Corrosion-resistant high-strength composite duplex stainless steel pipe

Abstract

The utility model provides a corrosion-resistant high-strength composite duplex stainless steel pipe which comprises an outer pipe and an inner pipe, the inner pipe is fixedly installed in the outer pipe through a plurality of reinforcing structures, the reinforcing structures are fixedly connected with the inner pipe and the outer pipe respectively, and the reinforcing structures are arranged in an annular array shape with the inner pipe as the center. When the outer pipe is subjected to external impact, impact can be resisted and buffered through the arc-shaped pieces, the impact force is prevented from directly acting on the inner pipe, and therefore the safety of the inner pipe is guaranteed; meanwhile, in the buffering process, due to the arrangement of the notches, only local racks corresponding to the impact force deform; in this way, large-area deformation of the arc-shaped pieces caused by impact force can be prevented, so that when impact force is generated at other positions, effective buffering can be continued, and the overall safety and reliability are higher.

Description

Technical Field

[0001] The utility model relates to the field of stainless steel pipes, and in particular to a corrosion-resistant high-strength composite duplex stainless steel pipe. Background Art

[0002] Composite duplex stainless steel pipe is a kind of pipe that combines stainless steel and carbon structural steel, and has the advantages of both. It is made by non-destructive pressure synchronous composite technology, so it has the corrosion resistance and wear resistance of stainless steel, and the good bending strength and impact resistance of carbon steel.

[0003] However, the existing composite duplex stainless steel pipes are prone to deformation and depression of both the inner and outer pipes to varying degrees when subjected to external impact force. If used as a conveying medium, it will affect the circulation of the medium.

[0004] Therefore, it is very necessary to invent a corrosion-resistant high-strength composite duplex stainless steel pipe. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a corrosion-resistant high-strength composite duplex stainless steel pipe adopts the following technical solution: a corrosion-resistant high-strength composite duplex stainless steel pipe, comprising an outer pipe and an inner pipe, wherein: the inner pipe is fixedly installed in the outer pipe through a plurality of reinforcing structures, and the reinforcing structures are respectively fixedly connected to the inner pipe and the outer pipe, and the plurality of reinforcing structures are arranged in a circular array with the inner pipe as the center; the outer pipe and the inner pipe are coaxial;

[0006] Preferably, the reinforcing structure includes an arc-shaped piece and a T-shaped clamp, and the protrusion of the arc-shaped piece is fixedly connected to the vertical plate of the T-shaped clamp, and the length of the arc-shaped piece is the same as the length of the T-shaped clamp; both sides of the arc-shaped piece are in contact with and fixedly connected to the inner wall of the outer tube, and the concave cavity of the arc-shaped piece faces the inner wall of the outer tube, and a cavity 2 is formed between the concave cavity of the arc-shaped piece and the inner wall of the outer tube; the T-shaped clamp is fixedly connected to the outer surface of the inner tube.

[0007] Preferably, a cavity is formed between the inner tube and the outer tube; the arc-shaped sheet and the T-shaped clamping plate are both located in the cavity formed between the inner tube and the outer tube.

[0008] Preferably, a plurality of T-shaped slots are evenly distributed on the outer surface of the inner tube, and the length of the T-shaped slots is the same as the length of the inner tube; the cross plate of the T-shaped clamp is in the T-shaped slots, and the cross plate of the T-shaped clamp is fixedly connected to the T-shaped slots.

[0009] Preferably, a plurality of slots are evenly distributed and penetrated on both sides of the arc-shaped piece, and a plurality of racks are formed between the slots and the arc-shaped piece.

[0010] Preferably, the inner and outer surfaces of the outer tube and the inner tube are both provided with corresponding anti-corrosion layers.

[0011] Compared with the prior art, the advantages of the utility model are:

[0012] The overall arrangement of the utility model can resist and buffer the impact through the arc-shaped piece when the outer tube is subjected to external impact, thereby preventing the impact force from directly acting on the inner tube, thereby ensuring the safety of the inner tube; at the same time, during the buffering process, due to the arrangement of the notches, only the local rack corresponding to the impact force will be deformed; in this way, the impact force can be prevented from causing large-area deformation of the arc-shaped piece, so that when the impact force occurs at other positions, it can continue to be effectively buffered, thereby making the whole safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the explosion structure of the utility model.

[0014] Figure 2 It is a schematic diagram of the overall structure of the utility model.

