A cold-drawn precision welded steel pipe with a positioning structure

Abstract

This utility model relates to the field of steel pipe technology, specifically a cold-drawn precision welded steel pipe with a positioning structure, including a steel pipe body, a first connector, and a second connector. The first connector and the second connector are respectively provided at the front and rear ends of the steel pipe body. In this cold-drawn precision welded steel pipe with a positioning structure, the hinge groove of the first connecting plate is hinged to the L-shaped hinge frame. When docking, the hinge frame can be directly rotated to fit against the second connecting plate of the other steel pipe. Initial positioning is achieved by adapting the hinge arm to the notch, without the need for additional auxiliary equipment to calibrate the axis, greatly reducing the difficulty of operation. The length and angle design of the hinge frame are precisely matched to the docking requirements of the steel pipes. After rotation, the fasteners can be quickly aligned with the connecting pipe, ensuring that the coaxiality of the two sets of steel pipes is consistent when docking, avoiding deviations caused by manual adjustment, and ensuring the sealing effect and connection stability from the source.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe technology, specifically to a cold-drawn precision welded steel pipe with a positioning structure. Background Technology

[0002] Cold-drawn precision welded steel pipes are widely used in boiler equipment due to their advantages such as high dimensional accuracy, uniform wall thickness, and stable mechanical properties. They are mainly used in core components such as boiler water-steam circulation pipes, superheater pipes, and economizer pipes. During boiler operation, the pipes need to withstand high temperature, high pressure, and frequent thermal shocks. Multiple sets of steel pipes need to be precisely connected and sealed through a connection structure. The positioning accuracy, sealing performance, and structural strength of the connection directly determine the boiler's operational safety, thermal efficiency, and service life.

[0003] Traditional steel pipes require auxiliary equipment to be set up and workers to adjust them before the ends can be connected, which is inconvenient. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a cold-drawn precision welded steel pipe with a positioning structure.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a cold-drawn precision welded steel pipe with a positioning structure, comprising a steel pipe body, a first connector, and a second connector. The first connector and the second connector are respectively provided at the front and rear ends of the steel pipe body. The first connector includes a first connecting plate, a hinge frame, and a fastener. The first connecting plate is provided on the outer side of the front end of the steel pipe body. A hinge groove is also provided at the end of the first connecting plate away from the steel pipe body. The hinge frame is L-shaped. One end of the hinge frame is hinged to the hinge groove. A fastener connected to the second connector is provided at the other end of the hinge frame. The second connector includes a second connecting plate and a connecting pipe. A second connecting pipe is provided on the outer side of the rear end of the steel pipe. A connecting pipe connected to the fastener is provided at the end of the second connecting pipe near the steel pipe body.

[0008] Preferably, the second connecting plate is further provided with a notch that matches the hinge arm of the hinge frame.

[0009] Preferably, the fastener includes a stud and a handle, one end of the stud is connected to the handle, and the stud passes through the hinge frame and is connected to the connecting tube.

[0010] Preferably, the handle is provided with friction texture.

[0011] Preferably, the steel pipe body is further provided with a first reinforcing rib that is connected to the first connecting disc.

[0012] Preferably, the steel pipe body is further provided with a second reinforcing rib that is connected to the second connecting disc.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, this utility model provides a cold-drawn precision welded steel pipe with a positioning structure, which has the following beneficial effects:

[0015] The cold-drawn precision welded steel pipe with positioning structure has a hinge slot on the first connecting plate that is hinged to the L-shaped hinge frame. When docking, the hinge frame can be rotated directly to fit the second connecting plate of the other steel pipe. Initial positioning is achieved by adapting the hinge arm to the notch. No additional auxiliary equipment is needed to calibrate the axis, which greatly reduces the difficulty of operation.

[0016] The length and angle of the hinge frame are precisely designed to match the steel pipe docking requirements. After rotation, the fasteners can be quickly aligned with the connecting pipe, ensuring that the coaxiality of the two sets of steel pipes is consistent when docking, avoiding deviations caused by manual adjustment, and ensuring sealing effect and connection stability from the source. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the assembly of the two sets of equipment in this utility model.

[0018] Figure 2 The structure of this utility model Figure 1 Enlarged view of a portion of the image;

[0019] Figure 3 This is a first front view schematic diagram of the structure of this utility model;

[0020] Figure 4 This is a second main view schematic diagram of the structure of this utility model.

[0021] In the figure: 1. Steel pipe body; 2. First connecting plate; 3. Hinged frame; 4. Second connecting plate; 5. Connecting pipe; 6. Stud; 7. Handle; 8. Friction pattern; 9. First reinforcing rib; 10. Second reinforcing rib. Detailed Implementation

[0022] 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.

[0023] Please see Figures 1-4 A cold-drawn precision welded steel pipe with a positioning structure includes a steel pipe body 1, a first connector and a second connector. The first connector and the second connector are respectively provided at the front and rear ends of the steel pipe body 1. The first connector includes a first connecting plate 2, a hinge frame 3 and a fastener. The first connecting plate 2 is provided on the outer side of the front end of the steel pipe body 1. The end of the first connecting plate 2 away from the steel pipe body 1 is also provided with a hinge groove. The hinge frame 3 is L-shaped. One end of the hinge frame 3 is hinged to the hinge groove. The other end of the hinge frame 3 is provided with a fastener connected to the second connector. The second connector includes a second connecting plate 4 and a connecting pipe 5. The second connecting pipe 5 is provided on the outer side of the rear end of the steel pipe. The end of the second connecting pipe 5 near the steel pipe body 1 is provided with a connecting pipe 5 connected to the fastener.

