Portable Beta ray method atmospheric particulate concentration analyzer

Abstract

The invention provides a portable Beta ray method atmospheric particulate concentration analyzer which comprises a mainframe box, a touch control mainframe is arranged on the side wall of the mainframe box, a lower pipe assembly is vertically arranged in the middle of the surface of the mainframe box, and an atmosphere suction assembly is assembled and connected to the top end of the lower pipe assembly; the atmosphere suction assembly comprises an upper pipe body and an air suction cover, and the air suction cover is arranged at the top end of the upper pipe body; a middle cavity is formed in the middle of the interior of the mainframe box, an independent first storage cavity is formed in one side of the middle cavity, and an independent second storage cavity is formed in the other side of the middle cavity; a Beta ray probe is mounted in the gas guide seat; an air guide adjusting assembly is transversely and slidably mounted in the air guide seat, a sample collecting assembly is mounted at the bottom of the air guide seat, and a composite driving assembly is mounted at the bottom in the second storage cavity. The analyzer can be detached and stored, and the mainframe box can be lifted to be suspended, so that the analyzer is convenient to carry and operate on site.

Description

Technical Field

[0001] The invention relates to the technical field of particle concentration analyzers, and in particular to a portable Beta ray atmospheric particle concentration analyzer. Background Art

[0002] The Beta ray atmospheric particle concentration analyzer is an instrument used to measure the concentration of particles in the air. It works based on the principle of beta ray absorption. In this method, air passes through a filter and the particles in it are trapped on the filter membrane. Subsequently, high-speed electrons emitted by a beta ray source (such as radioactive isotopes) pass through the filter membrane. Since the particles on the filter membrane absorb part of the beta rays, the mass concentration of the particles can be calculated by measuring the intensity of the beta rays passing through the filter membrane.

[0003] This analyzer is characterized by high accuracy and good stability. It is suitable for continuous monitoring of particulate matter concentration in the environment and is widely used in environmental protection, meteorology, sanitation and other fields. When using it, attention should be paid to radiation safety, ensuring the safety of operators and complying with relevant radiation protection regulations.

[0004] At present, most of the analyzer chassis are floor-standing type. This structure is mostly placed on a table for use. When used outdoors, there are the following inconveniences:

[0005] 1. The analyzer is directly placed outdoors, which is prone to dirt, water and other impurities, and needs to be cleaned later;

[0006] 2. The overall length of the analyzer's air inlet pipe is relatively long, which occupies a large space during transportation and is inconvenient to carry. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides a portable Beta ray atmospheric particulate matter concentration analyzer, which solves the problems mentioned in the background technology.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] A portable Beta ray atmospheric particulate matter concentration analyzer comprises a main box, a touch control main box is arranged on the side wall of the main box, a lower tube assembly is vertically arranged on the middle of the surface of the main box, and the top of the lower tube assembly is assembled and connected to an atmospheric suction assembly; the atmospheric suction assembly comprises an upper tube body and an air suction hood, the top of the upper tube body is provided with an air suction hood, the bottom side wall of the upper tube body is provided with an upper assembly plate, the lower tube assembly comprises a lower tube body, the lower tube body is butt-jointed and connected to the bottom of the upper tube body, a lower assembly plate is arranged on the top of the side wall of the lower tube body, and the upper assembly plate and the lower assembly plate are connected as a whole by screws; a central axis support assembly is vertically slidably installed inside the lower tube body, and the lower tube body is fixed to the central axis support assembly by a locking knob;

[0010] The middle part of the main case is a middle cavity, one side of the middle cavity is an independent first storage cavity, and the other side is an independent second storage cavity. The middle axis support assembly vertically slides through the middle cavity of the main case, and the bottom end of the middle axis support assembly is connected to the floor stand; an air guide seat is installed at the top of the second storage cavity, and the bottom side wall of the lower tube body is connected to the air guide seat through an exhaust pipe. The inside of the air guide seat is provided with a sampling exhaust hole and a detection exhaust hole, and a Beta ray probe is installed inside the air guide seat; an air guide adjustment assembly is installed in the interior of the air guide seat for horizontal sliding, and a sample collection assembly is installed at the bottom of the air guide seat, and a composite drive assembly is installed at the bottom of the second storage cavity;

[0011] The analyzer includes the following working states:

[0012] In the first state, the air guide adjustment component adjusts the air guide seat to close the sampling exhaust hole and open the detection exhaust hole, and the external air is introduced into the air guide seat through the air suction cover, the upper tube body, the lower tube body and the exhaust pipe, and the Beta ray probe detects atmospheric particulate matter;

[0013] In the second state, the composite driving assembly synchronously drives the sample collection assembly to rotate and the gas guide adjustment assembly to translate, so that the sampling exhaust hole of the gas guide seat is opened and the detection exhaust hole is closed, and the empty storage cavity in the sample collection assembly is connected to the sampling exhaust hole;

[0014] In the third state, the upper tube body is separated from the lower tube body, and the atmosphere suction assembly is placed in the first storage chamber.

[0015] Furthermore, the main chassis includes the following modes: in floor-standing mode, the bottom surface of the main chassis is attached to the floor stand; in suspended mode, the main chassis is lifted up along the central axis support assembly, so that the main chassis, the lower tube assembly and the atmospheric intake assembly are lifted up and suspended, and the floor stand and the central axis support assembly support the main chassis from the bottom.

[0016] Furthermore, the lower tube assembly also includes a movable sleeve, and the central axis support assembly includes a supporting middle tube, which is vertically fixed to the middle of the surface of the floor seat, and the supporting middle tube slides through the main box and extends into the inner top of the lower tube body. The movable sleeve is slidably sleeved on the outer wall of the supporting middle tube, and the movable sleeve is fixed to the inner bottom of the lower tube body, and the inlet end of the exhaust pipe is connected to the top of the movable sleeve.

