CN222408724U - Steel pipe packer - Google Patents

Abstract

The utility model relates to the technical field of steel tube packing, in particular to a steel tube packing machine which comprises a steel tube conveying device, a steel tube grabbing device and a steel tube clamping device, wherein the steel tube grabbing device comprises a cross beam, a movable trolley movably arranged on the cross beam, a mechanical arm movably arranged on the movable trolley and a steel tube grabbing mechanism arranged on the mechanical arm, the movable trolley comprises a movable plate, a horizontal driving mechanism arranged between the movable plate and the cross beam and a vertical driving mechanism arranged between the movable plate and the mechanical arm, and the steel tube grabbing mechanism comprises a turnover driving assembly, a grabbing assembly and a turnover transmission assembly. Through movably installing in the travelling car of crossbeam, movably install in the arm of travelling car and set up the grabbing device on the arm mutually support, realized automatic snatching steel pipe and packing on the steel pipe platform, reduced staff's intensity of labour, saved the manual work, improved packing speed and packing efficiency of steel pipe.

Description

Steel pipe packer

Technical Field

The utility model relates to the technical field of steel tube packing, in particular to a steel tube packing machine.

Background

The last process of seamless steel pipe production line is regarded as in steel pipe packing, and the production rhythm of whole production line is directly decided to its speed of packing, has disclosed a galvanized steel pipe packing apparatus through the current patent of retrieving application number CN202321399439.7, belongs to steel pipe packing technical field, is provided with the workstation, first spout has been seted up to the upper surface of workstation, the inner wall of first spout is fixed to be inlayed and is had two bearings, two the inner circle of bearing is positive and negative threaded rod of fixedly connected with jointly, the right flank fixedly connected with rotating electrical machines of workstation, rotating electrical machines's output and positive and negative threaded rod fixed connection, the inside sliding connection of first spout has two first sliders, two the equal fixedly connected with baffle of upper surface of first slider, two first screw hole has all been seted up to a side that first slider is close to each other. However, in the above patent, the steel pipes are required to be manually conveyed to the workbench for packing, so that not only is the labor intensity of workers increased, but also the packing speed and the packing efficiency of the steel pipes are reduced.

Disclosure of utility model

The utility model aims to provide a steel pipe packer with higher packing efficiency so as to overcome the problems in the existing equipment.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a steel pipe baling press, including steel pipe conveyor, steel pipe grabbing device and steel pipe clamping device, steel pipe conveyor sets up in one side of steel pipe clamping device, steel pipe clamping device includes the steel pipe platform and locates two grip blocks on the steel pipe platform, steel pipe grabbing device includes the crossbeam, the travelling car of movably installing in the crossbeam, the arm of movably installing in the travelling car and set up the steel pipe grabbing mechanism on the arm, the travelling car includes the travelling plate, install the horizontal drive mechanism between travelling plate and crossbeam and install the vertical drive mechanism between travelling plate and arm, steel pipe grabbing mechanism includes the upset drive assembly, snatch the subassembly and set up the upset drive assembly between upset drive assembly and snatch the subassembly, snatch the subassembly and include the bull stick and locate a plurality of clamping members on the bull stick, every clamping member includes down the arm, go up the arm, set up the splint on the arm down, be fixed in the clamping cylinder of arm and connect the electromagnet of clamping cylinder.

Based on the technical scheme, the utility model can also be improved as follows:

Further, a horizontal guide rail is arranged between the moving plate and the cross beam along the horizontal direction, a vertical guide rail is arranged between the moving plate and the mechanical arm along the vertical direction, the mechanical arm is driven to do horizontal reciprocating motion along the horizontal guide rail through a horizontal driving mechanism, and the mechanical arm is driven to do vertical reciprocating motion along the vertical guide rail through a vertical driving mechanism.

Further, the mechanical arm comprises a mechanical arm body and a supporting seat, wherein the mechanical arm body and the supporting seat are vertically arranged, and the vertical guide rail is arranged between the moving plate and the mechanical arm body.

