Sample collection equipment for detection and analysis based on coal safety monitoring

Abstract

The invention relates to the technical field of coal environment detection and sampling, and discloses sample collection equipment for detection and analysis based on coal safety monitoring. Comprising a sampling vehicle, a bidirectional air blower and a pipeline valve assembly which are arranged above the sampling vehicle, a sample storage mechanism arranged in the middle of the pipeline valve assembly, and a ground sampling mechanism arranged in the sampling vehicle. Dust-containing air is sucked in through an air dust sampling head connected with an air sampling pipeline, the dust-containing air reaches a first communicating pipe through a penetrating opening, after air dust sampling is completed, a lifting motor is operated to form switching, and during ground dust sampling, a two-way air blower is reversely operated, so that the dust sampling efficiency is improved. Dust-containing air in the ground dust sampling frame is sucked into the second communicating pipe through the dust collection extension frame and the ground sampling pipeline, so that the effects of improving the sampling efficiency and comprehensively detecting are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of coal environment detection and sampling, and in particular to a sample collection device for detection and analysis based on coal safety monitoring. Background Art

[0002] The sample collection equipment in coal safety monitoring is mainly used for the collection and analysis of gas, dust and other samples in the coal mine working environment, so as to monitor the concentration of harmful gases and dust content in the mine and find safety hazards in time. This equipment integrates functions such as automatic sampling, sample preservation, and data transmission. It can work stably for a long time in harsh environments, providing a scientific basis for coal mine safety management and accident prevention.

[0003] The prior art has the following defects:

[0004] It is impossible to sample the dust in the air and on the ground at the coal environment sampling point at the same time: the existing equipment can only collect dust in the air or dust on the ground separately, but not at the same time. Therefore, it is necessary to sample the air and ground dust at the coal environment sampling point at different time points, which makes the whole monitoring cycle longer and causes the data collection time of air and ground dust to be out of sync, affecting the comprehensive analysis and judgment of the environmental conditions. Therefore, it is necessary to set up a device for simultaneously sampling the air and ground dust at the same coal environment sampling point to ensure the synchronous collection of air and ground dust data, enhance the accuracy and reliability of the data, provide more comprehensive environmental monitoring data, support more accurate comprehensive analysis and decision-making, and achieve the effect of improving sampling efficiency and simplifying sampling operations.

[0005] It is impossible to sample multiple coal environment sampling points in series: the existing settings can only sample a single sampling point. For multiple sampling points, each sampling point needs to be visited one by one and sampling operations need to be performed one by one, which increases working time and labor costs, and requires frequent replacement of sampling equipment or adjustment of settings, which increases operational difficulty and workload. Therefore, it is necessary to set up a structure that can store multiple samples and switch them through control to sample multiple coal environment sampling points in series, reduce the frequency of equipment replacement and adjustment, simplify the sampling process, reduce operational difficulty, and achieve the effect of improving sampling efficiency and comprehensive detection. Summary of the invention

[0006] In view of the problems in the existing technology such as the inability to simultaneously sample the air and dust on the ground at the coal environment sampling point and the inability to sample multiple coal environment sampling points in series, a sample collection device for detection and analysis based on coal safety monitoring is proposed.

[0007] The present application provides a sample collection device for detection and analysis based on coal safety monitoring, the purpose of which is to ensure the synchronous collection of air and ground dust data at the same sampling point through the set pipeline valve assembly and ground sampling mechanism, enhance the accuracy and reliability of the data, provide more comprehensive environmental monitoring data, support more accurate comprehensive analysis and decision-making, and achieve the effect of improving sampling efficiency and simplifying sampling operations. Through the set sample storage mechanism, multiple samples can be stored and switched through control to sample multiple coal environment sampling points in series, reduce the frequency of equipment replacement and adjustment, simplify the sampling process, reduce the difficulty of operation, and achieve the effect of improving sampling efficiency and comprehensive detection.

[0008] The technical solution of the present invention is: a sample collection device for detection and analysis based on coal safety monitoring, comprising a sampling vehicle, a two-way blower and a pipeline valve assembly arranged above the sampling vehicle, a sample storage mechanism arranged in the middle of the pipeline valve assembly, a ground sampling mechanism arranged inside the sampling vehicle, and a dust filter plate fixedly installed inside the pipeline valve assembly, the sample storage mechanism and the ground sampling mechanism, the sample storage mechanism comprising a sample storage outer frame assembly fixedly installed on the outer wall of the sampling vehicle, a lifting motor is arranged inside the sample storage outer frame assembly, the output shaft sleeve of the lifting motor is provided with a lifting threaded rod, and the outer wall of the lifting threaded rod is threadedly connected with a plurality of sample storage ventilation assemblies arranged equidistantly;

[0009] The sample storage and ventilation assembly includes a connecting frame threadedly connected to the outer wall of the lifting threaded rod, and a first connecting pipe and a second connecting pipe are fixedly connected on both sides of the connecting frame, an activated carbon adsorption block and two dust filter plates are fixedly installed on the inner wall of one of the first connecting pipes, and the activated carbon adsorption block is arranged between the two dust filter plates, and a dust filter plate is fixedly installed on the inner wall of one of the second connecting pipes, and the sample storage and ventilation assembly containing the activated carbon adsorption block and two dust filter plates and the sample storage and ventilation assembly containing a single dust filter plate are alternately threadedly connected to the outer wall of the lifting threaded rod.

