Abrasion-resistant metal hose with adjustable braided angle soft metal mesh sleeve

Abstract

This invention discloses an anti-wear metal hose with an adjustable braided angle soft metal mesh sleeve, comprising a flange, a connector, a soft metal mesh sleeve, and a bellows. The connector includes a connecting pipe, with both ends of the bellows connected to the flange via the connector. The outer wall of the bellows is fitted with the soft metal mesh sleeve. The connector includes a connecting pipe that connects the flange and the bellows. A first branch pipe, which can rotate along the outer circumference of the connecting pipe in response to external vibrations, is fitted outside the connecting pipe. A movable component, which can move towards the flange as the first branch pipe rotates, is also provided. The movable component is connected to a metal wire in the soft metal mesh sleeve to drive the metal wire to move. One end of the metal wire connected to the movable component has a pitch position spaced apart, corresponding to the pitch of the braided strands of the soft metal mesh sleeve. A locking component is also provided to limit the pitch position. This invention makes the braided angle of the soft metal mesh sleeve actively adjustable, improving the sealing performance of the metal hose, increasing the flexibility of the metal mesh sleeve, and reducing the wear of the bellows.

Description

Technical Field

[0001] This invention relates to a metal hose, and more particularly to an abrasion-resistant metal hose with an adjustable braided angle soft metal mesh sleeve. Background Technology

[0002] Metal flexible hoses are pipe connection and compensation devices, typically composed of weld neck flanges, bellows, fittings, and metal braided sleeves. They possess numerous excellent properties such as sealing performance, pressure resistance, high temperature resistance, corrosion resistance, and fatigue resistance, making them an indispensable elastic element in modern engineering technology.

[0003] Metal flexible hoses typically operate in harsh environments with significant vibration and displacement in their connected components. In some specialized applications, when metal flexible hoses are installed in an S-shape, the corrugated pipe can wear against the metal braided sheath, leading to hose failure. Further research indicates that the leakage mode of metal flexible hoses is clearly wear between the corrugated pipe and the braided layer. The braided layer, produced by a cold-drawing process, has a much higher hardness than the corrugated pipe, further increasing the probability of this abnormality.

[0004] Currently, the common method to avoid friction and wear between the corrugated pipe and the braided layer is to add a wear-resistant layer. However, traditional wear-resistant layers often use materials such as asbestos cloth, which have a large thickness and poor wear resistance under S-shaped installation conditions. Summary of the Invention

[0005] Purpose of the invention: The purpose of this invention is to provide an anti-wear metal hose with an adjustable braided angle soft metal mesh sleeve that is not easily worn during S-type installation.

[0006] Technical Solution: The wear-resistant metal hose with an adjustable braided angle soft metal mesh sleeve of the present invention includes a flange, a connector, a soft metal mesh sleeve, and a corrugated pipe; both ends of the corrugated pipe are connected to the flange through the connector, and the outer wall of the corrugated pipe is fitted with a soft metal mesh sleeve; the connector includes a connecting pipe for connecting the flange and the corrugated pipe, and a first branch pipe that can rotate along the outer circumference of the connecting pipe with external vibration is fitted on the outside of the connecting pipe. The first branch pipe has a movable part that can move towards the flange as the first branch pipe rotates; the movable part is connected to the metal wire in the soft metal mesh sleeve to drive the metal wire to move; one end of the metal wire connected to the movable part is provided with pitch positions along the length direction of the metal wire, corresponding to the pitch of the braided strands of the soft metal mesh sleeve, and a locking part is also provided to limit the pitch positions to prevent the metal wire from resetting after moving with the movable part.

[0007] The first branch pipe is fitted with a sleeve on its outer side, and the movable part is located inside the sleeve. The inner wall of the sleeve is provided with a guide rail to facilitate the movable part to move in a straight line towards the flange.

[0008] One end of the sleeve is fixed to the connecting pipe by a connector, and the connector and the sleeve are nested to form an annular gap for the movable part to drive the metal wire through.

[0009] The metal wire has a protrusion at the pitch position that can fix the pitch position within the annular gap when the moving part moves away from the flange.

[0010] The other end of the sleeve is provided with a baffle for limiting the moving part and preventing it from moving out of the sleeve.

[0011] The first branch pipe has an external thread on its outer wall. The movable part is sleeved on the outer wall of the first branch pipe and has an internal thread that matches the external thread of the first branch pipe. The movable part moves linearly along the axial direction of the first branch pipe due to the cooperation of the internal and external threads.

[0012] The first branch pipe is a lead screw sleeved on the outer wall of the connecting pipe; the movable part is a nut sleeved on the lead screw, and one end of the metal wire is fixed on the circumference of the thread; the cooperation between the lead screw and the nut converts the circular motion of the lead screw into the linear motion of the nut.

