A production equipment and production process of heat-resistant polyethylene PE-RTⅡ type pipe

Abstract

The invention relates to the technical field of pipe production equipment, and in particular to a production equipment and a production process of a heat-resistant polyethylene PE-RTⅡ type pipe, comprising a telescopic reset seat, an expansion device, a trimming cutter, a horizontal displacement device and an outer wall rotation repair device; the telescopic reset seat is installed at the axial position of an extruder output end; the expansion device is rotatably installed on the telescopic end of the telescopic reset seat, the expansion device is coaxially arranged with the telescopic reset seat, and the expansion device is provided with a plurality of expansion ends; a plurality of trimming cutters are provided and are evenly distributed on the expansion end of the expansion device; a horizontal displacement device is arranged on the outer side of the telescopic reset seat, and the horizontal displacement device is fixedly connected to the extruder output end; an outer wall rotation repair device is installed at the movable end of the horizontal displacement device, a rotation repair sleeve is provided on the outer wall rotation repair device, and the rotation repair sleeve is coaxially arranged with the expansion device. The invention can effectively improve production efficiency and production quality.

Description

Technical Field

[0001] The invention relates to the technical field of pipe production equipment, and in particular to production equipment and a production process for heat-resistant polyethylene PE-RTⅡ type pipes. Background Art

[0002] The production equipment of PE-RTⅡ pipes mainly includes high-performance extruders, molds, cooling devices, traction devices and cutting devices.

[0003] Chinese patent number CN103587121B discloses a processing method of ultra-high molecular weight polyethylene composite steel pipe, comprising the following steps: uniformly mixing raw materials ultra-high molecular weight polyethylene resin, graphite, polyethylene wax, and antioxidant, adding the uniformly mixed raw materials to the barrel of a screw extruder, and obtaining a pipe material consistent with the shape of the die through a certain shape of the die on the screw extruder under the rotating extrusion action of the screw, and the pipe material passes through a shaping device and a cooling device, and the cooling adopts a water-oil cooling method to make it cool and harden and shape; after the product plastic parts are extruded from the die, the product is continuously and evenly drawn out while cooling, and the product obtained by cooling and shaping is cut by a cutting device, and the cut product is inspected, and the qualified product is an ultra-high molecular weight polyethylene pipe; the ultra-high molecular weight polyethylene pipe is cut and post-processed, and the post-processed ultra-high molecular weight polyethylene pipe is lined in a steel pipe to obtain an ultra-high molecular weight polyethylene composite steel pipe. The device has a simple process, is easy to manufacture, and the obtained pipe has high wear resistance, self-lubrication, strength, stable chemical properties, and strong anti-aging performance.

[0004] Although the above device can cut polyethylene pipes, the overall material of polyethylene pipes is relatively soft when they are just extruded and has not yet reached a completely hardened state. In this case, if the cutting method is directly adopted from the outside to the inside, the cutting edge of the cutting knife is easily squeezed and shrinks into the inside of the pipe due to the softness of the pipe material during the process of cutting into the pipe. This shrinkage not only affects the dimensional accuracy of the pipe, but may also cause the cross-sectional shape of the pipe to change, thereby affecting its subsequent use effect. Summary of the invention

[0005] In view of the above problems, a production equipment and production process of heat-resistant polyethylene PE-RTⅡ type pipe are provided, which can effectively improve production efficiency and production quality through trimming and cutting devices.

[0006] In order to solve the problems of the prior art, the present invention provides a production equipment for heat-resistant polyethylene PE-RTⅡ type pipes, comprising a trimming and cutting device installed on the output end of an extruder, the trimming and cutting device comprising a telescopic reset seat, an expansion device, a trimming and cutting knife, a horizontal displacement device and an outer wall rotation repair device; the telescopic reset seat is installed at the axial position of the output end of the extruder; the expansion device is rotatably installed on the telescopic end of the telescopic reset seat, the expansion device is coaxially arranged with the telescopic reset seat, and the expansion device is provided with a plurality of expansion ends; a plurality of trimming and cutting knives are provided and evenly distributed at the expansion end of the expansion device, and the trimming and cutting knives are used for cutting heat-resistant polyethylene pipes; the horizontal displacement device is arranged on the outer side of the telescopic reset seat, and the horizontal displacement device is fixedly connected to the output end of the extruder; the outer wall rotation repair device is installed at the movable end of the horizontal displacement device, and a rotation repair sleeve is provided on the outer wall rotation repair device, the rotation repair sleeve is coaxially arranged with the expansion device, and the inner wall of the rotation repair sleeve is arranged opposite to the trimming and cutting knife.

[0007] Preferably, the telescopic reset seat includes a fixed mounting seat, a guide sleeve is provided on the fixed mounting seat, a limited telescopic rod is installed inside the guide sleeve, the limited telescopic rod is slidably connected to the guide sleeve, a reset spring is installed between the guide sleeve and the limited telescopic rod, the telescopic end of the limited telescopic rod is rotatably connected to the expansion device, an anti-rotation component is installed between the limited telescopic rod and the expansion device, the anti-rotation component includes a limited tooth ring fixedly mounted on the limited telescopic rod, the inner wall of the limited tooth ring is covered with flexible racks, and the anti-rotation component also includes a rotating tooth ring fixedly mounted on the expansion device, and the outer wall of the rotating tooth ring is in conflict with the flexible rack.

