Ventilation detection device for vertical shaft foundation pit

Abstract

The invention discloses a shaft foundation pit ventilation detection device, and particularly relates to the technical field of shaft ventilation, the shaft foundation pit ventilation detection device comprises a comprehensive box, a cabinet door is arranged outside the comprehensive box, two hinges are fixedly mounted on one side of the comprehensive box, the cabinet door is connected with the comprehensive box through the hinges, and an L-shaped plate is fixedly mounted on one side in the comprehensive box; the gas monitoring assembly is arranged on one side of the interior of the L-shaped plate and used for monitoring air in the vertical shaft foundation pit, the gas monitoring assembly comprises a gas detection module, the gas detection module is fixedly installed on one side of the interior of the L-shaped plate, and an air supply pipe is arranged in the comprehensive box. Air pressure distribution of a main air pipe and an air exchange system is balanced, it is ensured that main equipment of the air compressor operates stably, a deep foundation pit air circulation system without an external power source is achieved, the air exchange efficiency is larger than or equal to 0.8 m / min, and the requirement for simultaneous operation of two persons is met.

Description

Technical Field

[0001] This invention relates to the field of vertical shaft foundation pit technology, and more specifically to a vertical shaft foundation pit ventilation detection device. Background Technology

[0002] A vertical shaft is a well-shaped pipe with upright walls. It is actually a type of collapse funnel. In terms of planar outline, it is square, long strip, or irregular circle. The long strip shape is developed along one set of joints, while the square or circle shape is developed along two sets of joints. The well walls are steep and almost vertical. Sometimes, the surface of the underground river can be seen from the vertical shaft. In the critical construction phase of deep foundation pit excavation for power transmission towers in the field, extremely severe environmental challenges are faced. Due to the remote location of the construction site and the weak basic energy supply facilities, traditional ventilation equipment is unable to function effectively in this situation. As a result, the interior of the foundation pit is in a state of air stagnation for a long time, forming a harsh working environment with high concentrations of harmful gases, high temperature and stuffiness, and dust. In this environment, construction workers are exposed to the threat of oxygen deficiency, high temperature and toxic gases such as carbon monoxide and hydrogen sulfide for a long time. Dust problems further aggravate health risks and seriously endanger construction safety and the health of workers. The current solutions, whether relying on diesel or gasoline generators for power or relying on external power to drive ventilation equipment, have significant drawbacks: the former has high energy consumption, the latter has severely limited flexibility, and both cause varying degrees of pollution to the surrounding environment. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a vertical shaft foundation pit ventilation detection device to solve the problems mentioned in the background section.

[0004] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A vertical shaft foundation pit ventilation detection device includes a comprehensive box with an external cabinet door. Two hinges are fixedly installed on one side of the comprehensive box, and the cabinet door is connected to the comprehensive box via the hinges. An L-shaped plate is fixedly installed on one side of the interior of the comprehensive box. A gas monitoring component is located on one side of the L-shaped plate and is used to monitor the air in the vertical shaft foundation pit. The gas monitoring component includes a gas detection module, which is fixedly installed on one side of the L-shaped plate. An air supply pipe is provided inside the comprehensive box. An air valve is fixedly installed on the top surface of the air supply pipe. An air inlet pipe is fixedly installed on the top surface of the air valve. A first tee pipe is fixedly installed on the bottom surface of the air supply pipe. Two connected flexible hoses are fixedly sleeved on the outer circular wall of the first tee pipe. A protective tube is fixedly installed on the outer circular wall of the connected flexible hoses. Several air nozzles are fixedly installed on the outer circular wall of the connected flexible hoses and pass through the outer wall of the connected flexible hoses. A monitoring hole is opened on one side of the comprehensive box, and a blocking net is fixedly installed inside the monitoring hole. The air inlet pipe is connected to an air compressor.

[0005] By adopting the above technical solution and using the gas detection module, when workers monitor the air inside the shaft pit, the integrated box is first placed inside the shaft pit. Then, the gas detection module can monitor the air inside the shaft pit. Since the air inlet pipe is connected to the air compressor outside the pit, when the oxygen inside the shaft pit is thin or harmful gases are detected, the air valve is opened, allowing the air compressor to send air into the air inlet pipe, air valve, and air delivery pipe. The fresh air sent in by the air compressor will then enter the first three-way pipe through the air delivery pipe and disperse into the connected flexible hose. It will then be sprayed out through the nozzle, thus facilitating the injection of fresh air into the pit and enabling rapid air replacement inside the shaft pit.

