Flood-proof secondary water supply system and water supply control method thereof

Abstract

According to the flood-proof secondary water supply system and the water supply control method thereof, when it is determined that the water pressure of a public water supply pipe network is larger than or equal to a first water pressure threshold value, a control cabinet controls water to be supplied to a water client side through a non-negative-pressure water supply branch, and when it is determined that the water pressure of the public water supply pipe network is smaller than the first water pressure threshold value, water is supplied to the water client side through a non-negative-pressure water supply branch; when the control cabinet determines that the water pressure in the water outlet pipeline is smaller than a second water pressure threshold value, the control cabinet controls the water storage tank water supply branch to supply water to the water use client side, so that excessive water taking of the public water supply pipe network is avoided, and the water use requirement of the user client side can be met; if it is determined that the water pressure in the water outlet pipeline is larger than or equal to the second water pressure threshold value, the supercharging device is controlled to be closed, and the water pressure actually needed by customers is better met by starting and stopping the supercharging device.

Description

Technical Field

[0001] This application relates to the technical field of water supply, and particularly to a flood-proof secondary water supply system and its water supply control method. Background Art

[0002] Existing flood-proof water supply systems usually adopt non-negative pressure water supply, which belongs to secondary water supply technology. Currently, non-negative pressure water supply equipment is usually connected to the water supply pipe network. When the water supply pressure of the water supply pipe network is insufficient, in order to avoid directly pumping water from the pipe network, the non-negative pressure water supply equipment needs to stop operating to avoid generating negative pressure in the pipe network. At this time, the water use requirements of the water use client cannot be met. Summary of the Invention

[0003] The purpose of the embodiments of this application is to provide a flood-proof secondary water supply system and its water supply control method to solve the above technical problems.

[0004] On the one hand, a flood-proof secondary water supply system is provided. The flood-proof secondary water supply system includes a control cabinet, a water inlet pipeline connected to the public water supply pipe network, a water storage tank water supply branch and a non-negative pressure water supply branch connected to the water outlet end of the water inlet pipeline. The water outlet ends of the water storage tank water supply branch and the non-negative pressure water supply branch are sequentially connected to the water use client through a pressurization pipeline and a water outlet pipeline. A pressurization device for pressurizing the liquid in the pressurization pipeline is provided on the pressurization pipeline;

[0005] The control cabinet is used to control the water supply to the water use client through the non-negative pressure water supply branch when it is determined that the water pressure of the public water supply pipe network is greater than or equal to the first water pressure threshold, and is used to control the water supply to the water use client through the water storage tank water supply branch when it is determined that the water pressure of the public water supply pipe network is less than the first water pressure threshold;

[0006] The control cabinet is also used to control the opening of the pressurization device when it is determined that the water pressure in the water outlet pipeline is less than the second water pressure threshold, and to control the closing of the pressurization device if it is determined that the water pressure in the water outlet pipeline is greater than or equal to the second water pressure threshold.

[0007] In one embodiment, the water storage tank water supply branch includes a first water storage tank water supply pipeline connected to the water outlet end of the water inlet pipeline, a first valve provided on the first water storage tank water supply pipeline, a water storage tank connected to the water outlet end of the first water storage tank water supply pipeline, a second water storage tank water supply pipeline connected to the water outlet end of the water storage tank, and a first sensor for detecting the liquid level height in the water storage tank;

[0008] The control cabinet is used to control the opening of the first valve to replenish water to the water storage tank when the liquid level height detected by the first sensor is less than the preset liquid level height threshold, and is used to control the closing of the first valve when the liquid level height detected by the first sensor is greater than or equal to the preset liquid level height threshold.

[0009] In one embodiment, the water supply branch of the water storage tank further includes a first booster pump and a disinfection device provided on the water supply pipeline of the water storage tank or the second water storage tank;

[0010] The control cabinet is further used to control the opening of the first booster pump and the disinfection device when supplying water to the water-using client through the water supply branch of the water storage tank.

[0011] In one embodiment, the control cabinet is further used to control the supply of water to the water-using client through the water supply branch of the water storage tank when it is monitored that no water has been supplied to the water-using client through the water supply branch of the water storage tank for a continuous preset duration.

[0012] In one embodiment, the booster pipeline includes a first pipeline and a second pipeline connected in sequence; a second booster pump is provided on the second pipeline;

[0013] The water inlet end of the first pipeline is connected to the water outlet end of the water supply branch of the water storage tank and the water outlet end of the non-negative pressure water supply branch. The water outlet end of the first pipeline is connected to the water inlet end of the second pipeline, and the water outlet end of the second pipeline is connected to the water inlet end of the water outlet pipeline;

[0014] The control cabinet is used to control the opening of the second booster pump in the second pipeline when it is determined that the water pressure in the water outlet pipeline is less than the second preset water pressure threshold.

