KR20010067907A - Apparatus and method for manufacturing multi-layer flanged cylindrical units of storage tank, and multi-layer flanged cylindrical units manufactured thereby - Google Patents

Abstract

PURPOSE: An apparatus and a method for manufacturing a multi-layer type cylindrical unit of a storage tank and the multi-layer type cylindrical unit manufactured thereby are provided to supply the integrated multi-layer type cylindrical unit having an excellent structural rigidity and relatively wide welded part, and a space for filling thermal insulation material. CONSTITUTION: An apparatus for manufacturing a multi-layer type cylindrical unit of a storage tank includes first, second, and third strip feeders(200,210,220) coupled with a lower structure body(100) for simultaneously rotating each turntable mounting a stainless strip coil, an insulating materials strip coil, and an iron strip coil by receiving power in first and third large electric motors(830,832) and first and second chain/gear connection parts installed inside the lower structure body, wherein the first, second, and third strip feeders respectively transfer each strip from the strip coils to a roller leveler(300).

Description

APPARATUS AND METHOD FOR MANUFACTURING MULTI-LAYER FLANGED CYLINDRICAL UNITS OF STORAGE TANK, AND MULTI-LAYER FLANGED CYLINDRICAL UNITS MANUFACTURED THEREBY}

The present invention relates to a multi-stage flanged cylindrical unit manufacturing apparatus and manufacturing method of the storage tank, and to a multi-stage flanged cylindrical unit manufactured by the same, in particular to reduce the production cost of the storage tank having a multi-stage cylindrical structure and make it semi-permanent, The present invention relates to an apparatus and method for manufacturing a multilayer flanged cylindrical unit of a storage tank for manufacturing a multilayer flanged cylindrical unit press-laminated by laminating a material, an insulating material, and a steel plate material, and a multilayer flanged cylindrical unit manufactured thereby.

In general, the cylindrical storage tank is for storing powder raw materials such as oil and cement, and living and factory water, and is configured to effectively support the internal pressure relatively than the rectangular storage tank.

Such cylindrical storage tanks are theoretically best manufactured with integral or minimal welds and have the best durability and water resistance. The cylindrical storage tank is a large cylindrical structure having a diameter of 5m to 20m. When simply bending and welding, the cylindrical storage tank should be welded with a relatively thick stainless steel plate and additionally reinforcing section steel for structural stability. This complicates the fabrication work and involves problems that are relatively inexpensive and difficult to mass-produce with the use of a relatively large amount of additional materials. In addition, it solves all of the manufacturing problems that cannot be manufactured efficiently in automated machines, the leaking airtight along the bolt construction line or the welding line, and transporting the finished or assembly parts to the place where they are actually installed. It must be practical.

The stainless steel plate cutting device according to the prior art is a device for manufacturing a plate, which is a main assembly of the aforementioned storage tanks, and cutting devices, bending devices, and bending devices used in general sheet metal work are used.

Here, the cutting device cuts the stainless steel sheet to the specifications necessary for the assembly of the storage tank. The plurality of plates thus cut are moved to the bending device by hand or by a predetermined conveying means, and have a curved shape having a predetermined circumference in the bending device again, and then the plates are overlapped and joined by the bending devices. Is formed.

Conventional cylindrical storage tanks on the market attempt to overcome only the leakage problems and transport problems due to welding, a number of plates that have been processed in a predetermined width by a general stainless plate cutting device, and the sealing rubber As a combination of members and bolts, the overlapping portions of the plates are drilled, and the bolts are coupled to the perforated holes to be assembled to have a cylindrical structure.

However, the existing cylindrical storage tanks are bolted while overlapping the plate pieces, which is very inefficient and very inconvenient in manufacturing, and due to the structural stress agglomerated in a number of bolted sites, leakage occurs after a certain time of use. It is easy to occur, providing irregular inner surface is formed moss, sediment, etc. in the overlapping portion and the bolted portion of the plate is generated a problem of cleanliness.

In addition, the conventional cylindrical storage tank has a structural surface connected to the bolt construction and the sculpture depending on the manual work, the uniform load does not work around the cylinder, the stress state is very unstable disadvantage.

In addition, almost the same problems are found in the manufacture of the existing rectangular storage tank, in particular, the rectangular storage tank is welded in a number of welded to have a lattice shape inside the storage tank in order to form a structure capable of supporting the cohesion of water With reinforcing pipes, it is difficult to keep the storage tanks used for a long time clean. That is, when assembling the existing cylindrical storage tank or rectangular storage tank with a plurality of plates, there is a disadvantage that the corrosion occurs in a relatively large number of welding seams or bolt construction lines, and thus the contents of the storage tank can not be kept clean There are disadvantages.

Therefore, as a result of a lot of efforts and research on the manufacturing method of semi-permanent storage tank excellent in manufacturability and productivity by implementing a cylindrical structure having a minimum weld seam on the integral body with excellent structural stability, Korean Patent Application No. 2001 -17648 has been filed.

The present invention relates to a device for manufacturing a flanged cylindrical unit having a cylindrical structure by continuously bending a vertically supplied stainless strip to prevent bending deformation, and then bending the strip in a bent state.

However, when the flanged cylindrical unit of the storage tank is manufactured, the use of an expensive stainless steel strip is inevitable because it requires excellent corrosion resistance and good weld toughness, and furthermore, it has a predetermined thickness (about 1 mm to 5 mm) for good structural rigidity. I needed a stainless strip. In other words, in terms of productivity and economics, the present invention has a disadvantage that the unit price is relatively high despite the advantages that can be used semi-permanently compared to low-cost fiber reinforced plastics (FRP) products and sheet molding compound (SMC) products.

