A material sampling device

Abstract

The present invention discloses a material sampling device, which includes an operation handle, a material trough, and a number of material shovels that are distributed around the same central axis in a circular pattern; all the material shovels are fixedly relative to each other and are rotatably connected to the operation handle around the central axis; the material trough is fixed to the operation handle at an angle with the trough opening facing upwards; the outer edges of all the material shovels overlap on the same circumference; the shovel mouth of any one of the material shovels faces the radial direction of the central axis, and the cutting edge of any one of the shovel mouths overlaps on the circumference; when any one of the shovel mouths is distributed downwards, it is aligned with the trough opening. This material sampling device can be used for quickly, continuously, and multi-point sampling of materials laid on the working surface. The operation of this material sampling device is simple and efficient, and it can quickly complete the sampling requirements of a large number of sampling points, thus taking into account both the sampling efficiency and the sampling accuracy.

Description

Technical Field

[0001] The present invention relates to the field of ore dressing, and particularly to a material sampling device. Background Art

[0002] The amount of sample required for assay is extremely small. Therefore, how to reduce a representative material from the test ore sample often becomes a key step in accurately measuring the material. For this reason, there are many sampling methods at present, such as dichotomy scaling, quadrant scaling, ring cone method, and grid method, among which the grid method sampling has the best effect.

[0003] When sampling by the grid method, first mix the materials evenly, then use tools such as glass rods or rulers to spread the materials into a thin layer of the same thickness, and then divide the thin layer into multiple square grids with roughly the same size. Secondly, use sampling tools such as small spoons or small shovels to obtain an appropriate amount and equal amount of materials from each small square, and finally mix the materials dug many times together. In this process, the more the number of selected square grids, the more representative the sample. However, if sampling the materials in several square grids one by one, it will inevitably lead to cumbersome and time-consuming operations. It can be seen that in the prior art, the sampling efficiency and sampling accuracy are contradictory to each other. Summary of the Invention

[0004] The purpose of the present invention is to provide a material sampling device, which can significantly improve the sampling efficiency while ensuring the sampling accuracy.

[0005] To achieve the above purpose, the present invention provides a material sampling device, including an operation handle, a material trough, and several material shovels annularly arranged around the same central axis; all the material shovels are relatively fixed to each other and are rotationally connected to the operation handle with the central axis as the rotation axis; the material trough is fixed to the operation handle at an angle with the trough opening facing upwards; the outer edges of all the material shovels overlap on the same circumference; the shovel mouth of any one of the material shovels faces the radial direction of the central axis, and the cutting edge of any one of the shovel mouths overlaps on the circumference; when any one of the shovel mouths is distributed downwards, it is aligned with the trough opening.

[0006] Preferably, all the material shovels are evenly distributed around the central axis.

[0007] Preferably, all the material shovels are located on the same plane.

[0008] Preferably, any one of the material shovels is a fan-shaped material shovel; the arc surfaces of all the fan-shaped material shovels coincide on the same circumference.

[0009] Preferably, it further includes a circular turntable rotationally connected to the operation handle; all the material shovels are fixed to the circular turntable; the radius of the circular turntable is equal to the maximum distance of the material shovel from the central axis.

[0010] Preferably, the thickness of the circular turntable is any value within the range of 1 to 2 mm.

[0011] Preferably, a plurality of teeth extending radially outward are provided on the circumferential side of the circular turntable; the radius of the circular turntable is equal to the maximum distance of any one of the teeth from the central axis of the circular turntable.

[0012] Preferably, the circular turntable is provided with load blocks.

[0013] Preferably, the material chute is fan-shaped; the apex angle of the material chute overlaps with the central axis; the outer edge of the material chute is adjacent to the inner edge of the adjacent material shovel.

[0014] Preferably, all the material shovels include a plurality of first material shovels and a plurality of second material shovels; the openings of all the first material shovels face the same direction; the openings of the second material shovels face the same direction; the opening of any one of the first material shovels faces the opposite direction to the opening of any one of the second material shovels.

