Loess sample preparation instrument

Abstract

The utility model discloses a loess sample preparation instrument, which relates to the technical field of sample preparation equipment and comprises a frame, a pressing mechanism and a moving plate. The frame is provided with a top plate and a sample carrying table positioned below the top plate; the sample carrying table is provided with a pressing channel and a lower opening coaxially communicated with the pressing channel; the pressing mechanism is arranged on the top plate and provided with a load plate capable of stretching up and down, and the load plate can ascend and descend in the pressing channel; the movable plate is slidably arranged in a sliding groove formed in the side wall of the sample carrying table; the movable plate is provided with a bearing plane, a first through hole and a second through hole; an annular cutter can be placed on the bearing plane and arranged in the pressing channel in a sleeved mode. The inner diameter of the first through hole is the same as that of the annular cutter, and the outer diameter of the second through hole is the same as that of the annular cutter; the inner diameter of the lower opening is not smaller than the outer diameter of the annular cutter. The operation is simple, and the loess sample can be prepared with high precision.

Description

TECHNICAL FIELD

[0001] The utility model relates to sample preparation equipment technical field, especially a loess sample preparation instrument. BACKGROUND

[0002] The demand of loess hydrology characteristic research is growing for infrastructure construction and geological disaster prevention in loess plateau area. The key to obtain reliable hydrology parameters is to prepare qualified loess sample quickly.

[0003] However, the traditional method of preparing loess sample often depends on the complex combination of hand-operated jack and multiple mechanical devices. Such equipment is only limited to geotechnical laboratory, and it has low sample parameter control precision, poor mobility and adaptability, and complicated operation process. In practical application, these inherent defects seriously restrict the breadth and depth of loess hydrology characteristic research, especially in the in-situ test and disaster warning which need quick response.

[0004] Therefore, in order to effectively break through the above technical bottleneck, it is urgent to develop a portable, high-precision, easy-to-operate and strong operation environment adaptive sample preparation equipment. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a loess sample preparation instrument to solve the above-mentioned problems of prior art, which is simple to operate and can prepare loess sample with high precision.

[0006] To achieve the above-mentioned purpose, the utility model provides the following scheme.

[0007] The utility model provides a loess sample preparation instrument, which comprises a frame, a pressing mechanism and a moving plate. The frame has a top plate and a sample loading table below the top plate. The sample loading table has a pressing channel and a lower opening coaxially communicated with the pressing channel. The pressing mechanism is arranged on the top plate and has a load plate capable of stretching up and down. The load plate can be lifted in the pressing channel. The moving plate is slidably arranged in a sliding groove on the side wall of the sample loading table. The moving plate has a receiving plane, a first through hole and a second through hole. The receiving plane can place a ring-shaped cutter, which is sleeved in the pressing channel. The first through hole has the same inner diameter as the ring-shaped cutter, and the second through hole has the same outer diameter as the ring-shaped cutter. The inner diameter of the lower opening is not less than the outer diameter of the ring-shaped cutter.

[0008] Preferably, the top plate is provided with a first slider capable of sliding in a first direction; the first direction is perpendicular to the vertical direction; the pressing mechanism is fixedly arranged on the first slider, and the first slider is provided with a feeding mechanism; the feeding mechanism comprises a feeding bin and a material pipe, the feeding bin is fixedly arranged on the first slider; the lower end opening of the feeding bin is in communication with the upper end opening of the material pipe, and the lower end opening of the material pipe can correspond to the upper end opening of the pressing channel.

[0009] Preferably, the sample loading table is fixedly provided with a convex ring; a sample preparation sleeve is arranged in the convex ring; a first collar cover is fixedly arranged on the outer side wall of the sample preparation sleeve, and the first collar cover can be coaxially sleeved on the convex ring; the inner cavity of the sample preparation sleeve and part of the inner cavity of the convex ring jointly form the pressing channel.

[0010] Preferably, the output end of the pressing mechanism is fixedly provided with a telescopic rod; the lower end of the telescopic rod is fixedly connected with the load plate; a second collar cover is further sleeved on the telescopic rod; the second collar cover can be coaxially sleeved on the upper end of the sample preparation sleeve.

