A sampling device for coal resource development

Abstract

The present invention relates to the technical field of coal sampling, and in particular to a sampling device for coal resource exploitation, comprising an outer cylinder and an inner cylinder; the inner cylinder is connected to the outer cylinder, and the inner cylinder is made of elastic metal material; a plurality of outer material ports are provided on the outer cylinder; a plurality of sliding grooves are provided in the outer cylinder; a plurality of extrusion parts are provided at each outer material port on the outer cylinder; a plurality of inner material ports are provided on the inner cylinder; each inner material port corresponds to an adjacent outer material port one-to-one; a plurality of storage cavities are provided in the inner cylinder, and each storage cavity is connected to and corresponds to an adjacent outer material port one-to-one; an edge part is provided at each inner material port on the inner cylinder. The present invention realizes that the raised part of the scraper scrapes the coal pile, so that the scraped coal enters the storage cavity in the inner cylinder under the action of gravity, so that the storage cavity is gradually filled with coal, and the coal is prevented from being too compacted after being squeezed by the outer cylinder, which makes it difficult for the coal to fall into the storage cavity, thereby affecting the sampling of the coal by the device.

Description

Technical Field

[0001] The invention relates to the technical field of coal sampling, in particular to a sampling device for coal resource exploitation. Background Art

[0002] Coal sampling is a technical process used to ensure coal quality control and analysis, such as calorific value determination, ash content, sulfur content, etc. The correct sampling method is crucial to ensure the accuracy of the test results.

[0003] When sampling coal, in order to obtain more representative samples to accurately reflect the quality status of the entire batch of coal, a stratified sampler is usually used to sample coal at different depths of the coal pile. During the sampling process, since the stratified sampler squeezes the coal during the insertion of the coal pile, the squeezed coal will become compacted, resulting in the sampling port on the stratified sampler being opened. The compacted coal is difficult to enter the storage chamber in the stratified sampler from the sampling port. Although in the prior art, the staff will scratch the coal by making the stratified sampler perform alternating rotational motion to soften the coal so that the coal can enter the storage chamber, if the coal is relatively humid, the squeezed coal will become even more compact. However, the alternating rotational motion of the stratified sampler has a very poor scratching effect on the coal, which is difficult to meet the sampling requirements. Summary of the invention

[0004] In order to overcome the problem that the coal has high humidity and the squeezed coal becomes more compact, and the scratching effect of the stratified sampler on the coal is extremely poor by simply making alternating rotational motion, which makes it difficult to meet the sampling requirements, the present invention provides a sampling device for coal resource exploitation.

[0005] The technical scheme is: a sampling device for coal resource exploitation, including an outer cylinder and an inner cylinder; the inner cylinder is connected to the outer cylinder, and the inner cylinder is made of elastic metal material; a plurality of outer material ports are opened on the outer cylinder; a plurality of sliding grooves are opened in the outer cylinder; a plurality of extrusion parts are arranged at each outer material port on the outer cylinder; a plurality of inner material ports are opened on the inner cylinder; each inner material port corresponds to an adjacent outer material port one by one; a plurality of storage cavities are arranged in the inner cylinder, each storage cavity is connected to an adjacent outer material port and corresponds to the adjacent outer material port one by one; each inner material port on the inner cylinder is arranged There is an edge portion; it also includes a first protrusion, a second protrusion, a scraper and a connecting plate; each inner material port on the inner cylinder is connected to a plurality of first protrusions; each inner material port on the inner cylinder is connected to a plurality of second protrusions; each first protrusion and second protrusion are located in adjacent sliding grooves; each outer material port on the outer cylinder is connected to a plurality of scrapers for scraping coal, and the scrapers are made of deformable plates; each adjacent two scrapers are fixedly connected to a connecting plate for shoveling coal; each adjacent two connecting plates are provided with an inclined surface.

[0006] Furthermore, it also includes a first handle and a second handle; the first handle is fixedly connected to the upper side of the outer tube; and the second handle is fixedly connected to the upper side of the inner tube.

