Secondary drainage floor drain
By designing a multi-layered filtration structure and a water seal system for the secondary drainage floor drain, the problem of sewer blockage and water accumulation caused by water seepage in the bathroom is solved, achieving efficient drainage and odor and insect prevention functions, and reducing maintenance difficulty and cost.
Patent Information
- Application Number
- CN202520183407.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-05
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-02-05
AI Technical Summary
Existing bathroom floor drains are prone to clogging during drainage and cannot effectively solve the problems of seepage and water accumulation, resulting in difficult and costly repairs.
Design a secondary drainage floor drain, including an internal drainage channel, a screen, a filter screen and an outer cover. Through a multi-layer filtration structure and seepage outlets, it achieves multiple filtration and discharge of seepage water. Combined with a water storage tank, it forms a water seal to prevent odors and insects.
It effectively solves the problems of water seepage and water accumulation in the bathroom, improves drainage efficiency, reduces maintenance difficulty and cost, and has odor-proof and insect-proof functions, providing a more comfortable and healthy living environment.
Smart Images
Figure CN223893500U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drainage technology for bathroom water seepage, and more specifically, to a secondary drainage floor drain. Background Technology
[0002] Currently, bathroom floors generally employ a three-layer structure design: a waterproof layer, a mortar layer, and a tile layer from bottom to top. Although traditional floor drains can effectively remove most of the water from the tile layer, some water still seeps into the mortar layer through the tile gaps, then into the sunken area and accumulates on the floor slab. This accumulated water may leak to the lower floor through concrete defects or pipes penetrating the joints, damaging not only the building's finish but also potentially causing disputes between neighbors. More seriously, as a sealed space, the water trapped inside the sunken area can easily produce unpleasant odors, severely impacting the comfort of the living environment. Simultaneously, this trapped water increases the load on the floor slab, potentially leading to cracks and structural failure over time. Once water leakage occurs in a sunken bathroom, repairs become extremely complicated and difficult, requiring the removal of the entire floor, waterproof layer, and filling layer to drain the water before repairs and restoration. This process is not only time-consuming and labor-intensive but also costly; if a structural failure occurs, the damage is irreparable.
[0003] Existing technology discloses a check-back type secondary drain, including a connecting pipe. A waterproof layer, a mortar layer, and a tile layer are laid sequentially from bottom to top on the ground. A sewer pipe is installed within the ground. The upper end of the connecting pipe connects to a floor drain, and the lower end of the connecting pipe is inserted into the sewer pipe. A filter is fitted onto the upper end of the connecting pipe, located within the mortar layer, with the bottom surface of the filter flush with the top surface of the sewer pipe and the upper surface of the waterproof layer. An anti-backflow device is installed inside the sewer pipe to prevent backflow of water and gas, located between the outer wall of the connecting pipe and the inner wall of the sewer pipe. This secondary drain has the advantages of effectively draining water accumulated in the bathroom mortar layer and preventing water and gas backflow. However, its filtration effect on seepage from the mortar layer is poor, easily allowing fine mortar fragments from the mortar layer to enter the sewer pipe along with the drained water, which can easily cause blockages over time. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings of existing technologies that easily lead to sewer blockage when draining water seepage from bathroom floor drains. It provides a secondary drainage floor drain that can effectively solve the problem of water accumulation and leakage in sunken bathrooms. In addition, it has a better effect of filtering impurities while draining seepage water, which not only improves drainage efficiency, but also reduces maintenance difficulty and cost.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0006] A secondary drainage floor drain is provided, comprising a main body with an internal drainage channel, an outer cover, a screen, and a filter screen. The outer cover and the screen are both inserted into the main body, with the outer cover sleeved over the screen. The bottom of the outer cover abuts against the main body. The filter screen is installed inside the main body and located below the screen. The filter screen is also located inside the outer cover, with its bottom abutting against the main body. A plurality of seepage holes are arranged sequentially along the circumferential side of the main body, and a plurality of filter teeth are arranged sequentially along the circumferential side of the outer cover. The drainage from the floor drain passes through the screen and enters the drainage channel. Seepage water passes sequentially through the seepage holes, the filter teeth, and the filter screen before entering the drainage channel.
