Drainage cover

Abstract

The utility model provides a drainage cover which comprises a drainage cover body, the bottom end of the drainage cover body is provided with a step part, the upper end face of the step part is provided with multiple sets of drainage channels extending vertically and upwards, the multiple sets of drainage channels are evenly arranged at intervals in the length direction of the drainage cover body, and the drainage channels are of a Tesla valve flow channel appearance structure. The step part is formed at the bottom of the drainage cover, the drainage cover can be conveniently and horizontally placed in a groove opening of a drainage groove formed in a window frame below through the step part, the multiple sets of drainage channels are arranged on the upper end face of the step part at intervals, and the drainage channels are of a Tesla valve flow channel appearance structure; therefore, external rainwater or accumulated water is difficult to flow into the upper part of the step part from the drainage channel, that is, the external rainwater or accumulated water is difficult to enter the window frame; rainwater or accumulated water accumulated in the window frame can smoothly flow into the drainage groove along the drainage channel, the whole drainage structure does not need any external force, and therefore the stability of the drainage structure is better, and the drainage structure is not prone to being influenced by external factors.

Description

Technical Field

[0001] This utility model relates to the technical field of door and window drainage products, specifically to a drainage cover. Background Technology

[0002] In existing door and window drainage systems, the door and window drainage cover is an important component for drainage. Generally, a drainage hole is milled at the bottom of the door and window frame, and a drainage cover is installed above the drainage hole. The drainage cover is used to prevent rainwater or accumulated water from the outside of the door and window from seeping into the inside of the door and window, while also preventing external debris from blocking the drainage channel.

[0003] In existing technologies, in order to achieve good drainage and prevent backflow of rainwater even in severe environments such as strong winds and heavy rain, a baffle plate is installed below the drainage cover. The two ends of the baffle plate are rotatably installed at the bottom of the drainage cover via a pivot. During normal drainage, the baffle plate rotates downward and does not block the drainage channel. When encountering heavy rain and strong winds, the outdoor air pressure is higher than the indoor air pressure. The baffle plate is rotated and closed by the wind force, blocking the drainage channel and solving the problem of backflow of outdoor rainwater.

[0004] However, relying on external wind power to flip and close the baffle is uncertain. In windy and rainy weather, the direction of the wind is not fixed, which causes the baffle to sometimes not close and has poor stability. In addition, since the baffle needs to be rotated to flip, foreign objects are easily stuck to the end of the shaft during daily use, which affects the smoothness of its rotation and affects the drainage and rainwater backflow prevention effect. Utility Model Content

[0005] In view of the defects existing in the prior art, the purpose of this utility model is to provide a drainage cover to solve the problem of poor stability in the existing drainage cover with baffle flipping type, which requires external power to drive the baffle to flip and close or open.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This application provides a drainage cover, including a drainage cover body. The bottom end of the drainage cover body has a stepped portion. The upper surface of the stepped portion is provided with multiple sets of vertically upward-extending drainage channels. The multiple sets of drainage channels are evenly spaced along the length direction of the drainage cover body. The drainage channels adopt the shape structure of a Tesla valve flow channel. The drainage channels are used to suppress rainwater located at the bottom end of the stepped portion from entering the area above the stepped portion.

[0008] Furthermore, the drainage channel includes a connecting plate, the inner side of which is fixedly connected to the inner wall of the drainage cover body, the bottom end of which is fixedly connected to the upper end face of the step, and the connecting plate is provided with a first connecting wing and a second connecting wing in sequence from the outer side to the inner side. The first connecting wing and the second connecting wing are respectively provided on both sides of the connecting plate, and the first connecting wing and the second connecting wing extend obliquely to one side of the drainage cover body.

[0009] Furthermore, the outer edges of the first connecting wing located at the outer edges of the left and right sides of the main body of the drainage cover have serrated portions.

[0010] Furthermore, the drainage channel and the main body of the drainage cover are manufactured as a single piece.

[0011] The beneficial effects of this utility model are as follows:

[0012] By adopting the above-mentioned drainage cover, a step is formed at the bottom of the drainage cover. The step facilitates the horizontal placement of the drainage cover in the groove of the drainage channel opened on the lower window frame. Multiple sets of drainage channels are arranged at intervals on the upper surface of the step. The drainage channels adopt the shape structure of Tesla valve flow channel. In this way, external rainwater or accumulated water is difficult to flow into the area above the step from the drainage channels, that is, it is difficult for external rainwater or accumulated water to enter the interior of the window frame. The rainwater or accumulated water inside the window frame can flow smoothly into the drainage groove along the drainage channels. Since the entire drainage structure does not require any external force, its stability is better and it is not easily affected by external factors. This solves the problem of poor stability in the existing drainage cover with baffle flipping type structure, which requires external power to drive the baffle to flip and close or open. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the drainage cover in an embodiment of this application.

[0014] Figure 2 This is a top view of the structure of the drainage cover in an embodiment of this application.

[0015] Figure 3 This is a three-dimensional structural diagram of the drainage cover in an embodiment of this application from another angle.

