CN201900191U

CN201900191U - Deflective expansion preventing pipe expander

Info

Publication number: CN201900191U
Application number: CN2010206768801U
Authority: CN
Inventors: 杜世民; 高杰; 卫海洋
Original assignee: CHINA MACHINERY INDUSTRY MECHANIZED CONSTRUCTION Co; CHINA MECHANICAL INDUSTRY CONSTRUCTION GENERAL Co
Current assignee: CHINA MACHINERY INDUSTRY MECHANIZED CONSTRUCTION Co; CHINA MECHANICAL INDUSTRY CONSTRUCTION GENERAL Co
Priority date: 2010-12-23
Filing date: 2010-12-23
Publication date: 2011-07-20
Anticipated expiration: 2020-12-23

Abstract

The utility model relates to a deflective expansion preventing pipe expander, which comprises an expansion column (1), an expansion rod (2) and a housing (3), wherein a thin diameter lower end of the expansion rod (2) is provided with a guide body (4). The guide body (4) is in a cylindrical shape, the center of the guide body is provided with a conical hole (401), and the conical degree of the conical hole (401) is the same as that of the expansion rod (2). The guide body (4) and the thin diameter lower end of the expansion rod (2) are mutually plugged through the conical hole (401), and are fixed by a check ring (6) and a cotter (5) after plugging. The cylindrical outer diameter of the guide body (4) is movably matched with the inner diameter of an expansion pipe (7). The arranged guide body makes conventional one-point support of the expansion rod (2) into two-point support. The guide body (4) enables the expansion rod (2) to advance along the central line of the expansion pipe (7), deflective expansion is not generated when the expansion pipe (7) is operated, and the pass rate and the efficiency of the expansion pipe (7) are greatly improved.

Description

Prevent bloated partially tube expander

Technical field

The utility model relates to a kind of conduit and the expand tube tool that tube sheet, conduit are connected with conduit, the tube expander that preventing of relating to particularly that a kind of bloated post do not wander off expanded partially.

Background technology

Referring to Fig. 5.The tradition tube expander is after inserting expand tube, owing to have only bloated post 1 ' supporting expander roll 2 ', the strong point of bloated post 1 ' acts on expander roll 2 ' same cross section radially and is a holding state, expander roll 2 ' is axially played pendulum, when carrying out the expand tube operation, expander roll 2 ' axis is easy to deflection expand tube axis, forms bloated partially.Want control and expand partially, then rely on operator's skill and experience fully.This shows that traditional tube expander is unreliable because of expander roll 2 ' work, need the still low phenomenon of higher operative skill workpiece qualification rate although cause.

The utility model content

The purpose of this utility model is the shortcoming that overcomes prior art, provides a kind of work efficiency easy and simple to handle fast, the tube expander that the preventing partially of expander roll reliable operation expanded.

Be to realize technique scheme, after the utility model improves the traditional tube expander that comprises bloated post, expander roll and housing, provided and prevented the tube expander that expands partially that of the present utility modelly prevent bloated partially tube expander, the lower end, thin footpath of wherein said expander roll is provided with guide way.

The utility model prevents bloated partially tube expander, and wherein said guide way is cylindric, and the center is provided with bellmouth, and the tapering of described bellmouth equates with described expander roll tapering.

The utility model prevents bloated partially tube expander, and wherein said guide way is pegged graft each other by bellmouth and lower end, the thin footpath of described expander roll, and the cylinder external diameter of described guide way and expand tube internal diameter are for movingly, and cylinder length equates with the expand tube external diameter.

The utility model prevents that the tube expander difference from prior art that expands partially is that the utility model prevents that the tube expander that expands partially is provided with guide way at the thin footpath of expander roll lower end, becomes 2 supports with traditional expander roll by some supports like this.Guide way makes expander roll along being advanced by the center line of expand tube, and the expand tube operation does not produce partially expands, and expand tube qualification rate and work efficiency all greatly improve.

Below in conjunction with accompanying drawing the tube expander that expands partially that prevents of the present utility model is described further.

