The frequency conversion stabilized water supply equipment control system passes the measured pipe ...
After a hard study, research, independent innovation ...
For the development of non-negative pressure water supply equipment industry, it must meet ...
In the frequency conversion constant pressure water supply equipment industry, you can count ...
- High-level residential water supply equipment selection
- Automatic boost frequency conversion equipment to solve the old high-rise
- Residential high-level secondary water supply equipment
- Wuhan constant pressure variable frequency water supply equipment
- Increased demand for water supply
- Application of PLC in water supply system of living quarters
- Working principle and working environment of hotel water supply system
- Towerless water supply installation with PLC in high-rise building
Zhongying Non-negative Pressure Pipeline Integrated Pressurized Intelligent Water Supply Equipment Helps Hunan Construction
Introduction of pressure-integrated intelligent water supply equipment without negative pressure pipeline
After hard study, research, and independent innovation, Changsha Zhongying Water Supply Equipment Co., Ltd. developed and produced a new way of non-negative pressure pipeline pressure integrated intelligent water supply equipment system in 2010. Pipeline integrated intelligent water supply equipment. Its equipment uses a number of patented technical control equipment to work. Although it is also variable frequency to regulate water supply, his feedback system is very advanced and accurate. There are many explanations on the technical aspects, just to clarify how high-performance equipment can improve water supply efficiency under low energy consumption.
： Non-negative pressure pipeline pressure integrated intelligent water supply equipment valve raw materials :
Requires full bore welded ball valve. When adjusting performance is required, a ball valve with a special structure with a V-shaped opening should be selected. In petroleum, petrochemical, chemical, power, and urban construction, metal-to-metal sealed ball valves can be used for piping systems with operating temperatures above 200 degrees. Ball valves are also suitable for piping systems with light construction, low pressure cut-off (small pressure difference), and corrosive media. Ball valves can also be used in low temperature (cryogenic) installations and piping systems. In the oxygen piping system of the metallurgical industry, a ball valve that is strictly degreased is used. When main pipelines in oil and gas pipelines need to be buried underground
： Non-negative pressure pipeline integrated intelligent water supply equipment circulation :
In large and medium-sized control systems, the cyclic soft start commonly used in equipment control has serious defects. In the conversion of the pump from frequency conversion to power frequency, fatal electrical and mechanical shocks can occur, leading to hazardous circuits and pipe networks. The shock-free conversion technology developed by the company can achieve shock-free soft start and soft stop to avoid mechanical and electrical shock. This technology is very important in large and medium-sized equipment.
· Various circulating water systems
As the equipment is directly pressurized by the pipeline, the inside of the negative pressure eliminator adopts rubber lining treatment without rust. Bacteria and dust will not enter the water supply system; there is no water storage facility to avoid the breeding of algae and ensure that the water quality is not polluted.
It is also used to transform the original old pump room equipment. After the transformation, it can also achieve the purpose of energy saving and automatic constant pressure water supply.
： Technical parameters of integrated intelligent water supply equipment without negative pressure pipeline pressure :
Flow range: 6-300m3 / h Head range: 30-200m Working pressure: ≤2.0mpa
Principle of variable frequency control of integrated intelligent water supply equipment without negative pressure pipeline pressure
The use of variable frequency speed regulation to achieve constant pressure water supply, compared with the use of regulating valves to achieve constant pressure water supply, the energy saving effect is very significant (can be calculated according to specific circumstances). Its advantages are:
a, starting balance, starting current can be limited to the rated current, thereby avoiding the impact on the power grid during starting;
b. As the average speed of the pump is reduced, the service life of pumps and valves can be extended;
c. It can eliminate the water hammer effect during starting and stopping;
： Application method of frequency conversion of integrated intelligent water supply equipment without negative pressure pipeline pressure :
Usually, in the same water supply system, multiple commonly used pumps are set. When the water supply is large, many pumps are turned on. When the water supply is small, one or two pumps are turned on. One way is to use one inverter for all pumps, and the other is to use one inverter for each pump. The latter method is based on the pressure feedback signal. Automatically adjust the inverter output frequency through PID calculation. Change the motor speed. So as to achieve the purpose of constant pressure in the pipe network. A closed loop circuit is simpler, but the cost is high, and the former method is low in cost. Performance is not worse than the latter. But the control procedure is more complicated and is the future development direction. 变频恒压系统 就可实现一变频器控制任意数马达的主要功能。 The main function of an inverter to control any number of motors can be achieved by the Zhongying series inverter constant voltage system developed by my production enterprise . The principles described below are all systems where one inverter drives multiple motors.
