A kind of drainage structure of assembled building external wall panel

Abstract

The present application discloses a drainage structure for an assembled building exterior wall panel, which relates to the field of assembled building structures. The structure includes a drainage pipe, an air duct, an exhaust assembly, and an inflation assembly, which are arranged between the exterior wall panel and the interior wall. The air duct, exhaust assembly, and inflation assembly can all be detachably fixedly installed between the exterior wall panel and the interior wall, and the air duct and drainage pipe are both connected to the internal cavity of the exterior wall panel. The drainage pipe is coaxially fixed to the inner side of the air duct. The exhaust assembly is used to extract gas from the air duct, and the inflation assembly is used to introduce gas into the air duct. A vent is also provided at the top of the air duct for balancing the air pressure inside and outside the air duct. The drainage structure of the present application can discharge accumulated water in the internal cavity of the exterior wall panel and the gap between the exterior wall panel and the interior wall, and extract the accumulated moisture therein, effectively improving the problem of moisture accumulation and condensation water deposition between the exterior wall panel and the interior wall and in the internal cavity of the exterior wall panel.

Description

Technical Field

[0001] The present application relates to the field of prefabricated building structures, and in particular to a drainage structure for prefabricated building exterior wall panels. Background Art

[0002] Prefabricated buildings involve disassembling building structures (such as wall panels, columns, beams, floor slabs, and staircases) into prefabricated pieces according to specific specifications in a factory, then transporting them to the site for assembly. Prefabricated building exterior wall panels, as part of the exterior envelope, are typically joined horizontally and vertically with glue. To conserve materials and provide sound and heat insulation, these panels often contain internal cavities.

[0003] When assembling exterior wall panels, numerous joints are typically left. Rainwater can easily seep through these joints between the exterior wall panels and the interior wall, ultimately draining out through the gaps / drain holes / drain channels between the exterior wall panels and the interior wall. In reality, there are temperature differences between the gaps / cavities between the exterior wall panels and the interior wall and the environment outside the exterior wall panels, as well as between the cavity inside the exterior wall panels and the environment outside the exterior wall panels. Due to the thermal bridge effect, moisture and condensation can easily accumulate in these gaps, spaces, and cavities, potentially causing mold and cracking on the exterior wall panels and the interior wall, impacting the safety of the exterior wall panels and the entire building. Summary of the Invention

[0004] In order to improve the problem of moisture accumulation and condensation water deposition between the external wall panels and the internal walls and in the internal cavity of the external wall panels, the present application provides a drainage structure for the external wall panels of an assembled building.

[0005] The present application provides an assembled building exterior wall panel drainage structure that adopts the following technical solutions:

[0006] A drainage structure for an assembled building exterior wall panel, comprising a drainage pipe, an air guide pipe, an air extraction component, and an air charging component arranged between the exterior wall panel and the interior wall;

[0007] The air duct, the air extraction assembly and the air filling assembly can be detachably fixedly installed between the external wall panel and the internal wall, and the air duct is provided with a first connecting pipe group for connecting the air duct with the internal cavity of the external wall panel;

[0008] The drainage pipe is coaxially fixed to the inner side of the air guide pipe, and the drainage pipe is provided with a second connecting pipe group for connecting the drainage pipe with the inner cavity of the external wall panel;

[0009] The surface of the external wall panel close to the inner wall is also provided with a first air guide hole and a drainage hole connected to the internal cavity of the external wall panel;

[0010] The exhaust component is used to extract gas from the airway tube, and the inflation component is used to introduce gas into the airway tube. A vent hole is also opened on the top of the airway tube for balancing the air pressure inside and outside the airway tube.

[0011] By adopting the above technical solution, during the use of the external wall panel, the air duct in the present application is connected to the internal cavity of the external wall panel through the first connecting pipe group, and the drain pipe is connected to the internal cavity of the external wall panel through the second connecting pipe group, and the drain pipe is coaxially fixed to the inside of the air duct. The accumulated water in the internal cavity of the external wall panel and the accumulated water between the external wall panel and the inner wall can be discharged through the drain pipe; and a channel for gas circulation is formed between the drain pipe and the air duct, and the exhaust component can correspondingly extract the moisture accumulated in the internal cavity of the external wall panel through the channel between the drain pipe and the air duct and the first connecting pipe group. At the same time, the first air guide hole connects the cavity of the external wall panel and the gap between the external wall panel and the inner wall, so that the internal cavity of the external wall panel, the gap between the external wall panel and the inner wall, and the channel between the drain pipe and the air guide pipe are all in a connected state, so that the exhaust component can directly extract the moisture accumulated in the internal cavity of the external wall panel, the gap between the external wall panel and the inner wall, and the channel between the drain pipe and the air guide pipe, thereby reducing the moisture accumulation between the external wall panel and the inner wall and in the internal cavity of the external wall panel; and enables the inflation component to pass dry gas / warm gas into the gap between the external wall panel and the inner wall and the internal cavity of the external wall panel to dry the gap between the external wall panel and the inner wall, thereby making it difficult for moisture accumulation and condensation water deposition to occur between the external wall panel and the inner wall and in the internal cavity of the external wall panel, thereby improving the surface mold, wall cracking and other problems caused by moisture accumulation, condensation water / water accumulation on the surface of the external wall panel and the inner wall, thereby enhancing the safety of the external wall panel and even the entire building.

