CN219746880U - Steel pipe welding auxiliary device - Google Patents

Abstract

The utility model discloses a steel pipe welding auxiliary device, which comprises: the device comprises a supporting structure, a movable connecting structure, a first fixed connecting structure and a second fixed connecting structure; the support structure is in a cylinder shape, the movable connecting structure moves along the circumferential direction of the support structure at the movable connecting hole of the support structure, and a first movable pressing part for pressing the first steel pipe is arranged on the movable connecting structure; the first fixed connection structure avoids swing joint hole fixed connection in bearing structure's side, is equipped with the second activity that is used for propping up tight second steel pipe on the first fixed connection structure and supports the pressure portion, and first fixed connection structure still can dismantle in the place that deviates from the second steel pipe and be connected with second fixed connection structure, is equipped with the third activity that is used for propping up tight third steel pipe on the second fixed connection structure and supports the pressure portion, and third steel pipe sets up with the second steel pipe is perpendicular. The utility model can finish the butt welding of two steel pipes at right angles and other steel pipes at right angles or other angles.

Description

Steel pipe welding auxiliary device

Technical Field

The embodiment of the utility model relates to the technical field of steel pipe welding, in particular to a steel pipe welding auxiliary device.

Background

Generally, in the process of welding steel pipes, the butt joint of the steel pipes is difficult, the position change easily occurs in the process of welding two steel pipes, the welding is inconvenient or the final welding effect is poor, and the stability of a frame after the steel pipes are welded is affected, so that an auxiliary device for welding the steel pipes is needed to fix the positions of the two steel pipes after the butt joint and finish the welding.

In practice, two steel pipes are butt-welded at right angles or at other angles in the welding process, and it is difficult for one steel pipe auxiliary device in the prior art to finish the butt joint of two steel pipes at right angles simultaneously and at right angles or other angles with other steel pipes.

Disclosure of Invention

The embodiment of the utility model solves the problem that in the prior art, one steel pipe auxiliary device is difficult to finish butt welding of right angles or other angles of a plurality of steel pipes at the same time by providing the steel pipe welding auxiliary device.

The embodiment of the utility model provides a steel pipe welding auxiliary device, which comprises: the device comprises a supporting structure, a movable connecting structure, a first fixed connecting structure and a second fixed connecting structure; the support structure is configured as a cylinder, a movable connecting hole is formed in the support structure along the circumferential direction of the side face of the cylinder, the movable connecting structure moves along the circumferential direction of the support structure at the movable connecting hole, a first movable pressing part is arranged on the movable connecting structure, and the first movable pressing part is close to or far away from the support structure and is used for propping up a first steel pipe; the first fixed connection structure is fixedly connected to the side face of the supporting structure, the first fixed connection structure avoids the movable connection hole, a second movable pressing part is arranged on the first fixed connection structure, and the second movable pressing part is close to or far away from the supporting structure and is used for propping up a second steel pipe; the first fixed connection structure is further detachably connected with a second fixed connection structure at a placement position deviating from the second steel pipe, a third movable pressing part is arranged on the second fixed connection structure, the third movable pressing part moves towards a side extension surface close to or far away from the supporting structure and is used for propping up a third steel pipe, and the third steel pipe and the second steel pipe are vertically arranged.

In some embodiments, the movable connection structure comprises a movable connection plate and a movable part, the movable connection plate is fixedly connected with the movable part, and the movable part is movably connected with the support structure at the movable connection hole; the movable connecting plate is also fixedly connected with a first supporting plate, the first supporting plate is connected with a first movable pressing part, and the first movable pressing part moves towards one end close to or far away from the movable connecting plate and is used for pressing a first steel pipe.

In some embodiments, the movable component includes a limit portion, a fastening portion, and a first connection portion; one end of the first connecting portion is connected in the inner angle of the movable connecting plate, the other end of the first connecting portion extends into the supporting structure through the movable connecting hole, the first connecting portion located in the supporting structure is in threaded connection with a fastening portion and a limiting portion, and the fastening portion is close to the inner wall of the supporting structure.

