A real-time adjustable five-roll extrusion device for square thick pipe welding

Abstract

The present invention relates to the technical field of welded pipe production equipment, and specifically to a real-time distance-adjustable five-roller extrusion device for welding square thick pipes, comprising a base with a lower roller installed, and a side roller adjustment device with side rollers installed and an upper roller adjustment device with upper rollers, which are arranged on the base from bottom to top. The lower roller, the side rollers and the upper roller cooperate with each other to complete the rolling operation of the square pipe body; the design device of the present invention can concentrate the force of the rollers on the square pipe body at one point, and the structural force supporting the upper roller in the device and the reaction force from the square pipe are in the same vertical plane, avoiding the phenomenon that the upper roller will tilt backward when the overall downward pressure is applied; at the same time, the design device of the present invention can adjust the positions of all rollers through a motor throughout the entire process, that is, the parameters are adjusted in real time during the operation of the device without the need for shutdown operation.

Description

Technical Field

[0001] The invention relates to the technical field of welded pipe production equipment, in particular to a real-time distance-adjustable five-roller extrusion device for welding square thick pipes. Background Art

[0002] Large-diameter, square, thick-walled pipes are made from steel plates or strips, cold-bent, and then high-frequency welded. They are widely used in many industries. Currently, the industry mostly uses roll forming to weld the butt joints of square thick pipes. With technological advancements, a number of "five-roll extrusion devices" have emerged for roll forming:

[0003] For example, patent CN215697074U designs a five-roll extruder for high-frequency welded pipe forming. The device is symmetrically arranged with two horizontal side extrusion rollers, a support roller is provided in the lower middle part of the two side extrusion rollers, and two inclined upper extrusion rollers are symmetrically arranged above the support rollers. The high-frequency welded pipe product is located in the middle of the five rollers.

[0004] The above-mentioned device, through the coordination of five rollers, can match the working surfaces of each roller to cover the outer surface of the high-frequency welded pipe product, thereby producing round pipes that meet the process requirements. However, there is still room for improvement in the structural design of this device: for example, the adjustment of the upper roller and side rollers must be completed before the device is operated, and close-to-machine operation is not allowed during operation. The entire pipe must be rolled before the machine can be stopped to adjust the parameters, resulting in low production efficiency. In addition, the structural support force of the upper roller of the device and the direction of the reaction force from the pipe are not in the same vertical plane, causing the upper roller to tilt backward when the overall downward pressure is applied. The thicker the wall of the rolled pipe, the more obvious this phenomenon is.

[0005] The above problems also exist in patent CN215998193U: this patent designs a five-roller extrusion device for adjusting the distance between pipes and rolling forming. Compared with patent CN215697074U, it introduces a motor-controlled roller. However, this "motor control" only controls the downward pressure of the two upper rollers and synchronously adjusts the horizontal position of the two side rollers. It cannot strictly control the precise position of a single upper roller or side roller. Moreover, the problem of backward tilting of the upper roller during operation in patent CN215697074U has not been effectively solved in patent CN215998193U: that is, in order to achieve the required pressure applied to the pipe, the entire device needs to provide a greater initial pressure, which will not only lead to energy waste, but also accelerate the mechanical fatigue at the upper roller support point and shorten the life of the device.

[0006] In summary, the technical team of the inventor, based on the advantages of the above-mentioned scheme, improved the structure of the device and designed a five-roller extrusion device that avoids the problem of the upper roller tilting backward at the source of the structure and can accurately adjust the position of each roller during the operation of the device. Summary of the Invention

[0007] To achieve the above objectives, the present invention provides a real-time adjustable distance type five-roller extrusion device for welding square thick tubes. The device can concentrate the force exerted by the rollers on the square tube body at one point, and the structural force supporting the upper rollers in the device and the reaction force from the square tube are in the same vertical plane, thereby preventing the upper rollers from tilting backward when the entire roller is pressed downward. The technical solution is as follows:

[0008] A real-time adjustable five-roll extrusion device for welding square thick tubes includes a base with lower rollers installed, and a side roller adjustment device with side rollers installed and an upper roller adjustment device with upper rollers installed, which are arranged on the base in order from bottom to top. The lower roller, side rollers and upper rollers cooperate with each other to complete the rolling operation of the square tube body.

