An explosion-proof lamp for a relatively thin helicopter platform

Abstract

The present invention discloses a thinner explosion-proof lamp for a helicopter platform, which includes a fixed seat. An installation groove is provided on the fixed seat, and a light-transmitting cover is installed in the installation groove. The outer wall of the light-transmitting cover and the inner wall of the installation groove are sealed by pouring a first sealant; a first groove body, a wire passing hole, and a threaded hole are provided on the fixed seat. A first screw is inserted into the first groove body and passes through the fixed seat and then is assembled and fixed with the transparent cover; a wiring cavity, a dividing part, and a light source cavity are provided in the transparent cover. The dividing part is adhesively fixed to the aluminum substrate through an adhesive layer; a light source is provided on the aluminum substrate, and a clamping groove is provided between the aluminum substrate and the light source. The clamping groove is clamped and fixed with a clamping part, and the clamping part is arranged on a light guide column. The light guide column is installed in the light source cavity; a light guide cavity is provided on the light guide column, and the light source is installed in the light guide cavity; one end of a wire passes through the wire hole and is connected to the light source for conduction, and the other end of the wire is connected to the power output end for conduction.

Description

Technical Field

[0001] The present invention relates to explosion-proof lamps, and particularly to a relatively thin explosion-proof lamp for helicopter platforms. Background Art

[0002] The explosion-proof lamps for helicopter platforms include H lamps and C lamps, which are special lamps installed on helicopter platforms to provide light signal indication for helicopter takeoff and landing. It is required that the total height of the lamps does not exceed 25 mm. Since the helicopter will park on the lamp body, the lamps should be able to bear the weight of the aircraft. The light distribution should meet the requirements of Table 1. The difficulty of this product lies in the key points of light distribution: the requirements of Table 1, that is, the top light intensity of the lamp is low and the horizontal plane light intensity is high.

[0003] Table 1:

[0004]

[0005] At the same time, this product is applicable to Zone 1 explosive gas environment of Group II C. According to the explosion-proof standard, the LED light source cannot be placed in the increased safety cavity.

[0006] The previous domestic method was to add a lens to the convex light-transmitting cover. The disadvantage of this method is that the lens will be made very high and the top will be thick. In order to meet the requirement that the product height does not exceed 25 mm, the height of the housing will be reduced, which affects the design of other structures of the product. Moreover, such a lens will partially change the light intensity and the light irradiation direction of the LED light source, but it is very difficult to make the light intensity from 0° to 90° fully meet the requirements of Table 1, especially under the 25 mm height limit.

[0007] The foreign market method is to use a lens plus a light-transmitting cover. In order to solve the problem of too high top light intensity, paint or stickers are applied on the upper surface of the light-transmitting cover. The defects of this method are that the paint or stickers are easy to wear and affect the aesthetics of the product. Coupled with the difficulty of the light distribution itself, it is very difficult to meet the requirements of Table 1.

[0008] Therefore, the applicant proposes a light guide column and a relatively thin explosion-proof lamp for helicopter platforms. Through the design of the light guide column, it can meet the key points of light distribution in the design standard, and at the same time has high strength and is applicable to Zone 1 explosive gas environment of Group II C. Summary of the Invention

[0009] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a relatively thin explosion-proof lamp for helicopter platforms.

[0010] To achieve the above object, the present invention provides a relatively thin explosion-proof lamp for helicopter platforms, including a fixed seat, an installation groove is provided on the fixed seat, a light-transmitting cover is installed in the installation groove, and a first sealant is used for potting between the outer wall of the light-transmitting cover and the inner wall of the installation groove;

[0011] The fixed seat is provided with a first groove, a wire passing hole, and a threaded hole. The first screw is inserted into the first groove and passes through the fixed seat and then is assembled and fixed with the transparent cover.

[0012] The transparent cover is provided with a wiring cavity, a dividing part, and a light source cavity. The dividing part is adhesively bonded and fixed to the aluminum substrate through an adhesive layer.

[0013] The aluminum substrate is provided with a light source. A clamping groove is arranged between the aluminum substrate and the light source. The clamping groove is clamped and fixed with a clamping part. The clamping part is arranged on the light guide column. The light guide column is installed in the light source cavity.

[0014] The light guide column is provided with a light guiding cavity. The light source is installed in the light guiding cavity.

[0015] One end of the wire passes through the wire hole and is connected to the light source for conduction. The other end of the wire is connected to the power output end for conduction.

[0016] Preferably, the wire hole is sealed by pouring a third sealant, and the end of the threaded hole is sealed by pouring a second sealant.

[0017] Preferably, the transparent cover and the bottom surface of the installation groove are tightly sealed by a sealing ring.

[0018] Preferably, the surface of the transparent cover is provided with texturing. The texturing includes a frosted part with a frosted effect in the middle and multiple groups of concave and convex circles on the outside.

