CN111872475A - Cutting device for steel pipe - Google Patents

Abstract

The present application relates to the technical field of cutting equipment, in particular to a cutting device for steel pipes, which includes a bracket, a plurality of cutting mechanisms, a clamping mechanism, and a blanking mechanism; the cutting mechanism includes a worktable, a rotary cutting assembly, and a driving assembly; The feeding mechanism includes two sets of conveyor belts; the clamping mechanism includes several clamping assemblies and three groups of pushing assemblies, and the clamping assemblies include three clamping plates. During the cutting process of the steel pipe, the two sets of push assemblies push a splint on the side and the middle splint to clamp the steel pipe together. The drive assembly will drive the rotary cutting assembly to cut the steel pipe into several sections, and then the two splints will drive the steel pipe to move. The new steel pipe will be placed between the middle plywood and another plywood on the side for clamping and cutting, and then the two plywood will drive the steel pipe to move to another set of conveyor belts for unloading. The present application improves the processing efficiency of the steel pipe.

Description

A cutting device for steel pipes

technical field

The present application relates to the technical field of cutting equipment, and in particular, to a cutting device for steel pipes.

Background technique

Steel pipe usually needs to be cut to a specified length with a circular saw before it can be used.

The current circular saw includes a work table, a cutting assembly and a clamp. During the cutting process, the clamp will clamp the steel pipe on the work table, and the cutting assembly will cut the clamped steel pipe.

In view of the above-mentioned related art, the inventor believes that there are the following defects: for a whole steel pipe, if it is to be cut into several sections, the steel pipe needs to be cut and moved many times, which is inefficient, and therefore needs to be improved.

SUMMARY OF THE INVENTION

In order to improve the processing efficiency of steel pipes, the present application provides a cutting device for steel pipes.

A cutting device for a steel pipe provided by the present application adopts the following technical scheme: a cutting device for a steel pipe, comprising a bracket, a plurality of cutting mechanisms arranged in sequence along the axial direction of the steel pipe, and a clamping device for clamping the steel pipe. Mechanism, a feeding mechanism for conveying the steel pipe after cutting; the cutting mechanism includes a worktable, a rotary cutting assembly and a driving assembly, and the driving assembly drives the rotating cutting assembly to cut the steel pipe; the feeding mechanism includes two sets of conveyor belts extending along the axis of the steel pipe, two The two sets of conveyor belts are arranged on both sides of the workbench; the clamping mechanism includes several clamping assemblies and three sets of pushing assemblies, wherein two sets of clamping assemblies are arranged on one of the workbenches located on the side, and the above-mentioned two sets of clamping assemblies are arranged separately. On the opposite sides of the rotary cutting assembly on the worktable, the other clamping assemblies are respectively arranged on the corresponding worktables. The clamping assembly includes three clamping plates arranged in sequence, and the arrangement direction of the three clamping plates is the same as the axial direction of the steel pipe. Perpendicular to each other, the push component pushes the clamping plates on the same vertical plane in all clamping components to move to the top of the conveyor belt in the direction of the arrangement of the three clamping plates.

By adopting the above technical solution, during the cutting process of the steel pipe, the steel pipe is first placed between a plywood at the side and the middle plywood and placed on the workbench, and then the two plywoods are pushed together by two sets of pushing components to clamp together. Hold the steel pipe, and then the driving component will drive the rotating cutting component to cut the steel pipe, so that the steel pipe is cut into several sections.

Because there are two sets of clamping components on one of the worktables located on the side, the number of clamping components is the same as the number of steel pipes after cutting, so each steel pipe after cutting can be clamped; then the above two groups The push assembly will drive the two splints clamped to the steel pipe to move, so that the cut steel pipe will move to the top of a set of conveyor belts; then the splint at the edge will move away from the steel pipe, and the steel pipe will fall onto the conveyor belt for unloading; At the same time, place the new steel pipe between the middle splint and the other splint at the side, and then push the two splints to hold the new steel pipe together through two sets of push components, and then the new steel pipe can be cut.

When the new steel pipe is cut, the two sets of push components will push the two splints clamped to the steel pipe to move to the other conveyor belt, so that the cut steel pipe falls onto the other group of conveyor belts for unloading. To sum up, the present application can cut the steel pipe in multiple places at the same time, and realize the automatic cutting of the steel pipe, thereby improving the processing efficiency of the steel pipe.

