Low-temperature-resistant nylon hose

Abstract

The utility model provides a low temperature resistant nylon hose which comprises a hose body, the hose body is composed of a nylon outer layer, a braid layer and an inner wall layer which are sequentially arranged from outside to inside, and both the nylon outer layer and the inner wall layer are made of PA1012 materials. The braid layer is used for achieving a heat preservation effect. The PA1012 nylon is a high-performance polyamide material and has excellent low temperature resistance. The flexible pipe can keep the physical and chemical properties stable at an extremely low temperature, and is not easy to embrittle or harden due to low temperature, so that the flexibility and toughness of the flexible pipe at-40 DEG C or lower temperature are ensured; meanwhile, the woven layer is arranged between the nylon outer layer and the inner wall layer, so that the heat preservation performance of the hose is further improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, and in particular to a low-temperature resistant nylon hose. Background Technology

[0002] In recent years, with the upgrading of national emission regulations and the recovery of infrastructure investment, my country's commercial vehicle market has made steady progress. Moreover, domestic independent brand commercial vehicles account for more than 70% of the market share. After years of development, the quality and performance of independent brand commercial vehicles have become comparable to joint venture brands or imported brands, and they are also exported to more and more countries.

[0003] Commercial vehicles typically use air brakes, which are required to withstand low temperatures of -40°C. However, as my country exports more and more commercial vehicles to countries, including many located in high-latitude regions, the extreme climate conditions in these areas may result in even lower temperatures, far below the current -40°C low-temperature resistance standard. Utility Model Content

[0004] This application provides a low-temperature resistant nylon hose that can maintain normal operation at temperatures as low as -40°C and below.

[0005] The low-temperature resistant nylon hose provided in this application adopts the following technical solution:

[0006] A low-temperature resistant nylon hose includes a hose body, which is composed of a nylon outer layer, a braided layer and an inner wall layer arranged sequentially from the outside to the inside. The nylon outer layer and the inner wall layer are both made of PA1012 material; the braided layer is used to provide heat insulation.

[0007] Through the above technical solution, PA1012 nylon is a high-performance polyamide material with excellent low-temperature resistance. It can maintain the stability of its physical and chemical properties at extremely low temperatures and is not prone to embrittlement or hardening due to low temperatures, thus ensuring the flexibility and toughness of the hose at -40℃ and lower temperatures; at the same time, the braided layer between the outer and inner wall layers of nylon further improves the heat insulation performance of the hose.

[0008] Preferably, the woven layer includes a steel mesh and a carbon fiber cloth layer, wherein the carbon fiber cloth layer is wrapped around the outer peripheral surface of the inner wall layer, and the steel mesh is wrapped around the outer peripheral surface of the carbon fiber cloth layer.

[0009] Through the above technical solution, the carbon fiber cloth layer is closely attached to the inner wall layer, forming a tight thermal insulation barrier, which effectively reduces the transfer of heat from the inside of the hose to the outside and improves the thermal insulation performance of the hose; while the steel mesh, as the outer layer of the braided layer, provides additional strength and support. In low-temperature environments, the steel mesh can prevent the hose from shrinking or deforming excessively due to temperature drop, thereby ensuring the shape stability and structural integrity of the hose.

[0010] Preferably, hose connectors are provided on both sides of the hose body, and protective components are wrapped around the two connection points between the hose connectors and the hose body. The protective components are used to protect the connection points between the hose connectors and the hose body.

[0011] Through the above technical solutions, the protective components can disperse and alleviate the external pressure and stress on the connection, reduce the possibility of stress concentration, and thus extend the service life of the hose.

[0012] Preferably, the protective component includes a protective sleeve and an elastic strip. The protective sleeve has a receiving cavity, and the connection between the hose connector and the hose body is sleeved in the receiving cavity. One end of the elastic strip is spirally fixed and wrapped around the outer circumferential surface of the hose body, and the other end is fixed on the protective sleeve.

[0013] Through the above technical solutions, the cavity design on the protective sleeve ensures a tight fit between the protective sleeve and the hose, avoiding damage due to frequent bending, and improving tensile strength and service life; the spiral fixing design of the elastic strip is used to prevent the protective sleeve from loosening or shifting due to thermal expansion and contraction at low temperatures, thereby further enhancing the stability of the connection.

