Stainless steel seamless steel tube for ocean engineering and assembling method of stainless steel seamless steel tube

Abstract

The stainless steel seamless steel pipe comprises a long pipe composed of a plurality of steel pipe bodies which are connected end to end, and modularized outer sleeve pipe fittings which are made of different materials and have different lengths are fixed to the long pipe according to different depths, seabed conditions and temperature areas. The modularized outer sleeve pipe fitting comprises outer sleeve pipe bodies, limiting rings and a plurality of connecting steel cables, each outer sleeve pipe body is composed of a left body and a right body, a plurality of connecting holes are formed in each outer sleeve pipe body in an array mode, and each connecting steel cable penetrates through the corresponding connecting hole and the corresponding limiting ring to connect the outer sleeve pipe bodies into a whole. Limiting buckles are fixed to the connecting positions of the connecting steel cables and the limiting rings, a thick film is further wound on a pipe body composed of the outer sleeve main bodies, and a nickel base alloy belt is further wound on the pipe body on the periphery of the thick film. According to different depths, seabed conditions and temperature areas, the corresponding modularized outer sleeve pipe fittings can be selected to be fixed to the steel pipe, and the advantage of being relatively easy and convenient to assemble is further achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of stainless steel seamless steel pipes for ocean engineering and its assembly method. BACKGROUND

[0002] In prior art, stainless steel seamless steel pipes for ocean engineering generally adopt multi-layer sleeve pipe technology to adapt to complex marine environment, the connection and limiting structure of the sleeve pipe and internal steel pipe of this kind of steel pipe is complex, and the connection and limiting between each layer of sleeve pipe between two pipe bodies are also more difficult, which brings inconvenience to production and assembly; in addition, different depths, seabed conditions and temperature regions require different sleeve pipes for steel pipe, and the above-mentioned prefabricated structure steel pipe obviously also has great deficiency in adaptability. SUMMARY

[0003] The present application aims to overcome the deficiency of the prior art, and provides a kind of stainless steel seamless steel pipes for ocean engineering and its assembly method, which can select corresponding modularized outer sleeve pipe piece according to different depths, seabed conditions and temperature regions and fix it to the steel pipe, and also has the advantages of relatively simple and convenient assembly.

[0004] The technical scheme of the present application is: a kind of stainless steel seamless steel pipes for ocean engineering, comprising long pipe composed of multiple steel pipe bodies connected end to end, different material and length modularized outer sleeve pipe pieces are fixed on the long pipe according to different depths, seabed conditions and temperature regions; The modularized outer sleeve pipe piece comprises outer sleeve pipe body, limiting ring and multiple connecting steel cables; Each outer sleeve pipe body is composed of left body and right body, each outer sleeve pipe body is buckled on the steel pipe body and connected end to end, each outer sleeve pipe body has installation slot corresponding to limiting ring at both ends, each installation slot has a recess ring, each outer sleeve pipe body has multiple connecting holes arrayed through the recess rings at both ends of the outer sleeve pipe body, each connecting steel cable passes through corresponding connecting hole and limiting ring to connect each outer sleeve pipe body into one, limiting buckle is fixed at the connection of each connecting steel cable and limiting ring, each limiting ring is limited at the connection of two outer sleeve pipe bodies, each limiting buckle is clamped in the recess ring, and each connecting steel cable cooperates with limiting ring to limit the axial and radial direction of outer sleeve pipe body; Thick film is also wound on the pipe body of each outer sleeve pipe body, and nickel-based alloy belt is also wound on the outer periphery of the pipe body.

[0005] Further, the two outer sleeve pipe bodies adjacent in front and back are buckled through clamping groove and clamping ring.

[0006] Further, the left body and the right body are buckled on the steel pipe body, and the convex strip is clamped into the corresponding groove body.