[0010] Furthermore, both ends of the first connecting tube and the second connecting tube are slidably connected with sealing rings, and a plurality of telescopic springs are fixedly connected between the inner walls of the first connecting tube and the second connecting tube and the sealing rings.

[0011] By adopting the above scheme, through the set sample storage and ventilation assembly, when air dust sampling is performed, the two-way blower is operated in the forward direction, and the dust-containing air is sucked in through the air dust sampling head connected to the air sampling pipe, and the dust-containing air reaches the first connecting pipe through the penetration port, wherein the dust is intercepted by the dust filter plate close to the air dust sampling head, and the harmful gas is adsorbed by the activated carbon adsorption block. After the air dust sampling is completed, the lifting motor is operated, and the output shaft of the lifting motor drives the connecting frame to rise through the lifting threaded rod, so that the sample storage and ventilation assembly containing a single dust filter plate is aligned with the penetration port to form a switch. When ground dust sampling is performed, the two-way blower is operated in the reverse direction, and the dust-containing air in the ground dust sampling frame is sucked into the second connecting pipe through the dust suction extension frame and the ground sampling pipe, and is intercepted by the dust filter plate. After the ground dust sampling is completed, it is switched again, and multiple coal environment sampling points are sampled in series, so as to achieve the effect of improving sampling efficiency and comprehensive detection.

[0012] Furthermore, the sample storage outer frame assembly includes a sealing frame fixedly mounted on the outer wall of the sampling vehicle, a top cover is hinged on the top of the sealing frame, and an inner wall of the sealing frame is fixedly connected to the bottom of the lifting motor.

[0013] Furthermore, the outer wall of the sealing frame is provided with a plurality of through openings, the inner walls of the plurality of through openings are fixedly connected with sealing slots, and the inner walls of the sealing slots are snap-fitted with the outer wall of the sealing ring.

[0014] By adopting the above scheme, through the sample storage outer frame assembly, when the sample storage ventilation assembly is switched, the sealing ring will be inserted into the sealing groove through the telescopic spring to seal, thereby playing the role of sealing the sealing frame.

[0015] Furthermore, the pipeline valve assembly includes an air sampling pipeline and a ground sampling pipeline connected to the two-way blower, and the inner walls of the air sampling pipeline and the ground sampling pipeline are respectively connected to a plurality of penetration ports.

[0016] Furthermore, an air dust sampling head is fixedly connected to one end of the air sampling pipe away from the two-way blower, a blowing branch pipe is connected to the middle section of the air sampling pipe, an exhaust branch pipe is connected to the middle section of the ground sampling pipe, a dust filter plate is fixedly installed on the inner wall of the exhaust branch pipe, and electric butterfly valves are fixedly installed on the inner walls of the air sampling pipe, the ground sampling pipe, the blowing branch pipe and the exhaust branch pipe.

[0017] By adopting the above scheme, when sampling the dust and harmful gases in the air through the set pipeline valve assembly, the electric butterfly valves on the air sampling pipeline and the exhaust branch pipe are opened, and the electric butterfly valves on the blowing branch pipe and the ground sampling pipeline are closed; when sampling the dust on the ground, the electric butterfly valves on the blowing branch pipe and the exhaust branch pipe are opened first, and the electric butterfly valves on the air sampling pipeline and the ground sampling pipeline are closed to raise the dust; then the electric butterfly valves on the air sampling pipeline and the ground sampling pipeline are opened, and the electric butterfly valves on the blowing branch pipe and the exhaust branch pipe are closed to carry out sampling; when cleaning the dust on the air dust sampling head and the inner wall of the ground dust sampling frame, the electric butterfly valves on the air sampling pipeline, the blowing branch pipe and the exhaust branch pipe are opened, and the electric butterfly valve on the ground sampling pipeline is closed, so as to control the direction of air circulation.

[0018] Furthermore, the ground sampling mechanism includes an adjusting motor fixedly mounted on the outer wall of the sampling vehicle, the output shaft sleeve of the adjusting motor is provided with an adjusting threaded rod, the outer wall of the adjusting threaded rod is threadedly connected to a fixing bracket, and the fixing bracket is fixedly connected to a ground dust sampling frame on the side away from the adjusting threaded rod.

[0019] Furthermore, the inner wall of the ground dust sampling frame is slidably connected with a dust assembly, and the dust assembly includes a dust extension frame fixedly connected to one end of the blowing branch pipe away from the air sampling pipeline, and a dust suction extension frame fixedly connected to one end of the ground sampling pipeline away from the two-way blower.

