Before the start of the portable vacuum starter, the leakage protection circuit in the electronic protection device performs insulation detection on the insulated network of the controlled object. When the network insulation value is lower than the specified standard value, the implementation circuit of the electronic protection device is used. The operating power of the main circuit breaking element is cut off, and the breaking element of the main circuit cannot be closed, so that the portable vacuum starter achieves the leakage lock protection to the controlled object.

When the portable vacuum starter is used to control and protect the local fan, when the local fan starts, a signal is input to the wind power delay lock protection circuit of the portable vacuum starter, and the time-delay portable vacuum starter electronic protector Output a signal to the power switch of the mining face; the power switch of the mining face can only start after receiving this signal and send power to the other electrical equipment of the mining face; conversely, if the local fan fails While the portable vacuum starter protects and stops the local fan, the portable vacuum starter outputs a signal to the power switch of the mining work face; the power switch of the work face is cut off, and other electrical equipment of the mining work face is made. All blackouts occurred in an instant, and the implementation of the coal mine safety regulations requires that the power transmission must be aired first, and the stoppage of wind power must be requested.

When the portable vacuum starter is used to control and protect the water pump, the probe is put into the water, and the water pump can be automatically turned on and waterlessly shut down.

The main technical parameters When the power supply voltage is not lower than 85% of the rated value, the portable vacuum starter should be able to work reliably; when the working voltage exceeds 10% of the rated value, the portable vacuum starter should be allowed to work for a short time.

Phase-failure protection performance scale current multiple action time t initial state reset mode two-phase is 1105; a phase multiple scale current starts automatically resets wind power delay lockout protection performance action time, continuous adjustable delivery power supply within 10min vacuum portable start When the device controls the water pump, it can realize automatic shutdown without water and automatic start protection with water. The action time is less than 2 seconds. In particular, when two vacuum portable starters are used to control a counter-rotating local fan, the requirements for controlling and protecting the counter-rotating local fan can be met without any modification.

Drill Loader Bolter Integrated Equipment

· Drilling-Loading-Bolting Integrated Unit is with multi-usage,integrating multiple functions including drill jumbo, rock bolting machine, mucking loader, crusher and into one unit, which avoids the problem of multiple devices crossing each other in the roadway and the problem of tunneling in hard rock roadway can be solved comprehensively.
· Drilling, bolting, loading, digging, crushing and other functional modules are with reasonable layout for non-interference during the working. It not only reduces the repeated input of power equipment, but also reduce the purchase and maintenance cost of the whole machine.
· The drilling arm adopts double-triangle self-parallel mechanism and 360 ° flexible displacement mechanism, which can realize multi-position and multi-angle drilling.
· Folding type scraper plate, double chain scraper structure and large scope of dipper realize the efficient and reliable loading capacity.

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