An explosion-proof LED lighting fixture

Abstract

This disclosure relates to the field of energy-saving lighting technology and provides an explosion-proof LED lighting fixture, including a lamp body made of die-cast material. Multiple heat dissipation fins are distributed circumferentially on the outer wall of the lamp body. An LED light source module and a lens cover are installed inside the lamp body. A sensing module is located between the LED light source module and the lens cover. A power supply housing is installed on the side of the lamp body away from the lens cover, and a power supply module sealed with potting compound is located inside the power supply housing. The lens cover is used to refract and distribute the light emitted by the light source to form a light beam with a preset light distribution angle. The sensing module is used to sense signals from a human body or moving object and controls the power supply module to adjust the output power of the LED light source module based on the sensing results. The explosion-proof LED lighting fixture provided by this disclosure can automatically adjust the lighting power according to environmental conditions, improving the energy-saving effect of the fixture. It also possesses good explosion-proof performance, sealing performance, and heat dissipation performance, making it suitable for lighting use in flammable and explosive environments.

Description

Technical Field

[0001] This disclosure relates to the field of energy-saving lighting technology, and more specifically, to an explosion-proof LED lighting fixture. Background Technology

[0002] LED lighting fixtures are widely used in industrial lighting, warehouse lighting, and hazardous environment lighting due to their advantages such as energy saving, high luminous efficiency, and long lifespan. Especially in places with flammable and explosive gases or dust, such as petroleum, chemical, mining, power, and port industries, higher requirements are placed on the explosion-proof performance, safety performance, and energy-saving performance of lighting fixtures.

[0003] In existing technologies, traditional explosion-proof LED lighting fixtures typically operate at full power continuously, failing to automatically reduce power or shut off even in unoccupied areas, resulting in significant energy waste. Furthermore, traditional explosion-proof LED lighting fixtures suffer from the following shortcomings: Firstly, while some sensor-based lighting fixtures have added sensing functions to improve their intelligence, the high requirements for the stability, sealing, and heat dissipation performance of electronic components in explosion-proof environments make it difficult to achieve an integrated design of the intelligent sensing system and the explosion-proof structure. Secondly, due to the significant heat dissipation requirements of traditional explosion-proof LED lighting fixtures, empirical redundancy designs are often employed, resulting in larger fixture volumes and heavier structures, increasing manufacturing costs and installation difficulty.

[0004] Therefore, how to provide an explosion-proof LED lighting fixture that integrates the intelligent sensing system with the explosion-proof structure and has good heat dissipation performance has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this disclosure is to provide an explosion-proof LED lighting fixture that solves the problems mentioned in the background art.

[0006] The present disclosure provides an explosion-proof LED lighting fixture, including a lamp body made by die casting. The outer wall of the lamp body has a plurality of heat dissipation fins distributed along its circumference. An LED light source module and a lens cover are installed inside the lamp body. A sensing module is provided between the LED light source module and the lens cover. The lens cover has a receiving cavity. The sensing module is at least partially embedded in the receiving cavity so that the lens cover is tightly attached to the LED light source module. A power supply housing is installed on the side of the lamp body away from the lens cover. The power supply housing contains a power supply module sealed with potting compound. The LED light source module, the sensing module, and the power supply module are electrically connected to each other. The lens cover is used to refract and distribute the light emitted by the light source to form a light beam with a preset light distribution angle; the sensing module is used to sense human body or moving object signals and control the power module to adjust the output power of the LED light source module according to the sensing results.

[0007] Optionally, the LED light source module includes a light source board that is mounted close to the lamp body and electrically connected to the sensing module, and a plurality of light-emitting lamps arranged in a circular array are distributed on the light source board; The lens cover has multiple lens sections distributed on it, and each lens section corresponds to a light-emitting plate. The light-emitting lamp is at least partially embedded in the lens section.

[0008] Optionally, the side of the lens facing the light source is concave, and the side of the lens facing away from the light source is convex. The convex side does not extend beyond the lens cover away from the light source, so that the light emitted by the light source is refracted by the lens to form a light beam with a preset light distribution angle.

[0009] Optionally, a partition frame is nested between the lamp body and the power supply housing, and the lamp body is fitted with an inner sealing ring that abuts against the partition frame, so that the inner cavity of the lamp body and the inner cavity of the power supply housing are interconnected and form a sealed cavity.

[0010] Optionally, the power supply housing is provided with an outer sealing ring and a clamping block on the side away from the lamp body. The power supply module is electrically connected to a cable that passes through the outer sealing ring and the clamping block in sequence. A first cable sleeve is installed inside the power supply housing and is fitted onto the cable. The outer sealing ring is pressed against the first cable sleeve.

