Low-pressure oil pipe with good tensile property

Abstract

The utility model discloses a low-pressure oil pipe with good tensile property, which belongs to the field of low-pressure oil pipes and comprises a low-pressure oil pipe body, an inner rubber layer is arranged inside the low-pressure oil pipe body, a braid layer is arranged outside the inner rubber layer, an outer rubber layer is arranged outside the braid layer, and an additional layer is arranged outside the outer rubber layer. A plurality of groups of annularly distributed first auxiliary cavities and second auxiliary cavities are arranged in the outer rubber layer, the auxiliary cavities not only reduce the weight of the oil pipe, but also effectively disperse the stress of the oil pipe when the oil pipe is bent or pressed through the unique shape and distribution of the auxiliary cavities, and a stretching part and an extruding part are arranged between the first auxiliary cavities and the second auxiliary cavities, so that the oil pipe is more stable in bending or pressing. The included angle of the stretching part is 120 degrees, and the included angle of the extruding part is 30 degrees, so that when the oil pipe is stretched or extruded, stress can be more uniformly distributed on the whole oil pipe, and cracking or abrasion caused by local stress concentration is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of low-pressure oil pipe technology, specifically relating to a low-pressure oil pipe with good tensile strength. Background Technology

[0002] In industries such as industry, automobiles, agricultural machinery and hydraulic equipment, low-pressure oil pipes are key components for oil transmission, and their performance is directly related to the reliability and safety of the system. Existing low-pressure oil pipes usually adopt a multi-layer composite structure, including an inner rubber layer, a reinforcing layer (such as a fiber or metal braided layer) and an outer rubber layer, to meet the basic requirements for oil resistance, pressure resistance and flexibility.

[0003] For example, publication number CN 221442721 U provides a vibration-damping low-pressure oil pipe, including an end positioning tube and a hose. One end of the end positioning tube is screwed onto an end coupling tube, simplifying the docking process and making installation more convenient. This vibration-damping low-pressure oil pipe not only provides a stable connection but also effectively reduces vibration transmission, improving the reliability and performance of the entire system.

[0004] However, as the application scenarios of the aforementioned low-pressure oil pipes become more complex, the outer rubber layer is prone to local stress concentration when the oil pipe is bent or subjected to pressure, leading to cracking or wear. This results in poor tensile strength of the low-pressure oil pipe and shortens its service life. Therefore, this utility model provides a low-pressure oil pipe with good tensile strength. Utility Model Content

[0005] The purpose of this invention is to provide a low-pressure oil pipe with good tensile strength to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a low-pressure oil pipe with good tensile strength, comprising a low-pressure oil pipe body, wherein the interior of the low-pressure oil pipe body is provided with an inner rubber layer, the exterior of the inner rubber layer is provided with a braided layer, the exterior of the braided layer is provided with an outer rubber layer, the exterior of the outer rubber layer is provided with an additional layer, and the interior of the outer rubber layer is provided with multiple sets of annularly distributed first auxiliary cavities and second auxiliary cavities.

[0007] In a preferred embodiment, the top end of the first auxiliary cavity and the bottom end of the second auxiliary cavity are provided with stretching portions, and the two sides of the bottom of the first auxiliary cavity and the two sides of the bottom of the second auxiliary cavity are provided with squeezing portions.

[0008] In a preferred embodiment, the included angle of the stretching portion is 120 degrees, and the included angle of the extrusion portion is 30 degrees.

[0009] In a preferred embodiment, the outer adhesive layer is bonded to the outside of the braided layer, and the material of the outer adhesive layer is neoprene rubber.

[0010] In a preferred embodiment, the inner rubber layer is made of fluororubber.

[0011] In a preferred embodiment, the braided layer is located between the outer rubber layer and the inner rubber layer, and the braided layer is made of steel wire.

[0012] In a preferred embodiment, the additional layer is bonded to the outside of the outer adhesive layer, and the material of the additional layer is a polyester fiber layer.

