A comprehensive structure for drainage and exhaust of large-area roofs

Abstract

The present invention relates to the technical field of roof drainage and exhaust, and in particular to a large-area roof drainage and exhaust integrated structure; comprising a drain pipe and an exhaust pipe; a tapered hole for placing the drain pipe is reserved when the roof is cast, an exhaust pipe is provided on the drain pipe, and through holes for drainage and exhaust are uniformly opened along the circumference of the exhaust pipe; the lower end of the exhaust pipe of the present invention is connected to the drain pipe, which can effectively discharge moisture and avoid frost heave damage to the roof caused by retained water vapor; the pebble placement frame and the cooperation of the first reinforcement part and the slope layer, and the cooperation of the second reinforcement part and the leveling layer are used to improve the stability of the drain pipe and extend the overall service life; the pebble placement frame is provided with a pebble filter layer and a non-woven fabric filter layer to avoid clogging of the exhaust pipe and affecting the exhaust effect; in addition, the present invention adopts an upright and inverted roof combination structure to improve the waterproof effect of the roof.

Description

Technical Field

[0001] The present invention relates to the technical field of roof drainage and exhaust, and in particular to a large-area roof drainage and exhaust integrated structure. Background Art

[0002] The roof is composed of reinforced concrete structural layers, namely roof panels, waterproof layers, thermal insulation layers, slope layers and leveling layers. Exhaust pipes are installed in the thermal insulation layers, slope layers and leveling layers to discharge the gas inside the roof in time to prevent the roof from cracking and damage due to water freezing and gas pressure, so as to extend the service life of the roof. The roof is divided into upright roof and inverted roof. The difference is that the waterproof layer of the upright roof is located above the thermal insulation layer, and the waterproof layer of the inverted roof is located below the thermal insulation layer.

[0003] However, the above-mentioned drainage and exhaust methods have the following problems: the existing roof drainage and exhaust structure is mainly used for exhaust, which cannot actively discharge moisture and is prone to retaining water vapor, causing frost heave damage to the roof. In addition, no effective anti-clogging measures and reinforcement structures are taken between the exhaust pipe and the insulation layer and other structures. Debris enters the exhaust pipe unimpeded, which can easily cause the exhaust pipe to be blocked, affecting the exhaust effect and service life. Secondly, the existing roof structure uses only upright roof or inverted roof, and the waterproof layer is easily affected by ultraviolet aging and mechanical damage, affecting the overall service life. Summary of the Invention

[0004] In view of the above problems, an embodiment of the present application provides a large-area roof drainage and exhaust integrated structure to solve the above-mentioned technical problems.

[0005] In order to achieve the above-mentioned purpose, the embodiments of the present application provide the following technical solutions: the embodiments of the present application provide a large-area roof drainage and exhaust integrated structure, including a drain pipe and an exhaust pipe; when the roof is cast, a tapered hole for placing the drain pipe is reserved, and an exhaust pipe is provided on the drain pipe, and the lower end of the exhaust pipe is evenly provided with through holes for drainage and exhaust along its circumference.

[0006] A ventilation cap is detachably mounted on the upper end of the exhaust pipe, a pebble rack is provided on the exhaust pipe, a positioning ring is welded on the exhaust pipe and is located above the through hole and is used to block the pebble rack, and a first reinforcement part and a second reinforcement part are sequentially arranged on the pebble rack from bottom to top for improving the stability of the pebble rack.

[0007] The upper end of the roof and the inner wall of the tapered hole are jointly paved with a bottom waterproof layer. After the bottom waterproof layer is laid, the drainage pipe is inserted into the tapered hole, and then the pebble placement rack is installed on the exhaust pipe and a pebble filter layer is piled up in the pebble placement rack. A non-woven fabric filter layer is laid on the outside of the pebble placement rack.

[0008] After the non-woven fabric filter layer is laid, the insulation layer is laid on the upper end of the bottom waterproof layer. After the insulation layer is laid, the first reinforcement part is first installed on the pebble placement rack, and then the slope layer is poured on the upper end of the insulation layer, and the first reinforcement part is located in the slope layer. After the slope layer is formed, the second reinforcement part is installed on the pebble placement rack, and then the leveling layer is poured on the upper end of the slope layer, and the second reinforcement part is located in the leveling layer. The leveling layer, the pebble placement rack and the outer wall of the exhaust pipe are jointly provided with a top waterproof layer.