[0015] Compared with the above background art, the material sampling device provided by the present invention includes an operating handle, a material chute, and a plurality of material shovels arranged around the same central axis in a ring shape; all the material shovels are relatively fixed to each other and are rotatably connected to the operating handle with the central axis as the center; the material chute is fixed to the operating handle at an angle with the notch facing upward; the outer edges of all the material shovels overlap on the same circumference; the notch of any one of the material shovels is tangent to the circumference; when any notch is distributed downward, it is aligned with the notch.

[0016] An operator can sample the materials laid on the working surface through this material sampling device. When sampling, all the material shovels of this material sampling device are successively shoveled into the materials and roll along the working surface, so that all the material shovels can continuously shovel up the materials at different sampling positions and centrally collect them in the material chute.

[0017] It can be seen that this material sampling device is simple and convenient to operate, has high sampling efficiency and the samples are representative, realizes efficient and accurate sampling of powdery materials, can meet the different requirements of various scenarios, and takes into account both sampling efficiency and sampling accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0019] Figure 1Schematic structural diagram of the material sampling device provided by the embodiment of the present invention;

[0020] Figure 2 is Figure 1 exploded view of;

[0021] Figure 3 Schematic structural diagram of the operating handle provided by the embodiment of the present invention;

[0022] Figure 4 Schematic structural diagram of the material trough provided by the embodiment of the present invention;

[0023] Figure 5 Schematic structural diagram of the material shovel provided by the embodiment of the present invention.

[0024] Wherein, 1 - support rod, 11 - positioning hole, 2 - holding handle, 3 - bolt, 4 - circular turntable, 5 - material shovel, 51 - material shovel mounting hole, 52 - shovel mouth, 6 - bearing, 7 - material trough, 71 - positioning column. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] In order to enable those skilled in the art in this technical field to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0027] Please refer to Figures 1 to 5 , Figure 1 Schematic structural diagram of the material sampling device provided by the embodiment of the present invention; Figure 2 is Figure 1 exploded view of; Figure 3 Schematic structural diagram of the operating handle provided by the embodiment of the present invention; Figure 4 Schematic structural diagram of the material trough provided by the embodiment of the present invention; Figure 5 Schematic structural diagram of the material shovel provided by the embodiment of the present invention.

[0028] The present invention provides a material sampling device, including an operating handle, a material trough 7 fixed to the operating handle, and a plurality of material shovels 5 installed on the operating handle.

[0029] The material trough 7 is fixed to the operating handle at an angle with the trough mouth facing upward. That is to say, during normal operation, regardless of whether the user moves the operating handle, the trough mouth of the material trough 7 always faces upward and is open.

[0030] All the material shovels 5 are distributed around the same central axis, including but not limited to the material shovels 5 being arranged in a row around the central axis in the same plane. At the same time, all the material shovels 5 are relatively fixed to each other; all the material shovels 5 are rotatably connected to the operating handle with the aforementioned central axis as the rotation axis. Among them, bearings 6 can be provided at the rotation connection between all the material shovels 5 and the operating handle.

[0031] The outer edges of all the material shovels 5 overlap on the same circumference; among them, the outer edge of the material shovel 5 refers to the local contour of the material shovel 5 with the largest distance from the aforementioned central axis. For example, when only the cutting edge of the shovel mouth of the material shovel 5 has the largest distance from the central axis, the outer edge of the material shovel 5 refers to the cutting edge of the shovel mouth; when the entire shovel bottom surface of the material shovel 5 is an arc surface and the distance from any point of the arc surface to the central axis is the maximum distance, the outer edge of the material shovel 5 refers to the entire shovel bottom surface including the cutting edge of the shovel mouth.

[0032] The material sampling device uses the circumference where the outer edges of all the material shovels 5 are located as the rolling surface, and realizes the rolling surface fitting the working surface and rolling under the drive of the operating handle. In this material sampling device, the cutting edge of any material shovel coincides with the aforementioned rolling surface, and the cutting edge of any material shovel intersects with the axial end surface of the rolling surface. For example, the aforementioned cutting edge is parallel to the axis of the rolling surface to ensure that when all the material shovels 5 roll relative to the working surface, the material laid on the working surface can be shoveled into the cavity of the material shovel 5 from the cutting edge. Based on the aforementioned structure, when the material shovel 5 of the material sampling device rotates around the central axis and rolls while fitting the working surface, the shovel mouth 52 sometimes faces upward to shovel up the material laid on the working surface, and sometimes faces downward to align with the material chute 7 and dump the material.

