CN215953126U

CN215953126U - Air sampler

Info

Publication number: CN215953126U
Application number: CN202121093962.8U
Authority: CN
Inventors: 谢泽平; 谢长龙; 胡华山; 秦朋; 何童玺; 张静; 贺巧丽; 黄艳梅; 吴继萍; 阳凤仙; 邓丛梅; 余雄; 王沐雨
Original assignee: Hubei Jixiang Safety Technology Service Co ltd
Current assignee: Hubei Jixiang Safety Technology Service Co ltd
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2022-03-04
Anticipated expiration: 2031-05-21

Abstract

The utility model discloses an air sampler, which comprises a shell, wherein a first inner cavity is arranged in the shell, a first air inlet communicated with the first inner cavity is arranged on the outer side of the shell, a gas collecting barrel is arranged in the first inner cavity, the outer side wall of the gas collecting barrel is fixedly connected with the inner side wall of the first inner cavity through a screen, a second inner cavity capable of containing gas is arranged in the gas collecting barrel, a first driving mechanism capable of driving the gas to enter or discharge the gas from the second inner cavity is connected in the second inner cavity in a sliding manner, a second air inlet capable of allowing the gas to enter the second inner cavity is arranged on the lower end face of the gas collecting barrel, a first one-way valve structure is arranged above the second air inlet at the lower end of the second inner cavity, the inner side wall of the lower end of the second inner cavity is communicated with the outer side wall of the shell through a first exhaust pipe, a second one-way valve structure is arranged in the first exhaust pipe, the inner side wall of the upper end of the second inner cavity is communicated with the outer side wall of the shell through a second exhaust pipe, and a water seal structure is arranged on the lower end face of the gas collecting barrel, the water seal structure is communicated with the second air inlet.

Description

Air sampler

Technical Field

The utility model relates to the technical field of air sampling, in particular to an air sampler.

Background

The air sampler is a common instrument for the atmospheric environment of the mobile phone and the field gas of the workshop, is widely applied to units for atmospheric environment monitoring, health epidemic prevention, labor protection, scientific research and the like, and can also be matched with related instruments. By analyzing the sampled gas, the degree of atmospheric pollution in the environment is known, and the actual condition of pollution is provided for relevant departments, so that countermeasures are taken, and the healthy living environment of people is guaranteed.

The air sampler in the prior art has the following defects that an electric air pump is arranged in a body of the sampler and is used for pumping gas into the sampler, and the structure comprises: 1. the structure is heavy and inconvenient to carry; 2. need provide the power for electronic aspiration pump, the power provides just becomes difficult problem when the open air is gathered, adds the air sampler after establishing electronic aspiration pump troublesome poeration when the sampling moreover, still wastes the electric quantity simultaneously.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides the air sampler which has a simple structure, is convenient to carry and can realize air collection without a power supply.

The utility model relates to an air sampler, which comprises a shell, wherein a first inner cavity is arranged in the shell, a first air inlet communicated with the first inner cavity is arranged on the outer side of the shell, a gas collecting barrel is arranged in the first inner cavity, the outer side wall of the gas collecting barrel is fixedly connected with the inner side wall of the first inner cavity through a screen, a second inner cavity capable of containing gas is arranged in the gas collecting barrel, a first driving mechanism capable of driving the gas to enter or discharge the gas from the second inner cavity is connected in the second inner cavity in a sliding manner, a second air inlet capable of allowing the gas to enter the second inner cavity is arranged on the lower end face of the gas collecting barrel, a first one-way valve structure is arranged above the second air inlet at the lower end of the second inner cavity, the inner side wall of the lower end of the second inner cavity is communicated with the outer side wall of the shell through a first exhaust pipe, a second one-way valve structure is arranged in the first exhaust pipe, the upper end face of the inner side wall of the second inner cavity is communicated with the outer side wall of the shell through a second exhaust pipe, a water seal structure is arranged on the lower end face of the gas collecting barrel, the water seal structure is communicated with the second air inlet.