In addition, a commercially available slab of nickel-sprayed commercially is attached to a plate member of either a stainless steel sheet or a titanium plate to manufacture a pack, a separator is placed between the packs, and the outer circumference of the pack is welded. Firstly, hot rolling is carried out at a temperature of 900 ° C. to 1100 ° C., second to hot rolling at a temperature of 800 ° C. or higher, and then post-heated at a temperature of 400 ° C. to 700 ° C. Composite plate-type clad steel sheet forming an insertion layer is sold, but has a disadvantage that it is difficult to be used as a general structural material because it is very expensive.

Therefore, the applicant has come up with the following invention which is excellent in economics through continued research.

An object of the present invention is to mount the three strip feeder vertically, the inner surface of the water contact is made of stainless steel, and the outer surface of the water does not contact is made of a low alloy steel sheet (structural steel sheet, steel strip, etc.) material This provides a highly economical, one-piece, high structural rigidity, provides a relatively large weld and a multi-flange flanged storage tank that can continuously manufacture cylindrical flanged units with space to fill insulation. It is to provide a cylindrical unit manufacturing apparatus.

Another object of the present invention is to provide a method for manufacturing a multilayer flanged cylindrical unit of a storage tank that can be economically mass-produced through a series of processes of passing a multilayer strip to devices arranged in a row using a PLC control panel. will be.

In addition, another object of the present invention is a stainless steel material to the water contact portion, as in the case of the reservoir tank, and other structural parts to be made of steel, economical and durable and equipped with water resistance and structural rigidity It is to provide a multilayer flanged cylindrical unit.

1 is a plan view for explaining the configuration of a multi-layered flange type cylindrical unit manufacturing apparatus of a storage tank according to an embodiment of the present invention,

Figure 2 is a front view for explaining the arrangement of the main parts of the multi-stage flange-type cylindrical unit manufacturing apparatus of the storage tank shown in FIG.

3a and 3b are enlarged side perspective views for explaining the strip feeders of the multilayer flanged cylindrical unit manufacturing apparatus of the storage tank shown in FIG.

4A and 4B are an enlarged plan view and a front view for explaining a deformation corrector of the apparatus for manufacturing a multilayer flanged cylindrical unit of the storage tank shown in FIG. 1;

5 is an enlarged perspective view for explaining a strip cutting machine of the multilayer flange type cylindrical unit manufacturing apparatus of the storage tank shown in FIG.

6 is an enlarged front view for explaining a flange bending machine of the multilayer flange type cylindrical unit manufacturing apparatus of the storage tank shown in FIG.

FIG. 7A is a side cross-sectional view arranged from the cross section cut along the line A-A to the cross section cut along the line G-G in order to explain the operation relationship of the flange bending machine shown in FIG.

Figure 7b is a side cross-sectional view for explaining the shape of the bending rollers that can be further mounted to the flange bending machine shown in Figure 6,

8A and 8B are an enlarged plan view and a side view for explaining a flange bending machine of the multilayer flange type cylindrical unit manufacturing apparatus of the storage tank shown in FIG.

9 is a block diagram illustrating a method for manufacturing a multilayer flanged cylindrical unit of a storage tank according to the present invention;

10 and 11 are perspective views for explaining the shape of the multi-layered flanged cylindrical units made by the multi-layered flanged cylindrical unit manufacturing apparatus of the storage tank according to the present invention.

<Description of the symbols for the main parts of the drawings>

100: substructure 110a, 110b, 110c: strip coil

111, 111 ', 111 ": Multi-layer strip 111a: Stainless steel strip

111b: insulation strip 111c: steel strip

112, 113: flange portion 120, 120 ': cylindrical unit

200, 210, 220: strip feeder 280: turntable

190, 290, 390, 590, 690: chain / gear connection 300: strain corrector

400: strip cutter 410, 411, 610, 611: actuator

440: length measuring instrument 460: hydraulic equipment

500: flange bending machine 600: flange bending part

830, 831, 832: large electric motors

An object of the present invention as described above includes a deformation corrector installed vertically on the upper surface of the substructure, a strip cutter, a flange bending machine, and a flange bending portion to manufacture a flanged cylindrical unit constituting a storage tank having a cylindrical structure. In the multi-stage flanged cylindrical unit manufacturing apparatus of a storage tank, each of the first and third large electric motors and the first and second chain / gear couplings installed in the undercarriage are supplied with power to mount strip coils. And further comprising first, second and third strip feeders coupled to the substructure to rotate the turntable simultaneously, the first, second and third strip feeders respectively from a stainless strip coil, an insulation strip coil and an iron strip coil. Multi-Flanged Cylindrical Unit Manufacturing Site for Storage Tanks, characterized in that each of the strips is transferred to a deformation corrector Is achieved by

In addition, another object of the present invention is to turn on the system after mounting the strip coils to the first, second and third strip feeders, respectively, unwinding each strip from the strip coils and transferring it to the deformation corrector, Rolling the strips with straightening rollers of the straightening straightener to form a multi-layer strip, bending both ends of the multi-layer strip to a flange bending machine to form upper and lower flanges, and converting the multi-layer strip to a measuring instrument. By measuring a cutting length, cutting with a strip cutter, and bending a multilayer strip having upper and lower flange portions with a flange bending machine by the method of manufacturing a multilayer flange type cylindrical unit of a storage tank. Is achieved.

