Pipeline winding internal mold guided by rollers

Abstract

The pipeline winding inner mold guided by the roller comprises a fixed mold and a rotary mold which are coaxially arranged, and the rotary mold can rotate relative to the fixed mold. The utility model has the positive effects that the device comprises the fixed die and the rotary die which are coaxially arranged, the fixed die can provide support and guide for coiled materials, and the rotary die can provide support for pipe forming, drive a pipe to be spirally wound and drive the pipe to be longitudinally conveyed; first square steel which is circumferentially arranged is installed between a first fixed disc and a second fixed disc at the two ends of the fixed die and can be adjusted in the radial direction of the fixed discs, and second square steel which is circumferentially arranged is installed between a first movable disc and a second movable disc at the two ends of the rotating die and can be adjusted in the radial direction of the movable discs. The radial position of the square steel can be adjusted according to pipelines of different diameter types, multiple composite pipelines of different diameter types can be produced on one production line, other production lines of inner molds of different diameter types do not need to be additionally arranged, and the production cost is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of composite pipe manufacturing equipment, in particular to a pipe winding inner mold guided by rollers. Background Art

[0002] At present, for the production of large-diameter pipes, a coil is spirally wound on an inner mold and welded at the joints to form a closed pipe body, and then sheet materials are welded from the outer periphery to obtain a composite pipe with a set thickness. One type of existing inner mold is a steel cylinder with a fixed diameter, and each cylinder can only produce pipes of one diameter. For example, for corrugated pipes, if continuous production is carried out, the pipe mold is likely to be unable to drive or become locked. Another type is a rotating knurled oval roller arranged between two support circular plate molds to support and drive the sheet material to wind and form a pipe. Neither of the above two molds can adjust the diameter of the pipe steplessly, nor can they keep sufficient and stable elastic pressure contact and frictional force between the composite pipe and the mold. At the same time, the steel cylinder and the knurled steel roller make the inner surface of the pipe very rough, and neither of these two molds can produce composite pipes with wide-width sheet materials, resulting in a significant reduction in production efficiency. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a pipe winding inner mold guided by rollers, which uses steel rollers for guiding, sizing and polyurethane rollers for driving and output, and is a brand-new composite pipe inner mold with steplessly adjustable pipe diameter, thoroughly solving many drawbacks existing in the inner mold of spiral wound composite pipes. Moreover, the pipe is flat, smooth, the joints are greatly reduced, it can use wide-width sheet materials for production, the production is very stable, the adjustment is very convenient, it can produce super-large diameter and very long pipes, and solves the problems in the prior art.