[0019] Preferably, the diameter of the frosted part is 0.55 - 0.6 of the diameter of the top surface of the transparent cover. The interval of the concave and convex circles is 0.13 - 0.16 of the diameter of the frosted part. And the concave and convex circles are evenly distributed at intervals in the diameter direction on the top surface of the transparent cover, with the texture protruding from the top surface of the transparent cover and the texture recessed into the top surface of the transparent cover.

[0020] Preferably, the aluminum substrate and the bottom surface of the installation groove form an explosion-proof joint surface. The combined length L of the explosion-proof joint surface is ≥ 9.5 mm, and the explosion-proof gap ic ≤ 0.04 mm.

[0021] Preferably, the adhesive bonding surface length of the adhesive layer is ≥ 4 mm, and the thickness is 0.2 mm.

[0022] Preferably, the top of the light guide column is provided with a V-shaped groove, and the bottom is provided with a light guiding cavity. The bottom of the V-shaped groove is the connection point. The diffusing arc surface is arranged on the top surface of the light guiding cavity. The light source is installed in the light guiding cavity, and a concentrating arc surface is provided directly above the light source on the diffusing arc surface.

[0023] Preferably, the connection point is located at the geometric center of the concentrating arc surface in the top view direction of the light guide column.

[0024] Preferably, the light guide column is made of a transparent material.

[0025] The beneficial effects of the present invention are as follows:

[0026] The present invention has a simple structure and can meet the parameter requirements in Table 1. In addition, the overall height is relatively low, meeting the current requirements for standard height, and the manufacturing cost is low, which can effectively improve the competitiveness of enterprises.

[0027] The light-transmitting cover of the present invention has a relatively high strength and can fully bear the weight of a helicopter.

[0028] The present invention utilizes the upper and lower surfaces of the LED light source to form an explosion-proof structure of "d eⅡC" for explosion isolation + increased safety. This is a first in traditional practices. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 FIG. is a schematic structural diagram of a specific embodiment of a relatively thin explosion-proof lamp for a helicopter platform according to the present invention.

[0030] Figure 2 FIG. is a top view structure of the light-transmitting cover of a specific embodiment of a relatively thin explosion-proof lamp for a helicopter platform according to the present invention.

[0031] Figure 3 FIG. is a schematic structural diagram of a light guide column of a specific embodiment of a relatively thin explosion-proof lamp for a helicopter platform according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0032] The present invention will be further described below in conjunction with the drawings and embodiments:

[0033] Refer to Figures 1-3 , a relatively thin explosion-proof lamp for a helicopter platform, including a mounting surface 100 and a fixing seat 200. A fixing groove 101 is provided on the mounting surface 100, and the fixing seat 200 is fixed in the fixing groove 101;

[0034] An installation groove 210 is provided on the fixing seat 200, and a light-transmitting cover 310 is installed in the installation groove 210. The outer wall of the light-transmitting cover 310 and the inner wall of the installation groove 210 are sealed by pouring a first sealant 510, so as to obtain a seal between the side wall of the light-transmitting cover 310 and the inner side wall of the installation groove 210;

[0035] A first groove 201, a wire passing hole 202, and a threaded hole 203 are provided on the fixing seat 200. A first screw 610 is inserted into the first groove 201 and passes through the fixing seat 200 and then is threadedly engaged with the transparent cover 310 for assembly and fixation, so as to fix the fixing seat and the light-transmitting cover;

[0036] A wiring cavity 311, a dividing part 315, and a light source cavity 312 are provided inside the transparent cover 310. The dividing part 315 is adhesively fixed to the aluminum substrate 330 through an adhesive layer 520. Preferably, the adhesive layer 520 uses 9311T adhesive, the length of the adhesive joint surface is ≥ 4 mm, and the thickness is 0.2 mm.

[0037] A light source 340 is provided on the aluminum substrate 330. Preferably, the light source 340 can be an LED lamp bead, an LED light bar, an LED light source, etc.

[0038] A clamping groove 331 is provided between the aluminum substrate 340 and the light source 340. The clamping groove 331 is fixedly clamped with a clamping part 353. The clamping part 353 is provided on the light guide column 350. Moreover, a V-shaped groove 352 and a light-diffusing arc surface 354 are also provided on the light guide column 350. The light guide column 350 is installed in the light source cavity 312.

[0039] The second screw 620 passes through the aluminum substrate 330 and is fixedly assembled with the threaded hole 203 on the fixed seat 200 through screw-thread engagement to fix the aluminum substrate 330 on the fixed seat 200.

[0040] One end of the wire 410 passes through the wire hole 202 and is connected to the light source 340 for conduction to make the light source emit light. The other end of the wire 410 is connected to the power output end for conduction. The power supply can be a battery, mains power, etc.

