A cooling device for polypropylene pipes

Abstract

This utility model discloses a cooling device for polypropylene pipes, relating to the field of pipe manufacturing technology. It includes a base, with a cooling component fixedly installed on the top of the base, and a conveying mechanism disposed on the top of the base and cooperating with the cooling component. The conveying mechanism includes a conveying component for driving the polypropylene pipe axially and a clamping and rotating component for driving the polypropylene pipe circumferentially. This utility model drives the pipe to rotate circumferentially through the clamping and rotating component, and, in conjunction with nozzles evenly distributed on the inner circumferential wall of the annular pipe, ensures that cold air covers the pipe surface comprehensively without dead angles, improving the quality stability of the pipe. The device can adaptively adjust the contact force between the rollers and the pipe according to different diameter polypropylene pipes, adapting to various pipe specifications without replacing parts, thus improving the versatility and production flexibility of the device.

Description

Technical Field

[0001] This utility model relates to the field of pipe manufacturing technology, specifically to a cooling device for polypropylene pipes. Background Technology

[0002] In the production process of polypropylene pipes, polypropylene material is heated to a molten state using an extruder, then extruded through a specific mold, followed by cooling, shaping, and cutting processes to finally obtain the finished polypropylene pipe. However, current polypropylene pipe cooling devices have revealed many significant shortcomings in practical applications: existing cooling devices struggle to achieve uniform cooling of the surface of tubular polypropylene pipes, easily leading to stress concentration and deformation, severely affecting the quality and performance of the pipes. They may even result in incomplete cooling in some areas, leaving residual internal stress and posing safety hazards for subsequent use. Furthermore, most existing cooling devices employ fixed structures or simple adjustment methods, making it difficult to flexibly adapt to polypropylene pipes of different sizes. This lack of size adaptability limits the versatility and production efficiency of cooling devices, increasing equipment investment and production costs for enterprises.

[0003] Therefore, we propose a novel polypropylene pipe cooling device to address the shortcomings of existing technologies and improve cooling quality and production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a cooling device for polypropylene pipes, which aims to solve the problems of poor cooling effect and inability to adapt to different specifications of pipe fittings in the above-mentioned background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a cooling device for polypropylene pipes, comprising a base, a cooling assembly fixedly installed on the top of the base, and a conveying mechanism disposed on the top of the base and cooperating with the cooling assembly. The conveying mechanism includes a conveying assembly for driving the polypropylene pipe to be conveyed axially and a clamping and rotating assembly for driving the polypropylene pipe to rotate circumferentially. The conveying assembly includes a plurality of fixed support frames spaced apart on the base along the axial direction of the polypropylene pipe. A conveying roller is rotatably mounted on the top of the fixed support frame. The clamping and rotating assembly includes a movable support frame and a roller. The movable support frame is slidably connected to the base. The number of movable support frames is the same as the number of fixed support frames and they are spaced and staggered on the left and right sides of the conveying roller. The roller is rotatably mounted on the top of the movable support frame and its outer circumferential wall abuts against the wall of the polypropylene pipe under the action of the movable support frame.

[0006] Furthermore, a limiting groove is formed on the surface of the base, and a slider that slides and slides in cooperation with the inner wall of the limiting groove is slidably installed on the inner side of the limiting groove. The movable support frame is fixedly connected to the top of the slider, and a compression spring is fixedly installed between the side of the slider away from the polypropylene pipe and the inner wall of the limiting groove.

[0007] Furthermore, the movable support frame includes a movable plate fixedly connected to the top of the slider, with vertical rods symmetrically arranged at both ends of the movable plate, and diagonal rods fixedly connected to the top of the vertical rods. The vertical rods and diagonal rods are integrally formed, and the roller is rotatably installed between the two diagonal rods.

[0008] Furthermore, the cooling assembly includes multiple connecting pipes and multiple sets of annular pipes. The multiple sets of annular pipes are coaxially spaced along the conveying direction of the polypropylene pipe and are fixedly installed on the base by a support plate. Several nozzles are evenly arrayed and connected on the inner circumferential wall of the annular pipes. The multiple sets of annular pipes are interconnected by connecting pipes.

[0009] Furthermore, the fixed support frame located at both ends is equipped with a first servo motor for driving the conveyor roller to rotate, and the multiple movable support frames located on the same side are each equipped with a second servo motor for driving the idler roller to rotate.

