Floor drain

Abstract

The application provides a floor drain, which can be used in the technical field of floor drains. The floor drain comprises a floor drain grate, a floor drain body, a drain pipe and a floor drain core; the floor drain grate is arranged at the water inlet of the floor drain body; the drain pipe is hung below the floor drain body and is bent to form a water storage bend; a closed structure capable of being opened under the action of water flow is arranged at the water outlet of the drain pipe; the floor drain core comprises an elastic hose, the elastic hose is hung at the water inlet of the drain pipe, and the lower end of the elastic hose is gradually contracted and forms an elastic open-close sealing lip at the port of the lower end. The mixed sealing structure formed by the combination of the floor drain core, the water storage bend and the closed structure can not only reduce the evaporation of water in the water storage bend, prolong the action time of the water seal in the water storage bend and realize the effect of non-drying of the water seal, but also greatly improve the sealing effect and sealing reliability of the floor drain through the multiple sealing structures.

Description

Technical Field

[0001] This application relates to the field of floor drains, and more particularly to a type of floor drain. Background Technology

[0002] A floor drain is a drainage device that connects the ground to the drainage pipe system. It is an important interface connecting the drainage pipe system and the indoor floor. As an important component of the drainage system in a building, the floor drain can guide wastewater to flow smoothly into the sewer pipe.

[0003] In addition to its function of draining wastewater, the quality of a floor drain directly affects indoor air quality. Therefore, to achieve the functions of drainage and odor prevention, commercially available floor drains are generally designed with a water-sealed structure to prevent odors, insects, and other contaminants from entering the room.

[0004] However, water-sealed floor drains are prone to water seal drying out, which leads to unstable sealing reliability and affects the odor prevention effect of the floor drain. Utility Model Content

[0005] This application provides a floor drain to solve the technical problem that the existing floor drains have poor sealing reliability, which affects the odor prevention effect of the floor drains.

[0006] According to the first aspect disclosed in this application, this application provides a floor drain, including a floor drain grate, a floor drain body, a drain pipe, and a floor drain core;

[0007] The drain grate is installed at the water inlet of the drain body;

[0008] The drain pipe is suspended below the main body of the floor drain and bent to form a water trap. The outlet of the drain pipe is equipped with a closed structure that can be opened under the action of water flow.

[0009] The drain core includes an elastic hose, which is suspended at the inlet of the drain pipe. The lower end of the elastic hose gradually contracts and forms a sealing lip that can be elastically opened and closed at the lower end port.

[0010] In one possible implementation, the enclosure structure includes a cover plate, one side of which is hinged to the outlet side of the drain pipe.

[0011] In the closed state, the cover plate closes onto the outlet of the drain pipe based on its own weight.

[0012] In one feasible implementation, the sealing lip is an arc-shaped seal in the closed state.

[0013] In one feasible implementation, the arc-shaped seal is S-shaped, and the circumference of the arc-shaped seal is equal to the circumference of the water inlet at the upper end of the elastic hose.

[0014] In one possible implementation, the cross-section of the drain pipe is set to be elliptical.

[0015] In one feasible implementation, the drain grate is provided with a water pipe connector, and the outlet of the water pipe connector is directly opposite the inlet of the drain pipe.

[0016] In one feasible implementation, a corner seal is provided at one corner of the water inlet of the drain body. The corner seal is used to press down one corner of the drain grate to position and install the drain grate.

[0017] In one feasible implementation, the drain body has a first pin hole at one corner opposite to the corner seal, and the drain grate has a second pin hole at one corner.

[0018] The drain grate is positioned and installed by inserting positioning pins into the first pin hole and the second pin hole.

[0019] In one feasible implementation, the drain grate includes multiple horizontal and vertical grid bars, which intersect vertically to form multiple grid filter holes.

[0020] In one feasible implementation, the drain body further includes a water collection pipe, and the drain pipe is suspended in the water collection pipe;

[0021] The lower end of the water collection pipe contracts to form a drain outlet that can be inserted into a sewer pipe.

