Plastic pipe cooling device with rotating spray structure

Abstract

The utility model discloses a plastic pipeline cooling device with rotary spraying structure, including frame, axial through type rotary spraying cavity and synchronous drive mechanism. Rotary spraying cavity is coaxially sleeved with rotary cylinder with guide convex strip, and the bottom is connected with support wheel group and drive motor through sprocket transmission mechanism, and both sides are equipped with limit wheel group to realize the stable operation of rotary cylinder. The inner wall of rotary cylinder is radially arranged with multiple adjustable spraying assemblies, including fluid distributor, double-angle spray head and flexible water supply pipeline, forming a circumferential staggered cooling water curtain. The supporting V-shaped feeding / discharging drive support is equipped with a spacing adjusting mechanism, and a closed-loop temperature control system is constructed by combining a PLC controller and an infrared temperature sensor. The device solves the problems of poor uniformity and water resource waste in traditional cooling process through rotary spraying and dynamic adjustment technology, and can adapt to efficient cooling of PVC pipelines of different diameters.

Description

Technical Field

[0001] This utility model relates to the field of plastic pipe processing, and in particular to a plastic pipe cooling device with a rotating spray structure. Background Technology

[0002] In the PVC pipe extrusion molding process, the formed pipes need to undergo a cooling and shaping process to complete crystallization and solidification. Traditional cooling processes often use fixed spray pipes or static water tank immersion methods, which have the following technical bottlenecks: 1. Uneven cooling problem: Fixed spray structures lead to uneven cooling around the pipe circumference. Due to regional temperature differences, PVC materials are prone to internal stress concentration, resulting in deviations in pipe ellipticity; 2. Insufficient dynamic process adaptability: Traditional cooling devices cannot match the continuous variable speed operation of the extrusion production line. During high-speed production, local cooling lag is prone to occur, leading to abnormal PVC crystal structure and affecting ring stiffness performance; 3. Low resource efficiency: Immersion cooling consumes as much as 8-10 m³ / h of water, and more than 90% of the cooling water is not recycled; Open spray systems cause serious water mist dispersion, and the humidity of the working environment is often >85%. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a plastic pipe cooling device with a rotating spray structure.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] This utility model discloses a plastic pipe cooling device with a rotating spray structure, comprising: a frame on which an axially continuous rotating spray chamber is provided; the rotating spray chamber includes: a rotating cylinder coaxially sleeved on the outside of the pipe to be cooled, the inner wall of which is provided with axially extending guide ribs; at least three sets of support wheels symmetrically distributed on the bottom circumference of the rotating cylinder, the support wheels being connected to a drive motor fixed on the frame via a sprocket transmission mechanism; limit wheels mounted on both sides of the frame, the polyurethane rollers of the limit wheels making rolling contact with the end face of the rotating cylinder; and at least two sets of... The spray assembly includes: multiple spray units evenly distributed circumferentially on the inner wall of the rotating cylinder, each spray unit being fixed by a radially sliding mounting base; a fluid distributor mounted on the mounting base, with a first nozzle and a second nozzle symmetrically arranged on both sides for adjustable spray angles; a flexible water supply pipeline connecting the fluid distributor to an external water supply system, wherein a flow regulating valve is connected in series on the flexible water supply pipeline; and V-shaped feed drive brackets and discharge drive brackets that can rotate synchronously at the feed end and discharge end of the frame, respectively, wherein the V-shaped feed drive brackets and discharge drive brackets have a spacing adjustment mechanism.

[0006] As a preferred embodiment of this utility model, a sealed reduction gearbox is provided between the drive motor and the support wheel assembly, and the output end of the reduction gearbox drives the shaft of the support wheel assembly through a sprocket transmission pair.

[0007] As a preferred embodiment of this utility model, the mounting base includes: a guide rail extending axially along the inner wall of the rotating cylinder; a slider assembly that slides with the guide rail and is fixed in position by a quick-locking mechanism; and a semi-circular adjusting bracket connecting the slider assembly and the fluid distributor.

