Bubble eliminating structure of polyethylene plastic pipe production line

Abstract

The utility model discloses a bubble eliminating structure of a polyethylene plastic pipe production line, which comprises a front group of fixing pieces and a rear group of fixing pieces, a plurality of groups of discs are arranged between the two groups of fixing pieces, meshing parts are arranged on the outer sides of the discs, and the plurality of groups of discs are connected into a whole through connecting rods to form a bubble eliminating assembly. The two ends of the bubble eliminating assembly are slidably installed on the two sets of fixing pieces through annular sliding rails. The utility model relates to the technical field of pipe production, in particular to a bubble eliminating structure of a polyethylene plastic pipe production line, which is improved from two directions: firstly, a progressive sizing hole size design is adopted, namely, the size of a sizing hole is gradually reduced from the front end to the rear end, so that the pressure of the sizing hole at the front end is reduced, and the production efficiency is improved; due to the fact that the size of the sizing hole in the front end is large, only large-size bubbles are scraped, small-size bubbles flow into the rear end and are scraped by the sizing hole in the rear end, and therefore loss of the disc at the front end is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of pipe manufacturing technology, specifically to a bubble elimination structure for a polyethylene plastic pipe production line. Background Technology

[0002] Because PPR pipes need to be cooled and sized in a vacuum chamber during the forming process, the cooling water enters the vacuum chamber by spraying. Under the vacuum, the cooling water circulates and cools the pipe. As the water splashes, many bubbles are generated. These bubbles stick to the surface of the pipe. Since the surface of the pipe still has some residual heat at this time, after subsequent cooling, "pinholes" will appear on the surface of the pipe, affecting the quality of the pipe surface and its pressure resistance.

[0003] A search revealed that Chinese authorized patent CN217258293 U discloses a device for eliminating air bubbles on the surface of pipes. It scrapes away "pinholes" through spaced sizing holes and reduces water resistance through water flow holes, thereby reducing the generation of air bubbles.

[0004] The above-mentioned device still has some shortcomings in actual operation and needs to be improved. First, the sizing holes of its multiple bubble elimination components are the same size, and the contact sequence between the pipe and the elimination components is different. This leads to severe wear and tear on the elimination components at the front, which requires frequent replacement. Second, the position of the elimination components is fixed, and the cleaning effect on "pinholes" is limited by the friction between the two. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a bubble elimination structure for a polyethylene plastic pipe production line, which solves the problems of severe wear and limited bubble elimination effect of existing pipe bubble elimination structures.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a bubble elimination structure for a polyethylene plastic pipe production line, comprising two sets of fixing members, one in front and one in back, with multiple sets of discs arranged between the two sets of fixing members. The outer side of the discs is provided with an engagement part. The multiple sets of discs are connected to each other by connecting rods to form a bubble elimination assembly. Both ends of the bubble elimination assembly are slidably mounted on the two sets of fixing members by annular slide rails.

[0009] The drive assembly is a gear set containing the same number of drive gears as the disc, with each drive gear meshing with a corresponding meshing part of the disc.

[0010] The disc has a sizing hole in the middle, a scraping layer on the sizing hole, and multiple water flow holes on the disc, which are distributed around the sizing hole.

[0011] As a further preferred embodiment, the radius of the sizing hole decreases sequentially with increasing distance from the pipe inlet.

[0012] As a further preferred embodiment, at least one disc is provided with a rotatable auxiliary support wheel.

[0013] As a further preferred embodiment, the drive assembly is driven by an external motor.

[0014] (III) Beneficial Effects

[0015] This invention provides a bubble elimination structure for a polyethylene plastic pipe production line. It has the following beneficial effects:

[0016] The bubble elimination structure of this polyethylene plastic pipe production line has been improved in two ways. First, we adopted a progressive sizing hole size design, that is, the size of the sizing hole decreases from the front end to the rear end. The purpose of this design is to reduce the pressure on the sizing hole at the front end. Since the size of the sizing hole at the front end is relatively large, only large-volume bubbles are scraped off, while small-volume bubbles flow into the rear end and are scraped off by the sizing hole at the rear end, thereby greatly reducing the wear of the front disc. Furthermore, the bubble elimination component has been changed from a traditional fixed structure to a rotatable structure. During the rotation, a certain radial force is generated, which can improve the bubble removal effect. Attached Figure Description

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

[0018] Figure 2 This is a schematic diagram of the disc structure of this utility model.

