Positioning device for production and cutting of high-frequency welded pipe

Abstract

The invention relates to the field of pipe cutting, in particular to a high-frequency welded pipe production cutting positioning device which comprises a base, a cutting mechanism is installed at the front end of the upper surface of the base and cuts a welded pipe, a controller is installed on the right side wall of the cutting mechanism, and a supporting plate is installed on the rear side of the upper surface of the base. A first driver electrically connected with the controller is installed in the center of the bottom of the front face of the supporting plate, centering clamping mechanisms are installed on the left side and the right side of the supporting plate through bearings correspondingly, and the centering clamping mechanisms conduct centering clamping on the welded pipe. The problem that traditional equipment is low in single pipe cutting efficiency is thoroughly solved, and the large-scale production requirement is remarkably met; automatic fixed-length cutting is achieved, errors caused by manual measurement are avoided, and manpower, time and cost are saved; the controller accurately judges whether the welded pipe is deformed or not through current fluctuation, the problems of fluid conveying blocking, vibration and high-frequency maintenance caused after the deformed welded pipe is put into use are effectively solved, and the running stability of subsequent equipment is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe cutting, in particular to a positioning device for high-frequency welded pipe production cutting. BACKGROUND

[0002] High-frequency welded pipes are widely used in industrial production due to their fast welding speed, small welding heat-affected zone, no need for pre-treatment and cleaning of workpieces, and the ability to adapt to thin-walled pipes and various metal pipe welding, and have become an important basic component in fluid transportation and structural support scenarios. However, in the production and cutting process of large-diameter high-frequency welded pipes, there are still many problems to be solved in the prior art: first, traditional cutting equipment can only achieve single pipe single cutting operation, which is low in cutting efficiency and difficult to match the rhythm demand of large-scale production for batch production of large-diameter welded pipes; second, the determination of the cutting length of the welded pipe mainly relies on manual measurement, which is not only affected by human operation differences, resulting in large cutting length errors, but also requires a large amount of manpower and time cost, further restricting the improvement of production efficiency; third, the welded pipe is inevitably deformed due to external force collision, extrusion and other factors during processing, forming, storage and transportation, and if the deformation defect of the welded pipe is not detected in time before cutting, it will directly lead to problems such as pipe blockage and fluid vibration in the subsequent fluid transportation process, affecting the transportation efficiency and greatly increasing the equipment operation failure and maintenance frequency and production operation cost. SUMMARY

[0003] The purpose of the embodiment of the present application is to provide a positioning device for high-frequency welded pipe production cutting to solve the problems of low cutting efficiency, inability to automatically cut to length, and inability to detect whether the welded pipe is deformed.

[0004] To achieve the above purpose, the technical scheme provided by the embodiment of the present application is as follows: a positioning device for high-frequency welded pipe production cutting, comprising a base, a cutting mechanism is installed on the front end of the upper surface of the base, the cutting mechanism cuts the welded pipe, a controller is installed on the right side wall of the cutting mechanism, a support plate is installed on the rear side of the upper surface of the base, a first driver electrically connected with the controller is installed on the front bottom center position of the support plate, a centering clamping mechanism is installed on the left and right sides of the support plate through bearings, the centering clamping mechanism realizes centering and clamping of the welded pipe, the first driver drives the centering clamping mechanism to rotate, and the welded pipe is rotated and cut, two detection mechanisms are installed on the left and right sides of the rear side of the base, which can not only measure the moving length of the welded pipe, but also detect whether the welded pipe is deformed.

[0005] Preferably, the centering and clamping mechanism comprises a shell mounted on the outer wall of the support plate through a bearing, the outer wall of the shell is circumferentially mounted with a plurality of teeth engaged with the first driver, the first driver cooperates with the teeth to drive the shell to rotate, the front surface of the shell is mounted with a second driver electrically connected with the controller, the inner side of the shell is circumferentially inserted with at least three clamping blocks, the clamping blocks are moved inward to clamp the welded pipe, the outer wall of the clamping blocks is mounted with a plug rod, the inner cavity of the shell is mounted with a rotatable ring, the outer wall of the ring is circumferentially provided with a plurality of grooves with the same number as the clamping blocks, the plug rod is inserted into the inner cavity of the groove, and the outer wall of the ring is mounted with an external gear ring engaged with the second driver.

