Plastic pipe extrusion cooling device

Abstract

The present invention is applicable to the field of pipe forming technology, and provides a plastic pipe extrusion cooling device, including a device box, a cooling cylinder, a collecting tank, a drain pipe and a circulating cooling system. The cooling cylinder is composed of two semicircular cylinders and further includes: a rotary control component, a spray component, a rotary control component, a suspension component and a rotating body. The two ends of the suspension component are respectively provided with a magnetic component A and a magnetic component B, and a spiral guide groove is provided on the outer wall of the rotating body. A plastic pipe extrusion cooling device in the present invention, the rotary control component, the rotating component, the suspension component, the spray component and the rotating body cooperate with each other to perform water cooling on the outer wall of the plastic pipe and air cooling on the inner wall of the plastic pipe. This combined cooling method can not only significantly shorten the entire cooling and cooling cycle, but also help reduce the deformation and stress concentration of the pipe caused by the large temperature difference between the inner and outer walls, and improve the stability of the formed size and mechanical properties of the plastic pipe.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline forming, and in particular relates to a plastic pipe extrusion cooling device. Background Art

[0002] Plastic pipes are a material widely used in industry, construction, and everyday life. They are favored for their lightweight, corrosion-resistant, and low-cost advantages. Extrusion is a key step in the production of plastic pipes, and proper cooling of the pipes during this process is crucial. Effective cooling can significantly improve the quality and performance of the final product.

[0003] The existing plastic pipe extrusion cooling device can switch freely between rapid cooling or gradual cooling, and has good versatility. When the telescopic rod is in the extended state, the spacer ring divides the cooling chamber into three cooling chambers. At this time, the cooling temperature of each chamber is different, and the temperature is gradually reduced. When the telescopic rod is in the retracted state, a rapid cooling chamber is formed, and the rapid cooling state is entered at this time, thereby realizing gradual cooling and rapid cooling of the plastic pipe, meeting the cooling needs of the plastic pipe.

[0004] Although the existing plastic pipe extrusion cooling device can cool the pipe, it mainly cools the outer wall of the plastic pipe, while the inner wall cannot be effectively cooled at the same time. This uneven cooling method leads to a large temperature difference between the inner and outer walls of the plastic pipe, which easily causes stress concentration problems, thereby affecting the molding quality of the plastic pipe.

[0005] Therefore, in view of the above status quo, there is an urgent need to develop a plastic pipe extrusion cooling device to overcome the shortcomings in current practical applications. Summary of the Invention

[0006] In view of the deficiencies in the prior art, an object of the embodiments of the present invention is to provide a plastic pipe extrusion cooling device to solve the problems in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A plastic pipe extrusion cooling device includes a device box, on which a plurality of cooling cylinders are distributed, each of which is composed of two semicircular cylinders, and a collection trough for collecting cooling liquid is opened on the inner wall of the semicircular cylinder at the bottom, a drainage pipe extending to the outside of the cooling cylinder is fixed to the bottom of the collection trough, and the drainage pipe is connected to a circulating cooling system fixed in the device box through a connecting hose, and the cooling cylinder located at the starting end of the device box cooperates with the extrusion die on the extruder, and the cooling cylinder located at the end of the device box cooperates with the cutting device and the winding device of the plastic pipe, and further includes:

[0009] A rotary control assembly is provided at both ends of the cooling cylinder and is connected to the inner walls of the cooling cylinder through bearings. A water inlet pipe connected to the circulating cooling system is installed on the rotary control assembly. A spray assembly is provided between the two rotary control assemblies. The spray assembly is connected to the water inlet pipe thereon through the rotary control assembly. One end of the spray assembly is located inside the rotary control assembly and is fixedly connected to the inner wall thereof. The other end of the spray assembly is provided between the two rotary control assemblies. Fixed grooves are equidistantly distributed on the inner wall of the rotary control assembly.

[0010] A rotating assembly is fixed on the device box, and the distribution number of the rotating assemblies is consistent with the distribution number of the cooling cylinder, and the output end of the rotating assembly is fixedly connected to the outer wall of one end of the rotary control assembly;

[0011] A suspension assembly is symmetrically arranged inside the rotary control assembly, with magnetic components A and B respectively provided at both ends of the suspension assembly. The magnetic component A is circumferentially distributed on one end of the suspension assembly, and the magnetic component B is installed in a fixed groove. The magnetic components A and B repel each other due to their like polarity. A rotating body is installed between the two suspension assemblies in the same rotary control assembly, and a spiral guide groove is provided on the outer wall of the rotating body.

