Forming system and production method of socket and spigot type pipeline

Abstract

The invention discloses a forming system and a production method of a socket type pipeline. The forming system comprises a feeding mechanism and a forming mechanism. The forming mechanism comprises a bottom frame which is integrally rectangular, supporting seats are arranged at the two ends of the bottom frame, each supporting seat is provided with two rolling wheel assemblies arranged side by side, each rolling wheel assembly comprises a base and rolling wheels, the rolling wheels are rotatably arranged on the bases, and the projections of the rolling wheels in the axial direction completely cover the projections of the bases; a forming mold is erected on the two supporting seats, the forming mold comprises a cylindrical mold pipe, and the outer diameter of the mold pipe is consistent with the inner diameter of a winding pipe to be formed; one end of the die pipe is provided with a socket forming section which is formed by protruding outwards in the radial direction; any supporting base is further provided with a rotation driving mechanism used for driving the forming mold to rotate. The device has the advantages of being reasonable in structural design, capable of continuously winding and forming pipe bodies and socket heads, beneficial to reducing production cost, improving production efficiency and the like.

Description

Technical Field

[0001] This invention relates to the field of pipe manufacturing technology, and in particular to a forming system and manufacturing method for socket-type pipes. Background Technology

[0002] Composite spiral wound pipe is a new type of irregularly shaped wall pipe with advantages such as light weight, strong pressure resistance, high joint quality, long service life, corrosion resistance, high ring stiffness, and convenient construction. It is widely used in urban water supply, drainage, long-distance water transmission, and farmland irrigation projects. Composite spiral wound pipe is made by spirally winding strip profiles and interlocking the adjacent sides of each subsequent coil with the previous coil to form a pipe. To increase the strength of the connection, adhesive is usually used at the interlocking points.

[0003] Typically, composite spiral wound pipes are manufactured using a continuous winding process. During this continuous forming process, the pipe body needs to continuously grow outwards along the axial direction, separating from the forming fixture. Therefore, the inner diameter of the pipe body must match the outer diameter of the forming fixture. However, in engineering construction, composite spiral wound pipes are installed in sections, and a sealed connection is required between adjacent ends. For this reason, existing composite spiral wound pipes require separately manufactured sockets with inner diameters matching the outer diameter of the composite spiral wound pipe. These sockets are then welded to one end of the composite spiral wound pipe to facilitate sealing the two pipe sections during construction. This post-welded socket requires additional socket processing equipment and can only be welded manually, impacting production efficiency and increasing production costs. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is: how to provide a forming system and production method for socket-type pipes with reasonable structural design, capable of continuous winding and forming of pipe body and socket, which is conducive to reducing production costs and improving production efficiency.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A forming system for a socket-type pipe includes a feeding mechanism for hot extrusion of a continuous strip, wherein a forming mechanism is provided at the discharge end of the feeding mechanism; the forming mechanism includes a generally rectangular base frame, with support seats extending along the width direction at both ends of the base frame, and two roller assemblies arranged side by side on the support seats, each roller assembly including a base and a roller, the roller being rotatably mounted on the base via an axis arranged along the length direction of the base frame, the axial projection of the roller completely covering the projection of the base; the support seats have guide rails and lead screws arranged along the length direction, and at least one of the bases... The base is slidably fitted onto the guide rail, and its bottom is fitted onto the lead screw via a lead screw nut, allowing the distance between the two bases to be adjusted via the lead screw; a forming mold is mounted on each of the two support seats, the forming mold comprising a cylindrical mold tube, the outer diameter of which is consistent with the inner diameter of the winding tube to be formed; one end of the mold tube has a radially outwardly protruding socket forming section, the outer diameter of which matches the outer diameter of the winding tube to be formed; both ends of the mold tube are respectively mounted on two rollers of the corresponding support seat; each support seat also has a rotary drive mechanism for driving the forming mold to rotate.

[0006] In the above structure, support seats are set at both ends of the base frame. Each support seat has two parallel roller assemblies, and the axial projection of the rollers covers the projection of the base, making the rollers protrude relative to the base. This creates an outer circular support structure with the two rollers on each support seat. A rotary drive mechanism drives the forming mold to rotate on the rollers. By simply moving the feeding mechanism relative to the forming mold along the length of the base frame, a composite spiral tube can be continuously wound on the surface of the forming mold. Because one end of the mold tube has a protruding socket forming section, when the strip profile is spirally wound using the mold tube as the forming mold, the formed spiral tube will form a socket with a larger diameter in the socket forming section. Since the outer diameter of the socket forming section matches the outer diameter of the spiral tube, that is, the inner diameter of the formed socket matches the outer diameter of the spiral tube, one end of the spiral tube can be inserted into the socket of another spiral tube for a sealed connection during construction. Because the socket is integrally wound on the mold tube, its connection strength is higher, eliminating the need for manual welding, greatly improving production efficiency and reducing production costs.

