Roof lighting and ventilating system for factory building or storehouse house

Abstract

The utility model provides a factory building or storehouse roof lighting and ventilating system which comprises a rain and snow preventing unit, the rain and snow preventing unit comprises upper-layer rain baffles, middle-layer rain baffles and bottom drainage grooves, the middle-layer rain baffles cover the positions over the gaps of the adjacent bottom drainage grooves, the upper-layer rain baffles cover the positions over the gaps of the adjacent middle-layer rain baffles, and the lower-layer rain baffles cover the positions over the gaps of the adjacent middle-layer rain baffles. At least three layers of staggered shielding ventilation paths are formed; the rain and snow prevention unit further comprises a snow prevention net which is fixedly installed in a manner of being tightly attached to the upper-layer rain baffle, and the snow prevention net and the upper-layer rain baffle are alternately arranged. The movable valve plate is arranged at the upper part of the ventilation system, clings to the upper-layer rain baffle and the snow-proof net, is controlled by a driving mechanism to move along a straight line and is used for dynamically opening and closing a ventilation path; the supports are fixed to the profile steel in an array mode, and the profile steel is fixed to the roof purline and used for supporting the rain and snow preventing unit and the movable valve plate. The special ventilation path improves the rain and snow prevention performance and the lighting and ventilation performance, the installation structure of the snow prevention net improves the use safety performance, and the ventilation efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of roof building technology, specifically relating to a roof lighting and ventilation system for factory or warehouse buildings. Background Technology

[0002] Current industrial plant / warehouse roof lighting and ventilation equipment has many shortcomings:

[0003] Traditional FRP (fiberglass reinforced plastic) translucent panels, while providing some light, cannot meet ventilation and heat dissipation requirements. Furthermore, they are prone to yellowing and cracking after prolonged use, leading to dim lighting, stale air accumulation, and increased risk of workplace accidents. Non-powered roof ventilators only operate under high air pressure or strong winds, with limited airflow, making them unsuitable for the ventilation needs of modern, large, multi-span factory buildings. While ventilation louvers offer improved airflow, their complex structure, heavy weight, weak earthquake and wind resistance, and difficulties in construction and maintenance, coupled with a lack of insulation in winter and the risk of rain and snow intrusion, all contribute to the problem. Newer roof ventilators, while offering better lighting and lighter weight, suffer from structural defects that commonly result in leaks and snow intrusion, causing losses for businesses.

[0004] Therefore, there is an urgent need for a roof lighting and ventilation system that can effectively solve the problems of insufficient ventilation and lighting, and poor rain and snow protection. Based on this, patent CN218264509U discloses a roof device for industrial plants or warehouses, including a bottom frame. Several lower rainproof panels are installed between the front and rear sides of the bottom frame, with a distance between adjacent lower rainproof panels. The front and rear ends of the lower rainproof panels are fixed to the bottom frame by main supports. A middle rainproof panel structure, an upper rainproof panel structure, and a valve plate assembly are installed between the front and rear main supports. The valve plate assembly is connected to a driving device. Each middle rainproof panel is located above two adjacent lower rainproof panels, and each upper rainproof panel is located above two adjacent middle rainproof panels. The valve plate assembly is located between the middle and upper rainproof panels. This system solves the problem of severe deficiencies in ventilation, lighting, and heat dissipation in existing industrial plants or warehouses, and has good ventilation and heat dissipation effects.

[0005] However, in the aforementioned patent, the snow netting and valve plate are alternately placed between the middle and upper rainproof panels, requiring the valve plate to be moved to a specific position to function as snow protectors, resulting in insufficient snow protection timeliness. Secondly, the snow netting and valve plate are suspended together from the valve plate connecting rod, which may deform due to the weight of accumulated snow, affecting the valve plate's opening and closing accuracy and causing leaks and snow ingress due to poor sealing. Furthermore, the connection between the snow netting and valve plate connecting rod, located between the middle and upper layers, requires disassembly of the upper rainproof panel and rainproof panel fixing frame during maintenance, making the operation complex and time-consuming. Thirdly, with the snow netting and valve plate alternately placed, the snow netting is susceptible to deformation under external forces. When the valve plate moves to the insulation position, the snow netting may be under the upper rainproof panel, causing it to be scratched or torn, thus losing its protective function. Utility Model Content

[0006] The purpose of this utility model is to provide a roof lighting and ventilation system for factory buildings or warehouses to solve the above-mentioned technical problems.

