Dust-free explosion-proof lighting lamp

Abstract

The utility model relates to a dust-accumulation-free explosion-proof lighting lamp technical field especially relates to a dust-accumulation-free explosion-proof lighting lamp, include: casing, one side sets up lighting cavity, the other side sets up installation cavity, and the outer wall sets up the uniform interval's convex block around the circumference, lamp plate is installed in the lighting cavity, and the luminous surface is towards the casing outside, the protection cover subassembly is installed in the casing corresponding lighting cavity's one side, and is fixedly connected with the casing through the convex block, the power is installed in the installation cavity, and is conducted with the lamp plate, the cover plate is installed in the casing corresponding installation cavity's one side, and is fixedly connected with the casing through the convex block, and the cover plate is equipped with the connecting hole one side away from the casing, the cross section of casing along the length direction gradually increases from the one end close to the cover plate to the one end close to the protection cover subassembly, and the casing outer wall is smooth and continuous curved surface, the utility model discloses the convex block of casing setting strengthens the connecting strength between different structures to improve the explosion -proof effect of the lamp, adopts the smooth and continuous casing surface without big fall angle, reaches the effect of reducing the dust accumulation.

Description

Technical Field

[0001] This utility model relates to the technical field of dust-free explosion-proof lighting fixtures, and in particular to a dust-free explosion-proof lighting fixture. Background Technology

[0002] As a core piece of equipment in the field of industrial safety, explosion-proof lighting fixtures have a development history closely related to the production needs in flammable and explosive environments. They are widely used in high-risk fields such as petrochemical, coal mine, port oil depot, offshore oil platform, pharmaceutical and chemical, and semiconductor cleanrooms. In these scenarios, lighting fixtures not only need to meet the basic requirements of isolating electric arcs and sparks from causing explosions, but also need to cope with complex environmental conditions such as high dust concentration, large temperature and humidity fluctuations, and strong corrosiveness.

[0003] In related technologies, the surface of the lamp housing is flat or has a regular geometric shape, and dust easily adheres to the corners. After long-term use, a dust layer is formed, which not only reduces the heat dissipation efficiency of the lamp, but may also cause short circuits or local high temperatures due to changes in the conductivity of the dust, increasing the risk of explosion. Furthermore, the explosion-proof surfaces or seals of explosion-proof lamps are mostly designed for a single function, making it difficult to meet the requirements of explosion-proof isolation and dust barrier. Especially in high-dust environments, the explosion-proof performance is prone to decline due to seal failure.

[0004] Therefore, a new type of lighting fixture is needed that combines explosion-proof performance with dust-free characteristics. Utility Model Content

[0005] In view of at least one of the above technical problems, the present invention provides a dust-free explosion-proof lighting fixture, which adopts a shell structure with a gradient cross section and a smooth continuous curved surface, combined with a protective cover assembly and a cover plate fixed by protrusion blocks, and seals the cavity through an explosion-proof surface to reduce dust adhesion and improve the explosion-proof isolation effect.

[0006] This utility model provides a dust-free explosion-proof lighting fixture, including: The housing has a lighting cavity on one side and a mounting cavity on the other side, and the outer wall of the housing is provided with evenly spaced protrusions around the circumference; A lamp panel is installed inside the lighting cavity, with the light-emitting surface of the lamp panel facing the outside of the housing. A protective cover assembly is installed on the side of the housing corresponding to the lighting cavity, and is fixedly connected to the housing via the protrusion; A power supply is installed inside the mounting cavity and is connected to the lamp panel. A cover plate is installed on the side of the housing corresponding to the mounting cavity, and is fixedly connected to the housing through the protrusion. A connection hole is opened on the side of the cover plate away from the housing. The cross-sectional area of ​​the shell along its length gradually increases from the end near the cover plate to the end near the protective cover assembly, and the outer wall of the shell has a smooth, continuous curved surface.

[0007] In some embodiments of this utility model, the protective cover assembly includes a pressure ring fixedly connected to the protrusion and a glass cover fixedly connected to the pressure ring.

[0008] In some embodiments of this utility model, a light-transmitting hole is provided at the center of the pressure ring, and a fixing strip extends from the end of the pressure ring away from the housing toward the center.

