Explosion-proof lamp

Abstract

The utility model is suitable for the technical field of lighting equipment, and provides an explosion-proof lamp. Comprising a lamp body, a rear cover connected with an opening in the rear end of the lamp body, a first cable arranged in the rear cover and electrically connected with a main control circuit board arranged in the lamp body, and a middle connecting pipe which penetrates into the rear cover from a lead-in hole of the rear cover after being connected with the free end of the first cable outside the lamp body. One end of the second cable is connected with the middle connecting pipe, and the other end of the second cable is used for being connected with a power supply; the first cable and the second cable connected with two ends of the middle connecting pipe are electrically connected; a sealing piece and a pressing piece which are arranged on the second cable in a sleeving mode are arranged in the lead-in hole of the rear cover, and the pressing piece is connected with the inner wall of the lead-in hole and used for pressing the sealing piece so that the sealing piece can be attached to and sealed with the second cable after being expanded in the radial direction. The explosion-proof lamp solves the problems of low sealing performance and low efficiency caused by the fact that the existing explosion-proof lamp needs to be disassembled and assembled when being connected with a cable.

Description

Technical Field

[0001] The utility model relates to the technical field of lighting equipment, in particular to an explosion-proof lamp. Background Art

[0002] Explosion-proof electrical equipment, especially explosion-proof lamps, have specific sealing requirements for the cables connected. At present, when connecting cables to explosion-proof electrical equipment, it is usually necessary to disassemble the equipment to introduce the cables into the interior, and then reinstall the equipment for sealing after the connection is completed. The sealing process mainly relies on a compression nut-type cable entry device, which is usually set at the cable introduction position on the equipment housing to complete the sealing between the cable and the equipment. After the cable is connected to the interior of the equipment, the compression nut squeezes the sealing ring to cause it to expand radially, thereby blocking the introduction position and achieving sealing.

[0003] However, the existing operation process involves the disassembly of equipment. Once the equipment is disassembled, the sealing performance may be reduced, which may affect the integrity of the seal. For example, the elasticity of the sealing ring decreases and the high skill level required by the operator in the subsequent installation process. If the subsequent installation is not in place, the detection instruments for explosion-proof electrical equipment at the operation site are not as complete as those during factory production, which may leave problems that are not discovered on the spot. Compared with factory production, on-site inspections are not strict enough and may cause safety hazards. In addition, the disassembly process is usually cumbersome and time-consuming, affecting the overall installation efficiency.

[0004] At the same time, in order to meet the explosion-proof and waterproof requirements of explosion-proof electrical equipment, if the cable wants to be connected to the equipment, the position where the cable is introduced into the equipment needs to be sealed, that is, only the introduction hole of the equipment can allow the cable to pass freely. In this case, the user cannot connect the cable to the internal circuit of the explosion-proof electrical equipment without disassembling the equipment first. Existing explosion-proof electrical equipment can basically ensure safety if it is installed and used in strict accordance with the requirements, but the complicated installation and disassembly steps will be quite cumbersome, reducing work efficiency.

[0005] At the same time, explosion-proof electrical equipment, especially flameproof and explosion-proof lamps, use stable and sturdy protective structures to ensure safety. However, due to additional steps, such as the number of screws to be removed during disassembly is much larger than that of general equipment, and the heavy weight of the disassembled shell components requires space to be found first, the operation time will be extended, thus affecting efficiency. For situations involving the installation of multiple devices or frequent site transfers, the complex process of installation and disassembly will significantly affect work efficiency, and even personnel may become tired, resulting in equipment not being installed properly and affecting safety. Utility Model Content

[0006] Based on this, the purpose of the utility model is to provide an explosion-proof lamp to fundamentally solve the problems of low sealing and efficiency caused by the need to disassemble and install the existing explosion-proof lamps when connecting cables.

[0007] An explosion-proof lamp according to an embodiment of the utility model includes:

[0008] A lamp body, a back cover connected to the rear opening of the lamp body, a first cable arranged in the back cover and electrically connected to a main control circuit board arranged in the lamp body, a middle pipe connected to the free end of the first cable outside the lamp body and then passing through the introduction hole of the back cover into the back cover, and a second cable with one end connected to the middle pipe and the other end used for connecting to a power source, wherein the first cable and the second cable connected to both ends of the middle pipe are electrically connected;

[0009] A sealing member and a pressing member sleeved on the second cable are arranged in the introduction hole of the rear cover. The pressing member is connected to the inner wall of the introduction hole and is used to press the sealing member so that the sealing member expands radially and then fits and seals with the second cable.

[0010] In addition, an explosion-proof lamp according to the above embodiment of the utility model may also have the following additional technical features:

[0011] Furthermore, connecting terminals are respectively provided on one end of the first cable and the second cable connected to the middle connecting pipe, and crimping notches are provided on the connecting terminals. Crimping grooves for crimping and fixing the first cable and the second cable are respectively provided on the outer wall of the middle connecting pipe, and the crimping notches on the connecting terminals correspond to the crimping grooves when the first cable and the second cable are accommodated in the middle connecting pipe for fixation.

[0012] Furthermore, the inner wall of the middle connecting pipe is respectively provided with sliding grooves for allowing the connecting terminals of the first cable and the second cable to slide and accommodate limiting positions, and the crimping notches on the connecting terminals correspond to the crimping grooves when the connecting terminals of the first cable and the second cable slide to the ends of the sliding grooves and stop sliding.

[0013] Furthermore, the slide groove for accommodating the connecting terminal of the first cable is adjacent to and connected to the slide groove for accommodating the connecting terminal of the second cable, and the connecting terminals of the first cable and the second cable fit together when the connecting terminals of the first cable and the second cable slide to the end of the slide groove and stop sliding.

[0014] Furthermore, avoidance notches are provided on the connection terminals of the first cable and the second cable, and the connection terminals of the first cable and the second cable cross each other when the connection terminals of the first cable and the second cable slide to the ends of the slide slots and stop sliding.

[0015] Furthermore, the crimping notch on the connecting terminal of the first cable and the crimping notch on the connecting terminal of the second cable both correspond to the same crimping groove when the first cable and the second cable are accommodated in the middle connecting pipe for fixation.

[0016] Furthermore, the first cable and the second cable each include at least two wires, each wire is provided with the connecting terminal, and the middle connecting pipe is provided with a baffle that separates at least two through chambers. The connecting terminal on any wire of the first cable and the connecting terminal on the corresponding wire of the second cable are accommodated in the same chamber of the middle connecting pipe, and the connecting terminal on each wire of the first cable is respectively accommodated in different chambers of the middle connecting pipe.

[0017] Furthermore, a baffle is provided in the middle connecting pipe to separate two through chambers, and the slide groove is arranged in a position adjacent to the baffle in the inner wall of the middle connecting pipe, and the connecting terminals of the first cable and the second cable are both in contact with the baffle when the first cable and the second cable are accommodated in the middle connecting pipe for fixation.

[0018] Furthermore, a conductive layer and an insulating melting layer are respectively provided on the inner and outer walls of the middle pipe.

[0019] Furthermore, the explosion-proof lamp also includes a front cover connected to the front end opening of the lamp body, a lampshade clamped between the front cover and the middle partition in the lamp body, a light source assembly and a junction box respectively arranged at the front and rear ends of the middle partition in the lamp body, and the main control circuit board arranged in the junction box and electrically connected to the light source assembly.

[0020] The explosion-proof lamp provided by the embodiment of the utility model is provided with a first cable extending out of the introduction hole of the rear cover when the explosion-proof lamp leaves the factory, and then a middle pipe is connected to the free end of the first cable outside the lamp body and freely passes through the introduction hole and is inserted back into the explosion-proof lamp, and then the second cable is compressed and sealed by a sealing member and a pressing member provided in the introduction hole of the rear cover, so that the electrical connection between the first cable and the second cable is completed without disassembling the explosion-proof lamp, and the explosion-proof sealing of the explosion-proof lamp is ensured, thereby effectively improving the safety; at the same time, the explosion-proof lamp is quick and convenient to connect, which can effectively improve the work efficiency, and solves the problems of low sealing and efficiency caused by the need to disassemble and install the cables when connecting the existing explosion-proof lamps. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of an explosion-proof lamp in the first embodiment of the utility model at a first viewing angle;

[0022] Figure 2 It is a cross-sectional schematic diagram of the explosion-proof lamp in the first embodiment of the utility model;

[0023] Figure 3 is a cross-sectional schematic diagram of the explosion-proof lamp in the first embodiment of the utility model at a second viewing angle;

[0024] Figure 4 This is an exploded view of the explosion-proof lamp in the first embodiment of the utility model at a third viewing angle;

[0025] Figure 5 An exploded view of the explosion-proof lamp in the first embodiment of the utility model at a fourth viewing angle;

[0026] Figure 6 An exploded view of the rear cover, the first cable, the middle pipe and the second cable of the explosion-proof lamp in the first embodiment of the utility model at a fifth viewing angle;

[0027] Figure 7 It is an exploded view of the first cable, the middle pipe and the second cable in the explosion-proof lamp in the first embodiment of the utility model at a sixth viewing angle;

[0028] Figure 8 It is a schematic diagram of an explosion cross section of a first cable, a middle pipe and a second cable in the explosion-proof lamp of the first embodiment of the utility model at a seventh viewing angle;

[0029] Fig. 9 It is a schematic diagram of an explosion cross section of a first cable, a middle pipe and a second cable in the explosion-proof lamp of the first embodiment of the utility model at an eighth viewing angle;

[0030] Fig.10 It is a schematic diagram of an explosion cross section of the first cable, the middle pipe and the second cable in the explosion-proof lamp in the first embodiment of the utility model at a ninth viewing angle;

[0031] Fig.11 for Figure 4 Enlarged view of the middle circle Ⅰ part;

[0032] Fig.12 for Figure 4 Enlarged view of the middle circle II part;

[0033] Fig.13 for Figure 5 Enlarged view of the middle circle III part;

[0034] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0035] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] Embodiment 1

[0039] See also Figure 1-Figure 13 , shown is an explosion-proof lamp in the first embodiment of the utility model. For the convenience of description, only the parts related to the embodiment of the utility model are shown. The explosion-proof lamp provided by the embodiment of the utility model includes:

[0040] A lamp body 10, a front cover 20 connected to the front opening of the lamp body 10, a lampshade 30 clamped between the front cover 20 and the middle partition 11 in the lamp body 10, a light source assembly 40 and a junction box 50 respectively arranged at the front and rear ends of the middle partition 11 in the lamp body 10, a main control circuit board 60 arranged in the junction box 50 and electrically connected to the light source assembly 40, a rear cover 70 connected to the rear opening of the lamp body 10, a first cable 80 arranged in the rear cover 70 and electrically connected to the main control circuit board 60 arranged in the lamp body 10, a middle pipe 90 connected to the free end of the first cable 80 outside the lamp body 10 and passing through the introduction hole 71 of the rear cover 70 into the rear cover 70, and a second cable 100 with one end connected to the middle pipe 90 and the other end used for connecting to a power source, and the first cable 80 connected to both ends of the middle pipe 90 and the second cable 100 are electrically connected;

[0041] A sealing member 72 and a pressing member 73 sleeved on the second cable 100 are provided in the introduction hole 71 of the rear cover 70. The pressing member 73 is connected to the inner wall of the introduction hole 71 and is used to press the sealing member 72 so that the sealing member 72 expands radially and then fits and seals with the second cable 100.

[0042] Among them, in one embodiment of the utility model, the lamp body 10 is a cylindrical shell made of metal material. Specifically, the lamp body 10 adopts a flameproof shell, wherein the front end opening of the lamp body 10 is assembled and connected with the front cover 20, and the rear end opening of the lamp body 10 is assembled and connected with the rear cover 70, and a middle partition plate 11 is provided inside the lamp body 10, so that the lamp body 10 is divided into two chambers, wherein the front chamber located on the front side of the lamp body 10 is mainly used to set a fixed light source assembly 40, and the rear chamber located on the rear side of the lamp body 10 is mainly used to set a fixed junction box 50.

[0043] In one embodiment of the utility model, the front cover 20 includes a cover body 21 connected to the lamp body 10 by fasteners and clamping and fixing the lampshade 30, and a mesh cover 22 integrally formed with the cover body 21 and protecting the lampshade 30, wherein the cover body 21 and the mesh cover 22 are made of metal material and are integrally cast. The cover body 21 is a circular ring structure, and a plurality of first fixing holes 211 are arranged at intervals on the outer edge of the cover body 21. Correspondingly, the lamp body 10 is provided with a first fixing groove 12 (or a through-hole structure) at a position corresponding to the first fixing hole 211. At this time, the front cover 20 and the lamp body 10 can be installed and fixed by fasteners such as screws, bolts, and screws through the first fixing holes 211 and the first fixing groove 12 in sequence. When in use, the fasteners can use anti-disassembly screws, and special tools are required to disassemble smoothly, so that it will not be easily disassembled at the work site, ensuring the stability of the sealing of the explosion-proof lamp. It should be noted that the width of the cover 21 is greater than the thickness of the wall of the lamp body 10. Specifically, the outer diameter of the ring of the cover 21 is roughly the same as the outer diameter of the lamp body 10 to ensure the flatness of the outer surface between the front cover 20 and the lamp body 10. At the same time, the inner diameter of the ring of the cover 21 is smaller than the inner diameter of the lamp body 10 to ensure that when the front cover 20 is assembled on the lamp body 10, the cover 21 can collide with the lampshade 30 contained in the lamp body 10. Further, the mesh cover 22 is connected to the inner ring of the cover 21, and the mesh cover 22 is similar to a cage-like structure. For details, refer to Fig.11 As shown, the mesh cover 22 is used to protect the lampshade 30 disposed therein, preventing the lampshade 30 from being damaged or contaminated by external objects, and also serves to dissipate heat and improve appearance.

