RU77263U1 - SOFT HIGH STRENGTH TOWEL OF A LOADING LIFT FOR AGGRESSIVE MEDIA - Google Patents

Abstract

The utility model relates to lifting and transport machinery, in particular, to soft high-strength towels for lifting devices, and can be used in various industries. A soft high-strength towel for a lifting device contains a carrier core, which is at least two closed plaits of synthetic thread, and a protective cover made of synthetic woven material placed around the carrier core. The bearing core inside the protective cover moves freely, and the volume of the bearing core is from 40% to 50% of the internal volume of the cover. Moreover, it is made of polypropylene fibers, and the stitching is made of polypropylene sewing threads. The technical result consists in increasing the reliability and safety, as well as the durability of the sling during operation in aggressive environments, with a high concentration of alkalis, acids and other aggressive substances. 4 ill.

Description

The utility model relates to lifting and transport machinery, in particular, to soft high-strength towels for lifting devices, and can be used in various industries.

It is known from the prior art that a soft high-strength towel for a lifting device comprises a carrier core, which is at least two closed plaits of synthetic thread, and a protective cover made of synthetic woven material placed around the supporting core, while the bearing core moves freely inside the protective cover, and the volume of the bearing core is from 40% to 50% of the internal volume of the cover.

The disadvantage of the prototype is less than the claimed soft high-strength towel reliability and durability when used in aggressive environments with a high concentration of alkalis and acids.

The objective of the utility model is to produce a soft high-strength towel for a lifting device that is reliable and safe in operation, as well as durable in operation in aggressive environments.

 The technical result consists in increasing the reliability and safety, as well as the durability of a soft high-strength towel for a lifting device when used in aggressive environments, with a high concentration of alkalis, acids and other aggressive substances.

The technical result is achieved by the fact that a soft high-strength towel for a lifting device contains a supporting core, which is at least two closed bundles of synthetic thread, and a protective cover made of synthetic woven material placed around the supporting core, the bearing core inside the protective cover moves freely, and the volume of the bearing core is from 40% to 50% of the internal volume of the cover, while it is made of polypropylene fibers, and the crosslinking is made of polypropylene new sewing threads.

The implementation of the sling of polypropylene fibers, and cross-linking of polypropylene sewing threads made it possible to increase reliability, safety and durability when used in aggressive environments, with a high concentration of alkalis and acids, since:

- polypropylene fibers and threads have lightness, strength, stability to abrupt changes in temperature, the ability not to absorb water, oil and other liquids, high dielectric properties (e 2,1-2,5 at a frequency of 1 · 10 ⁶ Hz), it is difficult to ignite, hydrophobic, neutral to acids, alkalis and other aggressive substances, insoluble in non-polar org. solvents (benzene, toluene, decalin, tetralin).

 Figure 1 shows a General view of a soft high-strength towel; figure 2 is a variant of a soft high-strength towel with a protective sleeve; figure 3 is a longitudinal section of a soft high-strength towel, figure 4 is a transverse section of a soft high-strength towel.

A soft, high-strength towel contains a carrier core made of synthetic filaments formed into a closed rope 1 and a protective cover 2 made of synthetic woven material placed around the carrier core. The carrier core further includes at least one closed loop of synthetic thread 3, located together with the first bundle 1 in the protective cover 2. The bearing core inside the protective cover moves freely, and its volume is from 40% to 50% of the internal volume cover. Mostly, the closed tourniquet is made in the form of a spiral, and the protective cover 2 is made round-woven or stitched. A label 4 is sewn into the protective cover 4. The length C of stitching the ends 5 of the protective cover into each other and the label is sewn is equal to two diameters of the cover, but not less than 300 mm. The softest high-strength towel is made of polypropylene fibers, and the stitches are made of polypropylene sewing threads. In one embodiment, a soft high-strength towel can be provided with a protective sleeve 6. The place where the ends of the thread are fixed with a special knot and glued with adhesive tape 7. Also, a soft high-strength towel can have a safety factor of 5.

Aggressive environments in which a soft high-strength towel can work under normal conditions:

acetone — CH ₃ —C — CH ₃ ;

nitric acid - HMO ₃ ;

benzene - C ₆ H ₆ ;

dimethylformamide - HCOM (CH ₃ ) ₂ ;

dioxane - HCON (CH ₃ ) ₂ ;

alkali 40% - NaOH (40%);

m - xylene - C ₆ H ₄ (CH ₃ ) ₂ ;

m - cresol - CH ₃ C ₆ H ₄ OH;

monochlorobenzene - C ₆ H ₅ CL;

formic acid - HCOOH;

methylene chloride - CH ₂ CL ₂ ;

sulfuric acid - H ₂ SO ₄ ;

hydrochloric acid - HCL;

toluene - C ₆ H ₅ CH ₃ ;

acetic acid (glacial) - CH ₃ COOH (glacial);

hydrofluoric acid - HF concentration up to 60 g / l;

phenol - C ₆ H ₅ OH;

phosphoric acid - NRA ₃ ;

chloroform — CHCl ₃ ;

cyclohexanone - C ₆ H ₁₀ O;

carbon tetrachloride - CCL ₄ ;

alcohols;

ethers;

inorganic salt solutions

Due to its material, which is neutral to acids, alkalis and other aggressive substances, the towel remains unharmed by direct exposure to alkalis and acids of high concentration.

Thus, the implementation of a soft high-strength towel made of polypropylene fibers, and cross-linking made of polypropylene sewing threads made it possible to increase reliability, safety and durability when used in aggressive environments, with a high concentration of alkalis, acids and other aggressive substances.

Claims (1)

A soft high-strength towel for a lifting device for aggressive media, containing a carrier core, which is at least two closed plaits of synthetic thread, and a protective cover made of synthetic woven material placed around the supporting core, while the bearing core inside the protective cover moves freely, and the volume of the carrier core is from 40 to 50% of the internal volume of the protective cover, characterized in that it is made of polypropylene fibers, and the crosslinking is made of floor propylene sewing threads.