The core difference between explosion-proof manual hoist and ordinary manual hoist

1、 Design philosophy: tailor-made for hazardous environments

Explosion proof design system

Friction control: The gears of the explosion-proof manual hoist are made of copper alloy (aluminum bronze/beryllium bronze), which reduces the friction coefficient by 60% compared to steel gears. At the same time, after high-temperature heat treatment, the surface hardness reaches HRC35 °, and the wear resistance is increased by 4 times.

Structural sealing: Key components (such as gearboxes) adopt a labyrinth sealing structure to prevent internal sparks from leaking out.

Chain optimization: The lifting chain is galvanized with a surface resistance of ≤ 1M Ω to prevent static electricity accumulation.

Security redundancy design

Dual braking system: equipped with mechanical braking and ratchet self-locking dual protection to ensure that the load does not fall in emergency situations.

Overload protection: Integrated torque limiter, automatically slips when overloaded, avoiding equipment damage.

2、 Material Revolution: Eliminating Risks from the 'Source'

Analysis of Differences between Explosion proof Manual Gourds and Ordinary Manual Gourds

Gear aluminum bronze (containing 92% copper) 45 # steel reduces the risk of friction sparks by 85%

The shell is made of H62 brass (thickness ≥ 3mm) and Q235 carbon steel (thickness 1.5mm), which increases the blast resistance strength by three times

Chain galvanized alloy steel (galvanized layer ≥ 8 μ m) ordinary alloy steel has a corrosion resistance life extended by 5 times

Fastener 316L stainless steel (containing 12% nickel) galvanized carbon steel reduces hydrogen embrittlement risk by 90%

3、 Application scenario: From "forbidden zone" to "global"

Explosion proof scenario

Petrochemical Industry: Lifting Drilling Tools on Oil and Gas Field Drilling Platforms (Case: Shengli Oilfield, reducing 12 fire risk incidents annually)

Underground coal mine: transportation gas detector (case: a coal mine in Shanxi province, equipment failure rate decreased by 80%)

Military storage: ammunition storage for hoisting shells (case: a military district's arsenal, with a 60% increase in operational efficiency)

Ordinary scene

An environment where explosion-proof measures are not required for warehouse cargo loading and unloading, workshop equipment maintenance, etc.

4、 Security Economics: The 'Balance' of Hidden Costs

Initial Investment

Explosion proof manual hoists are priced 50% -80% higher than regular models, but have a 40% lower lifecycle cost (including accident losses).

Case: After using explosion-proof hoists in a chemical plant, the annual insurance premium decreased by 180000 yuan (due to a decrease in risk rating).

Compliance costs

Explosion proof hoists require ATEX/IECEx certification, with a testing fee of approximately 50000 yuan per model.

Ordinary hoists only need to comply with the GB/T 3811-2008 Crane Design Specification, and the certification cost is less than 10000 yuan.

Maintain differences

Explosion proof hoists need to undergo explosion-proof surface testing every 6 months (at a cost of approximately 1200 yuan/time), while ordinary hoists do not require this project.

5、 Future Trends: The 'New Frontier' of Technological Convergence

Intelligence: Equipped with IoT sensors to achieve real-time monitoring of load and temperature (experimental phase).

Material Innovation: The explosion-proof surface of carbon fiber composite material (50% lighter than steel and three times stronger) has entered the testing stage.

Hydrogen Energy: Experimental hydrogen fuel cell explosion-proof hoist has been launched, with a range of over 80 hours.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment