A high-strength stainless steel seamless pipe for petrochemical industry

Abstract

The utility model relates to the technical field of seamless steel pipes, and discloses a high-strength stainless steel seamless steel pipe for petrochemical industry, including a steel pipe main body, a first base is fixedly connected to the left side of the bottom end of the steel pipe main body, and a rotating plate is rotatably connected to the front and rear ends of the first base, and a second base is fixedly connected to the right side of the bottom end of the steel pipe main body, and a card slot is provided on both the front and rear sides of the right end of the second base, and a connecting block is fixedly connected to the front and rear ends of the second base. In the utility model, the insert block is inserted into the card slot to achieve horizontal position calibration between the steel pipe main bodies on both sides, and the rotating plate is rotated so that the arc groove is placed on the top of the connecting block to form a limit between the steel pipe main bodies on both sides, and the ports of the steel pipe main bodies on both sides are kept in close contact, so as to improve the sealing effect between the ports after welding. Through the ceramic material used in the anti-static layer, the petrochemical liquid will not generate static electricity when passing through, reducing safety hazards.

Description

Technical Field

[0001] The utility model relates to the technical field of seamless steel pipes, in particular to a high-strength stainless steel seamless steel pipe for petrochemical industry. Background Art

[0002] Seamless steel pipe is a steel pipe made by hot rolling or cold drawing process. It has excellent mechanical properties and pressure resistance. They are usually used in industrial occasions that require high strength, corrosion resistance and high temperature resistance, especially in petrochemical, fertilizer, electric power, shipbuilding and other fields.

[0003] At present, some existing seamless steel pipes are mostly manually operated when connecting their ports. However, there will be certain errors during manual operation, which may cause a certain offset between the horizontal ends of the seamless steel pipes, and the degree of tightness between the ports may not be tight enough, which will affect the sealing effect of the ports after welding. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art, and to propose a high-strength stainless steel seamless pipe for petrochemical industry, in which an arc groove is placed on the top of the connecting block to form a limit between the steel pipe bodies on both sides and keep the ports of the steel pipe bodies on both sides closely fitted, so as to improve the sealing effect between the ports after welding.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A high-strength stainless steel seamless pipe for petrochemical industry comprises a steel pipe body, wherein a first base is fixedly connected to the left side of the bottom end of the steel pipe body, and a rotating plate is rotatably connected to both the front and rear ends of the first base, and a second base is fixedly connected to the right side of the bottom end of the steel pipe body, and slots are provided on both the front and rear sides of the right end of the second base, and connecting blocks are fixedly connected to both the front and rear ends of the second base.

[0007] Furthermore, both front and rear sides of the left end of the first base are fixedly connected with plug blocks, and the left ends of the plug blocks are matched with the shape of the inner wall of the slot.

[0008] Furthermore, an arc-shaped groove is provided on the lower side of the right end of the rotating plate, and the shape of the inner wall of the arc-shaped groove matches the shape of the upper side of the outer wall of the connecting block.

[0009] Furthermore, a pressure-resistant layer is fixedly connected to the inner layer of the steel pipe body.

[0010] Furthermore, the inner layer of the pressure-resistant layer is fixedly connected with a heat-resistant layer.

[0011] Furthermore, the inner layer of the heat-resistant layer is fixedly connected with an antistatic layer.

[0012] The utility model has the following beneficial effects:

[0013] 1. In the utility model, the second base of the steel pipe body on one side is aligned with the first base of the steel pipe body on the other side, and then the insert block is inserted into the slot to achieve the horizontal position calibration between the steel pipe bodies on both sides, and the rotating plate is rotated to put the arc groove on the top of the connecting block to form a limit between the steel pipe bodies on both sides, and keep the ports of the steel pipe bodies on both sides closely fitted, so as to improve the sealing effect between the ports after welding.

[0014] 2. In the utility model, the ceramic material used in the antistatic layer is chemically inert and is not easy to react with petrochemical substances when in contact with them, thus having good corrosion resistance. In addition, ceramics are non-conductive, and petrochemical liquids will not generate static electricity when passing through, thereby reducing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of a high-strength stainless steel seamless steel pipe for petrochemical industry proposed by the utility model;

[0016] Figure 2 This is a schematic diagram of the first base structure of a high-strength stainless steel seamless steel pipe for petrochemical industry proposed by the utility model;

[0017] Figure 3 The utility model is a cross-sectional view of the main body of a high-strength stainless steel seamless pipe for petrochemical industry.

[0018] Legend:

[0019] 1. Steel pipe body; 2. First base; 3. Second base; 4. Connecting block; 5. Card slot; 6. Turn plate; 7. Insert block; 8. Arc groove; 9. Pressure-resistant layer; 10. Heat-resistant layer; 11. Anti-static layer. DETAILED DESCRIPTION

[0020] 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.

[0021] Reference Figure 1-3The utility model provides an embodiment: a high-strength stainless steel seamless steel pipe for petrochemical industry, including a steel pipe body 1, a first base 2 is fixedly connected to the left side of the bottom end of the steel pipe body 1, the steel pipe body 1 itself is made of 316 stainless steel, which has high strength and corrosion resistance. When two steel pipe bodies 1 need to be butt-jointed and installed, the second base 3 of the steel pipe body 1 on one side is aligned with the first base 2 of the steel pipe body 1 on the other side, and the front and rear ends of the first base 2 are rotatably connected with a rotating plate 6, the right side of the bottom end of the steel pipe body 1 is fixedly connected with a second base 3, the front and rear sides of the right end of the second base 3 are provided with a card slot 5, and the front and rear ends of the second base 3 are fixedly connected with a connecting block 4.

