Fixed-length cutting device and method for MPP pipe

Abstract

The invention relates to the field of MPP pipe machining equipment, in particular to a fixed-length cutting device and method.The fixed-length cutting device comprises a base, a mounting plate is fixedly arranged at the upper end of the base, the fixed-length cutting device further comprises a rotating plate, one end of the rotating plate is fixedly connected with an annular frame through a sliding rod, the annular frame is rotatably mounted on the side wall of the mounting plate, and a cutting frame is slidably mounted on the sliding rod; a moving motor is fixedly arranged on the side wall of the rotating plate, the output end of the moving motor is connected with a screw, the screw penetrates through the cutting frame in a threaded mode, cutting assemblies are oppositely arranged at the upper end and the lower end of the side wall of the cutting frame, spinning assemblies are oppositely arranged at the left end and the right end of the side wall of the cutting frame, and a radial driving structure is arranged on the cutting frame. The pipe is rotationally cut through the cutting assembly, and meanwhile, the spinning assembly rotates around the pipe in the cutting process and always extrudes the two sides of the pipe, so that the pipe can be rectified and positioned in the cutting process, and deformation of the pipe due to cutting acting force is avoided.

Description

Technical Field

[0001] This invention relates to the field of MPP pipe processing equipment technology, and in particular to a fixed-length cutting device and method for MPP pipes. Background Technology

[0002] MPP power conduit, also known as MPP power cable protection conduit, is a piping system used for the protection and laying of power cables. MPP power conduit is mainly made of modified polypropylene, a specially treated polypropylene material with a variety of excellent properties, giving MPP power conduit good insulation performance. It is suitable for the protection and laying of power cables and can maintain stable performance in high-temperature environments, ensuring the safe use of power cables.

[0003] Currently, two main cutting tools are used for cutting MPP power pipes: hand saws and hand-operated cutting machines. While hand saws are simple to operate and inexpensive, they are inefficient for large-sized power pipes, labor-intensive, and it's difficult to guarantee the flatness and precision of the cut surface. Hand-operated cutting machines, while highly flexible, are prone to pipe deformation during cutting, and the blades can overheat and attract molten adhesive, making it difficult to guarantee cutting stability. Summary of the Invention

[0004] The purpose of this invention is to provide a fixed-length cutting device and method for MPP pipes, aiming to solve the above-mentioned technical problems.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A fixed-length cutting device for MPP pipe includes a base, an mounting plate fixedly mounted on the upper end of the base, and a rotating plate. One end of the rotating plate is fixedly connected to a ring frame via a slide rod. The ring frame is rotatably mounted on the side wall of the mounting plate. A cutting frame is slidably mounted on the slide rod. A moving motor is fixedly mounted on the side wall of the rotating plate. A screw is connected to the output end of the moving motor. The screw thread passes through the cutting frame. Cutting components are arranged opposite each other at the upper and lower ends of the side wall of the cutting frame. Spinning components are arranged opposite each other at the left and right ends of the side wall of the cutting frame. A radial drive structure is provided on the cutting frame. The radial drive structure drives the cutting components and the spinning components to synchronously approach the pipe radially.

[0007] The cutting assembly includes a fixed frame, within which a cutting wheel is rotatably mounted. A cutting motor is fixedly mounted on one side of the fixed frame, with its output end connected to the cutting wheel. A cavity is fixedly mounted on one side of the fixed frame, with a shaft coaxially extending through the cavity. A piston is fixedly mounted at the bottom of the shaft and is slidably fitted within the cavity. An extension housing is provided on one side of the cavity, with a toothed gear rotatably mounted on the extension housing via a synchronous shaft. A toothed plate is provided on one side of the shaft, meshing with the toothed gear. The output shaft of the cutting motor is connected to the synchronous shaft via a synchronous belt. A liquid storage tank is fixedly mounted on the cutting frame, and the bottom of one side of the cavity is connected to the liquid storage tank via a liquid inlet pipe.

[0008] As a further embodiment of the present invention: a nozzle is provided at the bottom of the cavity, a one-way valve is provided on the liquid inlet pipe, a top plate is fixedly provided at the top of the shaft, and a reset spring is provided between the bottom of the top plate and the top of the cavity.

