Boiler tube expanding head for boiler tube expanding machine

Abstract

The invention discloses a tube expanding device, in particular to a tube expanding head for the tube expander, which mainly utilizes the device to enable the heat exchange pipe of a heat exchanger and a tube sheet to be expanded for stable sealing. The invention comprises a gatling (10), a conical mandrel (11) arranged inside the gatling (10), at least two vertical long holes evenly distributed on the circumference of the lateral wall of the gatling (10), a pin roller (15) arranged in each long hole. The tube expanding device has the advantages of enabling the sealing between the heat exchange pipe and the tube sheet 2 to be tighter, and the leakage phenomena of the mediator not to happen during the work.

Description

technical field

[0001] The invention relates to a tube expansion device, in particular to a tube expander head for a tube expander, which mainly uses the device to expand the heat exchange tube and the tube plate on the heat exchanger so as to make them tightly sealed. Background technique

[0002] There are several heat exchange tubes arranged in parallel in the heat exchanger. The ends of the heat exchange tubes are connected to the tube plate. When installing, insert the ends of the heat exchange tubes into the holes on the tube plate, and then use the The tube expansion head expands the heat exchange tubes so that they are closely connected with the tube sheet, which not only plays the role of fixed connection, but also plays the role of sealing (see Figure 1). The expansion effect of the existing expansion tube head is not good, and leakage often occurs between the heat exchange tube and the tube sheet, and finally the different media in the tube side and the shell side...

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