Structural wall spiral welding steel pipe

Abstract

The utility model relates to a structural wall spiral welding steel pipe which comprises a pipe body, a flexible sheath and two fixing mechanisms used for fixing the flexible sheath on the pipe body, the flexible sheath is detachably sleeved on the outer side of the pipe body, the number of the fixing mechanisms is two, and the two fixing mechanisms are respectively located at two ends of the flexible sheath. The fixing mechanism comprises an inner pressing ring and an outer fixing sleeve, the inner pressing ring is arranged at the end of the flexible protective sleeve in a sleeving mode, one end of the outer fixing sleeve is pressed on the outer side of the inner pressing ring, a plurality of threaded holes are formed in the other end of the outer fixing sleeve, and screws used for being pressed on the outer side wall of the pipe body are arranged in the threaded holes. The flexible sheath is detachably sleeved on the outer side of the pipe body, so that the influence of mechanical damage and environmental factors on a welding seam can be effectively resisted, and the durability and the reliability of the welding seam are improved. The design of the inner pressing ring and the outer fixing sleeve ensures that the flexible sheath is firmly fixed on the steel pipe, and the stability and the sealing performance after installation are ensured.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe technology, and in particular to a spiral welded steel pipe with structural wall. Background Technology

[0002] Spiral welded steel pipes are widely used in various industries due to their advantages such as high length flexibility and wide size range. These pipes are manufactured by rolling steel plates or strips into a spiral shape and then welding them along the spiral. However, existing spiral welded steel pipes have some shortcomings: due to their manufacturing process, the weld seams of structural spiral welded steel pipes are relatively long. Although modern welding technology is very advanced, the long weld seams of spiral welded steel pipes can still become weak points. During transportation, installation, and daily use, the weld seams of spiral welded steel pipes may suffer mechanical damage due to external impacts, friction, etc., thereby weakening their structural integrity and safety. Furthermore, because the weld seams of spiral welded steel pipes are long-term exposed to the natural environment, especially harsh environments, they are susceptible to corrosion. Therefore, this application makes improvements to address the above-mentioned technical problems. Utility Model Content

[0003] This invention proposes a spiral welded steel pipe with a flexible sheath, which can effectively resist mechanical damage and environmental factors from affecting the weld, thus solving the aforementioned problems existing in the use of the prior art.

[0004] The technical solution of this utility model is implemented as follows: A spiral welded steel pipe with a structural wall includes a pipe body, a flexible sheath, and a fixing mechanism for fixing the flexible sheath to the pipe body. The flexible sheath is detachably sleeved on the outside of the pipe body. Two fixing mechanisms are provided and located at the two ends of the flexible sheath respectively. Each fixing mechanism includes an inner pressure ring and an outer fixing sleeve. The inner pressure ring is sleeved on the end of the flexible sheath. One end of the outer fixing sleeve is pressed against the outside of the inner pressure ring. The other end of the outer fixing sleeve is provided with a plurality of threaded holes, and screws for pressing against the outer wall of the pipe body are provided in the threaded holes.

[0005] Preferably, the end of the flexible sheath is provided with an annular groove, and one end of the inner pressure ring includes a bent portion that engages with the annular groove.

[0006] Preferably, the outer wall of the flexible sheath includes spiral protective protrusions.

[0007] Preferably, the tube body includes an inner tube, an outer tube, and a connecting reinforcing rib located between the inner tube and the outer tube. The inner tube is formed by spirally rolling and welding a first steel strip, and the outer tube is formed by spirally rolling and welding a second steel strip. The connecting reinforcing rib is spirally connected between the inner tube and the outer tube.

[0008] Preferably, the space between the inner tube and the outer tube is filled with sealant.

[0009] Preferably, an anti-corrosion lining is fixedly connected to the inner wall of the inner tube.

[0010] Preferably, both ends of the anti-corrosion liner are integrally formed with a fixed outer edge extending to the outer side wall end of the outer tube, and the fixed outer edge is pressed between the outer fixing sleeve and the outer tube.

