Stainless steel mesh explosion-proof hose

Abstract

The utility model belongs to the technical field of metal hoses, and particularly relates to a stainless steel mesh explosion-proof hose. The stainless steel mesh explosion-proof hose comprises a stainless steel metal corrugated inner pipe, an outer sleeve and a heat-insulating flame-retardant layer arranged between the stainless steel metal corrugated inner pipe and the outer sleeve, the heat-insulating flame-retardant layer is made of aerogel composite materials, and a pressure-resistant reinforcing layer is arranged between the heat-insulating flame-retardant layer and the metal corrugated inner pipe and / or between the heat-insulating flame-retardant layer and the outer sleeve. The compression-resistant reinforcing layer is made of a glass fiber composite material; the stainless steel mesh explosion-proof hose has the advantages of being good in heat insulation and flame retardant performance, simple in structure, convenient to manufacture, safe and durable.

Description

Technical Field

[0001] This utility model belongs to the technical field of stainless steel metal flexible hoses, and specifically relates to a stainless steel mesh explosion-proof flexible hose. Background Technology

[0002] Stainless steel flexible metal hoses are pipe connection and compensation devices, typically composed of weld neck flanges, bellows, fittings, and metal braided sleeves. They possess numerous excellent properties such as sealing performance, pressure resistance, high temperature resistance, corrosion resistance, and fatigue resistance, making them an indispensable elastic element in modern engineering technology.

[0003] Traditional stainless steel flexible metal hoses consist of a central stainless steel corrugated tube surrounded by a stainless steel mesh sheath. Flexible metal hoses typically operate in harsh environments. In specialized applications such as chemical production and gas pipelines, flexible metal hoses require specific properties including heat insulation, flame retardancy, pressure resistance, and explosion protection. Ordinary stainless steel mesh flexible metal hoses, due to their overly simple structure, are unsuitable for these scenarios. Utility Model Content

[0004] The purpose of this utility model is to provide a stainless steel mesh explosion-proof hose with good heat insulation and flame retardant properties, which is simple in structure, easy to manufacture, safe and durable.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A stainless steel mesh explosion-proof flexible hose includes a corrugated metal inner tube, an outer tube, and a heat-insulating and flame-retardant layer disposed between the two. The heat-insulating and flame-retardant layer is made of aerogel composite material, and a pressure-resistant reinforcing layer is provided between the heat-insulating and flame-retardant layer and the corrugated metal inner tube and / or between the heat-insulating and flame-retardant layer and the outer tube. The pressure-resistant reinforcing layer is made of glass fiber composite material.

[0007] The additional technical features constituting the above-mentioned stainless steel mesh explosion-proof flexible hose also include:

[0008] —The aerogel composite material constituting the heat insulation and flame retardant layer is a polyimide-silica composite aerogel or an aramid / graphene aerogel composite material.

[0009] —The glass fiber composite material constituting the compressive reinforcement layer is an inner lining made of impregnated glass fiber woven fabric or impregnated glass fiber bundles spirally wound, and a spring body formed by circumferentially wound spring steel wire is provided on the outside of the inner lining;

[0010] —The outer sleeve is a stainless steel wire mesh sleeve or an armor layer made of stainless steel flat strip, and a flame-retardant silicone sleeve is provided on the outside of the outer sleeve.

[0011] Compared with the prior art, the stainless steel mesh explosion-proof hose provided by this utility model has the following advantages: the metal corrugated inner tube and the outer tube of the explosion-proof hose are provided with a heat-insulating and flame-retardant layer made of aerogel composite material, and the inner and / or outer sides of the heat-insulating and flame-retardant layer are provided with a pressure-resistant reinforcing layer made of glass fiber composite material, so that the metal hose has both good heat insulation and flame retardant and pressure-resistant and explosion-proof performance; compared with traditional metal hoses, this new explosion-proof hose adds a composite layer structure composed of aerogel composite material and glass fiber composite material, the overall pipe structure is compact, the mechanical strength is high, and the interlayer is tight, which also ensures the bending flexibility of the metal hose, further improving the application range and application scenarios of the hose, and has the advantages of simple and compact structure, convenient manufacturing, safety and durability. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of a stainless steel mesh explosion-proof flexible hose according to this utility model. Detailed Implementation

[0013] The structure and working principle of the stainless steel mesh explosion-proof hose provided by this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0014] In the description of this utility model, unless otherwise stated, the terms "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0015] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "set / equipped" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0016] like Figure 1As shown, the structure of the stainless steel mesh explosion-proof hose includes a stainless steel mesh corrugated inner tube 1, an outer tube 2, and a heat-insulating and flame-retardant layer 3 disposed between the two. The heat-insulating and flame-retardant layer 3 is made of aerogel composite material. A pressure-resistant reinforcing layer 4 is provided between the heat-insulating and flame-retardant layer 3 and the corrugated inner tube 1 and / or between the heat-insulating and flame-retardant layer 3 and the outer tube 2. The pressure-resistant reinforcing layer 4 is made of glass fiber composite material.

