Pile casing device for pile foundation construction in karst cave area

Abstract

The invention relates to the technical field of pile casings, and provides a pile casing device for karst cave area pile foundation construction, which comprises distance detection equipment and stroke monitoring equipment, and further comprises a mounting base, semicircular plate bodies are arranged on both sides of the mounting base, and the two semicircular plate bodies form a bearing cylinder body; sliding mounting assemblies are arranged on the outer arc surfaces of the semicircular plate bodies, the distance detection equipment is arranged on one sliding mounting assembly through an adjusting mounting assembly, the stroke monitoring equipment is arranged on the other sliding mounting assembly through a position adjusting structure, and the mounting base comprises a mounting base plate and a mounting groove frame; a circular through groove is formed in the middle of the mounting base plate. By means of the technical scheme, the problems that in the pile foundation construction process in the prior art, in the process that the pile casings enter a plurality of karst cave areas, the descending heights of the multiple pile casings are different easily, and constructors are not convenient to visually judge are solved.

Description

Technical Field

[0001] The invention relates to the technical field of casing, and in particular to a casing device for pile foundation construction in a karst cave area. Background Art

[0002] Pile foundation construction refers to the construction of the foundation of a building, usually by constructing a pile body of concrete material on the ground surface, which is used to construct the building on multiple pile bodies later. There are various pile foundation construction methods in the prior art, which are mainly divided into prefabricated pile body method and concrete pouring method. Among them, the concrete pouring method is to first use a drilling equipment to drill a hole into the stratum. After drilling a hole of corresponding depth, the casing is moved into the hole using a vibrator during the vibration process. The outer wall of the casing fits with the outer wall of the hole, and then the pile body material is moved into the casing, and then concrete is poured into the casing. After the concrete solidifies, it merges with the pile body material in the casing to form a pile body, thereby completing the pile foundation construction work.

[0003] However, when performing pile foundation construction, because the situation deep in the stratum is more complicated, some karst cave areas may appear deep underground, and sometimes there may be multiple karst cave areas arranged in sequence from top to bottom. If casing is used to pass through multiple karst cave areas in sequence from top to bottom, it is easy to cause instability in the pile body construction process. When encountering such a construction situation, after drilling out the height of each karst cave area deep underground, the construction method of the prior art is to first use a drilling device to drill downward to the top of the first karst cave area, then move the first casing into the borehole, continue to use a slightly smaller drilling device to pass through the casing, and make the drilling device continue to drill downward to the top of the next karst cave, and then continue to add a new casing to this borehole, so that the casing moves in the previous casing, and use the above method to make each casing pass through the corresponding karst cave area in sequence, so that when encountering multiple karst cave areas, the stability of subsequent pile foundation construction can also be guaranteed.

[0004] However, this construction method needs to ensure that each casing remains stopped after contacting the corresponding cave area during its downward movement, which requires strict control of the descent heights of the multiple casings. In the prior art, a hoisting vibrator is used to drive the casing to descend during the descent of the casings. As the multiple casings continue to descend, there may be differences in the top heights of the multiple casings, and at this time, the construction workers will have the problem of inaccurate judgment of the descent height of the casings. Summary of the invention

[0005] The present invention proposes a casing device for pile foundation construction in a karst cave area, which solves the problem in the prior art that during the pile foundation construction process, when multiple casings enter the karst cave area, there is a difference in the descent heights between the multiple casings, which makes it difficult for construction personnel to make intuitive judgments.

[0006] The technical solution of the present invention is as follows: A casing device for pile foundation construction in a karst cave area, including a distance detection device and a stroke monitoring device, further including:

[0007] An installation base, on both sides of the installation base are provided semi-circular plates, and the two semi-circular plates form a bearing cylinder body, and sliding installation components are arranged on the outer arc surfaces of the semi-circular plates;

[0008] Wherein, the distance detection device is arranged on one of the sliding installation components through an adjustment installation component;

[0009] The stroke monitoring device is arranged on the other sliding installation component through a position adjustment structure.

[0010] In order to install the two semi-circular plates, further, the installation base includes an installation substrate and installation slot frames, a circular through-hole is opened in the middle of the installation substrate, installation slot frames are fixedly connected to both sides of the top of the installation substrate, and arc-shaped through-holes are opened on both sides of the installation slot frames.