[0007] Furthermore, each first protrusion protrudes from an adjacent inner material opening; and each second protrusion protrudes from an adjacent inner material opening.

[0008] Furthermore, each first bump is configured to be hemispherical; and each second bump is configured to be hemispherical.

[0009] Furthermore, each scraper is provided with a plurality of semicircular grooves.

[0010] Furthermore, each inner material opening is arranged at an inclination.

[0011] Furthermore, it also includes a third protrusion; a plurality of third protrusions are fixedly connected to the inner cylinder; each third protrusion slides in the sliding groove; the third protrusions are distributed in two vertical rows on the inner cylinder, and the circumferential distance between the two rows of third protrusions is equal to the circumferential distance between two adjacent scrapers.

[0012] Furthermore, it also includes baffles; a plurality of baffles are fixedly connected in each sliding groove on the outer cylinder, and the baffles are made of elastic plates.

[0013] Furthermore, a scraping portion for removing the surface tension of the coal is provided on the rear side of each connecting plate.

[0014] Furthermore, each connecting plate is provided with a plurality of rectangular grooves.

[0015] The beneficial effects are as follows: the present invention realizes that the scraped coal pile is scraped by the raised part of the scraper, so that the scraped coal becomes soft, and then enters the storage cavity in the inner cylinder along the outer material opening and the inner material opening under the action of gravity, so that the storage cavity is gradually filled with coal, and the coal is prevented from being too compacted after being squeezed by the outer cylinder, which makes it difficult for the coal to fall into the storage cavity, thereby affecting the sampling of the coal by the device;

[0016] The third protrusion squeezes all the scrapers, so that the scrapers are tilted upward under the squeezing of the third protrusion and maintain this state, so that when the outer cylinder is pulled out of the coal pile, the tilted part of the scraper scrapes the coal along the pulling path, making the coal soft, reducing the squeezing force of the coal on the outer cylinder, and facilitating the staff to pull the outer cylinder out of the coal pile;

[0017] By making the scraper scratch the coal while performing alternating rotational motion, the surface tension of the coal is destroyed, thereby avoiding the formation of tension at the outer material port and the inner material port when the coal is poured out from the storage chamber, making it difficult for the coal to fall downward from the outer material port and the inner material port, thereby facilitating the staff to pour out the coal in the storage chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1A schematic diagram of the three-dimensional structure of a sampling device for coal resource exploitation of the present invention;

[0019] Figure 2 This is a first exploded view of the outer cylinder and the inner cylinder of the present invention, wherein the outer cylinder and the inner cylinder are cross-sectionally processed;

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the outer cylinder and the scraper assembly of the present invention;

[0021] Figure 4 For the present invention Figure 2 A magnified image of the area in the middle;

[0022] Figure 5 This is a second exploded view of the outer cylinder and the inner cylinder of the present invention, wherein the outer cylinder and the inner cylinder are cross-sectionally processed;

[0023] Figure 6 It is a schematic diagram of the positional relationship between the first protrusion, the second protrusion and the scraper of the present invention;

[0024] Figure 7 It is a schematic diagram of the positional relationship between the second protrusion and the extrusion portion of the outer cylinder of the present invention;

[0025] Figure 8 It is a schematic diagram of the combined three-dimensional structure of the scraper and the connecting plate of the present invention;

[0026] Fig. 9 This is a top view of the outer cylinder, scraper and connecting plate assembly of the present invention, in which the outer cylinder is cross-sectionally processed.

