Domestic drainpipe
By installing shut-off components on the drain pipes and using chemical cleaning agents, the problem of short contact time between the cleaning agent and grease is solved, achieving more efficient cleaning and preventing blockages.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- CHEN LEIZHEN
- Filing Date
- 2025-12-16
- Publication Date
- 2026-07-23
AI Technical Summary
In existing technologies, chemical cleaning agents have short contact time with grease, resulting in limited cleaning effects, and waste discharged directly into public pipes can easily form difficult-to-remove blockages.
Install a shut-off device, such as a shut-off valve or plug, at the end of the sewer pipe closest to the public pipe to shut off the sewer pipe. Then use a chemical cleaning agent to increase the contact time between the cleaning agent and the grease, and filter the waste after chemical cleaning through a filter.
It increases the contact time between the cleaning agent and grease, enhances the cleaning effect, prevents waste from mixing with grease and forming blockages, and improves the cleaning efficiency of sewer pipes.
Smart Images
Figure CN2025142788_23072026_PF_FP_ABST
Abstract
Description
A type of domestic sewage pipe Technical Field
[0001] This utility model belongs to the field of drainage pipes, specifically a domestic drainage pipe. Background Technology
[0002] Currently, sewer systems worldwide face a serious problem of grease and waste buildup, which often forms stubborn, difficult-to-remove clumps called "fatbergs." Furthermore, grease is rich in hydrocarbons, and its decomposition in the relatively closed, anaerobic environment of urban sewage networks produces large amounts of methane, increasing the risk of biogas accumulation. Existing technologies using chemical cleaning methods to clean household and commercial sink drains typically involve injecting chemical cleaning agents into the pipes, relying on the reaction between the agent and grease to dissolve the dirt. However, due to pipe design flaws, the cleaning agent often fails to make sufficient contact with the grease, and most of it is directly discharged, resulting in limited cleaning effectiveness. Utility Model Content
[0003] The purpose of this utility model is to provide a domestic sewage pipe that, through a shut-off component, allows the end of the sewage pipe closest to the public pipe to be shut off before the application of chemical cleaning agents. This solves the problem in existing technologies where the cleaning agent has a short contact time with grease, resulting in insufficient contact between the cleaning agent and grease and thus limited cleaning effectiveness.
[0004] The technical solution of this utility model is as follows: a domestic sewage pipe includes a sewage pipe and a shut-off component.
[0005] The shut-off component includes: a shut-off valve.
[0006] One end of the drain pipe is used to connect to the water tank, and the shut-off valve is installed at the other end of the drain pipe.
[0007] The shut-off valve is used in conjunction with a public pipeline to shut off the end of the sewer pipe that is close to the public pipeline.
[0008] In a further embodiment, the shut-off component further includes a filter element, which is detachably installed at the end of the shut-off valve away from the drain pipe. The filter element can filter the waste treated by chemical cleaning agent during drainage, solving the problem that the waste will still mix with grease and form difficult-to-remove blockages when directly discharged into the public pipe.
[0009] In a further embodiment, the filter element and the shut-off valve are connected by threads, snap-fit, or flanges.
[0010] In a further embodiment, the stopper further includes a first annular fastener.
[0011] The filter element is inserted into or sleeved on the shut-off valve, and the first annular fastener is sleeved on the shut-off valve or the filter element.
[0012] The first annular fastener is used to apply force to the mating part of the filter element and the drain pipe, so as to connect the filter element and the drain pipe.
[0013] In another embodiment, a domestic sewage pipe includes a sewage pipe and a shut-off component.
[0014] The stopper includes a block.
[0015] One end of the drain pipe is used to connect to the water tank, and the other end is used to connect to the public pipeline.
[0016] The plug can be detachably installed in the drain pipe.
[0017] When using a plug to connect the end of the drain pipe close to the public pipe, the plug will stop the drain pipe at that end.
[0018] In a further embodiment, the drain pipe and the plug are connected by a thread, a snap-fit, or a flange.
[0019] In a further embodiment, the stopper further includes a second annular fastener.
[0020] The plug is inserted into or fitted onto the drain pipe, and the second annular fastener is fitted onto the drain pipe or the plug.
[0021] The second ring fastener is used to apply force to the mating part of the block and the drain pipe, so that the block and the drain pipe are connected.