[0022] Compared with the prior art, this application has the following beneficial effects:

[0023] This application provides a floor drain in which wastewater flows through the drain grate into the drain core during use. The water flow forces open the sealing lip of the drain core, allowing the wastewater to flow into the trap within the drain pipe. When the trap is full, the wastewater overflows from the drain pipe outlet, opening the sealing structure and draining the wastewater into the sewer pipe. After drainage, the drain core's sealing lip springs back to its closed state due to the elasticity of the flexible hose. The water remaining in the trap forms a water seal, and the sealing structure re-closes the drain pipe outlet after the water flow ceases. This hybrid sealing structure, combining the drain core, trap, and sealing structure, reduces water evaporation in the trap by sealing the drain pipe inlet and outlet, extending the water seal's duration and preventing it from drying out. Furthermore, the multiple sealing elements significantly improve the floor drain's sealing effect and reliability. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0025] Figure 1 This is a schematic diagram of the structure of an existing floor drain provided in an embodiment of this application;

[0026] Figure 2 A schematic diagram of the structure of a conventional floor drain grate provided in an embodiment of this application;

[0027] Figure 3 This is a schematic diagram of the structure of a conventional floor drain filter provided in an embodiment of this application;

[0028] Figure 4 A schematic diagram of another existing floor drain filter provided in this application embodiment;

[0029] Figure 5 This is a schematic diagram of the structure of a floor drain provided in an embodiment of this application;

[0030] Figure 6 This is a schematic diagram of the structure of a drainage pipe provided in an embodiment of this application;

[0031] Figure 7 A schematic diagram of the structure of the straight sealing lip drain core provided in the embodiment of this application in a closed state;

[0032] Figure 8 for Figure 7 Top view;

[0033] Figure 9 A schematic diagram of the open state of the straight sealing lip drain core provided in the embodiment of this application;

[0034] Figure 10 This is a schematic diagram of the structure of a floor drain core provided in an embodiment of this application;

[0035] Figure 11 for Figure 10 Top view;

[0036] Figure 12 A schematic diagram of a drain core in the open state, provided in an embodiment of this application;

[0037] Figure 13 A top view of an elliptical drain pipe provided in an embodiment of this application;

[0038] Figure 14 A top view of an elliptical drain core provided for an embodiment of this application;

[0039] Figure 15A schematic diagram showing the cross-sectional dimensions of the drain pipe inside the water collection pipe when the drain pipe of the floor drain provided in the embodiments of this application is circular or elliptical.

[0040] Figure 16 This is a schematic diagram of the structure of a drain grate provided in an embodiment of this application.

[0041] Explanation of reference numerals in the attached figures:

[0042] 100-Floor drain grate;

[0043] 101 - Water pipe connector;

[0044] 102-Positioning pin;

[0045] 103 - Horizontal slats;

[0046] 104 - Longitudinal bars;

[0047] 200 - Drain body;

[0048] 201-Corner Seal;

[0049] 202-Threaded clamping ring;

[0050] 203 - Sealing ring;

[0051] 300-Filter;

[0052] 400-Inner tube;

[0053] 500-outer tube;

[0054] 600 - Drainage pipe;

[0055] 700-Floor drain core;

[0056] 701 - Installation collar;

[0057] 702 - Flexible Hose;

[0058] 703 - Sealing lip;

[0059] 800-cover plate;

[0060] 900 - Drain pipe;

[0061] 1000-Water collection pipe;

[0062] 1001 - Drain outlet.

[0063] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0064] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0065] A floor drain is a drainage device that connects the ground to the drainage pipe system. It is an important interface connecting the drainage pipe system and the indoor floor. As an important component of the drainage system in a building, the floor drain can guide wastewater to flow smoothly into the sewer pipe.

[0066] In addition to its function of draining wastewater, the quality of a floor drain directly affects indoor air quality. Therefore, to achieve both drainage and odor prevention, commercially available floor drains are generally designed with a water-sealing structure to prevent odors, insects, and other contaminants from entering the room. This water-sealing structure typically involves a bend in the drain pipe to form a water trap. When water flows through the drain, some water remains in this trap, creating a water seal. This water seal acts as a barrier, preventing foul odors and insects from entering the room and maintaining fresh and hygienic indoor air.

