Civil secondary water supply energy-saving system

Abstract

The utility model discloses a civil secondary water supply energy-saving system which comprises a pressurized water supply mechanism, a first water pump, a second water pump and a water pump switching mechanism. The pressurizing water supply mechanism is used for pressurizing water in an urban main water supply system and then supplying water to users; the first water pump and the second water pump are respectively used for inputting water in an urban main water supply system into the pressurized water supply mechanism; when the power utilization time is in a peak period, the water pump switching mechanism controls the second water pump to work; and when the power utilization time is in a valley period, the water pump switching mechanism controls the first water pump to work. According to the civil secondary water supply energy-saving system, the lithium battery pack energy storage device is introduced, off-peak electricity is fully used for supplying water, the operation electric charge of the secondary water supply system is reduced, and the electric energy utilization rate is increased. Meanwhile, the problem that water is cut off during power failure is solved, and continuous and stable work of a secondary water supply system is guaranteed.

Description

Technical Field

[0001] The utility model relates to a civil secondary water supply energy-saving system, belonging to the technical field of urban water supply. Background Art

[0002] At present, in modern urban water supply, secondary water supply is to pressurize the water in the main urban water supply system through equipment to meet the needs of high-rise buildings or long-distance water supply. Secondary water supply equipment is an indispensable part of the water supply system. For secondary water supply equipment that runs every day and consumes a lot of electricity, improving power efficiency, reducing energy consumption, and saving electricity are the most concerned indicators.

[0003] The secondary water supply system is generally a three-pump device, two working water pumps and one auxiliary water pump. The secondary water supply system of the prior art has at least the following problems:

[0004] (1) Power outages will lead to water outages. Since the secondary water supply pump requires normal voltage power supply, the pump will not work after a power outage, resulting in water outage.

[0005] (2) Generally, the peak / valley period of water consumption and the peak / valley period of electricity consumption overlap. During the peak period of electricity consumption, water consumption is high and electricity prices are high. During the trough period of electricity consumption, water consumption is low and electricity prices are low, resulting in higher secondary water supply charges. According to statistics, the country wastes 50 billion kWh of electricity during the trough period of electricity consumption each year, and the utilization rate of electricity is low. Summary of the invention

[0006] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art, provide a civilian secondary water supply energy-saving system, introduce a lithium battery pack energy storage device, make full use of valley electricity for water supply, reduce the electricity cost of the secondary water supply system, and improve the utilization rate of electric energy. At the same time, it overcomes the problem of water outage when power outage occurs, and ensures the continuous and stable operation of the secondary water supply system.

[0007] In order to solve the above technical problems, the technical solution of the utility model is:

[0008] A civil secondary water supply energy-saving system comprises: a pressurized water supply mechanism, a first water pump, a second water pump and a water pump switching mechanism;

[0009] The pressurized water supply mechanism is used to pressurize the water in the city's main water supply system and then supply water to users;

[0010] The first water pump and the second water pump are respectively used to input water from the city's main water supply system into the pressurized water supply mechanism;

[0011] When the electricity consumption time is in the peak period, the water pump switching mechanism controls the second water pump to work; when the electricity consumption time is in the valley period, the water pump switching mechanism controls the first water pump to work.

[0012] Further, the water pump switching mechanism includes a power supply network, a lithium battery pack, a processor, a charger, a discharge module, a first relay and a second relay;

[0013] The input end of the charger is connected to the power supply network, the output end of the charger is connected to the lithium battery pack, the input end of the discharge module is connected to the lithium battery pack, the first output end of the discharge module is connected to the second water pump through the first relay, and the second output end of the discharge module is connected to the processor;

[0014] The power supply network is connected to the first water pump via a second relay;

[0015] The processor is connected to a charger, and the charger receives a charging instruction sent by the processor;

[0016] The processor is connected to the signal control ends of the first relay and the second relay respectively, and the processor controls the on and off of the first relay and the second relay.

[0017] Furthermore, the civil secondary water supply energy-saving system also includes a display screen, which is connected to the processor and is a touch screen. The display screen is used to set the peak power time and valley power time of the country or city where the civil secondary water supply energy-saving system is located.

[0018] Furthermore, the civil secondary water supply energy-saving system also includes a backup water pump, which is used to input water in the city's main water supply system into the pressurized water supply mechanism when the first water pump fails.

[0019] Furthermore, the civil secondary water supply energy-saving system also includes a third relay, the power supply network is connected to the backup water pump through the third relay, the processor is connected to the signal control end of the third relay, and the processor controls the on and off of the third relay.

