Double-gear control system of drilling machine

Abstract

The utility model belongs to the technical field of engineering machinery, and discloses a double-gear control system of a drilling machine, which comprises a gas transmission piece, a first switch valve, a second switch valve, a first pressure regulating valve, a second pressure regulating valve and a gas inlet valve, the gas inlet end of the first switch valve is communicated with the gas transmission piece, and the gas outlet end of the first switch valve is communicated with the gas inlet valve. The air inlet end of the first pressure regulating valve is communicated with the air conveying piece, the air outlet end of the first pressure regulating valve is communicated with the air inlet valve, the air inlet end of the second switch valve is communicated with the air conveying piece, the air outlet end of the second switch valve is communicated with the air inlet end of the second pressure regulating valve, and the air outlet end of the second pressure regulating valve is communicated with the air inlet valve. The double-gear control system of the drilling machine can have two operation working conditions, is suitable for different drilling hole diameters, widens the application range, improves the working efficiency, reduces the working oil consumption and improves the energy-saving effect.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to a two-speed control system for a drilling rig. Background Art

[0002] At present, most of the down-the-hole drilling rigs on the market are single-operating-mode machines, that is, a down-the-hole drilling rig has a single compressor flow and pressure. Figure 1 As shown in the figure, the existing drilling rig control system mainly includes a solenoid switch valve 1', a mechanical pressure regulating valve 2', an oil-gas separator 3', an air intake valve 4', a control switch, and a controller. The switch valve 1' and the pressure regulating valve 2' are connected to the oil-gas separator 3' and the air intake valve 4' respectively through their own air pipelines. The oil-gas separator 3' is provided with a pressure sensor 31'. The control switch, pressure sensor 31', and switch valve 1' are all communicatively connected to the controller. The pressure sensor 31' can detect the internal air pressure data of the oil-gas separator 3' and transmit it to the controller. The control switch can control the opening and closing of the switch valve 1' through the controller.

[0003] Specifically, the drilling rig control system includes three operating modes: loading control, unloading control, and pressure-maintaining control. In loading control mode, the control switch is set to the loading position. The controller receives the loading signal and controls the on-off valve 1' to close, and the pressure regulating valve 2' to fully close, thereby cutting off the control air supply. The control air cannot pass through the intake valve 4' and cannot push the intake valve 4' cylinder to close. At this time, the compressor is loaded. In unloading control mode, the control switch is set to the unloading position. The controller controls the on-off valve 1' to open. The control air flows from the oil-gas separator 3' through the pipeline, through the on-off valve 1' and the intake valve 4', and then pushes the intake valve 4' cylinder to close. At this time, the compressor is unloaded. At the same time, the controller sends the idle speed to the engine ECU to control the engine to idle. When in pressure-maintaining control mode, the controller closes on-off valve 1' and activates pressure-regulating valve 2'. The controller then controls the engine for normal operation according to preset parameters. The control air source flows from oil-gas separator 3' through the pipeline, through pressure-regulating valve 2', and into intake valve 1', adjusting the opening of intake valve 4'. The controller then adjusts the engine speed according to preset instructions, ensuring that the compressor exhaust pressure does not decrease but is also not greater than or equal to the automatic unloading pressure. This system arrangement results in a single compressor exhaust volume, capable of only achieving a single borehole diameter and rock formation hardness. This has a limited range of applications and is unable to adjust flow and pressure to accommodate different borehole diameters and rock formation hardnesses. This results in high fuel consumption and poor energy savings. Utility Model Content

[0004] The purpose of the utility model is to provide a two-speed control system for a drilling rig, which can have two operating conditions, adapt to different drilling hole diameters, broaden the scope of use, improve work efficiency, reduce working fuel consumption, and improve energy-saving effects.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A drilling rig double-grade control system, including gas transmission spare, first switch valve, second switch valve, first pressure regulating valve, second pressure regulating valve and inlet valve, wherein,

[0007] The gas inlet end of the first switch valve is communicated with the gas transmission spare, and the gas outlet end of the first switch valve is communicated with the inlet valve.

[0008] The gas inlet end of the first pressure regulating valve is communicated with the gas transmission spare, and the gas outlet end of the first pressure regulating valve is communicated with the inlet valve.