[0016] Figure 4 for Figure 1 A magnified schematic diagram of the structure at point A in the diagram.

[0017] Figure 5 for Figure 2 A magnified schematic diagram of the structure at point B in the diagram.

[0018] In the picture:

[0019] 10-Drain cover;

[0020] 100 - Drain cover body;

[0021] 200-Drainage channel, 201-Connecting plate, 202-First connecting wing, 203-Second connecting wing;

[0022] 300-Step section;

[0023] 400 - Serrated section. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] See appendix Figure 1 To be continued Figure 3 As shown, this embodiment provides a drainage cover 10, including a drainage cover body 100. The bottom end of the drainage cover body 100 has a stepped portion 300. The upper surface of the stepped portion 300 is provided with multiple sets of vertically upward-extending drainage channels 200. The multiple sets of drainage channels 200 are evenly spaced along the length direction of the drainage cover body 100.

[0026] In this embodiment, the step portion 300 allows the bottom of the step portion 300 of the drainage cover to be horizontally placed on the upper surface of the opening of the drainage channel on the window frame when the drainage cover is installed on the window frame. It can be understood that the width of the drainage cover is smaller than the width of the opening of the drainage channel, so that the opening of the drainage channel is still partially connected to the top of the step portion 300 of the drainage cover. In this way, rainwater or water accumulated on the window frame can flow into the drainage channel through the drainage channel 200 for drainage.

[0027] See attached document Figure 1 Appendix Figure 2 and appendix Figure 4 As shown, in this embodiment, the drainage channel 200 adopts the shape structure of a Tesla valve flow channel. The drainage channel 200 is used to suppress rainwater located at the bottom end of the step 300 from entering above the step 300. It can be understood that, according to the characteristics of a Tesla valve, water can flow smoothly from one side to the other, while reverse flow, i.e., flowing from the other side back to this side, weakens the flow and suppresses the flow. Thus, rainwater or accumulated water on the window frame can flow smoothly into the drainage channel 200 into the drainage trough; while rainwater or accumulated water flowing in from outside the window frame is difficult to flow into the area above the step 300 through the drainage channel 200, meaning that external rainwater or accumulated water is difficult to enter the interior of the window frame. Furthermore, since the entire drainage structure does not require any external force, its stability is better and it is less susceptible to external factors.

[0028] See attached document Figure 2 and attached Figure 4As shown, the drainage channel 200 includes a connecting plate 201. The inner side of the connecting plate 201 is fixedly connected to the inner wall of the drainage cover body 100, and the bottom end of the connecting plate 201 is fixedly connected to the upper end face of the step portion 300. The connecting plate 201 has a first connecting wing 202 and a second connecting wing 203 arranged sequentially from the outer side to the inner side. The first connecting wing 202 and the second connecting wing 203 are respectively arranged on both sides of the connecting plate 201. The first connecting wing 202 and the second connecting wing 203 extend obliquely towards one side of the drainage cover body 100, that is, the first connecting wing 202 and the second connecting wing 203 are inclined towards the inner wall of the drainage cover body 100. The first connecting wing 202 and the second connecting wing 203 form an acute angle with the connecting plate 201. In some embodiments, the drainage channel 200 and the drainage cover body 100 are integrally formed.

[0029] See attached document Figure 2 and attached Figure 5 As shown, the outer edges of the first connecting wings located at the outer edges on the left and right sides of the drain cover body 100 have serrated portions 400. The serrated portions 400 are formed by multiple continuously arranged serrated patterns on the outer walls of the first connecting wings 202 at the two sides. In this way, when the drain cover body 100 is installed in the groove of the drain channel, the serrated portions 400 on the first connecting wings 202 at the left and right sides of the drain cover body 100 can be locked onto the inner wall of the groove of the drain channel, making it less likely to slip off, thereby improving the installation tightness of the drain cover body 100 in the groove of the drain channel.

[0030] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A drain cover characterized by, The device includes a drainage cover body, the bottom of which has a stepped portion. The upper surface of the stepped portion is provided with multiple sets of vertically upward-extending drainage channels. The multiple sets of drainage channels are evenly spaced along the length direction of the drainage cover body. The drainage channels adopt the shape structure of a Tesla valve flow channel. The drainage channels are used to prevent rainwater located at the bottom of the stepped portion from entering the area above the stepped portion.

2. A drain cover according to claim 1, wherein, The drainage channel includes a connecting plate, the inner side of which is fixedly connected to the inner wall of the main body of the drainage cover, and the bottom end of which is fixedly connected to the upper end face of the step portion. The connecting plate is provided with a first connecting wing and a second connecting wing in sequence from the outer side to the inner side. The first connecting wing and the second connecting wing are respectively provided on both sides of the connecting plate. The first connecting wing and the second connecting wing extend obliquely towards one side of the main body of the drainage cover.

3. A drain cover according to claim 2, wherein, The outer edges of the first connecting wing located at the outer edges of the left and right sides of the main body of the drainage cover have serrated portions.

4. The drain cover of claim 1, wherein, The drainage channel and the main body of the drainage cover are integrally formed.

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