[0007] A roof lighting and ventilation system for a factory or warehouse, comprising:

[0008] The rain and snow protection unit includes an upper rain shield, a middle rain shield, and a bottom drainage channel arranged in layers. The upper rain shields, the middle rain shields, and the bottom drainage channels in each layer are spaced apart. The middle rain shield covers the gap directly above the bottom drainage channel, and the upper rain shield covers the gap directly above the middle rain shield, forming at least three layers of staggered ventilation paths.

[0009] The rain and snow protection unit also includes a snow net, which is installed close to the upper rainproof board and is arranged alternately with the upper rainproof board;

[0010] The rain and snow protection unit also includes a movable valve plate, which is located on the upper part of the rain and snow protection unit and installed close to the upper rain shield and snow net. It is controlled by a drive mechanism to move along a straight line and is used to dynamically open and close the ventilation path.

[0011] The brackets, fixed in an array on the steel profile, are used to support the rain and snow protection unit and the movable valve plate.

[0012] Preferably, the snow net can be selectively installed above or below the upper rainproof panel.

[0013] Preferably, the valve plate is installed below the upper rain shield and snow net, and is installed close to the upper rain shield and snow net. The driving mechanism includes an electric push rod, a valve plate transmission rod, a pulley block and a guide rail. The valve plate transmission rod connects the movable valve plates into a whole and is driven to move by the electric push rod. The pulley block installed on the valve plate transmission rod is rolled and embedded in the guide rail, guiding the valve plate transmission rod to slide along the guide rail.

[0014] Furthermore, when the movable valve plate is closed, both ends are embedded in the guide rail, and the side of the movable valve plate closely overlaps with the upper rain shield, so that when the movable valve plate is closed, it blocks the ventilation path and forms a sealed fit with the upper rain shield; the movable valve plate is provided with several guide grooves extending in the front-back direction.

[0015] Furthermore, the guide rail includes a guide rail body and guide grooves located on the left and right sides of the guide rail body respectively. The guide grooves are lowered on the side away from the guide rail body to install the valve plate transmission rod and pulley assembly. Pulley assemblies are installed on the side and bottom of the valve plate transmission rod, and the two sets of pulley assemblies are in rolling contact with the bottom and side wall of the guide groove respectively.

[0016] Furthermore, the bracket includes a vertical support portion, a diagonal brace portion, and a horizontal shoulder portion. The vertical support portion is fixed to the structural steel. The upper end of the vertical support portion is bent inward to form the horizontal shoulder portion, which is used to support the middle layer rain shield. The diagonal brace portion is a honeycomb-shaped component formed by extending the inner side of the horizontal shoulder portion upward and downward respectively. The diagonal brace portion supports the upper layer rain shield and the movable valve plate.

[0017] Preferably, the middle rain shield is made of a light-transmitting material and is fixed to the middle rain shield bracket by a snap-fit ​​connection. The middle rain shield bracket is fixed to the horizontal shoulder of the bracket, forming a nail-free installation structure for the middle rain shield.

[0018] Furthermore, side snow deflectors are installed between the brackets, and the side snow deflectors are located below the middle rain deflector to prevent snowflakes from entering the room through the gaps under the middle rain deflector.

[0019] Furthermore, the bracket and the bottom drainage channel are both fixedly supported by structural steel, and the bracket, movable valve plate and rain and snow protection unit are covered and fixed by an outer protective plate.

[0020] The steel profile is fitted with outwardly inclined flashing around its perimeter to seal roof joints and guide rainwater outwards.

[0021] Furthermore, the upper rain shield and the movable valve plate are provided with a removable insulation layer.

[0022] The beneficial effects of this utility model are:

[0023] This invention boasts excellent rain and snow protection performance. It employs a labyrinthine multi-layered rain and snow protection structure, with the upper layer covering the gaps in the lower layers, forming at least three staggered ventilation paths for superior rain and snow protection. The movable valve plate is installed at the top of the system, close to the upper rain shield and below the snow net. When closed, it completely blocks the ventilation path, diverting rainwater at the top of the system and preventing rain and snow from entering the ventilation system, resulting in significant rain and snow protection. The upper rain shield, middle rain shield, and bottom drainage channel are all installed flat, with sufficient gaps between layers, effectively opening up half of the roof area, increasing the area for lighting and ventilation, and improving ventilation efficiency.

[0024] The snowproof net of this application is installed close to the side of the upper rainproof board and is arranged alternately with the upper rainproof board, so that the snowproof net is directly located at the wind and snow entrance of the roof, which can intercept snow accumulation at the first time and prevent snow accumulation from entering the ventilation path through the gap of the upper rainproof board, thus improving the snow protection timeliness.

