Tunnel portal geological disaster early warning system

Abstract

The invention relates to the technical field of early warning systems, and discloses a tunnel portal geological disaster early warning system which comprises a main beam, a supporting column is fixedly connected to the lower portion of the main beam, a supporting plate capable of moving up and down is arranged in the main beam, and a mounting plate is arranged below the main beam. The mounting plate is provided with an early warning assembly, the early warning assembly is connected with the supporting plate, a top plate is arranged above the main beam, the top plate is connected with the mounting plate, a pressure sensor is arranged between the top plate and the supporting plate, and an air bag detection assembly is arranged on one side of the mounting plate. The top plate can move downwards to cause numerical value change of the pressure sensor and the distance sensor, so that an alarm is triggered, in addition, the warning board can also turn over and fall down to further remind a driver, and in addition, when vibration and abnormal soil flow occur at the top of the tunnel, gas is transferred into the first gas bag from the second gas bag; the first air bag expands to push the sliding block to move and give an alarm.

Description

Technical Field

[0001] The present invention relates to the field of early warning systems, and in particular to a tunnel portal geological disaster early warning system x. Background Art

[0002] Due to the influence of factors such as ground settlement, soil disturbance, tunnel structure and vehicle vibration, the tunnel structure will undergo deformation such as settlement, cracks and tilt, and in severe cases, tunnel collapse. In order to detect problems in time and reduce the losses caused by such disasters, tunnel disaster warning is a vital task. By discovering possible tunnel disasters in advance, timely alarms can be issued to take corresponding preventive and response measures.

[0003] Tunnel disaster warning is usually based on a variety of monitoring methods and data analysis. The geological conditions are judged through monitoring data results to provide key information for disaster warning work. Early detection of geological disaster crises can take emergency rescue measures in advance to reduce casualties and property losses; it can also provide assistance for rescue work after the disaster occurs, such as setting up warning devices to avoid causing chaos, preventing vehicles outside the tunnel from continuing to enter the tunnel, and preventing the disaster from further expanding. Based on this, the applicant proposed a tunnel entrance geological disaster warning system. Summary of the invention

[0004] In order to solve the technical problems raised in the background technology, the present invention provides a tunnel entrance geological disaster early warning system.

[0005] The present invention is implemented by the following technical solution: a tunnel entrance geological disaster early warning system, comprising a main beam, a support column is fixedly connected below the main beam, and the main beam is also provided with:

[0006] A mounting plate, the mounting plate being arranged below the main beam and having an early warning component mounted thereon;

[0007] A support plate, which is movably installed inside the main beam, can move up and down, and is connected to the early warning component;

[0008] A top plate, wherein the top plate is movably arranged above the main beam, the top plate is connected to the mounting plate, and a pressure sensor is arranged between the top plate and the supporting plate;

[0009] An airbag detection component is arranged on one side of the mounting plate, and the airbag detection component can trigger an alarm of the early warning component.

[0010] Through the above technical solution, firstly, the support plate can move up and down, and a pressure sensor is arranged between the top plate and the mounting plate. When the support plate moves up and down, the pressure sensor value will fluctuate, thereby triggering the alarm of the early warning component. Since the top plate is at the top and is in direct contact with the top of the tunnel, when an accident such as a landslide occurs, the top plate moves downward, and the pressure sensor value will also fluctuate, triggering an alarm. In addition, the airbag detection component is connected to the early warning component, and a part of the airbag detection component is buried in the soil. When the pressure in the soil changes, the alarm will also be triggered through the airbag detection component. When this device is set at the tunnel entrance, it can trigger an alarm in a variety of ways to alert vehicles. Prevent subsequent vehicles from entering the tunnel and prevent the accident from further expanding.

[0011] As a further improvement of the above scheme, the early warning component includes a distance sensor and a detection plate, and two installation grooves are provided on the installation plate. Spring rods are fixedly installed in the two installation grooves, and a slider is slidably installed on the spring rod. The distance sensor and the detection plate are respectively installed on one side of the two sliders.

[0012] As a further improvement of the above scheme, the early warning component also includes a warning light and a buzzer, an electric control box is fixedly connected to the mounting plate, the distance sensor, warning light and buzzer are electrically connected to the electric control cabinet, and the warning light and buzzer are installed at the bottom of the mounting plate.

