CN210484860U - High-pressure-resistant composite fluorine rubber hose - Google Patents

Abstract

The utility model belongs to the technical field of compound pipeline, specific saying relates to a compound fluorine glue hose of high pressure resistant, high pressure delivery conditions such as specially adapted aerospace, nuclear industry, military industry. The main technical scheme is as follows: the pipe body comprises an inner rubber layer, a middle rubber layer and an outer rubber layer which are made of perfluoro rubber, an inner framework layer and an outer framework layer are respectively arranged between the inner rubber layer and the middle rubber layer and between the middle rubber layer and the outer rubber layer, the inner framework layer and the outer framework layer are both formed by woven meshes, and reinforcing layers which are spirally wound are arranged on the inner side and/or the outer side of the middle rubber layer. The novel high-pressure-resistant composite fluorine rubber hose has the characteristics of high structural strength, reliable and stable working performance, and is particularly suitable for high-pressure-resistant, high-temperature-resistant and strong-medium-resistant conveying.

Description

High-pressure-resistant composite fluorine rubber hose

Technical Field

The utility model belongs to the technical field of compound pipeline, specific saying relates to a high pressure resistant compound fluorine rubber hose, high pressure delivery conditions such as specially adapted military project, space flight trade.

Background

The fluorine hose is made of synthetic rubber containing fluorine atoms. The application field of the method relates to multiple disciplines such as nuclear physics, chemistry, materials science, heat transfer science and the like. The fluorine rubber hose has high temperature resistance, oil resistance, excellent weather resistance and ageing resistance, excellent vacuum performance and physical and mechanical performance, has particularly outstanding electrical insulation performance and resistance to corrosion of various chemical media, and is an indispensable material for advanced scientific and technological technologies of modern aviation, missiles, rockets, space navigation, nuclear industry and the like. In recent years, with the increasing requirements of the military industry on reliability, safety and the like, the application amount of the fluorine rubber hose is rapidly increased.

At present, a seamless steel pipe serving as a main conveying pipeline is not matched with a nonmetal hose for use, the pipeline has complex use environment and harsh conditions and has the characteristic requirements of high temperature, high pressure, flattening resistance, sealing, multiple medium resistance and the like, although the steel pipe can meet the performance requirements, the pipeline is heavy, the transportation, installation and construction laying are very inconvenient, an elbow needs to be additionally arranged for welding in pipeline connection, and the steel pipe is easy to corrode and rust in the open air for a long time.

Aiming at the problems, the fluorine rubber hose replaces a steel pipe to be used as a matched pipe fitting on more and more occasions, the common fluorine rubber hose is processed by adopting a high-performance fluorine rubber high polymer material and is mostly a high-temperature-resistant and medium-corrosion-resistant pure rubber pipe or a low-pressure pipeline structure design, but the fluorine rubber hose has a simple structure, the pipe wall is lack of a supporting framework with enough strength, the pressure-bearing capacity is not high, and the medium conveying in the harsh environment of the military industry such as aviation, aerospace, nuclear industry and the like can not be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a novel high pressure resistant compound fluorine rubber hose that structural strength is high, working property is stable, and specially adapted high pressure is carried.

In order to achieve the above object, the utility model adopts the following technical scheme:

a high-pressure-resistant composite fluorine rubber hose comprises an inner rubber layer, a middle rubber layer and an outer rubber layer, wherein the inner rubber layer, the middle rubber layer and the outer rubber layer are made of perfluoro rubber, an inner framework layer and an outer framework layer are respectively arranged between the inner rubber layer and the middle rubber layer and between the middle rubber layer and the outer rubber layer, the inner framework layer and the outer framework layer are respectively formed by woven meshes, and a spiral winding reinforcing layer is arranged on the inner side and/or the outer side of the middle rubber layer or the inner side of the middle rubber layer.

The additional technical characteristics of the high-pressure-resistant composite fluorine rubber hose further comprise:

-the braiding angle of the braiding mesh constituting the inner carcass layer is less than 54 ° 44'; the weaving angle of the weaving net forming the outer framework layer is more than 54 degrees and 44';

-the braiding angle of the braiding mesh constituting the inner carcass layer is between 52 ° and 54 °; the braiding angle of the braiding net forming the outer skeleton layer is 55-57 degrees;

the mesh fabric constituting the inner and outer carcass layers is made of steel wires or high-strength synthetic fibers, and the reinforcement layer is made of steel wires wound helically;

bonding layers made of special fluororubber adhesives are coated on the woven meshes forming the inner framework layer and the outer framework layer and are respectively used for bonding the inner rubber layer and the middle rubber layer as well as the middle rubber layer and the outer rubber layer;

the end part of the pipe body is provided with a CF vacuum flange joint consisting of a flange body and a sealing copper ring.