[0067] However, the water in the water seal will naturally evaporate in dry environments or when the drain is not used for a long time (such as in a spare bathroom or balcony drain), causing the seal to fail. Alternatively, when the upstairs neighbor flushes, a washing machine drains, or the air pressure in the duct changes, negative pressure may be generated inside the pipe, drawing water out of the water seal and creating a "siphon effect," thus compromising its seal. Therefore, water-sealed floor drains are susceptible to water seal drying out, leading to unstable sealing reliability and affecting the drain's odor-proof performance.

[0068] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this is a common water-sealed dual-purpose floor drain (for both surface water and appliance drainage), which includes a drain grate 100, a drain body 200, a filter screen 300, an inner pipe 400, and an outer pipe 500. The inner pipe 400 and the outer pipe 500 are nested together, and a water collection cup is formed below the outlet of the outer pipe 500. The water remaining in the collection cup forms a water seal to prevent odors or insects from entering the room.

[0069] During use, it was found that it is prone to problems such as backflow, screen clogging, excessively long drainage time, and water seal drying. Analysis revealed the following reasons:

[0070] 1. The inlet and outlet of the water seal are exposed to the atmosphere. Over time, the water seal will dry out due to natural evaporation, and the musty smell of the sewer and even insects and rodents will enter the room.

[0071] 2. The outer pipe 500 of the floor drain is installed in the DN50 building drain pipe. Due to the limitation of the drain pipe diameter, the effective drainage cross-sectional area of ​​the floor drain is insufficient, resulting in low drainage efficiency and easy backflow. To prevent backflow, most floor drains now use a water pipe connector 101 with a reduced inner diameter to limit the flow. For example, the inner diameter of the drain pipe of a top-loading washing machine is Φ28mm, and the water pipe connector inner diameter of commercially available floor drains is reduced to Φ15mm. However, this will affect the drainage efficiency and cause the drainage time to be too long.

[0072] 3. The filter screen 300 below the drain grate 100 is installed at the water inlet of the drain body 200. Due to the limitation of its diameter, the effective drainage cross-sectional area is small. Moreover, the filter screen 300 is located below the drain grate 100, which not only makes it difficult to clean, but also easily causes debris to clog the screen.

[0073] To address the aforementioned technical problems, this application proposes a floor drain that utilizes a hybrid sealing structure formed by a drain core, a water trap, and a sealing structure to seal the water surface of the water trap. This not only reduces water evaporation within the water trap and prolongs the duration of the water seal, thus preventing the water from drying out, but also significantly improves the sealing effect and reliability of the floor drain through the multiple sealing structures.

[0074] The technical solution of the floor drain provided in this application will be described in detail below through specific embodiments. It should be noted that the following embodiments may exist alone or in combination with each other, and the same or similar content may not be described again in different embodiments.

[0075] Figure 5 This is a schematic diagram of the structure of a floor drain provided in an embodiment of this application. (See attached diagram.) Figure 5 In some embodiments, the drain includes a drain grate 100, a drain body 200, a drain pipe 900, and a drain core 700; the drain grate 100 is located at the inlet of the drain body 200; the drain pipe 900 is suspended below the drain body 200 and bent to form a water trap, and the outlet of the drain pipe 900 is provided with a closed structure that can be opened under the action of water flow; the drain core 700 includes an elastic hose 702, which is suspended at the inlet of the drain pipe 900, and the lower end of the elastic hose 702 gradually contracts and forms a sealing lip 703 that can be elastically opened and closed at the lower end port.