Further, the horizontal driving mechanism and the vertical driving mechanism comprise a first driving motor, a gear and a rack, an output shaft of the first driving motor is connected with the gear, the gear is meshed with the rack, the rack of the horizontal driving mechanism is horizontally arranged on the cross beam, and the rack of the vertical driving mechanism is vertically arranged on the mechanical arm body.

Further, the plurality of clamping members are equidistantly arranged on the rotating rod at intervals along the length direction of the rotating rod.

Further, one end of the lower clamping arm and one end of the upper clamping arm are fixed on the rotating rod through screw connection, the clamping plate is fixed on the other end of the lower clamping arm through screw connection, the clamping oil cylinder is fixed on the other end of the upper clamping arm through screw connection and is provided with a telescopic rod, the telescopic rod of the clamping oil cylinder penetrates through the other end of the upper clamping arm to be connected with the electromagnetic chuck, the clamping plate and the electromagnetic chuck are respectively located on the inner sides of the lower clamping arm and the upper clamping arm, and the clamping plate and the electromagnetic chuck are opposite to each other.

Further, the turnover driving assembly is a second driving motor, the turnover driving assembly comprises a gear box, two driving plates, a first belt pulley, a second belt pulley and a driving belt, the turnover driving assembly and the gear box are installed on the mechanical arm through screws, the two driving plates are arranged on two opposite sides of the supporting seat, and the driving belt is sleeved on the first belt pulley and the second belt pulley.

Further, the gear box is provided with a power input shaft and a power output shaft, the power input shaft is connected with an output shaft of the second driving motor, the power output shaft penetrates through one of the upper ends of the driving plates to be connected with the first belt pulley, two ends of the rotating rod are correspondingly and rotatably connected to the lower ends of the driving plates, one end of the rotating rod penetrates through the lower ends of the driving plates to be connected with the second belt pulley, a bearing seat is arranged at the joint of two ends of the rotating rod and the lower ends of the two driving plates, and a bearing seat is also arranged at the joint of the power output shaft of the gear box and the upper ends of the driving plates.

Further, the steel pipe conveying device is arranged on one side of the steel pipe clamping device and comprises a fixed table, a plurality of groups of bearing seats I and a plurality of motors arranged on the fixed table, a plurality of rotating shafts rotatably connected to the bearing seats I and a plurality of conveying rollers sleeved on the rotating shafts.

The steel pipe platform is characterized in that the top surface of the steel pipe platform is used for placing a steel pipe, supporting columns are arranged below the steel pipe platform, two clamping plates are arranged on two opposite sides of the steel pipe platform and incline relative to the top surface of the steel pipe platform, the inclination angle is 45-60 degrees, two sliding grooves are formed in the top surface of the steel pipe platform, two sliding blocks are connected inside the two sliding grooves in a sliding mode, the tops of the two sliding blocks are fixedly connected with the two clamping plates correspondingly, electric telescopic rods are fixedly connected to the inner walls of the two sliding grooves correspondingly, and the output ends of the two electric telescopic rods are fixedly connected with the two sliding blocks correspondingly.

Compared with the prior art, the steel pipe packer is provided with the steel pipe grabbing device in a matched mode, and the steel pipe grabbing device is matched with the moving trolley movably arranged on the cross beam, the mechanical arm movably arranged on the moving trolley and the grabbing device arranged on the mechanical arm, so that the steel pipe is automatically grabbed and packed on a steel pipe platform, labor intensity of workers is reduced, labor is saved, and packing speed and packing efficiency of the steel pipe are improved.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a schematic view of a steel pipe baler according to a preferred embodiment of the present utility model;

FIG. 2 is a front side view of the steel pipe wrapping machine of FIG. 1;

FIG. 3 is a schematic view showing the construction of the steel pipe conveying apparatus and the steel pipe clamping apparatus of FIG. 2;

FIG. 4 is a left side view of the steel pipe conveying apparatus and the steel pipe clamping apparatus of FIG. 3;

FIG. 5 is a schematic view of the steel pipe platform and clamping plate of FIG. 3;

fig. 6 is a partial construction view of the steel pipe gripping apparatus of fig. 1;

FIG. 7 is an enlarged view of portion A of FIG. 6;