[0017] Furthermore, the interior of the air guide seat is separated from top to bottom by an air intake cavity, a first side groove and a second side groove, the top of the air intake cavity is connected to an air intake connector, the air intake connector is arranged on the surface of the main chassis, the outlet end of the exhaust pipe is inserted into the air intake connector, a detection exhaust hole is opened on one side of the air intake cavity, a Beta ray probe is installed on the other side, a sampling exhaust hole is opened on the bottom of the air intake cavity, the opening directions of the first side groove and the second side groove are opposite, an air guide hole is opened on the top of the second side groove, the sampling exhaust hole and the air guide hole are located on the same center line, and the first side groove is arranged between the sampling exhaust hole and the air guide hole.

[0018] Further, the air guide adjustment assembly includes a vertical plate, an air guide tube, a spring and a sealing long plate, the sealing long plate slides horizontally and is inserted into the first side groove, the air guide tube is inverted L-shaped, the horizontal section of the air guide tube slides and is inserted into the second side groove, the outer end bottom of the sealing long plate is vertically provided with a vertical plate, the vertical plate is slidably mounted on the guide rod, the guide rod is horizontally fixed in the main box, the bottom end of the vertical plate extends to the composite drive assembly, one end of the spring is connected to the inner top surface of the main box, and the other end is connected to the surface of the sealing long plate, the bottom surface of the sealing long plate is connected to the vertical section of the air guide tube through a linkage rod, the linkage rod is arranged at the bottom of the air guide seat, and the top surface of the air guide tube is vertically provided with a side sealing plate;

[0019] In the detection state, the sealing long plate is inserted into the first side groove to block the sampling exhaust hole, and the side sealing plate is separated from the detection exhaust hole;

[0020] In the sampling state, the sealing long plate and the air duct move to one side synchronously, the sealing long plate detaches from the sampling exhaust hole, the horizontal section of the air duct is inserted into the second side groove, the inlet of the air duct, the air hole and the sampling exhaust hole are connected to each other, and the side sealing plate blocks the detection exhaust hole.

[0021] Furthermore, the sample collection component includes a sample collecting tube, which is rotatably mounted on a support plate, which is fixed in a main chassis, and a storage cavity arranged in a circular array is provided inside the sample collecting tube, and a plurality of air inlet square tubes are provided on the top surface of the sample collecting tube, and each storage cavity corresponds to a group of air inlet square tubes above, and an air inlet hole is provided on the top of the air inlet square tube, and an elastic sealing plate is slidably mounted on the top surface of the air inlet square tube; when the air guide tube is inserted into the second side groove, the vertical section of the air guide tube contacts the elastic sealing plate and moves open, so that the air guide tube is connected with the air inlet square tube.

[0022] Furthermore, the composite drive assembly includes a driving motor, a vertical shaft and a support seat; the vertical shaft is rotatably placed on the inner bottom surface of the second storage chamber, the top of the vertical shaft is connected to the sample collecting tube, the outer wall of the vertical shaft is provided with a first gear and a second gear, the second gear is provided at the bottom of the first gear, and the output end of the driving motor is meshed and connected to the second gear; the support seat is provided on the inner bottom surface of the second storage chamber, and a rotating plate is symmetrically installed inside the support seat for rotation, each rotating plate is symmetrically provided with a resistance plate on the outer wall, the resistance plate is provided on the outer side of the support seat, and each rotating plate is provided with a group of fifth gears on the inner wall, and the internal horizontal rotation of the support seat is penetrated by a transverse shaft, the outer end of the transverse shaft is provided with a third gear, and the inner end is provided with a fourth gear, the fourth gear is meshed and connected to the two groups of fifth gears, and the third gear is meshed and connected to the first gear; when the vertical shaft rotates, the sample collecting tube and the resistance plate are synchronously driven to rotate, and the resistance plate resists the vertical plate to move outward.

[0023] Furthermore, an upper middle axis rod is coaxially installed inside the upper tube body, the top end of the upper middle axis rod is rotatably connected to an upper triangular plate, the upper triangular plate is fixed to the inner top of the upper tube body, the outer wall of the upper middle axis rod is connected to an upper scraper strip through a connecting rod, the upper scraper strip is vertically arranged and fits against the inner wall of the upper tube body; a lower slot is provided at the bottom end of the upper middle axis rod, and a card slot is symmetrically provided on the inner wall of the lower slot.

[0024] Furthermore, a lower middle axis rod is coaxially installed inside the lower tube body, and the lower middle axis rod is vertically slidably placed in the supporting middle tube. A lower triangular plate is fixedly provided at the top end of the lower middle axis rod, and the lower triangular plate is placed on the top of the supporting middle tube. The outer wall of the lower triangular plate is provided with a lower scraper strip extending vertically downward, and the lower scraper strip is placed between the lower tube body and the supporting middle tube, and a movable sleeve is placed at the bottom of the lower scraper strip; an insertion shaft is vertically provided at the center of the top surface of the lower triangular plate, and an elastic card block is provided on the outer wall of the insertion shaft, and the insertion shaft is inserted into the lower slot, and the elastic card block is fitted into the card slot.

[0025] Furthermore, the central axis support assembly also includes a cleaning handle and a driving rod, the bottom end of the driving rod is vertically provided with a cleaning handle, the cleaning handle is arranged at the bottom of the floor seat, the top end of the driving rod is symmetrically provided with a key block, the interior of the lower central axis rod is provided with a cross groove adapted to the shape of the driving rod, the lower central axis rod is vertically slidably embedded in the cross groove, the length of the lower central axis rod is greater than the length of the supporting central tube, and the length of the lower central axis rod is less than the length of the supporting central tube; the analyzer also includes a fourth state,

[0026] The cleaning handle is rotated to drive the lower scraper bar to rotate and clean the lower tube body, and the upper scraper bar is rotated and cleans the upper tube body; the exhaust pipe is separated from the air inlet joint, and the air suction hood exhausts air to blow out the cleaned particles.

