Anti-backflow floor drain core and plug

Abstract

The utility model discloses a kind of anti-reverse water floor drain core and insert, comprising: connecting portion and blocking portion, the connecting portion is used to set blocking portion in the drainage passage of floor drain core, the blocking portion is set along the radial of drainage passage, for blocking floor drain core reverse roll-up.The utility model provides a kind of insert of anti-reverse water floor drain core with simple structure and can block elastic floor drain core reverse roll-up and a kind of anti-reverse water floor drain core provided with the insert, with the significant characteristics of low cost, easy to implement.

Description

Technical Field

[0001] This utility model relates to the field of building drainage technology, and more specifically, to an anti-backflow floor drain core and insert. Background Technology

[0002] Residential buildings generally use shared drainage pipe systems. When the pipes become blocked, backflow can occur in ground-floor residents, causing property damage and neighborhood disputes. Existing floor drains are mainly divided into two categories: rigid structures and flexible non-rigid structures.

[0003] Rigid structures (such as check valves in kitchens, magnetic floor drains, or the structures shown in patents 202321256097.3 and 202023090248.1) have the function of preventing backflow, but dirt easily accumulates on the surface, leading to poor sealing and backflow of odors and water. Flexible, non-rigid structures (such as silicone floor drains or the structures shown in patents 201920498659.2 and 201920468260.X), while offering excellent sealing performance, such as... Figure 1 As shown in Figure A, when no water is being drained, the drain outlet of the floor drain core is closed; as... Figure 1 As shown in Figure B, during normal drainage, the drain outlet of the floor drain core is open; as... Figure 1 As shown in Figure C, when the backflow is small, the drain core will be pushed back into the drain while remaining sealed, thus preventing backflow; however, if... Figure 1 As shown in D, when the backflow pressure continues to increase, the drain section will completely flip (i.e., roll back) so that the drain outlet opens in the direction of water inlet, thus completely losing the anti-backflow function and ultimately causing backflow.

[0004] It can be seen that existing anti-odor drain cores cannot effectively prevent backflow. Currently, the most common method to prevent backflow is to install a check valve or overflow drain pipe, or other anti-backflow structures (as shown in patent 202322816296.1). In addition to purchasing additional equipment, this also involves a certain amount of construction work, thus resulting in high implementation costs. Utility Model Content

[0005] This utility model provides a simple-structured plug for an anti-backflow drain core that can prevent the elastic drain core from rolling back, and an anti-backflow drain core equipped with the plug, which has the significant advantages of low cost and easy implementation.

[0006] The utility model description section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0007] An insert for an anti-backflow drain core includes a connecting part and a blocking part. The connecting part is used to place the blocking part inside the drainage channel of the drain core. The blocking part is arranged radially along the drainage channel to prevent the drain core from rolling back.

[0008] Preferably, the blocking part has a mesh structure.

[0009] Preferably, the blocking part has a linear structure.

[0010] Preferably, the blocking portion is U-shaped.

[0011] Preferably, the blocking portion is T-shaped.

[0012] An anti-backflow floor drain core is made of a flexible, non-rigid material and includes a water inlet and a drain outlet. The water inlet has a drainage channel inside, and the drain outlet has a drain port. The drainage channel of the water inlet is connected to the drain outlet of the drain outlet, and the drain outlet always tends to remain closed. The anti-backflow floor drain core insert is installed in the drainage channel of the water inlet.

[0013] Preferably, the connecting part is connected to the inner wall of the drainage channel of the water inlet part.

[0014] Preferably, a water inlet pipe is inserted into the drainage channel of the water inlet, and the connecting part is connected to the water inlet pipe.

[0015] Preferably, it also includes a fixing cap, which consists of a water inlet pipe and a retaining ring. The retaining ring is disposed at the top of the water inlet pipe, which is located in the drainage channel of the water inlet section. The top of the drain core abuts against the bottom of the retaining ring, and the connecting part is connected to the fixing cap.

[0016] The anti-backflow drain core and plug-in of this utility model, other advantages, objectives and features of this utility model will be partly apparent from the following description, and partly understood by those skilled in the art through research and practice of this utility model. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This diagram illustrates the various states of a flexible, non-rigid floor drain. A represents the drain core's drain outlet being closed when no water is being drained; B represents the drain core's drain outlet being open during normal drainage; C represents the drain core being pressed into the drain by reverse water pressure during backflow; and D represents the drain core being rolled back and backflowing.

[0018] Figure 2 This diagram illustrates how the drain plug blocks backflow when backflow occurs. A and C represent the state when the backflowing drain plug is blocked by the plug; B and D represent the state where the drain plug cannot backflow after being blocked, thus preventing the drain outlet from opening.