[0006] Preferably, the integrated box is equipped with an airflow power generation component for generating electricity; the airflow power generation component includes: a second three-way pipe, the second three-way pipe being fixedly sleeved on the outer circular wall of the air supply pipe, the air supply pipe and the second three-way pipe being connected, a gas pressure relief valve being fixedly installed on the bottom surface of the second three-way pipe, an installation shell being provided inside the integrated box, a micro wind turbine being provided inside the installation shell, a connecting pipe being fixedly installed on the outer circular wall of the installation shell, the connecting pipe passing through the installation shell and being fixedly installed on the bottom surface of the gas pressure relief valve.

[0007] By adopting the above technical solution, when a micro wind turbine is installed and power needs to be provided in the vertical shaft pit, the internal air force sent by the air compressor into the air supply pipe enters the interior of the mounting shell through the second three-way pipe and the gas pressure relief valve. Then the wind force will blow the blades of the micro wind turbine to rotate. Subsequently, the airflow from the air compressor drives the high-speed turbine, which, combined with the permanent magnet generator, achieves efficient energy conversion.

[0008] Preferably, a buzzer is fixedly installed on the outside of the gas detection module, an indicator light is fixedly installed on the top surface of the integrated box, and a PLC controller is fixedly installed on one side of the integrated box. The indicator light and the buzzer are electrically connected to the PLC controller.

[0009] By adopting the above technical solution, when the gas detection module detects harmful gas through the set buzzer, it will transmit a signal to the PLC controller. Then, the PLC controller will control the buzzer and indicator light to start, so that the light will be generated at the same time as the alarm sound, so as to promptly remind the staff.

[0010] Preferably, a plurality of lighting lamps are fixedly installed on the outer circular wall surface of the integrated flexible tube. By adopting the above technical solution and installing lighting, a surface illumination function can be achieved inside the vertical shaft pit.

[0011] Preferably, a support plate is fixedly installed on the bottom surface of the L-shaped plate, and a storage battery is fixedly installed inside the support plate. The storage battery is electrically connected to the lighting lamp, the gas detection module and the micro wind turbine.

[0012] By adopting the above technical solution, the micro wind turbine generates energy and stores the electricity inside the battery. The battery then powers the lighting and gas detection module, thus overcoming the problem of safe operation in shaft pits without power supply.

[0013] Preferably, a flat steel support is fixedly installed on one side of the integrated box, and flexible flat steels are respectively provided on both sides of the integrated box. The flexible flat steels are fixedly installed with the protective tube. A spring flat steel rotating screw is provided on the outside of the flexible flat steel, and the spring flat steel rotating screw passes through the flexible flat steel and is connected to the flat steel support.

[0014] By adopting the above technical solution, and by setting up a flexible flat steel, when the vertical shaft pit is completed and the integrated box is stored, the flexible flat steel is rotated to drive the protective pipe and the connecting hose to rotate around the spring flat steel rotating screw, thereby facilitating the symmetrical folding and storage of the two connecting hoses.

[0015] Preferably, the top surface of the integrated box is fixedly installed with two suspension points, and the top of the protective tube is fixedly installed with two suspension hooks.

[0016] By adopting the above technical solution, the integrated box and the connecting hose can be suspended in the lower shaft pit for use.

[0017] Preferably, a fixing frame is provided on one side of the integrated box, and a fixing hole is opened on one side of the fixing frame. A micro drive motor is fixedly sleeved inside the fixing hole. A limiting frame is fixedly installed on one side of the integrated box, and a sliding column is provided on one side of the integrated box. A cleaning brush is fixedly installed on one side of the sliding column. Two movable frames are provided on one side of the limiting frame. Movable grooves are opened on the sides of the two movable frames that are close to each other. Slide plates are slidably connected inside the two movable grooves. A U-shaped frame is fixedly installed on one side of the slide plate. An internal ring gear is fixedly installed on the other side of the slide plate. A spur gear is meshed inside the internal ring gear. The spur gear is fixedly installed with the drive shaft of the micro drive motor. A connecting frame is fixedly installed on one side of the two movable frames, and a limit hole is opened on one side of the fixing frame.

