A stone transport device for tunnel drilling and blasting engineering

Abstract

The present invention belongs to the technical field of stone transportation equipment, and in particular relates to a stone transportation device used in tunnel drilling and blasting projects, comprising a belt conveyor body, the lower side wall of the belt conveyor body being fixedly connected to an L-shaped bottom plate, the upper surface of the belt conveyor body being fixedly connected to a cover plate by bolts, and the upper surface of the cover plate being fixedly connected to a dust collection mechanism. The present invention enables the tunnel stone transportation device to have the function of dust purification while transporting stones, thereby preventing excessive dust from drifting and affecting the efficiency and continuity of stone transportation, and ensuring the health of workers. In addition, the device also has the functions of convenient crushing of large stones, dust filtration effect detection and reminder, and does not require the cooperation of multiple people to move large stones, effectively improving the convenience and efficiency of stone transportation in the tunnel, and reducing the labor intensity of workers, while facilitating daily maintenance of the device and improving the convenience of using the device.

Description

Technical Field

[0001] The invention belongs to the technical field of stone transportation equipment, and in particular relates to a stone transportation device used in tunnel drilling and blasting engineering. Background Art

[0002] The drilling and blasting method is a construction method for rock excavation through drilling, charging, and blasting. First, blastholes are drilled in the rock mass according to the design, and then explosives are loaded and detonated to crack and loosen the rock. Then, the slag is cleared to form an excavation surface. In tunnel construction, the drilling and blasting method is a traditional and widely used method, especially suitable for hard rock formations. Its process includes drilling, blasting, ventilation and dust removal, and slag removal. Currently, when it is necessary to transport stones after tunnel drilling and blasting, due to the small tunnel space, engineering transport vehicles and forklifts are difficult to enter, resulting in the stones at the drilling and blasting location needing to be transported outside the tunnel by a transportation device. For example, the patent with authorization announcement number CN111792298B discloses a stone transportation mechanism for tunnel drilling and blasting projects.

[0003] Currently, after tunnel drilling and blasting operations are completed, the stone material must be transported manually to transport equipment. During this process, the movement of the stone material causes a large amount of dust generated by the drilling and blasting to re-disperse, polluting the environment and potentially negatively impacting the health of workers. If the dust spreads severely, workers must temporarily evacuate outside the tunnel and use dust suppression equipment to reduce dust concentration before continuing operations. This series of operations reduces the sustainability and efficiency of stone material transportation within the tunnel.

[0004] In addition, during tunnel drilling and blasting operations, the blast wave is difficult to accurately control, resulting in different sizes of stones produced. In particular, large stones require multiple workers to carry them to transportation equipment. This not only increases the labor intensity of the workers, but also affects the convenience and efficiency of stone transportation in the tunnel due to the time-consuming process of multiple people carrying large stones.

[0005] Therefore, we propose a stone transport device for tunnel drilling and blasting engineering to solve the above problems. Summary of the Invention

[0006] The object of the present invention is to provide a stone transport device for tunnel drilling and blasting engineering in order to solve the above problems.

[0007] To achieve the above-mentioned object, the present invention adopts the following technical solution: a stone material transport device for tunnel drilling and blasting engineering, comprising a belt conveyor body, an L-shaped bottom plate fixedly connected to the lower side wall of the belt conveyor body, a cover plate fixedly connected to the upper surface of the belt conveyor body by bolts, and a dust collection mechanism fixedly connected to the upper surface of the cover plate;

[0008] The upper surface of the L-shaped bottom plate is fixedly connected with a dust filtering mechanism, a PLC controller and a compressed air box;

[0009] The side wall of the compressed air box is fixedly connected to a high-pressure air pipe, and the air outlet end of the high-pressure air pipe is fixedly connected to a stone crushing mechanism;

[0010] The dust collecting mechanism includes a dust collecting hood fixedly connected to the upper surface of the cover plate, the upper surface of the dust collecting hood is provided with multiple groups of symmetrically distributed air inlet holes, the upper surface of the cover plate is provided with multiple air holes, and the side wall of the dust collecting hood is fixedly connected to multiple conveying hoses.

