Reinforced spiral steel pipe

Abstract

The utility model relates to the technical field of spiral steel pipes, and discloses a reinforced spiral steel pipe which comprises a first spiral steel pipe and a second spiral steel pipe, the outer wall of the first spiral steel pipe and the outer wall of the second spiral steel pipe are both coated with reinforcing layers, the inner wall of the first spiral steel pipe and the inner wall of the second spiral steel pipe are both coated with compression-resistant layers, and the compression-resistant layers are arranged on the outer walls of the first spiral steel pipe and the second spiral steel pipe. A first flange and a second flange are fixed to the two ends of the first spiral steel pipe and the two ends of the second spiral steel pipe respectively, and the first flange and the second flange are detachably connected. According to the utility model, the screw rod is inserted into the clamping notch by rotating the sleeve, and then the nut is tightened, so that the screw rod generates pulling force on the two flanges along with tightening of the nut, and the two flanges are tightly attached together. And through the matching design of the clamping notches and the screws and the matching design of the abutting grooves and the nuts, the flange can be effectively prevented from generating relative displacement or loosening due to external force in the pipeline operation process, and the stability and reliability of pipeline connection are ensured.

Description

Technical Field

[0001] This utility model relates to the field of spiral steel pipe technology, specifically a reinforced spiral steel pipe. Background Technology

[0002] Spiral welded steel pipe is a type of spiral welded steel pipe made from reinforced steel coils as raw materials, formed by cold extrusion, and welded using an automatic double-wire double-sided submerged arc welding process. The process involves feeding the steel strip into a welding unit, where it is rolled by multiple rollers, gradually forming a circular tube blank with an open gap. The pressure of the extrusion rollers is adjusted to control the weld gap to 1–3 mm, ensuring that both ends of the weld are flush.

[0003] In the prior art, such as the reinforced spiral steel pipe with application number CN202321608375.7, the aforementioned patent proposes to set an installation ring, an adjusting ring, a sliding groove, an opening, a locking hole, and an elastic locking rod, so that the device can quickly fix and connect multiple spiral steel pipes through a locking mechanism, thereby greatly accelerating the connection efficiency of multiple spiral steel pipes. However, in actual use, especially under complex working conditions such as bearing large tensile force, pressure, or vibration, the steel pipe connection parts may loosen due to long-term stress, resulting in sealing failure at the connection or a decrease in the overall structural integrity, affecting the normal operation and safety of the pipeline.

[0004] Therefore, we propose a reinforced spiral steel pipe to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this utility model is to provide a reinforced spiral steel pipe to solve the problem of easy loosening of spiral pipe connections in the prior art mentioned in the background.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A reinforced spiral steel pipe includes a first spiral steel pipe and a second spiral steel pipe. The outer walls of both the first spiral steel pipe and the second spiral steel pipe are coated with a reinforcing layer, and the inner walls of both the first spiral steel pipe and the second spiral steel pipe are coated with a pressure-resistant layer. A first flange and a second flange are fixed to the two ends of the first spiral steel pipe and the second spiral steel pipe, respectively, and the first flange and the second flange are detachably connected.

[0008] Also includes:

[0009] A reinforcement assembly that facilitates the reinforcement of the connection between the first flange and the second flange;

[0010] A sealing assembly that facilitates increasing the sealing performance of the connection between the first flange and the second flange.

[0011] Preferably, the reinforcing layer is composed of hot-dip galvanized and polypropylene materials.

[0012] Preferably, the compression-resistant layer is composed of steel-plastic composite material and high-density polyethylene material.

[0013] Preferably, the reinforcement component includes:

[0014] A snap-fit ​​groove is symmetrically formed on the first flange;

[0015] Abutment groove, wherein the abutment groove is symmetrically formed on the outer surface of the first flange;

[0016] A notch is formed on the second flange;

[0017] A fixing rod, wherein the fixing rod is fixed within the recess;

[0018] A sleeve, which is rotatably fitted onto the fixed rod;

[0019] The screw is fixed to the sleeve;

[0020] A nut, which is threaded onto the screw.

[0021] Preferably, the screw engages with the locking slot, the outer contour of the screw matches the inner contour of the locking slot, and the nut engages with the abutment groove.

[0022] Preferably, the sealing assembly includes:

[0023] A sealing groove is formed on the outer surface of the first flange;

[0024] A sealing ring is fixedly connected to the outer surface of the second flange;

[0025] The sealing ring engages with the sealing groove, and the shape of the sealing ring matches that of the sealing groove.

[0026] Compared with the prior art, the beneficial effects of this utility model are:

[0027] 1. This utility model aligns the first and second flanges, inserts the threaded rod into the snap-fit ​​groove by rotating the sleeve, and then tightens the nut to quickly complete the connection. Compared with the traditional welding connection method, it greatly saves installation time and labor costs, and significantly improves construction efficiency. Simultaneously, as the nut is tightened, the threaded rod exerts tension on the two flanges, ensuring they fit tightly together. The design of the snap-fit ​​groove and threaded rod, and the mating groove and nut, effectively prevents the flanges from relative displacement or loosening due to external forces during pipeline operation, ensuring the stability and reliability of the pipeline connection, reducing the risk of pipeline leakage and failure, and guaranteeing the long-term stable operation of the entire pipeline system.

