A built-in water seal device for a drain

Abstract

The utility model discloses a kind of built-in water seal devices of drainage pipeline, belong to building drainage technical field.The device includes water seal core and sealing strip.Water seal core is made of water seal bottom plate, water seal panel and the three partition plates evenly distributed between them, and water seal bottom plate and panel are 240 ° sector shape.When water seal core is sealed and inserted into drainage pipeline by sealing strip, form water inlet cavity, central water seal cavity and water outlet cavity.The first partition plate lower portion is provided with water hole to connect water inlet cavity and water seal cavity, the second partition plate upper portion is provided with water hole to connect water seal cavity and water outlet cavity, and the height difference of two water holes ensures to form ≥50mm effective water seal.The utility model is simple in structure, can be directly inserted into the pipeline of existing waterless trap floor drain, form reliable water seal under the premise of not damaging decoration and pipeline, fully meet the requirement of national mandatory standard to water seal depth, solve the problem of unreliable mechanical seal floor drain and difficult reconstruction.

Description

Technical Field

[0001] This utility model belongs to the field of building drainage engineering and relates to a water seal device, particularly a water seal device that can be directly inserted into existing drainage pipes to prevent odor backflow. Background Technology

[0002] Drainage pipe systems are widely used in various building projects, but odors from outdoor drainage pipes or sewage treatment facilities may seep back into indoor spaces through these pipes. Existing odor prevention solutions mainly include two types: water seals and mechanical seals. Bell-type, mechanical valve-type, or water seal depth-less floor drains are widely used in existing drainage systems.

[0003] The national mandatory standard GB55020-2021, "General Code for Building Water Supply, Drainage and Water Conservation," stipulates in Article 4.2.2 that "the water seal depth of the water seal device shall not be less than 50mm," and in Article 4.2.3 that "the use of bell-shaped floor drains and the use of movable mechanical valves to replace water seals are strictly prohibited." The interpretation of these articles clearly states that bell-shaped floor drains and the use of mechanical seals to replace water seals pose risks of environmental pollution and health damage, and should be prohibited.

[0004] Existing renovation solutions have significant shortcomings: replacing the entire floor drain or adding a water trap to the drainage pipe requires damaging the decorative layer or even the structural layer, making construction complex and costly. CN206279614U discloses a deep-sealed water trap, but its radially arranged triple-walled structure results in a very narrow flow cross-section, affecting drainage flow and easily trapping impurities; its sealing surface resembles a bell-shaped structure, and the 30mm lower limit of the water seal depth does not comply with GB55020-2021. CN217175136U discloses an odor-proof floor drain core, using a movable valve plate and magnetic structure to achieve sealing through mechanical locking, but this type of structure itself does not comply with GB55020-2021. CN218818123U discloses a built-in water seal structure for drainage pipes; although it involves a built-in structure, its threaded installation limits its application in existing pipe renovations and makes cleaning inconvenient. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a simple and easy-to-install built-in water seal device for drainage pipes, which can be directly inserted into a standard drainage pipe to form a reliable water seal without damaging the existing decoration and pipes, and meets the requirements of GB55020-2021 standard.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] An internal water seal device for drainage pipes includes a water seal core and a sealing strip. The water seal core has a water seal base plate at the bottom and a water seal panel at the top. A first partition, a second partition, and a third partition are evenly distributed 120° circumferentially around the central axis of the pipe. Both the water seal base plate and the water seal panel have a 240° fan-shaped structure. A water passage hole is formed at the bottom of the first partition and at the top of the second partition. After being inserted into the drainage pipe, the water seal core forms three independent chambers with the inner wall of the pipe: an inlet chamber, a water seal chamber, and an outlet chamber.

[0008] Preferably, the outer edges of the water seal bottom plate, the first partition, the second partition, and the third partition are provided with Ω-shaped grooves.

[0009] Preferably, the sealing strip is a continuous strip with a circular cross-section, made of rubber, embedded in the Ω-shaped groove, and forms an interference fit with the water seal core and the inner wall of the drainage pipe.

[0010] Preferably, the height difference between the top of the water passage hole in the first partition and the bottom of the water passage hole in the second partition is ≥50mm to ensure that the water seal depth meets the specifications. A fan-shaped protrusion is provided at the central notch of the water seal panel for easy removal by hand or tool.

[0011] The beneficial effects of this utility model include:

[0012] Reliable and compliant water seal: A continuous water seal cavity is formed by partitions, with a water seal depth of ≥50mm, which fully complies with the mandatory standard GB55020-2021 and has a much better odor prevention effect than mechanical seals.

[0013] Simple structure and low cost: It consists of only two parts, a water seal core and a sealing strip, and can be mass-produced using injection molding, resulting in low cost.

[0014] Easy to install and requires no modification: It can be used by simply inserting it into the existing drainage pipe without damaging the floor drain or pipe structure, which greatly reduces the cost of modification.

[0015] Easy to clean and maintain: The water seal core can be removed as a whole from the pipe, and there are no dead corners in each chamber, making it easy to clean hair and debris.

[0016] Overcoming technical bias: Existing technologies generally pursue complex mechanical seal structures. This utility model returns to the principle of water seal and solves the problem of realizing built-in water seal in narrow pipe spaces through innovative chamber design. Attached Figure Description

[0017] Figure 1 This is an isometric schematic diagram of this utility model.

[0018] Figure 2 This is a front view of the present invention (partial cross-section of the upper water passage).

[0019] Figure 3 This is a side view of the present invention.

[0020] Figure 4 This is a top view of the present invention.

[0021] Figure 5 yes Figure 2 A-direction cross-section.