[0019] Figure 3 The diagram shows two implementations of the anti-backflow drain core and plug-in of this utility model, where A is a drain core with a detachable U-shaped plug-in; and B is a drain core with an integrated T-shaped plug-in.

[0020] Figure 4 This is a cross-sectional structural diagram of two embodiments of the anti-backflow drain core and plug-in described in this utility model, wherein A is a drain core with a detachable U-shaped plug-in; and B is a drain core with an integrated T-shaped plug-in.

[0021] Figure 5 This is a schematic diagram of one embodiment of the anti-backflow floor drain core and plug-in described in this utility model.

[0022] Figure 6 for Figure 5 A schematic diagram showing the U-shaped insert and the fixing cap integrally formed.

[0023] Figure 7 This is a cross-sectional structural diagram of an internal support plug-in, one of the embodiments of the anti-backflow drain core and plug-in of this utility model, where A is the normal state and B is the internal support state.

[0024] Figure 8 This is a schematic diagram of one embodiment of the anti-backflow floor drain core and plug-in described in this utility model.

[0025] Figure 9 for Figure 8 A schematic diagram showing the connection between the detachable U-shaped insert and the retaining cap ring.

[0026] Figure 10 This is a cross-sectional structural diagram of one embodiment of the anti-backflow drain core and plug-in of this utility model.

[0027] Figure 11 for Figure 10 A schematic diagram of the structure in which the detachable T-shaped plug is snapped into the water inlet pipe or fixing cap.

[0028] Figure 12 This is a cross-sectional structural diagram of one embodiment of the anti-backflow drain core and plug-in of this utility model.

[0029] Figure 13 This is a schematic diagram of one embodiment of the anti-backflow drain core of this utility model.

[0030] Figure 14This is a schematic diagram of one embodiment of the anti-backflow drain core of this utility model.

[0031] In the diagram: 1 Connecting part, 11 Clip-on connector, 2 Blocking part, 3 Drain core, 31 Water inlet, 32 Drain, 4 Fixing cap, 41 Water inlet pipe, 42 Clip ring, 5 Screw, 6 Pressure strip, 7 Second hole, 8 Third hole. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0033] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0034] like Figures 1-14 As shown, this utility model provides an insert for an anti-backflow drain core, including: a connecting part 1 and a blocking part 2. The connecting part 1 is used to set the blocking part 2 in the drainage channel of the drain core 3. The blocking part 2 is arranged radially along the drainage channel to prevent the drain core 3 from rolling back.

[0035] The plug-in can be used as an accessory for the anti-backflow drain core, or it can be applied independently to existing drains (just like the development process of this application: when backflow occurred, the applicant happened to see the process and form of the silicone drain core rolling back. At that time, they simply used scrap copper wire to temporarily make a plug-in to try to stop the backflow, and then quickly contacted the property management to unclog the main pipe. Unexpectedly, this plug-in completely blocked the backflow, and its pressure resistance and sealing performance were very good. Afterwards, the applicant specifically conducted a pressure test, and other connection points of the drain pipe were flushed open, but the silicone drain with the plug-in installed still did not backflow. It can be seen that when the plug-in adopts a detachable connection method, it can be directly applied to drains with elastic, non-rigid structures). The way in which the connecting part 1 sets the blocking part 2 in the drainage channel of the drain core 3 can be either a direct connection to the inner wall of the drainage channel or an indirect connection to the inlet pipe 41 (inserted into the drainage channel) or the fixing cap 4. It can be connected by a fixed connection method such as adhesive or welding, or by a detachable connection method such as snap-fit ​​or plug-in.

[0036] In order to prevent the drain core 3 from rolling back, the blocking part 2 is usually set along the radial (i.e. horizontal) direction of the drain core, and at least two ends should be as close as possible to the inner wall of the drainage channel so that the gap between them is as small as possible, so as to prevent the inner wall of the drain core 3 from passing through the gap and rolling back around the blocking part when backflow occurs, which would cause the backflow prevention to fail.

[0037] The blocking part 2 of the plug can be a mesh structure.

[0038] As one of many implementation methods, such as Figure 14 As shown, the blocking part 2 of the plug is a mesh structure, which is integrally fixedly connected to the bottom edge of the fixing cap 4. During assembly, the mesh structure blocking part 2 is inserted into the drainage channel of the drain core along with the fixing cap 4. When backflow occurs, the mesh structure prevents the drain core 3 from rolling back as follows: Figure 2 As shown in A and B in the diagram. Although the mesh structure can reliably prevent the drain core 3 from rolling back, it occupies a large space in the drainage channel, which can easily cause poor drainage.

