Rapid rotation joint type steel pipe thread structure

Abstract

This invention provides a rapid rotation-type steel pipe threaded structure that allows for locking by rotating the steel pipes only a small angle during joining, significantly improving construction efficiency and maintaining structural strength. [Solution] The quick-rotation joint type steel pipe thread structure mainly comprises a pipe body 1 and at least one threaded portion 2 provided at one end of the pipe body, which is either a male end 21 or a female end 20. When the outer diameter A of the pipe body includes at least 2.5 inches, 3.0 inches, 3.5 inches, 4.0 inches, or 5.0 inches, the thread length L is between 50 and 100 mm. The threads of the threaded portion each have multiple thread starting points, and when connecting the male and female ends of the threaded portions of two pipe bodies, multiple threads can engage simultaneously with an angle of less than one rotation. Furthermore, the thread tooth profile includes a widened tip and a deepened root, thereby improving pull-out resistance and slip prevention performance.

Description

Technical Field

[0001] The present invention relates to the technical field of steel pipe thread structures, and particularly to a quick-rotating joint type steel pipe thread structure.

Background Art

[0002] Steel pipe joining technology is widely applied to support work for tunnel excavation, connection of underground works, erection of temporary steel structures, slope stabilization work, and various piping works that require long-distance extension. For the connection method of steel pipes, screw connection is widely used, and particularly standard pipe threads or machine threads with equal pitch are the most common. This conventional thread has advantages such as easy processing and unified specifications. However, in actual construction sites, various drawbacks often become apparent due to restrictions on the construction environment.

[0003] First, the conventional thread is short in length, and the axial feed amount per rotation is usually limited. When it is necessary to connect steel pipes, the constructor has to rotate the thread repeatedly several times to completely lock the male tooth end and the female tooth end. In tunnels or underground works, the working space is narrow and the light is insufficient, and the steel pipes are long and heavy. Therefore, it is difficult for the constructor to perform a large-angle rotation operation, and the joining process often requires time and labor. Furthermore, the steel pipes are likely to be adhered with mud, dust or oil stains during the transportation or lifting process, which makes the meshing of the threads not smooth, increases the rotational resistance, and may also cause problems such as tooth meshing deviation, tooth jamming, or inability to achieve complete locking.

[0004] And, the conventional screw connection requires multiple rotations, which not only prolongs the construction time but also increases the physical burden on the constructor. In long-term and high-frequency steel pipe connection work, the constructor has to apply force to the steel pipe and perform repeated rotation operations, which easily causes fatigue and damage to parts such as the wrists, shoulders, and waists, affecting the construction efficiency and safety. If the constructor cannot lock the thread securely due to fatigue, looseness may occur at the joint of the steel pipe, reducing the stability of the entire structure and potentially causing risks to the construction quality.

[0005] Furthermore, conventional screw tooth profile designs are largely based on standard specifications and are not optimized for the rapid joining needs of construction sites. Tooth profile angle, tip width, and root depth are all designed with versatility in mind, and the balance between "rapid screwing" and "high pull-out resistance" is not taken into consideration. If the screw pitch is too small, the screwing speed decreases, and if the screw pitch is increased, the strength of the tooth profile becomes insufficient, making problems such as tooth slippage and tip breakage more likely. Therefore, conventional screw structures have a technical bottleneck between the requirements of rapid joining and high strength.

[0006] Furthermore, while some conventional technologies include quick-connection mechanisms such as snap-type, pin-type, or wedge-type joints, these structures often require additional parts, are complex to manufacture, are costly, and have low compatibility with existing steel pipe systems. In construction projects that use large quantities of steel pipes, replacing the entire connection system significantly increases construction costs and management difficulties. Therefore, there is still a shortage of steel pipe threaded structures on the market that can achieve "quick connection" while maintaining the strength of the threaded joint.

