A power pipe expanding machine

Abstract

The present invention relates to the field of pipe expanding equipment, specifically an electric pipe expanding machine, comprising a frame, a supporting frame fixedly installed in the middle of the frame, an expansion die head driven by a hydraulic cylinder and sliding left and right inside the supporting frame, a movable plate sliding left and right on the right side of the supporting frame, a rotating cylinder rotating inside the movable plate, a rolling mechanism for rolling and shaping the pipe fitting, and a pipe pushing mechanism for shaping by pushing the outside of the pipe fitting are provided on the rotating cylinder. The present invention adopts a rotating cylinder to drive circumferentially uniformly distributed rotating rollers to synchronously rotate and roll around the outside of the pipe fitting, continuously shaping the outer wall of the electric pipe fitting, at the same time, the linkage plate pushes the rotating rollers to press against the pipe fitting and displace in the opposite direction of the movement of the expansion die head through the hinged plate, so that the rolled pipe continuously applies reverse pulling force during rolling, effectively offsetting the axial collapse deformation of the pipe fitting caused by friction during the expanding process, thereby suppressing the generation of orange peel lines.

Description

Technical Field

[0001] The invention relates to the field of pipe expanding equipment, in particular to an electric power pipe expanding machine. Background Art

[0002] During the installation of power projects, power pipes often need to be quickly connected between pipe sections through socket connections. To ensure the firmness and sealing of the connection, the ports of the pipe sections to be connected need to be flared in advance to form a socket structure with matching dimensions. The flaring quality directly affects the pull-out strength and long-term sealing performance of the two pipes after connection.

[0003] Currently, conventional power pipe expansion equipment mainly includes a frame, an expansion die, a hydraulic drive system and a clamping assembly. During expansion, the pipe is clamped and fixed by the clamping assembly on the frame. Subsequently, the hydraulic cylinder pushes the conical or stepped expansion die along the axis of the pipe into the port. As the expansion die continues to penetrate deeper, its outer contour forces the pipe mouth to undergo plastic deformation until it expands to the preset diameter. This process relies on the strong mechanical action between the expansion die and the pipe wall to achieve expansion. It has a simple structure and a large expansion force.

[0004] However, when the above-mentioned expanding machine is inserted into the interior of the power pipe through the die head, severe sliding friction occurs between its surface and the inner wall of the power pipe, causing the pipe to undergo unexpected collapse and deformation along the direction of the die head during the expansion process. This phenomenon causes wrinkles similar to orange peel to form in local areas of the pipe wall, which not only destroys the surface finish of the pipe mouth, but also seriously weakens the effective contact area of the connection structure. The consequences include: the socket fitting surface is not tightly fitted due to unevenness, which reduces the pull-out resistance; the sealing ring on the inner wall of the power pipe cannot be evenly compressed, and leakage channels are easily formed at the lines.

[0005] Existing equipment lacks a shaping mechanism that can suppress the axial deformation of the pipe or actively repair surface defects while expanding the pipe, and technical improvements are urgently needed to improve the quality of expansion. Summary of the Invention

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a power pipe expanding machine, including a frame, a supporting frame fixedly installed in the middle of the frame, an expansion die head driven by a hydraulic cylinder is set inside the supporting frame for sliding left and right, a movable plate is set on the right side of the supporting frame for sliding left and right, a rotating cylinder is set on the inner side of the movable plate, a rolling mechanism for rolling and shaping the pipe fittings is provided on the rotating cylinder, and a pipe pushing mechanism for shaping the pipe fittings by pushing the outside of the pipe fittings.

[0007] The rolling mechanism includes a roller frame arranged on the rotating drum at equal intervals along the circumference thereof, the roller frame is slidingly connected to the rotating drum along the radial direction of the rotating drum, and a rotating roller is rotatably arranged on one side of the roller frame close to the axis of the rotating drum.