FIG. 8 is an enlarged view of portion B of FIG. 6;

FIG. 9 is a schematic view of the steel pipe gripping apparatus of FIG. 1 gripping a steel pipe;

The device comprises a fixed table 11, a fixed table 12, a bearing seat I, a motor 13, a rotating shaft 15, a conveying roller 20, a cross beam 201, a stand column 21, a moving plate 211, a horizontal guide rail 212, a vertical guide rail 22, a horizontal driving mechanism 221, a first driving motor 222, a gear 223, a rack 23, a vertical driving mechanism 24, a mechanical arm body 25, a supporting seat 26, a turnover driving component 27, a turnover driving component 271, a gear box 272, a transmission plate 273, a belt pulley I274, a belt pulley II, 275, a transmission belt 276, a bearing seat II, 28, a grabbing component 280, a rotating rod 281, a lower clamping arm 282, an upper clamping arm 283, a clamping plate 284, a clamping cylinder 285, an electromagnetic chuck 31, a steel pipe platform 32, a clamping plate 33, a supporting stand column 34, a sliding chute 35, a sliding block 36, an electric telescopic rod 40 and a steel pipe.

Detailed Description

The utility model will now be described in further detail with reference to the drawings and examples, which are simplified schematic illustrations of the basic structure of the utility model, which are presented only by way of illustration, and thus show only the structures that are relevant to the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the 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. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

As shown in fig. 1 to 9, a steel pipe packer according to a preferred embodiment of the present utility model includes a steel pipe conveying device, a steel pipe gripping device, and a steel pipe clamping device.

The steel pipe conveying device is arranged on one side of the steel pipe clamping device and comprises a fixed table 11, a plurality of groups of bearing seats I12 and a plurality of motors 13 which are arranged on the fixed table 11, a plurality of rotating shafts 14 which are rotatably connected with the bearing seats I12, and a plurality of conveying rollers 15 which are sleeved on the rotating shafts 14. The plurality of rotating shafts 14 are in one-to-one correspondence with the plurality of motors 13, one rotating shaft 14 is rotatably connected to each group of bearing seats 112, a conveying roller 15 is correspondingly sleeved on each rotating shaft 14, one end of each rotating shaft is correspondingly connected with the output shaft of one motor 13, the conveying roller 15 rotates under the driving of the motor 13, and the steel pipe 40 is conveyed to one side of the steel pipe clamping device.

The steel pipe clamping device comprises a steel pipe platform 31 and two clamping plates 32 arranged on the steel pipe platform 31, wherein the top surface of the steel pipe platform 31 is used for placing a steel pipe 40, a supporting upright post 33 is arranged below the steel pipe platform 31, and the two clamping plates 32 are arranged on two opposite sides of the steel pipe platform 31 and incline relative to the top surface of the steel pipe platform 31 by 45-60 degrees. Two sliding grooves 34 are formed in the top surface of the steel pipe platform 31, two sliding blocks 35 are slidably connected in the two sliding grooves 34, the tops of the two sliding blocks 35 are fixedly connected with the two clamping plates 32 correspondingly, electric telescopic rods 36 are fixedly connected to the inner walls of the two sliding grooves 34, and the output ends of the two electric telescopic rods 36 are fixedly connected with the two sliding blocks 35 correspondingly. The two clamping plates 32 are driven to move along the sliding groove 34 by the two electric telescopic rods 36, so that an opening-degree-adjustable steel pipe clamping device is formed, and the stacked steel pipes 40 can be conveniently clamped for shaping and packaging.

The steel pipe grabbing device is used for carrying the steel pipe 40 from the steel pipe conveying device to the steel pipe clamping device and comprises a cross beam 20, a movable trolley movably mounted on the cross beam 20, a mechanical arm movably mounted on the movable trolley and a steel pipe grabbing mechanism arranged on the mechanical arm.