[0007] Furthermore, the mold tube includes a first arc-shaped plate, a second arc-shaped plate, and a third arc-shaped plate arranged circumferentially. The maximum chord length of the first arc-shaped plate, the second arc-shaped plate, and the third arc-shaped plate is less than the minimum inner diameter of the winding tube to be formed. The first arc-shaped plate and the second arc-shaped plate are respectively hinged to both sides of the third arc-shaped plate. A support mechanism for supporting the first arc-shaped plate, the second arc-shaped plate, and the third arc-shaped plate to form the mold tube is retractably provided inside the mold tube. The first arc-shaped plate and the second arc-shaped plate can rotate inward sequentially when the support mechanism is retracted.

[0008] In this way, since the maximum spiral length of the first, second, and third arc plates is less than the minimum inner diameter of the winding tube, after the first and second arc plates rotate inward in sequence, the maximum outer circle diameter of the mold tube is less than the minimum inner diameter of the winding tube, so that the mold tube can be removed from the formed winding tube.

[0009] Furthermore, the bottom of the base frame has a track extending along its length, and the base frame is slidably fitted onto the track by a slider; the base frame has a linear drive mechanism for driving the base frame to move along the track.

[0010] In this way, the base frame can be moved along the length direction by the linear drive mechanism, so that the feeding mechanism can be kept fixed, and the forming mold can be moved axially by the base frame to achieve continuous winding.

[0011] Furthermore, it also includes a rack arranged along the track, and the linear drive mechanism includes a geared motor mounted on the base frame, with a gear meshing with the rack on the output shaft of the geared motor.

[0012] In this way, the geared motor drives the gear to rotate, which in turn causes the gear to roll along the rack, thereby achieving overall drive of the chassis.

[0013] Furthermore, two lead screws are coaxially connected and have opposite directions of rotation; the two bases are respectively fitted onto the two lead screws via lead screw nuts.

[0014] Because the diameters at both ends of the forming mold are different, by fitting the two bases on the same support seat onto two lead screws with opposite directions of rotation, the two bases can be adjusted simultaneously while keeping their center position constant. This also ensures that the support center surfaces on the support seats at both ends remain unchanged. For forming molds with different diameters at both ends, the distance between the rollers at each end can be adjusted to keep the axis of the forming mold horizontal, thus enabling stable and continuous winding forming.

[0015] Furthermore, a pressure roller mechanism is provided on one side of the base frame. The pressure roller mechanism includes a pressure roller rod mounted on the base frame along its length. A pressure roller seat is fixed on the pressure roller rod. The pressure roller seat has a pressure roller arm extending toward the middle of the base frame. A pressure roller that can press against the forming mold is rotatably provided at the end of the pressure roller arm. The pressure roller is parallel to the pressure roller rod.

[0016] In this way, the pressure roller can be used to press the continuously wound strip tightly onto the forming mold, which is especially helpful for the tube end of the continuously wound tube to ensure the forming quality of the wound tube.

[0017] Furthermore, the pressure roller seat has ear plates rotatably sleeved on both sides of the pressure roller rod, and the pressure roller arm is mounted on the two ear plates; there is a pressing mechanism between the bottom of the pressure roller arm and the pressure roller seat for pushing the pressure roller arm upward.

[0018] In this way, the pressure roller arm can be rotated relative to the pressure roller rod by two rotatable ear plates, thereby using the top pressing mechanism to push it upward to ensure that the pressure roller is reliably pressed against the surface of the forming mold.

[0019] Furthermore, the pressure roller seat has a through guide hole and is slidably fitted onto the pressure roller rod; the lower end of the pressure roller seat is provided with a limiting guide part that slides with the base frame or the ground.

[0020] In this way, the pressure roller seat can slide along the length of the guide rod through the guide hole to accommodate the clamping requirements of the ends of the winding tubes of different lengths. In addition, the limiting guide part on the pressure roller seat that slides with the base frame or the ground can ensure the smooth sliding of the pressure roller seat and prevent the pressure roller seat from rotating during the process of applying pressure to the pressure roller arm through the top pressing mechanism.

[0021] Furthermore, the inner walls of the first, second, and third arc-shaped plates each have circumferentially arranged arc-shaped ribs, and multiple arc-shaped ribs are distributed along the length direction of the mold tube.