[0027] The names and serial numbers of the parts in the figure are: 1-outer cylinder, 1001-outer material port, 1002-sliding groove, 1003-extrusion part, 2-inner cylinder, 2001-inner material port, 2002-edge part, 3-first protrusion, 4-second protrusion, 5-scraper, 5001-semicircular groove, 6-connecting plate, 6001-inclined surface, 6002-scraping part, 6003-rectangular groove, 101-first handle, 102-second handle, 201-third protrusion, 202-baffle. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0029] Example 1

[0030] like Figure 1-Figure 7As shown, a sampling device for coal resource exploitation includes an outer cylinder 1 and an inner cylinder 2; the inner cylinder 2 is connected to the outer cylinder 1, and the inner cylinder 2 is made of elastic metal material; a plurality of outer material ports 1001 are provided on the outer cylinder 1; a plurality of sliding grooves 1002 are provided in the outer cylinder 1; each outer material port 1001 on the outer cylinder 1 is provided with four extrusion parts 1003 distributed in a rectangular array; a plurality of inner material ports 2001 are provided on the inner cylinder 2; each inner material port 2001 corresponds to an adjacent outer material port 1001 one-to-one; a plurality of storage cavities are provided in the inner cylinder 2, and each storage cavity is connected to and corresponds to an adjacent outer material port 1001 one-to-one; each inner material port 2001 on the inner cylinder 2 is provided with an edge part 2002;

[0031] It also includes a first protrusion 3, a second protrusion 4, a scraper 5 and a connecting plate 6; each inner material port 2001 on the inner cylinder 2 is connected to a centrally symmetrical first protrusion 3; each inner material port 2001 on the inner cylinder 2 is connected to two centrally symmetrical second protrusions 4; each first protrusion 3 and second protrusion 4 are located in adjacent sliding grooves 1002; each outer material port 1001 on the outer cylinder 1 is connected to two left-right symmetrical scrapers 5, and the scrapers 5 are made of deformable plates; each two adjacent scrapers 5 are fixedly connected to a connecting plate 6 on the facing sides; each two adjacent connecting plates 6 are provided with an inclined surface 6001 on the facing sides.

[0032] It also includes a first handle 101 and a second handle 102 ; the first handle 101 is fixedly connected to the upper side of the outer tube 1 ; the second handle 102 is fixedly connected to the upper side of the inner tube 2 .

[0033] First, the staff member holds the outer cylinder 1 with one hand and the first handle 101 with the other hand, and then forcibly inserts the outer cylinder 1 obliquely into the coal pile with the outer material port 1001 facing upward, and gradually pushes the outer cylinder 1 into the depth of the coal pile, so that the inner cylinder 2 follows the outer cylinder 1 into the depth of the coal pile, thereby completing the preparation work for coal sampling.

[0034] Then, the staff member holds the second handle 102, and with the upper view as the reference, rotates the second handle 102 counterclockwise by 180 degrees, thereby driving the inner tube 2 and the inner material port 2001 to rotate counterclockwise by 180 degrees, and then driving the first protrusion 3 and the second protrusion 4 to rotate along the sliding groove 1002 in the same manner, so that the inner material port 2001 gradually coincides with the position of the outer material port 1001 (the inner material port 2001 does not coincide with the outer material port 1001 in the initial state, and the inner material port 2001 initially coincides with the outer material port 1001). The initial position is directly opposite to the outer material port 1001), so that the coal enters the storage cavity in the inner cylinder 2 along the outer material port 1001 and the inner material port 2001 under the action of gravity. However, during the process of inserting the outer cylinder 1 into the coal pile, the coal in contact with the cylinder wall of the outer cylinder 1 is pressed by the outer cylinder 1, making it difficult for the coal to fall into the storage cavity in the inner cylinder 2 under the action of gravity. Therefore, the amount of coal falling into the storage cavity is small, and it is difficult to meet the quantity requirement for coal sampling. Therefore, in the above-mentioned first protrusion 3 and During the rotation of the second protrusion 4, the first protrusion 3 will squeeze the scraper 5, causing the scraper 5 to deform and tilt up, thereby driving the connecting plate 6 to tilt up together, so that the outer side of the scraper 5 protrudes from the outer cylinder 1 wall of the outer cylinder 1, so that the tilted part of the scraper 5 is inserted into the coal pile. Then, the staff holds the first handle 101 with both hands to make the first handle 101 perform alternating rotational motion (a form of motion in which an object periodically changes its rotation direction), thereby driving the outer cylinder 1 and the inner cylinder 2 to perform alternating rotational motion, and then driving the first protrusion 3, the second protrusion 4 and the scraper 5 to perform alternating rotational motion, so that the tilted part of the scraper 5 scratches the coal pile, making the scratched coal soft, and then under the action of gravity, along the outer material port 1001 and the inner material port 2001 into the storage cavity in the inner cylinder 2, so that the storage cavity is gradually filled with coal, thereby realizing the sampling of the coal, and avoiding the coal being too tight after being squeezed by the outer cylinder 1, which makes it difficult for the coal to fall into the storage cavity, thereby affecting the sampling of the coal by the device.