[0009] As a preferred solution, the pebble placing rack includes a placing ring, which is slidably sleeved on the exhaust pipe and fits with the positioning ring. The outer ring wall of the placing ring is evenly provided with multiple support tubes along its circumference. The support tube includes an inclined section in the middle that is inclined from top to bottom toward the side away from the axis of the placing ring and a horizontal section connected at the upper and lower ends. The upper horizontal section of the support tube is welded and fixed to the placing ring, and a grid is welded between the inclined sections of two adjacent support tubes.

[0010] As a preferred solution, the first reinforcement part includes a connecting ring, the inner ring wall of the connecting ring is fixedly installed with a positioning block corresponding to the support tube one by one, the positioning block is a right-angled trapezoidal structure with an inclined surface that fits the inclined section of the support tube, the outer ring wall of the connecting ring is evenly fixedly installed with a reinforcement plate along its circumference, the positioning block is provided with a limiting component for limiting the rotation of the connecting ring, and the support tube is provided with a pre-fixing component for pre-fixing and limiting the upward movement of the connecting ring. The first reinforcement part and the second reinforcement part have the same structure, the difference being that the diameter of the connecting ring in the first reinforcement part is larger than the diameter of the connecting ring in the second reinforcement part.

[0011] As a preferred solution, the vent cap is a hemispherical shell, and an external threaded pipe is fixedly installed in the inner cavity of the vent cap through a support, and the external threaded pipe is threadedly connected to the upper end of the exhaust pipe.

[0012] As a preferred solution, the limiting assembly includes limiting grooves, the supporting tube is provided with limiting grooves corresponding to the positioning blocks, and the inclined surface of the positioning block is fixedly mounted with limiting blocks that slide through the corresponding limiting grooves.

[0013] As a preferred solution, the pre-fixing component includes a spring slot, the end of the limiting block away from the exhaust pipe is provided with a spring slot, and the limiting slot is provided with an extrusion spring that cooperates with the spring slot.

[0014] As a preferred solution, the thermal insulation layer is an extruded polystyrene board; the slope layer is formed by pouring and solidifying foam concrete; and the leveling layer is formed by pouring and solidifying cement mortar.

[0015] As a preferred solution, the bottom waterproof layer is a radiation-resistant and weather-resistant waterproof roll; the top waterproof layer is a polymer self-adhesive composite waterproof roll.

[0016] As a preferred solution, the reinforcement plate is evenly provided with pouring grooves running through it from top to bottom for fixing the reinforcement plate by pouring foam concrete or cement mortar.

[0017] As a preferred solution, the drain pipe is a truncated cone tubular structure, and the lower end of the exhaust pipe is welded to the inner wall of the large-diameter end of the drain pipe.

[0018] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: 1. The lower end of the exhaust pipe of the present invention is connected to the drain pipe, which can effectively drain moisture and avoid frost heave damage to the roof caused by retained water vapor. The pebble placement rack and the cooperation between the first reinforcement part and the slope layer, and the second reinforcement part and the leveling layer can improve the stability of the drain pipe and extend its overall service life. The pebble placement rack is provided with a pebble filter layer and a non-woven fabric filter layer to avoid exhaust pipe blockage affecting the exhaust effect. In addition, the present invention adopts an upright and inverted roof combination structure to improve the waterproof effect of the roof.

[0019] 2. The pebble placement rack provided in the present invention supports and positions the exhaust pipe through the support tube to ensure the stability of the exhaust pipe, and blocks and limits the pebbles through the grid to form a pebble filter layer, and then lays non-woven fabric on the outside of the pebble placement rack to form a non-woven fabric filter layer to filter the gas and moisture discharged from the insulation layer and other structures to prevent the exhaust pipe from being blocked.