[0018] By adopting the above technical solution, when the gas detection module monitors air in the vertical shaft pit using the cleaning brush, air enters the interior of the integrated box through the monitoring hole and the barrier net. The environment inside the vertical shaft pit is complex, with a lot of pollutants such as mud and dust. Therefore, by using a micro drive motor, the rotation of the drive shaft of the micro drive motor drives the spur gear to rotate, and then the spur gear meshes with and drives the inner ring gear to move. Subsequently, the inner ring gear moves around the spur gear. When the inner ring gear moves, it drives the moving frame, connecting frame, sliding column and cleaning brush to move back and forth up and down. Since the cleaning brush contacts the surface of the barrier net, it can clean the barrier net to ensure that the air in the vertical shaft pit can smoothly enter the interior of the integrated box for detection.

[0019] Preferably, two sliding grooves are provided on one side of the limiting frame, and guide columns are fixedly installed inside the sliding grooves. Two guide holes are provided on the top surface of the movable frame, and the guide columns are slidably connected to the guide holes. Slide rails are fixedly installed on both sides of the interior of the limiting frame, and sliding tables are fixedly installed on both sides of the U-shaped frame. The sliding tables are slidably connected to the slide rails.

[0020] By adopting the above technical solution, the movement of the mobile frame and the sliding plate can be limited.

[0021] Preferably, a bolt is provided on one side of the connecting frame, and the bolt passes through the connecting frame and is threadedly connected to the sliding column.

[0022] The above technical solution is adopted in order to disassemble and replace the sliding column 34.

[0023] In summary, the present invention has the following main beneficial effects: 1. This invention balances the air pressure distribution between the main air pipe and the ventilation system by adjusting the opening of the branch valve, ensuring the stable operation of the main air compressor equipment, realizing a deep pit air circulation system without external power supply, with a ventilation efficiency of ≥0.8m³ / min, meeting the needs of two people working simultaneously.

[0024] 2. This invention utilizes the airflow from an air compressor to drive a micro generator (output power ≥15W) to power the storage battery, testing instruments, and lighting devices, thereby achieving micro-energy self-sufficiency.

[0025] 3. This invention provides uniform lighting within the foundation pit, with a luminous flux of ≥500lm for a single lighting device and a coverage area of ​​≥10m².

[0026] 4. This invention achieves rapid air replacement in the foundation pit by using an annular pipe (diameter 1.5m~2.5m) with 8~10 conical micro-holes (hole diameter 1.5mm) evenly distributed, and by combining fluid dynamics simulation to optimize the injection angle.

[0027] 5. This invention utilizes the airflow from an air compressor to drive a high-speed turbine (speed ≥ 5000 rpm), combined with a permanent magnet generator to achieve efficient energy conversion (efficiency ≥ 25%), and the output electrical energy is stored in a lithium battery pack (capacity ≥ 20000mAh).

[0028] 6. This invention breaks through the technical bottleneck of safe operation of vertical shaft foundation pit in the absence of power supply by integrating "air compressor waste air supply + airflow power generation + environmental monitoring + lighting". Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a perspective structural schematic diagram of the vertical shaft foundation pit ventilation detection device of the present invention; Figure 3 This is a diagram showing the storage structure of the vertical shaft foundation pit ventilation detection device of the present invention; Figure 4 This is a schematic diagram of the integrated flexible tube structure of the present invention; Figure 5 This is a schematic diagram of the integrated box structure of the present invention; Figure 6 This is a schematic diagram of the fixing frame structure of the present invention; Figure 7 This is a schematic diagram of the limiting frame structure of the present invention; Figure 8 This is a schematic diagram of the connecting frame structure of the present invention.