In some embodiments, the first movable abutment comprises a first screw, a first nut, and a first tightening end; the first nut is fixed in the first backup pad, the first nut with first screw rod threaded connection, first screw rod is close to the one end of movable connection board is equipped with first tight end that pushes up, first screw rod is movable to be close to movable connection board department, so that first tight end with first steel pipe supports the pressure.

In some embodiments, the first fixed connection structure comprises a second support plate and a fixed connection plate; the fixed connection board with bearing structure fixed connection, be connected with in the second backup pad the second activity supports the pressure portion, the second activity supports the pressure portion towards being close to or keep away from the one end of fixed connection board is movable and is used for supporting the pressure second steel pipe.

In some embodiments, the second movable abutment comprises: the device comprises a second screw rod, a second nut and a second propping end; the second nut is fixed in the second backup pad, the second nut with second screw rod threaded connection, the second screw rod is close to the one end of fixed connection board is equipped with the second and pushes up tight end, the second screw rod is movable to be close to fixed connection board department, so that the second pushes up tight end with the second steel pipe supports and presses.

In some embodiments, the second fixed connection structure includes a third support plate and a retaining plate, the retaining plate is perpendicular to the third support plate, and the third movable retaining portion moves toward or away from the retaining plate.

In some embodiments, the third movable abutment comprises a third screw, a third nut, and a third tightening end;

the third nut is fixed on the third supporting plate, the third nut is in threaded connection with the third screw rod, a third jacking end is arranged at one end, close to the blocking plate, of the third screw rod, and the third screw rod can move to the position, close to the blocking plate, so that the third jacking end is in abutting pressure with the third steel pipe.

In some embodiments, the first and second fixed connection structures are fixedly connected by a detachable plate.

In some embodiments, the support structure is provided with graduations in the circumferential direction.

One or more technical solutions provided in the embodiments of the present utility model at least have the following technical effects or advantages:

according to the embodiment of the utility model, the first fixed connection structure is fixedly connected to one side of the supporting structure, the movable connection structure is movably connected to the other side, when the steel pipe is placed, the position of the second steel pipe relative to the third steel pipe is unchanged, the third steel pipe is vertical to the second steel pipe, the second steel pipe is propped by the second movable propping part, the third steel pipe is propped by the third movable propping part, the movable connection structure is connected with the supporting structure, the movable connection structure can move along the circumferential direction of the supporting structure, the first propping part on the movable connection structure is also used for propping the first steel pipe, when the second steel pipe and the third steel pipe are fixed and vertically connected, the position of the first steel pipe can be circumferentially adjusted by the movable connection structure to adjust the angle between the first steel pipe and the second steel pipe, the right-angle welding between the first steel pipe and the second steel pipe can be adjusted, and the welding of other angles can be adjusted.

That is, the embodiment of the utility model can meet the requirement of right-angle butt welding of two steel pipes, the requirement of simultaneous right-angle butt welding of three steel pipes, the requirement of direct butt welding of two steel pipes and the requirement of other included angle welding of another steel pipe, and can meet the requirement of right-angle welding butt welding of two steel pipes and even three steel pipes, and if only the requirement of angle welding outside the right angle of one steel pipe and the other steel pipe is met, the second fixed connection structure can be disassembled or not used, so the embodiment of the utility model can simultaneously finish the right-angle butt welding of two steel pipes and the butt welding of the right angle or other angles of other steel pipes.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments of the present utility model or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the positional relationship between a steel pipe welding auxiliary device and a steel pipe in an embodiment of the present utility model;

fig. 2 is a simplified schematic diagram of a support structure of an embodiment of the present utility model.

