Geotechnical centrifuge

Abstract

The utility model relates to a geotechnical centrifuge which comprises a container, an actuating mechanism, a power mechanism, a mounting mechanism and a transmission mechanism, the power mechanism is mounted on the container through the mounting mechanism, so that when the container rotates under the action of centrifugal equipment, the power mechanism can rotate along with the container, and when a target object on a geotechnical model in the container needs to be moved, power is directly provided for the execution mechanism in the container through the power mechanism which synchronously moves; according to the technical scheme, the target object in the container is moved under the condition that the geotechnical centrifuge is not stopped, that is, the container keeps rotational motion, the target object can be adjusted after a gravity unit is applied to the geotechnical model, and authenticity and reliability of analogue simulation are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of geotechnical centrifuge technology, in particular to a geotechnical centrifuge. Background Art

[0002] In recent years, China's infrastructure projects are often characterized by large volume and rapid technology replacement, mainly reflected in major projects such as earth-rock dams, marine port projects, soft soil foundation reinforcement, and roads. For the support means of such major projects, bolt reinforcement can be adopted. For example, by applying prestress to the bolts, the surrounding rock and soil masses are in a compressed state, thereby improving the mechanical properties of the anchoring system, inhibiting the sliding and deformation of the rock and soil masses, reducing the risk of tensile and shear failures of the rock and soil masses, and thus improving the bearing capacity of the rock and soil masses and the stability of the above-mentioned major projects.

[0003] To analyze and study the stress and deformation of rock and soil masses, a geotechnical centrifuge is often needed for assistance. For example, bolts are arranged in the rock and soil mass model of the geotechnical centrifuge to simulate the geotechnical structure.

[0004] In related technologies, in order to apply a force to the geotechnical model, for example, to apply prestress to the bolts in the rock and soil mass, methods such as hanging heavy objects can be used. However, this requires operation when the geotechnical centrifuge is stopped, which affects the experimental efficiency.

[0005] Therefore, it is necessary to develop a new type of geotechnical centrifuge to improve some of the above problems existing in the related technologies. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a geotechnical centrifuge that can adjust the force applied to an object in a geotechnical model without stopping the geotechnical centrifuge.

[0007] The purpose of the utility model can be achieved by the following technical solutions:

[0008] The geotechnical centrifuge provided by the utility model includes: a container, an actuator, a power mechanism, a mounting mechanism, and a transmission mechanism; the actuator is used to move the target object in the container; the power mechanism is used to provide power; the mounting mechanism is connected to the power mechanism and is used to mount the power mechanism on the container; the transmission mechanism is connected to the power mechanism and the actuator.

[0009] Optionally, the mounting mechanism includes a penetrating member that penetrates the wall of the container, and the penetrating member is of a hollow structure to communicate the inside and outside of the container.

[0010] Optionally, the through member includes a first body portion and a second body portion located inside and outside the container respectively. The first body portion and the second body portion are respectively provided with threads with opposite helix directions for the screw member to abut against the wall of the container from both inside and outside after rotation, so that the through member is fixed to the container.

[0011] Optionally, the installation mechanism further includes an installation cavity, the installation cavity is connected to the outer wall surface of the container, and the power mechanism is arranged in the installation cavity.

[0012] Optionally, the transmission mechanism further includes a transmission connecting member and a transmission member. The transmission connecting member is rotatably arranged in the through member, and both ends of the transmission member are swingably connected to the transmission connecting member and the actuator respectively.

[0013] Optionally, the geotechnical centrifuge further includes a conversion mechanism, the conversion mechanism includes a conversion member and a conversion fixing member. The conversion fixing member is threadedly connected to the conversion member, and the actuator is connected to the conversion member for driving the conversion member to rotate and then move the target object.

[0014] Optionally, the conversion fixing member is arranged in the container through a pressure-bearing spring, and the axis of the pressure-bearing spring is parallel to the moving direction of the conversion member.

[0015] Optionally, the power mechanism includes a driving member and a torque limiter, and the driving member is connected to the transmission mechanism through the torque limiter.

