A new safe and reliable water supply system for high-rise buildings

Abstract

The present invention discloses a novel safe and reliable high-rise building water supply system, which is composed of a water supply module and an intelligent control module. The water supply module includes a water storage tank and a water pump unit, and the intelligent control module includes a PLC control module, a flow measurement module and a pressure measurement module. A liquid level sensor is provided inside the water storage tank to detect the water level of the water storage tank in real time to ensure that the liquid level of the water storage tank is above the threshold of the water storage tank. A terminal pressure measuring device and an initial flow measuring device are provided to monitor and record the actual flow head requirements of the building in real time, control the frequency converter to change the motor output frequency of the water pump, and ensure constant pressure water supply. The PLC control module uses intelligent main and auxiliary control technology, and the intelligent main and auxiliary system and the main and standby flow and pressure sensors are linked and controlled, with hot standby redundancy. The present invention solves the problems of unstable water supply pressure and secondary pollution in high-rise buildings, avoids excessive risk of single system control, and realizes self-fault diagnosis.

Description

Technical Field

[0001] The present invention belongs to the field of building water supply, and in particular relates to a new safe and reliable high-rise building water supply system that can intelligently optimize and adjust according to real-time monitoring of actual needs and can perform fault diagnosis, emergency warning and intelligent accident handling. Background Art

[0002] With the continuous development of modern society, the phenomenon of increasing shortage of land resources and a sharp increase in the number of high-rise residential buildings will become the norm. As residential buildings become taller, it also brings certain difficulties to the water supply of buildings. Since high-rise residential buildings have concentrated residents and large water consumption, secondary water supply facilities are needed to ensure their daily water use. In view of the various types of secondary water supply equipment products and the many problems in the current status of urban secondary water supply, choosing a secondary water supply method with both stability and economy has become a topic that relevant companies need to solve urgently.

[0003] In general, water supply methods include municipal direct water supply, water tank water supply, secondary booster pump water supply and constant pressure water supply. However, municipal direct water supply and water tank water supply are generally only suitable for floors below the sixth floor. Floors above the seventh floor are prone to insufficient pressure supply, which affects the normal life and use of high floors. The water tank water supply method also requires the establishment of a special water storage tank, which occupies land and is prone to secondary pollution, and the cost is high. If a secondary booster pump is installed, the water supply method consumes a lot of electricity, the cost is high, and it is easy to cause a large water pressure shock on the lower floors, the pressure is unstable, the water pipes are easy to burst or the faucets are easy to be damaged, and residents are prone to discomfort when using water. The constant pressure water supply system of the building is both energy-saving and can provide constant water supply, and has a low failure rate, high water supply efficiency, good quality, intelligence and controllability. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a new type of safe and reliable high-rise building water supply system, which is equipped with a terminal pressure measuring device and an initial flow measuring device, monitors and records the actual flow head requirements of the building in real time, controls the frequency converter through intelligent voltage conversion control technology, and ensures constant pressure water supply. At the same time, it has a self-fault diagnosis and emergency warning monitoring device for intelligent accident handling. The present invention is mainly used in high-rise building water supply to solve the problems of unstable water supply pressure, pressure fluctuations during peak water use and low water use, secondary pollution, high cost, etc.

[0005] The invention consists of a water supply module and an intelligent control module.

[0006] The water supply module comprises a water storage tank and a water pump unit.

[0007] The intelligent control module includes a PLC control module, a flow measurement module and a pressure measurement module.

[0008] The water storage tank is completely closed, and its water inlet is directly connected to the municipal pipe network for water storage. It is responsible for supplying water to the water pump unit, mainly ensuring water supply for high-rise users.

[0009] Furthermore, there is a liquid level sensor inside the water tank for real-time detection of the water level in the water tank, and the liquid level information is sent to the PLC control module through the liquid level transmitter. The PLC control module controls to ensure that the water level in the water tank remains above the threshold of the water tank.