Icon: 1-a support structure; 2-a movable connection structure; 21-a first screw; 22-a first tightening end; 23-a first nut; 24-a movable connecting plate; 25-a first handle part; 26-a first support plate; 3-a first fixed connection; 31-a second screw; 32-a second tightening end; 33-a second nut; 34-fixing the connecting plate; 35-a second handle portion; 36-a second support plate; 4-a second steel pipe; 5-a first steel pipe; 6-a fastening part; 7-a limiting part; 8-a first connection; 9-a second fixed connection; 91-a third screw; 92-a third tightening end; 93-a third nut; 94-a baffle; 95-a third handle portion; 96-a third support plate; 10-a third steel pipe; 11-a movable connecting hole; 12-scale; 13-removable plate.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the embodiments of the present utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the embodiments of the present utility model and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.

Referring to fig. 1-2, an embodiment of the present utility model provides a steel pipe welding auxiliary device, including: the device comprises a supporting structure 1, a movable connecting structure 2, a first fixed connecting structure 3 and a second fixed connecting structure 9; the supporting structure 1 is configured as a cylinder, the supporting structure 1 is provided with a movable connecting hole 11 along the lateral circumference of the cylinder, the movable connecting structure 2 moves along the circumference of the supporting structure 1 at the movable connecting hole 11, the movable connecting structure 2 is provided with a first movable pressing part, and the first movable pressing part approaches or is far away from the supporting structure 1 and is used for propping up the first steel pipe 5.

The first fixed connection structure 3 fixed connection is in the side of bearing structure 1, and the first fixed connection structure 3 avoid swing joint hole 11, is equipped with the second activity on the first fixed connection structure 3 and supports the pressure portion, and the second activity supports the pressure portion towards bearing structure 1 and is close to or keep away from, and is used for pushing up tight second steel pipe 4.

The first fixed connection structure 3 is detachably connected with a second fixed connection structure 9 at a placement position deviating from the second steel pipe 4, a third movable pressing part is arranged on the second fixed connection structure 9, the third movable pressing part moves towards a side extension surface close to or far away from the supporting structure 1 and is used for propping up a third steel pipe 10, and the third steel pipe 10 is perpendicular to the second steel pipe 4.

In practice, bearing structure 1 is hollow cylinder, the lateral wall surface fixedly connected with first fixed connection structure 3 of cylinder, the one end of first fixed connection structure 3 and the surface fixed connection of cylinder, and the other end of first fixed connection structure 3 extends towards the one end of keeping away from the cylinder, first fixed connection structure 3 and cylinder welding, be equipped with the second activity on the first fixed connection structure 3 and support the pressure portion, the second activity supports the pressure portion and can be towards being close to the cylinder or keep away from the direction regulation length of cylinder, second steel pipe 4 is located the second activity and supports between pressure portion and the cylinder near the one end of cylinder, when second activity supports pressure portion and is close to the cylinder, support second steel pipe 4 for second steel pipe 4 can keep stability when the welding.

Further, the second fixed connection structure 9 is connected to one side of the first fixed connection structure 3 and is parallel to the first fixed connection structure 3, as in fig. 1, the second steel tube 4 placed on the first fixed connection structure 3 is vertically disposed, the third steel tube 10 placed on the second fixed connection structure 9 is perpendicular to the second steel tube 4, the steel tubes are always vertically butted, the steel tube welding in the prior art is mostly at right angles, and the right angle butt welding of the second steel tube 4 and the third steel tube 10 is ensured first. In actual operation, when the first fixed connection structure 3, the movable connection structure 2 and the supporting structure 1 are about to clamp the second steel pipe 4, the first fixed connection structure, the movable connection structure 2 and the supporting structure 1 can move along the second steel pipe 4, so that the third steel pipe 10 is in butt joint with the second steel pipe 4 at a proper position, and the third movable pressing part starts to press against the third steel pipe 10, so that the positions of the second steel pipe 4 and the third steel pipe 10 are fixed.

