A high-precision tapping device for large-diameter round pipes

Abstract

This utility model relates to the technical field of pipe drilling, specifically providing a high-precision drilling device for large-diameter circular pipes. The device includes a built-in frame and a CNC cutting mechanism. The built-in frame includes a pair of parallel first sides. The CNC cutting mechanism includes a crossbeam, a cutting torch assembly, and a control box. The crossbeam slides in conjunction with the pair of first sides. The cutting torch assembly is movably mounted on the crossbeam. The built-in frame is positioned on the inner wall of the circular pipe, ensuring that the area to be drilled is within the enclosure of the built-in frame. By integrating one direction (x-direction or y-direction) of the CNC cutting mechanism's cross slide onto the pair of sides of the built-in frame, and then placing the built-in frame inside the circular pipe, further adjustments are made to ensure the area to be drilled is within the enclosure of the built-in frame. This allows the CNC cutting mechanism to precisely complete the drilling operation inside the circular pipe, promoting the intelligentization of large-diameter pipe drilling construction.

Description

Technical Field

[0001] This utility model relates to the technical field of pipe opening, specifically to a high-precision opening device for large-diameter circular pipes. Background Technology

[0002] Round tubes are typically rolled into cylindrical shapes using a plate rolling machine and a hydraulic press. If holes are pre-drilled before rolling, deformation can easily occur in the drilled area, making it impossible to guarantee the roundness of the cylinder. Therefore, drilling the holes after rolling is the preferred method, as it ensures the roundness of the cylinder and allows for better control over the dimensional accuracy of the final drilled holes.

[0003] In recent years, many offshore wind power projects have emerged both domestically and internationally, involving numerous large-diameter pipe pile structures. These pipe piles typically feature cable holes, ventilation holes, and access holes. The dimensions of these openings generally require high precision. Due to the curved shape of the circular pipe wall, the shape and size of the openings are usually projected onto the pipe wall from a regular shape, resulting in an irregular outline on the pipe wall. The conventional approach is to first project the outer contour of the opening onto the pipe wall and draw the outline, then manually cut along the outline. This method has three drawbacks: first, errors are inevitable in the accuracy of the outline drawing, and the process is time-consuming; second, it's impossible to guarantee consistent cutting along the outline throughout the entire process, making it difficult to control cutting precision; and third, manual cutting easily creates pits on the cut surface, making it difficult to ensure a smooth surface. The usual remedial measure is to spend considerable manpower and time grinding and finishing after cutting until the opening size and cut surface meet the requirements. How to quickly create openings on circular pipes while ensuring the required dimensional accuracy has become a significant challenge in production. To solve this problem, this utility model designs a high-precision hole-opening device for large-diameter circular pipes. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a high-precision hole-opening device for large-diameter round pipes, which installs a small CNC cutting mechanism inside the round pipe through an internal frame to precisely open holes in the side wall of the round pipe.

[0005] To achieve the above and other related objectives, this utility model proposes a high-precision hole-opening device for large-diameter circular pipes, comprising:

[0006] An internal frame, the internal frame including a pair of parallel first sides;

[0007] CNC cutting mechanism, the CNC cutting mechanism comprising:

[0008] A crossbeam, which spans across a pair of first sides and slides in cooperation with the pair of first sides;

[0009] A cutting torch assembly, which is movably mounted on the crossbeam;

[0010] Control box, the control box being used to control the movement of the cutting torch assembly;

[0011] The built-in frame is disposed on the inner wall of the circular tube, such that the area to be drilled on the inner wall of the circular tube is located within the enclosure area defined by the built-in frame.

[0012] In one embodiment of the present invention, the lower end of the built-in frame is provided with an adjustable top support component.

[0013] In one embodiment of the present invention, the top support assembly includes hydraulic telescopic rods disposed at the four right angles of the built-in frame.

[0014] In one embodiment of this utility model, the lower end of the built-in frame is provided with a guide component that contacts the inner wall of the circular tube.

[0015] In one embodiment of the present invention, the guide assembly includes a universal bearing and a limiting wheel. The guide wheels are evenly arranged at the lower end of each of the first sides, and at least one limiting wheel is provided at the lower end of each of the first sides.

[0016] In one embodiment of this utility model, the first side of the built-in frame is arranged parallel to the axis of the circular tube.