Preferably, the push assembly includes a connecting rod and two first cylinders, the connecting rods are connected to the clamping plates located on the same vertical plane in all the clamping assemblies, the first cylinder is fixed on the bracket, and the extension of the piston rod of the first cylinder The direction is perpendicular to the axial direction of the steel pipe, and the piston rod of the first cylinder is fixedly connected to the connecting rod.

By adopting the above technical solution, when the first cylinder drives the connecting rod to move, all the clamping plates on the same vertical plane will move synchronously, so that the clamping plates can clamp the steel pipe or drive the steel pipe to the conveyor belt.

Preferably, the clamping plate is slidably connected to the workbench along the telescopic direction of the piston rod of the first cylinder.

By adopting the above technical solution, the splint is not easily shaken when it is clamped to the steel pipe and drives the steel pipe to move to the conveyor belt.

Preferably, it also includes a number of moving mechanisms corresponding to the cutting mechanism. The moving mechanism includes a moving table and a driving assembly. The moving table is fixedly connected to the worktable through a connecting frame, and the driving assembly drives the moving table to slide in the axial direction of the steel pipe; on the connecting rod.

By adopting the above technical solution, when the driving component drives the moving table to move, the distance between the adjacent two groups of cutting mechanisms will change, so that the cutting mechanism can cut the steel pipe into different lengths; Therefore, the splint will move synchronously with the worktable, so there is no need for workers to adjust the position of the splint; the splint is slidably sleeved on the connecting rod. Therefore, the connecting rod can still drive all the splints on the same vertical plane to move synchronously.

Preferably, two limit rods and racks extending in the axial direction of the steel pipe are fixed on the support, and the limit rods pass through all the mobile platforms; the driving component includes a first motor and a gear, and the first motor is fixed on the mobile platform The gear is fixedly sleeved outside the output shaft of the first motor and meshed with the rack.

By adopting the above technical solution, when the first motor drives the gear to rotate on the rack, the moving table will move along the extending direction of the rack, thereby adjusting the distance between the adjacent two groups of cutting mechanisms.

Preferably, it also includes a limit mechanism, the limit mechanism includes two sets of abutting assemblies arranged on the side moving platform, the abutting assemblies include a second air cylinder and an abutting plate, the second air cylinder is fixed on the moving platform, and the second air cylinder is fixed on the moving platform. The piston rod of the cylinder extends axially along the steel pipe, the abutting plate is fixed on the piston rod of the second cylinder, and the second cylinder drives the abutting plate to press against the end of the steel pipe.

By adopting the above technical solution, before the steel pipe is cut, the two second cylinders will drive the abutting plates to move, and the two abutting plates will be pressed against the two ends of the steel pipe respectively, so the stability of the steel pipe during cutting is improved. , and the abutting plate will adjust the position of the steel pipe, thereby improving the cutting accuracy of the steel pipe.

Preferably, it also includes a feeding mechanism, the feeding mechanism includes an inclined slideway and a first blocking component, the steel pipes are placed on the inclined slideway in sequence, and the lower end of the inclined slideway is located above the splint; the first blocking component includes a third cylinder and The partition plate, the third cylinder is fixed on the inclined slideway through the fixing frame, and the piston rod of the third cylinder extends along the vertical direction and is fixedly connected to the partition plate.

By adopting the above technical solution, the partition plate blocks the steel pipes placed in sequence on the inclined slideway. When the third cylinder drives the partition plate to move away from the steel tube, all the steel tubes will roll down synchronously, and the bottom steel tube will be separated from the inclined slideway. And do a parabolic motion, and the rest of the steel pipes will be blocked by the reset partition, so that only one steel pipe is fed to the adjacent two sets of splints at a time.

Preferably, the feeding mechanism further includes a second blocking component, the structure of the second blocking component is the same as that of the first blocking component, and the partition in the second blocking component and the partition in the first blocking component are located between A steel pipe is placed.

By adopting the above technical solution, the partition plate in the first blocking component will block the lowermost steel pipe on the inclined slideway, and the partition plate in the second blocking component will block the remaining steel tubes on the inclined slideway, so when the first blocking After the separator in the assembly is detached from the steel pipe, the lowermost steel tube on the inclined slideway will move between two adjacent splints; when the separator in the first blocking assembly is reset, the separator in the second blocking assembly will be detached For steel pipes, all steel pipes on the inclined slideway will slide down and be blocked by the baffles in the first blocking assembly; then the baffles in the second blocking assembly will reset, so that the baffles in the second blocking assembly and the first blocking assembly There is always a steel pipe between the partition plates in the assembly, which ensures that only one steel pipe can move between two adjacent plywood plates at a time.

