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

Abstract

The present application relates to sample bottle transmission technical field, especially automatic sample bottle transmission structure and contain the factory coal acceptance system of mechanism, including work frame, the work frame is installed with transport mechanism, the end side of transport mechanism is equipped with sampling mechanism, the sampling mechanism is equipped with sample bottle, and the sampling mechanism side is equipped with the pneumatic pipe that transports sample bottle, the end of pneumatic pipe is connected with vacuum conveying mechanism away from sampling mechanism, the present application is integrated in automation sampling, vacuum conveying, multistage pressurization, noise reduction, filter ash and air pressure balance, realizes the high efficiency, stable, low noise factory coal sample bottle transportation and detection process, its multi-cavity vacuum structure and flow field optimization significantly improves suction and stability, filtration and back blow technology reduces maintenance cost, whole machine operation is continuous reliable, adapts high strength industrial use demand.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sample bottle transmission, in particular to an automatic sample bottle transmission structure and a coal plant acceptance system comprising the same. BACKGROUND

[0002] The existing coal plant sampling and transportation system relies on manual cooperation or single mechanical device to complete, and there are many process links from coal mine operation to sampling in the plant, sample bottle filling and sending to the laboratory, which has low automation degree and efficiency, and the sampling process is easily affected by human factors, resulting in insufficient sample representativeness. The workers not only have high labor intensity in repeated operation, but also may further reduce the sample quality due to the deviation of operation standard execution, thereby increasing the error risk of subsequent detection results.

[0003] The traditional vacuum conveying device generally adopts single-stage or simple vacuum cavity structure, and the vacuum degree is unstable, the suction force is insufficient, and the sample bottle is prone to speed fluctuation or even stagnation during running in the pneumatic pipe, thereby affecting the detection efficiency. When the sample bottle is stagnant, manual intervention is required to dredge the pipeline, further prolonging the sample turnover time, and it is difficult to meet the demand of modern coal mine rapid detection.

[0004] In addition, the existing pneumatic conveying system has large noise during high-speed exhaust, and the influence on the working environment is obvious after long-time operation, and the airflow impact is not effectively buffered, which is easy to cause equipment vibration and part fatigue. The continuous noise pollution will affect the working state and health of the operators, and the equipment vibration may accelerate the wear of the pipeline connection, increase the maintenance cost and fault shutdown probability. SUMMARY

[0005] The purpose of the present application is to solve the above-mentioned shortcomings in the prior art, and an automatic sample bottle transmission structure and a coal plant acceptance system comprising the same are provided.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0007] The automatic sample bottle transmission structure comprises a working frame, a conveying mechanism is installed on the working frame, a sampling mechanism is arranged on one side of the end of the conveying mechanism, a sample bottle is arranged in the sampling mechanism, a pneumatic pipe for conveying the sample bottle is arranged on one side of the sampling mechanism, and a vacuum conveying mechanism is connected to one end of the pneumatic pipe away from the sampling mechanism.

[0008] The vacuum conveying mechanism comprises a mounting frame fixedly installed on one side platform of the working frame, a receiving frame is fixedly installed on the upper end surface of the mounting frame, a sealing frame is connected to the top end of the receiving frame, a vacuum generator is connected to the top end of the sealing frame, an inner frame is installed in the sealing frame, the end of the pneumatic pipe away from the sampling mechanism is in communication with the inner frame after penetrating through the side wall of the sealing frame, and a discharging mechanism is arranged at the lower end of the inner frame.

[0009] The vacuum generator is internally provided with multiple cavities, including an air inlet cavity, a first vacuum cavity, two adjacent second vacuum cavities, a sound absorption cavity, and a third vacuum cavity arranged below the air inlet cavity, the first vacuum cavity and the second vacuum cavities, the air inlet cavity is provided with a pipeline interface at one end away from the first vacuum cavity, the third vacuum cavity is in communication with the inner frame, and the compressed gas from the outside enters the air inlet cavity through the pipeline interface and is finally discharged through the sound absorption cavity, so that a negative pressure is generated in the inner frame during the process.

