Rapid drying device for LIBS coal sample detection

Abstract

The utility model discloses a rapid drying device for LIBS coal sample detection, and relates to the technical field of coal quality analysis and inspection of coal-fired power plants. The coal sample drying device comprises a drying box, a drying assembly is arranged on the drying box, a rotating motor is fixedly connected to the upper surface of the drying box, a plurality of supporting frames are fixedly connected between the inner walls of the left side and the right side of the drying box, shaking mechanisms are arranged on the supporting frames, placing discs are arranged on the shaking mechanisms, and the placing discs are used for placing coal samples. When the rotating block drives the wheel to rotate with the supporting shaft as the center, the placing disc can be driven to shake up and down, so that a coal sample placed in the placing disc can be driven to shake, dynamic turning of the coal sample in the drying process is achieved, the contact area of the coal sample and air is increased, the coal sample is dried more evenly, and the coal sample drying efficiency is improved. The drying efficiency of the coal sample is improved, so that the practicability of the rapid drying device for LIBS coal sample detection is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to coal quality analysis and inspection technical field in coal -fired power plant, specifically, especially relate to a kind of fast drying device for LIBS coal sample detection. BACKGROUND

[0002] In the production process of coal-fired power plant, coal quality affects the process of pulverizing, combustion, desulfurization and denitrification, and the coal quality characteristics of different coal source coal varieties, such as carbon, sulfur, nitrogen content, calorific value, industrial index, etc. have great difference. In order to ensure the safety, economy, low carbon and environmental protection of power plant production process, accurate and rapid real-time analysis and detection of coal quality is essential. The existing coal quality analysis methods on the market include chemical analysis, laser-induced breakdown spectroscopy (LIBS), gamma-ray technology, prompt gamma neutron activation analysis (PGNAA), X-ray fluorescence (XRF) and near infrared spectroscopy (NIRS) detection methods. Laser-induced breakdown spectroscopy (LIBS) technology has the advantages of low sample preparation requirement, fast measurement speed, multi-element measurement, remote analysis, safety and no radiation, and is widely used in coal quality analysis and detection.

[0003] Before the coal sample is subjected to LIBS coal quality detection, the coal sample needs to be dried, so as to control the moisture content of the coal sample within a certain range. The existing coal drying device generally places the coal sample on a tray and places the tray in the drying device to realize the drying of the coal sample by combining heating and fan.

[0004] However, placing the coal sample on the tray for drying makes the coal sample remain stationary during the drying process, which can cause the coal sample on the surface to be quickly dried, while the coal sample at the bottom has low drying efficiency, which makes the uniformity of the coal sample drying poor, reduces the drying efficiency of the coal sample, and further reduces the practicability of the coal sample drying device. INVENTION CONTENTS

[0005] In view of the problem that placing the coal sample on the tray for drying makes the coal sample remain stationary during the drying process, which can cause the coal sample on the surface to be quickly dried, while the coal sample at the bottom has low drying efficiency, which makes the uniformity of the coal sample drying poor, reduces the drying efficiency of the coal sample, and further reduces the practicability of the coal sample drying device, the utility model proposes a fast drying device for LIBS coal sample detection to overcome the above technical problems existing in the prior art.

[0006] To solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a kind of LIBS coal sample detection with quick drying device, including drying cabinet, drying assembly is arranged on the drying cabinet, the upper surface of the drying cabinet is fixedly connected with rotating motor, the left and right two side inner walls of the drying cabinet are fixedly connected with multiple support frames, shaking mechanism is arranged on the support frame, shaking mechanism is arranged on the shaking mechanism and is placed with tray, the tray is used to place coal sample, the shaking mechanism can accelerate the drying of coal sample in the tray, the shaking mechanism is evenly provided with positioning mechanism, the positioning mechanism is used to fix the tray on the shaking mechanism, linkage mechanism is arranged on the drying cabinet, linkage mechanism is used to drive multiple shaking mechanism to shake simultaneously.

[0008] Further, the shaking mechanism includes a sliding block, the sliding block is arranged on the upper side of the support frame, the upper surface of the sliding block is provided with a sliding groove extending out of its lower surface, a plurality of support springs are fixedly connected between the lower surface of the sliding block and the upper surface of the support frame, the tray is slidably connected with the sliding groove, the upper surface of the tray is fixedly connected with a limiting frame, the lower surface of the limiting frame is in contact with the upper surface of the sliding block.

[0009] Further, the upper surface of the support frame is provided with two sliding holes extending out of its lower surface, the lower surface of the sliding block is fixedly connected with two vertical sliding rods, the vertical sliding rods are slidably connected with the corresponding sliding holes, the lower ends of the vertical sliding rods extend out of the lower surface of the support frame through the corresponding sliding holes.

[0010] Further, the lower surface of the sliding block is fixedly connected with the sliding frame, the front and rear inner walls of the support frame are rotatably connected with support shafts, the outer surfaces of the support shafts are fixedly sleeved with rotating blocks, the rotating blocks are in the shape of "U", two vertical blocks of the rotating block are rotatably connected with wheels, the sliding frame is also in the shape of "U".

[0011] Further, the positioning mechanism includes a fixed slot, the fixed slot is provided in the front inner wall of the sliding groove, a fixed sliding block is slidably connected in the fixed slot, a rubber pad is fixedly connected to the rear surface of the fixed sliding block, a mounting hole is provided in the front surface of the fixed sliding block, a threaded rod is threadedly connected to the front surface of the sliding block, the rear end of the threaded rod is threadedly penetrated into the fixed slot, the fixed sliding block is rotatably sleeved to the rear end of the threaded rod through a bearing.

[0012] Further, the linkage mechanism includes a positioning rod, an inner mounting slot is provided in the drying cabinet, the inner mounting slot is located between the rear inner wall of the drying cabinet and the rear surface of the drying cabinet, the rear ends of the support shafts are rotatably penetrated into the inner mounting slot, the positioning rod is rotatably connected between the upper and lower inner walls of the inner mounting slot.

[0013] Further, the upper end of the positioning rod is rotatable through the upper surface of the drying box, the rotating output shaft of the rotating motor is fixedly connected with the upper end of the positioning rod, a plurality of first bevel gears are fixedly sleeved on the outer surface of the positioning rod, and the rear end of each supporting shaft is fixedly connected with a second bevel gear.

[0014] The utility model has the following beneficial effects:

[0015] 1. When the rotating block drives the wheels to rotate around the supporting shaft, the placing disc can be driven to shake up and down, thereby the coal samples placed in the placing disc can be shaken, the dynamic turning of the coal samples in the drying process is realized, the contact area between the coal samples and the air is increased, the drying of the coal samples is more uniform, the drying efficiency of the coal samples is improved, and the practicality of the fast drying device for LIBS coal sample detection is increased.

[0016] 2. The placing disc is clamped and pressed in the sliding groove through the rotation of the threaded rod, the friction between the placing disc and the sliding groove is increased, the placing disc is fixed in the sliding groove, the placing disc is prevented from sliding out of the sliding groove when shaking, the stability of the fast drying device for LIBS coal sample detection is ensured, the placing disc is flexible and convenient to disassemble, the stability and practicality of the fast drying device for LIBS coal sample detection are improved.

[0017] 3. One rotating motor drives multiple shaking mechanisms to shake, thereby the coal samples in multiple placing discs can be shaken and dried, which is more efficient, saves more electric energy, and is more environmentally friendly and practical.

[0018] 4. The wheels are rotatably connected to the rotating block, the friction when the sliding frame is pushed to move upward is reduced, the abrasion is reduced, and the practicality of the fast drying device for LIBS coal sample detection is increased.

[0019] Of course, any product implementing the utility model does not necessarily need to achieve all the advantages mentioned above. DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0021] Figure 1 It is a whole structure schematic view of the utility model;

[0022] Figure 2 It is the internal structure schematic view of the drying box of the utility model;

[0023] Figure 3 It is the structure schematic view of the rotating block of the utility model;

[0024] Figure 4 It is the vertical section view of the drying box of the utility model;

[0025] Figure 5 It is the structure schematic view of the rear side of the sliding block of the utility model;

[0026] Figure 6 It is the structure schematic view of the rear side of the support frame of the utility model;

[0027] Figure 7 It is the structure schematic view of the fixed sliding block of the utility model.

