Hose assembly

Abstract

The invention belongs to the technical field of hoses, and particularly relates to a hose assembly which comprises an inner pipe, a metal hose, first connectors, a pressing ring and a second connector, the metal hose is arranged on the inner pipe in a sleeving mode, the first connectors are arranged at the two ends of the inner pipe and abut against the ends of the inner pipe, and the first connectors are hollow and are provided with inserting parts; the inserting part extends into the inner pipe and is in limiting connection with the inner pipe through a limiting structure, the pressing rings are buckled and pressed at the two ends of the inner pipe, so that the inserting part is tightly connected with the inner pipe, second connectors are welded to the two ends of the metal hose, and the second connectors are arranged on the first connectors in a sleeving mode and welded to the first connectors; and metal woven meshes are wound on the outer side wall of the inner pipe and the outer side wall of the metal hose. The inner pipe and the first connector are fastened through the limiting structure and the pressing ring, the connecting tightness is ensured, the inner pipe and the first connector are effectively prevented from loosening or falling off, and therefore the sealing effect of the connecting position and restraining and strengthening of the metal woven mesh are enhanced, and the high-pressure working condition requirement can be met.

Description

Technical Field

[0001] This invention belongs to the field of hose technology, and particularly relates to a hose assembly. Background Technology

[0002] PTFE pipes are widely used in chemical, semiconductor, energy, and high-end equipment industries for transporting gases and fluids. However, traditional PTFE pipes are prone to gas permeation when transporting small molecule gases (such as hydrogen and helium) due to their structural characteristics, posing a potential safety risk of combustion or even explosion. To address this, a flexible tube is currently used to encase the PTFE pipe, but this method involves complex assembly of the metal flexible tube and inner tube, making assembly difficult. Furthermore, some existing PTFE pipes lack pressure-resistant structures, limiting their maximum pressure resistance to 0.8 MPa, which is insufficient for applications with more stringent pressure and safety requirements, such as high-pressure hydrogen transport. Summary of the Invention

[0003] The purpose of this invention is to provide a hose assembly that can solve the above-mentioned problems.

[0004] To achieve the above objectives, embodiments of the present invention provide a hose assembly comprising: Inner tube; A flexible metal tube is fitted over the inner tube. The first connector is hollow, and both ends of the inner tube are provided with the first connector. The first connector abuts against the end of the inner tube and has a plug-in part that extends into the interior of the inner tube and is limited and connected to the inner tube by a limiting structure. A pressure ring, which fastens to both ends of the inner tube, ensuring a tight connection between the insertion portion and the inner tube; and The second connector is welded to both ends of the metal hose. The second connector is sleeved on the first connector and welded to the first connector. The outer walls of both the inner tube and the outer walls of the metal hose are wrapped with metal braided mesh.

[0005] Optionally, the limiting structure is a hook that is circumferentially wrapped around the plug portion, and the outer wall of the hook is inclined inward along the insertion direction of the plug portion. When the plug portion is inserted into the inner tube, the hook can be locked on the inner wall of the inner tube.

[0006] Optionally, multiple hooks are provided at intervals along the axial direction of the insertion portion.

[0007] Optionally, the first connector is provided with an annular groove, and the inner side of the pressure ring is provided with a protrusion that can be engaged in the annular groove.

[0008] Optionally, the two second connectors are provided with connecting grooves at their opposite ends, and the two ends of the metal hose respectively extend into the corresponding connecting grooves; The opposite ends of the two second connectors are provided with connection holes that communicate with the connection groove, and the first connector is adapted to the connection holes.

[0009] Optionally, the inner tube is a PTFE inner tube.

[0010] Optionally, the metal hose is a corrugated metal hose.

[0011] Compared with existing technologies, the advantages of this invention are as follows: The use of a limiting structure and pressure ring to secure the inner tube and the first connector ensures a tight connection, effectively preventing loosening or detachment, thereby enhancing the sealing effect at the connection. Simultaneously, the added metal hose not only provides protection for the inner tube and improves the pressure resistance and service life of the hose assembly, but also further strengthens the overall airtightness due to its high-density characteristics. This effectively prevents leakage during gas transportation, improving safety and reducing energy waste. The addition of a metal braided mesh improves the pressure resistance and structural strength of both the inner tube and the metal hose. Through the constraint and reinforcement of the metal braided mesh, the pressure that the hose assembly can withstand during operation increases from 0.8 MPa to 20 MPa, offering high safety and adaptability to higher pressure operating conditions. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a cross-sectional schematic diagram of the present invention.

