Automobile fuel hose with good heat-resistant effect

Abstract

The utility model relates to the technical field of rubber tubes, and discloses an automobile fuel rubber tube with a good heat-resistant effect, which comprises a rubber tube body, a tubular inner rubber layer arranged on the innermost side of the rubber tube body, and a corrugated outer rubber layer arranged on the outermost side of the rubber tube body, vulcanization synthesis layers generated by vulcanization are fixed on the inner side surfaces of the inner rubber layer and the outer rubber layer, and the inner rubber layer is made of a fluororubber material containing fluororubber, a polyol vulcanizing agent, a polyol vulcanization accelerator, magnesium oxide and calcium hydroxide; and the outer rubber layer is prepared from an acrylate rubber material containing acrylate rubber and at least one of an imidazole compound and a diamine vulcanizing agent. The automobile fuel rubber tube with the good heat-resistant effect is provided with the vulcanization synthesis layer, the vulcanization synthesis layer is prepared through secondary vulcanization for thirty minutes and four hours in the environment of 160 DEG C, the interlayer bonding strength of the inner rubber layer and the outer rubber layer can be effectively improved, and interface aging at the position of the inner rubber layer is not prone to occurring after thermal aging.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber hoses, in particular to an automobile fuel rubber hose with good heat resistance effect. Background Art

[0002] Hose is a kind of tubular rubber product used to transport gas, liquid, slurry or granular materials. When used in the automotive field, since the air introduced from the turbocharger to the intercooler and the engine is high-temperature and high-pressure air, the hose material that transports this air is required to have good interlayer adhesion and high heat resistance.

[0003] After searching, we found a tear-resistant, corrosion-resistant, oil-resistant automobile fuel hose with publication number CN211335576U, which is used to solve the problem of oil leakage and loss of sealing effect at the hose joint under high pressure, high temperature and high pulse conditions. The utility model adopts a middle rubber layer made of nitrile rubber to bond the inner rubber layer and the outer rubber layer. The bonding effect is easily affected by high temperature, and the inner rubber layer and the outer rubber layer are easily separated and fallen off at high temperature. Therefore, we propose an automobile fuel hose with good heat resistance. Utility Model Content

[0004] The utility model aims to provide an automobile fuel hose with good heat resistance effect to solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automobile fuel hose with good heat resistance, comprising:

[0006] The hose body has a tubular inner rubber layer at its innermost side and a corrugated outer rubber layer at its outermost side. The inner surfaces of the inner rubber layer and the outer rubber layer are fixed with a vulcanized synthetic layer produced by vulcanization.

[0007] Furthermore, the inner rubber layer is provided with an annular hoop inside, and the hoop is evenly distributed along the inner rubber layer at equal intervals. The outer walls of the four corners of the hoop are penetrated by steel reinforcing wires, and the reinforcing wires are symmetrically arranged about the central axis of the hoop.

[0008] Furthermore, the inner rubber layer is made of a fluororubber compound containing fluororubber, a polyol vulcanizing agent, a polyol vulcanization accelerator, magnesium oxide and calcium hydroxide, and the outer rubber layer is made of an acrylate rubber compound containing acrylate rubber and at least one of an imidazole compound and a diamine vulcanizing agent.

[0009] Furthermore, the vulcanized synthetic layer is made by co-vulcanizing the fluororubber of the inner layer and the acrylic rubber of the outer layer through a vulcanization reaction, and the inner rubber layer is bonded to the outer rubber layer through the vulcanized synthetic layer.

[0010] Furthermore, fan-shaped rubber sheets are fixed to the outer walls of both sides of the hose body, and the outer walls of the rubber sheets are provided with connecting holes.

[0011] Furthermore, the rubber sheets are symmetrically bonded to the outer walls of both sides of the hose body by thermoplastic bonding, and the rubber sheets are evenly distributed along the outer walls of both sides of the hose body at equal distances.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The automobile fuel hose with good heat resistance is provided with a vulcanized synthetic layer, which is made by secondary vulcanization for thirty minutes and four hours in an environment of 160°, which can effectively improve the interlayer bonding strength between the inner rubber layer and the outer rubber layer, and after heat aging, it is not easy to produce interface aging at the inner rubber layer, and has good dynamic heat resistance and durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main structure of the hose body of the utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the hose body of the utility model;

[0016] Figure 3 It is a schematic diagram of the cross-sectional plan structure of the hose body of the utility model.

[0017] In the figure: 1. Hose body; 2. Inner rubber layer; 3. Outer rubber layer; 4. Vulcanized synthetic layer; 5. Hoop; 6. Reinforcement wire; 7. Rubber sheet; 8. Connection hole. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] The utility model provides an automobile fuel hose with good heat resistance through improvement. Figure 1-Figure 3, comprising: a hose body 1, a tubular inner rubber layer 2 is arranged on the innermost side of the hose body 1, the inner rubber layer 2 is made of a fluororubber rubber compound containing fluororubber, a polyol vulcanizing agent, a polyol vulcanizing accelerator, magnesium oxide and calcium hydroxide, a corrugated outer rubber layer 3 is arranged on the outermost side of the hose body 1, the outer rubber layer 3 is made of an acrylate rubber compound containing acrylate rubber and at least one of an imidazole compound and a diamine vulcanizing agent, the corrugated outer rubber layer 3 is convenient for increasing the heat dissipation surface area of ​​the hose body 1 when transporting a medium with high heat, improving the heat dissipation capacity, and thus improving the heat resistance; a vulcanized synthetic layer 4 produced by vulcanization is fixed on the inner side surfaces of the inner rubber layer 2 and the outer rubber layer 3, and the vulcanized synthetic layer 4 makes the inner layer of fluororubber and the outer layer of acrylate rubber co-vulcanized through a vulcanization reaction The inner rubber layer 2 is bonded to the outer rubber layer 3 through the vulcanized synthetic layer 4. The vulcanized synthetic layer 4 is made by secondary vulcanization for thirty minutes and four hours under a 160° environment, which can effectively improve the interlayer bonding strength between the inner rubber layer 2 and the outer rubber layer 3. After thermal aging, it is not easy to cause interface aging at the inner rubber layer 2, and the dynamic heat resistance and durability are good. The inner rubber layer 2 is provided with an annular hoop 5, and the hoop 5 is evenly distributed along the inner rubber layer 2. The outer walls of the four corners of the hoop 5 are pierced with steel reinforcing wires 6, and the reinforcing wires 6 are symmetrically arranged about the central axis of the hoop 5. The hoop 5 and the reinforcing wires 6 are used to improve the structural strength of the hose body 1 to prevent the hose body 1 from being broken or damaged due to vehicle shaking or environmental changes after installation.