Still another object of the present invention is to provide a multi-layered flange type cylindrical unit, wherein a strip of strip coils mounted on strip feeders is manufactured by sequentially passing through a deformation corrector, a strip cutter, a flange bending machine, and a flange bending section. Multi-layered flanged cylindrical unit, characterized in that the stainless steel strip portion is located on the inner side of the flanged cylindrical unit, the steel strip portion is located on the outer side, and the insulating strip portion is located between the stainless strip portion and the steel strip portion. Is achieved by.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

In the drawings, Figure 1 is a plan view for explaining the configuration of a multi-stage flange-type cylindrical unit manufacturing apparatus of a storage tank according to an embodiment of the present invention, Figure 2 is a multilayer flange-shaped cylindrical unit manufacturing of the storage tank shown in FIG. It is a front view for demonstrating the arrangement relationship of the principal part of an apparatus.

As shown in Figure 1 and Figure 2, the lower structure 100 of the multi-layered flange type cylindrical unit manufacturing apparatus of the storage tank of the present invention, respectively, three first, second, Third strip feeders 200, 210, and 220, a deformation corrector 300 supported by the first support beam 380, a strip cutter 400, and a second support beam 580, 581. Flange bending machine 500, flange bending machine 600, flange guide rollers 710 and 711, hinge shaft guide roller 720, and a plurality of roller guide guides 721, 722 and 723 are arranged.

In addition, triangular support bar type guide rollers 730 and 731 are positioned outside the substructure 100 so as to support a multi-layered flange-shaped cylindrical unit to be bent in a cylindrical shape.

In addition, the upper surface 102 of the lower structure 100 is fixed to the strip guide roller 340 that serves to collect the three types of strips in one place at the strip inlet portion of the deformation corrector (300). The strip guide roller 340 guides the various strips smoothly between the calibration rollers of the deformation corrector 300.

In addition, the present invention includes a power supply unit 820 connected to a PLC control panel (hereinafter referred to as a control panel) and an external factory power supply (not shown).

The present invention is to be operated by the control signal of the control panel 800 and the first, second, third large electric motors (830, 831, 832) installed in the interior and exterior of the lower structure 100, and the hydraulic equipment A facility for manufacturing a multi-layered flanged cylindrical unit (see FIGS. 10 and 11) by a worker using a semi-automatic or fully automatic operation.

First, the substructure 100 is a plurality of 'I'-shaped beams 101 arranged to have a'-'shape as a whole, a plurality of reinforcing bars (not shown) in the direction perpendicular to the longitudinal direction from the inside Doing. Here, the substructure 100 may be manufactured to have a 'T' shape or 'Y' shape to arrange the first, second, and third strip feeders 200, 210, and 220. .

Such an undercarriage 100 finishes the upper surface 102 and the lower surface 103 with steel plates of a predetermined thickness, and a plurality of lids on the upper surface 102 and 'I' detachable by bolting for maintenance. The magnetic beam 101 is formed on the side surface. Here, the plurality of equipment installed inside the substructure 100 includes a large hydraulic pump, a hydraulic installation including a hydraulic valve and hydraulic line 460, the first large electric motor 830, the third large electric Motors 832 and first to fifth chain / gear connections 190, 290, 390, 590, 690 made of gear and roller chain engagement.

Meanwhile, the first to fifth chain / gear connections 190, 290, 390, 590, and 690 are the first large electric motor 830, the second large electric motor 831, and the third large electric motor 832, respectively. Drive gears fixed to the rotating shaft of the driven gears and driven gears connected to the drive gears by roller chains, thereby reducing the driving force of the first to third large electric motors 830, 831 and 832 to a predetermined reduction ratio. Also, the rotational force is applied to the roller shafts of the strip feeders 200, 210, and 220, the deformation corrector 300, the flange bending machine 500, and the flange bending machine 600, which will be described in detail later with reference to FIGS. 3A and 3B. It is meant to be delivered.

In addition, the front of the lower structure 100 is attached to the box-shaped first and second sockets (871, 872) for connecting the power and control signals from the control panel 800. The first socket portion 871 is electrically connected to the first large electric motor 830 and the third large electric motor 832 that power the strip feeders 200, 210, and 220 and the deformation corrector 300. The second socket portion 872 is electrically connected to the second large electric motor 831 that provides power to the flange bending machine 500 and the flange bending machine 600.

In addition, the control panel 800 receives the power boosted by the power supply unit 820 to control the power supplied to the first to third large electric motors 830, 831, 832, connected to the hydraulic line to receive external hydraulic pressure The hydraulic system 460 is controlled, wherein the hydraulic pressure of the hydraulic system 460 is applied to the pair of first actuators 410 of the strip cutter 400 and to the pair of second actuators 610 of the flange bending machine 600. To be delivered to each. In addition, the control panel 800 includes a power lamp, a power switch, an automatic operation / automatic stop switch, an automatic / manual selection switch, a first actuator hydraulic ON / OFF switch of a strip cutter, and a second actuator hydraulic pressure of a flange bending machine. Operator-operated throughout the multi-stage flanged cylindrical unit manufacturing equipment in the storage tank, including on / off switches, strip cutter up / down switches, strain straightener roller forward / reverse switches, flange bending machine roller forward / reverse switches To control.

3A and 3B illustrate strip feeders 200, 210, and 220, and materials capable of preventing transition corrosion between stainless steel strip coils 110a made of stainless steel and stacked metal plates (stainless steel plates and iron plates), respectively. The insulating strip coil 110b and the low-strength steel strip coil 110c having a structural rigidity, respectively, are side perspective views showing the shape before and after the mounting.

Here, the stainless strip coil 110a is wound around a stainless strip 111a having a width of about 1 m to 2 m and a thickness of about 0.5 mm to 1 mm in a coil shape, and is a ferritic stainless steel commercially available from Pohang Steel in Korea. Steel (Product Name: STS444).

