An explosion-proof luminaire and method of assembly thereof

Abstract

The application belongs to the technical field of lamps, and particularly relates to an explosion-proof lamp and an assembling method thereof. The explosion-proof lamp comprises a mounting shell, an explosion-proof cover, a lighting assembly, a buffer pre-tightening assembly and a transmission assembly. The inside of the mounting shell is provided with a mounting cavity. The explosion-proof cover is arranged at the lower end of the mounting cavity and is used for isolating the mounting cavity from the outside to prevent the lamp from exploding. The lighting assembly is slidably arranged at the upper end of the mounting cavity and is used for lighting. The buffer pre-tightening assembly is used for buffering and pre-tightening to ensure the lighting stability of the lighting assembly. The transmission assembly is used for adjusting the position of the lighting assembly. The explosion-proof lamp has the advantages that when the lamp is replaced and assembled, the transmission assembly is arranged, the combined transmission mode of worm and screw transmission is used, the lighting assembly is freely extended, the self-locking property of the kneading transmission of the worm and the worm ensures the position stability of the worm as a whole when the telescopic rod is extended or retracted.

Description

Technical Field

[0001] This invention belongs to the field of lighting technology, and particularly relates to an explosion-proof lighting fixture and its assembly method. Background Technology

[0002] Explosion-proof lights are widely used in underground mining and chemical production. The difference between explosion-proof lights and ordinary lights lies in their operating environments. Used for lighting in production, warehousing, and rescue operations, explosion-proof lights ensure the safety of general lighting fixtures. Ordinary lights are prone to accidents in areas with high risk of explosion, hence the use of explosion-proof lights. The ignition temperature in an explosive atmosphere must be higher than the surface temperature of the explosion-proof light. This isolates hazardous gases or dust, preventing potential arcs, sparks, and high temperatures inside the light from igniting flammable gases and dust in the surrounding environment, thus meeting explosion-proof requirements.

[0003] Patent CN111425792A discloses an explosion-proof lighting fixture, comprising: an explosion-proof lighting fixture body, the explosion-proof lighting fixture body including a first explosion-proof lampshade, a second explosion-proof lampshade, an explosion-proof lamp, and an explosion-proof transparent plate, wherein the second explosion-proof lampshade is detachably disposed within the first explosion-proof lampshade, the explosion-proof lamp is disposed within the second explosion-proof lampshade, the explosion-proof transparent plate is disposed at the lower opening of the second explosion-proof lampshade, and a lower cover plate is provided at the lower end of the first explosion-proof lampshade, the lower cover plate being provided with a through hole corresponding to the second explosion-proof lampshade. The explosion-proof lighting fixture of the present invention comprises a first explosion-proof lampshade, a second explosion-proof lampshade, an explosion-proof lamp, and an explosion-proof transparent plate, wherein the second explosion-proof lampshade is detachably disposed within the first explosion-proof lampshade.

[0004] The above-mentioned equipment also has the following problems: when the working environment contains flammable gases or dust, the above-mentioned equipment lacks reasonable sealing to ensure that the lighting components are isolated from the outside world. When there is mechanical vibration in the working environment, the above-mentioned equipment lacks necessary vibration damping components to ensure the stability of the lighting point. Furthermore, due to the limitations of the size of the device itself and the installation environment, components that can adjust the position of the lighting end should be added to the explosion-proof lighting equipment to meet the adjustment of the lighting search position. Summary of the Invention

[0005] The purpose of this invention is to provide an explosion-proof lighting fixture and its assembly method to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the following technical solution is provided: an explosion-proof lighting fixture and its assembly method, wherein the equipment includes:

[0007] The mounting housing has an internal mounting cavity;

[0008] An explosion-proof cover is installed at the lower end of the mounting cavity to isolate the mounting cavity from the outside environment and protect the lamp from explosion.

[0009] The lighting assembly is slidably mounted at the upper end of the mounting cavity for illumination;

[0010] The shock-absorbing pre-tightening component is fixedly installed at the upper end of the mounting housing to absorb vibrations and ensure the lighting stability of the lighting component;

[0011] The transmission component, located above the shock-absorbing and pre-tensioning component, is used for adjusting the position of the lighting component;

[0012] The reflector is fixedly fastened in the middle of the mounting cavity.

