SU1564095A1 - Mine pneumatic hoist - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to a lifting and transport machinery, in particular to pneumatic shaft hoists. The purpose of the invention is to increase the reliability of work and reduce energy consumption. Mine pneumatic lift contains two barrels with mounted lifting vessels with seals, air blowers located in the upper part of the lift and connected through channels with adjustable dampers with barrels, loading and unloading units of the lifting vessels. The upper parts of the trunks are equipped with valves. The upper and lower sections of the trunks are connected to a closed system with an additional duct system with turboexpanders. 2 Il.

Description

FIELD OF THE INVENTION The invention relates to a lifting and transport machinery, in particular to pneumatic shaft hoists.

The purpose of the invention is to increase the reliability of work and reduce energy consumption.

FIG. 1 schematically shows a shaft pneumatic hoist; in fig. 2 - lifting vessel, general view.

The mine pneumatic elevator contains vertical barrels 1, lifting vessels 2 with seals. The barrels communicate with channels 3, 4 in which adjustable flaps 5, 6 are installed to adjust the approach speed of the vessel. Air blowers 7 located in the upper part of the lift, through receiver 8, are connected to the barrel by pressure ducts 9-12 with controllable adjustable flaps 13, 14, 15. placed in them. Trunks communicate with the atmosphere through air ducts to the adjustable gate 16. In The trunks at the bottom and at the top are provided with openings for sealed doors 17 for loading and unloading lifting vessels. A dispenser 18 with a sliding tray 19 is used for loading. Lifting vessels are fixed on supporting devices 20, which are hydraulically operated in two parts. In the upper part of the barrel is placed a valve 21 for creating a neutral compartment 22 and a valve 23 for mounting the vessel and servicing it during operation of the device. The valves are controlled from the mine pneumatic network. In the lower part of the barrels, there is a pneumatic trap 24 for landing on the air cushion of vessels in emergency conditions, for example, if the support devices fail to 20. For purging and cleaning the trap, there are taps 25 from water and dirt, and for emergency landing of the vessel a damper 26 is provided for lifting it, which is connected to the mine pneumatic network.

To recover the energy of compressed air, the upper sections of the shafts are connected by ducts 27 with adjustable dampers 28, ducts 29-33 with controlled dampers 34-38 via turbo-components 39 with suction duct 40 (or the atmosphere through damper 41). In addition, the duct 42 with the valve 43 connects

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A discharge duct 9 with a suction duct 40, a turbo expander 39 for recovering the energy of compressed air when unloading (loading) the lifting vessel. The use of pipe expanders during the operation of the system directs the excess air through them to reuse it, carry out the air transfer from the barrel to the air blowers, reduce the inflow of moisture from the atmosphere and stabilize the thermal mode of operation of the trunks.

The lower sections of the barrels are connected by ducts 44, 45 with flaps 46, 47, 48 with an intake duct 40 and a barrel for controlling the speed of the vessel approaching the loading point, as well as air ducts 45-53 with flaps 54-58 via turbo-expanders 59 with the suction duct 40 (or the atmosphere through the flap 41) to recover the energy of compressed air. In addition, the duct 60 with the flap 61 connects the duct 9 to the duct 40 via a turbo expander 59 to recover the energy of the compressed air when loading (unloading) the lifting vessel.

The sensors 62, located along the trunks, give impulses during the passage of the vessel, determined its position. The valves 15 are designed for emergency braking of the vessel when moving up.

Lifting vessels contain guide roller supports 63, which are located crosswise on two levels. The vessel is open at the top and has openers 64 at the bottom. In addition, a sensor 65 is installed on the vessel to determine the position of the vessel in the barrel. Seals 66 are located on two levels and prevent air from flowing in the annular gap between the vessel and the barrel.

The lift works as follows.

To start the lift, close the valves 21, open the valves 23, the supporting devices 20 are brought to the working position. Empty lifting vessels 2 are introduced into the right and left neutral compartments 22, close the valves 23, start the air blowers 7 by opening the dampers 13, 14 and leaving the rest in a closed state. The right barrel is filled with air to the calculated overpressure (0.2 kgf / cm2). The right flap 16 is opened, holding the lifting vessel on the air cushion, the support devices are removed and the valve 21 is opened, the flaps 13, 16 are closed and the vessel is lowered under the load. After the vessel passes, the valves 21 close the valve 14 and open the valves 28, 35, 43, 48, 54, recuperating the compressed air energy in the turboexpanders 39 and 59. While maintaining the required overpressure under the vessel, they are removed to the working position 5

the lower support devices 20. When the vessel approaches the message loading, k. it is braked by covering the valve 54 and opening the valve 46, which regulate the speed of the vessel on the supporting devices. Putting the vessel on the supporting device 20, reduce the pressure in the barrel to atmospheric, opening the valve 46 closing the valve 21 and the valve 28,

48, 54. After the pressure is lowered, the lower compacted door 17 is opened and, after inserting the loading tray 9, the vessel is loaded from the dispenser 18. At the same time, preparation is made for lowering the left vessel in the order described above.

right trunk.

After the download is completed and the doors 17 are closed, the vessel is lifted. Opening the valve 14, the excess pressure under the vessel is adjusted to the calculated

0 (1 kgf / cm2). Then close the valve 43 w open the valve 16 and the valve 21, remove the supporting device. At the same time, the left barrel valve 21 is opened and the left vessel is lowered under loading. With the passage of the vessel, the valve 21 opens the valve 5 and closes the left valve 16.

Further operations for lowering the left vessel for loading are carried out in the order described for the right trunk.

When approaching the first vessel to the place of unloading it is slowed down, closing the valve 5 and opening the valve 6, which regulate the speed of approach of the vessel. After the vessel passes, the valve 21 opens the right flap 16 and, holding the vessel on the air cushion, removes the supporting devices 20 to the working position, closing the valve 21. Then opens the valve 28 and places the vessel on the supporting devices, reducing the pressure in the neutral compartment 22 to atmospheric. At the same time

0 open the right flaps 36, lowering the pressure in the barrel to the calculated (0.2 kgf / cm2) and left flaps 25, 43, recuperating the compressed air energy in the turboexpanders 39. After reducing the pressure in the barrel to the calculated damper 16, 36 is closed. Then, the upper sealing door 17 and the closures 64 on the vessel are opened and unloaded. After that, the entire system is considered finally brought into position.

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Claims (1)

Isorethorne formula A mine pneumatic elevator containing vertical barrels with gate valves blocking them, vertically movable vessels with seals placed in 5 barrels, air-blowers connected to the barrels, discharge air duct with controlled dampers, and 0 five five a suction duct, characterized in that, in order to increase reliability of operation and reduce energy consumption, it is provided with located in upper zones and lower sections of the turboexpanders, with an air duct system and controlled dampers connecting the discharge air duct to the suction side. eight, X ff / four/ 50 figure 1 66 63 -66 FIG 2