Seam leveling device for welded steel pipes

Abstract

This utility model relates to the technical field of weld seam leveling equipment, and particularly to a weld seam leveling device for welded steel pipes. The device comprises the following structure: several bearing blocks are sequentially and movably arranged within the inner cavity of the welded steel pipe along its axial direction; several inner leveling wheels are movably arranged within the inner cavity of the welded steel pipe and evenly distributed around the circumferential outer sides of the bearing blocks, used for leveling the inner weld seams of the welded steel pipe; several expansion mechanisms are respectively arranged on the inner leveling wheels and connected to the bearing blocks; an assembly mechanism is arranged on the bearing blocks; and a traction mechanism is arranged on the main body of the device and connects the welded steel pipe to the assembly mechanism, used for traction of the bearing blocks. This device utilizes the assembly mechanism to adjust the expansion degree of the several expansion mechanisms, making the inner leveling wheels suitable for leveling the inner weld seams of welded steel pipes with different inner diameters, thus solving the problem in the prior art of difficulty in leveling the inner weld seams of welded steel pipes of different specifications.

Description

Technical Field

[0001] This utility model relates to the technical field of weld seam leveling equipment, and in particular to a weld seam leveling device for welded steel pipes. Background Technology

[0002] Welded steel pipe, also known as welded steel pipe, is a steel pipe made by rolling steel plates or strips into shape and then welding the seams. It is widely used in industrial, construction and civil fields. In the production process of welded steel pipe, it is usually necessary to use a weld seam leveling device to level the weld seams of the welded steel pipe.

[0003] In the prior art, Chinese utility model patent with authorization announcement number CN210173174U proposes a weld seam leveling device, including a worktable. Both ends of the worktable are provided with screw support plates, and the end of the worktable is provided with an electric push rod support plate. The screw support plate has a screw mounting groove, one end of which is equipped with a servo motor, and the other end with a screw support seat. A screw is installed in the screw mounting groove, one end of which is connected to the servo motor, and the other end to the screw support seat. A cylinder is installed on the screw, and the servo motor drives the screw to rotate. The screw drives the cylinder to slide in the screw mounting groove. One end of the cylinder is mounted on the screw, and the other end is equipped with an outer leveling wheel, which is driven to move by the cylinder. An electric push rod is installed on the electric push rod support plate, and an inner leveling wheel mounting plate is provided at the front end of the electric push rod. Inner leveling wheels are provided at both ends of the inner leveling wheel mounting plate, and the electric push rod drives the inner leveling wheels to move back and forth.

[0004] For the aforementioned weld leveling equipment, the distance between a pair of inner leveling wheels mounted on the inner leveling wheel mounting plate cannot be adjusted, which leads to the problem that the equipment is not suitable for leveling the inner welds of welded steel pipes of different specifications. Utility Model Content

[0005] To address the technical problems existing in the prior art, this utility model provides a weld seam leveling device for welded steel pipes, comprising: The main body of the equipment is used to level the outer weld seam of the welded steel pipe. Several bearing blocks are movably set in the inner cavity of the welded steel pipe, and the several bearing blocks are arranged sequentially along the axial direction of the welded steel pipe; Several inner leveling wheels are movably set in the inner cavity of the welded steel pipe. The several inner leveling wheels are evenly distributed on the circumferential outer side of several bearing blocks. The position of any inner leveling wheel corresponds to the slit between a pair of adjacent bearing blocks, and is used to level the inner weld of the welded steel pipe. Several expansion mechanisms are respectively set on several inner leveling wheels, and each expansion mechanism is connected to a pair of adjacent bearing blocks; An assembly mechanism, mounted on several support blocks, is used to adjust the width of the slits between the support blocks. The traction mechanism is installed on the main body of the equipment. The traction mechanism is fixedly connected to the seamed steel pipe and connected to the assembly mechanism. It is used to traction several load-bearing blocks.

[0006] Furthermore, the expansion mechanism includes: a pair of connectors, the head ends of which are rotatably connected to the inner leveling wheel, and the tail ends of which are rotatably connected to one of a pair of adjacent bearing blocks, for assembling the inner leveling wheel onto the bearing block.

[0007] Furthermore, the assembly mechanism includes: The screw hole is located on the first bearing block; The adapter hole is located on the last bearing block; Several assembly holes are respectively opened on the remaining support blocks; The screw is rotatably connected to the adapter hole, threadedly connected to the screw hole, and movably inserted into several assembly holes. Both ends of the screw are connected to the traction mechanism. Several return springs are respectively set in the slits between several bearing blocks. The two ends of any one return spring are connected to a pair of adjacent bearing blocks to elastically support the bearing blocks.

