CN114197723A

CN114197723A - Roof system

Info

Publication number: CN114197723A
Application number: CN202111593249.4A
Authority: CN
Inventors: 邢超; 毕晓健; 刘慧�; 初腾飞; 金莉
Original assignee: Ccdi Beijing International Building Design Consulting Co ltd
Current assignee: Ccdi Beijing International Building Design Consulting Co ltd
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-03-18

Abstract

The invention discloses a roof system, which relates to the field of buildings and comprises a roof main body and a top cover, wherein the roof main body is provided with a top wall, the top wall is an annular wall, and an opening is enclosed by the annular wall; the top cover comprises a plurality of top cover units, the top cover is arranged on the top wall, the top cover units are arranged along the center circumference of the opening, and the top cover units can rotate in the plane where the top wall is located relative to the top wall so as to close or open the opening; the difference between the radius of the outer edge and the radius of the inner edge in the top wall is a first length; the top cover unit is partially overlapped with the top wall, and the width of the overlapped part of the top wall and the top cover unit in the radial direction of the top wall is a second length; the radius of the inner edge of the top wall is a third length; the first length is between 1.19 and 1.3 in comparison with the second length, and the second length is between 0.76 and 0.84 in comparison with the third length, and the invention has the effect of reducing the probability that the retractable roof collides with each other during the opening and closing process.

Description

Roof system

Technical Field

The invention relates to the technical field of buildings, in particular to a roof system.

Background

At present, the most representative of the case-type phoenix unicorn angles of large-scale sports or cultural buildings adopting a plurality of (more than or equal to 4 pieces of openable and closable roof covers) openable and closable roof covers at home and abroad are a plurality of rotary type openable and closable roof covers and a plurality of translational type openable and closable roof covers. Because the technical difficulty of the retractable roof is great, even if different building models adopt the same or similar retractable systems, the building logics, the building systems and the technical details to be solved are different essentially, and therefore the retractable roof is always unique.

Besides the technical difficulty of opening and closing the roof, a series of very important points are provided: the waterproof and drainage problems of the roof are guaranteed to be implemented no matter in the opening, closing or moving states, and the sealing problem in the closing state (when the closing state of the building is required to be a pure indoor space) is particularly important. If the problem is solved improperly, a series of problems such as the normal operation of an open-close roof, unsmooth drainage of the roof, serious water leakage of the roof, incapability of achieving the effect of a fully-closed indoor space in a closed state and the like can occur.

In the process of realizing the above, at least the following problems exist: in the process of opening and closing the opening and closing roof, the multiple opening and closing roofs are easy to collide with each other in the moving process, so that the normal operation of the opening and closing roofs is influenced.

Disclosure of Invention

Embodiments of the present invention provide a roof system having an effect of reducing collision between opening and closing of an openable and closable roof with each other in the opening and closing processes of the openable and closable roof.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

a roof system comprises a roof main body and a top cover, wherein the roof main body is provided with a top wall which is an annular wall, and an opening is surrounded by the annular wall; the top cover comprises a plurality of top cover units, the top cover is arranged on the top wall, the top cover units are arranged along the center circumference of the opening, and the top cover units can rotate in a plane where the top wall is located relative to the top wall, so that the top cover units are spliced or separated to enable the opening to be closed or opened; the difference between the radius of the outer edge and the radius of the inner edge in the top wall is a first length; the top cover unit is partially overlapped with the top wall, and the width of the overlapped part of the top wall and the top cover unit in the radial direction of the top wall is a second length; the radius of the inner edge of the top wall is a third length; the first length is between 1.19 and 1.3 greater than the second length, and the second length is between 0.76 and 0.84 greater than the third length.

According to the roof system provided by the embodiment of the invention, the top wall of the roof main body is the annular wall, the plurality of top cover units can rotate on the roof main body, and the plurality of top cover units can rotate from the state that the openings are opened to the state that the openings are closed when rotating, so that the regulation of lighting and ventilation in the roof system is realized. The lighting and ventilation are increased in the process of gradually opening the opening, and the lighting and ventilation are reduced in the process of gradually closing the opening; the ratio of the first length to the second length, and the ratio between the second length to the third length reduces the probability of a collision when rotating.

