An offline turning device for automated production of kraft tubes

The automated production process using offline turning equipment solves the problems of low efficiency and insufficient precision in traditional online processing, enabling high-precision turning and systematic production of carat pipes, and ensuring the sealing performance and ease of installation of the pipes.

CN224446160UActive Publication Date: 2026-07-03ZHEJIANG ZHONGCAI PIPELINE DERIVATIVES CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHEJIANG ZHONGCAI PIPELINE DERIVATIVES CO LTD
Filing Date
2025-08-20
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

In the existing production process of kraft pipes, traditional online machining is limited by the speed of the production line, making it difficult to achieve high-precision turning. Furthermore, online trimming is inefficient and inconsistent, leading to difficulties in pipe connection sealing and installation.

Method used

An offline turning device is adopted, including a feeding buffer, pre-alignment, turning and finishing buffer sections. It utilizes CNC lathes and hydraulic systems to realize automated turning of kraft tubes, eliminating production line speed limitations and improving processing flexibility and systemicity.

Benefits of technology

It enables high-precision turning of carat tubes, eliminates production line speed limitations, improves the systematicness and process stability of turning production, and ensures the sealing performance and ease of installation of the pipes.

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Abstract

This utility model belongs to the field of pipe manufacturing technology, and particularly relates to an offline turning device for automated production of kraft pipes, comprising a feeding buffer section, a pre-alignment section, a turning section, and a trimming buffer section. The feeding buffer section is used to buffer the kraft pipes to be turned; the pre-alignment section is used to pre-adjust the position of the kraft pipe along its length; the turning section is used to turn both ends of the kraft pipe; and the trimming buffer section is used to buffer the turned kraft pipe. Compared with online turning, this utility model eliminates the speed limitations of the production line, provides more flexible processing, more precise shrinkage dimensions, and allows for systematic feeding and turning, improving the process stability of turning production and resulting in better product compatibility of the kraft pipe sockets.
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Description

Technical Field

[0001] This utility model belongs to the field of pipe manufacturing technology, and in particular relates to an offline turning device for automated production of carat pipes. Background Technology

[0002] Krah pipe (high-density polyethylene (HDPE) spiral-reinforced pipe) is widely used in municipal drainage, sewage treatment, and industrial pipelines due to its advantages such as corrosion resistance, impact resistance, and light weight. In recent years, it has been widely used in municipal sewage pipe networks, expanding at an annual growth rate of 20%, and its development prospects are promising. With increasing environmental protection requirements and the need to upgrade urban underground pipe networks, the Krah pipe market continues to expand, and the requirements for production efficiency and product quality are becoming increasingly stringent.

[0003] Krah tubing is typically produced using a spiral winding process, but the finished tubing may have uneven surfaces, burrs, or dimensional discrepancies, requiring subsequent processing (such as turning) to meet connection sealing and installation requirements. The current production process for Krah tubing mainly includes the following steps: main winding, overhead crane lifting, physical cooling, machine turning, overhead crane lifting, demolding, manual shaping, and complete cooling.

[0004] Traditional online machining (such as online trimming) is limited by production line speed, making it difficult to achieve high-precision machining, while offline machining provides more flexible process adjustment space. It changes the traditional production mode of turning before demolding and realizes a new production mode of demolding before turning, solving the surface roughness caused by high-temperature turning and the quality problems caused by dimensional shrinkage after cooling.

[0005] The machining process for kraft pipes requires creating a smooth welding surface or socket at the connection end to ensure a tight seal when the pipes are joined. Current processing methods involve online machining before demolding, using manual finishing or simple machine tools, which is inefficient, inconsistent, and prone to leaks or installation difficulties. Utility Model Content

[0006] The purpose of this invention is to address the aforementioned technical problems by providing an offline turning device for automated production of carat tubes, which achieves the effect of systematically loading and unloading materials for turning, thereby improving the systematic nature of turning production.

[0007] In view of this, the present invention provides an offline turning device for automated production of carat tubes, comprising:

[0008] A feeding buffer section, wherein the feeding buffer section is used to buffer the carbide tube to be turned;

[0009] A pre-alignment section, which is used to pre-adjust the position of the carat tube along its length;

[0010] A turning section, which is used to turn both ends of the kraft tube;

[0011] A trimmed buffer segment is used to buffer the lamellar tube after turning.

[0012] In this technical solution, compared with online turning, the problem of production line speed limitation can be eliminated, the processing is more flexible, and the offline turning device can systematically load and unload materials for turning, improving the systematic nature of turning production.

