Pipe conveying device for PE pipe machining and manufacturing

Abstract

The invention relates to the technical field of pipe production and conveying, in particular to a pipe conveying device for PE pipe machining and manufacturing. The pipe conveying device comprises a first conveying platform and a second conveying platform, a plurality of sets of extrusion rollers are arranged at the front end of the first conveying platform, and the lower ends of the extrusion rollers are connected with the first conveying platform through a pressure air supply structure; a double-end telescopic rod is arranged in the middle of the first conveying platform, two ends of the double-end telescopic rod are contracted when air enters the double-end telescopic rod, and liquid is supplied by the middle of the double-end telescopic rod; through a pressure air supply structure, a double-end telescopic rod, a positioning assembly, a lifting structure and an adjusting structure, full-automatic self-adaptive adjustment of the diameter of a PE pipe is achieved, manual measurement is not needed, after air supply is triggered by the weight of the pipe, the positioning assembly automatically clamps, and the lifting structure and the adjusting structure are synchronously matched with the axis height and the position of an electric roller; the problems that traditional equipment is tedious in manual adjustment and large in error are solved, and the remodeling efficiency and the conveying stability are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of pipe production and conveying technology, and specifically to a pipe conveying device for PE pipe processing and manufacturing. Background Technology

[0002] In the large-scale processing and manufacturing process of PE pipes, pipe conveying is the core link connecting processes such as extrusion molding, cutting to length, quality inspection, and finished product stacking. Its conveying stability and adaptability directly determine the overall efficiency of the production line and the quality of the products. Currently, clamping conveying equipment is widely used in PE pipe production and transportation. To ensure coaxiality when conveying PE pipes of different diameters and specifications, and to avoid offset, collision, or surface scratches, existing equipment requires adaptive adjustments for changes in pipe diameter. However, when changing to different diameter pipes, it is necessary to manually measure the pipe diameter and calculate the adjustment amount, and then adjust the position of the clamping components by tightening bolts or operating pneumatic valve groups. This process is not only cumbersome and time-consuming, but also prone to errors in manual calculation or adjustment, which can cause the central axis of the pipe to deviate from the central axis of the conveying equipment, thereby compromising the stability of the conveying process. Therefore, a pipe conveying device for PE pipe processing and manufacturing is proposed to automatically adjust the position of the clamping conveying equipment according to the pipe diameter, achieve adaptive adjustment, and ultimately improve the conveying efficiency and stability. Summary of the Invention

[0003] To address the problems in the prior art, this invention provides a pipe conveying device for PE pipe processing and manufacturing, which automatically adjusts the position of the clamping and conveying equipment according to the pipe diameter, achieves adaptive adjustment, and ultimately improves conveying efficiency and stability.

[0004] The technical solution adopted by this invention to solve its technical problem is a pipe conveying device for PE pipe processing and manufacturing, including a first conveying platform and a second conveying platform. Several sets of extrusion rollers are arranged at the front end of the first conveying platform. The lower end of the extrusion rollers is connected to the first conveying platform through a pressure air supply structure. A double-headed telescopic rod is arranged in the middle of the first conveying platform. When air is introduced at both ends of the double-headed telescopic rod, it contracts and is supplied with liquid from the middle of the double-headed telescopic rod. The ends of the double-headed telescopic rod are connected to positioning components for clamping PE pipes. A vertically arranged support frame is provided between the first conveying platform and the second conveying platform. A lifting structure is provided below the support frame. Electric rollers are distributed circumferentially inside the support frame. The electric rollers are connected to the support frame through an adjustment structure. The lifting structure and the adjustment structure are hydraulically connected to the middle of the double-headed telescopic rod.

[0005] Specifically, the positioning component includes a vertically arranged drive rod, with a slider fixedly connected to the lower end of the drive rod. The slider is connected to the end of a double-headed telescopic rod via a connecting rod. A channel that is slidably connected to the slider is provided on the first conveying platform. Several sets of fixed rings are provided on the drive rod, and a rotating ring is rotatably connected to the outside of the fixed rings via a rotating bearing.

[0006] Specifically, the pressure air supply structure includes fixed plates installed at both ends of the extrusion roller, and horizontally arranged pressing plates are fixedly connected to the lower ends of the two sets of fixed plates. Several sets of vertically arranged first positioning telescopic rods are fixedly connected between the lower surface of the pressing plate and the upper surface of the first conveying platform. The first conveying platform is provided with several sets of through-mounting slots, and each of the mounting slots is fixedly connected with a pneumatic telescopic rod. The output end of the pneumatic telescopic rod is fixedly connected to the lower surface of the pressing plate, and the fixed end of the pneumatic telescopic rod passes through the mounting slot and is fixedly connected to the lower surface of the first conveying platform through a mounting ring. The fixed end of the pneumatic telescopic rod is connected to both ends of the double-headed telescopic rod through a pipeline.

[0007] Specifically, the lifting structure includes several sets of second positioning telescopic rods vertically arranged on the outside of the support frame. The lower end of the second positioning telescopic rod is fixedly connected to a horizontally arranged support. A lifting hydraulic cylinder is connected between the support and the support frame. The lifting hydraulic cylinder is connected to the middle of the double-headed telescopic rod. The double-headed telescopic rod is filled with hydraulic oil, and the double-headed telescopic rod is connected to the lifting hydraulic cylinder through an oil supply line.

[0008] Specifically, the adjustment structure includes a hydraulic telescopic rod circumferentially arranged on the outside of the support frame. The hydraulic telescopic rod is connected to the middle of the double-headed telescopic rod through an oil supply line. The output end of the hydraulic telescopic rod passes through the support frame and is slidably connected to the support frame. The electric roller includes a U-shaped frame fixedly connected to the output end of the hydraulic telescopic rod. A rotating roller is rotatably connected inside the U-shaped frame. A drive motor for driving the rotating roller to rotate is provided on one side of the U-shaped frame.