[0013] Among them, a ball bearing is provided between the first branch pipe and the moving part to reduce the friction between them.

[0014] The first branch pipe is provided with an anti-slip layer between it and the connecting pipe to facilitate the rotation of the first branch pipe.

[0015] A wear-resistant layer is provided between the soft metal mesh sleeve and the corrugated pipe.

[0016] The connecting pipe is welded to the bellows and the connecting parts by argon arc welding on the side near the bellows, and the connecting pipe is welded to the welding flange by argon arc welding on the side near the welding flange to ensure the sealing of the metal hose.

[0017] Beneficial effects: Compared with the prior art, the present invention achieves the following significant effects:

[0018] (1) The present invention sets the braiding angle of the soft metal mesh sleeve to be actively adjustable. The circular motion of the first branch pipe due to the external vibration load is converted into the linear motion of the movable part. The movable part can pull the metal wire of the soft metal mesh sleeve, so that the pitch of the metal wire is reduced and the braiding angle is increased, thereby increasing the flexibility of the metal mesh sleeve and reducing the wear of the corrugated pipe caused by the relative movement between the corrugated pipe and the mesh sleeve; (2) The setting of the self-locking part at the end of the metal wire can make the metal wire self-locking after being pulled, thereby completing the adjustment of the braiding angle; (3) The corrugated pipe and the metal mesh sleeve slide relative to each other. The hardness of the braided layer under the cold drawing process is much higher than that of the corrugated pipe. Increasing the braiding angle can increase the flexibility of the metal mesh sleeve and reduce the wear of the corrugated pipe caused by the relative movement between the corrugated pipe and the mesh sleeve. Setting the braiding angle of the soft metal mesh sleeve to be actively adjustable is more in line with actual use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the wear-resistant metal hose with adjustable braided angle soft metal mesh sleeve according to the present invention.

[0020] Figure 2 This is a schematic diagram of the connector;

[0021] Figure 3 This is a schematic diagram of the inside of the connector;

[0022] Figure 4 Left view of the inside of the connector;

[0023] Figure 5 This is a schematic diagram of the structure in which one of the metal wires mates with the connector;

[0024] Figure 6 for Figure 5 Enlarged structural diagram within the Chinese frame;

[0025] Figure 7 This is a schematic diagram of the metal wire and barb structure;

[0026] Figure 8 This is an enlarged schematic diagram of the metal wire and the slot in combination;

[0027] Figure 9 for Figure 5 Cross-sectional view;

[0028] Figure 10 A schematic diagram of the assembly structure of the soft metal mesh sleeve, wear-resistant layer, and corrugated pipe;

[0029] Figure 11 Schematic diagram of a soft metal mesh sleeve;

[0030] Figure 12 This is a schematic diagram of the S-shaped installation of a metal flexible hose. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings.

[0032] like Figure 1-9 As shown, the present invention provides an adjustable braided angle soft metal mesh sleeve anti-wear metal hose, including a butt-welded flange 1, a connector 2, a soft metal mesh sleeve 3, a wear-resistant layer 4, and a bellows 5. The two ends of the bellows 5 are respectively connected to the flange 1 via the connector 2, and the outer wall of the bellows 5 is fitted with the soft metal mesh sleeve 3; the wear-resistant layer 4 is provided between the soft metal mesh sleeve 3 and the bellows 5. The connector 2 includes a connecting pipe 21 connected between the flange 1 and the bellows 5. The outer wall of the connecting pipe 21 is fitted with a first branch pipe 22 that can rotate along the outer periphery of the connecting pipe 21 with external vibration. The first branch pipe 22 is provided with a movable part 23 that can move linearly towards the flange 1 with the rotation of the first branch pipe 22. The movable part 23 is connected to the end of the metal wire 31 at the end of the soft metal mesh sleeve 3 for pulling the metal wire 31. The end of the metal wire 31 connected to the movable part 23 is provided with pitch positions along the length of the metal wire that correspond to the pitch of the braided strands of the soft metal mesh sleeve 3. A locking part is also provided to limit the pitch positions to prevent the metal wire from resetting after moving with the movable part.

[0033] In this embodiment, the first branch pipe 22 is a lead screw, specifically a ball screw; the movable part 23 is a nut, specifically a ball nut. The ball screw is sleeved on the outside of the connecting pipe 21 and can rotate around the outer circumference of the connecting pipe 21. A ball nut is sleeved on the outside of the ball screw and can move linearly from one end of the ball screw to the other end of the ball screw as the ball screw rotates. In this embodiment, the ball nut has an internal thread, and the outer surface of the ball screw has an external thread that mates with the internal thread of the ball nut. Through the mating of the internal and external threads, the rotational motion of the ball screw is converted into the linear motion of the ball nut. In this embodiment, the internal thread of the ball nut contains balls, which can convert the sliding friction between the ball screw and the ball nut during relative motion into rolling friction, thereby reducing friction.

