A water-saving system for adaptively adjusting the amount of water for slag flushing

Abstract

The present invention provides a water-saving system for adaptively regulating the amount of slag flushing water, comprising a second controller, a regulating member, a water pump assembly, and multiple slag discharge branches. The water pump assembly includes a water pump and a driving member for driving the water pump, and the multiple slag discharge branches are connected in parallel at the water outlet of the water pump. The second controller sends a control instruction to the regulating member based on the number of slag discharge branches opened and the drill bit specifications of the rock drill corresponding to the opened slag discharge branches. The regulating member controls the rotation speed of the driving member according to the control instruction to change the theoretical flow rate of the water pump. The present invention can achieve adaptive matching of the theoretical output flow rate of the water pump with the flow rate required for actual drilling conditions, thereby achieving the purpose of water conservation. Compared with the prior art method of directly controlling the on-off of the water channel through a stop valve, the water-saving effect of the present invention is more significant.

Description

Technical Field

[0001] The present invention relates to the technical field of rock drilling engineering machinery, and in particular to a water-saving system for adaptively regulating the amount of slag flushing water. Background Art

[0002] Multi-arm drilling rigs are large-scale rock drilling machines equipped with multiple hydraulic rock drills. They are widely used in various mines, mountain tunnels, and water conservancy projects, offering advantages such as high drilling speed and high efficiency. Currently, drilling rigs primarily use water and air deslagging methods. Water deslagging, compared to air deslagging, offers advantages such as high cooling efficiency of the hydraulic system and reduced drilling dust. Therefore, water deslagging remains the mainstream method, except in certain geological formations where water deslagging is unsuitable.

[0003] Drilling rigs using water deslagging are equipped with booster pumps to meet the required water pressure and flow. However, during drill-and-blast construction, the rigs must simultaneously handle tasks such as anchor bolting, advance drilling, face excavation drilling, advance pre-support drilling, and pipe support drilling. These operations require drilling holes of varying diameters and using drill bits of varying sizes. Therefore, the pumps used must meet the flow requirements of each size. Consequently, the rated flow rate of the selected pumps is too high. When the rig switches to drilling with a smaller drill bit, or when only N booms (N < the total number of booms) are used simultaneously on a multi-boom drilling rig, the water flow rate provided by the pump exceeds the required flow rate for the current drilling operation. The excess water must be discharged through a safety valve. This situation increases water costs and makes wastewater treatment more difficult in some water-scarce tunnels. Therefore, it is crucial to develop a water system that can automatically adjust the pump flow rate based on the size of the hole and the number of drill rigs drilling simultaneously.

[0004] In summary, there is an urgent need for a water-saving system that can adaptively adjust the amount of water used for slag flushing to solve the problems existing in the prior art. Summary of the Invention

[0005] The present invention aims to provide a water-saving system that adaptively adjusts the amount of water used for slag flushing, aiming to solve the problem of mismatch between the output flow of the water pump and the actual working conditions of the drilling rig, which results in a waste of water resources due to the fact that part of the water can only be discharged through the overflow of the safety valve. The specific technical solution is as follows:

[0006] A water-saving system for adaptively adjusting the amount of slag flushing water comprises a second controller, a regulating member, a water pump assembly and a plurality of slag discharge branches, wherein the water pump assembly comprises a water pump and a driving member for driving the water pump, and the plurality of slag discharge branches are connected in parallel at the water outlet of the water pump;

[0007] The controller 2 sends a control instruction to the regulating part according to the number of slag discharge branches opened and the drill bit specifications of the rock drill corresponding to the opened slag discharge branches. The regulating part controls the rotation speed of the driving part according to the control instruction to change the theoretical flow of the water pump.

[0008] The above technical solution is preferably also provided with a water flow meter, which is arranged at the water outlet of the water pump, and multiple slag discharge branches are connected in parallel to the outlet end of the water flow meter; the water flow meter is used to detect the actual flow of the water pump and feed it back to the controller 2; the actual flow is compared with the theoretical flow of the water pump controlled by the controller 2 to form a closed-loop control.

[0009] Preferably, in the above technical solution, the slag discharge branch includes a speed regulating valve and an electromagnetic ball valve connected in series, and the electromagnetic ball valve is electrically connected to the second controller to feed back the on-off information of the slag discharge branch to the second controller.

[0010] Preferably, in the above technical solution, the water-saving system further includes a second safety valve, and the second safety valve and a plurality of slag discharge branches are connected in parallel to the outlet end of the water flow meter.

