CN109366099B

CN109366099B - method for manufacturing special-shaped spiral body

Info

Publication number: CN109366099B
Application number: CN201811275973.0A
Authority: CN
Inventors: 徐天祥; 夏春; 剪元香; 郑运洪; 许列操
Original assignee: China First Metallurgical Group Co Ltd
Current assignee: China First Metallurgical Group Co Ltd
Priority date: 2018-10-30
Filing date: 2018-10-30
Publication date: 2019-12-10
Anticipated expiration: 2038-10-30
Also published as: CN109366099A

Abstract

the invention relates to a method for manufacturing a special-shaped spiral body, which comprises the following steps: 1. splicing a steel plate according to the external dimension of the circular tube body projected by the spiral body, drawing an equal dividing line on the steel plate, and drawing a basic dimension line of the spiral body on the equal dividing line according to the lofting dimension; the drawn part needs to be turned over and inserted into a pipe coiling machine downwards to be coiled; 2. carrying out ovality detection, correction and reinforcement on the rolled circular pipe body according to the external dimension of the spiral body; 3. performing sectional lofting and rolling on the spiral vertical plate according to the size line of the spiral body; 4. aligning the spiral vertical plate to a dimension line on the round pipe body, and welding; and cutting the spiral panel blank to obtain a spiral panel, welding the spiral panel with the spiral vertical plate piece by piece, and then cutting the uncut spot-remaining part according to the dimension line of the spiral body to finish the manufacturing of the spiral body. The invention takes the circular tube projected by the spiral body as the conjoined prototype of the spiral bottom plate, and the whole circular tube is convenient to detect and correct and is convenient to use devices such as a tire rotating platform to assist construction.

Description

Method for manufacturing special-shaped spiral body

Technical Field

The invention relates to the technical field of construction of complex steel structures, in particular to a method for manufacturing a special-shaped spiral body.

Background

With the continuous development of the process steel structure, a plurality of model designs of the profiled spiral gate with the process steel structure appear, as shown in fig. 1-2, the profiled spiral gate is troublesome in profiled positioning, blanking, rolling and manufacturing, has high precision requirement, and needs to be spliced into various models according to the requirement. The following disadvantages exist in the actual construction:

(1) The existing manufacturing method is to set out the spiral bottom plate, the spiral vertical plate and the spiral panel of the special-shaped spiral body one by one, discharge, roll, assemble and weld, and finally carry out overall assembly, so that the construction process is time-consuming and labor-consuming, the processing difficulty is high, and the overall dimension is difficult to guarantee.

(2) in the correction of the ovality of the through long pipe wall of the large-sized pipeline, one point of the pipeline is corrected, adjacent points can be gradually changed, the pipe diameter in the vertical direction is increased, the horizontal pipe diameter can be correspondingly changed, the pipe diameter needs to be corrected in real time, then tracking detection is carried out, and then correction is carried out. The matching degree of the existing detection mode and the real-time correction is not high, the detection and correction alternation flexibility cannot be met, and the correction basis cannot be provided for the pipe wall correction in real time.

(3) The pipeline ovality detection device and the correction device are arranged on the same axis and are mutually influenced, so that the detection result error is large, and the central deviation and the radius of a pipeline in construction are difficult to control; the radiation type strutting arrangement of complete set is difficult for the equipment in horizontal pipeline, and adopts the eyelidretractor to propping inside the pipeline, adjusts the pipeline diameter, then welds bearing structure temporarily, prevents that the pipe wall from kick-backing, causes a large amount of materials extravagant to and increase the artifical consumption that the cutting of inner wall welding point was polished.

(4) In the pipeline manufacturing construction, the pipeline girth welding conventionally adopts the rotation welding, namely the pipeline is arranged on the rotary tire, and the rotary tire rotates to drive the pipeline to rotate, so that the automatic displacement is realized in the welding production process, the manual operation intensity is reduced, and the production efficiency and the welding quality are improved. A plurality of rotary tires are usually combined for use and need to be placed on one axis, and the space and the height of each rotary tire are adjusted according to the size of a pipeline. And some construction sites are narrow, and planes with height differences cannot be utilized.

In view of this, it is desirable to provide a method and a device for manufacturing a special-shaped spiral body, which meet the requirements of detection, correction and installation of a high-low difference plane rotary tire, improve the manufacturing efficiency, ensure the manufacturing accuracy, reduce the difficulty of operation labor, and reduce the construction cost.

