Stainless steel seamless welded pipe

Abstract

The utility model relates to the technical field of stainless steel welded pipes, in particular to a stainless steel seamless welded pipe. According to the technical scheme, the device comprises a stainless steel seamless welded pipe, a first semicircular ring, a double-end stud and a second semicircular ring, connecting rings are welded to the two ends of the stainless steel seamless welded pipe correspondingly, and first inclined faces are arranged on the opposite sides of the outer surfaces of the two connecting rings correspondingly; second inclined planes are arranged at the tops and the bottoms of the inner walls of the first semicircular ring and the second semicircular ring, first nuts are welded to the positions, close to the two ends, of the outer surface of the first semicircular ring, and second nuts are welded to the positions, close to the two ends, of the outer surface of the second semicircular ring; the first nut and the second nut are connected to the positions, close to the two ends, of the outer surface of the double-end stud in a sleeving mode. According to the utility model, the stainless steel seamless welded pipes are convenient to connect, fix, disassemble, maintain and replace, and the stainless steel seamless welded pipes which are connected and fixed are high in sealing property and strength.

Description

Technical Field

[0001] The utility model relates to the technical field of stainless steel welded pipes, in particular to a seamless stainless steel welded pipe. Background Technique

[0002] Stainless steel welded pipes refer to steel pipes made by curling steel or steel strips through a unit and a die and then welding. The production process of stainless steel welded pipes is simple, with high production efficiency and less equipment investment. However, generally, their strength is lower than that of seamless steel pipes. However, with the rapid development of high-quality strip continuous rolling production and the progress of welding and inspection technologies, the weld quality has been continuously improved. After treatment, the weld is the same as the stainless steel surface, and it is difficult to distinguish and find only by the naked eye. Moreover, the variety and specifications of stainless steel welded pipes are increasing day by day, and they have replaced seamless steel pipes in more and more fields, especially in heat exchange equipment pipes, decorative pipes, medium and low-pressure fluid pipes, etc.

[0003] Currently, the seamless stainless steel welded pipes are usually connected by welding, making it difficult to disassemble them during repair and replacement after damage, reducing the convenience of use. For this reason, we propose a seamless stainless steel welded pipe. Content of the Utility Model

[0004] The purpose of the utility model is to provide a seamless stainless steel welded pipe, which has the advantages of being convenient for the connection, fixation, disassembly, repair and replacement of the seamless stainless steel welded pipe, and having strong sealing performance and high strength between the seamless stainless steel welded pipes after connection and fixation, solving the problem that the current seamless stainless steel welded pipes are usually connected by welding, making it difficult to disassemble them during repair and replacement after damage, and reducing the convenience of use.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: A seamless stainless steel welded pipe, including a seamless stainless steel welded pipe, a first semi-circular ring, a stud and a second semi-circular ring. Connection rings are welded at both ends of the seamless stainless steel welded pipe. First inclined surfaces are arranged on one side of the outer surfaces of the two connection rings opposite to each other. Second inclined surfaces are arranged at the top and bottom of the inner walls of the first semi-circular ring and the second semi-circular ring. First nuts are welded at positions near both ends of the outer surface of the first semi-circular ring, and second nuts are welded at positions near both ends of the outer surface of the second semi-circular ring. The first nuts and the second nuts are respectively sleeved on the outer surface of the stud near both ends.

[0006] Preferably, annular sealing grooves are arranged on one side of the outer surfaces of the two connection rings away from each other, and sealing rings are arranged inside the annular sealing grooves.

[0007] Preferably, docking grooves are arranged at positions near both ends of the upper and lower surfaces of the first semi-circular ring, and docking protrusions are arranged at positions near both ends of the upper and lower surfaces of the second semi-circular ring.

[0008] Preferably, a plurality of positioning protrusions and positioning grooves are respectively arranged at equal intervals in a circumferential array on the sides of the outer surfaces of the two connecting rings facing away from each other.

[0009] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0010] 1. By providing a stainless steel seamless welded pipe, a stud, a first semi-circular ring, a second semi-circular ring, a connecting ring, a first inclined surface and a second inclined surface, the present utility model achieves the effects of facilitating the connection, fixing, disassembly, repair and replacement of the stainless steel seamless welded pipe, and having strong sealing performance and high strength between the stainless steel seamless welded pipes after connection and fixation. When two stainless steel seamless welded pipes are fixedly connected, the two connecting rings are both inserted into the ring formed by the first semi-circular ring and the second semi-circular ring, and the first inclined surface and the second inclined surface are in contact. Then, during the process of rotating the stud, the first semi-circular ring and the second semi-circular ring move towards each other, and the two connecting rings are forced to move towards each other, contact and squeeze through the first inclined surface and the second inclined surface, improving the sealing performance and strength between the two connecting rings. When disassembling, repairing and replacing, reverse the rotation of the stud to loosen the first semi-circular ring and the second semi-circular ring.

[0011] 2. By providing a docking groove and a docking protrusion, the present utility model achieves the effect of facilitating the precise docking between the first semi-circular ring and the second semi-circular ring. During the docking process of the two ends of the first semi-circular ring and the two ends of the second semi-circular ring, the docking protrusion is inserted into the docking groove, enabling the precise docking between the first semi-circular ring and the second semi-circular ring.

[0012] 3. By providing a positioning protrusion and a positioning groove, the present utility model achieves the effect of facilitating the precise docking between two stainless steel seamless welded pipes during fixed connection. When the stainless steel seamless welded pipes are fixedly connected, the positioning protrusion is inserted into the positioning groove, enabling the precise docking between the two stainless steel seamless welded pipes, preventing deviation, and at the same time improving the strength of the connection part. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a three-dimensional schematic diagram of the present utility model;

[0014] Figure 2 is the present utility model Figure 1 an enlarged structural schematic diagram of A therein;

[0015] Figure 3 is a main cross-sectional structural schematic diagram of the present utility model;

[0016] Figure 4 is the present utility model Figure 3 an enlarged structural schematic diagram of B therein.