[0014] Figure 2 This is a schematic diagram of the structure when the first connector and the inner tube are not connected in this invention.

[0015] Figure 3 This is a schematic diagram of the structure of the pressure ring in this invention when it is not clamped.

[0016] Figure 4 This is a schematic diagram of the welding structure between the second connector and the metal hose in this invention.

[0017] In the picture: 100. Inner tube; 200. Metal flexible hose; 300, First connector; 310, Insertion part; 320, Annular groove; 400, pressure ring; 410, convex buckle; 500, Second connector; 510, Connecting groove; 520, Connecting hole; 600, hook; 700. Metal woven mesh. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain embodiments of the present invention, and should not be construed as limiting the present invention.

[0019] In the description of the embodiments of the present invention, it should be understood that if the embodiments of the present invention involve directional indications, such as up, down, left, right, front, back, inside, outside, etc., the orientation or positional relationship of the indications is based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the embodiments of the present invention and simplifying the description, and is not intended to 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, it should not be construed as a limitation of the present invention.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In this embodiment of the invention, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part. They can be mechanical or electrical connections. They can be direct connections or indirect connections through an intermediate medium, and can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0022] like Figures 1 to 4 As shown, an embodiment of the present invention provides a hose assembly, including an inner tube 100, a metal hose 200, a first connector 300, a pressure ring 400, and a second connector 500.

[0023] The inner tube 100 is preferably a PTFE inner tube 100. The inside of the PTFE inner tube 100 is smooth, which can effectively reduce the resistance and pressure loss of fluid transportation and ensure the smooth flow of the medium (especially high purity or high viscosity media).

[0024] The metal flexible hose 200 is preferably a corrugated metal flexible hose, which is sleeved on the inner tube 100. Both ends of the inner tube 100 are provided with a first connector 300, which abuts against the end of the inner tube 100. The first connector 300 is hollow and has a plug-in portion 310 that extends into the interior of the inner tube 100 and is connected to the inner tube 100 by a limiting structure. A pressure ring 400 is pressed onto both ends of the inner tube 100, ensuring a tight connection between the plug-in portion 310 and the inner tube 100. The use of the limiting structure and pressure ring 400 for fixation ensures a tight connection between the inner tube 100 and the first connector 300, preventing loosening or detachment and enhancing the sealing performance of the connection.

[0025] Both ends of the metal flexible hose 200 are welded with second connectors 500. The second connectors 500 are fitted onto and welded to the first connector 300. Specifically, the opposite ends of the two second connectors 500 are provided with connecting grooves 510, and both ends of the metal flexible hose 200 extend into the corresponding connecting grooves 510. The opposite ends of the two second connectors 500 are provided with connecting holes 520 communicating with the connecting grooves 510, and the first connector 300 is fitted with the connecting holes 520. The connecting grooves 510 provide positioning and accommodating space for the metal flexible hose 200, making the welding operation more precise. The fitting of the connecting holes 520 with the first connector 300 ensures the alignment of the second connectors 500 and the first connector 300, resulting in a more compact overall structure after welding and reducing leakage points.

[0026] The metal hose 200 not only protects the inner tube 100, improving the overall pressure resistance and service life of the assembly, but also has better sealing properties due to its high density, preventing leakage of gases such as helium from the inner tube 100, thus effectively improving the safety of use.

[0027] During assembly, first assemble the inner tube 100 with the first connector 300, and then assemble the metal flexible tube 200 with the second connector 500, as follows: Assembly of inner tube 100 and first connector 300: First, put the pressure ring 400 on the inner tube 100, then insert the insertion part 310 of the first connector 300 into the end of the inner tube 100, then move the pressure ring 400 to the connection point between the inner tube 100 and the first connector 300, and then use a crimping machine to crimp the pressure ring 400 to connect the pressure ring 400 with the first connector 300 and the inner tube 100.

[0028] Assembly of the metal hose 200 and the second connector 500: Insert both ends of the metal hose 200 into the connecting groove 510 respectively, and further use a crimping machine to slightly crimp the outer wall of the connecting groove 510 to limit the metal hose 200 and the second connector 500. Then, weld the metal hose 200 and the second connector 500 together, specifically, around the crimping point.

