The main structure of the new clean room electric hoist bridge crane includes a double steel structure main girder, the two ends of the structural main girder are connected with the cart end beam, and the trolley running track in the steel structure main girder is repeatedly cleaned. Electric hoist. In the design of the electrical control system and the trolley power supply cable, a towline is installed on one of the steel structure main beams, the trolley power supply cable is embedded in the towline, and the steel structure beam and the cart end beam, the clean room electric hoist, and the electrical system are all installed. Equipped with an anti-static inorganic anti-corrosion coating, this type of structure not only has a more stable structure, but also can avoid cable wear and has a very high dust-proof level, avoiding the adsorption of dust due to electrostatic problems. Its main advantages are:
①The running track of the trolley is made of stainless steel, which can reduce the wear degree and corrosion degree of the trolley during the operation, which can greatly reduce the problem of debris generated by the electric hoist during repeated operation;
②An electrostatic device is installed on the main beam of the steel structure, so the main beam is not easy to accumulate static electricity, which can avoid the problems of dust adsorption and hair adsorption;
③ The trolley is mainly made of stainless steel wheels, and a layer of inorganic anti-corrosion coating is applied on the surface of the wheels, so as to reduce the problems of wheel wear and falling debris;
④The selected inorganic anti-corrosion coating is a water-based zinc-chromium coating layer, which not only has excellent anti-corrosion properties, but also has no hydrogen embrittlement. It is suitable for high-strength stressed parts and can withstand temperatures of 300°C. It has strong adaptability in the application of high-strength components, and the coating is non-polluting and can be used safely;
⑤ The lifting hook is mainly made of stainless steel, to ensure that the selected material meets the DIN15401 standard, so that the hook, the sling and the sling will not appear more particles due to friction;
⑥ The hoisting rope is mainly made of high-strength fiber braided rope, which is light in weight, high in strength, strong in abrasion resistance, good in fatigue resistance, low in elongation, and strong in plasticity, and is coated on the hoisting rope. Conductive resin, which dissipates static electricity from the surface. The use of high-strength fiber ropes will not generate frictional dust during traction;
⑦The main body of the crane is mainly made of anti-corrosion and anti-friction polyurethane topcoat. This kind of topcoat has the characteristics of good after-gloss, no softness, no stickiness, etc. It has very high chemical resistance and water resistance.
The clean room electric hoist bridge crane proposed in this paper is very safe in structure, and has very low noise in practical applications, which can greatly reduce the wear and tear of trolley power supply and electric hoist operation, gather low static electricity, and prevent electrostatic adsorption, effectively making up for the traditional clean room electric hoist. The disadvantages of the hoist bridge crane also reduce the dependence on foreign technology, which can meet the needs of market development. For the power system, the crane mainly adopts the IP65 protection design (dust and water release), the metal parts are mainly made of stainless steel, and the Dacromet treatment method is applied to the surface of the connecting parts. A three-in-one geared motor is adopted, and a fully enclosed fanless cooling structure is used, which can further improve its dust resistance. Dacromet is also used in the two structures of the large car end and the connecting parts of the steel structure main beam. The processing method will not only reduce the impact on the surrounding environment, but also make the positioning more accurate. The structural parts, components and connectors involved in the electric hoist bridge crane in the clean room are cleaned in advance before assembly, so as to ensure the cleanliness of the interior as much as possible, and then install it on the basis of ensuring the plot.