CN102430657A

CN102430657A - Tube expander

Info

Publication number: CN102430657A
Application number: CN2012100087167A
Authority: CN
Inventors: 徐正明; 马国伟; 王元领; 贾志伟; 魏泽斌; 程志明
Original assignee: XINYANG SITONG MECHANICAL MANUFACTURING Co Ltd
Current assignee: XINYANG SITONG MECHANICAL MANUFACTURING Co Ltd
Priority date: 2012-01-12
Filing date: 2012-01-12
Publication date: 2012-05-02
Anticipated expiration: 2032-01-12
Also published as: CN102430657B

Abstract

The invention relates to a tube expander. The tube expander comprises a cylinder, eight groups of expanding roll structures, a leading screw, a conical plate and a leading screw sleeve, wherein each expanding roll structure comprises a swinging arm, an expanding roll framework of which a back end part is fixed to one end of the swinging arm, roll shafts which are installed on a left side wall and a right side wall of the expanding roll framework, and expanding rolls which are installed on the roll shafts through bearings; the other end of the swinging arm is hinged with the tail end of the cylinder; the expanding roll framework is arranged on the front part of the cylinder; the inner end of the leading screw is fixed inside the cylinder; the leading screw is parallel to an axial center line of the cylinder; an outer end part of the leading screw extends out of a cylinder opening at the front end of the cylinder; the conical plate is sleeved on the leading screw; the leading screw sleeve is installed on the leading screw; the conical plate is arranged between the expanding roll framework and the leading screw sleeve; the side surface of an excircle of the conical plate is a conical surface; a conical fan-shaped camber which is matched with the conical surface is arranged on a front end part of the bottom surface of the expanding roll framework; and the conical surface of the conical plate is arranged correspondingly to the conical fan-shaped camber of the expanding roll framework. The tube expander has the advantages of scientific design, high practicality, high production efficiency and reliable production quality.

Description

Tube expander

Technical field

The present invention relates to a kind of equipment of process pipeline, specifically, related to a kind of tube expander that is used for process pipeline.

Background technology

Expansion tube is a kind of critical piping of using in the expanded perlite processing technology, because the expansion tube body is long, caliber is bigger, does not have ready-made matured product on the market; Existing expansion tube is used the rolling machine roll-forming; But because stainless intensity is big, roll very difficulty, before each pipe crimping; All need manual work that pre-bending is carried out in the steel plate end; Finished product circularity that rolls out like this and straightness error are all very big, and deviation from circular from is generally 6mm, and straightness error is generally 10mm; Because these two errors are bigger, cause expansion furnace difficult installation, expansion tube poor sealing performance on every side; Usually, expansion tube rolled and welding fabrication after, need to adopt the linearity and the circularity of expand tube device correction pipeline; But the bloated roller of existing expand tube device is for fixedly installing, and is easy to wear; Life-span is short, during use, is prone to expansion tube is caused damage; And the bloated roller angle of expand tube device can't be regulated, and causes its suitable caliber scope to be restricted.

In order to solve the problem of above existence, people are seeking a kind of desirable technical solution always.

Summary of the invention

The objective of the invention is the deficiency to prior art, thus provide a kind of design science, practical, production efficiency is high, the quality of production is reliable, the circularity of institute's process pipeline and the low-down tube expander of straightness error.

To achieve these goals, the technical scheme that the present invention adopted is: a kind of tube expander, and it comprises that cylinder, N organize awl dish and the leading screw sleeve that the bloated roll structure, leading screw, the center that are distributed in said cylinder lateral surface have the leading screw trepanning; Wherein, said bloated roll structure comprises the fixing bloated roller framework of swing arm, rearward end and said swing arm one end, is installed in the roll shaft on the wall of the said bloated roller framework left and right sides and is installed in the bloated roller on the said roll shaft through bearing; The said swing arm other end and said cylinder end are hinged, and said bloated roller framework is arranged on said cylinder leading section; Said leading screw the inner is fixed in the said cylinder, the axial centre line parallel of said leading screw and said cylinder, and said cylinder front end nozzle is stretched out in said leading screw outer end; Said awl dish is contained on the said leading screw through said screw set borehole jack, and said leading screw sleeve is installed on the said leading screw, and said awl dish is arranged between the bloated roller framework and said leading screw sleeve of the bloated roll structure of N group; The cylindrical side of said awl dish is a taper seat, and the bottom surface leading section of said bloated roller framework has the awl fan-shaped curved surface that cooperates with said taper seat, and the awl fan-shaped curved surface of the corresponding said bloated roller framework of the taper seat of said awl dish is provided with; N is not less than 3 natural number.