[0013] In a preferred embodiment, the first auxiliary cavity and the second auxiliary cavity are arranged in an alternating circular pattern, and the cavity is filled with elastic silicone.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This low-pressure tubing with good tensile strength has multiple sets of annularly distributed first and second auxiliary cavities inside the outer rubber layer. These auxiliary cavities not only reduce the weight of the tubing, but also effectively disperse the stress of the tubing when it is bent or compressed through their unique shape and distribution. There is a tension section and a compression section between the first and second auxiliary cavities. The included angle of the tension section is 120 degrees and the included angle of the compression section is 30 degrees. This design allows the stress to be more evenly distributed throughout the tubing when it is stretched or compressed, avoiding cracking or wear caused by local stress concentration, thereby enhancing the tensile strength of the low-pressure tubing.

[0016] This low-pressure oil pipe with good tensile strength has elastic silicone filling the first and second auxiliary cavities. This material has good elasticity and buffering properties, which can further absorb and disperse the impact force when the oil pipe is subjected to external force, and protect the oil pipe from damage.

[0017] This low-pressure oil pipe with good tensile strength has a braided layer located between the inner and outer rubber layers, and the material is steel wire. This structure greatly enhances the tensile strength of the oil pipe. The steel wire braided layer can effectively disperse and bear the stress of the oil pipe when it is subjected to tensile force, preventing the oil pipe from being damaged due to excessive stretching, thereby further improving the overall tensile performance of the oil pipe.

[0018] This low-pressure oil pipe, with its high tensile strength, has an outer rubber layer bonded to the outside of the braided layer. Made of neoprene rubber, it offers excellent oil resistance, wear resistance, and aging resistance, protecting the braided layer from environmental corrosion. An additional layer, bonded to the outside of the outer rubber layer, is made of polyester fiber, further enhancing the pipe's wear resistance and tear resistance. The high strength and toughness of the polyester fiber layer make the pipe less prone to scratches or tears when subjected to external forces, extending its service life. Attached Figure Description

[0019] Figure 1 This is a front view of the structure of this utility model;

[0020] Figure 2 This is a side view of the structure of this utility model;

[0021] Figure 3 This is a cross-sectional view of the outer adhesive layer.

[0022] In the figure: 1. Low-pressure oil pipe body; 101. Inner rubber layer; 102. Braided layer; 103. Outer rubber layer; 1031. First auxiliary cavity; 1032. Tensioning part; 1033. Extrusion part; 1034. Second auxiliary cavity; 104. Additional layer. Detailed Implementation

[0023] The present invention will be further described below with reference to the embodiments.

[0024] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0025] Please see Figure 1-3 This utility model provides a low-pressure oil pipe with good tensile strength, including a low-pressure oil pipe body 1, an inner rubber layer 101 inside the low-pressure oil pipe body 1, a braided layer 102 outside the inner rubber layer 101, an outer rubber layer 103 outside the braided layer 102, an additional layer 104 outside the outer rubber layer 103, the outer rubber layer 103 is bonded to the outside of the braided layer 102, the outer rubber layer 103 is made of neoprene rubber, the inner rubber layer 101 is made of fluororubber, the braided layer 102 is located between the outer rubber layer 103 and the inner rubber layer 101, the braided layer 102 is made of steel wire, and the additional layer 104 is bonded to the outside of the outer rubber layer 103, the additional layer 104 is made of polyester fiber layer;

[0026] In industrial, automotive, agricultural machinery and hydraulic equipment systems, this low-pressure oil pipe is a key component for oil transmission. Oil enters the channel formed by the inner rubber layer 101 from one end of the oil pipe. The inner rubber layer 101 is in direct contact with the oil and is made of fluororubber. Fluororubber has good oil resistance and can resist the corrosion of various chemicals in the oil, ensuring that the oil will not be damaged during transmission. This ensures that the oil can flow stably and smoothly in the oil pipe until it reaches the other end of the oil pipe, completing the oil transmission task.

