High-strength small-bore seamless stainless steel pipe

Abstract

The application relates to a high-strength small-caliber seamless stainless steel pipe, which comprises a main pipe body and an extension pipe body connected to the main pipe body through a connecting structure, the connecting structure comprises a lock rod connected to the extension pipe body and a deformable limiting rod movably connected to the side wall of the main pipe body; the lock rod is arranged in the main pipe body and is deformable, a deformable lock protrusion is fixed on the lock rod, a deformable limiting protrusion is fixed on the limiting rod, when the lock rod is positioned, the lock rod abuts against the limiting rod close to the side wall in the main pipe body, and the lock protrusion and the limiting protrusion are dislocated and clamped. The lock rod is inserted into the main pipe body for preliminary positioning, through the deformation of the lock rod and the limiting rod, when the lock rod abuts against the limiting rod away from the side wall in the main pipe body, the lock rod and the limiting rod relatively deform, the lock rod is moved to abut against the limiting rod close to the side wall in the main pipe body, and then the deformable lock protrusion and the limiting protrusion are dislocated and clamped, so that the lock rod cannot be easily taken out, and the positioning purpose is achieved.

Description

Technical Field

[0001] This application relates to the technical field of seamless stainless steel pipes, and in particular to a high-strength, small-diameter seamless stainless steel pipe. Background Technology

[0002] Seamless stainless steel pipes are pipes made of stainless steel material. They have high strength and are hollow inside, so they can be used as conveying pipelines or as supporting pipes. They are resistant to air and do not easily rust. Small-diameter seamless stainless steel pipes are often used for fluid transportation in relatively narrow spaces.

[0003] Regarding the aforementioned technologies, the applicant believes that current small-diameter seamless stainless steel pipes are inconvenient to operate when it is necessary to extend the pipes due to their small diameter. The problem of how to more conveniently connect small-diameter seamless stainless steel pipes urgently needs to be solved. Utility Model Content

[0004] To improve the convenience of extension operations between small-diameter seamless stainless steel pipes, this application provides a high-strength small-diameter seamless stainless steel pipe.

[0005] This application provides a high-strength, small-diameter seamless stainless steel pipe using the following technical solution:

[0006] A high-strength, small-diameter seamless stainless steel pipe includes a main pipe body and an extension pipe body connected to the main pipe body via a connecting structure. The connecting structure includes a locking rod connected to the extension pipe body and a deformable limiting rod movably connected to the side wall of the main pipe body. The locking rod passes through the main pipe body and is deformable, and a deformable locking protrusion is fixed on the locking rod. A deformable limiting protrusion is fixed on the limiting rod. When the locking rod is positioned, the locking rod abuts against the side wall of the limiting rod near the main pipe body, and the locking protrusion and the limiting protrusion are misaligned and engaged.

[0007] By adopting the above technical solution, the locking rod is initially positioned by inserting it into the main body. Through the deformation of the locking rod and the limiting rod, when the locking rod abuts against the side wall of the limiting rod away from the main body, the two deform relative to each other, causing the locking rod to move to abut against the side wall of the limiting rod close to the main body. Furthermore, the deformable locking protrusion and the limiting protrusion are misaligned and locked together, so that the locking rod cannot be easily dislodged, thus achieving the positioning purpose.

[0008] Preferably, the connecting structure further includes a positioning rod fixed to the end wall of the extension tube, and a positioning slot for inserting the positioning rod is provided on the main tube; a locking rod is movably connected inside the positioning rod, and the connecting structure further includes an installation ring, and a push block is fixed on the inner side wall of the installation ring, which is inserted into the positioning rod and pushes the locking rod; the installation ring is set outside the positioning rod and between the main tube and the extension tube.

[0009] By adopting the above technical solution, the positioning rod supports the locking rod and provides space for the sliding of the locking rod. The locking rod is moved towards the main body by inserting the push block on the mounting ring and pushing it. At the same time, the mounting ring is located between the main body and the extension tube and covers the positioning rod, which also protects the positioning rod.

[0010] Preferably, the positioning rod has a through hole for the push block to be inserted, the push block extends downward from the side wall near the locking rod to form an inclined surface, and the end of the locking rod forms a beveled surface that matches the inclined surface.

[0011] By adopting the above technical solution, the pusher is inserted from the through hole, and the inclined surface abuts against the inclined surface to drive the locking rod to move towards the main body and achieves engagement with the limiting rod, thus achieving the positioning function.

[0012] Preferably, the positioning rods are spaced apart on the extension tube; the mounting ring is formed by oppositely arranged and connected semi-rings; the ends of the opposite semi-rings extend towards each other to form mutually close mounting plates and are fixed by mounting bolts.

[0013] By adopting the above technical solution, the semi-circular ring is easier to fit onto the positioning rod, and the two sides of the final installation ring are fixed by installation bolts, thus improving structural stability.