[0020] 3. The present invention sets waterproofing on both sides through the combination of upright and inverted surfaces, namely the bottom waterproof layer and the top waterproof layer, thereby forming a barrier through the bottom and top double-layer waterproofing: the top waterproof layer resists external erosion, and the bottom waterproof layer isolates internal water vapor. At the same time, structures such as the insulation layer are sandwiched in the middle to avoid exposure and damage. The two work together to significantly reduce the risk of leakage and insulation failure.

[0021] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0023] Figure 1 It is a schematic structural diagram of the drainage pipe, exhaust pipe, ventilation cap, pebble placement rack, first reinforcement part and second reinforcement part after being combined in the present invention.

[0024] Figure 2 for Figure 1 Schematic diagram of the structure after the hidden grid.

[0025] Figure 3 It is a schematic diagram of the structure after the construction of the present invention is completed.

[0026] Figure 4 for Figure 3 A magnified view of the structure in Figure 2.

[0027] Figure 5 for Figure 1 Exploded diagram of part of the structure.

[0028] Figure 6 It is a structural schematic diagram of the pebble placement rack of the present invention.

[0029] Figure 7 for Figure 1 Partial structural cross-sectional view.

[0030] Figure numerals: 10, drain pipe; 11, exhaust pipe; 110, positioning ring; 111, through hole; 12, ventilation cap; 120, external threaded pipe; 13, pebble placement rack; 130, placement ring; 131, support pipe; 132, grid; 2, first reinforcement part; 20, connecting ring; 21, positioning block; 22, reinforcement plate; 220, pouring groove; 23, limiting assembly; 230, limiting groove; 231, limiting block; 24, pre-fixing assembly; 240, shrapnel groove; 241, extruded shrapnel; 3, second reinforcement part; 14, pebble filter layer; 15, non-woven fabric filter layer; 4, bottom waterproof layer; 5, thermal insulation layer; 6, slope layer; 7, leveling layer; 8, top waterproof layer. DETAILED DESCRIPTION

[0031] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] like Figure 1 、 Figure 2 and Figure 3 As shown, a large-area roof drainage and exhaust integrated structure includes a drain pipe 10 and an exhaust pipe 11; a tapered hole for placing the drain pipe 10 is reserved when the roof is cast, and an exhaust pipe 11 is provided on the drain pipe 10, and the lower end of the exhaust pipe 11 is uniformly provided with through holes 111 for drainage and exhaust along its circumference.

[0033] like Figure 1 、 Figure 2 and Figure 3 As shown, a ventilation cap 12 is detachably mounted on the upper end of the exhaust pipe 11, a pebble rack 13 is provided on the exhaust pipe 11, a positioning ring 110 is welded on the exhaust pipe 11 and is located above the through hole 111 and is used to block the pebble rack 13, and a first reinforcement part 2 and a second reinforcement part 3 are sequentially provided on the pebble rack 13 from bottom to top for improving the stability of the pebble rack 13.

[0034] like Figure 2 、 Figure 5 and Figure 7 As shown, the vent cap 12 is a hemispherical shell, and an external threaded tube 120 is fixedly installed in the inner cavity of the vent cap 12 through a support, and the external threaded tube 120 is threadedly connected to the upper end of the exhaust pipe 11.

[0035] like Figure 1 、 Figure 2 and Figure 3 As shown, the upper end of the roof and the inner wall of the tapered hole are jointly laid with a bottom waterproof layer 4. After the bottom waterproof layer 4 is laid, the drain pipe 10 is inserted into the tapered hole, and then the pebble rack 13 is installed on the exhaust pipe 11 and a pebble filter layer 14 is piled up in the pebble rack 13, and a non-woven filter layer 15 is laid on the outside of the pebble rack 13; after the non-woven filter layer 15 is laid, an insulation layer 5 is laid on the upper end of the bottom waterproof layer 4. After the insulation layer 5 is laid, the first reinforcement part 2 is first installed on the pebble rack 13, and then the slope layer 6 is poured on the upper end of the insulation layer 5, and the first reinforcement part 2 is located in the slope layer 6. After the slope layer 6 is formed, the second reinforcement part 3 is installed on the pebble rack 13, and then the leveling layer 7 is poured on the upper end of the slope layer 6, and the second reinforcement part 3 is located in the leveling layer 7. The leveling layer 7, the pebble rack 13 and the outer wall of the exhaust pipe 11 are jointly provided with a top waterproof layer 8.

