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Linear-stroke pneumatic actuator

A pneumatic actuator, straight-stroke technology, applied in the direction of engine components, valve details, valve operation/release devices, etc., can solve the pressure resistance of the sealing ring, the sealing performance cannot meet the actual requirements, and the straight-stroke pneumatic actuator does not work properly Stability, piston and cavity are easy to wear and other problems, to achieve the effect of light weight, simple structure, safe and reliable performance

Inactive Publication Date: 2013-01-09
SHANDONG DINGTAI ENERGY SAVING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the operation of opening or closing the valve, a general straight-stroke pneumatic actuator is used, in which the piston is directly dynamic and sealed with the inner side of the cavity, or an O-ring is installed around the piston to directly contact the cavity wall. The dynamic contact between the piston and the cavity is extremely easy to wear, resulting in unstable operation of the linear stroke pneumatic actuator
Moreover, in use, the compression resistance and sealing performance of the sealing ring cannot meet the actual requirements. When the intake pressure is too large, the sealing ring is prone to stress concentration and deformation, resulting in air leakage, bubbling or even tearing of the sealing ring.
Even if the motor drives the operation, it is convenient and at the same time at the cost of high cost, and the motor is prone to failure, so this method is not an ideal choice

Method used

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  • Linear-stroke pneumatic actuator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1 prepares the used diaphragm of linear stroke pneumatic actuator

[0026] Raw material component parts by weight are as follows:

[0027] 30kg of silica gel, 20kg of nitrile rubber, 15kg of fluorine rubber, 25kg of EPDM rubber, and 5kg of connecting cloth.

[0028] The production method comprises the following process steps:

[0029] Weigh the raw materials; mix the prepared raw materials, the temperature of the rubber mixing is 52°C, and the time is 30 minutes; then fill the refined rubber into the abrasive tool, one layer of rubber and one layer of cloth, until three layers of cloth are loaded; Cover the mold cover and put it into a vulcanizer for vulcanization. The temperature during the vulcanization process is 140°C. After 60 minutes, the vulcanized diaphragm is formed, and the required diaphragm can be obtained after stopping the machine.

[0030] After testing, the working pressure range of the diaphragm in this embodiment is 0.7MPa, the life span i...

Embodiment 2

[0031] Embodiment 2 prepares the used diaphragm of linear stroke pneumatic actuator

[0032] Raw material component parts by weight are as follows:

[0033] 30kg of silica gel, 30kg of nitrile rubber, 25kg of fluorine rubber, 30kg of EPDM rubber, and 10kg of connecting cloth.

[0034] The production method comprises the following process steps:

[0035] Weigh the raw materials; mix the prepared raw materials at a temperature of 55°C for 40 minutes; then fill the refined rubber into the abrasive tool, one layer of rubber and one layer of cloth, until three layers of cloth are loaded; Cover the mold cover and put it into the vulcanizer for vulcanization. During the vulcanization process, the temperature is controlled at 160°C. After 70 minutes, the vulcanized diaphragm is formed, and the required diaphragm can be obtained after stopping the machine.

[0036] After testing, the working pressure range of the diaphragm in this embodiment is 0.62MPa, the service life is up to 3345...

Embodiment 3

[0037] Embodiment 3 prepares the used diaphragm of linear stroke pneumatic actuator

[0038] Raw material component parts by weight are as follows:

[0039] 20kg of silica gel, 20kg of nitrile rubber, 15kg of fluorine rubber, 20kg of EPDM rubber, and 5kg of connecting cloth.

[0040] The production method comprises the following process steps:

[0041] Weigh the raw materials; mix the prepared raw materials, the mixing temperature is 60°C, and the time is 38 minutes; then fill the refined rubber into the abrasive tool, one layer of rubber and one layer of cloth, until three layers of cloth are loaded; Cover the mold cover and put it into the vulcanizer for vulcanization. During the vulcanization process, the temperature is controlled at 150°C. After 50 minutes, the vulcanized diaphragm is formed, and the required diaphragm is obtained after stopping the machine.

[0042] After testing, the working pressure range of the diaphragm in this embodiment is 0.56MPa, the life span i...

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Abstract

The invention discloses a linear-stroke pneumatic actuator. The linear-stroke pneumatic actuator comprises a sealed cavity, an air inlet channel is arranged on one side of the cavity, a piston is arranged in the cavity, a piston rod is arranged in the middle of the piston in a linkage mode, a device which drives a valve to open and close is arranged at one end of the piston rod, which corresponds to a connecting end between the piston rod and the piston, a spring is arranged on the other side of the cavity, the spring abuts against an inner bottom surface of the piston and the cavity, a membrane is installed on the upper portion of the piston, and periphery of the piston and the inner side surface of the cavity are in motive seal fit through the membrane. The fitting structure is adopted, non-contact working of the linear-stroke pneumatic actuator can be achieved, the pneumatic actuator is durable and pressure resistant, and the working time is safe and reliable.

Description

technical field [0001] The invention relates to the technical field of pneumatic actuators, in particular to a straight-stroke pneumatic actuator. Background technique [0002] At present, in the operation of opening or closing the valve, a general straight-stroke pneumatic actuator is used, in which the piston is directly dynamic and sealed with the inner side of the cavity, or an O-ring is installed around the piston to directly contact the cavity wall. The dynamic contact between the piston and the cavity is extremely easy to wear, resulting in unstable operation of the linear stroke pneumatic actuator. Moreover, in use, the compression resistance and sealing performance of the sealing ring cannot meet the actual requirements. When the intake pressure is too large, the sealing ring is prone to stress concentration and deformation, resulting in air leakage, bubbling or even tearing of the sealing ring. Even if the motor drives the operation, it is convenient at the same t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K31/126F16K31/145B32B25/10C08L83/04C08L9/02C08L27/12C08L23/16B29C35/02
Inventor 冯启云袁桔红
Owner SHANDONG DINGTAI ENERGY SAVING TECH
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