Explosion Proof Crane

Our explosion proof cranes are designed to operate seamlessly in hazardous environments where flammable gases, vapors or dusts are present. They combine advanced safety features, durability and superior performance to meet the stringent requirements of industries such as oil and gas, chemical, mining and pharmaceuticals.

All electrical components, motors and controllers are certified explosion proof (ATEX/IECEx compliant). This ensures the cranes remain safe even in the most volatile conditions. Available as bridge cranes, gantry cranes or jib cranes, tailored to your specific operational needs and workspace requirements.

Ourexplosion proof cranes are capable of handling heavy loads with precision, ensuring efficient material handling in hazardous areas.

Corrosion Resistant Construction: Designed with robust materials and coatings to withstand corrosive and extreme environments. This crane is equipped with overload protection, anti-collision system and fireproof enclosure for safe and reliable operation. Modular design and user-friendly components reduce downtime and simplify repairs.

Place of Origin ：Henan, China

Warranty： Main Body 12months

After-sales Service Provided： Field installation, commissioning and training

Working duty：A3-A5

Operation mode： Ground control or cabin control,Wireless Remote

Painting color ：On request

Electric protection：IP54,IP55

Lifting/traveling speed： Single/double speed or on request

Ambient temperature： -25~100 Celsius,on request

Working voltage： 3 Phase 380V 50Hz, or on request

Material： Q235/Q345 steel plate,onrequest

Main electrical parts： Schneider brand, Chint brand or on request

Power supply mode： Slide wire or soft cable

Warranty： Main Body 12months

Certification： CE ISO SGS GOST

1.Main beam

The main beam of an explosion proof crane is a critical structural component that supports the load and ensures safe operation in hazardous environments. These environments typically contain explosive gases, vapors, or dust, such as those found in chemical plants, oil refineries, and mining industries.

The main beam is usually made of high-strength steel, capable of handling heavy loads while maintaining durability and safety.It can be a box girder or an I-beam, depending on the crane's design, capacity, and span requirements.

The beam is often reinforced with ribs or plates to ensure structural integrity under dynamic and static loads.The beam is coated with anti-corrosive and anti-static finishes to reduce the risk of ignition in hazardous environments.Any equipment mounted on the main beam, such as motors or sensors, is enclosed in explosion-proof casings to isolate potential sources of ignition.

Lifting System

An explosion proof crane lifting system is designed to operate safely in environments where explosive gases, vapors, or dust are present. These systems ensure the crane does not act as a source of ignition, adhering to strict safety standards such as ATEX, IECEx, or NEC/CEC for hazardous locations.

Explosion-Proof Hoist:The hoist is the core lifting mechanism and is specially enclosed to prevent sparks or heat from escaping into the environment.Typically electric or pneumatic, with motors and brakes designed for hazardous areas.

Lifting Motor:Explosion-proof electric motors (Ex d) are used, enclosed to prevent ignition of surrounding gases.Equipped with temperature monitoring to prevent overheating.

Gear Mechanism:Durable, precision-machined gears are enclosed in a flameproof housing to ensure no sparks or friction-induced heat is exposed.

Wire Rope or Chain:High-strength steel wire ropes or chains for lifting loads.Designed with anti-corrosion properties for use in harsh environments.

Hook Assembly:The hook is made of forged steel or alloy to withstand heavy loads.Anti-spark hooks may also be used, coated with non-sparking materials like bronze or aluminum.

3.End carriage

The end carriage of an explosion proof crane refers to the structural and functional part of the crane that supports and guides its movement along the runway or rails. End carriages are equipped with wheels, motors, and gearboxes, enabling the crane to travel safely and smoothly in hazardous environments. These environments include areas with explosive gases, vapors, or dust, such as chemical plants, oil refineries, or mining facilities.

Motors, electrical components, and enclosures are certified to prevent sparks or excessive heat that could ignite an explosive atmosphere (e.g., ATEX, IECEx compliance).Made from high-strength steel to withstand heavy loads and harsh operating conditions.