Description of drawings

Fig. 1 prevents bloated partially tube expander structure chart for the utility model;

Fig. 2 prevents bloated partially tube expander user mode figure for the utility model;

Fig. 3 prevents bloated partially tube expander expander roll support concept figure for the utility model;

Fig. 4 guide way profile.

Fig. 5 is traditional tube expander expander roll support concept figure.

The specific embodiment

As Fig. 1, Fig. 2, shown in Figure 3, the utility model prevents that the tube expander that expands partially from being the improvement to traditional tube expander.It comprises expand post 1, expander roll 2 and housing 3.The utility model prevents that partially the tube expander that expands installed a guide way 4 in bottoms, expander roll 2 thin footpath.Guide way 4 is cylindrical shape, and the center is provided with bellmouth 401 (referring to Fig. 4).The tapering of bellmouth 401 equates with the tapering of expander roll 2.Guide way 4 is pegged graft each other by bellmouth 401 and lower end, expander roll 2 thin footpath, and the back of pegging graft is fixed on the expander roll 2 by split pin 5 by back-up ring 6.

Referring to Fig. 2.The cylinder external diameter of guide way 4 and the internal diameter of expand tube 7 are for movingly.In the utility model, guide way 4 is big or small supporting with tube expander model that prevents to expand partially and expand tube caliber.Less than expand tube 7 internal diameter 0.5mm, cylinder length equals can design multiple model under the prerequisite of expand tube 7 external diameters at the cylinder external diameter of guide way 4.

By the tube expander structure as can be known, each bloated post is parallel to each other with the bus that the expand tube inwall contacts, and guarantees that the expansion segment of expand tube is cylindric; Each bloated post presses to the expand tube inwall by expander roll 2 ', and expander roll 2 ' is then by bloated post supporting.In extrusion process,, and make and the form that becomes a contact that contacts of bloated post and expander roll 2 ' cause expander roll 2 ' to be in unsettled bearing state because the axis of the post that expands has an angle with the axis of expand tube.Housing only works to prevent that bloated post is scattered.The tapering of post is one times of angle effect that reaches between bloated mast axis and expand tube axis of expander roll 2 ' tapering owing to expand, and during tube expander work, makes expander roll 2 ' in the axial helical rotation feeding of expand tube.Expander roll 2 ' rotates by the moving housing of the cornice that expands, bloated post in the housing then rolls in the friction drive lower edge of expander roll 2 ' expand tube spiral inner wall formula and advances, axially form feeding at expand tube, post is along the amount of feeding of expand tube axial feeding less than expander roll 2 ' owing to expand, thereby, make the expand tube expansion in the radially formation feeding of expand tube.

Originally prevent that the tube expander that expands partially is identical with traditional tube expander operation principle.During use, ajust preventing bloated partially tube expander position,, and make post 1 applying expand tube 7 tube walls that expand, rotate expander roll 2 afterwards and carry out expand tube, finish the expansion of expand tube 7 ends by the extruding of bloated post 1 with the expand tube 7 pore ends that prevent that the tube expander that expands partially from inserting needs expansion.

Above-described embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that those of ordinary skills make the technical solution of the utility model all should fall in the definite protection domain of the utility model claims.

Claims

1. a tube expander that prevents to expand partially comprises bloated post (1), expander roll (2) and housing (3), it is characterized in that the lower end, thin footpath of described expander roll (2) is provided with guide way (4).

2. the tube expander that expands of preventing partially according to claim 1 is characterized in that described guide way (4) is cylindric, and the center is provided with bellmouth (401), and the tapering of described bellmouth (401) equates with the tapering of described expander roll (2).

3. the tube expander that expands of preventing partially according to claim 2, it is characterized in that described guide way (4) pegs graft each other by lower end, the thin footpath of bellmouth (401) and described expander roll (2), the cylinder external diameter of described guide way (4) and expand tube (7) internal diameter are for movingly, and cylinder length equates with expand tube (7) external diameter.