A return-preventing floor drain

Abstract

The utility model belongs to floor drain technical field. It solves the problem of easy back smell of prior art floor drain. Provide a kind of floor drain of anti-overflow, the inside of floor drain body has the water storage warehouse of U shape, the lower end of floor drain core enters the inside of water storage warehouse, the inside of floor drain core has installation card seat and is provided with the deodorization film of umbrella shape and can occur elastic deformation, the outer peripheral wall of deodorization film can be adhered to the inside wall of floor drain core to close the open mouth of floor drain body, and under the impact of liquid flow, the outer peripheral wall of deodorization film can be adhered to floor drain core, annular water passage is formed between water storage warehouse and the inside wall of floor drain body, the side wall of floor drain body still has water inlet pipe and water outlet pipe respectively with water passage communication, the height of water outlet pipe is lower than the height of water inlet pipe, the inner bottom wall of water inlet pipe and the mouth of water storage warehouse have height gradually rising guide slope. The utility model has the advantages of improving the anti-overflow and deodorization effect of floor drain.

Description

Technical Field

[0001] This utility model belongs to the field of floor drain technology and relates to a floor drain that prevents backflow. Background Technology

[0002] A floor drain is a drainage device that connects the floor to the drainage pipe system. As an important component of the drainage system in a residence, the performance of the floor drain directly affects the indoor air quality. For example, Chinese patent literature discloses an odor-proof floor drain (application number: 201020276391.7), which includes a cylindrical sleeve and a panel located on the upper part of the sleeve. The side wall of the sleeve has a water outlet, and a straight drain pipe is provided inside the sleeve. The upper part of the straight drain pipe is detachably and sealed to the inner wall of the sleeve. There is a liquid passage between the straight drain pipe and the sleeve that communicates with the water outlet. A sealing structure is provided between the sleeve and the panel.

[0003] The odor-proof floor drain has the following shortcomings in use: By sealing the lower end of the sleeve, a water seal is formed at the lower end of the sleeve when sewage flows through it, thus preventing odors from the drain pipe from entering the room. However, in dry seasons or when the drain is unused for a long time, the water seal fails after the water in the sleeve evaporates, causing backflow of odors, polluting the indoor air and affecting the indoor environment. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an anti-backflow floor drain. The technical problem this invention aims to solve is how to improve the anti-backflow and anti-odor effects of floor drains.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] An anti-backflow floor drain includes a cylindrical drain body with an open upper end and a closed lower end. A cylindrical drain core is vertically arranged inside the drain body. The drain body has a U-shaped water storage chamber inside, with the lower end of the drain core extending into the water storage chamber. The drain core has a mounting bracket and an umbrella-shaped, elastically deformable odor-proof membrane inside. The top of the odor-proof membrane has a fixing buckle connected to the mounting bracket. The outer peripheral wall of the odor-proof membrane can adhere to the inner side wall of the drain core to seal the opening of the drain body, and under the impact of liquid flow, the outer peripheral wall of the odor-proof membrane can detach from the drain core. An annular water passage is formed between the water storage tank and the inner side wall of the drain body. The side wall of the drain body also has an inlet pipe and an outlet pipe that are respectively connected to the water passage. The height of the outlet pipe is lower than the height of the inlet pipe. There is a gradually rising guide slope between the inner bottom wall of the inlet pipe and the opening edge of the water storage tank.

[0007] This anti-backflow floor drain features an umbrella-shaped, elastically deformable odor-proof membrane inside the drain core. The outer periphery of this membrane adheres to the inner wall of the drain core, sealing the drain's opening and reducing liquid evaporation while effectively preventing the overflow of insects and odors, thus providing a degree of anti-backflow and anti-odor protection. Furthermore, an inlet pipe allows for water replenishment to the storage tank even when the drain's opening has been dry for an extended period, ensuring a water seal and anti-backflow effect. Additionally, a guide slope between the inner bottom wall of the inlet pipe and the storage tank, coupled with a lower outlet pipe, guides water flow from the inlet pipe (or the drain's opening) to the storage tank, and then from the storage tank through a water channel to the outlet pipe, ensuring smooth drainage and enhancing the drain's anti-backflow and anti-odor properties.