[0004] The technical solution adopted by the present utility model to solve its technical problems is as follows: a pipe winding internal mold guided by rollers, which includes a fixed mold and a rotating mold arranged coaxially. The rotating mold can rotate relative to the fixed mold. The fixed mold includes a first fixed plate and a second fixed plate vertically arranged at both ends. A number of first square steel bars arranged circumferentially are installed between the first fixed plate and the second fixed plate. Each first square steel bar can be adjusted and moved radially on the first fixed plate and the second fixed plate. A number of first rollers are installed in the length direction of the first square steel bar. The first rollers can adjust their own angular positions on the first square steel bar. The inclination angles of all the first rollers on the fixed mold are consistent with the direction of the spiral formed by the sheet winding. The rotating mold includes a first moving plate and a second moving plate vertically arranged at both ends. A number of second square steel bars arranged circumferentially are installed between the first moving plate and the second moving plate. Each second square steel bar can be adjusted and moved radially on the first moving plate and the second moving plate. A number of second rollers are installed in the length direction of the second square steel bar. The second rollers can adjust their own angular positions on the second square steel bar. All the second rollers on the rotating mold are arranged perpendicular to the first rollers. Among them, the fixed mold provides support and guidance for the coil material, and the rotating mold provides support for the pipe forming, drives the pipe to be helically wound, and drives the longitudinal conveying of the pipe. The fixed mold is located at the front end of the rotating mold. A machine frame is provided on the front side of the fixed mold. A driving motor is installed on the machine frame. A long shaft is installed on the output shaft of the driving motor. The first fixed plate is arranged on the machine frame. The long shaft passes through the centers of the first fixed plate and the second fixed plate and is fixedly connected to the centers of the first moving plate and the second moving plate. When the driving motor starts, it can drive the rotating mold to rotate relative to the fixed mold. Corresponding to the position of the rotating mold, a synchronously rotating collar is installed on the long shaft. A corresponding first spring is installed between the collar and each second square steel bar. The first spring can make the second square steel bar elastically float radially on the first moving plate and the second moving plate. A number of first diameter adjustment grooves arranged circumferentially are provided on the first fixed plate. The second fixed plate, the first moving plate, and the second moving plate are all composed of a number of concentrically arranged circular ring plates. The adjacent circular ring plates are fixedly connected by detachable connecting plates. A number of second diameter adjustment grooves arranged circumferentially are provided on each circular ring plate. First locking bolts are installed at both ends of the first square steel bar in the length direction. One end of the first locking bolt is fitted and installed in the first diameter adjustment groove, and the other end of the first locking bolt is fitted and installed in the second diameter adjustment groove. Second locking bolts are installed at both ends of the second square steel bar in the length direction. The second locking bolts are fitted and installed in the second diameter adjustment grooves on the first moving plate and the second moving plate. Adjusting nuts are installed in the second diameter adjustment grooves. Adjusting bolts are fitted and installed in the adjusting nuts. A second spring is installed between the second square steel bar and the second diameter adjustment groove. The second spring always has a tendency to make the end of the adjusting bolt contact the second square steel bar. Rotating the adjusting bolt can adjust the position of the second square steel bar in the second diameter adjustment groove.The first roller and the second roller are respectively mounted on the first square steel and the second square steel through a wheel frame. A rotating shaft is provided at the bottom of the wheel frame, and an arc-shaped groove is formed in the wheel frame. A third locking bolt is fitted in the arc-shaped groove, and screw holes matching the third locking bolt are formed in the first square steel and the second square steel. Rotating the third locking bolt can position the wheel frame on the first square steel and the second square steel. The first roller is a steel wheel, and the second roller is a polyurethane wheel.

[0005] The positive effect of the present utility model lies in that: A pipe winding internal mold using roller guidance described in the present utility model includes a fixed mold and a rotating mold arranged coaxially. The fixed mold can provide support and guidance for the coil material, and the rotating mold can provide support for pipe forming, drive the pipe to be helically wound, and drive the pipe to be longitudinally conveyed. A circumferentially arranged first square steel is installed between the first fixed plate and the second fixed plate at both ends of the fixed mold, and the first square steel can be adjusted in the radial direction of the fixed plate. A circumferentially arranged second square steel is installed between the first moving plate and the second moving plate at both ends of the rotating mold, and the second square steel can be adjusted in the radial direction of the moving plate. The position of the square steel in the radial direction can be adjusted according to pipes of different diameter types, and a production line can produce composite pipes of multiple different diameter types without additionally setting up production lines for other internal molds of different diameter types, effectively reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 is the three-dimensional structure schematic diagram of the present utility model;

[0007] Figure 2 is the front view of the present utility model;

[0008] Figure 3 is Figure 2 the left view of;

[0009] Figure 4 is Figure 2 the right view of;

[0010] Figure 5 is Figure 2 the enlarged view of the A-A sectional view in;

[0011] Figure 6 is Figure 4 the partial enlarged view of I in;

[0012] Figure 7 is the structure schematic diagram of the roller mounted on the square steel through the wheel frame. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] A pipe winding internal mold using roller guidance described in the present utility model, as Figures 1-4As shown in the figure, it includes a fixed mold and a rotating mold arranged coaxially. The rotating mold can rotate relative to the fixed mold. The fixed mold provides support and guidance for the coil material, and the rotating mold provides support for pipe forming, drives the pipe to be helically wound, and drives the longitudinal conveyance of the pipe.

