CN113731291B - Grinding material stirring device for underground hydraulic slotting and online continuous grinding material water supply method - Google Patents
Grinding material stirring device for underground hydraulic slotting and online continuous grinding material water supply method Download PDFInfo
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- CN113731291B CN113731291B CN202111167084.4A CN202111167084A CN113731291B CN 113731291 B CN113731291 B CN 113731291B CN 202111167084 A CN202111167084 A CN 202111167084A CN 113731291 B CN113731291 B CN 113731291B
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Abstract
The invention discloses an abrasive material stirring device for underground hydraulic slotting, which comprises a stirring tank, wherein the top of the stirring tank is provided with a feeding funnel for providing abrasive materials into the stirring tank, the bottom of the stirring tank is provided with a water inlet, the side part of the stirring tank is connected with a water outlet main pipe, and the water outlet main pipe is provided with a water outlet pump; the effluent of the water outlet main pipe is used as water for jet flow slotting; the water inlet is connected with a water source through a water inlet pipe, and the water pressure of the water source is higher than the water pressure when the stirring tank is filled with water; a slag discharge valve is arranged downwards at the bottom end of the stirring tank; the top end of the stirring tank is provided with a variable-frequency explosion-proof motor, and an output shaft of the variable-frequency explosion-proof motor extends downwards into the stirring tank and is connected with a stirring mechanism. The invention also discloses a corresponding online continuous water supply method for the abrasive water. The water flow is driven by the water distribution disc to rotate to form upward rotating water flow; the rotating direction of the rotating upward water flow is opposite to that of each stirring blade layer, the turbulence is stronger, the stirring effect is improved, the grinding materials and the water are mixed more uniformly, and the jet flow slotting operation effect is improved.
Description
Technical Field
The invention relates to the technical field of hydraulic slotting in coal mines, in particular to a mixing technology of abrasive and water.
Background
As a hydraulic measure widely applied, the hydraulic slotting technology has very obvious application effect in the aspects of coal bed permeability increase and roof control.
The traditional hydraulic seam cutting technology uses pure water as a medium, the seam cutting effect on hard coal and even rock is not ideal, and the concrete characteristics are that the seam cutting depth is shallow, the coal seam permeability increasing effect is poor, and the directional expansion range of a hydraulic fracture is limited.
The addition and the use of the grinding material can obviously improve the hydraulic slotting effect. However, the density of common hydraulic slotting abrasives such as diamond and silicon carbide is obviously higher than that of water, and the existing abrasive stirring device cannot realize uniform mixing of the abrasives, so that the hydraulic slotting effect is not ideal.
Therefore, in order to effectively solve the problem that the hydraulic slotting effect is poor due to uneven mixing of the abrasive, it is necessary to develop an abrasive stirring device for hydraulic slotting. The prior abrasive water is supplied to jet flow slot after being stirred in advance, and cannot be continuously stirred and supplied on line in the jet flow slot process.
Disclosure of Invention
The invention aims to provide an abrasive stirring device for underground hydraulic slotting, which is used for improving the uniform mixing degree of abrasives and water so as to improve the effect of hydraulic slotting.
In order to achieve the purpose, the grinding material stirring device for the underground hydraulic slotting comprises a stirring tank, wherein a feeding funnel for providing grinding materials into the stirring tank is arranged at the top of the stirring tank, a water inlet is formed in the bottom of the stirring tank, a water outlet main pipe is connected to the side part of the stirring tank, and a water outlet pump is arranged on the water outlet main pipe; the effluent of the water outlet main pipe is used as water for jet flow slotting;
the water inlet is connected with a water source through a water inlet pipe, and the water pressure of the water source is higher than the water pressure when the stirring tank is filled with water;
a slag discharge valve is arranged downwards at the bottom end of the stirring tank;
the top end of the stirring tank is provided with a variable-frequency explosion-proof motor, and an output shaft of the variable-frequency explosion-proof motor extends downwards into the stirring tank and is connected with a stirring mechanism.
The stirring mechanism comprises a stirring blade device and a rotary water distribution device;
the stirring blade device comprises a plurality of stirring blade layers, and each stirring blade layer is horizontally arranged and is connected to an output shaft of the variable-frequency explosion-proof motor at intervals up and down; each stirring blade layer comprises two stirring blade groups, and the two stirring blade groups are centrosymmetric about an output shaft of the variable-frequency explosion-proof motor;
a plurality of stirring blades in each stirring blade group form an arithmetic progression, the shortest stirring blade is one sixth to one fifth of the radius of the stirring tank, and the longest stirring blade is one sixth to nine tenth of the radius of the stirring tank;
an output shaft of the variable-frequency explosion-proof motor extends downwards into the transmission shell and is fixedly connected with a first bevel gear; the transmission shell is fixedly connected with the inner wall of the stirring tank through a connecting rod or a connecting frame; a fourth bevel gear, a second bevel gear, a third bevel gear and the first bevel gear are arranged in the transmission shell; the first bevel gear and the fourth bevel gear are both horizontally arranged, and the second bevel gear and the third bevel gear are both vertically arranged;
the left part of the first bevel gear is downwards meshed with the second bevel gear, and the right part of the first bevel gear is downwards meshed with the third bevel gear; the second bevel gear is downwards meshed with the left part of the fourth bevel gear, and the third bevel gear is downwards meshed with the right part of the fourth bevel gear; the mounting shaft of the second bevel gear and the mounting shaft of the third bevel gear are respectively in running fit with the inner surface of the transmission shell through bearings;
the fourth bevel gear is connected with a second rotating shaft downwards, the rotating direction of the second rotating shaft is opposite to that of the output shaft of the variable-frequency explosion-proof motor, the second rotating shaft extends downwards out of the transmission shell and is fixedly connected with the rotary water distribution device, the rotary water distribution device comprises a water distribution disc fixedly connected with the second rotating shaft, a plurality of water distribution through hole groups are uniformly arranged on the water distribution disc along the circumferential direction, each water distribution through hole group comprises a plurality of water distribution through holes uniformly arranged at intervals along the radial direction, and the water distribution through holes vertically penetrate through the water distribution disc and are used for forming rotary upward water flow;
the water distribution plate is horizontally arranged, a gap is formed between the radial outer peripheral surface of the water distribution plate and the inner wall of the stirring tank, the water distribution plate is higher than the water inlet, and a water separation cavity is enclosed between the water distribution plate and the bottom surface of the stirring tank.
