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Application of Level Switch in transfer of Mine Filling Material
Schematic diagram of mine filling material transportation
Level switch |
Relation to dielectric constant of medium |
Resistance to material buildup |
Installation |
False alarm |
Intrinsic Safety |
Cost-effective ratio |
Rotary Paddle level switch |
No |
poor |
easy |
Yes |
No |
Low |
Fork level switch |
No |
moderate |
easy |
Yes |
Yes |
moderate |
RF Admittance Level Switch |
Yes |
moderate |
difficult (to be adjusted) |
Yes |
No |
moderate |
Single rod vibrating level switch |
No |
poor |
easy |
Yes |
Yes |
low |
Imported double rod vibrating level switch |
No |
strong |
easy |
No |
Yes |
moderate |
Domestic double rod vibrating level switch |
No |
Strong |
easy |
No |
Yes |
High |
It is obvious to see from the above comparison that double rod vibrating level switch, which designed with nested internal and external vibrating rod, has more advantages under mining working condition than other level switches: maintenance-free, strong resistance to material buildup, easy installation and safer to operate.
After careful comparison between different brands and different types of level switches at home and abroad, an environmental protection engineering company in Beijing was convinced by the excellent quality of vibrating rod level switch from Jiwei and purchased Jiwei Tube-11 for one kilometer deep well test project in Tianjin. Sales engineer in Jiwei communicated with the customer and helped the customer place the order for Jiwei Tube-11ICXXWXML with Intrinsic Safety explosion protection. Tube-11 vibrating rod level switch is the first domestic double rod vibrating level switch. The probe is designed with a unique nest configured inner and outer double tube. The resonance frequency of the inner and outer vibrating tubes is precisely adjusted to the same value to reach complete resonance so that the instrument reaches to extremely high detection sensitivity and reliability. The measurable medium density can be as low as 0.02g/cm³. The ingress protection level of the instrument reaches to IP66 /IP67. Signal output is selected as a two-wire system. The external housing is made of T3 copper. The instrument has also been successfully certified for coal mine safety by the Safety Supervision Bureau China. 24 vibrating rod level switches from Jiwei have been working stably and reliably in the first phase of the project since they were put into use in 2018 and Jiwei Tube-11 double rod vibrating level switch has been well evaluated by the user.