A pipe making machine for hot-dip galvanized steel strip

Abstract

The utility model relates to galvanized steel strip pipe making machine technical field, and disclose a kind of pipe making machine for hot galvanizing steel strip processing, including bed, the left side of the bed is provided with steel band flattening structure, forming structure is provided in the right side of steel band flattening structure, setting box is provided in the right side of forming structure, the both sides port of setting box is provided with air cooling box, the inside of setting box is further provided with slit setting structure, the right side of setting box is provided with welding box, and steel band flattening structure, forming structure and slit setting structure are penetrated with galvanized steel pipe.The pipe making machine for hot galvanizing steel strip processing, by galvanized steel strip sequentially through steel band flattening structure, forming structure and slit setting structure, by steel band flattening structure, the stress generated by the winding of galvanized steel strip can be eliminated, by forming structure, galvanized steel strip can be bent to be steel pipe, and by slit setting structure, steel pipe two sides can be aligned and set, so as to subsequent welding processing.

Description

Technical Field

[0001] This utility model relates to the technical field of galvanized steel strip tube making machines, specifically a tube making machine for hot-dip galvanized steel strip processing. Background Technology

[0002] Hot-dip galvanized steel strip pipe making machine is a key piece of equipment in the field of metal pipe processing. It is mainly used to process galvanized steel strip into various types of steel pipes through continuous forming, welding and other processes. It is widely used in industries such as construction, chemical industry and furniture. Its production process is efficient and continuous, and it has both cost advantages and corrosion resistance, making it one of the mainstream choices for welded pipe production.

[0003] Galvanized pipes are made through processes such as uncoiling, leveling, forming, and welding. However, the existing leveling method uses two leveling rollers to directly squeeze the steel strip. This method is insufficient to eliminate the bending and internal stress generated when the steel strip is coiled. Therefore, after bending the steel strip, there is still a strong outward stress, resulting in larger gaps in the steel pipe formed by bending the steel strip. This makes it difficult to shape the pipe and weld the larger gaps, thus increasing the difficulty of forming the steel pipe. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a tube-making machine for hot-dip galvanized steel strip processing, which solves the problem that when using a galvanized steel strip tube-making machine, it is inconvenient to effectively eliminate the bending and internal stress generated during the coiling of the steel strip to make it flat, and it is inconvenient to shape the bent steel strip.

[0006] (II) Technical Solution

[0007] To facilitate the effective elimination of bending and internal stress generated during the coiling of the galvanized steel strip in the above-mentioned galvanized steel strip pipe making machine, making it flat and easy to shape the bent steel strip, this utility model provides the following technical solution: A pipe making machine for hot-dip galvanized steel strip processing includes a machine base, a steel strip leveling structure is provided on the upper left side of the machine base, a forming structure is provided on the right side of the steel strip leveling structure, a shaping box is provided on the right side of the forming structure, air-cooling boxes are provided on both sides of the shaping box, a gap shaping structure is also provided inside the shaping box, a welding box is provided on the right side of the shaping box, and a galvanized steel pipe is inserted through the steel strip leveling structure, forming structure and gap shaping structure;

[0008] The steel strip leveling structure includes a crossbar and a frame. The frame is set between two crossbars. The crossbar and the frame are fixed to the machine base by bolts. A limit wheel rotates on the crossbar through a pivot pin. Two leveling rollers are set on one side of the frame, an upper convex roller and a lower concave roller are set on one side of the frame, and an upper concave roller and a lower convex roller are set on one side of the frame.

[0009] The slit shaping structure includes shaping guide rollers, which are rotatably connected to the inside of the shaping box via pivot pins. Two rotating shafts rotatably rotate on the bottom surface of the shaping box. Gear rings are fixed to the lower surface of each shaft, and the two gear rings mesh. A motor is also installed below the shaping box, and the output end of the motor is fixedly connected to one of the rotating shafts. A vertical frustum roller is fixed to the upper side of the rotating shaft, and a driving bevel tooth is fixed to the top of the vertical frustum roller. A three-head frame is fixed to the inner wall of the shaping box. A transverse frustum roller rotates on one side of the three-head frame, and a driven bevel tooth is fixed on the transverse frustum roller, meshing with the driving bevel tooth. A T-shaped frame rotates between the two transverse frustum rollers, and the other end of the T-shaped frame is rotatably connected to the shaping box. High-temperature resistant rubber strips are provided on the surfaces of both the vertical and transverse frustum rollers.

