A hydraulic hose with internal and external tensile strength

Abstract

This invention relates to the field of hydraulic pipe technology, specifically to a hydraulic pipe with internal and external tensile strength. The hydraulic pipe body contains a tensile component that adapts to variable loads and changes its shape. The tensile component is equipped with a pressure-reducing component that changes fluid flow rate by utilizing the deformation of the tensile component. This invention addresses the problem of how to achieve tensile protection of the inner and outer rubber layers of a hydraulic pipe during use.

Description

Technical Field

[0001] This invention relates to the field of hydraulic pipe technology, specifically to a hydraulic pipe with internal and external tensile strength. Background Technology

[0002] Hydraulic pipes are pipelines used to transport hydraulic media. They are characterized by high pressure, high temperature, high strength, corrosion resistance, and wear resistance. Hydraulic pipes can be connected in various ways, such as flange connection, compression fitting connection, threaded connection, and quick coupling. Different connection methods have different requirements for the sealing performance and disassembly of hydraulic pipes.

[0003] During the use of large equipment, the diameter of hydraulic pipes will continue to increase with different needs. In order to optimize the design and achieve the minimum pressure loss, it is equally important to select the correct hydraulic pipe and hydraulic valve block connection. The hydraulic pipe needs to have the appropriate diameter, length, smoothness and shape to adapt to the hydraulic flow requirements. Hydraulic pipes that are too small will cause turbulence and overheating, while hydraulic pipes that are too large will increase the cost of the system.

[0004] However, after prolonged use, the inner layer of the hydraulic hose may crack due to the impact of the fluid at different speeds and the corrosive nature of the fluid itself. Because of the outer layer, the damage to the inner layer cannot be detected, and the outer layer leaks after being impacted and corroded by the fluid. At the same time, the hydraulic hose may be twisted during installation and use. Since the connection with the outlet is directly connected to the outer layer, the fluid is prone to backflow when the fluid is shut off. This backflow will impact the connection and cause the outer layer of the hydraulic hose and the connector to stretch, which can easily damage the outer layer.

[0005] In existing technologies, the tensile strength of the inner and outer layers is addressed through several methods: controlling pressure and temperature, keeping the oil clean, selecting appropriate sealing devices, and conducting regular inspections. However, these methods also involve replacing hydraulic pipes and do not provide protection for the tensile strength of the inner and outer layers during the use of hydraulic pipes.

[0006] To address the aforementioned issues, a hydraulic pipe with internal and external tensile strength is designed. Summary of the Invention

[0007] This invention provides a hydraulic pipe with inner and outer rubber layers that resist tensile stress. By adaptively varying the load and changing its own shape to control the fluid flow rate, it controls the pressure of the inner and outer rubber layers of the hydraulic pipe, thus solving the problem of how to achieve tensile protection of the inner and outer rubber layers during the use of the hydraulic pipe.

[0008] The technical solution of the present invention is: a hydraulic pipe with internal and external tensile strength, including a hydraulic pipe body. In the process of large equipment requiring large flow conduction, a hydraulic pipe with a large diameter is required. Therefore, in actual use, the diameter of the hydraulic pipe body can be selected based on actual production needs, which facilitates the installation of other components.

[0009] The hydraulic tube body consists of an inner rubber layer, a middle rubber layer, a reinforcing layer, and an outer rubber layer from the inside out. It also includes a tensile component and a pressure reducing component. The hydraulic tube is equipped with a tensile component that adapts to variable loads and changes its own shape. The tensile component is equipped with a pressure reducing component that changes the fluid flow rate by utilizing the deformation of the tensile component.

[0010] When the inner rubber layer of the tensile component is damaged, the originally taut area at the top of the inner rubber layer is released from its restraint. It adapts to the variable load of the inner rubber layer, and the tensile component itself also changes. This change reduces the pressure on the inner rubber layer, thereby increasing its tensile strength. When the outer rubber layer is damaged, the originally taut area at the top of the outer rubber layer is released from its restraint. Similarly, based on the variable load of the outer rubber layer, the tensile component works in the opposite direction, thereby driving the pressure reducing component to increase the fluid flow in the opposite way. This increases the internal pressure, achieving balance with the external pressure, and thus improving the tensile strength of the outer rubber layer of the hydraulic pipe.