[0025] When the snow net of this application is installed above the upper rainproof board, maintenance only requires removing the top fixing parts of the snow net, without disassembling the upper rainproof board or valve plate assembly, thus improving maintenance efficiency. Simultaneously, the snow net is fixed by the upper bracket, forming an independent support system with the guide rail and bracket, independent of the valve plate drive rod for load bearing, and can withstand greater snow loads, avoiding the problem of valve plate drive rod deformation due to large snow accumulation on the snow net. The movable valve plate of this application is tightly attached to the upper rainproof board. Compared to the prior art layout where the valve plate is located between the middle and upper rainproof boards, this application can directly block the intrusion path of rain and snow. Especially when the valve plate is closed, the upper rainproof board and the movable valve plate form a double seal, resulting in better leak-proof performance and preventing the snow net from being scratched or torn.

[0026] The snow netting of this application can be installed above or below the upper rainproof board. When the snow netting is installed above the upper rainproof board, it is easy to maintain and is suitable for the south with low snowfall. When it is installed below, it has high strength, saves on pressure plate components, saves labor and investment, and is suitable for the north with high snowfall. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0028] Figure 1 This is a schematic diagram of the internal structure of the lighting and ventilation system of this utility model;

[0029] Figure 2 This is a partial front view schematic diagram of the lighting and ventilation system of this utility model;

[0030] Figure 3 This is a partial exploded structural diagram of the lighting and ventilation system of this utility model;

[0031] Figure 4 This is a schematic diagram of the connection structure between the movable valve plate and the drive mechanism of this utility model;

[0032] Figure 5 This is a side view of the cooperation between the movable valve plate and the guide rail of this utility model;

[0033] Figure 6 This is a partially enlarged schematic diagram of the internal structure of this utility model;

[0034] Figure 7 This is a partially enlarged schematic diagram of the bracket and the middle rainproof plate of this utility model in combination;

[0035] Figure 8 This is a schematic diagram of the overall appearance of this utility model;

[0036] Figure 9This is an exploded view illustrating the installation structure of the outer protective plate and flashing plate of this utility model.

[0037] The diagram is marked as follows:

[0038] 1. Bracket; 11. Vertical support; 12. Diagonal brace; 13. Horizontal shoulder; 2. Steel section; 31. Upper rain shield; 32. Middle rain shield; 321. Buckle; 33. Bottom drainage channel; 34. Snow net; 4. Movable valve plate; 41. Guide channel; 5. Drive mechanism; 51. Electric push rod; 52. Valve plate transmission rod; 53. Pulley block; 54. Guide rail; 541. Guide rail body; 542. Guide channel; 543. Guide rail dust baffle; 55. Push rod fixing frame; 6. Upper baffle bracket; 7. Side snow shield; 8. Outer protective plate; 81. Outer protective plate bracket; 9. Drainage plate; 10. Ventilation path. Detailed Implementation

[0039] like Figures 1 to 9 As shown, a factory or warehouse roof lighting and ventilation system mainly consists of a rain and snow protection unit, a movable valve plate 4, a drive mechanism 5, and a support 1. The components work together to achieve functions such as lighting, ventilation, rain and snow protection, and heat preservation.

[0040] Please refer to Figure 1 Several brackets 1 are arrayed and fixed to the steel profile 2 to support the rain and snow protection unit and the movable valve plate 4. In one specific embodiment, the steel profile 2 is a Z-shaped steel. Of course, other steel profiles well known in the art are also within the scope of protection of this application, and this application does not limit them. During installation, the steel profile 2 is first installed on the roof purlins as the foundation of this system, and the steel profile 2 forms a frame structure; then the brackets 1 are fixed to the steel profile 2. The brackets can be set and extended at intervals in the front-back and left-right directions depending on the size of the lighting and ventilation system.

[0041] For details, please refer to Figure 2 and Figure 7 The support frame 1 includes a vertical support section 11, diagonal bracing sections 12, and horizontal shoulders 13. The vertical support sections 11 are L-shaped, with each frame 1 containing two vertical support sections 11 (left and right). Their legs are fixed to the steel profile 2. The upper ends of the vertical support sections 11 are bent inwards to form horizontal shoulders 13, which support the middle-layer rain shield 32. The diagonal bracing sections 12 are honeycomb-shaped components formed by the inner sides of the two horizontal shoulders 13 extending upwards and downwards respectively. The diagonal bracing sections 12 support the upper-layer rain shield 31 and the movable valve plate 4. Compared to conventional structures using vertical columns and overlapping joints, the honeycomb-shaped diagonal bracing sections 12 of this support frame 1 can withstand greater wind and snow loads, making it particularly suitable for areas prone to high-intensity earthquakes.

[0042] like Figures 1 to 3As shown, the rain and snow protection unit is installed on the steel profile 2 and the bracket 1. It consists of a three-layer structure: an upper rain shield 31, a middle rain shield 32, and a bottom drainage channel 33. There are gaps between adjacent components in each layer, and the middle rain shield 32 covers the gap directly above the bottom drainage channel 33; the upper rain shield 31 covers the gap directly above the middle rain shield 32, forming at least three layers of staggered ventilation paths 10. When the ventilation paths are opened, the hot air in the workshop is discharged through the siphon channel formed by the gaps in the bottom drainage channel 33, the middle rain shield 32, and the upper rain shield 31, while fresh outside air is replenished from the perimeter of the roof.

[0043] In one alternative embodiment, the gap width between the bottom drainage channel 33, the middle rainproof board 32, and the upper rainproof board 31 is basically equal to the width of the board body, so that nearly 50% of the roof area is opened to form a ventilation channel, and the ventilation area is more than twice that of traditional air louvers.

[0044] Please refer to Figure 2 The movable valve plate 4 is located at the top of the ventilation path and is close to the bottom of the upper rain shield 31. The movable valve plate 4 is controlled by the drive mechanism 5 to move linearly, dynamically opening and closing the ventilation path 10. For example, when the movable valve plate 4 is closed, it completely blocks the ventilation path and forms a sealed fit with the upper rain shield 31. The movable valve plate 4 is provided with several guide grooves 41 extending in the front-to-back direction, which quickly divert rainwater to the drainage ditch for discharge, completely preventing rain and snow from entering.

[0045] Please refer to Figures 3 to 5 The drive mechanism 5 includes an electric push rod 51, a valve plate drive rod 52, a pulley block 53, and a guide rail 54. A push rod fixing bracket 55 is mounted on the horizontal shoulder 13 of a bracket 1 located at the left / right end, and the electric push rod 51 is mounted on the push rod fixing bracket 55. The valve plate drive rod 52 connects the movable valve plates 4 into a single unit. The output end of the electric push rod 51 is mounted on the valve plate drive rod 52, thereby driving the movable valve plates 4 and the valve plate drive rod 52 to translate. The pulley block 53 mounted on the valve plate drive rod 52 is embedded in the guide rail 54, guiding the valve plate drive rod 52 to slide flexibly along the guide rail 54. Multiple sets of valve plates, electric push rods, and drive mechanisms can be configured depending on the size of the system.

[0046] Specifically, such as Figure 5As shown in the figure, the shape of the guide rail 54 is similar to the shape of the Chinese character "ji", which can be folded from a thin steel plate. It includes a guide rail main body 541 and guide grooves 542 respectively located on the left and right sides of the guide rail main body 541. The height of the side of the guide groove 542 far from the guide rail main body 541 sinks, which is used to avoid the valve plate transmission rod 52 extending into the guide groove 542 and is also used for rainwater diversion. Pulley groups 53 are installed on the side and bottom of the valve plate transmission rod 52. The two pulley groups 53 are respectively in rolling contact with the bottom and side walls of the guide groove 542, reducing the frictional resistance and ensuring noiseless operation. The matching structure of the guide groove 542 and the pulley group 53 also limits the valve plate transmission rod 52 within the guide groove 542 to prevent it from falling off the guide rail 54. A guide rail dust-proof plate 543 can also be installed at the top of the guide rail 54 to prevent dust accumulation and block the operation of the pulleys on the movable valve plate 4.

[0047] After detecting the rain and snow signal, the electric push rod 51 contracts, and the movable valve plate 4 is translated below the snow-proof net 34. The two ends of the movable valve plate 4 are embedded in the grooves of the guide rail 54, and its side overlaps with the upper rain-proof plate 31 (for example, overlaps 20 mm) to form a sealed fit, completely blocking the ventilation path 10. The diversion groove 41 of the movable valve plate 4 guides the rainwater to the drainage groove, blocking the entry of rain and snow. After the rain and snow stop, the electric push rod 51 resets, moving the movable valve plate 4 below the upper rain-proof plate 31 to restore the ventilation and lighting functions.

