A safe and convenient sampling device for coal falling flow sampling

Abstract

The utility model discloses a kind of for coal flow sampling safety convenient sampling device, it is related to coal flow sampling device technical field, including walking frame, its bottom opposite side is all with walking wheel;Two support frames, two support frames bottom one one correspondence fixed in walking frame top opposite side;Two support frames are limited to avoid passage between;Two guide rails, two guide rails are all along the length direction of avoiding passage arrangement and its outer circumferential wall one one correspondence fixed in two support frame top;Sampling bucket, between two guide rails;Sampling bucket top corresponding two ends of two guide rails are movably erected on corresponding guide rail;Handle, fixed in the length direction of guide rail one end;Support frame is close to the other end of the length direction of guide rail;Driving mechanism, the driving end transmission connection sampling bucket of driving mechanism, sampling bucket can be driven along the length direction of guide rail sliding and passing through avoiding passage.The utility model can safely, efficiently, conveniently carry out coal flow sampling.

Description

Technical Field

[0001] This utility model relates to the technical field of coal flow sampling devices, and in particular to a safe and convenient sampling device for coal flow sampling. Background Technology

[0002] In coal sampling operations, when sampling coal flows according to the GB475-2008 standard, sampling hoppers or shovels are commonly used as sampling tools. In practice, sampling personnel must manually insert these tools into the coal flow, which has significant drawbacks. Firstly, the large volume, high speed, and strong impact of the coal flow require considerable physical exertion from the sampling personnel to insert the tools, leading to fatigue and increasing the risk of accidents. Secondly, if the sampling personnel do not hold the tool securely, the sampling hopper can easily fall into the unloading equipment under the impact of the coal flow, causing equipment damage, economic losses, and disrupting normal production processes.

[0003] Therefore, how to provide a safe and convenient sampling device for coal flow sampling, which can safely, efficiently and conveniently perform coal flow sampling, is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the present invention proposes a safe and convenient sampling device for coal flow sampling, aiming to solve the technical problems of poor safety, inconvenience and inefficiency of the above-mentioned traditional sampling tools when sampling coal flow.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model provides a safe and convenient sampling device for coal flow sampling, comprising:

[0007] The walking frame has wheels on both opposite sides of its bottom;

[0008] Two support frames are fixed at their bottoms on opposite sides of the top of the traveling frame; a clearance passage is defined between the two support frames.

[0009] Two guide rails are provided, both of which are arranged along the length of the clearance channel and their outer peripheral walls are fixed to the top of the two support frames respectively.

[0010] The sampling bucket is located between the two guide rails; the top of the sampling bucket is movably mounted on the corresponding guide rails at both ends.

[0011] A handle is fixed at one end along the length of the guide rail; the support frame is located near the other end along the length of the guide rail.

[0012] A driving mechanism, the driving end of which is connected to the sampling bucket, is capable of driving the sampling bucket to slide along the length of the guide rail and pass through the clearance channel.

[0013] This utility model discloses a safe and convenient sampling device for coal flow sampling. When in use, the sampling personnel hold the handle to drive the wheels to rotate, thereby controlling the overall movement of the sampling device. Before sampling, the sampling bucket is driven to move backward and close to the handle by the drive mechanism, and the handle is pushed so that the front ends of the two guide rails are inserted into the coal flow area along the width or thickness direction of the coal flow, so that the falling coal flow passes through the area between the two guide rails. Then, the sampling bucket is driven forward at a constant speed by the drive mechanism to intercept the coal flow and obtain a subsample. The sampling bucket is controlled by the handle to leave the coal flow area, and then the sampling bucket is driven backward by the drive mechanism to move close to the handle, so that the sampling bucket can be easily removed from the guide rails for sample unloading. When using this sampling device to sample coal flow, the sampling personnel are kept away from the coal flow area, ensuring their safety. Because the support frame is positioned near the other end of the guide rail along its length, using the wheels as a fulcrum and lever principles, the sampling personnel can control the handle more easily, flexibly, quickly, and efficiently, effectively avoiding the impact of the coal flow's impact on them. The sampling hopper is moved by a drive mechanism for sampling, allowing for more precise speed control and enabling the collection of more representative coal flow samples compared to manual sampling. This ensures that the sampling hopper does not overflow, improving sampling accuracy.

[0014] As a further improvement to the above technical solution, the walking frame includes a base and a lifting platform; walking wheels are installed on both opposite sides of the base; the lifting platform is fixedly installed on the top of the base; the bottoms of the two support frames are fixed one-to-one on opposite sides of the top of the lifting platform; the relative directions of the two support frames are the same as the relative directions of the two walking wheels.