[0011] Preferably, the tensile component includes steel wires, pull rings, mounting holes, fixing pins, support rods, inner convex rings, and outer convex rings. Multiple steel wires are wound around the reinforcing layer to automatically change their shape with load variations. This allows them to assist the pressure-reducing component by changing their shape, thereby altering the fluid flow rate within the hydraulic pipe and achieving a tensile effect. The wound steel wires form a tensile-resistant circular mesh structure with a rhombus shape that increases the moment of inertia and improves tensile strength. The instability of the rhombus enhances the deformation effect of the steel wires and enables rapid return to their original position. When the steel wires deform, the included angle of the rhombus decreases, the moment of inertia decreases, and the tensile strength increases. This allows the steel wires to assist the reinforcing layer in improving the tensile strength of the hydraulic pipe. The steel wires are fixedly connected to pull rings to prevent damage to the hydraulic pipe in conjunction with the pressure-reducing component. This allows the steel wires to move the pressure-reducing component when stretched, increasing or decreasing the hydraulic pipe's capacity. The fluid flow rate within the body improves the working effect of the steel wire. There are two pull rings, which are arranged symmetrically at both ends of the support rod with the axis of the support rod as the axis. The upper ends of the inner rubber layer, middle rubber layer, and outer rubber layer are provided with mounting holes. The mounting holes are blind holes. The mounting holes are located at one end of the hydraulic tube body, with the center of the mounting hole located at the center of the middle rubber layer. The end of the mounting hole near the inner rubber layer is located at the center of the inner rubber layer, and the end of the mounting hole near the outer rubber layer is located at the center of the outer rubber layer. This balances the load between the inner and outer rubber layers and uses the load change of the inner or outer rubber layer to assist the pressure reduction component in achieving tensile strength of the hydraulic tube body. A fixing pin is provided in the mounting hole. The fixing pin is located at the center of the mounting hole and is inserted into the hose connector. This reduces the damage to the middle rubber layer when the hole is opened and prevents the tensile strength of the middle rubber layer from decreasing. The fixing pin is hinged to a support rod for distributing the tension at both ends of the fixing pin.

[0012] Pull rings and support rods are circumferentially arrayed within the hydraulic tube body, with an even number of pull rings and support rods symmetrically distributed to achieve multi-point tensile resistance. The number of pull rings and support rods is set to eight. Too few pull rings and support rods would be insufficient to accommodate the complex circumferential variable loads on the hydraulic tube body, while too many would lead to insufficient strength of the hydraulic tube body and increase unnecessary processing costs. An inner convex ring is fixedly connected to the end of the support rod near the inner rubber layer, allowing the tensile load on the inner rubber layer to be transferred to the inner convex ring via the pull ring. This assists the support rod in transferring the load to the outer convex ring, thereby assisting the pressure-reducing assembly and reducing the load on the hydraulic tube. An outer convex ring is fixedly connected to the end of the support rod near the outer rubber layer, changing its own load based on the movement of the inner convex ring and pull ring. The outer and inner convex rings assist each other through the support rod, reducing the load on the hydraulic tube body. The fixed pin hinge has a support rod for balancing the load on the outer and inner convex rings. The rotation center of the support rod is at the center of mass of the support rod. The length of the support rod is less than the sum of the diameter and length of the mounting hole, but greater than the diameter of the mounting hole. If the support rod is too long, it will collide with the inner and outer rubber layers during rotation, thus reducing the tensile strength of the pressure-reducing assembly. If the support rod is too short, it cannot connect with the inner and outer convex rings, and a short support rod will reduce the torque transmission capacity and the load transmission path, thereby reducing the protective effect.

[0013] When the outer rubber layer is under tension, the steel wire moves away from the hose connector, reducing the angle of the rhombus formed by the wires and increasing tensile strength. The steel wire drives the pull ring to move away from the hose connector, transferring the tension of the steel wire to the outer convex ring, thus assisting the steel wire and improving the tensile strength of the hydraulic pipe body. When the outer rubber layer is under excessive tension and is about to break, the direction of the tension on the outer convex ring changes, causing the outer convex ring to move closer to the hose connector. This drives the pressure reducing component, increasing the flow rate of the fluid in the hydraulic pipe body. When the fluid pressure in the pipe increases, the increased pressure is transferred to the outer rubber layer, subjecting it to greater tension and further increasing its tensile strength. The outer convex ring drives the support rod to swing around the fixed pin, and the support rod drives the inner convex ring to move away from the hose connector, thus assisting the outer convex ring in driving the pressure reducing component and further increasing the flow rate of the fluid in the hydraulic pipe body.

[0014] When the inner rubber layer is under tension, the steel wire moves away from the hose connector and reduces the angle of the rhombus formed by the steel wires, increasing the tensile strength. The steel wire drives the pull ring to move away from the hose connector, and the pull ring transfers the tension of the steel wire to the inner convex ring, thereby assisting the steel wire in its work and improving the tensile strength of the hydraulic pipe body. When the inner rubber layer is about to break under tension, the direction of the tension on the inner convex ring changes, and the inner convex ring moves closer to the hose connector, causing the pressure reducing component to work in the opposite direction, reducing the flow rate of the liquid in the hydraulic pipe body. When the fluid pressure in the pipe decreases, when the liquid flow rate is large, the liquid has a high flow velocity and strong impact force, increasing the stress on the inner rubber layer, resulting in a decrease in the tensile strength of the inner rubber layer. Therefore, reducing the flow rate in the hydraulic pipe helps to improve the tensile strength of the inner rubber layer. The inner convex ring drives the support rod to swing, and the outer convex ring moves away from the hose connector. Then, through the opposite movement of the outer and inner convex rings and the work of the pressure reducing component, the flow rate of the liquid in the hydraulic pipe body is further reduced.

