DE2023190A1 - Process for winding up strand material, device for carrying out the process and winding of strand material - Google Patents

Description

. It is sometimes required several hundred feet of steel tubing large diameter to wind up, x ^ elchcm tube beforehand a curvature must be taught so that it maintains the winding shape. The usual winding methods satisfy not, because there is no pre-bending for them; therefore such a coil can only keep its shape, if he is constantly forced to do so by strong external forces. For steel pipes such as those used for main gas lines are used, it is useful, for example,

. start from a winding with the smallest possible diameter to be able to, which facilitates the transport, but on which a pipe length as large as possible is accommodated so that

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the number of connections when making long lines is as low as possible; Such an angle should be easy to handle, especially when the pipe is in the field is handled.

Wrap the general, also based on this description lying shape. have been manufactured as it is, for example, in the USA patents 2,723,807 CSiblcy) and 337 15U (Smith Jr. et al.) is indicated. After both Patenton becomes the material to be wound up during winding bent, to which either the winding spool or the material that has already been wound contribute. Before winding it up the material is not bent. ■ -

This known method can be used for very flexible material, such as for soft copper or for other material with very little Elasticity be useful. But it cannot be used for steel and similar materials, because steel must be bent beforehand if it is to retain the shape of the coil »Even if the yield point of the material is too could be exceeded, by being forced into the winding form according to the teaching of the patents given above, the force to be expended would be so great that the material would collapse if it were in the form of a tube.

US Pat. No. 1,871,665 (Dallas) describes a winding machine in which strip-shaped material is bent before winding and when the The radius of curvature becomes gradually larger «But it won't Teaching for the production of turns with a constant radius of curvature or for coils from several lagons given.

U.S. Patent 3,195,338 (Bram | describes a

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Device for the continuous winding of wire, with layers of individual windings progressing upwards
and the last layer is always the reason
forms a winding. Building a multilayer
Winding with several turns per layer from bottom to bottom
above is not described.

The winding to be produced by the method to be described here and with the associated device has the
Shape of a flat spiral pipe coil stacked in the axial direction, also known as Radialagc, and each %

Radial position consists of a spiral made up of several concentric turns and 1-icgcndcn turns in one plane. The radial bearings are layered one on top of the other in the axial direction
and partially offset from one another.

To produce the winding, a strand of material, such as a strand in the form of tubes, is used when bending

_{Form bchalten f} fed at a constant speed to a bending station consisting of at least two pairs of guide rollers and a bending roller. The bending roller is controlled by an electrical and hydraulic control circuit, so that the tubes running tangentially in front of it under- ^

can get different bending radii.

In one embodiment, the flex roll flexes that much
Material with a constant radius of curvature that a complete winding turn can be produced. Then the radius of curvature is gradually changed in the sense that the newly created turn either hcrumgclegt straight around the previously produced turn or placed in it
can be. Then the bending radius is kept constant for the duration of the production of a complete turn and then changed again at the same speed, but in a sense that corresponds to the sense of change of the previous one.

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going racius change is opposite. The first 'v'indun "· with a constant radius and the various immediately following turns with an obstructing radius lead to the formation of the first radius; the next turn with a constant radius and the various immediately following turns with a changing radius lead to the formation dci ⁿ zv.'citen radial bearings etc.

It is assumed that by keeping the 3icf-ungcrac'ius constant during the production of a turn in a layer, an additional piece of tubing can be built into the layer, whereby the total length of the tubing can be increased for a winding of given dimensions. It is also assumed that the constant bend radius facilitates the "nesting" of the turns.

On the other hand, a single radial position can also be achieved by including turns with a changing radius be formed in turns with a constant radius. For example, the bending roller can be used during manufacture two complete turns are held, so that in the finished winding each radial position an inner and an outer turn with different but constant radius of curvature and at least one intermediate turn has a changing radius of curvature.

After all, the bending roller can always go back and forth move forward and not remain stationary so that no turn has a constant radius of curvature.

The coil can be of a number of radially extending ones

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Support rollers carried and looking up from below be, with the straight bent tube on top of the Stützv / alzcn but under the one immediately before wound radial position runs. The nickel can also be from be built up and down, with the straight bent Tube on top of the one wrapped immediately before Radial position runs. Otherwise the wrap can be wound in any direction.

In the terrain, the pimple is stretched again by guiding the tubes through fixedly attached Str-eckr , - LLcn, which the radius of curvature or the diegunrr like Jar - ™

remove. The roll is located on a rro: rj.ul _J that is set up in the field, and a free end of the wound material can be guided through a guide fixed in the vicinity of the axial edge of the roll and then through the stretching rollers. Then the free end is pulled forward and the unwinding process begins. The radial layers separate from one another under the action of the guide, and if only a few radial layers are left, the rest of the winding begins in the direction of the guide or, if no guide is provided is to slide in the * direction to the level of the stretching rollers. It is not necessary to use the M

WickeItromißcl in the axial direction when unwinding the material to move.

The advantage of this winding and unwinding device is in that the coil is a practically self-contained structure because of the preliminary bending process, and the like can be easily stretched and unwound in the field.

Fig. 1 is a plan view of an inventive front

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direction with a bending station and an im Structure located, supported Röhrcnlagc.

Fig. 2 gives a side view of the unwinding device and stretching the material;

Fig. 2a shows, partly in section, the device for unwinding and stretching according to Fig. 2, seen in the direction of the arrows 2a,

Fig. 3 shows the bending station in detail in FIG Top view;

Fig. 4 is a front view, partly in section, from the bending station, viewed in the direction of arrows 4-4 in Fig. 3;

Fig. 5 shows, partly in section, a side view of details of the bending station, seen in the direction of arrows 5-5 in Fig. 3;

Fig. 6 is a section through an overlying roll, seen in the direction of arrows 6-6 in Fig. 1;

Fig. 7 is a section through an overlying roll, viewed in the direction of arrows 7-7 in Fig. 1;

Fig. 8 shows, partially in section, a view of a VJicke 1ϊ with a modified form of the support device!