[0012] Optionally, the first connecting pipe group includes an air guide branch pipe and a connecting pipe, the air guide branch pipe is fixedly installed in the external wall panel, and a plurality of second air guide holes are formed through the air guide branch pipe to connect the external wall panel cavity and the air guide branch pipe. The air guide branch pipe is integrally provided with a first branch pipe joint protruding from one side along the transverse extension direction of the inner wall, and the first branch pipe joint is exposed on a surface of the external wall panel on a side close to the inner wall;

[0013] A main joint is integrally protruded on one side of the air guide pipe along the transverse extension direction of the inner wall. One end of the connecting pipe is coaxially sleeved and slidingly sealed to the main joint, and the other end is threadedly assembled with the first branch pipe joint and sealed.

[0014] By adopting the above technical solution, the main joint and the first branch pipe joint are aligned, and a connecting pipe is used to be sleeved on the relative connection between the main joint and the first branch pipe joint, so that the connecting pipe connects and seals the main joint and the first branch pipe joint, thereby facilitating the air extraction component to extract moisture from the cavity of the external wall panel through the air guide branch pipe, and facilitating the air filling component to introduce dry gas / warm gas into the cavity of the external wall panel through the air guide branch pipe, thereby maintaining the gap between the external wall panel and the inner wall and the cavity of the external wall panel dry.

[0015] Optionally, a second branch pipe joint is provided on the side of the air guide branch pipe protruding away from the first branch pipe joint, and the second branch pipe joint is also exposed on the surface of the side of the external wall panel close to the inner wall, and the first branch pipe joint and the second branch pipe joint between the two adjacent external wall panels on the left and right are suitable for detachable fixation and sealed connection.

[0016] By adopting the above technical solution, it is easy to achieve air path connection between the internal cavities of two adjacent external wall panels on the left and right, expand the maximum area that can be effectively radiated by the air path of each set of exhaust components and inflation components, and achieve more efficient and energy-saving removal of moisture between the external wall panels and the inner walls and in the internal cavities of the external wall panels.

[0017] Optionally, the air guide branch pipe is respectively provided with a third branch pipe joint and a fourth branch pipe joint protruding on both sides along the longitudinal extension direction of the inner wall. The third branch pipe joint and the fourth branch pipe joint are both exposed on the surface of the external wall panel close to the inner wall, and the third branch pipe joint and the fourth branch pipe joint between the two adjacent external wall panels are suitable for detachable fixation and sealed connection.

[0018] By adopting the above technical solution, it is easy to achieve air path connection between the internal cavities of two upper and lower adjacent external wall panels, thereby cooperating with the first branch pipe joint and the second branch pipe joint to achieve air path connection between the internal cavities of the entire wall surface / larger area of ​​the external wall panels, thereby further expanding the maximum area that the air path of each set of exhaust components and inflation components can effectively radiate, and more efficiently and energy-savingly achieve moisture removal between the external wall panels and the inner walls on the entire wall surface and in the internal cavities of the external wall panels.

[0019] Optionally, a condensation component is provided between the air duct and the drain pipe, the exhaust assembly is connected to the lower end of the air duct, the condensation component is located between the main joint and the exhaust assembly, and the condensation component is used to increase the contact area between the air and the air duct.

[0020] By adopting the above technical solution, the condensation speed of moisture in the air duct is accelerated, so that the moisture in the air duct can be condensed into condensed water as quickly as possible and discharged from the air duct.

[0021] Optionally, the condensation component is a condensation hood, which is fixedly installed between the air duct and the drain pipe, and the condensation hood extends obliquely from the air duct toward the drain pipe, and a water passage for condensed water to pass through is formed between the condensation hood and the outer wall of the drain pipe.

[0022] By adopting the above technical solution, the moisture in the air duct can condense at the condensation hood and form condensed water, or pass through the condensation hood through the water passage and be extracted by the exhaust component; and the condensed water formed by condensation can drip down along the drain pipe through the water passage, gather and finally be discharged.

[0023] Optionally, a wiper component is provided between the air duct and the drain pipe for scraping condensed water on the inner wall of the air duct and the outer wall of the drain pipe, and the wiper component is located between the condensation component and the main joint.

