Laminated grating structure for sunlight brightness attenuation outside tunnel hole

Abstract

The utility model discloses a laminated grating structure for sunlight brightness attenuation outside a tunnel hole. The laminated grating structure comprises an upper-layer light-transmitting plate and a lower-layer light-transmitting plate which are arranged up and down and are respectively fixed on a framework, matt films which are arranged at intervals are respectively arrayed on the top surface of the upper-layer light-transmitting plate along the length direction and the width direction of the framework; a plurality of upper extinction strips are arrayed at corresponding positions below each extinction film on the bottom surface of the upper-layer light-transmitting plate along the length direction of the framework, and an upper reflecting film is arranged between every two adjacent upper extinction strips; an upper-layer light-transmitting area is formed on the upper-layer light-transmitting plate between the adjacent matt films; lower reflecting films which are arranged at intervals are respectively arrayed on the top surface of the lower-layer light-transmitting plate along the length direction and the width direction of the framework; the lower reflecting films are positioned at corresponding positions below the upper-layer light-transmitting area and are arc curved surfaces which protrude upwards; and lower matt strips which are arranged at intervals are arrayed at corresponding positions below each matt film on the top surface of the lower-layer light-transmitting plate along the length direction of the framework. The framework is applied to tunnel entrances and exits, so that eyes of a driver have brightness transition, and accidents are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel engineering field especially relates to a tunnel hole outside sunlight brightness attenuation's laminated grating structure. BACKGROUND

[0002] When the vehicle drives from the outside of the tunnel to the inside of the tunnel, the brightness of the outside of the tunnel is higher than that of the inside of the tunnel, and the brightness of the inside of the tunnel is darker than that of the outside of the tunnel, so the brightness of the inside of the tunnel is suddenly changed, and the change of brightness makes the eyes of the driver difficult to adapt to the change of brightness, and the eyes of the driver need to adjust the brightness difference between the inside and the outside of the tunnel for about 8-10 seconds, and before the pupil completes the physiological adjustment from small to large, the driver sees a black and blurred image at this time.

[0003] The light attenuation structure arranged outside the tunnel can reduce the influence of the brightness difference between the inside and the outside of the tunnel to a certain extent. At present, the common light attenuation structure outside the tunnel includes a light-shielding shed and the like, and the light-shielding shed is a one-time attenuation of the brightness of sunlight, and the attenuation effect is not significant, and a glaring light spot is formed at a certain illumination angle. Therefore, a laminated grating structure capable of attenuating the brightness of sunlight multiple times is needed. UTILITY MODEL CONTENT

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a laminated grating structure capable of attenuating the brightness of sunlight multiple times.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A laminated grating structure capable of attenuating the brightness of sunlight outside a tunnel, comprising an upper transparent plate and a lower transparent plate arranged in an upper-lower interval and arranged on a framework, respectively, and the framework is connected with the tunnel;

[0007] A plurality of rectangular light-absorbing films arranged in an interval are arrayed on the top surface of the upper transparent plate along the length direction and the width direction of the framework, respectively;

[0008] A plurality of upper light-absorbing strips arranged in an interval are arrayed on the bottom surface of the upper transparent plate below the corresponding position of each light-absorbing film along the length direction of the framework, and an upper reflecting film is arranged between adjacent upper light-absorbing strips, and the upper reflecting film and the upper light-absorbing strip on the bottom surface of the upper transparent plate are arranged alternately along the length direction of the framework;

[0009] The upper transparent plate between adjacent light-absorbing films forms an upper transparent area;

[0010] The top surface of the lower light-transmitting plate is provided with a plurality of spaced-apart lower reflective films in the length and width directions of the skeleton, the lower reflective films are located at corresponding positions below the upper light-transmitting areas, and the lower reflective films are upwardly convex arc surfaces.

[0011] The top surface of the lower light-transmitting plate is provided with a plurality of spaced-apart lower light-extinction strips in the length direction of the skeleton at corresponding positions below each of the light-extinction films, and the lower light-transmitting plate between adjacent lower light-extinction strips forms a lower light-transmitting area.