The travelling car includes movable plate 21, installs the horizontal actuating mechanism 22 between movable plate 21 and crossbeam 20 and installs the vertical actuating mechanism 23 between movable plate 21 and arm, and crossbeam 20 bottom both ends are equipped with two stand 201, and crossbeam 20 and two stand 201 form the arch structure of crossing above steel pipe conveyor and steel pipe clamping device. A horizontal guide rail 211 is horizontally arranged between the moving plate 21 and the cross beam 20, so that the moving trolley drives the mechanical arm to move along the horizontal guide rail 211 in the horizontal direction. A vertical guide rail 212 is vertically arranged between the moving plate 21 and the mechanical arm, so that the mechanical arm can move along the vertical guide rail 212 in the vertical direction. The mechanical arm is driven to horizontally reciprocate along the horizontal guide rail 211 by the horizontal driving mechanism 22, and is driven to vertically reciprocate along the vertical guide rail 212 by the vertical driving mechanism 23.

Specifically, the mechanical arm includes a mechanical arm body 24 and a supporting seat 25, the mechanical arm body 24 and the supporting seat 25 are vertically disposed, and a vertical guide rail 212 is disposed between the moving plate 21 and the mechanical arm body 24.

Specifically, the horizontal driving mechanism 22 and the vertical driving mechanism 23 each include a first driving motor 221, a gear 222, and a rack 223, an output shaft of the first driving motor 221 is connected to the gear 222, the gear 222 is meshed with the rack 223, the rack 223 of the horizontal driving mechanism 22 is horizontally disposed on the cross beam 20, and the rack 223 of the vertical driving mechanism 23 is vertically disposed on the mechanical arm body 24.

The steel pipe grabbing mechanism comprises a turnover driving assembly 26, a grabbing assembly 28 and a turnover transmission assembly 27 arranged between the turnover driving assembly 26 and the grabbing assembly 28, wherein the turnover driving assembly 26 is matched with the turnover transmission assembly 27 and used for driving the grabbing assembly 28 to act.

The grabbing assembly 28 includes a rotating rod 280 and a plurality of clamping members disposed on the rotating rod 280, the plurality of clamping members are disposed on the rotating rod 280 at equal intervals along the length direction of the rotating rod 280, and each clamping member includes a lower clamping arm 281, an upper clamping arm 282, a clamping plate 283 disposed on the lower clamping arm 281, a clamping cylinder 284 fixed on the upper clamping arm 282 by screws, and an electromagnetic chuck 285 connected to the clamping cylinder 284. One end of the lower clamping arm 281 and one end of the upper clamping arm 282 are fixed on the rotating rod 280 through screw connection, the clamping plate 283 is fixed on the other end of the lower clamping arm 281 through screw connection, the clamping oil cylinder 284 is fixed on the other end of the upper clamping arm 282 through screw connection, the clamping oil cylinder 284 is provided with a telescopic rod, the telescopic rod of the clamping oil cylinder 284 penetrates through the other end of the upper clamping arm 282 to be connected with the electromagnetic chuck 285, the clamping plate 283 and the electromagnetic chuck 285 are respectively located on the inner sides of the lower clamping arm 281 and the upper clamping arm 282, and the clamping plate 283 and the electromagnetic chuck 285 are opposite to each other. The telescopic rod is extended when the clamping cylinder 284 works, and is contracted when the clamping cylinder 284 does not work. The telescopic rod is driven to extend by the clamping oil cylinder 284, so that the clamping plate 283 and the electromagnetic chuck 285 are close to each other, the steel pipe 40 can be clamped between the clamping plate 283 and the electromagnetic chuck 285, the clamping plate 283 can hold the steel pipe 40, and the electromagnetic chuck 285 provides magnetic force to adsorb the steel pipe 40.

