Hydraulic ring geological survey sampling device

Abstract

The utility model relates to the technical field of geological survey equipment, and discloses a hydraulic ring geological survey sampling device which comprises a mobile vehicle body provided with sampling holes; the sampling assembly is installed on the mobile vehicle body and comprises a sampling outer cylinder, a sampling inner cylinder and a sampling head, the sampling inner cylinder and the sampling head are detachably connected to the interior and the opening of the sampling outer cylinder respectively, and the top end and the bottom end of the sampling inner cylinder abut against an inner top plate of the sampling outer cylinder and the sampling head respectively; the driving assembly is mounted on the lifting plate, is in transmission connection with the sampling outer cylinder through a universal joint, and is used for driving the sampling outer cylinder to rotate; the limiting assembly is mounted on the lifting plate and selectively enables the axis of the sampling outer cylinder to coincide with the axis of the sampling hole; and the lifting assembly is arranged on the movable vehicle body and selectively drives the sampling outer cylinder to slide and penetrate through the sampling hole. According to the utility model, the sampling outer cylinder is inclined, and the sampling inner cylinder is detached, so that the process of taking out a sample is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of geological exploration equipment technology, and in particular to a hydrogeological and environmental geological exploration sampling device. Background Technology

[0002] In hydrogeological and environmental geological exploration, it is often necessary to sample and analyze soil and rock at different depths to understand geological structure and hydrogeological conditions. Currently, existing geological exploration sampling devices have some shortcomings, such as: complex sampling operations that are inconvenient to carry and use; difficulty in retrieving samples after sampling; and poor sample accuracy. Therefore, it is necessary to design a new type of hydrogeological and environmental geological exploration sampling device to solve these problems.

[0003] Patent CN220322778U discloses an engineering geological exploration sampling device, including a vehicle body. A sampling cylinder, capable of longitudinal movement and horizontal rotation, is located on top of the vehicle body. The vehicle body has a sampling hole that extends vertically and allows the sampling cylinder to pass through. Corrugated teeth are fixed to the bottom of the sampling cylinder. A lifting cylinder is sleeved around the top periphery of the sampling cylinder. A lifting mechanism for driving the lifting cylinder longitudinally is fixed to the upper surface of the vehicle body. A servo motor is fixed to the upper surface of the lifting cylinder, with its output end extending into the lifting cylinder and fixedly connected to a rotating shaft. A pin seat detachably connected to the rotating shaft is fixed to the upper surface of the sampling cylinder. A straightening tube, sleeved around the bottom periphery of the sampling cylinder, is fixed to the upper surface of the vehicle body, directly above the sampling hole. The straightening tube provides guidance during the descent of the sampling cylinder, allowing it to stably rotate into the soil. The straightening tube occupies little space and does not obstruct the disassembly or cleaning of the sampling cylinder.

[0004] However, such sampling devices have the following drawbacks: After sampling is completed, the sampling cylinder must be removed from the lifting cylinder to retrieve the sample. This frequent disassembly and reassembly process increases sampling time and reduces sampling efficiency. Furthermore, using the same sampling cylinder repeatedly during sampling can easily lead to sample contamination. Samples from different depths, such as soil and rocks, may contaminate each other, thus affecting the accuracy of the sample data. Summary of the Invention

[0005] The present invention aims to provide a sampling device for hydrogeological and environmental exploration to overcome the shortcomings mentioned above.

[0006] To achieve the above objectives, the technical solution of this utility model is: a hydrogeological exploration and sampling device, comprising:

[0007] A mobile vehicle body equipped with sampling holes;

[0008] The sampling assembly installed on the mobile vehicle body includes a sampling outer cylinder, a sampling inner cylinder and a sampling head that are detachably connected to the inside and opening of the sampling outer cylinder, respectively. The top and bottom ends of the sampling inner cylinder abut against the inner top plate of the sampling outer cylinder and the sampling head, respectively.

[0009] A lifting plate and a drive assembly mounted on the lifting plate, the drive assembly being connected to the sampling outer cylinder via a universal joint for driving the sampling outer cylinder to rotate.