[0012] The plastic tube is extruded through the extrusion die and moves toward the inside of the rotary control assembly. The plastic tube is fully exposed to the spray area of ​​the spray assembly. The rotating body is located inside the plastic tube. The rotating assembly drives the rotary control assembly to rotate, and the rotary control assembly drives the spray assembly to rotate. The spray assembly quickly cools the outer wall of the plastic tube by rotating.

[0013] The rotary control component drives the magnetic component A to rotate through the magnetic component B. The magnetic component A drives the rotating body to rotate through the suspension component. The rotating body drives the spiral guide groove to rotate. The spiral guide groove in the rotating state drives the airflow to spiral and make it surge rapidly toward the direction close to the extrusion mold. The extrusion mold blocks the spiral airflow and makes it surge close to the inner wall of the plastic pipe. The blocked spiral airflow surges along the inner wall of the plastic pipe and achieves rapid cooling and rapid cooling of the inner wall of the plastic pipe.

[0014] As a further technical solution of the present invention, the magnetic parts A and B preferably use arc-shaped magnets with good magnetic properties, and the distribution quantity and distribution position of the two are consistent. The magnetic properties of the magnetic parts A and B on the end surfaces close to each other are the same.

[0015] As a further technical solution of the present invention, the rotary control assembly includes:

[0016] One end of the main rotating sleeve extends into the cooling cylinder, the outer wall of one end of the main rotating sleeve is connected to the inner wall of the cooling cylinder through a bearing, and the inner wall of the main rotating sleeve is circumferentially distributed with fixed grooves;

[0017] A secondary rotating sleeve is fixedly connected to the other end of the main rotating sleeve by bolts, the outer wall of the secondary rotating sleeve is connected to the rotating assembly, and the end surfaces of the main rotating sleeve and the secondary rotating sleeve close to each other are provided with a mounting groove and a water inlet groove, and the mounting groove is connected to the water inlet groove, the inner circumference of the main rotating sleeve is provided with a water guide groove connected to the water inlet groove, and one end of the main rotating sleeve is provided with a connecting groove that matches the water guide groove, the connecting groove is used for installing the spray assembly, and the water guide groove is connected to the spray assembly; and

[0018] An arc-shaped partition is located between the main rotating sleeve and the auxiliary rotating sleeve. The arc-shaped partition is rotatably set in the installation groove. One end of the arc-shaped partition is slidably installed on the device box through a slider. A water inlet pipe connected to the water inlet trough is provided on the arc-shaped partition, and one end of the water inlet pipe is connected to the circulating cooling system.

[0019] As a further technical solution of the present invention, the rotating assembly includes:

[0020] A motor fixed to the device box;

[0021] Rotate a rotating shaft mounted on the device box, wherein the rotating shaft is fixedly connected to the output end of the motor;

[0022] Installing gear A on the rotating shaft; and

[0023] A gear B is provided on the outer wall of the auxiliary rotating sleeve and meshes with gear A.

[0024] As a further technical solution of the present invention, the suspension assembly includes:

[0025] a mounting shaft located inside the main rotating sleeve; and

[0026] An annular sleeve is installed on the mounting shaft, and two annular sleeves are provided at both ends of the mounting shaft. A rotating body is installed between the two annular sleeves located at the same end. Grooves are distributed circumferentially on the annular sleeve, and the grooves are used for installing the magnetic component A.

[0027] As a further technical solution of the present invention, the spray assembly includes:

[0028] Nozzles A are distributed on the inner wall of the main rotating sleeve, the nozzles A are located on both sides of the magnetic element B, and one end of the nozzles A is connected to the water guide groove in the main rotating sleeve; and

[0029] The spray unit is located inside the cooling cylinder, and both ends of the spray unit are connected to the main rotating sleeves at both ends of the cooling cylinder and are connected to the water guide groove in the main rotating sleeve. The output ends of the spray unit and spray A are both facing the outer wall of the plastic pipe.