[0028] In the drawings, the component list represented by each sign is as follows:

[0029] 1, drying box; 2, drying assembly; 3, rotating motor; 4, support frame; 5, sliding block; 6, sliding groove; 7, placing disc; 8, limiting frame; 9, fixed groove; 10, fixed sliding block; 11, rubber pad; 12, sliding frame; 13, support tension spring; 14, rotating block; 15, support shaft; 16, wheel; 17, threaded rod; 18, vertical sliding rod; 19, sliding hole; 20, positioning rod; 21, first bevel gear; 22, second bevel gear; 23, inner installation groove; 24, installation hole. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0031] In the description of the utility model, it is understood that the terms "opening", "upper", "lower", "top", "middle", "inner" and the like indicate the orientation or positional relationship, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated components or elements must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0032] Please refer to Figures 1-7The utility model discloses a kind of fast drying devices for LIBS coal sample detection, including drying cabinet 1, drying assembly 2 is provided on drying cabinet 1, the upper surface of drying cabinet 1 is fixedly connected with rotating motor 3, the inner wall between the left and right sides of drying cabinet 1 is fixedly connected with multiple support frames 4, shaking mechanism is provided on the support frame 4, placing tray 7 is provided on the shaking mechanism, the placing tray 7 is used to place coal sample, the shaking mechanism can accelerate the drying of coal sample in the placing tray 7, positioning mechanism is provided on the shaking mechanism, the positioning mechanism is used to fix the placing tray 7 on the shaking mechanism, linkage mechanism is provided on the drying cabinet 1, the linkage mechanism is used to drive multiple shaking mechanism to shake simultaneously.

[0033] When using, the coal sample to be dried is laid in the placing tray 7, and then the placing tray 7 is placed on the shaking mechanism, the placing tray 7 is fixed on the shaking mechanism by rotating the positioning mechanism, and then the rotating motor 3 is started. Under the cooperation of the linkage mechanism and the rotating motor 3, the rotating motor 3 drives the shaking mechanism to move synchronously after being started, and the shaking mechanism drives the placing tray 7 to shake up and down. The coal sample in the placing tray 7 can be shaken during the shaking of the placing tray 7, so that the drying of the coal sample is more uniform, and the efficiency of drying the LIBS coal sample is improved.

[0034] In one embodiment, for the above-mentioned shaking mechanism, the shaking mechanism includes a sliding block 5, the sliding block 5 is arranged on the upper side of the support frame 4, the upper surface of the sliding block 5 is provided with a sliding groove 6 extending out of the lower surface, a plurality of support springs 13 are fixedly connected between the lower surface of the sliding block 5 and the upper surface of the support frame 4, the placing tray 7 is slidably connected with the sliding groove 6, the upper surface of the placing tray 7 is fixedly connected with a limiting frame 8, and the lower surface of the limiting frame 8 is in contact with the upper surface of the sliding block 5.

[0035] The upper surface of the support frame 4 is provided with two sliding holes 19 extending out of the lower surface, the lower surface of the sliding block 5 is fixedly connected with two vertical sliding rods 18, the vertical sliding rods 18 are slidably connected with the corresponding sliding holes 19, and the lower ends of the vertical sliding rods 18 extend out of the lower surface of the support frame 4 through the corresponding sliding holes 19.

[0036] The lower surface of the sliding block 5 is fixedly connected with the sliding frame 12, the front and rear inner walls of the support frame 4 are rotatably connected with a support shaft 15, the outer surface of the support shaft 15 is fixedly sleeved with a rotating block 14, the rotating block 14 is in the shape of "U", two vertical blocks of the rotating block 14 are rotatably connected with a wheel 16, and the sliding frame 12 is also in the shape of "U".

[0037] In the initial state, the plurality of supporting tension springs 13 support the sliding block 5, the supporting shaft 15 rotates the synchronous belt to drive the rotating block 14 to rotate around the supporting shaft 15, the rotating block 14 drives the outer surface of the wheel 16 to contact the lower surface of the horizontal plate of the sliding frame 12 in the rotating process, the wheel 16 provides a pushing force to the lower surface of the sliding frame 12 in the rotating process, pushes the sliding frame 12 to move upward, the sliding frame 12 synchronously drives the sliding block 5 and the placing disc 7 fixed on the sliding block 5 to move upward, the sliding block 5 is stretched in the upward moving process, so that the supporting tension spring 13 is stretched and deformed, when the wheel 16 rotates to gradually separate from the sliding frame 12, the sliding block 5, the sliding frame 12 and the placing disc 7 fixed on the sliding block 5 are driven to move downward to reset under the action of the release force of the supporting tension spring 13, and then every time the rotating block 14 drives the wheel 16 to rotate around the supporting shaft 15, the placing disc 7 can be driven to vibrate up and down once, the placing disc 7 vibrates up and down to drive the coal sample placed in the placing disc 7 to vibrate, realizes dynamic stirring of the coal sample in the drying process, and then increases the contact area of the coal sample and air, so that the coal sample is dried more uniformly, improves the drying efficiency of the coal sample, and then increases the practicality of the rapid drying device for LIBS coal sample detection.

