Remodeling device

By designing the lifting and extrusion structure of the remodeling device, the problem of uneven force under the rock sample during the strike process is solved, and the uniform force and density of the rock sample in the test is achieved, which improves the accuracy of the test results.

CN223192656UActive Publication Date: 2025-08-05SHENHUA BAORIXILE ENERGY CO LTD
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Patent Information

Application Number
CN202422364650.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-26
Publication Date
2025-08-05
Estimated Expiration
2034-09-26

AI Technical Summary

Technical Problem

In the prior art, the rock samples are affected by uneven stresses on the upper and lower layers during the strike process, which affects the test results.

Method used

A remodeling device is designed, including a lifting structure, a remodeling structure and an extrusion structure. The lifting structure is lifted and remodeled, so that the extrusion structure can evenly extrude the rock samples in the placement groove, and increase the extrusion area to ensure that the rock samples are subjected to uniform force during operation.

Benefits of technology

Through uniform extrusion, the problem of uneven force imposed by rock samples during the hitting process is solved, the accuracy of the test results and the compactness of the rock samples are improved, and disturbance is reduced.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a remodeling device. The remodeling device comprises a jacking structure, a remodeling structure and an extruding structure. Wherein the jacking structure is arranged in a lifting mode in the vertical direction; the remolding structure is mounted at the top of the jacking structure; the remolding structure is provided with a placing groove; the extrusion structure is fixedly arranged at the position corresponding to the opening in the top of the containing groove. The placing groove is used for placing a rock sample to be remolded; a jacking structure is arranged to lift the remolding structure; the extrusion structure and the placement groove are correspondingly arranged, so that the extrusion structure extrudes and remoulds the rock sample to be remolded in the placement groove, and the rock sample to be remolded is uniformly extruded through the extrusion surface of the extrusion structure and the bottom surface of the placement groove; by increasing the extrusion area, the rock sample to be remolded is uniformly stressed in the operation process, the compactness of the rock sample to be remolded is guaranteed, disturbance is reduced, and the problem that in the prior art, the test result is affected due to uneven stress of the upper layer and the lower layer in the beating process of the rock sample is solved.
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Description

Technical Field

[0001] The utility model relates to the technical field of geotechnical testing equipment, in particular to a reshaping device. Background Art

[0002] Weak interlayers refer to weak structural surfaces or zones within a rock mass that are weak in nature and have a certain thickness. Due to the inherent properties of weak rock, on-site rock sampling often encounters difficulties in sampling, excessive disturbance, and difficulty in sealing. Therefore, geotechnical testing requires reshaping rock samples from disturbed soils.

[0003] At present, the commonly used method for preparing reshaped rock samples is still the compaction method using a stone hammer to repeatedly hammer. This method requires a lot of human effort to reshape the rock sample, but it is difficult to control the compaction energy of the rock sample, which causes uneven force on the upper and lower layers, making the upper layer of the specimen denser than the lower layer or vice versa, thus affecting the experimental results. Utility Model Content

[0004] The main purpose of the utility model is to provide a reshaping device to solve the problem in the prior art that the test results are affected by uneven force on the upper and lower layers of the rock sample during the striking process.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a reshaping device, comprising: a lifting structure, which is arranged to be raised and lowered in the vertical direction; a reshaping structure, which is installed on the top of the lifting structure; the reshaping structure has a placement groove for placing the rock sample to be reshaped; and an extrusion structure, which is fixedly arranged at a position corresponding to the opening at the top of the placement groove, so that the lifting structure can lift the reshaping structure so that the extrusion structure can extrude and reshape the rock sample to be reshaped set in the placement groove.

[0006] Furthermore, the lifting structure includes: a mounting sleeve, having a mounting cavity and a limiting groove that are interconnected, and the mounting cavity and the limiting groove both extend in the vertical direction; a telescopic rod, movably arranged in the mounting cavity; the telescopic rod includes a limiting protrusion, and the limiting protrusion is movably arranged in the limiting groove along the extension direction of the limiting groove to limit the stroke of the telescopic rod extending out of the mounting sleeve.

[0007] Furthermore, the placement groove is a circular groove, and the extrusion structure is a disc; the inner diameter d1 of the circular groove is greater than the diameter d2 of the disc, so that the disc enters the circular groove through the opening of the circular groove to extrude the rock sample to be reshaped; and / or the bottom surface of the placement groove is parallel to the extrusion surface of the extrusion structure.

