Control device for cutting tool drive in front plant

FIELD: mining, particularly remote control specially adapted for machines for slitting or completely freeing the mineral.

SUBSTANCE: device comprises the first, the second and the third asynchronous motors. The first and the second electric drives are connected to drive sprocket of closed pull chain provided with plough carriages, which may move along guiding means. Device also has hydraulic cylinders to move guiding means to face, mechanical gear, the first and the second safety hydraulic valves, the first and the second hydraulic pumps, the first and the second frequency converters, the first and the second frequency regulators, load sensors, load balancing unit, load regulator, load assignment unit, control unit, initial setting signaling unit, hydraulic distribution means, which control hydraulic cylinders to move guiding means to face, hydraulic units, electrohydraulic unit, channel switching unit, flow meter, excavated seam thickness setting unit, breakage face length setting unit, multiplication unit, divider, optimizing peak-holding controller, control signal generation unit, asynchronous single-phase motor and screw gear made as a nut and screw. The first and the second hydraulic pumps include volume regulation means.

EFFECT: reduced specific energy consumption along with increased front plant output.

1 dwg

 

The invention relates to the mining industry, namely, means of mechanization of extraction of natural resources and can be used in the system of automatic regulation and control electrohydroblock Executive body of the front of the unit.

A device control dvuhdvigatelnogo electric supply of the Executive body of the Shearer is placed on the guide with the possibility of translational movement by means of endless conveyor chain /Babakin GI, Shytsky VI, Serov I. /Frequency-adjustable electric drive mining machines and installations" N.: Publishing center RTUD, s-146, RIS/.

The drive contains two asynchronous electric motor, the rotors of which through the gears and sprockets are connected with a traction chain can move the Executive body of the guide.

The control device includes first and second frequency converters, frequency regulators, gauges, load block load balancing of the first and second motors, a unit of frequency of rotation. The inputs of the inverters connected to the power network, and outputs respectively to the windings of the stators of the first and second motors. To the inputs of frequency converters connected to the outputs of frequency regulators. To the outputs of the first and second converted is of Atala frequency connected load sensors, the outputs are connected to two inputs of the block load balancing, and the two outputs of this block are connected with regulators frequency. The output of block frequency associated with the frequency regulators.

The disadvantage of this device is that when changing the feed speed of the Executive body of the guide and constant surface speed change cutting depth h, and the step of cutting t - the distance between adjacent lines of cut remains unchanged. Therefore, the ratio t/h when adjusting the feeding speed is changed in a wide range. At low and high values of t/h energy costs Executive body increase compared with a minimum value at the optimum ratio t/h. Thus, the object has an extreme characteristic dependence of specific power consumption from the values of t/h, but the known device does not provide the optimal values of t/h. In addition, the device does not exclude the possibility of increasing the resistance to the motion of the Executive body of the guide due to its bending in the plane of the layer and the associated additional costs of energy.

Closest to the present invention is a device for controlling the drive of the Executive body front Assembly /RF Patent №2246615, IPC7E 21 35/24, E 21 D 9/093, BI No. 5 from 20.02.2005,

The drive contains three asynchronous motor, and the first and second electric motors connected through a gear drive sprocket endless conveyor chain equipped strahovymi carriages can move them by rail, hydraulic cylinders move the rail on the bottom, the first and second hydraulic pumps with permanent workers volumes connected through a mechanical transmission with the third motor, and their outputs connected pressure relief hydraulic valve.

The control device includes first and second inverters whose inputs are connected to the power network. The output of the first frequency Converter connected with the first motor, the output of the second inverter with the second and third motors. To the inputs of inverters connected outputs and the second frequency regulators. To the outputs of the inverters connected to the load sensors, the outputs of which are connected with a power balancing, two outputs which are connected to the inputs of the first frequency controller.

With the inputs of the first and second regulators frequency associated regulator output load, the input of which is connected to the block task load and the second load cell.

The first and second outputs of each of the valve control associated with the corresponding g is gracilentum travel guide to the slaughter, and the third and fourth outputs from the hydraulic unit. One of the inputs of valve control is connected with the drain hydrologically, and the other with pressure hydrologically connected to the output of the first hydraulic pump. The output of the second hydraulic pump is connected with electro-hydraulic unit, comprising two two-position valve with four electromagnets control associated with the four outputs of the control unit. A control unit connected with the output of the second inverter and the block signal initial setup. Two outputs of the electromagnetic unit are connected with hose control, which are connected with inputs of each of the hydraulic unit.

