CN111300085A

CN111300085A - Clamping and rotating device is stabilized to steel pipe

Info

Publication number: CN111300085A
Application number: CN202010266447.9A
Authority: CN
Inventors: 郑王杰
Original assignee: Yiwu Ziying Machinery Technology Co ltd
Current assignee: Yiwu Ziying Machinery Technology Co ltd
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2020-06-19
Also published as: GB202013663D0

Abstract

The invention discloses a steel pipe stable clamping and rotating device, which comprises a box body, wherein the top wall of the box body is provided with a steel pipe groove with an upward opening, the left and right end walls of the steel pipe groove are symmetrically provided with a first sliding groove with an upward opening, a first sliding block is connected in the first sliding groove in a sliding manner, one side of the first sliding block, which is close to the steel pipe groove, is provided with two end clamping blocks, the end wall, which is far away from the steel pipe groove, of each of the two end clamping blocks is fixedly connected with an annular block, the annular block is rotatably connected with the first sliding block, the side end walls of the two end clamping blocks are uniformly connected with four locking bolts in a threaded manner, the end wall, which is close to the steel pipe groove, is provided with an annular groove with an opening towards the steel pipe groove, the two end walls of the annular groove are uniformly provided with a group of four second sliding, the stress point of the steel pipe in the outer surface operation process is enough, so that the steel pipe is more stable.

Description

Clamping and rotating device is stabilized to steel pipe

Technical Field

The invention relates to the technical field of steel pipes, in particular to a steel pipe stable clamping and rotating device.

Background

Steel pipes are steel with a hollow cross section whose length is much greater than the diameter or circumference. Steel pipes are not only used for transporting fluids and powdery solids, exchanging heat energy, manufacturing mechanical parts and containers, but also are economical steels.

The steel pipe length overlength, it is very unstable to hang the fixed ten minutes of roof beam when carrying out the surface operation, breaks off from the centre easily moreover, and current equipment places stable supporting shoe in surface treatment end both sides, but ten fenders way.

Disclosure of Invention

Aiming at the technical defects, the invention provides a steel tube stable clamping and rotating device which can overcome the defects.

The invention relates to a steel pipe stable clamping and rotating device, which comprises a box body, wherein a steel pipe groove with an upward opening is arranged on the top wall of the box body, first sliding grooves with an upward opening are symmetrically arranged on the left and right end walls of the steel pipe groove, a first sliding block is connected in the first sliding groove in a sliding manner, two end clamping blocks are arranged on one side, close to the steel pipe groove, of the first sliding block, annular blocks are fixedly connected to the end walls, far away from the steel pipe groove, of the two end clamping blocks, the annular blocks are rotatably connected with the first sliding block, four locking bolts are uniformly and threadedly connected to the side end walls of the two end clamping blocks, annular grooves with openings towards the steel pipe groove are arranged on the end walls, close to the steel pipe groove, of the two end clamping blocks, four groups of second sliding grooves with openings towards the annular grooves are uniformly arranged on the two end walls of the annular grooves, a second sliding block is connected, the second sliding block far away from the axes of the two end clamping blocks is in sliding connection with one end, close to the axes, of the locking bolt, one end, close to the steel pipe groove, of each two end clamping blocks is connected with a connecting pipe in a matched mode, an intermediate supporting mechanism is arranged between the two connecting pipes, a gear groove with an upward opening is formed in the end wall, far away from the steel pipe groove, of the first sliding groove, a first gear is arranged in each gear groove, the first gear is fixedly connected with a gear shaft, the gear shaft is rotatably connected with the first sliding block, one end, close to the steel pipe groove, of the gear shaft is fixedly connected with the two end clamping blocks, the bottom wall of the first sliding block is connected with the first sliding groove through a first folding air bag, one side, far away from the steel pipe groove, of the first folding air bag is provided with a first air pipe, a one-way valve is arranged in the first, and an air path switching mechanism is arranged on one side, away from the steel pipe groove, of the first folding air bag.