[0007] Furthermore, the outer periphery of the steel pipe body has staggered ribs arranged in a grid pattern, and the inner side of each left and right body has a groove corresponding to each rib, with each rib fitting into the groove on the corresponding left and right body.

[0008] Specifically, the rib is composed of multiple first ribs arranged along the axial direction of the steel pipe body and second ribs arranged along the radial direction of the steel pipe body. The cross-section of the first rib and the second rib is a triangle with rounded corners at the outer end, and the height of the first rib is greater than the height of the second rib.

[0009] Furthermore, the outer periphery of the steel pipe body is also covered with a high-density polyethylene film. The high-density polyethylene film deforms and adheres to the ribs and the outer wall of the steel pipe body after being squeezed by the inner wall of the left or right body.

[0010] Optionally, the outer casing body is made of concrete, ceramic, fiber-reinforced polymer, aluminum alloy, or fiberglass, and the outer casing body may or may not be lined with an insulation layer.

[0011] Furthermore, it also includes a steel pipe connector, which has a threaded end at each end and a rib structure corresponding to the main body of the steel pipe on its outer periphery. Each main body of the steel pipe has an internal thread at both ends, and the steel pipe connector is connected between the two main bodies of the steel pipe.

[0012] Furthermore, the connection between the steel pipe connector and the steel pipe body is also provided with metal winding wire and sealing ring.

[0013] A method for assembling seamless stainless steel pipes for marine engineering includes the following steps: Step 1: Measure the seawater depth, seabed conditions, and temperature in the area where the steel pipe will be applied; Step 2: Connect the main body of the steel pipe to obtain a long pipe of appropriate length. During the connection process, insert multiple limiting rings at appropriate positions on the long pipe. Step 3: Select an outer tube body of appropriate material and length according to the different environments of the application area of ​​the steel pipe body. Attach the left and right bodies of the corresponding outer tube body to the outside of the steel pipe body, and thread connecting steel cables through the left and right bodies respectively. Use limit buckles to limit the connection between the steel cables and the limit rings. Finally, connect multiple sets of outer tube bodies to form a whole on the outside of the steel pipe body. Step 4: Wrap a thick film around the tube body, which consists of multiple outer sleeves. Then, wrap a nickel-based alloy strip around the tube body outside the thick film. The nickel-based alloy strip is wound in an interlocking spiral winding method to complete the assembly.

[0014] The beneficial effects of the present application are: the corresponding modularized outer sleeve parts can be selected and fixed to the steel pipe according to different depths, seabed conditions and temperature zones, since the outer sleeve body is divided into a left body and a right body, the left body and the right body of any length and different materials can be selected and combined, so that the stainless steel seamless steel pipe can adapt to various complex marine environments. The outer sleeve bodies are connected through the connecting steel ropes arranged in the outer sleeve bodies, the connecting steel ropes limit the axial direction of the outer sleeve bodies, the limiting disc limits the radial direction of the connecting steel ropes, and the limiting disc is fixed in the mounting groove at the end of the left body and the right body, so that the outer sleeve bodies form a continuous and reliable whole and are not easy to separate. The thick film wound on the pipe body composed of the outer sleeve bodies mainly plays a role in closing the joints, and further binds the outer sleeve bodies to maintain a whole. In addition, the thick film formed by winding has a certain thickness and can also play a certain buffering role. The nickel-based alloy strip arranged outside the thick film further plays a role in binding the outer sleeve bodies and also plays a protective role. The nickel-based alloy itself has excellent corrosion resistance and can be used for a long time in deep sea environment.

[0015] In summary, compared with the steel pipe provided with multiple sleeve pipes and coatings, the stainless steel seamless steel pipe with the above structure has the advantages of convenient construction (assembly), more flexible selection, and adaptability to more complex use environments, and the final product has no obvious connection points on the outer surface, which can reduce the influence of ocean currents and the like on the stability of the steel pipe structure. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a transverse sectional view of the present application; Figure 2 is Figure 1 an enlarged view of A part in the figure; Figure 3 is a longitudinal sectional view of the present application; Figure 4 is Figure 3 an enlarged view of B part in the figure; Figure 5 is a transverse sectional view of the steel pipe body in the present application; Figure 6 is Figure 5 an enlarged view of C part in the figure; Figure 7 is a structure schematic view of the steel pipe body in the present application; Figure 8 is a structure schematic view of the connection between the two steel pipe bodies in the present application.