[0009] As a further aspect of the present invention: the spinning assembly includes a sleeve, a movable block is slidably installed inside the sleeve, an arc-shaped pressure block is fixedly connected to one end of the movable block, a ball bearing is rolledly installed on the inner arc wall of the arc-shaped pressure block, a displacement sensor is fixedly installed at the other end of the movable block, a push spring is provided between the end of the movable block and the sleeve, limit rods are fixedly provided on both sides of the movable block, and limit grooves are provided through both sides of the sleeve, with the limit rods adapted to be slidably installed in the limit grooves.

[0010] As a further embodiment of the present invention: the radial drive structure includes a slide block and a gear disk, a radial groove is provided on the side wall of the cutting frame, the slide block is slidably installed in the groove, the fixed frame and the sleeve are respectively fixedly connected to the corresponding slide block, a rotating groove is provided on the side wall of the cutting frame, the gear disk is rotatably installed in the rotating groove, a servo motor is fixedly provided on the side wall of the cutting frame, and a mating gear is connected to the output end of the servo motor, the mating gear meshing with the gear disk.

[0011] As a further aspect of the present invention: a drive groove is uniformly provided through the gear plate, a pin is fixedly provided on the slide block, the pin is adapted to slide in the corresponding drive groove, and a return spring is provided between the end of the slide block and the slide groove.

[0012] As a further embodiment of the present invention: a positioning baffle is fixedly provided in the center of the rotating plate, a central column extends from the center of the positioning baffle, the central column is coaxially inserted into the inside of the pipe, a receiving groove is uniformly provided on the circumferential wall of the central column, a positioning block is provided in the receiving groove, a sliding groove is uniformly provided on the rotating plate, a sliding block is slidably installed in the sliding groove, a compression spring is provided between the top of the sliding block and the sliding groove, the sliding block and the corresponding positioning block are integrally connected to form an L-shape, a positioning roller is rotatably installed on the surface of the positioning block, and the positioning roller rolls against the inner wall of the pipe.

[0013] As a further embodiment of the present invention: a sliding sleeve is provided on one side of the mounting plate, through which the pipe passes coaxially; a support plate extends from the bottom of the sliding sleeve; a telescopic cylinder is fixedly provided at the upper end of the base; the output section of the telescopic cylinder is fixedly connected to the support plate; several drive wheels are evenly rotatably mounted on the sliding sleeve; the drive wheels are in contact with the surface of the pipe and are driven to rotate by a drive motor; several connecting rods are rotatably mounted on the sliding sleeve; the other end of the connecting rod is rotatably engaged with the slider; a slide rail is provided on the side wall of the mounting plate; the slider is adapted to slide and is slidably mounted in the corresponding slide rail; a compression spring is provided between the end of the slider and the slide rail; a connecting rod extends from the bottom of the slider; and a clamping block is fixedly provided at the bottom of the connecting rod.

[0014] As a further embodiment of the present invention: a rotating frame is fixedly provided on the upper end of the base, a rotating shaft extends from the center of the rotating plate, the rotating shaft rotates through the rotating frame, a rotary motor is fixedly provided on the side wall of the rotating frame, and the output end of the rotary motor is connected to the rotating shaft through a transmission belt.

[0015] As a further aspect of the present invention: an annular groove is provided on the side wall of the mounting plate, and the ring frame is rotatably mounted in the annular groove.

[0016] The present invention also provides a method for cutting MPP pipes to a fixed length, using the above-mentioned MPP pipe cutting device, comprising the following steps:

[0017] Step 1: Determine the distance, drive the screw to rotate by moving the motor, and the screw will drive the cutting frame to slide along the slide bar until it moves to the designated position and stays still.

[0018] Step 2: Spin cutting. The radial drive structure drives the cutting component and the spinning component to move radially closer to the pipe at the same time. While cutting, the cutting component squeezes and positions the pipe through the spinning component, thereby achieving continuous fixed-length cutting of the pipe.

[0019] The beneficial effects of this invention are:

[0020] (1) By setting up a ring frame, the pipe passes through the mounting plate and the cutting frame during cutting. At the same time, the moving motor drives the screw to rotate, and the screw will drive the cutting frame to slide along the slide bar until the cutting frame moves to the designated position, so that the length of the cut pipe meets the preset requirements, and realizes continuous fixed-length cutting of the pipe.

