Seamless steel tube with double coatings on inner wall and outer wall

Abstract

The utility model discloses an inner wall and outer wall double-coating seamless steel pipe which comprises an upper splicing pipeline, the lower end of the upper splicing pipeline is movably connected with a lower splicing pipeline, the upper splicing pipeline is fixedly connected with symmetrical tensioning strips, the side faces of the upper splicing pipeline and the lower splicing pipeline are movably connected with an external pipe, the tensioning strips are provided with a plurality of tensioning grooves, and the tensioning grooves are fixedly connected with the external pipe. Symmetrical clamping blocks are fixedly connected to the side face of the lower splicing pipeline, fixing grooves are formed in the side face of the upper splicing pipeline and the side face of the lower splicing pipeline, symmetrical connecting blocks are fixedly connected into the fixing grooves, and tightening bolts are movably connected into threaded grooves. Through the structure, the assembly process of the seamless steel pipe is simplified, the installation time and the labor cost are reduced, the construction efficiency is improved, the sealing performance of the pipeline joint is ensured, the safety and the stability of fluid transmission are guaranteed, the corrosion resistance and the wear resistance of the seamless steel pipe are improved, and the ageing resistance of the seamless steel pipe is enhanced; and the overall strength and stability of the pipeline are enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of seamless steel pipes, particularly to a double-coating seamless steel pipe with inner and outer walls. BACKGROUND

[0002] As an important engineering material, seamless steel pipes have been widely used in many fields such as petroleum, chemical industry, power, machinery manufacturing, and construction. Their excellent mechanical properties, corrosion resistance, and good processing performance make them the preferred material for fluid transportation, structural support, and machinery manufacturing. However, in specific application environments, the corrosion resistance and wear resistance of seamless steel pipes face severe challenges. For example, in corrosive media, the inner and outer walls of the steel pipe are easily eroded, leading to shortened pipe life and even leakage accidents; in abrasive environments, the surface of the steel pipe is easily worn, affecting its performance and safety.

[0003] To solve these problems, the traditional approach is to coat the seamless steel pipe. The coating can effectively isolate the steel pipe from direct contact with corrosive media or abrasive substances, thereby improving the corrosion resistance and wear resistance of the steel pipe. However, traditional coating treatment mostly only targets the inner or outer wall of the steel pipe for single coating treatment. This treatment method, although improving the protective performance of the steel pipe to some extent, still has its limitations. SUMMARY

[0004] The purpose of the utility model is to provide a double-coating seamless steel pipe with inner and outer walls, which simplifies the assembly process of the seamless steel pipe, reduces installation time and labor costs, improves construction efficiency, ensures the sealing of the pipe connection, guarantees the safety and stability of fluid transmission, improves the corrosion resistance and wear resistance of the seamless steel pipe, enhances its anti-aging ability, and enhances the overall strength and stability of the pipe.

[0005] To achieve the above purpose, a double-coating seamless steel pipe with inner and outer walls is provided, which includes an upper spliced pipe, the lower end of which is movably connected to a lower spliced pipe, the upper spliced pipe is fixedly connected with symmetrical tension strips, and the side surfaces of the upper and lower spliced pipes are movably connected with an external pipe.

[0006] According to the double-coating seamless steel pipe with inner and outer walls, a plurality of tension grooves are formed on the tension strips, the side surface of the lower spliced pipe is fixedly connected with symmetrical clamping blocks, and the clamping blocks are movably connected in the tension grooves.

[0007] According to the double-coating seamless steel pipe with inner and outer walls, fixed grooves are formed on the side surfaces of the upper and lower spliced pipes, symmetrical connecting blocks are fixedly connected in the fixed grooves, and screw grooves are formed in the connecting blocks.

[0008] According to the inner and outer wall double-coated seamless steel pipe, the threaded groove is movably connected with a tightening bolt, the upper end of the tightening bolt is provided with a cross groove, and the lower end of the tightening bolt is movably connected with a nut.