[0010] Preferably, the workbench is divided into two layers, the conveying mechanism includes a plant coal conveying machine fixedly installed on the upper layer of the workbench and a plant coal filtering machine fixedly installed on the lower layer of the workbench, the output end of the plant coal conveying machine is fixedly installed with a first conveying frame, the input end of the plant coal filtering machine is located directly below the first conveying frame, the output end of the plant coal filtering machine is fixedly installed with a second conveying frame, one side of the second conveying frame is provided with an elevator, and the discharge port of the second conveying frame is connected to the feeding port of the elevator.

[0011] Preferably, the sampling mechanism includes a sampling device fixedly installed on one side of the tail end of the plant coal filtering machine, the sampling device is driven by a driving motor fixedly installed on the plant coal filtering machine, the driving motor drives the sampling shovel in the sampling device to rotate at a constant speed, a rotating device is arranged below one side of the sampling device, a plurality of sample bottles are installed on the working end of the rotating device, the rotating device drives the plurality of sample bottles to rotate at a constant time, and the output end of the sampling device is located directly above one of the sample bottles.

[0012] Preferably, the discharging mechanism includes a seal cover rotatably arranged at the lower end outlet of the inner frame, a seal cover device is fixedly installed on one side of the seal cover and used for driving the seal cover to open and close, a motor in the seal cover device drives the seal cover to open through a force arm, and a conveying interface is connected to the side surface of the receiving frame.

[0013] Preferably, a respirator is fixedly installed below the side surface of the seal frame, and the working end of the respirator is located in the inner frame, so that air is automatically sucked in or discharged when the seal cover device opens or closes the cover, and the pressure difference between the inside and outside of the inner frame is eliminated.

[0014] Preferably, the air inlet cavity is cuboid in design, and the right side thereof is communicated with the first vacuum cavity through a first through hole; the first vacuum cavity is vertically long in design; the right side of the first vacuum cavity is communicated with the adjacent second vacuum cavity through a second through hole, and the lower side is communicated with the third vacuum cavity through an air outlet hole; the second vacuum cavity is cuboid in design and larger in size than the air inlet cavity; the two second vacuum cavities are communicated with each other through a third through hole, and the lower ends of the two second vacuum cavities are communicated with the third vacuum cavity through air outlet holes; a curved air baffle is fixedly installed on the left side in the second vacuum cavity; the second vacuum cavity adjacent to the sound attenuation cavity is communicated with the sound attenuation cavity through a fourth through hole; and the diameters of the first through fourth through holes gradually increase.

[0015] Preferably, the sound attenuation cavity is composed of a curved baffle, sound absorption cotton and an air outlet; the curved baffle is fixedly installed on the right side of the sound attenuation cavity; the air outlet is arranged on the lower side of the sound attenuation cavity; and the surface of the curved baffle and the bottom of the air outlet are attached with the sound absorption cotton.

[0016] Preferably, a filter mechanism is arranged between the vacuum generator and the inner frame; the filter mechanism comprises a filter detachably installed in the inner frame; the lower end of the filter is hollow in design; a filter frame is arranged at the top end of the filter; the filter frame is communicated with the third vacuum cavity; and a cleaning mechanism is arranged in the filter frame.

[0017] Preferably, the cleaning mechanism comprises a flat air bag installed on one side in the filter frame; the flat air bag stores compressed air; a back flushing valve is connected to one side of the flat air bag; the air outlet of the back flushing valve is communicated with the outside; and the back flushing valve releases high-pressure air flow to flush the surface of the filter.

[0018] Compared with the prior art, the application has the following advantages:

[0019] 1. The application realizes the full-process automation of plant coal from transportation, filtration, sampling to sample bottle filling through the coal transportation machine, the transportation frame, the filter and the sampling device controlled by the driving motor; the rotating device automatically replaces empty bottles, reduces manual intervention, improves sampling efficiency and consistency; the pneumatic pipe and the vacuum generator are linked to quickly send the sample bottle to the testing room, thereby saving the manual handling link, shortening the sampling to detection time and improving the detection timeliness and production continuity.