[0007] In short, conventional steel pipe screw jointing methods have several problems, including a high number of rotations, low construction efficiency, susceptibility to environmental influences, easy screw wear, and a heavy burden on workers. Therefore, they cannot meet the needs of modern construction for rapid, safe, and highly efficient construction. For this reason, there is an urgent need for an improved screw structure that allows the steel pipe to complete locking with fewer rotation angles or rotations while simultaneously maintaining sufficient pull-out resistance and slip prevention performance. This would improve construction efficiency, reduce labor burden, and ensure construction quality. This invention is a technical solution proposed to solve the above problems. [Overview of the project] [Means for solving the problem]

[0008] In view of this, the main object of the present invention is to provide a rapid rotation joint type steel pipe screw structure, and the rapid rotation joint type steel pipe screw structure is The main body of the pipe and It mainly includes at least one threaded portion which is a male or female end, provided at one end of the pipe body, If the outer diameter of the pipe body is A and includes at least 2.5 inches, 3.0 inches, 3.5 inches, 4.0 inches, or 5.0 inches, then the length L of the thread is between 50 and 100 mm, but is not limited to this in practice. Each of the threads in the aforementioned threaded section has multiple thread starting points, and when connecting the male and female ends of the threaded sections of the two pipe bodies, multiple threads can engage simultaneously by rotating them by an angle of less than one full turn, and, The tooth profile of the screw has a widened tip and a deep root, and the widened tip and deep root are not only able to complete the lock with only a small angle of rotation, but also maintain sufficient pull-out resistance and slip prevention.

[0009] In a preferred embodiment, the multiple thread starting points of the threaded portion are three, and these three starting points are arranged at approximately 120° intervals in the circumferential direction, limiting the rotation angle when joining the male and female threaded ends of the two pipe bodies to within approximately 120°. As a result, locking is completed by rotating the steel pipes only by a small angle during joining, significantly improving construction efficiency and maintaining structural strength. [Effects of the Invention]

[0010] Compared to conventional known technologies, the advantage of the rapid rotation joint type steel pipe screw structure of this invention is that it solves the problems of conventional steel pipe screws, such as reduced joining efficiency due to the need for multiple rotations, susceptibility to environmental influences, and susceptibility to tooth misalignment and jamming. The core technology of this invention is as follows: Through the synergistic effect of three geometric features—multiple screw starting points, a large screw pitch proportional design, and a tooth profile reinforcement structure—the steel pipe can be locked with an extremely small rotation angle, while simultaneously maintaining sufficient pull-out resistance and slip prevention performance, thereby achieving both a significant improvement in construction efficiency and ensuring structural strength. [Brief explanation of the drawing]

[0011] [Figure 1] This is a plan view of the rapid rotational joint type steel pipe of the present invention. [Figure 2] This is an enlarged cross-sectional view of the screw portion of this invention when it has a male tooth end. [Figure 3] This is an enlarged cross-sectional view of the threaded portion of the present invention when it has a female tooth end. [Figure 4] This is a schematic diagram illustrating the application of the present invention when multiple threads in the threaded portion are connected at three starting points. [Modes for carrying out the invention]

[0012] In order to easily understand the contents and effects that can be achieved of this invention, specific embodiments will be given with reference to the drawings and described in detail below. As shown in Figures 1 to 4, the rapid rotation joint type steel pipe screw structure according to this invention is Pipe body 1, The pipe body 1 is provided at one end and mainly includes at least one threaded portion 2 which is a male toothed end 21 or a female toothed end 20, If the outer diameter A of the pipe body 1 includes at least 2.5 inches, 3.0 inches, 3.5 inches, 4.0 inches, or 5.0 inches, the length L of the thread is between 50 and 100 mm, but is not limited to this in practice. Each of the threads in the aforementioned threaded portion 2 has multiple thread starting points, and when connecting the male end 21 and female end 20 of the threaded portion 2 of the two pipe bodies 1, multiple threads can engage simultaneously by rotating by an angle of less than one full turn, and, The tooth profile of the screw has a widened tip portion C and a deep root portion R, and the widened tip portion C and deep root portion R are not only able to complete the locking by rotating only a small angle, but also maintain sufficient pull-out resistance and slip prevention.

[0013] In a preferred embodiment, as shown in Figures 2 and 3, the thread pitch P of the threaded portion 2 is 6x3-12x3 (18-36) mm, but in practice, it is not limited to this.

[0014] In a preferred embodiment, as shown in FIG. 4, the multiple thread starting points of the screw part 2 are three starting points, and the three starting points are arranged at intervals of about 120° in the circumferential direction, and the rotation angle when joining the male tooth end 21 and the female tooth end 20 of the screw part 2 of the two pipe bodies 1 is limited within about 120°.