Further, the number of the top cover units is six to ten.

The number of cover units is preferably between six or ten when turning.

Further, the number of the top cover units is eight.

The eight top cover units can ensure that the eight top cover units cannot collide in the rotating process while ensuring the symmetry.

Further, the top cover unit includes a main body portion, a first side edge portion and a second side edge portion; the first side edge portion and the second side edge portion are respectively located on two sides of the main body portion in the circumferential direction of the opening; the first side edge part comprises a first section and a second section which are connected, the first section and the second section are both arc sections, and the arc openings of the first section and the second section are opposite in direction; the second side edge portion is adapted to the first side edge portion, and the second side edge portion is matched with the first side edge portion of the adjacent top cover unit when the plurality of top cover units are closed.

First side limit portion and second side limit portion are located the both sides of main part respectively, and first side limit portion is similar with second side limit portion, and first section and second section on the first side limit portion have reserved the surplus for the rotation of top cap unit for setting up of arc section, guarantee that top cap unit can not bump at pivoted process.

Further, the first section is a section near a center of the ring structure in one side of the main body portion, and a radius of curvature of the first section is 27.9 to 28.1 meters.

The first section having a radius of curvature of between 27.9 and 28.1 meters reduces the probability of the cover units colliding with each other when rotated.

Further, the second section is a section away from the center of the ring structure in one side of the main body portion, and the radius of curvature of the second section is 19.6 meters to 19.8 meters.

The second section having a radius of curvature of between 19.6 and 19.8 meters reduces the probability of the roof units colliding with each other when rotated.

Further, in a rotation direction of the top cover unit relative to the top wall, the first side edge portion is located at a front end of the main body portion, and the second side edge portion is located at a rear end of the main body portion; the roof system further comprises a rotating shaft, the rotating shaft is arranged between the top cover unit and the top wall, and the top cover unit is located at the end portion, far away from the center of the opening, of the second side edge portion compared with the rotating axis of the top wall.

The top cover unit can rotate along the direction that the pivot set up, and the pivot has realized the rotation of top cover unit on the roof between top cover unit and roof.

Further, the top cover unit is arranged from one end close to the center of the opening to one end far away from the center of the opening in an inclined and downward mode.

Because one end of the top cover unit close to the center of the opening is higher than the other end far away from the center of the opening, the end part of the top cover unit close to the center of the opening has a height difference with other parts of the top cover unit except the part close to the center of the opening. Therefore, when the top cover unit rotates, the end part of the top cover unit close to the center of the opening can be dislocated with the part of the adjacent top cover unit except the center of the opening, and the probability of collision between the top cover unit and the adjacent top cover unit is further reduced.

Furthermore, a connecting line between the rotating shaft and the end part of the top cover unit close to the opening is a first connecting line, an orthographic projection of the first section on the first connecting line is a first projection, an orthographic projection of the second section on the first connecting line is a second projection, and the length of the first projection is 1.25-1.41 longer than that of the second projection.

The ratio of the first projection to the second projection is the proportion of the first section and the second section occupying the first side edge part, and the arrangement of the proportion further ensures that the roof unit cannot collide with the adjacent roof unit when rotating.

Furthermore, a notch is formed in the end part, close to the center of the opening, of the top cover unit, and the notch penetrates through the second side edge part.

The allowance is reserved when the end part of the top cover unit is close to the side edge part of the adjacent top cover unit by the opening, so that the top cover unit is further ensured not to collide with the adjacent top cover unit when rotating.

Furthermore, the gap is formed from one end, close to the center of the opening, of the second side edge portion to one end, far away from the center of the opening, and the length of the gap is between 90 centimeters and 110 centimeters.

The length range of the gap ensures that the length of the gap can be set within the range to better ensure that the top cover unit cannot collide when rotating.

Further, a wheel track system is arranged between the top wall and the top cover unit.