Specifically, the turnover driving assembly 26 is a second driving motor, the turnover driving assembly 27 comprises a gear box 271, two driving plates 272, a first belt pulley 273, a second belt pulley 274 and a driving belt 275, the turnover driving assembly 26 and the gear box 271 are mounted on the mechanical arm through screws, the gear box 271 is provided with a power input shaft and a power output shaft, the power input shaft is connected with the output shaft of the second driving motor, the two driving plates 272 are arranged on two opposite sides of the supporting seat 25, the power output shaft penetrates through the upper end of one driving plate 272 to be connected with the first belt pulley 273, two ends of the rotating rod 280 are correspondingly and rotatably connected to the lower end of the driving plate 272, one end of the rotating rod 280 penetrates through the lower end of the driving plate 272 to be connected with the second belt pulley 274, and the driving belt 275 is sleeved on the first belt pulley 273 and the second belt pulley 274. The connection part between the two ends of the rotating rod 280 and the lower ends of the two transmission plates 272 is provided with a second bearing seat 276, and the connection part between the power output shaft of the gearbox 271 and the upper ends of the transmission plates 272 is also provided with a second bearing seat 276. When the second driving motor operates, the power output by the second driving motor is transmitted to the rotating rod 280 through the gear box 271, the first belt pulley 273, the driving belt 275 and the second belt pulley 274 in sequence, so that the rotating rod 280 is driven to rotate.

Preferably, the steel pipe packer further comprises a controller, and the coordination control of each mechanism is realized through the controller connected with the motor 13, the electric telescopic rod 36, the horizontal driving mechanism 22, the vertical driving mechanism 23, the overturning driving assembly 26 and the clamping cylinder 284, and the controller can be a commercially available PLC controller, which is not described herein.

When the steel pipe packer is used, the conveying roller 15 is driven by the motor 13 to rotate and convey the steel pipe 40 to one side of the steel pipe clamping device, the horizontal driving mechanism 22 drives the mechanical arm to horizontally move along the horizontal guide rail 211 on the cross beam 20, after the mechanical arm is moved to a set position, the vertical driving mechanism 23 drives the mechanical arm to vertically move downwards along the vertical guide rail 212, so that the grabbing component 28 falls down, after the grabbing component 28 falls down, the horizontal driving mechanism 22 continues to drive the grabbing component 28 to move forwards, so that the steel pipe 40 on the conveying roller 15 enters between the lower clamping arm 281 and the upper clamping arm 282, then the clamping cylinder 284 works, the telescopic rod stretches to enable the clamping plate 283 to be close to the electromagnetic chuck 285, so that the steel pipe 40 is clamped between the clamping plate 283 and the electromagnetic chuck 285, then the vertical driving mechanism 23 drives the mechanical arm to upwards move along the vertical guide rail 212, meanwhile, the overturning driving component 26 drives the lower clamping arm 281 and the upper clamping arm 282 of the grabbing component 28 to vertically move by 90 degrees, after the mechanical arm rises to a position, the horizontal driving mechanism 22 continues to drive the grabbing component 28 to move forwards, so that the steel pipe 40 enters the position between the lower clamping arm 281 and the upper clamping arm 282, and the telescopic rod is retracted to the steel pipe 40, and the steel pipe 40 is clamped by the telescopic rod is stopped after the telescopic rod is moved to the horizontal steel pipe 31 along the horizontal guide rail 20. Then, the electric telescopic rods 36 on the steel pipe platform 31 are started, the two clamping plates 32 are driven to move along the sliding grooves 34 through the two electric telescopic rods 36, the piled steel pipes 40 are clamped, and finally, workers can pack the steel pipes 40.

The above description of the embodiments of the present utility model, which is not related to the present utility model, belongs to the technology known in the art, and may be implemented with reference to the technology known in the art.

The above-described preferred embodiments according to the present utility model are intended to suggest that, from the above description, various changes and modifications can be made by the person skilled in the art without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims (10)

1. The steel tube gripping device comprises a cross beam, a moving trolley movably mounted on the cross beam, a mechanical arm movably mounted on the moving trolley and a steel tube gripping mechanism arranged on the mechanical arm, wherein the moving trolley comprises a moving plate, a horizontal driving mechanism mounted between the moving plate and the cross beam and a vertical driving mechanism mounted between the moving plate and the mechanical arm, the steel tube gripping mechanism comprises a turnover driving component, a gripping component and a turnover transmission component arranged between the turnover driving component and the gripping component, the gripping component comprises a rotating rod and a plurality of gripping members arranged on the rotating rod, each gripping member comprises a lower gripping arm, an upper gripping arm, a clamping plate arranged on the lower gripping arm, a gripping cylinder fixed on the upper gripping arm and an electromagnetic chuck connected with the gripping cylinder.