[0008] In the aforementioned anti-backflow floor drain, the inlet pipe and outlet pipe are arranged opposite to each other, and baffles are provided on both sides of the guide slope. The distance between the two baffles is greater than or equal to the inner diameter of the inlet pipe, and the height of the baffles is greater than or equal to the height of the water storage tank opening. Furthermore, by arranging the inlet and outlet pipes opposite to each other and providing baffles on both sides of the guide slope, the water flow can be better guided from the inlet pipe to the water storage tank and then from the water storage tank through the water channel to the outlet pipe, further ensuring the drainage direction and smoothness, thereby improving the anti-backflow and anti-odor effects of the floor drain.

[0009] In the aforementioned anti-backflow floor drain, the outer wall of the odor-proof membrane has several annular ribs spaced from top to bottom. The width of these annular ribs gradually increases from top to bottom, and they can simultaneously abut against the inner wall of the drain core. The combination of the fixing clips and the mounting brackets facilitates the installation and removal of the odor-proof membrane. The annular ribs, on the one hand, provide an odor-proof effect by abutting against the inner wall of the drain core; on the other hand, under the impact of liquid flow, the odor-proof membrane can better detach from and adhere to the drain core, facilitating drainage and thus achieving both odor prevention and drainage.

[0010] In the aforementioned anti-backflow floor drain, the bottom edge of the odor-proof membrane is corrugated or serrated. The corrugated or serrated bottom edge of the odor-proof membrane facilitates better adhesion between the membrane and the inner wall of the drain core, effectively preventing the overflow of insects, odors, etc.

[0011] In the aforementioned anti-backflow floor drain, the drain body has an annular step at its open end, with a notch on the annular step. The drain core has a flange at its top, and a limiting block on its outer side wall. The length of the limiting block is less than or equal to the length of the notch. The flange abuts against the annular step vertically, and the limiting block is located below the annular step. A sealing ring is provided between the flange and the annular step. In use, first align the limiting block of the drain core with the notch of the annular step. After the limiting block passes the notch, rotate the drain core so that the limiting block on the drain core is misaligned with the notch and located below the annular step, thus providing a limiting function. To disassemble or assemble the drain core, simply reverse the operation. The sealing ring enhances the odor-proof effect at the connection between the drain core and the drain body.

[0012] In the aforementioned anti-backflow floor drain, a vertical riser is vertically installed at the open end of the drain body. The lower end of the riser rests against the annular step, and the flange is located inside the riser. Depending on actual usage needs, the riser can be added to facilitate the connection between this anti-backflow floor drain and drainage facilities. When the riser is not needed, it can be removed and a drain cover installed.

[0013] Compared with existing technologies, the advantages of this anti-backflow floor drain are as follows: An umbrella-shaped, elastically deformable anti-odor membrane is installed inside the drain core. The outer periphery of the membrane adheres to the inner wall of the drain core, sealing the open opening of the drain body, reducing liquid evaporation, and effectively preventing the overflow of insects and odors, thus achieving a certain degree of anti-backflow and anti-odor effect. Simultaneously, by installing an inlet pipe, even if the open opening of the drain body has not received water for a long time, water can be added to the storage tank via the inlet pipe (connected to other drainage facilities on the same floor), ensuring the water seal anti-backflow effect. Furthermore, by setting a guide slope between the inner bottom wall of the inlet pipe and the storage tank, and with the outlet pipe being lower than the inlet pipe, water flow is guided from the inlet pipe (or the open opening of the drain body) to the storage tank, and then from the storage tank through the water channel to the outlet pipe, ensuring drainage direction and smooth drainage, thereby improving the anti-backflow and anti-odor effect of the floor drain. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the anti-backflow floor drain.

[0015] Figure 2 This is one of the cross-sectional views of this anti-backflow floor drain.