[0008] The pipe pushing mechanism includes moving blocks arranged on the rotating cylinder at equal intervals along the circumference thereof. The moving blocks are slidably connected to the rotating cylinder along a direction parallel to the tangent of the rotating cylinder. A driving assembly for driving the moving block to push the pipe is jointly provided on the moving plate and the moving block.

[0009] Preferably, a linkage plate is provided on the right side of the carrier frame for sliding left and right, a connecting ring is provided on the left side of the linkage plate for rotation, and a hinge plate is hinged between the connecting ring and each roller frame.

[0010] Preferably, a damping telescopic rod symmetrically arranged front to back is fixedly mounted on the right side of the carrier frame, the telescopic section of the damping telescopic rod is fixedly connected to the linkage plate, and an electric cylinder for driving the moving plate is fixedly mounted on the upper side of the frame.

[0011] Preferably, the rotating roller includes a shaft rotatably arranged on a roller frame, and rolling tubes arranged on the shaft at equal intervals along the left and right directions, and the rolling tubes are slidably connected to the shaft along the radial direction of the shaft.

[0012] Preferably, the outer wall of the rolling tube is provided with two anti-slip grooves which are arranged symmetrically on the left and right and are used to rub the outer wall of the power tube, and the anti-slip grooves are in an annular wave structure.

[0013] Preferably, the moving block includes a sliding plate slidably connected to the rotating cylinder, and a knocking plate slidably arranged on a side of the sliding plate close to the axis of the rotating cylinder.

[0014] Preferably, the side of the sliding plate close to the axis of the rotating cylinder is an inclined structure, and the inclined structure gradually approaches the side away from the axis of the rotating cylinder from right to left. The knocking plate slides along the inclined surface of the sliding plate, and the side of the knocking plate close to the axis of the rotating cylinder is provided with grooves at equal intervals in the left and right directions.

[0015] Preferably, the driving assembly includes an L-shaped rod fixedly mounted on a side of the sliding plate away from the axis of the rotating cylinder, and a toggle gear ring for pushing the L-shaped rod is fixedly mounted on the left side of the movable plate.

[0016] Preferably, a tension spring is provided between the sliding plate and the knocking plate, a push spring is provided between the sliding plate and the rotating cylinder, and bevel grooves are provided on the toggle gear ring at equal intervals along its circumference.

[0017] Preferably, an asynchronous motor is fixedly mounted on the left side of the movable plate, and a belt is wound around the output shaft of the asynchronous motor and the rotating drum.

[0018] The beneficial effects of the present invention are as follows: 1. The present invention adopts a rotating drum to drive the circumferentially uniformly distributed rotating rollers to rotate synchronously around the outside of the pipe fitting and roll. When the expansion die head performs the expansion operation, the outer wall of the power pipe fitting is continuously shaped. At the same time, the linkage plate pushes the rotating rollers to fit tightly against the pipe fitting through the hinged plate and move in the opposite direction of the movement of the expansion die head, so that the rolled pipe continuously applies reverse tension during rolling, effectively offsetting the axial collapse deformation of the pipe fitting caused by friction during the expansion process, thereby inhibiting the formation of orange peel texture.

[0019] 2. The present invention adopts a driving assembly to drive the moving block to slide in a direction parallel to the tangent of the pipe fitting, so that the knocking plate knocks and pushes the outer wall of the pipe fitting. The pushing direction is opposite to the rotation direction of the rotating cylinder, thereby forming a reverse complement, and then through the synergistic effect of the two, the local protrusions of the pipe fitting are dynamically corrected, the roundness of the pipe mouth and the surface flatness are significantly improved, and the comprehensiveness and uniformity of the shaping effect are enhanced.

[0020] 3. The present invention adopts multiple rolling tubes that slide radially along the shaft. The extrusion position and force can be dynamically changed during the rotation around the pipe fitting, so as to achieve variable force pushing of the power pipe fitting. Combined with the kneading effect of the annular wavy anti-slip pattern on the surface of the rolling tube, a slight reciprocating tangential friction is generated on the pipe wall during rolling, which effectively stretches micro-wrinkles and eliminates stress concentration, further eliminating surface defects.