[0006] Preferably, the plurality of grooves are distributed on the outer wall of the ring in a clockwise inclined manner.

[0007] Preferably, the detection mechanism comprises an electric sliding table mounted on the rear side of the base, the electric sliding table is electrically connected with the controller, the moving end of the electric sliding table is mounted with a switching assembly, the left side wall of the switching assembly is respectively mounted at the front and back ends with a distance measuring assembly and a deformation detection assembly, the distance measuring assembly and the deformation detection assembly are close to the welded pipe through the electric sliding table, and the switching assembly makes the distance measuring assembly and the deformation detection assembly alternately detect the welded pipe.

[0008] Preferably, the switching assembly comprises a box body mounted on the moving end of the electric sliding table, the distance measuring assembly and the deformation detection assembly are inserted into the left side wall of the box body, the right side of the inner cavity of the box body is mounted with a rotary air cylinder electrically connected with the controller, the output end of the rotary air cylinder is mounted with a swing rod, the two ends of the swing rod are mounted with a connecting rod through a pin shaft, the other ends of the two connecting rods are respectively connected with the distance measuring assembly and the deformation detection assembly through a pin shaft, and when the rotary air cylinder drives the swing rod to rotate, the connecting rods drive the distance measuring assembly and the deformation detection assembly to move in opposite directions; the distance measuring assembly and the deformation detection assembly are switched to the detection point.

[0009] Preferably, the distance measuring assembly comprises a first hollow column inserted into the front end of the left side wall of the box body, the right end of the first hollow column is connected with the connecting rod through a pin shaft, the left end of the first hollow column is mounted with a support seat, the inner cavity of the support seat is mounted with a first roller capable of rolling, the center of the first roller is mounted with a driving gear through a pin shaft, the top of the first hollow column is mounted with a rotating shaft through a bearing, the upper and lower ends of the rotating shaft are respectively mounted with a driven gear and a rotating speed sensor, the driven gear is connected with the driving gear in meshing connection, and the rotating speed sensor is mounted on the inner wall of the first hollow column, the rotating speed sensor is also electrically connected with the controller, the rotating speed sensor calculates the number of rotations of the driven gear, and the product of the number of rotations and the circumference of the first roller is the moving distance of the welded pipe; the movement of the welded pipe is converted into the rolling of the first roller, the length of the welded pipe is accurately calculated through the circumference of the first roller and the number of rotations, the welded pipe is automatically measured in distance, and the welded pipe is cut to a fixed length.

[0010] Preferably, the first roller horizontal line overlaps with the plane where the outer shell midline point is located.

[0011] Preferably, the driving gear and the driven gear are of the same size.

[0012] Preferably, the deformation detection assembly comprises a second hollow column inserted into the rear end of the left side wall of the box body, a limiting rod is inserted into the left side wall of the second hollow column, a spring is inserted into the inner cavity of the second hollow column, the spring pushes the limiting rod to move left under the elastic force of the spring, a second roller capable of rolling is installed at the left end of the limiting rod, the spring elastic force increases the friction force between the second roller and the welded pipe, a contact point electrically connected with the controller is installed at the right end of the front surface of the limiting rod, the contact point prevents the limiting rod from being separated from the second hollow column, an insulator is installed at the front end of the inner cavity of the second hollow column, a resistance wire is wound on the outer wall of the insulator, the right end of the resistance wire is electrically connected with the controller, and the contact point is in contact with the resistance wire; mechanical movement is converted into current change, and whether the welded pipe is deformed is judged according to current fluctuation.

[0013] Preferably, the midline of the insulator is parallel to the moving direction of the limiting rod.

