Building water supply dynamic circulation valve based on venturi effect
Patent Information
- Application Number
- CN202522098972.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-29
- Publication Date
- 2026-09-08
- Estimated Expiration
- 2035-09-29
AI Technical Summary
[0007]但是目前塑料管道尚无配套系统及配套管件，一般传统建筑给水系统中，支路循环常依赖水泵强制循环或机械式平衡阀，存在以下缺陷：
[0019] In this utility model, based on structural design such as negative pressure structure, self-drive is achieved by using fluid kinetic energy to realize dynamic distribution control of the flow of the main pipe and branch pipes without the need for external energy; the branch pipes always have a certain amount of circulating flow to prevent bacterial growth; and based on the flow adaptive distribution design, the response time is short and the accuracy is high; the whole valve body can be integrally injection molded by PPR and can be directly heat-fused and welded to PPR pipes to reduce the risk of water leakage.
Smart Images
Figure CN224730188U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of water supply system technology, specifically relating to a dynamic circulation valve for building water supply based on the Venturi effect. Background Technology
[0002] Traditional PP-R pipes use a branched pipe layout, with each branch independent and unaffected by others. This leads to prolonged water stagnation at less frequently used points, increasing dissolved oxygen levels and creating a breeding ground for bacteria, contaminating household water. This "dead water" contaminates the entire house's plumbing, especially in complex layouts like large apartments and villas, potentially causing adverse effects on occupants the next time the water is used. Stagnant water can also breed Legionella and other bacteria, posing a health risk. Legionella growth depends on three main factors:
[0003] 1) Water that has been stagnant for a long time (water that has been stagnant for more than 3 days);
[0004] 2) The suitable temperature is between 20℃ and 55℃; (with the optimal growth range being between 35℃ and 45℃).
[0005] 3) Nutrients in water.
[0006] In response to the proliferation and harm caused by Legionella, stagnant water leads to the formation of biofilm inside pipes. As a result, in recent years, manufacturers of stainless steel pipes and copper pipes have proposed the concept of "living water". The system uses stainless steel pipes and copper pipes to achieve active water flow throughout the pipeline, which has a considerable market capacity.
[0007] However, currently there are no supporting systems or fittings for plastic pipes. In traditional building water supply systems, branch circulation often relies on water pumps for forced circulation or mechanical balancing valves, which has the following drawbacks:
[0008] Stagnant water in branch lines: When the water point is closed, the water flow in the branch line stops, which can lead to the growth of bacteria (such as Legionella).
[0009] Energy waste: The water pump runs at full load continuously;
[0010] Regulation lag: Mechanical valves require manual adjustment and cannot respond to flow changes in real time. Utility Model Content
[0011] To address the aforementioned problems in the existing technology, the purpose of this utility model is to provide a dynamic circulation valve for building water supply based on the Venturi effect, a control valve that realizes dynamic distribution of flow between the main pipe and branch pipes, and is applicable to scenarios such as domestic water circulation systems.
[0012] This utility model provides the following technical solution: a dynamic circulation valve for building water supply based on the Venturi effect, including a valve body, which is a pipeline structure. The valve body has a main pipe inlet and a main pipe outlet at both ends. The valve body has a first branch pipe interface and a second branch pipe interface on its side. The valve body forms a pressure chamber inside. The pressure chamber is divided into an upper chamber and a lower chamber by a negative pressure structure. The upper chamber is connected to the main pipe outlet, and the lower chamber is connected to the main pipe inlet.
[0013] Furthermore, the negative pressure structure includes a constricted inlet section and a throat communicating with the inlet section. The inlet section communicates with the lower cavity, and the throat communicates with the upper cavity.
[0014] Furthermore, the inlet section has a conical structure, and its diameter gradually decreases along the direction of water flow.
[0015] Furthermore, the throat is a straight tube structure, and its inner diameter is equal to the inner diameter of the smaller end of the inlet section.
[0016] Furthermore, the first branch pipe interface is located near the main pipe inlet and communicates with the lower cavity.
[0017] Furthermore, the second branch pipe interface is located near the main pipe outlet and is connected to the upper cavity.
[0018] By adopting the above-mentioned technology, the beneficial effects of this utility model compared with the prior art are as follows:
[0019] In this utility model, based on structural design such as negative pressure structure, self-drive is achieved by using fluid kinetic energy to realize dynamic distribution control of the flow of the main pipe and branch pipes without the need for external energy; the branch pipes always have a certain amount of circulating flow to prevent bacterial growth; and based on the flow adaptive distribution design, the response time is short and the accuracy is high; the whole valve body can be integrally injection molded by PPR and can be directly heat-fused and welded to PPR pipes to reduce the risk of water leakage. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0021] Figure 2 This is a schematic diagram of flow distribution under one working condition in an embodiment of the present utility model;
[0022] Figure 3 This is a schematic diagram of flow distribution under another operating condition in an embodiment of this utility model. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.
[0024] Conversely, this utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model as defined in the claims. Furthermore, to provide the public with a better understanding of this utility model, certain specific details are described in detail in the following description. However, those skilled in the art will fully understand this utility model even without these detailed descriptions.