[0010] Furthermore, the threshold of the water storage tank is set according to the actual water demand of users, and changes intelligently for different periods such as peak water usage period and low water usage period.

[0011] The water pump unit is composed of four water pumps, three of which are used as actual working pumps and one is used as a standby pump for emergency replacement when a water pump fails.

[0012] Furthermore, depending on the actual floor height, two or more water pump units can be built to achieve zoned water supply.

[0013] Furthermore, each of the four water pumps is equipped with a frequency converter, which is used to change the motor output frequency of the three water pumps that are actually working, thereby adjusting the motor speed and controlling the rotation of the working water pumps. For different water use periods, uninterrupted intelligent changes can be made from fully shutting down the water pumps to running the three water pumps actually working at full power, thereby achieving constant pressure water supply for different water use conditions.

[0014] The flow measurement module is installed at the initial end of the building water supply network, i.e., the outlet end of the water pump unit. The main (backup) flow sensor measures the flow at the initial end of the building water supply network in real time, and sends the measured flow signal to the PLC control module through the flow transmitter to monitor the user's water consumption in real time. When the main flow sensor fails, it will switch to the backup flow sensor for operation.

[0015] The pressure measurement module is installed at the building water supply network terminal, i.e., the user end. The main (backup) pressure sensor measures the terminal pressure of the building water supply network in real time, and sends the measured pressure signal to the PLC control module through the pressure transmitter to monitor the user's head demand in real time. When the main pressure sensor fails, it will switch to the backup pressure sensor for operation.

[0016] Furthermore, the PLC control module receives the initial flow signal and terminal pressure signal of the building water supply network, and obtains the required operating pressure by intelligently adjusting the voltage gradient and calibration deviation according to the flow change and actual head requirements, simulates the on-site operation curve, evaluates the flow size in real time, and performs voltage operation.

[0017] Furthermore, the actual water consumption is intelligently assessed in real time based on the simulated on-site operation curve, and the water storage tank threshold is set accordingly.

[0018] Furthermore, according to the simulated on-site operation curve, the inverter output power is controlled and the water pump speed is adjusted to achieve constant pressure water supply.

[0019] Furthermore, the PLC control module intelligently evaluates the feedback information from the flow sensor and pressure sensor, and performs fault diagnosis on the building water supply network: if the measuring instrument is damaged, it switches to the backup instrument; if cavitation occurs in the water pump, it controls the inverter to adjust the water pump power to control the flow; if there is a water pipe leak, it feedbacks to the corresponding maintenance company.

[0020] Furthermore, the PLC control module uses intelligent main-auxiliary control technology, the intelligent main-auxiliary system and the main-standby flow and main-standby pressure sensors are linked for control, and hot standby redundancy. When the main system of the PLC control module fails, it will switch to the auxiliary system for operation.

[0021] The beneficial effects of the present invention are as follows: a terminal pressure measuring device and an initial flow measuring device are provided to monitor and record the actual flow and head requirements of the building in real time, and the frequency converter is controlled by intelligent voltage conversion control technology to ensure constant pressure water supply; the flow sensor and the pressure sensor will switch to the backup sensor for operation when the main sensor fails; the control system realizes intelligent main and auxiliary system hot standby redundancy, and when the main system fails, it will instantly switch to the auxiliary system for operation, solving the problem of excessive risk of single system control; the PLC control module intelligently evaluates the feedback information of the flow sensor and the pressure sensor, performs fault diagnosis, and takes emergency warnings for faults, and adopts different intelligent accident handling measures. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of a new safe and reliable building water supply method. DETAILED DESCRIPTION

[0023] like Figure 1 As shown, this embodiment includes a water storage tank 1, a water pump unit 2, a main (spare) flow sensor 3, a main (spare) pressure sensor 4, a flow transmitter 5, a pressure transmitter 6, a frequency converter 7, a PLC control module 8, a motor 9, a liquid level transmitter 10 and a liquid level sensor 11.