Automatically maintain a given load level with simultaneous alignment of two electric motors increases the use of the installed capacity of the drive and performance of the front of the unit. The device also supports maintaining the straightness of the guide for the movement of the plow carriage, which further leads to the reduction of energy consumption.

Related change of frequency of rotation of all three motors provides a proportional change in speed the plow carriage along the guide /cutting speed and feed speed rail on the bottom. Thanks to podderjivaetsa consistency relations t/h and reduced energy costs.

However, when a constant step of cutting, as is the case for the Executive body of the front of the unit, the optimum cutting depth is not constant. Its value depends on a number of factors and primarily on the physical-mechanical properties of the mineral, which change significantly as the length of the stope, and the mining of the pillar. Therefore, minimizing the unit cost of energy can only be achieved when regulating and maintaining optimal values of t/h in the process of work of the Executive body due to changes in a certain range of depth of cut. The inability to control the relationship t/h is a disadvantage of the known device, which reduces the performance of the front of the unit.

The task of the invention is to minimize the unit cost of energy of the Executive authority while increasing the productivity front of the unit.

The essence of this invention lies in the fact that it is provided with a unit change channels, flow meter, the unit job removing capacity of the reservoir, the unit set the length of the stope, the unit of the multiplication, unit, extreme regulator block form the control signal, the asynchronous single-phase motor, helical gear in the form of a screw and nut is, moreover, the first and second volumetric pumps include mechanisms regulating their business volumes, the first input channel is connected to the regulator output load, and the first output is connected with the first inputs of the first of the second frequency regulators, the flow meter is included in the pressure hydrological, its output connected to the first input of block multiplication, second and third inputs of which are connected respectively with the output of block job removing capacity of the reservoir and the output unit set the length of the stope, the output of block multiplication connected with the first input unit, the second input is from the output of the second load sensor, the output unit is connected to the first input of extreme controller, a second input connected to the output processing unit control signal, the extreme output of the regulator is connected to the second input channel, the second output of which is connected to the winding of single-phase induction motor, the rotor of which is connected by screws with a screw gear nut which is connected to the inputs of the regulatory mechanisms of displacements of the first and second hydraulic pumps.

The drawing shows a diagram of the device for controlling the drive of the Executive body of the front of the unit.

Device drive control of the Executive body of frontal the second unit contains the first and second asynchronous motors 1 and 2, connected through gears 3 and 4 are driven by the sprockets 5 and 6, an endless traction chain 7, equipped strahovymi carriages 8, with the possibility of moving them along the guide 9.

With each section of the guide 9 are connected to the cylinders 10 move this guide at the bottom /on the scheme conditionally shows one cylinder/. The third induction motor 11 through a mechanical transmission 12 is connected with the first and second volumetric pumps 13 to 14, provided with mechanisms regulating their business volumes. To the outputs of the pumps 13 and 14 connected respectively pressure relief hydraulic valve 15 and 16.

Device drive control of the Executive body includes first and second frequency converters 17 and 18, the inputs of which are connected with an electric power network, and the outputs respectively from the windings of the stators of the motors 1 and 2. The frequency converters 17 and 18 are connected to control outputs of frequency regulators 19 and 20. To the outputs of the inverters 17 and 18 connected to the load sensors 21 and 22. The output of the second frequency Converter 18 on site before the input of the load sensor 22 is connected with the stator winding of the third electric motor 11. The output of the load sensor 22 is connected to the input of the regulator load 23, the second input is connected to the block task load 24. The controller output load 23 soy is inen with the first input switch unit channels 25, the first output of which is connected to the first input of frequency regulators 19 and 20.

The outputs of the load sensors 21 and 22 are connected to two inputs of the block alignment of the load 26, the first and second outputs of which are connected respectively with the third and second inputs of the inverter 19.

Piston and the rod end of each cylinder displacement 10 is connected with the first and second outputs of the control valves 27, the inputs of which are connected to the pump 28 and the drain 29 hydrologically. To the pressure supply lines 28 connected to the output of the first hydraulic pump 13.

The third and fourth outputs of each of the valve control 27 associated with the respective hydraulic unit 30, two other input of which is connected to the first and second hose control 31 and 32. To the first input of the electrohydraulic unit 33 is connected to the output of the second hydraulic pump 14, the second input of this block is connected with the drain hydroline 34. The outputs of the electro-hydraulic unit 33 are connected with hose control 31 and 32. The control unit 35 is connected to the output of the second frequency Converter 18, the second input is connected to the block signal initial setup 36, and the first, second, third and fourth inputs connected to respective inputs of an electrohydraulic unit 33.

The flow meter 37 is included in the pressure hydrological 28, and its output is connected to the first input unit 38 multiplication. The second and third inputs of block multiplication 38 are connected respectively with unit job removing capacity of the reservoir 39 and the block set the length of the stope 40. The output of block multiplication 38 associated with unit 41, a second input connected to the output of the load sensor 22.

The output unit 41 connected to the first input of extreme regulator 42, a second input connected to the processing unit of the control signal 43. The extreme output of the regulator 42 is connected with the second input of the switch unit of the channels 25, the second output of which is connected to the stator winding of single-phase induction motor 44. The rotor of the electric motor 44 is connected to the screw 45 helical gears 46 and nut 47 which is connected to the inputs of the regulatory mechanisms of displacements of the hydraulic pumps 13 and 14.

Device drive control of the Executive body works as follows.

The device regulates the two drive parameters: the load of the motors 1 and 2 and the unit cost of energy Executive body of the front of the unit. Therefore, the device has two control channel. To eliminate conflict situations, when the device is at the same time on each of the control channels is trying to convey two opposite signal to the hydraulic cylinders 10 travel guide 9 on the bottom,serves as the power switch of the channels 25. Unit 25 provides automatic periodic inclusion of the first channel while turning off the second channel, and Vice versa, and it is also possible regulation of the ratio of the duration of periods include the first and second control channels.

In the steady mode, the moving speed of the plow carriage 8 along the guide 9 /speed/ by means of endless conveyor chain 7 is determined by the frequency of rotation of the first and second motors 1 and 2, the gear ratio of the gears 3 and 4, and the radius of the sprockets 5 and 6.

The speed of the motors 1 and 2 is determined by the frequency of the alternating current supplied to the windings of the stators of these motors on frequency converters 17 and 18.

The feed speed of the guide 9 on the bottom is determined by the speed of extension rods 10 and depends on the volume of fluid flowing per unit time in the piston cavity of each cylinder 10 from the pressure supply lines 28 through the valve control 27 mounted in position A.

The flow of working fluid through pressure hydrological 28 is determined by the capacity of the first hydraulic pump 13, which depends on the displacement of the pump, the value of which is determined by the position adjustment mechanism displacement gear ratio mechanical is peredachi 12 and the rotational speed of the third motor 11. The rotational speed of the electric motor 11 is determined by the frequency of the alternating current flowing in the stator winding of the electric motor 11 from the second frequency Converter 18.

The resistance to movement of the lower and upper branches of the traction chain 7 with strahovymi carriages 8 may be different due to variable fortress of the mineral from the seam thickness. In this case the load /current/ motor 1 will be larger or smaller than the load /current motor 2. Signals proportional to the load of the motors 1 and 2 come from the load sensors 21 and 22 to the inputs of the block alignment of the load 26. If the current of the electric motor 2 will be more current of the motor 1, the output unit 26 associated with the third input of the frequency controller 19, a signal will appear with the sign "+", which will increase the supply frequency of the motor 1 as long as the currents of the motors 1 and 2 will be compared.

If the current of the motor 1 exceeds the current of the electric motor 2, the output unit 26 associated with the second input of the frequency controller 19, a signal will appear with "-"sign, which will lead to the reduction of the power of the motor 1 and the reduction of its current to the current value of the motor 2.

For filing guide 9 on the bottom of the control valves 27 are set in the position A. When this pressure hydrological 28 connecting the fast with the piston cavity of each cylinder move 10. To synchronize the speeds of the cylinders 10, is connected in parallel to the pressure supply lines 28, and ensure the straightness of the guide 9 in the plane of the layer, the rod cavity of each cylinder 10 through the control valve 27 is connected to the first input, and the drain hydrological 29 - with the second inlet of the hydraulic unit 30.