[0041] The wire hole 202 is sealed by pouring the third sealant 550, and the end of the threaded hole 203 is sealed by pouring the second sealant 540 to seal the wire hole 202 and the threaded hole 203.

[0042] The transparent cover 310 and the bottom surface of the installation groove 210 are tightly sealed through a sealing ring 320.

[0043] An explosion-proof joint surface 530 is provided between the aluminum substrate 330 and the bottom surface of the installation groove. The joint length L of the explosion-proof joint surface 530 is ≥ 9.5 mm, and the explosion-proof gap ic ≤ 0.04 mm.

[0044] The transparent cover and the light guide column are made of transparent materials.

[0045] The first sealant, the second sealant, and the third sealant can be resin.

[0046] See Figure 3 , at the bottommost part of the V-shaped groove 352 of the light guide column 350 is a connection point 356. The light-diffusing arc surface 354 is arranged on the top surface of the light guide cavity 351. The light source 340 is installed in the light guide cavity 351, and a condensing arc surface 355 is provided above the light source 340 and on the light-diffusing arc surface 354.

[0047] The connection point 356 is located at the geometric center of the light - collecting arc surface 355 in the top - view direction of the light - guiding column ( Figure 3 for reference). This design enables the V - shaped groove to evenly reflect light from the two side edges of the V - shaped groove.

[0048] During use, the light - diffusing arc surface diffuses the light, while the light - collecting arc surface 355 collects and transmits part of the light to the connection point 356, and finally exports it through the V - shaped groove 352. Thus, both the transmission angle and intensity of the light meet the design requirements. Moreover, through the design of the light - guiding column, the thickness of the entire explosion - proof lamp can be effectively reduced, enabling the light - transmitting cover to increase its thickness. That is, it not only reduces the thickness of the explosion - proof lamp but also increases the strength of the light - transmitting cover, enabling the explosion - proof lamp to withstand the pressure of a helicopter.

[0049] The included angle between the two side walls of the V - shaped groove 352 is preferably 90°. This design enables the light intensity from the middle to both sides to be almost the same from 0 to 90°.

[0050] The main innovation of this structure lies in using the upper and lower surfaces of the light source to make a "d eⅡC" explosion - proof structure. The specific method is as follows: The upper surface of the aluminum substrate and the light - transmitting cover are fixed by gluing, with a gluing length of 4 mm. The lower surface of the aluminum substrate and the fixing base have a flat joint surface, so the light - source cavity meets the explosion - proof structure of the flame - proof type "d". Figure 1 As shown: An increased - safety type "e" wiring cavity is composed of an aluminum substrate, a fixing base, a light - transmitting cover, and a sealing ring. For the increased - safety cavity, there is no limit of less than 20 mm for the cable to be led out. The overall height of the product does not exceed 25 mm, meeting the design requirements.

[0051] The conventional method for LED explosion - proof lamps is to make the light - source cavity into a flame - proof type "d" structure. The LED light source is only fixed on the housing as an electrical component, and the housing and the light - transmitting cover are glued, with a gluing length of at least 3 mm. (See GB3836.2 6.3 Width of the glued joint surface); The cable for the light - source inlet is sealed with glue, with a sealing length of not less than 20 mm.

[0052] If following the conventional method, when the light - transmitting cover and the housing are glued, the light - source cavity becomes larger, and the gluing length is at least 6 mm. The casting - in - seal length for the cable to be led out is not less than 20 mm. The overall height of the product is at least 34 mm or more, not meeting the requirement that the total height does not exceed 25 mm.

[0053] However, this explosion - proof lamp makes the explosion - proof lamp for helicopter platforms (LED) into a flame - proof + increased - safety ("d eⅡC") structure within a limited height range (not exceeding 25 mm), enabling it to be used in explosive gas environments of explosive zone ⅡC1.

[0054] The luminous intensity of the LED light source gradually decreases from the 90° direction to the 0° direction. However, the luminous intensity requirements of the present invention are shown in Table 1, which is exactly the opposite. It is required that the luminous intensity gradually increases from the 90° direction to the 0° direction. To meet the luminous intensity requirements, this solution is equipped with a light guide column and a light-transmitting cover for the LED light source. The main innovation lies in, according to the structural limitations of the product, using the cooperation of the light guide column and the light-transmitting cover to change the luminous intensity distribution of the LED and achieve the luminous intensity requirements in Table 1.

[0055] The characteristic of the light guide column is to reflect the light emitted by the LED light source in the vertical direction (90° direction) through total internal reflection in the V-shaped groove and turn it to the horizontal direction (0° direction). The purpose is to reduce the luminous intensity in the 90° direction and enhance the luminous intensity in the 0° direction.

