Drainage cover convenient to assemble and capable of preventing water from flowing backwards
By designing a drainage cover structure including inner cover, outer cover and oblique seal, and using inclined support surface and limiting convex column to achieve automatic sealing, the existing drainage cover structure is solved and the problem of poor automatic sealing effect is achieved. Higher pollution protection and maintenance convenience.
Patent Information
- Application Number
- CN202420930430.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-04-29
AI Technical Summary
The existing drainage cover has a complex structure, which makes it difficult to install and disassemble, and the automatic sealing effect is poor, which can easily cause dust and mosquitoes to enter the window frame, causing pollution and aging.
A drainage cover structure including an inner cover, an outer cover and an oblique seal is designed, and the oblique seal is supported by an oblique support surface, and the hinge shaft is restricted by a limiting convex column on the outer cover to realize automatic sealing of the oblique seal.
It realizes automatic sealing effect, avoids dust and mosquitoes entering, reduces window frame pollution and aging, simplifies structural design, and facilitates assembly, disassembly and maintenance.
Smart Images
Figure CN222436241U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of door and window accessories, in particular to a drainage cover. Background Art
[0002] At present, in order to drain rainwater flowing into the top surface of the window frame, a window frame with a drainage hole opened on the outer wall of the window frame has appeared, and the drainage hole is connected to the top surface of the window frame. When there is rainwater on the top surface of the window frame, the rainwater is drained to the outside through the drainage hole to avoid rainwater backflow into the room.
[0003] In order to improve the aesthetics and grade, and to reduce the impact of strong winds on the drainage of the drain hole, a drain cover that covers the drain hole has appeared. Among them, the existing drain cover has at least one water outlet hole connected to the drain hole on its inner wall, and the water outlet hole is made to penetrate to the bottom surface of the drain cover to cover the drain hole and meet the water discharge demand. In this drain cover, the water outlet hole is directly connected to the drain hole, and there is no obstruction between them, so it is easy for dust and mosquitoes to enter the inside of the window frame through the water outlet hole and the drain hole, and even enter the room, which is easy to cause greater pollution to the window frame, which not only brings inconvenience to the user's cleaning and maintenance, but also easily leads to accelerated aging of the window frame, and even affects people's normal life.
[0004] Although drain covers with automatic sealing plates are now available, in order to meet the installation and automatic sealing requirements of the sealing plates, complex limiting structures are now designed to position the sealing plates. Therefore, the structure of such drain covers is relatively complex, which can easily lead to greater difficulty in the installation and disassembly of such drain covers, and thus easily bring inconvenience to the dredging and maintenance of such drain covers.
[0005] Therefore, it is very necessary to redesign the structure of the drain cover. Utility Model Content
[0006] The purpose of the utility model is to solve the above-mentioned problems and shortcomings, and to provide a drain cover which is easy to assemble and can prevent wind and water backflow. The drain cover can stably achieve an automatic sealing effect, which can prevent dust and mosquitoes from entering, thereby reducing the chance of pollution on the inside of the window frame, which is not only conducive to the cleaning and maintenance of the window frame, but also conducive to reducing the aging speed of the window frame and reducing the impact on the user's life; and the overall structure of the drain cover is relatively simple and reliable, which is not only conducive to the stable realization of the automatic sealing effect, but also convenient for assembly and disassembly, thereby facilitating dredging and maintenance.
[0007] The technical solution of the utility model is achieved in this way:
[0008] The cam is provided with an inner cover, an outer cover and an oblique sealing piece, wherein a transverse groove and a placement groove are respectively provided on the front wall of the inner cover, and the upper end of the placement groove is connected to the middle part of the transverse groove by docking, and the groove bottom of the placement groove is an oblique supporting surface with an upper end inclined backward, and a water outlet hole is provided in the middle part of the oblique supporting surface, which penetrates into the rear wall of the inner cover. The oblique sealing piece is placed on the oblique supporting surface, and the lower end of the oblique sealing piece can swing up and down in the placement groove, and hinge shafts are respectively provided on the left and right ends of the oblique sealing piece, and the two hinge shafts are respectively placed in the left and right ends of the transverse groove, and two limiting bosses are provided on the inner wall of the outer cover, and the outer cover can be detachably buckled on the front wall of the inner cover, and the two limiting bosses are respectively inserted into the placement groove just in front of the two hinge shafts, and a drainage hole connected to the notch of the placement groove is reserved between the lower end of the inner wall of the outer cover and the lower end of the front wall of the inner cover.