[0034] In this embodiment, the ball nut is fixedly connected to the metal wire 31 at the end of the soft metal mesh sleeve 3, and is used to drive the metal wire 31 to move linearly. In this embodiment, the ball nut is argon arc welded to the soft metal mesh sleeve 3 on the side closest to the soft metal mesh sleeve 3 to ensure that the ball nut can drive the metal wire 31 of the soft metal mesh sleeve 3 to move linearly.

[0035] In this embodiment, a sleeve is fitted on the outer side of the first branch pipe, and the movable part is located inside the sleeve. The inner wall of the sleeve is provided with a guide rail to facilitate the movable part to move in a linear motion trajectory toward the flange. The ball nut in this embodiment is provided with a groove corresponding to the rail so that it can slide in the rail. One end of the sleeve is fixed to the pipe by a connector 25. The connector 25 and the sleeve 24 are nested to form an annular gap 27 for the movable part to drive the metal wire through. The other end of the sleeve is provided with a baffle 26 for limiting the movable part 23 and preventing the movable part from moving out of the sleeve.

[0036] One side of the connector 25 is welded to the pipe 21 and the bellows, and the other side is welded to the sleeve 24 to fix the guide rail. In this embodiment, the pipe 21 near the bellows is sequentially welded to the bellows 5 and the connector 25 by argon arc welding, and the pipe 21 near the welding flange is welded to the welding flange 1 by argon arc welding to ensure the sealing of the metal hose.

[0037] The annular gap 27 formed between the connector 25 and the sleeve 24 has a chamfered edge. The pitch position of the metal wire has a protrusion that can fix the pitch position within the annular gap when the moving part moves away from the flange. This protrusion is a barb, and the direction of the barb can form a self-locking mechanism with the chamfer. That is, the barb can be locked within the annular gap, thereby preventing the metal wire from moving towards the soft metal mesh sleeve 3, i.e., preventing the metal wire 31 from moving in the opposite direction. Figure 5-9 As shown. In this embodiment, the position of the barbs is set regularly according to the pitch, and different barbs 32 correspond to different weaving angles.

[0038] The relationship between the pitch of the metal wire 31 in the soft metal mesh sleeve 3 and the braiding angle is as follows:

[0039]

[0040] In the formula, R e P is the nominal radius of the braided mesh sleeve, P is the pitch of the braided strands, and α is the braiding angle of the metal mesh sleeve. Therefore, when the pitch of the metal wires 31 in the soft metal mesh sleeve 3 decreases, the braiding angle increases accordingly. The hardness of the braided layer under the cold drawing process is much higher than that of the corrugated pipe. Using a large braiding angle to increase the flexibility of the metal mesh sleeve can reduce the wear of the corrugated pipe caused by the relative movement between the corrugated pipe and the mesh sleeve.

[0041] In practical applications, firstly, based on the variation range of the braiding angle of the flexible metal mesh sleeve, the pitch corresponding to each braiding angle is calculated. The braiding angle of the woven flexible metal mesh sleeve is taken as the minimum braiding angle, and the maximum braiding angle that the metal wire can reach after being stretched is set. Within the range of the minimum and maximum braiding angles, the pitch corresponding to each angle is calculated. Specifically, every 5° can be used as a unit of variation; for example, a braiding angle of 5° corresponds to one pitch, a braiding angle of 10° corresponds to one pitch, and so on. Then, along the length direction of the metal wire, the pitch is calculated according to each… The screw pitch is set at a specific pitch position, with the metal wire pitch at its maximum when the moving part reaches its farthest distance. Barbs are provided at each pitch position. This ensures that when the moving part drives the metal wire towards the flange (i.e., away from the flexible metal mesh), the barbs do not impede the wire's movement. However, when the wire moves in the opposite direction (towards the flexible metal mesh), the barbs can engage with the chamfered positions on the annular gaps, thus fixing the wire in place after movement. Each barb position corresponds to a braiding angle, and barbs can be provided on both sides of the metal wire. Therefore, under the influence of external vibration, the wear-resistant metal hose of this invention experiences changes in the screw pitch due to the movement of the metal wire, which in turn changes the braiding angle, ultimately improving the flexibility of the metal mesh and increasing its wear resistance.

[0042] In this embodiment, the soft metal mesh sleeve 3 is made of 16Cr23Ni13; the use of soft metal materials can reduce the wear of the bellows 5. The wear-resistant layer 4 is a composite material target plate molded from aramid woven fabric and thermoplastic polycarbonate matrix, which can effectively reduce the wear of the bellows 5; Figure 10-12 As shown, when the metal hose is installed in an S-shape, the corrugated pipe of the metal hose will wear against the metal mesh sleeve, which will lead to the failure of the metal hose. Adding the wear-resistant layer 4 can effectively reduce the wear of the corrugated pipe.

