Odor-resistant sealing joint for building drain pipes
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DANGYANG LANDSCAPE GARDENING ENG
- Filing Date
- 2025-08-13
- Publication Date
- 2026-05-26
AI Technical Summary
Existing washing machine floor drains are prone to odor backflow during use, and when a household has two washing machines, the drain pipes are prone to cross-flow or backflow.
A backflow prevention sealing joint for building drainage pipes has been designed, including an inlet pipe, an outlet pipe, an inverted trapezoidal sealing sleeve, a self-returning cover, and a sealing ring. Through the cooperation of the tee pipe section and the backflow prevention connector, the drain outlet is tightly sealed, and the self-returning cover automatically opens or closes to prevent odors from entering the room, while also preventing water from flowing back into the room.
It effectively prevents odors from flowing back into the room through the drain pipes, ensuring the cleanliness of the living environment, and prevents water from flowing back into or between the drain pipes of the two washing machines, thus improving the convenience of use.
Smart Images
Figure CN224283902U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drainage system technology, specifically to an anti-backflow sealing joint for building drainage pipes. Background Technology
[0002] Building drainage systems are used to collect and transport wastewater, sewage, and rainwater generated inside and around buildings. They mainly consist of components such as drainage risers and branch pipes, and are typically installed inside or around the building. Currently, floor drains used for draining washing machines are usually directly connected to the main drainage pipe or a branch pipe.
[0003] In practical use, existing washing machine floor drains lack anti-backflow odor prevention functions and are deficient in pipe blocking measures. This is mainly because: during daily use, odors often rise from the drain pipe, either directly from the floor drain or along the washing machine's piping into the main compartment and then into the room, causing annoyance and inconvenience to users and families. Furthermore, many households currently have two washing machines used together, but only one corresponding floor drain. Therefore, a T-junction is often used, which introduces another drawback: water from the two washing machine outlet hoses can easily cross-contaminate or even backflow. Based on these factors, we provide an anti-backflow odor sealing joint for building drainage pipes. Utility Model Content
[0004] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.
[0005] Therefore, the purpose of this utility model is to provide an anti-backflow sealing joint for building drainage pipes, in order to solve the problem mentioned in the background art where, in current washing machine floor drain systems, odors often rise from the drain pipe during daily use. For example, odors may directly escape from the floor drain or enter the washing machine's main compartment through the washing machine's pipes and then into the room, causing inconvenience and annoyance to users and their families. Furthermore, many households currently have two washing machines used together, but only one corresponding floor drain. Therefore, a T-joint pipe is often used in this situation, but this introduces another drawback: water from the two washing machine outlet hoses may inevitably cross-contaminate or even backflow.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a backflow prevention sealing joint for building drainage pipes, which includes an inlet pipe, an outlet pipe vertically fixed and connected to the bottom of the inlet pipe, and an inverted trapezoidal sealing sleeve fitted on the outer periphery of the outlet pipe and embedded in the inner edge of the floor drain pipe. The inlet pipe and the outlet pipe form a three-way pipe section.
[0007] The anti-backflow connector includes a connector branch pipe inserted into the end of the outlet pipe, wherein the connector branch pipe is fitted into one end of the inlet pipe and is hinged with a self-returning disc cover, and the connection between the outer periphery of the connector branch pipe and the inlet pipe has an O-ring seal.
[0008] The sealing rubber sleeve is located on the opposite end of the connector branch pipe to the self-returning disc cover, and is used to seal and fix the washing machine hose head and the connector branch pipe.
[0009] As a preferred embodiment of the anti-backflow sealing joint for building drainage pipes described in this utility model, the outlet pipe is vertically inserted into the inside of the floor drain pipe, and the upper outer periphery of the outlet pipe also has an outer retaining ring, the outer diameter of which is larger than the inlet diameter of the floor drain pipe.
[0010] As a preferred embodiment of the anti-backflow sealing joint for building drainage pipes described in this utility model, the inner port of the joint branch pipe is inclined, and the bottom length of the inner port is greater than its top length. The upper part of the inner port of the joint branch pipe also has a connecting section. The self-returning disc cover and the connecting section are connected longitudinally by a hinge.
[0011] As a preferred embodiment of the anti-backflow sealing joint for building drainage pipes described in this utility model, a limiting ring is also fixed on the outer periphery of the joint branch pipe, and one end of the O-ring seal abuts against the limiting ring. At the same time, the outer diameter of the limiting ring is greater than or equal to the outer diameter of the inlet pipe.