[0015] Preferably, the pressure-reducing assembly includes a fixed plate, a through hole, a limiting ring, a main shaft, an arc groove, a rotating sleeve, a driving gear, a support block, a limiting pin, a moving plate, a driven gear, and a flow-limiting hole. One end of the hose connector is fixedly connected to the fixed plate, which has a through hole. This allows the liquid inside the hydraulic pipe to flow out through the through hole, ensuring the normal operation of the hydraulic pipe while utilizing the pressure of the liquid flowing within the pipe to improve its tensile strength. A limiting ring is fixedly connected to the edge of the fixed plate to position and install the limiting ring, preventing it from causing the fixed plate to move. The movement causes a change in the flow rate within the hydraulic tube. A main shaft is fitted with a clearance fit inside the limiting ring. An arc-shaped groove is opened on the surface of the main shaft. A rotating sleeve is slidably connected inside the arc-shaped groove. This sleeve is used to protect the hydraulic tube body through multi-degree-of-freedom movement in conjunction with the tensile component. The clearance fit between the main shaft and the limiting ring prevents the main shaft from colliding with the fixed plate, which reduces the flow restriction effect of the fixed plate on the hydraulic tube body. The rotating sleeve is driven by the arc-shaped groove on the surface of the main shaft. During the movement of the rotating sleeve, it rotates around the axis of the main shaft, thereby enabling the tension to be transmitted from the steel wire to the pressure reducing component and providing power to the pressure reducing component.

[0016] The rotating sleeve is fixedly connected to a limiting pin that enhances the connection between the rotating sleeve and the main shaft through a self-locking effect. A driving gear is fixedly connected to the outside of the rotating sleeve, allowing the driving gear to transmit the torque of the rotating sleeve around the main shaft axis to the driven gear. A support block is fixedly connected to the end of the rotating sleeve away from the limiting ring, allowing the support block to support the driving gear and move with the rotating sleeve. A moving plate is fixedly connected to the rotating sleeve to change its position relative to the main shaft by changing the shape of the steel wire. The steel wire, through the combined action of a pull ring, inner protrusion, and outer protrusion, enables the rotating sleeve to move synchronously with the shape change of the steel wire, thereby changing its position relative to the main shaft. A driven gear is fixedly connected to the moving plate, meshing with the driving gear. A flow-limiting orifice is provided on the moving plate to change the load on the tensile component by controlling the flow rate. The flow-limiting orifice cooperates with the through hole. When the flow-limiting orifice and the through hole are completely aligned, the flow rate inside the hydraulic pipe is at its maximum; when the flow-limiting orifice and the through hole are completely misaligned, the flow rate inside the hydraulic pipe is at its minimum.

[0017] When the steel wire is subjected to tension and changes its shape, the steel wire drives the pull ring to move, which in turn drives the rotating sleeve to move along the arc-shaped groove opened on the main shaft. The arc-shaped groove helps the rotating sleeve to convert the linear motion along the main shaft into rotational motion around the main shaft axis. The rotation of the rotating sleeve drives the drive gear to rotate, and the drive gear drives the driven gear to rotate, which in turn drives the moving plate to rotate around its own axis. This causes the axis positions of the through hole and the flow-limiting hole to change from completely coinciding to completely staggered, thereby changing the flow rate of the liquid in the hydraulic pipe, thus assisting the tensile component to work and improving the tensile strength of the hydraulic pipe.

[0018] When the valve closes rapidly, the high-pressure fluid in the hydraulic pipe flows back quickly. At this time, the hydraulic oil drives the steel wire to move, and the steel wire changes its shape to initially buffer the hydraulic oil. Due to the change in the shape of the steel wire, the steel wire drives the rotating sleeve to move along the arc-shaped groove opened on the main shaft through the pull ring, repeating the above working process. At this time, the fluid flow rate in the hydraulic pipe decreases, thereby achieving secondary protection for hydraulic control components such as valves.

[0019] Preferably, the through holes and the flow-limiting holes used to prevent damage to the hydraulic control components are arranged radially alternately along the fixed plate and the moving plate. Compared with the structure in which the flow-limiting holes and through holes are arranged in the same direction, when the moving disc moves with the rotating sleeve, only a small rotation angle is needed to make the axes of the through holes and the flow-limiting holes completely aligned, thereby increasing the flow rate of the hydraulic pipe body.

[0020] Preferably, the limiting pin is a tapered pin with a taper of 1:50, which is set according to GB / T 117-2000. The bottom of the rotating sleeve is fixedly connected with a limiting pin to improve the stability of the fit between the spindle and the rotating sleeve by utilizing its self-locking characteristic. When the tapered pin is inserted into the matching tapered hole in the rotating sleeve, the inclined surface of the tapered pin head will engage with the inclined surface of the tapered hole, generating friction. When the radial force generated by the rotating sleeve acts on the tapered pin, and it is about to cause the tapered pin to slip, the friction increases, thereby increasing the fastening force between the tapered pin and the tapered hole. At the same time, the friction between the tapered pin and the tapered hole on the rotating sleeve helps to improve the fit between the limiting ring and the spindle, thereby preventing the spindle from pushing the moving plate and causing the axis of the flow limiting hole and the through hole to not be completely aligned, reducing the maximum flow of the hydraulic pipe body, and causing the tensile strength of the hydraulic pipe body to decrease.