[0008] Furthermore, the lifting structure is a jack; and / or the reshaping structure is a ring cutter.

[0009] Furthermore, the reshaping device further includes: a driving structure, which is drivingly connected to the lifting structure to drive the lifting structure to move.

[0010] Furthermore, the reshaping device also includes: a mounting plate, mounted on the top of the lifting structure; the reshaping structure is mounted on the mounting plate; a plurality of limiting rods, mounted on the mounting plate; and a plurality of limiting rods are arranged at intervals along the circumference of the reshaping structure to limit the reshaping structure.

[0011] Furthermore, there are multiple reshaping structures, which are arranged in an array and at intervals on the mounting plate; there are multiple extrusion structures, which are arranged in one-to-one correspondence with the multiple reshaping structures to simultaneously extrude multiple rock samples to be reshaped; and multiple limit rods are respectively arranged along the circumference of each reshaping structure.

[0012] Furthermore, the reshaping device also includes: a mounting base for being set on a supporting base; an end of the lifting structure away from the reshaping structure is mounted on the mounting base; an mounting top frame is arranged above the mounting base, and the extrusion structure is suspended on the mounting top frame through a connecting rod so that the extrusion structure and the reshaping structure are arranged correspondingly.

[0013] Furthermore, a positioning block is provided on the side wall at the bottom end of the lifting structure, and the mounting base includes: a support seat for being set on the supporting base surface; a mounting groove, which is provided on the support seat; the mounting groove includes a positioning groove and a positioning protrusion, and the positioning protrusion is provided on the side of the positioning groove away from the bottom wall of the mounting groove, so that the side wall of the mounting groove forms a step shape; the positioning protrusion is provided with a mounting channel connected to the positioning groove, so that the positioning block enters the positioning groove through the mounting channel, so that the lifting structure can be positioned in the mounting groove by rotating the lifting structure.

[0014] Furthermore, the reshaping device also includes: a plurality of support rods, which are arranged along the circumference of the mounting base, and the two ends of the plurality of support rods are respectively connected to the mounting base and the mounting top frame to support the mounting top frame; each support rod is connected to the mounting top frame through a connecting piece; each support rod is welded to the mounting base; and / or there are a plurality of positioning blocks, and the plurality of positioning blocks are arranged at intervals along the circumference of the lifting structure; there are a plurality of mounting channels, and the plurality of mounting channels are arranged in a one-to-one correspondence with the plurality of positioning blocks.

[0015] Applying the technical solution of the present invention, the present invention provides a reshaping device, which includes a lifting structure, a reshaping structure, and an extrusion structure. The lifting structure is arranged to be raised and lowered in the vertical direction; the reshaping structure is installed on the top of the lifting structure; the reshaping structure has a placement slot; and the extrusion structure is fixedly arranged at a position corresponding to the opening at the top of the placement slot. The placement slot is provided for placing the rock sample to be reshaped; the lifting structure is provided to lift the reshaping structure; the extrusion structure is arranged correspondingly to the placement slot so that the extrusion structure extrude and reshape the rock sample to be reshaped arranged in the placement slot, thereby uniformly squeezing the rock sample to be reshaped through the extrusion surface of the extrusion structure and the bottom surface of the placement slot, so that the rock sample to be reshaped is subjected to uniform force during operation by increasing the extrusion area, thereby ensuring the density of the rock sample to be reshaped and reducing disturbances, thereby solving the problem in the prior art that the rock sample is affected by uneven force on the upper and lower layers during the striking process, which affects the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic axial view of the overall structure of an embodiment of a remodeling device according to the present invention is shown;

[0018] Figure 2 A schematic structural diagram showing the extrusion structure of the reshaping device according to the present invention is installed on the mounting top frame;

[0019] Figure 3 A schematic structural diagram of the lifting structure of the remodeling device according to the present invention is shown;

[0020] Figure 4 A schematic structural diagram of a first perspective of an embodiment of a reshaping device according to the present utility model is shown;

[0021] Figure 5 A second perspective structural diagram of an embodiment of the reshaping device according to the present utility model is shown;

[0022] Figure 6 A schematic structural diagram of a third perspective of an embodiment of a reshaping device according to the present utility model is shown;

[0023] Figure 7 A schematic structural diagram of a remodeling structure of a remodeling device according to the present invention is shown;

[0024] Figure 8 A schematic structural diagram of the mounting plate and the limiting rod of the reshaping device according to the present invention is shown.

