RU176140U1 - PNEUMATIC PORTION CHARGER - Google Patents

Abstract

The pneumatic batch air charger belongs to the mining industry and can be used to load boreholes and wells of any direction with granular explosives (hereinafter - BB). The technical result of the claimed utility model is to increase the service life of the air batch charger by increasing the wear resistance of the safety net. The technical result is achieved by account of the use of a pneumatic batch charger containing a hopper, safety net, pneumatic cylinder with a piston and a rod, a stand, a locking cone, a metering chamber with a distribution cylinder, connected to the pipeline, a liquid component dispenser with a nozzle, connected to the pipeline and the pneumatic cylinder, a control valve through the air hose connected to the pneumatic cylinder, a tripod, while the safety net is made of a mixture containing 98.0 ± 1.0 wt. % low pressure polyethylene (HDPE) and 2.0 ± 1.0 wt. % concentrate glidants.

Description

The utility model relates to the mining industry and can be used for loading boreholes and wells of any direction with granular explosives (hereinafter - BB).

Batch chargers allow mechanizing the loading of holes, thereby increasing labor productivity during blasting.

Known designs for portioned chargers (ed. St. USSR No. 325377, 01/01/1973, Kazakhstan patent No. 24138, 06/15/2011, Kazakhstan patent No. 21953, September 14, 2012) containing a hopper, a pneumatic cylinder with a piston and a hollow rod, dosing tank, shut-off valve, discharge pipe, air and transport pipelines.

These batch chargers use granular explosives in a dry state. The propulsion of explosives into holes and boreholes is carried out by means of compressed air (pneumatic charging). At the same time, there is an intense emission of explosive dust and electrification, which can lead to an explosive situation even before the explosives enter the boreholes and wells. There is also a spill of explosives from the well into the soil (http://mirznanii.com/a/24298/metod-shpurovykh-zaryadov-i-mekhanizirovannoe-zaryazhanie-skvazhin). The data presented indicate the lack of effectiveness of the design of portioned chargers.

The known design of the batch charger ZP-2 (http://www.studfiles.ru/preview/2828283/paqe:18/), containing a hopper, safety net, pneumatic cylinder with a piston and rod, a rack, a locking cone, a metering chamber with a distribution cylinder connected to the pipeline, a dispenser of liquid components with a nozzle connected to the pipeline and the pneumatic cylinder, a control valve connected to the pneumatic cylinder through an air hose, a tripod, while the charger parts are polyethylene.

The presence of liquid (water) sprayed through the dispenser onto granular explosives does not affect the quality of the explosion and thus eliminates dust formation, while the sensitivity of explosives to friction and the possibility of accumulation of static electricity are reduced, and the spillage of explosives from wells is reduced (http://mirznanii.com / a / 24298 / metod-shpurovykh-zaryadov-i-mekhanizirovannoe-zaryazhanie-skvazhin).

It is known that the filling of explosives into a batch charger occurs through a safety net, which, like other charger elements, is made of low-pressure polyethylene (HDPE), which differs among other plastics in its hardness, rigidity, and strength. However, backfill of explosives in the form of granules leads to increased wear of the safety net due to the action of friction forces, which reduces the service life of the charger.

The technical result of the claimed utility model is to increase the service life of the pneumatic batch charger by increasing the wear resistance of the safety net.

The technical result is achieved through the use of a pneumatic batch charger containing a hopper, a safety net, a pneumatic cylinder with a piston and a rod, a stand, a locking cone, a metering chamber with a distribution cylinder connected to the pipeline, a liquid component dispenser with a nozzle connected to the pipeline and the pneumatic cylinder, a crane control, through an air hose connected to the pneumatic cylinder, a tripod, while the safety net is made of a mixture containing 98.0 ± 1.0 wt. % low pressure polyethylene (HDPE) and 2.0 ± 1.0 wt. % concentrate glidants.

The glidant concentrate is a mixture containing 6.0 ± 0.5 wt. % oleamide, polyamide and similar synthetic materials and 94.0 ± 0.5 wt. % high pressure polyethylene (LDPE). The quality of the sliding additive concentrate does not depend on the synthetic material used, the choice of one or another component affects only cost indicators.