[0010] A limiting assembly mounted on the lifting plate, the limiting assembly selectively aligning the axis of the sampling outer cylinder with the axis of the sampling hole; and

[0011] A lifting assembly installed on the mobile vehicle body selectively drives the sampling outer cylinder to slide through the sampling hole.

[0012] Furthermore, the limiting component includes:

[0013] Rotate the limiting ring connected to the outer wall of the top of the sampling outer cylinder;

[0014] A fixing ring fixedly connected to the lower surface of the lifting plate; and

[0015] A sliding ring is slidably connected to the fixed ring in the vertical direction. The axes of both the fixed ring and the sliding ring coincide with the axis of the sampling hole. The sliding ring selectively engages with the limiting ring.

[0016] Furthermore, one of the outer wall of the limiting ring or the inner wall of the sliding ring is provided with a plurality of limiting grooves, and the other of the outer wall of the limiting ring or the inner wall of the sliding ring is provided with a plurality of limiting protrusions. The inner wall of the sliding ring is selectively slidably connected to the outer wall of the limiting ring, and the limiting protrusions and the limiting grooves are detachably connected.

[0017] Furthermore, the outer wall of the limiting ring is provided with multiple limiting grooves, the inner wall of the sliding ring is provided with multiple limiting protrusions, the outer wall of the fixed ring is provided with multiple sliding grooves, and the limiting protrusions are slidably connected to the sliding grooves.

[0018] Multiple positioning blocks are provided on one of the outer sidewalls of the fixed ring or the inner sidewalls of the sliding ring, and multiple strip-shaped through grooves are provided on the other sidewall of the fixed ring or the inner sidewalls of the sliding ring. The positioning blocks are slidably connected to the strip-shaped through grooves.

[0019] Furthermore, the outer wall of the limiting ring is provided with multiple limiting protrusions, the inner wall of the sliding ring is provided with multiple limiting grooves, the outer wall of the fixed ring is provided with multiple sliding protrusions, and the limiting grooves are slidably connected to the sliding protrusions.

[0020] Multiple positioning blocks are provided on one of the outer sidewalls of the fixed ring or the inner sidewalls of the sliding ring, and multiple strip-shaped through grooves are provided on the other sidewall of the fixed ring or the inner sidewalls of the sliding ring. The positioning blocks are slidably connected to the strip-shaped through grooves.

[0021] Furthermore, both the limiting groove and the limiting protrusion are strip-shaped structures along the vertical direction.

[0022] Furthermore, the drive component is a first motor, which is connected to the top of the sampling outer cylinder via the universal joint, and the universal joint is a cross-shaped universal joint.

[0023] Furthermore, the sampling inner cylinder is divided into multiple sampling inner cylinder units along the radial direction of the sampling outer cylinder, and the multiple sampling inner cylinder units can be spliced ​​together to form a cylindrical structure with a top plate on the top and an opening at the bottom.

[0024] The upper surface of the sampling head is recessed downward to form an installation groove. The lower end of the sampling inner cylinder unit abuts against the installation groove. The top end of the sampling head is detachably connected to the bottom end of the sampling outer cylinder by a thread. The lower surface of the sampling head is provided with cutting teeth.

[0025] Furthermore, the outer wall of the sampling inner cylinder is provided with a positioning groove, and the inner wall of the sampling outer cylinder is provided with a positioning protrusion, the positioning protrusion being slidably connected to the positioning groove.

[0026] Furthermore, the lifting assembly includes:

[0027] A support frame is fixedly connected to the upper surface of the mobile vehicle body, and the lifting plate is slidably connected to the support frame in the vertical direction;

[0028] A threaded rod, vertically oriented and rotatably connected within the support frame, is threadedly connected to the lifting plate; and

[0029] A second motor is mounted on the support frame, and the second motor is connected to the threaded rod drive.

