Composite insulator with rubber coating structure

Abstract

The utility model discloses a composite insulator with a rubber coating structure, which comprises an insulating core rod, at least one annular piece is arranged on a rod body of the insulating core rod, and end hardware fittings are arranged at two ends of the rod body; the two ends of the annular piece and the ends, facing the annular piece, of the end hardware fittings are all provided with external flaring openings expanding outwards. Umbrella skirts are arranged on the insulating core rod between the annular pieces and / or between the annular pieces and the end hardware fittings; and the end parts of the umbrella skirts are embedded into the inner sides of the external flaring openings at the corresponding ends and form outer wrapping parts wrapping the external flaring openings. According to the composite insulator, the annular piece is arranged on the insulating core rod, so that the replacement frequency of a die end can be reduced, the forming efficiency is improved, and the production cost is reduced; and meanwhile, the contact ends of the umbrella skirts and the hardware fitting adopt rubber coating design, so that the bonding performance of the umbrella skirts and the core rod is improved, and the problems of rubber filling and swelling and poor bonding of the connection parts of the umbrella skirts during multi-section forming are solved.

Description

Technical Field

[0001] The utility model relates to a composite insulator with a rubber-encapsulated structure, belonging to the technical field of insulator preparation. Background Art

[0002] In the existing technology, the manufacture of composite insulators mainly adopts multi-stage molding technology, that is, the required shape is manufactured through multiple molding. In addition, in order to ensure the electrical and mechanical properties of the insulator, a special anti-impact glue design is usually used at the joint to prevent deformation and bulging at the joint or poor bonding between the shed and the core rod. Although the existing technology has solved the manufacturing problems of composite insulators to a certain extent, there are still some problems and shortcomings.

[0003] First, the existing molding technology often requires frequent replacement of the mold end, which not only increases production costs but also reduces production efficiency. Secondly, although the existing anti-collision glue design can prevent the glue from collapsing to a certain extent, in actual operation, the phenomenon of glue bulging will still occur at the shed joint, which affects the bonding performance between the shed and the core rod, and then leads to the occurrence of rod channeling and the poor glue coating at the end of the product caused by the rod channeling phenomenon. At the same time, due to the characteristics of the materials used in the shed, there will also be poor bonding caused by poor connection between the materials at the shed joint. Utility Model Content

[0004] The utility model aims to provide a composite insulator with a rubber-coated structure. By arranging an annular piece on an insulating core rod, the frequency of replacing the mold end can be reduced, the molding efficiency can be improved and the production cost can be reduced. At the same time, the contact end of the shed and the hardware adopts a rubber-coated design, which improves the bonding performance of the shed and the core rod, solves the problem of rubber bulging and the problem of poor bonding at the shed joint during multi-stage molding.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A composite insulator with a rubber-coated structure comprises an insulating core rod, a rod body on which at least one ring is arranged, and end fittings are arranged at both ends of the rod body; both ends of the ring and one end of the end fitting facing the ring are formed with outwardly expanded openings; an shed is arranged on the insulating core rod between the rings and / or between the ring and the end fitting, and the ends of the shed are embedded in the inner side of the corresponding end outward expansion and form an outer package portion that wraps the outward expansion.

[0007] Preferably, the insulating core rod is an epoxy resin glass fiber drawing rod.

[0008] Preferably, the end fittings include low-voltage end fittings and high-voltage end fittings.

[0009] The beneficial effects of the utility model are:

[0010] 1. Optimize the connection design: by setting at least one ring on the rod body of the insulating core rod, and then injecting the shed between the end hardware and the ring (if there are multiple rings, including between the rings), and adopting a rubber coating design, the bonding performance between the shed and the insulating core rod can be effectively improved, and the occurrence of rubber bulging caused by poor bonding at the connection, as well as the secondary rod channeling phenomenon and the resulting poor rubber coating at the end can be prevented.

[0011] 2. Improve production efficiency: Since the present invention changes the structure of the product and arranges a ring-shaped piece on the insulating core rod, molding is more convenient, and the frequency of replacing the mold end during the process is reduced, thereby reducing labor and improving production efficiency.

[0012] 3. Diversity of shed materials: The structural design of the composite insulator makes some shed materials that were originally not suitable for multi-segment molding applicable, thereby improving the applicability of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0015] The main reference numerals in the figure have the following meanings:

[0016] 1. Low-voltage end fittings, 2. Insulating core rods, 3. Umbrella skirts, 4. Ring parts, 5. High-voltage end fittings, 6. External expansion ports, 7. External packaging parts. DETAILED DESCRIPTION

[0017] The utility model is specifically introduced below in conjunction with the accompanying drawings and embodiments.

[0018] This embodiment is a composite insulator with a rubber-encapsulated structure, such as Figure 1-2 As shown, it includes an insulating core rod 2 (epoxy resin glass fiber drawing rod), a ring part 4 is arranged on the rod body on the insulating core rod 2, and end fittings are arranged at both ends of the rod body (one end is a low-voltage end fitting 1, and the other end is a high-voltage end fitting 5); both ends of the ring part 4 and the end of the end fitting facing the ring part 4 are formed with outwardly expanding external expansions 6; an umbrella skirt 3 (including but not limited to vulcanized silicone rubber) is injection-molded in multiple stages on the insulating core rod 2 located between the ring part 4 and the end fitting, and the end of the umbrella skirt 3 is embedded in the inner side of the corresponding end external expansion 6 and forms an outer package 7 (rubber-wrapped design) that wraps the external expansion.

[0019] During the actual molding, firstly, the low-voltage end fitting 1 or the high-voltage end fitting 5 is crimped to one end of the insulating core rod 2, and then the ring 4 is fixed to the rod body of the insulating core rod 2, and then the other end fitting is crimped to the other end of the insulating core rod 2. Then, the shed 3 is injection molded on the insulating core rod 2 between the low-voltage end fitting 1 and the ring 4 and the high-voltage end fitting 5 and the ring 4 in sequence by a molding machine. Since both ends of the ring 4 and one end of the end fitting facing the ring 4 are formed with an outwardly expanding outer opening 6, when the shed 3 is injection molded on the insulating core rod 2 by a molding machine, a part of the end of the shed 3 will be embedded in the inner side of the outer opening 6, and a part will wrap the outer opening 6 to form a rubber-encapsulated structure.

[0020] The arrangement of the annular member and the design of the rubber coating structure can effectively improve the bonding performance between the shed and the insulating core rod, and prevent the occurrence of rubber bulging caused by poor bonding at the joint, secondary rod channeling and the resulting poor rubber coating at the end. At the same time, molding is more convenient, labor is reduced, and production efficiency is improved.

[0021] The above is only a preferred implementation of the utility model patent. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model patent. These improvements and modifications should also be regarded as the protection scope of the utility model patent.

Claims

1. A composite insulator with a rubber-coated structure, characterized in that: The invention comprises an insulating core rod, wherein at least one ring is arranged on the rod body of the insulating core rod, and end fittings are arranged at both ends of the rod body; both ends of the ring and one end of the end fitting facing the ring are formed with outwardly expanded openings; an umbrella skirt is arranged on the insulating core rod between the rings and / or between the ring and the end fitting, and the end of the umbrella skirt is embedded in the inner side of the corresponding end outward expansion opening and forms an outer package part wrapping the outward expansion opening.

2. The composite insulator with a rubber-coated structure according to claim 1, characterized in that: The insulating core rod is an epoxy resin glass fiber drawing rod.

3. The composite insulator with a rubber-coated structure according to claim 1, characterized in that: The end fittings include low-voltage end fittings and high-voltage end fittings.

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