Stainless steel pipe with bend reinforcement

Abstract

The utility model relates to stainless steel pipe technical field discloses a stainless steel pipe with reinforcing structure of bending part, aims at solving the problem that the existing stainless steel pipe bending section is easy to deform and crack due to stress concentration, and the existing reinforcing scheme is poor in adhesion, difficult to disassemble and maintain and lacks durability. It comprises a stainless steel pipe body, a bending section provided on the body and a reinforcing part sleeved on the bending section. The reinforcing part comprises an arc-shaped outer protective plate and a movable sleeve ring. The outer protective plate is adapted to the outer wall of the bending section and integrally formed with two extension protective plate connecting ends at both ends. The movable sleeve ring is movably sleeved on the body. The inner wall of the movable sleeve ring is provided with a slot for inserting the protective plate connecting ends. The outer protective plate, the connecting ends and the sleeve ring are made of 304 or 316 stainless steel. The structure can effectively disperse the stress of the bending section, is convenient to disassemble and maintain, has strong durability and does not affect the basic function of the pipe body.

Description

Technical Field

[0001] This utility model relates to the field of stainless steel pipe technology, specifically to a stainless steel pipe with a reinforced structure at the bend. Background Technology

[0002] In practical applications such as industrial pipeline engineering, mechanical support, and civil water / gas supply, existing stainless steel pipes often require bends based on installation space and route requirements. However, due to the change in angle of the pipe structure, bends easily become stress concentration areas. When the stainless steel pipe is subjected to internal fluid pressure (such as the pressure when transporting water or gas), external extrusion forces (such as collisions with surrounding equipment or environmental pressure), or bending moments generated by suspended loads, the local stress in the bends will be much higher than that in the straight sections. After long-term use, this can easily lead to problems such as pipe deformation, weld cracking, or even pipe breakage, directly affecting the service life of the stainless steel pipe and potentially causing safety hazards such as fluid leaks.

[0003] Current industry solutions for reinforcing bent sections of stainless steel pipes have significant shortcomings:

[0004] Some reinforcement components (such as flat guard plates) have poor fit with the bending section, and gaps are easily generated between them. When external force is applied, "local impact" will be formed, which not only fails to effectively disperse stress, but may also aggravate the damage to the bending section.

[0005] Most reinforcement structures are fixed integrated designs, which are inconvenient to disassemble and adjust. If it is necessary to adapt to stainless steel pipes with different bending angles, or to maintain or replace the pipes later, the reinforcement structure needs to be disassembled as a whole, which is complicated and has low applicability.

[0006] Some of the reinforcement components are made of ordinary steel or low-grade stainless steel, which have insufficient corrosion resistance and structural strength. In humid environments (such as bathrooms or outdoors) or slightly acidic or alkaline environments (such as chemical auxiliary pipelines), they are prone to rust and deformation, which leads to the failure of the reinforcement function and cannot meet the requirements for long-term stable use.

[0007] The shortcomings of the existing technologies mentioned above make the reinforcement of the bent sections of stainless steel pipes a key pain point restricting their application stability, and there is an urgent need for a reinforcement structure that has high fit, is easy to assemble and disassemble, and is durable. Utility Model Content

[0008] The purpose of this utility model is to provide a stainless steel pipe with a reinforced structure at the bend, so as to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a stainless steel pipe with a bend reinforcement structure, comprising a stainless steel pipe body, a bend section disposed on the stainless steel pipe body, and a reinforcement component sleeved on the bend section;

[0010] The reinforcing component includes an arc-shaped outer protective plate and a movable collar. Both ends of the arc-shaped outer protective plate are provided with extended protective plate connecting ends. The arc-shaped outer protective plate is adapted to the bent section on the stainless steel pipe body and fits against the outer wall of the bent section. The movable collar is movably sleeved on the stainless steel pipe body and is connected to the protective plate connecting end by connecting bolts.

[0011] Preferably, the connecting bolt passes through the movable collar and is threaded to the connecting end of the guard plate.

[0012] Preferably, the inner wall of the movable collar has a matching slot corresponding to the connecting end of the guard plate, and the connecting end of the guard plate is movably inserted into the slot.

[0013] Preferably, the arc-shaped outer protective plate and the connecting end of the protective plate are integrally formed, and the materials of the arc-shaped outer protective plate, the connecting end of the protective plate, and the movable collar are all 304 stainless steel or 316 stainless steel.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] Effective reinforcement of the bend section: The arc-shaped outer protective plate fits and conforms to the bend section, and together with the movable collar and connecting bolts, it forms a rigid linkage, which can disperse the concentrated stress of the bend section to the straight pipe section, reducing the risk of deformation and cracking of the bend section;

[0016] High durability: The reinforcement is made of 304 or 316 stainless steel, which has excellent corrosion resistance and strength, can adapt to various working conditions, and extends the overall service life of the stainless steel pipe.