[0024] The first connecting plate 2 and the second connecting plate 4 are fixed at the front and rear ends of the steel pipe body 1, respectively. The first reinforcing rib 9 and the second reinforcing rib 10 connect the steel pipe body 1 to the corresponding connecting plate, thereby enhancing the rigidity of the connection part, resisting the high temperature, high pressure and thermal shock of the boiler, and preventing the connecting plate from deforming.

[0025] The hinge slot of the first connecting plate 2 is hinged to one end of the L-shaped hinge frame 3, allowing the hinge frame 3 to rotate flexibly around the hinge point; the notch on the second connecting plate 4 is adapted to the size of the hinge arm of the hinge frame 3, providing mechanical limit for the initial positioning during docking.

[0026] The stud 6 of the fastener passes through the other end of the hinge frame 3 and is fixedly connected to the handle 7. The friction texture 8 of the handle 7 increases the grip friction and facilitates manual operation. The connecting tube 5 on the second connecting plate 4 has a pre-set threaded hole that matches the stud 6, providing a connection basis for fastening and locking.

[0027] When two sets of steel pipes need to be connected, the second connecting plate 4 of the first set of steel pipes is brought close to the first connecting plate 2 of the second set of steel pipes so that the axes of the two sets of steel pipes are roughly aligned (no precise calibration is required).

[0028] Rotate the L-shaped hinge frame 3 on the first connecting plate 2 so that the hinge arm of the hinge frame 3 is embedded in the notch of the second connecting plate 4 of the other steel pipe. Through the limiting effect of the notch, the initial positioning of the two sets of steel pipes is achieved, and the axial deviation is quickly corrected.

[0029] The length and angle of the hinge frame 3 are precisely designed. After initial positioning, the stud 6 is exactly aligned with the threaded hole of the connecting tube 5 on the second connecting plate 4. Alignment before tightening can be completed without additional adjustment, completely eliminating the dependence on auxiliary calibration equipment.

[0030] The operator holds the handle 7 with the friction texture 8 and rotates the stud 6 clockwise. After the stud 6 passes through the hinge frame 3, it engages with the threaded hole of the connecting pipe 5. As the stud 6 is tightened, the hinge frame 3 drives the two sets of connecting discs to gradually fit together and press tightly.

[0031] After the connecting discs are fitted together, they form a sealing surface. With the fastening force of the stud 6, a rigid connection between the two sets of steel pipes is achieved, which not only ensures the coaxiality after docking, but also improves the sealing performance and prevents medium leakage during boiler operation.

[0032] If disassembly and maintenance are required, simply rotate handle 7 counterclockwise, loosen stud 6, and rotate hinge bracket 3 to disengage from the notch to separate the two sets of steel pipes. The operation is convenient and does not damage the connection structure.

[0033] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0034] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0035] 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.

Claims

1. A cold-drawn precision welded steel pipe with a positioning structure, comprising a steel pipe body (1), a first connector, and a second connector, characterized in that, The front and rear ends of the steel pipe body (1) are respectively provided with the first connector and the second connector. The first connector includes a first connecting plate (2), a hinge frame (3) and a fastener. The first connecting plate (2) is provided on the outer side of the front end of the steel pipe body (1). The first connecting plate (2) is also provided with a hinge groove at the end of the first connecting plate (2) away from the steel pipe body (1). The hinge frame (3) is L-shaped. One end of the hinge frame (3) is hinged to the hinge groove. The other end of the hinge frame (3) is provided with a fastener connected to the second connector. The second connector includes a second connecting plate (4) and a connecting pipe (5). The second connecting pipe (5) is provided on the outer side of the rear end of the steel pipe. The second connecting pipe (5) is provided with a connecting pipe (5) connected to the fastener at the end of the second connecting pipe (5) close to the steel pipe body (1).

2. The cold-drawn precision welded steel pipe with a positioning structure according to claim 1, characterized in that, The second connecting plate (4) is also provided with a notch that matches the hinge arm of the hinge frame (3).

3. A cold-drawn precision welded steel pipe with a positioning structure according to claim 2, characterized in that, The fastener includes a stud (6) and a handle (7). One end of the stud (6) is connected to the handle (7). The stud (6) passes through the hinge frame (3) and is connected to the connecting tube (5).

4. A cold-drawn precision welded steel pipe with a positioning structure according to claim 3, characterized in that, The handle (7) is provided with friction texture (8).

5. A cold-drawn precision welded steel pipe with a positioning structure according to claim 4, characterized in that, The steel pipe body (1) is also provided with a first reinforcing rib (9) that is connected to the first connecting plate (2).

6. A cold-drawn precision welded steel pipe with a positioning structure according to claim 5, characterized in that, The steel pipe body (1) is also provided with a second reinforcing rib (10) that is connected to the second connecting plate (4).

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