[0014] Preferably, the protective sleeve has a notch on one side facing the elastic strip.

[0015] The above technical solution facilitates the installation personnel to open the protective sleeve and place it on the connection between the hose connector and the hose body.

[0016] Preferably, the protective sleeve is fixed to the connection between the hose connector and the hose body by wrapping it with a sealing tape.

[0017] Through the above technical solution, the sealing tape has good elasticity and low temperature resistance, and can maintain its sealing performance in low temperature environments, thereby further protecting the connection between the hose connector and the hose body.

[0018] Preferably, both the protective sleeve and the elastic strip are made of silicone rubber.

[0019] Through the above technical solutions, silicone rubber materials can still maintain good elasticity and sealing performance at temperatures of -40℃ and lower. Therefore, using silicone rubber as the material for protective sleeves and elastic strips allows them to continue to function at temperatures of -40℃ and lower.

[0020] The main technical effects of this utility model are reflected in the following aspects:

[0021] 1. This utility model ensures the flexibility and toughness of the hose at -40℃ and lower temperatures by designing a braided layer and using PA1012 nylon material as the outer and inner wall layers;

[0022] 2. This utility model uses a braided layer composed of steel mesh and carbon fiber cloth, which ensures the shape stability and structural integrity of the hose while also providing heat insulation.

[0023] 3. This utility model reduces the possibility of stress concentration and avoids damage due to frequent bending by wrapping protective components around the connection points of the hose connector and the hose body, thereby extending the service life of the hose. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the cross-sectional structure of the hose body in an embodiment of this application.

[0026] Reference numerals: 1. Hose body; 11. Nylon outer layer; 12. Braided layer; 121. Steel mesh; 122. Carbon fiber cloth layer; 13. Inner wall layer; 2. Hose connector; 3. Protective components; 31. Protective sleeve; 311. Notch; 32. Elastic strip; 4. Sealing tape. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-2 The specific embodiments of this utility model will be further described in detail to make the technical solution of this utility model easier to understand and master.

[0028] This application discloses a low-temperature resistant nylon hose:

[0029] Reference Figure 2A low-temperature resistant nylon hose includes a hose body 1, which is composed of a nylon outer layer 11, a braided layer 12, and an inner wall layer 13 arranged sequentially from the outside to the inside. Both the nylon outer layer 11 and the inner wall layer 13 are made of PA1012 material. The braided layer 12 provides insulation. PA1012 nylon is a high-performance polyamide material with excellent low-temperature resistance. It maintains the stability of its physical and chemical properties at extremely low temperatures and is not prone to embrittlement or hardening due to low temperatures, thus ensuring the hose's flexibility and toughness at -40℃ and lower temperatures. Simultaneously, the braided layer 12 between the nylon outer layer 11 and the inner wall layer 13 further enhances the hose's insulation performance. Compared to the internationally commonly used PA11 nylon material, PA1012 nylon has a domestic advantage. With the changing international situation leading to increasingly higher prices for imported low-temperature resistant PA11 material and significant cost pressures, using domestically produced PA1012 nylon material can overcome this limitation, resulting in a price advantage.

[0030] Reference Figure 2 The braided layer 12 includes a steel mesh 121 and a carbon fiber cloth layer 122. The carbon fiber cloth layer 122 wraps around the outer periphery of the inner wall layer 13, and the steel mesh 121 wraps around the outer periphery of the carbon fiber cloth layer 122. The carbon fiber cloth layer 122 is tightly attached to the inner wall layer 13, forming a dense thermal insulation barrier, which effectively reduces the transfer of heat from the inside of the hose to the outside and improves the thermal insulation performance of the hose. The steel mesh 121, as the outer layer of the braided layer 12, provides additional strength and support. In low-temperature environments, the steel mesh 121 can prevent the hose from excessively shrinking or deforming due to temperature drops, thereby ensuring the shape stability and structural integrity of the hose.