[0015] The beneficial effects of the above technical solution are: the lifting platform can flexibly adjust the sampling height, adapt to coal flow drop areas of different heights, and always keep the sampling bucket moving horizontally for sampling, thus ensuring the reliability of sampling.

[0016] As a further improvement to the above technical solution, the sampling bucket includes a bucket body and two sliding plates; the two sliding plates are symmetrically fixed to the top of opposite sides of the bucket body; the bucket body is located between two guide rails, and the two sliding plates are adapted to slide and overlap the upper ends of the two guide rails one-to-one.

[0017] The beneficial effects of the above technical solution are: the bucket body is connected to the upper end of the guide rail by the sliding plate, the structure is stable, the bucket body can effectively bear the sampling impact force, and after the sampling is completed, the sliding plate and the guide rail can be easily separated, and then the bucket body can be removed for sample unloading.

[0018] As a further improvement to the above technical solution, handles are installed on both sides of the bucket body along the length of the guide rail.

[0019] The beneficial effect of the above technical solution is that it makes it more convenient to remove the bucket by pulling the handle.

[0020] As a further improvement to the above technical solution, the bottom of the bucket is provided with a discharge gate.

[0021] The beneficial effects of the above technical solution are: opening the unloading door makes it easier to unload samples from the bottom of the hopper without having to laboriously tilt the hopper, and it can also suppress dust.

[0022] As a further improvement to the above technical solution, the driving mechanism includes a first sprocket, a second sprocket, a ring chain, and a sprocket driver; the first sprocket is connected to one end of the guide rail along its length, and the second sprocket is connected to the other end of the guide rail along its length; the ring chain passes through the clearance channel and is adapted to be driven and connected to the first sprocket and the second sprocket; the ring chain is detachably connected to the sampling hopper; the sprocket driver is driven and connected to the first sprocket to drive its rotation.

[0023] The beneficial effects of the above technical solution are: the sprocket driver can flexibly and conveniently drive the sprocket to rotate in both directions, the rotating sprocket drives the ring chain to rotate, and the rotating ring chain can drive the sampling bucket to slide forward or backward along the guide rail; when extracting the sampling bucket, the sampling bucket and the ring chain can be separated first.

[0024] As a further improvement to the above technical solution, the sprocket driver is a crank or a drive motor capable of driving the sprocket to rotate.

[0025] The beneficial effects of the above technical solution are: the use of a crank handle in the sprocket drive can reduce manufacturing costs; the use of a drive motor in the sprocket drive can improve the sampling operation effect and enhance the convenience of sampling control.

[0026] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a safe and convenient sampling device for coal flow sampling, which has the following advantages and beneficial effects:

[0027] 1. This utility model enables sampling personnel to stay away from the coal flow area, ensuring personnel safety; and by utilizing the lever principle, it makes the operation of the sampling personnel less strenuous, improving the control accuracy and stability of the sampling hopper.

[0028] 2. This utility model uses a drive mechanism to drive the sampling bucket for moving sampling. By reasonably controlling the moving speed of the sampling bucket, it can capture coal flow samples that are more representative than manual sampling, thus improving the accuracy of sampling.

[0029] 3. The top two sides of the sampling hopper of this utility model are attached to the guide rail, which can effectively resist the impact of the coal flow, have good stability, and make it easy to remove the sampling hopper from the guide rail to extract coal samples; opening the unloading door at the bottom of the sampling hopper can facilitate easy and labor-saving unloading of samples. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0031] Figure 1 This utility model presents a three-dimensional structural schematic diagram of a safe and convenient sampling device for coal flow sampling.

[0032] Figure 2 This utility model discloses a schematic diagram of the sampling bucket structure of a safe and convenient sampling device for coal flow sampling;

[0033] Figure 3 This utility model discloses a safe and convenient sampling device for coal flow sampling, showing the sampling bucket moved to the sampling position;

[0034] Figure 4 This utility model discloses a safe and convenient sampling device for coal flow sampling, showing the sampling bucket moving to the unloading position;

[0035] Figure 5 This utility model discloses a schematic diagram of the anti-tilting hook body installation state of a safe and convenient sampling device for coal flow sampling.

