Corrosion-resistant ice-melting insulator

Abstract

The utility model relates to the field of composite insulators, and discloses a corrosion-resistant ice-melting insulator, which comprises an insulation assembly and an end assembly, a sheath is fixed at the end of the insulation assembly, an insertion cavity is arranged in the sheath, the end assembly comprises a fitting, the end of the fitting is inserted into the insertion cavity, the end assembly further comprises a zinc ring, and the zinc ring is arranged in the insertion cavity. An annular fixing groove is formed in the circumferential side wall of the fitting, the zinc ring is located in the annular fixing groove and integrally formed with the fitting, one side of the zinc ring abuts against the circumferential side wall of the insertion cavity, the other side of the zinc ring is exposed outside, the zinc ring is more stably fixed to the fitting, and it is ensured that the zinc ring is not prone to falling off in the operation process. The zinc ring has good corrosion resistance, and when rainwater falls on the surface of the hardware fitting, the zinc ring is corroded before the hardware fitting, so that the whole hardware fitting is protected from being corroded, and the outer surface of the hardware fitting is protected.

Description

Technical Field

[0001] This application relates to the field of composite insulators, and in particular to a corrosion-resistant de-icing insulator. Background Technology

[0002] De-icing insulators are devices specifically designed to prevent and resolve icing problems on transmission lines. The insulator's skirts have a special material, such as a semiconductor coating, that accelerates ice melting. This structure not only helps prevent ice formation but also actively melts ice after it forms, thus avoiding overload and ice flashover tripping accidents.

[0003] De-icing insulators typically consist of a core rod, sheath, sheds, and fittings. The core rod is primarily made of epoxy glass fiber, while the sheath and sheds are made of high-temperature vulcanized silicone rubber. A coupling agent is evenly applied to the surface of the core rod to connect the silicone rubber sheath to the glass fiber core rod. The end of the core plate is inserted into the fitting, while the silicone rubber sheath is fitted onto the outer peripheral wall of the fitting.

[0004] In practical use, the outer peripheral wall of the fitting is exposed and subject to corrosion due to environmental factors. The corrosion of the fitting affects the structural strength of the fitting and the sheath. Consequently, external moisture can diffuse from the contact point between the sheath and the fitting into the core rod, causing corrosion and reducing the insulation performance of the insulator. Therefore, the principle of sacrificial anode is commonly used in the existing technology to protect the fitting. Zinc sheath is usually used as the cation of the anode. However, if the thickness of the zinc sheath is low, the zinc sheath will be completely corroded, and the fitting will continue to corrode. If the thickness of the zinc sheath is large, the stability between the zinc sheath and the fitting is poor. Therefore, there is a need for an ice-melting insulator that has both a long service life zinc sheath and a stable connection with the fitting. Utility Model Content

[0005] To prevent corrosion caused by contact between the fittings and the umbrella cover, a corrosion-resistant de-icing insulator is provided.

[0006] The above-mentioned objective of this application is achieved through the following technical solution:

[0007] A corrosion-resistant de-icing insulator includes an insulating component and an end component. The end of the insulating component is fixed with a sheath, and the sheath has a plug cavity. The end component includes a fitting, the end of which is inserted into the plug cavity. The end component also includes a zinc ring. An annular fixing groove is formed on the circumferential sidewall of the fitting. The zinc ring is located in the annular fixing groove and is integrally formed with the fitting. One side of the zinc ring abuts against the circumferential sidewall of the plug cavity, and the other side of the zinc ring is exposed.

[0008] By adopting the above technical solution, the zinc ring is located in the annular fixing groove and integrally formed with the fitting, making the zinc ring more firmly fixed on the fitting, enhancing its ability to resist external impact, and ensuring that the zinc ring will not easily fall off during operation; at the same time, the zinc ring has good corrosion resistance. When rainwater falls on the surface of the fitting, the zinc ring will be corroded before the fitting, thus protecting the fitting as a whole from corrosion. The zinc ring protects the outer surface of the fitting, preventing the fitting from rusting in different environments, ensuring that the insulator can operate stably for a long time in different environments. The zinc sleeve not only has a long service life to protect the fitting, but also has good stability when connected to the fitting.

[0009] Optionally, the outer peripheral sidewall of the zinc ring and the outer peripheral sidewall of the fitting are located on the same side.