[0011] In the above-mentioned stone transportation device in a tunnel drilling and blasting project, the dust filtering mechanism includes a processing cover that is sealed and fixedly connected to the inner wall of the L-shaped bottom plate, the side wall of the L-shaped bottom plate is provided with a square dust cleaning countersunk hole, and the hole wall of the square dust cleaning countersunk hole is fixedly connected to a sealing cover by bolts, the air outlet ends of the plurality of conveying hoses are fixedly connected to the outer wall of the processing cover, the upper surface of the processing cover is fixedly embedded with a bent pipe, the bottom end of the bent pipe extends into the interior of the processing cover, the top inner wall of the processing cover is fixedly connected to an external threaded ring, the outer wall of the external threaded ring is threadedly connected to an internal threaded ring, and the bottom inner wall of the internal threaded ring is fixedly connected to A composite filter cartridge is connected, the air outlet end of the bent pipe is fixedly connected to a connecting pipe, the bottom end of the connecting pipe is fixedly connected to a powerful suction fan, the bottom end of the powerful suction fan is fixedly connected to the inner wall of the L-shaped bottom plate, the air outlet end of the powerful suction fan is provided with a through hole, and the hole wall of the through hole is fixedly connected to a wind pressure sensor, the air outlet end of the powerful suction fan is fixedly connected to an air guide pipe, the air outlet end of the air guide pipe is fixedly connected to a one-way exhaust valve, the air outlet end of the one-way exhaust valve is fixedly connected to the outer wall of the compressed air box, the top of the compressed air box is fixedly connected to a pressure relief valve, and the upper surface of the compressed air box is fixedly connected to an audible and visual alarm.

[0012] In the above-mentioned stone transportation device in a tunnel drilling and blasting project, the outer wall of the composite filter cartridge is fixedly sleeved with a protective metal mesh sleeve, the top of the protective metal mesh sleeve is fixedly connected to the outer wall of the internal thread ring, and the upper surface of the internal thread ring is fixedly connected with a sealing ring.

[0013] In the above-mentioned stone transportation device in a tunnel drilling and blasting project, the stone crushing mechanism includes a normally closed solenoid valve fixedly connected to the air outlet end of the high-pressure air pipe, the air outlet end of the normally closed solenoid valve is fixedly connected to an air cylinder, the top of the air cylinder is fixedly connected to a normally open solenoid valve, the inner wall of the air cylinder is sealed and movably connected to a piston, the bottom end of the piston is fixedly connected to a moving rod, the bottom end of the moving rod passes through the through hole at the bottom end of the air cylinder and is fixedly connected to a stone crushing hammer, the rod wall of the moving rod is movably sleeved with a spring, the two ends of the spring are respectively fixedly connected to the lower surface of the piston and the inner wall of the bottom end of the air cylinder, the outer wall of the air cylinder is fixedly connected to two handle rods, the outer wall of one of the handle rods is fixedly connected to a touch pressure switch, and the pipe wall of the high-pressure air pipe is fixedly connected to an auxiliary mechanism.

[0014] In the above-mentioned stone transportation device in a tunnel drilling and blasting project, the auxiliary mechanism includes a regulating valve fixedly connected to the wall of the high-pressure air pipe, the air outlet end of the regulating valve is sealed and connected to a silicone hose, and the air outlet end of the silicone hose is fixedly connected to a safety breathing mask, and the outer wall of the safety breathing mask is provided with multiple air outlet holes.

[0015] In the above-mentioned stone transport device for tunnel drilling and blasting engineering, a retaining ring is fixedly sleeved on the outer wall of the bottom end of the moving rod, and a corrugated sleeve for cable positioning is fixedly sleeved on the outer wall of the high-pressure air pipe.

[0016] In the above-mentioned stone transportation device in a tunnel drilling and blasting project, the L-shaped base plate and the bottom end of the belt conveyor body are fixedly connected to multiple sets of symmetrically distributed universal wheels, and two symmetrically distributed electric push rods are fixedly embedded on the lower surface of the L-shaped base plate, and the moving end of the electric push rod is fixedly connected to a pointed insertion rod.

[0017] In the above-mentioned stone transportation device in a tunnel drilling and blasting project, the belt conveyor body includes a shell, a conveying belt and multiple belt rollers. The outer wall of the shell is fixedly connected to a drive motor, and the output end of the drive motor is fixedly connected to a driving bevel gear. The side end of one of the belt rollers is fixedly connected to a driven bevel gear meshing with the driving bevel gear. The outer wall of the conveying belt is evenly and fixedly embedded with multiple metal ridges, and the outer wall of the shell is fixedly connected to an L-shaped protective plate.