[0011] Optionally, the clamping block is threadedly connected to the power supply housing, and a pressure ring is provided between the clamping block and the outer sealing ring to deform the outer sealing ring under pressure and cover the cable.

[0012] Optionally, three heat dissipation fins are connected to form a first heat dissipation part, and four heat dissipation fins are connected to form a second heat dissipation part. The first heat dissipation part and the second heat dissipation part are alternately distributed on the lamp body, and there are ventilation gaps between the first heat dissipation part and the second heat dissipation part and the outer wall of the power supply housing.

[0013] Optionally, a first heat dissipation gap is provided between two adjacent heat dissipation fins in the first heat dissipation section, and a second heat dissipation gap is provided between two adjacent heat dissipation fins in the second heat dissipation section. The widths of the first heat dissipation gap and the second heat dissipation gap gradually increase along the direction away from the center line of the lamp body.

[0014] Optionally, a through hole is provided in the center of the light source board, and a second wire sheath is installed at the through hole. The second wire sheath is used to cover the wires that are electrically connected to the sensing module; a plurality of the light-emitting lamps are distributed in a ring around the circumference of the sensing module.

[0015] Optionally, the lamp body is provided with a sealing protrusion ring, the lens cover is provided with a sealing groove that is inserted and engaged with the sealing protrusion ring, and the LED light source module is installed inside the sealing protrusion ring.

[0016] As can be seen from the above technical solution, the explosion-proof LED lighting fixture in the exemplary embodiment of this disclosure has at least the following advantages and positive effects: 1. By installing an LED light source module, lens cover, and sensing module inside the lamp body, and having the sensing module control the output power of the LED light source module based on the sensing results, the lamp can automatically adjust the lighting power according to the activity status of a human body or moving object, thereby reducing energy consumption and improving the energy-saving effect of the lamp while meeting lighting needs.

[0017] 2. By integrating the sensing module, LED light source module, and power supply module sealed with potting compound inside the lamp, the overall integration of the lamp structure can be improved, and the safety and stability of the lamp in flammable and explosive environments can be enhanced.

[0018] 3. By setting multiple heat dissipation fins on the outer wall of the lamp body, the contact area between the lamp body and the outside air can be increased, enhancing the heat dissipation performance of the lamp. This avoids excessive internal temperature during long-term operation of the lamp, thereby improving the working stability and service life of the LED light source module and power supply module.

[0019] 4. By refracting and distributing the light emitted by the LED light source module through the lens cover, a light beam with a preset light distribution angle can be formed, thereby improving the lighting effect and uniformity of the lamp.

[0020] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings: Figure 1 This diagram illustrates a three-dimensional structural schematic of an explosion-proof LED lighting fixture according to an embodiment of the present disclosure, viewed from one perspective. Figure 2 This illustration shows a three-dimensional structural diagram of an explosion-proof LED lighting fixture according to an embodiment of the present disclosure from another perspective; Figure 3 A side view of an explosion-proof LED lighting fixture according to an embodiment of the present disclosure is shown. Figure 4 It shows Figure 3 A schematic diagram of the AA cross-sectional structure; Figure 5 It shows Figure 4 A magnified structural diagram at point B; Figure 6 A schematic diagram of the lens cover in an explosion-proof LED lighting fixture according to an embodiment of the present disclosure is shown; Figure 7 A partial structural schematic diagram of an explosion-proof LED lighting fixture according to an embodiment of the present disclosure is shown; Figure 8 A three-dimensional structural schematic diagram of another explosion-proof LED lighting fixture according to an embodiment of the present disclosure is shown.

[0022] Figure label: 10. Lamp body; 11. First heat dissipation part; 111. First heat dissipation gap; 12. Second heat dissipation part; 121. Second heat dissipation gap; 13. Heat dissipation fins; 14. Sealing convex ring; 20. LED light source module; 21. Light source board; 211. Through hole; 22. Light-emitting lamp; 30. Lens cover; 31. Lens part; 311. Concave surface; 312. Convex surface; 32. Receiving cavity; 33. Sealing groove; 40. Sensing module; 50. Power supply shell; 60. Power supply module; 70. Separator; 80. Inner sealing ring; 90. Outer sealing ring; 100. Pressing block; 110. Cable; 120. First cable sleeve; 130. Pressure ring; 140. Second cable sleeve; 150. Light distribution cover. Detailed Implementation

[0023] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art.