[0022] A method for producing a socket-type pipe involves first obtaining a forming system for the socket-type pipe as described above, then winding a continuous strip extruded by a feeding mechanism onto a forming die, using a rotary drive mechanism to drive the forming die to rotate, and moving the feeding mechanism and the base frame relative to each other along the length of the base frame, so that adjacent two turns of continuous strip connect with each other to form a composite wound pipe.

[0023] In summary, the present invention has the advantages of reasonable structural design, continuous winding and forming of tubes and sockets, which helps to reduce production costs and improve production efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the molding mechanism in Example 1.

[0025] Figure 2 for Figure 1 A schematic diagram of the structure at one end of the forming mechanism.

[0026] Figure 3 This is a schematic diagram of the overall structure of the molding die.

[0027] Figure 4 This is a schematic diagram showing the placement of the molding die and molding mechanism.

[0028] Figure 5 This is a schematic diagram of the end structure of the molding die.

[0029] Figure 6 This is a structural diagram of the push rod section.

[0030] Figure 7 This is a structural schematic diagram of the tie rod section.

[0031] Figure 8 This is a cross-sectional structural diagram of the pressure roller mechanism.

[0032] Figure 9 This is a schematic diagram of the structure of the mold tube with the hanging column pulled out in Example 2.

[0033] Figure 10 This is a schematic diagram of the base frame in Example 3.

[0034] Figure 11 This is a schematic diagram of the base frame in Example 4.

[0035] Figure 12 This is a schematic diagram of the overall structure of the pressure roller mechanism in Example 5.

[0036] Figure 13 This is a cross-sectional view of the pressure roller mechanism in Example 5.

[0037] Figure 14 This is a schematic diagram of the pressure roller frame in Example 5.

[0038] Figure 15 This is a schematic diagram of the disassembled structure of the pressure roller frame in Example 5. Detailed Implementation

[0039] The present invention will be further described in detail below with reference to the embodiments.

[0040] Example 1: A forming system for a socket-type pipe includes a feeding mechanism for hot extrusion of continuous strip material. The discharge side of the feeding mechanism has a forming mechanism arranged parallel to the feeding mechanism, and the forming mechanism is equipped with a forming mold. Specifically, in this embodiment, as... Figure 1 and Figure 2As shown, the forming mechanism includes a rectangular base 10. Both ends of the base 10 have support seats 20 extending along the width direction. Each support seat 20 has two roller assemblies 30 arranged side-by-side. Each roller assembly 30 includes a base 301 and a roller 302. The roller 302 is rotatably mounted on the base 301 via an axis extending along the length direction of the base 10. The axial projection of the roller 302 completely covers the projection of the base 301. The support seat 20 has a guide rail 201 and a lead screw 202 arranged along the length direction. At least one of the... The base 301 is slidably fitted onto the guide rail 201, and its bottom is fitted onto the lead screw 202 via a lead screw nut, so that the distance between the two bases 301 can be adjusted via the lead screw 202; each of the support seats 20 also has a rotary drive mechanism 40 for driving the molding die to rotate. In this embodiment, two lead screws 202 are coaxially connected, and the two lead screws 202 have opposite directions of rotation; the two bases 301 are respectively fitted onto the two lead screws 202 via lead screw nuts; the rotary drive mechanism 40 is a drive motor connected to either of the rollers 302.

[0041] The base frame 10 has a track 50 extending along its length at its bottom, and the base frame 10 is slidably fitted onto the track 50 by a slider; the base frame 10 has a linear drive mechanism for driving the base frame 10 to move along the track 50. In this embodiment, a rack is also included along the track 50, and the linear drive mechanism includes a geared motor mounted on the base frame 10, with a gear meshing with the rack on the output shaft of the geared motor.

[0042] In the above structure, support seats are provided at both ends of the base frame. Each support seat has two parallel roller assemblies, and the axial projection of the rollers covers the projection of the base, making the rollers protrude relative to the base. This allows the two rollers on each support seat to form an outer circular support structure. Furthermore, since the two bases on the same support seat are respectively fitted onto two lead screws with opposite directions of rotation, the two bases can be adjusted simultaneously while keeping their center position unchanged. In this way, the support center surfaces on the support seats at both ends can also remain unchanged.

[0043] like Figure 3 As shown, the forming mold includes a cylindrical mold tube 1, the outer diameter of which is consistent with the inner diameter of the winding tube to be formed; one end of the mold tube 1 has a socket forming section that protrudes radially outward, the outer diameter of which matches the outer diameter of the winding tube to be formed.

