Coil billet unwinding device and automatic tube unwinding device

Abstract

The present invention discloses a coil billet unwinding device and an automatic pipe unwinding device, which belong to the field of coil processing equipment. The pipe material will not be scattered when unwinding. The coil billet unwinding device of the present invention comprises a fixed frame, on which two uncoilers arranged back to back are arranged, each uncoiler comprises an expansion and contraction mechanism for fixing the pipe material and a discharge device for driving the expansion and contraction mechanism to rotate, a pipe billet guide frame for limiting the discharge direction is arranged above the fixed frame, and pipe material pushing devices corresponding to the uncoilers are respectively arranged on both sides of the fixed frame, and the pipe material pushing device comprises a material blocking frame, a rotating arm slidably mounted on the material blocking frame, and a material blocking plate mounted on the rotating arm, and when the pipe material is fixed to the expansion and contraction mechanism, the material blocking plate is against the end of the pipe material.

Description

[Technical field]

[0001] The invention relates to the field of coil processing equipment, in particular to a coil blank unwinding device and a pipe material automatic unwinding device. [Background technology]

[0002] In the prior art, an uncoiler is used when unwinding a coil. The coiled pipe material is in a spiral shape. When it is placed without any obstruction, the weight of the pipe material and the elasticity of its spiral shape cause the pipe material to be placed on the uncoiler in a disordered layer. During the unwinding process, the uncoiler will be stuck and cannot be unwound smoothly. [Summary of the invention]

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and propose a coiled tube blank unwinding device so that the tube material will not be scattered during unwinding.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The coiled pipe billet uncoiling device comprises a fixed frame, on which are provided two uncoilers arranged back to back, each uncoiler comprising an expansion and contraction mechanism for fixing the pipe material and a discharge device for driving the expansion and contraction mechanism to rotate, a pipe billet guide frame for limiting the discharge direction is provided above the fixed frame, and pipe material pushing devices corresponding to the uncoilers are provided on both sides of the fixed frame, the pipe material pushing device comprises a material blocking frame, a rotating arm slidably mounted on the material blocking frame, and a material blocking plate mounted on the rotating arm, and when the pipe material is fixed to the expansion and contraction mechanism, the material blocking plate abuts against the end of the pipe material.

[0006] The present invention proposes an unwinding device for spreading out a coiled pipe. Two unwinding machines are arranged on a fixed frame, and the unwinding operation of the pipe material can be performed simultaneously. The pipe material is transported to the expansion and contraction mechanism and fixed by the expansion and contraction mechanism. The unwinding device drives the expansion and contraction mechanism to rotate, and can simultaneously drive the pipe material to rotate. After the pipe material is rotated, the unwinding operation can be started. The rotating arm is slidably installed on the material blocking frame. After the pipe material is installed on the expansion and contraction mechanism, it slides on the material blocking frame so that the material blocking plate abuts against the end of the pipe material, and the pipe material is pressed against the expansion and contraction mechanism to avoid spreading or misalignment of the pipe material before the coiling starts. The unwinding mechanism is arranged with its back to the material, and the pipe material can be fed to the unwinding machine from different positions on the fixed frame, which is more convenient, and the operation of the unwinding machine will not be affected during the feeding process.

[0007] Furthermore, the uncoiler also includes a bearing seat arranged on the fixed frame, the expansion and contraction mechanism includes an axis body movably connected to the bearing seat and a pipe material mounting plate rotatably mounted on the bearing seat, a plurality of drum pieces are slidably mounted on the pipe material mounting plate, one end of the axis body is connected to the expansion and contraction power member, and the other end passes through the pipe material mounting plate and is hinged with the plurality of drum pieces to control the sliding of the plurality of drum pieces relative to the center of the pipe material mounting plate. Before being fixed, the pipe material is first placed on the pipe material mounting plate, and the plurality of drum pieces pass through the inner ring of the pipe material to keep the pipe material on the pipe material mounting plate. The expansion and contraction power member drives the axis body to move (such as telescopic, rotating, etc.), so that the plurality of drum pieces change position, so that the plurality of drum pieces fit with the inner ring of the pipe material, tighten the pipe material, and complete the fixing of the pipe material. When the expansion and contraction mechanism rotates, there will be no relative sliding between the pipe material and the pipe material mounting plate, thereby ensuring the normal operation of the uncoiler operation.