Disclosure of Invention

The invention aims to solve the technical problems that in the prior art, a spiral bottom plate, a spiral vertical plate and a spiral panel of a special-shaped spiral body are sequentially lofted, blanked, rolled, assembled and welded, and finally integrally assembled, the construction process is time-consuming and labor-consuming, the processing difficulty is high, and the overall dimension is difficult to ensure.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a method for manufacturing a special-shaped spiral body comprises the following steps:

step 1, splicing steel plates according to the external dimension of a circular tube body projected by a special-shaped spiral body, drawing equal dividing lines on the spliced steel plates, and drawing basic dimension lines of the spiral body on the equal dividing lines according to lofting dimensions; the drawn part needs to be turned over and inserted into a pipe coiling machine downwards to be coiled; under the condition that turning is inconvenient, spot cutting needs to be carried out on the size line of the spiral body, a steel plate is rolled into a round pipe body and corrected, and then the cutting points are connected and the line is supplemented;

Step 2, carrying out ovality detection, correction and reinforcement treatment on the rolled circular pipe body according to the external dimension of the spiral body to ensure the structural dimension of the spiral body;

Step 3, performing sectional lofting and rolling on the spiral vertical plates according to the dimension lines of the spiral bodies, and polishing the head-to-tail flush lines of the spiral vertical plates so as to connect adjacent spiral vertical plates;

Step 4, aligning the spiral vertical plates to a dimension line on the circular pipe body, welding, and then detecting and correcting the curvature and the distance of the multilayer spiral vertical plates; and (3) cutting the spiral panel blank in the step (2) to obtain spiral panels, welding the spiral panels with the spiral vertical plates one by one, and then cutting uncut spot portions according to the dimension line of the spiral body to finally finish the manufacturing of the spiral body.

in the scheme, in the step 1, the spiral body size line comprises spiral bottom plate lofting and spiral panel lofting.

In the above scheme, in step 2, the circular pipe body comprises a spiral bottom plate blank and a spiral panel blank.

In the scheme, in the step 2, the ovality detection device, the ovality correction device with the central bracket and the tire rotating workbench for manufacturing the pipeline capable of meeting the height difference plane are respectively adopted to carry out ovality detection, correction and reinforcement.

In the above scheme, the ovality detection device comprises a bracket, a central tube and a distance meter; two ends of the bracket are respectively provided with a bracket seat, and the bracket seats are fixedly connected with the pipe wall of the pipeline; the bracket and the bracket seats form two groups of structures which are respectively arranged at two ends of the pipeline; two ends of the central pipe are respectively connected with the centers of the two brackets, and the central pipe is positioned on a central shaft of the pipeline; the range finder fixing base is movably mounted on the central tube, and the range finder is mounted on the range finder fixing base.

In the scheme, the distance measuring instrument fixing seat comprises a sleeve and a locking device, the sleeve is sleeved on the central pipe, a second clamping plate is fixedly installed on the sleeve and consists of two iron plates which are oppositely arranged, and the two iron plates form a notch so as to clamp the distance measuring instrument; the locking device comprises a sleeve, the sleeve is arranged on the sleeve, and the interior of the sleeve is communicated with the interior of the sleeve; the sleeve pipe is inserted with a pin shaft, the periphery of the pin shaft comprises an arc surface and a plane, when the arc surface of the pin shaft is in contact with and pressed against the outer wall of the central pipe inside the sleeve, the sleeve and the central pipe can be locked, and when the arc surface of the pin shaft is staggered with the outer wall of the central pipe inside the sleeve, the sleeve and the central pipe can move relatively.

In the above scheme, the ovality correction device with the central bracket comprises an ovality correction device and a central bracket, wherein the ovality correction device comprises an annular seat, a plurality of support rods arranged on the periphery of the annular seat in a radial shape, a connecting rod for connecting the support rods, and a support arranged at the end part of the support rod; the central bracket comprises a central rod and at least two lifting frames with adjustable heights, wherein the central rod is installed in the center of the ovality correction device, and the heights of the central rod and the lifting frames are adjusted.

in the above scheme, the ovality correction device further comprises a center seat, the center seat is fixedly installed in the inner ring of the annular seat, and a through hole for the center rod to pass through is formed in the center of the center seat.

In the scheme, the tire rotating workbench for pipeline manufacturing comprises a left tire rotating wheel, a right tire rotating wheel, a wheel seat, a base beam, an interval adjusting mechanism and a lifting mechanism; the left tire turning wheel and the right tire turning wheel are respectively arranged on the wheel seats, the wheel seats are provided with first driving motors for driving the tire turning wheels to rotate, the wheel seats are arranged on the base beam, and the distance adjusting mechanism is arranged between the two wheel seats to adjust the distance between the two tire turning wheels; the lifting mechanism drives the base beam to integrally do lifting motion.

in the above scheme, the distance adjusting mechanism comprises a dual-output worm-screw transmission, and the output end of the worm-screw transmission is respectively connected with two screws with opposite screw threads; a rotating shaft is arranged on a horizontal plate of the wheel seat, a sliding block is arranged below the rotating shaft, and the wheel seat is movably connected with the sliding block through the rotating shaft; and the sliding block is provided with a threaded hole matched with the lead screws, and the two lead screws are respectively connected with the sliding blocks below the two wheel seats through screw threads.