[0017] In the figure: steel pipe body 1, outer sleeve body 2, limiting ring 3, connecting steel cable 4, left body 5, right body 6, limiting buckle 7, thick film 8, nickel-based alloy belt 9, clamping groove 10, clamping ring 11, groove body 12, convex strip 13, first convex rib 14, second convex rib 15, high-density polyethylene film 16, steel pipe connecting piece 17, screwing end 18, metal winding wire 19, sealing ring 20. DETAILED DESCRIPTION

[0018] The technical solutions of the present application will be further specifically described below by examples in combination with the drawings.

[0019] In combination Figures 1-8 As shown in the figure, a stainless steel seamless steel pipe for ocean engineering comprises a plurality of steel pipe bodies 1 connected end to end, and a plurality of modular outer sleeve pieces of different materials and lengths are fixed on a long pipe composed of the plurality of steel pipe bodies 1 according to different depths, seabed conditions and temperature zones; The modular outer sleeve pieces comprise outer sleeve bodies 2, limiting rings 3 and a plurality of connecting steel cables 4. Each of the outer sleeve bodies 2 is composed of a left body 5 and a right body 6, each of the outer sleeve bodies 2 is buckled on the steel pipe body 1 and connected end to end, each of the outer sleeve bodies 2 has a mounting groove corresponding to the limiting ring 3 at each end, each of the mounting grooves has a recessed ring therein, each of the outer sleeve bodies 2 has a plurality of connecting holes arrayed through the recessed rings at both ends of the outer sleeve body 2, each of the connecting steel cables 4 passes through the corresponding connecting hole and limiting ring 3 to connect the outer sleeve bodies 2 into one body, each of the connecting steel cables 4 and limiting rings 3 is fixed with a limiting buckle 7 at the connecting position, each of the limiting rings 3 is limited at the connecting position of the two outer sleeve bodies 2, each of the limiting buckles 7 is clamped into the recessed ring, and each of the connecting steel cables 4 cooperates with the limiting ring 3 to limit the axial and radial directions of the outer sleeve body 2, so that the left body 5 and the right body 6 of each of the outer sleeve bodies 2 are not easy to separate and are arranged closely to the outer wall of the steel pipe, and each of the outer sleeve bodies 2 forms a continuous whole. The pipe body composed of each of the outer sleeve bodies 2 is further wound with a thick film 8 for buffering and sealing the joint, and the pipe body around the thick film 8 is further wound with a nickel-based alloy belt 9 for protection.

[0020] In the above structure, the corresponding modular outer sleeve pieces can be selected and fixed to the steel pipe according to different depths, seabed conditions and temperature zones, and since the outer sleeve body 2 is divided into the left body 5 and the right body 6, the left body 5 and the right body 6 of any length and different materials can be selected and combined, so that the stainless steel seamless steel pipe can adapt to various complex marine environments. The outer sleeve bodies 2 are connected by the connecting steel cables 4 arranged in the outer sleeve bodies 2, the connecting steel cables 4 limit the axial direction of the outer sleeve bodies 2, and the limiting disc limits the radial direction of the connecting steel cables 4, and the limiting disc is fixed in the mounting groove at the end of the left body 5 and the right body 6, so that the outer sleeve bodies 2 form a continuous and reliable whole and are not easy to separate; The thick film 8 wound on the pipe body formed by the outer sleeve bodies 2 mainly plays a role in closing the joints, and further binds the outer sleeve bodies 2 to maintain a whole. In addition, the thick film 8 formed by winding has a certain thickness, and also plays a certain buffering role. The nickel-based alloy strip 9 arranged outside the thick film 8 further plays a role in binding the outer sleeve bodies 2, and also plays a protective role. The nickel-based alloy itself has excellent corrosion resistance and can be used for a long time in a deep sea environment.