[0038] In one embodiment, for the positioning mechanism, the positioning mechanism comprises a fixed groove 9, the fixed groove 9 is arranged in the inner wall of the front side of the sliding groove 6, the fixed groove 9 is slidably connected with a fixed sliding block 10, the rear surface of the fixed sliding block 10 is fixedly connected with a rubber pad 11, the front surface of the fixed sliding block 10 is provided with a mounting hole 24, the front surface of the sliding block 5 is threadedly connected with a threaded rod 17, the rear end of the threaded rod 17 is threadedly penetrated into the fixed groove 9, and the fixed sliding block 10 is rotatably sleeved on the rear end of the threaded rod 17 through a bearing.

[0039] In addition, in specific application, the placing disc 7 is slid into the sliding groove 6, so that the lower surface of the limiting frame 8 is in contact with the upper surface of the sliding block 5, at this time, the threaded rod 17 is rotated, because the threaded rod 17 is threadedly connected with the sliding block 5, and the fixed sliding block 10 is rotatably sleeved at the rear end of the threaded rod 17, so that the rotation of the threaded rod 17 can drive the fixed sliding block 10 to move back and forth, when the fixed sliding block 10 moves backward, the rubber pad 11 can be moved out of the fixed groove 9, and the rear surface of the rubber pad 11 is in contact with the front surface of the placing disc 7, and with the rotation of the threaded rod 17, the placing disc 7 is pressed and clamped in the sliding groove 6, the friction between the placing disc 7 and the sliding groove 6 is increased, and then the placing disc 7 is fixed in the sliding groove 6, so that the placing disc 7 is prevented from sliding out of the sliding groove 6 when the placing disc 7 is shaken, and the stability of the LIBS coal sample detection rapid drying device is ensured; on the contrary, when the placing disc 7 is disassembled, the threaded rod 17 is rotated to drive the rubber pad 11 to move forward to be not in contact with the front surface of the placing disc 7, so that the placing disc 7 is disassembled flexibly and conveniently, and the stability and practicality of the LIBS coal sample detection rapid drying device are increased.

[0040] In one embodiment, for the linkage mechanism described above, the linkage mechanism comprises a positioning rod 20, the drying box 1 is provided with an inner mounting groove 23, the inner mounting groove 23 is located between the rear inner wall of the drying box 1 and the rear surface of the drying box 1, the rear end of the support shaft 15 is rotatably penetrated into the inner mounting groove 23, and the positioning rod 20 is rotatably connected between the upper and lower inner walls of the inner mounting groove 23.

[0041] The upper end of the positioning rod 20 is rotatably penetrated out of the upper surface of the drying box 1, the rotating output shaft of the rotating motor 3 is fixedly connected with the upper end of the positioning rod 20, a plurality of first bevel gears 21 are fixedly sleeved on the outer surface of the positioning rod 20, the rear end of the support shaft 15 is fixedly connected with a second bevel gear 22, and the second bevel gear 22 is meshingly connected with the corresponding first bevel gear 21.

[0042] Starting the rotating motor 3 can drive the positioning rod 20 to rotate, the positioning rod 20 rotates synchronously to drive the plurality of first bevel gears 21 fixed thereon to rotate, and then synchronously drive the plurality of second bevel gears 22 corresponding thereto to rotate, and then synchronously drive the plurality of support shafts 15 to rotate, and then synchronously drive the plurality of shaking mechanisms to shake, so that the coal samples in the plurality of placing discs 7 can be shaken and dried, which is more efficient, saves more electric energy, and is more environmentally friendly and practical.

[0043] In the scheme, the rotating wheel 16 is connected to the rotating block 14, which can push the friction force to reduce the sliding frame 12 to move upward, thereby reducing the wear, and thereby increasing the practicality of the LIBS coal sample detection fast drying device.

[0044] In the scheme, the vertical slide rod 18 is connected to the slide hole 19, which restricts the sliding block 5, so that the sliding block 5 can only be shaken up and down, and cannot be shaken in other directions, thereby ensuring the stability of the shaking of the placing disc 7, and thereby increasing the practicality of the LIBS coal sample detection fast drying device.

