High-pressure resistant flexible metal hose with multi-layer small-pitch shallow corrugated structure

Abstract

The present application relates to a high-pressure resistant flexible metal hose with a multi-layer small-pitch shallow corrugated structure, comprising a small-pitch shallow corrugated metal hose, transition joints, a braid, sleeve rings, spherical sealing joints, and outer sleeve nuts, wherein the small-pitch shallow corrugated metal hose is fixedly connected to the transition joints; each sleeve ring is used for fastening the braid, the small-pitch shallow corrugated metal hose and the transition joint; each outer sleeve nut is sleeved on the spherical sealing joint and fixedly connected to the transition joint; and the small-pitch shallow corrugated metal hose is multi-layered and has a closed annular corrugated shape. The corrugations of the small-pitch shallow corrugated metal hose are fitted together to achieve the function of a radial reinforcing ring, thus significantly improving the pressure resistance strength and fluid impact resistance of the metal hose. The present application solves both the problem of insufficient high-pressure resistance strength and the problem in respect of resistance to in-tube fluid impact in a corrugated tube, whilst also enabling the flexibility of the metal hose to be significantly improved, thereby solving the problem of the strength and flexibility of the metal hose restricting each other, making it impossible to improve both simultaneously.

Description

A multi-layer, small-wavelength, shallow-wave structure, high-pressure-resistant flexible metal hose Technical Field

[0001] The invention relates to the technical field of corrugated metal hoses, in particular to a multi-layer, small-pitch, shallow-wave structure, high-pressure-resistant flexible metal hose. Background Art

[0002] General-purpose metal hoses are typically manufactured from single-layer seamless tubes or welded strips. Their primary functions in piping systems include compensating for displacement and installation deviations, absorbing vibration, and reducing noise. To improve the hose's pressure resistance, the usual practice is to increase the wall thickness of the tube. This results in excessive rigidity, loss of flexibility, a larger bend radius, and a significant reduction in bending fatigue life. Consequently, it's difficult to simultaneously meet the required high-pressure, impact-resistant, and flexible properties of metal hoses.

[0003] Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the technical problem in the prior art that the metal hose has the characteristics of high pressure resistance, impact resistance, and good flexibility that are difficult to ensure at the same time.

[0005] The present invention provides a multi-layer, small-wavelength, shallow-wave structure, high-pressure-resistant flexible metal hose, comprising:

[0006] Small wave distance shallow wave metal hose, transition joint, spherical sealing joint and outer shell nut;

[0007] The small-pitch shallow-wave metal hose is a multi-layer structure and is fixedly connected to the transition joint; the spherical sealing joint is fixedly connected to the transition joint; the outer sleeve nut is sleeved on the spherical sealing joint for connection to the system pipeline.

[0008] Furthermore, the multi-layer small wave distance shallow wave structure high pressure resistant flexible metal hose includes:

[0009] Mesh sleeve and ring; the mesh sleeve is covered on the small-pitch shallow-wave metal hose, and the two ends of the mesh sleeve are fixedly connected to the transition joint for tightening the transition joint, and the ring is fixedly connected to the transition joint for tightening the small-pitch shallow-wave metal hose, the mesh sleeve and the transition joint.

[0010] Furthermore, the wall thickness of the tube blank of the small wave distance shallow wave metal hose is 0.1 to 0.4 mm.

[0011] Furthermore, the number of layers of the small-wave-distance shallow-wave metal hose is 2 to 4 layers.

[0012] Furthermore, the small-pitch and shallow-wave metal hose has a small-pitch and shallow-wave structure, with each wave close together and a corrugation shape being an Ω-shaped closed ring wave.

[0013] Furthermore, the mesh is a multi-layer steel wire mesh.

[0014] Furthermore, the diameter of the steel wire of the mesh is 0.2-0.4 mm.

[0015] Furthermore, the number of layers of the mesh is 2 to 3.

[0016] Furthermore, a 60° V-shaped groove is provided on the edge of one end of the transition joint, and the weld size is 1 to 2 times the total wall thickness of the small wave distance shallow wave metal hose weld. A positioning groove is provided on the inner diameter of the other end to match the spherical sealing joint.

[0017] Furthermore, the small-pitch shallow-wave metal hose is manufactured by using multi-layer seamless tube blanks or strip-welded tube blanks.