[0016] Figure 3 This is the second cross-sectional view of this anti-backflow floor drain.

[0017] Figure 4 This is an exploded view of the anti-backflow floor drain.

[0018] In the diagram, 1. Drain body; 1a. Opening; 1b. Water storage tank; 1c. Inlet pipe; 1d. Outlet pipe; 1e. Guide slope; 1f. Baffle; 1g. Circular step; 1g1. Notch; 2. Drain core; 2a. Mounting bracket; 2b. Flanged edge; 2c. Limiting block; 3. Odor-proof membrane; 3a. Fixing buckle; 3b. Circular rib; 4. Water passage; 5. Sealing ring; 6. Increasing pipe. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] A type of floor drain designed to prevent backflow, as shown in the reference. Figure 1-4 The drain includes a cylindrical drain body 1, with an open opening 1a at the upper end and a closed opening at the lower end. A cylindrical drain core 2 is vertically arranged inside the drain body 1. The drain body 1 has a U-shaped water storage chamber 1b inside, with the lower end of the drain core 2 extending into the water storage chamber 1b. The drain core 2 has a mounting bracket 2a inside and an umbrella-shaped, elastically deformable odor-proof membrane 3. The top of the odor-proof membrane 3 has a fixing buckle 3a, which is connected to the mounting bracket 2a. The outer surface of the odor-proof membrane 3... The peripheral wall can abut against the inner side wall of the drain core 2 to seal the opening 1a of the drain body 1, and under the impact of the liquid flow, the outer peripheral wall of the odor-proof membrane 3 can detach from the drain core 2. An annular water passage 4 is formed between the water storage tank 1b and the inner side wall of the drain body 1. The side wall of the drain body 1 also has an inlet pipe 1c and an outlet pipe 1d that are respectively connected to the water passage 4. The height of the outlet pipe 1d is lower than the height of the inlet pipe 1c. There is a gradually rising guide slope 1e between the inner bottom wall of the inlet pipe 1c and the opening edge of the water storage tank 1b.

[0021] Reference Figure 3 Furthermore, the inlet pipe 1c and the outlet pipe 1d are arranged opposite to each other, and both sides of the guide ramp 1e have baffles 1f. The distance between the two baffles 1f is greater than or equal to the inner diameter of the inlet pipe 1c, and the height of the baffles 1f is greater than or equal to the height of the opening edge of the water storage tank 1b.

[0022] Reference Figure 2 and Figure 4 Specifically, the bottom edge of the odor-proof membrane 3 is corrugated or sawtooth-shaped, and the outer wall of the odor-proof membrane 3 has a number of annular ribs 3b spaced from top to bottom. The width of the annular ribs 3b gradually increases from top to bottom, and the annular ribs 3b can simultaneously abut against the inner wall of the drain core 2.

[0023] Reference Figure 2 and Figure 4 More specifically, the drain body 1 has an annular step 1g at its open opening 1a, and a notch 1g1 on the annular step 1g. The drain core 2 has a flange 2b at its top, and a limiting block 2c on its outer side wall. The length of the limiting block 2c is less than or equal to the length of the notch 1g1. The flange 2b and the annular step 1g are abutted against each other vertically. The limiting block 2c is located below the annular step 1g, and a sealing ring 5 is provided between the flange 2b and the annular step 1g.

[0024] Reference Figure 2 and Figure 4 More specifically, a riser 6 is vertically installed at the opening 1a of the drain body 1, the lower end of the riser 6 abuts against the annular step 1g, and the flange 2b is located inside the riser 6.