[0024] By adopting the above technical solution, it is convenient to accelerate the speed of condensed water dripping downward and gathering on the inner wall of the air guide pipe and the outer peripheral wall of the drainage pipe, thereby accelerating the discharge of the condensed water.

[0025] Optionally, the wiper component includes a lightweight scraper ring, which is coaxially sleeved and slidably connected to the drain pipe, and the inner side wall of the lightweight scraper ring is gap-matched with the outer peripheral wall of the drain pipe, and the outer side wall of the lightweight scraper ring is gap-matched with the inner peripheral wall of the air guide pipe;

[0026] The connecting portion between the air guide pipe and the inflation component and the connecting portion between the air guide pipe and the air extraction component are respectively located on both sides of the lightweight scraper ring.

[0027] By adopting the above technical solution, the vacuum component and the inflation component are used to perform vacuum and inflation on both sides of the lightweight scraper ring respectively, which can drive the lightweight scraper ring to slide on the drain pipe and enable the lightweight scraper ring to effectively scrape the condensed water condensed on the inner wall of the air duct and the outer wall of the drain pipe.

[0028] Optionally, an annular water receiving trough is further provided on the drain pipe below the condensation cover for receiving condensed water sliding down the drain pipe, and the water receiving trough is coaxially sleeved and fixedly mounted on the drain pipe;

[0029] A water guide bend is provided between the bottom wall of the water receiving trough and the drain pipe to connect the two. A one-way water flow component is provided in the water guide bend for allowing condensed water to flow from the water receiving trough to the drain pipe in one direction. A gap is left between the outer side of the water receiving trough and the water guide pipe for gas flow.

[0030] By adopting the above technical solution, the condensed water between the air duct and the drain pipe can be gathered and collected through the water receiving trough, and enter the water bend pipe under the restriction of the one-way water flow component and finally collected into the drain pipe, thereby realizing the connection of the air path and drainage path between the external wall panel and the inner wall and the internal cavity of the external wall panel, while effectively removing moisture between the external wall panel and the inner wall and in the internal cavity of the external wall panel, and realizing efficient condensation and discharge of condensed water.

[0031] Optionally, the one-way water flow component includes a water baffle and a spring arranged at the inlet of the water bend, the water baffle is rotatably connected to the inlet end of the water bend, the spring is arranged on the lower side of the water baffle and the two ends of the spring are respectively fixedly mounted on the water baffle and the water bend.

[0032] By adopting the above technical solution, the water baffle and the spring can more conveniently realize the opening and closing of the opening at the inlet end of the water bend and ensure the unidirectional flow of the medium (including water / gas, etc.) at the water bend.

[0033] In summary, this application includes at least one of the following beneficial technical effects:

[0034] 1. The drainage pipe, air duct, exhaust assembly, and inflation assembly work in conjunction with the exterior wall panels and interior walls to effectively drain accumulated water from the interior cavity of the exterior wall panels. Moisture accumulated in the interior cavity of the exterior wall panels, the gaps between the exterior wall panels and the interior walls, and the passages between the drainage pipe and air duct are directly extracted, reducing moisture accumulation between the exterior wall panels and the interior walls and in the interior cavity of the exterior wall panels. Dry / warm air is introduced into the gaps between the exterior wall panels and the interior walls and into the interior cavity of the exterior wall panels, preventing moisture accumulation and condensation from settling between the exterior wall panels and the interior walls and in the interior cavity of the exterior wall panels. This improves problems such as mold and wall cracking caused by moisture accumulation, condensation, and severe water accumulation on the exterior wall panels and interior walls.

[0035] 2. Through the coordination of the air guide branch pipe, connecting pipe, main joint, first branch pipe joint, second branch pipe joint, third branch pipe joint, and fourth branch pipe joint, it is possible to achieve air path connection between the entire wall surface and the internal cavity of a large area of ​​external wall panel, thereby further expanding the maximum area that can be effectively radiated by the air path of each set of exhaust components and inflation components, and more efficiently and energy-savingly achieve moisture removal between the external wall panel and the interior wall on the entire wall surface, as well as the internal cavity of the external wall panel;

[0036] 3. Through the coordination among the condensation component, the wiper component, the water receiving trough, the water elbow and the one-way water flow component, it is possible to ensure that the exhaust component extracts the moisture in the air duct while realizing the connection between the air path in the air duct and the pipeline in the drain pipe, thereby realizing the effective removal of water and moisture between the external wall panel and the internal wall and in the internal cavity of the external wall panel, as well as the efficient condensation and discharge of condensed water. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0038] Figure 2 It is a schematic diagram of the overall structure of the external wall panel;

[0039] Figure 3 It is a schematic diagram of the partial structure of an embodiment of the present application;

[0040] Figure 4 yes Figure 3 A magnified schematic diagram of part A;

[0041] Figure 5 It is a schematic diagram of the overall structure of the wiper component;

[0042] Figure 6 yes Figure 4 Schematic diagram of the half-section of the local structure.

