Buried socket type steel pipe

Abstract

The utility model relates to the technical field of socket-and-spigot steel pipes, and discloses a buried socket-and-spigot steel pipe which comprises an outer steel pipe, side formworks are fixedly connected to the four sides of the outer wall of the outer steel pipe, pouring grooves are formed in the inner walls of the side formworks, a positioning ring is fixedly connected to the front end of the outer steel pipe, and positioning columns are fixedly connected to the four sides of the rear end of the positioning ring. An inner steel pipe is installed on the outer wall of the positioning column, a phenolic epoxy coating is connected to the outer wall of the inner steel pipe through a corrosion-resistant assembly, a polyurethane coating is arranged on the outermost layer of the outer steel pipe, a zinc coating is arranged on the inner side of the polyurethane coating, and sliding groove plates are connected to the four sides of the outer wall of the inner steel pipe through buffer assemblies. According to the utility model, the rubber block can be conveniently installed, the pipeline structure can be protected, the stress of a pipeline system can be reduced, the corrosion resistance effect can be improved, the service life of the pipeline can be obviously prolonged by improving the corrosion resistance, and the pipeline damage and replacement frequency caused by corrosion can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of socket steel pipes, in particular to a buried socket steel pipe. Background Technique

[0002] A buried socket steel pipe (also known as a socket pipe) is a type of pipe commonly used for underground water conveyance, gas conveyance, and oil conveyance. Its design feature is that the socket at the pipe end is connected to the spigot to form a stable joint.

[0003] After retrieval, a buried socket steel pipe with the publication number CN219413951U includes an outer pipe. A pipe mechanism for facilitating water supply and drainage is provided on the outer pipe. The pipe structure includes an inner pipe and a first rubber pad. The inner pipe is located on the inner side wall of the outer pipe. The number of the first rubber pads is at least two, and each first rubber pad is fixedly installed at the circumferential end of the inner pipe. At least two second rubber pads are fixedly installed on the inner side wall of each outer pipe. A connecting plate is fixedly installed at the lower end of each second rubber pad. At least two positioning shafts are fixedly installed at both ends of the outer pipe. Fixed rings are fixedly installed at both ends of the inner pipe. By setting the positioning shaft and matching the inner pipe with the cylindrical groove, the inner pipe can be conveniently positioned, preventing the position of the inner pipe from shifting relative to the outer pipe during long-term drainage, and ensuring the sealing performance between the outer pipe and the inner pipe.

[0004] Based on the above patent, by setting the first rubber pad, buffer rod, connecting plate and second rubber pad in cooperation, a good buffering effect can be achieved when the inner pipe is drained and impacted, avoiding the inner pipe from being directly stressed and severely worn, and prolonging the service life of the inner pipe. By setting the positioning shaft and matching the inner pipe with the cylindrical groove, the inner pipe can be conveniently positioned, preventing the position of the inner pipe from shifting relative to the outer pipe during long-term drainage, and ensuring the sealing performance between the outer pipe and the inner pipe. However, when using the rubber pad to support the outer pipe in this patent, due to the friction of the first rubber pad, it is inconvenient to install the inner pipe into the outer pipe after adjusting the first rubber pad, thus affecting the buffering effect of the outer pipe to avoid the impact force of the inner pipe. Content of the Utility Model

[0005] The purpose of the utility model is to solve the disadvantages existing in the prior art, and to propose a buried socket steel pipe, which is convenient to install rubber blocks, helps to protect the pipeline structure, reduces the stress on the pipeline system, improves the corrosion resistance effect, and the improvement of the corrosion resistance performance can significantly extend the service life of the pipeline and reduce the pipeline damage and replacement frequency caused by corrosion.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A buried socket steel pipe, comprising an outer steel pipe, wherein side formwork shells are fixedly connected to four sides of the outer wall of the outer steel pipe, perfusion grooves are formed in the inner walls of the side formwork shells, a positioning ring is fixedly connected to the front end of the outer steel pipe, positioning columns are fixedly connected to four sides of the rear end of the positioning ring, an inner steel pipe is installed on the outer walls of the positioning columns, a phenolic epoxy coating is connected to the outer wall of the inner steel pipe through a corrosion-resistant component, a polyurethane coating is arranged on the outermost layer of the outer steel pipe, a galvanized layer is arranged inside the polyurethane coating, and chute plates are connected to four sides of the outer wall of the inner steel pipe through buffer components.

