Socket and spigot joint corrugated reinforced spiral steel pipe

Abstract

The utility model discloses a bell-and-spigot joint corrugated reinforced spiral steel pipe, which belongs to the technical field of pressure-bearing steel pipes and comprises a plurality of groups of base pipes, bell mouths and spigots, each base pipe comprises cement mortar, a steel cylinder and an anticorrosive coating which are sequentially arranged from inside to outside, reinforcing ribs are arranged on the steel cylinders, two ends of the steel cylinders are fixedly connected with the spigots or the bell mouths, and the bell mouths can be matched with the spigots. A plurality of U-shaped grooves are formed in the inserting opening, and T-shaped rubber rings are connected in the U-shaped grooves in a sleeved mode. The corrugated reinforced spiral steel pipe with the bell and spigot joint has the advantages of being high in strength, resistant to deformation, corrosion and durability, good in impermeability, convenient and fast to install, low in construction cost and maintenance cost and the like, and concrete is lined in the corrugated reinforced spiral steel pipe for corrosion prevention.

Description

Technical Field

[0001] This utility model belongs to the field of pressure-bearing steel pipe technology, specifically a corrugated reinforced spiral steel pipe with a socket joint. Background Technology

[0002] Pipeline transportation is a long-distance transport method for liquids and gases using pipelines as the transport vehicle. It boasts advantages such as large capacity, small land occupation, short construction period, low cost, high safety and reliability, strong continuity, low energy consumption, and high efficiency. Pipes are the main components of pipelines, ranging in length from 6 to 12 meters and diameter from 0.219 meters to 3 meters. Pipes are classified by material, including steel, cast iron, reinforced concrete, and non-metallic materials. Connection methods include socket joints, flange joints, welding, and bonding. Socket joints are the most convenient, quick, safe, and efficient pipe connection method. Currently, steel pipe socket joints are only suitable for cast iron and reinforced concrete pipes. The large diameter, length, wall thickness, and weight of steel pipes with socket joints result in greater force required for installation, and the installation equipment is also larger. Utility Model Content

[0003] The technical solution of this utility model is as follows: a corrugated reinforced spiral steel pipe with socket joint, comprising: multiple sets of base pipes, sockets and spigots, the base pipes comprising cement mortar, steel cylinder and anti-corrosion layer arranged sequentially from the inside to the outside, the steel cylinder is provided with reinforcing ribs, the two ends of the steel cylinder are fixedly connected to spigots or sockets, the sockets and spigots can match, the spigots are provided with multiple U-shaped grooves, and T-shaped rubber rings are sleeved in the U-shaped grooves.

[0004] Furthermore, a socket is fixedly connected to one end of the steel cylinder, and a socket is fixedly connected to the other end of the steel cylinder.

[0005] Furthermore, the two ends of the steel cylinder are fixedly connected to sockets, and the number of steel cylinders with fixed sockets and fixed connection sockets is the same.

[0006] Furthermore, the reinforcing ribs are spirally recessed along the cylindrical steel cylinder to form a corrugated outer wall.

[0007] Furthermore, the reinforcing ribs are single U-shaped.

[0008] Furthermore, the reinforcing ribs are double U-shaped.

[0009] Furthermore, there are two U-shaped grooves.

[0010] The beneficial effects of this utility model are as follows:

[0011] This utility model features high-strength steel pipes with low engineering and after-sales maintenance costs, excellent shear and seismic resistance, superior corrosion resistance, good impermeability, easier testing, reliable safety performance, convenient construction, and long service life. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the outer wall of the single U-shaped steel pipe of this utility model.

[0013] Figure 2 This is a schematic diagram of the outer wall of the double U-shaped steel pipe of this utility model.

[0014] Figure 3 for Figure 2 AA section view.

[0015] Figure 4 This is a schematic diagram of the three-dimensional structure of the steel pipe of this utility model.