[0017] Its working principle is as follows: a heat-insulating and flame-retardant layer 3 is provided between the stainless steel mesh corrugated inner tube 1 and the outer tube 2 of the metal hose, and a pressure-resistant reinforcing layer 4 is provided between the inner and / or outer sides of the heat-insulating and flame-retardant layer 3, thus forming a new type of tube body with a multi-layer composite structure, which enables the traditional metal hose to have both flame-retardant and heat-insulating and pressure-resistant and explosion-proof functions.

[0018] It should be noted that the heat insulation and flame retardant layer 3 is made of aerogel composite material, which, as an emerging material, has advantages such as low density, high specific surface area, low dielectric constant and ultra-low thermal conductivity; the compressive strength reinforcement layer 4 is made of glass fiber composite material, which has advantages such as corrosion resistance, high mechanical strength and easy manufacturing.

[0019] In the structure constituting the above-mentioned stainless steel mesh explosion-proof flexible hose

[0020] —The aerogel composite material constituting the above-mentioned heat-insulating and flame-retardant layer 3 is preferably a polyimide-silica composite aerogel. Polyimide (PI) has good mechanical properties, excellent chemical resistance, good dielectric properties, and high-temperature stability. Polyimide aerogel (PIA) is a three-dimensional porous material composed of cross-linked polymer molecular chains, combining the excellent properties of polyimide and traditional silica aerogel. It not only possesses the excellent characteristics of polyimide but also the outstanding features of aerogels, such as lightweight, ultra-low density, high specific surface area, low thermal conductivity, and low dielectric constant. Compared with inorganic aerogels represented by traditional silica aerogels and organic aerogels with low thermal stability, PIA has high mechanical properties, good thermal stability, and extremely low thermal conductivity.

[0021] The aforementioned aerogel composite material can also be an aramid / graphene aerogel composite material. After aramid fibers (such as Kevlar) are laminated with silica aerogel, the compressive strength is increased by 735.8%, the flexural strength is significantly improved, and at the same time, the low thermal conductivity (0.014-0.023W / mk) is maintained, making it very suitable for high-temperature insulation scenarios.

[0022] —The glass fiber composite material constituting the above-mentioned compressive reinforcement layer 4 is a lining made of impregnated glass fiber woven fabric or impregnated glass fiber bundles spirally wound. The interlayer frictional resistance of the glass fiber after impregnation (selecting flexible resin, such as flexible epoxy resin, polyurethane modified resin or thermoplastic blend system, such as GFR-PP) is small, which facilitates spiral winding and shaping, and can maintain a certain degree of flexibility.

[0023] Furthermore, the inner lining is externally provided with a spring body 5 formed by circumferentially winding spring steel wire at an angle between 60° and 70°. The spring body 5 is fitted over the pressure-resistant reinforcement layer 4, providing impact resistance and stability, further improving the overall pressure-bearing capacity of the metal hose. After the hose is impacted by external force, the spring body 5 deforms and rebounds, preventing crushing and collapse, thus ensuring the metal hose can work safely under both positive and negative pressure. Moreover, the spring body 5, in conjunction with the pressure-resistant reinforcement layer 4, provides better bending flexibility and dynamic bending performance, ensuring reliable performance and a long service life. Due to the uniform circumferential winding of the spring, the strength of the metal hose is significantly improved, with a pressure-bearing capacity of 10-20 MPa and a burst pressure of 25-35 MPa.

[0024] — Preferably, the outer sleeve 2 is a stainless steel wire mesh sleeve or an armor layer made of stainless steel flat strip, which is resistant to stretching and tearing and wear, so as to strengthen the external protection of the metal hose and extend the service life of the fitting. The outer sleeve 2 is provided with a flame-retardant silicone sleeve 6, which is more suitable for high-temperature scenarios.

[0025] The above-described embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit the implementation of this utility model. Therefore, any other modifications or equivalent substitutions to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A stainless steel mesh explosion-proof hose comprising a stainless steel metal corrugated inner tube, an outer sleeve tube and a heat-insulating flame-retardant layer arranged therebetween, characterized in that: The heat-insulating and flame-retardant layer is made of aerogel composite material. A compressive strength layer is provided between the heat-insulating and flame-retardant layer and the metal corrugated inner tube and / or between the heat-insulating and flame-retardant layer and the outer tube. The compressive strength layer is made of glass fiber composite material.

2. A burst resistant hose of stainless steel mesh according to claim 1, characterised in that: The aerogel composite material constituting the heat insulation and flame retardant layer is a polyimide-silica composite aerogel or an aramid / graphene aerogel composite material.

3. A burst resistant hose of stainless steel mesh according to claim 1, characterised in that: The glass fiber composite material constituting the compressive strength layer is an inner lining made of impregnated glass fiber woven fabric or impregnated glass fiber bundles spirally wound, and a spring body formed by circumferentially wound spring steel wire is provided on the outside of the inner lining.

4. A burst resistant hose of stainless steel mesh according to claim 1, characterized in that: The outer sleeve is a stainless steel wire mesh sleeve or an armor layer made of stainless steel flat strip, and a flame-retardant silicone sleeve is provided on the outside of the outer sleeve.

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