A deep foundation pit safety protection device for building construction

Abstract

This invention relates to the field of foundation pit safety protection technology, specifically a deep foundation pit safety protection device for construction. It includes a protective box, and further includes: a ground-breaking ventilation structure connected to the protective box, the ground-breaking ventilation structure including a protective cover, a ventilation fan fixedly connected to the protective cover, a lifting and drilling mechanism connected to the protective cover, a first drill rod movably connected to the lifting and drilling mechanism, a ring drill bit fixedly connected to the first drill rod, a pushing and docking mechanism installed inside the protective cover, multiple sets of second drill rods connected to the pushing and docking mechanism, and connectors for the second drill rods; a closed rainproof mechanism connected to the protective box; and an independent oxygen supply mechanism connected to the protective box. This invention, through the coordinated operation of the ground-breaking ventilation structure, the closed rainproof mechanism, and the independent oxygen supply mechanism, maintains air inside the protective box by drilling through the ground after personnel are buried underground, and provides location indication for ground rescue personnel, thereby improving the survival rate of refugees and increasing rescue efficiency.

Description

Technical Field

[0001] This invention relates to the field of foundation pit safety protection technology, specifically a deep foundation pit safety protection device for building construction. Background Technology

[0002] Deep foundation pits refer to projects with an excavation depth exceeding 5 meters or more than three basement levels, or projects with particularly complex geological conditions, surrounding environment, and underground pipelines even if the depth does not exceed 5 meters. During earthwork excavation, measures should be taken to prevent subsidence and deformation of adjacent buildings, structures, roads, pipelines, etc. If necessary, consultation should be held with the design unit or construction unit to take protective measures, and settlement or displacement monitoring should be carried out during construction.

[0003] During deep foundation pit construction, in order to avoid serious accidents caused by collapse, it is often necessary to set up safety protection devices to provide temporary shelter for personnel. However, ordinary deep foundation pit safety protection devices can only achieve the effect of retaining soil. Once the safety protection device is buried, firstly, the personnel will die due to lack of oxygen. Secondly, the soil covering will make it impossible for rescuers to directly determine the location of the buried personnel, resulting in low rescue efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a safety protection device for deep foundation pits in building construction, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A safety protection device for deep foundation pits used in building construction includes a protective box, an independent power supply fixedly installed inside the protective box, an electric door installed inside the protective box, and further includes:

[0007] A soil-breaking and ventilation structure connected to a protective box includes a protective cover fixedly connected to the protective box, a soil outlet hole at the bottom of the protective cover, a ventilation fan fixedly connected to the protective cover, a lifting and drilling mechanism connected to the protective cover, a first drill rod movably connected to the lifting and drilling mechanism, a ring drill bit fixedly connected to the first drill rod, a pushing and docking mechanism fixedly installed inside the protective cover, and multiple sets of second drill rods movably connected to the pushing and docking mechanism. Limiting straight grooves are formed on the outer surfaces of both the first and second drill rods. A matching joint, which is magnetic, is fixedly connected to the second drill rod. Both the first and second drill rods are ferromagnetic and hollow. A soil collection and diversion component is located below the soil outlet hole for collecting excavated soil. The soil collection and diversion component is fixedly connected to the protective box.

[0008] An enclosed rainproof mechanism connected to the protective box, wherein the enclosed rainproof mechanism is located above the first drill rod;

[0009] An independent oxygen supply mechanism connected to the protective box is used for oxygen storage and release operations.

[0010] As a further improvement of the present invention: the lifting drilling mechanism includes a first motor fixedly connected to the protective cover, a first lead screw fixedly connected to the output shaft of the first motor, a linkage frame threadedly connected to the first lead screw, a guide strip fixedly installed inside the protective cover slidably connected to the linkage frame, a housing fixedly connected to the linkage frame, a second motor fixedly connected to the housing, a gear disposed inside the housing fixedly connected to the output shaft of the second motor, a gear meshing with a gear ring, a cylinder fixedly connected to the gear ring coaxially, the cylinder rotatably connected to the housing, and the housing driving the cylinder to perform lifting operations through a protruding ring, multiple sets of first limiting telescopic components fixedly connected to the cylinder, and multiple sets of second limiting telescopic components fixedly connected to the protective cover, both the first and second limiting telescopic components being movably connected to the limiting straight groove of the first drill rod.

