A thermal insulation HDPE pipe production process and production equipment

Abstract

The present invention provides a heat-insulating HDPE pipe production process and production equipment. Feed rollers are installed on a side bracket, and the feed roller spacing is controlled in combination with an adjustment mechanism to adapt to pipes of different diameters. A fixed-length mechanism is used in conjunction with a transmission rod and a cutting mechanism to achieve automatic fixed-length cutting, thereby improving cutting accuracy and automation level. The driving mechanism cooperates with the continuous transmission mechanism to ensure the smooth progress of the cutting process. The cutting mechanism includes a spring-mounted cutting seat and a cutting machine to achieve stable cutting. The driving disc in the cutting mechanism cooperates with the synchronous belt to control feeding and stopping, and the stabilizing mechanism ensures processing stability through a spring-mounted stabilizing pressure plate. The present invention improves the efficiency and accuracy of HDPE pipe production and processing and reduces labor costs.

Description

Technical Field

[0001] The invention relates to the technical field of heat-insulating HDPE pipe production technology, in particular to a heat-insulating HDPE pipe production technology and production equipment. Background Art

[0002] Insulated HDPE pipe, the full name is high-density polyethylene outer insulation pipe, referred to as HDPE insulation pipe, is a HDPE pipe system that uses high-density polyethylene (HDPE) as the outer sheath and is filled with high-efficiency insulation materials. This HDPE pipe combines the excellent properties of HDPE materials with efficient insulation performance, and is often used in various fields because of its excellent insulation performance, excellent compression resistance, anti-aging ability, strong corrosion resistance and good environmental adaptability.

[0003] In the current production process of HDPE, auxiliary additives such as oxidants, stabilizers, pigments, etc. are added to polyethylene particles, and then the prepared raw materials are placed in the hopper of the extruder. The raw materials are heated and melted by the rotation of the screw, and then the molten raw materials are extruded through the die head of the extruder to form a tube shape. The extruded tube needs to be quickly cooled by a cooling system to solidify and stabilize the shape. Then, the cooled and formed tube is cut as needed to meet the needs of different projects. However, the existing cutting of the formed tube often requires the assistance of staff to ensure that the cutting length meets the requirements, and the cutting accuracy is manually controlled, the degree of automation is poor, and the labor cost is increased.

[0004] Therefore, we propose a thermal insulation HDPE pipe production process and production equipment Summary of the invention

[0005] The purpose of the present invention is to provide a heat-insulating HDPE pipe production process and production equipment to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solution: a production process of a heat-insulating HDPE pipe, comprising the following process:

[0007] Step 1: 80% high-density polyethylene, 3% conductive carbon black, 5% chlorinated polyethylene, 8% microporous foaming agent, 3% titanium dioxide, 3% decabromodiphenyl ether, 2% antimony trioxide, 0.5% benzophenone, 0.5% 2,6-tert-butyl-4-methylphenol, and 3% diatomaceous earth are fully mixed in a high-speed mixer;

[0008] Step 2: The mixed materials are fed into a twin-screw extruder for melt extrusion under high temperature and high pressure. During the extrusion process, the microporous foaming agent is evenly distributed in the molten HDPE matrix and produces tiny bubbles to form a microporous structure;

[0009] Step 3: The extruded pipe is quickly cooled and shaped by the cooling system, and the pipe is cut to a fixed length by the cutting equipment according to the required length;

[0010] Step 4: Package the qualified pipes, mark the production date, specification model, production batch and other information, and then store them in warehouse.

[0011] A heat-insulating HDPE pipe production equipment is applied to the above-mentioned heat-insulating HDPE pipe production process, comprising a bottom plate and a side stand fixedly arranged on the bottom plate, the side stand being equipped with two feed rollers through an adjustment mechanism, the gap between the two feed rollers being used to feed the HDPE pipe, the adjustment mechanism being used to control the gap distance between the two feed rollers to achieve the feeding of HDPE pipes of different diameters, and also comprising:

[0012] A length fixing mechanism is arranged on the bottom plate, and when the HDPE pipe is fed to a proper length by the feeding roller, the HDPE pipe abuts against the length fixing mechanism;

[0013] The transmission rod arranged on the side bracket is rotated by a power device, and the transmission rod is connected to one of the feed rollers through a cutting mechanism. The cutting mechanism is also connected to a fixed length mechanism. When the HDPE pipe abuts against the fixed length mechanism, the fixed length mechanism is used to control the cutting mechanism to separate the transmission rod from the feed roller to stop the feeding action of the HDPE pipe.

[0014] As a further description of the above technical solution: a continuous transmission mechanism is also arranged on the transmission rod, and when the transmission rod is separated from the feed roller by the cutting mechanism, the continuous transmission mechanism is used to maintain the transmission action of the power device. The thermal insulation type HDPE pipe production equipment also includes a lifting frame slidably arranged on the side bracket and a cutting mechanism installed on the lifting frame. The cutting mechanism is connected with the fixed length mechanism through a driving mechanism. When the HDPE pipe is against the fixed length mechanism, the driving mechanism has two strokes. The first stroke: the fixed length mechanism pushes the driving mechanism to connect with the continuous transmission mechanism, and the second stroke: the driving mechanism drives the cutting mechanism to press down to cut the HDPE pipe.

