An explosion-proof LED light

Abstract

This utility model discloses an explosion-proof LED lamp, comprising a light source cavity and a power supply cavity. The light source cavity and the power supply cavity are sequentially arranged and fixedly connected along the axial direction. The explosion-proof LED lamp adopts a layout structure where the light source cavity and the power supply cavity are axially separated, with the two functional units being both independent and forming a whole through a reliable connection. This design allows for targeted operation during lamp maintenance. Simultaneously, the heat generated by the light source board of the explosion-proof LED lamp can be effectively dissipated through the cavity wall in close contact with it, helping to maintain the LED chip at a suitable temperature. The connection parts employ a multi-layered sealing design. These measures work together to slow down the entry of external moisture, corrosive gases, or dust into the cavity, thereby improving the lamp's adaptability and service life in harsh industrial environments.

Description

Technical Field

[0001] This utility model relates to the field of industrial lighting equipment technology, specifically to an explosion-proof LED lamp. Background Technology

[0002] In industrial sectors such as petroleum, chemical, mining, and ports, lighting equipment needs to operate under harsh conditions for extended periods, including environments containing explosive gases, combustible dust, and humid and corrosive conditions. These environments place extremely high demands on the safety, sealing, and reliability of lighting fixtures. Traditional explosion-proof lights mostly use metal halide lamps or high-pressure sodium lamps as light sources, which suffer from problems such as high energy consumption, short lifespan, slow start-up, and mercury pollution.

[0003] With the popularization of LED technology, LED explosion-proof lights are gradually becoming mainstream. However, most existing LED explosion-proof lights still have many shortcomings in their structural design. First, in terms of heat dissipation, many products concentrate the LED light source and driver power supply in a single cavity, leading to heat accumulation and severely affecting LED luminous efficiency and lifespan. Second, regarding the sealed explosion-proof structure, common integrated or simply partitioned designs cannot simultaneously meet stringent explosion-proof standards and high-level dust and water resistance standards. Furthermore, existing lights have poor maintainability; when any component, such as the driver power supply or the light source, is damaged, complete disassembly and reassembly are often required, which is cumbersome and affects production efficiency.

[0004] Therefore, the industry urgently needs a new type of explosion-proof LED lighting structure that can achieve efficient heat dissipation, multiple reliable seals, and easy modular maintenance.

[0005] A search revealed a Chinese patent document that discloses a dust-removing explosion-proof LED lamp [Application No.: 202022892590.7, Publication No.: CN213333963U], which includes a lamp body assembly, a dust removal assembly, and a drive mechanism. Although this patent can achieve the purpose of explosion protection, the present invention has more comprehensive and superior features in terms of explosion-proof safety, sealing reliability, intelligence, and heat dissipation design. These are features that the comparative patent does not possess or explicitly address. Utility Model Content

[0006] In view of the problems existing in the prior art, the purpose of this utility model is to provide an explosion-proof LED light.

[0007] An explosion-proof LED light includes a light source cavity and a power supply cavity, characterized in that: the light source cavity and the power supply cavity are arranged sequentially along the axial direction and fixedly connected; the front opening of the light source cavity is sealed by a front window assembly, the front window assembly including a pressure ring and a front window plate pressed by it; a light source plate is provided inside the light source cavity, and a reflector is provided between the light source plate and the front window plate, the reflector being fixed to the inner wall of the light source cavity by multiple pillars; a wire passage hole is provided on the side wall of the power supply cavity, and a power supply component and wiring terminals are housed inside the power supply cavity.

[0008] Preferably, a holding member is provided on the outer wall of the power supply cavity.

[0009] Through the above technical solution, the gripping component is located on the outer wall of the power supply cavity, facilitating manual gripping and handling, and avoiding direct contact with other parts of the lamp body. The gripping position is clearly defined, and the picking action is concentrated at the gripping component, reducing contact with the front window, the edge of the housing, and the cable outlet area; the gripping component is externally installed, does not enter the cavity, and does not change the original structure and assembly relationship of the cavity.

[0010] Specifically, the grip is located on the outer wall of the power supply cavity, and the gripping path does not cover the front window assembly and cable outlet. When picking it up, the hand does not need to touch the glass, pressure ring, or fastening area. The grip is fixed by the outer surface and does not interfere with the internal mounting surfaces of the light source board, power supply assembly, wiring terminals, etc., and does not obstruct the mounting holes and mating surfaces of the housing. During transportation and handling, the operator can directly grasp the component to complete the lifting, placement, and transfer, reducing the pinching and friction on the housing ribs, heat dissipation surface, or transparent parts, thereby reducing repeated contact with these parts.