[0025] This anti-backflow floor drain features an umbrella-shaped, elastically deformable odor-proof membrane 3 inside the drain core 2. The outer periphery of the membrane 3 adheres to the inner wall of the drain core 2, thus sealing the open opening 1a of the drain body 1. This reduces liquid evaporation and effectively prevents the overflow of insects and odors, providing a certain degree of anti-backflow and anti-odor effects. Simultaneously, by incorporating a water inlet pipe 1c, even if the open opening 1a of the drain body 1 remains dry for an extended period, the water inlet pipe 1c can be connected to other drainage facilities on the same floor to replenish the water storage tank 1b, ensuring adequate water supply. To further enhance the anti-backflow and anti-odor effect, a guide ramp 1e is installed between the inner bottom wall of the inlet pipe 1c and the water storage tank 1b. In addition, the height of the outlet pipe 1d is lower than the height of the inlet pipe 1c. The inlet pipe 1c and the outlet pipe 1d are arranged opposite each other. Both sides of the guide ramp 1e have baffles 1f, which can guide the water flow from the inlet pipe 1c (or the open opening 1a of the drain body 1) to the water storage tank 1b and then from the water storage tank 1b through the water channel 4 to the outlet pipe 1d, ensuring the drainage direction and smooth drainage, thereby improving the anti-backflow and anti-odor effect of the drain.

[0026] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A backflow-proof floor drain, comprising a cylindrical floor drain body (1), the upper end of the floor drain body (1) having an open opening (1a) and the lower end being closed, and a cylindrical floor drain core (2) vertically arranged inside the floor drain body (1), characterized in that, The drain body (1) has a U-shaped water storage tank (1b) inside. The lower end of the drain core (2) extends into the water storage tank (1b). The drain core (2) has a mounting bracket (2a) and an umbrella-shaped odor-proof membrane (3) that can elastically deform. The top of the odor-proof membrane (3) has a fixing buckle (3a) which is connected to the mounting bracket (2a). The outer peripheral wall of the odor-proof membrane (3) can abut against the inner side wall of the drain core (2) to close the opening (1a) of the drain body (1). Under the impact of the liquid flow, the outer peripheral wall of the odor-proof membrane (3) can detach from and adhere to the drain core (2). An annular water passage (4) is formed between the water storage tank (1b) and the inner side wall of the drain body (1). The side wall of the drain body (1) also has an inlet pipe (1c) and an outlet pipe (1d) that are respectively connected to the water passage (4). The height of the outlet pipe (1d) is lower than the height of the inlet pipe (1c). There is a gradually rising guide slope (1e) between the inner bottom wall of the inlet pipe (1c) and the opening edge of the water storage tank (1b).

2. The anti-backflow floor drain according to claim 1, characterized in that, The inlet pipe (1c) and outlet pipe (1d) are arranged opposite to each other. Both sides of the guide ramp (1e) have baffles (1f). The distance between the two baffles (1f) is greater than or equal to the inner diameter of the inlet pipe (1c). The height of the baffles (1f) is greater than or equal to the height of the opening edge of the water storage tank (1b).

3. A backflow-prevention floor drain according to claim 1 or 2, characterized in that, The outer wall of the odor-proof membrane (3) has a number of annular ribs (3b) spaced from top to bottom. The width of the annular ribs (3b) gradually increases from top to bottom, and the annular ribs (3b) can simultaneously abut against the inner wall of the drain core (2).

4. A backflow-prevention floor drain according to claim 3, characterized in that, The bottom edge of the odor-proof film (3) is corrugated or serrated.

5. A backflow-prevention floor drain according to claim 1 or 2, characterized in that, The drain body (1) has an annular step (1g) at its open opening (1a), and a notch (1g1) on the annular step (1g). The drain core (2) has a flange (2b) at its top, and a limiting block (2c) on the outer side wall of the drain core (2). The length of the limiting block (2c) is less than or equal to the length of the notch (1g1). The flange (2b) and the annular step (1g) are abutted against each other vertically. The limiting block (2c) is located below the annular step (1g), and a sealing ring (5) is provided between the flange (2b) and the annular step (1g).

6. A backflow-prevention floor drain according to claim 5, characterized in that, A vertical riser (6) is also provided at the opening (1a) of the drain body (1). The lower end of the riser (6) abuts against the annular step (1g), and the flange (2b) is located inside the riser (6).

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