9 shows a circuit diagram for the electrical structure belonging to the bending station;

10 i3t a schematic representation of the bending,

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station associated hydraulic and electrical Contraption.

The invention for winding and unwinding any string-shaped Materials, such as tubes, RundstSber., Wire, rails, can be used. For the sake of simplicity, however, the following will only speak of tubes, which are up or down, whereby it is assumed, any other strand-like material to the same

chen method or within the scope of the invention ™ Procedure can be subjected.

The one after the. The process to be described and the coils to be produced with the random device consist of a tubular lung that is joined together. The coil consists of a number of flat spiral tubes, one on top of the other. Each spiral tube layer represents a spiral made up of several concentric and in one plane lying. Rchrwindungcn. The flat RiShrenlagcn are referred to as radial layers. In Fig. 1, a single radial bearing, which consists of the '. • / indungen 20a, 20b, 20c and 20d can be seen. This winding is on Stützwalzcn so that it rotates Wehrend sides (t nor manufacture.

Every turn within a radial position is different from the other ir. radius of curvature. During production, a radial position can either be with the innermost turn, i.e. with the winding with the smallest radius of curvature, or with the outermost winding, i.e. with the winding with with the largest radius of curvature, or with an intermediate turn. Below is a wrap, which begins with a turn forming an end, for example with the Sus- 'sersten turn, can be described.

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It is assumed that a radial bearing with the The first turn is started (20a in FIG. 1). A straight piece of tubing a length equal to the circumference of the face The turn 20a corresponds to, is bent to the required, e.g. constant, radius of curvature. Here is It should be noted that the curvature imparted to the tube by the Bending apparatus must be taught, generally some of the eventually resulting curvature of the coil deviates because the elasticity of the pipe material tries to stretch the coil a little after the bending force has been removed.

Because of this difference, in the description, "bending radius" is understood to mean the radius of curvature, meaning your the tube is bent, while the "radius of curvature" of a turn is intended to mean the radius of curvature that the turn after it has had the opportunity to stretch a little after the bending force has been removed.

In making the coil, a piece of material is generally, but not necessarily, taken from under one constant bending radius bent to a circular turn, which is the outermost turn 20a of the in Fig. 1 recognizable Forms radial position. The bending radius is then gradually reduced in such a way that the subsequent turn 20b is just enclosed by the outermost turn 20a. The bending radius is gradually wrestled further, so that the next following turn 20e is just enclosed by the previously produced turn 20b, and the turn 20d made afterwards is just from 20c enclosed.

Then the bending radius becomes constant during the production of the next complete turn following 20d held. At the end of the turn denoted by 20b and at the beginning of the next turn there is thus a

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Transition: cine radial position is: completed and the,

Formation of the next radial position is started. The pipe piece, that forms the innermost turn 20d of the completed radial position, now becomes the tube that has the innermost turn 22d (FIG. 7) represents a second radial position which arise either above or below the first position can. (below in Fig. 7). It is true that the one described here works Example of a radial position with four turns, but of course you can choose between the innermost and the outermost Turn of a radial layer any number of intermediate turns be provided.

In the second position, as can be seen in FIG. 7, the innermost turn 22d initially has a constant bending radius produced, then a further turn 22c is formed with a bending radius increasing in such a way that this Turn just encloses the innermost turn 22d, then a next turn 22b, which is just the one previously produced Turn 22c encloses, and then a turn 22a »which just encloses 22b. After the turn 22a is completed, the bending radius is kept constant, and there is another transition from the pipe section, which forms the outermost turn 22a of the second layer the pipe section used for the outermost turn 23a of a third layer; the turn 23a is with €

constant bending radius ".

The procedure described can be continued as long as until the winding has obtained the desired dimensions, Fig. It can be seen that the winding is built up from the bottom has been; he would have made in the top-down direction as well, or in any other direction can be. With a different cross-section, however, the turns can be in a position immediately above the corresponding Turns of the adjacent lower radial position and

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immediately below the corresponding turns of the adjacent higher radial position. A complete Nesting is not possible because zv / ei adjacent layers, one is actually a left-hand spiral and the other a right-hand spiral and therefore overcutting of the turns must occur. But since the radial layers shift slightly under the weight of the coil, there is a certain nesting of the turns of a layer with respect to the turns of the neighboring layers.

In connection with the winding described above is it has been said that constant radius bending can be used to make coils (outer coils and inner coils) to achieve a constant radius of curvature. The use of a constant bending radius is at the outermost and innermost turns desirable because it is believed that thereby the Pipeline length that is specified within a winding layer Dimensions can be accommodated, compared to a layer of the same dimensions is to be increased in which the bending radius is continuously changed. It is But of course it is also possible to produce a coil in which the bending radius changes constantly (e.g. increases and then suddenly decreases, then suddenly increases and so on), so that the radius of curvature changes continuously within the turns of all Isgen.

The bending and winding device is in its essentials Parts in Fig. 1 shown, 'where one was introduced from the left See pipe string 20 entering a bending station. ·

The raw strand can be from a conventional plant to • - 10 -

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places are supplied by tubes in which a flat steel band is bent into a long cylinder, the free Edges are welded together and the Schv / ciss seam partially scraped off to make a smooth circular cross-section to achieve. The pipe string comes out of such a system at a constant speed.

