Coal powder sampling device for coal powder fineness detection

Abstract

This utility model discloses a coal powder sampling device for detecting the fineness of coal powder. The coal powder sampling device includes a sampling cylinder, an auger, and a cover plate assembly. The sampling cylinder has an internal receiving space, and an inlet is provided on the outer peripheral wall of the sampling cylinder, which communicates with the receiving space. The auger is rotatably disposed within the receiving space for sampling from the inlet into the receiving space. The cover plate assembly is movably disposed on the sampling cylinder for opening or closing the inlet. According to this utility model, the coal powder sampling device avoids changes in the quantity of coal powder samples due to shaking or other reasons during the extraction process from the coal powder environment, and prevents coal powder samples from entering the receiving space or coal powder in the receiving space from flowing out of the inlet after sampling, thus making the coal powder sampling more accurate.

Description

Technical Field

[0001] This utility model mainly relates to the field of coal powder sampling technology, and in particular to a coal powder sampling device for detecting the fineness of coal powder. Background Technology

[0002] Coal powder sampling devices for coal powder fineness testing can collect a certain amount of coal powder samples from coal powder conveying systems such as coal powder pipelines, according to specific requirements and methods. Currently, most sampling devices operate by closing the sampling port only after the sampler has been completely removed from the coal powder. This affects the coal powder already collected inside the sampler, causing instability at the sampling port. Furthermore, as the sampler is gradually removed from the coal powder, coal powder may spill out from the still-open sampling port due to gravity. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a coal powder sampling device for detecting coal powder fineness. This device avoids changes in the quantity of coal powder samples due to shaking or other reasons during the extraction process from the coal powder environment, and prevents coal powder samples from entering the containment space or flowing out of the inlet after sampling, thus making coal powder sampling more accurate.

[0004] A coal powder sampling device for detecting the fineness of coal powder according to an embodiment of the present invention includes a sampling cylinder, an auger, and a cover plate assembly. The sampling cylinder has an internal receiving space, and an inlet is provided on the outer peripheral wall of the sampling cylinder, which communicates with the receiving space. The auger is rotatably disposed in the receiving space and is used to sample from the inlet into the receiving space. The cover plate assembly is movably disposed on the sampling cylinder and is used to open or close the inlet.

[0005] According to an embodiment of the present invention, a coal powder sampling device for detecting the fineness of coal powder includes a cover plate assembly that is movably mounted on the sampling cylinder. This cover plate assembly opens or closes the feed inlet. When the coal powder sampling device is sampling, the cover plate assembly opens the feed inlet, the auger rotates, and the external coal powder enters the receiving space from the feed inlet. After sampling, the auger stops rotating, the cover plate assembly closes the feed inlet, and the coal powder sampling device is removed from the coal powder environment. This prevents changes in the quantity of coal powder samples due to shaking or other reasons during the removal process, and prevents coal powder samples from the coal powder environment from entering the receiving space after sampling or coal powder from flowing out of the receiving space from the feed inlet, thus making the coal powder sampling more accurate.

[0006] In some embodiments of this utility model, the coal powder sampling device further includes a transmission device, which includes a first pull plate, a transmission component, and a scraper. The first pull plate is movable along the axial direction of the sampling cylinder, and the scraper is fixedly connected to the cover plate assembly and rotatable along the circumferential direction of the sampling cylinder. At least a portion of the scraper is in contact with the outer peripheral wall of the sampling cylinder. The transmission component is connected to both the first pull plate and the scraper, and is used to convert the movement of the first pull plate along the axial direction of the sampling cylinder into the rotation of the scraper along the circumferential direction of the sampling cylinder.