[0044] In one embodiment of the present invention, the lampshade 30 is a cover-shaped member made of transparent glass material, which includes a cover-fitting portion 31 for covering the light source assembly 40, and an assembly portion 32 connected to the outer edge of the cover-fitting portion 31. Since the lampshade 30 is required to be transparent, cold-resistant, heat-resistant, ablation-resistant, and light-resistant, glass material is selected. The cover-fitting portion 31 is similar to a hemispherical structure, and its size is smaller than that of the mesh cover 22. For details, refer to Figure 4 , Figure 5 and Fig.11 As shown, the cover part 31 can protect the light source assembly 40 from external influences, and can also evenly transmit light to improve the lighting effect. The assembly part 32 is a ring-shaped structure extending outward from the outer edge of the cover part 31. When the lampshade 30 is accommodated in the lamp body 10, the upper and lower ends of the assembly part 32 are respectively against the cover body 21 and the middle partition 11, so that the front cover 20 can clamp and fix the lampshade 30. In order to prevent the lampshade 30 from moving left and right on the inner wall of the lamp body 10, in a preferred embodiment of the present invention, its assembly portion 32 abuts against the inner wall of the lamp body 10 and the middle partition 11, and the width of the assembly portion 32 is smaller than the width of the cover body 21; that is, when the lampshade 30 is accommodated in the lamp body 10, the outer diameter of the assembly portion 32 is the same as the inner diameter of the lamp body 10, so that the assembly portion 32 can abut against the cover body 21, the middle partition 11 and the inner wall of the lamp body 10 respectively, thereby achieving a firm clamping of the lampshade 30 by the front cover 20 and the lamp body 10. It should be noted that when the lampshade 30 is accommodated in the lamp body 10, there is a certain gap between the cover body 21 of the front cover 20 and the cover joint 31 or at most there is a conflict with the cover joint 31, that is, the width of the cover body 21 is less than or equal to the sum of the thickness of the tube wall of the lamp body 10 and the width of the assembly part 32, so as to avoid the problem that the lampshade 30 and the front cover 20 cannot be effectively assembled due to interference and collision between the front cover 20 and the lampshade 30 when the lampshade 30 and the front cover 20 are respectively assembled to the lamp body 10 due to the excessive width of the cover body 21. At this time, the light of the light source assembly 40 can be evenly transmitted through the lampshade 30 through the set cover joint 31, thereby improving the lighting effect of the explosion-proof lamp; at the same time, the set assembly part 32 allows the lampshade 30 to be tightly connected with the front cover 20, the lamp body 10 and the middle partition 11, respectively, to prevent the lampshade 30 from falling off or breaking when subjected to internal explosion pressure, thereby affecting the explosion-proof performance of the explosion-proof lamp.

[0045] Among them, in one embodiment of the utility model, the explosion-proof lamp also includes a first sealing ring 110 disposed between the front cover 20 and the lampshade 30, wherein the two ends of the first sealing ring 110 are respectively in conflict with the cover body 21 and the assembly part 32, and at this time, the size of the first sealing ring 110 is less than or equal to the width of the assembly part 32, specifically, the outer diameter of the first sealing ring 110 is less than or equal to the outer diameter of the assembly part 32, and the inner diameter of the first sealing ring 110 is greater than the inner diameter of the assembly part 32. Further, a circle of bone positions 212 is provided on the cover body 21 close to one side of the lampshade 30 and corresponding to the assembly part 32. Specifically, since the area of ​​the cover body 21 is larger than the area of ​​the assembly part 32, it is impossible to effectively apply force to the first sealing ring 110 during assembly. Therefore, by providing a circle of bone positions 212 on the cover body 21, the bone positions 212 on the cover body 21 can effectively apply force to press the first sealing ring 110 when applying force, thereby enhancing the sealing effect. Furthermore, the bone position 212 is a raised structure surrounding the cover body 21. The bone position 212 corresponds to the position of the assembly portion 32 and is close to the inner edge of the cover body 21, so that there is no interference between the bone position 212 and the first fixing hole 211 set at the outer edge of the cover body 21. In other words, by setting the first fixing hole 211 close to the outer edge of the cover body 21 and the bone position 212 close to the inner edge of the cover body 21, there is no interference between the first fixing hole 211 and the bone position 212. At this time, the first fixing hole 211 set on the cover body 21 and the first fixing groove 12 set on the lamp body 10 can effectively connect the front cover 20 with the lamp body 10, and the bone position 212 set on the cover body 21 and the first sealing ring 110 can effectively clamp and fix the lampshade 30 through the first sealing ring 110, thereby improving the structural stability of the explosion-proof lamp.

[0046] Among them, in one embodiment of the utility model, the explosion-proof lamp further includes a second sealing ring 120 disposed between the lampshade 30 and the lamp body 10, and a first sealing groove 13 corresponding to the second sealing ring 120 is disposed on the middle partition 11, and the second sealing ring 120 is accommodated in the first sealing groove 13 and abuts against the lampshade 30. Specifically, the first sealing groove 13 is disposed at a position corresponding to the assembly portion 32 on the middle partition 11, and at this time, a sealed space is formed between the lampshade 30 and the front cover 20 and between the lampshade 30 and the lamp body 10 by the first sealing ring 110 and the second sealing ring 120, so as to prevent dust, water vapor, etc. from entering the interior of the explosion-proof lamp, thereby preventing the gas or dust inside the lampshade 30 from contacting with the explosive mixture outside, avoiding sparks or explosions inside the explosion-proof lamp, making it suitable for various flammable and explosive environments, and ensuring the explosion-proof performance of the explosion-proof lamp. At the same time, it also plays a role in waterproofing, dustproofing and corrosion resistance, further improving the sealing performance of explosion-proof lamps, preventing the electrical components inside the explosion-proof lamps from being eroded or damaged by the outside world, and extending the service life of the explosion-proof lamps.

[0047] In one embodiment of the present invention, the junction box 50 includes a bottom plate 51 carrying the main control circuit board 60, and a side plate 52 fixed on the bottom plate 51 to close the main control circuit board 60. In one embodiment of the present invention, at least one set of diagonal portions of the main control circuit board 60 and the bottom plate 51 are respectively provided with first assembly holes, and the rear end of the middle partition 11 is provided with a fixing column 14 corresponding to the first assembly hole and carrying the junction box 50, and the fixing column 14 is provided with a second assembly hole. At this time, the main control circuit board 60 can be loaded and fixed on the junction box 50 and the junction box 50 can be loaded and fixed on the middle partition 11 after fasteners such as screws, bolts, and screws are inserted through the first assembly hole and the second assembly hole.

