Practicing Safety Guarding-Baikete Safety Service Observation

According to Article 399 of "Coal Mine Safety Regulations", "the difference between the tension of any hoisting wire rope and the average tension shall not exceed 10%", otherwise, rope groove turning maintenance shall be carried out to restore the safety value. The drum rope groove of multi-rope friction hoist will gradually increase the diameter error due to long-term operation, which directly affects the tension balance of the wire rope. This problem is also a key factor affecting the service life of the rope groove liner and the safe operation of the hoist, and it is also the key to the daily safety maintenance of the friction hoist. Rope groove turning maintenance has the following important role Recently, Baikert was invited to a coal mine in Shandong to carry out rope groove turning and maintenance work. The mine uses JKM2.8 * 6 hoist with a running time of 6 years and uses 100 kt K25 high-performance friction liner. After on-site inspection, Baikert technicians found that the 2#, 5#, 6# rope oil cylinders were killed, the lifting cage deflected to one side, the tank ears scratched the pipe wood and other series of problems, the on-site conditions have seriously threatened the transportation safety. The measurement of each rope groove shows that 1#-6# ropes are 91.3, 90.86, 92.14, 92.12, 92.4 and 91.9 respectively. Many rope grooves have dangerous values of wear defects, and turning maintenance operations shall be carried out immediately to restore the safe values. After turning, the technician will lift the cage to the wellhead platform, level the oil cylinder and mark the position, and run at the maintenance speed. When the tank channel reaches the bottom of the well, the measurement of the oil cylinder stroke shows that the maximum deviation is about 200mm. On-the-spot inspection of the tank ear, the gap between the two sides of the pipeline wood is restored, and the problem before turning is obviously improved. After turning, the rope groove measurement shows that 1#-6# are 92.88, 93, 93.04, 93.02, 92.96 and 92.82 respectively. After 8 hours of operation, the stroke of the oil cylinder disappeared, which solved the problem of too small gap between the tank ear and the two sides of the tank road wood, and effectively guaranteed the safe operation of the hoist. Beckett is committed to multiple measures to solve the problem of wire rope safety. At present, through the data collected by the tension difference monitoring system, effective and accurate turning by turning robot is an important part to ensure the safety of wire rope, and it is also an important technological achievement of Baikete to promote intelligent safety innovation. Technological innovation has always been on the road, and guarding the safety of wire ropes is the eternal responsibility of 100 ketol.

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Wire rope nondestructive testing instrument magnetic field optimization distribution structure advantage

In the nondestructive testing of steel wire rope, the structure design of the detector is very important to the detection accuracy of steel wire rope. When the steel wire rope is in bending operation, its internal steel wire is also under force. Because the steel wire rope is composed of many steel wires and rope cores, it can produce buffer and structural deformation when bending or vibrating. Each steel wire also has pressure, tension and force states of running inner circle and running outer circle. The thicker the steel wire, the greater the impact. The bending of the steel wire itself is rigid bending, and the diameters of the steel wires that make up the steel wire rope are very different, so the structural parameters that will affect the accuracy of the detector are: magnet length, magnet thickness, armature thickness, armature length and other parameters. With the increase of the thickness and length of the magnet, the detection accuracy will be significantly improved, while the armature length is negatively correlated. In order to ensure the accuracy of the detection, the parameters of the wire rope detector are optimized according to the experimental scientific analysis, and the magnetic line distribution, magnetic field distribution and the strength analysis of the parameters are compared and verified. Eight groups of Hall elements are determined to be arranged circumferentially along the wire rope, which can sense LF (local damage) and LMA (metal cross-sectional area damage) dual-channel signals at the same time. When the surface of the steel wire is damaged, such as corrosion pits, wear, etc., the magnetic resistance increases and the magnetic flux decreases at the damaged place, causing the internal magnetic induction line to deform and twist. The dual-signal detector can accurately detect its internal and external broken wires, and scientifically quantify the metal cross-sectional area loss (LMA) caused by wear (LF), corrosion, etc. The magnetic field lines of the instrument are evenly distributed, the excitation effect is excellent, the magnetic flux leakage signal is obvious, the difference between different damage signals is large, the signal is clear, and the advantages are significant. The non-destructive testing instrument has been widely used in mining, marine engineering, bridge and other fields of wire rope nondestructive testing. After continuous research and service practice, Baikett has formed a scientific and standardized theoretical system and rich experience of wire rope detection technology, advocating to provide comprehensive solutions for different industries.

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