[0017] Reference numerals: 1, stainless steel seamless welded pipe; 2, first semi-circular ring; 3, annular sealing groove; 4, sealing ring; 5, stud; 6, second semi-circular ring; 7, connecting ring; 8, first inclined surface; 9, first nut; 10, docking groove; 11, docking protrusion; 12, second nut; 13, positioning groove; 14, positioning protrusion; 15, second inclined surface. Detailed implementation mode

[0018] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] Embodiment 1

[0020] As Figures 1 - 4 shown, a stainless steel seamless welded pipe proposed by the present invention includes a stainless steel seamless welded pipe 1, a first semi-circular ring 2, a stud 5 and a second semi-circular ring 6. Connecting rings 7 are welded to both ends of the stainless steel seamless welded pipe 1. The cross-sectional views of the first semi-circular ring 2 and the second semi-circular ring 6 are in the shape of "C". First inclined surfaces 8 are provided on one side of the outer surfaces of the two connecting rings 7 facing each other. Second inclined surfaces 15 are provided at the top and bottom of the inner walls of the first semi-circular ring 2 and the second semi-circular ring 6. First nuts 9 are welded to both ends of the outer surface of the first semi-circular ring 2. Second nuts 12 are welded to both ends of the outer surface of the second semi-circular ring 6. The first nuts 9 and the second nuts 12 are respectively sleeved on the outer surface of the stud 5 near both ends. Annular sealing grooves 3 are provided on the other side of the outer surfaces of the two connecting rings 7. A sealing ring 4 is arranged inside the annular sealing groove 3, and the sealing ring 4 is used for sealing between the two connecting rings 7.

[0021] When the two stainless steel seamless welded pipes 1 of the present invention are fixedly connected, the two connecting rings 7 are inserted into the ring formed by the first semi-circular ring 2 and the second semi-circular ring 6, and the first inclined surface 8 and the second inclined surface 15 are in contact. During the process of rotating the stud 5, the first semi-circular ring 2 and the second semi-circular ring 6 move towards each other, and the two connecting rings 7 are forced to move towards each other and contact and squeeze through the first inclined surface 8 and the second inclined surface 15, improving the sealing performance and strength between the two connecting rings 7. When disassembling, repairing and replacing, reverse the stud 5 and loosen the first semi-circular ring 2 and the second semi-circular ring 6.

[0022] Embodiment 2

[0023] As Figure 1 and Figure 2 shown, a stainless steel seamless welded pipe proposed by the present invention, compared with Embodiment 1, this embodiment further includes docking grooves 10 provided at both ends of the upper and lower surfaces of the first semi-circular ring 2, and docking protrusions 11 provided at both ends of the upper and lower surfaces of the second semi-circular ring 6.

[0024] In this embodiment, during the docking process of the two ends of the first semi-circular ring 2 and the two ends of the second semi-circular ring 6, the docking protrusion 11 is inserted into the docking groove 10, which enables the precise docking between the first semi-circular ring 2 and the second semi-circular ring 6 and also improves the strength of the connection part.

[0025] Embodiment 2

[0026] As Figure 3 and Figure 4 shown, a stainless steel seamless welded pipe proposed by the present utility model. Compared with Embodiment 1, this embodiment further includes that on the opposite sides of the outer surfaces of the two connecting rings 7, a plurality of positioning protrusions 14 and positioning grooves 13 are respectively arranged at equal intervals in a circumferential array, and the positioning grooves 13 and the positioning protrusions 14 correspond to each other one by one.

[0027] In this embodiment, when the two stainless steel seamless welded pipes 1 are fixedly connected, the positioning protrusion 14 is inserted into the positioning groove 13, which enables the precise docking of the two stainless steel seamless welded pipes, prevents deviation, and also improves the strength of the connection part.

[0028] The above specific embodiments are only several preferred embodiments of the present utility model. Based on the technical solution of the present utility model and the relevant revelations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A stainless steel seamless welded pipe, comprising a stainless steel seamless welded pipe (1), a first semicircular ring (2), a stud (5) and a second semicircular ring (6), characterized in that: Both ends of the stainless steel seamless welded pipe (1) are welded with connecting rings (7), and the first inclined surface (8) is provided on the opposite side of the outer surface of the two connecting rings (7). The top and bottom of the inner wall of the first semicircular ring (2) and the inner wall of the second semicircular ring (6) are provided with second inclined surfaces (15). The outer surface of the first semicircular ring (2) is welded with a first nut (9) near the two ends, and the outer surface of the second semicircular ring (6) is welded with a second nut (12) near the two ends. The first nut (9) and the second nut (12) are respectively sleeved on the outer surface of the stud (5) near the two ends.

2. A stainless steel seamless welded pipe according to claim 1, characterized in that: An annular sealing groove (3) is provided on the opposite sides of the outer surfaces of the two connecting rings (7), and a sealing ring (4) is provided inside the annular sealing groove (3).

3. The stainless steel seamless welded pipe according to claim 1, characterized in that: The upper surface and the lower surface of the first semicircular ring (2) are both provided with docking grooves (10) near the two ends, and the upper surface and the lower surface of the second semicircular ring (6) are both provided with docking protrusions (11) near the two ends.

4. The stainless steel seamless welded pipe according to claim 1, characterized in that: A plurality of positioning protrusions (14) and positioning grooves (13) are equidistantly arranged in a circular array on the opposite sides of the outer surfaces of the two connecting rings (7).

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