Based on above-mentioned, vertical fixing has gag lever post on the outer wall of said cylinder, and said gag lever post top is fixed with limited cover; Said swing arm is provided with perforation, and said perforation is made up of the spacing hole on top and the bar hole of bottom, and the aperture of said spacing hole is greater than the aperture in said bar hole; Said gag lever post passes said perforation setting, is equipped with back-moving spring on the said gag lever post, and the port edge that is located at said limited cover and said bar hole is pushed up at said back-moving spring two ends respectively.

Based on above-mentioned, said awl dish comprises ring-type awl dish, is positioned at disk and four ribs plate that said ring-type is bored disk center, and wherein, said gusset connects said ring-type awl dish and said interior disk respectively, between said ring-type awl dish and the said interior disk annular gap is arranged; The front end barrel of said cylinder offers four axial limiting grooves, and the leading section of said cylinder is plugged in the said annular gap, and four said gussets are separately positioned in four said axial limiting grooves.

Based on above-mentioned, the lateral surface of said cylinder is evenly distributed with eight groups of said bloated roll structures.

Based on above-mentioned, be positioned on the same circle with said cylinder longitudinal center line vertical range point farthest on the bloated roller roll surface of the bloated roll structure of N group, said bloated roller is that diameter is the bloated roller of the little gradual change type in both sides broad in the middle.

Based on above-mentioned, said cylinder end is provided with bail.

The relative prior art of the present invention has outstanding substantive distinguishing features and marked improvement, and specifically, the present invention has cone internal expansion type structure, and tube expander work external diameter can be adjusted as required, and when bloated roller weares and teares, can carry out adequate compensation; The roller that expands adopts rolling structure, has increased the rotation flexibility of bloated roller, can reduce the damage of roller to the expansion tube inwall of expanding; Bloated roller is selected superior alloy steel for use and through Quenching Treatment, is made the roller that expands have longer service life; Therefore, the present invention have design science, practical, production efficiency is high, the reliable advantage of the quality of production.

Description of drawings

Fig. 1 is a cross-sectional view of the present invention.

Fig. 2 is the structural representation of eight groups of said bloated roller frameworks.

Fig. 3 is the planar structure sketch map of said awl dish.

Fig. 4 is the cross-sectional view of said awl dish.

Fig. 5 is the structural representation of said cylinder.

Fig. 6 is a side structure sketch map of said cylinder.

Fig. 7 is the opposite side structural representation of said cylinder.

Among the figure: 1. cylinder, 2. leading screw, 3. leading screw trepanning, 4. awl dish, 5. leading screw sleeve, 6. swing arm; 7. the roller framework that expands, 8. roll shaft, the roller that 9. expands, 10. gag lever post, 11. limited covers; 12. spacing hole, 13. bar holes, 14. back-moving springs, 15. ring-type awl dishes, 16. interior disks; 17. gusset, 18. annular gaps, 19. axial limiting grooves, 20. bails, 21. swing arm seats.

The specific embodiment

Through the specific embodiment, technical scheme of the present invention is done further detailed description below.

Like Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and shown in Figure 7, a kind of tube expander, it comprises that bloated roll structure, leading screw 2, center that cylinder 1, eight groups are evenly distributed on said cylinder 1 lateral surface have the awl dish 4 and the leading screw sleeve 5 of leading screw trepanning 3.

Wherein, said bloated roll structure comprises the fixing bloated roller framework 7 of swing arm 6, rearward end and said swing arm 6 one ends, is installed in the roll shaft 8 on said bloated roller framework 7 left and right sides walls and is installed in the bloated roller 9 on the said roll shaft 8 through bearing; Said bloated roller 9 is selected superior alloy steel for use and through Quenching Treatment.

