HDPE double-wall corrugated pipe manufacturing device and method thereof

Abstract

This invention relates to the field of corrugated pipe manufacturing and processing, specifically to a manufacturing equipment for HDPE double-wall corrugated pipes. The equipment includes a feeder, an extruder, and a support platform, as well as two movable supports. Slide rails are provided at both ends of the support platform, and a double-wall cooling device is located between the two movable supports. The double-wall cooling device includes an inner wall cooling mechanism, an outer wall cooling mechanism, an inner support mechanism, and a pushing mechanism. When the double-wall corrugated pipe moves along the support platform, the inner wall cooling mechanism is located inside the double-wall corrugated pipe; when the double-wall corrugated pipe moves along the support platform, the outer wall cooling mechanism is located on the outside of the double-wall corrugated pipe. This invention simultaneously cools and reduces the temperature of both the inner and outer walls of the double-wall corrugated pipe through the inner and outer wall cooling mechanisms, enabling the double-wall corrugated pipe to achieve a rapid cooling effect, avoiding interference with demolding and extrusion, and improving the production efficiency of the double-wall corrugated pipe. This invention also relates to a method for manufacturing HDPE double-wall corrugated pipes.

Description

Technical Field

[0001] This invention relates to the field of corrugated pipe manufacturing and processing, specifically to an HDPE double-wall corrugated pipe manufacturing equipment and a HDPE double-wall corrugated pipe manufacturing method. Background Technology

[0002] Currently, the following challenges exist in the manufacturing and processing of HDPE double-wall corrugated pipes: After being formed by extrusion, HDPE double-wall corrugated pipes are at high temperatures and require cooling and solidification. Furthermore, the pipes are continuously extruded after demolding, necessitating continuous movement on a transport frame to prevent disruption to demolding and extrusion. Traditional HDPE double-wall corrugated pipe manufacturing equipment lacks cooling capabilities, relying on primitive tools or natural cooling methods, which increases the time required for cooling.

[0003] The currently disclosed Chinese patent CN202011127190.5 discloses a manufacturing and processing system for HDPE double-wall corrugated pipes, including a transport frame, arc-shaped blocks, an air-cooling mechanism, and a tooth-driven mechanism. Several arc-shaped blocks are evenly arranged along the linear direction between two transport frames. The front and rear ends of each arc-shaped block are welded to the two transport frames, and the arc-shaped blocks have a semi-circular structure. Several air-cooling mechanisms and tooth-driven mechanisms are intermittently and equally spaced along the linear direction of the transport frames. The air-cooling mechanism includes an air-cooling frame, a ventilation slot, air jet holes, air jet branches, a cooling pipe, a connecting pipe, an air inlet, an air inlet pipe, and an air pump. The air-cooling frame is fixedly installed on the transport frames, and the air-cooling frame is an overall ring structure. The air-cooled frame has an annular internal ventilation groove. A plurality of jet holes are evenly distributed along the circumference of the inner wall of the air-cooled frame. The jet holes are connected to the ventilation groove, and jet support chains are installed within the jet holes. Cooling pipes are installed within the ventilation groove, surrounding the entire ventilation groove. An air inlet is provided on the outer wall of one of the air-cooled frames, and the air inlet is connected to the ventilation groove. One end of the air inlet pipe is connected to the air inlet, and the other end is connected to an air pump. The air inlet pipe is located within a transport frame. The air pump is fixedly installed on the outer wall of the transport frame. The ventilation grooves are connected by connecting pipes, which are located within the transport frame.

[0004] According to the aforementioned patent, the patent cools the double-walled corrugated pipe by air cooling. However, the cooling air is unevenly guided. Since both the inner and outer walls of the double-walled corrugated pipe are at high temperatures, cooling only the outer wall is ineffective. Furthermore, because the double-walled corrugated pipe has corrugated sections, the cooling air only acts on the surface of the corrugated sections and cannot act between the two corrugated sections, resulting in some parts not being cooled. Therefore, there is a need for a device that can simultaneously cool the inner and outer walls of the double-walled corrugated pipe and provide air cooling along its corrugated sections during the pushing process of the double-walled corrugated pipe. Summary of the Invention

[0005] To address the problems existing in the current technology, this application provides a manufacturing equipment for HDPE double-wall corrugated pipes. This application uses an inner wall cooling mechanism and an outer wall cooling mechanism to simultaneously cool and reduce the temperature of the inner and outer walls of the double-wall corrugated pipe, enabling the double-wall corrugated pipe to quickly achieve a cooling effect, avoiding affecting the demolding and extrusion of the double-wall corrugated pipe, and improving the production efficiency of the double-wall corrugated pipe.