[0030] Attached reference numerals: 1. Integrated box; 2. Cabinet door; 3. Gas detection module; 4. L-shaped plate; 5. Gas supply pipe; 6. Gas valve; 7. Inlet pipe; 8. First tee pipe; 9. Integrated flexible hose; 10. Protective pipe; 11. Nozzle; 12. Monitoring port; 13. Barrier net; 14. Second tee pipe; 15. Miniature wind turbine; 16. Mounting shell; 17. Connecting pipe; 18. Gas pressure relief valve; 19. Nozzle; 20. Indicator light; 21. Battery; 22. Support plate; 23. Flat steel support base; 24. 25. Flexible flat steel; 26. Spring flat steel rotating screw; 27. Suspension hook; 28. Suspension point; 29. ​​Bolt; 30. Lighting lamp; 31. Fixing bracket; 32. Fixing hole; 33. Miniature drive motor; 34. Limiting bracket; 35. Sliding column; 36. Cleaning brush; 37. Moving bracket; 38. U-shaped bracket; 39. Internal ring gear; 40. Spur gear; 41. Slide plate; 42. Connecting bracket; 43. Limiting hole; 44. Moving groove; 45. Sliding groove; 46. Guide column; 47. Guide hole; 48. Slide rail. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example: Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5A vertical shaft foundation pit ventilation detection device includes a comprehensive box 1. The exterior of the comprehensive box 1 has a cabinet door 2. Two hinges are fixedly installed on one side of the comprehensive box 1, and the cabinet door 2 is connected to the comprehensive box 1 via the hinges. An L-shaped plate 4 is fixedly installed on one side of the interior of the comprehensive box 1. A gas monitoring component is installed on one side of the interior of the L-shaped plate 4 to monitor the air in the vertical shaft foundation pit. The gas monitoring component includes a gas detection module 3, which is fixedly installed on one side of the interior of the L-shaped plate 4. An air supply pipe 5 is installed inside the comprehensive box 1. An air valve 6 is fixedly installed on the top surface of the air supply pipe 5. An air inlet pipe 7 is fixedly installed on the top surface of the air valve 6. A first tee pipe 8 is fixedly installed on the bottom surface of the air supply pipe 5. A sleeve is fixed on the outer circular wall of the first tee pipe 8. Two connected hoses 9 are connected. A protective tube 10 is fixedly installed on the outer circular wall of the connected hoses 9. Several air nozzles 11 are fixedly installed on the outer circular wall of the connected hoses 9 and pass through the outer wall of the connected hoses 9. A monitoring hole 12 is opened on one side of the integrated box 1. A blocking net 13 is fixedly installed inside the monitoring hole 12. The air inlet pipe 7 is connected to the air compressor. Two suspension points 27 are fixedly installed on the top surface of the integrated box 1. Two suspension hooks 26 are fixedly installed on the top of the protective tube 10. A buzzer 19 is fixedly installed on the outside of the gas detection module 3. An indicator light 20 is fixedly installed on the top surface of the integrated box 1. A PLC controller is fixedly installed on one side of the integrated box 1. The indicator light 20 and the buzzer 19 are electrically connected to the PLC controller respectively. Using the gas detection module 3, workers place the integrated box 1 into the pit. The gas detection module 3 collects air samples through the monitoring port 12, analyzing in real time the oxygen concentration with an accuracy of ±3%, the detection limit for toxic gases such as CO / H2S ≤10ppm, temperature, humidity, and dust concentration (PM2.5 / PM10). If oxygen is detected to be below the threshold or toxic gases exceed the limit, the signal is transmitted to the PLC controller, triggering the following linkage actions: Audible and visual alarm: the buzzer 19 sounds an alarm, and the indicator light 20 flashes a warning; Forced ventilation: the gas valve 6 is opened. The pneumatically driven ventilation system features an external air compressor that delivers high-pressure airflow through the intake pipe 7. This airflow then passes through the air valve 6 into the delivery pipe 5, and is further branched through the first three-way pipe 8 to two sets of interconnected flexible hoses 9 for efficient air exchange. The ends of the interconnected flexible hoses are equipped with 8-10 annularly distributed jet nozzles 11, with the jet angle optimized using fluid dynamics. This achieves a rapid air circulation and exchange efficiency of ≥0.8 m³ / min within the pit, meeting the needs of two workers. The system also features pressure balance, with branch valves using dynamic pressure regulation technology to adjust the pressure distribution between the main air pipe and branch lines, maintaining stable operation of the air compressor.