In addition, the insulating material strip coil 110b is a double-sided adhesive tape type, in which the insulating material strip 111b formed with a strip is formed in a coil shape between the upper and lower surfaces to which the adhesive is applied to prevent the transition corrosion. The insulator used here is a product obtained by mixing alumina (Al2O3: Aluminum Oxide) as a filler in epoxy resin and adding a hardener (Anhydride series) to cure the product. In addition, transition corrosion refers to a corrosion phenomenon caused by a transition difference between adjacent metals.

In addition, since the steel strip coil 110c is a general structural strip coil marketed as a low alloy steel sheet, its detailed description will be omitted, but the steel strip 111c having a thickness of about 2 mm may be used to cover structural rigidity. It is wound in shape.

Typically, the steel strip coil 110c and the stainless strip coil 110a are more than several tons by their own weight, and the weight of the insulation strip coil 110b is also considerable.

Therefore, the strip feeders 200, 210, and 220 have a circular cap shape made of a steel plate having a predetermined thickness so that the strip coils 110a, 110b, and 110c vertically support the strip coils 110a, 110b, and 110c. Have turntables 280, respectively.

In particular, a gear 212 is mounted on the lower rotating shaft 211 of the first strip feeder 200, which is coupled to the first chain / gear connecting portion 190 (see FIG. 2) to form a first large type. The rotation torque is transmitted from the electric motor 830. In addition, an upper portion of the lower rotation shaft 211 is vertically pierced through the upper surface 102 of the lower structure 100. The turntable 280 is fixed to the rotatable shaft 211 so that the turntable 280 can rotate simultaneously with the rotation shaft 211. The outer periphery of the turntable 280 is formed with a plurality of extension ends 222 protruding in a cross shape, the center of the turntable 280 is formed with a hub 221 protruding in the shape of a hat. The hub 221 is formed to have a diameter corresponding to the inner diameter of the strip coil 110a, and by the cone shape of the upper portion, the stainless strip coil 110a helps to correct the posture on the upper surface of the turntable 280. Gives. The shaft 221 of the hub 221 extends to have a predetermined height by the rotation shaft 221. The upper end of the rotation shaft 221 is a disk-shaped cover to fix the stainless strip coil 110a to the turntable 280 230 is screwed in. In addition, a plurality of identification holes 231 are formed in the disc-shaped cover 230, and a traction ring 232 is formed to protrude from the shaft center.

The second and third strip feeders 210 and 220 having a similar coupling relationship are combined with the second chain / gear connecting portion 290 (see FIG. 2) to receive a rotational torque force from the third large electric motor 832. And the first strip feeder 200 described above.

Meanwhile, the above-described strip feeders 200, 210, and 220 fix a plurality of safety bars 240, 250, 260, and 270 to the upper surface 102 of the substructure 100. Each of the safety bars 240, 250, 260, and 270 is a 'b' shaped cross-section steel plate, and rollers 241 and 261 are installed on the upper and lower portions of the inner surface, respectively, so that the strip coils 110a, 110b, When the 110c are simultaneously rotated by the respective turntables 280, the strip coils 110a, 110b and 110c support the lower and side portions so as to rotate smoothly while winning the weight of the strip coils 110a, 110b and 110c. Along with the role, the strip coils 110a, 110b, and 110c may be prevented from being abnormally loosened.

The strip feeders 200, 210, and 220 formed as described above may be rotated forward and reverse by a control panel, so that each of the strips 111a, 111b, and 111c may be unfolded from the strip coils 110a, 110b, and 110c. , To rewind the respective strip coils 110a, 110b, 110c. As such, the strip feeders 200, 210, and 220 serve to continuously transfer the stainless strip 111a, the insulation strip 111b, and the steel strip 111c to the deformation straightener at the same speed.

4A and 4B respectively show a plurality of strips that are slightly curved in a strip coil state as described above in detail, stacked in multiple layers and rolled, and thus the rolled straightener 300 continuously smoothes the rolled multilayer strips 111. ) Is a plan view and a front view.

The deformation corrector 300 is fixed to the upper surface of the substructure 100 in a direction coinciding with the transfer line of the multilayer strip 111. The deformation corrector 300 is provided with a lower plate 301 fixed to the upper surface 102 of the lower structure 100, and the upper plate 302 is provided with a control plate to adjust the play, the lower plate 301 and the upper plate ( A plurality of orthodontic rollers 310 and 320 standing vertically between the 302 is rotatably coupled to the third chain / gear connecting portion 390. Here, the deformation corrector 300 is vertically erected by bolting the upper plate 302 and the lower plate 301 with a plurality of support shafts 330.

These orthodontic rollers 310 and 320 are arranged in front of the front, and three in the rear, the front calibration roller 310 is relatively small in diameter, the rear calibration roller 320 is relatively It has a large diameter but the same rotational speed.

In particular, the front straightening rollers 310 form a plurality of stretch grooves 350 in the upper portion and the lower portion of the shaft to prevent the vertically conveyed multilayer strip 111 from slipping down.

In addition, the rear side calibration rollers 320 and the front side calibration rollers 310 are disposed while maintaining a distance slightly smaller than the thickness of the multilayer strip 111. Accordingly, the multilayer strip 111 is pressed while passing through the calibration rollers 310 and 320 and is flattened at the same time.

5 is an enlarged perspective view of a strip cutter 400 for cutting a multilayer strip that has passed through the deformation corrector as described above to a predetermined length.