The control unit 35 generates the control pulses, the frequency of which is determined by the frequency of the alternating current output of the frequency Converter 18 and in a certain sequence distributes them to the four inputs of an electrohydraulic unit 33. Thus the output of the hydraulic pump 14 connected to the electro-hydraulic unit 33, in turn connects to the hose management 31 or 32, while the corresponding hydroline control 32 or 31 are connected with the drain hydroline 34. Under the action of the pulse pressure of the working fluid flowing alternately on the third or fourth inputs of the hydraulic unit 30, the latter carries out the dosing unit volume of working fluid displaced by one stroke of the rod end of the hydraulic cylinder 10 and into the drain hydrological 29.

The frequency of the control pulses in the moment for all hydraulic units 30 are identical, and a single volume displacement of the working liquid is constant, therefore, the moving speed of the rod Hydrolink 10 will be equal, regardless of the actual load amount. This ensures maintaining the straightness of the guide 9 in the plane of the layer.

If you modify the fortress mineral actual current of the motor 2, as measured by the load cell 22, will deviate from the predetermined current value is determined by the block set the load 24, the output of the regulator load 23 appears proportional to the signal received at the first input switch unit of the channels 25. If this input is connected to the first output of the switch unit of the channels 25, the signal at the first input of frequency regulators 19 and 20, which affect the frequency converters 17 and 18. Last reduce or increase the frequency of the alternating current supplied to the motor 1 in 2, and to the electric motor 11, which leads to a corresponding change in the rotational speed of these motors. As a result, in either direction changes the moving speed of the plow carriage 8 along the guide 9 /speed/. However, changing the speed of the pumps 13 and 14, as well as their performance. At the same time proportionally varies the frequency of the driving pulses to the electro-hydraulic unit 33 and the water is practical blocks 30. Eventually vary the amount of working fluid flowing through the pressure hydrological 28 in the piston cavity of each cylinder 10, and displacement of the hydraulic unit 30 in the drain hydrological 29. Accordingly, decreases or increases the speed of the feed rail 9 on the bottom. In the proportional change of cutting speed and feed can be reduced or increased load of the motors 1 and 2 to a specified level while maintaining the constancy of the relationship t/h, corresponding to the specified position of the regulatory mechanisms of displacements of the hydraulic pumps 13 and 14.

If you want simultaneously to turn off the flow guide 9 on the bottom, the block signal initial setup 36 signal, which output control unit 35 receives control signals to disable using electrohydraulic unit 33 of the hose control 31 and 32, and hence the hydraulic units 30. Draining the working fluid from the rod ends of the cylinders 10 in the case drain line 29 is stopped, and the piston stop. The pressure of the working fluid at the output of the hydraulic pumps 13 and 14 is limited due to the relief of the hydraulic valve 15 and 16, propuskayuschih working fluid to drain.

To enable supply voltage is alausa 9 on the bottom stop signal from block 36, and the control unit 35 starts generating control pulses for switching electrohydraulically block 33. Pressure relief hydraulic valve 15 and 16 are closed and the device drive control of the Executive body begins to function in the above sequence.

With long breaks in operation the valves 27 are set in a neutral position C. When the switching valves 27 in position a or D to turn on and reversal of hydraulic cylinders 10, for example, to periodically removing accumulated during operation of the front Assembly errors in the straightness of the guide 9 in the plane of the layer.

Disabling the first channel control unit channel 25 controls frequency 19 and 20 in conjunction with frequency converters 17 and 18 fixed frequency AC output of the last that took place to the turn off, so the electric motors 1, 2 and 11 rotate with a constant frequency.

Enabling a second channel control unit channel 25 finding optimal values of t/h, providing the minimum specific energy consumption of the Executive body of the front of the unit, as follows.

In block job removing capacity of the reservoir 39 and the block set the length of the stope 40 p is logicheskie as changes in these parameters are entered corresponding to the source data. Outputs of blocks 39 and 40 are proportional to the signals received at the inputs of block multiplication 38. From the output of the flow meter 37 to the input of block multiplication 38 receives the signal proportional to the actual speed of the feed rail 9 on the bottom. After multiplying the signal proportional to the performance of the Executive body per unit time, the output of block 38 to the input of the unit 41. To the other input of this block from the load sensor 22 receives the signal, proportional to the power consumed by the motor 2. Output unit 41, a signal is generated that is proportional to the private from the fission power of the motor 2 on the performance of the Executive body, i.e. the specific energy cost.