[0020] 2. The application adopts the series structure of the air inlet cavity, the first vacuum cavity and multiple second vacuum cavities in the vacuum generator, cooperates with the gradually expanding through hole and the vertical expansion design to form the stepped vacuum enhancement; the curved air baffle generates the vortex suction effect to improve the negative pressure in the pneumatic pipe and enhance the adsorption and transportation capacity of the sample bottle. The multi-stage vacuum peak value is superimposed to ensure the fast transportation speed and high vacuum stability.

[0021] 3、The air flow of the application is guided to rotate downward before entering the sound attenuation cavity through the arc plate, prolonging the sound wave attenuation path, combining with the sound-absorbing cotton material, significantly reducing the gas emission noise, and improving the working environment; the large cavity cooperates with the air guide structure, not only reduces the noise, but also stabilizes the airflow delivery trajectory, ensures the smooth operation and safety of the material in the vacuum transmission process.

[0022] 4、After the pneumatic pipe inhales air, the filter and the filter frame double-filter to block dust and impurities from entering the vacuum system; the backflush valve cooperates with the flat air pocket to quickly remove dust by high-pressure airflow flushing the filter surface, prolonging the filter life, reducing maintenance frequency and replacement cost; the backflush exhaust design can balance the system pressure to avoid equipment damage caused by excessive pressure difference.

[0023] 5、The breather on the side of the sealing frame automatically inhales and exhausts air during the opening and closing of the cover, eliminating the internal and external pressure difference, avoiding the influence of vacuum fluctuation on the conveying efficiency; air pressure balance reduces the stop and impact of the material during the conveying process, ensures the long-term stable operation of the equipment, reduces energy consumption and part wear rate, and improves the reliability and service life of the overall system.

[0024] In summary, the application integrates automatic sampling, vacuum conveying, multi-stage pressurization, noise reduction, filtration and dust removal, and air pressure balance, realizes efficient, stable and low-noise coal sample bottle conveying and detection process; the multi-cavity vacuum structure and flow field optimization significantly improve the suction force and stability, the filtration and backflush technology reduces the maintenance cost, the whole machine runs continuously and reliably, and meets the high-strength industrial use requirements. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The overall isometric structure diagram of the automatic sample bottle conveying structure proposed by the application.

[0026] Figure 2 The driving motor and sampling device structure diagram of the automatic sample bottle conveying structure proposed by the application.

[0027] Figure 3 The sample bottle and rotating device structure diagram of the automatic sample bottle conveying structure proposed by the application.

[0028] Figure 4 The pneumatic pipe and mounting bracket structure diagram of the automatic sample bottle conveying structure proposed by the application.

[0029] Figure 5 The receiving frame and conveying interface structure diagram of the automatic sample bottle conveying structure proposed by the application.

[0030] Figure 6 The breather and sealing cover device structure diagram of the automatic sample bottle conveying structure proposed by the application.

[0031] Figure 7 The schematic diagram of the inner frame structure of the automatic sample bottle conveying structure provided by the present application.

[0032] In the figure: 1 working frame, 2 plant coal running machine, 3 first conveying frame, 4 plant coal filter machine, 5 driving motor, 6 sampling device, 7 rotating device, 8 sample bottle, 9 second conveying frame, 10 elevator, 11 pneumatic pipe, 12 arc bending plate, 13 mounting frame, 14 conveying 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 cavity, 23 inner frame, 24 filter frame, 25 filter, 26 flat air bag, 27 back flushing valve, 28 first vacuum cavity, 29 air guide plate, 30 second vacuum cavity, 31 third vacuum cavity. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments.