[0024] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0025] In one embodiment of this disclosure, please refer to Figures 1 to 4 An explosion-proof LED lighting fixture includes a lamp body 10, an LED light source module 20, a lens cover 30, a sensing module 40, a power supply housing 50, and a power supply module 60. The lamp body 10 and the power supply housing 50 are fastened together by screws. The lamp body 10 is die-cast and can be made of aluminum alloy to improve its overall structural strength and thermal conductivity. Multiple heat dissipation fins 13 are distributed circumferentially on the outer wall of the lamp body 10. These fins increase the contact area between the lamp body 10 and the outside air, thereby improving the heat dissipation performance of the lighting fixture during operation.

[0026] The LED light source module 20 is fastened to the lamp body 10 with screws and provides the lighting source. A lens cover 30 is installed inside the lamp body 10 and is located on the light-emitting side of the LED light source module 20. The lens cover 30 refracts and distributes the light emitted by the LED light source module 20 to form a light beam with a preset light distribution angle, thereby improving the lighting effect and uniformity of the lamp. A sensing module 40 is disposed between the LED light source module 20 and the lens cover 30 and is electrically connected to the LED light source module 20. The sensing module 40 senses human body or moving object signals and outputs control signals based on the sensing results.

[0027] A power supply housing 50 is installed on the side of the lamp body 10 opposite to the lens cover 30. The power supply housing 50 and the lamp body 10 are connected to form an installation space. The power supply module 60 is installed inside the power supply housing 50 and is sealed with potting compound. By sealing the power supply module 60 with potting compound, the sealing and protection performance of the power supply module 60 can be improved, preventing external moisture, dust, or flammable and explosive gases from entering the interior of the power supply module 60, thereby improving the safety of the lamp in hazardous environments. The LED light source module 20, the sensing module 40, and the power supply module 60 are electrically connected to each other. The power supply module 60 supplies power to the LED light source module 20 and the sensing module 40, and adjusts the output power of the LED light source module 20 according to the control signal output by the sensing module 40.

[0028] Specifically, when the sensing module 40 senses human body or moving object activity, the sensing module 40 controls the LED light source module 20 to operate at a higher power to meet lighting needs; when the sensing module 40 does not sense human body or moving object activity, the sensing module 40 controls the LED light source module 20 to reduce output power or enter standby mode, thereby reducing lamp energy consumption and improving the lamp's energy-saving effect.

[0029] The explosion-proof LED lighting fixture in the above embodiments, by integrating an LED light source module 20, a lens cover 30, and a sensing module 40 within the lamp body 10, and combining this with a power supply module 60 sealed with potting compound, can achieve intelligent sensing and control functions while meeting the requirements for use in explosion-proof environments, thereby improving the intelligence level and safety of the fixture. Furthermore, by providing multiple heat dissipation fins 13 on the outer wall of the lamp body 10, the overall heat dissipation performance of the fixture can be enhanced, preventing excessively high internal temperatures during prolonged operation, thereby improving the operational stability and lifespan of the LED light source module 20 and the power supply module 60.

[0030] In one embodiment of this disclosure, the sensing module 40 is used to sense the activity state of a human body or a moving object, and control the working state of the LED light source module 20 based on the sensing result. Specifically, the sensing module 40 can be any one or a combination of microwave sensing modules, millimeter-wave sensing modules, infrared sensing modules, and radar sensing modules. When the sensing module 40 senses human body or moving object activity, the sensing module 40 controls the LED light source module 20 to operate at higher power; when the sensing module 40 does not sense human body or moving object activity, the sensing module 40 controls the LED light source module 20 to reduce output power or enter standby mode.

[0031] For example, the sensing module 40 can control the power supply module 60 to adjust the output power of the LED light source module 20 via a PWM dimming signal or a 0-10V dimming signal. This configuration allows for the selection of different sensing methods based on various application scenarios, thereby improving the environmental adaptability and operational flexibility of the lighting fixture. Simultaneously, intelligent dimming control of the LED light source module 20 via the sensing module 40 can reduce energy consumption when the lighting fixture is unattended, improving its energy-saving performance.

[0032] In one embodiment of this disclosure, please refer to Figures 1 to 7 The LED light source module 20 includes a light source board 21 and multiple LED lights 22 disposed on the light source board 21. The light source board 21 is installed inside the lamp body 10 and is electrically connected to the sensing module 40. The multiple LED lights 22 are distributed on the light source board 21, and the multiple LED lights 22 can be arranged in a circular array, so that the light emitted by the multiple LED lights 22 is more uniformly distributed, thereby improving the overall lighting uniformity of the lamp.

[0033] The lens cover 30 has multiple lens sections 31 distributed on it, with each lens section 31 corresponding to a plurality of light-emitting lamps 22. Specifically, each lens section 31 corresponds to one light-emitting lamp 22, and the light-emitting lamp 22 is at least partially embedded in the corresponding lens section 31. This arrangement shortens the light path between the light-emitting lamp 22 and the lens section 31, improving the refraction and light distribution effect of the lens section 31, thereby improving the light output efficiency and illumination effect of the lamp. At the same time, by having multiple lens sections 31 correspond one-to-one with multiple light-emitting lamps 22, the consistency of the light output direction of each light-emitting lamp 22 can also be improved, thereby forming a more uniform light beam and improving the illumination uniformity of the lamp.