[0033] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The integrated box 1 is equipped with an airflow power generation component for generating electricity. The airflow power generation component includes a second three-way pipe 14, which is fixedly sleeved on the outer circular wall of the air supply pipe 5. The air supply pipe 5 and the second three-way pipe 14 are connected. A gas pressure relief valve 18 is fixedly installed on the bottom surface of the second three-way pipe 14. The integrated box 1 is equipped with a mounting shell 16, which is equipped with a micro wind turbine 15. A connecting pipe 17 is fixedly installed on the outer circular wall of the mounting shell 16. The connecting pipe 17 passes through the mounting shell 16 and is fixedly installed on the bottom surface of the gas pressure relief valve 18. When the gas detection module 3 detects harmful gas through the set buzzer 19, it will transmit the signal to the PLC controller. Then, the PLC controller will control the buzzer 19 and the indicator light 20 to start, so that the light will be generated at the same time as the alarm sound, so as to remind the staff in time. refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 Several lighting lamps 29 are fixedly installed on the outer circular wall of the integrated flexible hose 9. A support plate 22 is fixedly installed on the bottom surface of the L-shaped plate 4. A storage battery 21 is fixedly installed inside the support plate 22. The storage battery 21 is electrically connected to the lighting lamps 29, the gas detection module 3 and the micro wind turbine 15 respectively. When the micro wind turbine 15 is installed and power is needed in the vertical shaft pit, the air compressor sends air into the air supply pipe 5 and then into the mounting shell 16 through the second three-way pipe 14 and the gas pressure relief valve 18. The air then blows the blades of the micro wind turbine 15 to rotate. Subsequently, the airflow from the air compressor drives the high-speed turbine, which, combined with the permanent magnet generator, achieves efficient energy conversion. After the micro wind turbine 15 generates energy, it stores the electricity in the battery 21. The battery 21 then powers the lighting 29 and the gas detection module 3, thus overcoming the problem of safe operation in the vertical shaft pit in the absence of power.

[0034] refer to Figure 1 , Figure 2 and Figure 3 A flat steel support base 23 is fixedly installed on one side of the integrated box 1. Flexible flat steel 24 is provided on both sides of the integrated box 1. The flexible flat steel 24 is fixedly installed with the protective tube 10. A spring flat steel rotating screw 25 is provided on the outside of the flexible flat steel 24. The spring flat steel rotating screw 25 passes through the flexible flat steel 24 and connects with the flat steel support base 23. With the flexible flat steel 24 in place, when the vertical shaft pit is completed and the integrated box 1 is stored, the flexible flat steel 24 is rotated to drive the protective pipe 10 and the connecting hose 9 to rotate around the spring flat steel rotating screw 25, which facilitates the symmetrical folding and storage of the two connecting hoses 9.

[0035] refer to Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 A fixed frame 30 is provided on one side of the integrated box 1. A fixed hole 31 is opened on one side of the fixed frame 30. A micro drive motor 32 is fixedly sleeved inside the fixed hole 31. A limiting frame 33 is fixedly installed on one side of the integrated box 1. A sliding column 34 is provided on one side of the integrated box 1. A cleaning brush 35 is fixedly installed on one side of the sliding column 34. Two movable frames 36 are provided on one side of the limiting frame 33. Movable grooves 43 are opened on the side of the two movable frames 36 that are close to each other. A sliding plate 40 is slidably connected inside the two movable grooves 43. A U-shaped frame 37 is fixedly installed on one side of the sliding plate 40. An inner ring gear 38 is fixedly installed on the other side of the sliding plate 40. A spur gear 39 is meshed inside the inner ring gear 38. The spur gear 39 is fixedly installed with the drive shaft of the micro drive motor 32. A connecting frame 41 is fixedly installed on one side of the two movable frames 36. A limit hole 42 is opened on one side of the fixed frame 30. Two sliding grooves 44 are provided on one side of the limiting frame 33. Guide columns 45 are fixedly installed inside the sliding grooves 44. Two guide holes 46 are provided on the top surface of the movable frame 36. The guide columns 45 are slidably connected to the guide holes 46. Slide rails 47 are fixedly installed on both sides of the interior of the limiting frame 33. Sliding tables are fixedly installed on both sides of the U-shaped frame 37. The sliding tables are slidably connected to the slide rails 47. A bolt 28 is provided on one side of the connecting frame 41. The bolt 28 passes through the connecting frame 41 and is threadedly connected to the sliding column 34. When the gas detection module 3 monitors air in the vertical shaft pit using the cleaning brush 35, air enters the interior of the integrated box 1 through the monitoring hole 12 and the barrier net 13. The environment inside the vertical shaft pit is complex, with a lot of pollutants such as mud and dust. Therefore, by using the micro drive motor 32, the rotation of the drive shaft of the micro drive motor 32 will drive the spur gear 39 to rotate. Then, the spur gear 39 will mesh and drive the inner ring gear 38 to move. Subsequently, the inner ring gear 38 will move around the spur gear 39. When the inner ring gear 38 moves, it will drive the moving frame 36, the connecting frame 41, the sliding column 34 and the cleaning brush 35 to move back and forth up and down. Since the cleaning brush 35 contacts the surface of the barrier net 13, it can clean the barrier net 13 to ensure that the air in the vertical shaft pit can smoothly enter the interior of the integrated box 1 for detection.