[0018] The beneficial effect of the present application is that the multi-layer small wave pitch shallow wave structure high-pressure resistant flexible metal hose mentioned in the present application includes: a small wave pitch shallow wave metal hose, a transition joint, a mesh sleeve, a ring, a spherical sealing joint and an outer sleeve nut; the small wave pitch shallow wave metal hose is fixedly connected to the transition joint; the ring is used to fasten the small wave pitch shallow wave metal hose, the mesh sleeve and the transition joint; the outer sleeve nut is sleeved on the spherical sealing joint and fixedly connected to the transition joint; the small wave pitch shallow wave metal hose is multi-layered, and the corrugation shape of the small wave pitch shallow wave metal hose is a closed ring wave.

[0019] Multi-layer, small-pitch, shallow-wave structured metal hoses address both the issue of bellows' insufficient high-pressure strength and their resistance to fluid impact within the tube. The corrugations of the bellows are U-shaped during primary forming, becoming Ω-shaped after secondary forming. The waves are close together, acting as radial reinforcement rings, significantly improving the hose's compressive strength and resistance to fluid impact. Furthermore, the metal bellows are manufactured from multi-layer, ultra-thin-walled tubes, significantly reducing their bending stiffness without compromising their compressive strength. The reshaped, small-pitch, shallow-wave structure further enhances their flexibility. Compared to conventional metal hoses, their compressive strength is increased by more than three times, and their bending fatigue life is increased by more than two times. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0021] FIG1 is a schematic diagram of the overall structure of a multi-layer, small-pitch, shallow-wave structure, high-pressure resistant flexible metal hose mentioned in the present invention;

[0022] FIG2 is a partial enlarged view of part a in FIG1 of a multi-layer, small-wavelength, shallow-wave structure, high-pressure-resistant flexible metal hose mentioned in the present invention;

[0023] FIG3 is a schematic diagram of a multi-layer, small-pitch, shallow-wave structure, high-pressure resistant flexible metal hose with a welded interface as mentioned in the present invention;

[0024] FIG4 is a schematic diagram of a multi-layer, small-wavelength, shallow-wave structure, high-pressure-resistant flexible metal hose for deep-sea operations without a mesh sleeve, as mentioned in the present invention.

[0025] Explanation of reference numerals: 101, outer sleeve nut; 102, spherical sealing joint; 103, transition joint; 104, small-pitch shallow-wave metal hose; 105, mesh sleeve; 106, collar. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0027] 1 , the present invention provides a multi-layer, small-pitch, shallow-wave structure, high-pressure-resistant flexible metal hose, characterized in that it includes:

[0028] It should be noted that the metal hose system consists of multiple components, including a small-pitch, shallow-corrugated metal hose 104, a transition joint 103, a spherical sealing joint 102, and an outer nut 101. These components work together to achieve functions such as sealing, connection, medium transfer, displacement compensation, and vibration and noise reduction. The small-pitch, shallow-corrugated metal hose 104 is fixedly connected to the transition joint 103, while the outer nut 101 is inserted into the spherical sealing joint 102 and fixedly connected to the transition joint 103.

[0029] The metal hose 104 is multi-layered and has a closed circular corrugation. The corrugation of the metal hose 104 is U-shaped during primary forming, but becomes Ω-shaped after secondary forming. The term "small-pitch, shallow-wave" refers to the close fit of two adjacent waves, which act as radial reinforcement rings.

[0030] Specifically, the low-pitch, shallow-corrugated metal hose 104 serves as the system's primary transmission component, responsible for withstanding pressure and transmitting media. In one feasible embodiment, the low-pitch, shallow-corrugated metal hose 104 is manufactured from a multi-layer seamless tube or a welded tube from a strip, providing a certain degree of flexibility and pressure resistance. The tube wall thickness of the low-pitch, shallow-corrugated metal hose 104 is 0.1 to 0.4 mm, and the number of layers is 2 to 4.

[0031] The metal hose 104 with a small wave pitch and shallow corrugation is fixedly connected to the transition joint 103, and the metal hose 104 and the transition joint 103 are welded together. For example, the ends of the metal hose 104 with a small wave pitch and shallow corrugation are welded to the transition joint 103, and the weld diameter of the corrugated tube at both ends matches the weld diameter of the transition joint 103. For example, the transition joint 103 is used to connect the metal hose to a piping system or other components. The combination of the transition joint 103, the spherical sealing joint 102, and the outer nut 101 typically has different thread or joint forms to ensure that the metal hose can be securely and tightly connected to the system.

