Percussion device

FIELD: mining industry.

SUBSTANCE: said invention relates to mining industry, building and construction, and metallurgy, in particular, to percussion devices for disintegration of rock and concrete, ripping of frozen soil and filled ground compaction. The percussion device incorporates body 1 with located therein coaxial straight case 6, the lower end of which is rigidly secured to the bottom end of body 1; in its axial bore 26, together with body 1, travelling generatrixes of arming 7, overflow 8, drain and gas 11 cavities are installed, as well as knocker 4 with piston hook 5 in the middle section, stationary interfaced with inner side of straight case 6 and coaxial annular step valve 12 encircling knocker 4 and straight case 6. The said valve 12 has four outer and three inner steps on side surfaces. Valve 12, along the side of the smallest upper step, is stationary interfaced with body 1 and has a circular groove 15. Circular groove 15 is located between two upper outer steps 13, 14 and, together with body 1, forms a ring channel, which interconnects arming cavity 7 with pressure line in the lowermost position of valve 12, in which the bottom end of the smallest inner step of the latter contacts the free end of straight case 6, and is interfaced with it along the side surface of the medium inner step. The largest inner step of valve 12, together with straight case 6, forms annular slot 25 of specified size, which connects arming cavity 7 of the device with isolated cavity between straight case 6 and valve 12 and connected to the said ring channel by means of radial openings 9 in the side wall of the largest step of valve 12.

EFFECT: improved efficiency and reliability of the percussion device.

5 cl, 3 dwg

 

The invention relates to mining, construction and metallurgy, namely, devices percussion for breaking rock, concrete, loosening frozen and compaction of bulk soil, and can be used, for example, in mining, metallurgical industry and building and construction.

Known devices of similar purpose, for example the device as. SU 1476066 A1, including the case with the working and discharge chambers, and the firing pin with the piston and rod is installed with the possibility of axial movement coaxial stepped valve. The disadvantage of this device is the imperfection of the design speed of the valve system throttle openings, causing significant hydraulic losses, which reduces the efficiency of the device.

It is also known device patent RU 2083764, comprising a housing with a TV head, plum, platoon, unloading and management, and the firing pin with the piston, the upper and lower rods and a groove on the upper shaft, differential coaxial valve with greater and lesser degrees, forming a chamber platoon, stroke, plum and control.

The disadvantage of this device, first, is that to control the operation of the device on the striker made a groove, which reduces the strength of such heavily loaded parts like head, and, secondly, Bo is in this case does not characteristic for him the function of the valve, so even a small wear of the surfaces of the firing pin and the guide leads to malfunction of the device. At the same time, this wear does not affect performance very brisk.

The closest in technical essence of the present invention is the device according to patent RU 2011817 (ES 3/20), which is selected as a prototype. Famous percussion device includes a housing, the bore of which is installed coaxially manual valve and drummer with the piston forming a storage, an overflow cavity communicated with the drain line drain cavity pressure and wzwodow cavity communicated with the pressure line. The body is made circular hole of a diameter equal to the outside diameter of the shank of the manual valve for periodically placing the latter in said bore, the wall of the shank stepped valve made of throttle opening for a permanent communication between the overflow and drain cavities, and the diameter of the shank of the striker from vsodaxes cavity exceeds the diameter of the shank of the striker from the storage cavity and these diameters are in the ratio

where D1the diameter of the front of the drummer, m;

D2the diameter of the rear part of the striker, m;

Qus - performance pump, m3/s;

E - impact energy, j;

m is the mass of the missile kg

The disadvantages of the known device is the low volumetric efficiency, especially at high operating frequency.

The reason is that during the stroke through the valve to the drain line reported not only usvajawa cavity, but also the source of working fluid. In a result, more than 30% of the fluid flows into the drain tank without performing useful work.

Another drawback is the additional overhead of energy due to increased hydraulic resistance of the valve only when the switching valve at the end of the stroke. In the same period of idling of the drummer, the longest time, this resistance causes only additional energy costs.

