Pile driver with air pressure buffer

Abstract

A pile driver with an air pressure buffer comprises a pile following moving part, a rebound part, and an air pressure buffer. The pile following moving part comprises a pile cap ( 2 ) contacting the pile ( 1 ) and a piston lever ( 7 ), and the rebound part is the other part except the moving part. An air pressure buffer provided between the moving part and the rebound part is composed of a buffer piston ( 3 ), a buffer cylinder ( 4 ) and a vessel ( 5 ). The buffer cylinder ( 4 ) and the vessel ( 5 ) are intercommunicated with each other. Compressed gas ( 8 ) is filled in the vessel ( 5 ). The buffer piston ( 3 ) can slide in the buffer cylinder ( 4 ). The pile driver can save energy and accelerate the frequency of driving pile.

1 . A liquid propellant pile driver, wherein it comprises
 an air pressure buffer or a compressed gas spring which is located in the lower part of the pile driver;   the air pressure buffer or the compressed gas spring is configurated between the rebound part and the parts moving with the pile;   the parts moving with the pile said above include the pile cap that is contacted with the pile and the piston lever that is contacted with the pile without relative motion to the pile;   the rebound part said above includes all the components of the pile driver capable of moving up and down during piling but excludes the parts moving with the pile;   the air pressure buffer or the compressed gas spring said above includes the buffer piston, the buffer cylinder and the vessel; The buffer cylinder is connected to vessel; the vessel said above is filled with compressed gas or has a gasbag that contains compressed gases; the buffer piston can slide in the buffer cylinder.   
     
     
         2 . The pile driver described according to  claim 1 , wherein it further comprises an anti-collision opening cylinder which is configurated in the low part of the buffer piston of said the air pressure buffer or compressed gas spring