[0008] Preferably, the expansion device includes a rotating sleeve rotatably mounted on the limit telescopic rod, a limit mounting plate fixedly mounted on the rotating sleeve, a plurality of linear telescopic rails are provided on the limit mounting plate, a synchronous driving plate is rotatably mounted on the limit mounting plate, the synchronous driving plate is rotatably connected to the limit mounting plate, a plurality of inclined driving rails are provided on the synchronous driving plate, telescopic mounting strips are installed in the linear telescopic rails, a driving column is provided on the telescopic mounting strip, the driving column is in sliding contact with the inclined driving rail, a mounting groove is provided on the end of the telescopic mounting strip away from the driving column, and the expansion device also includes a first rotating driver that drives the synchronous driving plate to rotate.

[0009] Preferably, the trimming cutting blade is installed on the installation groove, and first repair rollers are installed on both sides of the trimming cutting blade.

[0010] Preferably, the horizontal displacement device includes a fixed adjustment seat installed on the outer wall of the extruder output end, a fixed mounting ring is provided on the side of the fixed adjustment seat, the fixed mounting ring is coaxially arranged with the fixed adjustment seat, a guide sleeve is installed on the fixed mounting ring, a limit guide rod and an adjusting screw are installed between the fixed mounting ring and the fixed adjustment seat, a movable adjustment sleeve is also installed on the limit guide rod and the adjusting screw, a speed meter is also installed on the fixed adjustment seat, and the horizontal displacement device also includes a second rotary drive that drives the adjusting screw to rotate.

[0011] Preferably, the fixed adjustment seat is composed of two semicircular assembling sleeves, the inner wall of the semicircular assembling sleeve is provided with a plurality of disassembly grooves, and each of the disassembly grooves is provided with a detachable interference block.

[0012] Preferably, the outer wall rotation repair device includes a rotating mounting sleeve installed on the movable adjusting sleeve, the side of the rotating mounting sleeve is connected to the rotating repair sleeve ring, the outer sleeve of the rotating mounting sleeve is provided with a driven gear ring, and the outer wall rotation repair device also includes a third rotating drive installed on the movable adjusting sleeve, the output end of the third rotating drive is provided with a driving gear, and the driving gear is meshed with the driven gear ring.

[0013] Preferably, the rotating repair sleeve ring includes a limiting mounting ring installed on the rotating mounting sleeve, two groups of second repair rollers are arranged inside the limiting mounting ring, an interlacing gap is arranged between the two groups of second repair rollers, and a limiting resistance piece is also installed on the limiting mounting ring.

[0014] Preferably, a limiting abutment ring is provided on the inner wall of the limiting abutment member, and a plurality of abutment slots are provided inside the limiting abutment ring.

[0015] A production process of heat-resistant polyethylene PE-RTⅡ type pipes, comprising the following steps;

[0016] S1. When the extruder extrude the hot polyethylene material from the discharge end to form a heat-resistant polyethylene tube, and the heat-resistant polyethylene tube reaches a predetermined length and needs to be cut.

[0017] S2. Start the expansion device, and the multiple expansion ends drive the trimming cutting knife to perform expansion movement, so that the trimming cutting knife can synchronously pass through the inside of the heat-resistant polyethylene pipe and contact the inner wall of the rotating repair ring.

[0018] S3. The horizontal displacement device starts to work, driving the rotating repair sleeve and the extruded heat-resistant polyethylene pipe to move horizontally synchronously.

[0019] S4. While moving horizontally, the outer wall rotation repair device drives the rotation repair ring to rotate. The movement and rotation of the rotation repair ring further drives the trimming cutting knife to move horizontally and rotate synchronously. Through the rotation and movement of the trimming cutting knife, the heat-resistant polyethylene pipe is accurately cut.

[0020] S5. After the cutting is completed, the expansion device will drive the trimming cutting knife to perform synchronous contraction and reset. When the trimming cutting knife is separated from the rotating repair sleeve, the telescopic reset seat drives the expansion device to reset, and the horizontal displacement device simultaneously drives the outer wall rotating repair device to reset, waiting for the next cutting instruction.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. This production equipment realizes an innovative way of cutting from the inside of the heat-resistant polyethylene tube through the expansion device and trimming cutting knife. During the cutting process, multiple trimming cutting knives expand synchronously and pass through the inside of the heat-resistant polyethylene tube to the outside, effectively avoiding the problem of the cutting edge shrinking inwards due to the soft material of the heat-resistant polyethylene tube when cutting from the outside to the inside. This internal cutting method ensures the dimensional accuracy of the heat-resistant polyethylene tube after cutting, providing reliable guarantee for subsequent processing and use.

[0023] 2. The production equipment is also equipped with a mechanism for the coordinated use of an outer wall rotary repair device and a rotary repair sleeve. During the cutting process, the rotary repair sleeve can effectively dock with the trimming cutter and drive the trimming cutter to perform rotary cutting. At the same time, the rotary repair sleeve can also repair and shape the deformed pipe mouth during the cutting process. In addition, the rotary repair sleeve also moves synchronously with the extruded heat-resistant polyethylene pipe through a horizontal displacement device, so that the rotary repair sleeve and the trimming cutter can move and cut, achieving non-stop operation, thereby effectively improving work efficiency, avoiding the phenomenon of eversion of the cutting edge, and optimizing the cross-sectional shape of the heat-resistant polyethylene pipe. This not only improves the aesthetics of the heat-resistant polyethylene pipe, but also ensures its performance in practical applications.