The water distribution through holes are obliquely arranged, and the oblique direction of the water distribution through holes is consistent with the rotating direction of the water distribution plate.
The side part of the stirring tank is connected with the water outlet main pipe through a uniform discharging device;
the uniform discharging device comprises three water outlet branch pipes and a water mixing tank, wherein one end of each of the three water outlet branch pipes is connected with the side wall of the stirring tank, and the other end of each of the three water outlet branch pipes is connected with the water mixing tank; the joints of the three water outlet branch pipes and the side arms of the stirring tank are arranged at intervals up and down, and the water mixing tank is connected with the water outlet main pipe.
The device also comprises an electric control device, and the electric control device is connected with a display screen;
a feeding electromagnetic valve is arranged at the feeding hopper, and a water inlet electromagnetic valve and a water inlet electronic flowmeter are arranged on the water inlet pipe; the three water outlet branch pipes are respectively provided with a water outlet electromagnetic valve and a water outlet electronic flowmeter;
the water outlet pump, the variable-frequency explosion-proof motor, the feeding electromagnetic valve, the water inlet electronic flowmeter, each water outlet electromagnetic valve and each water outlet electronic flowmeter are respectively connected with the electric control device.
A slag box used for containing slag discharged by the slag discharging valve is arranged below the slag discharging valve, a horizontally arranged filter screen is arranged in the middle of the slag box, a water discharging valve is arranged at the bottom of the slag box, and meshes of the filter screen are smaller than the grain size of the grinding materials.
The invention also discloses an online continuous water supply method of the abrasive water by using the abrasive stirring device for the underground hydraulic slotting, which comprises the following steps:
1. opening the water inlet electromagnetic valve, closing each water outlet electromagnetic valve, and injecting water into the stirring tank to a preset water level, wherein the preset water level is higher than each stirring blade; starting the variable-frequency explosion-proof motor to enable each stirring blade to start to rotate;
2. opening a feeding electromagnetic valve, and closing a water inlet electromagnetic valve; according to the preset mass concentration of the grinding materials and the water amount in the stirring tank, the grinding materials are added into the stirring tank through a feeding funnel, then a feeding electromagnetic valve is closed, and the water and the grinding materials are mixed in the rotating and stirring process of a stirring blade;
3. stirring for 1-3 minutes, simultaneously filling the grinding material into the feeding funnel, and then simultaneously opening the feeding electromagnetic valve, the water outlet pump, the water inlet electromagnetic valve and each outlet electromagnetic valve;
the mass of the abrasive entering the stirring tank through the feeding funnel in unit time is M1, the mass of the effluent in unit time is M2, the opening degrees of the feeding electromagnetic valve and each effluent electromagnetic valve are adjusted to enable M1/(M1 + M2) to be equal to the preset mass concentration of the abrasive, and the abrasive water for jet flow slotting is continuously stirred and continuously supplied;
during the processes of continuous stirring and continuous abrasive water supply, water in the water inlet pipe enters the water distribution cavity in the stirring tank through the water inlet, the water in the water distribution cavity passes through the water distribution disc upwards through the water distribution through holes, when the water flows through the water distribution through holes, an upwards inclined water flow is formed under the rotation action of the water distribution disc, so that a rotary upward water flow is formed above the water distribution disc, and the rotation direction of the stirring blades is opposite to the rotation direction of the rotary upward water flow to generate turbulent flow so that the abrasive is fully mixed with the water;
4. after the jet flow slotting operation is completed, the variable-frequency explosion-proof motor, the feeding electromagnetic valve, the water outlet pump, the water inlet electromagnetic valve and the water outlet electromagnetic valves are closed, and the abrasive water reserved in the stirring tank is used for supplying for the next jet flow slotting operation.
During the third step, the staff monitors the real-time data of the water inlet electronic flow meter and each water outlet electronic flow meter and the opening degree of the feeding electromagnetic valve through the display screen;
the water inlet electromagnetic valve and the water outlet electromagnetic valves are collectively called as a water path electromagnetic valve, and when the speed of the abrasive entering the stirring tank is not matched with the water inlet speed and the water outlet speed, the opening degree of the feeding electromagnetic valve and/or the water path electromagnetic valve is adjusted to restore the matched state.