[0013] Furthermore, the feeding buffer section includes a plurality of first inclined plates arranged in parallel with each other, with the end of the first inclined plate closer to the pre-alignment section being lower than the end farther from the pre-alignment section.

[0014] In this technical solution, the kraft tube can move forward without power in the feeding buffer section.

[0015] Furthermore, the pre-aligned segment includes:

[0016] A first support assembly, comprising multiple components, for supporting the kraft tube;

[0017] A pre-alignment component is used to pre-adjust the position of the kra tube along its length by pushing the end of the kra tube.

[0018] Furthermore, the pre-alignment assembly includes a pre-alignment base, on which a pre-alignment hydraulic cylinder is fixedly mounted. The piston rod of the pre-alignment hydraulic cylinder is parallel to the axis of the kraft tube within the pre-alignment section and points towards the end of the kraft tube.

[0019] In this technical solution, the first inclined plate of the material buffer section is intentionally tilted slightly towards the pre-alignment component end. When the kraft tube slides from the first inclined plate of the material buffer section onto the first support component, the kraft tube is always tilted to the left. The piston rod of the alignment hydraulic cylinder of the pre-alignment component extends and pushes the kraft tube to the right, thus achieving a pre-alignment effect.

[0020] Furthermore, the turning section includes:

[0021] The second support assembly, comprising multiple components, is used to support the kraft tube;

[0022] The CNC lathe has two parts, which are respectively set at both ends of the kraft tube. One CNC lathe is used to process the spigot of the kraft tube, and the other CNC lathe is used to process the socket of the kraft tube.

[0023] In this technical solution, after the kraft tube is attached to the second support assembly, the inner support chuck inside the CNC lathe supports the inner hole of the kraft tube, and then it is turned.

[0024] Furthermore, the first support component and the second support component have the same structure. The first support component includes a support base, on which are disposed:

[0025] V-shaped support plate, the lower end of which is fixedly connected to a rotating shaft, the rotating shaft being rotatably mounted on the rotating frame;

[0026] A balance support rod is fixedly installed, with one end connected to a support base and the other end of the balance support rod having an inclined block that matches the V-shaped support plate.

[0027] A lifting hydraulic cylinder is fixedly mounted on a support base, and its output end is fixedly connected to the rotating frame to drive the rotating frame to move up and down.

[0028] A tilting motor is fixedly connected to the rotating frame, and the output end of the tilting motor is connected to the rotating shaft, which is used to rotate and tilt the rotating shaft and the V-shaped support plate.

[0029] In this technical solution, during normal operation, the kraft tube is supported inside the V-shaped support plate, and the balance support rod is supported below the V-shaped support plate. When it is necessary to transfer the kraft tube inside the V-shaped support plate to the next section, the lifting hydraulic cylinder is activated to make the rotating frame lift the V-shaped support plate upward. Then, the tilting motor is activated to make the rotating shaft rotate and tilt the V-shaped support plate, so that the kraft tube on the V-shaped support plate can slide off.

[0030] Furthermore, the lower end of the second support component of the turning section is connected to the linear module, which is used to drive the second support component to move between the pre-alignment section and the weighing section.

[0031] Furthermore, the trimming buffer segment includes multiple second inclined plates arranged in parallel to each other, with the second inclined plates having the same inclination direction as the first inclined plates.

[0032] The beneficial effects of this utility model are:

[0033] 1. Compared with online turning, it can eliminate the problem of production line speed limitation, making processing more flexible and shrinkage dimensions more accurate. In addition, the offline turning device can systematically load and unload materials for turning, improving the process stability of turning production and providing better product compatibility for kraft pipe sockets.

[0034] 2. The first inclined plate facilitates the unpowered forward movement of the kraft tube in the feeding buffer section.

[0035] 3. When setting the time, the first inclined plate of the material buffer section is intentionally tilted slightly towards the pre-alignment component end. When the kraft tube slides from the first inclined plate of the material buffer section to the first support component, the kraft tube is always tilted to the left. The piston rod of the alignment hydraulic cylinder of the pre-alignment component extends and pushes the kraft tube to the right, thus achieving a pre-alignment effect.