[0009] Preferably, buckling protrusions are respectively provided on the left and right ends of the outer cover, and the two buckling protrusions are buckled on the left and right ends of the inner cover respectively.
[0010] Preferably, a limiting slot is provided on the front wall of the inner cover, the transverse slot and the placement slot are both located at the bottom of the limiting slot, the outer cover is embedded in the limiting slot, and two buckling protrusions are buckled on the slot wall of the limiting slot.
[0011] Preferably, the two snap-fitting protrusions are respectively located on the left and right end surfaces of the outer cover, and the left and right ends of the inner wall of the outer cover are respectively provided with embedded protrusions, and the two embedded protrusions are respectively connected to the two snap-fitting protrusions, and the two embedded protrusions are embedded in the bottom of the limiting slot.
[0012] Preferably, the limiting slot vertically penetrates the front wall of the inner cover.
[0013] Preferably, the drain hole is a trapezoidal slot hole opened on the lower end of the inner wall of the outer cover, the longitudinal width of the drain hole gradually increases from top to bottom, and the transverse width of the drain hole gradually increases from top to bottom.
[0014] Preferably, at least one reinforcing protrusion is provided on the lower hole wall of the water hole, and the reinforcing protrusion is pressed against the inner cover.
[0015] Preferably, a transverse convex strip is provided on the inner wall of the outer cover, and the left and right ends of the transverse convex strip are respectively connected to the front ends of the two limiting convex columns, and the transverse convex strip is embedded in the transverse groove.
[0016] Preferably, the inner cover includes a front plate body, a rear block body, and two snap-on hooks. The rear block body is arranged on the middle part of the rear wall of the front plate body, and the two snap-on hooks are respectively arranged on the left and right ends of the rear block body. The transverse groove and the placement groove are both opened on the front wall of the front plate body, and the transverse groove and the placement groove are both extended backward to the rear block body, and the water outlet hole penetrates to the rear lower wall and the bottom surface of the rear block body.
[0017] Preferably, the left and right ends of the rear block are respectively provided with reinforcing protrusions, and the two reinforcing protrusions are connected to the rear wall of the front plate.
[0018] The beneficial effects of the utility model are as follows: the oblique support surface is used to support the oblique sealing piece on the drain cover, and the limiting convex column on the outer cover is used to limit the hinge axis on the oblique sealing piece to the rear side of the transverse groove, so that the oblique sealing piece can be quickly, accurately and stably limited in the drain cover, so that the oblique sealing piece can use its own gravity to stably achieve an automatic sealing effect, which can prevent dust and mosquitoes from entering, thereby helping to reduce the probability of pollution on the inside of the window frame, which is not only conducive to the cleaning and maintenance of the window frame, but also conducive to reducing the aging speed of the window frame, and can help reduce the impact on the user's life. The reliability and applicability of the drain cover are very good. In addition, the overall structure of the drain cover is relatively simple, which can facilitate the separate disassembly and assembly of the outer cover and the oblique sealing piece, so as to facilitate the dredging and maintenance of the hole grooves on the drain cover. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is one of the three-dimensional structural schematic diagrams of the drain cover in the utility model.
[0020] Figure 2 This is the second schematic diagram of the three-dimensional structure of the drain cover in the utility model.
[0021] Figure 3 This is one of the schematic diagrams of the disassembled structure of the drain cover in the utility model.
[0022] Figure 4 This is the second schematic diagram of the disassembled structure of the drain cover in the utility model.
[0023] Figure 5 This is one of the cross-sectional structural schematic diagrams of the drain cover in the utility model.
[0024] Figure 6 This is the second schematic cross-sectional structure diagram of the drain cover in the utility model.
[0025] Figure 7 This is one of the three-dimensional structural schematic diagrams of the inner cover in the utility model.
[0026] Figure 8 This is the second schematic diagram of the three-dimensional structure of the inner cover in the utility model.
[0027] Fig. 9 It is a three-dimensional structural schematic diagram of the outer cover in the utility model.
[0028] Fig.10 It is a schematic diagram of the three-dimensional structure of the oblique sealing sheet in the utility model.
[0029] Fig.11 This is one of the three-dimensional structural schematic diagrams of the utility model in use.