After working for a long time, carrying out slag discharge recovery work;
the slag discharge and recovery work is as follows: firstly, cleaning and recovering the grinding materials in a feeding hopper; then closing the water inlet electromagnetic valve and each water outlet electromagnetic valve, opening the feeding electromagnetic valve, opening the slag discharge valve, injecting water into the stirring tank through the feeding hopper, and starting the variable-frequency explosion-proof motor;
water containing abrasive materials in the stirring tank is discharged into the slag box through the slag discharge valve and falls onto the filter screen, the water enters the slag box below the filter screen through the filter screen, and the water in the slag box is discharged out by opening the drain valve; and after the grinding materials on the filter screen are not increased any more, stopping injecting water into the stirring tank, closing the variable-frequency explosion-proof motor, recovering the grinding materials collected on the filter screen, and finally closing the slag discharge valve and the feeding electromagnetic valve.
The invention has the following advantages:
when the water distributor works, water flows upwards through the water distribution cavity and enters each water distribution through hole of the water distribution disc, and then the water flows are driven by the water distribution disc to rotate, so that the water flows upwards leave the water distribution through holes and are not vertically upwards, but obliquely upwards to form upwards rotating water flows; the rotating direction of the upward rotating water flow is opposite to that of each stirring blade layer, so that stronger turbulent flow is generated after the upward vertical water flow is collided with the stirring blades, the stirring effect is improved, the grinding materials and water are mixed more uniformly, the jet flow slotting operation effect is improved, and the consistency of the jet flow slotting operation effect is ensured.
The specific gravity of the abrasive is higher than that of water, and if the water flow rotating upwards does not exist, the abrasive deposition phenomenon is easy to gradually occur at the bottom of the stirring tank. The rotating upward water flow prevents the abrasive from depositing and improves the uniform mixing degree of the abrasive and the water.
In the invention, the first bevel gear indirectly drives the fourth bevel gear to rotate through the second bevel gear and the third bevel gear, and the transmission relationship internally determines that the fourth bevel gear and the first bevel gear have opposite rotating directions, thereby ensuring that the rotating direction of each stirring blade layer is opposite to the rotating direction of the water distribution disc.
Because two bevel gears are arranged between the first bevel gear and the second bevel gear for simultaneous transmission, the structure stress is more balanced, the whole transmission structure is more stable, the transmission process is more stable, and the first bevel gear and the fourth bevel gear are prevented from being easily damaged due to the stress on one side.
A plurality of stirring vane in each stirring vane group form the arithmetic progression for such setting for the agitator tank is inside can be stirred evenly apart from the output shaft of frequency conversion explosion-proof machine's each department of difference far and near in the radial direction, avoids appearing stirring dead angle.
Two stirring vane groups are central symmetry about the output shaft of frequency conversion explosion-proof machine for everywhere water in the agitator tank experiences twice stirring effect of the stirring vane of various lengths in turn in a rotation period, improves the stirring effect.
The water distribution through holes are obliquely arranged, the oblique direction of the water distribution through holes is consistent with the rotating direction of the water distribution disc, when water flows out of the water distribution through holes (the water flows out of the water distribution through holes are called as motion water flows) and contacts with water above the water distribution disc (water originally existing above the water distribution disc is called as raw water), the motion water flows and the raw water have smaller speed difference, so that friction between the motion water flows and the raw water is reduced, the rotating water flows formed by the motion water flows in the stirring tank are strengthened (a limit state is assumed, if the friction is too large, the rotating water flows cannot be formed), further, the turbulence degree caused when the motion water flows meet the stirring blades is strengthened, and the purpose of strengthening the uniform stirring degree is achieved.
Even discharging device goes out water simultaneously from the three position of agitator tank difference from top to bottom, supplies with the play water house steward after mixing, has further guaranteed the misce bene degree of abrasive material to the uniformity of abrasive material content in the different periods play water has been improved. In particular, since the water in the stirring tank is not moving, if the stirring tank has only one water outlet (only one water outlet branch pipe is connected), the water reaching the water outlet at different time periods sometimes mainly comes from the water at the bottom of the stirring tank, sometimes mainly comes from the water at the top or the middle of the stirring tank, and therefore the abrasive content in the water at different time periods is not stable enough. The invention takes water from three different positions, namely the upper position, the middle position and the lower position, and mixes the water, thereby improving the consistency of the content of the abrasive materials in the water discharged from different periods.
The electric control device, the electromagnetic valves and the flowmeters provide a foundation for controlling the feeding speed and the water inlet speed and realizing online stirring so as to provide uninterrupted water outlet, and are convenient for workers to control and monitor the whole working state of the stirring tank.
The setting of sediment case, filter screen and drain valve can be when the agitator tank is arranged the sediment, stays the slag charge on the filter screen in the sediment case to go out the water discharge, can reduce environmental pollution by a wide margin like this, provide the basis for the abrasive material on the recycle filter screen. The recovery of the abrasives also reduces the amount of abrasives required and reduces the overall pollution caused by manufacturing the abrasives in society. In a word, the invention greatly reduces the pollution amount directly discharged into the environment, indirectly reduces the overall pollution caused by manufacturing the grinding material, and has better significance for environmental protection.
The online continuous water supply method for the abrasive water fills the technical blank that the jet flow slotting operation can not supply water continuously, so that the large-scale jet flow slotting operation or the continuous jet flow slotting operation becomes possible. The jet flow slotting operation is not limited by stirring one tank of abrasive water and then stirring one tank of abrasive water to perform one jet flow slotting operation, so that the efficiency of the abrasive water jet flow slotting operation is greatly improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 isbase:Sub>A view from A-A of FIG. 1;
FIG. 3 is an enlarged schematic view of the transmission housing of FIG. 1;
fig. 4 is an electrical control schematic of the present invention.