[0022] Figure 6 This is a cross-sectional view of the present invention installed inside a drainage pipe, showing the formation of three chambers.

[0023] Figure 7 This is a magnified view of a portion of the assembly of the sealing strip and the water seal core.

[0024] Figure 8 This is a schematic diagram of the overall usage state of this utility model.

[0025] In the diagram: 1-Water seal core, 2-Sealing strip, 3-Drainage pipe, 11-Water seal base plate, 12-Water seal panel, 13-First partition, 14-Second partition, 15-Third partition, 21-Base plate sealing strip, 22-First partition sealing strip, 23-Second partition sealing strip, 24-Third partition sealing strip, 31-Inlet chamber, 32-Water seal chamber, 33-Outlet chamber. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] like Figures 1-3 As shown, the water seal core 1 is made of ABS engineering plastic through one-time injection molding and includes a water seal base plate 11, a water seal panel 12, and a first partition 13, a second partition 14, and a third partition 15 connecting the two. The three partitions are evenly distributed 120° around the central axis of the pipe, dividing the internal space into three parts.

[0028] Both the water seal base plate 11 and the water seal panel 12 are 240° fan-shaped structures. Figure 4 A 120° notch is provided for water flow. A rectangular water passage hole is formed at the bottom of the first partition 13, and a water passage hole of the same size is formed at the top of the second partition 14. The vertical height difference between the two water passage holes is 50mm. This design ensures that the water seal depth meets the requirements of GB55020-2021, while also providing good drainage performance and anti-clogging capability.

[0029] like Figures 5-6As shown, when the water seal core 1 is inserted into a standard 50mm diameter drainage pipe 3, the sealing strip 2 forms three independent chambers: an inlet chamber 31 (corresponding to the space enclosed by the first partition 13 and the inner wall of the pipe), a water seal chamber 32 (the central area), and an outlet chamber 33 (corresponding to the space enclosed by the second partition 14 and the inner wall of the pipe). Water flows from the inlet chamber 31 through the water passage at the bottom of the first partition 13 into the water seal chamber 32, and then through the water passage at the top of the second partition 14 into the outlet chamber 33 for discharge. During this process, a certain height of water column is always maintained in the water seal chamber 32, forming an effective water seal.

[0030] The sealing strip 2 is made of silicone rubber and consists of four parts: the base plate sealing strip 21, the first partition sealing strip 22, the second partition sealing strip 23, and the third partition sealing strip 24, forming an integral continuous strip structure. Figure 5 ), cross-sectional diameter 3mm ( Figure 7 During installation, press it into the Ω-shaped groove on the outer edge of the water seal core. Due to the elastic deformation of the rubber, the sealing strip 2 forms an interference fit with the inner wall of the pipe, which not only prevents short circuits in the water flow but also ensures the stability of the device in the pipeline.

[0031] A fan-shaped protrusion is provided at the central notch of the water seal panel 12. Figure 4 It is easy to hold with fingers or tools, allowing for quick installation and removal. In actual use, simply insert the device vertically into the drain pipe from the drain opening; no auxiliary fasteners are required.

[0032] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it. Those skilled in the art can make various modifications based on the concept of this utility model, and these modifications should all be considered to fall within the protection scope of this utility model.

Claims

1. A built-in water seal device for drainage pipes, characterized in that: The system includes a water seal core (1) and a sealing strip (2); the water seal core (1) includes a water seal base plate (11), a water seal panel (12), and a first partition (13), a second partition (14), and a third partition (15) connecting the water seal base plate (11) and the water seal panel (12); the first partition (13), the second partition (14), and the third partition (15) are evenly distributed around the central axis of the drainage pipe (3) at an angle of 120°; the water seal base plate (11) and the water seal panel (2) are connected by a water seal core (11) and a sealing strip (2); the water seal core (11) includes a water seal base plate (11), a water seal panel (12), and a water seal panel (2). All sealing panels (12) are 240° fan-shaped structures; after the water seal core (1) is inserted into the drainage pipe (3), it cooperates with the inner wall of the drainage pipe (3) to divide the inside of the pipe into an independent inlet chamber (31), a water seal chamber (32) and an outlet chamber (33); the lower part of the first partition (13) is provided with a water passage hole connecting the inlet chamber (31) and the water seal chamber (32); the upper part of the second partition (14) is provided with a water passage hole connecting the water seal chamber (32) and the outlet chamber (33).

2. The built-in water seal device for drainage pipes according to claim 1, characterized in that: The outer edges of the water seal bottom plate (11), the first partition plate (13), the second partition plate (14) and the third partition plate (15) that contact the inner wall of the drainage pipe (3) are all provided with Ω-shaped grooves.

3. The built-in water seal device for drainage pipes according to claim 2, characterized in that: The sealing strip (2) is a continuous strip with a circular cross-section, and it is embedded in each of the Ω-shaped grooves; the sealing strip (2) forms an interference fit with the Ω-shaped grooves and the inner wall of the drainage pipe (3) respectively.

4. The built-in water seal device for drainage pipes according to claim 1, characterized in that: The vertical height difference H between the top of the water passage hole of the first partition (13) and the bottom of the water passage hole of the second partition (14) is ≥50mm.

5. A built-in water seal device for drainage pipes according to claim 1, characterized in that: The water seal panel (12) has a fan-shaped protrusion at the center notch, which makes it easy to grasp and extract by hand or tool.

6. A built-in water seal device for drainage pipes according to any one of claims 1 to 5, characterized in that: The water seal core (1) is formed by integral injection molding of plastic or by splicing separate parts.

7. A built-in water seal device for a drainage pipe according to any one of claims 1 to 5, characterized in that: The sealing strip (2) is made of rubber.

Images