Collaborative pressure relief intelligent blowout prevention system for bottom drainage roadway drilling machine group

Abstract

The utility model relates to an intelligent blowout prevention system for cooperative pressure relief of a drilling machine group in a floor drainage roadway. The intelligent blowout prevention system comprises the drilling machine group, a gas monitoring module group, a blowout prevention device group, a control system, a communication module and a power supply system. The drilling machine group is composed of at least two drilling machines, each drilling machine is provided with a power device, a transmission device, a drilling rod and a drilling bit, and the gas monitoring module group is provided with a gas concentration sensor, a pressure sensor and a flow sensor. The blowout preventer group is provided with a gas collector, the control system is connected with each sensor and the executing mechanism through the communication module, and the power supply system independently supplies power to each component. During working, the high-precision gas sensor monitors gas data around a drill hole in real time, when the data is abnormal, the control system rapidly starts negative pressure suction, gas is guided into the dustproof chamber to be filtered and then discharged, safety accidents such as explosion caused by gas spraying holes are effectively prevented, and the safety of underground operating personnel is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal mine safety equipment, and specifically relates to a bottom drainage roadway drilling rig group cooperative pressure relief intelligent blowout prevention system based on hardware architecture. BACKGROUND

[0002] The gas blowout prevention device is a device for preventing a large amount of gas from leaking during the drilling process of a gas drainage hole in a coal mine, and is mainly used for gas and dust control in coal mine drilling engineering such as layer-penetrating drilling and bedding drilling, to realize efficient drilling while drilling. The bottom drainage roadway drilling rig gas blowout prevention device is an important safety equipment specially designed for coal mine bottom drainage roadway drilling operation, aiming to effectively control gas emission and prevent gas blowout accidents, and to ensure the safety of underground workers and the normal operation of equipment.

[0003] The existing device is equipped with a gas sensor that is obviously disturbed by temperature, humidity and other factors in a complex underground environment, and the monitoring data is prone to deviation, and the sensor range and actual gas emission range are often mismatched, resulting in inaccurate monitoring results that cannot accurately reflect the real gas situation, which brings uncertainty to the blowout decision. The traditional blowout prevention device is mainly used for single drilling rig and independent operation, and lacks effective communication and linkage mechanism between drilling rigs, so that unified gas monitoring and blowout control cannot be realized when multiple drilling rigs are working at the same time, and an uneven situation of over-control in some areas and under-control in other areas is prone to occur, resulting in low overall control efficiency.

[0004] In view of the obvious deficiencies of the existing bottom drainage roadway drilling rig gas blowout prevention device in monitoring accuracy, cooperative operation, negative pressure drainage effect and dust and drilling cuttings treatment, it is urgent to develop an intelligent blowout prevention system with multiple drilling rig cooperative control. UTILITY MODEL CONTENT

[0005] In view of the defects and problems of the prior art, the utility model provides a drilling rig group cooperative control system based on a physical connection architecture, which realizes real-time linkage of gas monitoring, drilling rig control and blowout prevention device through standardized hardware interface and modular signal transmission path.

[0006] The utility model discloses a kind of bottom extraction roadway drilling rig group collaborative pressure relief intelligent blowout preventer systems, comprising: drilling rig group, at least two drilling machines are formed, each drilling machine includes power device, transmission, drill rod and drill bit;Gas monitoring module group, including the gas concentration sensor, gas pressure sensor being set around drill hole, and the gas flow sensor being set on drill rod;Blowout preventer device group, including the gas collector being correspondingly installed at the drill hole of each drilling machine;Control system, with signal input end and multiple control signal output end;Communication module, including first communication unit, second communication unit and third communication unit;Power supply system, drilling rig group, gas monitoring module group, control system and blowout preventer device group are respectively connected by independent power supply line;Wherein, the signal output end of the gas concentration sensor, gas pressure sensor and gas flow sensor is connected the signal input end of control system by first communication unit;The first control signal output end of control system is connected the control input end of blowout preventer device group by second communication unit;The second control signal output end of control system is connected the control interface of drilling rig group by third communication unit.

[0007] Preferably, the gas concentration sensor and gas pressure sensor are arranged in an annular array around the drill hole orifice, and the gas flow sensor is fixed to the outer wall of the drill rod by a clamp type mounting structure.