The strip cutter 400 includes an iron structure 401 having both sides opened to the plate surface. The steel structure 401 has a traction ring 409 in the upper plane, and the lower bottom is bolted to the upper surface 102 of the lower structure described above. The bolted steel structure 401 is fixed in a direction corresponding to the width direction of the lower structure.

In addition, a pair of first actuators 410 and 411 are fixed to the top and bottom of the steel structure 401 in the horizontal direction. Here, the first actuators (410, 411) at the same time to move the piston shaft 415 in the axial direction (f), the hydraulic line (412, 413) and three-way pipe joint 414 and the release valve 416 Is provided to receive the hydraulic pressure from the hydraulic installation. In addition, the working blade 420 is fixed to the end of the piston shaft 415 of each of the first actuator (410, 411). In addition, the fixed blade 421 is erected vertically on the inner surface of the steel structure 401 on the opposite side of the working blade 420, and the multilayer strip having a thickness of about 1 mm to 5 mm with the working blade 420 by hydraulic pressure. It is positioned for cutting. In addition, the first blade movement distance measuring contact sensor 460 is fixed to the upper portion of the steel structure 401, the piston shaft 415 in accordance with the presence or absence of contact with the transducer 461 moving in the same way as the piston shaft 415 It detects the original position of and transmits the generated position signal to the control panel. In the same manner, a second blade movement distance measuring contact sensor (not shown) for transmitting a position signal generated by detecting a cutting position to the control panel is fixed to the upper portion of the steel structure 401 behind the working blade 420. In addition, at the end of the piston shaft 415, the working blade 420 is arranged inside the guide plate 430 bolted to both sides of the steel structure 401 is slidably coupled, cutting the working blade 420 The clearance adjustment plate 432 for adjusting the angle is disposed between the guide plate 430 and the operating blade 420 is coupled to the adjustment bolt 431 to be movable.

In addition, the inlet portion of the strip cutter 400 is a wheel length measuring device for measuring the length of the multi-layer strip when the multi-layer strip passes through the space 450 between the working blade 420 and the fixed blade 421 ( 440 is installed. The wheel length measuring instrument 440 measures the moving distance of the multilayer strip and transmits the measurement signal to the control panel. Thus, the strip cutter 400 controlled by the control panel can cut the multilayer strip that has passed through the deformation corrector by a preset distance.

FIG. 6 is an enlarged front view of a flange bending machine 500 for bending both ends of a multilayer strip having passed through a strip cutter as described above into a flange portion having a predetermined width.

As shown in FIG. 6, the flange bending machine 500 is fixed to the upper surface 102 of the substructure 100 in a direction coinciding with the transfer line of the multilayer strip 111 passing through the strip cutter. The flange bending machine 500 is fixed to the upper surface 102 of the lower structure 100, the lower plate 502 is provided with each of the first control plate to enable the clearance adjustment, and the second adjustment plate is provided to enable the clearance adjustment A top plate 501, the first to seventh bending rollers 510 to 570 standing vertically between the bottom plate 502 and the top plate 501 to be rotatable with the fourth chain / gear connecting portion 590. Combined. Here, the flange bending machine 500 is vertically erected by bolting the upper plate 501 and the lower plate 502 with a plurality of support shafts 504.

The first to seventh bending rollers 510 to 570 of the flange bending machine 500 are paired with two roller shafts, respectively, and the upper and lower flange portions in one side direction at both ends of the multilayer strip 111, respectively. Bend. At this time, the flange portions to be formed at both ends of the multilayer strip 111 are bent at a multi-step angle, and as a result, the bent angle becomes 90 ° or has a different angle size.

In FIG. 7A, a process of bending the multilayer strip 111 through the shapes of the first to seventh bending rollers 510, 511 to 570, and 571 illustrated in FIG. 6 will be described. As shown in FIG. 7A, the shapes of the first to seventh bending rollers 510, 511 to 570, and 571 may be confirmed through cross sections taken along the line A-A of FIG. 6 along the line G-G.

For example, the pair of first bending rollers 510 and 511 are rotatably coupled to the upper plate 501 and the lower plate 502, respectively, and have a roller shaft and a rear side of the front side (left side in the drawing). In the right side). Each roller shaft has roller header portions 512 and 513 that are symmetrical to each other at the top and the bottom thereof. Here, the roller header parts 512 and 513 are screwed to the threads of the upper and lower roller shafts of the first bending rollers 510 and 511, respectively. In addition, a double nut 514 is provided on the upper and lower threads of the roller shaft of the first bending rollers 510 and 511, and the roller header portions 512 are moved by moving the roller header portions 512 and 513 in the axial direction. 513, it is possible to adjust the clearance (h) between.

In addition, the roller header portion 512 of the outer first bending roller 510 has a squeezing surface inclined inwardly in the axial center similar to the cone shape, and the roller header portion 513 of the inner first bending roller 511. Similarly to the countersunk head, it has a compressed surface that is inclined outward from the axis. Therefore, when the multilayer strip 111 enters between the first bending rollers 510 and 511, the roller header portions 512 and 513 have a pressing surface inclined inward of the shaft center and a pressing surface inclined outward of the shaft center. The upper and lower flange portions 112 and 113 are each bent at an angle of 30 ° based on the body portion of the multilayer strip 111.

The second to seventh bending rollers 520, 521 to 570, and 571 having the same principle and structure as the multilayer strip 111 may be formed by the inclined pressing surfaces of the roller header parts 522, 523 to 572 and 573. The upper and lower flange portions 112 and 113 of the bend are bent stepwise, such as 45 °, 50 °, 55 °, 70 °, 89 °, 90 °.

