阅读说明：本技术 一种耐高温高盐环境的柔性管路 (Flexible pipeline resistant to high-temperature and high-salt environment ) 是由 高荣军 邢晓斌 党彦明 田会平 翟东 时洪宇 胡志强 陈跃霞 庞旭辉 杨美萍 于 2021-05-14 设计创作，主要内容包括：本发明属于航空技术领域,公开了一种耐高温高盐环境的柔性管路。包括：套筒、接头、内管、增强层和护套；内管用于传输液体工作介质,所述内管外部设有增强层；所述增强层外部设有护套；所述套筒设于增强层与护套之间；接头一端设有心轴,所述心轴插入内管,所述心轴与所述套筒配合用于固定内管和增强层；接头另一端设有凸台,所述接头内部设有通孔；所述通孔用于在内管和凸台之间传输液体工作介质；凸台设有外螺纹,所述凸台用于与内螺纹接口连接。本发明克服了传统航标软管使用周期短、老化快、维护量大等缺点。(The invention belongs to the technical field of aviation, and discloses a flexible pipeline resistant to high-temperature and high-salt environments. The method comprises the following steps: the sleeve, the joint, the inner pipe, the reinforcing layer and the sheath; the inner pipe is used for transmitting a liquid working medium, and a reinforcing layer is arranged outside the inner pipe; a sheath is arranged outside the enhancement layer; the sleeve is arranged between the enhancement layer and the sheath; a mandrel is arranged at one end of the joint, the mandrel is inserted into the inner pipe, and the mandrel is matched with the sleeve to fix the inner pipe and the reinforcing layer; the other end of the joint is provided with a boss, and a through hole is formed in the joint; the through hole is used for transmitting liquid working medium between the inner pipe and the boss; the boss is equipped with the external screw thread, the boss is used for with internal thread interface connection. The invention overcomes the defects of short service cycle, quick aging, large maintenance amount and the like of the traditional navigation mark hose.)

1. The utility model provides a flexible pipeline of high temperature resistant high salt environment which characterized in that: the pipeline includes: the device comprises a metal connecting piece, an inner pipe, a reinforcing layer and a sheath;

the inner pipe is used for transmitting a liquid working medium, and a reinforcing layer is arranged outside the inner pipe; a sheath is arranged outside the enhancement layer;

the metal connecting pieces are arranged on two sides of the inner pipe and used for being connected with an upper connector of the machine.

2. The flexible pipeline capable of resisting high-temperature and high-salt environments according to claim 1, wherein: the metal connecting member includes: a sleeve and a joint;

the sleeve is arranged between the enhancement layer and the sheath;

a mandrel is arranged at one end of the joint, the mandrel is inserted into the inner pipe, and the mandrel is matched with the sleeve to fix the inner pipe and the reinforcing layer;

a boss is arranged at the other end of the joint, and a through hole is formed in the joint; the through hole is used for transmitting liquid working medium between the inner pipe and the boss;

the boss is provided with external threads and is used for being connected with the internal thread interface.

3. The flexible pipeline capable of resisting high-temperature and high-salt environments as claimed in claim 2, wherein: the metal connecting piece also comprises a nut; the nut is connected with the boss at one end of the joint, the nut is provided with an internal thread, and the nut is used for being connected with the external thread interface.

4. The flexible pipeline capable of resisting high-temperature and high-salt environments as claimed in claim 2, wherein: the mandrel and the sleeve are connected by adopting an inserting and buckling structure.

5. The flexible pipeline capable of resisting high-temperature and high-salt environments according to claim 1, wherein: the inner tube is a conductive polytetrafluoroethylene inner tube.

6. The flexible pipeline capable of resisting high-temperature and high-salt environments according to claim 1, wherein: the reinforcing layer is a steel wire reinforcing layer; the steel wire reinforcing layer is manufactured in a winding and weaving mode.

7. The flexible pipeline capable of resisting high-temperature and high-salt environments according to claim 1, wherein: the sheath includes: and the silicon rubber fireproof sleeve is sleeved outside the enhancement layer.

8. The flexible pipeline capable of resisting high-temperature and high-salt environments according to claim 7, wherein: the sheath further comprises: the wear-resistant protective sleeve is arranged outside the silicon rubber fireproof sleeve.