[0011] In order to install the two semi-circular plates between the two installation slot frames, further, arc-shaped protrusions are arranged on both sides of the semi-circular plates, and the arc-shaped protrusions are located in the arc-shaped through-holes.

[0012] In order to adjust the circumferential positions of the distance detection device and the stroke monitoring device, further, the sliding installation component includes an arc-shaped slide rail and a sliding platform, the arc-shaped slide rail is fixedly connected to the outer arc surface of the semi-circular plate, two sliding seats are fixedly connected to the bottom of the sliding platform, and the sliding seats are slidably connected to the arc-shaped slide rail.

[0013] In order to adjust the position of the distance detection device, further, the adjustment installation component includes a sliding frame, the sliding frame is fixedly connected to one of the sliding platforms, a support seat is slidably connected to the sliding frame, a transmission lead screw is rotatably connected in the sliding frame, the support seat is threadedly connected to the transmission lead screw, and the distance detection device is arranged on the support seat.

[0014] In order to adjust the position of the travel monitoring device, further, the position adjustment structure includes a moving frame, a lifting groove frame and a flipping groove frame. The moving frame is fixedly connected to another sliding platform. A sliding seat is also slidably connected to the moving frame. A transmission lead screw is also rotatably connected inside the moving frame. The sliding seat is threadedly connected to the transmission lead screw. The lifting groove frame is fixedly connected to the sliding seat. A receiving groove body is slidably connected inside the lifting groove frame. A lead screw transmission assembly is provided between the receiving groove body and the lifting groove frame. The flipping groove frame is rotatably connected to the bottom of the receiving groove body through a mounting rotating seat. A flipping control assembly is provided between the flipping groove frame and the receiving groove body. The travel monitoring device is arranged on the top of the flipping groove frame.

[0015] In order to make the travel monitoring device contact the casing, further, the flipping control assembly includes a T-shaped support plate, a sliding cylinder body, a rotating seat, a spring damper and a pushing screw. The T-shaped support plate is fixedly connected inside the receiving groove body. The side of the T-shaped support plate close to the flipping groove frame is provided with a slope-shaped protrusion. An entry groove is formed on the side of the sliding cylinder body close to the slope-shaped protrusion. The slope-shaped protrusion enters the sliding cylinder body through the entry groove. The rotating seat is longitudinally slidably connected to the flipping groove frame. The rotating seat is also slidably connected inside the sliding cylinder body. The rotating seat located inside the sliding cylinder body contacts the slope-shaped protrusion. The spring damper is provided between the two rotating seats. The pushing screw is threadedly connected to the receiving groove body. The pushing screw is rotatably connected to the sliding cylinder body.

[0016] In order to adjust the position of the receiving groove body, further, the lead screw transmission assembly includes a lifting lead screw and a driving shaft. The lifting lead screw is rotatably connected inside the lifting groove frame. The lifting lead screw is threadedly connected to the receiving groove body. The driving shaft is rotatably connected to the bottom of the lifting groove frame. Tapered gears are provided on both the lifting lead screw and the driving shaft. The two tapered gears are meshed.

[0017] The working principle and beneficial effects of the present invention are as follows:

[0018] In the present invention, during the use process, first install the installation base and the two semi-circular plate bodies on the upper side area of the drilling hole. First, determine the position of the distance detection device. An induction structure can be installed on the hoisting device used to drive the casing to descend, so that the distance detection device corresponds to the induction structure, facilitating the use of the distance detection device to judge the descending height of the hoisting device driving the casing. Since during the construction of the pile foundation in the karst cave area, multiple casings of different sizes need to be successively inserted into the drilling hole, when the multiple casings are successively inserted, it is necessary to judge the descending depth of each casing. After different casings descend, it is also difficult to keep the top heights of the multiple casings flush. For the above technical problems, when inserting the second casing in the present invention, when the bottom of the second casing is flush with the top of the previous casing, make the stroke monitoring device contact the second casing, so that the stroke monitoring device detects the descending stroke of the second casing, making the descending length of the second casing correspond to the actual depth of the karst cave area. Then use the position adjustment structure to continue to adjust the height of the stroke monitoring device, so that the stroke monitoring device continuously corresponds to the subsequent casings gradually moved in. By using the stroke monitoring device to detect the descending depth of each casing, the descending accuracy of each casing is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0020] Figure 1 It is a schematic structural diagram of the whole of the present invention;

