Tee joint for ventilation drainage system
By designing a tee with a two-stage speed reduction structure in the ventilation and drainage system, the problem of drainage water flowing into the ventilation riser is solved, and free airflow in the ventilation duct and smooth airflow in the drainage riser are achieved, reducing pressure fluctuations in the drainage riser.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA ARCHITECTURE DESIGN & RES GRP CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-19
AI Technical Summary
In existing ventilation and drainage systems, the tee fittings connecting the drainage riser and the ventilation riser cause drainage water to flow into the ventilation riser, affecting the system's ventilation performance.
Design a tee for a ventilated drainage system, comprising a vertical pipe and an inclined pipe. The inclined pipe has a two-stage speed-reducing structure, including a concave surface and a conical cylindrical structure, to reduce the water flow velocity and prevent backflow into the ventilated vertical pipe.
It effectively prevents water from flowing back into the venting riser, ensures free airflow in the venting pipe, promotes smooth airflow in the drainage riser, and reduces pressure fluctuations in the drainage riser.
Smart Images
Figure CN224259517U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of building indoor drainage technology, and specifically relates to a tee for a ventilation drainage system. Background Technology
[0002] The dedicated ventilation system consists of a drainage riser and a ventilation riser. Existing tee fittings for dedicated ventilation and drainage systems, connecting the ventilation and drainage risers, have smooth inner walls and are of equal diameter. However, in full-scale experiments, it was found that water from the upper drainage system would flow through the tee at the base of the riser into the ventilation riser, obstructing the ventilation pipe and affecting the system's ventilation efficiency. Utility Model Content
[0003] In view of the above analysis, the present invention aims to provide a tee for a ventilation and drainage system to solve the above-mentioned problems existing in the prior art.
[0004] The purpose of this utility model is achieved as follows:
[0005] A tee for a ventilated drainage system, comprising:
[0006] A vertical pipe has an inlet port and an outlet port, wherein the inlet port and the outlet port are sealed and connected to a drainage vertical pipe;
[0007] An inclined tube is arranged at an upward angle, with its bottom end integrally connected to the side wall of the vertical tube, and its top end sealed to the ventilation riser.
[0008] The inclined tube is provided with a first deceleration structure and a second deceleration structure inside; along the flow direction of water into the inclined tube, the first deceleration structure is located upstream of the second deceleration structure, and the first deceleration structure and the second deceleration structure are configured to reduce the flow velocity of water entering the inclined tube from the vertical tube in two successive steps.
[0009] Furthermore, quick-connect interfaces are provided at the top and bottom openings of the vertical pipe and the top opening of the inclined pipe, through which drainage risers and ventilation risers are connected.
[0010] Furthermore, the axis of the inclined tube forms a 45° angle with the axis of the vertical tube.
[0011] Furthermore, the first speed-reducing structure is disposed on the bottom inner wall surface of the inclined tube and is located below the axis of the inclined tube; the first speed-reducing structure has a concave surface, which constitutes part of the inner wall surface of the inclined tube.
[0012] Furthermore, the second deceleration structure is disposed on the upper inner wall surface of the inclined tube; the second deceleration structure has a protruding structure, which is arranged in a ring on the upper inner wall surface of the inclined tube.
[0013] Furthermore, the protruding structure is a convex ring, which is disposed on the inner wall surface of the inclined tube.
[0014] Furthermore, the convex ring is a conical cylindrical structure with openings at both ends.
[0015] Furthermore, the conical cylindrical structure has a top conical opening and a bottom conical opening. The top conical opening is connected to the upper inner wall surface of the inclined tube. The diameter of the bottom conical opening is smaller than the diameter of the top conical opening, and the bottom conical opening is located below the top conical opening.
[0016] Furthermore, the axis of the conical cylindrical structure coincides with the axis of the inclined tube.
[0017] Furthermore, the conical cylindrical structure has an inner conical surface and an outer conical surface, and the generatrix of the outer conical surface forms a 45° angle with the axis of the inclined tube.
[0018] Compared with the prior art, the tee for the ventilation and drainage system provided by this utility model is an anti-backflow tee. By setting a two-stage speed reduction structure to reduce the water flow velocity, it can prevent the water at the root of the drainage riser from flowing back into the ventilation pipe due to bottom positive pressure or natural downward flow, thus ensuring the free flow of air in the ventilation pipe. Moreover, after the air flow in the ventilation pipe is smooth, it will further promote the smooth flow of air in the drainage riser, ensure the normal operation of the air core, and reduce pressure fluctuations in the drainage riser. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings.
[0020] Figure 1 A cross-sectional structural diagram of a tee for a ventilation and drainage system provided by this utility model;
[0021] Figure 2 A schematic diagram of the structure of a tee for a ventilation and drainage system provided by this utility model;
[0022] Figure 3 A schematic diagram of the internal structure of a tee for a ventilation and drainage system provided by this utility model;
[0023] Figure 4 for Figure 3 Enlarged view of region A in the middle;
[0024] Figure 5 This is a schematic diagram of the conical cylindrical structure provided by this utility model.