[0010] This utility model has the following beneficial effects:

[0011] This invention provides a cooling device for polypropylene pipes. A clamping and rotating assembly drives the pipe to rotate circumferentially. Combined with nozzles evenly spaced along the inner circumferential wall of the annular pipe, cold air can cover the pipe surface comprehensively without any blind spots. This solves problems such as stress concentration and deformation on the pipe surface caused by uneven cooling, improving the quality stability of the pipe. The device can adaptively adjust the contact force between the rollers and the pipe according to different diameter polypropylene pipes, adapting to various pipe specifications without replacing parts. This enhances the device's versatility and production flexibility, enabling batch and efficient cooling of pipes, shortening the production cycle, and improving overall production efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a side structural cross-sectional view of the present invention;

[0014] Figure 3 This is a cross-sectional side view of the location of the cooling ring in this utility model;

[0015] Figure 4 This is a cross-sectional side view of the location of the compression spring in this utility model;

[0016] In the diagram: 1. Base; 2. Fixed support frame; 3. Conveyor roller; 4. Movable support frame; 5. Idler roller; 6. Limiting groove; 7. Slider; 8. Compression spring; 9. Connecting pipe; 10. Annular pipe; 11. Support plate; 12. Nozzle. Detailed Implementation

[0017] like Figures 1 to 4 As shown, a cooling device for polypropylene pipe includes a base 1, a cooling component fixedly installed on the top of the base 1, and a conveying mechanism disposed on the top of the base 1 and cooperating with the cooling component. The conveying mechanism includes a conveying component for driving the polypropylene pipe to be conveyed axially and a clamping and rotating component for driving the polypropylene pipe to be rotated circumferentially.

[0018] The conveying assembly includes multiple fixed support frames 2 spaced apart on the base 1 along the axial direction of the polypropylene pipe. A conveying roller 3 is rotatably mounted on the top of the fixed support frame 2. The clamping and rotating assembly includes a movable support frame 4 and a roller 5. The movable support frame 4 is slidably connected to the base 1. The number of movable support frames 4 is the same as the number of fixed support frames 2 and they are arranged alternately on the left and right sides of the conveying roller 3. The roller 5 is rotatably mounted on the top of the movable support frame 4 and its outer circumferential wall abuts against the pipe wall of the polypropylene pipe under the action of the movable support frame 4. The multiple rollers 5 rotate in the same direction.

[0019] A limiting groove 6 is formed on the surface of the base 1. A slider 7 is slidably installed inside the limiting groove 6 and slides in cooperation with the inner wall of the limiting groove 6. A movable support frame 4 is fixedly connected to the top of the slider 7. A pre-compression spring 8 is fixedly installed between the side of the slider 7 away from the polypropylene pipe and the inner wall of the limiting groove 6. When pipes of different diameters enter the device, the compression spring 8 will adaptively expand and contract according to the pipe size, drive the slider 7 to move inside the limiting groove 6, push the movable support frame 4 and the roller to come close to the surface of the pipe, and combine the weight of the pipe to achieve a tight fit between pipes of different specifications, thereby improving the versatility of the device.

[0020] The movable support frame 4 includes a movable plate fixedly connected to the top of the slider 7. Vertical rods are symmetrically arranged at both ends of the movable plate, and diagonal rods are fixedly connected to the top of the vertical rods. The vertical rods and diagonal rods are integrally formed, and the roller 5 is rotatably installed between the two diagonal rods.

[0021] The cooling assembly includes multiple connecting pipes 9 and multiple sets of annular pipes 10. The multiple sets of annular pipes 10 are arranged coaxially at intervals along the conveying direction of the polypropylene pipe and are fixedly installed on the base 1 by a support plate 11. Several nozzles 12 are arranged in an evenly spaced array on the inner circumferential wall of the annular pipes 10 and are connected to each other. The multiple sets of annular pipes 10 are interconnected by connecting pipes 9; the cooling medium can be sprayed onto the surface of the pipe from all directions without dead angles.

[0022] The fixed support frame 2 at both ends is equipped with a first servo motor for driving the conveyor roller 3 to rotate. Multiple sets of movable support frames 4 on the same side are equipped with a second servo motor for driving the idler roller 5 to rotate (not shown in the figure). The first servo motor is fixedly installed on the fixed support frame 2 and its output end passes through the fixed support frame 2 and is fixedly connected to the rotating shaft at one end of the conveyor roller 3. The second servo motor is fixedly installed on the movable support frame 4 and its output end passes through the movable support frame 4 and is fixedly connected to the rotating shaft at one end of the idler roller 5. The conveyor roller 3 at both ends is the driving wheel, and the remaining conveyor rollers are the driven wheels, which ensures the axial transportation of the pipe. Multiple sets of idler rollers 5 on the same side are the driving wheels, and multiple sets of idler rollers 5 on the other side are the driven wheels, which realizes the circumferential rotation of the pipe.