[0012] As a preferred embodiment of the anti-backflow sealing joint for building drainage pipes described in this utility model, the inner edge of the outer end of the joint branch pipe has a circumferential slope.
[0013] The sealing rubber sleeve includes an outer retaining ring with a diameter greater than or equal to the outer diameter of the joint branch pipe, and a conical ring fixed to one side of the outer retaining ring and fitted into the inner side of the circumferential slope.
[0014] Among them, the outer diameter of the drain pipe head of the washing machine is greater than the minimum inner diameter of the circumferential slope and less than the maximum inner diameter of the circumferential slope, and the conical ring is fitted around the outer circumference of the drain pipe head.
[0015] As a preferred embodiment of the anti-backflow sealing joint for building drainage pipes described in this utility model, the end of the water inlet pipe is also equipped with a plug.
[0016] As a preferred embodiment of the anti-backflow sealing joint for building drainage pipes described in this utility model, the inner diameter of the joint branch pipe is smaller than the inner diameter of the outlet pipe, and the inner diameter of the outlet pipe is greater than or equal to the inner diameter of the inlet pipe.
[0017] Compared with the prior art, the beneficial effects of this utility model are:
[0018] (i) The building's drainage pipes use anti-backflow sealing joints. By inserting the outlet pipe into the inner edge of the floor drain pipe and cooperating with the inverted trapezoidal sealing sleeve, a tight seal is formed at the floor drain opening, preventing odors from flowing back into the room from the drain pipe. In use, when water from the washing machine's drain pipe flows into the inlet and outlet pipes through the joint branch pipe, the self-returning cover will automatically open to allow passage. When the washing machine stops draining, the self-returning cover will automatically fall back into place under gravity and close the inner end of the joint branch pipe. In this way, it can effectively prevent and reduce odors from the floor drain pipe from entering the washing machine and the room through the pipes, bringing convenience to users and families.
[0019] (ii) The building's drainage pipe uses an anti-backflow sealing joint, which forms a three-way pipe section by the inlet pipe and the outlet pipe. With the cooperation of the anti-backflow connector and the sealing rubber sleeve, the two ends of the washing machine drain pipe are sealed and connected separately. At the same time, with the cooperation of the self-returning cover, it can effectively prevent the two water flows from flowing back or flowing upward. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall external structure of this utility model;
[0021] Figure 2 This is a schematic diagram of the disassembled joint device of this utility model;
[0022] Figure 3 This is a schematic diagram of the anti-reverse connector structure of this utility model;
[0023] Figure 4 This is a schematic diagram of the sealing rubber ring structure of this utility model;
[0024] Figure 5 This is a schematic diagram of the joint branch pipe, sealing rubber sleeve and washing machine drain pipe of this utility model.
[0025] In the diagram: 100, inlet pipe; 200, outlet pipe; 210, inverted trapezoidal sealing sleeve; 220, limit cap; 300, anti-reverse connector; 310, joint branch pipe; 3101, circumferential slope; 320, self-returning disc cover; 321, hinge shaft; 330, O-ring seal; 340, limit retaining ring; 400, sealing sleeve; 410, outer retaining ring; 420, conical ring; 500, plug. Detailed Implementation
[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0027] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.
[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.
[0029] Figures 1-5 The diagram shown is a complete structural schematic of the anti-backflow sealing joint for building drainage pipes according to this utility model. Please refer to [link / reference]. Figures 1-5 The anti-backflow sealing joint for building drainage pipes in this embodiment includes an inlet pipe 100, with an outlet pipe 200 vertically fixed and connected to the bottom of the inlet pipe 100. An inverted trapezoidal sealing sleeve 210 is fitted on the outer periphery of the outlet pipe 200 and fits into the inner edge of the drain pipe. The inlet pipe 100 and the outlet pipe 200 form a tee pipe section. The anti-backflow connector 300 includes a connector branch pipe 310 inserted into the end of the outlet pipe 200. A self-returning disc cover 320 is hinged to one end of the connector branch pipe 310 inserted into the inlet pipe 100. An O-ring 330 is provided at the connection between the outer periphery of the connector branch pipe 310 and the inlet pipe 100. A sealing sleeve 400 is provided at the opposite end of the connector branch pipe 310 to the self-returning disc cover 320 and is used to seal and fix the washing machine pipe head and the connector branch pipe 310.