[0027] When the tubing is subjected to tensile force, the braided layer 102 begins to function. Located between the inner rubber layer 101 and the outer rubber layer 103, the braided layer 102 is made of steel wire. The steel wire braided layer 102 possesses high strength and toughness. When the tubing is stretched, the steel wire braided layer 102 can evenly distribute and bear the tensile stress, preventing the tubing from breaking or deforming due to excessive stretching, thus ensuring the integrity of the tubing structure. The outer rubber layer 103, bonded to the outside of the braided layer 102, is made of neoprene rubber. Neoprene rubber has good wear resistance, aging resistance, and oil resistance. It further protects the braided layer 102 from external environmental corrosion. For example, it prevents the braided layer 102 from being scratched, worn, or corroded by chemicals, and also acts as a buffer when the tubing is subjected to slight compression or friction, reducing damage to the internal structure of the tubing. The additional layer 104 is bonded to the outside of the outer rubber layer 103 and is made of polyester fiber. The polyester fiber layer has high strength and good toughness. When the tubing is in a complex working environment, such as being scratched by sharp objects or rubbed against other components, the additional layer 104 can resist these external forces and prevent the outer rubber layer 103 from being scratched or torn, thereby further protecting the entire tubing structure.

[0028] In this embodiment, the outer adhesive layer 103 has multiple sets of annularly distributed first auxiliary cavities 1031 and second auxiliary cavities 1034 inside. The top end of the first auxiliary cavity 1031 and the bottom end of the second auxiliary cavity 1034 are provided with stretching portions 1032. The two sides of the bottom of the first auxiliary cavity 1031 and the two sides of the bottom of the second auxiliary cavity 1034 are provided with extrusion portions 1033. The included angle of the stretching portions 1032 is 120 degrees, and the included angle of the extrusion portions 1033 is 30 degrees. The first auxiliary cavities 1031 and the second auxiliary cavities 1034 are arranged in an alternating circumferential pattern, and the cavity is filled with elastic silicone.

[0029] When the tubing is not subjected to external force and is in normal working condition, the elastic silicone body filled inside the multiple annularly distributed first auxiliary cavity 1031 and second auxiliary cavity 1034 is in a relatively stable state. Together with the outer rubber layer 103, it constitutes the outer protective structure of the tubing, maintaining the overall shape and structural stability of the tubing and ensuring that the oil can be transmitted normally in the channel formed by the inner rubber layer 101. When the tubing is subjected to tensile force, the tensile part 1032 begins to play its role. Since the tensile part 1032 is located at the top of the first auxiliary cavity 1031 and the bottom of the second auxiliary cavity 1034 with an angle of 120 degrees, this specific angle design allows the tensile part 1032 to produce a certain elastic deformation when subjected to tensile force. The elastic silicone body plays a role in buffering and dispersing stress during the deformation process of the tensile part 1032. It can absorb part of the tensile stress and evenly transfer the stress to the surrounding outer rubber layer 103 structure, avoiding stress concentration in a certain local area, thereby preventing the outer rubber layer 103 from cracking or being damaged due to excessive stretching.

[0030] When the oil pipe is subjected to extrusion pressure, the extrusion section 1033 begins to bear the pressure. The extrusion section 1033 is located on both sides of the bottom of the first auxiliary cavity 1031 and the bottom of the second auxiliary cavity 1034, with an included angle of 30 degrees. This small included angle design allows the extrusion section 1033 to better disperse the pressure when subjected to extrusion pressure. The elastic silicone body deforms when the extrusion section 1033 is extruded, and absorbs and buffers the extrusion pressure through its own elastic properties, reducing the impact of the extrusion pressure on the outer rubber layer 103 and the internal structure of the oil pipe, and protecting the oil pipe from damage. During the bending process of the oil pipe, the staggered circumferential arrangement of the first auxiliary cavity 1031 and the second auxiliary cavity 1034 allows the oil pipe to bend more flexibly. When the oil pipe is bent, the elastic silicone body can deform accordingly with the deformation of the outer rubber layer 103, filling the gaps generated at the bending part of the oil pipe, maintaining the tightness and integrity of the oil pipe structure, and preventing oil leakage at the bending part.

