CN216132779U

CN216132779U - Dust sampler

Info

Publication number: CN216132779U
Application number: CN202122224708.3U
Authority: CN
Inventors: 尉伟明
Original assignee: Zhejiang Tianwei Safety Technology Co ltd
Current assignee: Zhejiang Tianwei Safety Technology Co ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2022-03-25
Anticipated expiration: 2031-09-14

Abstract

The application relates to the technical field of dust sampling equipment, in particular to a dust sampler. A dust sampler comprises a sampler shell, wherein a sampling chamber is integrally formed in the sampler shell, and a sampling head is fixedly communicated with the sampler shell; a dust content measuring mechanism communicated with the sampling head is fixedly connected in the sampling chamber; one end of the dust content measuring mechanism is communicated with the sampling head, and the other end of the dust content measuring mechanism is fixedly communicated with an air purifying mechanism; one end of the air purification mechanism is communicated with the dust content measuring mechanism, and the other end of the air purification mechanism is fixedly communicated with the air extracting pump; the sampler shell is fixedly communicated with an exhaust head; the exhaust head is communicated with the air outlet end of the air pump. This application has carried out purification treatment to the air behind the sampling survey dust concentration, has avoided having better environmental protection nature to atmospheric secondary pollution.

Description

Dust sampler

Technical Field

The application relates to the technical field of dust sampling equipment, in particular to a dust sampler.

Background

The dust sampler is an instrument for collecting a dust sample in dust-containing air. The dust concentration in the air is measured, on one hand, the requirement of safety production management is met, on the other hand, the requirement of scientific research is reflected, and corresponding scientific basis is provided for researching dustproof, dust fall and dust removal measures. At present, the method for measuring the dust concentration in the air by using a dust sampler is a currently accepted measuring method with higher accuracy. Therefore, the dust sampler is widely applied to health monitoring and evaluation in departments of disease prevention, environmental monitoring, scientific research and teaching and the like.

At present, after the dust sampler in the related art measures the dust concentration of the sampled air, the sampled air is directly discharged into the atmospheric environment, so that the atmosphere is polluted. Therefore, the related art has a problem of poor environmental protection.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the environmental protection is poor in the prior art, the application provides a dust sampler.

The application provides a dust sampler is realized through following technical scheme:

a dust sampler comprises a sampler shell, wherein a sampling chamber is integrally formed in the sampler shell, and a sampling head is fixedly communicated with the sampler shell; a dust content measuring mechanism communicated with the sampling head is fixedly connected in the sampling chamber; one end of the dust content measuring mechanism is communicated with the sampling head, and the other end of the dust content measuring mechanism is fixedly communicated with an air purifying mechanism; one end of the air purification mechanism is communicated with the dust content measuring mechanism, and the other end of the air purification mechanism is fixedly communicated with the air extracting pump; the sampler shell is fixedly communicated with an exhaust head; the exhaust head is communicated with the air outlet end of the air pump.

Through adopting above-mentioned technical scheme, the examination air that awaits measuring gets into dust content survey mechanism survey dust concentration through the sampling head under the effect of air-bleed pump, and air purification mechanism can carry out purification treatment to the air after the sampling survey dust concentration, has avoided atmospheric secondary pollution, and the air through air purification mechanism is through the exhaust head emission at atmospheric environment, and consequently, this application has better feature of environmental protection, has avoided atmospheric secondary pollution.

Preferably, the air purification mechanism comprises a filter, a first transmission pipeline and a second transmission pipeline, one end of the first transmission pipeline is communicated with the dust content measurement mechanism, and the other end of the first transmission pipeline is fixedly communicated with the air inlet end of the filter; one end of the second transmission pipeline is fixedly communicated with the air outlet end of the filter, and the other end of the second transmission pipeline is fixedly communicated with the air inlet end of the air pump.

By adopting the technical scheme, the air after the dust concentration is sampled and measured is purified by the filter, so that secondary pollution to the atmosphere is avoided, the filter is easy to clean and maintain, and the use cost can be reduced.