[0034] In one embodiment of this disclosure, please continue to refer to Figures 1 to 7 The lens portion 31 has a concave surface 311 facing the light source 22, and a convex surface 312 on the side facing away from the light source 22. Light emitted from the light source 22 is refracted sequentially through the concave surface 311 and the convex surface 312 before being emitted outwards. The convex surface 312 does not extend beyond the side of the lens cover 30 away from the light source 22; that is, the entire convex surface 312 is located within the outer contour of the lens cover 30. This design prevents the lens portion 31 from protruding excessively and being damaged by external impacts, while also facilitating the integral molding and manufacturing of the lens cover 30.

[0035] Specifically, by setting the curvature parameters of the concave surface 311 and the convex surface 312, the light emitted by the lamp 22 can be refracted and distributed, so that the light emitted by the lamp 22, after being refracted by the lens 31, forms a light beam with a preset light distribution angle of 80 degrees. In this way, the lamp can form a larger illumination range and improve the lighting coverage effect of the lamp.

[0036] In the above embodiment, the lens portion 31, with its concave surface 311 and convex surface 312, combined with the corresponding fit between the light-emitting lamp 22 and the lens portion 31, can improve the refraction and light distribution effect of the lens cover 30, thereby improving the illumination uniformity and light output efficiency of the lamp. Furthermore, by ensuring that the convex surface 312 does not protrude beyond the outer surface of the lens cover 30, the structural stability of the lens cover 30 can also be improved.

[0037] In one embodiment of this disclosure, please refer to Figure 4 and Figure 5 A partition frame 70 is nested between the lamp body 10 and the power supply housing 50. The partition frame 70 can be set at the connection position between the lamp body 10 and the power supply housing 50, and is used to connect and support the lamp body 10 and the power supply housing 50. The lamp body 10 is fitted with an inner sealing ring 80, which is tightly abutted against the partition frame 70.

[0038] Specifically, the inner sealing ring 80 can be fitted around the outer periphery of the lamp body 10, and the inner sealing ring 80 is located between the lamp body 10 and the partition frame 70. After the lamp body 10 and the power supply housing 50 are assembled, the partition frame 70 presses the inner sealing ring 80, so that the inner sealing ring 80 is deformed under pressure and fits tightly against the lamp body 10 and the partition frame 70 respectively. This arrangement allows the inner cavity of the lamp body 10 and the inner cavity of the power supply housing 50 to communicate with each other and form a sealed cavity, thereby improving the overall sealing performance of the lamp and preventing external moisture, dust or flammable and explosive gases from entering the lamp, thus improving the safety of the lamp in hazardous environments. At the same time, the partition frame 70 can also improve the stability of the connection structure between the lamp body 10 and the power supply housing 50, thereby improving the overall structural strength and installation reliability of the lamp.

[0039] In one embodiment of this disclosure, please continue to refer to Figure 4 and Figure 5 The power supply housing 50 is provided with an outer sealing ring 90 and a clamping block 100 on the side away from the lamp body 10. The power supply module 60 is electrically connected to a cable 110. The cable 110 passes through the outer sealing ring 90 and the clamping block 100 in sequence and extends to the outside of the power supply housing 50 to realize the electrical connection between the lamp and the external power supply.

[0040] The power supply housing 50 contains a first cable sheath 120, which is sleeved onto the cable 110. An outer sealing ring 90 is pressed against the first cable sheath 120. Specifically, the first cable sheath 120 can be made of rubber or silicone to buffer and protect the cable 110, preventing the cable 110 from directly contacting the power supply housing 50 and being worn.

[0041] Meanwhile, by pressing the outer sealing ring 90 onto the first protective sleeve 120, the sealing performance at the point where the cable 110 exits can be improved, preventing external moisture, dust, or flammable and explosive gases from entering the power supply housing 50 along the cable 110, thereby improving the overall protection and explosion-proof performance of the lamp.

[0042] In one embodiment of this disclosure, please continue to refer to Figure 4 and Figure 5 The clamping block 100 is threadedly connected to the power supply housing 50. Specifically, the clamping block 100 can be screwed onto the mounting opening in the power supply housing 50. A pressure ring 130 is provided between the clamping block 100 and the outer sealing ring 90, which is used to press the outer sealing ring 90. When the clamping block 100 is screwed tightly onto the power supply housing 50, the clamping block 100 pushes the pressure ring 130 to move towards the outer sealing ring 90, thereby causing the outer sealing ring 90 to be deformed under pressure. After being compressed, the outer sealing ring 90 covers the outer periphery of the cable 110 and abuts against the first cable sheath 120, thereby further improving the sealing effect at the point where the cable 110 exits.