In addition, the device has the effect of changing the supply pressure source, the accuracy of the throttle holes.

Thus, the disadvantages of the known devices are of low efficiency and poor reliability.

The problem to which the invention is directed is to improve efficiency and enhance reliability of the device.

The essence of the invention is that in contrast to the known devices percussion, terasawa case with located inside a coaxial cylindrical sleeve, the lower end rigidly attached to the lower end wall of the housing, in the axial bore of which is movable along its axis installed in conjunction with housing forming wzwodow, overflow, drain and gas cavity, the striker piston protrusion in the middle part, constantly paired with the inner lateral surface of the sleeve and covering the firing pin and the sleeve, coaxial annular stepped valve, the steps of which the diameter decreases from the bottom up from the working end of the striker to its shank, according to the invention mentioned valve has four steps on the outside and three steps on the inner lateral surfaces, the valve on the side surface of the lowest top speed constantly connected with the casing and provided with an annular groove located between the two upper outer steps and together with the housing forming an annular channel, informing wzwodow cavity with the pressure line in the extreme lower position, in which the lower end of the smaller step of the inner surface is in contact with the free end of the sleeve, paired with her through the side of the average size of the domestic stage, while the largest size of the internal degree of the valve together with the sleeve forms a given size of the annular gap, which wzwodow cavity device the VA reports with insulated cavity, formed between the sleeve and valve and connected with the said annular channel radial holes in the side wall of the highest degree of the valve.

In addition, in its extreme upper position of the valve the upper end of the lowest top speed is in contact with the housing, and the second upper and greatest lower stage outer surface associated with the housing, closing thus the annular channel and thereby isolating wzwodow cavity from the pressure line. Between the surfaces of the sleeve and valve drain is formed an annular channel connecting wzwodow cavity with overflow and drain cavities of the device.

However, at the end of the sleeve in contact with the valve, is made narrow sealing band, proterty to the surface of the valve.

In addition, in the gas cavity of the device has a piston accumulator, the gas passage which is communicated with a gas cavity of the device, and liquid from the discharge line.

In addition, the device comes with a second accumulator piston chamber which is communicated with a channel from the building cavity, and its rod cavity with a pressure line and the

where Fi is the area of the piston cavity;

F - area of the rod end.

The technical result that can be obtained IP is the use of the invention, is to improve the efficiency and reliability of the device.

The invention is illustrated by drawings.

Figure 1 shows the schematic diagram of the device. Figure 2 - position of the valve during idling. Figure 3 - valve position during the stroke.

The percussion device includes a housing 1, in the guide rails 2 and 3 which is movably installed drummer 4 piston 5 (lip) in the middle part. The piston 5 of its cylindrical surface in contact with the inner surface of the cylindrical sleeve 6, which is located coaxially inside the housing 1. The internal cavity of the sleeve 6 by means of the piston 5 in the form of a protrusion is divided into lower (in the drawing), wzwodow 7, and the upper, overflow 8, cavity.

Usvajawa cavity 7 through radial holes 9 in the wall of the sleeve 6 is communicated with an intermediate cavity 10 formed by the inner surface of the housing 1 and the outer surface of the sleeve 6.

In the upper part of the housing 1 is located a gas cavity 11 is filled with compressed gas.

In the cylindrical bore of the housing 1 between the sleeve 6 and the gas cavity 11 with the possibility of longitudinal displacement of the installed ring manual valve 12.

The valve 12 from the outside has two notches 13 and 14, between which is made annular groove 15. The diameter of the stage 14 is slightly larger than the diameter of the stage 13. The lower end of Klah is Ana 12 is equipped with an annular projection 16 with the groove 17 and grooves 18. On the inner surface of the valve bottom there are two steps 19 and 20 for interfacing with steps 21 and 22 of the sleeve 6 (Fig 3). The diameters 19, 21 of the valve sleeve 12 6 essentially equal, and the diameter of the tread 20 of the valve slightly larger than the diameter of the tread 22 of the sleeve 6. On the upper side of the tread 21 of the sleeve is located a sealing band 23 with a diameter of 1-2 mm larger than the diameter of the guide stage 14 of the valve 12. In the side wall of the valve are radial holes 24, informing the groove 17 with the inner bore of the valve.