[0016] Optionally, the power mechanism further includes a servo motor, and the servo motor is connected to the driving member through a belt drive.

[0017] Optionally, the actuator includes a magnetic member, and the magnetic member is provided with a groove matching the shape of the target object for driving the target object after the target object enters the groove under the action of magnetic force.

[0018] Compared with the prior art, the geotechnical centrifuge provided by the present utility model has the following beneficial effects:

[0019] 1. The present utility model installs the power mechanism on the container through the installation mechanism, so that when the container rotates under the action of the centrifugal equipment, the power mechanism can rotate with the container. When it is necessary to move the target object on the geotechnical model in the container, the power mechanism that moves synchronously directly provides power for the actuator in the container, realizing the movement of the target object in the container without stopping the geotechnical centrifuge, that is, when the container maintains a rotational motion. This method can apply a gravity unit to the geotechnical model first and then adjust the target object, which is beneficial to the authenticity and reliability of the simulation.

[0020] 2. By setting a torque limiter on the driving member, the utility model can preset the maximum acting force for the actuator, avoiding overloading or the torque exceeding the required set value.

[0021] 3. The conversion and fixing member arranged at the output end of the actuator is installed in the container through a pressure-bearing spring, which can provide elastic support for the rotating fixing member when the distance between the actuator and the target object changes, facilitating the absorption of impact and vibration and preventing the actuator from directly colliding with the target object.

[0022] 4. By arranging a conversion mechanism at the output end of the actuator, the utility model converts the type of motion output by the actuator. For example, converting the rotational motion output by the actuator into a linear motion is beneficial to meeting the diverse requirements for the movement mode of the target object in the container during the experimental simulation process and improving the experimental compatibility of the geotechnical centrifuge. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the geotechnical centrifuge in the embodiment of the utility model;

[0024] Figure 2 is Figure 1 a schematic connection structural diagram of the actuator, the conversion mechanism and the anchor rod shown in;

[0025] Figure 3 is Figure 1 a schematic connection structural diagram of the power structure, the installation mechanism and the transmission mechanism shown in;

[0026] Figure 4 is Figure 3 a schematic connection structural diagram of the penetrating member and the container shown in;

[0027] Figure 5 is Figure 1 a schematic structural diagram of the control mechanism shown in;

[0028] Figure 6 is Figure 5 an enlarged view of part A shown in;

[0029] Figure 7 is Figure 1 a schematic structural diagram of the geotechnical centrifuge in the case of multiple anchor rods shown in.

[0030] Reference Signs:

[0031] 1. Actuator; 101. Magnetic part; 2. Power mechanism; 201. Driving part; 202. Servo motor; 3. Transmission mechanism; 301. First transmission part; 302. Second transmission part; 303. Transmission control part; 304. Transmission connecting part; 4. Control mechanism; 401. Control moving part; 4011. Steering gear; 4012. Filamentous part; 40121. First filament segment; 40122. Second filament segment; 4013. Ring-shaped part; 40131. First ring body; 40132. Second ring body; 402. Control fixing part; 4021. Bearing part; 5. Conversion mechanism; 501. Conversion part; 502. Conversion fixing part; 503. Pressure-bearing spring; 6. Installation mechanism; 601. Through part; 6011. First section body; 6012. Second section body; 602. Spiral installation part; 603. Sealing ring; 604. Installation cavity; 7. Container; 701. First sandy soil body; 702. Front wall; 703. Anchor rod; 8. Universal joint; 9. Bearing. Detailed implementation mode

[0032] The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present utility model, and the detailed implementation mode and specific operation process are given, but the protection scope of the present utility model is not limited to the following embodiments.

[0033] An embodiment of the present utility model provides a geotechnical centrifuge, referring to Figure 1 , including: a container 7, an actuator 1, a power mechanism 2, an installation mechanism 6 and a transmission mechanism 3; the actuator 1 is used to move the target object in the container 7; the power mechanism 2 is used to provide power; the installation mechanism 6 is connected to the power mechanism 2 and is used to install the power mechanism 2 on the container 7; the transmission mechanism 3 is connected to the power mechanism 2 and the actuator 1.