[0025] Figure label:
[0026] 1-Vertical pipe; 11-Inlet port; 12-Outlet port;
[0027] 2- Inclined tube; 21. Concave surface; 22. Conical cylindrical structure; 221. Top conical opening; 222. Bottom conical opening; 223. Outer conical surface;
[0028] 3- Quick-connect interface. Detailed Implementation
[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. It should be noted that, unless otherwise specified, the implementation methods and features in the implementation methods in this disclosure can be combined, separated, interchanged, and / or rearranged. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0030] In the accompanying drawings, the dimensions and relative dimensions of components may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, a specific process sequence may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Furthermore, the same reference numerals denote the same components.
[0031] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent biases in measurements, calculated values, and / or provided values that would be recognized by one of ordinary skill in the art.
[0032] Example 1
[0033] A specific embodiment of this utility model discloses a tee for a ventilation and drainage system, used for connecting the root of the drainage riser to the root of the ventilation riser.
[0034] like Figures 1 to 5 As shown, the tee for the ventilation and drainage system includes:
[0035] Vertical pipe 1, the top end of the vertical pipe 1 is the water inlet port 11, the bottom end of the vertical pipe 1 is the water outlet port 12, the water inlet port 11 and the water outlet port 12 are sealed and connected to the drainage riser.
[0036] An inclined tube 2 is connected to the side wall of the vertical tube 1 and is connected to the ventilation riser. Specifically, the inclined tube 2 is arranged inclined upwards, the bottom end of the inclined tube 2 is integrally connected to the side wall of the vertical tube 1, and the top end of the inclined tube 2 is sealed to the ventilation riser.
[0037] The inclined tube 2 is equipped with a speed-reducing structure inside, which is configured to reduce the flow velocity of the water entering the inclined tube 2 from the vertical tube 1.
[0038] When water in the drainage riser flows into the inclined pipe 2 through the riser 1, the inclined pipe 2 has a speed-reducing structure inside. This speed-reducing structure can reduce the flow velocity of the water entering the inclined pipe 2, thereby reducing the flow velocity of the water flowing into the ventilator riser. This can prevent water from flowing into the ventilator riser and occupying the ventilator pipe, thus ensuring the ventilation effect of the system.
[0039] Optionally, the axis of the inclined tube 2 forms a 45° angle with the axis of the vertical tube 1.
[0040] In one optional embodiment, the deceleration structure includes a first deceleration structure disposed on the bottom inner wall surface of the inclined pipe 2 and located below the axis of the inclined pipe 2; the first deceleration structure has a concave surface 21, which forms part of the inner wall surface of the inclined pipe 2. In other words, this embodiment achieves a localized enlargement of the water flow cross-section by providing a first deceleration structure with a concave surface 21 on the bottom inner wall of the inclined pipe 2 of the anti-backflow tee, thereby reducing the flow velocity of the water entering the inclined pipe 2.
[0041] In one optional embodiment, to further reduce the flow velocity, the deceleration structure further includes a second deceleration structure, which is disposed on the upper inner wall surface of the inclined tube 2. The second deceleration structure has a protruding structure, which is arranged in a ring on the upper inner wall surface of the inclined tube 2. After the water flow undergoes initial deceleration through the concave surface 21, a portion of the water flow still tends to continue flowing upward along the inclined tube 2. When the water flow encounters the protruding structure after the initial deceleration, the protruding structure further reduces the flow potential energy of the water flow, thereby achieving two consecutive decelerations of the water flow. The water flow deceleration effect is better, further improving the ventilation effect of the system.
[0042] For example, the protruding structure is a convex ring, which is disposed on the inner wall surface of the inclined pipe 2. Specifically, the convex ring is a conical cylindrical structure 22 with openings at both ends. One end of the conical cylindrical structure 22 has a large opening, and the other end has a small opening, which is arranged obliquely downwards. The diameter of the bottom port of the convex ring is smaller than the diameter of the top port of the convex ring. That is, the conical cylindrical structure 22 has a top conical opening 221 and a bottom conical opening 222. The top conical opening 221 is connected to the upper inner wall surface of the inclined pipe 2, and the diameter of the bottom conical opening 222 is smaller than the diameter of the top conical opening 221. The bottom conical opening 222 is located below the top conical opening 221. This structural arrangement not only further reduces the water flow velocity but also helps to accelerate the flow of water in the inclined pipe 2 back to the drainage riser.
[0043] Preferably, the axis of the conical cylindrical structure 22 coincides with the axis of the inclined tube 2.
[0044] In one alternative embodiment, a gap exists between the outer conical surface 223 of the conical cylindrical structure 22 and the inner wall surface of the inclined pipe 2. Optionally, the protruding structure is set at a 45° angle, which facilitates water flow guidance and return to the drainage riser. That is, the conical cylindrical structure 22 has an inner conical surface and an outer conical surface 223, and the generatrix of the outer conical surface 223 forms a 45° angle with the axis of the inclined pipe 2.