[0015] In a preferred embodiment, the effective mounting length of the pipe body 1 is often about 12 meters, and a longer mounting depth may be required depending on the geological conditions. The pipe body 1 is mainly a hollow pipe with a straight tubular shape and open ends at both ends, but in reality, it is not limited to this.

[0016] In a preferred embodiment, the screw part 2 is provided at at least one end of the pipe body 1. In an embodiment of the present invention, the number of the screw parts 2 may be two, and the two screw parts 2 are respectively provided at both ends of the pipe body 1. The two screw parts 2 may all be in the female screw form, or all in the male screw form, or in the form of internal and external threads (shown in FIG. 1) respectively according to the construction needs. In this way, the steel pipe of this embodiment not only has the advantage of being easy to process and form, but also has the effect of being simple in extension by connection.

[0017] With the above configuration, the present invention can complete the locking by rotating at a slight angle (for example, 120°) during the joining of steel pipes, greatly improving the construction efficiency and reducing the risks of tooth meshing deviation, tooth jamming and screw wear.

[0018] Compared with the conventional well-known technology, the advantages of the quick-rotation joining type steel pipe screw structure of the present invention have the following remarkable technical effects.

[0019] JPEG0003256200000002.jpg51150

[0020] 1. Substantial reduction of the joining rotation angle: By adopting the design of multiple starting points and a large pitch, the locking can be completed by only rotating about 1 / 3 turn during the joining of steel pipes, greatly improving the construction efficiency compared with the conventional structure that requires multiple rotations.

[0021] 2. More than 2 to 3 times improvement in construction efficiency: In narrow environments such as tunnels and underground works, construction workers do not need to repeatedly rotate the steel pipes, can quickly complete the connection, shorten the construction period, and reduce labor costs.

[0022] 3. Improvement in pull-out resistance and anti-slip performance: By strengthening the tooth shape (widened tooth tip C, deepened tooth bottom R), the contact area of the screw increases, the strength improves, and the problem of insufficient tooth shape strength associated with a large screw pitch is avoided.

[0023] 4. Reduction of the risks of tooth meshing misalignment, tooth jamming, and screw wear: Excellent introduction is achieved by multiple starting points, facilitating alignment during construction and reducing screw damage.

[0024] 5. Applicability to high-load construction: The screw of the present invention has sufficient strength and can meet the high-load needs such as tunnel support steel pipes, arch frames, and underground work connections.

[0025] 6. Compatibility of the processing method with existing devices: It can be processed using existing screw processing machines, does not require device replacement, and mass production can be achieved.

[0026] As described above, since the present invention has novelty and practicality and meets the requirements for utility model registration applications, it is filing a utility model registration application. However, the above description is only a preferred embodiment of the present invention and does not limit the scope of implementation of the present invention. Therefore, all equivalent changes and modifications made based on the claims and descriptions in the specification of the present invention shall be included in the claims of the present invention.

Explanation of Reference Numerals

[0027] Pipe body... 1 Screw part... 2 Male tooth end... 21 Female tooth end... 20 Length of screw... L Tooth pitch... P Widened tooth tip... C Deepened tooth root...R

Claims

1. A rapid rotation joint type steel pipe thread structure, The main body of the pipe and It mainly includes at least one threaded portion which is a male or female end, provided at one end of the pipe body, If the outer diameter A of the pipe body includes at least 2.5 inches, 3.0 inches, 3.5 inches, 4.0 inches, or 5.0 inches, the length L of the thread is between 50 and 100 mm. Each of the threads in the aforementioned threaded section has multiple thread starting points, and when connecting the male and female ends of the threaded sections of the two pipe bodies, multiple threads can engage simultaneously by rotating them by an angle of less than one full turn, and The screw profile has a widened tip and a deep root, and the widened tip and deep root are present in the rapid rotation joint type steel pipe screw structure, which not only allows locking to be completed with only a small angle of rotation, but also maintains sufficient pull-out resistance and slip prevention.

2. The rapid rotational joint type steel pipe screw structure according to claim 1, wherein the multiple thread starting points of the threaded portion are three starting points, and the three starting points are arranged at intervals of approximately 120° in the circumferential direction, thereby limiting the rotation angle when joining the male and female threaded ends of the two pipe bodies to within approximately 120°.

3. The rapid rotation joint type steel pipe screw structure according to claim 1, wherein the screw pitch P of the screw portion is 18-36 mm.

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