Automatic sample bottle conveying structure and factory coal acceptance system comprising same

Abstract

The invention relates to the technical field of sample bottle conveying, in particular to an automatic sample bottle conveying structure and a plant coal acceptance system comprising the same, the automatic sample bottle conveying structure comprises a working frame, a conveying mechanism is mounted on the working frame, a sampling mechanism is arranged on one side of the tail end of the conveying mechanism, and a sample bottle is arranged in the sampling mechanism; a pneumatic pipe for transporting the sample bottles is arranged on one side of the sampling mechanism, and one end, far away from the sampling mechanism, of the pneumatic pipe is connected with a vacuum conveying mechanism. According to the invention, automatic sampling, vacuum conveying, multi-stage pressurization, noise reduction, filtering and ash removal and air pressure balance are integrated, and an efficient, stable and low-noise factory coal sample bottle transportation and detection process is realized; the multi-cavity vacuum structure and flow field optimization significantly improve the suction force and stability, the filtration and blowback technology reduces the maintenance cost, and the whole machine is continuous and reliable in operation and adapts to high-strength industrial use requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of sample bottle transmission, in particular to an automatic sample bottle transmission structure and a factory coal acceptance system containing the structure. Background Art

[0002] Existing coal sampling and transportation systems at coal mines often rely on manual labor or a single mechanical device. The process from coal mine transportation to sampling, filling sample bottles, and transporting them to the testing lab involves numerous steps, resulting in a low degree of automation and low efficiency. Furthermore, the sampling process is susceptible to human influence, leading to insufficient sample representation. This repetitive operation is not only labor-intensive for workers, but can also lead to deviations from standard operating procedures, further reducing sample quality and increasing the risk of errors in subsequent test results.

[0003] Traditional vacuum conveying devices generally use a single-stage or simple vacuum chamber structure, resulting in unstable vacuum levels and insufficient suction. Sample bottles are prone to speed fluctuations or even stalling within the pneumatic tube, affecting detection efficiency. Stagnation requires manual intervention to clear the tube, further extending sample turnaround time and making it difficult to meet the rapid testing requirements of modern coal mines.

[0004] Furthermore, existing pneumatic conveying systems generate high noise levels during high-speed exhaust, significantly impacting the operating environment over extended periods. Furthermore, airflow shock is not effectively buffered, which can easily cause equipment vibration and component fatigue. Continuous noise pollution can affect operators' work status and health, while equipment vibration can accelerate wear on pipe connections, increasing maintenance costs and the likelihood of downtime. Summary of the Invention

[0005] The purpose of the present invention is to solve the above-mentioned shortcomings in the prior art and to propose an automatic sample bottle transmission structure and a factory coal acceptance system containing the mechanism.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: The automatic sample bottle transport structure includes a workbench, a transport mechanism is installed on the workbench, a sampling mechanism is provided on one end of the transport mechanism, a sample bottle is provided in the sampling mechanism, and a pneumatic tube for transporting the sample bottle is provided on one side of the sampling mechanism, and the end of the pneumatic tube away from the sampling mechanism is connected to a vacuum conveying mechanism; The vacuum conveying mechanism includes a mounting frame fixedly mounted on a platform on one side of the workbench, a receiving frame fixedly mounted on the upper end surface of the mounting frame, a sealing frame connected to the top end of the receiving frame, a vacuum generator connected to the top end of the sealing frame, an inner frame mounted inside the sealing frame, an end of the pneumatic tube away from the sampling mechanism is connected to the interior of the inner frame after passing through the side wall of the sealing frame, and a discharging mechanism is provided at the lower end of the inner frame; The vacuum generator is provided with multiple cavities inside, including a linearly arranged air inlet chamber, a first vacuum chamber, two adjacent second vacuum chambers, a silencer chamber, and a third vacuum chamber arranged below the air inlet chamber, the first vacuum chamber and the second vacuum chamber. The air inlet chamber is provided with a pipe interface at one end away from the first vacuum chamber, and the third vacuum chamber is connected to the inner frame. The external compressed gas enters the air inlet chamber through the pipe interface and is finally discharged through the silencer chamber. In this process, negative pressure is generated inside the inner frame.

