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ZHONGTIAN HEAVY INDUSTRY

Quality makes the brand, integrity makes the future

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COURAGE TO INNOVATE
COURAGE TO INNOVATE

What we pursue is innovation and continuous effort

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BRAND DEVELOPMENT
BRAND DEVELOPMENT

Specializing in the production, manufacturing, and sales of cranes

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CUSTOMER SUCCESS
CUSTOMER SUCCESS

Always keep the customer in mind, always provide them with a better experience, and always create value for them

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Zhongtian Heavy

ABOUT US

Henan Zhongtian Heavy Industry Hoisting Machinery Co., Ltd., hereinafter referred to as the company. The company is mainly engaged in the manufacturing and sales of road and bridge engineering portal cranes, bridge erectors, bridge cranes, new cranes, various electric hoists and crane accessories; the company has advanced production equipment and strong technical force. Products are widely used in ports, docks, machinery, metallurgy, mining, electric power, railways, water conservancy, automobiles, papermaking, chemical industries and other industries.

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2019

Establish in

20 +

Product category

1000 +

Customer service

Technology

COURAGE TO INNOVATE

Mainly engaged in road and bridge engineering door machine, bridge machine, bridge crane, new crane, electric hoist and crane accessories manufacturing and sales

application
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The product is widely used in industries such as ports, docks, machinery, metallurgy, mining, electricity, railways, water conservancy, automobiles, papermaking, and chemical engineering.
  • Port
    Port
    The product is widely used in industries such as ports, docks, machinery, metallurgy, mining, electricity, railways, water conservancy, automobiles, papermaking, and chemical engineering.
  • Machinery
    Machinery
    The product is widely used in industries such as ports, docks, machinery, metallurgy, mining, electricity, railways, water conservancy, automobiles, papermaking, and chemical engineering.
  • Metallurgy
    Metallurgy
    The product is widely used in industries such as ports, docks, machinery, metallurgy, mining, electricity, railways, water conservancy, automobiles, papermaking, and chemical engineering.
  • Mine
    Mine
    The product is widely used in industries such as ports, docks, machinery, metallurgy, mining, electricity, railways, water conservancy, automobiles, papermaking, and chemical engineering.
  • Power
    Power
    The product is widely used in industries such as ports, docks, machinery, metallurgy, mining, electricity, railways, water conservancy, automobiles, papermaking, and chemical engineering.

    • GROUP NEWS

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    2025

    01-18

    What are the classifications of cantilever cranes?

    The cantilever crane can be divided into: 1. Fixed column cantilever crane 2. Curved arm cantilever crane 3. Wall-mounted cantilever crane 4. Gantry cantilever crane 5. Mobile cantilever crane 6. Double-arm cantilever crane 7. Wall-traveling cantilever crane

    2025

    01-18

    What are the classifications of cantilever cranes?

    The cantilever crane can be divided into: 1. Fixed column cantilever crane 2. Curved arm cantilever crane 3. Wall-mounted cantilever crane 4. Gantry cantilever crane 5. Mobile cantilever crane 6. Double-arm cantilever crane 7. Wall-traveling cantilever crane

    2024

    04-02

    What are the precautions for using a single girder crane?