[0048] As Figure 6 As shown in the figure, the rain and snow prevention unit further includes a snow-proof net 34. The snow-proof net 34 is installed between two upper rain-proof plates 31 and is directly above the middle rain-proof plate 32, which is the position of the air outlet of the entire system. The left and right sides of the snow-proof net 34 are closely attached to the upper rain-proof plates 31 and are alternately arranged with the upper rain-proof plates 31. Specifically, a number of upper retaining brackets 61 extending in the front and rear directions are installed on the top of the guide rail 54. The connection between the snow-proof net 34 and the upper rain-proof plate 31 is fixed to the upper retaining brackets 61. It can be selected to install the left and right sides of the snow-proof net 34 above or below the upper rain-proof plates 31. Self-tapping screws can be used to fix the snow-proof net 34 and the upper rain-proof plates 31 to the upper retaining brackets 61, and waterproof glue is applied at the screw holes.

[0049] In areas with less snow in the south, the left and right sides of the snow-proof net 34 are installed above the upper rain-proof plates 31 and fixed through the upper retaining brackets 61, which is convenient for disassembly and assembly. When internal components need to be repaired, only the self-tapping screws at the top of the snow-proof net 34 need to be removed, and then the interior of the ventilation system can be repaired, and the repair efficiency is increased by 50%.

[0050] In areas with more snow in the north, the left and right sides of the snow-proof net 34 are installed below the upper rain-proof plates 31 to increase strength and compressive capacity, avoiding deformation of the snow-proof net due to too thick snow accumulation and tearing from the screw holes, ensuring safe use.

[0051] The middle rain shield 32 of the rain and snow protection unit is made of a light-transmitting material, arched upwards in the middle, and its left and right sides are connected and fixed to the middle shield bracket by clips 321. The middle shield bracket is fixed on the horizontal shoulder 13 of the two brackets 1, forming a nail-hole-free installation structure for the middle rain shield, avoiding the leakage risk of traditional drilling installation. The material of the middle rain shield 32 can be polycarbonate, and its light transmittance can be selected as direct or diffused type according to the needs. The diffused type can eliminate glare from direct sunlight.

[0052] The bottom drainage channels 33 are installed on the steel profile 2 via the bracket 1. The bottom drainage channels 33 are evenly distributed in the horizontal direction, with gaps between them as ventilation channels. The number of bottom drainage channels 33 can be set according to the size of the openings in the roof. The left and right sides of the bottom drainage channels 33 are folded upwards to store and drain water.

[0053] like Figure 9 As shown, side snow shields 7 are installed between adjacent brackets 1. The side snow shields 7 are located below the middle rain shield 32 and are used to prevent snowflakes from entering the room through the gaps under the middle rain shield 32.

[0054] like Figures 8 to 9 As shown, both the bracket 1 and the bottom drainage channel 33 are supported by steel profiles 2 and covered by an outer protective plate 8. Specifically, an outer protective plate bracket 81 is installed on the bracket 1 and fixed with self-tapping screws; the outer protective plate 8 is installed on the outer protective plate bracket 81 and fixed with self-tapping screws. An outwardly inclined flashing 9 is also installed on the steel profile 2 to seal the roof joints and guide rainwater outward. More specifically, the flashing 9 is installed between the steel profile and the bottom drainage channel.

[0055] In applications such as precision instrument workshops, the upper rain shield 31 and movable valve plate 4 are equipped with a removable insulation layer. The insulation layer can be, but is not limited to, 50mm thick insulation cotton. The insulation layer is fixed to the lower surface of the rain shield 31 and movable valve plate 4 by metal strips. The insulation layer, together with the sealing valve plate, controls the indoor temperature fluctuation within ±2℃ in winter, meeting the constant temperature requirement. The heat transfer coefficient is reduced by 40% in winter, which meets the building energy conservation standards.

[0056] The working principle is as follows:

[0057] In ventilation mode, the electric push rod 51 extends, driving the valve plate transmission rod 52 to slide along the guide rail 54. The movable valve plate 4 moves to the lower part of the upper rain shield 31, the ventilation path is opened, and the hot air in the workshop is discharged through the S-shaped siphon channel (ventilation path 10) formed by the gap of the bottom drainage groove 33, the gap of the middle rain shield 32, and the gap of the upper rain shield 31. Fresh air from the outside is replenished from the perimeter of the roof.