[0011] As a further improvement of the present invention: both the first limiting telescopic component and the second limiting telescopic component include a sleeve, a first electric telescopic rod is fixedly installed in the sleeve, the moving end of the first electric telescopic rod is fixedly connected to a bracket that is slidably connected to the sleeve, the bracket is movably connected to the limiting straight groove of the first drill rod, the sleeve of the first limiting telescopic component is fixedly connected to the cylinder, and the sleeve of the second limiting telescopic component is fixedly connected to the protective cover.

[0012] As a further improvement of the present invention: the pushing docking mechanism includes an annular fixed frame fixedly connected to the inner wall of the protective cover. The annular fixed frame is fixedly connected to multiple sets of hinge seats. The hinge seats are hinged to a second electric telescopic rod. The moving end of the second electric telescopic rod is hinged to a moving frame. The moving frame is fixedly connected to two sets of rectangular blocks. Each set of rectangular blocks is slidably connected to a set of L-shaped frames. The L-shaped frames are fixedly connected to the hinge seats. The moving frame is fixedly connected to a dual-output shaft motor. The output end of the dual-output shaft motor is fixedly connected to a second lead screw. The second lead screw is threadedly connected to a clamping arm slidably connected to the moving frame. The clamping arm is movably connected to the limiting straight groove of the second drill rod.

[0013] As a further improvement of the present invention: the soil collection and diversion component includes a soil collection box disposed below the soil outlet hole, the soil collection box having an opening facing the soil outlet hole, and inclined surfaces symmetrically disposed inside the soil collection box.

[0014] As a further improvement of the present invention: the closed rainproof mechanism includes an annular cover fixedly installed on the top of the protective box, the annular cover is bonded with multiple sets of triangular plates arranged circumferentially, two adjacent sets of triangular plates are bonded to each other, and the triangular plates are arranged above the annular drill bit.

[0015] As a further improvement of the present invention: the independent oxygen supply mechanism includes an oxygen storage tank fixedly connected to the protective box, an air pump fixedly connected to the oxygen storage tank, a first air exchange pipe fixedly connected to the air pump, an exhaust gas box fixedly connected to the protective box, a vacuum pump fixedly connected to the exhaust gas box, and a second air exchange pipe fixedly connected to the vacuum pump.

[0016] As a further improvement of the present invention: a rotating frame is rotatably mounted on the top of the protective box, and the rotating frame is slidably connected to the first drill rod.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The lifting and drilling mechanism raises the height of the first drill rod, causing the annular drill bit to open the closed rainproof mechanism. Then, the lifting and drilling mechanism drives the first drill rod to rotate, causing the annular drill bit to rise during rotation, so that the first drill rod drills into the soil layer buried on the protective box. Then, the pushing and docking mechanism moves the second drill rod to below the first drill rod and docks the connector with the first drill rod. Then, the lifting and drilling mechanism drives the docked second drill rod to rotate and rise to continue the rising and drilling operation. During this process, the drilled soil falls into the soil collection and diversion component through the hollow first and second drill rods, so that the soil collection and diversion component collects the excavated soil. As the second drill rod is continuously assembled and arranged in a straight line, the annular drill bit drills out of the soil layer. Then, the ventilation fan is activated to carry out ventilation operations in the protective box, maintain the air in the protective box, and improve the survival rate of the refugees.