[0030] Fig.12 This is the second three-dimensional structural schematic diagram of the utility model in use. DETAILED DESCRIPTION
[0031] like Figures 1 to 7 As shown, the utility model is a drainage cover that is easy to assemble to prevent wind and water backflow, comprising an inner cover 1, an outer cover 2, and an oblique sealing piece 3. The front wall of the inner cover 1 is respectively provided with a transverse groove 11 and a placement groove 12, and the upper end of the placement groove 12 is connected to the middle of the transverse groove 11, and the bottom of the placement groove 12 is an oblique supporting surface 121 with an upper end inclined backward, and a water outlet 13 is provided in the middle of the oblique supporting surface 121 to penetrate to the rear wall of the inner cover 1, and the oblique sealing piece 3 is placed on the oblique supporting surface 121, and the lower end of the oblique sealing piece 3 can be It swings up and down in the placement groove 12, and the left and right ends of the inclined sealing piece 3 are respectively provided with hinge shafts 31, and the two hinge shafts 31 are respectively placed in the left and right ends of the transverse groove 11, and two limiting bosses 21 are provided on the inner wall of the outer cover 2. The outer cover 2 can be detachably buckled on the front wall of the inner cover 1, and the two limiting bosses 21 are respectively inserted into the placement groove 12 directly in front of the two hinge shafts 31, and a drainage hole 22 that is connected to the notch of the placement groove 12 is reserved between the lower end of the inner wall of the outer cover 2 and the lower end of the front wall of the inner cover 1.
[0032] On the drain cover, the inclined support surface 121 is used to support the inclined sealing piece 3, and the limiting convex column 21 on the outer cover 2 is used to limit the hinge shaft 31 on the inclined sealing piece 3 to the rear side of the transverse groove 11, so that the inclined sealing piece 3 can be quickly, accurately and stably limited in the drain cover, so that the inclined sealing piece 3 can use its own gravity to stably achieve an automatic sealing effect, which can prevent dust and mosquitoes from entering, thereby helping to reduce the probability of pollution on the inside of the window frame, which is not only conducive to the cleaning and maintenance of the window frame, but also conducive to reducing the aging speed of the window frame, and can help reduce the impact on the user's life. The reliability and applicability of the drain cover are very good. In addition, the overall structure of the drain cover is relatively simple, which can facilitate the separate disassembly and assembly of the outer cover 2 and the inclined sealing piece 3, so that it can facilitate the dredging and maintenance of the hole grooves on the drain cover.
[0033] like Figures 1 to 4 , Figure 6 and Fig. 9As shown, the left and right ends of the outer cover 2 are respectively provided with buckling protrusions 23, and the two buckling protrusions 23 are respectively buckled on the left and right ends of the inner cover 1. The buckling protrusions 23 are provided on the left and right ends of the outer cover 2, which can help to stably and reliably limit the outer cover 2 on the inner cover 1, thereby helping to further improve the reliability and stability of assembly.
[0034] like Figures 1 to 3 , Figure 7 As shown, the front wall of the inner cover 1 is provided with a limit slot 14, the transverse slot 11 and the placement slot 12 are both located at the bottom of the limit slot 14, the outer cover 2 is embedded in the limit slot 14, and the two buckling protrusions 23 are buckled on the slot wall of the limit slot 14. This can further enhance the limit effect on the outer cover 2, thereby helping to further improve the stability and reliability of the installation and positioning of the outer cover 2.
[0035] like Figure 2 , Figure 4 and Fig. 9 As shown, the two buckling convex parts 23 are respectively located on the left and right end surfaces of the outer cover 2, and the left and right ends of the inner wall of the outer cover 2 are respectively provided with embedded convex parts 24, and the two embedded convex parts 24 are respectively connected with the two buckling convex parts 23, and the two embedded convex parts 24 are embedded in the groove bottom of the limiting groove 14. The provision of the embedded convex parts 24 can not only enhance the stability and reliability of the installation and positioning of the buckling convex parts 23, but also play a limiting role on the outer cover 2, thereby further improving the stability and reliability of the installation and positioning of the outer cover 2.
[0036] like Fig. 9 As shown, the embedding protrusion 24 and the buckling protrusion 23 are both rectangular protrusions, and a guiding inclined surface 231 is provided on the outer side of the junction of the embedding protrusion 24 and the buckling protrusion 23. This not only enables the embedding protrusion 24 and the buckling protrusion 23 to have high structural strength, but also facilitates molding and processing, and can conveniently realize the buckling of the buckling protrusion 23 by guiding the guiding inclined surface 231, which can facilitate the installation and positioning of the outer cover 2.
