Production process and production equipment of nylon tube

Abstract

The invention belongs to the technical field of nylon tube production, and particularly relates to a production process and production equipment of a nylon tube. The production process comprises the following steps: step 1, putting the raw materials including the nylon resin, the aminated carbon nanotubes, the antioxidant and the like into a mixer according to a ratio, and mixing to obtain a mixed material; step 2, putting the mixed material obtained in the step 1 into a screw extruder, carrying out melt blending extrusion, and manufacturing through a granulator to obtain pipe-making particles; 3, the pipe making particles obtained in the step 2 serve as raw materials and are put into a screw extruder to be extruded and formed; 4, after the extruded pipe blank is shaped through a sizing sleeve, the pipe blank is gradually cooled in a stepped surrounding cooling mode, and the nylon pipe is obtained. And fifthly, the nylon pipe is cut according to the specification and size.

Description

Technical Field

[0001] The invention belongs to the technical field of nylon tube production, and in particular relates to a production process and production equipment for nylon tubes. Background Art

[0002] A general term for polyurethane resins, including aliphatic PA, aliphatic-aromatic PA, and aromatic PA. Plastic pipes made from nylon have excellent wear resistance, heat resistance, mechanical strength, elasticity, toughness, and bending fatigue resistance.

[0003] Traditional nylon tubes use water cooling or compressed air for heat dissipation after production. The gas or cooling water is unevenly distributed on the surface of the nylon tube, resulting in uneven heat dissipation on the surface of the nylon tube, which in turn leads to uneven stress distribution inside the nylon tube, affecting the mechanical properties and service life of the nylon tube. Summary of the Invention

[0004] The purpose of the present invention is to provide a production process and production equipment that can ensure ideal cooling of nylon tubes in response to the above-mentioned technical problems.

[0005] In view of this, the present invention provides a production process for a nylon tube, comprising: Step 1: adding raw materials including nylon resin, amino-modified carbon nanotubes and antioxidant into a mixer in proportion and mixing to obtain a mixed material; Step 2: feeding the mixture obtained in step 1 into a screw extruder, performing melt blending and extrusion, and then passing through a granulator to obtain tube-making particles; Step 3: Using the tube-making particles obtained in step 2 as raw materials, feeding them into a screw extruder for extrusion molding; Step 4: After the extruded tube is shaped by a sizing sleeve, it is gradually cooled by a step-by-step cooling method to obtain a nylon tube; Step 5: Cut the nylon tube according to the specifications.

[0006] A production equipment for a nylon tube production process, wherein the tube blank after shaping in step 4 is cooled by a multi-stage cooling device, the equipment comprising: Several water cooling modules are arranged in sequence, and the temperature of the cooling water in the water cooling module is lower as it is further away from the screw extruder. Each water cooling module includes: The cooling collection box is used to collect cooling water, and its lower part is provided with a supporting frame; The receiving water tank is fixed on the support frame and is used to receive the cooling water collected from the cooling collection tank in the adjacent water-cooling module; Water cooler, mounted on the cooling water tank; The cooling delivery pump is installed on the support frame and delivers the cooling water in the receiving water tank to the water cooler; The water-cooling module also includes a cooling drive motor, which can be mounted on one side of the support frame to drive the cooler to operate.

[0007] In the above technical solution, further, the water cooler includes: A rotating water ring is formed with a channel for the nylon tube to pass through; Two supporting water rings are respectively arranged at both ends of the rotating water ring and support the rotating water ring; The rotating water ring includes: Two cooling water rings are symmetrically arranged and offset each other, and a cooling channel is formed therein for cooling water to pass through and be discharged; The outer transmission ring is sleeved on the connection of the two cooling water rings and is radially limited thereto; Two outer compression rings are arranged at the connection of the two outer transmission rings and axially fix the outer transmission rings at the connection of the two cooling water rings; The outer transmission ring can be a pulley or a sprocket, and a plurality of evenly distributed positioning grooves are formed on the inner wall of the outer transmission ring. Positioning blocks that cooperate with the positioning grooves are respectively formed on the outer walls of the two cooling water rings. The overlapping thickness of the two positioning blocks is greater than the depth of the positioning grooves. A hidden groove for the positioning blocks to be placed is formed on the end face of the outer clamping ring near the connection of the two cooling water rings; the two outer clamping rings limit the outer transmission ring on the connection of the two cooling water rings and fix it with bolts and nuts, and the holes for the bolts to pass through pass through the positioning blocks and the hidden grooves; the outer transmission ring is driven to rotate by the cooling drive motor and the transmission belt or chain.

[0008] In the above technical solution, further, the cooling water ring includes: The supporting ring body is used to connect with the outer transmission ring, and the supporting ring body has a connecting through hole and a receiving hole formed therein from one end close to the outer transmission ring to the other end; An outer cooling ring is disposed in the receiving hole of the support ring body and extends out of the receiving hole; A water ring seal is provided at the connection between the outer support ring body and the outer cooling ring; The outer cooling ring includes: The cooling ring body is a conical shell structure, is arranged in the receiving hole and forms a receiving water chamber between the receiving hole; Several cooling water outlet holes are evenly distributed on the cooling ring body and connected to the receiving water chamber; A limiting plate is integrally formed on one end of the cooling ring body away from the supporting ring body and abuts against the end surface of the supporting ring body; The receiving ring is integrally formed at one end of the limiting plate away from the cooling ring body, and has an outer row of holes in communication with the interior of the cooling ring body; The positioning block is integrally formed on the outer wall of the supporting ring body, and a nozzle can be provided on each cooling water outlet hole, and the water ring seal is provided at the connection between the limiting plate and the supporting ring body, and the outer row hole is a cone.