[0015] In the figure:

[0016] Outer tube 1, inner tube 2, arc-shaped sheet 3, T-shaped clamping plate 4, notch 5, rack 6, T-shaped clamping groove 7, cavity 8. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be described clearly and completely below. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0018] In the description of the embodiments, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0019] The utility model is further described below in conjunction with the accompanying drawings:

[0020] Embodiment 1

[0021] Reference Figure 1-2 A corrosion-resistant high-strength composite duplex stainless steel pipe comprises an outer pipe 1 and an inner pipe 2, wherein: the inner pipe 2 is fixedly installed in the outer pipe 1 through a plurality of reinforcing structures, and the reinforcing structures are respectively fixedly connected to the inner pipe 2 and the outer pipe 1, and the plurality of reinforcing structures are arranged in a ring array with the inner pipe 2 as the center;

[0022] The reinforcing structure includes an arc piece 3 and a T-shaped clamping plate 4, and the protrusion of the arc piece 3 is fixedly connected to the vertical plate of the T-shaped clamping plate 4. Through the setting of the arc piece 3, when the outer tube 1 is subjected to impact force, it can have good deformation ability, so as to resist and buffer the impact force and prevent the impact force from directly acting on the inner tube 2. The length of the arc piece 3 is the same as the length of the T-shaped clamping plate 4; the two sides of the arc piece 3 are in contact with and fixedly connected to the inner wall of the outer tube 1, and the concave cavity of the arc piece 3 faces the inner wall of the outer tube 1, and a cavity 2 is formed between the concave cavity of the arc piece 3 and the inner wall of the outer tube 1; the T-shaped clamping plate 4 is fixedly connected to the outer surface of the inner tube 2. Through the setting of the T-shaped clamping plate 4, the arc piece 3 can be supported, so that a certain deformation space is generated between the arc piece 3 and the inner tube 2.

[0023] A cavity 8 is formed between the inner tube 2 and the outer tube 1 to provide a corresponding deformation space for the arc-shaped piece 3 ; the arc-shaped piece 3 and the T-shaped clamping plate 4 are both located in the cavity 8 formed between the inner tube 2 and the outer tube 1 .

[0024] A plurality of T-slots 7 are evenly distributed on the outer surface of the inner tube 2, and the length of the T-slots 7 is the same as that of the inner tube 2; the cross plate of the T-slot plate 4 is in the T-slot 7, and the cross plate of the T-slot plate 4 is fixedly connected to the T-slot 7; through the arrangement of the T-slot 7 and the T-slot plate 4, it is convenient to quickly position the reinforcing structure during the installation process, ensure the stability between the reinforcing structure and the inner tube 2, so that the reinforcing structure and the inner tube 2 can be welded and fixed; at the same time, the strength between the inner tube 2 and the reinforcing structure can be improved.

[0025] A plurality of slots 5 are evenly distributed through both sides of the arc-shaped sheet 3, and a plurality of racks 6 are formed between the slots 5 and the arc-shaped sheet 3. Through the arrangement of the slots 5, when the arc-shaped sheet 3 is locally subjected to pressure, only the racks 6 corresponding to the pressure position will be deformed, thereby preventing the other positions of the arc-shaped sheet 3 from being affected.

[0026] The inner and outer surfaces of the outer tube 1 and the inner tube 2 are both provided with corresponding anti-corrosion layers so as to have better anti-corrosion ability.

[0027] Utilizing the technical solution described in the utility model, or those skilled in the art designing similar technical solutions inspired by the technical solution of the utility model to achieve the above-mentioned technical effects, all fall within the protection scope of the utility model.

Claims

1. A corrosion-resistant high-strength composite duplex stainless steel pipe, characterized in that: It comprises an outer tube (1) and an inner tube (2), wherein: the inner tube (2) is fixedly installed in the outer tube (1) via a plurality of reinforcing structures, and the reinforcing structures are respectively fixedly connected to the inner tube (2) and the outer tube (1); The reinforcing structure comprises an arc-shaped piece (3) and a T-shaped clamping plate (4), and the protrusion of the arc-shaped piece (3) is fixedly connected to the vertical plate of the T-shaped clamping plate (4); the two sides of the arc-shaped piece (3) are in contact with and fixedly connected to the inner wall of the outer tube (1), and the concave cavity of the arc-shaped piece (3) faces the inner wall of the outer tube (1), and a cavity 2 is formed between the concave cavity of the arc-shaped piece (3) and the inner wall of the outer tube (1); and the T-shaped clamping plate (4) is fixedly connected to the outer surface of the inner tube (2).

2. The corrosion-resistant high-strength composite duplex stainless steel pipe according to claim 1, characterized in that: A cavity (8) is formed between the inner tube (2) and the outer tube (1); the arc-shaped sheet (3) and the T-shaped clamping plate (4) are both located in the cavity (8) formed between the inner tube (2) and the outer tube (1).

3. The corrosion-resistant high-strength composite duplex stainless steel pipe according to claim 2, characterized in that: The outer surface of the inner tube (2) is evenly provided with a plurality of T-shaped slots (7); the transverse plate of the T-shaped clip plate (4) is located in the T-shaped slots (7), and the transverse plate of the T-shaped clip plate (4) is fixedly connected to the T-shaped slots (7).

4. The corrosion-resistant high-strength composite duplex stainless steel pipe according to claim 1, characterized in that: A plurality of slots (5) are evenly distributed and penetrated on both sides of the arc-shaped piece (3), and a plurality of racks (6) are formed between the slots (5) and the arc-shaped piece (3).

5. The corrosion-resistant high-strength composite duplex stainless steel pipe according to claim 1, characterized in that: The inner and outer surfaces of the outer tube (1) and the inner tube (2) are both provided with corresponding anti-corrosion layers.

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