[0007] In some embodiments of this utility model, a first groove is provided at one end of the sampling cylinder in the axial direction, and a first guide groove is provided on the peripheral wall of the first groove, extending spirally along the axial direction of the first groove. The transmission component includes a push rod assembly, at least a portion of which extends into the first groove. A first guide rod is provided on the push rod assembly, at least a portion of which is disposed in the first guide groove. The end of the push rod assembly facing away from the bottom wall of the first groove is rotatably connected to the first pull plate. The end of the push rod assembly facing away from the bottom wall of the first groove is fixed relative to the scraper in the axial direction of the sampling cylinder. The push rod assembly and the scraper are movable relative to each other in the axial direction of the sampling cylinder.

[0008] In some embodiments of this utility model, the transmission component further includes an elastic element, one end of which is disposed on the bottom wall of the first groove, and the other end is connected to the push rod assembly, for driving the push rod assembly to move in a direction away from the bottom wall of the first groove.

[0009] In some embodiments of this utility model, the push rod assembly includes: a push block, the outer peripheral wall of which is in contact with the inner peripheral wall of the first groove; a push rod, which is disposed at one end of the push block away from the bottom wall of the first groove, the push rod being in clearance fit with the first groove, and the first guide rod being disposed on the push rod.

[0010] In some embodiments of this utility model, the first guide rod and the first guide groove are in clearance fit.

[0011] In some embodiments of this utility model, the coal powder sampling device further includes: a first support plate, one end of the first support plate in the thickness direction being connected to the end of the sampling cylinder away from the first groove; and a motor, the motor being fixedly connected to the end of the first support plate away from the sampling cylinder, the output end of the motor being fixedly connected to the auger, and the motor being used to drive the auger to rotate.

[0012] In some embodiments of this utility model, the cover plate assembly includes a telescopic rod, which is telescopic along its axial direction, one end of which is fixedly connected to the scraper, and the axial direction of the telescopic rod is perpendicular to the axial direction of the sampling cylinder; a cover plate body, which is disposed at the end of the telescopic rod away from the scraper, and a second groove is provided on the outer peripheral wall of the sampling cylinder where the feed inlet is located, the feed inlet being disposed on the bottom wall of the second groove, the second groove extending along the circumferential direction of the sampling cylinder, the cover plate body being movably disposed within the second groove, and the cover plate body being used to open or close the feed inlet; and a guide plate, which is connected to at least one end of the cover plate body along the axial direction of the sampling cylinder, and a second guide groove is provided at the end of the second groove away from the transmission member, the guide plate being disposed within the second guide groove.

[0013] In some embodiments of this utility model, the second guide groove includes a body section and a feeding section. The feeding section and the feeding port are arranged opposite to each other in the axial direction of the sampling cylinder, and the feeding section is recessed towards the side close to the axis of the sampling cylinder.

[0014] In some embodiments of this utility model, a sealing gasket is provided at one end of the cover plate body near the bottom wall of the second groove.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a cross-sectional view of a coal powder sampling device according to an embodiment of the present utility model;

[0018] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 yes Figure 1 Enlarged view of point B in the middle;

[0020] Figure 4 This is a perspective view of a coal powder sampling device according to an embodiment of the present utility model;

[0021] Figure 5 This is a cross-sectional view of the second groove of the coal powder sampling device according to an embodiment of the present invention.

[0022] Figure label:

[0023] 100. Pulverized coal sampling device;

[0024] 1. Sampling cylinder; 11. Receiving space; 12. Feed inlet; 13. First groove; 131. First guide groove; 14. Second groove; 15. Second guide groove; 151. Body section; 152. Feeding section; 16. Slide groove;

[0025] 2. Screwdriver; 21. Central shaft; 22. Helical body;

[0026] 3. Cover plate assembly; 31. Telescopic rod; 32. Cover plate body; 33. Guide plate;

[0027] 4. Transmission device; 41. First pull plate; 42. Transmission component; 421. Push rod assembly; 4211. Push block; 4212. Push rod; 4213. First guide rod; 422. Elastic element; 43. Scraper;

[0028] 5. First support plate; 51. First handle; 6. Motor; 7. Sealing gasket; 8. Second handle; 81. Slider. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of the 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 are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] The following is for reference. Figures 1-5 This invention describes a coal powder sampling device 100 for detecting the fineness of coal powder according to an embodiment of the present invention.