[0058] In rain and snow protection mode, after detecting rain and snow signals, the electric push rod 51 retracts, the valve plate moves horizontally to below the snow net 34, the two ends are embedded in the grooves of the guide rail 54, the side partially overlaps with the upper rain shield 31, and the guide channel 41 guides the rainwater to the drainage channel, completely blocking rain and snow from entering.

[0059] In the heat preservation mode, during winter, removable heat insulation cotton is added to the lower surface of the movable valve plate 4 and the upper rainproof plate 31. Together with the closed movable valve plate 4, a heat preservation layer is formed to reduce indoor heat loss.

[0060] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A roof lighting and ventilation system for a factory or warehouse, characterized in that, include: The rain and snow protection unit includes an upper rain shield, a middle rain shield, and a bottom drainage channel arranged in layers. The upper rain shields, the middle rain shields, and the bottom drainage channels in each layer are spaced apart. The middle rain shield covers the gap directly above the bottom drainage channel, and the upper rain shield covers the gap directly above the middle rain shield, forming at least three layers of staggered ventilation paths. The rain and snow protection unit also includes a snow net, which is fixedly installed close to the upper rainproof board and is arranged alternately with the upper rainproof board; The rain and snow protection unit also includes a movable valve plate, which is located on the upper part of the rain and snow protection unit and installed close to the upper rain shield and snow net. It is controlled by a drive mechanism to move along a straight line and is used to dynamically open and close the ventilation path. The brackets, fixed in an array on the steel profile, are used to support the rain and snow protection unit and the movable valve plate.

2. The factory or warehouse roof lighting and ventilation system according to claim 1, characterized in that, The two sides of the snow net can be selectively installed above or below the upper rainproof board.

3. The factory or warehouse roof lighting and ventilation system according to claim 1, characterized in that, The driving mechanism includes an electric push rod, a valve plate transmission rod, a pulley block, and a guide rail. The valve plate transmission rod connects the movable valve plates into a whole and is driven to translate by the electric push rod. The pulley block installed on the valve plate transmission rod is rolled and embedded in the guide rail, guiding the valve plate transmission rod to slide along the guide rail.

4. The factory or warehouse roof lighting and ventilation system according to claim 3, characterized in that, The movable valve plate is embedded in the guide rails at both ends. When closed, the side of the movable valve plate closely overlaps with the upper rain shield, so that the movable valve plate blocks the ventilation path and forms a sealed fit with the upper rain shield when closed. The movable valve plate is provided with several guide grooves extending in the front-back direction.

5. The factory or warehouse roof lighting and ventilation system according to claim 3, characterized in that, The guide rail includes a main body and guide grooves located on the left and right sides of the main body. The guide grooves are lowered on the side away from the main body to install the valve plate transmission rod and to guide rainwater. The valve plate transmission rod is equipped with pulley sets on its side and bottom, and the two sets of pulley sets are in rolling contact with the bottom and sidewall of the guide groove, respectively.

6. The factory or warehouse roof lighting and ventilation system according to claim 1, characterized in that, The bracket includes a vertical support, a diagonal brace, and a horizontal shoulder. The vertical support is fixed to the steel profile. The upper end of the vertical support is bent inward to form the horizontal shoulder, which supports the middle rain shield. The diagonal brace is a honeycomb-shaped component formed by extending the inner side of the horizontal shoulder upward and downward respectively. The diagonal brace supports the upper rain shield and the movable valve plate.

7. The factory or warehouse roof lighting and ventilation system according to claim 6, characterized in that, The middle rain shield is made of a light-transmitting material and is fixed to the middle baffle bracket by a snap-fit ​​connection. The middle baffle bracket is fixed to the horizontal shoulder of the bracket, forming a nail-free installation structure for the middle rain shield.

8. The factory or warehouse roof lighting and ventilation system according to any one of claims 1 to 7, characterized in that, Side snow shields are installed between the brackets. The side snow shields are located below the middle rain shield and are used to prevent snowflakes from entering the room through the gaps under the middle rain shield.

9. The roof lighting and ventilation system for factory buildings or warehouses according to any one of claims 1 to 7, characterized in that, The bracket and bottom drainage channel are both fixedly supported by steel profiles, and the bracket, movable valve plate and rain and snow protection unit are covered and fixed by an outer protective plate. Outwardly inclined flashing is installed around the perimeter of the steel profile to seal roof joints and guide rainwater outward; the flashing is installed between the steel profile and the bottom drainage channel.

10. The factory or warehouse roof lighting and ventilation system according to any one of claims 1 to 7, characterized in that, The upper rain shield and movable valve plate are equipped with a removable insulation layer.

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