[0036] Working principle: Please refer to Figures 1-8As shown, this device consists of a comprehensive box 1, a gas detection module 3, a pneumatically driven ventilation system, a micro turbine power generation module, an intelligent control unit, and multifunctional auxiliary components. It is suitable for deep foundation pit scenarios without external power supply. Through the technology of reusing residual air from the air compressor, it realizes an integrated operation process of "ventilation and air exchange - energy self-sufficiency - environmental monitoring - safety early warning". With the gas detection module 3, when the staff monitors the air in the vertical shaft foundation pit, the comprehensive box 1 is first placed inside the vertical shaft foundation pit. Then, the air in the vertical shaft foundation pit can be monitored through the gas detection module 3. Since the air inlet pipe 7 is connected to the air compressor outside the foundation pit, when the oxygen in the vertical shaft foundation pit is thin or harmful gases are detected, the air valve 6 is opened, allowing the air compressor to send air into the air inlet pipe 7, the air valve 6, and the air delivery pipe 5. Then, the fresh air sent in by the air compressor will enter the interior of the first three-way pipe 8 through the air delivery pipe 5 and disperse into the interior of the connected flexible hose 9. Then, it will be sprayed out through the jet nozzle 11, which facilitates the injection of fresh air into the foundation pit to achieve rapid air replacement in the vertical shaft foundation pit.

[0037] When the micro wind turbine 15 is installed and power is needed in the vertical shaft pit, the air compressor sends the air into the air supply pipe 5 and the air enters the interior of the mounting shell 16 through the second three-way pipe 14 and the gas pressure relief valve 18. Then the air will blow the blades of the micro wind turbine 15 to rotate. Subsequently, the air compressor airflow drives the high-speed turbine, which, combined with the permanent magnet generator, achieves efficient energy conversion.

[0038] When the gas detection module 3 detects harmful gas via the buzzer 19, it transmits a signal to the PLC controller. The PLC controller then activates the buzzer 19 and indicator light 20, which simultaneously produce an alarm sound and light to promptly alert staff.

[0039] After the micro wind turbine 15 generates energy through the installed battery 21, it will store the electricity inside the battery 21. Then, the battery 21 will supply power to the lighting lamp 29 and the gas detection module 3, thereby overcoming the problem of safe operation of the vertical shaft pit in the absence of power.

[0040] With the flexible flat steel 24 in place, when the vertical shaft pit is completed and the integrated box 1 is stored, the flexible flat steel 24 is rotated to drive the protective pipe 10 and the connecting hose 9 to rotate around the spring flat steel rotating screw 25, which facilitates the symmetrical folding and storage of the two connecting hoses 9.

[0041] When the gas detection module 3 monitors air in the vertical shaft pit using the cleaning brush 35, air enters the interior of the integrated box 1 through the monitoring hole 12 and the barrier net 13. The environment inside the vertical shaft pit is complex, with a lot of pollutants such as mud and dust. Therefore, by using the micro drive motor 32, the rotation of the drive shaft of the micro drive motor 32 will drive the spur gear 39 to rotate. Then, the spur gear 39 will mesh and drive the inner ring gear 38 to move. Subsequently, the inner ring gear 38 will move around the spur gear 39. When the inner ring gear 38 moves, it will drive the moving frame 36, the connecting frame 41, the sliding column 34 and the cleaning brush 35 to move back and forth up and down. Since the cleaning brush 35 contacts the surface of the barrier net 13, it can clean the barrier net 13 to ensure that the air in the vertical shaft pit can smoothly enter the interior of the integrated box 1 for detection.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ventilation detection device for vertical shaft foundation pits, characterized in that, include: The integrated box has a cabinet door on its exterior, two hinges are fixedly installed on one side of the integrated box, and the cabinet door is connected to the integrated box through the hinges. An L-shaped plate is fixedly installed on one side of the interior of the integrated box. A gas monitoring component, located inside one side of the L-shaped plate, is used to monitor the air inside the shaft pit. The gas monitoring component includes: a gas detection module, which is fixedly installed inside one side of the L-shaped plate; an air supply pipe inside the integrated box; an air valve fixedly installed on the top surface of the air supply pipe; an air inlet pipe fixedly installed on the top surface of the air valve; a first tee pipe fixedly installed on the bottom surface of the air supply pipe; two connected flexible hoses fixedly sleeved on the outer circular wall of the first tee pipe; a protective tube fixedly installed on the outer circular wall of the connected flexible hoses; and several air nozzles fixedly installed on the outer circular wall of the connected flexible hoses, passing through the outer wall of the connected flexible hoses. A monitoring hole is opened on one side of the integrated box, and a blocking mesh is fixedly installed inside the monitoring hole. The air inlet pipe is connected to an air compressor.

