SU1752705A1 - Device for yielding loads from mine - Google Patents

Abstract

Use: miner climb in the vertical and steeply inclined trunks. SUMMARY OF THE INVENTION: Two cylindrical shafts are mounted in the shaft of the shaft: lifting 2 and discharge 3. At the bottom of the lifting shaft 2 (in the mine yard) a lock chamber 4 is mounted, joined to the barrel 2 by an airtight splice chamber 5 in which the automatic gate is located 6. Above the gate, spring-loaded cams 7 are installed in the lower part of the airlock chamber. Drain barrel 3 Consists of sections 10 and brake chamber 11 in the ore-yard; sections 10 and the brake chamber 11 are interconnected by sealed docking chambers 12, in which the automatic gates 13 are placed. 1 sludge.

Description

The invention relates to a mine lifting and can be used in vertical or steeply inclined shafts.

A device for lifting goods from a mine is known, comprising a shaft of a mine with two lifting compartments, a lifting winch with a rope wound on a drum, a pile driver with pulleys, a cargo vessel (skip).

The disadvantage of lifting is the rigid cyclicality of the lifting and, as a result, the limited possibilities of increasing the productivity of the lifting.

A device is known for dispensing cargo onto a surface comprising a sealed barrel for lifting conveyors, a barrel for lowering containers into a mine, a cable elevator, a loading chamber, a power cylinder, on the rod of which a platform for lifting containers is fixed, a hermetic lock chamber with a slide device at the upper end her, spring-loaded fists.

The disadvantage of this device is the high cost of the construction of the lift associated with the need for tunneling by the construction and operation of the cable elevator for lowering the containers.

The device is a high danger for destructive breakthroughs, as it uses a heavy fluid as a working fluid. The pressure on the lower horizons can reach 100 or more ati.

The purpose of the invention is to increase safety and reduce the cost of the construction of the lift.

This goal is achieved by the fact that in the device for the delivery of goods from the mine, containing containers located in the shaft, in the form of a piston, a lock chamber with a power cylinder, on the piston rod of which is fixed a platform for lifting containers, gate elements and spring-loaded locking cams, a shaft for lowering containers consists of several sections connected by hermetic docking chambers in which slide elements are installed, while the device is equipped with a lower section connected to the free end and a braking chamber, and the section height is determined from the equation:

n I PoSvztj Po SHo ² ( ^G + -iir) (Ho ^ + p ^ s)

P _o SHo mg + PoS _ _n

S-- ¹⁰ - p ^ —- VSaxc - 0 where Ho is the section height, m;

g - 9.8 kg / cm ² - acceleration of gravity: m - mass of the container, kg;

S is the cross-sectional area of the drain, cm ² :

Umaks - preset maximum speed of the container, m / s:

Po ~ initial pressure in the section, n / cm ² .

The proposed device, compared with the known one, significantly improves working conditions and safety precautions and, according to rough estimates, reduces the cost of lifting 1 ton of ore to a height of 350 m by 13-15 kopecks. .

The proposed device allows the descent of containers on an air cushion, which is formed during the free fall of a vessel, by compressing the air in a section hermetically sealed from above by a moving container, made in the form of a piston, from below by a slide gate.

The proposed device uses compressed air from a shaft system, or from a separate one, with a similar working pressure of 5-6 atm. Therefore, safe operating conditions are greatly enhanced.

The device does not require a special elevator device to carry out the descent of containers, the construction and operation of which will require significantly higher costs compared to the proposed device.

In the proposed device, the descent of the containers is carried out without involving extraneous energy sources and mechanical devices, elevators, lifting winches.

The separation of the drainage head into separate sections, the connection of them with hermetic docking boxes with automatic gates installed in them makes it possible to ensure any selected speed of movement of the containers during their descent. They also make it possible to lower containers using free fall.

The drawing shows the proposed device.

In the shaft of mine 1 two cylindrical shafts of lifting 2 and drain 3 are mounted, in the lifting shaft 2 in its lower part (in the ore mine) a lock chamber 4 is mounted, docked to the barrel 2 with a sealed docking chamber 5, in which the automatic gate 6 is located, above the gate 6 spring-loaded cams 7 are installed, in the lower part of the lock chamber 4 and the barrel 2 the air pipe 8 from the main network is connected.

Under the lock chamber 4, a master cylinder 9 is installed, a rod with a platform, the pore of which is located in the lock chamber.