[0012] Further, the upper light-transmitting plate comprises A plates and B plates alternately arranged in the length and width directions of the skeleton, and the lower light-transmitting plate comprises C plates and D plates alternately arranged in the length and width directions of the skeleton, the A plates and the C plates correspond to each other in position, and the B plates and the D plates correspond to each other in position.

[0013] The top surface of the A plate is divided into 3X3 grids, the four corners and the five grids in the center region of the top surface of the A plate are respectively provided with the light-extinction films, and the A plates in the remaining grids are the upper light-transmitting areas; the bottom surface of the A plate is provided with A plate bottom light-reflecting films and A plate bottom light-extinction strips alternately arranged at corresponding positions below each of the light-extinction films.

[0014] The top surface of the B plate is divided into 3X3 grids, the four corners and the five grids in the center region of the top surface of the B plate are the upper light-transmitting areas, and the B plates in the remaining grids are respectively provided with the light-extinction films; the bottom surface of the B plate is provided with B plate bottom light-reflecting films and B plate bottom light-extinction strips alternately arranged at corresponding positions below each of the light-extinction films.

[0015] The top surface of the C plate is divided into 3X3 grids, the four corners and the five grids in the center region of the top surface of the C plate are respectively provided with a plurality of spaced-apart C plate top light-extinction strips, and the remaining grids are provided with C plate top light-reflecting mirrors.

[0016] The top surface of the D plate is divided into 3X3 grids, the four corners and the five grids in the center region of the top surface of the D plate are respectively provided with D plate top light-reflecting films, and the remaining grids are provided with a plurality of spaced-apart D plate top light-extinction strips.

[0017] The upper light-extinction strips comprise the A plate bottom light-extinction strips and the B plate bottom light-extinction strips, the lower light-extinction strips comprise the C plate top light-extinction strips and the D plate top light-extinction strips, the lower reflective films comprise the C plate top light-reflecting mirrors and the D plate top light-reflecting films, and the upper reflective films comprise the A plate bottom light-reflecting films and the B plate bottom light-reflecting films.

[0018] Further, the lower reflective films are partial spherical surfaces.

[0019] Furthermore, the skeleton includes an upper skeleton, a lower skeleton, and vertically moving parts. The upper skeleton and the lower skeleton are vertically slidably connected, and the upper light-transmitting plate and the lower light-transmitting plate are respectively integrated on the upper skeleton and the lower skeleton.

[0020] The lower frame is fixedly connected to the tunnel, and the vertical moving component drives the upper frame to adjust its height relative to the lower frame.

[0021] Furthermore, it also includes a controller and a solar photometer, the solar photometer being used to measure the brightness data below the frame, and the controller controlling the up-and-down moving components to move the upper frame according to the brightness data.

[0022] Furthermore, the frame includes an upper frame, a lower frame, and a horizontal moving component, with the upper light-transmitting plate and the lower light-transmitting plate respectively integrated on the upper frame and the lower frame;

[0023] The lower frame is fixedly connected to the tunnel, and the horizontal moving component is connected to the lower frame and drives the upper frame to move relative to the lower frame along the width direction of the frame.

[0024] Furthermore, it also includes a controller and a solar photometer, the solar photometer being used to measure the brightness data below the frame, and the controller controlling the horizontal moving component to move the upper frame based on the brightness data.

[0025] In the above technical solution, the present invention has the following beneficial effects:

[0026] When sunlight hits the upper light-transmitting panel, it is mainly divided into two parts. One part passes through the upper light-transmitting area and enters the lower light-transmitting panel, while the other part is absorbed by the matting film, achieving primary light attenuation. Most of the light entering the lower light-transmitting panel will hit the lower reflective film. After hitting the lower reflective film, the light is divided into three parts: one part is reflected by the lower reflective film and exits from the upper light-transmitting area; another part is reflected by the lower reflective film and absorbed at the upper matting strip, achieving secondary light attenuation; and a third part is reflected by the lower reflective film back to the upper reflective film. The light reflected to the upper reflective film is then reflected again, with one part passing through the lower light-transmitting area and entering the tunnel entrance, and the other part being absorbed by the lower matting strip, achieving tertiary light attenuation. This invention achieves multiple attenuations of sunlight, making it particularly suitable for daytime conditions with ample sunlight, and it uses energy-saving methods to achieve energy conservation, emission reduction, and low-carbon environmental protection. Attached Figure Description