[0021] (2) The radial drive structure drives the cutting assembly and the spinning assembly to move radially in sync. At the same time, the rotating plate will drive the cutting frame to rotate axially. The cutting assembly is used to perform rotary cutting on the pipe. Meanwhile, the spinning assembly rotates around the pipe during the cutting process and always keeps the pipe on both sides, so that the pipe can be corrected and positioned during the cutting process, avoiding deformation of the pipe due to the cutting force, which is conducive to improving the cutting quality.

[0022] (3) By setting up the cutting assembly, the cutting motor will drive the toothed gear to rotate continuously through the synchronous belt. The toothed gear will drive the shaft and piston to slide up and down in the cavity. When the piston moves upward, a negative pressure is generated in the cavity, so that coolant is drawn from the storage tank through the liquid inlet pipe. When the piston moves downward, the coolant in the cavity will be automatically sprayed out, so that the cutting wheel can be periodically sprayed with liquid to cool it, avoiding the problem of melted glue adhering at the cutting position due to overheating of the cutting wheel due to friction. The cutting process and the cooling process are coordinated and linked, and automatic liquid spraying and cooling are achieved at the same time as cutting, which greatly improves the quality of pipe cutting.

[0023] (4) By setting a positioning baffle, during the rotary cutting process, the rotating plate will drive the positioning baffle to rotate synchronously. The sliding block will gradually slide outward along the sliding groove under the action of centrifugal force and compress the squeezing spring until the positioning roller on the positioning block abuts against the inner wall of the pipe. At this time, the positioning roller will roll along the inner wall of the pipe and apply an outward squeezing action to the inner wall of the pipe. Thus, the pipe can be supported and positioned during rotation, so that the pipe can maintain good stability and coaxiality under the limiting support action, which is beneficial to the cutting process. Attached Figure Description

[0024] The invention will now be further described with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 This is a schematic diagram of the full cross-section structure of the present invention.

[0027] Figure 3 This is a schematic diagram of the sliding sleeve in this invention.

[0028] Figure 4 This is a schematic diagram of the transfer plate in this invention.

[0029] Figure 5This is a schematic diagram of the positioning baffle in this invention.

[0030] Figure 6 This is a front structural diagram of the cutting frame in this invention.

[0031] Figure 7 This is a schematic diagram of the back structure of the cutting frame in this invention.

[0032] Figure 8 This is an exploded view of the cutting frame structure in this invention.

[0033] Figure 9 This is a schematic diagram of the cutting component in this invention.

[0034] Figure 10 yes Figure 9 A magnified schematic diagram of the structure at point A in the middle.

[0035] Figure 11 This is a schematic diagram of the shaft structure in this invention.

[0036] Figure 12 This is a schematic diagram of the spinning assembly in this invention.

[0037] In the picture:

[0038] 1. Base; 11. Telescopic cylinder; 12. Rotary motor; 13. Rotating frame; 14. Transmission belt;

[0039] 2. Mounting plate; 21. Slide rail; 22. Circular groove;

[0040] 3. Sliding sleeve; 31. Drive wheel; 32. Drive motor; 33. Connecting rod; 34. Slider; 35. Connecting rod; 36. Clamping block; 37. Compression spring; 38. Support plate;

[0041] 4. Rotating plate; 41. Rotating shaft; 42. Slide rod; 43. Ring frame; 44. Screw; 45. Moving motor;

[0042] 5. Cutting frame; 51. Slide groove; 52. Slide block; 521. Pin; 522. Return spring; 53. Servo motor; 531. Matching gear; 54. Liquid storage tank; 55. Gear plate; 551. Drive slant groove; 56. Rotary groove;

[0043] 6. Positioning baffle; 61. Central column; 611. Receiving groove; 62. Sliding groove; 63. Sliding block; 64. Positioning block; 65. Compression spring; 66. Positioning roller;

[0044] 7. Cutting assembly; 71. Fixing frame; 711. Cutting motor; 712. Synchronous belt; 72. Cutting wheel; 73. Cavity; 731. Nozzle; 732. Extension housing; 733. Gear with missing teeth; 734. Synchronous shaft; 74. Shaft; 741. Piston; 742. Gear plate; 743. Top plate; 744. Return spring; 75. Inlet pipe; 751. Check valve;