[0028] 2. This utility model further enhances the protective performance and mechanical strength of the outer wall of the steel pipe through the reinforcing layer, enabling it to withstand greater external forces and harsh environments. The pressure-resistant layer increases the high strength, rigidity, chemical corrosion resistance, wear resistance and flexibility of the spiral steel pipe, ensuring that the steel pipe will not deform or break under high pressure. It protects the steel from internal media corrosion and buffers internal pressure impact, effectively improving the pressure resistance and service life of the steel pipe. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the overall cross-sectional three-dimensional structure of this utility model;

[0031] Figure 3 This is a three-dimensional structural diagram of the first and second spiral steel pipes of this utility model in their separated states.

[0032] Figure 4 This is a three-dimensional structural diagram of the reinforcement component of this utility model.

[0033] In the picture:

[0034] 1. First spiral steel pipe; 2. Second spiral steel pipe; 3. Reinforcing layer; 4. Pressure-resistant layer; 5. First flange; 51. Snap-fit ​​groove; 52. Abutment groove; 501. Sealing groove; 6. Second flange; 61. Notch; 62. Fixing rod; 63. Sleeve; 64. Threaded rod; 65. Nut; 601. Sealing ring. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] Example 1: Please refer to Figures 1-4 ,

[0037] In this embodiment, a reinforced spiral steel pipe includes a first spiral steel pipe 1 and a second spiral steel pipe 2. The outer walls of both the first spiral steel pipe 1 and the second spiral steel pipe 2 are coated with a reinforcing layer 3. The reinforcing layer 3 is composed of hot-dip galvanized steel and polypropylene materials. The coating formed by the hot-dip galvanized material can form a dense metal protective film on the surface of the steel pipe, effectively preventing the steel pipe from being corroded by oxygen, moisture, corrosive substances, etc., in the external environment, thus improving the corrosion resistance of the steel pipe. The polypropylene material has good wear resistance, chemical corrosion resistance, and a certain mechanical strength. Combined with the hot-dip galvanized layer, it further enhances the protective performance and mechanical strength of the outer wall of the steel pipe, enabling the spiral steel pipe to withstand greater external forces and the effects of harsh environments.

[0038] The inner walls of both the first spiral steel pipe 1 and the second spiral steel pipe 2 are coated with a pressure-resistant layer 4, which is composed of steel-plastic composite material and high-density polyethylene material. The steel portion of the steel-plastic composite material provides high strength and rigidity, capable of withstanding the pressure of the internal transported medium, ensuring that the steel pipe does not deform or rupture under high pressure. The high-density polyethylene material has good chemical corrosion resistance, wear resistance, and flexibility. On the one hand, it protects the steel from corrosion by the internal medium; on the other hand, it can buffer the impact of internal pressure to a certain extent, improving the pressure resistance and service life of the steel pipe.

[0039] The first spiral steel pipe 1 and the second spiral steel pipe 2 are respectively fixed with a first flange 5 and a second flange 6 at both ends, and the first flange 5 and the second flange 6 are detachably connected.

[0040] Example 2: This example is an improvement upon Example 1. For details, please refer to [link / reference]. Figures 2-4A reinforced spiral steel pipe also includes a reinforcing component, which facilitates the connection and reinforcement of the first flange 5 and the second flange 6. The reinforcing component includes a snap-fit ​​groove 51, an abutment groove 52, a recess 61, a fixing rod 62, a sleeve 63, a screw 64, and a nut 65. The snap-fit ​​groove 51 is symmetrically opened on the first flange 5, the abutment groove 52 is symmetrically opened on the outer surface of the first flange 5, the recess 61 is opened on the second flange 6, the fixing rod 62 is fixed in the recess 61, the sleeve 63 is rotatably sleeved on the fixing rod 62, the screw 64 is fixed on the sleeve 63, and the nut 65 is threadedly connected to the screw 64. The screw 64 snaps into the snap-fit ​​groove 51, the outer contour of the screw 64 matches the inner contour of the snap-fit ​​groove 51, and the nut 65 snaps into the abutment groove 52.

[0041] The reinforcement components significantly enhance the stability of the connection between the first flange 5 and the second flange 6. The synergistic effect of the snap-fit ​​groove 51, abutment groove 52, notch 61, fixing rod 62, sleeve 63, threaded rod 64, and nut 65 allows the two flanges to withstand greater external forces and pressures after connection. When the spiral steel pipe is subjected to external forces such as axial tension, pressure, or vibration, the snap-fit ​​between the threaded rod 64 and the snap-fit ​​groove 51, and the snap-fit ​​between the nut 65 and the abutment groove 52, effectively prevent relative displacement or loosening between the flanges, ensuring the stable operation of the pipeline system and reducing the risk of leakage or pipeline damage due to loose connections.