[0048] Among them, in one embodiment of the utility model, the light source assembly 40 includes a main light source 41 and a light source circuit board 42 connected to the main light source 41, the main light source 41 is an LED lamp bead or other high-brightness light source for emitting light, and the light-emitting surface of the main light source 41 faces the lampshade 30; the light source circuit board 42 is a printed circuit board (PCB), etc., which can control the working state of the main light source 41, wherein the main light source 41 can adopt one or more, which can be set according to actual use needs, and is not specifically limited here. Since the light source assembly 40 generates a large amount of heat when it emits light, in order to achieve effective heat dissipation of the explosion-proof lamp, in a preferred embodiment of the utility model, the explosion-proof lamp also includes a heat spreader 130 arranged between the light source assembly 40 and the middle partition 11, and a plurality of cooling fins 15 are evenly spaced on the outer surface of the lamp body 10; accordingly, the light source assembly 40 includes a main light source 41 connected to the heat spreader 130, and a light source circuit board 42 arranged on the heat spreader 130 and connected to the main light source 41, and the middle partition 11 is provided with an avoidance hole 16 for electrically connecting the light source circuit board 42 with the main control circuit board 60, so that the light source circuit board 42 is electrically connected to the main control circuit board 60 after the wire passes through the avoidance hole 16, so that the main control circuit board 60 controls the working state of the light source assembly 40.

[0049] The heat spreader 130 is a planar structure connected to the main light source 41, and is fixed by fasteners such as bolts and screws that penetrate the light source circuit board 42, the heat spreader 130 and the middle partition 11 in sequence. At this time, the heat spreader 130 can evenly disperse and conduct the heat generated by the main light source 41 to the middle partition 11 to avoid local overheating of the main light source 41. At the same time, the heat spreader 130 can also protect the main light source 41 from damage by external forces; then it is conducted to the lamp body 10 through the middle partition 11, and dissipated into the air through a plurality of heat dissipation fins 15 on the outer surface of the lamp body 10 for heat dissipation, so that the heat spreader 130 can effectively evenly disperse the heat generated by the light source assembly 40 to the outer surface of the lamp body 10, and the heat dissipation fins 15 can increase the heat dissipation area of ​​the lamp body 10, improve the heat dissipation efficiency, effectively reduce the working temperature of the explosion-proof lamp, and extend the service life of the main light source 41. Further, the lamp body 10 can be integrally formed with each heat dissipation fin 15, so that the structural strength and thermal conductivity of the lamp body 10 can be enhanced.

[0050] Furthermore, in one embodiment of the present invention, the middle position of the middle partition 11 is tilted toward the side close to the lampshade 30 to form a protruding platform, and the middle partition 11 is provided with a plurality of ribs 17 evenly distributed and staggered at the recessed position away from the lampshade 30. It should be pointed out that in one embodiment of the present invention, the height of the fixing column 14 is higher than the height of the ribs 17, so that when the junction box 50 is fixed on the fixing column 14 of the middle partition 11, there is a certain gap between the junction box 50 and the ribs 17, thereby forming a certain air circulation channel. Among them, since the middle partition 11 is the main heat dissipation component of the explosion-proof lamp, the heat generated by the main light source 41 is transferred to the middle partition 11 through the heat spreader 130, and then dissipated through the heat dissipation fins 15 on the side of the lamp body 10. If the middle partition 11 is a straight plate structure, the heat dissipation effect will be limited due to the small heat dissipation area; in the embodiment of the utility model, the middle partition 11 is tilted toward the front chamber to form a protruding platform, so as to increase the heat dissipation area and air circulation, thereby improving the heat dissipation effect of the middle partition 11 and reducing the working temperature of the main light source 41. At the same time, due to the provision of the protruding platform, the light source assembly 40 is closer to the lampshade 30, so that the light of the main light source 41 can better pass through the lampshade 30, and the light of the main light source 41 is more concentrated and uniform, thereby improving the lighting effect and lighting range of the explosion-proof lamp. At the same time, by arranging a rib plate 17 at the recessed position of the rear chamber of the middle partition 11, the strength, rigidity and stability of the middle partition 11 are increased, and the middle partition 11 is prevented from being deformed or broken when subjected to internal explosion pressure and affecting the explosion-proof performance of the explosion-proof lamp. In addition, the recess and the rib plate 17 can also increase the heat dissipation area between the middle partition 11 and the junction box 50 and form a certain air circulation channel. At this time, the air circulation can be used to perform convection heat dissipation on the middle partition 11 and the junction box 50, thereby reducing the temperature of the middle partition 11 and the junction box 50 and enhancing the heat dissipation effect.

[0051] Furthermore, in a preferred embodiment of the present invention, there are multiple main light sources 41, and each main light source 41 is evenly distributed on the protruding platform of the middle partition 11, and the number of the heat spreaders 130 is the same as the number of the main light sources 41, and each heat spreader 130 corresponds to each main light source 41. Among them, by evenly distributing multiple main light sources 41 on the protruding platform, the brightness and uniformity of the explosion-proof lamp can be improved, and the light-emitting angle and range of the light source can be increased, so that the explosion-proof lamp can better illuminate the required area; at the same time, by arranging the corresponding heat spreader 130 on each main light source 41, the heat generated by each main light source 41 can be evenly conducted and dispersed on the middle partition 11, and the life and stability of the light source can be protected to prevent the light source from overheating or damage.

[0052] In one embodiment of the present invention, the explosion-proof lamp further includes a third sealing ring 140 disposed between the lamp body 10 and the back cover 70. The rear wall of the lamp body 10 is provided with a second sealing groove 18 corresponding to the third sealing ring 140. The third sealing ring 140 is accommodated in the second sealing groove 18 and abuts against the back cover 70. The third sealing ring 140 is used to form a sealed space between the lamp body 10 and the back cover 70 to prevent the gas or dust inside the explosion-proof lamp from contacting with the explosive mixture outside to cause a secondary explosion; at the same time, it also plays the role of waterproofing, dustproofing, and anti-corrosion, thereby extending the service life of the explosion-proof lamp.