[0035] Subsequently, after the coal sampling is completed, in order to prevent the outer material port 1001 and the inner material port 2001 located at the deepest part of the coal pile from moving to the outside of the coal pile during the process of the outer cylinder 1 being pulled out of the coal pile, the coal in the middle and shallow layers of the coal pile will enter the corresponding storage chamber along the outer material port 1001 and the inner material port 2001, thereby contaminating the coal samples in the storage chamber and affecting the subsequent detection of the coal samples, the storage chamber needs to be sealed before the outer cylinder 1 is pulled out of the coal pile. Therefore, after the coal sampling is completed, the staff holds the second handle 102, and based on the view from top to bottom, the second handle 102 is rotated 180 degrees counterclockwise, thereby driving the inner cylinder 2 and the inner material port 2001 to rotate counterclockwise. The inner material port 2001 is rotated 180 degrees to rotate to the initial position, so that the outer material port 1001 and the inner material port 2001 are misaligned, thereby achieving the closure of the storage chamber. However, in this process, if there are coal blocks on the outer material port 1001 and the inner material port 2001, the outer material port 1001 and the inner material port 2001 are easily stuck by the coal blocks, making it impossible for the inner cylinder 2 to rotate, thereby making it impossible to misalign the outer material port 1001 and the inner material port 2001, and further making it impossible to close the storage chamber. Therefore, before the inner cylinder 2 is rotated 180 degrees counterclockwise, the staff holds the second handle 102, and rotates the second handle 102 clockwise based on the view from top to bottom, thereby driving the first protrusion 3 and the second protrusion 4 to rotate clockwise, such as Figure 7As shown, when the second protrusion 4 rotates to the extrusion portion 1003, the second protrusion 4 will be squeezed by the extrusion portion 1003, so that the second protrusion 4 squeezes the edge portion 2002 of the inner cylinder 2, so that the edge portion 2002 is deformed after being squeezed and concave inwardly. At the same time, the first protrusion 3 gradually enters the sliding groove 1002 after rotating, so that the scraper 5 is separated from the squeezing of the first protrusion 3, and gradually returns to its original state, thereby driving the connecting plate 6 to gradually return to its original state. Subsequently, based on the view from top to bottom, the staff rotates the second handle 102 counterclockwise, thereby driving the inner cylinder 2 to rotate counterclockwise, and then drives the first protrusion 3 and the second protrusion 4 to rotate in the same way, so that the second protrusion 4 is away from the squeezing portion 1003, so that the second protrusion 4 is separated from the squeezing of the squeezing portion 1003, and the second protrusion 4 quickly returns to its original state, thereby making the edge portion 2 002 quickly returns to its original state, so that the edge portion 2002 pushes the coal blocks stuck on the outer material port 1001 and the inner material port 2001 during the process of returning to its original state. At the same time, the first protrusion 3 will also quickly squeeze the scraper 5 again, so that the scraper 5 and the connecting plate 6 quickly become a tilted state, thereby prying the coal blocks stuck on the outer material port 1001 and the inner material port 2001 through the inclined surface 6001 on the quickly tilted connecting plate 6, so that the above-mentioned coal blocks move to the outside of the outer material port 1001, and repeat the above-mentioned operation many times until the coal blocks are no longer stuck on the outer material port 1001 and the inner material port 2001, thereby realizing the processing of the coal blocks stuck on the outer material port 1001 and the inner material port 2001, avoiding the coal blocks stuck on the outer material port 1001 and the inner material port 2001 hindering the rotation of the inner tube 2, resulting in the inability to close the storage cavity, affecting the subsequent coal detection results.