[0025] The above drawings include the following reference numerals:

[0026] 1. Lifting structure; 11. Mounting sleeve; 12. Telescopic rod; 13. Positioning block; 2. Reshaping structure; 21. Placement slot; 3. Extrusion structure; 4. Mounting plate; 5. Limit rod; 6. Mounting base; 61. Support seat; 62. Mounting slot; 7. Mounting top frame; 71. Connecting rod; 8. Support rod; 9. Connecting piece. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] Please refer to Figures 1 to 8 The utility model provides a reshaping device, which includes a lifting structure 1, a reshaping structure 2 and an extrusion structure 3. The lifting structure 1 can be raised and lowered in the vertical direction; the reshaping structure 2 is installed on the top of the lifting structure 1; the reshaping structure 2 has a placement groove 21 for placing the rock sample to be reshaped; the extrusion structure 3 is fixedly arranged at a position corresponding to the opening at the top of the placement groove 21, so that the lifting structure 1 can lift the reshaping structure 2, and the lifting structure 1 can lift the reshaping structure 2 to drive the rock sample to be reshaped set in the placement groove 21 to move, so that the extrusion structure 3 extrude and reshape the rock sample to be reshaped set in the placement groove 21.

[0029] The utility model provides a reshaping device, comprising a lifting structure 1, a reshaping structure 2, and an extrusion structure 3. The lifting structure 1 is vertically movable; the reshaping structure 2 is mounted on top of the lifting structure 1; the reshaping structure 2 has a placement slot 21; and the extrusion structure 3 is fixedly disposed at a position corresponding to the opening at the top of the placement slot 21. A placement groove 21 is provided for placing the rock sample to be reshaped; a lifting structure 1 is provided to lift the reshaping structure 2; an extrusion structure 3 is provided corresponding to the placement groove 21 so that the extrusion structure 3 extrude and reshape the rock sample to be reshaped disposed in the placement groove 21, and the reshaping structure 2 is lifted by the lifting structure 1 to drive the rock sample to be reshaped disposed in the placement groove 21 to move, so that the extrusion structure 3 extrude and reshape the rock sample to be reshaped disposed in the placement groove 21, thereby uniformly squeezing the rock sample to be reshaped through the extrusion surface of the extrusion structure 3 and the bottom surface of the placement groove 21, and increasing the extrusion area so that the rock sample to be reshaped is subjected to uniform force during operation, thereby ensuring the density of the rock sample to be reshaped and reducing disturbance, thereby solving the problem in the prior art that the test results are affected by uneven force on the upper and lower layers of the rock sample during the striking process.

[0030] Specifically, in order to enable the lifting structure 1 to be raised and lowered in the vertical direction, the lifting structure 1 includes a mounting sleeve 11 and a telescopic rod 12. The mounting sleeve 11 has a mounting cavity and a limiting groove that are interconnected, and the mounting cavity and the limiting groove both extend in the vertical direction; the telescopic rod 12 is movably arranged in the mounting cavity; the telescopic rod 12 includes a limiting protrusion, which is movably arranged in the limiting groove along the extension direction of the limiting groove to limit the stroke of the telescopic rod 12 extending out of the mounting sleeve 11.

[0031] Furthermore, in order to extrude the rock sample to be reshaped set in the placement groove 21, the placement groove 21 is a circular groove, and the extrusion structure 3 is a disc; the inner diameter d1 of the circular groove is greater than the diameter d2 of the disc, so that the disc enters the circular groove through the opening of the circular groove to extrude the rock sample to be reshaped.

[0032] Generally, in order to improve the extrusion effect, the bottom surface of the placement groove 21 is parallel to the extrusion surface of the extrusion structure 3 .

[0033] Optionally, the lifting structure 1 is a jack; and the reshaping structure 2 is a ring cutter.

[0034] Preferably, the lifting structure 1 is a hydraulic jack.

[0035] Specifically, in order to drive the lifting structure 1 to move up and down in the vertical direction, the reshaping device further includes a driving structure, which is drivingly connected to the lifting structure 1 to drive the lifting structure 1 to move.

[0036] Optionally, the driving structure is a manual pump, so that the rock sample to be reshaped is squeezed by operating the manual pump.

[0037] Specifically, in order to facilitate the installation of the reshaping structure 2, the reshaping device also includes a mounting plate 4 and a plurality of limiting rods 5. The mounting plate 4 is installed on the top of the lifting structure 1; the reshaping structure 2 is installed on the mounting plate 4; the plurality of limiting rods 5 are installed on the mounting plate 4; the plurality of limiting rods 5 are arranged at intervals along the circumference of the reshaping structure 2 to limit the reshaping structure 2, thereby preventing the reshaping structure 2 from shifting during lifting or squeezing.