Compared with the existing air sampler, the air sampler in the technical scheme can finish the collection of gas under the condition of no electricity participation. The structure is more simple and convenient, and the production cost is lower than that of an electric air pump.

After the air sampler in the scheme of the machine is placed on the collection point, a user only needs to grasp the shell and slide the shell downwards, and then the collection of the air in the collection point can be realized.

When the air sampler in the technical scheme is placed on the table top, the lower end face of the base below the shell can be attached to the table top. When a user slides the table top of the shell, the outer side wall of the gas collecting barrel is fixedly connected with the shell through the screen, when the shell slides downwards, the sliding sheet positioned in the gas collecting barrel can slide upwards in the second inner cavity relatively, at the moment, gas on the upper half part of the second inner cavity is extruded by the sliding sheet and is exhausted out of the outer side wall of the shell through the second exhaust pipe on the upper end of the second inner cavity, negative pressure is generated due to the fact that the sliding sheet slides upwards when gas on the lower half part of the second inner cavity, at the moment, gas outside the shell can enter the first inner cavity and enter the first gap on the lower end of the second inner cavity through the water sealing structure of the first inner cavity, when the gas passes through the water sealing structure, liquid in the U-shaped pipeline and the gas entering the water sealing structure can slide towards the first gap together until the liquid and the gas enter the first gap simultaneously. At the moment, the sliding sheet continuously slides upwards, the gas in the first gap pushes the first ball body to slide upwards in the first cover body until the first ball body no longer seals the third air inlet, and at the moment, the gas in the first gap can enter the second inner cavity above the first check valve structure through the first check valve structure. When the shell does not slide downwards any more, namely the sliding sheet does not move upwards relatively in the second inner cavity any more, the first spring of the first check valve structure pushes the first ball body to slide towards the third air inlet until the first ball body is tightly attached to the inner side wall of the third air inlet, so that the third air inlet is sealed through the first ball body.

When the gas in the second inner cavity needs to be exhausted, the exhaust pipe is communicated with the first exhaust pipe extending out of the outer side wall of the shell, and the shell slides towards the direction back to the table surface, namely the shell slides upwards. At the moment, the gas collecting barrel in the shell also slides upwards along with the gas collecting barrel, and the sliding sheet in the second inner cavity slides downwards relatively. When the sliding plate slides downwards, the gas in the lower half part of the second inner cavity is compressed by the extrusion of the sliding plate. Because the first check valve structure of the second inner cavity is a structure which only allows gas to enter the second cavity from the first gap, when the lower half part of the gas in the second inner cavity is extruded, the compressed gas can push the first ball to move downwards, so that the first ball and the third gas inlet are more closely attached, and therefore the gas cannot flow into the first gap from the first check valve and cannot enter the first inner cavity through the water seal structure. When the gas of second inner chamber the latter half was compressed to a certain extent, when the atmospheric pressure of second inner chamber the latter half can be opened the second check valve structure in the first exhaust pipe promptly, gas just can be discharged through first exhaust pipe. When the air in the second inner cavity is compressed to a certain air pressure, the air pushes the second ball in the first exhaust pipe to slide towards the first fixing piece. When the outer side wall of the second sphere is not abutted to the seventh through hole of the side wall of the annular bulge any longer, the compressed gas in the second inner cavity flows through the seventh through hole in the first exhaust pipe, passes through the fourth through hole of the side wall of the first fixing piece through the second gap and flows into the external exhaust pipe.