[0009] The rolling direction of the square tube is used as the observation direction; any plane perpendicular to the observation direction is used as the translation plane; the base is placed horizontally on the translation plane, and the vertical bisector of the lower roller at the center of the base is used as the center line;

[0010] The fixed position of the lower roller can ensure sufficient support force to the bottom surface of the square tube, thereby avoiding weld defects;

[0011] Two side roller mounting brackets are symmetrically arranged on both sides of the upper surface of the base based on the center line;

[0012] The side roller mounting frame is connected to a side roller wheel on the side adjacent to the center line through a side roller worm gear adjustment mechanism and is horizontally slidably connected to the upper surface of the base in the translation plane;

[0013] An upper roller horizontal adjustment mechanism is horizontally slidably connected to the upper surface of the side roller mounting frame; the upper roller horizontal adjustment mechanism includes a gantry, and an upper roller vertical adjustment mechanism is slidably provided in the middle of the gantry arch;

[0014] The upper roller vertical adjustment mechanism includes an upper roller worm gear lifting mechanism passing through the middle of the gantry arch, and an upper roller mounting plate installed at the bottom of the upper roller worm gear lifting mechanism and capable of sliding in the vertical direction;

[0015] Two upper rollers are symmetrically arranged on the upper roller mounting plate based on the center line;

[0016] The contact line between the upper roller and the square tube, as well as the maximum cross-section through the center of the upper roller mounting plate, the gantry and the side roller mounting frame all fall within the translation plane.

[0017] Furthermore, the side roller is rotatably connected in the side roller mounting shell, and the side roller mounting shell is slidably connected to the side roller horizontal slide rail arranged on the upper surface of the base through the side roller horizontal slider arranged at the bottom, and the side of the side roller mounting shell away from the center line is connected to the output end of the side roller worm gear adjustment mechanism through a screw rod.

[0018] By adjusting the drive motor connected to the side roller worm gear adjustment mechanism, the extrusion force brought by the side rollers to the side of the square tube body can be accurately adjusted, so that the edges of the two molten strips can contact each other well.

[0019] Furthermore, the installation deflection of the side roller in the side roller mounting shell is 1°, and the top of the side roller is closer to the center line than the bottom; the installation deflection is defined as the angle between the rotation axis of the side roller and the vertical direction.

[0020] The function of installing the deflection is to apply a downward force to the side of the square tube to prevent the square tube from being constrained to the specified position as soon as possible when entering the device; and secondly, to make the edges of the two molten strips produce over-contact within the controllable range when they come into contact and fuse, so that the height of the formed slag is higher than the upper surface of the square tube, avoiding scratching the upper surface of the square tube during the next process of scraping off the slag, causing damage to the tube.

[0021] Furthermore, the gantry is slidably connected to the upper roller horizontal slide rail arranged on the upper surface of the side roller mounting frame through the upper roller horizontal slider arranged at the bottom;

[0022] A screw support seat is provided on the end of the upper roller horizontal slide rail away from the center line, a screw plug hole is provided on the outer side wall of the gantry frame at a position opposite to the screw support seat, and a screw is horizontally provided in the screw support seat and is screwed into the gantry frame through the screw plug hole.

[0023] By adjusting the depth of the screw rod screwed into the gantry, it is ensured that the roller gap center of the two upper rollers coincides with the weld center of the upper surface of the square tube.

[0024] Furthermore, the upper roller mounting plate is slidably connected to the upper roller vertical slide rails provided on the inner side walls of the gantry via upper roller vertical sliders provided on two side edges parallel to the center line;

[0025] The center top of the upper roller mounting plate is connected to the output end of the upper roller worm gear lifting mechanism through a screw rod.