Because the pipe string just made by a pushing force is driven in the direction of the bending station 21, the stability of the tubular column is generally sufficient, to push the strand through the bending station. Should · " If the strand strength is insufficient in certain cases, a suitable (not shown) Provide auxiliary drive at or near the bending station 21.

The bending station 21 has the task of bending the pipe string 20 in a suitable bending radius in order to be able to produce the coil described above. In particular, the bending station 21 nut, the lengths of pipe bend so that can be prepared within a Radiallagc several turns with different radii, one of which is constant at least while the ■ a remaining change gradually during bending of the pipe lengths for certain turns. In addition, the bending radii can also change continuously.

After leaving the bending station, the tube that has just been bent runs under a support roller 85, which is designed as a cylinder that can rotate freely about a horizontal axis; thereafter the pipe 20 runs over support rollers 89, 90, 86, 87 and 88 mounted in a similar manner. The pipe 20 then runs over the roller 85. The most clearly recognizable in Figs. 3, H and 5

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bare bending station 21 consists of a permanently attached heavy base plate 28 on which an intermediate plate 29 is pivotably arranged. The pivot point is in place a shaft UO, which is passed through the base plate 28 and in a (not shown) rigid holder is recorded. The intermediate plate 29 is used to pivot a threaded bolt 30, one end of which is rotatably connected to a spindle 301 which is on the top of the intermediate plate 29 is attached; the threaded shaft of the bolt 30 runs through a bore in the upwardly directed one .Legs of an L-shaped carrier 31, the horizontal lying leg on the base plate 28 is fixed. There are nuts 32 and 33 on both sides of the carrier 31 screwed onto the shaft of the threaded bolt 30.

By loosening one of the two nuts 32 or 33 and When the other is tightened, the intermediate plate 29 can be pivoted about the shaft UO. The pivoting of the intermediate plate is used to give the bending station an initial setting type, the tubes of different diameters and different elasticity is adapted «After this initial setting the intermediate plate 29 changes its position relative to the base plate 28 in general during the Production process no longer as long as the properties of the flat steel strip used for the tubular manufacture remain practically unchanged.

There are also two pairs of guide rollers on the base plate 28: a pair is made of rollers 34 and 35. formed, the other pair of rollers 36 and 37 «Die Rollers lie in one plane and have circumferential grooves, which have a continuous tangential passage for. form the pipe string 20. For tubes of different diameters or different shapes, different Guide rollers are used. Any leadership role lc

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can rotate freely on a pivot supported by a Holder according to the type of holder 38 (Fig, 4) added is. A lower flange 381 is provided on each bracket 38, which engages in guide rails 39 and is perpendicular can be moved to the feed direction of the pipe string 20, so that pipes of different diameters can be processed.

In FIG. 4 it can be seen that the shaft 40 penetrates the base plate 28 and extends upward through the intermediate plate 29; immediately above the intermediate plate, the shaft is surrounded by a sleeve 41 that sits loosely on the shaft - ä 40. A horizontal pivot arm 42 extends from the sleeve 41, on which a cylinder 43 with a vertical cylinder axis extends downward and an upwardly extending shaft 44 is provided in the direction of the axis of the cylinder 43.

On the shaft 40 there is also a sleeve 45 which corresponds to the sleeve 41, but is arranged above this sleeve. On the sleeve 45, a cross arm 451 is attached _t the partially along the swing arm 42 extends. The arm can be fixed in various positions relative to the pivot arm 42 by means of a screw 46 which is screwed into a threaded hole in the sleeve 45 and whose head lies on the other side of a curved slot 47 cut in the pivot arm 42. The center of curvature of the slot 47 lies in the VJ ≤ 40. The arm 451 extending from the bushing 45 has a recess 48 which tangentially catches and directs the free end of the pipe string 20 when it first appears in the feed direction.

The shaft 44 carries above the swivel arm; 42 a bending roll 43, which with a tight fit freely on the shaft 44

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runs, the roller ^ 9 has a circumferential groove that the corresponds to the leadership roles. For ^ pipe strings of different Large bending rolls can be used according to different sizes,

From the cylinder located below the pivot arm 42 43, as can best be seen in FIG. 5, is a tongue 50 to which an upwardly directed pin 51 is attached. A cam feeler wheel 52 runs with a tight fit free on the spindle 51 un.

The circumference of the cam sensor 52 lies in the plane of the uniformly beveled side of a horizontal, wedge-shaped straight cam plate 53 which is fastened on a cold block 5U. The cold block SM is firmly attached to its tips on a guide plate 55. The guide plate 55 can be displaced between guide rails 56 in the direction of advance of the pipe string 20. The guide rails are attached to the intermediate plate 29.

In order to be able to move the cam plate 53, the guide plate is used 55 connected to a rod 57 running parallel to the guide rails 56, the other end of which to a piston movable in a working cylinder 5β connected. The cylinder 58 is designed as a double-acting cylinder of conventional design and can be Pistons, and thus the guide plate SS and the cam plate 53, in both directions parallel to the guide 56 move. '

The cylinder 58 is fastened to the intermediate plate 29 with brackets SS, holding blocks BO and screws 61. In the ends of the cylinder 58, two hydraulic ducts, only indicated in FIG. 13 and 75, - '

On the intermediate plate 29 are also electrical end

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switch 62 or, 63 attached, the swivel arms 64 or 65, each of which has a

Nockon button wheel freely rotatable on a standard bracket 641 wear. The arms 64 and 65 are preloaded by springs so that the switches are open in the rest position are. However, if the cam plate 53 is in a wheel position on its path, one of the arms 64 or 65 becomes so moved from the situation under stress, that the circuit influenced by its switch is closed; the switch arm is moved by means of a vertically standing, mounted on the cam plate 53 switching strip 66, which a Hockentastcrräd 641 bc- | stirs.

