CN218192181U - Local shaping equipment for large steel pipe - Google Patents

Abstract

The utility model discloses a large-scale steel pipe local shaping device, which comprises a shaping machine, wherein conveying mechanisms for conveying steel pipes are arranged on two sides of the shaping machine, and the shaping machine and the conveying mechanisms are positioned on the same straight line; the shaping machine comprises a base, wherein a cross beam is arranged above the base, a power element for driving the cross beam to move up and down along an upright post is arranged on the base, and the upright post is fixed on the base; the crossbeam is provided with a moving element for driving the upper die base to move, the base is provided with a lower die base matched with the upper die base, dies for placing steel pipes are arranged on the upper die base and the lower die base, a local inner shaping structure of the steel pipes is arranged in the steel pipes, and a local outer shaping structure of the steel pipes is arranged between the steel pipes and the dies of the upper die base. The utility model adopts the above structure local plastic equipment of large-scale steel pipe can solve the local problem of being difficult for the plastic of large-scale steel pipe, has simple structure, convenient to use's advantage.

Description

Local shaping equipment for large steel pipe

Technical Field

The utility model belongs to the technical field of the plastic equipment technique and specifically relates to a local plastic equipment of large-scale steel pipe is related to.

Background

The production of large steel pipes generally adopts a pressure head or a compression roller to gradually bend a steel plate for a plurality of times, and finally, two ends of the steel plate are welded together by a welding machine, thereby forming the steel pipe. Because the steel pipe is formed through multiple times gradually, the surface of the steel pipe is partially provided with bulges or pits, so that the surface of the steel pipe is not flat, and the steel pipe needs to be shaped.

Current patent CN212311628U discloses a nonrust steel pipe shaping device, including L type backup pad, the backup pad top sets up supporting mechanism, and backup pad one side is provided with hydraulic pressure mechanism, and hydraulic pressure mechanism's top is provided with stop gear, and the backup pad below is provided with plastic mechanism. However, the shaping device is only used for shaping the end of the stainless steel pipe, and is not suitable for shaping the wall of the stainless steel pipe. The prior patent CN215279236U discloses a large-caliber special steel pipe rapid shaping device, which comprises a fixed support, a fixed plate, a driving cylinder, a push plate, a guide rail, a base, a first connecting plate, a first cylinder, a second connecting plate and a second cylinder; extruding the steel pipe body and the second die through external force, so that the outer diameter of the steel pipe body is reduced; the steel pipe body is relatively fixed through the second die, the first die without the cavity is used for stopping the linear motion of the steel pipe body, and the deformation die is driven by external force to move along the interior of the steel pipe body, so that the inner diameter of the steel pipe body is increased. The shaping device in the patent is suitable for expanding and reducing the diameter of the thin-wall steel pipe and is not suitable for local shaping of large-scale steel pipes. Therefore, the conventional shaping device is not suitable for local shaping of large steel pipes.

Because the shaping of the large thick-wall steel pipe is very difficult, the thick-wall structure can be shaped by adopting very large acting force, and if the steel pipe is shaped by adopting an integral straightening or rounding mode, the required equipment pressure is very high, the equipment cost is undoubtedly increased, and the shaping difficulty of the thick-wall large-diameter steel pipe is increased; and the purpose of local defect reshaping cannot be achieved by adopting an integral reshaping mode.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a local plastic equipment of large-scale steel pipe solves the problem of the local difficult plastic of large-scale steel pipe, has simple structure, convenient to use's advantage.

In order to achieve the purpose, the utility model provides a large-scale steel pipe local shaping device, which comprises a shaping machine, wherein conveying mechanisms for conveying steel pipes are arranged at two sides of the shaping machine, and the shaping machine and the conveying mechanisms are positioned on the same straight line; the shaping machine comprises a base, wherein a cross beam is arranged above the base, a power element for driving the cross beam to move up and down along an upright post is arranged on the base, and the upright post is fixed on the base; the crossbeam is provided with a moving element for driving the upper die base to move, the base is provided with a lower die base matched with the upper die base, dies for placing steel pipes are arranged on the upper die base and the lower die base, a local inner shaping structure of the steel pipes is arranged in the steel pipes, and a local outer shaping structure of the steel pipes is arranged between the steel pipes and the dies of the upper die base.