[0045] In the scheme, the rotating motor 3 drives the placing disc 7 to high-frequency shake, so as to ensure the drying effect of the coal sample.

[0046] In the scheme, the drying assembly 2 includes a heater, a blower, a heating box, a ventilation fan and a fan housing, etc., which is the existing technology in the existing patent: CN202421366066.8 Coal sample drying device for coal quality analysis, which is not described here.

[0047] According to the above technical scheme of the utility model, the lower surface of the limiting frame 8 is in contact with the upper surface of the sliding block 5 by sliding the placing disc 7 into the sliding groove 6, at this time, the threaded rod 17 is rotated, because the threaded rod 17 is in threaded connection with the sliding block 5, and the fixed sliding block 10 is rotatably sleeved on the rear end of the threaded rod 17, so rotating the threaded rod 17 can drive the fixed sliding block 10 to move back and forth, when the fixed sliding block 10 moves backward, the rubber pad 11 can be moved out of the fixed groove 9, and the rear surface of the rubber pad 11 is in contact with the front surface of the placing disc 7, and the placing disc 7 is squeezed and clamped in the sliding groove 6 by rotating the threaded rod 17, the friction between the placing disc 7 and the sliding groove 6 is increased, and then the placing disc 7 is fixed in the sliding groove 6, the rotating motor 3 is started, and the positioning rod 20 is rotated, the plurality of first bevel gears 21 fixed on the positioning rod 20 are rotated synchronously, and then the plurality of second bevel gears 22 corresponding to the first bevel gears 21 are rotated synchronously, and then the plurality of supporting shafts 15 are rotated synchronously, in the initial state, the plurality of supporting tension springs 13 support the sliding block 5, the supporting shaft 15 is rotated, the rotating block 14 is rotated around the supporting shaft 15 synchronously, the outer surface of the wheel 16 is in contact with the lower surface of the horizontal plate of the sliding frame 12 during the rotation of the rotating block 14, the sliding frame 12 is pushed upward by the pushing force of the wheel 16 during the rotation of the wheel 16, the sliding block 5 and the placing disc 7 fixed on the sliding block 5 are moved upward synchronously with the upward movement of the sliding frame 12, the plurality of supporting tension springs 13 are stretched during the upward movement of the sliding block 5, and the supporting tension springs 13 are deformed by stretching, when the wheel 16 is rotated to be gradually separated from the sliding frame 12, the sliding block 5, the sliding frame 12 and the placing disc 7 fixed on the sliding block 5 are moved downward to reset under the action of the release force of the supporting tension springs 13, and then the rotating block 14 drives the wheel 16 to rotate around the supporting shaft 15 once every time, and the placing disc 7 can be shaken up and down once, the coal samples placed in the placing disc 7 can be shaken up and down, the dynamic turning of the coal samples during the drying process is realized, the contact area between the coal samples and air is increased, and the coal samples are dried more uniformly.

[0048] According to the above technical scheme, 1, the placing disc 7 can be shaken up and down once every time the rotating block 14 drives the wheel 16 to rotate around the supporting shaft 15 once, the coal samples placed in the placing disc 7 can be shaken up and down, the dynamic turning of the coal samples during the drying process is realized, the contact area between the coal samples and air is increased, the coal samples are dried more uniformly, the drying efficiency of the coal samples is improved, and the practicality of the fast drying device for LIBS coal sample detection is improved.

[0049] 2. By rotating the threaded rod 17, the placement plate 7 is squeezed and clamped into the sliding groove 6, increasing the friction between the placement plate 7 and the sliding groove 6, thereby fixing the placement plate 7 in the sliding groove 6 and preventing the placement plate 7 from sliding out of the sliding groove 6 when it vibrates. This ensures the stability of the rapid drying device for LIBS coal sample testing, and the placement plate 7 is flexible and convenient to disassemble, improving the stability and practicality of the rapid drying device for LIBS coal sample testing.

[0050] 3. A rotating motor 3 drives multiple shaking mechanisms to shake, which in turn drives multiple placement trays 7 to shake and dry the LIBS coal sample. This method is more efficient, saves more energy, and is more environmentally friendly and practical.

[0051] 4. By rotating the wheel 16 onto the rotating block 14, the frictional force that pushes the sliding frame 12 upward can be reduced, thereby reducing wear and increasing the practicality of the rapid drying device for LIBS coal sample testing.

