Active-disturbance-rejection pressure-superposed water supply system

Abstract

The utility model relates to an active disturbance rejection pressure-superposed water supply system. Comprising a first pipeline, a first valve, a first check valve, a first pressure sensor, a first electric valve, a first variable frequency pump, a second check valve, a second electric valve, a second pressure sensor, a flow sensor, a plurality of branch pipelines arranged at the tail end of the first pipeline, a second pipeline, a third pipeline, a third electric valve, a water storage part and a fourth electric valve. The second valve is mounted on the third pipeline; and the first air pressure water tank is mounted at the second end part of the third pipeline. A first check valve, a second check valve and a first air pressure water tank are arranged to stabilize the water pressure in the system, so that water supply is more stable, the power of the first variable frequency pump is more stable, and the working energy consumption is reduced; the water storage part is used for storing water during normal water supply and supplying water when municipal water supply is interrupted, so that the water supply cut-off condition at the tail end is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of secondary water supply systems, and more specifically, to a self-interference-resistant superimposed water supply system. Background Art

[0002] In urban water use, the water supply pressure of the municipal pipeline network fluctuates and is unstable, and the water pressure is not enough when supplying water directly. It is necessary to set up a secondary water supply system to increase the pressure and adjust it before supplying water to the user end. In the prior art, superimposed water supply makes full use of the residual pressure of the pipeline network to perform variable frequency constant pressure water supply, which has many advantages and is one of the most promising systems in secondary pressurized water supply technology. However, when the water supply pressure of the municipal pipeline network is unstable or the water consumption at the user end is low, the frequency conversion pump in the system works in a high energy consumption range, resulting in high energy consumption of the system; and the superimposed water supply system is difficult to ensure continuous and stable water supply to the user end when the water supply of the municipal pipeline network is interrupted, resulting in poor emergency response capabilities of the system and not adapting to various adverse conditions of the municipal pipeline network. At the same time, some secondary water supply systems will also generate a lot of noise when supplying water. Utility Model Content

[0003] In order to overcome the defects of the secondary water supply system in the above-mentioned prior art that it is difficult to ensure continuous and stable water supply when the water supply in the municipal pipeline network is interrupted and the emergency response capability is poor, the utility model provides a self-interference-resistant superimposed water supply system. When the water supply in the municipal pipeline network is interrupted, continuous and stable water supply can be achieved in a short time, thereby improving the emergency response capability of the system.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a self-anti-disturbance superimposed water supply system, including: a first pipeline, a first valve installed on the first pipeline in sequence, a first check valve, a first pressure sensor, a first electric valve, a first variable frequency pump, a second check valve, a second electric valve, a second pressure sensor and a flow sensor, a plurality of branch pipelines arranged at the end of the first pipeline, a second pipeline and a third pipeline whose first ends are respectively connected to the first pipeline, a third electric valve installed on the second pipeline in sequence, a water storage part, a fourth electric valve, a second valve installed on the third pipeline, and a first air pressure water tank installed at the second end of the third pipeline; the first ends of the second pipeline and the third pipeline are both located between the first valve and the first pressure sensor, and the second end of the second pipeline is connected to the first pipeline and is located between the first electric valve and the first variable frequency pump.

[0005] One end of the first pipeline is connected to the municipal water supply, and the other end is provided with a plurality of branch pipelines, which are used to supply water to users. The first water flow flows through the first valve, the first check valve, the first pressure sensor, the first electric valve, the first variable frequency pump, the second check valve, the second electric valve, the second pressure sensor, and the flow sensor in sequence, and then flows out from the end of the branch pipeline for use by users; when the first water flow passes through the second pipeline after passing through the first valve, a second water flow is generated, and the second water flow enters the second pipeline, and then flows through the third electric valve, the water storage part, and the fourth electric valve in sequence, and then returns to the first pipeline, and then flows through the first variable frequency pump, the second check valve, the second electric valve, the second pressure sensor, and the flow sensor in sequence, and then flows out from the end of the branch pipeline.

