Building water supply vertical pipe automatic flushing system based on variable frequency water supply
By introducing a drain pipe and an electrical signal control valve into the variable frequency water supply system, combined with a dosing tank and a stirring device, the problems of impurity deposition in the riser and difficulty in discharging flushing wastewater were solved, achieving efficient flushing of the water supply riser and improvement of water quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI NATIONAL ENGINEERING RESEARCH CENTER OF URBAN WATER RESOURCES CO LTD
- Filing Date
- 2025-09-01
- Publication Date
- 2026-07-21
AI Technical Summary
In existing variable frequency water supply systems, the building water supply main pipes lack dedicated drain outlets, leading to the accumulation of impurities in the risers, affecting the water quality, and making it difficult to discharge flushing wastewater.
Design an automatic flushing system for building water supply risers based on variable frequency water supply. By connecting a drain pipe to the side of the riser, and using an electrical signal control valve and a variable frequency water pump to achieve high-speed water flow flushing, the wastewater is discharged through the drain pipe. At the same time, a dosing tank and a stirring device ensure uniform mixing of disinfectant and water, and a filter box and a water storage tank are used to neutralize unused disinfectant.
It effectively prevents impurities from accumulating, improves water quality, ensures flushing effectiveness, reduces environmental pollution, and lowers maintenance costs.
Smart Images
Figure CN224531802U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building water supply and drainage engineering technology, specifically to an automatic flushing system for building water supply risers based on variable frequency water supply. Background Technology
[0002] In building water supply and drainage systems, variable frequency water supply technology is widely used due to its advantages such as energy saving and stability. However, in existing variable frequency water supply systems, the building water supply trunk lines are usually branched and do not have drainage outlets. After long-term operation, sediment, particulate matter and other impurities are easily deposited in the risers, affecting the water quality.
[0003] In existing technologies, the lack of dedicated drainage pipes for risers makes it difficult to discharge flushing wastewater, affecting users' normal water use. Therefore, there is an urgent need for a high-quality water supply system that can optimize riser flushing functionality during the design phase. Utility Model Content
[0004] The purpose of this invention is to provide an automatic flushing system for building water supply risers based on variable frequency water supply, in which wastewater generated from flushing the water supply risers can be discharged through a drain pipe, thereby solving the defects mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: An automatic flushing system for building water supply risers based on variable frequency water supply includes a vertically extending water supply riser, several water supply branch pipes connected to the side of the water supply riser, a water supply pipe connected to the lower end of the water supply riser, a drain pipe connected to one side of the upper end of the water supply riser, and an electrical signal control valve installed on both the water supply branch pipes and the drain pipe.
[0006] As a further improvement, an air vent valve is installed at the upper end of the water supply riser.
[0007] As a further improvement, it also includes an inlet pipe, a dosing tank, and an outlet pipe connected in sequence. The inlet end of the inlet pipe and the outlet end of the outlet pipe are both connected to the water supply pipe, and the dosing tank is connected to a disinfectant dosing pipe.
[0008] As a further improvement, the outlet end of the water outlet pipe is connected to the water outlet pipe located downstream of the water inlet pipe. Branch pipe valves are installed on the water inlet pipe and the water outlet pipe respectively, and a main pipe valve is installed on the water supply pipe located between the water inlet pipe and the water outlet pipe.
[0009] As a further improvement, a vertically extending hollow tube is rotatably installed on the top wall of the dosing tank. The upper end of the hollow tube extends out of the outside of the dosing tank and is rotatably connected to the disinfectant adding tube. A stirring tube located inside the dosing tank is fixedly installed at the lower end of the hollow tube. The stirring tube is connected to the inner cavity of the hollow tube and has a drug outlet hole.
[0010] As a further improvement, a horizontally arranged baffle is fixedly installed inside the dosing tank. The baffle is located between the water outlet end of the water inlet pipe and the water inlet end of the water outlet pipe. The baffle is provided with a vertically penetrating liquid passage hole. The hollow tube is coaxially arranged with the liquid passage hole, and the lower end of the hollow tube extends into the liquid passage hole and is fixedly installed with an impeller.
[0011] As a further improvement, the outlet end of the drain pipe is connected to a filter box, the filter box is connected to a water storage tank, and the water storage tank is equipped with a neutralizing agent addition pipe.
[0012] As a further improvement, a stirrer is also installed inside the water storage tank.