[0034] In some specific embodiments, the target object may be an anchor rod 703 on a geotechnical model in the container 7, and the actuator 1 pulls the anchor rod 703 to apply prestress to the anchor rod 703.

[0035] In some specific embodiments, referring to Figure 1 and Figure 2 , the container 7 is rectangular, the container 7 is paved with sandy soil, and the front wall 702 is inserted into the sandy soil, so that a first sandy soil body 701 and a second sandy soil body (not marked in the figure) are respectively formed on both sides of the front wall 702. The height of the first sandy soil body 701 is greater than that of the second sandy soil body, the height of the second sandy soil body is flush with the front wall 702, and the anchor rod 703 is arranged in the first sandy soil body 701.

[0036] In some specific embodiments, the power mechanism 2 includes a motor for generating torque and outputting rotational motion to the transmission mechanism 3.

[0037] In some embodiments of the present utility model, referring to Figure 1 and Figure 4 , the mounting mechanism 6 includes a penetrating member 601 that penetrates through the wall of the container 7. The penetrating member 601 has a hollow structure to enable communication between the inside and outside of the container 7.

[0038] In some specific embodiments, referring to Figure 1 and Figure 4 , the penetrating member 601 has a hollow columnar structure. There are holes on the end face of the container 7 for the penetrating member 601 to pass through. The axis of the penetrating member 601 is perpendicular to the end face of the container 7.

[0039] In some specific embodiments, the cross-sectional shape of the penetrating member 601 is annular.

[0040] In some embodiments of the present utility model, referring to Figure 4 , the penetrating member 601 includes a first section 6011 and a second section 6012 located inside and outside the container 7 respectively. The first section 6011 and the second section 6012 are respectively provided with threads with opposite helix directions. When the screw mounting members 602 rotate, they abut against the wall of the container 7 from the inside and outside, so that the penetrating member 601 is fixed to the container 7.

[0041] In some specific embodiments, referring to Figure 4 , the penetrating member 601 further includes a threadless section located between the first section 6011 and the second section 6012. The length of the threadless section is equal to the wall thickness value of the container 7.

[0042] In some specific embodiments, the outer wall of the first section 6011 is provided with left-handed threads, and the outer wall of the second section 6012 is provided with right-handed threads. The two screw mounting members 602 approach the wall of the container 7 from the inside and outside of the container 7 in a way of rotating left-handed on the first section 6011 and rotating right-handed on the second section 6012, and finally abut against the wall of the container 7 from both sides, thereby fixing the penetrating member 601.

[0043] In some other specific embodiments, the outer wall of the first section 6011 is provided with right-handed threads, and the outer wall of the second section 6012 is provided with left-handed threads. The two screw mounting members 602 approach the wall of the container 7 from the inside and outside of the container 7 in a way of rotating right-handed on the first section 6011 and rotating left-handed on the second section 6012, and finally abut against the wall of the container 7 from both sides, thereby fixing the penetrating member 601.

[0044] In some specific embodiments, referring to Figure 3 and Figure 4 , a sealing ring 603 is provided between the through member 601 and the hole on the end face of the container 7.

[0045] In some embodiments of the present utility model, referring to Figure 1 and Figure 3 , the installation mechanism 6 further includes an installation cavity 604, the installation cavity 604 is connected to the outer wall surface of the container 7, and the power mechanism 2 is arranged in the installation cavity 604.

[0046] In some specific embodiments, the power mechanism 2 and part of the transmission mechanism 3 are located in the installation cavity 604.

[0047] In some specific embodiments, referring to Figure 3 , an opening is provided on one side of the installation cavity 604, and the opening covers the hole on the end face of the container 7.

[0048] In some specific embodiments, referring to Figure 3 , the power mechanism 2 is arranged on the surface of the installation cavity 604 opposite to the side of the opening.

[0049] In some embodiments of the present utility model, referring to Figure 3 , the transmission mechanism 3 further includes a transmission connecting piece 304 and a transmission member. The transmission connecting piece 304 is rotatably arranged in the through member 601, and both ends of the transmission member are swingably connected to the transmission connecting piece 304 and the actuator 1 respectively.