[0033] like Figure 1 As shown, the coal powder sampling device 100 for coal powder fineness detection according to an embodiment of the present utility model includes a sampling cylinder 1, an auger 2, and a cover plate assembly 3.

[0034] Specifically, such as Figure 1 and Figure 5 As shown, the sampling cylinder 1 has an internal accommodating space 11, and an inlet 12 is provided on the outer peripheral wall of the sampling cylinder 1. The inlet 12 is connected to the accommodating space 11. The auger 2 is rotatably disposed in the accommodating space 11 and is used to take samples from the inlet 12 into the accommodating space 11. The cover plate assembly 3 is movably disposed on the sampling cylinder 1 and is used to open or close the inlet 12.

[0035] When the coal powder sampling device 100 is sampling, the cover plate assembly 3 opens the feed inlet 12, the auger 2 rotates, and drives the external coal powder into the receiving space 11 from the feed inlet 12; after sampling is completed, the auger 2 stops rotating, the cover plate assembly 3 closes the feed inlet 12, and the coal powder sampling device 100 is taken out from inside the coal powder environment. This avoids changes in the number of coal powder samples due to shaking or other reasons during the process of taking the coal powder sampling device 100 out of the coal powder environment, and prevents the coal powder samples in the coal powder environment from entering the receiving space 11 after sampling or the coal powder in the receiving space 11 from flowing out from the feed inlet 12, so that the coal powder sampling is more accurate.

[0036] According to an embodiment of the present invention, a coal powder sampling device 100 for detecting the fineness of coal powder includes a cover plate assembly 3, which is movably mounted on the sampling cylinder 1 to open or close the feed inlet 12. When the coal powder sampling device 100 is sampling, the cover plate assembly 3 opens the feed inlet 12, the auger 2 rotates, and drives the external coal powder from the feed inlet 12 into the receiving space 11. After sampling is completed, the auger 2 stops rotating, the cover plate assembly 3 closes the feed inlet 12, and the coal powder sampling device 100 is removed from the coal powder environment. This avoids changes in the number of coal powder samples due to shaking or other reasons during the removal of the coal powder sampling device 100 from the coal powder environment, and prevents the coal powder samples in the coal powder environment from entering the receiving space 11 after sampling or the coal powder in the receiving space 11 from flowing out of the feed inlet 12, making the coal powder sampling more accurate.

[0037] In this embodiment, as Figure 1 and Figure 5 As shown, the screw conveyor 2 is a screw conveyor, including a central shaft 21 and a screw body 22 (generally a helical blade) disposed on the central shaft 21. When the screw body 22 rotates, the blade moves like a nut on a screw, pushing the coal powder in the receiving space 11 to move axially.

[0038] In some embodiments of this utility model, such as Figure 1 and Figure 3 As shown, the coal powder sampling device 100 also includes a transmission device 4, which includes a first pull plate 41, a transmission component 42, and a scraper 43. The first pull plate 41 is along the axial direction of the sampling cylinder 1 (e.g., Figure 1 The first direction shown is movable. The scraper 43 is fixedly connected to the cover plate assembly 3 and can rotate in the circumferential direction of the sampling cylinder 1. At least a part of the scraper 43 is in contact with the outer peripheral wall of the sampling cylinder 1. The transmission member 42 is connected to both the first pull plate 41 and the scraper 43, and is used to convert the movement of the first pull plate 41 in the axial direction of the sampling cylinder 1 into the rotation of the scraper 43 in the circumferential direction of the sampling cylinder 1.