2. The steel pipe packing machine of claim 1, wherein a horizontal guide rail is horizontally arranged between the moving plate and the cross beam, a vertical guide rail is vertically arranged between the moving plate and the mechanical arm, the mechanical arm is driven by a horizontal driving mechanism to horizontally reciprocate along the horizontal guide rail, and the mechanical arm is driven by a vertical driving mechanism to vertically reciprocate along the vertical guide rail.

3. The steel pipe packing machine of claim 2, wherein the mechanical arm comprises a mechanical arm body and a supporting seat, the mechanical arm body is perpendicular to the supporting seat, and the vertical guide rail is arranged between the moving plate and the mechanical arm body.

4. The steel pipe packing machine of claim 3, wherein the horizontal driving mechanism and the vertical driving mechanism comprise a first driving motor, a gear and a rack, an output shaft of the first driving motor is connected with the gear, the gear is meshed with the rack, the rack of the horizontal driving mechanism is horizontally arranged on the cross beam, and the rack of the vertical driving mechanism is vertically arranged on the mechanical arm body.

5. The steel pipe packing machine according to claim 4, wherein the plurality of clamping members are disposed on the rotating rod at equal intervals along the length direction of the rotating rod.

6. The steel pipe packing machine according to claim 5, wherein one ends of the lower clamp arm and the upper clamp arm are fixed on the rotating rod through screw connection, the clamping plate is fixed on the other end of the lower clamp arm through screw connection, the clamping cylinder is fixed on the other end of the upper clamp arm through screw connection, the clamping cylinder is provided with a telescopic rod, the telescopic rod of the clamping cylinder penetrates through the other end of the upper clamp arm to be connected with the electromagnetic chuck, the clamping plate and the electromagnetic chuck are respectively positioned on the inner sides of the lower clamp arm and the upper clamp arm, and the clamping plate and the electromagnetic chuck are opposite to each other.

7. The steel pipe packing machine of claim 6, wherein the turnover driving assembly is a second driving motor, the turnover driving assembly comprises a gear box, two driving plates, a first belt pulley, a second belt pulley and a driving belt, the turnover driving assembly and the gear box are arranged on the mechanical arm through screws, the two driving plates are arranged on two opposite sides of the supporting seat, and the driving belt is sleeved on the first belt pulley and the second belt pulley.

8. The steel pipe packing machine of claim 7, wherein the gear box is provided with a power input shaft and a power output shaft, the power input shaft is connected with the output shaft of the second driving motor, the power output shaft penetrates through the upper end of one of the transmission plates to be connected with the first belt pulley, two ends of the rotating rod are correspondingly and rotatably connected to the lower end of the transmission plate, one end of the rotating rod penetrates through the lower end of the transmission plate to be connected with the second belt pulley, bearing seats are arranged at the connection positions of the two ends of the rotating rod and the lower ends of the two transmission plates, and the bearing seats are also arranged at the connection positions of the power output shaft of the gear box and the upper ends of the transmission plates.

9. The steel pipe packing machine according to any one of claims 1 to 8, wherein the steel pipe conveying device is arranged on one side of the steel pipe clamping device and comprises a fixed table, a plurality of groups of bearing seats I and a plurality of motors arranged on the fixed table, a plurality of rotating shafts rotatably connected to the bearing seats I and a plurality of conveying rollers sleeved on the rotating shafts.

10. The steel pipe packer of claim 9, wherein the top surface of the steel pipe platform is used for placing a steel pipe, a supporting column is arranged below the steel pipe platform, two clamping plates are arranged on two opposite sides of the steel pipe platform and incline relative to the top surface of the steel pipe platform, the inclination angle is 45-60 degrees, two sliding grooves are formed in the top surface of the steel pipe platform, two sliding blocks are connected inside the two sliding grooves in a sliding mode, the tops of the two sliding blocks are fixedly connected with the two clamping plates correspondingly, electric telescopic rods are fixedly connected to the inner walls of the two sliding grooves respectively, and the output ends of the two electric telescopic rods are fixedly connected with the two sliding blocks correspondingly.