[0014] Compared with the prior art, the embodiment of the present application has the following advantages: 1、The second driver is meshed with the outer gear ring to drive the precise rotation of the circular ring, the sliding grooves inclinedly distributed on the outer wall of the circular ring are in sliding cooperation with the outer side inserting rods of the clamping blocks, all the clamping blocks are driven to move centripetally or outward, the centering and clamping of the welded pipes can be quickly completed, the anti-skid edges on the inner sides of the clamping blocks effectively improve the clamping stability, and the distance between the two welded pipes and the cutting mechanism is ensured to be consistent; meanwhile, the first driver is meshed with the teeth on the outer wall of the shell to drive the synchronous rotation of the two centering and clamping mechanisms, the cutting mechanism located directly above the double stations is cooperated, the cutting piece can complete the rotary cutting of the two welded pipes in single operation, the problem of low single-pipe cutting efficiency of the traditional equipment is solved, and the embodiment is significantly suitable for large-scale production requirements.

[0015] 2. On the one hand, a rotary cylinder drives the swing arm to rotate. Under the linkage of the swing arm and connecting rod, the ranging component and the deformity detection component can be switched alternately, completing both detection tasks without additional manual operation. During fixed-length cutting, the first roller of the ranging component rolls tangentially with the outer wall of the welded pipe. Through the constant-speed meshing of the driving gear and the driven gear, the speed sensor accurately captures the number of rotations of the first roller. Combined with the circumference of the roller, the distance the welded pipe moves is calculated. When the set length is reached, the controller drives the clamping block to lock the welded pipe, realizing automated fixed-length cutting, which avoids the error of manual measurement and saves manpower and time costs. On the other hand, during deformity detection, the spring force pushes the second roller to fit tightly against the outer wall of the welded pipe. If there is concave or convex deformation during the rotation of the welded pipe, it will drive the limit rod to move synchronously, causing the contact position between the contact point and the resistance wire wrapped around the outer wall of the insulator to change, thereby causing the current to change. The controller accurately judges whether the welded pipe is deformed by the current fluctuation, effectively avoiding fluid transportation obstruction, vibration and high-frequency maintenance problems caused by deformed welded pipes after they are put into use, and ensuring the stability of subsequent equipment operation. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention; Figure 2 This is a perspective view of the cutting mechanism of the present invention; Figure 3 This is an exploded view of the centering and clamping mechanism of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 5 This is a perspective view of the testing mechanism of the present invention; Figure 6 This is a perspective view of the switching component of the present invention; Figure 7 This is a perspective view of the ranging component of the present invention; Figure 8 This is a three-dimensional view of the deformity detection component of the present invention.

[0017] In the figure: 1, base; 2, cutting mechanism; 3, controller; 4, support plate; 5, first driver; 6, centering clamping mechanism; 7, detection mechanism; 21, support; 22, hydraulic oil cylinder; 23, angle iron; 24, motor; 25, cutting blade; 61, shell; 62, tooth; 63, second driver; 64, clamping block; 65, insertion rod; 66, ring; 67, chute; 68, outer gear ring; 71, electric sliding table; 72, switching assembly; 73, distance measuring assembly; 74, deformity detection assembly; 721, box body; 722, rotary air cylinder; 723, swing rod; 724, connecting rod; 731, first hollow column; 732, support seat; 733, first roller; 734, driving gear; 735, rotating shaft; 736, driven gear; 737, rotating speed sensor; 741, second hollow column; 742, limiting rod; 743, spring; 744, second roller; 745, contact; 746, insulator; 747, resistance wire. DETAILED DESCRIPTION

[0018] The technical solutions of the patent will be further described in detail below in combination with specific embodiments.

[0019] Embodiments of the application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the application and cannot be understood as a limitation of the application.