[0020] Furthermore, the civil secondary water supply energy-saving system also includes a flow regulator, the input end of the flow regulator is connected to the water in the city's main water supply system, and the output end of the flow regulator supplies water to the first water pump, the backup water pump and the second water pump respectively.

[0021] Furthermore, a filter is provided at the input end of the current regulator, and the filter is a Y-type filter.

[0022] Furthermore, a negative pressure suppressor is provided on the flow regulator.

[0023] The above technical solution is adopted. The utility model adds a lithium battery pack as an energy storage module and adds a second water pump. During the peak period of electricity consumption, the lithium battery pack supplies power to the second water pump, so that the second water pump supplies water to the pressure tank. During the low electricity consumption period, the lithium battery pack is charged and stored, and the first water pump supplies water to the pressure tank. In this way, the cheap electricity stored during the low electricity consumption period can be used during the peak electricity consumption period, avoiding the waste of electricity during the low electricity consumption period, reducing the electricity cost of the secondary water supply system, and improving the utilization rate of electricity. At the same time, the problem of water outages caused by power outages is overcome. In the event of a sudden power outage, the lithium battery is used to supply power to ensure the normal operation of the water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a principle block diagram of a civil secondary water supply energy-saving system of the utility model;

[0025] Figure 2 This is a principle block diagram of the water pump switching mechanism of the utility model;

[0026] Figure 3 This is a circuit diagram of the charger of the utility model;

[0027] Figure 4 This is a circuit schematic diagram of the discharge module of the utility model. DETAILED DESCRIPTION

[0028] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0029] like Figure 1 As shown, this embodiment provides a civil secondary water supply energy-saving system, which includes: a flow regulator 4, a pressurized water supply mechanism, a first water pump 1, a second water pump 2 and a water pump switching mechanism.

[0030] like Figure 1As shown, the input end of the flow regulator 4 of this embodiment is connected to the water in the main water supply system of the city, and the output end of the flow regulator 4 supplies water to the first water pump 1, the standby water pump 3 and the second water pump 2 respectively. The flow regulator 4 is an indispensable device for the secondary water supply system. Its function is to prevent the vacuum and pressure imbalance in the series pipe when the municipal tap water inlet flow rate is less than the user's water flow rate, resulting in abnormal water supply and even damage to related equipment of the secondary water supply system. The input end of the flow regulator 4 is provided with a filter 5, and the filter 5 is a Y-type filter 5. The filter 5 is used to remove impurities in the medium to protect the normal use of the stop valve, the pressure reducing valve, the pump and various equipment. When there are more impurities in the filter screen of the Y-type filter 5, the filter screen pressure cover can be opened and the filter screen can be taken out for cleaning. A negative pressure suppressor 6 is provided on the flow regulator 4, and the negative pressure suppressor 6 is used to suppress the generation of negative pressure in the water supply system and maintain the pressure balance of the tap water network. A drain valve 10 is provided at the bottom of the flow regulator 4 , and the drain valve 10 is used to discharge impurities deposited in the flow regulator 4 .

[0031] like Figure 1 As shown, the pressurized water supply mechanism of this embodiment includes a pressure tank 7 and a pressurized water supply pipeline 8, one end of the pressurized water supply pipeline 8 is connected to the pressure tank 7, the other end of the pressurized water supply pipeline 8 is connected to the user, the other end of the pressurized water supply pipeline 8 is provided with a water outlet butterfly valve 9, the first water pump 1, the standby water pump 3 and the second water pump 2 all supply water to the pressure tank 7 through the pressurized water supply pipeline 8. Each water pump is connected to the check valve 12 through the flexible joint 11 in turn, the check valve 12 is connected to the butterfly valve 13 through the flexible joint 11, and the butterfly valve 13 is connected to the pressurized water supply pipeline 8 through the flexible joint 11.

[0032] When storing water for the pressure tank 7, close the water outlet butterfly valve 9, and supply water to the pressure tank 7 through the first water pump 1, the standby water pump 3 and the second water pump 2. After the pressure tank 7 is full of water, stop supplying water to the pressure tank 7, open the water outlet butterfly valve 9, and the pressure tank 7 supplies water to the user through the pressurized water supply pipe 8. A remote pressure gauge 14 is installed on the pressurized water supply pipe 8. The remote pressure gauge 14 is used to measure the pressure changes in the water supply network in real time and accurately, and plays a vital role in the stability, reliability and energy saving of the water supply network. When the pressure of the water supply network reaches the preset range, the system will automatically adjust the water pressure to ensure a constant water pressure in the water supply network. At the same time, it can also efficiently monitor the leakage of the network, timely discover and locate the leakage point, and improve the operation efficiency of the network.

[0033] like Figure 1 As shown, the first water pump 1 and the second water pump 2 of this embodiment are respectively used to input water from the city's main water supply system into the pressurized water supply mechanism.