[0032] In a feasible embodiment, the multi-layer small-pitch shallow-wave structure high-pressure resistant flexible metal hose includes: a mesh sleeve 105, the mesh sleeve 105 is covered on the small-pitch shallow-wave metal hose 104, and the two ends of the mesh sleeve 105 are respectively fixedly connected to the transition joint 103 for fastening the transition joint 103. Referring to Figure 2, Figure 2 is a partial enlarged view of the mesh sleeve welding. For example, the small-pitch shallow-wave metal hose 104 is covered with 2 to 3 layers of mesh sleeves 105. The mesh sleeve 105 is a steel wire mesh sleeve with a wire diameter of 0.2 to 0.4 mm. The mesh sleeve is clamped to the hose transition joint 103 through a ring 106 and welded together. The mesh sleeve 105 is used to cover the outside of the small-pitch shallow-wave metal hose 104 to provide additional protection and safeguard to prevent the small-pitch shallow-wave metal hose 104 from being damaged by the internal high pressure and the external environment.

[0033] In a feasible embodiment, the small-pitch shallow-wave metal hose 104 is fixedly welded to the transition joint 103, which is welded to the spherical sealing joint 102. The outer nut 101 is used to lock the connection to the system pipeline; the collar 106 is used to fasten the small-pitch shallow-wave metal hose 104, the mesh sleeve 105, and the transition joint 103. For example, the ends of the small-pitch shallow-wave metal hose 104 and the mesh sleeve 105 are clamped at the transition joint 103 by the collar 106, and the mesh sleeve 105 is welded to the transition joint 103 and the collar 106.

[0034] The other end of transition joint 103 is welded to spherical sealing joint 102, which is connected, locked, and sealed to the system pipeline via outer nut 101. Spherical sealing joint 102 is used to provide a spherical sealing structure at the end of the small-pitch, shallow-corrugated metal hose 104, allowing the small-pitch, shallow-corrugated metal hose 104 to have a certain degree of angular adjustment capability in multiple directions while maintaining a seal.

[0035] Exemplarily, the weld size of the transition joint 103 is 1 to 2 times the total wall thickness of the weld of the small-wavelength shallow-wavelength metal hose 104 .

[0036] The above components collaborate to form the complete structure of a multi-layer, small-wavelength, shallow-wave structure, high-pressure resistant flexible metal hose, realizing functions such as transmitting medium, bearing pressure, displacement compensation, vibration reduction and noise reduction, protection and sealing.

[0037] In one feasible embodiment, the edge of one end of the transition joint 103 is provided with a 60° V-shaped groove, and the inner diameter of the other end is provided with a positioning groove corresponding to the spherical sealing joint 102. The interface of the small-pitch shallow-corrugated metal hose 104 can be designed as a welded structure, directly welded to the system pipeline during installation, as shown in Figure 3, to ensure pressure resistance and sealing.

[0038] For example, when the small wave distance shallow wave metal hose 104 is applied to deep sea operation external pressure conditions, it can be designed into a mesh-free structure, as shown in FIG4 .

[0039] The present invention is further described in detail below with reference to specific embodiments.

[0040] As shown in Figures 1, 2, 3, and 4, the small-pitch, shallow-corrugated metal hose 104 is manufactured from an extremely thin-walled, multi-layer seamless tube or strip-welded tube. The corrugations are closed ring-shaped, with a wall thickness of 0.1 to 0.4 mm and 2 to 4 layers. The corrugations are U-shaped during primary forming, but become Ω-shaped after secondary forming. The waves are close together, acting as radial reinforcement rings.

[0041] As shown in FIG1-4 , the interface form at both ends of the small-pitch shallow-wave metal hose 104 is incision at the wave crest, and the size of the formed interface is consistent with the outer diameter of the weld of the transition joint 103 .

[0042] As shown in FIG1-4 , both ends of the small-pitch shallow-wave metal hose 104 are welded together with the transition joint 103 .