[0025] Please see Figure 1 A dynamic circulation valve for building water supply based on the Venturi effect includes a valve body, which is a pipeline structure with a pressure chamber inside. The valve body has a main inlet 1 and a main outlet 5 at both ends. Two branch interfaces are connected to the side, namely a first branch interface 6 and a second branch interface 7. A negative pressure structure is provided in the pressure chamber near the main outlet 5. The pressure chamber is divided into an upper chamber and a lower chamber by the negative pressure structure. The lower chamber is connected to the main inlet 1 and the upper chamber is connected to the main outlet 5.
[0026] Specifically, the negative pressure structure is fixed inside the pressure chamber, including the inlet section 3 and the throat 4. The inlet section 3 is a conical constricted structure that communicates with the lower cavity; the throat 4 is a straight tube structure that extends outward from the smaller end of the inlet section 3 and communicates with the upper cavity.
[0027] The valve body can be integrally injection molded with PPR and can be directly heat-fused and welded to PPR pipes.
[0028] In this embodiment, the circulating valve achieves adaptive flow distribution by creating a negative pressure effect through a venturi neck. The valve body is designed with a precise necking-expansion flow channel. As water flows through: Inlet section: Water enters a gradually narrowing conical section. Throat: Water flows through the narrowest section, where the flow velocity reaches its maximum. Outlet section: Water enters the larger upper chamber, where the velocity decreases and the pressure partially recovers.
[0029] The working process of the circulation valve in this embodiment is as follows:
[0030] Operating Condition 1: Branch lines have no water demand, such as Figure 2 As shown.
[0031] When the water supply unit downstream of the Venturi main outlet is in use, drinking water enters from the main inlet. When the flow rate of drinking water in the main is low, the dynamic Venturi structure remains almost unchanged. Most of the flow is supplied to the water supply unit downstream of the main through the branch pipes, while a small portion of the flow is supplied to the water supply unit downstream of the main through the dynamic Venturi structure along with the water flow in the branch pipes. This avoids the stagnation of drinking water, the growth of bacteria, and maintains a lower drinking water temperature. At this time:
[0032] The main flow rate is ≥80% of the design flow rate, which causes high-speed flow at the venturi throat to generate strong negative pressure;
[0033] When the pressure in the upper chamber is less than the pressure in the lower chamber, 80% of the flow goes through the main pipe, and 20% of the flow circulates through the branch pipes to prevent stagnation.
[0034] Operating Condition 2: The branch line starts water supply at the point, such as... Figure 3 As shown.
[0035] When a water user downstream of the Venturi main outlet uses the system, drinking water enters from the main inlet. As the flow rate of drinking water in the main increases, the dynamic Venturi structure opens at the required pressure, and most of the flow is supplied to the downstream water user through the super Venturi main channel. At this time, most of the water flows through the dynamic Venturi structure, where the cross-sectional area narrows, the flow velocity increases, and a low-pressure state is created. This absorbs unused drinking water from the branch pipes, forming a small portion of the flow that enters the super Venturi and is supplied to the downstream water user along with the main flow, thus achieving water exchange of the drinking water in the branch pipes.
[0036] The use of water in the branch line caused a sharp drop in the flow rate of the main pipe, which weakened the negative pressure at the throat of the Venturi tube.
[0037] When the pressure in the upper chamber increases, 80% of the flow goes to the branch, and 20% of the flow maintains the basic flow in the main pipe.
[0038] Operating Condition 3:
[0039] When a water user in a Venturi branch loop uses the water, drinking water enters from the main pipe inlet. When the dynamic Venturi structure reaches the opening pressure, the water flow is diverted to the two branches of the super Venturi and supplied to the water user in the loop, thus realizing the water exchange of drinking water in the branch pipe.
[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A dynamic circulation valve for building water supply based on the Venturi effect, characterized in that, Includes a valve body, which is a pipeline structure. The valve body has a main pipe inlet (1) and a main pipe outlet (5) at both ends. The valve body has a first branch pipe interface (6) and a second branch pipe interface (7) on its side. The valve body has a pressure chamber inside. The pressure chamber is divided into an upper chamber and a lower chamber by a negative pressure structure. The upper chamber is connected to the main pipe outlet (5), and the lower chamber is connected to the main pipe inlet (1).
2. The building water supply dynamic circulation valve based on the Venturi effect according to claim 1, characterized in that, The negative pressure structure includes a constricted inlet section (3) and a throat (4) connected to the inlet section (3). The inlet section (3) is connected to the lower cavity, and the throat (4) is connected to the upper cavity.
3. A dynamic circulation valve for building water supply based on the Venturi effect according to claim 2, characterized in that, The inlet section (3) is a conical structure with its diameter gradually decreasing along the direction of water flow.
4. A dynamic circulation valve for building water supply based on the Venturi effect according to claim 3, characterized in that, The throat (4) is a straight tube structure, and its inner diameter is equal to the inner diameter of the smaller end of the inlet section (3).
5. A dynamic circulation valve for building water supply based on the Venturi effect according to claim 1, characterized in that, The first branch pipe interface (6) is located near the main pipe inlet (1) and is connected to the lower cavity.
6. A dynamic circulation valve for building water supply based on the Venturi effect according to claim 5, characterized in that, The second branch pipe interface (7) is located near the main pipe outlet (5) and is connected to the upper cavity.