[0009] The gas inlet end of the second switch valve is communicated with the gas transmission spare, the gas outlet end of the second switch valve is communicated with the gas inlet end of the second pressure regulating valve, and the gas outlet end of the second pressure regulating valve is communicated with the inlet valve.

[0010] As preferably, still including first passage, second passage and third passage, wherein,

[0011] The first passage is communicated between the gas transmission spare and the inlet valve, and the first switch valve is arranged on the first passage.

[0012] The first pressure regulating valve is arranged on the second passage, the gas inlet end of the second passage is communicated with the first passage between the gas transmission spare and the gas inlet end of the first switch valve, and the gas outlet end of the second passage is communicated with the inlet valve.

[0013] The second switch valve and the second pressure regulating valve are sequentially arranged on the third passage, the gas inlet end of the third passage is communicated with the first passage between the gas transmission spare and the gas inlet end of the second passage, and the gas outlet end of the third passage is communicated with the inlet valve.

[0014] As preferably, the control gas path gas inlet end of the inlet valve is provided with a manifold, and the gas outlet end of the first passage, the gas outlet end of the second passage and the gas outlet end of the third passage are all communicated on the manifold.

[0015] As preferably, the manifold is provided with a throttling hole communicated with the outside atmosphere.

[0016] As preferably, the first switch valve and the second switch valve are both arranged as electromagnetic valves.

[0017] As preferably, the gas transmission spare includes an oil-gas separator, and the gas inlet end of the first switch valve, the gas inlet end of the first pressure regulating valve and the gas inlet end of the second switch valve are all communicated with the oil-gas separator.

[0018] As preferably, a pressure sensor is further arranged on the oil-gas separator, and the pressure sensor is used to detect the internal air pressure of the oil-gas separator.

[0019] As preferably, a control switch and a controller are further included, the control switch, the pressure sensor, the first switch valve and the second switch valve are in communication connection with the controller, and the control switch can control the opening and closing of the first switch valve and the second switch valve through the controller.

[0020] As preferably, an air filter is further included, and the air filter is arranged at the air inlet end of the air inlet valve.

[0021] As preferably, a differential pressure indicator is further arranged on the air filter.

[0022] Advantages:

[0023] The drilling machine double-gear control system has two sets of loading control and two sets of pressure maintaining control. The system can be defined as a first loading control mode, a first pressure maintaining control mode, a second loading control mode and a second pressure maintaining control mode. The first loading control mode and the first pressure maintaining control mode can correspond to preset first mode parameters, and the second loading control mode and the second pressure maintaining control mode can correspond to preset second mode parameters.

[0024] Exemplarily, when in the first loading control mode, the first switch valve is closed, the second switch valve is opened, and the first pressure regulating valve and the second pressure regulating valve are both fully closed, so that the control gas in the gas conveying member cannot reach the intake valve and cannot push the intake valve cylinder to close, the compressor is loaded, and the engine speed is automatically adjusted according to the first mode parameter, so that the compressor exhaust capacity meets the gas amount and gas pressure required by the integrated down-the-hole drill when working, and the engine runs at constant power. When in the second loading control mode, the first switch valve is closed, the second switch valve is closed, and the first pressure regulating valve and the second pressure regulating valve are both fully closed, so that the control gas in the gas conveying member cannot reach the intake valve and cannot push the intake valve cylinder to close, the compressor is loaded, and the engine speed is automatically adjusted according to the second mode parameter, so that the compressor exhaust capacity meets the gas amount and gas pressure required by the integrated down-the-hole drill when working, and the engine runs at constant power. When in the first pressure maintaining control mode, the first switch valve is closed, the second switch valve is opened, the first pressure regulating valve is fully closed, and the second pressure regulating valve adjusts its opening degree according to the gas path pressure, at this time, the control gas in the gas conveying member can enter the intake valve through the second switch valve and the second pressure regulating valve in turn, adjust the opening degree of the intake valve, and the controller adjusts the engine speed according to the first mode parameter, so that the compressor exhaust pressure does not decrease but is also not greater than or equal to the automatic unloading pressure. When in the second pressure maintaining control mode, the first switch valve is closed, the second switch valve is closed, the second pressure regulating valve is fully closed, and the first pressure regulating valve adjusts its opening degree according to the gas path pressure, at this time, the control gas in the gas conveying member can enter the intake valve through the first pressure regulating valve, adjust the opening degree of the intake valve, and the controller adjusts the engine speed according to the second mode parameter, so that the compressor exhaust pressure does not decrease but is also not greater than or equal to the automatic unloading pressure. In addition, the system also has an unloading control mode, when in the unloading control mode, the first switch valve is opened, the second switch valve is closed, and the first pressure regulating valve and the second pressure regulating valve are both fully closed, at this time, the control gas in the gas conveying member enters the intake valve through the first switch valve and pushes the intake valve cylinder to close, at this time, the compressor is unloaded, and the controller sends an idle speed to the engine ECU to control the engine to run at idle speed.