In addition, bearing structure 1 is equipped with swing joint hole 11, swing joint hole 11 is the arc hole, swing joint structure 2 can be along the circumference of arc hole at the cylinder removal, and swing joint structure 2 is equipped with first activity and supports the pressure portion, first activity is supported and is pressed the one end that the portion is close to the cylinder and set up first steel pipe 5 between the cylinder, first activity is supported and is pressed the portion and be used for pushing up first steel pipe 5, the slant sets up between first steel pipe 5 and the second steel pipe 4, swing joint structure 2 is in swing joint hole 11 department along bearing structure 1 circumference activity can adjust the contained angle between first steel pipe 5 and the second steel pipe 4, of course the contained angle of first steel pipe 5 and second steel pipe 4 can be adjusted into the right angle under the regulation of swing joint structure 2.

Through the above analysis, for example, when three steel pipes are welded, the position of the second steel pipe 4 and the position of the third steel pipe 10 are determined, the first fixed connection structure 3, the movable connection structure 2 and the support structure 1 can be moved along the second steel pipe 4 to a position meeting the welding of the third steel pipe 10 and the second steel pipe 4, then the third steel pipe 10 and the second steel pipe 4 are accurately butted, the first movable pressing part presses the second steel pipe 4, the third movable pressing part presses the third steel pipe 10, and finally the circumferential position of the movable connection structure 2 relative to the support structure 1 is adjusted to adjust the angle between the first steel pipe 5 and the second steel pipe 4.

The embodiment of the utility model can meet the requirement of right-angle welding butt joint of two steel pipes and even three steel pipes, and can detach the second fixed connection structure 9 or not use the second fixed connection structure if only the welding at angles other than the right angle of one steel pipe and the other steel pipe is required, so that the embodiment of the utility model can finish the right-angle butt joint of two steel pipes simultaneously and the butt joint with other steel pipes at right angles or other angles, and simultaneously, the steel pipes are pressed by the first movable pressing part, the second movable pressing part and the third movable pressing part, the stability of the steel pipes is maintained, and the welding reliability between the steel pipes is enhanced.

In some embodiments, the movable connection structure 2 comprises a movable connection plate 24 and a movable part, the movable connection plate 24 is fixedly connected with the movable part, and the movable part is movably connected with the support structure 1 at the movable connection hole 11; the movable connecting plate 24 is also fixedly connected with a first supporting plate 26, a first movable pressing part is connected to the first supporting plate 26, and the first movable pressing part moves towards one end close to or far away from the movable connecting plate 24 and is used for pressing the first steel pipe 5.

In practice, the movable connection plate 24 includes a first connection plate and a second connection plate, and a right angle is formed between the first connection plate and the second connection plate, an inner angle of the right angle is in movable contact with an outer wall of the cylinder, and the first connection plate and the second connection plate can move along a circumferential direction of the cylinder at the movable connection hole 11, that is, a movable part is connected between the first connection plate and the second connection plate, the movable part stretches into the movable connection hole 11 and can move along the circumferential direction of the cylinder, the first support plate 26 is fixedly connected with the first connection plate, and the first movable pressing part on the first support plate 26 also moves along the circumferential direction of the cylinder along with the movement of the first connection plate and the second connection plate.

Specifically, the second movable pressing part on the first fixed connection structure 3 is pressed against the second steel pipe 4, and then the first connection plate and the second connection plate are rotated along the circumferential direction of the cylinder to enable the first support plate 26 to rotate along the circumferential direction of the cylinder, so that the inclination of the first steel pipe 5 between the second movable pressing part and the first connection plate is adjusted, and the angle of the butt joint position of the first steel pipe 5 and the second steel pipe 4 is adjustable.

In some embodiments, the movable part comprises a limit portion 7, a fastening portion 6 and a first connection portion 8; one end of the first connecting portion 8 is connected in an inner angle of the movable connecting plate 24, the other end of the first connecting portion 8 extends into the supporting structure 1 through the movable connecting hole 11, the first connecting portion 8 located in the supporting structure 1 is in threaded connection with the fastening portion 6 and the limiting portion 7, and the fastening portion 6 is close to the inner wall of the supporting structure 1.