[0039] Furthermore, such as Figure 13 As shown, the mesh structure blocking part 2 adopts a cross structure and is fixedly connected to the bottom edge of the fixing cap 4 only through 4 endpoints, which can minimize the space occupied by the mesh structure for drainage.

[0040] The blocking part 2 of the plug can also adopt a linear structure to further reduce the impact on normal drainage.

[0041] It should be noted that some linear structural blocking parts 2, if not positioned appropriately, cannot effectively prevent backflow. For example, such as... Figure 12 As shown, the blocking part 2 adopts a straight structure and is fixedly connected to the bottom edge of the fixing cap 4 through two endpoints. When backflow occurs, the inner wall surface of the drain core 3 is supported by the straight blocking part 2 during the backflow process, forming two mutually restraining inner wall elastic curved surfaces. Under the dynamic change of backflow pressure, the pressure difference between the two inner wall elastic curved surfaces also changes dynamically. The inner wall elastic curved surface with less pressure is pulled by the inner wall elastic curved surface opposite the blocking part 2 with greater pressure, attempting to cross the blocking part 2. Since the blocking part 2 is set on the horizontal plane where the bottom edge of the fixing cap 4 is located, the inner wall elastic curved surface will not be subjected to greater backflow pressure during the crossing process, until it successfully crosses and merges with the inner wall elastic curved surface opposite, forming a complete inner wall backflow, thus causing the backflow prevention failure.

[0042] As one of many implementation methods, such as Figure 8 and Figure 9As shown, the connecting part 1 engages the straight-line blocking part 2 with the retaining ring 42 of the fixing cap, and the straight-line structure extends a certain distance beyond the bottom edge of the fixing cap 4. At this time, the blocking part 2 and the extended part of the connecting part 1 form a U-shaped blocking part. During backflow, the inner wall surface of the drain core 3 is supported by the blocking part 2 during the backflow process, forming two mutually restraining elastic curved surfaces of the inner wall surface. Under the dynamic change of backflow pressure difference, when the elastic curved surface of the inner wall surface with less pressure is pulled and attempts to cross the blocking part 2, it must cross the U-shaped protrusion extending beyond the bottom edge of the fixing cap 4 against the backflow pressure, so that the backflow pressure it receives increases until the pressure difference is offset and the crossing stops. Therefore, the U-shaped blocking part 2 can keep the two mutually restraining elastic curved surfaces of the inner wall surface in dynamic balance, and prevent the inner wall surface from rolling back as a whole after a successful crossing, thus effectively preventing backflow. Figure 2 As shown in C and D.

[0043] Preferably, the U-shaped blocking part 2 and the fixing cap 4 are integrally formed, such as... Figure 5 and Figure 6 As shown, this can prevent water backflow failure caused by the user not extending the U-shaped structure beyond the bottom edge of the fixing cap during manual assembly.

[0044] As one of many implementation methods, the blocking portion 2 of the linear structure can be T-shaped, that is, a downwardly extending protrusion is added to the middle of the straight structure, such as... Figure 10 and Figure 11 As shown. When installed as a detachable plug, the T-shaped structure will not cause backflow prevention failure even if it does not extend beyond the bottom edge of the inlet pipe 41.

[0045] It is important to note that when the plug-in and drain core 3 are connected in a fixed manner, they can be manufactured as an integrated anti-backflow drain. When the plug-in and drain core 3 are connected in a detachable manner, the plug-in can be used as a separate accessory on existing drains, or the plug-in and drain core 3 can be manufactured as separate anti-backflow drains, allowing the plug-in and drain core 3 to be produced separately and assembled by the user, greatly improving the compatibility of the plug-in and reducing production costs.

[0046] This utility model also provides an anti-backflow drain core made of a flexible, non-rigid material, including a water inlet 31 and a drain 32. The water inlet 31 has a drainage channel inside, and the drain 32 has a drain outlet. The drainage channel of the water inlet 31 communicates with the drain outlet of the drain 32, and the drain outlet always tends to remain closed. An insert for the anti-backflow drain core provided by this utility model is disposed within the drainage channel of the water inlet 31. The insert for the anti-backflow drain core includes a connecting part 1 and a blocking part 2. The connecting part 1 is used to place the blocking part 2 within the drainage channel. The blocking part 2 is arranged radially along the drainage channel to prevent the drain core from rolling back.