4.Crane travelling mechanism

1) Working principle

The crane is powered by an explosion-proof motor that is sealed to prevent sparks, heat, or electrical discharge from igniting the surrounding atmosphere.The motor drives the wheels of the crane's travelling mechanism via a gearbox and coupling.A heavy-duty gearbox ensures smooth power transmission to the wheels or track system.The gearing is designed to operate efficiently under load while maintaining minimal friction, reducing the risk of overheating.The crane's travelling mechanism consists of drive wheels and idler wheels that run on fixed rails.These wheels are typically made of hardened steel and are designed to ensure stability and durability, even under heavy loads.

2) Functions of the crane operating mechanism

Horizontal Movement：The mechanism allows the crane to move horizontally along the runway beams, ensuring it can reach various locations within the operating area. This is essential for transporting materials to different points in the facility.

Load Transportation：It enables the crane to carry and move heavy loads safely and accurately across a worksite, ensuring proper load distribution without causing mechanical stress.

Explosion Protection：Explosion-proof traveling mechanisms are specially designed to operate safely in hazardous environments (such as chemical plants, oil refineries, and mines) where flammable gases, vapors, or dust may be present.

Precision Positioning：The traveling mechanism ensures precise positioning of the crane, enabling accurate placement of loads during handling or assembly processes.

Smooth Acceleration and Deceleration：The mechanism includes controls for smooth starting, stopping, and speed variation to avoid sudden movements that could endanger the load or the surroundings.

5.Trolley travelling mechanism

1) Working principle

The trolley traveling mechanism starts with an explosion-proof electric motor, which is designed with sealed enclosures to prevent sparks or heat from escaping and igniting hazardous gases or dust in the surrounding environment.The motor drives a gearbox, which reduces the motor's speed and provides the necessary torque to the drive wheels.The drive wheels, powered by the gearbox, roll along the rails installed on the crane bridge. Friction between the wheels and the rails ensures smooth and controlled movement.The crane operator uses an explosion-proof control panel to control the motor, enabling forward and reverse movements. Variable speed controls allow for precise positioning of the trolley.

2) Function of the trolley operating mechanism

Trolley Movement: The primary function of the trolley traveling mechanism is to facilitate the horizontal movement of the trolley along the length of the crane bridge. This allows the load to be positioned accurately over the desired area for lifting or moving.

Explosion-Proof Design: The trolley traveling mechanism in explosion-proof cranes is designed to prevent the ignition of flammable gases, vapors, or dust. Components such as motors, wiring, and electrical systems are built to conform to specific safety standards (such as ATEX or IECEx) to avoid sparking or other hazards in explosive environments.

Smooth Operation: The trolley mechanism ensures smooth and precise movement of the trolley, allowing for accurate positioning of loads without jerking or sudden stops. This is essential for maintaining control over heavy or delicate materials in hazardous environments.

Load Carrying: It supports and carries the load in conjunction with the hoisting mechanism, ensuring that the load is transferred safely across the crane's span.

Control and Safety: Explosion-proof cranes are often equipped with specialized controls to monitor and regulate the movement of the trolley. This includes emergency stop functions, overload protection, and fail-safe systems to maintain safety during operation.

Durability and Reliability: Given the potentially harsh environments (e.g., chemical plants, oil rigs, mining sites), the trolley traveling mechanism is built to endure exposure to corrosive elements, extreme temperatures, and other challenges, ensuring long-term, reliable operation.

6.Crane wheel

An explosion proof crane is designed for use in hazardous environments where the risk of explosion exists, such as in industries dealing with flammable gases, vapors, or dust. The crane wheel in an explosion-proof crane is typically engineered to be durable and able to operate safely under such extreme conditions.

The wheel is usually made of heavy-duty, explosion-proof materials such as steel or alloy metals that can withstand impacts, extreme temperatures, and corrosive environments.

The wheel design minimizes the risk of sparks or heat generation, often through features like smooth surfaces or special coatings.

Explosion proof crane wheels often include specialized seals to prevent the ingress of dust, moisture, or other hazardous substances that could compromise the wheel's performance.

These wheels are built to support the heavy loads typical of cranes, ensuring they maintain functionality even in volatile environments.

The wheels meet specific safety standards such as ATEX or IECEx, which classify equipment based on its suitability for use in explosive atmospheres.