[0006] To address the problems in the existing technology, the technical solution adopted by this invention is as follows: This invention provides an HDPE double-wall corrugated pipe manufacturing equipment, including a feeder, an extruder, and a support platform; it also includes two movable supports symmetrically arranged at both ends of the support platform, with slide rails at each end of the support platform for each movable support to move. The moving direction of the movable supports is perpendicular to the extrusion direction of the extruder. A double-wall cooling device is provided between the two movable supports, comprising an inner wall cooling mechanism, an outer wall cooling mechanism, an inner support mechanism, and a pushing mechanism. The inner wall cooling mechanism is located on the movable support at the end of the support platform away from the extruder, and is positioned inside the double-wall corrugated pipe when it moves along the support platform. The outer wall cooling mechanism is located on the movable support at the end of the support platform closer to the extruder, and is positioned outside the double-wall corrugated pipe when it moves along the support platform. The inner support mechanism is located on the inner wall cooling mechanism. The pushing mechanism is located on the movable support where the outer wall cooling mechanism is located, and the pushing mechanism is connected to the outer wall cooling mechanism.

[0007] Preferably, the inner wall cooling mechanism includes a fixed plate, a splicing pipe, and a vent pipe; the fixed plate is fixedly mounted on a movable support and is coaxial with the double-wall corrugated pipe extruded by the extruder; there are several splicing pipes, which are coaxial with each other and their ends are fixed together by pipe clamps; one of the splicing pipes is coaxial with and fixedly connected to the fixed plate; the fixed plate has a cold air inlet communicating with the splicing pipe; the vent pipe is coaxial with and fixedly connected to one of the splicing pipes closest to the extruder, and the vent pipe communicates with the splicing pipe; the end of the vent pipe away from the splicing pipe is a closed end, and the wall of the vent pipe has several air holes.

[0008] Preferably, the outer wall cooling mechanism includes a fixed ring and a deflector plate; the fixed ring is fixedly mounted on the movable support, and the fixed ring is coaxial with the vent pipe; there are several deflector plates, which are evenly distributed along the circumference of the fixed ring, and each deflector plate can move along the outer wall of the double-wall corrugated pipe on the fixed ring. The fixed ring is provided with a channel for each deflector plate to move, and each deflector plate is provided with a pipe joint at the end near the double-wall corrugated pipe, and each pipe joint is provided with an air outlet.

[0009] Preferably, a flexible hose is connected between every two adjacent hose fittings, and one of the hoses has a vent and the opening of the hose adjacent to it is provided with a plug.

[0010] Preferably, the inner support mechanism includes a sleeve and an inner support plate; there are two sleeves, which are symmetrically and fixedly sleeved at both ends of the vent pipe; there are four inner support plates, which are evenly distributed along the circumference of the vent pipe, with both ends of each inner support plate extending toward the sleeve, and a tension spring connecting each end of each inner support plate to the corresponding sleeve.

[0011] Preferably, each inner support plate has a first arc-shaped plate near the end of the splicing pipe, the four first arc-shaped plates are coaxial, and a second arc-shaped plate is connected between every two adjacent first arc-shaped plates. Each second arc-shaped plate is coaxial with the first arc-shaped plate. The inner wall of each first arc-shaped plate is provided with a sliding groove for the second arc-shaped plate to slide. Each second arc-shaped plate is slidably sleeved on a guide rod through a guide opening. The guide rod is fixed on the pipe sleeve, and the axis of the guide rod faces the axis of the pipe sleeve.

[0012] Preferably, each of the first arc-shaped plates has a touch switch on its outer wall, and each of the inner support plates has a padding layer on its outer wall.

[0013] Preferably, the pushing mechanism includes a rotating ring, sliders, linkage rods, and stops; the rotating ring is coaxially and rotatably mounted on a fixed ring, and the rotating ring and the fixed ring are connected by bearings; there are several sliders, the number of which is equal to the number of channels on the fixed ring, each slider is slidably mounted in a channel, each lever is hinged to a slider, and a torsion spring is provided at the hinge point between each lever and slider; when the slider is in the channel and close to the inner ring of the fixed ring, the lever is tilted and the pipe joint on the lever is engaged in the corrugated section of the double-walled corrugated pipe; there are several linkage rods, the number of which is equal to the number of sliders, and the two ends of each linkage rod are hinged to the corresponding slider and the rotating ring; there are several stops, the number of which is equal to the number of sliders, and the stops are respectively mounted on the fixed ring and located in each channel close to its inner ring; when the slider moves in the channel toward the outer ring of the fixed ring, the lever remains perpendicular to the axis of the double-walled corrugated pipe due to the obstruction of the stops; the fixed ring is provided with a rotary driver for driving the rotating ring to rotate.

