Heat-insulating anti-aging hose

Abstract

The utility model discloses a heat-insulating anti-aging hose, which belongs to the technical field of hoses and comprises a lining layer, a reinforcing layer, a heat-insulating layer and a protective layer which are sequentially wrapped and fixed from inside to outside. The heat insulation layer is formed by winding and coating an aerogel felt tape outside the reinforcing layer, the aerogel felt tape comprises an aerogel body and a connecting body, and the aerogel body is fixedly connected with the connecting body. The heat insulation layer of the hose is high in composite strength and not prone to delaminating, the heat insulation effect can be effectively achieved for a long time, and the service life of the heated radiation pipe body can be prolonged.

Description

Technical Field

[0001] This utility model relates to the field of flattenable hoses, and more particularly to a heat-insulating and anti-aging hose. Background Technology

[0002] Flat flexible hoses are a type of hose widely used in automotive, medical, aerospace, and agricultural irrigation industries. Their designs can be diversified, including high-temperature resistance, low-temperature resistance, corrosion resistance, and abrasion resistance, and can be customized to meet the bending radius, pressure resistance, and other requirements of different scenarios.

[0003] The typical structure of existing flattenable hoses is a "glue-wire-glue" structure, where a tubular braided band encapsulates a plastic material. Currently, the most commonly used plastic material is TPU (thermoplastic polyurethane), and the braided band uses fibers such as polyester and aramid. To address the issue of heat radiation aging in current flattenable hoses, some products use a rubber layer to replace TPU products. However, rubber-based hoses are heavier, more complex to process, and more expensive, limiting their application. Other methods involve adding anti-aging additives to TPU to improve its heat aging resistance. However, TPU production involves high-temperature synthesis of raw materials in a reactor. Excessive addition of anti-aging additives can interfere with the synthesis process, resulting in a limited amount of additives added during the reaction, making it difficult to significantly improve the material's heat aging resistance. Furthermore, the high temperatures during synthesis may affect the performance of the anti-aging additives.

[0004] In view of the above-mentioned technical defects, the applicant believes it is necessary to provide a new type of flattenable hose that is easy to process and has significantly improved heat insulation and anti-aging properties. Utility Model Content

[0005] The present invention aims to provide a heat-insulating and anti-aging flexible hose that can improve the heat-insulating and anti-aging performance of existing flat flexible hoses, while also being easy to process and manufacture.

[0006] To achieve the above objectives, this utility model provides a heat-insulating and anti-aging flexible hose, which adopts the following technical solution:

[0007] A heat-insulating and anti-aging flexible hose includes an inner liner, a reinforcing layer, a heat insulation layer, and a protective layer, wherein the inner liner, reinforcing layer, heat insulation layer, and protective layer are sequentially wrapped and fixed from the inside to the outside; the heat insulation layer is formed by wrapping an aerogel felt tape around the reinforcing layer, wherein the aerogel felt tape includes an aerogel body and a connector, and the aerogel body is fixedly connected to the connector.

[0008] Aerogels possess excellent thermal insulation properties, and their application in flexible hoses can significantly improve the hose's insulation and anti-aging performance. Aerogels are also lightweight and highly flexible, and their application to the hose does not significantly affect the hose's bending radius or weight. However, aerogels have limited viscosity, making it difficult to laminate the aerogel layer with adjacent layers in hose manufacturing. Poor lamination can lead to delamination of the aerogel-containing hose after a period of use, thus limiting the technical solutions for enhancing the insulation and anti-aging performance of hoses using aerogels.

[0009] This application, through the aforementioned technical solution, firstly, involves wrapping an aerogel felt tape around the reinforcing layer with a certain force to form a heat insulation layer. The wrapping force enhances the bonding strength between the aerogel felt tape and the reinforcing layer. Secondly, the aerogel felt tape in this application pre-composite and fixed the aerogel to the connector. In some specific embodiments, the connector can be a sheet containing an adhesive layer, a material capable of heat-melting bonding, or a material similar to or the same as the protective layer, such as TPU. During the wrapping process of the aerogel felt tape, the connector bonds to both the reinforcing and protective layers, improving the bonding strength between the heat insulation layer and the reinforcing and protective layers, thus enabling the heat insulation layer of this application to effectively perform its heat insulation function for a long period.

[0010] In some embodiments, the connectors are located on both sides of the aerogel along its length.

[0011] Connectors are provided on both sides of the aerogel along its length. This reduces the vertical overlap of the aerogel during winding, resulting in a certain degree of flatness on the outer surface of the insulation layer, which is beneficial for the processing of subsequent layers. Simultaneously, the connectors surrounding both sides of the aerogel along its length effectively prevent damage to the aerogel during the winding process.

[0012] In some embodiments, the connector is slotted along its thickness direction, and the aerogel is fitted and fixed within the slot.

[0013] In some implementations, the slot is a blind slot.

[0014] The above technical solution can further improve the connection stability and protection effect of the connector to the aerogel, and also enable the connector to exist on the back side of the aerogel. The inner surface of the insulation layer is connected to the outer surface of the reinforcement layer through the connector, which further improves the bonding strength between the insulation layer and the reinforcement layer.