[0015] In one embodiment, the second pipeline includes a working pipeline and a standby pipeline connected in parallel with the working pipeline, and second booster pumps are provided on both the working pipeline and the standby pipeline;

[0016] The control cabinet is used to control the opening of the second booster pump in the working pipeline and control the closing of the second booster pump in the standby pipeline when it is determined that the water pressure in the water outlet pipeline is less than the second preset water pressure threshold and it is determined that the working pipeline is normal;

[0017] The control cabinet is used to control the closing of the second booster pump in the working pipeline and control the opening of the second booster pump in the standby pipeline when it is determined that the water pressure in the water outlet pipeline is less than the second preset water pressure threshold and it is determined that the working pipeline is faulty.

[0018] In one embodiment, the control cabinet is further configured to control the closing of the second booster pump in the second pipeline when it is determined that the water pressure in the first pipeline is less than the third water pressure threshold.

[0019] In one embodiment, the flood prevention secondary water supply system further includes a first flowmeter disposed on the water inlet pipeline and a second flowmeter disposed on the water outlet pipeline; the control cabinet is configured to give an alarm prompt when it is determined that the difference between the first flow value measured by the first flowmeter and the second flow value measured by the second flowmeter is greater than a preset flow difference threshold.

[0020] In one embodiment, a drainage ditch is provided around the location where the flood prevention secondary water supply system is located. The drainage ditch is connected to a sump, and the terrain where the sump is located is lower than the terrain where the drainage ditch is located. A second sensor is provided in the drainage ditch, a third sensor and a drainage pump are provided in the sump, and a fourth sensor is provided at the location where the control cabinet is located, and the terrain where the control cabinet is located is higher than the terrain where the drainage ditch is located;

[0021] The control cabinet is configured to control the opening of the drainage pump when it is detected by the third sensor that the liquid level height of the sump is abnormal, and is configured to, when the third sensor fails, if it is detected by the second sensor that the liquid level height of the drainage ditch is abnormal, control the opening of the drainage pump, and is configured to, when the second sensor fails, if it is detected by the fourth sensor that the liquid level height of the location where the control cabinet is located is abnormal, control the opening of the drainage pump and control the flood prevention secondary water supply system to stop supplying water.

[0022] On the other hand, a water supply control method for a flood prevention secondary water supply system is provided, which is applied to any one of the above-mentioned flood prevention secondary water supply systems. The water supply control method includes:

[0023] When the control cabinet determines that the water pressure of the public water supply network is greater than or equal to the first water pressure threshold, it controls the water supply to the water consumption client through the non-negative pressure water supply branch, and when it determines that the water pressure of the public water supply network is less than the first water pressure threshold, it controls the water supply to the water consumption client through the water storage tank water supply branch, and when it determines that the water pressure in the water outlet pipeline is less than the second water pressure threshold, it controls the opening of the pressurization device, and when it determines that the water pressure in the water outlet pipeline is greater than or equal to the second water pressure threshold, it controls the closing of the pressurization device.

[0024] Through the flood prevention secondary water supply system and its water supply control method provided by this application, when the control cabinet determines that the water pressure of the public water supply network is greater than or equal to the first water pressure threshold, it can control the water supply to the water-using client through the non-negative pressure water supply branch, and when it determines that the water pressure of the public water supply network is less than the first water pressure threshold, it can control the water supply to the water-using client through the water storage tank water supply branch. Therefore, it will not overdraw water from the public water supply network and can also meet the water use requirements of the user client. In addition, when the control cabinet determines that the water pressure in the outlet pipeline is less than the second water pressure threshold, it controls to turn on the pressurization device, and if it determines that the water pressure in the outlet pipeline is greater than or equal to the second water pressure threshold, it controls to turn off the pressurization device, and better meets the actual water pressure requirements of the customer by starting and stopping the pressurization device. Description of the Drawings

[0025] Figure 1 It is a partial structural schematic diagram of the flood prevention secondary water supply system provided by an embodiment of this application;

[0026] Figure 2 It is a flowchart of the water supply control method of the flood prevention secondary water supply system provided by an embodiment of this application. Detailed Embodiments

[0027] In order to make the purpose, technical solutions and advantages of this application clearer, the following further details this application in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0028] An embodiment of this application provides a flood prevention secondary water supply system. Please refer to Figure 1 As shown, it includes a control cabinet 101, a water inlet pipeline connected to the public water supply network, a water storage tank water supply branch and a non-negative pressure water supply branch connected to the outlet end of the water inlet pipeline. The outlet ends of the water storage tank water supply branch and the non-negative pressure water supply branch are sequentially connected to the water-using client through a pressurization pipeline and an outlet pipeline, and a pressurization device for pressurizing the liquid in the pressurization pipeline is arranged on the pressurization pipeline.

[0029] The control cabinet 101 in the embodiment of this application can control to connect one of the water storage tank water supply branch and the non-negative pressure water supply branch to the pressurization pipeline to realize the water supply to the water-using client. Specifically, the control cabinet 101 can be used to control the water supply to the water-using client through the non-negative pressure water supply branch when it determines that the water pressure of the public water supply network is greater than or equal to the first water pressure threshold, and can be used to control the water supply to the water-using client through the water storage tank water supply branch when it determines that the water pressure of the public water supply network is less than the first water pressure threshold.