[0024] 3. After cutting, the production equipment can quickly retract and reset the trimming cutter and reset the outer wall rotation repair device, making full preparations for the execution of the next cutting instruction. This efficient cutting and reset mechanism not only improves production efficiency, but also reduces operation difficulty and labor costs. At the same time, the automation level of the equipment has also been significantly improved, making the entire production process smoother and more controllable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional schematic diagram of a production device for heat-resistant polyethylene PE-RTⅡ type pipes of the present invention.

[0026] Figure 2 It is a planar cross-sectional view of a production device for a heat-resistant polyethylene PE-RTⅡ type pipe of the present invention.

[0027] Figure 3 The invention discloses a stereoscopic schematic diagram of a telescopic reset seat, an expansion device and a trimming and cutting knife in a production device for a heat-resistant polyethylene PE-RTⅡ type pipe.

[0028] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle.

[0029] Figure 5 The present invention discloses a planar sectional stereoscopic diagram of a telescopic reset seat, an expansion device and a trimming and cutting knife in a production device for heat-resistant polyethylene PE-RTⅡ type pipes.

[0030] Figure 6 It is a three-dimensional schematic diagram of a horizontal displacement device and an outer wall rotation repair device in a production device for heat-resistant polyethylene PE-RTⅡ type pipes of the present invention.

[0031] Figure 7 It is a three-dimensional schematic diagram of a fixed adjustment seat in a production device for heat-resistant polyethylene PE-RTⅡ type pipes of the present invention.

[0032] Figure 8 It is a three-dimensional schematic diagram of an outer wall rotating repair device in a production device for heat-resistant polyethylene PE-RTⅡ type pipes of the present invention.

[0033] Fig. 9 It is a planar cross-sectional stereoscopic view of a rotary repairing sleeve in a production device for heat-resistant polyethylene PE-RTⅡ type pipes of the present invention.

[0034] Fig.10 It is a three-dimensional schematic diagram of a position limiting abutment member in a production device for a heat-resistant polyethylene PE-RTⅡ type pipe of the present invention.

[0035] The numbers in the figure are:

[0036] 1. Extruder; 2. Telescopic reset seat; 21. Fixed mounting seat; 22. Guide sleeve; 23. Position-limiting telescopic rod; 24. Reset spring; 25. Anti-rotation assembly; 251. Position-limiting tooth ring; 2511. Flexible rack; 252. Rotating tooth ring; 3. Expansion device; 31. Rotating sleeve; 32. Position-limiting mounting plate; 321. Linear telescopic rail; 33. Synchronous drive plate; 331. Inclined drive rail; 34. First rotary drive; 35. Telescopic mounting strip; 36. Driving column; 4. Trimming cutter; 41. First repair roller; 5. Horizontal displacement device; 51. Fixed mounting ring; 51 1. Guide sleeve; 52. Fixed adjustment seat; 521. Semicircular assembly sleeve; 522. Disassembly and assembly groove; 523. Resistance block; 53. Limit guide rod; 54. Adjustment screw; 55. Second rotary drive; 56. Movable adjustment sleeve; 57. Speed ​​meter; 6. Outer wall rotation repair device; 61. Rotation repair sleeve ring; 611. Limit installation ring; 6111. Second repair roller; 612. Limit resistance piece; 6121. Limit resistance ring; 6122. Resistance slot; 62. Third rotary drive; 63. Driving gear; 64. Rotation installation sleeve; 65. Driven gear ring; 7. Heat-resistant polyethylene tube. DETAILED DESCRIPTION

[0037] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0038] See also Figures 1 to 10 As shown, a production equipment for heat-resistant polyethylene PE-RTⅡ type pipes includes a trimming and cutting device installed on the output end of an extruder 1, the trimming and cutting device includes a telescopic reset seat 2, an expansion device 3, a trimming and cutting knife 4, a horizontal displacement device 5 and an outer wall rotation repair device 6; the telescopic reset seat 2 is installed at the axial position of the output end of the extruder 1; the expansion device 3 is rotatably installed on the telescopic end of the telescopic reset seat 2, the expansion device 3 is coaxially arranged with the telescopic reset seat 2, and the expansion device 3 is provided with multiple expansion ends; there are multiple trimming and cutting knives 4, and they are evenly distributed at the expansion end of the expansion device 3, and the trimming and cutting knives 4 are used to cut heat-resistant polyethylene pipes; the horizontal displacement device 5 is arranged on the outer side of the telescopic reset seat 2, and the horizontal displacement device 5 is fixedly connected to the output end of the extruder 1; the outer wall rotation repair device 6 is installed at the movable end of the horizontal displacement device 5, and a rotation repair ring 61 is provided on the outer wall rotation repair device 6, the rotation repair ring 61 is coaxially arranged with the expansion device 3, and the inner wall of the rotation repair ring 61 is arranged opposite to the trimming and cutting knife 4.