[0008] Preferably, the concentration pressure detection mechanism further comprises a hollow cylinder, a plurality of hollow areas are uniformly arranged on the circumferential edge of the hollow cylinder, each hollow area is sleeved with a lining plate, the inner side wall of each lining plate is provided with the gas concentration sensor, the inner side wall of each hollow cylinder is provided with an embedding groove, and the gas pressure sensor is arranged in each embedding groove.

[0009] Preferably, the gas collector comprises a fixing ring and a sealing cover, the fixing ring is fixedly sleeved on the front end of the hollow cylinder, a plurality of air permeable holes are arranged on the circumference of the fixing ring, the sealing cover is sleeved on the outer side of the fixing ring, the inner wall of the front side of the sealing cover is provided with an annular groove, the annular groove is located on the outer side of each air permeable hole, the rear side of the sealing cover converges inward to form a converging portion, a plurality of fixing holes are arranged on the side wall of the converging portion, and the sealing cover, the fixing ring and the hollow cylinder can be fixed as a whole after the radial bolts are arranged in each fixing hole; the suction port is arranged on the side wall of the annular groove.

[0010] Preferably, an auxiliary lining plate is fixed on the bottom of the sealing cover, the port at the drill hole position is expanded, the concentration pressure detection mechanism is assembled in the expansion, the gas collector is left on the edge of the expansion, and the auxiliary lining plate is fixed on the side wall of the coal seam by an anchor rod.

[0011] Preferably, the negative pressure control system comprises a base, filter barrels and a negative pressure pump, a plurality of supports are fixed on the upper side of the base, a filter barrel is installed on each support, the upper ends of the plurality of filter barrels are simultaneously communicated with a suction main pipe, the front end of the suction main pipe is connected with a plurality of suction branch pipes, each suction branch pipe is connected to a suction port at each drilling position, one side of the bottom of each filter barrel is connected with a negative pressure pipe one, the negative pressure pipe one is connected to the inlet of a dustproof chamber, a plurality of filter screens are arranged in the dustproof chamber, and the mesh size of the filter screens gradually decreases from front to back, and the outlet of the dustproof chamber is communicated with the inlet of the negative pressure pump.

[0012] Preferably, the other side of the bottom of each filter barrel is connected with a negative pressure pipe two, and the negative pressure pipes two are communicated with the inlet of the negative pressure pump.

[0013] Preferably, the control system further comprises an audible and visual alarm, and a control end of the audible and visual alarm is connected with a third control signal output end of the control system.

[0014] The beneficial effects of the utility model are as follows:

[0015] 1. Significantly improve the safety performance: through the real-time monitoring of the gas concentration, pressure around the drilling hole and the gas flow in the drill pipe by the high-precision gas sensor, once the data is abnormal, the control system starts negative pressure suction immediately, and the gas is discharged after being filtered into the dustproof chamber, which effectively prevents the explosion and other safety accidents caused by gas jetting hole, and builds a strong safety line for underground operation personnel.

[0016] 2. Realize efficient collaborative operation: the drilling rig group adopts unified interface specifications and communication protocols, cooperates with a multi-level hardware connection system, achieves multi-drilling rig synchronous operation and precise regulation and control, optimizes the gas extraction efficiency, and adapts to the gas extraction demand under complex geological conditions.

[0017] 3. Enhance the environmental adaptability and reliability of the system: the communication module combines CAN bus and industrial Ethernet, and selects anti-interference communication medium to ensure stable signal transmission in the harsh underground environment; the multi-path power supply design and protection device of the explosion-proof power supply box ensure the continuous and stable operation of the system in the flammable and explosive place.

[0018] 4. Optimize dust and drill cuttings treatment: the negative pressure control system is filtered and settled in the dustproof chamber through multiple stages, effectively collects drill cuttings and dust, prevents them from escaping and splashing, improves the air quality underground, reduces the harm of dust, avoids blocking the gas extraction channel, and ensures the stable operation of the system. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the block diagram of the collaborative pressure relief intelligent blowout prevention system of the utility model;

[0020] Figure 2 is Figure 1 the topological structure diagram of the system;

[0021] Figure 3 is a mechanical structure detail view of the blowout prevention system;

[0022] Figure 4 is an assembly relationship schematic view of the concentration pressure detection mechanism and the gas collector.

[0023] Figure label: concentration pressure detection mechanism 1; gas collector 2; negative pressure control system 3; drill pipe 4; gas flow sensor 5; hollow cylinder 11; hollow area 12; lining plate 13; gas concentration sensor 14; gas pressure sensor 15; fixed ring 21; air hole 22; sealing cover 23; annular groove 24; fixed hole 25; suction port 26; auxiliary plate 27; base 31; filter barrel 32; suction main pipe 33; suction branch pipe 34; negative pressure pipe one 35; negative pressure pipe two 36; dustproof chamber 37; negative pressure pump 38; explosion-proof power supply box 39. DETAILED DESCRIPTION

[0024] The utility model is further illustrated below in combination with the drawings and examples.