The invention has the beneficial effects that:

1. The existing manufacturing method is to set out the spiral bottom plate, the spiral vertical plate and the spiral panel of the special-shaped spiral body one by one, discharge, roll, assemble and weld, and finally carry out overall assembly, so that the construction process is time-consuming and labor-consuming, the processing difficulty is high, and the overall dimension is difficult to guarantee. The technology of the invention takes the circular tube body projected by the special-shaped spiral body as the conjoined embryonic form of the spiral bottom plate, and the whole circular tube body is convenient to detect and correct and is convenient to use devices such as a tire rotating platform to assist in construction.

2. The matching degree of the existing detection mode and the real-time correction is not high, the detection and correction alternation flexibility cannot be met, and the correction basis cannot be provided for the pipe wall correction in real time. The invention relates to an ovality detection device, wherein supports and a central pipe are erected at two ends of a pipeline, the central pipe is positioned at the central position of the pipeline, a sleeve is sleeved in the central pipe, when the ovality of the steel pipe is detected and corrected, a distance meter is aligned to a part to be corrected to detect, and then a support is adopted to correct the pipe wall. The zero position of the distance measuring instrument needs to be aligned to the central axis of the pipeline, so that errors caused during reading conversion are avoided.

3. The ovality correction device is provided with a central bracket, an annular seat is firstly supported on the central axis of the pipeline, and then the assembly of the support rod, the connecting rod and the support is gradually completed, so that the outer end of the support is in a circular track. The circular trajectory can be gradually made to coincide with the inner circle of the pipe by adjusting the support. The problems of material waste caused by the temporary welding of the supporting structure inside the pipeline in the traditional process and the increase of labor consumption for cutting and polishing the welding point of the inner wall are solved.

4. Compared with the prior art, the tire rotating wheel drives and adjusts the distance between the left tire rotating wheel and the right tire rotating wheel through the distance adjusting mechanism, the application range of the tire rotating workbench is expanded, and the tire rotating workbench can be suitable for pipelines with different diameters. The height of the tire rotating wheel is adjustable, a construction site is narrow, a part of the tire rotating wheel is provided with a plane with a height difference, and when a diameter-variable pipeline is manufactured, the distance and the height of the tire rotating wheels of a plurality of tire rotating workbenches on one axis are adjusted one by one. When the tyre wheel contacts with the pipe wall, the rotating shaft is driven to change the angle, so that the angle change of the pipeline with the proper diameter is self-adaptive. The requirement of the vertical basal plane of the welding surface can be met by adjusting the axis of the pipe orifice to a horizontal line.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic diagram of the shape of a profiled spiral gate with a technical steel structure;

FIG. 2 is a schematic diagram of a profiled spiral body structure;

FIG. 3 is a schematic view of the spiral bottom plate lofting of step 1 of the method of the present invention;

FIG. 4 is a schematic view of step 1 of the method of the present invention for rolling a spiral base sheet blank;

FIG. 5 is a schematic illustration of the spiral panel lofting of step 1 of the method of the present invention;

FIG. 6 is a schematic view of the method of the present invention, step 1, rolling a spiral panel blank;

FIG. 7 is a schematic view of a spiral riser;

FIG. 8 is a lofted expanded view of the spiral riser at step 3 of the method of the present invention;

FIG. 9 is a schematic view of a spiral riser section lofting of step 3 of the method of the present invention;

FIG. 10 is a schematic view of the end-to-end butt-joint of spiral risers in step 3 of the method of the present invention;

FIG. 11 is a schematic view of the spiral riser installation of step 4 of the method of the present invention;

FIG. 12 is a schematic view of the installation of a spiral panel in step 4 of the method of the present invention;

FIG. 13 is a schematic view of an ovality detection apparatus used in the method of the present invention;

FIG. 14 is a structural view of a bracket holder of the ovality detecting apparatus shown in FIG. 13;

FIG. 15 is a structural view of a rangefinder mount of the ovality detection apparatus shown in FIG. 13;

FIG. 16 is a block diagram of an ovality correction apparatus for use in the method of the present invention;

