| 摘要 |
A driving and adjusting device of a passive shuttle-type shut-off valve is provided. The problems of a big valve body structure size, a non-random angle installment, a single drive mode, low stability and reliability, a high temperature and poisonous material entering into the driving and adjusting device and unadjustable on-off speed and low volume in the prior device are solved. A main body (33) is connected with an upstream pipe (1) and a downstream pipe (3). A pressure port (2) on the upstream pipe (1) is connected with the driving device. A double acting cylinder (34) is provided in a valve sleeve (21). The left and right chambers of the double acting cylinder are connected with the valve clack (24). The driving device is composed of a regulating valve, a directional valve, a check valve, a boost-insulation valve and an accumulator (18). It can select the drive mode and adjust the on-off speed and the flow volume of the valve. |
| 主权项 |
1. A driving and adjusting device of a passive shuttle-type shut-off valve comprising a valve body in which a left end of the valve body is connected with an upstream pipe, and a right end of the valve body is connected with a downstream pipe; in an inner chamber, a valve sleeve and a coaxial valve shaft are in axial sliding engagement with each other; the left end of the valve shaft is connected with a valve flap and the right end thereof is connected with a piston, the piston is in a double acting cylinder within the valve sleeve; a double acting cylinder cap is provided at the right end of the valve sleeve, and flow channels are disposed around the valve sleeve; a left side of the valve flap is in sealing engagement with a valve seat, and between a right side of the valve flap and the double acting cylinder there is disposed a spring; a left chamber of the double acting cylinder is connected with the first and second three-position four-way valves via a first line or a first shuttle-type boosting insulation valve connected in parallel with the first line, a first bi-directional adjusting valve, and a second line; a right chamber of the double acting cylinder is connected with ends of the first and second three-position four-way valves via a third line or a second shuttle-type boosting insulation valve connected in parallel with the third line, a second bi-directional adjusting valve and a fourth line; the first and second three-position four-way valves are connected with a three-way diverter adjusting valve via a fifth line; the first and second three-position four-way valves are connected to a return tank via a sixth line; the three-way diverter adjusting valve is connected with an energy accumulator via a seventh line and a first check valve; the three-way diverter adjusting valve is connected with a pressure port of the upstream pipe via a second check valve, an eighth line or a third shuttle-type boosting insulation valve connected in parallel therewith; the energy accumulator is connected with the return tank via a ninth line, a third check valve, a pump, and a tenth line; the energy accumulator is connected with a pressure relief groove via a pressure relief valve and an eleventh line.
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