As a preference: the lower end face of the shell is provided with a first through hole, the center of the bottom face of the second inner cavity is provided with a first columnar bulge, the center of the upper end face of the first columnar bulge is provided with a second through hole communicated with the lower end face of the gas collecting barrel, the first driving mechanism comprises a sliding sheet longitudinally connected in the second inner cavity in a sliding manner, the lower end face of the sliding sheet is fixedly connected with a first connecting rod, the lower end of the first connecting rod penetrates through the second through hole and the first through hole and is fixedly connected with a base arranged below the shell, the outer side wall of the sliding sheet is circumferentially provided with a sealing ring, the outer side wall of the sealing ring is attached to the inner side wall of the second inner cavity, a first one-way valve structure only allowing gas to enter the second inner cavity from a second gas inlet is arranged between the outer side wall of the first columnar bulge and the inner side wall of the second inner cavity, the first one-way valve structure is arranged above the second gas inlet, the second inner side wall of the second inner cavity between the lower end face of the sliding sheet and the first one-way valve structure is communicated with the outer side wall of the shell through a first gas exhaust pipe, a first gap capable of containing liquid in the water seal structure is reserved between the first one-way valve structure and the bottom surface of the second inner cavity.

As a preference: the water seal structure comprises a U-shaped pipeline which is fixedly connected to the lower end face of the gas collecting barrel and is communicated with the two ends of the lower end face of the gas collecting barrel, one end of the U-shaped pipeline is communicated with the second gas inlet hole, one end, far away from the second gas inlet hole, of the U-shaped pipeline extends into the first inner cavity, and the horizontal height, far away from the opening at one end of the second gas inlet hole, of the U-shaped pipeline is equal to the horizontal height of the second gas inlet hole.

As a preference: protruding lateral wall circumference of first column is equipped with cyclic annular chassis, cyclic annular chassis lateral wall and second inner chamber inside wall integrated into one piece, the inside wall and the protruding lateral wall integrated into one piece of first column of cyclic annular chassis centre bore, the terminal surface is equipped with a plurality of third air intakes that can supply the gas to get into the second inner chamber from first clearance under the cyclic annular chassis, cyclic annular chassis up end is equipped with the first check valve structure that a plurality of steerable third air intakes opened or closed, first check valve structure is including covering the first cover body of locating cyclic annular chassis up end, be equipped with first spheroid under the first cover body between terminal surface and the third air intake, terminal surface under the first spheroid lateral wall passes through first spring coupling first cover body, cover body lateral wall is equipped with the third through-hole that can supply the air current to get into the second inner chamber, first cover body down terminal surface and cyclic annular chassis up end integrated into one piece.

As a preference: the second check valve structure is including vertically locating the first stationary blade of first blast pipe inside wall, and first stationary blade lateral wall transversely is equipped with the fourth through-hole that can supply the gas flow, and first stationary blade is close to second inner chamber one end and has the second spheroid through second spring elastic connection, and first blast pipe inside wall circumference is equipped with can open or close the cyclic annular arch of first blast pipe exhaust function with the cooperation of second spheroid.

As a preference: the outer side wall of the shell is circumferentially provided with a gripping part which is convenient for a user to grip the shell, and the outer side wall of the gripping part is provided with a frosting layer which increases the friction force between the frosting layer and the palm of the user.

As a preference: this has first screen cloth and second screen cloth in gas collecting vessel lateral wall circumference, first screen cloth is located the top of second screen cloth, first screen cloth lateral wall and second inner chamber inside wall fixed connection, first screen cloth center is equipped with the fifth through-hole that can pass for the gas collecting vessel, the inside wall of fifth through-hole and gas collecting vessel lateral wall fixed connection, second screen cloth lateral wall and second inner chamber inside wall fixed connection, second screen cloth center is equipped with the sixth through-hole that can pass for the gas collecting vessel, the inside wall of sixth through-hole and gas collecting vessel lateral wall fixed connection.

Preferably, the lower end of the annular chassis is distributed with 6 third air inlets in an area array, and a first one-way valve mechanism is arranged above each third air inlet.

Preferably, the lower end face of the gas collecting barrel is provided with 6 second gas inlet holes in an array distribution mode, and each second gas inlet hole is correspondingly provided with a water seal structure.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a cross-sectional view of an air sampler of the present invention.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Detailed Description

In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the various embodiments of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the utility model. That is, in some embodiments of the utility model, such implementation details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.