[0013] In this technical solution, during the installation of the explosion-proof lighting fixture, the explosion-proof cover is first manually rotated and removed from the bottom of the mounting housing, followed by the removal of the reflector from the housing. Next, the lighting component's switch is manually turned off, and the required wattage light bulb is manually replaced. The lighting component's circuit is then closed. The reflector and explosion-proof cover are then sequentially reset and tightened, isolating the lighting component from the outside environment. The transmission component is then rotated, and through meshing and threaded transmission, it lowers the lighting component, adjusting the light intensity. Finally, the two damping and pre-tightening components are pulled, their positions secured by pins, and the springs within them are pulled, ensuring stable operation of the lighting component even when subjected to vibration.

[0014] In any of the above technical solutions, the transmission component further includes:

[0015] The first turbine is rotatably mounted on the upper end of the mounting housing;

[0016] The storage tube is fixedly connected to the lower end of the first turbine and rotates coaxially with the first turbine;

[0017] The threaded groove is fixedly formed on the inner ring end wall of the storage tube;

[0018] The telescopic rod has a threaded protrusion on its outer ring end face, which is fitted in the threaded groove and drives the thread through the threaded groove.

[0019] The transmission rod is rotatably mounted on the mounting housing, and a second turbine is fixedly mounted in its middle part. The second turbine meshes with the first turbine.

[0020] The transmission assembly also includes:

[0021] A rotating disk is fixedly connected to the front end of the transmission rod and rotates coaxially with the transmission rod. A handle is fixedly provided on the rotating disk, and the handle is used to drive the second turbine to rotate.

[0022] In this technical solution, manually rotating the handle drives the rotating disk and transmission rod to rotate, simultaneously causing the second turbine, fixedly connected to the middle of the transmission rod, to rotate. Because the second turbine and the first turbine are meshed, torque is transmitted to the first turbine, causing it to rotate. When the first turbine rotates, it drives the storage cylinder to rotate, which in turn causes the telescopic rod within it to rotate, thus moving the telescopic rod downwards and pushing the entire lighting assembly out of the mounting cavity. Furthermore, the meshing transmission between the second and first turbines is self-locking, ensuring that the position of the first turbine remains fixed during extension or retraction of the telescopic rod. The lighting assembly connected to the first turbine is stressed along the axis of the telescopic rod, while the second turbine is not stressed, ensuring the stability of the transmission and the safety of the entire device.

[0023] In any of the above technical solutions, the lighting component further includes:

[0024] The plastic housing has a threaded ring block for connecting to electricity fixed at its lower end wall;

[0025] The light bulb is housed within the power-connecting threaded ring block;

[0026] An isolation cover is fixedly installed at the lower end of the plastic shell;

[0027] The live wire connector is fixedly connected to the lower end wall of the plastic housing, and the upper end of the bulb abuts against the live wire connector.

[0028] The power supply is fixedly connected to the upper end of the plastic housing and is connected to the live wire contact ring and the live wire contact piece through a wire to supply power to the light bulb.

[0029] The lighting components also include:

[0030] Guide grooves are provided on the upper ends of the left and right end walls of the mounting cavity;

[0031] The movable plate is slidably set on the guide groove, and the lower end of the telescopic rod is fixedly connected to the middle of the movable plate, while the upper end of the power supply is fixedly connected to the lower end of the movable plate.

[0032] The spring-loaded hook is fixedly mounted on the upper end of the movable plate.

[0033] In this technical solution, when replacing lighting fixtures, a screw-in installation method is used. This ensures that during bulb replacement, the entire circuit is energized only when the top terminal of the bulb contacts the middle of the live wire terminal. This isolates the operator from the power supply during bulb replacement, preventing the risk of electric shock. Furthermore, the isolation cover protects the bulb from damage to the explosion-proof cover at the bottom in the event of a bulb explosion, ensuring the safety of the lighting equipment.