Beneficially, a motor is arranged on the lower side of the steel pipe groove, a motor shaft is connected to the bottom end of the motor in a power mode, the motor shaft is rotatably connected to the box body, a first bevel gear is fixedly connected to the bottom wall of the motor shaft, the first bevel gear is located in a bevel gear cavity, the first bevel gear is meshed with second bevel gears symmetrically arranged on the left and right sides, the second bevel gears are fixedly connected to a bevel gear shaft, the bevel gear shaft is rotatably connected to the box body, the bevel gear shaft is fixedly connected to a cam, the cam is located in a cam cavity, one end, away from the motor, of the bevel gear shaft is fixedly connected to a lower belt pulley, the lower belt pulley is located in a belt cavity, an upper belt pulley located obliquely in front of the lower belt pulley is arranged in the belt cavity, the upper belt pulley, the steel pipe groove is arranged in the box body, the belt wheel shaft is rotatably connected with the box body, a second gear is fixedly connected to one end, close to the steel pipe groove, of the belt wheel shaft, the second gear can be meshed with the first gear, and a steel pipe rotating mechanism is arranged on the front side of the second gear.

Beneficially, the gas path switching mechanism comprises a first sliding rod which is located above the cam and connected with the cam in a sliding mode, a cylinder is arranged on the upper side of the cam cavity, a piston cavity is arranged in the cylinder, a piston is connected in the piston cavity in a sliding mode, the bottom wall of the piston is fixedly connected with the first sliding rod, the bottom wall of the piston is connected with the piston cavity through a second spring, a second gas pipe which is communicated with the outside is fixedly connected to the end wall, far away from the steel pipe groove, of the piston cavity, a third gas pipe which is communicated with the outside is fixedly connected to the top wall of the piston cavity, a one-way valve is arranged in the third gas pipe, a hose is fixedly connected to the top wall of the piston cavity, a one-way valve is arranged in the hose, the hose is located in the hose groove, a third sliding groove is arranged on the end, the steel pipe connecting device is characterized in that a left ventilation groove and a right ventilation groove which are communicated are formed in the third sliding block, the third sliding block is fixedly connected with the hose, an electromagnet is arranged on the bottom wall of the third sliding groove, the bottom wall of the third sliding block is connected with the third sliding groove through a third spring, a bent pipe which is fixedly arranged in the first sliding block, the two end clamping blocks and the connecting pipe is arranged on one side of the third sliding block, which is close to the steel pipe groove, and one end, which is located in the steel pipe groove, of the bent pipe is in power connection with the middle supporting mechanism.

Beneficially, the middle supporting mechanism comprises supporting blocks fixedly connected between the connecting pipes on two sides, three uniformly arranged fourth air pipes fixedly connected with one end of the curved pipe located in the steel pipe groove are symmetrically arranged on the left and right sides in the supporting blocks, one end of each fourth air pipe far away from the axis is connected with a second folded air bag, the second folded air bag is located in a fourth sliding groove, a fourth sliding block fixedly connected with the second folded air bag is slidably connected in the fourth sliding groove, the end wall of each fourth sliding block far away from the axis is fixedly connected with a second sliding rod, the end wall of each fourth sliding block far away from the axis is connected with the fourth sliding groove through a fourth spring, the end walls of the left and right second sliding rods far away from the axis are fixedly connected with a pressing block, the end wall of each pressing block far away from the axis is fixedly connected with a protective layer, and the bottom wall of each pressing block is provided with a spring, the end wall, close to the axis, of the pressing block is connected with the spring groove through a damping spring, a fifth air pipe is arranged on one side, away from the spring groove, of the second folding air bag, and a sealing sleeve is sleeved at the outer end of the fifth air pipe.