The utility model provides a compound fluorine rubber hose of high pressure resistant compares with prior art, has following advantage: because the inner skeleton layer and the outer skeleton layer are respectively arranged between the inner rubber layer and the middle rubber layer and between the middle rubber layer and the outer rubber layer of the novel high-pressure resistant composite fluorine rubber hose, the inner skeleton layer and the outer skeleton layer are both formed by the woven mesh, namely, the inner skeleton and the outer skeleton formed by the woven mesh form a double-layer composite structure reinforcing layer, the structural strength of the fluorine rubber hose is enhanced, the bearing capacity of a pipeline is improved, the whole weight is light and handy, the hose can be coiled by a curve, and the spiral winding reinforcing layer is easily arranged at the inner side and/or the outer side of the middle rubber layer to form a pipe skeleton support, so that the fluorine rubber hose has reliable performance and long service life, can adapt to different complex topographic environments and severe service conditions, has excellent performances of high temperature resistance, high pressure resistance, flattening resistance, high sealing, multiple chemical media resistance, weather resistance and the like, can be used for a long time at 250 ℃, can be used for a short time at 300, the tube body still maintains and has good physical and mechanical properties. Becomes a novel substitute product of the existing matched steel pipe.

Drawings

Fig. 1 is a cross-sectional view of the side of the pipe wall of the high pressure resistant composite fluorine rubber hose of the present invention.

Detailed Description

The structure and the working principle of the high pressure resistant composite fluorine rubber hose provided by the present invention will be further described in detail with reference to the accompanying drawings.

Referring to fig. 1, the present invention provides a cross-sectional view of the side of the tube wall of the high pressure resistant composite fluorine rubber hose. The pipe body structure of the high-pressure-resistant composite fluorine rubber hose comprises an inner rubber layer 1, a middle rubber layer 2 and an outer rubber layer 3, wherein the inner rubber layer 1 is made of perfluoro rubber, the middle rubber layer 2 is made of perfluoro rubber, an inner framework layer 4 and an outer framework layer 5 are respectively arranged between the inner rubber layer 1 and the middle rubber layer 2 and between the middle rubber layer 2 and the outer rubber layer 3, the inner framework layer 4 and the outer framework layer 5 are respectively formed by woven meshes, and a spiral winding reinforcing layer 6 is arranged on the inner side and/or the outer side of the middle rubber layer 2 or inside the middle.

230 ℃ for 24h (to ensure gradual heating, after reaching 230 ℃, keeping the constant temperature for time). Wherein, including glue film 1 and well glue film 2, set up inner frame layer 4 and outer frame layer 5 that constitute by the braided mesh respectively between well glue film 2 and the outer glue film 3, form double-deck composite construction enhancement layer for the structural strength of reinforcing hose, and set up spiral winding's enhancement layer 6 in the inboard and/or the outside of well glue film 2, form the body skeleton and support, make the fluorine rubber hose have negative pressure resistant when effectively bearing inside delivery pressure, anti external pressure ability, use reliably stably. 165 at 170 ℃ for 10 min; the working principle of the second-stage vulcanization is as follows: the hose body of the fluorine rubber hose is composed of an inner rubber layer 1, a middle rubber layer 2 and an outer rubber layer 3 which are made of perfluoro rubber, the processing process, the using equipment and the processing method of the fluorine rubber are the same as those of common rubber, the mooney viscosity of the fluorine rubber is higher, the processing flowability of rubber materials is correspondingly influenced, the rubber materials are plasticated, matched and mixed to a lower piece, and the hose structure is formed by extruding, calendaring, weaving, winding and the like of the rubber materials. The fluorine rubber vulcanization is carried out in two times: one stage vulcanization

In the structure of the novel high-pressure resistant composite fluorine rubber hose,

in order to further improve the framework supporting effect of the braided layer, the braiding angle of the braided net forming the inner framework layer 4 is less than 54 degrees 44'; the knitting angle of the knitting net forming the outer framework layer 5 is larger than 54 degrees 44', according to the balance angle collocation principle, 54 degrees 44' is set to be the optimal balance knitting angle, the knitting angle of the inner framework layer 4 is slightly smaller than the balance angle, the knitting angle of the outer framework layer 5 is slightly larger than the balance angle, when the pipe body bears pressure, the pipe body is guaranteed to expand inwards and contract outwards, the pipe body is mainly restrained by the force applied by the outer framework layer 5, the stress of the outer framework layer is transmitted layer by the inner layer, the synergistic stress of the framework layers is realized, and the pressure-bearing supporting function is fully exerted;

further, in order to obtain the best effect, the knitting angle of the knitting net constituting the inner frame layer 4 is between 52 ° and 54 °, and the best angle is about 53 °; the braiding angle of the braiding net forming the outer framework layer 5 is 55-57 degrees, the optimal angle is about 56 degrees, the angles of all layers are matched to form a stable structure with a balance angle of 54-44 degrees, the resultant force direction of the axial internal pressure and the circumferential expansion force of the hose is consistent with the braiding direction of the framework, so that the hose body achieves mechanical balance, the structure of the hose is transited from an unbalanced state to dynamic balance after the hose bears pressure, and the working reliability and stability of the fluorine hose are enhanced;

preferably, the woven mesh forming the inner skeleton layer 4 and the outer skeleton layer 5 is made of steel wires or high-strength synthetic fibers, and the reinforcing layer 6 is made of steel wires by spirally winding, so that the advantages of convenient material taking, simple processing technology and low manufacturing cost are achieved;