[0009] According to the inner and outer wall double-coated seamless steel pipe, the side of the upper spliced pipe is fixedly connected with symmetrical sealing blocks, the upper spliced pipe is provided with symmetrical second sealing grooves, the sealing blocks are movably connected with the second sealing grooves, the second sealing grooves are movably connected with second sealing strips, and the other side of the second sealing strips is movably connected with the second sealing strips.

[0010] According to the inner and outer wall double-coated seamless steel pipe, the side of the upper spliced pipe, the lower spliced pipe and the outer connecting pipe is movably connected with corresponding sealing clamping strips, the side of the outer connecting pipe is provided with a first sealing groove, the sealing clamping strips are movably connected with the first sealing groove, the first sealing groove is movably connected with a first sealing strip, and the other side of the first sealing strip is movably connected with the sealing clamping strips.

[0011] According to the inner and outer wall double-coated seamless steel pipe, the outer side of the upper spliced pipe, the lower spliced pipe and the outer connecting pipe is movably connected with an outer coating, and the inner side of the upper spliced pipe, the lower spliced pipe and the outer connecting pipe is movably connected with an inner coating, and the inner coating is fixedly connected with a supporting cylinder.

[0012] Beneficial effects:

[0013] 1. The cooperation mechanism of the tightening strip and the clamping block, and the fastening structure of the tightening bolt and the nut, make the connection between the upper spliced pipe and the lower spliced pipe stable and convenient. This design simplifies the assembly process of the seamless steel pipe, reduces the installation time and labor cost, and improves the construction efficiency. The clever design of the sealing block and the second sealing groove, the sealing clamping strip and the first sealing groove, combined with the close fit of the second sealing strip and the first sealing strip, ensures the sealing of the pipe connection. This multiple sealing structure effectively prevents fluid leakage, ensuring the safety and stability of fluid transmission, especially suitable for the transmission of high pressure, high temperature or corrosive medium.

[0014] 2. The outer coating and the inner coating arranged on the inner and outer walls respectively improve the corrosion resistance and wear resistance of the seamless steel pipe, and enhance its anti-aging ability. The outer coating can effectively resist the erosion of the external environment, and the inner coating ensures the smoothness of fluid transmission and the cleanliness of the pipe, thereby significantly prolonging the service life of the seamless steel pipe. By arranging the supporting cylinder inside the upper spliced pipe and the lower spliced pipe, the overall strength and stability of the pipe are enhanced. The seamless steel pipe can maintain the integrity and stability of the structure when subjected to harsh conditions such as high pressure, high temperature or vibration, thereby improving its safety and reliability.

[0015] The additional aspects and advantages of the present application will be given in part in the following description, some will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present application will be further described below in conjunction with the drawings and embodiments.

[0017] Figure 1 A perspective view of the inner and outer wall double-coated seamless steel pipe according to the present application;

[0018] Figure 2 A coating schematic view of the inner and outer wall double-coated seamless steel pipe according to the present application;

[0019] Figure 3 A pipe cross-sectional view of the inner and outer wall double-coated seamless steel pipe according to the present application;

[0020] Figure 4 A tension strip cross-sectional view of the inner and outer wall double-coated seamless steel pipe according to the present application;

[0021] Figure 5 A tightening bolt cross-sectional view of the inner and outer wall double-coated seamless steel pipe according to the present application;

[0022] Figure 6 A cross-sectional view of the inner and outer wall double-coated seamless steel pipe according to the present application Figure 5 A local enlarged view of A.

[0023] LEGEND:

[0024] 1, upper pipe; 2, lower pipe; 3, tension strip; 4, tension groove; 5, clamping block; 6, fixing groove; 7, connecting block; 8, tightening bolt; 9, external pipe; 10, inner coating; 11, supporting cylinder; 12, outer coating; 13, sealing clamping strip; 14, first sealing groove; 15, first sealing strip; 16, second sealing groove; 17, sealing block; 18, second sealing strip; 19, cross groove; 20, threaded groove; 21, nut. DETAILED DESCRIPTION

[0025] This part will describe the specific embodiments of the present application in detail, the preferred embodiments of the present application are shown in the drawings, the role of the drawings is to supplement the description of the text part with figures, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the present application, but it cannot be understood as a limitation on the protection scope of the present application.