[0031] The specific angle design of the tension section 1032 and the buffering effect of the elastic silicone body enable the stress to be more evenly distributed on the entire outer rubber layer 103 when the oil pipe is subjected to tensile force, avoiding the cracking or damage of the outer rubber layer 103 caused by local stress concentration, greatly improving the tensile performance of the oil pipe and extending its service life in tensile working environment. The smaller included angle of the extrusion section 1033 and the buffering and pressure dispersion function of the elastic silicone body can effectively reduce the damage of the extrusion force to the oil pipe structure when the oil pipe is subjected to extrusion force, protect the inside of the oil pipe from the extrusion effect, improve the pressure resistance of the oil pipe, and ensure the reliability of the oil pipe in high-pressure working environment.

[0032] The staggered circumferential arrangement of the first auxiliary cavity 1031 and the second auxiliary cavity 1034, along with the adaptive deformation of the elastic silicone body, allows the oil pipe to bend more flexibly while maintaining structural tightness and integrity. This not only facilitates the installation and layout of the oil pipe in complex equipment but also reduces the risk of oil leakage due to bending, improving the performance of the oil pipe in bending working environments. The multiple sets of annularly distributed first auxiliary cavities 1031 and second auxiliary cavities 1034 also reduce the overall weight of the oil pipe to a certain extent, which helps to reduce the load on the equipment during operation, improve the operating efficiency of the equipment, and also facilitates the transportation and installation of the oil pipe.

