A rock drill discharge hole blowing system and a construction method thereof

Abstract

This invention discloses a rock drill slag removal and blowhole system and its construction method. The system includes: a monitoring module, a judgment module, a main channel, a water channel, and a mixing channel. The monitoring module monitors the rock strata state and feeds back to the judgment module. The judgment module has a built-in threshold and compares the rock strata state with the threshold to determine the working state. The water channel and the mixing channel are connected in parallel to the input of the main channel, and the output of the main channel is connected to the drill bit. The water channel and / or the mixing channel are switched to connect to the main channel according to different working states. The method includes: monitoring the rock strata state to obtain a rock strata state signal value; comparing the rock strata state signal value with a first threshold and a second threshold to obtain three working states. Based on the monitoring of the detection module, the slag removal method can be automatically adjusted and switched according to different rock strata state signal values, exhibiting strong adaptability.

Description

Technical Field

[0001] This invention relates to the field of rock drill slag removal technology, specifically to a rock drill slag removal blowhole system and its construction method. Background Technology

[0002] In applications such as tunnel construction, water conservancy and hydropower construction, and mining construction where the drill-and-blast method is used, the application scope of engineering equipment such as rock drilling rigs is gradually expanding. Currently, in the working environment of tunnel drilling and mining rock drilling, water or air is typically used to cool the rock drill while simultaneously cleaning the borehole and removing slag.

[0003] Due to differences in rock strata conditions, the cleaning effects of different cleaning methods also vary: 1. In environments with poor rock strata (such as mudstone), direct water cleaning can lead to problems. Insufficient water volume can cause water and mud to mix and accumulate, clogging the borehole and making it difficult to load explosives. Excessive water volume may damage the surrounding rock, causing borehole collapse (the drilled hole is blocked by collapsed rock strata) or even the entire working face (rock surface) to collapse. 2. In environments with harder rock strata, direct air cleaning (which often increases water mixing and dust removal) can be less effective than water cleaning and may cause the drill bit to get stuck due to poor dust removal.

[0004] Existing technologies typically involve equipping the chassis with a water pump for pressurization, with water connected to the rock drill's cleaning port via pipelines as the cleaning medium. However, the water volume in existing technologies cannot be adjusted; only the flow can be controlled, making them unsuitable for environments with poor rock conditions.

[0005] Some existing technologies consider that water-based slag removal is not suitable for poor rock formations, so air is used for slag removal. This method has two main drawbacks. First, since water is not used, the heat dissipation needs to be reconfigured with air cooling, and dust removal needs to be considered. Second, air is less effective for slag removal in harder rock formations and can easily cause the drill to get stuck.

[0006] Based on on-site construction experience, water-based slag removal is more suitable for surrounding rock with good strata, while air-based slag removal is more suitable for surrounding rock with poor strata or open strata. However, the vast majority of existing rock drilling rigs use water as the cleaning medium, and only a very small number of models use air. There is currently no rock drilling rig slag removal system that can adapt to all surrounding rock conditions. Summary of the Invention

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art, thereby providing a rock drill slag discharge system that can automatically switch the slag discharge mode according to different surrounding rock conditions, specifically a rock drill slag discharge blowhole system.

[0008] This invention provides a rock drill slag removal and blowing hole system, comprising:

[0009] The system includes a monitoring module, a judgment module, a main path, a water path, and a mixed path. The monitoring module monitors the rock formation condition and feeds it back to the judgment module. The judgment module has a built-in threshold, and the rock formation condition is compared with the threshold to determine the working state. The water path and the mixed path are connected in parallel to the input of the main path, and the output of the main path is connected to the drill bit. The water path and / or the mixed path are switched to connect to the main path according to different working states.

[0010] Preferably, the monitoring module is a rock stratum state sensor, used to monitor the rock stratum state and feed back the rock stratum state signal value; the threshold includes a first threshold and a second threshold; the first threshold is less than the second threshold; the first threshold and the second threshold are used to compare with the rock stratum state signal value.

[0011] Preferably, the water circuit includes an inlet ball valve, a water pump, and a first electrically controlled valve; water is connected to the water pump via the inlet ball valve; one end of the first electrically controlled valve is connected to the water pump, and the other end is connected to the main circuit.

[0012] Preferably, the water circuit also includes a radiator and a third electrically controlled valve; the radiator is arranged between the inlet ball valve and the water pump, and water is connected to the water pump through the inlet ball valve and the radiator; the third electrically controlled valve is connected to the water pump and is used to discharge part of the water for heat dissipation.