[0010] By adopting the above technical solution, the sheath and zinc ring are tightly connected, reducing the gap between the sheath and zinc ring, preventing rainwater from entering the interior of the fitting through the gap, and improving the waterproof sealing effect between the sheath and zinc ring.

[0011] Optionally, a pressure ring is fixed to the end of the fitting, and an annular groove is formed between the pressure ring and the fitting. A protruding ring is fixed to the inner wall of the insertion cavity, and the protruding ring engages with the annular groove.

[0012] By adopting the above technical solution, on the one hand, the structure of the convex ring and the annular groove engaging can prevent relative movement between the fitting and the sheath, improve the bonding force between the fitting and the sheath, and enhance the tensile strength of the overall structure; on the other hand, in some humid environments, the structure of the convex ring and the engaging groove can form a good sealing effect, preventing moisture or contaminants from entering the fitting, and ensuring the long-term stable operation of the fitting.

[0013] Optionally, the outer circumferential diameter of the pressure ring is smaller than the outer circumferential diameter of the fitting.

[0014] By adopting the above technical solution, when repairing the insulator, the end assembly is pulled out upwards. The outer diameter of the pressure ring is smaller than the outer diameter of the fitting, and the area where the upper side of the pressure ring abuts against the convex ring is smaller than the area where the lower side of the fitting abuts against the convex ring. This facilitates the pressure ring squeezing the convex ring out of the insertion cavity and improves the efficiency of the disassembly process.

[0015] Optionally, the lower edge of the pressure ring facing the circumferential sidewall of the insertion cavity has a smooth transition.

[0016] By adopting the above technical solution, when the end of the fitting is inserted into the insertion cavity, the convex ring engages with the annular groove. When the pressure ring moves downward, the lower edge of the pressure ring facing the inner wall of the sheath will first abut against the convex ring and make it a smooth transition, so that the convex ring can slide into the annular groove and engage with the annular groove more conveniently.

[0017] Optionally, the insulating assembly further includes a core rod, with the end of the fitting sleeved on the outside of the core rod, and the lower edge of the pressure ring on the side facing away from the circumferential sidewall of the insertion cavity has a smooth transition.

[0018] By adopting the above technical solution, the end of the fitting is sleeved on the outside of the mandrel. When the fitting is sleeved on the mandrel, the edges and corners of the fitting are made to be smoothly transitioned to avoid collision between the fitting and the mandrel and damage.

[0019] Optionally, the bottom of the insertion cavity is fixed with an upwardly raised inner sealing ring, and the inner sealing ring abuts against the circumferential sidewall of the mandrel.

[0020] By adopting the above technical solution, the inner sealing ring wraps around the hardware, increasing the wrapping area between the sheath and the hardware, preventing moisture penetration, and thus improving the sealing performance between the hardware and the sheath.

[0021] Optionally, a buffer ring is fixed at the upper edge of the circumferential sidewall of the insertion cavity, and the buffer ring abuts against the circumferential sidewall of the zinc ring.

[0022] By adopting the above technical solution, the stress generated between the zinc ring and the sheath can be dispersed, while preventing moisture and other contaminants from entering the insertion cavity, thus enhancing the sealing performance between the zinc ring and the sheath.

[0023] In summary, this application has at least the following beneficial effects:

[0024] 1. By using sacrificial anode technology, the zinc ring reacts with rainwater before the fitting, thus preventing the outer peripheral wall of the fitting from being corroded by rainwater and improving the corrosion resistance of the fitting. Because the diameter and thickness of the zinc ring are too large, it often does not need to be replaced, ensuring the good performance of the fitting under long-term operation of the insulator. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a corrosion-resistant de-icing insulator;

[0026] Figure 2 A cross-sectional view of a corrosion-resistant de-icing insulator;

[0027] Figure 3 This is an exploded cross-sectional view of a corrosion-resistant de-icing insulator.

[0028] Reference numerals: 1. Insulating component; 11. Core rod; 12. Umbrella cover; 13. Umbrella skirt; 131. Large umbrella skirt; 132. Small umbrella skirt; 14. Sheath; 141. Insertion cavity; 142. Raised ring; 143. Inner sealing ring; 144. Buffer ring; 2. End component; 21. Fittings; 211. Slot; 212. Annular fixing groove; 213. Pressure ring; 214. Annular retaining groove; 22. Zinc ring; 23. Fixing element. Detailed Implementation

[0029] The following section provides a more detailed description, in conjunction with the accompanying diagrams:

[0030] Example 1:

[0031] As attached Figure 1 and attached Figure 2 As shown, a corrosion-resistant de-icing insulator includes an insulation component 1 and an end component 2.