[0043] In the above embodiment, the clamping block 100 is connected to the power supply housing 50 via a threaded connection, which facilitates the adjustment of the clamping degree of the outer sealing ring 90, thereby improving the convenience of lamp assembly. In addition, by clamping the outer sealing ring 90 with the pressure ring 130, the outer sealing ring 90 can be evenly stressed, improving the stability and reliability of the sealing structure.

[0044] In one embodiment of this disclosure, please refer to Figures 1 to 4 Multiple heat dissipation fins 13 are distributed on the outer wall of the lamp body 10. Specifically, three heat dissipation fins 13 are connected to form a first heat dissipation section 11, and four heat dissipation fins 13 are connected to form a second heat dissipation section 12. The multiple first heat dissipation sections 11 and multiple second heat dissipation sections 12 are alternately distributed along the circumference of the lamp body 10. Ventilation gaps exist between the first heat dissipation sections 11 and the second heat dissipation sections 12 and the outer wall of the power supply housing 50. This arrangement creates multiple airflow channels between the lamp body 10 and the power supply housing 50, thereby improving airflow.

[0045] Specifically, when the lamp is working, the heat generated by the LED light source module 20 and the power supply module 60 is transferred to the lamp body 10, and the heat is then conducted outward through multiple heat dissipation fins 13. Because a ventilation gap is formed between the first heat dissipation part 11 and the second heat dissipation part 12, outside air can flow along the ventilation gap, thereby accelerating heat dissipation and improving the overall heat dissipation performance of the lamp. At the same time, by setting the first heat dissipation part 11 and the second heat dissipation part 12 alternately, the heat dissipation area of ​​the lamp body 10 can be increased while ensuring the overall structural strength of the lamp body 10, thereby improving the heat dissipation stability of the lamp during long-term operation.

[0046] In one embodiment of this disclosure, please continue to refer to Figures 1 to 4 A first heat dissipation gap 111 is provided between two adjacent heat dissipation fins 13 in the first heat dissipation section 11, and a second heat dissipation gap 121 is provided between two adjacent heat dissipation fins 13 in the second heat dissipation section 12. The widths of the first heat dissipation gap 111 and the second heat dissipation gap 121 gradually increase along the direction away from the center line of the lamp body 10. Specifically, the first heat dissipation gap 111 and the second heat dissipation gap 121 can be in the shape of a trumpet or a gradually expanding shape. The gradually expanding heat dissipation gap guides air to flow outward along the lamp body 10, increases the air flow velocity between the heat dissipation fins 10, and improves the heat exchange efficiency. The alternating arrangement of the first heat dissipation section 11 and the second heat dissipation section 12 forms a multi-channel airflow, making the temperature distribution inside the lamp body more uniform and avoiding local overheating.

[0047] The above-described structure allows outside air to more easily enter the first heat dissipation gap 111 and the second heat dissipation gap 121, thereby improving airflow efficiency. Simultaneously, as the first and second heat dissipation gaps 111 and 121 gradually increase in size, airflow resistance is reduced, enhancing the heat exchange effect between the heat dissipation fins 13. Furthermore, the gradually expanding first and second heat dissipation gaps 111 and 121 reduce the accumulation of dust or debris between the heat dissipation fins 13, preventing blockage of the heat dissipation channels and improving the heat dissipation stability of the lamp during long-term use.

[0048] The first heat dissipation part 11, the second heat dissipation part 12, and the gradually expanding first heat dissipation gap 111 and second heat dissipation gap 121 in the above embodiments cooperate with each other to improve the heat exchange efficiency between the lamp body 10 and the outside air, thereby improving the overall heat dissipation performance of the lamp, avoiding excessive internal temperature when the lamp works for a long time, and thus improving the working stability and service life of the LED light source module 20 and the power supply module 60.

[0049] In one embodiment of this disclosure, please refer to Figures 4 to 7 A through hole 211 is provided in the center of the light source board 21, and a second wire sheath 140 is installed at the through hole 211. The second wire sheath 140 is used to cover the wires of the electrical connection sensing module 40.

[0050] Specifically, the sensing module 40 can be disposed between the lens cover 30 and the LED light source module 20. The sensing module 40 and the power supply module 60 are electrically connected by wires. The wires pass through the through hole 211 in the center of the light source plate 21 and connect to the sensing module 40. A second protective sleeve 140 is fitted around the outer periphery of the wire and installed at the through hole 211. This arrangement avoids direct contact between the wire and the light source plate 21, preventing wear and tear, and also provides cushioning and protection for the wire, thereby improving the stability and reliability of the electrical connection structure.