[0044] Before winding, adjust the distance between the rollers on the two support seats according to the diameters at both ends of the forming mold using a lead screw. Support both ends of the forming mold between the two rollers, increasing the distance between the two rollers at the larger diameter end of the forming mold to make the centerline of the forming mold parallel to the centerline of the rollers. Figure 4 As shown. Aligning the centerline of the forming die with the centerline of the roller prevents the forming die from axial movement during rotation, thus improving its rotational stability and ensuring the quality of the pipe winding. During winding, a drive motor rotates one roller. Since the two ends of the forming die are positioned between two rollers, the roller's rotation causes the forming die to rotate, winding the continuous strip extruded by the feeding mechanism onto the forming die. A reduction motor drives a gear to move along a rack, allowing the forming die to move relative to the feeding mechanism along a track during its rotation, connecting the edges of adjacent turns of continuous strip to form the pipe wall.

[0045] Specifically, such as Figure 5 As shown, the mold tube 1 includes a first arc-shaped plate 11, a second arc-shaped plate 12, and a third arc-shaped plate 13 arranged circumferentially. The maximum chord length of the first arc-shaped plate 11, the second arc-shaped plate 12, and the third arc-shaped plate 13 is all less than the minimum inner diameter of the winding tube to be formed. The first arc-shaped plate 11 and the second arc-shaped plate 12 are respectively hinged to both sides of the third arc-shaped plate 13. A support mechanism 2 is retractably provided inside the mold tube 1 to support the first arc-shaped plate 11, the second arc-shaped plate 12, and the third arc-shaped plate 13 in assembling the mold tube 1. The first arc-shaped plate 11 and the second arc-shaped plate 12 can rotate inward sequentially when the support mechanism 2 is retracted. Since the maximum helix length of the first arc-shaped plate, the second arc-shaped plate, and the third arc-shaped plate are all less than the minimum inner diameter of the winding tube, after the first arc-shaped plate and the second arc-shaped plate rotate inward sequentially, the maximum outer circle diameter of the mold tube is less than the minimum inner diameter of the winding tube, thereby allowing the mold tube to be removed from the formed winding tube.

[0046] The inner walls of the first arc-shaped plate 11, the second arc-shaped plate 12, and the third arc-shaped plate 13 are all provided with circumferentially arranged arc-shaped ribs 14, and multiple arc-shaped ribs 14 are distributed along the length of the mold tube 1. Crossbeams 15 are provided on the arc-shaped ribs 14 of the second arc-shaped plate 12 and the third arc-shaped plate 13, and the crossbeams 15 connect the two ends of the arc-shaped ribs 14. Multiple internal support rods 16 are provided between the crossbeams 15 and the arc-shaped ribs 14. The arc-shaped ribs, crossbeams, and internal support rods increase the strength of the first arc-shaped plate, the second arc-shaped plate, and the third arc-shaped plate, preventing deformation after multiple splicings and thus extending the service life of the molding die.

[0047] In practice, the outer diameter of the mold tube 1 is typically 1 to 2 meters; the central angles of the second arc-shaped plate 12 and the third arc-shaped plate 13 are between 140 and 165°; the central angle of the first arc-shaped plate 11 is between 30° and 80°; the side of the first arc-shaped plate 11 opposite to the second arc-shaped plate 12 has a mating surface 19 that can abut against each other, and the mating surface 19 is located on the inward rotation trajectory of the first arc-shaped plate 11. Figure 5 (shown by the dashed line) on the outside; the support mechanism 2 retractably abuts against the inside of the first arc-shaped plate.

[0048] A connecting rod 3 is provided between the first arc plate 11 and the second arc plate 12. The two ends of the connecting rod 3 are hinged to the first arc plate 11 and the second arc plate 12 by a shaft arranged along the axial direction of the mold tube 1. Specifically, the middle part of the connecting rod 3 is bent into an arc shape towards the middle part of the mold tube 1.

[0049] In this embodiment, the support mechanism 2 includes a support seat 21 disposed on the crossbeam 15 of the third arc-shaped plate 13. Multiple support seats 21 are arranged along the axial direction of the mold tube 1. A pull rod 22, axially movable, passes through the multiple support seats 21 along the axial direction of the mold tube 1. The pull rod 22 is rotatably disposed on the support seat 21. The inner side of the first arc-shaped plate 11 has a rotating rod 27 extending along its length. The rotating rod 27 is rotatably disposed on the first arc-shaped plate 11 via a support. A limiting block is provided between the rotating rod 27 and the support to prevent axial movement of the rotating rod 27. The pull rod 22 has a top rod 23 facing the first arc-shaped plate 11. The two ends of the top rod 23 are hinged to the rotating rod 27 and the pull rod 22 via an axis perpendicular to the plane containing the top rod, rotating rod, and pull rod. Figure 6 As shown.