The wheel rail system is arranged to facilitate the rotation of the top cover units, and the effect of guiding the rotation of the top cover units is achieved.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present application;

FIG. 2 is a schematic structural view illustrating the cap unit rotated to open the opening in the embodiment of the present application;

FIG. 3 is a schematic structural view illustrating the top cover unit rotated to close the opening in the embodiment of the present application;

FIG. 4 is a schematic illustration of a first length, a second length, and a third length in an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a wheel track system and a rotating shaft in an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a main body portion in an embodiment of the present application;

FIG. 7 is a schematic view of the first side edge portion, the second side edge portion and the notch in an embodiment of the present application;

FIG. 8 is a schematic diagram of four unfavorable moments in an embodiment of the present application;

FIG. 9 is a schematic structural view illustrating one end of the top cover unit tilting in the embodiment of the present application;

fig. 10 is a schematic diagram of a first projection and a second projection in the embodiment of the present application.

Description of the drawings: 1. a roof main body; 101. a roof unit; 2. a top cover; 201. a top cover unit; 2011. a main body portion; 20111. a steel structure bracket; 20112. a suspended ceiling; 20113. a top cover surface; 2012. a first side edge portion; 20121. a first stage; 20122. a second stage; 2013. a second side edge portion; 3. an opening; 4. a first length; 5. a second length; 6. a third length; 7. a rotating shaft; 8. a wheel-rail system; 801. a guide wheel; 802. a track; 9. a first connection line; 10. a first projection; 11. a second projection; 12. and (4) a notch.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 and 2, there is shown a roof system comprising a roof body 1 and a roof 2, the roof body 1 having a top wall which is an annular wall enclosing an opening 3.

Referring to fig. 2 and 3, the top cover 2 includes a plurality of top cover units 201, the top cover 2 is disposed on the top wall, the plurality of top cover units 201 are arranged along the central circumference of the opening 3, and the plurality of top cover units 201 can rotate in the plane of the top wall relative to the top wall, so that the plurality of top cover units 201 can be spliced or separated to close or open the opening 3. The opening 3 is closed or opened to achieve the effect of free adjustment, the roof system is mainly used for buildings such as stadiums and exhibition centers, and the buildings have certain requirements on ventilation, light and waterproof effects. When the top cover 2 is closed, the opening 3 is shielded, and the effects of wind prevention and rain shielding can be achieved when thunderstorm and strong wind weather are met; when the top cover 2 is opened, the inside of the opening 3 is communicated with the outside of the opening 3, and outside air and light can better enter the interior of the building through the opening 3. Meanwhile, under some conditions, lighting and air circulation in a building need to be adjusted, the opening degree of the opening 3 can be adjusted according to actual conditions, and the self-adaptive adjustment of the whole lighting and air is facilitated.

With reference to fig. 4, the roof 2 partially coincides with the top wall, wherein coinciding means that a projection of the roof 2 in a vertical direction towards the top wall coincides with the top wall. The difference between the radius of the outer edge and the radius of the inner edge in the annular wall is a first length 4; the width of the overlapped part of the top cover unit 201 and the top wall in the radial direction of the annular wall is a second length 5; the radius of the inner edge of the annular wall is a third length 6; the ratio of the first length 4 to the second length 5 is between 1.19 and 1.3, the ratio of the first length 4 to the second length 5 is between 5 and the ratio of the second length 5 to the third length 6 is between 0.76 and 0.84. The ratio relation among the first length 4, the second length 5 and the third length 6 is obtained through calculation, so that the normal operation of the plurality of top cover units 201 can be ensured without collision, meanwhile, the standard of structure checking calculation can be achieved, and the structural deformation in the motion process is controlled within a reasonable range.

In some embodiments, the number of the top cover units 201 may be any one of six to ten, and in the embodiments of the present application, referring to fig. 1, the number of the top cover units 201 is eight.

In some embodiments, the top wall of the roof main body 1 may be an integral annular wall, and the roof main body 1 may also include a plurality of roof units 101, and the plurality of roof units 101 are connected to form the roof main body 1, wherein the plurality of roof units 101 are circumferentially arranged around the center of the circle of the opening 3 and are connected to each other to form an annular structure. As shown in the drawings, in the embodiment shown in the present application, the roof main body 1 is composed of 24 roof units 101, wherein every 3 roof units 101 are connected to form 1 roof unit 101 group (the hatched portion in fig. 1 is 1 roof unit 101 group), and 8 roof units 101 are connected to form the roof main body 1. Each roof but above the stack is provided with 1 roof unit 201.