Between the inner surface of the valve 12 and the surface of the striker 4 has a circular slot 25, through which the overflow chamber 8 communicates with the bore 26 of the housing 1, which is a drain line 27 is communicated with the drain tank 28. In addition, the housing 1 opposite the annular groove 15 of the valve 12 has a bore 29, which channels 30 and 31 is communicated with the pressure source 32 and hydraulic cavity of the battery 33, having a stepped piston 34. Piston chamber 35 of the hydraulic accumulator is in communication with the gas cavity 11 of the device. Thus the ratio of the areas of the liquid cavity to the gas accumulator 2-3 times less than the ratio of the area of the piston 5 of the striker 2 to the sectional area of its upper end, the incoming gas in the cavity 11.

In addition, the intermediate cavity 10 with a channel 36 is in communication with the piston on the awn 35 hydraulic accumulator 37, his rod cavity 38 channel 39 communicates with the pressure source 32. The area of the piston cavity 35 of the battery 37 in 10-12 times the square of its rod end 38.

The percussion device operates as follows.

Before working gas cavity 11 is filled with compressed gas under pressure corresponding to a given impact energy. In the initial state, the striker 4 is at the bottom (drawing) position, drawing the lower end of a tool (not shown) or the piston 5 in the lower end wall vsodaxes 7 cavity. The valve 12 is in the down position, as shown in figure 2.

When the device is switched on in the work of the working fluid from the pressure source through the channel 30, the bore 29, the gap between the inner surface of the housing 1 and the annular groove 15, the slots 18, through the annular groove 17 and the gap between the inner surface of the housing 1 and the annular projection 16 comes in intermediate 10, and through the radial holes 9 and in wzwodow 7 cavity.

From vsodaxes cavity through the channel 36, the fluid enters the piston cavity 35 of the accumulator 37. In the first place is filling the piston cavity 35, and the accumulator piston 37 is moved to its extreme upper position.

When the pressure in vsodaxes cavity 7 drummer 4 begins to move upward (in the drawing) overcoming power resistance equal to the product of the gas pressure in the cavity 11 in the cross-sectional area of the end of the striker, the incoming gas in the cavity 11.

At first drummer 4 moves uniformly accelerated. Its speed increases from "0" to a certain value.

When the speed of the striker less than the value of,

where Qusthe flow from the pressure source 32,

Fp- working area 5 pin,

of the fluid from the pressure source, in addition to vsodaxes cavity 7 through the channel 31 will flow into the rod cavity 33 of the accumulator pajarera it.

When the drummer speedsis the battery. The liquid in wzwodow cavity 7 will flow from the pressure source 32, and a hydraulic accumulator.

After discharging the battery, the speed of movement of the striker will be constant and equal to.

The valve 12 at this point, the force directed downward (in the direction of the tool) and is equal to

PCL=PW(D52-D32),

where RWthe fluid pressure in the pressure line;

D5- diameter step 19;

D3- diameter step 13.

With this force the valve 12 is pressed against the sealing belt 23, providing isolation vsodaxes cavity 7 from the tray 8 and the drain line 27.

At the end of its upward movement the piston 5 of the striker 4, in contact with the end face of the valve 12, drags it up. When this occurs, the overlap of the slits a and B and simultaneously form a gap D (Fig 3). As a result, the intermediate 10 and communicated with her usvajawa 7 cavity becomes disconnected from the pressure line, and through the gap D and join the overflow cavity 8 and the drain line 27.

In these cavities installed pressure drain, close to zero. At this point, the striker 4 is valid only pressure gas from the cavity 11. Under the force of gas pressure the striker 4 is retarded, going 2-3 mm, and then begins to move downward in the direction of the tool, making the stroke.