[0053] In one embodiment of the utility model, a mounting groove 19 is provided on the inner wall of the lamp body 10 near the rear cover 70, a mounting plate 74 is provided on the side of the rear cover 70 corresponding to the lamp body 10, and the mounting plate 74 is accommodated in the mounting groove 19. The rear cover 70 is also provided with an introduction hole 71 for threading the first cable 80 and the middle pipe 90, and a rotatable hook 75 is provided on the side of the rear cover 70 away from the lamp body 10. By providing the mounting groove 19 and the mounting plate 74, the rear cover 70 and the lamp body 10 can be tightly connected together to increase the connection strength between the rear cover 70 and the lamp body 10, and prevent the rear cover 70 from falling off or breaking when subjected to internal explosion pressure, thereby affecting the explosion-proof performance of the explosion-proof lamp; wherein, the number of the introduction hole 71 is at least one, which is set according to actual use needs, and the accommodating cavity formed by the rear chamber of the lamp body 10 can effectively accommodate the inserted middle pipe 90. Specifically, in the embodiment of the utility model, two relative introduction holes 71 are provided. When only one introduction hole 71 is needed, the other introduction hole 71 can be blocked to ensure its sealing performance; and when two introduction holes 71 are needed, two first cables 80 connected to the main control circuit board 60 can be extended from their respective introduction holes 71 and connected to the corresponding middle pipe 90. At this time, by providing the introduction hole 71, the first cable 80 can pass through the inside of the back cover 70 and connect with the external middle pipe 90, and then be inserted back into the inside of the explosion-proof lamp through the introduction hole 71 again, so as to complete the electrical connection between the first cable 80 and the second cable 100 without disassembling the explosion-proof lamp, and ensure the sealing and explosion-proof of the explosion-proof lamp, which effectively improves the safety; at the same time, the explosion-proof lamp in this embodiment is quick and convenient to connect, and the work efficiency is improved; in addition, by providing the hook 75, the explosion-proof lamp can be conveniently mounted in various places, such as ceilings, walls, pipes, etc., so as to improve the applicability and flexibility of the explosion-proof lamp. Among them, a plurality of second fixing holes 76 are arranged at intervals along the circumference of the outer edge of the rear cover 70, and correspondingly, a second fixing groove 111 (or a through-hole structure) is arranged at a position of the lamp body 10 corresponding to the second fixing hole 76. At this time, the rear cover 70 and the lamp body 10 can be installed and fixed by screws, bolts, screws and other fasteners that penetrate the second fixing holes 76 and the second fixing groove 111 in sequence, and correspondingly, the fastener can be an anti-disassembly screw. It can be understood that in other embodiments of the utility model, the positions of the first fixing groove 12 and the second fixing groove 111 in the lamp body 10 can correspond to each other, or a through-hole structure can be directly arranged, in which case the front cover 20 can be fixed with the first fixing hole 211 and the through-hole structure by the fastener, and the rear cover 70 can be fixed with the second fixing hole 76 and the through-hole structure by the fastener.

[0054] Among them, the inner side wall of the lamp body 10 is also set as a flameproof joint surface, which can also cooperate with the back cover 70 to cool the leaked gas and isolate the explosion. Specifically, there may be some leaked gas inside the explosion-proof lamp, and these gases may be some dangerous gases. If they are not effectively handled, they may cause an explosion. Therefore, by setting a flameproof joint surface in the inner side wall of the rear chamber of the lamp body 10 and cooperating with the back cover 70, an isolated space can be formed for cooling the leaked gas. This can effectively prevent gas accumulation and reduce the temperature of the gas, thereby reducing the risk of explosion. At this time, when an explosion occurs inside the explosion-proof lamp, the flameproof joint surface between the inner side wall of the rear chamber and the back cover 70 can cool and extinguish the explosive gas leaked into the rear chamber when passing through the joint surface, thereby preventing the explosion from spreading to the explosive environment outside the explosion-proof lamp. At the same time, it can also isolate the explosion, that is, prevent the explosion from spreading inside the explosion-proof lamp, further improving the safety performance of the explosion-proof lamp.

[0055] Furthermore, in one embodiment of the utility model, when the explosion-proof lamp is actually produced, the fixed end of the first cable 80 is pre-connected directly to the power supply end of the main control circuit board 60 (not shown), and the free end of the first cable 80 extends to the outside of the explosion-proof lamp through the introduction hole 71. At this time, the explosion-proof lamp is not easy to be disassembled. When wiring, the first cable 80 can be directly connected to the middle pipe 90 outside the explosion-proof lamp. After the wiring is completed, the first cable 80 and the middle pipe 90 can be inserted into the back cover 70 of the explosion-proof lamp (that is, the accommodating cavity formed by the lamp body 10 and the back cover 70) through the introduction hole 71, and compressed and sealed by the sealing member 72 and the pressing member 73. At this time, the first cable 80 preset outside the explosion-proof lamp and the connected middle pipe 90 are inserted back into the explosion-proof lamp through the introduction hole 71, so that the middle pipe 90 can be sealed and protected by the explosion-proof lamp, thereby achieving a complete installation operation. That is to say, in this embodiment, the explosion-proof lamp can be shipped from the factory by extending the first cable 80 connected to the main control circuit board 60 out of the introduction hole 71. Then, when installing and wiring, the user does not need to disassemble the explosion-proof lamp, but directly connects the wires outside the explosion-proof lamp, and then puts it into the accommodating cavity inside the explosion-proof lamp after the connection is completed, and completes the sealing by pressing the sealing member 72 with the pressing member 73, so as to ensure the integrity of the explosion-proof lamp, and at the same time ensure safety while greatly simplifying the installation operation. It should be pointed out that in the reference figure of this embodiment, as shown in FIG. Figure 2 and Figure 3 The first cable 80 is not shown to be specifically connected to the main control circuit board 60. It can be understood that the Figure 2 and Figure 3 There is no specific limitation on the connection between the first cable 80 and the main control circuit board 60 in this embodiment. In actual production, the first cable 80 is specifically connected to the power supply terminal of the main control circuit board 60 .

[0056] Furthermore, in one embodiment of the utility model, connecting terminals are respectively provided on one end of the first cable 80 and the second cable 100 connected to the middle pipe 90, and crimping notches are provided on the connecting terminals. The outer wall of the middle pipe 90 is respectively provided with crimping grooves for crimping and fixing the first cable 80 and the second cable 100. The crimping notches on the connecting terminals correspond to the crimping grooves when the first cable 80 and the second cable 100 are accommodated in the middle pipe 90 for fixing. Specifically, a first connecting terminal 81 is provided at the free end of the first cable 80, and a first crimping notch 82 is provided on the first connecting terminal 81, and a second crimping notch 102 is provided on the free end of the second cable 100. At this time, a first crimping groove 91 and a second crimping groove 92 are correspondingly provided on the outer wall of the middle connecting pipe 90, wherein the first crimping groove 91 and the second crimping groove 92 are convenient for the user to press when connecting and fixing the first cable 80 and the second cable 100. At this time, when the first connecting terminal 81 and the second connecting terminal 101 are connected to the middle connecting pipe 90 in place, the user can directly press according to the first crimping groove 91 and the second crimping groove 92, so as to achieve a tight fit and fixation between the middle connecting pipe 90 and the first crimping notch 82 of the first connecting terminal 81 and the second crimping notch 102 of the second connecting terminal 101 after crimping. Specifically, when the first cable 80 and the second cable 100 are respectively accommodated in the middle pipe 90 for fixation, the first crimping notch 82 corresponds to the first crimping groove 91, and the second crimping notch 102 corresponds to the second crimping groove 92. At this time, when the user presses the first crimping groove 91 and the second crimping groove 92 with a pressing tool (such as pliers), the area of ​​the middle pipe 90 located at the first crimping groove 91 and the second crimping groove 92 can be deformed, so that the deformed middle pipe 90 can fit tightly with the first crimping groove 91 and the second crimping groove 92, thereby achieving the fixation of the first cable 80 and the second cable 100 by the middle pipe 90.

