Plastic pipe extrusion cooling device

Abstract

The invention is suitable for the technical field of pipeline forming, and provides a plastic pipe extrusion cooling device which comprises a device box, a cooling cylinder, a collecting tank, a drainage pipe, a circulating cooling system, a rotary control assembly, a spraying assembly, a suspension assembly and a rotating body. A magnetic attraction piece A and a magnetic attraction piece B are arranged at the two ends of the suspension assembly correspondingly, and a spiral guide groove is formed in the outer wall of the rotating body. According to the plastic pipe extrusion cooling device, the rotary control assembly, the rotating assembly, the suspension assembly, the spraying assembly and the rotating body are matched with one another, the outer wall of a plastic pipe can be subjected to water cooling, meanwhile, the inner wall of the plastic pipe can be subjected to air cooling, through the combined cooling method, the whole cooling and cooling period can be remarkably shortened, and the cooling efficiency is improved. And the problems of pipeline deformation and stress concentration caused by overlarge temperature difference between the inner wall and the outer wall can be reduced, and the stability and the mechanical performance of the forming size of the plastic pipe are improved.

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 pipe is a material widely used in industry, construction and daily life. It is favored for its advantages such as lightness, corrosion resistance and low cost. In the production process of plastic pipe, extrusion molding is one of the key steps, and proper cooling of the pipe is crucial in this process. Effective cooling measures can significantly improve the quality and performance of the final product.

[0003] The existing plastic pipe extrusion cooling device can freely switch between rapid cooling or gradual cooling, and has good versatility. When the telescopic rod is in an 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 a contracted 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 situation, it is urgent 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 comprises a device box, on which a plurality of cooling cylinders are distributed, each of which is composed of two semicircular cylinders, and a collecting groove for collecting cooling liquid is provided on the inner wall of the semicircular cylinder at the bottom, a drain pipe extending to the outside of the cooling cylinder is fixed at the bottom of the collecting groove, and the drain pipe is connected to a circulating cooling system fixed in the device box through a connecting hose, and the cooling cylinder at the beginning of the device box cooperates with an extrusion die on an extruder, and the cooling cylinder at the end of the device box cooperates with a cutting device and a winding device for the plastic pipe, and further comprises:

[0009] A rotary control assembly, the rotary control assembly is distributed at both ends of the cooling cylinder and is connected to the inner walls of the two ends 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 arranged 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 in the rotary control assembly and is fixedly connected to the inner wall thereof, the other end of the spray assembly is distributed between the two rotary control assemblies, and fixed grooves are equidistantly distributed on the inner wall of the rotary control assembly;

[0010] A rotating assembly, wherein the rotating assembly is fixed on the device box, and the distribution number of the rotating assembly 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 component, wherein the suspension component is symmetrically arranged inside the rotation control component, and a magnetic component A and a magnetic component B are respectively arranged at both ends of the suspension component, wherein the magnetic component A is circumferentially distributed on one end of the suspension component, and the magnetic component B is installed in a fixed groove, and the magnetic component A and the magnetic component B repel each other with the same polarity, and a rotating body is installed between the two suspension components in the same rotation control component, and a spiral guide groove is opened 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 component. The plastic tube is fully exposed in the spraying area of ​​the spray component. The rotating body is located inside the plastic tube. The rotating component drives the rotary control component to rotate. The rotary control component drives the spray component to rotate. The spray component 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, and 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 makes it surge rapidly toward the direction close to the extrusion die. The extrusion die 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 realizes 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 attraction component A and the magnetic attraction component B preferably adopt an arc-shaped magnet with good magnetic properties, and the distribution quantity and distribution position of the two are consistent, and the magnetic attraction component A and the magnetic attraction component B have the same magnetic properties on the end surfaces close to each other.

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

[0016] One end of the main rotating sleeve extends to 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 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, the main rotating sleeve and the secondary rotating sleeve are provided with mounting grooves and water inlet grooves on their mutually adjacent end surfaces, and the mounting grooves are communicated with the water inlet grooves, the main rotating sleeve is provided with water guide grooves communicated with the water inlet grooves distributed circumferentially inside, and one end of the main rotating sleeve is provided with a connecting groove matched with the water guide groove, the connecting groove is used for installation of the spray assembly, and the water guide groove is communicated with the spray assembly; and

[0018] An arc-shaped partition is located between the main rotating sleeve and the auxiliary rotating sleeve, and 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 groove is arranged 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 an 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 the gear A.

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

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

[0026] An annular sleeve seat is installed on the installation shaft, and two annular sleeve seats are arranged at both ends of the installation shaft. A rotating body is installed between the two annular sleeve seats at the same end. Grooves are distributed circumferentially on the annular sleeve seat, and the grooves are used for installing the magnetic suction component A.