[0016] In the picture:

[0017] 1. Anti-corrosion layer, 2. Steel cylinder, 201 reinforcing rib, 3. Socket, 4. T-shaped rubber ring, 5. Cement mortar, 6. Insert, 601 U-shaped groove. Detailed Implementation

[0018] It should be noted that in the description of this utility model, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation.

[0019] A type of corrugated reinforced spiral steel pipe with socket joint includes an anti-corrosion layer 1, a steel cylinder 2, a socket 3, a T-shaped rubber ring 4, cement mortar 5, and a spigot 6. The steel cylinder 2 is a steel pipe with corrugated reinforcing ribs rolled out. The inner lining is a cement mortar anti-corrosion layer 5. The corrugated reinforcing ribs 7 of the steel pipe protrude inward and are divided into two types: single U-shaped and double U-shaped.

[0020] The outer tube is a cylindrical steel pipe formed by spiral rolling and welding to form a spiral weld joint. The corrugated reinforcing rib 7, which is rolled out by steel plate, is spirally recessed along the cylindrical steel pipe to form a corrugated outer wall. The inner lining cement mortar 5 is bonded to the outer wall by high-speed centrifugation. The spigot 6 is rolled out with two U-shaped grooves 601 for placing sealing rings. The flange end of the spigot 6 is welded to the outer steel pipe of the base pipe. The small end of the trumpet-shaped socket 3 is welded to the steel cylinder.

[0021] The outer surface of the corrugated reinforced spiral steel pipe with socket joint is provided with an anti-corrosion layer 1.

[0022] The connection structure of the socket 3 and the spigot 6 is as follows: the spigot 6 of the first steel cylinder is inserted into the flared socket 3 of the second steel cylinder, and two T-shaped rubber rings 4 are placed in the U-shaped groove 601 of the spigot 6 of the first steel cylinder. The spigot 6 of the first steel cylinder is in sealed contact with the flared socket 3 of the second steel cylinder through the T-shaped rubber rings 4 thereon.

[0023] Reference Figures 1-2 This utility model discloses a corrugated reinforced spiral steel pipe with a socket joint. It includes a trumpet-shaped socket, a base pipe, and a spigot. The base pipe consists of an anti-corrosion layer 1, a steel cylinder 2, and cement mortar 5. The anti-corrosion layer 1 is applied by plastic coating, spraying epoxy resin paint, or a two-oil-one-cloth process. The steel cylinder 2 is a steel plate with rolled reinforcing ribs. The steel cylinder 2 and its reinforcing ribs 201 are connected to the inner lining concrete. The inner concrete adheres to the steel pipe and forms an integral part with the steel pipe. The reinforcing ribs 201 rolled from the steel plate are spirally recessed along the outer wall of the cylindrical steel pipe to form a concrete base pipe with a corrugated outer wall and a smooth inner wall. The spigot 6 is provided with two U-shaped grooves 601 for accommodating T-shaped rubber rings 4. One end is welded to the edge of the corrugated steel pipe. The small end of the trumpet-shaped socket 3 is welded to the base pipe.

[0024] The inner and outer surfaces of the 6-corrosion reinforced spiral steel pipe with socket joint are both provided with anti-corrosion layer 1.

[0025] T-shaped rubber ring 4 is a commercially available product based on existing technology.

[0026] The U-shaped or double U-shaped corrugated structure of the socket-joint corrugated reinforced spiral steel pipe can more effectively disperse and withstand internal and external pressure; at the same time, it increases the interface bonding area between cement mortar and the inner surface of the steel cylinder, and the overall strength is significantly improved.

[0027] Because the corrugated reinforced spiral steel pipe with socket joint adopts a corrugated reinforcement structure, the corrugations can significantly improve the pipe's resistance to radial buckling under radial external force, increasing the pipe's radial stability by approximately 2 times. Therefore, the wall thickness of the steel pipe can be reduced under the same external load. This reduces the amount of steel used while maintaining the same design strength, thereby lowering project costs and after-sales maintenance expenses.

[0028] Due to the special shape of the corrugated reinforced spiral steel pipe at the socket joint, it can reduce stress concentration caused by uneven settlement of the pipe foundation, has lower requirements for soil bearing capacity, has strong adaptability to soil layer changes, and has good shear resistance and seismic performance.