[0021] The beneficial effects of this invention are as follows:

[0022] 1. The present invention provides a hydraulic pipe with internal and external tensile strength. The device combines adaptive variable load with self-controlled liquid flow rate, and then utilizes the cooperation of tensile and pressure reducing components to control the liquid flow rate while the tensile component changes its own structure. In this way, the tensile strength of the inner and outer rubber layers is changed to achieve the effect of internal and external tensile strength of the hydraulic pipe.

[0023] 2. The present invention provides an internally and externally tensile-resistant hydraulic pipe. This device utilizes multi-point symmetrically distributed tensile-resistant components, and then utilizes the combined action of multiple parts of the tensile-resistant components to synchronously share the tensile force on the hydraulic pipe body. It also diversifies the angle of the tensile-resistant components to increase the moment of inertia, thereby enhancing the effect of the reinforcing layer and improving the tensile resistance of the hydraulic pipe body.

[0024] 3. The present invention provides an internally and externally tensile-resistant hydraulic pipe. This device achieves multiple movements synchronously through highly reliable multi-degree-of-freedom motion and utilizes a pressure-reducing component to synchronously switch the shape of the pressure-reducing component itself, thereby changing the flow rate through the pressure-reducing component and protecting hydraulic control components such as valves. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Obviously, those skilled in the art can obtain other drawings based on these drawings without any inventive effort:

[0026] Figure 1 This is a schematic diagram of the overall appearance of the present invention;

[0027] Figure 2 This is a cross-sectional view of the present invention;

[0028] Figure 3 This is the present invention. Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 This is the present invention. Figure 2 Enlarged view of point B in the middle;

[0030] Figure 5 This is a schematic diagram of the overall appearance of the tensile component and the pressure-reducing component of the present invention;

[0031] Figure 6 This is a top view of the pressure-reducing component of the present invention;

[0032] Figure 7 This is a cross-sectional view of the CC section of the present invention;

[0033] Figure 8 These are illustrations of two different working states of the pressure-reducing component of the present invention;

[0034] In the diagram: 1. Hydraulic pipe body; 11. Inner rubber layer; 12. Middle rubber layer; 13. Reinforcing layer; 14. Outer rubber layer; 15. Hose connector; 2. Tensile component; 21. Steel wire; 22. Pull ring; 23. Mounting hole; 24. Support rod; 25. Fixing pin; 26. Inner convex ring; 27. Outer convex ring; 3. Pressure reducing component; 31. Fixing plate; 32. Through hole; 33. Limiting ring; 34. Main shaft; 35. Arc groove; 36. Rotating sleeve; 361. Drive gear; 362. Support block; 37. Limiting pin; 38. Moving plate; 381. Driven gear; 39. Flow limiting hole. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] like Figures 1 to 3 As shown, a hydraulic pipe with internal and external tensile strength includes a hydraulic pipe body 1. In the process of large equipment requiring large flow conduction, a hydraulic pipe with a large diameter is required. Therefore, in actual use, the diameter of the hydraulic pipe body 1 can be selected based on actual production needs, which facilitates the installation of other components.

[0037] The hydraulic hose body 1 consists of an inner rubber layer 11, a middle rubber layer 12, a reinforcing layer 13, and an outer rubber layer 14, arranged from the inside out. The inner rubber layer 11 allows the conveyed medium to withstand pressure while protecting the steel wire 21 from corrosion. The outer rubber layer 14 protects the steel wire 21 from damage. The reinforcing layer 13 is a skeleton material that provides reinforcement. It also includes a tensile component 2 and a pressure-reducing component 3. The tensile component 2 is installed inside the hydraulic hose and adapts to the variable load by changing its shape. The pressure-reducing component 3 is installed on the tensile component 2 to change the fluid flow rate by utilizing the deformation of the tensile component 2. When the inner rubber layer 11 is damaged, the originally taut area at the upper end of the tensile component 2 is released from its restraint. It adapts to the variable load of the inner rubber layer 11, and the tensile component 2 itself also undergoes a certain change. This change reduces the pressure on the inner rubber layer 11, thereby increasing the tensile strength of the inner rubber layer 11. At the same time, it causes the middle rubber layer 12 and the reinforcing layer 13 to deform, thereby utilizing the different properties of the reinforcing layer 13 after deformation to improve the tensile strength of the entire hydraulic hose.

[0038] When the outer rubber layer 14 is damaged, the area at the upper end of the outer rubber layer 14 that was originally taut is released from the restriction. Similarly, based on the variable load of the outer rubber layer 14, the tensile component 2 works in the opposite direction, thereby driving the pressure reducing component 3 to increase the fluid flow in the opposite way, thereby increasing the internal pressure and achieving balance with the external pressure, thereby improving the tensile strength of the hydraulic pipe outer rubber layer 14, further preventing the hydraulic pipe outer rubber layer 14 from breaking. At the same time, the staff can know the actual condition of the hydraulic pipe based on the sudden increase in flow rate and decide whether it needs to be repaired or replaced.