On the other hand, the back roller shafts of the second bending roller 521 and the third bending roller 531 have one first auxiliary roller 525 and 535 for horizontally supporting the body of the multilayer strip 111, respectively. It is fixed. In addition, the upper and lower flange portions 112 and 113 are bent at an angle of 90 ° to the front roller shafts of the sixth bending roller 560 and the seventh bending roller 570, and the body portion of the multilayer strip 111 is in the width direction. Three second auxiliary rollers 565 are fixed to each other to prevent bending.

The present invention may further add bending rollers such as the eighth bending rollers 580, 581 shown in FIG. 7B in steps. That is, in order to mount the roller, the flange bending machine 500 may extend the lower plate 502 and the upper plate 501 in the longitudinal direction, respectively, to mount the eighth bending rollers 580 and 581. At this time, the front side roller header part 582 of the 8th bending rollers 580 and 581 has the crimping surface of 135 degrees, and the back side roller header part 583 has the crimping surface close to a right angle. When passing through other bending rollers such as the eighth bending rollers 580 and 581 in multiple stages, the upper and lower flange portions 112 and 113 of the multilayer strip 111 may be bent at an acute angle of 45 ° or 60 °. .

8A and 8B are respectively enlarged plan views of the flange bending machine 600 for bending the multilayer strip 111, which has passed through the flange bending machine to form the flange portion, into the multilayer flange-shaped cylindrical unit having a predetermined radius, as described above; Side view. The flange bending machine 600 is a square plate-shaped steel structure 601 which is erected perpendicularly to the upper surface 102 in the width direction of the lower structure 100, and is pressurized to be rotatably coupled to the upper and lower plates of the steel structure 601. The roller 620, the driving roller 630, the first bending roller 640, and the second bending roller 650 may be formed.

In addition, a pair of second actuators 610 and 611 which receive hydraulic pressure from the hydraulic installation is fixed to the upper and lower rear surfaces of the steel structure 601 to move the pressure roller 620 toward the driving roller 630. have. The ends of the piston shaft 612 of each of the second actuators 610 and 611 are engaged with the support parts 613 rotatably coupled to both ends of the pressure roller 620 to drive the pressure roller 620. 630). In particular, the pressure roller 620 and the driving roller 630, which is a rotary treatment, have a relatively large diameter and, although not shown, a fifth chain / gear connected to a second large electric motor installed inside the substructure 100. It is coupled to receive the rotational torque force by the connecting portion 690 (see FIG. 2). In addition, the fifth chain / gear connecting portion connected to the second large electric motor is configured to transmit the rotational torque force to the first bending roller 640 and the second bending roller 650 in the same manner.

In addition, through slits 631 and 632 are formed at upper and lower portions of the driving roller 630 in the circumferential direction, respectively. In addition, the first and second bending rollers 640 and 650 are disposed on the left and right sides of the driving roller 630, and the upper parts of the first and second bending rollers 640 and 650 are disposed. First and second bending slits 641 and second bending slits 651 and 652 are formed at positions corresponding to the through slits 631 and 632, respectively.

Here, the first bending slits 641 of the first bending roller 640 and the slits 631 and 632 of the driving roller 630 are formed on the upper part of the multi-layer strip 111 having a 'c' cross section, which comes in during the bending operation. By bending while keeping the lower flange portions 112 and 113 intact, it becomes a multi-layered strip 111 having a 'c' shaped cross section.

That is, the multi-layer strip 111 passes a gap between the driving roller 630 and the pressure roller 620, and comes in contact with the second bending roller 650 disposed in the direction in which the multi-layer strip 111 is bent. To bend. At this time, the second bending slits 651 and 652 of the second bending roller 650 accommodate the upper and lower flange portions 112 and 113 of the multilayer strip 111 to maintain a bent shape without twisting.

In addition, the first bending roller 640 may be provided with a pair of roller positioning levers 643 and a ball screw feed mechanism (not shown) to adjust the contact gap with the multilayer strips 111 and 111 '. . In the same principle, the second bending roller 650 also includes a pair of roller positioning levers 653 and 654 and a ball screw feed mechanism, and can control the pressing force applied to the multilayer strips 111 and 111 '. .

In addition, a bending goniometer 655 produced by a number of experiments is attached to the upper and lower portions of the steel structure 601 supporting the second bending roller 650. The bending goniometer 655 represents a proportional relationship between the displacement dimension of the roller and the size of the circumference.

That is, when the operator rotates the roller position adjusting levers 653 and 654 of the second bending roller 650 at the same time while looking at the bending angle meter 655, the position of the second bending roller 650 moves ( j), and thus the multilayer strip 111 " can be bent to have a larger or smaller circumferential ratio.

In addition, a hinge shaft guide roller 720 hinged to the flange bending machine 600 at the same speed and finite fan shape as the multilayer strips 111 'and 111 " that is bent is attached to the side of the substructure 100. The hinge shaft guide roller 720 is a support cantilever that is rotatable about a hinged fixed axis, and a rotatable roller 725 is coupled to an upper end of the hinge shaft guide roller 720. A chain 726 connecting 100 is coupled so as to hinge only at a finite angle.

In the following, a method for manufacturing a multilayer flanged cylindrical unit of a storage tank as described above will be described.

As shown in FIG. 9, the operator manipulates a hoist gear to raise and lower the load by the chain, mounting each strip coil to the appropriate strip feeders, and turning on the power switch of the control panel. In this case, the power lamp is on and the system enters a standby state (S10).