[0045] 8. Spinning assembly; 81. Sleeve; 811. Limiting groove; 82. Movable block; 821. Limiting rod; 822. Displacement sensor; 823. Push spring; 83. Arc-shaped pressure block; 831. Ball bearing. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Please see Figure 1 , Figure 2 , Figure 4 and Figure 7 As shown, the present invention is a fixed-length cutting device for MPP pipes, including a base 1, an mounting plate 2 fixedly mounted on the upper end of the base 1, and a rotating plate 4. One end of the rotating plate 4 is fixedly connected to a ring frame 43 via a slide rod 42. The ring frame 43 is rotatably mounted on the side wall of the mounting plate 2. A cutting frame 5 is slidably mounted on the slide rod 42. A moving motor 45 is fixedly mounted on the side wall of the rotating plate 4. A screw 44 is connected to the output end of the moving motor 45. The screw 44 is threaded through the cutting frame 5. Cutting components 7 are arranged opposite each other at the upper and lower ends of the side wall of the cutting frame 5. Spinning components 8 are arranged opposite each other at the left and right ends of the side wall of the cutting frame 5. A radial drive structure is provided on the cutting frame 5. The radial drive structure drives the cutting components 7 and the spinning components 8 to synchronously approach the pipe radially.

[0048] Specifically, by setting the ring frame 43, during cutting, the pipe passes through the mounting plate 2 and the cutting frame 5. At the same time, the moving motor 45 drives the screw 44 to rotate, and the screw 44 will drive the cutting frame 5 to slide along the slide bar 42 until the cutting frame 5 moves to the designated position, so that the length of the cut pipe meets the preset requirements. During the cutting process, the radial drive structure drives the cutting assembly 7 and the spinning assembly 8 to move radially synchronously. At the same time, the rotating plate 4 will drive the cutting frame 5 to rotate axially. The cutting assembly 7 is used to perform rotational cutting on the pipe. Meanwhile, the spinning assembly 8 rotates around the pipe during the cutting process and always keeps the pipe squeezed on both sides. This can correct and position the pipe during the cutting process, avoid the pipe from deforming due to the cutting force, and help improve the cutting quality.

[0049] like Figures 9-11 As shown, the cutting assembly 7 includes a fixed frame 71, in which a cutting wheel 72 is rotatably mounted. A cutting motor 711 is fixedly mounted on one side of the fixed frame 71, and the output end of the cutting motor 711 is connected to the cutting wheel 72. A cavity 73 is fixedly mounted on one side of the fixed frame 71, and a shaft 74 is coaxially inserted through the cavity 73. A piston 741 is fixedly mounted at the bottom of the shaft 74 and is adapted to slide inside the cavity 73. An extension housing 732 is provided on one side of the cavity 73, and a toothed gear 733 is rotatably mounted on the extension housing 732 via a synchronous shaft 734. A toothed plate 742 is provided on one side of the shaft 74, and the toothed gear 733 meshes with the toothed plate 742. The output shaft of the cutting motor 711 is connected to the synchronous shaft 734 via a synchronous belt 712. A liquid storage tank 54 is fixedly mounted on the cutting frame 5, and the bottom of one side of the cavity 73 is connected to the liquid storage tank 54 via a liquid inlet pipe 75.

[0050] Specifically, by setting up the cutting assembly 7, the cutting motor 711 drives the cutting wheel 72 to rotate continuously for cutting. During this process, the cutting motor 711 drives the toothed gear 733 to rotate continuously via the synchronous belt 712. The toothed gear 733 drives the shaft 74 and the piston 741 to slide up and down in the cavity 73. When the piston 741 moves upward, a negative pressure is generated in the cavity 73, thereby drawing coolant from the storage tank 54 through the liquid inlet pipe 75. When the piston 741 moves downward, the coolant in the cavity 73 will be automatically sprayed out, thereby enabling a periodic liquid spraying cooling process for the cutting wheel 72. This avoids the problem of melted adhesive adhering at the cutting position due to overheating caused by friction. The cutting process and the cooling process are linked together, and automatic liquid spraying cooling is achieved during cutting, which greatly improves the quality of pipe cutting.

[0051] like Figures 9-11 As shown, a nozzle 731 is provided at the bottom of the cavity 73, a one-way valve 751 is provided on the liquid inlet pipe 75, a top plate 743 is fixedly provided at the top of the shaft 74, and a return spring 744 is provided between the bottom of the top plate 743 and the top of the cavity 73.

[0052] Specifically, nozzle 731 and one-way valve 751 ensure that after the coolant enters the cavity 73 from the inlet pipe 75, it can only be sprayed out from nozzle 731, preventing backflow in the inlet pipe 75 when the coolant is squeezed. Top plate 743 and return spring 744 enable the shaft 74 to automatically return to its original position after it is raised, allowing the coolant to be smoothly squeezed out.