[0050] In some specific embodiments, referring to Figure 3 , the transmission connecting piece 304 is a rod-shaped part, and the transmission connecting piece 304 is coaxially connected to the output shaft of the power mechanism 2 through a coupling.

[0051] In some specific embodiments, referring to Figure 3 , the transmission connecting piece 304 is fixed by two bearings 9 respectively arranged at the ends of the through member 601.

[0052] In some specific embodiments, referring to Figure 2 and Figure 3 , both ends of the transmission member are respectively connected to the transmission connecting piece 304 and the actuator 1 through universal joints 8.

[0053] Specifically, the universal joint 8 can be a spherical universal joint.

[0054] In some embodiments of the present utility model, the geotechnical centrifuge further includes a conversion mechanism 5, the conversion mechanism 5 includes a conversion member 501 and a conversion fixing member 502, the conversion fixing member 502 is threadedly connected to the conversion member 501, and the actuating mechanism 1 is connected to the conversion member 501 for driving the conversion member 501 to rotate and then move the target object.

[0055] In some specific embodiments, the conversion mechanism 5 can be a lead screw nut mechanism, a rack and pinion mechanism, a cam mechanism, etc., and the present utility model does not limit this.

[0056] In some specific embodiment sets, the conversion member 501 is a screw rod, the conversion fixing member 502 is provided with a screw hole matching the screw rod, and the end of the conversion member 501 is connected to the anchor rod 703 through a universal joint 8. When the conversion member 501 rotates on the conversion fixing member 502, a pulling force is applied to the anchor rod 703, thereby applying prestress.

[0057] In some specific embodiments, the conversion fixing member 502 is a plate-like structure, and the conversion fixing member 502 is arranged parallel to the front wall 702.

[0058] In some embodiments of the present utility model, the conversion fixing member 502 is arranged in the container 7 through a pressure-bearing spring 503, and the axis of the pressure-bearing spring 503 is parallel to the moving direction of the conversion member 501.

[0059] In some specific embodiments, at least two pressure-bearing springs 503 are arranged between the conversion fixing member 502 and the front wall 702 in a centrosymmetric manner with the conversion member 501 as the center.

[0060] In some embodiments of the present utility model, referring to Figure 3 , the power mechanism 2 includes a driving member 201 and a torque limiter, and the driving member 201 is connected to the transmission mechanism 3 through the torque limiter.

[0061] In some specific embodiments, the functions of the driving member 201 and the torque limiter can be realized by a torque screwdriver.

[0062] In some embodiments of the present utility model, referring to Figure 3 , the power mechanism 2 further includes a servo motor 202, and the servo motor 202 is connected to the driving member 201 through a belt drive.

[0063] In some specific embodiments, referring to Figure 3 , the driving member 201 and the servo motor 202 are fixed on the inner wall of the installation cavity 604.

[0064] In some embodiments of the present utility model, referring toFigure 2 The actuator 1 includes a magnetic member 101, and a groove matching the shape of the target object is provided on the magnetic member 101 for driving the target object after the target object enters the groove under the action of magnetic force.

[0065] In some specific embodiments, referring to Figure 2 the magnetic attracting member is a magnetic attracting sleeve for connecting the conversion member 501.

[0066] In some specific embodiments, referring to Figure 1 and Figure 3 the transmission mechanism 3 is swingably arranged on the power mechanism 2, and one end of the control mechanism 4 is arranged at the top of the container 7 and the other end is connected to the transmission mechanism 3 for driving the transmission mechanism 3 to swing so as to adjust the attitude of the transmission mechanism 3.

[0067] Specifically, during the swinging process of the transmission mechanism 3, the actuator 1 located at the end of the transmission mechanism 3 undergoes displacement both in the horizontal direction and the vertical direction of the container 7.

[0068] In some embodiments of the present invention, the transmission mechanism 3 is swingably connected to the actuator 1 and the power mechanism 2 respectively.