The circumferencial direction that said cylinder 1 end is fixed with the said cylinder 1 in 21, eight groups of swing arm seats of eight groups of swing arm seats, 21 edges evenly distributes; Said swing arm 6 other ends and said swing arm seat 21 are hinged, and said bloated roller framework 7 is arranged on said cylinder 1 leading section, being centered close on the same circle of eight groups of said bloated roller frameworks 7.

Said leading screw 2 the inners are fixed in the said cylinder 1, and said leading screw 2 is positioned on the longitudinal center line of said cylinder 1, and said cylinder 1 front end nozzle is stretched out in said leading screw 2 outer ends; Said awl dish 4 is sleeved on the said leading screw 2 through said leading screw trepanning 3, and said leading screw sleeve 5 is installed on the said leading screw 2, and said awl dish 4 is arranged between the bloated roller framework 7 and said leading screw sleeve 5 of eight groups of roll structures that expand.

The cylindrical side of said awl dish 4 is taper seats, and the bottom surface leading section of said bloated roller framework 7 has the awl fan-shaped curved surface that cooperates with said taper seat; The awl fan-shaped curved surface of the corresponding said bloated roller framework 7 of the taper seat of said awl dish 4 is provided with, and forms a kind of matching relationship between the two, so as awl when coiling 4 moving linearlies, can promote eight groups expand roller frameworks 7 to around open; During concrete the use, rotating threaded shaft sleeve 5 makes it along leading screw 2 moving linearlies, and then the drive awl coils 4 moving linearlies; Under the effect of awl dish 4; The roller framework 7 that expands can make the roller framework 7 that expands open with respect to said cylinder 1 through said awl fan-shaped curved surface, and vice versa.

During use; Eight groups of rollers 9 that expand need form an extruding force that expands outwardly respectively to processed expansion tube inwall; And these eight extruding forces need be positioned on the same circle, therefore, need be positioned on the same circle with said cylinder 1 longitudinal center line vertical range point farthest on eight groups of roller 9 roll surfaces that expand; Simultaneously, relatively large for the contact area that makes each extruding force, the roller 9 that needs to expand is designed to diameter and is the bloated roller of the little gradual change type in both sides broad in the middle.

What need special instruction is in other embodiments, also can be three groups or four groups or five groups or the six groups roll structures that expand.

As shown in Figure 1, vertical fixing has gag lever post 10 on the outer wall of said cylinder 1, and said gag lever post 10 tops are fixed with limited cover 11; Said swing arm 6 is provided with perforation, and said perforation is made up of the spacing hole 12 on top and the bar hole 13 of bottom, and the aperture of said spacing hole 12 is greater than the aperture in said bar hole 13; Said gag lever post 10 passes said perforation setting, is equipped with back-moving spring 14 on the said gag lever post 10, and the port edge that is located at said limited cover 11 and said bar hole 13 is pushed up at said back-moving spring 14 two ends respectively; Under the effect of leading screw sleeve 5, said awl dish 4 moves along said leading screw 2, and then; Produce motion forward or backward between awl dish 4 and the bloated roller framework 7, at this moment, under the effect of back-moving spring 14, gag lever post 10 and limited cover 11; Can form position-limiting action to said swing arm 6; Simultaneously, also be beneficial to the matching relationship that satisfies between said awl dish 4 and the said bloated roller framework 7, can form reset response said swing arm 6.

Like Fig. 1, Fig. 3, Fig. 4 and shown in Figure 6; Said awl dish 4 comprises ring-type awl dish 15, is positioned at disk 16 and four ribs plate 17 that said ring-type awl coils 15 centers; Wherein, Said gusset 17 connects said ring-type awl dish 15 and said interior disk 16 respectively, between said ring-type awl dish 15 and the said interior disk 16 annular gap 18 is arranged; The front end barrel of said cylinder 1 offers four axial limiting grooves 19, and the leading section of said cylinder 1 is plugged in the said annular gap 18, and four said gussets 17 are separately positioned in four said axial limiting grooves 19; This structure Design makes four said gussets 17 respectively along four said axial limiting groove 19 moving linearlies, and then; The motion that can make awl dish 4 linearly, it has guide effect, simultaneously; Can prevent that awl dish 4 rotates under the effect of leading screw sleeve 5, it has position-limiting action.

