Conveying pipeline valve actuator with conveying pipeline internal pressure as power

Abstract

The invention discloses a conveying pipeline valve actuator with conveying pipeline internal pressure as power. The conveying pipeline valve actuator comprises a cylinder body and a cylinder cover covering the cylinder body. The cylinder body is internally provided with a main piston, an auxiliary piston, a main storage chamber and an auxiliary storage chamber. A main shaft is connected into the main piston in a screwing mode. The cylinder cover is internally provided with a main spring and an auxiliary spring. The auxiliary spring is provided with a piston hole, and connected to a piston rod at the upper end of the main piston through the piston hole in a sleeved mode. The lower end of the main spring abuts against the piston rod of the main piston, and the lower end of the auxiliary spring abuts against the auxiliary piston. The main storage chamber is defined by the upper portion of the main piston, the lower portion of the auxiliary piston and the inner wall of the cylinder body. The auxiliary storage chamber is defined by the lower portion of the main piston, the inner wall of the cylinder body and the inner bottom of the cylinder body. A connecting pipeline and a fireproofing pipeline are arranged between the main storage chamber and the auxiliary storage chamber. The connecting pipeline is provided with a first fluid control valve, and the fireproofing pipeline is provided with a fireproofing induction valve. One side, inside the auxiliary storage chamber, of the cylinder body is provided with an inlet pipeline, and the inlet pipeline is provided with a second fluid control valve. The conveying pipeline valve actuator has the advantages of being long in service life, convenient to install and high in economical benefit, and has a good fireproofing effect.

Description

technical field [0001] The invention belongs to the field of valves, in particular to a delivery pipeline valve actuator using the pressure inside the delivery pipeline as power. Background technique [0002] The power sources used by the actuators used for the opening and closing of valves on the existing pipelines are mostly electric, or air pressure and hydraulic pressure, and most of them are supplied by the outside. When air pressure is used to open and close, not only does it need an air source from the outside, but also when the air source is discharged, the gas is directly discharged into the air near the actuator, polluting the environment. It is more troublesome when hydraulic opening and closing is adopted. It not only needs to be supplied with a hydraulic source from the outside, but also needs to be given a return oil pipe, otherwise it will not be able to discharge. When electric opening and closing is adopted, it is easy to cause fire due to other failure...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems caused by the power source for the existing valve opening and closing actuators

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