[0026] By adjusting the drive motor connected to the upper roller worm gear lifting mechanism, the upper roller can be made to reach a suitable height, thereby ensuring that the upper roller exerts sufficient downward pressure on the weld surface of the square tube.

[0027] Furthermore, the upper roller is installed in the upper roller installation shell, and the upper roller installation shell is connected to the output end of the upper roller worm gear adjustment mechanism installed on the upper roller installation plate through a screw rod.

[0028] By adjusting the drive motor of the upper roller worm gear adjustment mechanism, the two upper rollers can be accurately adjusted to the target position, so that the roller gap size between the two upper rollers meets the standard for smooth discharge of slag during welding extrusion.

[0029] Furthermore, a limiting plate is tightly arranged between the upper roller mounting shells symmetrical to the center line, and the limiting plate makes the angle between the upper screw rods of the upper roller mounting shells be 40 degrees.

[0030] The specific size of the angle between the screw rods on the two roller mounting shells is obtained through multiple experiments. At this angle, the stability of the contact surface between the upper roller and the square tube can be effectively guaranteed.

[0031] Furthermore, the conical surface where the upper rollers contact the square tube is the extrusion surface, and the conical surfaces between the upper rollers that are closest and parallel to each other are the roller gap surfaces;

[0032] The angle between the extrusion surface and the circular end surface of the upper roller adjacent to the center line is 20°; the angle between the roller gap surface and the circular end surface of the upper roller away from the center line is 70°.

[0033] The specific data of the tapered surface of the upper roller is calculated based on the angle between the screws on the upper roller mounting shell, and is also to ensure the stability of the contact surface between the upper roller and the square tube.

[0034] Furthermore, scales are provided on the side roller horizontal slide rail, the upper roller horizontal slide rail, and the upper roller vertical slide rail, and pointers are provided on the corresponding side roller horizontal sliders, the upper roller horizontal sliders, and the upper roller vertical sliders.

[0035] The coordination between the scale and the pointer enables on-site technicians to intuitively obtain the adjustment data of each roller, facilitating data recording and troubleshooting.

[0036] Furthermore, the input ends of the side roller worm gear adjustment mechanism, the upper roller worm gear lifting mechanism, and the upper roller worm gear adjustment mechanism are all connected to the drive motor via a speed reducer;

[0037] The reducers on the two side roller worm gear adjustment mechanisms are consistent with the structure of the drive motor; the reducers on the two upper roller worm gear adjustment mechanisms are consistent with the structure of the drive motor.

[0038] The structure of the reducer and the drive motor is consistent so that the corresponding rollers can move at the same speed when adjusting their positions, avoiding range differences caused by speed differences.

[0039] Compared with the existing five-roller extrusion device, the beneficial effects of the present invention are:

[0040] (1) The real-time adjustable distance type five-roller extrusion device designed by the present invention for welding thick square tubes can concentrate the force exerted by the rollers on the square tube body at one point, and the structural force supporting the upper roller in the device and the reaction force from the square tube are in the same vertical plane, which can effectively avoid the phenomenon of the upper roller tilting backward when the upper roller is pressed down as a whole; when the wall of the square tube is thicker, the pressure exerted by the upper roller to close the tube body is greater, which leads to a greater reaction force fed back from the tube body to the upper roller. Therefore, only when the above reaction force can be effectively offset in the vertical direction and no excessive deflection force is generated, can the five-roller extrusion device efficiently process thick-walled tube bodies. Otherwise, excessive deflection force will not only lead to energy waste, but also accelerate mechanical fatigue at the upper roller support point, shortening the life of the device.