[0013] Preferably, the mixing path includes an air path, a mixing water path, and a second solenoid valve; the air path and the mixing water path are connected in parallel to the input end of the second solenoid valve, and the output end of the second solenoid valve is connected in parallel to the input end of the main path via a cleaning circuit check valve; the cleaning circuit check valve is used to prevent water passing through the first solenoid valve from flowing back to the second solenoid valve.

[0014] Preferably, the air circuit includes a first air inlet valve, a second air inlet valve, and an air inlet check valve; the air circuit is used to connect air from an external air source to the air inlet check valve through the second air inlet valve, or to connect air from an internal air source to the air inlet check valve through the first air inlet valve.

[0015] The mixing circuit includes an inlet ball valve and an inlet check valve; the inlet ball valve is used to control the water flow from the water pump and deliver water to the inlet check valve.

[0016] Preferably, the air connected to the air intake check valve mixes with the water connected to the water intake check valve to form a first water vapor or a second water vapor, which is then connected to the second electrically controlled valve; the first water vapor is formed by mixing the air from the external air source connected to the air intake check valve with the water connected to the water intake check valve; the second water vapor is formed by mixing the air from the internal air source connected to the air intake check valve with the water connected to the water intake check valve; the water content of the second water vapor is less than the water content of the first water vapor.

[0017] Preferably, the working states include gas slag discharge, slag discharge and hole cleaning, and water slag discharge.

[0018] The condition for determining gas slag discharge operation is that the rock stratum state signal value is less than the first threshold; when in gas slag discharge operation state, the mixing road is connected to the main road;

[0019] The criteria for determining the slag discharge and hole cleaning operation are that the rock stratum state signal value is greater than the first threshold and less than the second threshold. When the slag discharge and hole cleaning operation is in progress, the water path is first connected to the main path, and then the mixed path is switched to the main path.

[0020] The condition for determining water discharge is that the rock stratum state signal value is greater than the second threshold; when in water discharge operation, the waterway is connected to the main road.

[0021] Preferably, it also includes a water removal module; the water removal module includes a water removal ball valve, a check valve and a ball valve; opening the check valve and the ball valve allows the internal air source to connect with the water pump and blow out the water in the water pump, and the blown-out water is discharged by the water removal ball valve.

[0022] This invention also provides a construction method for a rock drill slag removal and blowing hole system, comprising:

[0023] Monitor the state of the rock strata and obtain the rock strata state signal value;

[0024] The rock strata state signal value is compared with the first threshold and the second threshold to obtain three working states;

[0025] In the first working state, when the rock strata state signal value is less than the first threshold, the mixing path is used to mix water and gas from the external gas source to form the first water vapor, and the first water vapor is connected to the main path and discharged by the drill bit.

[0026] In the second working state, when the rock stratum state signal value is greater than the first threshold and less than the second threshold, water is first connected to the main route through the water path and discharged from the drill bit. Then, the mixing path is used to mix the water and the gas in the internal gas source to form a second water vapor, which is then connected to the main route and discharged from the drill bit.

[0027] In the third working state, when the rock strata status signal value is greater than the second threshold, water is connected to the main route via a water channel to be discharged from the drill bit.

[0028] Preferred,

[0029] The first working state is when the rock stratum state signal value is less than the first threshold, the gas slag discharge mode is activated.

[0030] Disconnect the first solenoid valve, connect the second solenoid valve, and partially open the third solenoid valve; connect the air from the external air source to the air inlet check valve via the second air inlet ball valve; connect a portion of water to the water inlet check valve via the water pump inlet block 19, the water pump, and the water inlet ball valve; mix the air from the external air source connected to the air inlet check valve with the water connected to the water inlet check valve to form the first water vapor; connect the first water vapor to the main line via the second solenoid valve, and then discharge it from the drill bit for air slag removal; the other portion of water is discharged through the third solenoid valve.

[0031] The second working state is when the rock stratum state signal value is greater than the first threshold and less than the second threshold, the slag discharge and hole cleaning mode is activated.

[0032] First, connect the first solenoid valve and disconnect the second and third solenoid valves; then connect the water to the main line via the water pump inlet block 19, the water pump, and the first solenoid valve, and then discharge it through the drill bit;

[0033] Then, disconnect the first solenoid valve, connect the second solenoid valve, and fully open the third solenoid valve; connect the air from the internal air source to the air inlet check valve via the first air inlet ball valve; connect a portion of water to the water inlet check valve via the water pump inlet block 19, the water pump, and the water inlet ball valve; mix the air from the internal air source connected to the air inlet check valve with the water connected to the water inlet check valve to form the second water vapor; connect the second water vapor to the main line via the second solenoid valve, and then discharge it from the drill bit for hole cleaning; discharge the other portion of water through the third solenoid valve.