[0043] Figure numerals: 1. External wall panel; 11. First air guide hole; 12. Drain hole; 2. Inner wall; 3. Drain pipe; 4. Air guide pipe; 42. Main joint; 43. Condensation cover; 44. Wiping component; 441. Lightweight scraper ring; 442. Sliding ring; 443. Ball bearing; 45. Water receiving trough; 46. Water guide bend; 47. One-way water flow component; 471. Water baffle; 472. Spring; 5. Exhaust assembly; 6. Inflating assembly; 7. First connecting pipe group; 71. Air guide branch pipe; 711. Horizontal pipe; 712. Vertical pipe; 72. Connecting pipe; 73. First branch pipe joint; 74. Second branch pipe joint; 75. Third branch pipe joint; 76. Fourth branch pipe joint. Implementation Method

[0044] The following is combined with Figure 1-6 This application is described in further detail.

[0045] The embodiment of the present application discloses a drainage structure for an assembled building exterior wall panel.

[0046] Reference Figure 1 and Figure 2, a prefabricated building external wall panel drainage structure includes a drainage pipe 3, an air guide pipe 4, an air extraction component 5 and an air filling component 6 arranged between the external wall panel 1 and the inner wall 2. The external wall panel 1 is hung and fixed on the surface of the inner wall 2 in rows along the horizontal extension direction of the inner wall 2. Multiple rows of external wall panels 1 are stacked row by row from bottom to top along the longitudinal extension direction of the inner wall 2 to form a whole external wall panel 1 board surface; the drainage pipe 3 is used to discharge the accumulated water between the external wall panel 1 and the inner wall 2 and in the internal cavity of the external wall panel 1, The air pipe 4 is used to connect the internal cavity of the external wall panel 1 and the exhaust component 5, and to connect the internal cavity of the external wall panel 1 and the inflation component 6. A vent hole is opened at the top of the air pipe 4 to balance the air pressure inside and outside the air pipe 4. The exhaust component 5 is used to cooperate with the air pipe 4 to extract moisture between the external wall panel 1 and the inner wall 2 and in the internal cavity of the external wall panel 1. The inflation component 6 is used to cooperate with the air pipe 4 to introduce dry gas / warm gas into the space between the external wall panel 1 and the inner wall 2 and into the internal cavity of the external wall panel 1.

[0047] Specifically, the external wall panel 1 is a rectangular panel, the long side direction of the external wall panel 1 is consistent with the lateral extension direction of the inner wall 2, and the short side direction of the external wall panel 1 is consistent with the longitudinal extension direction (generally the vertical direction) of the inner wall 2; in other application embodiments, the long side direction and short side direction of the external wall panel 1 can be adjusted, that is, the short side direction of the external wall panel 1 is consistent with the lateral extension direction of the inner wall 2.

[0048] In the examples of this application, refer to Figure 1 and Figure 2 The air duct 4 and the drainage pipe 3 are both circular tubes. The inner diameter of the air duct 4 is larger than that of the drainage pipe 3. The air duct 4, the exhaust assembly 5 and the inflation assembly 6 can all be detachably fixedly installed between the external wall panel 1 and the inner wall 2, and the air duct 4 is located between the two adjacent external wall panels 1 on the left and right.

[0049] Specifically, both sides of the short side of the external wall panel 1 are provided with arc grooves with a cross section of 1 / 4 circle toward the inner wall 2, and the two arc grooves between the two adjacent external wall panels 1 on the left and right are suitable for coaxial docking and forming a 1 / 2 semicircular groove; and the surface of the external wall panel 1 close to the inner wall 2 is also penetrated with a first air guide hole 11 and a drainage hole 12 connected to the internal cavity of the external wall panel 1, and the bottom wall of the internal cavity of the external wall panel 1 is inclined from the side away from the inner wall 2 to the side close to the inner wall 2. It is tilted downward, and the drainage hole 12 is located above the bottom wall of the internal cavity of the external wall panel 1, and the first air guide hole 11 is located above the drainage hole 12; the air guide pipe 4 is provided with a first connecting pipe group 7 for connecting the air guide pipe 4 with the internal cavity of the external wall panel 1, and the drain pipe 3 is provided with a second connecting pipe group for connecting the drainage pipe 3 with the internal cavity of the external wall panel 1. The accumulated water in the internal cavity of the external wall panel 1 can naturally flow out from the drainage hole 12 and flow into the drain pipe 3 through the second connecting pipe group for collection.