[0057] Further, in one embodiment of the present invention, the middle pipe 90 is generally a tubular structure, which can be a straight tube structure or a segmented structure with a narrow middle and wide ends or a wide middle and narrow ends. It should be noted that the outer diameter of the pipe 90 is smaller than the diameter of the introduction hole 71, so that the middle pipe 90 can freely pass through the introduction hole 71 on the rear cover 70. Figure 7 and Figure 8As shown, in one embodiment of the utility model, the middle pipe 90 is a segmented structure with a narrow middle section and wide sections at both ends. The first connection terminal 81 and the second connection terminal 101 extend from both ends into the middle pipe 90 until they stop after abutting against the middle narrow section. At this time, the first crimping notch 82 of the first connection terminal 81 corresponds to the first crimping groove 91, and the second crimping notch 102 of the second connection terminal 101 corresponds to the second crimping groove 92. Further, the inner and outer walls of the middle pipe 90 are respectively provided with a conductive layer and an insulating melting layer (not shown). The conductive layer can be provided at a local position in the inner wall of the middle pipe 90, which can save the material of the conductive layer, thereby achieving cost saving. For example, the conductive layer can be provided only at the middle narrow section position in the inner wall of the middle pipe 90. At this time, when the first cable 80 and the second cable 100 are connected to the middle pipe 90, the first connection terminal 81 and the second connection terminal 101 are respectively connected to the conductive layer at the middle narrow section position, thereby achieving electrical connection between the first cable 80 and the second cable 100. Correspondingly, it can be understood that the conductive layer can also be provided at all positions in the inner wall of the middle pipe 90. Among them, an insulating molten layer is provided on the outer wall of the middle pipe 90. When the first cable 80 and the second cable 100 are connected to the middle pipe 90, the insulating molten layer on the outer wall of the middle pipe 90 is melted by heat, so that after the insulating molten layer solidifies, it can effectively fix the first cable 80, the middle pipe 90 and the second cable 100 and prevent impurities such as water vapor from entering the interior to cause corrosion to the first cable 80, the middle pipe 90 and the second cable 100, thereby achieving effective protection between the first cable 80, the middle pipe 90 and the second cable 100. It should be pointed out that the conductive layer can be a layer of metal sheet on the inner wall of the middle pipe 90, and the middle pipe 90 is a three-layer structure of a conductive layer, an intermediate layer and an insulating molten layer. Of course, it can also be that the entire middle pipe 90 is made of metal material to form an integral conductive layer, and the middle pipe 90 is a two-layer structure of a conductive layer and an insulating molten layer. It is set according to actual use needs and is not specifically limited here.

[0058] Furthermore, in one embodiment of the present invention, since the middle pipe 90 is tubular, when the connecting terminals of the first cable 80 and the second cable 100 are respectively accommodated in the middle pipe 90, a rotation problem will occur. In order to avoid the rotation of the connecting terminals of the first cable 80 and the second cable 100 when they are connected to the middle pipe 90, in one embodiment of the present invention, the inner wall of the middle pipe 90 is respectively provided with a slide groove for sliding and accommodating the connecting terminals of the first cable 80 and the second cable 100. The crimping notch on the connecting terminal corresponds to the crimping groove when the connecting terminals of the first cable 80 and the second cable 100 slide to the end of the slide groove and stop sliding. Figure 7-Figure 10As shown, the inner wall of the middle pipe 90 is provided with sliding grooves at both ends of the connection terminals of the first cable 80 and the second cable 100. Of course, optionally, the inner wall of the middle pipe 90 can also be provided with sliding grooves at one end of the connection terminals of the first cable 80 and the second cable 100. Specifically, the inner wall of the middle pipe 90 is provided with two first sliding grooves 93 for accommodating both ends of the first connection terminal 81 and two second sliding grooves 94 for accommodating both ends of the second connection terminal 101. At this time, the first connection terminal 81 slides in the two first sliding grooves 93, and the second connection terminal 101 slides in the two second sliding grooves 94. Of course, optionally, in other embodiments of the utility model, the inner wall of the middle pipe 90 may also be provided with two or four limiting structures (limiting columns, limiting protrusions or limiting baffles 95) that fit the two ends of the connecting terminal, so as to limit the connecting terminal and prevent it from rotating. In this case, the limiting structure can be set at any position between the beginning and the end of the connecting terminal extending into the middle pipe 90, and the length of the limiting structure can be set to be less than or equal to the distance between the beginning and the end of the connecting terminal extending into the middle pipe 90. In this case, the connecting terminal can also slide back and forth between the limiting structures of the middle pipe 90 without rotating, and when sliding to the end and stopping sliding, the crimping notch on the connecting terminal corresponds to the crimping groove, so that a fixed connection between the connecting terminal and the middle pipe 90 can be achieved by crimping.

[0059] Further, in an embodiment of the present invention, referring to the above, the middle pipe 90 can also be a straight tube structure or a segmented structure with a wide middle and narrow ends. Fig. 9As shown, the slide groove for accommodating the connection terminal of the first cable 80 and the slide groove for accommodating the connection terminal of the second cable 100 are adjacent and connected, and the connection terminals of the first cable 80 and the second cable 100 fit each other when the connection terminals of the first cable 80 and the second cable 100 slide to the end of the slide groove and stop sliding. Furthermore, in a preferred embodiment of the utility model, the crimping notch on the connection terminal of the first cable 80 and the crimping notch on the connection terminal of the second cable 100 correspond to the same crimping groove when the first cable 80 and the second cable 100 are accommodated in the middle pipe 90 for fixing, that is, the crimping notch on the connection terminal of the first cable 80 and the crimping notch on the connection terminal of the second cable 100 are closely overlapped, and at this time, only one crimping notch is needed to fix the connection terminals of the first cable 80 and the second cable 100. Specifically, for the straight tube structure, the first slide groove 93 accommodating the first connecting terminal 81 and the second slide groove 94 accommodating the second connecting terminal 101 are adjacent to and connected to each other. At this time, when the first connecting terminal 81 slides to the end of the first slide groove 93 and the second connecting terminal 101 slides to the end of the second slide groove 94, the first connecting terminal 81 and the second connecting terminal 101 fit each other, and the first crimping notch 82 and the second crimping notch 102 fit tightly and overlap each other. The corresponding first crimping groove 91 and the second crimping groove 92 are the same crimping groove, thereby realizing direct electrical connection between the first cable 80 and the second cable 100. Accordingly, at this time, the inner wall of the middle connecting pipe 90 does not need to be provided with the conductive layer mentioned above. As for the segmented structure with a wide middle and narrow ends, the middle pipe 90 is initially a segmented structure with one end narrow and the other end wide. At this time, the user first extends the second cable 100 from the wide section position in the reverse direction and extends it from the narrow section position, so that the second connection terminal 101 on the second cable 100 is accommodated in the wide section position and abuts against the narrow section position. When the user needs to connect the first cable 80 to the middle pipe 90, the user then extends the first connection terminal 81 on the first cable 80 forward to the wide section position. When the first connection terminal 81 and the second connection terminal 81 are connected, the second connection terminal 101 on the second cable 100 is connected to the middle pipe 90. When the two connecting terminals 101 are both accommodated in the wide section and abut against the narrow section, the first terminal and the second terminal are first fixed by crimping the crimping grooves described above, and then the side of the wide section of the middle connecting pipe 90 away from the narrow section is squeezed, so that the wide section of the middle connecting pipe 90 is partially squeezed into a narrow section, realizing a segmented structure that is wide in the middle and narrow at both ends. At this time, since the two ends of the middle connecting pipe 90 are narrower, the first connecting terminal 81 and the second connecting terminal 101 are further fixed and sealed.