[0036] like Figure 2 and Figure 3 As shown, the drain pipe 10 is a truncated cone-shaped tubular structure, and the lower end of the exhaust pipe 11 is welded to the inner wall of the large-diameter end of the drain pipe 10, forming a natural slope during drainage. The water flow speed gradually increases as the pipe diameter decreases, and the siphon effect is used to accelerate drainage while reducing the deposition of mud, sand and debris in the pipe.

[0037] During the specific work, first lay the bottom waterproof layer 4 on the upper end of the roof and the inner wall of the cone hole. After the bottom waterproof layer 4 is laid, insert the drain pipe 10 into the cone hole, then install the pebble placement frame 13 on the exhaust pipe 11 welded and fixed to the drain pipe 10, and then pile pebbles into the pebble placement frame 13 to form a pebble filter layer 14. After the stacking is completed, lay non-woven fabric on the outside of the pebble placement frame 13 to form a non-woven fabric filter layer 15. After the non-woven fabric filter layer 15 is laid, lay the insulation layer 5 on the upper end of the bottom waterproof layer 4. After the insulation layer 5 is laid, Finally, the first reinforcement part 2 is installed on the pebble placement frame 13, and then the slope layer 6 is set at the upper end. The slope layer 6 fixes the first reinforcement part 2, and then the second reinforcement part 3 is installed on the pebble placement frame 13, and a leveling layer 7 is set on the upper end of the slope layer 6. The leveling layer 7 fixes the second reinforcement part 3, thereby improving the stability of the pebble placement frame 13 by fixing the first reinforcement part 2 and the second reinforcement part 3, and then laying the top waterproof layer 8, thereby adopting an upright and inverted roof combination structure (that is, using two layers of waterproof layers), thereby improving the waterproof effect of the roof.

[0038] like Figure 1 、 Figure 2 、 Figure 5 and Figure 6 As shown, the pebble placement rack 13 includes a placement ring 130, which is slidably mounted on the exhaust pipe 11 and fits with the positioning ring 110. The outer ring wall of the placement ring 130 is evenly provided with multiple support tubes 131 along its circumference. The support tube 131 includes an inclined section in the middle portion which is inclined from top to bottom toward a side away from the axis of the placement ring 130 and a horizontal section connected at the upper and lower ends. The upper horizontal section of the support tube 131 is welded and fixed to the placement ring 130, and a grid 132 is welded between the inclined sections of two adjacent support tubes 131.

[0039] like Figure 3 As shown, the bottom waterproof layer 4 is a radiation-resistant and weather-resistant waterproof roll; the top waterproof layer 8 is a polymer self-adhesive composite waterproof roll.

[0040] During the specific work, the radiation-resistant and weather-resistant waterproof roll is first laid on the upper end of the roof and the inner wall of the tapered hole to form a bottom waterproof layer 4. After the laying is completed, the drain pipe 10 welded with the exhaust pipe 11 is inserted into the tapered hole, and then the placement ring 130 is manually put on the exhaust pipe 11, and then the placement ring 130 is moved down until it fits with the positioning ring 110, and then the pebbles are placed from the gap between the upper end of the grid 132 and the placement ring 130 into the pebble placement rack 13 to form a pebble filter layer 14, and then the non-woven fabric is laid on the outside of the pebble placement rack 13 to form a non-woven fabric filter layer 15.

[0041] like Figure 1 、 Figure 2 、 Figure 5 、 Figure 6 and Figure 7 As shown, the first reinforcement part 2 includes a connecting ring 20, and the inner ring wall of the connecting ring 20 is fixedly installed with a positioning block 21 corresponding to the support tube 131. The positioning block 21 is a right-angled trapezoidal structure with an inclined surface that fits the inclined section of the support tube 131. The outer ring wall of the connecting ring 20 is evenly fixed with a reinforcement plate 22 along its circumference. The positioning block 21 is provided with a limiting component 23 for limiting the rotation of the connecting ring 20, and the support tube 131 is provided with a pre-fixing component 24 for pre-fixing and limiting the upward movement of the connecting ring 20. The first reinforcement part 2 and the second reinforcement part 3 have the same structure, the difference being that the diameter of the connecting ring 20 in the first reinforcement part 2 is larger than the diameter of the connecting ring 20 in the second reinforcement part 3.