[0043] Working principle: When an external force drives the ball screw to rotate, the ball screw, through the balls and threads, drives the ball nut to translate. The metal wires 31 of the soft metal mesh sleeve are welded to one side of the ball nut. The ball nut drives the metal wires 31 to translate, reducing the pitch of the metal wires 31 and increasing the braiding angle. The ends of the metal wires 31 are provided with barbs 32 corresponding to different braiding angles. The barbs 32 engage with the grooves 27 to create a self-locking mechanism, thereby adjusting the braiding angle. Simultaneously, by designing the braided layer and reducing the hardness of the metal mesh braiding material, the wear and failure problem of metal hoses is solved quickly, cost-effectively, and conveniently from a structural perspective.

Claims

1. A wear-resistant metal hose with an adjustable braided angle soft metal mesh sleeve, comprising a flange (1), a connector (2), a soft metal mesh sleeve (3), and a bellows (5); both ends of the bellows are connected to the flange (1) via the connector (2), and the outer wall of the bellows is fitted with a soft metal mesh sleeve (3); characterized in that, The connector (2) includes a connecting pipe (21) that connects the flange and the bellows. A first branch pipe (22) is sleeved on the outside of the connecting pipe and can rotate along the outer periphery of the connecting pipe (21) with external vibration. The first branch pipe is provided with a movable part (23) that can move towards the flange with the rotation of the first branch pipe (22). The movable part (23) is connected to the metal wire (31) in the soft metal mesh sleeve (3) to drive the metal wire (31) to move. The end of the metal wire (31) connected to the movable part (23) is provided with pitch positions along the length of the metal wire, which are spaced apart and correspond to the pitch of the braided strands of the soft metal mesh sleeve (3). A locking part is also provided to limit the pitch position to prevent the metal wire (31) from resetting after moving with the movable part (23).

2. The wear-resistant metal hose with an adjustable braided angle soft metal mesh sleeve according to claim 1, characterized in that, A sleeve (24) is fitted on the outside of the first branch pipe (22), and the movable part (23) is located inside the sleeve (24). The inner wall of the sleeve (24) is provided with a guide rail to facilitate the movable part (23) to move in a straight line towards the flange (1).

3. The wear-resistant metal hose with an adjustable braided angle soft metal mesh sleeve according to claim 2, characterized in that, One end of the sleeve (24) is fixed to the pipe (21) by a connector (25), and the connector (25) and the sleeve (24) are nested to form an annular gap (27) for the movable part to drive the metal wire through.

4. The wear-resistant metal hose with an adjustable braided angle soft metal mesh sleeve according to claim 3, characterized in that, The metal wire (31) has a protrusion (32) at the pitch position that can fix the pitch position in the annular gap when the moving part moves away from the flange.

5. The wear-resistant metal hose with an adjustable braided angle soft metal mesh sleeve according to claim 2, characterized in that, The other end of the sleeve (24) is provided with a baffle (26) for limiting the movable part (23) and preventing the movable part (23) from moving out of the sleeve.

6. The wear-resistant metal hose with an adjustable braided angle soft metal mesh sleeve according to claim 2, characterized in that, The outer wall of the first branch pipe (22) is provided with an external thread. The movable part (23) is sleeved on the outer wall of the first branch pipe (22) and is provided with an internal thread that matches the external thread of the first branch pipe (22). The movable part (23) moves linearly along the axial direction of the first branch pipe (22) due to the cooperation of the internal thread and the external thread.

7. The wear-resistant metal hose with an adjustable braided angle soft metal mesh sleeve according to claim 1, characterized in that, The first branch pipe (22) is a screw rod sleeved on the outer wall of the connecting pipe; the movable part (23) is a nut sleeved on the screw rod, and one end of the metal wire (31) is fixed on the circumference of the thread; the cooperation between the screw rod and the nut converts the circular motion of the screw rod into the linear motion of the nut.

8. The wear-resistant metal hose with an adjustable braided angle soft metal mesh sleeve according to claim 1, characterized in that, A ball bearing is provided between the first branch pipe (22) and the movable part (23) to reduce the friction between them.

9. The wear-resistant metal hose with an adjustable braided angle soft metal mesh sleeve according to claim 1, characterized in that, An anti-slip layer is provided between the first branch pipe (22) and the connecting pipe (21) to facilitate the rotation of the first branch pipe (22).

10. The wear-resistant metal hose with an adjustable braided angle soft metal mesh sleeve according to claim 1, characterized in that, A wear-resistant layer (4) is provided between the soft metal mesh sleeve (3) and the corrugated pipe (5).

Images