[0023] The specific operation process of this utility model is as follows:

[0024] The extruded polypropylene pipe to be cooled enters the device from the conveying starting point and is placed between the conveying roller 3 of the conveying component and the idler roller 5 of the clamping rotating component. Under the elastic force of the compression spring 8, the moving support frame 4 drives the idler roller 5 to approach the pipe until the idler roller 5 is in close contact with the surface of the pipe, thus completing the adaptive clamping of the pipe.

[0025] Start the first servo motor to drive the active conveying rollers 3 at both ends to rotate. Through friction, the pipe moves slowly along the axial direction. Start the second servo motor to drive the active support roller 5 on the same side to rotate. Through friction, the pipe rotates circumferentially, ensuring that all areas of the outer surface of the pipe are covered by the cooling components. Connect the external air cooler. The cold air enters each group of annular pipes 10 through the connecting pipe 9 and is evenly sprayed onto the surface of the moving pipe through the nozzles 11 on the inner circumferential wall of the annular pipe 10.

[0026] Since the pipe is simultaneously conveyed axially and rotated circumferentially, the cooling medium sprayed from the nozzle 11 can cover the surface of the pipe in all directions without dead angles. Multiple sets of annular pipes 10 arranged at intervals along the conveying direction ensure that the pipe is continuously cooled throughout the conveying process. After being continuously cooled by multiple sets of annular pipes 10, the pipe is cooled and shaped, and is conveyed to the end of the device by the conveying roller of the conveying component, and then leaves the device to enter the cutting process.

Claims

1. A cooling device for polypropylene pipes, comprising a base (1), a cooling assembly is fixedly installed on the top of the base (1), characterized in that: It also includes a conveying mechanism set on the top of the base (1) and cooperating with the cooling assembly. The conveying mechanism includes a conveying assembly for driving the polypropylene pipe to be conveyed axially and a clamping and rotating assembly for driving the polypropylene pipe to rotate circumferentially. The conveying assembly includes a plurality of fixed support frames (2) spaced apart on the base (1) along the axial direction of the polypropylene pipe. A conveying roller (3) is rotatably mounted on the top of the fixed support frame (2). The clamping and rotating assembly includes a movable support frame (4) and a roller (5). The movable support frame (4) is slidably connected to the base (1). The number of movable support frames (4) is the same as the number of fixed support frames (2) and they are spaced and staggered on the left and right sides of the conveying roller (3). The roller (5) is rotatably mounted on the top of the movable support frame (4) and its outer circumferential wall abuts against the pipe wall of the polypropylene pipe under the action of the movable support frame (4).

2. Cooling device according to claim 1, characterized in that The base (1) has a limiting groove (6) on its surface. A slider (7) that slides and cooperates with the inner wall of the limiting groove (6) is slidably installed on the inner side of the limiting groove (6). The movable support frame (4) is fixedly connected to the top of the slider (7). A compression spring (8) is fixedly installed between the side of the slider (7) away from the polypropylene pipe and the inner wall of the limiting groove (6).

3. Cooling device according to claim 2, characterized in that The movable support frame (4) includes a movable plate fixedly connected to the top of the slider (7). Vertical rods are symmetrically arranged at both ends of the movable plate. An inclined rod is fixedly connected to the top of the vertical rod. The vertical rod and the inclined rod are integrally formed. The roller (5) is rotatably installed between the two inclined rods.

4. The cooling device of claim 1, wherein The cooling assembly includes multiple connecting pipes (9) and multiple sets of annular pipes (10). The multiple sets of annular pipes (10) are coaxially spaced along the conveying direction of the polypropylene pipe and are fixedly installed on the base (1) by a support plate (11). Several nozzles (12) are arranged in an evenly spaced array on the inner circumferential wall of the annular pipes (10) and are connected in a continuous manner. The multiple sets of annular pipes (10) are interconnected by connecting pipes (9).

5. The cooling device of claim 1, wherein, The fixed support frame (2) located at the front and rear ends is equipped with a first servo motor for driving the conveyor roller (3) to rotate, and the multiple movable support frames (4) located on the same side are equipped with a second servo motor for driving the idler roller (5) to rotate.

Images