[0038] Furthermore, in order to improve the reshaping efficiency, there are multiple reshaping structures 2, and the multiple reshaping structures 2 are arranged in an array on the mounting plate 4 at intervals; there are multiple extrusion structures 3, and the multiple extrusion structures 3 are arranged in a one-to-one correspondence with the multiple reshaping structures 2 to simultaneously extrude multiple rock samples to be reshaped; and multiple limiting rods 5 are respectively arranged along the circumference of each reshaping structure 2.

[0039] Specifically, in order to facilitate the installation of the lifting structure 1 and the extrusion structure 3, the reshaping device also includes a mounting base 6 and a mounting top frame 7. The mounting base 6 is used to be set on the supporting base surface; the end of the lifting structure 1 away from the reshaping structure 2 is mounted on the mounting base 6; the mounting top frame 7 is set above the mounting base 6, and the extrusion structure 3 is suspended on the mounting top frame 7 through a connecting rod 71, so that the extrusion structure 3 and the reshaping structure 2 are set correspondingly.

[0040] Furthermore, in order to support the installation of the top frame 7, a positioning block 13 is provided on the side wall of the bottom end of the lifting structure 1, and the mounting base 6 includes a support seat 61 and a mounting groove 62, and the support seat 61 is used to be set on the supporting base surface; the mounting groove 62 is set on the support seat 61; the mounting groove 62 includes a positioning groove and a positioning protrusion, and the positioning protrusion is provided on the side of the positioning groove away from the bottom wall of the mounting groove 62, so that the side wall of the mounting groove 62 forms a step shape; the positioning protrusion is provided with a mounting channel connected to the positioning groove, so that the positioning block 13 enters the positioning groove through the mounting channel, so that the lifting structure 1 can be positioned in the mounting groove 62 by rotating the lifting structure 1.

[0041] Optionally, in order to improve stability during extrusion, the reshaping device also includes a plurality of support rods 8, which are arranged along the circumference of the mounting base 6, and the two ends of the plurality of support rods 8 are respectively connected to the mounting base 6 and the mounting top frame 7 to support the mounting top frame 7; each support rod 8 is connected to the mounting top frame 7 through a connecting piece 9; each support rod 8 is welded to the mounting base 6 to support each direction of the mounting top frame 7 to avoid damage during the extrusion process.

[0042] Optionally, in order to stably install the lifting structure 1 and make the connection between it and the mounting base 6 more stable, there are multiple positioning blocks 13, and the multiple positioning blocks 13 are arranged at intervals along the circumference of the lifting structure 1; there are multiple installation channels, and the multiple installation channels are arranged in a one-to-one correspondence with the multiple positioning blocks 13.

[0043] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0044] The utility model provides a reshaping device, comprising a lifting structure 1, a reshaping structure 2, and an extrusion structure 3. The lifting structure 1 is vertically movable; the reshaping structure 2 is mounted on top of the lifting structure 1; the reshaping structure 2 has a placement slot 21; and the extrusion structure 3 is fixedly disposed at a position corresponding to the opening at the top of the placement slot 21. A placement groove 21 is provided for placing the rock sample to be reshaped; a lifting structure 1 is provided to lift the reshaping structure 2; an extrusion structure 3 is provided corresponding to the placement groove 21 so that the extrusion structure 3 extrude and reshape the rock sample to be reshaped disposed in the placement groove 21, and the reshaping structure 2 is lifted by the lifting structure 1 to drive the rock sample to be reshaped disposed in the placement groove 21 to move, so that the extrusion structure 3 extrude and reshape the rock sample to be reshaped disposed in the placement groove 21, thereby uniformly squeezing the rock sample to be reshaped through the extrusion surface of the extrusion structure 3 and the bottom surface of the placement groove 21, and increasing the extrusion area so that the rock sample to be reshaped is subjected to uniform force during operation, thereby ensuring the density of the rock sample to be reshaped and reducing disturbance, thereby solving the problem in the prior art that the test results are affected by uneven force on the upper and lower layers of the rock sample during the striking process.