The drain barrel 3 consists of sections 10 of the brake chamber 11 in the mine shaft: the sections 10 and the brake chamber 11 are interconnected by sealed docking chambers 12, in which automatic gates 13 are located.

Example p. A loading container 14 with a sealing device weighing for example 7 tons (container 2 tons, net 5 tons) is fed into the lock chamber 4, the door of which is hermetically closed, compressed air is supplied into the chamber, the gate valve 6 opens, the container 14 is lifted by means of a power cylinder 9 into barrel 2 to the spring-loaded cams 7, the slide gate 6 shuts off becoming, pumped compressed air moves the container up the barrel. Overpressure is required to move the container.

Reese ~ ¹⁰ , Nem ² , (1) nr where Ргр is the weight of the loaded container (for example, 7000 kg):

g is the radius of the stav (for example, 50 cm).

P - 7000 · 10 η .. /,.2 ^Reese “3.14 · 50 - ^{9 n / m} ·

The permissible number of simultaneously raised vessels η is determined from the expression o = · θ'θ = 5-3, (2) we take η = 5.

where Rrab is the working pressure of compressed air, for example 6 ati:

η - coefficient taking into account additional loads (resistance, etc.).

Upon reaching the day surface, the container 14 is picked up by known devices 15 (for example, a manipulator) and unloads it into the hopper 16, then. transferred and lowered into the first section of the drain barrel 3. in which its free fall begins. As the container falls in a hermetically sealed vessel, the air is compressed and obstructs ₍ the container moves, increasing as the compression ratio increases. For the specified technical parameters (container weight, barrel diameter, atmospheric pressure), the maximum permissible speed _(the speed corresponds to a strictly defined [ . the cell section H _about , which can be <<determined from the transcendental equation derived from the differential equation of motion of the body:

• nt '. Po S _h Z | _ | Po S But _h ² 19 ⁺ -sh ~ And ^But mg + PoS)

Po S But mg + Р _о S ,, 2 _ _Л

---- W —- Vmbkc-O, (3) where Ho is the section height, m;

g is the acceleration of gravity: m is the mass of the container, kg;

S is the cross-sectional area of the drain, cm ² ;

Vmskc ~ set maximum speed of the container, m / s ² ;

Po - the initial pressure in the section, N / m.

When deriving the equation, friction forces were not taken into account, therefore, the true value of Н _о will be somewhat underestimated, which will provide greater reliability.

The solution of this equation with respect to can be carried out by one of the known approximate methods. Substituting the values accepted in the example at Ро 1ата, and the maximum permissible speed

V _M aKc = 15 m / s, having solved the equation, we obtain Hoi = 1.07 m.

The container’s zero velocity at Reese = 0.9 ati (from formula 1) or 1.9 ata, which will correspond to the container lowering depth h _o equal to 56.3 (determined from the Boyle-Mariotte equation: PV = const).

The container, having plunged to a depth of 56 m, includes a sensor for driving the gate valve of the upper section 17, the gate valve opens, compressed air extends to the entire cavity of the second section, the height ^of which ¹ Foot is determined by the selection method from equation (3) and the equation:

_D (Po + · Reese) (Hoi - ho) + Po Nog, ^{Rm = i} --- (½¾¾ --- · <4) where Rog is the initial pressure in the second section.

Asked by the value of Feet. we determine the horn, and then, from equation (3), we check for compliance with the maximum permissible speed Umax. In this example, we get Leg = 180 m. In the same way, we determine, if necessary, the height of the subsequent sections. When the container passes through the last section, the compressed air is forced out through the valve 17. When approaching the slide gate to interface the section with the braking chamber 11, the shutter automatically opens, the container moves into the chamber, the shutter closes, and due to the fact that the chamber is hermetically closed and has low height (3-5 m), the speed is quickly extinguished and the container sits on the bottom of the chamber at a speed close to zero. After that, the chamber doors are opened and the container is moved to the place of loading.

Claims (1)

Claim A device for dispensing goods from the mine, 5 containing containers located in the shaft of the piston in the form of a piston, a lock chamber with a power cylinder, on the piston rod of which a platform for lifting containers is fixed, slide ele- ments 10 / ·. cops and spring-loaded locking cams, characterized in that, in order to increase safety and reduce construction costs, the shaft shaft for lowering containers consists of several sections connected by airtight docking chambers in which slide elements are installed, while the device is equipped with a connected to the free end lower section of the brake chamber.