[0008] Further, the buffer component includes adjusting bolts threadedly connected to the outer walls of the rear ends of the chute plates, a plurality of fixing plates are fixedly connected to the outer walls of the opposite ends of the chute plates, and slide plates are connected to the inner walls of the opposite ends of the chute plates through support groups.

[0009] Further, the corrosion-resistant component includes a cathode protection layer arranged inside the galvanized layer, a phenolic epoxy coating is arranged on the outermost layer of the inner steel pipe, a polyurea coating is arranged inside the phenolic epoxy coating, and a fluorocarbon coating is arranged inside the polyurea coating.

[0010] Further, the support group includes first connecting plates rotatably connected to the front ends of the slide plates, rubber blocks are rotatably connected to the front ends of the first connecting plates, and second connecting plates are rotatably connected to the front ends of the rubber blocks.

[0011] Further, the front ends of the adjusting bolts are rotatably connected to the rear ends of the rear slide plates, and the outer walls of the slide plates are slidably connected to the opposite ends of the fixing plates.

[0012] Further, the front ends of the second connecting plates are respectively rotatably connected to the rear ends of the slide plates and the outer walls of the front ends of the chute plates, and the opposite ends of the rubber blocks are in close contact with the inner wall of the outer steel pipe.

[0013] Further, the thickness diameter of the cathode protection layer is 10 mm, and the thickness diameter of the phenolic epoxy coating is 15 mm.

[0014] Further, the thickness diameters of both the phenolic epoxy coating and the polyurea coating are 10 mm, and the thickness diameter of the fluorocarbon coating is 20 mm.

[0015] The utility model has the following beneficial effects:

[0016] 1. In the utility model, through the combined use of the adjusting bolts, fixing plates, slide plates, first connecting plates, rubber blocks and second connecting plates, it is convenient to install the rubber blocks, which helps to protect the pipeline structure, reduce the stress on the pipeline system, and reduce the direct impact of these impacts on the pipeline, extend the service life of the pipeline, and help to maintain the stability and smooth operation of the pipeline system.

[0017] 2. In the present utility model, by using a combination of a polyurethane coating, a galvanized layer, a cathodic protection layer, a phenolic epoxy coating, a polyurea coating, and a fluorocarbon coating, the corrosion resistance effect is improved. The enhancement of the corrosion resistance performance can significantly extend the service life of the pipeline, reduce the pipeline damage and replacement frequency caused by corrosion, thereby reducing the long-term maintenance cost, and it is less likely to leak and rupture. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. 6 is a perspective view of a buried socket steel pipe proposed by the present utility model;

[0019] Figure 2 FIG. 7 is a half-sectional view of the outer steel pipe of a buried socket steel pipe proposed by the present utility model;

[0020] Figure 3 FIG. 8 is a sectional view of the chute plate of a buried socket steel pipe proposed by the present utility model;

[0021] Figure 4 FIG. 9 is a sectional view of the slide plate of a buried socket steel pipe proposed by the present utility model;

[0022] Figure 5 FIG. 10 is a half-sectional view of the inner steel pipe of a buried socket steel pipe proposed by the present utility model;

[0023] Figure 6 FIG. 11 is a half-sectional view of the phenolic epoxy coating of a buried socket steel pipe proposed by the present utility model.

[0024] LEGEND DESCRIPTION:

[0025] 1. Outer steel pipe; 2. Side formwork; 3. Positioning ring; 4. Positioning column; 5. Inner steel pipe; 6. Chute plate; 7. Adjusting bolt; 8. Fixed plate; 9. Pouring groove; 10. Slide plate; 11. First connecting plate; 12. Rubber block; 13. Second connecting plate; 14. Polyurethane coating; 15. Galvanized layer; 16. Cathodic protection layer; 17. Phenolic epoxy coating; 18. Polyurea coating; 19. Fluorocarbon coating. DETAILED IMPLEMENTATION MANNER