[0011] Preferably, a sensing module is provided inside the light source cavity, and a controller is provided inside the power supply cavity and electrically connected to the power supply component and the sensing module.

[0012] Through the above technical solution, this arrangement allows the sensing and control units to be close to their corresponding functional parts, resulting in shorter and more concentrated signal and power supply lines, no increase in exposed wiring and additional holes, and easier assurance of housing integrity and assembly consistency.

[0013] Specifically, the sensing module is located inside the light source cavity, with the signal acquisition position close to the light source board. The wiring is completed within the light source cavity, and the leads do not pass through the front window area or the outer surface. The controller is located inside the power supply cavity, close to the power supply components and terminals. Electrical connections are completed through existing pathways within the cavity. Power lines and signal lines are laid in separate cavities, without interference. Only necessary wiring paths are maintained between the two cavities; no new external openings are added, and the original structural relationship between the front window component and the mating surfaces of the two cavities is not altered. When maintenance is required, the corresponding cavity can be opened separately for positioning and replacement, reducing the need for operation on the other cavity.

[0014] Preferably, the support pillars are distributed along the periphery of the reflector and are connected to the inner wall of the light source cavity.

[0015] Through the above technical solutions, the reflector obtains uniform circumferential support and positioning, and its position is stable after assembly, making it less prone to displacement or warping; the relative distance between the light source board and the reflector is easier to keep consistent, and the support column does not enter the effective light transmission area of ​​the front opening, thus avoiding interference with the front window assembly.

[0016] Specifically, the support pillars are distributed along the periphery of the reflector, with one end of the pillar contacting the reflector and the other end connecting to the inner wall of the light source cavity, forming multi-point support and multi-point positioning. The circumferentially distributed support pillars simultaneously constrain the radial and axial positions of the reflector, limiting the rotation and movement of the reflector within the cavity. The support pillars are arranged around the periphery, avoiding the light transmission area and the line-out area, so that the installation space between the front window panel and the pressure ring remains continuous, and the interrelationship between the components is clear.

[0017] Preferably, an insulating sheet is provided between the power supply assembly and the inner wall of the power supply cavity.

[0018] The above technical solutions ensure the electrical safety and operational reliability of the power supply components in explosion-proof environments. This design, which incorporates an insulating sheet between the power supply component and the inner wall of the power supply cavity, effectively prevents the cavity from becoming electrified due to short circuits or leakage in the components, fundamentally improving the product's safety performance.

[0019] Specifically, this insulation design completely blocks potential leakage current paths by establishing a reliable insulating barrier between the metal casing of the power supply component and the power supply cavity. This insulation protection ensures that even if abnormal discharge or insulation breakdown occurs inside the power supply, it will not cause the cavity to become energized, thus preventing the risk of spark leakage and meeting the safety standards for explosion-proof electrical equipment. Furthermore, this design avoids electrolytic corrosion problems caused by direct contact between the power supply component and the metal cavity, extending the product's service life.

[0020] Preferably, a heat-conducting medium is provided at the contact point between the light source plate and the inner wall of the light source cavity.

[0021] The above technical solution enables efficient heat dissipation and stable operation of LED lamps. This design, which places a heat-conducting medium at the interface between the light source board and the inner wall of the light source cavity, ensures that the heat generated by the LED chip is quickly conducted to the entire light source cavity, thereby effectively reducing the chip junction temperature and extending the lamp's lifespan.

[0022] Specifically, this thermally conductive medium filling design eliminates thermal resistance caused by air gaps due to surface unevenness by establishing a complete heat conduction path between the light source board and the inner wall of the light source cavity. This tight thermal connection ensures that heat can quickly diffuse from the LED chip to the light source cavity with its large surface area, and then dissipate to the surrounding environment through the heat dissipation structure on the cavity surface. Furthermore, this design prevents heat from accumulating locally and avoids the formation of hot spots, thereby maintaining the luminous efficacy and color stability of the LED light source.

[0023] Preferably, a protective coil is provided at the wire passage hole, and the wire passage hole can be filled with epoxy resin.

[0024] The above technical solution enables sealed protection at the cable passage, ensuring the long-term reliability of explosion-proof LED lights in harsh environments. This double-sealing design, which involves setting a protective coil at the cable passage and encapsulating it with epoxy resin, not only prevents cable damage from pulling but also forms a permanent airtight protection, effectively blocking the intrusion of external flammable gases, corrosive media, and dust.