[0025] The drill double-gear control system can have two sets of control processes, two operating conditions, two different exhaust capacities, adapt to different drilling diameters, widen the use range, improve the work efficiency, reduce the work oil consumption, and improve the energy saving effect. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic view of a drill control system provided in the prior art;

[0027] Figure 2 is a structural schematic view of a drill double-gear control system provided by the utility model;

[0028] Figure 3It is the control switch and the structure diagram of controller part provided by the utility model.

[0029] In the drawing:

[0030] 1', switch valve; 2', pressure regulating valve; 3', oil-gas separator; 31', pressure sensor; 4', air inlet valve;

[0031] 1, first switch valve; 2, second switch valve; 3, first pressure regulating valve; 4, second pressure regulating valve; 5, air inlet valve; 61, first passage; 62, second passage; 63, third passage; 64, confluence pipe; 65, throttling hole; 7, oil-gas separator; 71, pressure sensor; 8, control switch; 9, controller; 10, air cleaner; 101, differential pressure indicator. DETAILED DESCRIPTION

[0032] The utility model will be described in further detail below in combination with the drawings and examples. It can be understood that the specific examples described herein are only used to explain the utility model and are not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all the structures.

[0033] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0034] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature in the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature in the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "lower", "lower" and "lower" of the first feature in the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0035] In the description of the present embodiment, the terms "upper", "lower", "right", and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.

[0036] The present embodiment provides a drilling rig double-grade control system. Referring to Figures 2 to 3 The drilling rig double-grade control system includes a gas supply member, a first switch valve 1, a second switch valve 2, a first pressure regulating valve 3, a second pressure regulating valve 4, and an air inlet valve 5. The air inlet end of the first switch valve 1 is connected to the gas supply member, the air outlet end of the first switch valve 1 is connected to the air inlet valve 5, the air inlet end of the first pressure regulating valve 3 is connected to the gas supply member, the air outlet end of the first pressure regulating valve 3 is connected to the air inlet valve 5, the air inlet end of the second switch valve 2 is connected to the gas supply member, the air outlet end of the second switch valve 2 is connected to the air inlet end of the second pressure regulating valve 4, and the air outlet end of the second pressure regulating valve 4 is connected to the air inlet valve 5.

[0037] The drilling rig double-grade control system has two sets of loading control and two sets of pressure maintaining control. They can be defined as a first loading control mode, a first pressure maintaining control mode, a second loading control mode, and a second pressure maintaining control mode, respectively. The first loading control mode and the first pressure maintaining control mode can correspond to a preset first mode parameter, and the second loading control mode and the second pressure maintaining control mode can correspond to a preset second mode parameter.