The operator then turns on the auto run / stop switch for manual operation, and on the auto / manual select switch. And when the operator operates the deformation straightener roller forward / reverse switch, the strip feeders and the deformation straightener rotate at a slow speed, for example a rotation speed of 0.1 m / s. Thus, three types of strips are guided by the workers towards the strain straightener as they slowly exit the angled strip feeder. At this time, the workers while holding the ends of the strips by hand to move together, inducing the ends of the strips to enter between the calibration rollers of the deformation corrector (S20).

The strips introduced between the straightening rollers are continuously rolled by the straightening rollers of the straightening roller and smoothly spread to form a multilayer strip (S30).

This multi-layer strip is continually advanced by the calibration rollers and is moved towards the strip cutter, where the wheel length measuring device installed at the inlet of the strip cutter is operated from the point of contact with the multi-layer strip and continuously moved. Measure the length. The multi-layer strip, on the other hand, is further advanced by the orthodontic rollers, penetrating the space between the working blade and the stationary blade of the strip cutter and entering the flange bending machine. The flange bending machine gradually bends both ends from the front of the multilayer strip to continuously form the upper and lower flange portions on the multilayer strip (S40).

At this time, if the distance value measured by the wheel length measuring device and the distance value measured directly on the multi-layer strip coincide, the signal of the match is sent to the control panel, and the control panel stops the strip feeders, the deformation corrector and the flange bending machine. Let's do it. In this case, the operator turns on the first actuator hydraulic ON / OFF switch of the strip cutter and presses the strip cutter up / down switch to operate the strip cutter, thus cutting the multilayer strip (S50).

When the operator operates the flange bending machine roller forward / reverse switch of the control panel and the second actuator hydraulic on / off switch of the flange bending machine, the flange bending machine is operated to form the upper and lower flange parts in the multilayer strip again, The multilayer strip is transferred to a flange bending machine. The bending rollers of the flange bending machine bend the entire multilayer strip while accommodating the upper and lower flange portions of the multi-layer strip of the 'c' cross section into the bending slits, so that the multilayer strip body portion and the upper and lower flange portions are twisted in the longitudinal direction of the strip. It is bent to have a predetermined circumference (S60).

The multi-layered strip of the 'c' cross section bent together with the flange portion to form a large cylindrical structure is a multilayer flanged cylindrical unit (120: see FIG. 10) having an inner surface of stainless steel and an outer surface of a low alloy steel sheet. Multi-layered flange type cylindrical unit 120 is a large cylindrical structure having a diameter of 5m to 20m in which the upper and lower flange portions 112 and 113 are integrally formed with minimum torsional deformation due to their own weight in the vertical state. The equipment is moved to the sheet metal workshop by the equipment (S70), and then the finishing sheet metal work is performed (S80).

In addition, when the operator turns on the automatic operation / automatic stop switch for automatic operation and the automatic selection switch on the automatic / manual selection switch, the strip coils are transferred in the order described above and manufactured step by step. Is omitted.

As shown in Figure 10, the multi-layered flanged cylindrical unit 120 is made by the manufacturing method of the present invention, it is possible to economically produce the storage tank while maintaining the same durability and corrosion resistance.

That is, the stainless steel strip 111a is located on the inner side of the multilayer flange cylindrical unit 120, and the steel strip 111c is located on the outer side, and the stainless strip 111a and the steel strip ( The portion of the insulating strip 111b is positioned between the portions 111c). Here, the stainless steel strip (111a) portion is relatively thin, which serves to lower the manufacturing cost, and the steel strip (111c) portion is a low-alloy steel material, so that the use of a relatively thick thickness and low production cost Play a sustainable role.

In particular, since the stainless strip 111a is located on the inner side of the multilayer flange-shaped cylindrical unit 120, it directly contacts the contents of a storage tank such as water. Product life can be maintained. In addition, the portion of the steel strip 111c is in direct contact with a heat insulator (not shown) which is filled at the time of manufacture of the storage tank, and is sealed with an aluminum iron plate (not shown) which is used at the finishing treatment, thereby substantially reducing moisture in the outside air. No contact.

The multilayer flange-like cylindrical unit 120 has the upper and lower flange portions 112 and 113 which are continuously bent in that state after bending both ends of the multilayer strip 111 'in one direction.

In addition, the multi-layered flanged cylindrical unit 120 cuts the cutting portions 114a to 114d at both ends with sheet metal scissors and the like in a finishing sheet metal working, and then, in a bending machine such as a folding / holding machine. Both ends 116a and 116b are bent outward along the bending lines 115a and 115b, thereby completing the assembly of the cylindrical storage tank.

As shown in FIG. 11, when the eighth bending roller is mounted on the flange bending machine of the present invention, the multilayer flange type in which the upper and lower flange portions 112 'and 113' of the multilayer strip 111 'form an acute angle. Cylindrical unit 120 'may be manufactured.

Then, the completed multilayer flanged cylindrical units (120, 120 ') are stacked in multiple stages having a predetermined height, and bending of the upper and lower flange portions (112, 113) inside the multilayer flanged cylindrical units (120, 120'). The parts are welded along the circumferential weld line bordering each other, and then the top cover and the bottom cover (not shown) are welded to form an industrial cylindrical storage tank.

Here, the welding between the bent portions where the upper and lower flange portions 112 and 113 border each other is stronger welding than butt welding or edge welding because the bending stress is applied and provides a relatively large welding area. Provide power.

In particular, in the case of a multi-layered flanged cylindrical unit 120 'having upper and lower flange portions 112' and 113 'formed at an acute angle, double welds are formed at the inside and outside of the bent portions bordering each other when the storage tank is manufactured. As a result, even stronger weld seams are provided.

