Large-caliber low-nickel stainless steel seamless steel pipe

Abstract

The utility model discloses a large-caliber low-nickel stainless steel seamless steel pipe which comprises a seamless steel pipe body, one end of the seamless steel pipe body is fixedly connected with an arc-shaped block, one side of the top end of the arc-shaped block is fixedly connected with a fixing plate, and one side of the fixing plate is fixedly connected with symmetrically-arranged arc-shaped limiting plates. The side, close to the arc-shaped limiting plate, of the fixing plate is fixedly connected with symmetrically-arranged reset springs, the ends, away from the fixing plate, of the reset springs are fixedly connected with an arc-shaped baffle, and the middle position of the top end of the arc-shaped baffle is fixedly connected with a control button. During welding, lime and water only need to be added into the reaction tank formed in the arc-shaped block, and after the lime and the water generate chemical reaction to release heat, a welding area can be uniformly heated, so that the magnetism of the welding area is reduced, and the situation that an operator is difficult to weld due to electromagnetic arc blowing caused by higher magnetism is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of seamless steel pipes, in particular to a large-diameter low-nickel stainless steel seamless steel pipe. Background Art

[0002] There are many types of stainless steel, which can be divided into austenite and martensite or ferrite according to the structure at room temperature. Austenite is non-magnetic or weakly magnetic, while martensite or ferrite is magnetic.

[0003] Some existing seamless stainless steel pipes reduce the nickel element while increasing the proportion of ferrite. This leads to an increase in the magnetism of some low-nickel seamless stainless steel pipes. During tungsten inert gas welding, electromagnetic arc blow is easily generated, making it difficult for operators to weld. Therefore, the welding area needs to be demagnetized. Common demagnetization methods include heating the metal magnet, knocking and impacting it, and weakening the magnetic force through an AC magnetic field. Utility Model Content

[0004] The utility model aims to provide a large-diameter low-nickel stainless steel seamless pipe to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a large-diameter low-nickel stainless steel seamless steel pipe, comprising a seamless steel pipe, one end of the seamless steel pipe is fixedly connected to an arc block, one side of the top of the arc block is fixedly connected to a fixed plate, one side of the fixed plate is fixedly connected to a symmetrically arranged arc limit plate, the fixed plate is fixedly connected to a symmetrically arranged return spring on the side close to the arc limit plate, the return spring is fixedly connected to an arc baffle at one end away from the fixed plate, a control button is fixedly connected to the middle position of the top of the arc baffle, a reaction groove is provided inside the arc block, and a feed port is provided at the top of the reaction groove.

[0006] Preferably, the feed port is arranged corresponding to the arc-shaped baffle plate, and the arc-shaped baffle plate is slidably connected to the arc-shaped limiting plate.

[0007] Preferably, a drain pipe is fixedly connected to the bottom end of the arc block, and a pipe cover is movably installed at the bottom end of the drain pipe.

[0008] Preferably, a groove is formed at one end of the seamless steel pipe, and a blunt edge is formed on one side of the groove.

[0009] Preferably, the surface of the control button is designed with an anti-slip structure.

[0010] Compared with the prior art, the beneficial effect of the utility model is that through the structural design of the arc block, it is only necessary to add lime and water into the reaction tank opened inside the arc block. After the lime and water produce a chemical reaction and release heat, the welding area can be evenly heated to reduce the magnetism of the welding area, thereby avoiding electromagnetic arc blow due to high magnetism, which makes it difficult for operators to weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is the structural front view of the utility model;

[0012] Figure 2 It is a schematic diagram of the structural state of the utility model;

[0013] Figure 3 This is a partial disassembly diagram of the structure of the utility model.