[0008] Furthermore, the unloading device is arranged on the fixed frame below the expansion and contraction mechanism, and the unloading device comprises an unloading motor and an unloading gear drivingly matched with the unloading motor, and the unloading gear is circumferentially meshed with the pipe material mounting plate to drive the pipe material mounting plate to rotate. When the unloading motor drives the unloading gear to rotate, the unloading gear can drive the pipe material mounting plate to rotate through meshing, so as to drive the pipe material to rotate synchronously.

[0009] Further, the material blocking disk includes a first disk rack and a second disk rack rotatably mounted on the rotating arm, the first disk rack and the second disk rack are connected by a plurality of columns to keep the spacing between the first disk rack and the second disk rack, the second disk rack is provided with a through hole and a plurality of slots arranged along the circumference of the through hole, the number and shape of the slots match the drum sheet, so as to realize the plug-in cooperation between the material blocking disk and the plurality of drum sheets. When the material blocking disk is used to press the pipe material, with the movement of the rotating arm, the plurality of drum sheets can be inserted between the first disk rack and the second disk rack through the through hole, the length of the drum sheet extending between the two is determined by the specifications of the pipe material, and the plurality of columns make a large space between the first disk rack and the second disk rack, so as to cope with pipe materials of different specifications; the plurality of drum sheets clamp the pipe material after moving, and the drum sheets are also clamped into the slots at the same time, when the pipe material mounting disk rotates, the material blocking disk can also rotate accordingly, and the pipe material is blocked during the unwinding process, and there will be no relative rotation between the material blocking disk and the plurality of drum sheets, so the wear between the two is small, and there will be no collision.

[0010] Furthermore, the material blocking frame is provided with a guide rail, the rotating arm includes a sliding seat and a swing arm that is rotatably matched with the sliding seat, the sliding seat is slidably mounted on the guide rail, and a swing arm oil cylinder is also hingedly mounted on the sliding seat, and the piston rod of the swing arm oil cylinder is hingedly connected to the swing arm to control the swing of the swing arm. The swing arm oil cylinder provides power for the swing arm to swing relative to the sliding seat, and when the swing arm swings, it can drive the material blocking plate to swing synchronously. When the pipe material needs to be installed on the expansion and contraction mechanism, the oil cylinder controls the swing arm to swing upward, so that the pipe material can be installed on the expansion and contraction mechanism smoothly and without obstruction. After the installation is completed, the swing arm is reset, and the material blocking plate presses the pipe material by sliding the sliding seat on the guide rail.

[0011] Furthermore, a torque motor is provided on the material blocking frame, and the torque motor is transmission-connected to a threaded rod threadedly matched with the sliding seat, and the threaded rod is arranged along the length direction of the guide rail. The torque motor can provide a large torsional force, and as the sliding seat slides, the material blocking plate is transported to the expansion and contraction mechanism, and the material blocking plate is pressed against the pipe material. The large torque provided by the torque motor can ensure that the material blocking plate can press the pipe material tightly, and the threaded match between the threaded rod and the sliding seat also keeps the position of the sliding seat on the guide rail unchanged.

[0012] Further, multiple groups of limiting rotating wheels are rotatably installed on the tube blank guide frame, each group of limiting rotating wheels includes two limiting rotating wheels correspondingly arranged above and below, and the limiting rotating wheels include a rotating sleeve and a rotating baffle plate arranged on both sides of the rotating sleeve, so as to limit the tube material between the two limiting rotating wheels, and the transmission direction of the tube material is limited by the multiple groups of limiting rotating wheels. After the tube material is unrolled, the separated single tube material is collected from the top of the fixed frame, and the tube material can be straightened to a certain extent after passing through the multiple groups of limiting rotating wheels, and the tube material is limited, so that the separated tube material will not affect the tube material being unrolled on the expansion and contraction mechanism, and the limiting rotating wheel can also rotate, and when the tube material passes between the two limiting rotating wheels, it can simultaneously drive the limiting rotating wheel to rotate, reducing the friction between the tube material and the limiting rotating wheel, and the rotating baffle plate can limit the radial displacement of the tube material during the transmission of the tube material on the tube blank guide frame, and limit the tube material between the two limiting rotating wheels, thereby limiting the discharge position of the tube material.