[0030] In the water storage tank water supply branch in the embodiments of the present application, a water storage tank 102 is included. The public water supply network can store water in the water storage tank 102. Supplying water to the water-using client through the water storage tank water supply branch means delivering the water in the water storage tank 102 to the water-using client. The non-negative pressure water supply branch in the embodiments of the present application may include a surge tank 103. Supplying water to the water-using client through the non-negative pressure water supply branch may be delivering the water from the public water supply network to the water-using client through the surge tank.

[0031] In the first optional embodiment, the control cabinet 101 can determine in real time whether the current water pressure of the public water supply network is greater than or equal to the first water pressure threshold. If so, it immediately controls to supply water to the water-using client through the non-negative pressure water supply branch. If not, it immediately controls to supply water to the water-using client through the water storage tank water supply branch. In this embodiment, by determining the magnitude relationship between the current water pressure of the public water supply network and the first water pressure threshold in real time, the accuracy of the water supply mode selection is improved.

[0032] In the second optional embodiment, the control cabinet 101 can determine in the current time period whether the water pressure of the public water supply network in the next time period is greater than or equal to the first water pressure threshold. If so, it controls to supply water to the water-using client through the non-negative pressure water supply branch when the next time period arrives. Otherwise, it controls to supply water to the water-using client through the water storage tank water supply branch when the next time period arrives. In this embodiment, the water supply mode for the water-using client in the next time period is determined in the current time period. In this way, when the next time period arrives, it can directly control to supply water to the water-using client through the non-negative pressure water supply branch or the water storage tank water supply branch, which can improve the water supply response speed.

[0033] In the above second optional embodiment, the water pressure of the public water supply network in the next time period can be predicted based on the historical water pressure data of the public water supply network. Assume that the next time period is the T1 time period. For example, for the time period from 11:00 to 13:00, the water pressure of the public water supply network in the next T1 time period can be predicted based on the water pressure in the previous T1 time period of the public water supply network. For example, the average value of the water pressure in the previous T1 time period can be used as the water pressure in the next T1 time period, that is, the average value of the water pressure in the previous time period from 11:00 to 13:00 is used as the water pressure in the next time period from 11:00 to 13:00. After predicting the water pressure in the next time period, it is then determined whether the water pressure is greater than or equal to the first water pressure threshold, and then a reasonable water supply mode is selected for the water-using client according to the judgment result to supply water.

[0034] It should be noted that the first water pressure threshold in the embodiments of the present application can be a pre-fixed value. The specific magnitude of this value can be flexibly set by developers according to the water usage situation of the water-using client. For example, it can be set to 0.3 MPa. When the water pressure in the public water supply network is greater than or equal to the first water pressure threshold, it indicates that the water pressure in the public water supply network is large enough to meet the usage requirements of users. Therefore, at this time, the water in the public water supply network can be transported to the non-negative pressure water supply branch to supply water to the water-using client through the non-negative pressure water supply branch. When the water pressure in the public water supply network is less than the first water pressure threshold, it indicates that the water pressure in the public water supply network is small and cannot meet the usage requirements of users. If water is still taken from the public water supply network through the non-negative pressure water supply branch at this time, it may cause negative pressure in the public water supply network. At this time, it is possible to control the water supply to the water-using client through the water storage tank water supply branch, that is, to supply water to the user client through the water storage tank 102.

[0035] It can be understood that the water usage requirements of users are different in different time periods. For example, for a flood prevention secondary water supply system that supplies water to a residential area, the water usage during the working hours from 9:00 to 18:00 is relatively small, and the requirement for the water pressure in the public water supply network is relatively low. While the period from 18:00 to 23:00 is often the peak water usage period, and the requirement for the water pressure in the public water supply network is relatively high. During the period from 23:00 to 9:00, the water consumption of customers decreases again, and the requirement for the water pressure in the public water supply network decreases again. Therefore, the corresponding first water pressure threshold can be preset for different time periods according to the actual water consumption of users in different historical time periods.

[0036] Taking the above first optional implementation manner as an example, the control cabinet 101 can determine the current time period, and judge whether the current water pressure in the public water supply network is greater than or equal to the first water pressure threshold corresponding to the current time period. If so, it immediately controls the water supply to the water-using client through the non-negative pressure water supply branch. If not, it immediately controls the water supply to the water-using client through the water storage tank water supply branch.

[0037] Taking the above second optional implementation manner as an example, the control cabinet 101 can judge whether the water pressure in the public water supply network in the next time period is greater than or equal to the first water pressure threshold corresponding to the time period in the next time period within the current time cycle. If so, it controls the water supply to the water-using client through the non-negative pressure water supply branch when the corresponding time period in the next time period arrives. Otherwise, it controls the water supply to the water-using client through the water storage tank water supply branch when the corresponding time period in the next time period arrives.