    (1) Each crane must have a sign indicating its rated lifting capacity displayed in a prominent location. (2) No one is allowed on the bridge or to be transported by the hook during operation. (3) Cranes must not be operated without a valid operating certificate or under the influence of alcohol. (4) Operators must remain focused during operation and are not allowed to talk, smoke, or engage in unrelated activities. (5) The crane must be kept clean; equipment, tools, flammable materials, explosives, and hazardous materials must not be placed haphazardly. (6) Cranes are not allowed to be overloaded. (7) The following conditions prohibit lifting: insecurely bundled items; overloaded machinery; unclear signals; slanted pulls; objects buried or frozen in the ground; people on the lifted object; flammable materials, explosives, and hazardous materials without safety measures; overflowing liquids; wire ropes that do not meet safety requirements; malfunctioning lifting mechanisms. (8) When a crane operates on a clear path, the hook or lifting device and the bottom of the lifted object must be at least 2 meters above the ground. When crossing obstacles, it must be at least 0.5 meters above the obstacle. (9) For lifting objects less than 50% of the rated lifting capacity, two mechanisms are allowed to operate simultaneously; for objects greater than 50% of the rated lifting capacity, only one mechanism may operate. (10) For bridge cranes with main and auxiliary hooks, do not raise or lower both hooks simultaneously (with special exceptions). (11) Welding or hammering on lifted objects and working underneath them is not allowed (unless supported). (12) Inspections or maintenance work can only be performed after a power outage and when a sign indicating power outage work is hung on the switch. If work must be done with power on, safety measures must be in place, and a designated person must supervise. (13) It is prohibited to throw items carelessly from the crane. (14) Limit switches and interlock protection devices must be checked regularly. (15) Using limit switches as a method of stopping is not allowed. (16) If there are issues with the lifting brake, lifting heavy objects is not allowed. (17) Lifted objects must not operate over people or equipment. (18) When welding a part of the crane, a dedicated ground wire must be set up; the crane body must not be used as a ground wire. (19) When the hook is at the lower limit position, there must be at least two safety rope loops left on the drum. (20) Cranes must not collide with each other, nor is it allowed to use one crane to push another crane to work.

    2024

    04-02

    Fixed column cantilever crane | Vertical column cantilever crane | Fixed column slewing crane

    The fixed column type slewing jib crane (also known as: column type cantilever crane, column type slewing crane, column type cantilever hoist, fixed column type slewing hoist, fixed column type cantilever crane) is a new generation of lightweight lifting equipment designed to meet modern production needs. The fixed column type slewing crane is a specialized lifting device designed by our factory according to user requirements. It features a novel, reasonable, and simple structure, convenient operation, flexible rotation, and a large working space, making it an energy-efficient and high-performance material handling equipment. It can be widely used in factories, workshops, production lines, assembly lines, and the lifting of heavy objects in warehouses, docks, and other locations. The fixed column type slewing crane consists of a column device, a slewing device, a jib device, and a chain electric hoist, mainly including the upper column, lower column, main beam, main beam tie rods, lifting mechanism (chain electric hoist), slewing mechanism, electrical system, ladder, and maintenance platform. The lower end of the column is fixed to a concrete foundation, and the jib can rotate according to user needs. The rotation part is divided into manual rotation and electric rotation. The chain electric hoist is installed on the jib track for lifting heavy objects. The fixed column type slewing crane is equipped with a highly reliable chain electric hoist, making it especially suitable for short-distance, frequent, and intensive lifting operations. It is characterized by high efficiency, energy saving, ease of use, small footprint, and easy operation and maintenance. The chain electric hoist has the function of lifting and moving back and forth on the beam, and the jib beam can be driven by the reducer on the slewing device to perform rotational movement. The electrical control box is installed on the chain hoist. Henan Zhongtian Heavy Industry is a professional manufacturer of cranes, and we welcome you to visit our factory for inspection.

    2024

    03-21

    What safety devices are there for lightweight cranes?