[0013] Through the above technical solution, when the sliders on both sides move, causing the distance between the distance sensor and the detection plate to increase, an electrical signal is triggered, and the control system in the electric control cabinet controls the warning light and buzzer to turn on, and the warning light and buzzer are used to remind the vehicle driver. The control system in the electric control cabinet is the existing circuit knowledge.

[0014] As a further improvement of the above scheme, a square mounting hole is opened in the middle of the main beam, and a guide column is fixedly connected to the side wall of the mounting hole. The support plate is sleeved on the outside of the guide column, and a second spring is sleeved on the outside of the guide column located below the support plate; an oblique connecting rod is also rotatably connected between the support plate and the slider, and the two ends of the oblique connecting rod are respectively rotatably connected to the lower bottom of the support plate and the slider.

[0015] As a further improvement of the above solution, a pressure sensor is installed on the support plate, a threaded telescopic cylinder is connected above the pressure sensor, and the upper end of the threaded telescopic cylinder abuts against the top plate.

[0016] Through the above technical solution, the support plate can move up and down along the guide column. After the threaded telescopic cylinder and the pressure sensor are installed, a certain pressure value will be displayed on the pressure sensor. At this time, if the top plate drives the threaded telescopic cylinder and the pressure sensor to move downward, the pressure value on the pressure sensor will increase, thereby triggering an electrical signal and the early warning component starts to sound an alarm. On the contrary, if the top plate, the threaded telescopic cylinder and the pressure sensor are in place, the value on the pressure sensor will decrease when the support plate moves downward. This will also trigger an alarm.

[0017] As a further improvement of the above scheme, a through hole is opened on the main beam, and a support shaft is arranged between the top plate and the mounting plate. The upper end of the support shaft is fixedly connected to the top plate, passes through the main beam in the middle, and the lower end is fixedly connected to the mounting plate. At the same time, a first spring is sleeved on the outer side of the support shaft located between the top plate and the main beam.

[0018] Through the above technical solution, during installation, the top plate fits against the top of the tunnel, and the first spring is in a compressed state. The top plate cannot move upward, and the first spring exerts an upward force on the top plate to support the top plate. Therefore, the top plate is fixed. If the top plate does not move, the support shaft and the mounting plate below the support shaft will not move.

[0019] As a further improvement of the above scheme, the airbag detection assembly includes a first airbag, a second airbag and a connecting tube. A first cavity is opened inside the mounting plate and at one end of the mounting groove. The first airbag is arranged in the first cavity. The second airbag is buried in the soil on the top plate. The first airbag and the second airbag are connected by a connecting tube.

[0020] Through the above technical solution, in actual use, a valve can be installed on the connecting pipe. In addition, a space is reserved in the soil above the top plate, and the second airbag is buried in the reserved space, and the second airbag is filled with gas. At this time, the valve is closed. Only when the second airbag is compressed and the internal pressure increases, the valve automatically opens, the gas is transferred to the first airbag, and the first airbag extends. When the first airbag expands and extends from the first cavity, it will push the slider to move. The second airbag can be designed to be spherical, and the contact area of ​​the sphere is large, while the first airbag is designed to be cylindrical, which is convenient for extending from the first cavity to push the slider to move.

[0021] As a further improvement of the above solution, a warning sign is rotatably connected to one side of the mounting plate, a hook is fixedly connected to one side of the warning sign, and a lock plate corresponding to the hook is fixedly connected to the support plate.

[0022] As a further improvement of the above scheme, a wedge block is fixedly connected to one side of the lock plate, and a through hole is provided on the side wall of the main beam, in which a push block is slidably installed, and a third spring is also provided between the push block and the through hole, and one side of the wedge block and the push block is set as an inclined surface.

[0023] Through the above technical solution, in the initial state, the hook is in contact with the lock plate and the hook is locked. When the lock plate moves downward, on the one hand, it is out of contact with the hook and unlocks the warning sign, and on the other hand, the wedge pushes the push block to move. After the push block moves, it pushes the warning sign to rotate around the connection point between itself and the mounting plate. The warning sign rotates 180 degrees and then opens. Adding warning methods further reminds drivers.

