DE1963805A1 - Machine for the production of two-layer pipes by welding helically wound strips - Google Patents

Description

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ΖΕΙΛΕΝΤϋ, '- .. ί UYKEN

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19 December 1'j ^fi

VfJ ο no j uzn _f y, i nauKno-iijüledovabelükid P 30 168/2 i projnklno-Konstrukkorskij inabitut nicoGkogo maoinostrojenija

Uookau / UdCJGR

MACHINE TO THE ILH: ', BELLING FROM ZWPJI "^ iXJHTEN PIPES THROUGH WELDING Vüfl OCIIk /, UBENIiINIENAkTBJ Aüi? J5-.7ICKBMJEW TAPES

The invention relates to l «n: iohin * jn to get here of tubes, especially on! .iaaci .. ..ieu for making of two-layer pipes by welding helically wound strips.

The present iirfindunt: can be advantageous in the manufacture of two-layer pipes with a diameter ^? ri _t over 1200 mm can be used for high-pressure pipelines, the pipes of which are made of thin strips. The invention is core, but to the same extent in the manufacture of pipes.

Ö09848 / 1Ö51

For ^N-making, which consist of various metal strips or metal bands with different strength properties Eicon ·

At the moment there are machines for the production of two-layer pipes by welding helically to cwl disgusting toi Ribbons known. These machines have one behind the other

α arranged devices for preparing the strips for welding and rolling, which feed the strips to the shaping welding machine from which the finished two-layer pipe emerges. In this case, the rollers simultaneously feed both strips that are laid on top of one another (see, for example, rfe Framösische-Vatentschti No. 1197896 of class B, 21 (3, 1958).

Since the outer tape in the manufacture of two-layer; c; x tubes en should encompass the inner band, the feed speed of the outer band must be greater than that of the inner band. This / lid in the known machine by forcing it out

™ · Slipping of one band relative to the other or by erv / arr.-on one of the bands, namely the band for the outside of the pipe. It is understandable that performing these operations are associated with difficulties · The invention is based on the object of a machine

one

for the production of two-layer pipes to create the separate Feeding of the strips into the shaping welding machine with individual regulation of the Sintri ^ jttswlnkels each Tape ensures.

The problem posed is solved by the

009848/1051

Machine for the production of two-layer pipes, which contains devices arranged one behind the other for preparing the bands for welding as well as rollers which feed the bands to the form-casting welding machine from which the finished two-layer pipe emerges, according to the invention the rollers are combined into at least two groups, each of which has one Belts come in, the axes of rotation of the rollers in each group are horizontal, but the rollers of one group are mounted at an angle β to the rollers of the other group and the size of this angle is determined in degrees by the following formula;

β = aro 008 A _ hi, "Obel

B. - Width of the band forming the inner pipe layer in; B ₂ - width of the bands forming the outer tube layer in ι. D, - diameter of the inner pipe layer in mm, D - diameter of the outer pipe face in mm ^ Such a structural design allows the strips to be inserted into the forming welding machine separately and at different angles.

A group of rollers is expediently mounted in such a way that it can be rotated around the axis perpendicular to the longitudinal axis of the drilling in order to correct the angle Jh relative to the other group of rollers.

The rollers, which can be rotated around the vertical axis, can be turned into

009848/1051

a frame to be mounted, daa rigidly secured to the frame iat, of an electric drive to a stationary Sonkrechtachse is rotatable with the aid of which is perpendicular to the pipe axis. At the same time, the rollers are pressed against one another.

To better understand the invention, the following is provided

a specific embodiment of the same with reference

r
attached drawings considered; show it

Fig. 1 from the side betaahtete overall view of the machine according to the invention,

Fig _t 2 Scheme of the bonding arrangement in dor producing einos two-layer tube,

Fig. 5 side view of the feed rollers in an enlarged! Standards,

Fig. 4 the same scheme as in Fig. 2, but with relative -staggered tapes, and

Fig. 5 plan view of the machine according to the invention.