This signal is fed to the input of extreme regulator 42, to the second input of which unit 43 receives the control signal. In extreme regulator 42 is formed difference signal of the control signal and the signal proportional to the specific energy. Under the influence of this difference signal is formed of a search signal which after amplification is fed from the output of extreme regulator 42 to the second input of the switch unit of the channels 25. Since this input is connected to the second output of the switch unit of the channels 25, the search signal received at the input of the single-phase induction nm is the engine 44. The rotor of the electric motor 44 does alternating rotary motion transmitted to the screw 45 helical gears 46. In the nut 47 performs a reciprocating oscillatory motion, which is transmitted to the input associated with the nut 47 regulatory mechanisms of displacements of the hydraulic pumps 13 and 14.

Due to this, at a constant frequency of rotation of the electric motors 1, 2 and 11 and constant cutting speed oscillatory change the performance of hydraulic pumps 13 and 14 and the feed speed of the guide 9 on the bottom. Therefore, extreme regulator 42 provides the organization changes the relationship t/h thus, in order to find and keep a variable t/h at a working point corresponding to the extreme /the minimum/ the value of specific energy Executive body of the front of the unit.

After the expiry of the period of inclusion of the second channel control unit channel 25 includes a first control channel and disables single-phase motor 44 from the output of extreme regulator 42. With fixed position of the nut 47 helical gears 46 and mechanisms of displacements of the hydraulic pumps 13 and 14, as well as ensure that the set of optimal values of the relations t/h. The control unit further provides stabilization naked the narrow motors 1 and 2 control load 23 when the optimal value of t/h and minimum specific energy of the Executive authority during the period include the first channel.

For maximum performance the front of the unit duration enable the first control channel should be substantially longer than the length of the inclusion of the second control channel.

Thus, the proposed introduction of additional blocks and elements in combination with the change and the introduction of additional connections between the modules and elements of the device drive control of the Executive body minimizes energy costs due to periodic regulatory relations t/h and fixing its optimal value, which in combination with automatic stabilization of the load motor drive plow carriages simultaneously provides increased productivity front of the unit.

Device drive control of the Executive body front Assembly including first, second and third induction motors, and first and second electric motors through a gear connected with the driving sprocket endless conveyor chain equipped strahovymi carriages can be moved along the guide, the cylinders move the guide to the slaughter, mechanical transmission, the first and second pressure relief hydraulic valve, the first and second volumetric pumps connected through mechanical p is the transfer to the third motor, moreover, the inputs of the first and second pressure relief hydraulic valve connected respectively to the outputs of these pumps containing the first and second inverters whose inputs are connected to an electric power network, the output of the first frequency Converter connected to the stator winding of the first motor, a second frequency Converter connected with the windings of the stator of the second and third motors, the first and second control frequency, the outputs of which are connected to control inputs respectively of the first and second frequency converters, load cells, connected to the outputs of the first and second frequency converters, power leveling loads connected to the outputs of the load sensors, and the first and second outputs associated respectively with the third and second inputs of the first frequency regulator, the regulator load, the unit job load, and unit assignments load connected to the first input of the regulator load, its second input is connected with the output of the load cell of the second motor, the control unit, the block signal initial setup, and the first control unit is connected with the output of the second frequency Converter and the second input is connected to the block signal initial installation, the valves control the hydraulic cylinders move upravlaushiy on the bottom, hydraulic blocks, and the inputs of each of the valve control connected to the pump and drain hydrologically, pressure hydrological connected to the output of the first volume of the hydraulic pump, the first and second outputs of the valve control is connected with the piston rod and the cylinder cavities move, and the third and fourth outputs of the valve control is connected to the first and second inputs of each of the hydraulic unit, hydraulic unit, with its first input connected to the output of the second pump, the second input is connected with the drain hydroline, the first and second outputs connected to first and second hose management associated with the third and fourth outputs of each of the hydraulic unit, and the first, second, third and fourth outputs of the control unit are connected to the corresponding inputs of the electrohydraulic unit, characterized in that it is provided with a unit change channels, flow meter, the unit job removing capacity of the reservoir, the unit set the length of the stope, the unit of the multiplication, unit, extreme regulator block form the control signal, the asynchronous single-phase motor, helical gear in the form of a screw and nut, and the first and second volumetric pumps include mechanisms to regulate the Finance of their business volume, the first input channel is connected to the regulator output load, and the first output is connected with the first inputs of the first and second frequency regulators, the flow meter is included in the pressure hydrological, its output connected to the first input of block multiplication, second and third inputs of which are connected respectively with the output of block job removing capacity of the reservoir and the output unit set the length of the stope, the output of block multiplication connected with the first input unit, the second input is from the output of the second load sensor, the output unit is connected to the first input of extreme controller, a second input connected to the output of the shaping unit control signal, the extreme output of the regulator is connected to the second input channel, the second output of which is connected to the winding of single-phase induction motor, the rotor of which is connected by screws with a screw gear nut which is connected to the inputs of the regulatory mechanisms of displacements of the first and second hydraulic pumps.



