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A driving device and valve actuator based on gas-hydraulic combined spring

A technology of combining springs and driving devices, applied in the valve operation/release device, valve device, valve details, etc., can solve the problems of easy fatigue failure, troublesome installation, large volume, etc., to achieve reliable safety, convenient installation, reduce effect used

Active Publication Date: 2018-12-04
CHENGDU MAIKESEN FLUID CONTROL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a hydraulic valve actuator based on a gas-hydraulic combined spring, and to solve the problem of using a traditional spring cylinder in the existing valve actuator, which is heavy in mass, large in volume, takes up space, and is prone to fatigue Failure, troublesome installation, etc.

Method used

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  • A driving device and valve actuator based on gas-hydraulic combined spring
  • A driving device and valve actuator based on gas-hydraulic combined spring
  • A driving device and valve actuator based on gas-hydraulic combined spring

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Experimental program
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Effect test

Embodiment 1

[0042] Such as figure 2 As shown, a driving device based on a gas-hydraulic combined spring in the present invention includes a power cylinder 2, the power cylinder 2 adopts a hydraulic oil cylinder, and the power cylinder 2 is provided with a gas-hydraulic combined spring device 12, and the gas-hydraulic combined spring device 12 includes a pressure vessel Tank 13, the upper end of the pressure vessel tank 13 is provided with a gas input port 22, the upper and lower parts of the pressure vessel tank 13 are respectively a compressed gas chamber 15 and a hydraulic oil chamber 16, the compressed gas chamber 15 is filled with compressed gas, and the hydraulic oil chamber 16 Filled with hydraulic oil, the lower end of the pressure vessel tank 13 is provided with a hydraulic oil outlet 17 .

[0043] The power cylinder 2 includes a cylinder body 3, a piston 4, a cylinder seat 5 and a piston rod 6. The inner chamber of the cylinder body 3 at the front end of the piston 4 is the pist...

Embodiment 2

[0047] Such as image 3 As shown, the present invention is a driving device based on a gas-hydraulic combined spring. On the basis of Embodiment 1, the power cylinder 2 adopts an air cylinder, and the cylinder base 5 is provided with a hydraulic oil passage 19 communicating with the piston front cylinder 7. The hydraulic oil outlet 17 communicates with the piston front cylinder 7 through the oil pipe 18 and the hydraulic oil passage 19; when the air cylinder is inhaled, the piston 4 of the cylinder pushes the piston rod 6 to move forward, and at the same time, the gas-hydraulic combined spring device 12 is compressed , When the cylinder is deflated, the piston 4 pulls the piston rod 6 to retract under the joint action of the gas-liquid combination spring device 12 and the cylinder.

Embodiment 3

[0049] Such as Figure 4 As shown, a valve actuator of the present invention includes an actuator 1 and a hydraulic cylinder. The hydraulic cylinder includes a cylinder body 3, a piston 4, a cylinder seat 5 and a piston rod 6. The inner cavity of the cylinder body 3 at the front end of the piston 4 is the front cylinder of the piston. 7. The inner cavity of the cylinder body 3 at the rear end of the piston 4 is the piston rear cylinder 8, and the hydraulic cylinder is installed on the casing 10 of the actuator 1 through the cylinder base 5, and the piston rod 6 of the hydraulic cylinder is connected to the dial of the actuator 1. Fork 11 linkages. The hydraulic oil cylinder is provided with a gas-liquid combination spring device 12, and the gas-liquid combination spring device 12 includes a pressure vessel tank 13, and the upper end of the pressure vessel tank 13 is provided with a gas input port 22, through which gas can be injected into the pressure vessel tank 13. Input hi...

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Abstract

A drive device and valve actuator based on a gas-fluid composite spring. The drive device comprises a power cylinder (2). A gas-fluid composite spring device (12) is arranged on the power cylinder (2), and comprises a pressure vessel (13). A gas inlet (22) is provided at an upper end of the pressure vessel. An upper portion and lower portion within the pressure vessel (13) are respectively a compressed gas chamber (15) and a hydraulic fluid chamber (16). The compressed gas chamber (15) is filled with a compressed gas, and the hydraulic fluid chamber (16) is filled with a hydraulic fluid. A hydraulic fluid outlet (17) is provided at a lower end of the pressure vessel (13). The valve actuator comprises an actuator (1) and the power cylinder (2). The power cylinder (2) is arranged on the actuator (1), and is provided with the gas-fluid composite spring device (12). Compared to a metal spring or a metal spring cylinder employed in a conventional single-acting valve actuator, the gas-fluid composite spring device (12) of the present invention has numerous advantages in the structural design, manufacturing process, and installation and replacement thereof. In addition, the valve actuator of the present invention has significant improvement in application efficiency and reliability, saves energy, and is environmentally friendly.

Description

technical field [0001] The invention relates to the field of a valve actuator, in particular to a driving device and a valve actuator based on a gas-liquid combined spring. Background technique [0002] The actuator is a control actuator for opening and closing the valve. Its structure generally includes a power actuator, an actuator box, and a spring cylinder. It is generally used in emergency working conditions and pipeline application systems. , At the same time, when the control system loses power or air source, the single-acting actuator can automatically reset and drive the valve to the pre-designed fail-safe position, thereby minimizing the potential danger of the entire device. Single-acting actuators usually use the energy stored in compressed metal springs, UPS emergency power supply, or accumulator tanks, and other pre-stored energies such as weights to drive the actuator. Among them, the compressed metal spring is the most widely used actuator driving method. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K31/122F16K37/00
CPCF16K31/122F16K37/00
Inventor 王正权
Owner CHENGDU MAIKESEN FLUID CONTROL EQUIP
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