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

[0028] The nozzles A are distributed on the inner wall of the main rotating sleeve, the nozzles A are located on both sides of the magnetic attraction member 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 comprises:

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

[0032] A connecting plate fixed on both ends of the conveying pipe, the connecting plate is locked in the connecting groove by bolts, and the conveying pipe is connected with the guide groove through the connecting plate;

[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 communicated with the connecting sleeve, and the spray head B 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 quickly 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 make it surge quickly toward the direction close to the extrusion mold by driving the spiral guide groove to rotate, 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 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 plastic pipes, 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 single use of water cooling or air cooling, this combined cooling method can also save resources more effectively, realize 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 in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[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 Structural explosion diagram 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 An enlarged view of the structure of the mid-suspended assembly and the rotating body.

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

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

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

[0048] Fig.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 - installation 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 solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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 in conjunction with 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, each of which is composed of two semicircular cylinders, and a collecting tank 210 for collecting cooling liquid is provided on the inner wall of the semicircular cylinder at the bottom, a drain pipe 220 extending to the outside of the cooling cylinder 200 is fixed at the bottom of the collecting tank 210, and the drain 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 beginning 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 the cutting device or winding device of the plastic pipe, and also includes:

[0053] A rotary control assembly 300, wherein the rotary control assembly 300 is distributed at both ends of the cooling cylinder 200 and is respectively connected to the inner walls of the two ends of the cooling cylinder 200 through bearings 800, and a water inlet pipe 380 connected to a circulating cooling system is installed on the rotary control assembly 300, and a spray assembly 600 is arranged between the two rotary control assemblies 300, and the spray assembly 600 is connected to the water inlet pipe 380 on the rotary control assembly 300, and one end of the spray assembly 600 is located in the rotary control assembly 300 and is fixedly connected to the inner wall thereof, and the other end of the spray assembly 600 is distributed between the two rotary control assemblies 300, and fixing grooves 370 are evenly distributed on the inner wall of the rotary control assembly 300;

[0054] The rotating assembly 400 is fixed on the device box 100, and the distribution number of the rotating assembly 400 is consistent with the distribution number of the cooling cylinder 200, and 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] A suspension component 500, wherein the suspension component 500 is symmetrically arranged inside the rotation control component 300, and a magnetic component A530 and a magnetic component B540 are respectively arranged at two ends of the suspension component 500, wherein the magnetic component A530 is circumferentially distributed on one end of the suspension component 500, and the magnetic component B540 is installed in a fixing groove 370, and the magnetic component A530 and the magnetic component B540 repel each other with the same polarity, and a rotating body 700 is installed between two suspension components 500 in the same rotation control component 300, and a spiral guide groove 710 is opened on the outer wall of the rotating body 700;

[0056] 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 in the spraying area of ​​the spray assembly 600, and 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 down and quickly cool the outer wall of the plastic tube by rotating, so that it can be 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 direction 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 plastic pipes, 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 single use of water cooling or air cooling, this combined cooling method can also save resources more effectively, realize 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 suction component A530 and the magnetic suction component B540 both preferably adopt an arc 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, so that the plastic tube can effectively and quickly enter the space between the suspension component 500 and the rotation control component 300. At the same time, the magnetic suction component A530 and the magnetic suction 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 plate 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 a 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 their end surfaces close to each other, and the mounting grooves 340 are connected to the water inlet grooves 350, the arc-shaped partition plate 330, and the mounting grooves 340 are connected to the water inlet grooves 350, the arc-shaped partition plate 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. A water inlet pipe 380 connected to the water inlet groove 350 is arranged on the arc-shaped partition 330. One end of the water inlet pipe 380 is connected to the circulating cooling system. The main rotating sleeve 310 has a water guide groove 360 ​​connected to the water inlet groove 350 distributed circumferentially inside, and a connecting groove 390 matching the water guide groove 360 ​​is opened at one end of the main rotating sleeve 310. 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 has a fixing groove 370 distributed circumferentially.

[0061] In this embodiment, when the main rotating sleeve 310 and the auxiliary rotating sleeve 320 are locked as a whole by bolts, the mounting grooves 340 on the two can clamp the arc partition 330 so that it is stably placed in the mounting grooves 340, and the main rotating sleeve 310, the auxiliary rotating sleeve 320 and the arc partition 330 can seal the water inlet groove 350, and the circulating cooling system guides the cooling liquid into the water inlet groove 350 through the water inlet pipe 380, and then guides it into the water guide groove 360 ​​from the water inlet groove 350, and finally transports it to the spray assembly 600 through the water guide groove 360, and is 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, so that it can be quickly shaped;