[0014] Preferably, a ring gear that is connected to the rotary driver is fixedly sleeved on the rotating ring.

[0015] The present invention also provides a method for manufacturing HDPE double-wall corrugated pipe, comprising the following steps: S1, the raw materials are fed into the feeder for processing; S2, the processed raw material is shaped by an extruder; S3, the formed double-wall corrugated pipe is conveyed along the support platform by the pushing mechanism under the support of the inner support mechanism; S4, the inner and outer walls of the double-walled corrugated pipe are cooled simultaneously by the inner wall cooling mechanism and the outer wall cooling mechanism; S5, move the moving bracket along with the double-wall cooling device to the side of the extruder, and finally remove the double-wall corrugated pipe.

[0016] The advantages of this application compared to the prior art are: 1. This application uses an inner wall cooling mechanism and an outer wall cooling mechanism to simultaneously cool and reduce the temperature of the inner and outer walls of the double-wall corrugated pipe, enabling the double-wall corrugated pipe to quickly achieve a cooling effect, realizing rapid molding of the double-wall corrugated pipe, avoiding affecting the demolding and extrusion of the double-wall corrugated pipe, and improving the production efficiency of the double-wall corrugated pipe.

[0017] 2. This application uses a method of splicing several connecting pipes together, so that the vent pipe can be kept at the position of the extrusion end of the extruder according to the double-wall corrugated pipe of different lengths, thereby achieving comprehensive cooling of the inner wall of the double-wall corrugated pipe, improving the cooling effect and increasing the cooling range.

[0018] 3. This application, through the connection between the deflector and the pushing mechanism, and the opening of the air outlet at the pipe joint on the deflector, enables the ejected cold air to diffuse along the double-walled corrugated pipe, ensuring that every part of the corrugated section of the double-walled corrugated pipe can be cooled, thereby achieving cooling of the outer wall of the double-walled corrugated pipe and improving the cooling effect. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of an HDPE double-wall corrugated pipe manufacturing equipment. Figure 2 This is a three-dimensional structural diagram of a support platform, a movable bracket, and a double-wall cooling device for an HDPE double-wall corrugated pipe manufacturing equipment. Figure 3 A partial three-dimensional structural diagram of the double-wall cooling device in HDPE double-wall corrugated pipe manufacturing equipment. Figure 1 ; Figure 4 A partial three-dimensional structural diagram of the double-wall cooling device in HDPE double-wall corrugated pipe manufacturing equipment. Figure 2 ; Figure 5 yes Figure 3 Top view; Figure 6 yes Figure 5 A three-dimensional structural cross-sectional view of point AA; Figure 7 This is a partial three-dimensional structural diagram of the inner wall cooling mechanism and the inner support mechanism of an HDPE double-wall corrugated pipe manufacturing equipment. Figure 8 yes Figure 7 The left view; Figure 9 A three-dimensional structural diagram of the outer wall cooling mechanism and the pushing mechanism of an HDPE double-wall corrugated pipe manufacturing equipment. Figure 1 ; Figure 10 A three-dimensional structural diagram of the outer wall cooling mechanism and the pushing mechanism of an HDPE double-wall corrugated pipe manufacturing equipment. Figure 2 ; Figure 11 yes Figure 9 The left view; Figure 12 yes Figure 11 Sectional view at BB; Figure 13 yes Figure 11 A three-dimensional sectional view of the structure at point C; Figure 14 yes Figure 13 Enlarged diagram of point D; Figure 15 This is a flowchart of a method for manufacturing HDPE double-wall corrugated pipes.

