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Miniaturized pneumatic-hydraulic linkage actuator for large-diameter valve and low air source

A pneumatic actuator, large-diameter technology, applied in the direction of valve operation/release device, valve details, valve device, etc., can solve the problems of limited output force, frequent fluctuation of air source pressure, and synchronous transmission of air and oil, etc. Achieve the effect of reducing the size and volume, reducing space occupation, and expanding the application conditions

Pending Publication Date: 2019-02-15
CHENGDU MAIKESEN FLUID CONTROL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the specific situation where there are many branches of urban gas and natural gas pipelines, and the operating pressure and gas consumption are unstable, the gas-liquid linkage actuator must meet the minimum working pressure of 0.6MPa, when the minimum working pressure of the pipeline is met, or the gas source pressure is low. Under certain circumstances, if it is necessary to open and close the valve normally, and ensure that the remote and local control of the actuator and the emergency valve closing function can still be realized under the lowest pressure, the traditional gas-hydraulic linkage actuators are used to drive large-diameter valves with large torque. Therefore, it is necessary to choose the actuator of the hydraulic cylinder with large model and large bore, which means to choose an enlarged gas-liquid tank and add more hydraulic oil, and the overall size and volume of the gas-liquid tank must be increased. It takes up a lot of space, and it is inconvenient to package, transport and install. The pressure of the air source fluctuates frequently, and it cannot work smoothly.

Method used

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  • Miniaturized pneumatic-hydraulic linkage actuator for large-diameter valve and low air source
  • Miniaturized pneumatic-hydraulic linkage actuator for large-diameter valve and low air source
  • Miniaturized pneumatic-hydraulic linkage actuator for large-diameter valve and low air source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 As shown, the pneumatic actuator is installed on one side of the shift fork transmission box 1 ( figure 1 is the left side), the hydraulic actuator is installed on the other side of the shift fork transmission box 1 ( figure 1 is the right side), the output mechanism of the pneumatic actuator is connected to the output mechanism of the hydraulic actuator, the fork drive slider 10 is provided on the fork transmission block, and the fork 8 of the fork transmission box 1 A bar-shaped chute 9 matched with the shift fork driving slider 10 is provided on the top.

[0043] The hydraulic actuator is a hydraulic cylinder 3, and the output mechanism of the hydraulic cylinder 3 is a first piston rod 3.2. The hydraulic cylinder 3 includes a first cylinder body 3.1 and a first cylinder block 3.3. The first cylinder body 3.1 The first cylinder base 3.3 is installed on the box body of the shift fork transmission box 1, and the first piston rod 3.2 passes through the...

Embodiment 2

[0057] Such as image 3 As shown, the difference between Embodiment 2 and Embodiment 1 is that an isolation bladder 2.4 is provided in the gas-liquid tank 2, and the opening of the isolation bladder 2.4 is sealed and installed on the air inlet and outlet 2.2, and the isolation bladder 2.4 seals the tank Body 2.1 The inner cavity is separated into a gas cavity and a liquid cavity, the inside is a gas cavity, and the outside is a liquid cavity.

[0058] Preferably, the air inlet and outlet 2.2 and the liquid inlet and outlet 2.3 are provided with connecting joints, and the isolation bladder 2.4 is connected to the connecting joints through a sealing assembly.

[0059] It works as follows:

[0060] Working condition 1: The pneumatic control system controls the air intake of the right air-liquid tank 2. When the right air-liquid tank 2 increases the air pressure, the isolation bladder 2.4 in the right isolation tank expands, and the hydraulic oil in the right isolation tank is sq...

Embodiment 3

[0065] Such as Figure 5 As shown, the difference between Embodiment 2 and Embodiment 1 is that the first pneumatic control system and the second pneumatic control system are independent pneumatic control systems. Principle is the same as embodiment 1.

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Abstract

The invention discloses a miniaturized pneumatic-hydraulic linkage actuator for a large-diameter valve and a low air source. The miniaturized pneumatic-hydraulic linkage actuator comprises a shiftingfork transmission box, a gas-liquid tank assembly, a hydraulic actuating element and at least one pneumatic actuating element; each gas-liquid tank assembly is composed of two gas-liquid tanks, and gas inlets and gas outlets of tank bodies are connected with a pneumatic control system through gas path pipelines; two gas inlet and exhaust ports of the pneumatic actuating elements are connected withthe pneumatic control system through gas path pipelines; and the pneumatic actuating elements and the hydraulic actuating element are installed on one side of the shifting fork transmission box in series or installed on the two sides of the shifting fork transmission box separately. The miniaturized pneumatic-hydraulic linkage actuator is especially suitable for the condition that the gas sourcepressure is 0.6 MPa-1.2 MPa, no matter how the hydraulic actuating element and the pneumatic actuating elements are installed in series, power gas can continuously output hydraulic oil through the gas-liquid tanks to drive hydraulic oil cylinder acting valves and drive air cylinder acting valves through pneumatic output, air cylinders and hydraulic oil cylinders output thrust, the thrust is addedin series, and the output power is added multiple times.

Description

technical field [0001] The invention relates to the technical field of application of gas-liquid linkage actuators under low gas source conditions, in particular to a miniaturized gas-liquid linkage actuator suitable for large-caliber valves and low gas sources. Background technique [0002] In the specific situation where there are many branches of urban gas and natural gas pipelines, and the operating pressure and gas consumption are unstable, the gas-liquid linkage actuator must meet the minimum working pressure of 0.6MPa, when the minimum working pressure of the pipeline is met, or the gas source pressure is low. Under certain circumstances, if it is necessary to open and close the valve normally, and ensure that the remote and local control of the actuator and the emergency valve closing function can still be realized under the lowest pressure, the traditional gas-hydraulic linkage actuators are used to drive large-diameter valves with large torque. Therefore, it is nec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K31/124F15B11/072F15B13/06
CPCF15B11/072F15B13/06F16K31/124F15B2211/71F15B2211/205
Inventor 王正权李宜华黄魏
Owner CHENGDU MAIKESEN FLUID CONTROL EQUIP
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