[0025] Example 1: a bottom suction roadway drilling machine group cooperative pressure relief intelligent blowout prevention system, including a drilling machine group, a gas monitoring module group, a blowout prevention device group, a blowout prevention device group, a negative pressure control system, a control system communication module and a power supply system, etc., by constructing a multi-level hardware connection system, the physical cooperation of the drilling machine group, the monitoring unit and the actuator is realized.

[0026] Specifically, the drilling machine group is formed by at least two drilling machines, each drilling machine includes a power device, a transmission device, a drill pipe and a drill bit. For example, the drilling machine group includes at least two drilling machines (Z1-Zn) with the same interface specification, each drilling machine includes: a variable frequency motor with a rated power of 37kW and an input voltage of 380V, a reduction gearbox with a transmission ratio of 1:50, an output shaft connected with a drill pipe (L1-Ln) flange, an RS485 standard control interface (J1-Jn) with interface pin definition conforming to the Modbus protocol.

[0027] The gas monitoring module includes a gas concentration sensor 14 and a gas pressure sensor 15 installed around the borehole, and a gas flow sensor 5 installed on the drill pipe. The gas concentration sensors (S1-Sn), model GJC4, have a range of 0-100%VOL; the gas pressure sensors (P1-Pn), model GYD10, have a range of 0-10MPa; and the ring-shaped mounting bracket has an adjustable diameter of Φ100-200mm. The drill pipe monitoring unit includes gas flow sensors (F1-Fn), model LWGY-25, with a range of 0-30m³ / min, a stainless steel clamp fixing structure, and a high-temperature resistant rubber lining. The gas concentration and gas pressure sensors are arranged in a ring array around the borehole opening, and the gas flow sensor is fixed to the outer wall of the drill pipe via a clamp mounting structure. The blowout preventer group includes gas collectors 2 installed at each borehole location on the drilling rig.

[0028] like Figure 4 As shown, a type of gas collector 2 includes a fixing ring 21, vent holes 22, a sealing cover 23, an annular groove 24, fixing holes 25, a suction port 26, and an auxiliary fixing plate 27. The fixing ring 21 is fixedly fitted to the front end of the hollow cylinder 11. A series of vent holes 22 are provided on the circumference of the fixing ring 21. The sealing cover 23 is fitted on the outside of the fixing ring 21. An annular groove 24 is provided on the inner front wall of the sealing cover 23, located outside each vent hole 22. The rear side of the sealing cover 23 converges inward to form a converging part. A series of fixing holes 25 are provided on the side wall of the converging part. After a radial bolt is installed in each fixing hole 25, the sealing cover 23, the fixing ring 21, and the hollow cylinder 11 can be fixed as a whole. A suction port 26 is provided on the side wall of the annular groove 24, and an auxiliary fixing plate 27 is fixed at the bottom of the sealing cover 23.

[0029] A flared opening is set at the port of the borehole, the concentration pressure detection mechanism 1 is assembled inside the flared opening, the gas collector 2 is left at the edge of the flared opening, and the auxiliary fixing plate 27 is fixed to the side wall of the coal seam by anchor bolts.

[0030] The control system has a signal input terminal and multiple control signal output terminals; the communication module includes a first communication unit, a second communication unit, and a third communication unit; the power supply system is connected to the drilling rig group, the gas monitoring module group, the control system, and the blowout preventer group via independent power supply lines; wherein, the signal output terminals of the gas concentration sensor, the gas pressure sensor, and the gas flow sensor are connected to the signal input terminal of the control system via the first communication unit; the first control signal output terminal of the control system is connected to the control input terminal of the blowout preventer group via the second communication unit; and the second control signal output terminal of the control system is connected to the control interface of the drilling rig group via the third communication unit.

[0031] The gas monitoring module group includes a concentration and pressure detection mechanism 1 and a gas flow sensor 5, wherein, for example, Figure 4 As shown, the concentration and pressure detection mechanism 1 includes a hollow cylinder 11, hollow areas 12, a liner 13, a gas concentration sensor 14, and a gas pressure sensor 15. Multiple hollow areas 12 are evenly distributed along the circumferential edge of the hollow cylinder 11. Each hollow area 12 is fitted with a liner 13. A gas concentration sensor 14 is installed on the inner wall of each liner 13. A groove is provided on the inner wall of each hollow cylinder 11, and a gas pressure sensor 15 is installed in each groove.