[0027] The present invention provides a portable Beta ray atmospheric particulate matter concentration analyzer. Compared with the prior art, it has the following beneficial effects:

[0028] 1. The atmospheric suction component is designed to inhale the atmosphere, and the lower tube component is designed to increase the air intake height of the atmospheric suction component by one level. When carrying, the atmospheric suction component can be separated from the lower tube component, and the atmospheric suction component is stored in the first storage chamber, so that the overall height can be reduced and it is easy to carry; when testing is required, the atmospheric suction component is installed on the top of the lower tube component, and the upper assembly plate is fixedly connected to the lower assembly plate by screws, which is easy to assemble;

[0029] 2. The design of the central axis support assembly can increase the air intake height of the atmospheric suction assembly in two stages. When the main chassis is placed on the ground at the collection position and it is inconvenient to operate or the air intake height is insufficient, the main chassis can be lifted up as a whole, so that the lower tube assembly, the atmospheric suction assembly, and the main chassis are lifted up along the central axis support assembly. In this way, the main chassis is easy to set up in the air, which is more convenient for workers to operate and the air intake height is higher. When there is no need to increase the height, the main chassis is attached to the base, and the central axis support assembly is put into the lower tube assembly. In this way, the overall height of the instrument can be reduced, making it easier to put the equipment on the table for use;

[0030] 3. The air guide adjustment component can adjust the exhaust mode of the air guide seat, and can exhaust to the outside normally. When the atmosphere passes through the air guide seat, the Beta ray probe can detect the concentration of atmospheric particulate matter;

[0031] When sampling is required, the composite drive assembly synchronously drives the gas guide adjustment assembly to translate and the sample collection assembly to rotate. The purpose of the rotation of the sample collection assembly is to ensure that each time sampling is taken, an empty storage chamber is rotated to the sampling position. The translation of the gas guide adjustment assembly can open the sampling exhaust hole and close the detection exhaust hole, and can also push the sealing structure above the storage chamber to open, thereby realizing automatic connection of the sampling gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 The schematic diagram of the floor-standing structure of the Beta ray atmospheric particulate matter concentration analyzer of the present invention is shown;

[0034] Figure 2 A schematic diagram of the internal connection structure between the lower tube body and the upper tube body of the present invention is shown;

[0035] Figure 3 A schematic diagram of the structure of the connection between the lower tube body and the upper tube body of the present invention is shown;

[0036] Figure 4A schematic diagram of the structure of the upper scraper strip of the present invention is shown;

[0037] Figure 5 A schematic diagram of the internal structure of the supporting middle tube of the present invention is shown;

[0038] Figure 6 A schematic diagram of the connection structure between the bottom end of the upper middle shaft rod and the lower middle shaft rod of the present invention is shown;

[0039] Figure 7 A schematic diagram of the cross-sectional structure of the lower middle shaft rod of the present invention is shown;

[0040] Figure 8 A schematic diagram of the internal structure of the main chassis of the present invention is shown;

[0041] Fig. 9 A schematic diagram of the structure of the main chassis of the present invention in a detection state is shown;

[0042] Fig.10 A schematic diagram of the side cross-section structure of the air guide seat of the present invention is shown;

[0043] Fig.11 A schematic diagram of the structure of the mainframe box of the present invention in a sampling state is shown;

[0044] Fig.12 It shows a schematic structural diagram of the elastic sealing plate of the present invention in a closed state;

[0045] Fig.13 It shows a schematic structural diagram of the elastic sealing plate of the present invention in an open state;

[0046] Fig.14 A schematic diagram of the internal structure of the support base of the present invention is shown;

[0047] Fig.15 It shows a schematic diagram of the structure of the main chassis of the present invention in the lifted state;

[0048] As shown in the figure: 1. Main chassis, 11. Touch host, 12. First storage cavity, 13. Second storage cavity, 14. Middle cavity, 2. Floor stand, 3. Lower tube assembly, 31. Lower tube body, 311. Locking knob, 312. Lower assembly plate, 32. Movable sleeve, 33. Lower scraper, 34. Exhaust pipe, 35. Lower triangular plate, 352. Insert shaft, 3521. Elastic block, 36. Lower middle axis rod, 361. Cross groove, 4. Atmospheric suction assembly, 41. Upper tube body, 411. Upper assembly plate, 42. Suction hood, 43. Upper middle axis rod, 431. Lower slot, 4311. Card slot, 44. Connecting rod, 45. Upper scraper, 46. Upper triangular plate, 5. Middle axis support assembly, 51. Support middle tube, 52. Drive rod, 521. Key block, 53. Cleaning handle, 6. Air guide adjustment group Parts, 61, vertical plate, 62, guide rod, 63, sealing long plate, 64, spring, 65, linkage rod, 66, air guide tube, 67, side sealing plate, 7, sample collection component, 71, sample collection tube, 72, support plate, 73, air intake square tube, 731, air intake hole, 74, elastic sealing plate, 8, composite drive component, 81, drive motor, 82, vertical rotation axis, 821, first gear, 822, second gear, 83, horizontal rotation axis, 831, third gear, 832, fourth gear, 84, support seat, 85, rotating plate, 851, contact plate, 852, fifth gear, 9, air guide seat, 91, air intake cavity, 911, sampling exhaust hole, 912, detection exhaust hole, 92, first side groove, 93, air guide hole, 94, second side groove, 95, air intake joint, 9a, Beta ray probe. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] Embodiment 1

[0051] In order to solve the technical problems in the background technology, the following portable Beta ray atmospheric particulate matter concentration analyzer is provided:

[0052] Combination Figure 1-Figure 15As shown, the portable Beta ray atmospheric particulate matter concentration analyzer provided by the present invention comprises a main box 1, a touch host 11 is arranged on the side wall of the main box 1, a lower tube assembly 3 is vertically arranged on the middle of the surface of the main box 1, and the top of the lower tube assembly 3 is assembled and connected to the atmospheric suction assembly 4; the atmospheric suction assembly 4 comprises an upper tube body 41 and an air suction hood 42, the top of the upper tube body 41 is provided with an air suction hood 42, the bottom side wall of the upper tube body 41 is provided with an upper assembly plate 411, the lower tube assembly 3 comprises a lower tube body 31, the lower tube body 31 is connected to the bottom of the upper tube body 41, the top of the side wall of the lower tube body 31 is provided with a lower assembly plate 312, and the upper assembly plate 411 and the lower assembly plate 312 are connected as a whole by screws; a central axis support assembly 5 is vertically slidably installed inside the lower tube body 31, and the lower tube body 31 is fixed to the central axis support assembly 5 by a locking knob 311;

[0053] The middle part of the main chassis 1 is a middle cavity 14, one side of the middle cavity 14 is an independent first storage cavity 12, and the other side is an independent second storage cavity 13. The middle axis support assembly 5 vertically slides through the middle cavity 14 of the main chassis 1, and the bottom end of the middle axis support assembly 5 is connected to the floor stand 2; the top of the second storage cavity 13 is installed with an air guide seat 9, and the bottom side wall of the lower tube body 31 is connected to the air guide seat 9 through the exhaust pipe 34. The inside of the air guide seat 9 is provided with a sampling exhaust hole 911 and a detection exhaust hole 912, and the inside of the air guide seat 9 is installed with a Beta ray probe 9a; the inside of the air guide seat 9 is laterally slidably installed with an air guide adjustment assembly 6, the bottom of the air guide seat 9 is installed with a sample collection assembly 7, and the bottom of the second storage cavity 13 is installed with a composite drive assembly 8;

[0054] The analyzer includes the following working states:

[0055] In the first state, the air guide adjustment component 6 adjusts the air guide seat 9 so that the sampling exhaust hole 911 is closed and the detection exhaust hole 912 is opened, and the external air is introduced into the air guide seat 9 through the air suction cover 42, the upper tube body 41, the lower tube body 31 and the exhaust pipe 34, and the Beta ray probe 9a detects atmospheric particulate matter;

[0056] In the second state, the composite driving component 8 synchronously drives the sample collecting component 7 to rotate and the air guiding regulating component 6 to translate, so that the sampling exhaust hole 911 of the air guiding seat 9 is opened and the detection exhaust hole 912 is closed, and the empty storage cavity in the sample collecting component 7 is connected with the sampling exhaust hole 911;

[0057] In the third state, the upper tube body 41 is separated from the lower tube body 31, and the atmosphere suction assembly 4 is placed in the first storage chamber 12;

[0058] The main chassis 1 includes the following modes: in the floor-standing mode, the bottom surface of the main chassis 1 is attached to the floor-standing seat 2; in the suspended mode, the main chassis 1 is lifted up along the central axis support assembly 5, so that the main chassis 1, the lower tube assembly 3 and the atmospheric intake assembly 4 are lifted up and suspended in the air, and the floor-standing seat 2 and the central axis support assembly 5 support the main chassis 1 from the bottom.

[0059] In the above scheme:

[0060] 1. The atmospheric suction component is designed to inhale the atmosphere, and the lower tube component is designed to increase the air intake height of the atmospheric suction component by one level. When carrying, the atmospheric suction component can be separated from the lower tube component, and the atmospheric suction component is stored in the first storage chamber, so that the overall height can be reduced and it is easy to carry; when testing is required, the atmospheric suction component is installed on the top of the lower tube component, and the upper assembly plate is fixedly connected to the lower assembly plate by screws, which is easy to assemble;

[0061] 2. The design of the central axis support assembly can increase the air intake height of the atmospheric suction assembly in two stages. When the main chassis is placed on the ground and is inconvenient to operate or the air intake height is insufficient, the main chassis can be lifted up as a whole, so that the lower tube assembly, the atmospheric suction assembly, and the main chassis are lifted up along the central axis support assembly. In this way, the main chassis is easy to set up in the air, which is more convenient for workers to operate and the air intake height is higher. When there is no need to increase the height, the main chassis is attached to the base, and the central axis support assembly is retracted into the lower tube assembly. In this way, the overall height of the instrument can be reduced, making it easier to place the equipment on the table for use;

[0062] 3. The air guide adjustment component can adjust the exhaust mode of the air guide seat, and can exhaust to the outside normally. When the atmosphere passes through the air guide seat, the Beta ray probe can detect the concentration of atmospheric particulate matter;

[0063] When sampling is required, the composite driving component synchronously drives the gas guide adjustment component to translate and the sample collection component to rotate. The purpose of the rotation of the sample collection component is to ensure that each time a sample is taken, an empty storage cavity is rotated to the sampling position. The translation of the gas guide adjustment component can open the sampling exhaust hole and close the detection exhaust hole, and can also push the sealing structure above the storage cavity to open, so as to realize automatic connection of the sampling gas guide;

[0064] When the grounding base is grounded, each anchor nail can be inserted into the soil to fix the grounding base.

[0065] In this embodiment, the lower tube assembly 3 also includes a movable sleeve 32, and the central axis support assembly 5 includes a supporting middle tube 51, which is vertically fixed to the middle of the surface of the floor seat 2, and the supporting middle tube 51 slides through the main box 1 and extends into the inner top of the lower tube body 31. The movable sleeve 32 is slidably sleeved on the outer wall of the supporting middle tube 51, and the movable sleeve 32 is fixed to the inner bottom of the lower tube body 31. The inlet end of the exhaust pipe 34 is connected to the top of the movable sleeve 32.