[0015] In some embodiments, the heat insulation layer includes a first heat insulation layer and a second heat insulation layer, and the protective layer includes a first protective layer and a second protective layer; the second heat insulation layer is wound around and covered and fixed outside the reinforcing layer, the second protective layer is covered and fixed outside the second heat insulation layer, the first heat insulation layer is wound around and covered and fixed outside the second protective layer, and the first protective layer is covered and fixed outside the first heat insulation layer.

[0016] The above technical solution enables the hose of this application to have two spaced-apart insulation layers, which reduces the heat transfer efficiency within the hose and provides effective insulation.

[0017] In some embodiments, the connector is made of the same material as the first protective layer and the second protective layer.

[0018] In some embodiments, the connector, the first protective layer, and the second protective layer are all made of thermoplastic polyurethane elastomer material.

[0019] Through the above technical solution, the connector, the first protective layer, and the second protective layer materials will spontaneously fuse together at a certain temperature to form an adhesive. This adhesive bonding, which relies on the inherent properties of the materials, is easily achieved in production, and the bonding strength between the thermoplastic polyurethane elastomer materials is very high. In some specific embodiments, the insulation layer and the protective layer are coated while hot, and an interlayer adhesive will form after cooling. Alternatively, the flexible tube can be heated after each insulation layer and protective layer is processed to promote the thermal fusion bonding of the thermoplastic elastomer. In other specific embodiments, the flexible tube can also be heated once after the entire flexible tube structure is coated to promote the thermal fusion bonding of the thermoplastic elastomer.

[0020] In some embodiments, a heat-reflective layer is fixed to the outer surface of the first protective layer.

[0021] In some embodiments, the heat-reflective layer is formed by coating the outer peripheral surface of the first protective layer with a heat-reflective insulating coating.

[0022] The above technical solution can reduce the heat accumulation of solar radiation energy on the surface of the hose, and prevent heat from accumulating on the surface of the hose and transferring inward.

[0023] In some embodiments, the reinforcing layer is formed by fiber weaving.

[0024] The technical solution of this application chooses to wrap the insulation layer from the outside of the reinforcement layer because the surface of the reinforcement layer has a rough woven texture, which has high frictional resistance and makes it easy for the insulation layer to form a stable connection with the reinforcement layer under the action of winding force.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] The present invention aims to provide a flattenable flexible tube with heat reflection and heat insulation functions. It features a multi-layered tube structure, which reduces the damage to the tube caused by solar radiation and heat transfer through protective and insulation layers.

[0027] Two layers of aerogel insulation are installed to reduce the efficiency of heat transfer within the tube; the aerogel insulation layer is surrounded by TPU as a connector to improve the bonding strength between the layers; the outer protective layer is coated with heat-reflective insulation paint to reduce the heat accumulation of solar radiation energy and prevent heat from accumulating and rising on the tube surface. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the hose of this utility model.

[0029] Figure 2 A front view of the aerogel felt tape forming the heat insulation layer of this utility model.

[0030] Figure 3 Left view of the aerogel felt tape forming the heat insulation layer of this utility model.

[0031] Figure label:

[0032] 1. Inner lining layer;

[0033] 2. Reinforcement layer;

[0034] 3. Insulation layer; 31. First insulation layer; 32. Second insulation layer;

[0035] 4. Aerogel felt tape; 41. Aerogel body; 42. Connector; 421. Groove;

[0036] 5. Protective layer; 51. First protective layer; 52. Second protective layer. Detailed Implementation

[0037] To make the objectives and technical solutions of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0038] This utility model provides a heat-insulating and anti-aging hose structure. By combining a protective layer and a heat-insulating layer outside the braided layer of the hose with a "glue-wire" structure, the inner lining and braided layer of the hose are insulated and protected against heat aging, thus extending the service life of the hose from heat radiation.

[0039] In a specific embodiment of this utility model, such as Figure 1 The diagram shows the overall structure of the heat-insulating and anti-aging flexible hose of this utility model. Specifically, it is a layered structure of a flexible hose, including an inner liner layer 1, a reinforcing layer 2, a heat insulation layer 3, and a protective layer 5. The inner liner layer 1 is in direct contact with the transmission medium and can be a thermoplastic polyurethane elastomer (TPU) layer. The reinforcing layer 2 is wrapped and fixed to the outside of the inner liner layer 1. The reinforcing layer 2 is made of woven fibers and is used to improve the pressure-bearing capacity of the hose. The heat insulation layer 3 includes a first heat insulation layer 31 and a second heat insulation layer 32. The protective layer 5 includes a first protective layer 51 and a second protective layer 52. The second heat insulation layer 32 is wound and wrapped around the reinforcing layer 2, and the second protective layer 52 is extruded over the second heat insulation layer 32. The first heat insulation layer 31 is wound and wrapped around the second protective layer 52, and the first protective layer 51 is extruded over the first heat insulation layer 31. The second protective layer 52 serves as an adhesive layer, connecting the first heat insulation layer 31 and the second heat insulation layer 32.