[0007] Preferably, the working frame is divided into two layers, the upper and lower layers, and the transportation mechanism includes a factory coal conveyor fixedly installed on the upper layer of the working frame and a factory coal filter fixedly installed on the lower layer of the working frame. The output end of the factory coal conveyor is fixedly installed with a first transportation frame, and the input end of the factory coal filter is located directly below the first transportation frame. The output end of the factory coal filter is fixedly installed with a second transportation frame, and a hoist is provided on one side of the second transportation frame, and the discharge port of the second transportation frame is connected to the feed port of the hoist.

[0008] Preferably, the sampling mechanism includes a sampling device fixedly mounted on one side of the tail end of the factory coal filter, the sampling device is driven by a drive motor fixedly mounted on the factory coal filter, the drive motor drives the sampling shovel inside the sampling device to rotate at a constant speed, a rotating device is provided at the lower side of the sampling device, a plurality of sample bottles are mounted on the working end of the rotating device, the rotating device drives the plurality of sample bottles to rotate periodically, and the output end of the sampling device is located directly above one of the sample bottles.

[0009] Preferably, the discharging mechanism includes a sealing cover installed at the lower end outlet of the inner frame and designed to be rotatable. A sealing cover device that drives the sealing cover to open and close is fixedly installed on one side of the sealing frame. The motor in the sealing cover device opens the sealing cover through a force arm, and a transportation interface is connected to the side of the receiving frame.

[0010] Preferably, a respirator is fixedly installed below the side of the sealing frame, and the working end of the respirator is located in the inner frame. When the sealing cover device opens / closes the cover, it automatically inhales or discharges air to eliminate the pressure difference between the inside and outside of the inner frame.

[0011] Preferably, the air inlet chamber is designed in a cube shape and its right side is connected to the first vacuum chamber through a first through hole. The first vacuum chamber is designed in a vertical rectangular shape. The right side of the first vacuum chamber is connected to the adjacent second vacuum chamber through a second through hole, and the bottom is connected to the third vacuum chamber through an air outlet. The second vacuum chamber is designed in a cube shape and is larger than the air inlet chamber. The two second vacuum chambers are connected through the third through hole, and the lower ends of the two second vacuum chambers are connected to the third vacuum chamber through the air outlet. A curved air guide plate is fixedly installed on the left side of the inside of the second vacuum chamber, and the air guide plate is located below the second or third through hole. The second vacuum chamber adjacent to the silencer chamber is connected to the silencer chamber through a fourth through hole, and the apertures of the first to fourth through holes gradually increase.

[0012] Preferably, the silencer cavity is composed of a curved plate, sound-absorbing cotton and an air outlet. The curved plate is fixedly installed on the right side of the silencer cavity, the air outlet is opened below the silencer cavity, and sound-absorbing cotton is attached to the surface of the curved plate and the bottom of the air outlet.

[0013] Preferably, a filtering mechanism is provided between the vacuum generator and the inner frame, and the filtering mechanism includes a filter detachably mounted in the inner frame, the lower end of the filter is hollowed out, a filter frame is provided at the top of the filter, the filter frame is connected to the third vacuum chamber, and a cleaning mechanism is provided inside the filter frame.

[0014] Preferably, the cleaning mechanism includes a flat air bag installed on one side of the filter frame, compressed air is stored in the flat air bag, a back-blow valve is connected to one side of the flat air bag, the air outlet of the back-blow valve is connected to the outside world, and the back-blow valve releases high-pressure airflow to flush the filter surface.

[0015] Compared with the prior art, the advantages of the present invention are: 1. This application realizes the automation of the entire process of factory coal from operation, filtration, sampling to sample bottle filling through a factory coal operation machine, a transport frame, a filter and a sampling device controlled by a drive motor; the rotating device automatically replaces the empty bottles, reducing manual intervention and improving sampling efficiency and consistency; the pneumatic tube and the vacuum generator are linked to quickly deliver the sample bottles to the inspection room, eliminating the manual handling link, shortening the time from sampling to testing, and improving the timeliness of testing and production continuity.

[0016] 2. This vacuum generator utilizes a series-connected structure consisting of an air inlet chamber, a primary vacuum chamber, and multiple secondary vacuum chambers. This design, combined with gradually expanding diameter holes and vertical expansion, creates a stepped vacuum enhancement. Curved air guides create a vortex suction effect, increasing the negative pressure within the pneumatic tube and enhancing the suction and transport capabilities of sample bottles. The superposition of multiple vacuum peaks ensures fast transport speeds and high vacuum stability.