[0025] Specifically, this dual-sealing structure provides the first layer of mechanical protection through the coil guard, effectively mitigating the impact of external stress on the internal conductors and preventing cable sheath abrasion. The epoxy resin potting forms the second layer of chemical protection, completely filling all microscopic gaps between the coil guard and the cable, as well as the cable hole walls, creating a sealed barrier. This design ensures that the sealing performance remains stable even when the casing is subjected to vibration or temperature changes, while preventing the formation of any paths that could propagate an explosion.

[0026] Compared with the prior art, the present invention has the following advantages: 1. This explosion-proof LED light adopts an axially separated layout for the light source cavity and power supply cavity. The two functional units are independent yet reliably connected to form a unified whole. This design allows for targeted maintenance; when replacing the light source or cleaning optical components, only the light source cavity needs to be addressed, without involving electrical components such as power wiring. Similarly, when overhauling the power module, it is unnecessary to disassemble the front-end optical components, thus reducing the complexity of maintenance work and minimizing the possibility of component damage or seal failure due to improper operation, contributing to the long-term stability of the light fixture.

[0027] 2. The heat generated by the explosion-proof LED light source board can be effectively dissipated through the cavity wall in close contact with it, which helps to maintain the LED chip at a suitable temperature. The connection parts adopt a multi-layer sealing design. These measures work together to slow down the process of external moisture, corrosive gases or dust entering the cavity, thereby improving the adaptability and service life of the lamp in harsh industrial environments. Attached Figure Description

[0028] Figure 1 This is a top view schematic diagram of the present invention; Figure 2 This is a schematic diagram of the AA cross-section of this utility model.

[0029] In the diagram: 1. Light source cavity; 2. Power supply cavity; 31. Pressure ring; 32. Front window panel; 33. Reflector; 34. Support column; 4. Light source board; 5. Power supply assembly; 6. Wiring terminal; 7. Wiring hole; 12. Sensing module; 13. Controller. Detailed Implementation

[0030] 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.

[0031] Please see Figures 1 to 2 This utility model provides a technical solution: An explosion-proof LED light includes a light source cavity 1 and a power supply cavity 2, characterized in that: the light source cavity 1 and the power supply cavity 2 are arranged sequentially along the axial direction and fixedly connected; the front opening of the light source cavity 1 is sealed by a front window assembly, the front window assembly including a pressure ring 31 and a front window plate 32 pressed by it; a light source plate 4 is provided inside the light source cavity 1, and a reflector 33 is provided between the light source plate 4 and the front window plate 32, the reflector 33 being fixed to the inner wall of the light source cavity 1 by multiple support pillars 34; the side wall of the power supply cavity 2 is provided with a wire hole 7, and a power supply assembly 5 and a terminal block 6 are housed inside the power supply cavity 2.

[0032] Specifically, a gripping component is provided on the outer wall of the power supply cavity 2. The gripping component is located on the outer wall of the power supply cavity 2, which facilitates manual gripping and handling, and avoids direct contact with other parts of the lamp body. The gripping position is clear, and the picking action is concentrated on the gripping component, reducing contact with the front window, the edge of the housing, and the wiring area; the gripping component is externally installed, does not enter the cavity, and does not change the original structure and assembly relationship of the cavity.

[0033] Specifically, the grip is located on the outer wall of the power supply cavity 2, and the gripping path does not cover the front window assembly and cable outlet. When picking it up, the hand does not need to touch the glass, pressure ring 31, or fastening area. The grip is fixed by the outer surface and does not interfere with the internal mounting surfaces of the light source board 4, power supply assembly 5, wiring terminals 6, etc., and does not block the mounting holes and mating surfaces of the housing. During transportation and handling, the operator can directly grasp the component to complete the lifting, placement, and transfer, reducing the pinching and friction on the housing ribs, heat dissipation surface, or transparent parts, thereby reducing repeated contact with these parts.

[0034] In practical applications, the external grip is suitable for common installation postures such as top mounting, wall mounting, and bracket mounting. It can be directly lifted while wearing gloves and aligned and fixed with the other hand. During maintenance and disassembly, the grip can be used as a holding point to remove and place the device, avoiding hand contact with the front window panel 32, pressure ring 31, and cable area. This external arrangement is independent of the internal structure of the cavity, does not change the original assembly sequence and wiring harness routing, does not occupy internal space, and does not affect the connection relationship between the light source cavity 1 and the power supply cavity 2, maintaining the consistency of the overall structural design.

[0035] Specifically, a sensing module 12 is provided inside the light source cavity 1, and a controller 13 is provided inside the power supply cavity 2 and is electrically connected to the power supply component 5 and the sensing module 12. This arrangement allows the sensing and control units to be close to their corresponding functional parts, resulting in shorter and more concentrated signal and power supply lines, no increase in exposed wiring and additional holes, and easier assurance of housing integrity and assembly consistency.