[0011] Preferably, in the above technical solutions, an exchanger for performing heat exchange with the hydraulic system of the drilling rig is provided on one side of the inlet end of the water flow meter.

[0012] Preferably, in the above technical solution, the water-saving system further comprises a forced cooling branch, and the forced cooling branch is connected to the outlet end of the water flow meter;

[0013] The forced cooling branch includes a forced cooling electromagnetic ball valve and a regulating ball valve connected in series, and the forced cooling electromagnetic ball valve is connected to the second controller;

[0014] The hydraulic system of the drilling rig is provided with a temperature sensor for detecting the temperature of the hydraulic oil, and the temperature sensor is electrically connected to the controller 2; when each slag discharge branch is in a cut-off state and the hydraulic oil temperature of the hydraulic system of the drilling rig exceeds the limit, the forced cooling branch is opened to dissipate heat from the hydraulic system of the drilling rig.

[0015] In the above technical solution, the hydraulic system of the rock drilling rig includes a controller 1 and a plurality of rock drilling machine working branches;

[0016] The rock drill working branch includes an electric proportional control valve 1 and a rock drill rotary motor connected in series. The controller 1 sends a control instruction to the electric proportional control valve 1 according to the drill bit specifications. The electric proportional control valve 1 adjusts the opening according to the control instruction to control the speed of the rock drill rotary motor.

[0017] Among the above technical solutions, the water-saving system further includes a filter, a pressure gauge, a safety valve, a water cooler and a pressure switch connected in series in sequence, the pressure switch is connected to the water inlet end of the water pump, and the filter is connected to the water source; the water cooler is used for heat exchange with the hydraulic system of the drilling rig.

[0018] In the above technical solution, after confirming the specifications of the drill bit to be used, the theoretical flushing fluid flow rate required for the slag discharge branch corresponding to the drill bit is calculated as follows:

[0019]

[0020] Wherein, Q1 is the theoretical flushing fluid flow rate, in L / s; D h D is the drilling diameter in mm; p is the outer diameter of the drill pipe, in mm; v h is the return velocity of the flushing liquid, in m / s;

[0021] The sum of the theoretical flushing liquid flow rates required for each slag discharge branch in the open state is the optimal flushing reflux total flow rate Q, and the rotational speed of the driving component is controlled according to the optimal flushing reflux total flow rate Q.

[0022] In the above technical solution, the water pump assembly is preferably a liquid-driven water pump, wherein the driving component is a liquid-driven water pump motor, and the water pump is driven to work by the liquid-driven water pump motor; the regulating component is an electric proportional regulating valve 2; the speed N1 required by the liquid-driven water pump is calculated according to formula (2), the oil source flow q1 required by the liquid-driven water pump motor is calculated according to formula (3), and the opening of the electric proportional regulating valve 2 is adjusted according to the oil source flow q1 required by the liquid-driven water pump motor;

[0023]

[0024] q1=N1v 马达 η2 (3),

[0025] Where Q is the optimal flushing reflux total flow rate, in L / s; N1 is the required speed of the liquid drive pump, in r / min; v 水泵 is the rated displacement of the liquid drive water pump, in ml / r; η1 is the total efficiency of the liquid drive water pump; q1 is the oil source flow required by the liquid drive water pump motor, in L / min; v 马达 is the rated displacement of the liquid-driven water pump motor, in ml / r; η2 is the total efficiency of the liquid-driven water pump motor.

[0026] The application of the technical solution of the present invention has the following beneficial effects:

[0027] The present invention controls the theoretical output flow of the water pump based on the number of open slag discharge branches and the drill bit specifications of the rock drill corresponding to the open slag discharge branches. This can achieve adaptive matching of the theoretical output flow of the water pump with the flow required for actual drilling conditions, thereby achieving the purpose of water conservation. Compared with the prior art method of directly controlling the on-off of the water channel through a stop valve, the water conservation effect of the present invention is more significant. At the same time, the speed of the rock drill is linked to the drill bit specifications. After the drill bit specifications are input into the control interface, the rock drill can be operated at a speed that matches the drill bit. That is, the present invention can achieve the linkage of water flow and rock drill speed with the drill bit specifications. When a larger-sized drill bit is replaced, the water flow and rock drill speed are both increased. When a smaller-sized drill bit is replaced, the water flow and rock drill speed are both reduced.

