The metal hose

 

(57) Abstract:

The hose is designed for use in hydraulic and pneumatic systems high pressure. The corrugations of the shell hose is made variable pitch, which smoothly varies along the length of the shell. The minimum step is carried out at one-third length measured from the end of the shell. At the end of the shell step is made equal to three, and in the middle of the shell is twice the minimum step. The result is improved reliability and durability of the hose. 1 Il.

The invention relates to the field of engineering, namely, hoses, and can be used in hydraulic and pneumatic high pressure systems.

Known flexible hose (USSR Author's certificate N 343103, F 16 L 11/12, bull. N 20, 1972), consisting of a flexible camera, braid and end fittings.

The disadvantage of the flexible hose is the low reliability and durability of the hose due to the constant length of the flexible chamber stiffness, contributing to mounting stresses in the zone of the end fittings and in the middle of the flexible chamber, while ensuring the minimum allowable bend radius of the hose.

Also known metal hoses (OST 5P.5351-78 and THAT the second valve.

A disadvantage of the known hose is the low reliability and durability due to the constant length of the shirred casing rigidity, contributing to mounting stresses in the zone of the end fittings and in the middle of the shirred casing while ensuring the minimum allowable bend radius of the hose. Hoses fail, not after the stipulated OST 5P.5351-78 and THE 5.551-10138-82 warranty period. All hoses metal, broken, have a characteristic defects - cracks fatigue character in corrugated sheath, located generally in the area of the end fittings, and less in the middle of the hose.

The problem solved by the invention is to enhance reliability and durability of the metal hose.

The invention consists in that the metal hose comprising a corrugated shell, wire braid and end fittings, buckles made with variable pitch, which smoothly varies along the length of the shell, and the minimum step is carried out at one-third length measured from the end of the shell, at the end of the shell step is made equal to three, and in the middle of the shell is twice the minimum step.

The invention paasikoski consists of the shirred casing 1, wire braid 2 and end fittings consisting of a tip 3, the ring 4 and the sleeve 5. The corrugations are made with variable pitch, which smoothly varies along the length of the shell, and the minimum step is carried out at one-third length measured from the end of the shell, at the end of the shell step is made equal to three, and in the middle of the shell is twice the minimum step.

The metal hose is as follows.

Linear movement of machinery and equipment installed on shock absorbers, are compensated by the bending of the hose. When mounting the hose to the pipe with the required bend radius of voltage in corrugated sheath in the area of end fittings and in the middle of the shell will be much less stress at locations spaced from the end at a distance equal to one third of the length, i.e., where the step of corrugations least.

The proposed structure of the metal hose can improve its reliability and durability.

The metal hose comprising a corrugated shell, wire braid and the terminal fittings, wherein the corrugations are made with variable pitch, which smoothly varies along the length of the shell, and the minimum step vypolneniia shell - double the minimum step.

 

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