[0014] The fixed mold includes a first fixed disk 1 and a second fixed disk 2 vertically arranged at both ends. The above-mentioned fixed disks are relatively fixedly arranged. A number of first square steel bars 3 arranged in a circle are installed between the first fixed disk 1 and the second fixed disk 2. Each first square steel bar 3 can be adjusted and moved radially on the first fixed disk 1 and the second fixed disk 2, so that composite pipes of different diameter types can be produced.

[0015] To achieve the support for the peripheral coil material, a number of first rollers 4 are installed in the length direction of the first square steel bar 3. The first rollers 4 can adjust their own angular positions on the first square steel bar 3. The inclination angles of all the first rollers 4 on the fixed mold are consistent with the direction of the helix formed by the sheet winding. The inclination angle positions of the first rollers 4 on the first square steel bar 3 can be adjusted according to the winding helix angles of different types of pipes.

[0016] The rotating mold includes a first moving disk 5 and a second moving disk 6 vertically arranged at both ends. The above-mentioned moving disks can rotate relative to the fixed disks. A number of second square steel bars 7 arranged in a circle are installed between the first moving disk 5 and the second moving disk 6. Each second square steel bar 7 can be adjusted and moved radially on the first moving disk 5 and the second moving disk 6 to adapt to the processing and production of composite pipes of different diameter types.

[0017] To achieve the support and conveyance of the formed pipe, a number of second rollers 8 are installed in the length direction of the second square steel bar 7. The second rollers 8 can adjust their own angular positions on the second square steel bar 7. All the second rollers 8 on the rotating mold are arranged perpendicular to the first rollers 4. According to the needs of producing different types of pipes, the position of the second rollers 8 can be adjusted according to the relative positions of the first rollers 4 on the fixed mold, so as to achieve the support and conveyance of the processed pipe.

[0018] To achieve the rotational drive of the rotating mold, the fixed mold is located at the front end of the rotating mold. A machine frame 9 is provided on the front side of the fixed mold. A driving motor 10 is installed on the machine frame 9. A long shaft 11 is installed on the output shaft of the driving motor 10. The first fixed disk 1 is arranged on the machine frame 9, and the second fixed disk 2 and the first fixed disk 1 are fixedly connected to each other. The long shaft 11 passes through the centers of the first fixed disk 1 and the second fixed disk 2 and is fixedly connected to the centers of the first moving disk 5 and the second moving disk 6. When the driving motor 10 is started, it can drive the rotating mold to rotate relative to the fixed mold. The layout of the above structure not only satisfies the coaxial arrangement of the fixed mold and the rotating mold, but also can drive the rotating mold to rotate relative to the fixed mold, providing the required power for the spiral forming of the pipe.

[0019] During the processing and manufacturing of the composite pipe, its inner peripheral wall is not a smooth circular surface, and there will be protrusions or depressions. In order to adapt to the above situation and provide a more comprehensive support for the inner peripheral surface of the processed composite pipe, corresponding to the position of the rotating die, a synchronously rotating collar 20 is installed on the long shaft 11. Several collars 20 can be installed on the long shaft 11 within the rotating die. A corresponding first spring 21 is installed between each collar 20 and each second square steel 7. The first spring 21 enables the second square steel 7 to elastically float radially along the first moving plate 5 and the second moving plate 6, so as to cope with the protrusions or depressions on the inner periphery of the composite pipe, thereby providing an elastic floating support for the processed pipe adaptively.

[0020] Further, in order to realize the radial position adjustment of the first square steel 3 on the first fixed plate 1 and the second fixed plate 2, and the radial position adjustment of the second square steel 7 on the first moving plate 5 and the second moving plate 6, a number of first diameter adjustment grooves 12 arranged in a circle are formed on the first fixed plate 1. The second fixed plate 2, the first moving plate 5 and the second moving plate 6 are all composed of a number of concentrically arranged circular plates 13. As Figure 5 shown, adjacent circular plates 13 are fixedly connected by detachable connecting plates 14. By disassembling and assembling the connecting plates 14, the superposition installation or mutual disassembly of several circular plates 13 can be realized, and then the outer diameter size of the die can be adjusted to adapt to the production of composite pipes of different diameter types.