Referring to fig. 2, one end of the first connecting portion 8 is welded at an inner angle formed between the first connecting plate and the second connecting plate, the first connecting portion 8 is constructed as a threaded structure, a position of the first connecting portion 8 extending into the cylinder is sleeved with a limiting portion 7 and a fastening portion 6, during actual operation, the fastening portion 6 is in threaded connection with the first connecting portion 8, the fastening portion 6 is in contact with an inner wall of the cylinder, the diameter of the fastening portion 6 is larger than the aperture of the movable connecting hole 11, when the movable connecting structure 2 rotates along the circumferential direction of the cylinder at the movable connecting hole 11, the fastening portion 6 is connected with the first connecting portion 8 and then is in movable contact with the inner wall of the cylinder, the fastening portion 6 is close to one side of the center of the cylinder and is in threaded connection with the limiting portion 7 on the first connecting portion 8, and the limiting portion 7 mainly limits the fastening portion 6.

Therefore, the connection relation between the fastening portion 6 and the first connection portion 8 and the arrangement of the opposite cylinder can circumferentially move, so that the movable connection structure 2 can move in the movable connection hole 11, the movable connection structure 2 can circumferentially move along the supporting structure 1, and the angle of placement of the first steel tube 5 can be adjusted.

In some embodiments, the first movable abutment comprises a first screw 21, a first nut 23 and a first tightening end 22; the first nut 23 is fixed on the first supporting plate 26, the first nut 23 is in threaded connection with the first screw rod 21, a first jacking end 22 is arranged at one end, close to the movable connecting plate 24, of the first screw rod 21, and the first screw rod 21 can move to the position, close to the movable connecting plate 24, so that the first jacking end 22 is abutted against the first steel pipe 5.

In practice, the first nut 23 is fixedly connected with the first support plate 26, the first screw 21 is in threaded connection with the first nut 23, and can stretch out and draw back or keep away from along the direction close to the cylinder for jacking the first steel pipe 5, so that the first movable pressing part is arranged in such a structure that the first steel pipe 5 can be conveniently placed and the first steel pipe 5 can be conveniently jacked.

In some embodiments, the first fixed connection 3 comprises a second support plate 36 and a fixed connection plate 34; the fixed connection plate 34 is fixedly connected with the support structure 1, and a second movable pressing part is connected to the second support plate 36, and the second movable pressing part is movable towards one end close to or far away from the fixed connection plate 34 and is used for pressing the second steel pipe 4.

Specifically, the fixed connection plate 34 includes a third connection plate and a fourth connection plate, wherein an included angle is formed between the third connection plate and the fourth connection plate, and the third connection plate and the fourth connection plate are welded together with the support structure 1, and meanwhile, the second support plate 36 and the fixed connection plate 34 are connected together, so that the third connection plate and the fourth connection plate are integrated with the second support plate 36; and be used for supporting between second activity portion of supporting and the third connecting plate to press second steel pipe 4, at this moment, the fixed position of second steel pipe 4, and the position that above-mentioned first steel pipe 5 can be along the circumference activity of swing joint 2 along the cylinder and place the position change, finally make the welded part angle of first steel pipe 5 and second steel pipe 4 adjustable, after adjusting the angle, with the fixed position of first steel pipe 5 and second steel pipe 4 for first steel pipe 5 and second steel pipe 4 are convenient for weld.

In some embodiments, the second movable abutment comprises: comprising a second screw 31, a second nut 33 and a second tightening end 32; the second nut 33 is fixed on the second supporting plate 36, the second nut 33 is in threaded connection with the second screw rod 31, a second tightening end 32 is arranged at one end of the second screw rod 31, which is close to the fixed connecting plate 34, and the second screw rod 31 can move to the position, which is close to the fixed connecting plate 34, so that the second tightening end 32 is abutted against the second steel pipe 4.

In practice, the second screw 31 is in threaded connection with the second nut 33 fixed on the second support plate 36, the second screw 31 may be close to the cylinder or far from the cylinder, and the second steel pipe 4 is tightly pressed by the second pressing end 32, and the second movable pressing portion is convenient to adjust by this connection and adjustment manner of the second screw 31 and the second nut 33.