[0009] In the above technical solution, further, the outer cooling ring further includes: A plurality of guide ribs are evenly distributed on the outer wall of the cooling ring body according to the circumference, and divide the receiving water chamber into a plurality of evenly distributed receiving cavities; A receiving groove is provided on the end surface of the limiting plate away from the supporting ring body; A plurality of water injection holes are evenly distributed along the circumference and connect the receiving groove and the receiving water chamber, and the number of the water injection holes is equal to the number of the receiving chambers; The limit plate and the support ring body are detachably connected, the guide ribs can be in the shape of a vortex line, and the same receiving cavity connects the same upwardly inclined cooling water outlet hole; the cooling channel of the cooling water ring is formed by connecting the receiving groove, the water injection hole, the receiving cavity and the cooling water outlet hole.

[0010] In the above technical solution, further, the supporting water ring includes: An outer fixing ring is sleeved on one end of the cooling water ring; The limiting pressure ring is arranged at one end of the outer fixed ring close to the cooling water ring, and limits the middle part of the cooling water ring on the outer fixed ring; An outer positioning ring is provided at one end of the outer fixing ring away from the cooling water ring and limits the end of the cooling water ring; Several cooling water inlet holes are evenly distributed on the outer positioning ring along the circumference; Several dispersed holes are evenly distributed in the outer fixed ring according to the circumference, and one end of each hole is connected to the cooling water inlet hole and the other end is connected to the cooling channel. The outer retaining frame is fixedly connected to the lower part of the outer fixing ring and is used to support and fix the water ring.

[0011] In the above technical solution, further, the supporting water ring also includes: The outer socket is fixedly arranged outside the outer fixing ring, and a water inlet is formed at the lower end thereof and is connected to the cooling delivery pump through a pipeline; Several water distribution pipes are evenly distributed on the outer edge of the outer fixed ring along the circumference, and one end is connected to the outer socket and the other end is connected to the cooling water inlet hole; A first supporting assembly is provided between the limiting pressure ring and the cooling water ring; A second support assembly is formed with a support groove in the outer fixed ring, and the second support assembly is arranged on the support groove and is located between the outer fixed ring and the cooling water ring; End seals, arranged at the inner wall of the limiting pressure ring and the end of the cooling water ring; A plurality of rotating seals are respectively arranged on the inner wall and the end surface where the outer fixed ring contacts the cooling water ring.

[0012] In this technical solution, the external receiving pipe is used to receive the cooling water pumped by the cooling delivery pump, and evenly distribute the cooling water to each water distribution pipe, and then enter the cooling water inlet hole.

[0013] The first support assembly includes a support bearing, which is arranged between the limit pressure ring and the limit plate, so as to ensure that the outer cooling ring can rotate smoothly relative to the support water ring, and the second support assembly includes multiple support bearings, which can better support the receiving ring of the outer cooling ring and further ensure the stable and smooth rotation of the outer cooling ring.

[0014] The setting of the end seal can improve the sealing effect of the contact between the outer fixed ring and the receiving ring; the setting of the rotary seal can improve the sealing of the connection between the outer fixed ring and the limit plate and receiving ring in the cooling water ring; thereby ensuring that the coolant will not overflow, thereby affecting the cooling effect.

[0015] The beneficial effects of the present invention are: 1. During the production process, the extruded tube is gradually cooled by a step-by-step cooling method, ensuring uniform heat dissipation in the pipe and the cooling effect; 2. The nylon tube is cooled by multiple water-cooling modules to ensure the cooling effect. The further away from the screw extruder, the lower the temperature of the cooling water in the water-cooling module. Therefore, during the extrusion of the tube billet, the higher temperature cooling water is used to cool it, and then the temperature of the cooling water is gradually reduced to achieve a step-by-step cooling method for cooling the nylon tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the production equipment in the present invention; Figure 2 It is a structural schematic diagram of the water cooler in the present invention; Figure 3 It is a partial structural diagram of the water cooler in the present invention; Figure 4 is a schematic cross-sectional view of a water cooler in the present invention; Figure 5 It is a partial cross-sectional schematic diagram of the water cooler of the present invention; Figure 6 It is a schematic structural diagram of the outer cooling ring in the present invention; Figure 7 yes Figure 5 A partial enlarged view of point Ⅰ in the middle; Figure 8 yes Figure 5 A partial enlarged view of the middle II; Figure 9 yes Figure 5 A partial enlarged view of point III in the middle; The markings in the figure are as follows: 1-cooling collection box, 2-support frame, 3-receiving water tank, 4-cooling water ring, 4a-support ring body, 4b-through hole, 4c-cooling ring body, 4d-receiving water chamber, 4e-cooling water outlet hole, 4f-limiting plate, 4g-receiving ring, 4h-external discharge hole, 4i-guide rib, 4j-receiving groove, 4k-water injection hole, 4l-receiving cavity, 5-external transmission ring, 6-external clamping ring, 7-support water ring, 7a-external fixing ring, 7b-limiting pressure ring, 7c-external positioning ring, 7d-cooling water inlet hole, 7e-dispersion hole, 7f-external retaining frame, 7g-external receiving Pipe, 7h-water distribution pipe, 7i-first support assembly, 7j-second support assembly, 8-end seal, 8a-end seal body, 8b-limiting groove, 8c-middle guide section, 8d-outer guide section, 9-rotating seal, 9a-rotating seal body, 9b-sealing edge, 9c-seal placement groove, 9d-reinforced seal body, 10-water ring seal, 10a-outer seal body, 10b-lower sealing part, 10c-arc-shaped part, 10d-annular part, 10e-upper sealing part, 10f-upper sealing rib, 10g-side sealing rib, 11-water ring sealing groove, 100-water cooling module. DETAILED DESCRIPTION