Preferably, the rotary cutting assembly includes a casing, a second motor and a cutter head, the casing is driven to move by the drive assembly, the second motor is fixed on the casing, the output shaft of the second motor is fixedly connected to the cutter head, and the cutter head The upper part is located in the housing.

By adopting the above technical solution, the second motor will drive the cutter head to rotate and cut the steel pipe, and the scraps splashed during the cutting process will be blocked by the casing.

Preferably, the drive assembly includes a turret and a fourth cylinder, the housing is fixed on the turret, the turret and the fourth cylinder are both rotatably connected to the moving table, the piston rod of the fourth cylinder is rotatably connected to the turret, and the fourth cylinder is rotatably connected to the turret. The axis of the cylinder piston rod lies on the vertical plane.

By adopting the above technical solution, when the piston rod of the fourth cylinder extends, both the fourth cylinder and the turret will rotate, and the turret will drive the casing to move so that the cutter head rotates to cut the steel pipe on the worktable.

To sum up, the present application includes the following beneficial technical effects:

1. The setting of the cutting mechanism, the clamping mechanism and the blanking mechanism can cut the steel pipe in multiple places at the same time, and realize the automatic blanking of the steel pipe, thereby improving the processing efficiency of the steel pipe;

2. The setting of the moving mechanism makes the distance between the adjacent two groups of cutting mechanisms change, so the cutting mechanism can cut the steel pipe into different lengths;

3. The setting of the limit mechanism makes the two abutting plates press against the two ends of the steel pipe respectively, so the stability of the steel pipe during cutting is improved, and the abutting plate will adjust the position of the steel pipe, thereby improving the steel pipe. cutting accuracy;

4. The setting of the feeding mechanism realizes the automatic feeding of the steel pipe and further improves the processing efficiency of the steel pipe.

Description of drawings

Fig. 1 is the overall structure schematic diagram in the embodiment of the present application;

2 is a schematic structural diagram showing a cutting mechanism, a clamping mechanism, a limiting mechanism, a moving mechanism and a blanking mechanism in an embodiment of the present application;

3 is a schematic structural diagram showing a clamping mechanism and a blanking mechanism in an embodiment of the present application;

Fig. 4 is the structural schematic diagram showing the blanking mechanism in the embodiment of the present application;

5 is a schematic structural diagram showing a feeding mechanism, a clamping mechanism and a feeding mechanism in an embodiment of the present application;

FIG. 6 is a schematic structural diagram showing a feeding mechanism in an embodiment of the present application.

Reference numerals: 1, bracket; 11, limit rod; 12, rack; 2, feeding mechanism; 21, inclined slideway; 22, adjustment assembly; 221, limit plate; 222, screw rod; 223, wear 224, turntable; 23, first blocking component; 231, third cylinder; 232, partition plate; 233, fixing frame; 24, second blocking component; 3, cutting mechanism; 31, workbench; 311, knife slot; 312, dovetail block; 313, dovetail slot; 32, rotary cutting assembly; 321, housing; 322, second motor; 323, cutter head; 33, drive assembly; 331, turret; 332, fourth cylinder; 4, clamping mechanism; 41, clamping assembly; 411, splint; 42, pushing assembly; 421, connecting rod; 422, first cylinder; 5, limit mechanism; 51, abutting assembly; 511, second cylinder; 512, abutting plate; 6, moving mechanism; 61, moving table; 62, driving component; 621, first motor; 622, gear; 63, connecting frame; 7, feeding mechanism; 71, conveyor belt; 711, baffle ; 72, the first blanking plate; 73, the second blanking plate.

Detailed ways

The present application will be further described in detail below in conjunction with accompanying drawings 1-6.

The embodiment of the present application discloses a cutting device for a steel pipe. As shown in Figure 1, a cutting device for steel pipes includes a bracket 1, a feeding mechanism 2 for automatic feeding of steel pipes, a plurality of cutting mechanisms 3 arranged in sequence along the axial direction of the steel pipes, and a clamp for clamping the steel pipes. A tightening mechanism 4, a limiting mechanism 5 for pressing against both ends of the steel pipe, several moving mechanisms 6 for adjusting the position of the corresponding cutting mechanism 3, and a blanking mechanism 7 for conveying the steel pipe after cutting.