[0015] As a further description of the above technical solution: the adjusting mechanism includes two lifting mounting blocks slidably mounted on the side brackets, and the two feed rollers are rotatably mounted on the two lifting mounting blocks respectively, wherein a cutting support plate is provided on the lifting mounting block located below, and when the HDPE pipe is fed through the two feed rollers, the cutting support plate is used to support the HDPE pipe to facilitate the cutting of the HDPE pipe by the cutting mechanism, and the adjusting mechanism is used to control the movement of the two lifting mounting blocks to adjust the gap between the two feed rollers so as to realize the feeding of HDPE pipes of different diameters.

[0016] As a further description of the above technical solution: the thermal insulation type HDPE pipe production equipment also includes a stabilizing mechanism, which is connected to the cutting mechanism through a synchronous belt four. When the feed roller is separated from the transmission rod and the feeding is stopped, the stabilizing mechanism is pressed down so that the HDPE pipe is pressed against the surface of the cutting support plate to achieve stable cutting of the HDPE pipe.

[0017] As a further description of the above technical solution: the fixed length mechanism includes a slide rail installed on a base plate and a two-way interference rod slidably installed in the slide rail and fixedly connected to a side push block on the surface. A rotating bracket is arranged on the surface of the slide rail through a torsion spring. When the HDPE pipe abuts against the surface of the rotating bracket, the two-way interference rod is used to control the cutting mechanism to stop feeding the HDPE pipe, while connecting the driving mechanism with the continuous transmission mechanism so that the cutting mechanism is pressed down to cut the HDPE pipe.

[0018] As a further description of the above technical solution: the driving mechanism includes a mounting rotating rod rotatably arranged on the bottom plate and a plug-in rod extending into the mounting rotating rod cavity after penetrating the continuous transmission mechanism, the plug-in rod is connected to the cavity surface of the mounting rotating rod through a spring three, and a plurality of groups of cams extending to the outside of the mounting rotating rod cavity are fixedly arranged on the surface of the plug-in rod, and a push plate and a friction disk 2 fixedly connected to each other are slidably arranged on the outer surface of the mounting rotating rod through a spring four, and after the HDPE pipe abuts against the surface of the rotating bracket, one end of the two-way abutting rod abuts against the push plate to make the friction disk 2 dock with the continuous transmission mechanism;

[0019] The continuous transmission mechanism includes a worm rotatably arranged on the side bracket and a worm wheel rotatably arranged on the side bracket and connected to the worm gear. A synchronous belt 1 is installed between the worm and the transmission rod via a pulley. A friction disk 1 is fixedly arranged on the surface of the worm wheel. When the friction disk 1 and the friction disk 2 are docked, the rotation action of the installation rotating rod and the plug-in rod is realized. The end of the plug-in rod away from the installation rotating rod passes through the push plate, the friction disk 1, the friction disk 2 and the worm wheel, and then contacts the inclined surface of the cutting support plate.

[0020] As a further description of the above technical solution: the cutting mechanism includes a cutting seat installed on a side bracket through a spring 2 and a cutting machine installed on the cutting seat, the driving mechanism also includes a pulling wheel 2 rotatably arranged on the cutting seat, two pulling wheels 1 are installed on the outer peripheral side of the pulling wheel 2 through a pulling belt, and the two pulling wheels 1 are rotatably installed on the side plate fixed on the bottom plate, when the plug-in rod rotates, the cam resists the pulling belt to pull the pulling wheel 2 downward, thereby realizing the downward cutting action of the cutting machine.

[0021] As a further description of the above technical solution: the cutting mechanism includes a driving disk rotatably arranged on the side stand bracket, the transmission rod is provided with a card slot on a side surface close to the driving disk, the driving disk is provided with a claw whose one end abuts against the card slot surface by a torsion spring, when the claw abuts against the card slot surface, the transmission rod drives the driving disk to rotate, the surface of the side stand bracket is provided with an adaptive wheel slidingly arranged through a spring five, and the adaptive wheel, the driving disk and one of the feed rollers are provided with a synchronous belt three through a synchronous wheel;

[0022] The cutting mechanism also includes a screw rod three rotatably arranged on the side bracket, and a resistance plate threadedly installed on the screw rod three. A gear is fixedly arranged on the top port of the screw rod three. A rack fixedly connected to one end of the two-way resistance rod is slidably arranged on the top surface of the side bracket. When the HDPE pipe abuts against the surface of the rotating bracket, the rack meshes with the gear.

[0023] As a further description of the above technical solution: the stabilizing mechanism includes a connecting seat fixedly set on the lifting frame, the connecting seat is equipped with a stabilizing pressure plate through a spring, a screw rod one is rotatably set on the side bracket and is threadedly connected to the lifting frame, and a synchronous belt four is installed between the end of the screw rod one and the rotating shaft of the gear through a synchronous wheel.