[0017] Good adaptability and maintainability: The movable collar can be flexibly adjusted in position, and the guard plate connection end is connected by slot + bolt, which is convenient for disassembly and assembly, can adapt to different bending scenarios, and facilitates later maintenance;

[0018] It does not affect the basic functions: the reinforcement structure only acts on the outer wall of the pipe, does not change the internal channels of the pipe, and does not interfere with the core functions such as fluid transportation. Attached Figure Description

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

[0020] Figure 2 This is a cross-sectional view of the present invention;

[0021] Figure 3 This is a schematic diagram of the arc-shaped outer protective plate in this utility model.

[0022] In the diagram: 1. Stainless steel pipe body; 11. Bending section; 2. Reinforcing component; 21. Arc-shaped outer protective plate; 22. Protective plate connecting end; 23. Movable collar; 24. Slot; 25. Connecting bolt. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-3 This utility model provides the following technical solution: a stainless steel pipe with a reinforced bend structure, comprising a stainless steel pipe body 1, a bend section 11 disposed on the stainless steel pipe body 1, and a reinforcement component 2 sleeved on the bend section; the reinforcement component 2 includes an arc-shaped outer protective plate 21 and a movable collar 23, both ends of the arc-shaped outer protective plate 21 are provided with extended protective plate connecting ends 22, the arc-shaped outer protective plate 21 is adapted to the bend section 11 on the stainless steel pipe body 1 and fits against the outer wall of the bend section 11, the movable collar 23 is movably sleeved on the stainless steel pipe body 1, and the movable collar 23 is connected to the protective plate connecting end 22 by a connecting bolt 25. The connecting bolt 25 passes through the movable collar 23 and is threadedly connected to the protective plate connecting end 22, facilitating the connection of the protective plate connecting end 22 and the movable collar 23. A corresponding slot 24 is provided on the inner wall of the movable collar 23 corresponding to the protective plate connecting end 22, and the protective plate connecting end 22 is movably inserted into the slot 24. The arc-shaped outer protective plate 21 and the protective plate connecting end 22 are integrally formed, and the materials of the arc-shaped outer protective plate 21, the protective plate connecting end 22 and the movable collar 23 are all 304 stainless steel or 316 stainless steel.

[0025] Specifically, the problem of deformation and cracking in the bending section (weak area of ​​stress concentration) of stainless steel pipes is solved by "targeted stress dispersion + rigid structural linkage". This can be explained in detail from three aspects: "structural matching logic, stress transmission path, and material protection mechanism".

[0026] Pre-adaptation and positioning logic of the core structure (basic guarantee)

[0027] Before the reinforcement function can be implemented, each component needs to be pre-positioned through precise structural design to lay the foundation for subsequent force transmission. The specific assembly method is as follows:

[0028] "Fit-fitting" positioning of the curved outer cladding

[0029] The curved outer protective plate 21 in the reinforcement adopts a curved structure that is "perfectly adapted" to the bent section 11 of the stainless steel pipe body 1 (the curvature is consistent with the outer wall of the bent section), and can fit tightly against the outer wall of the bent section 11 during installation. This design ensures that there is no gap between the curved outer protective plate and the bent section, which not only avoids the "local impact" caused by the gap when external force is applied, but also maximizes the contact area, preparing for the subsequent dispersion of surface stress of the bent section.

[0030] The protective plate connection end and the movable collar are linked by a "plug-in + fixation" mechanism.

[0031] Both ends of the arc-shaped outer protective plate 21 extend into protective plate connecting ends 22 (integrated with the outer protective plate, without splicing seams, to avoid breakage during force transmission). The inner wall of the movable collar 23, which fits the straight pipe section of the stainless steel pipe body 1, has a slot 24 that matches the size of the protective plate connecting ends 22. During installation, the protective plate connecting ends 22 can be precisely inserted into the slots 24 to achieve "preliminary positioning" of the arc-shaped outer protective plate and the movable collar, preventing relative misalignment between the two.

[0032] Subsequently, the connecting bolt 25 passes through the movable collar 23 and is threaded to the connecting end 22 of the guard plate, firmly fixing the two together. This dual connection method of "plug-in + bolt fastening" can eliminate looseness between components and ensure that the arc-shaped outer guard plate and the movable collar form a "rigid linkage whole", providing structural guarantee for the smooth transmission of force.

[0033] Stress transfer and stress dispersion paths (core reinforcement mechanism)

[0034] In the use of stainless steel pipes, the bending section 11 is a "weak area" where stress concentrates (external forces easily accumulate here, leading to deformation or cracking). The core function of the reinforcement is to "disperse the concentrated stress to a large area through a specific path." The specific transmission process is as follows:

[0035] Step 1: The curved outer protective plate bears the direct external force of the bending section.