[0020] Furthermore, the outer walls of the dust expansion frame and the dust collection expansion frame are fixedly connected with a plurality of limit sliders, the inner wall of the ground dust sampling frame is provided with a plurality of limit grooves, the inner walls of the plurality of limit grooves are respectively slidably connected with the outer walls of the plurality of limit sliders, the outer wall of the dust expansion frame is fixedly installed with ventilation louvers, and a dust filter plate is fixedly installed on the side of the ventilation louvers close to the dust collection expansion frame.

[0021] By adopting the above scheme, the ground dust sampling frame and the dust lifting component are set up to operate the adjusting motor. The output shaft of the adjusting motor drives the ground dust sampling frame to move downward through the adjusting threaded rod and the fixing frame. At the same time, sliding occurs between the limit sliders and the limit grooves on the dust lifting extension frame and the dust suction extension frame, and the ventilation louvers leak out. The two-way blower is operated in the reverse direction. Air is sucked in from the exhaust branch pipe and blown into the dust lifting extension frame through the blowing branch pipe to lift the ground dust in the ground dust sampling frame. Then, the dust-containing air in the ground dust sampling frame is sucked in through the dust suction extension frame and the ground sampling pipe, thereby sampling the ground dust.

[0022] Furthermore, a ground-attaching component is provided at the bottom of the ground dust sampling frame, and the ground-attaching component includes an external frame fixedly connected to the outer wall of the ground dust sampling frame, and the inner wall of the external frame is slidably connected with a plurality of ground-attaching blocks, and extrusion springs are fixedly connected between the tops of the plurality of ground-attaching blocks and the inner wall of the external frame.

[0023] By adopting the above scheme, through the provision of the ground-contacting component, the ground dust sampling frame continues to move downward while contacting the ground, so that the ground-contacting block fits the terrain under the compression of the compression spring, thereby forming a sealed space.

[0024] Beneficial effects of the present invention:

[0025] 1. Through the set sample storage and ventilation components, when sampling air dust, the two-way blower is run in the forward direction, and the dusty air is sucked in through the air dust sampling head connected to the air sampling pipe. The dusty air reaches the first connecting pipe through the penetration port, wherein the dust is blocked by the dust filter plate close to the air dust sampling head, and the harmful gas is adsorbed by the activated carbon adsorption block. After the air dust sampling is completed, the lifting motor is operated, and the output shaft of the lifting motor drives the connecting frame to rise through the lifting threaded rod, so that the sample storage and ventilation component containing a single dust filter plate is aligned with the penetration port to form a switch. When sampling ground dust, the two-way blower is run in the reverse direction, and the dusty air in the ground dust sampling frame is sucked into the second connecting pipe through the dust suction extension frame and the ground sampling pipe, and is blocked by the dust filter plate. After the ground dust sampling is completed, it is switched again, and multiple coal environment sampling points are sampled in series to achieve the effect of improving sampling efficiency and comprehensive detection.

[0026] 2. Through the set pipeline valve assembly and ground sampling mechanism, the electric butterfly valve is used to control the air circulation direction to sample the air and ground dust. When sampling the ground dust, the adjusting motor is operated, and the output shaft of the adjusting motor drives the ground dust sampling frame to move downward through the adjusting threaded rod by the fixed frame. At the same time, the limit sliders and the limit slots on the dust extension frame and the dust suction extension frame slide, and the ventilation louvers leak out. The two-way blower is operated in reverse, and the air is sucked in by the exhaust branch pipe and blown into the dust extension frame through the blowing branch pipe to lift the ground dust in the ground dust sampling frame. Then the dust-containing air in the ground dust sampling frame is sucked in through the dust suction extension frame and the ground sampling pipeline, ensuring the synchronous collection of air and ground dust data, so as to improve the sampling efficiency and simplify the sampling operation.

[0027] 3. Through the set ground-attaching components and pipeline valve components, the ground dust sampling frame continues to move downward while contacting the ground, so that the ground-attaching block fits the terrain under the extrusion of the extrusion spring, thereby forming a sealed space. After completing the sampling of air and ground, the ground sampling mechanism is retracted, the electric butterfly valves of the air sampling pipeline, the blowing branch pipe and the exhaust branch pipe are opened, the electric butterfly valve of the ground sampling pipeline is closed, and the two-way blower is reversed to blow air to the inner wall of the air dust sampling head and the ground dust sampling frame to remove the dust attached to the inner wall, thereby removing the dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1It is a schematic diagram of the main structure of the present invention;

[0029] Figure 2 It is a top view of the main structure of the present invention;

[0030] Figure 3 It is a schematic diagram of the structural cross-section of the pipeline valve assembly of the present invention;

[0031] Figure 4 It is a schematic cross-sectional view of the structure of the sample storage outer frame assembly of the present invention;

[0032] Figure 5 It is a schematic cross-sectional view of the structure of the lifting motor of the present invention;

[0033] Figure 6 For the present invention Figure 5 The structural diagram of the enlarged part at A in the middle;

[0034] Figure 7 It is a schematic diagram of the structural cross section of the ground sampling mechanism of the present invention;

[0035] Figure 8 It is a schematic diagram of the explosion structure of the ground-attached component of the present invention;

[0036] Fig. 9 For the present invention Figure 8 The structural diagram of the enlarged part at B in the middle;

[0037] Fig.10 It is a schematic diagram of the structural cross-section of the dust-raising component of the present invention.