[0024] In the above technical solution, the present invention provides a heat-insulating HDPE pipe production process and production equipment, which have the following beneficial effects:

[0025] High degree of automation: Through the close cooperation of the length-fixing mechanism, transmission rod, cutting mechanism and driving mechanism, automatic length-fixing and cutting of HDPE pipes are realized, which greatly improves the level of production automation and reduces manual intervention.

[0026] High precision: The equipment can accurately cut the HDPE pipe according to the set length, effectively avoiding the errors caused by manual operation and improving the overall quality of the product.

[0027] Flexible adaptation: The equipment is designed with an adjustable feed roller gap and a cam structure that automatically adapts to different pipe diameters, allowing the equipment to flexibly handle HDPE pipes of different diameters, improving the universality and flexibility of production.

[0028] Better thermal insulation effect: By adding microporous foaming agent, infrared reflector and diatomaceous earth, the thermal insulation effect of the pipe is significantly improved, and it is suitable for various pipeline systems that require thermal insulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0030] Figure 1 A schematic diagram of the overall structure from one angle provided by an embodiment of the present invention;

[0031] Figure 2 A schematic diagram of the overall structure from another angle provided by an embodiment of the present invention;

[0032] Figure 3 A schematic structural diagram of an overall cross section provided for an embodiment of the present invention;

[0033] Figure 4 The embodiment of the present invention provides Figure 3 The enlarged structural diagram at C in the middle;

[0034] Figure 5 A schematic diagram of a structure at a local angle provided by an embodiment of the present invention;

[0035] Figure 6 A schematic diagram of a structure from another angle provided for a local embodiment of the present invention;

[0036] Figure 7 A schematic diagram of a partial cross-section structure provided for an embodiment of the present invention;

[0037] Figure 8 A schematic diagram of the structure of a cutting mechanism provided by an embodiment of the present invention;

[0038] Fig. 9 A schematic structural diagram of an exploded view of a cutting mechanism provided in an embodiment of the present invention;

[0039] Fig.10 The embodiment of the present invention provides Figure 1 The enlarged structural diagram at B in the middle;

[0040] Fig.11 The embodiment of the present invention provides Figure 1 The enlarged structural diagram at A in the middle;

[0041] Fig.12 The embodiment of the present invention provides Fig. 9 Schematic diagram of the structure enlarged at point D in the middle.

[0042] Description of reference numerals:

[0043] 1. Bottom plate; 2. Side push block; 21. Rotating bracket; 22. Two-way resistance rod; 23. Slide rail; 3. Side bracket; 4. Feed roller; 41. Lifting and mounting block; 42. Cutting support plate; 5. Worm; 51. Synchronous belt 1; 52. Worm wheel; 53. Friction disc 1; 6. Main control motor; 7. Lifting frame; 71. Screw 1; 72. Connecting seat; 73. Stable pressure plate; 74. Spring 1; 8. Synchronous belt 2; 9. Cutting seat; 91. Cutting machine; 92. Spring 2; 10. Adjusting motor; 101. Screw 2; 11 , install the rotating rod; 111, side plate; 112, pulling wheel one; 113, pulling belt; 114, pulling wheel two; 115, friction disk two; 116, push plate; 117, cam; 118, plug-in rod; 119, spring three; 1110, spring four; 12, transmission rod; 13, slot; 131, claw; 132, contact plate; 133, screw rod three; 134, driving disk; 135, synchronous belt three; 136, spring five; 137, adaptive wheel; 138, gear; 139, rack; 14, synchronous belt four. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0045] See also Figure 1-12 The embodiment of the present invention provides a technical solution: a production process of a heat-insulating HDPE pipe, comprising the following steps:

[0046] Step 1: 80% high-density polyethylene, 3% conductive carbon black, 5% chlorinated polyethylene, 8% microporous foaming agent, 3% titanium dioxide, 3% decabromodiphenyl ether, 2% antimony trioxide, 0.5% benzophenone, 0.5% 2,6-tert-butyl-4-methylphenol, and 3% diatomaceous earth are fully mixed in a high-speed mixer;

[0047] Step 2: The mixed materials are fed into a twin-screw extruder for melt extrusion under high temperature and high pressure. During the extrusion process, the microporous foaming agent is evenly distributed in the molten HDPE matrix and produces tiny bubbles to form a microporous structure;

[0048] Step 3: The extruded pipe is quickly cooled and shaped by the cooling system, and the pipe is cut to a fixed length by the cutting equipment according to the required length;

[0049] Step 4: Pack the qualified pipes, mark the production date, specification model and production batch, and then store them in the warehouse;

[0050] Among them, the microporous foaming agent can be supercritical carbon dioxide or nitrogen. By adding the microporous foaming agent and titanium dioxide as an infrared reflector, the thermal insulation effect of the pipe is significantly improved, and it is suitable for various pipeline systems that require thermal insulation.