[0008] As a preferred embodiment of this utility model, the limiting wheel assembly includes: a mounting base fixed on the frame; a spring buffer bracket fixed on the mounting base; and a polyurethane-coated roller mounted on the spring buffer bracket.

[0009] As a preferred technical solution of this utility model, the first and second nozzles of adjacent spray units are arranged in an alternating pattern around the rotating cylinder, and the spray coverage areas of each nozzle form an overlapping cooling zone around the pipe.

[0010] As a preferred embodiment of this utility model, it further includes: three sets of infrared temperature sensors installed on the feed side of the rotary drum; a PLC controller electrically connected to the temperature sensors, the controller being equipped with: a PID control module for controlling the opening of the flow regulating valve according to the temperature feedback signal; a frequency conversion control module for adjusting the speed of the drive motor; and an audible and visual alarm activated when the detected temperature exceeds the set value ±5℃.

[0011] As a preferred technical solution of this utility model, the flexible water supply pipeline is connected to: a sedimentation tank located at the bottom of the frame; a multi-stage filtration device connected to the sedimentation tank, which includes at least one layer of activated carbon filter; and a high-pressure circulating pump connecting the outlet of the multi-stage filtration device to the flexible water supply pipeline.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. The water flow is guided by the guide convex strip inside the rotating cylinder to form a spiral turbulence. Combined with the overlapping spray of staggered nozzles with a 20% coverage, the circumferential temperature difference of the Φ110mm pipe is less than 0.8℃.

[0014] 2. The modular spray assembly, combined with the radial sliding base, can be adapted to quick switching of pipe diameters from Φ50-400mm, reducing the production line specification changeover time to 8-10 minutes; the dual-angle nozzles enable dynamic compensation of the spray distance.

[0015] 3. The closed-loop temperature control system uses infrared sensors to provide real-time feedback and PID algorithms to intelligently adjust the water temperature, preventing the PVC from developing a "sharkskin" surface defect due to sudden cooling. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is the front view of this utility model;

[0019] Figure 3 This is a top view of the present invention;

[0020] Figure 4 This is a side view of the present invention;

[0021] Figure 5 This is a cross-sectional structural schematic diagram of the present invention;

[0022] In the diagram: 1. Frame; 2. Rotary spray chamber; 3. Feed drive support; 4. Discharge drive support; 21. Rotary cylinder; 22. Support wheel assembly; 23. Drive motor; 24. Limit wheel assembly; 25. Spray assembly; 26. Temperature sensor; 27. Controller; 28. Sedimentation tank; 29. ​​Multi-stage filtration device; 30. High-pressure circulating pump; 231. Gearbox; 232. Sprocket drive pair; 241. Mounting base; 242. Spring buffer support; 243. Rubber-coated roller; 251. Fluid distributor; 252. First nozzle; 253. Second nozzle; 254. Flexible water supply pipeline; 255. Flow regulating valve; 256. Guide rail; 257. Slider assembly; 258. Adjustment support. Detailed Implementation

[0023] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0024] In the attached diagram, all identical reference numerals refer to the same components.

[0025] like Figure 1-5As shown, this utility model provides a plastic pipe cooling device with a rotating spray structure. The frame 1 is a rectangular welded frame with an axially penetrating rotating spray chamber 2 at the top. A rotating cylinder 21 is coaxially fitted inside the chamber. Five axially extending guide ribs are evenly distributed on the inner wall of the rotating cylinder 21. The cross-section of the ribs is trapezoidal, which guides the cooling water to form a spiral flow path. Three sets of support wheel sets 22 are symmetrically installed on the bottom of the outer circumference of the rotating cylinder 21. Each set of support wheel sets 22 includes two rubber-coated drive wheels, which are connected to the output shaft of the drive motor 23 through a sprocket transmission pair 232. After being reduced in speed by a sealed reduction gearbox 231, the drive motor 23 drives the support wheel sets 22 to rotate the rotating cylinder 21 at a uniform speed via chain drive.