[0033] The working principle and usage process of this utility model are as follows: Firstly, in systems such as industrial, automotive, agricultural machinery, and hydraulic equipment, this low-pressure oil pipe serves as a key component for oil transmission. Oil enters the channel formed by the inner rubber layer 101 from one end of the oil pipe. The inner rubber layer 101 is in direct contact with the oil and is made of fluororubber. Fluororubber has good oil resistance and can resist the corrosion of various chemicals in the oil, ensuring that the oil will not damage the inner rubber layer 101 during transmission. This ensures that the oil can flow stably and smoothly in the oil pipe until it reaches the other end, completing the oil transmission task. When the oil pipe is subjected to tensile force, the braided layer 102 begins to function. The braided layer 102 is located between the inner rubber layer 101 and the outer rubber layer 103, and is made of steel wire. The steel wire braided layer 102 has high strength and toughness. When the tubing is stretched, the steel wire braided layer 102 can evenly distribute and bear the tensile stress, preventing the tubing from breaking or deforming due to excessive stretching, thus ensuring the integrity of the tubing structure. The outer rubber layer 103 is bonded to the outside of the braided layer 102 and is made of neoprene rubber. Neoprene rubber has good wear resistance, aging resistance, and oil resistance. It not only further protects the braided layer 102 from external environmental corrosion, such as preventing the braided layer 102 from being damaged... The additional layer 104, bonded to the outside of the outer adhesive layer 103, is made of polyester fiber. This layer possesses high strength and good toughness, and when the oil pipe is in a complex working environment, such as being scratched by sharp objects or rubbed against other components, the additional layer 104 can resist these external forces, preventing the outer adhesive layer 103 from being scratched or torn, thus further protecting the entire oil pipe structure. When the oil pipe is not subjected to external forces and is in normal working condition... The elastic silicone filling the multiple annularly distributed first auxiliary cavities 1031 and second auxiliary cavities 1034 is in a relatively stable state. Together with the outer adhesive layer 103, it forms the outer protective structure of the oil pipe, maintaining the overall shape and structural stability of the oil pipe and ensuring that the oil can be normally transported in the channel formed by the inner adhesive layer 101. When the oil pipe is subjected to tensile force, the tensioning part 1032 begins to function. Since the tensioning part 1032 is located at the top of the first auxiliary cavity 1031 and the bottom of the second auxiliary cavity 1034, with an angle of 120 degrees, this specific angle design makes the tensioning part 1032... When subjected to tensile force, 032 can produce a certain degree of elastic deformation. The elastic silicone body plays a role in buffering and dispersing stress during the deformation process of the tensile part 1032. It can absorb part of the tensile stress and evenly transfer the stress to the surrounding outer rubber layer 103 structure, avoiding stress concentration in a certain local area, thereby preventing the outer rubber layer 103 from cracking or being damaged due to excessive stretching. When the oil pipe is subjected to extrusion force, the extrusion part 1033 begins to bear pressure. The extrusion part 1033 is located on both sides of the bottom of the first auxiliary cavity 1031 and the bottom of the second auxiliary cavity 1034, with an included angle of thirty degrees.This smaller included-angle design allows the extrusion section 1033 to better disperse pressure when subjected to extrusion force. The elastic silicone body deforms when the extrusion section 1033 is compressed, absorbing and buffering the extrusion force through its elastic properties, reducing the impact of the extrusion force on the outer rubber layer 103 and the internal structure of the oil pipe, protecting the oil pipe from damage. During the bending process, the staggered circumferential arrangement of the first auxiliary cavity 1031 and the second auxiliary cavity 1034 allows the oil pipe to bend more flexibly. When the oil pipe bends, the elastic silicone body deforms accordingly with the deformation of the outer rubber layer 103, filling the gaps created at the bend, maintaining the tightness and integrity of the oil pipe structure, and preventing oil leakage at the bend.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-pressure oil pipe with good tensile strength, comprising a low-pressure oil pipe body (1), characterized in that: The low-pressure oil pipe body (1) has an inner rubber layer (101) inside, a braided layer (102) outside the inner rubber layer (101), an outer rubber layer (103) outside the braided layer (102), an additional layer (104) outside the outer rubber layer (103), and multiple sets of annularly distributed first auxiliary cavities (1031) and second auxiliary cavities (1034) inside the outer rubber layer (103).

2. The low-pressure oil pipe with good tensile strength according to claim 1, characterized in that: The top end of the first auxiliary cavity (1031) and the bottom end of the second auxiliary cavity (1034) are provided with a stretching part (1032), and the two sides of the bottom of the first auxiliary cavity (1031) and the two sides of the bottom of the second auxiliary cavity (1034) are provided with a squeezing part (1033).

3. A low-pressure oil pipe with good tensile strength according to claim 2, characterized in that: The included angle of the stretching part (1032) is 120 degrees, and the included angle of the extrusion part (1033) is 30 degrees.

4. A low-pressure oil pipe with good tensile strength according to claim 3, characterized in that: The outer adhesive layer (103) is bonded to the outside of the braided layer (102), and the material of the outer adhesive layer (103) is neoprene rubber.

5. A low-pressure oil pipe with good tensile strength according to claim 4, characterized in that: The inner rubber layer (101) is made of fluororubber.

6. A low-pressure oil pipe with good tensile strength according to claim 5, characterized in that: The braided layer (102) is located between the outer rubber layer (103) and the inner rubber layer (101), and the braided layer (102) is made of steel wire.

7. A low-pressure oil pipe with good tensile strength according to claim 6, characterized in that: The additional layer (104) is bonded to the outside of the outer adhesive layer (103), and the material of the additional layer (104) is a polyester fiber layer.

8. A low-pressure oil pipe with good tensile strength according to claim 3, characterized in that: The first auxiliary cavity (1031) and the second auxiliary cavity (1034) are arranged in an alternating circular pattern, and the cavity is filled with elastic silicone.

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