Explosion-proof rope hoist mainly by: lift hoist ， reducer, drum, drum shell, wire rope, hook block, electric control system, running the car, safety devices and other components. Explosion-proof rope hoist performance in line with GB3836.1-2000 "for explosive gas atmospheres explosion-proof electrical equipment chain hoists" - General requirements and GB3836.2-2000 "for explosive gas atmospheres chain hoists, explosion-proof electrical equipment" - flameproof "d" provisions. Explosion levels "d Ⅱ BT4".
Electric chain hoist products for factory flammable gas, steam and air to form an explosive mixture of gases, combustible dust and other places lifting heavy objects.
Explosion-proof rope hoist models, performance parameters, dimensions, etc. Please refer to the drawings and samples of performance parameters.
An rope hoist lifting motor
Motor operating system to meet the S4, agencies working-level design specifications conform GB/T3811 (M3 ~ M6), general protection class IP54, special requirements may also meet IP55, IP65 (dust proof). Insulation class F. In the motor terminal voltage deviation to ± 10% of nominal voltage, the rope hoist rated load condition, the normal starting and braking. Manufacturing conditions are met JB/T9008.1-2004 standards.
Ambient temperature of -20 ℃ ~ +40 ℃, atmospheric pressure is 0.08 ~ 0.11Mpa, relative humidity 85% (25 ℃), power supply rated voltage is 380V, rated frequency of 50Hz; rated operating cycle of 10min, benchmark continuous electrical connection rate of 25% per hour, equivalent to no more than 120 times the number of starts.
rope hoist gear is the heart. Its main features are:
1, the main material: Carton box cover is HT200 castings; 04 ~ 08 toothed shaft 20CrMnTi; 09 gears of 40Cr.
2, the process characteristics:
2.1 Case cover shaft hole, plane, coupling hole machining centers used in all automated processing, accurate positioning, high precision, reducing operational impatient tone and prevent leakage plays a key role.
2.2 gear shaft
Blanks: All forging process, effectively changing the material internal organizational structure, improve the impact resistance of parts, abrasion resistance and overload capability.
Tooth axis machining: insert, shaving, quilting, handle pull hoist equipment, high precision machining.
Heat treatment: The company has a normalizing, quenching and tempering, carburizing, local Induction Hardening, salt quench furnace, standard straight, blue, nitrogen and other more advanced technology means. Tooth surface hardness up to speed shaft 62HRC, hardened state requirements, the tooth surface accuracy 8-8-7 grade.
Third, reel, reel housings,
Wire rope and hook group
Roll: To improve the life of the drum, reducing the user's cost. Because in the long-term use, the rope constant friction, mainly damaged parts of wire rope and rope guide device. Lead rope and wire rope replacement device only 1-2 people an hour can be. And if you have to replace the drum hoist floor will collapse, replacement and then lifting up, spending high cost of materials, time, and more, and to use the lifting tool.
Roll Shell: normal working environment temperature conditions (-20 ~ +40 ℃) when the material is Q235A, when the ambient temperature (-40 ~ -20 ℃) when the material is 16Mn or Q345.
Rope: Safety factor greater than four times; preferred line contact wire rope, its structure in line with GB/T8918 rope and rope 6 18 * 7 * 37, the nominal tensile strength of not less than 1570MPa.
Hook group: Meet lifting hooks GB/T1005.1 ~ 5-98 standards. M, P grade material DG20, S-grade material DG34CrM, T grade material DG34CrNiM, V grade material DG34CrNi2M, the safety factor is greater than 5 times the nominal weight, forgings forging ratio 1: ≥ 1.5; machined, d4, r10, r11 parts of the surface roughness of 3.2; trapezoidal threaded portion of the surface roughness of 6.3 Yuan, and the remaining 12.5 machined surface roughness; hook smooth surface without cracks, folds, burnt and other defects; no internal cracks. White spots and other inclusions affect the use of security and other defects. Adhere to the batch in the manufacturing process, materials, chemical analysis, periodic impact tests. Prevent the rope hook with anti-decoupling device decoupling. Ensure that the hook in the course of the safety and reliability. In addition, using the hook as an important component of safety, the use of hook should always check the opening degree and other surface defects, such as cracks, wear, 5%, and corrosion.
Fourth, run institutions
Run institutions by the run motor, reducer, siding, wheels (including shaft) components. Teeth in the gear box shaft seal, to adapt the proof and dust-proof environments.
Motor: BZDY series run the motor for the plane part of its braking braking, the braking torque is small, the braking process more slowly, avoiding heavy lifting when you stop shaking.
Reducer: basically the same in this gear, pinion surface hardness up to 62HRC, hardened state requirements, the tooth surface accuracy 8-8-7 grade.
Wheels: G45 forging wheels.
Siding: Material is Q235AQ235B
Running speed is generally 18 ~ 19m/min, other speed requirements should be specified in the contract, double speed with 10:1; 4:1; 3:1; 2 :: 1.