[0038] In the figure:

[0039] 1. Sampling vehicle; 2. Two-way blower; 3. Sample storage mechanism; 31. Sample storage outer frame assembly; 311. Top cover; 312. Sealing frame; 313. Through hole; 314. Sealing slot; 32. Lifting threaded rod; 33. Sample storage ventilation assembly; 331. First connecting pipe; 332. Connecting frame; 333. Second connecting pipe; 334. Sealing ring; 335. Telescopic spring; 336. Activated carbon adsorption block; 34. Lifting motor; 4. Pipeline valve assembly; 41. Air sampling pipeline; 42. Electric butterfly valve; 4 3. Air dust sampling head; 44. Blowing branch pipe; 45. Ground sampling pipe; 46. Exhaust branch pipe; 5. Ground sampling mechanism; 51. Adjusting motor; 52. Adjusting threaded rod; 53. Fixing frame; 54. Ground dust sampling frame; 55. Dust assembly; 551. Dust extension frame; 552. Dust suction extension frame; 553. Limiting slider; 554. Limiting slot; 555. Ventilation louver; 56. Ground assembly; 561. External frame; 562. Extrusion spring; 563. Ground block; 6. Dust filter plate. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0041] Reference Figure 1 - Fig.10 , provides a sample collection device for detection and analysis based on coal safety monitoring, including a sampling vehicle 1, a two-way blower 2 and a pipeline valve assembly 4 arranged above the sampling vehicle 1, a sample storage mechanism 3 arranged in the middle position of the pipeline valve assembly 4, a ground sampling mechanism 5 arranged inside the sampling vehicle 1, and a dust filter plate 6 fixedly installed inside the pipeline valve assembly 4, the sample storage mechanism 3 and the ground sampling mechanism 5. The sample storage mechanism 3 includes a sample storage outer frame assembly 31 fixedly installed on the outer wall of the sampling vehicle 1, a lifting motor 34 is arranged inside the sample storage outer frame assembly 31, and the output shaft sleeve of the lifting motor 34 is provided with a lifting threaded rod 32, and the outer wall of the lifting threaded rod 32 is threadedly connected with a plurality of sample storage ventilation assemblies 33 arranged equidistantly.

[0042] Reference Figure 3 - Figure 6 The sample storage ventilation assembly 33 includes a connecting frame 332 threadedly connected to the outer wall of the lifting threaded rod 32, and the first connecting pipe 331 and the second connecting pipe 333 are fixedly connected on both sides of the connecting frame 332, and an activated carbon adsorption block 336 and two dust filter plates 6 are fixedly installed on the inner wall of one of the first connecting pipes 331, and the activated carbon adsorption block 336 is arranged between the two dust filter plates 6, and the dust filter plate 6 is fixedly installed on the inner wall of one of the second connecting pipes 333, and the sample storage ventilation assembly 33 containing the activated carbon adsorption block 336 and the two dust filter plates 6 and the sample storage ventilation assembly 33 containing a single dust filter plate 6 are alternately threadedly connected to the outer wall of the lifting threaded rod 32, and the first connecting pipe 331 and the second connecting pipe 333 are slidably connected at both ends with sealing rings 334, and a plurality of telescopic springs 335 are fixedly connected between the inner walls of the first connecting pipe 331 and the second connecting pipe 333 and the sealing rings 334.

[0043] Specifically, the bidirectional blower 2 has two operating modes, and the blowing directions of the two operating modes are opposite. The two sample storage and ventilation components 33 are a group. The first connecting tube 331 in the upper sample storage and ventilation component 33 contains an activated carbon adsorption block 336 and two dust filter plates 6, and the second connecting tube 333 is an empty connecting tube. The second connecting tube 333 in the lower sample storage and ventilation component 33 contains a dust filter plate 6, and the first connecting tube 331 is an empty connecting tube.