[0066] In the above scheme: a movable sleeve is arranged at the inner bottom of the lower tube body, and the movable sleeve can move vertically along the supporting middle tube, thereby improving the stability of the vertical movement of the lower tube body;

[0067] The inlet of the exhaust pipe is arranged at the top of the movable sleeve, which can ensure that the gas in the lower tube body is stably transmitted to the exhaust pipe.

[0068] Embodiment 2

[0069] In order to enable the interior of the main chassis to realize the above-mentioned two functions of gas detection and sampling storage, this embodiment provides the following solution:

[0070] In this embodiment, the interior of the air guide seat 9 is separated from top to bottom by an air intake cavity 91, a first side groove 92 and a second side groove 94. The top of the air intake cavity 91 is connected to an air intake connector 95, and the air intake connector 95 is arranged on the surface of the main chassis 1. The outlet end of the exhaust pipe 34 is inserted into the air intake connector 95. A detection exhaust hole 912 is opened on one side of the air intake cavity 91, and a Beta ray probe 9a is installed on the other side. A sampling exhaust hole 911 is opened at the bottom of the air intake cavity 91. The opening directions of the first side groove 92 and the second side groove 94 are opposite. An air guide hole 93 is opened at the top of the second side groove 94. The sampling exhaust hole 911 and the air guide hole 93 are located on the same center line, and the first side groove 92 is arranged between the sampling exhaust hole 911 and the air guide hole 93.

[0071] In the above scheme:

[0072] 1. The exhaust pipe is designed to be installed on the air inlet joint, so that the exhaust pipe can be disassembled and opened when cleaning impurities later. In this way, the blown impurities can be directly discharged to the outdoors through the exhaust pipe;

[0073] 2. The external atmosphere enters the air intake cavity through the exhaust pipe, and the Beta ray probe detects the concentration of atmospheric particulate matter. After the detection is completed, the atmosphere is discharged through the detection exhaust hole;

[0074] 3. Designing the first side groove and the second side groove with opposite openings can facilitate the translation of the air guide adjustment component to control the exhaust process.

[0075] In the present embodiment, the air guide adjustment assembly 6 comprises a vertical plate 61, an air guide tube 66, a spring 64 and a sealing long plate 63. The sealing long plate 63 is horizontally slidably inserted into the first side groove 92. The air guide tube 66 is inverted L-shaped. The horizontal section of the air guide tube 66 is slidably inserted into the second side groove 94. The outer end bottom of the sealing long plate 63 is vertically provided with a vertical plate 61. The vertical plate 61 is slidably sleeved on the guide rod 62. The guide rod 62 is horizontally fixed in the main chassis 1. The bottom end of the vertical plate 61 extends to the composite drive assembly 8. One end of the spring 64 is connected to the inner top surface of the main chassis 1, and the other end is connected to the surface of the sealing long plate 63. The bottom surface of the sealing long plate 63 is connected to the vertical section of the air guide tube 66 through a linkage rod 65. The linkage rod 65 is arranged at the bottom of the air guide seat 9. The top surface of the air guide tube 66 is vertically provided with a side sealing plate 67.

[0076] In the detection state, the sealing long plate 63 is inserted into the first side groove 92 to block the sampling exhaust hole 911, and the side sealing plate 67 is separated from the detection exhaust hole 912;

[0077] In the sampling state, the sealing long plate 63 and the air guide tube 66 move to one side synchronously, the sealing long plate 63 is separated from the sampling exhaust hole 911, and the horizontal section of the air guide tube 66 is inserted into the second side groove 94. The inlet of the air guide tube 66, the air guide hole 93 and the sampling exhaust hole 911 are connected to each other, and the side sealing plate 67 blocks the detection exhaust hole 912.

[0078] In the above scheme:

[0079] 1. The design of the sealed long board can achieve the following effects:

[0080] 1.1. The sealing long plate can be inserted into the first side groove in a translational manner, thereby controlling the passage of the sampling exhaust hole;

[0081] 1.2. When the sealing long plate is moved outward and opened, the sampling exhaust hole can be opened. At the same time, the sealing long plate does not separate from the first side groove, so that the outlet of the sampling exhaust hole is a sealed chamber, and the spring can be stretched to facilitate subsequent resetting and closure;

[0082] 1.3. When the sealing long plate moves outward, it can simultaneously drive the air guide tube to move outward, so that the air guide tube can be aligned and connected with the sampling exhaust hole, and at the same time, the air guide tube can move horizontally to open the elastic sealing plate;

[0083] 2. The air guide tube has a horizontal section and a vertical section. The horizontal section can be inserted into the second side groove to communicate with the air guide hole. The vertical section can conduct gas to the sample collection component and push the sample collection component to open.

[0084] 3. The vertical plate can move laterally along the guide rod, and the vertical plate can cooperate with the composite drive assembly to drive the sealing long plate to move horizontally.

[0085] In this embodiment, the sample collection component 7 includes a sample collecting tube 71, which is rotatably mounted on a support plate 72, and the support plate 72 is fixed in the main chassis 1. The interior of the sample collecting tube 71 is provided with a storage cavity arranged in a circular array, and the top surface of the sample collecting tube 71 is provided with a plurality of air inlet square tubes 73, and each storage cavity corresponds to a group of air inlet square tubes 73 above. The top of the air inlet square tube 73 is provided with an air inlet hole 731, and the top surface of the air inlet square tube 73 is slidably mounted with an elastic sealing plate 74; when the air guide tube 66 is inserted into the second side groove 94, the vertical section of the air guide tube 66 contacts the elastic sealing plate 74 and moves open, so that the air guide tube 66 is connected to the air inlet square tube 73; the mating surface of the elastic sealing plate is a semicircular arc structure, and the cross-section of the air guide tube is a circular structure.