[0034] The third working state is to start the water slag discharge mode when the rock stratum state signal value is greater than the second threshold.

[0035] Connect the first solenoid valve and disconnect the second and third solenoid valves; connect water to the main line via the water pump inlet block 19, the water pump, and the first solenoid valve, and then discharge it through the drill bit.

[0036] The technical solution of this invention has the following advantages: based on the monitoring of the detection module, the slag discharge method can be automatically adjusted and switched according to different rock stratum state signal values, which has strong adaptability. Attached Figure Description

[0037] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 This is a circuit diagram of a rock drill slag removal and blowing hole system in an embodiment of the present invention.

[0039] Figure 2 This is a flowchart illustrating the working process of a rock drill slag removal and blowing hole system in an embodiment of the present invention.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1-Rock stratum condition sensor; 2-Cleaning circuit check valve; 3-Second solenoid valve; 4-Water check valve; 5-Air inlet check valve; 6-Air discharge valve; 7-External air source; 8-First inlet ball valve; 9-Water ball valve; 10-First solenoid valve; 11-Internal air source; 12-Water removal check valve; 13-Pressure gauge; 14-Outlet water pressure sensor; 15-Water pump outlet block; 16-Water pump; 17-Inlet water pressure sensor; 18-First water removal ball valve; 19-Water pump inlet block; 20-Inlet ball valve; 21-Water filter; 22-Water circuit pressure reducing valve; 23-Radiator; 24-First water circuit safety valve; 25-Second water removal ball valve; 26-Second water circuit safety valve; 27-Third solenoid valve. Detailed Implementation

[0042] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0046] like Figure 1 As shown, this embodiment provides a rock drill slag removal and blowing hole system, which includes:

[0047] The system includes a monitoring module, a judgment module, a main path, a water path, and a mixed path. The monitoring module monitors the rock strata condition and feeds it back to the judgment module. The judgment module has a built-in threshold, and the rock strata condition is compared with the threshold to determine the working state. The water path and the mixed path are connected in parallel to the input end of the main path, and the output end of the main path is connected to the drill bit. The water path and / or the mixed path are switched to connect to the main path according to different working states.

[0048] The monitoring module is a rock stratum state sensor 1, which is used to monitor the rock stratum state and feed back the rock stratum state signal value; the threshold includes a first threshold and a second threshold; the first threshold is less than the second threshold; the first threshold and the second threshold are used to compare with the rock stratum state signal value.

[0049] By employing various slag removal methods and monitoring by rock stratum condition sensors, the system enables air slag removal for weak surrounding rock to prevent borehole collapse; water slag removal followed by a second water vapor process for cleaning the borehole (slag removal and borehole cleaning) to prevent silt blockage inside the borehole; and water slag removal for harder surrounding rock to improve work efficiency.

[0050] As a further improvement to this embodiment, the water circuit includes an inlet ball valve 20, a water filter 21, a water pressure reducing valve 22, a radiator 23, a water pump 16, and a first electrically controlled valve 10; water is connected to the water pump 16 via the inlet ball valve 20, the water filter 21, the water pressure reducing valve 22, and the radiator 23; one end of the first electrically controlled valve 10 is connected to the water pump 16, and the other end is connected to the main circuit; the water pump 16 is connected to a third electrically controlled valve 27, which is used to discharge some water for heat dissipation.

[0051] As a further improvement of this embodiment, the mixing path includes an air path, a mixing water path, and a second electrically controlled valve 3; the air path and the mixing water path are connected in parallel to the input end of the second electrically controlled valve 3, and the output end of the second electrically controlled valve 3 is connected in parallel to the water path and the input end of the main path through a cleaning circuit check valve 2; the cleaning circuit check valve 2 is used to prevent water passing through the first electrically controlled valve 10 from flowing back to the second electrically controlled valve 3.

[0052] Furthermore, the air path includes a first air inlet valve 8, a second air inlet valve 6, and an air inlet check valve 5; the air path is used to connect air from an external air source 7 to the air inlet check valve 5 through the second air inlet valve 6, or to connect air from an internal air source to the air inlet check valve 5 through the first air inlet valve 8.

[0053] The mixing water circuit includes an inlet ball valve 9 and an inlet check valve 4; the inlet ball valve 9 is used to control the water flow from the water pump 16 and to deliver water to the inlet check valve 4.