As shown in FIG. 2 , the cutting mechanism 3 includes a worktable 31 , a rotating cutting assembly 32 and a driving assembly 33 . The rotating cutting assembly 32 includes a casing 321 , a second motor 322 and a cutter head 323 , and the second motor 322 is fixed on the casing 321 On the upper side, the output shaft of the second motor 322 is fixedly connected to the cutter head 323, and the upper part of the cutter head 323 is located in the casing 321; the upper surface of the worktable 31 is provided with a cutter slot 311 for the cutter head 323 to sink into; the drive assembly 33 includes The turret 331 and the fourth cylinder 332, the housing 321 is fixed on the turret 331, the turret 331 and the fourth cylinder 332 are both rotatably connected to the moving mechanism 6, the piston rod of the fourth cylinder 332 is rotatably connected to the turret 331, The axes of the piston rods of the four cylinders 332 lie on the vertical plane.

When the steel pipe is clamped on the table 31 by the clamping mechanism 4, the piston rod of the fourth cylinder 332 will extend, the fourth cylinder 332 and the turret 331 will both rotate, and the turret 331 will drive the casing 321 to the steel pipe The second motor 322 will drive the cutter head 323 to rotate and cut the steel pipe, and the cutter head 323 will sink into the cutter groove 311 to completely cut the steel pipe. Multiple sets of cutting mechanisms 3 can work at the same time, thus realizing multiple cutting of the steel pipe and improving the processing efficiency of the steel pipe.

As shown in FIG. 2 , the clamping mechanism 4 includes several clamping assemblies 41 and three sets of pushing assemblies 42 , wherein two sets of clamping assemblies 41 are provided on one of the worktables 31 located on the side, and the above two sets of clamping assemblies 41 are respectively arranged on the opposite sides of the rotary cutting assembly 32 on the worktable 31, and the other clamping assemblies 41 are respectively arranged on the corresponding worktable 31; The arrangement direction is perpendicular to the axial direction of the steel pipe; the push assembly 42 includes a connecting rod 421 and two first cylinders 422, the connecting rod 421 is connected to the clamping plates 411 on the same vertical plane in all the clamping assemblies 41, the first The cylinder 422 is fixed on the bracket 1 , the extending direction of the piston rod of the first cylinder 422 is perpendicular to the axial direction of the steel pipe, and the piston rod of the first cylinder 422 is fixedly connected to the connecting rod 421 .

During the cutting process of the steel pipe, the steel pipe is first placed between a plywood 411 on the side and the middle plywood 411 and placed on the table 31, and then the first cylinder 422 drives the connecting rod 421 to move, so that the two The clamping plates 411 are jointly clamped to the steel pipe, thereby ensuring the stability of the steel pipe when it is cut. Since two sets of clamping assemblies 41 are provided on one of the workbenches 31 located at the side, the number of clamping assemblies 41 is the same as that of the cut steel pipe, so that each cut steel pipe can be clamped.

As shown in FIG. 2 and FIG. 3 , the unloading mechanism 7 includes two sets of conveyor belts 71 extending in the axial direction of the steel pipe, and the two sets of conveyor belts 71 are respectively arranged on both sides of the workbench 31 . When the steel pipe is cut, the two sets of push components 42 will drive the two clamps 411 clamped to the steel pipe to move, so that the cut steel pipe moves to the top of a set of conveyor belts 71, which are located below the connecting rod 421, so it is not easy to There is positional interference with the connecting rod 421; then the splint 411 at the edge will move away from the steel pipe, and the steel pipe will drop to the conveyor belt 71 for unloading. At the same time, the new steel pipe is placed between the middle plywood 411 and the other plywood 411 on the side, and then the two plywood 411 are pushed together by the two sets of push assemblies 42 to be clamped to the new steel pipe. New steel pipes can be cut.

When the new steel pipe is cut, the two sets of pushing components 42 will push the two clamping plates 411 clamped to the steel pipe to move to the other conveyor belt 71, so that the cut steel pipe falls onto the other group of conveyor belts 71 for unloading. The two groups of conveyor belts 71 cooperate with each other and work alternately to realize the automatic unloading of the steel pipe, thereby improving the processing efficiency of the steel pipe.

