CN115026508A

CN115026508A - Box steel displacement device and box steel manufacturing method

Info

Publication number: CN115026508A
Application number: CN202210741665.2A
Authority: CN
Inventors: 张超; 舒亮亮; 王兆权; 翟方
Original assignee: China 19th Metallurgical Group Co ltd
Current assignee: China 19th Metallurgical Group Co ltd
Priority date: 2022-06-28
Filing date: 2022-06-28
Publication date: 2022-09-09

Abstract

The invention discloses a box-type steel displacement device and a box-type steel manufacturing method, belongs to the field of welding, and aims to reduce displacement impact. Comprises a base, wherein a track is arranged on the base; a main transmission pedestal is arranged at one end of the base along the transverse direction of the base, and a driven pedestal is arranged at the other end of the base; the main transmission pedestal and the driven pedestal are movably matched and connected with the track along the extending direction of the track; the inner side of the main transmission pedestal is movably provided with a first connecting seat for installing one end of the box section steel, the inner side of the driven pedestal is movably provided with a second connecting seat for installing the other end of the box section steel, and the first connecting seat and the second connecting seat are arranged oppositely and are provided with a driving mechanism for driving the first connecting seat to rotate. The welding line to be welded can be adjusted to the best welding station facing the welding worker, and the welding line quality is improved. Moreover, the box-type steel does not need to be placed down after being turned in place, so that the impact phenomenon caused by frequent turning is avoided, and the box-type steel is smoothly shifted.

Description

Box-shaped steel position changing device and box-shaped steel manufacturing method

Technical Field

The invention belongs to the field of auxiliary welding supports, and particularly relates to a box-type steel displacement device and a box-type steel manufacturing method.

Background

In the construction of steel structures, box steel is a common component. Especially in modern large-scale steel structure engineering, because of the continuous innovation of design, the molding is abundantly increased day by day, and the application of box steel is more and more. The box-shaped steel is formed by splicing four steel plates, and the shape of the box-shaped steel is square. When the box section steel is manufactured, firstly, four steel plates are spliced and formed in a spot welding mode under the assistance of an inner supporting positioning plate; and then welding the abutted seams between two adjacent steel plates. The traditional welding mode is as follows: the box-shaped steel formed by spot welding is placed on the ground or a supporting table, a worker holds a welding gun for welding, and in the welding process, a travelling crane or a crane is adopted to turn over the component back and forth in order to prevent welding deformation. The conventional approach has the following drawbacks:

firstly, the component is overturned back and forth by a crane or a crane, so that the cost of mechanical equipment is increased, large mechanical impact exists, and not only is a small safety risk existing.

Secondly, after the box-shaped steel is turned over, the box-shaped steel is placed on the ground or a supporting table, when a worker is in a conventional standing position, the side face of the box-shaped steel is opposite to the worker, and the position of a welding seam is obliquely above or below and is not the optimal welding position.

Thirdly, the welding workload of the seam welding is large, the welding position is caused to bring great challenges to welders, the welders need to bend over to squat down or even lie down to weld, and huge physical energy is consumed.

Disclosure of Invention

The invention aims to solve the impact problem in the box steel turning process at present, and provides a box steel shifting device, which reduces the impact on a steel box girder and realizes the smooth stability of box steel shifting.

The technical scheme adopted by the invention is as follows: the box-type steel displacement device comprises a base, wherein a track transversely arranged along the base is arranged on the base;

a main transmission pedestal is arranged at one end of the base along the transverse direction of the base, and a driven pedestal is arranged at the other end of the base; the main transmission pedestal and the driven pedestal are movably matched and connected with the track along the extending direction of the track, a first locking structure for locking the position of the main transmission pedestal is arranged between the main transmission pedestal and the track, and a second locking structure for locking the position of the driven pedestal is arranged between the driven pedestal and the track;

the inner side of the main transmission pedestal is movably provided with a first connecting seat for installing one end of the box section steel, the inner side of the driven pedestal is movably provided with a second connecting seat for installing the other end of the box section steel, and the first connecting seat and the second connecting seat are arranged oppositely and are provided with a driving mechanism for driving the first connecting seat to rotate.

Furthermore, the first connecting seat and the second connecting seat both comprise chucks, a plurality of hydraulic telescopic clamping jaws which are uniformly distributed around the center of the chucks are arranged on the front faces of the chucks, and the surrounding areas of the inner ends of the clamping jaws form a workpiece mounting area;

the driving mechanism is a driving motor arranged in the main transmission pedestal; and the chuck of the first connecting seat is in transmission connection with a driving motor in the main transmission pedestal through a transmission shaft.