[0022] In a further embodiment, the domestic sewage pipe also includes a connector.
[0023] The connector is used to connect the drain pipe and the plug.
[0024] When the block is separated from the sewer pipe, the block is connected to the sewer pipe through a connector. The connector allows the block to be placed on one side of the sewer pipe when the sewer is not shut off, reducing the probability of not being able to find the block when it is needed.
[0025] In a further embodiment, the drain pipe is a flexible pipe used to connect to the outlet of the pool or a rigid pipe.
[0026] In a further embodiment, the drain pipe is a rigid pipe used to connect to the flexible pipe of the pool.
[0027] The beneficial effects of this utility model are: by installing a stopper at one end of the drain pipe connected to the public pipe, the drain pipe can be stopped at the end closest to the public pipe before the chemical cleaning agent is used. This increases the residence time of the chemical cleaning agent in the drain pipe, allowing the cleaning agent to fully contact the grease, thus improving the cleaning effect. This solves the problem of the existing technology where the cleaning agent has a short contact time with the grease, resulting in limited cleaning effect. Attached Figure Description
[0028] Figure 1 is a schematic diagram of an embodiment of the drainage pipe, shut-off valve and filter of this utility model.
[0029] Figure 2 is a schematic diagram of an embodiment of the drainage pipe, plug, and connector of this utility model.
[0030] Figure 3 is a schematic diagram of another embodiment of the drainage pipe, plug, and connector of this utility model.
[0031] Figure 4 is a schematic diagram of an embodiment of the present invention in which the drain pipe is provided with an internal thread and the plug is provided with an external thread, so that the drain pipe and the plug are threadedly connected.
[0032] Figure 5 is a schematic diagram of an embodiment of the present invention in which the drain pipe is provided with external threads and the plug is provided with internal threads, so that the drain pipe and the plug are threadedly connected.
[0033] Figure 6 is a schematic diagram of an embodiment of the drainage pipe, the second annular fastener, and the plug of this utility model.
[0034] The attached diagram is labeled as follows: 1. Drain pipe; 21. Shut-off valve; 22. Block; 23. Second ring fastener; 3. Filter element; 4. Connector. Detailed Implementation
[0035] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.
[0036] This application discloses a domestic sewer pipe that, through a shut-off component, allows the end of the sewer pipe connected to the public pipe to be shut off before the use of chemical cleaning agents. This solves the problem in the prior art where the cleaning agent has a short contact time with grease, resulting in insufficient contact between the cleaning agent and grease and thus limited cleaning effect.
[0037] The domestic sewage pipe 1 includes: sewage pipe 1 and shut-off fitting.
[0038] One end of the drain pipe 1 is used to connect to the water tank, and the shut-off component is installed at the end of the drain pipe 1 that matches the public pipe.
[0039] The drain pipe 1 can be a flexible pipe, which is used to connect to the water outlet of the pool or a rigid pipe. The flexible drain pipe 1 can be a corrugated hose or a flexible smooth pipe as shown in Figure 1-6.
[0040] Alternatively, the drain pipe 1 can be a rigid pipe, which is used to connect the flexible pipe to the water tank. The rigid drain pipe 1 can be made of PVC material or metal.
[0041] The above connection method can be achieved by making the main body of the drain pipe 1 a flexible pipe and the ends a rigid pipe, or by making the main body of the drain pipe 1 a rigid pipe and the ends a flexible pipe.
[0042] In the first embodiment, as shown in FIG1, the shut-off component includes: shut-off valve 21.
[0043] One end of the drain pipe 1 is used to connect to the water tank, and the shut-off valve 21 is installed at the other end of the drain pipe 1.
[0044] The shut-off valve 21 is used in conjunction with a public pipeline to shut off the end of the sewer pipe 1 that is close to the public pipeline.
[0045] The shut-off valve 21 is either a manual shut-off valve 21 or an electric shut-off valve 21 as shown in Figure 1. When the shut-off valve 21 is an electric shut-off valve 21, it can remotely control the shut-off or opening of the drain pipe 1. The drain pipe 1 can be an integral structure with the valve, or the valve can be installed on the drain pipe 1 through a flange structure or a threaded structure. Alternatively, one end of the shut-off valve 21 can be inserted into the drain pipe 1 and connected to the drain pipe 1 through a ring nut or clamp, or the shut-off valve 21 and the drain pipe 1 can be threaded together.