 

Same patents:

FIELD: mining industry.

SUBSTANCE: device has two asynchronous electric engines, connected via reducers to drive sprockets of continuous traction chain, provided with plane carriages with their possible displacement along the guide, and hydraulic cylinders for displacing guide on pit-face. To windings of stators of first and second electric engines connected respectively are outputs of first and second frequency converters, inputs of which are connected to power grid and control inputs of which are connected respectively to outputs of first and second frequency adjusters. To frequency adjusters also connected are inputs of load detectors, to outputs of which load balancing block is connected, outputs of which are connected to inputs of first frequency adjuster. To inputs of both frequency adjusters output of load adjuster is connected, inputs of which are connected to load-setting block and load sensor for second engine. To output of second frequency converter connected are input of control block, other input of which is connected to signal block of base plant, and stator winding of third asynchronous engine, which via mechanical link is connected to first and second hydraulic pumps, having constant working volumes. Output of first hydraulic pump is connected to force hydro-main and input of second preventing hydraulic valve and to first inputs of two-position hydraulic distributors with electromagnetic control, to electromagnets of which outputs of control block are connected. Second inputs of two-positional hydraulic distributors with electromagnetic control are connected to control chambers of hydro-controlled two-positional hydro-distributors, which are part of hydro-blocks. Outputs of hydro-controlled two-positional distributors are connected to opposite hollows of volumetric dosing device of each hydro-block, and their inputs are connected respectively to outputs of hydro-distributors for controlling hydro-cylinder for moving the guide on pit-face, inputs of each of which are connected to force and drain hydro-mains, and outputs are connected to piston and rod hollows of appropriate hydro-cylinder.

EFFECT: higher efficiency.

1 dwg

The invention relates to the mining industry and can be used in the system of automatic control and drive control of the Executive body of the front of the unit

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Well drilling rig // 2265121

FIELD: mining industry, particularly for drilling exploratory and pressure-relief wells before mineral extraction from formations, including outburst-dangerous formations and ones characterized with high gas content.

SUBSTANCE: drilling rig comprises housing, support, drive to rotate drilling rod provided with cutting tool and hydraulic cylinder for cutting tool pulldown. Electrohydraulic valve is installed in hydraulic cylinder circuit. Electric drive of electrohydraulic valve is linked with load-sensing unit, which detects load applied to drilling rod rotation drive. The electric drive is connected to load-sensing unit through amplifier relay to provide bringing amplifier relay into operation when load applied to rotation drive exceeds nominal load by 20-30%. Cutting tool is made as symmetric screw conveying surfaces defining forward and reverse strokes connected one with another through generatrix. Side cutting edges of surfaces defining forward and reverse strokes are spaced apart.

EFFECT: increased operational reliability along with reduced power inputs for drilling, possibility to remove rod from well with negligible deviation thereof from predetermined direction of drilling.

2 cl, 3 dwg

FIELD: mechanical engineering, particularly to perform remote control specially adapted for machines for slitting or completely freeing the mineral.

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EFFECT: increased safety for people present in zone of moving mining machine parts action.

1 dwg

FIELD: mining industry.

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EFFECT: higher precision.

2 cl, 9 dwg

FIELD: mining industry.