[0042] The first spiral steel pipe 1 and the second spiral steel pipe 2 are detachably connected via the first flange 5 and the second flange 6. During installation, no complex welding or other permanent connection operations are required; simply align the flanges and secure them. This significantly reduces installation difficulty, shortens installation time, and improves construction efficiency. When the spiral steel pipe experiences localized damage or requires internal repair, the detachable flange connection allows for easy separation of the two pipe sections, facilitating repair, replacement, or inspection of specific parts, thus reducing maintenance costs and complexity.

[0043] Example 2: This example is an improvement upon Example 1. For details, please refer to [link / reference]. Figures 2-4 A reinforced spiral steel pipe also includes a sealing assembly, which facilitates increasing the sealing performance of the connection between the first flange 5 and the second flange 6. The sealing assembly includes a sealing groove 501 and a sealing ring 601. The sealing groove 501 is formed on the outer surface of the first flange 5, and the sealing ring 601 is fixedly connected to the outer surface of the second flange 6. The sealing ring 601 is snapped into the sealing groove 501, and the shape of the sealing ring 601 matches that of the sealing groove 501.

[0044] The design of the sealing groove 501 and the sealing ring 601 effectively increases the sealing performance of the connection between the first flange 5 and the second flange 6, reliably preventing leakage of internally transported liquids, gases, and other media from the flange connection. The sealing ring 601 and the sealing groove 501 are perfectly matched in shape and fit tightly together, fully filling the tiny gaps between the flanges to form an effective sealing barrier. This is particularly important for pipeline systems transporting flammable, explosive, toxic, harmful, or corrosive media, ensuring production safety and environmental safety, and preventing economic losses and safety accidents caused by leaks.

[0045] Working principle:

[0046] The first spiral steel pipe 1 and the second spiral steel pipe 2 are connected via a first flange 5 and a second flange 6 at their respective ends. During connection, the first flange 5 and the second flange 6 are aligned so that the snap-fit ​​groove 51 on the first flange 5 corresponds to the fixing rod 62, sleeve 63, screw 64, and other components on the second flange 6. Then, rotating the sleeve 63 drives the screw 64 to rotate and insert it into the snap-fit ​​groove 51. After the screw 64 is fully inserted into the snap-fit ​​groove 51, the nut 65 is screwed onto the screw 64 and gradually tightened until it engages with the abutment groove 52. As the nut 65 is tightened, the screw 64 exerts a tensile force on the first flange 5 and the second flange 6, thereby tightly connecting the two flanges and achieving the connection between the first spiral steel pipe 1 and the second spiral steel pipe 2.

[0047] The sealing assembly functions simultaneously with the connection of the first flange 5 and the second flange 6. When the two flanges approach and connect, the sealing ring 601 embeds itself into the sealing groove 501, forming a sealing structure. The elasticity of the sealing ring 601 fills the gap between the flanges, preventing external liquids, gases, and other media from leaking from the flange connection, increasing the sealing performance of the connection between the first flange 5 and the second flange 6, and ensuring the safety and sealing of the medium transported inside the spiral steel pipe.

[0048] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0049] Although the present invention 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 make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A reinforced spiral steel pipe, comprising a first spiral steel pipe (1) and a second spiral steel pipe (2), characterized in that: The outer walls of the first spiral steel pipe (1) and the second spiral steel pipe (2) are coated with a reinforcing layer (3), and the inner walls of the first spiral steel pipe (1) and the second spiral steel pipe (2) are coated with a pressure-resistant layer (4). The first flange (5) and the second flange (6) are fixed at both ends of the first spiral steel pipe (1) and the second spiral steel pipe (2), respectively. The first flange (5) and the second flange (6) are detachably connected. Also includes: A reinforcement assembly that facilitates the reinforcement of the connection between the first flange (5) and the second flange (6); A sealing assembly that facilitates increasing the sealing performance of the connection between the first flange (5) and the second flange (6).

2. The reinforced spiral steel pipe according to claim 1, characterized in that: The reinforcing layer (3) is composed of hot-dip galvanized and polypropylene materials.

3. The reinforced spiral steel pipe according to claim 2, characterized in that: The compressive layer (4) is composed of steel-plastic composite material and high-density polyethylene material.

4. The reinforced spiral steel pipe according to claim 1, characterized in that: The reinforcement components include: The snap-fit ​​slots (51) are symmetrically opened on the first flange (5); Abutment groove (52) is symmetrically formed on the outer surface of the first flange (5); A notch (61) is formed on the second flange (6); A fixing rod (62) is fixed inside the recess (61); Sleeve (63), which is rotatably sleeved on the fixed rod (62); Screw (64), the screw (64) being fixed to the sleeve (63); Nut (65), which is threaded onto the screw (64).

5. A reinforced spiral steel pipe according to claim 4, characterized in that: The screw (64) engages with the snap-fit ​​groove (51), the outer contour of the screw (64) matches the inner contour of the snap-fit ​​groove (51), and the nut (65) engages with the abutment groove (52).

6. The reinforced spiral steel pipe according to claim 1, characterized in that: The sealing assembly includes: A sealing groove (501) is formed on the outer surface of the first flange (5); A sealing ring (601) is fixedly connected to the outer surface of the second flange (6); The sealing ring (601) engages with the sealing groove (501), and the shape of the sealing ring (601) matches that of the sealing groove (501).

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