Furthermore, a bracket which is passively and rotatably supported in the middle of the box-shaped steel and can lift vertically is arranged between the first connecting seat and the second connecting seat, and the bracket is movably matched and connected with the rail along the extending direction of the rail.

Further, the bracket comprises a bracket, a clamp and a support capable of being lifted vertically;

the clamp is in a copper coin shape with an outer circle and an inner square, and a square hole in the center of the clamp is matched with the box-type steel;

the bracket is movably supported on the support along the vertical direction, and the outer circumferential surface of the clamp is passively and rotatably supported on the bracket.

Furthermore, the clamp comprises two clamp blocks which are oppositely arranged, the clamp blocks are semicircular and comprise semicircular arc-shaped surfaces and plane-shaped splicing surfaces along the peripheries of the clamp blocks, and an inwards-concave square groove is formed in the center of each splicing surface; the splicing surfaces of the two clamping blocks are overlapped, detachably spliced and the square grooves are spliced into the square holes.

Furthermore, two sides of the square groove on the splicing surface are respectively provided with an inward concave pin hole; the pin holes of the two clamping blocks are spliced to form a lock hole, a lock pin matched with the lock hole is arranged, and the two clamping blocks are spliced together by being inserted into the lock hole through the lock pin.

Further, along the axial direction of the square hole, the surface of one side of the clamp is a front surface, and the surface of the other side of the clamp is a back surface;

the pin hole of the lock hole at one side of the square hole is in a conical shape which is gradually reduced from the front surface of the clamp to the back surface of the clamp; the pin hole of the lock hole at the other side of the square hole is in a conical shape which is gradually enlarged from the front surface of the clamp to the back surface of the clamp.

Further, the bracket comprises a chassis and a pair of supporting wheels arranged on the top surface of the chassis, and the axis of each supporting wheel is parallel to the assembly axis formed by the first connecting seat and the second connecting seat; the clamp is passively and rotatably supported between a pair of riding wheels.

Further, be provided with the operation panel that has the ladder step between main drive pedestal and the bracket that closes on the main drive pedestal, between driven pedestal and the bracket that closes on the driven pedestal and between the adjacent bracket respectively, the bottom of operation panel be provided with the spout of track adaptation, track and spout joint.

The method for welding the box-type steel by adopting the box-type steel displacement device comprises the following steps of:

step one, assembling a box-shaped steel displacement device, separating two clamping blocks, placing the splicing surface of one clamping block on a bracket upwards, and adjusting the clamping blocks, a first connecting seat and a second connecting seat to be centered;

secondly, hoisting the box-shaped steel which is assembled in advance into the square groove of the clamping block;

step three, clamping the box-shaped steel by using the first connecting seat and the second connecting seat;

step four, covering another clamping block, and splicing the two clamping blocks together;

step five, driving the first connecting seat to rotate until the to-be-welded seam of the box-shaped steel is positioned at the top end;

and step six, welding the abutted seams to be welded.

The invention has the beneficial effects that: through setting up main drive pedestal and driven pedestal, the welding station that the rotation transform welding seam that realizes box-shaped steel of drive connecting seat one was located to can adjust the welding seam that waits to weld to just to welding workman's best welding station, do benefit to and improve the welding seam quality. Moreover, the box-type steel does not need to be placed down after being turned in place, so that the impact phenomenon caused by frequent turning is avoided, the box-type steel is smoothly shifted, the safety risk brought to personnel and equipment is reduced, the procedures are also saved, and the whole welding time is saved.

The mounting height of the box-shaped steel is increased, compared with the situation that the box-shaped steel is directly placed on the base, welding stations such as stooping, squatting or lying and the like of a welder can be reduced or even avoided, the welder can conveniently weld the box-shaped steel in the height and posture most suitable for human engineering, the working efficiency is improved, and the welding quality is ensured.

Through main drive pedestal and driven pedestal and track clearance fit to the interval between adjustable connecting seat one and the connecting seat two, with the box steel that adapts to different length, adaptability improves.

Set up the bracket between main drive pedestal and the driven pedestal and carry out passive rotation support to the box steel, prevented box steel downwarping, protected whole box steel device that shifts.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the main drive stage/slave stage configuration;

FIG. 3 is a schematic view of a bracket structure;

fig. 4 is a schematic view of a clamp block structure.