[0009] Specifically, each of the several sets of fixed rings is provided with a sliding groove, and adjacent fixed rings are in sealed sliding contact. The drive rod is provided with an air intake channel inside, and the drive rod is slidably connected to the sliding groove. The outer side of the drive rod is provided with several sets of through holes communicating with the air intake channel. A horizontally arranged sealing column is fixedly connected inside the sliding groove. One end of the sealing column passes through the through hole and is slidably connected to the through hole. A return spring is fixedly connected between the inner wall of the sliding groove and the outer side of the drive rod. An air jet rod is fixedly connected to the outer side of the fixed ring. The air jet rod communicates with the inside of the sliding groove. One end of the air jet rod faces the extrusion roller. An air intake connector is provided at the upper end of the drive rod. Sealing plates are fixedly connected to both ends of the drive rod. The sealing plates are in sealed sliding contact with the outer sides of the top and bottom fixed rings.

[0010] Specifically, the first positioning telescopic rod is a damped telescopic rod.

[0011] Specifically, the two sides of the support are fixedly connected to the lower surfaces of the first and second conveying platforms respectively through several sets of fixed brackets.

[0012] Specifically, the lower surfaces of both the first and second conveying platforms are fixedly connected to a support frame.

[0013] The beneficial effects of this invention are: The present invention discloses a pipe conveying device for PE pipe processing and manufacturing. Through a pressure air supply structure, a double-headed telescopic rod, a positioning component, a lifting structure, and an adjustment structure, it achieves fully automatic adaptive adjustment of the PE pipe diameter. No manual measurement is required. After the weight of the pipe triggers the air supply, the positioning component automatically clamps the pipe. The lifting structure and the adjustment structure synchronously adapt to the shaft height and the position of the electric roller. This solves the problems of cumbersome manual adjustment and large errors in traditional equipment, and greatly improves the efficiency of pipe changing and the stability of conveying.

[0014] The present invention discloses a pipe conveying device for PE pipe processing and manufacturing. The fixing ring generates differentiated displacement according to the pipe diameter, which drives the sealing column to control the opening and closing of the through hole. This realizes the air path distribution of large flow air output in the clamping contact area and auxiliary air output in the non-contact area. It can not only quickly cool the PE pipe and avoid clamping deformation, but also reduce compressed air consumption, ensuring pipe quality and energy saving.

[0015] The pipe conveying device for PE pipe processing and manufacturing described in this invention uses a hydraulic oil linkage control between a lifting structure and an adjustment structure via a double-headed telescopic rod, which simplifies system complexity and improves adjustment accuracy and response speed. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is an isometric view of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is an isometric view of the present invention from another perspective; Figure 4 This is a front view of the present invention; Figure 5 for Figure 1 Enlarged view of region A; Figure 6 This is a schematic diagram of the positioning component of the present invention; Figure 7 This is a cross-sectional view of the drive rod portion of the present invention; Figure 8 for Figure 7 Enlarged view of region B; Figure 9 This is a schematic diagram of the support frame connection structure of the present invention; Figure 10 for Figure 9 Enlarged view of region C; Figure 11 This is a cross-sectional view of the double-headed telescopic rod of the present invention; In the diagram: 1. First conveying platform; 2. Second conveying platform; 3. Extrusion roller; 4. Double-headed telescopic rod; 5. Support frame; 6. Rotating roller; 7. Drive rod; 8. Slider; 9. Connecting rod; 10. Channel; 11. Fixing ring; 12. Rotating bearing; 13. Rotating ring; 14. Fixing plate; 15. Pressing plate; 16. First positioning telescopic rod; 17. Mounting slot; 18. Pneumatic telescopic rod; 19. Second positioning telescopic rod; 20. Support; 21. Lifting hydraulic cylinder; 22. Hydraulic telescopic rod; 23. U-shaped frame; 24. Drive motor; 25. Slide groove; 26. Air inlet channel; 27. Through hole; 28. Sealing column; 29. ​​Return spring; 30. Air jet rod; 31. Air inlet connector; 32. Sealing plate; 33. Fixed bracket; 34. Support frame. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0019] The clamping and conveying equipment position can be automatically adjusted according to the pipe diameter to achieve adaptive adjustment, ultimately improving conveying efficiency and stability. This is one embodiment of the invention. Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the pipe conveying device for PE pipe processing and manufacturing according to the present invention includes a first conveying platform 1 and a second conveying platform 2. A plurality of extrusion rollers 3 are arranged at the front end of the first conveying platform 1. The lower end of the extrusion rollers 3 is connected to the first conveying platform 1 through a pressure air supply structure. A double-headed telescopic rod 4 is arranged in the middle of the first conveying platform 1. When air is introduced at both ends of the double-headed telescopic rod 4, it contracts and is supplied with liquid from the middle of the double-headed telescopic rod 4. The ends of the double-headed telescopic rod 4 are all connected to positioning components for clamping PE pipes. A vertically arranged support frame 5 is provided between the first conveying platform 1 and the second conveying platform 2. A lifting structure is provided below the support frame 5. Electric rollers are distributed circumferentially inside the support frame 5. The electric rollers are connected to the support frame 5 through an adjustment structure. The lifting structure and the adjustment structure are hydraulically connected to the middle of the double-headed telescopic rod 4.

