True triaxial TBM experiment platform auxiliary loading and unloading platform

Abstract

The application discloses a true tri-axial TBM experimental platform auxiliary loading and unloading platform, relates to the technical field of tunnel boring machine experimental equipment, and comprises a mounting platform, a tri-axial pressure applying unit, a drill bit boring unit and a feeding unit. The movable horizontal pressure applying assembly and the automatic feeding unit are arranged, the push assembly of the feeding unit is combined with a scissors type lifting mechanism and a linear assembly driven by a lead screw, and the bottom of the supporting frame is supported by the rollers, so that the automatic lifting, stable conveying and accurate positioning of the heavy rock sample are realized. The problems of low efficiency, inaccurate positioning and hidden safety hazards caused by the manual loading and unloading of the heavy sample in the traditional experimental platform are solved, the automation degree of experimental preparation and the operation safety are significantly improved, and the reliability of experimental data is ensured.

Description

Technical Field

[0001] This invention relates to the field of tunnel boring machine (TBM) technology, and in particular to an auxiliary loading and unloading platform for a true triaxial TBM experimental platform. Background Technology

[0002] In a true triaxial TBM experimental platform, large rock samples need to be subjected to triaxial pressure and tunneling tests. However, existing experimental platforms have significant problems in loading and unloading test samples: due to the large weight and size of the rock samples, hoisting equipment is usually used in conjunction with manual labor for handling and positioning, which is cumbersome, inefficient, and poses safety hazards.

[0003] Manual loading and unloading makes it difficult to precisely control the position of the sample within the pressure chamber, which can easily lead to uneven pressure application and affect the accuracy of experimental data. In addition, frequent manual intervention also prolongs experimental preparation time and reduces overall experimental efficiency. Summary of the Invention

[0004] In view of the above-mentioned problems in the prior art, the present invention is proposed.

[0005] The purpose of this invention is to provide an auxiliary loading and unloading platform for a true triaxial TBM experimental platform, which aims to solve the problems of difficult loading and unloading of heavy rock samples, low efficiency, and insufficient positioning accuracy.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a true triaxial TBM experimental platform auxiliary loading and unloading platform, including an installation platform.

[0007] The triaxial pressure unit includes a vertical pressure component and a longitudinal pressure component disposed on the mounting platform, a guide component disposed on the vertical pressure component and on both sides thereof, and a horizontal pressure component disposed on the moving end of the guide component.

[0008] The vertical pressure component, the longitudinal pressure component, and the horizontal pressure component act on the Z-axis direction, X-axis direction, and Y-axis direction of the sample to be tested, respectively.

[0009] The drill bit excavation unit includes a mounting box disposed at the moving end of the guide assembly, a first cylinder disposed between the mounting box and the horizontal pressure application assembly, and a drill bit assembly disposed on the side of the mounting box near the horizontal pressure application assembly;

[0010] The feeding unit includes a second cylinder disposed between the vertical pressure component and the horizontal pressure component, and a pushing component disposed on one side of the guide component;

[0011] The horizontal pressure application component is installed on the moving end of the guide component, and the fixed end and the extended end of the second cylinder are respectively connected to the vertical pressure application component and the horizontal pressure application component.

[0012] The pushing component includes a lifting component mounted on the installation platform, a linear component mounted on the lifting end of the lifting component, a support frame mounted on the moving end of the linear component, and rollers disposed below the bottom of the support frame.

[0013] As a preferred embodiment of the auxiliary loading and unloading platform of the true triaxial TBM experimental platform of the present invention, the lifting assembly includes a base installed on the mounting platform, a rotating plate hinged to each corner of the base, a top plate disposed on the top of the rotating plate, and a third cylinder disposed between the top plate and the base.

[0014] The top plate is hinged to all the rotating plates, and adjacent rotating plates are hinged to each other.