In some embodiments, referring to fig. 5, the roof structure further includes a rotating shaft 7 and a wheel track system 8, the rotating shaft 7 is disposed between the roof main body 1 and the roof unit 201, the rotating shaft 7 is disposed on the top wall of the roof main body 1, an end portion of the rotating shaft 7 far away from the roof main body 1 is fixedly connected to the roof unit 201, and when the rotating shaft 7 rotates, the roof unit 201 connected thereto can be driven to rotate simultaneously. The rotating shaft 7 and the wheel track system 8 are multiple, the number of the rotating shaft is matched with that of the top cover units 201, the top cover units 201 are enabled to rotate towards the same direction, and therefore opening and closing of the opening 3 are achieved.

In some embodiments, referring to fig. 5, the wheel and rail system 8 includes a guide wheel 801 and a rail 802, the guide wheel 801 and the rail 802 supporting and guiding the rotation of the head unit 201. Under the action of the wheel-track system 8, the overall stability of the top cover unit 201 during the rotation process is better, and the top cover unit 201 can better move along the given track 802.

In some embodiments, the top cover unit 201 includes a body portion 2011, a first side edge portion 2012 and a second side edge portion 2013; the first side edge 2012 and the second side edge 2013 are located on both sides of the main body 2011 in the circumferential direction of the opening 3; the first side edge 2012 comprises a first section 20121 and a second section 20122 which are connected, the first section 20121 and the second section 20122 are both arc-shaped sections, and the first section 20121 and the second section 20122 are arc-shaped sections with arc-shaped openings 3 facing opposite directions; the second side edge 2013 conforms to the first side edge 2012 and the second side edge mates with the first side edge 2012 on an adjacent header unit 201 when the plurality of header units 201 are closed.

In some embodiments, referring to fig. 6, the main body part 2011 may include steel structure support 20111, a ceiling 20112 and a top cover 2, the ceiling 20112 is below the top cover 2, the ceiling 20112 and the top cover 2 are connected through the steel structure support 20111, the steel structure support 20111 supports the top cover 2 through a plurality of triangles arranged inside the steel structure support, and stability of connection of the top cover 2 is ensured.

In some embodiments, referring to fig. 7, first section 20121 of first side edge 2012 may be a convex arc section protruding from body 2011 relative to body 2011, in which case second section 20122 of first side edge 2012 is a concave arc section recessed relative to body 2011, and second side edge 2013 is similar to first side edge 2012; in other embodiments, the first section 20121 of the first side portion 2012 may be a concave arc section that is concave relative to the body 2011, in which case the second section 20122 of the second side portion 2013 is a convex arc section that is convex relative to the body 2011. The arrangement of the two arc-shaped sections leaves a certain margin in the rotation process of the top cover unit 201, so that the top cover unit can rotate within a certain rotation range without collision.

In some embodiments, the first segment 20121 is a segment near the center of the ring structure in a side of the body 2011, and the radius of curvature of the first segment 20121 is 27.9 to 28.1 meters.

In some embodiments, the first segment 20121 is a circular arc, wherein the circular arc of the first segment 20121 corresponds to a circle center angle between 28 ° and 28.5 °.

In some embodiments, the second section 20122 is a section away from the center of the ring structure in a side of the body 2011, and the radius of curvature of the second section 20122 is 19.6 to 19.8 meters.

In some embodiments, the second segment 20122 is a circular arc, wherein the circular arc of the second segment 20122 corresponds to a central angle between 20 ° and 20.5 °.

In some embodiments, referring to fig. 6 and 7, a side of the body 2011 located at the front end of the body 2011 in the rotation direction is a first side edge 2012, and a side of the body 2011 far from the first side edge 2012 is a second side edge 2013; the rotating shaft 7 is disposed on the top wall, the rotating shaft 7 is connected to the top cover unit 201, so that the top cover unit 201 rotates around the rotating shaft 7, and the rotating shaft 7 is located at an end of the second side edge portion 2013 away from the center of the opening 3. The rotation of the top cover unit 201 is facilitated by the arrangement of the rotating shaft 7, and the top cover unit 201 can rotate by taking the rotating shaft 7 as an axis in the rotating process.