[0021] In summary, the stainless steel seamless pipe with the above structure has the advantages of convenient construction (assembly), more flexible selection, and adaptability to more complex use environments compared to the steel pipe with multiple sleeve pipes and coatings arranged outside the steel pipe. The final product has no obvious connection points on the outside, which can reduce the influence of ocean currents and other factors on the stability of the steel pipe structure.

[0022] In another embodiment, as shown in Figure 3 and Figure 4 , the two ends of each of the left body 5 and the right body 6 are respectively provided with corresponding clamping grooves 10 and clamping rings 11, and the two outer sleeve bodies 2 adjacent in front and back are clamped by the clamping grooves 10 and the clamping rings 11 to further improve the reliability of the connection between the outer sleeve bodies 2.

[0023] In another embodiment, as shown in Figure 2 , the left body 5 and the right body 6 respectively have corresponding groove bodies 12 and protrusions 13 on the two sides. After the left body 5 and the right body 6 are clamped on the steel pipe body 1, the protrusions 13 are clamped into the corresponding groove bodies 12, so that the connection between the left body 5 and the right body 6 is more reliable.

[0024] In another embodiment, as shown in Figure 3 and Figure 7 , the steel pipe body 1 has staggered protrusions arranged in the shape of a cross. The inner sides of each of the left body 5 and the right body 6 have recesses corresponding to the protrusions. Each of the protrusions is clamped into the recess on the corresponding left body 5 and right body 6. In this way, the left body 5, the right body 6, and the steel pipe body 1 are also limited by the recesses and the protrusions, and the left body 5, the right body 6, and the steel pipe body 1 are not easy to displace relative to each other.

[0025] In another embodiment, as shown in Figure 5 and Figure 7As shown, the convex ribs are composed of a plurality of first convex ribs 14 arranged axially along the steel pipe body 1 and second convex ribs 15 arranged radially along the steel pipe body 1, the cross section of the first convex ribs 14 and the second convex ribs 15 is a triangle with rounded corners at the outer end, the height of the first convex ribs 14 is greater than the height of the second convex ribs 15, in this way, the strength and tensile strength of the steel pipe in the axial and radial directions are effectively improved, and considering that the steel cable needs to be arranged on the outer sleeve body 2, the second convex ribs 15 are not too high to affect the thickness design of the outer sleeve, and the manufacturing cost is prevented from being greatly increased.

[0026] In another embodiment, as shown in Figure 2 , Figure 5 and Figure 6 , the outer periphery of the steel pipe body 1 is also coated with a high-density polyethylene film 16, which is deformed and attached to the outer wall of each convex rib and the steel pipe body 1 after being extruded by the inner wall of the left body 5 or the right body 6.

[0027] In the above structure, the cross-shaped convex ribs not only serve as a limit for each left body 5 and right body 6, but also divide the outer wall of the steel pipe body 1 into a plurality of square units. When a small amount of seawater seeps into a certain unit, the surrounding convex ribs in cooperation with the high-density polyethylene film 16 will block the seawater in the unit, preventing the seepage of seawater on the outer wall of the steel pipe from spreading, so as to avoid causing more serious corrosion.

[0028] In another embodiment, the material of the outer sleeve body 2 is concrete, ceramic, fiber-reinforced polymer, aluminum alloy or glass steel, and the outer sleeve body 2 is lined or not lined with a thermal insulation layer.

