Wear-resistant metal hose with soft metal net sleeve with adjustable weaving angle

Abstract

The invention discloses a wear-resistant metal hose with a soft metal net sleeve with an adjustable weaving angle. The wear-resistant metal hose comprises flanges, connectors, the soft metal net sleeve and a corrugated pipe. The connectors comprise connecting pipes, the two ends of the corrugated pipe are connected with the flanges through the connectors respectively, and the outer wall of the corrugated pipe is sleeved with a soft metal net sleeve. The connector comprises a connecting flange and a connecting pipe of the corrugated pipe, the outer side of the connecting pipe is sleeved with a first branch pipe capable of rotating along the periphery of the connecting pipe along with external vibration, and a movable part capable of rotating along with the first branch pipe to move in the direction close to the flange is further arranged. The movable part is connected with the metal wire in the soft metal net sleeve and used for driving the metal wire to move; the end, connected with the movable part, of the metal wire is provided with thread pitch positions corresponding to the thread pitch of the woven plied yarn of the soft metal net sleeve at intervals and further provided with a locking part used for limiting the thread pitch positions. According to the metal hose, the weaving angle of the soft metal net sleeve can be actively adjusted, the sealing performance of the metal hose is improved, the flexibility of the metal net sleeve is improved, and abrasion of the corrugated pipe is reduced.

Description

Technical Field

[0001] The invention relates to a metal hose, in particular to an anti-wear metal hose with a soft metal mesh sleeve with adjustable braiding angle. Background Art

[0002] Metal hose is a connection and compensation device for pipelines. It is usually composed of butt-welded flanges, bellows, joints, and metal mesh sleeves. It has many excellent properties such as sealing, pressure resistance, high temperature resistance, corrosion resistance, and fatigue resistance, and has become an indispensable elastic element in modern engineering technology.

[0003] The working environment of metal hoses is usually harsh, and the vibration displacement in the connected parts is large. In some special application fields, when the metal hose is installed in an S-shape, the bellows of the metal hose will wear against the metal mesh sleeve, causing the metal hose to fail. Further research shows that the leakage mode of the metal hose is clearly the wear of the bellows and the braided layer. The hardness of the braided layer under the cold drawing process is much higher than that of the bellows, which increases the probability of this abnormality.

[0004] At present, the friction and wear between the corrugated pipe and the braided layer is generally avoided by adding a wear-resistant layer. However, the traditional wear-resistant layer is often made of materials such as asbestos cloth. The wear-resistant layer is thick and has poor wear-resistant effect under S-shaped installation conditions. Summary of the invention

[0005] Purpose of the invention: The purpose of the present invention is to provide a wear-resistant metal hose with a soft metal mesh sleeve with adjustable braiding angle, which is not prone to wear during S-shaped installation.

[0006] Technical solution: The wear-resistant metal hose with a soft metal mesh sleeve with adjustable braiding angle described in the present invention comprises a flange, a joint, a soft metal mesh sleeve, and a bellows; the two ends of the bellows are respectively connected to the flange through a joint, and the outer wall of the bellows is sleeved with a soft metal mesh sleeve; the joint comprises a connecting pipe connecting the flange and the bellows, the outer side of the connecting pipe is sleeved with a first branch pipe that can rotate along the outer periphery of the connecting pipe with external vibration, and the first branch pipe is provided with a movable part that can move toward 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 corresponding to the pitch of the soft metal mesh sleeve braided strands at intervals along the length direction of the metal wire, and is also provided with a locking part for limiting the pitch position to prevent the metal wire from resetting after moving with the movable part.

[0007] Wherein, a sleeve is sleeved on the outer side of the first branch pipe, the movable part is located in the sleeve, and a guide rail is provided on the inner wall of the sleeve to facilitate the movable part to move toward the flange along a linear motion trajectory.

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

[0009] Wherein, the pitch position of the metal wire is provided with a protrusion which can fix the pitch position in the annular gap when the movable part moves in a direction away from the flange.

[0010] Wherein, a baffle is provided at the other end of the sleeve for limiting the movable part and preventing the movable part from moving out of the sleeve.

[0011] The outer wall of the first branch pipe is provided with an external thread, the movable part is sleeved on the outer wall of the first branch pipe and provided with an internal thread matching the external thread of the first branch pipe, and the movable part moves linearly along the axial direction of the first branch pipe due to the matching of the internal thread and the external thread.

[0012] Among them, the first branch pipe is a screw rod sleeved on the outer wall of the connecting pipe; the movable part is a nut sleeved on the screw rod, and one end of the metal wire 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.

[0013] Wherein, a ball is provided between the first branch pipe and the movable part for reducing the friction between the two.

[0014] Wherein, an anti-skid layer is provided between the first branch pipe and the connecting pipe to facilitate the rotation of the first branch pipe.