[0019] 2. As the second drill rod is continuously assembled and arranged along a straight line, the annular drill bit drills out of the soil layer. Since the first drill rod has drilled out of the soil layer, the ground search and rescue personnel can determine the position of the protective box by the position of the first drill rod, so as to carry out precise rescue, provide location indication for the ground rescue personnel, and improve rescue efficiency. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 For the present invention Figure 1 A magnified view of a portion of point A in the middle;

[0022] Figure 3 This is a schematic diagram of the internal three-dimensional structure of the soil-breaking and ventilation structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the soil-breaking and ventilation structure of the present invention from another perspective.

[0024] Figure 5 This is a schematic diagram of the internal three-dimensional structure of the present invention;

[0025] Figure 6 For the present invention Figure 5 A magnified view of a portion of point B in the middle;

[0026] Figure 7 This is a three-dimensional cross-sectional view of the rotating frame of the present invention;

[0027] Figure 8 This is a schematic diagram of the internal three-dimensional structure of the housing of the present invention;

[0028] Figure 9 This is a schematic diagram of the structure of the housing, cylinder, protruding ring, and first limiting telescopic component of the present invention in cooperation with each other;

[0029] Figure 10 This is a schematic diagram of the structure of the first limiting telescopic component of the present invention;

[0030] Figure 11 This is a three-dimensional structural diagram of the second drill rod, the limiting straight groove, and the butt joint of the present invention in cooperation with each other;

[0031] Figure 12 This is a three-dimensional structural diagram of the partial push-and docking mechanism, the second drill pipe, and the docking joint of the present invention in cooperation with each other;

[0032] Figure 13 This is a schematic diagram of the structure of the partial push docking mechanism of the present invention and the second drill pipe cooperating with each other.

[0033] In the diagram: 1. Protective box; 2. Independent power supply; 3. Electric door; 4. Soil-breaking and ventilation structure; 5. Protective cover; 6. Soil outlet; 7. Ventilation fan; 8. Lifting and drilling mechanism; 9. First drill rod; 10. Ring drill bit; 11. Pushing and docking mechanism; 12. Second drill rod; 13. Limiting straight groove; 14. Connecting joint; 15. Soil collection and diversion assembly; 16. Enclosed rainproof mechanism; 17. Independent oxygen supply mechanism; 18. First motor; 19. First lead screw; 20. Linkage frame; 21. Guide bar; 22. Housing; 23. Second motor; 24. Gear; 25. Gear ring; 26. Cylinder; 27. 28. Protruding ring; 29. ​​First limiting telescopic assembly; 30. Second limiting telescopic assembly; 31. Sleeve; 32. First electric telescopic rod; 33. Insert bracket; 34. Second electric telescopic rod; 35. Moving frame; 36. Rectangular block; 37. L-shaped frame; 38. Dual-shaft motor; 39. Second lead screw; 40. Clamping arm; 41. Soil collection box; 42. Inclined surface; 43. Annular cover; 44. Triangular plate; 45. Oxygen storage box; 46. Air pump; 47. First ventilation pipe; 48. Waste gas box; 49. Vacuum pump; 50. Second ventilation pipe; 51. Rotating frame; 52. Annular fixed frame; 53. Hinge seat. Detailed Implementation

[0034] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0035] Example 1, see Figures 1 to 13 As shown, a safety protection device for deep foundation pits used in building construction includes a protective box 1, an independent power supply 2 fixedly installed inside the protective box 1, an electric door 3 installed inside the protective box 1, a control panel installed inside the protective box 1, and further includes:

[0036] A soil-breaking and ventilation structure 4 is connected to the protective box 1. The soil-breaking and ventilation structure 4 includes a protective cover 5 fixedly connected to the protective box 1. The bottom of the protective cover 5 has a soil outlet hole 6. A ventilation fan 7 is fixedly connected to the protective cover 5. A lifting and drilling mechanism 8 is connected to the protective cover 5. A first drill rod 9 is movably connected to the lifting and drilling mechanism 8. A ring drill bit 10 is fixedly connected to the first drill rod 9. A pushing and docking mechanism 11 is fixedly installed inside the protective cover 5. Multiple sets of second drill rods 12 are movably connected to the pushing and docking mechanism 11. Limiting grooves 13 are formed on the outer surfaces of the first drill rod 9 and the second drill rod 12. The second drill rod 12 is fixedly connected to a connector 14 that matches the shape of the limiting groove 13 of the first drill rod 9. The connector 14 is magnetic. Both the first drill rod 9 and the second drill rod 12 are ferromagnetic. Both the first drill rod 9 and the second drill rod 12 are hollow structures. A soil collection and diversion component 15 is provided below the soil outlet hole 6. The soil collection and diversion component 15 is used for collecting slag and soil. The soil collection and diversion component 15 is fixedly connected to the protective box 1.