[0039] First, the telescopic reset seat 2 is precisely installed at the axial position of the output end of the extruder 1 to ensure that the entire trimming and cutting device can work around the center line of the extruded tube. The expansion device 3 is then rotatably installed on the telescopic end of the telescopic reset seat 2 and is coaxially configured with the telescopic reset seat 2. The expansion device 3 is designed with multiple expansion ends to drive the trimming cutter 4 in subsequent steps. The trimming cutter 4 is evenly distributed on the expansion end of the expansion device 3, and its main function is to cut the heat-resistant polyethylene tube. At the same time, the horizontal displacement device 5 is fixedly arranged on the outside of the output end of the extruder 1 to provide the necessary horizontal movement ability during the cutting process. The outer wall rotation repair device 6 is installed at the movable end of the horizontal displacement device 5. The outer wall rotation repair device 6 is provided with a rotation repair ring 61, which is coaxially configured with the expansion device 3, and its inner wall is arranged relative to the trimming cutter 4. Such a layout ensures the stability and accuracy of the trimming cutter 4 during the cutting process.

[0040] When the extruder 1 extrude the hot polyethylene material from the discharge end to form a heat-resistant polyethylene tube 7, and the heat-resistant polyethylene tube 7 reaches a predetermined length and needs to be cut, the following steps are performed in sequence:

[0041] The expansion device 3 is started, and the multiple expansion ends drive the trimming cutter 4 to perform an expansion movement, so that the trimming cutter 4 can synchronously pass through the inside of the heat-resistant polyethylene tube 7 and contact the inner wall of the rotating repair ring 61.

[0042] The horizontal displacement device 5 starts to work, driving the rotating repair ring 61 and the extruded heat-resistant polyethylene pipe 7 to move horizontally synchronously.

[0043] While moving horizontally, the outer wall rotation repair device 6 drives the rotation repair collar 61 to rotate, and the movement and rotation of the rotation repair collar 61 further drives the trimming cutter 4 to move horizontally and rotate synchronously. Through the rotation and movement of the trimming cutter 4, the heat-resistant polyethylene pipe 7 is accurately cut. The design of the trimming cutter 4 ensures that the cutting edge will not shrink inward, and the rotation repair collar 61 ensures that the cutting edge will not turn outward, thereby effectively ensuring the cutting quality.

[0044] After the cutting is completed, the expansion device 3 will drive the trimming cutting knife 4 to shrink and reset synchronously. When the trimming cutting knife 4 is separated from the rotating repair sleeve, the telescopic reset seat 2 drives the expansion device 3 to reset, and the horizontal displacement device 5 simultaneously drives the outer wall rotating repair device 6 to reset, waiting for the next cutting instruction.

[0045] The device can cut the heat-resistant polyethylene pipe efficiently and accurately, while avoiding the problem of the cutting edge shrinking inward or turning outward, thus ensuring the dimensional accuracy and subsequent use effect of the heat-resistant polyethylene pipe.

[0046] See also Figures 2 to 5As shown, the telescopic reset seat 2 includes a fixed mounting seat 21, on which a guide sleeve 22 is provided, a limited telescopic rod 23 is installed inside the guide sleeve 22, the limited telescopic rod 23 is slidably connected to the guide sleeve 22, a reset spring 24 is installed between the guide sleeve 22 and the limited telescopic rod 23, the telescopic end of the limited telescopic rod 23 is rotatably connected to the expansion device 3, an anti-rotation component 25 is installed between the limited telescopic rod 23 and the expansion device 3, the anti-rotation component 25 includes a limited tooth ring 251 fixedly installed on the limited telescopic rod 23, the inner wall of the limited tooth ring 251 is covered with flexible racks 2511, the anti-rotation component 25 also includes a rotating tooth ring 252 fixedly installed on the expansion device 3, and the outer wall of the rotating tooth ring 252 is in conflict with the flexible rack 2511.

[0047] The fixed mounting seat 21 is stably fixed at the axial center position of the output end of the extruder 1, ensuring the center positioning of the entire trimming and cutting device. The limiting telescopic rod 23 installed inside the guide sleeve 22 can slide inside the guide sleeve 22, and the reset spring 24 installed between the guide sleeve 22 and the limiting telescopic rod 23 provides the elastic force required for reset. The telescopic end of the limiting telescopic rod 23 is rotatably connected to the expansion device 3, ensuring that the expansion device 3 can work around the center line of the extruded tube.

[0048] During the cutting process, the expansion device 3 is started, and the multiple expansion ends drive the trimming cutter 4 to perform expansion movement, so that the trimming cutter 4 can synchronously pass through the inside of the heat-resistant polyethylene tube 7 and contact the inner wall of the rotating repair collar 61. At this time, the horizontal displacement device 5 starts to work, driving the rotating repair collar 61 to move horizontally synchronously with the extruded heat-resistant polyethylene tube 7. While moving horizontally, the outer wall rotating repair device 6 drives the rotating repair collar 61 to rotate. This combination of movement and rotation further drives the trimming cutter 4 to synchronously move horizontally and rotate. Through the precise rotation and movement of the trimming cutter 4, the heat-resistant polyethylene tube 7 is effectively cut.

[0049] When the trimming cutter 4 moves, the limit telescopic rod 23 moves accordingly, and the reset spring 24 is squeezed. When the cutting is completed, the expansion device 3 drives the trimming cutter 4 to retract and reset synchronously, at which time the reset spring 24 releases its elastic force, driving the limit telescopic rod 23 and the expansion device 3 to reset to the initial state.