The movement of the working cylinder 58 and thus the movement the squat plate 53, which has the bending radius through Pivoting the bending roller 49 is changed by the in 9 and 10 electrical schematics shown and hydraulic circuits controlled.

Fig. 10 primarily shows the hydraulic controls. All components provided there with reference symbols are designed in the usual way} they are therefore only Scheraatically indicated. The arrow 67 indicates a supply line for working fluid, which is connected to an over- ™ borrowed source of pressurized hydraulic fluid is connected5 the pressure is sufficient to drive the piston to move in the working cylinder S8. The arrow 58 indicates the drain line for the hydraulic fluid through anj the line flows the hydraulic fluid into a reservoir at a lower pressure.

The incoming liquid enters a standard four-way valve 69 with two outlet lines 70 and 71 for the working fluid. Those arriving through line 67

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tcndc liquid can optionally be in cine of the pipes 68, 70 and 71 can be controlled.

The line 70 leads to a usual volume control and Check valve 72, which is used in one direction, an unimpeded, a certain pressure exceeding To achieve flow to move a hydraulic piston and a partial flow in the opposite direction for venting a hydraulic cylinder. A line leads from the outlet of the check valve 72 73 in "the left side of the working cylinder 58. The line 71 leads to a similar Rucksd & agventil 7 ^, its Outlet via line 75 to the right end of the working cylinder 58 is connected.

Solenoid 76 and 77 are operatively connected to the four-way valve 69. When both solenoids 76 and 77 are not energized are, the four-way valve 69 directs the incoming liquid directly into the drain line 68 and there is no differential pressure on the piston located in the working cylinder 58. If the solenoid 76 is energized, so the four-way valve 69 directs the over the line 67 incoming liquid into the line 71, and finally the liquid reaches the right side of the working cylinder 58 acts on the one located therein Piston and causes the piston rod 57 to move outward. The liquid exits the cylinder 58 through the Line 73, valve 72 and lines 70, 68 connected by valve 69. When solenoid 77 is energized, thus valve 69 "connects lines 67 and 70 and the working fluid reaches." the left side of the cylinder 58 and guides the piston located therein and the piston rod 57 in the sense of a

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Eimpart shubs. The liquid flows out through the pipe 75, valve 74 and those connected by valve 69 Lines 71, 67.

The one in FIG. 9 is used to control the Solenoi.de 76 and 77 schematically shown electrical circuit in the, switches 62 and 63 correspond to the limit switches of FIG. 3; the solenoids 76 and 77 agree with the corresponding Parts in Fig. 10 coincide.

9 also shows two normal relays. A relay has a field winding 78 and contacts 78-1, 78-2 and 78-1T ™ on; the second relay has eirtc field winding 7 and 9 Contacts 79-1, 79-2A, 79-23 and 79-1T. The relays work in their structure exactly with one another, and with each relay with current-free winding there are those with the index designated contacts are open and the contacts designated with the index 2 are closed. When the windings are excited the contacts marked with the index 1 are closed and the contacts marked with the index 2 are closed opened. Contacts 78-1T and 79-IT are time-controlled Contacts; the contacts 78-iT t ^ ground after a certain time interval after energizing the winding closed, and they are 'at the same time as switching off Jj of the excitation current for this winding open; the Contacts 79-IT are activated after a certain time interval after energizing the winding? 9, and they are closed at the same time as the energizing current is turned off open for this winding.

The circuit of Fig. 9 is connected to a suitable power source, e.g. connected to 110 volts alternating current; it a main switch 80 is provided, as well as an additional start switch 81 »The circuit works as follows:

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The main switch 80 v / crde closed when the limit switch 62 and 63 are open. The start switch 81 is briefly closed by hand, and current flows through the normally closed contacts 79-2A and 78-2 and the winding 79. The Winding 79 is energized and contacts 79-1 become closed while contacts 79-2A are opened. The winding 79 remains excited via the now closed contacts 79-1 and the normally closed contacts 78-2.

With the energization of the winding 79, the delay interval of the timed contact 79-IT begins. After a predetermined delay time v / ground the time-controlled Contacts 79-IT closed and solenoid 77 energized. When solenoid 77 is energized, it becomes working fluid led to the left side of the working cylinder 58, and The piston rod 57 begins, the cam plate 53 after right CFig. 10 and 3) to move. The piston rod moves continuously, as can be seen from Fig. 3, until the switching strip 66 meets the arm 65 of the limit switch 63 touches and pivots, whereby the limit switch 63 is closed and the relay winding 78 energized waö.

As a result of the energization of the relay coil 78, the contacts 78-1 are closed and the contacts 78-2 are opened. By opening the contacts 78-2, the current flowing through the relay winding 79 is switched off, which in turn opens the contacts 79-IT, the solenoid is switched off and the inward stroke of the piston rod 57 is ended. 1 with the contacts 79-2B now closed at the same time, a current - "w.3f" is produced in parallel with the switch 63, which means that current flows through the Pclaiawiekiung 78 regardless of the position of the switch 63. The solenoid 76 will carry the delay time of the * timed Kontalte 78-lT not yet excited » At this moment © atstölt

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no differential pressure in the working cylinder 58, and the the piston located in it does not change its position.