As shown in FIG. 4 , the blanking mechanism 7 further includes a first blanking plate 72 and a second blanking plate 73 arranged at the output end of the conveyor belt 71 , and the first blanking plate 72 and the second blanking plate 73 are integrally formed. And the first blanking plate 72 and the second blanking plate 73 are both inclined. The steel pipes dropped from the conveyor belt 71 will be rolled from the first blanking plate 72 to the second blanking plate 73, and then rolled from the second blanking plate 73 to the collection place.

As shown in FIGS. 2 and 3 , the moving mechanism 6 includes a moving table 61 and a driving assembly 62 , the turret 331 and the fourth cylinder 332 are both rotatably connected to the moving table 61 , and the moving table 61 is fixedly connected to the work table 31 through the connecting frame 63 . , the bracket 1 is fixed with two limit rods 11 and racks 12 extending in the axial direction of the steel pipe, and the limit rods 11 pass through all the mobile platforms 61; the driving component 62 includes a first motor 621 and a gear 622, the first motor The gear 621 is fixed on the moving table 61 , and the gear 622 is fixedly sleeved outside the output shaft of the first motor 621 and meshed with the rack 12 . The splint 411 is slidably sleeved on the connecting rod 421, and the dovetail block 312 is fixed on the splint 411; the workbench 31 is provided with a dovetail groove 313 extending along the arrangement direction of the splint 411, and the dovetail block 312 is slidably embedded in the dovetail groove 313 .

When the first motor 621 drives the gear 622 to rotate on the rack 12, the moving table 61 will move along the extending direction of the rack 12, adjusting the distance between the adjacent two groups of cutting mechanisms 3, so that the cutting mechanism 3 can cut the steel pipe Cut into different lengths; because the dovetail block 312 is slidably embedded in the dovetail groove 313, the splint 411 will move synchronously with the table 31, so there is no need for workers to adjust the position of the splint 411; Therefore, the connecting rod 421 can still drive all the splints 411 on the same vertical plane to move synchronously.

As shown in FIG. 2 , the limiting mechanism 5 includes two sets of abutting assemblies 51 disposed on the side moving table 61 , the abutting assemblies 51 include a second air cylinder 511 and a pressing plate 512 , and the second air cylinder 511 is fixed on the moving table 61 , the piston rod of the second cylinder 511 extends axially along the steel pipe, and the abutting plate 512 is fixed on the piston rod of the second cylinder 511 . Before the steel pipe is cut, both the two second cylinders 511 will drive the abutting plates 512 to move, and the two abutting plates 512 will be pressed against the two ends of the steel pipe respectively, thus improving the stability of the steel pipe during cutting, and resisting the The tightening plate 512 will adjust the position of the steel pipe, thereby improving the cutting precision of the steel pipe.

As shown in Figures 5 and 6, the feeding mechanism 2 includes an inclined slideway 21, two sets of adjustment components 22, a first blocking component 23 and a second blocking component 24. The inclined slideway 21 is arranged in a "U" shape, and the steel pipes are arranged in sequence. Placed on the inclined slideway 21, and the lower end of the inclined slideway 21 is located above the splint 411; the first blocking component 23 includes a third cylinder 231 and a partition 232, and the third cylinder 231 is fixed on the inclined slideway by the fixing bracket 233 21 , the piston rod of the third cylinder 231 extends vertically and is fixedly connected to the partition plate 232 ; the structure of the second blocking assembly 24 is the same as that of the first blocking assembly 23 .

The baffle 232 in the first blocking component 23 will block the lowermost steel pipe on the inclined slideway 21, and the partition 232 in the second blocking component 24 will block the remaining steel pipes on the inclined slideway 21, so when the first After the partition plate 232 in the blocking assembly 23 is separated from the steel pipe, the lowermost steel pipe on the inclined slideway 21 will be separated from the inclined slideway 21 and move parabolically between the two adjacent plywood plates 411, thereby realizing the automatic movement of the steel pipe. Feeding.

When the baffle plate 232 in the first blocking assembly 23 is reset, the baffle plate 232 in the second baffle assembly 24 will move away from the steel pipe, and all the steel pipes on the inclined slideway 21 will slide down and be removed by the baffle plate 232 in the first blocking assembly 23 The partition plate 232 is blocked; then the partition plate 232 in the second blocking component 24 will be reset, so that there is always a steel pipe between the partition plate 232 in the second blocking component 24 and the partition plate 232 in the first blocking component 23, It is ensured that only one steel pipe can move between the two adjacent clamping plates 411 at a time.