The machine for the production of two-layer pipes contains devices 1 and 2 arranged one behind the other (Fig.l) to prepare the strips 3 and 4 for welding and rolling 5i 6, 7 and 6, which are combined into two groups and feed the strips 3 and 4 to the shaping welding machine 9, from which the two-layer pipe emerges. The longitudinal axes of the rollers 5 ··· ΰ are horizontal, with

0098 ^ 8/1051

the rollers 7 and 8, which form one group, are arranged at an angle β (FIG. 2) to the rollers 5 and 6 which make up the other group. This angle depends on the. Band width and thickness as well as the pipe diameter. The size of the angle β in degrees is given by the formula

A = arc cos (B ₂ -%) determined, 'where B ^ - width of the band forming the inner pipe layer in mm, B ₂ - width of the band forming the outer pipe layer in mm, D, - diameter of the inner pipe layer in mm, Dg - diameter of the outer pipe layer; is in mm. The rollers 7 and 8 are mounted in the frame 10 (FIG. 3), which is rigidly attached to the frame 11, which can be rotated around the vertical axis 13 with the aid of an electric drive 14 on rollers 12. The axis 13 is immobile and is perpendicular to the longitudinal axis of the tube 15. The rollers 7 and 6 are pressed against one another with the aid of a bracket 16, one end of which is hinged to the frame IO and the other end of which is connected via pin 17 to the piston rod 18 of a hydraulic cylinder 19 is, the housing of which is fixed to the frame 10 · Behind the rollers 7 and 8 are in the running direction of the tape

u
(this direction is indicated by arrow A) stationary

one »

Guide rollers 20 are provided, the onfgemeinsaaen support body which is attached to the frame 10.

The above formula, which characterizes the dependence of the angle Jh on the strip width, thickness and pipe diameter, was established on the assumption that the

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. Angle β . d is equal to the difference between the angles »^ and oL _t (Fig, 2), where ⁰ ^ -, e / er angle between the edge of the

^ ^βΓ animal

Bands 4 and the longitudinal axis of the pipe 15um / «t _x ** '/ in; tGl zv.'LrxN.-a i-.nnüc

des uiiiiur; J and hu; r; aca. ■ ·. vu iiuiirr :. '\ y ir; υ.

To regulate the welding gap between the edge of the belt

3 and the.: - first turn of the pipe outer layer, angle ° L is corrected. This is done by rotating the frame 11 φ (FIG. 3) together with the rollers 7 and 8 around the vertical axis 13.

The strips 3 and 4 must be fed at different angles in order to ensure the same axial components of the strip feed speed when entering the shaping welding machine, which is one of the main conditions when shaping two-layer pipes .

The shaping welding machine 9 is mounted on a support plate 22 which rests on a frame 24 by means of rollers 25. . This frame is rotated around the vertical axis 13 with the aid of an electric drive 25.

The support plate 22 can be rotated together with the machine 9 by an electric drive 26 around the vertical axis 13, whereby the machine is given the required position, which depends on the diameter of the pipe produced and the width of the belts 3 and 4.

The position of the pipe 15 emerging from the machine 9 in relation to the frame 24 is determined by bevels 27 (Fig. 5) which are mounted on this frame.

The bottom gap between the edge of the tape 4 and 009848/1051 '-

BAD ORiGiNAu

dor the first winding of the inner pipe layer is regulated by changing the angle cC _{f (Fig.2).} This is done by rotating the frame 24 together with the tube 15 (FIG. 3) around the axis 13 or by rotating the frame 24 and the support plate 22 together with the shaping machine 9 around the axis 13.

The rollers 5 and 6 are mounted in a stationary frame 28 and are pressed against one another with the aid of the bracket 29. Sin end of this strap 1st hinged to the frame 28 while the other end by pin 30 to the piston rod 31 of a hydraulic cylinder 32 is connected, the housing of this cylinder is articulated on the frame 28th

Behind the rollers 5 and 6 are 4 in the running direction of the belt (This direction is conditionally indicated by arrow B) Guide rollers 33 are provided, which are mounted on a common support plate 34.

The bands 3 and 4 become the shaping welding machine fed, relative to each other by the Uaß "a", such as this can be seen from Fig. 4 and 5, are offset. this

a
is required to enable one-sided welding of both the inner and outer pipe layers on the adjacent layer without burning through.

one

Each of the devices 1 and 2 (Fig.l) contains unrolling device 35 for the federal government old the band 3 bcw. 4, straightening machine

009848/1051 _ ",.,

ßAD ORlGtNAL

36, scissors 37 for cutting the ribbons in the transverse direction, Butt welding machine 38 with burr remover, disc shears Hum calibration of the belt width and feed rollers 40. The machine is mounted on a foundation 41, the

has recesses 42 and 43 to allow the straps 3 to sag

and 4 to enable.

