Asymmetric net sleeve metal hose and forming method thereof

Abstract

The invention relates to the technical field of flexible connecting pipelines, and discloses an asymmetric net sleeve metal hose and a forming method thereof.The asymmetric net sleeve metal hose comprises a corrugated pipe, the two ends of the corrugated pipe are fixedly connected with connecting pipes correspondingly, the outer side of the corrugated pipe is wrapped with a woven net sleeve, and the two ends of the woven net sleeve are fixedly connected with connecting rings correspondingly; the connecting ring is fixedly connected with the connecting pipe, and the woven mesh sleeve is of an unbalanced woven structure. The bending fatigue life of the metal hose is prolonged, the minimum bending radius is reduced, the self-supporting capacity of the metal hose in the specific direction is improved, and the application range of the metal hose is expanded.

Description

Technical Field

[0001] This application relates to the field of flexible connection pipeline technology, specifically to an asymmetric braided metal flexible hose and its forming method. Background Technology

[0002] Metal flexible hoses are widely used in large-scale installations such as nuclear power plants, ships, and aircraft due to their advantages such as high pressure resistance, high flexibility, effective absorption of pipeline vibration, and corrosion resistance. Currently, with technological advancements, the structural designs of large-scale projects and installations are becoming increasingly compact, and reliability requirements are rising. When metal flexible hoses are arranged in a curved configuration, installation space constraints often arise. On the one hand, it is necessary to reduce the bending stiffness in the bending direction and achieve a smaller bending radius while maintaining the same strength. On the other hand, it is desirable for the metal flexible hoses to have a large load-bearing capacity in the non-bending direction, enabling them to be installed on horizontal or inclined planes without auxiliary support, without losing their bending shape or experiencing unexpected failures under the influence of gravity or acceleration in other directions.

[0003] Conventional metal hose bending is difficult to reduce bending stiffness and bending radius when meeting high strength requirements, and can only be arranged on a vertical plane. Once subjected to a force with an angle to the arrangement plane, it will change the bending shape, resulting in unexpected deformation and potential failure risk, which cannot meet the needs of new devices. Summary of the Invention

[0004] The purpose of this application is to provide an asymmetric braided metal hose and its forming method to improve the bending fatigue life of metal hoses, reduce the minimum bending radius, improve the self-supporting capacity of metal hoses in a specific direction, and expand the application range of metal hoses.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The present invention discloses an asymmetrical braided metal flexible hose, comprising a corrugated tube, wherein each end of the corrugated tube is fixedly connected to a connecting pipe, the outer side of the corrugated tube is covered with a braided mesh sleeve, and each end of the braided mesh sleeve is fixedly connected to a connecting ring, the connecting ring being fixedly connected to the connecting pipe, and the braided mesh sleeve having an unbalanced braided structure.

[0007] Furthermore, the unbalanced weaving structure is an angle-unbalanced weaving structure.

[0008] Furthermore, the unbalanced weaving structure is a quantity-unbalanced weaving structure.

[0009] Furthermore, the unbalanced weaving structure is a weaving structure that is unbalanced in both angle and quantity.

[0010] A method for forming an asymmetric braided metal flexible hose includes the following steps:

[0011] The metal bellows is fixed tightly against the connector on the welding rotary table. The positioning fixture is used to ensure that the inner hole of the bellows is coaxial with the inner hole of the connector. The metal bellows and the connector are then welded and fixed.

[0012] The mesh weaving machine is configured to be unbalanced, and the mesh weaving machine weaves a mesh sleeve on the outside of the corrugated pipe, with the woven mesh sleeve tightly attached to the outer surface of the corrugated pipe;

[0013] After weaving is complete, attach connecting rings to both ends of the outer side of the netting and connect and fix the connecting rings to the pipe.

[0014] Furthermore, the method of unbalancedly configuring the braiding machine and weaving a braided mesh sleeve on the outside of the corrugated pipe, with the braided mesh sleeve tightly adhering to the outer surface of the corrugated pipe, includes:

[0015] The steel wires are stranded according to the required amount of imbalance. One number of steel wire strands are mounted on a clockwise rotating steel wire spindle, and another number of steel wire strands are mounted on a counterclockwise rotating steel wire spindle. The number of steel wire strands mounted on the clockwise rotating steel wire spindle is different from the number of steel wire strands mounted on the counterclockwise rotating steel wire spindle.

