduce the distance between the cavity between the notch and the U-shaped clamp, increase the clamping force, and ensure stability. Then, the inlet line is clamped and positioned by the clamping opening between the pressure cover and the clamping plate. The spring hole has a built-in spring, which can achieve elastic pressing of the pressure cover with the bolt. While maintaining the clamping force, it is easy to adjust the clamping position of the inlet line to ensure practicality. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic diagram of the clamp assembly of this utility model; Figure 3 This is a schematic diagram of the unfolded structure of this utility model; Figure 4 This is a schematic diagram of the hoop structure of this utility model; Figure 5 This is a schematic diagram of the spring pressure plate structure of this utility model; Figure 6 This is a schematic diagram of the sliding sleeve structure of this utility model; Figure 7 This is a schematic diagram of the card sleeve structure of this utility model.
[0014] The following are the labels in the diagram: 1. Hoop; 101. Notch; 102. Spring-loaded plate; 103. Adjustment port; 104. U-shaped clamp; 105. Limiting end; 2. Sliding sleeve; 201. Tightening screw; 202. Locking post; 203. Side hole; 3. Fixture assembly; 301. Base; 302. Cover; 303. Spring-loaded hole; 304. Bolt; 305. Positioning port; 306. Clamping piece; 307. Clamping opening; 308. Connecting cylinder; 4. Sleeve; 401. Fixing screw; 402. Fixing port. Detailed Implementation
[0015] like Figures 1 to 4 As shown, this utility model relates to a low-voltage distribution network incoming line fixing and protection device, including a clamp 1, a clamp assembly 3, and a retaining sleeve 4. The clamp 1 has a U-shaped design and a built-in spring pressure plate 102. The end of the clamp 1 has a notch 101, and a U-shaped clamp 104 with a concave-convex tortuous surface is fixed in the notch 101. A sliding sleeve 2 is slidably sleeved on the end of the clamp 1. The clamp assembly 3 includes a base 301 connecting the two sliding sleeves 2, a cover 302 and a clamping piece 306 installed on the front side of the base 301 for clamping the incoming line, and a connecting cylinder 308 fixed on the rear side of the base 301. Adjustment ports 103 are opened on both sides of the clamp 1. The spring pressure plate 102 has a limiting end 105 at both ends, and the limiting end 105 is inserted into and limited in the corresponding adjustment port 103. The sliding sleeve 2 is fixed in the recess. A locking post 202 is fixed, and the locking post 202 is connected to the inner concave and convex surface of the U-shaped clamp 104. The outer side of the sliding sleeve 2 is provided with a side hole 203, and a tightening screw 201 is threaded through the side hole 203. The clamp 1 and the clamp 4 form a clamping structure. The U-shaped clamp 1 is first fitted onto the outside of the insulator, and then the opening of the sickle-shaped clamp 4 is clamped onto the insulator from the side. Then the sliding sleeve 2 is connected to the end of the clamp 1, and is slid in and pressed to achieve clamping. During the clamping process, the spring pressure plate 102 is squeezed, and the elastic deformation of the spring pressure plate 102 changes the bending arc. The clamping band formed by the clamp 1 and the clamp 4 is fitted onto the outside of the insulator. The built-in spring pressure plate 102 presses the insulator to maintain the clamping force. At the same time, the deformation buffer of the spring pressure plate 102 reduces surface clamping damage, maintains the clamping effect and avoids damage to the insulator.
[0016] like Figures 3 to 7As shown, this utility model relates to a low-voltage distribution network incoming line fixing and protection device, including a clamp 1, a clamp assembly 3, and a retaining sleeve 4. The retaining sleeve 4 is composed of two sickle-shaped arc-shaped parts, and the clamp 1 is inserted between the arc-shaped parts. The arc-shaped parts of the retaining sleeve 4 have a fixing port 402 at the connection point, and the fixing port 402 is fixedly connected to the connecting cylinder 308 by a fixing screw 401. The rear side of the base 301 has an arc-shaped fitting surface, and the connecting part of the retaining sleeve 4 is engaged and limited with the arc-shaped fitting surface. The front side of the base 301 has a positioning port 305, and a clamping piece 306 is inserted and limited in the positioning port 305. The front side of the base 301 is threadedly fixed with a pressure cover 302 by a bolt 304, and the pressure cover 302 is in contact with the clamping piece 306. The contact surfaces of the pressure cover 302 and the clamping piece 306 are both provided with arc-shaped clamping openings 307, and the corresponding clamping openings are... The circular clamping groove for holding the inlet cable is formed by 307. The pressure cover 302 is provided with a spring-loaded hole 303, and the spring-loaded hole 303 is provided with a spring that can elastically buffer the pressure cover 302 and the nut of the bolt 304. The U-shaped clamps 104 at both ends of the sleeve 1 are connected to the locking post 202. The concave and convex surfaces of the U-shaped clamps 104 cooperate with the locking post 202. Adjusting the distance between the sleeve 1 and the locking sleeve 4, rotating the tightening screw 201 to press the outer side of the end of the sleeve 1, reduces the cavity distance between the notch 101 and the U-shaped clamp 104, increases the clamping force, and ensures stability. Then, the inlet cable is clamped and positioned by the clamping opening 307 between the pressure cover 302 and the clamping piece 306. The spring-loaded hole 303 has a spring inside, which, together with the bolt 304, can realize the elastic pressing of the pressure cover 302, maintain the clamping force, and facilitate the adjustment of the clamping position of the inlet cable to ensure practicality.
