SU1240830A1 - Mine water withdrawal installation - Google Patents

Description

The invention relates to the drainage of underground workings, in particular, to devices for drainage with a series connection in parallel with the operation of pumps, which are located in Rus, mainly in the mines of ore minerals.

The purpose of the invention is: to increase the efficiency and safety of work by avoiding cavitation and the formation of air plugs.

The drawing shows schematically a mine drainage installation, a general view.

The mining plant has a drive pumping units 1 and 2, respectively, of the upper rusa 3 and lower rusa 4, vertical generation 5, check valves 6 and valves 7. high pressure and check valves 8 and low pressure valves 9, suction manifold 10, safety pipe 11 and pressure pipe 12.

Pump units 1 of the upper wheels 3 are equipped with a suction manifold 10 with a diameter that ensures the maximum possible performance of all parallel-running pump units 1 at a speed of movement of the fluid not more than 1 m / s. The lower point of the intake manifold 10 is located above the highest point of the pumping units 1. The suction manifold 10 has a lift of 0.03-0.05 on the side of the safety pipeline 11, and is connected by means of the latter to the atmosphere to divert and create free flow for the pump units 1 and 2. The pumping units 1 of the upper rooms 3 are equipped with manometric sensors 13 mounted on the safety pipe 11.

Gauge sensors 13 are included in the work control system and give an impulse to turn off the pumping units 1 of the upper ranks 3 at a reduced water level below the minimum allowable (emergency) and include them when the water level rises. Upper

part of the safety pipe 11 connecting the suction pipe. the reservoir 10 with the atmosphere (in order to avoid overflow) is located at a height exceeding the head below

located pumping units 1 at zero performance by 2.5%. The sections of the pressure pipelines 12 with low pressure check valves 8 are also connected with a rise in the direction of the intake manifold 10, equal to 0.03-0.05.

Pipeline 11, in addition to protecting the underlying pipelines 12 from water hammer when the check valve 6 of pump units 1 fails, protects them from cavitation, venting air bubbles, and together with sensors 13 installed on it serves as a performance regulator. Ascending slopes of the intake manifolds 10 and adjacent sections of onshore pipelines 12, when the angle is less than 0.03, do not ensure the removal of bubbles in the water flow;

an angle of more than 0.05 requires an increase in the height of the windings, which increase capital costs.

Such an installation provides the exception destructive

the effects of cavitation on the axle aggregates and the formation of blocking plugs, which allows to increase the reliability and safety of operation and, in general, to achieve more efficient drainage.

mil

y h

Editor 10. Sereda

Compiled by A. Prkov

Tehred N. BoppkePlo. Proofreader T. Kolb

Order 3460 / 23. Circulation 641Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

MINING WATER DRAINING PLANT, including pump chambers arranged in tiers along the working depth connected by sections of the pressure head with parallel connected pump units, connecting the latter with the lower sections of the pressure head, suction manifolds, safety pipelines adjacent to the collectors, pressure valves installed on the sections of the pressure head control system work and stop valves, characterized in that, in order to increase the efficiency and safety of work By eliminating cavitation and the formation of air jams, the control system is equipped with pressure gauges mounted on the safety pipelines, electrically connected to the drives of the pump units, the suction manifold of each pump chamber is located above the pump units with a slope ascending towards the safety pipe, the non-return valve of each section of the pressure head is installed on its upper part, which is inclined with an upward slope towards the intake manifold, · Rich ascending slopes suction reservoirs and adjacent discharge portions are stava angle equal. 0.03-0.05. .SU. „, 1240830 1 1240830