[0076] In this embodiment, wastewater flows through the drain grate 100 into the drain core 700. The water flow forces open the sealing lip 703 of the drain core 700, allowing the wastewater to flow into the trap of the drain pipe 900. When the trap is full, the wastewater overflows from the outlet of the drain pipe 900, opening the sealing structure and draining the wastewater into the sewer pipe 600. After drainage, the drain core 700's sealing lip 703 returns to its closed state due to the elasticity of the flexible hose 702. The water remaining in the trap forms a water seal, and the sealing structure re-closes the outlet of the drain pipe 900 after the water flow ceases. The hybrid sealing structure formed by the combination of drain core 700, water trap and sealing structure can reduce water evaporation in water trap by sealing the inlet and outlet of drain pipe 900, prolong the water seal duration in water trap and achieve the effect of water seal not drying out, and greatly improve the sealing effect and sealing reliability of drain through multiple sealing structures.

[0077] See Figure 6 Specifically, the drain pipe is bent upwards at 90° to form a U-shaped water trap.

[0078] See Figure 10 Specifically, to address the issue of water evaporation from the water seal, a drain core 700 composed of a flexible hose 702 is installed inside the inlet of the drain pipe 900. The flexible hose 702 is an elastically closed structure that can be opened under the action of water flow. The lower sealing lip 703 of the drain core 700 can open outwards due to the impact of wastewater to form an opening for wastewater discharge. When no wastewater flows through, the sealing lip 703 can close and seal again under its elasticity, achieving a mechanical seal and preventing odors and insects from entering the room.

[0079] In addition, to solve the problem of water evaporation from the water seal, a closed structure that opens under the action of water flow is installed at the outlet of the 900 drain pipe. This allows the closed structure to open due to the impact of wastewater to discharge the wastewater. When no wastewater flows through, the closed structure returns to the closed state, achieving a mechanical seal and preventing odors and insects from entering the room.

[0080] See Figure 10 Specifically, the flexible hose 702 consists of an upper section, a middle section, and a lower section. The upper section is a straight pipe that fits against the wall of the drain pipe 900. The lower section is a flat, sealed end with two inner sides fitting together. The middle section is a gradually contracting "V"-shaped transition section that connects the upper and lower sections.

[0081] Since the sealing lip 703 needs to be tightly sealed in the closed state, the middle section of the flexible hose is a V-shaped connecting tube to provide sufficient elastic deformation space for the sealing lip 703 when it is opened and unfolded. Furthermore, after being stretched open, the V-shaped connecting tube can also provide a restoring elastic force to the sealing lip 703 to ensure that the sealing lip 703 can subsequently contract and close normally.

[0082] Since the sealing lip 703 opens under the action of wastewater, it takes a certain amount of time to go from closed to open. If the distance between the inlet of the drain core 700 and the sealing lip 703 is too short, the sealing lip 703 may not be able to drain the wastewater in time, leading to overflow. By appropriately extending the upper straight section of the flexible hose 702, the overall length of the drain core 700 can be increased, thus extending the distance between the inlet of the drain core 700 and the sealing lip 703. This guides the wastewater to drain smoothly from the sealing lip 703, reducing overflow and ensuring smooth drainage.

[0083] Specifically, the material of the plastic drain core 700 is silicone. The main component of silicone is silicon dioxide, which is chemically stable and has good elasticity, making it resistant to permanent deformation due to external forces.

[0084] Specifically, the drain body 200 is provided with an installation step for hoisting the drain pipe 900. A sealing ring 203 is provided between the drain body 200 and the drain pipe 900 to prevent harmful gases from overflowing into the room from the sewer.

[0085] See Figure 5 Optionally, to improve the stability of the drain pipe 900 installation, a threaded clamping ring 202 is provided on the drain pipe 900. The threaded clamping ring 202 is used to press and fix the drain pipe 900 to the outlet of the drain body 200 to prevent the drain pipe 900 from falling off or shifting. At the same time, it provides pre-tightening force for the sealing ring 203 to be pressed tightly between the drain pipe 900 and the drain body 200.

[0086] See Figure 6 In some embodiments, the closure structure includes a cover plate 800, one side of which is hinged to the outlet side of the drain pipe 900; wherein, in the closed state, the cover plate 800 closes onto the outlet of the drain pipe 900 based on its own weight.