[0028] The present invention sets a water flow meter to detect the actual flow of the water pump, compares the actual flow with the theoretical flow of the water pump controlled by controller 2 to form a closed-loop control, and realizes the true adaptive matching of the water pump output flow and the flow required by the actual drilling conditions, thereby achieving the purpose of water saving.

[0029] The electromagnetic ball valve in the slag discharge branch is electrically connected to the second controller. The electromagnetic ball valve can feed back the on-off information of the slag discharge branch to the second controller. The second controller can accurately obtain the number of open slag discharge branches and realize accurate adaptive control of water flow.

[0030] The water branch (i.e., water-saving system) is used to exchange heat with the hydraulic system of the drilling rig through a water cooler. The slag discharge branch can discharge the exchanged heat when working, thereby cooling the hydraulic system of the drilling rig. An additional forced cooling branch is provided. When the slag discharge branches are cut off (i.e., when in standby mode and no drilling construction is being carried out), the forced cooling branch can be opened alone to dissipate heat from the hydraulic system of the drilling rig.

[0031] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0033] Figure 1 This is the principle diagram of the water-saving system for adaptively adjusting the amount of water for slag flushing;

[0034] Figure 2 This is the control flow chart of the water-saving system for adaptively adjusting the amount of water for slag flushing;

[0035] Among them, 1-water hose reel, 2-filter, 3-pressure gauge, 4-safety valve 1, 5-water cooler, 6-pressure switch, 7-water pump assembly, 8-electric proportional control valve 2, 9-safety valve 2, 10-right arm speed control valve, 11-right arm solenoid ball valve, 12-middle arm speed control valve, 13-middle arm solenoid ball valve, 14-left arm speed control valve, 15-left arm solenoid ball valve, 16-forced cooling solenoid ball valve, 17-regulating ball valve, 18-drain ball valve, 19-left rock drill rotary motor, 20-left electric proportional control valve, 21-water flow meter, 22-temperature sensor, 23-middle rock drill rotary motor, 24-middle electric proportional control valve, 25-right rock drill rotary motor, 26-right electric proportional control valve. DETAILED DESCRIPTION

[0036] To facilitate understanding of the present invention, the present invention will be described more fully below, along with preferred embodiments thereof. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0038] Example 1:

[0039] See also Figure 1 and Figure 2 A water-saving system for adaptively adjusting the amount of slag flushing water includes a second controller, a regulating member, a water pump assembly 7, and a plurality of slag discharge branches. The water pump assembly 7 includes a water pump and a driving member for driving the water pump. The plurality of slag discharge branches are connected in parallel at the water outlet of the water pump.

[0040] The controller 2 sends a control instruction to the regulating part according to the number of slag discharge branches opened and the drill bit specifications of the rock drill corresponding to the opened slag discharge branches. The regulating part controls the rotation speed of the driving part according to the control instruction to change the theoretical flow of the water pump.

[0041] Furthermore, after confirming the specifications of the drill bit to be used, the theoretical flushing fluid flow required for the slag discharge branch corresponding to the drill bit is calculated as follows:

[0042]

[0043] Wherein, Q1 is the theoretical flushing fluid flow rate, in L / s; D h D is the drilling diameter (i.e. the diameter of the drill bit), in mm; pis the outer diameter of the drill pipe, in mm; v h is the return velocity of the flushing fluid, in m / s; further, according to the "Geological Core Drilling Regulations", under different geological conditions and different borehole diameters, cemented carbide drilling should maintain the return velocity of the flushing fluid at 0.2m / s~0.6m / s.

[0044] There is a one-to-one correspondence between the rock drill and the slag discharge branch. The drill bit specifications and the theoretical flushing fluid flow corresponding to the drill bit can be configured in advance in the controller 2; when multiple rock drills are working at the same time, the sum of the theoretical flushing fluid flow required by all the slag discharge branches in the open state is the optimal flushing reflux total flow Q (that is, the theoretical flow of the water pump). The speed of the driving part is controlled according to the optimal flushing reflux total flow Q, that is, the controller 2 sends a control instruction to the regulating part according to Q to achieve the theoretical flow of the water pump, which is the optimal flushing reflux total flow Q.

[0045] See also Figure 1 The water-saving system also includes a water flow meter 21, which is arranged at the water outlet of the water pump, and multiple slag discharge branches are connected in parallel to the outlet end of the water flow meter 21; the water flow meter 21 is used to detect the actual flow of the water pump and feed it back to the controller 2; the actual flow is compared with the theoretical flow of the water pump controlled by the controller 2 to form a closed-loop control, and the comparison signal acts on the regulating component to realize closed-loop control.