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only represent some embodiments of the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0028] Figure 1 Structure diagram of the laminated grating structure disclosed by the present application;

[0029] Figure 2 Structure diagram of the top surface of the A plate disclosed by the present application;

[0030] Figure 3 Structure diagram of the bottom surface of the A plate disclosed by the present application;

[0031] Figure 4 Structure diagram of the cross section of the A plate disclosed by the present application;

[0032] Figure 5 Structure diagram of the top surface of the B plate disclosed by the present application;

[0033] Figure 6 Structure diagram of the bottom surface of the B plate disclosed by the present application;

[0034] Figure 7 Structure diagram of the cross section of the B plate disclosed by the present application;

[0035] Figure 8 Structure diagram of the top surface of the C plate disclosed by the present application;

[0036] Figure 9 Structure diagram of the cross section of the C plate disclosed by the present application;

[0037] Figure 10 Structure diagram of the top surface of the D plate disclosed by the present application;

[0038] Figure 11 Structure diagram of the cross section of the D plate disclosed by the present application;

[0039] Figure 12 Structure diagram of the top surface of the upper light-transmitting plate disclosed by the present application;

[0040] Figure 13 Structure diagram of the top surface of the lower light-transmitting plate disclosed by the present application;

[0041] Figure 14 Optical path diagram of the laminated grating structure disclosed by the present application. DETAILED DESCRIPTION

[0042] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings.

[0043] It should be noted that the terms "above", "one end", "upper" and the like used herein indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and similar expressions are only for illustrative purposes, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application; in addition, the terms "a part", "two parts" and the like are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0044] Reference Figures 1 to 14 The utility model provides a kind of tunnel hole outside sunlight brightness attenuation laminated grating structure, including upper and lower spaced apart and respectively arranged on the upper layer light transmission plate and lower layer light transmission plate of framework 5, and framework 5 is connected with tunnel.The upper layer light transmission plate and lower layer light transmission plate are respectively light transmission material, can be light transmission, upper layer light transmission plate top surface is attached with extinction film, bottom surface is attached with upper reflection film and upper extinction strip, and the top surface of lower layer light transmission plate is attached with lower extinction strip.The extinction film is rectangle, preferably square to make extinction effect uniform.

[0045] The top surface of upper layer light transmission plate is arrayed with multiple extinction films spaced apart along the length direction and width direction of framework 5.The number of extinction films is adjusted according to tunnel length and brightness requirement as needed.

[0046] The bottom surface of upper layer light transmission plate is arrayed with multiple upper extinction strips spaced apart along the length direction of framework 5 at the position corresponding to each extinction film below, and upper reflection film is arranged between adjacent upper extinction strips, and the upper reflection film and upper extinction strip on the bottom surface of upper layer light transmission plate are sequentially and alternately arranged along the length direction of framework 5, i.e. the order of upper reflection film, upper extinction strip, upper reflection film … is arranged. Multiple upper reflection films and upper extinction strips are below each extinction film. The length direction of upper reflection film and upper extinction strip is along the width direction of framework. Preferably, four upper reflection films and three upper extinction strips are correspondingly below each extinction film.

[0047] The upper layer light transmission plate between adjacent extinction films forms upper layer light transmission area.

[0048] The top surface of lower layer light transmission plate is arrayed with multiple lower reflection films spaced apart along the length direction and width direction of framework 5, and the lower reflection film is located at the position corresponding to upper layer light transmission area below, the outer surface of lower reflection film is overall upward convex arc surface, and the edge size and edge shape of lower reflection film correspond to the edge of extinction film. The lower reflection film diffuses light beam, and the light received by lower reflection film can be emitted from upper layer light transmission area as much as possible, and the remaining light falls on the bottom surface of upper layer light transmission plate.

[0049] Preferably, the lower reflective film is a partial spherical surface.

[0050] The lower light-transmitting plate has a plurality of lower light-extinction strips arranged at corresponding positions below each light-extinction film along the length direction of the skeleton 5, i.e., a plurality of lower light-extinction strips are arranged between adjacent lower reflective films, and the lower light-transmitting plate between adjacent lower light-extinction strips forms a lower light-transmitting area.