[0006] The water storage unit is used to store water when the municipal water supply is normal, and to supply water when the municipal water supply is interrupted, so as to ensure the normal water use of users and avoid water outages, thereby strengthening the water storage capacity and emergency supply capacity of the system. Specifically, when the first pressure sensor detects that the water outage exceeds the set time, or determines that the municipal pipe network water supply is interrupted by other means, the fourth electric valve is opened, and the water storage unit supplies water. A first air pressure water tank is also provided between the first valve and the first pressure sensor. When the municipal water supply pressure is insufficient, the first air pressure water tank provides pressure to ensure the stability of the water supply pressure. The first check valve and the second check valve are arranged on both sides of the first variable frequency pump, and cooperate with the first air pressure water tank to further effectively stabilize the water supply pressure of the municipal pipe network, avoid the pressure fluctuation of the municipal pipe network from affecting the performance of the first variable frequency pump, and improve the service life of the first variable frequency pump. The pressure energy during the peak pressure period of the municipal pipe network can also be stored, and the working power of the first variable frequency pump can be reduced, and the energy consumption can be reduced, and the energy efficiency can be improved. The second end of the second pipeline is arranged between the first electric valve and the first variable frequency pump. When the water of the water storage unit is used, the first electric valve is closed, thereby preventing the water from flowing back.

[0007] Preferably, the water storage part includes a water storage member arranged on the second pipeline, and a float valve and a first water level detector respectively arranged in the water storage member.

[0008] The water storage member can be a water reservoir or a water storage tank, etc. A float valve is provided to control the automatic water inlet and automatic water shutoff of the water storage member. The first water level detector is used to detect the water level of the water storage member. When the water is drained, the first variable frequency pump stops working to avoid damage to the pump body. Furthermore, the water storage member is arranged at a high position to further store energy, and the water pressure can be higher when water is used.

[0009] Preferably, the water storage part further includes a drain pipe connected to the lower part of the water storage member and a third valve installed on the drain pipe.

[0010] The drain pipe is used to drain water from the water storage component, which is convenient for temporary use or cleaning of the water storage component nearby, and also convenient for directing water to the required location.

[0011] Preferably, the water storage part further comprises an overflow pipe connected to the water storage member, the overflow pipe is connected to the drain pipe, and the connection position is located between the end of the drain pipe and the third valve.

[0012] The overflow pipe is set at the highest water level of the water storage part to improve the stability of water storage and avoid accidents caused by water overflow. When the water level exceeds the setting, it flows away along the end of the drain pipe through the overflow pipe, and the water flow of the overflow pipe is not controlled by the third valve.

[0013] Preferably, a simmering pot is also installed on the first pipeline, a first pressure gauge and a vacuum suppressor are installed on the simmering pot, a second water level detector is arranged in the simmering pot, and the simmering pot is located between the second pipeline and the first pressure sensor.

[0014] The flow stabilization tank is used to further improve the stability of water supply pressure, thereby further reducing the working power of the first variable frequency pump and reducing energy consumption. When the water supply pressure of the municipal pipeline network is normal and stable, the flow stabilization tank is filled with water, the valve connecting the vacuum suppressor to the outside atmosphere is closed, and the municipal pipeline network water pressure is pressurized by the first variable frequency pump to the water pressure required by the user, and then the water is delivered to the user's end. When the water supply pressure of the municipal pipeline network becomes smaller, the first air pressure water tank will release the excess water pressure stored in the tank to keep the water inlet pressure of the flow stabilization tank stable and avoid the water pressure fluctuation of the municipal pipeline network from affecting the frequency control of the first variable frequency pump. When the water supply pressure of the municipal pipeline network is too small or even stops, the vacuum suppressor in the flow stabilization tank is opened to connect the air in the flow stabilization tank with the atmosphere outside the tank to keep the relative pressure in the tank at zero, avoiding the vacuum phenomenon in the tank, which causes the first variable frequency pump to run hard and consume too much energy. When the second water level detector detects that the water level in the flow stabilization tank is too low, the first variable frequency pump stops working to avoid damage to the pump body. At the same time, the second water level detector in the stabilizing tank also serves as a monitoring device for detecting the water supply situation of the municipal pipeline network. When the second water level detector detects that the water level in the stabilizing tank is lower than the set water level, it can also be judged that the water supply of the municipal pipeline network is interrupted.