[0030] Compared with the prior art, this utility model has at least the following advantages:

[0031] This invention uses a limiting component to limit the sampling outer cylinder, ensuring that the axis of the outer cylinder coincides with the axis of the sampling hole, thus facilitating sampling. Releasing the limiting component allows the outer cylinder to be flipped. When the outer cylinder is tilted, the inner sampling cylinder can be retrieved from within it, facilitating sample removal. By replacing different sets of inner sampling cylinders, sampling can be performed at different locations, preventing cross-contamination between different samples and thus improving the accuracy of sample data. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the overall structure of the hydrogeological and environmental geological exploration sampling device of this utility model;

[0034] Figure 2 This utility model Figure 1 A magnified view of a portion of region A in the middle;

[0035] Figure 3 This is a cross-sectional view of the hydrogeological and environmental geological exploration sampling device of this utility model;

[0036] Figure 4 This utility model Figure 2 A magnified view of a portion of region B in the middle;

[0037] Figure 5 This utility model Figure 2 A magnified view of a portion of region C in the middle;

[0038] Figure 6 This is an assembly diagram of the sampling outer cylinder, sampling head, and universal joint of this utility model.

[0039] Figure 7 This is a schematic diagram of the sampling outer cylinder structure of this utility model;

[0040] Figure 8 This is a schematic diagram of the sampling inner cylinder structure of this utility model.

[0041] Reference numerals: 1. Moving vehicle body; 2. Sampling hole; 3. Sampling outer cylinder; 4. Positioning protrusion; 5. Sampling inner cylinder unit; 6. Positioning groove; 7. Sampling head; 8. Drive assembly; 9. Universal joint; 10. Limiting ring; 11. Limiting groove; 12. Sliding ring; 13. Limiting protrusion; 14. Strip groove; 15. Fixing ring; 16. Sliding groove; 17. Positioning block; 18. Mounting groove; 19. Cutting teeth; 20. Support frame; 21. Threaded rod; 22. Second motor; 23. Universal wheel; 24. Bearing; 25. Lifting plate. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] Reference Figure 1 and Figure 3 This utility model provides a hydrogeological exploration and sampling device, including a mobile vehicle body 1, a sampling component, a drive component 8, a limiting component, and a lifting component.

[0045] The mobile vehicle body 1 is equipped with sampling holes 2, through which the sampling assembly passes to perform geological sampling. The bottom of the mobile vehicle body 1 is equipped with casters 23 for easy movement. The sampling assembly, mounted on the mobile vehicle body 1, includes an outer sampling cylinder 3, an inner sampling cylinder, and a sampling head 7. The outer and inner sampling cylinders are cylindrical structures with openings at their lower ends, and the inner sampling cylinder is detachably connected to the inside of the outer sampling cylinder 3. The sampling head 7 is a through-type structure, detachably connected to the lower end of the outer sampling cylinder 3, with the top and bottom ends of the inner sampling cylinder abutting against the inner top plate of the outer sampling cylinder 3 and the sampling head 7, respectively. A drive assembly 8 is mounted on a lifting plate 25 and is connected to the outer sampling cylinder 3 via a universal joint 9, used to drive the outer sampling cylinder 3 to rotate. A limiting assembly is mounted on the lifting plate 25 to selectively align the axis of the outer sampling cylinder 3 with the axis of the sampling hole 2. The lifting assembly is installed on the mobile vehicle body 1 and selectively drives the sampling outer cylinder 3 to slide through the sampling hole 2. That is, the lifting assembly can drive the sampling outer cylinder 3 downward through the sampling hole 2 to realize geological sampling. After the sample is collected, the lifting assembly can drive the sampling outer cylinder 3 upward and detach it from the soil layer to complete the sampling work.

