Principle of automatic water supply device

ZC-HY Constant Pressure Variable Frequency Water Supply Equipment

The host of ZC-HY constant pressure variable frequency water supply equipment adopts an imported variable frequency speed controller, which has protection functions such as undervoltage, overvoltage, phase loss, overcurrent, overload, short circuit, overheating, stall prevention, etc. It has been used without faults for more than 100000 hours. The power distribution control part of the equipment adopts intelligent control principles, which are easy to operate and practical, and the working status of the equipment is clear at a glance. The constant pressure variable frequency water supply equipment produced by Zhongcheng is an ideal water supply equipment system with complete protection functions, safe and reliable operation, and easy operation.

1. Stable pressure in the water supply network: The equipment is automatically closed-loop controlled by a microcomputer, which can restore the changing pressure to normal within 0.5 seconds, and the pressure adjustment accuracy is ± 5% of the set value.

2. Full water supply function and high safety factor: In case of local equipment failure, the emergency function can be activated to continue water supply. This device can automatically connect to the municipal water supply network and has dual constant pressure function, which can meet the normal pressure and flow of domestic and production water. It can automatically switch to high-pressure and high flow water supply in case of fire, and can be used for multiple purposes.

3. Energy saving and environmental protection: Directly connected to the tap water pipeline network, and can fully utilize the existing pressure of the municipal pipeline network, which can achieve the goal of reducing energy consumption. According to the survey data from the "Water Supply Equipment Promotion Center", energy savings can generally reach 50% to 90% or more. Recycling the water in the water tank can avoid water source pollution.

Overview

The ZC-HY constant pressure variable frequency water supply equipment consists of three parts: an air pressure tank, a water pump, and an electronic control system. Its outstanding advantages are that it does not require the construction of a water tower, has small investment, occupies less land, is flexible in layout, and can be quickly put into operation. Adopting automatic water and gas regulation, automatic operation, energy-saving and automatic grid connection with tap water, water supply can still be provided after power outage, and no supervision is required after debugging. Widely used for production, living, and office water supply in enterprises, residential areas, and rural areas. Suitable for places where the number of water supply households is over 1000, the daily water supply is over 1000m3, and the water supply height is within 200 meters.

working principle

The ZC-HY constant pressure variable frequency water supply equipment adopts pneumatic water supply. Using a sealed tank and utilizing the high-pressure gas water pressure inside the tank to achieve the purpose of water supply. The specific working sequence is that the water pump presses water into the tank through a check valve, compressing the gas inside the tank and gradually increasing the pressure. When the pressure reaches the specified upper limit, the electric contact pressure gauge automatically stops the pump through the control cabinet. The water pressure in the equipment is higher than the external pipe network pressure, and it automatically sends water to the water supply pipe network. When the water level inside the tank drops and the gas expansion pressure inside the tank decreases to the specified lower limit position, the electric contact pressure gauge restarts the water pump through the control cabinet. Repeat this process repeatedly, causing the equipment to continuously supply water. When the gas in the tank is insufficient, the gas replenishment valve can automatically replenish the gas.

working conditions

1. Transport medium: Cold and hot clean, non flammable and non explosive liquid that does not contain solid particles or fibers.

2. Liquid temperature: Room temperature type -15 ℃ to+70 ℃ Hot water type+70 ℃ to+120 ℃

3. Surrounding environment: no water droplets, steam, floating dust or metal particles. Places without sunlight exposure, high temperatures, and severe dust accumulation. Non corrosive, flammable gas and liquid environments. A place with no vibration and easy maintenance and inspection.

4. Environmental temperature:+45 ℃ and well ventilated.

Product Features

1. Save 23-55% electricity;

2. Reliable soft start alternating operation can be achieved for multiple pump units, greatly extending the service life of the equipment;

3. Specific automatic protection functions such as phase loss, undervoltage, overvoltage, overcurrent, overload, short circuit, overheating, stall, etc;

4. Save investment, reduce land occupation, facilitate installation, use, and maintenance;

5. Adopting digital PID regulation, with high constant pressure accuracy and small water pressure fluctuations;

6. It can meet the requirements of various working conditions such as constant pressure variables and variable pressure variables.

Scope of application

Can be applied to any situation where the incoming water pressure is insufficient, such as:

Newly constructed, expanded, and renovated residential buildings, residential communities, and office buildings. Hotels, restaurants, etc. Schools, military units, collective dormitories, and other places with high water usage. Several types of high flow water supply systems such as factories, booster pump stations, and development zones.

Device Mode

（1） Control mode of steady current compensator and vacuum suppressor

When the municipal water supply network is insufficient or the user's water consumption exceeds the supply capacity of the municipal water supply network, the vacuum suppressor opens and air enters the steady flow compensator, turning the originally closed compensator into a cut-off water tank to suppress negative pressure. In addition, liquid level control is set in the steady flow compensator. When it is lower than the low level, the water pump stops working.

（2） Self controlled current limiting mode

When the municipal water supply network is insufficient or the user's water consumption exceeds the supply capacity of the municipal water supply network, the feedback of pressure sensing signals is used to limit the frequency converter, so that the water pump does not take excessive water. When the municipal water supply network meets the requirements, the system returns to normal.

（3） Pressure control point method

When the municipal water supply network is insufficient or the user's water consumption exceeds the supply capacity of the municipal water supply network, a variable flow constant pressure water supply pump is directly started. After the water supply meets the requirements, the system returns to normal.

development

The building water supply boosting system adopted in China has roughly gone through four stages:

The first stage is to adopt the method of "water storage tank+water pump+high-level water tank". Municipal water enters the water storage tank, and then is pressurized by the water pump and sent to the high-level water tank. The high-level water tank supplies water to users, and the reservoir plays a regulating role during peak water use;

The second stage adopts the method of "water storage tank+water pump+pressure tank". Municipal water enters the water storage tank, and then is pressurized by the water pump and sent to the pressure tank. The pressure tank supplies water to users, and the reservoir plays a regulating role during peak water use;

In the third stage, the method of "water storage tank+constant pressure variable frequency water supply system" is adopted. After setting the water supply pressure of the system, under the control, the speed of the water pump and the number of water pumps put into operation change with the change of water supply volume, and the output pressure remains constant, which to some extent saves electricity consumption.

In the fourth stage of pipeline network pressure (no negative pressure) water supply era, equipment is directly connected to the municipal water supply network without the need to repair water storage tanks, fully utilizing the pressure of the municipal water supply network. The equipment has the characteristics of high efficiency, energy saving, environmental protection, no secondary pollution, high degree of automation, and easy maintenance, gradually becoming a rational water supply method for modern buildings.

The ZC-HY constant pressure variable frequency water supply equipment is a water supply device composed of a non negative pressure setting device and a constant pressure silent pipe pump. The constant pressure water supply equipment connects the system equipment in series with the insufficient pressure area of the municipal tap water pipeline network. The equipment detects the outlet pressure through sensors, compares the detected value with the set value, calculates the pressure that needs to be increased on the basis of the original pressure of the municipal tap water pipeline network, and determines the number of motor and pump units and the output frequency of the frequency converter to achieve constant pressure in accordance with the water use curve.

The ZC-HY constant pressure variable frequency water supply equipment utilizes the original pressure of the municipal water supply network, does not create negative pressure on the municipal water supply network, and can set the permitted suction pressure of the municipal water supply network. It is a new generation of energy-saving products in the water supply field.