CN219623420U

CN219623420U - Three-layer composite pipe for maritime work

Info

Publication number: CN219623420U
Application number: CN202320174285.5U
Authority: CN
Inventors: 陈建才
Original assignee: Fujian Yunsheng Composite Technology Co ltd
Current assignee: Fujian Yunsheng Composite Technology Co ltd
Priority date: 2023-02-06
Filing date: 2023-02-06
Publication date: 2023-09-01
Anticipated expiration: 2033-02-06

Abstract

The utility model relates to a three-layer composite pipe for maritime work, which belongs to the technical field of building material steel pipes and comprises a composite steel pipe, wherein a concrete layer is composited on the outer wall of the composite steel pipe, and a 3PE layer is composited on the outer wall of the concrete layer; the composite steel pipe is formed by rolling a composite plate, wherein the composite plate is formed by compounding three layers of plates, the three layers of plates are an inner surface layer, a middle interlayer and an outer surface layer from inside to outside in sequence, the composite plate is utilized for rolling and processing, the inner surface layer is made of a titanium steel material according to the possible corrosive property of a conveying fluid, the titanium steel material has more excellent corrosion resistance compared with the traditional stainless steel, so that the corrosion resistance of the composite steel pipe can be pertinently improved, the outer wall of the composite steel pipe is sequentially provided with a concrete layer and a 3PE layer, the rigidity of the pipe is effectively improved, and the risks of bending, cracking, breakage and the like can be avoided under the marine environment.

Description

Three-layer composite pipe for maritime work

Technical Field

The utility model relates to a three-layer composite pipe for maritime work, belonging to the technical field of building material steel pipes.

Background

In recent years, along with the rapid development of national economy in China, more and more large steel pipes are applied to the fields of mines, ports and docks, ocean engineering, military engineering, municipal engineering and the like. In order to effectively ensure the reliability of the steel pipe, prolong the service life of the large-sized steel pipe, ensure the safe operation of the infrastructure and need to improve the structure of the steel pipe. The composite steel pipe is one of the important measures for improving the structure of the steel pipe at present, and is pressed and compacted into a composite multi-layer structure by a plurality of layers of metals with different materials according to a certain distribution rule so as to integrate the excellent characteristics of the materials of each layer,

the marine engineering pipeline is generally arranged in a larger distance, for example, the pipeline is simply connected and arranged by adopting a composite steel pipe, and because of the influence of natural factors such as ocean current surge, fluctuation phenomenon of flood and flood, and the like, the pipeline which is in service in the sea for a long time can be subjected to risks such as bending, bursting and even breaking due to insufficient rigidity.

In addition, in the prior art application of the composite pipe in ocean engineering, in order to solve the corrosion resistance problem of the existing steel pipe, the stainless steel layer is applied to the composite steel pipe structure as a surface layer, but when the steel pipe is actually applied to conveying corrosive fluid or being laid in a seawater environment which is easy to corrode, a phenomenon of faster corrosion still occurs, and the corrosion resistance characteristic of the steel pipe needs to be further improved.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides a three-layer composite pipe for maritime work.

The technical scheme of the utility model is as follows:

the three-layer composite pipe for the marine engineering comprises a composite steel pipe, wherein a concrete layer is composited on the outer wall of the composite steel pipe, and a 3PE layer is composited on the outer wall of the concrete layer; the composite steel pipe is formed by rolling a composite plate, wherein the composite plate is formed by compounding three layers of plates, and the three layers of plates are an inner surface layer, a middle interlayer and an outer surface layer from inside to outside in sequence.

Wherein the middle interlayer is carbon steel.

Wherein the inner surface layer is titanium steel or stainless steel, and the outer surface layer is a stainless steel layer.

Wherein the stainless steel layer is 304 stainless steel, 316 stainless steel or 2205 stainless steel.