[0038] In the embodiment of the present application, the control cabinet 101 can also control the opening or closing of the pressurization device in the pressurization pipeline. Specifically, the control cabinet 101 is configured to control the opening of the pressurization device when it is determined that the water pressure in the outlet pipeline is less than the second water pressure threshold, so as to pressurize the liquid in the pressurization pipeline, and then pressurize the liquid in the outlet pipeline to meet the water use requirements of the water use client. If it is determined that the water pressure in the outlet pipeline is greater than or equal to the second water pressure threshold, the control cabinet 101 controls the closing of the pressurization device to save energy consumption. It should be noted that the second water pressure threshold in the embodiment of the present application can be flexibly set by developers according to the water pressure requirements of the water use client. Generally speaking, the flood prevention secondary water supply system can supply water to each water use client in the building, and the building height is an important factor affecting the water pressure. Therefore, the specific size of the second water pressure threshold can be flexibly set according to the building height.

[0039] Next, the structure of the water supply branch of the water storage tank will be specifically introduced.

[0040] The water supply branch of the water storage tank includes a first water storage tank water supply pipeline connected to the water outlet end of the inlet pipeline, a first valve 104 provided on the first water storage tank water supply pipeline, a water storage tank 102 connected to the water outlet end of the first water storage tank water supply pipeline, a second water storage tank water supply pipeline connected to the water outlet end of the water storage tank 102, and a first sensor 105 for detecting the liquid level height in the water storage tank 102; the control cabinet 101 is configured to control the opening of the first valve 104 to replenish water to the water storage tank 102 when it is detected by the first sensor 105 that the liquid level height in the water storage tank 102 is less than the preset liquid level threshold, and is configured to control the closing of the first valve 104 when it is detected by the first sensor 105 that the liquid level height of the water storage tank 102 is greater than or equal to the preset liquid level threshold. It can be understood that the first sensor 105 in the embodiment of the present application can be a first pressure sensor.

[0041] It should be noted that the first valve 104 in the embodiment of the present application can be a remote control floating ball valve, and the control cabinet 101 can control the opening or closing of the channel for the public water supply network to replenish water to the water storage tank 102 by controlling the opening or closing of the first valve.

[0042] A second valve can also be provided on the second water storage tank water supply pipeline in the embodiment of the present application. The second valve can be a butterfly valve 106. When it is necessary to supply water to the water use client through the water supply branch of the water storage tank, the second valve can be opened to convey the liquid in the water storage tank 102 to the water use client. When it is not necessary to supply water to the water use client through the water supply branch of the water storage tank, the second valve can be closed.

[0043] Since the water in the water storage tank 102 is used to supply water to the water-using client through the water supply branch of the water storage tank, in order to ensure water quality, a disinfection device 107 can also be provided on the water supply pipeline of the water storage tank 102 or the second water storage tank. In order to ensure the water supply lift, a first booster pump 108 can also be provided on the water supply pipeline of the water storage tank 102 or the second water storage tank. The disinfection device 107 can be periodically turned on or off for periodic disinfection. It is also possible that when supplying water to the water-using client through the water supply branch of the water storage tank 102, the control cabinet 101 controls the first booster pump and the disinfection device 107 to be turned on, and when not supplying water to the water-using client through the water supply branch of the water storage tank 102, the control cabinet 101 controls the first booster pump 108 and the disinfection device 107 to be turned off. In order to prevent liquid backflow, a check valve 109 can also be provided on the water supply pipeline of the second water storage tank 102.

[0044] In some embodiments, in order to further ensure the water quality of the water in the water storage tank 102, the control cabinet 101 is also used to control the supply of water to the water-using client through the water supply branch of the water storage tank when it is monitored that water has not been supplied to the water-using client through the water supply branch of the water storage tank for a continuous preset duration. The specific value of the preset duration can be flexibly set by the developer. For example, it can be set to 24h. When the water in the water storage tank 102 has not been used for 24 consecutive hours or has not been supplied to the water-using client for 24 consecutive hours, the water supply branch of the water storage tank can be forcibly started to supply water to the water-using client. After the water circulation in the water storage tank 102 is completed, the water supply to the water-using client is switched to be through the non-negative pressure water supply branch.

[0045] Next, the structure of the non-negative pressure water supply branch will be specifically introduced.

[0046] The non-negative pressure water supply branch can include a first steady flow tank water supply pipeline connected to the water outlet end of the water inlet pipeline, a third valve 110 provided on the first steady flow tank water supply pipeline, a steady flow tank 103 connected to the water outlet end of the first steady flow tank water supply pipeline, and a second steady flow tank water supply pipeline connected to the water outlet end of the steady flow tank 103. When it is necessary to supply water to the water-using client through the non-negative pressure water supply branch, the control cabinet 101 controls the third valve 110 to be opened. When it is not necessary to supply water to the water-using client through the non-negative pressure water supply branch, the control cabinet 101 controls the third valve 110 to be closed. The third valve 110 in the embodiment of the present application can be an electric valve.

[0047] It can be understood that the water outlet ends of the water storage tank water supply branch and the non-negative pressure water supply branch can be connected to the water-using client through different booster pipelines and different water outlet pipelines in sequence. In order to simplify the system pipeline, the water outlet ends of the water storage tank water supply branch and the non-negative pressure water supply branch can be connected to the water-using client through the same booster pipeline and the same water outlet pipeline in sequence, that is, as Figure 1 shown.