[0046] The slag discharge branch includes a speed regulating valve and an electromagnetic ball valve connected in series in sequence. The speed regulating valve is used to ensure that the water flow of the rock drill is not affected by the load. The electromagnetic ball valve is electrically connected to the second controller to feed back the on-off information of the slag discharge branch to the second controller; specifically, the electromagnetic ball valve is equipped with a travel switch. After the electromagnetic ball valve is fully opened, the travel switch is energized, and the second controller collects the travel switch signal to obtain the number of open slag discharge branches.

[0047] In this embodiment, there are three slag discharge branches, namely the right arm rock drill slag discharge branch, the middle arm rock drill slag discharge branch and the left arm rock drill slag discharge branch of the rock drilling rig; the right arm rock drill slag discharge branch includes a right arm speed regulating valve 10 and a right arm electromagnetic ball valve 11 connected in series in sequence; the middle arm rock drill slag discharge branch includes a middle arm speed regulating valve 12 and a middle arm electromagnetic ball valve 13 connected in series in sequence; the left arm rock drill slag discharge branch includes a left arm speed regulating valve 14 and a left arm electromagnetic ball valve 15 connected in series in sequence; the on-off information of the three slag discharge branches is fed back to the controller 2 through the right arm electromagnetic ball valve 11, the middle arm electromagnetic ball valve 13 and the left arm electromagnetic ball valve 15, so that the controller 2 can control the theoretical flow of the water pump according to the actual number of working rock drills and the drill bits used by the rock drills, thereby achieving the effect of adaptively adjusting the water volume.

[0048] Furthermore, an exchanger for heat exchange with the hydraulic system of the drilling rig is provided on one side of the inlet end of the water flow meter 21, that is, the heat in the hydraulic system of the drilling rig enters the water-saving system (i.e., the water branch) through the exchanger to dissipate heat and cool the hydraulic system of the drilling rig.

[0049] See also Figure 1 The water-saving system further includes a forced cooling branch, and the forced cooling branch and multiple slag discharge branches are connected in parallel to the outlet end of the water flow meter 21; the forced cooling branch includes a forced cooling electromagnetic ball valve 16 and a regulating ball valve 17 connected in series; the forced cooling electromagnetic ball valve 16 is connected to the second controller, and the opening and closing of the forced cooling electromagnetic ball valve 16 is controlled by the second controller;

[0050] Preferably, the drainage flow rate of the forced cooling branch can be adjusted by adjusting the ball valve.

[0051] The hydraulic system of the drilling rig is provided with a temperature sensor 22 for detecting the temperature of the hydraulic oil, and the temperature sensor 22 is electrically connected to the second controller; when all the slag discharge branches are in the cut-off state and the hydraulic oil temperature of the hydraulic system of the drilling rig exceeds the limit, the forced cooling branch is opened to dissipate heat from the hydraulic system of the drilling rig; that is, when the drilling rig is in the standby state but not drilling, and the hydraulic oil temperature rises to the maximum limit value, the second controller can open the forced cooling electromagnetic ball valve 16 to discharge hot water to keep the hydraulic oil temperature within an allowable range.

[0052] Furthermore, when the drilling rig is performing drilling operations, the hot water after heat exchange is discharged through the slag discharge branch, thereby achieving the effect of cooling and dissipating heat for the hydraulic system of the drilling rig.

[0053] See also Figure 1 The hydraulic system of the rock drilling rig includes a controller 1 and multiple rock drilling machine working branches; the multiple rock drilling machine working branches are connected in parallel to the oil inlet branch, wherein the temperature sensor 22 is arranged on the oil inlet branch.

[0054] The rock drill working branch includes an electric proportional control valve 1 and a rock drill rotary motor connected in series. The controller 1 sends a control instruction to the electric proportional control valve 1 according to the drill bit specifications. The electric proportional control valve 1 adjusts the opening according to the control instruction to control the speed of the rock drill rotary motor.

[0055] Corresponding to the three slag discharge branches, this embodiment also includes three rock drill working branches, namely the left arm rock drill working branch, the middle arm rock drill working branch and the right arm rock drill working branch; the left arm rock drill working branch includes a left electric proportional control valve 20 and a left rock drill rotary motor 19 connected in series in sequence, the middle arm rock drill working branch includes a middle electric proportional control valve 24 and a middle rock drill rotary motor 23 connected in series in sequence, and the right arm rock drill working branch includes a right electric proportional control valve 26 and a right rock drill rotary motor 25 connected in series in sequence.