[0010] Preferably, a lead screw is threaded onto the frame, and a slider is rotatably connected to the bottom of the lead screw via a bearing. The slider is slidably connected to the frame, and the upper leveling roller, upper convex roller, and upper concave roller are rotatably connected to the slider.

[0011] Preferably, the lower leveling roller, concave roller, and convex roller are fixedly connected to the frame.

[0012] Preferably, the upper and lower leveling rollers are respectively misaligned with the upper convex roller and the lower concave roller, as well as the upper concave roller and the lower convex roller.

[0013] Preferably, the high-temperature resistant rubber strip on the surface of the vertical frustum roller is in the shape of a frustum, and the high-temperature resistant rubber strip on the surface of the horizontal frustum roller is in the shape of a frustum.

[0014] Preferably, the two vertical frustum rollers are arranged symmetrically, and the two horizontal frustum rollers are arranged symmetrically.

[0015] Preferably, the forming structure includes a plurality of sorted upper and lower rollers.

[0016] Preferably, the welding box is equipped with a high-frequency induction welding machine.

[0017] Compared with the prior art, this utility model provides a tube-making machine for processing hot-dip galvanized steel strip, which has the following advantages:

[0018] 1. The tube-making machine for hot-dip galvanized steel strip processing can first flatten the steel strip by passing through the first set of upper and lower leveling rollers. The steel strip can then be pressed downward into a concave shape by passing through the upper convex roller and the lower concave roller. The steel strip is then flattened again by passing through the second set of upper and lower leveling rollers. After being flattened, the steel strip is pressed upward into a convex shape by passing through the upper concave roller and the lower convex roller. The steel strip is then flattened again by the third set of upper and lower leveling rollers. Therefore, the steel strip can be repeatedly shaped and plastically deformed into a flat state, eliminating the bending and internal stress generated when the steel strip is rolled, making it flat.

[0019] 2. The tube-making machine for hot-dip galvanized steel strip processing uses a high-temperature resistant rubber strip on a vertical frustum roller to contact both sides of the galvanized steel pipe, simultaneously exerting an upward pushing force on both sides of the galvanized steel pipe. When the high-temperature resistant rubber strip on the horizontal frustum roller contacts the upper part of the galvanized steel pipe, it simultaneously exerts a horizontal inward pushing force on the upper part of the galvanized steel pipe, allowing both sides of the galvanized steel pipe to approach and contact each other, thereby reducing the gaps in the galvanized steel pipe and enabling rapid shaping of the air-cooled galvanized steel pipe. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the steel strip leveling structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the structural gap shaping structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the combination of the vertical frustum roller and the horizontal frustum roller in the structure of this utility model.

[0024] The components include: 1. Machine base; 2. Steel strip leveling structure; 21. Crossbar; 22. Frame; 23. Limiting wheel; 24. Leveling roller; 25. Upper convex roller; 26. Lower concave roller; 27. Upper concave roller; 28. Lower convex roller; 3. Forming structure; 4. Shaping box; 5. Air-cooling box; 6. Gap shaping structure; 61. Shaping guide roller; 62. Rotating shaft; 63. Toothed ring; 64. Vertical frustum roller; 65. Drive bevel gear; 66. Three-head frame; 67. Horizontal frustum roller; 68. Driven bevel gear; 69. T-shaped frame; 610. High-temperature resistant rubber strip; 7. Welding box; 8. Galvanized steel pipe. Detailed Implementation

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0026] Please see Figure 1-4 This utility model provides a pipe-making machine for hot-dip galvanized steel strip processing, including a base 1, a steel strip leveling structure 2 is provided on the upper left side of the base 1, a forming structure 3 is provided on the right side of the steel strip leveling structure 2, a shaping box 4 is provided on the right side of the forming structure 3, air-cooling boxes 5 are provided on both sides of the shaping box 4, a gap shaping structure 6 is also provided inside the shaping box 4, and a welding box 7 is provided on the right side of the shaping box 4. A galvanized steel pipe 8 passes through the steel strip leveling structure 2, the forming structure 3 and the gap shaping structure 6.