[0044] Through the sample storage ventilation component 33, when the air dust is sampled, the two-way blower 2 is operated in the forward direction, and the dust-containing air is sucked through the air dust sampling head 43 connected to the air sampling pipe 41. The dust-containing air reaches the first connecting pipe 331 through the penetration port 313, wherein the dust is intercepted by the dust filter plate 6 close to the air dust sampling head 43, and the harmful gas is adsorbed by the activated carbon adsorption block 336. After the air dust sampling is completed, the lifting motor 34 is operated, and the output shaft of the lifting motor 34 is connected to the lifting threaded rod 3 2 drives the connecting frame 332 to rise, so that the sample storage ventilation component 33 containing a single dust filter plate 6 is aligned with the penetration port 313, forming a switch. When sampling the ground dust, the two-way blower 2 is reversely operated, and the dust-containing air in the ground dust sampling frame 54 is sucked into the second connecting pipe 333 through the dust suction expansion frame 552 and the ground sampling pipeline 45, and is intercepted by the dust filter plate 6. After the ground dust sampling is completed, it is switched again to perform serial sampling of multiple coal environment sampling points, so as to improve the sampling efficiency and the comprehensive detection effect.

[0045] Reference Figure 4 - Figure 6 The sample storage outer frame assembly 31 includes a sealing frame 312 fixedly installed on the outer wall of the sampling vehicle 1, a top cover 311 is hinged on the top of the sealing frame 312, the inner wall of the sealing frame 312 is fixedly connected to the bottom of the lifting motor 34, and a plurality of through holes 313 are opened on the outer wall of the sealing frame 312, and the inner walls of the plurality of through holes 313 are fixedly connected with sealing grooves 314, and the inner wall of the sealing grooves 314 is clamped with the outer wall of the sealing ring 334.

[0046] Specifically, the sealing frame 312 is fixed at the middle section of the pipeline valve assembly 4 and is connected through the through hole 313. When the top cover 311 is opened, the sample storage ventilation assembly 33 can be taken and placed. When the top cover 311 is closed, sealed air is formed to prevent dust from entering.

[0047] By setting the sample storage outer frame component 31 and switching the sample storage ventilation component 33, the sealing ring 334 will be inserted into the sealing card groove 314 through the extension and contraction of the telescopic spring 335 to seal, thereby playing the role of sealing the sealing frame 312.

[0048] Reference Figure 2 - Figure 3The pipeline valve assembly 4 includes an air sampling pipeline 41 and a ground sampling pipeline 45 connected to the two-way blower 2. The inner walls of the air sampling pipeline 41 and the ground sampling pipeline 45 are respectively connected to multiple penetrations 313. An air dust sampling head 43 is fixedly connected to one end of the air sampling pipeline 41 away from the two-way blower 2. A blowing branch pipe 44 is connected to the middle section of the air sampling pipeline 41. An exhaust branch pipe 46 is connected to the middle section of the ground sampling pipeline 45. A dust filter plate 6 is fixedly installed on the inner wall of the exhaust branch pipe 46. Electric butterfly valves 42 are fixedly installed on the inner walls of the air sampling pipeline 41, the ground sampling pipeline 45, the blowing branch pipe 44 and the exhaust branch pipe 46.

[0049] When sampling dust and harmful gases in the air through the provided pipeline valve assembly 4, the electric butterfly valve 42 on the air sampling pipeline 41 and the exhaust branch pipe 46 is opened, and the electric butterfly valve 42 on the blowing branch pipe 44 and the ground sampling pipeline 45 is closed. When sampling the dust on the ground, the electric butterfly valve 42 on the blowing branch pipe 44 and the exhaust branch pipe 46 is first opened, and the electric butterfly valve 42 on the air sampling pipeline 41 and the ground sampling pipeline 45 is closed to raise dust, and then the electric butterfly valve 42 on the air sampling pipeline 41 and the ground sampling pipeline 45 is opened, and the electric butterfly valve 42 on the blowing branch pipe 44 and the exhaust branch pipe 46 is closed to sample. When dust is removed from the inner wall of the air dust sampling head 43 and the ground dust sampling frame 54, the electric butterfly valve 42 on the air sampling pipeline 41, the blowing branch pipe 44 and the exhaust branch pipe 46 is opened, and the electric butterfly valve 42 on the ground sampling pipeline 45 is closed, so as to control the direction of air circulation.

[0050] Reference Figure 7 - Fig. 9 The ground sampling mechanism 5 includes an adjusting motor 51 fixedly mounted on the outer wall of the sampling vehicle 1, the output shaft sleeve of the adjusting motor 51 is provided with an adjusting threaded rod 52, the outer wall of the adjusting threaded rod 52 is threadedly connected with a fixing frame 53, the fixing frame 53 is fixedly connected with a ground dust sampling frame 54 on the side away from the adjusting threaded rod 52, the inner wall of the ground dust sampling frame 54 is slidably connected with a dust component 55, the dust component 55 includes a dust extension frame 551 fixedly connected to one end of the blowing branch pipe 44 away from the air sampling pipe 41, and a dust extension frame 551 fixedly connected to the ground sampling frame 54. The duct 45 is fixedly connected to a dust collection extension frame 552 at one end away from the two-way blower 2, and the outer walls of the dust extension frame 551 and the dust collection extension frame 552 are fixedly connected with a plurality of limit sliders 553, and the inner wall of the ground dust sampling frame 54 is provided with a plurality of limit grooves 554, and the inner walls of the plurality of limit grooves 554 are respectively slidably connected with the outer walls of the plurality of limit sliders 553, and the outer wall of the dust collection extension frame 551 is fixedly installed with ventilation louvers 555, and a dust filter plate 6 is fixedly installed on the side of the ventilation louvers 555 close to the dust collection extension frame 552.