[0024] As a further improvement of the above solution, a motor is installed on the mounting plate, one end of the motor is connected to a cam, and a pull plate is provided on one side of the cam, and the upper end of the pull plate is fixedly connected to the support plate.

[0025] Through the above technical solution, the motor cam and the pull plate cooperate to drive the support plate to move downward actively and trigger the alarm. That is, in case of emergency, the alarm can be triggered actively.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] When the top of the tunnel collapses, the roof will move downward, causing the values ​​of the pressure sensor and the distance sensor to change, thereby triggering an alarm. Both the pressure sensor and the distance sensor can trigger an alarm. The combination of the two can avoid the problem that one of them is damaged and the alarm cannot be issued in time in a complex environment. In addition, the warning sign will also flip and fall, further reminding the driver not to enter the tunnel again to avoid more serious accidents.

[0028] The present invention buries the second airbag filled with gas in the soil at the top of the tunnel. When vibration or abnormal soil flow occurs, the gas is transferred to the first airbag, and the first airbag expands to push the slider to move, thereby sounding an alarm to remind relevant personnel to perform inspection and maintenance, thereby avoiding subsequent larger accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention from a first viewing angle;

[0030] Figure 2 It is a schematic diagram of the overall structure of the present invention from a second viewing angle;

[0031] Figure 3 This is a schematic diagram of the connection relationship between the main beam, top plate and mounting plate of the present invention;

[0032] Figure 4 This is a schematic diagram of the connection relationship between the mounting plate and the supporting plate of the present invention;

[0033] Figure 5 A schematic diagram of the connection relationship between the mounting plate and the airbag detection assembly of the present invention;

[0034] Figure 6 This is a schematic diagram of the installation position relationship of the warning sign of the present invention;

[0035] Figure 7 It is a schematic diagram of the connection relationship between the support plate and the push plate of the present invention.

[0036] Explanation of main symbols: 1. Main beam; 2. Support column; 3. Mounting plate; 4. Early warning component; 41. Distance sensor; 42. Detection board; 43. Electric control cabinet; 44. Warning light; 45. Buzzer; 5. Mounting slot; 6. Spring rod; 7. Slider; 8. Mounting hole; 9. Guide column; 10. Support plate; 11. Second spring; 12. Pressure sensor; 13. Threaded telescopic cylinder; 14. Support shaft; 15. First spring; 16. Airbag detection component; 161. First airbag; 162. Second airbag; 163. Connecting pipe; 164. First cavity; 17. Warning sign; 171. Hook; 172. Lock plate; 173. Wedge block; 174. Push block; 175. Third spring; 18. Motor; 19. Cam; 20. Pull plate; 21. Top plate; 22. Diagonal connecting rod. DETAILED DESCRIPTION

[0037] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0038] Embodiment 1:

[0039] Please combine Figure 1-Figure 4 The tunnel entrance geological disaster early warning system of this embodiment includes a main beam 1, and a support column 2 is fixedly connected to the bottom of the main beam 1. The main beam 1 and the support column 2 form a portal structure and can be installed at the tunnel entrance.

[0040] In addition, a top plate 21 is arranged above the main beam 1, and a mounting plate 3 is arranged below the main beam 1. Therefore, the top of the tunnel is generally designed to be arc-shaped, so the top plate 21 is also designed to be arc-shaped, and the top plate 21 fits with the top of the tunnel. A through hole is opened on the main beam 1, and a support shaft 14 is fixedly connected to the lower end of the top plate 21. The support shaft 14 passes through the main beam 1 and is then fixedly connected to the mounting plate 3. And the outer side of the support shaft 14 between the main beam 1 and the top plate 21 is sleeved with a first spring 15. During installation, the top plate 21 fits with the top of the tunnel, and the first spring 15 is in a compressed state. Since the upper end of the top plate 21 is the top of the tunnel, that is, it cannot move upward, and the lower end is the compressed first spring 15, the first spring 15 has an upward force on the top plate 21, and the first spring 15 supports the top plate 21. Therefore, the top plate 21 is fixed. If the top plate 21 does not move, the support shaft 14 and the mounting plate 3 below the support shaft 14 will not move.