[0022] Specifically, plug blocks 7 are fixedly connected to the front and rear sides of the left end of the first base 2, and the left ends of the plug blocks 7 are matched with the shape of the inner walls of the slots 5. The plug blocks 7 are inserted into the slots 5 to align the ports, thereby realizing the horizontal position calibration between the steel pipe bodies 1 on both sides. An arc groove 8 is provided on the lower side of the right end of the rotating plate 6, and the shape of the inner walls of the arc groove 8 is matched with the shape of the upper side of the outer wall of the connecting block 4. The rotating plate 6 is rotated so that the arc groove 8 is placed on the top of the connecting block 4, forming a limit between the steel pipe bodies 1 on both sides and maintaining a close fit between the ports of the steel pipe bodies 1 on both sides. Then, welding tools are used to weld the ports between the steel pipe bodies 1 to improve the sealing effect between the ports.

[0023] Specifically, the inner layer of the steel pipe body 1 is fixedly connected with a pressure-resistant layer 9. The aluminum alloy material used in the pressure-resistant layer 9 has sufficient strength to withstand high pressure and ensure safe and reliable operation. The inner layer of the pressure-resistant layer 9 is fixedly connected with a heat-resistant layer 10. The chromium alloy material used in the heat-resistant layer 10 has good high temperature resistance and oxidation resistance, which improves the stable operation of the steel pipe body 1 at high temperatures and will not affect the performance of the steel pipe body 1 due to temperature changes. The inner layer of the heat-resistant layer 10 is fixedly connected with an anti-static layer 11. The ceramic material used in the anti-static layer 11 is chemically inert and is not easy to react with petrochemical substances when in contact with them, thereby having good corrosion resistance. In addition, ceramics are non-conductive, and petrochemical liquids will not generate static electricity when passing through, thereby reducing safety hazards.

[0024] Working principle: First, when two steel pipe bodies 1 need to be butt-jointed, align the second base 3 of the steel pipe body 1 on one side with the first base 2 of the steel pipe body 1 on the other side, and then insert the plug 7 into the slot 5 to align the ports, so as to achieve horizontal position calibration between the steel pipe bodies 1 on both sides, and then rotate the rotating plate 6 so that the arc groove 8 is placed on the top of the connecting block 4 to form a limit between the steel pipe bodies 1 on both sides, and keep the ports of the steel pipe bodies 1 on both sides tightly fitted, and then use welding tools to weld the ports between the steel pipe bodies 1 to improve the sealing effect between the ports. The ceramic material used in the antistatic layer 11 is chemically inert and is not easy to react with petrochemical substances when in contact with them, thus having good corrosion resistance. In addition, ceramics are non-conductive, and petrochemical liquids will not generate static electricity when passing through, reducing safety hazards. The chromium alloy material used in the heat-resistant layer 10 has good high temperature resistance and oxidation resistance, which improves the stable operation of the steel pipe body 1 at high temperatures and will not affect the performance of the steel pipe body 1 due to temperature changes. The aluminum alloy material used in the pressure-resistant layer 9 has sufficient strength to withstand high pressure, ensuring safe and reliable operation.

[0025] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-strength stainless steel seamless pipe for petrochemical industry, comprising a steel pipe body (1), characterized in that: A first base (2) is fixedly connected to the left side of the bottom end of the steel pipe body (1), and a rotating plate (6) is rotatably connected to both the front and rear ends of the first base (2). A second base (3) is fixedly connected to the right side of the bottom end of the steel pipe body (1), and a clamping groove (5) is provided on both the front and rear sides of the right end of the second base (3), and a connecting block (4) is fixedly connected to both the front and rear ends of the second base (3).

2. The high-strength stainless steel seamless pipe for petrochemical industry according to claim 1, characterized in that: Insertion blocks (7) are fixedly connected to both the front and rear sides of the left end of the first base (2), and the left end of the insertion block (7) matches the shape of the inner wall of the card slot (5).

3. The high-strength stainless steel seamless pipe for petrochemical industry according to claim 1, characterized in that: The lower side of the right end of the rotating plate (6) is provided with an arc-shaped groove (8), and the shape of the inner wall of the arc-shaped groove (8) is consistent with the shape of the upper side of the outer wall of the connecting block (4).

4. The high-strength stainless steel seamless pipe for petrochemical industry according to claim 1, characterized in that: The inner layer of the steel pipe body (1) is fixedly connected with a pressure-resistant layer (9).

5. The high-strength stainless steel seamless pipe for petrochemical industry according to claim 4, characterized in that: The inner layer of the pressure-resistant layer (9) is fixedly connected to a heat-resistant layer (10).

6. The high-strength stainless steel seamless pipe for petrochemical industry according to claim 5, characterized in that: The inner layer of the heat-resistant layer (10) is fixedly connected to an antistatic layer (11).

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