Pneumatic actuator

A technology of pneumatic actuators and cylinders, applied in engine components, valve details, valve operation/release devices, etc., can solve the problems of short service life and easy damage of cylinder pistons, and achieve the effect of extending service life

Inactive Publication Date: 2016-08-24
JIANGSU TONGDA MARINE TYPE VALVE & PUMP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The commonly used pneumatic actuator cylinder piston has a short service life and is easily damaged

Method used

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Embodiment Construction

[0013] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0014] like figure 1 , figure 2 As shown, a pneumatic actuator 1 includes a cylinder 2, a pair of pistons 3 are arranged in the cylinder 2, and the side of the piston 3 located outside the cylinder 2 is connected with a spring, and the piston 3 is located inside the cylinder 2 One side of each side is provided with a first rack 41 and a second rack 42, and an output shaft 5 is arranged between the pistons 3 in the cylinder 2, and the first rack 41 and the second rack 42 drive the output shaft 5 rotation, the pneumatic actuator is also provided with a first air port 61 and a second air port 62, the first air port 61 communicates with the interna...

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Abstract

The invention discloses a pneumatic actuator. The pneumatic actuator comprises a cylinder, wherein a pair of pistons are arranged in the cylinder; the sides, positioned outside the cylinder, of the pistons, are connected with springs; a first rack and a second rack are respectively arranged on the sides, positioned inside the cylinder, of the pistons; an output shaft is arranged between the pistons inside the cylinder; the first rack and the second rack drive the output shaft to rotate; a first air hole and a second air hole are further formed in the pneumatic actuator; the first air hole communicates with the internal space between the pistons; the second air hole communicates with the external space of the cylinder; and the pistons are double-layer structures comprising metal layers and ceramic layers. According to the pneumatic actuator, the pistons in a cylinder body are arranged as structures with double layers, one layer is the metal layer, the other layer is the ceramic layer, the two layers are in tight press fit, the metal layer guarantees the tensile strength of the pistons, the ceramic layer guarantees the abrasion resistance of the pistons, and the pistons are firmer and more abrasion-resistant when the two layers are combined for utilization, so that the service life of the pneumatic actuator is greatly prolonged.

Description

technical field [0001] The present invention relates to a valve component, more precisely, a pneumatic actuator. Background technique [0002] A pneumatic actuator is an actuator that uses air pressure to drive the opening and closing or adjusting the valve. It is also called a pneumatic actuator or a pneumatic device, but it is generally called a pneumatic head. This article explains the various technical requirements of the pneumatic head. The actuator and adjustment mechanism of the pneumatic actuator are a unified whole, and its actuators include film type, piston type, fork type and rack and pinion type. The piston type has a long stroke and is suitable for occasions that require a large thrust; while the thin film type has a small stroke and can only directly drive the valve stem. The fork type pneumatic actuator has the characteristics of large torque, small space, and the torque curve is more in line with the torque curve of the valve, but it is not very beautiful;...

Claims

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Application Information

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IPC IPC(8): F16K31/122F16K31/54
CPCF16K31/1221F16K31/1225F16K31/54
Inventor 顾素云陈小伟刘长荣王雪萍
Owner JIANGSU TONGDA MARINE TYPE VALVE & PUMP
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