[0054] Furthermore, the air connected to the air intake check valve 5 mixes with the water connected to the water intake check valve 4 to form a first water vapor or a second water vapor, which is then connected to the second electrically controlled valve 3. The first water vapor is formed by mixing the air from the external air source 7 connected to the air intake check valve 5 with the water connected to the water intake check valve 4. The second water vapor is formed by mixing the air from the internal air source connected to the air intake check valve 5 with the water connected to the water intake check valve 4. The water content of the second water vapor is less than that of the first water vapor.

[0055] In this embodiment, the working states include gas slag discharge, slag discharge and hole cleaning, and water slag discharge.

[0056] The condition for determining the operation of gas slag discharge is that the rock stratum state signal value is less than the first threshold; when in the gas slag discharge operation state, the mixing road is connected to the main road;

[0057] The criteria for determining the slag discharge and hole cleaning operation are that the rock stratum state signal value is greater than the first threshold and less than the second threshold; when in the slag discharge and hole cleaning operation state, the water path is first connected to the main path, and then the mixed path is switched to connect to the main path.

[0058] The condition for determining the operation of water slag discharge is that the rock stratum state signal value is greater than the second threshold; when in the water slag discharge operation state, the waterway is connected to the main road.

[0059] Specifically, in the water-discharge operation mode, the working components include a first electrically controlled valve 10, a water pump 16, a water pump outlet block 15, and a water pump inlet block 19. One side of the water pump 16 is connected to a water source via the water pump inlet block 19, and the other side of the water pump 16 is connected to the rock drill's water circuit via the water pump outlet block 15 and the first electrically controlled valve 10. The other side of the rock drill's water circuit is connected to the drill bit. Water is introduced into the water pump 16 through the water pump inlet block 19; the water introduced into the water pump 16 is further introduced into the rock drill's water circuit via the water pump outlet block 15 and the first electrically controlled valve 10, and finally discharged through the drill bit, thus achieving water-discharge of slag.

[0060] When in the air-discharge working state, the working components include the second solenoid valve 3, the third solenoid valve 27, the air-discharge valve 6, the air inlet check valve 5, the water ball valve 9, the water check valve 4, the water pump inlet block 19, the water pump 16, the water pump outlet block 15, and the cleaning circuit check valve 2. The air inlet check valve 5 is connected to the external air source 7 through the air-discharge valve 6. In the air-discharge module, the air inlet check valve 5 is used to connect the external air into the system. The third solenoid valve 27 is opened according to the setting. At this time, the water check valve 4 is connected to the water source through the water ball valve 9, the water pump outlet block 15, the water pump 16, and the water pump inlet block 19 in sequence. The water check valve 4 is used to connect a small amount of water into the system. The external air connected to the system is mixed with the water connected to the system to form the first water vapor. The water vapor is connected to the rock drill water circuit through the second solenoid valve 3 and the cleaning circuit check valve 2. The other side of the rock drill water circuit is connected to the drill bit and finally discharged through the drill bit. Excess water is discharged by partially opening the third electrically controlled valve 27 to meet heat dissipation requirements. Specifically, the water ball valve 9 is only partially opened as configured to limit flow and prevent excessive water, allowing only a small amount of water to be connected for dust removal.

[0061] When in the slag removal and hole cleaning working state, the working components include a first solenoid valve 10, a second solenoid valve 3, a third solenoid valve 27, a water pump inlet block 19, a water pump 16, a water pump outlet block 15, an internal air source 11, a first inlet ball valve 8, an air inlet check valve 5, a water ball valve 9, a water check valve 4, and a cleaning circuit check valve 2; one side of the first solenoid valve 10 is connected to the water source through the water pump outlet block 15, the water pump 16, and the water pump inlet block 19 in sequence, and the other side of the first solenoid valve 10 is connected to the rock drill water circuit for water slag removal. The air source from the self-contained air compressor is connected to the system through the internal air source 11, the first air inlet valve 8, and the air inlet check valve 5. In the slag removal and hole cleaning module, the air inlet check valve 5 is used to connect the air from the self-contained air compressor to the system. Water is sequentially connected to the water pump outlet block 15 through the water pump inlet block 19 and the water pump 16. Most of the water is discharged through the third solenoid valve 27, and the remaining water is connected to the system through the water ball valve 9 and the water check valve 4. The air from the self-contained air compressor connected to the system is mixed with the remaining water to form a second water vapor. The second water vapor is connected to the rock drill water circuit through the second solenoid valve 3 and the cleaning circuit check valve 2. The other side of the rock drill water circuit is connected to the drill bit, and the water vapor is finally discharged through the drill bit. By controlling the opening and closing of the first solenoid valve 10, the second solenoid valve 3, and the third solenoid valve 27, the effect of first water slag removal followed by second water vapor hole cleaning is achieved. The water content of the second water vapor is less than that of the first water vapor. The amount of water discharged through the third electrically controlled valve 27 can be set and controlled according to the actual situation.