[0048] Exemplarily, the pressurization pipeline includes a first pipeline and a second pipeline connected in sequence; a second pressurization pump 111 is provided on the second pipeline; the water inlet end of the first pipeline is connected to the water outlet ends of the water supply branch of the water storage tank and the non-negative pressure water supply branch, the water outlet end of the first pipeline is connected to the water inlet end of the second pipeline, and the water outlet end of the second pipeline is connected to the water inlet end of the water outlet pipeline; the control cabinet 101 is configured to control the second pressurization pump 111 in the second pipeline to be turned on when it is determined that the water pressure in the water outlet pipeline is less than the second preset water pressure threshold, and when the control cabinet 101 determines that the water pressure in the water outlet pipeline is greater than or equal to the second preset water pressure threshold, the second pressurization pump 111 in the second pipeline may not be turned on.

[0049] It should be noted that the first pipeline is equivalent to an intermediate pipeline, which is used to connect the water supply branch of the water storage tank to the second pipeline provided with the second pressurization pump, and at the same time, to connect the non-negative pressure water supply branch to the second pipeline. In some embodiments, the water outlet end of the steady flow tank 103 may be connected to the first pipeline through a rubber hose 112.

[0050] The second pipeline may be a pipeline group, which may include a plurality of working pipelines and a plurality of standby pipelines. The working pipelines are connected in parallel with each other, and the standby pipelines are connected in parallel with each other. The working pipelines and the standby pipelines are also connected in parallel. At this time, the second pressurization pump 111 may be provided on each working pipeline and each standby pipeline. A check valve 109 and a ball valve 113 may also be provided on each second pipeline. Through the ball valve 113, the on-off of the second pipeline can be controlled separately.

[0051] In the first example, the standby pipelines in the second pipeline can be used as the standby for the working pipelines. That is, the control cabinet 101 is configured to control the second pressurization pump 111 in the working pipeline to be turned on and control the second pressurization pump 111 in the standby pipeline to be turned off when it is determined that the water pressure in the water outlet pipeline is less than the second preset water pressure threshold and it is determined that the working pipeline is normal; the control cabinet 101 is configured to control the second pressurization pump in the working pipeline to be turned off and control the second pressurization pump 111 in the standby pipeline to be turned on when it is determined that the water pressure in the water outlet pipeline is less than the second preset water pressure threshold and it is determined that the working pipeline fails.

[0052] It should be noted that in this example, the models of the second pressurization pumps in the standby pipelines and the working pipelines may be exactly the same, and the pipeline structures of the standby pipelines and the working pipelines may be exactly the same. In this way, when there are m faulty working pipelines in the working pipelines, if it is determined that the water pressure in the water outlet pipeline is less than the second preset water pressure threshold, the second pressurization pumps 111 in these m faulty working pipelines can be controlled to be turned off, and at the same time, the second pressurization pumps 111 in m standby pipelines can be controlled to be turned on.

[0053] In the second example, when it is necessary to start the second booster pump 111 in the second pipeline, the switching between the working pipeline and the standby pipeline can be carried out periodically. For example, the second booster pump 111 in the working pipeline can be started first, and the second booster pump 111 in the standby pipeline can be turned off. After running for a preset duration, if it is still necessary to start the second booster pump 111 in the second pipeline, for example, the water pressure in the outlet pipeline is still less than the second preset water pressure threshold at this time, then control to start the second booster pump 111 in the standby pipeline and turn off the second booster pump in the working pipeline. When the non-negative pressure water supply branch and the water storage tank water supply branch are connected to the water use client through the same booster pipeline, since the booster pipeline may need to work for a long time, at this time, one of the working pipeline and the standby pipeline is periodically connected to the flood prevention secondary water supply system, which improves the service life of the entire booster pipeline.

[0054] In the embodiment of the present application, the control cabinet 101 is further configured to control to turn off the second booster pump 111 in the second pipeline when it is determined that the water pressure in the first pipeline is less than the third water pressure threshold. When the second pipeline includes multiple working pipelines and multiple standby pipelines, the second booster pumps 111 in all the working pipelines and standby pipelines can be turned off to avoid dry running of the second booster pump and cause irreversible damage to the second booster pump 111. The third water pressure threshold in the embodiment of the present application can be flexibly set by the developer. Exemplarily, the third water pressure threshold can be determined according to the water pressure requirement of the water use client and the water pressure that can be increased when all the second booster pumps 111 are working. For example, the third water pressure threshold can be determined according to P3≤P1 - P2, where P3 represents the third water pressure threshold, P1 represents the minimum water pressure in the outlet pipeline when meeting the water use requirement of the water use client, and P2 represents the maximum water pressure that can be increased corresponding to the second booster pumps 111 that can be started simultaneously in the second pipeline.

[0055] Exemplarily, the flood prevention secondary water supply system may further include a first flowmeter 114 provided on the inlet pipeline and a second flowmeter 115 provided on the outlet pipeline; the control cabinet 101 is configured to give an alarm prompt when it is determined that the difference between the first flow value measured by the first flowmeter 114 and the second flow value measured by the second flowmeter 115 is greater than a preset flow difference threshold.