[0030] As a further technical solution of the present invention, the spray unit includes:

[0031] A delivery pipe located inside the cooling cylinder, with water outlet holes evenly distributed on the delivery pipe;

[0032] Connecting plates fixed on both ends of the delivery pipe, the connecting plates are locked in the connecting grooves by bolts, and the delivery pipe is connected to the guide grooves through the connecting plates;

[0033] Connecting sleeves equidistantly distributed on the delivery pipe, the connecting sleeves matching the water outlet holes; and

[0034] A spray head B is fixed on one side of the connecting sleeve and is in communication with the connecting sleeve, and faces the outer wall of the plastic pipe.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] The rotating assembly drives the rotary control assembly to rotate, and the rotary control assembly drives the spray assembly, the suspension assembly and the rotating body to rotate at the same time. The spray assembly can quickly cool down and cool the outer wall of the plastic pipe, so that it can be quickly shaped, ensuring the production efficiency and production quality of the plastic pipe. The rotating body can drive the airflow to spiral and surge rapidly toward the direction close to the extrusion mold by driving the spiral guide groove to rotate. The extrusion mold blocks the spiral airflow and makes it surge close to the inner wall of the plastic pipe. The blocked spiral airflow can surge along the inner wall of the plastic pipe and surge out through the other end of the plastic pipe. At the same time, due to the movement characteristics of the spiral flow, the airflow will generate a forward thrust along the axis of the pipe. This thrust will prompt the airflow to move quickly toward one end of the pipe, which can accelerate the circulation rate of the air inside the pipe, thereby achieving rapid cooling and rapid cooling of the inner wall of the plastic pipe.

[0037] Therefore, the outer wall of the plastic pipe is quickly cooled and cooled by circulating cooling liquid, and the inner wall of the plastic pipe is quickly cooled and cooled by gas flow. This combined cooling method can not only significantly shorten the entire cooling and cooling cycle, accelerate the molding rate and production rate of the plastic pipe, but also help reduce the deformation and stress concentration of the pipe caused by the large temperature difference between the inner and outer walls, and improve the stability of the molding size and mechanical properties of the plastic pipe. At the same time, compared with the use of water cooling or air cooling alone, this combined cooling method can also save resources more effectively, achieve the function of cooling and increasing efficiency, and make the molded plastic pipe have a better visual effect.

[0038] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a structural schematic diagram of the plastic pipe extrusion cooling device provided by an embodiment of the present invention from a first perspective.

[0040] Figure 2 This is a structural schematic diagram of the plastic pipe extrusion cooling device provided by an embodiment of the present invention from a second perspective.

[0041] Figure 3 for Figure 1 Enlarged view of the structure of the cooling cylinder, rotary control assembly and rotating assembly.

[0042] Figure 4 for Figure 3 Exploded diagram of the structure of the central rotation control assembly.

[0043] Figure 5 for Figure 3 Structural cross-sectional view of the cooling cylinder, rotary control assembly and rotating assembly.

[0044] Figure 6 for Figure 5 Enlarged view of the structure of the mid-suspension assembly and the rotating body.

[0045] Figure 7 for Figure 5 Schematic diagram of the working of the central suspension component and the rotating body in the plastic tube.

[0046] Figure 8 for Figure 5 A magnified view of the structure in the middle.

[0047] Figure 9 for Figure 8 Schematic diagram of the structure of the spray unit.

[0048] Figure 10 for Figure 5 A magnified view of the structure at B in the middle.

[0049] Reference numerals: 100 - device box, 200 - cooling cylinder, 210 - collecting tank, 220 - drain pipe, 300 - rotary control assembly, 310 - main rotating sleeve, 320 - auxiliary rotating sleeve, 330 - arc partition, 340 - mounting groove, 350 - water inlet groove, 360 - water guide groove, 370 - fixing groove, 380 - water inlet pipe, 390 - connecting groove, 400 - rotating assembly, 410 - motor, 420 - rotating shaft, 43 0-Gear A, 440-Gear B, 500-Suspension assembly, 510-Mounting shaft, 520-Annular sleeve, 530-Magnetic component A, 540-Magnetic component B, 600-Spray assembly, 610-Spray head A, 620-Spray unit, 621-Connecting plate, 622-Delivery pipe, 623-Water outlet, 624-Connecting sleeve, 625-Spray head B, 700-Rotating body, 710-Spiral guide groove, 800-Bearing. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0051] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0052] like Figures 1 to 8 As shown, a plastic pipe extrusion cooling device provided as an embodiment of the present invention includes a device box 100, on which a plurality of cooling cylinders 200 are distributed. The plurality of cooling cylinders 200 are each composed of two semicircular cylinders, and a collection tank 210 for collecting cooling liquid is provided on the inner wall of the semicircular cylinder at the bottom. A drainage pipe 220 extending to the outside of the cooling cylinder 200 is fixed to the bottom of the collection tank 210. The drainage pipe 220 is connected to a circulating cooling system fixed in the device box 100 through a connecting hose, and the cooling cylinder 200 located at the starting end of the device box 100 cooperates with the extrusion die on the extruder, and the cooling cylinder 200 located at the end of the device box 100 cooperates with a cutting device or a winding device for the plastic pipe. The device also includes:

[0053] The rotary control components 300 are distributed at both ends of the cooling cylinder 200 and are respectively connected to the inner walls of the cooling cylinder 200 at both ends through bearings 800. The rotary control components 300 are installed with a water inlet pipe 380 connected to the circulating cooling system. A spray component 600 is provided between the two rotary control components 300. The spray component 600 is connected to the water inlet pipe 380 on the rotary control components 300 through the rotary control components 300. One end of the spray component 600 is located inside the rotary control component 300 and fixedly connected to the inner wall thereof. The other end of the spray component 600 is distributed between the two rotary control components 300. Fixed grooves 370 are evenly distributed on the inner wall of the rotary control components 300.

[0054] The rotating assembly 400 is fixed to the device box 100, and the number of the rotating assemblies 400 is consistent with the number of the cooling cylinder 200. The output end of the rotating assembly 400 is fixedly connected to the outer wall of one end of the rotary control assembly 300;

[0055] The suspension assembly 500 is symmetrically arranged inside the rotation control assembly 300. A magnetic component A530 and a magnetic component B540 are respectively provided at both ends of the suspension assembly 500. The magnetic component A530 is circumferentially distributed on one end of the suspension assembly 500. The magnetic component B540 is installed in the fixing groove 370. The magnetic components A530 and B540 repel each other in the same manner. A rotating body 700 is installed between the two suspension assemblies 500 in the same rotation control assembly 300. The outer wall of the rotating body 700 is provided with a spiral guide groove 710.

[0056] The plastic tube is extruded through the extrusion die and moves toward the interior of the rotary control assembly 300, so that the outer wall of the plastic tube is fully exposed to the spraying area of ​​the spray assembly 600. The rotating body 700 is located inside the plastic tube. The rotating assembly 400 drives the rotary control assembly 300 to rotate, and the rotary control assembly 300 drives the spray assembly 600 to rotate. The spray assembly 600 can quickly cool the outer wall of the plastic tube by rotating, so that it is quickly shaped, thereby ensuring the production efficiency and production quality of the plastic tube.

[0057] The rotary control component 300 drives the magnetic component A530 to rotate through the magnetic component B540, and the magnetic component A530 drives the rotating body 700 to rotate through the suspension component 500, and the rotating body 700 drives the spiral guide groove 710 to rotate. The spiral guide groove 710 in the rotating state can drive the airflow to spiral and make it surge rapidly toward the direction close to the extrusion mold, and the extrusion mold blocks the spiral airflow and makes it surge close to the inner wall of the plastic pipe. The blocked spiral airflow can surge along the inner wall of the plastic pipe and surge out through the other end of the plastic pipe. At the same time, due to the movement characteristics of the spiral flow, the airflow will generate a forward thrust along the axis of the pipe. This thrust will prompt the airflow to move rapidly toward one end of the pipe, which can accelerate the circulation rate of the air inside the pipe, thereby achieving rapid cooling and rapid cooling of the inner wall of the plastic pipe.

[0058] Therefore, the outer wall of the plastic pipe is quickly cooled and cooled by circulating cooling liquid, and the inner wall of the plastic pipe is quickly cooled and cooled by gas flow. This combined cooling method can not only significantly shorten the entire cooling and cooling cycle, accelerate the molding rate and production rate of the plastic pipe, but also help reduce the deformation and stress concentration of the pipe caused by the large temperature difference between the inner and outer walls, and improve the stability of the molding size and mechanical properties of the plastic pipe. At the same time, compared with the use of water cooling or air cooling alone, this combined cooling method can also save resources more effectively, achieve the function of cooling and increasing efficiency, and make the molded plastic pipe have a better visual effect.

[0059] like Figures 3 to 8 As shown, as a preferred embodiment of the present invention, the magnetic component A530 and the magnetic component B540 preferably adopt an arc-shaped magnet with good magnetic properties, and the distribution quantity and distribution position of the two are consistent, so as to ensure that the suspension component 500 and the rotating body 700 can be effectively placed inside the rotation control component 300, thereby allowing the plastic tube to effectively and quickly enter the space between the suspension component 500 and the rotation control component 300. At the same time, the magnetic component A530 and the magnetic component B540 can also adopt electromagnets that meet the use conditions.

