| CPC F16K 31/1225 (2013.01) | 17 Claims |
|
1. A two-way driving device for use with a valve component, comprising:
a body having a vertical channel extending upward and downward, at least one transverse piston cavity extending forward and backward, at least one auxiliary piston cavity extending upward and downward, and a sub-channel extending forward and backward, the vertical channel being defined by a vertical channel wall, the at least one transverse piston cavity having therein a transverse piston movable between a forwarding position and a backing position, the sub-channel having therein a sub seal ring and being in communication with the at least one transverse piston cavity, the transverse piston having a sub-piston protruding into the sub-channel via a rear end thereof and slidingly penetrating the sub-channel because of the sub seal ring fitted around the sub-piston, and the vertical channel wall having a lower seal ring;
a pneumatic sleeve having therein an oblong hollow core, having at least one auxiliary piston protruding upward into the at least one auxiliary piston cavity, disposed in the vertical channel, and being movable between a highest position and a lowest position, with the lower seal ring slidingly fitted around the pneumatic sleeve, with a gap formed between the pneumatic sleeve and the vertical channel wall to admit a gas, with a middle seal ring disposed annularly at the pneumatic sleeve, pressing against the vertical channel wall, and being higher than the lower seal ring;
an axle disposed partially in the pneumatic sleeve and movable forward and backward to ascend or descend together with the pneumatic sleeve, wherein the axle has an exposed segment exposed from the pneumatic sleeve and the body from above;
a transverse movement block fixedly disposed at the transverse piston in the at least one transverse piston cavity and thus movable forward and backward together with the transverse piston in the body, with the axle being capable of movably penetrating upward and downward the transverse movement block and thus moving forward and backward together with the transverse movement block;
a first gas duct disposed at the body, having an end defined as an outer end in communication with an outside of the body, having another end defined as an inner end in communication with the vertical channel, wherein the inner end of the first gas duct is lower than the middle seal ring when the pneumatic sleeve is at the lowest position;
a second gas duct disposed at the body, having an end defined as a lower end in communication with the vertical channel, having another end defined as an upper end in communication with a space between the body and a rear of the transverse piston in the at least one transverse piston cavity, wherein the lower end of the second gas duct is lower than the lower seal ring;
a third gas duct disposed at the body, having an end defined as a front end in communication with a space between the body and a front of the transverse piston in the at least one transverse piston cavity, and having another end defined as an outer end in communication with the outside of the body;
a fourth gas duct disposed at the body, having an end defined as an upper end in communication with a front end of the sub-channel, having another end defined as a lower end in communication with the at least one auxiliary piston cavity, wherein the lower end of the fourth gas duct is higher than the at least one auxiliary piston when the pneumatic sleeve is at the highest position; and
a pressure relief valve disposed at the body and being in communication with the outside of the body and the second gas duct,
wherein the pneumatic sleeve has a trigger slot concavely formed and spatially in communication with the gap above the lower seal ring and a space below the lower seal ring so as to be in communication with the lower end of the second gas duct when the pneumatic sleeve is at the highest position,
wherein the sub-piston has a sub trigger slot concavely formed and spatially in communication with the at least one transverse piston cavity behind the sub seal ring and the upper end of the fourth gas duct when the transverse piston in the at least one transverse piston cavity is at the backing position.
|