[0056] Specifically, a PLC module is provided in the control cabinet 101. The signals output by the first flowmeter 114 and the second flowmeter 115 can be judged by the PLC module. When the flow difference is greater than the preset flow difference threshold, the PLC module outputs an alarm signal. After the gateway collects the alarm signal, it can be transmitted to the cloud platform for alarm. The cloud platform can send relevant alarm information to the mobile APP of the monitoring personnel or the computer client. The monitoring personnel can monitor the situation of the flood prevention secondary water supply system in real time and judge whether it is normal. If it is normal, the monitoring personnel can cancel the alarm remotely; if it is abnormal, the monitoring personnel can issue an instruction through the mobile APP or the computer client to remotely control and shut down the flood prevention secondary water supply system.

[0057] In some embodiments, a drainage ditch may be further provided around the location where the flood prevention secondary water supply system is located. The drainage ditch is connected to a sump, and the terrain where the sump is located is lower than the terrain where the drainage ditch is located. A second sensor is provided in the drainage ditch, and a third sensor and a drainage pump are provided in the sump. It can be understood that only one drainage pump may be provided in the sump, or at least two drainage pumps may be provided to form a drainage pump group. For example, two drainage pumps can be provided as backups for each other. When one of the drainage pumps malfunctions, the other drainage pump can be started for drainage. A fourth sensor is provided at the location where the control cabinet 101 is located, and the terrain where the control cabinet is located is higher than the terrain where the drainage ditch is located.

[0058] The control cabinet is used to control the opening of the drainage pump when the liquid level height of the sump is detected to be abnormal by the third sensor. When the third sensor fails, if the liquid level of the drainage ditch is detected to be abnormal by the second sensor, the drainage pump is controlled to be opened. When both the second sensor and the third sensor fail, if the liquid level height of the location where the control cabinet 101 is located is detected to be abnormal by the fourth sensor, the drainage pump is controlled to be opened and the flood prevention secondary water supply system is controlled to stop supplying water.

[0059] Exemplarily, a first liquid level controller 116, a second liquid level controller 117, and a third liquid level controller 118 can be respectively provided at the locations of the drainage ditch, the sump, and the control cabinet 101. The second sensor can send the detection result to the first liquid level controller 116, and the first liquid level controller 116 judges whether the liquid level height of the drainage ditch is abnormal and sends the judgment result to the control cabinet 101. Similarly, the third sensor can send the detection result to the second liquid level controller 117, and the second liquid level controller 117 judges whether the liquid level height of the sump is abnormal and sends the judgment result to the control cabinet 101. Similarly, the fourth sensor can send the detection result to the third liquid level controller 118, and the third liquid level controller 118 judges whether the liquid level height of the location where the control cabinet 101 is located is abnormal and sends the judgment result to the control cabinet 101.

[0060] It is assumed that a first drainage pump and a second drainage pump are arranged in the sump. The first drainage pump is the main pump, and the second drainage pump is the standby pump of the first drainage pump. When the second liquid level controller 117 of the sump is triggered, that is, when the liquid level height of the sump is detected to be abnormal by the third sensor, the second liquid level controller 117 can transmit this signal to the PLC module. The PLC module makes a judgment and controls the first drainage pump to be turned on to drain the water out of the pump house. If the first drainage pump is abnormal at this time, the second drainage pump can be turned on. After the second liquid level controller 117 of the sump fails, the first liquid level controller 116 of the drainage ditch is enabled. Similarly, when it is triggered, that is, when the liquid level height of the drainage ditch is detected to be abnormal by the second sensor, the first drainage pump is turned on to drain the water out of the pump house. Similarly, if the first drainage pump is abnormal at this time, the second drainage pump can be turned on. When the third liquid level controller 118 of the control cabinet 101 is started, it indicates that the environment and equipment safety are involved. The system issues a command, and at this time, all the drainage pumps in the sump can be started, that is, the first drainage pump and the second drainage pump are both started to drain the water faster, and the rest of the equipment stops running, and the anti-flood secondary water supply system is controlled to stop supplying water.

[0061] It should be noted that in other embodiments, multiple drainage pumps can be arranged in the sump. When only the liquid level in the sump is detected to be abnormal, a drainage pumps in the sump can be turned on. When only the liquid level in the drainage ditch is detected to be abnormal, b drainage pumps in the sump can be turned on. When only the liquid level at the location of the control cabinet is detected to be abnormal, c drainage pumps in the sump can be turned on, where a < b < c. Of course, it can be understood that drainage pumps can also be respectively arranged at the locations of the drainage ditch and the control cabinet to prevent the system from being unable to drain water normally due to all the drainage pumps in the sump being abnormal, resulting in the equipment being flooded.