[0039] In existing technologies, damage to the outer rubber layer 14 of the hydraulic pipe is often avoided by adding a protective sleeve or cable chain to the hydraulic pipe. However, the impact of rapid impact and backflow of internal fluid on the inner rubber layer 11 and the outer rubber layer 14 of the hydraulic pipe is not considered. This application adopts the cooperation of tensile component 2 and pressure reducing component 3, and uses the slight changes in the outer rubber layer 14 or the inner rubber layer 11 to affect the tensile component 2. In turn, the tensile component 2 drives the pressure reducing component 3 to achieve the balance of internal and external pressure of the hydraulic pipe and improve the tensile strength of the hydraulic pipe.

[0040] like Figures 1 to 4As shown, multiple steel wires 21 are wound around the reinforcing layer 13 to automatically change their shape with load changes. This allows them to assist the pressure-reducing component 3 in working by changing their shape, thereby changing the fluid flow rate in the hydraulic pipe body 1 and achieving a tensile resistance effect. After being wound, the steel wires 21 form a tensile-resistant circular mesh structure with a rhombus shape that increases the moment of inertia and improves tensile strength. The instability of the rhombus shape is utilized to improve the deformation effect of the steel wires 21 and achieve rapid return of the steel wires 21. When the steel wires 21 deform, the included angle of the rhombus decreases. Based on the meaning and calculation formula of moment of inertia, it can be concluded that the moment of inertia decreases as the included angle of the rhombus decreases. A decrease in moment of inertia leads to an increase in tensile strength, thereby improving the tensile strength of the hydraulic pipe body 1 through the auxiliary reinforcing layer 13 of steel wire 21. Steel wire 21 is glued to a pull ring 22 for use with the pressure-reducing assembly 3 to prevent damage to the hydraulic pipe. The pull ring 22 transmits power to the pressure-reducing assembly 3 through the deformation of steel wire 21 via a pin connection. This allows the pressure-reducing assembly 3 to move when steel wire 21 is stretched, increasing or decreasing the internal pressure of the hydraulic pipe body 1. To improve the working effect of the steel wire 21, the liquid flow rate is increased. There are two pull rings 22, arranged symmetrically at both ends of the support rod 24 with the axis of the support rod 24 as the axis. Mounting holes 23 are provided at the upper ends of the inner rubber layer 11, the middle rubber layer 12, and the outer rubber layer 14. The mounting holes 23 are blind holes, located at one end of the hydraulic pipe body 1. The center of the mounting hole 23 is located at the center of the middle rubber layer 12, and the end of the mounting hole 23 near the inner rubber layer 11 is located at the center of the inner rubber layer 11. The end of the mounting hole 23 near the outer rubber layer 14 is located at the center of the outer rubber layer 14. To balance the load between the inner rubber layer 11 and the outer rubber layer 14 and to assist the pressure reduction component 3 in achieving tensile strength resistance of the hydraulic pipe body 1 by utilizing the load changes of the inner rubber layer 11 or the outer rubber layer 14, a fixing pin 25 is provided in the mounting hole 23. The fixing pin 25 is located at the center of the mounting hole 23 and is inserted into the hose connector 15, thereby reducing the damage to the middle rubber layer 12 when the hole is opened and preventing the tensile strength of the middle rubber layer 12 from decreasing. The fixing pin 25 is hinged to a support rod 24 for distributing the tension at both ends of itself through the fixing pin 25.

[0041] Pull rings 22 and support rods 24 are arranged in a circumferential array inside the hydraulic pipe body 1. The number of pull rings 22 and support rods 24 is evenly distributed symmetrically, thereby achieving multi-point tensile resistance. The number of pull rings 22 and support rods 24 is set to 8, with each pull ring 22 and support rod 24 arranged at a 45° interval. When the hydraulic pipe is subjected to tension, the pull ring 22 closest to the tension point takes effect. The effect decreases as the distance of the pull ring 22 from the tension point increases. By distributing the force through multi-point distribution of pull rings 22 and support rods 24, the tensile strength of the hydraulic pipe is improved. If the number of pull rings 22 and support rods 24 is too small, it will be difficult to adapt to the complex circumferential variable load on the hydraulic pipe body 1; if the number of pull rings 22 and support rods 24 is too large, it will lead to insufficient strength of the hydraulic pipe body 1 and increase unnecessary processing costs. One end of the support rod 24 near the inner rubber layer 11 is pinned to an inner convex ring 26 to realize the tensile load on the inner rubber layer 11. The load is transmitted to the inner convex ring 26 through the pull ring 22. The inner convex ring 26 transmits its own force to the support rod 24, which in turn assists the support rod 24 in transmitting the load to the outer convex ring 27. The outer convex ring 27 transmits its own force to the pressure reducing assembly 3, thereby assisting the pressure reducing assembly 3 in its operation and reducing the load on the hydraulic pipe. The support rod 24 is pin-connected to the outer convex ring 27 near the outer rubber layer 14, which changes its own load based on the movement of the inner convex ring 26 and the pull ring 22 respectively. The outer convex ring 27 and the inner convex ring 26 assist each other through the action of the support rod 24. When the inner convex ring 26 is under force, the outer convex ring 27 receives a force in the opposite direction to that of the inner convex ring 26 due to the action of the support rod 24, thereby reducing the load on the hydraulic pipe body 1 by enhancing the working effect of the pressure reducing assembly 3. The fixed pin 25 is hinged to a support rod 24 for balancing the load on the outer convex ring 27 and the inner convex ring 26. The rotation center of the support rod 24 is at the center of mass of the support rod 24. The length of the support rod 24 is less than the sum of the diameter and length of the mounting hole 23, but greater than the diameter of the mounting hole 23. If the length of the support rod 24 is too long, it will collide with the inner rubber layer 11 and the outer rubber layer 14 during rotation, thereby reducing the tensile strength of the pressure reducing assembly 3. If the support rod 24 is too short, it cannot be connected to the inner convex ring 26 and the outer convex ring 27. In addition, if the support rod 24 is too short, the torque transmission capacity will decrease, the load transmission path will be reduced, and the protection effect will be reduced.