[0024] The water supply method of this embodiment is to supply water by zones. For low-rise users (generally the first to sixth floors), municipal water is directly supplied. For high-rise users (above the seventh floor), corresponding water pump units 2 are set for every six floors according to the specific building height.

[0025] This embodiment consists of a water supply module and an intelligent control module.

[0026] The water supply module includes a water storage tank 1 and a water pump unit 2.

[0027] The intelligent control module includes a PLC control module 8, a flow measurement module and a pressure measurement module.

[0028] The water storage tank 1 is completely closed and does not come into contact with impurities such as air. Its water inlet is directly connected to the municipal pipe network for water storage. It is responsible for supplying water to the water pump unit, mainly to ensure water use for high-rise users.

[0029] The specific water supply method is that the PLC control module 8 transmits the network flow signal through the flow transmitter 5 according to the flow measured by the main (spare) flow sensor 3 at the initial end of the building water supply network, i.e., the water pump outlet, and the building water supply network terminal pressure signal through the pressure transmitter 6 according to the pressure measured by the main (spare) pressure sensor 4 at the end of the building water supply network, i.e., the user end. According to the flow change and actual head requirements, the voltage gradient and calibration deviation are intelligently adjusted to simulate the on-site operation curve, evaluate the flow size in real time, and perform voltage operation.

[0030] The water level threshold of the water storage tank 1 is optimized in real time and intelligently. The liquid level is monitored by the liquid level sensor 11, and real-time feedback is provided through the liquid level transmitter 10 to ensure that the liquid level of the water storage tank remains above the water storage tank threshold. The threshold of the water storage tank is set according to the actual water demand of the user, and changes intelligently for different periods such as peak water use period and low water use period, so as to avoid secondary pollution of water resources caused by long-term water storage in the water storage tank and improve the utilization rate of water resources.

[0031] Furthermore, based on the simulated on-site operation curve, the actual water consumption is intelligently evaluated in real time, and the real-time threshold of the water storage tank is set accordingly.

[0032] The water pump unit 2 consists of four water pumps, each of which is equipped with a frequency converter. The PLC control module controls the output power of the water pump unit 2 by intelligently adjusting the output power of the frequency converter 7 and controlling the speed of the motor 9. According to different water use periods, the uninterrupted intelligent change from all water pumps being turned off to the three water pumps actually working running at full power is realized to solve the problem of unstable water supply pressure, pressure fluctuations during peak water use periods and low water use periods, ensure constant pressure water supply for buildings, and improve water supply efficiency.

[0033] Furthermore, according to the simulated on-site operation curve, the PLC control module controls the inverter output power, adjusts the water pump speed, and realizes constant pressure water supply.

[0034] The water pump unit 2 has four water pumps, three of which are used as actual working pumps and one as a standby pump for emergency replacement in case of water pump failure. In addition, two or more water pump units can be built according to the actual floor height to achieve zoned water supply.

[0035] The flow measurement module is installed at the initial end of the building water supply network, i.e., the outlet end of the water pump unit. The main (backup) flow sensor 3 measures the flow at the initial end of the building water supply network in real time, and sends the measured flow signal to the PLC control module 8 through the flow transmitter 5 to monitor the user's water consumption in real time. When the main flow sensor fails, it will switch to the backup pressure sensor for operation.

[0036] The pressure measurement module is installed at the terminal of the building water supply network, i.e. the user end. The main (backup) pressure sensor 4 measures the terminal pressure of the building water supply network in real time, and sends the measured pressure signal to the PLC control module 8 through the pressure transmitter 6 to monitor the user's head demand in real time. When the main pressure sensor fails, it will switch to the backup pressure sensor for operation.

[0037] The PLC control module 8 intelligently evaluates the feedback information of the flow sensor 3 and the pressure sensor 4, performs fault diagnosis on the building water supply network, issues fault emergency warnings for abnormal changes (sudden increases or decreases) in the flow or head measurement data, determines the cause of the fault through data analysis, and switches to a backup instrument if the measuring instrument is damaged; if cavitation occurs in the water pump, controls the inverter 7 to adjust the power of the water pump 2 to control the flow; if there is a water pipe leak, feedback is given to the corresponding maintenance company.