[0030] The outlet pipe 200 is vertically inserted into the inside of the drain pipe. The upper outer circumference of the outlet pipe 200 also has an outer retaining ring 410, the outer diameter of which is larger than the inlet diameter of the drain pipe. By inserting the outlet pipe 200 into the inner edge of the drain pipe, and with the cooperation of the inverted trapezoidal sealing sleeve 210 and the limiting cap 220, the drain opening can be effectively sealed, preventing foul odors from flowing back into the room from the sewer pipe, thus ensuring the cleanliness of the living environment.
[0031] The inner port of the connector branch pipe 310 is inclined, and the bottom length of the inner port is greater than its top length. The upper part of the inner port of the connector branch pipe 310 also has a connecting section. The self-returning cover 320 and the connecting section are connected longitudinally via a hinge pin 321. It should be noted that the connector branch pipe 310, including the returning cover 320 and other mating structures, primarily uses conventional PVC material. The returning cover 320 has a certain thickness and weight to ensure it automatically falls back into place when water is not flowing. An O-ring seal 330 ensures a secure connection and sealing between the connector branch pipe 310 and the inlet pipe 100. Replacement or installation is simple; the O-ring can be easily pulled out. A limiting ring 340 is also fixed to the outer periphery of the connector branch pipe 310, and one end of the O-ring seal 330 abuts against the limiting ring 340. The outer diameter of the limiting ring 340 is greater than or equal to the outer diameter of the inlet pipe 100. The insertion depth of the connector branch pipe 310 into the water inlet pipe 100 is limited by the limiting retaining ring 340, ensuring the standardization of the pipe joint. The inner edge of the outer end of the connector branch pipe 310 has a circumferential slope 3101; the sealing rubber sleeve 400 includes an outer retaining ring 410 with a diameter greater than or equal to the outer diameter of the connector branch pipe 310, and a conical ring 420 fixed to one side of the outer retaining ring 410 and fitted into the inner side of the circumferential slope 3101; wherein, the outer diameter of the washing machine's drain pipe head is greater than the minimum inner diameter of the circumferential slope 3101 and less than the maximum inner diameter of the circumferential slope 3101, and the conical ring 420 is fitted onto the outer circumference of the drain pipe head. The circumferential slope 3101 allows the drain pipe head of the washing machine to be inserted more tightly. At the same time, after insertion, the conical ring 420 of the sealing rubber sleeve 400 can be used to securely plug the drain pipe head and the connector branch pipe 310, thereby further improving the sealing performance and preventing leakage and backflow of odor. Specifically, in this embodiment, by inserting the outlet pipe 200 into the inner edge of the drain pipe and forming a tight seal at the drain opening with the cooperation of the inverted trapezoidal sealing sleeve 210, etc., odors and smells are prevented from flowing back into the room from the drain pipe. The drain pipe head of the washing machine and the outer end of the connector branch pipe 310 are sealed and connected with the sealing sleeve ring 400 and the circumferential slope 3101. The inner end of the connector branch pipe 310 and the inlet pipe 100 are sealed and connected with the cooperation of the O-ring 330, etc. In use, when water in the washing machine drain pipe flows into the inlet pipe 100 and the outlet pipe 200 through the connector branch pipe 310, the self-returning cover 320 will automatically open to allow passage. When the washing machine stops draining, the self-returning cover 320 will automatically fall back into place under the action of gravity and close the inner end of the connector branch pipe 310. In this way, odors and smells in the drain pipe can be effectively prevented and reduced from entering the washing machine and the room through the pipe.
[0032] In this embodiment, a three-way pipe section is formed by the inlet pipe 100 and the outlet pipe 200, and the two ends of the washing machine drain pipe are sealed and connected in the cooperation of the anti-backflow connector 300 and the sealing rubber sleeve 400. At the same time, with the cooperation of the self-returning disc cover 320, it can effectively prevent the two water flows from flowing back or flowing upward.
[0033] Furthermore, the end of the water inlet pipe 100 is also equipped with a plug 500. It is understood that users can choose to insert one or two anti-backflow connectors 300 at the end of the tee depending on the number of washing machines. For example, when inserting a washing machine pipe, the other end of the tee pipe, i.e., the water inlet pipe 100, can be sealed by the plug 500. The plug 500 can be made of rubber. Of course, the plug 500 and the outer end of the water inlet pipe 100 can also be threaded together, and there is no limitation on this.
[0034] Furthermore, the inner diameter of the connector branch pipe 310 is smaller than the inner diameter of the outlet pipe 200, while the inner diameter of the outlet pipe 200 is greater than or equal to the inner diameter of the inlet pipe 100. The purpose of making the inner diameter of the connector branch pipe 310 smaller than the inner diameter of the outlet pipe 200 is to effectively release the drainage pressure caused by the simultaneous operation of two washing machines.