[0018] Compared with existing technologies, the advantages of a stone transport device in tunnel drilling and blasting engineering are:

[0019] 1. Through the belt conveyor body, dust collection mechanism and dust filtering mechanism, when the tunnel needs to transport stones after drilling and blasting, the transport device is first transferred to the tunnel through the universal wheel, and then the PLC controller controls the powerful suction fan, electric push rod and drive motor to work. The electric push rod and pointed plug rod fix the transport device. The dust collection mechanism and dust filtering mechanism cooperate to suck the air in the tunnel and the belt conveyor body. The air carries dust into the processing hood, and then the dust is intercepted by the composite filter cartridge, avoiding the staff from inhaling a large amount of dust in the working environment, protecting the health of the staff, and preventing the staff from suspending the stone transportation work due to excessive dust drift. This mechanism enables the tunnel stone transport device to have the function of dust purification while transporting stones, avoiding excessive dust drift that affects the efficiency and sustainability of stone transportation, and can ensure the health of the staff.

[0020] 2. Through the auxiliary mechanism, when the staff is working, they open the regulating valve and adjust the air supply speed to allow air to enter the safety breathing mask. After that, the staff can wear the safety breathing mask when moving the stones to the main body of the belt conveyor. The clean air in the safety breathing mask can be used for the staff to breathe, further preventing the staff from inhaling dust in the tunnel. The air in the safety breathing mask is discharged through the air outlet. This mechanism can prevent the staff from inhaling dust in the tunnel as much as possible and ensure the health of the staff.

[0021] 3. Through the provided stone crushing mechanism, when the worker encounters a large stone that is inconvenient to move while moving the stone to the main body of the belt conveyor, the worker holds the handle and brings the stone crushing hammer close to the large stone. Then the worker presses the button of the touch switch, and then the normally open solenoid valve and the normally closed solenoid valve are intermittently energized and de-energized, so that the air cylinder is filled with air and exhausted in a cycle, thereby driving the stone crushing hammer to reciprocate. When the reciprocating stone crushing hammer contacts the large stone, it will impact the large stone and achieve the purpose of crushing the large stone. In addition, when the stone crushing mechanism is not working and the regulating valve discharges a small amount of air, the air pressure in the compressed air tank continues to rise. When the air pressure in the compressed air tank reaches the air pressure limit of the pressure relief valve, the pressure relief valve is opened to discharge excess air in the compressed air tank, thereby ensuring the continuous and reliable operation of the powerful suction fan. This mechanism enables the tunnel stone transportation device to have the function of conveniently crushing large stones, and does not require the cooperation of multiple people to move large stones, effectively improving the convenience and efficiency of stone transportation in the tunnel, and reducing the labor intensity of the workers.

[0022] 4. Through the set wind pressure sensor and sound and light alarm, as the dust filtering mechanism continues to work, the amount of dust attached to the surface of the composite filter cartridge increases. When the filtering effect of the composite filter cartridge gradually weakens, the wind pressure sensor at the air outlet of the powerful suction fan will detect the wind pressure in real time, and convert the wind pressure value into an electrical signal and transmit it to the PLC controller. If the wind pressure value detected by the wind pressure sensor is lower than the wind pressure range preset by the PLC controller, the PLC controller controls the sound and light alarm to alarm, reminding the staff to clean the dust on the composite filter cartridge so that the composite filter cartridge can reliably filter the dust later. At this time, the PLC controller controls the powerful suction fan to cut off the power and suspend work to avoid dust from entering the compressed air box. This mechanism enables the tunnel stone transportation device to have the function of dust filtering effect detection and reminder, facilitates the daily maintenance of the device, and improves the convenience of device use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of a stone transport device for tunnel drilling and blasting engineering provided by the present invention;

[0024] Figure 2 yes Figure 1 Schematic diagram of the structure viewed from the middle AA direction;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of a processing cover in a stone material transport device in a tunnel drilling and blasting project provided by the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of a partial dust filtering mechanism in a stone material transport device in a tunnel drilling and blasting project provided by the present invention;

[0027] Figure 5 This is a schematic diagram of the three-dimensional structure of a powerful suction fan in a stone material transport device in a tunnel drilling and blasting project provided by the present invention;

[0028] Figure 6 This is a partially enlarged structural diagram of a stone material transport device used in a tunnel drilling and blasting project provided by the present invention;

[0029] Figure 7 The present invention provides a structural schematic diagram of a stone crushing mechanism in a stone transport device for use in tunnel drilling and blasting engineering.

