High-strength corrosion-resistant composite stainless steel pipe

Abstract

The utility model provides a high-strength corrosion-resistant composite stainless steel pipe which comprises an inner pipe and an outer pipe, connecting rings are evenly distributed and fixedly installed on the outer surface of the inner pipe, and the inner pipe and the connecting rings are arranged in the outer pipe in a sleeved mode and fixedly connected with the outer pipe. By means of the overall arrangement, the coating or the protective layer outside the inner pipe can be prevented from being scratched no matter whether the inner pipe and the outer pipe are compositely assembled in the early stage or in the later stage, so that the inner pipe is safer, and meanwhile, due to the arrangement of the outer pipe, in the later stage using process, the coating or the protective layer can be prevented from being scratched if being impacted by an external object. And impact force can be absorbed and buffered, the inner pipe is prevented from being damaged, and therefore the service life of the inner pipe is guaranteed.

Description

Technical Field

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

[0002] Stainless steel composite pipe is a new material made of stainless steel and carbon structural steel through non-destructive pressure synchronous composite. It combines the corrosion resistance, wear resistance and excellent appearance of stainless steel with the good bending strength and impact resistance of carbon steel.

[0003] Due to its superior performance, it is widely used in municipal public works construction, steel structure and space frame construction, petroleum and petrochemical, municipal facilities, road and bridge guardrails, highway traffic engineering construction; building decoration engineering construction; sports venue facilities engineering construction; traffic grilles, railway isolation nets, building decoration, street lights, bus stop signs, steel structure space frames, furniture, vehicle and ship manufacturing, urban pipeline networks, oil and gas transmission, motorcycle bumpers, clothes racks, bicycle handlebars, etc.

[0004] However, existing composite stainless steel pipes are still prone to scratches on the coating or protective layer on the outer surface during installation and later use. Over time, corrosion can easily penetrate from the scratches, thus affecting the overall service life.

[0005] Therefore, it is essential to invent a high-strength, corrosion-resistant composite stainless steel pipe. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a high-strength corrosion-resistant composite stainless steel pipe, including an inner pipe and an outer pipe. Connecting rings are evenly distributed and fixedly installed on the outer surface of the inner pipe, and the inner pipe and connecting rings are sleeved in the outer pipe and fixedly connected to the outer pipe. The inner pipe and connecting rings are coaxial with the outer pipe. The inner diameter of the outer pipe is larger than the diameter of the connecting ring, and the diameter of the connecting ring is larger than the diameter of the inner pipe.

[0007] Preferably, the outer surface of the inner tube is provided with annular grooves evenly distributed and coaxial with the annular grooves; the connecting ring is fixedly installed in the corresponding annular groove.

[0008] Preferably, the connecting ring includes a first semicircular ring, a second semicircular ring, and a bolt, and the first semicircular ring and the second semicircular ring are fixedly connected by the bolt, forming a circular shape; the first semicircular ring and the second semicircular ring are fixedly installed in the corresponding annular groove by the bolt, and the first semicircular ring and the second semicircular ring are in contact with the inside of the outer tube and fixedly connected.

[0009] Preferably, the surfaces of the first and second semicircular rings are evenly distributed with a plurality of circular holes, and the two ends of the opening of the first semicircular ring are evenly distributed with two countersunk holes, and the two ends of the opening of the second semicircular ring are evenly distributed with two threaded holes; the countersunk holes and the threaded holes are positioned correspondingly; the bolts are fixedly installed in the corresponding countersunk holes and threaded holes.

[0010] Preferably, the outer surface of the outer tube is provided with a plurality of grooves evenly distributed, and the outer tube wall is provided with a plurality of buffer cavities evenly distributed through it; the grooves and buffer cavities are arranged in a ring array with the outer tube as the center.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The overall design of this utility model prevents scratches on the coating or protective layer of the inner tube, whether during the initial assembly of the inner and outer tubes or during subsequent construction and installation. This makes the inner tube safer and more reliable. At the same time, the outer tube absorbs and buffers the impact force when it is hit by external objects during later use, preventing damage to the inner tube and thus ensuring its service life, as well as improving its strength and corrosion resistance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall exploded structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the exploded structure of the connecting ring of this utility model.

[0015] Figure 3 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 4 This is a schematic diagram of the overall half-section structure of this utility model.

[0017] In the picture:

[0018] Inner tube 1, connecting ring 2, semi-circular ring one 21, semi-circular ring two 22, round hole 23, countersunk hole 24, threaded hole 25, bolt 26, outer tube 3, annular groove 4, groove 5, buffer cavity 6. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] Example:

[0022] As attached Figure 1 To be continued Figure 4 As shown:

[0023] This utility model provides a high-strength corrosion-resistant composite stainless steel pipe, including an inner pipe 1 and an outer pipe 3. Connecting rings 2 are evenly distributed and fixedly installed on the outer surface of the inner pipe 1. The connecting rings 2 prevent contact between the inner pipe 1 and the outer pipe 3 during the assembly process, thereby preventing scratches on the coating or protective layer on the inner pipe 1 and the outer pipe 3. The inner pipe 1 and the connecting rings 2 are sleeved in the outer pipe 3. The outer pipe 3 protects the inner pipe 1, improves the overall strength and corrosion resistance, and is fixedly connected to the outer pipe 3. The inner pipe 1 and the connecting rings 2 are coaxial with the outer pipe 3. The inner diameter of the outer pipe 3 is larger than the diameter of the connecting rings 2, and the diameter of the connecting rings 2 is larger than the diameter of the inner pipe 1. The arrangement of the inner pipe 1, the connecting rings 2, and the outer pipe 3 forms an annular buffer cavity between the inner pipe 1 and the outer pipe 3.