[0039] Understandably, when the coal powder sampling device 100 is sampling, the user moves the first pull plate 41 along the axial direction of the sampling cylinder 1. The transmission component 42 converts the movement of the first pull plate 41 along the axial direction of the sampling cylinder 1 into the rotation of the scraper 43 along the circumferential direction of the sampling cylinder 1. The scraper 43 drives the cover plate assembly 3 to move, the cover plate assembly 3 opens the feed inlet 12, the auger 2 rotates, and drives the external coal powder into the receiving space 11 from the feed inlet 12. After sampling is completed, the auger 2 stops rotating, and the user moves the first pull plate 41 in the opposite direction along the axial direction of the sampling cylinder 1. 42. The movement of the first pull plate 41 along the axial direction of the sampling cylinder 1 is converted into the rotation of the scraper 43 along the circumferential direction of the sampling cylinder 1. The scraper 43 drives the cover plate assembly 3 to move, and the cover plate assembly 3 closes the feed inlet 12. The coal powder sampling device 100 is taken out from inside the coal powder environment. This avoids the coal powder sample quantity from changing due to shaking or other reasons during the process of taking the coal powder sampling device 100 out of the coal powder environment. It also prevents the coal powder sample in the coal powder environment from entering the containment space 11 after sampling or the coal powder in the containment space 11 from flowing out of the feed inlet 12, making the coal powder sampling more accurate.

[0040] In addition, at least a portion of the scraper 43 is in contact with the outer peripheral wall of the sampling cylinder 1. When the scraper 43 rotates, it can clean the outer peripheral wall of the sampling cylinder 1, reducing the possibility of coal dust being carried out of the coal dust environment and polluting the external environment.

[0041] In some embodiments of this utility model, such as Figure 1 and Figure 3 As shown, a first groove 13 is provided at one end of the sampling cylinder 1 in the axial direction, and the peripheral wall of the first groove 13 is provided with a groove along the axial direction of the first groove 13 (e.g., Figure 1 The first guide groove 131 extends spirally in the first direction shown. The transmission component 42 includes a push rod assembly 421. At least a portion of the push rod assembly 421 extends into the first groove 13. The push rod assembly 421 is provided with a first guide rod 4213. At least a portion of the first guide rod 4213 is disposed in the first guide groove 131. One end of the push rod assembly 421 away from the bottom wall of the first groove 13 is rotatably connected to the first pull plate 41. The end of the push rod assembly 421 away from the bottom wall of the first groove 13 is fixed relative to the scraper 43 in the axial direction of the sampling cylinder 1. The push rod assembly 421 and the scraper 43 are movable relative to each other in the axial direction of the sampling cylinder 1.

[0042] Understandably, when the coal powder sampling device 100 is sampling, the user moves the first pull plate 41 along the axial direction of the sampling cylinder 1. The first pull plate 41 drives the push rod assembly 421 to move, and the first guide rod 4213 on the push rod assembly 421 moves. When the first guide rod 4213 moves in the first guide groove 131, the spirally extended first guide groove 131 drives the first guide rod 4213 to rotate, thereby realizing the rotation of the push rod assembly 421. The push rod assembly 421 drives the scraper 43 to rotate along the circumferential direction of the sampling cylinder 1. The scraper 43 drives the cover plate assembly 3 to move, and the cover plate assembly 3 opens the feed inlet 12. The auger 2 rotates, driving the external coal powder into the receiving space 11 from the feed inlet 12. After sampling is completed, the auger 2 stops rotating, and the user moves the first pull plate 41 in the opposite direction along the axial direction of the sampling cylinder 1. The first pull plate 41 drives the push rod assembly 421 to move in the opposite direction, and the first guide rod 4213 on the push rod assembly 421 moves in the opposite direction. When the first guide rod 4213 moves in the first guide groove 131, the spirally extended first guide groove 131 drives the first guide rod 4213 to rotate in the opposite direction, thereby realizing the reverse rotation of the push rod assembly 421. The push rod assembly 421 drives the scraper 43 to move in the opposite direction, and the cover plate assembly 3 closes the feed inlet 12. The coal powder sampling device 100 is taken out from inside the coal powder environment to avoid the coal powder sampling device 100 from changing the number of coal powder samples due to shaking or other reasons during the process of taking out from inside the coal powder environment. This also prevents the coal powder samples in the coal powder environment from entering the containment space 11 after sampling or the coal powder in the containment space 11 from flowing out from the feed inlet 12, making the coal powder sampling more accurate.

