Riveting and expanding bolt bar guide sleeve for fluoroplastic heat exchange tube

Abstract

A riveting and expanding bolt bar guide sleeve for a fluoroplastic heat exchange tube comprises a leading-in section, a connecting threaded section, a clamping section and a guiding section; the leading-in section, the connecting threaded section, the clamping section and the guiding section are connected in sequence into a whole; a bolt bar chamber is formed in centers of the leading-in section, the connecting threaded section, the clamping section and the guiding section; the bolt bar chamber is matched with a diameter of a bolt bar; the bolt bar can freely move back and forth in the bolt bar chamber; an excircle diameter of the leading-in section is less than an aperture diameter of a pneumatic riveting gun; and the bolt bar guide sleeve is fixedly screwed on a clamping nozzle of the pneumatic riveting gun through the connecting threaded section. The bolt bar is pulled by the pneumatic riveting gun and the bolt bar guide sleeve to install a fluoroplastic tube in a metal top plate in an expanding manner; the bolt bar guide sleeve is simple in structure, good in centering performance and reliable to support; the bolt bar cannot skew in a pulling process, so that expanding is firm, uniform and reliable, and the condition of unilateral interlocking of the fluoroplastic tube is completely eradicated; an expanding effect and reliability are increased; and installation, replacement and maintenance are simple and convenient.

Description

Technical field: [0001] The invention relates to a pneumatic rivet expansion joint tool for fluoroplastic heat exchange tubes, in particular to a guide sleeve for fixing a rivet expansion joint bolt rod. Background technique: [0002] Metal heat exchange tubes are widely used as heat exchange equipment at present. With the continuous use of people, heat exchange tubes using metal as materials have gradually exposed more and more shortcomings. One is that metal heat exchange tubes are not resistant to Corrosion, in the increasingly severe environmental pollution, especially in chemical, pharmaceutical, pickling and other corrosive industries, metal heat exchangers not only have a short service life, but also cause safety accidents in severe cases; As the service time continues, the thickness of the fouling layer of the heat exchange tube bundle gradually increases and the heat transfer coefficient gradually decreases. Therefore, the fluoroplastic tube heat exchanger came int...

AI Technical Summary

Problems solved by technology

However, the quick joints of the existing pneumatic riveting guns are relatively short, and the orientation and neutrality are average. It is laborious to insert the bolt rod into the jaw of the pneumatic riveting gun, and the jaw of the pneumatic riveting gun can only bite the bolt rod of 3-5 mm. , this kind of riveting method has no reliable support for the thicker roof and cover plate, and the bolt rod is prone to skewing, which leads to uneven expansion of the metal expansion core and unilateral occlusion of the fluorine plastic tube, which affects Expansion effect and firmness

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