[0020] In use, during the conveying process of PE pipe processing and manufacturing, one end of the pipe to be conveyed is first placed stably on several sets of extrusion rollers 3 at the front end of the first conveying platform 1 to ensure that the pipe axis is consistent with the conveying direction of the first conveying platform 1. Then, through the output pushing force of the preceding process of the production line, such as the pipe output pushing force of the extrusion molding equipment, a driving force along the conveying direction is applied to the rear end of the pipe, pushing the pipe to move towards the second conveying platform 2 at a stable speed, thus starting the conveying process. As the pipe moves along the first conveying platform 1, its own weight continuously acts on several sets of extrusion rollers 3 below, causing the extrusion rollers 3 to move downwards in the vertical direction. The downward movement of the extrusion rollers 3 directly drives the pressure air supply structure, which in turn delivers high-pressure gas to both ends of the double-headed telescopic rod 4. When the double-headed telescopic rod 4 is inlet with air, it will retract. The two sets of positioning components connected to its ends move synchronously towards the pipe as the double-headed telescopic rod 4 retracts. When the clamping surfaces of the two sets of positioning components contact the outer wall of the pipe, the positioning components stop moving, thus achieving centered clamping of the pipe. This can effectively limit the radial displacement of the pipe during the conveying process, ensure the coaxiality of the pipe axis and the conveying path, improve the conveying stability, and avoid surface scratches or process connection deviations caused by pipe shaking. As the positioning components move closer to each other as the double-headed telescopic rod 4 retracts, the two ends of the double-headed telescopic rod 4 simultaneously supply hydraulic fluid from its center outwards during air intake and retraction. The output hydraulic medium is delivered to the lifting structure and the adjusting structure, driving the lifting structure to lower the support frame 5. The extension and retraction of the adjusting structure will cause the electric roller to move towards the center of the support frame 5 until the roller surface of the electric roller reaches the preset position that matches the outer wall of the pipe. When the lifting structure moves down to the preset position, the axial position of the support frame 5 corresponds completely with the axial position of the pipe, achieving coaxiality calibration. At this time, the adjusting structure drives the electric roller to stop moving, completing the position adjustment of the support frame 5 and the electric roller, preparing for the subsequent pipe insertion and driving conveying. After the support frame 5 and the electric roller are adjusted, the pipe smoothly passes through the central cavity of the support frame 5 under the pushing force at the front end and the guidance of the positioning component. At this time, the roller surfaces of several sets of circumferentially distributed electric rollers contact the outer wall of the pipe, driving the electric rollers to rotate. The rotation of the electric rollers generates friction along the conveying direction, which drives the pipe to move steadily toward the second conveying platform 2. When the front end of the pipe enters the second conveying platform 2, the second conveying platform 2 can further receive and assist in the conveying, and finally send the pipe into the subsequent cutting to length, quality inspection or finished product stacking process to complete a single conveying cycle. When the diameter of the pipe to be transported is large, the initial distance between the outer wall of the pipe and the two sets of positioning components is small. During the retraction of the double-headed telescopic rod 4 driven by the pressure supply structure, the stroke of the two sets of positioning components towards the pipe is small. Only a short distance is needed to contact and clamp the outer wall of the large-diameter pipe. Since the stroke of the positioning components directly determines the retraction amount of the double-headed telescopic rod 4, a small retraction amount reduces the liquid supply volume in the middle of the double-headed telescopic rod 4, resulting in a reduced downward distance for the lifting structure to drive the support frame 5. Because the axis of the large-diameter pipe is at a higher position, The axis alignment can be achieved without significantly lowering the support frame 5; at the same time, the hydraulic medium supplied to the adjustment structure is also reduced accordingly, and the distance that the adjustment structure drives the electric roller to move towards the center of the support frame 5 is reduced. The electric roller needs to move a shorter distance for large-diameter pipes, so that the roller surface can contact the outer wall of the pipe. After the support frame 5 and the electric roller are adjusted, the pipe continues to move on the first conveying platform 1 and passes through the support frame 5. At this time, the electric roller is in close contact with the outer wall of the pipe. Starting the electric roller can drive the large-diameter pipe to be conveyed stably, and no manual adjustment of parameters is required throughout the process. When the diameter of the pipe to be conveyed is small, the initial distance between the outer wall of the pipe and the two sets of positioning components is large. During the retraction of the double-headed telescopic rod 4 driven by the pressure supply structure, the two sets of positioning components need to move a larger stroke towards the pipe in order to contact the outer wall of the small-diameter pipe and achieve the preset clamping force. The large stroke of the positioning components will increase the retraction of the double-headed telescopic rod 4, which in turn leads to an increase in the liquid supply in the middle. More hydraulic medium enters the lifting structure, increasing the distance that the support frame 5 moves downward. The axis of the small-diameter pipe is low, and the support frame 5 needs to move down significantly to achieve axis alignment. At the same time, more hydraulic medium enters the adjustment structure, increasing the elongation of the electric roller moving towards the center of the support frame 5. The electric roller needs to move a longer distance to ensure that the roller surface is in close contact with the outer wall of the pipe. After the axis of the support frame 5 is completely aligned with the axis of the small-diameter pipe and the electric roller contacts the outer wall of the pipe, the electric roller can be started to drive the small-diameter pipe to move stably along the conveying path until it enters the second conveying platform 2 and subsequent processes. It can automatically adjust the clamping position of the positioning component, the axial height of the support frame 5, and the radial position of the electric roller in real time according to the diameter of the PE pipe. There is no need to manually measure the pipe diameter, calculate the adjustment amount, or operate the bolts. This not only solves the problems of cumbersome adjustment, long time consumption, and easy human error in traditional equipment, but also ensures the coaxiality and stability of the pipe during the transportation process. It effectively reduces the risk of scratches and displacement on the pipe surface, and achieves a dual improvement in the efficiency and quality of PE pipe transportation.

[0021] To facilitate the centered clamping of the pipe, for example, such as Figure 1 , Figure 6 , Figure 7 As shown, the present invention also includes a positioning component comprising a vertically arranged drive rod 7, a slider 8 fixedly connected to the lower end of the drive rod 7, the slider 8 being connected to the end of the double-headed telescopic rod 4 via a connecting rod 9, a channel 10 slidably connected to the slider 8 on the first conveying platform 1, and a plurality of fixed rings 11 provided on the drive rod 7, with a rotating ring 13 rotatably connected to the outer side of the fixed ring 11 via a rotating bearing 12.

[0022] When in use, the PE pipe is placed on the extrusion roller 3 at the front end of the first conveying platform 1. After the weight of the pipe drives the pressure air supply structure to supply air to both ends of the double-headed telescopic rod 4, the double-headed telescopic rod 4 retracts. Through the connecting rod 9, it drives the sliders 8 of the two sets of positioning components to move along the channel 10. That is, the two sets of positioning components move towards the axis of the pipe synchronously. The driving rod 7 moves synchronously with the slider 8. The fixing ring 11 moves towards the pipe together with the driving rod 7. When the fixing ring 11 moves with the driving rod 7 to be close to the outer wall of the pipe, the rotating ring 13 contacts the outer wall of the pipe, realizing the centered clamping of the pipe. This effectively limits the radial displacement of the pipe during the conveying process and ensures the coaxiality of the pipe axis and the conveying path. At the same time, the rotating ring 13 can rotate synchronously with the pipe during the pipe conveying process to avoid scratches on the surface of the PE pipe caused by friction.