[0017] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0018] Example 1: This embodiment provides a production process for a nylon tube, comprising: Step 1: adding raw materials including nylon resin, amino-modified carbon nanotubes and antioxidant into a mixer in proportion and mixing to obtain a mixed material; Step 2: feeding the mixture obtained in step 1 into a screw extruder, performing melt blending and extrusion, and then passing through a granulator to obtain tube-making particles; Step 3: Using the tube-making particles obtained in step 2 as raw materials, feeding them into a screw extruder for extrusion molding; Step 4: After the extruded tube is shaped by a sizing sleeve, it is gradually cooled by a step-by-step cooling method to obtain a nylon tube; Step 5: Cut the nylon tube according to the specifications.

[0019] In this technical solution, by adding raw materials such as amino-treated carbon nanotubes and antioxidants to nylon resin, the mechanical properties of the produced nylon tubes can be enhanced, the thermal stability can be improved, and the flame retardancy and oxidation resistance can be improved, thereby ensuring the overall service life of the nylon tubes. The raw materials such as nylon resin, amino-treated carbon nanotubes, and antioxidants are first mixed to form tube-making particles, which ensures that the materials are evenly mixed. At the same time, the produced tube-making particles can be stored for future use, so that steps one and two, and steps three to five, do not need to be operated continuously and can be performed separately, thereby improving the production efficiency of nylon tubes. The extruded tube blanks are gradually cooled by a stepped surrounding cooling method, ensuring uniform heat dissipation in the pipe and the cooling effect, preventing the formed tube blanks from cooling instantly and affecting the performance of the nylon tube.

[0020] Example 2: This embodiment provides a nylon tube production device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0021] The tube blank after shaping in step 4 is cooled by a multi-stage cooling device, which includes: Several water cooling modules 100 are arranged in sequence, and the temperature of the cooling water in the water cooling module 100 is lower as it moves away from the screw extruder. Each water cooling module 100 includes: The cooling collection box 1 is used to collect cooling water, and its lower part is provided with a support frame 2 for supporting function; The receiving water tank 3 is fixed on the support frame 2 and is used to receive the cooling water collected from the cooling collection tank 1 in the water cooling module 100 adjacent to it and away from the side of the screw extruder; Water cooler, mounted on the cooling water tank; The cooling delivery pump is installed on the support frame 2 and delivers the cooling water in the receiving water tank 3 to the water cooler; The water cooling module 100 further includes a cooling drive motor, which can be mounted on one side of the support frame 2 and drives the cooler to operate through the cooling drive motor.

[0022] In this technical solution, the nylon tube is cooled by multiple water-cooling modules 100, thereby ensuring the cooling effect. The further away from the screw extruder, the lower the temperature of the cooling water in the water-cooling module 100. Therefore, during the extrusion of the tube billet, the higher the temperature of the cooling water is, the cooling is performed. Then, the temperature of the cooling water is gradually reduced, achieving a step-by-step cooling method for cooling the nylon tube. At the same time, the equipment also includes a return water tank, which receives the cooling water discharged from the water-cooling module 100 on the side of the screw extruder, and a cooler is set in the return water tank. The water inside the return water tank is cooled by the cooler and then pumped to the water-cooling module 100 on the outermost side away from the screw extruder by a delivery pump.

[0023] The water cooler in the water-cooling module 100 is used to provide circumferential cooling of the pipes. The water cooler is mounted on the cooling collection tank 1. Coolant discharged from the water cooler is collected by the cooling water tank and then piped to the adjacent receiving water tank 3 in the water-cooling module 100. The provision of a cooling delivery pump ensures sufficient cooling water pressure, thereby ensuring good cooling performance. A cooling drive motor is installed on one side of the support frame 2 to rotate the water cooler. The formed tube billet passes through the center of the water cooler and is then cooled by the circumferential water flow, ensuring uniform heat dissipation and effective cooling on the tube billet surface.