[0020] Please refer to Figures 1-8 In the embodiment of the application, a positioning device for cutting of high-frequency welded pipe production includes a base 1, a cutting mechanism 2 is installed on the upper surface of the front end of the base 1, the cutting mechanism 2 cuts the welded pipe, a controller 3 is installed on the right side wall of the cutting mechanism 2, a support plate 4 is installed on the upper surface of the rear side of the base 1, a first driver 5 electrically connected with the controller 3 is installed on the front bottom center of the support plate 4, centering clamping mechanisms 6 are installed on the left and right sides of the support plate 4 through bearings, the centering clamping mechanisms 6 realize centering clamping of the welded pipe, the first driver 5 drives the centering clamping mechanisms 6 to rotate, so that the welded pipe is rotated for cutting, two detection mechanisms 7 are installed on the left and right sides of the rear side of the base 1, which not only can measure the moving length of the welded pipe, but also can detect whether the welded pipe is deformed.

[0021] Further, the cutting mechanism 2 comprises a bracket 21 mounted on the front end of the upper surface of the base 1, and hydraulic cylinders 22 electrically connected with the controller 3 are mounted on the upper surface of the left and right ends of the bracket 21, angle irons 23 are mounted on the output ends of the hydraulic cylinders 22, the angle irons 23 are driven to rise and fall by the hydraulic cylinders 22, motors 24 electrically connected with the controller 3 are mounted on the front surfaces of the angle irons 23, cutting blades 25 are mounted on the output ends of the motors 24, the cutting blades 25 are rotated by the motors 24 to cut the welded pipes, and the cutting blades 25 are located directly above the two centering and clamping mechanisms 6 to cut the two welded pipes at the same time.

[0022] Further, the centering and clamping mechanism 6 comprises an outer shell 61 mounted on the outer wall of the support plate 4 through a bearing, a plurality of tooth gears 62 meshing with the first drivers 5 are mounted on the outer wall of the outer shell 61 in the circumferential direction, the first drivers 5 are matched with the tooth gears 62 to drive the outer shell 61 to rotate, a second driver 63 electrically connected with the controller 3 is mounted on the front surface of the outer shell 61, at least three clamping blocks 64 are inserted into the outer shell 61 in the circumferential direction, the clamping blocks 64 are moved inward to center and clamp the welded pipes, anti-skid edges are arranged on the inner sides of the clamping blocks 64 to improve clamping stability, plug rods 65 are mounted on the outer walls of the clamping blocks 64, the outer walls of the plug rods 65 are circular, the curved surfaces of the plug rods 65 can slide in the non-linear sliding grooves 67 to improve the stability of the plug rods 65 in the sliding grooves 67, rotatable annular rings 66 are mounted in the inner cavities of the outer shell 61, a plurality of sliding grooves 67 are formed in the circumferential direction of the outer walls of the annular rings 66 and have the same number as the clamping blocks 64, the plug rods 65 are inserted into the inner cavities of the sliding grooves 67, and the plurality of sliding grooves 67 are distributed on the outer walls of the annular rings 66 in the clockwise direction, when the annular rings 66 rotate clockwise or counterclockwise, the inclined surfaces of the sliding grooves 67 can extrude the plug rods 65 outward or inward to realize the centripetal movement of the clamping blocks 64, and outer gear rings 68 meshing with the second drivers 63 are mounted on the outer walls of the annular rings 66.

[0023] Further, the detection mechanism 7 comprises an electric sliding table 71 mounted on the rear side of the base 1, the electric sliding table 71 is electrically connected with the controller 3, a switching assembly 72 is mounted on the moving end of the electric sliding table 71, a distance measuring assembly 73 and a deformation detection assembly 74 are respectively mounted on the front and rear ends of the left side wall of the switching assembly 72, the distance measuring assembly 73 and the deformation detection assembly 74 are moved close to the welded pipes by the electric sliding table 71, and the switching assembly 72 makes the distance measuring assembly 73 and the deformation detection assembly 74 alternately detect the welded pipes.