[0016] Furthermore, the method of unbalancedly configuring the braiding machine and weaving a braided mesh sleeve on the outside of the corrugated pipe, with the braided mesh sleeve tightly adhering to the outer surface of the corrugated pipe, includes:

[0017] The axis of the metal bellows is offset from the central axis of the rotation of the wire spindle of the braiding machine.

[0018] Furthermore, the method of unbalancedly configuring the braiding machine and weaving a braided mesh sleeve on the outside of the corrugated pipe, with the braided mesh sleeve tightly adhering to the outer surface of the corrugated pipe, includes:

[0019] The axis of the metal bellows is offset at an angle from the central axis of the rotation of the wire spindle of the braiding machine.

[0020] An asymmetric braided metal hose forming device includes a braiding machine and a traction machine arranged in parallel. The traction machine pulls and limits the asymmetric braided metal hose. A corrugated tube passes through the braiding machine. The limiting axis of the traction machine is offset from the rotation axis of the braiding machine.

[0021] Furthermore, the number of steel wire strands mounted on the clockwise rotating steel wire spindle of the braiding machine is different from the number of steel wire strands mounted on the counterclockwise rotating steel wire spindle.

[0022] Furthermore, the limiting axis of the traction machine is offset from the rotation axis of the braiding machine.

[0023] Furthermore, the limiting axis of the traction machine is set at an angle offset from the rotation axis of the weaving machine.

[0024] Compared with the prior art, the beneficial effects of this application are:

[0025] 1. Improve the bending fatigue life of metal hoses and reduce the minimum bending radius. By adopting an asymmetrical braided mesh structure, the density of the braided mesh in a specified bending direction can be reduced without reducing the strength of the metal hose. This increases the space for the steel wires in the braided mesh to be squeezed against each other, thereby reducing the bending radius in the specified bending direction, reducing the bending stress in the specified bending direction, and improving the bending fatigue life.

[0026] 2. Enhance the self-supporting capacity of metal hoses in specific directions and expand their application range. By adopting an asymmetrical braided mesh structure, the density of the braided mesh in non-specified bending directions is increased without reducing the strength of the metal hose. When the density of the braided mesh in non-specified bending directions exceeds 95%, the stiffness in these directions can be significantly improved, thereby increasing the load-bearing capacity in these directions. This allows the metal hose to maintain its bending shape during bending, reducing the impact of gravity or other forces on the metal hose in non-specified bending directions. Consequently, metal hoses can be used on horizontal, inclined, and other non-vertical surfaces. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the asymmetric mesh-sheathed metal flexible hose structure of the present invention;

[0029] Figure 2 This is a schematic diagram of a woven mesh structure in the prior art;

[0030] Figure 3 This is a schematic diagram of another woven mesh structure in the prior art;

[0031] Figure 4 This is a schematic diagram of another woven mesh structure in the existing technology;

[0032] Figure 5 This is a schematic diagram of the unbalanced quantity of the woven mesh sleeves of the present invention;

[0033] Figure 6 This is a schematic diagram of the angular imbalance of the woven mesh sleeve of the present invention;

[0034] Figure 7This is a schematic diagram of the structure of the present invention, in which the number and angle of the woven mesh sleeves are unbalanced;

[0035] Figure 8 This is a schematic diagram of the structure of the present invention, in which the number, angle, and linear density of the woven mesh sleeves are all unbalanced.

[0036] Figure 9 This is a schematic diagram of the existing mesh-sheathed metal hose forming device;

[0037] Figure 10 This is a schematic diagram of the structure of an embodiment of the asymmetric mesh sleeve metal hose forming device of the present invention;

[0038] Figure 11 This is a schematic diagram of another embodiment of the asymmetric mesh sleeve metal hose forming device of the present invention.