[0045] In one alternative embodiment, the diameter of the plurality of protruding bottom conical openings 222 gradually decreases from the bottom opening of the inclined tube 2 to the top opening of the inclined tube 2. This can also be understood as the height of the protrusions inside the inclined tube 2 gradually increasing along the direction from the drainage riser to the ventilation riser. Here, the height refers to the distance between the edge of the bottom conical opening 222 of the conical cylindrical structure 22 and the inner wall surface of the inclined tube 2. For example, the height of the protrusions gradually increases from 3mm to 11mm, and can be set in an arithmetic progression. The inner diameter of the inclined tube 2 can be selected according to the specific application scenario and relevant specifications; for example, the inner diameter of the inclined tube 2 can be 75-100mm.
[0046] In this embodiment, to achieve quick assembly and disassembly, quick-connect interfaces 3 are provided at both the top and bottom ends of the vertical pipe 1; correspondingly, a quick-connect interface 3 is also provided at the top end of the inclined pipe 2. The drainage riser and ventilation riser are connected through the quick-connect interfaces 3. A circular sealing ring, using a threaded ring, is provided in the quick-connect interface 3; simply tightening it completes the airtight connection.
[0047] Compared with the prior art, the tee for the ventilated drainage system provided in this embodiment, when backflow occurs, allows water to flow through the concave surface of the first deceleration structure as it flows into the ventilated riser. Due to the expansion of the water flow cross-section, the flow velocity of the water entering the inclined pipe can be rapidly reduced. Then, through the different height protrusions of the second deceleration structure set on the inner wall of the inclined pipe, with the height of the protrusions gradually increasing from 3mm to 11mm, not only can the flow velocity in the inclined pipe be rapidly reduced, but the water flow can also be guided and returned to the drainage riser. In summary, the tee for the ventilated drainage system of this application, by setting a two-stage deceleration structure, can prevent water at the root of the drainage riser from flowing back into the ventilated pipe due to bottom positive pressure or natural downward flow. It can ensure the free flow of air in the ventilated pipe, and after the air flow in the ventilated pipe is smooth, it will further promote the smooth flow of air in the drainage riser, ensure the normal operation of the air core, and reduce pressure fluctuations in the drainage riser.
[0048] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above description is only a specific embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.
Claims
1. A tee for a ventilated drainage system, characterized in that, include: A vertical pipe has an inlet port and an outlet port, wherein the inlet port and the outlet port are sealed and connected to a drainage vertical pipe; An inclined tube is arranged at an upward angle, with its bottom end integrally connected to the side wall of the vertical tube, and its top end sealed to the ventilation riser. The inclined tube is provided with a first speed-reducing structure and a second speed-reducing structure inside; Along the direction of water flow into the inclined pipe, the first deceleration structure is located upstream of the second deceleration structure. The first and second deceleration structures are configured to reduce the flow velocity of the water entering the inclined pipe from the vertical pipe in two successive steps.
2. The tee for a ventilated drainage system according to claim 1, characterized in that, The top and bottom openings of the vertical pipe, as well as the top opening of the inclined pipe, are all equipped with quick-connect interfaces, which are used to connect to the drainage riser and the vent riser.
3. The tee for a ventilated drainage system according to claim 1, characterized in that, The axis of the inclined tube forms a 45° angle with the axis of the vertical tube.
4. The tee for a ventilated drainage system according to claim 1, characterized in that, The first speed-reducing structure is disposed on the bottom inner wall surface of the inclined tube and is located below the axis of the inclined tube; the first speed-reducing structure has a concave surface, which forms part of the inner wall surface of the inclined tube.
5. The tee for a ventilated drainage system according to claim 4, characterized in that, The second speed-reducing structure is disposed on the upper inner wall surface of the inclined tube; the second speed-reducing structure has a protruding structure, which is arranged in a ring on the upper inner wall surface of the inclined tube.
6. The tee for a ventilated drainage system according to claim 5, characterized in that, The protruding structure is a convex ring, which is located on the inner wall surface of the inclined tube.
7. The tee for a ventilated drainage system according to claim 6, characterized in that, The convex ring is a conical cylindrical structure with openings at both ends.
8. The tee for a ventilated drainage system according to claim 7, characterized in that, The conical cylindrical structure has a top conical opening and a bottom conical opening. The top conical opening is connected to the upper inner wall of the inclined tube. The diameter of the bottom conical opening is smaller than that of the top conical opening, and the bottom conical opening is located below the top conical opening.
9. The tee for a ventilated drainage system according to claim 8, characterized in that, The axis of the conical cylindrical structure coincides with the axis of the inclined tube.
10. The tee for a ventilated drainage system according to claim 9, characterized in that, The conical cylindrical structure has an inner conical surface and an outer conical surface, and the generatrix of the outer conical surface forms a 45° angle with the axis of the inclined tube.