Preferably, the power element is a jacking hydraulic cylinder, the jacking hydraulic cylinder is fixed on the base, and a telescopic rod of the jacking hydraulic cylinder is fixedly connected with the cross beam; through holes for the upright posts to pass through are formed in the two ends of the cross beam, and the cross beam is connected with the upright posts in a sliding mode.

Preferably, the moving element is a pressing hydraulic cylinder, the pressing hydraulic cylinder is fixed on the cross beam, and a telescopic rod of the pressing hydraulic cylinder is fixedly connected with the upper die base.

Preferably, a semicircular upper die frame is arranged on the lower surface of the upper die base, a semicircular lower die frame is arranged on the upper surface of the lower die base, and the die sheet is fixed on the upper die frame and the lower die frame through bolts; a plurality of stiffened plates are uniformly arranged between the upper die frame and the upper die base, and a plurality of stiffened plates are uniformly arranged between the lower die frame and the lower die base.

Preferably, the local inner shaping structure comprises a shaping hydraulic cylinder, a supporting seat is arranged at the bottom of the shaping hydraulic cylinder, the lower surface of the supporting seat is an arc surface matched with the inner wall of the steel pipe, and an inner supporting die is arranged on a telescopic rod of the shaping hydraulic cylinder.

Preferably, the top surface of the inner supporting die is an arc surface matched with the inner wall of the steel pipe.

Preferably, the local outer shaping structure comprises an outer support die, and the lower surface of the outer support die is provided with an arc surface matched with the outer wall of the steel pipe.

Preferably, the conveying mechanisms are symmetrically arranged on two sides of the shaping machine, each conveying mechanism comprises a plurality of conveying rollers, the steel pipes are positioned above the conveying rollers, rotating rollers are arranged between the conveying rollers, and the rotating directions of the rotating rollers are perpendicular to the rotating directions of the conveying rollers; two rollers of the rotating roller are symmetrically arranged on two sides of the steel pipe.

The shaping method of the large steel pipe local shaping equipment comprises the following steps:

s1, fixing a die sheet matched with the steel pipe on an upper die frame and a lower die frame through bolts according to the size of the steel pipe to be shaped;

s2, hoisting the steel pipe onto a conveying roller, moving the steel pipe under the action of the conveying roller, and conveying the steel pipe to the upper part of a die sheet of a lower die holder of the shaping machine;

s3, starting the rotating roller, and driving the steel pipe to rotate around the axis through the rotating roller, so that the part of the steel pipe to be shaped is adjusted to be right above the steel pipe;

s4, placing the supporting seat and the shaping hydraulic cylinder into the steel pipe, adjusting the position of the shaping hydraulic cylinder to enable the shaping hydraulic cylinder to be located right below the part to be shaped, placing an inner supporting die at the top of a telescopic rod of the shaping hydraulic cylinder, enabling the inner supporting die to be located right below or on two sides of the part to be shaped, adjusting the distance between the inner supporting dies, extending the shaping hydraulic cylinder, and enabling the inner supporting die to be in contact with the inner wall of the steel pipe;

s5, placing outer supporting molds on the outer wall of the steel pipe, wherein the outer supporting molds are positioned on two sides or right above the part to be shaped, adjusting the distance between the outer supporting molds, starting a pressing hydraulic cylinder, driving an upper mold base to move downwards by the pressing hydraulic cylinder, and pressing the outer supporting molds between the steel pipe and mold sheets of the upper mold base;

s6, starting a shaping hydraulic cylinder, driving an inner supporting die to move upwards by the shaping hydraulic cylinder, or driving an upper die base to move downwards by a pressing hydraulic cylinder, and shaping the local part of the steel pipe; after shaping is completed, the shaping hydraulic cylinder moves downwards, the upper die base moves upwards under the action of the pressing hydraulic cylinder, and the outer supporting die is taken down;

and S7, starting the conveying roller and the rotating roller, driving the steel pipe to continuously move and rotate until the next part to be shaped, and shaping the next part to be shaped.

