Air compressor, that is, air compressor, is a special equipment if it can meet the requirements. In the catalogue of special equipment, it is defined as follows: pressure vessel refers to closed equipment containing gas or liquid and bearing certain pressure.
Its scope is defined as gas with the highest working pressure greater than or equal to 0. 1MPa (gauge pressure), liquefied gas and liquid with the highest working temperature greater than or equal to the standard boiling point, fixed container and mobile container with the volume greater than or equal to 30L and the inner diameter (the largest geometric dimension of the inner boundary of the non-circular section refers to the section) greater than or equal to150 mm. ..
Extended data:
Composition structure of air compressor:
1, oil circulation system?
Before starting, start the oil pump control system. After the oil pump control system is started, the lubrication parts of the air compressor are guaranteed to be well lubricated. At the same time, the oil pump control system can adjust the internal oil pressure and oil temperature through the built-in temperature control valve to meet the needs of the system.
2. gas circulation system
When the compressor is working, air is sucked through the self-cleaning air filter, and the filter is automatically cleaned by PLC. After the air is automatically adjusted by the inlet guide vanes, it enters the primary compression, and the temperature of the gas after the primary compression is relatively high, then it enters the intercooler for cooling (the water flow rate of the intercooler is 1 10m/h), and then it enters the secondary compression system.
In order to prevent the gas in the system from flowing into the compression chamber (to avoid starting with pressure), a suspended full-open check valve is installed in the exhaust pipe of the compressor. The gas discharged from the compressor pushes open the one-way valve and enters the exhaust muffler, then enters the primary aftercooler, the secondary aftercooler, and then enters the main exhaust pipe.
3. Waterway circulation system
The cooling water enters the intercooler of the air compressor through the pipeline to cool the gas discharged from the primary compression, and then enters the aftercooler to cool the waste gas. The other cooling water inlet pipe cools the motor winding through two sets of heat exchangers at the upper part of the main motor, and the other cooling oil cooler.
4. Power distribution system
The air compressor is a 2000kW high-voltage motor (10kV) with full pressure start. The control cabinet is an indoor AC, metal armored drawable switchgear, which consists of a fixed cabinet and a drawable part, namely a handcart, to achieve the purpose of control, protection and monitoring, and has the function of "five precautions".
5. Screen protection system
There are two kinds of central signal devices: accident signal and alarm signal. The main task of accident signal is to send out sound signal in time when the circuit breaker trips unexpectedly, and make the corresponding circuit breaker lamp position signal flash. The main task of the early warning signal is to send out the sound signal immediately or with delay when the running equipment is abnormal, and make the optical signboard display the contents of the abnormal phenomenon.
6.DC power supply system
PZ32 series automatic maintenance-free lead-acid battery DC power supply equipment consists of charging device screen, DC feed screen and battery, which has the functions of automatic current stabilization, automatic voltage stabilization and automatic voltage regulation, and supplies power for central signal screen and high-voltage control system.
7.DTC control system
DTC control panel is the "brain" of air compressor. The values of various field sensors are finally summarized into DTC control panel, which displays various operating parameters and monitors the operating state of each part of the air compressor. When some parameters exceed the allowable range, DTC will give corresponding alarm or automatically stop the air compressor.
Reference source: Baidu Encyclopedia-Catalogue of Special Equipment