[0060] like Figures 3 to 8As shown, as a preferred embodiment of the present invention, the rotation control component 300 includes a main rotating sleeve 310, a secondary rotating sleeve 320, an arc-shaped partition 330, a mounting groove 340, a water inlet groove 350, a water guide groove 360 ​​and a connecting groove 390, one end of the main rotating sleeve 310 extends into the cooling cylinder 200, and the outer wall of one end of the main rotating sleeve 310 is connected to the inner wall of the cooling cylinder 200 through a bearing 800, the other end of the main rotating sleeve 310 is fixed with the secondary rotating sleeve 320 by bolts, the outer wall of the secondary rotating sleeve 320 is connected to the rotating component 400, the main rotating sleeve 310 and the secondary rotating sleeve 320 are provided with mounting grooves 340 and water inlet grooves 350 on the end surfaces close to each other, and the mounting grooves 340 are connected to the water inlet groove 350, the arc-shaped partition 330 The partition 330 is located between the main rotating sleeve 310 and the auxiliary rotating sleeve 320 and is rotatably arranged in the installation groove 340. One end of the arc-shaped partition 330 is slidably installed on the device box 100 through a slider. The arc-shaped partition 330 is provided with a water inlet pipe 380 connected to the water inlet groove 350. One end of the water inlet pipe 380 is connected to the circulating cooling system. The interior of the main rotating sleeve 310 is circumferentially distributed with a water guide groove 360 ​​connected to the water inlet groove 350, and one end of the main rotating sleeve 310 is provided with a connecting groove 390 that cooperates with the water guide groove 360. The connecting groove 390 is used for the installation of the spray assembly 600, and the water guide groove 360 ​​is connected to the spray assembly 600. The inner wall of the main rotating sleeve 310 is circumferentially distributed with a fixing groove 370.

[0061] In this embodiment, when the main rotating sleeve 310 and the auxiliary rotating sleeve 320 are fastened together as a whole by bolts, the mounting grooves 340 on the two can clamp the arc-shaped partition 330 so that it is stably placed in the mounting grooves 340. The main rotating sleeve 310, the auxiliary rotating sleeve 320 and the arc-shaped partition 330 can seal the water inlet groove 350. The circulating cooling system guides the cooling liquid into the water inlet groove 350 through the water inlet pipe 380, and then guides the cooling liquid from the water inlet groove 350 to the water guide groove 360. Finally, the cooling liquid is transported to the spray assembly 600 through the water guide groove 360, and then sprayed onto the outer wall of the plastic pipe by the spray assembly 600, thereby cooling and lowering the temperature of the outer wall of the plastic pipe and quickly shaping it.

[0062] The ends of the main rotating sleeve 310 and the auxiliary rotating sleeve 320 away from the arc-shaped partition 330 are concave and convex, which not only ensures the sealing of the connection between the two, but also can accurately locate the docking position of the installation grooves 340 on the two, so that the arc-shaped partition 330 can effectively and accurately cooperate with the installation groove 340, further improving the sealing performance of the water inlet groove 350.

[0063] In a preferred embodiment, the main rotating sleeve 310 , the auxiliary rotating sleeve 320 and the arc-shaped partition 330 are preferably in a circular ring structure.

[0064] like Figures 1 to 6 As shown, as a preferred embodiment of the present invention, the rotating assembly 400 includes a motor 410, a rotating shaft 420, a gear A430 and a gear B440. The motor 410 is fixed on the device box 100. The rotating shaft 420 is fixed to the output end of the motor 410. The rotating shaft 420 is rotatably mounted on the device box 100. The gear A430 is installed on the rotating shaft 420. The gear A430 is engaged with the gear B440 fixed on the outer wall of the auxiliary rotating sleeve 320.

[0065] In this embodiment, the motor 410 drives the rotating shaft 420 to rotate, the rotating shaft 420 drives the gear A430 to rotate, the gear A430 drives the auxiliary rotating sleeve 320 to rotate through the gear B440, the auxiliary rotating sleeve 320 drives the main rotating sleeve 310 to rotate, the arc-shaped partition 330 is in a stationary state, and the main rotating sleeve 310 can drive the spray assembly 600 to rotate through the connecting groove 390. The spray assembly 600 can quickly cool and cool the outer wall of the plastic pipe by rotating, so that it is quickly shaped, thereby ensuring the production efficiency and production quality of the plastic pipe;

[0066] At the same time, the main rotating sleeve 310 can drive the magnetic component B540 in the fixed groove 370 to rotate, the magnetic component B540 drives the magnetic component A530 to rotate, the magnetic component A530 drives the rotating body 700 to rotate through the suspension component 500, and the rotating body 700 drives the spiral guide groove 710 to rotate. The spiral guide groove 710 in the rotating state can drive the airflow to spiral and make it surge quickly toward the direction close to the extrusion mold, which can accelerate the circulation rate of the air inside the pipeline, thereby achieving rapid cooling and rapid cooling of the inner wall of the plastic pipe.