[0017] 3. Before entering the silencer cavity, the airflow of this application is guided by the curved plate to rotate downward, extending the sound wave attenuation path. Combined with the sound-absorbing cotton material, it significantly reduces the gas emission noise and improves the working environment. The large cavity is combined with the air guide structure to not only reduce noise, but also stabilize the airflow conveying trajectory, ensuring the smooth operation and safety of materials during vacuum transmission.

[0018] 4. In this application, after the pneumatic tube inhales air, the filter and filter frame perform double filtration to prevent dust and impurities from entering the vacuum system; the back-blowing valve cooperates with the flat air bag to flush the filter surface with high-pressure airflow, quickly removing accumulated dust, extending the filter life, and reducing maintenance frequency and replacement costs; at the same time, the back-blowing exhaust port design can balance the system pressure to avoid equipment damage caused by excessive pressure difference.

[0019] 5. The respirator on the side of the sealing frame of this application automatically intakes and exhausts air during the operation of opening and closing the cover, eliminating the pressure difference between the inside and outside, and avoiding the impact of vacuum fluctuations on the conveying efficiency; the air pressure balance reduces the pauses and impacts of materials during the conveying process, ensuring the long-term stable operation of the equipment, and reducing energy consumption and component wear rate, thereby improving the reliability and service life of the overall system.

[0020] In summary, the present invention integrates automated sampling, vacuum transportation, multi-stage pressurization, noise reduction, filtration and cleaning, and air pressure balance, realizing an efficient, stable, and low-noise factory coal sample bottle transportation and detection process; its multi-cavity vacuum structure and flow field optimization significantly improve suction and stability, and the filtration and backflushing technology reduces maintenance costs. The whole machine operates continuously and reliably, and is suitable for high-intensity industrial use needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall axonometric structure of the automatic sample bottle transmission structure proposed in the present invention.

[0022] Figure 2 This is a schematic structural diagram of the driving motor and sampling device of the automatic sample bottle transmission structure proposed in the present invention.

[0023] Figure 3 This is a schematic diagram of the sample bottle and rotating device structure of the automatic sample bottle transmission structure proposed by the present invention.

[0024] Figure 4 This is a schematic diagram of the pneumatic tube and mounting frame structure of the automatic sample bottle transmission structure proposed in the present invention.

[0025] Figure 5 This is a schematic diagram of the receiving frame and transport interface structure of the automatic sample bottle transmission structure proposed in the present invention.

[0026] Figure 6 This is a schematic structural diagram of the respirator and sealing cover device of the automatic sample bottle transmission structure proposed in the present invention.

[0027] Figure 7 This is a schematic diagram of the inner frame structure of the automatic sample bottle transmission structure proposed in the present invention.

[0028] In the figure: 1 working frame, 2 factory coal transport machine, 3 first transport frame, 4 factory coal filter, 5 driving motor, 6 sampling device, 7 rotating device, 8 sample bottle, 9 second transport frame, 10 elevator, 11 pneumatic tube, 12 bending plate, 13 mounting frame, 14 transport interface, 15 sound-absorbing cotton, 16 receiving frame, 17 vacuum generator, 18 air outlet, 19 sealing frame, 20 sealing cover device, 21 respirator, 22 air inlet chamber, 23 inner frame, 24 filter frame, 25 filter, 26 flat air bag, 27 backblowing valve, 28 first vacuum chamber, 29 air guide plate, 30 second vacuum chamber, 31 third vacuum chamber. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] Reference Figures 1 to 7 The automatic sample bottle transmission structure and the factory coal acceptance system containing the mechanism include a work frame 1. The work frame 1 is divided into two layers, the upper layer is fixedly installed with a factory coal conveyor 2, and the lower layer is fixedly installed with a factory coal filter 4. The factory coal conveyor 2 and the factory coal filter 4 are both existing technologies, and their specific structural designs are not described in detail here. The output end of the factory coal conveyor 2 is fixedly installed with a first transport frame 3, and the input end of the factory coal filter 4 is just located directly below the first transport frame 3, so that the factory coal in the first transport frame 3 can just fall into the factory coal filter 4 for impurity filtration and further transportation.