[0034] In any of the above technical solutions, the shock-absorbing preload component further includes:

[0035] The transmission housing is fixedly mounted on the upper end of the mounting housing;

[0036] An inclined slide groove is formed on the left and right end walls of the transmission housing, in which a slider is slidably provided;

[0037] A pull ring is fixedly installed at one end of the slider, and a through hole is fixedly opened in the middle.

[0038] The fixing claw is fixedly connected to the other end of the slider;

[0039] Positioning rings are evenly distributed on the outer end face of the transmission housing, and the positioning rings and pull rings can be fixed by pins;

[0040] The preload spring is fixedly connected between the spring hook and the fixed claw.

[0041] In this technical solution, the upper sliding block drives the pre-tightening spring to tighten the spring hook, thereby elastically securing the lighting component. When the lighting component is subjected to external vibration, the pre-tightening spring ensures the stability of the lighting component to the maximum extent. By pulling the pull ring, the tension length of the pre-tightening spring can be changed, thereby enabling different levels of tightening of the lighting component for different usage conditions, increasing the shock resistance of the entire device.

[0042] In any of the above technical solutions, a threaded annular groove is fixedly provided at the lower end of the mounting cavity, and a circular annular groove is fixedly provided at the upper end of the threaded annular groove. A sealing rubber ring is fixedly embedded in the annular groove for sealing and isolating the threaded annular groove from the outside.

[0043] Explosion-proof covers include:

[0044] The threaded ring has a thread at the upper end, which is threaded to the threaded ring groove, and the outer end of the threaded ring has a rotating handle for manual rotation of the threaded ring.

[0045] An electrostatic filter is fixedly installed on the annular end wall of the threaded ring to attract static electricity from the threaded ring.

[0046] In this technical solution, when the rotating handle is tightened, the upper end of the threaded ring is pressed against and squeezed against the sealing ring. At this time, the sealing ring completes the seal between the explosion-proof cover and the outside world, thereby ensuring that dust and gas from the outside will not enter the installation cavity, preventing flammable gases from entering the installation cavity and causing electrical fires to the lighting components, which could lead to equipment damage. In addition, the electrostatic filter can adsorb static electricity in the installation cavity, ensuring that the lighting components are always in a safe and stable working environment during operation.

[0047] A method for assembling explosion-proof lighting fixtures:

[0048] Step 1: Manually rotate the handle to unscrew the explosion-proof cover from the bottom of the mounting housing, and then remove the reflector from the mounting housing;

[0049] Step 2: Turn off the switch of the lighting unit, manually unscrew the isolation cover, and then screw the bulb into the power connection threaded ring to turn on the bulb;

[0050] Step 3: Reset the isolation cover and reflector in sequence, and then tighten the rotating handle;

[0051] Step 4: Rotate the transmission assembly. The transmission assembly drives the lighting assembly to move downward through meshing and threaded transmission, thereby adjusting the light of the lighting assembly.

[0052] Step 5: Finally, pull both pull rings to tighten the preload springs, and then use the pins to fix the pull rings to the positioning rings to ensure that the lighting components can still work stably when subjected to vibration.

[0053] The beneficial effects of this invention are as follows: When replacing and assembling lamps, the transmission components utilize a combination of worm gear and thread transmission to achieve free extension of the lighting components. Furthermore, the engagement transmission between the second and first worm gears is self-locking, ensuring the overall position of the first worm gear remains stable when the telescopic rod extends or retracts. The lighting components connected to the first worm gear are stressed along the axis of the telescopic rod, while the second worm gear is not stressed, ensuring transmission stability and the safety of the entire device. Moreover, when replacing lighting fixtures, the screw-in installation method ensures that the circuit is energized only when the bulb's top contact point contacts the center of the live wire contact piece. This isolates the operator from the power supply, preventing electric shock and ensuring the safe use of the lighting equipment. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the internal structure of the present invention;

[0055] Figure 2 In this invention Figure 1 A schematic diagram of the central lighting components;

[0056] Figure 3 yes Figure 1 Diagram at point AA;

[0057] Figure 4 This is a schematic diagram of the transmission component in this invention;

[0058] Figure 5 This is a three-dimensional schematic diagram of the transmission component in this invention;

[0059] Figure 6 This is a three-dimensional schematic diagram of the shock-absorbing pre-tightening component in this invention.