[0036] When the stainless steel pipe bend 11 is subjected to external forces (such as fluid pressure, external extrusion, bending moment generated by suspension load, etc.), the arc-shaped outer protective plate 21, which is tightly attached to the outer wall of the bend, will first bear the external force. Since the outer protective plate covers the main stress surface of the bend, it can directly transform the "local concentrated force" into "uniform force on the entire outer protective plate", thus initially reducing the stress density on the surface of the bend.

[0037] Step 2: The force is transmitted from the connecting end of the guard plate to the movable collar.

[0038] The arc-shaped outer protective plate 21 and the connecting end 22 are integrally formed (without any weak points). After bearing external force, the outer protective plate will transmit the force "without loss" to the movable collar 23 fixed thereto through the connecting end. At this time, the design of the connecting end of the protective plate inserting into the slot 24 of the movable collar plays a key role - it can ensure the stability of the force transmission direction (avoiding force loss caused by lateral deviation), while the tightening effect of the bolts further enhances the efficiency of this force transmission and prevents the connection from detaching due to force.

[0039] Step 3: The movable collar distributes the force to the straight pipe section.

[0040] The movable collar 23 does not only cover the bent section, but is "movably fitted onto the straight section of the stainless steel pipe body 1" (its position can be adjusted during installation to accommodate different bending angles). When the movable collar receives the force from the end of the protective plate, it "distributes and transfers the force to a larger area of ​​the straight pipe section"—compared to the small area of ​​the bent section, the straight pipe section has a larger surface area and a more stable structure, which can "dilute" the stress originally concentrated in the bent section to the straight pipe area, ultimately achieving a complete dispersion path of "bent section stress → arc-shaped outer protective plate → movable collar → straight pipe section", fundamentally solving the problem of stress concentration in the bent section.

[0041] Material strength assurance mechanism (the underlying support for reinforcement effectiveness)

[0042] The reinforcement function relies not only on structural design but also on the material itself possessing sufficient strength and durability. The material of each reinforcement component is specified as 304 stainless steel or 316 stainless steel, and its working principle is as follows:

[0043] 304 stainless steel: It has excellent corrosion resistance (can adapt to humid and mildly acidic and alkaline environments) and medium strength (tensile strength ≥515MPa), which can ensure that the reinforcement will not be corroded or plastically deformed under normal working conditions and maintain rigidity for a long time.

[0044] 316 stainless steel: Based on 304, molybdenum has been added, resulting in better corrosion resistance (especially against seawater, strong acids and alkalis) and high-temperature strength. It is suitable for harsh environments (such as chemical pipelines and outdoor exposed pipelines) and prevents the reinforced structure from collapsing due to material failure.

[0045] The choice of two materials ensures that the curved outer protective plate, the protective plate connection end, and the movable collar can withstand external impacts and will not lose their reinforcement function due to breakage or deformation during force transmission, thus providing underlying support for the effectiveness of the entire reinforcement system.

[0046] This stainless steel pipe employs a closed-loop design that combines targeted coverage (arc-shaped outer protective plate) → rigid linkage (connecting end + collar + bolt) → wide-range dispersion (stress relief in straight pipe sections) + material assurance. This transforms the concentrated stress in the "weak area" of the bending section into uniform stress distribution across the entire reinforcement system and straight pipe sections. Ultimately, this enhances the stainless steel pipe's resistance to deformation and cracking, extending its service life. It is particularly suitable for stainless steel pipe applications that require frequent bending or bear certain loads (such as pipeline engineering and mechanical support structures).

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stainless steel pipe having a bend reinforcement structure, characterized by, It includes a stainless steel pipe body (1), a bent section (11) provided on the stainless steel pipe body (1), and a reinforcing member (2) sleeved on the bent section; The reinforcement component (2) includes an arc-shaped outer protective plate (21) and a movable collar (23). Both ends of the arc-shaped outer protective plate (21) are provided with extended protective plate connecting ends (22). The arc-shaped outer protective plate (21) is adapted to the bent section (11) on the stainless steel pipe body (1) and fits against the outer wall of the bent section (11). The movable collar (23) is movably sleeved on the stainless steel pipe body (1) and the movable collar (23) is connected to the protective plate connecting end (22) by connecting bolts (25).

2. The stainless steel pipe having a reinforcing structure at a bent portion according to claim 1, characterized in that: The connecting bolt (25) passes through the movable collar (23) and is threaded to the end (22) of the guard plate.

3. The stainless steel pipe having a reinforcing structure at a bent portion according to claim 1, characterized in that: The inner wall of the movable collar (23) is provided with a matching slot (24) corresponding to the guard plate connection end (22), and the guard plate connection end (22) is movably inserted into the slot (24).

4. The stainless steel pipe having a reinforcing structure at a bent portion according to claim 1, characterized in that: The arc-shaped outer protective plate (21) and the protective plate connecting end (22) are integrally formed, and the materials of the arc-shaped outer protective plate (21), the protective plate connecting end (22) and the movable collar (23) are all 304 stainless steel or 316 stainless steel.

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