[0008] Furthermore, the traction mechanism includes: A pair of positioning components are fixedly installed on the main body of the equipment. The pair of positioning components are connected to the welded steel pipe and are used to position the welded steel pipe. A pair of pulley systems are respectively mounted on a pair of positioning components; A pair of traction ropes are respectively set on a pair of pulley blocks. One end of the traction rope is connected to the main body of the equipment, and the other end of the traction rope is connected to the assembly mechanism. They are used to pull several bearing blocks to move axially along the seamed steel pipe.

[0009] Furthermore, the positioning component includes: The load-bearing component is fixedly installed on the main body of the equipment and is connected to the seamless steel pipe. The fastener is detachably assembled onto the load-bearing component. The fastener is connected to the welded steel pipe and is fixedly connected to one of the pulley blocks. It is used to position the welded steel pipe.

[0010] Furthermore, the pulley system includes: The assembly frame is fixedly mounted on top of the fastener; A pair of fixed pulleys are rotatably mounted on the assembly frame. The traction rope is movably sleeved on the pair of fixed pulleys. The middle section of the traction rope passes through the gap between one of the fixed pulleys and the top wall of the inner cavity of the assembly frame, and the middle section of the traction rope passes through the gap between the other fixed pulley and the bottom wall of the inner cavity of the assembly frame.

[0011] Furthermore, the main body of the equipment includes: Platform; The leveling frame is movably mounted on top of the bearing platform. The leveling frame is connected to the traction mechanism, and the seamless steel pipe passes through the inner cavity of the leveling frame. The drive mechanism is set on the bearing platform and is connected to the leveling frame. It is used to drive the leveling frame to slide back and forth along the axial direction of the seamed steel pipe. The leveling mechanism, set on the leveling frame, is used to level the outer weld seam of the welded steel pipe.

[0012] Furthermore, the drive mechanism includes: A pair of guide rods are fixedly installed on the top of the bearing platform. The pair of guide rods are slidably connected to the leveling frame, and any one of the guide rods is arranged in parallel with the seamed steel pipe. A pair of first electric telescopic rods are fixedly installed on the top of the bearing platform. The actuators of the pair of first electric telescopic rods are respectively connected to the leveling frame and are used to drive the leveling frame to slide back and forth along the axial direction of the guide rod.

[0013] Furthermore, the leveling mechanism includes: The fixed frame is fixedly installed on the leveling frame. The first outer leveling wheel is rotatably mounted on the fixed frame. The first outer leveling wheel is located between the seamless steel pipe and the bearing platform and is used to support the seamless steel pipe. The movable frame is set within the inner cavity of the leveling frame; The second outer leveling wheel is rotatably mounted on the movable frame. The position of the second outer leveling wheel matches the outer weld of the welded steel pipe, and is used to level the outer weld of the welded steel pipe. The second electric telescopic rod is fixedly installed on the top of the leveling frame. The actuator of the second electric telescopic rod is connected to the movable frame and is used to drive the movable frame to rise and fall.

[0014] Furthermore, the main body of the equipment also includes: several nozzles, which are fixedly installed on the leveling frame. The water outlet of the nozzles corresponds to the position of the outer weld of the welded steel pipe. Any nozzle is connected to an external water supply device through a hose to spray a cooling water solution onto the outer weld of the welded steel pipe.

[0015] The weld seam leveling device for welded steel pipes according to the embodiments of this utility model has the following beneficial effects: 1. This device uses an assembly mechanism to adjust the slit width between several bearing blocks, thereby adjusting the outward expansion degree of several expansion mechanisms. This allows several inner leveling wheels of the device to fit against the inner wall of welded steel pipes of different specifications, thus achieving the purpose of leveling the inner weld of welded steel pipes of different inner diameters. This solves the problem in the prior art that it is difficult to level the inner weld of welded steel pipes of different specifications.

[0016] 2. This device provides elastic support to the bearing blocks by setting a return spring in the slit between the bearing blocks. The purpose of this is to enhance the structural stability of the several expansion mechanisms, so that the user can observe the degree of outward expansion of the several expansion mechanisms, thereby enhancing the ease of use of this device.