[0047] It should be noted that the way the connecting part 1 sets the blocking part 2 inside the drainage channel can be either a direct connection between the connecting part 1 and the inner wall of the drainage channel, or an indirect connection between the connecting part 1 and the inlet pipe 41 (inserted into the drainage channel) or the fixing cap 4. Fixed connection methods such as adhesive bonding or welding can be used, as well as detachable connection methods such as snap-fit ​​or plug-in. When a fixed connection method is used, it can be made into an integrated anti-backflow floor drain.

[0048] As one of many implementation methods, such as Figure 3 and Figure 4 The anti-backflow drain core shown in Figure A has a detachable connector 1 that snaps onto the inner wall of the inlet 31, allowing the U-shaped blocking part 2 to be directly installed within the drainage channel. It should be noted that during assembly, the user must manually snap the connector in first, then insert the inlet pipe or fixing cap, and avoid inserting it too deeply, which could cause the anti-backflow function to fail.

[0049] Preferred, such as Figure 3 and Figure 4 The integrated anti-backflow drain core shown in Figure B has a connector 1 that is embedded into the inner wall of the inlet 31 during manufacturing using a one-piece molding technique, directly placing the T-shaped blocking part 2 into the drainage channel. During assembly, the user does not need to manually install the connector beforehand; they can simply insert the inlet pipe or fixing cap without worrying about inserting it too deeply and causing the anti-backflow function to fail.

[0050] As one of many implementation methods, such as Figure 10 The anti-backflow floor drain core shown has an inlet pipe 41 inserted into the drainage channel of the inlet part 31. The inner wall of the inlet pipe 41 is provided with two first holes, which are opposite to each other. The detachable plug connection part 1 exists in the form of a snap-fit ​​connector 11. The detachable plug connection part 1 is inserted into the two first holes through the snap-fit ​​connector 11 to achieve connection with the inlet pipe 41, so that the connection part 1 can detachably place the T-shaped blocking part 2 in the drainage channel.

[0051] Furthermore, to allow various sizes of snap-fit ​​connectors 11 to be installed on the water inlet pipe 41, two second holes 7 are provided on the inner wall of the water inlet pipe 41. The two second holes 7 are positioned opposite each other, and the diameter of the second hole 7 is different from the diameter of the first hole. Figure 10 and Figure 11 As shown.

[0052] Furthermore, two third holes 8 are provided on the inner wall of the water inlet pipe 41. The two third holes 8 are positioned opposite each other, and the diameter of the third holes 8 is different from the diameter of the second hole 7 and the first hole, such as... Figure 10 and Figure 11 As shown. By setting multiple holes with different diameters, the versatility of the water inlet pipe 41 can be increased.

[0053] Furthermore, to prevent the snap-fit ​​connector 11 from rotating after being inserted into the first hole (or the second hole 7, or the third hole 8), which would cause the anti-reverse flow failure, the first hole, the second hole 7, and the third hole 8 can be square holes, and the snap-fit ​​connector 11 has a square structure that adapts to the holes to increase the stability of the plug.

[0054] Furthermore, if the inlet pipe 41 is an existing structure, such as the drain pipe of a washing machine, the first hole for installation can be directly burned into the existing structure.

[0055] The anti-backflow drain core may also include a fixing cap 4, which consists of a water inlet pipe 41 and a retaining ring 42. The retaining ring 42 is located at the top of the water inlet pipe 41, which is located in the drainage channel of the water inlet part 31. The top of the drain core 3 abuts against the bottom of the retaining ring 42. The blocking part 2 is connected to the inner wall of the water inlet pipe 41 through the connecting part 1, or connected to the retaining ring 42.

[0056] Through the above structural design, the plug-in can be installed inside the drain core 3 using the fixing cap 4. When the plug-in is used alone in an existing drain, the connecting part 1 can be connected to the fixing cap 4. The connection between the connecting part 1 and the fixing cap 4 can be a fixed connection (such as adhesive, welding, etc.) or a detachable connection (such as snap-fit, plug-in, etc.). This eliminates the need to operate on the existing drain core 3 during plug-in installation (for example, when using adhesive, the drain core 3 needs to be removed and cleaned to avoid impurities affecting the adhesive effect; or when using snap-fit, the user needs to insert their fingers into the drain channel of the drain core 3 for snap-fit ​​operation). The connecting part 1 can be directly connected to the fixing cap 4, and then the fixing cap 4 can be inserted into the drain channel of the drain core 3. The fixing cap 4 can be an existing structure connected to the drain or drain pipe (such as the drain pipe of a washing machine or the drain pipe of a kitchen), or it can be an accessory that comes with the anti-backflow drain core.