[0033] It can be seen that the material sampling device provided by the present invention is used for material sampling. When the working surface is laid with materials, the material sampling device can make the rolling surface formed by all the material shovels 5 fit the working surface, and use the operating handle to drive all the material shovels 5 to rotate around the central axis. During the process of all the material shovels 5 rotating around the central axis, any one of the material shovels 5 includes the following several motion states:

[0034] (1) Rotating from the shovel mouth 52 facing downward to the shovel mouth 52 being horizontal; during this process, the material shovel 5 rotates from being away from the working surface to fitting the working surface;

[0035] (2) Rotating from the horizontal state of the shovel mouth 52 in the aforementioned (1) to the shovel mouth 52 facing upward; during this process, the material shovel 5 rotates from fitting the working surface to being away from the working surface;

[0036] (3) Rotating from the shovel mouth 52 facing upward in the aforementioned (2) to the state where the shovel mouth 52 faces downward in the aforementioned (1).

[0037] During the above three movement processes, the rolling surface maintains the same rolling direction, for example, always rolling clockwise or always rolling counterclockwise. Among them, during the movement process of any one of the material shovels 5 in the above (1), the shovel mouth 52 of the material shovel 5 gradually inserts into the material on the surface of the working face, and as the shovel mouth 52 deflects towards the horizontal angle, the aforementioned material is put into the cavity of the material shovel 5. During the movement process of any one of the material shovels 5 in the above (2), the material shoveled into the material shovel 5 slides down along the inner wall of the cavity of the material shovel 5 and finally settles at the bottom of the cavity of the material shovel 5. During the movement process of any one of the material shovels 5 in the above (3), the material shoveled into the material shovel 5 pours out from its shovel mouth 52. Since the shovel mouth 52 is opposite to the notch of the material chute 7, therefore, the aforementioned material shovel 5 pours the material inside it into the material chute 7.

[0038] Since the material sampling device has multiple material shovels 5 at the same time, when an operator drives all the material shovels 5 to roll around the central axis through the operating handle, all the material shovels 5 sequentially realize shoveling materials and centrally discharging the materials into the material chute 7 according to the above movement processes.

[0039] In summary, an operator can quickly sample the materials laid on the working face through the material sampling device. Based on the relative position relationship and movement relationship of all the material shovels 5, the material sampling device is equivalent to quickly and continuously sampling multiple sampling points at different positions during the sampling process. The actual sampling effect is equivalent to the sampling effect obtained by using the grid method sampling principle. However, compared with the current conventional grid method sampling method, the operation of the material sampling device is simpler and the efficiency is higher. Among them, when sampling materials according to the grid method sampling principle, the number of sampling points and the sampling efficiency are usually two contradictory parameters, and the number of sampling points is an important factor determining the sampling accuracy; in contrast, using the material sampling device can greatly reduce the interference of the number of sampling points on the sampling efficiency and balance the sampling efficiency and sampling accuracy.

[0040] Next, in combination with the drawings and embodiments, the material sampling device provided by the present invention will be further described.

[0041] In the above material sampling device, all the material shovels 5 can be evenly distributed around the central axis. When using the material sampling device with the above structural characteristics, all the material shovels 5 can achieve equidistant sampling of the materials laid on the working face, thus meeting the operation standards of the grid method sampling principle.

[0042] It should be noted here that the uniform distribution of all the material shovels 5 around the central axis can be divided into the following two situations:

[0043] When the shoveling openings 52 of all the material shovels 5 face the same direction, when the operating handle drives all the material shovels 5 to rotate one week in the same direction, any one of the material shovels 5 can shovel the material laid on the working surface. At this time, the central angles between any two adjacent material shovels 5 are equal.