[0024] Example 3: This embodiment provides a nylon tube production device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0025] Water cooler includes: A rotating water ring is formed with a channel for the nylon tube to pass through; Two supporting water rings 7 are respectively arranged at both ends of the rotating water ring and support the rotating water ring; The rotating water ring includes: Two cooling water rings 4 are symmetrically arranged and offset each other, and cooling channels are formed therein for cooling water to pass through and be discharged; The outer transmission ring 5 is sleeved on the connection between the two cooling water rings 4 and is radially limited thereto; Two outer compression rings 6 are provided at the connection of the two outer transmission rings 5 and axially fix the outer transmission ring 5 at the connection of the two cooling water rings 4; The outer transmission ring 5 can be a pulley or a sprocket, and a number of evenly distributed positioning grooves are formed on the inner wall of the outer transmission ring 5. Positioning blocks that cooperate with the positioning grooves are respectively formed on the outer walls of the two cooling water rings 4. The overlapping thickness of the two positioning blocks is greater than the depth of the positioning grooves. A hidden groove for the positioning blocks to be placed is formed on the end face of the outer clamping ring near the connection between the two cooling water rings 4; the two outer clamping rings 6 limit the outer transmission ring 5 on the connection between the two cooling water rings 4 and fix it with bolts and nuts, and the holes for the bolts to pass through pass through the positioning blocks and the hidden grooves; the outer transmission ring 5 is driven to rotate by the cooling drive motor and the transmission belt or chain, and then the outer transmission ring 5 drives the two cooling water rings 4 to rotate.

[0026] In this technical solution, the rotating water ring is used to receive cooling water and spray the cooling water out from the channel in the middle thereof. When the nylon tube passes through the channel in the middle thereof, the rotating water ring rotates on itself, so that the cooling water is sprayed in a circular manner on the outer wall of the nylon tube; and the supporting water ring 7 is provided to support the rotating water ring, thereby preventing the rotating water ring from shaking, thereby ensuring the cooling effect of the rotating water ring and the stability of its operation.

[0027] The rotating water ring is formed by connecting two cooling water rings 4, which facilitates the production and assembly of the rotating water ring. A cooling channel is formed in each cooling water ring 4, so that the pipeline can be cooled twice when passing through a water cooler, thereby ensuring the cooling effect.

[0028] The setting of the outer transmission ring 5 can better transmit the cooling drive motor torque to the rotating water ring, thereby ensuring that the rotating water ring can rotate stably; the setting of the outer clamping ring 6 can ensure the stability of the connection between the outer transmission ring 5 and the cooling water ring 4.

[0029] The cooperation between the positioning groove formed on the inner wall of the outer transmission ring 5 and the positioning block on the outer wall of the cooling water ring 4 can achieve good torque transmission, and multiple positioning grooves are provided to ensure stable transmission; at the same time, the hidden groove of the outer clamping ring covers the positioning groove and the positioning block, and the outer clamping ring 6 is connected by bolts and nuts, which can facilitate the assembly and subsequent maintenance of the rotating water ring. At the same time, the holes for the bolts to pass through the positioning block and the hidden groove to improve the stability of the connection between the outer clamping ring 6 and the cooling water ring 4.

[0030] In order to ensure the strength of the overall structure of the water cooler, the main structural material of the rotating water ring and the supporting water ring 7 is metal, such as stainless steel, aluminum alloy and copper alloy.

[0031] Example 4: This embodiment provides a nylon tube production device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0032] The cooling water ring 4 includes: The supporting ring body 4a is used to connect with the outer transmission ring 5, and has a connecting through hole 4b and a receiving hole formed inside the supporting ring body from one end of the outer transmission ring 5 to the other end; an outer cooling ring, disposed in the receiving hole of the support ring body 4a and extending out of the receiving hole; The water ring seal 10 is provided at the connection between the outer support ring 4a and the outer cooling ring; The outer cooling ring includes: The cooling ring body 4c is a conical shell structure, disposed in the receiving hole and forming a receiving water chamber 4d between the receiving hole; Several cooling water outlet holes 4e are evenly distributed on the cooling ring 4c and communicate with the receiving water chamber 4d; The limiting plate 4f is integrally formed on the end of the cooling ring body 4c away from the supporting ring body 4a and abuts against the end surface of the supporting ring body 4a; The receiving ring 4g is integrally formed at the end of the limiting plate 4f away from the cooling ring body 4c, and has an outer row of holes 4h formed therein that communicate with the interior of the cooling ring body 4c; The positioning block is integrally formed on the outer wall of the support ring body 4a, and a nozzle can be set on each cooling water outlet hole 4e, and the water ring seal 10 is set at the connection between the limit plate 4f and the support ring body 4a, and the outer discharge hole 4h is a cone.

[0033] In this technical solution, the support ring body 4a plays a supporting role in the cooling water ring 4. The two connected cooling water rings 4 are fixed by the outer clamping ring 6 after being offset by the support ring body 4a; the through hole 4b in the support ring body 4a is used for the passage of the pipeline, and the receiving hole is used for the placement of the outer cooling ring; and the outer cooling ring is used for the passage of cooling water and spraying it out from its inner wall, thereby cooling the nylon tube.

[0034] The provision of the water ring seal 10 can improve the sealing effect of the connection between the support ring body 4a and the limiting plate 4f of the outer cooling ring.