Beneficially, the steel pipe rotating mechanism comprises a first sloping block arranged on the upper side of the first sliding block, the first sloping block is located in a first sloping block groove with a backward opening and is in sliding connection with the first sloping block groove, the front end wall of the first sloping block is connected with the front end wall of the first sloping block groove through a fifth spring, the front end wall of the first sloping block is in sliding connection with the rear end wall of a second sloping block, the second sloping block is located in a third sloping block groove and is in sliding connection with the third sloping block groove, the front end wall of the second sloping block is fixedly connected with a fifth sliding block, the fifth sliding block is located in a fifth sliding groove with a backward opening and is in sliding connection with the fifth sloping block groove, the end wall of the fifth sliding block far away from the steel pipe groove is connected with the fifth sliding groove through a sixth spring, the rear end wall of the lower end of the second sloping block is in sliding connection with a tensioning block, the tensioning block is located in sliding connection with a tensioning block groove with an upward opening, and the front end wall of the tensioning, the rear end of the tensioning block is positioned in the belt cavity.

The beneficial effects are that: the device can fix two ends and support the steel pipe in the pipe by air pressure, so that the stress point of the steel pipe is enough in the outer surface operation process, the steel pipe is more stable, the steel pipe can be lifted to expose a processing surface and rotate after the air pressure is fixed, the processing work of the surface of the steel pipe is more stable, the air path switching mechanism can switch the air path to enable the steel pipe to ascend to expose the working surface after the steel pipe is supported by the air pressure, the middle supporting mechanism can support the steel pipe from the air pressure in the pipe to enable the steel pipe to be stable in the processing process, and the steel pipe rotating mechanism can press the belt to enable the steel pipe to rotate after.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of a steel tube stable clamping and rotating device according to the present invention;

FIG. 2 is a schematic view of A-A in FIG. 1 according to an embodiment of the present invention;

FIG. 3 is a schematic view of the intermediate support mechanism of FIG. 1 according to an embodiment of the present invention;

FIG. 4 is a schematic view of B-B in FIG. 3 according to an embodiment of the present invention.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

The invention will now be described in detail with reference to fig. 1-4, for convenience of description, the following orientations will now be defined: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The steel pipe stable clamping and rotating device comprises a box body 10, wherein a steel pipe groove 66 with an upward opening is arranged on the top wall of the box body 10, first sliding grooves 54 with an upward opening are symmetrically arranged on the left and right end walls of the steel pipe groove 66, a first sliding block 19 is connected in the first sliding groove 54 in a sliding manner, two end clamping blocks 42 are arranged on one side, close to the steel pipe groove 66, of the first sliding block 19, an annular block 21 is fixedly connected to the end wall, far away from the steel pipe groove 66, of the two end clamping blocks 42, the annular block 21 is rotatably connected with the first sliding block 19, four locking bolts 39 are uniformly screwed on the side end walls of the two end clamping blocks 42, an annular groove 41 with an opening towards the steel pipe groove 66 is arranged on the end wall, close to the steel pipe groove 66, two end walls of the annular groove 41 are uniformly provided with a set of four second sliding grooves 51 which are symmetrically, a second slide block 52 is slidably connected in the second slide groove 51, the second slide block 52 is connected with the second slide groove 51 through a first spring 40, the second slide block 52 far away from the axis of the two-end clamping blocks 42 is slidably connected with one end of the locking bolt 39 close to the axis, one end of the two-end clamping blocks 42 close to the steel pipe groove 66 is connected with a connecting pipe 43 in a matching manner, an intermediate support mechanism is arranged between the two connecting pipes 43, a gear groove 53 with an upward opening is arranged on the end wall of the first slide groove 54 far away from the steel pipe groove 66, a first gear 17 is arranged in the gear groove 53, the first gear 17 is fixedly connected with a gear shaft 18, the gear shaft 18 is rotatably connected with a first slide block 19, one end of the gear shaft 18 close to the steel pipe groove 66 is fixedly connected with the two-end clamping blocks 42, and the bottom wall of the first slide block 19 is connected with the first slide groove 54 through a first, one side that first folding gasbag 22 kept away from steel-pipe groove 66 is provided with first trachea 50, be provided with the check valve in the first trachea 50, first folding gasbag 22 front end is provided with accesss to the external world and overlaps the outlet duct that has the cock cover, first folding gasbag 22 keeps away from one side of steel-pipe groove 66 is provided with the gas circuit shifter.

