Tunnel construction gas extraction measuring device and method

Abstract

The invention relates to the field of tunnel construction, in particular to a tunnel construction gas extraction measuring device and method.The tunnel construction gas extraction measuring device comprises an extraction pump, an extraction pipe connected with the inlet end of the extraction pump, a sensor mechanism installed in the extraction pipe, a deposition box and a control center; the control center is used for receiving signals sent by the sensor mechanism, the outlet end of the extraction pump is communicated with the deposition box body through a discharge pipe, the deposition box body is connected with an air outlet pipe and a liquid discharge pipe, a filter screen is obliquely arranged in the deposition box body, and one end of the filter screen is hinged to the deposition box body; a slag discharging opening is formed in the lower side, close to the filter screen, of the deposition box body, a sealing plate is installed in the slag discharging opening, a cam is arranged in the deposition box body and makes contact with the bottom of the filter screen, and a driving mechanism used for driving the cam to rotate is installed in the deposition box body. The problem that the separation efficiency of a gas mixture in the deposition box is low is solved.

Description

Technical Field

[0001] The present invention relates to the field of tunnel construction, and in particular to a gas drainage measurement device and method for tunnel construction. Background Art

[0002] During the process of tunnel construction, if the tunnel passes through coal seams, oil shale or bituminous rock formations, and the surrounding rock is broken and jointed, gas may be encountered. In addition, vibrations and changes in in-situ stress during tunnel construction may also trigger coal extrusion or coal and gas outbursts, resulting in a large amount of gas release. A common gas drainage method is to drill holes in the tunnel rock wall and then place the drainage pipe in the hole to drain the gas.

[0003] In the related art, a gas drainage measurement device for tunnel construction includes a drainage pump, a drainage pipe, a sensor mechanism, a sedimentation box and a control center. The drainage pipe is connected to the inlet end of the drainage pump. The sensor mechanism is installed in the drainage pipe and includes a pressure sensor, a temperature sensor, a concentration sensor and a gas flow sensor. The pressure sensor is used to detect the mixed pressure of the gas mixture in the drainage pipe, the temperature sensor is used to detect the temperature of the gas mixture in the drainage pipe, the concentration sensor is used to detect the concentration of the gas in the drainage pipe, and the gas flow sensor is used to detect the total flow rate of the mixed gas in the drainage pipe. A first solenoid valve is provided in the drainage pipe. The control center is electrically connected to the drainage pump, the pressure sensor, the temperature sensor, the concentration sensor, the gas flow sensor and the first solenoid valve. The outlet end of the drainage pump is connected to the sedimentation box through a discharge pipe. A second solenoid valve is installed in the discharge pipe. The sedimentation box is connected to an external gas storage device through an outlet pipe and to an external liquid storage device through a drain pipe. A filter screen is inclined in the sedimentation box, and a slag discharge port for the filter to pass through is provided on the sedimentation box. The filter screen filters the extracted gas mixture. Water is discharged through the drain pipe, gas is discharged through the outlet pipe, and coal slag is discharged through the slag discharge port.

[0004] In view of the above related art, after the filter screen is used for a long time, coal slag is likely to block the filter screen. At this time, the staff needs to take out the filter screen from the sedimentation box to clean the filter screen, and the cleaning efficiency of the filter screen is low, resulting in a low separation efficiency of the gas mixture in the sedimentation box. Summary of the Invention

[0005] In order to solve the problem of low separation efficiency of the gas mixture in the sedimentation box, the present invention provides a gas drainage measurement device and method for tunnel construction.

[0006] In a first aspect, a gas drainage measurement device for tunnel construction provided by the present invention adopts the following technical solution: A gas drainage measurement device for tunnel construction, comprising a drainage pump, a drainage pipe connected to the inlet end of the drainage pump, a sensor mechanism installed in the drainage pipe, a sedimentation box body, and a control center. The control center is used to receive signals sent by the sensor mechanism. The outlet end of the drainage pump is communicated with the sedimentation box body through a discharge pipe. An air outlet pipe and a liquid discharge pipe are connected to the sedimentation box body. A filter screen is inclined in the sedimentation box body. One end of the filter screen is hinged to the sedimentation box body. A slag discharge port is opened on the side of the sedimentation box body close to the lower part of the filter screen. A sealing plate is installed in the slag discharge port. A cam is arranged in the sedimentation box body. The cam contacts the bottom of the filter screen. A driving mechanism for driving the cam to rotate is installed in the sedimentation box body.