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

[0016] The side of the connecting pipe close to the bellows is welded to the bellows and the connecting piece by argon arc welding, and the side of the connecting pipe close to the butt-welding flange is welded to the butt-welding flange by argon arc welding 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 tube caused by 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 to reduce the pitch of the metal wire and increase the braiding angle, thereby increasing the flexibility of the metal mesh sleeve and reducing the wear of the bellows caused by the relative movement of the bellows and the mesh sleeve; (2) 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 bellows 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 bellows. Increasing the braiding angle can increase the flexibility of the metal mesh sleeve and reduce the wear of the bellows caused by the relative movement of the bellows and the mesh sleeve. Setting the braiding angle of the soft metal mesh sleeve to be actively adjustable is more suitable for practical use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an overall schematic diagram of the wear-resistant metal hose with adjustable braiding angle soft metal mesh sleeve of the present invention;

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

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

[0022] Figure 4 This is the left side view of the inside of the joint;

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

[0024] Figure 6 for Figure 5 A schematic diagram of the enlarged structure in the middle box;

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

[0026] Figure 8 It is a schematic diagram of the enlarged structure of the matching of the metal wire and the card slot;

[0027] Fig. 9 for Figure 5 sectional view of;

[0028] Fig.10 This is a schematic diagram of the assembly structure of the soft metal mesh sleeve, wear-resistant layer and bellows;

[0029] Fig.11 It is a schematic diagram of a soft metal mesh sleeve;

[0030] Fig.12 This is a schematic diagram of the S-type installation of a metal hose. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0032] like Figure 1-9 As shown, the present invention provides an anti-wear metal hose with an adjustable braided angle soft metal mesh sleeve, comprising a butt-welded flange 1, a joint 2, a soft metal mesh sleeve 3, a wear-resistant layer 4, and a bellows 5. Both ends of the bellows 5 are connected to the flange 1 through the joint 2, and the outer wall of the bellows 5 is provided with a soft metal mesh sleeve 3; and a wear-resistant layer 4 is provided between the soft metal mesh sleeve 3 and the bellows 5. The joint 2 includes a connecting pipe 21 connected between the flange 1 and the bellows 5. The outer wall of the connecting pipe 21 is sleeved with a first branch pipe 22 that can rotate along the outer circumference of the connecting pipe 21 with external vibration. The first branch pipe 22 is provided with a movable part 23 that can make a linear motion toward the direction close to 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 corresponding to the pitch of the braided strands of the soft metal mesh sleeve 3 at intervals along the length direction of the metal wire, and is also provided with a locking part for limiting the pitch position to prevent the metal wire from resetting after moving with the movable part.

[0033] The first branch pipe 22 of this embodiment is a screw, specifically a ball screw; the movable part 23 of this embodiment is a nut, specifically a ball nut. The ball screw is sleeved on the outside of the pipe 21 and can make circular motion around the outer circumference of the pipe 21. The ball screw 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 with the circular motion of the ball screw; the ball nut of this embodiment is provided with an internal thread inside, and the outer surface of the ball screw is provided with an external thread that matches the internal thread of the ball nut; through the cooperation of the internal thread and the external thread, the circular motion of the ball screw is converted into the linear motion of the ball nut. The ball nut of this embodiment is provided with a ball inside the internal thread, and the ball can convert the sliding friction when the ball screw and the ball nut move relative to each other into rolling friction, thereby reducing the friction.

[0034] The ball nut of this embodiment 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. The ball nut of this embodiment is welded to the soft metal mesh sleeve 3 by argon arc welding on the side close to the soft metal mesh sleeve 3, ensuring that the ball nut can drive the metal wire 31 of the soft metal mesh sleeve 3 to move linearly.

[0035] A sleeve is sleeved on the outside of the first branch pipe of this embodiment, and the movable part is located in the sleeve. The inner wall of the sleeve is provided with a guide rail for the movable part to move toward the flange in a straight line motion trajectory; the ball nut of this embodiment is provided with a groove corresponding to the track so that it can slide in the track; one end of the sleeve is fixed to the connecting pipe by a connecting piece 25, and the connecting piece 25 and the sleeve 24 are nested to form an annular gap 27 for the movable part to drive the metal wire to pass through; the other end of the sleeve is provided with a baffle 26 for limiting the movable part 23 to prevent the movable part from moving out of the sleeve.

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

[0037] The edge of the annular gap 27 formed between the connecting member 25 and the sleeve 24 is provided with a chamfer, and the pitch position of the metal wire is provided with a protrusion that can fix the pitch position in the annular gap when the movable member moves away from the flange. The protrusion is a barb, and the direction of the barb is set to form a self-locking with the chamfer, that is, the barb can be stuck in the annular gap, thereby preventing the metal wire from moving in the direction close to the soft metal mesh sleeve 3, that is, avoiding the metal wire 31 from moving in the opposite direction, such as Figure 5-9 The positions of the barbs in this embodiment are regularly arranged according to the pitch, and different barbs 32 correspond to different braiding angles.

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

[0039]

[0040] In the formula, R e is the nominal radius of the braided mesh, P is the pitch of the braided strands, and α is the braiding angle of the metal mesh; therefore, when the pitch of the metal wire 31 in the soft metal mesh 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 bellows, and a large braiding angle is used to increase the flexibility of the metal mesh, which can reduce the wear of the bellows caused by the relative movement between the bellows and the mesh.