[0035] The cooling ring body 4c in the outer cooling ring is in the shape of a cone shell, and the pipeline passes through the middle of the cooling ring body 4c, and a receiving water chamber 4d is formed between the cooling ring body 4c and the receiving hole. The receiving water chamber 4d is conical as a whole, which can ensure that the cooling water can be better distributed outside the cooling ring body 4c. The cooling water entering the receiving water chamber 4d then enters the cooling ring body 4c through the cooling water outlet 4e, so that the cooling water can be sprayed out in a manner surrounding the nylon tube, ensuring uniform heat dissipation on the outer wall of the tube.

[0036] In order to ensure the stability of the installation of the outer cooling ring, a positioning groove is formed on the end face of the receiving hole of the support ring body 4a. The end of the cooling ring body 4c is stuck in the positioning groove, and then the outer cooling ring is fixed to the support ring body 4a through the limiting plate 4f.

[0037] The provision of the receiving ring 4g can facilitate the connection and fixation with the supporting water ring 7, thereby ensuring the stability of the structure after the outer cooling ring is installed.

[0038] The arrangement of the nozzle can ensure that the cooling water can be sprayed more concentratedly toward the middle of the cooling ring 4c, and then evenly sprayed onto the outer wall of the tube, thereby achieving a good cooling effect. The nozzle can be a boost nozzle.

[0039] At the same time, since the inner wall of the cooling ring body 4c and the outer discharge hole 4h are both conical surfaces with increasing diameters away from the connection between the two outer cooling rings, the cooling water sprayed in the cooling ring body 4c can be discharged better.

[0040] Example 5: This embodiment provides a nylon tube production device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0041] The outer cooling ring also includes: A plurality of guide ribs 4i are evenly distributed on the outer wall of the cooling ring 4c along a circumference, and divide the receiving water chamber 4d into a plurality of evenly distributed receiving cavities 41; The receiving groove 4j is provided on the end surface of the limiting plate 4f away from the supporting ring body 4a; A plurality of water injection holes 4k are evenly distributed along the circumference and connect the receiving groove 4j and the receiving water chamber 4d, and the number of the water injection holes 4k is equal to the number of the receiving chamber 4l; The limit plate 4f is detachably connected to the support ring body 4a, the guide rib 4i can be in the shape of a vortex line, and the same receiving cavity 4l connects the cooling water outlet holes 4e in the same oblique direction; the cooling channel of the cooling water ring 4 is formed by connecting the receiving groove 4j, the water injection hole 4k, the receiving cavity 4l and the cooling water outlet hole 4e.

[0042] In this technical solution, the setting of the guide ribs 4i divides the receiving water chamber 4d into several evenly distributed receiving cavities 4l, so that the water can be more evenly distributed in each receiving cavity 4l, ensuring the uniformity and pressure of the sprayed cooling water.

[0043] The water injection hole 4k is used to ensure that the cooling water can smoothly enter the receiving chamber. At the same time, the number of water injection holes 4k is equal to the number of receiving chambers 4l, and one water injection hole 4k is connected to one receiving chamber 4l, thereby ensuring that each receiving chamber 4l can be evenly filled with water during the rotation of the rotating water ring, preventing uneven distribution of cooling water, and thus ensuring the cooling effect of cooling water spraying.

[0044] The receiving groove 4j is provided to connect with the water inlet channel on the supporting water ring 7 to ensure that the cooling water can smoothly enter the water injection hole 4k.

[0045] The guide ribs 4i can be vortex-shaped, connecting the same upwardly directed cooling water outlet holes 4e with the same receiving cavity 41, or they can be linear, connecting cooling water outlet holes 4e at the same axial position. The vortex-shaped guide ribs 4i provide a certain degree of assistance during the rotation of the rotating water ring, allowing water to flow out of the cooling water outlet holes 4e more efficiently. The sum of the cross-sectional areas of all cooling water outlet holes 4e is smaller than the sum of the cross-sectional areas of all water inlet holes 4k, thereby ensuring sufficient and stable cooling water supply.

[0046] Furthermore, the limiting plate 4f is detachably fixed to the supporting ring body 4a by bolts, thereby facilitating the installation, disassembly and subsequent maintenance of the cooling water ring 4.

[0047] Example 6: This embodiment provides a nylon tube production device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0048] The supporting water ring 7 comprises: The outer fixing ring 7a is sleeved on one end of the cooling water ring 4; The limiting pressure ring 7b is arranged at one end of the outer fixing ring 7a close to the cooling water ring 4, and limits the middle part of the cooling water ring 4 on the outer fixing ring 7a; The outer positioning ring 7c is provided at the end of the outer fixing ring 7a away from the cooling water ring 4 and limits the end of the cooling water ring 4; Several cooling water inlet holes 7d are evenly distributed on the outer positioning ring 7c along the circumference; A plurality of dispersed holes 7e are evenly distributed around the outer fixing ring 7a, one end of which is connected to the cooling water inlet hole 7d and the other end is connected to the cooling channel of the cooling water ring 4; The outer retaining frame 7f is fixedly connected to the lower portion of the outer fixing ring 7a and is used to support the water cooler.