[0015] As a preferred embodiment of the auxiliary loading and unloading platform of the true triaxial TBM experimental platform of the present invention, the linear component includes a slide rail mounted on the top plate, a first slider slidably disposed on the slide rail, a motor mounted on the top plate, a threaded rod disposed at the output end of the motor, and a connecting block threadedly connected to the threaded rod.

[0016] The bottom of the support frame is fixedly connected to the first slider and the connecting block.

[0017] As a preferred embodiment of the auxiliary loading and unloading platform of the true triaxial TBM experimental platform of the present invention, the roller is mounted on the top plate near the guide assembly by a bracket, and the roller is always in contact with the bottom of the support frame.

[0018] As a preferred embodiment of the auxiliary loading and unloading platform of the true triaxial TBM experimental platform of the present invention, the vertical pressure component includes a base disposed on the mounting platform, support columns disposed at each inflection point of the base, a fixed seat disposed at the top of the support columns, and a fourth cylinder disposed on the lower surface of the fixed seat.

[0019] The base is connected to the fixed end of the second cylinder.

[0020] As a preferred embodiment of the auxiliary loading and unloading platform of the true triaxial TBM experimental platform of the present invention, the longitudinal pressure component includes a mounting frame disposed on the mounting platform, a fixing column disposed between two mounting frames, a support plate disposed on the inner side of one of the mounting frames, and a fifth cylinder disposed on the inner side of the other mounting frame.

[0021] As a preferred embodiment of the auxiliary loading and unloading platform of the true triaxial TBM experimental platform of the present invention, the guide component includes a first support frame disposed on the left side of the base, a second support frame disposed on the right side of the base, the first support frame and the second support frame disposed on the first support frame and the second support frame, a guide rail disposed on the top of the base, and a second slider disposed on the guide rail.

[0022] As a preferred embodiment of the auxiliary loading and unloading platform of the true triaxial TBM experimental platform of the present invention, the remaining part of the fixed end of the second cylinder rests on the first support frame, and the pushing component is located on the outer side of one end of the second support frame.

[0023] As a preferred embodiment of the auxiliary loading and unloading platform of the true triaxial TBM experimental platform of the present invention, the horizontal pressure component includes a limiting plate disposed on the second slider, a fixing plate disposed on the second slider, a connecting column disposed between each corner of the limiting plate and the fixing plate, a support base disposed on the two bottom connecting columns, and a sixth cylinder disposed inside the fixing plate.

[0024] As a preferred embodiment of the auxiliary loading and unloading platform of the true triaxial TBM experimental platform of the present invention, the telescopic end of the second cylinder is connected to the limiting plate, the limiting plate and the mounting box are connected by the first cylinder, and the limiting plate and the fixing plate are fixedly connected by the connecting column.

[0025] The beneficial effects of the auxiliary loading and unloading platform of the true triaxial TBM experimental platform of this invention are as follows:

[0026] 1. The automatic lifting and horizontal transport of heavy rock samples is achieved through the lifting and linear components and the pusher components, which completely replaces the inefficient and dangerous manual hoisting operations, significantly improves loading and unloading efficiency, and shortens the experimental cycle.

[0027] 2. The mechanized pushing method can accurately transport the sample to the predetermined position in the triaxial pressure unit, ensuring the centering of the sample under the action of each pressure component, thereby ensuring the uniformity of pressure and the reliability of experimental data.

[0028] 3. The pushing component combines scissor lifting with screw drive, resulting in strong load-bearing capacity and smooth operation. The rollers further ensure smooth movement of the support frame under heavy loads. The overall structure has good rigidity and is suitable for repeated, high-intensity use in laboratories.

[0029] 4. The feeding unit is linked with the triaxial pressure unit through the second cylinder, which enables the horizontal pressure component to move to the loading and unloading position and work seamlessly with the pushing component to realize the automated connection of sample loading and unloading and pressure test process. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of the present invention.

[0032] Figure 2 This is a schematic diagram of the vertical pressure application component in this invention.

[0033] Figure 3 This is a schematic diagram of the longitudinal pressure application component in this invention.