[0020] The numbers on the map are: 1-Feeder; 2-Extruder; 3-Supporting platform; 31-Slide rail; 4-Mobile stand; 5-Double-wall cooling device; 51-Inner wall cooling mechanism; 511-Fixed plate; 5111-Cold air inlet; 512-Connecting pipe; 5121-Pipe clamp; 513-Vent pipe; 5131-Air vent; 52-External wall cooling mechanism; 521-Fixing ring; 5211-Channel; 522-Pulley; 5221-Pipe connector; 5222-Air outlet; 523-Hose; 5231-Ventilation port; 5232-Plug; 53-Inner support mechanism; 531-Tube sleeve; 5311-Guide rod; 532-Inner support plate; 5321-Soft pad layer; 533-Tension spring; 534-First arc plate; 535-Second arc plate; 536-Touch switch; 54-Pushing mechanism; 541-Rotating ring; 5411-Bearing; 5412-Ring gear; 542-Slider; 5421-Torsion spring; 543-Linkage rod; 544-Stop; 545-Rotary actuator; 6-Double-wall corrugated pipe. Detailed Implementation

[0021] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0022] See Figures 1-15As shown, an HDPE double-wall corrugated pipe manufacturing equipment includes a feeder 1, an extruder 2, and a support platform 3; it also includes two movable supports 4 symmetrically arranged at both ends of the support platform 3. Each end of the support platform 3 is provided with a slide rail 31 for moving the movable support 4. The moving direction of the movable support 4 is perpendicular to the extrusion direction of the extruder 2. A double-wall cooling device 5 is provided between the two movable supports 4. The double-wall cooling device 5 includes an inner wall cooling mechanism 51, an outer wall cooling mechanism 52, an inner support mechanism 53, and a pushing mechanism 54. The inner wall cooling mechanism 51 is located on the support platform 3 away from the outer wall. On the movable support 4 at one end of the extruder 2, when the double-walled corrugated pipe 6 moves along the support platform 3, the inner wall cooling mechanism 51 is located inside the double-walled corrugated pipe 6; the outer wall cooling mechanism 52 is set on the movable support 4 near the end of the support platform 3 near the extruder 2, and when the double-walled corrugated pipe 6 moves along the support platform 3, the outer wall cooling mechanism 52 is located outside the double-walled corrugated pipe 6; the inner support mechanism 53 is set on the inner wall cooling mechanism 51; the pushing mechanism 54 is set on the movable support 4 where the outer wall cooling mechanism 52 is located, and the pushing mechanism 54 is connected to the outer wall cooling mechanism 52.

[0023] During the production of double-wall corrugated pipe 6, the raw material for producing double-wall corrugated pipe 6 is first fed into feeder 1. Feeder 1 processes the raw material and then feeds it into extruder 2. Next, extruder 2 extrudes the raw material into shape. Since double-wall corrugated pipe 6 needs to be cooled after forming, after being extruded from extruder 2, double-wall corrugated pipe 6 passes through double-wall cooling device 5. Double-wall cooling device 5 cools double-wall corrugated pipe 6. During the processing of double-wall corrugated pipe 6, inner wall cooling mechanism 51 and outer wall cooling mechanism 52 simultaneously cool the inner and outer walls of double-wall corrugated pipe 6. As double-wall corrugated pipe 6 is demolded from extruder 2, pushing mechanism 54 drives... As the double-walled corrugated pipe 6 moves along the support platform 3, the inner support mechanism 53 supports the inner wall of the double-walled corrugated pipe 6 to maintain its stability during movement, ensuring its straight-line movement and preventing it from deviating from the support platform 3 as it gradually moves out of the extruder 2. After the double-walled corrugated pipe 6 is completely removed, it achieves rapid cooling under the combined action of the inner wall cooling mechanism 51 and the outer wall cooling mechanism 52. Finally, the operator cuts the double-walled corrugated pipe 6 to a suitable length and pushes the moving bracket 4 along the slide rail 31 to the side of the extruder 2, at which point the double-walled corrugated pipe 6 is removed.

[0024] See Figures 2-6As shown, the inner wall cooling mechanism 51 includes a fixed plate 511, a splicing pipe 512, and a vent pipe 513. The fixed plate 511 is fixedly mounted on the movable support 4 and is coaxial with the double-wall corrugated pipe 6 extruded by the extruder 2. There are several splicing pipes 512, which are coaxial and their ends are fixed together by pipe clamps 5121. One of the splicing pipes 512 is coaxial with and fixedly connected to the fixed plate 511. The fixed plate 511 has a cold air inlet 5111 that communicates with the splicing pipe 512. The vent pipe 513 is coaxial with and fixedly connected to one of the splicing pipes 512 that is closer to the extruder 2. The vent pipe 513 communicates with the splicing pipe 512, and the end of the vent pipe 513 away from the splicing pipe 512 is a closed end. Several air holes 5131 are opened on the wall of the vent pipe 513.