[0034] When the electricity consumption time is in the valley period, the water pump switching mechanism controls the first water pump 1 to work and the second water pump 2 not to work. The first water pump 1 is powered by the AC 220V mains power output by the power supply network, and the first water pump 1 supplies water to the pressure tank 7, while charging the lithium battery pack in the water pump switching mechanism. When the electricity consumption time is in the peak period, the water pump switching mechanism disconnects the power supply network from the first water pump 1, the first water pump 1 does not work, the lithium battery pack in the water pump switching mechanism discharges, and supplies power to the second water pump 2, the second water pump 2 works, and the second water pump 2 supplies water to the pressure tank 7.

[0035] During off-peak hours, the first water pump 1 supplies water to the pressure tank 7, and during peak hours, the lithium battery pack supplies power to the second water pump 2, and the second water pump 2 supplies water to the pressure tank 7, thereby transferring the stored off-peak electricity to the peak hours of electricity consumption, reducing the electricity consumption burden during the peak hours of electricity consumption, improving the utilization efficiency of off-peak electricity, reducing abandoned electricity, reducing the electricity cost of the secondary water supply system, and overcoming the problem of water outages resulting from power outages.

[0036] like Figure 2 As shown, the water pump switching mechanism of this embodiment includes a power supply network, a lithium battery pack, a processor, a charger, a discharge module, a first relay, a second relay and a display screen.

[0037] The display screen is connected to the processor, and the display screen is a touch screen. The display screen is used to set the peak power time and valley power time of the country or city where the civil secondary water supply energy-saving system is located. Specifically, taking China's peak and valley power time as an example, 8:00-22:00, a total of 14 hours, is called the peak period, and the peak power price is 0.568 yuan / kWh; 22:00-8:00 the next day, a total of 10 hours, is called the valley period, and the valley power price is 0.288 yuan / kWh.

[0038] The lithium battery pack is used to store or release electrical energy. This embodiment uses a lithium battery. Compared with the existing lead-acid battery, the lithium battery is small in size and can reduce the size of the system. In addition, the lithium battery has a long cycle life, high energy density, fast charging speed, and high charging and discharging energy efficiency. The output voltage of the lithium battery pack of this embodiment adopts but is not limited to DC 72V, and the output voltage of the lithium battery pack can be customized according to the specifications of the second water pump 2.

[0039] The processor is the control center of the energy-saving system. It uses TI's 32-bit digital processing chip, model TMS320F2833x3, which is suitable for industrial control, motor control, etc. It has a wide range of uses. The digital processing chip used has a high-speed processing capability of 150MHz, a 32-bit floating-point processing unit, 6 DMA channels supporting ADC, McBSPt EMIF, and up to 18 PWM outputs, of which 6 are higher-precision PWM outputs, and a 12-bit 16-channel ADC. Thanks to its floating-point arithmetic unit, users can quickly write control algorithms and are compatible with fixed-point C28x controller software, thereby simplifying software development, shortening development cycles, and reducing development costs.

[0040] The input end of the charger is connected to the power supply network, the output end of the charger is connected to the lithium battery pack, the input end of the discharge module is connected to the lithium battery pack, the first output end of the discharge module is connected to the second water pump 2 through the first relay, and the second output end of the discharge module is connected to the processor. The power supply network is connected to the first water pump 1 through the second relay; the processor is connected to the signal control ends of the first relay and the second relay respectively, and the processor controls the on and off of the first relay and the second relay.

[0041] like Figure 3 As shown, the charger uses a rectifier bridge, a transformer, and a current-controlled pulse width modulation chip U1. The current-controlled pulse width modulation chip U1 uses the UC3842 chip of TI. The charger converts the 220V AC power of the power supply network into 85V DC power to charge the lithium battery pack. The processor is connected to the current-controlled pulse width modulation chip U1, and the current-controlled pulse width modulation chip U1 receives the charging instruction sent by the processor.

[0042] like Figure 4 As shown, the discharge module uses the battery protection chip U2 of China Resources Siwei Technology, model PT6302S, to provide discharge protection for the lithium battery pack to prevent over-discharge of the lithium battery pack.

[0043] When the power consumption time is peak or the power is temporarily cut off, the lithium battery pack is in a discharge state. At this time, the processor controls the disconnection of the second relay, the conduction of the first relay, and the shutdown of the charger, so that the first water pump 1 and the charger are disconnected from the external power supply network respectively. The processor controls the DC power stored in the lithium battery pack to be transmitted to the first relay. Since the first relay is in the on state, the DC power is used to power the second water pump 2, and the second water pump 2 operates normally, so as to avoid the use of high-priced electricity during the peak power consumption period, reduce the country's power consumption pressure during the peak power period, achieve the purpose of peak shaving, save user costs; and solve the problem of power outage and water outage in the secondary water supply. When the power is off, the lithium battery pack serves as a backup power supply to power the processor and the second water pump 2 to ensure the normal operation of the secondary water supply.