[0051] Preferably, there are three lower light-extinction strips and four lower light-transmitting areas below each light-extinction film, and each lower reflective film is connected to a lower light-transmitting area. The lower light-extinction strips are long strips arranged along the width direction of the skeleton, and the width direction of the tunnel.

[0052] When sunlight is incident on the upper light-transmitting plate, it is mainly divided into two parts. One part of the light is transmitted through the upper light-transmitting area into the lower light-transmitting plate, and the other part of the light is absorbed by the light-extinction film to achieve the first attenuation of light. Most of the light incident on the lower light-transmitting plate is incident on the lower reflective film. After the light is incident on the lower reflective film, it is divided into three parts. One part of the light is transmitted out of the upper light-transmitting area through the reflection of the lower reflective film, one part of the light is reflected by the lower reflective film to the upper light-extinction strip and is absorbed to achieve the second attenuation of light, and one part of the light is reflected by the lower reflective film to the upper reflective film. The light reflected to the upper reflective film is reflected by the upper reflective film again. One part of the light is transmitted into the inside of the tunnel through the lower light-transmitting area, and the other part of the light is absorbed by the lower light-extinction strip to achieve the third attenuation of light. Through the reflection and absorption of the upper and lower reflective films, light-extinction films, and upper and lower light-extinction strips in the grating structure, the natural light outside the tunnel is attenuated three times through the structure. When the driver enters or exits the tunnel from the natural light environment, the human eye has enough time and suitable light gradient to adapt to the difference in brightness inside and outside the tunnel.

[0053] Preferably, the upper light-transmitting plate includes A plates 1 and B plates 2 alternately arranged along the length direction and the width direction of the skeleton 5, and the lower light-transmitting plate includes C plates 3 and D plates 4 alternately arranged along the length direction and the width direction of the skeleton 5. The A plates 1 and the C plates 3 correspond to each other in the upper and lower positions, and the B plates 2 and the D plates 4 correspond to each other in the upper and lower positions.

[0054] The top surface of the A plate 1 is divided into 3X3 grids. The four corners and the five grids in the center area of the top surface of the A plate 1 are provided with light-extinction films. The light-extinction films on the A plate 1 are set as A plate top light-extinction films 8, and the A plate 1 in the remaining grids is set as A plate light-transmitting areas 6. The bottom surface of the A plate 1 is provided with A plate bottom light-reflecting films 14 and A plate bottom light-extinction strips 12 alternately arranged at corresponding positions below each light-extinction film. Preferably, there are four A plate bottom light-reflecting films 14 and three A plate bottom light-extinction strips 12 below each light-extinction film. The A plate bottom light-reflecting films 14 and the A plate bottom light-extinction strips 12 are long strips.

[0055] The top surface of the B plate 2 is divided into 3X3 grids, and the four corners and the five grids in the central area of the top surface of the B plate 2 are respectively provided with an upper light-transmitting area, which is a B plate light-transmitting area 7. The B plate 2 is respectively provided with a light-absorbing film in the remaining grids, and the light-absorbing film on the B plate is provided as a B plate top light-absorbing film 9. The bottom surface of the B plate 2 is provided with alternately arranged B plate bottom light-reflecting films 15 and B plate bottom light-absorbing strips 13 at the corresponding positions below each light-absorbing film. The B plate bottom light-reflecting films 15 and the B plate bottom light-absorbing strips 13 are in a strip shape. Preferably, there are four B plate bottom light-reflecting films 15 and three B plate bottom light-absorbing strips 13 below each light-absorbing film.

[0056] The top surface of the C plate 3 is divided into 3X3 grids, and the four corners and the five grids in the central area of the top surface of the C plate 3 are respectively provided with a plurality of spaced-apart C plate top light-absorbing strips 18. The remaining grids are provided with C plate top light-reflecting mirrors 10. The space between two adjacent C plate top light-absorbing strips 18 is a lower light-transmitting area, which is a C plate light-transmitting area 16. A plurality of strip-shaped C plate top light-absorbing strips 18 are arranged in the five grids. Preferably, there are four lower light-transmitting areas and three C plate top light-absorbing strips 18.

