A stepped drainage structure of a multi-channel seal of a building skylight

Abstract

The present application relates to the technical field of skylight, disclose a kind of building skylight multi-channel sealing's ladder drainage structure, including chassis, further include being provided with two and being rotatably connected in the top end of chassis mounting bracket, glass sheet is arranged in the inside of mounting bracket, it is provided with two respectively located left and right sides of chassis guide inclined plate, slidingly connected in the inside of mounting bracket link frame, one end is rotatably connected with link frame rocker, rotatably connected in the other end of rocker disc, soft brush strip is attached with glass sheet, when mounting bracket rotates, through disc makes soft brush strip to glass sheet surface treatment.Cleaning glass sheet surface in two directions by disc moving under the action of gravity and pressing strip extrusion, link frame and soft brush strip drive during skylight opening and closing process, reduce artificial maintenance cost and high-altitude operation risk, avoid that water and pollutant mix and corrode skylight material, effectively and quickly process glass sheet surface, improve the drainage efficiency and service life of skylight.

Description

Technical Field

[0001] This invention relates to the technical field of skylights, and more particularly to a stepped drainage structure with multiple seals for a building skylight. Background Technology

[0002] In the field of industrial buildings, rooftop skylights serve as important facilities that combine lighting and smoke extraction, while also enabling indoor and outdoor air exchange, improving indoor air quality, and maintaining indoor temperature within a suitable range.

[0003] However, in existing technologies, many factory areas are surrounded by heavy industrial production activities, such as steel smelting and cement manufacturing, which generate a large amount of fine dust during the production process. This dust is dispersed by the wind and easily adheres to the surface of the skylight, forming stubborn stains. This not only reduces light transmittance but also shortens the lifespan of the skylight. At the same time, since skylights are mostly made of smooth tempered glass or PC panels, although these materials have good light transmittance and smooth surfaces, rainwater flows quickly across the surface and cannot effectively wet and dissolve pollutants. Instead, it will spread the dust and other pollutants evenly, forming large areas of watermarks. In addition, the flat surface of most skylight glass results in the lack of drainage guidance structures, causing rainwater to be unable to flow quickly to the drainage channel. The accumulated water reacts chemically with sulfides and nitrogen oxides in industrial dust to form an acidic liquid, which severely damages the glass coating and the UV-resistant coating of the PC board. After the water evaporates, it leaves watermarks that are difficult to remove on the surface of the skylight. On the other hand, the existing skylight glass surface is flat, which makes it easy for rainwater to adhere to the surface. This causes the accumulated water to mix with pollutants in the air to form a corrosive liquid, which not only corrodes the skylight material but also forms mottled stains on the surface. These watermarks and stains further reduce the light transmittance of the skylight and affect the uniformity of light in the factory area. Moreover, the long-term retention of water will cause the mechanical parts of the skylight to become damp and rust, increasing the risk of the skylight jamming and seriously affecting the normal use of the smoke exhaust function. However, due to the high position of the skylight, the operation is risky. Routine maintenance requires workers to use high-altitude work equipment. At the same time, due to the large area, complex structure, and large number of skylights, comprehensive cleaning is difficult and requires a lot of manpower and time. Maintenance is usually carried out every two months, making it difficult to effectively treat the surface of the skylight. Summary of the Invention

[0004] The purpose of this invention is to provide a stepped drainage structure with multiple seals for skylights in buildings, thereby solving the problem of skylights not being able to be maintained in a timely manner.

[0005] The technical solution of the present invention is as follows: a stepped drainage structure for multi-seal skylights in buildings, including a base frame, two mounting brackets rotatably connected to the top of the base frame, a glass plate disposed inside the mounting brackets, two guide inclined plates respectively located on the left and right sides of the base frame, a connecting frame slidably connected inside the mounting brackets, a flexible brush strip fixedly connected to the connecting frame, a rocker arm rotatably connected to the connecting frame at one end, a disc rotatably connected to the other end of the rocker arm, a telescopic rod connecting the mounting brackets and the base frame, and a filter screen fixedly disposed at the bottom of the base frame. The top of the base frame has an inclined air vent. The mounting brackets are mirror-symmetrical about the central axis of the base frame. The flexible brush strips are in contact with the glass plate. When the mounting brackets rotate, the flexible brush strips treat the surface of the glass plate through the disc.