    What safety devices are there for light cranes? To ensure the safety and reliability of lifting operations, cranes are equipped with comprehensive safety devices to protect machinery or alert operators in case of accidents, thus providing safety protection. The working intensity of a cantilever crane is light, and the crane consists of a column, a rotating arm drive device, and an electric hoist. The lower end of the column is fixed to a concrete foundation with anchor bolts, and the cantilever rotation is driven by a cycloidal pinwheel reducer. The electric hoist runs left and right on the cantilever I-beam and lifts heavy objects. The suspended crane can be simply hung from the roof of a building or upper structure, and the crane track does not require additional support, making it easy and reliable to install, whether serving part or all of a workshop, at a lower cost. The single-beam suspended crane is composed of KBK standard components, allowing for quick and reliable material transport and accurate positioning of various components within a specific area. The lifting capacity can reach: 1000kg, with a span of up to: 6m. The main benefits of the suspended crane include a lifting capacity of up to 2000 kilograms, lightweight installation, safety, etc. Wire ropes are essential accessories for cranes, including phosphated wire ropes, galvanized wire ropes, and smooth wire ropes. 1. Overflow valves in the hydraulic system: These can suppress abnormal high pressure in the circuit to prevent damage to the hydraulic oil pump and electric motor or engine, and to prevent overload conditions. 2. Boom luffing safety device: In the event of an accident, if the high-pressure hose or oil pipe in the boom luffing cylinder circuit bursts or is cut, the balance valve in the hydraulic circuit will act to lock the working oil from the lower chamber of the cylinder, preventing the boom from descending, thus ensuring operational safety. 3. Boom telescoping safety device: In the event of an accident, if the high-pressure hose or oil pipe in the boom telescoping cylinder circuit bursts or is cut, the balance valve in the hydraulic circuit will act to lock the working oil from the lower chamber of the cylinder, causing the boom to retract automatically, thus ensuring operational safety. 4. Height limit device: When the hook is lifted to a specified height, it touches the limit weight, opening the travel switch (SQ), and the "overrun" indicator light will illuminate, simultaneously cutting off operations such as hook lifting, boom extension, and boom lowering to ensure safety. At this point, the operator can only lower the hook, retract the boom, or raise the boom to release the limit weight, restoring normal operation. In special cases where slight overrun operations are still needed, the release button on the instrument box can be pressed, at which point the limit function is released, but operations must be conducted with extreme caution to prevent accidents. 5. Leg locking device: In the event of an accident, if the high-pressure hose or oil pipe leading to the leg vertical cylinder ruptures or is severed, the bidirectional hydraulic lock in the hydraulic system can seal the pressure oil in the two chambers of the leg locking cylinder, preventing the legs from retracting or swinging out, thus ensuring the safety of lifting operations. 6. Lifting weight indicator: The lifting weight indicator is set on the side of the basic arm, allowing the operator in the control room to clearly observe it, accurately indicating the boom's elevation angle and the corresponding rated lifting capacity of the crane under specific working conditions. 7. Lifting characteristics table: Located on the lower wall panel at the front side of the control room, this table lists the rated lifting capacities and lifting heights for various arm lengths and working ranges for reference during operation. During lifting operations, the values specified in the table must not be exceeded. To ensure the safety and reliability of lifting operations, cranes are equipped with comprehensive safety devices to protect machinery or alert operators in case of accidents, thus providing safety protection.

    2024

    02-23

    Crane Maintenance

    Daily inspections are an important part of crane maintenance. They mainly include the following aspects: 1. **Appearance Maintenance**: Both the exterior of the crane and its metal components need regular cleaning, oiling, or painting to prevent rust. 2. **Electrical System Check**: Areas such as the motor bus and terminal connections need to be checked for looseness, and dust on electrical components should be regularly cleared to ensure the electrical system operates normally. 3. **Shutdown Maintenance**: Regularly check the brakes, interlock devices, and other safety protection devices for normal operation, and inspect for unusual noises or faults before shutting down. 4. **Brake Adjustment**: Regularly adjust the braking force and travel of the brakes to ensure their reliability. 5. **Regular Replacement of Parts**: Periodically replace wear-prone parts, such as wire ropes and brake shoes, to ensure the crane operates normally. ### I. Lubrication Friction can easily occur during crane operation, and proper lubrication can reduce friction loss and the incidence of failures. Lubrication mainly includes areas such as struts, booms, gears, bearings, and wire ropes. The type and amount of lubricant should be selected based on actual conditions. ### II. Electrical System The electrical system is an important part of crane maintenance. The following maintenance tasks need to be performed: 1. Check the power supply voltage to ensure normal operation. 2. Regularly clean, inspect, and tighten the motor windings, terminal connections, and contactor contacts. 3. Check the safety of electrical components, such as fuses, circuit breakers, and insulation resistance. 4. Inspect cables, motors, control cabinets, and other equipment based on usage, and ensure they are clean. ### III. Corrosion Prevention Cranes often operate in various environments, so corrosion prevention is also an important aspect of maintenance. Corrosion prevention mainly includes protective measures for the crane body and metal components, such as painting and spraying. ### IV. Fasteners Fasteners on the crane are also an important maintenance item. Regularly check bolts, nuts, and other fasteners for looseness or corrosion, and perform tightening and replacement as needed.

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    Specializing in the production, manufacture and sales of cranes

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    400-037-3877

    Address: East Section of Weishili Road, Lifting Industrial Park, Changyuan City, Henan Province

    Tel: +86-0373-8718880

    E-mail: 16712726@qq.com

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