In addition, the descriptions related to the first, the second, etc. in the present invention are only used for description purposes, do not particularly refer to an order or sequence, and do not limit the present invention, but only distinguish components or operations described in the same technical terms, and are not understood to indicate or imply relative importance or implicitly indicate the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Example 1: referring to fig. 1 to 2, in this embodiment, a first inner chamber is disposed in the casing, a first air inlet capable of communicating with a top surface of the first inner chamber is disposed on an upper end surface of the casing, a gas collecting barrel is disposed in the casing, an outer side wall of the gas collecting barrel is fixedly connected with an inner side wall of the first inner chamber through a screen, an outer side wall of the screen is fixedly connected with the inner side wall of the first inner chamber through a welding manner, a central hole capable of allowing the gas collecting barrel to pass through is disposed in a center of the screen, an inner side wall of the central hole of the screen is fixedly connected with the outer side wall of the gas collecting barrel through a welding manner, and a mesh capable of filtering large-particle dust in gas is disposed on an end surface of the screen.

A second cavity is arranged in the gas collecting barrel, a sliding sheet is longitudinally connected in the second cavity in a sliding way, the outer side wall of the sliding sheet is circumferentially provided with a sealing ring, the outer side wall of the sealing ring is attached to the inner side wall of the second cavity, namely, the second cavity is divided into an upper half part and a lower half part by the sliding sheet, the inner side wall at the upper end of the second cavity is communicated with the outer side wall of the shell through a second exhaust pipe, the second exhaust pipe has the function that when the sliding sheet slides upwards in the second cavity, the gas in the upper half part of the second cavity is exhausted out of the shell through the second exhaust pipe, when the sliding sheet slides downwards in the second cavity, the gas outside the shell enters the upper half part of the second cavity through the second exhaust pipe, thereby ensuring that the sliding sheet can smoothly slide up and down in the second inner cavity, and the existence of the sealing ring can effectively prevent the gas at the upper half part of the second cavity from entering the space at the lower half part of the second cavity.

The air collector is mainly used for fixedly placing the air collector on a table board, and simultaneously, the phenomenon that the air collector inclines cannot occur when a user grasps the shell and slides the shell to the table board; and the base is arranged so that when the housing is displaced longitudinally, the slide plate in the second cavity can move in the opposite direction.

An annular base plate is arranged on the outer side wall of the first columnar protrusion in the circumferential direction, the outer side wall of the annular base plate and the inner side wall of the second cavity are integrally formed, and the inner side wall of a center hole of the annular base plate and the outer side wall of the first columnar protrusion are integrally formed. The annular bottom plate and the bottom surface of the second cavity only leave a first gap. Meanwhile, a third air inlet which is convenient for air to enter the lower half part space of the second cavity from the first gap longitudinally penetrates through the lower end face of the annular chassis, 6 third air inlets are formed in the annular chassis in total, and the 6 third air inlets are distributed on the annular chassis in an annular array mode by taking the first columnar bulge as a central shaft. And a first check valve structure is arranged above each third air inlet. The first check valve structure enables the gas to enter the second cavity only after passing through the third air inlet from the first gap, and the gas cannot flow back to the first gap from the second cavity. The lower end face of the gas collecting barrel is provided with a second gas inlet hole through which gas can enter the first gap, and the lower end face of the gas collecting barrel is fixedly connected with a water seal structure.

In this embodiment, the water seal structure includes a U-shaped pipe, a liquid is disposed in the U-shaped pipe, one end of the U-shaped pipe is communicated with the second air inlet, and one end of the U-shaped pipe, which is far away from the second air inlet, extends into the first inner cavity. However, in this embodiment, the horizontal height of the opening of the U-shaped pipe at the end far away from the second air inlet hole is equal to the horizontal height of the upper end surface of the second air inlet hole, that is, the highest liquid level in the U-shaped pipe does not exceed the upper end surface of the second air inlet hole. When the sliding sheet upwards slides in the second cavity, the space of the lower half part of the second cavity is increased, and then the space of the lower half part of the second cavity forms negative pressure, at the moment, gas in the first inner cavity can push liquid in the U-shaped pipeline to flow to the first gap along the U-shaped pipeline until the gas and the liquid simultaneously enter the first gap at the lower end of the second cavity from the second air inlet hole, and the gas enters the space of the lower half part of the second cavity through the first check valve.