Preferably, the filter comprises a filter shell, a first filter screen and a second filter screen which are fixedly connected to the inner wall of the filter shell in sequence along the gas flow direction; the mesh number of the first filtering screen is 500-800 meshes; the mesh number of the second filtering screen is 1200-2000 meshes.

Through adopting above-mentioned technical scheme, through adopting first filter screen, second filter screen to filter the air after the sampling survey dust concentration, can effectively reduce the dust content in the air after purifying for air-purifying accords with the ring and arranges the standard, avoids the secondary pollution to atmosphere.

Preferably, the dust content measuring mechanism comprises an outer shell, a connecting bent pipe fixedly connected to the inside of the outer shell, a dust intercepting component, a dust quality measuring component and a dust collecting box, wherein one end of the connecting bent pipe is communicated with the sampling head, and the other end of the connecting bent pipe is communicated with the dust intercepting component; the dust intercepting component is communicated with the first transmission pipeline; the dust quality measuring component is communicated with the dust intercepting component; the dust collecting box is communicated with the dust quality measuring component.

Through adopting above-mentioned technical scheme, not only can comparatively accurate survey the content of dust in the air, can collect the dust moreover, avoid appearing secondary atmosphere pollution.

Preferably, the dust intercepting component comprises an intercepting pipe, a dust filtering screen plate and a vibrating motor, wherein one end of the intercepting pipe is communicated with the connecting bent pipe, and the other end of the intercepting pipe is communicated with the first transmission pipeline; the dust filter screen plate is fixedly connected inside the intercepting pipe; the vibration motor is fixedly connected with the surface center of the dust filter screen plate facing the first transmission pipeline; the dust filter screen plate is integrally formed with a plurality of filter pore channels; the side wall of the bottom of the intercepting pipe is fixedly communicated with a dust collecting pipe; the dust collecting pipe is positioned at the upstream of the dust filter screen plate along the air flowing direction; one end of the dust collecting pipe is fixedly communicated with the side wall of the bottom of the intercepting pipe, and the other end of the dust collecting pipe is communicated with the dust collecting cover; the dust collecting cover is communicated with a flushing and collecting component.

Through adopting above-mentioned technical scheme, can effectively collect the dust that is detained on the dirt otter board to the guarantee determines the precision of air dust content.

Preferably, the dust mass measurement assembly comprises a weighing module and a gasket body, and the gasket body is fixedly connected to the gravity sensing end of the weighing module; one end of the cushion lining body is open and the other end is closed; the opening of the gasket body is hermetically communicated with the dust collection cover; the bottom of the pad body is communicated with a dust exhaust pipe; one end of the dust exhaust pipe is communicated with the bottom of the gasket body, and the other end of the dust exhaust pipe is communicated with the top of the dust collecting box; the dust collecting box is communicated with an air pressure balance pipe; the bottom of the dust collecting box is detachably connected with a first sealing cover; the bottom of the sampler shell is detachably connected with a second sealing cover; the vertical projection of the first cover falls within the vertical projection of the second cover.

Through adopting above-mentioned technical scheme, not only ensured the precision of survey air dust content, can effectively collect the dust in the pad lining moreover, avoid dust secondary pollution environment.

Preferably, the flushing and collecting assembly comprises an air blowing pump, an air inlet pipe and an air outlet pipe, one end of the air inlet pipe is fixedly communicated with the air inlet end of the air blowing pump, and the other end of the air inlet pipe penetrates through the sampler shell to be communicated with the outside; one end of the air outlet pipe is fixedly communicated with the air outlet end of the air blowing pump; the side wall of the air outlet pipe is communicated with an air blowing pipe; one end of the air blowing pipe is communicated with the side wall of the air outlet pipe, and the other end of the air blowing pipe is communicated with the side wall of the dust collection cover.

By adopting the technical scheme, the dust in the gasket is effectively collected, and the secondary pollution of the dust to the environment is avoided.