Preferably, the inner diameter of the steel pipe is not less than 508mm, and the wall thickness is not less than 10mm.

Local plastic equipment of large-scale steel pipe's advantage and positive effect be:

1. two conveying mechanisms are arranged on two sides of the shaping machine, and the steel pipes are conveyed and supported through the conveying mechanisms, so that the stability of the steel pipes in the shaping process of the steel pipes is improved, the conveying and shaping of large steel pipes are facilitated, and the inside of shaping equipment for moving the local defect positions of the large steel pipes is facilitated.

2. The rotary roller arranged on the conveying mechanism is used for rotating the steel pipe, so that the pipe walls of the steel pipe at different positions can be shaped conveniently.

3. The shaping machine clamps the steel pipe through the die sheets of the upper die base and the lower die base, drives the inner supporting die to move through the shaping hydraulic cylinder, or drives the outer supporting die to move through the upper die base, and therefore local depressions and local protrusions on the side wall of the steel pipe are shaped. The utility model adopts the inner supporting die and the outer supporting die to locally shape the steel pipe, which not only can reduce the external force required by shaping, but also can effectively shape the local defect of the steel pipe; the hydraulic cylinder has the advantages of simple structure, convenient operation, small required hydraulic cylinder tonnage and good shaping effect.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the local shaping device for large steel pipes of the present invention;

FIG. 2 is a schematic structural view of a shaping machine according to an embodiment of the local shaping device for large steel pipes of the present invention;

fig. 3 is the schematic view of the local structure of the conveying mechanism of the local shaping device for large steel pipes of the present invention.

Reference numerals

1. A base; 2. a column; 3. a cross beam; 4. a jacking hydraulic cylinder; 5. a compaction hydraulic cylinder; 6. an upper die holder; 7. a lower die holder; 8. putting a mold frame; 9. a lower mold frame; 10. a stamper; 11. adding a rib plate; 12. a supporting seat; 13. shaping a hydraulic cylinder; 14. internally supporting the mold; 15. externally supporting the mold; 16. a steel pipe; 17. a conveying roller; 18. the roller is rotated.

Detailed Description

The technical solution of the present invention is further explained by the accompanying drawings and examples.

Unless defined otherwise, technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Examples

Fig. 1 is the utility model relates to a structural schematic diagram of local plastic equipment of large-scale steel pipe embodiment, fig. 3 is the utility model relates to a local structural schematic diagram of conveying mechanism of local plastic equipment of large-scale steel pipe embodiment. As shown in the figure, the large-scale steel pipe local shaping equipment comprises a shaping machine, wherein conveying mechanisms for conveying steel pipes 16 are arranged on two sides of the shaping machine, and the shaping machine and the conveying mechanisms are located on the same straight line. The conveying mechanisms are symmetrically arranged on two sides of the shaping machine. Conveying mechanism includes a plurality of conveying roller 17, and the motor drives conveying roller 17 and rotates, and conveying roller 17's axis is perpendicular with steel pipe 16. The steel pipe 16 is placed above the conveying rollers 17, and the conveying rollers 17 convey the steel pipe 16 by friction force to convey the steel pipe 16 into the shaping machine. A rotating roller 18 is arranged between the conveying rollers 17, the motor drives the rotating roller 18 to rotate, and the axis of the rotating roller 18 is parallel to the moving direction of the steel pipe 16. The rotation direction of the rotation roller 18 is perpendicular to the rotation direction of the conveyance roller 17. The two rollers of the rotating roller 18 are symmetrically arranged on both sides of the steel pipe 16, and the rotating directions of the two rollers are the same, so that the stability of the steel pipe 16 during rotation is improved. The rotating roller 18 is used to rotate the steel pipe 16 and adjust the position of the portion to be shaped of the steel pipe 16 so that the portion to be shaped is positioned directly above the steel pipe 16.