[0041] (2) The present invention is designed to have a real-time adjustable five-roller extrusion device for welding square thick tubes. The positions of all rollers can be adjusted manually or by motors throughout the entire process. This allows the device designed by the present invention to not only adjust parameters before the device is operated, but also to adjust parameters in real time during the device operation without stopping the machine, thereby effectively improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a front view of the five-roller extrusion device of the present invention;

[0043] Figure 2 is a top view of the five-roller extrusion device of the present invention;

[0044] Figure 3 is a side view of the five-roller extrusion device of the present invention;

[0045] Figure 4 It is a partial enlarged view of the roller gap of the upper roller of the present invention.

[0046] In the picture:

[0047] 1-upper roller adjustment device, 11-upper roller horizontal adjustment mechanism, 111-gantry, 112-upper roller horizontal slider, 113-upper roller vertical slide, 12-upper roller vertical adjustment mechanism, 121-upper roller mounting plate, 1211-upper roller vertical slider, 122-upper roller mounting shell, 123-upper roller worm gear adjustment mechanism, 124-upper roller, 1241-extrusion surface, 1242-roller gap surface, 125-upper roller worm gear lifting mechanism, 126-limiting plate, 13-screw support seat, 14-screw socket;

[0048] 2-side roller adjustment device, 21-side roller mounting frame, 22-side roller worm gear adjustment mechanism, 23-side roller horizontal slide rail, 24-side roller mounting shell, 241-side roller horizontal slider, 242-side roller, 29-upper roller horizontal slide rail;

[0049] 3-base, 31-lower roller, 4-reducer, 5-drive motor, 6-square tube, 7-screw. DETAILED DESCRIPTION

[0050] In order to further illustrate the method and effect achieved by the present invention, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0051] Example

[0052] The main purpose of this embodiment is to illustrate the structural design of the five-roller extrusion device designed by the present invention under specific parameters, and the content is as follows:

[0053] See also Figures 1 to 3 A five-roller extrusion device with real-time adjustable spacing for welding square thick tubes includes a base 3 equipped with a lower roller 31, and a side roller adjustment device 2 equipped with a side roller 242 and an upper roller adjustment device 1 equipped with an upper roller 124, which are arranged on the base 3 from bottom to top. The lower roller 31, the side roller 242 and the upper roller 124 cooperate with each other to complete the rolling operation of the square tube body 6;

[0054] The rolling forward direction of the square tube 6 is used as the observation direction; any plane perpendicular to the observation direction is used as the translation plane; the base 3 is placed horizontally on the translation plane, with the vertical bisector of the lower roller 31 located at the center of the base 3 as the center line;

[0055] The fixed position of the lower roller 31 can ensure that sufficient support force is provided to the bottom surface of the square tube 6, thereby avoiding weld defects;

[0056] Two side roller mounting brackets 21 are symmetrically provided on both sides of the upper surface of the base 3 based on the center line;

[0057] The side roller mounting frame 21 is connected to a side roller 242 on the side adjacent to the center line through a side roller worm gear adjustment mechanism 22 and is horizontally slidably connected to the upper surface of the base 3 in the translation plane;

[0058] An upper roller horizontal adjustment mechanism 11 is horizontally slidably connected to the upper surface of the side roller mounting frame 21; the upper roller horizontal adjustment mechanism 11 includes a gantry 111, and an upper roller vertical adjustment mechanism 12 is slidably provided in the arched middle portion of the gantry 111;

[0059] The upper roller vertical adjustment mechanism 12 includes an upper roller worm gear lifting mechanism 125 passing through the arched middle portion of the gantry 111, and an upper roller mounting plate 121 mounted at the bottom of the upper roller worm gear lifting mechanism 125 and capable of sliding in the vertical direction;

[0060] Two upper rollers 124 are symmetrically arranged on the upper roller mounting plate 121 based on the center line;

[0061] The contact line between the upper roller 124 and the square tube 6, as well as the maximum cross-section through the center of the upper roller mounting plate 121, the gantry 111 and the side roller mounting frame 21 all fall within the translation plane.