[0041] In practical applications, first, the pitch corresponding to each braiding angle is calculated according to the variation range of the braiding angle of the soft metal mesh sleeve, wherein the braiding angle of the braided soft metal mesh sleeve is used as the minimum braiding angle, and the maximum braiding angle that can be reached after the metal wire is stretched is set. Within the range of the minimum braiding angle and the maximum braiding angle, the pitch corresponding to each angle is calculated. Specifically, every 5° can be used as a variation unit. For example, a braiding angle of 5° corresponds to a pitch, a braiding angle of 10° corresponds to a pitch, and so on. At the end of the metal wire, according to each pitch along the length direction, The pitch is set at a pitch position, and when the movable part moves to the farthest distance, the pitch of the metal wire is the largest; barbs are set at each pitch position, so that when the movable part drives the metal wire to move toward the flange, that is, to move away from the soft metal mesh sleeve, the barbs will not hinder the movement of the metal wire, but when the metal wire moves in the opposite direction, that is, moves toward the soft metal mesh sleeve, the barbs on the metal wire can be stuck in the chamfered position on the annular gap, so that the metal wire is fixed after moving; the position of each barb corresponds to a braiding angle, and barbs can be set on both sides of the metal wire. Therefore, when the wear-resistant metal hose of the present invention is affected by external force vibration, the metal wire moves to change the pitch, thereby changing the braiding angle, and ultimately improving the flexibility of the metal mesh sleeve, making it more wear-resistant.

[0042] The soft metal mesh sleeve 3 of this embodiment is made of 16Cr23Ni13; the use of soft metal materials can reduce the wear of the bellows 5. The wear-resistant layer 4 is made of a composite material target plate made by molding aramid braid 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 bellows of the metal hose will wear against the metal mesh sleeve, thereby causing the metal hose to fail. Adding a wear-resistant layer 4 can effectively reduce the wear of the bellows.

[0043] Working principle: When the external force drives the ball screw to move in a circular motion, the ball screw drives the ball nut to move in a translational motion through the ball and the thread. The metal wire 31 of the soft metal mesh sleeve is welded to one side of the ball nut. The ball nut drives the metal wire 31 to move in a translational motion. The pitch of the metal wire 31 of the soft metal mesh sleeve is reduced, and the braiding angle is increased. The end of the metal wire 31 is provided with barbs 32 corresponding to different braiding angles. The barbs 32 cooperate with the slot 27 to produce self-locking, thereby completing the adjustment of the braiding angle. At the same time, by designing the braided layer and reducing the hardness of the metal mesh sleeve braiding material, the wear and failure problem of the metal hose can be quickly, cheaply and conveniently solved from the structural level.

Claims

1. A wear-resistant metal hose with a soft metal mesh sleeve with adjustable braiding angle, comprising a flange (1), a joint (2), a soft metal mesh sleeve (3), and a bellows (5); the two ends of the bellows are respectively connected to the flange (1) through the joint (2), and the outer wall of the bellows is provided with a soft metal mesh sleeve (3); characterized in that: The joint (2) comprises a connecting pipe (21) connecting a flange and a bellows, a first branch pipe (22) being sleeved on the outer side of the connecting pipe and being able to rotate along the outer circumference of the connecting pipe (21) in response to external vibration, and a movable part (23) being movable in a direction close to the flange in response to the rotation of the first branch pipe (22); the movable part (23) being connected to a metal wire (31) in the soft metal mesh sleeve (3) for driving the metal wire (31) to move; and pitch positions corresponding to the pitch of the braided strands of the soft metal mesh sleeve (3) being arranged at intervals along the length direction of the metal wire at one end of the metal wire (31) connected to the movable part (23), and a locking part being provided for limiting the pitch position to prevent the metal wire (31) from being reset after moving with the movable part (23).

2. The wear-resistant metal hose with adjustable braiding angle soft metal mesh sleeve according to claim 1, characterized in that: A sleeve (24) is sleeved on the outside of the first branch pipe (22), the movable part (23) is located in the sleeve (24), and the inner wall of the sleeve (24) is provided with a guide rail for facilitating the movable part (23) to move toward the flange (1) along a linear motion trajectory.

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

4. The wear-resistant metal hose with adjustable braiding angle soft metal mesh sleeve according to claim 3, characterized in that: The pitch position of the metal wire (31) is provided with a protrusion (32) which can fix the pitch position in the annular gap when the movable part moves in a direction away from the flange.

5. The wear-resistant metal hose with adjustable braiding 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 position of the movable part (23) and preventing the movable part (23) from moving out of the sleeve.

6. The wear-resistant metal hose with adjustable braiding 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), and the movable part (23) moves linearly along the axial direction of the first branch pipe (22) due to the matching of the internal thread and the external thread.

7. The wear-resistant metal hose with adjustable braiding 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 screw rod and the nut cooperate to convert the circular motion of the screw rod into the linear motion of the nut.

8. The wear-resistant metal hose with adjustable braiding 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 member (23) to reduce the friction between the two.

9. The wear-resistant metal hose with adjustable braiding 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 adjustable braiding 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).

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