Box type without negative pressure

Product release date: January 28, 2015 23:31:00 Click:

The box type non negative pressure water supply equipment is developed on the basis of a combined stainless steel water tank and variable frequency constant pressure water supply, and is equipped with control devices such as anti negative pressure, anti backflow, and anti water quality deterioration. Compared with ordinary variable frequency water supply equipment, this device has the advantages of significant energy saving, low noise, low occupancy, and high reliability, and is currently a relatively advanced water supply mode.

The box type non negative pressure water supply equipment can be connected in series with the municipal pipeline network to ensure that no negative pressure is generated in the municipal pipeline network. During peak water usage periods, the water in the closed water tank can be pressurized by computer-controlled variable frequency regulation of the water pump, avoiding the flow of water required by users due to insufficient supply from the municipal pipeline network.

The box type non negative pressure water supply equipment is the seventh generation product upgraded and developed on the basis of the original variable frequency constant pressure water supply equipment and non negative pressure water supply equipment. It consists of a stainless steel water tank, a dedicated water pump, an intelligent variable frequency control cabinet, a non negative pressure device, a boosting device, a water diversion device, and a stabilizing tank. It is a new type of electromechanical integrated water supply equipment that combines computer technology, variable frequency technology, and motor pumps. To meet the requirements of urban water supply network, which not only does not generate negative pressure during pumping, but also has a certain capacity for regulating and storing water, and continuously stops water supply during peak periods. Using a microcomputer controlled variable frequency pump to operate at a constant speed and utilizing the existing pressure of tap water can ensure that the pressure required by the user is constant. It has the advantages of energy saving, environmental protection, low noise, and constant water supply pressure.
The main technical indicators of the boost pressure range, flow rate, and energy-saving indicators are all higher than other reported products in China, and the structural design is innovative, with an overall level that is leading domestically and advanced internationally. Therefore, it has a great competitive advantage in the market. In summary, the main characteristics of intelligent box type non negative pressure water supply equipment are to protect pipeline pressure, regulate peak water use, save energy, be safe, environmentally friendly, provide high-quality water supply (solve secondary water supply pollution), and have low noise.
With the development of secondary water supply pressurization technology, box type non negative pressure water supply equipment fundamentally solves these problems. According to the "Water Supply Equipment Promotion Center", box type non negative pressure water supply equipment does not require the construction of a water tower, 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 a power outage 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.
Box type non negative pressure water supply equipment is widely used for production, living, and office water in enterprises, 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.

Working principle diagram
When the pressure of the public water supply network is ≤ 0.2Mpa (can be freely set to 0.2-0.4Mpa), the non negative pressure device will be turned off and the non negative pressure inlet device will be opened, and water will be supplied from the water tank. Conversely, when the pressure of the public water supply network is ≥ 0.2Mpa, a delay of 10 minutes (time adjustable) will be applied. The non negative pressure device will be turned on and the non negative pressure inlet device will be turned off, and water will be supplied from the public water supply network. The water stored in the non negative pressure water tank is intelligently controlled to circulate every 6 hours to ensure fresh and pure water quality.
The variable frequency pump of the box type non negative pressure water supply equipment operates at a certain speed, utilizing the original pressure of tap water to achieve superposition and ensure the pressure required by the user is constant. The inlet of the variable frequency pump for the non negative pressure water tank is connected to the non negative pressure device and the non negative pressure inlet device. By opening and stopping the non negative pressure device, the tap water pipe network does not generate negative pressure while the non negative pressure device starts and stops? The negative pressure inlet device will perform the opposite action as the negative pressure inlet device.
The non negative pressure device of the tap water network automatically shuts off when the water is stopped, and the non negative pressure inlet device of the water tank automatically opens to supply water from the water tank. When the liquid level in the water tank drops to a certain level, the non negative pressure inlet device will automatically shut down, the equipment will automatically stop, and it will automatically start running when power is restored.

1. Ensure pipeline pressure: Adjust peak water usage, and use intelligent solenoid valves at the inlet of the water tank to control inlet pressure and water level. When the pressure in the pipeline decreases and the booster pump draws water from the water tank, it can be intelligently controlled. When the water level in the tank is below a certain level, the solenoid valve is opened to release water from the pipeline, ensuring a certain pressure at the water intake. This measure can avoid peak water usage and have a peak shaving effect. Secondly, it avoids zero pressure discharge from ordinary water tanks and provides good protection for pipeline pressure.
2. Unique configuration: The equipment introduced by the "Water Supply Equipment Promotion Center" is at the forefront of leading the development of water supply equipment, using imported international advanced technology and key equipment, combined with dedicated pumps. It uses water-cooled motors, water-cooled bearings, fully enclosed absolute drip proof, with a noise level of less than 50 decibels, to prevent small water tank space and conventional motors from overheating and burning out motors and equipment.
3. Operational reliability: When there is a peak in water usage or when the tap water stops, water is supplied from the water tank, greatly improving the reliability of user water usage and fully complying with self supplied water supply standards.
4. Environmentally friendly and pollution-free: The water tank, water pump, pipelines, valves and other water related materials in this complete set of equipment are all made of food grade stainless steel materials, sealed for water supply, and will not produce secondary pollution, ensuring hygiene and environmental protection.
5. Energy saving: When the tap water pressure can meet the user's water requirements, the booster pump is controlled to be in a sleep state through frequency conversion. When non peak water usage occurs and the tap water pressure cannot reach the user's water pressure, the water pump can add pressure boosting on top of the tap water pressure (0.2-0.5MPa), making full use of the excess pressure to save electricity and achieve significant energy-saving effects.
5 Scope of application
1. Applicable geographical scope: Suitable for pressurized water supply in areas with sufficient pressure in urban pipeline networks
2. Applicable engineering types: production and domestic water for industrial and mining enterprises, large intermediate booster pump stations for water supply in water plants
3. Applicable engineering location: Secondary pressurization system for water supply
4. Other applicable scope: Domestic water supply for newly constructed, renovated, expanded residential buildings, office buildings, hotels, restaurants and other public buildings
5. Types of using units: design unit, construction unit, supervision unit
6 Differences
1. From the perspective of the implementation of water supply methods, non negative pressure water supply is mainly achieved by setting up a steady flow compensator and connecting it in series with municipal tap water, which can utilize the original 100% pressure of tap water. The pressurized steady flow compensator is a fully sealed pressure vessel, completely isolated from the outside world, and completely eliminates water pollution.
2. From the perspective of water supply stability, the pressure of non negative pressure water supply is stable, while the water pressure of the pool water supply fluctuates and cannot be stabilized.
3. From the perspective of later maintenance management, non negative pressure water supply can achieve fully automatic operation without the need for dedicated personnel management. The overall structure of the entire product is strong, saving time and effort.
4. From the perspective of equipment installation, the water supply method for the pool requires the construction of a pool or water tank, which requires a large amount of work, is time-consuming and labor-intensive, and has a relatively long construction period.