[0034] Reference Figures 1 to 7 The automatic sample bottle conveying structure and the plant coal acceptance system comprising the same include a working frame 1. The working frame 1 is divided into two layers, an upper layer and a lower layer. The upper layer is fixedly installed with a plant coal running machine 2, and the lower layer is fixedly installed with a plant coal filter machine 4. The plant coal running machine 2 and the plant coal filter machine 4 are both prior art, and the specific structural design of the two will not be described in detail here. The output end of the plant coal running machine 2 is fixedly installed with a first conveying frame 3, and the input end of the plant coal filter machine 4 is located just below the first conveying frame 3, so that the plant coal in the first conveying frame 3 can just fall into the plant coal filter machine 4 for impurity filtering and further conveying.

[0035] The tail end of the plant coal filter machine 4 is fixedly installed with a sampling device 6. The sampling device 6 is driven by a driving motor 5 fixedly installed on the plant coal filter machine 4. The driving motor 5 drives the sampling shovel inside the sampling device 6 to rotate at a constant speed. The sampling device 6 is provided with a rotating device 7 below one side. The working end of the rotating device 7 is installed with a plurality of sample bottles 8. The rotating device 7 drives the plurality of sample bottles 8 to rotate regularly. 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 scooped plant coal into the sample bottle 8 below through the outer frame of the sampling device 6 to complete sampling. The output end of the plant coal filter machine 4 is fixedly installed with a second conveying frame 9. The second conveying frame 9 is provided with an elevator 10 on one side. The discharge port of the second conveying frame 9 is connected to the inlet of the elevator 10, so that the plant coal that has not been sampled can be conveyed to the elevator 10 through the second conveying frame 9, and then transferred to the next processing link.

[0036] The pneumatic pipe 11 is detachably installed on the side wall of the elevator 10, and the lower end of the pneumatic pipe 11 is located at one side of the rotating device 7, so that the worker can put the sample bottle 8 filled with coal into the pneumatic pipe 11, and the end of the pneumatic pipe 11 away from the rotating device 7 is connected with a vacuum conveying mechanism, which comprises a mounting frame 13 fixedly installed on the platform on one side of the working stand 1, and the upper end surface of the mounting frame 13 is fixedly installed with a receiving frame 16, the top end of the receiving frame 16 is connected with a sealing frame 19, the top end of the sealing frame 19 is connected with a vacuum generator 17, and the inside of the sealing frame 19 is installed with an inner frame 23, and the end of the pneumatic pipe 11 away from the rotating device 7 is in communication with the inside of the inner frame 23 after penetrating through the side wall of the sealing frame 19, so that the sample bottle 8 in the pneumatic pipe 11 is moved into the inner frame 23, and the lower end outlet of the inner frame 23 is installed with a rotatable sealing cover, and the sealing frame 19 is fixedly installed with a sealing cover device 20 for driving the sealing cover to open and close, and 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, and the worker can take out the sample bottle 8 to detect the coal in the sample bottle 8, and the side of the receiving frame 16 is connected with a transportation interface 14, and the sample bottle 8 is moved to the next detection site through the transportation interface 14.

[0037] The breathing apparatus 21 is fixedly installed below the side of the sealing frame 19, and the working end of the breathing apparatus 21 is located in the inner frame 23, and the breathing apparatus 21 automatically inhales or exhausts air when the sealing cover device 20 opens or closes the cover, so as to eliminate the pressure difference between the inside and outside of the inner frame 23, reduce the vacuum fluctuation in the inner frame 23, ensure the continuous and smooth material conveying, and reduce the failure rate.