[0040] Reference Figure 2 and Figure 3 The first insulation layer 31 and the second insulation layer 32 have identical structures, both formed by wrapping a continuous aerogel felt tape 4 with a protective shell attached to the outer layer. The aerogel felt tape 4 includes an aerogel body 41 and a connector 42, with the connector 42 serving as the protective shell. A groove 421 is cut along the thickness direction at the middle position of the connector 42. The groove 421 is a blind groove, and the aerogel body 41 is embedded and bonded in the groove 421 of the connector 42, so that the aerogel body 41 has connectors 42 on both sides and the back side along its length.

[0041] Reference Figure 3 In some embodiments, the top surface of the aerogel body 41, after being fitted and fixed with the connector 42, should be on the same plane as the top surface of the connector 42 to reduce the step surface generated after the aerogel felt tape 4 is wrapped to form the heat insulation layer 3. The connector 42 is made of TPU, and the first protective layer 51 and the second protective layer 52 are also made of TPU. After the heat insulation layer 3 and the protective layer 5 are combined, the TPU materials of the interlayer will fuse together at a certain temperature to form a high-strength bond, and the TPU connector 42 on the back of the second heat insulation layer 32 will be bonded and fixed to the woven surface of the reinforcing layer 2. This bonding bonding based on the inherent properties of the materials is easy to achieve in production, and after the thermoplastic polyurethane elastomer is heated and cooled to form a bond, the connection parts of the adjacent layers fuse into one, resulting in a high bonding strength between the heat insulation layer and the reinforcing layer, and between the heat insulation layer and the protective layer. During production, the second protective layer 52 is extruded at a certain temperature, which can promote the melt bonding between the second protective layer 52 and the second heat insulation layer 32 and the first heat insulation layer 31. In some other embodiments, the tube body can be heated during the processing of the insulation layer 3 and the protective layer 5 or after all the layers of the hose have been processed, so that the materials of each layer can be melted and bonded together.

[0042] The outer surface of the first protective layer 51 is coated with a commercially available heat-reflective insulating coating to form a heat-reflective layer (not shown in the figure), which reduces the accumulation of solar radiation energy on the surface of the tube.

[0043] In the use of the heat-insulating and anti-aging flexible hose provided in this embodiment, part of the solar radiation energy is reflected through the first protective layer 51, and the heat generated by the solar radiation is blocked by two spaced aerogel insulation layers 3 during the inward conduction process, which reduces and delays the continued conduction of heat into the tube body, reduces the radiant heat that eventually reaches the reinforcing layer 2 and the inner lining layer 1, and improves the problem of solar radiation thermal aging of the tube body.

[0044] In summary, this utility model, by employing a multi-layered tube structure, reduces the damage to the tube body caused by solar radiation through the protective layer 5 and the heat insulation layer 3, thus solving the problem of tube aging caused by solar radiation in flat flexible hoses. Furthermore, the tube layer structure of this application exhibits high bonding strength, making it less prone to delamination even under long-term heat radiation, resulting in high reliability and safety.

[0045] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A heat-insulating and anti-aging flexible hose, characterized in that: It includes an inner lining layer, a reinforcing layer, a heat insulation layer, and a protective layer, which are sequentially wrapped and fixed from the inside out; The heat insulation layer is formed by wrapping an aerogel felt around the reinforcing layer. The aerogel felt includes an aerogel body and a connector, and the aerogel body is fixedly connected to the connector.

2. The heat-insulating and anti-aging flexible hose according to claim 1, characterized in that: The connectors are located on both sides of the aerogel along its length.

3. The heat-insulating and anti-aging flexible hose according to claim 2, characterized in that: The connector has a groove along its thickness direction, and the aerogel is embedded and fixed in the groove.

4. The heat-insulating and anti-aging flexible hose according to claim 3, characterized in that: The slot is a blind slot.

5. The heat-insulating and anti-aging flexible hose according to claim 1, characterized in that: The heat insulation layer includes a first heat insulation layer and a second heat insulation layer, and the protective layer includes a first protective layer and a second protective layer; The second heat insulation layer is wound around and wrapped around the outside of the reinforcing layer, the second protective layer is wrapped around and wrapped around the outside of the second heat insulation layer, the first heat insulation layer is wound around and wrapped around the outside of the second protective layer, and the first protective layer is wrapped around and wrapped around the outside of the first heat insulation layer.

6. The heat-insulating and anti-aging flexible hose according to claim 5, characterized in that: The connector is made of the same material as the first protective layer and the second protective layer.

7. The heat-insulating and anti-aging flexible hose according to claim 6, characterized in that: The connector, the first protective layer, and the second protective layer are all made of thermoplastic polyurethane elastomer material.

8. The heat-insulating and anti-aging flexible hose according to claim 5, characterized in that: A heat-reflective layer is fixed to the outer surface of the first protective layer.

9. The heat-insulating and anti-aging flexible hose according to claim 8, characterized in that: The heat-reflective layer is formed by coating the outer peripheral surface of the first protective layer with a heat-reflective insulating coating.

10. The heat-insulating and anti-aging flexible hose according to claim 1, characterized in that: The reinforcing layer is formed by fiber weaving.

Images