In some embodiments, the rotating shaft 7 may be disposed on the roof main body 1, in which case a rotating hole matched with the rotating shaft 7 is disposed under the top cover unit 201, so as to realize the rotating connection between the top cover unit 201 and the rotating shaft 7; in other embodiments, the rotating shaft 7 may also be disposed below the top cover unit 201, in which case a rotating hole matched with the rotating shaft 7 is disposed on the top wall of the roof main body 1, so as to realize the rotating connection between the top cover unit 201 and the rotating shaft 7.

In some embodiments, referring to fig. 8, during the rotation of the top cover units 201, the distance relationship between two adjacent top cover units 201 changes with the rotation angle. The plurality of top cover units 201 have four unfavorable moments in the rotation process, and the four unfavorable moments are four angles with the shortest relative distance between two adjacent top cover units 201 under four rotation conditions.

Referring to fig. 8, of the four disadvantageous timings, in the process of rotating the rotating shaft 7 from 0 ° to 12 °, the relative distance between two adjacent top cover units 201 gradually approaches, and when the relative distance reaches 12 °, the first disadvantageous timing is reached; in the process that the rotating shaft 7 rotates from 12 degrees to 20 degrees, the distance between the adjacent top cover units 201 is not obviously changed, and the relative distance between the two top cover units 201 at 20 degrees is basically consistent with the relative distance of 12 degrees, namely 20 degrees is the second unfavorable moment; in the process that the rotating shaft 7 rotates from 20 degrees to 25 degrees, the distance between the adjacent top cover units 201 is gradually increased, and when the distance reaches 25 degrees, the distance between the adjacent top cover units 201 reaches the maximum of the section; in the process that the rotating shaft 7 rotates from 25 ° to 30 °, the distance between the adjacent top cover units 201 gradually decreases, and when the distance reaches 30 °, the distance between the adjacent top cover units 201 reaches the minimum of the section, namely, the distance is the third unfavorable time when the distance reaches 30 °; in the process of rotating from 30 degrees to 40 degrees, the relative distance between the adjacent top cover units 201 becomes larger gradually; during the rotation from 40 ° to 45 °, the relative distance between the adjacent cover units 201 gradually decreases again, i.e., at 45 °, it is the fourth disadvantageous time.

Among the four disadvantageous timings, the interval between two neighboring top cover units 201 at the first disadvantageous timing is a, the interval between two neighboring top cover units 201 at the second disadvantageous timing is b, the interval between two neighboring top cover units 201 at the third disadvantageous timing is c, and the interval between two neighboring top cover units 201 at the fourth disadvantageous timing is d. Wherein, the following is satisfied through simulation: b +10mm ═ b, b +60mm ≈ c, b ≈ d, and a < b ≈ d < c. Therefore, it is ensured that the two adjacent top cover units 201 do not collide at the 12 ° position, i.e., it is ensured that the top cover units 201 do not collide during the entire movement.

In some embodiments, referring to fig. 9, in order to reduce the collision probability of the two cover units 201 when rotating to 12 °, the cover units 201 are disposed obliquely, one end of the cover unit 201 close to the center of the opening 3 is higher than one end of the cover unit 201 far from the annular wall, and the height between the one end of the cover unit 201 close to the center of the opening 3 and the one end far from the annular wall is smoothly transited. When one end of the top cover unit 201 close to the center of the opening 3 is close to the adjacent top cover unit 201 in the rotating process of the top cover unit 201, because one end of the top cover unit 201 close to the center of the opening 3 is higher than any position of the end parts of the adjacent top cover unit 201 except the end parts close to the opening 3, a height difference exists between the end parts of the top cover unit 201 close to the center of the opening 3 and the adjacent top cover unit 201, so that dislocation can be generated in the rotating process of the top cover unit 201, and the probability of collision between the adjacent top cover units 201 is further reduced. Meanwhile, one end of the top cover unit 201 is higher than the other end, and can be used for resisting the deformation of the overhanging far end of the end part of the top cover unit 201 caused by self weight; on the other hand, the wheel track section can be avoided, and the horizontal relation of the wheel track section is kept.