[0007] Preferably, the driving mechanism includes a motor fixedly connected to the outside of the sedimentation box body. A driving screw rod is rotatably installed in the sedimentation box body. The output shaft of the motor is fixedly connected to the driving screw rod. A driving guide rod is fixedly connected in the sedimentation box body. A pushing plate that contacts the bottom of the filter screen is arranged in the sedimentation box body. The driving screw rod and the driving guide rod pass through the pushing plate. The driving screw rod is threadedly connected to the pushing plate. The cam is rotatably installed on the pushing plate. A transmission component for driving the cam to rotate is installed on the pushing plate.

[0008] Preferably, the transmission component includes a transmission wheel sleeved on the driving screw rod. The transmission wheel is rotatably connected to the pushing plate and slidably connected to the driving screw rod. A camshaft rotatably connected to the pushing plate is arranged on the cam. A first conveyor belt is sleeved on the transmission wheel and the camshaft.

[0009] Preferably, a cooling mechanism is installed in the sedimentation box body. The cooling mechanism includes a water pump fixedly connected to the outside of the sedimentation box body. The inlet end of the water pump is connected to an external water pipe through a water inlet pipe. A plurality of atomizing nozzles are installed in the sedimentation box body. The outlet end of the water pump is fixedly connected to a water outlet pipe extending into the sedimentation box body. The water outlet pipe is communicated with one of the atomizing nozzles through a water outlet branch pipe. Adjacent two of the atomizing nozzles are communicated with each other through a connecting pipe.

[0010] Preferably, a flushing component is installed in the sedimentation box body. The flushing component includes a flushing pipe slidably installed on the inner wall of the sedimentation box body. A plurality of flushing nozzles capable of corresponding to the mesh holes on the filter screen are fixedly connected to the flushing pipe. A flushing branch pipe is fixedly connected to the water outlet pipe. The flushing branch pipe is communicated with the flushing pipe through a corrugated pipe. A moving mechanism for driving the flushing pipe to move is installed in the sedimentation box body.

[0011] Preferably, a moving groove is formed in the inner wall of the sedimentation box body. The moving mechanism includes a moving screw rod rotatably installed in the moving groove. A moving block is slidably installed in the moving groove. The moving screw rod passes through the moving block and is threadedly connected to the moving block. The flushing pipe is fixedly connected to the moving block. A first rotating shaft is rotatably installed on the inner wall of the moving groove. The first rotating shaft is connected to the moving screw rod through a bevel gear set. A second rotating shaft is rotatably installed on the inner wall of the sedimentation box body. Both the first rotating shaft and the second rotating shaft extend to the outside of the sedimentation box body. A second conveyor belt is sleeved on the first rotating shaft and the second rotating shaft. A first bevel gear is fixedly connected to the second rotating shaft. A second bevel gear rotatably connected to the push plate is sleeved on the driving screw rod. The second bevel gear is slidably connected to the driving screw rod and can be engaged with the first bevel gear. A first spring capable of contacting the push plate is fixedly connected to the inner wall of the sedimentation box body. A locking mechanism for locking the push plate is installed on the sedimentation box body.

[0012] Preferably, a valve mechanism is installed in the flushing branch pipe. The valve mechanism includes a valve shaft rotatably installed in the flushing branch pipe. A valve plate is fixedly connected to the valve shaft. The valve shaft extends to the outside of the flushing branch pipe and is fixedly connected to a first gear. A rack meshing with the first gear is fixedly connected to the filter screen.

[0013] Preferably, a slag collection box covering the slag discharge port is fixedly connected to the sedimentation box body. An electric cylinder is hingedly connected in the slag collection box. The top of the sealing plate is hingedly connected to the sedimentation box body. The extending end of the electric cylinder is hingedly connected to the sealing plate. The electric cylinder is electrically connected to the control center.

[0014] Preferably, a first water level sensor and a second water level sensor are arranged in the sedimentation box body. The control center can receive signals sent by the first water level sensor and the second water level sensor. A first solenoid valve is arranged in the extraction pipe. A second solenoid valve is arranged in the discharge pipe. A third solenoid valve is arranged in the air outlet pipe. A fourth solenoid valve is arranged in the drain pipe. The control center is electrically connected to the motor, the water pump, the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve by wires.