[0043] The push rod assembly 421 is rotatably connected to the first pull plate 41 at one end away from the bottom wall of the first groove 13, which prevents the first pull plate 41 from rotating when the push rod assembly 421 rotates, making it easier for the user to move the first pull plate 41 along the axial direction of the sampling cylinder 1. The push rod assembly 421 is fixed relative to the scraper 43 along the axial direction of the sampling cylinder 1. The push rod assembly 421 and the scraper 43 are relatively movable along the axial direction of the sampling cylinder 1, which prevents the scraper 43 from moving with the push rod assembly 421 when the push rod assembly 421 moves along the axial direction of the sampling cylinder 1, and prevents the cover plate assembly 3 from failing to completely block the feed inlet 12 along the axial direction of the sampling cylinder 1.

[0044] In this embodiment, a bearing is provided between the push rod assembly 421 and the first pull plate 41 to realize relative rotation between the push rod assembly 421 and the first pull plate 41. The push rod assembly 421 and the scraper 43 are connected by a flat key, wherein the keyway extends along the axial direction of the push rod assembly 421, and the length of the keyway is greater than the length of the flat key. The flat key can slide in the keyway to realize relative sliding between the push rod assembly 421 and the scraper 43 along the axial direction of the sampling cylinder 1.

[0045] In some embodiments of this utility model, such as Figure 1 and Figure 3 As shown, the transmission component 42 also includes an elastic component 422. One end of the elastic component 422 is disposed on the bottom wall of the first groove 13, and the other end is connected to the push rod assembly 421 for driving the push rod assembly 421 to move in a direction away from the bottom wall of the first groove 13.

[0046] Understandably, when the coal powder sampling device 100 is sampling, the user moves the first pull plate 41 toward the end of the sampling cylinder 1 that does not have the first groove 13 in the axial direction. The first pull plate 41 drives the push rod assembly 421 to move toward the bottom wall of the first groove 13, compressing the elastic element 422. The first guide rod 4213 on the push rod assembly 421 moves. When the first guide rod 4213 moves in the first guide groove 131, the spirally extended first guide groove 131 drives the first guide rod 4213 to rotate, thereby realizing the rotation of the push rod assembly 421. The push rod assembly 421 drives the scraper 43 to rotate in the circumferential direction of the sampling cylinder 1. The scraper 43 drives the cover plate assembly 3 to move, and the cover plate assembly 3 opens the feed inlet 12. The auger 2 rotates, driving the external coal powder into the receiving space 11 from the feed inlet 12. After sampling is completed, the auger 2 stops rotating, and the user releases the first pull plate 41. The elastic element 422 drives the push rod assembly 421 to move away from the bottom wall of the first groove 13. The first guide rod 4213 on the push rod assembly 421 moves away from the bottom wall of the first groove 13. When the first guide rod 4213 moves in the first guide groove 131, the spirally extended first guide groove 131 drives the first guide rod 4213 to rotate in the opposite direction, thereby realizing the reverse rotation of the push rod assembly 421. The push rod assembly 421 drives the scraper 43 to move in the opposite direction, and the cover plate assembly 3 closes the feed port 12. The coal powder sampling device 100 is taken out from inside the coal powder environment to avoid the coal powder sampling device 100 from changing the number of coal powder samples due to shaking or other reasons during the process of taking out from inside the coal powder environment. This also prevents the coal powder samples in the coal powder environment from entering the containment space 11 after sampling or the coal powder in the containment space 11 from flowing out from the feed port 12, making the coal powder sampling more accurate.

[0047] In this embodiment, the elastic element 422 is a spring, and the extension and contraction direction of the spring is the same as the axial direction of the first groove 13.