[0032] The insulating component 1 includes a core rod 11, which is mainly made of epoxy glass fiber and is cylindrical in shape. A coupling agent is uniformly coated on the outer peripheral sidewall surface of the core rod 11.

[0033] The insulating component 1 includes a canopy 12 and a skirt 13. The insulating component 1 is made of a material that is resistant to dirt, tracking, and electrical corrosion, and in this case, it is high-temperature vulcanized silicone rubber.

[0034] The umbrella sleeve 12 is circular in shape and is bonded to the core rod 11 by a coupling agent. An umbrella skirt 13 is fixed on the outer peripheral side wall of the umbrella sleeve 12. The umbrella skirt 13 is flat in shape to prevent water accumulation on the surface. The umbrella skirt 13 includes a large umbrella skirt 131 and a small umbrella skirt 132. The large umbrella skirt 131 and the small umbrella skirt 132 are arranged in a staggered manner to prevent the large umbrella skirt 131 from being too close to the insulator and causing the insulator to be bridged by ice ridges, resulting in a drop in ice flashover voltage and improving the insulation safety performance of the insulator.

[0035] As attached Figure 2 and attached Figure 3 As shown, a protective sleeve 14 is fixed to the end of the umbrella cover 12. The protective sleeve 14 is a ring with the core rod 11 as the axis. A plug-in cavity 141 is opened inside the protective sleeve 14. A protruding ring 142 is fixed on the inner side wall of the protective sleeve 14 inside the plug-in cavity 141. The protruding ring 142 is made of elastic material, which is silicone rubber in this case.

[0036] The sheath 14 forms an upwardly raised inner sealing ring 143 inside the insertion cavity 141 through high-temperature vulcanization molding, and the inner sealing ring 143 abuts against the circumferential sidewall of the core rod 11.

[0037] There are two end components 2, which are located at both ends of the mandrel 11. The end components 2 include fittings 21 and zinc rings 22.

[0038] Fitting 21 is located at the end of the core rod 11. Fitting 21 has a slot 211 on the side facing the core rod 11, and the end of the core rod 11 is inserted into the slot 211 and connected with fitting 21. Fitting 21 also has an annular fixing groove 212 on the circumferential side wall facing the sheath 14.

[0039] The zinc ring 22 is circular in shape and is located in the annular fixing groove 212. It is integrally formed with the fitting 21. The outer peripheral sidewall of the zinc ring 22 and the outer peripheral sidewall of the fitting 21 are located on the same side. The circumferential sidewall of one side of the zinc ring 22 abuts against the circumferential sidewall of the insertion cavity 141, while the circumferential sidewall of the other side of the zinc ring 22 is exposed.

[0040] A pressure ring 213 is fixed to the end of the fitting 21. The pressure ring 213 is circular in shape. The lower edge of the pressure ring 213 facing away from the insertion cavity 141 circumferential side wall is smoothly transitioned to avoid collision and damage when the fitting 21 is inserted with the core rod 11.

[0041] An annular groove 214 is provided between the pressure ring 213 and the fitting 21. The protruding ring 142 is located in the annular groove 214 and engages with the annular groove 214, which improves the bonding force between the fitting 21 and the sheath 14 and can form a good sealing effect to prevent moisture or contaminants from entering the interior of the fitting 21.

[0042] The pressure ring 213 abuts against the bottom of the insertion cavity 141. The outer diameter of the pressure ring 213 is smaller than the outer diameter of the fitting 21. The lower edge of the pressure ring 213 facing the side wall of the insertion cavity 141 is smoothly transitioned, which facilitates the pressure ring 213 sliding past the protruding ring 142. At the same time, the contact area between the upper side of the pressure ring 213 and the protruding ring 142 is smaller than the contact area between the lower side of the fitting 21 and the protruding ring 142, which facilitates the fitting 21 to be pulled out of the insertion cavity 141 and makes it easier for future maintenance.

[0043] The end assembly 2 also includes a fixing member 23, which is fixedly connected to the side of the fitting 21 facing away from the core rod 11. The fixing member 23 is used to receive the wire.

[0044] Example 2:

[0045] This second embodiment is a further improvement on the sheath 14 based on the first embodiment.