[0067] like Figures 2 to 8 As shown, as a preferred embodiment of the present invention, the suspension component 500 includes a mounting shaft 510 and an annular sleeve 520. The mounting shaft 510 is located inside the main rotating sleeve 310. Two annular sleeves 520 are installed at both ends of the mounting shaft 510. A rotating body 700 is installed between the two annular sleeves 520 located at the same end. Grooves are distributed circumferentially on the annular sleeve 520, and the grooves are used for installing the magnetic suction component A530.

[0068] In this embodiment, when the magnetic component B540 rotates, the magnetic component B540 drives the annular sleeve 520 to rotate through the magnetic component A530, and the annular sleeve 520 drives the rotating body 700 to rotate in the plastic tube, thereby achieving rapid cooling of the inner wall of the plastic tube.

[0069] In a preferred embodiment, the annular sleeve 520 preferably adopts an annular block structure, and the annular sleeve 520 and the main rotating sleeve 310 are both made of a non-magnetic material to avoid magnetic interference with the magnetic attraction component B540 and the magnetic attraction component A530.

[0070] like Figures 3 to 10 As shown, as a preferred embodiment of the present invention, the spray assembly 600 includes a spray head A610 and a spray unit 620, the spray head A610 is distributed on the inner wall of the main rotating sleeve 310 and is located on both sides of the magnetic suction component B540, one end of the spray head A610 is connected to the water guide groove 360 ​​in the main rotating sleeve 310, the spray unit 620 is located inside the cooling cylinder 200, the two ends of the spray unit 620 are respectively connected to the main rotating sleeves 310 at both ends of the cooling cylinder 200 and are connected to the water guide groove 360 ​​in the main rotating sleeve 310, the spray unit 620 and the output end of the spray A are both facing the outer wall of the plastic pipe.

[0071] In this embodiment, when the main rotating sleeve 310 rotates, the main rotating sleeve 310 simultaneously drives the nozzle A610 and the spray unit 620 to rotate synchronously. The nozzle A610 can cooperate with the spray unit 620 to spray the cooling liquid in the water guide groove 360 ​​evenly and fully onto the outer wall of the plastic pipe, thereby achieving rapid cooling and rapid cooling of the inner wall of the plastic pipe, allowing it to be quickly molded, and improving the molding efficiency and molding quality of the plastic pipe.

[0072] like Figures 3 to 10 As shown, as a preferred embodiment of the present invention, the spray unit 620 includes a connecting plate 621, a delivery pipe 622, a water outlet 623, a connecting sleeve 624 and a nozzle B625. The delivery pipe 622 is located inside the cooling cylinder 200, and connecting plates 621 are fixed at both ends of the delivery pipe 622. The connecting plate 621 is locked in the connecting groove 390 by bolts. The delivery pipe 622 is connected to the guide groove. Water outlet holes 623 and connecting sleeves 624 are equidistantly distributed on the delivery pipe 622. The connecting sleeve 624 cooperates with the water outlet hole 623, and a nozzle B625 is fixed on one side of the connecting sleeve 624. The nozzle B625 faces the outer wall of the plastic pipe.

[0073] In this embodiment, the main rotating sleeve 310 drives the delivery pipe 622 to rotate through the connecting plate 621, and the delivery pipe 622 drives the connecting sleeve 624 and the nozzle B625 to rotate. The cooling liquid in the guide groove is guided to the delivery pipe 622, so that the nozzle B625 can spray the cooling liquid in the delivery pipe 622 evenly and fully onto the outer wall of the plastic pipe during the rotation process, thereby achieving rapid cooling and rapid cooling of the inner wall of the plastic pipe, enabling it to be quickly molded, and improving the molding efficiency and molding quality of the plastic pipe.

[0074] In a preferred embodiment, the connecting sleeve 624 is fixed to the outer wall of the delivery pipe 622 by a top screw, and the number and distribution position of the connecting sleeve 624 are consistent with those of the water outlet holes 623.