[0062] Finally, it should be noted that in the embodiment of the present application, a fifth sensor 119 can be arranged on the water inlet pipeline. Through the fifth sensor 119, the water pressure of the public water supply network can be measured, and then it can be judged whether the water pressure of the public water supply network is greater than or equal to the first water pressure threshold. Similarly, a sixth sensor 120 can be arranged on the water outlet pipeline. Through the sixth sensor 120, the water pressure of the water outlet pipeline can be measured, and then it can be judged whether the water pressure of the water outlet pipeline is less than the second water pressure threshold. Similarly, a seventh sensor 121 can be arranged on the first pipeline of the booster pipeline. Through the seventh sensor 121, the water pressure of the first pipeline can be measured, and then it can be judged whether the water pressure of the first pipeline is less than the third water pressure threshold. Among them, the fifth sensor 119, the sixth sensor 120, and the seventh sensor 121 can all be pressure sensors.

[0063] Based on the above flood prevention secondary water supply system, an embodiment of the present application further provides a water supply control method for the flood prevention secondary water supply system, and the water supply control method includes:

[0064] When the control cabinet determines that the water pressure of the public water supply network is greater than or equal to the first water pressure threshold, it controls the water supply to the water use client through the non-negative pressure water supply branch, and when it determines that the water pressure of the public water supply network is less than the first water pressure threshold, it controls the water supply to the water use client through the water storage tank water supply branch, and when it determines that the water pressure in the water outlet pipeline is less than the second water pressure threshold, it controls to turn on the booster device, and when it determines that the water pressure in the water outlet pipeline is greater than or equal to the second water pressure threshold, it controls to turn off the booster device.

[0065] The corresponding specific process block diagram can be referred to Figure 2 as shown, and it can include the following contents:

[0066] S1: Supply water from the public water supply network.

[0067] When supplying water through the public water supply network, if it is detected that the water pressure of the public water supply network meets the water use demand, then go to step S2 and step S3.

[0068] S2: Supply water to the water use client through the non-negative pressure water supply branch.

[0069] S3: Refill the water storage tank.

[0070] S4: Stop refilling when the liquid level of the water storage tank reaches the required level.

[0071] After stopping refilling, if it is detected that the water pressure of the public water supply network does not meet the water use demand, go to step S5 and step S6, and if it is detected that the water in the water storage tank has not been recycled within a specified time, go to step S8 and step S9.

[0072] S5: Close the non-negative pressure water supply branch.

[0073] S6: The disinfection device works and the first booster pump starts.

[0074] S7: Supply water to the water use client through the water storage tank water supply branch.

[0075] S8: The first valve opens or closes according to the liquid level of the water storage tank.

[0076] Specifically, the first valve can be opened when the liquid level height in the water storage tank is less than the preset liquid level threshold to refill the water storage tank, and the first valve can be closed when the liquid level height in the water storage tank is greater than or equal to the preset liquid level threshold.

[0077] S9: Close the non-negative pressure water supply branch.

[0078] S10: The disinfection device operates and the first booster pump starts.

[0079] In step S10, the water in the water storage tank can be transported to the water-using client through the first booster pump.

[0080] S11: The water supply branch of the water storage tank supplies water to the water-using client.

[0081] Through the anti-flood secondary water supply system and its water supply control method provided by the embodiments of the present application, when the water pressure of the public water supply network meets the use requirements, the non-negative pressure water supply branch is used for water supply. When the water pressure of the public water supply network does not meet the use requirements, the water supply method is switched to achieve long-term water supply, without forming excessive water intake from the public water supply network and without affecting the water use of surrounding users; the system can switch automatically according to the actual situation to avoid stagnant water in the water storage tank; the system is equipped with disinfection equipment to ensure water use safety; the system can replenish water in segments according to the actual water use situation; when the demand for water use by the water-using client drops to a certain level, it can be supplied with water by the pressure of the public water supply network or by the booster pump of the water storage tank; the liquid level controllers at the drainage ditch, sump pit and control cabinet ensure the safety of the equipment and the environment.

[0082] It should be understood that although the steps in the above flow chart are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover, at least a part of the steps in the above flow chart may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or sub-steps or stages of other steps.

[0083] It should be noted that the illustrations provided in this embodiment only schematically illustrate the basic concept of the present invention. Therefore, only the components related to the present invention are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The types, quantities, and proportions of the components in actual implementation can be arbitrarily changed, and the layout type of the components may also be more complex. The structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Therefore, they do not have a substantial technical meaning. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear description and are not used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the present invention can be implemented.

[0084] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0085] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A flood prevention secondary water supply system, characterized in that, The water supply system includes a control cabinet, a water inlet pipeline connected to the public water supply network, a water storage tank water supply branch and a non-negative pressure water supply branch connected to the water outlet end of the water inlet pipeline. The water outlet ends of the water storage tank water supply branch and the non-negative pressure water supply branch are sequentially connected to a water use client through a pressurization pipeline and a water outlet pipeline. A pressurization device for pressurizing the liquid in the pressurization pipeline is provided on the pressurization pipeline; The control cabinet is used to control the water supply to the water use client through the non-negative pressure water supply branch when it is determined that the water pressure of the public water supply network is greater than or equal to the first water pressure threshold, and is used to control the water supply to the water use client through the water storage tank water supply branch when it is determined that the water pressure of the public water supply network is less than the first water pressure threshold; The control cabinet is further used to control the activation of the pressurization device when it is determined that the water pressure in the water outlet pipeline is less than the second water pressure threshold, and to control the shutdown of the pressurization device if it is determined that the water pressure in the water outlet pipeline is greater than or equal to the second water pressure threshold.