[0021] Figure 2 For the present invention Figure 1 A partial enlarged structural schematic diagram at A in;

[0022] Figure 3 It is a schematic structural diagram of a partial cross-section of the cooperation of the distance detection device, the sliding platform, the sliding frame and the placing seat in the present invention;

[0023] Figure 4 It is a schematic structural diagram of the cooperation of the stroke monitoring device, the sliding platform, the lifting groove frame, the receiving groove body and the flipping groove frame in the present invention;

[0024] Figure 5 It is a schematic structural diagram of a partial cross-section of the cooperation of the stroke monitoring device, the lifting groove frame, the receiving groove body and the flipping groove frame in the present invention;

[0025] Figure 6 It is a schematic structural diagram of a partial cross-section of the cooperation of the T-shaped support plate, the sliding cylinder body, the rotating seat, the spring damper and the flipping groove frame in the present invention;

[0026] Figure 7 It is a schematic structural diagram of the cooperation of the protective cylinder body, the lens and the induction points in the present invention.

[0027] In the figure: 1, distance detection device; 2, stroke monitoring device; 3, semi-circular plate body; 4, installation base plate; 5, installation groove frame; 6, arc-shaped protrusion; 7, arc-shaped slide rail; 8, sliding platform; 9, sliding seat; 10, sliding frame; 11, support seat; 12, transmission lead screw; 13, moving frame; 14, lifting groove frame; 15, storage groove body; 16, flipping groove frame; 17, installation rotating seat; 18, T-shaped support plate; 19, slope-shaped protrusion; 20, sliding cylinder body; 21, rotating seat; 22, spring damper; 23, pushing screw; 24, lifting lead screw; 25, drive shaft; 26, protective cylinder body; 27, lens; 28, induction point; 29, holding seat; 30, bevel gear. Specific implementation manner

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts fall within the scope of protection of the present invention.

[0029] As Figures 1 to 7 shown, this embodiment proposes a casing device for pile foundation construction in a karst cave area, including a distance detection device 1 and a stroke monitoring device 2, and further including an installation base. Semi-circular plate bodies 3 are arranged on both sides of the installation base. The two semi-circular plate bodies 3 form a load-bearing cylinder. The installation base includes an installation base plate 4 and an installation groove frame 5. A circular through groove is opened in the middle of the installation base plate 4. Installation groove frames 5 are fixedly connected to both sides of the top of the installation base plate 4. Arc-shaped through grooves are opened on both sides of the installation groove frame 5. Arc-shaped protrusions 6 are arranged on both sides of the semi-circular plate body 3. The arc-shaped protrusions 6 are located in the arc-shaped through grooves. When pile foundation construction needs to be carried out in a certain area, after determining the drilling position accurately, the installation base plate 4 is installed in the drilling area so that the center point of the circular through groove corresponds to the center point of the subsequent drilling. The two semi-circular plate bodies 3 are installed on the top of the installation base plate 4. During the installation of the semi-circular plate body 3, the arc-shaped protrusions 6 on both sides of the semi-circular plate body 3 respectively enter the arc-shaped through grooves of the installation groove frame 5. The bending radian of the arc-shaped protrusion 6 matches the bending radian of the arc-shaped through groove, so that the semi-circular plate body 3 can be smoothly moved between the two arc-shaped through grooves through the arc-shaped protrusion 6.

[0030] Sliding mounting components are provided on the outer arc surfaces of the semi-circular plate bodies 3. The sliding mounting components include arc-shaped slide rails 7 and sliding platforms 8. The arc-shaped slide rails 7 are fixedly connected to the outer arc surfaces of the semi-circular plate bodies 3. Two sliding seats 9 are fixedly connected to the bottom of the sliding platform 8. The sliding seats 9 are slidably connected to the arc-shaped slide rails 7. When subsequently adjusting the positions of the distance detection device 1 and the stroke monitoring device 2 along the center point of the circular through groove in a circumferential manner, by using two sliding blocks, the sliding platform 8 can be moved between the two arc-shaped slide rails 7, realizing the flexibility of adjusting the positions of the distance detection device 1 and the stroke monitoring device 2, and facilitating matching with the actual situation of the construction site.