FIG. 17 is a block diagram of a hoist frame of the center console used in the method of the present invention;

FIG. 18 is an assembled view of the structure of FIGS. 16 and 17;

FIG. 19 is a schematic view of the combined use of FIGS. 13 and 16;

FIG. 20 is a schematic view of a tire rotator for manufacturing a pipeline according to the method of the present invention;

Fig. 21 is an overall configuration view of the tire rotating table for manufacturing a pipe shown in fig. 20;

FIG. 22 is a schematic view of a tire transfer wheel spacing, height adjustment of the tire transfer station for pipe making shown in FIG. 21;

FIG. 23 is a schematic view of the tire rotating wheel, spindle and slide being deployed from the tire rotating table for pipe making shown in FIG. 21;

fig. 24 is a schematic structural view of a pitch adjustment mechanism of the tire transfer table for manufacturing a pipe shown in fig. 21.

In the figure: 100. a helical body; 110. a spiral base plate; 120. a spiral vertical plate; 130. a spiral panel;

200. An ovality detecting device; 210. a first bracket; 220. a bracket holder; 221. a base; 222. a cover plate; 223. fastening bolts; 224. a first splint; 225. carrying out top thread; 230. a central tube; 240. a distance meter fixing base; 241. a sleeve; 242. a second splint; 243. a locking device; 2431. an active cannula; 2432. a pin shaft; 2433. a handle; 250. a range finder; 260. building buckles; 310. an ovality correcting device; 311. an annular seat; 312. a support bar; 313. a connecting rod; 314. a support; 3141. a first sleeve; 3142. a first lead screw; 3143. a first handle; 315. a connector; 316. a branch connector; 317. a flange; 318. a center seat; 320. a center pole; 330. a hoisting frame; 331. a support; 332. a leg base; 333. a support leg; 334. a roller; 335. a lifting rod base; 336. lifting the lifting rod; 3361. a second sleeve; 3362. a second lead screw; 3363. a second handle; 337. a central sleeve; 400. a tire rotating workbench; 411. a left-turning tire wheel; 412. a right-turn tire wheel; 420. a wheel seat; 421. a rotating shaft; 422. a slider; 430. a base beam; 440. a spacing adjustment mechanism; 441. a worm screw speed changer; 442. a lead screw; 443. a hand wheel; 450. a second bracket; 460. a base; 470. a lifting mechanism; 471. a worm screw hoist; 472. a third screw rod; 473. a link rod; 480. a diverter; 491. a first drive motor; 492. a second drive motor.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

The method for manufacturing the special-shaped spiral body comprises the following steps:

step 1, as shown in fig. 3 to 6, splicing steel plates according to the external dimension of a circular tube body projected by the special-shaped spiral body 100, drawing a bisector on the spliced steel plates, and drawing a basic dimension line of the spiral body 100 on the bisector according to the lofting dimension. The drawn part needs to be turned over and inserted into a pipe coiling machine downwards to be coiled; under the condition that turning is inconvenient, the 100-dimension line of the spiral body needs to be cut in a point-remaining mode, after the steel plate is rolled into a round pipe body and corrected, the cutting points are connected and supplemented with lines (namely, the punctured points are drawn, the points are connected into a complete line, and the line of the inner wall of the cylinder is drawn on the outer wall).

In this example, the spiral 100 dimensional line includes a spiral floor 110 loft and a spiral panel 130 loft.

And 2, as shown in fig. 19, carrying out ovality detection, correction and reinforcement on the rolled circular pipe body according to the external dimension of the spiral body 100, so as to ensure the structural dimension of the spiral body 100.

in this example, the tubular body includes a blank of the spiral base plate 110 and a blank of the spiral face plate 130.

Step 3, as shown in fig. 7 to 10, the spiral risers 120 are subjected to sectional lofting (fig. 7 to 9) and rolling according to the dimension lines of the spiral body 100, and the head-to-tail flush lines of the spiral risers 120 are ground (fig. 10) so as to connect the adjacent spiral risers 120.

And 4, aligning the spiral vertical plate 120 to a dimension line on the circular pipe body, and welding. The curvature and spacing of the multi-layer spiral risers 120 are then detected and corrected, as shown in fig. 11. And (3) cutting the blank body of the spiral panel 130 in the step (2) to obtain the spiral panel 130, welding the spiral panel 130 with the spiral vertical plates 120 piece by piece as shown in fig. 12, and then cutting the uncut spot portions according to the dimension line of the spiral body 100 to finally finish the manufacturing of the spiral body 100.

