An anti-arc surface shield

Abstract

This invention provides an arc-resistant face shield, comprising a cap and face shields hinged to its two sides, with the cap connected to symmetrical chin straps. Conductive wires are radially distributed on the face shield surface, and an insulating layer is provided at the edges. The conductive wires pass through the insulating layer and are detachably grounded via leads. The radial conductive wires and the transition wires within the insulating layer form a conductive mesh, rapidly dispersing energy during arc impact and preventing the face shield from melting through. The density of conductive wires at the edges is higher than in the central area. The surface of the conductive wires is covered with a 0.01–0.03 μm polyimide coating to prevent oxidation and improve high-temperature resistance. The leads, via plugs and detachable fixing cylinders and their components, enable quick assembly and disassembly, improving maintenance efficiency. When subjected to the same arc flash, only half the thickness of a face shield of the same material is required to achieve the same protection standard.

Description

Technical Field

[0001] This utility model relates to the field of protective clothing technology, specifically to an anti-arc surface shield. Background Technology

[0002] An arc flash shield is a type of personal protective equipment specifically designed for power work scenarios. It primarily covers the face and neck area of ​​the worker, protecting against electric arc flashes and high-temperature debris caused by short circuits, equipment malfunctions, etc., through physical isolation or energy absorption. It is usually used in conjunction with an arc flash suit to further protect the overall safety of the worker.

[0003] To maintain a clear field of vision and prevent any impact on operational flexibility, existing anti-arc face shields generally use transparent polymer materials or composite transparent structures as the core protective layer. The main transparent materials are polycarbonate (PC), polyimide (PI), or tempered glass. They often feature an arc-shaped surface that fits the face, with the two sides of the arc-shaped surface hinged or rotated to the cap body. The cap body is then worn stably on the head via an adjustment strap. When in use, the arc-shaped surface is rotated to face the face.

[0004] However, high-protection face shields often require increased thickness, which leads to decreased light transmittance or increased weight, making them inconvenient to wear. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an anti-arc screen that can absorb and transfer energy when exposed to electric arc flashes, making the screen lighter.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows: an anti-arc face shield, comprising a cap body and a face shield hinged to both sides of the cap body, one side of the cap body being connected to one end of a chin strap, the other end of the chin strap being symmetrically disposed on the other side of the cap body, conductive wires being radially arranged on the side of the face shield away from the cap body, an insulating layer being disposed at the edge of the face shield, the conductive wires passing through the insulating layer being connected to one end of a lead wire, and the other end of the lead wire being detachably connected to a ground wire.

[0007] To simplify lead wire maintenance, the extended insulation layer ensures that the connection point is isolated from the external environment, preventing leakage or short circuits during arc discharge. As a preferred embodiment, the lead wire and conductive wire are detachably connected via a plug and socket, with the insulation layer extending towards the connection point.

[0008] To enable a quick and detachable connection between the lead wire and the ground wire, ensuring timely transfer of arc energy to the ground and improving ease of use, a preferred technical solution is to provide an alligator clip at the end of the lead wire furthest from the conductive wire.

[0009] To ensure conductivity while optimizing screen transmittance, and to avoid excessively thick conductive wires obstructing vision or increasing weight, a preferred technical solution is to use copper wire with a diameter of 0.08-0.15 mm.

[0010] In order to isolate the oxidizing medium and enhance the high-temperature stability of the conductive wire, as a preferred technical solution, the conductive wire is embedded in the outer side of the screen, and the surface of the conductive wire is provided with a polyimide coating with a thickness of 0.01-0.03μm.

[0011] To optimize the energy conduction path and reduce the risk of melt-through in the central region through a high-density conductive mesh at the edges, a preferred technical solution is to have a lower density of conductive wires at the center of the screen than at the edges.

[0012] To prevent electric arc from breaking down along the edge of the screen, a preferred technical solution is to provide a transition wire within the insulating layer, which is attached to the outer periphery of the screen and disposed within the insulating layer.