[0046] In use, an inner sampling cylinder is installed inside the outer sampling cylinder 3, and a sampling head 7 is installed at the lower end of the outer sampling cylinder 3. The mobile vehicle 1 is moved to the sampling location, so that the sampling hole 2 is above the sampling point. The axis of the outer sampling cylinder 3 is aligned with the axis of the sampling hole 2 by the limiting component, and the drive component 8 is activated to rotate the outer sampling cylinder 3. The lifting component drives the outer sampling cylinder 3 downward through the sampling hole 2, and the sampling head 7 continuously cuts through the soil layer, collecting samples continuously into the inner sampling cylinder. After the samples are collected, the lifting component drives the outer sampling cylinder 3 upward until it is above the sampling hole 2, and the drive component 8 is turned off. After the outer sampling cylinder 3 remains stationary, the limiting component is released from limiting the outer sampling cylinder 3. Rotate the bottom of the sampling outer cylinder 3 around the universal joint 9, tilting it to an inclined position. Remove the sampling head 7 from the lower end of the outer cylinder 3, and take out the sampling inner cylinder from within. The sample can then be retrieved through the inner cylinder, completing the geological exploration sampling process. When sampling is required again, clean the sampling head 7, install the next set of sampling inner cylinders inside the outer cylinder 3, and reinstall the sampling head 7. Repeat the above steps.

[0047] This invention uses a limiting component to limit the sampling outer cylinder 3, ensuring that the axis of the sampling outer cylinder 3 coincides with the axis of the sampling hole 2, thus facilitating sampling. Releasing the limiting component allows the sampling outer cylinder 3 to flip. When the sampling outer cylinder 3 is tilted, the sampling inner cylinder can be removed from within it, facilitating sample retrieval. By replacing different sets of sampling inner cylinders, sampling can be performed at different locations, avoiding cross-contamination between different samples and thus improving the accuracy of sample data.

[0048] Reference Figure 2 , Figure 4 and Figure 6 The limiting assembly includes a limiting ring 10, a fixed ring 15, and a sliding ring 12. The limiting ring 10 is rotatably connected to the outer wall of the top end of the sampling outer cylinder 3. Specifically, a bearing 24 is installed on the outer wall of the limiting ring 10, and the outer wall of the limiting ring 10 is fixedly connected to the inner ring of the bearing 24. The outer ring of the bearing 24 is fixedly connected to the inner wall of the limiting ring 10. The fixed ring 15 is fixedly connected to the lower surface of the lifting plate 25. The sliding ring 12 is slidably connected to the fixed ring 15 in the vertical direction. The axes of both the fixed ring 15 and the sliding ring 12 coincide with the axis of the sampling hole 2. The sliding ring 12 selectively engages with the limiting ring 10.

[0049] The sliding ring 12 slides downward so that its lower end is fitted around the periphery of the limiting ring 10, ensuring that the axis of the limiting ring 10 coincides with the axis of the sampling hole 2. The sliding ring 12 slides upward so that its lower end disengages from the periphery of the limiting ring 10, thus releasing the limiting ring 10 and allowing the sampling outer cylinder 3 to flip. At this time, the axis of the sampling cylinder intersects with the axis of the sampling hole 2, and the sampling outer cylinder 3 is in an inclined state.

[0050] Preferably, one of the outer wall of the limiting ring 10 or the inner wall of the sliding ring 12 is provided with a plurality of limiting grooves 11, and the other of the outer wall of the limiting ring 10 or the inner wall of the sliding ring 12 is provided with a plurality of limiting protrusions 13. The inner wall of the sliding ring 12 is selectively slidably connected to the outer wall of the limiting ring 10, and the limiting protrusions 13 are detachably connected to the limiting grooves 11.

[0051] Optionally, the outer wall of the limiting ring 10 is provided with a plurality of limiting grooves 11, the inner wall of the sliding ring 12 is provided with a plurality of limiting protrusions 13, and the outer wall of the fixing ring 15 is provided with a plurality of sliding grooves 16, wherein the limiting protrusions 13 and the sliding grooves 16 are slidably connected.

[0052] Alternatively, the following connection method can be selected: the outer wall of the limiting ring 10 is provided with multiple limiting protrusions 13, the inner wall of the sliding ring 12 is provided with multiple limiting grooves 11, the outer wall of the fixing ring 15 is provided with multiple sliding protrusions, and the limiting grooves 11 are slidably connected to the sliding protrusions.

[0053] Specifically, one of the outer wall of the fixed ring 15 or the inner wall of the sliding ring 12 is provided with multiple positioning blocks 17, and the other of the outer wall of the fixed ring 15 or the inner wall of the sliding ring 12 is provided with multiple strip-shaped through grooves 14, and the positioning blocks 17 are slidably connected to the strip-shaped through grooves 14.