[0060] Furthermore, referring to the above, in another embodiment of the present invention, the middle pipe 90 can be a straight tube structure or a segmented structure that is wide in the middle and narrow at both ends, there is a certain interval between the slide groove for accommodating the connecting terminal of the first cable 80 and the slide groove for accommodating the connecting terminal of the second cable 100, and the connecting terminals of the first cable 80 and the second cable 100 are provided with avoidance notches (not shown in the figure), and the connecting terminals of the first cable 80 and the second cable 100 cross each other when the connecting terminals of the first cable 80 and the second cable 100 slide to the end of the slide groove and stop sliding. Furthermore, as a preferred example in this embodiment, the slide groove for accommodating the connection terminal of the first cable 80 and the slide groove for accommodating the connection terminal of the second cable 100 are respectively located at the four-equal points of the inner wall of the middle pipe 90. At this time, when the connection terminals of the first cable 80 and the second cable 100 slide to the end of the slide groove and stop sliding, the connection terminals of the first cable 80 and the second cable 100 are perpendicularly crossed with each other. At this time, since the connection terminals of the first cable 80 and the second cable 100 are provided with avoidance notches, the avoidance notches of the connection terminals of the first cable 80 accommodate the connection terminals of the second cable 100, and the avoidance notches of the connection terminals of the second cable 100 accommodate the connection terminals of the first cable 80. At this time, the connection terminals of the first cable 80 and the second cable 100 are interdigitated. Furthermore, as a preferred example in this embodiment, when the first cable 80 and the second cable 100 are accommodated in the middle pipe 90 for fixing, the crimping notches on the connection terminals of the first cable 80 and the crimping notches on the connection terminals of the second cable 100 both correspond to the same crimping groove. Specifically, for the straight tube structure, the first slide groove 93 for accommodating the first connection terminal 81 and the second slide groove 94 for accommodating the second connection terminal 101 are respectively located at the four equal parts of the middle pipe 90. At this time, when the first connection terminal 81 slides to the end of the first slide groove 93 and the second connection terminal 101 slides to the end of the second slide groove 94, the first connection terminal 81 and the second connection terminal 101 are perpendicular to each other. Correspondingly, the inner wall of the middle pipe 90 does not need to be provided with the conductive layer described above. For the segmented structure with a wide middle and narrow ends, it can generally refer to the above description, the difference is that at this time, the first connection terminal 81 and the second connection terminal 101 are perpendicular to each other, so it is not repeated here.

[0061] Furthermore, in one embodiment of the present invention, the first cable 80 and the second cable 100 each include at least two wires, each wire is provided with a connection terminal, and a baffle 95 is provided in the middle pipe 90 to separate at least two through chambers. The connection terminal on any wire of the first cable 80 and the connection terminal on the corresponding wire of the second cable 100 are accommodated in the same chamber of the middle pipe 90, and the connection terminal on each wire of the first cable 80 is accommodated in different chambers of the middle pipe 90. Specifically, referring to Figure 1 and Figure 6 As shown, in one example of the present invention, the first cable 80 and the second cable 100 each include four wires, and the four wires of the first cable 80 are each provided with a first connecting terminal 81, and the four wires of the second cable 100 are each provided with a second connecting terminal 101. At this time, four corresponding middle pipes 90 are required to complete the electrical connection between the first cable 80 and the second cable 100. Of course, in other examples of the present invention, the first cable 80 and the second cable 100 may also include two or three wires or other numbers of wires, which are arranged according to actual use needs and are not specifically limited here. Further, in order to reduce the number of middle pipes 90, it is also possible to provide a baffle 95 that separates at least two through chambers in the middle pipe 90, so that the middle pipe 90 can be divided into a plurality of through chambers, such as two, three or four, which are arranged according to actual use needs, the number of wires and the size requirements of the middle pipe 90, and are not specifically limited here. Reference Fig.10 As shown, when the middle pipe 90 separates two through chambers, it is only necessary to set a baffle plate 95 in the middle pipe 90. At this time, the two through chambers are semicircular chambers; when the middle pipe 90 needs to separate three through chambers, it is necessary to set three baffle plates 95 in the middle pipe 90, and the three baffle plates 95 can be adjacent to each other at 120°. At this time, the three through chambers are 120° fan-shaped chambers; when the middle pipe 90 needs to separate four through chambers, it is necessary to set two mutually perpendicular baffle plates 95 in the middle pipe 90. At this time, the four through chambers are 90° fan-shaped chambers. As a preferred example of the present invention, there are two through chambers. At this time, refer to Fig.10As shown, a baffle 95 is provided in the middle pipe 901 to separate two through chambers, and its slide groove is arranged in the inner wall of the middle pipe 90 adjacent to the baffle 95. The connection terminals of the first cable 80 and the second cable 90 are both fitted with the baffle 85 when the first cable 80 and the second cable 100 are accommodated in the middle pipe 90 for fixing. Specifically, at this time, the first connection terminal 81 of the first cable 80 and the second connection terminal 101 of the second cable 100 are both fitted with the baffle 95. At the same time, when the middle pipe 90 is a straight tube structure or a segmented structure with a wide middle and narrow ends, the end of the first connection terminal 81 can also collide with the end of the second connection terminal 101. At this time, it should be pointed out that the first crimping groove 91 and the second pressing groove are not the same crimping groove. Of course, the chute can also be set at the farthest position away from the baffle 95. At this time, the first connection terminal 81 of the first cable 80 and the second connection terminal 101 of the second cable 100 are both perpendicular to the baffle 95. It should be pointed out that the baffle 95 is provided with a notch corresponding to the position of the crimping groove on the outer wall of the middle pipe 90. The notch facilitates the user to crimp the crimping groove of the middle pipe 90 without damaging the baffle 95. When there are three or four through chambers, the chute can be set at any position in the inner wall of the middle pipe 90. It is set according to actual use needs and is not specifically limited here. Further, the first connection terminal 81 on any wire of the first cable 80 and the second connection terminal 101 on the corresponding wire of the second cable 100 are accommodated in the same chamber of the middle pipe 90, thereby realizing the electrical connection between the wires of the first cable 80 and the second cable 100, and the connection terminals on each wire of the first cable 80 are respectively accommodated in different chambers of the middle pipe 90, thereby realizing insulation isolation between each wire on the first cable 80. It should be pointed out that in this example, the pipe 90 is a three-layer structure of a conductive layer, an intermediate layer and an insulating molten layer, that is, a conductive layer is provided on the inner wall of each chamber, and the baffle 95 and the intermediate layer between each chamber are insulating materials, so that multiple wires on the first cable 80 and the second cable 100 can be electrically connected respectively in one pipe 90. Further, in a preferred example of the present invention, when the first cable 80 and the second cable 100 each include four wires, in order to consider the size requirements of the pipe 90, two pipes 90 with two through chambers can be provided to achieve electrical connection of the four wires in the first cable 80 and the second cable 100, thereby effectively reducing the number of two pipes 90.