[0037] A closed rainproof mechanism 16 is connected to the protective box 1, and the closed rainproof mechanism 16 is located above the first drill rod 9;

[0038] An independent oxygen supply mechanism 17 is connected to the protective box 1. The independent oxygen supply mechanism 17 is used for oxygen storage and release operations.

[0039] In use, the lower half of the protective box 1 is buried in the ground so that the lower end of the electric door 3 is flush with the ground. After personnel enter the protective box 1, the electric door 3 is closed via the control panel. After the protective box 1 is buried underground, the control panel activates the lifting and drilling mechanism 8. The lifting and drilling mechanism 8 raises the height of the first drill rod 9, causing the annular drill bit 10 to push open the rainproof sealing mechanism 16. Then, the lifting and drilling mechanism 8 drives the first drill rod 9 to rotate, causing the first drill rod 9 to drive the annular drill bit 10 to rise during rotation, so that the first drill rod 9 drills into the soil layer buried on the protective box 1. Then, the pushing and docking mechanism 11 moves the second drill rod 12 below the first drill rod 9, so that the docking joint 14 is connected to the first drill rod 12. The first drill rod 9 is connected to the second drill rod 12, and then the lifting drilling mechanism 8 drives the connected second drill rod 12 to rotate and rise to continue the upward drilling operation. During this process, the drilled soil falls into the soil collection and diversion component 15 through the hollow first drill rod 9 and the second drill rod 12, so that the soil collection and diversion component 15 can collect the excavated soil. As the second drill rod 12 is continuously assembled and arranged in a straight line, the annular drill bit 10 drills out of the soil layer, and then the ventilation fan 7 is started to ventilate the protective box 1. Since the first drill rod 9 has drilled out of the soil layer, the ground search and rescue personnel can determine the position of the protective box 1 by the position of the first drill rod 9, so as to carry out precise rescue. During this period, the independent oxygen supply mechanism 17 provides oxygen to maintain the vital signs of the personnel. This invention, through the cooperation of the soil breaking and ventilation structure 4, the closed rainproof mechanism 16, and the independent oxygen supply mechanism 17, maintains the air in the protective box 1 by drilling through the ground after the personnel are buried underground, and provides the location indication for the ground rescue personnel, thereby improving the survival rate of the refugees and improving the rescue efficiency.