[0027] The steel strip leveling structure 2 includes a crossbar 21 and a frame 22. The frame 22 is set between two crossbars 21. The crossbars 21 and the frame 22 are fixed to the machine base 1 by bolts. The crossbars 21 have a limit wheel 23 that rotates through a pivot pin. One side of the frame 22 is provided with two leveling rollers 24, an upper convex roller 25 and a lower concave roller 26, and an upper concave roller 27 and a lower convex roller 28.

[0028] The gap shaping structure 6 includes a shaping guide roller 61, which is rotatably connected to the inside of the shaping box 4 via a pivot pin. Two rotating shafts 62 rotatably rotate on the bottom surface of the shaping box 4. Gear rings 63 are fixed to the lower surface of each shaft 62, and the two gear rings 63 mesh. A motor is also installed below the shaping box 4, and the output end of the motor is fixedly connected to one of the rotating shafts 62. A vertical frustum roller 64 is fixed to the upper side of the rotating shaft 62, and a driving bevel gear 65 is fixed to the top of the vertical frustum roller 64. A three-head frame 66 is fixed to the inner wall of the shaping box 4. A transverse frustum roller 67 rotatably rotates on one side of the three-head frame 66. A driven bevel gear 68 is fixed on the transverse frustum roller 67, and the driven bevel gear 68 meshes with the driving bevel gear 65. A T-shaped frame 69 rotatably rotates between the two transverse frustum rollers 67. The other end of 69 is rotatably connected to the shaping box 4. High-temperature resistant rubber strips 610 are provided on the surfaces of the vertical frustum roller 64 and the horizontal frustum roller 67. The galvanized steel pipe 8 is initially in the shape of a steel strip. The steel strip is passed from left to right through the steel strip leveling structure 2, the forming structure 3, and the gap shaping structure 6 in the shaping box 4. Therefore, the steel strip can be leveled by the upper and lower leveling rollers 24 on the steel strip leveling structure 2, the upper convex roller 25 and the lower concave roller 26, and the upper concave roller 27 and the lower convex roller 28 respectively. The galvanized steel pipe 8 can be formed into a tubular shape by the forming structure 3. The galvanized steel pipe 8 can be shaped by the vertical frustum roller 64 and the horizontal frustum roller 67 on the gap shaping structure 6. Finally, the galvanized steel pipe 8 can be welded into shape by the high-frequency induction welding machine inside the welding box 7.

[0029] Furthermore, a lead screw is threaded onto the frame 22, and a slider rotates at the bottom of the lead screw via a bearing. The slider is slidably connected to the frame 22. The upper leveling roller 24, upper convex roller 25, and upper concave roller 27 are rotatably connected to the slider, which allows the height of the upper leveling roller 24, upper convex roller 25, and upper concave roller 27 to be adjusted separately via the lead screw.

[0030] Furthermore, the lower leveling roller 24, concave roller 26, and convex roller 28 are fixedly connected to the frame 22, so that the leveling roller 24, concave roller 26, and convex roller 28 in the passage section can support the steel strip from the bottom.

[0031] Furthermore, the upper and lower leveling rollers 24 are respectively staggered with the upper convex roller 25 and the lower concave roller 26, as well as the upper concave roller 27 and the lower convex roller 28, so that the steel strip can be repeatedly shaped after passing through the processes of being flattened, concave, flattened, convex, and flattened by the upper and lower leveling rollers 24 with the upper convex roller 25 and the lower concave roller 26, as well as the upper concave roller 27 and the lower convex roller 28.

[0032] Furthermore, the high-temperature resistant rubber strip 610 on the surface of the vertical frustum roller 64 is in the shape of a frustum, and the high-temperature resistant rubber strip 610 on the surface of the horizontal frustum roller 67 is in the shape of a frustum. Through the friction between the high-temperature resistant rubber strip 610 and the galvanized steel pipe 8, the high-temperature resistant rubber strip 610 can exert a certain pushing force on the surface of the galvanized steel pipe 8, so that the galvanized steel pipe 8 can be tensioned. Moreover, the high-temperature resistant rubber strip 610 is made of EPDM rubber, which has the characteristics of high temperature resistance, low hardness, and high friction, thus preventing the galvanized steel pipe 8 from softening the high-temperature resistant rubber strip 610.