[0017] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0018] Figure 1 This is a perspective view according to an embodiment of the present utility model; Figure 2 This is an assembly diagram of the assembly mechanism according to an embodiment of the present utility model; Figure 3 This is an exploded view of the assembly mechanism according to an embodiment of the present utility model; Figure 4 This is an assembly diagram of the main body of the device according to an embodiment of the present utility model.

[0019] Explanation of reference numerals in the attached diagram: 1-Main body of equipment; 11-Bearing platform; 12-Leveling frame; 13-Drive mechanism; 131-Guide rod; 132-First electric telescopic rod; 141-Fixed frame; 142-First outer leveling wheel; 143-Modible frame; 144-Second outer leveling wheel; 145-Second electric telescopic rod; 15-Sprayer head; 2-Bearing block; 3-Inner leveling wheel; 4-Expansion mechanism; 41-Connector; 51-Screw hole; 52-Adapter hole; 53-Assembly hole; 54-Screw; 55-Reset spring; 6-Traction mechanism; 61-Positioning component; 611-Bearing component; 612-Fixed component; 62-Pulley block; 621-Assembly frame; 622-Fixed pulley; 63-Traction rope; 7-Seamed steel pipe. Detailed Implementation

[0020] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0021] The foregoing and other technical contents, features, and effects of this utility model will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front, or back, are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the present utility model. Furthermore, in all embodiments, the same reference numerals denote the same elements.

[0022] First, combine Figures 1-4 The description of the weld seam leveling device for welded steel pipe 7 according to the embodiments of the present utility model is used for leveling the weld seam of welded steel pipe 7, and its application scenarios are wide.

[0023] Specifically, such as Figure 1 , 2 As shown, the weld seam leveling device for welded steel pipe 7 according to this utility model embodiment includes: a main body 1, a plurality of bearing blocks 2, a plurality of inner leveling wheels 3, a plurality of expansion mechanisms 4, an assembly mechanism, and a traction mechanism 6; the main body 1 is used to level the outer weld seam of the welded steel pipe 7; the plurality of bearing blocks 2 are movably disposed in the inner cavity of the welded steel pipe 7, and the plurality of bearing blocks 2 are arranged sequentially along the axial direction of the welded steel pipe 7; the plurality of inner leveling wheels 3 are movably disposed in the inner cavity of the welded steel pipe 7, and the plurality of inner leveling wheels 3 are evenly distributed on the circumferential outer side of the plurality of bearing blocks 2, any one of which The position of each inner leveling wheel 3 corresponds to the slit between a pair of adjacent bearing blocks 2, and is used to level the inner weld seam of the welded steel pipe 7; several expansion mechanisms 4 are respectively set on several inner leveling wheels 3, and each expansion mechanism 4 is connected to a pair of adjacent bearing blocks 2; an assembly mechanism is set on several bearing blocks 2, and is used to adjust the width of the slit between several bearing blocks 611; a traction mechanism 6 is set on the main body 1 of the equipment, the traction mechanism 6 is fixedly connected to the welded steel pipe 7, the traction mechanism 6 is connected to the assembly mechanism, and is used to traction several bearing blocks 2.

[0024] Furthermore, such as Figure 2 , 3 As shown, the expansion mechanism 4 includes: a pair of connectors 41, the head ends of which are rotatably connected to the inner leveling wheel 3, and the tail ends of which are rotatably connected to one of a pair of adjacent bearing blocks 2, for assembling the inner leveling wheel 3 onto the bearing block 2.

[0025] Furthermore, such as Figure 2 , 3As shown, the assembly mechanism includes: a screw hole 51, a transition hole 52, several assembly holes 53, a screw 54, and several return springs 55. The screw hole 51 is located on the first bearing block 2; the transition hole 52 is located on the last bearing block 2; the several assembly holes 53 are respectively located on the remaining bearing blocks 2; the screw 54 is rotatably connected to the transition hole 52, the screw 54 is threadedly connected to the screw hole 51, and the screw 54 is movably inserted into the several assembly holes 53. Both ends of the screw 54 are connected to the traction mechanism 6; the several return springs 55 are respectively arranged in the slits between the several bearing blocks 2, and both ends of any one return spring 55 are respectively connected to a pair of adjacent bearing blocks 2 for elastic support of the bearing blocks 2.

[0026] In this embodiment, the device provides elastic support to the support blocks 2 by setting a return spring 55 in the slit between the support blocks 2. The purpose is to enhance the structural stability of the plurality of expansion mechanisms 4 so that the user can observe the degree of outward expansion of the plurality of expansion mechanisms 4.

[0027] Furthermore, such as Figure 1 , 2 As shown in Figure 4, the traction mechanism 6 includes: a pair of positioning components 61, a pair of pulley blocks 62, and a pair of traction ropes 63; the pair of positioning components 61 are fixedly mounted on the equipment body 1, and the pair of positioning components 61 are connected to the seamed steel pipe 7 for positioning the seamed steel pipe 7; the pair of pulley blocks 62 are respectively mounted on the pair of positioning components 61; the pair of traction ropes 63 are respectively mounted on the pair of pulley blocks 62, one end of the traction rope 63 is connected to the leveling frame 12 of the equipment body 1, and the other end of the traction rope 63 is connected to the end of the screw 54 of the assembly mechanism for pulling several bearing blocks 2 back and forth along the axial direction of the seamed steel pipe 7.

[0028] Furthermore, such as Figure 1 , 4 As shown, the positioning component 61 includes: a carrier 611 and a fixing component 612; the carrier 611 is fixedly mounted on the main body 1 of the equipment and is connected to the welded steel pipe 7; the fixing component 612 is detachably assembled on the carrier 611 and is connected to the welded steel pipe 7. The fixing component 612 is fixedly connected to one of the pulley blocks 62 and is used to position the welded steel pipe 7.

[0029] Furthermore, such as Figure 1 , 4As shown, the pulley block 62 includes: an assembly frame 621 and a pair of fixed pulleys 622; the assembly frame 621 is fixedly mounted on the top of the fixing member 612; the pair of fixed pulleys 622 are rotatably mounted on the assembly frame 621, and the traction rope 63 is movably sleeved on the pair of fixed pulleys 622. The middle section of the traction rope 63 passes through the gap between one of the fixed pulleys 622 and the top wall of the inner cavity of the assembly frame 621, and the middle section of the traction rope 63 passes through the gap between the other fixed pulley 622 and the bottom wall of the inner cavity of the assembly frame 621.

[0030] Furthermore, such as Figure 1 , 2 As shown in Figure 4, the main body 1 of the equipment includes: a bearing platform 11, a leveling frame 12, a drive mechanism 13, and a leveling mechanism; the leveling frame 12 is movably mounted on the top of the bearing platform 11, and the leveling frame 12 is connected to the traction mechanism 6, through which the welded steel pipe 7 passes; the drive mechanism 13 is mounted on the bearing platform 11, and is connected to the leveling frame 12, for driving the leveling frame 12 to slide back and forth along the axial direction of the welded steel pipe 7; the leveling mechanism is mounted on the leveling frame 12, for leveling the outer weld of the welded steel pipe 7.

[0031] Furthermore, such as Figure 1 , 4 As shown, the drive mechanism 13 includes: a pair of guide rods 131 and a pair of first electric telescopic rods 132; the pair of guide rods 131 are fixedly installed on the top of the bearing platform 11, and the pair of guide rods 131 are slidably connected to the leveling frame 12 respectively, with any one of the guide rods 131 arranged in parallel with the seamed steel pipe 7; the pair of first electric telescopic rods 132 are fixedly installed on the top of the bearing platform 11, and the actuators of the pair of first electric telescopic rods 132 are respectively connected to the leveling frame 12 for driving the leveling frame 12 to slide back and forth along the axial direction of the guide rods 131.

[0032] Furthermore, such as Figure 1 , 2 As shown in Figure 4, the leveling mechanism includes: a fixed frame 141, a first outer leveling wheel 142, a movable frame 143, a second outer leveling wheel 144, and a second electric telescopic rod 145; the fixed frame 141 is fixedly mounted on the leveling frame 12; the first outer leveling wheel 142 is rotatably mounted on the fixed frame 141, and is located between the welded steel pipe 7 and the bearing platform 11, for supporting the welded steel pipe 7; the movable frame 143 is movably mounted in the inner cavity of the leveling frame 12; the second outer leveling wheel 144 is rotatably mounted on the movable frame 143, and the position of the second outer leveling wheel 144 matches the outer weld of the welded steel pipe 7, for leveling the outer weld of the welded steel pipe 7; the second electric telescopic rod 145 is fixedly mounted on the top of the leveling frame 12, and the actuator of the second electric telescopic rod 145 is connected to the movable frame 143, for driving the movable frame 143 to rise and fall.

[0033] Furthermore, such as Figure 1 , 4 As shown, the main body 1 of the equipment also includes: several nozzles 15; the several nozzles 15 are fixedly installed on the leveling frame 12, and the water outlet of the several nozzles 15 corresponds to the position of the outer weld of the seam steel pipe 7. Any nozzle 15 is connected to the external water supply equipment through a hose so that the water supply equipment can spray cooling water solution to the outer weld position of the seam steel pipe 7 through the hose and the nozzle 15.

