Composite insulator

Abstract

The utility model provides a kind of composite insulator, including core rod and several umbrella skirts, and several first plug-in fittings are arranged on the outer peripheral wall of core rod with axial interval;Several umbrella skirts are set one by one with several first plug-in fittings, the top of umbrella skirt has the mounting sleeve of being set on the outer periphery of core rod, the inner peripheral wall of mounting sleeve is equipped with the first slot for being inserted with plug-in fitting, and the aperture for being passed through by core rod is equipped on umbrella skirt and mounting sleeve;Wherein, the top surface of umbrella skirt and the outer peripheral wall of mounting sleeve are coated with sealing protective layer.The composite insulator provided by the utility model can be quickly disassembled and replaced on the spot when corresponding damaged umbrella skirt, without disassembling whole insulator for factory repair, time and effort are saved, and cost is saved.

Description

Technical Field

[0001] This utility model belongs to the field of composite insulator technology, and more specifically, relates to a composite insulator. Background Technology

[0002] In the early days, insulators were mostly used on utility poles. Gradually, they evolved into disc-shaped insulators hung at one end of high-voltage power line towers to increase creepage distance. These were typically made of glass or ceramic and were called insulators. With technological advancements, composite insulators have emerged, consisting of a glass fiber resin core rod (or core tube), a protective sleeve made of organic materials, and sheds. The sheds of composite insulators, as key protective components, have two core functions: enhancing electrical breakdown withstand capability and effectively preventing pollution flashover. The conventional manufacturing process for these insulating materials uses an industrialized mass production model. After manufacturing, they are transported to the power construction site and then installed on the transmission line by construction personnel. It is noteworthy that during logistics transportation and on-site installation, despite protective measures, there is still a certain probability of mechanical damage to the shed surface, manifesting as scratches or structural breakage. This can easily affect the mechanical strength and breakdown strength of the actual transmission line, posing certain safety hazards.

[0003] In existing technologies, if the sheds of a composite insulator are damaged, a complete disassembly and factory repair process is required. During the professional repair phase, reinforcement work must be carried out using the original factory's hot-pressing molding process or specialized repair tooling matched to the properties of silicone rubber materials. This is time-consuming and labor-intensive. Furthermore, the number of sheds on a composite insulator is not fixed, their locations are scattered, and all sheds are integrated, often resulting in partial shed damage in actual use. If the entire insulator needs to be disassembled and repaired regardless of its condition, it's equivalent to repairing even the undamaged sheds, wasting both cost and time. Utility Model Content

[0004] This utility model provides a composite insulator that allows for quick on-site disassembly and replacement of damaged skirts without the need to disassemble the entire insulator for factory repair, saving time, effort, and costs.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a composite insulator is provided, including a core rod and several sheds. Several first connectors are axially spaced on the outer peripheral wall of the core rod. The several sheds are arranged in a one-to-one correspondence with the several first connectors. The top of the shed has a mounting sleeve that is fitted onto the outer periphery of the core rod. The inner peripheral wall of the mounting sleeve is provided with a first slot for insertion and engagement with the connectors. Both the sheds and the mounting sleeve are provided with notches for the core rod to pass through. The top surface of the sheds and the outer peripheral wall of the mounting sleeve are coated with a sealing protective layer.

[0006] In one possible implementation, a limiting platform is provided at the port of the first slot, converging towards the central axis. The first insertion member includes an insertion post and an abutment platform. The insertion post is connected to the outer peripheral wall of the mandrel and extends radially. The abutment platform is connected to the outer end of the insertion post, and the diameter of the abutment platform is larger than the diameter of the insertion post. The abutment platform is used to engage with the limiting platform to prevent the abutment platform from dislodging from the first slot.

[0007] In some embodiments, the end of the abutment platform away from the plug has an outwardly curved surface.

[0008] In one possible implementation, the two side walls of the notch are respectively provided with abutment strips that abut against each other, and the adjacent sides of the two abutment strips are respectively provided with second slots and second plug-in parts that fit into the second slots, for locking the umbrella skirt and the core rod in the engagement position.

[0009] In some embodiments, the second slot and the second connector are provided in several groups at intervals along the extension direction of the abutment strip.

[0010] In one possible implementation, the upper surface of the mounting sleeve is coated with a sealing protective layer.

[0011] In one possible implementation, the notch is filled with silicone filler.

[0012] In one possible implementation, the sealing and protective layer comprises, from the inside out, liquid silicone, conductive silicone, and fluorosilicone rubber.

[0013] Compared with the prior art, the composite insulator provided in this embodiment can quickly disassemble the umbrella skirt when a certain skirt is damaged. The sealing and protective layer is broken through the gap, and the umbrella skirt is torn open through the gap. The gap is opened so that the first plug can be dislodged from the first slot and the core rod can be dislodged from the gap.