[0062] In this embodiment, the system further includes a water removal module; the water removal module includes an air compressor, an internal air source 11, a water removal ball valve 25, a water removal check valve 12, and a first water removal ball valve 18; opening the water removal check valve 12 and the first water removal ball valve 18 allows the air compressor and the internal air source 11 to connect with the water pump 16 and blow out the water in the water pump 16. The blown water passes through the rock drill water circuit and is finally discharged through the drill bit; after the drill bit completes the drainage, the first water removal ball valve 18 is closed and the water removal ball valve 25 is opened to discharge the residual water in the water pump inlet block 19, preventing water in the system from freezing and damaging the water pump 16 and water pipes when the temperature is too low.

[0063] In this embodiment, an overflow module is also included; the overflow module includes a first water circuit safety valve 24 and a second water circuit safety valve 26; one end of the first water circuit safety valve 24 is connected to the output end of the radiator 23, and the other end is connected to the water pump 16; one end of the second water circuit safety valve 26 is connected to the water pump 16, and the other end is connected to the third electrically controlled valve 27; the first water circuit safety valve 24 and the second water circuit safety valve 26 are used to automatically open the drainage when the water pressure is too high and reaches the set pressure value, so as to protect the water circuit components from damage.

[0064] In this embodiment, the system further includes a pressure detection module, which includes an inlet pressure sensor 17 and an outlet pressure sensor 14. The inlet pressure sensor 17 is disposed in the water pump inlet block 19 and is used to detect the inlet pressure of the water pump 16. The outlet pressure sensor 14 is disposed in the water pump outlet block 15 and is used to detect the outlet pressure of the water pump 16. The water pump outlet block 15 also includes a pressure gauge 13, which is used to view the outlet pressure of the water pump 16.

[0065] This embodiment also provides a construction method for a rock drill slag removal and blowing hole system, including:

[0066] In the initial state, DT402 is energized, and the first solenoid valve 10 is connected; DT401 and DT403 are not energized, and the second solenoid valve 3 and the third solenoid valve 27 are disconnected. At this time, the medium in the rock drill water circuit is water, and a large amount of water is discharged from the drill bit position.

[0067] When the rock drill starts working, it will be in hole-opening mode for the first few seconds, and then it will enter drilling mode after a few seconds.

[0068] like Figure 2 As shown,

[0069] Monitor the state of the rock strata to obtain rock strata state signal values; set a first threshold and a second threshold;

[0070] The rock strata state signal value is compared with the first threshold and the second threshold to obtain three working states;

[0071] When the feedback value (rock strata state signal value) is lower than the first threshold, the air-discharge mode is activated. Upon entering drilling mode, DT401 is energized, the second solenoid valve 3 is connected, DT402 is de-energized, the first solenoid valve 10 is disconnected, DT403 is energized, and the third solenoid valve 27 opens according to the system settings. At this time, air from the external air source 7 is connected to the air inlet check valve 5 via the second air inlet ball valve 6; a portion of water is connected to the water inlet check valve 4 via the water pump inlet block 19, water pump 16, and water inlet ball valve 9; the air from the external air source 7 connected to the air inlet check valve 5 is mixed with the water connected to the water inlet check valve 4 to form the first water vapor; the first water vapor is connected to the main circuit via the second solenoid valve 3 and then discharged by the drill bit for air-discharge; the remaining water is discharged by the third solenoid valve 27. When the drilling depth reaches the predetermined value, impact and propulsion are stopped, rotation is maintained, and air-discharge stops after the preset time. Finally, the rock drill is pulled back to complete the drilling operation. The inlet ball valve 9 is pre-set to open only partially to limit the flow and prevent excessive dust removal water. Simultaneously, the third solenoid valve 27 opens, allowing excess water to be discharged to meet heat dissipation requirements. In the air-driven slag removal module, only a small amount of water is connected to the cleaning circuit for dust removal, ensuring both dust removal and heat dissipation. This slag removal mode is suitable for mudstone and other rock formations with low hardness, preventing borehole collapse or even face subsidence caused by water flushing.