After the predetermined delay interval has elapsed contacts 78-IT closed so that now the solenoid is excited. This means that working fluid can flow into the right Reach the side of the working cylinder 58, and the squat plate 53 begins its outward movement from the working cylinder 58 away. The cam plate 53 moves steadily on until the switching strip 66 reaches the arm 61 of the limit switch 62 touches and pivots. This causes the limit switch | 62 closed, and by closing the switch the relay winding 79 is energized, which then makes the contacts 79-2B are opened, with the result that the the relay winding 78 is switched off current flowing through will. The winding 79 remains energized through the contacts 79-1 and 78-2.

Then the loop winding 78 is de-energized, causing the contacts 78-1 and 78-1T can be opened and removed Solenoid 76 is de-energized. The two solenoids 76 and 76 are de-energized again; the cam plate 53 remains in their position entirely for the duration of the predetermined period Deceleration rate of contacts 79-1T. When the delay- ™ time has elapsed, the solenoid 77 is energized and the cam plate 53 begins its inward movement against the Working cylinder 58.

The inward and outward movement of the cam 53 continues in the manner described above as long as the main switch 80 remains closed.

The support mechanism for the roll is shown in FIGS. 1, 6 and 7, in which two fixed supports 82 and 82 are drawn, which are in the axis of the finished roll

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cross at right angles; the beams are held together by a structure indicated generally at 84. At each represent two carriers 82 and 83 are mounted three cylindrical Stützwalzcn, two each at the one "carrier end and one located at the other end. An dcnTräger 82, the bending station 21 nächstgclcgencn end a support roller 85 on the while two Stiltzwalzen 86 and 8 7 are located at the other end of the beam, the beam 83 having a backup roll 88 at the end closer to the bending station 21 and backup rolls 89 and 90 at the other end.

All backup rollers rotate freely around their cylinder axes and are received in holders 91, the lower ends of which rest on a carrier. Other holders 92 are used for rotatable mounting of the support rollers 86 and 87 and the support rollers 89 and 90. Set in the horizontal section the holder 91 is shown as an outwardly facing U-iron sectionc. On each of the holder 91 is inside in the U-profile a vertical roller 91a mounted freely rotatable; this prevents the roll from sliding off the support rollers.

FIGS. 6 and 7 show clearly that the backup rolls -in different horizontal planes lie. The roller 85 rests on; The highest and the next lowest height is the roller 88, the rollers 86 and 87 are at a common, again slightly lower height, and rollers 89 and 90 are lowest, also in a common plane. The support rollers support the radial position of the tubular strand, which was bent immediately beforehand, because the coil is going up during its manufacture pushed.

8 shows a different type of support

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nit a basket 93, which is the first on its bottom takes up produced radial position of the tubular strand. Lockable wheel supports are located on the underside of the basket 93 94 arranged, of which only two pieces are drawn. The wheel supports 94 rest on a flat Circular disk 95, at the bottom of which a small concentric ring 96 is attached.

The ring 96 rests on a roller bearing 96a carried by an upper flange 97 of a strong shaft 98, so that the plate 95 can rotate when the curved | Pipe string is deposited in the basket 93. The wave 98 extends from the piston of a strong recessed working cylinder 99 upwards. A cup-shaped depression 100, the diameter of which is slightly larger than that of the plate 95, is cut into the base 101 so that the plate 9 5 can be received when this under the action of the working cylinder 99 to the Floor is guided. The top of the plate 95 is then flush with the bottom surface 101, and the basket 93 can open the wheel supports 94 after they are unlocked, rolled away.

An example will now be used to manufacture a winding ™ described from three radial positions.

The pipe string 20 is fed to the bending station 21. The free end of the pipe string is passed between the opposing guide rollers 34 and 35 and then between the guide rollers 36 and 37. Then the free end of the pipe string 20 contacts the groove 48 the arm 4SI recognizable in FIG. 4 is tangential and runs then tangential in the Urafangsnut of the bending roller 49 a »

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It is assumed that the two solenoids are antregt 76 "and 77, and the cam plate 53 nearest the straight position to the working cylinder has reached 58 and the contacts 78 Zoitversögcrungsintervall the timed-IT has just begun _-..;.

BoL unexcited solenoids 76 and 77, there is no differential pressure at the one located in the working cylinder 58 Piston, and the Mockcnplattc 53 remains immobile. Will the pipe string 20 passed the bending roller U 9, so it is bent with a constant bending radius. The intermediate plate 29 was around the shaft UO by means of a screw 30 and nuts 32 and 33 have been pivoted so that the bending radius in this position of the cam plate 53 3 To produce the curvature of the outermost turn of the to be produced winding is suitable. . . ■

The pipe string 20 accordingly runs tangentially along the bending ^{roller l} f9 and is bent with a constant bending radius as long as is necessary when the length required for the outermost winding turn 20a has to be bent. This time interval is defined by the predetermined time delay of the timed contacts 78-1T. -. . .

When the free end of the tubing string 20 is back off the bending roller 49 removed, it initially runs under the Support roller 85 hand in hand. When reaching the support roller 89 the free pipe edge runs over the rollers and in in the same way over the back-up rolls 90, 86, 87 and If the free end of the pipe string 20 again reaches the support roller 85, as runs over the roller ^ and in the same way · the pipe end rises with each successive one Winding circulation,, over the back-up roll 85. Bas un>

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the pipe end coming indirectly from the bending station 21 runs, but always under the backup roller 85 away.

As soon as the delay interval of contacts 78-IT has expired is, the turn 20a (Fig. 1, 6 and 7) is completed, and the solenoid 76 is energized. Now there will be an even flow of liquid into the right Side of the work cylinder 58 directed, and the cam plate 53 begins to move outwardly away from the ram 58 at a steady rate and thereby begins to change the bending radius. the Inclination of the cam plate 53 and its speed of movement are chosen so that the change in the bending radius leads to a change in the radius of curvature of the final turn as required to complete each turn of the To be able to fit radial position into the inside of the turn of this radial position produced immediately before. For pipe strings of different diameters and made of different materials, different cam plates to be used.