[0015] Preferably, it also includes a fourth pipeline connected in parallel with the first pipeline, and a fifth electric valve, a third check valve and a fourth valve are installed on the fourth pipeline in sequence, the first end of the fourth pipeline is located between the first electric valve and the first variable frequency pump, the second end of the fourth pipeline is located between the second electric valve and the second pressure sensor, and the third check valve is used to prevent water from flowing back from the second end of the fourth pipeline to the first end of the fourth pipeline.

[0016] When the water supply pressure of the municipal pipeline network can meet the water pressure demand of the user end, the second electric valve is closed, the fifth electric valve is opened, and the water flows from the fourth pipeline to the user end without passing through the first variable frequency pump, thereby reducing system energy consumption.

[0017] Preferably, the first pipeline is also connected to a fifth pipeline, a fifth valve is installed on the fifth pipeline, a second pressure water tank is installed at the end of the fifth pipeline, and the fifth pipeline is located between the flow sensor and the branch pipeline.

[0018] When the flow sensor detects that the total water flow at the user end is too small, the first variable frequency pump stops to prevent the first variable frequency pump from being in a low energy efficiency operation range and excessive energy consumption. At the same time, the second air pressure water tank will release the water volume and water pressure stored in the tank to make up for the insufficient water pressure of the municipal water supply, thereby ensuring the user's water demand during the low water consumption period. When the second air pressure water tank releases water, the second electric valve is closed, and the second electric valve and the second check valve prevent water from flowing back into the first variable frequency pump.

[0019] Preferably, the device further includes a sixth pipeline connected in parallel with the first pipeline, on which a sixth electric valve, a second variable frequency pump, a fourth check valve, and a seventh electric valve are sequentially installed, a first end of the sixth pipeline is located between the first electric valve and the first variable frequency pump, a second end of the sixth pipeline is located between the second electric valve and the second pressure sensor, and an eighth electric valve is also installed between the connection portion between the sixth pipeline and the first pipeline and the first variable frequency pump.

[0020] When the user's water consumption is large, a second variable frequency pump is set in parallel through the sixth pipeline, and the first variable frequency pump and the second variable frequency pump work together to meet the demand. At this time, when only the first variable frequency pump is needed to work, the eighth electric valve and the second electric valve are opened, and the sixth electric valve and the seventh electric valve are closed. When only the second variable frequency pump is needed to work, the sixth electric valve and the seventh electric valve are opened, and the eighth electric valve and the second electric valve are closed. When the first variable frequency pump is damaged, the second variable frequency pump can be switched immediately. The setting of the second variable frequency pump also improves the water supply stability of the system.

[0021] Preferably, both ends of the first variable frequency pump are installed on the first pipeline through flexible connectors.

[0022] The setting of the flexible connector is used to improve the anti-noise effect of the system. Further, both ends of the second variable frequency pump are also installed through the flexible connector.

[0023] Preferably, a second pressure gauge and a filter are installed in sequence between the first valve and the first check valve, the flexible connector is installed between the second pressure gauge and the filter, and a sixth valve is installed on the side of the first check valve close to the second pipeline, and the sixth valve can simultaneously close the water flow entering the second pipeline and the third pipeline.

[0024] The second pressure gauge, the filter and the first check valve are arranged between the first valve and the sixth valve, which can facilitate the maintenance and repair of the filter.

[0025] Compared with the prior art, the utility model has the following beneficial effects:

[0026] 1. The first check valve, the second check valve and the first air pressure water tank are provided to stabilize the water pressure in the system, so as to make the water supply more stable, and also make the power of the first variable frequency pump more stable, thereby reducing the working energy consumption; the water storage part is provided to store water during normal water supply and supply water when the municipal water supply is interrupted, thereby avoiding water outage at the end.

[0027] 2. The system can effectively stabilize the water supply pressure of the municipal pipe network by adding the first air pressure water tank and check valve at the municipal pipe network access pipe section, avoiding the pressure fluctuation of the municipal pipe network from affecting the performance of the first variable frequency pump. In addition, the water storage unit can also store the pressure energy during the peak pressure period of the municipal pipe network, play a certain pressure stabilizing role, and improve the energy efficiency of the first variable frequency pump.