[0031] Among them, the distance detection device 1 is arranged on one of the sliding mounting components through an adjustment mounting component. The adjustment mounting component includes a sliding frame 10. The sliding frame 10 is fixedly connected to one of the sliding platforms 8. A support seat 11 is slidably connected to the sliding frame 10. A transmission lead screw 12 is rotatably connected inside the sliding frame 10. The support seat 11 is threadedly connected to the transmission lead screw 12. The distance detection device 1 is arranged on the support seat 11. When it is necessary to determine the descending distance of the casing, because during the pile foundation construction operation in the karst cave area, multiple casings need to enter the drilling holes in sequence, and it is also necessary to work in sequence between multiple casings and multiple drilling devices, so sometimes the entry height of the subsequent casing may not be directly exposed from the drilling hole. Therefore, it is difficult to directly detect the subsequent entry of the casing only by using the stroke monitoring device 2. In this invention, the distance detection device 1 is used in cooperation. The distance detection device 1 is an infrared ranging device well-known to those skilled in the art. In the prior art, during the process of driving the casing to descend, a hoisting vibrator is used to drive the casing to descend. In this invention, an induction structure can be installed at the corresponding position on the hoisting vibrator, so that the distance detection device 1 cooperates with the induction structure. Then, the distance detection device 1 cooperates with the induction structure. The induction structure includes a protective cylinder body 26. An opening is provided on one side of the protective cylinder body 26. A lens 27 is arranged at the opening. An induction point 28 is arranged inside the protective cylinder body 26. A placing seat 29 is fixedly connected to the sliding seat 9. The placing seat 29 is used for placing the protective cylinder body 26. The protective cylinder body 26 can be installed on the hoisting vibrator by welding or bolt fastening, and the position of the distance detection device 1 is adjusted so that the distance detection device 1 cooperates with the induction point 28, facilitating accurately judging the timing when the hoisting vibrator drives the casing to enter the drilling hole.

[0032] The travel monitoring device 2 is arranged on another sliding mounting component through a position adjustment structure. The position adjustment structure includes a moving frame 13, a lifting groove frame 14 and a flipping groove frame 16. The moving frame 13 is fixedly connected to another sliding platform 8. A sliding seat 9 is also slidably connected to the moving frame 13. A transmission lead screw 12 is also rotatably connected inside the moving frame 13. The sliding seat 9 is threadedly connected to the transmission lead screw 12. The lifting groove frame 14 is fixedly connected to the sliding seat 9. A storage groove body 15 is slidably connected inside the lifting groove frame 14. A lead screw transmission assembly is arranged between the storage groove body 15 and the lifting groove frame 14. The lead screw transmission assembly includes a lifting lead screw 24 and a drive shaft 25. The lifting lead screw 24 is rotatably connected inside the lifting groove frame 14. The lifting lead screw 24 is threadedly connected to the storage groove body 15. The drive shaft 25 is rotatably connected to the bottom of the lifting groove frame 14. Tapered gears 30 are arranged on both the lifting lead screw 24 and the drive shaft 25. The two tapered gears 30 are meshed. The travel monitoring device 2 is a common rotary travel monitoring device 2 in the prior art and is a known prior art device in the field of technology. The travel monitoring device 2 is brought into close contact with the casing, so as to monitor the descending height of the casing, facilitating timely stopping of the descending operation of the casing. As multiple casings are continuously inserted, it is necessary to adjust the working height of the travel monitoring device 2. Rotate the drive shaft 25. Under the meshing action of the two tapered gears 30, the lifting lead screw 24 is driven to rotate, so that the storage groove body 15 moves longitudinally inside the lifting groove frame 14 to adjust the horizontal height of the travel monitoring device 2. And rotate the transmission lead screw 12 inside the moving frame 13, so that the sliding seat 9 drives the lifting groove frame 14 to move horizontally, facilitating adjustment of the position of the travel monitoring device 2 to contact the casing.