[0042] When the outer rubber layer 14 is subjected to tension, the steel wire 21 moves away from the hose connector 15 and reduces the rhomboid angle formed by the steel wires 21, thereby increasing the tensile strength. The steel wire 21 drives the pull ring 22 to move away from the hose connector 15. The pull ring 22 transmits the tension of the steel wire 21 to the outer convex ring 27, thereby assisting the steel wire 21 in its work and improving the tensile strength of the hydraulic pipe body 1. When the outer rubber layer 14 is subjected to excessive tension and is about to break, the direction of the tension on the outer convex ring 27 changes, and the outer convex ring 27 moves towards the hose connector 15, driving the pressure reducing component 3 to work and increasing the flow rate of the liquid in the hydraulic pipe body 1. When the fluid pressure in the pipe increases, the increased pressure is transmitted to the outer rubber layer 14, causing it to bear greater tension, thereby improving the tensile strength of the outer rubber layer 14. The outer convex ring 27 drives the support rod 24 to swing around the fixed pin 25. The support rod 24 drives the inner convex ring 26 to move away from the hose connector 15, thereby assisting the outer convex ring 27 in driving the pressure reducing assembly 3 to work, and further increasing the flow rate of liquid in the hydraulic pipe body 1.

[0043] When the inner rubber layer 11 is under tension, the steel wire 21 moves away from the hose connector 15, reducing the rhomboid angle formed by the steel wires 21 and increasing the tensile strength. The steel wire 21 drives the pull ring 22 to move away from the hose connector 15, and the pull ring 22 transmits the tension of the steel wire 21 to the inner convex ring 26, thereby assisting the steel wire 21 in its work and improving the tensile strength of the hydraulic pipe body 1. When the inner rubber layer 11 is about to break under tension, the direction of the tension on the inner convex ring 26 changes, and the inner convex ring 26 moves closer to the hose connector 15, causing the pressure reducing component 3 to work in the opposite direction and reducing the hydraulic pressure. The flow rate of the liquid inside the pipe body 1 is affected by the pressure of the fluid inside the pipe. When the flow rate of the liquid is large, the liquid has a high flow velocity and strong impact force, which increases the stress on the inner rubber layer 11 and causes the tensile strength of the inner rubber layer 11 to decrease. Therefore, reducing the flow rate in the hydraulic pipe is beneficial to improving the tensile strength of the inner rubber layer 11. The inner convex ring 26 drives the support rod 24 to swing, and then the outer convex ring 27 moves away from the hose connector 15. Then, through the opposite movement of the outer convex ring 27 and the inner convex ring 26, the flow rate of the liquid inside the hydraulic pipe body 1 is further reduced by the operation of the pressure reducing component 3.

[0044] like Figures 4 to 8As shown, the pressure-reducing assembly 3 includes a fixed plate 31, a through hole 32, a limiting ring 33, a main shaft 34, an arc groove 35, a rotating sleeve 36, a driving gear 361, a support block 362, a limiting pin 37, a moving plate 38, a driven gear 381, and a flow-limiting hole 39. A fixed plate 31 is welded to one end of the hose connector 15. A through hole 32 is provided on the fixed plate 31, allowing the liquid inside the hydraulic pipe body 1 to flow out through the through hole 32. This ensures the normal operation of the hydraulic pipe body 1 while utilizing the pressure of the liquid flowing within the hydraulic pipe body 1 to improve its tensile strength. A limiting ring 33 is welded to the edge of the fixed plate 31. The positioning and installation of the limiting ring 33 are achieved to prevent the limiting ring 33 from moving the fixed plate 31 and causing a change in the flow rate inside the hydraulic pipe body 1. The limiting ring 33 is fitted with a main shaft 34 with clearance. The surface of the main shaft 34 is provided with an arc groove 35. A rotating sleeve 36 is slidably connected in the arc groove 35 to protect the hydraulic pipe body 1 through multi-degree-of-freedom motion in conjunction with the tensile component 2. The rotating sleeve 36, through the limiting effect of the arc groove 35, generates a rotational degree of freedom around the axis of the main shaft 34 when the pushing sleeve is driven by the pull ring 22 to generate a degree of freedom along the axis of the main shaft 34, thereby realizing the change of the movement direction of the tensile component 2. The clearance fit between the main shaft 34 and the limiting ring 33 prevents the main shaft 34 from colliding with the fixed plate 31, which reduces the flow restriction effect of the fixed plate 31 on the hydraulic pipe body 1. The rotating sleeve 36 is driven by the arc groove 35 opened on the surface of the main shaft 34. During the movement of the rotating sleeve 36, it rotates around the axis of the main shaft 34, thereby realizing the transmission of tension from the steel wire 21 to the pressure reducing assembly 3 and providing power to the pressure reducing assembly 3.

