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2: Continuous type: When there is very little flow during the day, or if the normal leakage of the pipe network itself maintains a certain amount of flow, for example, the pressurized system of large hotels, restaurants, and industrial and mining enterprises.
3: Intermittent type: long time with low water trough and small flow rate or zero, for example: small office buildings, office buildings, commercial and residential buildings, various types of houses, and production water, etc. 4: At the same time, the water supply should also be considered for a certain period of time. Changes in internal flow, as well as changes in flow in different seasons, different areas of water use and other factors.
5: Fire-fighting water supply equipment and spray water supply equipment should generally be selected pneumatic type water supply equipment, because of its long-term maintenance pressure in the system, no flow changes, pneumatic water supply equipment can deal with the general leakage within the pipe, and increase a small flow The auxiliary pump usually does not need to start the main pump to save energy.
6: The choice of frequency conversion water supply equipment or pneumatic type water supply equipment for living water supply equipment can be achieved. Both have their own advantages.
7: Advantages of frequency conversion water supply equipment: It can supply water with constant pressure and the constant pressure value can be adjusted within a certain range. The accuracy of constant pressure is generally less than 0.02MPa. Frequency conversion speed regulation is a method of high efficiency and energy saving compared with common pressure water supply equipment. The average energy saving is 20%. In addition, the impact current of the frequency conversion start is small and the pump's helium shock is also small, and the noise is low at the time of low speed operation. Pneumatic water supply equipment advantages: relatively low cost, control system technology is simple, convenient service, easy maintenance. The frequency conversion water supply equipment device consists of a pressure tank, a water pump, an electric control cabinet, a pressure controller, a safety valve, a pressure gauge, a check valve, a gate valve, and a pipeline to form a complete automatic frequency conversion water supply device.
When the water pump starts up, it will fill the tank with replenishing air at the same time through the replenishing tank and the intake valve:
1: High-efficiency and energy-saving: Compared with the constant speed pump, the water supply saves electricity by 20-50%.
2: High degree of automation, complete functions, easy to use management:
3: With automatic inspection function: inspection interval can be arbitrarily set, frequency or industrial frequency inspection method optional. Do not remove the pump for a long time and cause the pump to rust or damage.
4: There is a water tank or pool with a low water level automatic stop function: the water level to the set low water level, automatic shutdown, in order to ensure the safety of equipment, restore the normal water level pump can automatically start and re-run.
5: Fault self-diagnosis function: It can automatically detect the inverter fault and judge the damage of the sensor cable.
6: The second pressure pre-setting function: dual constant pressure control, in the living or production fire sharing system, is very convenient to use, in the normal water supply, the pipe network system is the first set pressure. In firefighting, the fire pipe network system automatically puts in the second set pressure operation.
7: Safe and reliable operation, complete protection functions. Built-in phase loss, short-circuit, over-current, overload, over-voltage, under-voltage, overheating, stall and other protection functions, greatly improving the reliability of the equipment. Auxiliary pump pressure is maintained during the night to avoid noise caused by the main pump running at night, and it can reduce energy waste and noise.
The frequency conversion water supply equipment device consists of a pressure tank, a water pump, an electric control cabinet, a pressure controller, a safety valve, a pressure gauge, a check valve, a gate valve, and a pipeline to form a complete automatic frequency conversion water supply device.
When the water pump is started, the air is supplemented by the air and the air inlet valve at the same time. With the continuous increase of the water level, the volume of the gas in the tank is continuously condensed; the pressure is continuously increased, and when the pressure reaches the maximum pressure set by the society, it passes. The pressure sensing control pump is turned off. In the time when the water pump stops running, the compressed air has a swelling force and the water in the squeeze tank has a certain pressure and is continuously sent to the user.
With the outflow of water, the volume of water in the tank decreases, the volume of air increases, and the pressure in the tank gradually decreases. When the pressure in the tank falls to the minimum pressure determined by the society, the pressure sensor operates the water pump to start the pump. Stop the start until the desired water supply is achieved in the tube.
Life frequency conversion water supply equipment precautions:
1. The working environment of air pressure water supply equipment should be well ventilated, with a temperature of 1-50 degrees Celsius.
2. The power supply voltage is not lower than 350V and not higher than 410V.
3. Equipment that has been qualified for commissioning shall not be arbitrarily adjusted.
4. Under normal working conditions, the pump shall be inspected and maintained every six months to one year.
1: The basic basis for choosing a set of automatic life frequency conversion water supply equipment is the designed water supply flow and water supply pressure (head of water). In addition, the type of flow change of the application needs to be considered.