[0049] In this technical solution, the outer fixing ring 7a is sleeved on the outside of the receiving ring 4g of the cooling water ring 4, thereby ensuring support for the cooling water ring 4.

[0050] The limiting pressure ring 7b is detachably connected to one end face of the outer fixing ring 7a by bolts, and can limit and fix the limiting plate 4f of the cooling water ring 4 on the outer fixing ring 7a, thereby ensuring the stability of the connection between the cooling water ring 4 and the supporting water ring 7.

[0051] The outer positioning ring 7c is detachably connected to the other end face of the outer fixing ring 7a by bolts, and can limit the end of the receiving ring 4g of the cooling water ring 4, thereby further improving the stability of the installation of the cooling water ring 4.

[0052] The number of cooling water inlet holes 7d and cooling dispersion holes 7e is equal to the number of water injection holes 4k. At the same time, the cross-sectional areas of the cooling dispersion holes 7e and the cooling water inlet holes 7d are both greater than or equal to the cross-sectional area of the water injection holes 4k to ensure the pressure, flow rate, flow velocity of the cooling water and the effect of spraying into the cooling ring body 4c; the other end of the dispersion hole 7e is connected to the receiving groove 4j of the cooling channel, so that the cooling water can also smoothly enter the water injection hole 4k during the rotation of the rotating water ring.

[0053] The outer retaining frame 7f is fixed to the outer fixing ring 7a by welding, and the supporting water ring 7 is fixed to the cooling collection box 1 through the outer retaining frame 7f.

[0054] Example 7: This embodiment provides a nylon tube production device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0055] The supporting water ring 7 also includes: The outer socket 7g is fixedly arranged outside the outer fixing ring 7a, and has a water inlet formed at its lower end connected to the cooling delivery pump through a pipeline; Several water distribution pipes 7h are evenly distributed around the outer edge of the outer fixing ring, one end of which is connected to the outer socket 7g and the other end is connected to the cooling water inlet 7d; The first support assembly 7i is arranged between the limiting pressure ring 7b and the cooling water ring 4; The second support assembly 7j has a support groove formed in the outer fixing ring 7a. The second support assembly 7j is arranged on the support groove and is located between the outer fixing ring 7a and the cooling water ring 4; The end seal 8 is provided between the inner wall of the limiting pressure ring 7b and the end of the cooling water ring 4; A plurality of rotary seals 9 are respectively arranged on the inner wall and end surface of the outer fixed ring 7a in contact with the cooling water ring 4.

[0056] In this technical solution, the external receiving pipe 7g is used to receive the cooling water pumped by the cooling delivery pump and evenly distribute the cooling water to each water distribution pipe 7h, and then enter the cooling water inlet hole 7d.

[0057] The first support assembly 7i includes a support bearing, which is arranged between the limit pressure ring 7b and the limit plate 4f, so as to ensure that the outer cooling ring can rotate smoothly relative to the support water ring 7, and the second support assembly 7j includes multiple support bearings, so as to better support the receiving ring 4g of the outer cooling ring, further ensuring the stable and smooth rotation of the outer cooling ring.

[0058] The provision of the end seal 8 can improve the sealing effect of the contact between the outer fixed ring 7a and the receiving ring 4g; the provision of the rotary seal 9 can improve the sealing performance of the connection between the outer fixed ring 7a and the limit plate 4f and the receiving ring 4g in the cooling water ring 4; thereby ensuring that the coolant will not overflow and affect the cooling effect.

[0059] Example 8: This embodiment provides a nylon tube production device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0060] The end seal 8 comprises: The end seal body 8a is annular and is arranged at the end of the cooling water ring 4 and is supported by the outer limit ring; The limiting groove 8b is formed on the inner wall of the end seal body 8a and close to one end of the cooling water ring 4. The cooling water ring 4 is formed with a limiting edge that cooperates with it; The middle guide section 8c is formed in the middle of the end seal body 8a and has an outward-expanding conical surface; The outer guide section 8d is formed at one end of the end sealing body 8a away from the limiting groove 8b, and has a cross-section that is an outwardly expanding arc surface; An end limiting portion of the end sealing body 8a is formed on the outer positioning ring 7c, and the end limiting portion is an outwardly expanding conical surface.

[0061] In this technical solution, the limiting groove 8b cooperates with the limiting edge to ensure the stability of the connection between the end seal 8 and the receiving ring 4g in the cooling water ring 4; the middle guide section 8c is connected with the outer row hole 4h of the receiving ring 4g, which plays a transition effect; at the same time, the outer guide section 8d cooperates with the end limiting part to facilitate the discharge of cooling water in the outer row hole 4h.

[0062] Example 9: This embodiment provides a nylon tube production device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0063] The rotary seal 9 comprises: The rotary sealing body 9a has a cylindrical structure; Several sealing edges 9b are in the shape of protruding arcs and are evenly distributed on the sealing surfaces on both sides of the rotary sealing body 9a; Several sealing grooves 9c are evenly arranged on the sealing surfaces of both sides of the rotary sealing body 9a, and the sealing grooves 9c on one sealing surface of the rotary sealing body 9a correspond to the sealing edges 9b on the other sealing surface; The reinforced sealing body 9d has a triangular cross section and is provided on each sealing placement groove 9c, and the end portion extending out of the sealing placement groove 9c is arc-shaped.

