Can type non negative pressure

Product release date: January 28, 2015 23:34:00 Click:

The non negative pressure water supply equipment of the building water supply boosting system 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 non negative pressure water supply system" is adopted. After setting the water supply pressure of the system, under the control of the system, 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.Non negative pressure water supply equipment
The non negative pressure water supply equipment we usually refer to is a non negative pressure variable frequency water supply equipment, also known as a variable frequency non negative pressure water supply equipment. The traditional water supply method cannot do without a reservoir. The water in the reservoir is usually supplied by a tap water pipe, so the pressurized water enters the reservoir and becomes zero, causing a large amount of energy to be wasted.
With the development of secondary water supply pressurization technology, non negative pressure water supply equipment fundamentally solves these problems. According to the "Water Supply Equipment Promotion Center", non negative pressure water supply equipment does not require the construction of water towers, has small investment and occupies less land. It adopts automatic water and gas regulation, automatic operation, energy saving, and automatic grid connection with tap water. It can still supply water after power outages and does not require supervision for several years after commissioning. Compared to building a water tower, it saves 70% of investment, and compared to building a high-level water tank, it saves 60% of investment, greatly reducing civil engineering investment.
Mainly used for production, living, and office water in residential areas and rural areas. There are 20-2000 water supply households. The daily water supply is between 20-50000m3, and the water supply height reaches 150 meters, which is a 50 story building. The non negative pressure water supply equipment is an innovative and developed non negative pressure pipeline boosting device by our factory. This device is fully enclosed and can be directly connected to the water supply network. It is maintained by active air supply equipment and flow regulators to prevent negative pressure in the water supply network, ensuring stable (no negative pressure), safe, and clean water supply to users, and avoiding the hassle of building concrete water storage tanks or water tanks. The non negative pressure water supply equipment fully utilizes the original pressure of the tap water pipeline network, completes pressure superposition on the basis of the original pressure, completes the difference as much as possible, supplements as much as possible, reduces the selection of secondary pressurization equipment, saves capital, and can also greatly save energy during the application process. It is currently the most advanced and latest method of secondary water supply. core technology
With the continuous development of high-level secondary water supply technology, there are many new technologies emerging in the current water supply industry. The following are the latest core water supply technologies.
One of the core technologies: fully automatic intelligent stacking and adjustment technology
The fully automatic intelligent stacking and mixing technology is one of the core technologies exclusive to non suction forced stacking water supply equipment. The system is composed of six modules: database storage module, data analysis module, data acquisition module, data communication module, boosting module, and mixing module. Its structure and function are completely different from the vacuum suppressors and negative pressure eliminators of natural stacking and non negative pressure equipment. The vacuum suppressors only stabilize the flow and pre pressure compensation of municipal pipeline tap water, and cannot truly borrow pipeline pressure for stacking, nor does it have pressure mixing function. The fully automatic intelligent boosting and mixing system not only has stable flow and pre pressure compensation processing functions, but also adopts unique process design to boost and mix pipeline water, which can... 100% borrowing pipeline pressure, The true triple pressurization and stacking effect inside the clay pot has been achieved, achieving the goal of energy conservation and consumption reduction. At the same time, it also has information processing capabilities. These data are collected and analyzed in real-time by the system operation and processing, and sent to the corresponding execution unit.
Core Technology 2: Fully Automatic Intelligent Undervoltage Adjustment Technology
The function of the fully automatic intelligent undervoltage regulation system is to achieve normal water supply for equipment through the regulation system (including pressure, water level feedback, flow, pressure adjustment, etc.) in the case of insufficient pressure in the tap water pipeline network, meeting the water demand at the most unfavorable point of pipeline pressure, completely different from natural stacked water supply equipment. When there is a shortage of water in the pipeline network and the pressure fluctuation in the pipeline network is slightly large, the natural stacked water supply equipment will frequently start and stop. Not only does it seriously affect users, but it also has functions such as under pressure prediction and under pressure and under water operation. The equipment operation status can be adjusted at any time according to the working conditions of the pipeline network, achieving stable water supply for the equipment under the condition of under pressure and under water in the pipeline network.
Core Technology Three: Fully Enclosed Pressure Stabilized Flow Compensation Technology
The fully enclosed pressurized steady flow compensation system is fundamentally different from the natural superposition pre pressure form or atmospheric equilibrium form. Natural stacking is achieved by eliminating negative pressure through contact with the atmosphere, and this system uses fully enclosed components that meet the requirements for drinking water. Drinking water does not come into contact with the atmosphere or any gas components, strictly ensuring the hygiene and safety of drinking water. At the same time, it is also a pressure bearing device to ensure that it always operates under pressure in any situation, fundamentally eliminating the possibility of negative pressure in the pipeline network.
Introduction to Principle 2
Equipment principle