As shown in FIG. 6 , two sets of adjustment components 22 are located at both ends of the steel pipe. The adjustment components 22 include a limit plate 221, a screw rod 222, a threaded rod 223 and a turntable 224. The screw rod 222 and the threaded rod 223 are located along the steel pipe. The screw rod 222 is rotatably connected to the limiting plate 221 and is screwed to the inclined slideway 21, the threading rod 223 is fixed on the limiting plate 221 and passes through the inclined slideway 21, and the turntable 224 is fixed on the screw rod 222 on. When the screw 222 is rotated by the turntable 224, the limit plate 221 will slide on the piercing rod 223, and the distance between the two sets of limit plates 221 will be changed, realizing the clamping of steel pipes of different lengths and making different The length of the steel pipe can be accurately slid between the two abutting plates 512 .

The implementation principle of a cutting device for a steel pipe according to an embodiment of the present application is as follows: during the processing of the steel pipe, the third air cylinder 231 in the first blocking component 23 will drive the partition plate 232 to separate from the steel pipe, and the inclined slideway 21 is the most The steel pipe below will be separated from the inclined slideway 21 and make a parabolic motion to be between the two adjacent plywood plates 411, thereby realizing the automatic feeding of the steel pipe.

Then the first air cylinder 422 drives the connecting rod 421 to move, so that the two clamping plates 411 are jointly clamped to the steel pipe, the two second air cylinders 511 both drive the abutting plates 512 to move, and the two abutting plates 512 are respectively pressed against the steel pipe The two ends of the steel pipe ensure the stability of the steel pipe; then the piston rod of the fourth cylinder 332 will extend, the fourth cylinder 332 and the turret 331 will both rotate, and the turret 331 will drive the casing 321 to move toward the steel pipe, and the second cylinder 332 will rotate. The motor 322 will drive the cutter head 323 to rotate and cut the steel pipe, and the cutter head 323 will sink into the cutter groove 311 to completely cut the steel pipe. Because multiple sets of cutting mechanisms 3 work at the same time, the steel pipe will be cut into several sections.

Subsequently, the two sets of push assemblies 42 will drive the two clamps 411 clamped to the steel pipe to move, so that the cut steel pipe will move to the top of a set of conveyor belts 71; then the clamp plate 411 located at the edge will move away from the steel pipe, and the steel pipe will fall off. Drop onto the conveyor belt 71 for unloading; at the same time, place the new steel pipe between the clamping plate 411 in the middle and another clamping plate 411 at the edge, and then push the two clamping plates 411 through the two sets of push assemblies 42 to jointly clamp the new steel pipe. , the new steel pipe can be cut at this time.

When the new steel pipe is cut, the two sets of pushing components 42 will push the two clamping plates 411 clamped to the steel pipe to move to the other conveyor belt 71, so that the cut steel pipe falls onto the other group of conveyor belts 71 for unloading. The two groups of conveyor belts 71 cooperate with each other and work alternately to realize automatic unloading of steel pipes.

To sum up, the present application realizes the automatic feeding, automatic clamping, automatic cutting and automatic unloading of the steel pipe, thereby improving the processing efficiency of the steel pipe.

The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore: all equivalent changes made according to the structure, shape and principle of the present application should be covered within the scope of the present application. Inside.

Claims (10)