[0037] like Figure 7 As shown, the limiting slot 14 vertically penetrates the front wall of the inner cover 1. Such a limiting slot 14 can not only play a good limiting role, but also facilitate the assembly and disassembly of the outer cover 2, and facilitate the processing of the inner cover 1.
[0038] like Fig. 9As shown, the drain hole 22 is a trapezoidal slot hole opened on the lower end of the inner wall of the outer cover 2, and the longitudinal width (here the longitudinal direction is the front-to-back direction) of the drain hole 22 gradually increases from top to bottom, and the transverse width of the drain hole 22 gradually increases from top to bottom. In this way, a drain hole 22 with a large outside and a small inside can be formed, which not only makes the discharge of rainwater very smooth, but also makes the air flow have greater resistance, thereby reducing the probability of rainwater backflow due to strong wind, and further helps to further improve the reliability and applicability of the drainage cover.
[0039] like Figure 5 and Fig. 9 As shown, at least one reinforcing convex column 221 is provided on the lower hole wall of the water hole 22, and the reinforcing convex column 221 is pressed against the inner cover 1. In this way, when the outer cover 2 adopts a thin sheet structure, the reinforcing convex column 221 can be used to make the opening of the water hole 22 have a high pressure resistance, thereby reducing the probability of the outer cover 2 being damaged by pressure.
[0040] like Figure 5 , Figure 6 and Fig. 9 As shown, a transverse convex strip 211 is provided on the inner wall of the outer cover 2, and the left and right ends of the transverse convex strip 211 are respectively connected to the front ends of the two limiting convex pillars 21, and the transverse convex strip 211 is also embedded in the transverse groove 11. The transverse convex strip 211 can not only enhance the stability and reliability of the installation and positioning of the two limiting convex pillars 21, but also play a role in stably and reliably positioning the outer cover 2, thereby helping to further improve the stability and reliability of the installation and positioning of the outer cover 2.
[0041] like Figure 7 and Figure 8 As shown, the inner cover 1 includes a front plate 15, a rear block 16, and two buckle hooks 17. The rear block 16 is arranged on the middle of the rear wall of the front plate 15. The two buckle hooks 17 are respectively arranged on the left and right ends of the rear block 16. The transverse groove 11 and the placement groove 12 are both opened on the front wall of the front plate 15, and the transverse groove 11 and the placement groove 12 are both extended backward to the rear block 16. The water outlet 13 penetrates the rear lower wall and the bottom surface of the rear block 16. This can not only control the amount of raw materials used on the inner cover 1, but also facilitate the installation and positioning of the inner cover 1 to have high reliability, and can ensure that the drainage is very smooth and comprehensive, thereby helping to further improve the reliability and applicability of the drainage cover.
[0042] like Figure 8 As shown, by providing the water outlet 13 in this way, there will not be any structure blocking the passage of rainwater at the lower middle end of the rear block 16, thereby facilitating the smooth and comprehensive passage of rainwater.
[0043] like Figure 2 , Figure 7 and Figure 8 As shown, the limit slot 14 is vertically penetrated through the front wall of the front plate 15, and the left and right slot walls of the limit slot 14 are respectively provided with buckling slots 141 for buckling the buckling convex portion 23, and the left and right slot bottoms of the limit slot 14 are respectively provided with embedding slots 142 for embedding the embedding convex portion 24, and the two embedding slots 142 are respectively connected to the rear ends of the corresponding buckling slots 141. The two buckling convex portions 23 are buckled in the buckling slots 141, and the two embedding convex portions 24 are respectively embedded in the embedding slots 142. In this way, the requirement of stable installation of the outer cover 2 can be met.
[0044] like Figure 8 As shown, the embedding groove 142 penetrates to the rear wall of the front plate body 15, which not only reduces the use of raw materials, but also facilitates molding and processing, and makes it easy to observe whether the embedding protrusion 24 and the buckling protrusion 23 are accurately installed during factory assembly.
[0045] like Figure 8 As shown, the left and right ends of the rear block 16 are respectively provided with reinforcing protrusions 18, and the two reinforcing protrusions 18 are connected to the rear wall of the front plate 15. The reinforcing protrusions 18 can not only enhance the structural strength of the inner cover 1, but also enhance the limiting effect when installing the drain cover, thereby helping to further improve the stability and reliability of the installation and positioning of the drain cover.