When the first turn 20d of the first radial lay completed is, the switching strip 66 touches the limit switch 62, closes it and thereby de-excites the Solcnoidc 76, causing the outward movement of the cam plate 53 is terminated. The delay interval of the timed contacts 79-IT is described in the above Way initiated. The time delay of the.contacts 79-IT is set in such a way that a complete turn is produced with a constant bending radius.

At the time of the beginning of the period with a constant bending radius (ie the beginning of the delay interval) there is a transition from the first radial position to the second

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0 0 9 8 4 7/1320

EAD ORIGINAL

JrS-7748

Radiallagc instead.

The turn 20d of the first radial position is constantly with produced decreasing bending radius and it lies in the previously produced turn 20c, as described above, but the next turn, i.e. turn 2 2d, is bent with the same bending radius and can be do not insert into the winding 2Od. Since the pipe string for the formation of the turn 2 2d emerges from under the support roller 8 5 and cannot fit inside the turn 20d, · he pushes the turn 20d upwards and lies down under her, shifting it a little towards the center of the wrap is. In this way, the second radial position is started by doing that for the production of the turn 22d certain pipe runs under the first radial position by pushing it upwards.

As soon as the delay interval of the timed contacts 79-1T has expired, the solenoid 77 is energized and the cam plate 53 begins to move inwardly Direction of the working cylinder 58 and thus gradually and uniformly reduces the bending radius. The second Padiallage is further built up by the pipe string 20 running out from under the support roller 85, which is inserted between the first radial position · and rollers 89 and 90 are pushed. During the first radial position, the sweetest turn was built up inwards to the innermost turn, the second radial layer is based on the innermost turn built outside.

The second layer is produced during the period of time before the contact between the switching strip 66 and the limit switch 63. After the winding 22a has been completed, the solenoid 77 is then switched off ₉ and the movement of the cam plate 53 stops. Now the supply begins

- 24 - 009-847 / 1320

BAD OS = IlGfNAL

JFS-7748

Interval of contact 78-IT, and the cam plate remains stand during the time it takes to produce a complete winding turn (23a) is sufficient.

About or exactly at the point in time at which the manufacture of the turn with a constant radius is started Another transition takes place, namely the transition from the second radial position to the third radial position.

When the turn 23a is started, it can not go around the previously made winding 22a run around. The radius of curvature of the turn 23a does not increase because of the bending radius for the turn 23a is kept constant, therefore the now bent pipe piece for the turn 23a is pushed under the turn 22a and slightly outwards, as can be seen from FIG. 7 can be found.

When the predetermined Versögerungsintervall dos timed contact 78-lT has expired (completion of the winding 23a) is, represents solenoid 76 aries energized _s and the Nockcnplattc 5 3 starts the Aufwärtsbovsgung of the working cylinder 58 vies * This starting Z is the formation of the third Radiallafje from one"; Rohrscrang, under the Stüt ^ walao 8 S and between the awoita position and the f> tut sw al son 89 and 90 is pushed ₃ uki to produce the turns 23b ₃ 23c and 23d »

The specified process is repeated until the required Number Radial-agöii -hcrgastellt is

In the described v7ickel procedure, it is-in. every Rad'iallar; a a turn with the same curve as you ^ eradius ^ and the other turns xwr-äan with uniformly abbreviated odor uniformly sunöhmsndcm bending radius horses madt " But it is also possible to harzustalisn, indesa in the wrap

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009847/1320.

BADORiGSNAL

JFS-77U8

both the outermost as well as the innermost turn of each radial position ir.it consistent but different Radii are established and there is an intermediate turn either with decreasing or with increasing bending radii is formed. This modified manufacturing wcisc l ".?, T by biosscs setting the delay times Achieve contacts 73-iT and 79-1T of Figure 9; the back plate 51 must stand still so long in each end position that two (or more) complete turns are executed can be.

In addition, the time-controlled contacts 7P.-1T and 79-1T also set to delay Hull, or o: j Can relays be used without timed contacts' cnccr ;; the cam plate 5 3 then moves back and forth and stops in none of its end positions, DenÜabci entstehor.de V / i disgust then consists of turns, all of which have changing radius of curvature.

Dia iiockonnlatta can also be a non-linear guide curve so that the bending radius is changed non-linearly.

^: , 'on;i' -1.Lc, shown in Fig. 3, modified support structure is used, the only result is that the wrap is from top to bottom instead of in front. down to obon is made. When the bent piece of pipe leaves the egg roll ^L J9, it first runs out to the bottom of the basket 93, which at this moment stands directly below the horizontal plane of the bending roll ^l f3. With the continuous formation of radial positions, the basket 9 3 is drained further downwards according to the pressure controlled in the working cylinder 09 by conventional means.

flat completion of the forced 'number of?. ^ <iia. '.lagcr. confused ^1st

_ 25 - 009047 / U2Ü COPY

BAD OR- ¹ Gi

The top der'Tragscheibe 95 accommodated in the level of Bodeniliichc 101 ^1, and the basket 93 is moved away to its wheel supports 94 for further processing of the reel.