[0028] 3. When the water supply from the municipal pipeline network is interrupted, the system can automatically switch through the valve and use the spare water in the water storage as water supply, thereby enhancing the system's water storage capacity and emergency supply capacity.

[0029] 4. The system ensures the stability and safety of the system through reasonable valve settings. For example, when the municipal pipe network water supply is interrupted, it can prevent the backup water in the water storage from flowing back into the flow stabilization tank; when the first variable frequency pump stops, it can prevent the water in the second air pressure water tank from flowing back into the water pump; the setting of the soft connector improves the anti-noise effect of the system.

[0030] 5. Stop valves are installed at both ends of the main equipment to facilitate maintenance and overhaul.

[0031] 6. When the water storage device is placed at a higher position, it can also play a role in energy storage, achieving the energy-saving purpose of not wasting the residual pressure of the municipal pipe network. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the first implementation structure of a self-anti-disturbance superimposed water supply system of the utility model;

[0033] Figure 2 This is a schematic diagram of the second implementation structure of a self-interference-resistant superimposed water supply system of the utility model;

[0034] Figure 3 It is a schematic diagram of the third implementation structure of a self-interference-resistant superimposed water supply system of the utility model.

[0035] In the figure: 1, first pipeline; 2, first valve; 3, first check valve; 4, first pressure sensor; 5, first electric valve; 6, first variable frequency pump; 7, second check valve; 8, second electric valve; 9, second pressure sensor; 10, flow sensor; 11, branch pipeline; 12, second pipeline; 13, third pipeline; 14, third electric valve; 15, water storage part; 1501, water storage part; 1502, float valve; 1503, first water level detector; 1504, drain pipe; 1505, third valve; 1506, overflow pipe; 16, fourth electric valve; 17, second valve ; 18. First air pressure water tank; 19. Flow stabilizing tank; 20. First pressure gauge; 21. Vacuum suppressor; 22. Second water level detector; 23. Fourth pipeline; 24. Fifth electric valve; 25. Third check valve; 26. Fourth valve; 27. Fifth pipeline; 28. Fifth valve; 29. ​​Second air pressure water tank; 30. Sixth pipeline; 31. Sixth electric valve; 32. Second variable frequency pump; 33. Fourth check valve; 34. Seventh electric valve; 35. Eighth electric valve; 36. Flexible connector; 37. Second pressure gauge; 38. Filter; 39. Sixth valve; 40. Central processing unit. DETAILED DESCRIPTION

[0036] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0037] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0038] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0039] Example 1

[0040] like Figure 1As shown, a self-anti-disturbance superimposed water supply system includes: a first pipeline 1, a first valve 2, a first check valve 3, a first pressure sensor 4, a first electric valve 5, a first variable frequency pump 6, a second check valve 7, a second electric valve 8, a second pressure sensor 9 and a flow sensor 10, a plurality of branch pipelines 11 arranged at the end of the first pipeline 1, a second pipeline 12 and a third pipeline 13, each of which has a first end connected to the first pipeline 1, a third electric valve 14, a water storage part 15, a fourth electric valve 16, a second valve 17 installed on the third pipeline 13, and a first air pressure water tank 18 installed at the second end of the third pipeline 13; the first ends of the second pipeline 12 and the third pipeline 13 are both located between the first valve 2 and the first pressure sensor 4, and the second end of the second pipeline 12 is connected to the first pipeline 1 and is located between the first electric valve 5 and the first variable frequency pump 6.

[0041] One end of the first pipeline 1 is connected to the municipal water supply, and the other end is provided with a plurality of branch pipelines 11, which are used to supply water to users. The first water flow sequentially flows through the first valve 2, the first check valve 3, the first pressure sensor 4, the first electric valve 5, the first variable frequency pump 6, the second check valve 7, the second electric valve 8, the second pressure sensor 9, and the flow sensor 10, and then flows out from the end of the branch pipeline 11 for use by users; when the first water flow passes through the second pipeline 12 after passing through the first valve 2, a second water flow is generated, and the second water flow enters the second pipeline 12, and then sequentially flows through the third electric valve 14, the water storage part 15, and the fourth electric valve 16, and then returns to the first pipeline 1, and then sequentially flows through the first variable frequency pump 6, the second check valve 7, the second electric valve 8, the second pressure sensor 9, and the flow sensor 10, and then flows out from the end of the branch pipeline 11.