[0057] The top surface of the D plate 4 is divided into 3X3 grids, and the four corners and the five grids in the central area of the top surface of the D plate 4 are respectively provided with D plate top light-reflecting films 11. The remaining grids are provided with a plurality of spaced-apart D plate top light-absorbing strips 19. The space between two adjacent D plate top light-absorbing strips 19 is a lower light-transmitting area, which is a D plate light-transmitting area 17. A plurality of strip-shaped D plate top light-absorbing strips 19 are arranged in the remaining four grids. Preferably, there are four lower light-transmitting areas and three D plate top light-reflecting films 11.

[0058] The upper light-absorbing strips include the A plate bottom light-absorbing strips 12 and the B plate bottom light-absorbing strips 13. The lower light-absorbing strips include the C plate top light-absorbing strips 18 and the D plate top light-absorbing strips 19. The lower light-reflecting films include the C plate top light-reflecting mirrors 10 and the D plate top light-reflecting films 11. The upper light-transmitting areas include the A plate light-transmitting areas 6 and the B plate light-transmitting areas 7. The lower light-transmitting areas include the C plate light-transmitting areas 16 and the D plate light-transmitting areas 17.

[0059] The extinction film adopts 100% efficiency, and the ABCD plates all adopt light-transmitting materials. Sunlight is irradiated onto the A plate 1 and the B plate 2, a part of the light is transmitted through the A plate 1 and the B plate 2 through the A plate light-transmitting area 6 and the B plate light-transmitting area 7, and a part of the light is absorbed through the A plate top extinction film 8 and the B plate top extinction film 9, thereby realizing the first attenuation of the light. The light transmitted through the A plate light-transmitting area 6 and the B plate light-transmitting area 7 is irradiated onto the C plate top light-reflecting film 10 and the D plate top light-reflecting film 11, a part of the light is reflected out through the A plate light-transmitting area 6 and the B plate light-transmitting area 7, and a part of the light is reflected to the A plate bottom extinction strip 12 and the B plate bottom extinction strip 13 and is absorbed, thereby realizing the second attenuation of the light. The light reflected through the C plate top light-reflecting film 10 and the D plate top light-reflecting film 11 is reflected to the A plate bottom light-reflecting film 14 and the B plate bottom light-reflecting film 15, a part of the light enters the inside of the tunnel hole through the C plate light-transmitting area 16 and the D plate light-transmitting area 17, and a part of the light is absorbed by the C plate top extinction strip 18 and the D plate top extinction strip 19, thereby realizing the third attenuation of the light. The natural light outside the tunnel hole is attenuated through the three times of attenuation of the sunlight brightness attenuation superimposed grating structure outside the tunnel hole, so that the sunlight brightness at the entrance section and the exit section of the tunnel is adjusted. The width and the arrangement density of the A plate bottom extinction strip 12, the B plate bottom extinction strip 13, the C plate top extinction strip 18 and the D plate top extinction strip 19 are adjusted to achieve the required attenuation brightness of the light.

[0060] Preferably, the framework 5 comprises an upper layer framework, a lower layer framework and an up-down moving component, the upper layer framework and the lower layer framework are connected in vertical sliding mode, and the upper layer light-transmitting plate and the lower layer light-transmitting plate are respectively integrated on the upper layer framework and the lower layer framework. The lower layer framework is fixedly connected with the tunnel, and the up-down moving component drives the height of the upper layer framework relative to the lower layer framework to be adjustable. Such design can improve the applicability of the superimposed grating structure and is applicable in different light illumination areas.

[0061] Optionally, the upper layer framework and the lower layer framework are respectively frame structures, four upward sliding columns are fixedly arranged at the four corners of the lower layer framework, and four sliding sleeves corresponding to the sliding columns are arranged at the corresponding four corners of the upper layer framework, the sliding columns can be extended into the sliding sleeves, and the different extension lengths correspond to different distances between the upper layer framework and the lower layer framework. The up-down moving component is used to control the different distances between the upper layer framework and the lower layer framework, and preferably, a plurality of vertical air cylinders are used, one end of each air cylinder is fixed to the lower layer framework, and the free end of each air cylinder is fixed to the upper layer framework.