[0053] like Figure 7 and Figure 12As shown, the spinning assembly 8 includes a sleeve 81, a movable block 82 is slidably installed inside the sleeve 81, an arc-shaped pressure block 83 is fixedly connected to one end of the movable block 82, a ball bearing 831 is rolled on the inner arc wall of the arc-shaped pressure block 83, a displacement sensor 822 is fixedly installed at the other end of the movable block 82, a push spring 823 is provided between the end of the movable block 82 and the sleeve 81, limit rods 821 are fixedly provided on both sides of the movable block 82, and limit grooves 811 are provided through both sides of the sleeve 81, with the limit rods 821 adapted to slide within the limit grooves 811.

[0054] Specifically, by setting up the spinning assembly 8, when the upper and lower cutting assemblies 7 are rotating and cutting the pipe, the arc-shaped pressure block 83 will also press against the left and right sides of the pipe to prevent the pipe from expanding and deforming to both sides during the cutting process. At the same time, the arc-shaped pressure block 83 rotates synchronously along the pipe through the ball bearings 831, thus maintaining the positioning and squeezing effect on the pipe. During the squeezing process, due to the sliding cooperation between the limiting rod 821 and the limiting groove 811, the movable block 82 has a certain amount of movement space within the sleeve 81. When the pipe is squeezed and the arc-shaped pressure block 83 moves, the displacement sensor 822 can monitor the displacement distance of the movable block 82 in real time. The displacement distance can be used to feedback the degree of deformation during the pipe cutting process, thereby enabling real-time detection of the pipe cutting process and better control of the cutting quality.

[0055] like Figures 6-8 As shown, the radial drive structure includes a slide block 52 and a gear disk 55. A radial groove 51 is provided on the side wall of the cutting frame 5. The slide block 52 is slidably installed in the groove 51. The fixed frame 71 and the sleeve 81 are respectively fixedly connected to the corresponding slide block 52. A rotating groove 56 is provided on the side wall of the cutting frame 5. The gear disk 55 is rotatably installed in the rotating groove 56. A servo motor 53 is fixedly installed on the side wall of the cutting frame 5. The output end of the servo motor 53 is connected to a mating gear 531, which meshes with the gear disk 55.

[0056] Furthermore, a drive groove 551 is evenly provided through the gear plate 55, and a pin 521 is fixedly provided on the slide block 52. The pin 521 is adapted to slide and install in the corresponding drive groove 551, and a return spring 522 is provided between the end of the slide block 52 and the slide groove 51.

[0057] Specifically, by setting a radial drive structure, when the servo motor 53 starts, it will drive the mating gear 531 to rotate. The mating gear 531 will drive the gear disk 55 to rotate in the rotating groove 56. With the cooperation of the pin 521 and the drive inclined groove 551, the gear disk 55 will drive the slide block 52 to move radially along the slide groove 51 when it rotates, so that the corresponding cutting component 7 and spinning component 8 will move closer to or further away from the pipe at the same time, which is conducive to the smooth progress of the spinning cutting process.

[0058] like Figure 4 and Figure 5 As shown, a positioning baffle 6 is fixedly installed in the center of the rotating plate 4, and a central column 61 extends from the center of the positioning baffle 6. The central column 61 is coaxially inserted into the inside of the pipe. Receiving grooves 611 are evenly arranged on the circumferential wall of the central column 61. Positioning blocks 64 are installed in the receiving grooves 611. Sliding grooves 62 are evenly arranged on the rotating plate 4. Sliding blocks 63 are slidably installed in the sliding grooves 62. A compression spring 65 is provided between the top of the sliding block 63 and the sliding groove 62. The sliding block 63 and the corresponding positioning block 64 are integrally connected to form an L-shape. Positioning rollers 66 are rotatably installed on the surface of the positioning block 64. The positioning rollers 66 roll against the inner wall of the pipe.

[0059] Specifically, by setting the positioning baffle 6, during the rotary cutting process, the rotating plate 4 will drive the positioning baffle 6 to rotate synchronously. The sliding block 63 will gradually slide outward along the sliding groove 62 under the action of centrifugal force and compress the spring 65 until the positioning roller 66 on the positioning block 64 abuts against the inner wall of the pipe. At this time, the positioning roller 66 will roll along the inner wall of the pipe and apply an outward squeezing action to the inner wall of the pipe, so that the pipe can be supported and positioned during rotation, so that the pipe can maintain good stability and coaxiality under the limiting support, which is beneficial to the cutting process.