： Advantages of non-negative pressure pipeline integrated intelligent water supply equipment :
1. Save manpower and material resources: There is no pollution in the use of water quality, and no equipment is required to install disinfection equipment, which further saves sponsorship. The use is very economical, because there is no pool (box), saving the cost of regular disinfection and cleaning.
2. Advanced control system: using high-quality inverter, can be installed with human-machine interface control according to customer requirements, accurately, clearly, real-time display of water pressure, water inlet pressure, set pressure, pump current, operating frequency and other operating parameters and operation Status, and can display dynamic pictures and real-time images. Fully automatic intelligent control and management, friendly man-machine dialogue, simple operation and reliable performance.
3. Province of Sponsorship: No need to build a cistern or water tank, and no need to set a large air pressure tank, which saves a lot of sponsorship. Moreover, since the primary water supply pressure of the water pipe network can be fully utilized, the selection of the booster pump can be reduced and equipment sponsorship reduced. .
4. Sanitation without secondary pollution: The water supply system is fully sealed from the water pipe network to the user's water tap, and pollutants will not enter the system; the water body does not directly contact the air, and the flow parts are made of food-grade stainless steel; no secondary pollution Opportunity, environmental hygiene.
5. Significant energy-saving effects: the equipment is directly connected to the water pipe network in series, and the required pressure is superimposed on the primary water supply pipe network pressure of the water plant. How much is the difference and how much can be used to make full use of the residual pressure of the pipe network; The equipment does not even need to run, and the energy saving effect is significant. Compared with the traditional integrated intelligent water supply equipment with no negative pressure, the energy saving is 30% -90%.
6. Non-negative pressure pipeline integrated pressurized intelligent water supply equipment adopts PID closed-loop adjustment, high constant pressure accuracy and small water pressure fluctuation.
7. Save investment, reduce land occupation, convenient installation, use, and maintenance: the construction of the pool (or water tank), the total project investment is large, and the use of regular cleaning during use, not only increase the total project investment, but also increase the daily maintenance costs. This equipment uses the adjusting device to supply water, which saves investment and reduces land occupation. Depending on the site conditions of the user, different vertical or horizontal installation methods can be used for convenient maintenance.
8. High degree of automation, reliable operation and convenient management.
9. It has various automatic protection functions such as overload, short circuit, over current, under water, over pressure, etc.
： Product features :
No need to build a pool, save energy and save money:
Economical and hygienic, energy-saving effect is remarkable, and practice has proved that it can save more than 50% of the cost of new pools and save 20% to 40% compared with other water supply equipment.
The integrated intelligent water supply equipment without negative pressure pipeline pressurization is easy to install and saves floor space:
It can be equipped with horizontal steady flow tank or vertical steady flow tank. The two types of ballast tanks have different product characteristics: the horizontal ballast tank occupies a small space: the vertical ballast tank occupies a small area, and the manufacture and testing of the ballast tank meet the requirements of GB150 "Steel Pressure Vessels". The inner wall uses advanced "841 epoxy polyamide food container inner wall coating", anticorrosive, and meets food hygiene standards.
： Product features :
1 Integrated professional design, compact structure, system direct equipment installation Direct equipment installation in the water tank has less sponsorship, convenient equipment installation and beautiful appearance.
2 Using the superposition of pipe network pressure and automatic frequency conversion operation mode, the energy saving effect is significantly improved (greater than 40%).
3 The supporting equipment is easy to install. There is only one municipal pipeline network inlet and one water supply outlet.
4 Stable operation, low vibration and low noise (noise value below 60dB)
5 The system water supply is stable (even if the pipe network is temporarily cut off, water can be supplied normally through the water tank), which fully guarantees the pressure at the end of the system.
6 The main function of automatic inspection can be added to reduce the cost of property management.
7 PLC programmable control is used for full-automatic operation, convenient operation and maintenance.
： Material of non-negative pressure pipeline integrated intelligent water supply equipment tank :
It is required that the material performance of the water tank is stable, non-corrosive, contains no harmful substances to the body, and is resistant to cleaning and easy to clean. There are currently three types of water tank materials commonly used: stainless steel, glass lined and glass steel. Stainless steel is sturdy and durable, resistant to corrosion, able to withstand outdoor conditions, and costly; glass-lined has high strength and good corrosion resistance, and is generally used in corrosive media; glass steel has poor strength, good corrosion resistance, but poor wear resistance. It is generally used for indoor small water tanks, and its cost is also low. The requirements of the water tank of our factory are relatively low. The medium is clean water, the volume is small, and the indoor use. Considering the cost, we choose FRP material.