[0041] In addition, a square mounting hole 8 is provided in the middle of the main beam 1, and a guide column 9 is fixedly connected to the side wall of the mounting hole 8. In the present embodiment, four guide columns 9 are provided. A support plate 10 is provided in the mounting hole 8, and the support plate 10 is sleeved on the four guide columns 9, that is, the support plate 10 can only move up and down along the direction of the guide columns 9. A second spring 11 is sleeved on the outer side of the guide column 9 located below the support plate 10. The four second springs 11 jointly support the support plate 10. A card plate (not marked in the figure) is fixedly connected to the support plate 10, and a pressure sensor 12 is provided in the card plate. In order to make the pressure sensor 12 work, a threaded telescopic cylinder 13 is provided above the pressure sensor 12 and between the top plate 21. The threaded telescopic cylinder 13 is an existing structure, that is, it is connected by a thread and can be controlled to extend or shorten by rotation. The upper end of the threaded telescopic cylinder 13 is fixedly connected to the lower end surface of the top plate 21 by screws, and the lower end is sleeved on the pressure sensor 12. The threaded telescopic cylinder 13 is rotated to control its length so that the lower end of the pressure sensor 12 fits on the support plate 10. At this time, the pressure sensor 12 has a predetermined pressure value. When the pressure sensor 12 moves downward, the support plate 10 moves downward, the second spring 11 is compressed, and the pressure sensor 12 increases vertically, which can trigger an alarm. If the pressure sensor 12 does not move and the support plate 10 moves downward, the pressure on the pressure sensor 12 decreases vertically, which can also trigger an alarm.

[0042] In order to facilitate triggering the alarm, an early warning component 4 is provided on the mounting plate 3, wherein the early warning component 4 includes a warning light 44 and a buzzer 45, and an electric control cabinet 43. The electric control cabinet 43 is fixedly mounted on the mounting plate 3, and a warning light 44 and a buzzer 45 are fixedly mounted below the mounting plate 3. The pressure sensor 12, the warning light 44 and the buzzer 45 are all electrically connected to the electric control cabinet 43. When the value on the pressure sensor 12 changes significantly (outside the predetermined range), the control system in the electric control cabinet 43 will start the warning light 44 and the buzzer 45, and sound an alarm, which is a common circuit control. In addition, in actual use, a lighting lamp can be normally installed at the bottom of the mounting plate 3.

[0043] In addition, the early warning component 4 also includes a distance sensor 41 and a detection plate 42. The distance sensor 41 also needs to be electrically connected to the electric control cabinet 43. In order to install the distance sensor 41, two left and right mounting grooves 5 are opened on the mounting plate 3, and a spring rod 6 is fixedly installed in the mounting groove 5. A slider 7 is slidably installed on the spring rod 6. The slider 7 is also provided with two left and right sliders, so the distance sensor 41 is installed on one of the sliders 7, and the detection plate 42 is installed on the other slider 7.

[0044] In addition, an oblique connecting rod 22 is provided between the slider 7 and the support plate 10 , that is, the upper end of the oblique connecting rod 22 is rotatably connected to the bottom of the support plate 10 , and the lower end is rotatably connected to the top of the slider 7 .

[0045] Therefore, in summary, due to the push of the spring on the spring rod 6, when no force is applied, the two sliders 7 are close to each other. That is, the distance sensor 41 and the detection plate 42 are close. When the upper support plate 10 moves downward, the sliders 7 on both sides are pushed to move through the oblique connecting rod 22, and the sliders 7 in the two installation grooves 5 move along the spring rod 6 and move away from each other. At this time, the distance sensor 41 triggers a signal, and an alarm is sounded through the electric control cabinet 43, the warning light 44 and the buzzer 45.

[0046] Therefore, when the soil at the top of the tunnel becomes loose and moves downward, and there is a landslide, the top plate 21 will move downward first, and the first spring 15 will be further compressed. The top plate 21 drives the pressure sensor 12 to move downward through the threaded telescopic cylinder 13. At this time, the value on the pressure sensor 12 increases, which can trigger the warning light 44 and the buzzer 45 to alarm. In addition, when the pressure sensor 12 is pressed down, the support plate 10 will also move downward, compressing the second spring 11. When the support plate 10 moves downward, it will drive the sliders 7 on both sides to continue to move along the spring rod 6 and move away from each other through the diagonal connecting rod 22. At this time, the distance between the distance sensor 41 and the detection plate 42 increases, which will also trigger the warning light 44 and the buzzer 45 to alarm, reminding nearby drivers.