[0051] A heat-insulating HDPE pipe production device is applied to the above-mentioned heat-insulating HDPE pipe production process, comprising a bottom plate 1 and a side stand 3 fixedly arranged on the bottom plate 1, the bottom plate 1 and the side stand 3 are used to install various components, the side stand 3 is equipped with two feed rollers 4 through an adjustment mechanism, the gap between the two feed rollers 4 is used to feed the HDPE pipe, and the feeding action of the HDPE pipe is realized by controlling the rotation of the feed roller 4 so that the friction between the surface of the feed roller 4 and the HDPE pipe is realized, and the gap between the two feed rollers 4 can be adjusted by the adjustment mechanism, so that the feeding of HDPE pipes with different apertures can be realized, and the device has better practicality and universality;

[0052] After the HDPE pipe is fed to the required length through the feed roller 4, the HDPE pipe abuts against the fixed length mechanism arranged on the bottom plate 1, and the heat-insulating HDPE pipe production equipment further comprises a transmission rod 12 arranged on the side support 3 that is rotated by a power device. When the HDPE pipe abuts against the fixed length mechanism, the fixed length mechanism is used to control the cutting mechanism to separate the transmission rod 12 from the feed roller 4 to stop the feeding action of the HDPE pipe. At this time, the feeding of the HDPE pipe is automatically stopped without manual control, thereby improving the degree of automation when cutting the HDPE pipe;

[0053] After the feeding of the HDPE pipe is stopped, the automatic cutting action of the HDPE pipe is realized. A continuous transmission mechanism is also arranged on the transmission rod 12. When the transmission rod 12 is separated from the feeding roller 4 by the cutting mechanism, the continuous transmission mechanism is used to maintain the transmission action of the power device. The heat-insulating HDPE pipe production equipment also includes a lifting frame 7 slidably arranged on the side support 3 and a cutting mechanism installed on the lifting frame 7. The cutting mechanism is connected with the fixed length mechanism through a driving mechanism. When the HDPE pipe and the fixed length mechanism are against each other, the driving mechanism has two strokes. The first stroke: the fixed length mechanism pushes the driving mechanism to connect with the continuous transmission mechanism. The second stroke: the driving mechanism drives the cutting mechanism to press down to cut the HDPE pipe. At this time, the automatic fixed length and automatic cutting of the HDPE pipe are realized without manual control, thereby improving the overall convenience of use.

[0054] In one embodiment of the present invention, the fixed length mechanism includes a slide rail 23 installed on the bottom plate 1 and a two-way resistance rod 22 slidably installed in the slide rail 23 and fixedly connected to the side push block 2 on the surface. A rotating bracket 21 is arranged on the surface of the slide rail 23 by rotating through a torsion spring. When the HDPE pipe is continuously fed through the feed roller 4, the HDPE pipe gradually approaches the rotating bracket 21 until the end of the HDPE pipe abuts against the surface of the rotating bracket 21. At this time, due to the action of the feed roller 4, the HDPE pipe will abut against the rotating bracket 21, causing the rotating bracket 21 to rotate. When the rotating bracket 21 rotates, it will push the two-way resistance rod 22 to slide on the slide rail 23 through the side push block 2. At this time, one end of the two-way resistance rod 22 abuts against the cutting mechanism to separate the feed roller 4 from the cutting mechanism and stop feeding. At the same time, the other end abuts against the driving mechanism to connect it with the continuous transmission mechanism and pull the cutting mechanism downward under the drive of the continuous transmission driving mechanism to press down the HDPE pipe. The whole process is automated and has a better use effect.

[0055] In another embodiment of the present invention, the driving mechanism includes a mounting rotating rod 11 rotatably arranged on the bottom plate 1 and a plug-in rod 118 extending into the cavity of the mounting rotating rod 11 after penetrating the continuous transmission mechanism, the plug-in rod 118 is connected to the cavity surface of the mounting rotating rod 11 through a spring three 119, and a plurality of groups of cams 117 extending to the outside of the cavity of the mounting rotating rod 11 are fixedly arranged on the surface of the plug-in rod 118, and a push plate 117 fixedly connected to each other is slidably arranged on the outer surface of the mounting rotating rod 11 through a spring four 1110. 16 and the friction disc 115, the push plate 116 and the friction disc 115 are provided with grooves on their surfaces, and a protrusion adapted to the groove is fixedly provided on the surface of the mounting rotating rod 11, and the protrusion is clamped in the groove. After the HDPE pipe abuts against the surface of the rotating bracket 21, one end of the two-way abutting rod 22 abuts against the push plate 116, and at this time, the push plate 116 and the friction disc 115 move along the surface of the mounting rotating rod 11 toward the direction close to the continuous transmission mechanism until the friction disc 115 is docked with the continuous transmission mechanism;

[0056] The continuous transmission mechanism includes a worm 5 rotatably arranged on the side bracket 3 and a worm wheel 52 rotatably arranged on the side bracket 3 and connected to the worm 5. A synchronous belt 1 51 is installed between the worm 5 and the transmission rod 12 through a pulley. When the transmission rod 12 is rotated by the power device, the worm 5 can be rotated by the synchronous belt 1 51, so that the worm wheel 52 is rotated. A friction disk 1 53 is fixedly arranged on the surface of the worm wheel 52. When the friction disk 1 53 is docked with the friction disk 2 115, the friction force between the friction disk 1 53 and the friction disk 2 115, as well as the effect of the groove and the protrusion, realizes the rotation of the installation rotating rod 11 and the plug-in rod 118.