[0009] In some embodiments of this utility model, the edge of the glass cover is fixedly connected to the fixing strip, and the light-emitting surface of the lamp board is opposite to the glass cover.

[0010] In some embodiments of this utility model, a first explosion-proof surface is provided on the side of the pressure ring near the housing, and the first explosion-proof surface abuts against the inner wall of the lighting cavity.

[0011] In some embodiments of this utility model, a second explosion-proof surface is provided on the side of the cover plate near the housing, and the second explosion-proof surface abuts against the inner wall of the mounting cavity.

[0012] In some embodiments of this utility model, a heat dissipation component is provided inside the illumination cavity.

[0013] In some embodiments of this utility model, the heat dissipation component includes a heat dissipation groove formed in the lighting cavity and heat dissipation ribs evenly spaced in the heat dissipation groove.

[0014] In some embodiments of this utility model, a plurality of spaced adapter frames are provided on the outer wall of the housing.

[0015] In some embodiments of this utility model, a connecting component is provided in the connecting hole, including a rubber plug abutting against the bottom of the connecting hole, a retaining ring abutting against the rubber plug, and a clamping nut abutting against the retaining ring.

[0016] The beneficial effects of this utility model are as follows: This utility model achieves the purpose of reducing dust adhesion through the shell structure of the gradually changing cross section and smooth continuous curved surface, effectively avoiding heat dissipation failure and local high temperature risk caused by dust accumulation, thereby improving the long-term stability of the lamp in a high dust environment; by setting the fixed connection structure of the protrusion block with the protective cover assembly and cover plate, the structural strength of the shell and external parts is enhanced, and in conjunction with the explosion-proof surface set inside the shell, the explosion-proof effect is effectively improved, the explosion risk is reduced, and the safety of using the lamp is improved. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the dust-free explosion-proof lighting fixture in the embodiment of this utility model; Figure 2 This is a top view of the dust-free explosion-proof lighting fixture in this embodiment of the present invention; Figure 3 for Figure 2 Sectional view at point AA; Figure 4 This is a top view of the protective cover assembly in an embodiment of the present utility model; Figure 5 for Figure 4 Sectional view at point BB; Figure 6 This is a schematic diagram of the structure of the housing illumination cavity in an embodiment of this utility model; Figure 7 This is a schematic diagram of the connecting component in an embodiment of the present utility model.

[0019] Reference numerals: 1. Housing; 11. Illumination cavity; 11a. Heat dissipation assembly; 11a1. Heat dissipation groove; 11a2. Heat dissipation rib; 12. Mounting cavity; 13. Protrusion; 14. Adapter frame; 2. Lamp panel; 3. Protective cover assembly; 31. Pressure ring; 31a. Light transmission hole; 31b. Fixing strip; 31c. First explosion-proof surface; 32. Glass cover; 4. Power supply; 5. Cover plate; 51. Connection hole; 52. Second explosion-proof surface; 53. Connection assembly; 53a. Plug; 53b. Retaining ring; 53c. Compression nut. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] This utility model provides, for example Figures 1 to 7 The dust-free explosion-proof lighting fixtures shown include: The housing 1 has an illumination cavity 11 on one side and an installation cavity 12 on the other side. The outer wall of the housing 1 is provided with evenly spaced protrusions 13 around the circumference. The lamp panel 2 is installed inside the lighting cavity 11, with the light-emitting surface of the lamp panel 2 facing the outside of the housing 1; The protective cover assembly 3 is installed on the side of the housing 1 corresponding to the lighting cavity 11, and is fixedly connected to the housing 1 by the protrusion 13; The power supply 4 is installed in the mounting cavity 12. Preferably, a wire hole is opened on the common surface of the lighting cavity 11 and the mounting cavity 12 to facilitate the power supply 4 to conduct to the lamp board 2 through the wire hole. Epoxy resin is used to seal and isolate the wire hole. The sealant needs to reach the preset qualified thickness to reduce the additional safety risks caused by the setting of the wire hole. The cover plate 5 is installed on the side of the housing 1 corresponding to the mounting cavity 12, and is fixedly connected to the housing 1 by the protrusion 13. The side of the cover plate 5 away from the housing 1 has a connection hole 51. The cross-sectional area of ​​the housing 1 along its length gradually increases from the end near the cover plate 5 to the end near the protective cover assembly 3, and the outer wall of the housing 1 is a smooth and continuous curved surface, forming an outer surface without sharp edges, which greatly reduces the dust accumulation effect compared to a surface with sharp edges.

