wire rope limit switch made in china

WGJ-1 A2B switch is used for lifting wire rope anti-volume limit an electrical automatic protection switch. It is an appropriate weight of the hammer supporting the use of hook up and down movement to hold up or disconnect or turn-on switch, put down the hammer to achieve the purpose of automatically cut off the hoist power supply connected braking system to limit rope over volume, and reach hook in the purpose of a certain height within the lift.

GJ-type anti-volume switch (hook limit switch) is used for lifting wire rope anti-volume limit an electrical automatic protection switch. It is an appropriate weight of the hammer supporting the use of hook up and down movement to hold up or disconnect or turn-on switch, put down the hammer to achieve the purpose of automatically cut off the hoist power supply connected braking system to limit rope over volume, and reach hook in the purpose of a certain height within the lift.

Yichang WTAU Electronic Equipment Co. Ltd is a national high-tech enterprise which located in the “Hydropower capital”— Yichang. WTAU is committed to researching , developing and producing safety devices for crane cranes , automatic monitoring control systems , etc. WTAU puts the principle “make sure the lifting equipments are operated safely and reliably” as our duty and takes the high-tech as the core. WTAU has awarded many patents and major achievements of science and technology. The Torque Limiter, Weight Limiter, Anemometer ,etc. which are researched independently are widely used in electrical, chemical, steel, metallurgy, construction, ports, shipping and other industries.

Overhead traveling crane is that iron and steel enterprise guarantees to produce the important tool of normally carrying out, for guaranteeing the overhead traveling crane safe operation, avoid causing human casualty accident, overhead traveling crane is furnished with rising end position killer on all, promptly limit the switch of the position that hoists, suspender is risen when being raised to end position, cut off motor power and main power source automatically, its effect is to prevent that suspension hook or other suspender from crossing elevator, breaks steel rope and suspender is fallen cause the accident.In order to guarantee safety, the overhead traveling crane lifting mechanism is generally adorned two limit switches, and one is spiral, one is weight hammer type, is arranged on the diverse location, controls different circuit interrupting devices respectively, avoid because the malfunctioning accident of rushing to summit that causes of limit switch plays the double insurance effect.

The mounting means of overhead traveling crane weight inhibiting device as shown in Figure 1 at present.Its principle of work is: overhead traveling crane weight inhibiting device mainly is made of weight 2, weight steel rope 3 and limit switch 6, when suspension hook 7 plays the rising end position, weight 2 is run on suspension hook 7 tops, by weight steel rope 3 limit switch 6 is opened, make the lifting mechanism outage, suspension hook 7 is no longer to the direction operation that hoists.When this overhead traveling crane weight inhibiting device is installed, suspension hook steel rope 1 passes from the collar of 40mm * 50mm, suspension hook steel rope 1 always has and weight or collar friction at 1,1 wearing and tearing of suspension hook steel rope are accelerated, starting during operation, braking too quickly too fast or askew skew to hang can cause suspension hook trip pendulum, the weight swing.And there is butter on suspension hook steel rope 1 surface, easily making fixedly, weight steel rope 3 is intertwined with suspension hook steel rope 1, make the eccentric hammer on the limit switch be in strained condition all the time, even rising, suspension hook is raised to the rising end position, run into weight and can not make limit switch 6 actions, do not have safety effect.And weight can be rolled onto on the fixed pulley with suspension hook steel rope 1, causes steel rope and weight to block on fixed pulley, damages fixed pulley when serious.

"We"ve numerous great employees customers excellent at promoting, QC, and working with kinds of troublesome difficulty inside the generation method for Hoisting Limit Switch , Hoist Limit Switch , hoisting limit switch , The quality of our products is equal to OEM"s quality because our core parts are the same with OEM supplier. The above products have passed professional certification and we not only can produce OEM-standard products but we also accept Customized Products order.

A limit switch is a critical component of overhead crane safety. Limit switches are electromechanical devices that regulate everything from household appliances to industrial machinery. For an overhead crane, they provide solid, established points of reference for maintaining efficiency, reliability and safety standards.

Limit switches have practically limitless applications in regulating crane operation to prevent potential incidents. For instance, when ropes come out of groove or in preventing two trolleys from impacting on the same bridge structure.

In addition, a limit switch keeps a crane from lifting loads above rated capacity. Another kind of limit switch prevents a hoist from reaching the upper block and rope drum. Yet another type protects motors from overheating.

Without overhead crane limit switches, the potential for harm is quite high. For this reason, each limit switch should be inspected and maintained regularly.

As they open or close electrical circuits, limit switches wear out over time. To monitor wear and replace switches before they fail, limit switches should be checked daily before a crane is used.

Konecranes has conducted extensive research to determine how many uses a limit switch is physically capable of performing. This provides essential information for developing inspection and maintenance programs.

Knowing how a limit switch works is important for understanding how the crane works and how these established set points keep the crane operating safely and efficiently.

In some cases, there may be multiple limit switches associated with a crane operation such as crane travel or hoist motion. The first switch will signal that the end of the safe travel limit is approaching and slows the crane motion. A subsequent switch will indicate that the end of the safe travel distance has been reached and stops the motion.

Hoisting motions may be served by several limit switches, which provide set points for safety and reliability. An initial limit switch will slow the hoist before it reaches the stop limitation. Slowing the hoist prior to reaching the limit decreases mechanical wear, as the hoist is traveling below maximum speed when the brakes set.

An additional limit beyond the stop limit—typically called the “ultimate limit”—prevents the hoist block from impacting the drum. The ultimate limit acts as a safeguard in the event the stop limit fails or is set improperly.

This extra limit prevents two-blocking—that is, when the hook block contacts the drum hoisting machinery. Two-blocking is one of the most dangerous incidents involving cranes, as it can snap wire ropes and cause dropped loads and other catastrophic accidents.

After being tripped, the ultimate limit may require a manual reset. This involves resetting a wedge component or lever so that an inspection can be carried out to determine why the crane reached this position and did not stop at the up stop limit position.

Limit switches can also be used for travel motions, providing consistent and predictable motion limitations without impact at end stops. In automated environments, lasers or encoders track positions of crane movements, and limit switches provide consistent calibration points to insure values being used are accurate for safety and reliable production.