Welding-free corrosion prevention device for inner wall of deep seawater intake pipe

Abstract

The invention relates to a welding-free deep seawater intake pipe inner wall corrosion prevention device which comprises a pipeline, a corrosion prevention structure and an annular rubber ring, a mounting groove is formed in one end of the pipeline, the corrosion prevention structure and the annular rubber ring are arranged in the mounting groove of the pipeline, and the corrosion prevention structure comprises an annular sacrificial anode metal block. A plurality of metal sheets are arranged at one end of the annular sacrificial anode metal block, each metal sheet is provided with a break angle, the metal sheets make contact with the bottom of the mounting groove, one end of the annular sacrificial anode metal block makes contact with the annular rubber ring, and the annular rubber ring is arranged on the outer side of the annular sacrificial anode metal block; the annular rubber ring and the metal sheet are in a compressed state after the pipeline is installed. By means of the anti-corrosion structure with the installation shape matched with the installation groove of the pipeline and the inner wall of the pipeline, the purpose of cathodic protection of the inner wall of the pipeline is achieved, and meanwhile the phenomenon that on-way resistance of internal fluid is greatly increased due to sudden change of the shape of the pipeline can be effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline anti-corrosion, and in particular to an anti-corrosion device for the inner wall of a deep seawater intake pipe that does not require welding. Background Art

[0002] Due to its characteristics of being sterile, pure, low-temperature stable, rich in trace elements, and easily absorbed by the human body, deep seawater can be used as a high-grade raw material to prepare healthcare and beauty products, etc., generating huge economic benefits. The temperature difference between deep seawater below 800 meters below sea level and surface seawater can be greater than 20 °C, and this temperature difference can be used for temperature difference power generation. In current research, temperature difference power generation and deep seawater utilization are often carried out simultaneously. In this case, the deep seawater intake method is mostly to vertically intake water from a floating platform using multiple short rigid pipes connected end to end to form an intake pipe with a total length of about 800 meters.

[0003] Seawater is corrosive. Currently, the anti-corrosion methods for pipelines mostly use spraying anti-corrosion coatings, installing sacrificial anode metal blocks, or using anti-corrosion materials. For the outer wall of the pipeline, the above methods are sufficient to meet the anti-corrosion requirements. However, for the inside of the pipeline, anti-corrosion coatings are usually toxic and are obviously not suitable for pumping deep seawater used to make healthcare and beauty products; if a sacrificial anode metal block is installed inside the pipeline, since the sacrificial anode metal block protrudes from the inner wall of the pipeline, during the water intake process, it will generate a large resistance, thereby increasing the energy consumption of the water pump, and the internal space of the pipeline is limited, making it difficult to install and replace the sacrificial anode metal block; if the entire pipeline is made of anti-corrosion materials, its mechanical properties are difficult to meet the requirements, and the price is expensive and the construction difficulty is large.

[0004] For the existing anti-corrosion methods for the inside of pipelines, anti-corrosion coatings are usually toxic and not applicable; installing sacrificial anode metal blocks increases the energy consumption of the water pump and is not easy to replace; while making the pipeline with anti-corrosion materials is expensive and has a large construction difficulty.

[0005] Therefore, we propose an anti-corrosion device for the inner wall of a deep seawater intake pipe that does not require welding. Summary of the Invention

[0006] The applicant of the present invention aims at the above-mentioned disadvantages in the existing production technology and provides an anti-corrosion device for the inner wall of a deep seawater intake pipe that does not require welding. Thus, by installing an anti-corrosion structure that fits the installation groove and the inner wall of the pipeline, while achieving the purpose of cathodic protection of the inner wall of the pipeline, it can effectively avoid the phenomenon of a large increase in the frictional resistance along the way caused by the sudden change in the shape of the pipeline for the internal fluid.

[0007] The technical solution adopted by the present invention is as follows:

[0008] An anti-corrosion device for the inner wall of a deep seawater intake pipe that does not require welding, comprising:

[0009] A pipeline, with an installation groove provided at one end thereof;

[0010] An anti-corrosion structure, arranged in the installation groove, the anti-corrosion structure including an annular sacrificial anode metal block;

[0011] An annular rubber ring, arranged in the installation groove;

[0012] Wherein, a plurality of metal sheets are provided at one end of the annular sacrificial anode metal block, the metal sheets have folding angles, the metal sheets are in contact with the bottom of the installation groove, one end of the annular sacrificial anode metal block is in contact with the annular rubber ring, and the annular rubber ring is arranged outside the annular sacrificial anode metal block;

[0013] Both the annular rubber ring and the metal sheets are in a compressed state after the pipeline installation is completed.