[0038] Exemplarily, when in the first loading control mode, the first switch valve 1 is closed, the second switch valve 2 is opened, and the first pressure regulating valve 3 and the second pressure regulating valve 4 are both fully closed, so that the control gas in the gas conveying member cannot reach the intake valve 5 and cannot push the intake valve 5 to close the cylinder, the compressor is loaded, and the engine speed is automatically adjusted according to the first mode parameter, so that the compressor exhaust capacity meets the gas amount and gas pressure required by the integrated downhole drill when working, and the engine runs at constant power. When in the second loading control mode, the first switch valve 1 is closed, the second switch valve 2 is closed, and the first pressure regulating valve 3 and the second pressure regulating valve 4 are both fully closed, so that the control gas in the gas conveying member cannot reach the intake valve 5 and cannot push the intake valve 5 to close the cylinder, the compressor is loaded, and the engine speed is automatically adjusted according to the second mode parameter, so that the compressor exhaust capacity meets the gas amount and gas pressure required by the integrated downhole drill when working, and the engine runs at constant power. When in the first pressure maintaining control mode, the first switch valve 1 is closed, the second switch valve 2 is opened, the first pressure regulating valve 3 is fully closed, and the second pressure regulating valve 4 adjusts its opening degree according to the gas path pressure, at this time, the control gas in the gas conveying member can enter the intake valve 5 through the second switch valve 2 and the second pressure regulating valve 4 in turn, adjust the opening degree of the intake valve 5, and the controller 9 adjusts the engine speed according to the first mode parameter, so that the compressor exhaust pressure does not decrease but is also not greater than or equal to the automatic unloading pressure. When in the second pressure maintaining control mode, the first switch valve 1 is closed, the second switch valve 2 is closed, the second pressure regulating valve 4 is fully closed, and the first pressure regulating valve 3 adjusts its opening degree according to the gas path pressure, at this time, the control gas in the gas conveying member can enter the intake valve 5 through the first pressure regulating valve 3, adjust the opening degree of the intake valve 5, and the controller 9 adjusts the engine speed according to the second mode parameter, so that the compressor exhaust pressure does not decrease but is also not greater than or equal to the automatic unloading pressure. In addition, the system also has an unloading control mode, when in the unloading control mode, the first switch valve 1 is opened, the second switch valve 2 is closed, and the first pressure regulating valve 3 and the second pressure regulating valve 4 are both fully closed, at this time, the control gas in the gas conveying member enters the intake valve 5 through the first switch valve 1 and pushes the intake valve 5 to close the cylinder, at this time, the compressor is unloaded, and the controller 9 sends an idle speed to the engine ECU to control the engine to run at idle speed.

[0039] The drill double-gear control system can have two sets of control processes, two operating conditions, two different exhaust capacities, adapt to different drilling diameters, widen the use range, improve the work efficiency, reduce the work oil consumption, and improve the energy saving effect.

[0040] In the embodiment, the gas conveying member includes an oil-gas separator 7, the gas inlet end of the first switch valve 1, the gas inlet end of the first pressure regulating valve 3, and the gas inlet end of the second switch valve 2 are all communicated with the oil-gas separator 7. In the embodiment, the control gas separated from the oil-gas separator 7 is used for external conveying.

[0041] In the embodiment, the oil-gas separator 7 is further provided with a pressure sensor 71. By arranging the pressure sensor 71, the internal pressure of the oil-gas separator 7 can be detected. In the embodiment, the drilling rig dual-grade control system further comprises a control switch 8 and a controller 9, the control switch 8, the pressure sensor 71, the first switch valve 1 and the second switch valve 2 are in communication connection with the controller 9, and the control switch 8 can control the opening and closing of the first switch valve 1 and the second switch valve 2 through the controller 9. Specifically, the first mode parameter and the second mode parameter can be preset in the controller 9. Specifically, the control switch 8 has a first loading position, a second loading position and an unloading position.

[0042] For example, when in the first loading control mode, the control switch 8 is dialled to the first loading position, the controller 9 controls the first switch valve 1 to close after receiving the first loading signal, controls the second switch valve 2 to open, and controls the engine speed according to the internal pressure signal of the oil-gas separator 7 received by the pressure sensor 71 and according to the first mode parameter to automatically adjust the engine speed, so that the compressor exhaust capacity meets the gas quantity and gas pressure required by the integrated down-the-hole drill when working, and the engine runs at constant power. When in the second loading control mode, the control switch 8 is dialled to the second loading position, the controller 9 controls the first switch valve 1 to close and the second switch valve 2 to close after receiving the second loading signal, and the controller 9 controls the engine speed according to the internal pressure signal of the oil-gas separator 7 received by the pressure sensor 71 and according to the second mode parameter to automatically adjust the engine speed, so that the compressor exhaust capacity meets the gas quantity and gas pressure required by the integrated down-the-hole drill when working, and the engine runs at constant power. When in the first pressure maintaining control mode, the control switch 8 remains in the first loading position, the controller 9 sends instructions to the engine ECU according to the first mode parameter to control the engine to run normally, and adjusts the engine speed according to the first mode parameter, so that the compressor exhaust pressure does not decrease but is also not greater than or equal to the automatic unloading pressure. When in the second pressure maintaining control mode, the control switch 8 remains in the second loading position, the controller 9 sends instructions to the engine ECU according to the second mode parameter to control the engine to run normally, and adjusts the engine speed according to the second mode parameter, so that the compressor exhaust pressure does not decrease but is also not greater than or equal to the automatic unloading pressure. When in the unloading control mode, the control switch 8 is dialled to the unloading position, the controller 9 controls the first switch valve 1 to open and the second switch valve 2 to close after receiving the unloading signal, and the controller 9 sends the idle speed to the engine ECU to control the engine to run at idle speed.