In some embodiments, the second fixed connection 9 includes a third support plate 96 and a retaining plate 94, the retaining plate 94 being perpendicular to the third support plate 96, the third movable abutment being movable towards the retaining plate 94 or away from it.

In design, the position of the abutment plate 94 may be aligned with the position of the fixed connection plate 34 on the side close to the second steel pipe 4, so that the third steel pipe 10 and the second steel pipe 4 are aligned on the right side in fig. 1, and the third movable abutment is used for pressing the third steel pipe 10.

In some embodiments, the third movable abutment comprises a third screw 91, a third nut 93 and a third tightening end 92; the third nut 93 is fixed on the third supporting plate 96, the third nut 93 is in threaded connection with the third screw 91, a third tightening end 92 is arranged at one end of the third screw 91, which is close to the blocking plate 94, and the third screw 91 can move to the position, which is close to the blocking plate 94, so that the third tightening end 92 is in pressing contact with the third steel pipe 10. The third movable pressing part and the first movable pressing part and the second movable pressing part have the same principle, and are not described herein.

In some embodiments, the first fixed connection 3 and the second fixed connection 9 are fixedly connected by a detachable plate 13.

In practice, a blind hole is formed in one side of the second support plate 36 away from the second movable pressing portion, the detachable plate 13 is connected with a fixing plate, and the fixing plate is parallel to the second support plate 36 and connected to the second support plate 36 through a connecting piece and the blind hole, so that the second fixed connection structure 9 is detachably connected with the second support plate 36, and when the second fixed connection structure 9 is not used, the second fixed connection structure 9 can be detached.

In some embodiments, the circumference of the support structure 1 may be provided with a scale 12, as shown in fig. 2, that is, the circumference of the cylinder is provided with the scale 12, so that the position of the movable connection structure 2 along with the circumferential movement of the cylinder can be accurately adjusted, for example, when the second steel pipe 4 and the first steel pipe 5 are welded again with the same angle as before, the movable connection structure 2 can be directly rotated by the scale 12 by the same scale 12.

In addition, a first handle portion 25 is provided at an end of the first screw 21 remote from the movable connecting plate 24, and the diameter of the first handle portion 25 is larger than the diameter of the first nut 23.

The first handle portion 25 may be in a structure as shown in the drawing, and is screwed with the first screw 21 to be fixed into a whole, the diameter of the first handle portion 25 is larger than the caliber of the first nut 23, so that the handle portion is convenient to hold, and of course, other structures can be also provided, so that the handle portion is convenient to hold; the second handle 35 may be configured as shown in the drawing, and is integrally screwed with the second screw 31, the second handle 35 has a diameter larger than the diameter of the second nut 33, so that the handle is easy to handle, but may be configured as other configurations, and the third handle 95 is also configured as the first handle 25 and the second handle 35.

In this specification, each embodiment is described in a progressive manner, and the same or similar parts of each embodiment are referred to each other, and each embodiment is mainly described as a difference from other embodiments.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the present utility model; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. A steel pipe welding auxiliary device, characterized by comprising: the device comprises a supporting structure (1), a movable connecting structure (2), a first fixed connecting structure (3) and a second fixed connecting structure (9);

the support structure (1) is configured as a cylinder, the support structure (1) is circumferentially provided with a movable connecting hole (11) along the side surface of the cylinder, the movable connecting structure (2) is circumferentially movable along the support structure (1) at the movable connecting hole (11), the movable connecting structure (2) is provided with a first movable pressing part, and the first movable pressing part is close to or far away from the support structure (1) and is used for pressing a first steel pipe (5);

the first fixed connection structure (3) is fixedly connected to the side face of the supporting structure (1), the first fixed connection structure (3) avoids the movable connection hole (11), a second movable pressing part is arranged on the first fixed connection structure (3), and the second movable pressing part is close to or far away from the supporting structure (1) and is used for propping up the second steel pipe (4);

the first fixed connection structure (3) is deviating from the place of second steel pipe (4) and still can dismantle and be connected with second fixed connection structure (9), be equipped with the third activity on second fixed connection structure (9) and support pressure portion, the third activity supports pressure portion towards being close to or keeping away from on the side extension face of bearing structure (1) activity, and be used for pushing up third steel pipe (10), wherein, third steel pipe (10) with second steel pipe (4) set up perpendicularly.