[0036] 4. During normal operation, the kraft tube is supported inside the V-shaped support plate, and the balance support rod is supported below the V-shaped support plate. When it is necessary to transfer the kraft tube inside the V-shaped support plate to the next section, the lifting hydraulic cylinder is activated to make the rotating frame lift the V-shaped support plate upward. Then, the tilting motor is activated to make the rotating shaft rotate and tilt the V-shaped support plate, so that the kraft tube on the V-shaped support plate can slide down. Attached Figure Description

[0037] Figure 1 This is a perspective view of the present invention;

[0038] Figure 2 This is a top view of the present invention;

[0039] Figure 3 yes Figure 1 A magnified view of a section at point A in the middle;

[0040] Figure 4 This is a partial schematic diagram of the first support component;

[0041] Figure 5 yes Figure 4 Side view.

[0042] The markings in the diagram are as follows:

[0043] 1. Feeding buffer section; 2. Pre-alignment section; 3. Turning section; 4. Trimming buffer section; 5. First inclined plate; 6. First support assembly; 7. Pre-alignment base; 8. Pre-alignment hydraulic cylinder; 9. Second support assembly; 10. CNC lathe; 11. V-shaped support plate; 12. Rotary shaft; 13. Rotary frame; 14. Balance support rod; 15. Inclined block; 16. Lifting hydraulic cylinder; 18. Inclined motor; 19. Linear module; 20. Second inclined plate; 21. Weighing section. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0045] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0046] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0047] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0048] It should be noted that, in this application, 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. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0049] Example 1:

[0050] like Figure 1-5 As shown, an offline turning device for automated production of carat tubes includes:

[0051] Feeding buffer section 1, wherein the feeding buffer section 1 is used to buffer the carbide tube to be turned;

[0052] Pre-alignment segment 2, which is used to pre-adjust the position of the carbide tube in the length direction;

[0053] Turning section 3, which is used to turn both ends of the carbide tube;

[0054] Trim buffer segment 4, which is used to buffer the carbide tube after turning.

[0055] Compared to online turning, it eliminates the speed limitations of the production line, making processing more flexible. Furthermore, the offline turning device can systematically load and unload materials for turning, improving the systematic nature of turning production.

[0056] The feeding buffer section 1 includes multiple parallel first inclined plates 5, with the end of the first inclined plate 5 closer to the pre-alignment section 2 being lower than the end farther from the pre-alignment section 2. This facilitates the unpowered forward movement of the carbide tube on the feeding buffer section 1.

[0057] The pre-aligned segment 2 includes:

[0058] First support component 6, comprising multiple components, for supporting the carat tube;

[0059] A pre-alignment component is used to pre-adjust the position of the kra tube along its length by pushing the end of the kra tube.

[0060] The pre-alignment assembly includes a pre-alignment base 7, on which a pre-alignment hydraulic cylinder 8 is fixedly mounted. The piston rod of the pre-alignment hydraulic cylinder 8 is parallel to the axis of the lauryl tube within the pre-alignment section 2 and points towards the end of the lauryl tube. During setup, the first inclined plate 5 of the material buffer section is intentionally tilted slightly towards the pre-alignment assembly. When the lauryl tube slides from the first inclined plate 5 of the material buffer section 1 onto the first support assembly 6, the lauryl tube is always tilted to the left. The piston rod of the alignment hydraulic cylinder of the pre-alignment assembly extends and pushes the lauryl tube to the right, thus achieving a pre-alignment effect.

[0061] The turning section 3 includes:

[0062] Second support component 9, comprising multiple components, for supporting the carat tube;

[0063] There are two CNC lathes 10, which are respectively set at both ends of the kraft tube. One CNC lathe 10 is used to process the spigot of the kraft tube, and the other CNC lathe 10 is used to process the socket of the kraft tube.

[0064] After the kraft tube is placed onto the second support assembly 9, the inner support chuck inside the CNC lathe 10 supports the inner hole of the kraft tube, and then it is turned.

[0065] The first support component 6 and the second support component 9 have the same structure. The first support component 6 includes a support base, on which are provided:

[0066] V-shaped support plate 11v, the lower end of which is fixedly connected to rotating shaft 12, and rotating shaft 12 is rotatably mounted on rotating frame 13;

[0067] A balance support rod 14 is fixedly installed, with one end connected to a support base and the other end of the balance support rod 14 provided with an inclined block 15 that matches the V-shaped support plate 11v.

[0068] A lifting hydraulic cylinder 16 is fixedly mounted on a support base. The output end of the lifting hydraulic cylinder 16 is fixedly connected to the rotating frame 13 to drive the rotating frame 13 to move up and down.