[0015] In a second aspect, a method for measuring gas extraction during tunnel construction provided by the present invention adopts the following technical solution: A method for measuring gas extraction during tunnel construction includes the following steps: S1. First, drill a hole in the rock wall of the tunnel and place the extraction pipe in the hole; S2. Then, start the extraction pump and the water pump by the control center, and open the first solenoid valve, the second solenoid valve and the third solenoid valve. The pressure sensor, the temperature sensor, the concentration sensor and the gas flow sensor measure the extracted gas mixture. S3. When the second water level sensor detects the water level, open the fourth solenoid valve to drain the liquid in the sedimentation box; S4. When the first water level sensor detects the water level, start the motor and the electric cylinder. The extraction pump, the first solenoid valve, the second solenoid valve, and the third solenoid valve are closed. The motor drives the filter screen to flip, the cam drives the filter screen to vibrate, and the electric cylinder drives the sealing plate to open; S5. When the filter screen flips to the vertical state, the motor reverses, the filter screen returns to the initial position, and the electric cylinder is closed; S6. When the filter screen returns to the initial position, start the extraction pump and open the first solenoid valve, the second solenoid valve, and the third solenoid valve.

[0016] In summary, the present invention includes at least the following beneficial technical effects: 1. When a large amount of cinder and gravel accumulates on the filter screen, start the drive mechanism. The drive mechanism drives the cam to rotate, and the cam drives the filter screen to vibrate. The cinder and gravel on the filter screen slide along the filter screen, avoiding the accumulation of cinder and gravel on the filter screen, thereby reducing the occurrence of filter screen blockage and solving the problem of low separation efficiency of the gas mixture in the sedimentation box; 2. Start the motor. The motor drives the drive screw to rotate, the drive screw drives the push plate to move, and the push plate pushes the filter screen to flip, so that the filter screen can flip to the vertical state, further avoiding the accumulation of cinder and gravel on the filter screen. At the same time, during the vibration of the filter screen, the blockage in the filter screen holes will not fall into the holes again, making the filter screen cleaner; 3. The water pump transports the external cold water through the water outlet pipe and the flushing branch pipe to the flushing pipe and sprays it out through the flushing nozzle. When the filter screen flips to the vertical state, start the moving mechanism. The moving mechanism drives the flushing pipe to move, the flushing pipe drives the flushing nozzle to move, and the flushing nozzle can flush out the cinder in the filter screen holes, making the filter screen cleaner. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall structural schematic diagram of the tunnel construction gas extraction and measurement device according to the embodiment of the present invention.

[0018] Figure 2 is the back structural schematic diagram of the tunnel construction gas extraction and measurement device according to the embodiment of the present invention.

[0019] Figure 3 is the internal structural schematic diagram of the sedimentation box according to the embodiment of the present invention.

[0020] Figure 4 is the structural schematic diagram of the filter screen according to the embodiment of the present invention.

[0021] Figure 5 It is a schematic structural diagram of the driving mechanism according to an embodiment of the present invention.

[0022] Figure 6 It is a schematic structural diagram of the cooling mechanism according to an embodiment of the present invention.

[0023] Figure 7 It is a schematic structural diagram of the moving mechanism according to an embodiment of the present invention.

[0024] Figure 8 It is a schematic structural diagram of the locking mechanism according to an embodiment of the present invention.

[0025] Figure 9 It is a schematic structural diagram of the push block according to an embodiment of the present invention.

[0026] Explanation of reference numerals: 1, extraction pump; 11, extraction pipe; 12, discharge pipe; 2, sensor mechanism; 21, pressure sensor; 22, temperature sensor; 23, concentration sensor; 24, gas flow sensor; 3, sediment box; 31, gas outlet pipe; 32, drain pipe; 33, filter screen; 34, sealing plate; 35, cam; 351, camshaft; 36, first water level sensor; 37, slag collection box; 38, electric cylinder; 39, second water level sensor; 4, driving mechanism; 41, motor; 42, driving screw; 421, second bevel gear; 43, pushing plate; 44, transmission wheel; 45, first conveyor belt; 46, first spring; 5, cooling mechanism; 51, water pump; 52, atomizing nozzle; 53, water outlet pipe; 531, water outlet branch pipe; 54, flushing pipe; 541, flushing nozzle; 55, flushing branch pipe; 56, corrugated pipe; 6, moving mechanism; 61, moving screw; 62, moving block; 63, first rotating shaft; 64, second rotating shaft; 641, first bevel gear; 65, second conveyor belt; 7, locking mechanism; 71, second spring; 72, locking block; 73, push block; 74, push plate; 8, valve mechanism; 81, valve shaft; 811, first gear; 82, rack. Detailed implementation manners

[0027] The following will further describe the present invention in detail with reference to the attached Figure 1 - attached Figure 9 drawings.

[0028] An embodiment of the present invention discloses a tunnel construction gas extraction and measurement device and method. Refer to Figures 1 to 4, the gas drainage measurement device for tunnel construction includes a drainage pump 1, a drainage pipe 11 connected to the inlet end of the drainage pump 1, a sensor mechanism 2 installed in the drainage pipe 11, a sedimentation box 3, and a control center. The control center is used to receive the signals sent by the sensor mechanism 2. The outlet end of the drainage pump 1 is communicated with the sedimentation box 3 through a discharge pipe 12. An air outlet pipe 31 and a liquid discharge pipe 32 are connected to the sedimentation box 3. The sensor mechanism 2 includes a pressure sensor 21, a temperature sensor 22, a concentration sensor 23, and a gas flow sensor 24. The pressure sensor 21 is used to detect the mixed pressure of the gas mixture in the drainage pipe 11. The temperature sensor 22 is used to detect the temperature of the gas mixture in the drainage pipe 11. The concentration sensor 23 is used to detect the concentration of the gas in the drainage pipe 11. The gas flow sensor 24 is used to detect the total flow rate of the mixed gas in the drainage pipe 11.

[0029] A filter screen 33 is inclined in the sedimentation box 3. The lower end of the filter screen 33 is hinged to the sedimentation box 3. A slag discharge port is opened on the sedimentation box 3 near the lower side of the filter screen 33. A sealing plate 34 is installed in the slag discharge port. A cam 35 is arranged in the sedimentation box 3. The cam 35 contacts the bottom of the filter screen 33. A driving mechanism 4 for driving the cam 35 to rotate is installed in the sedimentation box 3. When a large amount of coal cinder and gravel accumulate on the filter screen 33, the driving mechanism 4 is started. The driving mechanism 4 drives the cam 35 to rotate. The cam 35 drives the filter screen 33 to vibrate. The coal cinder and gravel on the filter screen 33 slide along the filter screen 33, avoiding the accumulation of coal cinder and gravel on the filter screen 33, thereby reducing the occurrence of blockage of the filter screen 33 and solving the problem of low separation efficiency of the gas mixture in the sedimentation box.

[0030] Refer to Figures 3 to 5 , the driving mechanism 4 includes a motor 41 fixedly connected to the outside of the sedimentation box 3. A driving screw 42 is rotatably installed in the sedimentation box 3. The output shaft of the motor 41 is fixedly connected to the driving screw 42. A driving guide rod is fixedly connected in the sedimentation box 3. A pushing plate 43 contacting the bottom of the filter screen 3 is arranged in the sedimentation box 3. The driving screw 42 and the driving guide rod pass through the pushing plate 43. The driving screw 42 is threadedly connected to the pushing plate 43. The cam 35 is rotatably installed on the pushing plate 43. A transmission component for driving the cam 35 to rotate is installed on the pushing plate 43. When the motor 41 is started, the motor 41 drives the driving screw 42 to rotate. The driving screw 42 drives the pushing plate 43 to move. The pushing plate 43 pushes the filter screen 3 to turn over, so that the filter screen 3 can be turned over to a vertical state, further avoiding the accumulation of coal cinder and gravel on the filter screen 33. At the same time, during the vibration of the filter screen 3, the blockage in the mesh holes of the filter screen 3 will not fall into the mesh holes again, making the cleaning of the filter screen 3 cleaner.

[0031] Refer to Figure 4 andFigure 5 The transmission component includes a transmission wheel 44 sleeved on the driving screw 42. The transmission wheel 44 is rotatably connected to the pushing plate 43 and slidably connected to the driving screw 42. A chute is formed on the driving screw 42, and a slider placed in the chute is fixedly connected to the transmission wheel 44. A camshaft 351 rotatably connected to the pushing plate 43 is provided on the cam 35. A first conveyor belt 45 is sleeved on the transmission wheel 44 and the camshaft 351. During the rotation of the driving screw 42, the driving screw 42 drives the transmission wheel 44 to rotate. At the same time, the pushing plate 43 drives the transmission wheel 44 to move. The transmission wheel 44 drives the camshaft 351 to rotate through the first conveyor belt 45, and the camshaft 351 drives the cam 35 to rotate, so as to push the filter screen 33 to vibrate during the flipping of the filter screen 33.

[0032] Refer to Figures 3 to 6 A cooling mechanism 5 is installed in the deposition box 3. The cooling mechanism 5 includes a water pump 51 fixedly connected to the outside of the deposition box 3. The water inlet end of the water pump 51 is connected to an external water pipe through a water inlet pipe. A plurality of atomizing nozzles 52 are installed in the deposition box 3. The water outlet end of the water pump 51 is fixedly connected to a water outlet pipe 53 extending into the deposition box 3. The water outlet pipe 53 is communicated with one of the atomizing nozzles 52 through a water outlet branch pipe 531. Adjacent two atomizing nozzles 52 are communicated through a connecting pipe. When the water pump 51 is started, the water pump 51 transports the external cold water through the water inlet pipe and the water outlet pipe 53 to the atomizing nozzles 52 to cool the extracted gas mixture.

[0033] Refer to Figures 3 to 6 A flushing component is installed in the deposition box 3. The flushing component includes a flushing pipe 54 slidably installed on the inner wall of the deposition box 3. A plurality of flushing nozzles 541 capable of corresponding to the mesh holes on the filter screen 33 are fixedly connected to the flushing pipe 54. A flushing branch pipe 55 is fixedly connected to the water outlet pipe 53. The flushing branch pipe 55 is communicated with the flushing pipe 54 through a corrugated pipe 56. A moving mechanism 6 for driving the flushing pipe 54 to move is installed in the deposition box 3. The water pump 51 transports the external cold water through the water outlet pipe 53 and the flushing branch pipe 55 to the flushing pipe 54 and sprays it out through the flushing nozzles 541. When the filter screen 3 is flipped to the vertical state, the moving mechanism 6 is started. The moving mechanism 6 drives the flushing pipe 54 to move, and the flushing pipe 54 drives the flushing nozzles 541 to move. The flushing nozzles 541 can flush out the coal cinder in the mesh holes of the filter screen 3, making the cleaning of the filter screen 3 cleaner.

[0034] Refer to Figures 2 to 9, a moving groove is formed in the inner wall of the deposition box body 3. The moving mechanism 6 includes a moving screw 61 rotatably installed in the moving groove. A moving block 62 is slidably installed in the moving groove. The moving screw 61 passes through the moving block 62 and is threadedly connected to the moving block 62. The flushing pipe 54 is fixedly connected to the moving block 62. A first rotating shaft 63 is rotatably installed on the inner wall of the moving groove. The first rotating shaft 63 is connected to the moving screw 61 through a bevel gear set. A second rotating shaft 64 is rotatably installed on the inner wall of the deposition box body 3. Both the first rotating shaft 63 and the second rotating shaft 64 extend to the outside of the deposition box body 3. A second conveyor belt 65 is sleeved on the first rotating shaft 63 and the second rotating shaft 64. A first bevel gear 641 is fixedly connected to the second rotating shaft 64. A second bevel gear 421 rotatably connected to the pushing plate 43 is sleeved on the driving screw 42. The second bevel gear 421 is slidably connected to the driving screw 42. A slider placed in the sliding groove is fixedly connected to the second bevel gear 421. The second bevel gear 421 can be engaged with the first bevel gear 641. A first spring 46 capable of contacting the pushing plate 43 is fixedly connected to the inner wall of the deposition box body 3. A locking mechanism 7 for locking the pushing plate 43 is installed on the deposition box body 3.

[0035] During the rotation of the driving screw 42, the driving screw 42 drives the second bevel gear 421 to rotate. At the same time, the pushing plate 43 drives the second bevel gear 421 to move. When the filter screen 3 is flipped to the vertical state, the second bevel gear 421 is engaged with the first bevel gear 641. The pushing plate 43 abuts against the first spring 46. The locking mechanism 7 locks the pushing plate 43. The second bevel gear 421 drives the second rotating shaft 64 to rotate. The second rotating shaft 64 drives the first rotating shaft 63 to rotate through the second conveyor belt 65. The first rotating shaft 63 drives the moving screw 61 to rotate. The moving screw 61 drives the moving block 62 to move. The moving block 62 drives the flushing pipe 54 to move, and then the filter screen 3 can be flushed. When the flushing pipe 54 moves to the bottom, the motor 41 is started to reverse. The motor 41 first drives the flushing pipe 54 to return. When the flushing pipe 54 moves to the initial position, the locking mechanism 7 releases the lock on the pushing plate 43. The driving screw 42 drives the pushing plate 43 to return, and the filter screen 3 is flipped to the inclined state.

[0036] Refer to Figures 2 to 9, an installation groove is formed on the inner wall of the sedimentation box body 3. The locking mechanism 7 includes a second spring 71 fixedly connected to the inner wall of the installation groove and a locking block 72 slidably installed in the installation groove. The second spring 71 is fixedly connected to the locking block 72. A plugging groove for the insertion of the locking block 72 is formed on the pushing plate 43. A first through groove is formed on the inner wall of the moving groove, and a second through groove communicating with the installation groove is formed on the inner wall of the first through groove. A pushing block 73 is slidably installed in the first through groove, and a pushing plate 74 is slidably installed in the second through groove. The pushing block 73 is fixedly connected to the pushing plate 74. The pushing plate 74 is fixedly connected to the locking block 72. A downwardly inclined pushing slope is formed on the end face of the pushing block 73 facing the moving block 62, and the moving block 62 can contact the pushing slope; when the pushing plate 43 pushes the filter screen 3 to flip to the vertical state, the locking block 72 is opposite to the plugging groove. At this time, the moving block 62 moves downward, the moving block 62 is separated from the pushing slope, and the second spring 71 pushes the locking block 72 to insert into the plugging groove, and the locking block 72 locks the pushing plate 43. During the reverse rotation of the driving screw 42, the moving block 62 first moves upward. When the moving block 62 contacts the pushing slope, the moving block 62 pushes the pushing block 73 to move, the pushing block 73 drives the pushing plate 74 to move, and the pushing plate 74 drives the locking block 72 to move, so that the locking block 72 is pulled out of the plugging groove, and the driving screw 42 drives the pushing plate 43 to return.