In this embodiment, the second cavity inner side wall between the lower end surface of the sliding sheet and the upper end surface of the first cover body is communicated with the outer side wall of the shell through a first exhaust pipe, and a second one-way valve structure is arranged in the first exhaust pipe. The existence of the second check valve structure enables gas to flow through the first exhaust pipe from the second cavity and then be exhausted outside the shell, and the gas outside the shell cannot enter the second cavity through the first exhaust pipe. The pipe hole of the first exhaust pipe is internally and longitudinally provided with a first fixing piece, the side wall of the first fixing piece is provided with a fourth through hole through which gas can flow, and the outer side wall of the first fixing piece is bonded with the inner side wall of the pipe hole through an adhesive. The second spring is fixedly connected to the center of the first fixing plate, the second spring is far away from a second sphere fixedly connected to one end of the first fixing plate, an annular bulge is arranged on the inner side wall of one side, close to the second sphere, of the pipe hole in the circumferential direction, a seventh through hole is formed in the center of the annular bulge, the seventh through hole can allow gas to flow to the outer side wall of the second sphere, and a second gap is reserved between the outer side wall of the second sphere and the inner side wall of the pipe hole of the first exhaust pipe. When the second ball body is not pushed by air pressure, the outer side wall of the second ball body is tightly attached to the inner side wall of the seventh through hole, so that gas outside the shell is prevented from entering the second cavity. When the slide slides downwards to compress the lower half space of the second cavity, the air pressure in the lower half space of the second cavity can rise, so that the air in the first exhaust pipe is pushed to slide the second ball in the direction of the first fixing piece, the seventh through hole is not tightly attached to the outer side wall of the second ball, and the space between the outer side wall of the second ball and the seventh through hole is provided with a space for the air to flow into the second gap, so that the air can flow through the seventh through hole, the second gap, the fourth through hole is discharged out of the shell along the first exhaust pipe, and the air enters the external detection equipment.

In the process that the sliding sheet in the second inner cavity slides up and down, the second exhaust pipe is always in an open state. When the sliding sheet slides downwards, the gas outside the shell enters the upper half space of the second inner cavity from the second exhaust pipe. When the sliding sheet slides upwards, the gas in the upper half space of the second inner cavity is discharged to the outside of the shell from the second exhaust pipe.

The utility model relates to an air sampler, which comprises a shell 1, wherein a first inner cavity 2 is arranged in the shell 1, a first air inlet 3 communicated with the first inner cavity 2 is arranged at the outer side of the shell 1, a gas collecting barrel 4 is arranged in the first inner cavity 2, the outer side wall of the gas collecting barrel 4 is fixedly connected with the inner side wall of the first inner cavity 2 through a screen 5, a second inner cavity 6 capable of containing gas is arranged in the gas collecting barrel 4, a first driving mechanism capable of driving the gas to enter or discharge from the second inner cavity 6 is connected in the second inner cavity 6 in a sliding manner, a second air inlet 7 capable of allowing the gas to enter the second inner cavity 6 is arranged at the lower end face of the gas collecting barrel 4, a first one-way valve structure is arranged at the lower end of the second inner cavity 6 and positioned above the second air inlet 7, the inner side wall at the lower end of the second inner cavity 6 is communicated with the outer side wall of the shell 1 through a first exhaust pipe 8, a second one-way valve structure is arranged in the first exhaust pipe 8, the inner side wall at the upper end of the second inner cavity 6 is communicated with the outer side wall of the shell 1 through a second exhaust pipe 9, the lower end face of the gas collecting barrel 4 is provided with a water seal structure, and the water seal structure is communicated with the second gas inlet 7.