[0057] In another embodiment of the present invention, the cutting mechanism includes a cutting seat 9 mounted on the side support 3 through a spring 2 92 and a cutter 91 mounted on the cutting seat 9. The cutting machine 91 can be used to cut the HDPE pipe. The driving mechanism also includes a pulling wheel 2 114 rotatably mounted on the cutting seat 9. Two pulling wheels 1 112 are mounted on the outer peripheral side of the pulling wheel 2 114 through a pulling belt 113. The two pulling wheels 1 112 are rotatably mounted on a side plate 111 fixed to the bottom plate 1. When the mounting rod and the plug-in rod 118 rotate, the multiple groups of cams 117 also rotate together. When the cam 117 rotates, its protrusion pulls the cutting seat 9 downward, causing the spring 2 92 to compress and deform. At this time, the cutter 91 moves downward, and the HDPE pipe is cut by the rotating cutting blade. After the cam 117 rotates one circle, the cutter 91 completes the cutting of the HDPE pipe.

[0058] In another embodiment of the present invention, the cutting mechanism includes a driving disk 134 rotatably arranged on the side bracket 3, the transmission rod 12 is provided with a slot 13 on a side surface close to the driving disk 134, and a claw 131 whose one end part abuts against the surface of the slot 13 is rotatably arranged on the driving disk 134 through a torsion spring. When the claw 131 abuts against the surface of the slot 13, the transmission rod 12 drives the driving disk 134 to rotate, and an adaptive wheel 137 is slidably arranged on the surface of the side bracket 3 through a spring five 136. The adaptive wheel 137, the driving disk 134 and one of the feed rollers 4 are installed with a synchronous belt three 135 through a synchronous wheel. When the claw 131 abuts against the surface of the slot 13, the transmission rod 12 can drive the feed roller 4 to rotate through the synchronous belt three 135 to realize the feeding of the HDPE pipe. When the HDPE pipe is fed to the cutting length, the HDPE pipe abuts against the rotating bracket 21. The cutting mechanism also includes The screw rod 3 133 arranged on the side bracket 3 and the contact plate 132 threadedly installed on the screw rod 3 133 are rotated, and a gear 138 is fixedly arranged on the top port of the screw rod 3 133. A rack 139 fixedly connected to one end of the two-way contact rod 22 is slidably arranged on the top surface of the side bracket 3. One end of the two-way contact rod 22 pushes the rack 139 to move and rotates the gear 138 meshing with it. When the gear 138 rotates, the screw rod 3 133 rotates. At this time, the contact plate 132 threadedly connected to the screw rod 3 133 moves toward a position close to the claw 131. After the claw 131 rotates with the transmission rod 12 until the card turn contacts the contact plate 132, the contact plate 132 presses the card turn to deform the torsion spring on the card turn, and the claw 131 disengages from the card slot 13. At this time, the driving disk 134 is separated from the transmission rod 12, and the driving disk 134 stops rotating, thereby stopping the rotation of the feed roller 4, and the feeding stops at this time;

[0059] It should be noted here that when cutting the HDPE pipe, a certain margin will be left for the convenience of subsequent use, and the cutting will not be very precise. For example, if two meters of HDPE pipe is needed, only two meters of HDPE pipe will not be cut, but a few centimeters more will be cut to facilitate the subsequent splicing and processing of the HDPE pipe. Here, the HDPE pipe abuts against the rotating bracket 21. After the rotating bracket 21 rotates, the two-way interference rod 22 pushes the rack 139 and rotates to stop the feed roller 4. This process is the remaining cutting margin, not the cutting error. By adjusting the length of the two-way interference rod 22 and the initial position of the rack 139, the cutting margin can be controlled. For example, when the HDPE pipe just abuts against the rotating bracket 21 and the rotating bracket 21 just rotates, the two-way interference rod 22 just pushes the rack 139. When the movable rack 139 moves, the rack 139 makes the gear 138 rotate. In this case, the cutting margin is small, so the processing cost is low, but the error of subsequent processing cannot be too large. The advantage of increasing the cutting margin is that a larger subsequent processing error is allowed, but the cost will increase accordingly. Both methods are acceptable and can be adjusted according to actual conditions. It should be noted here that when adjusting the length of the two-way interference rod 22 and the position of the rack 139, it is necessary to ensure that when the rack 139 is meshed with the gear 138 and the feed roller 4 stops feeding the HDPE pipe, the other end of the two-way interference rod 22 must contact the push plate 116 to connect the friction disc 1 53 with the friction disc 2 115 to prevent the problem that the feeding stops and the friction disc 1 53 and the friction disc 2 115 are not connected, and the cutting action cannot be completed.

[0060] Among them, the power device is a main control motor 6 installed on the side stand 3, and the output shaft of the main control motor 6 and the transmission rod 12 are installed with a synchronous belt 2 8 through a synchronous wheel, so that the transmission rod 12 can be used as a power output through the main control motor 6 and the synchronous belt 2 8 to provide power for the feed roller 4 and the continuous transmission mechanism;

[0061] It should also be noted that in order to enable the claw 131 to smoothly overcome the friction with the surface of the slot 13 and disengage from it after the abutment plate 132 and the claw 131 abut against each other, the speed of the main control motor 6 should be lower than 100r / min to prevent the claw 131 from being unable to disengage from the slot 13 due to excessive speed, thereby causing damage to the equipment.