[0036] Then, after closing the storage chamber, the staff holds the first handle 101 with hand and forcibly pulls the outer cylinder 1 out of the coal pile, thereby driving the inner cylinder 2 to move out of the coal pile. Then, based on the view from top to bottom, the staff rotates the inner cylinder 2 180 degrees to make the outer material port 1001 and the inner material port 2001 coincide with each other, and then pours the coal in the storage chamber along the outer material port 1001 and the inner material port 2001, thereby realizing stratified sampling of the coal.

[0037] like Figure 6As shown, each first protrusion 3 protrudes from the adjacent inner material port 2001; each second protrusion 4 protrudes from the adjacent inner material port 2001; in the process of closing the storage chamber, if the coal blocks on the outer material port 1001 and the inner material port 2001 have never been stuck in the outer material port 1001 and the inner material port 2001, but only exist at the outer material port 1001 and the inner material port 2001, at this time, when the inner cylinder 2 rotates, after the edge portion 2002 contacts the above-mentioned coal blocks, the edge portion 2002 will drive the above-mentioned coal blocks to rotate together, and then, when the above-mentioned coal blocks move to contact the scraper 5 on the other side, the coal blocks will be stuck between the scraper 5 and the edge portion 2002, so that the inner cylinder 2 is stuck by the coal blocks. Therefore, before the edge portion 2002 contacts the coal blocks, the inner cylinder 2 is blocked by the coal blocks. A bump 3 and a second bump 4 first contact with the coal block, so that the above-mentioned coal block is stuck between the scraper 5 and the edge 2002, and the coal block becomes stuck between the first bump 3 and the second bump 4 and the scraper 5. At this time, the staff continues to rotate the inner tube 2, and the first bump 3 and the second bump 4 will also continue to rotate, thereby squeezing the coal block through the first bump 3 and the second bump 4, so that the coal block moves toward the outside of the outer tube 1 along the semicircular arc surface on the first bump 3 and the second bump 4 under squeezing, so that the coal block is separated from the position between the first bump 3 and the second bump 4 and the scraper 5, thereby realizing the processing of the above-mentioned coal block, avoiding the outer material port 1001 and the inner material port 2001 from being stuck by the above-mentioned coal block, resulting in the storage cavity being unable to be closed, affecting the subsequent coal detection accuracy.

[0038] Each first bump 3 is configured to be hemispherical; each second bump 4 is configured to be hemispherical; when the first bump 3 repeatedly squeezes the scraper 5, the first bump 3 is easier to squeeze the scraper 5, avoiding the edge of the scraper 5 from getting stuck on the first bump 3, making the alternating rotation movement of the device smoother; when the second bump 4 is squeezed by the squeezing portion 1003, the second bump 4 is easier to enter and exit the squeezing portion 1003, avoiding the edge of the squeezing portion 1003 from getting stuck on the second bump 4, making the alternating rotation movement of the device smoother.

[0039] A plurality of semicircular grooves 5001 are formed on each scraper 5, which are used to increase the surface roughness of the raised portion of the scraper 5, increase the friction force of the raised portion of the scraper 5, and thus improve the scraping effect of the scraper 5 on the coal.

[0040] Each inner material opening 2001 is arranged to be inclined from the upper left to the lower right; Figure 6 As shown, the first protrusion 3 and the second protrusion 4 are distributed obliquely along the inner material opening 2001. When the inner cylinder 2 rotates to close the storage cavity, the first protrusion 3 and the second protrusion 4 apply an oblique shear force to the coal block, thereby increasing the squeezing force of the first protrusion 3 and the second protrusion 4 on the coal block, making it easier for the coal block to move toward the outside of the outer cylinder 1 under the squeezing of the first protrusion 3 and the second protrusion 4, thereby improving the squeezing effect of the first protrusion 3 and the second protrusion 4 on the coal block.