Detailed Description
As shown in fig. 1 to 4, the abrasive stirring device for hydraulic underground slotting of the present invention comprises a stirring tank 1, wherein a feeding funnel 2 for providing abrasive to the stirring tank 1 is arranged at the top of the stirring tank 1, a water inlet 3 is arranged at the bottom of the stirring tank 1, a water outlet main pipe 4 is connected to the side of the stirring tank 1, and a water outlet pump 5 is arranged on the water outlet main pipe 4; the effluent of the effluent main pipe 4 is used as water for jet flow slotting;
the water inlet 3 is connected with a water source (water source is not shown in the figure) through a water inlet pipe 6, and the water pressure of the water source is higher than that of the stirring tank 1 when the stirring tank 1 is filled with water, namely the water pressure of the water source is enough to fill the stirring tank 1 with water; the water source may be a municipal water supply network or a water supply pump connected to the water tank. Because the invention is used in the underground of the coal mine and has lower position, the stirring tank 1 has sufficient water pressure no matter the water is supplied by a water supply pump or a municipal water supply network.
A slag discharge valve 7 is arranged at the bottom of the stirring tank 1 downwards; the top end of the stirring tank 1 is provided with a variable-frequency explosion-proof motor 8, and an output shaft 19 of the variable-frequency explosion-proof motor 8 extends downwards into the stirring tank 1 and is connected with a stirring mechanism.
The stirring mechanism comprises a stirring blade device and a rotary water distribution device;
the stirring blade device comprises a plurality of stirring blade layers 9, and each stirring blade layer 9 is horizontally arranged and is connected to an output shaft 19 of the variable-frequency explosion-proof motor 8 through a sleeve 10 at intervals up and down; each stirring blade layer 9 comprises two stirring blade groups, and the two stirring blade groups are arranged in a central symmetry mode about an output shaft 19 of the variable-frequency explosion-proof motor 8.
The plurality of stirring blades 22 in each stirring blade group form an arithmetic progression, the shortest stirring blade 22 is one sixth to one fifth of the radius of the stirring tank 1, and the longest stirring blade 22 is five sixths to nine tenths (both ends inclusive) of the radius of the inner wall of the stirring tank 1;
an output shaft 19 of the variable-frequency explosion-proof motor 8 extends downwards into the transmission shell 11 and is fixedly connected with a first bevel gear 12; the transmission shell 11 is fixedly connected with the inner wall of the stirring tank 1 through a connecting rod 13 or a connecting frame; a fourth bevel gear 16, a second bevel gear 14, a third bevel gear 15 and the first bevel gear 12 are arranged in the transmission shell 11; the first bevel gear 12 and the fourth bevel gear 16 are both horizontally arranged, and the second bevel gear 14 and the third bevel gear 15 are both vertically arranged; (wherein first bevel gear 12 and fourth bevel gear 16 are disposed opposite to each other, and second bevel gear 14 and third bevel gear 15 are disposed opposite to each other)
The left part of the first bevel gear 12 is downwards meshed with the second bevel gear 14, and the right part of the first bevel gear 12 is downwards meshed with the third bevel gear 15; second bevel gear 14 meshes downwards with the left part of fourth bevel gear 16, and third bevel gear 15 meshes downwards with the right part of fourth bevel gear 16; the mounting shaft of the second bevel gear 14 and the mounting shaft of the third bevel gear 15 are respectively in running fit with the inner surface of the transmission housing 11 through bearings 17;
the fourth bevel gear 16 is connected with a second rotating shaft 18 downwards, the rotating direction of the second rotating shaft 18 is opposite to the rotating direction of an output shaft 19 of the variable-frequency explosion-proof motor 8, the second rotating shaft 18 extends downwards out of the transmission shell 11 and is fixedly connected with the rotary water distribution device, the rotary water distribution device comprises a water distribution disc 20 fixedly connected with the second rotating shaft 18, a plurality of water distribution group through hole groups are uniformly arranged on the water distribution disc 20 along the circumferential direction, each water distribution group through hole group comprises a plurality of water distribution through holes 21 uniformly arranged at intervals along the radial direction, and the water distribution through holes 21 vertically penetrate through the water distribution disc 20 and are used for forming rotary upward water flow;
the water distribution disk 20 is horizontally arranged, a gap is formed between the radial peripheral surface of the water distribution disk 20 and the inner wall of the stirring tank 1, the water distribution disk 20 is higher than the water inlet 3, and a water distribution cavity 23 is enclosed between the water distribution disk 20 and the bottom surface of the stirring tank 1.
When the water distributor works, water flows upwards through the water distribution cavity 23 and enters each water distribution through hole 21 of the water distribution disc 20, and then the water flows are driven by the water distribution disc 20 to rotate, so that the water flows upwards leave the water distribution through holes 21 and then do not vertically upwards, but obliquely upwards form upwards-rotating water flows; the rotating direction of the upward rotating water flow is opposite to that of each stirring blade layer 9, so that stronger turbulent flow is generated after the upward vertical water flow collides with the stirring blades 22, the stirring effect is improved, the grinding materials and the water are mixed more uniformly, the jet flow slotting operation effect is improved, and the consistency of the jet flow slotting operation effect is ensured.