[0062] After the HDPE pipe is cut by the cutting machine 91, the cut HDPE pipe falls down, and the rotating bracket 21 is no longer under pressure, and the torsion spring on it recovers its deformation, pulling the two-way resistance rod 22 to return to its original position, and the rack 139 drives the rack 139 to rotate in the opposite direction, and the resistance plate 132 is separated from the claw 131, and the torsion spring on the claw 131 recovers its deformation, and the claw 131 is re-engaged in the slot 13, and the driving disc 134 is reconnected with the transmission rod 12, and at the same time, the two-way resistance rod 22 The other end of the spring 1110 is separated from the push plate 116, the spring 1110 is deformed again, the friction disc 1 53 is separated from the friction disc 115, the mounting rod 11 and the plug rod 118 stop rotating, the feed roller 4 resumes feeding, and the spring 112 is deformed again, the cutting machine 91 moves upward to the initial position, and reciprocates in this way, thereby continuously cutting the HDPE pipe to a fixed length, with high automation, no manual control required, and the cutting process in the entire HDPE pipe production process can be automatically completed, which has excellent practicality;

[0063] In another embodiment of the present invention, the adjustment mechanism includes two lifting and mounting blocks 41 slidably mounted on the side bracket 3, and the two feed rollers 4 are rotatably mounted on the two lifting and mounting blocks 41, wherein the lifting and mounting blocks 41 located at the bottom are provided with a cutting support plate 42. When the HDPE pipe is fed by the two feed rollers 4, the cutting support plate 42 is used to support the HDPE pipe so as to facilitate the cutting of the HDPE pipe by the cutting mechanism. The adjustment mechanism is used to control the movement of the two lifting and mounting blocks 41 to adjust the gap between the two feed rollers 4 so as to feed HDPE pipes of different diameters, thereby improving the universality of use. The adjustment mechanism also includes a lifting and mounting block 41 arranged on the side The adjusting motor 10 on the vertical bracket 3 and the screw rod 101 rotatably arranged on the side bracket 3 and threadedly connected with the two lifting mounting blocks 41, the screw rod 101 is a forward and reverse screw, and by starting the adjusting motor 10, the gap between the two lifting mounting blocks 41 on the screw rod 101 can be changed, so as to adjust the gap between the two feeding rollers 4 to realize the feeding of HDPE pipes of different diameters, and when the distance between the two lifting mounting blocks 41 changes, the cutting support plate 42 moves with the lifting mounting block 41 located below, so that when feeding HDPE pipes of different diameters, the lower surface of the HDPE pipe can be supported by the cutting support plate 42;

[0064] It should be noted here that after the spacing between the two feed rollers 4 is adjusted by the adjustment mechanism, in order to cooperate with the cutting machine 91 in cutting the HDPE pipe, since the height of the cutting support plate 42 changes when the gap between the two feed rollers 4 is adjusted, if the gap between the two feed rollers 4 increases, the cutting support plate 42 decreases, otherwise, the cutting support plate 42 rises. When the cutting support plate 42 rises, the end of the connecting rod 118 away from the mounting rotating rod 11 passes through the push plate 116, the friction plate 1 53, the friction plate 2 115 and the worm gear 52 and then contacts the inclined surface of the cutting support plate 42. The inclined surface of the cutting support plate 42 contacts the connecting rod 118, causing the spring 3 119 on the connecting rod 118 to be compressed and deformed, and the connecting rod 118 is more deeply inserted into the mounting rotating rod 11. As the connecting rod 118 goes deeper, the cam 117 in the pulling belt 113 changes, and the multiple groups of cams 117 move along the inclined surface as shown in the figure. Fig. 9 The direction from left to right gradually decreases, and the plug-in rod 118 is lifted into the installation rotating rod 11. At this time, the diameter of the cam 117 in the pulling belt 113 becomes larger, corresponding to the increase in the gap between the two feeding rollers 4. When the cam 117 rotates, it will pull the cutter 91 downward to a lower height, thereby completing the cutting of the HDPE pipe with a larger diameter. It should be noted that the size of the raised part of each cam 117 corresponds to each diameter of the HDPE pipe, but when corresponding to HDPE pipes of different diameters, the cam 117 The size of the raised portion should be slightly larger than the diameter of the HDPE pipe, ensuring that the cam 117 can complete the cutting of the HDPE pipe with one rotation. When cutting HDPE pipes of different diameters, the cam 117 diameter can be automatically switched by adjusting the distance between the two feed rollers 4 by adjusting the motor 10. When replacing HDPE pipes of different diameters, the cutting depth of the cutting machine 91 changes accordingly. Such a coordinated design is suitable for promotion and use, and the fixed length and stopped cutting of the HDPE pipe can be completed by the design of a single main control motor 6, which is extremely practical.