When working stroke of the striker working fluid from vsodaxes cavity 7 through the radial holes 9 enters the intermediate 10, then through slit b and D in the overflow cavity 8. The valve 12 after plugging the gaps a and B together with drummer 4 will move in the direction of the gas cavity 2-3 mm.

After the discovery of cracks On the valve 12 will operate two oppositely directed forces: one from the gas cavity is equal to the product of the pressure of the working fluid in the pressure line on the difference of the squares of the stages 14 and 13 of the valve 12, and the other side of the tool is equal to the product of the differential pressure of the fluid at the gap at square the end of the valve 12.

The pressure drop at the gap In proportional to the square of the fluid velocity in the gap, which in turn is determined by the fluid flow through the gap. The fluid flow through the gap is defined as the product of the speed of the striker 4 in the area of the piston 5.

In the first moment of the stroke of the striker 4 speed is small, and therefore the pressure drop is small and insufficient to hold the valve 12 in its rear position. Introduction hydraulic accumulator 37 allows to eliminate this drawback, because immediately after opening the valve 12, i.e. after the formation of the slit D is the discharge of the accumulator 37 and front slit In maintain the required differential pressure fluid retention or even move the valve 12 up - and-gas cavity 11.

By increasing the speed of the striker 4 is a proportional increase in the flow of liquid through the gap, and hence the pressure drop before the slit, under which the valve 12 is moved upward, forming a gap, because the force acting on the valve from the gas cavity is equal to the product of the fluid pressure in the pressure line on the difference of the squares of the stages 14 and 13, remains almost constant, and the differential fluid pressure before the valve from the side of the tool will be maintained constant by the automatic regulation of the gap, the greater the velocity UD is rnica 4, the greater width of the slit.

During the stroke of the striker 4 all the working fluid from the pressure source 32 flows through the channels 30 and 31 into the cavity 33 of the hydraulic accumulator. When the piston 34 of the hydraulic accumulator is moved into the gas cavity 11, thus reducing its volume. This reduction to some extent compensates for the increase in the volume of the cavity 11 through the output end of the striker 4 from the gas cavity during the stroke.

In the result, the volume of the gas cavity varies much less than in the case when a gas chamber of the accumulator would be isolated from the gas cavity 11. The gas pressure and the fluid pressure in this case, during the entire cycle will vary considerably smaller range, which is beneficial to the operation and reliability of the device.

At the end of the stroke or the drummer 4 strikes the tool, or the piston 5 is in the brake chamber. The result is inhibition of the firing pin and the stop.

To stop the striker 4 stops fluid flow through the gap G, so disappears the pressure drop across the slit. Thus, the valve 12 will operate only one force directed downward in the direction of the tool, under the action of which the valve is moved downwards in the sealing band 23. When this overlap slit D and G (2) and open the slit And the B. Thus, there is a switching valve 12, in which the intermediate 10 and usvajawa 7 cavity again communicated with the pressure line, which included the pressure source 32 and the hydraulic accumulator.

Starts idling. At the same time, wzwodow cavity 7 will receive the working fluid not only from the pressure source, and stored in the accumulator during the stroke.

Fluid pressure in vsodaxes cavity will be determined by the hydraulic accumulator. Until the discharge of the hydraulic accumulator drummer 4 will move rapidly and reached the maximum speed of the platoon, its speed is constant and equal to,

ie will be determined by the flow from the pressure source.

Next cycle of operation of the device is repeated.

Thus, thanks to the present invention, the frequency of strikes increases to maximum efficiency increases up to 80%, and with the introduction of a small hydraulic accumulator in vsodaxes cavity substantially increases the reliability of the switching valve and, in General, increases the reliability of the device.