In some embodiments, referring to fig. 10, a connecting line between the rotating shaft 7 and the end of the top cover unit 201 close to the opening 3 is a first connecting line 9, projections of an arc line of the first segment 20121 and an arc line of the second segment 20122 on the first connecting line 9 are a first projection 10 and a second projection 11, respectively, and a ratio of the first projection 10 to the second projection 11 is between 1.25 and 1.41. The first projection 10 and the second projection 11 are the proportion of the first section 20121 and the second section 20122 occupying the whole respectively, and the first section 20121 and the second section 20122 meeting the proportion range can better reduce the probability of collision of the top cover unit 201 in the rotating process.

In some embodiments, referring to fig. 7, the top cover unit 201 has a notch 12 formed at an end portion near the center of the opening 3, the notch 12 is located on the second side edge portion 2013, and the notch 12 is formed from an end of the second side edge portion 2013 near the center of the opening 3 to an end of the second side edge portion 2013 far from the center of the opening 3 along the extending direction of the first side edge portion 2012. The gap 12 formed in the top cover unit 201 further reduces the probability of collision between the adjacent top cover units 201.

In some embodiments, the notch 12 extends from the end of the second side edge 2013 near the center of the opening 3 to the end away from the center of the opening 3 by a length of between 90 cm and 110 cm.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A roof system, comprising:

a roof body having a top wall, said top wall being an annular wall, said annular wall enclosing an opening;

the top cover comprises a plurality of top cover units, the top cover is arranged on the top wall, the top cover units are arranged along the center circumference of the opening, and the top cover units can rotate in a plane where the top wall is located relative to the top wall, so that the top cover units are spliced or separated to enable the opening to be closed or opened; the difference between the radius of the outer edge and the radius of the inner edge in the top wall is a first length; the top cover unit is partially overlapped with the top wall, and the width of the overlapped part of the top wall and the top cover unit in the radial direction of the top wall is a second length; the radius of the inner edge of the top wall is a third length; the first length is between 1.19 and 1.3 greater than the second length, and the second length is between 0.76 and 0.84 greater than the third length.

2. The roof system of claim 1, wherein the number of roof units is six to ten.

3. The roof system of claim 2, wherein said roof units are eight.

4. A roof system according to any one of claims 1 to 3, wherein said capping unit includes a main body portion, a first side edge portion and a second side edge portion; the first side edge portion and the second side edge portion are respectively located on two sides of the main body portion in the circumferential direction of the opening; the first side edge part comprises a first section and a second section which are connected, the first section and the second section are both arc sections, and the arc openings of the first section and the second section are opposite in direction; the second side edge portion is adapted to the first side edge portion, and the second side edge portion is matched with the first side edge portion of the adjacent top cover unit when the plurality of top cover units are closed.

5. The roof system of claim 4, wherein said first section is a section near a center of the ring structure in one side of said main body portion, said first section having a radius of curvature of 27.9 meters to 28.1 meters.

6. The roof system of claim 4, where said second section is a section away from a center of said ring structure in a side of said main body portion, said second section having a radius of curvature of 19.6 meters to 19.8 meters.

7. The roof system of claim 4, wherein said first side edge portion is located at a front end of said main body portion and said second side edge portion is located at a rear end of said main body portion in a rotational direction of said roof unit with respect to said top wall; the roof system further comprises a rotating shaft, the rotating shaft is arranged between the top cover unit and the top wall, and the top cover unit is located at the end portion, far away from the center of the opening, of the second side edge portion compared with the rotating axis of the top wall.

8. The roof system of claim 7, wherein said roof unit is disposed obliquely downward from an end near the center of said opening to an end away from the center of said opening.

9. The roof system of claim 7, wherein a connection line between said rotation axis and an end of said roof unit near said opening is a first connection line, an orthogonal projection of said first segment on said first connection line is a first projection, an orthogonal projection of said second segment on said first connection line is a second projection, and a length of said first projection is between 1.25 and 1.41 greater than a length of said second projection.

10. The roof system of claim 7, wherein said roof unit has a notch formed in an end thereof near a center of said opening, said notch extending through said second side edge portion.

11. The roof system of claim 9, wherein said notch is formed from an end of said second side edge portion proximate to a center of said opening to an end thereof distal from said center of said opening, said notch being formed to a length of between 90 cm and 110 cm.

12. A roof system according to claim 1, characterised in that a wheel and rail system is provided between the top wall and the roof units.