Fig. 2 is the structural schematic diagram of the shaping machine according to the embodiment of the local shaping equipment for large steel pipes of the present invention. As shown, the trimmer comprises a base 1, the base 1 being fixed to the ground. A beam 3 is arranged above the base 1, and a power element for driving the beam 3 to move up and down along the upright post 2 is arranged on the base 1. The bottom end of the upright post 2 is fixed on the base 1, and the top end of the upright post 2 is provided with a limiting block for preventing the cross beam 3 from slipping off from the upright post 2. The power element is a jacking hydraulic cylinder 4, the jacking hydraulic cylinder 4 is fixed on the base 1, and a telescopic rod of the jacking hydraulic cylinder 4 is fixedly connected with the cross beam 3. The both ends of crossbeam 3 are provided with the through-hole that makes stand 2 pass, and crossbeam 3 and stand 2 sliding connection, and stand 2 has the effect of direction to reciprocating of crossbeam 3, guarantees crossbeam 3's moving direction.

The beam 3 is provided with a moving element for driving the upper die holder 6 to move. The moving element is a pressing hydraulic cylinder 5, the pressing hydraulic cylinder 5 is fixed on the middle part of the cross beam 3, and a telescopic rod of the pressing hydraulic cylinder 5 is fixedly connected with the upper die base 6. The compressing hydraulic cylinder 5 drives the upper die holder 6 to move up and down through the expansion of the telescopic rod.

The base 1 is provided with a lower die holder 7 matched with the upper die holder 6, and the lower die holder 7 is positioned right below the upper die holder 6. A semicircular upper die frame 8 is arranged on the lower surface of the upper die holder 6, a semicircular lower die frame 9 is arranged on the upper surface of the lower die holder 7, and a die sheet 10 is fixed on the upper die frame 8 and the lower die frame 9 through bolts. The mold piece 10 can be replaced according to the outer diameter of the steel pipe 16 to adapt to the shaping requirement of the steel pipe 16 with different outer diameters. The diameter of the circle enclosed by the two dies 10 is equal to the outer diameter of the steel pipe 16.

A plurality of ribbed plates 11 are uniformly arranged between the upper die frame 8 and the upper die base 6, and a plurality of ribbed plates 11 are uniformly arranged between the lower die frame 9 and the lower die base 7, so that the strength of the upper die frame 8 and the lower die frame 9 is improved.

The steel pipe 16 is provided with a local inner shaping structure of the steel pipe 16. The local inner shaping structure comprises a shaping hydraulic cylinder 13, a supporting seat 12 is fixedly arranged at the bottom of the shaping hydraulic cylinder 13, and the shaping hydraulic cylinder 13 is fixedly connected with the supporting seat 12 through bolts or screws. The lower surface of the supporting seat 12 is an arc surface matched with the inner wall of the steel pipe 16, so that the placing stability of the supporting seat 12 in the steel pipe 16 is improved. An inner supporting die 14 is arranged on a telescopic rod of the shaping hydraulic cylinder 13, the inner supporting die 14 is placed on the telescopic rod of the shaping hydraulic cylinder 13, the number of the inner supporting dies 14 and the distance between the inner supporting dies 14 can be adjusted according to the local defect type of shaping required, the inner supporting dies 14 are placed on the hydraulic cylinder 13, the adjustment flexibility of the inner supporting dies 14 is improved, and the hydraulic cylinder 13 supports the inner supporting dies 14 against the inner wall of the steel pipe 16 through the jacking force of the telescopic rod. The top surface of the inner supporting die 14 is a cambered surface matched with the inner wall of the steel pipe 16.

And a local outer shaping structure of the steel pipe 16 is arranged between the steel pipe 16 and the die sheet 10 of the upper die holder 6. The outer shaping structure comprises an outer supporting die 15, the lower surface of the outer supporting die 15 is provided with a cambered surface matched with the outer wall of the steel pipe 16, and the upper surface of the outer supporting die 15 is provided with a cambered surface matched with the inner wall of the die sheet 10. The external support die 15 is also a free steel plate and does not need to be fixed on a die or a steel pipe, and the external support die 15 is fixed between the die 10 and the steel pipe 16 by the pressure of the pressing hydraulic cylinder 5 to shape the steel pipe 16. Because the number and the distance of the external supporting die 15 need to be adjusted according to the type and the size of the local defect of the steel pipe 16, the external supporting die 15 in a free mode improves the flexibility of the external supporting die 15, and is favorable for improving the local shaping efficiency of the large thick-wall steel pipe 16.