[0048] In some embodiments of this utility model, such as Figure 1 and Figure 3As shown, the push rod assembly 421 includes a push block 4211 and a push rod 4212. The outer peripheral wall of the push block 4211 fits against the inner peripheral wall of the first groove 13. The push rod 4212 is located at the end of the push block 4211 opposite to the bottom wall of the first groove 13. The push rod 4212 is clearance-fitted with the first groove 13. A first guide rod 4213 is mounted on the push rod. The push block 4211 provides guidance for the movement of the push rod 4212 along the axial direction of the first groove 13. When the first guide rod 4213 on the push rod 4212 moves within the first guide groove 131, the gap between the push rod 4212 and the inner wall of the first groove 13 provides a certain rotation space for the push rod 4212, preventing the first guide rod 4213 from breaking due to the push rod 4212's inability to rotate.

[0049] In this embodiment, the push block 4211 and the push rod 4212 are both coaxially arranged with the first groove 13. The outer side of the push block 4211 fits against the inner side of the first groove 13, and the central axis of the push block 4211 and the central axis of the push rod 4212 are on the same straight line, so that the push block 4211 will not wobble when it moves inside the first groove 13, and the movement of the push block 4211 and the push rod 4212 is more reliable.

[0050] In some embodiments of this utility model, such as Figure 1 and Figure 3 As shown, the first guide rod 4213 and the first guide groove 131 are fitted with a clearance to reduce the friction between the first guide rod 4213 and the first guide groove 131 and to prevent the first guide rod 4213 from breaking or being damaged.

[0051] In some embodiments of this utility model, such as Figure 1 As shown, the coal powder sampling device 100 also includes a first support plate 5 and a motor 6. One end of the first support plate 5 in the thickness direction is connected to the end of the sampling cylinder 1 away from the first groove 13. The motor 6 is fixedly connected to the end of the first support plate 5 away from the sampling cylinder 1. The output end of the motor 6 is fixedly connected to the auger 2, and the motor 6 is used to drive the auger 2 to rotate. This achieves electric drive of the auger 2, avoiding manual operation by the user, and at the same time, it can make the rotation of the auger 2 more stable, and the coal powder in the containing space 11 moves more evenly along the axial direction.

[0052] In this embodiment, as Figure 1As shown, a first handle 51 is provided on the first support plate 5, and a second handle 8 is provided at the end of the first pull plate 41 near the first support plate 5, making it convenient for the user to hold the coal powder sampling device 100 and to pull the first pull plate 41. A groove 16 is provided at the end of the sampling cylinder 1 near the first support plate 5, and the groove 16 extends along the length of the sampling cylinder 1. A slider 81 is provided at the section of the second handle 8 near the sampling cylinder 1, and the slider 81 slides within the groove 16. The axis of the groove 16 is parallel to the axis of the sampling cylinder 1, so that the slider 81 moves laterally within the groove 16.

[0053] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the cover plate assembly 3 includes a telescopic rod 31, a cover plate body 32, and a guide plate 33. The telescopic rod 31 is telescopic along its axial direction. One end of the telescopic rod 31 is fixedly connected to the scraper 43 in the axial direction. The axial direction of the telescopic rod 31 is perpendicular to the axial direction of the sampling cylinder 1. The cover plate body 32 is located at the end of the telescopic rod 31 away from the scraper 43. The outer peripheral wall of the sampling cylinder 1, which has a feed inlet 12, is provided with a second groove 14. The feed inlet 12 is located on the bottom wall of the second groove 14. The second groove 14 extends along the circumferential direction of the sampling cylinder 1. The cover plate body 32 is movably located in the second groove 14. The cover plate body 32 is used to open or close the feed inlet 12. The guide plate 33 is connected to at least one end of the cover plate body 32 along the axial direction of the sampling cylinder 1. The end of the second groove 14 away from the transmission member 42 is provided with a second guide groove 15. The guide plate 33 is located in the second guide groove 15.

