Piston-type oil tank with safety valve and a riveting tool
A piston-type oil tank with safety valve have a tank body, a separator piston arranged inside the tank body, and an oil inlet and an air outlet provided at the front and rear ends of the separator piston respectively. The separator piston is arranged with a penetrated safety valve core, a support frame is arranged at the end of the safety valve core facing the air outlet, and a stop plate is provided at the end of the safety valve core facing the oil inlet. An oil discharge groove is provided on the side wall of the safety valve core. When the support frame presses against the end face where the air outlet is located, the oil discharge groove connects the spaces on both sides of the separator piston, and an oil outlet gap is reserved between the support frame and the end face where the air outlet is located.
1 . A piston-type oil tank with safety valve, comprising:
a tank body ( 1 ) housing a separator piston ( 2 ), and
a first end plate provided with an oil inlet ( 3 ) and a second end plate provided an air outlet ( 4 ), the first end plate and the second end plate being disposed at a front end and a rear end of the tank body ( 1 ), respectively,
wherein a safety valve core ( 5 ) extends through the separator piston ( 2 ) in a direction parallel to an axial direction of the tank body ( 1 ),
wherein the safety valve core ( 5 ) comprises a support frame ( 6 ) disposed at a first end proximate to the air outlet ( 4 ) and a stop plate ( 7 ) disposed at a second end proximate to the oil inlet ( 3 ),
wherein a length of the safety valve core ( 5 ) exceeds that of the separator piston ( 2 ), and a sidewall of the safety valve core ( 5 ) is provided with an oil discharge groove ( 23 ), and
wherein, when the support frame ( 6 ) presses against the first end plate, the oil discharge groove ( 23 ) connects spaces in the tank body on both sides of the separator piston ( 2 ), and an oil outlet gap ( 8 ) is located between the support frame ( 6 ) and the first end plate.
2 . The piston-type oil tank with safety valve according to claim 1 , wherein a return spring ( 24 ) is sleeved on the safety valve core ( 5 ) between the support frame ( 6 ) and the separator piston ( 2 ).
3 . The piston-type oil tank with safety valve according to claim 2 , wherein the safety valve core ( 5 ) is provided with a sealing ring ( 13 ) on the section between the stop plate ( 7 ) and the oil discharge groove ( 23 ),
when the separator piston ( 2 ) moves toward the support frame ( 6 ), the sealing ring ( 13 ) moves out of the separator piston ( 2 ), the end of the separator piston ( 2 ) facing the first end plate is provided with a diameter-expanding hole ( 9 ) at a gap between the safety valve core ( 5 ) and the separator piston ( 2 ), and an inner diameter of the diameter-expanding hole ( 9 ) gradually decreases from the stop plate ( 7 ) toward the support frame ( 6 ).
4 . The piston-type oil tank with safety valve according to claim 3 , wherein the second end plate of the tank body ( 1 ) is a rear cap plate ( 10 ), and the air outlet ( 4 ) is arranged on the rear cap plate ( 10 ), the side of the rear cap plate ( 10 ) facing the separator piston ( 2 ) is provided with a positioning ring ( 11 ) matching the inner wall of the tank body ( 1 ), the side of the separator piston ( 2 ) facing the rear cap plate ( 10 ) is provided with a rear support ring ( 12 ) resting on the positioning ring ( 11 ), and an inner diameter of the rear support ring ( 12 ) exceeds an outer diameter of the support frame ( 6 ).
5 . The piston-type oil tank with safety valve according to claim 4 , wherein the first end plate of the tank body ( 1 ) is a front cap plate ( 14 ), and the oil inlet ( 3 ) is arranged on the front cap plate ( 14 ), a side of the front cap plate ( 14 ) is provided with a mounting base ( 15 ) for installing the tank body ( 1 ) on a riveting tool, the oil inlet ( 3 ) extends outward from the mounting base ( 15 ) into the tank body ( 1 ), and the front cap plate ( 14 ) is provided with an oil replenishing inlet ( 21 ) connected with the tank body ( 1 ), and an oil replenishing plug ( 22 ) is disposed in the oil replenishing inlet ( 21 ).
6 . The piston-type oil tank with safety valve according to claim 5 , wherein a sealing tube base ( 16 ) is arranged between the tank body ( 1 ) and the front cap plate ( 14 ), and a tightening rod ( 17 ) connects the front cap plate ( 14 ) and the rear cap plate ( 10 ).
7 . The piston-type oil tank with safety valve according to claim 6 , wherein the side of the sealing tube base ( 16 ) facing the separator piston ( 2 ) is contains a sleeve ring ( 18 ) matching the inner wall of the tank body ( 1 ), the end face of the separator piston ( 2 ) facing the front cap plate ( 14 ) is provided with a front support ring ( 19 ) resting on the sleeve ring ( 18 ).
8 . The piston-type oil tank with safety valve according to claim 6 , wherein a magnet ( 25 ) is provided on the side of the safety valve core ( 5 ) facing the front cap plate ( 14 ), and a sensor ( 26 ) for detecting the position of the magnet ( 25 ) is provided on the front cap plate ( 14 ).
9 . A riveting tool, comprising the piston-type oil tank with safety valve according to claim 1 , and a pump body ( 20 ), wherein the tank body ( 1 ) is in fluid connection with the pump body ( 20 ), the tank body ( 1 ) comprises a front cap plate ( 14 ), an oil inlet ( 3 ) is arranged on the front cap plate ( 14 ), and a mounting base ( 15 ) is provided on the front cap plate ( 14 ), and the mounting base ( 15 ) is connected to the pump body ( 20 ).