[0062] Furthermore, in one embodiment of the present invention, the sealing member 72 is a sealing ring, the pressing member 73 is a locking nut, and the inner wall of the introduction hole 71 is provided with a thread that is threadedly connected with the locking nut. The locking nut is a hollow structure and is generally trumpet-shaped, wherein the outer ring of the locking nut is threadedly connected with the screw on the inner wall of the introduction hole 71, so that the locking nut can be inserted and removed from the introduction hole 71 by tightening or loosening, and the size of the inner ring of the locking nut is larger than the diameter of the second cable 100, so that it can be sleeved on the second cable 100. Before installing the explosion-proof lamp, the clamping member 73 and the sealing member 72 are sequentially sleeved on the second cable 100, and then the first cable 80 and the second cable 100 extending out of the explosion-proof lamp are fixedly connected to the middle pipe 90 respectively, and then the first cable 80 and the middle pipe 90 are inserted back into the accommodating cavity of the inner wall of the explosion-proof lamp through the introduction hole 71, and then the sealing member 72 is sleeved into the introduction hole 71, and further, by tightening the clamping member 73, the clamping member 73 begins to squeeze the sealing member 72, so that the sealing member 72 expands radially and fits and seals with the second cable 100, and at this time, the outer ring of the sealing member 72 is in close contact with the introduction hole 71, and the inner ring is in close contact with the second cable 100, thereby achieving the sealing of the explosion-proof lamp, ensuring the integrity of the explosion-proof lamp, ensuring safety and greatly simplifying the installation operation.

[0063] Among them, the cable connection method of the explosion-proof lamp is as follows: when the explosion-proof lamp leaves the factory, a first cable is preset, one end of which is connected to the main control circuit board and the other end extends out of the introduction hole of the back cover. The first cable is connected to the middle pipe outside the explosion-proof lamp, and the middle pipe is also connected to the second cable, and a sealing member and a pressing member are sleeved on the second cable. Then, the first cable and the middle pipe are inserted back into the internal accommodating cavity of the explosion-proof lamp through the introduction hole, and then the sealing member and the pressing member are placed in the introduction hole in turn, and the pressing member is tightened so that the pressing member presses the sealing member, causing the sealing member to expand radially and then fit and seal with the second cable.

[0064] In summary, the explosion-proof lamp in the above-mentioned embodiment of the utility model is provided with a first cable extending from the introduction hole of the back cover when the explosion-proof lamp leaves the factory, and then the middle pipe is connected to the free end of the first cable outside the lamp body and freely passes through the introduction hole and is inserted back into the explosion-proof lamp, and then the second cable is compressed and sealed by the sealing member and the pressing member provided in the introduction hole of the back cover, so that the electrical connection between the first cable and the second cable is completed without disassembling the explosion-proof lamp, and the sealing and explosion-proof of the explosion-proof lamp is ensured, which effectively improves the safety; at the same time, the explosion-proof lamp is quick and convenient to connect, which can effectively improve the work efficiency, and solves the problems of low sealing and efficiency caused by the need to disassemble and install the cables when connecting the existing explosion-proof lamps.

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0066] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the attached claims.

Claims

1. An explosion-proof lamp, characterized in that: include: A lamp body, a back cover connected to the rear opening of the lamp body, a first cable arranged in the back cover and electrically connected to a main control circuit board arranged in the lamp body, a middle pipe connected to the free end of the first cable outside the lamp body and then passing through the introduction hole of the back cover into the back cover, and a second cable with one end connected to the middle pipe and the other end used for connecting to a power source, wherein the first cable and the second cable connected to both ends of the middle pipe are electrically connected; A sealing member and a pressing member sleeved on the second cable are arranged in the introduction hole of the rear cover. The pressing member is connected to the inner wall of the introduction hole and is used to press the sealing member so that the sealing member expands radially and then fits and seals with the second cable.

2. The explosion-proof lamp according to claim 1, characterized in that: The first cable and the second cable are respectively provided with connecting terminals on one end connected to the middle connecting pipe, and the connecting terminals are provided with crimping notches. The outer wall of the middle connecting pipe is respectively provided with crimping grooves for crimping and fixing the first cable and the second cable. The crimping notches on the connecting terminals correspond to the crimping grooves when the first cable and the second cable are accommodated in the middle connecting pipe for fixation.

3. The explosion-proof lamp according to claim 2, characterized in that: The inner wall of the middle pipe is provided with sliding grooves for sliding and accommodating the connecting terminals of the first cable and the second cable, and the crimping notches on the connecting terminals correspond to the crimping grooves when the connecting terminals of the first cable and the second cable slide to the ends of the sliding grooves and stop sliding.

4. The explosion-proof lamp according to claim 3, characterized in that: The slide groove for accommodating the connection terminal of the first cable is adjacent to and connected to the slide groove for accommodating the connection terminal of the second cable, and the connection terminals of the first cable and the second cable fit together when the connection terminals of the first cable and the second cable slide to the end of the slide groove and stop sliding.

5. The explosion-proof lamp according to claim 3, characterized in that: The connecting terminals of the first cable and the second cable are provided with avoidance notches, and the connecting terminals of the first cable and the second cable cross each other when the connecting terminals of the first cable and the second cable slide to the ends of the slide slots and stop sliding.

6. The explosion-proof lamp according to claim 4 or 5, characterized in that: The crimping notch on the connecting terminal of the first cable and the crimping notch on the connecting terminal of the second cable both correspond to the same crimping groove when the first cable and the second cable are accommodated in the middle connecting pipe for fixing.

7. The explosion-proof lamp according to claim 3, characterized in that: The first cable and the second cable each include at least two wires, each wire is provided with the connecting terminal, a baffle is provided in the middle pipe to separate at least two through chambers, the connecting terminal on any wire of the first cable and the connecting terminal on the corresponding wire of the second cable are accommodated in the same chamber of the middle pipe, and the connecting terminal on each wire of the first cable is accommodated in different chambers of the middle pipe.

8. The explosion-proof lamp according to claim 7, characterized in that: A baffle is provided in the middle pipe to separate two through chambers, and the slide groove is arranged in a position adjacent to the baffle in the inner wall of the middle pipe. The connection terminals of the first cable and the second cable are both in contact with the baffle when the first cable and the second cable are accommodated and fixed in the middle pipe.

9. The explosion-proof lamp according to claim 1, characterized in that: The inner and outer walls of the middle pipe are respectively provided with a conductive layer and an insulating melting layer.

10. The explosion-proof lamp according to claim 1, characterized in that: The explosion-proof lamp also includes a front cover connected to the front end opening of the lamp body, a lampshade clamped between the front cover and the middle partition in the lamp body, a light source assembly and a junction box respectively arranged at the front and rear ends of the middle partition in the lamp body, and the main control circuit board arranged in the junction box and electrically connected to the light source assembly.

Images