[0047] Both the pressure sensor 12 and the distance sensor 41 can trigger an alarm. Since the environment before and after a geological disaster occurs is complex, the combination of the two can avoid the problem that one of them is damaged and an alarm cannot be issued in time.

[0048] In addition, in actual use, plastic plates (not marked in the figure) are provided on both sides of the electric control cabinet 43, the oblique connecting rod 22 and the pressure sensor 12 to provide dust protection. At the same time, when danger occurs and the top plate 21 is pressed down, the thin plastic plate will be damaged and will not affect the warning effect.

[0049] Embodiment 2:

[0050] Combination Figure 5-Figure 7 Based on Example 1, this embodiment is further improved in that:

[0051] An airbag detection assembly 16 is also provided in the mounting plate 3. The airbag detection assembly 16 includes a first airbag 161, a second airbag 162, and a connecting pipe 163 connecting the first airbag 161 and the second airbag 162. In order to install the airbag detection assembly 16, a first cavity 164 is firstly provided in the mounting plate 3 and on one side of the mounting groove 5. The first cavity 164 is in the shape of an elongated cylinder. The first airbag 161 is provided in the first cavity 164, and the second airbag 162 is buried in the soil above the top plate 21. That is, a space for the second airbag 162 is reserved in the soil above the top plate 21, and the second airbag 162 is buried in the soil and filled with soil around. In the initial state, the second airbag 162 is filled with gas. In order to prevent the gas from flowing back into the first airbag 161, a valve (not shown in the figure) can also be installed on the connecting pipe 163 during use. In the initial state, the valve is closed. The gas is kept in the second airbag 162 , and only when the pressure in the second airbag 162 is too high, the valve opens and the gas enters the first airbag 161 .

[0052] During the design and construction, the second airbag 162 is buried in the reserved space in the soil. Therefore, when the soil above the tunnel flows unstably, the reserved space may be destroyed. At this time, the soil squeezes the second airbag 162, and the pressure in the second airbag 162 increases. At this time, the valve opens and the gas is transferred to the first airbag 161. Due to the limitation of the inner wall of the first cavity 164, the first airbag 161 can only expand outward. After the expansion of the first airbag 161, it will contact the slider 7 and push the slider 7 to move. Since the two first airbags 161 will push the two sliders 7 in opposite directions, the distance between the distance sensor 41 and the detection plate 42 increases. Then trigger the alarm. During the design, the second airbag 162 can be designed to be spherical with a large contact area, while the first airbag 161 is designed to be cylindrical, which is convenient for extending from the first cavity 164 to push the slider 7 to move. Therefore, in summary, even if there is no collapse at the top of the tunnel, when the soil at the top of the tunnel flows abnormally, an alarm will be triggered. Remind maintenance personnel and vehicles.

[0053] In addition, the final result of the above alarm method is to trigger the alarm of the buzzer 45 and the warning light 44. In order to further increase the reminder mode, a warning sign 17 is also rotatably connected to one side of the mounting plate 3. The warning sign 17 is rotatably connected to one side of the mounting plate 3.

[0054] When the alarm is not triggered, the warning sign 17 is in a retracted state. Figure 2 , what is displayed at this time is the back side of the warning sign 17, and the words such as "stop" and "forbidden" can be written on the front side of the warning sign 17 (the side facing the main beam 1 at this time).

[0055] As described above, one of the ways to trigger the alarm is to move the support plate 10 downward. In order to facilitate the storage of the display board, a hook 171 is fixedly connected to one side of the warning board 17. In addition, a locking plate 172 is fixedly connected to the push plate. The hook 171 and the locking plate 172 are installed in opposite directions in an "L" shape. Therefore, the warning board 17 can be locked.