[0072] When the feedback value is higher than the first threshold but lower than the second threshold, the slag removal and hole cleaning mode is activated. Upon entering drilling mode, DT402 is energized, the first solenoid valve 10 is connected, DT401 and DT403 are de-energized, and the second solenoid valve 3 and the third solenoid valve 27 are disconnected. At this time, water is connected to the main pipeline via the water pump inlet block 19, the water pump 16, and the first solenoid valve 10, and then discharged by the drill bit for slag removal and cleaning. When the borehole reaches the preset depth, drilling does not continue, nor does it retract directly, thus preventing the generation of gravel or other debris from the borehole. At this time, DT402 is de-energized, DT401 and DT403 are energized, and the second solenoid valve 3 and the third solenoid valve 27 are fully opened. At this time, the air in the internal air source 11 is connected to the air inlet check valve 5 through the first air inlet ball valve 8; a portion of water is connected to the water inlet check valve 4 through the water pump inlet block 19, water pump 16 and water inlet ball valve 9; the air in the internal air source 11 connected to the air inlet check valve 5 is mixed with the water connected to the water inlet check valve 4 to form the second water vapor; the second water vapor is connected to the main line through the second electric control valve 3, and then discharged by the drill bit for hole cleaning; the other portion of water is discharged by the third electric control valve 27. In the hole-cleaning mode, the water pump booster function is turned off. Since water pump 16 stops working, the water pressure in water pump 16 drops to the water pressure at water pump inlet 19. Most of the water is discharged through the third electric control valve 27. A very small amount of water is mixed with air from the built-in air compressor via water pump outlet block 15, water ball valve 9, and water check valve 4, and then connected to the rock drill's water circuit via internal air source 11, first air inlet ball valve 8, and air inlet check valve 5. A second water-air mixture, with a relatively lower water content than air-discharged slag, is then discharged from the drill bit for hole cleaning. After a few seconds of cleaning, the drill returns to its initial position before drilling. This slag-discharge and hole-cleaning module is suitable for rock formations with slightly higher hardness or those containing mudstone. The main purpose of using a second water-air mixture with a relatively lower water content than air-discharged slag is to blow out water and silt that may form in the hole during slag discharge, preventing blockage.

[0073] When the feedback value exceeds the second threshold, the water-based slag removal mode is activated. Upon entering drilling mode, DT402 is energized, the first solenoid valve 10 is connected, DT401 and DT403 are de-energized, and the second solenoid valve 3 and the third solenoid valve 27 are disconnected. At this time, the first solenoid valve 10 is connected, while the second solenoid valve 3 and the third solenoid valve 27 are disconnected. Water is introduced into the main pipeline via the water pump inlet block 19, the water pump 16, and the first solenoid valve 10, and then discharged by the drill bit for water-based slag removal. In this case, after drilling reaches the preset depth, the drill retracts directly without using the second water-air cleaning method. Finally, the rock drill is pulled back to complete the drilling operation. This slag removal module is suitable for situations with high rock hardness and good drilling conditions. After drilling, the hole position is stable, making it less prone to collapse or blockage.

[0074] The air discharge valve 6 and the first air inlet valve 8 are mainly used to switch the air source. When air discharge is performed, the air discharge valve 6 is opened and the first air inlet valve 8 is closed to use external air supply. When the second water vapor is used to clean the hole, the first air inlet valve 8 is opened and the air discharge valve 6 is closed to use the built-in air compressor to supply air.

[0075] Since the built-in air compressor is insufficient to provide a high-pressure air source for extended periods, it cannot meet the demand for long-term exhaust and slag removal, but it can meet the needs for short-term hole cleaning. When external air connection is inconvenient and slag removal is not required, the air source provided by the built-in air compressor can be used to achieve a second water vapor hole cleaning. However, if the built-in air compressor is large enough, it is possible to use only the built-in air compressor without external air source 7; alternatively, it is possible to use only external air source 7 without the built-in air compressor.

[0076] The water ball valve 9 is used to regulate the amount of water mixed during air discharge or hole cleaning, and the water flow is limited by the water ball valve 9.

[0077] Water check valve 4 is used to prevent backflow of air in air inlet check valve 5 or second solenoid valve 3 from causing damage to components; air inlet check valve 5 is used to prevent backflow of water in water check valve 4 or second solenoid valve 3 from causing damage to components; water removal check valve 12 is used to prevent backflow of water in water pump inlet block 19 from causing damage to components.

[0078] The cleaning circuit check valve 2 is used to prevent water in the first solenoid valve 10 from flowing back into the second solenoid valve 3. At the same time, it reduces the water content in the pipeline between the cleaning circuit check valve 2 and the second solenoid valve 3, and shortens the time interval between the water and steam discharged from the drill bit when the first steam is started for air slag discharge or the second steam is used for hole cleaning.