[0025] As the double-wall corrugated pipe 6 passes through the inner wall cooling mechanism 51, the vent pipe 513 and splicing pipe 512 gradually enter the double-wall corrugated pipe 6 as it moves slowly, and cold air is introduced into the cold air inlet 5111. The cold air enters the vent pipe 513 through several splicing pipes 512, and then acts on the inner wall of the double-wall corrugated pipe 6 through the air holes 5131 on the vent pipe 513, which has a cooling effect on the inner wall of the double-wall corrugated pipe 6. When it is necessary to produce double-wall corrugated pipes 6 of different lengths, the splicing pipes 512 can be spliced ​​together to ensure that the double-wall corrugated pipe 6 can move along the splicing pipes 512, so that the vent pipe 513 is kept at the extrusion end of the extruder 2. After the double-wall corrugated pipe 6 is completely demolded, the entire section can be cooled.

[0026] See Figure 6 and Figure 9 As shown, the outer wall cooling mechanism 52 includes a fixed ring 521 and a deflector plate 522; the fixed ring 521 is fixedly mounted on the movable bracket 4, and the fixed ring 521 is coaxial with the vent pipe 513; there are several deflector plates 522, which are evenly distributed along the circumference of the fixed ring 521, and each deflector plate 522 can move along the outer wall of the double-wall corrugated pipe 6 on the fixed ring 521. The fixed ring 521 has a channel 5211 for each deflector plate 522 to move, and each deflector plate 522 has a pipe joint 5221 at one end near the double-wall corrugated pipe 6, and each pipe joint 5221 has an air outlet 5222.

[0027] As the double-walled corrugated pipe 6 passes through the outer wall cooling mechanism 52, several deflectors 522, driven by the pushing mechanism 54, guide the double-walled corrugated pipe 6 toward the fixed plate 511. Driven by the pushing mechanism 54, the deflectors 522 move along the corrugated section of the double-walled corrugated pipe 6. Since the pipe joint 5221 on the deflector 522 has an air outlet 5222, as cold air is introduced into the pipe joint 5221, the cold air will diffuse to the outer surface of the double-walled corrugated pipe 6 with the movement of the deflectors 522, thus cooling the outer wall of the double-walled corrugated pipe 6. The arrangement of several deflectors 522 ensures that the entire outer circumference of the double-walled corrugated pipe 6 can be cooled. Compared with the existing technology of directly spraying cold air, this method is more effective in cooling every part of the corrugated section of the double-walled corrugated pipe 6.

[0028] See Figure 9 As shown, a flexible hose 523 is connected between every two adjacent hose connectors 5221. One of the hoses 523 has a vent 5231 and a plug 5232 is provided in the vent of the hose 523 adjacent to it.

[0029] When cold air is circulated through the pipe joint 5221, the flexible hose 523 is installed between every two adjacent pipe joints 5221. Cold air is introduced into the vent 5231 of one of the hoses 523. The cold air enters each pipe joint 5221 and is ejected from the vent 5222. The pipe opening of the hose 523 adjacent to the vent 5231 is blocked by the plug 5232, so that the cold air can only be ejected from the vent 5222 of each pipe joint 5221. This makes the cold air act only on the outer wall of the double-wall corrugated pipe 6, improving the utilization rate of the cold air and ensuring that the cold air is more concentrated.

[0030] See Figure 7 and Figure 8 As shown, the inner support mechanism 53 includes a sleeve 531 and an inner support plate 532; there are two sleeves 531, which are symmetrically and fixedly sleeved on both ends of the vent pipe 513; there are four inner support plates 532, which are evenly distributed along the circumference of the vent pipe 513, and both ends of each inner support plate 532 extend toward the sleeve 531 respectively, and a tension spring 533 is connected between both ends of each inner support plate 532 and the corresponding sleeve 531.

[0031] During the movement of the double-walled corrugated pipe 6, the inner support mechanism 53 supports the double-walled corrugated pipe 6. As cold air is ejected from the air hole 5131 on the vent pipe 513, the pressure of the cold air acting on the inner support plate 532 causes the inner support plate 53 to move towards the inner wall of the double-walled corrugated pipe 6 until the inner support plate 532 supports the inner wall of the double-walled corrugated pipe 6. Cold air continues to flow in. By controlling the rate of cold air flow, the pressure on the inner support plate 532 is kept just on the inner wall of the double-walled corrugated pipe 6. The tension spring 533 is in a stretched state. With the support of the inner wall of the double-walled corrugated pipe 6 by the four inner support plates 532, the double-walled corrugated pipe 6 can move along the four inner support plates 532, keeping the double-walled corrugated pipe 6 moving in a straight line and avoiding deviation from the support platform 3.