The shaping method of the large steel pipe 16 local shaping equipment comprises the following steps:

s1, fixing a die 10 matched with the steel pipe 16 on the upper die frame 8 and the lower die frame 9 through bolts according to the size of the steel pipe 16 to be shaped.

S2, hoisting the steel pipe 16 onto a conveying roller 17, moving the steel pipe 16 under the action of the conveying roller 17, conveying the steel pipe 16 to the upper part of the mold piece 10 of the lower mold base 7 of the shaping machine, and supporting the steel pipe 16 by the mold piece 10 so that the part, to be shaped, of the steel pipe 16 moves to the position right above the lower mold base 7.

And S3, starting the rotating roller 18, and driving the steel pipe 16 to rotate around the axis through the rotating roller 18, so that the part to be shaped of the steel pipe 16 is adjusted to be right above the steel pipe 16.

S4, manually placing the support seat 12 and the shaping hydraulic cylinder 13 into the steel pipe 16 through an existing conveying mechanism by a worker or through the existing conveying mechanism, adjusting the position of the shaping hydraulic cylinder 13 to enable the shaping hydraulic cylinder 13 to be located right below a part to be shaped, placing the inner supporting die 14 at the top of the telescopic rod of the shaping hydraulic cylinder 13, enabling the inner supporting die 14 to be located right below or on two sides of the part to be shaped, adjusting the distance between the inner supporting dies 14, extending the shaping hydraulic cylinder 13, and enabling the inner supporting die 14 to be in contact with the inner wall of the steel pipe 16 to achieve fixing of the inner supporting die 14.

S5, placing outer supporting molds 15 on the outer wall of the steel pipe 16, enabling the outer supporting molds 15 to be located on two sides or right above the portion to be shaped, adjusting the distance between the outer supporting molds 15, starting the pressing hydraulic cylinder 5, enabling the pressing hydraulic cylinder 5 to drive the upper mold base 6 to move downwards, pressing the outer supporting molds 15 between the steel pipe 16 and the mold sheets 10 of the upper mold base 6, and achieving fixing of the outer supporting molds 15.

And S6, starting the shaping hydraulic cylinder 13, driving the inner supporting die 14 to move upwards by the shaping hydraulic cylinder 13, or driving the upper die base 6 to move downwards by the pressing hydraulic cylinder 5, and shaping the local defects of the steel pipe 16. After the shaping is finished, the shaping hydraulic cylinder 13 moves downwards, the upper die base 6 moves upwards under the action of the pressing hydraulic cylinder 5, and the outer supporting die 15 is taken down.

When the depressions on the steel pipes 16 are shaped, one inner supporting die 14 is arranged, two outer supporting dies 15 are arranged, and the inner supporting die 14 is driven to move upwards through the shaping hydraulic cylinder 13 to shape the depressions. When the bulges on the shaping steel pipe 16 are formed, two inner supporting dies 14 are arranged, one outer supporting die 15 is arranged, and the upper die base 6 drives the outer supporting die 15 to move downwards to shape the bulges.

For the shaping of large thick-walled steel pipes, it is completely impossible to realize local shaping by integral deformation. The utility model discloses a pressure that props the mould outward or prop the mould in carries out local plastic to the steel pipe, need not carry out holistic deformation to the steel pipe, only need warp the steel pipe part and just can realize the local plastic of steel pipe, and the tonnage of the pneumatic cylinder of needs is little, has saved the energy, has simplified the structure, has improved the plastic effect.

And S7, starting the conveying rollers 17 and the rotating rollers 18 to drive the steel pipe 16 to continuously move and rotate until the next part to be shaped moves to the position right above the lower die holder 7. And (5) repeating the steps S3-S6 to shape the next part to be shaped in sequence until the shaping of the whole steel pipe 16 is completed.