[0021] 4. In the present invention, when the sliding plate drives the knocking plate to instantaneously knock the outer wall of the pipe fitting, the knocking plate can push the power pipe fitting in the opposite direction of the movement of the expansion die head along the inclined surface of the sliding plate, and cooperate with the rotating roller to further prevent the pipe fitting from collapsing. The grooves arranged at equal intervals on the knocking plate can intermittently push and press the outer side of the power pipe fitting, thereby smoothing the wrinkles on the outer side of the power pipe fitting. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and examples.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 It is a structural schematic diagram of the frame, fixed block, hydraulic push rod and bearing frame in the present invention.

[0025] Figure 3 It is a structural schematic diagram of the carrier frame, movable plate, rotating drum and asynchronous motor in the present invention.

[0026] Figure 4 It is a structural schematic diagram of the linkage plate, connecting ring, hinged plate and roller frame in the present invention.

[0027] Figure 5 It is a partial cross-sectional view of the movable plate, rotating drum, asynchronous motor and roller frame in the present invention.

[0028] Figure 6 It is a structural schematic diagram of the movable plate, rotating cylinder, L-shaped rod and shifting gear ring in the present invention.

[0029] Figure 7 It is a front view of the roller frame, shaft, rolling tube and anti-slip grooves in the present invention.

[0030] Figure 8 It is a partial cross-sectional view of the central shaft, rolled tube and anti-slip grooves of the present invention.

[0031] Figure 9 It is a partial cross-sectional view of the rotating cylinder, the sliding plate, the knocking plate and the L-shaped rod in the present invention.

[0032] Figure 10 It is a structural schematic diagram of the carrier frame in the present invention.

[0033] In the figure: 1. Frame; 2. Carrying frame; 3. Expanding die head; 4. Moving plate; 5. Rotating cylinder; 6. Rolling mechanism; 7. Pipe pushing mechanism; 11. Fixed block; 12. Hydraulic push rod; 41. Asynchronous motor; 61. Roller frame; 62. Rotating roller; 63. Linkage plate; 71. Moving block; 72. Driving assembly; 621. Shaft; 622. Rolling tube; 623. Anti-slip groove; 631. Connecting ring; 632. Hinge plate; 633. Damping telescopic rod; 634. Electric cylinder; 711. Sliding plate; 712. Knocking plate; 721. L-shaped rod; 722. Toggle gear ring. DETAILED DESCRIPTION

[0034] The following embodiments of the present invention are described in detail. The embodiments described below are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, the techniques or conditions described in the literature in the art or in the product specifications shall be followed.

[0035] See Figure 1 、 Figure 2 and Figure 10 A power pipe expanding machine includes a frame 1, a supporting frame 2 is fixedly installed in the middle of the frame 1, an expansion die head 3 driven by a hydraulic cylinder is set inside the supporting frame 2 for sliding left and right, a movable plate 4 is set on the right side of the supporting frame 2 for sliding left and right, a rotating cylinder 5 is set inside the movable plate 4 for rotating, and a rolling mechanism 6 for rolling and shaping the pipe fitting is set on the rotating cylinder 5, as well as a pipe pushing mechanism 7 for shaping the pipe fitting by pushing the outside of the pipe fitting.

[0036] It should be noted that if Figure 1 and Figure 2As shown, two fixed blocks 11 for clamping and fixing power pipes are provided on the right side of the frame 1 for sliding up and down. A semicircular hole groove is provided on the side of the fixed block 11 close to the axis of the expansion die head 3, and a hydraulic push rod 12 for driving the fixed block 11 is fixedly installed on the frame 1.

[0037] When it is necessary to expand the power pipe fittings, the power pipe fittings are first moved to the inside of the frame 1, and the power pipe fittings are passed through between the carrier frame 2 and the two fixed blocks 11. Then, the telescopic sections of the two hydraulic push rods 12 are extended at the same time, so that the hydraulic push rods 12 drive the two fixed blocks 11 to move and abut against each other, so that the fixed blocks 11 clamp the outer side of the power pipe fittings through the semicircular hole grooves thereon, and after clamping, the power pipe fittings are arranged coaxially with the expansion die head 3.