[0054] Both the aforementioned limiting groove 11 and limiting protrusion 13 are strip-shaped structures along the vertical direction.

[0055] In one specific embodiment of this utility model, the drive component 8 is a first motor, which is connected to the top of the sampling outer cylinder 3 via a universal joint 9, which is a cross-shaped universal joint.

[0056] Reference Figures 7-8 The sampling inner cylinder is divided into multiple sampling inner cylinder units 5 radially along the sampling axis. These units 5 can be assembled into a cylindrical structure with a top plate and an open bottom. The outer wall of each sampling inner cylinder unit 5 has a positioning groove 6, and the inner wall of the outer sampling cylinder 3 has a positioning protrusion 4, which is slidably connected to the positioning groove 6. This design facilitates the assembly and disassembly of the multiple sampling inner cylinder units 5, allowing for convenient sampling after assembly and sample removal after disassembly.

[0057] ReferenceFigure 5 The upper surface of the sampling head 7 is recessed downward to form an installation groove 18. The lower end of the sampling inner cylinder 5 abuts against the installation groove 18. The sampling head 7 and the bottom end of the sampling outer cylinder 3 are detachably connected by threads, and the lower surface of the sampling head 7 is provided with cutting teeth 19.

[0058] Refer again Figure 1 The lifting assembly includes a support frame 20, a threaded rod 21, and a second motor 22. The support frame 20 is fixedly connected to the upper surface of the moving vehicle body 1, and the lifting plate 25 is slidably connected to the support frame 20 in the vertical direction. A dovetail-shaped protrusion is provided at one end of the lifting plate 25 near the support frame 20, and a dovetail-shaped sliding groove is provided inside the support frame 20 in the vertical direction, with the dovetail-shaped protrusion and the dovetail-shaped groove slidably connected. The threaded rod 21 is arranged in the vertical direction, rotatably connected inside the support frame 20, and threadedly connected to the lifting plate 25. The second motor 22 is mounted on the support frame 20 and is drively connected to the threaded rod 21.

[0059] It should be noted that the first motor and the second motor 22 are electrically connected to a control unit, which is a PLC device or similar. The control unit is electrically connected to an external power supply, which can be a battery or similar structure. The control unit can control the opening and closing of the first motor and the second motor 22, and can control the forward and reverse rotation of the second motor 22, thereby realizing the lifting process of the lifting plate.

[0060] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0061] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A sampling device for hydrogeological and environmental exploration, characterized in that, include: A mobile vehicle body (1) equipped with sampling holes (2); The sampling assembly installed on the mobile vehicle body (1) includes a sampling outer cylinder (3), a sampling inner cylinder and a sampling head (7) that are detachably connected to the inside and opening of the sampling outer cylinder (3), respectively. The top and bottom ends of the sampling inner cylinder abut against the inner top plate of the sampling outer cylinder (3) and the sampling head (7), respectively. The lifting plate (25) and the drive assembly (8) mounted on the lifting plate (25) are connected to the sampling outer cylinder (3) via a universal joint (9) to drive the sampling outer cylinder (3) to rotate. A limiting assembly installed on the lifting plate (25) selectively aligns the axis of the sampling outer cylinder (3) with the axis of the sampling hole (2); and A lifting assembly installed on the mobile vehicle body (1) selectively drives the sampling outer cylinder (3) to slide through the sampling hole (2).

2. The hydrogeological and environmental geological exploration and sampling device according to claim 1, characterized in that, The limiting component includes: A limiting ring (10) is rotatably connected to the outer wall of the top end of the sampling outer cylinder (3); A fixing ring (15) is fixedly connected to the lower surface of the lifting plate (25); and A sliding ring (12) is slidably connected to the fixed ring (15) in the vertical direction. The axes of the fixed ring (15) and the sliding ring (12) coincide with the axis of the sampling hole (2). The sliding ring (12) selectively engages with the limiting ring (10).