[0060] The reference numerals in the figure are as follows: 100, mounting housing; 101, mounting cavity; 102, threaded ring groove; 103, sealing ring; 200, explosion-proof cover; 201, threaded ring; 202, rotating handle; 203, electrostatic filter; 300, lighting assembly; 301, plastic housing; 302, power-connecting threaded ring block; 303, light bulb; 304, isolation cover; 305, live wire connector; 306, power supply; 307, movable plate; 308, guide groove; 309 400. Spring hook; 401. Shock-absorbing pre-tensioning assembly; 402. Transmission housing; 403. Angled slide; 404. Slider; 405. Pull ring; 406. Fixed claw; 407. Positioning ring; 408. Pre-tensioning spring; 500. Transmission assembly; 501. First turbine; 502. Storage cylinder; 503. Threaded groove; 504. Telescopic rod; 505. Second turbine; 506. Transmission rod; 507. Rotating disk; 508. Handle; 600. Reflector. Detailed Implementation

[0061] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0062] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0063] like Figure 1 As shown, this embodiment provides an explosion-proof lighting fixture and its assembly method, wherein the equipment includes:

[0064] Mounting housing 100, the interior of which is provided with mounting cavity 101;

[0065] An explosion-proof cover 200 is installed at the lower end of the mounting cavity 101 to isolate the mounting cavity 101 from the outside world and provide explosion protection for the lamp.

[0066] The lighting assembly 300 is slidably disposed at the upper end of the mounting cavity 101 for lighting purposes;

[0067] The shock-absorbing pre-tightening component 400 is fixedly installed at the upper end of the mounting housing 100 to absorb shocks and ensure the lighting stability of the lighting component 300;

[0068] The transmission component 500 is located at the upper end of the shock-absorbing and pre-tensioning component 400 and is used for adjusting the position of the lighting component 300;

[0069] The reflector 600 is fixedly fastened in the middle of the mounting cavity 101.

[0070] In this technical solution, during the installation of the explosion-proof lighting fixture, firstly, the explosion-proof cover 200 is manually rotated and removed from the lower end of the mounting housing 100. Then, the reflector 600 is removed from the mounting housing 100. Next, the switch of the lighting component 300 is manually turned off, and the required wattage lighting bulb is manually replaced. Then, the circuit of the lighting component 300 is closed. Next, the reflector 600 and the explosion-proof cover 200 are sequentially reset and the explosion-proof cover 200 is tightened to isolate the lighting component 300 from the outside environment. Then, the transmission component 500 is rotated. The transmission component 500 drives the lighting component 300 downward through meshing and threaded transmission to adjust the light of the lighting component 300. Finally, the two damping and pre-tightening components 400 are pulled, and their positions are fixed by pins, and the springs inside are pulled to ensure that the lighting component 300 can still work stably when subjected to vibration.

[0071] like Figure 3 , Figure 4 , Figure 5 As shown,

[0072] The transmission assembly 500 includes:

[0073] The first turbine 501 is rotatably mounted on the upper end of the mounting housing 100;

[0074] The storage tube 502 is fixedly connected to the lower end of the first turbine 501 and rotates coaxially with the first turbine 501;

[0075] The threaded groove 503 is fixedly formed on the inner ring end wall of the storage cylinder 502;

[0076] The telescopic rod 504 has a threaded protrusion on its outer ring end face, which is sleeved in the threaded groove 503 and drives the threaded groove 503.

[0077] A transmission rod 506 is rotatably mounted on the mounting housing 100, and a second turbine 505 is fixedly mounted in its middle part. The second turbine 505 is meshed with the first turbine 501 for transmission.