the woven nets forming the inner framework layer 4 and the outer framework layer 5 are coated with bonding layers formed by special fluororubber adhesives and are respectively used for bonding the inner rubber layer 1 and the middle rubber layer 2, the middle rubber layer 2 and the outer rubber layer 3, and in the manufacturing and forming process of the fluororubber hose, due to the fact that mooney viscosity of fluororubber is high, processing flowability of rubber materials is poor, the adhesiveness between extruded fluororubber and steel wires and various framework materials is poor, in order to give consideration to the overall structure and compressive strength of the hose, the linear density of the woven layers can be reduced in the design of a steel wire woven structure, mutual filling and permeation among the rubber layers are guaranteed, and self-adhesion and mutual adhesion physical bonding effects among the rubber layers are achieved; the surface of the copper-plated steel wire and the spiral steel wire can be pretreated by coating a special adhesive for fluororubber, so that the chemical bonding effect of the steel wire and the inner, middle and outer fluororubber layers is achieved.

The whole process technical route is as follows: core bar surface treatment (coating of special release agent for fluororubber) → extrusion of inner rubber layer 1 (perfluorosynthetic rubber) → steel wire mesh grid of inner skeleton layer 4 (coating of special adhesive for fluororubber on the steel wire surface) → filling of middle rubber layer 2 (perfluorosynthetic rubber) → winding of spiral steel wire forming reinforcing layer 6 (coating of special adhesive for fluororubber on the steel wire surface) → filling of middle rubber layer 2 (perfluorosynthetic rubber) → steel wire braid layer of outer skeleton layer 5 (coating of special adhesive for fluororubber on the steel wire surface) → coating of outer rubber layer 3 (perfluorosynthetic rubber) → winding of cloth → vulcanization (one stage) → release of cloth → core removal/rod removal → vulcanization (two stage) → inner wall treatment → crimping joint → helium mass spectrum leak detection → joint protective sheath;

the end of the pipe body is provided with a CF vacuum flange joint consisting of a flange body and a sealing copper ring. Flange seal materials are typically Viton, PTFE, oxygen free copper, etc., and flanges are typically 304, 316 stainless steel, etc. The inner side of the CF vacuum flange joint is provided with a raised sharp knife edge, the aim of sealing vacuum is achieved by extruding an oxygen-free copper gasket (or other soft metals) to deform the oxygen-free copper gasket, the CF vacuum flange joint is a sealing mode of all metal materials, and the CF vacuum flange joint is widely applied to an ultrahigh vacuum system and has the applicable vacuum degree of 10-12 mbar. The material of the flange is mainly SUS304 (or SUS304L), because the gas emission of SUS304 is less, the processing and welding are easier; furthermore, when the CF vacuum flange is used, the MoS2 must be coated on bolts to prevent the bolts and nuts from being occluded and clamped, the peripheries of the flanges need to be aligned, the flange surfaces need to keep a certain distance, and a space is reserved for continuously tightening the bolts after baking. The knife edge of the CF vacuum flange needs to cut into a metal sealing ring to realize vacuum sealing, or an IPD metal sealing ring is used, and the IPD metal sealing ring is not dependent on the knife edge of the flange but dependent on the inclined plane at the periphery of the knife edge to realize vacuum sealing.

Claims (6)

1. The utility model provides a compound fluorine hose of high pressure resistant which characterized in that: the pipe body comprises an inner rubber layer, a middle rubber layer and an outer rubber layer which are made of perfluoro rubber, an inner framework layer and an outer framework layer are respectively arranged between the inner rubber layer and the middle rubber layer and between the middle rubber layer and the outer rubber layer, the inner framework layer and the outer framework layer are both formed by woven meshes, and a spiral wound reinforcing layer is arranged on the inner side and/or the outer side of the middle rubber layer or in the middle rubber layer.

2. The high pressure resistant composite fluorine rubber hose according to claim 1, characterized in that: the weaving angle of the weaving net forming the inner framework layer is less than 54 degrees and 44'; the braiding angle of the braided mesh constituting the exoskeleton layer is greater than 54 degrees 44'.

3. The high pressure resistant composite fluorine rubber hose according to claim 2, characterized in that: the knitting angle of the knitting net forming the inner framework layer is between 52 degrees and 54 degrees; the braiding angle of the braided mesh constituting the exoskeleton layer is between 55 and 57 degrees.

4. The high pressure resistant composite fluorine rubber hose according to claim 1, characterized in that: the braided mesh forming the inner skeleton layer and the outer skeleton layer is made of steel wires or high-strength synthetic fibers, and the reinforcing layer is made of steel wires in a spiral winding mode.

5. The high pressure resistant composite fluorine rubber hose according to claim 1 or 4, characterized in that: and adhesive layers formed by special fluororubber adhesives are coated on the woven meshes forming the inner framework layer and the outer framework layer and are respectively used for bonding the inner adhesive layer and the middle adhesive layer as well as the middle adhesive layer and the outer adhesive layer.

6. The high pressure resistant composite fluorine rubber hose according to claim 1, characterized in that: the end of the pipe body is provided with a CF vacuum flange joint consisting of a flange body and a sealing copper ring.

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