1. The percussion device comprising a housing located inside a coaxial cylindrical sleeve, the lower end rigidly attached to the lower end wall of the housing, in the axial bore of which the concentration is about along its axis installed in conjunction with housing forming wzwodow, on overflow, drain and gas cavity, the striker piston protrusion in the middle part, constantly paired with the inner lateral surface of the sleeve and covering the firing pin and the sleeve, coaxial annular stepped valve, the steps of which the diameter decreases from the bottom up from the working end of the striker to its shank, characterized in that the said valve has four steps on the outside and three steps on the inner lateral surfaces, the valve on the side surface of the lowest top speed is continuously connected with the casing and provided with an annular groove located between the two upper outer steps and together with the housing forming an annular channel, reporting wzwodow cavity with the pressure line in the extreme lower position, in which the lower end of the smaller step of the inner surface is in contact with the free end of the sleeve, paired with her through the side of the average size of the domestic stage, while the largest size of the internal degree of the valve together with the sleeve forms a given size of the annular gap, which wzwodow cavity device reports with insulated cavity formed between the sleeve and valve and connected with the said annular channel radial holes in the side wall most the degree of the valve.

2. The percussion device according to claim 1, characterized in that in its extreme upper position of the valve the upper end of the lowest top speed is in contact with the housing, and the second upper and greatest lower stage outer surface associated with the housing, closing thus the annular channel and thereby isolating wzwodow cavity from the pressure line, between the surfaces of the sleeve and valve drain is formed an annular channel connecting wzwodow cavity with overflow and drain cavities of the device.

3. The percussion device according to claim 1 or 2, characterized in that at the end of the sleeve in contact with the valve, is made narrow sealing band, proterty to the surface of the valve.

4. The percussion device according to claim 1, characterized in that the gas in the cavity of the device has a piston accumulator, the gas passage which is communicated with a gas cavity of the device, and liquid from the discharge line.

5. The percussion device according to claim 4, characterized in that the device has a second accumulator piston chamber which is communicated with a channel from the building cavity, and its rod cavity with a pressure line and the

where Fi is the area of the piston cavity;

F - area of the rod end.



 

Same patents:

Percussion device // 2325524

FIELD: mining industry.

SUBSTANCE: said invention relates to mining industry, in particular, to devices for percussion disintegration of high-strength rock and similar materials and may be used to disintegrate rock, concrete, as well as for frozen soil ripping and filling ground compacting. Engineering problem is to improve efficiency and reliability of the percussion device. The percussion device incorporates a body with non-stationary axial knocker and a co-axial percussion tool (a rod). The bottom three-step end of the body, step size increasing in the knocker travel direction, is encircled with partially axially mobile sleeve. In the recess of the sleeve solid bottom facing the surface of the material being processed, the tool shank is secured stationary, while the sleeve inner side surface is interfaced with corresponding surfaces of the smallest upper and the largest lower steps of the body. The inner cavity of the sleeve is filled with liquid and has a cross baffle, which contacts the body bottom end in the uppermost position of the sleeve. The baffle divides the said sleeve cavity into axial top and bottom chambers, interconnected by means of a coaxial opening in the baffle; diameter of the opening is similar to the one of the knocker. At the end of the working stroke, the bottom end of the knocker enters the bottom chamber through the opening near the uppermost position of the sleeve. On the top chamber side surface, there is a coaxial collar, which encircles the smallest step of the body near the uppermost position of the sleeve and forms a wide annular slot, while near the lowermost position of the sleeve it is interfaced with the side surface of the middle step of the body, so that they together form an isolated annular space interconnected with the sleeve cavity via a narrow ring slot.

EFFECT: improved durability and reliability of the percussion device.

3 cl, 1 dwg

FIELD: mining.

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EFFECT: enhancement of reliability, design simplicity and economic feasibility of the device.

2 cl, 5 dwg

FIELD: mining, particularly well drilling methods and devices, namely drilling by use of heat, flame drilling.

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EFFECT: increased productivity and drilling efficiency, as well as extended technological capabilities.

2 cl, 32 dwg

FIELD: tunnel construction, particularly devices to construct hydroelectric power plant floodgates and to build motor roads and rail roads in mountains.

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EFFECT: increased drilling efficiency due to increased operational drilling tool reliability.