[0014] Its further features are as follows:

[0015] The metal sheets are in contact with the inner wall of the pipeline for cathodic protection of the inner wall of the pipeline.

[0016] The diameter of the installation groove is larger than the inner diameter of the pipeline and smaller than the outer diameter of the pipeline.

[0017] The outer diameters of the annular sacrificial anode metal block and the annular rubber ring fit the installation groove.

[0018] The inner diameters of the annular sacrificial anode metal block and the annular rubber ring are the same as the inner diameter of the pipeline to avoid increasing resistance.

[0019] Flanges are provided at both ends of the pipeline, and the pipelines are connected through the flanges.

[0020] The beneficial effects of the present invention are as follows:

[0021] The structure of the present invention is compact and reasonable, and the operation is convenient. By installing an anti-corrosion structure whose shape fits the installation groove and the inner wall of the pipeline, while achieving the purpose of cathodic protection of the inner wall of the pipeline, it can effectively avoid the phenomenon that the internal fluid causes a large increase in the frictional resistance due to the sudden change in the shape of the pipeline. The sacrificial anode anti-corrosion device is installed at the end of the pipeline and does not need to be welded to the pipeline, which is convenient for installation and replacement. An annular rubber ring is provided at the upper end of the anti-corrosion structure, which can not only ensure the sealing performance after the pipelines are installed, but also enable the metal sheets with folding angles to maintain a certain compressed state after installation. Thus, in the case of a certain working loss of the annular sacrificial anode metal block, the sacrificial anode metal block can still work normally, prolonging the service life of the anti-corrosion device; the structure is simple, the installation is convenient, and the anti-corrosion effect is obvious. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of the present invention.

[0023] Figure 2 is Figure 1 side view

[0024] Figure 3 is a schematic cross-sectional view of the present invention.

[0025] Figure 4 is an enlarged partial cross-sectional view of the present invention.

[0026] Figure 5 is a schematic diagram of the pipeline structure of the present invention.

[0027] Figure 6 is a cross-sectional view of the pipeline of the present invention.

[0028] Figure 7 is a schematic diagram of the anti-corrosion structure of the present invention.

[0029] Figure 8 is a cross-sectional view of the anti-corrosion structure of the present invention.

[0030] Figure 9 is a schematic diagram of the metal sheet of the present invention.

[0031] Figure 10 is a schematic diagram of the annular rubber ring of the present invention.

[0032] Figure 11 is a schematic diagram of the installation of two pipelines of the present invention.

[0033] Wherein: 1. Pipeline; 11. Flange; 12. Installation groove; 2. Anti-corrosion structure; 21. Annular sacrificial anode metal block; 22. Metal sheet; 3. Annular rubber ring. Specific embodiments

[0034] The following combines the drawings to illustrate the specific embodiments of the present invention.

[0035] As Figures 1-11 shown, an anti-corrosion device for the inner wall of a deep seawater intake pipe without welding includes a pipeline 1, an anti-corrosion structure 2, and an annular rubber ring 3.

[0036] Flanges 11 are provided at both ends of the pipeline 1, and the pipelines 1 are connected through the flanges 11.

[0037] An installation groove 12 is provided at one end of the pipeline 1, and the diameter d groove of the installation groove 12 is greater than the inner diameter d of the pipeline 1 and less than the outer diameter D of the pipeline 1.

[0038] The anti-corrosion structure 2 includes an annular sacrificial anode metal block 21 and metal sheets 22. A plurality of metal sheets 22 are provided, and the metal sheets 22 have a fold angle. One end of the annular sacrificial anode metal block 21 is fixedly connected to the metal sheet 22, and the other end of the annular sacrificial anode metal block 21 is fitted and installed with the annular rubber ring 3.

