Does the wire rope require regular inspection 5

The main varieties of wire ropes, 1Phosphated coated wire rope, China invention patent, the wear resistance, corrosion resistance and rust resistance of the steel wire after phosphating treatment are comprehensively improved, and the service life is 2-3 times that of the smooth wire rope (pay attention to the difference with the smooth wire rope), 2Galvanized steel wire rope, 3

Stainless steel wire rope, 4Plastic-coated wire rope, 5The smooth wire rope will be completely eliminated by the phosphate coated wire rope.

Manganese-phosphated coated wire rope is preferred in atmospheric environment, and hot-dip galvanized-phosphating double-coated wire rope is preferred in corrosive environment.

Please refer to the GB T29086-2012 wire rope safety use and maintenance national standards for maintenance, as well as in accordance with the GB T5972-2009 crane wire rope maintenance maintenance installation inspection scrap national standards for inspection and scrapping, the above standards can be free of charge online, for reference only.

Before the use of wire ropes, there are design requirements for inspection standard cycles in use.

The wire rope testing items mainly include twisting, wire diameter, rope warp, tensile strength, oiling, repeated bending test, torsion times, whole rope breakage, metal cross-sectional area loss, local damage, coating thickness and other items, it is worth mentioning that the wire rope friction liner is also best tested, the specific test items are density, hardness, tensile elastic modulus, elongation at break, compressive modulus, bending stress, bending strength, compressive strength, impact strength, tensile strength, wear, friction coefficient, wear rate, wear, and other items.

Anke High-tech Research Institute; Coal safety inspection and inspection.

Business; technical services; Q&A: Manager Yu 17739775199

Material and product testing.

Tensile properties, torsion test, bending performance, yield strength, tensile strength, elongation after breaking, total elongation under maximum force, impact, hardness, breaking test, antistatic, flame retardant of non-metallic materials, antistatic test, sintered brick, conveyor belt joint tensile test, hair dryer cloth, braided mesh, cable, conveyor belt, bolt chain link, wire rope ** flaw detection, compacted strand wire rope, mining wire rope, elevator wire rope, petroleum wire rope, conveyor belt wire rope, control wire rope, aviation wire rope, Ropeway wire rope, port machinery wire rope, steel wire, steel strand, steel cord, aluminum strand, aluminum clad wire, copper clad wire, bolts, nuts, metal bellows, plastic bellows, double-wall corrugated pipes, perforated corrugated pipes, flexible permeable pipes, plastic blind pipes, PVC pipes, shackles, slings, etc.

Non-destructive testing. Ultrasonic flaw detection, magnetic particle flaw detection, penetrant flaw detection, radiographic flaw detection, eddy current flaw detection, phased array imaging flaw detection.

Electrical test and meteorological lightning protection detection.

6kV-220kV insulation labor protection equipment inspection, high and low voltage electrical test, power grid harmonic, capacitance current, stray current test, lightning protection detection of various structures, UPS power supply charging and discharging test, photovoltaic power station testing, subway high-voltage equipment testing, etc.

Workplace sensor detection and inspection.

Combustible gas: hydrogen, carbon monoxide, methane, ethane, propane, butane, ethylene, propylene, butylene, acetylene, propylene, butylene, hydrogen sulfide, phosphine, pentane, pentene, benzene, coal gas, natural gas, oxygen, carbon dioxide, nitrogen, methanol, butanol, dimethyl ether, ether, acetic acid, acetone, propylene oxide, ethylene oxide, ethyl acetate, ethylbenzene, p-dioxane, isobutane, tetrahydrofuran, methoxyethanol, nitromethane, nitrobenzene, phenylsane, chlorobenzene, aniline, propanol, xylene, toluene, Dichloroethane, ethylene chloride, dichloropropane, acetaldehyde, acetylacetone, benzoic acid.

Toxic and harmful gases: chlorine, ammonia, nitrogen oxides, phosgene, hydrogen fluoride, sulfur dioxide, sulfur trioxide, dimethyl sulfate, nitrogen, methane, ethane, ethylene, carbon monoxide, nitrobenzene vapor, hydrogen cyanide, hydrogen sulfide, formaldehyde.

Legal analysis: 1) The inspection and safety factor of the wire rope must comply with the relevant provisions of Articles 399 to 402 of the Coal Mine Safety Regulations.

2) The inspection of broken wire rope must comply with the relevant provisions of Article 405 of the Coal Mine Safety Regulations.

3) The inspection of wire rope wear must comply with the relevant provisions of Article 406 of the Coal Mine Safety Regulations.

4) The main running wire rope shall use a wire rope with an oil-free surface, and its plugging length shall not be less than 1000 times the diameter of the wire rope.

5) The wire rope should be inspected at least once a day. The inspection items are mainly broken wires, abrasion, rust and deformation, etc., if it is found that there are broken strands, knots or serious corrosion, pitting and pitting grooves or loose outer steel wires, no matter how many broken wires or rope diameter becomes thinner, they must be replaced immediately.

6) The tensioned wire rope can be connected by rope clamp, but the clamping must be reliable.

7) The newly purchased wire rope must be tested to eliminate internal stress before leaving the factory to prevent the wire rope from rotating during operation.

Legal basis

Standardization Law of the People's Republic of China Article 2 The standards (including standard samples) mentioned in this Law refer to the technical requirements that need to be unified in the fields of agriculture, industry, service industry and social undertakings.

Standards include national standards, industry standards, local standards, group standards, and enterprise standards. National standards are divided into mandatory standards and recommended standards, and industry standards and local standards are recommended standards.

Mandatory standards must be enforced. The State encourages the adoption of recommended standards.

