A high-voltage drop-out fuse pull ring

Abstract

This utility model discloses a high-voltage drop-out fuse pull ring, relating to the field of fuse technology. It includes a cap, a connector, a fixing plate, a pull ring, and auxiliary components. The cap and connector are installed together. The pull ring is laterally connected to the connector via a connecting rod. An auxiliary component is fitted around the pull ring, providing light shielding and positioning for the pull ring. The auxiliary component consists of a side plate and a middle plate. In this utility model, the side plate and middle plate provide light shielding around the pull ring, facilitating quick location of the pull ring's lateral holes even under light illumination. The positioning hole allows the operating rod to smoothly enter the positioning hole when it contacts the side plate during operation, accurately positioning the pull ring and improving the overall stability of the device. The notch maintains light shielding while improving visual accuracy of the pull ring.

Description

Technical Field

[0001] This utility model relates to the field of fuse technology, specifically a high-voltage drop-out fuse pull ring. Background Technology

[0002] The pull ring of a high-voltage drop-out fuse is a crucial operating component. It is typically a ring or semi-ring-shaped part connected to the fuse's contact system. Operating the pull ring enables the fuse to open or close. It is generally made of high-strength metal materials, such as cast steel or alloy steel, to ensure it can withstand significant mechanical stress and electrodynamic forces during operation, while also possessing good wear and corrosion resistance. By pulling the pull ring, the operator can separate or bring the moving contact of the fuse into contact with the stationary contact, thus achieving the opening and closing operation. During opening, pulling the pull ring tilts the fuse tube, separating the contacts and cutting off the circuit; during closing, pushing the pull ring upwards returns the fuse tube to a vertical position, re-engaging the contacts and reconnecting the circuit. Indication function: The position and status of the pull ring visually reflect the fuse's operating status. When the pull ring is at the bottom, it indicates that the fuse is in the open state; when the pull ring is pushed up, it indicates that the fuse is in the closed state, which allows operators to quickly judge the operating status of the fuse.

[0003] Currently, in use, the pull ring of a high-voltage drop-out fuse is a fixed closed ring structure. During power outage and restoration operations, operators need to use an insulated operating rod to precisely insert the horizontal working head on the insulated operating rod into the fixed closed ring to successfully operate. However, in actual operation, the inlet of the pull ring is easily affected by light and the standing angle, making it difficult to accurately insert the horizontal working head into the fixed closed ring. Multiple alignments are required to operate, resulting in low work efficiency and cumbersome operation.

[0004] In view of the above, this application is hereby submitted. Utility Model Content

[0005] The purpose of this invention is to provide a high-voltage drop-out fuse pull ring to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides a high-voltage drop-out fuse pull ring, including a cap body, a connector, a fixing plate, a pull ring, and auxiliary components.

[0007] The cap body is installed and connected to the connector. The pull ring is laterally connected to the connector via a connecting rod. An auxiliary component is sleeved on the outside of the pull ring to provide light protection and positioning for the outside of the pull ring.

[0008] In one embodiment, the auxiliary component consists of a side plate and a middle plate. The side plates are provided in two sets, respectively located on both sides of the middle plate. The side plates are generally frustoconical in shape, and the pull ring is located inside the middle plate.

[0009] In one embodiment, both the middle plate and the side plate are hollow, leaving an internal space for the middle plate and the side plate, and providing an operating space around the pull ring.

[0010] In one embodiment, a positioning hole is provided at the lateral center of the side plate, the positioning hole being coaxially arranged with the center hole of the pull ring, and the diameter of the positioning hole being larger than the inner diameter of the pull ring.

[0011] In one embodiment, a notch is provided at the bottom front end of the side plate and the middle plate, and the notch is located below the pull ring.

[0012] In one embodiment, the side plate and the middle plate are connected by bolts.

[0013] In one embodiment, the inner and outer walls of the side plate and the middle plate are all coated with an anti-reflective coating.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. By setting the side plates and middle plates, the area around the pull ring is light-shielded, making it easy for workers to quickly locate the lateral hole of the pull ring even under light illumination. With the positioning hole, when the operating rod contacts the side of the side plate during operation, it can smoothly enter the positioning hole and complete the accurate positioning of the pull ring, improving the overall stability of the device. The notch design maintains light shielding while improving the visual accuracy of the pull ring. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of a high-voltage drop-out fuse pull ring;

[0017] Figure 2 A side view of the overall structure of a high-voltage drop-out fuse pull ring;

[0018] Figure 3 This is a detailed diagram showing the auxiliary component and position of the pull ring of a high-voltage drop-out fuse.

[0019] In the diagram: 1. Cap body; 2. Connector; 3. Fixing plate; 4. Pull ring; 41. Connecting rod; 5. Side plate; 51. Positioning hole; 52. Notch; 6. Middle plate. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1-3 This utility model provides a technical solution including a cap body 1, a connector 2, a fixing plate 3, a pull ring 4, and auxiliary components.

[0022] like Figures 1-2 As shown, the cap body 1 is installed and connected to the connector 2. The pull ring 4 is laterally connected to the connector 2 through the connecting rod 41. An auxiliary part is sleeved on the outside of the pull ring 4. The auxiliary part provides light shielding and positioning treatment for the outside of the pull ring 4, which makes it convenient for the staff to quickly insert the operating rod and the pull ring 4, thereby improving the operating efficiency and stability.