[0044] When all the material shovels 5 include a plurality of first material shovels with the same orientation and a plurality of second material shovels with the same orientation, and the orientations of the first material shovels and the second material shovels are opposite, when the operating handle drives all the material shovels to rotate one week in the first direction, only all the first material shovels can shovel the material laid on the working surface. At this time, all the second material shovels will not shovel the material. On the contrary, when the operating handle drives all the material shovels to rotate one week in the second direction, only all the second material shovels can shovel the material laid on the working surface. At this time, all the first material shovels will not shovel the material. Therefore, the fact that all the material shovels mentioned above are evenly distributed around the central axis actually means that the central angles between any two adjacent first material shovels are equal, and the central angles between any two adjacent second material shovels are equal, and it is not required that the first material shovels must be located on the angular bisector of two adjacent second material shovels.

[0045] Among them, the above-mentioned first direction and second direction can be regarded as the clockwise direction and counterclockwise direction of the circumference where all the material shovels 5 are located respectively.

[0046] In addition to the direction of the shoveling opening 52 of the material shovel 5, for the material sampling device provided by the present invention, all the material shovels 5 can be positioned and installed on the same plane, or can be positioned and installed on different planes. Taking the case where all the material shovels 5 are located on the same plane as an example, when an operator uses this material sampling device, the operator can drive all the material shovels 5 to roll along the same straight line through the operating handle. Then all the material shovels 5 are equivalent to taking materials from multiple sampling positions located on the same straight line. By analogy, when all the material shovels 5 are located on two planes, when the operator pulls the operating handle to move once, all the material shovels 5 are equivalent to taking materials from multiple sampling positions located on two straight lines at the same time.

[0047] Of course, if all the material shovels 5 are positioned and installed on different planes, the material trough 7 of this material sampling device should be aligned with each of the material shovels 5 in different planes to ensure that the material shoveled by any one of the material shovels 5 can be put into the material trough 7.

[0048] For the convenience of operation, the above-mentioned material shovel 5 can be specifically set as a fan-shaped material shovel.

[0049] Viewed only in the fan surface direction of the fan-shaped material shovel, the fan-shaped material shovel is a planar fan shape. The arc edge of the fan-shaped material shovel is the outer edge of the fan-shaped material shovel, and the two straight edges on both sides of the fan-shaped material shovel are the first side and the second side of the fan-shaped material shovel respectively; the first side refers to the side where the shovel mouth 52 is located. The first side serves as the passage for materials to enter and leave the fan-shaped material shovel, and the second side is a closed surface, causing the fan-shaped material shovel to form a shell cavity structure that is only open on the first side. Among them, the central angle of the aforementioned planar fan can be any value between 60° and 160°.

[0050] Based on the three-dimensional structure of the fan-shaped material shovel, the aforementioned arc edge is actually the projection of the arc surface of the fan-shaped material shovel in the fan surface direction. In the material sampling device provided by the present invention, the arc surfaces of all the fan-shaped material shovels coincide with the same circumference. When the operator drives all the fan-shaped material shovels to roll along the working surface through the operating handle, all the fan-shaped material shovels successively fit with the working surface.

[0051] Furthermore, the above-mentioned material sampling device further includes a circular turntable 4; all the material shovels 5 are distributed in a circular array around the center of the circular turntable 4, so as to realize the relative fixation of all the material shovels 5. It can be seen that the center of the circular rotating shaft is on the central axis of all the material shovels 5, and the operating handle can be fixedly hinged to the center of the circular rotating shaft.

[0052] In the above structure, the radius of the circular turntable 4 is not greater than the maximum distance of any material shovel 5 from the central axis, ensuring that the material shovel 5 can contact the surface of the working surface, so as to shovel the material laid on the working surface.

[0053] Generally, the radius of the circular turntable 4 is equal to the maximum distance of the material shovel 5 from the central axis. In short, if the material shovel 5 fits on the working surface, the circumferential surface of the circular turntable 4 can also fit on the working surface. The purpose of this setting is to use the circular turntable 4 to divide the material layer laid on the working surface, which is convenient for the material shovel 5 to shovel in from above the material, and at the same time ensure that the material shovel 5 can shovel the material at the bottom of the material layer, ensuring that the shoveled sample is representative. Among them, the aforementioned material layer refers to a layered structure formed by materials uniformly laid on the working surface with a specific thickness.

[0054] For the above functions of the circular turntable 4, the circular turntable 4 can also have the following characteristics.

