Special single vertical pipe fitting with ventilation branch pipe
By introducing venting branch pipes and guide vanes into special single-pipe fittings, the water flow channel is optimized, solving the problem of unstable flow in the drainage system of high-rise residential buildings and achieving more efficient drainage and adaptability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LINHAI WEIXING NEW BUILDING MATERIALS CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-04-28
AI Technical Summary
Existing building drainage systems, especially the special single-pipe systems of high-rise and super high-rise residential buildings, face challenges in handling complex three-phase flows of water, air, and solids, including unstable flow rates, unreasonable vortex structure design, difficulty in manufacturing and forming, and adaptability to complex drainage scenarios.
A special single-pipe fitting with a venting branch pipe was designed, including a vertical pipe body and a horizontal branch pipe. The pipe body is equipped with a central guide vane and a gas passage. The guide vane forms a wall-attached vortex, and combined with the gas passage, the water flow channel is optimized to avoid water blockage and reduce pressure fluctuations.
It increases the flow rate of the drainage system, reduces pressure fluctuations in horizontal branch pipes, improves the system's ventilation and water flow, and is suitable for various drainage scenarios.
Smart Images
Figure CN224174755U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building drainage risers, specifically to a special single riser fitting with a venting branch pipe. Background Technology
[0002] Currently, in the field of building drainage, with the rapid development of urbanization, the limited land area and dense population in cities, along with the increasing proportion of high-rise and super high-rise residential buildings, have significantly increased the pressure on building drainage systems. Sewage in building drainage systems is not a full-flow process and contains a certain amount of solid waste such as feces, forming a complex three-phase flow of water, air, and solids. The local flow pattern is unstable during drainage, leading to a complex drainage process and causing drastic changes in energy and pressure as the water falls within the drainage riser. The flow rate issue urgently needs to be addressed. Therefore, special single-rise risers have emerged.
[0003] For special single-pipe systems, several issues still need to be addressed: First, regarding the swirling structure, maintaining good water-liquid separation and preserving the intermediate gas channel during two-phase drainage is crucial for improving flow rate. Therefore, research on the drainage mechanism and hydraulic structure design of special single-pipe systems is essential. Second, swirling devices generally employ a high-rib molding method, and the current trend in drainage materials from PVC to PE places higher demands on the processing, molding, and stable production of the entire system. Third, drainage scenarios are becoming increasingly complex. Different drainage scenarios, such as large-sloping, small-sloping, and non-sloping same-floor drainage systems, as well as integrated drainage systems, place increasingly higher demands on riser drainage products. Therefore, it is necessary to develop a swirling special single-pipe system that meets performance standards and can satisfy actual complex operating conditions. Utility Model Content
[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a special single riser fitting with a vent branch pipe, which effectively improves the system flow rate.
[0005] To achieve the above objectives, the technical solution of this utility model is as follows:
[0006] A special single riser fitting with a vent branch pipe includes a vertical pipe body connecting to a drainage riser and a horizontal branch pipe connecting to a drainage device. The vertical pipe body includes a top socket, a middle expansion section, a middle reduction section, and a bottom socket. The top socket is located at the upper end of the middle expansion section, the middle reduction section is located below the middle expansion section, and the bottom socket is located at the bottom of the middle reduction section. A middle guide vane is installed inside the middle reduction section.
[0007] Furthermore, a venting branch pipe is installed on the upper surface of the horizontal branch pipe, and the venting branch pipe is connected to the horizontal branch pipe and the top socket.
[0008] Furthermore, the inner diameter of the ventilation branch pipe is 3-6 mm.
[0009] Furthermore, a horizontal branch pipe inlet baffle is provided at the water inlet of the horizontal branch pipe, with the height of the horizontal branch pipe inlet baffle being 3-5mm.
[0010] Furthermore, the guide vane has a height of 6-10 mm and a pitch of 550-600 mm.
[0011] Furthermore, the inner wall surface of the top socket near the horizontal branch pipe is a guide arc used to slow down the flow velocity of the water coming down from the upper drainage riser.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0013] 1) Compared with traditional special single-pipe fittings, the special fittings of this utility model construct a gas passage, solve the exhaust problem, and make the water flow smoothly;
[0014] 2) Combining finite element fluid simulation analysis and actual experiments, the design of this utility model of special single riser pipe fitting with increased gas passage can reduce the pressure fluctuation of horizontal branch pipe by about 5-15%, which indirectly increases the system flow rate.