[0014] The new insulator skirt is prepared, the notch of the skirt is opened, and the core rod is inserted through the notch. After the first connector is inserted into the corresponding first slot (restraining the circumferential rotation and axial movement of the skirt), the sealing and protective layer is applied, and the installation of the skirt can be completed quickly. Damaged skirts can be quickly disassembled and replaced on the spot without disassembling the entire insulator and returning it to the factory for repair, saving time, effort and costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1This is a front view schematic diagram of the composite insulator provided in an embodiment of the present utility model;

[0017] Figure 2 This is a front cross-sectional view of the composite insulator provided in an embodiment of the present utility model;

[0018] Figure 3 This is an embodiment of the present utility model. Figure 2 A magnified schematic diagram of the local structure at point I;

[0019] Figure 4 This is an embodiment of the present utility model. Figure 1 A front view diagram of the structure after the sealing and protective layer has been removed;

[0020] Figure 5 This is an embodiment of the present utility model. Figure 4 A schematic diagram of the partial sectional view of the central umbrella skirt;

[0021] Figure 6 This is an embodiment of the present utility model. Figure 5 A magnified schematic diagram of the structure at point II.

[0022] The following are the labeling elements in the figure:

[0023] 10. Core rod; 20. First connector; 21. Connecting post; 22. Abutment platform; 23. Curved surface; 30. Umbrella skirt; 31. Notch; 32. Mounting sleeve; 321. First slot; 322. Limiting platform; 33. Abutment strip; 331. Second slot; 40. Sealing protective layer; 50. Second connector. Detailed Implementation

[0024] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0025] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a number" means two or more, unless otherwise explicitly specified.

[0026] Please see Figures 1 to 6 The composite insulator provided by this utility model will now be described. The composite insulator includes a core rod 10 and a plurality of sheds 30. A plurality of first plug-in members 20 are axially spaced on the outer peripheral wall of the core rod 10. The plurality of sheds 30 are arranged in a one-to-one correspondence with the plurality of first plug-in members 20. The top of the sheds 30 has a mounting sleeve 32 that is fitted around the outer periphery of the core rod 10. The inner peripheral wall of the mounting sleeve 32 is provided with a first slot 321 for insertion and engagement with the plug-in members. Both the sheds 30 and the mounting sleeve 32 are provided with notches 31 for the core rod 10 to pass through. The top surface of the sheds 30 and the outer peripheral wall of the mounting sleeve 32 are coated with a sealing protective layer 40.

[0027] Furthermore, the notch 31 includes a first separation port extending axially along the mounting sleeve 32 and a second separation port extending along the curved extension direction of the umbrella skirt 30. The first separation port communicates with the second separation port, and the second separation port has the same curvature as the umbrella skirt 30.

[0028] Furthermore, several sets of first connectors 20 are provided at intervals along the circumference of the mandrel 10.

[0029] Furthermore, the mandrel 10 is made of glass fiber and epoxy resin, which is the core component. It is composed of glass fiber and epoxy resin, and has both high strength and chemical resistance. Its tensile strength is 2-5 times that of ordinary steel and 3-8 times that of ceramic materials. It is resistant to chemical corrosion and is suitable for harsh environments such as acids and alkalis. It also has excellent resistance to bending fatigue, creep and impact.

[0030] Furthermore, the umbrella skirt 30 is made of silicone rubber, which has a certain elastic deformation capability. It is made of aging-resistant polymer material and covers the outer surface of the core rod 10, providing electrical insulation and mechanical protection. Its aerodynamic design reduces wind resistance. It has excellent anti-fouling function, and its surface is specially treated to reduce the risk of contamination flashover.

[0031] Furthermore, the sealing and protective layer 40 helps to cover the opening 31 and the gap between the umbrella skirt 30 and the core rod 10, preventing the infiltration of rainwater, sand, and other objects, and ensuring the normal use of the umbrella skirt 30.

[0032] Optionally, the first connector 20 is cylindrical.

[0033] Optionally, the port of the first slot 321 is provided with a limiting platform 322 that converges towards the central axis. The first insertion member 20 includes an insertion post 21 and an abutment platform 22. The insertion post 21 is connected to the outer peripheral wall of the core rod 10 and extends radially. The abutment platform 22 is connected to the outer end of the insertion post 21. The diameter of the abutment platform 22 is larger than the diameter of the insertion post 21. The abutment platform 22 is used to abut against the limiting platform 322 to prevent the abutment platform 22 from dislodging from the first slot 321.