[0031] A sampling device 6 is fixedly mounted on one side of the tail end of the factory coal filter 4. The sampling device 6 is driven by a drive motor 5 fixedly mounted on the factory coal filter 4. The drive motor 5 drives the sampling shovel inside the sampling device 6 to rotate at a constant speed. A rotating device 7 is provided below one side of the sampling device 6. A plurality of sample bottles 8 are mounted on the working end of the rotating device 7. The rotating device 7 drives the plurality of sample bottles 8 to rotate periodically. The output end of the sampling device 6 is located just above one of the sample bottles 8, so that the sampling shovel can fill the shoveled factory coal into the sample bottle 8 below through the outer frame of the sampling device 6 to complete the sampling. A second transport frame 9 is fixedly mounted on the output end of the factory coal filter 4. An elevator 10 is provided on one side of the second transport frame 9. The discharge port of the second transport frame 9 is connected to the feed port of the elevator 10, so that the factory coal that has not been sampled can be transported to the elevator 10 through the second transport frame 9 and then transferred to the next processing link.

[0032] A pneumatic tube 11 is detachably mounted on the side wall of the hoist 10. The lower end of the pneumatic tube 11 is located on one side of the rotating device 7, so that workers can put the sample bottle 8 filled with factory coal into the pneumatic tube 11. The end of the pneumatic tube 11 away from the rotating device 7 is connected to a vacuum conveying mechanism. The vacuum conveying mechanism includes a mounting frame 13 fixedly mounted on a platform on one side of the workbench 1. A receiving frame 16 is fixedly mounted on the upper end surface of the mounting frame 13. The top of the receiving frame 16 is connected to a sealing frame 19. The top of the sealing frame 19 is connected to a vacuum generator 17. An inner frame 23 is installed inside the sealing frame 19. The pneumatic tube 11 is away from the rotating device. One end of the device 7 is connected to the inside of the inner frame 23 after passing through the side wall of the sealing frame 19, so that the sample bottle 8 in the pneumatic tube 11 is moved into the inner frame 23. A rotatable sealing cover is installed at the lower end outlet of the inner frame 23. A sealing cover device 20 for driving the sealing cover to open and close is fixedly installed on one side of the sealing frame 19. The motor in the sealing cover device 20 can open the sealing cover through a force arm, so that the sample bottle 8 falls into the receiving frame 16, which is convenient for the inspector to take out the sample bottle 8 for testing the factory coal inside it. A transport interface 14 is connected to the side of the receiving frame 16, and the sample bottle 8 is moved to the next testing site through the transport interface 14.

[0033] A respirator 21 is fixedly installed at the lower side of the sealing frame 19. The working end of the respirator 21 is located in the inner frame 23. When the sealing cover device 20 opens / closes the cover, it automatically inhales or discharges air, thereby eliminating the pressure difference between the inside and outside of the inner frame 23, reducing the vacuum fluctuation inside the inner frame 23, ensuring continuous and smooth material transportation, and reducing the failure rate.

[0034] The vacuum generator 17 is provided with a plurality of cavities inside, including an air inlet chamber 22, a first vacuum chamber 28, two adjacent second vacuum chambers 30, a silencer chamber, and a third vacuum chamber 31 arranged below the air inlet chamber 22, the first vacuum chamber 28, and the second vacuum chamber 30. The air inlet chamber 22 is provided with a pipe interface at one end away from the first vacuum chamber 28, and the external compressed gas enters the air inlet chamber 22 through the pipe interface. The air inlet chamber 22 is designed in a cube shape and its right side is connected to the first vacuum chamber 28 through a first through hole. The first vacuum chamber 28 is designed in a vertical rectangular parallelepiped shape. The right side of the first vacuum chamber 28 is connected to the first vacuum chamber 28. The adjacent second vacuum chambers 30 are connected through the second through hole, and are connected to the third vacuum chamber 31 through the air outlet at the bottom. The second vacuum chamber 30 is also designed in a cube shape but is larger than the air inlet chamber 22. The two second vacuum chambers 30 are connected through the third through hole, and the lower ends of the two second vacuum chambers 30 are connected to the third vacuum chamber 31 through the air outlet. A curved air guide plate 29 is fixedly installed on the left side of the second vacuum chamber 30. The air guide plate 29 is located below the second or third through hole. The second vacuum chamber 30 adjacent to the silencer chamber is connected to the silencer chamber through the fourth through hole, and the apertures of the first to fourth through holes gradually increase.