2. The anti-flood secondary water supply system according to claim 1, wherein The water storage tank water supply branch includes a first water storage tank water supply pipeline connected to the water outlet end of the water inlet pipeline, a first valve provided on the first water storage tank water supply pipeline, a water storage tank connected to the water outlet end of the first water storage tank water supply pipeline, a second water storage tank water supply pipeline connected to the water outlet end of the water storage tank, and a first sensor for detecting the liquid level height in the water storage tank; The control cabinet is used to control the opening of the first valve to replenish water to the water storage tank when the liquid level height is detected to be less than a preset liquid level height threshold by the first sensor, and is used to control the closing of the first valve when the liquid level height is detected to be greater than or equal to the preset liquid level height threshold by the first sensor.

3. The anti-flood secondary water supply system according to claim 2, characterized in that, The water storage tank water supply branch further includes a first booster pump and a disinfection device provided on the water storage tank or the second water storage tank water supply pipeline; The control cabinet is further used to control the activation of the first booster pump and the disinfection device when supplying water to the water use client through the water storage tank water supply branch.

4. The anti-flood secondary water supply system according to claim 1, characterized in that, The control cabinet is further used to control the water supply to the water use client through the water storage tank water supply branch when it is monitored that the water supply to the water use client through the water storage tank water supply branch has not occurred for a continuous preset duration.

5. The anti-flood secondary water supply system according to claim 1, wherein, The pressurization pipeline includes a first pipeline and a second pipeline connected in sequence; a second booster pump is provided on the second pipeline; The water inlet end of the first pipeline is connected to the water outlet ends of the water storage tank water supply branch and the non-negative pressure water supply branch. The water outlet end of the first pipeline is connected to the water inlet end of the second pipeline. The water outlet end of the second pipeline is connected to the water inlet end of the water outlet pipeline; The control cabinet is used to control the activation of the second booster pump in the second pipeline when it is determined that the water pressure in the water outlet pipeline is less than the second preset water pressure threshold.

6. The anti-flood secondary water supply system according to claim 5, wherein The second pipeline includes a working pipeline and a standby pipeline connected in parallel with the working pipeline. Second booster pumps are provided on both the working pipeline and the standby pipeline; The control cabinet is used to control the opening of the second booster pump in the working pipeline and control the closing of the second booster pump in the standby pipeline when it is determined that the water pressure in the outlet pipeline is less than the second preset water pressure threshold and the working pipeline is normal; The control cabinet is used to control the closing of the second booster pump in the working pipeline and control the opening of the second booster pump in the standby pipeline when it is determined that the water pressure in the outlet pipeline is less than the second preset water pressure threshold and the working pipeline fails.

7. The anti-flood secondary water supply system according to claim 5, characterized in that, The control cabinet is further used to control the closing of the second booster pump in the second pipeline when it is determined that the water pressure in the first pipeline is less than the third water pressure threshold.

8. The anti-flood secondary water supply system according to claim 1, characterized in that, The flood-preventing secondary water supply system further includes a first flow meter arranged on the inlet pipeline and a second flow meter arranged on the outlet pipeline; the control cabinet is used to give an alarm prompt when it is determined that the difference between the first flow value measured by the first flow meter and the second flow value measured by the second flow meter is greater than the preset flow difference threshold.

9. The anti-flood secondary water supply system according to claim 1, wherein, Drainage ditches are arranged around the location where the flood-preventing secondary water supply system is located. The drainage ditches are connected to a sump, and the terrain where the sump is located is lower than the terrain where the drainage ditches are located. A second sensor is arranged in the drainage ditches, a third sensor and a drainage pump are arranged in the sump, a fourth sensor is arranged at the location where the control cabinet is located, and the terrain where the control cabinet is located is higher than the terrain where the drainage ditches are located; The control cabinet is used to control the opening of the drainage pump when the liquid level height of the sump is detected to be abnormal by the third sensor, and is used to control the opening of the drainage pump when the third sensor fails and the liquid level height of the drainage ditches is detected to be abnormal by the second sensor, and is used to control the opening of the drainage pump and control the flood-preventing secondary water supply system to stop supplying water when the liquid level height of the location where the control cabinet is located is detected to be abnormal by the fourth sensor when the second sensor fails.

10. A water supply control method for a flood prevention secondary water supply system, characterized in that, Applied to the flood-preventing secondary water supply system according to any one of claims 1-9, the water supply control method includes: When the control cabinet determines that the water pressure of the public water supply network is greater than or equal to the first water pressure threshold, it controls the water supply to the water consumption client through the non-negative pressure water supply branch, and when it determines that the water pressure of the public water supply network is less than the first water pressure threshold, it controls the water supply to the water consumption client through the water storage tank water supply branch, and when it determines that the water pressure in the outlet pipeline is less than the second water pressure threshold, it controls the opening of the booster device, and when it determines that the water pressure in the outlet pipeline is greater than or equal to the second water pressure threshold, it controls the closing of the booster device.

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