In the figure, a base 1, a rail 2, a main transmission pedestal 3, a driven pedestal 4, a first connecting seat 5, a chuck 5A, a clamping jaw 5B, a workpiece mounting area 5C, a second connecting seat 6, a bracket 7, a support 7A, a bracket 7B, a chassis 7B1, a riding wheel 7B2, a clamp 7C, a clamping block 7C1, an arc-shaped surface 7C11, a splicing surface 7C12, a square groove 7C13, a pin hole 7C14, a square hole 7C2, a lock hole 7C3, a lock pin 7C4, box-shaped steel 8, an operating platform 9 and a slide groove 9A are arranged.

Detailed Description

The invention is further described below with reference to the following figures and examples:

a box-type steel displacement device, as shown in fig. 1, comprising a base 1, wherein a track 2 arranged along the base 1 in the transverse direction is arranged on the base 1; a main transmission pedestal 3 is arranged at one end of the base 1 along the transverse direction of the base 1, and a driven pedestal 4 is arranged at the other end of the base 1; the main transmission pedestal 3 and the driven pedestal 4 are movably matched and connected with the track 2 along the extending direction of the track 2, a locking structure I for locking the position of the main transmission pedestal 3 is arranged between the main transmission pedestal 3 and the track 2, and a locking structure II for locking the position of the driven pedestal 4 is arranged between the driven pedestal 4 and the track 2;

a first connecting seat 5 used for installing one end of the box section steel 8 is movably installed on the inner side of the main transmission pedestal 3, a second connecting seat 6 used for installing the other end of the box section steel 8 is movably installed on the inner side of the driven pedestal 4, the first connecting seat 5 and the second connecting seat 6 are arranged oppositely, and a first driving mechanism for driving the first connecting seat 5 to rotate is arranged.

According to the box-type steel displacement device disclosed by the invention, the main transmission pedestal 3 and the driven pedestal 4 are arranged, so that the mounting height of the box-type steel 8 is increased, and compared with the case-type steel 8 which is directly placed on the base 1, welding stations such as stooping, squatting or lying and the like of a welder can be reduced or even avoided.

As shown in fig. 2, a first connecting seat 5 is installed on the main transmission pedestal 3, the first connecting seat 5 is used for one end of the box-shaped steel 8, a second connecting seat 6 is installed on the driven pedestal 4, and the second connecting seat 6 is used for the other end of the box-shaped steel 8, so that the box-shaped steel 8 is relatively supported through the first connecting seat 5 and the second connecting seat 6. The first connecting seat 5 and the second connecting seat 6 are arranged oppositely, that is, the height positions of the first connecting seat and the second connecting seat are the same, and the positions of the first connecting seat and the second connecting seat are the same on a horizontal plane, and the central connecting line of the first connecting seat and the second connecting seat is vertical to the first connecting seat 5 and the second connecting seat 6. This setting for box section steel 8 is installed between connecting seat one 5 and connecting seat two 6 after, and box section steel 8 is in the horizontality, more does benefit to workman station position and welds.

The "inner" and "outer" directions in the present invention indicate relative positional relationships, and the side facing the mounting region of the box section steel 8 is the "inner" and the side facing away from the mounting region of the box section steel 8 is the "outer" relatively.

The connecting seat i 5 is movably mounted on the inner side of the main transmission pedestal 3, which means that the connecting seat i 5 is supported on the inner side of the main transmission pedestal 3, and the connecting seat i 5 can rotate around the axis thereof. The difference between the connecting seat two 6 and the driven pedestal 4 is that the connecting seat one 5 is driven by the driving mechanism to rotate, the torsion force of the connecting seat one 5 is transmitted to the box-shaped steel 8 by the connecting seat two 6, and then is transmitted to the connecting seat two 6 by the box-shaped steel 8, and the connecting seat two 6 rotates along with the rotation.

Through connecting seat one 5 movable mounting in the inboard of final drive pedestal 3, connecting seat two 6 movable mounting in the inboard of driven pedestal 4, can rotate the welding station that the rotation transform welding seam that realizes box-shaped steel 8 locates through drive connecting seat one 5, each welding seam is all 360 rotatory promptly to can adjust the welding seam of waiting to weld to just to executing the best welding station of welding the workman, do benefit to and improve the welding seam quality. Moreover, the box-type steel 8 does not need to be placed down after being turned in place, so that the impact phenomenon caused by frequent turning is avoided, the safety risk brought to personnel and equipment is reduced, the working procedures are saved, and the whole welding time is saved.

