Weite WGJ-1 anti-roll switch (hook limit switch)

1. Industry pain points​

In lifting operations, overwinding of steel wire ropes (where the hook rises above the safe height) is a major safety hazard. This can easily lead to:

• ​Steel wire rope breakageIt can cause heavy objects to fall, leading to serious equipment damage or casualties.
• ​Impact damage to structural componentsThe rapidly ascending hook or lifting gear violently impacts the crane components (such as the boom and trolley frame), causing deformation or damage.
• ​Production interruption and property lossThe shutdown, maintenance and compensation caused by the accident brought about huge economic losses.
  Traditional mechanical limit switches or manual observation not only have difficulty ensuring reliability but are also more prone to failure in harsh working conditions such as dust and humidity. There is an urgent need for a highly reliable and automated electrical protection method.

​2. Solution​
The WGJ anti-overwinding switch (also known as hook head limit switch/counterweight limit switch) is an electrical automatic protection device specially designed to address the risk of overwinding of steel wire ropes. The core of this plan lies in:

• ​Intelligent linkage mechanismThe switch works in linkage with a counterweight of an appropriate counterweight.
• ​Safety action triggerWhen the hook rises to lift the heavy hammer, the switch operates.Automatically cut off the power supply of the hoist and instantly connect to the braking systemForcibly stop the hook from rising.
• ​Height limit guaranteeThrough reliable physical linkage and electrical control, it ensures that the hook rises and falls within the set safe height range, effectively preventing overwinding accidents.
  This solution realizes fully automatic safety protection for key links in the lifting process.

​3. Core technology​

The outstanding performance of the WGJ anti-overwinding switch stems from its core design and manufacturing technology:

• ​Precision structural design"AdoptHigh-strength zinc alloy precision casting shellCompact in structure and durable, it can withstand the common impacts and vibrations in industrial sites.
• ​Ip66-level protection barrier​ ​The dust and water resistance rating reaches IP66Even in harsh environments such as dusty, water-spraying and humid conditions, the internal components of the switch can still work reliably and have a long service life.
• ​Preferred core components​ ​Select high-reliability contacts, switch mechanisms, springs and other precision componentsEnsure that the switch operates accurately, responds quickly and is durable.
• ​Intelligent working condition adaptationUniqueThe normally open/normally closed contact status can be adjusted on siteTechnology enables the switch to flexibly adapt to the requirements of different control circuits and has strong versatility.

​4. Core advantages​

The core advantages of the WGJ anti-overwind switch make it an ideal choice for lifting safety protection:

• ​Super strong protection, stable and reliableCast zinc casing +IP66 protection grade, carefully selected accessories ensure stable operation under various harsh working conditions, reduce maintenance requirements, and significantly enhance equipment and operation safety.
• ​Flexible adaptation, rapid deployment​ ​The status of the switch contacts (normally open/normally closed) can be quickly adjusted on siteIt can easily meet the requirements of different crane control systems. ​Installation and relocation are extremely simple and fastWhether it is factory installation, subsequent maintenance, or relocation and reinstallation after equipment upgrades, user feedback indicates extremely high efficiency and reduced downtime.
• ​Simple and efficient, user-friendlyThe design is intuitive and the operation logic is clear. Years of practice by users (including end users) have proven its effectivenessEasy to install, debug and maintain and reset​。

​5. Practical cases​

The WGJ anti-overwinding switch has been widely applied and verified in various mainstream lifting equipment due to its reliability and adaptability

• ​Widely applicable scenarios​
  • Bridge and gantry cranes (Standard application)
  • Truck cranes, tire-mounted cranes
  • Crawler crane
  • All kinds of bridge, gantry and rail-mounted cranes with booms, etc.

• ​Practical application effectIt has been successfully applied to lifting equipment in numerous large manufacturing workshops, ports and docks, logistics and warehousing bases, construction sites and other places both at home and abroad. After actual use and verification by users, this switch is in:
  • ​Effectively prevent overrolling accidentsFor many years, it has precisely triggered the protection action, reliably preventing rope breakage or equipment impact accidents caused by overwinding of the steel wire rope.
  • ​Reduce maintenance costsThe robust design and excellent protection have significantly reduced the failure rate and maintenance frequency caused by environmental factors.
  • ​Improve work efficiencyThe simple installation and debugging process, along with the feature that supports users to move and reset by themselves, significantly reduces downtime.

6. Technical parameters​

The specific technical specifications of the WGJ anti-overwinding switch are directly related to its reliability and applicability. According to the product illustration, the core parameters are clearly marked as follows:

• ​Electrical characteristics​
  • ​Wide voltage compatibility​ ​​12V 至 380V​"CompatibleDCand"Exchange ACPower supply system.
  • ​Current specificationThe rated current is​5A​The rated working current is​10A​​。
• ​Key components of mechanical linkage​
  • ​Minimum counterweight of the heavy hammer​ ​​≥ 1.9Kg​(Ensure that the hook can reliably lift the heavy hammer and trigger the switch action when it rises).
  • ​Standard wire rope length​ ​​0.85m​(Used to connect the hook and the counterweight).
• ​Installation dimensions​
  • Important installation hole spacing:​42.5mm​with​60mm​​。
  • Installation hole diameter​Φ10.3mm​​。
  • Reference length of the switch body​162mm​​。
• ​Complete work unit​
  • ​Configuration​ ​A complete anti-overwinding switch working unit must include the WGJ switch body, the matching counterweight and the switch connection wire​。