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When should you not use an electric hoist?

As a core representative of light and small lifting equipment, electric hoists, with their advantages of compact size, easy installation, and simple operation, have been deeply integrated into scenarios such as workshop transportation, warehouse loading/unloading, and equipment maintenance, becoming an “efficient assistant” in industrial production. However, their “light and small” characteristics also imply a lower safety margin. Once safety boundaries are breached, it can lead to equipment failure at best, or load drops and casualties at worst. So, what are the specific scenarios where an electric hoist absolutely should not be used?     I. Personnel and Management: When the Primary Safety Line Fails   The safe operation of an electric hoist primarily relies on “human compliance” and “management oversight.” When operator qualifications are lacking or management procedures are absent, even the most reliable equipment becomes a carrier of risk. (1) Operator is Unlicensed or Lacks Skill Regulations stipulate that electric hoist operators must obtain relevant operating certificates and be familiar with the structure, performance, and operating procedures of the equipment they operate. Unlicensed personnel, due to a lack of professional knowledge, are prone to “common sense errors”: such as mistakenly pressing the “down” button instead of “up,” causing the...

What is an overhead crane used for?

An overhead crane, also known as an “ bridge crane” or “traveling crane“, is based on elevated rails on both sides of a factory building. It operates in coordination with a longitudinal main trolley, a transverse auxiliary trolley, and a vertical hoisting mechanism, enabling precise three-dimensional displacement of heavy loads within the covered rectangular space. Its rated lifting capacity ranges from 1 ton to thousands of tons, and it is widely used in various industrial fields. Its core purposes can be systematically categorized as follows:     I. Classification by Core Functions   1. Heavy Load Handling and Transfer This is its most fundamental function. It replaces the primitive, inefficient, and high-risk manual handling, enabling fast and safe movement of materials in workshops, warehouses, and storage yards.   2. Precision Alignment and Assembly In modern high-end manufacturing, the role of overhead bridge cranes goes far beyond handling. With millimetric or even higher positioning accuracy and micro-speed lifting functions, they can accurately align and install huge components weighing hundreds of tons.   3. Special Process Operations By equipping with various specialized lifting tools (such as C-hooks, vacuum suction cups, electromagnetic discs, and rotating hooks), it can complete complex operations such as...

What are the electrical accessories of a crane and the components of its electrical control box?

1.Circuit Breaker The circuit breaker is a core safety protection device in the electric control box. When a hazardous fault occurs in the circuit, it quickly cuts off the power supply to prevent equipment damage or safety accidents (such as fire and electric shock). 2.Main Contactor It is the core executive component that connects the commands of the wireless remote control and the high-power main circuit of the crane. In essence, it serves as a “power switch hub” that receives signals from the wireless remote control and realizes the “controlled on-off” of the crane’s main circuit. 3.Phase Sequence Protector The phase sequence protector is a safety protection device in three-phase AC circuits that ensures the normal phase sequence and voltage of the power supply. Its core function is to detect the phase sequence, phase loss, and voltage stability of the three-phase power supply. When the power supply is abnormal, it cuts off the circuit to prevent equipment damage, misoperation, and safety accidents. 4.Control Transformer It is the core conversion device that connects the high-voltage main power supply and the low-voltage control circuit. Its functions include: reducing voltage to prevent burnout of control components; providing electrical isolation to prevent leakage interference,...

What is the difference between a hydraulic winch and an electric winch?

In industrial and engineering sectors, winches serve as critical lifting and traction equipment, whose performance directly impacts operational efficiency, safety, and operating costs. Hydraulic and electric drives, as two mainstream technical routes, each have distinct characteristics and applicable scenarios. Choosing between them is not a matter of pursuing so-called “more advanced technology” but rather making a systematic decision based on actual working conditions, load requirements, and environmental factors.    1. Core Differences: Power Transmission Mechanisms Determine Fundamental Performance   Hydraulic winches rely on a hydraulic system to transmit power. Typically driven by an engine or electric motor, a hydraulic pump converts mechanical energy into the pressure energy of hydraulic oil. The flow and pressure are regulated through control valves to drive the hydraulic motor, which outputs high torque and ultimately powers the drum. Their core advantages lie in smooth power transmission and strong overload capacity, making them particularly suitable for heavy-duty, low-speed, and continuous operation conditions. Electric winches use an electric motor as the direct power source. The motor’s speed and torque are adjusted through an electrical control system (such as a frequency converter or contactor), amplified by a gear reducer, and then drive the drum. The advantages of electric...