[0030] In the figure: 1 L-shaped bottom plate, 2 belt conveyor body, 21 shell, 22 conveyor belt, 23 belt roller, 24 drive motor, 25 driving bevel gear, 26 driven bevel gear, 27 metal ridge, 28 L-shaped protective plate, 3 cover plate, 4 dust collection mechanism, 41 dust collection cover, 42 air intake hole, 43 air vent, 44 conveying hose, 5 dust filtering mechanism, 51 processing cover, 52 sealing cover, 53 elbow, 54 external thread ring, 55 internal thread ring, 56 composite filter cartridge, 57 connecting pipe, 58 powerful suction fan, 59 wind pressure sensor, 510 air guide pipe, 5 11 one-way exhaust valve, 512 pressure relief valve, 513 sound and light alarm, 6 PLC controller, 7 universal wheel, 8 stone crushing mechanism, 81 normally closed solenoid valve, 82 air cylinder, 83 normally open solenoid valve, 84 piston, 85 moving rod, 86 stone crushing hammer, 87 spring, 88 handle bar, 89 touch pressure switch, 9 auxiliary mechanism, 91 regulating valve, 92 silicone hose, 93 safety breathing mask, 94 air outlet, 10 compressed air tank, 11 high-pressure air pipe, 12 protective metal mesh, 13 sealing ring, 14 retaining ring, 15 corrugated sleeve, 16 pointed plug rod, 17 electric push rod. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] like Figure 1-Figure 7As shown, a stone transportation device for tunnel drilling and blasting engineering includes a belt conveyor body 2, the lower side wall of the belt conveyor body 2 is fixedly connected to an L-shaped bottom plate 1, the upper surface of the belt conveyor body 2 is fixedly connected to a cover plate 3 by bolts, the upper surface of the cover plate 3 is fixedly connected to a dust collecting mechanism 4, the dust collecting mechanism 4 includes a dust collecting hood 41 fixedly connected to the upper surface of the cover plate 3, the upper surface of the dust collecting hood 41 is provided with multiple groups of symmetrically distributed air inlet holes 42, the upper surface of the cover plate 3 is provided with multiple air holes 43, and the side wall of the dust collecting hood 41 is fixedly connected to multiple conveying hoses 44.

[0033] The belt conveyor body 2 includes a shell 21, a conveying belt 22 and a plurality of belt rollers 23. The outer wall of the shell 21 is fixedly connected to a driving motor 24, and the output end of the driving motor 24 is fixedly connected to a driving bevel gear 25. The side end of one of the belt rollers 23 is fixedly connected to a driven bevel gear 26 that meshes with the driving bevel gear 25. The outer wall of the conveying belt 22 is evenly and fixedly embedded with a plurality of metal ridges 27. The outer wall of the shell 21 is fixedly connected to an L-shaped protective plate 28. The metal ridges 27 increase the surface friction of the conveying belt 22, improve the stability of the stone on the conveying belt 22, further reduce the wear of the conveying belt 22, and improve the reliability and service life of the belt conveyor body 2.

[0034] The upper surface of the L-shaped base plate 1 is fixedly connected with a dust filtering mechanism 5, a PLC controller 6 and a compressed air box 10. The dust filtering mechanism 5 includes a processing cover 51 which is sealed and fixedly connected to the inner wall of the L-shaped base plate 1. The side wall of the L-shaped base plate 1 is provided with a square dust cleaning countersunk hole, and the hole wall of the square dust cleaning countersunk hole is fixedly connected with a sealing cover 52 by bolts. The air outlet ends of multiple conveying hoses 44 are fixedly connected to the outer wall of the processing cover 51. A bend pipe 53 is fixedly embedded in the upper surface of the processing cover 51. The bottom end of the bend pipe 53 extends into the interior of the processing cover 51. The inner wall of the top end of the processing cover 51 is fixedly connected with an external threaded ring 54. The outer wall of the external threaded ring 54 is threadedly connected with an internal threaded ring 55. The inner wall of the bottom end of the internal threaded ring 55 is fixed It is connected to a composite filter cartridge 56, the air outlet end of the bent pipe 53 is fixedly connected to a connecting pipe 57, the bottom end of the connecting pipe 57 is fixedly connected to a powerful suction fan 58, the bottom end of the powerful suction fan 58 is fixedly connected to the inner wall of the L-shaped bottom plate 1, a through hole is provided at the air outlet end of the powerful suction fan 58, and the hole wall of the through hole is fixedly connected to a wind pressure sensor 59, the air outlet end of the powerful suction fan 58 is fixedly connected to an air guide pipe 510, the air outlet end of the air guide pipe 510 is fixedly connected to a one-way exhaust valve 511, the air outlet end of the one-way exhaust valve 511 is fixedly connected to the outer wall of the compressed air box 10, the top of the compressed air box 10 is fixedly connected to a pressure relief valve 512, and the upper surface of the compressed air box 10 is fixedly connected to an audible and visual alarm 513.