[0038] The vacuum generator 17 is internally provided with a plurality of cavities, including an air inlet cavity 22 arranged in a linear manner, a first vacuum cavity 28, two adjacent second vacuum cavities 30, a sound attenuation cavity, and a third vacuum cavity 31 arranged below the air inlet cavity 22, the first vacuum cavity 28 and the second vacuum cavities 30, one end of the air inlet cavity 22 away from the first vacuum cavity 28 is provided with a pipeline interface, compressed gas in the outside world enters the air inlet cavity 22 through the pipeline interface, the air inlet cavity 22 is designed in a cuboid shape and is in communication with the first vacuum cavity 28 through a first through hole on the right side, the first vacuum cavity 28 is designed in a vertical rectangular cuboid shape, the right side of the first vacuum cavity 28 is in communication with the adjacent second vacuum cavity 30 through a second through hole, and the lower side is in communication with the third vacuum cavity 31 through an air outlet hole, the second vacuum cavity 30 is also designed in a cuboid shape but has a larger size than the air inlet cavity 22, the two second vacuum cavities 30 are in communication through a third through hole, and the lower ends of the two second vacuum cavities 30 are in communication with the third vacuum cavity 31 through air outlet holes, a curved air baffle 29 is fixedly installed on the left side in the second vacuum cavity 30, the air baffle 29 is located below the second or third through hole and is adjacent to the sound attenuation cavity, the second vacuum cavity 30 adjacent to the sound attenuation cavity is in communication with the sound attenuation cavity through a fourth through hole, and the diameters of the first to fourth through holes gradually increase.

[0039] The sound absorbing cavity is composed of the arc bending plate 12, the sound absorbing cotton 15 and the air outlet 18, the arc bending plate 12 is fixedly installed on the right side of the sound absorbing cavity, the air outlet 18 is arranged on the lower side of the sound absorbing cavity, and the surface of the arc bending plate 12 and the bottom of the air outlet 18 are attached with the sound absorbing cotton 15, the arc bending plate 12 is used for forcibly rotating the airflow, guiding the airflow to rotate downward, prolonging the sound wave attenuation path, and cooperating with the wrapped sound absorbing cotton 15, so that the decibel value of the gas discharge is greatly reduced.

[0040] The filter mechanism is arranged between the vacuum generator 17 and the inner frame 23, the filter mechanism comprises a filter 25 which is detachably installed in the inner frame 23, the lower end of the filter 25 is designed as a hollow design, so that the gas in the inner frame 23 can flow upward after being filtered by the filter 25, the top end of the filter 25 is provided with a filter frame 24, the filter frame 24 is in communication with the third vacuum cavity 31, a flat air bag 26 is installed on one side of the inside of the filter frame 24, the flat air bag 26 stores compressed air, the flat air bag 26 is connected with a back flushing valve 27 on one side, the gas outlet of the back flushing valve 27 is communicated with the outside, the high-pressure airflow released through the back flushing valve 27 can flush the dust on the surface of the filter 25, and the gas outlet of the back flushing valve 27 is communicated with the outside, which is used for discharging back flushing waste gas and balancing the system pressure, so as to improve the service life of the filter 25.

[0041] In the working process of the application, the worker performs relevant operation work through the working frame 1, and uses the factory coal conveying machine 2 to convey the coal mine outside to the factory, the factory coal conveyed in is moved to the factory coal filter 4 through the first conveying frame 3, impurity filtering and further conveying are performed, at the tail of the factory coal filter 4, the sampling device 6 driven by the driving motor 5 is installed, the driving motor 5 drives the sampling shovel in the sampling device 6 to rotate at a constant speed, the sampling shovel fills the factory coal shoveled into the sample bottle 8 below through the outer frame of the sampling device 6, the sample bottle 8 is installed in the rotating device 7, after one sample bottle 8 is filled, the rotating device 7 rotates once, the empty sample bottle 8 is aligned below the output end of the sampling device 6, and the next sampling is performed, the factory coal not sampled is conveyed to the elevator 10 through the second conveying frame 9 and is transferred to the next processing link.

[0042] The worker puts the sample bottle 8 filled with coal into the pneumatic pipe 11, starts the vacuum generator 17, and the compressed gas enters through the pipeline interface on the side of the air inlet cavity 22, and is discharged through the air outlet 18 after sequentially passing through the air inlet cavity 22, the first vacuum cavity 28 and the second vacuum cavity 30, so that the inside of the pneumatic pipe 11 is in a negative pressure environment. Under the action of atmospheric pressure, the gas in the inner frame 23 enters the second vacuum cavity 30 through the third vacuum cavity 31 and is discharged, so that the inner frame 23 is in a negative pressure state, thereby generating an attractive force on the sample bottle 8, and the sample bottle 8 moves in the pneumatic pipe 11. The sample bottle 8 enters the sealed 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, so that the sample bottle 8 falls into the receiving frame 16. The inspector can take out the sample bottle 8 and detect the internal coal. After the detection is completed, the inspector can move the sample bottle 8 to the next detection site through the transportation interface 14 installed on the side of the receiving frame 16.