[0023] Preferably, in one embodiment, such as Figures 2-3 As shown, the auxiliary component consists of a side plate 5 and a middle plate 6. The side plate 5 is provided in two sets, which are located on both sides of the middle plate 6 respectively. The side plate 5 is a frustum-shaped structure. The pull ring 4 is located inside the middle plate 6. By setting the side plate 5 and the middle plate 6, the area around the pull ring 4 is shielded from light, making it convenient for people to quickly find the lateral hole of the pull ring 4 when under the illumination of a light source.

[0024] Preferably, in one embodiment, such as Figures 2-3 As shown, both the middle plate 6 and the side plate 5 are hollow, leaving room inside the middle plate 6 and the side plate 5, and leaving operating space around the pull ring 4 to facilitate manual operation.

[0025] Preferably, in one embodiment, such as Figures 2-3 As shown, a positioning hole 51 is located at the lateral center of the side plate 5. The positioning hole 51 is coaxial with the center hole of the pull ring 4. The diameter of the positioning hole 51 is larger than the inner diameter of the pull ring 4. With the positioning hole 51, when the operating rod contacts the side of the side plate 5 during operation, it can smoothly enter the interior of the positioning hole 51 and complete the accurate positioning of the pull ring 4, thereby improving the overall stability of the device.

[0026] Preferably, in one embodiment, such as Figures 2-3 As shown, the side plate 5 and the middle plate 6 have notches 52 at their front bottom. The notches 52 are located below the pull ring 4. By setting the notches 52, the visual accuracy of the pull ring 4 is improved while maintaining light blocking.

[0027] Preferably, in one embodiment, the side plate 5 and the middle plate 6 are connected by bolts.

[0028] Preferably, in one embodiment, the inner and outer walls of the side plate 5 and the middle plate 6 are coated with an anti-reflective coating. The anti-reflective coating is a matte black aluminum oxide coating (reflectivity ≤5%), with a coating thickness of 20±2μm. After coating, it is cured at 200℃ for 30 minutes to ensure that the coating adhesion is ≥5B (ASTM D3359 standard) and the coating surface roughness Ra≤0.8μm to avoid light diffuse reflection interference.

[0029] Working principle:

[0030] The side plate 5 and the middle plate 6 are used to shield the pull ring 4 from light, making it easy for workers to quickly locate the lateral hole of the pull ring 4 under illumination. The positioning hole 51 allows the operating rod to smoothly enter the positioning hole 51 when it contacts the side of the side plate 5 during operation, thus accurately positioning the pull ring 4 and improving the overall stability of the device. The notch 52 maintains light shielding while improving the visual accuracy of the pull ring 4.

[0031] 1. Comparison of operational efficiency experiments:

[0032] Under the same lighting conditions (1000 Lux), 10 operators conducted 100 insertion and removal tests using both a conventional pull ring and the pull ring of this invention.

[0033] (1) Traditional pull ring: average operation time 15.2 seconds / time, success rate 78%.

[0034] (2) This utility model: the average operation time is 10.5 seconds / time, the success rate is 95%, the efficiency is improved by 31%, and the data are confirmed to be significantly different by t test (p<0.05).

[0035] 2. Actual effect test of anti-reflective coating:

[0036] Reflectance test: The reflectance of the coating surface was measured using a spectrophotometer (model: CM-2600d). The results show:

[0037] (1) Uncoated metal surface: reflectivity 85% (mainly specular reflection).

[0038] (2) Matte aluminum oxide coating: reflectivity 4.5% (mainly diffuse reflection), light-blocking effect improved by 18 times.

Claims

1. A high-voltage drop-out fuse pull ring (4), comprising a cap body (1), a connector (2), a fixing plate (3), a pull ring (4), and auxiliary components, characterized in that: The cap body (1) is installed and connected to the connector (2). The pull ring (4) is laterally connected to the connector (2) through the connecting rod (41). An auxiliary component is sleeved on the outside of the pull ring (4). The auxiliary component provides light-blocking and positioning treatment for the outside of the pull ring (4).

2. The high-voltage drop-out fuse pull ring (4) as described in claim 1, characterized in that: The auxiliary component consists of a side plate (5) and a middle plate (6). The side plate (5) is provided in two sets, which are located on both sides of the middle plate (6). The side plate (5) is a frustum-shaped structure. The pull ring (4) is located inside the middle plate (6).

3. The high-voltage drop-out fuse pull ring (4) as described in claim 2, characterized in that: Both the middle plate (6) and the side plate (5) are hollow, so that there is room inside the middle plate (6) and the side plate (5), and there is room for operation around the pull ring (4).

4. The high-voltage drop-out fuse pull ring (4) as described in claim 3, characterized in that: The side plate (5) has a positioning hole (51) at its lateral center. The positioning hole (51) is coaxial with the center hole of the pull ring (4). The diameter of the positioning hole (51) is larger than the inner diameter of the pull ring (4).

5. The high-voltage drop-out fuse pull ring (4) as described in claim 2, characterized in that: The side plate (5) and the middle plate (6) have notches (52) at their front bottoms, and the notches (52) are located below the pull ring (4).

6. The high-voltage drop-out fuse pull ring (4) as described in claim 2, characterized in that: The side plate (5) and the middle plate (6) are connected by bolts.

7. The high-voltage drop-out fuse pull ring (4) as described in claim 2, characterized in that: The inner and outer walls of the side plate (5) and the middle plate (6) are coated with an anti-reflective coating.

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