[0054] Understandably, when the coal powder sampling device 100 is sampling, the user moves the first pull plate 41 toward the end of the sampling cylinder 1 that does not have the first groove 13 in the axial direction. The first pull plate 41 drives the push rod assembly 421 to move toward the bottom wall of the first groove 13. The elastic element 422 is compressed, and the first guide rod 4213 on the push rod assembly 421 moves. When the first guide rod 4213 moves in the first guide groove 131, the spirally extended first guide groove 131 drives the first guide rod 4213 to rotate, thereby realizing the rotation of the push rod assembly 421. The push rod assembly 421 drives the scraper 43 to rotate in the circumferential direction of the sampling cylinder 1. The scraper 43 drives the cover plate body 32 to move in the second groove 14 through the telescopic rod 31. The guide plate 33 is located in the second guide groove 15. The cover plate body 32 opens the feed port 12, the auger 2 rotates, and drives the external coal powder to enter the receiving space 11 from the feed port 12. After sampling is completed, the auger 2 stops rotating, and the user... When the first pull plate 41 is released, the elastic element 422 drives the push rod assembly 421 to move away from the bottom wall of the first groove 13. The first guide rod 4213 on the push rod assembly 421 moves away from the bottom wall of the first groove 13. When the first guide rod 4213 moves in the first guide groove 131, the spirally extended first guide groove 131 drives the first guide rod 4213 to rotate in the opposite direction, thereby realizing the reverse rotation of the push rod assembly 421. The push rod assembly 421 drives the scraper 43 to move in the opposite direction in the second groove 14 through the telescopic rod 31. The cover body 32 closes the feed inlet 12, and the coal powder sampling device 100 is taken out from inside the coal powder environment. This avoids the coal powder sample quantity from changing due to shaking or other reasons during the process of taking the coal powder sampling device 100 out of the coal powder environment. It also prevents the coal powder sample in the coal powder environment from entering the containment space 11 after sampling or the coal powder in the containment space 11 from flowing out of the feed inlet 12, making the coal powder sampling more accurate.

[0055] In some embodiments of this utility model, such as Figure 2 and Figure 5 As shown, the second guide groove 15 includes a body section 151 and a feeding section 152. The feeding section 152 and the feeding port 12 are arranged opposite to each other in the axial direction of the sampling cylinder 1. The feeding section 152 is recessed towards the side closer to the axis of the sampling cylinder 1. The guide plate 33 moves towards the side closer to the axis of the sampling cylinder 1 at the feeding section 152, which drives the cover plate body 32 to move towards the side closer to the axis of the sampling cylinder 1, so that the cover plate body 32 can better close the feeding port 12.

[0056] In this embodiment, the feed end can be V-shaped, U-shaped, or other shapes.

[0057] In some embodiments of this utility model, such as Figure 2As shown, a sealing gasket 7 is provided at one end of the bottom wall of the cover plate body 32 near the second groove 14. When the cover plate body 32 moves toward the side near the axis of the sampling cylinder 1, the cover plate body 32 squeezes the sealing gasket 7, so that the cover plate body 32 can better close the feed inlet 12 and prevent coal powder from flowing out of the receiving space 11 from the feed inlet 12.

[0058] Other components and operations of the coal powder sampling device 100 for coal powder fineness detection according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "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.

[0060] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A pulverized coal sampling device for detecting a pulverized coal fineness, characterized by, include: A sampling tube, wherein the sampling tube has an internal receiving space and an inlet is provided on the outer peripheral wall of the sampling tube, and the inlet is connected to the receiving space; An auger, rotatably disposed within the receiving space, is used to take samples from the feed inlet into the receiving space; A cover plate assembly, which is movably disposed on the sampling cylinder, is used to open or close the feed inlet.