[0056] When the support plate 10 moves downward, the lock plate 172 also moves downward and disengages from the hook 171, and the warning sign 17 loses its fixation. In order to ensure that the warning sign 17 can be opened, a through hole is provided at the side wall position of the mounting hole 8 close to the side of the warning sign 17, and a push block 174 is slidably installed in the through hole, and a third spring 175 is provided between the push block 174 and the hole wall. In the disposal state, the push block 174 is away from the warning sign 17. A wedge block 173 is fixedly connected to the above-mentioned lock plate 172, and one side of the wedge block 173 and the push block 174 is set as an inclined surface. Therefore, when the lock plate 172 moves downward with the support plate 10, it first disengages from the hook 171, and then the two inclined surfaces of the wedge block 173 and the push block 174 contact. When the wedge block 173 moves downward, it will push the push block 174 to move toward one side of the warning sign 17, pushing the warning sign 17 away. At this time, it is ensured that the warning sign 17 can be turned 180 degrees, with the front facing the direction of the oncoming vehicle. The text of the warning sign 17 is used to remind the driver.

[0057] Since landslides may occur anywhere in the tunnel, when a landslide occurs in the middle of the tunnel, in addition to emergency rescue, the key is to prevent vehicles outside from continuing to enter the tunnel, causing more serious consequences. Therefore, in actual use, multiple devices of this embodiment can be provided and installed in the tunnel at a certain interval. If a landslide occurs somewhere in the middle of the tunnel, even the early warning devices at the entrances and exits of the tunnel should have the function of actively opening.

[0058] In order to facilitate the active opening of the early warning, a motor 18 is fixedly installed on the mounting plate 3, and a cam 19 is connected to one end of the motor 18. In addition, a pull plate 20 is fixedly connected below the support plate 10. The pull plate 20 is provided with an arc structure adapted to the cam 19. When the cam 19 rotates, the pull plate 20 will be driven to move downward, and the pull plate 20 will drive the support plate 10 to move downward, and the alarm will be triggered. The motor 18 is also electrically connected to the electric control box. That is, when an accident occurs in the middle of the tunnel, the early warning device at the landslide will issue an early warning. Even if the position displacement sensors and distance sensors 41 at the entrance and exit of the tunnel do not trigger the alarm, the alarm can be actively triggered by the motor 18 to prevent subsequent vehicles from continuing to enter the tunnel and avoid further expansion of the accident. How the electric control cabinet 43 at the entrance and exit of the tunnel receives a signal to enable the motor 18 to be actively turned on is a prior art.

[0059] The implementation principle of the tunnel entrance geological disaster early warning system in this application is:

[0060] (I): The top plate 21 is in direct contact with the building layer at the top of the tunnel. When a landslide occurs or the building layer at the top of the tunnel is destroyed and falls, the top plate 21 will move downward first, and the top plate 21 drives the pressure sensor 12 to move downward through the threaded telescopic cylinder 13. At this time, the value on the pressure sensor 12 increases, which can trigger the warning light 44 and the buzzer 45 to alarm. In addition, the support plate 10 will also move downward, and will drive the sliders 7 on both sides to continue to move along the spring rod 6 and move away from each other through the diagonal connecting rod 22. At this time, the distance between the distance sensor 41 and the detection plate 42 increases, which will also trigger the warning light 44 and the buzzer 45 to alarm, reminding nearby drivers. That is, both the pressure sensor 12 and the distance sensor 41 will trigger the alarm. Therefore, the combination of the two can avoid the problem that one of them is damaged in a complex environment and the alarm cannot be issued in time.

[0061] (ii): In addition to the warning light 44 and the buzzer 45 sounding an alarm, when the pallet 10 descends, the lock plate 172 and the hook 171 are disengaged, and at the same time, the push plate pushes the warning sign 17 away, and the warning sign 17 opens. The warning sign 17 is written with words such as "stop" and "forbidden", which can further remind the driver to pay attention.