Like Fig. 1, Fig. 5 and shown in Figure 7, said cylinder 1 end is provided with bail 20.

During use, tube expander is placed in rolled expansion tube one end, then; Spur said bail 20, tube expander is moved, in expansion tube under function of friction; Said bloated roller 9 rolls along the expansion tube inwall, and the expansion tube inwall is formed the extruding force that expands outwardly, and makes the tube wall of expansion tube open also rounded; Simultaneously, also can be stretching expansion tube; What need special instruction is when using tube expander, for circularity and the linearity that guarantees pipeline, after the angle of the circumferencial direction of adjustment tube expander in expansion tube, can repeatedly repeat aforesaid operations.

The expansion tube that adopts this tube expander to process, its quality is significantly increased, and deviation from circular from is less than 1.5mm; Straightness error is less than 3mm, through the expansion tube inwall after the extruding, because the effect of flow harden; Intensity is higher, is beneficial to the service life that has prolonged expansion tube.

Should be noted that at last: above embodiment is only in order to technical scheme of the present invention to be described but not to its restriction; Although with reference to preferred embodiment the present invention has been carried out detailed explanation, the those of ordinary skill in affiliated field is to be understood that: still can specific embodiments of the invention make amendment or the part technical characterictic is equal to replacement; And not breaking away from the spirit of technical scheme of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.

Claims

1. tube expander is characterized in that: it comprises that bloated roll structure, leading screw, center that cylinder, N group are distributed in said cylinder lateral surface have the awl dish and the leading screw sleeve of leading screw trepanning; Wherein, said bloated roll structure comprises the fixing bloated roller framework of swing arm, rearward end and said swing arm one end, is installed in the roll shaft on the wall of the said bloated roller framework left and right sides and is installed in the bloated roller on the said roll shaft through bearing; The said swing arm other end and said cylinder end are hinged, and said bloated roller framework is arranged on said cylinder leading section; Said leading screw the inner is fixed in the said cylinder, the axial centre line parallel of said leading screw and said cylinder, and said cylinder front end nozzle is stretched out in said leading screw outer end; Said awl dish is contained on the said leading screw through said screw set borehole jack, and said leading screw sleeve is installed on the said leading screw, and said awl dish is arranged between the bloated roller framework and said leading screw sleeve of the bloated roll structure of N group; The cylindrical side of said awl dish is a taper seat, and the bottom surface leading section of said bloated roller framework has the awl fan-shaped curved surface that cooperates with said taper seat, and the awl fan-shaped curved surface of the corresponding said bloated roller framework of the taper seat of said awl dish is provided with; N is not less than 3 natural number.

2. tube expander according to claim 1 is characterized in that: vertical fixing has gag lever post on the outer wall of said cylinder, and said gag lever post top is fixed with limited cover; Said swing arm is provided with perforation, and said perforation is made up of the spacing hole on top and the bar hole of bottom, and the aperture of said spacing hole is greater than the aperture in said bar hole; Said gag lever post passes said perforation setting, is equipped with back-moving spring on the said gag lever post, and the port edge that is located at said limited cover and said bar hole is pushed up at said back-moving spring two ends respectively.

3. tube expander according to claim 1 and 2; It is characterized in that: said awl dish comprises ring-type awl dish, is positioned at disk and four ribs plate that said ring-type is bored disk center; Wherein, Said gusset connects said ring-type awl dish and said interior disk respectively, between said ring-type awl dish and the said interior disk annular gap is arranged; The front end barrel of said cylinder offers four axial limiting grooves, and the leading section of said cylinder is plugged in the said annular gap, and four said gussets are separately positioned in four said axial limiting grooves.

4. tube expander according to claim 3 is characterized in that: the lateral surface of said cylinder is evenly distributed with eight groups of said bloated roll structures.

5. tube expander according to claim 3 is characterized in that: be positioned on the same circle with said cylinder longitudinal center line vertical range point farthest on the bloated roller roll surface of the bloated roll structure of N group, said bloated roller is that diameter is the bloated roller of the little gradual change type in both sides broad in the middle.

6. tube expander according to claim 3 is characterized in that: said cylinder end is provided with bail.