[0023] For example, such as Figure 1 , Figure 5 As shown, the present invention also includes a pressure air supply structure comprising fixed plates 14 installed at both ends of the extrusion roller 3, with horizontally arranged pressing plates 15 fixedly connected to the lower ends of the two sets of fixed plates 14, and a plurality of vertically arranged first positioning telescopic rods 16 fixedly connected between the lower surface of the pressing plate 15 and the upper surface of the first conveying platform 1. The first conveying platform 1 is provided with several sets of through-mounted mounting slots 17. Each mounting slot 17 is fixedly connected with a pneumatic telescopic rod 18. The output end of the pneumatic telescopic rod 18 is fixedly connected to the lower surface of the pressing plate 15. The fixed end of the pneumatic telescopic rod 18 passes through the mounting slot 17 and is fixedly connected to the lower surface of the first conveying platform 1 through a mounting ring. The fixed end of the pneumatic telescopic rod 18 is connected to both ends of the double-headed telescopic rod 4 through a pipeline.

[0024] In use, when one end of the PE pipe to be conveyed is placed on several sets of extrusion rollers 3 at the front end of the first conveying platform 1, the weight of the pipe itself acts vertically downward on the roller surface of the extrusion roller 3. The extrusion roller 3 is displaced vertically downward by gravity, which drives the fixed plates 14 fixedly connected at both ends to move down synchronously. The downward movement of the fixed plates 14 will directly drive the pressing plate 15 to move downward in the vertical direction. The pressing plate 15 moves down and squeezes the first positioning telescopic rod 16 and the pneumatic telescopic rod 18. The first positioning telescopic rod 16 ensures that the pressing plate 15 moves down only in the vertical direction, thus ensuring the stability of the downward movement of the pressing plate 15. As the pressing plate 15 moves down, the output end of the pneumatic telescopic rod 18 retracts into the cylinder. Since the pneumatic telescopic rod 18 is connected to both ends of the double-headed telescopic rod 4 through the pipeline, high-pressure gas is quickly transported along the pipeline to the air chambers at both ends of the double-headed telescopic rod 4 to provide the double-headed telescopic rod 4 with retraction power. When the PE pipe completely leaves the extrusion roller 3, the weight of the pipe on the extrusion roller 3 disappears, the first positioning telescopic rod 16 resets, pushes the pressing plate 15 to reset vertically upwards, the pressing plate 15 drives the fixing plate 14 and the extrusion roller 3 to move up to the initial position synchronously, the output end of the pneumatic telescopic rod 18 extends as the pressing plate 15 moves up, the internal cavity volume of the cylinder is restored, and at the same time, the double-headed telescopic rod 4 drives the positioning component to reset and move to the initial state synchronously.

[0025] To facilitate automatic adjustment of the support frame movement according to the pipe size, ensuring complete alignment of the support frame's axis with the pipe's axis, for example, such as... Figure 4 , Figure 9 , Figure 10 , Figure 11 As shown, the present invention also includes a lifting structure comprising several sets of second positioning telescopic rods 19 vertically arranged on the outside of the support frame 5. The lower end of the second positioning telescopic rod 19 is fixedly connected to a horizontally arranged support 20. The support 20 and the support frame 5 are connected to a lifting hydraulic cylinder 21. The lifting hydraulic cylinder 21 is connected to the middle of the double-headed telescopic rod 4. The double-headed telescopic rod 4 is filled with hydraulic oil, and the double-headed telescopic rod 4 is connected to the lifting hydraulic cylinder 21 through an oil supply line.

[0026] When in use, when the PE pipe triggers the pressure supply structure through the extrusion roller 3 and drives the double-headed telescopic rod 4 to retract by air intake at both ends, the hydraulic oil inside the double-headed telescopic rod 4 is supplied to the lifting hydraulic cylinder 21 through the oil supply pipeline due to the extrusion of the chambers at both ends. The lifting hydraulic cylinder 21 drives the support frame 5 connected to it to move downward in the vertical direction. During the movement of the support frame 5 with the piston rod of the lifting hydraulic cylinder 21, the second positioning telescopic rod 19 can ensure the movement stability of the support frame 5 and can automatically adjust the height of the support frame 5 according to the pipe diameter. When conveying large-diameter PE pipes, the initial distance between the outer wall of the pipe and the two sets of positioning components is small, the contraction of the double-headed telescopic rod 4 is reduced, the amount of hydraulic oil entering the lifting hydraulic cylinder 21 is reduced, and the downward movement distance of the support frame 5 is shorter. Since the axis of the large-diameter PE pipe is high and the pipe diameter is large, when it is placed on the first conveying platform 1, the height of the axis from the platform surface is large. The support frame 5 only needs to be moved down slightly to make its own axis completely aligned with the axis of the pipe, which prepares for the subsequent pipe to be smoothly inserted into the support frame 5. Conversely, when conveying small-diameter PE pipes, the initial distance between the outer wall of the pipe and the two sets of positioning components is large, the contraction of the double-headed telescopic rod 4 increases, the amount of hydraulic oil entering the lifting hydraulic cylinder 21 increases, and the support frame 5 moves down a large distance. Because the axis of the small-diameter PE pipe is low and the pipe diameter is small, when placed on the first conveying platform 1, the height of the axis from the platform surface is small. The support frame 5 needs to move down significantly to compensate for the height difference, and finally achieve precise alignment between its own axis and the axis of the pipe, so as to avoid friction between the pipe and the inner wall of the support frame 5 when it is inserted. When the extrusion roller 3 is no longer under the weight of the pipe, the pressure air supply structure slowly resets, stopping the air supply to the double-headed telescopic rod 4. The pressure in the air chambers at both ends of the double-headed telescopic rod 4 decreases, causing the positioning component to begin resetting and moving. As the double-headed telescopic rod 4 resets and moves, it no longer extrudes the lifting hydraulic cylinder 21. At this time, the hydraulic oil in the lifting hydraulic cylinder 21 flows back to the middle of the double-headed telescopic rod 4, thereby causing the support frame 5 to rise vertically to its initial height. The second positioning telescopic rod 19 rises with the support frame 5 and returns to its initial state. The entire lifting structure returns to the standby state, waiting for the next PE pipe to be conveyed and adjusted. The lifting structure uses a metered hydraulic oil supply to match the downward movement distance of the support frame 5 with the pipe diameter. When the support frame 5 moves to a certain position, the central axis of the support frame 5 is completely aligned with the central axis of the pipe, avoiding collisions between the pipe and the electric roller or the inner wall of the support frame 5 when the pipe enters the support frame 5, ensuring the stability of the conveying process and reducing the risk of scratches on the PE pipe surface. The adjustment process of the lifting structure is automatically completed by the hydraulic linkage of the double-headed telescopic rod 4, eliminating the need for manual measurement of the pipe diameter, significantly reducing downtime during production line changeovers, and meeting the needs of large-scale, multi-specification production of PE pipes.