[0019] In the diagram: 1. Fixing component; 2. Disc; 3. Circular slide rail; 4. Connecting rod; 5. Meshing part; 6. Gear set; 7. Drive gear; 8. Sizing hole; 9. Scraping layer; 10. Water flow hole; 11. Auxiliary support wheel. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figure 1-2As shown, this utility model provides a technical solution: a bubble elimination structure for a polyethylene plastic pipe production line, comprising two sets of fixing members 1 (one in front and one in back). Figure 1 For ease of demonstration, only one set of fixing components 1 is shown. Between the two sets of fixing components 1, there are multiple sets of discs 2 (which are concentrically arranged with the fixing components 1). At least one disc 2 is provided with a rotatable auxiliary support wheel 11. Multiple sets of auxiliary support wheels 11 can be provided without obstructing the water flow hole 10. The maximum number can be the same as the number of discs, and the minimum is one set. This set of auxiliary support wheels 11 is generally installed on the last disc 2. Its function is to support the pipe so that it moves smoothly and does not deviate or shake.

[0022] The outer side of the disc 2 is provided with a meshing part 5 (i.e., a meshing tooth). Multiple discs 2 are connected to each other by a connecting rod 4 to form a bubble elimination assembly. Both ends of the bubble elimination assembly are slidably mounted on two sets of fixing parts 1 via annular slide rails 3. A through groove (not shown in the figure) is provided in the middle of the fixing part 1 to allow the pipe to enter and exit.

[0023] The drive assembly is driven by an external motor. The drive assembly is a gear set 6, which contains the same number of drive gears 7 as the disc 2. The multiple drive gears 7 mesh one-to-one with the meshing part 5 of the disc 2.

[0024] The disc 2 has a sizing hole 8 in the middle. The radius of the sizing hole 8 decreases from the front end to the rear end. A scraping layer 9 is provided on the sizing hole 8 (the scraping layer 9 is generally a sanding belt, which is fixed to the sizing hole 8 by adhesive. All scraping layers 9 have the same thickness, such as 1.0 mm). The disc 2 also has multiple water flow holes 10, which are distributed around the sizing hole 8.

[0025] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0026] In use, the tube is inserted into the middle of the front fixing part 1, passes through the bubble elimination component, and then exits from the rear fixing part 1. The entire device is located inside the vacuum chamber (not shown in the figure, existing technology can be used).

[0027] An external motor drives the gear set 6 to rotate, which in turn drives the entire bubble removal assembly to rotate along the axis of the fixing part 1 through each drive gear 7. The radial force generated during the rotation and the friction between the scraping layer 9 and the pipe are used to clean the bubbles.

[0028] Because the sizing hole 8 at the front end is relatively large, it is generally difficult to reach small air bubbles on the pipe surface. That is, the sizing hole 8 at the front end mainly scrapes off large air bubbles, while the sizing hole 8 at the rear end mainly scrapes off small air bubbles. In this way, the division of labor is clear, which reduces the pressure on the sizing hole 8 at the front end.

[0029] In summary, the bubble elimination structure of this polyethylene plastic pipe production line has been improved in two ways. First, we adopt a progressive sizing hole size design, that is, the size of the sizing hole decreases from the front end to the rear end. The purpose of this design is to reduce the pressure on the sizing hole at the front end. Since the size of the sizing hole at the front end is relatively large, only large-volume bubbles are scraped off, while small-volume bubbles flow into the rear end and are scraped off by the sizing hole at the rear end, thereby greatly reducing the wear of the front disc. Furthermore, the bubble elimination component has been changed from a traditional fixed structure to a rotatable structure. During the rotation, a certain tangential force is generated, which can improve the bubble removal effect.

[0030] It should be noted that all electrical components mentioned in this article are electrically connected to an external main controller and 220V or 380V AC mains power. The main controller can be a conventional, known device such as a computer, and its control principles, internal structure, and control switching methods are all conventional methods of existing technology. These are directly cited here without further elaboration. In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bubble elimination structure for a polyethylene plastic pipe production line, characterized by: It includes two sets of fixing parts (1) in front and behind, and multiple sets of discs (2) are arranged between the two sets of fixing parts (1). The outer side of the discs (2) is provided with a meshing part (5). The multiple sets of discs (2) are connected to each other by a connecting rod (4) to form a bubble elimination assembly. Both ends of the bubble elimination assembly are slidably mounted on the two sets of fixing parts (1) by a ring slide rail (3). The drive assembly is a gear set (6), which includes the same number of drive gears (7) as the disc (2), and the multiple drive gears (7) mesh with the meshing part (5) of the disc (2) in a one-to-one correspondence. A sizing hole (8) is provided in the middle of the disc (2), and a scraping layer (9) is provided on the sizing hole (8). Multiple water flow holes (10) are also provided on the disc (2), and the water flow holes (10) are distributed around the sizing hole (8).

2. The bubble elimination structure of a polyethylene plastic pipe production line according to claim 1, characterized in that: The radius of the sizing hole (8) decreases sequentially from the front end to the rear end.

3. The bubble elimination structure of a polyethylene plastic pipe production line according to claim 1, characterized in that: At least one disc (2) is provided with a rotatable auxiliary support wheel (11).

4. The bubble elimination structure of a polyethylene plastic pipe production line according to claim 1, characterized in that: The drive assembly is driven by an external motor.

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