[0024] The housing 1 is made of metal alloy casting to enhance its explosion-proof performance. The surface of the housing 1 can be treated with a nano-hydrophobic coating, such as a fluorosilane coating, combined with a smooth, continuous curved outer wall to reduce dust adhesion and avoid the risk of localized high temperatures caused by dust accumulation. The dust-free treatment further prevents the dust from enhancing the potential explosion effect at the source. The evenly spaced protrusions 13 on the circumference of the outer wall of the housing 1 not only increase the thickness of the housing 1 at the joints, avoiding stress concentration due to dense distribution, but also enhance the connection strength between the housing 1 and the protective cover assembly 3 and the cover plate 5, improving the explosion-proof effect of the lamp, and simplifying the installation process, thus improving the ease of installation. The lamp plate 2 is fixed to the lighting cavity of the housing 1 with screws. Inside the housing 11, the light-emitting surface faces outwards. The lamp board 2 can use high-power LED chips, and a light-diffusing plate is added to the surface to ensure uniform light distribution. The protective cover assembly 3 is tightly installed with the housing 1 to further prevent external dust from entering the lamp and to ensure the light transmission performance of the light source of the lamp board 2. The lamp board 2 and the power supply 4 are independently set in the mounting cavity 12 and the lighting cavity 11, respectively. They are connected by the lead-out wires to achieve efficient power supply and isolate the external environment from corrosion and interference to electronic components. The lamp as a whole improves the explosion-proof level while taking into account the dust-free characteristics and convenient maintenance, providing a lighting solution with safety, stability and long life for high-risk scenarios such as petrochemical and underground coal mines.

[0025] Preferably, continuous clamping grooves can be provided on the housing 1, the protective cover assembly 3 and the cover plate 5. Multiple clamping grooves can be provided at intervals around the circumference of the lamp, which provides convenient conditions for fully automatic production of lamps and facilitates the transportation of lamps and the continuous clamping of processing between the preceding and following processes.

[0026] In some embodiments of this utility model, such as Figures 3 to 5 As shown, the protective cover assembly 3 includes a pressure ring 31 fixedly connected to the protrusion 13, and a glass cover 32 fixedly connected to the pressure ring 31.

[0027] Based on the above embodiments, a light-transmitting hole 31a is opened in the center of the pressure ring 31, and a fixing strip 31b extends from the end of the pressure ring 31 away from the housing 1 toward the center.

[0028] Based on the above embodiments, the edge of the glass cover 32 is fixedly connected to the fixing strip 31b, and the light-emitting surface of the lamp panel 2 is opposite to the glass cover 32.

[0029] The pressure ring 31 is fixed to the outer wall of the housing 1 by screws on the protrusion 13. This not only enhances the structural strength between the protective cover and the housing 1, but also simplifies the installation process through modular design, avoiding the process complexity caused by using a multi-stage sealing structure. For example, the light-transmitting hole 31a in the center of the pressure ring 31 extends into a fixing strip 31b, which fits tightly with the edge of the glass cover 32 using a silicone sealing ring. This not only prevents external dust from entering, but also compensates for minor deformations caused by temperature and humidity changes through the elasticity of the silicone material, ensuring long-term sealing performance. Epoxy resin can be used to seal the gap between the glass cover 32 and the pressure ring 31 in the circumference, with a seal thickness of up to 1 cm. This not only further fixes the glass cover 32 to the pressure ring 31, but also enhances the sealing performance. The glass cover 32 can be made of high-strength tempered glass with good light transmittance, and its impact resistance can effectively resist common mechanical collisions in industrial settings.

[0030] On the one hand, the screw fixing structure of the pressure ring 31 and the protrusion 13 significantly improves installation stability and sealing reliability, avoiding seal failure caused by vibration or temperature difference. On the other hand, the high light transmittance and impact resistance of the glass cover 32 ensure the uniform distribution of the light source and long-term stable operation. For example, in petrochemical enterprises, such a structure can effectively block the intrusion of flammable gas and dust mixtures. Combined with the dust-free characteristics of the gradually curved surface of the shell 1, it significantly reduces the risk of explosion caused by local high temperature or electric arc, thereby improving the explosion-proof level while taking into account lighting efficiency and equipment life.