[0062] (III): Because the second airbag 162 is buried in the soil above the tunnel, and the second airbag 162 is filled with gas. When an earthquake, water seepage or other problems cause the soil to flow, the soil squeezes the second airbag 162, and the pressure in the second airbag 162 increases. At this time, the valve opens and the gas is transferred to the first airbag 161. Due to the limitation of the inner wall of the first cavity 164, the first airbag 161 can only expand outward. After the expansion of the first airbag 161, it will contact the slider 7 and push the slider 7 to move. Repeating the above process, the movement of the slider 7 causes the distance sensor 41 to trigger a signal and sound an alarm. Therefore, when the building layer at the top of the tunnel has not been destroyed, that is, when the top plate 21 has not moved downward, due to the movement of the soil above the tunnel, signs of an accident appear, and an alarm will also be sounded to remind relevant personnel to inspect and maintain. Avoid larger accidents.

[0063] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A tunnel entrance geological disaster early warning system, characterized in that: It includes a main beam, a support column is fixedly connected below the main beam, and the main beam is also provided with: A mounting plate, the mounting plate being arranged below the main beam and having an early warning component mounted thereon; A support plate, which is movably installed inside the main beam, can move up and down, and is connected to the early warning component; A top plate, wherein the top plate is movably arranged above the main beam, the top plate is connected to the mounting plate, and a pressure sensor is arranged between the top plate and the supporting plate; An airbag detection component is arranged on one side of the mounting plate, and the airbag detection component can trigger an alarm of the early warning component.

2. The tunnel entrance geological disaster early warning system according to claim 1, characterized in that: The early warning component includes a distance sensor and a detection plate. Two installation grooves are provided on the installation plate. Spring rods are fixedly installed in the two installation grooves. Slide blocks are slidably installed on the spring rods. The distance sensor and the detection plate are respectively installed on one side of the two slide blocks.

3. The tunnel entrance geological disaster early warning system according to claim 2, characterized in that: The early warning component also includes a warning light and a buzzer. An electric control box is fixedly connected to the mounting plate. The distance sensor, the warning light and the buzzer are electrically connected to the electric control cabinet. The warning light and the buzzer are installed at the bottom of the mounting plate.

4. The tunnel entrance geological disaster early warning system according to claim 2, characterized in that: A square mounting hole is provided in the middle of the main beam, and a guide column is fixedly connected to the side wall of the mounting hole. The support plate is sleeved on the outside of the guide column, and a second spring is sleeved on the outside of the guide column located below the support plate; an oblique connecting rod is also rotatably connected between the support plate and the slider, and both ends of the oblique connecting rod are rotatably connected to the lower bottom of the support plate and the slider respectively.

5. The tunnel entrance geological disaster early warning system according to claim 1, characterized in that: A pressure sensor is installed on the support plate, a threaded telescopic cylinder is connected above the pressure sensor, and the upper end of the threaded telescopic cylinder abuts against the top plate.

6. The tunnel entrance geological disaster early warning system according to claim 1, characterized in that: A through hole is opened on the main beam, and a support shaft is arranged between the top plate and the mounting plate. The upper end of the support shaft is fixedly connected to the top plate, passes through the main beam in the middle, and the lower end is fixedly connected to the mounting plate. At the same time, a first spring is sleeved on the outer side of the support shaft located between the top plate and the main beam.

7. The tunnel entrance geological disaster early warning system according to claim 2, characterized in that: The airbag detection assembly includes a first airbag, a second airbag and a connecting tube. A first cavity is opened inside the mounting plate and at one end of the mounting groove. The first airbag is arranged in the first cavity. The second airbag is buried in the soil on the top plate. The first airbag and the second airbag are connected by a connecting tube.

8. The tunnel entrance geological disaster early warning system according to claim 1, characterized in that: A warning sign is rotatably connected to one side of the mounting plate, a hook is fixedly connected to one side of the warning sign, and a locking plate corresponding to the hook is fixedly connected to the supporting plate.

9. The tunnel entrance geological disaster early warning system according to claim 8, characterized in that: A wedge block is fixedly connected to one side of the lock plate, and a through hole is provided on the side wall of the main beam, in which a push block is slidably installed, a third spring is also provided between the push block and the through hole, and one side of the wedge block and the push block is set as an inclined surface.

10. The tunnel entrance geological disaster early warning system according to claim 1, characterized in that: A motor is installed on the mounting plate, one end of the motor is connected to a cam, and a pull plate is provided on one side of the cam, and the upper end of the pull plate is fixedly connected to the supporting plate.

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