[0046] like Figure 8 As shown, two reinforcing protrusions 18 are respectively arranged on the upper ends of the left and right side walls of the rear block 16, and two buckle hooks 17 are respectively arranged on the lower ends of the left and right side walls of the rear block 16, and the bottom surface of the buckle protrusion 23 and the bottom surface of the rear block 16 are located in the same horizontal plane. This can facilitate the realization of a more accurate and stable positioning effect, thereby further improving the stability and reliability of the installation and positioning of the drain cover.
[0047] like Figure 8 As shown, the buckle hook 17 includes a transverse bar 171 and a buckle bar 172. One end of the transverse bar 171 is connected to the end surface of the rear block 16. The buckle bar 172 is arranged on the side of the rear block 16, and the front and rear ends of the buckle bar 172 are arranged away from and close to the side of the rear block 16, respectively, and the rear end of the buckle bar 172 is connected to the other end of the transverse bar 171. This not only facilitates the buckle hook 17 to be embedded, but also enables the buckle hook 17 to have a very strong buckle positioning effect, thereby helping to further improve the reliability and applicability of the drain cover.
[0048] like Figure 8As shown, the front end face of the buckle strip 172 is a pressing slope 1721, and the distance from the pressing slope 1721 to the rear block 16 gradually increases from the front to the rear. The use of such a pressing slope 1721 can help to play a good pressing role on window frame profiles of different thicknesses, so that even if there is a processing error in the window frame profile, the installation and positioning of the drain cover can be ensured to be very stable and reliable, thereby further improving the reliability and applicability of the drain cover.
[0049] like Figure 8 As shown, the rear wall of the transverse strip 171 is connected to the side wall of the buckle strip 172 away from the rear block 16 in an arc transition. This can well meet the needs of embedding when a small hole is opened on the window frame profile, and can facilitate the embedding process to be smoother, thereby helping to improve the convenience of installation and positioning of the drain cover in this case.
[0050] like Figures 7 to 10 As shown, the front plate 15, the rear block 16, the two buckle hooks 17 and the two reinforcing protrusions 18 are an integrally formed plastic structure; the oblique sealing sheet 3 and the two hinge shafts 31 are an integrally formed plastic structure; the outer cover 2 and the reinforcing convex column 221, the transverse convex strip 211, the two limiting convex columns 21, the two buckle convex parts 23, and the two embedded convex parts 24 are an integrally formed plastic structure. This not only facilitates the mass production of the drain cover, but also makes the drain cover have a more reliable structural strength, thereby helping to further improve the reliability of the drain cover.
[0051] like Fig.11 and Fig.12 As shown, before installing the drain cover, a rectangular mounting hole 102 is firstly opened on the convex rib 101 on the window frame 10; then the drain cover is arranged on the outer side of the convex rib 101; then two buckle hooks 17 are passed through the mounting hole 102 and buckled on the inner opening of the mounting hole 102, and the rear block 16 and the two reinforcing protrusions 18 are both embedded in the mounting hole 102. In this way, the rear block 16 and the two reinforcing protrusions 18 can be used to enhance the stability and reliability of the installation and positioning of the drain cover, thereby greatly reducing the probability of deformation and damage caused by collision, and further maintaining good performance for a long time, which can help extend the service life.
[0052] like Figure 8 and Fig.11As shown, the bottom surface of the transverse strip 171, the bottom surface of the buckle strip 172, and the bottom surface of the rear block 16 are on the same horizontal plane. The lower hole wall of the mounting hole 102 and the top surface of the window frame 10 are on the same horizontal plane, the bottom surface of the rear block 16 is pressed on the lower hole wall of the mounting hole 102 and the top surface of the window frame 10, and the bottom surface of the transverse strip 171 and the bottom surface of the buckle strip 172 are pressed on the top surface of the window frame 10, so that the rear block 16 and the buckle hook 17 can play a good supporting and positioning role, thereby further improving the stability and reliability of the installation and positioning of the drain cover. The water outlet hole 13 has no lower hole wall, which can facilitate rainwater on the top surface of the window frame to pass through the water outlet hole 13, so that the rainwater can smoothly act on the lower end of the inclined sealing piece 3, and then the water can be discharged through the lower water hole 22 after the rainwater pushes the inclined sealing piece 3 open, which can meet the demand of automatic drainage; after the water is drained away, the inclined sealing piece 3 can automatically seal by its own gravity, which can play a role in preventing wind and water backflow, so that it can meet the needs of actual use very well.
[0053] The above embodiments are preferred embodiments of the present utility model. All structures similar to the present utility model and equivalent changes made thereto should fall within the protection scope of the present utility model.