[0033] Furthermore, two vertical frustum rollers 64 are symmetrically arranged, and two horizontal frustum rollers 67 are symmetrically arranged. Air-cooling boxes 5 are set at the inlet and outlet ends on both sides of the shaping box 4. The air-cooling box 5 is equipped with an air cooler, which can dry the moisture on the galvanized steel pipe 8, increase the friction between the galvanized steel pipe 8 and the high-temperature resistant rubber strip 610, and also cool the galvanized steel pipe 8. This allows the two vertical frustum rollers 64 to exert a vertical and upward thrust on the galvanized steel pipe 8, and the two horizontal frustum rollers 67 to exert a horizontal and inward thrust on the galvanized steel pipe 8. Therefore, the cooled galvanized steel pipe 8 can be quickly shaped. The shaped galvanized steel pipe 8 can be air-cooled and shaped again by the air-cooling box 5 at the outlet end.

[0034] Furthermore, forming structure 3 includes multiple sequentially arranged upper and lower rollers. The steel strip passes through multiple forming stands in sequence, each stand having a pair of precisely calculated upper and lower rollers. In the initial stage, the rollers gradually bend the two edges of the steel strip upwards to form a certain angle. In the intermediate stage, the angle gradually increases, and the cross-section of the steel strip evolves from a "C" shape to a "U" shape. In the final stage, the "U" shape further closes, forming a circular tube with gaps. In this process, the design of the roller profile is crucial, ensuring smooth and uniform deformation of the material and avoiding scratches on the galvanized layer or wrinkles.

[0035] Furthermore, the welding box 7 is equipped with a high-frequency induction welding machine. The high-frequency generator on the high-frequency induction welding machine generates a high-frequency current, which is applied to the butt joint of the galvanized steel pipe 8 through the copper element of the induction coil, thereby enabling the galvanized steel pipe 8 to be welded.

[0036] The working principle of this utility model is as follows: In use, the steel strip moves from left to right by passing sequentially through the steel strip leveling structure 2 and the forming structure 3. When the steel strip passes the first set of upper and lower leveling rollers 24, it is first flattened. When the steel strip passes the upper convex roller 25 and the lower concave roller 26, it is pressed downwards into a concave shape. Then, the steel strip passes the second set of upper and lower leveling rollers 24 and is flattened again. After being flattened, the steel strip passes the upper concave roller 27 and the lower convex roller 28, which presses it upwards into a convex shape. Finally, the steel strip is flattened again by the third set of upper and lower leveling rollers 24. After the processes of flattening, concave, flattening, convex, and flattening, the steel strip can... The steel strip is repeatedly shaped to plastically deform it into a flat state, eliminating the bending and internal stress generated during coiling. After flattening, the steel strip passes through the precisely calculated upper and lower rollers arranged on the forming structure 3, where it is extruded and formed, thus initially producing a galvanized steel pipe 8 with gaps. During the forming process, the galvanized steel pipe 8 is water-cooled by a coolant provided on the forming structure 3 to lower its temperature. When the initially formed galvanized steel pipe 8 enters the shaping box 4, an air-cooling box 5 is also provided at the port of the shaping box 4. The air-cooling box 5 serves two purposes: firstly, to further cool the galvanized steel pipe 8, and secondly, to further cool the galvanized steel pipe 8. After the surface moisture is blown away, when the galvanized steel pipe 8 moves between the two vertical frustum rollers 64 and the two horizontal frustum rollers 67, the motor located below the shaping box 4 drives one of the rotating shafts 62 to rotate. The rotating shaft 62, through the meshing of two gear rings 63, drives the other rotating shaft 62 to rotate. The vertical frustum rollers 64, through the meshing of the driving bevel teeth 65 and the driven bevel teeth 68, drive the horizontal frustum rollers 67 to rotate. This allows the vertical frustum rollers 64 and the horizontal frustum rollers 67 to respectively drive the high-temperature resistant rubber strips 610 on their surfaces to rotate. When the high-temperature resistant rubber strips 610 on the vertical frustum rollers 64 contact the two sides of the galvanized steel pipe 8, the high-temperature resistant rubber strips 610 rotate. The friction between the high-temperature rubber strip 610 and the surface of the galvanized steel pipe 8 can simultaneously exert an upward pushing force on both sides of the galvanized steel pipe 8. When the high-temperature resistant rubber strip 610 on the transverse frustum roller 67 contacts the upper part of the galvanized steel pipe 8, it can simultaneously exert a horizontal inward pushing force on the upper part of the galvanized steel pipe 8, so that the two sides of the galvanized steel pipe 8 can approach and contact each other, thereby reducing the gap of the galvanized steel pipe 8, thus enabling the air-cooled galvanized steel pipe 8 to be quickly shaped. After being joined, the galvanized steel pipe 8 passes through the shaping guide roller 61 to be engaged, and then the engaged galvanized steel pipe 8 enters the welding box 7, where it is welded and formed by a high-frequency induction welding machine set inside the welding box 7.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tube-making machine for processing hot-dip galvanized steel strip, comprising a machine base (1), characterized in that: A steel strip leveling structure (2) is provided on the upper left side of the base (1), a forming structure (3) is provided on the right side of the steel strip leveling structure (2), a shaping box (4) is provided on the right side of the forming structure (3), a cooling box (5) is provided on both sides of the shaping box (4), a slot shaping structure (6) is also provided inside the shaping box (4), a welding box (7) is provided on the right side of the shaping box (4), and galvanized steel pipes (8) pass through the steel strip leveling structure (2), the forming structure (3) and the slot shaping structure (6). The steel strip leveling structure (2) includes a crossbar (21) and a frame (22). The frame (22) is set between two crossbars (21). The crossbars (21) and the frame (22) are fixed to the machine base (1) by bolts. The crossbars (21) have a limit wheel (23) that rotates by a pivot pin. Two leveling rollers (24) are set on one side of the frame (22). An upper convex roller (25) and a lower concave roller (26) are set on one side of the frame (22). An upper concave roller (27) and a lower convex roller (28) are set on one side of the frame (22). The slit shaping structure (6) includes a shaping guide roller (61), which is rotatably connected to the inside of the shaping box (4) via a pivot pin. The bottom surface of the shaping box (4) has two rotating shafts (62). A toothed ring (63) is fixed on the lower side of the surface of the rotating shaft (62), and the two toothed rings (63) mesh. A motor is also provided below the shaping box (4), and the output end of the motor is fixedly connected to one of the rotating shafts (62). A vertical frustum roller (64) is fixed on the upper side of the rotating shaft (62), and a drive is fixed at the top of the vertical frustum roller (64). The moving bevel tooth (65) is fixed to the inner wall of the shaping box (4). A three-head frame (66) is fixed to one side of the three-head frame (66). A transverse frustum roller (67) rotates on one side of the transverse frustum roller (67). A driven bevel tooth (68) is fixed on the transverse frustum roller (67). The driven bevel tooth (68) meshes with the driving bevel tooth (65). A T-shaped frame (69) rotates between the two transverse frustum rollers (67). The other end of the T-shaped frame (69) is rotatably connected to the shaping box (4). High-temperature resistant rubber strips (610) are provided on the surfaces of the vertical frustum roller (64) and the transverse frustum roller (67).