[0035] The silencer cavity is composed of a curved plate 12, sound-absorbing cotton 15 and an air outlet 18. The curved plate 12 is fixedly installed on the right side of the silencer cavity. The air outlet 18 is opened below the silencer cavity, and sound-absorbing cotton 15 is attached to the surface of the curved plate 12 and the bottom of the air outlet 18. The curved plate 12 is used to force the airflow to rotate, guide the airflow to rotate downward, extend the sound wave attenuation path, and cooperate with the wrapped sound-absorbing cotton 15 to greatly reduce the decibel value when the gas is discharged.

[0036] A filtering mechanism is provided between the vacuum generator 17 and the inner frame 23. The filtering mechanism includes a filter 25 detachably installed in the inner frame 23. The lower end of the filter 25 is hollowed out so that the gas in the inner frame 23 can flow upward after being filtered by the filter 25. A filter frame 24 is provided at the top of the filter 25. The filter frame 24 is connected to the third vacuum chamber 31. A flat air bag 26 is installed on one side of the inside of the filter frame 24. Compressed air is stored in the flat air bag 26. A back-blow valve 27 is connected to one side of the flat air bag 26. The air outlet of the back-blow valve 27 is connected to the outside world. The high-pressure airflow is quickly released through the back-blow valve 27 to flush the dust on the surface of the filter 25. The air outlet of the back-blow valve 27 is connected to the outside world for discharging back-blow exhaust gas and balancing the system pressure to increase the service life of the filter 25.

[0037] When the present invention is working, workers perform relevant operations through the work frame 1, and use the factory coal conveyor 2 to transport the coal mine from the outside into the factory. The transported factory coal is moved to the factory coal filter 4 through the first transport frame 3 for impurity filtering and further transportation. At the tail of the factory coal filter 4, a sampling device 6 driven by a drive motor 5 is installed. The drive motor 5 drives the sampling shovel inside the sampling device 6 to rotate at a constant speed. The sampling shovel fills the shoveled factory coal into the sample bottle 8 below through the outer frame of the sampling device 6. The sample bottle 8 is installed inside the rotating device 7. After filling a sample bottle 8, the rotating device 7 rotates once, and the empty sample bottle 8 is aligned with the output end of the sampling device 6 for the next sampling. The factory coal that has not been sampled is transported to the elevator 10 through the second transport frame 9 and transferred to the next processing link.

[0038] The worker puts the sample bottle 8 filled with factory coal into the pneumatic tube 11 and starts the vacuum generator 17. The compressed gas enters through the pipe interface on the side of the air inlet chamber 22, and is discharged through the air outlet 18 after passing through the air inlet chamber 22, the first vacuum chamber 28, and the second vacuum chamber 30 in sequence, so that the interior of the pneumatic tube 11 is in a negative pressure environment. Under the action of atmospheric pressure, the gas inside the inner frame 23 passes through the third vacuum chamber 31 and enters the second vacuum chamber 30 and is discharged together, so that the inner frame 23 is in a negative pressure state, thereby Generate attraction to move the sample bottle 8 in the pneumatic tube 11, and the sample bottle 8 enters the sealing frame 19 below the vacuum generator 17 and falls into the inner frame 23. The motor in the sealing cover device 20 is started, and the sealing cover at the bottom of the inner frame 23 is opened by the force arm, allowing the sample bottle 8 to fall into the receiving frame 16, which makes it convenient for the inspector to take out the sample bottle 8 and test the factory coal inside. After the test is completed, the inspector can move the sample bottle 8 to the next testing location through the transportation interface 14 installed on the side of the receiving frame 16.