[0007] This utility model's secondary drainage floor drain not only effectively removes most of the water from the bathroom, but also allows residual water in the mortar layer to be drained back into the drainage channel through a unique seepage channel, thus effectively preventing seepage and water accumulation problems. Specifically, the main drainage passes through a screen at the top of the drain to filter impurities before entering the drainage channel and being discharged, which is an effect that conventional floor drains can achieve. Seepage water remaining in the mortar layer passes through the seepage port of the main body, the filter teeth of the outer cover, and the filter screen in sequence before entering the drainage channel and being discharged. This is secondary drainage. Through multiple filtrations by the filter teeth and the filter screen, most impurities can be filtered out, resulting in a superior filtration effect, which is the inventive point of this utility model.
[0008] Furthermore, multiple filter teeth are arranged sequentially to form a ring-shaped multi-layer structure. This ring-shaped multi-layer structure enhances the filtration effect, achieving initial filtration of large particulate impurities. Preferably, gaps exist between adjacent layers, allowing for flexible configuration of filter media, such as filter cotton or precision filter screens, according to requirements, to achieve multi-layered fine filtration. Furthermore, the spacing between adjacent filter teeth in the same layer is equal, resulting in a more rational distribution of the filter teeth and enabling impurities to be filtered from different directions and angles.
[0009] Furthermore, in the annular multilayer structure, the filter teeth of adjacent layers are staggered. This staggered arrangement enhances filtration capacity and prevents impurities from entering the drainage channel due to neglect of the outer filter teeth. Preferably, the distance between two adjacent filter teeth in the outer layer is greater than the distance between two adjacent filter teeth in the inner layer, thereby enabling multi-stage filtration. This filtration progresses gradually from coarse to fine filtration, allowing for the filtration of different impurities through the blocking effect of filter teeth in different layers.
[0010] Furthermore, the filter teeth are inclined at an angle of 8° to 10° from the outside in. This arrangement enhances the filtration effect.
[0011] Furthermore, the filter screen has multiple filter holes arranged circumferentially. The outer opening of each filter hole is defined as the water inlet, and the inner opening is defined as the water outlet. The diameter of the water inlet is greater than or equal to the diameter of the water outlet. Preferably, the filter hole diameter is 1 mm, which can effectively block impurities and reduce water flow resistance. Simultaneously, the filter screen is located below the sieve screen, allowing it to be disassembled for cleaning or replacement after the sieve screen is removed, ensuring the long-term secondary drainage function of the floor drain.
[0012] Furthermore, the height of the inlet center is higher than the height of the outlet center, and the line connecting the inlet center and the outlet center forms an angle α with the horizontal plane, the value of which is 25° to 35°. Preferably, the angle α is 30°, which can effectively block impurities and reduce water flow resistance.
[0013] Furthermore, the main body has an inclined limiting step at the point where it abuts against the outer cover and the filter screen. The inclined limiting step facilitates water seepage into the floor drain.
[0014] Furthermore, the main body has a water storage tank at its bottom, which is connected to the drainage channel. The bottom of the outer cover and the bottom of the filter screen are both located above the water storage tank, and the bottom of the screen is inserted into the water storage tank. The built-in water storage tank and screen form an odor-proof and insect-proof water seal. In addition, the water from the secondary drainage flows into the drain body and is reused as water to replenish the water seal, which can extend the odor-proof effect of the drain's water seal. This invention also has a clever feature: after the screen is disassembled, the filter screen can also be disassembled for cleaning or replacement. The filter screen can be easily removed for replacement or cleaning, preventing large particles of silt from entering the drain and sinking to the bottom of the water seal, thus avoiding insufficient water level.
[0015] Furthermore, the top of the outer cover is provided with an inclined water-collecting surface, and the outer edge of the screen abuts against the inner side of the water-collecting surface. The top of the outer cover is a water-collecting slope, which guides the water flow below, accelerates the collection of fine water streams, and achieves seepage prevention and efficient drainage.
[0016] Furthermore, the screen has a through hole in its center, above the drainage channel, communicating with the drainage channel, and a cover is provided on the through hole. The screen is equipped with double-layer drainage holes, with a through hole at the center end for easy positioning and removal of the cover. It forms an odor-proof water seal with the main body and also has an insect-proof function. The upper end of the cover has an arc-shaped protrusion for easy removal when connected to drainage facilities such as washing machines.