In the manufacturing method, the ovality detection device 200, the ovality correction device with the central bracket and the tire rotating workbench 400 for manufacturing the pipeline which can meet the height difference plane are adopted in the step 2, so that the manufacturing efficiency is improved, and the manufacturing precision is ensured.

As shown in fig. 13 to 15, the ovality detecting device 200 includes a first bracket 210, a center tube 230, and a distance meter 250. Two ends of the first bracket 210 are respectively provided with a bracket seat 220, and the bracket seats 220 are fixedly connected with the pipe wall of the pipeline; the first bracket 210 and the bracket holder 220 form two groups of structures which are respectively arranged at two ends of the pipeline; the two ends of the central tube 230 are respectively connected with the centers of the two first brackets 210, and the central tube 230 is positioned at the central axis of the pipeline; the center tube 230 is movably provided with a distance meter fixing seat 240, and the distance meter 250 is arranged on the distance meter fixing seat 240.

Preferably, the first bracket 210 is a building steel pipe, and the length of the first bracket 210 is greater than the outer diameter of the pipe.

Preferably, the bracket holder 220 includes a base 221, a cover plate 222, and a fastening bolt 223, wherein one side of the base 221 is hinged to the cover plate 222, a space adapted to the first bracket 210 is formed between the base 221 and the cover plate 222, the first bracket 210 is installed in the space, the fastening bolt 223 is disposed on the base 221, and the base 221 and the cover plate 222 are fastened by the fastening bolt 223 when being folded.

Further preferably, the bracket holder 220 further comprises a first clamping plate 224 and a top thread 225; the first clamping plate 224 is installed on the other side of the base 221, the base 221 and the first clamping plate 224 form a U-shaped notch, one side of the first clamping plate 224 is provided with a jackscrew 225, the notch of the first clamping plate 224 is clamped on the tube wall, and the bracket holder 220 is fixed on the tube wall by adjusting the jackscrew 225.

Preferably, the distance measuring device fixing base 240 includes a sleeve 241, the sleeve 241 is sleeved on the central tube 230, a second clamping plate 242 is fixedly installed on the sleeve 241, the second clamping plate 242 is formed by two oppositely-arranged iron plates, and the two iron plates form a notch so as to clamp the distance measuring device 250.

Preferably, the distance meter fixing base 240 further includes a locking device 243, and the sleeve 241 is fixed by the locking device 243 after axially moving or rotating on the central tube 230. Locking device 243 comprises an active sleeve 2431, active sleeve 2431 being mounted on sleeve 241, the interior of active sleeve 2431 being in communication with the interior of sleeve 241; the movable sleeve 2431 is internally inserted with a pin 2432, the outer periphery of the pin 2432 includes a circular arc surface and a flat surface, when the circular arc surface of the pin 2432 contacts and presses the outer wall of the central tube 230 inside the sleeve 241, the sleeve 241 and the central tube 230 can be locked, and when the circular arc surface of the pin 2432 is staggered with the outer wall of the central tube 230 inside the sleeve 241, the sleeve 241 and the central tube 230 can relatively move.

preferably, a handle 2433 is provided at the end of the pin 2432 to rotate the pin 2432.

Further preferably, the center tube 230 is fixedly connected to the center of the first bracket 210 by a construction clasp 260.

When the device is used, the first bracket 210 and the central pipe 230 are erected at two ends of a pipeline, the central pipe 230 is located at the central shaft position of the pipeline, the sleeve 241 is sleeved on the central pipe 230, when the ovality of the steel pipe is detected and corrected, the distance measuring instrument 250 is aligned to a part needing to be corrected to be detected, and then the correction device 300 is used for correcting the wall of the pipe. The zero position of the distance meter 250 needs to be aligned to the central axis of the pipeline, so that errors caused during reading conversion are avoided.

as shown in fig. 16 to 19, the ovality correction device with the center bracket includes an ovality correction device 310 and a center bracket. The ovality correction apparatus 310 includes an annular seat 311, eight support rods 312 radially installed at the outer circumference of the annular seat 311, a link 313 for connecting the support rods 312, and a supporter 314 installed at the end of the support rods 312. The annular seat 311, the support rod 312, the connecting rod 313 and the support 314 form a whole to correct the ovality of the pipeline, a central bracket needs to be supported in the assembling process, the annular seat 311 is supported on the central axis of the pipeline, the assembly of the support rod 312, the connecting rod 313 and the support 314 is gradually completed, and the outer end of the support 314 is located in a circular track. The circular trajectory can be gradually brought into conformity with the inner circle of the duct by adjusting the support 314. The center bracket includes a center rod 320 and at least two height-adjustable risers 330, the center rod 320 being mounted in the center of the ovality correction device 310 and being height-adjusted by the risers 330.