Beneficially, a motor 46 is disposed at the lower side of the steel pipe slot 66, a motor shaft 45 is dynamically connected to the bottom end of the motor 46, the motor shaft 45 is rotatably connected to the box body 10, a first bevel gear 44 is fixedly connected to the bottom wall of the motor shaft 45, the first bevel gear 44 is located in a bevel gear cavity 47, the first bevel gear 44 is in meshed connection with second bevel gears 48 symmetrically disposed left and right, the second bevel gears 48 are fixedly connected to a bevel gear shaft 25, the bevel gear shaft 25 is rotatably connected to the box body 10, the bevel gear shaft 25 is fixedly connected to a cam 24, the cam 24 is located in a cam cavity 26, one end of the bevel gear shaft 25 away from the motor 46 is fixedly connected to a lower pulley 23, the lower pulley 23 is located in a belt cavity 15, an upper pulley 11 located obliquely in front of the lower pulley 23 is disposed in the belt cavity 15, the upper pulley 11 is connected to the lower pulley 23 by a belt, the upper belt wheel 11 is fixedly connected with a belt wheel shaft 12, the belt wheel shaft 12 is rotatably connected with the box body 10, one end of the belt wheel shaft 12 close to the steel pipe groove 66 is fixedly connected with a second gear 13, the second gear 13 can be meshed and connected with the first gear 17, and a steel pipe rotating mechanism is arranged on the front side of the second gear 13.

Beneficially, the air path switching mechanism comprises a first slide bar 27 located above and slidably connected with the cam 24, a cylinder 32 is arranged on the upper side of the cam cavity 26, a piston cavity 31 is arranged in the cylinder 32, a piston 30 is slidably connected in the piston cavity 31, the bottom wall of the piston 30 is fixedly connected with the first slide bar 27, the bottom wall of the piston 30 is connected with the piston cavity 31 through a second spring 28, a second air pipe 29 leading to the outside is fixedly connected to the end wall of the piston cavity 31 far away from the steel pipe groove 66, a third air pipe 33 leading to the outside is fixedly connected to the top wall of the piston cavity 31, a one-way valve is arranged in the third air pipe 33, a hose 34 is fixedly connected to the top wall of the piston cavity 31, a one-way valve is arranged in the hose 34, the hose 34 is located in a hose groove 79, and a third chute 35 is arranged on the end wall of the hose groove 79 close, a third sliding block 37 is connected in the third sliding groove 35 in a sliding manner, a ventilation groove 38 which is communicated left and right is formed in the third sliding block 37, the third sliding block 37 is fixedly connected with the hose 34, an electromagnet 49 is arranged on the bottom wall of the third sliding groove 35, the bottom wall of the third sliding block 37 is connected with the third sliding groove 35 through a third spring 36, a curved pipe 20 which is fixedly arranged in the first sliding block 19, the two-end clamping blocks 42 and the connecting pipe 43 is arranged on one side, close to the steel pipe groove 66, of the third sliding block 37, and one end, located in the steel pipe groove 66, of the curved pipe 20 is in power connection with an intermediate supporting mechanism.