[0017] Compared with the prior art, the beneficial effects of this utility model are:
[0018] This utility model of a secondary drainage floor drain effectively solves the problem of water accumulation and leakage in sunken bathrooms, improves drainage efficiency, and reduces maintenance difficulty and cost. Compared with traditional secondary drainage accessories, it is installed on the upper layer of the bathroom and can directly collect, filter, and discharge seepage water that has penetrated into the mortar layer. The seepage water is reused as a water seal in the floor drain, effectively avoiding the generation of water accumulation in the sunken area and the construction and maintenance work caused by water accumulation. Compared with traditional floor drains, it not only has the efficient sewage discharge, odor prevention, and insect prevention functions of a water seal floor drain, but also has secondary sewage discharge, making it more functional and providing users with a more comfortable and healthy living environment, which is more in line with market development trends. Attached Figure Description
[0019] Figure 1 This is a first-view structural schematic diagram of a secondary drainage floor drain according to the present invention;
[0020] Figure 2 This is a structural schematic diagram of a secondary drainage floor drain according to the present invention from a second perspective;
[0021] Figure 3 for Figure 2 AA section view;
[0022] Figure 4 This is a schematic diagram of the main structure of the present utility model;
[0023] Figure 5 This is a cross-sectional view of the main body of this utility model;
[0024] Figure 6 This is a schematic diagram of the structure of the sieve of this utility model;
[0025] Figure 7 This is a cross-sectional view of the sieve of this utility model;
[0026] Figure 8 This is a first-view structural schematic diagram of the outer cover of this utility model;
[0027] Figure 9 This is a structural schematic diagram of the outer cover of this utility model from a second perspective;
[0028] Figure 10 This is a sectional view of the outer cover of this utility model;
[0029] Figure 11 This is a schematic diagram of the structure of the filter screen of this utility model;
[0030] Figure 12 This is a cross-sectional view of the filter screen of this utility model;
[0031] Figure 13 for Figure 12 A magnified view of section B.
[0032] The markings in the diagram are explained below:
[0033] 1. Main body; 11. Drainage channel; 12. Inlet; 13. Limiting step; 14. Water storage tank; 2. Outer cover; 21. Filter teeth; 22. Water collection surface; 3. Screen; 31. Through hole; 4. Filter screen; 41. Filter hole; 42. Inlet; 43. Outlet; 5. Cover; α is the angle of inclination between the line connecting the center of the inlet and the center of the outlet and the horizontal plane. Detailed Implementation
[0034] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.
[0035] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0036] Example 1
[0037] like Figures 1 to 13 The first embodiment of the secondary drainage floor drain of this utility model is shown, including a main body 1 with an internal drainage channel 11, an outer cover 2, a screen 3, and a filter screen 4. The outer cover 2 and the screen 3 are both inserted into the main body 1, and the outer cover 2 is sleeved on the outside of the screen 3. The bottom of the outer cover 2 abuts against the main body 1. The filter screen 4 is installed inside the main body 1 and located below the screen 3. The filter screen 4 is also located inside the outer cover 2 and its bottom abuts against the main body 1. A plurality of seepage holes 12 are arranged sequentially along the circumferential side of the main body 1, and a plurality of filter teeth 21 are arranged sequentially along the circumferential side of the outer cover 2. The drainage of the floor drain enters the drainage channel 11 through the screen 3, and the seepage water enters the drainage channel 11 after passing through the seepage holes 12, the filter teeth 21, and the filter screen 4 in sequence.
[0038] This utility model's secondary drainage floor drain not only effectively removes most of the water in the bathroom, but also allows residual water in the mortar layer to be drained back into the drainage channel 11 through a unique seepage channel, thus effectively preventing seepage and water accumulation problems. Specifically, the main drainage passes through the screen 3 at the top of the floor drain to filter impurities before entering the drainage channel 11 and being discharged, which is an effect that conventional floor drains can achieve. Meanwhile, the seepage water remaining in the mortar layer passes through the seepage port 12 of the main body 1, the filter teeth 21 of the outer cover 2, and the filter screen 4 in sequence before entering the drainage channel 11 and being discharged. This is secondary drainage, which is the inventive point of this utility model.