The slack of the band 3 in the recess 42 is

a

necessary to create a band reserve which is uninterrupted '. Chenen machine operation when butt welding the strip ends in the device 1 allows.

The slack of the band 4 in the recess 43 is required in order to create a band reserve, the uninterrupted machine operation when butt welding the band ends in

Device 2 allows. The second slack with constant length of the band 3 in the recess 43 enables the change the angle of entry these bands into the shaping welding machine, as the band can be tilted in this recess *

While the machine is in operation, the tapes previously wound into bundles pass devices 1 and 2, whereby they gradually wound up, straightened, cut off at the ends and butt-welded are calibrated as their width will. Then they get into the recesses 42 and

a

43 (Fig.l), where they sag and are therefore uninterrupted Machine operation when butt welding the strip ends into the Prepare devices 1 and 2 enable

009843/1051

BAD ORiGfNAL

The strips J> and 4 are pulled out of the depressions by rollers 5 · · 8, which they feed at different angles to the longitudinal axis of the tube 15 of the forming welding machine 9. This feeding of the tapes at different angles ensures the same axial components of the tape feed speed when the tapes are bent into sheets

Ii

different diameter during the shaping of the two-layer pipe ·

If bands 3 and 4 have curvilinear edges, the size of the welding gap can be set for both the inner and outer pipe layers · The welding gap is for the inner layer by rotating the frame 24 (Fig.3) together with tube 15 around the axis 13 or by common Turning this frame and the support plate 22 with the shaping welding machine 9 is set · The welding gap is adjusted for the outer layer by rotating the frame 11 together with the rollers 7 and 8

In the shaping welding machine 9 (Fig.l) are the Bands 3 and 4 are wound in a helical manner (as can be seen from FIG. 5) to form the cylindrical tube blank and at the same time, the spiral seams of the inner and outer pipe layers The inner layer is welded by apparatus 44 (Fig.l) at the point where the edge of the tape 4 meets that of the first inner layer turn, and the Outer layer through apparatus 45 at the point by half a

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BATH

Spiral winding is offset with respect to the weld of the inner layer, welded. The drilling emerging from the machine 9 can, without being stopped , be cut to measure lengths and conveyed on for subsequent processing.

00 9848/1051

Claims (3)

Λ QOQQ Π If- ι! γκ γμ I α Do OU Γ 30 168/2 - 11 - PATENT CLAIMS: (1st machine for the production of two-layer pipes by welding echraublinlenartlg coiled strips, which contains devices arranged one behind the other to prepare the strips for welding as well as rollers which feed the strips to the shaping welding machine from which the finished two-layer pipe emerges, characterized in that the rollers (5, 6, 7 and S) are combined into at least two groups, each of which feeds one of the belts (3 or 4), the axes of rotation of the rollers (5 · ..8) of each group being horizontal, but the folds (7 and 8) one group are mounted at an angle β to the rollers (5 and 6) of the other group and the size of this angle in degrees is determined by the following formula: λ & arc cos (~ * - ~ -), where B ₁ - Width of the band forming the inner pipe layer in mm, Bg - Width of the band forming the outer pipe layer in mm, D, - Diameter of the inner pipe layer in mm D "- Diameter of the outer pipe layer in mm t. 2. Machine according to claim 1, characterized in that a group of rollers (7 and Q) is mounted so that they for correcting the angle /? Relative to the other group of rollers (5 and 6) around the to the longitudinal axis of the tube ( Iß) vertical axis (15) can be rotated. 3. Machine according to claim 2, characterized in that 009848/1051 BATH shows that the rollers (7 and 6) rotatable about the vertical axis (1?) are mounted in the frame (10) because it is rigidly attached to the frame (11) which, with the help of the electric drive (14), is rotated around the stationary vertical axis ( 13) which is perpendicular to the longitudinal axis of the tube (15) can be rotated , the rollers (7 and 8) being pressed against one another, 0C9EU / 1051