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] Refer to Figures 1-6, an embodiment provided by the present utility model: a buried socket steel pipe, including an outer steel pipe 1, side formwork shells 2 are fixedly connected to four sides of the outer wall of the outer steel pipe 1, perfusion grooves 9 are provided on the inner walls of the side formwork shells 2, a positioning ring 3 is fixedly connected to the front end of the outer steel pipe 1, positioning columns 4 are fixedly connected to four sides of the rear end of the positioning ring 3, an inner steel pipe 5 is installed on the outer wall of the positioning column 4, a phenolic epoxy coating 17 is connected to the outer wall of the inner steel pipe 5 through a corrosion-resistant component, a polyurethane coating 14 is provided on the outermost layer of the outer steel pipe 1, a galvanized layer 15 is provided inside the polyurethane coating 14, sliding groove plates 6 are connected to four sides of the outer wall of the inner steel pipe 5 through buffer components. When installing the inner steel pipe 5, the inner steel pipe 5 can be butted at the positioning column 4 connected to the positioning ring 3 of the outer steel pipe 1, so as to facilitate positioning the distance, and then pour cement into the perfusion groove 9 in the side formwork shell 2 to fix the pipeline.

[0028] Specifically:

[0029] Referring to Figures 2-4 , adjusting bolts 7 are threadedly connected to the outer walls of the rear ends of the sliding groove plates 6, a plurality of fixing plates 8 are fixedly connected to the outer walls of the opposite ends of the sliding groove plates 6, the inner walls of the opposite ends of the sliding groove plates 6 are connected to sliding plates 10 through support groups, the front ends of the sliding plates 10 are rotatably connected to first connecting plates 11, the front ends of the first connecting plates 11 are rotatably connected to rubber blocks 12, the front ends of the rubber blocks 12 are rotatably connected to second connecting plates 13. Rotate the adjusting bolt 7 to make the sliding plate 10 squeeze the first connecting plate 11, so that the first connecting plate 11 is connected by the sliding plate 10 inside the adjusting bolt 7 and the fixing plate 8 and cooperates with the rubber block 12 to squeeze the second connecting plate 13 to open to both sides, so that the rubber block 12 fixes the inside of the outer steel pipe 1, thus facilitating buffering the extrusion impact force of the rubber block 12 on the inside of the outer steel pipe 1. The front end of the adjusting bolt 7 is rotatably connected to the rear end of the rear sliding plate 10, the outer walls of the sliding plates 10 are slidably connected to the opposite ends of the fixing plates 8, the front ends of the second connecting plates 13 are respectively rotatably connected to the rear end of the sliding plate 10 and the outer wall of the front end of the sliding groove plate 6, and the opposite ends of the rubber blocks 12 are in close contact with the inner wall of the outer steel pipe 1, which is convenient for installing the rubber blocks 12, helps to protect the pipeline structure, reduces the stress on the pipeline system, and reduces the direct impact of these impacts on the pipeline, and prolongs the service life of the pipeline.

[0030] Specifically:

[0031] Referring to Figure 5 and Figure 6, a cathode protection layer 16 is provided inside the galvanized layer 15, a phenolic epoxy coating 17 is provided on the outermost layer of the inner steel pipe 5, a polyurea coating 18 is provided inside the phenolic epoxy coating 17, a fluorocarbon coating 19 is provided inside the polyurea coating 18. The thickness diameter of the cathode protection layer 16 is 10 mm, the thickness diameter of the phenolic epoxy coating 17 is 15 mm, the thickness diameters of both the phenolic epoxy coating 17 and the polyurea coating 18 are 10 mm, and the thickness diameter of the fluorocarbon coating 19 is 20 mm. The polyurethane coating 14 has excellent wear resistance. The galvanized layer 15 can form an anti-corrosion protection layer. The cathode protection layer 16 prevents corrosion by applying an electric current to the steel pipe to make it the cathode. The phenolic epoxy coating 17 has good adhesion and chemical resistance. The polyurea coating 18 has the effects of rapid curing, high strength, and chemical corrosion resistance. The fluorocarbon coating 19 has excellent weather resistance and UV resistance, improving the corrosion resistance inside the outer steel pipe 1 and the inner steel pipe 5. The improvement of corrosion resistance can significantly extend the service life of the pipeline, reduce pipeline damage and replacement frequency caused by corrosion, thereby reducing long-term maintenance costs, and being less likely to leak and rupture.