[0038] See Figure 1 、 Figure 3 and Figure 5 The rolling mechanism 6 includes roller frames 61 arranged on the rotating drum 5 at equal intervals along the circumference thereof. The roller frames 61 are slidingly connected to the rotating drum 5 along the radial direction of the rotating drum 5. A rotating roller 62 is rotatably arranged on one side of the roller frame 61 close to the axis of the rotating drum 5.

[0039] See Figure 1 、 Figure 3 、 Figure 4 and Figure 10 A linkage plate 63 is provided on the right side of the carrier 2 for sliding left and right, and a connecting ring 631 is provided on the left side of the linkage plate 63 for rotation. A hinged plate 632 is hinged between the connecting ring 631 and each roller frame 61. A damping telescopic rod 633 is fixedly installed on the right side of the carrier 2, which is symmetrically arranged front and back. The telescopic section of the damping telescopic rod 633 is fixedly connected to the linkage plate 63, and an electric cylinder 634 for driving the moving plate 4 is fixedly installed on the upper side of the frame 1.

[0040] After the fixed block 11 fixes and clamps the power pipe fitting, the expansion die head 3 driven by the hydraulic cylinder moves to the right, so that the expansion die head 3 extends into the interior of the power pipe fitting, thereby expanding the end of the power pipe fitting, and at the same time contracts the telescopic section of the electric cylinder 634, so that the electric cylinder 634 drives the movable plate 4 to move to the left, and the movable plate 4 drives the roller frame 61 to move synchronously through the rotating cylinder 5, and the roller frame 61 pulls the connecting ring 631 to move synchronously through the hinged plate 632.

[0041] The connecting ring 631 pulls out the telescopic section of the damping telescopic rod 633 through the linkage plate 63. Due to the slow telescopic characteristics of the telescopic section of the damping telescopic rod 633, the left movement of the linkage plate 63 lags behind the roller frame 61, thereby increasing the distance between the linkage plate 63 and the movable plate 4, and then the hinged plate 632 pulls the roller frame 61 to move toward the direction close to the axis of the rotating cylinder 5.

[0042] This enables the roller frame 61 to drive the rotating roller 62 to press against the outer surface of the power pipe fitting. As the rotating roller 62 moves to the left, the rotating roller 62 moves in the opposite direction of the movement direction of the expansion die 3 on the outside of the power pipe fitting, thereby continuously applying reverse pulling force to the power pipe fitting, effectively offsetting the axial collapse deformation of the pipe fitting caused by friction during the expansion process, thereby effectively suppressing the formation of orange peel lines.

[0043] See Figure 4 and Figure 5 An asynchronous motor 41 is fixedly installed on the left side of the movable plate 4, and a belt is wound around the output shaft of the asynchronous motor 41 and the rotating drum 5.

[0044] When the rotating roller 62 is against the power pipe fitting, the asynchronous motor 41 is started to drive the rotating drum 5 to rotate, and the rotating drum 5 drives the rotating roller 62 to rotate through the roller frame 61, so that the rotating roller 62 is in contact with the outer surface of the power pipe fitting, and the rotating roller 62 rotates around the power pipe fitting, so that the rotating roller 62 rotates and rolls the power pipe fitting, thereby continuously shaping the outer wall of the power pipe fitting.

[0045] See Figure 5 、 Figure 7 and Figure 8 The rotating roller 62 includes a shaft 621 rotatably set on the roller frame 61, and rolling tubes 622 set on the shaft 621 at equal intervals along the left and right directions. The rolling tubes 622 are slidably connected to the shaft 621 along the radial direction of the shaft 621.