[0029] Subsequently, the metal flexible hose 200 is fitted onto the inner tube 100, and the gap between the first connector 300 and the outer side of the connecting hole 520 is welded to fix the first connector 300 and ensure sealing. The entire assembly process is simple and convenient, and can effectively improve assembly efficiency.

[0030] Furthermore, a metal braided mesh 700 is wound around the outer wall of both the inner tube 100 and the outer wall of the metal hose 200. The metal braided mesh 700 improves the pressure resistance and structural strength of the inner tube 100 and the metal hose 200. Through the constraint and reinforcement of the metal braided mesh 700, the pressure that the hose assembly can withstand during operation is increased from 0.8 MPa to 20 MPa, ensuring high safety and adapting to higher pressure operating conditions.

[0031] In one embodiment, the limiting structure is a hook 600 circumferentially surrounding the insertion portion 310. The outer wall of the hook 600 is inclined inward along the insertion direction of the insertion portion 310. When the insertion portion 310 extends into the inner tube 100, the hook 600 can be engaged with the inner wall of the inner tube 100. That is, the hook 600 forms a groove (not shown in the figure) for limiting the hook 600 by pressing the inner wall of the inner tube 100, thereby limiting the connection. The hook 600 is inclined inward to form a guide slope. When the insertion portion extends into the inner tube, the slope guides the hook to be smoothly pressed in, eliminating the need for complex alignment or additional operations, enabling quick and smooth assembly, and improving the stability of the connection between the first connector 300 and the inner tube 100. Multiple hooks 600 are spaced apart along the axial direction of the insertion portion 310 to increase the limiting area and further ensure the stability of the connection between the first connector 300 and the inner tube 100.

[0032] In one embodiment, the first connector 300 is provided with an annular groove 320, and the inner side of the pressure ring 400 is provided with a protrusion 410 that can be engaged into the annular groove 320. The protrusion 410 on the inner side of the pressure ring 400 engages with the annular groove 320 of the first connector 300 to form a mechanical lock, ensuring that the pressure ring 400 will not be accidentally loosened and maintaining the stability of the clamping.

[0033] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flexible hose assembly, characterized in that, include: Inner tube (100); A metal flexible hose (200) is fitted onto the inner tube (100); The first connector (300) is hollow. Both ends of the inner tube (100) are provided with the first connector (300). The first connector (300) abuts against the end of the inner tube (100). The first connector (300) has a plug-in part (310). The plug-in part (310) extends into the interior of the inner tube (100) and is limitedly connected to the inner tube (100) by a limiting structure. A pressure ring (400) is fastened to both ends of the inner tube (100) to ensure a tight connection between the insertion part (310) and the inner tube (100); and The second connector (500) is welded to both ends of the metal hose (200). The second connector (500) is sleeved on the first connector (300) and welded to the first connector (300). Metal braided mesh (700) is wrapped around the outer wall of the inner tube (100) and the outer wall of the metal hose (200).

2. The hose assembly according to claim 1, characterized in that, The limiting structure is a hook (600) that is circumferentially wrapped around the plug (310) and the outer side wall of the hook (600) is inclined inward along the insertion direction of the plug (310). When the plug (310) is inserted into the inner tube (100), the hook (600) can be locked on the inner wall of the inner tube (100).

3. The hose assembly according to claim 2, characterized in that, The hooks (600) are provided at intervals along the axial direction of the insertion portion (310).

4. The hose assembly according to claim 2, characterized in that, The first connector (300) is provided with an annular groove (320), and the inner side of the pressure ring (400) is provided with a protrusion (410) that can be inserted into the annular groove (320).

5. The hose assembly according to any one of claims 1 to 4, characterized in that, The two second connectors (500) are provided with connecting grooves (510) at opposite ends, and the two ends of the metal hose (200) respectively extend into the corresponding connecting grooves (510); The two second connectors (500) are provided with connecting holes (520) communicating with the connecting groove (510) at opposite ends, and the first connector (300) is adapted to the connecting holes (520).

6. The hose assembly according to any one of claims 1 to 4, characterized in that, The inner tube (100) is a PTFE inner tube (100).

7. The hose assembly according to any one of claims 1 to 4, characterized in that, The metal hose (200) is a corrugated metal hose.

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