[0060] like Figure 2 and Figure 3 As shown, a sliding sleeve 3 is provided on one side of the mounting plate 2, and the pipe passes through the sliding sleeve 3 coaxially. A support plate 38 extends from the bottom of the sliding sleeve 3. A telescopic cylinder 11 is fixedly installed on the upper end of the base 1. The output section of the telescopic cylinder 11 is fixedly connected to the support plate 38. Several drive wheels 31 are evenly rotatably installed on the sliding sleeve 3. The drive wheels 31 are in contact with the surface of the pipe and are driven to rotate by the drive motor 32. Several connecting rods 33 are rotatably installed on the sliding sleeve 3. The other end of the connecting rod 33 is rotatably engaged with the slider 34. A slide rail 21 is provided on the side wall of the mounting plate 2. The slider 34 is adapted to slide and is slidably installed in the corresponding slide rail 21. A compression spring 37 is provided between the end of the slider 34 and the slide rail 21. A connecting rod 35 extends from the bottom of the slider 34. A clamping block 36 is fixedly installed at the bottom of the connecting rod 35.

[0061] Specifically, by setting up a sliding sleeve 3, the pipe passes coaxially through the sliding sleeve 3. When the drive motor 32 drives the drive wheel 31 to rotate, the drive wheel 31 will drive the pipe forward, thereby enabling continuous fixed-length cutting of the pipe. At the same time, when the telescopic cylinder 11 drives the sliding sleeve 3 to move outward along the axial direction, the sliding sleeve 3 will drive the slider 34 to slide along the slide rail 21 through the connecting rod 33 until the clamping block 36 abuts against the surface of the pipe, thereby realizing the positioning and clamping process of the pipe, so that the pipe remains fixed during the cutting process.

[0062] like Figure 1As shown, a rotating frame 13 is fixedly installed on the upper end of the base 1, and a rotating shaft 41 extends from the center of the rotating plate 4. The rotating shaft 41 rotates through the rotating frame 13. A rotary motor 12 is fixedly installed on the side wall of the rotating frame 13. The output end of the rotary motor 12 is connected to the rotating shaft 41 through a transmission belt 14.

[0063] Specifically, when the rotary motor 12 is started, it will drive the rotating shaft 41 to rotate via the transmission belt 14. The rotating shaft 41 will drive the rotating plate 4 to rotate, and the rotating plate 4 will drive the cutting frame 5 to rotate axially as a whole, so as to smoothly realize the rotary cutting process.

[0064] like Figure 1 and Figure 2 As shown, an annular groove 22 is provided on the side wall of the mounting plate 2, and the ring frame 43 is rotatably installed in the annular groove 22.

[0065] Specifically, the rotational engagement between the ring frame 43 and the ring groove 22 provides stable support for the rotating plate 4 and the ring frame 43 during rotation, which helps to improve the stability of the cutting frame 5 during rotation and movement.

[0066] The working principle of the above device is as follows: Figures 1-12 As shown, during use, the pipe passes through the mounting plate 2 and the cutting frame 5. When the drive motor 32 drives the drive wheel 31 to rotate, the drive wheel 31 will carry the pipe forward until the end of the pipe rests against the positioning baffle 6. At the same time, the telescopic cylinder 11 drives the sliding sleeve 3 to move outward along the axial direction. The sliding sleeve 3 will drive the slider 34 to slide along the slide rail 21 through the connecting rod 33 until the clamping block 36 abuts against the surface of the pipe, thereby realizing the positioning and clamping process of the pipe. The moving motor 45 drives the screw 44 to rotate. The screw 44 will drive the cutting frame 5 to slide along the slide rod 42 until the cutting frame 5 moves to the designated position, so that the length of the cut pipe meets the preset requirements. The rotary motor 12 starts and drives the rotating shaft 41 to rotate through the transmission belt 14. The rotating shaft 41 will drive the rotating plate 4 to rotate. The rotating plate 4 will drive the cutting frame 5 to rotate axially to smoothly realize the rotary cutting process. When the upper and lower cutting components 7 rotate to cut the pipe, the arc-shaped pressure block 83 will also press against the left and right sides of the pipe to prevent the pipe from expanding and deforming to the sides during the cutting process. At the same time, the arc-shaped pressure block 83 rotates synchronously along the pipe through the ball bearings 831, thus maintaining the positioning and squeezing effect on the pipe. During the cutting process, the cutting motor 711 will drive the toothed gear 733 to rotate continuously through the synchronous belt 712. The toothed gear 733 will drive the shaft 74 and the piston 741 to slide up and down in the cavity 73. When the piston 741 moves upward, a negative pressure is generated in the cavity 73, thereby drawing coolant from the liquid storage tank 54 through the liquid inlet pipe 75. When the piston 741 moves downward, the coolant in the cavity 73 will be automatically sprayed out, thus enabling a periodic liquid spraying cooling process for the cutting wheel 72.

