Weather-resistant, fire-resistant insulating shroud

Abstract

The utility model discloses weather -resistant fire -retardant insulating shield, including shield body and extension pipe cover, the left side of extension pipe cover is connected with the right side of shield body, the shield body includes PVC base material layer. The utility model adopts the composite structure of " base material layer - insulating layer - fire -retardant layer - protective layer", and PVC base material layer provides stable support, and epoxy resin insulating layer and cross -linked polyethylene macromolecule insulating layer form double insulating barrier, and volume resistivity breaks through 1*10 14 Ω. cm, effectively insulates the risk of electric leakage, and the fire -retardant layer formed by polytetrafluoroethylene and silicone fire -retardant paint has an oxygen index of no less than 32%, can quickly form fire -retardant carbon layer, prevents flame from spreading, satisfies the fire -retardant demand of industry and outdoors, and the polyvinyl chloride layer of the protective layer outer layer adds anti -aging agent and ultraviolet absorber, has no cracking and discoloration phenomenon after 1000h of artificial accelerated aging test, can adapt to the wide temperature environment of -40 to 80 DEG C and outdoor strong ultraviolet irradiation, and solves the problem of easy aging of traditional shield.

Description

Technical Field

[0001] This utility model relates to the field of insulating covers, specifically to weather-resistant and flame-retardant insulating covers. Background Technology

[0002] In power systems, industrial equipment, and outdoor electrical facilities, insulating covers are key components for ensuring electrical safety. Their main function is to isolate live parts from the external environment and prevent short circuits, leakage, and electric shock accidents.

[0003] When used outdoors, existing insulating covers are susceptible to corrosion from natural factors such as ultraviolet rays, wind, rain, and alternating high and low temperatures, leading to material aging and decreased insulation performance. In industrial settings with high temperatures and abundant flammable and explosive dust, some covers have insufficient flame retardant ratings and are easily ignited by open flames or high temperatures, posing safety hazards. Traditional covers have a simple structure and poor compatibility with electrical components of different specifications, making them prone to loosening and falling off after installation, further reducing the reliability of protection.

[0004] Therefore, it is necessary to provide a weather-resistant and flame-retardant insulating cover to solve the above-mentioned technical problems. The information disclosed in this background section is only intended to enhance the understanding of the overall background of this utility model, and is not necessarily to be regarded as an admission or to imply in any way that the information constitutes prior art that has become known to those skilled in the art. Utility Model Content

[0005] To address this issue, this utility model provides a weather-resistant and flame-retardant insulating cover. When used in conjunction with other materials, it solves the problem that insulating covers are susceptible to corrosion from natural factors such as ultraviolet radiation, wind, rain, and alternating high and low temperatures when used outdoors, leading to material aging and decreased insulation performance. In industrial settings with high temperatures and abundant flammable and explosive dust, some covers have insufficient flame retardant ratings, making them prone to combustion upon contact with open flames or high temperatures, posing safety hazards. Traditional covers also have a simple structure, poor compatibility with electrical components of different specifications, and are prone to loosening and falling off after installation, further reducing the reliability of protection.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a weather-resistant and flame-retardant insulating cover, comprising a cover body and an extension sleeve, wherein the left side of the extension sleeve is connected to the right side of the cover body, the cover body comprises a PVC substrate layer, an insulating material layer is disposed on the outer surface of the PVC substrate layer, a flame-retardant layer is disposed on the outer surface of the insulating material layer, a protective layer is disposed on the outer surface of the flame-retardant layer, the protective layer comprises a polymer insulating layer, a polyvinyl chloride layer is disposed on the outer surface of the polymer insulating layer, the flame-retardant layer comprises a polytetrafluoroethylene layer, and an organosilicon flame-retardant coating layer is disposed on the outer surface of the polytetrafluoroethylene layer. The various layers are tightly bonded together with a special adhesive to ensure synergistic performance.