[0032] See Figure 7 and Figure 8 As shown, each inner support plate 532 has a first arc plate 534 near the end of the splicing pipe 512. The four first arc plates 534 are coaxial. A second arc plate 535 is connected between every two adjacent first arc plates 534. Each second arc plate 535 is coaxial with the first arc plate 534. The inner wall of each first arc plate 534 is provided with a groove for the second arc plate 535 to slide. Each second arc plate 535 is slidably sleeved on a guide rod 5311 through a guide opening. The guide rod 5311 is fixed on the pipe sleeve 531, and the axis of the guide rod 5311 faces the axis of the pipe sleeve 531.

[0033] As the four inner support plates 532 move toward the inner wall of the double-walled corrugated pipe 6 under the pressure of the cold air, each inner support plate 532 has a first arc-shaped plate 534 at its end, and a second arc-shaped plate 535 slides between every two adjacent inner support plates 532. Therefore, as one inner support plate 532 moves, it will drive the other inner support plates 532 to move together, ensuring that the four inner support plates 532 can support the inner wall of the double-walled corrugated pipe 6 at the same time, so that the movement of the double-walled corrugated pipe 6 on the four inner support plates 532 remains stable.

[0034] See Figure 7 and Figure 8 As shown, each of the first arc-shaped plates 534 has a touch switch 536 on its outer wall, and each of the inner support plates 532 has a padding layer 5321 on its outer wall.

[0035] When the inner support plate 532 moves toward the inner wall of the double-walled corrugated pipe 6 until it contacts the inner wall, the touch switch 536 on the first arc plate 534 then touches the inner wall of the double-walled corrugated pipe 6, thereby controlling the rate of cold air intake and maintaining it at a stable value, so that the inner support plate 532 is just supported on the inner wall of the double-walled corrugated pipe 6. When the inner support plate 532 supports its inner wall, the padding layer 5321 prevents the inner wall of the double-walled corrugated pipe 6 from being scratched by the inner support plate 532 during the movement.

[0036] See Figures 9-14 As shown, the pushing mechanism 54 includes a rotating ring 541, a slider 542, a linkage rod 543, and a stop block 544. The rotating ring 541 is coaxially and rotatably mounted on the fixed ring 521, and the rotating ring 541 and the fixed ring 521 are connected by a bearing 5411. There are several sliders 542, and the number of sliders 542 is equal to the number of channels 5211 on the fixed ring 521. Each slider 542 is slidably mounted in one channel 5211. Each lever 522 is hinged to one slider 542. A torsion spring 5421 is provided at the hinge point between each lever 522 and the slider 542. When the slider 542 is in the channel 5211 and close to the inner ring of the fixed ring 521, the lever 522 is tilted and the lever 522 is tilted. The pipe fitting 5221 is inserted into the corrugated section of the double-walled corrugated pipe 6; there are several linkage rods 543, the number of linkage rods 543 is equal to the number of sliders 542, and the two ends of each linkage rod 543 are respectively hinged to the corresponding slider 542 and rotating ring 541; there are several stop blocks 544, the number of stop blocks 544 is equal to the number of sliders 542, and the several stop blocks 544 are respectively set on the fixed ring 521 and located near the inner ring of each channel 5211. When the slider 542 moves towards the outer ring of the fixed ring 521 in the channel 5211, the dial plate 522 remains perpendicular to the axis of the double-walled corrugated pipe 6 under the obstruction of the stop blocks 544; the fixed ring 521 is provided with a rotary driver 545 for driving the rotating ring 541 to rotate.

[0037] As the pushing mechanism 54 guides the double-walled bellows 6 to move, the rotary driver 545 drives the rotating ring 541 to rotate. The rotation of the rotating ring 541 drives the movement of several linkage rods 543. With the movement of the linkage rods 543, the slider 542 slides within the channel 5211, which in turn drives the movement of the dial plate 522. Since the dial plate 522 and the slider 542 are connected by a torsion spring 5421, in the normal state of the torsion spring 5421, the dial plate 522 is tilted relative to the slider 542. When the slider 542 moves, the slider 542 moves. When 42 slides outward in the channel 5211, as the stop block 544 blocks it, the lever 522 changes from an inclined state to a state flush with the slider 542, and the torsion spring 5421 changes to a torsional state. During the movement of the lever 522, it pushes the double-walled bellows 6. The lever 522 also moves along the outer corrugated section of the double-walled bellows 6, so that the cold air can effectively act on the recessed part between two adjacent corrugated sections. This not only guides the movement of the double-walled bellows 6, but also achieves a better cooling effect.