[0024] The outer surface of the inner tube 1 is evenly provided with annular grooves 4 and is coaxial with the annular grooves 4; the connecting ring 2 is fixedly installed in the corresponding annular groove 4. The setting of the annular grooves 4 facilitates the positioning and connection between the connecting ring 2 and the inner tube 1.

[0025] The connecting ring 2 includes a first semicircular ring 21, a second semicircular ring 22, and a bolt 26. The first semicircular ring 21 and the second semicircular ring 22 are fixedly connected by the bolt 26, forming a circular shape. The first semicircular ring 21 and the second semicircular ring 22 are fixedly installed in the corresponding annular groove 4 by the bolt 26, and the first semicircular ring 21 and the second semicircular ring 22 are in contact with the inside of the outer tube 3. The arrangement of the first semicircular ring 21, the second semicircular ring 22, and the bolt 26 facilitates the installation of the connecting ring 2 in the corresponding annular groove 4, thus effectively preventing scratches to the coating or protective layer in the annular groove 4 during installation.

[0026] The surfaces of semicircular ring 1 21 and semicircular ring 22 are evenly distributed with several circular holes 23. The circular holes 23 allow the annular buffer cavity formed between the inner tube 1 and the outer tube 3 to be interconnected. This allows the corresponding insulation medium, such as hot air or hot water, to be supplied to the annular buffer cavity when the medium transported in the inner tube 1 needs to be insulated. The openings of semicircular ring 1 21 and semicircular ring 22 are evenly distributed with two countersunk holes 24 at each end, and the openings of semicircular ring 22 and semicircular ring 22 are evenly distributed with two threaded holes 25 at each end. The countersunk holes 24 and threaded holes 25 are positioned correspondingly. Bolts 26 are fixedly installed in the corresponding countersunk holes 24 and threaded holes 25. The countersunk holes 24, threaded holes 25 and bolts 26 allow semicircular ring 1 21 and semicircular ring 22 to be securely installed in the corresponding annular grooves 4.

[0027] The outer surface of the outer tube 3 is evenly provided with several grooves 5. The grooves 5 can reduce the contact area when the outer tube 3 collides with an external object. During the collision, the part of the outer tube 3 with the buffer cavity 6 can always be in contact with the external object. In this way, the buffer cavity 6 can absorb energy during the collision, thereby ensuring the safety of the inner tube 1. The outer tube 3 is evenly provided with several buffer cavities 6. The grooves 5 and the buffer cavities 6 are arranged in a ring array with the outer tube 3 as the center, and the grooves 5 and the buffer cavities 6 are arranged alternately.

[0028] It should be noted that all structures involved in this case use existing stainless steel materials, so we will not go into further detail here.

[0029] In this embodiment, during assembly, the corresponding connecting ring 2 is first fixedly installed in the annular groove 4 corresponding to the inner tube 1, and then the inner tube 1 with the connecting ring 2 is passed through the outer tube 3 for composite assembly. Finally, the connecting ring 2 near the two ends of the inner tube 1 and the outer tube 3 is welded and fixed to the outer tube 3, thus completing the composite assembly of the inner tube 1 and the outer tube 3.

[0030] In this way, during later use, when subjected to impact from external objects, the outer tube 3 can effectively buffer the impact force, prevent external objects from directly contacting the inner tube 1, and effectively ensure the safety of the coating and protective layer on the surface of the inner tube 1, thereby giving the inner tube 1 higher strength and corrosion resistance.

[0031] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A high-strength, corrosion-resistant composite stainless steel pipe, characterized in that: It includes an inner tube (1) and an outer tube (3). Connecting rings (2) are evenly and fixedly installed on the outer surface of the inner tube (1). The inner tube (1) and the connecting rings (2) are sleeved in the outer tube (3) and fixedly connected to the outer tube (3). The outer surface of the inner tube (1) is provided with annular grooves (4) evenly distributed; the connecting ring (2) is fixedly installed in the corresponding annular grooves (4); The connecting ring (2) includes a semi-circular ring one (21), a semi-circular ring two (22) and a bolt (26), and the semi-circular ring one (21) and the semi-circular ring two (22) are fixedly connected by the bolt (26); the semi-circular ring one (21) and the semi-circular ring two (22) are fixedly installed in the corresponding annular groove (4) by the bolt (26), and the semi-circular ring one (21) and the semi-circular ring two (22) are in contact with the inside of the outer tube (3) and are fixedly connected.

2. The high-strength corrosion-resistant composite stainless steel pipe as described in claim 1, characterized in that: The surfaces of the first semicircular ring (21) and the second semicircular ring (22) are evenly provided with a number of circular holes (23), and two countersunk holes (24) are evenly provided at both ends of the opening of the first semicircular ring (21), and two threaded holes (25) are evenly provided at both ends of the opening of the second semicircular ring (22); the countersunk holes (24) and the threaded holes (25) are positioned corresponding to each other; the bolts (26) are fixedly installed in the corresponding countersunk holes (24) and threaded holes (25).

3. The high-strength corrosion-resistant composite stainless steel pipe as described in claim 1, characterized in that: The outer surface of the outer tube (3) is provided with a number of grooves (5), and the outer tube (3) is provided with a number of buffer cavities (6) that are evenly distributed through the tube wall.

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