7.Crane Hook

A crane hook designed for explosion-proof cranes is specifically engineered to prevent sparks or heat from igniting any explosive atmosphere around the crane. These hooks are typically used in industries such as oil and gas, chemical, or mining, where hazardous materials or explosive gases might be present.

Material: Made from non-sparking and corrosion-resistant materials like stainless steel or specially treated alloys to avoid any potential sources of ignition.

Design: The hook design minimizes sharp edges or points that might create friction or heat capable of causing sparks.

Certification: Explosion-proof crane hooks typically meet international safety standards, such as ATEX (for Europe) or UL (for North America), ensuring they can operate safely in hazardous environments.

Sealing and Enclosures: Some hooks may have sealed electrical components to prevent any arcing or sparking in explosive atmospheres.

Load Capacity: The explosion-proof design does not typically compromise the hook's load-bearing capacity, ensuring it can handle heavy lifting in industrial settings.

8.Motor

Explosion-proof cranes are specially designed to operate in environments where flammable gases, vapors, or dust may be present, such as chemical plants, oil refineries, and mining operations. The motor used in explosion-proof cranes is a critical component that needs to meet specific safety standards to ensure safe operation in these hazardous conditions.

The motor is housed in an enclosure that prevents any sparks or heat generated inside the motor from igniting the external hazardous environment.These enclosures are typically made of robust materials such as cast iron or steel.

Motors for explosion-proof cranes are usually certified by international standards such as ATEX (Europe), IECEx (International), or UL (United States), which indicate the motor is safe for use in explosive atmospheres.

Explosion-proof motors are sealed to prevent the entry of dust, moisture, and other contaminants that could compromise the safety or function of the motor.

The motor design includes heat dissipation mechanisms to ensure the motor does not overheat and pose a fire risk. This may include fan cooling, heat sinks, or special temperature sensors.

The wiring of the motor is also explosion-proof, often using specially designed cables and connectors to prevent sparking or overheating.

9.Sound and light alarm system & limit switch

1) Sound and light alarm system

An explosion-proof crane is designed to operate safely in hazardous environments where there is a risk of explosion due to flammable gases, vapors, or dust. A sound and light alarm system is an essential safety feature for such cranes, providing audible and visual alerts to warn operators and personnel of potential dangers.

Sound Alarm (Horns or Sirens):The sound alarm is typically a loud horn or siren that produces a high-pitched, attention-grabbing noise.It is designed to be heard over the normal operating noise of the crane and the surrounding environment.The sound alarm is often triggered by abnormal conditions, such as an emergency stop, overload, system failure, or detection of hazardous gases.

Light Alarm (Flashing Beacons or Lights):The light alarm usually includes flashing lights or rotating beacons that are highly visible, even in bright conditions.The lights are often color-coded to indicate different types of alerts. For example:

Red: Critical or emergency alert (e.g., malfunction, overload, or imminent danger).

Yellow: Warning or cautionary alert (e.g., approaching the weight limit, maintenance required).

Green: Normal operation or status OK.

2) Limit switch

A limit switch on an explosion-proof crane is a critical safety component that helps ensure the crane operates within its designated limits, preventing it from exceeding certain mechanical thresholds, which could be dangerous, especially in hazardous environments.

Purpose:

Safety: It ensures that the crane doesn't move beyond its designated range, preventing collisions or damage to the equipment.

Explosion-proof design: Since the crane operates in potentially hazardous areas (where explosive gases, dust, or vapors may be present), the limit switch must be designed to avoid sparking or creating any electrical hazards.

Position Monitoring: The switch monitors the position of the crane's moving parts (e.g., hoist, trolley, or bridge) and sends a signal to stop or reverse motion when it reaches the predefined limit.

Features:

Explosion-proof housing: The switch and its components are housed in a robust, sealed casing to prevent ignition of gases or dust.

Mechanical or electronic: Limit switches can be mechanical (with physical contacts) or electronic (with sensors like inductive or capacitive sensors).

Adjustability: The limit switch can often be adjusted to change the maximum travel distance of the crane's moving parts.

Reliability: Given the hazardous environment, the limit switch should be highly durable, corrosion-resistant, and capable of withstanding extreme conditions.

10.Safety Devices

Explosion-Proof Motors: These motors are designed to operate without igniting the surrounding atmosphere. They are sealed and protected to prevent sparks or overheating, which could lead to an explosion.