2. The tube-making machine for hot-dip galvanized steel strip processing according to claim 1, characterized in that: The frame (22) is threaded with a lead screw, and the bottom of the lead screw is connected to a slider via a bearing. The slider is slidably connected to the frame (22). The upper leveling roller (24), upper convex roller (25) and upper concave roller (27) are respectively rotatably connected to the slider.

3. The pipe-making machine for hot-dip galvanized steel strip processing according to claim 1, characterized in that: The lower leveling roller (24), the concave roller (26), and the convex roller (28) are fixedly connected to the frame (22).

4. The tube-making machine for hot-dip galvanized steel strip processing according to claim 1, characterized in that: The upper and lower leveling rollers (24) are respectively offset from the upper convex roller (25) and the lower concave roller (26), as well as the upper concave roller (27) and the lower convex roller (28).

5. A tube-making machine for processing hot-dip galvanized steel strip according to claim 1, characterized in that: The high-temperature resistant rubber strip (610) on the surface of the vertical frustum roller (64) is in the shape of a frustum, and the high-temperature resistant rubber strip (610) on the surface of the horizontal frustum roller (67) is in the shape of a frustum.

6. A tube-making machine for processing hot-dip galvanized steel strip according to claim 1, characterized in that: The two vertical frustum rollers (64) are symmetrically arranged, and the two horizontal frustum rollers (67) are symmetrically arranged.

7. A tube-making machine for processing hot-dip galvanized steel strip according to claim 1, characterized in that: The forming structure (3) includes multiple sorted upper and lower rollers.

8. A tube-making machine for processing hot-dip galvanized steel strip according to claim 1, characterized in that: The welding box (7) is equipped with a high-frequency induction welding machine.

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