[0050] In this way, the tie rod can be pulled axially. Since the rotating rod cannot move axially, that is, the connection point between the push rod and the rotating rod remains unchanged in the axial direction, while the other end of the push rod moves axially with the tie rod, the distance between the tie rod and the rotating rod will change, causing the first arc plate to rotate inward or outward. At this time, the push rod will rotate around the hinge points at both ends and also rotate in the circumferential direction of the mold tube. At this time, the rotating rod and the tie rod will follow the push rod to make adaptive rotation.

[0051] like Figure 7As shown, the end of the pull rod 22 that protrudes from the support base 21 is provided with an external thread and is threadedly fitted with an adjusting sleeve 24. The outer diameter of the adjusting sleeve 24 is larger than the hole diameter on the support base 21. The outward-facing end of the adjusting sleeve 24 has an adjusting rod 25 coaxially arranged. The diameter of the adjusting rod 25 is smaller than the outer diameter of the adjusting sleeve 24, and the end is provided with a rotating structure for rotating the adjusting rod. In this embodiment, the rotating structure is a hexagonal prism at the end. A limiting cover 26 is installed on the support base 21 and covers the adjusting sleeve 24. The limiting cover 26 has a clearance hole that matches the adjusting rod 25, and the adjusting rod 25 passes through the clearance hole. The limiting cover restricts both ends of the adjusting sleeve within the positioning base and the limiting sleeve. When the adjusting rod is rotated by the rotating structure, the axial position of the adjusting sleeve remains unchanged. The rotation of the adjusting sleeve will drive the pull rod to move axially through the thread, thereby realizing the adjustment of the first arc plate.

[0052] The crossbeam 15 of the third arc-shaped plate 13 has an outer support rod 17 extending toward the second arc-shaped plate 12. Multiple outer support rods 17 are distributed along the axial direction of the mold tube 1. One end of each outer support rod 17 facing the second arc-shaped plate 12 is connected to a longitudinal beam 18 arranged along the axial direction of the mold tube 1. The longitudinal beam provides support for the second arc-shaped plate, thereby limiting the inward rotation angle of the second arc-shaped plate.

[0053] In addition, to allow the continuous strip to be more tightly formed on the surface of the forming mold, a pressure roller mechanism 60 is provided on one side of the base frame 10. The pressure roller mechanism 60 includes a pressure roller rod 601 mounted on the base frame 10 along its length. A pressure roller seat 602 is fixed on the pressure roller rod 601. The pressure roller seat 602 has a pressure roller arm 603 extending toward the middle of the base frame 10. A pressure roller 604 is rotatably mounted at the end of the pressure roller arm 603, which can press against the forming mold. The pressure roller 604 is parallel to the pressure roller rod 601. The pressure roller seat 602 has ear plates on both sides that are rotatably fitted onto the pressure roller rod 601. The pressure roller arm 603 is mounted on the two ear plates. Between the bottom of the pressure roller arm 603 and the pressure roller seat 602, there is a pressing mechanism 605 for pushing the pressure roller arm 603 upward. The pressing mechanism 605 is a cylinder. The pressure roller seat 602 has a through guide hole and is slidably sleeved on the pressure roller rod 601; in this embodiment, the lower end of the pressure roller seat 602 is provided with a limiting guide part that slides with the base frame 10.

[0054] Specifically, two pressure roller mechanisms 60 are provided, one of which corresponds to the diameter change position of the forming mold, and this pressure roller has a first shaft section and a second shaft section, such as... Figure 2As shown, the first shaft segment and the second shaft segment correspond to the larger diameter segment and the smaller diameter segment on the forming mold, respectively, and can respectively abut against the corresponding positions of the forming mold.

[0055] In this way, by having the first and second shaft sections on the pressure roller abut against the diameter change position on the forming mold, the continuous strip at the diameter change section can better fit into the surface of the forming mold, thus making the structure of the diameter change section more stable.

[0056] The forming system of this embodiment features a protruding socket forming section at one end of the mold tube. When the strip profile is spirally wound using the mold tube as a forming die, the formed spiral tube will form a socket with a larger diameter at the socket forming section. Since the outer diameter of the socket forming section matches the outer diameter of the spiral tube, that is, the inner diameter of the formed socket matches the outer diameter of the spiral tube, one end of the spiral tube can be inserted into the socket of another spiral tube for a sealed connection during construction. Because the socket is integrally wound and formed on the mold tube, the connection strength is higher, manual welding is not required, production efficiency is greatly improved, and production costs are reduced.