[0032] like Figure 3 As shown, the negative pressure control system 3 includes a base 31, a filter barrel 32, a main suction pipe 33, a branch suction pipe 34, a negative pressure pipe 1 35, a negative pressure pipe 2 36, a dustproof chamber 37, a negative pressure pump 38, and an explosion-proof power supply box 39.

[0033] Multiple brackets are fixed on the upper side of the base 31, and a filter canister 32 is installed on each bracket. The upper ends of the multiple filter canisters 32 are simultaneously connected to a main suction pipe 33. The front end of the main suction pipe 33 is connected to multiple suction branch pipes 34. Each suction branch pipe 34 is connected to a suction port 26 at each drilling position. One side of the bottom of each filter canister 32 is connected to a negative pressure pipe 35, and the other side is connected to a negative pressure pipe 36. The negative pressure pipe 35 is connected to the inlet of the dustproof chamber 37. Multiple filter screens are installed in the dustproof chamber 37, and the mesh size of the filter screens decreases from front to back. The negative pressure pipes 36 are connected to the inlet of the negative pressure pump 38, and the outlet of the dustproof chamber 37 is connected to the inlet of the negative pressure pump 38. An explosion-proof power supply box 39 and a control system are fixedly installed on the base 31. Simultaneously, a gas flow sensor 5 is installed at the front or middle of the drill rod 4. When the control system starts and enters the working mode, it simultaneously detects the signals from the gas concentration sensor 14, gas pressure sensor 15, and gas flow sensor 5 at each drilling position of the drilling rig. Based on the detected signals, when the signal threshold is reached, the control system controls the negative pressure pump 38 to generate negative pressure in each gas collector 2, thereby causing the gas at the borehole port to be drawn in by negative pressure, filtered, and discharged to the outside, achieving the purpose of blowout prevention. When blowouts or abnormal outbursts of harmful and toxic gases occur during gas drainage drilling, under the negative pressure extraction action of the negative pressure control system, the gas is drawn into the dust chamber through the gas collector. Drill cuttings and dust flow into the slag discharge pipe (located at the bottom or side of the dust chamber) after multiple collisions in the dust chamber. The slag discharge port is opened periodically or at set times to allow the slag to flow out, effectively preventing dust dispersion and drill cuttings splashing.

[0034] The communication module's sensor communication layer uses a CAN bus transceiver (model MCP2551) with a baud rate of 250kbps and twisted-pair shielded cable (RVVP 2×1.5mm²). The control communication layer uses an industrial Ethernet switch (model IES308) supporting the IEEE 802.3 protocol and armored optical cable (GYTA-4B1) with a transmission distance ≥2km. The power supply system can use an explosion-proof power supply box (model BXM51-16), including: main power input: AC660V / 50Hz; drilling rig power supply circuit: AC380V with a phase loss protection relay; sensor power supply circuit: DC24V with a ripple coefficient <1%; control circuit: DC12V with parallel TVS transient suppression diodes.

[0035] like Figure 1 and Figure 2 The system structure block diagram shown illustrates the physical connections of each module as follows: the gas concentration sensors (S1-Sn) and gas pressure sensors (P1-Pn) are connected to the analog input terminals (AI1-AIn) of the control system signal conditioning board via a CAN bus transceiver; the gas flow sensors (F1-Fn) are connected to the digital input terminals of the control system via an RS485 bus; the DO1-DOn terminals of the control system relay output board are connected to the solenoid valve coil of the negative pressure control system 3 via an industrial Ethernet switch; the output terminal of the control system is connected to the speed setting terminal of the drilling rig frequency converter via an optocoupler isolation circuit; and each power supply branch is powered separately via an explosion-proof junction box.

[0036] When the above system is put into use after commissioning, the drilling and gas monitoring process is as follows:

[0037] 1. Drilling Rig Start-up and Drilling Operation: The operator sends a start command through the control system. The control system sends control signals to the drilling rig group according to preset drilling parameters (such as drilling depth, drilling angle, drilling speed, etc.). The variable frequency motor of the drilling rig starts running, driving the drill rod and drill bit to rotate through the gearbox, thus initiating the drilling operation. The operating status of each drilling rig (such as motor current, speed, etc.) is fed back to the control system in real time through the RS485 control interface, allowing the operator to remotely monitor the operation of the drilling rig, promptly detect and handle potential faults, and ensure the smooth progress of drilling operations.