[0035] The side wall of the compressed air box 10 is fixedly connected to a high-pressure air pipe 11, and the air outlet end of the high-pressure air pipe 11 is fixedly connected to a stone crushing mechanism 8. The stone crushing mechanism 8 includes a normally closed solenoid valve 81 fixedly connected to the air outlet end of the high-pressure air pipe 11, and the air outlet end of the normally closed solenoid valve 81 is fixedly connected to an air cylinder 82. The top of the air cylinder 82 is fixedly connected to a normally open solenoid valve 83. The inner wall of the air cylinder 82 is sealed and movably connected to a piston 84. The bottom end of the piston 84 is fixedly connected to a moving rod 85. The bottom end of the moving rod 85 passes through the through hole at the bottom end of the air cylinder 82 and is fixedly connected to a stone crushing hammer 86. The rod wall of the moving rod 85 is movably sleeved with a spring 8 7. The two ends of the spring 87 are fixedly connected to the lower surface of the piston 84 and the inner wall of the bottom end of the air cylinder 82 respectively. The outer wall of the air cylinder 82 is fixedly connected to two handle rods 88, and the outer wall of one of the handle rods 88 is fixedly connected to a touch pressure switch 89. The outer wall of the bottom end of the moving rod 85 is fixedly sleeved with a retaining ring 14, and the outer wall of the high-pressure air pipe 11 is fixedly sleeved with a corrugated sleeve 15 for cable limiting. This mechanism enables the tunnel stone transportation device to have the function of conveniently crushing large stones, and does not require the cooperation of multiple people to move large stones, effectively improving the convenience and efficiency of stone transportation in the tunnel, and reducing the labor intensity of the staff.

[0036] The wall of the high-pressure air pipe 11 is fixedly connected to an auxiliary mechanism 9, which includes a regulating valve 91 fixedly connected to the wall of the high-pressure air pipe 11. The air outlet end of the regulating valve 91 is sealed and connected to a silicone hose 92. The air outlet end of the silicone hose 92 is fixedly connected to a safety breathing mask 93. The safety breathing mask 93 includes a mask body and a breathing safety valve. The air inlet end of the breathing safety valve is sealed and connected to the silicone hose 92. The outer wall of the safety breathing mask 93 is provided with multiple air outlet holes 94. This mechanism can prevent workers from inhaling dust in the tunnel as much as possible, and can ensure the health of the workers.

[0037] The outer wall of the composite filter cartridge 56 is fixedly sleeved with a protective metal mesh sleeve 12, the top of the protective metal mesh sleeve 12 is fixedly connected to the outer wall of the internal threaded ring 55, and the upper surface of the internal threaded ring 55 is fixedly connected with a sealing ring 13. The protective metal mesh sleeve 12 can protect the outside of the composite filter cartridge 56 to prevent large dust particles from damaging the composite filter cartridge 56. The L-shaped bottom plate 1 and the bottom end of the belt conveyor body 2 are jointly fixedly connected with multiple groups of symmetrically distributed universal wheels 7. Two symmetrically distributed electric push rods 17 are fixedly embedded on the lower surface of the L-shaped bottom plate 1. The moving end of the electric push rod 17 is fixedly connected with a pointed insertion rod 16. After the electric push rod 17 is energized, the moving end pushes the pointed insertion rod 16 into the tunnel ground, thereby achieving the purpose of fixing the transportation device and ensuring the stability of the transportation device.

[0038] The driving motor 24, the powerful suction fan 58, the sound and light alarm 513, the normally closed solenoid valve 81, the normally open solenoid valve 83 and the electric push rod 17 are all electrically connected to the output end of the PLC controller 6 through wires, and the touch pressure switch 89 and the wind pressure sensor 59 are electrically connected to the input end of the PLC controller 6 through wires. The above-mentioned power-on equipment and electrical connections are all existing technologies and will not be repeated here.