[0046] Operating method: When it is not necessary to clean the drain pipe 1, insert the shut-off valve 21 into the common pipe to make the shut-off valve 21 open, so that the water tank, drain pipe 1 and common pipe are connected.
[0047] When it is necessary to clean the drain pipe 1, use the shut-off valve 21 to shut off the drain pipe 1, and then pour in the cleaning agent to increase the contact time between the cleaning agent and the grease. This allows the drain pipe 1 to be controlled to be shut off or open without having to pull it out of the public pipe before using the cleaning agent.
[0048] The second embodiment adds a filter element 3 based on the first embodiment.
[0049] The filter element 3 is detachably installed at the end of the shut-off valve 21 away from the drain pipe 1.
[0050] The filter element 3 can be a flexible filter bag, a rigid filter screen, or a mesh end cap located at the end of the shut-off valve 21.
[0051] Regarding the connection between filter element 3 and gate valve 21, filter element 3 and gate valve 21 can be connected by thread, snap-fit, or flange.
[0052] When the filter element 3 and the shut-off valve 21 are threaded together, the shut-off valve 21 can be provided with an internal thread and the filter element 3 with an external thread, so that the inner diameter of the shut-off valve 21 and the outer diameter of the filter element 3 match, thus connecting the shut-off valve 21 and the filter element 3. Alternatively, the shut-off valve 21 can be provided with an external thread and the filter element 3 with an internal thread, so that the outer diameter of the shut-off valve 21 and the inner diameter of the filter element 3 match, thus connecting the shut-off valve 21 and the filter element 3.
[0053] The filter element 3 and the shut-off valve 21 can be connected by a male and female snap-fit structure or a hinge snap-fit structure.
[0054] Regarding the connection between the filter element 3 and the shut-off valve 21, a first annular fastener can also be added. The filter element 3 is inserted into or sleeved on the shut-off valve 21, and the first annular fastener is sleeved on the shut-off valve 21 or the filter element 3.
[0055] The first annular fastener is used to apply force to the mating part of the filter element 3 and the drain pipe 1 to connect the filter element 3 and the drain pipe 1. The first annular fastener can be a clamp or an annular nut for connecting pipe fittings.
[0056] Working method: After the cleaning agent reacts with the grease for a certain period of time, open the shut-off valve 21 to connect the drain pipe 1 with the public pipe. After the liquid in the drain pipe 1 is discharged, pull the end of the shut-off valve 21 with the filter element 3 out of the public pipe, and then replace the filter element 3 or remove the waste from the filter element 3 after chemical cleaning agent treatment.
[0057] The third embodiment, as shown in Figures 2-6, includes a stopper block 22.
[0058] One end of the drain pipe 1 is used to connect to the water tank, and the other end is used to connect to the public pipeline.
[0059] The block 22 is detachably installed on the drain pipe 1.
[0060] When using the plug 22 to connect the end of the drain pipe 1 that is close to the public pipe, the plug 22 will cut off the end of the drain pipe 1 that is close to the public pipe.
[0061] Regarding the connection between the drain pipe 1 and the plug 22, the drain pipe 1 and the plug 22 can be connected by threads, snap-fit, or flanges.
[0062] When the drain pipe 1 and the plug 22 are threaded together, as shown in Figure 4, the plug 22 can be a stepped cylindrical structure, with the drain pipe 1 having an internal thread and the plug 22 having an external thread. This allows the inner diameter of the drain pipe 1 to match the partial outer diameter of the plug 22, enabling a detachable connection between the drain pipe 1 and the plug 22. Alternatively, as shown in Figure 5, the plug 22 can be a round cap structure, with the drain pipe 1 having an external thread and the plug 22 having an internal thread. This allows the outer diameter of the drain pipe 1 to match the inner diameter of the plug 22, enabling a detachable connection between the drain pipe 1 and the plug 22.
[0063] The connection between the drain pipe 1 and the plug 22 can be either a male-female snap-fit structure or a hinge snap-fit structure.
[0064] Regarding the connection between the drain pipe 1 and the plug 22, the stop component may also include: a second annular fastener 23.
[0065] The plug 22 is inserted into or fitted onto the drain pipe 1, and the second annular fastener 23 is fitted onto the drain pipe 1 or the plug 22.