[0050] The air duct 4 can be detachably embedded between two adjacent external wall panels 1 on the left and right, and fixedly installed on the wall surface of the inner wall 2 through a pipe clamp, and the outer peripheral wall of the air duct 4 close to the external wall panel 1 is gap-fitted with the side wall of the external wall panel 1.

[0051] The drain pipe 3 is coaxially fixed to the inner side of the air duct 4. The top end of the air duct 4 protrudes inward and is provided with a number of positioning protrusions for coaxially fixing the drain pipe 3. The multiple positioning protrusions are distributed in a circular array around the axis of the exhaust pipe, and the side of the positioning protrusions away from the air duct 4 is in contact with the drain pipe 3 and has a clearance fit. An annular cavity is formed between the drain pipe 3 and the air duct 4 for the circulation of media such as water and air.

[0052] Reference Figure 1 、 Figure 3 and Figure 4 The first connecting pipe group 7 includes an air guide branch pipe 71 and a connecting pipe 72. The air guide branch pipe 71 is fixedly installed in the external wall panel 1, and the air guide branch pipe 71 includes two longitudinal pipes 712 arranged parallel to the short side of the external wall panel 1 and multiple transverse pipes 711 arranged parallel to the long side of the external wall panel 1. The multiple transverse pipes 711 are evenly spaced between the two longitudinal pipes 712, and both ends of each transverse pipe 711 are connected to the two longitudinal pipes 712 on both sides thereof; a plurality of second air guide holes connecting the cavity of the external wall panel 1 and the air guide branch pipe 71 are formed on the transverse pipe 711 and the longitudinal pipe 712, and the second air guide holes are evenly distributed on the transverse pipe 711 / longitudinal pipe 712.

[0053] A first branch pipe joint 73 is integrally provided on a longitudinal pipe 712 in the air branch pipe 71, which is close to the air branch pipe 4 and the drain pipe 3. A main joint 42 is integrally provided on the air branch pipe 4 on one side along the lateral extension direction of the inner wall 2. The first branch pipe joint 73 is exposed on the surface of the side of the external wall panel 1 close to the inner wall 2 and is connected to the corresponding longitudinal pipe 712. One end of the connecting pipe 72 is coaxially sleeved and slidingly sealed on the main joint 42, and the other end is threadedly assembled with the first branch pipe joint 73 and sealed.

[0054] Align the main joint 42 and the first branch pipe joint 73, and use the connecting pipe 72 to sleeve on the relative connection between the main joint 42 and the first branch pipe joint 73, and screw the connecting pipe 72 toward the first branch pipe joint 73 to connect and seal the main joint 42 and the first branch pipe joint 73, so that the air guide pipe 4 is connected to the air guide branch pipe 71, making it convenient for the exhaust component 5 to extract moisture in the cavity of the external wall panel 1 through the air guide branch pipe 71, and making it convenient for the inflation component 6 to introduce dry gas / warm gas into the cavity of the external wall panel 1 through the air guide branch pipe 71, so as to keep the gap between the external wall panel 1 and the inner wall 2 and the cavity of the external wall panel 1 dry.

[0055] Further, refer to Figure 1 、 Figure 2 and Figure 4 A second branch pipe joint 74 is protruding from a longitudinal pipe 712 in the air guide branch pipe 71, which is away from the first branch pipe joint 73. The second branch pipe joint 74 is also exposed on the side surface of the external wall panel 1 close to the inner wall 2 and is connected to the corresponding longitudinal pipe 712. The first branch pipe joint 73 and the second branch pipe joint 74 between the two adjacent external wall panels 1 on the left and right are suitable for being detachably fixed and sealed through two-way pipe joints of appropriate specifications.

[0056] The air guide branch pipe 71 is respectively provided with a third branch pipe joint 75 and a fourth branch pipe joint 76 protruding on both sides along the longitudinal extension direction of the inner wall 2. The third branch pipe joint 75 and the fourth branch pipe joint 76 are both exposed on the side surface of the external wall panel 1 close to the inner wall 2, and the third branch pipe joint 75 and the fourth branch pipe joint 76 between the two adjacent external wall panels 1 are also suitable for detachable fixation and sealed connection through two-way pipe joints of appropriate specifications.

[0057] During the process of installing the external wall panels 1, the construction workers can select an appropriate number of air ducts 4, drainage pipes 3, exhaust components 5 and inflation components 6 according to the actual area and number of the external wall panels 1 to be hung and installed, and determine the objects connected to the upper, lower, left and right sides of each external wall panel 1 according to the maximum suction force of the exhaust component 5, and accordingly use the first branch pipe joint 73, the second branch pipe joint 74, the third branch pipe joint 75, the fourth branch pipe joint 76 and the connecting pipe 72 / two-way pipe joint to fix and seal the external wall panel 1 and the main joint 42 on the adjacent external wall panel 1 / air duct 4; thereby realizing the air path connection between the entire wall surface / the internal cavity of the external wall panel 1 with a larger area, and expanding the maximum area that the air path of each group of exhaust components 5 and inflation components 6 can effectively radiate.