[0017] In one embodiment of this utility model, a pair of linear guide rails are provided at the upper ends of a pair of first side edges, and the two ends of the crossbeam are respectively slidably engaged on the pair of linear guide rails by sliders.

[0018] In one embodiment of this utility model, the control box is disposed on one end of the crossbeam.

[0019] In one embodiment of this utility model, a laser positioning device is also included, which is used to project the outline of the hole to be opened onto the inner wall of the circular tube.

[0020] The beneficial technical effects of this utility model include at least the following:

[0021] This utility model proposes a high-precision drilling device for large-diameter circular pipes, comprising an internal frame and a digital cutting mechanism. One direction (x-direction or y-direction) of the cross slide of the CNC cutting mechanism is integrated on a pair of first sides of the internal frame. The internal frame is then placed inside the circular pipe, and further adjustments are made so that the area to be drilled is within the enclosure of the internal frame. The digital cutting mechanism is used to precisely complete the drilling operation inside the circular pipe, promoting the intelligentization of large-diameter pipe drilling construction. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a high-precision hole-opening device for a large-diameter circular pipe in one embodiment of the present invention.

[0024] Figure 2 This is a diagram showing the usage state of a high-precision hole-opening device for a large-diameter circular pipe in one embodiment of the present invention.

[0025] Labeling explanations: 1-Built-in frame; 11-First side; 2-CNC cutting mechanism; 21-Crossbeam; 22-Torch assembly; 23-Control box; 30-Round tube; 41-Hydraulic telescopic rod; 42-Universal bearing; 43-Linear guide rail. Detailed Implementation

[0026] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0027] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show the components related to this utility model and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0028] Please see Figure 1 and Figure 2As shown, to achieve the above-mentioned objectives and other related objectives, this utility model proposes a high-precision hole-opening device for large-diameter circular pipes, including an internal frame 1 and a CNC cutting mechanism 2. The internal frame 1 includes a pair of parallel first side edges 11; the CNC cutting mechanism 2 includes a crossbeam 21, a cutting torch assembly 22, and a control box 23. The crossbeam 21 spans across the pair of first side edges 11 and slides in cooperation with the pair of first side edges 11; the cutting torch assembly 22 is movably mounted on the crossbeam 21; the control box 23 is used to control the movement of the cutting torch assembly 22; wherein, the internal frame 1 is set on the inner wall of the circular pipe 30, so that the area to be opened on the inner wall of the circular pipe 30 is located within the enclosed area of ​​the internal frame 1.

[0029] It is understandable that the CNC cutting mechanism 2 of this utility model is a miniaturized CNC cutting machine, but it changes the design of the cross slide table of previous CNC cutting machines. One direction of the cross slide table (x-direction or y-direction) is integrated into the built-in frame 1, which can be square and set on the inner wall of the round tube 30. Precise CNC cutting can be performed directly inside the round tube 30, where the tube diameter can be 1.5m or more. It is evident that if traditional external equipment is used to open holes in the side wall of a large-diameter round tube 30, the equipment size would need to be over 3m, increasing equipment costs. Therefore, this utility model can save costs, and the use of the CNC cutting mechanism 2 for opening holes greatly improves the cutting quality, thereby enhancing the opening accuracy.

[0030] In one embodiment of this utility model, the lower end of the built-in frame 1 is provided with an adjustable top support assembly. The top support assembly includes hydraulic telescopic rods 41 disposed at the four right angles of the built-in frame 1.

[0031] It should be noted that the dimensions of the built-in frame 1 determine its working range. The hydraulic telescopic rods 41 at the four right angles form a spatially statically determinate support system, which can level the built-in frame 1 in a short time. If an integrated pressure sensor is used, the support force can be fed back in real time, preventing overload and deformation of the pipe wall of the circular tube 30. Therefore, while adjusting the deformation of the built-in frame 1, the top support assembly can also control the height of the cutting torch assembly 22 relative to the opening working surface, thus ensuring the opening working height and enabling the opening operation to be completed smoothly. When the top support assembly is used to lift the entire built-in frame 1, it can also prevent the built-in frame 1 from sliding.

