Light corrugated pipe type thermal expansion driving device

Abstract

The invention discloses a light corrugated pipe type thermal expansion driving device, and belongs to the field of thermal expansion braking. The driving device is composed of a corrugated pipe body,a top cover, a sealing gasket and a thermal expansion medium. The device has the advantages of being novel structure and clear in working principle; a corrugated pipe body in the device can be used asa temperature sensing body filled with the thermal expansion medium, but also as an elastic element to directly sense the volume change of the thermal expansion medium so that displacement output canbe directly converted; and meanwhile contracting and stretching of the corrugated pipe can be realized by means of thermal expansion and contraction properties of the thermal expansion medium so as to drive a push rod in a temperature control valve to realize the backward and forward displacement, so that the conversion of thermal energy and mechanical energy is realized, and the output of the maximum displacement can be realized as well.

Description

technical field [0001] The invention belongs to the field of thermal expansion braking, and relates to a thermal expansion drive device, in particular to a light bellows type thermal expansion drive device which utilizes thermal expansion and contraction to realize conversion between thermal energy and mechanical energy. Background technique [0002] At present, thermal expansion braking is used in many fields, such as temperature control valves, which are widely used in the control of working fluid temperature and flow in various thermal equipment. As the core component of the thermostatic valve, the thermal expansion driver determines the performance of the thermostatic valve. A self-operated thermal expansion driver widely used at present is a paraffin temperature-sensing package, which is composed of a temperature-sensing package body, paraffin, a push rod, and rubber. The temperature sensing package has excellent performance in the field of micro-drive (less than 5mm),...

AI Technical Summary

Problems solved by technology

The current thermal expansion driver, that is, the body of the above-mentioned temperature sensing package is composed of a copper container, and the container is filled with an expansion medium such as paraffin. When the expansion medium expands to fill the container, the outward driving displacement will stop, because the driver body does not No scalability, the disadvantage of the lack of scalability of the body restricts its development of large displacement drives

In addition, because the main body cannot be stretched and contracted, the thermal expansion driver is under huge pressure in the latter part of the expansion period. In order to ensure the safety and reliability of the driver, the driver body is often made of thicker metal, resulting in a larger weight. The sealing process is more stringent and difficult

Nowadays, especially in some industrial fields, there is a great demand for large displacement drives. The original method is to install mechanical structures such as displacement amplifiers inside the temperature control valve, which not only increases the production cost, but also increases the complexity of the product. Its work The reliability is greatly reduced, so it is necessary to design a thermal expansion drive device to meet the needs of use

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