[0038] See Figures 9-11 As shown, a ring gear 5412 that is connected to the rotary driver 545 is fixedly sleeved on the rotating ring 541.

[0039] When the rotary driver 545 is started, the rotary driver 545 drives the rotation of the rotary ring 541 through the ring gear 5412, thus completing the movement of the rotary ring 541 on the linkage rod 543.

[0040] See Figure 15 As shown, a method for manufacturing HDPE double-wall corrugated pipe includes the following steps: S1, the raw materials are fed into the feeder 1 for processing; S2, the processed raw material is shaped through extruder 2; S3, the formed double-wall corrugated pipe 6 is conveyed along the support platform 3 by the pushing mechanism 54 under the support of the inner support mechanism 53; S4, the inner and outer walls of the double-walled corrugated pipe 6 are cooled simultaneously by the inner wall cooling mechanism 51 and the outer wall cooling mechanism 52. S5, move the movable support 4 along with the double-wall cooling device 5 to the side of the extruder 2, and finally remove the double-wall corrugated pipe 6.

[0041] This application uses an inner wall cooling mechanism 51 and an outer wall cooling mechanism 52 to simultaneously cool and reduce the temperature of the inner and outer walls of the double-wall corrugated pipe 6, enabling the double-wall corrugated pipe 6 to quickly achieve a cooling effect, avoiding affecting the demolding and extrusion of the double-wall corrugated pipe 6, and improving the production efficiency of the double-wall corrugated pipe 6.

[0042] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A manufacturing equipment for HDPE double-wall corrugated pipe, comprising a feeder (1), an extruder (2), and a support platform (3). Its features are, It also includes two movable supports (4) symmetrically arranged at both ends of the support platform (3). Each end of the support platform (3) is provided with a slide rail (31) for each movable support (4) to move. The moving direction of the movable support (4) is perpendicular to the extrusion direction of the extruder (2). A double-wall cooling device (5) is provided between the two movable supports (4). The double-wall cooling device (5) includes an inner wall cooling mechanism (51), an outer wall cooling mechanism (52), an inner support mechanism (53), and a pushing mechanism (54). The inner wall cooling mechanism (51) is set on the movable bracket (4) at the end of the support platform (3) away from the extruder (2). When the double wall corrugated pipe (6) moves along the support platform (3), the inner wall cooling mechanism (51) is located inside the double wall corrugated pipe (6). The outer wall cooling mechanism (52) is set on the movable bracket (4) of the support platform (3) near the extruder (2). When the double wall corrugated pipe (6) moves along the support platform (3), the outer wall cooling mechanism (52) is located on the outside of the double wall corrugated pipe (6). The inner support mechanism (53) is mounted on the inner wall cooling mechanism (51); The pushing mechanism (54) is set on the movable support (4) where the outer wall cooling mechanism (52) is located, and the pushing mechanism (54) and the outer wall cooling mechanism (52) are connected in cooperation; The pushing mechanism (54) includes a rotating ring (541), a slider (542), a linkage rod (543), and a stop (544). The rotating ring (541) is coaxially and rotatably mounted on the fixed ring (521), and the rotating ring (541) and the fixed ring (521) are connected by a bearing (5411); There are several sliders (542), and the number of sliders (542) is equal to the number of channels (5211) on the fixed ring (521). Each slider (542) is slidably set in a channel (5211). Each lever (522) is hinged to a slider (542). A torsion spring (5421) is provided at the hinge point between each lever (522) and the slider (542). When the slider (542) is in the channel (5211) and close to the inner ring of the fixed ring (521), the lever (522) is tilted and the pipe joint (5221) on the lever (522) is stuck in the corrugated section of the double-wall corrugated pipe (6). There are several linkage rods (543), and the number of linkage rods (543) is equal to the number of sliders (542). The two ends of each linkage rod (543) are respectively hinged to the corresponding slider (542) and rotating ring (541). There are several stop blocks (544), and the number of stop blocks (544) is equal to the number of sliders (542). Several stop blocks (544) are respectively set on the fixed ring (521) and located near the inner ring of each channel (5211). When the slider (542) moves in the channel (5211) toward the outer ring of the fixed ring (521), the dial plate (522) remains perpendicular to the axis of the double-walled corrugated pipe (6) under the obstruction of the stop blocks (544). The fixed ring (521) is provided with a rotary driver (545) for driving the rotating ring (541) to rotate.