[0051] Specifically, when the ground dust sampling frame 54 descends, it fits into the ground to form an enclosed space. When the ground dust sampling frame 54 rises, it prevents obstacles from hitting the equipment when the sampling vehicle 1 moves. The dust extension frame 551 and the dust suction extension frame 552 are of the same size. The limit groove 554 and the limit slider 553 can limit the adjustment range and at the same time play the role of fixing the ground dust sampling frame 54. When the ventilation louvers 555 leak out, a ventilation path can be provided for the dust raising and dust suction processes, and a dust filter plate 6 is provided to prevent external dust from entering the ground dust sampling frame 54.

[0052] By means of the provided ground dust sampling frame 54 and the dust raising component 55, the adjusting motor 51 is operated, and the output shaft of the adjusting motor 51 drives the ground dust sampling frame 54 to move downward through the adjusting threaded rod 52 by the fixing frame 53. At the same time, sliding occurs between the limiting slider 553 and the limiting groove 554 on the dust raising extension frame 551 and the dust suction extension frame 552, and the ventilation louver 555 leaks out. The two-way blower 2 is operated in the reverse direction, and the air is sucked in by the exhaust branch pipe 46 and blown into the dust raising extension frame 551 through the blowing branch pipe 44 to raise the ground dust in the ground dust sampling frame 54. Then, the dust-containing air in the ground dust sampling frame 54 is sucked in through the dust suction extension frame 552 and the ground sampling pipe 45, thereby sampling the ground dust.

[0053] Reference Figure 8 A ground-attaching component 56 is provided at the bottom of the ground dust sampling frame 54, and the ground-attaching component 56 includes an external frame 561 fixedly connected to the outer wall of the ground dust sampling frame 54, and a plurality of ground-attaching blocks 563 are slidably connected to the inner wall of the external frame 561, and an extrusion spring 562 is fixedly connected between the tops of the plurality of ground-attaching blocks 563 and the inner wall of the external frame 561.

[0054] By setting the ground-contacting component 56, the ground dust sampling frame 54 continues to move downward while contacting the ground, so that the ground-contacting block 563 fits the terrain under the compression of the compression spring 562, thereby forming a sealed space.

[0055] During use, the sampling vehicle 1 is controlled to move to the preset coal environment sampling point, and the dust and harmful gases in the air are sampled first. The electric butterfly valve 42 on the air sampling pipeline 41 and the exhaust branch pipe 46 is opened, and the electric butterfly valve 42 on the blowing branch pipe 44 and the ground sampling pipeline 45 is closed. The two-way blower 2 is operated in the forward direction, and the dust-containing air is sucked in through the air dust sampling head 43 connected to the air sampling pipeline 41. The dust-containing air reaches the first connecting pipe 331 through the penetration port 313, and the dust is close to the air. The dust filter plate 6 of the dust sampling head 43 intercepts the harmful gas, which is adsorbed by the activated carbon adsorption block 336 and then filtered by the dust filter plate 6 near the two-way blower 2, and finally flows through the inside of the two-way blower 2 and discharges the air from the exhaust branch pipe 46. After sampling, the dust on the ground is sampled again, the sample storage ventilation component 33 is adjusted, and then the adjustment motor 51 is operated. The output shaft of the adjustment motor 51 drives the ground dust sampling frame 54 to move downward through the adjustment threaded rod 52 and the fixed frame 53. At the same time, the dust expansion frame 551 and the dust suction frame 551 are The limit slider 553 on the expansion frame 552 slides with the limit groove 554, causing the ventilation louver 555 to leak out. The ground dust sampling frame 54 continues to move downward while contacting the ground, so that the ground block 563 fits the terrain under the extrusion of the extrusion spring 562 to form a seal, open the electric butterfly valve 42 on the blowing branch pipe 44 and the exhaust branch pipe 46, close the electric butterfly valve 42 on the air sampling pipeline 41 and the ground sampling pipeline 45, and reversely operate the two-way blower 2. Air is sucked in from the exhaust branch pipe 46 and passes through the blowing branch pipe. 44 is blown into the dust expansion frame 551 to lift the ground dust in the ground dust sampling frame 54, and then the electric butterfly valve 42 of the air sampling pipe 41 and the ground sampling pipe 45 is opened, and the electric butterfly valve 42 on the blowing branch pipe 44 and the exhaust branch pipe 46 is closed, and the two-way blower 2 is reversed. The dusty air in the ground dust sampling frame 54 is sucked into the second connecting pipe 333 through the dust suction expansion frame 552 and the ground sampling pipe 45, and is blocked by the dust filter plate 6. The remaining air is discharged from the air sampling pipe 41, and the sampling is completed.