Legal analysis: This standard is equivalent to the international standard ISO2532-74 "Wire Rope - Vocabulary". In the wire rope, the strands of the wire and each layer are arranged in a way with the minimum torque or the minimum degree of rotation, for example, in the multi-layer, multi-strand wire rope formed by strands of the same structure and a single-ply strand wire rope twisted around an independent wire rope core, when the twisting direction of the wire and the strands of each layer is opposite, this wire rope has a low torsional stress, so as to show non-rotation or micro-rotation.

1. Phosphated coated wire rope (Chinese patent), the phosphated film of rope wire is 3-60 grams, and the steel wire is not cold-drawn before twisting after phosphating, and the strand rope, steel core and wire rope are directly twisted. 2. Galvanized steel wire rope, including hot-dip galvanizing and electro-galvanizing, the thicker the galvanized layer, the stronger the anti-corrosion ability. 3. Plastic-coated wire rope, coating the outer surface of the wire rope or the outer surface of the strand rope with a certain thickness of plastic, including polyethylene, polypropylene, polyurethane, etc.

4. Smooth wire rope, the rope-making wire obtained after heat treatment and surface preparation of raw materials cold drawing, the steel wire is no longer directly twisted into strand rope, steel core and wire rope after any surface treatment, foreign production began in 1834, and domestic Tianjin No. 1 Wire Rope Factory began production in 1939.

Legal basis: Civil Code of the People's Republic of China Article 511 Where the parties are not clear about the content of the agreement, and it is still uncertain in accordance with the provisions of the preceding article, the following provisions apply:

1) If the quality requirements are not clear, they shall be performed in accordance with the mandatory national standards; where there are no mandatory national standards, they shall be performed in accordance with the recommended national standards; If there is no recommended national standard, the dust rule shall be implemented in accordance with the industry standard; Where there are no national standards or industry standards, they shall be performed in accordance with the usual standards or specific standards that meet the purpose of the contract.

2) If the price or remuneration is not clear, it shall be performed in accordance with the market ** of the place of performance at the time of conclusion of the contract; If the ** pricing or ** guide price shall be implemented in accordance with the law, it shall be performed in accordance with the provisions.

3) Where the place of performance is not clear, and the currency is paid, the place where the receiving currency is located; If the immovable property is delivered, it shall be performed at the location where the immovable property is located; Other subject matter shall be performed at the location of the party performing the obligation.

4) If the time limit for performance is not clear, the debtor may perform at any time, and the creditor may also request performance at any time, but the other party shall be given the necessary time to prepare.

5) If the method of performance is not clear, it shall be performed in a manner conducive to the realization of the purpose of the contract.

6) Where the burden of performance costs is not clear, the party performing the obligation shall bear the burden; The creditor shall bear the performance costs increased due to the creditor's reasons.

It's not clear what specific type of wire rope you're using, but there is a general standard that you should be able to refer to:

GB T 20118-2017 General Technical Conditions for Wire Ropes.

Lifting wire ropes are consumables, which are accompanied by different degrees of wear and tear with the number of daily uses and the quality of each lifting goods. Therefore, developing the habit of careful inspection can minimize the breakage of the wire rope. Very important.

The inspection of wire rope is divided into self-inspection and periodic inspection.

Self-inspection: Workers conduct a self-inspection of the wire rope they use once a day before and after using the wire rope to lift the goods. The inspection items are as follows.

Whether the rope body is broken or not.

Condition of wear and tear.

Corroded condition.

End treatment of the rope eye.

Regular inspection: The company's safety department will generally do a regular inspection of the wire rope once a month, and after the inspection, it will be attached to the end of the rope eye with a colored label and reveal the color allowed to be used in the inspection this month. For example, in September it is a red label and in October it is a green label.

The inspection items are as follows.

1.The broken wire between a twist of the wire rope is more than 10%.

2.The diameter reduction exceeds the production regulation by more than 7%.

3.Kinked wire rope.

4.Significantly deformed or corroded wire ropes.

The steel wire popped out. The heart line is exposed.

The rope strands droop. Steel strands pop out.

Partially flattened. Kink spiral cage.

The lifting wire rope must be inspected once a day, and the balance wire rope must be inspected at least once a week. The section that is easily damaged and broken or corroded should be stopped for detailed inspection. The protrusion of the broken wire should be cut at the time of inspection.

The wire rope inspection standards are:

The ratio of the cross-sectional area of the steel wire to the total area of the steel wire shall not be used for lifting personnel, and shall not be used for lifting materials. When the ratio of the cross-sectional area of unqualified steel wire and the total area of steel rope reaches 25%, this wire rope must be replaced.

All kinds of stranded wire ropes must be replaced when the ratio of the wire section area and the total area of the wire within a twist distance reaches the following values, and the wire rope used for lifting personnel or lifting personnel and materials is 5%. The wire rope for lifting materials, the balance wire rope, the brake wire rope for the fall preventer, the wire rope that doubles as a wire rope for transporting people, and the wire rope for the traction belt conveyor are 25%.

The wire rope for lifting materials, the balance wire rope, the brake wire rope of the fall arrester and the wire rope that doubles as a wire rope for transporting people, and the wire rope for the traction belt conveyor are 25% The diameter reduction calculated by the nominal diameter of the wire rope must reach the following values.

The wire rope needs to bear the effect of alternating load during use, and its performance is mainly determined by the mechanical properties of the wire, the surface state of the wire and the structure of the wire rope. The steel wire material includes carbon steel or alloy steel, which is made by cold drawing or cold rolling, and the steel wire cross-section is round or special-shaped (T-type, S-type, Z-type), and the special-shaped cross-sectional steel wire is mainly used for sealing the production of steel wire rope, which has high tensile strength and toughness, and the steel wire is treated with suitable surface treatment to meet the needs of different environmental conditions.