Aluminum well lid with lightning protection

Abstract

The utility model relates to garbage incineration manhole cover technical field, specifically is an aluminium manhole cover with lightning protection, including outer frame, well lid, well lid is located the upper end of outer frame, aluminium alloy base body, netted lightning current flow layer, honeycomb support frame, aluminium alloy base body, netted lightning current flow layer, honeycomb support frame set in well lid from top to bottom in proper order, through the multilayer composite structure design of aluminium alloy base body, netted lightning current flow layer and honeycomb support frame, the lightning protection performance of well lid has been improved significantly. Aluminium alloy base body provides light weight and corrosion -resistant basis, the multiple conical discharge teeth set up in the upper end can preferentially guide lightning current, avoid direct breakdown well lid surface, netted lightning current flow layer can quickly disperse lightning current, reduce local overheat risk, honeycomb support frame then strengthens structural strength and assists heat dissipation. The problem that traditional aluminium manhole cover is vulnerable under lightning environment, and the problem of insufficient drainage capacity are solved.

Description

Technical Field

[0001] This utility model relates to the field of waste incineration manhole cover technology, and in particular to an aluminum manhole cover with lightning protection. Background Technology

[0002] With the acceleration of urbanization, the scale of waste treatment facilities (such as waste incineration plants) is constantly expanding, placing higher demands on the safety and durability of supporting infrastructure. As an important component of ground facilities, manhole covers must possess properties such as high-temperature resistance, corrosion resistance, and lightning strike resistance in the special environments of waste incineration plants. Traditional cast iron or concrete manhole covers are prone to aging and increased electrical conductivity risks under the high temperatures, corrosive gases, and frequent lightning strikes of waste incineration plants, potentially leading to equipment damage or safety accidents.

[0003] Ordinary aluminum manhole covers lack efficient lightning discharge paths, and lightning current may be conducted to underground facilities through the manhole cover, threatening the safety of electrical equipment. The surface of the manhole cover does not effectively isolate the initial discharge of lightning, and the connection reliability between the internal conductive layer and the grounding system is low. The high temperature and acidic gases in waste incineration plants may accelerate metal oxidation, leading to a decrease in lightning protection performance. Therefore, an aluminum manhole cover with lightning protection is proposed to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide an aluminum manhole cover with lightning protection to solve the above-mentioned problems. It improves upon the lack of an efficient lightning discharge path in ordinary aluminum manhole covers, where lightning current may be conducted to underground facilities through the manhole cover, threatening the safety of electrical equipment. Furthermore, the surface of the manhole cover does not effectively isolate the initial discharge of lightning, the connection reliability between the internal conductive layer and the grounding system is low, and the high temperature and acidic gases in waste incineration plants may accelerate metal oxidation, leading to a decline in lightning protection performance.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: an aluminum manhole cover with lightning protection, comprising:

[0006] Outer frame;

[0007] Manhole cover, the manhole cover being located at the upper end of the outer frame;

[0008] An aluminum alloy substrate, a mesh lightning conduction layer, and a honeycomb support frame are sequentially arranged inside the manhole cover from top to bottom.

[0009] Multiple conical discharge teeth are fixedly connected to the upper end of the aluminum alloy substrate.

[0010] Preferably, the manhole cover and the outer frame are both fixedly connected to triangular mounting brackets. The upper ends of the two triangular mounting brackets are provided with circular holes, and bolts are provided in the two circular holes. Two nuts are threadedly connected to the circumferential surface of the bolts.

[0011] Preferably, a sealing strip is adhesively connected to the upper end of the outer frame, and the sealing strip is attached to the lower end of the manhole cover.

[0012] Preferably, the head of the conical discharge tooth is a planar design.

[0013] Preferably, the manhole cover has two reflective strips adhesively attached to its surface.

[0014] Preferably, three grounding lead frames are fixedly connected to the surface of the manhole cover, and the grounding lead frames are integrally formed with the manhole cover.

[0015] Preferably, the surface of the aluminum alloy substrate has an anodic oxide layer with a thickness of 3-6 μm, and the surface is sealed with fluorocarbon resin to form an insulating layer with volume resistance.