[0026] Limiting wheel sets 24 are symmetrically installed on both sides of the frame 1. Each limiting wheel set 24 includes: a mounting base 241, which is vertically fixed to the side plate of the frame 1 by bolts; a spring buffer bracket 242, which consists of two sets of cylindrical springs and connects the mounting base 241 and the roller bracket; and a polyurethane coated roller 243, which is assembled at the end of the roller bracket and forms elastic rolling contact with the end face of the rotating cylinder 21 to limit the axial movement of the rotating cylinder.

[0027] Two sets of spray assemblies 25 are arranged at intervals along the axial direction of the rotating cylinder 21. Each set contains five circumferentially distributed spray units. The specific structure includes: a guide rail 256: a horizontal track welded to the inner wall of the rotating cylinder 21 and extending axially; a slider assembly 257: a sliding module with built-in ball bearings, forming a radial sliding pair with the guide rail 256, and its position is locked by a butterfly bolt in a quick-locking mechanism; and a semi-circular adjusting bracket 258: connecting the slider assembly 257 and the fluid distributor 251, the bracket's curvature is adjustable to achieve spray angle correction.

[0028] Fluid distributor 251: a cylindrical cavity with a first nozzle 252 and a second nozzle 253 threadedly connected to both sides respectively. The nozzles are equipped with swirl vanes to control the water flow diffusion angle.

[0029] Flexible water supply pipeline 254: adopts a four-layer braided steel wire rubber hose, one end is connected to the inlet of fluid distributor 251, and the other end is connected to the outlet of high-pressure circulating pump 30 through flow regulating valve 255.

[0030] V-shaped drive bracket: Both the V-shaped feed drive bracket 3 at the feed end and the discharge drive bracket 4 at the discharge end are equipped with double rows of rollers. The roller spacing is changed by the screw nut spacing adjustment mechanism to adapt to the guidance of pipes with different diameters.

[0031] Temperature monitoring unit: Four sets of infrared temperature sensors 26 are installed on the feed side of the rotary drum 21, which are distributed in a 120° circumferential direction. The sensor probes are fixed by magnetic bases, and the signal lines are connected to the analog input port of PLC controller 27.

[0032] Water circulation system: The sedimentation tank 28 is located at the bottom of the frame 1. The inclined plate sedimentation area and the filtration area inside the tank are separated by a partition. The multi-stage filtration device 29 includes a stainless steel filter screen layer and an activated carbon adsorption layer. The treated cooling water is pressurized by the high-pressure circulation pump 30 and then transported to the spray assembly 25.

[0033] The method of using this utility model is as follows:

[0034] 1. After the PVC pipe to be cooled is introduced into the rotating drum 21 from the V-shaped feed drive bracket 3, the drive motor 23 drives the rotating drum 21 to rotate at a set speed through the support wheel set 22, and the polyurethane rollers 243 of the limit wheel set 24 compensate for the axial displacement of the rotating drum in real time.

[0035] 2. The high-pressure circulating pump 30 delivers the filtered cooling water to each spray unit through the flexible water supply pipeline 254. After the water flow is distributed by the fluid distributor 251, it is sprayed onto the outer wall of the pipeline by the first nozzle 252 and the second nozzle 253 in an alternating coverage pattern.

[0036] 3. The infrared temperature sensor 26 collects the surface temperature data of the pipeline in real time. The PID control module of the PLC controller 27 dynamically adjusts the opening of the flow regulating valve 255. At the same time, the frequency conversion control module adjusts the speed of the drive motor 23 to match the cooling intensity with the pipeline extrusion speed.

[0037] 4. After cooling, the pipe is discharged through the discharge drive bracket 4, and the circulating water flows back into the sedimentation tank 28 to complete filtration and reuse.

[0038] This utility model is a plastic pipe cooling device with a rotating spray structure. Through the synergistic effect of the rotating spray structure and the intelligent control system, it achieves efficient and uniform cooling of PVC pipes, and at the same time has the ability to adaptively adjust the pipe diameter to meet the needs of continuous production.