Technical Field

The invention belongs to the technical field of aviation, and particularly relates to a flexible pipeline resistant to high-temperature and high-salt environments.

Background

With the development of aerospace technology, the traditional flexible connecting pipeline of an aerospace craft, namely a rubber hose, is gradually exposed to the defects of easy aging, high flow resistance, short service life, large later maintenance amount and the like, and with increasingly harsh operating environment, the flexible pipeline of a fluid system cannot meet the requirement of reducing maintenance workload of an airplane under the condition of adapting to the harsh operating environment.

With the improvement of the technical level of non-metal materials and processing technology and the particularity, diversity and outfield maintenance requirements of special airplanes, the requirements of high reliability, long service life and high safety are provided for the pipeline of the airplane fluid system so as to meet the requirement that the flexible pipeline of the airplane fluid system adapts to the harsh working environment.

Disclosure of Invention

The invention overcomes the defects in the prior art, provides a flexible pipeline technology with high reliability, long service life and multiple media for an airplane fluid system, and improves the safety and reliability of the airplane.

The technical scheme of the invention is as follows:

a flexible pipe resistant to high temperature and high salt environments, comprising: the device comprises a metal connecting piece, an inner pipe, a reinforcing layer and a sheath;

the inner pipe is used for transmitting a liquid working medium, and a reinforcing layer is arranged outside the inner pipe; a sheath is arranged outside the enhancement layer;

the metal connecting pieces are arranged on two sides of the inner pipe and used for being connected with an upper connector of the machine.

Further, the metal connection member includes: a sleeve and a joint;

the sleeve is arranged between the enhancement layer and the sheath;

a mandrel is arranged at one end of the joint, the mandrel is inserted into the inner pipe, and the mandrel is matched with the sleeve to fix the inner pipe and the reinforcing layer;

a boss is arranged at the other end of the joint, and a through hole is formed in the joint; the through hole is used for transmitting liquid working medium between the inner pipe and the boss;

the boss is provided with external threads and is used for being connected with the internal thread interface.

Further, the metal connecting piece also comprises a nut; the nut is connected with the boss at one end of the joint, the nut is arranged in the internal thread, and the nut is used for being connected with the external thread interface.

Furthermore, the mandrel and the sleeve adopt an insertion buckling structure. The connection reliability and the sealing performance are good;

further, the inner pipe is a conductive polytetrafluoroethylene inner pipe. Fluid static electricity is eliminated, system safety is improved, and airplane safety and reliability are improved;

further, the reinforcing layer is a steel wire reinforcing layer; the steel wire reinforcing layer is manufactured in a winding and weaving mode.

Further, the sheath includes: and the silicon rubber fireproof sleeve is sleeved outside the enhancement layer. Has good fireproof performance and meets the requirement of the airplane on the harsh working environment.

Further, the sheath further comprises: the wear-resistant protective sleeve is arranged outside the silicon rubber fireproof sleeve.

The invention provides a flexible pipeline technology with high reliability, long service life and multiple media for an airplane fluid system, which has the following effects:

the service life of the hose reaches 10 years, the service life of the hose is effectively prolonged, the service life of the hose is equivalent to the first turning period of a machine body, the maintenance workload of an outfield is reduced, and the problem that the service life of the existing flexible pipeline is short (3 years in a high-temperature area and 6 years in other areas) is solved;

the heat-resistant temperature is high, the temperature of the working solution is-55 to +150 ℃, and the requirements of the working environment (the working temperature is-55 to +100 ℃) for the use of the existing flexible pipeline are improved;

the thermal stability is high, and the inner pipe is made of T62 resin, so that the inner pipe has the characteristics of high and low temperature impact resistance and low aging resistance;

the bending fatigue resistance is high, and a perfluoro-belt alkyl vinyl ether side chain is introduced into a polytetrafluoroethylene molecular chain structure, so that the original molecular arrangement state is broken, the crystallinity is reduced, and the flexibility and the toughness are improved;

the salt spray test time is 96h, and the working requirements of the system in severe environments such as high temperature, high humidity and high salt of islands are met.

The requirements of liquid fluid on multiple media are met, and the device is suitable for system pipelines of hydraulic pressure, fuel oil, lubricating oil and the like.

Drawings

FIG. 1 is a schematic view of a flexible pipeline structure with an internal threaded pipe interface;

FIG. 2 is a schematic diagram of a flexible pipe structure with an external thread pipe joint;

in the figure, 1-nut, 2-joint, 3-sleeve, 4-reinforcement layer, 5-inner tube, 6-sheath.