[0079] In this embodiment, all electrically controlled valves can be replaced with manual valves, and the slag discharge method can be manually adjusted by monitoring the rock strata status signal.

[0080] In this embodiment, the air discharge valve 6 or the first air inlet valve 8 can be removed, and an external air source or an internal air source can be used alone for air discharge. However, this requires an increased air compressor.

[0081] In this embodiment, a small water pump is added to the slag discharge system to control a small amount of water (for dust removal), and a ball valve is added to the radiator outlet to connect to the water tank for heat dissipation. At this time, the water pump 16 is not started.

[0082] The rock drill slag removal and blowing hole system provided in this embodiment has the following advantages compared with the prior art:

[0083] 1. With the addition of water and air slag removal modules, and the ability to automatically adjust and switch slag removal methods according to rock strata conditions, it is highly adaptable;

[0084] 2. Preset parameters: Based on the rock stratum state signals monitored by the rock stratum state sensor, control the valve opening and closing to switch between different slag discharge methods;

[0085] 3. Through various slag removal methods and monitoring by rock stratum condition sensors, gas slag removal in soft surrounding rock is used to prevent borehole collapse; water slag removal in medium or interlayered surrounding rock is followed by water vapor for borehole cleaning (slag removal and borehole cleaning) to prevent silt blockage inside the borehole; and water slag removal in harder surrounding rock improves work efficiency.

[0086] 4. Control the ratio of water used for system heat dissipation to water used for slag removal by controlling the opening and closing of valves, so as to achieve the most suitable slag removal and hole cleaning effect.

[0087] 5. In this embodiment, water-based slag removal and gas-based slag removal are configured in the same equipment, without significantly increasing costs;

[0088] 6. By matching different slag removal methods to different rock strata, we can ensure that the holes are basically unblocked after drilling, saving time in cleaning the holes and greatly improving the efficiency of subsequent charging.

[0089] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A rock drill slag removal and blowing hole system, characterized in that, include: The system includes a monitoring module, a judgment module, a main channel, a water channel, and a mixed channel; the monitoring module is used to monitor the state of the rock strata and feed back the data to the judgment module. The monitoring module is a rock stratum state sensor (1), used to monitor the rock stratum state and feed back the rock stratum state signal value; the judgment module has a threshold set inside, and compares the rock stratum state with the threshold to determine the working state; the threshold includes a first threshold and a second threshold; the first threshold is less than the second threshold; the first threshold and the second threshold are used to compare with the rock stratum state signal value; the water path and the mixing path are connected in parallel to the input end of the main path, and the output end of the main path is connected to the drill bit; the water path and / or the mixing path are switched to connect to the main path according to different working states; the working states include gas slag removal, slag removal and hole cleaning, and water slag removal. The condition for determining whether the gas-fired slag discharge is working is that the rock stratum state signal value is less than a first threshold. When in the gas slag discharge working state, connect the mixing road to the main road; The criteria for determining the slag discharge and hole cleaning operation are that the rock stratum state signal value is greater than the first threshold and less than the second threshold; when in the slag discharge and hole cleaning operation state, the water path is first connected to the main path, and then the mixed path is switched to connect to the main path. The condition for determining the operation of water slag discharge is that the rock stratum state signal value is greater than the second threshold; when in the water slag discharge operation state, the waterway is connected to the main road.

2. The rock drill slag removal and blowing system according to claim 1, characterized in that, The water circuit includes an inlet ball valve (20), a water pump (16), and a first electrically controlled valve (10); water is connected to the water pump (16) via the inlet ball valve (20); one end of the first electrically controlled valve (10) is connected to the water pump (16), and the other end is connected to the main circuit.

3. The rock drill slag removal and blowing system according to claim 2, characterized in that, The water circuit also includes a radiator (23) and a third solenoid valve (27); the radiator (23) is arranged between the inlet ball valve (20) and the water pump (16), and water is connected to the water pump (16) via the inlet ball valve (20) and the radiator (23); the third solenoid valve (27) is connected to the water pump (16), and the third solenoid valve (27) is used to discharge part of the water for heat dissipation.

4. The rock drill slag removal and blowing system according to claim 2, characterized in that, The mixing path includes an air path, a mixing water path, and a second solenoid valve (3); the air path and the mixing water path are connected in parallel to the input end of the second solenoid valve (3), and the output end of the second solenoid valve (3) is connected in parallel to the input end of the main path through the water path via a cleaning circuit check valve (2); the cleaning circuit check valve (2) is used to prevent water passing through the first solenoid valve (10) from flowing back to the second solenoid valve (3).