[0013] To improve the stability of the electrical connection and prevent the lead wire from coming loose due to vibration, as a preferred technical solution, a fixing cylinder adapted to the diameter of the lead wire is also provided between the plug and the socket. One end of the fixing cylinder is threaded into the outer periphery of the socket, and the plug is secured inside the fixing cylinder.

[0014] To facilitate quick disassembly and replacement of damaged parts, avoid complete scrapping, improve maintenance efficiency, and reduce wear and tear costs, the preferred technical solution is that the fixing cylinder is axially detachably divided into at least two components.

[0015] As a preferred technical solution, the connection method of the at least two components includes at least one of positioning steps, snap fasteners, and connecting posts.

[0016] The advantages and beneficial effects of this invention are as follows: A conductive mesh is formed by the radially distributed conductive wires and transition wires on the surface of the shield, which can quickly capture energy during arc impact, preventing localized heat accumulation that could lead to shield melting. The density of conductive wires at the edges is higher than in the central area, which aligns with the physical characteristic of arc flash energy diffusing outwards from the center, optimizing the energy conduction path. Simultaneously, the finer conductive wires and their differentiated density maintain a good operating field of vision. When subjected to the same arc flash, only half the thickness of a shield of the same material is required to achieve the same protection standard. The conductive wire surface is coated with a polyimide coating, which combines insulation and high-temperature resistance, preventing oxidation and failure of the conductive wires and extending their service life. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a disassembly diagram of the fixing cylinder of this utility model;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the front panel of this utility model;

[0020] Figure label:

[0021] 1-Cap body, 2-Face shield, 3-Jaw strap, 4-Conductive wire, 5-Insulation layer, 6-Lead wire, 7-Plug, 8-Socket, 9-Alligator clip, 10-Polyimide coating, 11-Transition wire, 12-Fixing cylinder, 13-Component, 14-Positioning step. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0023] Example 1

[0024] Please see Figures 1-3 This embodiment provides an arc-proof face shield, including a cap body 1 and face shields 2 hinged to both sides of the cap body 1. One side of the cap body 1 is connected to one end of a chin strap 3, and the other end of the chin strap 3 is symmetrically arranged on the other side of the cap body 1 for stable wearing and to distribute the weight of the face shield. The side of the face shield 2 away from the cap body 1 has a radially arranged conductive wire 4 with a diameter of 0.08 mm. The surface of the conductive wire 4 is coated with a polyimide coating 10 with a thickness of 0.03 μm. The radial layout optimizes the arc energy diffusion path. An insulating layer 5 is provided at the edge of the face shield 2. A transition wire 11 is embedded in the insulating layer 5. The transition wire 11 fits the outer periphery of the face shield 2 and is arranged in the insulating layer 5, forming a conductive mesh with the conductive wire 4 to enhance energy capture efficiency. The conductive wire 4 passes through the insulating layer 5 and is connected to one end of a lead wire 6 to form a grounding path to quickly transfer arc energy. The other end of the lead wire 6 is detachably connected to a ground wire through an alligator clip 9 to achieve portable grounding and facilitate maintenance and replacement.

[0025] Example 2

[0026] Based on Example 1, the conductive wire 4 has a diameter of 0.15 mm and a polyimide coating 10 with a thickness of 0.01 μm on its surface. The lead wire 6 is detachably connected to the conductive wire 4 via a plug 7 and a socket 8. The insulating layer 5 extends to the connection between the plug 7 and the socket 8. The other end of the lead wire 6 is detachably connected to the ground wire via a bolt. A fixing cylinder 12 adapted to the diameter of the lead wire 6 is also provided between the plug 7 and the socket 8. One end of the fixing cylinder 12 is threaded into the outer periphery of the socket 8, and the plug 7 is snapped into the inner side of the fixing cylinder 12. The fixing cylinder 12 is detachably divided into at least two components 13 along the axial direction. The connection method of the at least two components 13 includes at least one of the following: a positioning step 14, a snap-fit, and a connecting post.