Preferably, one end of the air outlet pipe is fixedly communicated with the air outlet end of the air blowing pump, and the other end of the air outlet pipe is fixedly communicated with the side wall of the second transmission pipeline; the air outlet pipe is fixedly communicated with a first control valve; the communication position of the air blowing pipe and the air outlet pipe is positioned at the upstream of the first control valve; the second transmission pipeline is fixedly communicated with a second control valve; the communication part of the air outlet pipe and the second transmission pipeline is positioned between the second control valve and the filter; the first transmission pipeline is fixedly communicated with a third control valve; the outer wall of the first transmission pipeline is fixedly communicated with a back-flushing pipe; the back flushing pipe is fixedly communicated with a fourth control valve; one end of the back flushing pipe is communicated with the periphery of the first transmission pipeline, and the other end of the back flushing pipe is fixedly communicated with a flushing dust collecting box; the top of the dust washing collecting box is fixedly communicated with a balance air pressure pipe; one end of the balance air pressure pipe is communicated with the top of the flushing dust collection box, and the other end of the balance air pressure pipe penetrates through the sampler shell to be communicated with the outside.

By adopting the technical scheme, the filter can be backwashed, the air purification efficiency can be improved, and the quality of the air purified by the filter is ensured.

In summary, the present application has the following advantages:

1. this application has carried out purification treatment to the air behind the sampling survey dust concentration, has avoided having better environmental protection nature to atmospheric secondary pollution.

2. This application can carry out the back flush to the filter, can promote air purification's efficiency, guarantees the quality through filter air-purifying.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application, mainly showing an external structure.

Fig. 2 is a schematic overall structure diagram of the embodiment of the present application, mainly showing the internal structure.

Fig. 3 is a schematic structural view of a dust content measuring mechanism in the embodiment of the present application.

Fig. 4 is a schematic view showing a connection structure of the air cleaning mechanism, the suction pump and the flushing collection unit in the embodiment of the present application.

In the figure, 1, a sampler housing; 10. a sampling chamber; 11. a sampling head; 12. a second cover; 13. an exhaust head; 14. a handle; 2. a dust content measuring mechanism; 21. an outer housing; 22. connecting a bent pipe; 23. a dust intercepting component; 231. intercepting a pipe; 2311. a dust collecting pipe; 2312. a dust collection cover; 232. a dust filter screen plate; 233. a vibration motor; 234. a filtration pore channel; 24. a dust mass determination assembly; 241. a weighing module; 242. a cushion body; 243. a dust exhaust pipe; 2431. a fifth control valve; 25. a dust collection box; 251. a pressure balance tube; 252. a first cover; 3. an air purification mechanism; 31. a filter; 311. a filter housing; 312. a first filter screen; 313. a second filter screen; 32. a first transfer conduit; 321. a third control valve; 33. a second transport pipe; 331. a second control valve; 4. an air pump; 5. flushing the collection assembly; 51. an air blower; 52. an air inlet pipe; 521. a first dust joint; 53. an air outlet pipe; 531. a first control valve; 54. an air blowing pipe; 541. a sixth control valve; 6. a backwash pipe; 61. a fourth control valve; 62. washing the dust collection box; 621. filtering the sponge; 63. and a balance pressure pipe.

Detailed Description

The present application is described in further detail below with reference to figures 1-4 and examples.

Referring to fig. 1 and 2, a dust sampler disclosed in the present application includes a sampler housing 1, a sampling head 11, a dust content measuring mechanism 2, an air purifying mechanism 3, an air pump 4, and an exhaust head 13. Wherein the sampler housing 1 is integrally formed with a sampling chamber 10. In order to facilitate carrying, a handle 14 is fixedly connected to the upper surface of the sampler shell 1. The dust content measuring mechanism 2, the air purifying mechanism 3 and the air suction pump 4 are located inside the sampling chamber 10, and the sampling head 11 and the exhaust head 13 are located outside the sampling chamber 10. The dust content measuring mechanism 2 is communicated with the sampling head 11 and also communicated with the air purifying mechanism 3. One end of the air purification mechanism 3 is fixedly communicated with the dust content measuring mechanism 2, and the other end of the air purification mechanism 3 is fixedly communicated with the air inlet end of the air suction pump 4. The air outlet end of the air pump 4 is fixedly communicated with an exhaust head 13 through a pipeline.