[0069] In some specific embodiments, referring to Figure 1 , Figure 2 and Figure 3 the transmission mechanism 3 connects the actuator 1 and the power mechanism 2 through a universal joint 8.

[0070] In some embodiments of the present invention, referring to Figure 1 and Figure 5 the transmission mechanism 3 includes a transmission member and a transmission control member 303. The transmission member includes a first transmission member 301 and a second transmission member 302, and both ends of the transmission control member 303 are swingably connected to the first transmission member 301 and the second transmission member 302 respectively.

[0071] In some specific embodiments, the first transmission member 301, the second transmission member 302 and the transmission control member 303 are all rod-shaped structures.

[0072] In some specific embodiments, referring to Figure 5 both ends of the transmission control member 303 are connected to the ends of the first transmission member 301 and the second transmission member 302 through a universal joint 8.

[0073] In some specific embodiments, referring to Figure 2 , Figure 3 and Figure 4, the first transmission member 301 is connected to the output end of the power mechanism 2, and the second transmission member 302 is connected to the execution mechanism 1.

[0074] In some embodiments of the present invention, referring to Figure 5 , the control mechanism 4 includes a control moving member 401 and a control fixing member 402. The transmission control member 303 is rotatably disposed on the control fixing member 402. The control moving member 401 is connected to the control fixing member 402. During the movement of the control moving member 401, the transmission control member 303 is driven to move. Wherein, the rotation axis of the transmission control member 303 is perpendicular to the movement path of the control moving member 401.

[0075] In some specific embodiments, the control moving member 401 can be a filament formed by weaving materials, such as steel wire.

[0076] Specifically, referring to Figure 5 , one end of the control moving member 401 is connected to the top of the container 7, and the other end is connected to the control fixing member 402. The power mechanism 2 and the target object are horizontally arranged in the container 7. During the movement of the control moving member 401, the control fixing member 402 is driven to rise or fall, thereby changing the included angle between the first transmission member 301 and the second transmission member 302 and the control fixing member 402, and realizing the horizontal movement of the execution mechanism 1.

[0077] In some embodiments of the present invention, referring to Figure 5 , the control moving member 401 includes a servo motor 4011. The servo motor 4011 is connected to the wall surface of the container 7 by bolts, and the filamentous part 4012 is connected to the output part of the servo motor 4011.

[0078] In some specific embodiments, the output part of the servo motor 4011 drives the filamentous part 4012 to rise or fall.

[0079] In some specific embodiments, the servo motor 4011 is connected to the top of the container 7 by bolts.

[0080] In some embodiments of the present invention, referring to Figure 5 and Figure 6 , the control moving member 401 includes a filamentous part 4012 and an annular part 4013. The control fixing member 402 includes a bearing part 4021. The transmission control member 303 is disposed in the bearing part 4021, and the filamentous part 4012 is connected to the annular part 4013.

[0081] In some specific embodiments, referring to Figure 5 and Figure 6, the control moving member 401 includes a filamentous portion 4012, the filamentous portion 4012 includes a first filament segment 40121 and a second filament segment 40122, the first filament segment 40121 connects the annular portion 4013 and the output portion of the servo 4011, and the second filament segment 40122 connects the annular portion 4013 and the bearing portion 4021.

[0082] In some specific embodiments, refer to Figure 6 , the bearing axis of the bearing portion 4021 is horizontally arranged and perpendicular to the first filament segment 40121.

[0083] In some embodiments of the present utility model, refer to Figure 6 , at least two bearing portions 4021 are spaced apart and arranged on the transmission control member 303.

[0084] In some specific embodiments, refer to Figure 6 , the second filament segment 40122 includes two branches connected together at one end, and the branches are respectively and correspondingly connected to the bearing portions 4021.

[0085] In some embodiments of the present utility model, refer to Figure 5 and Figure 6 , the annular portion 4013 includes a first ring body 40131 and a second ring body 40132 that are rotatably connected to each other, the first ring body 40131 is connected to the filamentous portion 4012, and the second ring body 40132 is connected to the bearing portion 4021.