[0051] The lens cover 30 has a receiving cavity 32, which provides installation space for the sensing module 40. Specifically, the sensing module 40 is at least partially housed within the receiving cavity 32, allowing the lens cover 30 to be positioned flush against the LED light source module 20. This arrangement reduces the additional installation space occupied by the sensing module 40, thereby reducing the overall size of the luminaire and improving the compactness of the internal structure. Simultaneously, multiple LEDs 22 are arranged in a ring around the circumference of the sensing module 40. This arrangement prevents the sensing module 40 from blocking the light emitted by the LEDs 22, thus improving the overall uniformity of light output and the lighting effect. By placing the sensing module 40 at the center of the LED light source module 20, signals emitted by a human body or moving object can uniformly cover the area surrounding the LED light source, improving the sensitivity and response speed of the sensing module 40. In the metal shielding environment of the explosion-proof lamp body 10, the influence of shielding on the sensing signal can be reduced through the reasonable layout of the receiving cavity 32 and the ring-shaped LED arrangement.

[0052] The second protective sleeve 140, the receiving cavity 32, and the annular distribution structure of multiple light-emitting lamps 22 in the above embodiment cooperate with each other, which can not only improve the stability and reliability of the installation structure of the sensing module 40, but also reduce the internal space occupied by the lamp, improve the compactness of the overall structure of the lamp, and improve the uniformity of lighting.

[0053] In one embodiment of this disclosure, please refer to Figures 4 to 6 The lamp body 10 is provided with a sealing protrusion 14, and the lens cover 30 is provided with a sealing groove 33 that is inserted and matched with the sealing protrusion 14.

[0054] Specifically, the sealing ring 14 is arranged circumferentially around the lamp body 10, and the sealing groove 33 is correspondingly arranged on the side of the lens cover 30 facing the lamp body 10. When the lens cover 30 is installed on the lamp body 10, the sealing ring 14 is inserted into the sealing groove 33, so that a plug-in mating structure is formed between the lens cover 30 and the lamp body 10. The LED light source module 20 is installed within the sealing ring 14. This arrangement allows the LED light source module 20 to be located within the sealing area formed by the sealing ring 14, thereby improving the sealing performance of the area where the LED light source module 20 is located.

[0055] Meanwhile, the interlocking fit between the sealing ring 14 and the sealing groove 33 increases the contact length between the lamp body 10 and the lens cover 30, thereby reducing the entry of external moisture, dust, or flammable and explosive gases into the lamp, and improving the overall protective and explosion-proof performance of the lamp. Furthermore, the interlocking structure between the sealing ring 14 and the sealing groove 33 also improves the positioning effect of the connection structure between the lens cover 30 and the lamp body 10, thus enhancing the positional stability and assembly reliability of the lens cover 30 during installation.

[0056] In the above embodiments, the sealing protrusion 14 and the sealing groove 33 cooperate with each other to improve the sealing performance and connection stability between the lamp body 10 and the lens cover 30, thereby improving the overall protection performance of the lamp.

[0057] In one embodiment of this disclosure, please refer to Figure 4 and Figure 5 The lamp body 10, power supply housing 50, and various sealing structures together form a restricted breathing type explosion-proof structure. Specifically, the inner sealing ring 80, outer sealing ring 90, sealing convex ring 14, and sealing groove 33 cooperate with each other to reduce gas exchange between the inside of the lamp and the external environment. The sensing module 40 is partially housed within the lens cover 30 and integrated with the LED annular layout, reducing the stacking space of internal components in the lamp body 10. This facilitates the restricted breathing type explosion-proof structure design and makes the explosion-proof sealing cavity compact. With this arrangement, the sensing module 40 can employ various methods such as microwave, millimeter wave, infrared, and radar. Furthermore, with the annular LED arrangement and the auxiliary space of the housing cavity 32, different types of sensing modules can achieve good detection results.

[0058] This design reduces the entry of flammable and explosive gases, moisture, or dust from the outside into the luminaire, thereby lowering the risk of an explosive mixture forming inside and improving the luminaire's safety in explosive atmospheres. Simultaneously, by employing a restricted breathing explosion-proof structure, the luminaire's volume can be reduced while maintaining its explosion-proof performance, thus improving the compactness of the luminaire's structural layout. Optionally, the restricted breathing explosion-proof structure meets the requirements for use in Zone II explosive atmospheres.