[0064] In this technical solution, a rotating contact groove for accommodating the rotating seal 9 is provided on the end surface or wall surface where the outer fixing ring 7a contacts the limiting plate 4f and the receiving ring 4g.

[0065] The rotary sealing body 9a is made of rubber or other materials suitable for sealing rings. The rotary sealing body 9a is arranged in the rotary contact groove to support the rotary seal 9; the protruding sealing edge 9b arranged on the rotary sealing body 9a is used to contact the bottom of the rotary contact groove and the limit plate 4f or the receiving ring 4g, thereby achieving a flexible sealing effect; and the provided sealing placement groove 9c is used to place the reinforced sealing body 9a. The reinforced sealing body 9a is made of metal material. A hard seal is performed by the reinforced sealing body 9a, and the flexible seal of the sealing edge 9b can ensure the overall sealing effect of the rotary seal 9; at the same time, the end of the reinforced sealing body 9d extending out of the sealing placement groove 9c is arc-shaped, so that it contacts the limit plate 4f or the receiving ring 4g through the arc surface, which can reduce wear while ensuring the sealing effect.

[0066] Example 10: This embodiment provides a nylon tube production device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0067] A water ring sealing groove 11 is provided on the end surface where the limiting plate 4f is connected to the outer supporting ring body 4a, and a water ring sealing member 10 is provided on the water ring sealing groove 11; The water ring seal 10 comprises: The outer sealing body 10a is an annular structure with an arc-shaped cross section, and the two sides of the arc are in sealing contact with the end face of the outer support ring body 4a and the inner wall of the water ring sealing groove 11 respectively; An inner sealing body, disposed within the outer sealing body 10a and supporting the outer sealing body 10a; The inner seal includes: The lower sealing portion 10b is located outside the outer sealing body 10a; a convex arc-shaped portion 10c is formed at its bottom and contacts the groove wall of the water ring sealing groove 11; and protruding annular portions 10d are formed on both sides, respectively contacting the inner wall of the water ring sealing groove 11 and the end face of the outer support ring body 4a; The upper sealing portion 10e is formed on the upper part of the lower sealing portion 10b and is located inside the outer sealing body 10a. A protruding upper sealing rib 10f is formed on its top and is in sealing contact with the end of the inner wall of the outer sealing body 10a. Side sealing ribs 10g are formed on its two sides and are in sealing contact with the two sides of the inner wall of the outer sealing body 10a.

[0068] In this technical solution, the water ring sealing groove 11 is provided on the end surface of the cooling water ring 4 in contact with the middle limiting plate 4f, and the end surface of the limiting plate 4f abuts against the end surface of the outer supporting ring body 4a.

[0069] During the process of fixing the cooling water ring 4 to the outer support ring body 4a, the outer sealing body 10a will be squeezed and deformed, allowing the outer sealing body 10a to better contact the inner wall of the water ring sealing groove 11 and the end face of the outer support ring, thereby achieving a preliminary sealing effect; the inner sealing body is provided to support the outer sealing body 10a.

[0070] At the same time, the end of the lower sealing portion 10b in the inner sealing body contacts the inner groove portion of the water ring sealing groove 11, and the annular portions 10d on both sides contact the inner wall of the water ring sealing groove 11 and the end face of the outer support ring body 4a respectively. In the process of fixing the cooling water ring 4 to the outer support ring body 4a, the lower sealing portion 10b is prompted to be axially extruded, so that the lower sealing portion 10b can better and more closely fit the inner groove wall of the water ring sealing groove 11, and the annular portions 10d on both sides firmly fit the inner wall of the water ring sealing groove 11 and the end face of the outer support ring body 4a, thereby further improving the sealing effect of the contact between the cooling water ring 4 and the outer support ring body 4a.

[0071] The upper sealing rib 10f of the upper sealing part 10e is fitted with the inner wall end of the outer sealing body 10a, and the side sealing ribs 10g on both sides of the upper sealing part 10e are fitted with both sides of the inner wall of the outer sealing body 10a. During the process of fixing the cooling water ring 4 to the outer supporting ring body 4a, it is extruded and deformed, so that the upper sealing rib 10f and the side sealing rib 10g are more closely fitted with the inner wall of the outer sealing part, thereby ensuring the sealing of the contact between the outer sealing body 10a and the inner sealing body, and thus improving the overall sealing effect of the water ring seal 10.

[0072] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A production process for nylon tubes, characterized in that: include: Step 1: adding raw materials including nylon resin, amino-modified carbon nanotubes and antioxidant into a mixer in proportion and mixing to obtain a mixed material; Step 2: feeding the mixture obtained in step 1 into a screw extruder, performing melt blending and extrusion, and granulating to obtain tube-making particles; Step 3: Using the tube-making particles obtained in step 2 as raw materials, feeding them into a screw extruder for extrusion molding; Step 4: After the extruded tube is shaped by a sizing sleeve, it is gradually cooled by a step-by-step cooling method to obtain a nylon tube; Step 5: Cut the nylon tube according to the specifications.