[0034] Figure 4 This is a schematic diagram of the structure of the guide component and the horizontal pressure component in this invention.

[0035] Figure 5 In this invention Figure 4 Enlarged view of the structure at point A in the middle.

[0036] Figure 6 This is a schematic diagram of the structure of the drill bit excavation unit in this invention.

[0037] Figure 7 This is a schematic diagram of the push component in this invention.

[0038] Figure 8 This is a schematic diagram of the structure of the linear component in this invention.

[0039] Figure 9 This is a cross-sectional view of the lifting component in this invention.

[0040] In the diagram: 100, mounting platform; 200, triaxial pressure unit; 210, vertical pressure assembly; 211, base; 212, support column; 213, fixed seat; 214, fourth cylinder; 220, longitudinal pressure assembly; 221, mounting frame; 222, fixed column; 223, support plate; 224, fifth cylinder; 230, guide assembly; 231, first support frame; 232, second support frame; 233, guide rail; 234, second slider; 240, horizontal pressure assembly; 241, limiting plate; 242, fixed plate; 243, connecting column; 24 4. Support base; 245. Sixth cylinder; 300. Drill bit excavation unit; 310. Mounting box; 320. First cylinder; 330. Drill bit assembly; 400. Feeding unit; 410. Second cylinder; 420. Pushing assembly; 421. Lifting assembly; 4211. Base; 4212. Rotating plate; 4213. Top plate; 4214. Third cylinder; 422. Linear assembly; 4221. Slide rail; 4222. First slider; 4223. Motor; 4224. Threaded rod; 4225. Connecting block; 423. Support frame; 424. Roller. Detailed Implementation

[0041] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0042] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0043] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0044] Reference Figures 1 to 9 This is the first embodiment of the present invention, which provides an auxiliary loading and unloading platform for a true triaxial TBM experimental platform, including an installation platform 100;

[0045] The triaxial pressure unit 200 includes a vertical pressure component 210 and a longitudinal pressure component 220 disposed on the mounting platform 100, a guide component 230 disposed on the vertical pressure component 210 and on both sides thereof, and a horizontal pressure component 240 disposed at the moving end of the guide component 230.

[0046] It should be noted that the vertical pressure component 210, the longitudinal pressure component 220, and the horizontal pressure component 240 act on the Z-axis direction, X-axis direction, and Y-axis direction of the sample being tested, respectively.

[0047] The drill bit excavation unit 300 includes a mounting box 310 disposed at the moving end of the guide assembly 230, a first cylinder 320 disposed between the mounting box 310 and the horizontal pressure assembly 240, and a drill bit assembly 330 disposed on the side of the mounting box 310 near the horizontal pressure assembly 240.

[0048] It should be noted that the test sample is first fixed by the triaxial pressure unit 200, then different pressures are applied in the three-axis direction, and the drill bit assembly 330 is driven to approach and drill into the test sample by the contraction of the first cylinder 320, simulating drilling under different pressure environments.

[0049] The feeding unit 400 includes a second cylinder 410 disposed between the vertical pressure component 210 and the horizontal pressure component 240, and a pushing component 420 disposed on one side of the guide component 230;

[0050] The horizontal pressure assembly 240 is installed on the moving end of the guide assembly 230, and the fixed end and the extension end of the second cylinder 410 are respectively connected to the vertical pressure assembly 210 and the horizontal pressure assembly 240.

[0051] The push component 420 includes a lifting component 421 mounted on the installation platform 100, a linear component 422 mounted on the lifting end of the lifting component 421, a support frame 423 mounted on the moving end of the linear component 422, and a roller 424 disposed below the bottom of the support frame 423.

[0052] It should be noted that the horizontal pressure component 240 can be moved on the guide component 230 to a loading / unloading position close to the push component 420 through the extension of the second cylinder 410, and the linear component 422 pushes the test sample into the inner cavity of the horizontal pressure component 240. After the horizontal pressure component 240 clamps the sample, the linear component 422 drives the support bracket 423 to be pulled out from the inner cavity of the horizontal pressure component 240.