[0039] The internal structure design of the vacuum generator 17 has the following effects: First, the air inlet cavity 22 is a high-flow inlet. Air enters the rectangular first vacuum cavity 28 and expands vertically, achieving the initial conversion of kinetic energy into pressure energy. The vertical height of the rectangular cavity of the first vacuum cavity 28 provides expansion buffer space: the sudden diffusion of airflow causes a sudden drop in static pressure to form the first-level vacuum peak. Second, a rectangular first vacuum chamber 28 is connected in series with two identical cubic second vacuum chambers 30. The airflow passes through holes with gradually increasing diameters, causing the gas to expand step by step, reducing the flow rate but significantly improving the vacuum level. Each chamber acts as an independent Venturi tube, achieving a step-by-step increase in vacuum level. Third, the curved air guide plate 29 is designed to guide the airflow to form a vortex, strengthen the entrainment effect, so that more air is sucked into the cavity, and improve the negative pressure adsorption effect inside the pneumatic tube 11; Fourth, the design of the multi-stage vacuum chamber significantly increases the suction flow rate and accelerates the adsorption response speed.

[0040] The air inhaled by the pneumatic tube 11 is filtered through the filter 25 and the filter frame 24 and then enters the third vacuum chamber 31. Finally, it is mixed with the compressed air originally in the chamber and enters the silencer chamber. Since the fourth through hole is located on the side of the second vacuum chamber 30, the airflow is first blown onto the curved plate 12 for buffering, and finally discharged from the air outlet 18 below. Sound-absorbing cotton 15 is provided at the bottom of the curved plate 12 and the air outlet 18. The curved plate 12 in the large cavity forces the airflow to rotate, guides the airflow to rotate downward, extends the sound wave attenuation path, and cooperates with the wrapped sound-absorbing cotton 15 to greatly reduce the decibel value when the gas is discharged.

[0041] The back-blowing valve 27 is connected to the flat air bag 26, which is installed in the filter frame 24. The air outlet of the back-blowing valve 27 is connected to the outside world. The compressed air stored in the flat air bag 26 quickly releases high-pressure airflow through the back-blowing valve 27 to flush the dust on the surface of the filter 25; the air outlet of the back-blowing valve 27 is connected to the outside world for discharging back-blowing exhaust gas and balancing the system pressure, thereby increasing the service life of the filter 25.

[0042] A respirator 21 is also installed at the lower side of the sealing frame 19, which automatically inhales or exhausts air when the sealing cover device 20 opens / closes the cover, eliminating the pressure difference between the inside and outside of the inner frame 23. The air pressure balance reduces vacuum fluctuations, ensures continuous and smooth material transportation, reduces failure rate, extends equipment life, and saves energy and maintenance costs.

[0043] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An automatic sample bottle transmission structure, comprising a working frame (1), characterized in that: A transport mechanism is installed on the work frame (1), a sampling mechanism is provided on one end side of the transport mechanism, a sample bottle (8) is provided in the sampling mechanism, and a pneumatic tube (11) for transporting the sample bottle (8) is provided on one side of the sampling mechanism, and a vacuum conveying mechanism is connected to one end of the pneumatic tube (11) away from the sampling mechanism; The vacuum conveying mechanism includes a mounting frame (13) fixedly mounted on a platform on one side of the work frame (1), a receiving frame (16) fixedly mounted on the upper end surface of the mounting frame (13), a sealing frame (19) connected to the top end of the receiving frame (16), a vacuum generator (17) connected to the top end of the sealing frame (19), an inner frame (23) mounted inside the sealing frame (19), an end of the pneumatic tube (11) away from the sampling mechanism passes through the side wall of the sealing frame (19) and is communicated with the inside of the inner frame (23), and a discharge mechanism is provided at the lower end of the inner frame (23); The vacuum generator (17) is provided with a plurality of cavities inside, including a linearly arranged air inlet cavity (22), a first vacuum cavity (28), two adjacent second vacuum cavities (30), a silencer cavity, and a third vacuum cavity (31) arranged below the air inlet cavity (22), the first vacuum cavity (28) and the second vacuum cavity (30). The air inlet cavity (22) is provided with a pipe interface at one end away from the first vacuum cavity (28). The third vacuum cavity (31) is connected to the inner frame (23). External compressed gas enters the air inlet cavity (22) through the pipe interface and is finally discharged through the silencer cavity. In this process, negative pressure is generated inside the inner frame (23).