[0052] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," 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 utility model. 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.

[0053] The preferred embodiments of the utility model disclosed above are merely illustrative of the utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the utility model, thereby enabling those skilled in the art to better understand and utilize it. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A kind of fast drying device for LIBS coal sample detection, including drying oven (1), it is characterized in that: The drying box (1) is provided with a drying assembly (2), the upper surface of the drying box (1) is fixedly connected with a rotating motor (3), a plurality of support frames (4) are fixedly connected between the left and right side inner walls of the drying box (1), a shaking mechanism is arranged on each support frame (4), a placing disc (7) is arranged on the shaking mechanism, the placing disc (7) is used for placing coal samples, the shaking mechanism can accelerate the drying of the coal samples in the placing disc (7), a positioning mechanism is arranged on each shaking mechanism, and the positioning mechanism is used for fixing the placing disc (7) on the shaking mechanism; and a linkage mechanism is arranged on the drying box (1) and used for driving a plurality of shaking mechanisms to shake simultaneously.

2. The rapid drying device for LIBS coal sample detection according to claim 1, characterized in that: The shaking mechanism comprises a sliding block (5), the sliding block (5) is arranged on the upper side of the support frame (4), the upper surface of the sliding block (5) is provided with a sliding groove (6) extending out of the lower surface thereof, a plurality of supporting tension springs (13) are fixedly connected between the lower surface of the sliding block (5) and the upper surface of the support frame (4), the placing disc (7) is in sliding connection with the sliding groove (6), and the upper surface of the placing disc (7) is fixedly connected with a limiting frame (8); and the lower surface of the limiting frame (8) is in contact with the upper surface of the sliding block (5).

3. The rapid drying device for LIBS coal sample detection according to claim 2, characterized in that: The upper surface of the support frame (4) is provided with two sliding holes (19) extending out of the lower surface thereof, the lower surface of the sliding block (5) is fixedly connected with two vertical sliding rods (18), the vertical sliding rods (18) are in sliding connection with the corresponding sliding holes (19), and the lower ends of the vertical sliding rods (18) extend out of the lower surface of the support frame (4) through the corresponding sliding holes (19).

4. The rapid drying device for LIBS coal sample detection according to claim 3, characterized in that: The lower surface of the sliding block (5) is fixedly connected with a sliding frame (12), the front and rear side inner walls of the support frame (4) are rotatably connected with a support shaft (15), the outer surface of the support shaft (15) is fixedly sleeved with a rotating block (14), the rotating block (14) is in the shape of a "U", two vertical blocks of the rotating block (14) are rotatably connected with a wheel (16), and the sliding frame (12) is also in the shape of a "U".

5. The rapid drying device for LIBS coal sample detection according to claim 4, characterized in that: The positioning mechanism comprises a fixed groove (9), the fixed groove (9) is arranged on the front side inner wall of the sliding groove (6), a fixed sliding block (10) is in sliding connection with the fixed groove (9), the rear side surface of the fixed sliding block (10) is fixedly connected with a rubber pad (11), the front side surface of the fixed sliding block (10) is provided with a mounting hole (24), the front side surface of the sliding block (5) is threadedly connected with a threaded rod (17), the rear end of the threaded rod (17) is threadedly penetrated into the fixed groove (9), and the fixed sliding block (10) is rotatably sleeved on the rear end of the threaded rod (17) through a bearing.

6. The rapid drying device for LIBS coal sample detection according to claim 5, characterized in that: The linkage mechanism comprises a positioning rod (20), an inner mounting groove (23) is formed on the drying box (1), the inner mounting groove (23) is located between the rear inner wall of the drying box (1) and the rear surface of the drying box (1), the rear ends of the support shafts (15) are rotatably penetrated into the inner mounting groove (23), and the positioning rod (20) is rotatably connected between the upper and lower inner walls of the inner mounting groove (23).

7. The rapid drying device for LIBS coal sample detection according to claim 6, characterized in that: The upper end of the positioning rod (20) is rotatably penetrated out of the upper surface of the drying box (1), the rotating output shaft of the rotating motor (3) is fixedly connected with the upper end of the positioning rod (20), a plurality of first bevel gears (21) are fixedly sleeved on the outer surface of the positioning rod (20), the rear ends of the support shafts (15) are fixedly connected with second bevel gears (22), and the second bevel gears (22) are meshedly connected with the corresponding first bevel gears (21).

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