[0007] Preferably, an extension block is provided at the connection between the lower end of the inner cavity of the extension tube and the left side of the protective cover body. A through groove is provided on the inner side of the extension block at the lower end of the inner cavity of the extension tube and the left side of the protective cover body. The through groove can be used for cable installation and heat dissipation.

[0008] Preferably, the thickness of the PVC substrate layer is 1.2-2.0 mm, the insulating material layer is made of epoxy resin insulating material with a thickness of 0.8-1.5 mm, and the insulating material layer and the PVC substrate layer are tightly bonded together by polyurethane adhesive with a bonding strength of not less than 2.5 MPa, effectively preventing interlayer peeling.

[0009] Preferably, the thickness of the polytetrafluoroethylene layer 501 is 0.5-1.0 mm, the thickness of the organosilicon flame retardant coating layer is 0.3-0.8 mm, and its oxygen index is not less than 32%, meeting the B1 flame retardant requirements in GB 8624-2012 standard. When exposed to fire, it can form a dense char layer to block the spread of combustion.

[0010] Preferably, the polymer insulating layer is made of cross-linked polyethylene material with a thickness of 0.6-1.2 mm and a volume resistivity of not less than 1×10⁻⁶. 14 The polyvinyl chloride layer has an Ω·cm thickness and contains anti-aging agents and ultraviolet absorbers. The thickness is 0.4-0.9mm, which can effectively resist ultraviolet radiation and environmental erosion.

[0011] Preferably, the protective cover body and the extension sleeve are integrally injection molded structures. The inner wall of the extension sleeve is provided with anti-slip ridges, and the anti-slip ridges are evenly distributed along the axial direction of the extension sleeve. The spacing between adjacent ridges is 2-5mm, which can increase the friction with the protected parts and prevent the protective cover from shifting.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model adopts a composite structure of "substrate layer - insulation layer - flame retardant layer - protective layer". The PVC substrate layer provides stable support, and the epoxy resin insulation layer and the cross-linked polyethylene polymer insulation layer form a double insulation barrier, with a volume resistivity exceeding 1×10⁻⁶. 14 With an Ω·cm rating, it effectively isolates the risk of leakage. The flame-retardant layer, composed of polytetrafluoroethylene and silicone flame-retardant coating, has an oxygen index of not less than 32%, which can quickly form a flame-retardant char layer to prevent the spread of flames and meet the flame-retardant requirements of industrial and outdoor applications. The outer polyvinyl chloride layer of the protective layer is enriched with anti-aging agents and ultraviolet absorbers. After 1000 hours of accelerated aging test, there is no cracking or discoloration. It can adapt to a wide temperature range of -40℃ to 80℃ and strong ultraviolet radiation outdoors, solving the problem of easy aging of traditional protective covers.

[0014] 2. This utility model features an integrally injection-molded protective cover body with no assembly gap between it and the extension tube sleeve. The anti-slip ridges on the inner wall of the extension tube sleeve can be adapted to electrical components of different specifications, making it less prone to displacement after installation. The through-groove design facilitates cable routing and enables internal heat dissipation, avoiding the problem of temperature rise caused by a closed environment. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of this utility model;

[0016] Figure 2 A schematic diagram of the left side of the protective cover body and extension sleeve structure provided by this utility model;

[0017] Figure 3 Left top view of the extension sleeve and protective cover body structure provided by this utility model;

[0018] Figure 4 This is a partial cross-sectional view of the protective cover body structure provided by this utility model;

[0019] Figure 5 This is a partial cross-sectional view of the flame-retardant layer structure provided by this utility model;

[0020] Figure 6 A partial cross-sectional view of the protective layer structure provided by this utility model.

[0021] In the diagram: 1. Protective cover body; 2. Extension sleeve; 3. PVC substrate layer; 4. Insulation material layer; 5. Flame retardant layer; 501. Polytetrafluoroethylene layer; 502. Organosilicon flame retardant coating layer; 6. Protective layer; 601. Polymer insulation layer; 602. Polyvinyl chloride layer. Detailed Implementation

[0022] 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.