[0033] The flipping trough frame 16 is rotationally connected to the bottom of the storage trough body 15 through the installation turntable 17. A flipping control assembly is arranged between the flipping trough frame 16 and the storage trough body 15. The stroke monitoring device 2 is arranged on the top of the flipping trough frame 16. The flipping control assembly includes a T-shaped support plate 18, a sliding cylinder body 20, a rotating seat 21, a spring damper 22 and a pushing screw 23. The T-shaped support plate 18 is fixedly connected inside the storage trough body 15. One side of the T-shaped support plate 18 close to the flipping trough frame 16 is provided with a slope-shaped protrusion 19. An access groove is opened on one side of the sliding cylinder body 20 close to the slope-shaped protrusion 19. The slope-shaped protrusion 19 enters the sliding cylinder body 20 through the access groove. A rotating seat 21 is longitudinally slidably connected to the flipping trough frame 16, and a rotating seat 21 is also slidably connected inside the sliding cylinder body 20. The rotating seat 21 located inside the sliding cylinder body 20 contacts the slope-shaped protrusion 19. A spring damper 22 is arranged between the two rotating seats 21. The pushing screw 23 is threadedly connected to the storage trough body 15, and the pushing screw 23 is rotationally connected to the sliding cylinder body 20. When it is necessary to make the stroke monitoring device 2 contact the casing during the descending process, rotate the pushing screw 23 to make the pushing screw 23 longitudinally move on the storage trough body 15, push the sliding cylinder body 20 to move. During the movement of the sliding cylinder body 20, the slope-shaped protrusion 19 will enter the sliding cylinder body 20 through the access groove, push the rotating seat 21 inside the sliding cylinder body 20 to move horizontally, so that the rotating seat 21, the spring damper 22 and the other rotating seat 21 move longitudinally together, push the flipping trough frame 16 to flip along the center point of the installation turntable 17, so that the stroke monitoring device 2 contacts the casing, ensuring the monitoring of the descending distance of the casing.

[0034] The working principle of the casing device for pile foundation construction in the karst cave area:

[0035] First, install the installation base plate 4 at the drilling area so that the center point of the circular through groove corresponds to the center point of the subsequent drilling. Install the two semi-circular plate bodies 3 on the top of the installation base plate 4. During the installation of the semi-circular plate bodies 3, make the arc-shaped protrusions 6 on both sides of the semi-circular plate bodies 3 enter the arc-shaped through grooves of the installation trough frame 5 respectively. The bending radian of the arc-shaped protrusions 6 matches the bending radian of the arc-shaped through grooves, so that the semi-circular plate bodies 3 can smoothly move between the two arc-shaped through grooves through the arc-shaped protrusions 6. Then install the protective cylinder body 26 on the hoisting vibrator and adjust the position of the distance detection device 1 to correspond to the position of the induction point 28 inside the protective cylinder body 26. Then start to make multiple drilling devices and casings enter the drilling holes in sequence. During the construction process, use the distance detection device 1 to judge the descending distance of the hoisting vibrator driving the casing.

[0036] In order to detect the descending distance of the casing, the driving shaft 25 is rotated. Under the meshing action of the two bevel gears 30, the lifting lead screw 24 is driven to rotate, so that the receiving trough body 15 moves longitudinally in the lifting trough frame 14 to adjust the horizontal height of the stroke monitoring device 2. Then, the transmission lead screw 12 in the moving frame 13 is rotated, so that the sliding seat 9 drives the lifting trough frame 14 to move horizontally, facilitating the adjustment of the position of the stroke monitoring device 2 to contact the casing. Next, the pushing screw 23 is rotated, so that the pushing screw 23 moves longitudinally on the receiving trough body 15 to push the sliding cylinder body 20 to move. During the movement of the sliding cylinder body 20, the slope-shaped protrusion 19 will enter the sliding cylinder body 20 through the entry groove, pushing the rotating seat 21 in the sliding cylinder body 20 to move horizontally, so that the rotating seat 21, the spring damper 22 and another rotating seat 21 move longitudinally together, pushing the flipping trough frame 16 to flip along the center point of the mounting rotating seat 17, so that the stroke monitoring device 2 contacts the casing, ensuring the monitoring of the descending distance of the casing. When the height of the previously inserted casing is aligned, the monitoring of the descending distance of the subsequent casing is started to determine the time to stop the descending of the casing.