[0055] The thickness of the circular turntable 4 can be set to 1 - 2 mm. Compared with the thickness of the material shovel 5, the thickness of the circular turntable 4 is significantly thinner, and it can play a role in cutting and dividing materials in a shape structure similar to a blade, ensuring that the arc surface of the material shovel 5 flush with the circular turntable 4 can fit on the working surface.

[0056] A number of radially outwardly extending teeth may be provided on the circumferential side of the circular turntable 4, making the circular turntable 4 have a shape structure similar to that of a gear. Obviously, for the circular turntable 4 with the aforementioned teeth, the maximum distance of any tooth from the central axis of the circular turntable 4 is regarded as the radius of the circular turntable 4. The aforementioned teeth can also play a role in piercing the material layer laid on the working surface, which is conducive to assisting the material shovel 5 to shovel in from above the material.

[0057] In addition, a load-bearing block may be provided on the circular turntable 4. The load-bearing block is fixed to the axial end face of the circular turntable 4, for example, it can be fixed to the center of the axial end face of the circular turntable 4. The load-bearing block can increase the mass of the circular turntable 4, enabling the circular turntable 4 to cut through the material layer laid on the working surface according to its own weight.

[0058] Of course, the circular turntable 4 can also combine two or all of the features of the thin plate structure, teeth, and load-bearing block.

[0059] In order to facilitate adjusting the sampling effect of the material sampling device at different sampling positions, when using the circular turntable 4 to install the material shovel 5, a number of mounting holes may be provided on the surface of the circular turntable 4. Correspondingly, a material shovel mounting hole 51 is provided on the surface of the material shovel 5. The material shovel 5 is assembled in the mounting hole through fasteners such as bolts 3. Obviously, the operator can adjust the mounting position of the material shovel 5 on the circular turntable 4 according to the spacing between adjacent sampling positions during the sampling operation.

[0060] As for the material chute 7 used in the present invention, it can also be set as a fan-shaped structure.

[0061] The material chute 7 and the operating handle can be relatively fixed and detachably connected through the positioning hole 11 and the positioning column 71. It can either separately disassemble the material chute 7 after sampling to transfer the sample, or ensure the movement stability of the material chute 7 during the use of the material sampling device to prevent the material collected in the material chute 7 from leaking outwards.

[0062] Furthermore, the apex angle of the fan-shaped material chute 7 can overlap with the central axis of all the material shovels 5. At the same time, the outer edge of the material chute 7 is adjacent to the inner edge of the adjacent material shovel 5, preventing material leakage due to excessive spacing when the material shovel 5 dumps the material into the material chute 7.

[0063] In addition, compared with the material shovel 5, the material chute 7 is used to centrally collect the materials shoveled by all the material shovels 5. Therefore, the size of the material chute 7 is significantly larger than that of the material shovel 5, including but not limited to the dimension of the material chute 7 in the fan surface direction being greater than the dimension of the material chute 7 in the fan surface direction. Among them, the central angle of the material chute 7 can be set to any value between 90° and 170°.

[0064] As for the operating handle, it may specifically include a support rod 1 and a holding handle 2; the support rod 1 is provided with a positioning hole 11 for inserting the positioning column 71 of the material chute 7, which can realize the positioning installation of the material chute 7; the holding rod is fixedly connected to the support rod 1 and is used for the operator to hold.

[0065] When using this material sampling device, first, the materials are finely mixed and then spread flat on the working surface to form a material layer with a certain thickness; then, place the material sampling device at the outer edge of the material layer at an angle where the plane of the plurality of material shovels 5 is perpendicular to the aforementioned material layer; then, the operator pulls the operating handle to move, so that all the material shovels 5 roll relative to the material layer to realize shoveling the materials.

[0066] Among them, the operator usually pulls the operating handle to move along a straight line, so that all the material shovels 5 sample at a plurality of sampling positions located on the aforementioned straight line. After sampling at a plurality of sampling positions on one straight line is completed, the operator can move the material sampling device to another straight line to sample at a plurality of sampling positions on the other straight line. And so on. When the operator completes sampling at a plurality of sampling positions on multiple straight lines using this material sampling device, this material sampling device actually samples the material layer according to the grid sampling principle.