[0011] Preferably, the chute is a through structure, and the two ends of the moving plate do not protrude from the two ends of the chute; one handle is fixedly arranged at each end of the moving plate.

[0012] Preferably, the first through hole and the second through hole are respectively located on the two sides of the receiving plane.

[0013] Preferably, the lower end of the sample loading table is further provided with a plurality of supporting legs, and each supporting leg is provided with a universal wheel at the lower end.

[0014] Preferably, the sample loading table is provided with a guide groove; a supporting rod is fixedly arranged on the material pipe, a guide supporting block is fixedly arranged at the lower end of the supporting rod, and the guide supporting block is arranged in the guide groove and capable of sliding in the first direction.

[0015] Preferably, the universal wheel is provided with a locking device.

[0016] Preferably, a control valve is arranged in the material pipe, and the control valve can control the size of the flow passage at the position of the material pipe.

[0017] The utility model discloses relative to prior art has obtained following technical effect:

[0018] The loess sample preparation instrument provided by the utility model has the advantages that the frame is used as an overall support structure, the top plate and the sample loading table are provided to provide a stable installation base and an operation plane for other components, the positional relationship of the components is clear, the operator can understand and operate conveniently, the pressing mechanism is arranged on the top plate and corresponds to the pressing channel of the sample loading table, the overall structure is compact, the operation process is clear, the sample preparation is performed by applying pressure from the top, the relative position between the top plate of the frame and the sample loading table is fixed, the pressing channel is coaxially arranged with the lower opening, and accurate guidance is provided for the lifting of the load plate and the positioning of the annular cutter, the load plate of the pressing mechanism can be accurately extended up and down in the pressing channel, the pressing degree of the loess sample can be accurately controlled by controlling the lifting height and the pressure of the load plate, if the loess sample is obtained, the first through hole on the moving plate is the same as the inner diameter of the annular cutter, and the first through hole and the annular cutter can be limited and matched, if the whole of the annular cutter and the loess sample is obtained, the second through hole is the same as the outer diameter of the annular cutter, and the second through hole and the annular cutter can be matched, the whole operation is simple, and the loess sample can be prepared with high accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0020] Figure 1 The overall structure schematic diagram of the loess sample preparation instrument provided by the present utility model under the first visual angle is provided.

[0021] Figure 2 The overall structure schematic diagram of the loess sample preparation instrument provided by the present utility model under the second visual angle is provided.

[0022] Figure 3 The overall structure schematic diagram of the loess sample preparation instrument provided by the present utility model under the third visual angle is provided.

[0023] Figure 4 The cross-sectional structure schematic diagram of the loess sample preparation instrument provided by the present utility model is provided.

[0024] Figure 5 The structure schematic diagram of the moving plate in the loess sample preparation instrument provided by the present utility model is provided.

[0025] In the drawings:

[0026] 10-frame;11-top plate;111-first sliding block;12-counterforce column;13-sample loading table;131-convex ring;132-guiding groove;14-leg;15-universal wheel;

[0027] 20 - electric telescopic cylinder; 21 - telescopic rod; 22 - load plate; 23 - second ring cover;

[0028] 30 - feeding bin; 31 - material pipe; 32 - support rod; 33 - control valve;

[0029] 40 - moving plate; 41 - first through hole; 42 - receiving plane; 43 - second through hole; 44 - handle;

[0030] 50 - sample preparation sleeve; 51 - first ring cover. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings of the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0032] The utility model discloses a loess sample preparation instrument, which can solve the problems in the prior art, is simple to operate and can prepare loess samples with high precision.

[0033] In order to make the above-mentioned purposes, features and advantages of the utility model more apparent, clear and understandable, the utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0034] Embodiment one

[0035] The embodiment provides a loess sample preparation instrument, as shown in the drawings, which comprises a frame 10, a pressing mechanism and a moving plate 40. Figures 1-5 The frame 10 has a top plate 11 and a sample loading table 13 located below the top plate 11. The sample loading table 13 has a pressing channel and a lower opening coaxially communicated with the pressing channel. The pressing mechanism is arranged on the top plate 11 and has a load plate 22 capable of extending up and down, which can be lifted in the pressing channel. The moving plate 40 is slidably arranged in a sliding groove formed in the side wall of the sample loading table 13. The moving plate 40 has a receiving plane 42, a first through hole 41 and a second through hole 43. The receiving plane 42 can place a ring knife, and the ring knife is sleeved in the pressing channel. The first through hole 41 has the same inner diameter as the ring knife, and the second through hole 43 has the same outer diameter as the ring knife. The inner diameter of the lower opening is not less than the outer diameter of the ring knife.