[0024] Further, the switching assembly 72 comprises a box body 721 installed at the moving end of the electric sliding table 71, the distance measuring assembly 73 and the deformation detection assembly 74 are plugged at the left side wall of the box body 721, a rotary air cylinder 722 electrically connected with the controller 3 is installed at the right side of the inner cavity of the box body 721, a swing rod 723 is installed at the output end of the rotary air cylinder 722, a connecting rod 724 is installed at both ends of the swing rod 723 through a pin shaft, and the other ends of the two connecting rods 724 are connected with the distance measuring assembly 73 and the deformation detection assembly 74 through pin shafts, when the swing rod 723 is driven to rotate by the rotary air cylinder 722, the connecting rods 724 pull the distance measuring assembly 73 and the deformation detection assembly 74 to move reversely.

[0025] Further, the distance measuring assembly 73 comprises a first hollow column 731 plugged at the front end of the left side wall of the box body 721, the right end of the first hollow column 731 is connected with the connecting rod 724 through a pin shaft, a support seat 732 is installed at the left end of the first hollow column 731, a first roller 733 capable of rolling is installed in the inner cavity of the support seat 732, the horizontal line of the first roller 733 overlaps the plane where the middle line point of the shell 61 is located, when the welding pipe is clamped by the clamp block 64, the first roller 733 is tangent to the welding pipe, the first roller 733 can roll stably along the outer wall of the welding pipe, a driving gear 734 is installed at the center of the first roller 733 through a pin shaft, a rotating shaft 735 is installed at the top of the first hollow column 731 through a bearing, a driven gear 736 and a rotating speed sensor 737 are installed at the upper and lower ends of the rotating shaft 735 respectively, and the driven gear 736 is engagedly connected with the driving gear 734, the driving gear 734 and the driven gear 736 are of the same size and angular velocity, and the first roller 733 rotating circle number is one-to-one restored, and the rotating speed sensor 737 is installed on the inner wall of the first hollow column 731, and the rotating speed sensor 737 is also electrically connected with the controller 3, the rotating speed sensor 737 calculates the rotating circle number of the driven gear 736, and the product of the rotating circle number and the circumference of the first roller 733 is the moving distance of the welding pipe.

[0026] Further, the deformation detection assembly 74 comprises a second hollow column 741 inserted into the left side wall of the box body 721 at the rear end, the left side wall of the second hollow column 741 is inserted into a limiting rod 742, the center line of the limiting rod 742 is in the same plane as the center of the shell 61, the second roller 744 is located on the tangent point of the outer wall of the welded pipe, the inner cavity of the second hollow column 741 is inserted into a spring 743, the spring 743 is pushed to move left under the elastic force, the left end of the limiting rod 742 is provided with a second roller 744 capable of rolling, the spring 743 increases the friction between the second roller 744 and the welded pipe, the front right end of the limiting rod 742 is provided with a contact 745 electrically connected with the controller 3, the contact 745 prevents the limiting rod 742 from being separated from the second hollow column 741, the front end of the inner cavity of the second hollow column 741 is provided with an insulator 746, the outer wall of the insulator 746 is wound with a resistance wire 747, the right end of the resistance wire 747 is electrically connected with the controller 3, the contact 745 is in contact with the resistance wire 747, the center line of the insulator 746 is parallel to the moving direction of the limiting rod 742, during the movement of the limiting rod 742, it is ensured that the contact 745 is always in contact with the resistance wire 747.