3. The hydrogeological and environmental geological exploration and sampling device according to claim 2, characterized in that, The outer wall of the limiting ring (10) or the inner wall of the sliding ring (12) is provided with a plurality of limiting grooves (11), and the other side of the outer wall of the limiting ring (10) or the inner wall of the sliding ring (12) is provided with a plurality of limiting protrusions (13). The inner wall of the sliding ring (12) is selectively slidably connected to the outer wall of the limiting ring (10), and the limiting protrusions (13) are detachably connected to the limiting grooves (11).

4. The hydrogeological and environmental geological exploration and sampling device according to claim 3, characterized in that, The outer side wall of the limiting ring (10) is provided with multiple limiting grooves (11), the inner side wall of the sliding ring (12) is provided with multiple limiting protrusions (13), the outer side wall of the fixed ring (15) is provided with multiple sliding grooves (16), and the limiting protrusions (13) and the sliding grooves (16) are slidably connected. Multiple positioning blocks (17) are provided on one of the outer sidewall of the fixed ring (15) or the inner sidewall of the sliding ring (12), and multiple strip-shaped through grooves (14) are provided on the other sidewall of the fixed ring (15) or the inner sidewall of the sliding ring (12). The positioning blocks (17) are slidably connected to the strip-shaped through grooves (14).

5. The hydrogeological and environmental geological exploration and sampling device according to claim 3, characterized in that, The outer side wall of the limiting ring (10) is provided with multiple limiting protrusions (13), the inner side wall of the sliding ring (12) is provided with multiple limiting grooves (11), the outer side wall of the fixed ring (15) is provided with multiple sliding protrusions, and the limiting grooves (11) are slidably connected to the sliding protrusions. Multiple positioning blocks (17) are provided on one of the outer sidewall of the fixed ring (15) or the inner sidewall of the sliding ring (12), and multiple strip-shaped through grooves (14) are provided on the other sidewall of the fixed ring (15) or the inner sidewall of the sliding ring (12). The positioning blocks (17) are slidably connected to the strip-shaped through grooves (14).

6. The hydrogeological and environmental geological exploration and sampling device according to claim 3, characterized in that, The limiting groove (11) and the limiting protrusion (13) are both strip-shaped structures along the vertical direction.

7. The hydrogeological and environmental geological exploration and sampling device according to claim 3, characterized in that, The drive assembly (8) is a first motor, which is connected to the top of the sampling outer cylinder (3) via the universal joint (9), which is a cross-shaped universal joint.

8. The hydrogeological and environmental geological exploration and sampling device according to claim 1, characterized in that, The sampling inner cylinder is divided into multiple sampling inner cylinder units (5) along the radial direction of the sampling outer cylinder (3), and the multiple sampling inner cylinder units (5) can be spliced ​​together to form a cylindrical structure with a top plate on the top and an opening at the bottom. The upper surface of the sampling head (7) is recessed downward to form an installation groove (18). The lower end of the sampling inner cylinder unit (5) abuts against the installation groove (18). The top end of the sampling head (7) is threadedly and detachably connected to the bottom end of the sampling outer cylinder (3). The lower surface of the sampling head (7) is provided with cutting teeth (19).

9. The hydrogeological and environmental geological exploration and sampling device according to claim 8, characterized in that, The outer wall of the sampling inner cylinder unit (5) is provided with a positioning groove (6), and the inner wall of the sampling outer cylinder (3) is provided with a positioning protrusion (4). The positioning protrusion (4) is slidably connected to the positioning groove (6).

10. The hydrogeological and environmental geological exploration and sampling device according to claim 1, characterized in that, The lifting assembly includes: A support frame (20) is fixedly connected to the upper surface of the mobile vehicle body (1), and the lifting plate (25) is slidably connected to the support frame (20) in the vertical direction; A threaded rod (21) is vertically arranged and rotatably connected within the support frame (20), the threaded rod (21) being threadedly connected to the lifting plate (25); and A second motor (22) is mounted on the support frame (20), and the second motor (22) is connected to the threaded rod (21) for transmission.

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