[0039] The operating principle of the present invention is described as follows: when the stone needs to be transported after the tunnel is drilled and blasted, the transport device is first transferred to the tunnel through the universal wheel 7, and then the PLC controller 6 controls the strong suction fan 58, the electric push rod 17 and the drive motor 24 to work. After the electric push rod 17 is energized, the moving end pushes the pointed rod 16 to insert into the tunnel ground, thereby achieving the purpose of fixing the transport device and ensuring the stability of the transport device. After the drive motor 24 is energized, the belt roller 23 is driven to rotate through the active bevel gear 25 and the driven bevel gear 26. The belt roller 23 makes the conveyor belt 22 rotate. Then the staff only needs to move the stones on the tunnel ground to the bottom of the belt conveyor body 2 and use the rotating conveyor belt 22 to transport the stones. The stones are conveniently transferred to the transport trolley or the next belt conveyor equipment through the belt conveyor body 2 until they are transported out of the tunnel. After the powerful suction fan 58 is powered on, it sucks the air in the cavity inside the processing cover 51 through the connecting pipe 57 and the elbow 53, so that a negative pressure environment is formed inside the processing cover 51. Then the negative pressure processing cover 51 The air in the tunnel and the belt conveyor body 2 is sucked by the dust collecting mechanism 4. The air in the tunnel carries the floating dust and enters the processing cover 51 through the air inlet hole 42. The air in the belt conveyor body 2 carries the dust scattered by the stones during the conveying process of the conveyor belt 22 through the air vent 43 and enters the processing cover 51. Then, the air in the processing cover 51 passes through the composite filter cartridge 56, the elbow 53, the connecting pipe 57 and the powerful suction fan 58 and is transported to the compressed air box 10. In this process, the dust in the processing cover 51 is intercepted by the composite filter cartridge 56. This prevents workers from inhaling large amounts of dust in the working environment, protects their health, and prevents workers from suspending stone transportation due to excessive dust drift. At the same time, the protective metal mesh sleeve 12 can protect the outside of the composite filter cartridge 56 to prevent large dust particles from damaging the composite filter cartridge 56. This mechanism enables the tunnel stone transport device to have the function of dust purification while transporting stones, prevents excessive dust drift from affecting the efficiency and sustainability of stone transportation, and ensures the health of workers.

[0040] The air output by the powerful suction fan 58 is delivered to the compressed air box 10 and the high-pressure air pipe 11 through the one-way exhaust valve 511. When the staff is working, they open the regulating valve 91 and adjust the air delivery speed to allow the air to enter the safety breathing mask 93. In this process, fine particles in the air are filtered by the filter element of the breathing safety valve in the safety breathing mask 93, so that fine particles that are harmful to human health are blocked outside the safety breathing mask 93, ensuring that the staff can breathe clean air through the safety breathing mask 93. Later, the staff can wear the safety breathing mask 93 when moving stones to the belt conveyor body 2. The clean air in the safety breathing mask 93 can be provided for the staff to breathe, further preventing the staff from inhaling dust in the tunnel. The air in the safety breathing mask 93 is discharged through the air outlet 94. This mechanism can prevent the staff from inhaling dust in the tunnel as much as possible, and can ensure the health of the staff.

[0041] Moreover, when the staff encounters a large stone that is inconvenient to move during the process of moving the stone to the belt conveyor body 2, the staff holds the handle bar 88 and moves the stone breaker 86 close to the large stone. Then the staff presses the button of the touch switch 89, and the touch switch 89 is turned on to send an electrical signal to the PLC controller 6. The PLC controller 6 controls the normally closed solenoid valve 81 and the normally open solenoid valve 83 to be intermittently powered on and off according to the received electrical signal. For example, the power-on and power-off time are both 5 seconds, and the power-on and power-off work in a cyclic manner. The normally closed solenoid valve 81 is energized to open, and the normally open solenoid valve 83 is energized to open. After 83 is energized, it is closed. After energized, the normally closed solenoid valve 81 conducts the air path, so that the high-pressure gas in the high-pressure air pipe 11 is transported to the air cylinder 82 through the normally closed solenoid valve 81. The high-pressure gas in the air cylinder 82 pushes the piston 84 to move. The piston 84 not only pushes the moving rod 85 to move, but also squeezes the spring 87, causing the spring 87 to compress and store energy. The piston 84 pushes the moving rod 85 to move, and the moving rod 85 pushes the stone crusher 86 to quickly impact the large stone. After 5 seconds, the normally closed solenoid valve 81 is closed after the power is cut off, isolating the air in the high-pressure air pipe 11 from being injected into the air cylinder 82. At the same time, the normally open solenoid valve 83 is powered off and restored to the conductive state. At this time, the air cylinder 82 is connected to the external environment. At the same time, the piston 84 rebounds under the compression energy of the spring 87 and drives the piston 84 to move upward. The piston 84 moves the stone breaker 86 away from the large stone through the moving rod 85, and prepares for the stone breaker 86 to impact the stone next time. At this time, the air in the air cylinder 82 is discharged through the opened normally open solenoid valve 83. The normally closed solenoid valve 81 and the normally open solenoid valve 83 are energized again and the above steps are repeated, so that the stone breaker 86 can reciprocate and impact the large stone to achieve the purpose of crushing the large stone. When the stone crushing mechanism 8 is not working and the regulating valve 91 discharges a small amount of air, the air pressure in the compressed air box 10 continues to rise. When the air pressure in the compressed air box 10 reaches the air pressure limit of the pressure relief valve 512, the pressure relief valve 512 is opened to discharge the excess air in the compressed air box 10, thereby ensuring that the powerful suction fan 58 continues to work reliably. This mechanism enables the tunnel stone transport device to have the function of conveniently crushing large stones, and does not require the cooperation of multiple people to move large stones, effectively improving the convenience and efficiency of stone transportation in the tunnel and reducing the labor intensity of workers;