Claims
1. A drainage cover that is easy to assemble and can prevent wind and water backflow, characterized in that: The invention comprises an inner cover (1), an outer cover (2), and an inclined sealing piece (3), wherein a transverse groove (11) and a placement groove (12) are respectively provided on the front wall of the inner cover (1), and the upper end of the placement groove (12) is butted and connected with the middle part of the transverse groove (11), the bottom of the placement groove (12) is an inclined supporting surface (121) with the upper end inclined backward, and a water outlet hole (13) is provided in the middle part of the inclined supporting surface (121) and penetrates to the rear wall of the inner cover (1), and the inclined sealing piece (3) is placed on the inclined supporting surface (121), and the lower end of the inclined sealing piece (3) can swing up and down in the placement groove (12). The left and right ends of the oblique sealing piece (3) are respectively provided with hinge shafts (31), and the two hinge shafts (31) are respectively placed in the left and right ends of the transverse groove (11); the inner wall of the outer cover (2) is provided with two limiting protrusions (21); the outer cover (2) is detachably buckled on the front wall of the inner cover (1), and the two limiting protrusions (21) are respectively inserted into the placement grooves (12) directly in front of the two hinge shafts (31); and a drainage hole (22) is reserved between the lower end of the inner wall of the outer cover (2) and the lower end of the front wall of the inner cover (1) and is connected to the notch of the placement groove (12).
2. The drainage cover for preventing wind and water backflow, which is easy to assemble according to claim 1, is characterized in that: The left and right ends of the outer cover (2) are respectively provided with buckling protrusions (23), and the two buckling protrusions (23) are buckled onto the left and right ends of the inner cover (1), respectively.
3. The drainage cover for preventing wind and water backflow, which is easy to assemble according to claim 2, is characterized in that: A limit slot (14) is provided on the front wall of the inner cover (1), the transverse slot (11) and the placement slot (12) are both located at the bottom of the limit slot (14), the outer cover (2) is embedded in the limit slot (14), and the two buckling protrusions (23) are buckled on the slot wall of the limit slot (14).
4. The drainage cover for preventing wind and water backflow, which is easy to assemble according to claim 3, is characterized in that: The two buckling protrusions (23) are respectively located on the left and right end surfaces of the outer cover (2); the left and right ends of the inner wall of the outer cover (2) are respectively provided with embedded protrusions (24); the two embedded protrusions (24) are respectively connected to the two buckling protrusions (23); and the two embedded protrusions (24) are embedded in the bottom of the limit slot (14).
5. The drainage cover for preventing wind and water backflow, which is easy to assemble according to claim 3 or 4, is characterized in that: The limiting slot (14) vertically penetrates the front wall of the inner cover (1).
6. The drainage cover for preventing wind and water backflow, which is easy to assemble according to claim 1, is characterized in that: The drain hole (22) is a trapezoidal slot hole formed on the lower end of the inner wall of the outer cover (2); the longitudinal width of the drain hole (22) gradually increases from top to bottom; and the transverse width of the drain hole (22) gradually increases from top to bottom.
7. The drainage cover for preventing wind and water backflow, which is easy to assemble according to claim 1, is characterized in that: At least one reinforcing convex column (221) is provided on the lower hole wall of the water hole (22), and the reinforcing convex column (221) is pressed against the inner cover (1).
8. The drainage cover that is easy to assemble and prevents wind and water backflow according to claim 1 is characterized in that: A transverse convex strip (211) is provided on the inner wall of the outer cover (2), and the left and right ends of the transverse convex strip (211) are respectively connected to the front ends of the two limiting convex columns (21), and the transverse convex strip (211) is also embedded in the transverse groove (11).
9. The drainage cover that is easy to assemble and prevents wind and water backflow according to claim 1 is characterized in that: The inner cover (1) comprises a front plate (15), a rear block (16), and two buckle hooks (17); the rear block (16) is arranged on the middle part of the rear wall of the front plate (15); the two buckle hooks (17) are respectively arranged on the left and right ends of the rear block (16); the transverse groove (11) and the placement groove (12) are both opened on the front wall of the front plate (15), and the transverse groove (11) and the placement groove (12) are both extended backward to the rear block (16); and the water outlet hole (13) penetrates to the rear lower wall and the bottom surface of the rear block (16).
10. The drainage cover that is easy to assemble and prevents wind and water backflow according to claim 9, characterized in that: Reinforcement protrusions (18) are respectively provided on the left and right ends of the rear block body (16), and the two reinforcement protrusions (18) are connected to the rear wall of the front plate body (15).