Water tank layout:
In order to meet the requirements of use, the water tank should be equipped with one water inlet (DN80), two water outlets (DN50), one overflow hole (DN50), one sewage outlet (DN50), one manhole (500mm), glass 1 tube level gauge (DN15), 2 mounting holes (φ50mm) for float level gauge equipment. The positions of the openings are determined according to the site conditions, as shown in Figure 2 "Water Tank Nozzle Diagram".
Considering the space requirements of the sewage outlet under the water tank, as well as the level of the water tank and the ground carrying capacity, a concrete foundation needs to be laid for the water tank.
： Non-negative pressure pipeline integrated intelligent water supply equipment operating conditions :
When the main network pressure runs above the set protection pressure, the negative pressure suppression system uses intelligent control technology. According to the requirements of the pipe network, the equipment operating conditions are automatically controlled. When the main network pressure runs below the set protection pressure, the device Stop running. When the amount of incoming water is insufficient and the negative pressure suppression system fails, the negative pressure elimination system starts to work, which makes the internal flow regulator change from negative pressure to normal pressure, thereby avoiding the impact of the equipment on the municipal pipe network due to insufficient water .
It can be divided into automatic pressure according to different working methods, each with its own product characteristics. It is widely used in various fields such as life, fire constant pressure / voltage stabilization, production, spraying and so on.
Therefore, water plays a vital role in the hospital. The performance of the water supply system should not be underestimated. The pressure of the water supply affects all aspects of the operation of the hospital. Therefore, we must increase awareness of responsibilities, strengthen business training, understand every working link of the water supply system, do every job and emergency plan to ensure the stable operation of the water supply system is the top priority. It is essential that every staff responsible for the integrated intelligent water supply equipment for non-negative pressure pipeline pressurization recognizes its importance and the necessity to ensure the operation of integrated intelligent water supply equipment for non-negative pressure pipeline pressure.
: Advantages of non-negative pressure pipeline integrated intelligent water supply equipment :
1. Reliable operation: It has no effect on the water pipe network. The equipment uses an adjustment tank to automatically adjust without negative pressure. When the pipe network is pressurized to supply water, it will not generate negative pressure on the original pipe network and will not affect the normal water consumption of other users.
2. Sponsorship and savings: No need to build a cistern or water tank, saving civil sponsorship; no need to pressurize from zero, so the equipment selection is relatively small, equipment sponsorship is reduced; no secondary pollution of water quality, no purification equipment is needed, and sponsorship is saved. Can make full use of the pressure of the water pipe network, low energy consumption, saving daily electricity costs. No use of pools and water tanks, saving regular cleaning and consumption.
3. Flexible electrical configuration: The electrical control part can adopt either frequency conversion constant (variable) voltage control or pressure (ZBW constant pressure type) direct control.
What is pseudo negative pressure?
Non-negative pressure pipeline pressure integrated intelligent water supply equipment controlled by electric contact pressure gauge
The water inlet pressure is detected by the electrical contact pressure gauge without any negative pressure. The pump stops below a certain value and the pump starts above a certain value.
1.How can the pressure of tap water be superimposed?
2.How can the water in the original steady-flow compensation tank ensure differential compensation?
3.Is the electrical contact meter reliable?
4.Is it easy to cause the pump to start and stop frequently when the pressure fluctuation is large?
Composition of non-negative pressure pipeline pressure integrated intelligent water supply equipment
1. Working pump, commonly used single-stage or multi-stage horizontal or vertical fresh water centrifugal pump.
2, small pumps and small air pressure tanks: small flow rate or even zero flow rate lasts longer, set for more power saving.
3. Frequency conversion control cabinet: The frequency conversion control cabinet is the core part of the equipment and is generally supplied by the pump according to the power of the pump.
4. Attachments: Mainly include connecting pipes, as well as valves, check valves, pressure gauges, pressure relays and bases. Generally assembled equipment is supplied by assembly.
应用案例 ： Application case of integrated water supply equipment without negative pressure pipeline pressure :
Suitable for pressurized water supply in any area with insufficient tap water pressure.
Various circulating water systems.
Retrofit the original pressure-integrated intelligent water supply equipment for air pressure and negative pressure pipelines.
Production and living water of industrial and mining enterprises.
Large water supply intermediate booster pumping station for waterworks.
Domestic water in newly built residential quarters or office buildings.
The low-level tap water pressure cannot meet the required fire-fighting water.
Where pools are to be built, water supply methods shared by non-negative pressure equipment and pools can be used to further save energy.