[0032] In one embodiment of this utility model, the lower end of the built-in frame 1 is provided with a guide assembly that contacts the inner wall of the circular tube 30. The guide assembly includes a universal bearing 42 and a limiting wheel. The guide wheels are evenly arranged at the lower end of each first side 11, and each first side 11 has at least one limiting wheel at its lower end.

[0033] It should be noted that the combination of the universal bearing 42 and the limiting wheel forms a dual mechanism of active guidance and passive limiting. The universal bearing 42 enables omnidirectional movement, and the limiting wheel can adopt a V-groove rim, making linear contact with the inner wall of the circular tube 30 for radial positioning. The universal bearing 42 drives the built-in frame 1 to move radially or axially relative to the circular tube 30, adjusting the position of the built-in frame 1 so that its working range covers the area to be drilled. Depending on the specific requirements, the area to be drilled can be positioned in the middle of the built-in frame 1. Once the built-in frame 1 is adjusted to the appropriate position, the limiting wheel can be used to fix its position relatively before proceeding with the subsequent drilling work.

[0034] In one embodiment of the present invention, the first side 11 of the built-in frame 1 is arranged parallel to the axis of the circular tube 30.

[0035] It is understandable that the built-in frame 1 can be set as square, with its pair of first sides 11 arranged parallel to the axis of the round tube 30. Moving the built-in frame 1 can adjust the area to be drilled to the middle position of the built-in frame 1, further ensuring the accuracy of the drilling operation.

[0036] In one embodiment of the present invention, a pair of linear guide rails 43 are provided at the upper ends of a pair of first side edges 11, and the two ends of the crossbeam 21 are respectively slidably mounted on the pair of linear guide rails 43 by sliders.

[0037] It should be noted that the linear guide 43 can be made of high carbon steel rail combined with linear guide to reduce straightness error.

[0038] In one embodiment of this utility model, the control box 23 is disposed on one end of the crossbeam 21, which facilitates operation and observation by the staff.

[0039] It should be noted that the control box 23 includes a display screen and an operating table, and it integrates a CNC system. The CNC system can integrate a three-dimensional projection compensation algorithm to automatically convert the planar hole type (such as rectangle or circle) in the design drawing into the development path of the tube wall surface, and adjust the cutting speed in real time to maintain the stability of the molten pool.

[0040] The control box 23 integrates display, operation, and control functions, allowing operators to complete all parameter settings and process monitoring on-site during hole cutting. Compared to traditional separate control systems, this reduces wiring failure rates and improves operational efficiency. The box can be made of magnesium alloy die-casting, which ensures EMC protection levels while reducing weight compared to steel boxes.

[0041] In one embodiment of the present invention, a laser positioning device is also included, which is used to project the outline of the hole to be opened onto the inner wall of the circular tube 30.

[0042] When using the high-precision hole-opening device for large-diameter circular pipes according to this utility model to open holes in large-diameter circular pipes, the specific steps include the following:

[0043] First, the dimensions of the inner frame 1 are determined according to the size of the hole to be drilled, and then it is manufactured. The size of the inner frame 1 should be able to cover the entire area of ​​the hole to be drilled. The inner frame 1 is usually made of steel or aluminum and needs to have a certain strength to prevent deformation and bending.

[0044] Then, a pair of linear guide rails 43 and a miniaturized CNC cutting mechanism 2 are installed on a pair of first sides 11 of the fabricated built-in frame 1, and the mechanism is debugged to ensure that the CNC cutting mechanism 2 can operate normally.

[0045] Finally, the entire device is placed inside the round tube 30 that needs to be drilled. The position of the built-in frame 1 is moved by the universal bearing 42 so that the position to be drilled is located directly below the middle of the built-in frame 1. Then, the crossbeam 21 of the CNC cutting mechanism 2 is adjusted on a pair of linear guide rails 43, and the cutting torch angle of the cutting torch assembly 22 is adjusted.

[0046] Power on and debug the CNC cutting mechanism 2, check whether the travel path of the torch assembly 22 is correct. If there is a problem, make adjustments until the travel accuracy of the CNC cutting mechanism 2 meets the requirements. Import the cutting programming instructions of the shape to be opened into the control box 23 of the CNC cutting mechanism 2. After the trial run confirms that the position and size of the hole to be opened are correct, the ignition cutting can be carried out.