[0037] Refer to Figures 3 to 6 , a valve mechanism 8 is installed in the flushing branch pipe 55. The valve mechanism 8 includes a valve shaft 81 rotatably installed in the flushing branch pipe 55. A valve plate is fixedly connected to the valve shaft 81. The valve shaft 81 extends to the outside of the flushing branch pipe 55 and is fixedly connected with a first gear 811. A rack 82 meshing with the first gear 811 is fixedly connected to the filter screen 33; during the process of the filter screen 33 filtering the extracted gas mixture, the valve plate closes the flushing branch pipe 55. During the flipping process of the filter screen 33, the filter screen 33 drives the rack 82 to rotate. When the rack 82 meshes with the first gear 811, the rack 82 drives the first gear 811 to rotate, the first gear 811 drives the valve shaft 81 to rotate, and the valve shaft 81 drives the valve plate to rotate. When the filter screen 33 flips to the vertical state, cold water is transported from the water outlet pipe 53 to the flushing branch pipe 55 and then to the flushing pipe 54.

[0038] Refer to Figures 1 to 3 , a slag collecting box 37 covering the slag discharge port is fixedly connected to the sedimentation box body 3. An electric cylinder 38 is hingedly connected inside the slag collecting box 37. The top of the sealing plate 34 is hingedly connected to the sedimentation box body 3. The extending end of the electric cylinder 38 is hingedly connected to the sealing plate 34. The electric cylinder 38 is electrically connected to the control center; when the electric cylinder 38 is started, the electric cylinder 38 drives the sealing plate 34 to flip, and the filtered coal slag and gravel can be discharged into the slag collecting box 37 through the slag discharge port.

[0039] Reference Figures 1 to 3 In the sedimentation box 3, a first water level sensor 36 and a second water level sensor 39 are provided. The control center can receive the signals sent by the first water level sensor 36 and the second water level sensor 39. A first solenoid valve is provided in the extraction pipe 11, a second solenoid valve is provided in the discharge pipe 12, a third solenoid valve is provided in the air outlet pipe 31, and a fourth solenoid valve is provided in the drain pipe 32. The control center is electrically connected to the motor 41, the water pump 51, the first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve.

[0040] The implementation principle of the gas extraction and measurement device for tunnel construction in an embodiment of the present invention is as follows: First, a hole is drilled in the rock wall of the tunnel, and the extraction pipe 11 is placed in the hole. Then, the control center starts the extraction pump 1 and the water pump 51, and opens the first solenoid valve, the second solenoid valve, and the third solenoid valve. The pressure sensor 21, the temperature sensor 22, the concentration sensor 23, and the gas flow sensor 24 measure the extracted gas mixture. When the second water level sensor 39 detects the water level, the fourth solenoid valve is opened to discharge the liquid in the sedimentation box 3. When the first water level sensor 36 detects the water level, the motor 41 and the electric cylinder 38 are started, and the extraction pump 1, the first solenoid valve, the second solenoid valve, and the third solenoid valve are closed. The motor 41 drives the driving screw 42 to rotate, the driving screw 42 drives the filter screen 33 to flip, and at the same time, the cam 35 drives the filter screen 33 to vibrate, and the electric cylinder 38 drives the sealing plate 34 to open; when the filter screen 3 flips to the vertical state, the second bevel gear 421 meshes with the first bevel gear 641, the pushing plate 43 abuts against the first spring 46, the driving screw 42 drives the moving block 62 to move, the moving block 62 drives the flushing pipe 54 to move, and the locking block 72 is inserted into the insertion slot to flush the filter screen 3; when the flushing pipe 54 moves to the bottom, the control center starts the motor 41 to reverse, the moving block 62 first drives the flushing pipe 54 to return, when the flushing pipe 54 moves to the initial position, the locking block 72 is pulled out of the insertion slot, the driving screw 42 drives the pushing plate 43 to return, the filter screen 3 flips to the inclined state, the electric cylinder 38 is closed, and when the filter screen 33 returns to the initial position, the extraction pump 1 is started, and the first solenoid valve, the second solenoid valve, and the third solenoid valve are opened.