[0041] Example 2

[0042] On the basis of Example 1, Figure 5-Figure 7 As shown, a third protrusion 201 is also included; a third protrusion 201 symmetrically connected to the left side of the inner cylinder 2 is fixed; each third protrusion 201 slides in the sliding groove 1002; the third protrusions 201 are distributed in two vertical rows on the inner cylinder 2, and the circumferential distance between the two rows of third protrusions 201 is equal to the circumferential distance between two adjacent scrapers 5.

[0043] When the staff member pulls the outer cylinder 1 out of the coal pile, the outer cylinder 1 is pressed by the coal because of the coal pile squeezing the outer cylinder 1, which makes it very laborious to pull out the outer cylinder 1. Therefore, before the outer cylinder 1 is pulled out, when the storage cavity is closed, the staff member rotates the second handle 102 counterclockwise by 90 degrees, thereby driving the first protrusion 3, the second protrusion 4 and the third protrusion 201 to rotate counterclockwise by 90 degrees to achieve the closure of the storage cavity. In the process of the rotation of the third protrusion 201, the third protrusions 201 in each row are respectively squeezed. The corresponding scraper 5 is pressed, so that the scraper 5 is tilted upward under the pressure of the third protrusion 201 and maintains this state. Subsequently, the staff holds the first handle 101 and makes the first handle 101 rotate alternately, thereby driving the outer cylinder 1, the inner cylinder 2, the third protrusion 201 and the scraper 5 to rotate alternately synchronously, and in this process, the outer cylinder 1 is gradually pulled out of the coal pile, so that the tilted part of the scraper 5 scratches the coal along the pulling-out path, making the coal soft, reducing the squeezing force of the coal on the outer cylinder 1, and facilitating the staff to pull the outer cylinder 1 out of the coal pile.

[0044] It also includes a baffle 202; each sliding groove 1002 on the outer cylinder 1 is fixed with two left-right symmetrical baffles 202, and the baffles 202 are made of elastic plates; the baffles 202 block the coal to prevent the coal from entering the sliding groove 1002 after the edge 2002 is deformed, resulting in the first protrusion 3 and the second protrusion 4 being blocked by the coal in the sliding groove 1002 during the rotation of the inner cylinder 2, resulting in the first protrusion 3 and the second protrusion 4 being stuck by the coal in the sliding groove 1002, making it impossible for the inner cylinder 2 to rotate, resulting in the inability to close the storage cavity, affecting the subsequent detection accuracy of the coal.

[0045] Example 3

[0046] On the basis of Examples 1 and 2, Figure 1 , Figure 8 and Fig. 9 As shown, a scraping portion 6002 is provided on the rear side of each connecting plate 6 .

[0047] In the process of pouring out the coal in the storage chamber, after the storage chamber is filled with coal, when the coal is poured out from the outer material port 1001 and the inner material port 2001, the coal will squeeze each other, resulting in tension of the coal at the outer material port 1001 and the inner material port 2001, making it difficult for the coal in the storage chamber to be poured out from the outer material port 1001 and the inner material port 2001. Therefore, when pouring out the coal in the storage chamber, the staff holds the first handle 101 by hand to make the first handle 101 perform alternate rotational motion, thereby making the outer cylinder 1, the connecting plate 6 and the scraper 6002 perform alternate rotational motion, such as Fig. 9 As shown, since the scraping part 6002 is located on the inner side of the outer cylinder 1 and is closer to the center of the outer cylinder 1 than the inner wall of the outer cylinder 1, the scraping part 6002 will scratch the coal at the inner material port 2001 when performing alternating rotational motion, thereby destroying the surface tension of the coal, avoiding the formation of tension at the outer material port 1001 and the inner material port 2001 when the coal is poured out of the storage chamber, making it difficult for the coal to fall downward from the outer material port 1001 and the inner material port 2001, thereby facilitating the staff to pour out the coal in the storage chamber.