[0042] The water storage unit 15 is used to store water when the municipal water supply is normal, and to supply water when the municipal water supply is interrupted, so as to ensure the normal water use of users and avoid water outages, thereby strengthening the water storage capacity and emergency supply capacity of the system. Specifically, when the first pressure sensor 4 detects that the water outage exceeds the set time, or determines that the municipal pipe network water supply is interrupted by other means, the fourth electric valve 16 opens, and the water storage unit 15 supplies water. A first air pressure water tank 18 is also provided between the first valve 2 and the first pressure sensor 4. When the municipal water supply pressure is insufficient, the first air pressure water tank 18 provides pressure to ensure the stability of the water supply pressure. The first check valve 3 and the second check valve 7 are arranged on both sides of the first variable frequency pump 6, and cooperate with the first air pressure water tank 18 to further effectively stabilize the water supply pressure of the municipal pipe network, avoid the pressure fluctuation of the municipal pipe network from affecting the performance of the first variable frequency pump 6, and improve the service life of the first variable frequency pump 6. The pressure energy during the peak pressure period of the municipal pipe network can also be stored to reduce the working power of the first variable frequency pump 6, reduce energy consumption, and improve energy efficiency. The second end of the second pipe 12 is arranged between the first electric valve 5 and the first variable frequency pump 6. When the water of the water storage part 15 is used, the first electric valve 5 is closed to prevent the water from flowing back.

[0043] The beneficial effects of this embodiment are as follows: the first check valve 3, the second check valve 7 and the first air pressure water tank 18 are provided to stabilize the water pressure in the system, so that the water supply is more stable, and the power of the first variable frequency pump 6 is more stable, thereby reducing the working energy consumption; the water storage part 15 is provided to store water during normal water supply and to supply water when the municipal water supply is interrupted, thereby avoiding water outage at the end.

[0044] Example 2

[0045] like Figure 1-2 As shown, based on Example 1, the difference from Example 1 is that:

[0046] The water storage part 15 includes a water storage part 1501 arranged on the second pipeline 12, a float valve 1502 and a first water level detector 1503 respectively arranged in the water storage part 1501. The water storage part 15 also includes a drain pipe 1504 connected to the lower part of the water storage part 1501 and a third valve 1505 installed on the drain pipe 1504. The water storage part 15 also includes an overflow pipe 1506 connected to the water storage part 1501, and the overflow pipe 1506 is connected to the drain pipe 1504, and the connection position is located between the end of the drain pipe 1504 and the third valve 1505. A swirl pot 19 is also installed on the first pipeline 1, and a first pressure gauge 20 and a vacuum suppressor 21 are installed on the swirl pot 19. A second water level detector 22 is arranged in the swirl pot 19, and the swirl pot 19 is located between the second pipeline 12 and the first pressure sensor 4. It also includes a fourth pipeline 23 connected in parallel with the first pipeline 1, and a fifth electric valve 24, a third check valve 25 and a fourth valve 26 are sequentially installed on the fourth pipeline 23. The first end of the fourth pipeline 23 is located between the first electric valve 5 and the first variable frequency pump 6, and the second end of the fourth pipeline 23 is located between the second electric valve 8 and the second pressure sensor 9. The third check valve 25 is used to prevent water from flowing back from the second end of the fourth pipeline 23 to the first end of the fourth pipeline 23. The first pipeline 1 is also connected to a fifth pipeline 27, and a fifth valve 28 is installed on the fifth pipeline 27. A second air pressure water tank 29 is installed at the end of the fifth pipeline 27. The fifth pipeline 27 is located between the flow sensor 10 and the branch pipeline 11.