[0065] In order to further improve the stability of the HDPE pipe during cutting, the heat-insulating HDPE pipe production equipment further includes a stabilizing mechanism, which is connected to the cutting mechanism through a synchronous belt 14. When the feed roller 4 is separated from the transmission rod 12 and the feed is stopped, the stabilizing mechanism is pressed down so that the HDPE pipe is pressed against the surface of the cutting support plate 42 to achieve stable cutting of the HDPE pipe.

[0066] In another embodiment of the present invention, the stabilizing mechanism includes a connecting seat 72 fixedly arranged on the lifting frame 7, and the connecting seat 72 is equipped with a stabilizing pressure plate 73 through a spring 74. A screw rod 71 threadedly connected to the lifting frame 7 is rotatably arranged on the side bracket 3, and a synchronous belt 414 is installed between the end of the screw rod 71 and the rotating shaft of the gear 138 through a synchronous wheel. When the rack 139 is engaged with the gear 138 and the gear 138 is rotated, the screw rod 71 is rotated through the synchronous belt 414, so that the lifting frame 7 moves on the screw rod 71 through the threaded connection with the screw rod, thereby driving the stabilizing pressure plate 73 on the connecting seat 72 to press down, causing the spring 74 to deform, and through the reaction force of the deformation of the spring 74, the HDPE pipe is pressed on the surface of the cutting support plate 42 to prevent excessive shaking during cutting.

[0067] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A thermal insulation HDPE pipe production process, characterized in that: The steps include: Step 1: 80% high-density polyethylene, 3% conductive carbon black, 5% chlorinated polyethylene, 8% microporous foaming agent, 3% titanium dioxide, 3% decabromodiphenyl ether, 2% antimony trioxide, 0.5% benzophenone, 0.5% 2,6-tert-butyl-4-methylphenol, and 3% diatomaceous earth are fully mixed in a high-speed mixer; Step 2: The mixed materials are fed into a twin-screw extruder for melt extrusion under high temperature and high pressure. During the extrusion process, the microporous foaming agent is evenly distributed in the molten HDPE matrix and produces tiny bubbles to form a microporous structure; Step 3: The extruded pipe is quickly cooled and shaped by the cooling system, and the pipe is cut to a fixed length by the cutting equipment according to the required length; Step 4: Package the qualified pipes, mark the production date, specification model, production batch and other information, and then store them in warehouse.

2. A heat-insulating HDPE pipe production equipment, applied to a heat-insulating HDPE pipe production process according to claim 1, characterized in that: The invention comprises a bottom plate (1) and a side support (3) fixedly arranged on the bottom plate (1), wherein the side support (3) is provided with two feeding rollers (4) via an adjusting mechanism, wherein the gap between the two feeding rollers (4) is used for feeding HDPE pipes, and the adjusting mechanism is used for controlling the gap distance between the two feeding rollers (4) to achieve feeding of HDPE pipes of different diameters, and is characterized in that it also comprises: A length fixing mechanism is arranged on the bottom plate (1), and when the HDPE pipe is fed to an appropriate length by the feed roller (4), the HDPE pipe abuts against the length fixing mechanism; A driving rod (12) arranged on the side support (3) is rotated by a power device, and the driving rod (12) is connected to one of the feed rollers (4) through a cutting mechanism, and the cutting mechanism is also connected to a length fixing mechanism. When the HDPE pipe abuts against the length fixing mechanism, the length fixing mechanism is used to control the cutting mechanism to separate the driving rod (12) from the feed roller (4) to stop the feeding action of the HDPE pipe.

3. The heat-insulating HDPE pipe production equipment according to claim 2, characterized in that: The transmission rod (12) is also provided with a continuous transmission mechanism. When the transmission rod (12) is separated from the feed roller (4) by the cutting mechanism, the continuous transmission mechanism is used to maintain the transmission action of the power device. The heat-insulating HDPE pipe production equipment also includes a lifting frame (7) slidably arranged on the side support (3) and a cutting machine (91) mechanism installed on the lifting frame (7). The cutting machine (91) mechanism is connected to the fixed length mechanism through a driving mechanism. When the HDPE pipe and the fixed length mechanism are against each other, the driving mechanism has two strokes. In the first stroke, the fixed length mechanism pushes the driving mechanism to connect with the continuous transmission mechanism. In the second stroke, the driving mechanism drives the cutting machine (91) mechanism to press down to cut the HDPE pipe.

4. The heat-insulating HDPE pipe production equipment according to claim 2, characterized in that: The adjustment mechanism comprises two lifting mounting blocks (41) slidably mounted on the side brackets (3); the two feed rollers (4) are rotatably mounted on the two lifting mounting blocks (41), wherein a cutting support plate (42) is provided on the lower lifting mounting block (41); when the HDPE pipe is fed through the two feed rollers (4), the cutting support plate (42) is used to support the HDPE pipe so as to facilitate the cutting of the HDPE pipe by the cutting machine (91); the adjustment mechanism is used to control the movement of the two lifting mounting blocks (41) to adjust the gap between the two feed rollers (4) so ​​as to feed HDPE pipes of different diameters.