[0046] When the rotating roller 62 rolls against the power pipe fitting, the roller frame 61 drives the rolling tube 622 to press against the power pipe fitting through the shaft 621. When the shaft 621 drives the rolling tube 622 to rotate until the sliding direction of the rolling tube 622 coincides with the radial direction of the rotating cylinder 5, the reaction force of the power pipe fitting on the rolling tube 622 pushes the rolling tube 622 to move away from the axis of the rotating cylinder 5, thereby weakening the pressing force of the rolling tube 622 on the power pipe fitting, and further weakening the pushing force of the rolling tube 622 on the power pipe fitting.

[0047] When the electric pipe pushes the rolling tube 622 to move, the rolling tube 622 and the shaft 621 are eccentrically arranged. When the rolling tube 622 continues to rotate, the eccentrically arranged rolling tube 622 gradually increases the abutting force on the electric pipe, thereby enhancing the pushing force of the rolling tube 622 on the electric pipe, until the sliding direction of the rolling tube 622 coincides with the radial direction of the rotating cylinder 5 again, the electric pipe pushes the rolling tube 622 again, thereby weakening the pushing force of the rolling tube 622 on the electric pipe again, realizing dynamic changes in the extrusion position and force during the rotation around the pipe, realizing variable force pushing of the electric pipe, and avoiding excessive pushing of the electric pipe.

[0048] See Figure 7 and Figure 8 The outer wall of the rolling tube 622 is provided with two anti-slip grooves 623 arranged symmetrically on the left and right and used to rub the outer wall of the power tube. The anti-slip grooves 623 are in a circular wave structure.

[0049] When the rolling tube 622 is squeezed and rolled on the outer surface of the power pipe fitting, the rolling tube 622 pushes the outer surface of the power pipe fitting axially through the annular wavy anti-slip groove 623 on its surface, and the symmetrically arranged anti-slip grooves 623 can push the outer surface of the power pipe fitting in opposite directions, thereby kneading the outer surface of the power pipe fitting, effectively stretching the micro-wrinkles on the outer surface of the power pipe fitting and eliminating stress concentration, further eliminating surface defects.

[0050] See Figure 1 、 Figure 4 、 Figure 5 and Figure 6 The pipe pushing mechanism 7 includes moving blocks 71 arranged on the rotating cylinder 5 at equal intervals along the circumference thereof. The moving blocks 71 are slidably connected to the rotating cylinder 5 in a direction parallel to the tangent of the rotating cylinder 5. The moving plate 4 and the moving block 71 are jointly provided with a driving component 72 for driving the moving block 71 to push the pipe.

[0051] See Figure 5 、 Figure 6 and Figure 9 The moving block 71 includes a sliding plate 711 slidably connected to the rotating cylinder 5 , and a knocking plate 712 slidably arranged on a side of the sliding plate 711 close to the axis of the rotating cylinder 5 .

[0052] See Figure 4 、 Figure 6 and Figure 9 The driving assembly 72 includes an L-shaped rod 721 fixedly mounted on the side of the sliding plate 711 away from the axis of the rotating cylinder 5. A toggle gear ring 722 for pushing the L-shaped rod 721 is fixedly mounted on the left side of the movable plate 4. A tension spring is provided between the sliding plate 711 and the knocking plate 712, and a push spring is provided between the sliding plate 711 and the rotating cylinder 5. The toggle gear ring 722 is provided with inclined grooves at equal intervals along its circumference.

[0053] When the rotating cylinder 5 starts to rotate, the rotating cylinder 5 drives the sliding plate 711 to rotate synchronously, so that the sliding plate 711 drives the L-shaped rod 721 to rotate synchronously. When the transverse section of the L-shaped rod 721 rotates to the position of the inclined groove of the toggle gear ring 722, the transverse section of the L-shaped rod 721 moves along the hypotenuse of the inclined groove in the direction away from the axis of the rotating cylinder 5, and at the same time compresses the push spring.