[0013] As a further improvement, a drain pipe is connected to one side of the bottom of the water storage tank, and a drain valve is installed on the drain pipe.
[0014] As a further improvement, a drain pipe is connected to the bottom of the water storage tank, and a drain valve is installed on the drain pipe.
[0015] Compared with the prior art, the beneficial effects of this utility model are: 1. When flushing the water supply riser, close the electrical signal control valve on the water supply branch pipe and open the electrical signal control valve on the drain pipe. The high-speed water flow flushes the inner wall of the water supply riser, and the wastewater generated from flushing the water supply riser is discharged through the drain pipe, thereby preventing impurities from accumulating in the water supply riser and improving the water supply quality. 2. When flushing the water supply riser, the main pipe valve is closed, and the branch pipe valves on the inlet and outlet pipes are opened. The water flows through the dosing tank and carries the disinfectant into the water supply riser, which makes the flushing effect of the water supply riser better. 3. When the water flows through the liquid passage, it impacts the impeller and drives the hollow tube to rotate. The hollow tube drives the stirring tube to stir the water in the dosing tank. At the same time, the disinfectant is discharged through the outlet hole on the stirring tube, so that the disinfectant and water are mixed more evenly. 4. Wastewater generated from flushing the water supply riser is filtered by the filter box and then temporarily stored in the storage tank. Neutralizing agent is added to the storage tank through the neutralizing agent addition pipe to neutralize the disinfectant in the wastewater that has not been completely consumed, thereby preventing the direct discharge of chlorine-containing wastewater from affecting the surrounding environment. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of Embodiment 2 of this utility model; Figure 3 This is a schematic diagram of the dosing tank of Embodiment 2 of this utility model.
[0018] In the diagram: 1-Water supply riser; 2-Water supply branch pipe; 3-Water supply pipe; 4-Main valve; 5-Drain pipe; 6-Electrical signal control valve; 7-Air vent valve; 8-Inlet pipe; 9-Dosing tank; 10-Outlet pipe; 11-Disinfectant addition pipe; 12-Branch pipe valve; 13-Hollow pipe; 14-Agitator pipe; 15-Discharge port; 16-Baffle plate; 17-Liquid passage; 18-Impeller; 19-Filter box; 20-Water storage tank; 21-Neutralizing agent addition pipe; 22-Agitator; 23-Discharge pipe; 24-Discharge valve; 25-Sewage pipe; 26-Sewage valve; 27-Main pipe valve. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] Example 1: like Figure 1As shown, an automatic flushing system for building water supply risers based on variable frequency water supply includes a vertically extending water supply riser 1. Several water supply branch pipes 2 are connected to the side of the water supply riser 1, and the branch pipes 2 supply water to different floors respectively. The lower end of the water supply riser 1 is connected to a water supply pipe 3, and the inlet end of the water supply pipe 3 is connected to a variable frequency water pump. A main valve 4 is installed on the water supply pipe 3. A drain pipe 5 is connected to one side of the upper end of the water supply riser 1. The diameter of the drain pipe 5 should be 1 / 2 to 2 / 3 of the maximum diameter of the water supply riser 1 to ensure smooth drainage. The outlet end of the drain pipe 5 extends downward and indirectly discharges to a collection well or outdoor drainage system to avoid wastewater generated from flushing the water supply riser 1 being directly discharged to the ground. An electrical signal control valve 6 is installed on both the water supply branch pipes 2 and the drain pipe 5. The electrical signal control valve 6 is made of pressure-resistant and corrosion-resistant materials, such as stainless steel or copper alloy. The valve body should have a fast opening and closing function with a response time of ≤1 second.
[0021] During normal water supply, the electrical signal control valve 6 on the water supply branch pipe 2 is opened, and the electrical signal control valve 6 on the drain pipe 5 is closed, allowing water to flow through the water supply riser 1 to supply the water supply branch pipe 2.
[0022] When flushing the water supply riser 1, close the electro-signal control valves 6 on all water supply branch pipes 2 to block water supply to the user end, open the electro-signal control valve 6 on the drain pipe 5, and switch the variable frequency water pump connected to the water supply pipe 3 to a low flow rate, high head mode to flush the inner wall of the water supply riser 1 with high-speed water flow; the wastewater generated from flushing the water supply riser 1 is indirectly discharged to the collection well or outdoor drainage system through the drain pipe 5 to avoid secondary pollution. After flushing the water supply riser 1 is completed, the electro-signal control valves 6 on all water supply branch pipes 2 are reopened, and the electro-signal control valve 6 on the drain pipe 5 is closed, returning to normal water supply mode.