[0047] Therefore, this utility model provides a high-precision drilling device for large-diameter circular pipes, meeting the need for cutting and drilling holes in the walls of large-diameter circular pipes, especially for larger-sized holes and holes requiring high precision. The large-diameter circular pipes it operates on can include offshore wind power pipe piles, petrochemical pipelines, and municipal pipelines, etc., shortening cutting and drilling time and improving efficiency, thus promoting the intelligent transformation of large-scale pipeline construction.

[0048] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

[0049] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0050] Throughout this specification, references to "an embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the present invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention shown herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0051] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.

[0052] Furthermore, unless otherwise expressly stated, any arrows in the accompanying drawings should be considered illustrative only and not limiting. Additionally, unless otherwise stated, the term "or" as used herein is generally intended to mean "and / or". Where a term is anticipated to provide a separation or combination capability that is unclear, a combination of components or steps will also be considered as indicated.

[0053] As used herein and throughout the claims below, unless otherwise specified, “a” and “the” include the plural references. Similarly, as used herein and throughout the claims below, unless otherwise specified, “in” means “in” and “on”.

[0054] The above description of the embodiments shown in this utility model is not intended to be an exhaustive enumeration or to limit the utility model to the precise forms disclosed herein. Although specific embodiments and examples of the utility model have been described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the utility model, as will be recognized and understood by those skilled in the art. As indicated, these modifications can be made to the utility model in accordance with the above description of the embodiments of the utility model, and such modifications will be within the spirit and scope of the utility model.

[0055] This document has generally described the systems and methods in detail to aid in understanding the present invention. Furthermore, various specific details have been set forth to provide a general understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention can be practiced without one or more specific details, or using other devices, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0056] Therefore, although the present invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the above disclosure, and it should be understood that in some cases, certain features of the present invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the present invention. The present invention is not intended to be limited to the specific terms used in the following claims and / or the specific embodiments disclosed as the best mode of carrying out the present invention, but the present invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the present invention will be determined only by the appended claims.

Claims

1. A high-precision hole-opening device for large-diameter circular pipes, characterized in that, include: Built-in frame (1), the built-in frame (1) includes a pair of parallel first sides (11); CNC cutting mechanism (2), the CNC cutting mechanism (2) includes: A crossbeam (21) spans across a pair of first side edges (11) and slides with the pair of first side edges (11); A cutting torch assembly (22) is movably mounted on the crossbeam (21); A control box (23) controls the movement of the cutting torch assembly (22); The built-in frame (1) is set on the inner wall of the circular tube (30), so that the area to be opened on the inner wall of the circular tube (30) is located within the enclosed area of ​​the built-in frame (1).

2. The high-precision hole-opening device for a large-diameter circular pipe according to claim 1, characterized in that, The lower end of the built-in frame (1) is provided with an adjustable top support assembly.

3. The high-precision hole-opening device for a large-diameter circular pipe according to claim 2, characterized in that, The top support assembly includes hydraulic telescopic rods (41) located at the four right angles of the built-in frame (1).

4. The high-precision hole-opening device for a large-diameter circular pipe according to claim 1, characterized in that, The lower end of the built-in frame (1) is provided with a guide component that contacts the inner wall of the circular tube (30).

5. The high-precision hole-opening device for a large-diameter circular pipe according to claim 4, characterized in that, The guide assembly includes a universal bearing (42) and a limiting wheel. The limiting wheels are evenly arranged at the lower end of each of the first sides (11), and each of the first sides (11) has at least one limiting wheel at its lower end.

6. The high-precision hole-opening device for a large-diameter circular pipe according to claim 1, characterized in that, The first side (11) of the built-in frame (1) is arranged parallel to the axis of the circular tube (30).

7. The high-precision hole-opening device for a large-diameter circular pipe according to claim 6, characterized in that, A pair of linear guide rails (43) are provided at the upper ends of the first side (11), and the two ends of the crossbeam (21) are respectively provided on the pair of linear guide rails (43) through sliding cooperation of sliders.

8. The high-precision hole-opening device for a large-diameter circular pipe according to claim 1, characterized in that... The control box (23) is located on one end of the crossbeam (21).

9. The high-precision hole-opening device for a large-diameter circular pipe according to claim 1, characterized in that, It also includes a laser positioning device, which is used to project the outline of the hole to be opened onto the inner wall of the circular tube (30).

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