[0042] As the dust filtering mechanism 5 continues to work, the amount of dust attached to the surface of the composite filter cartridge 56 increases. When the filtering effect of the composite filter cartridge 56 gradually weakens, the wind pressure sensor 59 at the outlet end of the powerful suction fan 58 will detect the wind pressure in real time and convert the wind pressure value into an electrical signal and transmit it to the PLC controller 6. If the wind pressure value detected by the wind pressure sensor 59 is lower than the wind pressure range preset by the PLC controller 6, that is, too much dust is attached to the surface of the composite filter cartridge 56, affecting the air passing efficiency, the PLC controller 6 will control the sound and light alarm 513 to alarm, reminding the staff to clean up. When there is dust on the composite filter cartridge 56, the staff removes the sealing cover 52, then rotates the composite filter cartridge 56 to separate the internal thread ring 55 from the external thread ring 54, and takes out the composite filter cartridge 56 from the sealing cover 52 for maintenance, so that the composite filter cartridge 56 can reliably filter the dust later. At this time, the PLC controller 6 controls the powerful suction fan 58 to cut off the power and suspend work to avoid dust from entering the compressed air box 10. This mechanism enables the tunnel stone transportation device to have the function of dust filtration effect detection and reminder, which is convenient for daily maintenance of the device and improves the convenience of using the device.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A stone transport device for tunnel drilling and blasting engineering, comprising a belt conveyor body (2), characterized in that: The lower side wall of the belt conveyor body (2) is fixedly connected to an L-shaped bottom plate (1), the upper surface of the belt conveyor body (2) is fixedly connected to a cover plate (3) via bolts, and the upper surface of the cover plate (3) is fixedly connected to a dust collecting mechanism (4); A dust filtering mechanism (5), a PLC controller (6) and a compressed air box (10) are fixedly connected to the upper surface of the L-shaped bottom plate (1); The side wall of the compressed air box (10) is fixedly connected to a high-pressure air pipe (11), and the air outlet end of the high-pressure air pipe (11) is fixedly connected to a stone crushing mechanism (8); The dust collecting mechanism (4) comprises a dust collecting hood (41) fixedly connected to the upper surface of the cover plate (3); the upper surface of the dust collecting hood (41) is provided with a plurality of symmetrically distributed air inlet holes (42); the upper surface of the cover plate (3) is provided with a plurality of air holes (43); and the side wall of the dust collecting hood (41) is fixedly connected to a plurality of conveying hoses (44); The dust filtering mechanism (5) includes a processing cover (51) sealed and fixedly connected to the inner wall of the L-shaped bottom plate (1), a square dust cleaning countersunk hole is opened on the side wall of the L-shaped bottom plate (1), and the hole wall of the square dust cleaning countersunk hole is fixedly connected to a sealing cover (52) by bolts, and the air outlet ends of the plurality of conveying hoses (44) are fixedly connected to the outer wall of the processing cover (51), and a bent pipe (53) is fixedly embedded in the upper surface of the processing cover (51), and the bottom end of the bent pipe (53) extends into the interior of the processing cover (51), and the top inner wall of the processing cover (51) is fixedly connected to an external threaded ring (54), and the outer wall of the external threaded ring (54) is threadedly connected to an internal threaded ring (55), and the bottom inner wall of the internal threaded ring (55) is fixedly connected to a composite filter cartridge (56), and the bent pipe (53) is fixedly embedded in the upper surface of the processing cover (51). The air outlet end is fixedly connected to a connecting pipe (57), the bottom end of the connecting pipe (57) is fixedly connected to a powerful suction fan (58), the bottom end of the powerful suction fan (58) is fixedly connected to the inner wall of the L-shaped bottom plate (1), the air outlet end of the powerful suction fan (58) is provided with a through hole, and the hole wall of the through hole is fixedly connected to a wind pressure sensor (59), the air outlet end of the powerful suction fan (58) is fixedly connected to an air guide pipe (510), the air outlet end of the air guide pipe (510) is fixedly connected to a one-way exhaust valve (511), the air outlet end of the one-way exhaust valve (511) is fixedly connected to the outer wall of the compressed air box (10), the top end of the compressed air box (10) is fixedly connected to a pressure relief valve (512), and the upper surface of the compressed air box (10) is fixedly connected to an audible and visual alarm (513); The stone crushing mechanism (8) includes a normally closed electromagnetic valve (81) fixedly connected to the outlet end of the high-pressure air pipe (11), the outlet end of the normally closed electromagnetic valve (81) is fixedly connected to the air cylinder (82), the top end of the air cylinder (82) is fixedly connected to the normally open electromagnetic valve (83), the inner wall of the air cylinder (82) is sealed and movably connected to the piston (84), the bottom end of the piston (84) is fixedly connected to the moving rod (85), the bottom end of the moving rod (85) passes through the bottom end of the air cylinder (82) The movable rod (85) is provided with a through hole and is fixedly connected to a stone crushing hammer (86). The rod wall of the movable rod (85) is movably sleeved with a spring (87). The two ends of the spring (87) are respectively fixedly connected to the lower surface of the piston (84) and the inner wall of the bottom end of the air cylinder (82). The outer wall of the air cylinder (82) is fixedly connected to two handle rods (88), the outer wall of one of the handle rods (88) is fixedly connected to a touch pressure switch (89), and the pipe wall of the high-pressure air pipe (11) is fixedly connected to an auxiliary mechanism (9).