The specific gravity of the abrasive is higher than that of water, and if upward water flow does not exist, the abrasive deposition phenomenon is easy to gradually occur at the bottom of the stirring tank 1. The rotating upward water flow prevents the abrasive from depositing and improves the uniform mixing degree of the abrasive and the water.
The plurality of stirring blades 22 in each stirring blade 22 group form an arithmetic progression, and the arrangement enables all parts in the stirring tank 1 which are far away from the output shaft 19 of the variable-frequency explosion-proof motor 8 in the radial direction to be uniformly stirred, so that the occurrence of stirring dead angles is avoided.
The two stirring blade 22 groups are centrosymmetric about the output shaft 19 of the variable-frequency explosion-proof motor 8, so that water at each position in the stirring tank 1 is subjected to the stirring action of the stirring blades 22 with different lengths twice in a rotation period, and the stirring effect is improved.
In the invention, the first bevel gear 12 indirectly drives the fourth bevel gear 16 to rotate through the second bevel gear 14 and the third bevel gear 15, and the transmission relationship determines that the fourth bevel gear 16 and the first bevel gear 12 rotate in opposite directions, thereby ensuring that the rotation direction of each stirring blade layer 9 is opposite to the rotation direction of the water distribution disc 20.
Because two bevel gears are arranged between the first bevel gear 12 and the second bevel gear 14 for simultaneous transmission, the structural stress is more balanced, the whole transmission structure is more stable, the transmission process is more stable, and the first bevel gear 12 and the fourth bevel gear 16 are prevented from being easily damaged due to the stress on one side.
The water distribution through holes 21 are all obliquely arranged, and the oblique direction is consistent with the rotating direction of the water distribution plate 20. When the water distribution tray 20 rotates counterclockwise with the top view direction of fig. 1 as the forward direction and the direction facing the viewer as the forward direction, the left of the water distribution through holes 21 in the front of the water distribution tray 20 in fig. 1 is low and the right is high, the right of the water distribution through holes 21 in the rear of the water distribution tray 20 in fig. 1 is low and the left is high, the back of the water distribution through holes 21 in the left of the water distribution tray 20 in fig. 1 is low and the front of the water distribution through holes 21 in the right of the water distribution tray 20 in fig. 1 is high and the front of the water distribution through holes 21 in the right of the water distribution tray 20 in fig. 1 is low and the back of the water distribution through holes.
Each water distribution through hole 21 is obliquely arranged and the oblique direction is consistent with the rotation direction of the water distribution disc 20, so that when water flows out of the water distribution through holes 21 (the water flows out of the water distribution through holes 21 are called as motion water flows) and contacts with water above the water distribution disc 20 (the water originally existing above the water distribution disc 20 is called as raw water), the motion water flows and the raw water have smaller speed difference, thereby reducing the friction between the motion water flows and the raw water, strengthening the rotation water flows formed by the motion water flows in the stirring tank 1 (a limit state is supposed, if the friction is too large, the rotation water flows cannot be formed), further strengthening the turbulence degree caused when the motion water flows meet the stirring blades 22, and achieving the purpose of strengthening the uniform stirring degree.
The side part of the stirring tank 1 is connected with the water outlet main pipe 4 through a uniform discharging device; the uniform discharging device comprises three water outlet branch pipes 24 and a water mixing tank, wherein one ends of the three water outlet branch pipes 24 are connected with the side wall of the stirring tank 1, and the other ends of the three water outlet branch pipes are connected with the water mixing tank 25; the joints of the three water outlet branch pipes 24 and the side arms of the stirring tank 1 are arranged at intervals up and down, and the water mixing tank 25 is connected with the water outlet main pipe 4.
Even discharging device goes out water simultaneously from the three position of agitator tank 1 upper and lower difference, supplies with outlet header 4 after mixing, has further guaranteed the misce bene degree of abrasive material to the uniformity of abrasive material content in the different periods of play water has been improved. Specifically, since the water in the stirring tank 1 is not moving, if the stirring tank 1 has only one water outlet (only one water outlet branch pipe 24 is connected), the water reaching the water outlet at different time periods sometimes mainly comes from the water at the bottom of the stirring tank 1, sometimes mainly comes from the water at the top or the middle of the stirring tank 1, and thus the abrasive content in the water at different time periods is not stable enough. The invention simultaneously takes water from the upper, middle and lower different positions and mixes the water, thereby improving the consistency of the content of the abrasive materials in the water discharged at different periods.
The device also comprises an electric control device 26, wherein the electric control device 26 is connected with a display screen 27;
a feeding electromagnetic valve 28 is arranged at the feeding hopper 2, and a water inlet electromagnetic valve 29 and a water inlet electronic flowmeter 30 are arranged on the water inlet pipe 6; the three water outlet branch pipes 24 are respectively provided with a water outlet electromagnetic valve 31 and a water outlet electronic flowmeter 32;
the water outlet pump 5, the variable-frequency explosion-proof motor 8, the feeding electromagnetic valve 28, the water inlet electromagnetic valve 29, the water inlet electronic flowmeter 30, the water outlet electromagnetic valves 31 and the water outlet electronic flowmeters 32 are respectively connected with the electric control device 26.
