Khí nén thủy lực

Tìm hiểu về các ký hiệu trong mạch khí nén và y nghỉa chúng

2/2 Valve

2 Ports 2 Positions

3/2 Valve

3 Ports 2 Positions

4/2 Valve

4 Ports 2 Positions

4/3 Valve

4 Ports 3 Positions

5/2 Valve

5 Ports 2 Positions

5/3 Valve

5 Ports 3 Positions

Accumulator

Air Dryer

Air Motor

Flow One Direction

Air Motor

Flow Two Directions

Check Valve

Spring Closed

Compressor

Cylinder

Spring Return

Cylinder

Double Acting Double Rod

Cylinder

Double Acting

Single Fixed Cushion

Cylinder

Double Acting

Two Adjustable Cushions

Differential Pressure

Direction Of Flow

Exhaust Line / Control Line

Filters

and

Regulators

Filter

Automatic Drain

Filter

Manual Drain

Fixed Restriction

Flixible Hose Line

Flow Control Valve

Flow Gauge

Lever

Lines Connected

Lines Crossing

Lubricator

Muscular Control

One Bypass Flow Path

and Two Closed Ports

One Flow Path

Pedal or Treadle

Pilot Pressure

External

Pilot Pressure

Internal

Plugged Port

Plunger or Position Indicator

Pneumatic

Pressure

Actuated Switch

Pressure Gauge

Valve Pressure Regulator Adjustable Symbol Pressure Regulator Adjustable

Non Relieving

Pressure Regulator Adjustable

Self Relieving

Push Button

Quick

Connect

Coupling

Roller

Roller One Way

Shuttle Valve

Silencer

Solenoid and Pilot Manual Over Ride and Pilot

Solenoid Single Winding

Spring

Two Closed Ports

Two Distinct Positions

and One Transitory Centre Position

Two Flow Paths

and

One Closed Port

Two Flow Paths

with

Cross Connection

Vacuum

Pump

Variable restriction

Working Line

Valve Drawing Symbol

The following symbols are generally in accordance with BS1553-1 and BS5070

Different Line Types.

Line Types Symbol

Pipe Support Symbols

Pipe Supports Symbol

Symbols for fitting and representations.

Line Fittings Symbol

Symbols for Valves

Symbol

Symbols for Valve Actuators

Actuator Drawing

Symbols for Instruments

Valve Instrumentation

Symbols for Flow Instruments

Solenoid Valve Instruments

Instrument Indentifiers

Measured Variable	Type of Conditioner	Type of Component
F = Flow	R = Recorder	T = Transmitter
L = Level	I = Indicator	M = Modifier
P = Pressure	C = Controller	E = Element
Q = Quantity	A = Alarm
T = Temperature		Connexion Solenoid Valve symbols from the UK's premier solenoid valve suppliers Symbols for Process Equipment

The levels of detail for process equipment relates to the schematic type produced. A process flow sheet will only show basic levels of technical information sufficient to highlight essential process flow paths. An engineering line diagram of P and ID will show a lot more detailed comprehensive information and technical detail.

Equipment Process Plant -1

Stainless Steel Valve Symbol

Equipment Process Plant - 2

Water WRAS Drawing

Equipment Process Plant - 3

Brass Solenoid Drawing

Line tags and equipment identification.

Solenoid Symbol

Reading Pneumatic Schematic Symbols

Valve Symbol 5/2 Valve has 5 ports and 2 possible conditions 1.) B is pressurized and A is exhausted.2.) A is pressurized and B is exhausted. When the solenoid is NOT energized the B port is pressurized. The spring symbol defines the valve position at rest.The Block Solenoid Drawing The block symbolizes the possible valve functions or positions. Example: A 5/2 valve schematic will be illustrated with 2 blocks describing two valve functions or positions/ A 5/3 valve schematic will show three blocks describing 3 possible valve functions.The Actuator. Valve Drawing Symbol (Solenoid) SymbolPneumatic valves can be operated in several ways. Hand operated (including levers and push and or push pull buttons) : Air piloted (operated remotely by pneumatic signals) : Solenoid (directly actuated with electronic signals)Exhaust Port SymbolThe inverted triangle symbol Denotes an exhaust port. The letters EA indicate this is the exhaust port for the A circuit. Ebin turn indicated the exhaust port for the B circuit.The Arrows SV Symbol The arrow symbols illustrate the direction of gasses flowing into and out of the valve ports. Gas pressure is supplied from port P. Depending on which of the valve blocks is in function, the gas is directed to port A or B as shown by the arrows.The return spring Solenoid Drawing The spring symbol defines the “at Rest” position of the solenoid valve. The spring “pushes” from the side it is drawn on and places the right side block diagram of the valve in function.The T SymbolThis symbol indicates that a port is closed and is neither passing or exhausting gas. Solenoid Drawing Pressure of air supply symbolThis symbol indicates the air supply port, in addition to this the letter P or the number 1 also indicated the air supply port.