[0075] The working principle of the present invention is:

[0076] The plastic tube is extruded through the extrusion die and moves toward the inside of the rotary control assembly 300, so that the outer wall of the plastic tube is fully exposed to the spraying area of ​​the spray assembly 600. The rotating body 700 is located inside the plastic tube. The motor 410 drives the rotating shaft 420 to rotate. The rotating shaft 420 drives the gear A430 to rotate. The gear A430 drives the auxiliary rotating sleeve 320 to rotate through the gear B440. The auxiliary rotating sleeve 320 drives the main rotating sleeve 310 to rotate. The main rotating sleeve 310 simultaneously drives the connecting plate 621 and the nozzle A610 to rotate. The connecting plate 621 drives the delivery pipe 622 to rotate. The delivery pipe 622 drives the connecting sleeve 624 and the nozzle B625 to rotate. The nozzles A610 and B625 can rotate to evenly and fully spray the cooling liquid in the water guide groove 360 ​​onto the outer wall of the plastic tube, thereby achieving rapid cooling and rapid cooling of the inner wall of the plastic tube, so that it can be quickly formed.

[0077] At the same time, the main rotating sleeve 310 can drive the magnetic part B540 in the fixed groove 370 to rotate, the magnetic part B540 drives the magnetic part A530 to rotate, the magnetic part A530 drives the annular sleeve 520 to rotate, the annular sleeve 520 drives the rotating body 700 to rotate in the plastic tube, the rotating body 700 drives the spiral guide groove 710 to rotate, the spiral guide groove 710 in the rotating state can drive the airflow to spiral and make it surge rapidly toward the direction close to the extrusion mold, and the extrusion mold blocks the spiral airflow and makes it surge close to the inner wall of the plastic tube. The blocked spiral airflow can surge along the inner wall of the plastic tube and surge out through the other end of the plastic tube. At the same time, due to the movement characteristics of the spiral flow, the airflow will generate a forward thrust along the axis of the pipe. This thrust will prompt the airflow to move rapidly toward one end of the pipe, which can accelerate the circulation rate of the air inside the pipe, thereby achieving rapid cooling and rapid cooling of the inner wall of the plastic tube.

[0078] Therefore, the outer wall of the plastic pipe is quickly cooled and cooled by circulating cooling liquid, and the inner wall of the plastic pipe is quickly cooled and cooled by gas flow. This combined cooling method can not only significantly shorten the entire cooling and cooling cycle, accelerate the molding rate and production rate of the plastic pipe, but also help reduce the deformation and stress concentration of the pipe caused by the large temperature difference between the inner and outer walls, and improve the stability of the molding size and mechanical properties of the plastic pipe. At the same time, compared with the use of only water cooling or air cooling, this combined cooling method can also more effectively save resources, achieve the function of cooling and increasing efficiency, and make the molded plastic pipe have a better visual effect.

[0079] The above is the working principle of the plastic pipe extrusion cooling device.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A plastic pipe extrusion cooling device, comprising a device box, wherein a plurality of cooling cylinders are distributed on the device box, wherein the plurality of cooling cylinders are composed of two semicircular cylinders, and a collection tank for collecting cooling liquid is opened on the inner wall of the semicircular cylinder at the bottom, and a drainage pipe extending to the outside of the cooling cylinder is fixed at the bottom of the collection tank, and the drainage pipe is connected to the circulating cooling system fixed in the device box through a connecting hose, and the cooling cylinder located at the starting end of the device box cooperates with the extrusion die on the extruder, and the cooling cylinder located at the end of the device box cooperates with the cutting device and the winding device of the plastic pipe, characterized in that Also includes: A rotary control assembly is provided at both ends of the cooling cylinder and is connected to the inner walls of the cooling cylinder through bearings. A water inlet pipe connected to the circulating cooling system is installed on the rotary control assembly. A spray assembly is provided between the two rotary control assemblies. The spray assembly is connected to the water inlet pipe thereon through the rotary control assembly. One end of the spray assembly is located inside the rotary control assembly and is fixedly connected to the inner wall thereof. The other end of the spray assembly is provided between the two rotary control assemblies. Fixed grooves are equidistantly distributed on the inner wall of the rotary control assembly. A rotating assembly is fixed on the device box, and the distribution number of the rotating assemblies is consistent with the distribution number of the cooling cylinder, and the output end of the rotating assembly is fixedly connected to the outer wall of one end of the rotary control assembly; A suspension assembly is symmetrically arranged inside the rotary control assembly, with magnetic components A and B respectively provided at both ends of the suspension assembly. The magnetic component A is circumferentially distributed on one end of the suspension assembly, and the magnetic component B is installed in a fixed groove. The magnetic components A and B repel each other due to their like polarity. A rotating body is installed between the two suspension assemblies in the same rotary control assembly, and a spiral guide groove is provided on the outer wall of the rotating body. The plastic tube is extruded through the extrusion die and moves toward the inside of the rotary control assembly. The plastic tube is fully exposed to the spray area of ​​the spray assembly. The rotating body is located inside the plastic tube. The rotating assembly drives the rotary control assembly to rotate, and the rotary control assembly drives the spray assembly to rotate. The spray assembly quickly cools the outer wall of the plastic tube by rotating. The rotary control component drives the magnetic component A to rotate through the magnetic component B. The magnetic component A drives the rotating body to rotate through the suspension component. The rotating body drives the spiral guide groove to rotate. The spiral guide groove in the rotating state drives the airflow to spiral and make it surge rapidly toward the direction close to the extrusion mold. The extrusion mold blocks the spiral airflow and makes it surge close to the inner wall of the plastic pipe. The blocked spiral airflow surges along the inner wall of the plastic pipe and achieves rapid cooling and rapid cooling of the inner wall of the plastic pipe.