[0086] In the above scheme:

[0087] 1. The sample collecting tube is designed with multiple independent storage chambers, so that air samples at different locations can be stored separately to avoid mutual interference between the atmospheres at different stages and ensure sampling accuracy;

[0088] 2. Under normal conditions, the elastic sealing plate is reset to close the air inlet hole of the air inlet square tube to ensure the sealing of the storage chamber. When sampling, the empty storage chamber is rotated to the sampling position, and then the vertical section of the air guide tube is pushed against the elastic sealing plate and translated to open, and the vertical section of the air guide tube can be connected with the air inlet square tube. In this way, the air sampling channels can be connected in series.

[0089] In this embodiment, the composite drive assembly 8 includes a drive motor 81, a vertical shaft 82 and a support seat 84; the vertical shaft 82 is rotatably placed on the inner bottom surface of the second storage chamber 13, the top of the vertical shaft 82 is connected to the sample collecting tube 71, the outer wall of the vertical shaft 82 is provided with a first gear 821 and a second gear 822, the second gear 822 is provided at the bottom of the first gear 821, and the output end of the drive motor 81 is meshed and connected to the second gear 822; the support seat 84 is provided on the inner bottom surface of the second storage chamber 13, and a rotating plate 85 is symmetrically installed inside the support seat 84 for rotation, and each rotating plate 85 is provided with a rotating plate 85. 5 are symmetrically provided with a resistance plate 851, which is arranged on the outer side of the support seat 84. The inner wall of each rotating plate 85 is provided with a group of fifth gears 852. The interior of the support seat 84 is horizontally rotated through a horizontal rotation shaft 83. The outer end of the horizontal rotation shaft 83 is provided with a third gear 831, and the inner end is provided with a fourth gear 832. The fourth gear 832 is meshed and connected with the two groups of fifth gears 852, and the third gear 831 is meshed and connected with the first gear 821. When the vertical rotation shaft 82 rotates, the sample collecting tube 71 and the resistance plate 851 are synchronously driven to rotate, and the resistance plate 851 resists the vertical plate 61 to move outward.

[0090] In the above scheme:

[0091] The driving motor drives the second vertical gear to rotate, which can drive the vertical shaft to rotate, the vertical shaft drives the first gear and the sample collecting tube to rotate, the first gear drives the third gear to rotate, the third gear drives the horizontal shaft to rotate, the horizontal shaft drives the fifth gear to rotate through the fourth gear, the fifth gear drives the rotating plate to rotate, the rotating plate drives the resistance plate to rotate to resist the vertical plate from moving outward;

[0092] When sampling is completed, the driving motor rotates again to drive the resistance plate to rotate 180° to disengage from the vertical plate. For example, four air intake square tubes are provided. When the resistance plate rotates 180°, the sample collecting tube rotates 45°; the sealing long plate enters the first side groove, the air guide tube disengages from the second side groove, the elastic sealing plate seals the air intake hole again, and the air guide tube rotates to the middle between the two groups of air intake square tubes.

[0093] Embodiment 3

[0094] After a period of detection, some atmospheric particles will adhere to the inner wall of the upper tube body and the lower tube body. In order to clean the upper tube body and the lower tube body without affecting the disassembly of the upper tube body, the main box is lifted as a whole. This embodiment provides the following solution:

[0095] In this embodiment, an upper middle axis rod 43 is coaxially installed inside the upper tube body 41, and the top end of the upper middle axis rod 43 is rotatably connected to an upper triangular plate 46, and the upper triangular plate 46 is fixed to the inner top of the upper tube body 41. The outer wall of the upper middle axis rod 43 is connected to an upper scraper strip 45 through a connecting rod 44, and the upper scraper strip 45 is vertically arranged and fits against the inner wall of the upper tube body 41; a lower slot 431 is provided at the bottom end of the upper middle axis rod 43, and a card slot 4311 is symmetrically provided on the inner wall of the lower slot 431.

[0096] In the above scheme: the upper center axis rod rotates, driving the upper scraper bar to rotate, and the upper scraper bar can clean the attachments on the inner wall of the upper tube body; the upper triangular plate can position the upper center axis rod from the top.

[0097] In this embodiment, a lower middle axis rod 36 is coaxially installed inside the lower tube body 31, and the lower middle axis rod 36 is vertically slidably placed in the supporting middle tube 51. A lower triangular plate 35 is fixedly provided at the top of the lower middle axis rod 36, and the lower triangular plate 35 is placed on the top of the supporting middle tube 51. The outer wall of the lower triangular plate 35 is provided with a lower scraper strip 33 extending vertically downward, and the lower scraper strip 33 is placed between the lower tube body 31 and the supporting middle tube 51, and the movable sleeve 32 is placed at the bottom of the lower scraper strip 33; an insertion shaft 352 is vertically provided at the center of the top surface of the lower triangular plate 35, and an elastic card block 3521 is provided on the outer wall of the insertion shaft 352, and the insertion shaft 352 is inserted into the lower slot 431, and the elastic card block 3521 is inserted into the card slot 4311.

[0098] In the above scheme:

[0099] 1. When the upper tube body and the lower tube body are connected, the plug shaft of the lower middle shaft rod is inserted into the lower slot, and the elastic card block is inserted into the card slot to realize the connection between the upper middle shaft rod and the lower middle shaft rod. When the lower middle shaft rod rotates, it can drive the upper middle shaft rod to rotate;

[0100] 2. When the upper tube body is disassembled, just pull up the upper tube body, the elastic block can be elastically retracted, the plug shaft is separated from the lower slot, and the lower middle shaft rod is separated from the upper middle shaft rod;

[0101] 3. When the lower middle shaft rotates, it will drive the lower scraper to rotate, and the lower scraper can scrape off the attachments on the inner wall of the lower tube;

[0102] 4. When the main chassis is lifted, the lower tube and the upper tube will be driven upward synchronously, and the upper tube will drive the upper and lower middle axis rods to be lifted synchronously, ensuring that the two scrapers can work normally when the main chassis is lifted;

[0103] 5. The lower triangular plate stops at the top of the supporting middle tube to prevent the lower triangular plate and the lower scraper strip from detaching downward.

