Recently, the shield machine used large-tonnage vacuum suction cups in Tiejian Heavy Industry to successfully test and pass the factory acceptance, and was recognized by customers. It became the first vacuum suction cup for large-diameter shield machines with independent intellectual property rights in China, filling the domestic host enterprises. Homemade tube piece vacuum suction cup blank. At the same time, the vacuum suction cup is one of the core components of the large-diameter shield machine. Its successful development has provided a good demonstration effect for promoting the localization of key components of large-diameter shield machine.
Compared with the traditional mechanical gripping tube method, the vacuum suction cup grabbing tube has the characteristics of fast gripping speed, strong carrying capacity and high reliability, and the vacuum chuck device has high technology content and complicated manufacturing process. Therefore, the vacuum chuck device is generally configured in a large-diameter shield machine (the diameter of the cutterhead is Φ8m or more). The technical difficulties are mainly reflected in the welding deformation control of large-area curved steel plates, the airtightness control of large-capacity vacuum containers, and large size. Vacuum suction cup industrial test and other aspects.
The successfully developed vacuum suction cup will be applied to the ZTE8800 earth pressure balance shield machine, the maximum adsorption capacity will reach more than 20 tons, and the length of the adsorption tube will last more than 4 hours under the condition of broken electrical (the foreign standard design standard for foreign products is 30). Minutes), the cost is lower than 30% of similar foreign products.
It is reported that the self-developed vacuum suction cup for Φ12m diameter shield machine is about to enter the factory test stage.
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