[0023] Example 1, refer to Appendix Figure 1-6The weather-resistant and flame-retardant insulating cover provided by this utility model includes a cover body 1 and an extension sleeve 2. The left side of the extension sleeve 2 is connected to the right side of the cover body 1. The cover body 1 includes a PVC substrate layer 3. An insulating material layer 4 is provided on the outer surface of the PVC substrate layer 3. A flame-retardant layer 5 is provided on the outer surface of the insulating material layer 4. A protective layer 6 is provided on the outer surface of the flame-retardant layer 5. The protective layer 6 includes a polymer insulating layer 601. A polyvinyl chloride layer 602 is provided on the outer surface of the polymer insulating layer 601. The flame-retardant layer 5 includes a polytetrafluoroethylene layer 501. An organosilicon flame-retardant coating layer 502 is provided on the outer surface of the polytetrafluoroethylene layer 501.

[0024] The usage process of this utility model is as follows: When using this utility model, the cable is threaded through the through-slot cavity of the extension sleeve 2 so that the protective cover body 1 completely covers the charged core area. The extension sleeve 2 is fitted onto the extension section of the component, and the anti-slip ridges on the inner wall are tightly attached to the surface of the component to achieve stable fixation. The PVC substrate layer 3 provides structural support for the whole and prevents the protective cover from being deformed by pressure. The epoxy resin insulation material layer 4 and the cross-linked polyethylene polymer insulation layer 601 work together to block the current path between the charged body and the outside world and avoid leakage. When encountering high temperature or open flame, the polytetrafluoroethylene layer 501 plays a basic role in high temperature resistance, and the organosilicon flame retardant coating layer 502 quickly carbonizes to form a dense protective layer to prevent the flame from burning through the protective cover. The outer polyvinyl chloride protective layer 6 resists environmental erosion such as ultraviolet rays and wind and rain, and slows down the aging rate of the internal structure.

[0025] Example 2: The weather-resistant and flame-retardant insulating cover provided by this utility model differs from that in Example 1 in that:

[0026] Refer to the instruction manual appendix Figure 1-6 In this embodiment, the weather-resistant and flame-retardant insulating cover has an extension block at the connection between the lower end of the inner cavity of the extension sleeve 2 and the left side of the cover body 1. A through-groove is formed on the inner side of the extension block at the lower end of the inner cavity of the extension sleeve 2 and the left side of the cover body 1. The PVC substrate layer 3 has a thickness of 1.2-2.0 mm. The insulating material layer 4 is made of epoxy resin insulating material with a thickness of 0.8-1.5 mm, and the insulating material layer 4 is tightly bonded to the PVC substrate layer 3 with polyurethane adhesive. The polytetrafluoroethylene layer 501 has a thickness of 0.5-1.0 mm. The silicone flame-retardant coating layer 502 has a thickness of 0.3-0.8 mm. The polymer insulating layer 601 is made of cross-linked polyethylene material with a thickness of 0.6-1.2 mm and a volume resistivity of not less than 1×10⁻⁶. 14 The 602 polyvinyl chloride layer contains anti-aging agents and ultraviolet absorbers, with a thickness of 0.4-0.9 mm. The protective cover body 1 and the extension sleeve 2 are integrally injection molded structures. The inner wall of the extension sleeve 2 is provided with anti-slip ridges, which are evenly distributed along the axial direction of the extension sleeve 2, with a spacing of 2-5 mm between adjacent ridges.