2. The stone transport device for tunnel drilling and blasting engineering according to claim 1, characterized in that: The outer wall of the composite filter cartridge (56) is fixedly sleeved with a protective metal mesh sleeve (12), the top end of the protective metal mesh sleeve (12) is fixedly connected to the outer wall of the internal thread ring (55), and the upper surface of the internal thread ring (55) is fixedly connected with a sealing ring (13).

3. The stone transport device for tunnel drilling and blasting engineering according to claim 1, characterized in that: The auxiliary mechanism (9) comprises a regulating valve (91) fixedly connected to the wall of the high-pressure air pipe (11); the outlet end of the regulating valve (91) is sealedly connected to a silicone hose (92); the outlet end of the silicone hose (92) is fixedly connected to a safety breathing mask (93); and the outer wall of the safety breathing mask (93) is provided with a plurality of outlet holes (94).

4. The stone transport device for tunnel drilling and blasting engineering according to claim 1, characterized in that: A retaining ring (14) is fixedly sleeved on the outer wall of the bottom end of the moving rod (85), and a corrugated sleeve (15) for cable positioning is fixedly sleeved on the outer wall of the high-pressure air pipe (11).

5. The stone transport device for tunnel drilling and blasting engineering according to claim 1, characterized in that: The L-shaped bottom plate (1) and the bottom end of the belt conveyor body (2) are fixedly connected to a plurality of symmetrically distributed universal wheels (7), and two symmetrically distributed electric push rods (17) are fixedly embedded on the lower surface of the L-shaped bottom plate (1), and the movable end of the electric push rod (17) is fixedly connected to a pointed plug rod (16).

6. The stone transport device for tunnel drilling and blasting engineering according to claim 1, characterized in that: The belt conveyor body (2) comprises a housing (21), a conveying belt (22) and a plurality of belt rollers (23); the outer wall of the housing (21) is fixedly connected to a driving motor (24); the output end of the driving motor (24) is fixedly connected to a driving bevel gear (25); the side end of one of the belt rollers (23) is fixedly connected to a driven bevel gear (26) meshing with the driving bevel gear (25); the outer wall of the conveying belt (22) is evenly fixedly embedded with a plurality of metal ridges (27); and the outer wall of the housing (21) is fixedly connected to an L-shaped protective plate (28).

Images