[0026] REFERENCE Figures 1-6The utility model discloses an inner and outer wall double coating seamless steel pipe, it includes upper spliced pipe 1, the lower end of upper spliced pipe 1 swing joint has lower spliced pipe 2, and the fixed connection of upper spliced pipe 1 has symmetrical tension strip 3, and the side of upper spliced pipe 1, lower spliced pipe 2 swing joint has external pipe 9.

[0027] Tension groove 4 is set up on the tension strip 3, and the side of lower spliced pipe 2 is fixedly connected with symmetrical clamping block 5, and clamping block 5 swing joint is in tension groove 4, realizes the close locking between upper and lower spliced pipe, prevents the loosening in the use process.

[0028] The side of upper spliced pipe 1, lower spliced pipe 2 is set up with fixed slot 6, and fixed slot 6 is fixedly connected with symmetrical connecting block 7, and screw groove 20 is set up in connecting block 7.

[0029] Screw groove 20 swing joint has tight bolt 8, and the upper end of tight bolt 8 is set up with cross slot 19, and the lower end of tight bolt 8 swing joint has nut 21, and further reinforce the connection between upper and lower spliced pipe 2.

[0030] The side of upper spliced pipe 1 is fixedly connected with symmetrical sealing block 17, and the upper of lower spliced pipe 2 is set up with symmetrical second sealing groove 16, and sealing block 17 swing joint is in second sealing groove 16, and second sealing groove 16 swing joint has second sealing strip 18, and the other side of second sealing strip 18 swing joint is in second sealing strip 18, ensure that it can be uniformly stressed, keep the best sealed state.

[0031] The side of upper spliced pipe 1, lower spliced pipe 2 is fixedly connected with corresponding sealing clamping strip 13, and the side of external pipe 9 is set up with first sealing groove 14, and sealing clamping strip 13 swing joint is in first sealing groove 14, and first sealing groove 14 swing joint has first sealing strip 15, and the other side of first sealing strip 15 swing joint is in sealing clamping strip 13, forms another solid sealing barrier.

[0032] The outside of upper spliced pipe 1, lower spliced pipe 2, external pipe 9 swing joint has outer coating 12, and the inside of upper spliced pipe 1, lower spliced pipe 2, external pipe 9 swing joint has inner coating 10, and inner coating 10 is fixedly connected with support cylinder 11, effectively supports the pipeline structure, prevents the deformation or rupture due to internal pressure or external force.

[0033] Working principle:

[0034] The seamless steel pipe is mainly composed of the upper spliced pipe 1 and the lower spliced pipe 2, and the two are movably connected through a clever mechanical structure. The lower end of the upper spliced pipe 1 is designed with an interface matched with the lower spliced pipe 2, so that the two can be tightly spliced together. The two sides of the upper spliced pipe 1 are fixedly connected with symmetrical tension strips 3, and a plurality of tension grooves 4 are formed in the tension strips 3. The side of the lower spliced pipe 2 is fixedly connected with symmetrical clamping blocks 5, and the clamping blocks 5 can be movably embedded into the tension grooves 4, so as to realize the tight locking between the upper and lower spliced pipes 2 and prevent loosening in the use process. The side of the upper spliced pipe 1 and the lower spliced pipe 2 is also provided with fixing grooves 6, and symmetrical connecting blocks 7 are fixedly connected in the fixing grooves 6. Thread grooves 20 are designed in the connecting blocks 7 for accommodating tightening bolts 8. A cross groove 19 is formed on the tightening bolt 8, which facilitates the tightening operation by using a screwdriver or the like. The lower end is movably connected with a nut 21, and by rotating the tightening bolt 8, the nut 21 can be tightly matched with the tightening bolt 8, so as to reinforce the connection between the upper and lower pipes. The side of the upper spliced pipe 1 is fixedly connected with symmetrical sealing blocks 17, and the lower spliced pipe 2 is provided with symmetrical second sealing grooves 16. The sealing blocks 17 can be accurately movably embedded into the second sealing grooves 16 to form a preliminary sealing effect. Second sealing strips 18 are movably connected in the second sealing grooves 16, and the sealing strips are tightly attached between the sealing blocks 17 and the second sealing grooves 16 to effectively prevent liquid or gas leakage. The side of the upper spliced pipe 1 and the lower spliced pipe 2 is also fixedly connected with corresponding sealing clamping strips 13, and the sealing clamping strips 13 are matched with first sealing grooves 14 formed on the side of an external pipe 9. When the external pipe 9 is connected with the upper and lower spliced pipes 2, the sealing clamping strips 13 can be accurately movably embedded into the first sealing grooves 14. First sealing strips 15 are movably connected in the first sealing grooves 14, and the sealing strips are tightly attached between the sealing clamping strips 13 and the first sealing grooves 14 to form another solid sealing barrier. The outer sides of the upper spliced pipe 1, the lower spliced pipe 2 and the external pipe 9 are movably connected with an outer coating 12 to prolong the service life of the steel pipe. The inner side of the pipe is also movably connected with an inner coating 10 to further improve the corrosion resistance of the pipe. The inner coating 10 is also fixedly connected with support cylinders 11. The support cylinders 11 are uniformly distributed inside the pipe to effectively support the pipe structure and prevent deformation or rupture caused by internal pressure or external force.