Advantageously, the intermediate supporting mechanism comprises a supporting block 80 fixedly connected between the connecting pipes 43 at two sides, three uniformly arranged fourth air pipes 78 fixedly connected with one end of the curved pipe 20 in the steel pipe groove 66 are symmetrically arranged in the supporting block 80, one end of the fourth air pipe 78 far away from the axis is connected with the second folded air bag 76, the second folded air bag 76 is located in a fourth sliding groove 77, a fourth sliding block 75 fixedly connected with the second folded air bag 76 is slidably connected in the fourth sliding groove 77, a second sliding rod 73 is fixedly connected with the end wall of the fourth sliding block 75 far away from the axis, the end wall of the fourth sliding block 75 far away from the axis is connected with the fourth sliding groove 77 through a fourth spring 74, pressing blocks 72 are fixedly connected with the end walls of the left and right second sliding rods 73 far away from the axis, and protective layers 71 are fixedly connected with the end walls of the pressing blocks 72 far away from the axis, the bottom wall of the pressing block 72 is provided with a spring groove 68 with an outward opening, the end wall of the pressing block 72 close to the axis is connected with the spring groove 68 through a damping spring 67, one side of the second folding air bag 76 far away from the spring groove 68 is provided with a fifth air pipe 70, and the outer end of the fifth air pipe 70 is sleeved with a sealing sleeve 69.

Advantageously, the steel pipe rotating mechanism comprises a first inclined block 55 arranged on the upper side of the first sliding block 19, the first inclined block 55 is positioned in a first inclined block groove 64 with a backward opening and is connected with the first inclined block groove 64 in a sliding manner, the front end wall of the first inclined block 55 is connected with the front end wall of the first inclined block groove 64 through a fifth spring 65, the front end wall of the first inclined block 55 is connected with the rear end wall of a second inclined block 56 in a sliding manner, the second inclined block 56 is positioned in a third inclined block groove 63 and is connected with the third inclined block groove in a sliding manner, the front end wall of the second inclined block 56 is fixedly connected with a fifth sliding block 62, the fifth sliding block 62 is positioned in a fifth sliding groove 61 with a backward opening and is connected with the fifth sliding groove 61 in a sliding manner, the end wall of the fifth sliding block 62 far away from the steel pipe groove 66 is connected with the fifth sliding groove 61 through a sixth spring 60, the rear end wall of the lower end of the second inclined block 56 is connected with a tensioning block 57 in a sliding manner, the tensioning, the front end wall of the tensioning block 57 is connected with the tensioning block groove 58 through a seventh spring 59, and the rear end of the tensioning block 57 is positioned in the belt cavity 15.

In the initial state, the first spring 40, the second spring 28, the third spring 36, the fourth spring 74, the damping spring 67, the fifth spring 65, the sixth spring 60 and the seventh spring 59 are all in the normal tension state, and the belt 14 is in the loose state;

sequence of mechanical actions of the whole device:

1. removing the connecting pipe 43 at one side, putting one end of the steel pipe into the annular groove 41, screwing the locking bolt 39 to fix one end of the steel pipe, putting the removed connecting pipe 43 back and putting the other end into the other annular groove 41, screwing the locking bolt 39 at the other side to enable the middle support mechanism to enter the steel pipe, starting the motor 46 to enable the motor shaft 45 to rotate, enabling the first bevel gear 44 to rotate, enabling the second bevel gear 48 to rotate, enabling the bevel gear shaft 25 to rotate, enabling the cam 24 to rotate, enabling the piston 30 and the first slide bar 27 to move up and down, enabling the hose 34, the vent groove 38, the curved pipe 20 and the fourth air pipe 78 to inflate the second folded air bag 76, enabling the second slide bar 73, the pressing block 72 and the protective layer 71 to move outwards to press the inner wall of the steel pipe, and accordingly achieving middle air pressure support of the sensing pipe;

2. the electromagnet 49 is turned on to move the third slider 37 downward to inflate the first folded air cell 22 through the hose 34, the vent groove 38 and the first air tube 50, thereby raising the steel pipe as the first slider 19 is raised to expose the machined surface of the steel pipe out of the housing 10, the first slider 19 is moved upward to move the first ramp 55 forward to move the second ramp 56 back to the steel pipe groove 66 to press the tension block 57 against the belt 14 to tension the belt when the first slider is at the highest position, the electromagnet 49 is turned off to move the third slider 37 upward when the first slider 19 is at the highest position to stop inflating the first folded air cell 22, the bevel gear shaft 25 is rotated to rotate the lower pulley 23 to rotate the upper pulley 11 to rotate the pulley shaft 12 to rotate the second gear 13 to rotate the first gear which is engaged with the second gear 13 at the present stage, thereby rotating the both-end blocks 42 and thus rotating the steel pipe, and thus causing the upper tool to process the rotating steel pipe;