[0053] In use, the lifting component 421 of the pushing component 420 is activated to lower the support frame 423 to a low position to facilitate the placement of heavy rock samples. Then, the lifting component 421 raises the sample to a height aligned with the center of the pressure chamber. Next, the second cylinder 410 extends, pushing the entire horizontal pressure component 240 along the guide component 230 to the loading and unloading position, aligning its support base 244 with the support frame 423. After that, the linear component 422 is activated, driving the support frame 423 to smoothly deliver the sample onto the support base 244 of the horizontal pressure component 240. Then, the horizontal pressure component 240 clamps the sample.

[0054] After the sample is delivered, the linear component 422 resets, the second cylinder 410 retracts, and pulls the horizontal pressure component 240 with the sample back to the pressure working area between the vertical pressure component 210 and the longitudinal pressure component 220.

[0055] Subsequently, the fourth cylinder 214 of the vertical pressure application assembly 210, the fifth cylinder 224 of the longitudinal pressure application assembly 220, and the sixth cylinder 245 of the horizontal pressure application assembly 240 operate sequentially to pressurize and fix the sample from three directions. After pressurization is completed, the first cylinder 320 of the drill bit excavation unit 300 pushes the mounting box 310 and the drill bit assembly 330 forward to conduct a tunneling simulation experiment on the sample under triaxial pressure.

[0056] like Figures 7 to 9 As shown, as an optional embodiment, the lifting assembly 421 includes a base 4211 mounted on the mounting platform 100, a rotating plate 4212 hinged to each corner of the base 4211, a top plate 4213 disposed on the top of the rotating plate 4212, and a third cylinder 4214 disposed between the top plate 4213 and the base 4211.

[0057] The top plate 4213 is hinged to all rotating plates 4212, and two adjacent rotating plates 4212 are hinged to each other.

[0058] The linear assembly 422 includes a slide rail 4221 mounted on the top plate 4213, a first slider 4222 slidably mounted on the slide rail 4221, a motor 4223 mounted on the top plate 4213, a threaded rod 4224 disposed at the output end of the motor 4223, and a connecting block 4225 threadedly connected to the threaded rod 4224.

[0059] The bottom of the support bracket 423 is fixedly connected to the first slider 4222 and the connecting block 4225;

[0060] The roller 424 is mounted on the top plate 4213 near the guide assembly 230 via a bracket, and the roller 424 is always in contact with the bottom of the support frame 423.

[0061] It should be noted that the lifting assembly 421 adopts a scissor-type lifting mechanism driven by the third cylinder 4214. This structure achieves a good balance between stroke and load-bearing capacity, making it particularly suitable for the smooth lifting of heavy objects. The linear assembly 422 converts the rotational motion into the linear motion of the support frame 423 by driving the threaded rod 4224 through the motor 4223. It has the advantages of accurate positioning and good self-locking. When the support frame 423 extends, especially when carrying heavy objects, the roller 424 can effectively share the bending moment, reduce the torque borne by the first slider 4222 and the connecting block 4225, ensure that the entire pushing process is smooth and stable, and prevent jamming.

[0062] In operation, the third cylinder 4214 extends, lifting the rotating plate 4212, causing the top plate 4213, its linear assembly 422, and the support frame 423 to rise to a predetermined height. Then, the motor 4223 rotates forward, pushing the connecting block 4225 and the support frame 423 along the slide rail 4221 towards the pressure unit via the threaded rod 4224. The roller 424 rotates accordingly, assisting in supporting the cantilevered end of the support frame 423. During the return stroke, the motor 4223 reverses, causing the support frame 423 to retract, and then the third cylinder 4214 retracts, lowering the entire mechanism.

[0063] like Figure 2 As shown, as an optional embodiment: the vertical pressure assembly 210 includes a base 211 disposed on the mounting platform 100, support columns 212 disposed at each inflection point of the base 211, a fixed seat 213 disposed at the top of the support column 212, and a fourth cylinder 214 disposed on the lower surface of the fixed seat 213.