[0027] For example, such as Figure 9As shown, the present invention also includes, the adjusting structure including a hydraulic telescopic rod 22 circumferentially arranged outside the support frame 5, the hydraulic telescopic rod 22 being connected to the middle of the double-headed telescopic rod 4 through an oil supply line, the output end of the hydraulic telescopic rod 22 passing through the support frame 5 and slidably connected to the support frame 5, the electric roller including a U-shaped frame 23 fixedly connected to the output end of the hydraulic telescopic rod 22, a rotating roller 6 being rotatably connected inside the U-shaped frame 23, and a drive motor 24 for driving the rotating roller 6 to rotate being provided on one side of the U-shaped frame 23.

[0028] When in use, when the PE pipe triggers the pressure supply structure through the extrusion roller 3 and drives the double-headed telescopic rod 4 to retract by air intake at both ends, the adjustment structure and the lifting structure start hydraulic adjustment synchronously. During the retraction of the double-headed telescopic rod 4, the hydraulic oil filled inside it is squeezed by the chambers at both ends and diverted to each set of hydraulic telescopic rods 22 through the oil supply pipeline, thereby driving the output end of the hydraulic telescopic rod 22 to extend synchronously. Since the output end is fixed to the U-shaped frame 23, the U-shaped frame 23 moves radially towards the center along the support frame 5 with the output end, and finally drives the rotating roller 6 inside the U-shaped frame 23 to move closer to the pipe. After the support frame 5 and the rotating roller 6 are adjusted, the pipe smoothly passes through the central cavity of the support frame 5 under the pushing force at the front end and the guidance of the positioning component. At the same time, the roller surface of the rotating roller 6 contacts the outer wall of the pipe. When the rotating roller 6 is in contact with the outer wall of the pipe, the drive motor 24 on one side of the U-shaped frame 23 is started. The drive motor 24 drives the rotating roller 6 to rotate. The rotating roller 6 drives the pipe to move stably along the axis of the support frame 5, realizing the power transmission from the first conveying platform 1 to the second conveying platform 2. When the extrusion roller 3 is no longer under the weight of the pipe, the adjustment structure resets synchronously with the whole device. The pressure air supply structure stops supplying air to the double-headed telescopic rod 4. The pressure in the air chambers at both ends of the double-headed telescopic rod 4 decreases. Under the action of its own reset structure, it returns to the initial elongation state. The hydraulic oil inside flows back along the oil supply pipeline to the middle oil chamber of the double-headed telescopic rod 4. After the hydraulic oil in the hydraulic telescopic rod 22 returns, the output end of the hydraulic telescopic rod 22 begins to reset to the initial state. At the same time, it drives the U-shaped frame 23 and the electric roller to move to the outside of the support frame 5 and return to the initial position, waiting for the next PE pipe to be conveyed and adjusted. When the double-headed telescopic rod 4 supplies liquid, the lifting structure adjusts the height of the support frame 5 to align the axis with the pipe. The adjusting structure simultaneously adjusts the radial position of the electric roller to make the roller surface fit with the pipe. The two work together to ensure that the pipe can make precise contact with the electric roller when it enters the support frame 5 without secondary adjustment. This further simplifies the device control logic and improves the continuity and stability of the conveying process.

[0029] For example, such as Figure 7 , Figure 8As shown, the present invention further includes: a plurality of fixed rings 11 each having a sliding groove 25, adjacent fixed rings 11 being in sealed sliding contact; an air intake channel 26 is provided inside the drive rod 7, the drive rod 7 being slidably connected to the sliding groove 25; a plurality of through holes 27 communicating with the air intake channel 26 are provided on the outer side of the drive rod 7; a horizontally arranged sealing column 28 is fixedly connected inside the sliding groove 25, one end of the sealing column 28 passing through the through hole 27 and being in sealed sliding contact with the through hole 27; a return spring 29 is fixedly connected between the inner wall of the sliding groove 25 and the outer side of the drive rod 7; an air jet rod 30 is fixedly connected to the outer side of the fixed ring 11, the air jet rod 30 communicating with the inside of the sliding groove 25, one end of the air jet rod 30 facing the extrusion roller 3; an air intake connector 31 is provided at the upper end of the drive rod 7; sealing plates 32 are fixedly connected to both ends of the drive rod 7, the sealing plates 32 being in sealed sliding contact with the outer sides of the top fixed ring 11 and the bottom fixed ring 11.