[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 grooves 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 plate 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 on the output end of the motor 410. The rotating shaft 420 is rotatably mounted on the device box 100. The rotating shaft 420 is mounted with a gear A430, and the gear A430 is meshed 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 plate 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 down and quickly cool the outer wall of the plastic pipe by rotating, so that it can be 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, the rotating body 700 drives the spiral guide groove 710 to rotate, and the spiral guide groove 710 in the rotating state can drive the airflow to spiral and make it surge quickly in 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 seat 520, the mounting shaft 510 is located inside the main rotating sleeve 310, two annular sleeve seats 520 are installed at both ends of the mounting shaft 510, a rotating body 700 is installed between the two annular sleeve seats 520 located at the same end, and grooves are distributed circumferentially on the annular sleeve seat 520, and the grooves are used for the installation of 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 suction component B540 and the magnetic suction 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, both 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 drives the nozzle A610 and the spray unit 620 to rotate synchronously. The nozzle A610 can cooperate with the spray unit 620 to evenly and fully spray the cooling liquid in the water guide groove 360 ​​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, thereby 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 bolted in the connecting groove 390. The delivery pipe 622 is connected to the guide groove. The delivery pipe 622 is provided with water outlet holes 623 and connecting sleeves 624 at equal intervals. The connecting sleeve 624 cooperates with the water outlet hole 623, and a nozzle B625 is fixedly connected to one side of the connecting sleeve 624, and 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 evenly and fully spray the cooling liquid in the delivery pipe 622 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, allowing it to be quickly molded, thereby 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 means of a top screw, and the connecting sleeve 624 is consistent in number and position with 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 component 300, so that the outer wall of the plastic tube is fully exposed in the spraying area of ​​the spraying component 600, and 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 drives the connecting plate 621 and the nozzle A610 to rotate at the same time, the connecting plate 621 drives the conveying pipe 622 to rotate, the conveying pipe 622 drives the connecting sleeve 624 and the nozzle B625 to rotate, the nozzle A610 and the nozzle B625 can evenly and fully spray the cooling liquid in the water guide groove 360 ​​onto the outer wall of the plastic tube by rotating, thereby realizing 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 element B540 in the fixed groove 370 to rotate, the magnetic element B540 drives the magnetic element A530 to rotate, the magnetic element A530 drives the annular sleeve seat 520 to rotate, the annular sleeve seat 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 direction of the pipe, and 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 single use of water cooling or air cooling, this combined cooling method can also save resources more effectively, realize the function of cooling and increasing efficiency, and make the formed 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 protection scope of the present invention.

Claims

1. A plastic pipe extrusion cooling device, comprising a device box, on which a plurality of cooling cylinders are distributed, each of which is composed of two semicircular cylinders, and a collecting groove for collecting cooling liquid is provided on the inner wall of the semicircular cylinder at the bottom, a drain pipe extending to the outside of the cooling cylinder is fixed at the bottom of the collecting groove, and the drain pipe is connected to a circulating cooling system fixed in the device box through a connecting hose, and the cooling cylinder at the beginning of the device box cooperates with the extrusion die on the extruder, and the cooling cylinder 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, the rotary control assembly is distributed at both ends of the cooling cylinder and is connected to the inner walls of the two ends 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 arranged 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 in the rotary control assembly and is fixedly connected to the inner wall thereof, the other end of the spray assembly is distributed between the two rotary control assemblies, and fixed grooves are equidistantly distributed on the inner wall of the rotary control assembly; A rotating assembly, wherein the rotating assembly is fixed on the device box, and the distribution number of the rotating assembly 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 component, wherein the suspension component is symmetrically arranged inside the rotation control component, and a magnetic component A and a magnetic component B are respectively arranged at both ends of the suspension component, wherein the magnetic component A is circumferentially distributed on one end of the suspension component, and the magnetic component B is installed in a fixed groove, and the magnetic component A and the magnetic component B repel each other with the same polarity, and a rotating body is installed between the two suspension components in the same rotation control component, and a spiral guide groove is opened 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 component. The plastic tube is fully exposed in the spraying area of ​​the spray component. The rotating body is located inside the plastic tube. The rotating component drives the rotary control component to rotate. The rotary control component drives the spray component to rotate. The spray component 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, and 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 makes it surge rapidly toward the direction close to the extrusion die. The extrusion die 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 realizes 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 member A and the magnetic attraction member B preferably adopt an arc-shaped magnet with good magnetic properties, and the distribution quantity and distribution position of the two are consistent. The magnetic properties of the magnetic attraction member A and the magnetic attraction member 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 comprises: One end of the main rotating sleeve extends to 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 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, the main rotating sleeve and the secondary rotating sleeve are provided with mounting grooves and water inlet grooves on their mutually adjacent end surfaces, and the mounting grooves are communicated with the water inlet grooves, the main rotating sleeve is provided with water guide grooves communicated with the water inlet grooves distributed circumferentially inside, and one end of the main rotating sleeve is provided with a connecting groove matched with the water guide groove, the connecting groove is used for installation of the spray assembly, and the water guide groove is communicated with the spray assembly; and An arc-shaped partition is located between the main rotating sleeve and the auxiliary rotating sleeve, and 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 groove is arranged 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 an 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 the gear A.

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

6. The plastic pipe extrusion cooling device according to claim 3, characterized in that: The spray assembly comprises: The nozzles A are distributed on the inner wall of the main rotating sleeve, the nozzles A are located on both sides of the magnetic attraction member 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; A connecting plate fixed on both ends of the conveying pipe, the connecting plate is locked in the connecting groove by bolts, and the conveying pipe is connected with the guide groove through the connecting plate; 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 communicated with the connecting sleeve, and the spray head B faces the outer wall of the plastic pipe.

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