[0058] In the embodiment of the present application, the second connecting pipe group is a plurality of PVC pipes crisscrossed in a crisscross pattern, and the pipes in the second connecting pipe group are also provided with an automatic switch valve structure for limiting the one-way flow of water from top to bottom. The second connecting pipe group is suitable for connecting to the drainage holes 12 and finally converging at one or more pipes. The one or more pipes that finally converge are connected and converge at the bottom end of the drainage pipe 3, thereby realizing the natural downward flow of water in the internal cavity of the external wall panel 1.

[0059] Further, refer to Figure 4 、 Figure 5 and Figure 6In order to accelerate the condensation speed of moisture in the air duct 4, so that the moisture in the air duct 4 can condense into condensed water as quickly as possible, and effectively discharge the condensed water, a condensation component for increasing the contact area between the air and the air duct 4, a wiper component 44 for scraping the condensed water on the inner wall of the air duct 4 and the outer wall of the drain pipe 3, and a water receiving trough 45 for receiving the condensed water sliding down the drain pipe 3 are also provided between the air duct 4 and the drain pipe 3 in the embodiment of the present application.

[0060] In the embodiment of the present application, the condensation component is preferably a condensation hood 43 with upper and lower openings, a hollow interior, and a conical shape. The exhaust assembly 5 is connected to the lower end of the air duct 4. The condensation hood 43 is coaxially sleeved on the drain pipe 3 and fixedly installed between the air duct 4 and the drain pipe 3. The condensation hood 43 extends obliquely from the air duct 4 toward the drain pipe 3 from top to bottom. The outer edge of the upper opening of the condensation hood 43 is fixedly connected to the inner peripheral wall of the air duct 4, and a water passage for condensed water to pass through is formed between the edge of the lower opening and the condensation hood 43 and the outer peripheral wall of the drain pipe 3. The inner side of the condensation hood 43 is protruding with multiple ridges for increasing the inner surface area of ​​the condensation hood 43.

[0061] There are multiple groups of condensation hoods 43 between each group of air ducts 4 and drain pipes 3 along the axial direction of the drain pipe 3. The multiple groups of condensation hoods 43 are arranged at equal intervals from top to bottom on the inner side of the air duct 4, and each external wall panel 1 corresponds to a group of condensation hoods 43 on the left / right side. There is a difference in the number of hood bodies in the two adjacent groups of condensation hoods 43 above and below. The number of hood bodies in the upper group of condensation hoods 43 is smaller than the number of hood bodies in the lower group of condensation hoods 43, so that the exhaust component can effectively adapt to the actual length of the air duct 4, while ensuring the wind suction of the exhaust component to external wall panels 1 of different heights, it maximizes the residence time of moisture in the air duct 4 and the contact area between moisture and the condensation hood 43 in the air duct 4.

[0062] Reference Figure 4 and Figure 5 The wiper component 44 includes a lightweight scraper ring 441, a sliding ring 442 and a ball 443.

[0063] The lightweight scraper ring 441 is made of a flexible rubber sheet with a thickness between 0.1-0.2 cm. The lightweight scraper ring 441 is coaxially sleeved in a circular ring and slidably connected to the drain pipe 3, and the inner wall of the lightweight scraper ring 441 is gap-matched with the outer wall of the drain pipe 3, and the outer wall of the lightweight scraper ring 441 is gap-matched with the inner wall of the air duct 4. In the absence of external force, the lightweight scraper ring 441 can rely on the double friction between its inner side and the drain pipe 3 and its outer side of the air duct 4 to maintain the relative stillness between the lightweight scraper ring 441 and the drain pipe 3 and the air duct 4, and the friction coefficient between the lightweight scraper ring 441 and the drain pipe 3 is smaller than the friction coefficient between the lightweight scraper ring 441 and the air duct 4.

[0064] The sliding ring 442 is located below the lightweight scraper ring 441. The sliding ring 442 is coaxially sleeved and slidably installed on the outside of the drain pipe 3, and there are gaps between the sliding ring 442 and the drain pipe 3, and between the sliding ring 442 and the air guide pipe 4. The ball 443 is inseparable and rollingly installed on the inside of the sliding ring 442, and the sliding ring 442 is connected to the drain pipe 3 by sliding along the axial direction of the drain pipe 3 through the ball 443.