[0087] During drainage, the cover plate 800 can overcome its own weight and flip upwards under the impact of water flow, thereby opening the outlet of the drain pipe 900 and realizing drainage. When not draining, the cover plate 800 closes on the outlet of the drain pipe 900 based on its own weight. By setting the cover plate 800, the water seal evaporation surface of the water trap outlet can be sealed, and the intrusion of odors and insects from the sewer pipe 600 can be prevented.

[0088] See Figure 11 In some embodiments, the sealing lip 703 is an arc-shaped seal when closed.

[0089] The drain core 700 utilizes a resiliently opening and closing sealing lip 703 for sealing. During drainage, the bottom sealing lip 703 is opened by water; after drainage, the sealing lip 703 automatically closes due to its own elasticity, achieving an odor-proof effect. However, the existing drain core 700 suffers from a problem of not being able to balance drainage efficiency and sealing performance.

[0090] See Figure 7 , Figure 8 and Figure 9 The existing drain core 700 has an upper water-receiving chamber 702 with a tubular shape and a "V"-shaped transition connection in the middle. The lower sealing lip 703 is made of two elastic rubber sheets that are bonded together to form an elastic seal. The sealing lip 703 has a straight-line shape. When wastewater is discharged into the water-receiving chamber and flows to the sealing lip 703, the water flow opens the two sealing rubber sheets and drains the water. When the water is drained, the two sealing rubber sheets return to their original position and seal under the action of memory elasticity. In the silicone drain core 700 with a straight sealing lip 703, the width of the sealing lip 703 is equal to the width of the water inlet cavity. Assuming that the silicone drain core 700 with a straight sealing lip 703 is installed in a circular drain pipe and the water inlet cavity is circular, the circumference of the outlet of the sealing lip 703 is equal to 2d (d is the diameter of the water inlet cavity), which is less than the circumference of the inlet of the water inlet cavity πd. Therefore, the cross-sectional area of ​​the outlet of the sealing lip 703 is less than the cross-sectional area of ​​the inlet of the water inlet cavity, and will be at least 59% smaller.

[0091] contrast Figure 10 , Figure 11 and Figure 12 By setting the sealing lip 703 to an arc shape, compared with the straight sealing lip 703, the outlet cross-sectional area of ​​the sealing lip 703 can be increased, thereby improving the drainage efficiency of the drain core 700.

[0092] Therefore, in this embodiment, by setting the sealing lip 703 of the drain core 700 to an arc shape, the drain core 700 can balance drainage efficiency and sealing performance, and while achieving efficient drainage, it also has good odor prevention performance.

[0093] See Figure 11 Optionally, the arc-shaped seal is S-shaped, and the circumference of the arc-shaped seal is equal to the circumference of the water inlet at the upper end of the flexible hose 702.

[0094] When the arc-shaped seal is S-shaped, and the circumference of the arc-shaped seal is the same as the circumference of the water inlet at the upper end of the elastic hose 702, the cross-sectional area of ​​the water inlet of the drain pipe 900 is equal to the cross-sectional area of ​​the water outlet, thereby maximizing the drainage efficiency of the drain core 700 while meeting the sealing requirements.

[0095] For example, suppose the upper part of the flexible hose 702 is circular with a diameter of d and a circumference of πd, and its cross-sectional area is... .

[0096] When the lower sealing lip 703 is a straight line, since its width is equal to the upper diameter, the circumference of the sealing lip 703 is 2d. The shape with the largest cross-sectional area during drainage is circular, with a circumference also of 2d, and its diameter is... Its theoretical cross-sectional area for water passage is .

[0097] When the lower sealing lip 703 is S-shaped, its perimeter is equal to that of the upper part, meaning the upper and lower drainage cross-sectional areas are equal. Therefore, the theoretical water passage cross-sectional area of ​​the S-shaped lip is... .

[0098] Therefore, when the sealing lip 703 is S-shaped, its water passage capacity is improved compared to when the sealing lip 703 is straight. .