Through final drive pedestal 3 and driven pedestal 4 and 2 clearance fits of track to interval between adjustable connecting seat one 5 and the connecting seat two 6, with the box-type steel 8 that adapts to different length, adaptability improves.

One rail 2 of the base 1 may be provided, but in order to ensure the smoothness of the movement of the main transmission pedestal 3 and the driven pedestal 4, two rails 2 parallel to each other are provided. When main drive pedestal 3 moves along track 2 and targets in place the back, through the position of locking main drive pedestal 3 of locking structure one, avoid main drive pedestal 3 to remove. Locking structure one can adopt the multiform, as long as can satisfy the position of locking final drive pedestal 3 can, if, can be through setting up the spacer pin at final drive pedestal 3 between base 1, also can set up the wheel that takes brake equipment in the 3 bottoms of final drive pedestal and move on the track, play limiting displacement through brake equipment. The locking structure is also the same.

Can adopt one section and the square sleeve pipe welding of 8 adaptations of box steel as connecting seat one 5 or connecting seat two 6 on the chuck, during the use, 8 pegs graft in square sheathed tube square hole of box steel, and it is spacing each other between square hole and the box steel 8. However, only one specification of box steel 8 can be used. In the invention, the first connecting seat 5 and the second connecting seat 6 both comprise chucks 5A, a plurality of hydraulic telescopic clamping jaws 5B which are uniformly distributed around the centers of the chucks 5A are arranged on the front surfaces of the chucks 5A, and the surrounding areas of the inner ends of the clamping jaws 5B form a workpiece mounting area 5C.

When the device is installed, firstly, the clamping jaw 5B retracts; then, inserting the end of the box-shaped steel 8 into the workpiece mounting area 5C; the jaws 5B are then extended by the same length until they grip the end of the box section steel 8. The connecting seat I5 and the connecting seat II 6 of this form are easy to operate, can stabilize and clamp the box-shaped steel 8, and can adjust according to the overall dimension of the box-shaped steel 8, and the applicability is better.

The driving mechanism can be independently installed outside the main transmission pedestal 3, and in order to improve the compactness of the structure and save space, preferably, the driving mechanism is a driving motor arranged in the main transmission pedestal 3; and the chuck 5A of the connecting seat I5 is in transmission connection with a driving motor in the main transmission pedestal 3 through a transmission shaft.

The main transmission pedestal 3 can be processed into a shell by a metal steel plate, a steel framework is arranged in the shell, a driving motor, a bearing, a speed reducer and the like are erected on the steel framework, and steel wheels are arranged at the bottom of the main transmission pedestal 3 and used as walking wheels to walk on a track.

The driven stage 4 is also the only thing, but the driven stage 4 is not provided with a drive motor, a bearing, a speed reducer, and the like.

In order to support the box-type steel 8 in the middle of the box-type steel 8 and prevent the box-type steel 8 from being warped downwards, preferably, as shown in fig. 3, a bracket 7 which is passively and rotatably supported in the middle of the box-type steel 8 and can be lifted up and down is arranged between the first connecting seat 5 and the second connecting seat 6, and the bracket 7 is movably connected with the rail 2 along the extending direction of the rail 2 in a matched manner.

Passive rotation support means that bracket 7 provides an ascending support power in 8 middle parts of box steel, prevents 8 downwarping of box steel, and simultaneously, can also guarantee that 8 can be rotatory under driving about of connecting seat 5 of box steel.

The head of the bracket 7 can be arc-shaped and matched with the circumcircle of the box-shaped steel 8, so that the box-shaped steel 8 can be supported, and the rotation of the box-shaped steel 8 cannot be prevented. However, in this structure, the box-shaped steel 8 is in line contact with the head of the bracket 7, and the box-shaped steel 8 may be locally deformed by pressing.

The bracket 7 can be lifted to adjust the height as required. The bracket 7 can adopt various lifting structures, such as a hydraulic cylinder, a screw rod, a sleeve matched with the screw rod in a threaded manner, a jack and the like.