[0056] Taking the left-arm rock drill operating branch as an example, controller 1 sends control commands to the left electric proportional control valve 20 based on the drill bit specifications (the specifications of the drill bit installed in the left-arm rock drill). The left electric proportional control valve 20 adjusts its opening according to the control command to control the speed of the left rock drill's rotary motor 19. The operating principles of the middle-arm rock drill operating branch and the right-arm rock drill operating branch are similar to those of the left-arm rock drill operating branch.

[0057] This embodiment enables the rock drill's rotational speed to be linked to the drill bit specifications. After the drill bit specifications are entered on the control interface, the rock drill can be operated at a speed that matches the drill bit. The drill bit specifications and the recommended rock drill rotational speed values ​​for each drill bit specification can be pre-configured in Controller 1.

[0058] Furthermore, the water-saving system includes a filter 2, a pressure gauge 3, a safety valve 4, a water cooler 5, and a pressure switch 6 connected in series. The pressure switch 6 is connected to the water inlet of the water pump, and the filter 2 is connected to a water source. The water cooler is used to exchange heat with the hydraulic system of the drilling rig. Furthermore, the filter 2 is connected to the water source via a water hose reel 1. The filter 2 is also connected to a wastewater ball valve 18.

[0059] The water-saving system further comprises a safety valve 2 9, which, along with the forced cooling branch and a plurality of slag discharge branches, is connected in parallel to the outlet of the water flow meter 21. The safety valve 2 9 is used to protect the water-saving system and prevent the water pressure from exceeding the limit.

[0060] Preferably, in this embodiment, the water pump assembly 7 is a liquid-driven water pump, wherein the driving member is a liquid-driven water pump motor, and the water pump is driven to work by the liquid-driven water pump motor; the regulating member is an electric proportional regulating valve 8;

[0061] Specifically, the second and first electric proportional control valves (in this embodiment, the left electric proportional control valve 20, the center electric proportional control valve 24, and the right electric proportional control valve 26 are all electric proportional control valves 1) are both electric proportional flow valves. The larger their opening, the greater the flow rate allowed through, and the corresponding rock drill rotary motor and hydraulic drive water pump motor speed increases. Preferably, the water pump assembly 7 is a plunger pump.

[0062] Furthermore, on the basis of obtaining the optimal total flushing reflux flow Q, the required speed N1 of the liquid drive water pump is calculated according to formula (2), and the required oil source flow q1 of the liquid drive water pump motor is calculated according to formula (3), and the opening of the electric proportional control valve 28 is adjusted according to the required oil source flow q1 of the liquid drive water pump motor;

[0063]

[0064] q1=N1v 马达 η2 (3),

[0065] Where Q is the optimal flushing reflux total flow rate, in L / s; N1 is the required speed of the liquid drive pump, in r / min; v 水泵 is the rated displacement of the liquid drive water pump, in ml / r; η1 is the total efficiency of the liquid drive water pump; q1 is the oil source flow required by the liquid drive water pump motor, in L / min; v 马达 is the rated displacement of the liquid-driven water pump motor, in ml / r; η2 is the total efficiency of the liquid-driven water pump motor.

[0066] Those skilled in the art will appreciate that, in addition to using a liquid-driven water pump, the water pump assembly may also use a combination of a variable frequency motor and a water pump, wherein the variable frequency motor is used to drive the water pump, and changing the speed of the variable frequency motor changes the flow rate of the water pump.

[0067] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A water-saving system for adaptively adjusting the amount of water for slag flushing, characterized in that: It comprises a second controller, a regulating member, a water pump assembly (7) and a plurality of slag discharge branches, wherein the water pump assembly (7) comprises a water pump and a driving member for driving the water pump, and the plurality of slag discharge branches are connected in parallel at the water outlet end of the water pump; The second controller sends a control instruction to the regulating member according to the number of slag discharge branches opened and the drill bit specifications of the rock drill corresponding to the opened slag discharge branches. The regulating member controls the rotation speed of the driving member according to the control instruction to change the theoretical flow rate of the water pump; It also includes a water flow meter (21), which is arranged at the water outlet of the water pump, and a plurality of slag discharge branches are connected in parallel to the outlet of the water flow meter (21); the water flow meter (21) is used to detect the actual flow of the water pump and feed it back to the second controller; the actual flow is compared with the theoretical flow of the water pump controlled by the second controller to form a closed-loop control; An exchanger for performing heat exchange with the hydraulic system of the drilling rig is provided on one side of the inlet end of the water flow meter (21); The hydraulic system of the rock drilling rig includes a controller 1 and a plurality of rock drilling machine working branches; The rock drill working branch includes an electric proportional control valve 1 and a rock drill rotary motor connected in series. The controller 1 sends a control instruction to the electric proportional control valve 1 according to the drill bit specifications. The electric proportional control valve 1 adjusts the opening according to the control instruction to control the speed of the rock drill rotary motor.