1. A cutting device for a steel pipe, characterized in that it comprises a bracket (1), a plurality of cutting mechanisms (3) arranged in sequence along the axial direction of the steel pipe, a clamping mechanism (4) for clamping the steel pipe, A feeding mechanism (7) for conveying and cutting the steel pipe; the cutting mechanism (3) includes a worktable (31), a rotary cutting assembly (32) and a driving assembly (33), and the driving assembly (33) drives the rotary cutting assembly (32) to cut Steel pipe; the feeding mechanism (7) includes two sets of conveyor belts (71) extending along the axial direction of the steel pipe, and the two sets of conveyor belts (71) are respectively arranged on both sides of the worktable (31); the clamping mechanism (4) includes several clamping components (41) and three sets of push assemblies (42), of which two sets of clamping assemblies (41) are arranged on one of the workbenches (31) located at the sides, and the above-mentioned two sets of clamping assemblies (41) are respectively arranged on the workbench (31). On the opposite sides of the rotary cutting assembly (32) on the table (31), the remaining clamping assemblies (41) are respectively arranged on the corresponding work table (31), and the clamping assembly (41) includes three splints (41) arranged in sequence ( 411), the arrangement direction of the three clamping plates (411) is perpendicular to the axial direction of the steel pipe, and the pushing assembly (42) pushes the clamping plates (411) on the same vertical plane in all clamping assemblies (41) toward the three clamping plates (411) The arrangement direction moves to the top of the conveyor belt (71). 2. A cutting device for steel pipes according to claim 1, characterized in that: the pushing assembly (42) comprises a connecting rod (421) and two first air cylinders (422), and the connecting rod (421) Connected to the clamping plates (411) located on the same vertical plane in all clamping assemblies (41), the first cylinder (422) is fixed on the bracket (1), and the extension direction of the piston rod of the first cylinder (422) is perpendicular to the steel pipe and the piston rod of the first cylinder (422) is fixedly connected to the connecting rod (421). 3 . The cutting device for steel pipes according to claim 2 , wherein the splint ( 411 ) is slidably connected to the worktable ( 31 ) along the telescopic direction of the piston rod of the first cylinder ( 422 ). 4 . 4. A cutting device for a steel pipe according to claim 3, characterized in that it further comprises a plurality of moving mechanisms (6) corresponding to the cutting mechanism (3), and the moving mechanism (6) comprises a moving table (61) and the driving component (62), the mobile table (61) is fixedly connected to the work table (31) through the connecting frame (63), and the driving component (62) drives the mobile table (61) to slide axially along the steel pipe; the splint (411) slides the sleeve Set on the connecting rod (421). 5 . The cutting device for steel pipes according to claim 4 , wherein two limit rods ( 11 ) and racks ( 12 ) extending in the axial direction of the steel pipe are fixed on the bracket ( 1 ). 6 . ), the limit rods (11) pass through all the mobile platforms (61); the driving assembly (62) includes a first motor (621) and a gear (622), and the first motor (621) is fixed on the mobile platform (61) , the gear (622) is fixedly sleeved outside the output shaft of the first motor (621) and meshes with the rack (12). 6. A cutting device for steel pipes according to claim 4, characterized in that it further comprises a limiting mechanism (5), and the limiting mechanism (5) comprises two groups arranged on the side moving platform (61) The abutting assembly (51) includes a second air cylinder (511) and a pressing plate (512), the second air cylinder (511) is fixed on the moving table (61), and the second air cylinder (511) The piston rod extends axially along the steel pipe, the abutting plate (512) is fixed on the piston rod of the second cylinder (511), and the second cylinder (511) drives the abutting plate (512) to press against the end of the steel pipe. 7. A cutting device for steel pipes according to claim 1, characterized in that it further comprises a feeding mechanism (2), and the feeding mechanism (2) comprises an inclined slideway (21) and a first blocking component ( 23), the steel pipes are placed on the inclined slideway (21) in turn, and the lower end of the inclined slideway (21) is located above the splint (411); the first blocking component (23) includes a third cylinder (231) and a baffle ( 232), the third air cylinder (231) is fixed on the inclined slideway (21) through the fixing frame (233), and the piston rod of the third air cylinder (231) extends in the vertical direction and is fixedly connected to the partition plate (232). 8 . The cutting device for steel pipes according to claim 7 , wherein the feeding mechanism ( 2 ) further comprises a second blocking component ( 24 ), the structure of the second blocking component ( 24 ) being the same as that of the second blocking component ( 24 ). The structure of the first blocking component (23) is the same, and a steel pipe is placed between the partition plate (232) in the second blocking component (24) and the partition plate (232) in the first blocking component (23). 9. A cutting device for steel pipes according to claim 4, characterized in that: the rotary cutting assembly (32) comprises a casing (321), a second motor (322) and a cutter head (323), The casing (321) is driven to move by the driving assembly (33), the second motor (322) is fixed on the casing (321), and the output shaft of the second motor (322) is fixedly connected to the cutter head (323), and the cutter head ( 323) is located inside the housing (321). 10. A cutting device for steel pipes according to claim 9, characterized in that: the driving assembly (33) comprises a turret (331) and a fourth cylinder (332), and the casing (321) is fixed on the On the turret (331), the turret (331) and the fourth cylinder (332) are both rotatably connected to the moving table (61), the piston rod of the fourth cylinder (332) is rotatably connected to the turret (331), and the fourth cylinder (332) is rotatably connected to the turret (331). (332) The axis of the piston rod is on the vertical plane.

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