[0044] When the power consumption time is in the valley period, the lithium battery pack is in the charging state, and the processor controls the first relay to be disconnected and the second relay to be turned on. When the lithium battery pack is fully charged, the energy-saving system processes the silent state, and the processor controls the charger to be disconnected from the power supply network, and the charging of the lithium battery pack is terminated. At this time, the power supply network supplies power to the normal pressure water pump through the second relay. On the one hand, the power supply network outputs the power supply energy to the normal pressure water pump through the second relay; on the other hand, the power supply network charges the lithium battery pack through the charger to achieve the purpose of filling the valley.

[0045] like Figure 1 , 2 As shown, this embodiment is also equipped with a standby water pump 3, which is used to input water from the city's main water supply system to the pressurized water supply mechanism when the first water pump 1 fails, and is used as a backup for the first water pump 1. The standby water pump 3 is also powered by the AC 220V mains output by the power supply network. The power supply network is connected to the standby water pump 3 through a third relay, and the processor is connected to the signal control end of the third relay. The processor controls the on and off of the third relay, thereby controlling the start and stop of the standby water pump 3.

[0046] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A civil secondary water supply energy-saving system, characterized in that: It includes: A pressurized water supply mechanism, a first water pump (1), a second water pump (2) and a water pump switching mechanism; The pressurized water supply mechanism is used to pressurize the water in the city's main water supply system and then supply water to users; The first water pump (1) and the second water pump (2) are respectively used to input water from the city's main water supply system into the pressurized water supply mechanism; When the electricity usage time is at a peak period, the water pump switching mechanism controls the second water pump (2) to operate; when the electricity usage time is at a valley period, the water pump switching mechanism controls the first water pump (1) to operate; The water pump switching mechanism includes a power supply network, a lithium battery pack, a processor, a charger, a discharge module, a first relay and a second relay; The input end of the charger is connected to the power supply network, the output end of the charger is connected to the lithium battery pack, the input end of the discharge module is connected to the lithium battery pack, the first output end of the discharge module is connected to the second water pump (2) via a first relay, and the second output end of the discharge module is connected to the processor; The power supply network is connected to the first water pump (1) via a second relay; The processor is connected to a charger, and the charger receives a charging instruction sent by the processor; The processor is connected to the signal control ends of the first relay and the second relay respectively, and the processor controls the on and off of the first relay and the second relay.

2. The civil secondary water supply energy-saving system according to claim 1, characterized in that: It also includes a display screen, which is connected to the processor and is a touch screen. The display screen is used to set the peak power time and valley power time of the country or city where the civil secondary water supply energy-saving system is located.

3. The civil secondary water supply energy-saving system according to claim 1 is characterized in that: It also comprises a backup water pump (3), which is used to input water from the city's main water supply system into the pressurized water supply mechanism when the first water pump (1) fails.

4. The civil secondary water supply energy-saving system according to claim 3 is characterized in that: It also includes a third relay, the power supply network is connected to the standby water pump (3) via the third relay, the processor is connected to the signal control end of the third relay, and the processor controls the on and off of the third relay.

5. The civil secondary water supply energy-saving system according to claim 1 is characterized in that: It also comprises a flow regulator (4), the input end of which is connected to water in the city's main water supply system, and the output end of which is respectively used to supply water to the first water pump (1), the standby water pump (3) and the second water pump (2).

6. The civil secondary water supply energy-saving system according to claim 5, characterized in that: A filter (5) is provided at the input end of the current regulator (4), and the filter (5) is a Y-type filter (5).

7. The civil secondary water supply energy-saving system according to claim 5, characterized in that: The flow regulator (4) is provided with a negative pressure suppressor (6).

8. The civil secondary water supply energy-saving system according to claim 1 is characterized in that: The pressurized water supply mechanism comprises a pressure tank (7) and a pressurized water supply pipeline (8), one end of the pressurized water supply pipeline (8) is connected to the pressure tank (7), the other end of the pressurized water supply pipeline (8) is connected to a user, and the other end of the pressurized water supply pipeline (8) is provided with a water outlet butterfly valve (9).

9. The civil secondary water supply energy-saving system according to claim 8, characterized in that: The first water pump (1), the standby water pump (3) and the second water pump (2) all supply water to the pressure tank (7) via a pressurized water supply pipeline (8).

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