[0042] like Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the limiting assembly 23 includes a limiting groove 230 , and the supporting tube 131 is provided with a limiting groove 230 corresponding to the positioning block 21 . The limiting block 231 is fixedly installed on the inclined surface of the positioning block 21 and slides through the corresponding limiting groove 230 .

[0043] like Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the pre-fixing component 24 includes a spring slot 240 , and the end of the limiting block 231 away from the exhaust pipe 11 is provided with a spring slot 240 , and the limiting slot 230 is provided with an extrusion spring 241 that cooperates with the spring slot 240 .

[0044] like Figure 3 As shown, the thermal insulation layer 5 is an extruded polystyrene board; the slope layer 6 is formed by pouring and solidifying foam concrete; and the leveling layer 7 is formed by pouring and solidifying cement mortar.

[0045] like Figure 2 As shown, the reinforcing plate 22 is evenly provided with pouring grooves 220 running through it from top to bottom for fixing the reinforcing plate 22 by pouring foam concrete or cement mortar; the foam concrete and cement mortar are partially solidified in the pouring grooves 220 to further improve the stability of the reinforcing plate 22.

[0046] During the specific operation, after the non-woven filter layer 15 is laid, the extruded polystyrene board is laid on the upper end of the bottom waterproof layer 4 to form the thermal insulation layer 5, and then the first reinforcement part 2 is installed to make the inclined surface of the positioning block 21 on the connecting ring 20 fit with the inclined section of the corresponding support tube 131 to limit the further downward movement of the connecting ring 20, and the lower horizontal section of the support tube 131 fits with the bottom waterproof layer 4, and the positioning block 21 moves downward and fits with the support tube 131. The process will drive the limit block 231 to insert into the corresponding limit groove 230 to further limit the rotation of the connecting ring 20, and in the process of the limit block 231 inserting into the limit groove 230, it will conflict with the extrusion spring piece 241 to push the extrusion spring piece 241 to deform and ensure that the limit block 231 moves into place After the limit block 231 moves into place, the squeezed spring piece 241 will rebound and hit the inner wall of the spring piece groove 240, so as to pre-fix the connecting ring 20 to limit its upward movement. Then, foam concrete is poured on the upper end of the insulation layer 5 to form a slope layer 6. After the foam concrete solidifies, the first reinforcement part 2 is fixed. Then, the second reinforcement part 3 is installed on the pebble placement frame 13 in the same way, and cement mortar is poured on the upper end of the slope layer 6 to form a leveling layer 7. When the cement mortar solidifies, the second reinforcement part 3 is fixed. Therefore, by fixing the first reinforcement part 2 and the second reinforcement part 3, the stability of the pebble placement frame 13 is improved, thereby improving the stability of the exhaust pipe 11 and extending its service life. Finally, the ventilation cap 12 is manually threaded to the upper end of the exhaust pipe 11 through the external threaded pipe 120.

