Drainage three-way pipe
By incorporating a vent and dust cover at the top of the drainage tee riser, the negative pressure problem in high-rise building drainage is solved, achieving efficient drainage and dust prevention, and is suitable for both new and old buildings.
Patent Information
- Application Number
- CN202520260829.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-18
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-02-18
AI Technical Summary
In high-rise buildings, existing building drainage risers are prone to creating negative pressure, leading to poor drainage, overflow of sewage and wastewater, or the entry of harmful gases into the room. Moreover, existing buildings cannot improve drainage efficiency by changing the pipe diameter or adding ventilated risers.
Design a drainage tee pipe with a vent hole and dust cover on the top side wall of the riser to ensure that the internal air pressure is consistent with the atmospheric pressure and prevent negative pressure from forming. Combined with gravity drainage and bypass pipe design, it avoids sewage overflow and dust entry.
It improves drainage flow rate, prevents water seal failure and dust ingress, saves materials and construction costs, and has a wide range of applications, suitable for both new and old buildings.
Smart Images
Figure CN223579285U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to building drainage technical field relates to a drainage tee. BACKGROUND
[0002] When the sewage in the building flows downward in the vertical drainage riser, the sewage does vortex motion along the inner wall of the pipe, and an air channel is generated at the central part of the drainage riser, forming a gas-water mixed flow; with the increase of the height of the drainage riser, the descending speed of the sewage in the drainage riser also becomes faster and faster, and the air resistance of the descending sewage also becomes larger and larger, resulting in that the air cross section of the pipe center becomes smaller and smaller, and even disappears. At this time, the water flow forms a complete cross section seal in the riser, causing the positive and negative pressure difference in the riser, and the siphon or air backflow, resulting in poor drainage or even the collapse of the pipe, which can damage the water seal of the floor drain, wash basin and other sanitary appliances connected with the drainage riser and the horizontal pipe of each floor, so as to cause the harmful gas, bacteria, pathogen and reptile in the drainage riser to enter the indoor, causing harm to the indoor air environment and the health of people, and even the sewage overflow from the floor drain and sanitary appliance.
[0003] In order to solve the above problems, the pipe diameter of the drainage riser is usually increased or a vent riser is additionally arranged in the newly built building to improve the drainage efficiency, but this method needs to increase at least one time of pipe material, which not only increases the material cost, but also occupies more and more space of the drainage riser; and for the existing building, since the drainage riser penetrates all floors from top to bottom, the position and size of the reserved hole on the floor are fixed, it is difficult to replace the drainage riser of the existing building as a whole, and the pipe diameter cannot be directly changed and the special vent riser cannot be additionally arranged, so the existing building cannot improve the drainage efficiency by increasing the pipe diameter of the drainage riser or additionally arranging a vent riser. SUMMARY
[0004] The utility model aims at the above problems existing in the prior art, and provides a drainage tee.
[0005] The utility model discloses the technical problem to be solved is how to better improve the drainage efficiency of the building drainage tee while preventing dust from entering the pipe.
[0006] A drainage tee, comprising an integrally formed riser and a bypass pipe, characterized in that the top side wall of the riser is provided with a vent hole, the top end of the riser is provided with a dust cover, and the edge of the dust cover protrudes outward from the outer side wall of the riser.
[0007] The ventilation hole is arranged on the top side wall of the vertical pipe, so that the internal air pressure of the drainage tee pipe is always consistent with the atmospheric pressure, the internal air-water mixed flow of the drainage tee pipe can be maintained, the negative pressure in the drainage tee pipe is avoided, the flow rate of drainage is improved, the water seal failure is avoided, the sewage overflow is avoided, the structure is simple, the construction amount is small, the occupied space is small, the material cost is saved, the application range is wide, so that the drainage efficiency of the building drainage tee pipe can be improved, in addition, the edge of the dust cover protrudes from the outer side wall of the vertical pipe, so that the dust cover at the top end of the vertical pipe can avoid dust entering the pipeline, thereby better improving the drainage efficiency of the building drainage tee pipe and preventing dust from entering the pipe.
[0008] In the drainage tee pipe, the dust cover is hollow and conical, and the bottom side wall of the dust cover is inclined from outside to inside from top to bottom. The dust cover is hollow and conical, which can avoid water accumulation on the cover top and better accommodate gas. The bottom side wall of the dust cover is inclined from outside to inside from top to bottom, which can guide external air into the ventilation hole below the dust cover, ensure that the internal air pressure of the drainage tee pipe is always consistent with the atmospheric pressure, maintain the internal air-water mixed flow of the drainage tee pipe, avoid the formation of negative pressure in the drainage tee pipe, and improve the flow rate of drainage.