As described above, the apparatus for manufacturing a multilayer flanged cylindrical unit of the storage tank according to the present invention is capable of mass production of the multilayered flanged cylindrical unit economically and continuously by linking a plurality of strip feeders with a plurality of facilities including a deformation corrector. There is an advantage.

In addition, the multilayer flanged cylindrical unit manufactured by the multilayer flanged cylindrical unit manufacturing apparatus of the storage tank of the present invention has a relatively thin thickness and forms the inner side with an expensive stainless steel strip, so that the contents of the storage tank with water are directly Corrosion is prevented at the time of contact, and the steel strip has a relatively thick thickness and has a relatively low product cost.

In addition, the multi-layered flange type cylindrical unit manufacturing apparatus of the storage tank of the present invention is to interpose the insulating strip to prevent the stainless steel strip and the steel strip is less durable due to the transition corrosion, it is possible to produce high quality products There is this.

In addition, since the apparatus for manufacturing a multi-layered flanged cylindrical unit of the storage tank according to the present invention is arranged in a row in a vertical arrangement of the devices performing each step function, to produce a multi-layered flanged cylindrical unit in a vertical state, accordingly Since the torsional deformation due to its own weight can be minimized, there is an advantage that a high quality product can be produced.

In addition, the apparatus for manufacturing a multilayer flange-type cylindrical unit of the storage tank according to the present invention has an integral cylindrical structure having no seam in the circumferential direction, and thus has an advantage of manufacturing a multilayer flange-type cylindrical unit having excellent sealing property.

In addition, the apparatus for manufacturing a multilayer flanged cylindrical unit of a storage tank according to the present invention is controlled by a control panel, thereby minimizing the number of workers, and by performing a series of operations sequentially, a highly efficient multilayer flanged cylindrical unit. There is an advantage that can be produced.

In addition, since the multilayer flanged cylindrical unit manufactured by the present invention is formed integrally with the bent upper flange portion and the lower flange, it has a relatively large structural rigidity compared to the cylindrical unit without the flange portion, relatively stainless steel It is very economical to use less material.

In addition, the multilayer flange-shaped cylindrical unit manufactured by the present invention, when manufacturing a cylindrical storage tank, by providing a relatively large welding area to the bent portion of the flange portion, it is possible to significantly increase the structural rigidity of the cylindrical storage tank itself It works.

In addition, the multilayer flanged cylindrical unit produced by the present invention has an integral structure, and has the additional advantage of having a beautiful appearance with minimal welding lines.

In addition, the multi-layered flange type cylindrical unit manufacturing apparatus of the storage tank according to the present invention by manufacturing a multi-layered flanged cylindrical unit that can position the heat insulating material used in the manufacturing of the storage tank for the reservoir tank between the bent upper and lower flange portions. After that, there is an additional advantage that can simplify the manufacturing process of the storage tank for the reservoir.

In addition, preferred embodiments of the present invention are disclosed for the purpose of illustration, those skilled in the art will be able to make various modifications, changes, additions, etc. within the spirit and scope of the present invention, such modifications and modifications belong to the scope of the claims You will have to look.

Claims (4)

Deformation straightener 300 is installed perpendicular to the upper surface 102 of the substructure 100, the strip cutter 400, the flange bending machine 500 to manufacture a flanged cylindrical unit constituting a cylindrical storage tank In the multi-layer flange type cylindrical unit manufacturing apparatus of the storage tank including a flange bending portion 600, First and third large electric motors 830 and 832 and first and second chain / gear connecting parts 190 and 290 installed in the substructure 100 are supplied with power, and the strip coil 110a, Further comprising first, second and third strip feeders 200, 210, 220 coupled to the substructure 100 to simultaneously rotate each turntable 280 equipped with 110b, 110c, The first, second, and third strip feeders 200, 210, and 220 are respectively strips 111a, 111b, and 111c from the stainless strip coil 110a, the insulation strip coil 110b, and the steel strip coil 110c. Multi-layer flange-type cylindrical unit manufacturing apparatus of the storage tank, characterized in that for transferring to the deformation corrector (300). In the method of manufacturing a multilayer flanged cylindrical unit constituting a cylindrical storage tank using strip coils wound on a plate, (S10) turning on the system after mounting the strip coils to the first, second and third strip feeders, respectively; Unwinding each strip from the strip coils and transferring them to a deformation corrector (S20); Forming a multi-layered strip by smoothly rolling the strips with the straightening rollers of the deformation corrector (S30); Forming both upper and lower flange portions by bending both ends of the multilayer strip with a flange bending machine (S40); Measuring the cutting length of the multilayer strip with a measuring instrument and cutting the strip with a strip cutter (S50); And bending (S60) the multilayer strip formed with the upper and lower flange portions with a flange bending machine (S60). The strips 111a, 111b, 111c of the strip coils 110a, 110b, 110c mounted to the strip feeders 200 are deformed straightener 300, a strip cutter 400, a flange bending machine 500, In the multilayer flange-shaped cylindrical unit manufactured by sequentially passing through the flange bending portion 600, The stainless steel strip 111a is located on the inner side of the multilayer flange cylindrical units 120 and 120 ', and the steel strip 111c is located on the outer side, and the stainless strip 111a and the steel strip ( 111c) Multi-layered flanged cylindrical unit, characterized in that the portion of the insulating strip 111b is located between the portions. The method of claim 3, The multilayer flange-shaped cylindrical unit (120 ') is a multi-layered, characterized in that forming the integral upper and lower flanges 112, 113 bent at an acute angle to allow double welding inside and outside the bent portion Flanged Cylindrical Units.