[0006] Furthermore, a sealing plate is provided on one side of the mounting frame, and a pressure strip is provided inside the sealing plate. Both ends of the pressure strip are arc-shaped. A guide groove and a straight groove are provided on the mounting frame. The guide groove is parallel to the pressure strip and perpendicular to the straight groove. One end of the connecting frame passes through the guide groove.

[0007] Furthermore, the top of the guide ramp is a sliding surface, the length of which is equal to that of the pressure strip, the diameter of the disc is not less than one-quarter of the length of the sliding surface, and the surfaces of the sliding surface and the pressure strip are smoothed.

[0008] Furthermore, the connecting frame includes a straight frame slidably connected inside the mounting bracket, a round shaft fixedly connected to one side of the straight frame, and a semi-groove sleeve fixedly sleeved outside the round shaft. The round shaft passes through a guide groove, and one end of the rocker arm is rotatably connected to the outside of the round shaft.

[0009] Furthermore, a protruding strip is provided on the side of the rocker arm near the semi-groove sleeve. The protruding strip is located inside the groove of the semi-groove sleeve, and the groove opening angle of the semi-groove sleeve is the same as the rotation angle of the mounting bracket.

[0010] Furthermore, the mounting bracket has a straight plate inside, the surface of which is treated with high friction and the top is curved.

[0011] Furthermore, multiple semicircular strips are equidistantly arranged on the glass plate, and the left and right sides of the semicircular strips form a water guiding surface with the mounting frame.

[0012] Furthermore, when the mounting bracket closes the slanted air inlet, the connecting frame is located inside the straight slot.

[0013] Furthermore, the two guide ramps are respectively located at the sealing plate location of the mounting frame. When the mounting frame is vertical, the disc is tangent to the guide ramp and the guide groove.

[0014] Furthermore, the sliding surface and the inclined air vent have the same tilt angle, and when the mounting bracket closes the inclined air vent, the pressure strip is in contact with the sliding surface.

[0015] The beneficial effects of this invention are: 1. During the opening and closing of the sunroof, the disc moves back and forth under the pressure of gravity and the pressure strip, driving the connecting frame and soft brush strip to clean the surface of the glass in both directions. The semi-circular strip of the glass helps the brush strip to adhere to the surface, while guiding the dirt to the water guide surface. Compared with the traditional manual cleaning method of sunroof, it can improve cleaning efficiency, reduce manual maintenance costs and the risks of high-altitude operations, avoid water accumulation and pollutants from mixing and corroding the sunroof material, effectively and quickly treat the surface of the glass, and improve the drainage efficiency and service life of the sunroof.

[0016] 2. The installation frame is rotated by a telescopic rod, which drives the soft brush strip with a rocker arm. Cleaning, ventilation and drainage functions are integrated into one control. The opening, closing and automatic cleaning of the sunroof can be achieved by the extension and retraction of a single telescopic rod. There is no need to control multiple independent components separately, which greatly simplifies the control process and significantly improves the ease of use.

[0017] 3. By using pressure strips as the pushing structure and connecting frames as the single transmission structure, and moving in a straight line in a reciprocating motion, the complex movement path is avoided, the coordination between structures is reduced, thereby reducing installation difficulty and shortening installation time. Moreover, without the need for professional tools and complicated operations, vulnerable parts such as soft brush strips and filters can be quickly replaced, improving maintenance efficiency, reducing maintenance costs, and enhancing the long-term availability and adaptability of the equipment. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram from a first perspective of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the mounting bracket of the present invention; Figure 4 This is a schematic diagram of the connecting frame structure of the present invention; Figure 5 This is a schematic diagram of the structure of the disk of the present invention; Figure 6 This is a schematic diagram of the structure of the glass sheet of the present invention; Figure 7 For the present invention Figure 1 Enlarged view of point A in the middle; Figure 8 This is a front view of the base frame of the present invention.