[0038] 2. Gas Monitoring and Early Warning: The control system analyzes and judges the monitoring data of gas concentration, pressure and flow rate in real time. When the monitoring data approaches or reaches the set early warning threshold, the system immediately issues an audible and visual alarm signal to remind on-site operators to pay attention to the gas outburst and take preventive measures in advance, such as reducing drilling speed and adjusting the drilling direction, in order to reduce the large outburst of gas, reduce the risk of blowout, and ensure construction safety.

[0039] Gas extraction and blowout prevention control stage:

[0040] 1. Negative Pressure Extraction Start-up and Gas Collection: When the gas concentration, pressure, or flow rate reaches the set start-up threshold, the control system quickly sends a control signal to the solenoid valve of the negative pressure control system, opening the solenoid valve and starting the negative pressure pump 38. The negative pressure pump generates negative pressure in the gas collector 2 through the suction main pipe 33 and suction branch pipes 34. The gas collected by the gas collector is sucked into the suction branch pipe 34 through the suction port 26, and then enters the suction main pipe 33. Under the action of negative pressure, the gas undergoes preliminary filtration through the filter barrel 32 to remove larger particulate impurities and dust, preventing impurities from entering the subsequent treatment system and causing blockage or damage, thereby improving the reliability and stability of the system.

[0041] 2. Multi-stage Filtration and Gas Treatment: After preliminary filtration, the gas enters the dust chamber 37 through the negative pressure pipe 35. Multiple layers of filters (with mesh sizes decreasing from front to back) within the dust chamber further filter and collect drill cuttings and dust from the gas. The gas undergoes multiple collisions and filtrations within the dust chamber, causing the drill cuttings and dust to gradually settle and flow into the slag discharge pipe. The slag discharge port is opened periodically or at set times to remove drill cuttings and dust from the system, preventing dust escape and drill cuttings splashing, reducing the impact of dust on downhole air quality, and also protecting equipment from dust corrosion and damage, extending the equipment's service life.

[0042] Construction completion and system recovery phase:

[0043] 1. Drilling Completion and Equipment Shutdown: Upon completion of drilling, the drilling rig automatically stops operating according to a preset program. The control system sends a stop command to the drilling rig group, the rig's variable frequency motor stops rotating, and the drill rod and drill bit stop drilling. Simultaneously, the control system determines whether to continue gas extraction based on real-time monitoring data of gas concentration, pressure, and flow rate. If the gas emission has significantly decreased, the control system sends a stop command to the negative pressure control system, closing the solenoid valve and stopping the negative pressure pump. The entire gas extraction and blowout prevention system gradually returns to standby mode.

[0044] 2. Data Recording and Analysis: The control system records and stores gas monitoring data (such as gas concentration change curves, pressure change curves, and flow rate change curves), drilling rig operation data (such as drilling depth, drilling speed, and motor current), and negative pressure control system operation data (such as negative pressure values ​​and extraction rates) throughout the drilling process for subsequent data analysis and summarization. In-depth analysis of this data allows for the evaluation of gas outburst conditions, blowout prevention effectiveness, and system performance during the drilling operation. This provides strong data support for optimizing subsequent drilling plans, improving equipment, and enhancing safety management, continuously improving and refining gas extraction and blowout prevention technologies, and ultimately raising the level of safe production in coal mines.

[0045] 3. System Maintenance and Cleaning: After construction, clean and maintain equipment such as gas collectors, filter tanks, and dust chambers, removing gas impurities, dust, and drill cuttings. Check the equipment's sealing performance, the integrity of the filter screen, and the unobstructed flow of pipelines. Replace any damaged parts promptly to ensure the equipment can operate normally for the next use. Simultaneously, inspect and maintain equipment such as drilling rigs and sensors, cleaning coal dust and oil stains from equipment surfaces, checking the wear of mechanical parts, and lubricating any necessary components to ensure long-term stable operation and prepare for the next gas extraction drilling operation.

[0046] The specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within the protection scope of this utility model.