[0021] A number of second diameter adjustment grooves 15 arranged in a circle are formed on each circular plate 13. First locking bolts 16 are installed at both ends of the first square steel 3 in the length direction. One end of the first locking bolt 16 is fitted and installed in the first diameter adjustment groove 12, and the other end of the first locking bolt 16 is fitted and installed in the second diameter adjustment groove 15. Second locking bolts 17 are installed at both ends of the second square steel 7 in the length direction. The second locking bolts 17 are fitted and installed in the second diameter adjustment grooves 15 on the first moving plate 5 and the second moving plate 6.

[0022] After loosening the first locking bolt 16, the radial position of the first square steel 3 in the fixed die can be adjusted. Tightening the first locking bolt 16 can position the first square steel 3 between the two fixed plates. After loosening the second locking bolt 17, the radial position of the second square steel 7 in the rotating die can be adjusted. Tightening the second locking bolt 17 can position the second square steel 7 between the two moving plates.

[0023] During the processing of the composite pipe, the coil will be spirally wound around the fixed die and the rotating die, and is located on the outer periphery of the second fixed plate 2, the first fixed plate 1 and the second fixed plate 2. During the forming and conveying process, it will also pass through the second fixed plate 2, the first fixed plate 1 and the second fixed plate 2, and will not come into contact with or interfere with the first fixed plate 1. Therefore, the first fixed plate 1 does not need to be assembled in the form of multiple circular ring plates 13 and can be directly fixedly arranged on the frame 9. When the first square steel 3 is adjusted radially, there is no need to consider the interference effect of the diameter of the first fixed plate 1 on the processed pipe. The second fixed plate 2, the first fixed plate 1 and the second fixed plate 2 are assembled by several circular ring plates 13. When adaptively adjusting the radial position of the square steel, for example, when processing a composite pipe with a smaller diameter, the circular ring plates 13 on the outer periphery are removed, and the outer diameters of the fixed plate and the moving plate will also be relatively reduced. While the rollers on the outer periphery of the square steel support the inner periphery of the composite pipe, the diameters of the adjusted fixed plate and moving plate will not interfere with the processing and transportation of the small-diameter composite pipe.

[0024] Furthermore, in order to finely adjust the square steel in the rotating die and the fixed die radially by a small distance without loosening the first locking bolt 16 and the second locking bolt 17, so as to perform real-time adaptive adjustment according to the actual production situation of the composite pipe and ensure the necessary internal support for the processed composite pipe, as Figure 6 shown, adjusting nuts 18 are installed in the second diameter adjustment grooves 15, adjustment bolts 19 are installed in the adjusting nuts 18 in a matching manner, and a second spring 25 is installed between the second square steel 7 and the second diameter adjustment grooves 15.

[0025] The second spring 25 always has a tendency to make the end of the adjustment bolt 19 contact the second square steel 7. Rotating the adjustment bolt 19 can adjust the position of the second square steel 7 in the second diameter adjustment groove 15. Under the elastic force of the second spring 25, the second square steel 7 is always in contact with the adjustment bolt 19 and forms a limit. When rotating the adjustment bolt 19, the elastic force of the second spring 25 can be overcome to push the second square steel 7 to move in the second diameter adjustment groove 15, thereby realizing the fine adjustment operation of the radial position of the second square steel 7. The setting of the second spring 25 is similar to the function of the first spring 21, which can make the second square steel 7 play a corresponding elastic floating role and realize the elastic support for the processed pipe.