SUBSTANCE: device has two asynchronous electric engines, connected via reducers to drive sprockets of continuous traction chain, provided with plane carriages with their possible displacement along the guide, and hydraulic cylinders for displacing guide on pit-face. To windings of stators of first and second electric engines connected respectively are outputs of first and second frequency converters, inputs of which are connected to power grid and control inputs of which are connected respectively to outputs of first and second frequency adjusters. To frequency adjusters also connected are inputs of load detectors, to outputs of which load balancing block is connected, outputs of which are connected to inputs of first frequency adjuster. To inputs of both frequency adjusters output of load adjuster is connected, inputs of which are connected to load-setting block and load sensor for second engine. To output of second frequency converter connected are input of control block, other input of which is connected to signal block of base plant, and stator winding of third asynchronous engine, which via mechanical link is connected to first and second hydraulic pumps, having constant working volumes. Output of first hydraulic pump is connected to force hydro-main and input of second preventing hydraulic valve and to first inputs of two-position hydraulic distributors with electromagnetic control, to electromagnets of which outputs of control block are connected. Second inputs of two-positional hydraulic distributors with electromagnetic control are connected to control chambers of hydro-controlled two-positional hydro-distributors, which are part of hydro-blocks. Outputs of hydro-controlled two-positional distributors are connected to opposite hollows of volumetric dosing device of each hydro-block, and their inputs are connected respectively to outputs of hydro-distributors for controlling hydro-cylinder for moving the guide on pit-face, inputs of each of which are connected to force and drain hydro-mains, and outputs are connected to piston and rod hollows of appropriate hydro-cylinder.

EFFECT: higher efficiency.

1 dwg

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The invention relates to the mining industry, namely the automation control tunnel complexes

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FIELD: mining industry.

SUBSTANCE: device has two asynchronous electric engines, connected via reducers to drive sprockets of continuous traction chain, provided with plane carriages with their possible displacement along the guide, and hydraulic cylinders for displacing guide on pit-face. To windings of stators of first and second electric engines connected respectively are outputs of first and second frequency converters, inputs of which are connected to power grid and control inputs of which are connected respectively to outputs of first and second frequency adjusters. To frequency adjusters also connected are inputs of load detectors, to outputs of which load balancing block is connected, outputs of which are connected to inputs of first frequency adjuster. To inputs of both frequency adjusters output of load adjuster is connected, inputs of which are connected to load-setting block and load sensor for second engine. To output of second frequency converter connected are input of control block, other input of which is connected to signal block of base plant, and stator winding of third asynchronous engine, which via mechanical link is connected to first and second hydraulic pumps, having constant working volumes. Output of first hydraulic pump is connected to force hydro-main and input of second preventing hydraulic valve and to first inputs of two-position hydraulic distributors with electromagnetic control, to electromagnets of which outputs of control block are connected. Second inputs of two-positional hydraulic distributors with electromagnetic control are connected to control chambers of hydro-controlled two-positional hydro-distributors, which are part of hydro-blocks. Outputs of hydro-controlled two-positional distributors are connected to opposite hollows of volumetric dosing device of each hydro-block, and their inputs are connected respectively to outputs of hydro-distributors for controlling hydro-cylinder for moving the guide on pit-face, inputs of each of which are connected to force and drain hydro-mains, and outputs are connected to piston and rod hollows of appropriate hydro-cylinder.

EFFECT: higher efficiency.

1 dwg

FIELD: mining industry.

SUBSTANCE: mining combine has extraction means, on which a body is mounted, having at least one first liquid outlet, for supplying liquid to material. Pipeline, through which liquid is fed to first liquid outlet, contains means for measuring flow and/or pressure of liquid in pipeline, for determining, in which of to layers outlet is positioned. Combine can have at least one second liquid outlet, placed in such a way, that first liquid outlet is in lower layer, and second liquid outlet is placed in upper layer. First liquid outlet can have one of multiple first liquid outlets spaced from each other, and second liquid outlet - one of multiple spaced from each other second liquid outlets. Efficiency of liquid flow through multiple spaced first outlets can surpass those of multiple spaced from each other second liquid outlets. Placement of second liquid outlet in separate body cover is possible. First and second liquid outlets can be directed downwardly relatively to direction of mining combine displacement. Method for controlling depth of position of mining combine extraction means includes placing two liquid outlets, interacting with material extraction means, in a material, while second liquid outlet is placed above first liquid outlet, liquid is fed to first and second liquid outlets and flow and/or pressure of liquid is measured. Layer, wherein liquid outlet lies, is detected, and first liquid outlet is placed in lower layer and second liquid outlet is placed in upper layer, to determine depth of position of extraction means relatively to two layers.