[0032] Working principle: When installing the inner steel pipe 5, the inner steel pipe 5 can be butted against the positioning column 4 connected to the positioning ring 3 of the outer steel pipe 1, thus facilitating the positioning distance. Then, cement is poured into the pouring groove 9 of the side formwork 2 to fix the pipeline. When the adjusting bolt 7 is rotated to make the sliding plate 10 squeeze the first connecting plate 11, the first connecting plate 11 is connected by the sliding plate 10 in the adjusting bolt 7 and the fixed plate 8 and cooperates with the rubber block 12 to squeeze the second connecting plate 13 to open to both sides, so that the rubber block 12 fixes the inside of the outer steel pipe 1, thus facilitating the buffering of the extrusion impact force of the rubber block 12 on the inside of the outer steel pipe 1, facilitating the installation of the rubber block 12, helping to protect the pipeline structure, reducing the stress on the pipeline system, and reducing the direct impact of these impacts on the pipeline, extending the service life of the pipeline. The polyurethane coating 14 has excellent wear resistance. The galvanized layer 15 can form an anti-corrosion protection layer. The cathode protection layer 16 prevents corrosion by applying an electric current to the steel pipe to make it the cathode. The phenolic epoxy coating 17 has good adhesion and chemical resistance. The polyurea coating 18 has the effects of rapid curing, high strength, and chemical corrosion resistance. The fluorocarbon coating 19 has excellent weather resistance and UV resistance, improving the corrosion resistance inside the outer steel pipe 1 and the inner steel pipe 5. The improvement of corrosion resistance can significantly extend the service life of the pipeline, reduce pipeline damage and replacement frequency caused by corrosion, thereby reducing long-term maintenance costs, and being less likely to leak and rupture.

[0033] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A buried socket-and-spigot steel pipe, comprising an outer steel pipe (1), characterized in that: The outer wall of the outer steel pipe (1) is fixedly connected to the side formwork (2) on four sides, and the inner wall of the side formwork (2) is provided with a pouring groove (9). The front end of the outer steel pipe (1) is fixedly connected to a positioning ring (3), and the rear end of the positioning ring (3) is fixedly connected to the four sides with positioning columns (4). The outer wall of the positioning column (4) is installed with an inner steel pipe (5), and the outer wall of the inner steel pipe (5) is connected to a phenolic epoxy coating (17) through a corrosion-resistant component. The outermost layer of the outer steel pipe (1) is provided with a polyurethane coating (14), and the inner side of the polyurethane coating (14) is provided with a galvanized layer (15). The outer wall of the inner steel pipe (5) is connected to a slide plate (6) on four sides through a buffer component.

2. The buried socket-and-spigot steel pipe according to claim 1, characterized in that: The buffer assembly comprises an adjusting bolt (7) threadedly connected to the outer wall at the rear end of the slide plate (6); the outer wall at the opposite end of the slide plate (6) is fixedly connected to a plurality of fixing plates (8); and the inner wall at the opposite end of the slide plate (6) is connected to a slide plate (10) via a support group.

3. The buried socket-and-spigot steel pipe according to claim 1, characterized in that: The corrosion-resistant component comprises a cathodic protection layer (16) disposed on the inner side of a galvanized layer (15); the outermost layer of the inner steel pipe (5) is provided with a phenolic epoxy coating (17); the inner side of the phenolic epoxy coating (17) is provided with a polyurea coating (18); and the inner side of the polyurea coating (18) is provided with a fluorocarbon coating (19).

4. The buried socket-and-spigot steel pipe according to claim 2, characterized in that: The support group comprises a first connecting plate (11) rotatably connected to the front end of the slide plate (10), the front end of the first connecting plate (11) is rotatably connected to a rubber block (12), and the front end of the rubber block (12) is rotatably connected to a second connecting plate (13).

5. The buried socket-and-spigot steel pipe according to claim 2, characterized in that: The front end of the adjusting bolt (7) is rotatably connected to the rear end of the rear slide plate (10), and the outer wall of the slide plate (10) is slidably connected to the opposite end of the fixing plate (8).

6. The buried socket-and-spigot steel pipe according to claim 4, characterized in that: The front end of the second connecting plate (13) is rotatably connected to the rear end of the slide plate (10) and the outer wall of the front end of the slide plate (6), and the opposite end of the rubber block (12) is tightly attached to the inner wall of the outer steel pipe (1).

7. The buried socket-and-spigot steel pipe according to claim 3, characterized in that: The cathode protection layer (16) has a thickness of 10 mm in diameter, and the phenolic epoxy coating (17) has a thickness of 15 mm in diameter.

8. The buried socket-and-spigot steel pipe according to claim 3, characterized in that: The phenolic epoxy coating (17) and the polyurea coating (18) are both 10 mm thick and 20 mm thick in diameter, and the fluorocarbon coating (19) is 20 mm thick and 20 mm in diameter.

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