The electronic control device 26 is preferably a PLC in a single chip microcomputer, and may also be an integrated circuit or an industrial control computer. The electric control device 26, the electromagnetic valves and the flow meters provide a foundation for controlling the feeding speed and the water inlet speed and realizing online stirring so as to provide uninterrupted water outlet, and are convenient for workers to control and monitor the overall working state of the stirring tank 1.
A slag box 33 used for containing slag discharged by the slag discharging valve 7 is arranged below the slag discharging valve 7, a filter screen 34 horizontally arranged is arranged in the middle of the slag box 33, a drain valve 35 is arranged at the bottom of the slag box 33, and meshes of the filter screen 34 are smaller than the grain diameter of the abrasive.
The setting of sediment case 33, filter screen 34 and drain valve 35 can be when agitator tank 1 arranges the sediment, stays the slag charge on the filter screen 34 in sediment case 33 to go out the water discharge, can reduce environmental pollution by a wide margin like this, provide the basis for the abrasive material on the recycle filter screen 34. The recovery of the abrasives also reduces the amount of abrasives required and reduces the overall pollution caused by manufacturing the abrasives in society. In a word, the invention greatly reduces the pollution amount directly discharged into the environment, indirectly reduces the overall pollution caused by manufacturing the grinding material, and has better significance for environmental protection.
The invention also discloses an online continuous water supply method of the abrasive water by using the abrasive stirring device for the underground hydraulic slotting, which comprises the following steps:
1. opening the water inlet electromagnetic valve 29, closing each water outlet electromagnetic valve 31, and injecting water into the stirring tank 1 to a preset water level, wherein the preset water level is higher than each stirring blade 22; starting the variable-frequency explosion-proof motor 8 to enable each stirring blade 22 to start to rotate;
2. the feeding electromagnetic valve 28 is opened, and the water inlet electromagnetic valve 29 is closed; adding abrasive to the stirring tank 1 through the feeding hopper 2 according to the preset mass concentration of the abrasive and the water amount in the stirring tank 1, then closing the feeding electromagnetic valve 28, and mixing the water and the abrasive in the rotating stirring of the stirring blade 22;
3. stirring for 1-3 minutes (including both ends), filling the grinding material in the feeding funnel 2, and then opening the feeding electromagnetic valve 28, the water outlet pump 5, the water inlet electromagnetic valve 29 and each outlet electromagnetic valve;
the mass of the abrasive entering the stirring tank 1 through the feeding hopper 2 in unit time is M1, the mass of the effluent in unit time is M2, the opening degrees of the feeding electromagnetic valve 28 and each effluent electromagnetic valve 31 are adjusted to enable M1/(M1 + M2) to be equal to the preset abrasive mass concentration, and continuous stirring and continuous supply of abrasive water for jet flow slotting are carried out;
in the process of continuously stirring and continuously supplying the abrasive water, water in the water inlet pipe 6 enters the water distribution cavity 23 in the stirring tank 1 through the water inlet 3, the water in the water distribution cavity 23 upwards passes through the water distribution disc 20 through the water distribution through holes 21, when the water flows through the water distribution through holes 21, an upwards inclined water flow is formed under the rotation action of the water distribution disc 20, so that a rotary upward water flow is formed above the water distribution disc 20, and the rotation direction of the stirring blades 22 is opposite to the rotation direction of the rotary upward water flow to generate turbulence so as to fully mix the abrasive and the water;
4. after the jet flow slotting operation is finished, the variable frequency explosion-proof motor 8, the feeding electromagnetic valve 28, the water outlet pump 5, the water inlet electromagnetic valve 29 and the water outlet electromagnetic valves 31 are closed, and the abrasive water reserved in the stirring tank 1 is used for the next jet flow slotting operation.
The online continuous water supply method for the abrasive water fills the technical blank that the jet flow slotting operation can not supply water continuously, so that the large-scale jet flow slotting operation or the continuous jet flow slotting operation becomes possible. The jet flow slotting operation is not limited by stirring one tank of abrasive water and then stirring one tank of abrasive water to perform one jet flow slotting operation, so that the efficiency of the abrasive water jet flow slotting operation is greatly improved.
During the third step, the staff monitors the real-time data of the water inlet electronic flow meter 30 and each water outlet electronic flow meter 32 and the opening degree of the feed electromagnetic valve 28 through the display screen 27;
the water inlet solenoid valve 29 and the water outlet solenoid valves 31 are collectively referred to as a water path solenoid valve, and when the speed of the abrasive entering the stirring tank 1 is not matched with the water inlet speed and the water outlet speed, the opening degree of the feed solenoid valve 28 and/or the water path solenoid valve is adjusted to return to the matching state.
After working for a long time, carrying out slag discharge recovery work;
the slag discharge and recovery work is as follows: firstly, cleaning and recovering the grinding materials in the feeding hopper 2; then closing the water inlet electromagnetic valve 29 and each water outlet electromagnetic valve 31, opening the feeding electromagnetic valve 28, opening the slag discharge valve 7, injecting water into the stirring tank 1 through the feeding hopper 2, and starting the variable-frequency explosion-proof motor 8;
the water containing the grinding materials in the stirring tank 1 is discharged into the slag box 33 through the slag discharging valve 7 and falls on the filter screen 34, the water enters the slag box 33 below the filter screen 34 through the filter screen 34, and the water in the slag box 33 is discharged out by opening the water discharging valve 35; when the grinding materials on the filter screen 34 are not increased any more, stopping injecting water into the stirring tank 1, closing the variable-frequency explosion-proof motor 8, recovering the grinding materials collected on the filter screen 34, and finally closing the slag discharge valve 7 and the feeding electromagnetic valve 28.