[0062] Optionally, the upper layer framework and the lower layer framework are respectively frame structures, and the up-down moving component comprises four electric telescopic rods arranged at the four corners of the framework, the electric telescopic rods are arranged on the lower layer framework to drive the upper layer framework to move up and down.

[0063] The controller and the sunlight meter are further included, the sunlight meter is used to measure the brightness data under the framework 5, the controller controls the horizontal moving part to drive the upper framework to move according to the brightness data. The design is to adapt to the light change of different weather or different time in an area or the change of the site in and out of the tunnel, and to make real-time adjustment.

[0064] Preferably, the framework 5 includes an upper framework, a lower framework, a horizontal moving part, an upper light-transmitting plate and a lower light-transmitting plate integrated on the upper framework and the lower framework respectively.

[0065] The lower framework is fixedly connected with the tunnel, and the horizontal moving part is connected with the lower framework and drives the upper framework to move relative to the lower framework along the width direction of the framework 5.

[0066] Optionally, the horizontal moving part adopts a linear module, the upper framework and the lower framework are frame structures respectively, and the lower framework is fixedly connected with the tunnel. Two side edges of the lower framework arranged along the width direction of the framework are provided with linear module bodies, the length direction of each linear module body is along the width direction of the framework, sliders slidably matched with the linear module bodies are fixed on the upper framework, and the two sliders fixedly support two ends of the upper framework. The upper framework moves along the width direction of the framework, and the decay brightness of the required light can be adjusted.

[0067] Optionally, the horizontal moving part adopts a cylinder, the upper framework and the lower framework are frame structures respectively, and the lower framework is fixedly connected with the tunnel. The upper framework and the lower framework are slidably connected along the width direction of the framework. Two side edges of the lower framework arranged along the width direction of the framework are provided with rails, sliders slidably matched with the rails are fixed on the upper framework, and the two sliders fixedly support two ends of the upper framework. Horizontally arranged cylinders are arranged along the width direction of the framework, the two cylinders are fixed on the outer side of the lower framework, free ends of the cylinders are fixed on the upper framework, and the cylinders drive the upper framework to move. The upper framework moves along the width direction of the framework, and the decay brightness of the required light can be adjusted.

[0068] The controller and the sunlight meter are further included, the sunlight meter is used to measure the brightness data under the framework 5, the controller controls the horizontal moving part to drive the upper framework to move according to the brightness data. The design is to adapt to the light change of different weather or different time in an area or the change of the site in and out of the tunnel, and to make real-time adjustment.

[0069] The above only describes certain exemplary embodiments of the present application in a descriptive manner, and it is needless to say that those skilled in the art can modify the described embodiments in various manners without departing from the spirit and scope of the present application. Therefore, the above drawings and descriptions are illustrative in nature and should not be understood as limiting the scope of protection of the claims of the present application.

Claims

1. A stacked grating structure for attenuation of sunlight outside a tunnel opening, characterized in that, The application relates to a tunnel lighting device, which comprises an upper light-transmitting plate and a lower light-transmitting plate arranged in a space and arranged on a framework (5) connected with a tunnel; A plurality of rectangular light-extinction films arranged in a space are arrayed on the top surface of the upper light-transmitting plate along the length direction and the width direction of the framework (5) respectively; A plurality of upper light-extinction strips arranged in a space are arrayed on the bottom surface of the upper light-transmitting plate below the corresponding positions of each light-extinction film along the length direction of the framework (5), and upper reflecting films are arranged between adjacent upper light-extinction strips; the upper reflecting films and the upper light-extinction strips on the bottom surface of the upper light-transmitting plate are alternately arranged along the length direction of the framework (5) in sequence; The upper light-transmitting plate between adjacent light-extinction films forms an upper light-transmitting area; A plurality of lower reflecting films arranged in a space are arrayed on the top surface of the lower light-transmitting plate along the length direction and the width direction of the framework (5) respectively, the lower reflecting films are arranged below the corresponding positions of the upper light-transmitting area, and the outer surface of the lower reflecting films is an upwardly convex arc surface as a whole; A plurality of lower light-extinction strips arranged in a space are arrayed on the top surface of the lower light-transmitting plate below the corresponding positions of each light-extinction film along the length direction of the framework (5), and the lower light-transmitting plate between adjacent lower light-extinction strips forms a lower light-transmitting area.