[0023] In addition, the electrical signal control valves 6 on the water supply branch pipe 2 and the drainage pipe 5 are connected to the building automation system to enable the flushing function of the water supply riser 1 at regular intervals, reducing maintenance costs. This is typically done during low water usage periods at night to minimize disruption to users. The flushing frequency of the water supply riser 1 can be dynamically adjusted based on water quality monitoring data; an initial setting of once a month is recommended. When flushing the water supply riser 1, the head of the variable frequency pump is increased to 1.2–1.5 times the design value, and the flow rate is reduced to 30%–50% to ensure sufficient flushing force.
[0024] An air vent valve 7 is installed at the upper end of the water supply riser 1. The air vent valve 7 is an automatic air vent valve, which can automatically vent air after the water supply riser 1 is flushed to avoid cavitation.
[0025] Example 2: like Figure 2 and Figure 3As shown, the difference between this embodiment and Embodiment 1 is that it also includes an inlet pipe 8, a dosing tank 9, and an outlet pipe 10 connected in sequence; the inlet end of the inlet pipe 8 is connected to the water supply pipe 3 downstream of the main valve 4, and the outlet end is connected to the lower side of the dosing tank 9; the inlet end of the outlet pipe 10 is connected to the upper side of the dosing tank 9, and the outlet end is connected to the water supply pipe 3 downstream of the inlet pipe 8.
[0026] The dosing tank 9 is connected to a disinfectant dosing pipe 11. Branch pipe valves 12 are installed on the inlet pipe 8 and the outlet pipe 10 respectively, and a main pipe valve 27 is installed on the water supply pipe 3 located between the inlet pipe 8 and the outlet pipe 10.
[0027] During normal water supply, the main pipeline valve 27 is open, and the branch pipeline valves 12 on the inlet pipe 8 and outlet pipe 10 are closed, so the water does not flow through the chemical dosing tank 9.
[0028] When flushing the water supply riser 1, the main pipeline valve 27 is closed, and the branch pipeline valves 12 on the inlet pipe 8 and outlet pipe 10 are opened. The water upstream of the main pipeline valve 27 flows through the inlet pipe 8, the dosing tank 9 and the outlet pipe 10 and then flows back to the water supply pipe 3 downstream of the main pipeline valve 27. At the same time, chlorine-containing disinfectant is added to the dosing tank 9 through the disinfectant addition pipe 11, so that the water flow carries the disinfectant into the water supply riser 1, thereby improving the flushing effect of the water supply riser 1.
[0029] A vertically extending hollow tube 13 is rotatably mounted on the top wall of the dosing tank 9 via a bearing. The lower end of the hollow tube 13 is closed, and the upper end of the hollow tube 13 extends out of the dosing tank 9 and is rotatably connected to the disinfectant adding tube 11 via a rotary joint. A stirring tube 14 located inside the dosing tank 9 is welded to the lower end of the hollow tube 13. The stirring tube 14 is C-shaped with its opening facing the hollow tube 13. Both ends of the stirring tube 14 are connected to the inner cavity of the hollow tube 13, and multiple stirring tubes 14 are evenly spaced around the hollow tube 13. Multiple drug outlet holes 15 are evenly distributed on the stirring tube 14.
[0030] A horizontally arranged baffle 16 is welded inside the dosing tank 9. The baffle 16 is located between the water outlet end of the water inlet pipe 8 and the water inlet end of the water outlet pipe 10. A vertically through-hole annular plate is welded on the baffle 16. A vertically through-hole liquid passage 17 is provided in the annular plate. A hollow tube 13 is coaxially arranged with the liquid passage 17. The lower end of the hollow tube 13 extends into the liquid passage 17 and is fixedly installed with an impeller 18 by bolts.
[0031] Water flows into the dosing tank 9 through the inlet pipe 8 and then flows upward through the liquid passage 17. When the water flows through the liquid passage 17, it impacts the impeller 18 and drives the hollow tube 13 to rotate. The hollow tube 13 drives the stirring tube 14 to stir the water in the dosing tank 9. At the same time, the disinfectant is discharged through the outlet hole 15 on the stirring tube 14, so that the disinfectant and water are mixed more evenly.