[0047] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0048] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature designated as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0049] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0050] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A large-area roof drainage and exhaust integrated structure, comprising a roof, a drainage pipe, and an exhaust pipe; characterized in that: When the roof is poured, a tapered hole is reserved for placing the drainage pipe. An exhaust pipe is provided on the drainage pipe. The lower end of the exhaust pipe is evenly provided with through holes for drainage and exhaust along its circumference; wherein: A ventilation cap is detachably mounted on the upper end of the exhaust pipe, a pebble rack is provided on the exhaust pipe, a positioning ring is welded on the exhaust pipe and is located above the through hole and is used to block the pebble rack, and a first reinforcement portion and a second reinforcement portion are sequentially provided on the pebble rack from bottom to top for improving the stability of the pebble rack; The top of the roof and the inner wall of the tapered hole are jointly paved with a bottom waterproof layer. After the bottom waterproof layer is laid, the drainage pipe is inserted into the tapered hole. Then the pebble placement rack is installed on the exhaust pipe and a pebble filter layer is piled up in the pebble placement rack. A non-woven filter layer is laid on the outside of the pebble placement rack. After the non-woven fabric filter layer is laid, the insulation layer is laid on the upper end of the bottom waterproof layer. After the insulation layer is laid, the first reinforcement part is first installed on the pebble placement frame, and then the slope layer is poured on the upper end of the insulation layer, and the first reinforcement part is located in the slope layer. After the slope layer is formed, the second reinforcement part is installed on the pebble placement frame, and then the leveling layer is poured on the upper end of the slope layer, and the second reinforcement part is located in the leveling layer. The leveling layer, the pebble placement frame and the outer wall of the exhaust pipe are jointly provided with a top waterproof layer; The pebble placing rack includes a placing ring, which is slidably sleeved on the exhaust pipe and fits into the positioning ring. The outer ring wall of the placing ring is evenly provided with multiple support tubes along its circumference. The support tube includes an inclined section in the middle portion which is inclined from top to bottom toward a side away from the axis of the placing ring and a horizontal section connected at the upper and lower ends. The upper horizontal section of the support tube is welded and fixed to the placing ring, and a grid is welded between the inclined sections of two adjacent support tubes.

2. A large-area roof drainage and exhaust integrated structure according to claim 1, characterized in that: The first reinforcement part includes a connecting ring, and the inner ring wall of the connecting ring is fixedly installed with a positioning block corresponding to the support tube one by one. The positioning block is a right-angled trapezoidal structure with an inclined surface that fits the inclined section of the support tube. The outer ring wall of the connecting ring is evenly fixed with a reinforcement plate along its circumference. The positioning block is provided with a limiting component for limiting the rotation of the connecting ring, and the support tube is provided with a pre-fixing component for pre-fixing and limiting the upward movement of the connecting ring. The first reinforcement part and the second reinforcement part have the same structure, the difference being that the diameter of the connecting ring in the first reinforcement part is larger than the diameter of the connecting ring in the second reinforcement part.

3. The large-area roof drainage and exhaust integrated structure according to claim 1, characterized in that: The vent cap is a hemispherical shell, and an external threaded pipe is fixedly installed in the inner cavity of the vent cap through a support, and the external threaded pipe is threadedly connected to the upper end of the exhaust pipe.

4. The large-area roof drainage and exhaust integrated structure according to claim 2, characterized in that: The limiting assembly includes a limiting groove. The supporting tube is provided with a limiting groove corresponding to the positioning block. The inclined surface of the positioning block is fixedly mounted with a limiting block that slides through the corresponding limiting groove.

5. A large-area roof drainage and exhaust integrated structure according to claim 4, characterized in that: The pre-fixing component includes a spring slot. The end of the limiting block away from the exhaust pipe is provided with a spring slot. The limiting slot is provided with an extrusion spring that cooperates with the spring slot.

6. The large-area roof drainage and exhaust integrated structure according to claim 1, characterized in that: The thermal insulation layer is an extruded polystyrene board; The slope leveling layer is formed by pouring and solidifying foam concrete; The leveling layer is formed by pouring and solidifying cement mortar.

7. The large-area roof drainage and exhaust integrated structure according to claim 1, characterized in that: The bottom waterproof layer is a radiation-resistant and weather-resistant waterproof roll; The top waterproof layer is a polymer self-adhesive composite waterproof roll.

8. The large-area roof drainage and exhaust integrated structure according to claim 2, characterized in that: The reinforcement plate is evenly provided with pouring grooves which penetrate up and down and are used for fixing the reinforcement plate by pouring foam concrete or cement mortar.

9. The large-area roof drainage and exhaust integrated structure according to claim 1, characterized in that: The drain pipe is a truncated cone tubular structure, and the lower end of the exhaust pipe is welded to the inner wall of the large-diameter end of the drain pipe.

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