Pneumatic diaphragm pump operation Notes:
Pneumatic diaphragm pump is a compressed air-powered, through the diaphragm reciprocating deformation volume changes caused by the volume of the pump, the working principle is similar to the piston pump. The use of pneumatic diaphragm pump operation should pay attention to the following points:
1, to ensure that the maximum particles contained in the fluid does not exceed the maximum safety of the pump through the particle diameter standard.
2, the intake pressure should not exceed the maximum allowable pressure pump, compressed air above the rated pressure may result in personal injury and property damage and damage the performance of the pump.
3, to ensure that the pump pressure piping system can withstand the highest output pressure to ensure that the drive air system clean and normal working conditions.
4. Electrostatic sparks may cause personal injury and property damage due to explosion. Use wires with enough large cross-section to properly ground the grounding screws on the pump.
5, grounding requirements in line with local laws and regulations and site requirements of some special requirements.
6, fasten the pump and the connection pipe joints to prevent electrostatic sparks due to vibration impact. Use antistatic hose.
7, to periodically check and test the reliability of the grounding system, grounding resistance requirements of less than 100 ohms.
8, to maintain good exhaust and ventilation, away from flammable and heat sources.
9, the pump exhaust may contain solids, do not face the work area or exhaust port, so as to avoid personal injury.
10, when the diaphragm failure, the delivery of materials from the exhaust muffler squirting.
11, When transporting flammable and toxic fluids, please connect the outlet to a safe place away from the work area.
12, Please use at least 3/8 "inner diameter smooth pipe wall outlet and muffler.
13, high pressure fluid can cause serious personal injury and property damage, please do not pump the pressure and the pump and the pipe system for any maintenance work, such as to be repaired, the first cut off the pump intake, open The bypass pressure relief mechanism depresses the piping system and slowly loosens the connected pipe connections.
14, such as the delivery of harmful toxic fluid pump, please do not send the pump directly to the manufacturer to repair. According to local laws and regulations properly handle, and use Shanghai Wang Quan pump pure parts to ensure the service life.
15, liquid delivery part of the use of aluminum alloy pump, please do not use for the delivery of liquid containing Fe3 + and halogenated hydrocarbons and other halogenated hydrocarbon solvents, it will produce corrosion caused by burst pump.
16, to ensure that all contact with the transport body parts will not be transported corrosive fluid damage.
17, to ensure that all operators familiar with the operation and use of the pump to understand the safety precautions, if necessary, rationing the necessary protective equipment.
18, the correct use of the pump, do not allow long time air transport.
This article Keywords: pump
â‘ Single acting cylinder: only one end of the cylinder has a piston rod. Air is supplied from one side of the piston to generate air pressure. The air pressure pushes the piston to produce thrust to extend and return by spring or self weight.
â‘¡ Double acting cylinder: supply air alternately from both sides of piston, output force in one or two directions.
â‘¢ Rodless cylinder: general term for cylinders without piston rod. There are magnetic cylinder and cable cylinder.
The reciprocating cylinder is called swing cylinder. The inner cavity is divided into two parts by the blade, and the air is supplied to the two cavities alternately. The output shaft swings, and the swing angle is less than 280 °. In addition, there are rotary cylinder, gas-liquid damping cylinder and stepping cylinder.
Compared with the electric actuator, the cylinder can work reliably under harsh conditions, and the operation is simple, and the basic maintenance free can be realized. Cylinder is good at reciprocating linear motion, especially suitable for industrial automation in the most transmission requirements - workpiece linear handling. Moreover, only adjusting the one-way throttle valve installed on both sides of the cylinder can simply achieve stable speed control, which has become the biggest feature and advantage of the cylinder drive system. Therefore, for users without multi-point positioning requirements, most of them prefer to use cylinder from the perspective of convenience. At present, most of the applications of electric actuators in the industrial field require high-precision multi-point positioning, which is the result that it is difficult to achieve with the air cylinder.
The electric actuator is mainly used for rotating and swinging conditions. Its advantage lies in the fast response time and the precise control of speed, position and torque through the feedback system. But when it needs to complete the linear motion, it needs to be transformed by mechanical devices such as toothed belt or screw rod, so the structure is relatively complex, and there are high requirements for the working environment and the professional knowledge of the operation and maintenance personnel.
advantage
(1) The requirement for users is low. The principle and structure of the cylinder are simple, easy to install and maintain, and the requirements for users are not high. Electric cylinder is different, engineering personnel must have certain electrical knowledge, otherwise it is likely to be damaged due to misoperation.
(2) The output force is large. The output force of the cylinder is proportional to the square of the cylinder diameter; The output force of the electric cylinder is related to three factors: cylinder diameter, motor power and screw pitch. The larger the cylinder diameter and power, the smaller the screw pitch, the greater the output force. The theoretical output force of a cylinder with a diameter of 50 mm can reach 2000 n. for the electric cylinder with the same diameter, although the products of different companies are different, they are basically no more than 1000 n. Obviously, the cylinder has more advantages in terms of output force.
(3) Strong adaptability. The cylinder can work normally in high and low temperature environment, and has the ability of dustproof and waterproof, which can adapt to all kinds of harsh environment. Because of a large number of electrical components, the electric cylinder has high requirements for the environment and poor adaptability.
Air Cylinder, Pneumatic Cylinder, double acting cylinder, single acting cylinder, rodless cylinder
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