[0019] In the picture: 1. Base frame; 101. Slanted air vent; 2. Mounting bracket; 21. Sealing plate; 22. Pressure strip; 23. Guide groove; 24. Straight groove; 25. Straight plate; 3. Glass plate; 31. Semicircular strip; 32. Water guide surface; 4. Guide slant plate; 41. Smooth surface; 5. Connecting frame; 51. Straight frame; 52. Round shaft; 53. Semi-groove sleeve; 6. Soft brush strip; 7. Rocker arm; 71. Raised strip; 8. Disc; 9. Telescopic rod; 10. Filter screen. Detailed Implementation

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Reference Figures 1-8 This invention provides a stepped drainage structure for a multi-seal skylight in a building, comprising a base frame 1, two mounting brackets 2 rotatably connected to the top of the base frame 1, a glass sheet 3 disposed inside the mounting brackets 2, two guide ramps 4 located on the left and right sides of the base frame 1, a connecting frame 5 slidably connected inside the mounting brackets 2, a flexible brush strip 6 fixedly connected to the connecting frame 5, a rocker arm 7 rotatably connected at one end to the connecting frame 5, a disc 8 rotatably connected to the other end of the rocker arm 7, a telescopic rod 9 connecting the mounting brackets 2 and the base frame 1, and a filter screen 10 fixedly disposed at the bottom of the base frame 1. The top of the base frame 1 has an inclined air vent 101. The mounting brackets 2 are mirror-symmetrical about the central axis of the base frame 1. The flexible brush strips 6 are in contact with the glass sheet 3. When the mounting brackets 2 rotate, the disc 8 causes the flexible brush strips 6 to treat the surface of the glass sheet 3.

[0022] Specifically, the mounting frame 2 provides a stable installation for the glass sheet 3. The two glass sheets 3 serve as the main light-transmitting elements, ensuring sufficient natural light enters the factory area. The mounting frame 2 can rotate by extending and retracting the telescopic rod 9, supported by the base frame 1. This allows control of the opening and closing of the slanted air vent 101. When the mounting frame 2 rotates, the disc 8 moves downward under the pull of gravity, causing the connecting frame 5 to slide linearly within the mounting frame 2. This allows the soft brush strip 6, which is fixedly connected to the connecting frame 5, to move closely against the surface of the glass sheet 3, effectively and promptly treating dust, watermarks, and other stains on the surface of the glass sheet 3.

[0023] Reference Figures 1-3 A sealing plate 21 is provided on one side of the mounting frame 2. A pressure strip 22 is provided inside the sealing plate 21. Both ends of the pressure strip 22 are arc-shaped. The mounting frame 2 is provided with a guide groove 23 and a straight groove 24. The guide groove 23 is parallel to the pressure strip 22 and perpendicular to the straight groove 24. One end of the connecting frame 5 passes through the guide groove 23. The connecting frame 5 is guided by the guide groove 23 and can only move along the path of the guide groove 23.

[0024] Specifically, since the two mounting brackets 2 are mirror-symmetrical, two sealing plates 21 are provided on the two mounting brackets 2. The sealing plates 21 are located on different sides of the two mounting brackets 2, that is, one sealing plate 21 is on the left side of one mounting bracket 2 and the other sealing plate 21 is on the right side of the other mounting bracket 2. The inner walls of the guide slot 23 and the straight slot 24 are ground to reduce their surface roughness and ensure that the connecting frame 5 slides smoothly.

[0025] Reference Figures 1-7 The top of the guide plate 4 is a sliding surface 41, which is equal in length to the pressure strip 22. The diameter of the disc 8 is not less than one-quarter of the length of the sliding surface 41. The surfaces of the sliding surface 41 and the pressure strip 22 are smooth. The sliding surface 41 and the inclined air outlet 101 have the same inclination angle, which can be ten degrees. When the mounting bracket 2 is vertical, the angle between the mounting bracket 2 and the inclined air outlet 101 is eighty degrees. When the mounting bracket 2 closes the inclined air outlet 101, the pressure strip 22 and the sliding surface 41 fit together to form a seal. At the same time, the sealing plate 21 can directly seal the pressure strip 22 and the sliding surface 41, reducing the external influence on the surfaces of both.

[0026] Specifically, the guide ramp 4 and the disc 8 are both made of stainless steel to ensure a smooth surface, while the pressure strip 22 is also made of hard material. The pressure strip 22 rotates and squeezes, causing the disc 8 to move smoothly back along the guide trajectory of the sliding surface 41. At this time, the rocker arm 7 will drive the connecting frame 5 to move in a straight line in the guide groove 23, thereby causing the soft brush strip 6 to move back in close contact with the surface of the glass plate 3.