[0059] In one embodiment of this disclosure, the lamp body 10 is provided with a mounting bracket (not shown). The mounting bracket can be connected to the lamp body 10 by bolts to make the lamp suitable for bracket installation. Specifically, the mounting bracket can adjust the installation angle of the lamp, thereby facilitating the adjustment of the lamp's illumination direction according to different lighting needs.

[0060] In one embodiment of this disclosure, the power supply housing 50 is provided with a hanging connection structure (not shown), which can be connected to a hanging pipe to make the luminaire suitable for hanging pipe installation. This arrangement allows for selection of bracket installation or hanging pipe installation according to different usage environments, thereby improving the flexibility of luminaire installation and environmental adaptability. At the same time, by providing a detachable installation structure, the convenience of later maintenance and replacement of the luminaire can also be improved.

[0061] In one embodiment of this disclosure, please refer to Figure 8The lens cover 30 is replaced with a light-diffusing cover 150. The other structures of the lamp are the same as in the previous embodiment and will not be repeated here. Specifically, the light-diffusing cover 150 is installed on the light-emitting side of the lamp body 10, and the light-diffusing cover 150 is located in the light-emitting direction of the LED light source module 20. The light-diffusing cover 150 can be made of translucent plastic or glass material, and is used to diffuse and uniformly mix the light emitted by the LED light source module 20.

[0062] This design reduces the brightness differences between the multiple LEDs 22, resulting in a more uniform and softer overall light output, avoiding noticeable light spots, and improving visual comfort. Furthermore, compared to the lens cover 30 which directs light distribution, the light-diffusing cover 150 is more suitable for applications requiring high uniformity of illumination, thus expanding the applicability of the luminaire. In addition, the light-diffusing cover 150 also provides shielding and protection for the LED light source module 20 and the sensing module 40, thereby improving the protective performance and reliability of the luminaire's internal structure.

[0063] In one embodiment of this disclosure, please refer to Figures 1 to 8 An installation method for an explosion-proof LED lighting fixture includes the following steps: S1. Install the LED light source module 20 inside the lamp body 10. Specifically, fix the light source board 21 inside the lamp body 10 with screws, and arrange multiple light-emitting lamps 22 facing the light emission direction of the lens cover 30 so that the LED light source module 20 is tightly attached to the lamp body 10, thereby improving the heat conduction performance between the LED light source module 20 and the lamp body 10.

[0064] S2. Install the sensing module 40 between the LED light source module 20 and the lens cover 30, and electrically connect the sensing module 40 to the LED light source module 20. Specifically, the connecting wire of the sensing module 40 passes through the through hole 211 on the light source board 21, and is protected by the second protective sleeve 140 to prevent the wire from directly contacting the light source board 21 and being worn. The sensing module 40 is at least partially housed in the receiving cavity 32 of the lens cover 30 to reduce the installation space occupied by the sensing module 40 and improve the compactness of the internal structure of the lamp.

[0065] S3. Install the lens cover 30 onto the lamp body 10. Specifically, insert the sealing protrusion 14 on the lamp body 10 into the sealing groove 33 on the lens cover 30 so that a plug-in mating structure is formed between the lens cover 30 and the lamp body 10, thereby improving the sealing performance and connection stability between the lens cover 30 and the lamp body 10.

[0066] S4. The cable 110 is passed sequentially through the first protective sleeve 120, the outer sealing ring 90, the pressure ring 130, and the clamping block 100 and then extends into the power supply housing 50. The first protective sleeve 120 is fitted around the outer periphery of the cable 110 to buffer and protect the cable 110.

[0067] S5. Connect the cable 110 to the power module 60 electrically, and install the power module 60 inside the power housing 50. Specifically, after the power module 60 is installed, fix the connection position between the power module 60 and the cable 110 to improve the stability of the connection structure.

[0068] S6. Perform potting and sealing treatment on the power module 60. Specifically, potting compound can be filled around the power module 60 to improve the sealing and protection performance of the power module 60, thereby reducing the entry of external moisture, dust or flammable and explosive gases into the power module 60.

[0069] S7. The inner sealing ring 80 is fitted onto the outer periphery of the lamp body 10, and the partition frame 70 is placed between the lamp body 10 and the power supply housing 50. Specifically, during the assembly process of the lamp body 10 and the power supply housing 50, the partition frame 70 presses the inner sealing ring 80 so that the inner sealing ring 80 is deformed by pressure and fits tightly with the lamp body 10 and the partition frame 70 respectively, thereby forming a sealed cavity.

[0070] S8. Connect the clamping block 100 to the power housing 50 by thread, and push the pressure ring 130 to press the outer sealing ring 90 through the clamping block 100. Specifically, after being pressed, the outer sealing ring 90 covers the outer periphery of the cable 110 and abuts against the first protective sleeve 120 to improve the sealing performance at the point where the cable 110 passes through.