[0039] Reference numerals: 1. Corrugated pipe; 2. Connecting pipe; 3. Braided mesh sleeve; 4. Connecting ring; 5. Braiding machine; 6. Steel wire; 7. Steel wire spindle; 8. Traction machine; 9. Limiting axis; 10. Rotation axis. Detailed Implementation

[0040] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0041] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the layers related to the present invention and are not drawn according to the actual number, shape and size of the layers in the actual implementation. In the actual implementation, the form, number and proportion of each layer can be arbitrarily changed, and the layer layout may also be more complex.

[0042] Numerous details are explored in the following description to provide a more thorough explanation of embodiments of the invention; however, it will be apparent to those skilled in the art that embodiments of the invention may be practiced without these specific details.

[0043] Please see Figure 1 An asymmetrical braided metal flexible hose includes a corrugated pipe 1, with connecting pipes 2 fixedly connected to both ends of the corrugated pipe 1. The corrugated pipe 1 is covered with a braided mesh sleeve 3, and connecting rings 4 are fixedly connected to both ends of the braided mesh sleeve 3. The connecting rings 4 are fixedly connected to the connecting pipes 2. The braided mesh sleeve 3 has an unbalanced braided structure.

[0044] Please see Figure 6 The unbalanced weaving structure is an angle-unbalanced weaving structure.

[0045] Please see Figure 5 The unbalanced weaving structure is a quantity-unbalanced weaving structure.

[0046] Please see Figure 7 The unbalanced weaving structure is a weaving structure that is unbalanced in both angle and quantity.

[0047] A method for forming an asymmetric braided metal flexible hose includes the following steps:

[0048] First, fix the metal bellows 1 tightly against the connector 2 on the welding rotary table. Use positioning fixtures to ensure that the inner hole of the bellows 1 is coaxial with the inner hole of the connector 2. Then weld and fix the metal bellows 1 and the connector 2.

[0049] The mesh weaving machine 5 is configured to be unbalanced, and the mesh weaving machine 5 weaves the mesh sleeve 3 on the outside of the corrugated pipe 1, and the woven mesh sleeve 3 is tightly attached to the outer surface of the corrugated pipe 1;

[0050] After weaving is completed, attach connecting rings 4 to both ends of the outer side of the netting and connect and fix the connecting rings 4 to the connecting pipe 2.

[0051] The method of setting the mesh weaving machine 5 to be unbalanced, and weaving the mesh sleeve 3 on the outside of the corrugated pipe 1 by the mesh weaving machine 5, wherein the woven mesh sleeve 3 is tightly attached to the outer surface of the corrugated pipe 1 includes:

[0052] The steel wires 6 are stranded according to the required imbalance. One number of steel wire strands 6 are mounted on the clockwise rotating steel wire spindle 7, and another number of steel wire strands 6 are mounted on the counterclockwise rotating steel wire spindle 7. The number of steel wire strands 6 mounted on the clockwise rotating steel wire spindle 7 is different from the number of steel wire strands 6 mounted on the counterclockwise rotating steel wire spindle 7.

[0053] The method of setting the mesh weaving machine 5 to be unbalanced, and weaving the mesh sleeve 3 on the outside of the corrugated pipe 1 by the mesh weaving machine 5, wherein the woven mesh sleeve 3 is tightly attached to the outer surface of the corrugated pipe 1 includes:

[0054] The axis of the metal bellows 1 is offset from the central axis of the rotation of the wire spindle 7 of the braiding machine 5.

[0055] The method of setting the mesh weaving machine 5 to be unbalanced, and weaving the mesh sleeve 3 on the outside of the corrugated pipe 1 by the mesh weaving machine 5, wherein the woven mesh sleeve 3 is tightly attached to the outer surface of the corrugated pipe 1 includes:

[0056] The axis of the metal bellows 1 is offset at an angle from the central axis of rotation of the wire spindle 7 of the braiding machine 5.

[0057] Please see Figure 10 and Figure 11 An asymmetric mesh-coated metal hose forming device includes a braiding machine 5 and a traction machine 8 arranged in parallel. The traction machine 8 pulls and limits the asymmetric mesh-coated metal hose. A corrugated pipe 1 passes through the braiding machine 5. The limiting axis 9 of the traction machine 8 is offset from the rotation axis 10 of the braiding machine 5.

[0058] The number of steel wires on the clockwise rotating steel wire spindle 7 of the braiding machine 5 is different from the number of steel wires on the counterclockwise rotating steel wire spindle 7.