[0036] In the diagram: 1. Walking frame; 11. Base; 111. Walking wheel; 12. Lifting platform; 2. Support frame; 21. Clearance passage; 3. Guide rail; 4. Sampling hopper; 41. Hopper body; 411. Unloading gate; 42. Sliding plate; 43. Handle; 44. Hook; 5. Handle; 6. Drive mechanism; 61. Sprocket 1; 62. Sprocket 2; 63. Ring chain; 64. Sprocket driver; 65. Drive shaft; 7. Stabilizer; 71. Anti-tilt hook; 8. Conveyor belt. Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0038] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] According to the embodiments of this utility model, such as Figures 1 to 5 As shown, a safe and convenient sampling device for coal flow sampling includes a walking frame 1, two support frames 2, two guide rails 3, a sampling hopper 4, a handle 5, and a drive mechanism 6.

[0042] The bottom of the walking frame 1 has walking wheels 111 on both opposite sides;

[0043] The bottoms of the two support frames 2 are fixed to the opposite sides of the top of the traveling frame 1; an obstacle clearance 21 is defined between the two support frames 2;

[0044] Both guide rails 3 are arranged along the length of the clearance channel 21 and their outer peripheral walls are fixed to the top of the two support frames 2 respectively.

[0045] The sampling bucket 4 is located between two guide rails 3; the top of the sampling bucket 4 is movably mounted on the corresponding guide rails 3 at both ends of the two guide rails 3.

[0046] Handle 5 is fixed at one end of the guide rail 3 along its length; support frame 2 is located near the other end of the guide rail 3 along its length.

[0047] The drive end of the drive mechanism 6 is connected to the sampling bucket 4, which can drive the sampling bucket 4 to slide along the length of the guide rail 3 and pass through the avoidance channel 21.

[0048] In this embodiment, a safe and convenient sampling device for coal flow sampling is used. When the sampling personnel hold the handle 5, they can drive the walking wheels 111 to rotate, thereby controlling the overall movement of the sampling device. Before sampling, the sampling bucket 4 is driven to move backward and close to the handle 5 by the drive mechanism 6, and the handle 5 is pushed so that the front ends of the two guide rails 3 are inserted into the coal flow area along the width or thickness direction of the coal flow, so that the falling coal flow passes through the area between the two guide rails 3. Then, the sampling bucket 4 is driven to move forward at a constant speed by the drive mechanism 6 to intercept the coal flow and obtain a subsample. The sampling bucket 4 is controlled to leave the coal flow area by the handle 5, and then the sampling bucket 4 is driven to move backward and close to the handle 5 by the drive mechanism 6, so that the sampling bucket 4 can be easily removed from the guide rails 3 for sample unloading. When using this sampling device to sample coal flow, the sampling personnel are kept away from the coal flow area, ensuring their safety. Because the support frame 2 is located near the other end of the guide rail 3 along its length, and the walking wheel 111 serves as the fulcrum, the lever principle makes it easier, more flexible, faster, and more efficient for the sampling personnel to control the handle 5, effectively avoiding the impact of the coal flow impact on the sampling personnel. The sampling bucket 4 is driven by the drive mechanism 6 to move for sampling, and the speed control is more precise, enabling the capture of coal flow samples that are more representative than manual sampling, thus improving the accuracy of the sampling.

[0049] Specifically, handle 5 is vertically welded and fixed to the ends of the two guide rails 3.

[0050] In some embodiments, the walking frame 1 includes a base 11 and a lifting platform 12; walking wheels 111 are installed on both opposite sides of the base 11; the lifting platform 12 is fixedly installed on the top of the base 11; the bottoms of two support frames 2 are fixedly fixed on opposite sides of the top of the lifting platform 12; the relative directions of the two support frames 2 are the same as the relative directions of the two walking wheels 111.

[0051] The lifting platform 12 allows for flexible adjustment of the sampling height, adapting to different coal flow drop areas and ensuring the sampling bucket 4 remains horizontal during sampling, thus guaranteeing sampling reliability.

[0052] Specifically, the base 11 is a rectangular frame, which can be welded from 4cm×4cm square tubing to reduce its weight. The wheels 111 have a diameter of 40-60cm and are symmetrically installed on the left and right sides of the base 11 via axles. The lifting platform 12 can be a scissor lift platform, using existing products or manufactured based on existing technology. The support frame 2 is a rectangular planar frame welded from 4cm×4cm square tubing. The bottom ends of two support frames 2 are vertically fixed to opposite sides of the top surface of the lifting platform 12; the two support frames 2 are horizontally opposite and spaced apart to form a horizontal clearance passage 21 between them. The guide rails 3 are made of round or square steel tubing. Both guide rails 3 are parallel to the top surface of the lifting platform 12 and arranged horizontally opposite each other. The two guide rails 3 are welded and fixed to the top of the two support frames 2.