[0040] In one embodiment, the lifting drilling mechanism 8 includes a first motor 18 fixedly connected to the protective cover 5. The output shaft of the first motor 18 is fixedly connected to a first lead screw 19. The first lead screw 19 is threadedly connected to a linkage frame 20. The linkage frame 20 is slidably connected to a guide strip 21 fixedly installed inside the protective cover 5. The linkage frame 20 is fixedly connected to a housing 22. The housing 22 is fixedly connected to a second motor 23. The output shaft of the second motor 23 is fixedly connected to a gear 24 disposed inside the housing 22. The gear 24 meshes with a gear ring 25. The gear ring 25 is coaxially fixedly connected to a cylinder 26. The cylinder 26 is rotatably connected to the housing 22. The housing 22 drives the cylinder 26 to perform lifting operations through a protruding ring 27. The cylinder 26 is fixedly connected to multiple sets of first limiting telescopic components 28. The protective cover 5 is fixedly connected to multiple sets of second limiting telescopic components 29. Both the first limiting telescopic components 28 and the second limiting telescopic components 29 are movably connected to the limiting straight groove 13 of the first drill rod 9. After multiple sets of first limiting telescopic components 28 jointly press the limiting straight groove 13 of the first drill rod 9, the second motor 23 drives the gear 24 to rotate, the gear 24 drives the gear ring 25 to rotate, and the gear ring 25 drives the cylinder 26 to rotate. During this period, because the housing 22 provides rotation limit for the protruding ring 27, the rotating cylinder 26 drives the first limiting telescopic component 28 to rotate, so that the first drill rod 9 rotates. The first motor 18 drives the first lead screw 19 to rotate, and the first lead screw 19 drives the linkage frame 20 to move linearly up and down along the guide bar 21. The moving linkage frame 20 drives the housing 22 to move, and the housing 22 drives the cylinder 26 to move up and down through the protruding ring 27, thereby adjusting the height of the first limiting telescopic component 28 and the first drill rod 9 so that the first drill rod 9 rotates and rises, thereby realizing the rising drilling operation. When it is necessary to install a set of second drill rods 12 below the first drill rod 9, the second motor 23 stops rotating, and the second The limiting telescopic component 29 abuts against the limiting straight groove 13 of the first drill rod 9, thereby restricting the first drill rod 9 from falling. Then, the pushing docking mechanism 11 moves the second drill rod 12 to below the first drill rod 9 and lifts it, so that the connector 14 on the second drill rod 12 is inserted into the limiting straight groove 13 of the first drill rod 9. If two sets of second drill rods 12 are docked, the second drill rod 12 that is abutted and limited by the second limiting telescopic component 29 is the second drill rod 12 in the drilling soil, and the connector 14 docks with the set of second drill rods 12 arranged above the second drill rod 12 closest to the second drill rod 12 to be installed. After the connector 14 completes the docking operation, the lifting drilling mechanism 8 clamps and fixes the second drill rod 12 installed at the bottom layer. After the second limiting telescopic component 29 retracts, the lifting drilling mechanism 8 continues to drive the second drill rod 12 to rotate and rise, so as to achieve the effect of extending the drilling length of the present invention, and at the same time realize automated drilling and assembly, saving the physical strength of refuge personnel.

[0041] In one embodiment, both the first limiting telescopic component 28 and the second limiting telescopic component 29 include a sleeve 30. A first electric telescopic rod 31 is fixedly installed inside the sleeve 30. The power supply method of the first electric telescopic rod 31 can be wireless or mechanical contact power supply. The moving end of the first electric telescopic rod 31 is fixedly connected to a bracket 32 ​​that is slidably connected to the sleeve 30. The bracket 32 ​​is movably connected to the limiting straight groove 13 of the first drill rod 9. The sleeve 30 of the first limiting telescopic component 28 is fixedly connected to the cylinder 26, and the sleeve 30 of the second limiting telescopic component 29 is fixedly connected to the protective cover 5. The first electric telescopic rod 31 drives the bracket 32 ​​to move, so that the bracket 32 ​​abuts against the limiting straight groove 13, thereby enabling the first limiting telescopic component 28 or the second limiting telescopic component 29 to perform clamping and fixing operations on the first drill rod 9 or the second drill rod 12.

[0042] In one embodiment, the pushing and docking mechanism 11 includes an annular fixing frame 51 fixedly connected to the inner wall of the protective cover 5. The annular fixing frame 51 is fixedly connected to multiple sets of hinge seats 52. The hinge seats 52 are hinged to a second electric telescopic rod 33. The moving end of the second electric telescopic rod 33 is hinged to a moving frame 34. The moving frame 34 is fixedly connected to two sets of rectangular blocks 35. Each set of rectangular blocks 35 is slidably connected to a set of L-shaped frames 36. The L-shaped frames 36 are fixedly connected to the hinge seats 52. The moving frame 34 is fixedly connected to a dual-output shaft motor 37. The output end of the dual-output shaft motor 37 is fixedly connected to a second lead screw 38. The second lead screw 38 is threadedly connected to a clamping arm 39 slidably connected to the moving frame 34. The clamping arm 39 is movably connected to the limiting straight groove 13 of the second drill rod 12. The dual-output shaft motor 37 drives the second lead screw 38 to rotate, the second lead screw 38 drives the clamping arm 39 to rotate, the clamping arm 39 clamps the second drill rod 12, the second electric telescopic rod 33 drives the moving frame 34 to move, the moving frame 34 drives the rectangular block 35 to slide along the L-shaped frame 36, under the guidance of the L-shaped frame 36 on the rectangular block 35, the moving frame 34 moves along the L-shaped trajectory, the moving frame 34 drives the dual-output shaft motor 37 to move, thereby moving the second drill rod 12 to adjust the position of the second drill rod 12.