[0041] A gas extraction and measurement method for tunnel construction includes the following steps: S1. First, a hole is drilled in the rock wall of the tunnel, and the extraction pipe 11 is placed in the hole.

[0042] S2. Then, the control center starts the extraction pump 1 and the water pump 51, and opens the first solenoid valve, the second solenoid valve, and the third solenoid valve. The pressure sensor 21, the temperature sensor 22, the concentration sensor 23, and the gas flow sensor 24 measure the extracted gas mixture.

[0043] S3. When the second water level sensor 39 detects the water level, open the fourth solenoid valve to drain the liquid in the sediment box 3.

[0044] S4. When the first water level sensor 36 detects the water level, start the motor 41 and the electric cylinder 38. The extraction pump 1, the first solenoid valve, the second solenoid valve, and the third solenoid valve are closed. The motor 41 drives the filter screen 33 to flip, the cam 35 drives the filter screen 33 to vibrate, and the electric cylinder 38 drives the sealing plate 34 to open.

[0045] S5. When the filter screen 33 flips to the vertical state, the motor 41 rotates in reverse, the filter screen 33 returns to the initial position, and the electric cylinder 38 is closed.

[0046] S6. When the filter screen 33 returns to the initial position, start the extraction pump 1 and open the first solenoid valve, the second solenoid valve, and the third solenoid valve.

[0047] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A tunnel construction gas extraction measuring device, comprising an extraction pump (1), an extraction pipe (11) connected to the inlet end of the extraction pump (1), a sensor mechanism (2) installed in the extraction pipe (11), a deposition box (3) and a control center, wherein the control center is used to receive a signal sent by the sensor mechanism (2), the outlet end of the extraction pump (1) is connected to the deposition box (3) through a discharge pipe (12), and the deposition box (3) is connected to an air outlet pipe (31) and a liquid discharge pipe (32), characterized in that: A filter screen (33) is obliquely arranged in the sedimentation box (3), one end of the filter screen (33) is hingedly connected to the sedimentation box (3), a slag discharge port is opened on a side of the sedimentation box (3) close to the lower side of the filter screen (33), a sealing plate (34) is installed in the slag discharge port, a cam (35) is arranged in the sedimentation box (3), the cam (35) is in contact with the bottom of the filter screen (33), and a driving mechanism (4) for driving the cam (35) to rotate is installed in the sedimentation box (3).

2. A tunnel construction gas extraction measuring device according to claim 1, characterized in that: The driving mechanism (4) comprises a motor (41) fixedly connected to the outside of a deposition box (3); a driving screw (42) is rotatably mounted in the deposition box (3); an output shaft of the motor (41) is fixedly connected to the driving screw (42); a driving guide rod is fixedly connected in the deposition box (3); a pushing plate (43) in contact with the bottom of the filter screen (3) is arranged in the deposition box (3); the driving screw (42) and the driving guide rod are inserted into the pushing plate (43); the driving screw (42) and the pushing plate (43) are threadedly connected; the cam (35) is rotatably mounted on the pushing plate (43); and a transmission component for driving the cam (35) to rotate is mounted on the pushing plate (43).

3. A tunnel construction gas extraction measuring device according to claim 2, characterized in that: The transmission component comprises a transmission wheel (44) sleeved on the driving screw (42), the transmission wheel (44) being rotationally connected to the push plate (43), the transmission wheel (44) being slidingly connected to the driving screw (42), the cam (35) being provided with a cam shaft (351) rotationally connected to the push plate (43), and a first conveyor belt (45) being sleeved on the transmission wheel (44) and the cam shaft (351).

4. A tunnel construction gas extraction measuring device according to claim 2, characterized in that: A cooling mechanism (5) is installed in the deposition box (3), and the cooling mechanism (5) comprises a water pump (51) fixedly connected to the outside of the deposition box (3), the water inlet end of the water pump (51) is connected to an external water pipe via a water inlet pipe, a plurality of atomizing nozzles (52) are installed in the deposition box (3), the water outlet end of the water pump (51) is fixedly connected to a water outlet pipe (53) extending into the deposition box (3), the water outlet pipe (53) is connected to one of the atomizing nozzles (52) via a water outlet branch pipe (531), and two adjacent atomizing nozzles (52) are connected via a connecting pipe.