[0078] The transmission assembly 500 also includes:

[0079] A rotating disk 507 is fixedly connected to the front end of the transmission rod 506 and rotates coaxially with the transmission rod 506. A handle 508 is fixedly provided on the rotating disk 507, and the handle 508 is used to drive the second turbine 505 to rotate.

[0080] In this technical solution, the manual rotating handle 508 drives the rotating disk 507 and the transmission rod 506 to rotate, and simultaneously drives the second turbine 505, which is fixedly connected to the middle of the transmission rod 506, to rotate. Because the second turbine 505 and the first turbine 501 are meshed, torque is transmitted to the first turbine 501, causing it to rotate. When the first turbine 501 rotates, it drives the storage cylinder 502 to rotate. The rotation of the storage cylinder 502 causes the telescopic rod 504 within it to rotate, which in turn drives the telescopic rod 504 to move downwards, pushing the lighting assembly 300 out of the mounting cavity 101. Furthermore, the meshing transmission between the second turbine 505 and the first turbine 501 is self-locking, ensuring that the position of the first turbine 501 remains fixed when the telescopic rod 504 extends or retracts. The lighting assembly 300 connected to it is subjected to force along the axis of the telescopic rod 504, while the second turbine 505 is not subjected to force, ensuring the stability of the transmission and the safety of the entire device.

[0081] In a preferred embodiment of the present invention:

[0082] like Figure 2 As shown, specifically,

[0083] Lighting component 300 includes:

[0084] The plastic housing 301 has an electrical threaded ring block 302 fixedly provided on its lower end wall;

[0085] The light bulb 303 is disposed in the power-connecting threaded ring block 302;

[0086] The isolation cover 304 is fixedly installed at the lower end of the plastic housing 301;

[0087] The live wire connector 305 is fixedly connected to the lower end wall of the plastic housing 301, and the upper end of the bulb 303 abuts against the live wire connector 305.

[0088] The power supply 306 is fixedly connected to the upper end of the plastic housing 301 and is connected to the power threaded ring block 302 and the live wire contact piece 305 through a wire, and is used to supply power to the bulb 303.

[0089] The lighting assembly 300 also includes:

[0090] Guide grooves 308 are provided on the upper ends of the left and right end walls of the mounting cavity 101;

[0091] The movable plate 307 is slidably mounted on the guide groove 308, and the lower end of the telescopic rod 504 is fixedly connected to the middle of the movable plate 307, while the upper end of the power supply 306 is fixedly connected to the lower end of the movable plate 307.

[0092] The spring hook 309 is fixedly mounted on the upper end of the movable plate 307.

[0093] In this technical solution, when replacing the lighting fixtures, a screw-in installation method is adopted. This ensures that during the replacement of the bulb 303, the entire circuit is energized only when the top terminal of the bulb 303 contacts the middle of the live wire terminal 305. This ensures that the operator is isolated from the power supply when replacing the bulb 303, preventing the risk of electric shock. Furthermore, the isolation cover 304 protects the bulb 303, preventing damage to the explosion-proof cover 200 at the lower end in the event of the bulb 303 exploding, thus ensuring the safety of the lighting equipment.

[0094] In a preferred embodiment of the present invention:

[0095] like Figure 1 and Figure 6 As shown, specifically,

[0096] The shock absorption preload assembly 400 includes:

[0097] The transmission housing 401 is fixedly mounted on the upper end of the mounting housing 100;

[0098] An inclined groove 402 is formed on the left and right end walls of the transmission housing 401, wherein a slider 403 is slidably provided.

[0099] A pull ring 404 is fixedly installed at one end of a slider 403, and a through hole is fixedly opened in the middle.

[0100] The fixing claw 405 is fixedly connected to the other end of the slider 403;

[0101] Positioning rings 406 are evenly distributed on the outer end face of the transmission housing 401, and positioning rings 406 and pull rings 404 can be fixed by pins;

[0102] The preload spring 407 is fixedly connected between the spring hook 309 and the fixing claw 405.

