The working principle and characteristic of pressure switch

The pressure switch is a simple pressure control device, when the measured pressure reaches the rated value, the pressure switch can issue an alarm or control signal. The general principle of the pressure switch is that when the pressure inside the system is higher or lower than the rated safety pressure, the sensor inner diaphragm moves instantaneously, pushing the switch connector through the connecting rod to turn on or off when the pressure drops to When the rated pressure is exceeded, the diaphragm is automatically reset, or the switch is automatically reset, or simply when the measured pressure exceeds the rated value, the free end of the elastic element is displaced, directly or after comparison, pushing the switching element, changing the switching element Of the state, to achieve the purpose of controlling the measured pressure. The pressure switch uses elastic elements such as single-ring spring tube, diaphragm, diaphragm and bellows. Switch components are magnetic switch, mercury switch, micro switch and so on.
The main categories of pressure switches include normally open and normally closed. The main features are:
1, the use of British pipe thread quick connector or brass welded installation structure, flexible installation, easy to use, no special installation and fixed.
2, plug-in wire-type connection for users to arbitrarily selected. 4, sealed stainless steel sensor safe and reliable.
5, the pressure range can be arbitrarily selected according to the user to create the pressure value.
Pressure switch main application areas: mainly for household, commercial, automotive refrigeration system of high and low pressure protection control, steam conditions and power stations; accumulators, receivers, flashing cans, separators, scrubbers, oil refining equipment
Set. It is also suitable for high and low pressure protection control of various equipment tools.
Usually have a pressure switch pump, are some high-pressure pump, such as to the high-rise water pump, in order to reach a certain pressure, the pump stop, to avoid no load but the pump has been in that turn, waste of electricity, The pressure does not let the pressure immediately lose, so it is not a large number of water pumps will not start when the water pipe or pump pressure is less than the switch pressure transfer point of the lower limit, the switch automatically connected to the pump began to run when the water pipe or pump When the pressure is greater than the upper limit of the switching pressure regulation, the switch is automatically disconnected and the pump stops running. The upper and lower limits of the switching pressure can be adjusted within the adjustment range depending on the height of the water and the pressure required for the pump.
Differential pressure switch in general is the use of two pipeline pressure to send a signal from the two membrane chamber cavity, two cavity were sealed by two pieces of film and a piece of differential pressure diaphragm seal. The high pressure and the low pressure enter the high pressure chamber and the low pressure chamber of the differential pressure switch respectively, and the sensed differential pressure causes the pressure sensitive diaphragm to be deformed, and finally the upper micro switch is started by the mechanical structure such as the railing spring to finally output the electric signal. Differential pressure switch pressure sensing element is divided into diaphragm and bellows.