2. The automatic sample bottle transport structure according to claim 1, characterized in that: The working frame (1) is divided into two layers, the upper and lower layers. The transport mechanism includes a plant coal conveyor (2) fixedly installed on the upper layer of the working frame (1) and a plant coal filter (4) fixedly installed on the lower layer of the working frame (1). The output end of the plant coal conveyor (2) is fixedly installed with a first transport frame (3). The input end of the plant coal filter (4) is located directly below the first transport frame (3). The output end of the plant coal filter (4) is fixedly installed with a second transport frame (9). A hoist (10) is provided on one side of the second transport frame (9). The discharge port of the second transport frame (9) is connected to the feed port of the hoist (10).

3. The automatic sample bottle transport structure according to claim 2, characterized in that: The sampling mechanism comprises a sampling device (6) fixedly mounted on one side of the tail end of the factory coal filter (4); the sampling device (6) is driven by a driving motor (5) fixedly mounted on the factory coal filter (4); the driving motor (5) drives a sampling shovel inside the sampling device (6) to rotate at a constant speed; a rotating device (7) is provided below one side of the sampling device (6); a plurality of sample bottles (8) are mounted on the working end of the rotating device (7); the rotating device (7) drives the plurality of sample bottles (8) to rotate at a fixed time; and an output end of the sampling device (6) is located directly above one of the sample bottles (8).

4. The automatic sample bottle transport structure according to claim 1, characterized in that: The discharging mechanism includes a rotatable sealing cover installed at the lower end outlet of the inner frame (23), a sealing cover device (20) for driving the sealing cover to open and close is fixedly installed on one side of the sealing frame (19), and a motor in the sealing cover device (20) opens the sealing cover through a force arm, and a transport interface (14) is connected to the side of the receiving frame (16).

5. The automatic sample bottle transport structure according to claim 4, characterized in that: A respirator (21) is fixedly mounted below the side of the sealing frame (19), and a working end of the respirator (21) is located in the inner frame (23). When the sealing cover device (20) opens or closes the cover, the respirator automatically inhales or discharges air, thereby eliminating the pressure difference between the inside and outside of the inner frame (23).

6. The automatic sample bottle transport structure according to claim 1, characterized in that: The air inlet chamber (22) is designed in a cube shape and its right side is connected to the first vacuum chamber (28) through a first through hole. The first vacuum chamber (28) is designed in a vertical rectangular shape. The right side of the first vacuum chamber (28) is connected to the adjacent second vacuum chamber (30) through a second through hole, and the bottom is connected to the third vacuum chamber (31) through an air outlet. The second vacuum chamber (30) is designed in a cube shape and is larger than the air inlet chamber (22). The two second vacuum chambers (30) are connected through the third through hole, and the lower ends of the two second vacuum chambers (30) are connected to the third vacuum chamber (31) through the air outlet. A curved air guide plate (29) is fixedly installed on the left side of the interior of the second vacuum chamber (30). The air guide plate (29) is located below the second or third through hole. The second vacuum chamber (30) adjacent to the silencer chamber is connected to the silencer chamber through a fourth through hole. The apertures of the first to fourth through holes gradually increase.

7. The automatic sample bottle transport structure according to claim 1, characterized in that: The muffler cavity is composed of a curved plate (12), sound-absorbing cotton (15) and an air outlet (18). The curved plate (12) is fixedly installed on the right side of the muffler cavity, and the air outlet (18) is opened below the muffler cavity. Sound-absorbing cotton (15) is attached to the surface of the curved plate (12) and the bottom of the air outlet (18).

8. The automatic sample bottle transport structure according to claim 1, characterized in that: A filtering mechanism is provided between the vacuum generator (17) and the inner frame (23), the filtering mechanism comprising a filter (25) detachably mounted in the inner frame (23), the lower end of the filter (25) being hollowed out, a filter frame (24) being provided at the top end of the filter (25), the filter frame (24) being in communication with the third vacuum chamber (31), and a cleaning mechanism being provided inside the filter frame (24).

9. The automatic sample bottle transport structure according to claim 8, characterized in that: The cleaning mechanism comprises a flat air bag (26) installed on one side of the interior of the filter frame (24), wherein compressed air is stored in the flat air bag (26), and a back-blowing valve (27) is connected to one side of the flat air bag (26), wherein an air outlet of the back-blowing valve (27) is connected to the outside, and the back-blowing valve (27) releases a high-pressure airflow to flush the surface of the filter (25).

10. The factory coal acceptance system is characterized by: include: The automatic sample bottle transport structure according to any one of claims 1 to 9.

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