[0015] 3) This utility model features a special single-pipe fitting with a reasonable structural design, good air permeability, and smooth water flow. Attached Figure Description
[0016] Figure 1 This is a perspective view of the pipe fitting of this utility model;
[0017] Figure 2 This is a top view of the pipe fitting of this utility model;
[0018] Figure 3 This is the main view of the pipe fitting of this utility model;
[0019] Figure 4 for Figure 3 Cross-sectional view at point AA.
[0020] In the diagram: 1. Top socket; 2. Middle expansion; 3. Middle reduction; 4. Bottom socket; 5. Horizontal branch inlet; 6. Middle guide vane; 7. Horizontal branch inlet baffle; 8. Guide arc; 9. Ventilation branch. Detailed Implementation
[0021] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the scope described herein.
[0022] Please refer to Figure 1-4As shown, a special single-pipe fitting with a venting branch pipe includes a vertical pipe body connecting to the drainage riser and a horizontal branch pipe 5 connecting to the drainage equipment. The vertical pipe body includes a top socket 1, a middle expansion section 2, a middle reduction section 3, and a bottom socket 4.
[0023] The top socket 1 is mainly connected to the upper drainage riser; the middle expansion section 2 is used to increase the water flow cross-section, leaving sufficient water and air channels to prevent water jets; the middle reduction section 3 is used to close the water flow from the upper end and the horizontal branch pipe 5, forming a wall-attached swirling flow state and constructing a central gas passage. The bottom socket 4 is mainly connected to the lower drainage riser, and can be done in various ways.
[0024] The top socket 1 is located at the upper end of the middle expansion section 2, the middle reduction section 3 is located below the middle expansion section 2, the bottom socket 4 is located at the bottom of the middle reduction section 3, and the middle guide vane 6 is installed inside the middle reduction section 3, which mainly plays the role of forming wall-attached swirl. The guide vane 6 has a height of 6-10mm and a pitch of 550-600mm.
[0025] The horizontal branch pipe 5 inlet is mainly connected to the drainage equipment on this floor, allowing it to enter the hydrocyclone body tangentially.
[0026] Under actual high flow conditions, the gas passage from the horizontal branch pipe 5 to the top socket 1 may be temporarily filled with water, a phenomenon known as a water plug. A vent branch pipe 9 is installed on the upper surface of the horizontal branch pipe 5 to significantly reduce turbulence caused by poor water-air circulation, thereby increasing the drainage flow. The vent branch pipe 9 is connected to both the horizontal branch pipe 5 and the top socket 1. Specifically, to avoid siphoning, the inner diameter of the vent branch pipe is 3-6 mm.
[0027] Since the water flow in the middle expansion section 2 is counterclockwise tangential, a horizontal branch pipe inlet baffle 7 with a vertical wall is provided at the inlet of the horizontal branch pipe. The height of the horizontal branch pipe inlet baffle 7 is 3-5mm.
[0028] The inner wall surface of the top socket 1 near the horizontal branch pipe is a guide arc 8, which slows down the water flow speed from the upper drainage riser and directs the water flow to the wall surface of the middle expansion section 2, freeing up space for the gas passage.
Claims
1. A special single riser fitting with a venting branch pipe, comprising a vertical pipe body connecting to a drainage riser and a horizontal branch pipe (5) connecting to a drainage device, characterized in that: The vertical pipe body includes a top socket (1), a middle expansion section (2), a middle reduction section (3) and a bottom socket (4). The top socket (1) is located at the upper end of the middle expansion section (2), the middle reduction section (3) is located below the middle expansion section (2), and the bottom socket (4) is located at the bottom of the middle reduction section (3). A middle guide vane (6) is installed inside the middle reduction section (3).
2. A special single riser fitting with a vent branch pipe according to claim 1, characterized in that: A ventilation branch pipe (9) is installed on the upper surface of the horizontal branch pipe (5), and the ventilation branch pipe (9) is connected to the horizontal branch pipe (5) and the top socket (1).
3. A special single riser fitting with a vent branch pipe according to claim 2, characterized in that: The inner diameter of the ventilation branch pipe is 3-6 mm.
4. A special single riser fitting with a vent branch pipe according to claim 1 or 2, characterized in that: The horizontal branch pipe (5) is provided with a horizontal branch pipe inlet baffle (7) with a vertical wall surface at the water inlet, and the height of the horizontal branch pipe inlet baffle (7) is 3-5mm.
5. A special single riser fitting with a vent branch pipe according to claim 1, characterized in that: The guide vane (6) has a height of 6-10 mm and a pitch of 550-600 mm.
6. A special single riser fitting with a vent branch pipe according to claim 1, characterized in that: The inner wall surface of the top socket (1) near the horizontal branch pipe is a guide arc (8) used to slow down the flow velocity of the water coming down from the upper drainage riser.