Claims

1. A collaborative pressure relief intelligent blowout prevention system for a bottom-extraction tunnel drilling rig group, characterized in that, include: A drilling rig group consists of at least two drilling rigs, each of which includes a power unit, a transmission unit, a drill rod, and a drill bit; The gas monitoring module includes a gas concentration sensor (14) and a gas pressure sensor (15) installed around the borehole, and a gas flow sensor (5) installed on the drill pipe. Blowout preventer assembly, including gas collectors (2) installed at the boreholes of each drilling rig. The control system has signal input terminals and multiple control signal output terminals; The communication module includes a first communication unit, a second communication unit, and a third communication unit; The power supply system is connected to the drilling rig group, gas monitoring module group, control system and blowout preventer group through independent power supply lines; The signal output terminals of the gas concentration sensor, gas pressure sensor, and gas flow sensor are connected to the signal input terminal of the control system through a first communication unit; the first control signal output terminal of the control system is connected to the control input terminal of the blowout preventer group through a second communication unit; and the second control signal output terminal of the control system is connected to the control interface of the drilling rig group through a third communication unit.

2. The intelligent blowout prevention system for coordinated pressure relief of bottom drainage tunnel drilling rigs according to claim 1, characterized in that: The gas concentration sensor and gas pressure sensor are arranged in a ring array around the borehole opening, and the gas flow sensor is fixed to the outer wall of the drill pipe by a clamp-type mounting structure.

3. The intelligent blowout prevention system for coordinated pressure relief of bottom drainage tunnel drilling rigs according to claim 1, characterized in that: It also includes a concentration pressure detection mechanism (1), which includes a hollow cylinder (11), and multiple hollow areas (12) are evenly distributed on the circumferential edge of the hollow cylinder (11). Each hollow area (12) is fitted with a fixed liner (13). The gas concentration sensor (14) is installed on the inner side wall of each liner (13). Each hollow cylinder (11) has a groove on its inner side wall, and the gas pressure sensor (15) is installed in each groove.

4. The intelligent blowout prevention system for coordinated pressure relief of bottom drainage tunnel drilling rigs according to claim 3, characterized in that: The gas collector (2) includes a fixing ring (21) and a sealing cover (23). The fixing ring (21) is fixedly fitted to the front end of the hollow cylinder (11). A series of vent holes (22) are provided on the circumference of the fixing ring (21). The sealing cover (23) is fitted on the outside of the fixing ring (21). An annular groove (24) is provided on the inner wall of the front side of the sealing cover (23). The annular groove (24) is located outside each vent hole (22). The rear side of the sealing cover (23) converges inward to form a convergence part. A series of fixing holes (25) are provided on the side wall of the convergence part. After a radial bolt is installed in each fixing hole (25), the sealing cover (23), the fixing ring (21) and the hollow cylinder (11) can be fixed together. A suction port (26) is provided on the side wall of the annular groove (24).

5. The intelligent blowout prevention system for coordinated pressure relief of bottom drainage tunnel drilling rigs according to claim 4, characterized in that: A fixing plate (27) is fixed at the bottom of the sealing cover (23), and a flared opening is set at the port of the drilling position. The concentration pressure detection mechanism (1) is assembled in the flared opening, and the gas collector (2) is left at the edge of the flared opening. The fixing plate (27) is fixed to the side wall of the coal seam by anchor rods.

6. The intelligent blowout prevention system for coordinated pressure relief of bottom drainage tunnel drilling rigs according to claim 4, characterized in that: It also includes a negative pressure control system, which includes a base (31), a filter barrel (32) and a negative pressure pump (38). Multiple brackets are fixed on the upper side of the base (31), and a filter barrel (32) is installed on each bracket. The upper ends of the multiple filter barrels (32) are connected to a suction main pipe (33). The front end of the suction main pipe (33) is connected to multiple suction branch pipes (34). Each suction branch pipe (34) is connected to the suction port (26) at each drilling position. A negative pressure pipe (35) is connected to one side of the bottom of each filter barrel (32). The negative pressure pipe (35) is connected to the inlet of the dustproof chamber (37). Multiple filter screens are installed in the dustproof chamber (37), and the mesh size of the filter screens decreases from front to back. The outlet of the dustproof chamber (37) is connected to the inlet of the negative pressure pump (38).

7. The intelligent blowout prevention system for coordinated pressure relief of drilling rigs in bottom drainage tunnels according to claim 6, characterized in that: Each filter canister (32) has a negative pressure pipe (36) connected to the other side of its bottom, and the negative pressure pipes (36) are connected to the inlet of the negative pressure pump (38).

8. The intelligent blowout prevention system for coordinated pressure relief of bottom drainage tunnel drilling rigs according to claim 1, characterized in that: The control system also includes an audible and visual alarm, the control terminal of which is connected to the third control signal output terminal of the control system.

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