Detailed Description

The flexible pipeline technology is composed of a conductive polytetrafluoroethylene inner pipe, a stainless steel reinforcing layer, a metal connecting piece, a silicon rubber fireproof sleeve, an anti-abrasion sheath and the like.

Example 1

As shown in fig. 1; a flexible pipe resistant to high temperature and high salt environments, comprising: a metal connecting piece, an inner pipe 5, a reinforcing layer 4 and a sheath 6; the inner pipe 5 is used for transmitting a liquid working medium, and a reinforcing layer 4 is arranged outside the inner pipe; the reinforcement layer is externally provided with a sheath 6. The metal connecting member includes: a sleeve 3 and a joint 2; the sleeve 3 is arranged between the reinforcing layer 4 and the sheath 6; a mandrel is arranged at one end of the joint 2, the mandrel is inserted into the inner pipe, and the mandrel is matched with the sleeve 3 to fix the inner pipe and the reinforcing layer; a boss is arranged at the other end of the joint 2, and a through hole is formed in the joint 2; the through hole is used for transmitting liquid working medium between the inner pipe and the boss; the boss is provided with external threads and is used for being connected with the internal thread interface.

Example 2

As shown in fig. 2, in embodiment 2, based on embodiment 1, the metal connecting member further includes a nut 1; the nut 1 with the boss that connects 2 one end is connected, nut 1 is equipped with the internal thread, nut 1 is used for in being connected with the external screw thread interface.

Embodiments 1 and 2 provide a male-female interface.

The conductive polytetrafluoroethylene inner tube has the functions of transmitting working media and is flexibly connected;

the stainless steel enhancement layer has the function of protecting the inner pipe, so that the fluoroplastic hose can bear expected working pressure;

the metal connecting piece has the functions of butt joint with an on-machine interface and connection of a steel wire reinforced hose;

the silicon rubber fireproof sleeve has the function of covering the outside of the steel wire reinforcing layer, and has fireproof and heat insulation effects;

the function of the anti-abrasion protective sleeve is to coat the outer part of the steel wire reinforcing layer or the outer part of the silicon rubber fireproof sleeve, thereby having the anti-abrasion function.

The inner tube is conductive and eliminates static electricity generated during liquid flowing

The engine compartment hose is coated with the silicon rubber fireproof sleeve, has good fireproof performance, and meets the harsh working environment requirement of an airplane.

The flexible pipeline consists of a conductive polytetrafluoroethylene inner pipe, a stainless steel wire reinforcing layer and a metal connecting piece, and a silicon rubber fireproof sleeve or an F46 anti-abrasion sheath is coated on the outer layer.

The inner pipe is made of polytetrafluoroethylene dispersion resin with a T62 brand, and the material has good thermal property, electrical property, chemical property and the like, such as chemical resistance, hydrochloric acid, hydrofluoric acid, fuming sulfuric acid, nitric acid, hot caustic soda solution and the like, so far, no solvent which can dissolve polytetrafluoroethylene at the temperature of below 300 ℃ and weather resistance are available, the solvent is not influenced by moisture, mildew, bacteria, ultraviolet rays and the like, and the material still has good weather resistance and the like no matter the material is exposed for ten years under any weather conditions. In addition, the lubricating agent has excellent lubricity and very low friction coefficient; the flame-retardant and flame-retardant composite material has excellent electrical insulation performance, excellent dielectric property, excellent thermal stability and incombustibility, has an oxygen limiting index L01 of over 95, can only be melted on flame, does not generate liquid drops, and is only carbonized finally. The T62 resin inner tube has the characteristics of good bending property and stress cracking resistance, and can effectively improve the reliability and the service life of the product.

The steel wire reinforcing layer adopts stainless steel wires with certain strength, and improves the bearing capacity of the pipe body in a winding and weaving or weaving mode to achieve the product pressure index.

The metal connecting piece connects the pipe body with peripheral equipment, and the pipe body, the joint and the sleeve are assembled through buckling to enable the product to achieve good sealing performance and anti-pulling performance. The connection between the nut and the peripheral equipment is mechanical seal connection, and the structural size and the thread of the nut are designed according to the interface of the peripheral equipment.