[0014] In the figure: 1. seamless steel pipe; 2. arc block; 3. fixed plate; 4. arc limit plate; 5. reset spring; 6. arc baffle; 7. control button; 8. reaction tank; 9. feed port; 10. drain pipe; 11. pipe cover. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1-3 The utility model provides a technical solution: a large-diameter low-nickel stainless steel seamless steel pipe, comprising a seamless steel pipe 1, one end of the seamless steel pipe 1 is fixedly connected with an arc block 2, one side of the top of the arc block 2 is fixedly connected with a fixing plate 3, one side of the fixing plate 3 is fixedly connected with a symmetrically arranged arc limiting plate 4, the side of the fixing plate 3 close to the arc limiting plate 4 is fixedly connected with a symmetrically arranged return spring 5, the end of the return spring 5 away from the fixing plate 3 is fixedly connected with an arc baffle 6, the top of the arc baffle 6 is fixedly connected with a control button 7 at the middle position, a reaction groove 8 is opened inside the arc block 2, and a feed port 9 is opened at the top of the reaction groove 8.

[0017] The feed port 9 is arranged corresponding to the arc baffle 6, and the arc baffle 6 is slidably connected to the arc limit plate 4 to facilitate the movement of the arc baffle 6. The bottom end of the arc block 2 is fixedly connected to a drain pipe 10, and a pipe cover 11 is movably installed at the bottom end of the drain pipe 10 to facilitate the discharge of sewage. A groove is provided at one end of the seamless steel pipe 1, and a blunt edge is provided on one side of the groove to facilitate the welding of the seamless pipe 1. The surface of the control button 7 is designed with an anti-slip structure to facilitate the control and adjustment of the arc baffle 6.

[0018] Specifically, when using the utility model, pinch the control button 7, and drive the arc baffle 6 to move in the direction of the fixed plate 3 through the control button 7. During the movement, the arc limit plate 4 limits the arc baffle 6. When the arc baffle 6 moves to one side of the fixed plate 3, lime and water are added into the reaction tank 8 opened by the arc block 2 through the feed port 9, and the control button 7 is released. At this time, the reset spring 5 drives the arc baffle 6 to reset. The reset arc baffle 6 blocks the feed port 9 to avoid heat loss. When a large amount of heat is generated by the reaction of lime and water, the heat is conducted to the seamless steel pipe 1. The magnetism of the steel pipe with rising temperature is greatly reduced, which is convenient for welding the groove part of the seamless steel pipe 1. After welding, the pipe cover 11 at the bottom end of the arc block 2 can be opened to discharge the reaction waste in the reaction tank 8 through the drain pipe 10.

[0019] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A large-diameter low-nickel stainless steel seamless pipe, characterized in that: The invention comprises a seamless steel pipe (1), wherein one end of the seamless steel pipe (1) is fixedly connected to an arc block (2), one side of the top of the arc block (2) is fixedly connected to a fixed plate (3), one side of the fixed plate (3) is fixedly connected to a symmetrically arranged arc limit plate (4), the side of the fixed plate (3) close to the arc limit plate (4) is fixedly connected to a symmetrically arranged return spring (5), the end of the return spring (5) away from the fixed plate (3) is fixedly connected to an arc baffle (6), the top of the arc baffle (6) is fixedly connected to a control button (7), a reaction groove (8) is provided inside the arc block (2), and a feed port (9) is provided at the top of the reaction groove (8).

2. A large-diameter low-nickel stainless steel seamless pipe according to claim 1, characterized in that: The feed port (9) is arranged corresponding to the arc-shaped baffle plate (6), and the arc-shaped baffle plate (6) is slidably connected to the arc-shaped limiting plate (4).

3. A large-diameter low-nickel stainless steel seamless pipe according to claim 1, characterized in that: The bottom end of the arc block (2) is fixedly connected to a drainage pipe (10), and the bottom end of the drainage pipe (10) is movably mounted with a pipe cover (11).

4. A large-diameter low-nickel stainless steel seamless pipe according to claim 1, characterized in that: One end of the seamless steel pipe (1) is provided with a groove, and one side of the groove is provided with a blunt edge.

5. The large-diameter low-nickel stainless steel seamless pipe according to claim 1, characterized in that: The surface of the control button (7) is designed as an anti-slip structure.

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