[0027] In addition, during routine maintenance, it is usually necessary to perform simultaneous maintenance on the pressure strip 22, the sliding surface 41, and the disc 8 to ensure the smoothness of the surface. This device is usually used after rain, and the rainwater can impact the surface of the disc 8 to ensure the smoothness of the disc 8 and prevent jamming. At the same time, it can provide ventilation after rain and effectively treat the water marks after rain.

[0028] When the disc 8 is located between the sliding surface 41 and the pressure strip 22, the sliding surface 41 and the pressure strip 22 cannot fit together, and the inclined air vent 101 cannot be closed. The diameter of the disc 8 is not less than one-quarter of the length of the sliding surface 41. At the same time, the pressure strip 22 and the sliding surface 41 form a V-shaped angle. At this time, if the length of the sliding surface 41 is forty, the diameter of the disc 8 is at least ten. Since the maximum angle of the V-shaped angle is eighty degrees, and the diameter of the disc 8 is always smaller than the opening width of the V-shaped angle, it will always move under pressure. At the same time, when the disc 8 is located at the bottom of the angle, since the diameter of the disc 8 is at least ten, the sliding surface 41 and the pressure strip 22 cannot form an effective clamping force. As a result, the distance that the disc 8 moves after being pressed is greater than the length of the sliding surface 41, ensuring that the disc 8 has sufficient clearance when sliding in the inclined direction of the sliding surface 41, thereby avoiding interference caused by the disc 8 being too small and getting stuck.

[0029] Reference Figures 2-5 The connecting frame 5 includes a straight frame 51 that is slidably connected inside the mounting frame 2, a round shaft 52 that is fixedly connected to one side of the straight frame 51, and a semi-groove sleeve 53 that is fixedly sleeved outside the round shaft 52. The round shaft 52 passes through the guide groove 23, and one end of the rocker arm 7 is rotatably connected to the outside of the round shaft 52.

[0030] Specifically, the straight frame 51, the round shaft 52, and the semi-groove sleeve 53 are all made of aluminum alloy. The semi-groove sleeve 53 is CNC milled, and the round shaft 52 is fixed to the straight frame 51 by welding. Meanwhile, the surface of the straight frame 51 is anodized to effectively resist acid and alkali corrosion in the industrial environment. The internal hollow structure of the straight frame 51 uses a reinforcing rib structure to ensure its rigidity while reducing the overall weight and ensuring that it is not easily deformed during reciprocating sliding. At the same time, the mounting bracket 2 has a guide groove on the other side of the guide groove 23, giving the straight frame 51 double guidance and ensuring stability. Under the constraint of the guide groove 23, the straight frame 51 can achieve low resistance and high speed. The stable linear reciprocating motion, the solid structure of the disc 8, the downward pull of the disc 8 by gravity, the rocker arm 7 pulls the circular shaft 52 under the action of the disc 8, so that the straight frame 51 drives the soft brush strip 6 to move. Similarly, when the disc 8 moves back along the sliding surface 41 of the guide inclined plate 4 under the pressure of the pressure strip 22, the force is transmitted to the circular shaft 52 through the rocker arm 7. The circular shaft 52 drives the straight frame 51 to make linear reciprocating motion in the guide groove 23. At this time, the semi-groove sleeve 53 moves synchronously with the circular shaft 52. The linear motion of the straight frame 51 drives the soft brush strip 6 fixedly connected to it to perform back-and-forth cleaning on the surface of the glass plate 3, so as to achieve efficient cleaning of the skylight surface.

[0031] Reference Figures 2-6A protrusion 71 is provided on the side of the rocker arm 7 near the semi-groove sleeve 53. The protrusion 71 is located in the groove of the semi-groove sleeve 53. The groove opening angle of the semi-groove sleeve 53 is the same as the rotation angle of the mounting bracket 2. The protrusion 71 is restricted by the semi-groove sleeve 53, so that the rocker arm 7 restricts the disk 8 and avoids the disk 8 from rotating excessively.

[0032] Reference Figures 2-6 The mounting bracket 2 has a straight plate 25 inside. The surface of the straight plate 25 is treated with high friction and the top is set to be arc-shaped. When the mounting bracket 2 closes the inclined air vent 101, the connecting frame 5 is located inside the straight groove 24.

[0033] Specifically, when the soft brush strip 6 comes into contact with the straight plate 25, it will be deformed by the pressure of the straight plate 25, thereby removing the moisture inside the soft brush strip 6. At the same time, the friction of the straight plate 25 will remove impurities from the surface of the soft brush strip 6.