[0062] Specifically, the side roller 242 is rotatably connected in the side roller mounting shell 24, and the side roller mounting shell 24 is slidably connected to the side roller horizontal slide rail 23 arranged on the upper surface of the base 3 through the side roller horizontal slider 241 arranged at the bottom, and the side of the side roller mounting shell 24 away from the center line is connected to the output end of the side roller worm gear adjustment mechanism 22 through the screw rod 7.

[0063] By adjusting the drive motor 5 connected to the side roller worm gear adjustment mechanism 22, the extrusion force brought by the side roller 242 to the side of the square tube 6 can be accurately adjusted, so that the edges of the two molten steel strips can contact each other well.

[0064] Specifically, the installation deflection of the side roller 242 in the side roller mounting shell 24 is 1°, and the top of the side roller 242 is closer to the center line than the bottom; the installation deflection is defined as the angle between the rotation axis of the side roller 242 and the vertical direction.

[0065] The purpose of installing the deflection is, firstly, to apply a downward force to the side of the square tube body 6 to prevent the square tube body 6 from being constrained to the specified position as soon as possible when entering the device; secondly, to make the edges of the two molten strips produce over-contact within the controllable range when they come into contact and fuse, so that the height of the formed slag is higher than the upper surface of the square tube body 6, avoiding scratching the upper surface of the square tube body 6 during the next process of scraping off the slag, causing damage to the tube body.

[0066] Specifically, the gantry 111 is slidably connected to the upper roller horizontal slide rail 29 provided on the upper surface of the side roller mounting frame 21 through the upper roller horizontal slider 112 provided at the bottom;

[0067] A screw support seat 13 is provided on the end of the upper roller horizontal slide rail 29 away from the center line, and a screw plug hole 14 is provided on the outer side wall of the gantry 111 at a position opposite to the screw support seat 13. A screw 7 is horizontally provided in the screw support seat 13 and is screwed into the interior of the gantry 111 through the screw plug hole 14.

[0068] By adjusting the depth of the screw rod 7 screwed into the gantry 111 , it is ensured that the center of the roller gap of the two upper rollers 124 coincides with the center of the weld seam on the upper surface of the square tube 6 .

[0069] Specifically, the upper roller mounting plate 121 is slidably connected to the upper roller vertical slide rail 113 provided on the inner side wall of the gantry 111 through the upper roller vertical sliders 1211 provided on the two side edges parallel to the center line;

[0070] The center top of the upper roller mounting plate 121 is connected to the output end of the upper roller worm gear lifting mechanism 125 through the screw rod 7.

[0071] By adjusting the drive motor 5 connected to the upper roller worm gear lifting mechanism 125, the upper roller 124 can be made to reach a suitable height, thereby ensuring that the upper roller 124 exerts sufficient downward pressure on the weld surface of the square tube body 6.

[0072] Specifically, the upper roller 124 is installed in the upper roller installation shell 122, and the upper roller installation shell 122 is connected to the output end of the upper roller worm gear adjustment mechanism 123 installed on the upper roller installation plate 121 through the screw rod 7.

[0073] By adjusting the driving motor 5 of the upper roller worm gear adjustment mechanism 123, the two upper rollers 124 can be accurately adjusted to the target position, so that the roller gap size between the two upper rollers 124 meets the standard for smooth discharge of slag during welding extrusion.

[0074] Specifically, a limiting plate 126 is tightly disposed between the upper roller mounting shells 122 that are symmetrical about the center line. The limiting plate 126 makes the angle between the upper screw rods 7 of the upper roller mounting shells 122 be 40°.

[0075] The specific size of the angle between the screw rods 7 on the two roller mounting shells 122 is obtained through multiple experiments. At this angle, the stability of the contact surface between the upper roller 124 and the square tube 6 can be effectively guaranteed.

[0076] See Figure 4 The conical surface where the upper rollers 124 contact the square tube 6 is the extrusion surface 1241, and the conical surfaces between the upper rollers 124 that are closest and parallel to each other are the roller gap surfaces 1242;

[0077] The angle between the extrusion surface 1241 and the circular end surface of the upper roller 124 adjacent to the center line is 20°; the angle between the roller gap surface 1242 and the circular end surface of the upper roller 124 away from the center line is 70°.