[0103] In this technical solution, the upper sliding block 403 drives the pre-tension spring 407 to tighten the spring hook 309, thereby elastically securing the lighting component 300. When the lighting component 300 is subjected to external vibration, the pre-tension spring 407 ensures the stability of the lighting component 300 to the maximum extent. By pulling the pull ring 404, the extension length of the pre-tension spring 407 can be changed, thereby enabling different levels of tightening of the lighting component 300 for different usage conditions, increasing the shock resistance of the entire device.

[0104] In a preferred embodiment of the present invention:

[0105] like Figure 1 As shown, specifically,

[0106] A threaded annular groove 102 is fixedly provided at the lower end of the mounting cavity 101, and a circular annular groove is fixedly provided at the upper end of the threaded annular groove 102. A sealing ring 103 is fixedly embedded in the annular groove to seal and isolate the threaded annular groove 102 from the outside.

[0107] Explosion-proof cover 200 includes:

[0108] The threaded ring 201 has a thread at its upper end, which is threaded to the threaded ring groove 102, and the outer end of the threaded ring 201 has a rotating handle 202 for manual rotation of the threaded ring 201.

[0109] The electrostatic filter 203 is fixedly installed on the annular end wall of the threaded ring 201 to attract static electricity on the threaded ring 201.

[0110] In this technical solution, when the rotating handle 202 is tightened, the upper end of the threaded ring 201 is pressed against and squeezed against the sealing ring 103. At this time, the sealing ring 103 completes the seal between the explosion-proof cover 200 and the outside world, thereby ensuring that dust and gas from the outside will not enter the installation cavity 101, and preventing flammable gas from entering the installation cavity 101 and causing an electric fire with the lighting component 300, which would damage the equipment. In addition, the electrostatic filter 203 can adsorb the static electricity in the installation cavity 101, ensuring that the lighting component 300 is always in a safe and stable working environment during operation.

[0111] A method for assembling explosion-proof lighting fixtures:

[0112] Step 1: Manually rotate the rotating handle 202 to unscrew the explosion-proof cover 200 from the lower end of the mounting housing 100, and then remove the reflector 600 from the mounting housing 100.

[0113] Step 2: Turn off the switch of the lighting component 300, manually unscrew the isolation cover 304, and then screw the bulb 303 into the power connection threaded ring block 302 to turn on the bulb 303;

[0114] Step 3: Reset the isolation cover 304 and reflector 600 in sequence, and then tighten the rotating handle 202;

[0115] Step 4: Rotate the transmission assembly 500. The transmission assembly 500 drives the lighting assembly 300 to move downward through meshing and threaded transmission, thereby adjusting the light of the lighting assembly 300.

[0116] Step 5: Finally, pull the two pull rings 404 to tighten the pre-tension spring 407, and then use the pin to fix the pull rings 404 and the positioning ring 406 to ensure that the lighting assembly 300 can still work stably when subjected to vibration.