It should be noted that when building a coil of bottom up (with each layer below the immediately previously ccbildctc location runs) the piece of material that is from the Bending station comes, takes a large part of the total weight of the current roll, because the roll during, its manufacture is raised. On the other hand, when making a roll, go from top to bottom (where each layer runs over the layer formed immediately before) it is not necessary to lift the roll. Hence takes. with this method of production only each turn of the coil the weight of the turns above. Hence can grnsncro. Wrap better from top to bottom than from below upwards. The advantage of making a bottom-up roll is that no substantial space needs to be taken up under the bending station. On some occasions it is under the bending station no space, which results in the need to build the winding from bottom to top.

According to the invention, steel pipes have been wound up. Z.3. are 2 3/8 "(60.3 mm) diameter coils of steel tubing and 0.072 "(1.83 mn wall thickness been. Coils of approximately 700 feet (213 m) coiled length of tubing have been formed in one piece. Rolls with about 10 radial layers were wound from bottom to top, i.e. every newly formed layer was wound brought under the immediately previously established position. The one placed in a single layer of a roll Pipe length depended on whether the position was a turn with a constant bending radius on the outside or inside in the position exhibited. If the turns had a constant radius of curvature on the inside of the roll, the layers contained a smaller pipe length per layer compared to the layers

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JFS-7740

which the turn with a constant radius of curvature on the outside of the wrap. In this way produced wraps were wrapped with cardboard and Tied up with about three ties.

After a roll has been produced as described above, it can be treated further, for example with plastic coated, examined for strength and uniformity, wrapped, etc.

If the coiled tube is to be used, for example When laying a gas pipeline, the pipe string must be stretched by removing the curvature of each turn. In the other case, the unwound pipe string would snap back into its coiled form.

One embodiment of a device for stretching wound coils Pipe string is in the. Fig. 2 and 2a shown.

Fig. 2 shows part of a road vehicle 102, such as a conventional pipelayer, with a plow 103 on its rear end. The plow 103 is slidably mounted and can be raised to accommodate the. Floor surface too clean, or lowered to plow at a suitable depth; the constructions required for this are made known in pipe laying technology. Two parallel to each other standing girders 1OU, of which only one is drawn, are attached to the plow so as to be pivotable about a shaft 105 and protrude against it at an angle between 30 and 45 ° the horizontal from the plow to the rear. A removable drum 106 is freely rotatable on one of the supports Shaft 1061 attached; those perpendicular to the beams 104 runs and is held in openings in the carriers.

Two working cylinders 107 (only one of which is drawn

-28 -Q09847./1320

""bath

JFS-7748 -. ■

is) each extend from the lower portion of the carrier 104 to a support frame 108 on the vehicle 102. The cylinders 107 are double-acting devices and can raise and lower the carriers 10H and drum 106 using conventional hydraulic controls. The drum · 106 carries a coil 109 made according to the teachings of the invention.

Fig. 2a shows that an arm 110 extends from the free end of one beam 104 to the other beam 10H, and a shaft 111, which at its free end carries a guide roller 112 with a circumferential groove, extends from the free end of the arm 110 in the direction of the drum axis 106.

The frde end of the coiled tubing is between the carrier 104 (Fig. 2a) and the guide roller 112 tangen * tial to the groove of the roller 112 so that the tube lays in the groove of the guide roller. Then the free end runs between the opposing guide rollers 113 and 114 through, passes the grooves of the guide rollers 115 and 116 and passes through the passage between the stretching. rollers 117, 118 and 119. The guide rollers 113 to 116 and the stretch rollers 117, 118 and 119 are in the plow 103 rotatably mounted.

The free end of the pipe strand is longitudinal over its path of the guide rollers pulled by a rope 120 and a suitable gripping device 121. The stretch rollers 117, 118 and. 119 are arranged in a triangular pattern, which practically eliminates the curvature of the pipe string drawn through it. the Stretching roller 119 can be arranged so that it is in vertical direction and can be set at any point, so that different predetermined stretching forces can be exercised on the pipe string. -

When the tubing string is removed from the

009847/1320

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JFS-7748

The winding is unwound, there will be '// indungen and radial bubbles removed from the wrap. The remaining radial bearings tend to separate from one another because of axial pull which results from the guide roller 112 helping the turn which is being stretched. if if only a few radial layers are left in the roll, the entire roll can slide in the direction of the roll 112 kick off. There is therefore no need to move the drum 106 in the axial direction at any moment.

The guide roller 112 can also be omitted, and one of the free ends of the reel 109 can be used directly to the guide rollers 113, im, 115 and 116 and from are passed there to the stretching rollers 117, 118 and 119.

BATH ORIGINAL

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009847/1310

Claims (1)