[0030] When in use, as the positioning component retracts with the double-headed telescopic rod 4 and approaches the pipe, the rotating ring 13 on the outer side of the fixing ring 11 first contacts the outer wall of the pipe, and the contact position varies significantly with the pipe diameter. When the pipe diameter is large, the initial contact point between its outer wall and the positioning component is biased towards the fixing ring 11 in the upper part of the drive rod 7. When the pipe diameter is small, the initial contact point between its outer wall and the positioning component is biased towards the fixing ring 11 in the lower part of the drive rod 7. After the rotating ring 13 is squeezed by the outer wall of the pipe, it transmits the squeezing force to the corresponding fixing ring 11, pushing the set of fixing rings 11 to slide slightly away from the contact point of the pipe along the slide groove 25. Since the adjacent fixed rings 11 are in sealed sliding contact, after the squeezed fixed ring 11 slides, its internal groove 25 will partially intersect with the grooves 25 of the upper and lower adjacent fixed rings 11. After the intersects, the air passage cross-sectional area between the adjacent grooves 25 will be reduced. When the squeezed fixed ring 11 slides, it will drive the sealing column 28 to move axially along the through hole 27, and finally make the through hole 27 corresponding to the fixed ring 11 completely open. The sealing column 28 no longer blocks the through hole 27. However, the upper and lower fixed rings 11 that are not squeezed do not move, and their sealing columns 28 still partially block the through hole 27. During the sliding process of the fixed ring 11, the return spring 29 is compressed and stores force. High-pressure gas is connected to the air inlet connector 31 at the upper end of the drive rod 7. The gas flows in the air inlet channel 26 to the through hole 27 corresponding to the compressed fixed ring 11, and enters the sliding groove 25 of the set of fixed rings 11. Since the sliding groove 25 of the set of fixed rings 11 only partially intersects with the sliding groove 25 of the upper and lower fixed rings 11, and the jet rod 30 is connected to the inside of the sliding groove 25, most of the gas is ejected along the jet rod 30, forming a large flow of gas. The jet rod 30 is oriented towards the extrusion roller 3, and the gas outlet direction is aligned with the clamping contact point between the tube and the rotating ring 13. Since the surface temperature of the PE pipe is high when it is output from the extrusion molding equipment, direct clamping can easily cause surface dents or deformation due to external force. The air jet rod 30 of the extruded fixing ring 11 is aligned with the clamping contact point between the pipe and the rotating ring 13. A large flow of air is blown directly to this position, which can quickly reduce the temperature of the pipe at the clamping point, increase the surface hardness of the pipe, and prevent the rotating ring 13 from causing indentations or scratches on the surface of the pipe during clamping. At the same time, the sealing plate 32 can ensure the sealing of the slide groove 25 and prevent gas from escaping from the slide groove 25. Meanwhile, some gas will enter the upper and lower uncompressed fixed ring 11 grooves 25 through the interlacing gap between the squeezed fixed ring 11 groove 25 and the upper and lower fixed ring 11 grooves 25. Since the through holes 27 of these fixed rings 11 are still partially blocked by the sealing column 28, the cross-sectional area of ​​the air passage is small, and the amount of gas entering the groove 25 is small. Finally, it is ejected through the jet rod 30 on its outside to form auxiliary gas. This part of the gas can assist in cooling the non-clamped area of ​​the pipe, avoiding stress deformation caused by excessive local temperature difference of the pipe. At the same time, the flow of compressed air can carry away the trace dust on the surface of the pipe or squeeze out residual impurities, which also has a cleaning function and further improves the cleanliness of the pipe surface. Once the PE pipe is completely removed from the positioning assembly, the squeezing force of the pipe on the rotating ring 13 disappears, the return spring 29 releases its stored force, and pushes the squeezed fixed ring 11 to slide in the opposite direction along the slide groove 25 back to the initial position. The fixed ring 11 resets and drives the sealing column 28 to block the through hole 27, the air passage returns to the initial state, and the slide grooves 25 of the adjacent fixed rings 11 are realigned, preparing for the air passage distribution of the next pipe. No manual intervention is required for reset, ensuring production continuity. The air output distribution ratio can be automatically adjusted according to the pipe diameter. Large-diameter pipes, due to their higher axis, prioritize contact with the upper fixing ring 11 of the drive rod 7, resulting in a larger air output in the corresponding area. Small-diameter pipes, with their lower axis, prioritize contact with the lower fixing ring 11, resulting in a larger air output in the corresponding area. Compared to the traditional uniform air output across the entire area, this structure can effectively reduce compressed air consumption, thereby reducing energy costs and preventing pipe performance degradation caused by excessive cooling.

[0031] For example, such as Figure 1 , Figure 5 As shown, the present invention also includes a damped telescopic rod 16 as the first positioning telescopic rod.

[0032] In use, the damped first positioning telescopic rod 16 can delay the upward reset of the telescopic rod until the pipe is completely away from the support frame 5 before fully resetting. This prevents the first positioning telescopic rod 16 from quickly resetting and stopping the air supply to the double-headed telescopic rod 4 when the front end of the pipe moves out but the rear end is still in the support frame 5. Consequently, the double-headed telescopic rod 4 resets, the hydraulic oil flows back, and the lifting hydraulic cylinder 21 drives the support frame 5 to move upward, preventing the rear end of the pipe from being squeezed and damaged, thus ensuring safe transportation.

[0033] For example, such as Figure 3 As shown, the present invention also includes that the two sides of the support 20 are fixedly connected to the lower surfaces of the first conveying platform 1 and the second conveying platform 2 respectively by a number of fixed brackets 33.

[0034] During use, the overall stability of the support 20 and the support frame 5 can be ensured by relying on the fixed bracket 33.

[0035] For example, such as Figure 1 As shown, the present invention also includes a support frame 34 fixedly connected to the lower surface of both the first conveying platform 1 and the second conveying platform 2.

[0036] When in use, the support frame 34 can improve the overall stability of the first conveying platform 1 and the second conveying platform 2.