[0045] The inner pin of the rotating sleeve 36 is connected to a limiting pin 37, which has a self-locking effect and improves the connection between the rotating sleeve 36 and the main shaft 34. The outer key of the rotating sleeve 36 is connected to a driving gear 361. The length of the keyway is equal to the stroke of the driving gear 361 along the rotating sleeve 36, thus enabling the driving gear 361 to transmit the torque of the rotating sleeve 36 around the axis of the main shaft 34 to the driven gear 381. A support block 362 is welded to the end of the rotating sleeve 36 away from the limiting ring 33, thus enabling the support block 362 to support the driving gear 361 and move with the rotating sleeve 36. The rotating sleeve 36 is connected via gears to a moving plate 38 for changing its position relative to the main shaft 34 by changing the shape of the wire 21. Through the combined action of the pull ring 22, the inner protrusion and the outer protrusion, the rotating sleeve 36 moves synchronously with the shape change of the steel wire 21. Since the movement of the rotating sleeve 36 is driven by the pull ring 22 and restricted by the arc groove 35, the rotating sleeve 36 will change its position relative to the main shaft 34. The driven gear 381 is keyed to the moving plate 38, and the driving gear 361 meshes with the driven gear 381. The moving plate 38 is provided with a flow-limiting hole 39 for changing the load on the tensile component 2 by controlling the flow rate. The flow-limiting hole 39 cooperates with the through hole 32. When the flow-limiting hole 39 and the through hole 32 are completely overlapped, the flow rate in the hydraulic pipe body 1 is the maximum. When the flow-limiting hole 39 and the through hole 32 are completely misaligned, the flow rate in the hydraulic pipe body 1 is the minimum.

[0046] When the steel wire 21 changes its shape under tension, the steel wire 21 drives the pull ring 22 to move, which in turn drives the rotating sleeve to move along the arc groove 35 opened on the main shaft 34. The arc groove 35 assists the rotating sleeve in converting the linear motion along the main shaft 34 into rotational motion around the axis of the main shaft 34. The rotation of the rotating sleeve drives the drive gear 361 to rotate, and the drive gear 361 drives the driven gear 381 to rotate, which in turn drives the moving plate 38 to rotate around its own axis. This causes the axis positions of the through hole 32 and the flow limiting hole 39 to change from completely coinciding to completely staggered, thereby changing the flow rate of the liquid in the hydraulic pipe, thus assisting the tensile component 2 in working and improving the tensile strength of the hydraulic pipe.

[0047] When the valve closes rapidly, the high-pressure fluid in the hydraulic pipe flows back quickly. At this time, the hydraulic oil drives the steel wire 21 to move, and the steel wire 21 provides initial buffering for the hydraulic oil by changing its shape. Due to the change in shape of the steel wire 21, the steel wire 21 drives the rotating sleeve 36 to move along the arc-shaped groove 35 opened on the main shaft 34 through the pull ring 22, repeating the above working process. At this time, the fluid flow rate in the hydraulic pipe decreases, thereby achieving secondary protection for hydraulic control components such as valves.

[0048] like Figures 4 to 8As shown, the through hole 32 and the flow-limiting hole 39 used to prevent damage to the hydraulic control components are arranged radially alternately along the fixed plate 31 and the moving plate 38. Compared with the structure in which the flow-limiting hole 39 and the through hole 32 are arranged in the same direction, when the moving plate moves with the rotating sleeve 36, only a small rotation angle is needed to make the axis of the through hole 32 and the flow-limiting hole 39 completely aligned, thereby increasing the flow rate of the hydraulic pipe body 1.

[0049] like Figures 4 to 8 As shown, the limiting pin 37 is a tapered pin with a taper of 1:50, which is set according to GB / T117-2000. The bottom pin of the rotating sleeve 36 is connected to a limiting pin 37, which utilizes its self-locking characteristic to improve the stability of the fit between the spindle 34 and the rotating sleeve 36. When the tapered pin is inserted into the matching tapered hole in the rotating sleeve 36, the inclined surface of the tapered pin head engages with the inclined surface of the tapered hole, generating friction. When the rotating sleeve 36 generates… When radial force acts on the tapered pin, and the tapered pin is about to slip due to displacement, the friction increases, thereby increasing the fastening force between the tapered pin and the tapered hole. At the same time, the friction between the tapered pin and the tapered hole on the rotating sleeve 36 helps to improve the fit between the limiting ring 33 and the main shaft 34, thereby preventing the main shaft 34 from pushing the moving plate 38, causing the flow limiting hole 39 and the through hole 32 to not be completely aligned, reducing the maximum flow of the hydraulic pipe body 1, and causing the tensile strength of the hydraulic pipe body 1 to decrease.