[0056] Working principle of the present invention:

[0057] During operation, the sampling vehicle 1 is controlled to move to the preset coal environment sampling point, and the dust and harmful gases in the air are sampled first. The electric butterfly valve 42 on the air sampling pipe 41 and the exhaust branch pipe 46 is opened, and the electric butterfly valve 42 on the blowing branch pipe 44 and the ground sampling pipe 45 is closed. The two-way blower 2 is run in the forward direction, and the dust-containing air is sucked in through the air dust sampling head 43 connected to the air sampling pipe 41. The dust-containing air reaches the first connecting pipe 331 through the penetration port 313, wherein the dust is intercepted by the dust filter plate 6 close to the air dust sampling head 43, and the harmful gas is adsorbed by the activated carbon adsorption block 336, and then filtered through the dust filter plate 6 close to the two-way blower 2, and finally flows through the interior of the two-way blower 2 to discharge the air from the exhaust branch pipe 46 to complete the sampling.

[0058] To sample the dust on the ground, first operate the lifting motor 34. The output shaft of the lifting motor 34 drives the connecting frame 332 to rise via the lifting threaded rod 32, so that the sample storage ventilation assembly 33 containing a single dust filter plate 6 is aligned with the penetration port 313, and the sealing ring 334 is inserted into the sealing slot 314 through the telescopic spring 335 for sealing.

[0059] Then, the adjusting motor 51 is operated, and the output shaft of the adjusting motor 51 drives the ground dust sampling frame 54 to move downward through the adjusting threaded rod 52 and the fixing frame 53. At the same time, sliding occurs between the limiting slider 553 and the limiting groove 554 on the dust generating extension frame 551 and the dust collecting extension frame 552, and the ventilation louver 555 leaks out. The ground dust sampling frame 54 continues to move downward while contacting the ground, so that the ground block 563 fits the terrain under the extrusion of the extrusion spring 562 to form a seal.

[0060] Open the electric butterfly valve 42 on the blowing branch pipe 44 and the exhaust branch pipe 46, close the electric butterfly valve 42 on the air sampling pipe 41 and the ground sampling pipe 45, and reversely operate the two-way blower 2. Air is sucked in from the exhaust branch pipe 46 and blown into the dust expansion frame 551 through the blowing branch pipe 44 to lift the ground dust in the ground dust sampling frame 54. Then open the electric butterfly valve 42 on the air sampling pipe 41 and the ground sampling pipe 45, close the electric butterfly valve 42 on the blowing branch pipe 44 and the exhaust branch pipe 46, and reversely operate the two-way blower 2. The dust-containing air in the ground dust sampling frame 54 is sucked into the second connecting pipe 333 through the dust suction expansion frame 552 and the ground sampling pipe 45, and is intercepted by the dust filter plate 6. The remaining air is discharged from the air sampling pipe 41, and the sampling is completed.

[0061] After completing the sampling of air and ground, retract the ground sampling mechanism 5, open the electric butterfly valve 42 of the air sampling pipe 41, the blowing branch pipe 44 and the exhaust branch pipe 46, close the electric butterfly valve 42 of the ground sampling pipe 45, reversely operate the two-way blower 2, blow air to the inner wall of the air dust sampling head 43 and the ground dust sampling frame 54, remove the dust attached to the inner wall, operate the lifting motor 34 again, adjust the position of the next set of sample storage ventilation components 33, control the sampling vehicle 1 to move to the next preset coal environment sampling point, and perform the storage sampling step for sampling.

[0062] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A sample collection device for detection and analysis based on coal safety monitoring, comprising a sampling vehicle (1), a two-way blower (2) and a pipeline valve assembly (4) arranged above the sampling vehicle (1), a sample storage mechanism (3) arranged in the middle of the pipeline valve assembly (4), a ground sampling mechanism (5) arranged inside the sampling vehicle (1), and a dust filter plate (6) fixedly installed inside the pipeline valve assembly (4), the sample storage mechanism (3) and the ground sampling mechanism (5), characterized in that: The sample storage mechanism (3) comprises a sample storage outer frame assembly (31) fixedly mounted on the outer wall of the sampling vehicle (1), a lifting motor (34) is arranged inside the sample storage outer frame assembly (31), an output shaft sleeve of the lifting motor (34) is provided with a lifting threaded rod (32), and the outer wall of the lifting threaded rod (32) is threadedly connected with a plurality of sample storage ventilation assemblies (33) arranged at equal distances; The sample storage ventilation assembly (33) comprises a connecting frame (332) threadedly connected to the outer wall of the lifting threaded rod (32), and the first connecting pipe (331) and the second connecting pipe (333) are fixedly connected on both sides of the connecting frame (332), and an activated carbon adsorption block (336) and two dust filter plates (6) are fixedly installed on the inner wall of one of the first connecting pipes (331), and the activated carbon adsorption block (336) is arranged between the two dust filter plates (6), and a dust filter plate (6) is fixedly installed on the inner wall of one of the second connecting pipes (333), and the sample storage ventilation assembly (33) containing the activated carbon adsorption block (336) and the two dust filter plates (6) and the sample storage ventilation assembly (33) containing a single dust filter plate (6) are alternately threadedly connected to the outer wall of the lifting threaded rod (32).