EFFECT: higher precision.

2 cl, 9 dwg

FIELD: mechanical engineering, particularly to perform remote control specially adapted for machines for slitting or completely freeing the mineral.

SUBSTANCE: system includes electric drive for cutting tools, hydraulic drive for feeder legs and crawler, two-stage control hydroblock to operate the hydraulic drive having inlet channel, hydrocylinder with piston cavity for support erector, control hydroblock adapted to operate support erector hydrocylinder, blocking hydrocylinder having spring-loaded shaft return means, two-positioned pilot spool, pumps, pressurizing means and discharge means. Pilot spool has outlet channel and hydrocontrol cavity to provide pilot spool fixation in two working positions. Outlet channel of pilot spool communicates with outlet channel of two-stage control hydroblock adapter to operate the hydraulic drive of feeder legs and crawler to provide alternate communication between outlet pilot spool channel and pressurizing and discharge means. Hydrocontrol cavity of pilot spool communicates with blocking hydrocylinder and piston cavity of support erector hydrocylinder.

EFFECT: increased safety for people present in zone of moving mining machine parts action.

1 dwg

Well drilling rig // 2265121

FIELD: mining industry, particularly for drilling exploratory and pressure-relief wells before mineral extraction from formations, including outburst-dangerous formations and ones characterized with high gas content.

SUBSTANCE: drilling rig comprises housing, support, drive to rotate drilling rod provided with cutting tool and hydraulic cylinder for cutting tool pulldown. Electrohydraulic valve is installed in hydraulic cylinder circuit. Electric drive of electrohydraulic valve is linked with load-sensing unit, which detects load applied to drilling rod rotation drive. The electric drive is connected to load-sensing unit through amplifier relay to provide bringing amplifier relay into operation when load applied to rotation drive exceeds nominal load by 20-30%. Cutting tool is made as symmetric screw conveying surfaces defining forward and reverse strokes connected one with another through generatrix. Side cutting edges of surfaces defining forward and reverse strokes are spaced apart.

EFFECT: increased operational reliability along with reduced power inputs for drilling, possibility to remove rod from well with negligible deviation thereof from predetermined direction of drilling.

2 cl, 3 dwg

FIELD: mining, particularly remote control specially adapted for machines for slitting or completely freeing the mineral.

SUBSTANCE: device comprises the first, the second and the third asynchronous motors. The first and the second electric drives are connected to drive sprocket of closed pull chain provided with plough carriages, which may move along guiding means. Device also has hydraulic cylinders to move guiding means to face, mechanical gear, the first and the second safety hydraulic valves, the first and the second hydraulic pumps, the first and the second frequency converters, the first and the second frequency regulators, load sensors, load balancing unit, load regulator, load assignment unit, control unit, initial setting signaling unit, hydraulic distribution means, which control hydraulic cylinders to move guiding means to face, hydraulic units, electrohydraulic unit, channel switching unit, flow meter, excavated seam thickness setting unit, breakage face length setting unit, multiplication unit, divider, optimizing peak-holding controller, control signal generation unit, asynchronous single-phase motor and screw gear made as a nut and screw. The first and the second hydraulic pumps include volume regulation means.

EFFECT: reduced specific energy consumption along with increased front plant output.

1 dwg

FIELD: mining.

SUBSTANCE: invention relates to mining, in particular, to navigation system of combined cutter-loader intended for operations in open-pit bench. This mining equipment includes a combined cutter-loader, a conveyor assembly, and a steering assembly, which joins said combined cutter-loader and conveyor assembly. In addition, this equipment includes a course sensor and a steering device, which is sensitive to signals from said course sensor. The first drive is located in combined cutter-loader, in conveyor assembly, or in steering assembly. The first drive is placed on one side of combined cutter-loader centreline. In addition, the second drive is located either in combined cutter-loader, or in conveyor assembly, or in steering assembly. The second drive is placed on another side of combined cutter-loader centreline. The first and the second drives are used to adjust angle of joint between combined cutter- loader and conveyor assembly on either side of parallel line in order to keep pre-defined direction of combined cutter-loader advancing.

EFFECT: precise driving of combined cutter-loader in order to increase coal cutting from mining zone.

22 cl, 13 dwg

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