[0043] In one embodiment, the soil collection and diversion assembly 15 includes a soil collection box 40 disposed below the soil outlet hole 6. The soil collection box 40 has an opening facing the soil outlet hole 6, and inclined surfaces 41 are symmetrically arranged inside the soil collection box 40. By setting the soil collection box 40 and the inclined surfaces 41, the excavated soil falling from the soil outlet hole 6 can be guided and collected, avoiding continuous contact between the excavated soil and the bottom of the first drill rod 9.

[0044] In one embodiment, the enclosed rainproof mechanism 16 includes an annular cover 42 fixedly installed on the top of the protective box 1. Multiple sets of triangular plates 43 arranged circumferentially are bonded to the annular cover 42, with adjacent sets of triangular plates 43 bonded together. The triangular plates 43 are positioned above the annular drill bit 10. Under normal circumstances, the bonded triangular plates 43 seal the annular cover 42, preventing rainwater from entering the invention. When the annular drill bit 10 pushes against the triangular plates 43, the triangular plates 43 separate from each other and detach from the annular cover 42, thus facilitating the annular drill bit 10 to pass through the annular cover 42 and enter the soil layer.

[0045] In one embodiment, the independent oxygen supply mechanism 17 includes an oxygen storage tank 44 fixedly connected to the protective box 1. The oxygen storage tank 44 is fixedly connected to a vacuum pump 45, which is fixedly connected to a first ventilation pipe 46. The protective box 1 is fixedly connected to a waste gas tank 47, which is fixedly connected to a vacuum pump 48, which is fixedly connected to a second ventilation pipe 49. The oxygen storage tank 44 stores oxygen, and the waste gas tank 47 stores waste gas. The vacuum pump 45 delivers oxygen from the oxygen storage tank 44 into the protective box 1 through the first ventilation pipe 46. The vacuum pump 48 extracts waste gas from the protective box 1 through the second ventilation pipe 49 and compresses the waste gas into the waste gas tank 47 to prevent excessive pressure inside the protective box 1 while maintaining the oxygen content within the protective box 1.

[0046] Example 2, based on Example 1, see [link / reference] Figures 5-7 A rotating frame 50 is rotatably mounted on the top of the protective box 1, and the rotating frame 50 is slidably connected to the first drill rod 9. The rotating frame 50 is designed to shield the collapsed debris.

[0047] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A safety protection device for deep foundation pits used in building construction, comprising a protective box, an independent power supply fixedly installed inside the protective box, and an electric door installed inside the protective box, characterized in that, Also includes: A soil-breaking and ventilation structure connected to a protective box includes a protective cover fixedly connected to the protective box, a soil outlet hole at the bottom of the protective cover, a ventilation fan fixedly connected to the protective cover, a lifting and drilling mechanism connected to the protective cover, a first drill rod movably connected to the lifting and drilling mechanism, a ring drill bit fixedly connected to the first drill rod, a pushing and docking mechanism fixedly installed inside the protective cover, and multiple sets of second drill rods movably connected to the pushing and docking mechanism. Limiting straight grooves are formed on the outer surfaces of both the first and second drill rods. A matching joint, which is magnetic, is fixedly connected to the second drill rod. Both the first and second drill rods are ferromagnetic and hollow. A soil collection and diversion component is located below the soil outlet hole for collecting excavated soil. The soil collection and diversion component is fixedly connected to the protective box. An enclosed rainproof mechanism connected to the protective box, wherein the enclosed rainproof mechanism is located above the first drill rod; An independent oxygen supply mechanism connected to the protective box is used for oxygen storage and release operations.