Working principle diagram of non negative pressure water supply equipment
The inlet pipe of the non negative pressure water supply equipment is directly connected to the tap water network. Water is pressurized into the inlet pipe of the equipment under the driving force of the residual pressure in the tap water network. The booster pump of the equipment continues to pressurize on the basis of the residual pressure of the inlet water, and increases the water supply pressure to the pressure required by the user before supplying water to the outlet pipe network; When the user's water consumption exceeds the supply of the tap water network, the pressure of the inlet pipe network decreases. When the pressure at the inlet of the equipment drops to an absolute pressure less than 0 (or the set protection pressure of the pipe network), the negative pressure prevention and control device in the equipment automatically starts working, adjusting the operating status of the equipment until it stops and waits for standby, ensuring that the pressure of the inlet pipe network no longer decreases and does not have adverse effects on the tap water network; When the water supply capacity of the tap water network is restored and the pressure of the inlet network is above the protection pressure, the equipment will automatically start and resume normal water supply; When the remaining pressure in the water supply network meets the user's water supply requirements, the equipment automatically enters a sleep state and is supplied directly to the user by the water supply network. When the water supply is insufficient, the equipment automatically resumes operation; When the user does not use water or uses very little water, the equipment automatically enters a shutdown sleep state. The small flow stabilizing and pressure maintaining tank located on the outlet side of the equipment maintains the user's water usage and pipe network leakage. When the user's water stabilizing and pressure maintaining tank cannot maintain the required pressure of the water supply pipe network, the equipment automatically wakes up and resumes normal operation. During the operation of the equipment, the remaining pressure of the tap water pipeline network is fully utilized, which never causes adverse effects on the tap water pipeline network while maximizing the satisfaction of user needs, reducing water supply energy consumption, and achieving optimal operation of the water supply system.
Working principle
1、 Non negative pressure flow controller
The non negative pressure controller using patented technology constantly monitors and controls the pressure in the municipal pipeline network and compensation tank. When the tap water pressure is insufficient, the non negative pressure controller starts working to ensure that the water pressure in the municipal pipeline network is not affected. According to the No. 135 document of the water company, the municipal pressure cannot be lower than 2KG. The non negative pressure flow controller not only ensures the safety and stability of water use for users, but also ensures the stability of the pressure in the municipal pipeline network.
2、 Bidirectional compensation device
By adopting the patented technology of bidirectional compensation for energy storage and release regulation device, it can automatically compensate for the continuous water volume of the tap water pipeline network, and also play a stabilizing compensation role for the user pipeline network, ensuring that the device does not generate negative pressure for the tap water pipeline network. The low peak bidirectional compensator works by directing the high-pressure water at the outlet of the water pump to the low-pressure chamber to replenish water. After the low-pressure chamber is filled, it is closed, and then the high-pressure chamber is further replenished. As the liquid level gradually rises, the pressurized inert gas is squeezed back into the energy storage device, thus completing the process of replenishing water to the tank during the low peak period. When the water supply during peak period or the pressure drop of the municipal pipeline network is reduced, the bidirectional compensation device replenishes the water from the low-pressure chamber to the constant pressure chamber, and at the same time, the energy storage device releases energy to compress the high-pressure chamber water. Add water to the low-pressure chamber, Together with the municipal water from the constant pressure chamber, the process of replenishing water to users during peak hours is completed.
3、 Energy storage device
The energy storage device adopts patented technology and is equipped with an inert gas that does not float in water under pressure. When supplying water during peak periods, it releases energy to squeeze the high-pressure chamber water and replenish it to the low-pressure chamber. By fully utilizing the principle of energy conservation, it can replenish water to users during peak periods, ensuring that the water in the tank can be maximally compensated to the user's pipeline network, suppressing negative pressure, and ensuring that it does not affect the municipal pipeline network.
Energy saving principle
The non negative pressure water supply equipment adjusts the speed of the AC motor by changing the frequency of the power input to the motor. According to the fundamental laws of fluid mechanics, water pump equipment belongs to square torque loads, and its speed N is related to flow rate Q, pressure (head) H, and shaft power P as follows:
--Q1/Q2=N1/N2； （1）
--H1/H2=(N1/N2) 2; （2）
--P1/P2=(N1/N2) 3; （3）
-Q1, H1, P1- Flow rate, pressure (or head), and shaft power of the water pump at N1 speed;
--Q2, H2, P2- Flow rate, pressure (or head), and shaft power of water pumps under similar mining conditions at N2 speed.
-- Reduce the power supply frequency from 50Hz to 45Hz,
--Then P45/P50=(45/50) 3=0.729, i.e. P45=0.729 P50;
If the power supply frequency is reduced from 50Hz to 40Hz, then P40/P50=(40/50) 3=0.512, that is P40=0.512 P50.
Non negative pressure water supply equipment pumps are generally considered based on the maximum operating requirements of the water supply system during design. However, in practical use, the water system may not reach the maximum amount of water for a long time. Generally, valves are used to increase the resistance of the system to throttle, causing power loss to the motor. Using a frequency converter can make the system work smoothly and stably, adjust the water supply by changing the speed, and save energy by reducing the speed to recover investment.