[0047] The water storage part 1501 can be a water storage tank or a water storage tank, etc., and a float valve 1502 is provided to control the automatic water inlet and automatic water shutoff of the water storage part 1501. The first water level detector 1503 is used to detect the water level of the water storage part 1501. When the water is drained, the first variable frequency pump 6 stops working to avoid damage to the pump body. Furthermore, the water storage part 1501 is set at a high position, which can further store energy, and the water pressure can be higher when using water. The drain pipe 1504 is used to discharge the water in the water storage part 1501, which is convenient for temporary use or cleaning of the water storage part 1501 nearby, and is also convenient for leading water to the desired location. The overflow pipe 1506 is set at the highest water level of the water storage part 1501 to improve the stability of water storage and avoid accidents caused by water overflow. When the water level exceeds the setting, it flows away along the end of the drain pipe 1504 through the overflow pipe 1506, and the water flow of the overflow pipe 1506 is not controlled by the third valve 1505. The flow stabilization tank 19 is used to further improve the stability of the water supply pressure, thereby further reducing the working power of the first variable frequency pump 6 and reducing energy consumption. When the water supply pressure of the municipal pipeline network is normal and stable, the flow stabilization tank 19 is filled with water, the valve connecting the vacuum suppressor 21 to the outside atmosphere is closed, and the municipal pipeline network water pressure is pressurized by the first variable frequency pump 6 to the water pressure required by the user, and then the water is delivered to the user's end. When the water supply pressure of the municipal pipeline network becomes smaller, the first air pressure water tank 18 will release the excess water pressure stored in the tank to keep the water inlet pressure of the flow stabilization tank 19 stable and avoid the water pressure fluctuation of the municipal pipeline network from affecting the frequency control of the first variable frequency pump 6. When the water supply pressure of the municipal pipeline network is too small or even stops, the vacuum suppressor 21 in the flow stabilization tank 19 is opened to connect the air in the flow stabilization tank 19 to the atmosphere outside the tank to keep the relative pressure in the tank at zero, avoiding the vacuum phenomenon in the tank, which causes the first variable frequency pump 6 to run stably and consume too much energy. When the second water level detector 22 detects that the water level in the simmering tank 19 is too low, the first variable frequency pump 6 stops working to avoid damage to the pump body. At the same time, the second water level detector 22 in the simmering tank 19 also serves as a monitoring device for detecting the water supply of the municipal pipeline network. When the second water level detector 22 detects that the water level in the simmering tank 19 is lower than the set water level, it can also be determined that the water supply of the municipal pipeline network is interrupted. Specifically, the water flows through the first valve 2, the first check valve 3, and the connection of the second pipeline 12, and then flows out of the simmering tank 19 to the end.

[0048] When the water supply pressure of the municipal pipe network can meet the water pressure demand of the user end, the second electric valve 8 is closed, the fifth electric valve 24 is opened, and the water does not pass through the first variable frequency pump 6, but flows to the user end from the fourth pipe 23, thereby reducing the energy consumption of the system. When the flow sensor 10 detects that the total water flow at the user end is too small, the first variable frequency pump 6 is shut down to avoid the first variable frequency pump 6 being in a low energy efficiency operation range and excessive energy consumption. At the same time, the second air pressure water tank 29 will release the water volume and water pressure stored in the tank to make up for the insufficient water pressure of the municipal water supply, thereby ensuring the water demand of the user during the low water consumption period. When the second air pressure water tank 29 releases water, the second electric valve 8 is closed, and the second electric valve 8 and the second check valve 7 prevent the water from flowing back into the first variable frequency pump 6.

[0049] More specifically, in this embodiment, when the first pressure sensor 4 detects that the water supply from the municipal pipeline exceeds the set protection time, and the second water level detector 22 detects that the water level in the flow-stabilizing tank 19 is lower than the set water level, the water source in the water storage component 1501 is activated again. When the first water level detector 1503 detects that the water storage component 1501 is lower than the set position, the first variable frequency pump 6 stops working to avoid damage. When the municipal pipeline resumes water supply, the third electric valve 14 opens, the fourth electric valve 16 closes, and the water storage component 1501 stores water. After the first water level detector 1503 detects that there is enough water, the third electric valve 14 closes to end the water storage. At the same time, the float valve 1502 will also automatically close when the water level reaches the set position, providing double protection to avoid excessive water storage.