[0078] The specific data of the conical surface of the upper roller 124 is calculated based on the angle between the upper screw rod 7 of the upper roller mounting shell 122, and is also to ensure the stability of the contact surface between the upper roller 124 and the square tube 6.

[0079] Specifically, scales are provided on the side roller horizontal slide rail 23, the upper roller horizontal slide rail 29, and the upper roller vertical slide rail 113, and pointers are provided on the corresponding side roller horizontal slider 241, the upper roller horizontal slider 112, and the upper roller vertical slider 1211.

[0080] The coordination between the scale and the pointer enables on-site technicians to intuitively obtain the adjustment data of each roller, facilitating data recording and troubleshooting.

[0081] Specifically, the input ends of the side roller worm gear adjustment mechanism 22, the upper roller worm gear lifting mechanism 125, and the upper roller worm gear adjustment mechanism 123 are all connected to the drive motor 5 via the reducer 4;

[0082] On the upper roller worm gear lifting mechanism 125: the speed ratio of the reducer 4 is 56.64, and the power of the drive motor 5 is 4kW.

[0083] The reducers 4 and the drive motor 5 on the two side roller worm gear adjustment mechanisms 22 have the same structure: the speed ratio of the reducer 4 is 25.2, and the power of the drive motor 5 is 4 kW.

[0084] The reducers 4 and the drive motor 5 on the two upper roller worm gear adjustment mechanisms 123 have the same structure: the speed ratio of the reducer 4 is 27.28, and the power of the drive motor 5 is 3 kW.

[0085] The structure of the reducer 4 and the drive motor 5 is consistent so that the corresponding rollers can move at the same speed when adjusting their positions, thereby avoiding range differences caused by speed differences.

Claims

1. A real-time adjustable distance type five-roller extrusion device for welding square thick tubes, comprising a base (3) equipped with a lower roller (31), and a side roller adjustment device (2) equipped with a side roller (242) and an upper roller adjustment device (1) equipped with an upper roller (124) arranged on the base (3) from bottom to top, wherein the lower roller (31), the side roller (242) and the upper roller (124) cooperate with each other to complete the rolling operation of the square tube body (6), and is characterized in that: The rolling forward direction of the square tube (6) is used as the observation direction; any plane perpendicular to the observation direction is used as the translation plane; the base (3) is placed horizontally on the translation plane, and the vertical bisector of the lower roller (31) located at the center of the base (3) is used as the center line; Two side roller mounting frames (21) are symmetrically provided on both sides of the upper surface of the base (3) based on the center line; The side roller mounting frame (21) is connected to a side roller (242) on the side adjacent to the center line through a side roller worm gear adjustment mechanism (22) and is horizontally slidably connected to the upper surface of the base (3) within the translation plane; An upper roller horizontal adjustment mechanism (11) is horizontally slidably connected to the upper surface of the side roller mounting frame (21); the upper roller horizontal adjustment mechanism (11) comprises a gantry (111), and the gantry (111) is slidably connected to an upper roller horizontal slide rail (29) arranged on the upper surface of the side roller mounting frame (21) via an upper roller horizontal slider (112) arranged at the bottom; an upper roller vertical adjustment mechanism (12) is slidably arranged in the arched middle portion of the gantry (111); The upper roller vertical adjustment mechanism (12) comprises an upper roller worm gear lifting mechanism (125) passing through the arched middle portion of the gantry (111), and an upper roller mounting plate (121) mounted at the bottom of the upper roller worm gear lifting mechanism (125) and capable of sliding in a vertical direction; Two upper rollers (124) are symmetrically arranged on the upper roller mounting plate (121) based on the center line; The contact line between the upper roller (124) and the square tube (6), as well as the maximum cross-section through the center of the upper roller mounting plate (121), the gantry (111) and the side roller mounting frame (21) all fall within the translation plane.