In the invention, the bracket 7 comprises a bracket 7B, a clamp 7C and a support 7A which can be lifted vertically; the clamp 7C is in a copper coin shape with an outer circle and an inner square, and a square hole 7C2 in the center of the clamp is matched with the box-shaped steel 8; the bracket 7B is movably supported on the support 7A along the vertical direction, and the outer circumferential surface of the clamp 7C is passively and rotatably supported on the bracket 7B.

The box-shaped steel 8 is inserted into the square hole 7C2 of the jig 7C, and the outer circumferential surface of the jig 7C is supported on the bracket 7B and rotated on the bracket 7B. The box steel 8 is in surface contact with the clamp 7C, and local extrusion to the box steel 8 is eliminated. The periphery of the clamp 7C is circular, so that the clamp is convenient to rotate. The supporting force of the bracket 7B to the jig 7C is more uniformly transmitted.

If the clamp 7C is of an integral cylindrical and inner square structure, when the clamp is used, the clamp 7C needs to be installed on the box-shaped steel 8 firstly, and then the two ends of the box-shaped steel 8 are installed between the first connecting seat 5 and the second connecting seat 6. For the case section steel 8 of a large size, the operation manner is extremely inconvenient here. In order to avoid this problem, in the present invention, the clamp 7C is of a split structure, that is, the clamp 7C includes two oppositely disposed clamping blocks 7C1, as shown in fig. 4, the clamping block 7C1 is semicircular, and includes a semicircular arc surface 7C11 and a planar splicing surface 7C12 along its outer periphery, and a concave square groove 7C13 is provided at the center of the splicing surface 7C 12; the splicing surfaces 7C12 of the two clamping blocks 7C1 are overlapped and detachably spliced, and the square grooves 7C13 are spliced into square holes 7C2 matched with box-shaped steel.

This anchor clamps 7C of split type structure, owing to form by the splice of the clamp splice 7C1 of two relative settings, during the installation, can install bracket 7B with one of them clamp splice 7C1 earlier, place clamp splice 7C 1's square groove 7C13 with box-shaped steel 8 in again, cover another clamp splice 7C1 at last, the installation is more convenient easy.

An ear seat can be arranged between the two clamping blocks 7C1 on the side surface and is assembled together through connecting bolts. In the invention, preferably, pin holes 7C14 which are recessed inwards are respectively arranged on the splicing surface 7C12 and positioned on two sides of the square groove 7C 13; the pin holes of the two clamping blocks 7C1 are spliced to form a lock hole 7C3, a lock pin 7C4 matched with the lock hole 7C3 is arranged, and the two clamping blocks 7C1 are spliced together by being inserted into the lock hole 7C3 through the lock pin 7C 4.

The pin holes 7C14 at the two ends of the lock hole 7C3 are connected together through a transition channel, the width of the transition channel is smaller than that of the pin hole 7C14, namely a limit step is formed between the pin hole 7C14 and the transition channel, the lock pin 7C4 is inserted into the lock hole 7C3, and the step of the lock hole 7C3 and the step of the lock pin 7C4 are limited mutually, so that the two clamping blocks 7C1 are spliced together and cannot be separated along the radial direction.

In order to play a role in limiting along the axial direction of the square hole 7C2 and avoid the two clamping blocks 7C1 from separating along the axial direction, preferably, along the axial direction of the square hole 7C2, the surface of one side of the clamp 7C is a front surface, and the surface of the other side is a back surface;

the pin hole 7C14 of the lock hole 7C3 on the side of the square hole 7C2 is tapered so as to gradually decrease from the front surface of the clip 7C to the rear surface thereof; the pin hole 7C14 of the locking hole 7C3 on the other side of the square hole 7C2 is tapered so as to gradually expand from the front surface to the rear surface of the clip 7C.

In order to overcome the problem that the bracket 7B has a circular arc shape but has a large contact area with the clamp 7C and a large frictional resistance, which is not beneficial to the rotation of the clamp 7C, it is preferable that the bracket 7B comprises a chassis 7B1 and a pair of supporting rollers 7B2 arranged on the top surface of the chassis 7B1, and the axis of the supporting roller 7B2 is parallel to the assembly axis formed by the connecting seat one 5 and the connecting seat two 6; the clamp 7C is passively supported between a pair of idlers 7B2 in a rotating manner.