[0016] The beneficial effects of this utility model are:

[0017] 1. The multi-layered composite structure design, consisting of an aluminum alloy substrate, a mesh-like lightning conduction layer, and a honeycomb support frame, significantly improves the lightning protection performance of manhole covers. The aluminum alloy substrate provides a lightweight and corrosion-resistant foundation, while multiple conical discharge teeth at the top preferentially guide lightning current, preventing direct penetration of the manhole cover surface. The mesh-like lightning conduction layer quickly disperses lightning current, reducing the risk of localized overheating. The honeycomb support frame enhances structural strength and aids in heat dissipation. This design effectively solves the problems of traditional aluminum manhole covers being easily damaged and having insufficient discharge capacity under lightning strike conditions, while also considering lightweight and durability. It is particularly suitable for high-risk environments prone to lightning strikes, such as waste incineration plants.

[0018] 2. The installation sealing, grounding reliability, and environmental adaptability of the manhole cover have been optimized. The combination of the triangular mounting bracket and bolts ensures the manhole cover is firmly fixed, while the sealing strip prevents corrosive gases or liquids from seeping in; reflective strips enhance nighttime warning functionality and improve safety; the grounding down conductor frame is integrally formed with the manhole cover, ensuring reliable conduction of lightning current into the ground. Furthermore, the anodized insulation layer on the aluminum alloy substrate surface is sealed with fluorocarbon resin, which not only blocks the initial discharge of lightning but also withstands the high temperatures and chemical corrosion of waste incineration plants. The overall structure has significant advantages in lightning protection, mechanical strength, and environmental durability. Attached Figure Description

[0019] Figure 1 This is a front perspective view of the present invention;

[0020] Figure 2This is a sectional perspective view of the present invention;

[0021] Figure 3 This is an exploded view of the present invention.

[0022] In the diagram: 1. Manhole cover; 2. Outer frame; 3. Reflective strip; 4. Aluminum alloy substrate; 5. Conical discharge tooth; 6. Bolt; 7. Sealing strip; 8. Mesh lightning conduction layer; 9. Honeycomb support frame; 10. Grounding down conductor frame; 11. Nut; 12. Triangular mounting bracket. Detailed Implementation

[0023] 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.

[0024] Example 1

[0025] Please see Figures 1-3 The present invention provides the following technical solution:

[0026] An aluminum manhole cover with lightning protection includes:

[0027] Outer frame 2;

[0028] Manhole cover 1, located at the upper end of outer frame 2;

[0029] Aluminum alloy substrate 4, mesh lightning conduction layer 8, and honeycomb support frame 9 are sequentially arranged inside the manhole cover 1 from top to bottom.

[0030] Multiple conical discharge teeth 5 are fixedly connected to the upper end of the aluminum alloy substrate 4.

[0031] In a specific embodiment of this utility model, the outer frame 2 is made of high-strength cast iron or galvanized steel, used to fix the manhole cover 1 and provide support. The manhole cover 1 is generally round or square. The surface of the aluminum alloy substrate 4 is anodized to improve corrosion resistance. The mesh lightning conduction layer 8 is located below the aluminum alloy substrate 4 and is made of high-purity copper mesh to guide lightning current. The honeycomb support frame 9 is located below the mesh lightning conduction layer 8 to enhance the mechanical strength of the manhole cover 1. Multiple conical discharge teeth 5 are used to receive lightning. When a thundercloud approaches, the conical discharge teeth 5 on the surface of the manhole cover 1 preferentially form a strong electric field concentration point, attracting lightning leader discharge. The lightning current enters the mesh lightning conduction layer through the discharge teeth 5. Layer 8, due to the excellent conductivity of the copper mesh, can quickly disperse current. After the lightning current enters the current-conducting layer 8, it is guided into the underground grounding grid through the pre-buried grounding down conductor (not shown, can be added), ensuring the safe discharge of the lightning current. The entire lightning protection process is completed in milliseconds, preventing damage to the manhole cover 1 and surrounding equipment from lightning strikes. The honeycomb support frame 9 provides high rigidity support to ensure that the manhole cover 1 does not deform. At the same time, the lightweight characteristics of the aluminum alloy substrate 4 facilitate installation and maintenance. The combination of the conical discharge teeth 5 and the mesh lightning current-conducting layer 8 with the grounding down conductor enables rapid discharge of lightning current. The honeycomb support frame 9 makes the manhole cover 1 more rigid, and the aluminum alloy substrate 4 facilitates transportation and installation.

[0032] Please refer to the details. Figures 1-3 Both the manhole cover 1 and the outer frame 2 are fixedly connected to triangular mounting brackets 12. The upper ends of the two triangular mounting brackets 12 are provided with circular holes, and bolts 6 are provided in the two circular holes. Two nuts 11 are threadedly connected to the circumference of the bolts 6.