The ovality correction device 310 may be used in combination with the ovality detection device 200, with detection followed by correction. In order to avoid the ovality detection device 200, the central reserved hole of the annular seat 311 of the ovality correction device 310 is large, and a central seat 318 is added to match with the central rod 320. The central seat 318 is connected to the annular seat 311 by bolts, and when the supporter 314 is pressed against the inner wall of the pipe, the central rod 320 and the central seat 318 can be removed, thereby providing a space for installing the ovality detecting device 200.

The ovality correction device 310 is used by first positioning a central bracket within the pipe, adjusting the annular seat 311 to the central axial position of the pipe, and then assembling the support bar 312, the link 313 and the support 314 so that the outer end of the support 314 is in a circular path. The circular trajectory can be gradually brought into conformity with the inner circle of the duct by adjusting the support 314. The center block 318 is then removed and the ovality detection device 200 is installed, with alternate inspection and then calibration of the pipe.

Preferably, two lifting frames 330 are provided, and are respectively disposed on two sides of the ovality correction device 310. For supporting the central rod 320 and adjusting the height of the central rod 320.

Further optimize, annular seat 311 evenly sets up a plurality of connector 315 along circumference, passes through flange 317 between connector 315 and the bracing piece 312 and connects.

preferably, the end of the supporting rod 312 is provided with a branch connector 316, the branch connector 316 comprises three branches to form a Y-shaped structure, two branches are respectively connected with the connecting rods 313 on two sides through flanges 317, and one branch is connected with the supporting device 314 through the flange 317. The connecting rod 313 is a straight pipe structure, and flanges 317 are provided at both ends to connect with the branch connectors 316.

Further preferably, the support 314 comprises a first sleeve 3141 and a first screw rod 3142 which are matched with each other, the first screw rod 3142 is connected with the support rod 312, one end of the first sleeve 3141 is provided with a screw thread which is matched with the first screw rod 3142, the first sleeve 3141 can be extended or shortened through rotation to adjust the radius, the other end of the first sleeve 3141 is a hemisphere, and the hemisphere is supported on the pipeline to correct the ellipticity. A flange 317 is provided at one side of the first lead screw 3142 to be connected to the branch connection terminal 316.

preferably, the first sleeve 3141 is provided with a first handle 3143 for facilitating rotational adjustment.

preferably, the lifting frame 330 includes an i-shaped support 331, four corners of the support 331 are provided with support bases 332, the support bases 332 are provided with support legs 333, and the bottoms of the support legs 333 are provided with rollers 334. The center of the support 331 is provided with a lifting rod seat 335, a telescopic lifting rod 336 is mounted on the lifting rod seat 335, and a center sleeve 337 for the center rod 320 to pass through is mounted on the top of the lifting rod 336. The central rod 320 passes through the central sleeve 337 on one side, the annular seat 311 to the central sleeve 337 on the other side in sequence, supporting the annular seat 311 on the central axis of the duct.

preferably, the lifting rod 336 includes a second sleeve 3361 and second lead screws 3362 installed at two ends of the second sleeve 3361, the second lead screws 3362 at two sides of the second sleeve 3361 are respectively a positive thread and a negative thread, the second sleeve 3361 can be extended or shortened simultaneously when rotating, and the lead screw located below is fixedly connected with the lifting rod base 335. The second sleeve 3361 is provided with a second handle 3363 to allow for rotational manipulation to quickly adjust the height position of the central sleeve 337.

As shown in fig. 20 to 24, the conduit building rotary tire work station 400 includes a left rotary tire wheel 411, a right rotary tire wheel 412, a wheel base 420, a base beam 430, a pitch adjustment mechanism 440, and a lifting mechanism 470. The left tire turning wheel 411 and the right tire turning wheel 412 are respectively arranged on a wheel seat 420, a first driving motor 491 for driving the tire turning wheel to rotate is arranged on the wheel seat 420, the wheel seat 420 is arranged on a base beam 430, and a spacing adjusting mechanism 440 is arranged between the two wheel seats 420 for adjusting the spacing between the two tire turning wheels; the lifting mechanism 470 drives the base beam 430 to move up and down integrally to adjust the height of the tire wheel.

Preferably, the wheel base 420 includes two parallel vertical plates and a horizontal plate installed at the lower ends of the two vertical plates, the left-turning tire wheel 411 or the right-turning tire wheel 412 is installed between the two vertical plates and connected to the first driving motor 491 through a rotating shaft, and the first driving motor 491 is installed on the horizontal plate. The base beam 430 is a seat body formed by two steel structures arranged in parallel at intervals, the horizontal plates of the wheel seats 420 are erected on the upper surfaces of the two steel structures, and the wheel seats 420 can move along the base beam 430 under the action of the distance adjusting mechanism 440.