[0037] In use, one end of the PE pipe to be conveyed is placed stably on several sets of extrusion rollers 3 at the front end of the first conveying platform 1 to ensure that the pipe axis is consistent with the conveying direction of the first conveying platform 1; through the discharge pushing force of the preceding process of the production line, such as the extrusion molding equipment, a driving force along the conveying direction is applied to the rear end of the pipe, pushing the pipe to move towards the second conveying platform 2 at a stable speed. As the pipe moves along the first conveying platform 1, its own weight continuously acts on the lower extrusion roller 3, causing the extrusion roller 3 to move downward in the vertical direction. The downward movement of the extrusion roller 3 drives the fixed plates 14 fixed at both ends to move downward synchronously, thereby driving the pressing plate 15 at the lower end of the fixed plate 14 to move downward in the vertical direction. During the downward movement of the pressing plate 15, it compresses several sets of vertically set first positioning telescopic rods 16 between itself and the first conveying platform 1, and at the same time squeezes the pneumatic telescopic rods 18 in the mounting groove 17 of the first conveying platform 1, causing the output end of the pneumatic telescopic rod 18 to retract into the cylinder. The fixed end of the pneumatic telescopic rod 18 is connected to both ends of the double-headed telescopic rod 4 through a pipeline, and high-pressure gas is delivered to both ends of the double-headed telescopic rod 4 when it retracts. After high-pressure gas enters both ends of the double-headed telescopic rod 4, it drives the double-headed telescopic rod 4 to retract. The ends of the double-headed telescopic rod 4 drive the slider 8 of the positioning component through the connecting rod 9 to slide along the channel 10 on the first conveying platform 1 towards the pipe. The two sets of positioning components move towards the axis of the pipe synchronously. The driving rod 7 of the positioning component moves with the slider 8. The fixing ring 11 on the driving rod 7 moves towards the pipe synchronously until the rotating ring 13 connected to the outer side of the fixing ring 11 through the rotating bearing 12 contacts the outer wall of the pipe. The positioning component stops moving, realizing the centered clamping of the pipe. The rotating ring 13 can rotate synchronously with the pipe to avoid friction and scratches on the surface of the pipe. If the pipe diameter is large, the initial distance between the pipe and the positioning component is small, the stroke of the positioning component moving towards the pipe is short, and the retraction amount of the double-headed telescopic rod 4 is small; if the pipe diameter is small, the initial distance is large, the stroke of the positioning component is long, and the retraction amount of the double-headed telescopic rod 4 is large. When the double-headed telescopic rod 4 retracts with air intake at both ends, hydraulic oil is simultaneously supplied from its middle to the outside. The hydraulic oil is delivered to the lifting structure through the oil supply pipeline. The hydraulic oil enters the lifting hydraulic cylinder 21, driving its piston rod to extend and retract, which in turn moves the support frame 5 downward in the vertical direction. When conveying large-diameter pipes, the double-headed telescopic rod 4 retracts less and the amount of hydraulic oil supplied in the middle is less. The lifting hydraulic cylinder 21 drives the support frame 5 to move downward a short distance. Since the axis of the large-diameter pipe is high, a small downward movement is sufficient for alignment. When conveying small-diameter pipes, the double-headed telescopic rod 4 retracts more and the amount of hydraulic oil supplied is greater. The support frame 5 moves downward a long distance. Since the axis of the small-diameter pipe is low, a large downward movement is required to compensate for the height difference until the axis of the support frame 5 is completely aligned with the axis of the pipe. The lifting structure then stops operating, completing the coaxiality calibration. The hydraulic oil output from the middle of the double-headed telescopic rod 4 is simultaneously delivered to the adjustment structure through the oil supply pipeline to achieve synchronous adjustment with the lifting structure. The hydraulic oil enters the hydraulic telescopic rod 22, driving its output end to extend, which in turn drives the U-shaped frame 23 and the rotating roller 6 to move towards the center of the support frame 5. For large-diameter pipes, the required electric roller movement distance is short and the extension amount of the hydraulic telescopic rod 22 is small. For small-diameter pipes, the required electric roller movement distance is long and the extension amount of the hydraulic telescopic rod 22 is large. The adjustment structure stops operating when the roller surface of the rotating roller 6 contacts and matches the outer wall of the pipe. Under the guidance of the front-end pushing force and the positioning component, the pipe smoothly passes through the central cavity of the support frame 5. At this time, the drive motor 24 on one side of the U-shaped frame 23 is started, which drives the rotating roller 6 to rotate. The rotating roller 6 generates a driving force along the conveying direction by relying on the friction with the outer wall of the pipe, which drives the pipe to move steadily toward the second conveying platform 2. When the front end of the pipe enters the second conveying platform 2, the second conveying platform 2 receives and assists in conveying, ensuring that the pipe moves steadily to the subsequent process. During the pipe clamping and conveying process, the jet function of the positioning component is activated simultaneously. The high-pressure air source is connected through the air inlet connector 31 at the upper end of the drive rod 7. The gas enters the air inlet channel 26 inside the drive rod 7. The fixed ring 11 squeezed by the rotating ring 13 has different positions due to different pipe diameters. The larger diameter pipe squeezes the upper fixed ring 11 of the drive rod 7, while the smaller diameter pipe squeezes the lower fixed ring 11. The squeezed fixed ring 11 slides along the slide groove 25, which drives the sealing column 28 to move, so that the through hole 27 corresponding to the fixed ring 11 is fully opened. For the unsqueezed fixed ring 11, the sealing column 28 still partially blocks the through hole 27. High-pressure gas enters the groove 25 of the corresponding fixed ring 11 through the open through hole 27. Most of the gas is sprayed along the jet rod 30 toward the extrusion roller 3 and aimed at the clamping contact point between the pipe and the rotating ring 13, which quickly cools the clamping area of ​​the pipe and prevents the high-temperature pipe from deforming due to the clamping force. Some of the gas enters the upper and lower fixed rings 11 that are not squeezed through the gap of the groove 25 of the adjacent fixed rings 11, and assists in cooling along their jet rods 30, and carries away dust on the surface of the pipe or squeezes out residual impurities, thus achieving cleaning. Once the pipe has completely left the extrusion roller 3, the extrusion roller 3 loses the weight of the pipe, the first positioning telescopic rod 16 resets, pushing the pressing plate 15, the fixing plate 14, and the extrusion roller 3 to move vertically, the output end of the pneumatic telescopic rod 18 extends, and the air supply to the double-headed telescopic rod 4 stops; the air pressure at both ends of the double-headed telescopic rod 4 decreases, causing the slider 8 of the positioning component to slide in the opposite direction along the channel 10, returning to the initial position; the liquid supply to the middle of the double-headed telescopic rod 4 stops, the hydraulic oil in the lifting hydraulic cylinder 21 flows back to the middle of the double-headed telescopic rod 4, and the support frame 5 rises and resets under the guidance of the second positioning telescopic rod 19; the hydraulic oil in the hydraulic telescopic rod 22 flows back, the output end contracts, causing the U-shaped frame 23 and the rotating roller 6 to move to the outside of the support frame 5, returning to the initial position; the fixing ring 11 slides and resets along the slide groove 25 under the action of the reset spring 29, the sealing column 28 re-seals the through hole 27, and the air jet function stops; the entire device returns to the standby state, waiting for the delivery of the next PE pipe.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pipe conveying device for PE pipe processing and manufacturing, characterized in that, The system includes a first conveying platform (1) and a second conveying platform (2). The first conveying platform (1) has several sets of extrusion rollers (3) at its front end. The lower end of the extrusion rollers (3) is connected to the first conveying platform (1) through a pressure air supply structure. The first conveying platform (1) has a double-headed telescopic rod (4) in the middle. When air is introduced at both ends of the double-headed telescopic rod (4), it contracts and is supplied with liquid by the middle of the double-headed telescopic rod (4). The ends of the double-headed telescopic rod (4) are connected to positioning components that clamp PE pipes. A vertically arranged support frame (5) is provided between the first conveying platform (1) and the second conveying platform (2). A lifting structure is provided below the support frame (5). Electric rollers are distributed around the inner circumference of the support frame (5). The electric rollers are connected to the support frame (5) through an adjustment structure. The lifting structure and the adjustment structure are hydraulically connected to the middle of the double-headed telescopic rod (4).