[0057] Example 2: Based on Example 1, this example also includes the following structure: The inner side of the second arc-shaped plate 12 or the third arc-shaped plate 13 has a fixed guide seat, which is located at the smaller diameter end of the mold tube 1 and extends axially; the guide seat has a sliding hole that passes through the mold tube 1 axially, and a lifting column 4 is axially movable in the sliding hole, with a lifting lug at the outer end of the lifting column 4 for lifting; Figure 9 As shown, the length of the hanging column 4 matches the length of the mold tube 1, and it can be moved into the mold tube 1 along the sliding hole.

[0058] Using the molding system of this embodiment, the following steps are taken during production: S1. Adjust the distance between the rollers on the two support seats, and place both ends of the mold tube on the rollers of the two support seats respectively, so that the axis of the mold tube is in a horizontal state. S2. Ensure that the hanging column moves into the mold tube along the sliding hole, and initially wrap the continuous strip material that is hot-extruded from the discharge end of the feeding mechanism around the mold tube. Use the rotary drive mechanism to drive the forming mold to rotate, and move the feeding mechanism and the base frame relative to each other along the length of the base frame, so that the adjacent two turns of continuous strip material are connected to each other to form a composite winding tube. S3. After the winding molding is completed, rotate the hanging column 4 to the highest point of the mold tube, hang the lifting device on the lifting lug, pull the hanging column 4 out along the sliding hole and lift it upwards so that the smaller diameter end of the mold tube is separated from the bottom roller. S4. Rotate the adjusting rod 25, and through the mating thread between the adjusting sleeve 24 and the pull rod 22, pull the pull rod 22 to rotate the first arc plate inward, and the second and third arc plates rotate relative to each other at the same time, so that the mold tube shrinks to the demolding state; and the formed composite winding tube is demolded from the surface of the mold tube. S5. Move the demolded composite spiral tube to the hanging column and lower the mold tube onto the rollers to form a stable support; S6. After removing the lifting equipment, take out the composite spiral wound tube and move the lifting column into the mold tube. Then, restore the mold tube to its working state by adjusting the rod.

[0059] Example 3: Based on Example 2, in order to better remove the composite spiral tube, this example also includes the following structure: like Figure 10 As shown, the base frame 10 has a slide rail 101 arranged along the length direction, and one of the support seats 20 is slidably arranged on the slide rail 101. The base frame 10 has a ball screw 102 arranged parallel to the slide rail 101. The bottom of the support seat 20 is mounted on the nut of the ball screw 102. One end of the ball screw 102 is connected to a motor 103, and the motor 103 is mounted on the base frame 10 through a bracket.

[0060] Using the molding system of this embodiment, the following steps are taken during production: S1. Move the support base 10 along the slide rail 101 so that the distance between the two support bases matches the length of the mold tube; adjust the distance between the rollers on the two support bases and place both ends of the mold tube on the rollers of the two support bases respectively, so that the axis of the mold tube is in a horizontal state. S2. Ensure that the hanging column moves into the mold tube along the sliding hole, and initially wrap the continuous strip material that is hot-extruded from the discharge end of the feeding mechanism around the mold tube. Use the rotary drive mechanism to drive the forming mold to rotate, and move the feeding mechanism and the base frame relative to each other along the length of the base frame, so that the adjacent two turns of continuous strip material are connected to each other to form a composite winding tube. S3. After the winding molding is completed, rotate the hanging column 4 to the highest point of the mold tube, hang the lifting device on the lifting lug, pull the hanging column 4 out along the sliding hole and lift it upwards so that the smaller diameter end of the mold tube is separated from the bottom roller. S4. Rotate the adjusting rod 25, and through the mating thread between the adjusting sleeve 24 and the pull rod 22, pull the pull rod 22 to rotate the first arc plate inward, and the second and third arc plates rotate relative to each other at the same time, so that the mold tube shrinks to the demolding state; and the formed composite winding tube is demolded from the surface of the mold tube. S5. Move the support base 20 along the slide rail 101 to the middle of the base frame 10, lower the mold tube, and place the middle of the composite winding tube on the two rollers of the support base 20 below to reduce the contact area between the composite winding tube and the mold tube; move the support base 20 along the slide rail 101 toward the hanging column, driving the composite winding tube toward the hanging column, and in coordination with the lifting and the movement of the support base 20, move the composite winding tube completely onto the hanging column; S6. Move the support seat 20 back and lower the mold tube onto the rollers to form a stable support; remove the lifting device, take out the composite winding tube, and move the lifting column into the mold tube. Then, restore the mold tube to its working state by adjusting the rod.