[0036] Specifically, the sensing module 12 is located inside the light source cavity 1, with the signal acquisition position close to the light source board 4. The wiring is completed within the light source cavity 1, and the leads do not pass through the front window area or the outer surface. The controller 13 is located inside the power supply cavity 2, close to the power supply component 5 and the terminal block 6. The electrical connection is completed through the existing pathways inside the cavity. The power lines and signal lines are laid in separate cavities and do not interfere with each other. Only necessary wiring paths are retained between the two cavities, without adding any external openings or changing the original structural relationship between the front window component and the mating surfaces of the two cavities. When maintenance is required, the corresponding cavity can be opened separately for positioning and replacement, reducing the operation of the other cavity.

[0037] In practical applications, this modular design facilitates batch assembly and subsequent maintenance: Replacing the light source board 4 or the front window assembly on the light source side does not touch the controller 13; replacing the power supply assembly 5 or tidying up the wiring on the power supply side does not touch the sensing module 12; the wire harness length is controllable, the binding and fixing points are clearly defined, and the assembly process can be standardized; there are no additional external boxes or jumpers, resulting in a clean exterior surface and avoiding additional space occupation. Overall, the built-in modular layout facilitates handling, wiring, and maintenance without altering the original structural design.

[0038] Specifically, the support column 34 is distributed along the periphery of the reflector 33 and is connected to the inner wall of the light source cavity 1. The reflector 33 obtains uniform circumferential support and positioning, and its position is stable after assembly, making it less prone to displacement or warping. The relative distance between the light source plate 4 and the reflector 33 is easier to keep consistent, and the support column 34 does not enter the effective light transmission area of ​​the front opening, avoiding interference with the front window assembly.

[0039] Specifically, the support pillars 34 are distributed around the periphery of the reflector 33. One end of the support pillar 34 contacts the reflector 33, and the other end connects to the inner wall of the light source cavity 1, forming multi-point support and multi-point positioning. The circumferentially distributed support pillars 34 simultaneously constrain the radial and axial positions of the reflector 33, limiting the rotation and movement of the reflector 33 within the cavity. The support pillars 34 are arranged around the periphery, avoiding the light transmission area and the line-out area, so that the installation space between the front window panel 32 and the pressure ring 31 remains continuous, and the relationship between the components is clear.

[0040] In practical applications, this peripheral support method facilitates the disassembly and replacement of the front-end components: during disassembly and assembly, only the front window assembly and the reflector 33 body need to be handled, without touching the power supply cavity 2 and the internal wiring area; the reflector 33 is positioned by multiple support pillars 34, and vibrations during transportation and handling are unlikely to cause positional changes; the assembly sequence is clear: first, position the support pillars 34 on the inner wall of the light source cavity 1, then mate the reflector 33 with the end of the support pillars 34, and finally install the front window panel 32 and the pressure ring 31 to complete the fixation of the front-end components. The overall structural relationship remains unchanged, reducing contact and impact on other components.

[0041] Specifically, an insulating sheet is installed between the power supply component 5 and the inner wall of the power supply cavity 2 to ensure the electrical safety and operational reliability of the power supply component 5 in an explosion-proof environment. This design of installing an insulating sheet between the power supply component 5 and the inner wall of the power supply cavity 2 can effectively prevent the risk of the cavity becoming electrified due to short circuits or leakage of components, fundamentally improving the safety performance of the product.

[0042] Specifically, this insulation design completely blocks potential leakage current paths by establishing a reliable insulation barrier between the metal casing of the power supply component 5 and the power supply cavity 2. This insulation protection ensures that even if abnormal discharge or insulation breakdown occurs inside the power supply, it will not cause the cavity to become energized, thus preventing the risk of spark leakage and meeting the safety standards for explosion-proof electrical equipment. Furthermore, this design avoids electrolytic corrosion problems caused by direct contact between the power supply component 5 and the metal cavity, extending the product's service life.

[0043] In practical applications, this insulation protection design better meets the special safety requirements of explosion-proof LED lighting fixtures in flammable and explosive environments. Especially in hazardous locations such as chemical plants and oil and gas plants where explosive gases are present, it effectively prevents safety accidents caused by electrical faults, providing reliable safety assurance for industrial production. This design is crucial for ensuring the safe operation of explosion-proof electrical equipment in extreme environments.