Plastic equipment be applicable to the internal diameter of steel pipe and be not less than 508mm, the wall thickness is not less than 10 mm's large-scale thick wall steel pipe.

Therefore, the utility model adopts the above structure local plastic equipment of large-scale steel pipe can solve the local difficult plastic problem of large-scale steel pipe, has simple structure, convenient to use's advantage.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand that: the technical solution of the present invention can still be modified or replaced with equivalents, and these modifications or replacements do not make the modified technical solution depart from the spirit and scope of the technical solution of the present invention.

Claims (9)

1. The utility model provides a local plastic equipment of large-scale steel pipe which characterized in that: the steel pipe shaping machine comprises a shaping machine, wherein conveying mechanisms for conveying steel pipes are arranged on two sides of the shaping machine, and the shaping machine and the conveying mechanisms are positioned on the same straight line; the shaping machine comprises a base, wherein a cross beam is arranged above the base, a power element for driving the cross beam to move up and down along an upright post is arranged on the base, and the upright post is fixed on the base; the crossbeam is provided with a moving element for driving the upper die base to move, the base is provided with a lower die base matched with the upper die base, dies for placing steel pipes are arranged on the upper die base and the lower die base, a local inner shaping structure of the steel pipes is arranged in the steel pipes, and a local outer shaping structure of the steel pipes is arranged between the steel pipes and the dies of the upper die base.

2. The local shaping equipment for the large steel pipe according to claim 1, wherein the local shaping equipment comprises: the power element is a jacking hydraulic cylinder, the jacking hydraulic cylinder is fixed on the base, and a telescopic rod of the jacking hydraulic cylinder is fixedly connected with the cross beam; through holes for the upright posts to pass through are formed in the two ends of the cross beam, and the cross beam is connected with the upright posts in a sliding mode.

3. The local shaping equipment for the large steel pipe according to claim 1, wherein the local shaping equipment comprises: the moving element is a pressing hydraulic cylinder, the pressing hydraulic cylinder is fixed on the cross beam, and a telescopic rod of the pressing hydraulic cylinder is fixedly connected with the upper die base.

4. The local shaping equipment for the large steel pipe according to claim 1, wherein the local shaping equipment comprises: a semicircular upper die frame is arranged on the lower surface of the upper die holder, a semicircular lower die frame is arranged on the upper surface of the lower die holder, and the die sheet is fixed on the upper die frame and the lower die frame through bolts; a plurality of stiffened plates are uniformly arranged between the upper die frame and the upper die base, and a plurality of stiffened plates are uniformly arranged between the lower die frame and the lower die base.

5. The local shaping equipment for the large steel pipe according to claim 1, wherein the local shaping equipment comprises: the local internal shaping structure comprises a shaping hydraulic cylinder, a supporting seat is arranged at the bottom of the shaping hydraulic cylinder, the lower surface of the supporting seat is an arc surface matched with the inner wall of the steel pipe, and an internal supporting die is arranged on a telescopic rod of the shaping hydraulic cylinder.

6. The local shaping equipment for the large steel pipe according to claim 5, wherein the local shaping equipment comprises: the top surface of the inner supporting die is a cambered surface matched with the inner wall of the steel pipe.

7. The local shaping equipment for the large steel pipe according to claim 1, wherein the local shaping equipment comprises: the local outer shaping structure comprises an outer supporting die, and the lower surface of the outer supporting die is provided with a cambered surface matched with the outer wall of the steel pipe.

8. The local shaping equipment for the large steel pipe according to claim 1, wherein the local shaping equipment comprises: the conveying mechanisms are symmetrically arranged on two sides of the shaping machine and comprise a plurality of conveying rollers, the steel pipes are positioned above the conveying rollers, rotating rollers are arranged between the conveying rollers, and the rotating directions of the rotating rollers are perpendicular to the rotating directions of the conveying rollers; two rollers of the rotating roller are symmetrically arranged on two sides of the steel pipe.

9. The local shaping equipment for the large steel pipe according to claim 1, characterized in that: the inner diameter of the steel pipe is not less than 508mm, and the wall thickness is not less than 10mm.

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