3 cl, 6 dwg, 1 tbl

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5 cl, 1 dwg

FIELD: mining, particularly well drilling by use of heat, for example, flame drilling.

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EFFECT: improved capacity and operational efficiency.

2 cl, 15 dwg

FIELD: construction and geology, particularly to break natural and artificial scale and deposits and to drill holes.

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EFFECT: increased cavitational jet power.

5 cl, 4 dwg

Electric hammer // 2315181

FIELD: construction industry, particularly to drive heavy reinforced concrete and metal shelled concrete piles during ice-resistant fixed platform, including underwater one, construction.

SUBSTANCE: electric hammer comprises body with three-phase winding of linear induction motor stator adapted to receive reciprocating hollow striking armature installed therein in fluid-tight manner. The striking armature is monolithic in lower part and includes short-circuited current-conducting winding formed from outer surface thereof. Hammer comprises anvil block with damping means. Linear induction motor stator winding is installed in upper part of cylindrical electric hammer body, which is provided with tubular striking armature position sensors. Cylindrical body of electric hammer is installed inside cylindrical sealed shell so that lower and upper chambers are created. Chamber lengths are equal to cylindrical body length and striking armature travel correspondingly. The upper and lower chambers are freely connected with each other. Upper chamber is communicated with striking armature interior. Lower chamber has pipeline with check valve. Lower chamber and striking armature interiors are partly filled with heat-conductive and electrical insulation liquid. Remainder zones of lower chamber, striking armature interior and total upper chamber are filled with high-pressure heat-conductive gas. Lower chamber has protective safety valve. Vacuum chamber is created between lower monolithic striking armature part and anvil block. Damping means is installed in lower monolithic part of cylindrical electrical hammer body in fluid-tight manner and may reciprocate relatively the body. Cylindrical fluid-tight shell has additional weight. Short-circuited current-conducting winding of linear induction motor stator is linked to frequency-regulated power supply and control system.

EFFECT: increased operational reliability.

1 dwg

FIELD: mining, particularly for mine excavation, well drilling, ore preparation, in geophysics for deposit exploration and probing.

SUBSTANCE: method involves applying pulsed electromagnetic field and elastic stress waves to rock, wherein rock is simultaneously treated with pulsed magnetic field having induction of 0.25-1.5 T, pulse duration of 100-300 microseconds and 1·10-2 - 5·108 Hz frequency, and elastic stress wave. As elastic compression stress waves act on rock magnetic field is created by positive current pulse half-waves. As elastic extension stress waves act on rock magnetic field is created by negative current pulse half-waves. As electric rock resistance decreases up to electric resistance of conductive and semiconductive minerals forming said rock electric current is passed through rock along with following magnetic field induction vector change to provide total rock loosening in treated zone. Magnetic field induction vector is directed orthogonally to elastic stress wave propagation and then the cycle is repeated.

EFFECT: increased degree of crystalline rock weakening due to destruction thereof, inter-crystalline bounds weakening along with decreased power inputs and material consumption.

1 dwg

FIELD: bulkheads, piles, or other structural elements specially adapted to foundation engineering, particularly frozen ground development with the use of screw-and-wedge working tools.

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EFFECT: simplified screw working tool tip driving in frozen ground.

2 dwg

FIELD: mining and construction, particularly to excavate frozen ground massifs by massif cutting into several parts before ground excavation.

SUBSTANCE: method for ground cutting with the use of end-mill type cutter involves installing end-mill type cutter on basic machine so that the cutter is inclined with respect thereto and cutting ground with front cutter part as pendular oscillations symmetric with respect to basic machine axis are transmitted to the cutter. Cutting part of the cutter is made as separate teeth and thermal burners arranged in-between. The thermal burners include serially connected outer nozzles, combustion chambers and outlet valves. Previously prepared mixture including compressed gas and air is supplied to the burners via pipeline.

EFFECT: increased efficiency, possibility to cut frozen ground for necessary depth.