[0033] In this embodiment: the triangular mounting bracket 12 is made of stainless steel or galvanized steel to enhance connection stability. The bolts 6 and nuts 11 ensure the tightness of the manhole cover 1 and the outer frame 2. When installing the manhole cover, align the triangular mounting brackets 12 of the manhole cover 1 and the outer frame 2, insert the bolts 6 and tighten the upper and lower nuts 11 to form a mechanical interlock, which can prevent horizontal displacement.

[0034] Please refer to the details. Figures 1-3 A sealing strip 7 is adhesively connected to the upper end of the outer frame 2, and the sealing strip 7 is attached to the lower end of the manhole cover 1.

[0035] In this embodiment: when rainwater impacts the manhole cover 1, the sealing strip 7 deforms under pressure, filling the gap between the manhole cover 1 and the outer frame 2. This completely prevents water from seeping in and avoids water accumulation in underground facilities.

[0036] Please refer to the details. Figures 1-3 The head of the conical discharge tooth 5 is a flat design.

[0037] In this embodiment, when a lightning leader approaches, the planar head can still form a concentrated electric field, but it is unlikely to cause injury to people during daily use. This balances safety and lightning protection performance.

[0038] Please refer to the details. Figures 1-3 The manhole cover 1 has two reflective strips 3 bonded to its surface by adhesive.

[0039] In this embodiment: reflective strip 3 provides a warning to personnel at night.

[0040] Please refer to the details. Figures 1-3 Three grounding lead frames 10 are fixedly connected to the surface of the manhole cover 1. The grounding lead frames 10 are integrally formed with the manhole cover 1.

[0041] In this embodiment, the down conductor frame 10 and the manhole cover 1 are integrally formed during casting, and the material is aluminum alloy. Copper terminals are pre-embedded inside for connecting the grounding wire. When installing the grounding wire, simply insert the down conductor into the terminal 14 and tighten the bolt. This avoids welding or additional drilling, improves installation efficiency, and ensures continuity of conductivity.

[0042] Please refer to the details. Figures 1-3 The surface of the aluminum alloy substrate 4 has an anodized layer with a thickness of 3-6 μm. The surface is sealed with fluorocarbon resin to form an insulating layer with volume resistance.

[0043] In this embodiment, the oxide layer, with a thickness of 3-6 μm and sealed with fluorocarbon resin, prevents the current from diffusing to the surface of the manhole cover 1 when lightning current is discharged through the current-conducting layer 8. This ensures that there is no risk of electric shock when personnel touch the manhole cover 1, while also protecting the aluminum alloy substrate 4 from electrolytic corrosion.

[0044] All standard parts used in this invention 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 the control unit. The control circuit of the control unit can be implemented by simple programming by those skilled in the art, which is common knowledge in the field. Therefore, the control method and circuit connection will not be explained in detail in this invention.

[0045] 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. An aluminum manhole cover with lightning protection, characterized in that, include: Outer frame (2); Manhole cover (1), the manhole cover (1) is located at the upper end of the outer frame (2); An aluminum alloy substrate (4), a mesh lightning conduction layer (8), and a honeycomb support frame (9) are arranged sequentially from top to bottom inside the manhole cover (1). Multiple conical discharge teeth (5) are fixedly connected to the upper end of the aluminum alloy substrate (4).

2. The aluminum manhole cover with lightning protection according to claim 1, characterized in that: The manhole cover (1) and the outer frame (2) are both fixedly connected with triangular mounting brackets (12). The upper ends of the two triangular mounting brackets (12) are provided with circular holes, and bolts (6) are provided in the two circular holes. Two nuts (11) are threadedly connected to the circumferential surface of the bolts (6).

3. An aluminum manhole cover with lightning protection according to claim 2, characterized in that: The upper end of the outer frame (2) is adhesively connected to a sealing strip (7), which is attached to the lower end of the manhole cover (1).

4. An aluminum manhole cover with lightning protection according to claim 3, characterized in that: The head of the conical discharge tooth (5) is a planar design.

5. An aluminum manhole cover with lightning protection according to claim 4, characterized in that: The manhole cover (1) has two reflective strips (3) attached to its surface by adhesive bonding.

6. An aluminum manhole cover with lightning protection according to claim 5, characterized in that: The surface of the manhole cover (1) is fixedly connected with three grounding down conductors (10), and the grounding down conductors (10) are integrally formed with the manhole cover (1).

7. An aluminum manhole cover with lightning protection according to claim 6, characterized in that: The surface of the aluminum alloy substrate (4) has an anodic oxide layer with a thickness of 3-6 μm, and the surface is sealed with fluorocarbon resin to form an insulating layer with volume resistance.

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