[0038] The PLC control module 8 uses intelligent main-auxiliary control technology, and the intelligent main-auxiliary system and the main-standby flow and standby pressure sensors are linked for control and hot standby redundancy. When the main system of the PLC control module 8 fails, it will switch to the auxiliary system to operate, solving the problem of excessive risk of single system control.

Claims

1. A new type of safe and reliable high-rise building water supply system, characterized by: It consists of a water supply module and an intelligent control module; The water supply module includes a water storage tank and a water pump unit; The intelligent control module includes a PLC control module, a flow measurement module and a pressure measurement module; The water storage tank is completely closed, and its water inlet is directly connected to the municipal pipe network for water storage and is responsible for supplying water to the water pump unit; The water tank is provided with a liquid level sensor inside, which sends the liquid level information to the PLC control module through the liquid level transmitter, and the PLC control module controls the liquid level of the water tank to be kept above the threshold of the water tank; The water pumps in the water pump unit are each equipped with a frequency converter, which changes the output frequency of the water pump motor through the frequency converter, thereby adjusting the motor speed and controlling the rotation of the working water pump; The flow measurement module is installed at the initial end of the building water supply network, i.e., the outlet end of the water pump unit. The flow sensor measures the flow at the initial end of the building water supply network in real time, and sends the measured flow signal to the PLC control module through the flow transmitter to monitor the user's water consumption in real time. The pressure measurement module is installed at the terminal of the building water supply network, i.e., the user end. The pressure sensor measures the terminal pressure of the building water supply network in real time, and sends the measured pressure signal to the PLC control module through the pressure transmitter to monitor the user's head demand in real time. The PLC control module receives the initial flow signal and terminal pressure signal of the building water supply network, and obtains the required operating pressure by intelligently adjusting the voltage gradient and calibrating the deviation according to the flow change and actual head requirement, simulates the on-site operation curve, evaluates the flow size in real time, and performs voltage operation; According to the simulated on-site operation curve, the PLC control module intelligently evaluates the actual water consumption in real time and sets the water storage tank threshold accordingly; According to the simulated on-site operation curve, the PLC control module controls the inverter output power, adjusts the water pump speed, and realizes constant pressure water supply.

2. A new type of safe and reliable high-rise building water supply system according to claim 1, characterized in that: The water storage tank threshold is set according to the actual water demand of the user, and changes intelligently during different periods of peak water use and low water use.

3. A new type of safe and reliable high-rise building water supply system according to claim 1, characterized in that: The water pump unit is composed of four water pumps, three of which are used as actual working pumps and one as a standby pump; According to different water use periods, it can realize uninterrupted intelligent change from shutting down all water pumps to running all three water pumps at full power; According to the actual floor height, build two or more water pump units to achieve zoned water supply.

4. A new type of safe and reliable high-rise building water supply system according to claim 1, characterized in that: The flow sensor is composed of a main flow sensor and a backup flow sensor. When the main flow sensor fails, the backup flow sensor is switched to operate. The pressure sensor is composed of a main flow sensor and a backup flow sensor. When the main pressure sensor fails, the operation is switched to the backup pressure sensor.

5. According to claim 1, a new type of safe and reliable high-rise building water supply system is characterized by: The PLC control module intelligently evaluates the feedback information of the flow sensor and the pressure sensor, and performs fault diagnosis on the building water supply network: if the measuring instrument is damaged, it switches to the backup instrument; if cavitation occurs in the water pump, it controls the inverter to adjust the water pump power to control the flow; if there is a water pipe leak, it feeds back to the maintenance company.

6. A new type of safe and reliable high-rise building water supply system according to claim 1, characterized in that: The PLC control module uses intelligent main-auxiliary control technology, and when the main system of the PLC control module fails, it switches to the auxiliary system for operation.

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