[0054] When the L-shaped rod 721 rotates to the position of the bevel groove again, the bevel groove no longer blocks the L-shaped rod 721, so that the push spring quickly pushes the sliding plate 711 toward the direction close to the axis of the rotating cylinder 5 through its own elastic force, and the sliding plate 711 drives the knocking plate 712 to knock on the outer surface of the power pipe fitting, and then dynamically corrects the local bulge of the pipe fitting through the coordinated action of the knocking plate 712 and the rolling tube 622, thereby preventing the rolling tube 622 from excessively pushing the power pipe fitting, causing the power pipe fitting to be twisted, and enhancing the comprehensiveness and uniformity of the shaping effect.

[0055] See Figure 9 The side of the sliding plate 711 close to the axis of the rotating cylinder 5 is an inclined structure, and the inclined structure gradually approaches the side away from the axis of the rotating cylinder 5 from right to left. The knocking plate 712 slides along the inclined surface of the sliding plate 711, and the side of the knocking plate 712 close to the axis of the rotating cylinder 5 is provided with grooves at equal intervals in the left and right directions.

[0056] In the initial state, the tension spring pulls the sliding plate 711 and the knocking plate 712 by its own elastic force. When the sliding plate 711 pushes the knocking plate 712 to knock on the electronic tube fitting, the knocking plate 712 is blocked by the electronic tube fitting and stops. The sliding plate 711 continues to push the knocking plate 712 under the action of its own inertia, so that the knocking plate 712 slides along the inclined surface of the sliding plate 711, and then the knocking plate 712 pushes the electric tube fitting in the opposite direction of the movement of the expansion die 3, and cooperates with the rotating roller 62 to further prevent the tube fitting from collapsing. The grooves arranged at equal intervals on the knocking plate 712 can intermittently push and press the protruding wrinkles on the outside of the electric tube fitting, thereby smoothing the wrinkles on the outside of the electric tube fitting, further enhancing the shaping effect.

[0057] See Figures 1 to 10 When expanding the power pipe fittings, the present invention also includes the following steps: the first step is to move the power pipe fittings to the inside of the frame 1, and use the hydraulic push rod 12 to drive the two fixed blocks 11 to clamp the outside of the power pipe fittings, so that the power pipe fittings and the expansion die head 3 are arranged coaxially.

[0058] In the second step, the expansion die head 3 driven by the hydraulic cylinder moves to the right, so that the expansion die head 3 extends into the interior of the power pipe fitting, thereby expanding the end of the power pipe fitting. The electric cylinder 634 drives the movable plate 4 to move to the left, so that the hinged plate 632 pulls the roller frame 61 to move toward the direction close to the axis of the rotating cylinder 5.

[0059] In the third step, the roller frame 61 drives the rotating roller 62 to press against the outer surface of the power pipe fitting. As the rotating roller 62 moves to the left, the rotating roller 62 moves in the opposite direction of the movement direction of the expansion die 3 toward the outer side of the power pipe fitting, thereby continuously applying reverse pulling force to the power pipe fitting, effectively offsetting the axial collapse deformation of the pipe fitting caused by friction during the expansion process.

[0060] In the fourth step, the asynchronous motor 41 is started to drive the rotating drum 5 to rotate, so that the rotating roller 62 is attached to the outer surface of the power pipe fitting, and the rotating roller 62 rotates around the power pipe fitting, so that the rotating roller 62 rotates and rolls the power pipe fitting, thereby continuously shaping the outer wall of the power pipe fitting.

[0061] In the fifth step, the sliding rolling tube 622 dynamically changes the extrusion position and force during the rotation around the electronic tube, thereby achieving variable force pushing of the power tube, and rubbing the outer side of the power tube through the symmetrically arranged anti-slip grooves 623, effectively stretching the micro-wrinkles on the outer surface of the power tube and eliminating stress concentration, further eliminating surface defects.

[0062] In the sixth step, the rotating cylinder 5 drives the sliding plate 711 to rotate synchronously, so that the sliding plate 711 intermittently drives the knocking plate 712 to knock on the outer surface of the power pipe fitting, and cooperates with the rotating roller 62 to dynamically correct the protrusion of the pipe fitting to prevent the rolling tube 622 from excessively pushing the power pipe fitting, causing the power pipe fitting to be twisted.