The composite plate is formed by welding, heating and rolling, the thickness of a plate blank of the composite plate is not more than 450mm, three welding spots are arranged on each composite boundary line of the inner surface layer and the outer surface layer, the spot welding length is 20-30 mm, the penetration depth of a welding seam is not less than 35mm when the periphery of a composite boundary line of the inner surface layer and the outer surface layer is welded, the rolling force of rough rolling of the composite plate is not less than 5000 tons, the rolling force of finish rolling is not less than 5000 tons, the offline temperature of stacking slow cooling of the composite plate is 400-450 ℃, and the time is longer than 48 hours.

The utility model has the following beneficial effects:

1. the utility model relates to a three-layer composite pipe for maritime work, which comprises an inner surface layer, a middle interlayer and an outer surface layer, wherein the middle interlayer is made of carbon steel, good plasticity and toughness are provided, a composite plate is utilized for rolling and processing, the inner surface layer is made of titanium steel materials according to the possible corrosive property of a conveying fluid, and the titanium steel materials have more excellent corrosion resistance compared with the traditional stainless steel, so that the corrosion resistance of the composite pipe can be pertinently improved.

2. The utility model relates to a three-layer composite pipe for maritime work, which comprises an inner composite steel pipe, wherein the outer wall of the composite steel pipe is sequentially provided with a concrete layer and a 3PE layer, the setting of the concrete layer can effectively improve the rigidity of the pipe, under the influence of natural factors such as ocean current surge, fluctuation phenomenon of the fluctuation tide and the like, the ocean current surge protection device has enough compression resistance, and avoids risks such as bending, cracking, breaking and the like; the 3PE layer is covered outside, so that the composite steel pipe and the concrete layer in the steel pipe are effectively protected from seawater soaking corrosion due to good corrosion resistance, water and air permeability resistance, mechanical properties and the like.

3. The three-layer composite pipe for the marine engineering adopts a structure of a middle low-carbon steel interlayer and two side antirust steel surface layers, the middle layer has strong plasticity, good weldability and lower strength and hardness, the three-layer metal composite pipe is convenient to combine, the three-layer composite pipe has better plasticity and toughness, the composite pipe is rolled and processed by using a composite plate, the low-carbon steel material has lower relative price, the quality of the metal composite pipe can be ensured, the production cost can be saved, and the two side surface layers can be arranged into common stainless steel and high-corrosion-resistance stainless steel according to the environmental corrosion degree, so that the reliability of the pipe is ensured and the service life of a large-sized steel pipe is prolonged while the cost is controlled.

Drawings

FIG. 1 is a schematic structural view of a three-layer composite pipe for marine use according to the present utility model;

fig. 2 is a schematic diagram of a composite steel pipe structure of a three-layer composite pipe for maritime work.

The reference numerals in the drawings are as follows:

1-composite steel pipe, 2-concrete layer, 3-3PE layer, 4-composite plate, 41-inner surface layer, 42-middle interlayer and 43-outer surface layer.

Detailed Description

The utility model will now be described in detail with reference to the drawings and to specific embodiments.

Example 1

Referring to fig. 1-2, the three-layer composite pipe for maritime work comprises a composite steel pipe 1, wherein a concrete layer 2 is compositely arranged on the outer wall of the composite steel pipe 1, a 3PE layer 3 is compositely arranged on the outer wall of the concrete layer 2, and the arrangement of the concrete layer 2 can effectively improve the rigidity of the pipe, so that the pipe has enough compressive capacity under the influence of natural factors such as ocean current surge, fluctuation phenomenon of flood and flood, and the like, and avoids risks such as bending, bursting and even breakage; the outer 3PE layer 3 effectively protects the inner composite steel pipe 1 and the concrete layer 2 from seawater soaking corrosion due to good corrosion resistance, water vapor permeation resistance, mechanical properties and the like.