[0104] In this embodiment, the central axis support assembly 5 also includes a cleaning handle 53 and a driving rod 52. The cleaning handle 53 is vertically provided at the bottom end of the driving rod 52, and the cleaning handle 53 is arranged at the bottom of the floor seat 2. The top of the driving rod 52 is symmetrically provided with a key block 521. The interior of the lower central axis rod 36 is provided with a cross groove 361 adapted to the shape of the driving rod 52. The lower central axis rod 36 is vertically slidably embedded in the cross groove 361. The length of the lower central axis rod 36 is greater than the length of the supporting central tube 51, and the length of the lower central axis rod 36 is less than the length of the supporting central tube 51. The analyzer also includes a fourth state.

[0105] The cleaning handle 53 is rotated to drive the lower scraper bar 33 to rotate and clean the lower tube body 31, and the upper scraper bar 45 to rotate and clean the upper tube body 41; the exhaust pipe 34 is separated from the air inlet connector 95, and the air suction hood 42 exhausts air to blow out the cleaned particles.

[0106] In the above scheme:

[0107] 1. The driving rod is embedded in the cross groove through the key block. The driving rod can rotate through the key block to drive the lower central axis rod to rotate, so as to rotate the cleaning handle from the bottom to scrape off the attachments in the pipe, which is easy to operate. Remove the exhaust pipe in advance, and the wind discharged downward by the suction hood can blow out the cleaned particles, so that the particles are directly discharged outdoors through the exhaust pipe without affecting the air guide seat.

[0108] 2. When the main chassis is lifted, the supporting middle tube and the driving rod remain stationary, and the lower middle axis rod slides upward inside the supporting middle tube.

[0109] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0110] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Portable Beta ray atmospheric particulate matter concentration analyzer, characterized by: It comprises a main box, a touch control main box is arranged on the side wall of the main box, a lower tube assembly is vertically arranged in the middle of the surface of the main box, and the top end of the lower tube assembly is assembled and connected to the atmospheric suction assembly; the atmospheric suction assembly comprises an upper tube body and an air suction cover, the top end of the upper tube body is provided with an air suction cover, the bottom side wall of the upper tube body is provided with an upper assembly plate, the lower tube assembly comprises a lower tube body, the lower tube body is butt-jointed and connected to the bottom of the upper tube body, a lower assembly plate is arranged on the top of the side wall of the lower tube body, and the upper assembly plate and the lower assembly plate are connected as a whole by screws; a central axis support assembly is vertically slidably installed inside the lower tube body, and the lower tube body is fixed to the central axis support assembly by a locking knob; The middle part of the main case is a middle cavity, one side of the middle cavity is an independent first storage cavity, and the other side is an independent second storage cavity. The middle axis support assembly vertically slides through the middle cavity of the main case, and the bottom end of the middle axis support assembly is connected to the floor stand; an air guide seat is installed at the top of the second storage cavity, and the bottom side wall of the lower tube body is connected to the air guide seat through an exhaust pipe. The inside of the air guide seat is provided with a sampling exhaust hole and a detection exhaust hole, and a Beta ray probe is installed inside the air guide seat; an air guide adjustment assembly is installed in the interior of the air guide seat for horizontal sliding, and a sample collection assembly is installed at the bottom of the air guide seat, and a composite drive assembly is installed at the bottom of the second storage cavity; The analyzer has the following working states: In the first state, the air guide adjustment component adjusts the air guide seat to close the sampling exhaust hole and open the detection exhaust hole, and the external air is introduced into the air guide seat through the air suction cover, the upper tube body, the lower tube body and the exhaust pipe, and the Beta ray probe detects atmospheric particulate matter; In the second state, the composite driving assembly synchronously drives the sample collection assembly to rotate and the gas guide adjustment assembly to translate, so that the sampling exhaust hole of the gas guide seat is opened and the detection exhaust hole is closed, and the empty storage cavity in the sample collection assembly is connected to the sampling exhaust hole; In the third state, the upper tube body is separated from the lower tube body, and the atmosphere suction assembly is placed in the first storage chamber.

2. The portable Beta ray atmospheric particulate matter concentration analyzer according to claim 1, characterized in that: The main chassis includes the following modes: in the floor-standing mode, the bottom surface of the main chassis is attached to the floor stand; in the suspended mode, the main chassis is lifted up along the central axis support assembly, so that the main chassis, the lower tube assembly and the atmospheric intake assembly are lifted up and suspended, and the floor stand and the central axis support assembly support the main chassis from the bottom.

3. The portable Beta ray atmospheric particulate matter concentration analyzer according to claim 2, characterized in that: The lower tube assembly also includes a movable sleeve, and the central axis support assembly includes a supporting middle tube, which is vertically fixed to the middle of the surface of the floor seat, and the supporting middle tube slides through the main box and extends into the inner top of the lower tube body. The movable sleeve is slidably sleeved on the outer wall of the supporting middle tube, and the movable sleeve is fixed to the inner bottom of the lower tube body, and the inlet end of the exhaust pipe is connected to the top of the movable sleeve.

4. The portable Beta ray atmospheric particulate matter concentration analyzer according to claim 3 is characterized in that: The interior of the air guide seat is separated from top to bottom by an air intake cavity, a first side groove and a second side groove. The top of the air intake cavity is connected to the air intake joint, and the air intake joint is arranged on the surface of the main chassis. The outlet end of the exhaust pipe is inserted into the air intake joint. A detection exhaust hole is opened on one side of the air intake cavity, and a Beta ray probe is installed on the other side. A sampling exhaust hole is opened at the bottom of the air intake cavity. The opening directions of the first side groove and the second side groove are opposite. An air guide hole is opened at the top of the second side groove. The sampling exhaust hole and the air guide hole are located on the same center line, and the first side groove is arranged between the sampling exhaust hole and the air guide hole.