[0050] In addition, in order to prevent the expansion device 3 from self-rotating, an anti-self-rotation component 25 is designed. The anti-self-rotation component 25 includes a limiting toothed ring 251 fixedly mounted on the limiting telescopic rod 23 and a rotating toothed ring 252 fixedly mounted on the expansion device 3. The inner wall of the limiting toothed ring 251 is covered with flexible racks 2511, which conflict with the outer wall of the rotating toothed ring 252. When the expansion device 3 rotates through the trimming cutter 4 in cooperation with the rotating repair ring 61, the rotating toothed ring 252 will overcome the friction with the flexible rack 2511 and rotate accordingly. When the trimming cutter 4 is reset and loses kinetic energy, the flexible rack 2511 will limit the rotating toothed ring 252 and the expansion device 3 from self-rotating, thereby ensuring that the trimming cutter 4 will still conflict with the corresponding position of the rotating repair ring 61 during expansion during the next cutting, thereby ensuring the stability of the docking between the trimming cutter 4 and the rotating repair ring 61.

[0051] See also Figures 2 to 5 As shown, the expansion device 3 includes a rotating sleeve 31 rotatably mounted on the limit telescopic rod 23, a limit mounting disk 32 is fixedly mounted on the rotating sleeve 31, a plurality of linear telescopic rails 321 are provided on the limit mounting disk 32, a synchronous driving disk 33 is rotatably mounted on the limit mounting disk 32, the synchronous driving disk 33 is rotatably connected with the limit mounting disk 32, a plurality of inclined driving rails 331 are provided on the synchronous driving disk 33, telescopic mounting strips 35 are installed in the linear telescopic rails 321, a driving column 36 is provided on the telescopic mounting strip 35, the driving column 36 is in sliding contact with the inclined driving rail 331, a mounting groove is provided on the end of the telescopic mounting strip 35 away from the driving column 36, and the expansion device 3 also includes a first rotating driver 34 that drives the synchronous driving disk 33 to rotate.

[0052] A plurality of linear telescopic rails 321 are provided on the position-limiting mounting plate 32, and the linear telescopic rails 321 provide a precise path for the movement of the telescopic mounting strip 35. At the same time, a synchronous drive plate 33 is also rotatably mounted on the position-limiting mounting plate 32, and the synchronous drive plate 33 and the position-limiting mounting plate 32 realize relative movement through a rotational connection. Telescopic mounting strips 35 are installed in the linear telescopic rails 321. A driving column 36 is provided on the telescopic mounting strip 35, and the driving column 36 slides against the inclined driving rail 331 on the synchronous drive plate 33. When the synchronous drive plate 33 rotates, the inclined driving rail 331 will push the driving column 36 to move along its inclined direction. Since the driving column 36 is fixedly connected to the telescopic mounting strip 35, the movement of the driving column 36 will drive the telescopic mounting strip 35 to move along the linear telescopic rail 321. An installation groove is provided at one end of the telescopic mounting strip 35 away from the driving column 36, and the installation groove is used to install the trimming and cutting knife 4. Therefore, when the telescopic mounting bar 35 moves along the linear telescopic rail 321 , the trimming and cutting blade 4 will be driven to perform synchronous expansion or contraction movement.

[0053] In order to realize the rotation of the synchronous driving disk 33, the expansion device 3 also includes a first rotation driver 34. When it is necessary to drive multiple trimming and cutting knives 4 to extend and retract, the synchronous driving disk 33 can be driven to rotate by starting the first rotation driver 34. The rotation of the synchronous driving disk 33 is converted into a linear movement of the telescopic mounting strip 35 through the sliding contact relationship between the inclined driving rail 331 and the driving column 36, thereby realizing the synchronous expansion and contraction movement of the trimming and cutting knives 4.

[0054] See also Figure 3 and Figure 4 As shown, the trimming cutter 4 is installed on the installation groove, and first repair rollers 41 are installed on both sides of the trimming cutter 4.

[0055] The trimming cutter 4 is mounted on a mounting groove at one end of the telescopic mounting strip 35 away from the driving column 36, and synchronous expansion and contraction movement is achieved through the movement of the telescopic mounting strip 35. In order to ensure that the cutting edge does not shrink inward, first repair rollers 41 are installed on both sides of the trimming cutter 4.

[0056] When the expansion device 3 is started, the telescopic mounting bar 35 drives the trimming cutter 4 to pass through the interior of the heat-resistant polyethylene tube 7 and simultaneously performs an expansion movement through the coordinated action of the synchronous driving disk 33, the inclined driving rail 331 and the driving column 36. At this time, the first repair roller 41 is in close contact with the inner wall of the heat-resistant polyethylene tube 7.

[0057] During the cutting process, the trimming cutter 4 accurately cuts the heat-resistant polyethylene tube, while the first repair roller 41 trims the cut edge. Due to the close contact between the first repair roller 41 and the inner wall of the heat-resistant polyethylene tube, the first repair roller 41 can effectively prevent the cut edge from shrinking inward during the cutting process, thereby ensuring the flatness and quality of the cut edge.

[0058] See also Figure 2 and Figure 6 As shown, the horizontal displacement device 5 includes a fixed adjustment seat 52 installed on the outer wall of the output end of the extruder 1, a fixed mounting ring 51 is provided on the side of the fixed adjustment seat 52, the fixed mounting ring 51 is coaxially arranged with the fixed adjustment seat 52, a guide sleeve 511 is installed on the fixed mounting ring 51, a limit guide rod 53 and an adjusting screw rod 54 are installed between the fixed mounting ring 51 and the fixed adjustment seat 52, a movable adjustment sleeve 56 is also installed on the limit guide rod 53 and the adjusting screw rod 54, a speed meter 57 is also installed on the fixed adjustment seat 52, and the horizontal displacement device 5 also includes a second rotary driver 55 that drives the adjusting screw rod 54 to rotate.