[0048] A plurality of rectangular grooves 6003 are formed on each connecting plate 6; the rectangular grooves 6003 increase the surface roughness of the scraping portion 6002 on the connecting plate 6, thereby increasing the friction force of the scraping portion 6002 and further improving the scraping effect of the scraping portion 6002 on the coal.

[0049] It should be understood that the above description is only for exemplary purposes and is not meant to limit the present invention. Those skilled in the art will appreciate that variations of the present invention will be included within the scope of the claims herein.

Claims

1. A sampling device for coal resource exploitation, comprising an outer cylinder (1) and an inner cylinder (2); the outer cylinder (1) is connected to the inner cylinder (2), and the inner cylinder (2) is made of elastic metal material; a plurality of outer material ports (1001) are provided on the outer cylinder (1); a plurality of sliding grooves (1002) are provided in the outer cylinder (1); a plurality of extrusion parts (1003) are provided at each outer material port (1001) on the outer cylinder (1); a plurality of inner material ports (2001) are provided on the inner cylinder (2); each inner material port (2001) corresponds to an adjacent outer material port (1001) in a one-to-one manner; a plurality of storage cavities are provided in the inner cylinder (2), and each storage cavity is connected to and corresponds to an adjacent outer material port (1001); an edge part (2002) is provided at each inner material port (2001) on the inner cylinder (2); the device is characterized in that: It also comprises a first protrusion (3), a second protrusion (4), a scraper (5) and a connecting plate (6); each inner material opening (2001) on the inner cylinder (2) is connected to a plurality of first protrusions (3); each inner material opening (2001) on the inner cylinder (2) is connected to a plurality of second protrusions (4); each first protrusion (3) and second protrusion (4) are located in adjacent sliding grooves (1002); each outer material opening (1001) on the outer cylinder (1) is connected to a plurality of scrapers (5) for scraping coal, and the scrapers (5) are made of deformable plates; each adjacent two scrapers (5) are fixedly connected to a connecting plate (6) for shoveling coal; each adjacent two connecting plates (6) are provided with an inclined surface (6001); It also includes a first handle (101) and a second handle (102); the first handle (101) is fixedly connected to the upper side of the outer tube (1); and the second handle (102) is fixedly connected to the upper side of the inner tube (2); It also includes a third protrusion (201); the inner cylinder (2) is fixedly connected to a plurality of third protrusions (201); each third protrusion (201) is located in the sliding groove (1002) and slides; the third protrusions (201) are distributed in two vertical rows on the inner cylinder (2), and the circumferential distance between the two rows of third protrusions (201) is equal to the circumferential distance between two adjacent scrapers (5); Each connecting plate (6) is provided with a scraping portion (6002) on the rear side for removing the surface tension of the coal; Each connecting plate (6) is provided with a plurality of rectangular grooves (6003).

2. A sampling device for coal resource exploitation according to claim 1, characterized in that: Each first protrusion (3) protrudes from an adjacent inner material opening (2001); and each second protrusion (4) protrudes from an adjacent inner material opening (2001).

3. A sampling device for coal resource exploitation according to claim 2, characterized in that: Each first convex block (3) is configured to be hemispherical; and each second convex block (4) is configured to be hemispherical.

4. A sampling device for coal resource exploitation according to claim 1, characterized in that: Each scraper (5) is provided with a plurality of semicircular grooves (5001).

5. A sampling device for coal resource exploitation according to claim 2, characterized in that: Each inner material opening (2001) is arranged at an inclination.

6. A sampling device for coal resource exploitation according to claim 1, characterized in that: It also includes baffles (202); a plurality of baffles (202) are fixedly connected in each sliding groove (1002) on the outer cylinder (1), and the baffles (202) are made of elastic plates.

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