5. The portable Beta ray atmospheric particulate matter concentration analyzer according to claim 4, characterized in that: The air guide adjustment assembly includes a vertical plate, an air guide tube, a spring and a sealing long plate. The sealing long plate slides horizontally and is inserted into the first side groove. The air guide tube is inverted L-shaped. The horizontal section of the air guide tube slides and is inserted into the second side groove. A vertical plate is vertically arranged at the bottom of the outer end of the sealing long plate. The vertical plate is slidably mounted on the guide rod. The guide rod is horizontally fixed in the main box. The bottom end of the vertical plate extends to the composite drive assembly. One end of the spring is connected to the inner top surface of the main box and the other end is connected to the surface of the sealing long plate. The bottom surface of the sealing long plate is connected to the vertical section of the air guide tube through a linkage rod. The linkage rod is arranged at the bottom of the air guide seat. A side sealing plate is vertically arranged on the top surface of the air guide tube. In the detection state, the sealing long plate is inserted into the first side groove to block the sampling exhaust hole, and the side sealing plate is separated from the detection exhaust hole; In the sampling state, the sealing long plate and the air duct move to one side synchronously, the sealing long plate detaches from the sampling exhaust hole, the horizontal section of the air duct is inserted into the second side groove, the inlet of the air duct, the air hole and the sampling exhaust hole are connected to each other, and the side sealing plate blocks the detection exhaust hole.

6. The portable Beta ray atmospheric particulate matter concentration analyzer according to claim 5, characterized in that: The sample collection component includes a sample collecting tube, which is rotatably mounted on a support plate, and the support plate is fixed in the main chassis. The interior of the sample collecting tube is provided with a storage cavity arranged in a circular array, and the top surface of the sample collecting tube is provided with a plurality of air intake square tubes. Each storage cavity corresponds to a group of air intake square tubes above, and the top of the air intake square tube is provided with an air intake hole, and an elastic sealing plate is slidably mounted on the top surface of the air intake square tube; when the air guide tube is inserted into the second side groove, the vertical section of the air guide tube contacts the elastic sealing plate and moves open, so that the air guide tube is connected with the air intake square tube.

7. The portable Beta ray atmospheric particulate matter concentration analyzer according to claim 6, characterized in that: The composite driving assembly includes a driving motor, a vertical rotating shaft and a supporting seat; the vertical rotating shaft is rotatably arranged on the inner bottom surface of the second storage chamber, the top end of the vertical rotating shaft is connected to the sample collecting tube, the outer wall of the vertical rotating shaft is provided with a first gear and a second gear, the second gear is arranged at the bottom of the first gear, and the output end of the driving motor is meshed and connected to the second gear; the supporting seat is arranged on the inner bottom surface of the second storage chamber, and a rotating plate is symmetrically installed inside the supporting seat for rotation, each rotating plate is symmetrically provided with a resistance plate on the outer wall, the resistance plate is arranged on the outer side of the supporting seat, and each rotating plate is provided with a group of fifth gears on the inner wall, and a transverse rotating shaft is passed through the internal horizontal rotation of the supporting seat, the outer end of the transverse rotating shaft is provided with a third gear, and the inner end is provided with a fourth gear, the fourth gear is meshed and connected to the two groups of fifth gears, and the third gear is meshed and connected to the first gear; when the vertical rotating shaft rotates, the sample collecting tube and the resistance plate are synchronously driven to rotate, and the resistance plate resists the vertical plate to move outward.

8. The portable Beta ray atmospheric particulate matter concentration analyzer according to claim 7, characterized in that: An upper middle axis rod is coaxially installed inside the upper tube body, the top end of the upper middle axis rod is rotatably connected to the upper triangular plate, the upper triangular plate is fixed to the inner top of the upper tube body, the outer wall of the upper middle axis rod is connected to the upper scraper strip through a connecting rod, the upper scraper strip is vertically arranged and fits against the inner wall of the upper tube body; a lower slot is provided at the bottom end of the upper middle axis rod, and a card slot is symmetrically provided on the inner wall of the lower slot.

9. The portable Beta ray atmospheric particulate matter concentration analyzer according to claim 8, characterized in that: A lower middle axis rod is coaxially installed inside the lower tube body, and the lower middle axis rod is vertically slidably placed in the supporting middle tube. A lower triangular plate is fixedly provided on the top end of the lower middle axis rod, and the lower triangular plate is placed on the top of the supporting middle tube. A lower scraper strip extending vertically downward is provided on the outer wall of the lower triangular plate, and the lower scraper strip is placed between the lower tube body and the supporting middle tube, and a movable sleeve is placed on the bottom of the lower scraper strip. An insertion shaft is vertically provided at the center of the top surface of the lower triangular plate, and an elastic card block is provided on the outer wall of the insertion shaft. The insertion shaft is inserted into the lower slot, and the elastic card block is inserted into the card slot.

10. The portable Beta ray atmospheric particulate matter concentration analyzer according to claim 9, characterized in that: The central axis support assembly also includes a cleaning handle and a driving rod, the bottom end of the driving rod is vertically provided with a cleaning handle, the cleaning handle is arranged at the bottom of the floor seat, the top end of the driving rod is symmetrically provided with a key block, the interior of the lower central axis rod is provided with a cross groove adapted to the shape of the driving rod, the lower central axis rod is vertically slidably embedded in the cross groove, the length of the lower central axis rod is greater than the length of the supporting central tube, and the length of the lower central axis rod is less than the length of the supporting central tube; the analyzer also includes a fourth state, The cleaning handle is rotated to drive the lower scraper bar to rotate and clean the lower tube body, and the upper scraper bar is rotated and cleans the upper tube body; the exhaust pipe is separated from the air inlet joint, and the air suction hood exhausts air to blow out the cleaned particles.

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