Gas regulator with non-metal components (variants)

Abstract

The gas regulator with non-metal components comprises a diaphragm (4), a body (1), an adjustment screw (2), and a cap (3) made of a non-metal thermoplastic material with molded threads. The body (1) is connected to the cap (3) via a large-diameter thread (6), and the adjustment screw (2) is mounted in the cap via a small diameter thread (5); the molded threads on the cap (3) have an equal pitch h and are arranged coaxially. The cap (3), the adjustment screw (2) and the body (1) are made of glass-nylon composite with molded coaxial threads.

Description

technical field [0001] The present invention relates to an automatic pressure regulating device, which can be applied in different industries to reduce and regulate the pressure (flow rate) of various gases (oxygen, acetylene, propane, etc.). Background technique [0002] Gas regulators known in the art consist of a non-metallic element (in particular a diaphragm) and a threaded metal element comprising a body, an adjusting screw and a cover (see documents DE831050, G05D 16 / 06, 1952 and RU 2117325, G05D 16 / 06, 1998). [0003] The main structural parts of gas regulators are made of metal due to their operating conditions. Gas regulators with small overall dimensions (thread diameter not greater than 60mm) are produced continuously and are used in various environmental conditions with various Gases, including corrosive gases, are used, therefore, requiring high mechanical strength and physical and chemical resistance to internal and external influences. [0004] The metal p...

AI Technical Summary

Problems solved by technology

[0015] However, this substitution creates a complex technical problem: it is not possible to obtain a high-quality surface, and in particular it is impossible to obtain a high-quality thread on plastic by machining (which is necessary in gas regulators)

[0027] Polyacetals are not resistant to acid environments and, moreover, readily decompose when exposed to UV radiation

[0028] Polyester is not resistant to UV radiation, causing it to lose 40% of its strength in annual operation in an atmospheric environment

[0029] When operating outdoors, conventional polyamides become saturated with humidity as high as 8%, which causes a loss of strength during outdoor operation in all weathers

Moreover, it is not resistant to the sun's ultraviolet radiation

[0030] Polyvinyl fluoride is not chemically resistant to ketones, which makes it virtually unusable for use in acetylene gas regulators, and is relatively more expensive

[0031] PTFE has very low strength properties which render it virtually unusable as a structural material

[0032] PEEK does not have the typical disadvantages of most polymers, but is extremely expensive (comparable to the cost of copper alloys in a single project)

Moreover, the injection molding process of PEEK has not been properly developed

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