[0056] During the design process, by continuously adjusting the shape of the light guide column and simulating the effect of total internal reflection of light, a light guide column with the horizontal luminous intensity meeting the requirements in Table 1 is finally obtained preferentially. During the optical simulation process, it will be found that the luminous intensity in the 90° direction is still relatively large. To further reduce the luminous intensity in the top 90° direction, light diffusing patterns can be set on the surface of the light-transmitting cover. Refer to Figure 2 , the light diffusing patterns include a frosted part 313 with a frosted effect in the middle and multiple groups of concave and convex circles 314 on the outside. The light diffusing patterns are permanently formed by the mold. When a small amount of light passes through the top, diffuse reflection occurs, achieving the purpose of weakening the top luminous intensity and finally meeting the luminous intensity requirements in Table 1.

[0057] Preferably, the diameter of the frosted part 313 is 0.55 - 0.6 of the diameter of the top surface of the light-transmitting cover, the interval of the concave and convex circles 314 is 0.13 - 0.16 of the diameter of the frosted part 313, and the concave and convex circles 314 are evenly distributed at intervals and spacings in the diameter direction of the top surface of the light-transmitting cover by the textures protruding from the top surface of the light-transmitting cover and the textures recessed into the top surface of the light-transmitting cover.

[0058] Preferably, the thickness from the bottom surface of the explosion-proof lamp fixing seat 200 to the top surface of the light-transmitting cover is about 20 mm, and the thickness of the light-transmitting cover is about 13 - 14 mm.

[0059] Those not detailed in the present invention are all well-known technologies to those skilled in the art.

[0060] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field based on the concept of the present invention through logical analysis, reasoning, or limited experiments on the basis of the existing technology should be within the protection scope determined by the claims.

Claims

1. An explosion-proof lamp for a thinner helicopter platform, Characterized in that: It includes a fixed seat, an installation groove is arranged on the fixed seat, a light-transmitting cover is installed in the installation groove, and the outer wall of the light-transmitting cover and the inner wall of the installation groove are sealed by pouring a first sealant; A first groove body, a wire passing hole and a threaded hole are arranged on the fixed seat, and a first screw is inserted into the first groove body and passes through the fixed seat and then is assembled and fixed with the transparent cover; A wiring cavity, a dividing part and a light source cavity are arranged in the transparent cover, and the dividing part is bonded and fixed to the aluminum substrate through an adhesive layer; A light source is arranged on the aluminum substrate, a clamping groove is arranged between the aluminum substrate and the light source, the clamping groove is clamped and fixed with a clamping part, the clamping part is arranged on a light guide column, and the light guide column is installed in the light source cavity; A light guide cavity is arranged on the light guide column, and the light source is installed in the light guide cavity; One end of the wire passes through the wire hole and is connected and conducted with the light source, and the other end of the wire is connected and conducted with the power output end; The surface of the light-transmitting cover is provided with a sunken pattern, and the sunken pattern includes a frosted part with a frosted effect in the middle and multiple groups of concave and convex circles on the outside; The diameter of the frosted part is 0.55-0.6 of the top surface diameter of the light-transmitting cover, the interval of the concave and convex circles is 0.13-0.16 of the diameter of the frosted part, and the concave and convex circles are evenly distributed at intervals and spacings in the diameter direction on the top surface of the light-transmitting cover by the texture protruding from the top surface of the light-transmitting cover and the texture recessed into the top surface of the light-transmitting cover; A V-shaped groove is arranged at the top of the light guide column, a light guide cavity is arranged at the bottom, the bottom of the V-shaped groove is the connection point, a diffusing arc surface is arranged on the top surface of the light guide cavity, the light source is installed in the light guide cavity, and a condensing arc surface is arranged directly above the light source and on the diffusing arc surface; The connection point is located at the geometric center of the condensing arc surface in the top view direction of the light guide column.

2. The explosion-proof lamp for a thinner helicopter platform according to claim 1, Characterized in that: The wire passing hole is sealed by pouring a third sealant, and the end of the threaded hole is sealed by pouring a second sealant.

3. The explosion-proof lamp for a thinner helicopter platform according to claim 1, Characterized in that: The light-transmitting cover and the bottom surface of the installation groove are pressed and sealed through a sealing ring.

4. The explosion-proof lamp for a thinner helicopter platform according to claim 1, Characterized in that: The aluminum substrate and the bottom surface of the installation groove are explosion-proof joint surfaces, the joint length L of the explosion-proof joint surfaces ≥ 9.5mm, and the explosion-proof gap ic ≤ 0.04mm.

5. The explosion-proof lamp for a thinner helicopter platform according to claim 1, Characterized in that: The adhesive bonding surface length of the adhesive layer ≥ 4mm, and the thickness is 0.2mm.

6. The explosion-proof lamp for a thinner helicopter platform according to claim 1, Characterized in that: The light guide column is made of a transparent material.

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