[0029] Among them, the outer sleeve of concrete material mainly plays a counterweight role to provide in-place stability, resistance to wave and current uplift; The outer sleeve of ceramic material mainly plays a role of wear protection and heat preservation; The outer sleeve of fiber-reinforced polymer material has good flexibility, can prevent impact and is fatigue-resistant, and is mainly applied to the connection between two steel pipes; The outer sleeve of aluminum alloy material has the advantages of light weight and corrosion resistance; The outer sleeve of glass steel material has the advantages of insulation and corrosion resistance; The specific material is selected according to the depth, seabed conditions and temperature region of the steel pipe.

[0030] In another embodiment, as shown in Figure 8 , it further comprises a steel pipe connector 17, the steel pipe connector 17 has a threaded end 18 at both ends, the outer periphery of the steel pipe connector 17 has a convex rib structure corresponding to the steel pipe body 1, the both ends of each steel pipe body 1 have an internal thread, and the steel pipe connector 17 is connected between the two steel pipe bodies 1.

[0031] In another embodiment, as shown in Figure 8 The connection between the steel pipe connector 17 and the steel pipe body 1 is also provided with a metal winding wire 19 and a sealing ring 20 to ensure the sealing of the connection between the steel pipe connector 17 and the steel pipe body 1.

[0032] An assembling method of a stainless steel seamless pipe for ocean engineering, comprising the following steps: Step one, measure the depth of seawater, seabed conditions and temperature in the application area of the steel pipe; Step two, connect the steel pipe body 1 to obtain a long pipe with appropriate length, and during the connection process, a plurality of limiting rings 3 are sleeved on the long pipe at appropriate positions to avoid the inconvenience of placing the limiting rings 3 when the length of the long pipe is too long; Step three, select the outer sleeve body 2 with appropriate material and length according to the different environments of the application area of the steel pipe body 1, and buckle the left body 5 and the right body 6 corresponding to the outer sleeve body 2 on the outer side of the steel pipe body 1 respectively, thread the connecting steel cable 4 on the left body 5 and the right body 6 respectively, and use the limiting buckle 7 to limit the connection between the steel cable and the limiting ring 3, and finally connect a plurality of outer sleeve bodies 2 on the outer side of the steel pipe body 1 into a whole; Step four, wrap the thick film 8 on the pipe body composed of a plurality of outer sleeve bodies 2, and then wrap the nickel-based alloy strip 9 on the pipe body outside the thick film 8, and the wrapping method of the nickel-based alloy strip 9 is interlocking spiral wrapping method to avoid the nickel-based alloy strip 9 from scattering or falling off, and the assembling is completed.

Claims

1. A stainless steel seamless steel pipe for ocean engineering, comprising a long pipe composed of a plurality of steel pipe bodies (1) connected end to end, characterized in that, The long pipe is fixed with modular jacket pieces of different materials and lengths according to different depths, seabed conditions and temperature zones; The modular jacket piece comprises a jacket body (2), a limiting ring (3) and a plurality of connecting steel ropes (4); Each jacket body (2) is composed of a left body (5) and a right body (6), each jacket body (2) is buckled on the steel pipe body (1) and connected end to end, each jacket body (2) is provided with a mounting groove corresponding to the limiting ring (3) at each end, each mounting groove is provided with a concave ring, a plurality of connecting holes penetrating the concave rings at both ends of the jacket body (2) are arranged on each jacket body (2), each connecting steel rope (4) penetrates the corresponding connecting hole and limiting ring (3) to connect each jacket body (2) into one, a limiting buckle (7) is fixed at the connection between each connecting steel rope (4) and limiting ring (3), each limiting ring (3) is limited at the connection between the two jacket bodies (2), each limiting buckle (7) is clamped in the concave ring, and the axial and radial positions of the jacket body (2) are limited by the connecting steel rope (4) and the limiting ring (3). A thick film (8) is further wound on the pipe body composed of each jacket body (2), and a nickel-based alloy strip (9) is further wound on the pipe body outside the thick film (8).