2. The pulverized coal sampling device for detecting the fineness of the pulverized coal according to claim 1, characterized by, Also includes: A transmission device includes a first pull plate, a transmission component, and a scraper. The first pull plate is movable along the axial direction of the sampling cylinder. The scraper is fixedly connected to the cover plate assembly and rotatable along the circumferential direction of the sampling cylinder. At least a portion of the scraper is in contact with the outer circumferential wall of the sampling cylinder. The transmission component is connected to both the first pull plate and the scraper, and is used to convert the movement of the first pull plate along the axial direction of the sampling cylinder into the rotation of the scraper along the circumferential direction of the sampling cylinder.

3. The pulverized coal sampling device for detecting the fineness of the pulverized coal according to claim 2, characterized by, The sampling cylinder has a first groove at one end in the axial direction, and a first guide groove extending spirally along the axial direction of the first groove is provided on the peripheral wall of the first groove. The transmission component includes: A push rod assembly, at least a portion of which extends into the first groove, is provided with a first guide rod, at least a portion of which is disposed within the first guide groove. One end of the push rod assembly facing away from the bottom wall of the first groove is rotatably connected to the first pull plate. The other end of the push rod assembly facing away from the bottom wall of the first groove is fixed relative to the scraper along the axial direction of the sampling cylinder. The push rod assembly and the scraper are movable relative to each other along the axial direction of the sampling cylinder.

4. The pulverized coal sampling device for detecting the fineness of the pulverized coal according to claim 3, characterized by, The transmission component also includes: An elastic element, one end of which is disposed on the bottom wall of the first groove, and the other end is connected to the push rod assembly, for driving the push rod assembly to move in a direction away from the bottom wall of the first groove.

5. The pulverized coal sampling device for detecting the fineness of the pulverized coal according to claim 3, characterized by, The push rod assembly includes: A pusher block, the outer peripheral wall of which is in contact with the inner peripheral wall of the first groove; A push rod is provided at one end of the push block away from the bottom wall of the first groove. The push rod is in clearance fit with the first groove. The first guide rod is provided on the push rod.

6. The pulverized coal sampling device for detecting the fineness of the pulverized coal according to claim 3, characterized by, The first guide rod and the first guide groove are fitted with a clearance.

7. The pulverized coal sampling device for detecting the fineness of the pulverized coal according to claim 3, characterized by, Also includes: A first support plate, one end of the first support plate in the thickness direction is connected to the end of the sampling cylinder away from the first groove; The motor is fixedly connected to the end of the first support plate away from the sampling cylinder, and the output end of the motor is fixedly connected to the auger. The motor is used to drive the auger to rotate.

8. The pulverized coal sampling device for detecting the fineness of the pulverized coal according to claim 2, wherein The cover plate assembly includes: A telescopic rod, which is telescopic along its axial direction, with one end of the telescopic rod fixedly connected to the scraper, and the axial direction of the telescopic rod being perpendicular to the axial direction of the sampling cylinder; The cover plate body is located at the end of the telescopic rod away from the scraper. The outer peripheral wall of the sampling cylinder with the feed inlet is provided with a second groove. The feed inlet is located on the bottom wall of the second groove. The second groove extends along the circumferential direction of the sampling cylinder. The cover plate body is movably located in the second groove. The cover plate body is used to open or close the feed inlet. A guide plate is connected to at least one end of the cover plate body along the axial direction of the sampling cylinder. The end of the second groove opposite to the transmission member is provided with a second guide groove, and the guide plate is disposed in the second guide groove.

9. The pulverized coal sampling device for detecting the fineness of the pulverized coal according to claim 8, characterized by, The second guide groove includes a body section and a feeding section. The feeding section and the feeding port are arranged opposite to each other in the axial direction of the sampling cylinder. The feeding section is recessed towards the side close to the axis of the sampling cylinder.

10. The pulverized coal sampling device for detecting the fineness of the pulverized coal according to claim 8, wherein A sealing gasket is provided at one end of the cover plate body near the bottom wall of the second groove.

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