The air that awaits measuring gets into dust content measurement mechanism 2 through sampling head 11 and carries out the dust content survey under the effect of aspiration pump 4, and the air current that accomplishes the survey has realized the purification treatment to the air through air purification mechanism 3, has avoided atmosphere secondary pollution, and the air current that purifies through air purification mechanism 3 discharges to external atmosphere from exhaust head 13 through aspiration pump 4.

Referring to fig. 2 and 3, the empty dust content measuring mechanism 2 includes an outer housing 21, a connecting elbow 22, a dust intercepting assembly 23, a dust quality measuring assembly 24, a dust collecting box 25, and a flushing collecting assembly 5. The outer housing 21 and the flush collection assembly 5 are fixedly attached to the sampling chamber 10 within the sampler housing 1. The connecting elbow 22, the dust intercepting component 23, the dust quality measuring component 24 and the dust collecting box 25 are fixedly connected to the inside of the outer shell 21. One end of the connecting bent pipe 22 is fixedly communicated with the sampling head 11, and the other end of the connecting bent pipe 22 is fixedly communicated with the dust intercepting component 23. The dust intercepting component 23 is communicated with the air purifying mechanism 3 and also communicated with the dust quality measuring component 24. The dust collection box 25 is communicated with the dust quality measuring assembly 24 and is used for collecting the quantified dust. The flushing collection unit 5 is used to blow the dust metered in the dust quality measuring unit 24 into the dust collection box 25, thereby facilitating the collection and processing of the dust.

Referring to fig. 3, the empty dust intercepting component 23 includes an intercepting pipe 231, a dust filter screen 232 and a vibration motor 233, wherein an air inlet end of the intercepting pipe 231 is fixedly communicated with the connection elbow 22, and an air outlet end of the intercepting pipe 231 is fixedly communicated with the air purifying mechanism 3. The dust screen 232 is fixedly connected to the inner wall of the intercepting pipe 231 for intercepting dust in the stagnant air. The center of the surface of the dust filter screen plate 232 is not provided with a hole for fixedly connecting the vibration motor 233, and the vibration motor 233 is fixedly connected to the center of the surface of the dust filter screen plate 232 facing the air purification mechanism 3. The screen 232 is integrally formed with a plurality of filter openings 234. The bottom side wall of the intercepting pipe 231 is fixedly communicated with a dust collecting pipe 2311, and dust trapped by the dust filter screen plate 232 flows into the dust quality measuring assembly 24 through the dust collecting pipe 2311. The dust collecting pipe 2311 is located at the upstream of the dust filter screen plate 232 along the air flowing direction, one end of the dust collecting pipe 2311 is fixedly communicated with the bottom side wall of the intercepting pipe 231, and the other end of the dust collecting pipe 2311 is communicated with a dust hood 2312 communicated with the flushing and collecting assembly 5.

Referring to fig. 4 and fig. 2, the washing and collecting assembly 5 includes an air blowing pump 51, an air inlet pipe 52 and an air outlet pipe 53, wherein one end of the air inlet pipe 52 is fixedly communicated with the air inlet end of the air blowing pump 51, and the other end of the air inlet pipe 52 penetrates through the sampler housing 1 and is communicated with the outside. In order to avoid the blockage of the intake pipe 52, a first dust joint 521 is fixedly communicated with one end of the intake pipe 52 communicated with the outside. One end of the air outlet pipe 53 is fixedly communicated with the air outlet end of the air blowing pump 51, and the other end of the air outlet pipe 53 is fixedly communicated with the side wall of the second transmission pipeline 33. The air outlet pipe 53 is fixedly communicated with a first control valve 531, and the first control valve 531 is an electromagnetic valve. An air blowing pipe 54 is fixedly communicated with the side wall of the air outlet pipe 53, and the communication position of the air blowing pipe 54 and the air outlet pipe 53 is positioned at the upstream of the first control valve 531. One end of the air blowing pipe 54 is fixedly communicated with the side wall of the air outlet pipe 53, and the other end of the air blowing pipe 54 is fixedly communicated with the side wall of the dust collection cover 2312, so that the pipe orifice of the air blowing pipe 54 is inclined downwards by 45 degrees and faces the horizontal plane of the dust quality measuring assembly 24. The blowing pipe 54 is fixedly communicated with a sixth control valve 541, and the sixth control valve 541 is an electromagnetic valve.