[0037] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A casing device for pile foundation construction in a karst cave area, comprising a distance detection device (1) and a stroke monitoring device (2), characterized in that, Further included are: An installation base, on both sides of which are provided semi-circular plates (3), and the two semi-circular plates (3) form a bearing cylinder body. Sliding installation components are arranged on the outer arc surfaces of the semi-circular plates (3); Among them, the distance detection device (1) is arranged on one of the sliding installation components through an adjustment installation component; The stroke monitoring device (2) is arranged on the other sliding installation component through a position adjustment structure.

2. The casing device for pile foundation construction in a karst cave area according to claim 1, wherein, The installation base includes: An installation substrate (4), in the middle of which is provided a circular through groove; Installation groove frames (5), which are fixedly connected to both sides of the top of the installation substrate (4). Arc-shaped through grooves are provided on both sides of the installation groove frames (5).

3. The casing device for pile foundation construction in a karst cave area according to claim 2, characterized in that, Arc-shaped protrusions (6) are arranged on both sides of the semi-circular plate (3), and the arc-shaped protrusions (6) are located in the arc-shaped through grooves.

4. The casing device for pile foundation construction in a karst cave area according to claim 3, characterized in that, The sliding installation component includes: An arc-shaped slide rail (7), which is fixedly connected to the outer arc surface of the semi-circular plate (3); A sliding platform (8), at the bottom of which are fixedly connected two sliding seats (9), and the sliding seats (9) are slidably connected to the arc-shaped slide rail (7).

5. The casing device for pile foundation construction in a karst cave area according to claim 4, characterized in that, The adjustment installation component includes: A sliding frame (10), which is fixedly connected to one of the sliding platforms (8). A support seat (11) is slidably connected to the sliding frame (10). A transmission lead screw (12) is rotatably connected in the sliding frame (10). The support seat (11) is threadedly connected to the transmission lead screw (12), and the distance detection device (1) is arranged on the support seat (11).

6. The casing device for pile foundation construction in a karst cave area according to claim 5, wherein, The position adjustment structure includes: A moving frame (13), which is fixedly connected to the other sliding platform (8). A sliding seat (9) is also slidably connected to the moving frame (13). A transmission lead screw (12) is also rotatably connected in the moving frame (13). The sliding seat (9) is threadedly connected to the transmission lead screw (12); A lifting groove frame (14), which is fixedly connected to the sliding seat (9). A receiving groove body (15) is slidably connected in the lifting groove frame (14). A lead screw transmission component is arranged between the receiving groove body (15) and the lifting groove frame (14); A flipping groove frame (16), which is rotatably connected to the bottom of the receiving groove body (15) through an installation rotating seat (17). A flipping control component is arranged between the flipping groove frame (16) and the receiving groove body (15). The stroke monitoring device (2) is arranged on the top of the flipping groove frame (16).

7. The casing device for pile foundation construction in a karst cave area according to claim 6, characterized in that, The flipping control component includes: A T-shaped support plate (18), which is fixedly connected in the receiving groove body (15). The side of the T-shaped support plate (18) close to the flipping groove frame (16) is provided with a slope-shaped protrusion (19); A sliding cylinder body (20), an entry groove is formed on one side of the sliding cylinder body (20) close to the slope-shaped protrusion (19), and the slope-shaped protrusion (19) enters the sliding cylinder body (20) through the entry groove; A rotating seat (21), the rotating seat (21) is longitudinally slidably connected to the flipping groove frame (16), and the rotating seat (21) is also slidably connected to the inside of the sliding cylinder body (20), and the rotating seat (21) located inside the sliding cylinder body (20) contacts the slope-shaped protrusion (19); A spring damper (22), the spring damper (22) is arranged between the two rotating seats (21); A pushing screw rod (23), the pushing screw rod (23) is threadedly connected to the storage groove body (15), and the pushing screw rod (23) is rotatably connected to the sliding cylinder body (20).

8. A casing device for pile foundation construction in a karst cave area according to claim 7, characterized in that, The lead screw drive assembly includes: A lifting lead screw (24), the lifting lead screw (24) is rotatably connected to the inside of the lifting groove frame (14), and the lifting lead screw (24) is threadedly connected to the storage groove body (15); A drive shaft (25), the drive shaft (25) is rotatably connected to the bottom of the lifting groove frame (14), and conical gears (30) are arranged on both the lifting lead screw (24) and the drive shaft (25), and the two conical gears (30) are meshed.

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