[0034] Reference Figures 1-7 The glass sheet 3 has multiple semicircular strips 31 spaced at equal intervals, forming a multi-step structure, which makes it difficult for rainwater to stay on the surface of the glass sheet 3. At the same time, the left and right sides of the semicircular strips 31 form a water guiding surface 32 between the mounting frame 2 and the mounting frame 2. The height of the water guiding surface 32 is lower than that of the semicircular strips 31.

[0035] The soft brush strip 6 is made of a mixed material to ensure the flexibility of the main body. It can deform when it comes into contact with the semi-circular strip 31, which can effectively remove stubborn stains from the glass surface without scratching the glass. At the same time, the soft brush strip 6 can better fit the surface of the glass sheet 3, improving the surface cleaning effect.

[0036] Specifically, multiple semicircular strips 31 can form a stepped height difference, guiding rainwater to slide down quickly without excessively affecting the overall light transmittance of the glass sheet 3. This greatly reduces the adhesion of rainwater, allowing it to roll off rapidly under gravity. It also needs to work in conjunction with the water-guiding surface 32 to prevent rainwater from lingering and accumulating on the surface of the glass sheet 3. When rainwater falls on the surface of the glass sheet 3, it preferentially flows rapidly to both sides along the arc-shaped slope of the semicircular strips 31, converging at the water-guiding surface 32. There, it forms a continuous flow path with the sliding surface 41 of the guide ramp 4, allowing the rainwater to flow on the water-guiding surface 32. At the same time, the water will be quickly discharged from the skylight along the tilt angle of the guide plate 4 to avoid water accumulation. Meanwhile, the soft brush strip 6 slides along the surface of the glass sheet 3 under the drive of the connecting frame 5. The arc shape of the semi-circular strip 31 can help the brush strip to cover the glass surface more comprehensively and effectively remove the stains attached to the grooves and slopes. At the same time, the mechanical force generated when the brush strip comes into contact with the semi-circular strip 31 will remove the dirt. In addition, the multi-step structure formed by the semi-circular strip 31 can also disperse the impact of wind on the glass sheet 3 to a certain extent and improve the overall wind pressure resistance of the skylight.

[0037] Reference Figures 1-8Two guide ramps 4 are located at the sealing plate 21 on the mounting frame 2, ensuring that the corresponding disc 8 can be guided by the guide ramps 4. When the mounting frame 2 is vertical, the disc 8 is tangent to the guide ramps 4 and the guide groove 23.

