In summer, it is not only the high temperature that brings troubles to the electric single-girder crane, but also the rainy season and typhoon, which bring more problems to the crane, such as humidity. For cranes, the humid environment not only easily causes some metal parts to corrode, but also affects the crane's electronic instruments, wires, electrical appliances and other components, and may even endanger life in severe cases.
If it is a crane equipped with an on-board air conditioner, dehumidification is easy, just turn on the air conditioner to remove the moisture. In addition, the following coup can also achieve the purpose of dehumidification for the crane, and at the same time, these coup can also be applied to all types of cranes.
First, touch up the exposed metal parts of the crane that lack the protection of the paint layer, and add another layer of protection to the crane by waxing. As for the base, chassis and other parts of the crane, paint is also adopted as far as possible to prevent the invasion of moisture.
Then, use sun exposure, desiccant, bamboo charcoal, etc. to remove the moisture and water vapor accumulated inside the crane. Placing bundles of old newspapers in the crane cab can also have a certain dehumidification and moisture-proof effect. Of course, keeping the inside and outside of the crane clean is also a problem that should be paid attention to.
In order to improve the cleanliness inside and outside the crane and prevent the problem of bacteria coverage caused by moisture, high temperature and other means can also be used to disinfect the crane when necessary.
The specifications and concepts mentioned in the hoisting machinery manufacturing license (including the type test filing) and the relevant specification documents and safety technical specifications for type testing have different connotations in different places. However, the specifications expressed in the manufacturing license (or filing announcement) refer to the main parameters of the lifting appliance.
The manufactured prototype (identified by type test) and the manufacturing conditions of the manufactured prototype (identified by appraisal review) are clearly defined. Therefore, in order to truly express the scope of a manufacturing unit's license, the manufacturing license can only be issued according to the model. In order to reduce the burden on enterprises, considering that many crane enterprises have been producing products for many years, from the actual situation, it is stipulated that within the scope of the manufacturing license, the series products of the same model are covered from high to low according to the specifications (note: in fact, the specifications Covering from high to low is worthy of further in-depth discussion in theory, and it is only an attempt at present).
And it is clear that as long as the provisions of Article 4 in the national quality inspection document are met, the type test that has passed does not need to be repeated, and when the crane license expires and the license is renewed, the varieties and models already specified on the license will not be repeated. Carrying out type test simplifies the procedure and facilitates the manufacturing unit. Most of the manufacturing units express their understanding and approval.