[0099] See Figure 10 Optionally, the drain core 700 also includes an installation collar 701, which is located at the upper end of the flexible hose 702. The installation collar 701 is installed in conjunction with the inlet of the drain pipe 900 so that the flexible hose 702 is suspended inside the drain pipe 900.

[0100] The installation collar 701 is inserted into the inlet of the drain pipe 900, thereby suspending the flexible hose 702 inside the drain pipe 900. The installation collar 701 has a simple structure and is easy to install.

[0101] See Figure 13 In some embodiments, the cross-section of the drain pipe 900 is set to be elliptical.

[0102] in, Figure 15 For the drain pipe 900 provided in the embodiments of this application, when the drain pipe 900 is circular or elliptical, the cross-sectional dimensions of the drain pipe 900 within the water collection pipe 1000 are shown in the schematic diagram. Figure 15It can be seen that, with the water collection pipe 1000 having the same specifications, when the cross-section of the drain pipe 900 of the floor drain is either circular or elliptical, the cross-sectional area of ​​the elliptical drain pipe 900 is larger than that of the circular drain pipe 900. This effectively increases the drainage capacity of the drain pipe 900, thereby improving the drainage efficiency of the floor drain. Therefore, by setting the cross-section of the drain pipe 900 of the floor drain to elliptical, the cross-sectional area of ​​the drain pipe 900 can be sufficiently enlarged while maintaining the same size specifications for the water collection pipe 1000, thus improving the drainage efficiency of the floor drain.

[0103] Specifically, when the cross-section of the drain pipe 900 is set to an elliptical shape, refer to... Figure 14 At this time, the drain core 700 is also set to an ellipse shape.

[0104] Specifically, by setting the cross-section of the drain pipe 900 to an elliptical shape, an ideal configuration can be achieved where the inlet, outlet, and drain each occupy one-third of the cross-sectional area of ​​the collection pipe 1000. Assuming the inner diameter of the collection pipe 1000 is d, its cross-sectional area is... When the drain pipe is circular (90°), its cross-sectional area is: The proportion of the 1000 cross-sectional area of ​​the water collection pipe is When the drain pipe 900 is elliptical, it occupies up to one-third of the cross-sectional area of ​​the collection pipe 1000. Therefore... This means that the drainage capacity of the 900 drain pipe can be increased by 33%.

[0105] See Figure 5 In some embodiments, the drain grate 100 is provided with a water pipe connector 101, and the outlet of the water pipe connector 101 is directly opposite the inlet of the drain pipe 900.

[0106] The water pipe connector 101 is used to connect to the wastewater pipe of appliances such as washing machines, so that wastewater can be directly discharged into the floor drain. The water pipe connector 101 is directly opposite the inlet of the drain pipe 900, so that the drainage from appliances such as washing machines can directly flush the sediment at the bottom of the water trap. Since the water trap has a U-shaped structure, the drainage flows down and out along the arc of the U-shape, thereby maximizing the flushing force of the water flow, greatly improving the self-cleaning ability of the floor drain, and preventing the floor drain from becoming clogged and backflowing.

[0107] Specifically, the inner cavity of the water pipe connector 101 is a conical structure that is larger at the top and smaller at the bottom. The inner cavity of the water pipe connector 101 is designed with a conical structure that is larger at the top and smaller at the bottom so that the drainage of appliances such as washing machines forms a jet, thereby further enhancing the flushing force on the bottom of the water trap.

[0108] See Figure 16Optionally, a corner seal 201 is provided at one corner of the water inlet of the drain body 200. The corner seal 201 is used to press down one corner of the drain grate 100 to position and install the drain grate 100.

[0109] Traditionally, the drain grate 100 is directly placed on the drain body 200. This can easily cause it to warp or shift when the water pipe connector 101 is connected to appliances such as washing machines, as these appliances are running. To address this, a corner seal 201 is installed at one corner of the drain body 200's inlet. This corner seal 201 positions and secures the drain grate 100, preventing it from shifting.