[0043] In the embodiment, the first switch valve 1 and the second switch valve 2 are both arranged as electromagnetic valves. Specifically, when the first switch valve 1 is arranged as an electromagnetic valve, the first switch valve 1 is configured as a normally open electromagnetic valve, that is, closed when powered on and opened when powered off. When the second switch valve 2 is arranged as an electromagnetic valve, the second switch valve 2 is configured as a normally closed electromagnetic valve, that is, opened when powered on and closed when powered off.

[0044] In the embodiment, the first pressure regulating valve 3 and the second pressure regulating valve 4 are both mechanical pressure regulating valves, and are controlled by external operation.

[0045] Specifically, the drilling rig double-grade control system comprises a first passage 61, a second passage 62 and a third passage 63. The first passage 61 is connected between the gas delivery member and the inlet valve 5, and the first switch valve 1 is arranged on the first passage 61. The first pressure regulating valve 3 is arranged on the second passage 62, the inlet end of the second passage 62 is connected to the first passage 61 between the gas delivery member and the inlet end of the first switch valve 1, and the outlet end of the second passage 62 is connected to the inlet valve 5. The second switch valve 2 and the second pressure regulating valve 4 are arranged on the third passage 63 in sequence, the inlet end of the third passage 63 is connected to the first passage 61 between the gas delivery member and the inlet end of the second passage 62, and the outlet end of the third passage 63 is connected to the inlet valve 5. Specifically, when in the first load control mode and the second load control mode, the first passage 61, the second passage 62 and the third passage 63 are all blocked, and the control gas in the gas delivery member cannot reach the inlet valve 5. When in the first pressure maintaining control mode, the first switch valve 1 is closed, the second switch valve 2 is opened, the first pressure regulating valve 3 is completely closed, and the second pressure regulating valve 4 adjusts its opening degree according to the pressure of the third passage 63. At this time, the third passage 63 is in a conductive state, and the control gas in the gas delivery member can enter the inlet valve 5 through the third passage 63. When in the second pressure maintaining control mode, the first switch valve 1 is closed, the second switch valve 2 is closed, the second pressure regulating valve 4 is completely closed, and the first pressure regulating valve 3 adjusts its opening degree according to the pressure of the second passage 62. At this time, the second passage 62 is in a conductive state, and the control gas in the gas delivery member can enter the inlet valve 5 through the second passage 62. When in the unload control mode, the first switch valve 1 is opened, the second switch valve 2 is closed, and the first pressure regulating valve 3 and the second pressure regulating valve 4 are both completely closed. At this time, the first passage 61 is in a conductive state, and the control gas in the gas delivery member can enter the inlet valve 5 through the first passage 61.

[0046] Further, the control gas inlet end of the inlet valve 5 is provided with a flow collecting pipe 64, and the outlet end of the first passage 61, the outlet end of the second passage 62 and the outlet end of the third passage 63 are all connected to the flow collecting pipe 64. Specifically, the first passage 61, the second passage 62 and the third passage 63 are all connected to the inlet end of the inlet valve 5 through the flow collecting pipe 64.

[0047] Specifically, the flow collecting pipe 64 is provided with a throttling hole 65 connected to the atmosphere. The throttling hole 65 is arranged to timely release the water vapor in the flow collecting pipe 64, so as to avoid the flow collecting pipe 64 from being blocked due to icing in a low temperature environment.

[0048] In the embodiment, the drilling rig double-stage control system further comprises an air filter 10 arranged at the air inlet end of the air inlet valve 5.

[0049] Further, a differential pressure indicator 101 is arranged on the air filter 10.