[0061] Example 4: Based on Example 3, this example includes two sets of support seats 20 on the slide rail 101, and two ball screws. The two sets of support seats 20 are respectively connected to the nuts of the two ball screws. A motor 103 is connected to the end of each ball screw. Figure 11 As shown. In this way, during the removal of the composite spiral wound tube, the composite spiral wound tube can be lifted simultaneously by two movable support seats while in a lifting state, further reducing the contact area between the composite spiral wound tube and the mold tube. This allows for faster movement of the composite spiral wound tube, moving it outward more quickly. Once the composite spiral wound tube has moved out of half the mold tube space, the middle support seat can be placed below the mold tube, reducing the distance between the two rollers to increase the support height. The mold tube can then be lowered onto the rollers of the lower support seat for support. At this point, since the mold tube is already supported by two support seats, the lifting device can be removed from the lifting column and then hung at the opening of the composite spiral wound tube. With the help of the outer support seat, the composite spiral wound tube can be removed from the mold tube.

[0062] In this method, the lifting column only participates in the removal process of the first half of the composite spiral pipe. Its extension length is relatively short, which can reduce the bending moment borne by the lifting column, avoid bending of the lifting column, and help extend its service life.

[0063] Example 5: Based on Examples 1-4, this example provides a pressure roller structure that can better adapt to the surface shape of the composite wound tube, such as... Figures 12-15As shown, the device includes a mounting frame and a sheet-like pressure roller frame 701. The mounting frame includes a support shaft 702. One end of the pressure roller frame 701 is rotatably mounted on the support shaft 702, and the other end is rotatably provided with a pressure roller plate 703. The axis of the pressure roller plate 703 is parallel to the support shaft 702. Multiple pressure roller frames 701 are arranged side by side along the support shaft 702. The mounting frame includes side plates 704 connected to both ends of the support shaft 702. Two side plates 704 are tightly disposed on the outer side of the multiple pressure roller frames 701. The side of the pressure roller plate 703 that protrudes from the support shaft 702 relative to the pressure roller frame 701 is the pressing side. Each pressure roller frame 701 has an elastic reset member 705 between itself and the mounting frame to rotate the pressure roller frame 701 toward the pressing side.

[0064] like Figure 12 As shown, a limiting plate 706 is connected between the two side plates 704. The limiting plate 706 is located on the side of the pressure roller frame 701 away from the support shaft 702. The limiting plate 706 has a limiting strip protruding towards the pressure roller frame 701, and the limiting strip is located on the pressing side of the pressure roller frame 701. A beam plate 707 is connected between the two side plates 704. The beam plate 707 is located on the side of the support shaft 702 facing the pressing side. The elastic reset member 705 is a tension spring connected between the beam plate 707 and the pressure roller frame 701.

[0065] like Figure 14 and Figure 15 As shown, the pressure roller frame 701 has a semi-circular groove, the diameter of which matches the diameter of the pressure roller plate 703. The pressure roller plate 703 is rotatably fitted within the groove, and its thickness is the same as that of the pressure roller frame 701. A limiting block 708 is installed on one side of the groove. The inner side of the limiting block 708 has an arc surface concentrically connected to the groove, and the sum of the central angle of the arc surface and the central angle of the groove is greater than 180°. The pressure roller plate 703 is rotatably fitted onto the arc surface. Specifically, a threaded hole is provided on one side of the groove, and a bolt hole matching the threaded hole is provided through the limiting block 708. The limiting block 708 is installed on the threaded hole by a bolt passing through the bolt hole. To make the pressure roller rotate more smoothly, the inner wall of the roller groove has rotatable balls. Multiple balls are evenly distributed along the circumference of the roller groove, and the outer surface of the pressure roller 703 is fitted onto the multiple balls.