Referring to fig. 3 and 4, the dust mass measuring assembly 24 includes a weighing module 241 and a spacer 242, one end of the spacer 242 is open, and the other end of the spacer 242 is closed. The bottom surface of the gasket body 242 is fixedly connected to the gravity sensing end of the weighing module 241. The opening end of the gasket 242 is hermetically connected to the dust collection cover 2312, that is, the outer diameter of the gasket 242 is equal to the inner diameter of the dust collection cover 2312, and lubricating oil is stored between the outer wall of the gasket 242 and the inside of the dust collection cover 2312 for sealing. The bottom of the cushion body 242 is fixedly communicated with a dust exhaust pipe 243. One end of the dust exhaust pipe 243 close to the padding body 242 is fixedly communicated with a fifth control valve 2431, and the fifth control valve 2431 is an electromagnetic valve. One end of the dust exhaust pipe 243 is fixedly communicated with the bottom of the pad 242, and the other end of the dust exhaust pipe 243 is fixedly communicated with the top of the dust collection box 25.

Referring to fig. 3 and 2, in order to balance the internal and external air pressures of the dust collection box 25, the dust collection box 25 is fixedly communicated with an air pressure balance pipe 251. One end of the air pressure balance tube 251 is downward inserted into the outer shell 21 and the sampler shell 1 to be communicated with the outside, and the other end of the air pressure balance tube 251 is positioned at the upper part inside the balance dust collection box 25. The bottom of the dust collection box 25 is connected with a first sealing cover 252 through a bolt, the bottom of the sampler shell 1 is connected with a second sealing cover 12 through a bolt, the vertical projection of the first sealing cover 252 falls into the vertical projection of the second sealing cover 12, and dust in the dust collection box 25 can be cleaned by detaching the first sealing cover 252 and the second sealing cover 12.

Referring to fig. 4, in order to clean the filter 31, a second control valve 331 is fixedly communicated with the second transfer pipe 33, and the second control valve 331 is an electromagnetic valve. The place where the outlet pipe 53 communicates with the second transfer pipe 33 is located between the second control valve 331 and the filter 31. The first transmission line 32 is fixedly communicated with a third control valve 321, and the third control valve 321 is an electromagnetic valve. The outer wall of the first transmission pipeline 32 is vertically and fixedly communicated with a back-flushing pipe 6. The back-flushing pipe 6 is fixedly communicated with a fourth control valve 61, and the fourth control valve 61 is an electromagnetic valve. One end of the back flushing pipe 6 is fixedly communicated with the peripheral outer wall of the first transmission pipeline 32, the other end of the back flushing pipe 6 is fixedly communicated with a flushing dust collecting box 62, and the flushing dust collecting box 62 is fixedly connected in the sampler shell 1. The fixed intercommunication in top of washing dust collection box 62 has balanced pneumatic tube 63, and balanced pneumatic tube 63 one end is fixed to be communicated in washing the top of dust collection box 62, and fixed intercommunication in the fixed intercommunication of one end of washing dust collection box 62 has filtering sponge 621, filters sponge fixed connection in washing the top in the dust collection box 62. The other end of the balance air pressure pipe 63 penetrates through the sampler shell 1 to be communicated with the outside.