[0027] Example 3

[0028] An arc-proof face shield includes a cap body 1 and face shields 2 hinged to both sides of the cap body 1. One side of the cap body 1 is connected to one end of a chin strap 3, and the other end of the chin strap 3 is symmetrically arranged on the other side of the cap body 1. Conductive wires 4 are radially arranged on the side of the face shield 2 away from the cap body 1, and an insulating layer 5 is provided on the edge of the face shield 2. A transition wire 11 is provided inside the insulating layer 5, and the transition wire 11 is attached to the outer periphery of the face shield and disposed within the insulating layer 5. The conductive wires 4 are copper wires with a diameter of 0.12 mm. The conductive wires 4 are embedded in the outer surface of the face shield 2, and the surface of the conductive wires 4 is provided with a polyimide coating 10 with a thickness of 0.03 μm. The conductive wires 4 pass through the insulating layer 5 and are connected to one end of a lead wire 6. The other end of the lead wire 6 is provided with an alligator clip 9 for detachable connection to a ground wire.

[0029] The working principle of this invention is that when an electric arc occurs, the high-temperature energy first impacts the central area of ​​the shield. The conductive wires 4 are radially distributed, forming a conductive network together with the transition wires 11 in the insulating layer 5 to quickly absorb the arc energy and transfer it to the ground, avoiding local heat accumulation. After the energy is evenly distributed, only half the thickness of the shield of the same material is required under the same protection standard, thus achieving a lightweight design. The conductive wires 4 are made of copper wire with a diameter of 0.08mm and are covered with a polyimide coating 10, which has both insulation and high-temperature resistance, preventing oxidation and failure of the conductive wires and ensuring long-term stable operation in high-frequency arc environments. The lead wires 6 can be quickly assembled and disassembled through the plug 7, socket 8, and fixing cylinder 12, which facilitates stable fixing and adaptation to lead wires of different lengths.

[0030] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An anti-arc face shield, comprising a cap body (1) and face shields (2) hinged to both sides of the cap body (1), wherein one side of the cap body (1) is connected to one end of a chin strap (3), and the other end of the chin strap (3) is symmetrically disposed on the other side of the cap body (1); characterized in that, The face shield (2) has a conductive wire (4) arranged radially on the side away from the cap body (1), and an insulating layer (5) is provided on the edge of the face shield (2); the conductive wire (4) passes through the insulating layer (5) and is connected to one end of the lead wire (6), and the other end of the lead wire (6) is detachably connected to the ground wire.

2. The anti-arcing faceplate of claim 1, wherein, The lead wire (6) and the conductive wire (4) are detachably connected via a plug (7) and a socket (8); the insulating layer (5) extends to the connection between the plug (7) and the socket (8).

3. The anti-arcing faceplate of claim 1, wherein, The lead wire (6) is provided with an alligator clip (9) at the end away from the conductive wire (4).

4. The anti-arcing faceplate of claim 1, wherein, The conductive wire (4) is a copper wire with a diameter of 0.08-0.15 mm.

5. The anti-arcing faceplate of claim 1, wherein, The conductive wire (4) is embedded in the outer side of the faceplate (2), and the surface of the conductive wire (4) is provided with a polyimide coating (10) with a thickness of 0.01-0.03μm.

6. The anti-arc shield according to claim 1, characterized in that, The density of the conductive wire (4) located at the center of the screen (2) is less than the density of the conductive wire (4) at the edge of the screen (2).

7. The anti-arcing faceplate of claim 1, wherein, A transition wire (11) is provided inside the insulating layer (5). The transition wire (11) is attached to the outer periphery of the faceplate (2) and is provided inside the insulating layer (5).

8. The anti-arcing faceplate of claim 2, wherein, A fixing cylinder (12) adapted to the diameter of the lead wire (6) is also provided between the plug (7) and the socket (8); one end of the fixing cylinder (12) is threaded to the outer periphery of the socket (8), and the plug (7) is locked inside the fixing cylinder (12).

9. The anti-arcing faceplate of claim 8, wherein, The fixed cylinder (12) is axially detachable and divided into at least two components (13).

10. The anti-tracking faceplate of claim 9, wherein, The connection method of the at least two components (13) includes at least one of positioning step (14), buckle, and connecting post.

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