[0035] The embodiments of the utility model are explained in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range of ordinary skilled in the art without departing from the purpose of the utility model.

Claims

1. A double-wall seamless steel pipe with internal and external coating, comprising an upper spliced pipe (1), characterized in that: The lower end of the upper splicing pipeline (1) is movably connected with a lower splicing pipeline (2), the upper splicing pipeline (1) is fixedly connected with symmetrical tension strips (3), and the side surfaces of the upper splicing pipeline (1) and the lower splicing pipeline (2) are movably connected with an external connecting pipe (9).

2. A double-coated seamless steel pipe according to claim 1, wherein A plurality of tension grooves (4) are formed in the tension strips (3), the side surface of the lower splicing pipeline (2) is fixedly connected with symmetrical clamping blocks (5), and the clamping blocks (5) are movably connected in the tension grooves (4).

3. The double-coated seamless steel pipe according to claim 1, wherein Fixed grooves (6) are formed in the side surfaces of the upper splicing pipeline (1) and the lower splicing pipeline (2), the fixed grooves (6) are fixedly connected with symmetrical connecting blocks (7), and threaded grooves (20) are formed in the connecting blocks (7).

4. A double-coated seamless steel pipe according to claim 3, wherein Upper tightening bolts (8) are movably connected in the threaded grooves (20), cross grooves (19) are formed in the upper ends of the upper tightening bolts (8), and nuts (21) are movably connected to the lower ends of the upper tightening bolts (8).

5. The double-coated seamless steel pipe according to claim 1, wherein Symmetrical sealing blocks (17) are fixedly connected to the side surfaces of the upper splicing pipeline (1), symmetrical second sealing grooves (16) are formed in the upper splicing pipeline (2), the sealing blocks (17) are movably connected in the second sealing grooves (16), second sealing strips (18) are movably connected in the second sealing grooves (16), and the other sides of the second sealing strips (18) are movably connected to the second sealing strips (18).

6. A double-coated seamless steel pipe according to claim 1, wherein Corresponding sealing clamping strips (13) are fixedly connected to the side surfaces of the upper splicing pipeline (1) and the lower splicing pipeline (2), first sealing grooves (14) are formed in the side surfaces of the external connecting pipe (9), the sealing clamping strips (13) are movably connected in the first sealing grooves (14), first sealing strips (15) are movably connected in the first sealing grooves (14), and the other sides of the first sealing strips (15) are movably connected to the sealing clamping strips (13).

7. The double-coated seamless steel pipe according to claim 1, wherein An outer coating layer (12) is movably connected to the outer sides of the upper splicing pipeline (1), the lower splicing pipeline (2) and the external connecting pipe (9), and an inner coating layer (10) is movably connected to the inner sides of the upper splicing pipeline (1), the lower splicing pipeline (2) and the external connecting pipe (9), and supporting cylinders (11) are fixedly connected in the inner coating layer (10).

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