2. A production equipment suitable for the production process of the nylon tube according to claim 1, characterized in that: The tube blank after shaping in step 4 is cooled by a multi-stage cooling device, which includes: A plurality of water cooling modules (100) are arranged in sequence, and the temperature of the cooling water in the water cooling module (100) is lower the further away from the screw extruder; Each of the water cooling modules (100) comprises: A cooling collection box (1) is used to collect cooling water, and a support frame (2) is provided at the bottom thereof; A receiving water tank (3) is fixed on the support frame (2) and is used to receive and deliver cooling water collected from the cooling collection tank (1) in the adjacent water-cooling module (100); Water cooler, mounted on the cooling water tank.

3. The production equipment according to claim 2, characterized in that The water cooler comprises: A rotating water ring is formed with a channel for the nylon tube to pass through; Two supporting water rings (7), respectively arranged at both ends of the rotating water ring, and supporting the rotating water ring; Wherein said rotating water ring comprises: Two cooling water rings (4) are symmetrically arranged and offset from each other, and a cooling channel is formed therein for cooling water to pass through and be discharged; An outer transmission ring (5) is sleeved on the connection between the two cooling water rings (4) and radially limited thereto; Two outer clamping rings (6) are arranged at the connection of the two outer transmission rings (5), and the outer transmission ring (5) is axially fixed at the connection of the two cooling water rings (4).

4. The production equipment according to claim 3, characterized in that The cooling water ring (4) comprises: A supporting ring body (4a) is used to connect with the outer transmission ring (5), and a connecting through hole (4b) and a receiving hole are formed inside the supporting ring body from one end close to the outer transmission ring (5) to the other end; An outer cooling ring is arranged in the receiving hole of the support ring body (4a) and extends out of the receiving hole; A water ring seal (10) is provided at the connection between the outer support ring body (4a) and the outer cooling ring; The outer cooling ring comprises: A cooling ring body (4c) having a conical shell structure, disposed in the receiving hole and forming a receiving water chamber (4d) between the receiving hole; A plurality of cooling water outlet holes (4e) are evenly distributed on the cooling ring body (4c) and are connected to the receiving water chamber (4d); A limiting plate (4f) is integrally formed on one end of the cooling ring body (4c) away from the supporting ring body (4a) and abuts against the end surface of the supporting ring body (4a); The receiving ring (4g) is integrally formed at one end of the limiting plate (4f) away from the cooling ring body (4c), and has an outer row of holes (4h) formed therein that communicate with the interior of the cooling ring body (4c).

5. The production equipment according to claim 4, characterized in that The outer cooling ring further comprises: A plurality of guide ribs (4i) are evenly distributed on the outer wall of the cooling ring body (4c) along a circumference, and divide the receiving water chamber (4d) into a plurality of evenly distributed receiving cavities (4l); A receiving groove (4j) is provided on an end surface of the limiting plate (4f) away from the supporting ring body (4a); A plurality of water injection holes (4k) are evenly distributed along the circumference and connect the receiving groove (4j) and the receiving water chamber (4d), and the number of the water injection holes (4k) is equal to the number of the receiving chamber (4l).

6. The production equipment according to claim 3, characterized in that The supporting water ring (7) comprises: An outer fixing ring (7a) is sleeved outside one end of the cooling water ring (4); A limiting pressure ring (7b) is arranged at one end of the outer fixing ring (7a) close to the cooling water ring (4), and limits the middle part of the cooling water ring (4) on the outer fixing ring (7a); An outer positioning ring (7c) is arranged at one end of the outer fixing ring (7a) away from the cooling water ring (4) and limits the end of the cooling water ring (4); A plurality of cooling water inlet holes (7d) are evenly distributed on the outer positioning ring (7c) along a circumference; A plurality of dispersed holes (7e) are evenly distributed in a circumferential manner within the outer fixed ring (7a), and one end of each of the dispersed holes is connected to the cooling water inlet hole (7d) and the other end is connected to the cooling channel. The outer retaining frame (7f) is fixedly connected to the lower portion of the outer fixing ring (7a) and is used to support and fix the water ring (7).

7. The production equipment according to claim 6, characterized in that The supporting water ring (7) further comprises: An external socket (7g) is fixedly arranged outside the external fixing ring (7a), and a water inlet is formed at its lower end; A plurality of water distribution pipes (7h) are evenly distributed on the outer edge of the outer fixed ring along the circumference, and one end of the water distribution pipes is connected to the outer receiving pipe (7g) and the other end is connected to the cooling water inlet hole (7d); A first support assembly (7i) is arranged between the limiting pressure ring (7b) and the cooling water ring (4); A second support assembly (7j) is formed with a support groove in the outer fixing ring (7a), and the second support assembly (7j) is arranged on the support groove and located between the outer fixing ring (7a) and the cooling water ring (4); An end seal (8) is provided at the inner wall of the limiting pressure ring (7b) and the end of the cooling water ring (4); and a plurality of rotary seals (9) are respectively provided on the inner wall and end surface of the outer fixed ring (7a) in contact with the cooling water ring (4).

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