[0117] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An explosion-proof lighting fixture, characterized in that, include: Mounting housing (100), wherein the interior of the mounting housing (100) is provided with mounting cavity (101); An explosion-proof cover (200) is provided at the lower end of the mounting cavity (101) to isolate the mounting cavity (101) from the outside world and provide explosion protection for the lamp. An illumination assembly (300) is slidably disposed at the upper end of the mounting cavity (101) for illumination; A shock-absorbing pre-tightening assembly (400) is fixedly disposed at the upper end of the mounting housing (100) to absorb shocks and ensure the lighting stability of the lighting assembly (300); A transmission assembly (500) is disposed at the upper end of the shock-absorbing pretensioning assembly (400) for adjusting the position of the lighting assembly (300); The reflector (600) is fixedly fastened in the middle of the mounting cavity (101); The transmission assembly (500) includes: a first turbine (501) rotatably disposed at the upper end of the mounting housing (100); The storage tube (502) is fixedly connected to the lower end of the first turbine (501) and rotates coaxially with the first turbine (501); A threaded groove (503) is fixedly formed on the inner ring end wall of the storage cylinder (502); The telescopic rod (504) has a threaded protrusion on its outer ring end face, which is sleeved in the threaded groove (503) and threadedly driven with the threaded groove (503); A transmission rod (506) is rotatably mounted on the mounting housing (100), and a second turbine (505) is fixedly mounted in its middle. The second turbine (505) meshes with the first turbine (501). The shock-absorbing preload assembly (400) includes: a transmission housing (401), which is fixedly disposed on the upper end of the mounting housing (100); An inclined groove (402) is provided on the left and right end walls of the transmission housing (401), wherein a slider (403) is slidably provided; A pull ring (404) is fixedly disposed at one end of the slider (403), and a through hole is fixedly opened in the middle; A fixing claw (405) is fixedly connected to the other end of the slider (403); Positioning rings (406) are evenly distributed on the outer end face of the transmission housing (401), and the positioning rings (406) and the pull rings (404) can be fixed by pins; A preload spring (407) is fixedly connected between the spring hook (309) and the fixed claw (405); A threaded annular groove (102) is fixedly provided at the lower end of the mounting cavity (101), and a circular annular groove is fixedly provided at the upper end of the threaded annular groove (102). A sealing ring (103) is fixedly embedded in the annular groove for sealing and isolating the threaded annular groove (102) from the outside. The explosion-proof cover (200) includes: a threaded ring (201), with a thread at the upper end, which is threadedly connected to the threaded annular groove (102), and the outer end of the threaded ring (201) is provided with a rotating handle (202) for manual rotation of the threaded ring (201); An electrostatic filter (203) is fixedly disposed on the annular end wall of the threaded ring (201) to attract static electricity on the threaded ring (201).

2. The explosion-proof lighting fixture according to claim 1, characterized in that, The transmission assembly (500) further includes: a rotating disk (507) fixedly connected to the front end of the transmission rod (506) and rotating coaxially with the transmission rod (506). A handle (508) is fixedly provided on the rotating disk (507), and the handle (508) is used to drive the second turbine (505) to rotate.

3. The explosion-proof lighting fixture according to claim 1, characterized in that, The lighting assembly (300) includes: a plastic housing (301), with a power-connecting threaded ring block (302) fixedly provided at its lower end wall; A light bulb (303) is disposed in the power-connecting threaded ring block (302); An isolation cover (304) is fixedly installed at the lower end of the plastic housing (301); The live wire connector (305) is fixedly connected to the lower end wall of the plastic housing (301), and the upper end of the bulb (303) abuts against the live wire connector (305); The power supply (306) is fixedly connected to the upper end of the plastic housing (301) and is connected to the power-connecting threaded ring block (302) and the live wire connecting piece (305) through a wire, and is used to supply power to the bulb (303).

4. The explosion-proof lighting fixture according to claim 3, characterized in that, The lighting assembly (300) further includes: a guide groove (308) disposed on the upper end of the left and right end walls of the mounting cavity (101); The movable plate (307) is slidably disposed on the guide groove (308), and the lower end of the telescopic rod (504) is fixedly connected to the middle part of the movable plate (307), and the upper end of the power supply (306) is fixedly connected to the lower end of the movable plate (307); The spring hook (309) is fixedly mounted on the upper end of the movable plate (307).

5. A method for assembling the explosion-proof lighting fixture of claim 1, characterized in that: Step 1: Manually rotate the rotating handle (202) to unscrew the explosion-proof cover (200) from the lower end of the mounting housing (100), and then remove the reflector (600) from the mounting housing (100); Step 2: Turn off the switch of the lighting component (300), manually unscrew the isolation cover (304), and then screw the bulb (303) into the power connection threaded ring (302) to turn on the bulb (303); Step 3: Reset the isolation cover (304) and reflector (600) in sequence, and then tighten the rotating handle (202); Step 4: Rotate the transmission assembly (500). The transmission assembly (500) drives the lighting assembly (300) to move down through meshing and threaded transmission, thereby adjusting the light of the lighting assembly (300). Step 5: Finally, pull the two pull rings (404) to tighten the pre-tension spring (407), and then use the pin to fix the pull ring (404) and the positioning ring (406) to ensure that the lighting assembly (300) can still work stably when subjected to vibration.

Images