[0050] In this embodiment, a central processor 40 is also provided for receiving and sending signals and processing signals.

[0051] In this embodiment, a second pressure water tank 29 is provided on the first pipeline 1. The second pressure water tank 29 plays a role in stabilizing the flow, and the water pressure is more stable. It is relatively suitable for small flow, medium flow and relatively unstable supply pressure of the first variable frequency pump 6. At the same time, in the small flow condition, the first variable frequency pump 6 can be turned off and the second pressure water tank 29 can be used for pressure supply to avoid the low energy efficiency operation of the first variable frequency pump 6 at a small flow, thereby reducing energy consumption. The scheme of Example 1 does not set the second pressure water tank 29, which is relatively suitable for medium flow, large flow and relatively stable supply pressure of the first variable frequency pump 6.

[0052] Specifically, each branch pipeline 11 is provided with a valve.

[0053] The remaining features and working principles of this embodiment are consistent with those of Embodiment 1.

[0054] Example 3

[0055] like Figure 1-3 As shown, based on Example 1 or Example 2, Example 1 or Example 2 is further limited, and the difference is that:

[0056] The sixth pipeline 30 is also included in parallel with the first pipeline 1. The sixth pipeline 30 is sequentially installed with a sixth electric valve 31, a second variable frequency pump 32, a fourth check valve 33, and a seventh electric valve 34. The first end of the sixth pipeline 30 is located between the first electric valve 5 and the first variable frequency pump 6. The second end of the sixth pipeline 30 is located between the second electric valve 8 and the second pressure sensor 9. An eighth electric valve 35 is also installed between the connection part between the sixth pipeline 30 and the first pipeline 1 and the first variable frequency pump 6. Both ends of the first variable frequency pump 6 are installed on the first pipeline 1 through a flexible connector 36. A second pressure gauge 37 and a filter 38 are also sequentially installed between the first valve 2 and the first check valve 3. A flexible connector 36 is also installed between the second pressure gauge 37 and the filter 38. A sixth valve 39 is also installed on the side of the first check valve 3 close to the second pipeline 12. The sixth valve 39 can simultaneously close the water flow entering the second pipeline 12 and the third pipeline 13.

[0057] When the user's water consumption is large, a second variable frequency pump 32 is set in parallel through the sixth pipeline 30, and the first variable frequency pump 6 and the second variable frequency pump 32 work together to meet the demand. At this time, when only the first variable frequency pump 6 is required to work, the eighth electric valve 35 and the second electric valve 8 are opened, and the sixth electric valve 31 and the seventh electric valve 34 are closed. When only the second variable frequency pump 32 is required to work, the sixth electric valve 31 and the seventh electric valve 34 are opened, and the eighth electric valve 35 and the second electric valve 8 are closed; when the first variable frequency pump 6 is damaged, the second variable frequency pump 32 can be switched immediately, and the setting of the second variable frequency pump 32 also improves the water supply stability of the system. The setting of the soft connector 36 is used to improve the anti-noise effect of the system. Further, both ends of the second variable frequency pump 32 are also installed through the soft connector 36. The second pressure gauge 37, the filter 38 and the first check valve 3 are arranged between the first valve 2 and the sixth valve 39, which can facilitate the maintenance and repair of the filter 38.

[0058] In this embodiment, the first variable frequency pump 6 and the second variable frequency pump 32 are both secondary variable frequency water pumps.

[0059] The rest of the working principle and working process of this embodiment are consistent with those of Embodiment 1 or Embodiment 2.