[0110] See Figure 16 Optionally, the drain body 200 has a first pin hole at the opposite corner of the corner seal 201, and the drain grate 100 has a second pin hole at one corner; wherein, the drain grate 100 is positioned and installed by inserting the positioning pin 102 into the first pin hole and the second pin hole.

[0111] In addition to the corner seal 201, a first pin hole is provided at the other corner of the drain body 200 that is symmetrical to the corner seal 201, and a second pin hole is provided at the corresponding corner of the drain grate 100. Thus, the drain grate 100 can be completely fixed to the drain body 200 by the positioning pin 102 and the pin hole.

[0112] See Figure 16 In some embodiments, the drain grate 100 includes a plurality of horizontal grid bars 103 and vertical grid bars 104, which intersect vertically to form a plurality of grid filter holes.

[0113] The drain grate 100 can prevent dirt and debris from entering the drain. In places such as kitchens or bathrooms, food scraps, hair and other debris often fall on the ground. Without the filtering function of the drain grate 100, these debris will enter the drain, which may cause the drain to be blocked by dirt or debris and cause sewage backflow and other problems.

[0114] Traditional drain grates 100 have a single layer of grates, with a secondary filter 300 underneath. In this embodiment, the drain grates 100 have a double layer of grates, eliminating the need for the secondary filter 300 and reducing the workload of cleaning the drain. By designing the drain grates 100 with two rows of perpendicular grates, the resulting mesh can intercept debris from any direction, especially long hair, effectively improving the drain grates 100's debris-catching effect. This also makes the drain grates 100 easier to clean, reducing the frequency of cleaning clogged mesh.

[0115] See Figure 5In some embodiments, the drain body 200 also includes a water collection pipe 1000, and a drain pipe 900 is suspended in the water collection pipe 1000. The lower end of the water collection pipe 1000 is contracted to form a drain outlet 1001 that can be inserted into the sewer pipe 600.

[0116] In traditional floor drain structures, the outer pipe 500 is directly inserted into the building's drainage pipe 600, resulting in a small drainage gap and affecting drainage efficiency. In this embodiment, a water collection pipe 1000 is provided at the lower part of the floor drain body 200, and the drain pipe 900 is suspended and installed inside the water collection pipe 1000. By adding the water collection pipe 1000, drainage is performed through the drain outlet 1001 at the lower end of the water collection pipe 1000 into the building's drainage pipe 600. The upper inner diameter of the water collection pipe 1000 can be designed to be much larger than the inner diameter of the building's drainage pipe 600. Therefore, the cross-sections of each drainage component of the floor drain can be designed as needed, freed from the size limitations of the building's drainage pipe 600, giving it sufficient drainage size and capacity, greatly improving the drainage efficiency of the floor drain, and effectively preventing backflow during drainage.

[0117] The above embodiments will be further explained below with reference to specific tests:

[0118] Drain body 200: Material: 304 stainless steel, Specifications: 100×100×4mm, Internal thread M90×2.

[0119] Floor drain grate 100: Material: 304 stainless steel, Specifications: 92×92mm; Upper row of bars: 5mm wide at the top and 3mm wide at the bottom, with a gap of 4.7mm; Lower row of bars: 2mm wide, with a gap of 5mm; Support beam: 5mm wide.

[0120] Drain pipe 900: Material is ABS engineering plastic; the major axis clearance of the ellipse at the inlet is 54mm and the minor axis clearance is 35.5mm; the major axis clearance of the ellipse at the outlet is 54mm and the minor axis clearance is 30.5mm.

[0121] Floor drain core 700: Material is silicone; upper section thickness is 1.5mm.

[0122] Cover plate 800: Material selected is ABS engineering plastic.

[0123] Water collection pipe 1000: Material is 304 stainless steel, specification Φ85×0.7; lower end constricted outer diameter Φ45.

[0124] Sealing ring 203: Oil- and acid- and alkali-resistant O-ring rubber, specification Φ80×3.55.

[0125] Specific calculations:

[0126] Floor drain grate 100 water flow capacity:

[0127] Top row: 4.7×92×6+4.7×46×2+4.7×56×2=3553 .