Overload Protection: Explosion-proof cranes are equipped with overload protection devices to prevent the crane from lifting loads beyond its rated capacity. This helps to avoid stress on the structure and machinery, which could lead to failure and accidents.

Limit Switches: These are used to prevent the crane from moving beyond its safe operating limits. They are particularly important in hazardous environments to prevent mechanical damage and avoid unsafe conditions.

Grounding and Bonding: Explosion-proof cranes are properly grounded and bonded to prevent the buildup of static electricity, which could create sparks and lead to an explosion.

Explosion-Proof Lighting: Specialized lighting that is designed to prevent sparks from igniting any flammable gases or dust in the area. The lights are sealed to prevent hazardous materials from coming into contact with electrical components.

Thermal Protection: Thermal protection devices are used to monitor and control the temperature of critical components, ensuring that they don't overheat and create a risk of ignition.

Flameproof Enclosures: Critical electrical components and control panels are housed in flameproof enclosures. These enclosures are designed to withstand internal explosions and prevent the spread of flames to the surrounding environment.

Cable and Wiring Protection: Explosion-proof cranes have special cables and wiring systems that are resistant to corrosion and physical damage. The wiring is often armored and installed in ways that reduce the risk of sparks.

Explosion Suppression Systems: Some advanced explosion-proof cranes feature systems that can detect and suppress an explosion before it spreads. These systems use sensors and extinguishing agents to neutralize potential threats.

Emergency Stop System: An emergency stop button or system allows operators to immediately shut down the crane in case of a malfunction or hazardous situation. This can prevent further damage and minimize the risk of explosions.

11.Control Mode

Pendant Control:A handheld control device is used to operate the crane remotely. It typically features explosion-proof enclosures and is connected to the crane via cables.The pendant control can manage functions like lifting, lowering, and horizontal movement of the crane.

Radio Remote Control:This mode allows for wireless control of the crane using explosion-proof radio transmitters and receivers. It offers greater flexibility and safety, as the operator can work from a safe distance away from hazardous zones.

Cabin Control:The crane's cabin is designed with explosion-proof materials, and the operator controls the crane's functions from within the cabin. This is suitable for larger cranes or those that require more complex maneuvers.Typically, the cabin will include controls for lifting, lowering, hoisting, and traveling.

Manual Control with Safety Features:In certain situations, manual control might be used, but it will be combined with safety features like emergency stop buttons, overload protection, and explosion-proof electrical systems to ensure safety in hazardous environments.

Automated Control Systems:Some explosion-proof cranes use programmable logic controllers (PLCs) and sensors to automate lifting and movement. These systems are often used in environments requiring consistent operations, such as in chemical plants or refineries.

12.Sketch

Main technical

Advantages

Safety in Hazardous Environments: Explosion-proof cranes are essential in industries like oil and gas, chemicals, mining, and pharmaceuticals, where flammable materials are present. These cranes are built to prevent sparks, heat, or any other source of ignition that could cause an explosion.

Compliance with Safety Regulations: Explosion-proof cranes are designed to meet international safety standards and regulations (such as ATEX or IECEx), ensuring that businesses comply with safety laws and industry standards.

Durability and Reliability: These cranes are built to withstand harsh and dangerous working conditions, providing reliable operation in potentially explosive atmospheres, reducing the likelihood of accidents and downtime.

Enhanced Worker Protection: By using explosion-proof cranes, workers are protected from the risks associated with hazardous working conditions, helping to create a safer work environment.

Prevention of Property Damage: Explosion-proof cranes can help mitigate the risk of catastrophic damage to both the crane and surrounding infrastructure in the event of an explosion, which could be costly to repair or replace.

Minimizing Operational Downtime: With explosion-proof cranes in place, businesses can continue operations even in potentially dangerous environments, minimizing downtime caused by safety concerns or accidents.

Increased Productivity: Because explosion-proof cranes allow operations to continue safely, they contribute to higher productivity levels without the risk of interruption from explosions or fires.

Long-Term Cost Savings: Although the initial cost of explosion-proof cranes may be higher, they can lead to significant long-term savings by reducing accident-related costs, downtime, and the need for repairs or replacement of equipment.