[0034] Before the equipment is operated, the user inserts the welded steel pipe 7 to be processed between the first outer leveling wheel 142 and the second outer leveling wheel 144, and uses the bearing member 611 and the fixing member 612 to clamp and fix both ends of the welded steel pipe 7. Then, the user inserts several bearing blocks 2, as well as the screws 54, several springs, several expansion mechanisms 4 and several inner leveling wheels 3 set on them into the inner cavity of the welded steel pipe 7, and connects the two ends of the traction rope 63 to the screws 54 and the leveling frame 12 respectively. Finally, the second electric telescopic rod 145 drives the movable frame 143 to descend, and uses the first outer leveling wheel 142 and the second outer leveling wheel 144 to clamp and fix the welded steel pipe 7.

[0035] When the equipment is running, the first electric telescopic rod 132 drives the leveling frame 12 to slide back and forth along the axial direction of a pair of guide rods 131. During this process, the first outer leveling wheel 142 and the second outer leveling wheel 144, which are located in the inner cavity of the leveling frame 12, cooperate to squeeze the welded steel pipe 7, thereby using the first outer leveling wheel 142 to level the outer weld of the welded steel pipe 7. During the process of the leveling frame 12 sliding back and forth along the axial direction of the pair of guide rods 131, the leveling frame 12 pulls the screw 54 and the screw 54 through the traction rope 63. Several bearing blocks 2, several springs, several expansion mechanisms 4, and several inner leveling wheels 3 move back and forth along the axial direction of the welded steel pipe 7, thereby using the inner leveling wheels 3 corresponding to the inner weld of the welded steel pipe 7 to perform leveling processing on the inner weld. In this embodiment, the user can adjust the slit width between several bearing blocks 2 by rotating the drive screw 54, and then adjust the outward expansion degree of the connecting parts 41 of several expansion mechanisms 4, so as to make the device suitable for leveling processing of the inner weld of welded steel pipes 7 of various specifications.

[0036] Above, refer to Figures 1-4 The weld seam leveling device for welded steel pipe 7 according to an embodiment of the present invention is described, and has the following beneficial effects: 1. This device uses an assembly mechanism to adjust the slit width between several bearing blocks 2, thereby adjusting the outward expansion degree of several expansion mechanisms 4. This allows several inner leveling wheels 3 of the device to fit against the inner cavity sidewalls of welded steel pipes 7 of different specifications, thereby achieving the purpose of leveling the inner weld seams of welded steel pipes 7 of different inner diameters. This solves the problem in the prior art that it is difficult to level the inner weld seams of welded steel pipes 7 of different specifications.

[0037] 2. This device provides elastic support to the bearing blocks 2 by setting a return spring 55 in the slit between the bearing blocks 2. The purpose is to enhance the structural stability of the several expansion mechanisms 4, so that the user can observe the degree of outward expansion of the several expansion mechanisms 4, thereby enhancing the ease of use of this device.

[0038] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0039] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A seam leveling device for welded steel pipes, characterized in that, Include: The main body of the equipment is used to level the outer weld seam of the welded steel pipe. Several bearing blocks are movably disposed in the inner cavity of the welded steel pipe, and the several bearing blocks are arranged sequentially along the axial direction of the welded steel pipe; Several inner leveling wheels are movably arranged in the inner cavity of the welded steel pipe. The several inner leveling wheels are evenly distributed on the circumferential outer side of the several bearing blocks. The position of any one of the inner leveling wheels corresponds to the slit between a pair of adjacent bearing blocks, and is used to level the inner weld of the welded steel pipe. Several expansion mechanisms are respectively installed on the several inner leveling wheels, and each of the expansion mechanisms is connected to a pair of adjacent bearing blocks; An assembly mechanism is provided on the plurality of support blocks and is used to adjust the width of the slits between the plurality of support blocks; A traction mechanism is installed on the main body of the equipment. The traction mechanism is fixedly connected to the seamed steel pipe and connected to the assembly mechanism. It is used to traction the plurality of bearing blocks.

2. The weld seam leveling device for welded steel pipes as described in claim 1, characterized in that, The expansion mechanism includes: a pair of connectors, the head ends of which are rotatably connected to the inner leveling wheel, and the tail ends of which are rotatably connected to one of a pair of adjacent bearing blocks, for assembling the inner leveling wheel onto the bearing block.