[0128] Bottom row: 4.8×92×1+5×92×5+4.8×67.6×1+5×67.6×1+5×4×48.2=4368 .

[0129] Water pipe connector 101 water flow capacity: .

[0130] The inlet pipe of the water trap is oval-shaped, and the silicone sleeve inside the drain core (700mm) is 1.5mm thick. Therefore, the water flow capacity is: .

[0131] Water flow capacity of the trap outlet: .

[0132] Projected area of ​​the water trap in the 1000-meter water collection pipe (top view):

[0133] .

[0134] 1000 net cross-sectional area of ​​water collection pipe with reduced opening .

[0135] Net drainage cross-sectional area of ​​water collection pipe 1000: .

[0136] According to experiments, the water flow capacity of the U-shaped water trap in this application system is as follows: when both the inlet and outlet pipes are round pipes, and the inner diameter of the outlet of the drain pipe of the pulsator washing machine is Φ28mm, then the inner diameter of the inlet pipe of the water trap is Φ30mm, and backflow will occur if the diameter is smaller than this. Therefore, 30mm is the critical point for no backflow, and its cross-sectional area is... As can be seen from the above calculations, all calculated items are much larger than... At least 83% larger, therefore, when the pulsator washing machine drains (open drain), the drain of this application will not backflow. Generally speaking, the drainage of other appliances and showers is smaller than that of the pulsator washing machine, so it is also applicable to other appliances.

[0137] Meanwhile, because mechanical seals are installed at both the inlet and outlet of the water trap, the contact channel between the sealed water and the atmosphere is closed, thus greatly reducing the natural evaporation capacity of the water seal and achieving an ideal water-sealed floor drain that does not dry out for a long time.

[0138] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0139] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0140] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0141] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0142] In the above embodiments, the descriptions of each embodiment have their own emphasis. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.

[0143] Other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of the technical content disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the appended claims.

[0144] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A floor drain, characterized in that, Includes drain grate, drain body, drain pipe and drain core; The drain grate is installed at the water inlet of the drain body; The drain pipe is suspended below the main body of the floor drain and bent to form a water trap. The outlet of the drain pipe is equipped with a closed structure that can be opened under the action of water flow. The drain core includes an elastic hose, which is suspended at the inlet of the drain pipe. The lower end of the elastic hose gradually contracts and forms a sealing lip that can be elastically opened and closed at the lower end port.

2. The floor drain according to claim 1, characterized in that, The enclosed structure includes a cover plate, one side of which is hinged to the outlet side of the drain pipe. In the closed state, the cover plate closes onto the outlet of the drain pipe based on its own weight.

3. The floor drain according to claim 1, characterized in that, The sealing lip is an arc-shaped seal when closed.

4. The floor drain according to claim 3, characterized in that, The arc-shaped seal is S-shaped, and the circumference of the arc-shaped seal is equal to the circumference of the water inlet at the upper end of the elastic hose.

5. The floor drain according to claim 1, characterized in that, The cross-section of the drain pipe is set to be elliptical.

6. The floor drain according to any one of claims 1-5, characterized in that, The drain grate is equipped with a water pipe connector, and the outlet of the water pipe connector is directly opposite the inlet of the drain pipe.

7. The floor drain according to claim 6, characterized in that, A corner seal is provided at one corner of the water inlet of the drain body. The corner seal is used to press down one corner of the drain grate to position and install the drain grate.

8. The floor drain according to claim 7, characterized in that, The drain body has a first pin hole at one corner opposite to the corner seal, and the drain grate has a second pin hole at one corner. The drain grate is positioned and installed by inserting positioning pins into the first pin hole and the second pin hole.

9. The floor drain according to any one of claims 1-5, characterized in that, The drain grate includes multiple horizontal and vertical grid bars, which intersect vertically to form multiple grid filter holes.

10. The floor drain according to any one of claims 1-5, characterized in that, The drain body also includes a water collection pipe, and the drain pipe is suspended in the water collection pipe. The lower end of the water collection pipe contracts to form a drain outlet that can be inserted into a sewer pipe.

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