JFS-7748 May 12, 1970 Claims; 1.! Method of winding strand-like material, ^ ■ "" characterized by the following steps: Ca) bending a coherent strand of material with a variable bending radius until at least one turn is completed, and (b) then bending one with the strand out Step (a) continuous strand of material with a constant bending radius. 2. The method according to claim 1, characterized in that the constant Bicgoradius in step Cb) as well is as large as the last value of the variable bending radius after step Ca). Method according to Claim 1 or 2, characterized in that, in step Ca), a first complete Turn with a constant bending radius and then at least one second turn is made, which lies in the same plane as the first turn, adjoins it and forms a radial layer with it. 4. The method according to claim 4, characterized in that the turn produced in step Cb) with a constant, deviating from the radius of the second turn- - ³¹ - 009847/1320 ORIGINAL BATHROOM JFS-7748 the radius is formed. S ₁ method according to claim U, characterized in that, in a further step, a subsequent strand of material is bent with a bending radius that changes linearly over time at the same speed but in the opposite direction as with the second turn until at least one more complete turn in the same plane as in the case of the turn produced in step (b), after which it is produced. 6. The method according to any one of claims 1 to 5, characterized in that that with each bending step a plurality of turns lying in one plane is produced « 7. The method according to claim 6, characterized in that the plurality of turns produced in step (a) form a first radial position which lies in a practically horizontal plane, and that the majority in one Coils lying flat, which are produced in the subsequent bending steps, with additional radial layers practically the same diameter as the first radial position, below or above the first radial position, form. 8. The method according to claim 7, characterized in that the turns of at least one of the other radial positions - 32 - 009847 / 13-2 ~ (feAD ORIGINAL JFS-7.748 be made with a bending radius that is in one sense "that changes the sense of change of the first Radial position is opposite. 9 * Method according to claim 7 or 8, characterized in that the radii of curvature produced one after the other Turns around at least the largest dimension of the material in the winding plane. 10, device for winding continuously fed strand-like material, characterized by (a) a device for bending the fed material under given bending radii and (b) a control that alternates the radius under that the bending device bends the material while predetermined Holds time periods constant and changed during predetermined time periods. 11. The device according to claim 10, characterized in that that the bending device consists of: (a) a device that puts the material fed on it takes a fixed path, (b) a device that produces the supplied material deflects its trajectory when it leaves the device forcing a fixed trajectory and Cc) a device that sets the deflection device in different positions compared to the one Track forcing device moves. - 33 - 0008 47/1320 JFS-7748. 12. Apparatus according to claim 10 or 11, characterized in that that the cine established path enforces Device consists of: Ca) at least two opposing leadership roles (34 .... 37), which form a passage for the supplied material (20), and that (b) the deflector comprises a bending roller (49). 13. The device according to claim 12, characterized in that that Ca) the deflector has a reciprocating cam (53) and that (b) a device is provided which enables the movement of the cam (53) is converted into a movement of the bending roller (49) with respect to the guide sleeves (34. »» * 37). 14. The device according to claim 13, characterized in that that a working cylinder (58) is provided with a piston, and that a piston rod (57) with the piston the cam (53), thereby causing a reciprocating movement of the piston under the action of fluid pressure to reciprocate the cam (53) leads. 15. The device according to claim 14, characterized by (a) Means that make the cam (53) slidable absorb and means that the working cylinder (50) ^{- 3U} "009847/1320 ORIGINAL BATHROOM t> ^■■: ■■■■ ■■■■■■■ ■■■■■■■■■■■■ -:. ■ "-. JFS-7748 3s hold immovably, and Cb) Means that oppose the brackets according to section Ca) move the bending roller. 16. Device according to one of claims 10 to 15, characterized characterized in that the control comprises the following elements. Ca) means which move the piston of the working cylinder C58) in one direction at a predetermined speed during a first predetermined time interval,
Cb) means which then open the piston during a second predetermined time intervals shut down Cc) means, then the piston during a third predetermined time intervals in the same manner as during the first predetermined time intervals ^s un at the same speed, but move in the opposite direction, and Cd) means then the flask over a stop the fourth predetermined time interval. 17. Device according to one of claims 10 to 15, characterized characterized in that the control system comprises the following elements: Ca) Means the bending device (21) to change cause the bending radius to change at a predetermined rate, Cb) Means for stopping the means according to Section Ca) during predetermined periods of time, whereby the bending device (21) is caused to bend during the predetermined time periods with constant - 35 -009847/1 320 ■ ORIGINAL BATHROOM JFS-7748 make the bending radii. 18. Winding from a coherent strand of material, marked by a plurality of axially stacked radial layers (20, 22, 23), each radial layer consisting of consists of a plurality of turns lying in one plane and each turn in each radial position with each immediately adjacent turn of this Rädiallagc and also each turn before winding is bent into an arc with a radius of curvature that corresponds to the radius of curvature of the turn in question able to match. 19. Winding according to claim 18, characterized in that the Material length required for one of the turns, pre-bent to a constant radius of curvature is. 20. Winding according to claim 18 or 19, characterized in that the material length _9, which is required for a different turn, is pre-bent to a non-constant radius of curvature 21. Winding according to one of claims 18 to 20, characterized in that within a radial layer the material length which is required for an innermost or an outermost turn is predetermined for a constant radius of curvature . ν m 36 ™ 009SA7 / 1320 '-' BATH ORIGINAL JFS-7748 22, roll according to one of claims 18 to 20, characterized
. characterized in that within a radial position the
Material lengths that are required for the innermost and the outermost turns on different, but
constant radii of curvature are pre-bent. 23. Wrap according to one of claims 18 to 22, characterized in that in each case two axially adjacent ä located radial plies are pre-bent in such a manner, the two windings which merge into one another, the Efess
one on a constant, the other on
is pre-bent to a non-constant radius of curvature. 24. Winding according to one of claims 18 to 23, characterized in that the innermost or the outermost turn of each radial position, except for the end positions, is practical
between the adjacent, depending on the must or
innermost turns of the two ¹ * adjacent radial layers is nested. 25. Roll according to one of claims 18 to 24 for enlarging the pipe string length that can be removed when used in the field, identified by a coherent strand of steel pipe or the like, which runs around an axis in layers combined Windings is arranged, with the layers stacked axially and the windings in each layer as a result arranged by whorls, and with the strand on - 37 - 009847/1320 _{BÄD 0R! EINÄL} JFS-7748 ^V - It Another position is only at the outermost or innermost one Turn each layer passes and has a preformed radius of curvature, which corresponds to the Changes shape of the turn under which the respective strand section appears, whereby the strand from a fixed axial position can be deducted if this roll is arranged approximately horizontally with its axis * is net, and allows the turns to diverge in the axial direction as a result of the preforming. BAD ORlGfNAL ₃₈ _ 009847/1320