[0039] As one embodiment of this utility model, such as Figures 8 to 10 As shown, multiple filter teeth 21 are arranged sequentially to form a ring-shaped multi-layer structure. This ring-shaped multi-layer structure enhances the filtration effect, achieving initial filtration of large particulate impurities. Preferably, there are gaps between adjacent layers, within which filter media, such as filter cotton or precision filter screens, can be flexibly configured as needed to achieve multi-layer fine filtration. Furthermore, the spacing between adjacent filter teeth 21 in the same layer is equal, resulting in a more rational distribution of the filter teeth 21, and enabling impurities to be filtered from different directions and angles.
[0040] In one embodiment of this utility model, the filter teeth 21 of adjacent layers in the annular multilayer structure are staggered. The staggered filter teeth 21 enhance filtration capacity and prevent impurities from entering the drainage channel 11 due to inadequate filtration by the outer filter teeth 21. Preferably, the distance between two adjacent filter teeth 21 in the outer layer is greater than the distance between two adjacent filter teeth 21 in the inner layer, thereby achieving multi-stage filtration, progressively advancing from coarse filtration to fine filtration, thus enabling the filtration of different impurities through the blocking effect of filter teeth 21 in different layers.
[0041] In one embodiment of this invention, the filter teeth 21 are inclined at an angle of 8° to 10° from the outside in. This arrangement enhances the filtration effect.
[0042] As one embodiment of this utility model, such as Figure 11 and Figure 12 As shown, the filter screen 4 has multiple filter holes 41 arranged sequentially along its circumference. The outer opening of the filter hole 41 is defined as the water inlet 42, and the inner opening is defined as the water outlet 43. The diameter of the water inlet 42 is greater than or equal to the diameter of the water outlet 43. Preferably, the diameter of the filter hole 41 is 1 mm, which can effectively block impurities and reduce water flow resistance. At the same time, the filter screen 4 is located below the screen 3. After the screen 3 is disassembled, the filter screen 4 can also be disassembled for cleaning or replacement, which can ensure the secondary drainage function of the floor drain for a long time.
[0043] As one embodiment of this utility model, such as Figure 13As shown, the center of the inlet 42 is higher than the center of the outlet 43, and the line connecting the centers of the inlet 42 and the outlet 43 forms an angle α with the horizontal plane, the value of which is 25° to 35°. Preferably, the angle α is 30°, which can effectively block impurities and reduce water flow resistance.
[0044] In one embodiment of this utility model, the main body 1 is provided with an inclined limiting step 13 at the point where it abuts against the outer cover 2 and the filter screen 4. The inclined limiting step 13 facilitates water seepage into the floor drain.
[0045] As one embodiment of this utility model, such as Figure 8 As shown, the top of the outer cover 2 is provided with an inclined water collection surface 22, and the outer edge of the screen 3 abuts against the inner side of the water collection surface 22. The top of the outer cover 2 is a water collection slope, which guides the water flow below, accelerates the collection of fine water flow, and achieves seepage prevention and efficient drainage.
[0046] The purpose of this invention is to overcome the shortcomings of existing technologies that cannot drain water seepage from bathroom floor drains in a timely manner, and to provide a secondary drainage floor drain that can effectively solve the problem of water accumulation and leakage in sunken bathrooms, improve drainage efficiency, and reduce maintenance difficulty and cost.
[0047] Example 2
[0048] The following is a second embodiment of the secondary drainage floor drain of this utility model. This embodiment is similar to embodiment 1, except that, as Figure 4 and Figure 5 As shown, the bottom of the main body 1 is provided with a water storage tank 14, which is connected to the drainage channel 11. The bottom of the outer cover 2 and the bottom of the filter screen 4 are both located above the water storage tank 14, and the bottom of the screen 3 is inserted into the water storage tank 14.
[0049] The main body 1 has a built-in water storage tank 14 that forms an odor-proof and insect-proof water seal with the screen 3. In addition, the water from the secondary drainage flows into the main body 1 of the floor drain and is reused as water to replenish the water seal, which can extend the odor-proof effect of the floor drain's water seal. Furthermore, this invention has a clever feature: after the screen 3 is disassembled, the filter screen 4 can also be disassembled for cleaning or replacement. The filter screen 4 can be easily removed for replacement or cleaning, preventing large particles of silt from entering the floor drain and sinking to the bottom of the water seal, thus avoiding insufficient water level.