[0014] Preferably, the limiting rod is connected to a limiting bolt threaded to the main body, and a rotatable rotating plate is fixed to one end of the limiting bolt located inside the limiting rod.

[0015] By adopting the above technical solution, it is easy to control the raising and lowering of the limit rod from the outside, and it is easy to remove the extension tube later.

[0016] Preferably, the end of the locking rod is fixed with a deformable vertical rod that passes through the positioning rod, and the locking protrusion is fixed to the side wall of the vertical rod; a sliding groove for the vertical rod to move is provided on the side wall of the positioning rod.

[0017] By adopting the above technical solution, the vertical rod supports the locking protrusion and is easier to engage with the limiting rod; the sliding groove provides the vertical rod with movement space.

[0018] Preferably, the end of the extension tube is narrowed to form a narrowed end that is inserted into the main tube, and a sealing ring is fixed on the side wall of the narrowed end.

[0019] By adopting the above technical solution, a sealing ring is set to improve the sealing performance after connection.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] The locking rod is initially positioned by inserting it into the main pipe. Through the deformation of the locking rod and the limiting rod, when the locking rod abuts against the side wall of the limiting rod away from the main pipe, the two deform relative to each other, causing the locking rod to move to abut against the side wall of the limiting rod close to the main pipe. Furthermore, the deformable locking protrusion and the limiting protrusion are misaligned and locked, making it impossible for the locking rod to easily come out, thus achieving the positioning purpose. Meanwhile, the limiting bolt on the limiting rod allows the limiting protrusion and the locking protrusion to be separated, facilitating the external control of the raising and lowering of the limiting rod and facilitating the subsequent removal of the extension pipe.

[0022] The positioning rod supports the locking rod and provides space for the sliding of the locking rod. The locking rod is moved towards the main body by inserting and pushing the push block on the mounting ring, thus completing the locking and positioning. At the same time, the mounting ring is located between the main body and the extension tube and covers the positioning rod, which also protects the positioning rod.

[0023] The semi-circular shape is easier to fit onto the positioning rod, and the final installation ring is fixed on both sides by installation bolts, improving structural stability. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the connection between the main tube and the extension tube in an embodiment of this application;

[0025] Figure 2 This is a partial cross-sectional view of an embodiment of the present application showing the positioning rod being inserted into the positioning slot, the locking rod, and the limiting rod in cooperation.

[0026] Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle;

[0027] Figure 4 This is a partial cross-sectional view of the interconnected semi-circular mounting plates of an embodiment of this application.

[0028] Explanation of reference numerals in the attached drawings: 1. Main tube body; 11. Positioning slot; 2. Extension tube body; 21. Reduced diameter end; 3. Connecting structure; 31. Positioning rod; 311. Through hole; 32. Locking rod; 321. Locking protrusion; 33. Limiting rod; 331. Limiting protrusion; 34. Mounting ring; 341. Push block; 342. Semi-ring; 4. Vertical rod; 5. Limiting bolt; 51. Rotating plate; 6. Mounting plate; 7. Mounting bolt. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings.

[0030] This application discloses a high-strength, small-diameter seamless stainless steel pipe, as shown in the embodiments below. Figure 1 , 2It includes a main body 1 and an extension tube 2 connected to the main body 1 by a connecting structure 3. The end of the extension tube 2 is narrowed to form a narrowed end 21 that is inserted into the main body 1, and a sealing ring is fixed on the side wall of the narrowed end 21; the sealing ring is provided to improve the sealing performance after connection.

[0031] Reference Figure 1 , 2 The connecting structure 3 includes a positioning rod 31 and a locking rod 32. The positioning rod 31 is fixed at intervals on the end wall of the extension tube 2 near the main tube 1, and the locking rod 32 is movably connected inside the positioning rod 31.

[0032] Reference Figure 2 , 3 The end of the locking rod 32 is fixed with a deformable vertical rod 4 that passes through the positioning rod 31. A sliding groove is provided on the side wall of the positioning rod 31 for the vertical rod 4 to move. The sliding groove provides space for the vertical rod 4 to move. When the locking rod 32 moves inside the positioning rod 31, the vertical rod 4 moves along the sliding groove. A positioning slot 11 is provided on the main body 1 for the positioning rod 31 to be inserted.

[0033] Reference Figure 2 , 3 The vertical rod 4 is fixed with a deformable locking protrusion 321. The connecting structure 3 also includes a deformable limiting rod 33 movably connected to the side wall of the main tube 1. The limiting rod 33 is connected with a limiting bolt 5 threaded to the outside of the main tube 1. The end of the limiting bolt 5 located inside the limiting rod 33 is fixed with a rotatable rotating plate 51. This facilitates the external control of the lifting and lowering of the limiting rod 33, enabling the removal of the extension tube 2 later.