[0036] The setting of the top plate 11 and the sample loading table 13 provides a stable mounting base and an operation plane for other components through the overall support structure of the frame 10, so that the positional relationship of each component is clear, and the operator is easy to understand and operate. The pressing mechanism is arranged on the top plate 11 and corresponds to the pressing channel of the sample loading table 13. The overall structure is compact, the operation process is clear, and the pressure is applied from the top for sample preparation. The relative position between the top plate 11 and the sample loading table 13 of the frame 10 is fixed, and the pressing channel is coaxially arranged with the lower opening, which provides accurate guidance for the lifting of the load plate 22 and the positioning of the annular knife. The load plate 22 of the pressing mechanism can accurately stretch up and down in the pressing channel. By controlling the lifting height and pressure of the load plate 22, the pressing degree of the loess sample can be accurately controlled. If the loess sample is obtained, the first through hole 41 on the moving plate 40 is the same as the inner diameter of the annular knife, and the first through hole 41 and the annular knife can be limited and matched to achieve the purpose. If the overall of the annular knife and the loess sample is obtained, the second through hole 43 is the same as the outer diameter of the annular knife, and the second through hole 43 and the corresponding part can be matched to achieve the purpose. The overall operation is simple, and the loess sample can be prepared with high precision.

[0037] Among them, the related setting of the frame 10 is explained as follows:

[0038] Specifically, the top plate 11 of the frame 10 is fixedly connected with the sample loading table 13 through the counterforce columns 12 arranged at four corners.

[0039] In the optional scheme of the present embodiment, more preferably, as shown in Figure 3 and Figure 4 The first sliding block 111 capable of sliding in the first direction is arranged on the top plate 11; the first direction is perpendicular to the vertical direction; the pressing mechanism (which can be an electric telescopic cylinder 20 connected with a necessary power supply) is fixedly arranged on the first sliding block 111, and the first sliding block 111 is provided with a feeding mechanism; the feeding mechanism includes a feeding bin 30 and a pipe 31, and the feeding bin 30 is fixedly arranged on the first sliding block 111; the lower end opening of the feeding bin 30 is in communication with the upper end opening of the pipe 31, and the lower end opening of the pipe 31 can correspond to the upper end opening of the pressing channel. The feeding mechanism is arranged on the first sliding block 111 and integrated with the pressing mechanism, realizing the integration of feeding and pressing operations; the feeding bin 30 corresponds to the upper end opening of the pressing channel through the pipe 31, which can ensure that the loess material is accurately added into the pressing channel.

[0040] In the optional scheme of the present embodiment, more preferably, as shown in Figure 2 and Figure 3 The control valve 33 is arranged in the pipe 31, and the control valve 33 can control the size of the flow passage at this position. By adjusting the control valve 33 to change the size of the flow passage, the amount of loess flowing out from the pipe 31 per unit time can be accurately controlled.

[0041] In an optional solution of the embodiment, preferably, as shown in Figures 1-4 The lower end of the sample carrier 13 is also provided with a plurality of supporting legs 14, and each supporting leg 14 is provided with a universal wheel 15 at the lower end. The universal wheel 15 can easily move the preparation instrument in all directions in the horizontal direction, whether it is to adjust the position in the laboratory or to carry the equipment to different experimental sites for work. It can be more convenient and efficient to complete, greatly saving manpower and time cost.

[0042] In an optional solution of the embodiment, preferably, the universal wheel 15 is provided with a locking device. During the preparation of loess samples, the equipment needs to be kept in a stable position to ensure the accuracy and safety of the preparation work. The locking device can effectively prevent the universal wheel 15 from accidentally rolling during equipment operation, avoid problems such as loess feeding position deviation and uneven sample preparation caused by equipment movement, and ensure the quality and precision of sample preparation.