Referring to fig. 4, the air cleaning mechanism 3 includes a filter 31, a first transmission pipeline 32 and a second transmission pipeline 33, and the filter 31 is composed of a filter housing 311, a first filter screen 312 and a second filter screen 313 which are fixedly connected to the inner wall of the filter housing 311 in sequence along the gas flow direction. The number of the first filter screen 312 is 600 meshes, and dust with the granularity larger than 600 meshes can be filtered; the second filter screen 313 has a mesh size of 1500 meshes and can filter dust with a particle size of more than 1500 meshes. One end of the first transmission pipeline 32 is fixedly communicated with the air inlet end of the filter housing 311, and the other end of the first transmission pipeline 32 is fixedly communicated with the air outlet end of the intercepting pipe 231. One end of the second transmission pipeline 33 is fixedly communicated with the air outlet end of the filter housing 311, and the other end of the second transmission pipeline 33 is fixedly communicated with the air inlet end of the air pump 4.

The dust concentration measurement of the present application was calculated according to the following formula.

The formula is as follows: c = { (W2-W1)/(Q × t) } 1000, where C is the concentration of dust (mg/m 3), W1 is the mass (mg) displayed by the weight module 241 before sampling and W2 is the mass (mg) displayed by the weight module 241 after sampling; t is the sampling time (min); q is the sampling flow rate (L/min).

In the application, the back washing operation of the filter 31 is performed, the sixth control valve 541, the second control valve 331 and the third control valve 321 are closed, the fourth control valve 61 and the first control valve 531 are opened, the air blowing pump 51 is opened, and the dust in the filter 31 is blown into the dust flushing collection box 62, so that the purpose of back washing and cleaning the filter 31 is realized.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A dust sampler comprises a sampler shell (1), wherein a sampling chamber (10) is integrally formed in the sampler shell (1), and the dust sampler is characterized in that: the sampler shell (1) is fixedly communicated with a sampling head (11); a dust content measuring mechanism (2) communicated with the sampling head (11) is fixedly connected in the sampling chamber (10); one end of the dust content measuring mechanism (2) is communicated with the sampling head (11), and the other end is fixedly communicated with the air purifying mechanism (3); one end of the air purification mechanism (3) is communicated with the dust content measuring mechanism (2), and the other end is fixedly communicated with the air extraction pump (4); the sampler shell (1) is fixedly communicated with an exhaust head (13); the exhaust head (13) is communicated with the air outlet end of the air pump (4).

2. A dust sampler as claimed in claim 1, wherein: the air purification mechanism (3) comprises a filter (31), a first transmission pipeline (32) and a second transmission pipeline (33), one end of the first transmission pipeline (32) is communicated with the dust content measuring mechanism (2), and the other end of the first transmission pipeline (32) is fixedly communicated with the air inlet end of the filter (31); one end of the second transmission pipeline (33) is fixedly communicated with the air outlet end of the filter (31) and the other end is fixedly communicated with the air inlet end of the air pump (4).

3. A dust sampler as claimed in claim 2, wherein: the filter (31) comprises a filter shell (311), a first filtering screen (312) and a second filtering screen (313), wherein the first filtering screen and the second filtering screen are fixedly connected to the inner wall of the filter shell (311) in sequence along the gas flow direction; the mesh number of the first filtering screen (312) is 500-800 meshes; the mesh number of the second filtering screen (313) is 1200 meshes and 2000 meshes.

4. A dust sampler as claimed in claim 3, wherein: the dust content measuring mechanism (2) comprises an outer shell (21), a connecting bent pipe (22) fixedly connected to the inside of the outer shell (21), a dust intercepting component (23), a dust quality measuring component (24) and a dust collecting box (25), wherein one end of the connecting bent pipe (22) is communicated with the sampling head (11), and the other end of the connecting bent pipe is communicated with the dust intercepting component (23); the dust intercepting component (23) is communicated with the first transmission pipeline (32); the dust quality measuring component (24) is communicated with the dust intercepting component (23); the dust collection box (25) is communicated with the dust quality measuring component (24).