[0043] Through the internal structure design of the vacuum generator 17, the following effects are achieved:

[0044] First, the air inlet cavity 22 is a high-flow inlet, which enters the rectangular first vacuum cavity 28 to expand vertically, achieving the initial conversion of kinetic energy to pressure energy. The vertical height of the rectangular cavity of the first vacuum cavity 28 provides an expansion buffer space: the sudden diffusion of the airflow causes a sudden drop in static pressure, forming a first-stage vacuum peak.

[0045] Second, the rectangular first vacuum cavity 28 is connected in series with two identical square second vacuum cavities 30. The airflow passes through the through holes with gradually increasing diameters, so that the gas expands step by step, and the flow rate decreases but the vacuum degree significantly increases. Each cavity is equivalent to an independent Venturi tube, achieving stepwise enhancement of the vacuum degree.

[0046] Third, the curved air deflector 29 is designed to guide the airflow to form a vortex, strengthen the suction effect, and make more air be sucked into the cavity, thereby improving the negative pressure adsorption effect inside the pneumatic pipe 11.

[0047] Fourth, the design of multiple vacuum cavities significantly increases the suction flow rate and speeds up the adsorption response speed.

[0048] The air sucked by the pneumatic pipe 11 is filtered by the filter 25 and the filtering frame 24, and then enters the third vacuum cavity 31, and finally mixes with the compressed air in the cavity and enters the sound attenuation cavity. Since the fourth through hole is located at the side of the second vacuum cavity 30, the airflow first blows on the curved arc plate 12 for buffering, and finally is discharged from the air outlet 18 below. The curved arc plate 12 and the bottom of the air outlet 18 are both provided with the sound absorbing cotton 15. The curved arc plate 12 in the large cavity forces the airflow to rotate, guides the airflow to rotate downward, prolongs the sound wave attenuation path, and greatly reduces the decibel value when the gas is discharged in cooperation with the wrapped sound absorbing cotton 15.

[0049] The back flushing valve 27 is connected with the flat air bag 26, the flat air bag 26 is installed in the filtering frame 24, the air outlet of the back flushing valve 27 is communicated with the outside, the compressed air stored in the flat air bag 26 is quickly released through the back flushing valve 27 to flush the dust on the surface of the filter 25; the air outlet of the back flushing valve 27 is communicated with the outside, which is used for discharging back flushing waste gas and balancing the system pressure, and improving the service life of the filter 25.

[0050] The breather 21 is also installed below the side of the sealing frame 19, and automatically inhales or discharges air when the sealing cover device 20 opens / closes the cover, eliminates the pressure difference between the inside and outside of the inner frame 23, balances the air pressure, reduces the vacuum fluctuation, ensures the continuous and smooth material conveying, reduces the failure rate, prolongs the service life of the equipment, and saves energy and maintenance cost.