[0059] Please see Figure 10 The limiting axis 9 of the traction machine 8 is offset from the rotation axis 10 of the braiding machine 5.

[0060] Please see Figure 11 The limiting axis 9 of the traction machine 8 is angularly offset from the rotation axis 10 of the braiding machine 5.

[0061] Please see Figure 1 The bellows 1 is a cylindrical thin-walled shell with transverse corrugations. Under the action of force, it can be stretched, shortened and bent, realizing the bending deformation of the metal hose and the ability to seal the medium in the metal hose.

[0062] Please see Figures 5 to 8 The braided mesh sleeve 3 is made of several intersecting strands of metal wires woven in a certain order and at a specified angle. It is installed on the outer surface of the metal bellows 1 and shares the static load of the bellows 1 in the axial and radial directions. It is the main component that bears the internal pressure of the medium in the metal hose.

[0063] Please see Figure 1 The connecting ring 4 serves to connect the braided mesh sleeve 3 and the connecting pipe 2.

[0064] Please see Figure 1 Pipe 2 connects to bellows 1, connecting ring 4, and the configured assembly joint.

[0065] Please see Figures 5 to 8 The woven mesh 3 is an unbalanced weaving structure. Unbalanced weaving structures include: angular unbalanced weaving structures, quantity unbalanced weaving structures, and weaving structures with both angular and quantity unbalanced. Unbalance means asymmetry.

[0066] (1) Angle-imbalanced weaving structure:

[0067] Please see Figure 2 In the braiding process of ordinary metal flexible hoses, each steel wire 6 is braided at a fixed braiding angle, resulting in a symmetrical braided mesh sleeve 3. (Please refer to...) Figure 6 In this embodiment, the steel wire 6 is woven in an asymmetrical manner by adjusting the weaving angle.

[0068] Please see Figure 2 For example, a typical metal flexible hose uses a 45° braiding angle, with the two steel wires 6 crossing at a 90° angle, and the two steel wires 6 are symmetrical. Please refer to [link / reference]. Figure 6 In this embodiment, the braiding angle of the clockwise rotating steel wire 6 is 50° and the braiding angle of the counterclockwise rotating steel wire 6 is 40°. Finally, the cross angle of the two steel wires 6 is 90°, just like the braided mesh sleeve 3 of a regular metal hose.

[0069] (2) Imbalanced staffing structure:

[0070] Please see Figure 3 In ordinary metal flexible hoses, during the braiding process of the braided mesh sleeve 3, each strand of steel wire 6 has the same number of wires 6, thus the braided mesh sleeve 3 exhibits symmetry. (See also...) Figure 5 In this embodiment, the number of steel wires 6 is adjusted so that the number of non-conforming steel wires 6 is different, so that the steel wires 6 are woven in an asymmetrical manner.

[0071] Please see Figure 3 For example, taking a typical metal flexible hose as an example, all the steel wires 6 strands in the braided mesh sleeve 3 are made of 11 steel wires 6 with a diameter of 0.3mm, arranged symmetrically. Please refer to [link / reference]. Figure 5 In this embodiment, each clockwise rotating steel wire 6 uses 13 steel wires 6 with a diameter of 0.3mm, and each counterclockwise rotating steel wire 6 uses 9 steel wires 6 with a diameter of 0.3mm.

[0072] (3) The structure is unbalanced in both angle and quantity:

[0073] Please see Figure 7 In this embodiment, the weaving angle and the number of weaves are also different.

[0074] Please see Figure 4 For example, a standard metal flexible hose uses a 45° braiding angle, and all six strands of steel wire consist of 11 strands of 0.3mm diameter steel wire, arranged symmetrically. Please refer to [link / reference]. Figure 7 In this embodiment, the clockwise rotating steel wire 6 has a 40° braiding angle and 15 steel wires 6 with a diameter of 0.3mm, while the counterclockwise rotating steel wire 6 has a 50° braiding angle and 9 steel wires 6 with a diameter of 0.3mm.