Further preferably, the distance adjusting mechanism 440 includes a dual-output worm-screw transmission 441, and the output end of the worm-screw transmission 441 is respectively connected with two screws 442 with opposite threads; a rotating shaft 421 is installed on the horizontal plate of the wheel seat 420, a sliding block 422 is installed below the rotating shaft 421, and the wheel seat 420 is movably connected with the sliding block 422 through the rotating shaft 421; threaded holes matched with the lead screws 442 are formed in the sliding blocks 422, and the two lead screws 442 are connected with the sliding blocks 422 below the two wheel seats 420 through threads respectively.

preferably, the distance adjusting mechanism 440 further comprises a steering device 480 and a hand wheel 443, the hand wheel 443 is connected with the worm-gear lead screw transmission 441 through the steering device 480, and the hand wheel 443 is rotated to drive the worm-gear lead screw transmission 441 to work. The slider 422 drives and adjusts the distance between the left tire turning wheel 411 and the right tire turning wheel 412, so that the application range of the tire turning workbench 400 is expanded, and the tire turning workbench can be suitable for pipelines with different diameters.

Preferably, the sliding block 422 slides between the two bodies of the base beam 430 along the length direction of the bodies.

Preferably, a second bracket 450 and a base 460 are sequentially arranged below the base beam 430, and a lifting mechanism 470 is arranged between the second bracket 450 and the base 460.

preferably, two sets of the second brackets 450 and the bases 460 are respectively arranged at two ends of the base beam 430; the lifting mechanism 470 includes a plurality of worm screw lifters 471, one worm screw lifter 471 is installed at each end of the two second brackets 450, and a third screw 472 of the worm screw lifter 471 passes through the second bracket 450 and is supported on the base 460, so as to adjust the height of the second bracket 450.

Preferably, the four worm screw lifters 471 are synchronously connected through a steering gear 480 and a link rod 473, wherein the two worm screw lifters 471 at the same side are synchronously connected through a link rod 473, the two link rods 473 at both sides are connected through another link rod 473, the three link rods 473 form an H-shaped structure, the intersections of the link rods 473 are respectively connected through a steering gear 480, the outer side of the H-shaped structure formed by the three link rods 473 is connected with a second driving motor 492 through the steering gear 480, and the second driving motor 492 is fixed on the base beam 430 through a bottom plate.

When the equal-diameter pipeline is manufactured, a plurality of tire rotating workbenches 400 are placed on one axis according to the manufacturing length of the pipeline, the tire rotating wheel interval of each tire rotating workbench 400 is adjusted according to the size of the pipeline, and the tire rotating wheels of the tire rotating workbenches 400 are matched to rotate synchronously. After debugging, the pipeline can be placed for rotary welding construction.

When the diameter-variable pipeline is manufactured, the distance and the height of the tire rotating wheels of the plurality of tire rotating workbenches 400 on one axis need to be adjusted one by one. When the tyre wheel contacts with the pipe wall, the rotating shaft 421 is driven to change the angle, so as to adapt to the angle change of the variable-diameter pipeline. The rotating speed of the tire rotating wheel of each tire rotating workbench 400 needs to be adjusted according to the change of the pipe diameter.

When the diameters of the two ends of the variable-diameter pipeline have larger difference and the tire rotating wheel is adaptive to the angle change of the variable-diameter pipeline and the contact of the pipe wall still has included angles, the worm wheel screw rod lifters 471 at the two sides of the base beam 430 can be respectively controlled, so that the tire rotating wheel is matched with the pipe wall.

The manufacturing method of the special-shaped spiral body and the related manufacturing device have the following beneficial effects:

the embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

while the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for manufacturing a special-shaped spiral body is characterized by comprising the following steps:

step 1, splicing steel plates according to the external dimension of a circular tube body projected by a special-shaped spiral body, drawing equal lines on the spliced steel plates, drawing basic dimension lines of the spiral body on the equal lines according to the lofting dimension, and sequentially obtaining lofting of a spiral bottom plate and lofting of a spiral panel through the method; inserting the marked part into a pipe coiling machine with the turning surface facing downwards, and coiling to obtain two circular pipe bodies which are respectively a spiral bottom plate blank body and a spiral panel blank body; under the condition that turning is inconvenient, spot cutting needs to be carried out on the size line of the spiral body, a steel plate is rolled into a round pipe body and corrected, and then the cutting points are connected and the line is supplemented;