[0045] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0046] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0047] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0048] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0049] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A remodeling device, characterized in that: include: A lifting structure (1) is arranged to be liftable in a vertical direction; A reshaping structure (2) is installed on the top of the lifting structure (1); the reshaping structure (2) has a placement groove (21) for placing the rock sample to be reshaped; An extrusion structure (3) is fixedly arranged at a position corresponding to the opening at the top of the placement groove (21) to lift the reshaping structure (2) through the lifting structure (1), so that the extrusion structure (3) extrude and reshape the rock sample to be reshaped arranged in the placement groove (21).

2. The remodeling device according to claim 1, characterized in that The lifting structure (1) comprises: A mounting sleeve (11) having a mounting cavity and a limiting groove that are communicated with each other, wherein both the mounting cavity and the limiting groove extend in a vertical direction; A telescopic rod (12) is movably arranged in the installation cavity; the telescopic rod (12) includes a limiting protrusion, and the limiting protrusion is movably arranged in the limiting groove along the extension direction of the limiting groove to limit the travel of the telescopic rod (12) extending out of the installation sleeve (11).

3. The remodeling device according to claim 1, wherein: The placement groove (21) is a circular groove, and the extrusion structure (3) is a disc; the inner diameter d1 of the circular groove is greater than the diameter d2 of the disc, so that the disc enters the circular groove through the opening of the circular groove to extrude the rock sample to be reshaped; and / or The bottom surface of the placement groove (21) is parallel to the extrusion surface of the extrusion structure (3).

4. The remodeling device according to claim 1, characterized in that The lifting structure (1) is a jack; and / or The reshaping structure (2) is a ring knife.

5. The remodeling device according to claim 1, characterized in that The remodeling device further comprises: A driving structure is connected to the lifting structure (1) to drive the lifting structure (1) to move.

6. The remodeling device according to claim 1, characterized in that The remodeling device further comprises: A mounting plate (4) is mounted on the top of the lifting structure (1); the reshaping structure (2) is mounted on the mounting plate (4); A plurality of limiting rods (5) are mounted on the mounting plate (4); the plurality of limiting rods (5) are arranged at intervals along the circumference of the reshaping structure (2) to limit the position of the reshaping structure (2).

7. The remodeling device according to claim 6, characterized in that There are a plurality of remodeling structures (2), and the plurality of remodeling structures (2) are arranged in an array at intervals on the mounting plate (4); there are a plurality of extrusion structures (3), and the plurality of extrusion structures (3) are arranged in a one-to-one correspondence with the plurality of remodeling structures (2) so as to simultaneously extrude a plurality of rock samples to be remodeled; and the plurality of limiting rods (5) are respectively arranged along the circumference of each of the remodeling structures (2).

8. The remodeling device according to any one of claims 1 to 7, characterized in that The remodeling device further comprises: A mounting base (6) is used for being arranged on a supporting base surface; an end of the lifting structure (1) away from the reshaping structure (2) is mounted on the mounting base (6); A mounting top frame (7) is arranged above the mounting base (6), and the extrusion structure (3) is hoisted on the mounting top frame (7) via a connecting rod (71), so that the extrusion structure (3) and the reshaping structure (2) are arranged correspondingly.

9. The remodeling device according to claim 8, characterized in that A positioning block (13) is provided on the side wall at the bottom end of the lifting structure (1), and the mounting base (6) comprises: A support seat (61) is used for being arranged on the supporting base surface; The mounting groove (62) is arranged on the support seat (61); the mounting groove (62) includes a positioning groove and a positioning protrusion, and the positioning protrusion is arranged on a side of the positioning groove away from the bottom wall of the mounting groove (62) so that the side wall of the mounting groove (62) forms a step shape; the positioning protrusion is provided with a mounting channel connected to the positioning groove, so that the positioning block (13) enters the positioning groove through the mounting channel, so that the lifting structure (1) is positioned in the mounting groove (62) by rotating the lifting structure (1).

10. The remodeling device according to claim 9, characterized in that The remodeling device further comprises: A plurality of support rods (8) are arranged along the circumference of the mounting base (6), and the two ends of the plurality of support rods (8) are respectively connected to the mounting base (6) and the mounting top frame (7) to support the mounting top frame (7); each of the support rods (8) is connected to the mounting top frame (7) via a connecting piece (9); each of the support rods (8) is respectively welded to the mounting base (6); and / or There are a plurality of positioning blocks (13), and the plurality of positioning blocks (13) are arranged at intervals along the circumference of the lifting structure (1); there are a plurality of installation channels, and the plurality of installation channels are arranged in a one-to-one correspondence with the plurality of positioning blocks (13).