[0075] Please see Figures 5 to 8In this invention, an unbalanced design results in varying densities of the braided mesh sleeve 3. For the lower-density portion, there is more space for the steel wires 6 to compress each other during the bending process of the metal hose, resulting in a smaller bending radius, lower stiffness, and better fatigue life. For the higher-density portion, when the density of the braided mesh sleeve 3 exceeds 95%, the space for the steel wires 6 to compress each other is extremely small, thus resulting in greater stiffness and better load-bearing capacity. Although the density of the braided mesh sleeve 3 is uneven in this invention, the average density is comparable to that of ordinary metal hoses, thus preventing a decrease in the overall strength of the invention.

[0076] Please see Figures 9 to 11 The braiding machine 5 and the traction machine 8 are arranged side by side. The traction machine 8 is used to pull and limit the asymmetrical mesh metal hose. The corrugated pipe 1 passes through the braiding machine 5. The limiting axis 9 of the traction machine 8 and the rotation axis 10 of the braiding machine 5 are offset or angled.

[0077] The number of 6 strands of steel wire mounted on the clockwise rotating steel wire spindle 7 of the braiding machine 5 is different from the number of 6 strands of steel wire mounted on the counterclockwise rotating steel wire spindle 7 (not shown in the figure).

[0078] A comparative test was conducted on the asymmetric braided metal flexible hose of the present invention with a specification of DN15 and a conventional braided metal flexible hose of the same specification:

[0079] This invention adjusts the braiding angle of the wire mesh 6 from 45° in conventional metal hoses to 38° / 52°. Tests show that the burst pressure of the asymmetrical wire mesh metal hose of this invention is 51MPa~55MPa, comparable to that of ordinary metal hoses, indicating comparable pressure resistance. The radial stiffness of ordinary metal hoses is 0.8N / mm; the maximum radial stiffness of the asymmetrical wire mesh metal hose is 6.7N / mm, and the minimum radial stiffness is 0.6N / mm. This invention successfully achieves the bending arrangement of the metal hose on an inclined plane without it sagging under gravity by adopting an asymmetrical braiding angle scheme.

[0080] A comparative test was conducted on the asymmetric braided metal flexible hose of the present invention with a specification of DN25 and a conventional braided metal flexible hose of the same specification:

[0081] This invention adjusts the number of braided steel wires 6 in the mesh sleeve from 11*11 in conventional metal hoses to 13*9. Tests show that the burst pressure of the asymmetrical mesh sleeve metal hose of this invention is 23MPa~27MPa, comparable to that of ordinary metal hoses, demonstrating similar pressure resistance. The radial stiffness of ordinary metal hoses is 9.7N / mm, with approximately 12,000 bending fatigue cycles and a static minimum bending radius of approximately 140mm. The asymmetrical mesh sleeve metal hose has a maximum radial stiffness of 90.6N / mm, a minimum radial stiffness of 3.5N / mm, approximately 20,000 bending fatigue cycles, and a static minimum bending radius of approximately 110mm. This invention, by employing an asymmetrical mesh sleeve braiding scheme, enables the arrangement of metal hoses in small spaces. This not only avoids the risk of metal hoses sagging and rubbing against other pipes due to gravity when the arrangement plane is horizontal, but also significantly increases the fatigue life of the metal hoses, improving reliability.

[0082] The main objective of this invention is to expand the application range of metal hoses and meet the needs of new devices. By adopting an asymmetrical braided mesh sleeve 3 structure, the metal hose exhibits different stiffnesses in different bending directions without reducing its strength. On the one hand, reducing the density of the braided mesh sleeve 3 in a specified bending direction can reduce the stiffness in that direction, thereby reducing the bending radius and improving bending fatigue life. On the other hand, increasing the density of the braided mesh sleeve 3 in non-specified bending directions can significantly increase the stiffness in those directions, thereby improving the load-bearing capacity in those directions. This allows the metal hose to maintain its bending shape during bending, reducing the impact of gravity or other forces on the metal hose in non-specified bending directions.

[0083] In the above embodiments, although the invention has been described in conjunction with specific embodiments thereof, many substitutions, modifications, and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. The embodiments of the invention are intended to cover all such substitutions, modifications, and variations falling within the broad scope of the appended claims.