[0065] The lightweight scraper ring 441 is fixed to the top of the sliding ring 442 by a thin iron wire / other metal wire electroplated with an anti-corrosion coating, and can slide on the drain pipe 3 with the sliding ring 442; and each air duct 4 is provided with a group of wiper components 44, and the group of wiper components 44 is located at the top of the air duct 4, and the connection between the air duct 4 and the inflation component 6 is located on the upper side of the lightweight scraper ring 441, and the connection between the air duct 4 and the exhaust component 5 is located on the lower side of the lightweight scraper ring 441. In the embodiment of the present application, the exhaust component 5 and the inflation component 6 are both fans with dual functions of blowing and suction, which can be used for two purposes.

[0066] Since the top of the air duct 4 is far away from the connection point with the exhaust component 5, the condensation speed and sliding speed of the condensed water condensed on the top of the air duct 4 are relatively slow. The exhaust component 5 and the inflation component 6 are used to perform exhaust and inflation on both sides of the lightweight scraper ring 441 respectively, which can drive the lightweight scraper ring 441 to slide on the drain pipe 3 and enable the lightweight scraper ring 441 to effectively scrape the condensed water condensed on the inner wall of the top of the air duct 4 and the outer wall of the drain pipe 3.

[0067] The water receiving trough 45 is a circular solid trough, which is coaxially sleeved and fixedly installed on the drain pipe 3. A gap for gas flow is left between the outer side of the water receiving trough 45 and the water pipe. A water guide bend 46 is provided between the bottom wall of the water receiving trough 45 and the drain pipe 3 to connect the two. A one-way water flow component 47 is provided in the water guide bend 46 for allowing condensed water to flow from the water receiving trough 45 to the drain pipe 3 in one direction.

[0068] Reference Figure 4 and Figure 6 The one-way water flow component 47 includes a water baffle 471 and a spring 472 provided at the inlet of the water bend 46. The water baffle 471 is rotatably connected to the inlet end of the water bend 46. The spring 472 is provided on the lower side of the water baffle 471 and the two ends of the spring 472 are respectively fixedly mounted on the water baffle 471 and the water bend 46; the water baffle 471 and the spring 472 can more conveniently realize the opening and closing of the opening at the inlet end of the water bend 46, and ensure the one-way flow of the medium (including water / gas, etc.) at the water bend 46.

[0069] The condensed water between the air duct 4 and the drain pipe 3 can be gathered and collected through the water receiving trough 45, and enter the water bend 46 under the restriction of the one-way water flow component 47 and finally collected into the drain pipe 3, thereby realizing the connection between the external wall panel 1 and the inner wall 2 and the air path and the drainage path in the internal cavity of the external wall panel 1, and effectively realizing the connection between the air path in the air duct 4 and the pipeline in the drain pipe 3, while effectively removing the moisture between the external wall panel 1 and the inner wall 2 and in the internal cavity of the external wall panel 1, realizing the efficient condensation and discharge of the condensed water.

[0070] The implementation principle of the drainage structure of the assembled building external wall panel in the embodiment of the present application is as follows: through the cooperation of the drainage pipe 3, the air guide pipe 4, the air extraction component 5 and the inflation component 6 with the external wall panel 1 and the inner wall 2, the air extraction component 5 and the inflation component 6 are controlled to suck the air guide pipe 4, which can effectively discharge the accumulated water in the internal cavity of the external wall panel 1 and directly extract the moisture accumulated in the internal cavity of the external wall panel 1, the gap between the external wall panel 1 and the inner wall 2, and the channel between the drainage pipe 3 and the air guide pipe 4. , reducing the moisture accumulation between the external wall panel 1 and the inner wall 2 and in the internal cavity of the external wall panel 1; and being able to pass dry gas / warm gas into the gap between the external wall panel 1 and the inner wall 2 and in the internal cavity of the external wall panel 1, so that it is not easy to generate moisture accumulation and condensation water deposition between the external wall panel 1 and the inner wall 2 and in the internal cavity of the external wall panel 1, improving the surface mold, wall cracking and other problems caused by moisture accumulation, condensation water / water accumulation on the surface of the external wall panel 1 and the inner wall 2.