[0032] The outlet end of the drain pipe 5 is connected to the filter box 19. The filter box 19 is equipped with filter media and activated carbon media for filtering solid particles and harmful substances in wastewater. The filter box 19 is connected to the top of the water storage tank 20 through a pipeline. The top wall of the water storage tank 20 is also equipped with a neutralizing agent addition pipe 21.
[0033] A stirrer 22 is also installed inside the water storage tank 20.
[0034] A drain pipe 23 is connected to one side of the bottom of the water storage tank 20. The drain pipe 23 is indirectly connected to the water collection well or the outdoor drainage system. A drain valve 24 is installed on the drain pipe 23.
[0035] The bottom of the water storage tank 20 is connected to a drain pipe 25, and a drain valve 26 is installed on the drain pipe 25.
[0036] Wastewater generated from flushing the water supply riser 1 is filtered by the filter box 19 and then temporarily stored in the water storage tank 20. Neutralizing agent is added to the water storage tank 20 through the neutralizing agent addition pipe 21 to neutralize the disinfectant in the wastewater. The wastewater in the water storage tank 20 is stirred by the agitator 22 to ensure that the neutralizing agent and disinfectant react fully, thereby avoiding the direct discharge of chlorine-containing wastewater and its impact on the surrounding environment.
[0037] After the neutralizing agent and disinfectant have fully reacted, first open the discharge valve 24 on the discharge pipe 23 to discharge the wastewater in the water storage tank 20; then open the drain valve 26 on the drain pipe 25 to discharge the sediment that has settled at the bottom of the water storage tank 20.
[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. An automatic flushing system for building water supply risers based on variable frequency water supply, characterized in that: It includes a vertically extending water supply riser, several water supply branch pipes connected to the side of the water supply riser, a water supply pipe connected to the lower end of the water supply riser, a drain pipe connected to the upper end of the water supply riser, and an electrical signal control valve installed on the water supply branch pipe and the drain pipe.
2. The automatic flushing system for building water supply risers based on variable frequency water supply as described in claim 1, characterized in that: An air vent valve is installed at the upper end of the water supply riser.
3. The automatic flushing system for building water supply risers based on variable frequency water supply as described in claim 1, characterized in that: It also includes an inlet pipe, a dosing tank, and an outlet pipe connected in sequence. The inlet end of the inlet pipe and the outlet end of the outlet pipe are both connected to the water supply pipe, and the dosing tank is connected to a disinfectant dosing pipe.
4. The automatic flushing system for building water supply risers based on variable frequency water supply as described in claim 3, characterized in that: The outlet end of the water outlet pipe is connected to the water outlet pipe located downstream of the water inlet pipe. Branch pipe valves are installed on the water inlet pipe and the water outlet pipe respectively. A main pipe valve is installed on the water supply pipe located between the water inlet pipe and the water outlet pipe.
5. The automatic flushing system for building water supply risers based on variable frequency water supply as described in claim 3, characterized in that: A vertically extending hollow tube is rotatably installed on the top wall of the dosing tank. The upper end of the hollow tube extends out of the outside of the dosing tank and is rotatably connected to the disinfectant adding tube. A stirring tube located inside the dosing tank is fixedly installed at the lower end of the hollow tube. The stirring tube is connected to the inner cavity of the hollow tube and has a drug outlet hole.
6. The automatic flushing system for building water supply risers based on variable frequency water supply as described in claim 5, characterized in that: A horizontally arranged baffle is fixedly installed inside the dosing tank. The baffle is located between the water outlet end of the water inlet pipe and the water inlet end of the water outlet pipe. A vertically through-hole is provided on the baffle. A hollow tube is coaxially arranged with the through-hole. The lower end of the hollow tube extends into the through-hole and is fixedly installed with an impeller.
7. The automatic flushing system for building water supply risers based on variable frequency water supply as described in claim 3, characterized in that: The outlet end of the drain pipe is connected to a filter box, the filter box is connected to a water storage tank, and the water storage tank is equipped with a neutralizing agent addition pipe.
8. The automatic flushing system for building water supply risers based on variable frequency water supply as described in claim 7, characterized in that: A stirrer is also installed inside the water storage tank.
9. The automatic flushing system for building water supply risers based on variable frequency water supply as described in claim 7, characterized in that: A drain pipe is connected to one side of the bottom of the water storage tank, and a drain valve is installed on the drain pipe.
10. The automatic flushing system for building water supply risers based on variable frequency water supply as described in claim 9, characterized in that: The bottom of the water storage tank is connected to a drain pipe, and a drain valve is installed on the drain pipe.