1 dwg

FIELD: mining, particularly permafrost rock thawing for permafrost gravel deposit mining.

SUBSTANCE: method involves removing land cover from permafrost zone to be thawed; forming supply, drain and irrigational ditches; supplying water heated up to +50 ÷ +60°C into supply and irrigational ditches. Water is heated by solar energy accumulation in salt solar water heaters installed on supply and irrigational ditch bottoms.

EFFECT: increased speed and efficiency of permafrost rock thawing.

3 cl, 3 dwg

FIELD: mining and building, particularly frozen rock thawing for deposit development.

SUBSTANCE: method involves removing soil cover from area to be thawed; erecting water-retaining dam; filling the area with water and draining water out of area bounds. Well rows are drilled in the area and spillaway pipe is laid between the wells. One end of spillaway pipe is closed with cap. Another end thereof is provided with gate valve and drain pipe. Water intake pipes are installed in wells and connected to spillaway pipe. The water intake pipes have sections provided with perforated orifices of 0.01-0.02 m diameters. Above water intake pipe sections have lengths of 0.5-1.0 m.

EFFECT: increased efficiency.

2 cl, 1 dwg

FIELD: building, particularly for ground loosening and cement-concrete covering cracking during motor road and pavement reconstruction.

SUBSTANCE: loosening device comprises frame with rotation bearings, shaft with drum supported by rotation bearings, shaft drive and dynamic action application mechanism. The drum is provided with teeth. The dynamic action application mechanism applies dynamic action to the drum. The drum is connected to the shaft through free travel mechanism. The dynamic action application mechanism is made as ratchet wheel fixed to drum end and connected with impact application mechanism, which applies impact action to drum, through rod. The impact application mechanism is made as hydraulic hammer.

EFFECT: increased operational efficiency.

2 cl, 2 dwg

FIELD: mining, particularly earth-moving machine used for open-cast mining of minerals included in solid enclosing rock and for slice mining.

SUBSTANCE: device comprises basic machine, basic machine frame hingely connected with rotary executive tool frame and rear support frame for executive tool. The executive tool has conveyer. Device includes additional hydraulic pump having independent power drive and active mechanical ripper. Active ripper teeth are spaced one from another along the full rotary executive tool cutting width and are provided with high-frequency hammers with hydraulic striker activation system. The strikers are activated by additional hydraulic pump. The teeth may be displaced in vertical plane.

EFFECT: extended field of continuous mining technology application and increased intensity of mining works lowering.

2 dwg

FIELD: mining, particularly dredgers or soil-shifting machines used for open mining of bedded deposits having low dip angles and characterized by solid surrounding rock.

SUBSTANCE: mining-and-hauling device comprises basic chassis with blade, gas turbine engine, gas pipeline having variable cross-section with injector nozzle and loading opening. The device is provided with rotor thrower and active mechanical ripper. Active mechanical ripper teeth are spaced apart along the full working zone of the blade and provided with air hammers. Compressed air is supplied to air hammers from high-pressure compressor of gas turbine engine. Gas turbine engine has two shafts and is adapted to drive rotor thrower by free engine shaft.

EFFECT: reduced specific power inputs for solid rock cutting and extended field of application of continuous deposit development technology.

2 dwg

FIELD: mining and building, particularly thawing frozen rock and ground, preferably for frozen placer deposit development.

SUBSTANCE: method involves removing soil-vegetable layer from field to be thawed; flooding the field to be thawed with liquid, which is selectively transparent for short-wave and long-wave radiations and applying oil film. The field is flooded in several layers. The selectively transparent liquid is aqueous solution of industrial magnesium salt 6H2O·MgCl2, wherein industrial magnesium salt concentration reduces from lower liquid layers to upper ones.

EFFECT: increased thawing rate.

2 cl, 1 dwg

FIELD: mining and building, particularly devices to apply gas-dynamic action to ground to loosen thereof during building work performing.