[0034] Optionally, the first connector 20 includes an insertion post connected to the outer peripheral wall of the core rod 10 and serrations disposed on the outer peripheral wall of the insertion post. The serrations extend obliquely toward the core rod 10 and are used to contact and engage with the inner peripheral wall of the first slot 321 to increase the separation resistance between them.

[0035] This application provides a composite insulator in which, during actual use, when one of the skirts 30 is damaged, the sealing protective layer 40 is broken through the notch 31, and the skirt 30 is torn open through the notch 31, so that the first plug 20 can be dislodged from the first slot 321, and the core rod 10 can be dislodged from the notch 31, thus quickly completing the disassembly of the skirt 30.

[0036] The prepared new umbrella skirt 30 is opened with the notch 31, allowing the core rod 10 to enter through the notch 31. After the first connector 20 is inserted into the corresponding first slot 321 (restricting the circumferential rotation and axial movement of the umbrella skirt 30), the sealing protective layer 40 is applied, and the installation of the umbrella skirt 30 can be completed quickly. The corresponding damaged umbrella skirt 30 can be quickly disassembled and replaced on the spot without disassembling the entire insulator for factory repair, saving time, effort, and costs.

[0037] In one possible implementation, the first slot 321 described above adopts as follows: Figure 2 and Figure 3 The structure shown is described in the following document. Figure 2 and Figure 3The first slot 321 has a limiting platform 322 at its port that converges toward the central axis. The first plug-in member 20 includes a plug post 21 and an abutment platform 22. The plug post 21 is connected to the outer peripheral wall of the core rod 10 and extends radially. The abutment platform 22 is connected to the outer end of the plug post 21. The diameter of the abutment platform 22 is larger than the diameter of the plug post 21. The abutment platform 22 is used to abut against the limiting platform 322 to prevent the abutment platform 22 from dislodging from the first slot 321.

[0038] Specifically, since the umbrella skirt 30 is made of silicone, it has a certain elastic deformation capability. During the process of inserting the first connector 20 into the first slot 321, the inner peripheral wall of the first slot 321 undergoes elastic deformation, which facilitates the insertion of the first connector 20. After the insertion is completed, the first slot 321 returns to its initial state. When the first connector 20 is slightly pulled outward, the abutment platform 22 and the limiting platform 322 abut against each other to restrict the first connector 20 from leaving the first slot 321. The insertion and engagement of the first connector 20 and the first slot 321 can not only position the installation position of the umbrella cap and restrict the axial movement or circumferential rotation of the umbrella cap, but also restrict the first connector 20 from leaving the first slot 321 through the limiting engagement of the abutment platform 22 and the limiting platform 322, thereby improving the connection stability between the umbrella cap and the core rod 10.

[0039] When it is necessary to remove the umbrella cap, simply pull the umbrella skirt 30 with force to disengage the first connector 20 from the first slot 321, which also improves the convenience of disassembly.

[0040] In some embodiments, see Figure 2 and Figure 3 The end of the contact platform 22 away from the insertion post 21 has an outwardly curved surface 23.

[0041] Specifically, the arc-shaped surface 23 is a smooth surface, which can ensure the smooth insertion of the first connector 20 into the first slot 321 and has a certain guiding function.

[0042] In one possible implementation, the first slot 321 described above adopts as follows: Figure 1 , Figure 2 and Figures 4 to 6 The structure shown is described in the following document. Figure 1 , Figure 2 and Figures 4 to 6 The two sides of the notch 31 are respectively provided with abutment strips 33 that abut against each other. The adjacent sides of the two abutment strips 33 are respectively provided with second slots 331 and second plug-in parts 50 that are inserted into the second slots 331 to lock the umbrella skirt 30 and the core rod 10 in the same position.

[0043] Specifically, the abutment strip 33 extends from the top of the mounting sleeve 32 to the outer edge of the umbrella skirt 30, and has the same overall curvature as the umbrella skirt 30. The thickness of the abutment strip 33 is less than the thickness of the umbrella skirt 30. One abutment strip 33 is located near the inner wall of the umbrella skirt 30, and the other abutment strip 33 is located near the outer wall of the umbrella skirt 30. The abutment strip 33 near the outer wall of the umbrella skirt 30 is stacked on the outer wall of the abutment strip 33 near the inner wall of the umbrella skirt 30. The stacked thickness is approximately the thickness of the umbrella skirt 30 itself, and the second connector 50 is made of silicone.

[0044] Furthermore, a second slot 331 is provided on the abutment strip 33 near the inner wall of the umbrella skirt 30, and a second plug-in member 50 is provided on the abutment strip 33 near the outer wall of the umbrella skirt 30 to engage with the second slot 331, for connecting the two side walls of the notch 31, so that the umbrella skirt 30 stably surrounds the outer periphery of the core rod 10.

