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Valve actuator based on gas-liquid combined spring

A technology of valve actuator and combined spring, which is applied in the direction of valve details, valve device, valve operation/release device, etc., can solve the problems of easy fatigue failure, troublesome installation, heavy quality, etc., and achieve safety, reliability, convenient installation, Safe to use

Active Publication Date: 2016-11-16
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 valve actuator based on a gas-hydraulic combined spring, and to solve the problem of using a traditional spring cylinder of the existing valve actuator, which is heavy in mass, large in volume, takes up space, and is prone to fatigue failure. Trouble with installation

Method used

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  • Valve actuator based on gas-liquid combined spring
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  • Valve actuator based on gas-liquid combined spring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 2As shown, a valve actuator based on a gas-hydraulic combined spring includes an actuator 1 and a power cylinder 2. The power cylinder 2 adopts a pneumatic cylinder, and the pneumatic cylinder is installed on the side of the actuator 1. The installation of the pneumatic cylinder and the actuator 1 The connection mode is the same as that of the prior art, and the structure of the actuator 1 also adopts the existing structure. The other side of the actuator 1 is provided with a gas-hydraulic combination spring cylinder 3, which includes a spring cylinder body 4 and a spring piston 5. And the spring piston rod 6, the spring piston rod 6 is arranged in the spring cylinder 4, the spring piston 5 is fixedly arranged on the spring piston rod 6, the spring cylinder 4 is provided with a gas-liquid combination spring device 7, and the gas-liquid combination spring device 7 Including a pressure vessel tank 8, the upper end of the pressure vessel tank 8 is provided ...

Embodiment 2

[0058] Such as image 3 As shown, a valve actuator based on a combined gas-hydraulic spring, based on Embodiment 1, a spring 13 is provided on the spring piston rod 6 at the rear end of the spring piston 5 . When the pneumatic cylinder takes in air, the piston 15 of the pneumatic cylinder pushes the piston rod 16 to move forward, and the piston rod 16 pushes the shift fork 17 to open the valve. At the same time, the gas-liquid combined spring device 7 and spring 13 are compressed. The piston 15 pulls the piston rod 16 to retract under the joint action of the gas-hydraulic combination spring device 7, the spring 13 and the pneumatic cylinder, and the piston rod 16 drives the shift fork 17 to reversely move to close the valve.

[0059] On the basis of the original spring cylinder, the front end of the spring in the spring cylinder is provided with a spring piston linked with the spring piston rod. "Device" can greatly reduce the installation size of the original spring cylinder...

Embodiment 3

[0061] Such as Figure 4 As shown, a valve actuator based on a gas-hydraulic combined spring. On the basis of Embodiment 1, the power cylinder 2 adopts a hydraulic cylinder. When the hydraulic cylinder enters oil, the piston 15 of the hydraulic cylinder pushes the piston rod 16 to move forward, and the piston The rod 16 pushes the shift fork 17 to open the valve. At the same time, the gas-hydraulic combination spring device 7 and the spring 13 are compressed. The piston rod 16 retracts, and the piston rod 16 drives the shift fork 17 to reversely move to close the valve.

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Abstract

The invention discloses a valve actuator based on a gas-liquid combined spring. The valve actuator comprises an actuator body and a power cylinder; the power cylinder is installed on one side of the actuator body, and a gas-liquid combined spring cylinder is arranged on the other side of the actuator body and comprises a spring cylinder body, a spring piston and a spring piston rod; the spring piston rod is arranged in the spring cylinder body, and the spring piston is fixedly arranged on the spring piston rod; a gas-liquid combined spring device is arranged on the spring cylinder body and comprises a pressure container tank, and a gas input opening is formed in the upper end of the pressure container tank; a compressed gas cavity and a hydraulic oil cavity are formed in the upper portion and the lower portion of the interior of the pressure container tank, the compressed gas cavity is filled with compressed gas, and the hydraulic oil cavity is filled with hydraulic oil; and a hydraulic oil outlet is formed in the lower end of the pressure container tank.

Description

technical field [0001] The invention relates to the field of a valve actuator, in particular to a valve actuator based on a gas-hydraulic combined spring. Background technique [0002] A valve actuator is a driving mechanism that realizes the opening or closing of a valve. Its structure generally includes a power actuator, an actuator box, and a spring cylinder. 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. [0003] An actuator spring cylinder is a mechanical assembly that utilizes the elasticit...

Claims

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Application Information

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IPC IPC(8): F16K31/12F16K37/00
CPCF16K31/124F16K31/12F16K37/00
Inventor 王正权
Owner CHENGDU MAIKESEN FLUID CONTROL EQUIP
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