In order to further improve the convenience that the workman executed the welding, guarantee the reasonable easy operability of welding station, be provided with the operation panel 9 that has the ladder step between main drive pedestal 3 and the bracket 7 that closes on main drive pedestal 3, between driven pedestal 4 and the bracket 7 that closes on driven pedestal 4 and between the adjacent bracket 7 respectively, the bottom of operation panel 9 is provided with the spout 9A with track 2 adaptation, track 2 and spout 9A joint.

The operation table 9 is connected with the rail 2 in a clamping mode through the sliding groove 9A, the installation stability of the operation table 9 is guaranteed, the operation table 9 is convenient to install and detach, the sliding groove 9A is in sliding fit with the rail 2, and the position of the operation table 9 can be adjusted along the rail as required.

The operation table 9 is convenient for welding workers to perform welding operation at the height and posture most suitable for human engineering, improves the working efficiency and ensures the welding quality.

The method for welding the box-shaped steel by adopting the box-shaped steel displacement device comprises the following steps:

step one, assembling a box-shaped steel displacement device, separating two clamping blocks 7C1, placing a splicing surface 7C12 of one clamping block 7C1 on a bracket 7B upwards, and adjusting the clamping blocks 7C1, a first connecting seat 5 and a second connecting seat 6 to be centered;

secondly, hoisting the box-shaped steel 8 which is assembled initially into a square groove 7C13 of a clamping block 7C 1;

step three, clamping the box section steel 8 by using a first connecting seat 5 and a second connecting seat 6;

step four, covering another clamping block 7C1, and splicing the two clamping blocks 7C1 together;

step five, driving the first connecting seat 5 to rotate until the to-be-welded seam of the box section steel 8 is positioned at the top end;

and step six, welding the abutted seams to be welded.

In the method, the seam to be welded of the box section steel 8 is positioned at the top end, namely right above, and the seam to be welded is positioned at the optimal welding position.

During welding, when a certain section of a to-be-welded seam is welded, the corresponding section of the other symmetrical to-be-welded seam needs to be welded, and at the moment, the box-shaped steel 8 can be rotated to adjust the to-be-welded seam to the optimal welding station, so that the operation of a welder is facilitated; and repeating the steps until all welding is finished.

Flaw detection is carried out after welding to check the quality of welding seams, and if defects exist, reworking is carried out in time until the welding seams are qualified; by adopting the box-type steel displacement device to transform the 8-direction coordinate welding seam nondestructive inspection of the box-type steel, the working efficiency is greatly improved.

The initially spliced box section steel 8 means that four steel plates are spot-welded and spliced to form the box section steel 8, and a continuous welding seam is not formed. Lift at the middle part of box steel 8 through one of them clamp splice 7C1, then be connected with connecting seat one 5, connecting seat two 6 respectively with the both ends end of box steel 8, reduced box steel 8 because of the moment of downwarping to both sides connecting seat one 5, connecting seat two 6, make box steel 8's installation simpler, the centre gripping is more reliable.

Claims

1. Case shaped steel device that shifts, its characterized in that: comprises a base (1), wherein a track (2) which is transversely arranged along the base (1) is arranged on the base (1);

a main transmission pedestal (3) is arranged at one end of the base (1) along the transverse direction of the base (1), and a driven pedestal (4) is arranged at the other end of the base (1); the main transmission pedestal (3) and the driven pedestal (4) are movably connected with the track (2) in a matched manner along the extending direction of the track (2), a locking structure I for locking the position of the main transmission pedestal (3) is arranged between the main transmission pedestal (3) and the track (2), and a locking structure II for locking the position of the driven pedestal (4) is arranged between the driven pedestal (4) and the track (2);

a first connecting seat (5) used for installing one end of the box section steel (8) is movably installed on the inner side of the main transmission pedestal (3), a second connecting seat (6) used for installing the other end of the box section steel (8) is movably installed on the inner side of the driven pedestal (4), the first connecting seat (5) and the second connecting seat (6) are arranged oppositely, and a first driving mechanism for driving the first connecting seat (5) to rotate is arranged.

2. The box-type steel displacement device according to claim 1, characterized in that: the connecting seat I (5) and the connecting seat II (6) both comprise chucks (5A), a plurality of hydraulic telescopic clamping jaws (5B) which are uniformly distributed around the centers of the chucks (5A) are arranged on the front surfaces of the chucks (5A), and the surrounding areas of the inner ends of the clamping jaws (5B) form a workpiece mounting area (5C);

the driving mechanism is a driving motor arranged in the main transmission pedestal (3); the chuck (5A) of the connecting seat I (5) is in transmission connection with a driving motor in the main transmission pedestal (3) through a transmission shaft.