As is known, concentrates of sliding additives are designed to reduce the coefficient of friction of polymeric materials and improve their technological characteristics (http://rosproizvoditel.ru/goods/4613-kontsentraty-skolzyashchikh-dobavok-basko). The manufacture of a charger safety grill based on a sliding additive and HDPE helps to reduce friction when loading granular explosives, which increases wear resistance and increases the service life of the equipment.

The inventive utility model is illustrated by graphic materials, where the figure depicts a pneumatic batch charger, consisting of a hopper 1, a safety net 2, a pneumatic cylinder 3 with a piston 4 and a rod 5, a rack 6, a locking cone 7, a metering chamber 8 with a distribution cylinder 9 connected to pipeline 10, a dispenser of liquid components 11 with a nozzle connected to the pipeline 10 and the pneumatic cylinder 3, the control valve 12, through the air hose 13 connected to the pneumatic cylinder 3, the tripod 14. In this case, the safety net 2 and cook from a mixture containing 98.0 ± 1.0 wt. % low pressure polyethylene (HDPE) and 2.0 ± 1.0 wt. % concentrate glidants.

To obtain a concentrate of glidants, 6.0 ± 0.5 wt. % oleamide, polyamide and similar synthetic materials and 94.0 ± 0.5 wt. % high pressure polyethylene (LDPE). Then 2.0 ± 1.0 wt. % of the resulting mixture is added to 98.0 ± 1.0 wt. % low pressure polyethylene (HDPE). After that, the safety grid is obtained by the known method of casting: the resulting material is transferred to a liquid state (130-135 ° C), filled with a mold, and then the curing process is carried out.

The following are examples of implementing a utility model.

Example 1

To obtain a concentrate of a sliding additive, 6.0 wt. % oleamide and 94 wt. % LDPE. Next, the safety grill is made of a mixture containing 96.5 wt. % (PND) and 3.5 wt. % concentrate glidants.

Results: the safety grill can be easily removed from the mold. The product has a gloss. A strong glide is observed, which does not allow high-quality welding of the safety grill on the pneumatic batch charger, which leads to its breakdown during the loading of the granular explosive.

Example 2

To obtain a concentrate of a sliding additive, 6.0 wt. % oleamide and 94.0 wt. % LDPE. Next, the safety grill is made of a mixture containing 99.5 wt. % PND and 0.5 wt. % concentrate glidants.

Results: the safety grill is hardly removed from the injection mold. The safety grill is mounted by welding on a portioned pneumatic charger. When loading a granular explosive, it adheres to the cells of the safety grill. When conducting 100 loads of granular explosives through the safety grill, most of its cells are clogged with adhered explosives, significant signs of wear are visible, and further use of the grill is impossible.

Example 3

To obtain a concentrate of a sliding additive, 6.0 wt. % oleamide and 94.0 wt. % LDPE. Next, the safety grill is made of a mixture containing 98.0 wt. % PND and 2.0 wt. % concentrate glidants.

Results: the safety grill can be easily removed from the mold. The product has a gloss. The safety grill is mounted by welding on a portioned pneumatic charger. When loading a granular explosive, it does not stick to the cells of the safety grill. When conducting 100 loads of granular explosives through the safety grill, slight signs of wear are visible, while further use of the grill is possible.

Thus, the manufacture of a safety net using a sliding additive concentrate helps to reduce the friction force when loading granular explosives, which increases its wear resistance and, in general, increases the life of the charger.

Claims (2)

1. Portioned pneumatic charger, characterized in that it comprises a hopper, safety net, pneumatic cylinder with a piston and a rod, a stand, a locking cone, a metering chamber with a distribution cylinder connected to the pipeline, a liquid component dispenser with a nozzle connected to the pipeline and the pneumatic cylinder, a crane control, through an air hose connected to the pneumatic cylinder, a tripod, while the safety net is made of a mixture containing 98.0 ± 1.0 wt. % low pressure polyethylene (HDPE) and 2.0 ± 1.0 wt. % concentrate glidants. 2. The charger according to claim 1, characterized in that the concentrate of the sliding additive is a mixture containing 6.0 ± 0.5 wt. % oleamide or polyamide and 94.0 ± 0.5 wt. % high pressure polyethylene (LDPE).

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