3. when the device needs to reset, the motor 46 is turned off to stop the movement of each moving part, gas in the first folding air bag is discharged, the first sliding block 19 moves downwards, the spring plays a reset role, the belt 14 is restored to a loose state, the locking bolt is unscrewed, one end of the steel pipe is taken down, gas in the second folding air bag is discharged, so that the middle of the inside of the steel pipe stops air pressure to compress, the steel pipe is taken down, and the taken-down part is put back into the device to complete the reset of the device.

The above description is only an embodiment of the invention, but the scope of the invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the invention. Therefore, the protection scope of the invention should be subject to the protection scope defined by the claims.

Claims

1. The utility model provides a centre gripping rotary device is stabilized to steel pipe, includes the box, its characterized in that: the top wall of the box body is provided with a steel pipe groove with an upward opening, the left and right end walls of the steel pipe groove are symmetrically provided with first sliding grooves with an upward opening, the first sliding grooves are connected with a first sliding block in a sliding manner, one side of the first sliding block, which is close to the steel pipe groove, is provided with two end clamping blocks, the end wall, which is far away from the steel pipe groove, of each two end clamping block is fixedly connected with an annular block, the annular block is connected with the first sliding block in a rotating manner, the side end walls of the two end clamping blocks are evenly and threadedly connected with four locking bolts, the end walls, which are close to the steel pipe groove, of each two end clamping blocks are provided with annular grooves with openings towards the steel pipe groove, the two end walls of the annular groove are evenly provided with a group of four symmetrically arranged second sliding grooves with openings towards the annular grooves, the second sliding blocks are connected with the second sliding grooves through first springs, and the second sliding blocks, one end of the two end clamping blocks, which is close to the steel pipe groove, is connected with a connecting pipe in a matching way, a middle supporting mechanism is arranged between the two connecting pipes, the end wall of the first sliding chute far away from the steel pipe chute is provided with a gear chute with an upward opening, a first gear is arranged in the gear chute, the first gear is fixedly connected with a gear shaft, the gear shaft is rotatably connected with a first sliding block, one end of the gear shaft close to the steel pipe groove is fixedly connected with the clamping blocks at the two ends, the bottom wall of the first sliding block is connected with the first sliding groove through a first folding air bag, a first air pipe is arranged on one side of the first folding air bag, which is far away from the steel pipe groove, be provided with the check valve in the first trachea, first folding gasbag front end is provided with accesss to the external world and overlaps and have the outlet duct of cock sleeve, one side that first folding gasbag kept away from the steel-pipe groove is provided with the gas circuit shifter.

2. The steel pipe stable clamping and rotating device according to claim 1, characterized in that: a motor is arranged on the lower side of the steel pipe groove, a motor shaft is in power connection with the bottom end of the motor, the motor shaft is in rotational connection with the box body, a first bevel gear is fixedly connected with the bottom wall of the motor shaft, the first bevel gear is located in a bevel gear cavity, the first bevel gear is in meshed connection with second bevel gears which are symmetrically arranged left and right, the second bevel gears are fixedly connected with a bevel gear shaft, the bevel gear shaft is in rotational connection with the box body, the bevel gear shaft is fixedly connected with a cam, the cam is located in a cam cavity, one end of the bevel gear shaft, far away from the motor, is fixedly connected with a lower belt wheel, the lower belt wheel is located in a belt cavity, an upper belt wheel which is located obliquely in front of the lower belt wheel is arranged in the belt cavity, the upper belt wheel is connected with the lower, one end of the pulley shaft, which is close to the steel pipe groove, is fixedly connected with a second gear, the second gear can be meshed with the first gear, and a steel pipe rotating mechanism is arranged on the front side of the second gear.