[0086] In some specific embodiments, refer to Figure 6 , the annular portion 4013 includes a connecting body (not labeled in the figure), the first ring body 40131 and the second ring body 40132 are respectively rotatably arranged at both ends of the connecting body, the first ring body 40131 is connected to the first filament segment 40121, and the second ring body 40132 is connected to the second filament segment 40122.

[0087] In some specific embodiments, refer to Figure 6 , the connecting body is arranged along the radial direction of the first ring body 40131 and the second ring body 40132.

[0088] Specifically, the filamentous portion 4012 can be a steel wire.

[0089] In some embodiments of the present utility model, the moving device further includes a computer and a servo control system, and the servo control system is wirelessly connected to the power mechanism 2.

[0090] In some embodiments of the present utility model, refer to Figure 7, the quantities and positions of the actuator 1, the power mechanism 2, the transmission mechanism 3, the mounting mechanism 6, and the conversion mechanism 5 are correspondingly set according to the quantities and positions of the anchor bolts 703.

[0091] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field according to the concept of the present invention through logical analysis, reasoning, or limited experiments on the basis of the prior art should fall within the protection scope determined by the claims.

Claims

1. A geotechnical centrifuge, characterized in that: include: Container (7); An actuator (1) for moving a target object in the container (7); A power mechanism (2), used for providing power; A mounting mechanism (6) connected to the power mechanism (2) and used for mounting the power mechanism (2) on the container (7); The transmission mechanism (3) connects the power mechanism (2) and the actuator (1).

2. The geotechnical centrifuge according to claim 1, characterized in that: The mounting mechanism (6) comprises a penetration piece (601), the penetration piece (601) passes through the wall of the container (7), and the penetration piece (601) is a hollow structure so that the inside and outside of the container (7) are connected.

3. The geotechnical centrifuge according to claim 2, characterized in that: The penetration piece (601) comprises a first section (6011) and a second section (6012) respectively located inside and outside the container (7), and the first section (6011) and the second section (6012) are respectively provided with threads with opposite rotation directions, so as to abut against the wall of the container (7) from both inside and outside after the spiral mounting piece (602) is rotated, so that the penetration piece (601) is fixed to the container (7).

4. The geotechnical centrifuge according to claim 2, characterized in that: The mounting mechanism (6) further comprises a mounting cavity (604), wherein the mounting cavity (604) is connected to the outer wall surface of the container (7), and the power mechanism (2) is arranged in the mounting cavity (604).

5. The geotechnical centrifuge according to claim 2, characterized in that: The transmission mechanism (3) further comprises a transmission connecting member (304) and a transmission member, wherein the transmission connecting member (304) is rotatably arranged in the penetration member (601), and two ends of the transmission member are respectively swingably connected to the transmission connecting member (304) and the actuator (1).

6. The geotechnical centrifuge according to claim 1, characterized in that: The invention also comprises a conversion mechanism (5), wherein the conversion mechanism (5) comprises a conversion member (501) and a conversion fixing member (502), wherein the conversion fixing member (502) is threadedly connected to the conversion member (501), and the actuator (1) is connected to the conversion member (501) and is used to drive the conversion member (501) to rotate and then move the target object.

7. The geotechnical centrifuge according to claim 6, characterized in that: The conversion fixing member (502) is arranged in the container (7) via a pressure-bearing spring (503), and the axis of the pressure-bearing spring (503) is parallel to the moving direction of the conversion member (501).

8. The geotechnical centrifuge according to claim 1, characterized in that: The power mechanism (2) comprises a driving member (201) and a torque limiter, and the driving member (201) is connected to the transmission mechanism (3) via the torque limiter.

9. The geotechnical centrifuge according to claim 8, characterized in that: The power mechanism (2) further comprises a servo motor (202), and the servo motor (202) is connected to the driving member (201) via a belt transmission.

10. The geotechnical centrifuge according to claim 1, characterized in that: The actuator (1) comprises a magnetic member (101), on which a groove matching the shape of the target object is provided, for driving the target object after the target object enters the groove under the action of magnetic force.

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