2. The water-saving system for adaptively adjusting the amount of water for slag flushing according to claim 1 is characterized in that: The slag discharge branch includes a speed regulating valve and an electromagnetic ball valve connected in series. The electromagnetic ball valve is electrically connected to the second controller to feed back the on-off information of the slag discharge branch to the second controller.

3. The water-saving system for adaptively adjusting the amount of water for slag flushing according to claim 1 is characterized in that: The water-saving system further comprises a second safety valve (9), wherein the second safety valve (9) and a plurality of slag discharge branches are connected in parallel to the outlet end of the water flow meter (21).

4. The water-saving system for adaptively adjusting the amount of water for slag flushing according to any one of claims 1 to 3, characterized in that: The water-saving system further comprises a forced cooling branch, wherein the forced cooling branch is connected to the outlet end of the water flow meter (21); The forced cooling branch comprises a forced cooling electromagnetic ball valve (16) and a regulating ball valve (17) connected in series, and the forced cooling electromagnetic ball valve (16) is connected to the second controller; The rock drilling rig hydraulic system is provided with a temperature sensor (22) for detecting the temperature of the hydraulic oil, and the temperature sensor (22) is electrically connected to the second controller; when each slag discharge branch is in a cut-off state and the hydraulic oil temperature of the rock drilling rig hydraulic system exceeds a limit, the forced cooling branch is opened to dissipate heat from the rock drilling rig hydraulic system.

5. The water-saving system for adaptively adjusting the amount of water for slag flushing according to claim 4 is characterized in that: The multiple slag discharge branches are three slag discharge branches, namely the right arm rock drill slag discharge branch, the middle arm rock drill slag discharge branch and the left arm rock drill slag discharge branch of the rock drilling rig.

6. The water-saving system for adaptively adjusting the amount of water for slag flushing according to claim 4 is characterized in that: The water-saving system further comprises a filter (2), a pressure gauge (3), a safety valve (4), a water cooler (5) and a pressure switch (6) connected in series in sequence, wherein the pressure switch (6) is connected to the water inlet of the water pump, and the filter (2) is connected to a water source; the water cooler (5) is used for heat exchange with the hydraulic system of the drilling rig.

7. The water-saving system for adaptively adjusting the amount of water for slag flushing according to claim 1 is characterized in that: After confirming the drill bit specifications used, the theoretical flushing fluid flow required for the slag discharge branch corresponding to the drill bit is calculated as follows: （1）， in, Q 1 is the theoretical flushing fluid flow rate, in L / s; D h is the drilling diameter, in mm; D p is the outer diameter of the drill pipe, in mm; is the return velocity of the flushing liquid, in m / s; The sum of the theoretical flushing liquid flow required for each slag discharge branch in the open state is the optimal flushing reflux total flow Q , according to the optimal total flushing reflux flow Q Controls the speed of the drive element.

8. The water-saving system for adaptively adjusting the amount of water for slag flushing according to claim 7 is characterized in that: The water pump assembly (7) is a liquid-driven water pump, wherein the driving part is a liquid-driven water pump motor, which drives the water pump to work; the regulating part is an electric proportional regulating valve 2 (8); the required speed of the liquid-driven water pump is calculated according to formula (2): N 1. Calculate the oil source flow required for the liquid-driven water pump motor according to formula (3): , according to the oil source flow required by the liquid drive water pump motor Adjust the opening of the electric proportional control valve 2 (8); （2）， （3）， in, Q is the optimal flushing reflux total flow rate, in L / s; N 1 is the required speed of the liquid-driven water pump, in r / min; is the rated displacement of the liquid-driven water pump, in ml / r; is the total efficiency of the liquid-driven water pump; The oil source flow rate required by the liquid-driven water pump motor, in L / min; is the rated displacement of the liquid-driven water pump motor, in ml / r; is the total efficiency of the liquid-driven water pump motor.

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