3. The steel pipe stable clamping and rotating device according to claim 1, characterized in that: the gas path switching mechanism comprises a first slide bar which is positioned above the cam and is in sliding connection with the cam, a cylinder is arranged on the upper side of the cam cavity, a piston cavity is arranged in the cylinder, a piston is connected in the piston cavity in a sliding manner, the bottom wall of the piston is fixedly connected with the first slide bar, the bottom wall of the piston is connected with the piston cavity through a second spring, the end wall of the piston cavity far away from the steel pipe groove is fixedly connected with a second gas pipe leading to the outside, the top wall of the piston cavity is fixedly connected with a third gas pipe leading to the outside, a one-way valve is arranged in the third gas pipe, the top wall of the piston cavity is fixedly connected with a hose, a one-way valve is arranged in the hose, the hose is positioned in the hose groove, a third sliding groove is arranged on the end wall of the hose groove close to the steel pipe groove, a third sliding block is, the third slider is fixedly connected with the hose, the bottom wall of the third sliding groove is provided with an electromagnet, the bottom wall of the third slider is connected with the third sliding groove through a third spring, one side, close to the steel pipe groove, of the third slider is provided with a curved pipe fixedly arranged in the first slider, the two end clamping blocks and the connecting pipe, and one end, located in the steel pipe groove, of the curved pipe is in power connection with the middle supporting mechanism.

4. The steel pipe stable clamping and rotating device according to claim 1, characterized in that: the middle supporting mechanism comprises supporting blocks fixedly connected between the connecting pipes on two sides, three uniformly arranged fourth air pipes fixedly connected with one ends of the bent pipes positioned in the steel pipe grooves are symmetrically arranged in the supporting blocks in a left-right mode, one ends of the fourth air pipes far away from the axis are connected with a second folding air bag, the second folding air bag is positioned in a fourth sliding groove, a fourth sliding block fixedly connected with the second folding air bag is connected in the fourth sliding groove in a sliding mode, the end wall of the fourth sliding block far away from the axis is fixedly connected with a second sliding rod, the end wall of the fourth sliding block far away from the axis is connected with the fourth sliding groove through a fourth spring, the end walls of the left sliding rod and the right sliding rod far away from the axis are fixedly connected with pressing blocks, the end walls of the pressing blocks far away from the axis are fixedly connected with protective layers, and the bottom walls of the pressing blocks are, the end wall, close to the axis, of the pressing block is connected with the spring groove through a damping spring, a fifth air pipe is arranged on one side, away from the spring groove, of the second folding air bag, and a sealing sleeve is sleeved at the outer end of the fifth air pipe.

5. The steel pipe stable clamping and rotating device according to claim 2, characterized in that: the steel pipe rotating mechanism comprises a first inclined block arranged on the upper side of a first sliding block, the first inclined block is positioned in a first inclined block groove with a backward opening and is in sliding connection with the first inclined block groove, the front end wall of the first inclined block is connected with the front end wall of the first inclined block groove through a fifth spring, the front end wall of the first inclined block is in sliding connection with the rear end wall of a second inclined block, the second inclined block is positioned in a third inclined block groove and is in sliding connection with the third inclined block groove, the front end wall of the second inclined block is fixedly connected with a fifth sliding block, the fifth sliding block is positioned in a fifth sliding groove with a backward opening and is in sliding connection with the fifth sliding block, the end wall of the fifth sliding block, which is far away from the steel pipe groove, is connected with the fifth sliding groove through a sixth spring, the rear end wall of the lower end of the second inclined block is in sliding connection with a tensioning block, the tensioning block is positioned in sliding connection with a tensioning block groove with an upward opening, and the front end wall, the rear end of the tensioning block is positioned in the belt cavity.