2. A real-time adjustable distance type five-roll extrusion device for square thick pipe welding according to claim 1, characterized in that: The side roller (242) is rotatably connected in the side roller mounting shell (24), and the side roller mounting shell (24) is slidably connected to the side roller horizontal slide rail (23) arranged on the upper surface of the base (3) through the side roller horizontal slider (241) arranged at the bottom, and the side of the side roller mounting shell (24) away from the center line is connected to the output end of the side roller worm gear adjustment mechanism (22) through the screw rod (7).

3. A real-time adjustable distance type five-roll extrusion device for square thick pipe welding according to claim 2, characterized in that: The installation deflection of the side roller (242) in the side roller mounting shell (24) is 1°, and the top of the side roller (242) is closer to the center line than the bottom; the installation deflection is defined as the angle between the rotation axis of the side roller (242) and the vertical direction.

4. The real-time adjustable distance type five-roll extrusion device for square thick pipe welding according to claim 1, characterized in that: A screw rod support seat (13) is provided on one end of the upper roller horizontal slide rail (29) away from the center line, a screw rod insertion hole (14) is provided on the outer side wall of the gantry (111) at a position opposite to the screw rod support seat (13), and a screw rod (7) is horizontally provided in the screw rod support seat (13) and is screwed into the interior of the gantry (111) through the screw rod insertion hole (14).

5. The real-time adjustable distance type five-roll extrusion device for square thick pipe welding according to claim 1, characterized in that: The upper roller mounting plate (121) is slidably connected to an upper roller vertical slide rail (113) provided on the inner side wall of the gantry (111) via upper roller vertical sliders (1211) provided on two side edges parallel to the center line; The center top of the upper roller mounting plate (121) is connected to the output end of the upper roller worm gear lifting mechanism (125) through a screw rod (7).

6. The real-time adjustable distance type five-roll extrusion device for square thick pipe welding according to claim 1, characterized in that: The upper roller (124) is installed in the upper roller installation shell (122), and the upper roller installation shell (122) is connected to the output end of the upper roller worm gear adjustment mechanism (123) installed on the upper roller installation plate (121) through a screw rod (7).

7. A real-time adjustable distance type five-roll extrusion device for square thick pipe welding according to claim 6, characterized in that: A limiting plate (126) is tightly arranged between the upper roller mounting shells (122) symmetrical to the center line, and the limiting plate (126) makes the angle between the upper screw rods (7) of the upper roller mounting shells (122) be 40 degrees.

8. The real-time adjustable distance type five-roll extrusion device for square thick pipe welding according to claim 1, characterized in that: The conical surface where the upper rollers (124) contact the square tube (6) is the extrusion surface (1241), and the conical surfaces between the upper rollers (124) that are closest and parallel to each other are the roller gap surfaces (1242); The angle between the extrusion surface (1241) and the circular end surface of the upper roller (124) adjacent to the center line is 20°; the angle between the roller gap surface (1242) and the circular end surface of the upper roller (124) away from the center line is 70°.

9. The real-time adjustable distance type five-roll extrusion device for square thick pipe welding according to claim 1, characterized in that: The side roller horizontal slide rail (23), the upper roller horizontal slide rail (29), and the upper roller vertical slide rail (113) are all provided with scales, and the corresponding side roller horizontal sliders (241), the upper roller horizontal slider (112), and the upper roller vertical slider (1211) are provided with pointers.

10. The real-time adjustable distance type five-roll extrusion device for square thick pipe welding according to claim 1, characterized in that: The input ends of the side roller worm gear adjustment mechanism (22), the upper roller worm gear lifting mechanism (125), and the upper roller worm gear adjustment mechanism (123) are all connected to the drive motor (5) via a speed reducer (4); The models of the reducers (4) and the drive motors (5) on the two side roller worm gear adjustment mechanisms (22) must be consistent; the models of the reducers (4) and the drive motors (5) on the two upper roller worm gear adjustment mechanisms (123) must be consistent.

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