[0034] Reference Figure 2 , 3 The limiting rod 33 is fixed with a deformable limiting protrusion 331. When the locking rod 32 enters the positioning slot 11, the vertical rod 4 abuts against the side wall of the limiting rod 33 away from the main body 1. The two abut against each other and deform, causing the vertical rod 4 to move to abut against the side wall of the limiting rod 33 close to the main body 1, until the locking protrusion 321 and the limiting protrusion 331 are misaligned and engaged, so as to achieve the purpose of positioning the locking rod 32 and the positioning rod 31.

[0035] Reference Figure 2 , 4 The connecting structure 3 also includes a mounting ring 34. A push block 341 is fixed on the inner side wall of the mounting ring 34, which is inserted into the positioning rod 31 and pushes the locking rod 32 to move relative to the positioning rod 31. The mounting ring 34 is formed by the relative arrangement and connection of half rings 342.

[0036] Reference Figure 2The positioning rod 31 has a through hole 311 for inserting the push block 341. The push block 341 extends downward from the side wall near the locking rod 32 to form an inclined surface. The end of the locking rod 32 forms a beveled surface that matches the inclined surface. The push block 341 is inserted into the through hole 311. The inclined surface abuts against the beveled surface and drives the locking rod 32 to move inward into the main body 1 and achieves locking, thus achieving the positioning function.

[0037] Reference Figure 1 , 2 The corresponding semi-rings 342 are respectively fitted outside the positioning rod 31 located on the upper half of the extension tube body 2 and outside the positioning rod 31 located on the lower half of the extension tube body 2; the push block 341 is respectively fixed on the inner side wall of the semi-rings 342 and corresponds to the positioning rod 31; and the corresponding semi-rings 342 are located between the main tube body 1 and the extension tube body 2.

[0038] Reference Figure 1 , 4 The opposite ends of the semi-circular rings 342 extend towards each other to form mounting plates 6 that are tightly attached to each other and are fixed by mounting bolts 7.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-strength, small-diameter seamless stainless steel pipe, characterized in that: It includes a main body (1) and an extension tube (2) connected to the main body (1) via a connecting structure (3). The connecting structure (3) includes a locking rod (32) connected to the extension tube (2) and a deformable limiting rod (33) movably connected to the side wall of the main body (1). The locking rod (32) is inserted into the main body (1) and is deformable. A deformable locking protrusion (321) is fixed on the locking rod (32). A deformable limiting protrusion (331) is fixed on the limiting rod (33). When the locking rod (32) is positioned, the locking rod (32) abuts against the side wall of the limiting rod (33) near the inside of the main body (1), and the locking protrusion (321) and the limiting protrusion (331) are misaligned and engaged.

2. The high-strength, small-diameter seamless stainless steel pipe according to claim 1, characterized in that: The connecting structure (3) further includes a positioning rod (31) fixed on the end wall of the extension tube (2), and a positioning slot (11) for the positioning rod (31) to be inserted into is provided on the main tube (1); the locking rod (32) is movably connected inside the positioning rod (31), and the connecting structure (3) further includes an installation ring (34), and a push block (341) is fixed on the inner side wall of the installation ring (34) to be inserted into the positioning rod (31) and push the locking rod (32); the installation ring (34) is set outside the positioning rod (31) and between the main tube (1) and the extension tube (2).

3. A high-strength, small-diameter seamless stainless steel pipe according to claim 2, characterized in that: The positioning rod (31) has a through hole (311) for inserting the push block (341). The push block (341) extends downward from the side wall of the locking rod (32) away from the locking rod (32) to form an inclined surface. The end of the locking rod (32) forms a beveled surface that matches the inclined surface.

4. A high-strength, small-diameter seamless stainless steel pipe according to claim 2, characterized in that: The positioning rods (31) are spaced apart on the extension tube (2); the mounting ring (34) is formed by the opposite arrangement and connection of the semi-rings (342); the ends of the opposite semi-rings (342) extend towards each other to form a mounting plate (6) that is tightly attached to each other and is fixed by mounting bolts (7).

5. A high-strength, small-diameter seamless stainless steel pipe according to claim 1, characterized in that: The limiting rod (33) is connected to a limiting bolt (5) threaded to the outside of the main body (1), and a rotatable rotating plate (51) is fixed at one end of the limiting bolt (5) inside the limiting rod (33).

6. A high-strength, small-diameter seamless stainless steel pipe according to claim 1, characterized in that: The end of the locking rod (32) is fixed with a deformable vertical rod (4) that passes through the positioning rod (31), and the locking protrusion (321) is fixed on the side wall of the vertical rod (4); a sliding groove for the vertical rod (4) to move is opened on the side wall of the positioning rod (31).

7. A high-strength, small-diameter seamless stainless steel pipe according to claim 1, characterized in that: The end of the extension tube (2) is narrowed to form a narrowed end (21) that is inserted into the main tube (1), and a sealing ring is fixed on the side wall of the narrowed end (21).

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