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Gust is the most serious natural disaster that threatens the safety of port portal crane. The wind resistance of some port cranes is not optimistic, and wind disaster accidents occur frequently. Based on the analysis of some classic cases of wind disasters at home and abroad, this paper finds out the weak links of the wind proof ability of port portal crane, and puts forward the countermeasures to improve and enhance the wind proof ability of port portal crane.

Through the brief introduction of the working principle of the brake motor, combined with the theoretical analysis of the brake motor dynamic brake torque test method (directtest method and indirect test method), it is concluded that the selection of the test method is closely related. According to the sensor type, installation position, test range and accuracy requirements. The differences between direct measurement method and indirect measurement method are compared, their respective measurement methods are introduced, and their advantages and disadvantages are summarized. According to the test requirements, the appropriate test method can be selected, and the direct test method and indirect test method can be selected at the same time, to ensure the safety and stability of product

This paper introduces an evaluation method of mechanical performance of portal crane main steel structure. The risk factors of portal crane are investigated from five aspects of strength, stiffness, corrosion, crack and local stability. Through quantification, each evaluation index is transformed into a quantitative value that is easy to identify, which directly reflects the state of the steel structure of the crane. Scientific and reasonable evaluation results are beneficial to maintenance and use of portal crane, and it can save energy and reduce emission, reduce cost and increase efficiency.

In this paper, the effect of wind load on port portal crane is simulated by experimental method, and the anti-wind and anti-skid performance of port portal crane is tested. This experiment is an important method to study the action mode of wind force on port portal crane and the anti-wind and skid resistance of port portal crane, and provides an important basis for the evaluation of wind-proof safety performance of port portal crane.

This paper introduces the purpose and significance of safety evaluation of hoisting machinery, summarizes various evaluation method, and discusses the advantages and disadvantages of various safety evaluation methods, analyzes the current situation of safety evaluation of hoisting machinery in China, and puts forward corresponding suggestions on energy saving and emission reduction of hoisting machinery through the evaluation.

Due to the long service life of a quayside container crane in an enterprise, there is slight corrosion on the surface of metal structure, which has potential safety hazard. In order to master the technical condition of the metal structure of the crane, the stress distribution and change information of the crane are obtained by dynamic and static stress testing and non-destructive testing. According to the analysis and test results, the safety assessment of the whole machine is completed and reasonable management suggestions are put forward.

Secondary metabolites are considered to be the major compounds in Cordyceps with anti-tumor, anti-aging and immunity-enhancing effects. The molecular structures of secondary metabolites form the basis for the development and utilization of Cordyceps. Metacordyceps neogunnii is an important Cordyceps resource, but less study has been made on the molecular structure of its secondary metabolites. In this study, gas chromatography-mass spectrometry (GC/MS) and ultra performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF/MS) were used to analyze and identify the secondary metabolites from CH3OH/H2O extract of Metacordyceps neogunnii. The results show that a total of 22 compounds were identified by GC-MS, including 2 n-alkanes, 1 isoparaffin, 1 cycloalkane, 6 olefins and 13 esters. The predominant compounds were (E)-ocimene, (E)-β-ocimene, methyl oleate, dioctyl adipate, methyl palmitate and methyl linoleate, obtained by means of GC/MS. Five distince classes of secondary metabolites were speculated: 3 polypeptides, 2 esters, 1 isoflavone, 1 isoindrone and 3 amides, from which 10 compounds were detected using UPLC-Q-TOF/MS. (R)-N-((1-(((9H-fluorene-9-yl) methoxy) carbonyl) pyrrolidine-2-yl) methyl)-N-(2-(6-benzoylamino-9H-purin-9-yl) acetyl) glycine, benzyl (5-(2-((3-(2, 3-dihydrobenzo[b] [1, 4] dioxin-6-yl)-4-carbonyl-4H-chromene-7-yl) oxo) acetylamino) amyl) carbamate, 5, 5’-((propane-2, 2-diyl (4, 1-phenylene)) bis (oxo)) bis (2-(naphthalene-1-yl) isoindoline-1, 3-dione), 1-dodecylazepine-2-one and other compounds were the first detected in Metacordyceps neogunnii.