[0063] In the seventh step, the knocking plate 712 slides along the inclined surface of the sliding plate 711 to knock on the electronic tube fittings, so that the knocking plate 712 pushes the electric tube fittings in the opposite direction of the movement of the expansion die 3, and cooperates with the rotating roller 62 to further prevent the tube fittings from collapsing. The grooves arranged at equal intervals on the knocking plate 712 can intermittently push and press the protruding wrinkles on the outside of the electric tube fittings, thereby smoothing the wrinkles on the outside of the electric tube fittings.

[0064] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention, which are still covered by the scope of protection of the present invention.

Claims

1. A pipe expander for electric power pipes, comprising a frame, a carrier frame fixedly mounted in the middle of the frame, an expansion die head driven by a hydraulic cylinder and sliding left and right inside the carrier frame, characterized in that: A movable plate is provided on the right side of the carrier frame for sliding left and right, a rotating cylinder is provided on the inner side of the movable plate for rotating, and a rolling mechanism for rolling and shaping the pipe fittings is provided on the rotating cylinder, as well as a pipe pushing mechanism for shaping the pipe fittings by pushing the outer side thereof; The rolling mechanism includes roller frames arranged on the rotating drum at equal intervals along the circumference thereof, the roller frames being slidably connected to the rotating drum along the radial direction of the rotating drum, and a rotating roller being rotatably arranged on one side of the roller frame close to the axis of the rotating drum; The pipe pushing mechanism includes moving blocks arranged on the rotating cylinder at equal intervals along the circumference thereof, the moving blocks being slidably connected to the rotating cylinder in a direction parallel to the tangent of the rotating cylinder, and a driving assembly for driving the moving blocks to push the pipe fittings being provided on both the moving plate and the moving blocks; The right side of the carrier is provided with a linkage plate for sliding left and right, and the left side of the linkage plate is provided with a connecting ring for rotating, and a hinged plate is hinged between the connecting ring and each roller frame; A damping telescopic rod symmetrically arranged front and back is fixedly installed on the right side of the carrier frame, the telescopic section of the damping telescopic rod is fixedly connected to the linkage plate, and an electric cylinder for driving the moving plate is fixedly installed on the upper side of the frame; The rotating roller includes a shaft rotatably mounted on a roller frame, and rolling tubes equidistantly mounted on the shaft in the left-right direction, the rolling tubes being slidably connected to the shaft along the radial direction of the shaft; The moving block comprises a sliding plate slidably connected to the rotating cylinder, and a knocking plate slidably arranged on a side of the sliding plate close to the axis of the rotating cylinder.

2. The power pipe expanding machine according to claim 1, characterized in that: The outer wall of the rolling tube is provided with two anti-slip grooves which are arranged symmetrically on the left and right and are used to rub the outer wall of the power tube. The anti-slip grooves are in an annular wave structure.

3. The power pipe expanding machine according to claim 1, characterized in that: The side of the sliding plate close to the axis of the rotating cylinder is an inclined structure, and the inclined structure gradually approaches the side away from the axis of the rotating cylinder from right to left. The knocking plate slides along the inclined surface of the sliding plate, and the side of the knocking plate close to the axis of the rotating cylinder is provided with grooves at equal intervals in the left and right directions.

4. The electric power pipe expanding machine according to claim 1, characterized in that: The driving assembly includes an L-shaped rod fixedly mounted on the side of the sliding plate away from the axis of the rotating cylinder, and a toggle gear ring for pushing the L-shaped rod is fixedly mounted on the left side of the moving plate.

5. The electric power pipe expanding machine according to claim 4, characterized in that: A tension spring is provided between the sliding plate and the knocking plate, a push spring is provided between the sliding plate and the rotating cylinder, and inclined grooves are provided on the tossing gear ring at equal intervals along its circumference.

6. The electric power pipe expanding machine according to claim 1, characterized in that: An asynchronous motor is fixedly installed on the left side of the movable plate, and a belt is wound around the output shaft of the asynchronous motor and the rotating cylinder.

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