2. A stacked grating structure for attenuation of external sunlight into a tunnel according to claim 1, characterized in that, The upper light-transmitting plate comprises A plates (1) and B plates (2) alternately arranged along the length direction and the width direction of the framework (5), the lower light-transmitting plate comprises C plates (3) and D plates (4) alternately arranged along the length direction and the width direction of the framework (5), the A plates (1) and the C plates (3) are correspondingly arranged in a light-transmitting mode in up-down positions respectively, and the B plates (2) and the D plates (4) are correspondingly arranged in a light-transmitting mode in up-down positions respectively; The top surface of the A plate (1) is divided into 3X3 grids, the four corners and the five grids in the central region of the top surface of the A plate (1) are respectively provided with the light-extinction films, the A plate (1) in the remaining grids is the upper light-transmitting area, and the bottom surface of the A plate (1) is provided with A plate bottom light-reflecting films (14) and A plate bottom light-extinction strips (12) alternately arranged below the corresponding positions of each light-extinction film; The top surface of the B plate (2) is divided into 3X3 grids, the four corners and the five grids in the central region of the top surface of the B plate (2) are the upper light-transmitting area, and the B plate (2) in the remaining grids is respectively provided with the light-extinction films; the bottom surface of the B plate (2) is provided with B plate bottom light-reflecting films (15) and B plate bottom light-extinction strips (13) alternately arranged below the corresponding positions of each light-extinction film; The top surface of the C plate (3) is divided into 3X3 grids, the four corners and the five grids in the central region of the top surface of the C plate (3) are respectively provided with a plurality of C plate top light-extinction strips (18) arranged in a space, and the remaining grids are provided with C plate top light-reflecting mirrors (10); The top surface of the D plate (4) is divided into 3X3 grids, the four corners and the five grids in the central region of the top surface of the D plate (4) are respectively provided with D plate top light-reflecting films (11), and the remaining grids are provided with a plurality of D plate top light-extinction strips (19) arranged in a space. The upper extinction strip includes the A plate bottom extinction strip (12) and B plate bottom extinction strip (13), the lower extinction strip includes the C plate top extinction strip (18) and D plate top extinction strip (19), the lower reflective film includes C plate top light reflector (10) and D plate top light reflective film (11), the upper reflective film includes A plate bottom light reflective film (14) and B plate bottom light reflective film (15).

3. A stacked grating structure for attenuation of external sunlight into a tunnel according to claim 1, wherein The lower reflective film is a partial spherical surface.

4. A stacked grating structure for attenuation of external sunlight into a tunnel according to claim 1, wherein The skeleton (5) includes an upper skeleton, a lower skeleton, and an up-down moving component, the upper skeleton and the lower skeleton are connected in vertical sliding, and the upper light-transmitting plate and the lower light-transmitting plate are integrated on the upper skeleton and the lower skeleton respectively. The lower skeleton is fixedly connected with the tunnel, and the up-down moving component drives the height of the upper skeleton relative to the lower skeleton to be adjustable.

5. A stacked grating structure for attenuation of external sunlight into a tunnel according to claim 4, characterized in that, A controller and a solar photometer are further included, the solar photometer is used to measure the brightness data below the skeleton (5), and the controller controls the up-down moving component to move the upper skeleton according to the brightness data.

6. A stacked grating structure for attenuation of external sunlight into a tunnel according to claim 1, wherein The skeleton (5) includes an upper skeleton, a lower skeleton, and a horizontal moving component, and the upper light-transmitting plate and the lower light-transmitting plate are integrated on the upper skeleton and the lower skeleton respectively. The lower skeleton is fixedly connected with the tunnel, and the horizontal moving component is connected on the lower skeleton and drives the upper skeleton to move relative to the lower skeleton along the width direction of the skeleton (5).

7. A stacked grating structure for attenuation of external sunlight into a tunnel according to claim 6, characterized in that, A controller and a solar photometer are further included, the solar photometer is used to measure the brightness data below the skeleton (5), and the controller controls the horizontal moving component to move the upper skeleton according to the brightness data.

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