[0039] One end of the pipeline 1 is provided with an installation groove 12, and the other end of the pipeline 1 is not provided with the installation groove 12. The anti-corrosion structure 2 and the annular rubber ring 3 are arranged in the installation groove 12. One end of the annular sacrificial anode metal block 21 with a metal sheet 22 contacts the bottom of the installation groove 12 through the metal sheet 22, and the other end of the annular sacrificial anode metal block 21 contacts the annular rubber ring 3; the annular rubber ring 3 is arranged outside the annular sacrificial anode metal block 21.

[0040] The outer diameters of the annular sacrificial anode metal block 21 and the annular rubber ring 3 fit the installation groove 12. The inner diameters of the annular sacrificial anode metal block 21 and the annular rubber ring 3 are the same as the inner diameter of the pipeline 1. It can effectively avoid the phenomenon that the internal fluid causes a large increase in the frictional resistance along the way due to the sudden change in the shape of the pipeline 1.

[0041] The annular rubber ring 3 and the metal sheet 22 are in a compressed state after the pipeline 1 is installed. The metal sheet 22 contacts the inner wall of the pipeline 1, playing a role in cathodic protection of the inner wall of the pipeline 1.

[0042] By installing the anti-corrosion structure 2 whose shape fits the installation groove 12 of the pipeline 1 and the inner wall of the pipeline 1, while achieving the purpose of cathodic protection of the inner wall of the pipeline 1, it can effectively avoid the phenomenon that the internal fluid causes a large increase in the frictional resistance along the way due to the sudden change in the shape of the pipeline 1. The sacrificial anode anti-corrosion device is installed at the end of the pipeline 1 and does not need to be welded to the pipeline 1, which is convenient for installation and replacement. The upper end of the anti-corrosion structure 2 is provided with an annular rubber ring 3, which can not only ensure the sealing performance after the pipeline 1 is installed, but also make the metal sheet 22 with a fold angle remain in a certain compressed state after installation. Furthermore, in the case of a certain working loss of the annular sacrificial anode metal block 21, the sacrificial anode metal block can still work normally, extending the service life of the anti-corrosion device; the structure is simple, the installation is convenient, and the anti-corrosion effect is obvious.

[0043] The above description is an explanation of the present invention, not a limitation of the invention. The scope defined by the present invention is referred to the claims. Within the protection scope of the present invention, any form of modification can be made.

Claims

1. A deep seawater intake pipe inner wall anti-corrosion device without welding, characterized in that: include: A pipe (1) having a mounting groove (12) at one end thereof; An anti-corrosion structure (2) is arranged in the mounting groove (12), and the anti-corrosion structure (2) comprises an annular sacrificial anode metal block (21); An annular rubber ring (3) is arranged in the mounting groove (12); One end of the annular sacrificial anode metal block (21) is provided with a plurality of metal sheets (22), the metal sheets (22) have folded corners, the metal sheets (22) are in contact with the bottom of the mounting groove (12), one end of the annular sacrificial anode metal block (21) is in contact with an annular rubber ring (3), and the annular rubber ring (3) is arranged outside the annular sacrificial anode metal block (21); The annular rubber ring (3) and the metal sheet (22) are both in a compressed state after the pipeline (1) is installed.

2. The deep seawater intake pipe inner wall anti-corrosion device without welding as claimed in claim 1, characterized in that: The metal sheet (22) is in contact with the inner wall of the pipeline (1) and is used for cathodic protection of the inner wall of the pipeline (1).

3. The anti-corrosion device for the inner wall of a deep seawater intake pipe without welding as claimed in claim 1, characterized in that: The diameter of the installation groove (12) is larger than the inner diameter of the pipeline (1) and smaller than the outer diameter of the pipeline (1).

4. The deep seawater intake pipe inner wall anti-corrosion device without welding as claimed in claim 3, characterized in that: The outer diameters of the annular sacrificial anode metal block (21) and the annular rubber ring (3) fit in with the mounting groove (12).

5. The deep seawater intake pipe inner wall anti-corrosion device without welding as claimed in claim 4, characterized in that: The inner diameters of the annular sacrificial anode metal block (21) and the annular rubber ring (3) are consistent with the inner diameter of the pipeline (1), thereby avoiding increasing resistance.

6. The deep seawater intake pipe inner wall anti-corrosion device without welding as claimed in claim 1, characterized in that: Flanges (11) are provided at both ends of the pipeline (1), and the pipelines (1) are connected via the flanges (11).

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