[0027] The working principle is as follows: Step one, the second driver 63 drives the outer gear ring 68 to rotate the circular ring 66 counterclockwise, the inclined surface of the sliding groove 67 extrudes the plug rod 65 centripetally, so that all the clamping blocks 64 slide centripetally at the same time, and the clamping blocks 64 center and clamp the welded pipes; When the first driver 5 drives the gear teeth 62, the shell 61 drives the welded pipes to rotate, the hydraulic oil cylinder 22 drives the angle iron 23 to descend, and the motor 24 drives the cutting piece 25 to rotate. The cutting piece 25 descends between the two welded pipes and cuts the two welded pipes at the same time, thereby improving the cutting efficiency; Step two, the electric sliding table 71 makes the switching assembly 72 close to the welded pipe, when the rotary cylinder 722 drives the swing rod 723 to rotate clockwise or counterclockwise, the two connecting rods 724 drive the first hollow column 731 and the second hollow column 741 to alternately approach or move away from the welded pipe; Step three, when the length of the welded pipe to be cut is controlled, the first roller 733 is in contact with the welded pipe, and the first roller 733 rolls on the welded pipe during the movement of the welded pipe. At the same time, the driving gear 734 drives the driven gear 736, the rotation speed sensor 737 counts the number of revolutions of the first roller 733, and the movement distance of the welded pipe is calculated according to the circumference of the first roller 733 and the number of revolutions. When the movement distance of the welded pipe reaches the set value of the cutting length, the second driver 63 drives the circular ring 66 to rotate counterclockwise, and the clamping blocks 64 clamp the welded pipe to achieve length cutting of the welded pipe; Step four, when the welded pipe is rotating cutting, the second roller 744 is in contact with the welded pipe by the spring 743 elastic force, the second roller 744 rolls on the welded pipe, when the surface curvature of the welded pipe is consistent, the contact point 745 keeps static state, the electric resistance wire 747 has different electric length, and the current has no change, once the surface of the welded pipe has concave-convex change, the second roller 744 moves, the contact point 745 moves along with the second roller 744, the electric resistance wire 747 has change in electric length, and then the current changes, whether the current changes is relied on to detect whether the welded pipe has deformity, and the use risk is avoided.

[0028] The above is only the preferred embodiment of the present application, it should be pointed out that, for those skilled in the art, without departing from the concept of the present application, can also make several deformation and improvement, these should also be considered as the protection scope of the present application, these will not affect the effect and the practicality of the patent of the present application.

Claims

1. A positioning device for cutting high-frequency welded pipes, comprising a base (1), characterized in that, A cutting mechanism (2) is installed on the front end of the upper surface of the base (1). The cutting mechanism (2) cuts the welded pipe. A controller (3) is installed on the right side wall of the cutting mechanism (2). A support plate (4) is installed on the rear side of the upper surface of the base (1). A first driver (5) electrically connected to the controller (3) is installed at the center of the bottom front of the support plate (4). Centering clamping mechanisms (6) are installed on both the left and right sides of the support plate (4) through bearings. The centering clamping mechanism (6) centers and clamps the welded pipe. The first driver (5) drives the centering clamping mechanism (6) to rotate, so that the welded pipe can be rotated and cut. Two detection mechanisms (7) are installed on the rear side of the base (1) in opposite directions. They can not only measure the length of the welded pipe movement, but also detect whether the welded pipe is deformed. The centering clamping mechanism (6) includes a housing (61) mounted on the outer wall of the support plate (4) via bearings. A plurality of teeth (62) that mesh with the first driver (5) are mounted circumferentially on the outer wall of the housing (61). The first driver (5) cooperates with the teeth (62) to drive the housing (61) to rotate. A second driver (63) electrically connected to the controller (3) is mounted on the front of the housing (61). At least three clamps are inserted circumferentially into the inner side of the housing (61). When the clamping block (64) moves inward, it centers and clamps the welded pipe. A rod (65) is installed on the outer side of the outer wall of the clamping block (64). A rotatable ring (66) is installed in the inner cavity of the outer shell (61). The outer wall of the ring (66) is provided with the same number of grooves (67) as the clamping block (64) along the circumferential direction. The rod (65) is inserted into the inner cavity of the groove (67). An external toothed ring (68) that meshes with the second driver (63) is installed on the outer wall of the ring (66).

2. The positioning device for high-frequency welded pipe production and cutting according to claim 1, characterized in that, Several of the grooves (67) are distributed clockwise on the outer wall of the ring (66).