[0066] The pressure roller structure of this embodiment features a plate-shaped pressure roller frame with multiple pressure roller frames arranged side-by-side on the support shaft. Each pressure roller frame has an elastic reset element between itself and the mounting frame. In this way, the pressure roller plates on multiple pressure roller frames combine to form a pressure roller. When the continuous strip is pressed against the surface of the forming mold, the reaction force borne by each pressure roller frame is independent. As the outer diameter of the forming mold surface changes, the rotation angle of each pressure roller frame relative to the support shaft is also different. This allows it to adapt to forming molds of different diameters, ensuring that the continuous strip is always in contact with the surface of the forming mold, which is beneficial to improving the forming quality of the wound tube.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A forming system for a socket-type pipe, comprising a feeding mechanism for hot extrusion of a continuous strip, wherein a forming mechanism is provided at the discharge end of the feeding mechanism; characterized in that, The forming mechanism includes a rectangular base (10) with support seats (20) extending along the width direction at both ends of the base (10). Each support seat (20) has two roller assemblies (30) arranged side-by-side. Each roller assembly (30) includes a base (301) and a roller (302). The roller (302) is rotatably mounted on the base (301) via an axis extending along the length direction of the base (10). The axial projection of the roller (302) completely covers the projection of the base (301). The support seat (20) has a guide rail (201) and a lead screw (202) arranged along the length direction. At least one base (301) is slidably fitted onto the guide rail. On the support base (201), and the bottom is connected to the lead screw (202) by a lead screw nut, so that the distance between the two bases (301) can be adjusted by the lead screw (202); a forming mold is mounted on the two support bases (20), the forming mold includes a cylindrical mold tube (1), the outer diameter of the mold tube (1) is consistent with the inner diameter of the winding tube to be formed; one end of the mold tube (1) has a socket forming section that protrudes radially outward, the outer diameter of the socket forming section matches the outer diameter of the winding tube to be formed; the two ends of the mold tube (1) are respectively mounted on two rollers (302) of the corresponding support base (20); each support base (20) also has a rotary drive mechanism (40) for driving the forming mold to rotate.

2. The forming system for socket-type pipes as described in claim 1, characterized in that, The mold tube (1) includes a first arc plate (11), a second arc plate (12) and a third arc plate (13) spliced ​​together in the circumferential direction. The maximum chord length of the first arc plate (11), the second arc plate (12) and the third arc plate (13) is smaller than the minimum inner diameter of the winding tube to be formed. The first arc plate (11) and the second arc plate (12) are respectively hinged to both sides of the third arc plate (13). The mold tube (1) is retractably provided with a support mechanism (2) for supporting the first arc plate (11), the second arc plate (12) and the third arc plate (13) to form the mold tube (1). The first arc plate (11) and the second arc plate (12) can rotate inward in sequence when the support mechanism (2) is retracted.

3. The forming system for socket-type pipes as described in claim 1, characterized in that, The bottom of the base frame (10) has a track (50) extending along the length direction, and the base frame (10) is slidably fitted on the track (50) by a slider; the base frame (10) has a linear drive mechanism for driving the base frame (10) to move along the track (50).

4. The forming system for socket-type pipes as described in claim 3, characterized in that, It also includes a rack arranged along the track (50), and the linear drive mechanism includes a geared motor arranged on the base frame (10), and the output shaft of the geared motor is provided with a gear that meshes with the rack.

5. The forming system for socket-type pipes as described in claim 1, characterized in that, Two lead screws (202) are coaxially connected and the two lead screws (202) have opposite directions of rotation; two bases (301) are respectively fitted onto the two lead screws (202) by lead screw nuts.

6. The forming system for socket-type pipes as described in claim 1, characterized in that, A pressure roller mechanism (60) is provided on one side of the base frame (10). The pressure roller mechanism (60) includes a pressure roller rod (601) mounted on the base frame (10) along the length direction. A pressure roller seat (602) is fixed on the pressure roller rod (601). The pressure roller seat (602) has a pressure roller arm (603) extending toward the middle of the base frame (10). The end of the pressure roller arm (603) is rotatably provided with a pressure roller (604) that can press against the molding die. The pressure roller (604) is parallel to the pressure roller rod (601).

7. The forming system for socket-type pipes as described in claim 6, characterized in that, The pressure roller seat (602) has ear plates on both sides that are rotatably sleeved on the pressure roller rod (601), and the pressure roller arm (603) is mounted on the two ear plates; there is a pressing mechanism (605) between the bottom of the pressure roller arm (603) and the pressure roller seat (602) for pushing the pressure roller arm (603) upward.

8. The forming system for socket-type pipes as described in claim 7, characterized in that, The pressure roller seat (602) has a through guide hole and is slidably sleeved on the pressure roller rod (601); the lower end of the pressure roller seat (602) is provided with a limiting guide part that slides with the base frame (10) or the ground.

9. The forming system for socket-type pipes as described in claim 2, characterized in that, The inner walls of the first arc plate (11), the second arc plate (12) and the third arc plate (13) are all provided with arc ribs (14) arranged in the circumferential direction. Multiple arc ribs (14) are distributed along the length direction of the mold tube (1).

10. A method for producing a socket-type pipe, characterized in that, First, obtain the forming system of the socket pipe as described in any one of claims 1 to 9, wrap the continuous strip extruded by the feeding mechanism around the forming mold, drive the forming mold to rotate using a rotary drive mechanism (40), and move the feeding mechanism and the base frame relative to each other along the length of the base frame, so that adjacent two turns of continuous strip connect with each other to form a composite wound pipe.

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