[0013] Furthermore, the fixed frame is also provided with a material discharge detection device, which includes a speed detector and a transmission wheel connected to the speed detector. After the tube material passes around the lower end of the transmission wheel from the expansion and contraction mechanism, it enters the tube blank guide frame upward. The tube material passes around the transmission wheel, so that the tube material drives the transmission wheel to rotate synchronously during the transmission process. The speed detector can detect the transmission of the transmission wheel to obtain the transmission speed of the tube material. In addition, it can be judged whether there is still tube material on the uncoiler according to the rotation speed of the transmission wheel.

[0014] The automatic tube unwinding device comprises the above-mentioned coil tube unwinding device, and automatic feeding devices for conveying tubes to the coil tube unwinding device are arranged on both sides of the coil tube unwinding device. The automatic feeding device can convey tubes to the unwinding machine, and the coil tube unwinding device can transfer the tubes from the automatic feeding device to the coil tube unwinding device and perform unwinding operation through the cooperation of the expansion and contraction mechanism and the tube pushing device, thereby realizing automated operation, reducing manpower input, and improving work efficiency.

[0015] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

Brief Description of the Drawings

[0016] The present invention will be further described below in conjunction with the accompanying drawings:

[0017] Figure 1 It is a structural schematic diagram of the unwinding device in an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0019] Figure 3 for Figure 1 The local axonometric view at B in the middle;

[0020] Figure 4 It is an axonometric diagram of the unwinding device in the embodiment of the present invention;

[0021] Figure 5 Schematic diagram of the structure of the automatic unwinding device for pipe material in an embodiment of the present invention.

[0022] Reference numerals:

[0023] Fixed rack 100;

[0024] Uncoiler 200, bearing seat 210, shaft body 220;

[0025] An expansion and contraction mechanism 300, a tube material mounting plate 310, a drum sheet 320, an expansion and contraction power member 330, and a hinge rod 340;

[0026] A material discharge device 400, a material discharge motor 410, and a material discharge gear 420;

[0027] The tube blank guide frame 500, the position-limiting rotating wheel 510, the rotating sleeve 511, and the rotating baffle 512;

[0028] The pipe material propulsion device 600, the material blocking frame 610, the guide rail 611, the torque motor 612, the threaded rod 613, the rotating arm 620, the sliding seat 621, the swing arm 622, the swing arm cylinder 623, the material blocking plate 630, the first plate frame 631, the second plate frame 632, the column 633, the through hole 634, and the slot 635;

[0029] Material discharge detection device 700, speed detector 710, transmission wheel 720;

[0030] Automatic feeding device 800. [Specific implementation method]

[0031] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly specified.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] Reference Figures 1 to 4 The embodiment of the present invention proposes a coil billet uncoiling device, comprising a fixed frame 100, on which two back-to-back uncoilers 200 are arranged, each uncoiler 200 comprises an expansion and contraction mechanism 300 for fixing the pipe material and a discharge device 400 for driving the expansion and contraction mechanism 300 to rotate, and a pipe billet guide frame 500 for limiting the discharge direction is arranged above the fixed frame 100.

[0037] The unwinding device of this embodiment is used to spread out the coiled pipe. Two unwinding machines 200 are arranged on the fixed frame 100, which can simultaneously unwind the pipe material. During the operation, the pipe material is transported to the expansion and contraction mechanism 300 and fixed by the expansion and contraction mechanism 300. The unwinding device 400 drives the expansion and contraction mechanism 300 to rotate, which can simultaneously drive the pipe material to rotate. After the pipe material is rotated, the unwinding operation can be started. With the unwinding machine 200 arranged in back, the pipe material can be fed to the unwinding machine 200 from different positions on the fixed frame 100, which is more convenient, and the operation of the unwinding machine 200 will not be affected during the feeding process.

[0038] Specifically: the uncoiler 200 also includes a bearing seat 210 arranged on the fixed frame 100, the expansion and contraction mechanism 300 includes a shaft body 220 movably connected to the bearing seat 210 and a pipe material mounting plate 310 rotatably mounted on the bearing seat 210, a plurality of drum pieces 320 are slidably mounted on the pipe material mounting plate 310, and the pipe material is first placed on the pipe material mounting plate 310 before being fixed, and the plurality of drum pieces 320 pass through the inner ring of the pipe material to keep the pipe material on the pipe material mounting plate 310, and one end of the shaft body 220 is connected to the expansion and contraction mechanism 300. The other end of the power piece 330 passes through the tube mounting disk 310 and is hinged with the plurality of drum pieces 320 to control the sliding of the plurality of drum pieces 320 relative to the center of the tube mounting disk 310. The expansion and contraction power piece 330 drives the shaft body 220 to move, so that the positions of the plurality of drum pieces 320 change, and the plurality of drum pieces 320 fit with the inner circle of the tube material, tightening the tube material and completing the fixation of the tube material. When the expansion and contraction mechanism 300 rotates, there will be no relative sliding between the tube material and the tube mounting disk 310, thereby ensuring the normal operation of the unwinding operation.