2. The sample collection device for detection and analysis based on coal safety monitoring according to claim 1 is characterized in that: Both ends of the first connecting tube (331) and the second connecting tube (333) are slidably connected with sealing rings (334), and a plurality of telescopic springs (335) are fixedly connected between the inner walls of the first connecting tube (331) and the second connecting tube (333) and the sealing rings (334).

3. The sample collection device for detection and analysis based on coal safety monitoring according to claim 2 is characterized in that: The sample storage outer frame assembly (31) includes a sealing frame (312) fixedly mounted on the outer wall of the sampling vehicle (1), a top cover (311) is hingedly connected to the top of the sealing frame (312), and an inner wall of the sealing frame (312) is fixedly connected to the bottom of the lifting motor (34).

4. The sample collection device for detection and analysis based on coal safety monitoring according to claim 3 is characterized in that: The outer wall of the sealing frame (312) is provided with a plurality of through openings (313), the inner walls of the plurality of through openings (313) are fixedly connected with a sealing card slot (314), and the inner wall of the sealing card slot (314) is card-engaged with the outer wall of the sealing ring (334).

5. The sample collection device for detection and analysis based on coal safety monitoring according to claim 4 is characterized in that: The pipeline valve assembly (4) comprises an air sampling pipeline (41) and a ground sampling pipeline (45) which are connected to the bidirectional blower (2); the inner walls of the air sampling pipeline (41) and the ground sampling pipeline (45) are respectively connected to a plurality of penetration holes (313).

6. The sample collection device for detection and analysis based on coal safety monitoring according to claim 5 is characterized in that: An air dust sampling head (43) is fixedly connected to one end of the air sampling pipe (41) away from the bidirectional blower (2); a blowing branch pipe (44) is connected to the middle section of the air sampling pipe (41); an exhaust branch pipe (46) is connected to the middle section of the ground sampling pipe (45); a dust filter plate (6) is fixedly installed on the inner wall of the exhaust branch pipe (46); and electric butterfly valves (42) are fixedly installed on the inner walls of the air sampling pipe (41), the ground sampling pipe (45), the blowing branch pipe (44) and the exhaust branch pipe (46).

7. The sample collection device for detection and analysis based on coal safety monitoring according to claim 1 is characterized in that: The ground sampling mechanism (5) comprises an adjusting motor (51) fixedly mounted on the outer wall of the sampling vehicle (1); an adjusting threaded rod (52) is provided on the output shaft sleeve of the adjusting motor (51); a fixing frame (53) is threadedly connected to the outer wall of the adjusting threaded rod (52); and a ground dust sampling frame (54) is fixedly connected to the side of the fixing frame (53) away from the adjusting threaded rod (52).

8. The sample collection device for detection and analysis based on coal safety monitoring according to claim 7 is characterized in that: The inner wall of the ground dust sampling frame (54) is slidably connected to a dust raising component (55), and the dust raising component (55) comprises a dust raising extension frame (551) fixedly connected to one end of the blowing branch pipe (44) away from the air sampling pipe (41), and a dust suction extension frame (552) fixedly connected to one end of the ground sampling pipe (45) away from the two-way blower (2).

9. The sample collection device for detection and analysis based on coal safety monitoring according to claim 8, characterized in that: The outer walls of the dust generating extension frame (551) and the dust collecting extension frame (552) are both fixedly connected with a plurality of limit sliders (553); the inner wall of the ground dust sampling frame (54) is provided with a plurality of limit slots (554); the inner walls of the plurality of limit slots (554) are respectively slidably connected with the outer walls of the plurality of limit sliders (553); the outer wall of the dust generating extension frame (551) is fixedly installed with a ventilation louver (555); and a dust filter plate (6) is fixedly installed on a side of the ventilation louver (555) close to the dust collecting extension frame (552).

10. The sample collection device for detection and analysis based on coal safety monitoring according to claim 9, characterized in that: A ground-attaching component (56) is arranged at the bottom of the ground dust sampling frame (54), and the ground-attaching component (56) comprises an external frame (561) fixedly connected to the outer wall of the ground dust sampling frame (54), and a plurality of ground-attaching blocks (563) are slidably connected to the inner wall of the external frame (561), and a compression spring (562) is fixedly connected between the tops of the plurality of ground-attaching blocks (563) and the inner wall of the external frame (561).

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