[0069] The tilting motor 18 is fixedly connected to the rotating frame 13. The output end of the tilting motor 18 is connected to the rotating shaft 12 and is used to rotate and tilt the rotating shaft 12 and the V-shaped support plate 11v.

[0070] During normal operation, the kraft tube is supported inside the V-shaped support plate 11v, and the balance support rod 14 is supported below the V-shaped support plate 11v. When it is necessary to transfer the kraft tube inside the V-shaped support plate 11v to the next section, the lifting hydraulic cylinder 16 is activated to make the rotating frame 13 lift the V-shaped support plate 11v upward. Then, the tilting motor 18 is activated to make the rotating shaft 12 rotate and tilt the V-shaped support plate 11v, so that the kraft tube on the V-shaped support plate 11v can slide down.

[0071] The lower end of the second support component 9 of the turning section 3 is connected to the linear module 19, which is used to drive the second support component 9 to move between the pre-alignment section 2 and the weighing section 21.

[0072] The trimming buffer section 4 includes a plurality of second inclined plates 20 arranged in parallel with each other, and the second inclined plates 20 have the same inclination direction as the first inclined plate 5.

[0073] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An off-line turning device for automated production of Kevlar® tubes, characterized in that ,include: The loading buffer section (1) is used to buffer the carbide tube to be machined; Pre-alignment segment (2), the pre-alignment segment (2) is used to pre-adjust the position of the kraft tube in the length direction; Turning section (3), the turning section (3) is used to turn both ends of the kraft tube; Trimming buffer segment (4), which is used to buffer the carbide tube after turning.

2. The off-line turning device for automatic production of K-wire according to claim 1, characterized in that, The feeding buffer section (1) includes a plurality of first inclined plates (5) arranged in parallel with each other, with the end of the first inclined plate (5) closer to the pre-alignment section (2) lower than the end farther away from the pre-alignment section (2).

3. The off-line turning device for automatic production of K-wire according to claim 2, characterized in that, The pre-aligned segment (2) includes: First support assembly (6), comprising multiple components, for supporting the carat tube; A pre-alignment component is used to pre-adjust the position of the kra tube along its length by pushing the end of the kra tube.

4. The off-line turning device for automatic production of Kevlar tubes according to claim 3, characterized in that, The pre-alignment assembly includes a pre-alignment base (7), on which a pre-alignment hydraulic cylinder (8) is fixedly mounted. The piston rod of the pre-alignment hydraulic cylinder (8) is parallel to the axis of the kra tube in the pre-alignment section (2) and points towards the end of the kra tube.

5. The off-line turning device for automated production of Kevlar tubes according to claim 4, characterized in that, The turning section (3) includes: The second support assembly (9) includes multiple components for supporting the kraft tube; There are two CNC lathes (10), which are respectively set at both ends of the kraft tube. One CNC lathe (10) is used to process the spigot of the kraft tube, and the other CNC lathe (10) is used to process the socket of the kraft tube.

6. The off-line turning device for automated production of Kevlar tubes according to claim 5, characterized in that, The first support component (6) and the second support component (9) have the same structure. The first support component (6) includes a support base, on which are provided: V-shaped support plate (11v), the lower end of which is fixedly connected to a rotating shaft (12), the rotating shaft (12) being rotatably mounted on a rotating frame (13); Balance support rod (14), the balance support rod (14) is fixedly installed, one end is connected to the support base, and the other end of the balance support rod (14) is provided with an inclined block (15) that matches the V-shaped support plate (11v). Lifting hydraulic cylinder (16) is fixedly mounted on the support base. The output end of the lifting hydraulic cylinder (16) is fixedly connected to the rotating frame (13) to drive the rotating frame (13) to move up and down. Inclined motor (18), which is fixedly connected to the rotating frame (13), and the output end of the inclined motor (18) is connected to the rotating shaft (12) for rotating and tilting with the rotating shaft (12) and the V-shaped support plate (11v).

7. The off-line turning device for automated production of Kra tube according to claim 6, characterized in that, The lower end of the second support component (9) of the turning section (3) is connected to the linear module (19), which is used to drive the second support component (9) to move between the pre-alignment section (2) and the weighing section (21).

8. The off-line turning device for automated production of K-wire according to claim 7, wherein, The trimming buffer section (4) includes multiple second inclined plates (20) arranged in parallel with each other, and the second inclined plates (20) have the same inclination direction as the first inclined plate (5).