2. The deep foundation pit safety protection device for building construction according to claim 1, characterized in that, The lifting and drilling mechanism includes a first motor fixedly connected to a protective cover. The output shaft of the first motor is fixedly connected to a first lead screw. The first lead screw is threadedly connected to a linkage frame. The linkage frame is slidably connected to a guide strip fixedly installed inside the protective cover. The linkage frame is fixedly connected to a housing. The housing is fixedly connected to a second motor. The output shaft of the second motor is fixedly connected to a gear disposed inside the housing. The gear meshes with a gear ring. The gear ring is coaxially fixedly connected to a cylinder. The cylinder is rotatably connected to the housing. The housing drives the cylinder to lift and lower via a protruding ring. The cylinder is fixedly connected to multiple sets of first limiting and telescopic components. The protective cover is fixedly connected to multiple sets of second limiting and telescopic components. Both the first and second limiting and telescopic components are movably connected to the limiting straight groove of the first drill rod.

3. A safety protection device for deep foundation pits in building construction according to claim 2, characterized in that, Both the first limiting telescopic component and the second limiting telescopic component include a sleeve. A first electric telescopic rod is fixedly installed inside the sleeve. The moving end of the first electric telescopic rod is fixedly connected to a bracket that is slidably connected to the sleeve. The bracket is movably connected to the limiting straight groove of the first drill rod. The sleeve of the first limiting telescopic component is fixedly connected to the cylinder. The sleeve of the second limiting telescopic component is fixedly connected to the protective cover.

4. A safety protection device for deep foundation pits in building construction according to claim 1, characterized in that, The pushing and docking mechanism includes an annular fixed frame fixedly connected to the inner wall of the protective cover. The annular fixed frame is fixedly connected to multiple sets of hinge seats. The hinge seats are hinged to a second electric telescopic rod. The moving end of the second electric telescopic rod is hinged to a moving frame. The moving frame is fixedly connected to two sets of rectangular blocks. Each set of rectangular blocks is slidably connected to a set of L-shaped frames. The L-shaped frames are fixedly connected to the hinge seats. The moving frame is fixedly connected to a dual-output shaft motor. The output end of the dual-output shaft motor is fixedly connected to a second lead screw. The second lead screw is threadedly connected to a clamping arm slidably connected to the moving frame. The clamping arm is movably connected to the limiting straight groove of the second drill rod.

5. A safety protection device for deep foundation pits in building construction according to claim 1, characterized in that, The soil collection and diversion assembly includes a soil collection box located below the soil outlet hole. The soil collection box has an opening facing the soil outlet hole, and inclined surfaces are symmetrically arranged inside the soil collection box.

6. A safety protection device for deep foundation pits in building construction according to claim 1, characterized in that, The enclosed rainproof mechanism includes an annular cover fixedly installed on the top of the protective box. The annular cover is bonded with multiple sets of triangular plates arranged circumferentially. Two adjacent sets of triangular plates are bonded together, and the triangular plates are positioned above the annular drill bit.

7. A safety protection device for deep foundation pits in building construction according to claim 1, characterized in that, The independent oxygen supply mechanism includes an oxygen storage tank fixedly connected to a protective box, an air pump fixedly connected to the oxygen storage tank, a first air exchange pipe fixedly connected to the air pump, an exhaust gas box fixedly connected to the protective box, a vacuum pump fixedly connected to the exhaust gas box, and a second air exchange pipe fixedly connected to the vacuum pump.

8. A safety protection device for deep foundation pits in building construction according to claim 1, characterized in that, A rotating frame is rotatably mounted on the top of the protective box, and the rotating frame is slidably connected to the first drill rod.

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