[0044] Specifically, a heat-conducting medium is provided at the interface between the light source board 4 and the inner wall of the light source cavity 1, which enables efficient heat dissipation and stable operation of the LED lamp. This design, which uses a heat-conducting medium at the interface between the light source board 4 and the inner wall of the light source cavity 1, ensures that the heat generated by the LED chip is quickly conducted to the entire light source cavity 1, thereby effectively reducing the chip junction temperature and extending the lifespan of the lamp.

[0045] Specifically, this thermally conductive medium filling design eliminates thermal resistance caused by air gaps due to surface unevenness by establishing a complete heat conduction path between the light source plate 4 and the inner wall of the light source cavity 1. This tight thermal connection ensures that heat can be rapidly diffused from the LED chip to the light source cavity 1, which has a large surface area, and then dissipated to the surrounding environment through the heat dissipation structure on the cavity surface. In addition, this design can also prevent heat from accumulating locally and prevent the formation of high-temperature hotspots, thereby maintaining the luminous efficacy and color stability of the LED light source.

[0046] In practical applications, this efficient heat dissipation design better meets the needs of explosion-proof LED lighting fixtures for long-term continuous operation in enclosed environments, especially in high-temperature industrial sites. It ensures that the LED light source always operates within a suitable temperature range, thereby maintaining luminous efficacy and extending service life. This design is of great significance for ensuring the reliability and durability of explosion-proof lighting fixtures in harsh industrial environments.

[0047] Specifically, a protective coil is installed at the cable passage hole 7, and epoxy resin can be filled into the cable passage hole 7 to achieve a sealed protection at the cable passage hole 7, ensuring the long-term reliability of the explosion-proof LED lighting fixture in harsh environments. This double-sealing design, with a protective coil at the cable passage hole 7 and epoxy resin filling, not only prevents cable damage due to pulling, but also forms a permanent airtight protection, effectively blocking the intrusion of external flammable gases, corrosive media, and dust.

[0048] Specifically, this dual-sealing structure provides the first layer of mechanical protection through the coil guard, effectively mitigating the impact of external stress on the internal conductors and preventing cable sheath abrasion. The epoxy resin potting forms the second layer of chemical protection, completely filling all microscopic gaps between the coil guard and the cable, as well as the walls of the cable passage, creating a sealed barrier. This design ensures that the sealing performance remains stable even when the casing is subjected to vibration or temperature changes, while preventing the formation of any paths that could propagate an explosion.

[0049] In practical applications, this 7-hole sealing solution better meets the installation requirements of explosion-proof lighting fixtures in extreme environments such as chemical and oil and gas extraction. Especially in hazardous locations with flammable gases and corrosive media, it effectively prevents safety hazards caused by seal failure, ensuring the long-term reliability of explosion-proof performance. This design is crucial for ensuring the safe operation of explosion-proof electrical equipment throughout its entire lifecycle.

[0050] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component 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.

[0051] Furthermore, 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 technical features indicated. 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 plurality of" means two or more, unless otherwise explicitly specified.

[0052] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An explosion-proof LED lamp comprising a light source cavity (1) and a power supply cavity (2), characterized in that: The light source cavity (1) and the power supply cavity (2) are arranged and fixedly connected in sequence along the axial direction; the front opening of the light source cavity (1) is sealed by a front window assembly, which includes a pressure ring (31) and a front window plate (32) pressed by it; a light source plate (4) is provided inside the light source cavity (1), and a reflector plate (33) is provided between the light source plate (4) and the front window plate (32), and the reflector plate (33) is fixed to the inner wall of the light source cavity (1) by multiple support columns (34); the side wall of the power supply cavity (2) is provided with a wire hole (7), and the power supply cavity (2) contains a power supply assembly (5) and a wiring terminal (6).

2. The LED lamp of claim 1, wherein: A holding member is provided on the outer wall of the power supply cavity (2).

3. The LED lamp of claim 1, wherein: The light source cavity (1) is equipped with a sensing module, and the power supply cavity (2) is equipped with a controller and is electrically connected to the power supply component (5) and the sensing module (12).

4. The LED lamp according to claim 1, characterized in that: The support column (34) is distributed along the periphery of the reflector (33) and is connected to the inner wall of the light source cavity (1).

5. The LED lamp according to claim 1, characterized in that: An insulating sheet is provided between the power supply assembly (5) and the inner wall of the power supply cavity (2).

6. The LED lamp according to claim 1, characterized in that: A heat-conducting medium is provided at the contact point between the light source plate (4) and the inner wall of the light source cavity (1).

7. The LED lamp according to claim 1, characterized in that: A protective coil is provided at the wire hole (7), and epoxy resin can be filled into the wire hole (7).

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