[0031] Reference Figure 1 The hose body 1 has hose connectors 2 installed on both sides. Protective components 3 are wrapped around the two connection points between the hose connectors 2 and the hose body 1. The protective components 3 protect the connection points between the hose connectors 2 and the hose body 1. The protective components 3 can disperse and alleviate external pressure and stress at the connection points, reducing the possibility of stress concentration and thus extending the service life of the hose.

[0032] The protective component 3 includes a protective sleeve 31 and an elastic strip 32. The protective sleeve 31 has a receiving cavity, and the connection between the hose connector 2 and the hose body 1 is fitted inside the receiving cavity. One end of the elastic strip 32 is spirally fixed and wrapped around the outer circumference of the hose body 1, and the other end is fixed to the protective sleeve 31. The receiving cavity design on the protective sleeve 31 ensures a tight fit between the protective sleeve 31 and the hose, avoiding damage due to frequent bending, and improving tensile strength and service life. The spiral fixing design of the elastic strip 32 is used to prevent the protective sleeve 31 from loosening or shifting due to thermal expansion and contraction at low temperatures, thereby further enhancing the stability of the connection.

[0033] Both the protective sleeve 31 and the elastic strip 32 are made of silicone rubber. Silicone rubber can maintain good elasticity and sealing performance at temperatures of -40℃ and lower, so using silicone rubber as the material for the protective sleeve 31 and the elastic strip 32 allows them to continue to function at temperatures of -40℃ and lower.

[0034] Reference Figure 1 The protective sleeve 31 has a notch 311 on one side facing the elastic strip 32. This allows the installer to easily open the protective sleeve 31 and place it over the connection between the hose connector 2 and the hose body 1. The protective sleeve 31 is then secured to the connection between the hose connector 2 and the hose body 1 by wrapping it with sealing tape 4. The sealing tape 4 has good elasticity and low-temperature resistance, maintaining a tight seal in low-temperature environments, thus further protecting the connection between the hose connector 2 and the hose body 1. During installation, the operator first opens the protective sleeve 31 through the notch 311 and places it over the connection, then seals it with the sealing tape 4, and finally spirally wraps the elastic strip 32 around the outer circumference of the hose body 1 to prevent the protective sleeve 31 from loosening or shifting due to thermal expansion and contraction at low temperatures.

[0035] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A low-temperature resistant nylon hose, comprising a hose body (1), characterized in that, The hose body (1) is composed of a nylon outer layer (11), a braided layer (12) and an inner wall layer (13) arranged sequentially from the outside to the inside. The nylon outer layer (11) and the inner wall layer (13) are both made of PA1012 material. The braided layer (12) is used to provide heat insulation.

2. The low-temperature resistant nylon hose according to claim 1, characterized in that, The woven layer (12) includes a steel mesh (121) and a carbon fiber cloth layer (122). The carbon fiber cloth layer (122) is wrapped around the outer peripheral surface of the inner wall layer (13), and the steel mesh (121) is wrapped around the outer peripheral surface of the carbon fiber cloth layer (122).

3. The low-temperature resistant nylon hose according to claim 1, characterized in that, The hose body (1) is provided with hose connectors (2) on both sides. The hose connectors (2) and the hose body (1) are connected by protective components (3) on the outside. The protective components (3) are used to protect the connection between the hose connectors (2) and the hose body (1).

4. The low-temperature resistant nylon hose according to claim 3, characterized in that, The protective component (3) includes a protective sleeve (31) and an elastic strip (32). The protective sleeve (31) has a receiving cavity. The connection between the hose connector (2) and the hose body (1) is fitted inside the receiving cavity. One end of the elastic strip (32) is spirally fixed and wrapped around the outer circumference of the hose body (1), and the other end is fixed on the protective sleeve (31).

5. The low-temperature resistant nylon hose according to claim 4, characterized in that, The protective sleeve (31) has a notch (311) on one side facing the elastic strip (32).

6. The low-temperature resistant nylon hose according to claim 4, characterized in that, The protective sleeve (31) is wrapped and fixed at the connection between the hose connector (2) and the hose body (1) by a sealing tape (4).

7. The low-temperature resistant nylon hose according to claim 4, characterized in that, Both the protective sleeve (31) and the elastic strip (32) are made of silicone rubber.

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