3. The box-type steel displacement apparatus as claimed in any one of claims 1 to 2, wherein: a bracket (7) which is used for carrying out passive rotation supporting in the middle of the box steel (8) and can lift vertically is arranged between the first connecting seat (5) and the second connecting seat (6), and the bracket (7) is movably matched and connected with the rail (2) along the extending direction of the rail (2).

4. The box-type steel displacement device according to claim 3, wherein: the bracket (7) comprises a bracket (7B), a clamp (7C) and a support (7A) capable of vertically lifting;

the clamp (7C) is in a copper coin shape with an outer circle and an inner square, and a square hole (7C2) in the center of the clamp is matched with the box-shaped steel (8);

the bracket (7B) is movably supported on the support (7A) along the vertical direction, and the outer circumferential surface of the clamp (7C) is passively and rotatably supported on the bracket (7B).

5. The box-type steel displacement device according to claim 4, wherein: the clamp (7C) comprises two oppositely arranged clamping blocks (7C1), the clamping blocks (7C1) are semicircular, semicircular arc-shaped surfaces (7C11) and plane-shaped splicing surfaces (7C12) are arranged along the peripheries of the clamping blocks, and an inwards-recessed square groove (7C13) is formed in the center of each splicing surface (7C 12); the splicing surfaces (7C12) of the two clamping blocks (7C1) are overlapped and detachably spliced, and the square grooves (7C13) are spliced into the square holes (7C 2).

6. The box-type steel displacement apparatus according to claim 5, wherein: two sides of the square groove (7C13) on the splicing surface (7C12) are respectively provided with an inward-recessed pin hole (7C 14); the pin holes of the two clamping blocks (7C1) are spliced to form a lock hole (7C3), a lock pin (7C4) matched with the lock hole (7C3) is arranged, and the two clamping blocks (7C1) are spliced together by being inserted into the lock hole (7C3) through the lock pin (7C 4).

7. The box-type steel displacement device according to claim 6, characterized in that: along the axial direction of the square hole (7C2), the surface of one side of the clamp (7C) is a front surface, and the surface of the other side of the clamp is a back surface;

the pin hole (7C14) of the lock hole (7C3) at one side of the square hole (7C2) is in a tapered shape gradually reduced from the front surface of the clamp (7C) to the back surface thereof; the pin hole (7C14) of the lock hole (7C3) on the other side of the square hole (7C2) is in a tapered shape gradually expanding from the front surface to the back surface of the clamp (7C).

8. The box-type steel displacement device according to claim 7, wherein: the bracket (7B) comprises a chassis (7B1) and a pair of riding wheels (7B2) arranged on the top surface of the chassis (7B1), and the axis of the riding wheels (7B2) is parallel to the assembly axis formed by the first connecting seat (5) and the second connecting seat (6); the clamp (7C) is passively and rotatably supported between a pair of riding wheels (7B 2).

9. The box-type steel displacement device according to claim 3, wherein: an operating platform (9) with ladder steps is respectively arranged between the main transmission pedestal (3) and the bracket (7) close to the main transmission pedestal (3), between the driven pedestal (4) and the bracket (7) close to the driven pedestal (4) and between the adjacent brackets (7), a sliding groove (9A) matched with the rail (2) is arranged at the bottom of the operating platform (9), and the rail (2) is clamped with the sliding groove (9A).

10. The method for welding the box-type steel by using the box-type steel displacement device as claimed in any one of claims 5 to 8, wherein the method comprises the following steps: the method comprises the following steps:

step one, assembling a box-type steel displacement device, separating two clamping blocks (7C1), placing a splicing surface (7C12) of one clamping block (7C1) on a bracket (7B) upwards, and adjusting the clamping block (7C1), a first connecting seat (5) and a second connecting seat (6) to be centered;

secondly, hoisting the box section steel (8) which is assembled initially into a square groove (7C13) of a clamping block (7C 1);

step three, clamping the box-shaped steel (8) by using the first connecting seat (5) and the second connecting seat (6);

step four, covering another clamping block (7C1), and splicing the two clamping blocks (7C1) together;

step five, driving the first connecting seat (5) to rotate until the to-be-welded abutted seam of the box section steel (8) is positioned at the top end;

and step six, welding the abutted seams to be welded.