[0029] External corrosion protection uses epoxy resin paint or two-coat-one-cloth epoxy coal tar paint, etc.; internal corrosion protection uses a centrifugally coated cement mortar protective layer, using high-quality cement raw materials that have undergone strict testing. This ensures the mortar is firm, dense, smooth, adheres well to carbon steel surfaces, does not peel off, does not scale, and is of uniform thickness, guaranteeing meticulous protection for every inch of the pipe's interior.

[0030] The corrugated reinforced spiral steel pipe with socket joint adopts a double-seal T-ring socket connection method. The socket joint is produced by mold, and the overall pipeline working pressure is ≥1.6MPa; the test pressure is ≥2.1MPa. The socket joint has a self-positioning function during installation and the joint has good sealing performance. The double-seal rubber rings form two lines of defense. When one rubber ring fails to seal properly, the other rubber ring can still provide a seal, effectively preventing water leakage. At the same time, the first rubber ring can completely block various impurities in the water, so the second rubber ring only needs to serve as a backup seal. Under complex conditions such as pressure fluctuations and slight deformation of the pipeline, the double rubber rings can better adapt to and maintain sealing performance, reduce the risk of leakage, and ensure the impermeability of the pipe material.

[0031] The double sealing rings can be pressurized by drilling a hole to test the seal, allowing for timely detection and adjustment of sealing issues during installation. This avoids the need for rework due to problems discovered after installing a single sealing ring, improving construction efficiency and reducing pressure testing costs.

[0032] Corrugated reinforced spiral steel pipes with socket joints can withstand the risks of impact and load under buried conditions for a long time, and can also easily withstand the continuous reciprocating passage of trucks and heavy machinery. The contact pressure of the sealing ring increases with the increase of internal water pressure, resulting in better sealing performance and less leakage; it also has a certain range of angle deflection, which can adapt well to the settlement of the foundation and can withstand certain seismic environments.

[0033] The socket connection eliminates the need for welding during pipe laying, saving the work of digging trenches at corresponding locations on the foundation. No special foundation treatment is required, improving installation efficiency. It is minimally affected by rain or snow, and installers can perform the work after simple training. Soil backfilling and compaction are easily completed, making it suitable for longer pipelines.

[0034] Under suitable conditions, corrugated reinforced spiral steel pipes can have a service life of more than 50 years.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. A corrugated reinforced spiral steel pipe with a socket joint, characterized in that, include: Multiple sets of base pipes, sockets and spigots. The base pipes include cement mortar, steel cylinder and anti-corrosion layer arranged from the inside to the outside. The steel cylinder is equipped with reinforcing ribs. The two ends of the steel cylinder are fixedly connected to spigots or sockets. The sockets and spigots can match. The spigots are equipped with multiple U-shaped grooves. T-shaped rubber rings are fitted inside the U-shaped grooves.

2. The corrugated reinforced spiral steel pipe with socket joint according to claim 1, characterized in that, One end of the steel cylinder is fixedly connected to the spigot, and the other end of the steel cylinder is fixedly connected to the socket.

3. The corrugated reinforced spiral steel pipe with socket joint according to claim 1, characterized in that, The steel cylinder is fixedly connected to both ends with sockets, and the number of steel cylinders with fixed sockets and fixed joints is the same.

4. A corrugated reinforced spiral steel pipe with a socket joint according to claim 2 or 3, characterized in that, The reinforcing ribs are spirally recessed along the steel cylinder to form a corrugated outer wall.

5. A corrugated reinforced spiral steel pipe with a socket joint according to claim 4, characterized in that, The reinforcing rib is a single U-shape.

6. A corrugated reinforced spiral steel pipe with a socket joint according to claim 4, characterized in that, The reinforcing ribs are double U-shaped.

7. A corrugated reinforced spiral steel pipe with a socket joint according to claim 1, characterized in that, There are two U-shaped grooves.

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