5. The heat-insulating HDPE pipe production equipment according to claim 4, characterized in that: The heat-insulating HDPE pipe production equipment also includes a stabilizing mechanism, which is connected to the cutting mechanism via a synchronous belt 4 (14). When the feed roller (4) is separated from the transmission rod (12) and the feed is stopped, the stabilizing mechanism is pressed downward so that the HDPE pipe is pressed against the surface of the cutting support plate (42) to achieve stable cutting of the HDPE pipe.

6. The heat-insulating HDPE pipe production equipment according to claim 5, characterized in that: The length fixing mechanism comprises a slide rail (23) mounted on a bottom plate (1) and a bidirectional abutment rod (22) slidably mounted in the slide rail (23) and fixedly connected to a side push block (2) on its surface; a rotating bracket (21) is provided on the surface of the slide rail (23) for rotation via a torsion spring; when the HDPE pipe abuts against the surface of the rotating bracket (21), the bidirectional abutment rod (22) is used to control the cutting mechanism to stop feeding the HDPE pipe, while connecting the driving mechanism with the continuous transmission mechanism so that the cutting mechanism (91) is pressed down to cut the HDPE pipe.

7. The heat-insulating HDPE pipe production equipment according to claim 6, characterized in that: The driving mechanism comprises a mounting rotating rod (11) rotatably arranged on the bottom plate (1) and a plug-in rod (118) which extends into the cavity of the mounting rotating rod (11) after penetrating the continuous transmission mechanism; the plug-in rod (118) is connected to the cavity surface of the mounting rotating rod (11) via a spring three (119), and a plurality of groups of cams (117) extending to the outside of the cavity of the mounting rotating rod (11) are fixedly arranged on the surface of the plug-in rod (118); a push plate (116) and a friction disk two (115) which are fixedly connected to each other are slidably arranged on the outer surface of the mounting rotating rod (11) via a spring four (1110); after the HDPE pipe abuts against the surface of the rotating bracket (21), one end of the bidirectional abutting rod (22) abuts against the push plate (116) to make the friction disk two (115) dock with the continuous transmission mechanism; The continuous transmission mechanism comprises a worm (5) rotatably arranged on the side bracket (3) and a worm wheel (52) rotatably arranged on the side bracket (3) and transmission-connected to the worm (5); a synchronous belt (51) is installed between the worm (5) and the transmission rod (12) via a pulley; a friction disc (53) is fixedly arranged on the surface of the worm wheel (52); when the friction disc (53) and the friction disc (115) are docked, the rotation of the mounting rotating rod (11) and the plug-in rod (118) is realized; and one end of the plug-in rod (118) away from the mounting rotating rod (11) passes through the push plate (116), the friction disc (53), the friction disc (115) and the worm wheel (52) and then contacts the inclined surface of the cutting support plate (42).

8. The heat-insulating HDPE pipe production equipment according to claim 7, characterized in that: The cutting mechanism comprises a cutting seat (9) mounted on a side support (3) via a second spring (92) and a cutting machine (91) mounted on the cutting seat (9); the driving mechanism also comprises a second pulling wheel (114) rotatably mounted on the cutting seat (9); two pulling wheels (112) are mounted on the outer peripheral side of the second pulling wheel (114) via a pulling belt (113); and the two pulling wheels (112) are rotatably mounted on a side plate (111) fixed on a bottom plate (1); when the plug-in rod (118) rotates, the cam (117) contacts the pulling belt (113) to pull the second pulling wheel (114) downward, thereby realizing a downward pressing cutting action of the cutting machine (91).

9. The heat-insulating HDPE pipe production equipment according to claim 8, characterized in that: The cutting mechanism comprises a driving disk (134) rotatably arranged on the side support (3); a slot (13) is provided on a surface of a side of the driving disk (134) of the transmission rod (12); a claw (131) is rotatably arranged on the driving disk (134) through a torsion spring, and one end of the claw (131) abuts against the surface of the slot (13); when the claw (131) abuts against the surface of the slot (13), the transmission rod (12) drives the driving disk (134) to rotate; an adaptive wheel (137) is slidably arranged on the surface of the side support (3) through a spring five (136); and a synchronous belt three (135) is installed on the adaptive wheel (137), the driving disk (134) and one of the feed rollers (4) through a synchronous wheel; The cutting mechanism also includes a screw rod three (133) rotatably arranged on the side support (3), and a contact plate (132) threadedly mounted on the screw rod three (133); a gear (138) is fixedly arranged on the top end of the screw rod three (133); a rack (139) fixedly connected to one end of the bidirectional contact rod (22) is slidably arranged on the top surface of the side support (3); when the HDPE pipe abuts against the surface of the rotating support (21), the rack (139) meshes with the gear (138).

10. The heat-insulating HDPE pipe production equipment according to claim 9, characterized in that: The stabilizing mechanism comprises a connecting seat (72) fixedly arranged on the lifting frame (7), the connecting seat (72) being provided with a stabilizing pressure plate (73) via a spring (74), a screw rod (71) being rotatably arranged on the side bracket (3) and being threadedly connected to the lifting frame (7), and a synchronous belt (14) being installed between the end of the screw rod (71) and the rotating shaft of the gear (138) via a synchronous wheel.

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