2. The pipe conveying device for PE pipe processing and manufacturing according to claim 1, characterized in that, The positioning component includes a vertically arranged drive rod (7), with a slider (8) fixedly connected to the lower end of the drive rod (7). The slider (8) is connected to the end of the double-headed telescopic rod (4) via a connecting rod (9). A channel (10) is provided on the first conveying platform (1) to slide in connection with the slider (8). Several sets of fixing rings (11) are provided on the drive rod (7). A rotating ring (13) is rotatably connected to the outside of the fixing ring (11) via a rotating bearing (12).

3. The pipe conveying device for PE pipe processing and manufacturing according to claim 2, characterized in that, The pressure supply structure includes fixed plates (14) installed at both ends of the extrusion roller (3), and horizontally arranged pressing plates (15) are fixedly connected to the lower ends of the two sets of fixed plates (14). Several sets of vertically arranged first positioning telescopic rods (16) are fixedly connected between the lower surface of the pressing plate (15) and the upper surface of the first conveying platform (1). The first conveying platform (1) is provided with several sets of through-mounting slots (17). Each of the mounting slots (17) is fixedly connected with a pneumatic telescopic rod (18). The output end of the pneumatic telescopic rod (18) is fixedly connected to the lower surface of the pressing plate (15). The fixed end of the pneumatic telescopic rod (18) passes through the mounting slot (17) and is fixedly connected to the lower surface of the first conveying platform (1) through the mounting ring. The fixed end of the pneumatic telescopic rod (18) is connected to both ends of the double-headed telescopic rod (4) through a pipeline.

4. The pipe conveying device for PE pipe processing and manufacturing according to claim 3, characterized in that, The lifting structure includes several sets of second positioning telescopic rods (19) vertically arranged on the outside of the support frame (5). The lower end of the second positioning telescopic rod (19) is fixedly connected to a horizontally arranged support (20). The support (20) and the support frame (5) are connected to a lifting hydraulic cylinder (21). The lifting hydraulic cylinder (21) is connected to the middle of the double-headed telescopic rod (4). The double-headed telescopic rod (4) is filled with hydraulic oil and is connected to the lifting hydraulic cylinder (21) through an oil supply line.

5. A pipe conveying device for PE pipe processing and manufacturing according to claim 4, characterized in that, The adjustment structure includes a hydraulic telescopic rod (22) circumferentially arranged outside the support frame (5). The hydraulic telescopic rod (22) is connected to the middle of the double-headed telescopic rod (4) through an oil supply line. The output end of the hydraulic telescopic rod (22) passes through the support frame (5) and is slidably connected to the support frame (5). The electric roller includes a U-shaped frame (23) fixedly connected to the output end of the hydraulic telescopic rod (22). A rotating roller (6) is rotatably connected inside the U-shaped frame (23). A drive motor (24) for driving the rotating roller (6) to rotate is provided on one side of the U-shaped frame (23).

6. The pipe conveying device for PE pipe processing and manufacturing according to claim 5, characterized in that, Each of the several sets of fixed rings (11) is provided with a sliding groove (25), and adjacent fixed rings (11) are in sealed sliding contact. The drive rod (7) is provided with an air intake channel (26) inside, and the drive rod (7) is slidably connected to the sliding groove (25). The outer side of the drive rod (7) is provided with several sets of through holes (27) communicating with the air intake channel (26). A horizontally arranged sealing column (28) is fixedly connected in the sliding groove (25). One end of the sealing column (28) passes through the through hole (27) and is slidably connected to the through hole (27). A return spring (29) is fixedly connected between the inner wall of the groove (25) and the outer side of the drive rod (7). An air jet rod (30) is fixedly connected to the outer side of the fixed ring (11). The air jet rod (30) communicates with the inside of the groove (25). The end of the air jet rod (30) faces the extrusion roller (3). An air inlet connector (31) is provided at the upper end of the drive rod (7). A sealing plate (32) is fixedly connected to both ends of the drive rod (7). The sealing plate (32) is in sealed sliding contact with the outer side of the top fixed ring (11) and the bottom fixed ring (11).

7. A pipe conveying device for PE pipe processing and manufacturing according to claim 6, characterized in that, The first positioning telescopic rod (16) is a damped telescopic rod.

8. A pipe conveying device for PE pipe processing and manufacturing according to claim 7, characterized in that, The two sides of the support (20) are fixedly connected to the lower surfaces of the first conveying platform (1) and the second conveying platform (2) respectively by a number of fixed brackets (33).

9. A pipe conveying device for PE pipe processing and manufacturing according to claim 8, characterized in that, The lower surfaces of the first conveying platform (1) and the second conveying platform (2) are both fixedly connected with a support frame (34).

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