[0031] In some embodiments of this utility model, such as Figures 3 to 5 As shown, the pressure ring 31 is provided with a first explosion-proof surface 31c on the side near the housing 1, and the first explosion-proof surface 31c abuts against the inner wall of the lighting cavity 11.

[0032] In some embodiments of this utility model, such as Figures 3 to 5 As shown, a second explosion-proof surface 52 is provided on the side of the cover plate 5 near the housing 1, and the second explosion-proof surface 52 abuts against the inner wall of the mounting cavity 12.

[0033] The first explosion-proof surface 31c and the second explosion-proof surface 52 are both tightly abutted against the inner wall of the housing 1 to form a physical barrier. The metal abutment effectively blocks flammable gases such as methane and hydrogen from penetrating into the interior of the housing 1, preventing electrical explosion accidents triggered by electric arcs or high temperatures. Moreover, by embedding the first explosion-proof surface 31c and the second explosion-proof surface 52 into the interior of the housing 1 and abutting against the inner wall, a structure similar to a reinforcing rib is formed, which significantly improves the mechanical strength and deformation resistance of the connection parts. In the event of an explosion, the explosion-proof surface and the housing 1 share the internal pressure, and its embedded structure can disperse the energy of the explosion shock wave, preventing local stress concentration that could cause the housing 1 to crack. The overall thickness of the lamp is also increased due to the first explosion-proof surface 31c and the second explosion-proof surface 52, which improves the explosion resistance of the housing and ensures that the housing is not damaged in the event of an explosion, thereby preventing the explosion energy from spreading to the external environment.

[0034] In some embodiments of this utility model, such as Figure 6 As shown, a heat dissipation component 11a is provided inside the illumination cavity 11.

[0035] Based on the above embodiments, the heat dissipation assembly 11a includes a heat dissipation groove 11a1 formed in the lighting cavity 11, and heat dissipation ribs 11a2 evenly spaced in the heat dissipation groove 11a1.

[0036] The heat dissipation groove 11a1 is preferably opened around the circumference of the lamp panel 2 to form an annular air channel, which promotes the diffusion of heat from the center of the lamp panel 2 to the surrounding area, avoids the accumulation of heat in the center of the lamp panel 2, and significantly reduces the risk of high temperature of the lamp panel 2. The heat dissipation ribs 11a2 with even spacing inside the heat dissipation groove 11a1 further enhance the heat dissipation capacity by increasing the inner surface area of ​​the cavity. For example, the ribs made of aluminum alloy can quickly transfer the heat of the lamp panel 2 to the cavity surface. With the airflow design of the circumferential heat dissipation groove 11a1, an efficient heat dissipation link is formed from the heat source to the heat dissipation ribs 11a2 to the heat dissipation groove 11a1, and finally to the surface of the shell 1. Moreover, the rigid structure of the heat dissipation ribs 11a2 can absorb external impacts and avoid heat dissipation failure caused by vibration, detachment or breakage.

[0037] In some embodiments of this utility model, such as Figure 3 As shown, several adapter brackets 14 are provided at intervals on the outer wall of the housing 1. The adapter brackets 14 not only provide a standardized connection base for the installation of external components, but also disperse the concentrated effect of external forces on the housing 1 through the spaced distribution design, avoiding local deformation or connection failure. In practical applications, the adapter brackets 14 can achieve different connection effects according to the existing environment, so that the lamp can be adjusted to the desired angle, improving the flexibility of lamp use and installation adaptability.

[0038] In some embodiments of this utility model, such as Figure 7As shown, a connecting component 53 is provided inside the connecting hole 51, including a rubber plug 53a abutting the bottom of the connecting hole 51, a retaining ring 53b abutting the rubber plug 53a, and a clamping nut 53c abutting the retaining ring 53b. The connecting assembly 53 achieves first-level sealing and buffering through the cooperation of the plug 53a and the retaining ring 53b. The plug 53a, as an elastic seal, directly abuts against the bottom of the connecting hole 51, absorbing uneven stress during initial installation and compressing for minor displacements caused by temperature changes or vibrations, thus avoiding damage to the sealing surface caused by hard contact. The retaining ring 53b serves as an intermediate support structure, dispersing the axial force applied by the clamping nut 53c through a rigid contact surface to prevent the plug 53a from over-compression and failure, and enhancing the deformation resistance of the inner wall of the connecting hole 51 through its annular structure, reducing the risk of thread stripping. The clamping nut 53c, as the final fastening element, is screwed into the connecting hole 51 and abuts against the retaining ring 53b, forming a stable axial preload to ensure a continuous sealing state between the plug 53a and the hole wall. Moreover, when the plug 53a needs to be replaced or the sealing pressure adjusted, the assembly can be quickly disassembled simply by loosening the clamping nut 53c, without damaging the original connecting structure, reducing maintenance costs and time, and further expanding the applicable scenarios of the equipment.

[0039] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A dust-free explosion-proof lighting fixture, characterized in that, include: The housing (1) has a lighting cavity (11) on one side and an installation cavity (12) on the other side. The outer wall of the housing (1) is provided with evenly spaced protrusions (13) around the circumference. A lamp plate (2) is installed inside the lighting cavity (11), with the light-emitting surface of the lamp plate (2) facing the outside of the housing (1); The protective cover assembly (3) is installed on the side of the housing (1) corresponding to the lighting cavity (11) and is fixedly connected to the housing (1) by the protrusion (13); The power supply (4) is installed in the mounting cavity (12) and is connected to the lamp plate (2); A cover plate (5) is installed on the housing (1) on one side corresponding to the mounting cavity (12), and is fixedly connected to the housing (1) by the protrusion (13). A connection hole (51) is opened on the side of the cover plate (5) away from the housing (1). The cross-sectional area of ​​the shell (1) along its length gradually increases from the end near the cover plate (5) to the end near the protective cover assembly (3), and the outer wall of the shell (1) is a smooth, continuous curved surface.

2. The dust-free explosion-proof lighting fixture according to claim 1, characterized in that, The protective cover assembly (3) includes a pressure ring (31) fixedly connected to the protrusion (13) and a glass cover (32) fixedly connected to the pressure ring (31).

3. The dust-free explosion-proof lighting fixture according to claim 2, characterized in that, The pressure ring (31) has a light-transmitting hole (31a) at its center, and a fixing strip (31b) extends from the end of the pressure ring (31) away from the housing (1) toward the center.

4. The dust-free explosion-proof lighting fixture according to claim 3, characterized in that, The edge of the glass cover (32) is fixedly connected to the fixing strip (31b), and the light-emitting surface of the lamp plate (2) is opposite to the glass cover (32).

5. The dust-free explosion-proof lighting fixture according to claim 2, characterized in that, The pressure ring (31) is provided with a first explosion-proof surface (31c) on the side near the housing (1), and the first explosion-proof surface (31c) abuts against the inner wall of the lighting cavity (11).

6. The dust-free explosion-proof lighting fixture according to claim 1, characterized in that, The cover plate (5) is provided with a second explosion-proof surface (52) on the side near the housing (1), and the second explosion-proof surface (52) abuts against the inner wall of the mounting cavity (12).

7. The dust-free explosion-proof lighting fixture according to claim 1, characterized in that, A heat dissipation assembly (11a) is provided inside the lighting cavity (11).

8. The dust-free explosion-proof lighting fixture according to claim 7, characterized in that, The heat dissipation assembly (11a) includes a heat dissipation groove (11a1) formed in the lighting cavity (11) and heat dissipation ribs (11a2) evenly spaced in the heat dissipation groove (11a1).

9. The dust-free explosion-proof lighting fixture according to claim 1, characterized in that, The outer wall of the housing (1) is provided with several spaced adapter frames (14).

10. The dust-free explosion-proof lighting fixture according to claim 1, characterized in that, A connecting assembly (53) is provided inside the connecting hole (51), including a rubber plug (53a) abutting the bottom of the connecting hole (51), a retaining ring (53b) abutting the rubber plug (53a), and a clamping nut (53c) abutting the retaining ring (53b).

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