[0011] In summary, the beneficial effects of this utility model are as follows:

[0012] 1. By using a flexible sheath fitted over the outside of the pipe body, the weld seam can be effectively protected against mechanical damage and environmental factors, improving its durability and reliability. The design of the inner pressure ring and the outer fixing sleeve ensures that the flexible sheath is firmly fixed to the steel pipe, guaranteeing stability and sealing after installation.

[0013] 2. The design of the annular groove and the curved part of the inner pressure ring enhances the connection strength between the end of the flexible sheath and the fixing mechanism, preventing the flexible sheath from slipping or shifting during use.

[0014] 3. The design of the inner and outer tubes, combined with the spiral connection reinforcement, greatly enhances the overall rigidity and compressive strength of the steel pipe, making it particularly suitable for high-pressure or long-span applications.

[0015] 4. The sealant not only enhances the seal between the inner and outer pipes but also effectively prevents external substances from entering the internal space, ensuring the cleanliness and safety of the piping system. The sealant also possesses a degree of elasticity, which can absorb vibrations and impacts from the outside environment to some extent, acting as a buffer and protecting the internal structure.

[0016] 5. The anti-corrosion lining is in direct contact with the conveyed medium, providing the first line of defense, significantly reducing the risk of internal weld corrosion, and extending the service life of the steel pipe.

[0017] 6. The fixed outer edge of the anti-corrosion lining is pressed between the outer fixed sleeve and the outer tube, ensuring that the anti-corrosion lining will not be displaced or fall off due to the pressure difference between the inside and outside or mechanical movement. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is the front view of the present invention;

[0021] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction;

[0022] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle;

[0023] Figure 5 This is an exploded view of the structure of this utility model.

[0024] In the diagram: 1. Pipe body; 11. Inner pipe; 111. First steel strip; 12. Outer pipe; 121. Second steel strip; 13. Connecting reinforcing rib; 2. Flexible sheath; 21. Annular groove; 22. Protective protrusion; 3. Inner pressure ring; 31. Bend; 4. Outer fixing sleeve; 41. Threaded hole; 5. Screw; 6. Sealant; 7. Corrosion-resistant inner lining; 71. Fixing outer edge. Detailed Implementation

[0025] The following will refer to the appendix in the embodiments of this utility model. Figure 1-5 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] Example:

[0027] like Figures 1 to 5As shown, this utility model discloses a spiral welded steel pipe with a structural wall, including a pipe body 1, a flexible sheath 2, and a fixing mechanism for fixing the flexible sheath 2 to the pipe body 1. The flexible sheath 2 is detachably sleeved on the outside of the pipe body 1. The flexible sheath 2 can be made of materials such as polyurethane, thermoplastic vulcanized rubber, or thermoplastic elastomer. Two fixing mechanisms are provided and located at both ends of the flexible sheath 2. Each fixing mechanism includes an inner pressure ring 3 and an outer fixing sleeve 4. The inner pressure ring 3 is sleeved on the end of the flexible sheath 2, and one end of the outer fixing sleeve 4 presses against the outside of the inner pressure ring 3. The other end of the outer fixing sleeve 4 is open... The device has several threaded holes 41, and screws 5 are provided in the threaded holes 41 for pressing against the outer wall of the pipe body 1. The screws 5 can press against the pipe body 1 to fix the outer fixing sleeve 4, thereby pressing against the inner pressure ring 3, so that the inner pressure ring 3 presses against the flexible sheath 2, which is firm and stable. This utility model can effectively resist the influence of mechanical damage and environmental factors on the weld by the flexible sheath 2 being sleeved on the outside of the pipe body 1, thereby improving the durability and reliability of the weld. In addition, since the flexible sheath 2 is detachable, it can be easily replaced or maintained when damaged or requiring repair, reducing the overall maintenance cost.