2. The plastic pipe extrusion cooling device according to claim 1, characterized in that: The magnetic attraction parts A and B are preferably arc-shaped magnets with good magnetic properties, and the distribution quantity and distribution position of the two are consistent. The magnetic properties of the magnetic attraction parts A and B on the end surfaces close to each other are the same.

3. The plastic pipe extrusion cooling device according to claim 1, characterized in that: The rotary control assembly includes: One end of the main rotating sleeve extends into the cooling cylinder, the outer wall of one end of the main rotating sleeve is connected to the inner wall of the cooling cylinder through a bearing, and the inner wall of the main rotating sleeve is circumferentially distributed with fixed grooves; A secondary rotating sleeve is fixedly connected to the other end of the main rotating sleeve by bolts, the outer wall of the secondary rotating sleeve is connected to the rotating assembly, and the end surfaces of the main rotating sleeve and the secondary rotating sleeve close to each other are provided with a mounting groove and a water inlet groove, and the mounting groove is connected to the water inlet groove, the inner circumference of the main rotating sleeve is provided with a water guide groove connected to the water inlet groove, and one end of the main rotating sleeve is provided with a connecting groove that matches the water guide groove, the connecting groove is used for installing the spray assembly, and the water guide groove is connected to the spray assembly; and An arc-shaped partition is located between the main rotating sleeve and the auxiliary rotating sleeve. The arc-shaped partition is rotatably set in the installation groove. One end of the arc-shaped partition is slidably installed on the device box through a slider. A water inlet pipe connected to the water inlet trough is provided on the arc-shaped partition, and one end of the water inlet pipe is connected to the circulating cooling system.

4. The plastic pipe extrusion cooling device according to claim 3, characterized in that: The rotating assembly comprises: A motor fixed to the device box; Rotate a rotating shaft mounted on the device box, wherein the rotating shaft is fixedly connected to the output end of the motor; Installing gear A on the rotating shaft; and A gear B is provided on the outer wall of the auxiliary rotating sleeve and meshes with gear A.

5. The plastic pipe extrusion cooling device according to claim 1, characterized in that: The suspension assembly includes: a mounting shaft located inside the main rotating sleeve; and An annular sleeve is installed on the mounting shaft, and two annular sleeves are provided at both ends of the mounting shaft. A rotating body is installed between the two annular sleeves located at the same end. Grooves are distributed circumferentially on the annular sleeve, and the grooves are used for installing the magnetic component A.

6. The plastic pipe extrusion cooling device according to claim 3, characterized in that: The spray assembly comprises: Nozzles A are distributed on the inner wall of the main rotating sleeve, the nozzles A are located on both sides of the magnetic element B, and one end of the nozzles A is connected to the water guide groove in the main rotating sleeve; and The spray unit is located inside the cooling cylinder, and both ends of the spray unit are connected to the main rotating sleeves at both ends of the cooling cylinder and are connected to the water guide groove in the main rotating sleeve. The output ends of the spray unit and spray A are both facing the outer wall of the plastic pipe.

7. The plastic pipe extrusion cooling device according to claim 6, characterized in that: The spray unit comprises: A delivery pipe located inside the cooling cylinder, with water outlet holes evenly distributed on the delivery pipe; Connecting plates fixed on both ends of the delivery pipe, the connecting plates are locked in the connecting grooves by bolts, and the delivery pipe is connected to the guide grooves through the connecting plates; Connecting sleeves equidistantly distributed on the delivery pipe, the connecting sleeves matching the water outlet holes; and A spray head B is fixed on one side of the connecting sleeve and is in communication with the connecting sleeve, and faces the outer wall of the plastic pipe.

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