[0026] Furthermore, in order to realize the rotation adjustment of the first roller 4 on the first square steel 3 and the second roller 8 on the second square steel 7, as Figure 7As shown, both the first roller 4 and the second roller 8 are respectively mounted on the first square steel 3 and the second square steel 7 through the wheel brackets 22. A rotating shaft is provided at the bottom of the wheel bracket 22, enabling it to rotate relative to the square steel. To achieve the rotational positioning of the rollers, an arc-shaped groove 23 is formed on the wheel bracket 22. A third locking bolt 24 is fitted in the arc-shaped groove 23. Threaded holes mating with the third locking bolt 24 are formed on the first square steel 3 and the second square steel 7. By rotating the third locking bolt 24, the wheel bracket 22 can be positioned on the first square steel 3 and the second square steel 7. After loosening the third locking bolt 24, the inclination angle positions of the first roller 4 and the second roller 8 can be adaptively adjusted according to the processing requirements of the pipeline, and it is ensured that the first roller 4 and the second roller 8 are in a mutually perpendicular state.

[0027] Furthermore, the first roller 4 is a steel wheel and the second roller 8 is a polyurethane wheel. The second roller 8 rotates together with the rotating die, and relies on the friction with the inner circumference of the pipeline to provide the necessary power for the transportation of the processed pipeline. The material of the polyurethane wheel can provide the necessary frictional force. The steel wheel has relatively high hardness and strength, and can provide the necessary support and guidance for the initial forming of the pipeline.

[0028] The purpose of setting the relevant structures of the above elastic floating support is to adapt to the unevenness of the inner circumference of the pipe material, enable the rollers to contact the inner circumference of the pipe material, drive the pipe material to rotate and form it. The structure of setting multiple groups of rollers on the square steel allows for the repair welding of relatively wide sheets during the production process.

[0029] The internal mold of the present utility model uses a row of rollers mounted on square steel instead of a steel cylinder. The rolling direction or the helix angle of each roller can be adjusted arbitrarily. The internal mold consists of a fixed mold and a rotating mold. Each part is composed of two circular plates and a square steel with a row of rollers installed. The fixed mold at the front position can use steel wheels, which are directly fixed on the square steel. The rolling angle of the steel wheels is consistent with the helix angle of the sheet winding. The rollers of this mold play a role in composite support and guidance of the sheet. The core technology of this pipe winding internal mold is that the helix angle of the mold composite is particularly large, and wide-width sheet pipes can be produced. The polyurethane wheel has large frictional force but does not damage the inner surface of the pipeline. The rollers are in elastic contact with the pipeline, and the diameter can be adjusted steplessly.

[0030] The rotating mold at the rear position can use polyurethane wheels. The rollers can be fixed on a thin spring steel plate first. The thin steel plate is then fixed on the square steel, allowing the rollers to have elastic space in the radial direction of the pipeline and always keep pressure contact with the pipeline. The rolling direction of the rollers is perpendicular to the helix of the sheet. The rollers of this mold play a role in driving the rotation and composite support of the pipe material.

[0031] The front fixing die can be fixed on the rear seat of the production line machine body. The rear rotating die is fixed on the main drive shaft at the center of the die next to the front die. The drive shaft drives the rear rotating die to rotate, and the rotating die drives the composite pipe to rotate spirally. Each set of circular plates can be symmetrically cut into several nested ring plates with diameters ranging from small to large. Several radial long holes are cut on the ring plates to fix the roller square steel. One ring plate can complete the stepless transformation of different pressure pipe diameters of pipes at one level.

[0032] The technical solution of the present utility model is not limited within the scope of the embodiments described in the present utility model. The technical content not elaborately described in the present utility model is all well-known technology.