The slag discharge recovery work can clean the stirring tank 1, maintain the clean state in the stirring tank 1, and recover the abrasive.
Of course, the grinding material stirring device for the underground hydraulic slotting can be used for on-line continuous water supply of the grinding material water, and can also be used for off-line closed mixed grinding material, after mixing, the stirring is stopped to supply water, the water with the capacity of one stirring tank 1 is stirred and supplied at one time, and after one tank of water is used up, the next tank of water is stirred. This simple mixed water supply will not be described in detail.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention any modifications and equivalents.
Claims (7)
1. A abrasive material agitating unit for hydraulic cutting in pit, including agitator tank, its characterized in that: a feeding funnel for providing abrasive materials into the stirring tank is arranged at the top of the stirring tank, a water inlet is arranged at the bottom of the stirring tank, a water outlet main pipe is connected to the side part of the stirring tank, and a water outlet pump is arranged on the water outlet main pipe; the effluent of the water outlet main pipe is used as water for jet flow slotting;
the water inlet is connected with a water source through a water inlet pipe, and the water pressure of the water source is higher than the water pressure when the stirring tank is filled with water;
a slag discharge valve is arranged downwards at the bottom end of the stirring tank;
the top end of the stirring tank is provided with a variable-frequency explosion-proof motor, and an output shaft of the variable-frequency explosion-proof motor extends downwards into the stirring tank and is connected with a stirring mechanism;
the stirring mechanism comprises a stirring blade device and a rotary water distribution device;
the stirring blade device comprises a plurality of stirring blade layers, and each stirring blade layer is horizontally arranged and is connected to an output shaft of the variable-frequency explosion-proof motor at intervals up and down; each stirring blade layer comprises two stirring blade groups, and the two stirring blade groups are centrosymmetric about an output shaft of the variable-frequency explosion-proof motor;
a plurality of stirring blades in each stirring blade group form an arithmetic progression, the shortest stirring blade is one sixth to one fifth of the radius of the stirring tank, and the longest stirring blade is five sixths to nine tenths of the radius of the stirring tank;
an output shaft of the variable-frequency explosion-proof motor extends downwards into the transmission shell and is fixedly connected with a first bevel gear; the transmission shell is fixedly connected with the inner wall of the stirring tank through a connecting rod or a connecting frame; a fourth bevel gear, a second bevel gear, a third bevel gear and the first bevel gear are arranged in the transmission shell; the first bevel gear and the fourth bevel gear are both horizontally arranged, and the second bevel gear and the third bevel gear are both vertically arranged;
the left part of the first bevel gear is downwards meshed with the second bevel gear, and the right part of the first bevel gear is downwards meshed with the third bevel gear; the second bevel gear is downwards meshed with the left part of the fourth bevel gear, and the third bevel gear is downwards meshed with the right part of the fourth bevel gear; the mounting shaft of the second bevel gear and the mounting shaft of the third bevel gear are respectively in running fit with the inner surface of the transmission shell through bearings;
the fourth bevel gear is connected with a second rotating shaft downwards, the rotating direction of the second rotating shaft is opposite to that of an output shaft of the variable-frequency explosion-proof motor, the second rotating shaft extends downwards out of the transmission shell and is fixedly connected with the rotary water distribution device, the rotary water distribution device comprises a water distribution disc fixedly connected with the second rotating shaft, a plurality of water distribution through hole groups are uniformly arranged on the water distribution disc along the circumferential direction, each water distribution through hole group comprises a plurality of water distribution through holes uniformly arranged along the radial direction at intervals, and the water distribution through holes vertically penetrate through the water distribution disc and are used for forming upward rotating water flow;
the water distribution disc is horizontally arranged, a gap is formed between the radial outer peripheral surface of the water distribution disc and the inner wall of the stirring tank, the water distribution disc is higher than the water inlet, and a water separation cavity is enclosed between the water distribution disc and the bottom surface of the stirring tank;
the side part of the stirring tank is connected with the water outlet main pipe through a uniform discharging device;
the uniform discharging device comprises three water outlet branch pipes and a water mixing tank, wherein one end of each of the three water outlet branch pipes is connected with the side wall of the stirring tank, and the other end of each of the three water outlet branch pipes is connected with the water mixing tank; the joints of the three water outlet branch pipes and the side arm of the stirring tank are uniformly arranged at intervals up and down, and the water mixing tank is connected with the water outlet main pipe.
2. The abrasive stirring device for hydraulic downhole slitting according to claim 1, wherein: and each water distribution through hole is obliquely arranged, and the oblique direction is consistent with the rotating direction of the water distribution plate.
3. The abrasive stirring device for hydraulic downhole slitting according to claim 1 or 2, wherein: the device also comprises an electric control device, and the electric control device is connected with a display screen;
a feeding electromagnetic valve is arranged at the feeding hopper, and a water inlet electromagnetic valve and a water inlet electronic flowmeter are arranged on the water inlet pipe; the three water outlet branch pipes are respectively provided with a water outlet electromagnetic valve and a water outlet electronic flowmeter;
the water outlet pump, the variable-frequency explosion-proof motor, the feeding electromagnetic valve, the water inlet electronic flowmeter, each water outlet electromagnetic valve and each water outlet electronic flowmeter are respectively connected with the electric control device.