5. A rock drill slag removal and blowing system according to claim 4, characterized in that, The air path includes a first air inlet valve (8), a second air inlet valve (6), and an air inlet check valve (5); the air path is used to connect air from an external air source (7) to the air inlet check valve (5) through the second air inlet valve (6), or to connect air from an internal air source to the air inlet check valve (5) through the first air inlet valve (8); The mixing water circuit includes a ball valve (9) and an inlet check valve (4); the ball valve (9) is used to control the water flow from the water pump (16) and deliver water to the inlet check valve (4).

6. A rock drill slag removal and blowing system according to claim 5, characterized in that, The air connected to the air inlet check valve (5) mixes with the water connected to the water inlet check valve (4) to form a first water vapor or a second water vapor, and is connected to the second solenoid valve (3); the first water vapor is formed by mixing the air from the external air source (7) connected to the air inlet check valve (5) with the water connected to the water inlet check valve (4); the second water vapor is formed by mixing the air from the internal air source connected to the air inlet check valve (5) with the water connected to the water inlet check valve (4); the water content of the second water vapor is less than the water content of the first water vapor.

7. A rock drill slag removal and blowing system according to claim 5, characterized in that, It also includes a water removal module; the water removal module includes a water removal ball valve (25), a one-way valve (12) and a ball valve (18); the one-way valve (12) and the ball valve (18) are opened so that the internal air source is connected to the water pump (16) and blows out the water in the water pump (16), and the blown water is discharged by the water removal ball valve (25).

8. A construction method for a rock drill slag removal and blowing hole system according to any one of claims 2-7, characterized in that, include: Monitor the state of the rock strata and obtain the rock strata state signal value; The rock strata state signal value is compared with the first threshold and the second threshold to obtain three working states; In the first working state, when the rock stratum state signal value is less than the first threshold, the mixing path is used to mix water and gas in the external gas source (7) to form the first water vapor, and the first water vapor is connected to the main path and discharged by the drill bit; In the second working state, when the rock stratum state signal value is greater than the first threshold and less than the second threshold, water is first connected to the main route through the water path and discharged from the drill bit. Then, the mixing path is used to mix the water and the gas in the internal gas source to form a second water vapor, which is then connected to the main route and discharged from the drill bit. In the third working state, when the rock strata status signal value is greater than the second threshold, water is connected to the main route via a water channel to be discharged from the drill bit.

9. A construction method for a rock drill slag removal and blowing hole system according to claim 8, characterized in that, The first working state is when the rock stratum state signal value is less than the first threshold, the gas slag discharge mode is activated. Disconnect the first solenoid valve (10), connect the second solenoid valve (3), and partially open the third solenoid valve (27); connect the air from the external air source (7) to the air inlet check valve (5) via the second air inlet ball valve (6); connect a portion of water to the water inlet check valve (4) via the water pump inlet block (19), the water pump (16), and the water ball valve (9); mix the air from the external air source (7) connected to the air inlet check valve (5) with the water connected to the water inlet check valve (4) to form the first water vapor; connect the first water vapor to the main road via the second solenoid valve (3), and then discharge it from the drill bit for air slag removal; discharge the other portion of water through the third solenoid valve (27); The second working state is when the rock stratum state signal value is greater than the first threshold and less than the second threshold, the slag discharge and hole cleaning mode is activated. First, connect the first solenoid valve (10), disconnect the second solenoid valve (3) and the third solenoid valve (27); connect the water to the main line through the water pump inlet block (19), the water pump (16) and the first solenoid valve (10), and then discharge it through the drill bit; Then, disconnect the first solenoid valve (10), connect the second solenoid valve (3), and fully open the third solenoid valve (27); connect the air from the internal air source to the air inlet check valve (5) via the first air inlet ball valve (8); connect a portion of water to the water inlet check valve (4) via the water pump inlet block (19), the water pump (16), and the water ball valve (9); mix the air from the internal air source connected to the air inlet check valve (5) with the water connected to the water inlet check valve (4) to form the second water vapor; connect the second water vapor to the main line via the second solenoid valve (3), and then discharge it from the drill bit for hole cleaning; discharge the other portion of water from the third solenoid valve (27); The third working state is to start the water slag discharge mode when the rock stratum state signal value is greater than the second threshold. Connect the first solenoid valve (10), disconnect the second solenoid valve (3) and the third solenoid valve (27); connect the water to the main line through the water pump inlet block (19), the water pump (16) and the first solenoid valve (10), and then discharge it through the drill bit.

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