Step 2, respectively carrying out ovality detection, correction and reinforcement treatment on the two rolled circular pipe bodies according to the external dimension of the spiral body to ensure the structural dimension of the spiral body;

Step 3, performing sectional lofting and rolling on the spiral vertical plates according to the lofting dimension line of the spiral bottom plate, and polishing the end-to-end flush lines of the spiral vertical plates so as to connect adjacent spiral vertical plates;

Step 4, aligning the spiral vertical plates to a dimension line on the spiral bottom plate blank, welding, and then detecting and correcting the curvature and the spacing of the multilayer spiral vertical plates; and (3) cutting the spiral panel blank in the step (2) to obtain spiral panels, welding the spiral panels with the spiral vertical plates one by one, and then cutting uncut spot portions according to the dimension lines on the spiral bottom plate blank to finally finish the manufacturing of the spiral body.

2. The method for manufacturing the special-shaped spiral body according to claim 1, wherein the ovality detection device, the ovality correction device with the central bracket and the tire rotating workbench for manufacturing the pipeline capable of meeting the height difference plane are respectively adopted in the step 2 for ovality detection, correction and reinforcement.

3. A method of forming a profiled spiral body as claimed in claim 2, wherein the ovality detecting means includes a bracket, a central tube and a distance meter; two ends of the bracket are respectively provided with a bracket seat, and the bracket seats are fixedly connected with the pipe wall of the pipeline; the bracket and the bracket seats form two groups of structures which are respectively arranged at two ends of the pipeline; two ends of the central pipe are respectively connected with the centers of the two brackets, and the central pipe is positioned on a central shaft of the pipeline; the range finder fixing base is movably mounted on the central tube, and the range finder is mounted on the range finder fixing base.

4. The method for manufacturing the special-shaped spiral body as claimed in claim 3, wherein the distance measuring instrument fixing seat comprises a sleeve and a locking device, the sleeve is sleeved on the central tube, a second clamping plate is fixedly installed on the sleeve and consists of two oppositely arranged iron plates, and the two iron plates form a notch so as to clamp the distance measuring instrument; the locking device comprises a sleeve, the sleeve is arranged on the sleeve, and the interior of the sleeve is communicated with the interior of the sleeve; the sleeve pipe is inserted with a pin shaft, the periphery of the pin shaft comprises an arc surface and a plane, when the arc surface of the pin shaft is in contact with and pressed against the outer wall of the central pipe inside the sleeve, the sleeve and the central pipe can be locked, and when the arc surface of the pin shaft is staggered with the outer wall of the central pipe inside the sleeve, the sleeve and the central pipe can move relatively.

5. The method for manufacturing the profiled spiral body as claimed in claim 2, wherein the ovality correction device with the central bracket comprises an ovality correction device and a central bracket, the ovality correction device comprises an annular seat, a plurality of support rods arranged on the periphery of the annular seat in a radial shape, a connecting rod used for connecting the support rods, and a support device arranged at the end part of the support rod; the central bracket comprises a central rod and at least two lifting frames with adjustable heights, wherein the central rod is installed in the center of the ovality correction device, and the heights of the central rod and the lifting frames are adjusted.

6. A profiled spiral body manufacturing method according to claim 5, characterized in that the ovality correction device further comprises a central seat fixedly installed in the inner ring of the annular seat, and a through hole for the central rod to pass through is formed in the center of the central seat.

7. The method for manufacturing the profiled spiral body as claimed in claim 2, wherein the tire rotating table for manufacturing the pipeline comprises a left tire rotating wheel, a right tire rotating wheel, a wheel seat, a base beam, a spacing adjusting mechanism and a lifting mechanism; the left tire turning wheel and the right tire turning wheel are respectively arranged on the wheel seats, the wheel seats are provided with first driving motors for driving the tire turning wheels to rotate, the wheel seats are arranged on the base beam, and the distance adjusting mechanism is arranged between the two wheel seats to adjust the distance between the two tire turning wheels; the lifting mechanism drives the base beam to integrally do lifting motion.

8. the method for manufacturing the profiled spiral body as claimed in claim 7, wherein the distance adjusting mechanism comprises a dual-output worm screw speed changer, and the output end of the worm screw speed changer is respectively connected with two screw rods with opposite screw threads; a rotating shaft is arranged on a horizontal plate of the wheel seat, a sliding block is arranged below the rotating shaft, and the wheel seat is movably connected with the sliding block through the rotating shaft; and the sliding block is provided with a threaded hole matched with the lead screws, and the two lead screws are respectively connected with the sliding blocks below the two wheel seats through screw threads.