[0039] The expansion and contraction power part 330 is fixedly installed on the bearing seat 210 and can be an expansion and contraction motor. The shaft body 220 is provided with a threaded part for installing the output shaft of the expansion and contraction motor. A hinge rod 340 is provided between the drum piece 320 and the shaft body 220. The two ends of the hinge rod 340 are hinged to the shaft body 220 and the drum piece 320 respectively. The circumferential rotation of the shaft body 220 is restricted by multiple drum pieces 320. The shaft body 220 and the bearing seat 210 are slidably matched. When the expansion and contraction motor drives the output shaft to rotate, the shaft body 220 moves axially along the output shaft, and the drum piece 320 is controlled to move outward by the hinge rod 340, thereby realizing the tightening of the pipe material. When the expansion and contraction motor is reversed, the drum piece 320 moves inward.

[0040] Alternatively, the expansion and contraction power part 330 can be an expansion and contraction cylinder, the shaft body 220 and the bearing seat 210 are slidably matched, and the drum piece 320 and the shaft body 220 are also connected by a hinge rod 340. When the expansion and contraction cylinder drives the shaft body 220 to extend, the hinge rod 340 controls the drum piece 320 to move outward to achieve the tightening of the pipe material. When the expansion and contraction cylinder drives the shaft body 220 to retract, the drum piece 320 moves inward.

[0041] The unloading device 400 is arranged on the fixed frame 100 at a position below the expansion and contraction mechanism 300. The unloading device 400 includes a unloading motor 410 and a unloading gear 420 that cooperates with the unloading motor 410. An outer gear ring is provided on the outer periphery of the pipe material mounting disk 310 to enable the pipe material mounting disk 310 to engage with the unloading gear 420. When the unloading motor 410 drives the unloading gear 420 to rotate, the unloading gear 420 can drive the pipe material mounting disk 310 to rotate through engagement, so as to drive the pipe material to rotate synchronously.

[0042] Reference Figures 1 to 4 In another embodiment of the present invention, based on the above embodiment, a pipe material pushing device 600 corresponding to the uncoiler 200 is respectively provided on both sides of the fixed frame 100, and the pipe material pushing device 600 includes a material blocking frame 610, a rotating arm 620 slidably mounted on the material blocking frame 610, and a material blocking plate 630 mounted on the rotating arm 620. After the pipe material is installed on the expansion and contraction mechanism 300, the rotating arm 620 slides on the material blocking frame 610, so that the material blocking plate 630 is abutted against the end of the pipe material, and the pipe material is pressed against the expansion and contraction mechanism 300 to avoid the pipe material from spreading or staggering before the coiling begins.

[0043] The material-blocking plate 630 includes a first plate frame 631 and a second plate frame 632 rotatably mounted on the rotating arm 620. The first plate frame 631 and the second plate frame 632 are connected by a plurality of columns 633 so as to maintain a distance between the first plate frame 631 and the second plate frame 632. A through hole 634 is provided on the second plate frame 632 to realize the plug-in cooperation between the material-blocking plate 630 and the plurality of drum sheets 320. When the material-blocking plate 630 is used to press the pipe material, as the rotating arm 620 moves, the plurality of drum sheets 320 can be inserted into between the first plate frame 631 and the second plate frame 632 through the through hole 634. The length of the drum sheet 320 extending between the two is determined by the specifications of the pipe material, and The multiple columns 633 create a larger space between the first disk rack 631 and the second disk rack 632, which can handle pipes of different specifications. The second disk rack 632 is also provided with multiple slots 635 circumferentially arranged along the through hole 634. The number and shape of the slots 635 match the drum piece 320. The multiple drum pieces 320 clamp the pipes after moving, and the drum pieces 320 are also clamped into the slots 635 at the same time. When the pipe mounting disk 310 rotates, the material blocking disk 630 can also rotate accordingly to block the pipe during the unwinding process, and there will be no relative rotation between the material blocking disk 630 and the multiple drum pieces 320, so there is less wear between the two and no collision.