2. The HDPE double-wall corrugated pipe manufacturing equipment according to claim 1, characterized in that, The inner wall cooling mechanism (51) includes a fixed plate (511), a splicing pipe (512), and a vent pipe (513). The fixed plate (511) is fixedly mounted on the movable support (4), and the fixed plate (511) is coaxial with the double-wall corrugated pipe (6) extruded by the extruder (2); There are several splicing pipes (512), and the several splicing pipes (512) are coaxial and the pipe ends are fixed to each other by pipe clamps (5121). One of the splicing pipes (512) is coaxial and fixedly connected to the fixed plate (511). The fixed plate (511) is provided with a cold air inlet (5111) that communicates with the splicing pipe (512). The vent pipe (513) is coaxially and fixedly connected to one of the splicing pipes (512) closest to the extruder (2). The vent pipe (513) is connected to the splicing pipe (512). The end of the vent pipe (513) away from the splicing pipe (512) is a closed end. Several air holes (5131) are opened on the pipe wall of the vent pipe (513).

3. The HDPE double-wall corrugated pipe manufacturing equipment according to claim 2, characterized in that, The outer wall cooling mechanism (52) includes a retaining ring (521) and a baffle (522); The fixing ring (521) is fixedly mounted on the movable bracket (4), and the fixing ring (521) is coaxial with the vent pipe (513); There are several levers (522), and the levers (522) are evenly distributed along the circumference of the fixed ring (521). Each lever (522) can move along the outer wall of the double-walled corrugated pipe (6) on the fixed ring (521). The fixed ring (521) has a channel (5211) for each lever (522) to move. Each lever (522) has a pipe joint (5221) at one end near the double-walled corrugated pipe (6), and each pipe joint (5221) has an air outlet (5222).

4. The HDPE double-wall corrugated pipe manufacturing equipment according to claim 3, characterized in that, A flexible tube (523) is connected between every two adjacent tube joints (5221). One of the flexible tubes (523) has a vent (5231) and a plug (5232) is provided in the vent of the adjacent flexible tube (523).

5. The HDPE double-wall corrugated pipe manufacturing equipment according to claim 3, characterized in that, The internal support mechanism (53) includes a sleeve (531) and an internal support plate (532); There are two sleeves (531), which are symmetrically and fixedly fitted onto both ends of the vent pipe (513); There are four inner support plates (532), which are evenly distributed along the circumference of the vent pipe (513). The two ends of each inner support plate (532) extend toward the sleeve (531), and a tension spring (533) is connected between the two ends of each inner support plate (532) and the corresponding sleeve (531).

6. The HDPE double-wall corrugated pipe manufacturing equipment according to claim 5, characterized in that, Each inner support plate (532) has a first arc plate (534) near the end of the splicing pipe (512). The four first arc plates (534) are coaxial. A second arc plate (535) is connected between every two adjacent first arc plates (534). Each second arc plate (535) is coaxial with the first arc plate (534). The inner wall of each first arc plate (534) is provided with a sliding groove for the second arc plate (535) to slide. Each second arc plate (535) is slidably sleeved on a guide rod (5311) through a guide opening. The guide rod (5311) is fixed on the sleeve (531), and the axis of the guide rod (5311) faces the axis of the sleeve (531).

7. The HDPE double-wall corrugated pipe manufacturing equipment according to claim 6, characterized in that, Each of the first arc-shaped plates (534) has a touch switch (536) on its outer wall, and each of the inner support plates (532) has a padding layer (5321) on its outer wall.

8. The HDPE double-wall corrugated pipe manufacturing equipment according to claim 7, characterized in that, A ring gear (5412) that is connected to the rotary driver (545) is fixedly sleeved on the rotating ring (541).

9. A method for manufacturing HDPE double-wall corrugated pipes, applied to the HDPE double-wall corrugated pipe manufacturing equipment described in any one of claims 1-8, characterized in that, Includes the following steps: S1, put the raw materials into the feeder (1) for processing; S2, the processed raw material is shaped by extruder (2); S3, the formed double-wall corrugated pipe (6) is conveyed along the support platform (3) by the pushing mechanism (54) under the support of the inner support mechanism (53); S4, the inner and outer walls of the double-walled corrugated pipe (6) are cooled simultaneously by the inner wall cooling mechanism (51) and the outer wall cooling mechanism (52); S5, move the moving bracket (4) along with the double-wall cooling device (5) to the side of the extruder (2), and finally remove the double-wall corrugated pipe (6).

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