[0060] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. An anti-disturbance superimposed water supply system, characterized in that: include: A first pipeline (1), a first valve (2) sequentially installed on the first pipeline (1), a first check valve (3), a first pressure sensor (4), a first electric valve (5), a first variable frequency pump (6), a second check valve (7), a second electric valve (8), a second pressure sensor (9) and a flow sensor (10), a plurality of branch pipelines (11) arranged at the end of the first pipeline (1), a second pipeline (12) and a third pipeline (13) whose first ends are respectively connected to the first pipeline (1), a third electric valve (14) sequentially installed on the second pipeline (12), a water storage part (15), a fourth electric valve (16), a second valve (17) installed on the third pipeline (13), and a first air pressure water tank (18) installed at the second end of the third pipeline (13); The first ends of the second pipeline (12) and the third pipeline (13) are both located between the first valve (2) and the first pressure sensor (4); the second end of the second pipeline (12) is connected to the first pipeline (1) and is located between the first electric valve (5) and the first variable frequency pump (6).

2. The self-disturbance-resistance superimposed water supply system according to claim 1, characterized in that: The water storage part (15) comprises a water storage member (1501) arranged on the second pipeline (12), a float valve (1502) and a first water level detector (1503) respectively arranged in the water storage member (1501).

3. The self-disturbance-resistance superimposed water supply system according to claim 2, characterized in that: The water storage part (15) further comprises a drainage pipe (1504) connected to the lower part of the water storage member (1501) and a third valve (1505) installed on the drainage pipe (1504).

4. The self-disturbance-resistance superimposed water supply system according to claim 3, characterized in that: The water storage portion (15) further comprises an overflow pipe (1506) connected to the water storage member (1501); the overflow pipe (1506) is connected to the drain pipe (1504), and the connection position is located between the end of the drain pipe (1504) and the third valve (1505).

5. The self-disturbance-resistance superimposed water supply system according to claim 1, characterized in that: A swirl pot (19) is also installed on the first pipeline (1), a first pressure gauge (20) and a vacuum suppressor (21) are installed on the swirl pot (19), a second water level detector (22) is arranged inside the swirl pot (19), and the swirl pot (19) is located between the second pipeline (12) and the first pressure sensor (4).

6. The self-disturbance-resistance superimposed water supply system according to claim 1, characterized in that: The invention also comprises a fourth pipeline (23) connected in parallel with the first pipeline (1); a fifth electric valve (24), a third check valve (25) and a fourth valve (26) are sequentially installed on the fourth pipeline (23); a first end of the fourth pipeline (23) is located between the first electric valve (5) and the first variable frequency pump (6); a second end of the fourth pipeline (23) is located between the second electric valve (8) and the second pressure sensor (9); and the third check valve (25) is used to prevent water from flowing back from the second end of the fourth pipeline (23) to the first end of the fourth pipeline (23).

7. The self-disturbance-resistance superimposed water supply system according to claim 6, characterized in that: The first pipeline (1) is also connected to a fifth pipeline (27), a fifth valve (28) is installed on the fifth pipeline (27), a second pressure water tank (29) is installed at the end of the fifth pipeline (27), and the fifth pipeline (27) is located between the flow sensor (10) and the branch pipeline (11).

8. The self-disturbance-resistance superimposed water supply system according to claim 1, characterized in that: The invention further comprises a sixth pipeline (30) connected in parallel with the first pipeline (1); a sixth electric valve (31), a second variable frequency pump (32), a fourth check valve (33), and a seventh electric valve (34) are sequentially installed on the sixth pipeline (30); a first end of the sixth pipeline (30) is located between the first electric valve (5) and the first variable frequency pump (6); a second end of the sixth pipeline (30) is located between the second electric valve (8) and the second pressure sensor (9); and an eighth electric valve (35) is also installed between the connection portion between the sixth pipeline (30) and the first pipeline (1) and the first variable frequency pump (6).

9. The self-disturbance rejection superimposed water supply system according to any one of claims 1 to 8, characterized in that: Both ends of the first variable frequency pump (6) are installed on the first pipeline (1) via flexible connectors (36).

10. The self-disturbance-resistance superimposed water supply system according to claim 9, characterized in that: A second pressure gauge (37) and a filter (38) are installed in sequence between the first valve (2) and the first check valve (3); the flexible connector (36) is installed between the second pressure gauge (37) and the filter (38); a sixth valve (39) is installed on the side of the first check valve (3) close to the second pipeline (12); the sixth valve (39) can simultaneously close the water flow entering the second pipeline (12) and the third pipeline (13).

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