[0017] Working Principle: This embodiment provides a fixed protection device for the incoming line of a low-voltage distribution network. In use, the clamp 1 and the clamp 4 form a clamp structure. The U-shaped clamp 1 is first fitted onto the outside of the insulator. Then, the opening of the sickle-shaped clamp 4 is clamped onto the insulator from the side. At this time, the sliding sleeve 2 aligns with the end of the clamp 1. The sliding sleeve 2 enters the end of the clamp 1, and during the process, it compresses the spring pressure plate 102. The spring pressure plate 102 elastically deforms and changes the bending arc. The clamp formed by the clamp 1 and the clamp 4 is fitted onto the outside of the insulator, and the built-in spring pressure plate 102 presses the insulator. The clamping force is maintained. The U-shaped clamps 104 at both ends of the sleeve 1 are connected to the locking post 202. The concave and convex surfaces of the U-shaped clamps 104 cooperate with the locking post 202. Adjust the distance between the sleeve 1 and the locking sleeve 4, rotate the tightening screw 201 to press the outer side of the end of the sleeve 1, so that the cavity distance between the notch 101 and the U-shaped clamp 104 is reduced, and the pressing state is maintained. Then, the inlet line is clamped and positioned by the clamping opening 307 between the pressure cover 302 and the clamping piece 306. The spring-loaded hole 303 has a built-in spring, which can achieve the elastic pressing of the pressure cover 302 with the bolt 304.
[0018] 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 fixing and protection device for a low-voltage distribution network incoming line, comprising a clamp (1), a clamp assembly (3), and a retaining sleeve (4), characterized in that: The clamp (1) is U-shaped and has a built-in spring pressure plate (102). The end of the clamp (1) is provided with a notch (101) and a U-shaped clamp (104) with a concave-convex tortuous surface is fixed in the notch (101). The end of the clamp (1) is slidably sleeved with a sliding sleeve (2). The clamp assembly (3) includes a base (301) connecting the two sliding sleeves (2), a cover (302) and a clamping piece (306) installed on the front side of the base (301) for clamping the inlet line, and a connecting cylinder (308) fixed on the rear side of the base (301). The sleeve (4) is composed of two sickle-shaped arc-shaped parts, and the hoop (1) is inserted between the arc-shaped parts. The arc-shaped parts of the sleeve (4) are provided with a fixing port (402), and the fixing port (402) is fixedly connected to the connecting cylinder (308) by a fixing screw (401).
2. The low-voltage distribution network service entrance line fixed protection device according to claim 1, characterized in that: The sleeve (1) has adjustment ports (103) on both sides, and the spring pressure plate (102) has limiting ends (105) at both ends, and the limiting ends (105) are inserted into the corresponding adjustment ports (103).
3. A fixed protection device for a low-voltage distribution network incoming line according to claim 2, characterized in that: The sliding sleeve (2) has a locking pin (202) fixed inside, and the locking pin (202) is connected to the inner concave and convex surface of the U-shaped clamp (104). The sliding sleeve (2) has a side hole (203) on the outside, and a tightening screw (201) is threaded through the side hole (203).
4. A fixed protection device for a low-voltage distribution network incoming line according to claim 3, characterized in that: The base (301) has an arc-shaped fitting surface on the rear side, and the connecting part of the sleeve (4) is engaged and limited with the arc-shaped fitting surface. The base (301) has a positioning port (305) on the front side, and a clamping piece (306) is inserted and limited in the positioning port (305). The base (301) has a pressure cover (302) threadedly fixed on the front side by bolts (304), and the pressure cover (302) is in contact with the clamping piece (306).
5. A fixed protection device for a low-voltage distribution network incoming line according to claim 4, characterized in that: The pressure cover (302) and the clamping piece (306) are both provided with arc-shaped clamping openings (307), and the corresponding clamping openings (307) form a circular clamping groove for clamping the inlet line.
6. A fixed protection device for a low-voltage distribution network incoming line according to claim 5, characterized in that: The pressure cover (302) is provided with a spring-loaded hole (303), and the spring-loaded hole (303) is provided with a spring for the elastic buffer pressure cover (302) and the nut of the bolt (304).