CN102091741A

CN102091741A - Inclined expanding bead threaded tube expander

Info

Publication number: CN102091741A
Application number: CN 201010273211
Authority: CN
Inventors: 张国荣
Original assignee: Tianxun Machine & Tool Technology Co Ltd
Current assignee: WUJIANG GULI TUBE EXPANDER CO., LTD.
Priority date: 2010-09-06
Filing date: 2010-09-06
Publication date: 2011-06-15
Anticipated expiration: 2030-09-06
Also published as: CN102091741B

Abstract

The invention relates to an inclined expanding bead threaded tube expander, which comprises an expanding shell, an expanding bead arranged in the expanding shell, and an expanding rod passing through the expanding shell, wherein the rear of the expanding bead and the middle of the expanding rod are marked with threads; the expanding bead is inclined in the expanding shell; and an included angle A ranging from 5 to 15 degrees is formed between the center line of the expanding bead and the center line of the expanding rod. When the inner and outer diameters of a tube are expanded, the expanding bead is inclined in the expanding shell and is screwed in along the expanding rod clockwise or anticlockwise, and the screw-in resistance is reduced; moreover, the threads of the expanding rod are matched with the threads of the expanding bead, so the expanding shell cannot retreat and the fine adjustment function can be realized when the inner and outer diameters of the tube are expanded.

Description

A kind of pearl screw-type tube expander that tiltedly expands

Technical field

The present invention relates to a kind of tube expander, especially a kind of pearl screw-type tube expander that tiltedly expands that reduces the precession resistance and can promote precession dynamics, fine-tuning expansion.

Background technology

Tube expander be make, all kinds of containers of maintenance are to be used for the inside and outside footpath of enlarged pipe, are to combine closely in the tube-to-tube sheet connection contact site, can not leak, leak gas and can bear a kind of expanded joint instrument of certain pressure.At present, the tube expander that expanded joint on the market is used, all be to adopt vertical being placed in the bloated shell of the pearl level that expands, the groove of the trapezoidal pattern of the Eight characters in offering on the bloated shell, when the precession tube interior, can produce bigger resistance, and, can contract after making tube expander because of the toughness of tubing, the words of exerting oneself excessive can might be burst the critical point.

Summary of the invention

Technical problem to be solved by this invention provides a kind of pearl screw-type tube expander that tiltedly expands that reduces the precession resistance and can promote precession dynamics, fine-tuning expansion.

The present invention solves the technical scheme that its technical problem takes; A kind of pearl screw-type tube expander that tiltedly expands comprises bloated shell, built-in bloated pearl and passes the expander roll of the shell that expands that all be carved with screw thread at the rear portion of the pearl of expanding with the middle part of expander roll, the pearl of expanding is tilting in bloated shell.

In order to lower resistance, along expander roll during clockwise or counterclockwise precession, described bloated pearl is tilting in the inside of the shell that expands on bloated pearl, and the center line of the pearl of expanding becomes included angle A with the center line of the expander roll of expander roll, and the scope of included angle A is 5 ° to 15 °.

In order to promote precession dynamics, and fine-tuning enlarged pipe, the screw thread of described bloated pearl rear end is can be intermeshing in real work with screw thread in the middle part of the expander roll.

After adopting said structure, when the inside and outside footpath of expansion pipe, the pearl of expanding is tilting in the shell that expands, along expander roll take advantage of a situation pin or counterclockwise precession, reduced the precession resistance, and, under the collocation of screw thread on screw thread on the expander roll and the bloated pearl, bloated shell can not produce and retreat phenomenon, can play the effect of fine setting during the inside and outside footpath of enlarged pipe yet.

Description of drawings

The present invention is further described below in conjunction with accompanying drawing.

Fig. 1 adopts the schematic diagram of broken section for the present invention;

Fig. 2 for the stereogram of the pearl of expanding '

1, bloated shell 2, bloated pearl 3, expander roll 31, screw thread

The specific embodiment

A kind of pearl screw-type tube expander that tiltedly expands shown in Figure 1, comprise and expand shell 1, built-in bloated pearl 2 and pass the expander roll 3 of the shell that expands, screw thread all is carved with at the rear portion of pearl 2 and the middle part of expander roll 3 expanding, described bloated pearl 2 is tilting in the inside of the shell 1 that expands, the center line of bloated pearl 2 becomes included angle A with the center line of expander roll 3, included angle A scope be 5 ° to 15 °, the pearl 2 tilting effects in the shell 1 that expands of expanding are that to make bloated shell be that resistance reduces to the tube interior precession.

Bloated pearl 2 shown in Figure 2 when the screw thread at the screw thread of pearl 2 rear ends of expanding and expander roll 3 middle parts produces engagement, can be finely tuned the degree of depth that enters of the shell 1 that expands, and the phenomenon that contracts after bloated shell 1 can not produced because of the toughness of tubing in the precession process.

When the inside and outside footpath of expansion pipe, the pearl 2 of expanding is tilting in bloated shell 1, along expander roll 3 take advantage of a situation pin or counterclockwise precession, reduced the precession resistance, and, under the collocation of screw thread on screw thread on the expander roll 3 and the bloated pearl 2, the shell 1 that expands can not produce and retreat phenomenon, can play the effect of fine setting during the inside and outside footpath of enlarged pipe yet.

Claims

1. pearl screw-type tube expander that tiltedly expands comprises bloated shell (1), built-in bloated pearl (2) and passes the expander roll (3) of bloated shell (1), it is characterized in that: all be carved with screw thread (31) at the rear portion of bloated pearl (2) and the middle part of expander roll (3).

2. the pearl screw-type tube expander that tiltedly expands according to claim 1, it is characterized in that: described bloated pearl (2) is tilting in the inside of the shell (1) that expands, the center line of the pearl (2) of expanding becomes included angle A with the center line of expander roll (3), included angle A scope be 5 ° to 15 °.