[0050] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hydraulic hose with internal and external tensile strength, comprising a hydraulic hose body (1), wherein the hydraulic hose body (1) comprises an inner rubber layer (11), a middle rubber layer (12), a reinforcing layer (13), an outer rubber layer (14), and a hose connector (15), characterized in that: It also includes a tensile component (2) and a pressure reducing component (3). The hydraulic pipe body (1) is equipped with a tensile component (2) that adapts to variable load and changes its own shape. The tensile component (2) is equipped with a pressure reducing component (3) that changes the fluid flow rate by utilizing the deformation of the tensile component (2). The tensile component (2) includes a steel wire (21), a pull ring (22), a mounting hole (23), a fixing pin (25), a support rod (24), an inner convex ring (26), and an outer convex ring (27); the reinforcing layer (13) is wound with multiple steel wires (21) for automatically changing their shape with load changes, and the steel wires (21) are fixedly connected with pull rings (22) for cooperating with the pressure reducing component (3) to prevent damage to the hydraulic pipe; the inner rubber layer (11), the middle rubber layer (12), and the outer rubber layer (14) are... An installation hole (23) is provided at one end, and a fixing pin (25) is provided in the installation hole (23). The fixing pin (25) is rotatably connected to a support rod (24) for distributing the tension at both ends of itself through the fixing pin (25). An inner convex ring (26) is fixedly connected to one end of the support rod (24) near the inner rubber layer (11), and an outer convex ring (27) is fixedly connected to one end of the support rod (24) near the outer rubber layer (14) to change its own load based on the movement of the inner convex ring (26) and the pull ring (22) respectively. The pressure-reducing assembly (3) includes a fixed plate (31), a through hole (32), a limiting ring (33), a main shaft (34), an arc groove (35), a rotating sleeve (36), a driving gear (361), a support block (362), a limiting pin (37), a moving plate (38), a driven gear (381), and a flow-limiting hole (39). One end of the hose connector (15) is fixedly connected to the fixed plate (31). The fixed plate (31) has a through hole (32). The edge of the fixed plate (31) is fixedly connected to the limiting ring (33). The main shaft (34) is fitted with the limiting ring (33) with clearance. The surface of the main shaft (34) has an arc groove (35). The rotating sleeve (36) for protecting the hydraulic pipe body (1) through multi-degree-of-freedom motion is slidably connected in the arc groove (35). A limiting pin (37) is fixedly connected inside the rotating sleeve (36) for improving the connection between the rotating sleeve (36) and the main shaft (34) through self-locking. A driving gear (361) is fixedly connected outside the rotating sleeve (36). A support block (362) is fixedly connected to the end of the rotating sleeve (36) away from the limiting ring (33). A moving plate (38) for changing position by changing the shape of the steel wire (21) is fixedly connected to the rotating sleeve (36). A driven gear (381) is fixedly connected to the moving plate (38). A flow-limiting hole (39) is opened on the moving plate (38) to control the flow rate and change the load on the tensile component (2). The number of the limiting ring (33), the main shaft (34), the arc groove (35) and the rotating sleeve (36) is the same as the number of mounting holes (23).

2. The hydraulic pipe with internal and external tensile strength according to claim 1, characterized in that: The steel wire (21) is wound to form a tensile-resistant cylindrical mesh structure, and the mesh shape is a rhombus to increase the moment of inertia and improve the tensile strength.

3. The hydraulic pipe with internal and external tensile strength according to claim 1, characterized in that: The pull ring (22) and support rod (24) are arranged in a circumferential array inside the hydraulic pipe body (1), and the number of pull rings (22) and support rods (24) is symmetrically distributed in an even number.

4. The hydraulic pipe with internal and external tensile strength according to claim 1, characterized in that: The fixing pin (25) is rotatably connected to a support rod (24) for balancing the load on the outer convex ring (27) and the inner convex ring (26). The support rod (24) controls the hydraulic components to change the flow rate under the action of the pull ring (22).

5. A hydraulic pipe with internal and external tensile strength according to claim 1, characterized in that: The through hole (32) and the flow-limiting hole (39) for preventing damage to the hydraulic control components are arranged radially alternately along the fixed plate (31) and the movable plate (38).

6. A hydraulic pipe with internal and external tensile strength according to claim 1, characterized in that: The limiting pin (37) is a tapered pin, and the bottom of the rotating sleeve (36) is fixedly connected with a limiting pin (37) for improving the stability of the fit between the spindle (34) and the rotating sleeve (36) by utilizing the self-locking characteristic.

Images