2. A stainless steel seamless pipe for ocean engineering according to claim 1, characterized by Each left body (5) and right body (6) is provided with a corresponding clamping groove (10) and clamping ring (11) at both ends, and the front and rear two jacket bodies (2) are buckled through the clamping groove (10) and clamping ring (11).

3. A stainless steel seamless pipe for ocean engineering according to claim 2, characterized by The left body (5) and right body (6) are respectively provided with a corresponding groove body (12) and protruding strip (13) at both sides, and the protruding strip (13) is clamped into the corresponding groove body (12) after the left body (5) and right body (6) are buckled on the steel pipe body (1).

4. A stainless steel seamless pipe for ocean engineering according to claim 3, characterized by The steel pipe body (1) is provided with protruding ribs arranged in a staggered cross shape on the outer periphery, and the inner sides of each left body (5) and right body (6) are respectively provided with recesses corresponding to each protruding rib, and each protruding rib is clamped into the recess on the corresponding left body (5) and right body (6).

5. A stainless steel seamless pipe for ocean engineering according to claim 4, characterized by The protruding ribs are composed of a plurality of first protruding ribs (14) arranged in the axial direction of the steel pipe body (1) and a plurality of second protruding ribs (15) arranged in the radial direction of the steel pipe body (1), the cross sections of the first protruding ribs (14) and the second protruding ribs (15) are all triangular with rounded corners at the outer ends, and the height of the first protruding ribs (14) is greater than the height of the second protruding ribs (15).

6. A stainless steel seamless pipe for ocean engineering according to claim 5, characterized by The outer periphery of the steel pipe body (1) is further coated with a high-density polyethylene film (16), and the high-density polyethylene film (16) is deformed and attached to each protruding rib and the outer wall of the steel pipe body (1) after being extruded by the inner wall of the left body (5) or the right body (6).

7. A stainless steel seamless pipe for ocean engineering according to claim 6, characterized by The material of the jacket body (2) is concrete, ceramic, fiber reinforced polymer, aluminum alloy or glass steel, and the jacket body (2) is lined or not lined with a thermal insulation layer.

8. A stainless steel seamless pipe for ocean engineering according to claim 7, characterized by Also included are steel pipe connectors (17) having threaded ends (18) at both ends, and having a rib structure corresponding to the steel pipe body (1) on the outer periphery, the steel pipe body (1) having an internal thread at both ends, the steel pipe connector (17) being connected between two steel pipe bodies (1).

9. A stainless steel seamless pipe for ocean engineering according to claim 8, characterized by The connection between the steel pipe connector (17) and the steel pipe body (1) is also provided with a metal winding wire (19) and a sealing ring (20).

10. A method of assembling a stainless steel seamless pipe for ocean engineering according to any one of claims 1 to 9, characterized in that, The method comprises the following steps: Step 1: Measure the depth of the sea water, the condition of the seabed and the temperature in the area where the steel pipe is to be applied. Step 2: Connect the steel pipe bodies (1) to obtain a long pipe of appropriate length, and during the connection process, a plurality of limiting rings (3) are sleeved at appropriate positions of the long pipe. Step 3: According to the different environments of the application area of the steel pipe body (1), select the appropriate material and length of the outer sleeve body (2), and buckle the left body (5) and the right body (6) corresponding to the outer sleeve body (2) on the outer side of the steel pipe body (1), respectively, and pass the connecting steel cable (4) through the left body (5) and the right body (6), respectively, and use the limiting buckle (7) to limit the connection between the steel cable and the limiting ring (3), and finally connect a plurality of outer sleeve bodies (2) on the outer side of the steel pipe body (1) into a whole. Step 4: Wrap the thick film (8) on the pipe body composed of a plurality of outer sleeve bodies (2), and then wrap the nickel-based alloy strip (9) on the pipe body outside the thick film (8), and the wrapping method of the nickel-based alloy strip (9) is interlocking spiral wrapping, and the assembly is completed.

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