[0043] As shown in FIG1-3 , the metal mesh sleeve 105 covering the small-wavelength shallow-wave metal hose 104 is a 2-3 layer steel wire mesh sleeve with a wire diameter of 0.2-0.4 mm, and each layer is tightly fitted together.

[0044] As shown in FIG1-3 , both ends of the mesh sleeve are clamped at the transition joint 103 with collars 106 , and the mesh sleeve 106 , the transition joint 103 and the collars 106 are welded together.

[0045] As shown in FIG1 , FIG2 and FIG4 , after the outer nut 101 is put on the spherical sealing joint 102 , it is welded with the hose transition joint 103 , which is suitable for the installation structure of the pipeline system with spherical sealing.

[0046] As shown in FIG3 , the transition joint 103 of the hose is a welded structure, which is suitable for installation structures in which the pipeline system is a welded and sealed structure.

[0047] Using this implementation plan, three specifications of metal hoses, DN15, DN25, and DN32, with lengths of L300 to 3000 mm, were developed. They can be stably applied to 40 MPa internal and external pressure conditions. At the same time, the flexibility and impact resistance indicators of the hoses meet the use requirements.

[0048] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

[0049] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0050] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0051] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0052] In the description of this specification, the terms "one embodiment", "some embodiments", "embodiments", "examples", "specific examples" or "some examples" refer to the specific features, structures, materials or characteristics described in conjunction with the embodiment or example and included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and features of different embodiments or examples, unless they are mutually inconsistent.

[0053] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A multi-layer, small-pitch, shallow-wave structure, high-pressure resistant flexible metal hose, characterized in that: include: Small-pitch shallow-wave metal hoses, transition joints, spherical seal joints and jacket nuts; The small-pitch shallow-wave metal hose is a multi-layer structure and is fixedly connected to the transition joint; the spherical sealing joint is fixedly connected to the transition joint; the outer sleeve nut is sleeved on the spherical sealing joint for connecting to the system pipeline.

2. The multi-layer, small-pitch, shallow-wave structure, high-pressure resistant flexible metal hose according to claim 1, characterized in that: include: Nets and loops; The mesh sleeve is covered on the small-pitch shallow-wave metal hose, and both ends of the mesh sleeve are respectively fixedly connected to the transition joint for fastening the transition joint; The collar is fixedly connected to the transition joint and is used to fasten the small-pitch shallow-wave metal hose, the mesh sleeve and the transition joint.

3. The multi-layer, small-pitch, shallow-wave structure, high-pressure resistant flexible metal hose according to claim 1, characterized in that: The wall thickness of the tube blank of the small wave distance shallow wave metal hose is 0.1-0.4mm.

4. The multi-layer, small-pitch, shallow-wave structure, high-pressure resistant flexible metal hose according to claim 1, characterized in that: The number of layers of the small wave distance shallow wave metal hose is 2 to 4 layers.

5. The multi-layer, small-pitch, shallow-wave structure, high-pressure resistant flexible metal hose according to claim 1, characterized in that: The small wave pitch shallow wave metal hose is a small wave pitch shallow wave structure, each wave is close together, and the corrugation shape is an Ω-shaped closed ring wave.

6. A multi-layer, small-pitch, shallow-wave structure, high-pressure resistant flexible metal hose according to claim 2, characterized in that: The mesh sleeve is a multi-layer steel wire mesh sleeve.

7. The multi-layer, small-pitch, shallow-wave structure, high-pressure resistant flexible metal hose according to claim 6, characterized in that: The steel wire diameter of the mesh sleeve is 0.2-0.4 mm.

8. The multi-layer, small-pitch, shallow-wave structure, high-pressure resistant flexible metal hose according to claim 6, characterized in that: The number of layers of the net sleeve is 2 to 3.

9. The multi-layer, small-pitch, shallow-wave structure, high-pressure resistant flexible metal hose according to claim 1, characterized in that: A 60° V-shaped groove is provided at the edge of one end of the transition joint, and the weld size is 1 to 2 times the total wall thickness of the small-wave-pitch shallow-wave metal hose weld. A positioning groove is provided on the inner diameter of the other end to match the spherical sealing joint.

10. The multi-layer, small-pitch, shallow-wave structure, high-pressure resistant flexible metal hose according to claim 1, characterized in that: The small-pitch shallow-wave metal hose is manufactured by adopting multi-layer seamless tube blanks or strip-welded tube blanks.

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