2. The vertical shaft foundation pit ventilation detection device according to claim 1, characterized in that, The integrated box is equipped with an airflow power generation component for generating electricity; the airflow power generation component includes: The second three-way pipe is fixedly sleeved on the outer circular wall of the air supply pipe. The air supply pipe and the second three-way pipe are connected. A gas pressure relief valve is fixedly installed on the bottom surface of the second three-way pipe. An installation shell is set inside the integrated box. A micro wind turbine is set inside the installation shell. A connecting pipe is fixedly installed on the outer circular wall of the installation shell. The connecting pipe passes through the installation shell and is fixedly installed on the bottom surface of the gas pressure relief valve.

3. The vertical shaft foundation pit ventilation detection device according to claim 1, characterized in that: A buzzer is fixedly installed on the outside of the gas detection module, an indicator light is fixedly installed on the top surface of the integrated box, and a PLC controller is fixedly installed on one side of the integrated box. The indicator light and the buzzer are electrically connected to the PLC controller.

4. The vertical shaft foundation pit ventilation detection device according to claim 2, characterized in that: Several lights are fixedly installed on the outer circular wall of the integrated flexible tube.

5. The vertical shaft foundation pit ventilation detection device according to claim 4, characterized in that: A support plate is fixedly installed on the bottom surface of the L-shaped plate, and a battery is fixedly installed inside the support plate. The battery is electrically connected to the lighting lamp, the gas detection module and the micro wind turbine.

6. The vertical shaft foundation pit ventilation detection device according to claim 1, characterized in that: A flat steel support base is fixedly installed on one side of the integrated box, and flexible flat steel is provided on both sides of the integrated box. The flexible flat steel is fixedly installed with the protective tube. A spring flat steel rotating screw is provided on the outside of the flexible flat steel, and the spring flat steel rotating screw passes through the flexible flat steel and connects to the flat steel support base.

7. The vertical shaft foundation pit ventilation detection device according to claim 1, characterized in that: The top surface of the integrated box has two fixed suspension points, and the top of the protective tube has two fixed suspension hooks.

8. The vertical shaft foundation pit ventilation detection device according to claim 1, characterized in that: A fixed frame is provided on one side of the integrated box, and a fixed hole is opened on one side of the fixed frame. A micro drive motor is fixedly sleeved inside the fixed hole. A limiting frame is fixedly installed on one side of the integrated box, and a sliding column is provided on one side of the integrated box. A cleaning brush is fixedly installed on one side of the sliding column. Two movable frames are provided on one side of the limiting frame. Movable slots are opened on the side of the two movable frames that are close to each other. Slide plates are slidably connected inside the two movable slots. A U-shaped frame is fixedly installed on one side of the slide plate, and an inner ring gear is fixedly installed on the other side of the slide plate. A spur gear is meshed inside the inner ring gear. The spur gear is fixedly installed with the drive shaft of the micro drive motor. A connecting frame is fixedly installed on one side of the two movable frames, and a limit hole is opened on one side of the fixed frame.

9. The vertical shaft foundation pit ventilation detection device according to claim 8, characterized in that: Two sliding grooves are provided on one side of the limiting frame, and guide columns are fixedly installed inside the sliding grooves. Two guide holes are provided on the top surface of the movable frame, and the guide columns are slidably connected to the guide holes. Slide rails are fixedly installed on both sides of the inside of the limiting frame, and sliding tables are fixedly installed on both sides of the U-shaped frame, with the sliding tables slidably connected to the slide rails.

10. The vertical shaft foundation pit ventilation detection device according to claim 9, characterized in that: A bolt is provided on one side of the connecting frame, and the bolt passes through the connecting frame and is threadedly connected to the sliding column.

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