[0050] In summary, the drilling rig double-stage control system provided by the embodiment realizes unloading control and two loading controls through the control switch 8, the controller 9 judges and processes the received signals and performs corresponding control processing, the first switch valve 1 is configured as a normally open electromagnetic valve for loading control, the second switch valve 2 is configured as a normally closed electromagnetic valve for selecting pressure maintaining control air path, and two mechanical pressure regulating valves are used for controlling the opening degree of the air inlet valve 5 during loading pressure regulation and pressure maintaining, which is simple in operation, high in practicability, and better in energy saving effect. After two groups of different parameter settings are completed and debugging is completed, only the control switch 8 needs to be dialed to the corresponding position during loading and unloading, and the controller 9 will adjust the operation of the machine according to the received signals and the preset parameters, and the pressure regulating valve will also adjust the opening degree according to the pressure of the control air source. In terms of performance, the control signals of the controller 9 all adopt DI or DO signals, which have strong anti-interference ability and good stability. In terms of function, the control is stable and accurate, and can meet more caliber or various depth rock drilling working conditions, and has good energy saving effect.

[0051] Obviously, the above embodiment of the utility model is only for clear illustration of the utility model, and is not a limitation on the implementation mode of the utility model. For ordinary skilled persons in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the utility model. Here, it is unnecessary and impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A rig two-range control system, characterized by, The device comprises a gas conveying part, a first switch valve (1), a second switch valve (2), a first pressure regulating valve (3), a second pressure regulating valve (4) and an air inlet valve (5), wherein, The air inlet end of the first switch valve (1) is communicated with the gas conveying part, and the air outlet end of the first switch valve (1) is communicated with the air inlet valve (5); The air inlet end of the first pressure regulating valve (3) is communicated with the gas conveying part, and the air outlet end of the first pressure regulating valve (3) is communicated with the air inlet valve (5); The air inlet end of the second switch valve (2) is communicated with the gas conveying part, the air outlet end of the second switch valve (2) is communicated with the air inlet end of the second pressure regulating valve (4), and the air outlet end of the second pressure regulating valve (4) is communicated with the air inlet valve (5) The gas conveying part comprises an oil-gas separator (7), and the air inlet end of the first switch valve (1), the air inlet end of the first pressure regulating valve (3) and the air inlet end of the second switch valve (2) are all communicated with the oil-gas separator (7); The drill rig double-grade control system is further provided with a pressure sensor (71) on the oil-gas separator (7), and the pressure sensor (71) is used for detecting the internal gas pressure of the oil-gas separator (7); The drill rig double-grade control system further comprises a control switch (8) and a controller (9), the control switch (8), the pressure sensor (71), the first switch valve (1) and the second switch valve (2) are all in communication connection with the controller (9), and the control switch (8) can control the opening and closing of the first switch valve (1) and the second switch valve (2) through the controller (9); The controller (9) can adjust the rotating speed of the engine according to the internal gas pressure data of the oil-gas separator (7) detected by the pressure sensor (71) in the first mode parameter or the second mode parameter, so that the compressor exhaust volume meets the gas volume and gas pressure required by the integrated down-the-hole drill during operation, and the engine runs at constant power.

2. The rig two-range control system of claim 1, wherein, The device further comprises a first passage (61), a second passage (62) and a third passage (63), wherein, The first passage (61) is communicated between the gas conveying part and the air inlet valve (5), and the first switch valve (1) is arranged on the first passage (61); The first pressure regulating valve (3) is arranged on the second passage (62), the air inlet end of the second passage (62) is communicated with the first passage (61) between the gas conveying part and the air inlet end of the first switch valve (1), and the air outlet end of the second passage (62) is communicated with the air inlet valve (5); The second switch valve (2) and the second pressure regulating valve (4) are arranged on the third passage (63) in sequence, the air inlet end of the third passage (63) is communicated with the first passage (61) between the gas conveying part and the air inlet end of the second passage (62), and the air outlet end of the third passage (63) is communicated with the air inlet valve (5).

3. The rig two-range control system of claim 2, wherein, The control gas path air inlet end of the air inlet valve (5) is provided with a manifold (64), and the air outlet end of the first passage (61), the air outlet end of the second passage (62) and the air outlet end of the third passage (63) are all communicated with the manifold (64).

4. The rig two-range control system of claim 3, wherein, The manifold (64) is provided with a throttle hole (65) communicated with the outside atmosphere.

5. The rig two-range control system of claim 1, wherein, The first switch valve (1) and the second switch valve (2) are both electromagnetic valves.

6. The rig two-range control system of claim 1, wherein, The air filter (10) is arranged at the air inlet end of the air inlet valve (5).

7. The rig two-range control system of claim 6, wherein, The air filter (10) is further provided with a differential pressure indicator (101).

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