[0071] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A drainage structure for an assembled building exterior wall panel, characterized by: It comprises a drainage pipe (3), an air guide pipe (4), an air extraction component (5) and an air charging component (6) arranged between the external wall panel (1) and the inner wall (2); The air guide pipe (4), the air extraction assembly (5) and the air charging assembly (6) can all be detachably installed between the external wall panel (1) and the internal wall (2), and the air guide pipe (4) is provided with a first connecting pipe group (7) for connecting the air guide pipe (4) with the internal cavity of the external wall panel (1); The first connecting pipe group (7) includes an air guide branch pipe (71) and a connecting pipe (72), wherein the air guide branch pipe (71) is fixedly installed in the external wall panel (1), and a plurality of second air guide holes are provided on the air guide branch pipe (71) to connect the cavity of the external wall panel (1) and the air guide branch pipe (71), and a first branch pipe joint (73) is integrally protruded on one side of the air guide branch pipe (71) along the lateral extension direction of the inner wall (2), and the first branch pipe joint (73) is exposed on the surface of the side of the external wall panel (1) close to the inner wall (2); A main joint (42) is integrally protruded on one side of the air guide pipe (4) along the lateral extension direction of the inner wall (2); one end of the connecting pipe (72) is coaxially sleeved and slidably sealed on the main joint (42), and the other end is threadedly assembled and sealed with the first branch pipe joint (73); The drainage pipe (3) is coaxially fixed to the inner side of the air guide pipe (4), and a second connecting pipe group is provided on the drainage pipe (3) for connecting the drainage pipe (3) with the inner cavity of the external wall panel (1); A first air guide hole (11) and a drainage hole (12) communicating with the internal cavity of the external wall panel (1) are also provided on a surface of the external wall panel (1) close to the inner wall (2); The air extraction component (5) is in communication with the air guide tube (4) and is used to extract the gas in the air guide tube (4); The inflation assembly (6) is in communication with the airway tube (4) and is used to introduce gas into the airway tube (4); The top of the air guide tube (4) is also provided with an air vent hole for balancing the air pressure inside and outside the air guide tube (4); A condensation component is further provided between the air guide pipe (4) and the drain pipe (3); the air extraction assembly (5) is connected to the lower end of the air guide pipe (4); the condensation component is located between the main joint (42) and the air extraction assembly (5), and the condensation component is in contact with the inner wall of the air guide pipe (4); the condensation component is a condensation hood (43); the condensation hood (43) is fixedly installed between the air guide pipe (4) and the drain pipe (3), and the condensation hood (43) extends obliquely from the air guide pipe (4) toward the drain pipe (3); a water passage for condensed water to pass through is formed between the condensation hood (43) and the outer peripheral wall of the drain pipe (3); A wiper component (44) for scraping condensed water on the inner wall of the air guide pipe (4) and the outer peripheral wall of the drain pipe (3) is further provided between the air guide pipe (4) and the drain pipe (3), and the wiper component (44) is located between the condensation component and the main joint (42); the wiper component (44) includes a scraper ring (441), the scraper ring (441) is coaxially sleeved and slidably connected to the drain pipe (3), and the inner side wall of the scraper ring (441) is gap-matched with the outer peripheral wall of the drain pipe (3), and the outer side wall of the scraper ring (441) is gap-matched with the inner peripheral wall of the air guide pipe (4); The connecting point between the air guide tube (4) and the inflation assembly (6) and the connecting point between the air guide tube (4) and the air extraction assembly (5) are respectively located on both sides of the scraper ring (441); An annular water receiving trough (45) for receiving condensed water is further provided on the drain pipe (3) and below the condensation cover (43); the water receiving trough (45) is coaxially sleeved and fixedly mounted on the drain pipe (3); A water guide bend (46) is provided between the bottom wall of the water receiving trough (45) and the drain pipe (3) to connect the two. A one-way water flow component (47) is provided in the water guide bend (46) for allowing condensed water to flow from the water receiving trough (45) toward the drain pipe (3) in one direction. A gap for gas flow is left between the outer side of the water receiving trough (45) and the air guide pipe (4); The one-way water flow component (47) comprises a water baffle (471) and a spring (472) provided at the inlet of the water guide bend (46); the water baffle (471) is rotatably connected to the inlet end of the water guide bend (46); the spring (472) is provided on the lower side of the water baffle (471), and both ends of the spring (472) are fixedly mounted on the water baffle (471) and the water guide bend (46), respectively.

2. The drainage structure of an assembled building exterior wall panel according to claim 1, characterized in that: A second branch pipe joint (74) is provided on a side of the air guide branch pipe (71) that is away from the first branch pipe joint (73). The second branch pipe joint (74) is exposed on a surface of a side of the external wall panel (1) close to the inner wall (2). The first branch pipe joint (73) and the second branch pipe joint (74) between two adjacent external wall panels (1) are adapted to be detachably fixed and sealed.

3. The drainage structure of the assembled building exterior wall panel according to claim 2, characterized in that: The air guide branch pipe (71) is provided with a third branch pipe joint (75) and a fourth branch pipe joint (76) protruding from both sides along the longitudinal extension direction of the inner wall (2). The third branch pipe joint (75) and the fourth branch pipe joint (76) are both exposed on the surface of the outer wall panel (1) close to the inner wall (2), and the third branch pipe joint (75) and the fourth branch pipe joint (76) between two upper and lower adjacent outer wall panels (1) are suitable for detachable fixation and sealed connection.

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