[0020] See also Figure 1 A fuel hose for automobile with good heat resistance comprises: fan-shaped rubber sheets 7 are fixed to the outer walls of both sides of the hose body 1, the rubber sheets 7 are symmetrically bonded to the outer walls of both sides of the hose body 1 by thermoplastics, and the rubber sheets 7 are evenly distributed along the outer walls of both sides of the hose body 1 at equal distances, and the rubber sheets 7 connected to the hose body 1 by thermoplastics are used to provide auxiliary connection structures on both sides of the hose body 1; the outer wall of the rubber sheet 7 is provided with connection holes 8, and the connection holes 8 are used to provide anchor points through the rubber sheet 7, so that when the staff installs the hose, they can conveniently use tools such as fasteners to connect and fix the hose body 1, thereby improving the convenience of installing the hose body 1 on the vehicle body.

[0021] Working principle: For this type of automobile fuel hose with good heat resistance, first, the inner rubber layer 2 of the hose body 1 is made of fluororubber rubber containing fluororubber, polyol vulcanizing agent, polyol vulcanization accelerator, magnesium oxide and calcium hydroxide. The fluororubber used is VDF / HFP copolymer (the mass ratio of VDE / HFP is 60:40, and the fluorine content is 66%), the polyol vulcanizing agent used is bisphenol AF, the polyol vulcanization accelerator used is DBU-B, and the carbon black used is SRF carbon black. The outer rubber layer 3 is made of acrylate rubber rubber containing at least one of acrylate rubber and imidazole compounds and diamine vulcanizing agents. The acrylate rubber used is a copolymer of ethyl acrylate, butyl acrylate and glycidyl methacrylate (the mass fraction ratios are 59.5%, 40.0% and 0.5% respectively), the antioxidant used is DFC-34, the carbon black used is MAF carbon black, and the The plasticizer used is RS-735, the imidazole compound used is SN-25, the thiourea compound used is trimethylthiourea, and the quaternary ammonium salt used is tetraethylammonium bromide. Subsequently, the vulcanized synthetic layer 4 of the hose body 1 is made by co-vulcanizing the fluororubber of the inner rubber layer 2 and the acrylic rubber of the outer rubber layer 3 through a vulcanization reaction. After secondary vulcanization at 160° for thirty minutes and four hours, the inner rubber layer 2 and the outer rubber layer 3 are bonded to improve the bonding strength between the inner rubber layer 2 and the outer rubber layer 3, so that the hose body 1 is not prone to interface aging at the inner rubber layer 2 after high temperature and heat aging, and has good dynamic durability. The hoop 5 and the reinforcing wire 6 penetrated inside the hose body 1 can further improve the structural strength of the hose body 1 and resist pulling and tearing damage. Finally, the thermoplastic cured film 7 and the connecting hole 8 on the outer wall of both sides of the hose body 1 are used to provide anchor points during installation, so as to facilitate the stable installation of the hose body 1.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fuel hose for automobile with good heat resistance, characterized in that: include: A hose body (1), wherein a tubular inner rubber layer (2) is arranged at the innermost side of the hose body (1), a corrugated outer rubber layer (3) is arranged at the outermost side of the hose body (1), and a vulcanized synthetic layer (4) produced by vulcanization is fixed to the inner surfaces of the inner rubber layer (2) and the outer rubber layer (3).

2. The automobile fuel hose with good heat resistance according to claim 1, characterized in that: An annular hoop (5) is arranged inside the inner rubber layer (2), and the hoop (5) is evenly distributed at equal distances along the inner rubber layer (2). Steel reinforcing wires (6) are passed through the outer walls of the four corners of the hoop (5), and the reinforcing wires (6) are symmetrically arranged about the central axis of the hoop (5).

3. The automobile fuel hose with good heat resistance according to claim 1, characterized in that: The vulcanized synthetic layer (4) is made by co-vulcanizing an inner layer of fluororubber and an outer layer of acrylic rubber through a vulcanization reaction, and the inner rubber layer (2) is bonded to the outer rubber layer (3) through the vulcanized synthetic layer (4).

4. The automobile fuel hose with good heat resistance according to claim 1, characterized in that: Sector-shaped rubber sheets (7) are fixed to the outer walls of both sides of the rubber hose body (1), and the outer walls of the rubber sheets (7) are provided with connection holes (8).

5. The automobile fuel hose with good heat resistance according to claim 4, characterized in that: The film (7) is symmetrically bonded to the outer walls of both sides of the hose body (1) by thermoplastic bonding, and the film (7) is evenly distributed at equal distances along the outer walls of both sides of the hose body (1).

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