5. A dust sampler as claimed in claim 4, wherein: the dust intercepting component (23) comprises an intercepting pipe (231), a dust filtering screen plate (232) and a vibrating motor (233), one end of the intercepting pipe (231) is communicated with the connecting bent pipe (22), and the other end of the intercepting pipe is communicated with the first transmission pipeline (32); the dust filter screen plate (232) is fixedly connected inside the intercepting pipe (231); the vibration motor (233) is fixedly connected with the surface center of the dust filter screen plate (232) facing the first transmission pipeline (32); the dust filter screen plate (232) is integrally formed with a plurality of filter hole channels (234); the side wall of the bottom of the intercepting pipe (231) is fixedly communicated with a dust collecting pipe (2311); the dust collecting pipe (2311) is positioned at the upstream of the dust filter screen plate (232) along the air flowing direction; one end of the dust collecting pipe (2311) is fixedly communicated with the side wall of the bottom of the intercepting pipe (231), and the other end of the dust collecting pipe is communicated with a dust collecting cover (2312); the dust collection cover (2312) is communicated with a flushing and collecting assembly (5).

6. A dust sampler as claimed in claim 5, wherein: the dust mass measurement assembly (24) comprises a weighing module (241) and a gasket body (242), wherein the gasket body (242) is fixedly connected to the gravity sensing end of the weighing module (241); one end of the padding body (242) is open and the other end is closed; the opening of the gasket body (242) is communicated with the dust collection cover (2312) in a sealing way; the bottom of the cushion lining body (242) is communicated with a dust exhaust pipe (243); one end of the dust exhaust pipe (243) is communicated with the bottom of the gasket body (242), and the other end is communicated with the top of the dust collection box (25); the dust collecting box (25) is communicated with an air pressure balance pipe (251); the bottom of the dust collection box (25) is detachably connected with a first sealing cover (252); the bottom of the sampler shell (1) is detachably connected with a second sealing cover (12); the vertical projection of the first cover (252) falls within the vertical projection of the second cover (12).

7. A dust sampler as claimed in claim 5, wherein: the washing and collecting assembly (5) comprises an air blowing pump (51), an air inlet pipe (52) and an air outlet pipe (53), one end of the air inlet pipe (52) is fixedly communicated with the air inlet end of the air blowing pump (51), and the other end of the air inlet pipe (52) penetrates through the sampler shell (1) to be communicated with the outside; one end of the air outlet pipe (53) is fixedly communicated with the air outlet end of the air blowing pump (51); the side wall of the air outlet pipe (53) is communicated with an air blowing pipe (54); one end of the air blowing pipe (54) is communicated with the side wall of the air outlet pipe (53), and the other end of the air blowing pipe (54) is communicated with the side wall of the dust hood (2312).

8. A dust sampler as claimed in claim 7, wherein: one end of the air outlet pipe (53) is fixedly communicated with the air outlet end of the air blowing pump (51), and the other end of the air outlet pipe is fixedly communicated with the side wall of the second transmission pipeline (33); the air outlet pipe (53) is fixedly communicated with a first control valve (531); the communication position of the air blowing pipe (54) and the air outlet pipe (53) is positioned at the upstream of the first control valve (531); the second conveying pipeline (33) is fixedly communicated with a second control valve (331); the communication position of the air outlet pipe (53) and the second transmission pipeline (33) is positioned between the second control valve (331) and the filter (31); the first transmission pipeline (32) is fixedly communicated with a third control valve (321); a back flushing pipe (6) is fixedly communicated with the outer wall of the first transmission pipeline (32); a fourth control valve (61) is fixedly communicated with the backwashing pipe (6); one end of the backwashing pipe (6) is communicated with the peripheral side of the first transmission pipeline (32), and the other end is fixedly communicated with a flushing dust collecting box (62); the top of the dust washing collecting box (62) is fixedly communicated with a balance air pressure pipe (63); one end of the balance air pressure pipe (63) is communicated with the top of the flushing dust collecting box (62), and the other end of the balance air pressure pipe penetrates through the sampler shell (1) to be communicated with the outside.