[0053] Specifically, it also includes a stabilizer 7, which is welded and fixed to the bottom of each of the two support frames 2 corresponding to the guide rails 3; the top of the stabilizer 7 is welded and fixed to the bottom of the corresponding guide rail 3 for support, so that the longer guide rail 3 is stable and does not bend or wobble. The stabilizer 7 can be a support rod or a planar support frame; the stabilizer 7 can be made by welding steel pipes.

[0054] Specifically, the total length of the guide rail 3 can be designed according to the actual use scenario. The distance from the rear end of the guide rail 3 (the end where the handle is installed) to the support frame 2 is 2-3 times the distance from the front end of the guide rail 3 to the support frame 2.

[0055] In some embodiments, the sampling bucket 4 includes a bucket body 41 and two sliding plates 42; the two sliding plates 42 are symmetrically fixed on the top of opposite sides of the bucket body 41; the bucket body 41 is located between two guide rails 3, and the two sliding plates 42 are adapted to slide and overlap the upper ends of the two guide rails 3 in a one-to-one correspondence.

[0056] The bucket body 41 is attached to the upper end of the guide rail 3 by the sliding plate 42, which makes the structure stable. The bucket body 41 can effectively bear the sampling impact force. After sampling, the sliding plate 42 and the guide rail 3 can be easily separated, and then the bucket body 41 can be removed for sample unloading.

[0057] Specifically, both sliding plates 42 are curved strips that can be adapted to and movably overlap the upper end of the corresponding guide rail 3. Lubricating grease is periodically applied between the contact surfaces of the sliding plates 42 and the guide rail 3 to increase the smoothness of sliding.

[0058] In some embodiments, handles 43 are fixedly welded to both sides of the bucket body 41 along the length of the guide rail 3.

[0059] The bucket body 41 can be removed by holding and pulling the two handles 43 with both hands, making the operation more convenient; when the bucket body 41 is large and heavy, it can be carried by two people.

[0060] In some embodiments, a discharge door 411 is provided at the bottom of the hopper 41. Opening the discharge door 411 makes it easier to discharge samples from the bottom of the hopper 41 without having to laboriously tilt the hopper 41, and also helps to suppress dust.

[0061] Specifically, the bucket body 41 is made of welded steel plates, and the sliding plate 42 is integrally connected or welded to the top of the bucket body 41. The bottom of the bucket body 41 is open, and slots are provided around the opening. The unloading gate 411 is a steel insert plate that can slide into the slot at the bottom of the bucket body 41 to close the bottom opening. Samples can be unloaded through the open bottom of the bucket body 41 by inserting or removing the unloading gate 411.

[0062] In some embodiments, the drive mechanism 6 includes a first sprocket 61, a second sprocket 62, an annular chain 63, and a sprocket driver 64; the first sprocket 61 is connected to one end of the guide rail 3 along its length, and the second sprocket 62 is connected to the other end of the guide rail 3 along its length; the annular chain 63 passes through the clearance channel 21 and is adapted to be connected and driven to the first sprocket 61 and the second sprocket 62; the annular chain 63 is detachably connected to the sampling hopper 4; the sprocket driver 64 is driven to the first sprocket 61 to drive its rotation.

[0063] The sprocket driver 64 can flexibly and conveniently drive the sprocket 61 to rotate in both directions. The rotating sprocket 61 drives the ring chain 63 to rotate, and the rotating ring chain 63 can drive the sampling bucket 4 to slide forward or backward along the guide rail 3. When extracting the sampling bucket 4, the sampling bucket 4 and the ring chain 63 can be separated first.

[0064] In some embodiments, the stabilizer 7 is a square tube with the same length as the guide rail 3; the stabilizer 7 is welded and fixed below the corresponding guide rail 3 in parallel; there are two sets of drive mechanisms 6, each set corresponding to one of the two stabilizers 7. The sprockets 61 of the two sets of drive mechanisms 6 are rotatably connected to one end of the length direction of the two stabilizers 7 and are both located inside the two stabilizers 7 in opposite directions; the sprockets 62 of the two sets of drive mechanisms 6 are rotatably connected to the other end of the length direction of the two stabilizers 7 and are both located inside the two stabilizers 7 in opposite directions. The two sprockets 61 of the two sets of drive mechanisms 6 are coaxially connected via a drive shaft 65. The two sets of drive mechanisms 6 can share a single sprocket driver 64.

[0065] Specifically, hooks 44 are fixedly installed on both sides of the bucket body 41 corresponding to the two guide rails 3; hanging rings are fixed on the annular chain 63; the hooks 44 on both sides of the bucket body 41 can be detachably hooked onto the hanging rings of the two sets of annular chains 63. When the annular chain 63 is running, the hanging rings drive the hooks 44, thereby driving the sampling bucket 4 to move along the length of the guide rail 3. The sampling bucket 4 can be easily removed by separating the hooks 44 from the hanging rings.