[0059] A fixed mounting ring 51 is provided beside the fixed adjustment seat 52, and the fixed mounting ring 51 is coaxially arranged with the fixed adjustment seat 52 to ensure the stability of the entire horizontal displacement device 5. A guide sleeve 511 is installed on the fixed mounting ring 51, and the guide sleeve 511 is used to guide the heat-resistant polyethylene pipe 7 to move in a limited position to prevent it from shaking during the cutting process, thereby improving the cutting accuracy and stability.

[0060] A limit guide rod 53 and an adjusting screw rod 54 are installed between the fixed mounting ring 51 and the fixed adjustment seat 52. The limit guide rod 53 provides a stable sliding path for the movable adjustment sleeve 56, ensuring its linearity and stability during movement. The adjusting screw rod 54 is connected to the movable adjustment sleeve 56 through a threaded connection. When the adjusting screw rod 54 rotates, it drives the movable adjustment sleeve 56 to move along the limit guide rod 53. The movement of the movable adjustment sleeve 56 drives the rotating repair sleeve ring 61 to move.

[0061] In order to synchronize the extrusion speed of the rotating repair collar 61 with that of the heat-resistant polyethylene tube 7, the horizontal displacement device 5 further includes a speed meter 57 and a second rotation driver 55. The speed meter 57 monitors the extrusion speed of the heat-resistant polyethylene tube 7 in real time and feeds back the speed signal to the second rotation driver 55. The second rotation driver 55 synchronously adjusts the rotation speed of the screw rod 54 according to the received speed signal, thereby ensuring that the rotating repair collar 61 and the heat-resistant polyethylene tube 7 move horizontally at the same speed.

[0062] During the cutting process, when the extruder 1 extrude the hot polyethylene material from the discharge end and forms the heat-resistant polyethylene tube 7, the horizontal displacement device 5 starts to work. The second rotary driver 55 drives the adjusting screw 54 to rotate, and the adjusting screw 54 drives the movable adjusting sleeve 56 to move along the limiting guide rod 53 through a threaded connection, thereby driving the movement of the rotary repair collar 61. At the same time, the speed meter 57 monitors the extrusion speed of the heat-resistant polyethylene tube 7 in real time, and synchronously adjusts the rotation speed of the second rotary driver 55 according to the speed, ensuring the synchronous movement of the rotary repair collar 61 and the heat-resistant polyethylene tube 7.

[0063] Through the precise control of the horizontal displacement device 5, the stable and synchronous movement of the rotating repair ring 61 and the heat-resistant polyethylene tube 7 is achieved, thereby ensuring the stability and accuracy of the cutting process. After the cutting is completed, the horizontal displacement device 5 drives the rotating repair ring 61 to reset and wait for the next cutting instruction.

[0064] See also Figure 6 and Figure 7 As shown, the fixed adjustment seat 52 is composed of two semicircular assembly sleeves 521 , and the inner wall of the semicircular assembly sleeve 521 is provided with a plurality of disassembly grooves 522 , and each of the disassembly grooves 522 is provided with a detachable interference block 523 .

[0065] The two semicircular assembly sleeves 521 of the fixed adjustment seat 52 are precisely matched and spliced ​​to form a complete fixed adjustment seat 52 structure.

[0066] The abutment block 523 is installed in the disassembly and assembly groove 522. The abutment block 523 is designed to have sufficient elasticity and rigidity and can tightly abut the outer wall of the output end of the extruder 1. Through the abutment of the abutment block 523, the fixed adjustment seat 52 can be firmly installed on the output end of the extruder 1 and maintain the coaxial setting with the output end of the extruder 1. This design ensures the stability and accuracy of the horizontal displacement device 5 during the entire cutting process.

[0067] See also Figure 2 and Figure 8 As shown, the outer wall rotation repair device 6 includes a rotating mounting sleeve 64 installed on the movable adjustment sleeve 56, the side of the rotating mounting sleeve 64 is connected to the rotating repair sleeve ring 61, and the outer side of the rotating mounting sleeve 64 is provided with a driven gear ring 65. The outer wall rotation repair device 6 also includes a third rotating driver 62 installed on the movable adjustment sleeve 56, and the output end of the third rotating driver 62 is installed with a driving gear 63, and the driving gear 63 is meshed with the driven gear ring 65.

[0068] When it is necessary to drive the rotating repair sleeve 61 to rotate, the third rotating driver 62 is started. The output end of the third rotating driver 62 drives the driving gear 63 to rotate. When the driving gear 63 rotates, it drives the driven gear ring 65 to rotate synchronously. When the driven gear ring 65 rotates, it drives the rotating installation sleeve 64 to rotate synchronously. When the rotating installation sleeve 64 rotates, the rotating installation sleeve 64 transmits the rotational force to the rotating repair sleeve 61, so that the rotating repair sleeve 61 rotates synchronously.

[0069] See also Figure 8 and Fig. 9 As shown, the rotating repair ring 61 includes a limiting mounting ring 611 installed on the rotating mounting sleeve 64, and two groups of second repair rollers 6111 are arranged inside the limiting mounting ring 611, and an interlacing gap is arranged between the two groups of second repair rollers 6111. A limiting resistance member 612 is also installed on the limiting mounting ring 611.