[0067] The present invention also provides a method for cutting MPP pipes to a fixed length, using the above-mentioned MPP pipe cutting device, comprising the following steps:

[0068] Step 1: Determine the distance, drive the screw 44 to rotate by moving the motor 45, and the screw 44 will drive the cutting frame 5 to slide along the slide bar 42 until it moves to the designated position and stays still.

[0069] Step 2: Spin cutting. The radial drive structure drives the cutting component 7 and the spinning component 8 to move radially closer to the pipe simultaneously. While cutting, the cutting component 7 squeezes and positions the pipe through the spinning component 8, thereby achieving continuous fixed-length cutting of the pipe.

[0070] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A fixed-length cutting device for MPP pipes, comprising a base (1), wherein a mounting plate (2) is fixedly disposed on the upper end of the base (1), characterized in that, It also includes a rotating plate (4), one end of which is fixedly connected to a ring frame (43) via a slide rod (42). The ring frame (43) is rotatably mounted on the side wall of the mounting plate (2). A cutting frame (5) is slidably mounted on the slide rod (42). A moving motor (45) is fixedly mounted on the side wall of the rotating plate (4). A screw (44) is connected to the output end of the moving motor (45). The screw (44) is threaded through the cutting frame (5). Cutting components (7) are arranged opposite to each other at the upper and lower ends of the side wall of the cutting frame (5). Spinning components (8) are arranged opposite to each other at the left and right ends of the side wall of the cutting frame (5). A radial drive structure is provided on the cutting frame (5). The radial drive structure drives the cutting components (7) and the spinning components (8) to move radially closer to the pipe synchronously. The cutting assembly (7) includes a fixed frame (71), in which a cutting wheel (72) is rotatably mounted. A cutting motor (711) is fixedly mounted on one side of the fixed frame (71), and the output end of the cutting motor (711) is connected to the cutting wheel (72). A cavity (73) is fixedly mounted on one side of the fixed frame (71), and a shaft (74) is coaxially inserted through the cavity (73). A piston (741) is fixedly mounted at the bottom of the shaft (74), and the piston (741) is adapted to slide within the cavity (73). 3) An extension housing (732) is provided on one side. The extension housing (732) is rotatably mounted with a toothed gear (733) via a synchronous shaft (734). A toothed plate (742) is provided on one side of the shaft (74). The toothed gear (733) meshes with the toothed plate (742). The output shaft of the cutting motor (711) is connected to the synchronous shaft (734) via a synchronous belt (712). A liquid storage tank (54) is fixedly provided on the cutting frame (5). The bottom of one side of the cavity (73) is connected to the liquid storage tank (54) via a liquid inlet pipe (75).

2. The fixed-length cutting device for MPP pipes according to claim 1, characterized in that, A nozzle (731) is provided at the bottom of the cavity (73), a one-way valve (751) is provided on the inlet pipe (75), a top plate (743) is fixedly provided at the top of the shaft (74), and a return spring (744) is provided between the bottom of the top plate (743) and the top of the cavity (73).

3. The fixed-length cutting device for MPP pipes according to claim 1, characterized in that, The spinning assembly (8) includes a sleeve (81), a movable block (82) is slidably installed inside the sleeve (81), an arc-shaped pressure block (83) is fixedly connected to one end of the movable block (82), a ball bearing (831) is rolled on the inner arc wall of the arc-shaped pressure block (83), a displacement sensor (822) is fixedly installed at the other end of the movable block (82), a push spring (823) is provided between the end of the movable block (82) and the sleeve (81), a limit rod (821) is fixedly provided on both sides of the movable block (82), a limit groove (811) is provided through both sides of the sleeve (81), and the limit rod (821) is adapted to be slidably installed in the limit groove (811).