[0035] In summary, the anti-backflow sealing joint for building drainage pipes in this embodiment, during use, involves inserting the outlet pipe 200 into the inner edge of the drain pipe, and forming a tight seal at the drain opening with the cooperation of the inverted trapezoidal sealing sleeve 210, etc., to prevent odors from flowing back into the room from the sewer pipe; by cooperating with the sealing sleeve 400 and the circumferential slope 3101, the drain pipe head of the washing machine and the outer end of the joint branch pipe 310 are sealed and inserted; and by cooperating with the O-ring sealing ring 330, etc., the inner end of the joint branch pipe 310 and the inlet pipe 100 are sealed and connected. When water from the washing machine's drain pipe flows into the inlet pipe 100 and outlet pipe 200 through the connector branch pipe 310, the self-returning cover 320 automatically opens to facilitate drainage. When the washing machine stops draining, the self-returning cover 320 automatically flips back into place under gravity and closes the inner end of the connector branch pipe 310. This effectively prevents and reduces odors from the floor drain pipe from entering the washing machine and the room through the pipes, providing convenience for users and families. At the same time, with the cooperation of the self-returning cover 320, it can effectively prevent the water from flowing back or flowing between the two water lines.
[0036] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A backflow prevention sealing joint for building drainage pipes, characterized in that, It includes an inlet pipe (100), the bottom of which is vertically and fixedly connected to an outlet pipe (200). The outlet pipe (200) is fitted with an inverted trapezoidal sealing sleeve (210) that fits into the inner edge of the drain pipe. The inlet pipe (100) and the outlet pipe (200) form a three-way pipe section. The anti-reverse connector (300) includes a connector branch pipe (310) inserted into the end of the outlet pipe (200), wherein the connector branch pipe (310) is inserted into one end of the inlet pipe (100) and is hinged with a self-returning disc cover (320), and the connection between the outer periphery of the connector branch pipe (310) and the inlet pipe (100) has an O-ring seal (330); A sealing rubber sleeve (400) is provided on the opposite end of the connector branch pipe (310) to the self-returning disc cover (320) to seal and fix the washing machine pipe head and the connector branch pipe (310).
2. The anti-backflow sealing joint for building drainage pipes according to claim 1, characterized in that: The water outlet pipe (200) is vertically inserted into the inside of the drain pipe. The upper outer periphery of the water outlet pipe (200) also has an outer retaining ring (410), the outer diameter of which is larger than the inlet diameter of the drain pipe.
3. The anti-backflow sealing joint for building drainage pipes according to claim 1, characterized in that: The inner port of the connector branch pipe (310) is inclined, and the bottom length of the inner port is greater than its top length. The upper part of the inner port of the connector branch pipe (310) also has a connecting section. The self-returning disc cover (320) and the connecting section are connected longitudinally by a hinge shaft (321).
4. The anti-backflow sealing joint for building drainage pipes according to claim 1, characterized in that: The outer periphery of the connector branch pipe (310) is also fixed with a limiting ring (340), and one end of the O-ring seal (330) abuts against the limiting ring (340). At the same time, the outer diameter of the limiting ring (340) is greater than or equal to the outer diameter of the water inlet pipe (100).
5. The anti-backflow sealing joint for building drainage pipes according to claim 1, characterized in that: The outer end of the joint branch pipe (310) has a circumferential slope (3101) along its inner edge; The sealing rubber ring (400) includes an outer retaining ring (410) with a diameter greater than or equal to the outer diameter of the joint branch pipe (310) and a conical ring (420) fixed to one side of the outer retaining ring (410) and fitted into the inner side of the circumferential slope (3101). Among them, the outer diameter of the drain pipe head of the washing machine is greater than the minimum inner diameter of the circumferential slope (3101) and less than the maximum inner diameter of the circumferential slope (3101), and the conical ring (420) is fitted around the outer periphery of the drain pipe head.
6. The anti-backflow sealing joint for building drainage pipes according to claim 1, characterized in that: The end of the water inlet pipe (100) is also equipped with a plug (500).
7. The anti-backflow sealing joint for building drainage pipes according to claim 1, characterized in that: The inner diameter of the connector branch pipe (310) is smaller than the inner diameter of the outlet pipe (200), and the inner diameter of the outlet pipe (200) is greater than or equal to the inner diameter of the inlet pipe (100).