[0044] In order to prevent the rotating arm 620 from hindering the loading of materials onto the uncoiler 200, the rotating arm 620 can be turned up and down relative to the uncoiler 200. Specifically, a guide rail 611 is arranged on the material blocking frame 610, and the rotating arm 620 includes a sliding seat 621 and a swing arm 622 that rotates with the sliding seat 621. The sliding seat 621 is slidably mounted on the guide rail 611, and a swing arm cylinder 623 is also hingedly mounted on the sliding seat 621. The piston rod of the swing arm cylinder 623 is hingedly connected to the swing arm 622 to control the swing arm 621. 22 swings, the swing arm cylinder 623 provides power for the swing arm 622 to swing relative to the sliding seat 621. When the swing arm 622 swings, it can drive the baffle plate 630 to swing synchronously. When the pipe material needs to be installed on the expansion and contraction mechanism 300, the cylinder controls the swing arm 622 to swing upward, so that the pipe material can be installed on the expansion and contraction mechanism 300 smoothly and without obstruction. After the installation is completed, the swing arm 622 is reset, and the sliding seat 621 slides on the guide rail 611 to make the baffle plate 630 press the pipe material.

[0045] A torque motor 612 is provided on the material blocking frame 610, and the torque motor 612 is transmission-connected to a threaded rod 613 which is threadedly matched with the sliding seat 621. The threaded rod 613 is arranged along the length direction of the guide rail 611. The torque motor 612 can provide a large torsional force. As the sliding seat 621 slides, the material blocking plate 630 is transported toward the expansion and contraction mechanism 300, and the material blocking plate 630 is pressed against the pipe material. The large torque provided by the torque motor 612 can ensure that the material blocking plate 630 can press the pipe material tightly, and the threaded match between the threaded rod 613 and the sliding seat 621 also keeps the position of the sliding seat 621 on the guide rail 611 unchanged.

[0046] In order to guide the delivery of the unwinding tube material, in another embodiment of the present invention, referring to Figure 2 and Figure 4 A plurality of sets of limiting rotating wheels 510 are rotatably installed on the tube guide frame 500, each set of limiting rotating wheels 510 includes two limiting rotating wheels 510 correspondingly arranged in the upper and lower parts, and the limiting rotating wheels 510 include a rotating sleeve 511 and rotating baffles 512 arranged on both sides of the rotating sleeve 511, so as to limit the tube material between the two limiting rotating wheels 510, and the transmission direction of the tube material is limited by the plurality of sets of limiting rotating wheels 510.

[0047] After the tube is uncoiled, the separated single tube is collected from the top of the fixed frame 100. After the tube passes through the multiple sets of limiting rotating wheels 510, it can be straightened to a certain extent and the tube is limited, so that the separated tube will not affect the tube being uncoiled on the expansion and contraction mechanism 300. The limiting rotating wheel 510 can also rotate. When the tube passes between the two limiting rotating wheels 510, it can drive the limiting rotating wheel 510 to rotate at the same time, reducing the friction between the tube and the limiting rotating wheel 510. During the transmission of the tube on the tube guide frame 500, the rotating baffle 512 can limit the radial displacement of the tube, limit the tube between the two limiting rotating wheels 510, and define the discharge position of the tube.

[0048] In order to detect the transmission speed of the pipe material, refer to Figure 2 In another embodiment of the present invention, based on the above embodiment, a material discharge detection device 700 is further provided on the fixed frame 100, and the material discharge detection device 700 includes a speed detector 710 and a transmission wheel 720 connected to the speed detector 710. After the tube material bypasses the lower end of the transmission wheel 720 from the expansion and contraction mechanism 300, it enters the tube blank guide frame 500 upward. The tube material bypasses the transmission wheel 720, so that the tube material drives the transmission wheel 720 to rotate synchronously during the transmission process. The speed detector 710 can detect the transmission of the transmission wheel 720 to obtain the transmission speed of the tube material.

[0049] In addition, it is possible to determine whether there are still pipes on the uncoiler 200 based on the rotation speed of the transmission wheel 720, and to determine whether there are still unreeled pipes on the pipe mounting disk 310 based on this signal. When the rotation speed of the transmission wheel 720 becomes zero, the device can determine that the pipes on the pipe mounting disk 310 have been unreeled, and can stop the unloading device 400 from rotating the pipe mounting disk 310, and reset the pipe pushing device 600, so that the processed pipes can be transported to the uncoiler 200.