[0028] Furthermore, an annular groove 21 is provided at the end of the flexible sheath 2, and one end of the inner pressure ring 3 includes a bent part 31 that is inserted into the annular groove 21. This structure is simple and reliable, enhances the connection strength between the end of the flexible sheath 2 and the fixing mechanism, and prevents the flexible sheath 2 from slipping or shifting during use.

[0029] Among them, the outer wall of the flexible sheath 2 includes spiral protective protrusions 22, which improve the protective effect of the surface of the flexible sheath 2.

[0030] In this utility model, the pipe body 1 specifically includes an inner pipe 11, an outer pipe 12, and a connecting reinforcing rib 13 located between the inner pipe 11 and the outer pipe 12. The inner pipe 11 is formed by spirally rolling and welding a first steel strip 111, while the outer pipe 12 is formed by spirally rolling and welding a second steel strip 121. The connecting reinforcing rib 13 is spirally connected between the inner pipe 11 and the outer pipe 12. The design of the inner pipe 11 and the outer pipe 12, combined with the design of the spiral connecting reinforcing rib 13, greatly enhances the overall rigidity and compressive strength of the steel pipe, making it particularly suitable for high-pressure or large-span applications.

[0031] This utility model also fills the space between the inner tube 11 and the outer tube 12 with sealant 6. The sealant 6 can be polyurethane sealant 6, which can adapt to the thermal expansion and contraction of the pipe and maintain a long-term sealing effect.

[0032] In this utility model, a rubber anti-corrosion liner 7 is fixedly connected to the inner wall of the inner tube 11, which reduces the risk of internal weld corrosion and extends the service life of the steel pipe. Both ends of the anti-corrosion liner 7 are integrally formed with a fixed outer edge 71 extending to the outer wall end of the outer tube 12. The fixed outer edge 71 is pressed between the outer fixing sleeve 4 and the outer tube 12 and locked by screws 5, ensuring that the anti-corrosion liner 7 will not be displaced or fall off due to internal and external pressure difference or mechanical movement.

[0033] It should also be noted that the terms used in this utility model, such as "front", "rear", "vertical", "horizontal", 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. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A spiral welded steel pipe with a structural wall, characterized in that: The device includes a tube body, a flexible sheath, and a fixing mechanism for fixing the flexible sheath to the tube body. The flexible sheath is detachably fitted onto the outside of the tube body. There are two fixing mechanisms located at the two ends of the flexible sheath, and each fixing mechanism includes an inner pressure ring and an outer fixing sleeve. The inner pressure ring is fitted onto the end of the flexible sheath, and one end of the outer fixing sleeve is pressed against the outside of the inner pressure ring. The other end of the outer fixing sleeve has several threaded holes, and screws for pressing against the outer wall of the tube body are provided in the threaded holes.

2. The spiral welded steel pipe with structural wall according to claim 1, characterized in that: The flexible sheath has an annular groove at one end, and one end of the inner pressure ring includes a bent portion that fits into the annular groove.

3. The spiral welded steel pipe with structural wall according to claim 1, characterized in that: The outer wall of the flexible sheath includes spiral protective protrusions.

4. The spiral welded steel pipe with structural wall according to claim 1, characterized in that: The tube body includes an inner tube, an outer tube, and a connecting reinforcing rib located between the inner tube and the outer tube. The inner tube is formed by spirally rolling and welding a first steel strip, and the outer tube is formed by spirally rolling and welding a second steel strip. The connecting reinforcing rib is spirally connected between the inner tube and the outer tube.

5. A spiral welded steel pipe with a structural wall according to claim 4, characterized in that: The space between the inner tube and the outer tube is filled with sealant.

6. The spiral welded steel pipe with structural wall according to claim 4, characterized in that: The inner wall of the inner tube is fixedly connected with an anti-corrosion lining.

7. A spiral welded steel pipe with structural wall according to claim 6, characterized in that: Both ends of the anti-corrosion liner are integrally formed with a fixed outer edge extending to the outer side wall end of the outer tube, and the fixed outer edge is pressed between the outer fixed sleeve and the outer tube.

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