[0070] The trimming cutter 4 is inserted into the limiting abutment 612 through the interlaced gap and docked with the limiting abutment 612. Due to the action of the limiting abutment 612, the trimming cutter 4 can remain stable when the rotating repair ring 61 rotates, and rotate synchronously with the rotating repair ring 61. The rotation of the trimming cutter 4 cuts the heat-resistant polyethylene tube 7, and the second repair roller 6111 abuts against the outer wall of the heat-resistant polyethylene tube 7 to prevent the cutting edge from turning outward. The docking of the limiting abutment 612 and the trimming cutter 4 ensures the stability of the trimming cutter 4 during the rotation process and avoids cutting errors caused by shaking or offset. The setting of the second repair roller 6111 not only helps to maintain the flatness of the cutting edge, but also provides a certain supporting force during the cutting process to ensure the smooth progress of the cutting process.

[0071] See also Fig. 9 and Fig.10 As shown, a limiting contact ring 6121 is disposed on the inner wall of the limiting contact member 612 , and a plurality of contact slots 6122 are disposed inside the limiting contact ring 6121 .

[0072] The limiting resistance member 612 is installed on the limiting mounting ring 611 , and the inner wall is provided with a limiting resistance ring 6121 and a plurality of resistance slots 6122 for docking the trimming and cutting blade 4 , and the limiting resistance ring 6121 has a certain elasticity to avoid damage to the trimming and cutting blade 4 when it conflicts with the limiting resistance member 612 .

[0073] A production process of heat-resistant polyethylene PE-RTⅡ type pipes, comprising the following steps;

[0074] S1. When the extruder 1 extrude the hot polyethylene material from the discharge end to form a heat-resistant polyethylene tube 7, and the heat-resistant polyethylene tube 7 reaches a predetermined length and needs to be cut.

[0075] S2, start the expansion device 3, and the multiple expansion ends drive the trimming and cutting blades 4 to perform expansion movement, so that the trimming and cutting blades 4 can synchronously pass through the inside of the heat-resistant polyethylene tube 7 and contact the inner wall of the rotating repair ring 61.

[0076] S3, the horizontal displacement device 5 starts to work, driving the rotating repair ring 61 and the extruded heat-resistant polyethylene tube 7 to move horizontally synchronously.

[0077] S4. While moving horizontally, the outer wall rotation repair device 6 drives the rotation repair ring 61 to rotate. The movement and rotation of the rotation repair ring 61 further drives the trimming cutting knife 4 to move horizontally and rotate synchronously. Through the rotation and movement of the trimming cutting knife 4, the heat-resistant polyethylene tube 7 is accurately cut.

[0078] S5. After the cutting is completed, the expansion device 3 will drive the trimming cutting knife 4 to shrink and reset synchronously. When the trimming cutting knife 4 is separated from the rotating repair sleeve, the telescopic reset seat 2 drives the expansion device 3 to reset, and the horizontal displacement device 5 simultaneously drives the outer wall rotating repair device 6 to reset, waiting for the next cutting instruction.

[0079] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A production device for heat-resistant polyethylene PE-RTⅡ type pipes, comprising a trimming and cutting device installed on the output end of an extruder (1), characterized in that: The trimming and cutting device comprises a telescopic reset seat (2), an expansion device (3), a trimming and cutting knife (4), a horizontal displacement device (5) and an outer wall rotation repair device (6); The telescopic reset seat (2) is installed at the axis center position of the output end of the extruder (1); The expansion device (3) is rotatably mounted on the telescopic end of the telescopic reset seat (2); the expansion device (3) and the telescopic reset seat (2) are coaxially arranged; the expansion device (3) is provided with a plurality of expansion ends; A plurality of trimming and cutting knives (4) are provided and are evenly distributed at the expansion end of the expansion device (3), and the trimming and cutting knives (4) are used to cut the heat-resistant polyethylene pipe; The horizontal displacement device (5) is arranged outside the telescopic reset seat (2), and the horizontal displacement device (5) is fixedly connected to the output end of the extruder (1); The outer wall rotation repair device (6) is mounted on the movable end of the horizontal displacement device (5). A rotation repair collar (61) is provided on the outer wall rotation repair device (6). The rotation repair collar (61) is coaxially arranged with the expansion device (3). The inner wall of the rotation repair collar (61) is arranged opposite to the trimming and cutting knife (4).

2. The production equipment of heat-resistant polyethylene PE-RTⅡ pipe according to claim 1, characterized in that: The telescopic reset seat (2) comprises a fixed mounting seat (21), a guide sleeve (22) is provided on the fixed mounting seat (21), a limited telescopic rod (23) is installed inside the guide sleeve (22), the limited telescopic rod (23) is slidably connected to the guide sleeve (22), a reset spring (24) is installed between the guide sleeve (22) and the limited telescopic rod (23), the telescopic end of the limited telescopic rod (23) is rotatably connected to the expansion device (3), an anti-rotation component (25) is installed between the limited telescopic rod (23) and the expansion device (3), the anti-rotation component (25) comprises a limited toothed ring (251) fixedly mounted on the limited telescopic rod (23), the inner wall of the limited toothed ring (251) is covered with flexible racks (2511), and the anti-rotation component (25) further comprises a rotating toothed ring (252) fixedly mounted on the expansion device (3), the outer wall of the rotating toothed ring (252) is in contact with the flexible rack (2511).