[0043] Specifically, the locking device is of an existing structure, which will not be described in detail here. It is a device that locks the rolling of the universal wheel 15.

[0044] To increase the pressing accuracy, the following settings can also be made:

[0045] In an optional solution of the embodiment, preferably, as shown in Figure 1 , Figure 2 and Figure 4 The sample carrier 13 is fixedly provided with a convex ring 131; the convex ring 131 is provided with a sample preparation cylinder 50; the outer side wall of the sample preparation cylinder 50 is fixedly provided with a first sleeve cover 51, which can be coaxially sleeved on the convex ring 131; and the inner cavity of the sample preparation cylinder 50 and part of the inner cavity of the convex ring 131 jointly form a pressing channel. The coaxial design of the convex ring 131, the sample preparation cylinder 50 and the first sleeve cover 51 ensures that the axis of the pressing channel maintains an accurate position during the preparation of loess samples, providing accurate guidance for the subsequent pressing of the load plate 22 and the formation of loess samples, and ensuring that the sample will not be eccentric or inclined during the pressing process, thereby improving the dimensional accuracy and shape regularity of the sample.

[0046] In an optional solution of the embodiment, preferably, as shown in Figures 1-4As shown, the output end of the pressing mechanism is fixedly provided with a telescopic rod 21; the lower end of the telescopic rod 21 is fixedly connected with the load plate 22; a second sleeve cover 23 is further sleeved on the telescopic rod 21; the second sleeve cover 23 can be coaxially sleeved on the upper end of the sample preparation cylinder 50. The telescopic rod 21 can accurately transmit the pressure of the pressing mechanism to the load plate 22, so that the load plate 22 can exert uniform and stable pressure on the loess sample in the pressing channel; the second sleeve cover 23 can be coaxially sleeved on the upper end of the sample preparation cylinder 50, providing accurate positioning and guiding for the movement of the telescopic rod 21 and the load plate 22, ensuring that the load plate 22 always coincides with the axis of the sample preparation cylinder 50 during the lifting process, preventing the load plate 22 from deviating or tilting, thereby ensuring that the loess sample is uniformly stressed during the pressing process and improving the size accuracy and shape regularity of the sample.

[0047] In an optional solution of the embodiment, preferably, as shown in Figure 2 As shown, the sample loading table 13 is provided with a guide groove 132; the material pipe 31 is fixedly provided with a support rod 32, and the lower end of the support rod 32 is fixedly provided with a guide support block which is slidingly arranged in the guide groove 132 in the first direction. The cooperation of the guide groove 132 and the guide support block can accurately limit the position of the material pipe 31 in the first direction, ensuring that the material pipe 31 always moves along the set path, so that the loess can be accurately added to the target position such as the sample preparation cylinder 50, which helps to improve the consistency and accuracy of sample preparation and avoid sample preparation failure or unstable quality due to deviation of the material adding position.

[0048] Specifically, the related setting of the sliding groove on the sample loading table 13 and the moving plate 40 is as follows:

[0049] In an optional solution of the embodiment, preferably, as shown in Figure 4 As shown, the sliding groove is a through structure, and the two ends of the moving plate 40 do not protrude from the two ends of the sliding groove; one handle 44 is fixedly arranged at each end of the moving plate 40. The through sliding groove can make the sliding of the moving plate 40 more smooth, reducing the jamming phenomenon caused by the structure limitation of the sliding groove; the handles 44 arranged at the two ends of the moving plate 40 facilitate the operator to hold the handles 44 with both hands to push or pull the moving plate 40, making the movement of the moving plate 40 more easily controlled and the position of the moving plate 40 accurately adjusted as needed; the two ends of the moving plate 40 do not protrude from the sliding groove, which can prevent the moving plate 40 from colliding with other components or the operator during the sliding process, providing a certain protection function and reducing the risk of equipment damage and personnel injury.

[0050] In an optional solution of the embodiment, preferably, as shown in Figure 5As shown, the first through hole 41 and the second through hole 43 are respectively located on both sides of the receiving plane 42. The two through holes are respectively located on both sides, facilitating the switching between the first through hole 41 and the second through hole 43 and the receiving plane 42, and reducing the extension length of the moving plate 40.