[0027] The specific implementation scenario is as follows: When using this utility model, cables are threaded through the through-groove cavity of the extension sleeve 2, so that the protective cover body 1 completely covers the live core area. The extension sleeve 2 is fitted onto the extension section of the component, and the anti-slip ridges on the inner wall are tightly fitted to the surface of the component to achieve stable fixation. The PVC substrate layer 3 provides structural support for the whole and prevents the protective cover from deforming under pressure. The epoxy resin insulation material layer 4 and the cross-linked polyethylene polymer insulation layer 601 work together to block the current path between the live body and the outside world, avoiding leakage. When exposed to high temperature or open flame, the polytetrafluoroethylene... The ethylene layer 501 provides high-temperature resistance, while the silicone flame-retardant coating layer 502 rapidly carbonizes to form a dense protective layer, preventing flames from burning through the shield. The outer polyvinyl chloride protective layer 6 resists environmental erosion such as ultraviolet rays and wind and rain, slowing down the aging of the internal structure. The shield body 1 and the extension sleeve 2 are integrally molded with no easily damaged connecting parts, requiring no special maintenance in daily life, only periodic cleaning of surface dust. If it is necessary to inspect the internal electrical components, the shield body 1 and the extension sleeve 2 can be removed directly along the axis, which is simple to operate and does not affect the performance of the components themselves.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, this utility model will not explain the control method and circuit connection in detail. The external controller mentioned in the specification can play a control role for the electrical components mentioned in this article, and the external controller is a conventional known device.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A weather-resistant and flame-retardant insulating cover, comprising a cover body (1) and an extension sleeve (2), characterized in that: The left side of the extension sleeve (2) is connected to the right side of the protective cover body (1). The protective cover body (1) includes a PVC substrate layer (3). An insulating material layer (4) is provided on the outer surface of the PVC substrate layer (3). A flame retardant layer (5) is provided on the outer surface of the insulating material layer (4). A protective layer (6) is provided on the outer surface of the flame retardant layer (5). The protective layer (6) includes a polymer insulating layer (601). A polyvinyl chloride layer (602) is provided on the outer surface of the polymer insulating layer (601). The flame retardant layer (5) includes a polytetrafluoroethylene layer (501). An organosilicon flame retardant coating layer (502) is provided on the outer surface of the polytetrafluoroethylene layer (501).

2. The weather-resistant and flame-retardant insulating cover according to claim 1, characterized in that: An extension block is provided at the connection between the lower end of the inner cavity of the extension sleeve (2) and the left side of the protective cover body (1). A through groove is provided on the inner side of the extension block at the lower end of the inner cavity of the extension sleeve (2) and the left side of the protective cover body (1).

3. The weather-resistant and flame-retardant insulating cover according to claim 1, characterized in that: The thickness of the PVC substrate layer (3) is 1.2-2.0 mm, the insulation material layer (4) is made of epoxy resin insulation material and has a thickness of 0.8-1.5 mm, and the insulation material layer (4) and the PVC substrate layer (3) are tightly bonded together by polyurethane adhesive.

4. The weather-resistant and flame-retardant insulating cover according to claim 1, characterized in that: The thickness of the polytetrafluoroethylene layer (501) is 0.5-1.0 mm, and the thickness of the silicone flame retardant coating layer (502) is 0.3-0.8 mm.

5. The weather-resistant and flame-retardant insulating cover according to claim 1, characterized in that: The polymer insulating layer (601) is made of cross-linked polyethylene material with a thickness of 0.6-1.2 mm and a volume resistivity of not less than 1×10⁻⁶. 14 The polyvinyl chloride layer (602) has an Ω·cm thickness, and contains anti-aging agents and ultraviolet absorbers. The thickness is 0.4-0.9 mm.

6. The weather-resistant and flame-retardant insulating cover according to claim 1, characterized in that: The protective cover body (1) and the extension sleeve (2) are integral injection molded structures. The inner wall of the extension sleeve (2) is provided with anti-slip ridges, and the anti-slip ridges are evenly distributed along the axial direction of the extension sleeve (2), with a spacing of 2-5mm between adjacent ridges.

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