[0051] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An automatic sample bottle transfer structure, comprising a work rack (1), characterized in that, The work frame (1) is equipped with a transport mechanism. A sampling mechanism is provided on one side of the end of the transport mechanism. A sample bottle (8) is provided in the sampling mechanism. A pneumatic tube (11) for transporting the sample bottle (8) is provided on one side of the sampling mechanism. A vacuum conveying mechanism is connected to the end of the pneumatic tube (11) away from the sampling mechanism. The vacuum conveying mechanism includes a mounting frame (13) fixedly installed on a platform on one side of the work frame (1). A receiving frame (16) is fixedly installed on the upper surface of the mounting frame (13). A sealing frame (19) is connected to the top of the receiving frame (16). A vacuum generator (17) is connected to the top of the sealing frame (19). An inner frame (23) is installed inside the sealing frame (19). The end of the pneumatic tube (11) away from the sampling mechanism communicates with the inside of the inner frame (23) after penetrating the side wall of the sealing frame (19). A discharge mechanism is provided at the lower end of the inner frame (23). The vacuum generator (17) has multiple cavities inside, including an air inlet cavity (22), a first vacuum cavity (28), two adjacent second vacuum cavities (30), a silencer cavity, and a third vacuum cavity (31) located below the air inlet cavity (22), the first vacuum cavity (28), and the second vacuum cavity (30). The end of the air inlet cavity (22) away from the first vacuum cavity (28) is provided with a pipe interface. The third vacuum cavity (31) is connected to the inner frame (23). Compressed gas from the outside enters the air inlet cavity (22) through the pipe interface and is finally discharged through the silencer cavity. During this process, negative pressure is generated inside the inner frame (23).

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

3. The automatic sample bottle transfer structure according to claim 2, characterized in that, The sampling mechanism includes a sampling device (6) fixedly installed on one side of the tail end of the coal filter (4). The sampling device (6) is driven by a drive motor (5) fixedly installed on the 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). Multiple sample bottles (8) are installed at the working end of the rotating device (7). The rotating device (7) drives multiple sample bottles (8) to rotate at a time. The output end of the sampling device (6) is located directly above one of the sample bottles (8).

4. The automatic sample bottle transfer structure according to claim 1, characterized in that, The discharge mechanism includes a rotatable sealing cover installed at the lower 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) opens the sealing cover through a lever arm. A transport interface (14) is connected to the side of the receiving frame (16).

5. The automatic sample bottle transfer structure according to claim 4, characterized in that, A respirator (21) is fixedly installed on 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 draws in or discharges air to eliminate the pressure difference between the inside and outside of the inner frame (23).

6. The automatic sample bottle transfer structure according to claim 1, characterized in that, The air inlet cavity (22) is designed in a cubic shape and its right side is connected to the first vacuum cavity (28) through the first through hole. The first vacuum cavity (28) is designed in a vertical cuboid shape. The right side of the first vacuum cavity (28) is connected to the adjacent second vacuum cavity (30) through the second through hole, and the bottom is connected to the third vacuum cavity (31) through the air outlet. The second vacuum cavity (30) is designed in a cubic shape and its size is larger than that of the air inlet cavity (22). The two second vacuum cavities (30) are connected to each other through the third through hole, and the lower ends of the two second vacuum cavities (30) are connected to the third vacuum cavity (31) through the air outlet. A curved air guide plate (29) is fixedly installed on the left side inside the second vacuum cavity (30). The air guide plate (29) is located below the second or third through hole. The second vacuum cavity (30) adjacent to the silencing cavity is connected to the silencing cavity through the fourth through hole. The diameter of the first to the fourth through holes gradually increases.

7. The automatic sample bottle transfer structure according to claim 1, characterized in that, The silencing 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 silencing cavity, and the air outlet (18) is opened below the silencing cavity. The surface of the curved plate (12) and the bottom of the air outlet (18) are both covered with sound-absorbing cotton (15).

8. The automatic sample bottle transfer structure according to claim 1, characterized in that, A filter mechanism is provided between the vacuum generator (17) and the inner frame (23). The filter mechanism includes a filter (25) that is detachably installed in the inner frame (23). The lower end of the filter (25) is hollowed out. 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), and a cleaning mechanism is provided inside the filter frame (24).

9. The automatic sample bottle transfer structure according to claim 8, characterized in that, The cleaning mechanism includes a flat air bag (26) installed inside one side of the filter frame (24). The flat air bag (26) stores compressed air. A backflush valve (27) is connected to one side of the flat air bag (26). The outlet of the backflush valve (27) is connected to the outside, and the backflush valve (27) releases high-pressure airflow to flush the surface of the filter (25).

10. A coal acceptance system for industrial plants, characterized in that, include: The automatic sample bottle transfer structure according to any one of claims 1-9.

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