[0064] The base 211 is connected to the fixed end of the second cylinder 410.

[0065] It should be noted that after the sample is transported to the working position, the piston rod of the fourth cylinder 214 extends downward to apply vertical pressure to the upper surface of the sample.

[0066] like Figure 3 As shown, as an optional embodiment, the longitudinal pressure assembly 220 includes a mounting bracket 221 disposed on the mounting platform 100, a fixing column 222 disposed between two mounting brackets 221, a support plate 223 disposed on the inner side of one of the mounting brackets 221, and a fifth cylinder 224 disposed on the inner side of the other mounting bracket 221.

[0067] It should be noted that the piston rod of the fifth cylinder 224 extends and pushes the sample to move along the X-axis until the sample is pressed tightly against the support plate 223, thereby completing the application of longitudinal pressure.

[0068] like Figure 4 As shown, as an optional embodiment, the guide assembly 230 includes a first support frame 231 disposed on the left side of the base 211, a second support frame 232 disposed on the right side of the base 211, a guide rail 233 disposed on the first support frame 231 and the second support frame 232, a guide rail 233 on the top of the base 211, and a second slider 234 disposed on the guide rail 233.

[0069] The remaining part of the fixed end of the second cylinder 410 rests on the first support frame 231, and the pushing component 420 is located on the outer side of one end of the second support frame 232.

[0070] It should be noted that when the second cylinder 410 extends or retracts, it drives the second slider 234 and all its components (horizontal pressure assembly 240 and mounting box 310) to move along the guide rail 233, thereby switching between the loading / unloading position and the working position.

[0071] like Figure 4 As shown, as an optional embodiment, the horizontal pressure application assembly 240 includes a limiting plate 241 disposed on the second slider 234, a fixing plate 242 disposed on the second slider 234, a connecting post 243 disposed between each corner of the limiting plate 241 and the fixing plate 242, a support base 244 disposed on the two bottom connecting posts 243, and a sixth cylinder 245 disposed inside the fixing plate 242.

[0072] The telescopic end of the second cylinder 410 is connected to the limiting plate 241. The limiting plate 241 and the mounting box 310 are connected by the first cylinder 320. The limiting plate 241 and the fixing plate 242 are fixedly connected by the connecting column 243.

[0073] It should be noted that, in the loading / unloading state, the entire horizontal pressure application assembly 240 is pushed to the loading / unloading position by the second cylinder 410, and the sample is fed into its support base 244 by the support bracket 423 and clamped. In the working state, the horizontal pressure application assembly 240 is pulled back to the working position, and the sixth cylinder 245 is activated to apply pressure to the sample from the Y-axis direction.

[0074] Importantly, the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A true triaxial TBM experimental platform auxiliary loading and unloading platform, characterized in that: Including the installation platform (100); The triaxial pressure unit (200) includes a vertical pressure component (210) and a longitudinal pressure component (220) disposed on the mounting platform (100), a guide component (230) disposed on the vertical pressure component (210) and on both sides thereof, and a horizontal pressure component (240) disposed at the moving end of the guide component (230). The vertical pressure component (210), the longitudinal pressure component (220), and the horizontal pressure component (240) act on the Z-axis, X-axis, and Y-axis directions of the sample to be tested, respectively. The drill bit excavation unit (300) includes a mounting box (310) disposed at the moving end of the guide assembly (230), a first cylinder (320) disposed between the mounting box (310) and the horizontal pressure assembly (240), and a drill bit assembly (330) disposed on the side of the mounting box (310) near the horizontal pressure assembly (240). The feeding unit (400) includes a second cylinder (410) disposed between the vertical pressure component (210) and the horizontal pressure component (240), and a pushing component (420) disposed on one side of the guide component (230). The horizontal pressure assembly (240) is mounted on the moving end of the guide assembly (230), and the fixed end and the extended end of the second cylinder (410) are respectively connected to the vertical pressure assembly (210) and the horizontal pressure assembly (240). The pushing component (420) includes a lifting component (421) installed on the installation platform (100), a linear component (422) installed on the lifting end of the lifting component (421), a support frame (423) installed on the moving end of the linear component (422), and a roller (424) disposed below the bottom of the support frame (423).