[0066] As shown in Figure 6, the second annular fastener 23 is used to apply force to the mating part of the block 22 and the drain pipe 1, so that the block 22 and the drain pipe 1 are connected. The second annular fastener 23 can be a clamp or an annular nut for connecting pipe fittings.
[0067] Working method: When it is not necessary to clean the drain pipe 1, separate the drain pipe 1 from the block 22, insert the drain pipe 1 into the public pipe, and connect the water tank, drain pipe 1 and public pipe.
[0068] When it is necessary to clean the drain pipe 1, pull the drain pipe 1 out of the public pipe, install the plug 22 into the drain pipe 1 to shut off the drain pipe 1, then pour in the cleaning agent to allow the cleaning agent and grease to react. After the cleaning agent and grease have reacted for a certain period of time, separate the plug 22 from the drain pipe 1, and then reinsert the drain pipe 1 into the public pipe to connect the sink, drain pipe 1 and the public pipe.
[0069] The fourth embodiment adds a connector 4 to the third embodiment.
[0070] Connector 4 is used to connect drain pipe 1 and plug 22.
[0071] When the block 22 is separated from the drain pipe 1, the block 22 is connected to the drain pipe 1 through the connector 4.
[0072] The connector 4 can be a flexible strip structure that is directly connected to the drain pipe 1 as shown in Figure 2, or a flexible strip structure that is fitted onto the drain pipe 1 through a collar as shown in Figure 3, or a hinge structure that allows the block 22 to be flipped from the end of the drain pipe 1 to one side of the drain pipe 1.
[0073] Working method: When it is not necessary to clean the drain pipe 1, separate the drain pipe 1 and the block 22, insert the drain pipe 1 into the public pipe, and connect the water tank, drain pipe 1 and public pipe. At this time, the block 22 is set on one side of the drain pipe 1 through the connector 4.
[0074] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims
1. A domestic sewage pipe, characterized in that, include: Drainage pipes and shut-off fittings; The shut-off component includes: a shut-off valve; One end of the drain pipe is used to connect to the water tank, and the shut-off valve is installed at the other end of the drain pipe; The shut-off valve is used in conjunction with a public pipeline to shut off the end of the sewer pipe that is close to the public pipeline.
2. A domestic sewage pipe according to claim 1, characterized in that, The shut-off component also includes a filter element, which is detachably installed at the end of the shut-off valve away from the drain pipe.
3. A domestic sewage pipe according to claim 2, characterized in that, The filter element and the shut-off valve are connected by threads, snap-fit, or flanges.
4. A domestic sewage pipe according to claim 2, characterized in that, The stopper also includes: a first annular fastener; The filter element is inserted into or sleeved on the shut-off valve, and the first annular fastener is sleeved on the shut-off valve or the filter element. The first annular fastener is used to apply force to the mating part of the filter element and the drain pipe, so as to connect the filter element and the drain pipe.
5. A domestic sewage pipe, characterized in that, include: Drainage pipes and shut-off fittings; The stopper includes: a blocking block; One end of the drain pipe is used to connect to the water tank, and the other end is used to connect to the public pipeline. The plug can be detachably installed in the drain pipe; When using a plug to connect the end of the drain pipe close to the public pipe, the plug will stop the drain pipe at that end.
6. A domestic sewage pipe according to claim 5, characterized in that, The drain pipe and plug are connected by thread, snap-fit, or flange.
7. A domestic sewage pipe according to claim 5, characterized in that, The stopper also includes: a second annular fastener; The plug is inserted into or fitted onto the drain pipe, and the second annular fastener is fitted onto the drain pipe or the plug. The second ring fastener is used to apply force to the mating part of the block and the drain pipe, so that the block and the drain pipe are connected.
8. A domestic sewage pipe according to claim 5, characterized in that, Also includes: Connectors; The connector is used to connect the drain pipe and the plug; When the block is separated from the drain pipe, the block is connected to the drain pipe via a connector.
9. A domestic sewage pipe according to any one of claims 1-8, characterized in that, The drainage pipe is a flexible pipe, which is used to connect to the water outlet of the pool or a rigid pipe.
10. A domestic sewage pipe according to any one of claims 1-8, characterized in that, The drainage pipe is a rigid pipe, which is used to connect the flexible pipe to the water tank.