[0039] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A plastic pipe cooling device with a rotating spray structure, characterized in that, include: A frame (1) is provided with an axially penetrating rotating spray chamber (2); the rotating spray chamber (2) includes: a rotating cylinder (21) coaxially sleeved outside the pipe to be cooled, the inner wall of the rotating cylinder (21) being provided with axially extending guide ribs; at least three sets of support wheel sets (22) symmetrically distributed on the bottom circumference of the rotating cylinder (21), the support wheel sets (22) being connected to a drive motor (23) fixed on the frame (1) through a sprocket transmission mechanism; a limiting wheel set (24) installed on both sides of the frame (1), the polyurethane rollers of the limiting wheel set (24) rollingly contacting the end face of the rotating cylinder (21); at least two sets of spray components (25) arranged axially at intervals along the rotating cylinder (21), each set of spray components (25) 5) Includes: multiple spray units evenly distributed circumferentially on the inner wall of the rotating cylinder (21), each spray unit being fixed by a radially sliding mounting base; a fluid distributor (251) provided on the mounting base, with a first nozzle (252) and a second nozzle (253) symmetrically provided on both sides with adjustable spray angles; a flexible water supply pipeline (254) connecting the fluid distributor (251) to an external water supply system, wherein a flow regulating valve (255) is connected in series on the flexible water supply pipeline (254); the feed end and discharge end of the frame (1) are respectively provided with a synchronously rotating V-shaped feed drive bracket (3) and a discharge drive bracket (4), wherein the V-shaped feed drive bracket (3) and the discharge drive bracket (4) have a spacing adjustment mechanism.

2. A plastic pipe cooling device with a rotating spray structure according to claim 1, characterized in that, A sealed gearbox (231) is provided between the drive motor (23) and the support wheel assembly (22). The output end of the gearbox (231) drives the shaft of the support wheel assembly (22) through a sprocket transmission pair (232).

3. A plastic pipe cooling device with a rotating spray structure according to claim 1, characterized in that, The mounting base includes: a guide rail (256) extending axially along the inner wall of the rotating cylinder (21); a slider assembly (257) that slides with the guide rail (256) and is fixed in position by a quick-lock mechanism; and a semi-circular adjusting bracket (258) connecting the slider assembly (257) and the fluid distributor (251).

4. A plastic pipe cooling device with a rotating spray structure according to claim 1, characterized in that, The limiting wheel assembly (24) includes: a mounting base (241) fixed on the frame (1); a spring buffer bracket (242) fixed on the mounting base (241); and a polyurethane coated roller (243) mounted on the spring buffer bracket (242).

5. A plastic pipe cooling device with a rotating spray structure according to claim 1, characterized in that, The first nozzle (252) and the second nozzle (253) of the adjacent spray units are arranged in an alternating pattern around the rotating cylinder (21), and the spray coverage area of ​​each nozzle forms an overlapping cooling zone around the pipe.

6. A plastic pipe cooling device with a rotating spray structure according to claim 1, characterized in that, Also includes: Three sets of infrared temperature sensors (26) are installed on the feed side of the rotary drum (21); a PLC controller (27) is electrically connected to the temperature sensors (26), the controller (27) is equipped with: a PID control module for controlling the opening of the flow regulating valve (255) according to the temperature feedback signal; a frequency conversion control module for adjusting the speed of the drive motor (23); and an alarm is activated when the detected temperature exceeds the set value ±5℃.

7. A plastic pipe cooling device with a rotating spray structure according to claim 1, characterized in that, The flexible water supply pipeline (254) is connected to: a sedimentation tank (28) located at the bottom of the frame (1); a multi-stage filtration device (29) connected to the sedimentation tank (28), which includes at least one layer of activated carbon filter; and a high-pressure circulating pump (30) connecting the outlet of the multi-stage filtration device (29) to the flexible water supply pipeline (254).

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