[0057] As one of many implementation methods, such as Figure 5 The anti-backflow drain core shown has an insert (the blocking part 2 is a U-shaped structure) that is indirectly installed in the drainage channel by being integrally formed with the inlet pipe 41 of the fixing cap 4. During assembly, the user needs to manually snap the fixing cap 4 onto the inner wall of the drain core 3. It should be noted that when backflow occurs, the backflow pressure may push the blocking part 2 and the fixing cap 4 out of the drainage channel, causing the anti-backflow function to fail.

[0058] Furthermore, the length of the inlet pipe 41 is appropriately increased so that the fixing cap 4 can press against the drain cover upwards, preventing it from being completely pushed out of the drainage channel when backflow occurs.

[0059] As one of many implementations, the connecting part 1 and the blocking part 2 are connected by a screw 5. Both ends of the connecting part 1 are connected to the inner wall of the water inlet pipe 41 (usually by welding or bonding). The screw 5 passes through the connecting part 1 and is movably connected to the blocking part 2. An elastic pressure strip 6 is provided between the connecting part 1 and the blocking part 2. Both the blocking part 2 and the pressure strip 6 are located outside the fixing cap 4 and extend into the drainage channel. Figure 7 As shown in Figure A, the screw 5 is connected to the connecting part 1 via a bushing and is threadedly connected to the blocking part 2. When the screw 5 is rotated, the blocking part 2 will rotate slightly with the screw and drive the pressure strip 6 to rotate slightly, thus giving the pressure strip 6 torque. Then, as the screw 5 continues to rotate, under the torque of the pressure strip 6, the blocking part 2 stops rotating and moves upward along the screw 5, compressing the pressure strip 6. As the pressure strip 6 is compressed and deformed, it will gradually squeeze the drainage channel, so that the plug can support the drain core 3 from inside, thereby increasing the friction between the drain core 3 and the drain pipe and preventing the drain core 3 from being pushed out of the drain pipe as a whole when backflow occurs.

[0060] It should be noted that the internal support insert allows the drain core 3 to withstand higher backflow pressure, preventing the drain core 3 from detaching and causing backflow. Even without the fixing cap 4, the insert still achieves the internal support effect, but the connecting part 1 must be manually secured to the drain core 3 during installation. Therefore, the implementation without the fixing cap 4 is still within the scope of protection of this application.

[0061] As one of many implementation methods, such as Figure 10 The anti-backflow drain core shown has a detachable connector 1 that connects to the inlet pipe 41 of the fixing cap 4 via a snap-fit ​​connector 11. The specific connection method is exactly the same as the previously described connection method to the inlet pipe 41. Figure 10 and Figure 11 As shown.

[0062] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "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 are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0063] In this utility model, unless otherwise explicitly 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, an electrical connection, or a connection that allows communication between them; 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 explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0064] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A plug for an anti-backflow floor drain core, characterized in that, include: The connecting part (1) and the blocking part (2) are provided. The connecting part (1) is used to place the blocking part (2) in the drainage channel of the drain core (3). The blocking part (2) is arranged radially along the drainage channel to prevent the drain core (3) from rolling back.

2. An insert for a non-slip drain core according to claim 1, wherein, The blocking part (2) has a mesh structure.

3. The insert for the anti-backflow floor drain core according to claim 1, characterized in that, The blocking part (2) has a linear structure.

4. The insert for the anti-backflow floor drain core according to claim 3, characterized in that, The blocking part (2) is U-shaped.

5. The insert for the anti-backflow drain core according to claim 3, characterized in that, The blocking part (2) is T-shaped.

6. A backflow prevention drain core, made of a flexible, non-rigid material, comprising a water inlet (31) and a drain (32), wherein the water inlet (31) has a drainage channel inside, and the drain (32) has a drain outlet, wherein the drainage channel of the water inlet (31) is connected to the drain outlet of the drain (32), and the drain outlet always tends to remain closed, characterized in that, The drain channel of the water inlet (31) is provided with a plug for the anti-backflow floor drain core as described in any one of claims 1-5.

7. The anti-backflow drain core according to claim 6, characterized in that, The connecting part (1) is connected to the inner wall of the drainage channel of the water inlet part (31).

8. The anti-backflow drain core according to claim 6, characterized in that, A water inlet pipe (41) is inserted into the drainage channel of the water inlet (31), and the connecting part (1) is connected to the water inlet pipe (41).

9. The anti-backflow drain core according to claim 6, characterized in that, It also includes a fixing cap (4), which is composed of a water inlet pipe (41) and a retaining ring (42). The retaining ring (42) is located at the top of the water inlet pipe (41). The water inlet pipe (41) is located in the drainage channel of the water inlet part (31). The top of the drain core (3) abuts against the bottom of the retaining ring (42). The connecting part (1) is connected to the fixing cap (4).

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