3. The weld seam leveling device for welded steel pipes as described in claim 1, characterized in that, The assembly mechanism includes: A screw hole is formed on the first bearing block; An adapter hole is provided on the bearing block located at the end; Several assembly holes are respectively formed on the remaining support blocks; The screw is rotatably connected to the adapter hole, the screw is threadedly connected to the screw hole, the screw is movably inserted into the plurality of assembly holes, and both ends of the screw are connected to the traction mechanism; Several return springs are respectively disposed in the slits between the several bearing blocks, and the two ends of any one of the return springs are respectively connected to a pair of adjacent bearing blocks for elastic support of the bearing blocks.

4. The weld seam leveling device for welded steel pipes as described in claim 1, characterized in that, The traction mechanism includes: A pair of positioning components are fixedly mounted on the main body of the equipment. The pair of positioning components are connected to the welded steel pipe and are used to position the welded steel pipe. A pair of pulley blocks are respectively mounted on the pair of positioning components; A pair of traction ropes are respectively set on the pair of pulley blocks. One end of the traction rope is connected to the main body of the equipment, and the other end of the traction rope is connected to the assembly mechanism. They are used to pull the plurality of bearing blocks to move axially along the seamed steel pipe.

5. The weld seam leveling device for welded steel pipes as described in claim 4, characterized in that, The positioning component includes: A support component is fixedly mounted on the main body of the equipment, and the support component is connected to the seamed steel pipe; The fastener is detachably mounted on the bearing member, the fastener is connected to the seamed steel pipe, and the fastener is fixedly connected to one of the pulley blocks for positioning the seamed steel pipe.

6. The weld seam leveling device for welded steel pipes as described in claim 5, characterized in that, The pulley system includes: The assembly frame is fixedly mounted on top of the fastener; A pair of fixed pulleys are rotatably mounted on the assembly frame. The traction rope is movably sleeved on the pair of fixed pulleys. The middle section of the traction rope passes through the gap between one of the fixed pulleys and the top wall of the inner cavity of the assembly frame, and the middle section of the traction rope passes through the gap between the other fixed pulley and the bottom wall of the inner cavity of the assembly frame.

7. The weld seam leveling device for welded steel pipes as described in claim 1, characterized in that, The main body of the device includes: Platform; A leveling frame is movably mounted on top of the bearing platform. The leveling frame is connected to the traction mechanism, and the seamless steel pipe passes through the inner cavity of the leveling frame. A driving mechanism is provided on the bearing platform. The driving mechanism is connected to the leveling frame and is used to drive the leveling frame to slide back and forth along the axial direction of the seamed steel pipe. A leveling mechanism, mounted on the leveling frame, is used to level the outer weld seam of the welded steel pipe.

8. The weld seam leveling device for welded steel pipes as described in claim 7, characterized in that, The drive mechanism includes: A pair of guide rods are fixedly installed on the top of the bearing platform. The pair of guide rods are slidably connected to the leveling frame, and any one of the guide rods is arranged in parallel with the seamed steel pipe. A pair of first electric telescopic rods are fixedly installed on the top of the bearing platform. The actuators of the pair of first electric telescopic rods are respectively connected to the leveling frame and are used to drive the leveling frame to slide back and forth along the axial direction of the guide rod.

9. The weld seam leveling device for welded steel pipes as described in claim 7, characterized in that, The leveling mechanism includes: A fixed frame is fixedly mounted on the leveling frame; The first outer leveling wheel is rotatably mounted on the fixed frame. The first outer leveling wheel is located between the seamless steel pipe and the bearing platform and is used to support the seamless steel pipe. The movable frame is movably disposed within the inner cavity of the leveling frame; The second outer leveling wheel is rotatably mounted on the movable frame. The position of the second outer leveling wheel matches the outer weld of the welded steel pipe, and is used to level the outer weld of the welded steel pipe. The second electric telescopic rod is fixedly installed on the top of the leveling frame. The actuator of the second electric telescopic rod is connected to the movable frame and is used to drive the movable frame to rise and fall.

10. The weld seam leveling device for welded steel pipes as described in claim 7, characterized in that, The main body of the equipment also includes: several nozzles, which are fixedly installed on the leveling frame. The water outlet of the nozzles corresponds to the position of the outer weld of the welded steel pipe. Each nozzle is connected to an external water supply device through a hose for spraying a cooling water solution onto the outer weld of the welded steel pipe.

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