SUBSTANCE: device comprises load-bearing frame with vertical guiding shafts and having orifice for gas-dynamic annular blade passage through the frame. The gas-dynamic annular blade is coaxial to central gas-dynamic ripper. The ripper comprises hollow rod body kinematically connected with discharge bush having exhaust orifices and screw tip body kinematically connected with discharge bush and coaxial thereto. Working chamber with hollow shank of central gas-dynamic ripper is coaxially fastened to rod body. The hollow shank is kinematically linked to drive mechanism and may rotate in opposite direction when gas-dynamic annular blade shank is installed in stepped orifice of stepped body of gas-dynamic unit connected with power source through valves to control pressurized gas supply and through compressed gas supply pipelines. The hollow shank is also connected with vertical guiding shafts by holders and sliding bushes. The gas-dynamic annular blade is composed of separate segmented parts having flange areas and cutting blades kinematically connected with tubular rod bodies, coaxially arranged between them along concentric circuit in top-down direction, with discharge bushes having exhaust orifices and with cutting tip bodies. Gas-dynamic annular blade shank is provided with annular groove, radial channels, longitudinal annular channel to supply compressed gas to common annular chamber of gas-dynamic annular blade defined by lower and upper flanges connected one to another by common hub created at gas-dynamic annular blade shank, and connection pipe installed on upper and lower flanges of gas-dynamic annular blade shank. Central orifice for rotary central gas-dynamic ripper shank installation is formed in the hub. Lower flange has concentric orifices for upper parts of tubular rod bodies of gas-dynamic annular blade rippers receiving. One radial channel created in stepped body wall having larger diameter is communicated with pressurized gas supply pipeline through compressed gas supply control valve. The radial channel is communicated with common annular chamber of gas-dynamic annular blade through annular groove, radial channels and longitudinal annular channel. The common annular chamber of gas-dynamic annular blade is connected with annular gaps defined between rod bodies of gas-dynamic annular blade rippers and supply bushes installed along longitudinal axis in common annular chamber of gas-dynamic annular blade, in cavities formed in rod bodies of gas-dynamic annular blade rippers, in valves and valve control cavities. Another radial channel formed in stepped body wall having larger diameter is communicated with compressed gas supply pipeline through compressed gas supply control valve and with longitudinal concentric channels of gas-dynamic annular blade shank through annular grove. Above radial channel is connected with valve control cavities through jets linked to longitudinal channels and supply pipes and through supply pipes to communicate annular gaps between rod bodies and supply pipes with exhaust orifices in discharge bushes of gas-dynamic annular blade rippers. Ground to be loosened is subjected to simultaneous action of five gas pulses generated by four gas-dynamic annular blade rippers and by central gas-dynamic ripper.

EFFECT: increased capacity and uniformity of ground cutting into fractions due to gas pulse application to the ground.

3 cl, 11 dwg

FIELD: building, particularly for layer-by-layer loosening firm grounds and for removing ice and snow from motor roads and pavements.

SUBSTANCE: device comprises frame and shaft secured in rotary supports and installed on the frame. Device has shaft rotation drive, drum with teeth rotary installed on the shaft. Drum hub carries toothed wheels with unbalancing means engaging toothed wheel installed on shaft in rotary supports. Toothed wheels are connected to the drum by rotary supports. Device has toothed wheel drive and resilient members made as flat spring. One spring end is connected to the shaft, another one is secured to drum sidewall.

EFFECT: increased reliability.

2 cl, 3 dwg

FIELD: building, particularly for layer-by-layer loosening firm grounds and for removing ice and snow from motor roads and pavements.

SUBSTANCE: device comprises frame and shaft secured in rotary supports and installed on the frame. Device has shaft rotation drive, drum with teeth rotary installed on the shaft. Drum hub carries toothed wheels with unbalancing means engaging toothed wheel installed on shaft in rotary supports. Toothed wheels are connected to the drum by rotary supports. Device has toothed wheel drive and resilient members made as flat spring. One spring end is connected to the shaft, another one is secured to drum sidewall.

EFFECT: increased reliability.

2 cl, 3 dwg

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