[0051] Among them, the other relevant descriptions are as follows:

[0052] Specifically, the size of the load plate 22 is the same as the inner diameter of the pressing channel (i.e. the inner diameter of the sample preparation cylinder 50), the inner diameter of the sample preparation cylinder 50 is the same as the inner diameter of the annular knife, the outer diameter of the sample preparation cylinder 50 is the same as the outer diameter of the annular knife, and the annular knife is located between the lower end of the sample preparation cylinder 50 and the receiving plane 42 of the moving plate 40.

[0053] Specifically, a pressing plate can be placed between the load plate 22 and the upper end of the sample preparation cylinder 50, so as to push the sample preparation cylinder 50 downward and push the annular knife out together with the loess sample.

[0054] Specifically, the sample preparation cylinder 50 has sufficient lifting space in the convex ring 131 to continue to move downward after sample preparation, facilitating the ejection of the annular knife.

[0055] Specifically, the loess sample preparation instrument of the embodiment not only solves the problems of space occupation and complex operation of traditional equipment, but also has the characteristics of small size and portability, facilitating use in various geological environments; at the same time, by carrying a high-precision test control system, the test process is more simple and efficient, greatly improving the efficiency, accuracy and reliability of test data acquisition.

[0056] Use steps:

[0057] (1) Collect enough remolded loess samples in the field, bake the remolded loess samples in an oven, crush and sieve through a 2mm soil sieve, and prepare target moisture content remolded loess samples by adding appropriate experimental distilled water, and seal the prepared target moisture content loess samples for 48h;

[0058] (2) Assemble all parts of the loess sample preparation instrument, and the connection methods mainly include:

[0059] a. Four universal wheels 15 are installed at the bottom of the four legs 14, which are in the same horizontal plane as the ground;

[0060] b. The sample loading table 13 is installed at the bottom of the four counterforce columns 12, and the moving plate 40 is slidably arranged inside the sample loading table 13 and can be pushed and pulled in the sample loading table 13 through the sliding groove;

[0061] c. The first sleeve cover 51 of the sample preparation cylinder 50 can be nested on the convex ring 131 on the upper part of the sample loading table 13;

[0062] d. The electric telescopic cylinder 20 can be connected with the external control system, mainly to control the speed and displacement of the electric telescopic cylinder 20; the bottom of the electric telescopic cylinder 20 is connected with the load plate 22 through the telescopic rod 21, and the second sleeve cover 23 can be sleeved on the upper end of the sample preparation cylinder 50;

[0063] e. The upper part of the top plate 11 is provided with a movable feeding bin 30, which is connected to the top of the sample preparation cylinder 50 through a material pipe 31 passing through the top plate 11; the movable feeding bin 30 can move back and forth through the first sliding block 111 arranged on the top plate 11, so as to facilitate the filling of soil materials.

[0064] (3) After all parts are assembled, the direction of the universal wheel 15 is fixed, and the reliability of the sample preparation instrument is detected. After stabilization, relevant sample preparation work can be carried out;

[0065] (4) Before sample preparation, first select the target sample size, smear a layer of vaseline on the inner wall or outer wall of the annular cutter (convenient for demolding later), and place it on the receiving plane 42 in the pressing channel of the sample loading table 13;

[0066] (5) According to the test requirements (target dry density of soil), calculate the required soil mass through the relevant formula, take the target mass of soil and divide it into three equal parts, which is convenient for adding to the feeding bin 30 in sequence later;

[0067] (6) Fix the moving plate 40 on the sample loading table 13 at the receiving plane 42 position, take a target soil, add it to the feeding bin 30, move the feeding bin 30 away through the first sliding block 111, place the load plate 22 on the top of the sample preparation cylinder 50, and set the second sleeve cover 23 on the upper end of the sample preparation cylinder 50 to prevent soil from overflowing during pre-pressing. Operate the control system in the electric telescopic cylinder 20 to press the soil to the target height through the load plate 22, and continue to operate the electric telescopic cylinder 20 to return, at the same time, the surface of the soil sample that has been pre-pressed is shaved by a small knife; repeat the above steps until three samples are added to the annular cutter in the sample preparation cylinder 50;