[0050] Reference Figure 5 The present invention also proposes an automatic tube unwinding device, including the above-mentioned coiled tube billet unwinding device, and automatic feeding devices 800 for conveying tube materials to the coiled tube billet unwinding device are arranged on both sides of the coiled tube billet unwinding device, and the automatic feeding devices 800 can convey tube materials to the unwinding machine 200, and the coiled tube billet unwinding device can transfer the tube materials from the automatic feeding device 800 to the coiled tube billet unwinding device and perform unwinding operations through the cooperation of the expansion and contraction mechanism 300 and the tube material pushing device 600, thereby realizing automated operation, reducing manpower input, and improving work efficiency.

[0051] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. Coil billet unwinding device, characterized in that: The uncoiler comprises a fixed frame, wherein two uncoilers are arranged back to back on the fixed frame, each uncoiler comprises an expansion and contraction mechanism for fixing the pipe material and a feeding device for driving the expansion and contraction mechanism to rotate, a pipe blank guide frame for limiting the feeding direction is provided above the fixed frame, and pipe material pushing devices corresponding to the uncoilers are provided on both sides of the fixed frame, and the pipe material pushing device comprises a blocking frame, a rotating arm slidably mounted on the blocking frame, and a blocking plate mounted on the rotating arm, and when the pipe material is fixed to the expansion and contraction mechanism, the blocking plate abuts against the end of the pipe material; a guide rail is provided on the blocking frame, and the rotating arm comprises a sliding seat and a swing arm rotatably matched with the sliding seat, and the sliding seat The cam is mounted on a first plate and a second plate is connected to the cam by a plurality of levers, the lever being mounted on the guide rails and the support frame being connected to the guide rails.

2. The coil billet unwinding device according to claim 1, characterized in that: The uncoiler also includes a bearing seat arranged on the fixed frame, the expansion and contraction mechanism includes an axis body movably connected to the bearing seat and a pipe material mounting disk rotatably mounted on the bearing seat, a plurality of drum pieces are slidably mounted on the pipe material mounting disk, one end of the axis body is connected to the expansion and contraction power member, and the other end passes through the pipe material mounting disk and is hinged to the plurality of drum pieces to control the sliding of the plurality of drum pieces relative to the center of the pipe material mounting disk.

3. The coil billet unwinding device according to claim 2, characterized in that: The discharging device is arranged on the fixed frame below the expansion and contraction mechanism, and comprises a discharging motor and a discharging gear drivingly matched with the discharging motor, and the discharging gear is circumferentially meshed with the pipe material mounting disk to drive the pipe material mounting disk to rotate.

4. The coil billet unwinding device according to claim 2, characterized in that: The second disc frame is provided with a through hole and a plurality of slots arranged along the circumference of the through hole. The number and shape of the slots match the drum sheet to achieve plug-in cooperation between the retaining disc and the plurality of drum sheets.

5. The coil billet unwinding device according to claim 1, characterized in that: The material blocking frame is provided with a torque motor, the torque motor is transmission-connected to a threaded rod threadably matched with the sliding seat, and the threaded rod is arranged along the length direction of the guide rail.

6. The coil billet unwinding device according to any one of claims 1 to 5, characterized in that: The rotatable installation on the tube blank guide frame includes multiple groups of limiting rotating wheels, each group of limiting rotating wheels includes two limiting rotating wheels correspondingly arranged above and below, and the limiting rotating wheels include a rotating sleeve and rotating baffles arranged on both sides of the rotating sleeve to limit the tube material between the two limiting rotating wheels, and the transmission direction of the tube material is limited by the multiple groups of limiting rotating wheels.

7. The coil billet unwinding device according to any one of claims 1 to 5, characterized in that: The fixed frame is also provided with a material discharge detection device, which includes a speed detector and a transmission wheel connected to the speed detector. The pipe material passes around the lower end of the transmission wheel from the expansion and contraction mechanism and enters the pipe blank guide frame upward.

8. Automatic unwinding device for tube material, characterized in that: It comprises the coil billet uncoiling device as claimed in any one of claims 1 to 7, wherein automatic feeding devices for conveying pipe materials to the coil billet uncoiling device are arranged on both sides of the coil billet uncoiling device.

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