[0038] The working principle of this invention is as follows: When the skylight is initially closed, the two mounting brackets 2, with the central axis of the base frame 1 as the center of symmetry, cooperate to completely seal the corresponding inclined air vents 101. At this time, the pressure strip 22 inside the sealing plate 21 on one side of the mounting bracket 2 is tightly fitted with the sliding surface 41 at the top of the guide inclined plate 4, forming multiple sealing lines to effectively prevent rainwater leakage and the entry of external pollutants. When the skylight is opened, the telescopic rod 9 starts to extend, and with the base frame 1 as support, it pushes the two mounting brackets 2 to rotate synchronously. As the mounting brackets 2 rotate, As the slanted vent 101 gradually opens, the rotating mounting bracket 2 moves downwards due to the gravity of the disc 8. When the disc 8 slides, the rocker arm 7 pulls the straight frame 51 connected to the circular shaft 52, causing the circular shaft 52 to slide linearly under the constraint of the guide groove 23. Since the flexible brush strip 6 is fixedly connected to the connecting frame 5, it moves close to the surface of the glass plate 3, cleaning dust, watermarks, and other stains on the glass plate 3 after rain. Simultaneously, the multi-step structure formed by the semi-circular strips 31 on the surface of the glass plate 3 assists in cleaning the flexible brush strip. The flexible brush strip 6 better conforms to the glass surface, guiding the dirt generated during cleaning to the water guiding surface 32. Simultaneously, the thick, high-friction surface of the straight plate 25 presses against the passing flexible brush strip 6, removing internal moisture and surface impurities. When the skylight needs to be closed again after several tens of minutes of opening, the telescopic rod 9 retracts, causing the mounting bracket 2 to rotate in the opposite direction. During the rotation of the mounting bracket 2 back to its original position, the disc 8 is located at the bottom of the included angle. The pressure strip 22 gradually approaches the sliding surface 41 as the mounting bracket 2 rotates, and... The disc 8 on the sliding surface 41 generates a squeezing force. Since the pressure strip 22 is at an inclined angle to the sliding surface 41, during the squeezing process, the disc 8 moves back along the sliding surface 41. At the same time, the rocker arm 7 drives the round shaft 52 to move in the opposite direction in the guide groove 23. The soft brush strip 6 performs a second treatment on the surface of the glass sheet 3 to absorb rainwater. When the mounting bracket 2 is fully returned to its original position and closes the inclined air vent 101, the pressure strip 22 and the sliding surface 41 are tightly fitted again to form a seal, which can effectively reduce watermarks and dirt.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A stepped drainage structure with multiple seals for a building skylight, comprising a base frame (1), characterized in that: It also includes two mounting brackets (2) rotatably connected to the top of the base frame (1), a glass plate (3) inside the mounting bracket (2), two guide ramps (4) located on the left and right sides of the base frame (1), a connecting frame (5) slidably connected inside the mounting bracket (2), a soft brush strip (6) fixedly connected to the connecting frame (5), a rocker (7) rotatably connected to the connecting frame (5) at one end, a disc (8) rotatably connected to the other end of the rocker (7), a telescopic rod (9) connecting the mounting bracket (2) and the base frame (1), and a filter screen (10) fixedly set at the bottom of the base frame (1). The top of the base frame (1) is provided with a slanted air vent (101). The mounting bracket (2) is mirror symmetrical about the central axis of the base frame (1). The soft brush strip (6) is in contact with the glass plate (3). When the mounting bracket (2) rotates, the soft brush strip (6) treats the surface of the glass plate (3) through the disc (8). A sealing plate (21) is provided on one side of the mounting bracket (2), and a pressure strip (22) is provided inside the sealing plate (21). Both ends of the pressure strip (22) are arc-shaped. A guide slot (23) and a straight slot (24) are provided on the mounting bracket (2). The guide slot (23) is parallel to the pressure strip (22), and the guide slot (23) is perpendicular to the straight slot (24). One end of the connecting frame (5) passes through the guide slot (23). The connecting frame (5) includes a straight frame (51) slidably connected inside the mounting frame (2), a round shaft (52) fixedly connected to one side of the straight frame (51), and a semi-groove sleeve (53) fixedly sleeved outside the round shaft (52). The round shaft (52) passes through the guide slot (23), and one end of the rocker arm (7) is rotatably connected to the outside of the round shaft (52). The rocker arm (7) has a protrusion (71) on the side near the half-groove sleeve (53). The protrusion (71) is located in the groove of the half-groove sleeve (53). The groove angle of the half-groove sleeve (53) is the same as the rotation angle of the mounting bracket (2).

2. The stepped drainage structure with multiple seals for building skylights according to claim 1, characterized in that: The top of the guide plate (4) is a sliding surface (41), the length of the sliding surface (41) is equal to that of the pressure strip (22), the diameter of the disc (8) is not less than one-quarter of the length of the sliding surface (41), and the surfaces of the sliding surface (41) and the pressure strip (22) are smooth.

3. The stepped drainage structure with multiple seals for building skylights according to claim 2, characterized in that: The mounting bracket (2) has a straight plate (25) inside, the surface of the straight plate (25) is treated with high friction and the top is set to be arc-shaped.

4. The stepped drainage structure with multiple seals for building skylights according to claim 1, characterized in that: Multiple semicircular strips (31) are equidistantly arranged on the glass plate (3), and water guiding surfaces (32) are formed between the left and right sides of the semicircular strips (31) and the mounting frame (2).

5. The stepped drainage structure with multiple seals for building skylights according to claim 3, characterized in that: When the mounting bracket (2) closes the inclined air vent (101), the connecting frame (5) is located inside the straight slot (24).

6. The stepped drainage structure with multiple seals for building skylights according to claim 1, characterized in that: The two guide ramps (4) are respectively located at the sealing plate (21) of the mounting frame (2). When the mounting frame (2) is vertical, the disc (8) is tangent to the guide ramps (4) and the guide groove (23).

7. The stepped drainage structure with multiple seals for building skylights according to claim 2, characterized in that: The sliding surface (41) and the inclined air vent (101) have the same inclination angle. When the mounting bracket (2) closes the inclined air vent (101), the pressure strip (22) fits against the sliding surface (41).

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