[0050] Example 3
[0051] The following is a third embodiment of a secondary drainage floor drain according to this utility model. This embodiment is similar to embodiment 1, except that, as Figure 6 and Figure 7 As shown, the screen 3 has a through hole 31 in the middle and above the drainage channel 11, which communicates with the drainage channel 11, and a cover 5 is provided on the through hole 31.
[0052] The screen 3 is equipped with double-layer drainage holes, and a through hole 31 is located at the center end to facilitate the positioning and removal of the cover 5. It works with the main body 1 to form an odor-proof water seal and also has an insect-proof function. The upper end of the cover 5 has an arc-shaped protrusion to facilitate easy removal when connected to drainage facilities such as washing machines.
[0053] This utility model of a secondary drainage floor drain effectively solves the problem of water accumulation and leakage in sunken bathrooms, improves drainage efficiency, and reduces maintenance difficulty and cost. Compared with traditional secondary drainage accessories, it is installed on the upper layer of the bathroom and can directly collect, filter, and discharge seepage water that has penetrated into the mortar layer. The seepage water is reused as a water seal in the floor drain, effectively avoiding the generation of water accumulation in the sunken area and the construction and maintenance work caused by water accumulation. Compared with traditional floor drains, it not only has the efficient sewage discharge, odor prevention, and insect prevention functions of a water seal floor drain, but also has secondary sewage discharge, making it more functional and providing users with a more comfortable and healthy living environment, which is more in line with market development trends.
[0054] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A secondary drainage floor drain, characterized in that, The system includes a main body (1) with an internal drainage channel (11), an outer cover (2), a screen (3), and a filter screen (4). The outer cover (2) and the screen (3) are inserted into the main body (1), and the outer cover (2) is fitted over the screen (3). The bottom of the outer cover (2) abuts against the main body (1). The filter screen (4) is installed inside the main body (1) and located below the screen (3). The filter screen (4) is also located inside the outer cover (2) and its bottom abuts against the main body (1). Several seepage ports (12) are arranged sequentially along the circumferential side of the main body (1), and several filter teeth (21) are arranged sequentially along the circumferential side of the outer cover (2). The drainage from the floor drain enters the drainage channel (11) through the screen (3), and the seepage water enters the drainage channel (11) after passing through the seepage ports (12), the filter teeth (21), and the filter screen (4).
2. The secondary drainage floor drain according to claim 1, characterized in that, Multiple filter teeth (21) are arranged in sequence to form a ring-shaped multilayer structure.
3. The secondary drainage floor drain according to claim 2, characterized in that, In the annular multilayer structure, the filter teeth (21) of adjacent layers are staggered.
4. The secondary drainage floor drain according to any one of claims 1 to 3, characterized in that, The filter teeth (21) are inclined at 8° to 10° from the outside to the inside.
5. The secondary drainage floor drain according to claim 1, characterized in that, The filter screen (4) has a plurality of filter holes (41) arranged in sequence along the circumference. The outer opening of the filter hole (41) is defined as the water inlet (42), and the inner opening is defined as the water outlet (43). The diameter of the water inlet (42) is greater than or equal to the diameter of the water outlet (43).
6. The secondary drainage floor drain according to claim 5, characterized in that, The height of the center of the inlet (42) is higher than the height of the center of the outlet (43). The line connecting the center of the inlet (42) and the center of the outlet (43) forms an angle α with the horizontal plane. The value of the angle α is 25° to 35°.
7. The secondary drainage floor drain according to claim 1, characterized in that, The main body (1) has an inclined limiting step (13) at the point where it abuts against the outer cover (2) and the filter screen (4).
8. The secondary drainage floor drain according to claim 1, characterized in that, The main body (1) is provided with a water storage tank (14) at the bottom. The water storage tank (14) is connected to the drainage channel (11). The bottom of the outer cover (2) and the bottom of the filter screen (4) are both located above the water storage tank (14). The bottom of the screen (3) is inserted into the water storage tank (14).
9. The secondary drainage floor drain according to claim 1, characterized in that, The outer cover (2) has an inclined water collection surface (22) on top, and the outer edge of the screen (3) abuts against the inner side of the water collection surface (22).
10. The secondary drainage floor drain according to claim 1, characterized in that, The screen (3) has a through hole (31) in the middle and above the drainage channel (11) that communicates with the drainage channel (11), and a cover (5) is provided on the through hole (31).