2. The steel pipe welding auxiliary device according to claim 1, characterized in that the movable connection structure (2) comprises a movable connection plate (24) and a movable part, the movable connection plate (24) is fixedly connected with the movable part, and the movable part is movably connected with the support structure (1) at the movable connection hole (11);

the movable connecting plate (24) is also fixedly connected with a first supporting plate (26), the first supporting plate (26) is connected with a first movable pressing part, and the first movable pressing part moves towards one end close to or far away from the movable connecting plate (24) and is used for pressing a first steel pipe (5).

3. A steel pipe welding auxiliary device according to claim 2, characterized in that the movable part comprises a limit part (7), a fastening part (6) and a first connection part (8);

one end of the first connecting part (8) is connected in the inner angle of the movable connecting plate (24), the other end of the first connecting part extends into the supporting structure (1) through the movable connecting hole (11), the first connecting part (8) located in the supporting structure (1) is in threaded connection with a fastening part (6) and a limiting part (7), and the fastening part (6) is close to the inner wall of the supporting structure (1).

4. A steel pipe welding auxiliary device according to claim 2, characterized in that the first movable abutment comprises a first screw (21), a first nut (23) and a first tightening end (22);

the first nut (23) is fixed on the first supporting plate (26), the first nut (23) is in threaded connection with the first screw rod (21), one end, close to the movable connecting plate (24), of the first screw rod (21) is provided with a first jacking end (22), and the first screw rod (21) can move to a position, close to the movable connecting plate (24), so that the first jacking end (22) is abutted to the first steel pipe (5).

5. A steel pipe welding auxiliary device according to claim 1, characterized in that the first fixed connection (3) comprises a second support plate (36) and a fixed connection plate (34);

the fixed connection plate (34) is fixedly connected with the supporting structure (1), the second supporting plate (36) is connected with the second movable pressing part, and the second movable pressing part is movable towards one end which is close to or far away from the fixed connection plate (34) and is used for pressing the second steel pipe (4).

6. A steel pipe welding auxiliary device according to claim 5 wherein the second movable pressing portion comprises: comprises a second screw (31), a second nut (33) and a second propping end (32);

the second nut (33) is fixed on the second supporting plate (36), the second nut (33) is in threaded connection with the second screw rod (31), one end, close to the fixed connecting plate (34), of the second screw rod (31) is provided with a second jacking end (32), and the second screw rod (31) can move to a position, close to the fixed connecting plate (34), so that the second jacking end (32) is abutted to the second steel pipe (4).

7. A steel pipe welding auxiliary device according to claim 1, characterized in that the second fixed connection structure (9) comprises a third support plate (96) and a abutment plate (94), the abutment plate (94) being perpendicular to the third support plate (96), the third movable abutment being movable towards the abutment plate (94) towards or away from it.

8. The steel pipe welding auxiliary device according to claim 7, wherein the third movable pressing portion includes a third screw (91), a third nut (93) and a third tightening end (92);

the third nut (93) is fixed third backup pad (96), third nut (93) with third screw rod (91) threaded connection, third screw rod (91) are close to the one end of keeping out board (94) is equipped with third tight end (92) in top, third screw rod (91) are movable to be close to keep out board (94) department, so that third tight end (92) with third steel pipe (10) are supported and are pressed.

9. A steel pipe welding auxiliary device according to claim 1, characterized in that the first fixed connection (3) and the second fixed connection (9) are fixedly connected by means of a detachable plate (13).

10. A steel pipe welding auxiliary device according to claim 1, characterized in that the support structure (1) is provided with graduations (12) in the circumferential direction.