4. The fixed-length cutting device for MPP pipes according to claim 3, characterized in that, The radial drive structure includes a slide (52) and a gear (55). A groove (51) is radially provided on the side wall of the cutting frame (5). The slide (52) is slidably installed in the groove (51). The fixing frame (71) and the sleeve (81) are fixedly connected to the corresponding slide (52). A rotating groove (56) is provided on the side wall of the cutting frame (5). The gear (55) is rotatably installed in the rotating groove (56). A servo motor (53) is fixedly provided on the side wall of the cutting frame (5). A mating gear (531) is connected to the output end of the servo motor (53). The mating gear (531) meshes with the gear (55).

5. The fixed-length cutting device for MPP pipes according to claim 4, characterized in that, A drive groove (551) is uniformly provided on the toothed disc (55), and a pin (521) is fixedly provided on the slide (52). The pin (521) is adapted to slide in the corresponding drive groove (551), and a return spring (522) is provided between the end of the slide (52) and the slide groove (51).

6. The fixed-length cutting device for MPP pipes according to claim 1, characterized in that, A positioning baffle (6) is fixedly provided in the center of the rotating plate (4). A central column (61) extends from the center of the positioning baffle (6). The central column (61) is coaxially inserted into the inside of the pipe. A receiving groove (611) is evenly provided on the circumferential wall of the central column (61). A positioning block (64) is provided in the receiving groove (611). A sliding groove (62) is evenly provided on the rotating plate (4). A sliding block (63) is slidably installed in the sliding groove (62). A compression spring (65) is provided between the top of the sliding block (63) and the sliding groove (62). The sliding block (63) and the corresponding positioning block (64) are integrally connected to form an L-shape. A positioning roller (66) is rotatably installed on the surface of the positioning block (64). The positioning roller (66) rolls against the inner wall of the pipe.

7. The fixed-length cutting device for MPP pipes according to claim 1, characterized in that, A sliding sleeve (3) is provided on one side of the mounting plate (2). The pipe passes through the sliding sleeve (3) coaxially. A support plate (38) extends from the bottom of the sliding sleeve (3). A telescopic cylinder (11) is fixedly provided at the upper end of the base (1). The output section of the telescopic cylinder (11) is fixedly connected to the support plate (38). Several drive wheels (31) are evenly rotatably mounted on the sliding sleeve (3). The drive wheels (31) are in contact with the surface of the pipe and are driven to rotate by the drive motor (32). 3) Several connecting rods (33) are rotatably mounted on the upper part. The other end of the connecting rod (33) is rotatably engaged with the slider (34). A slide rail (21) is provided on the side wall of the mounting plate (2). The slider (34) is adapted to slide in the corresponding slide rail (21). A compression spring (37) is provided between the end of the slider (34) and the slide rail (21). A connecting rod (35) is provided extending from the bottom of the slider (34). A clamping block (36) is fixedly provided at the bottom of the connecting rod (35).

8. The fixed-length cutting device for MPP pipes according to claim 1, characterized in that, A rotating frame (13) is fixedly installed on the upper end of the base (1). A rotating shaft (41) extends from the center of the rotating plate (4). The rotating shaft (41) rotates through the rotating frame (13). A rotary motor (12) is fixedly installed on the side wall of the rotating frame (13). The output end of the rotary motor (12) is connected to the rotating shaft (41) through a transmission belt (14).

9. The fixed-length cutting device for MPP pipes according to claim 1, characterized in that, The mounting plate (2) has an annular groove (22) on its side wall, and the ring frame (43) is rotatably installed in the annular groove (22).

10. A method for cutting MPP pipes to a fixed length, employing the MPP pipe cutting device as described in claim 1, characterized in that, Includes the following steps: Step 1: Determine the distance, drive the screw (44) to rotate by moving the motor (45), and the screw (44) drives the cutting frame (5) to slide along the slide bar (42) until it moves to the designated position and stays still; Step 2: Spin cutting. The radial drive structure drives the cutting component (7) and the spinning component (8) to approach the pipe radially at the same time. While cutting, the cutting component (7) squeezes and positions the pipe through the spinning component (8), thereby achieving continuous fixed-length cutting of the pipe.

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