5. A tunnel construction gas extraction and measurement device according to claim 4, characterized in that: A flushing component is installed in the sedimentation box (3), and the flushing component includes a flushing pipe (54) slidably installed on the inner wall of the sedimentation box (3), and a plurality of flushing nozzles (541) that can be opposite to the mesh holes on the filter screen (33) are fixedly connected to the flushing pipe (54), and a flushing branch pipe (55) is fixedly connected to the water outlet pipe (53), and the flushing branch pipe (55) is connected to the flushing pipe (54) through a bellows (56). A moving mechanism (6) for driving the flushing pipe (54) to move is installed in the sedimentation box (3).

6. A tunnel construction gas extraction and measurement device according to claim 5, characterized in that: The inner wall of the deposition box (3) is provided with a moving groove, the moving mechanism (6) comprises a moving screw (61) rotatably mounted in the moving groove, a moving block (62) is slidably mounted in the moving groove, the moving screw (61) is inserted into the moving block (62) and is threadedly connected to the moving block (62), the flushing pipe (54) is fixedly connected to the moving block (62), a first rotating shaft (63) is rotatably mounted on the inner wall of the moving groove, the first rotating shaft (63) and the moving screw (61) are connected via a bevel gear set, a second rotating shaft (64) is rotatably mounted on the inner wall of the deposition box (3), the first rotating shaft (63) and the second rotating shaft (64) both extend to the deposition box (3). On the outer side of the deposition box (3), a second conveyor belt (65) is sleeved on the first rotating shaft (63) and the second rotating shaft (64), a first bevel gear (641) is fixedly connected to the second rotating shaft (64), a second bevel gear (421) is sleeved on the driving screw (42) and is rotatably connected to the push plate (43), the second bevel gear (421) is slidably connected to the driving screw (42) and can mesh with the first bevel gear (641), a first spring (46) that can contact the push plate (43) is fixedly connected to the inner wall of the deposition box (3), and a locking mechanism (7) for locking the push plate (43) is installed on the deposition box (3).

7. A tunnel construction gas extraction and measurement device according to claim 5, characterized in that: A valve mechanism (8) is installed in the flushing branch pipe (55), and the valve mechanism (8) comprises a valve shaft (81) rotatably installed in the flushing branch pipe (55), a valve plate being fixedly connected to the valve shaft (81), the valve shaft (81) extending to the outside of the flushing branch pipe (55) and being fixedly connected to a first gear (811), and a rack (82) meshing with the first gear (811) being fixedly connected to the filter screen (33).

8. A tunnel construction gas extraction and measurement device according to claim 1, characterized in that: The deposition box (3) is fixedly connected to a slag collecting box (37) which is covered on the slag discharge port. The slag collecting box (37) is hingedly connected to an electric cylinder (38). The top of the sealing plate (34) is hingedly connected to the deposition box (3). The protruding end of the electric cylinder (38) is hingedly connected to the sealing plate (34). The electric cylinder (38) is electrically connected to a control center.

9. A tunnel construction gas extraction and measurement device according to claim 4, characterized in that: A first water level sensor (36) and a second water level sensor (39) are arranged in the sedimentation box (3); the control center is capable of receiving signals sent by the first water level sensor (36) and the second water level sensor (39); a first solenoid valve is arranged in the extraction pipe (11); a second solenoid valve is arranged in the discharge pipe (12); a third solenoid valve is arranged in the air outlet pipe (31); a fourth solenoid valve is arranged in the liquid discharge pipe (32); and the control center is connected to the motor (41), the water pump (51), the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve by electric wires.

10. A method for measuring gas extraction in tunnel construction, using a device for measuring gas extraction in tunnel construction according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. First, a hole is opened on the rock wall of the tunnel, and a extraction pipe (11) is placed in the hole; S2, the control center then starts the extraction pump (1) and the water pump (51), and opens the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve, and the pressure sensor (21), the temperature sensor (22), the concentration sensor (23) and the gas flow sensor (24) measure the extracted gas mixture; S3, when the second water level sensor (39) detects the water level, the fourth solenoid valve is opened to discharge the liquid in the sedimentation box (3); S4. When the first water level sensor (36) detects the water level, the motor (41) and the electric cylinder (38) are started, the extraction pump (1), the first solenoid valve, the second solenoid valve and the third solenoid valve are closed, the motor (41) drives the filter screen (33) to flip, the cam (35) drives the filter screen (33) to vibrate, and the electric cylinder (38) drives the sealing plate (34) to open; S5, when the filter screen (33) is turned over to a vertical state, the motor (41) is reversed, the filter screen (33) returns to the initial position, and the electric cylinder (38) is closed; S6. When the filter screen (33) returns to the initial position, the extraction pump (1) is started, and the first solenoid valve, the second solenoid valve and the third solenoid valve are opened.

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