[0084] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. An asymmetric braided metal flexible hose, characterized in that: It includes a corrugated pipe (1), with pipes (2) fixedly connected to both ends of the corrugated pipe (1), and a woven mesh sleeve (3) covering the outside of the corrugated pipe (1). Connecting rings (4) are fixedly connected to both ends of the woven mesh sleeve (3), and the connecting rings (4) are fixedly connected to the pipes (2). The woven mesh sleeve (3) has an unbalanced woven structure.

2. The asymmetric braided metal flexible hose according to claim 1, characterized in that, The unbalanced weave structure is an angle-unbalanced weave structure.

3. The asymmetric braided metal flexible hose according to claim 1, characterized in that, The unbalanced weaving structure is a quantity-unbalanced weaving structure.

4. The asymmetric braided metal flexible hose according to claim 1, characterized in that, The unbalanced weaving structure is a weaving structure that is unbalanced in both angle and quantity.

5. A method for forming an asymmetric mesh-sheathed metal flexible hose, characterized in that, Includes the following steps: The metal bellows (1) is fixed tightly against the pipe (2) on the welding rotary table. The inner hole of the bellows (1) and the inner hole of the pipe (2) are made coaxial by the positioning fixture. The metal bellows (1) and the pipe (2) are then welded and fixed. The netting weaving machine (5) is configured to be unbalanced, and the netting weaving machine (5) weaves a netting (3) on the outside of the corrugated pipe (1), with the netting (3) closely attached to the outer surface of the corrugated pipe (1); After weaving, attach connecting rings (4) to both ends of the outer side of the netting and connect and fix the connecting rings (4) to the connecting pipe (2).

6. The method for forming an asymmetric mesh-sheathed metal flexible hose according to claim 5, characterized in that, The method of arranging the mesh weaving machine (5) in an unbalanced configuration and weaving a mesh sleeve (3) on the outside of the corrugated pipe (1) by the mesh weaving machine (5), wherein the woven mesh sleeve (3) is tightly attached to the outer surface of the corrugated pipe (1), includes: The steel wires (6) are stranded according to the required imbalance. One number of steel wires (6) strands are mounted on a clockwise rotating steel wire spindle (7), and another number of steel wires (6) strands are mounted on a counterclockwise rotating steel wire spindle (7). The number of steel wires (6) strands mounted on the clockwise rotating steel wire spindle (7) is different from the number of steel wires (6) strands mounted on the counterclockwise rotating steel wire spindle (7).

7. A method for forming an asymmetric mesh-sheathed metal flexible hose according to claim 5 or 6, characterized in that, The method of arranging the mesh weaving machine (5) in an unbalanced configuration and weaving a mesh sleeve (3) on the outside of the corrugated pipe (1) by the mesh weaving machine (5), wherein the woven mesh sleeve (3) is tightly attached to the outer surface of the corrugated pipe (1), includes: The axis of the metal bellows (1) is offset from the central axis of the rotation of the wire spindle (7) of the braiding machine (5).

8. A method for forming an asymmetric mesh-sheathed metal flexible hose according to claim 5 or 6, characterized in that, The method of arranging the mesh weaving machine (5) in an unbalanced configuration and weaving a mesh sleeve (3) on the outside of the corrugated pipe (1) by the mesh weaving machine (5), wherein the woven mesh sleeve (3) is tightly attached to the outer surface of the corrugated pipe (1), includes: The axis of the metal bellows (1) is angularly offset from the central axis of rotation of the wire spindle (7) of the braiding machine (5).

9. An asymmetric mesh-sheathed metal hose forming device, characterized in that, The device includes a braiding machine (5) and a traction machine (8) arranged side by side. The traction machine (8) pulls and limits the asymmetrical mesh metal hose. A corrugated pipe (1) passes through the braiding machine (5). The limiting axis (9) of the traction machine (8) is offset from the rotation axis (10) of the braiding machine (5). The number of steel wires (6) on the clockwise rotating steel wire spindle (7) of the braiding machine (5) is different from the number of steel wires (6) on the counterclockwise rotating steel wire spindle (7).

10. The method for forming an asymmetric mesh-sheathed metal flexible hose according to claim 9, characterized in that, The limiting axis (9) of the traction machine (8) is offset from the rotation axis (10) of the braiding machine (5) by displacement or angle.

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