Example 2

Referring to fig. 2, a three-layer composite pipe for maritime work, wherein the three-layer composite pipe comprises a composite steel pipe 1, the composite steel pipe 1 is manufactured by rolling a composite plate 4, wherein the composite plate 4 is manufactured by compositing three layers of plates, namely an inner surface layer 41, a middle interlayer 42 and an outer surface layer 43 from inside to outside, and the middle interlayer 42 is carbon steel, has strong plasticity, good weldability and lower strength and hardness, is convenient for the combination of the three-layer metal composite pipe, has better plasticity and toughness, is manufactured by rolling a composite plate, has lower relative price of low-carbon steel materials, and can save the production cost while guaranteeing the quality of the metal composite pipe; while the inner surface layer 41 is titanium steel or stainless steel, and the outer surface layer 43 is a stainless steel layer, specifically 304 stainless steel, 316 stainless steel or 2205 stainless steel; in this embodiment, the inner surface layer 41 may be contacted with corrosive fluid during the transportation work and is set as a high corrosion resistance layer, while the outer surface layer 43 is set as a common corrosion resistance layer because the outer wall is compositely provided with the concrete layer 2 and is not in direct contact with seawater, and the method can be applied to pipeline engineering for arranging the marine underwater environment transportation fluid with high corrosion risk.

Example 3

Referring to fig. 1-2, on the basis of example 2, the inner surface layer 41, the middle interlayer 42 and the outer surface layer 43 are welded, heated and rolled to form a composite plate body, the thickness of the composite plate is not more than 450mm, three welding spots are arranged on each composite boundary line of the inner surface layer 41 and the outer surface layer 43, the spot welding length is 20mm-30mm, the composite boundary of the bonded metal composite plate is spot welded by argon arc welding in the manufacturing process, then the whole body is subjected to air extraction welding in a sealed vacuum chamber, the problems of high risk and environmental pollution in the manufacturing process of the metal composite plate by adopting an explosion compounding method in the prior art are overcome, the welding process is completely sealed in the manufacturing method, the safety is high and the environment is not polluted, the method belongs to a green environment-friendly process, the production of the metal composite plate can strictly control the welding process, the finished product rate of the manufactured composite steel plate is high, the welding quality and the welding performance of the metal composite plate can be ensured, the weld penetration is not less than 35mm when the periphery of a composite interface of the inner surface layer 41 and the outer surface layer 43 is welded, the rough rolling force of the composite plate is not less than 5000 tons, the rolling force of the finish rolling is not less than 5000 tons, the offline temperature of the stacking and slow cooling of the composite plate is 400-450 ℃, the time is more than 48 hours, the middle interlayer 42 is one of common carbon structural steel or low alloy structural steel, the plates are completely fused through heating and rolling the metal composite plate after welding, and the step-by-step heating temperature of the composite plate is higher to enable the welded metal composite plate to be better suitable for temperature transformation, so that the finished product rate and added value of the metal composite plate are improved.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.

Claims

1. A marine three-layer composite pipe is characterized in that: the concrete-filled steel tube comprises a composite steel tube (1), wherein a concrete layer (2) is compositely arranged on the outer wall of the composite steel tube (1), and a 3PE layer (3) is compositely arranged on the outer wall of the concrete layer (2); the composite steel pipe (1) is formed by rolling a composite plate (4), wherein the composite plate (4) is formed by compounding three layers of plates, and the three layers of plates are an inner surface layer (41), an intermediate layer (42) and an outer surface layer (43) from inside to outside in sequence.

2. A marine triple layer composite pipe as claimed in claim 1 wherein: the intermediate layer (42) is carbon steel.

3. A marine triple layer composite pipe as claimed in claim 2 wherein: the inner surface layer (41) is made of titanium steel, and the outer surface layer (43) is made of stainless steel.

4. A marine triple layer composite pipe as claimed in claim 3 wherein: the stainless steel layer is 304 stainless steel, 316 stainless steel or 2205 stainless steel.