Application:

Chemical and Petrochemical Industry:These cranes are essential in environments where volatile chemicals or gases like natural gas, gasoline, and propane are stored or processed.They are used for lifting and moving equipment, materials, and chemicals in such environments.

Oil and Gas Industry:Explosion-proof cranes are widely used in offshore oil rigs and drilling platforms where there is a high risk of gas leaks or oil explosions.They are used to move heavy drilling equipment, pipes, and other materials.

Mining Industry:Cranes in mining operations, especially in underground mines, are often required to be explosion-proof due to the presence of combustible gases and dust.

Pharmaceutical and Food Processing:In facilities that deal with explosive powders or gases, such as pharmaceutical plants or food production plants, explosion-proof cranes ensure safe operation while handling materials and equipment.

Hazardous Waste Management:In environments dealing with hazardous waste that could emit explosive gases, explosion-proof cranes are used to safely manage and transport waste materials.

Aerospace and Military:These cranes are used in areas where explosive materials or munitions are being stored, assembled, or tested.

Crane production procedure

1. Design and Engineering

Risk Assessment: Conduct a thorough risk assessment to identify the potential hazards in the environment where the crane will be used.

Explosion-Proof Standard Compliance: Ensure the crane is designed according to international standards (e.g., IECEx, ATEX) for explosion-proof equipment.

Materials Selection: Choose materials that are resistant to corrosion and suitable for explosion-proof enclosures, including non-sparking components.

2. Preparation of Components

Frame Construction: The crane frame should be built using high-strength steel or another suitable material. This frame should be designed to withstand mechanical loads and potential explosions.

Explosion-Proof Electrical Systems: Design electrical systems, including motors, controllers, and wiring, to be explosion-proof. This typically involves using flameproof enclosures and components rated for hazardous locations.

Load Handling Systems: Prepare the hoist, trolley, and other load handling systems to meet specific load requirements while adhering to explosion-proof standards.

3. Manufacturing and Assembly

Welding and Fabrication: The crane components (e.g., girder, support frame) are welded and fabricated to precise dimensions. All welding work should avoid creating sparks, and parts are often pre-coated or treated to enhance their corrosion resistance.

Electrical Component Assembly: Install the explosion-proof electrical components, including the motors, control panels, wiring, and enclosures. All electrical installations must be carefully sealed to prevent any ignition from sparks or arcs.

Explosion-Proof Coatings and Seals: Apply special explosion-proof coatings to exposed parts of the crane, and ensure all joints, seals, and electrical enclosures are properly secured.

4. Testing and Inspection

Inspection of Components: Conduct detailed inspections of individual components to ensure compliance with explosion-proof standards.

Electrical Safety Tests: Perform electrical tests, such as insulation resistance testing, earth bonding checks, and functional tests of the electrical system.

Explosion Proofness Testing: Some manufacturers perform actual explosion testing on components to verify the crane's ability to contain an explosion if one occurs.

Load Testing: Test the crane with its maximum load capacity to ensure stability, smooth operation, and safety under stress.

Final Inspection: A final, comprehensive inspection ensures that all parts of the crane are assembled correctly and safely.

5. Certification

Compliance Certification: Obtain certification for the crane's explosion-proof properties, confirming that it meets the relevant safety standards.

Documentation: Prepare the necessary technical documentation, including certificates of conformity, user manuals, and maintenance guides for clients.

6. Delivery and Installation

Transport and Shipping: Ensure the crane is safely transported to the installation site, adhering to all safety regulations during transport.

On-Site Installation: Install the crane at the site, ensuring that the environment is prepared for safe operation. This may involve installation of proper grounding, electrical connections, and environmental safety measures.

7. Ongoing Maintenance and Support

Routine Inspections: Perform regular maintenance and safety inspections, ensuring that the explosion-proof features remain functional.

Training: Provide training for operators and maintenance personnel to ensure safe use and proper maintenance of the explosion-proof crane.

Workshop view:

The company has installed an intelligent equipment management platform, and has installed 310 sets (sets) of handling and welding robots. After the completion of the plan, there will be more than 500 sets (sets), and the equipment networking rate will reach 95%. 32 welding lines have been put into use, 50 are planned to be installed, and the automation rate of the entire product line has reached 85%.

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