[0071] S9. Connect and fix the power supply housing 50 to the lamp body 10 to form a complete lamp structure.

[0072] With this configuration, the lamp body 10, power supply housing 50, and various sealing structures together form a restricted breathing explosion-proof structure, thereby reducing gas exchange between the inside and outside of the lamp and improving the lamp's safety in explosive environments. Optionally, after the lamp is assembled, it can be fixed to the mounting surface using a mounting bracket, or connected to a hanging pipe using a sling connection structure, to meet installation requirements in different usage environments.

[0073] The installation method in the above embodiments, by installing and sealing the LED light source module 20, the sensing module 40, the power supply module 60, and the sealing structure in stages, can not only improve the overall assembly efficiency of the lamp, but also improve the sealing performance, explosion-proof performance, and structural stability of the lamp, thereby ensuring the safe use of the lamp in flammable and explosive environments.

[0074] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0075] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. An explosion-proof LED lighting fixture, characterized by, The lamp body is made by die casting. Multiple heat dissipation fins are distributed on the outer wall of the lamp body along its circumference. An LED light source module and a lens cover are installed inside the lamp body. A sensing module is provided between the LED light source module and the lens cover. A receiving cavity is provided inside the lens cover. The sensing module is at least partially embedded in the receiving cavity so that the lens cover is tightly attached to the LED light source module. A power supply housing is installed on the side of the lamp body away from the lens cover. The power supply housing contains a power supply module sealed with potting compound. The LED light source module, the sensing module, and the power supply module are electrically connected to each other. The lens cover is used to refract and distribute the light emitted by the light source to form a light beam with a preset light distribution angle; the sensing module is used to sense human body or moving object signals and control the power module to adjust the output power of the LED light source module according to the sensing results.

2. The explosion-proof LED lighting fixture of claim 1, wherein, The LED light source module includes a light source board that is tightly installed inside the lamp body and electrically connected to the sensing module. The light source board has multiple light-emitting lamps arranged in a circular array. The lens cover has multiple lens sections distributed on it, and each lens section corresponds to a light-emitting plate. The light-emitting lamp is at least partially embedded in the lens section.

3. The explosion-proof LED lighting fixture of claim 2, wherein, The side of the lens facing the light source is concave, and the side of the lens facing away from the light source is convex. The convex side does not extend beyond the lens cover away from the light source, so that the light emitted by the light source is refracted by the lens to form a light beam with a preset light distribution angle.

4. The explosion-proof LED lighting fixture of claim 1, wherein, A partition frame is nested between the lamp body and the power supply housing. The lamp body is fitted with an inner sealing ring that abuts against the partition frame, so that the inner cavity of the lamp body and the inner cavity of the power supply housing are interconnected and form a sealed cavity.

5. The explosion-proof LED lighting fixture of claim 4, wherein, The power supply housing is provided with an outer sealing ring and a clamping block on the side away from the lamp body. The power supply module is connected to a cable that passes through the outer sealing ring and the clamping block in sequence. A first cable sleeve is installed inside the power supply housing and is fitted onto the cable. The outer sealing ring is pressed against the first cable sleeve.

6. The explosion-proof LED lighting fixture of claim 5, wherein, The clamping block is threadedly connected to the power supply housing, and a pressure ring is provided between the clamping block and the outer sealing ring to deform the outer sealing ring under pressure and cover the cable.

7. The explosion-proof LED lighting fixture of claim 1, wherein, Three heat dissipation fins are connected to form a first heat dissipation part, and four heat dissipation fins are connected to form a second heat dissipation part. The first heat dissipation part and the second heat dissipation part are alternately distributed on the lamp body, and there are ventilation gaps between the first heat dissipation part and the second heat dissipation part and the outer wall of the power supply housing.

8. The explosion-proof LED lighting fixture of claim 7, wherein, A first heat dissipation gap is provided between two adjacent heat dissipation fins in the first heat dissipation section, and a second heat dissipation gap is provided between two adjacent heat dissipation fins in the second heat dissipation section. The widths of the first heat dissipation gap and the second heat dissipation gap gradually increase along the direction away from the center line of the lamp body.

9. The explosion-proof LED lighting fixture of claim 2, wherein, The light source board has a through hole in the center, and a second wire sheath is installed at the through hole. The second wire sheath is used to cover the wires that are electrically connected to the sensing module; a plurality of the light-emitting lamps are distributed in a ring around the circumference of the sensing module.

10. The explosion-proof LED lighting fixture of claim 1, wherein, The lamp body is provided with a sealing convex ring, the lens cover is provided with a sealing groove which is inserted and matched with the sealing convex ring, and the LED light source module is installed in the sealing convex ring.

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