[0066] In some embodiments, the sprocket driver 64 is a crank or drive motor capable of driving the sprocket 61 to rotate.

[0067] The sprocket driver 64 uses a crank handle, which reduces manufacturing costs. The sprocket driver 64 uses a drive motor, which improves sampling efficiency and ease of sampling control. The drive motor is powered by a rechargeable battery, which is mounted on the base 11 and electrically connected to the drive motor via a cable. The drive motor switch can be mounted on the handle 5 for easy operation.

[0068] In some embodiments, in order to improve the stability of the sampling bucket 4 during the sampling process and prevent the sliding plate 42 from detaching from the guide rail 3 and causing the bucket 41 to tip over, an anti-tilting hook 71 is fixed on the outer front part of the stabilizer 7 corresponding to the sampling position of the sampling bucket 4. The upper part of the anti-tilting hook 71 is spaced above the corresponding guide rail 3, and the sliding plate 42 is located below the anti-tilting hook 71 when it slides to the sampling position. The anti-tilting hook 71 plays the role of preventing the sliding plate 42 from moving upward and derailing.

[0069] Specifically, there are multiple anti-tilting hooks 71, which are arranged at intervals along the length of the stabilizer 7 to improve the anti-tilting effect and enhance the resistance of the sampling bucket 4 to coal flow impact. The lower part of each anti-tilting hook 71 is fixedly installed on the outer wall of the stabilizer 7 by bolts.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0071] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A safe and convenient sampling device for coal flow sampling, characterized in that, include: The walking frame (1) has walking wheels (111) on both opposite sides of its bottom; Two support frames (2) are fixed at their bottoms on opposite sides of the top of the walking frame (1); an obstacle clearance (21) is defined between the two support frames (2); Two guide rails (3) are arranged along the length of the clearance channel (21) and their outer peripheral walls are fixed to the top of the two support frames (2) respectively. The sampling bucket (4) is located between the two guide rails (3); the top of the sampling bucket (4) is movably mounted on the corresponding guide rails (3) at both ends of the two guide rails (3); The handle (5) is fixed at one end of the guide rail (3) along its length; the support frame (2) is located near the other end of the guide rail (3) along its length. The driving mechanism (6) is connected to the sampling bucket (4) at its driving end, and can drive the sampling bucket (4) to slide along the length of the guide rail (3) and pass through the avoidance channel (21).

2. The safe and convenient sampling device for coal flow sampling according to claim 1, characterized in that, The walking frame (1) includes a base (11) and a lifting platform (12); walking wheels (111) are installed on both opposite sides of the base (11); the lifting platform (12) is fixedly installed on the top of the base (11); the bottoms of the two support frames (2) are fixed one-to-one on opposite sides of the top of the lifting platform (12); the relative directions of the two support frames (2) are the same as the relative directions of the two walking wheels (111).

3. The safe and convenient sampling device for coal flow sampling according to claim 1, characterized in that, The sampling bucket (4) includes a bucket body (41) and two sliding plates (42); the two sliding plates (42) are symmetrically fixed on the top of opposite sides of the bucket body (41); the bucket body (41) is located between two guide rails (3), and the two sliding plates (42) are adapted to slide and overlap on the upper end of the two guide rails (3) in a one-to-one correspondence.

4. The safe and convenient sampling device for coal flow sampling according to claim 3, characterized in that, Handles (43) are installed on both sides of the bucket body (41) along the length of the guide rail (3).

5. The safe and convenient sampling device for coal flow sampling according to claim 3, characterized in that, The bottom end of the bucket (41) is provided with a discharge gate (411).

6. The safe and convenient sampling device for coal flow sampling according to claim 1, characterized in that, The drive mechanism (6) includes a first sprocket (61), a second sprocket (62), an annular chain (63), and a sprocket driver (64); the first sprocket (61) is connected to one end of the guide rail (3) along its length, and the second sprocket (62) is connected to the other end of the guide rail (3) along its length; the annular chain (63) passes through the clearance channel (21) and is adapted to be connected to the first sprocket (61) and the second sprocket (62); the annular chain (63) is detachably connected to the sampling bucket (4); the sprocket driver (64) is connected to the first sprocket (61) to drive its rotation.

7. A safe and convenient sampling device for coal flow sampling according to claim 6, characterized in that, The sprocket driver (64) is a crank or drive motor capable of driving the sprocket (61) to rotate.

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