[0067] It should be noted that when using this material sampling device, the orientation of the shovel mouth 52 of the material shovel 5 is the same as the movement direction of the operating handle. Refer to Figure 1 , Figure 1 In, for the material layer spread flat on the working surface, the material sampling device can be placed at the leftmost end of the material layer, and then the operating handle is pulled to move from the leftmost end to the rightmost end of the material layer; during this process, the circular structure enclosed by all the material shovels 5 rotates clockwise relative to the material layer. For some of the material shovels 5 that rotate from far away from the material layer to close to the material layer, their shovel mouths 52 face downward or are inclined downward, and as the material sampling device moves, they will gradually rotate to Figure 1 the angle of the lowest material shovel 5 in. During this process, the shovel mouth 52 of the material shovel 5 inserts into the material layer and shovels the materials. As the material sampling device continues to move to the right, the lowest material shovel 5 in Figure 1 will rotate clockwise. During this process, the shovel mouth 52 is adjusted from horizontal to upward, so that the shoveled materials fall to the bottom of the cavity of the material shovel 5. After the material sampling device continues to move to the right, the shovel mouth 52 of the material shovel 5 transitions from upward to inclined downward and downward. At this time, the materials shoveled by the material shovel 5 are poured into the material chute 7.

[0068] In summary, the material sampling device can continuously scoop up the materials in the material layer at equal or unequal intervals and centrally collect them in the material trough 7, achieving continuous sampling. The material sampling device is simple and convenient to operate, has high sampling efficiency, and the samples taken are representative, realizing efficient and accurate sampling of powdery materials and being applicable to different requirements in various scenarios.

[0069] The above has introduced the material sampling device provided by the present invention in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A material sampling device, characterized in that: The invention comprises an operating handle, a material trough (7), and a plurality of material shovels (5) arranged around the same central axis; all the material shovels (5) are fixed relative to each other and are rotatably connected to the operating handle with the central axis as the rotation axis; the material trough (7) is fixed to the operating handle at an angle with the notch facing upward; the outer edges of all the material shovels (5) overlap on the same circumference; the shovel opening (52) of any of the material shovels (5) faces the radial direction of the central axis, and the shovel edge of any of the shovel openings (52) overlaps on the circumference; and any of the shovel openings (52) is aligned with the notch when distributed downward. It also includes a circular turntable (4) rotatably connected to the operating handle, all the material shovels (5) are fixed to the circular turntable (4), and a plurality of teeth extending radially outward are provided on the circumference of the circular turntable (4).

2. The material sampling device according to claim 1, characterized in that: All the material shovels (5) are evenly distributed around the central axis.

3. The material sampling device according to claim 1, characterized in that: All the material shovels (5) are located in the same plane.

4. The material sampling device according to claim 1, characterized in that: Any of the material shovels (5) is specifically a fan-shaped material shovel; the arc surfaces of all the fan-shaped material shovels coincide with the same circumference.

5. The material sampling device according to claim 1, characterized in that: The radius of the circular turntable (4) is equal to the maximum distance between the material shovel (5) and the central axis.

6. The material sampling device according to claim 5, characterized in that: The thickness of the circular turntable (4) is any value between 1 and 2 mm.

7. The material sampling device according to claim 5, characterized in that: The radius of the circular turntable (4) is equal to the maximum distance between any one of the teeth and the central axis of the circular turntable (4).

8. The material sampling device according to claim 5, characterized in that: The circular turntable (4) is provided with a weight block.

9. The material sampling device according to claim 1, characterized in that: The material trough (7) is fan-shaped; the top corner of the material trough (7) overlaps the central axis; the outer edge of the material trough (7) is adjacent to the inner edge of the adjacent material shovel (5).

10. The material sampling device according to claim 1, characterized in that: All the material shovels (5) include a plurality of first material shovels and a plurality of second material shovels; the shovel openings (52) of all the first material shovels are oriented in the same direction; the shovel openings (52) of the second material shovels are oriented in the same direction; the shovel openings (52) of any one of the first material shovels are oriented in opposite directions to the shovel openings (52) of any one of the second material shovels.

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