3. The production equipment of a heat-resistant polyethylene PE-RTⅡ pipe according to claim 2, characterized in that: The expansion device (3) comprises a rotating sleeve (31) rotatably mounted on the limit telescopic rod (23), a limit mounting plate (32) fixedly mounted on the rotating sleeve (31), a plurality of linear telescopic rails (321) being provided on the limit mounting plate (32), a synchronous drive plate (33) being rotatably mounted on the limit mounting plate (32), the synchronous drive plate (33) being rotatably connected to the limit mounting plate (32), a plurality of inclined drive rails (331) being provided on the synchronous drive plate (33), a telescopic mounting strip (35) being mounted in each of the linear telescopic rails (321), a drive column (36) being provided on the telescopic mounting strip (35), the drive column (36) being in sliding contact with the inclined drive rail (331), a mounting groove being provided at one end of the telescopic mounting strip (35) away from the drive column (36), and the expansion device (3) further comprises a first rotating driver (34) for driving the synchronous drive plate (33) to rotate.

4. The production equipment of heat-resistant polyethylene PE-RTⅡ pipe according to claim 3, characterized in that: The trimming cutting blade (4) is mounted on the mounting groove, and first repair rollers (41) are mounted on both sides of the trimming cutting blade (4).

5. The production equipment of heat-resistant polyethylene PE-RTⅡ pipe according to claim 1, characterized in that: The horizontal displacement device (5) comprises a fixed adjustment seat (52) mounted on the outer wall of the output end of the extruder (1); a fixed mounting ring (51) is provided on the side of the fixed adjustment seat (52); a guide sleeve (511) is mounted on the fixed mounting ring (51); a limit guide rod (53) and an adjustment screw rod (54) are mounted between the fixed mounting ring (51) and the fixed adjustment seat (52); a movable adjustment sleeve (56) is mounted on the limit guide rod (53) and the adjustment screw rod (54); a speed meter (57) is also mounted on the fixed adjustment seat (52); and the horizontal displacement device (55) further comprises a second rotary driver (55) for driving the adjustment screw rod (54) to rotate.

6. The production equipment of heat-resistant polyethylene PE-RTⅡ pipe according to claim 5, characterized in that: The fixed adjustment seat (52) is composed of two semicircular assembly sleeves (521). The inner wall of the semicircular assembly sleeve (521) is provided with a plurality of disassembly grooves (522). Removable interference blocks (523) are provided in each of the disassembly grooves (522).

7. The production equipment of heat-resistant polyethylene PE-RTⅡ pipe according to claim 5, characterized in that: The outer wall rotation repair device (6) comprises a rotation mounting sleeve (64) mounted on the movable adjustment sleeve (56), the side of the rotation mounting sleeve (64) is connected to the rotation repair sleeve ring (61), the outer side of the rotation mounting sleeve (64) is provided with a driven gear ring (65), and the outer wall rotation repair device (6) further comprises a third rotation driver (62) mounted on the movable adjustment sleeve (56), the output end of the third rotation driver (62) is provided with a driving gear (63), and the driving gear (63) is meshed with the driven gear ring (65).

8. The production equipment of heat-resistant polyethylene PE-RTⅡ pipe according to claim 7, characterized in that: The rotating repair sleeve ring (61) comprises a limit mounting ring (611) mounted on a rotating mounting sleeve (64); two groups of second repair rollers (6111) are arranged inside the limit mounting ring (611); an interlaced gap is arranged between the two groups of second repair rollers (6111); and a limit abutment member (612) is also mounted on the limit mounting ring (611).

9. The production equipment of heat-resistant polyethylene PE-RTⅡ pipe according to claim 8, characterized in that: The inner wall of the position-limiting resistance member (612) is provided with a position-limiting resistance ring (6121), and a plurality of resistance slots (6122) are provided inside the position-limiting resistance ring (6121).

10. A production process of heat-resistant polyethylene PE-RTⅡ pipes, using the production equipment of heat-resistant polyethylene PE-RTⅡ pipes according to any one of claims 1 to 9, characterized in that: The steps include: S1. When the extruder (1) extrude the hot polyethylene material from the discharge end to form a heat-resistant polyethylene tube (7), and the heat-resistant polyethylene tube (7) reaches a predetermined length and needs to be cut: S2, starting the expansion device (3), and the multiple expansion ends drive the trimming and cutting blade (4) to perform an expansion movement, so that the trimming and cutting blade (4) can synchronously pass through the interior of the heat-resistant polyethylene tube (7) and contact the inner wall of the rotating repair ring (61); S3, the horizontal displacement device (5) starts to work, driving the rotating repair ring (61) and the extruded heat-resistant polyethylene tube (7) to move horizontally synchronously; S4. While moving horizontally, the outer wall rotating repair device (6) drives the rotating repair ring (61) to rotate. The movement and rotation of the rotating repair ring (61) further drives the trimming and cutting knife (4) to move horizontally and rotate synchronously. Through the rotation and movement of the trimming and cutting knife (4), the heat-resistant polyethylene pipe (7) is accurately cut; S5. After the cutting is completed, the expansion device (3) drives the trimming cutting knife (4) to retract and reset synchronously. When the trimming cutting knife (4) is separated from the rotating repair sleeve, the telescopic reset seat (2) drives the expansion device (3) to reset, and the horizontal displacement device (5) drives the outer wall rotating repair device (6) to reset at the same time, waiting for the next cutting instruction.

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