High-pressure hose

Abstract

High-pressure hose, including: an inner tube (10) that defines an axial direction and a circumferential direction around the axial direction; a first braided layer (20) which is laid around the inner tube (10) and has several first braided yarns (21) and several first imaginary axes (22) which are arranged separately in the circumferential direction, each of the several first imaginary axes (22) passing through several first nodes (23) of the several first braided yarns (21); and a second braided layer (30) which is looped around the first braided layer (20), with several second braided yarns (31) and several second imaginary axes (32) which are arranged separately in the circumferential direction, wherein each of the several second imaginary axes (32) passes through several second nodes (33) of the several second braided yarns (31), wherein the second braided layer (30) comes into direct contact with the first braided layer (20) and is at least partially movable on the first braided layer (20); wherein the several first imaginary axes (22) are at least partially offset from the several second imaginary axes (32) in a radial direction of the inner tube (10); further comprising two connectors (40) arranged at two ends of the high-pressure hose (1), each connector (40) consisting of a connector head (41) and a sleeve part (42), each connector head (41) being partially located inside one end of the inner hose (10), and each sleeve part (42) being sheathed on an outer surface of the second braid layer (30) and radially overlapping with one of the connector heads (41) to clamp the inner hose (10), the first braid layer (20) and the second braid layer (30) between them; wherein each of the several first imaginary axes (22) and each of the several second imaginary axes (32) are parallel to the axial direction; in the radial direction each of the several first imaginary axes (22) is arranged between two adjacent of the several second imaginary axes (32); wherein along a length of the high-pressure hose (1) a number of the several first nodes (23) is smaller than a number of the several second nodes (33); and wherein along the length of the high-pressure hose (1) at least 50% of the several second nodes (33) are offset from the several first nodes (23) in the radial direction; the inner hose (10) is made of thermoplastic polyurethane; several of the first braided yarns (21) and several of the second braided yarns (31) are made of the same material; the several first braided yarns (21) and the several second braided yarns (31) are made of polyester;a number of the several first braided yarns (21) is equal to a number of the several second braided yarns (31); each of the several first braided yarns (21) and each of the several second braided yarns (31) contains several filament fibers (211, 311); each of the several filament fibers (211, 311) is a 1500 denier or 3000 denier polyester fiber; the first braided layer (20) and the second braided layer (30) were each produced by a braiding machine with 48 carriers; the weight of the inner tube (10) is between 50-60 g / m and the total weight of the first braided layer (20) and the second braided layer (30) is between 40-50 g / m; Each connection head (41) has an annular recess (411) and each sleeve part (42) has an annular flange (421) that engages in one of the annular recesses (411);the high-pressure hose (1) further comprises two connecting sleeves (50) which are movably connected to the outer surface of the second braided layer (30) and each of the two connecting sleeves has an internal thread segment (51).

Description

BACKGROUND OF THE INVENTION Technical field

[0001] The present invention relates to a high-pressure hose. State of the art

[0002] There are many different types of hoses, such as air hoses, water hoses, industrial hoses, etc., and the hoses can be made from various materials to meet different requirements. A water hose, for example, generally needs to be age-resistant, corrosion-resistant, flexible, and pressure-resistant.

[0003] US patent US 11 898 662 B2 discloses a high-performance hose assembly comprising an inner hose, a first braided layer around the inner hose, and a second braided layer surrounding the first braided layer.

[0004] Document EP 0 024 512 A1 describes a flexible high-pressure hose reinforced with composite fibers and fatigue-resistant under pressure pulsations and bending conditions.

[0005] A hydraulic supply hose, as shown in document US 8 356 637 B2, comprises an inner tube, a first layer, a second layer, and a sheath.

[0006] Document DE 696 04 856 T2 also concerns a high-pressure hose in whose hose structure several reinforcing layers are incorporated.

[0007] Document FR 1 372 180 A further shows a coupling for flexible or bendable hoses that are subject to very high internal pressure.

[0008] However, hoses using state-of-the-art technology are made of polyvinyl chloride or rubber, which are heavy and environmentally harmful. Furthermore, these hoses tend to become brittle or sticky and are not suitable for long-term use. To increase the hose's structural strength, layers of metal, plastic, or fibrous materials must be bonded together with adhesives and wrapped around the hose. This reduces the hose's flexibility and can cause the layers to separate during use.

[0009] The present invention aims to eliminate or at least mitigate the aforementioned disadvantages. TASK OF INVENTION

[0010] The main objective of the present invention is to create a high-pressure hose that has good pressure resistance, good flexibility and good wear resistance.