4. The abrasive stirring device for hydraulic downhole slitting according to claim 3, wherein: a slag box for containing slag discharged by the slag discharge valve is arranged below the slag discharge valve, a horizontally arranged filter screen is arranged in the middle of the slag box, a drain valve is arranged at the bottom of the slag box, and meshes of the filter screen are smaller than the grain diameter of the abrasive.
5. The method for continuously supplying abrasive water on line by using the abrasive stirring device for the underground hydraulic slotting as claimed in claim 4 is characterized by comprising the following steps of:
1. opening the water inlet electromagnetic valve, closing each water outlet electromagnetic valve, and injecting water into the stirring tank to a preset water level, wherein the preset water level is higher than each stirring blade; starting the variable-frequency explosion-proof motor to enable each stirring blade to start rotating;
2. opening a feeding electromagnetic valve and closing a water inlet electromagnetic valve; according to the preset mass concentration of the grinding materials and the water amount in the stirring tank, the grinding materials are added into the stirring tank through a feeding funnel, then a feeding electromagnetic valve is closed, and the water and the grinding materials are mixed in the rotating and stirring process of a stirring blade;
3. stirring for 1-3 minutes, simultaneously filling the grinding material into the feeding funnel, and then simultaneously opening the feeding electromagnetic valve, the water outlet pump, the water inlet electromagnetic valve and each outlet electromagnetic valve;
the mass of the abrasive entering the stirring tank through the feeding funnel in unit time is M1, the mass of the effluent in unit time is M2, the opening degrees of the feeding electromagnetic valve and each effluent electromagnetic valve are adjusted to enable M1/(M1 + M2) to be equal to the preset mass concentration of the abrasive, and the abrasive water for jet flow slotting is continuously stirred and continuously supplied;
in the processes of continuous stirring and continuous supply of abrasive water, water in a water inlet pipe enters a water distribution cavity in a stirring tank through a water inlet, the water in the water distribution cavity passes through a water distribution disc upwards through water distribution through holes, when the water passes through the water distribution through holes, an upwards inclined water flow is formed under the rotation action of the water distribution disc, so that a rotary upward water flow is formed above the water distribution disc, and the rotation direction of a stirring blade is opposite to the rotation direction of the rotary upward water flow to generate turbulent flow so that the abrasive and the water are fully mixed;
4. after the jet flow slotting operation is completed, the variable-frequency explosion-proof motor, the feeding electromagnetic valve, the water outlet pump, the water inlet electromagnetic valve and the water outlet electromagnetic valves are closed, and the abrasive water reserved in the stirring tank is used for supplying for the next jet flow slotting operation.
6. The on-line continuous water supply method of abrasive water according to claim 5, characterized in that: in the process of the third step, the staff monitors the real-time data of the water inlet electronic flowmeter and each water outlet electronic flowmeter and the opening degree of the feeding electromagnetic valve through the display screen;
the water inlet electromagnetic valve and the water outlet electromagnetic valves are collectively called as a water path electromagnetic valve, and when the speed of the abrasive entering the stirring tank is not matched with the water inlet speed and the water outlet speed, the opening degree of the feeding electromagnetic valve and/or the water path electromagnetic valve is adjusted to restore the matched state.
7. The on-line continuous water supply method of abrasive water according to claim 6, characterized in that: after working for a long time, carrying out slag discharge recovery work;
the slag discharge recovery work is as follows: firstly, cleaning and recovering the grinding materials in a feeding hopper; then closing the water inlet electromagnetic valve and each water outlet electromagnetic valve, opening the feeding electromagnetic valve, opening the slag discharge valve, injecting water into the stirring tank through the feeding hopper, and starting the variable-frequency explosion-proof motor;
water containing abrasive materials in the stirring tank is discharged into the slag box through the slag discharge valve and falls onto the filter screen, the water enters the slag box below the filter screen through the filter screen, and the water in the slag box is discharged out by opening the drain valve; and after the grinding materials on the filter screen are not increased any more, stopping injecting water into the stirring tank, closing the variable-frequency explosion-proof motor, recovering the grinding materials collected on the filter screen, and finally closing the slag discharge valve and the feeding electromagnetic valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111167084.4A CN113731291B (en) | 2021-10-02 | 2021-10-02 | Grinding material stirring device for underground hydraulic slotting and online continuous grinding material water supply method |
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| CN202111167084.4A CN113731291B (en) | 2021-10-02 | 2021-10-02 | Grinding material stirring device for underground hydraulic slotting and online continuous grinding material water supply method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210333652U (en) * | 2019-08-17 | 2020-04-17 | 河南省科学院生物研究所有限责任公司 | Water injection cleaning spray head for stirring tank |
| CN213556440U (en) * | 2020-10-30 | 2021-06-29 | 包头轻工职业技术学院 | Even grass machine that mixes of water distribution |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103510936A (en) * | 2013-10-08 | 2014-01-15 | 中国矿业大学 | Double-ejector type three-phase jet flow slotting system and method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210333652U (en) * | 2019-08-17 | 2020-04-17 | 河南省科学院生物研究所有限责任公司 | Water injection cleaning spray head for stirring tank |
| CN213556440U (en) * | 2020-10-30 | 2021-06-29 | 包头轻工职业技术学院 | Even grass machine that mixes of water distribution |
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