3. The positioning device for high-frequency welded pipe production and cutting according to claim 2, characterized in that, The detection mechanism (7) includes an electric slide (71) installed on the rear side of the base (1). The electric slide (71) is electrically connected to the controller (3). A switching component (72) is installed on the moving end of the electric slide (71). A ranging component (73) and a deformity detection component (74) are respectively installed on the front and rear ends of the left side wall of the switching component (72). The ranging component (73) and the deformity detection component (74) are brought close to the welded pipe by the electric slide (71), while the switching component (72) makes the ranging component (73) and the deformity detection component (74) alternately detect the welded pipe.

4. The positioning device for high-frequency welded pipe production and cutting according to claim 3, characterized in that, The switching assembly (72) includes a housing (721) installed on the moving end of the electric slide (71), a ranging assembly (73) and a deformity detection assembly (74) inserted into the left side wall of the housing (721), a rotary cylinder (722) electrically connected to the controller (3) is installed on the right side of the inner cavity of the housing (721), a swing arm (723) is installed at the output end of the rotary cylinder (722), and a connecting rod (724) is installed at both ends of the swing arm (723) through a pin. The other ends of the two connecting rods (724) are respectively connected to the ranging assembly (73) and the deformity detection assembly (74) through a pin. When the rotary cylinder (722) drives the swing arm (723) to rotate, the connecting rod (724) pulls the ranging assembly (73) and the deformity detection assembly (74) to move in the opposite direction.

5. The positioning device for high-frequency welded pipe production and cutting according to claim 4, characterized in that, The ranging component (73) includes a first hollow column (731) inserted into the front end of the left side wall of the housing (721). The right end of the first hollow column (731) is connected to the connecting rod (724) via a pin. A support base (732) is installed on the left end of the first hollow column (731). A first roller (733) capable of rolling is installed in the inner cavity of the support base (732). A drive gear (734) is installed at the center of the first roller (733) via a pin. A rotating gear is installed at the top of the first hollow column (731) via a bearing. Shaft (735), the upper and lower ends of the shaft (735) are respectively equipped with driven gear (736) and speed sensor (737), and driven gear (736) is meshed with driving gear (734), while speed sensor (737) is installed on the inner wall of the first hollow column (731). Speed ​​sensor (737) is also electrically connected to controller (3). Speed ​​sensor (737) calculates the number of rotations of driven gear (736). The product of the number of rotations and the circumference of the first roller (733) is the distance the welded pipe moves.

6. The positioning device for high-frequency welded pipe production and cutting according to claim 5, characterized in that, The horizontal line of the first roller (733) overlaps with the plane where the center line of the outer shell (61) is located.

7. The positioning device for high-frequency welded pipe production and cutting according to claim 6, characterized in that, The driving gear (734) and the driven gear (736) are the same size.

8. The positioning device for high-frequency welded pipe production and cutting according to claim 7, characterized in that, The deformity detection component (74) includes a second hollow column (741) inserted into the rear end of the left side wall of the housing (721). A limiting rod (742) is inserted into the left side wall of the second hollow column (741). A spring (743) is inserted into the inner cavity of the second hollow column (741). Under the elastic force of the spring (743), the limiting rod (742) is pushed to the left. A second roller (744) capable of rolling is installed at the left end of the limiting rod (742). The elastic force of the spring (743) increases the rolling force of the second roller (744). The limit rod (742) is equipped with a contact (745) electrically connected to the controller (3) at the right end of the front side. The contact (745) prevents the limit rod (742) from disengaging from the second hollow column (741). An insulator (746) is installed at the front end of the inner cavity of the second hollow column (741). A resistance wire (747) is wound around the outer wall of the insulator (746). The right end of the resistance wire (747) is electrically connected to the controller (3), and the contact (745) contacts the resistance wire (747).

9. The positioning device for high-frequency welded pipe production and cutting according to claim 8, characterized in that, The centerline of the insulator (746) is parallel to the moving direction of the limiting rod (742).

Images