[0011] To achieve the aforementioned and further objectives, the present invention aims to create a high-pressure hose characterized by the features of claim 1 and comprising the following components: an inner hose, a first braided layer, and a second braided layer. The inner hose defines an axial direction and a circumferential direction around the axial direction. The first braided layer is placed around the inner hose and comprises several first braided yarns and several first imaginary axes, which are arranged separately in the circumferential direction. Each of the several first imaginary axes is guided through several first nodes of the several first braided yarns. The second braided layer is looped around the first braided layer and comprises several second braided yarns and several second imaginary axes, which are arranged separately in the circumferential direction.Each of the multiple second imaginary axes passes through multiple second nodes of the multiple second braided yarns. The multiple first imaginary axes are at least partially offset from the multiple second imaginary axes in a radial direction of the inner tube.

[0012] The present invention will become more obvious with reference to the following description and the accompanying drawings, which are shown for illustrative purposes only as the preferred embodiment(s) according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 shows a stereogram of a preferred embodiment of the present invention; Fig. Figure 2 shows a partial representation of a preferred embodiment of the present invention; Fig. Figure 3 shows a partial magnification of a first and a second braid layer according to a preferred embodiment of the present invention; and Fig. Figure 4 shows a partial cross-sectional view of a preferred embodiment of the present invention. WAYS TO IMPLEMENT THE PREFERRED EXECUTION EXAMPLES

[0013] The Fig. Figures 1 to 4 show a preferred embodiment of the present invention. A high-pressure hose 1 of the present invention consists of an inner hose 10, a first braided layer 20 and a second braided layer 30.

[0014] The inner tube 10 defines an axial direction and a circumferential direction around the axial direction. The first braid layer 20 is placed around the inner tube 10 and comprises several first braided yarns 21 and several first imaginary axes 22, which are arranged separately in the circumferential direction. Each of the several first imaginary axes 22 is guided through several first nodes 23 of the several first braided yarns 21. The second braid layer 30 is wrapped around the first braid layer 20 and comprises several second braided yarns 31 and several second imaginary axes 32, which are arranged separately in the circumferential direction. Each of the several second imaginary axes 32 is guided through several second nodes 33 of the several second braided yarns 31.The multiple first imaginary axes 22 are at least partially offset with the multiple second imaginary axes 32 in a radial direction of the inner tube 10, so that the inner tube 10 is covered by at least one of the multiple first nodes 23 and the multiple second nodes 33 in the radial direction, which enables good pressure resistance, good flexibility and good wear resistance.

[0015] In particular, along a length of the high-pressure hose 1, the number of multiple first knots 23 is smaller than the number of multiple second knots 33; along the length of the high-pressure hose 1, at least 50% of the multiple second knots 33 are radially offset from the multiple first knots 23. It is understandable that several gaps are formed between multiple first braided yarns 21 and between multiple second braided yarns 31, which are arranged side by side, resulting in relatively weak structural strength at these positions.With the multiple first nodes 23 and the multiple second nodes 33, which are arranged alternately in the circumferential direction, the plurality of holes of one of the first braid layer 20 and the second braid layer 30 can be covered by the nodes of the other of the first braid layer 20 and the second braid layer 30, resulting in a structural reinforcement effect.

[0016] Each of the several first imaginary axes 22 and each of the several second imaginary axes 32 are parallel to the axial direction. In the radial direction, each of the several first imaginary axes 22 lies between two adjacent second imaginary axes 32 (see Fig. 3) When the high-pressure hose expands due to the internal fluid pressure, the first braid layer 20 and the second braid layer 30 therefore ensure a uniform limiting force of the inner hose 10, so that the high-pressure hose is not so easily deformed and is durable in use.

[0017] The inner tube 10 is made of thermoplastic polyurethane, which withstands a working temperature between -20°C and 60°C and exhibits good tensile strength, flexibility, and abrasion resistance. The majority of the first braided yarns 21 and the majority of the second braided yarns 31 are made of the same material. The number of multiple first braided yarns 21 is equal to the number of multiple second braided yarns 31; the multiple first braided yarns 21 and the multiple second braided yarns 31 are made of polyester; each of the multiple first braided yarns 21 and each of the multiple second braided yarns 31 contains multiple filament fibers 211, 311; each of the multiple filament fibers 211, 311 is a 1500 denier or 3000 denier polyester fiber to provide sufficient structural strength, cut resistance, and aging resistance.Preferably, the weight of the inner hose 10 is between 50 and 60 g / m, and the combined weight of the first braid layer 20 and the second braid layer 30 is between 40 and 50 g / m. With the structure described above, the high-pressure hose 1 can be used at a working pressure of more than 3000 psi. In other examples not within the scope of the present invention, the number of first braided yarns 21 can differ from the number of second braided yarns 31, and the first braided yarns 21 and the second braided yarns 31 can be made of at least one of the following materials: nylon, polypropylene, polyvinyl chloride, or rubber.