[0045] Furthermore, the port of the second slot 331 is provided with an anti-detachment platform that converges towards the central axis. The second connector 50 includes an anti-detachment post and a pressing platform. The anti-detachment post is connected to the abutment strip 33 near the outer wall of the umbrella skirt 30. The pressing platform is connected to the outer end of the anti-detachment post, and the diameter of the pressing platform is larger than the diameter of the anti-detachment post. The pressing platform is used to abut against the anti-detachment platform to prevent the second connector 50 from dislodging from the first slot 321. That is, the structure of the first connector 20 is the same as the structure of the second connector 50, and the shape of the first slot 321 is the same as the shape of the second slot 331.

[0046] In some embodiments, see Figure 5 and Figure 6 The second slot 331 and the second connector 50 are provided in several groups at intervals along the extension direction of the abutment strip 33.

[0047] Specifically, a second slot 331 and a corresponding second connector 50 that engages with it form a group. The arrangement of multiple groups of second slots 331 and second connectors 50 can enhance the connection stability at the notch 31. Furthermore, when disassembling the umbrella skirt 30, one only needs to apply upward force with one hand and downward force with the other hand on both sides of the notch 31 to tear the notch 31, thereby separating the second slot 331 and the second connector 50, thus quickly completing the disassembly of the umbrella skirt 30.

[0048] In one possible implementation, the aforementioned mounting sleeve 32 adopts the following... Figure 1 and Figure 2 The structure shown is described in the following document. Figure 1 and Figure 2 The upper surface of the mounting sleeve 32 is coated with a sealing protective layer 40.

[0049] Specifically, the sealing and protective layer 40 is also coated at the joint between the mounting sleeve 32 and the core rod 10, which helps to block the gap and prevent the infiltration of rainwater, sand and other objects, thus ensuring the normal use of the umbrella skirt 30.

[0050] In one possible implementation, the notch 31 is filled with silicone filler.

[0051] Specifically, the silicone filler is made of the same material as the silicone material of the umbrella skirt 30 and is used to fill the gap 31 to increase the connection stability of the gap 31 and reduce the tearing force borne by the sealing and protective layer 40 at the gap 31.

[0052] In one possible implementation, the sealing protective layer 40 comprises, from the inside out, liquid silicone, conductive silicone, and fluorosilicone rubber.

[0053] Specifically, liquid silicone has an adaptive filling function, which can further fill the gaps on the shed 30 and between the shed 30 and the core rod 10; conductive silicone has excellent conductivity and is suitable for rubber products that require conductivity; fluorosilicone rubber has excellent weather resistance, chemical corrosion resistance and high temperature resistance. This combination can make full use of the advantages of each material, improving the overall performance and application range of the composite insulator.

[0054] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A composite insulator, characterized in that, include: The core rod has several first connectors spaced axially on its outer peripheral wall; as well as A plurality of umbrella skirts are provided in a corresponding manner to a plurality of first plug-in components. The top of each umbrella skirt has a mounting sleeve that is fitted around the outer periphery of the core rod. The inner peripheral wall of the mounting sleeve is provided with a first slot for insertion and engagement with the plug-in component. Both the umbrella skirt and the mounting sleeve are provided with notches for the core rod to pass through. The top surface of the umbrella skirt and the outer peripheral wall of the mounting sleeve are both coated with a sealing and protective layer.

2. The composite insulator as described in claim 1, characterized in that, The first slot has a limiting platform at its port that converges towards the central axis, and the first connector includes: A plug-in post, connected to the outer peripheral wall of the mandrel and extending radially; and An abutment platform is connected to the outer end of the insertion post. The diameter of the abutment platform is larger than the diameter of the insertion post. The abutment platform is used to abut against the limiting platform to prevent the abutment platform from dislodging from the first slot.

3. The composite insulator as described in claim 2, characterized in that, The end of the abutment platform away from the plug has an outwardly convex arc-shaped surface.

4. The composite insulator as described in claim 1, characterized in that, The two side walls of the notch are respectively provided with abutment strips that abut against each other. The adjacent sides of the two abutment strips are respectively provided with a second slot and a second plug-in member that is inserted into the second slot, which is used to lock the umbrella skirt and the core rod in the same position.

5. The composite insulator as described in claim 4, characterized in that, The second slot and the second connector are provided in several groups at intervals along the extension direction of the abutment bar.

6. The composite insulator as described in claim 1, characterized in that, The upper surface of the mounting sleeve is coated with the sealing and protective layer.

7. The composite insulator as described in claim 1, characterized in that, The notch is filled with silicone filler.

8. The composite insulator as described in claim 1, characterized in that, The sealing and protective layer comprises, from the inside out, liquid silicone, conductive silicone, and fluorosilicone rubber.

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