Positioning device for a process plant

A positioning device configured to position a workpiece having a location hole, the positioning device comprising:

• a supporting member configured to support the workpiece;
• at least one positioning member mounted on the supporting member, each of the at least one positioning member comprising:
• a driving portion, and
• a locating pin coupled to the driving portion, the driving portion operable to drive the locating pin to be stretched into the location hole of the workpiece;
• and
• at least one pressing module mounted on the supporting member, each of the at least one pressing module comprising:
• a driving member, and
• a pressing member coupled to the driving member;
• wherein the driving member is used to drive the pressing member to press the workpiece after the locating pin is stretched into the location hole, and the driving portion is further configured to drive the locating pin move out of the location hole after the pressing member pressed the workpiece.