[0018] During manufacturing, the first braid layer 20 and the second braid layer 30 are each produced using a braiding machine with 48 carriers, whereby the second braid layer 30 directly contacts the first braid layer 20 without the application of an adhesive material in between, which is easy to produce. Therefore, the second braid layer 30 is at least partially movable relative to the first braid layer 20 in order to maintain the flexibility of the high-pressure hose 1.

[0019] The high-pressure hose 1 further comprises two connectors 40 arranged at two ends of the high-pressure hose 1, each connector 40 consisting of a connector head 41 and a sleeve part 42. Each connector head 41 is partially located inside one end of the inner hose 10, and each sleeve part 42 is pushed onto an outer surface of the second braid layer 30 and radially overlaps one of the connector heads 41 to clamp the inner hose 10, the first braid layer 20, and the second braid layer 30 between them (see Fig.4), which is practical to assemble. In addition, each connection head 41 has an annular recess 411 and each sleeve part 42 has an annular flange 421 that engages in one of the annular recesses 411 to enable a stable assembly. The two connection pieces 40 are made of stainless steel, aluminum, or copper to ensure good pressure resistance. Preferably, the high-pressure hose 1 further comprises two connection sleeves 50 that are movably attached to the outer surface of the second braid layer 30, each of the two connection sleeves 50 having an internal thread segment 51 so that each of the two connection sleeves 50 can be screwed onto an external thread segment of an object to be connected to create a stable connection.Alternatively, one of the two connecting sleeves 50 can have the internal thread segment and the other of the two connecting sleeves 50 can have an external thread segment to meet different requirements.

Claims

[1] High-pressure hose comprising: an inner tube (10) that defines an axial direction and a circumferential direction around the axial direction; a first braided layer (20) which is laid around the inner tube (10) and has several first braided yarns (21) and several first imaginary axes (22) which are arranged separately in the circumferential direction, each of the several first imaginary axes (22) passing through several first nodes (23) of the several first braided yarns (21); and a second braided layer (30) which is looped around the first braided layer (20), with several second braided yarns (31) and several second imaginary axes (32) which are arranged separately in the circumferential direction, wherein each of the several second imaginary axes (32) passes through several second nodes (33) of the several second braided yarns (31), wherein the second braided layer (30) comes into direct contact with the first braided layer (20) and is at least partially movable on the first braided layer (20); wherein the several first imaginary axes (22) are at least partially offset from the several second imaginary axes (32) in a radial direction of the inner tube (10); further comprising two connectors (40) arranged at two ends of the high-pressure hose (1), each connector (40) consisting of a connector head (41) and a sleeve part (42), each connector head (41) being partially located inside one end of the inner hose (10), and each sleeve part (42) being sheathed on an outer surface of the second braid layer (30) and radially overlapping with one of the connector heads (41) to clamp the inner hose (10), the first braid layer (20) and the second braid layer (30) between them; wherein each of the several first imaginary axes (22) and each of the several second imaginary axes (32) are parallel to the axial direction; in the radial direction each of the several first imaginary axes (22) is arranged between two adjacent of the several second imaginary axes (32); wherein along a length of the high-pressure hose (1) a number of the several first nodes (23) is smaller than a number of the several second nodes (33); and wherein along the length of the high-pressure hose (1) at least 50% of the several second nodes (33) are offset from the several first nodes (23) in the radial direction; the inner hose (10) is made of thermoplastic polyurethane; several of the first braided yarns (21) and several of the second braided yarns (31) are made of the same material; the several first braided yarns (21) and the several second braided yarns (31) are made of polyester;a number of the several first braided yarns (21) is equal to a number of the several second braided yarns (31); each of the several first braided yarns (21) and each of the several second braided yarns (31) contains several filament fibers (211, 311); each of the several filament fibers (211, 311) is a 1500 denier or 3000 denier polyester fiber; the first braided layer (20) and the second braided layer (30) were each produced by a braiding machine with 48 carriers; the weight of the inner tube (10) is between 50-60 g / m and the total weight of the first braided layer (20) and the second braided layer (30) is between 40-50 g / m; Each connection head (41) has an annular recess (411) and each sleeve part (42) has an annular flange (421) that engages in one of the annular recesses (411);the high-pressure hose (1) further comprises two connecting sleeves (50) which are movably connected to the outer surface of the second braided layer (30) and each of the two connecting sleeves has an internal thread segment (51).

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