2. The auxiliary loading and unloading platform for the true triaxial TBM experimental platform as described in claim 1, characterized in that: The lifting assembly (421) includes a base (4211) mounted on the mounting platform (100), a rotating plate (4212) hinged to each corner of the base (4211), a top plate (4213) disposed on the top of the rotating plate (4212), and a third cylinder (4214) disposed between the top plate (4213) and the base (4211). The top plate (4213) is hinged to all the rotating plates (4212), and two adjacent rotating plates (4212) are hinged to each other.

3. The auxiliary loading and unloading platform for the true triaxial TBM experimental platform as described in claim 2, characterized in that: The linear component (422) includes a slide rail (4221) mounted on the top plate (4213), a first slider (4222) slidably disposed on the slide rail (4221), a motor (4223) mounted on the top plate (4213), a threaded rod (4224) disposed at the output end of the motor (4223), and a connecting block (4225) threadedly connected to the threaded rod (4224). The bottom of the support frame (423) is fixedly connected to the first slider (4222) and the connecting block (4225).

4. The auxiliary loading and unloading platform for the true triaxial TBM experimental platform as described in claim 2, characterized in that: The roller (424) is mounted on the top plate (4213) near the guide assembly (230) by a bracket, and the roller (424) is always in contact with the bottom of the support frame (423).

5. The auxiliary loading and unloading platform for the true triaxial TBM experimental platform as described in claim 1, characterized in that: The vertical pressure assembly (210) includes a base (211) disposed on the mounting platform (100), a support column (212) disposed at each inflection point of the base (211), a fixed seat (213) disposed at the top of the support column (212), and a fourth cylinder (214) disposed on the lower surface of the fixed seat (213). The base (211) is connected to the fixed end of the second cylinder (410).

6. The auxiliary loading and unloading platform for the true triaxial TBM experimental platform as described in claim 5, characterized in that: The longitudinal pressure assembly (220) includes a mounting bracket (221) disposed on the mounting platform (100), a fixing column (222) disposed between two of the mounting brackets (221), a support plate (223) disposed on the inner side of one of the mounting brackets (221), and a fifth cylinder (224) disposed on the inner side of the other mounting bracket (221).

7. The auxiliary loading and unloading platform for the true triaxial TBM experimental platform as described in claim 6, characterized in that: The guide assembly (230) includes a first support frame (231) disposed on the left side of the base (211), a second support frame (232) disposed on the right side of the base (211), the first support frame (231), the second support frame (232) disposed on the first support frame (231), the second support frame (232), a guide rail (233) on the top of the base (211), and a second slider (234) disposed on the guide rail (233).

8. The auxiliary loading and unloading platform for the true triaxial TBM experimental platform as described in claim 7, characterized in that: The remaining portion of the fixed end of the second cylinder (410) rests on the first support frame (231), and the pushing assembly (420) is located on the outside of one end of the second support frame (232).

9. The auxiliary loading and unloading platform for the true triaxial TBM experimental platform as described in claim 8, characterized in that: The horizontal pressure assembly (240) includes a limiting plate (241) disposed on the second slider (234), a fixing plate (242) disposed on the second slider (234), a connecting post (243) disposed between each corner of the limiting plate (241) and the fixing plate (242), a support base (244) disposed on the two bottom connecting posts (243), and a sixth cylinder (245) disposed inside the fixing plate (242).

10. The auxiliary loading and unloading platform for the true triaxial TBM experimental platform as described in claim 9, characterized in that: The telescopic end of the second cylinder (410) is connected to the limiting plate (241), the limiting plate (241) and the mounting box (310) are connected by the first cylinder (320), and the limiting plate (241) and the fixing plate (242) are fixedly connected by the connecting column (243).

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