[0009] In the drainage tee pipe, the dust cover and the vertical pipe are integrally formed, and the dust cover and the vertical pipe jointly form the hole edge of the ventilation hole. The integrally formed structure of the dust cover and the vertical pipe can improve the structural strength of the drainage tee pipe, and the dust cover and the vertical pipe jointly form the hole edge of the ventilation hole, which can improve the air intake of the ventilation hole, ensure that the internal air pressure of the drainage tee pipe is always consistent with the atmospheric pressure, maintain the internal air-water mixed flow of the drainage tee pipe, avoid the formation of negative pressure in the drainage tee pipe, and improve the flow rate of drainage.
[0010] In the drainage tee pipe, the ventilation hole has a plurality of ventilation holes and is distributed along the circumference of the vertical pipe. The plurality of ventilation holes can better ensure that the internal air pressure of the drainage tee pipe is always consistent with the atmospheric pressure.
[0011] In the drainage tee pipe, the bypass pipe is arranged on the bottom side wall of the vertical pipe. The vertical pipe of the drainage tee pipe can fully utilize gravity drainage, and the bypass pipe is arranged on the bottom of the vertical pipe, so that the drainage tee pipe has a longer upper part above the bypass pipe, which can better avoid backflow.
[0012] Compared with the prior art, the advantages of the drainage tee pipe lie in that the drainage tee pipe is provided with the air vent on the top side wall of the vertical pipe, the air pressure in the drainage tee pipe is always consistent with the atmospheric pressure, the air-water mixed flow can be maintained in the drainage tee pipe, the negative pressure is avoided in the drainage tee pipe, the flow rate of drainage is improved, the water seal failure and the overflow of sewage are avoided, the structure is simple, the construction amount is small, the occupied space is small, the material cost is saved, the application range is wide, and thus the drainage efficiency of the building drainage tee pipe is improved, in addition, the dust cover at the top end of the vertical pipe can avoid the dust from entering the pipeline, and thus the drainage efficiency of the building drainage tee pipe is better improved while preventing the dust from entering the pipeline. BRIEF DESCRIPTION OF DRAWINGS
[0013] Fig. 1 is a schematic view of the three-dimensional structure of the drainage tee pipe.
[0014] Fig. 2 is a sectional view of the drainage tee pipe.
[0015] In the figure, 1 is a vertical pipe, 2 is a bypass pipe, 3 is an air vent, 4 is a dust cover, and 4a is a bottom side wall. DETAILED DESCRIPTION
[0016] The following is a specific embodiment of the utility model and further describes the technical scheme of the utility model in combination with the drawings, but the utility model is not limited to these embodiments.
[0017] A drainage tee pipe, referring to Figs. 1-2 , comprises an integrally formed vertical pipe 1 and bypass pipe 2, the top side wall of the vertical pipe 1 is provided with an air vent 3, the top end of the vertical pipe 1 is provided with a dust cover 4, and the edge of the dust cover 4 protrudes from the outer side wall of the vertical pipe 1.
[0018] The drainage tee pipe is provided with the air vent 3 on the top side wall of the vertical pipe 1, the air pressure in the drainage tee pipe is always consistent with the atmospheric pressure, the air-water mixed flow can be maintained in the drainage tee pipe, the negative pressure is avoided in the drainage tee pipe, the flow rate of drainage is improved, the water seal failure and the overflow of sewage are avoided, the structure is simple, the construction amount is small, the occupied space is small, the material cost is saved, the application range is wide, and thus the drainage efficiency of the building drainage tee pipe is improved, in addition, the dust cover 4 at the top end of the vertical pipe 1 can avoid the dust from entering the pipeline, and thus the drainage efficiency of the building drainage tee pipe is better improved while preventing the dust from entering the pipeline.
[0019] Preferably, the dust cover 4 is hollow conical, and the bottom sidewall 4a of the dust cover 4 is inclined from outside to inside from top to bottom. Preferably, the dust cover 4 and the stand pipe 1 are integrally formed, and the dust cover 4 and the stand pipe 1 jointly form the hole edge of the vent hole 3. Preferably, the vent hole 3 has multiple and is distributed along the circumference of the stand pipe 1. Preferably, the bypass pipe 2 is arranged on the bottom sidewall of the stand pipe 1.
[0020] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.
Claims
1. A drainage tee pipe, comprising an integrally formed riser pipe (1) and a bypass pipe (2), characterized in that, The top side wall of the riser (1) is provided with a ventilation hole (3), and the top of the riser (1) is provided with a dust cover (4), and the edge of the dust cover (4) protrudes from the outer side wall of the riser (1).
2. A drainage tee pipe according to claim 1, characterized in that, The dust cover (4) is a hollow cone shape, and the bottom sidewall (4a) of the dust cover (4) is inclined from the outside to the inside from top to bottom.
3. A drainage tee pipe according to claim 1 or 2, characterized in that, The dust cover (4) and the riser (1) are integrally formed, and the dust cover (4) and the riser (1) together form the edge of the vent (3).
4. A drainage tee pipe according to claim 1 or 2, characterized in that, The ventilation holes (3) are multiple and distributed circumferentially along the riser (1).
5. A drainage tee pipe according to claim 1 or 2, characterized in that, The bypass pipe (2) is installed on the bottom side wall of the riser (1).