Claims

1. A pipe winding inner mold using roller guidance, characterized in that: It includes a fixed die and a rotating die arranged coaxially. The rotating die can rotate relative to the fixed die. The fixed die includes a first fixed plate (1) and a second fixed plate (2) vertically arranged at both ends. A number of first square steel bars (3) arranged in a circle are installed between the first fixed plate (1) and the second fixed plate (2). Each first square steel bar (3) can be adjusted and moved radially on the first fixed plate (1) and the second fixed plate (2). A number of first rollers (4) are installed in the length direction of the first square steel bar (3). The first rollers (4) can adjust their own angular positions on the first square steel bar (3). The inclination angles of all the first rollers (4) on the fixed die are consistent with the direction of the spiral formed by the sheet winding. The rotating die includes a first moving plate (5) and a second moving plate (6) vertically arranged at both ends. A number of second square steel bars (7) arranged in a circle are installed between the first moving plate (5) and the second moving plate (6). Each second square steel bar (7) can be adjusted and moved radially on the first moving plate (5) and the second moving plate (6). A number of second rollers (8) are installed in the length direction of the second square steel bar (7). The second rollers (8) can adjust their own angular positions on the second square steel bar (7). All the second rollers (8) on the rotating die are arranged perpendicular to the first rollers (4). Among them, the fixed die provides support and guidance for the coil, and the rotating die provides support for the pipe forming, drives the pipe to be helically wound, and drives the pipe to be longitudinally conveyed.

2. The internal mold for pipe winding using roller guidance according to claim 1, characterized in that: The fixed die is located at the front end of the rotating die. A frame (9) is provided on the front side of the fixed die. A driving motor (10) is installed on the frame (9). A long shaft (11) is installed on the output shaft of the driving motor (10). The first fixed plate (1) is arranged on the frame (9). The long shaft (11) passes through the axles of the first fixed plate (1) and the second fixed plate (2) and is fixedly connected to the axles of the first moving plate (5) and the second moving plate (6). When the driving motor (10) starts, it can drive the rotating die to rotate relative to the fixed die.

3. The inner die for pipe winding using roller guiding according to claim 2, characterized in that: Corresponding to the position of the rotating die, a synchronously rotating collar (20) is installed on the long shaft (11). A corresponding first spring (21) is installed between the collar (20) and each second square steel bar (7). The first spring (21) can make the second square steel bar (7) elastically float radially along the first moving plate (5) and the second moving plate (6).

4. A pipe winding inner mold using roller guidance according to claim 1, characterized in that: A plurality of first diameter adjustment grooves (12) arranged in a circumference are formed in the first fixed plate (1). The second fixed plate (2), the first movable plate (5) and the second movable plate (6) are all composed of a plurality of annular plates (13) arranged coaxially. The adjacent annular plates (13) are fixedly connected by detachable connecting plates (14). A plurality of second diameter adjustment grooves (15) arranged in a circumference are formed in each annular plate (13). First locking bolts (16) are installed at both ends in the length direction of the first square steel (3). One of the first locking bolts (16) is fitted and installed in the first diameter adjustment groove (12), and the other first locking bolt (16) is fitted and installed in the second diameter adjustment groove (15). Second locking bolts (17) are installed at both ends in the length direction of the second square steel (7). The second locking bolts (17) are fitted and installed in the second diameter adjustment grooves (15) on the first movable plate (5) and the second movable plate (6).

5. A pipe winding inner mold using roller guidance according to claim 4, characterized in that: Adjusting nuts (18) are installed in the second diameter adjustment grooves (15). Adjusting bolts (19) are fitted and installed in the adjusting nuts (18). A second spring (25) is installed between the second square steel (7) and the second diameter adjustment groove (15). The second spring (25) always has a tendency to make the end of the adjusting bolt (19) contact the second square steel (7). Rotating the adjusting bolt (19) can adjust the position of the second square steel (7) in the second diameter adjustment groove (15).

6. The inner die for pipe winding using roller guiding according to claim 1, wherein: The first roller (4) and the second roller (8) are respectively installed on the first square steel (3) and the second square steel (7) through wheel brackets (22). A rotating shaft is provided at the bottom of the wheel bracket (22). An arc-shaped groove (23) is formed in the wheel bracket (22). A third locking bolt (24) is fitted and installed in the arc-shaped groove (23). Threaded holes matching the third locking bolt (24) are formed in the first square steel (3) and the second square steel (7). Rotating the third locking bolt (24) can position the wheel bracket (22) on the first square steel (3) and the second square steel (7).

7. A pipe winding inner mold using roller guiding according to claim 1, characterized in that: The first roller (4) is a steel wheel, and the second roller (8) is a polyurethane wheel.

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