[0068] (7) After the target mass of soil is added to the sample preparation cylinder 50 and pre-pressed, the last pre-pressing needs to be static for 5 minutes to prevent unloading rebound. After the static time is completed, the external load can be removed by operating the control system of the electric telescopic cylinder 20;

[0069] (8) Move the moving plate 40 to the first through hole 41 or the second through hole 43 position through the external handle 44 of the moving plate 40, open the electric telescopic cylinder 20 again, and complete the demolding of the sample. Thus, the operation of preparing the loess sample is completed, and the target loess sample or the whole of the target loess sample and the annular cutter is obtained.

[0070] The principle and implementation mode of the utility model are described by applying specific examples, and the above embodiment is only used for helping to understand the method and core idea of the utility model; meanwhile, for the general technical personnel in the field, the specific implementation mode and application range will be changed according to the idea of the utility model. In conclusion, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A loess sample preparation instrument, characterized by: Frame, pressing mechanism and moving plate are included. The frame has a top plate and a sample loading platform below the top plate; the sample loading platform has a pressing channel and a lower opening coaxially communicating with the pressing channel; The pressing mechanism is arranged on the top plate, and has a load plate capable of stretching up and down; the load plate can be lifted and lowered in the pressing channel; The moving plate is slidingly arranged in a sliding groove formed in the side wall of the sample loading platform; the moving plate has a receiving plane, a first through hole and a second through hole; The receiving plane can place a ring-shaped cutter, the ring-shaped cutter is sleeved in the pressing channel; the first through hole has the same inner diameter as the ring-shaped cutter, and the second through hole has the same outer diameter as the ring-shaped cutter; the inner diameter of the lower opening is not less than the outer diameter of the ring-shaped cutter.

2. The loess sample preparation apparatus according to claim 1, characterized in that: A first sliding block capable of sliding in a first direction is arranged on the top plate; the first direction is perpendicular to the vertical direction; The pressing mechanism is fixedly arranged on the first sliding block, and a feeding mechanism is arranged on the first sliding block; The feeding mechanism includes a feeding bin and a pipe; the feeding bin is fixedly arranged on the first sliding block; the lower end opening of the feeding bin communicates with the upper end opening of the pipe, and the lower end opening of the pipe can correspond to the upper end opening of the pressing channel.

3. The loess sample preparation apparatus of claim 1, wherein: A convex ring is fixedly arranged on the sample loading platform; a sample preparation sleeve is arranged in the convex ring; a first collar cover is fixedly arranged on the outer side wall of the sample preparation sleeve; the first collar cover can be coaxially sleeved on the convex ring; The inner cavity of the sample preparation sleeve and part of the inner cavity of the convex ring jointly form the pressing channel.

4. The loess sample preparation apparatus according to claim 3, characterized in that: An extension rod is fixedly arranged on the output end of the pressing mechanism; the lower end of the extension rod is fixedly connected with the load plate; A second collar cover is also sleeved on the extension rod; the second collar cover can be coaxially sleeved on the upper end of the sample preparation sleeve.

5. The loess sample preparation apparatus of claim 1, wherein: The sliding groove is a through structure, and the two ends of the moving plate do not protrude from the two ends of the sliding groove; a handle is fixedly arranged on each end of the moving plate.

6. The loess sample preparation apparatus according to claim 5, characterized in that: The first through hole and the second through hole are respectively located on the two sides of the receiving plane.

7. The loess sample preparation apparatus of claim 1, wherein: A plurality of supporting legs are arranged on the lower end of the sample loading platform; universal wheels are arranged on the lower end of each supporting leg.

8. The loess sample preparation apparatus according to claim 2, characterized in that: A guide groove is arranged on the sample loading platform; a supporting rod is fixedly arranged on the pipe; a guide supporting block is fixedly arranged on the lower end of the supporting rod; the guide supporting block is slidingly arranged in the guide groove in the first direction.

9. The loess sample preparation apparatus of claim 7, wherein: Locking devices are arranged on the universal wheels.

10. The loess sample preparation apparatus of claim 2, wherein: A control valve is arranged in the pipe; the control valve can control the size of the flow passage at the position of the pipe.

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