[0046] As attached Figure 2 and attached Figure 3As shown, a buffer ring 144 is fixed to the upper edge of the sheath 14 facing the fitting 21. The buffer ring 144 is a sheet structure of elastic material. When the fitting 21 is inserted into the insertion cavity 141, the end of the fitting 21 presses against the buffer ring 144 in the insertion cavity 141. When the pressure ring 213 abuts against the umbrella sleeve 12, the buffer ring 144 abuts against the circumferential sidewall of the zinc ring 22. Thus, the buffer ring 144 can disperse the stress generated between the zinc ring 22 and the sheath 14, and at the same time prevent moisture and other contaminants from entering the insertion cavity 141, thereby enhancing the sealing performance between the zinc ring 22 and the sheath 14.

[0047] In summary: A zinc ring 22 has been added at the contact point between the sheath 14 and the fitting 21. The zinc ring 22 has good corrosion resistance. When rainwater falls on the surface of the fitting 21, due to the principle of sacrificial anode, the zinc ring 22 will be corroded before the fitting 21, thus protecting the fitting 21 from corrosion. The zinc ring 22 protects the outer surface of the fitting 21, preventing the fitting 21 from rusting in different environments, and ensuring that the insulator can operate stably for a long time in different environments.

[0048] Meanwhile, the zinc ring 22 is located in the annular fixing groove 212 and is integrally formed with the fitting 21, which makes the zinc ring 22 more securely fixed on the fitting 21, enhancing its ability to resist external impact. The thickness of the zinc ring 22 can be increased to improve the service life of the zinc ring 22 on the insulator. When the thickness of the zinc ring 22 is increased, the structure of the zinc ring 22 located in the annular fixing groove 212 and integrally formed with the fitting 21 ensures that the zinc ring 22 will not easily fall off during operation, thus improving the safety performance of the insulator.

[0049] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of protection claimed in this application.

Claims

1. A corrosion-resistant de-icing insulator, comprising an insulating component (1) and an end component (2), wherein the end of the insulating component (1) is fixed with a sheath (14), the sheath (14) having a insertion cavity (141) therein, and the end component (2) comprising a fitting (21), the end of which is inserted into the insertion cavity (141), characterized in that, The end assembly (2) further comprises a zinc ring (22), an annular fixing groove (212) is formed on the circumferential side wall of the metal fitting (21), the zinc ring (22) is located in the annular fixing groove (212) and is integrally formed with the metal fitting (21), one side of the zinc ring (22) abuts against the circumferential side wall of the insertion cavity (141), and the other side of the zinc ring (22) is exposed outside.

2. The corrosion resistant ice melting insulator of claim 1, wherein, The outer circumferential side wall of the zinc ring (22) is located on the same side as the outer circumferential side wall of the metal fitting (21).

3. The corrosion resistant ice melting insulator of claim 1, wherein, An abutting ring (213) is fixed on the end of the metal fitting (21), an annular clamping groove (214) is formed between the abutting ring (213) and the metal fitting (21), a convex ring (142) is fixed on the inner side wall of the insertion cavity (141), and the convex ring (142) is clamped with the annular clamping groove (214).

4. The corrosion resistant ice melting insulator of claim 3, wherein, The outer circumferential diameter of the abutting ring (213) is smaller than the outer circumferential diameter of the metal fitting (21).

5. The corrosion resistant ice melting insulator of claim 3, wherein the metal is selected from the group consisting of aluminum, aluminum alloys, zinc, zinc alloys, and combinations thereof. The lower edge of the abutting ring (213) on the side of the circumferential side wall of the insertion cavity (141) is transitionally smooth.

6. The corrosion resistant ice melting insulator of claim 3, wherein, The end of the metal fitting (21) is sleeved outside the core rod (11), and the lower edge of the abutting ring (213) on the side away from the circumferential side wall of the insertion cavity (141) is transitionally smooth.

7. A corrosion resistant ice melting insulator according to claim 6, wherein An upwardly protruding inner sealing ring (143) is fixed on the bottom of the insertion cavity (141), and the inner sealing ring (143) abuts against the circumferential side wall of the core rod (11).

8. The corrosion resistant ice melting insulator of claim 1, wherein, A buffer ring (144) is fixed on the upper edge of the circumferential side wall of the insertion cavity (141), and the buffer ring (144) abuts against the circumferential side wall of the zinc ring (22).

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