As a preference: the gas collecting device comprises a shell 1, wherein a first through hole 10 is formed in the lower end face of the shell 1, a first columnar bulge 11 is arranged at the center of the bottom face of a second inner cavity 6, a second through hole 12 communicated with the lower end face of a gas collecting barrel 4 is formed in the center of the upper end face of the first columnar bulge 11, a first driving mechanism comprises a sliding sheet 13 longitudinally connected into the second inner cavity 6 in a sliding mode, a first connecting rod 14 is fixedly connected to the lower end face of the sliding sheet 13, the lower end of the first connecting rod 14 penetrates through the second through hole 12 and the first through hole 10 and then is fixedly connected with a base 15 arranged below the shell 1, a sealing ring is arranged on the outer side wall of the sliding sheet 13 in the circumferential direction, the outer side wall of the sealing ring is attached to the inner side wall of the second inner cavity 6, a first one-way valve structure capable of only allowing gas to enter the second inner cavity 6 from a second gas inlet 7 is arranged between the outer side wall of the first columnar bulge 11 and the inner side wall of the second inner cavity 6, the first one-way valve structure is arranged above the second gas inlet 7, and the inner side wall of the second inner cavity 6 between the lower end face of the sliding sheet 13 and the first one-way valve structure is arranged through a first exhaust pipe 8 And a first gap 16 capable of containing liquid in the water seal structure is reserved between the first one-way valve structure and the bottom surface of the second inner cavity 6 and is communicated with the outer side wall of the shell 1.

As a preference: the water seal structure comprises a U-shaped pipeline 17 fixedly connected to the lower end face of the gas collecting barrel 4 and communicated with the two ends of the lower end face of the gas collecting barrel, one end of the U-shaped pipeline 17 is communicated with the second gas inlet 7, one end, far away from the second gas inlet 7, of the U-shaped pipeline 17 extends into the first inner cavity 2, and the horizontal height, far away from the opening of one end of the second gas inlet 7, of the U-shaped pipeline 17 is equal to the horizontal height of the second gas inlet 7.

As a preference: annular chassis 18 is arranged to first columnar boss 11 lateral wall circumference, annular chassis 18 lateral wall and 6 inside wall integrated into one piece of second inner chamber, the inside wall and the 11 lateral wall integrated into one piece of first columnar boss of annular chassis 18 centre bore, the terminal surface is equipped with a plurality of third air intakes 19 that can supply the gas to get into second inner chamber 6 from first clearance 16 under the annular chassis 18, annular chassis 18 up end is equipped with the first check valve structure that a plurality of steerable third air intakes 19 opened or closed, first check valve structure is including covering the first cover body 20 of locating annular chassis 18 up end, be equipped with first spheroid 21 between terminal surface and the third air intake 19 under the first cover body 20, first spheroid 21 lateral wall passes through first spring 22 and connects first cover body 20 down terminal surface, first cover body 20 lateral wall is equipped with the third through-hole 29 that can supply the air current to get into second inner chamber 6, first cover body 20 down terminal surface and annular chassis 18 up end integrated into one piece.

As a preference: the second check valve structure is including vertically locating the first stationary blade 23 of the 8 inside walls of first blast pipe, the 23 lateral walls of first stationary blade transversely are equipped with the fourth through-hole 24 that can supply the gas to flow, first stationary blade 23 is close to 6 one end of second inner chamber and has second spheroid 26 through second spring 25 elastic connection, 8 inside walls circumference of first blast pipe is equipped with can open or close the annular arch 27 of 8 exhaust functions of first blast pipe with the cooperation of second spheroid 26, annular arch center is equipped with the seventh through-hole that can supply the gas to flow to second spheroid lateral wall, leave the second clearance that can supply the gas to flow to first stationary blade between second spheroid lateral wall and the first blast pipe inside wall.

As a preference: the outer side wall of the shell 1 is circumferentially provided with a gripping part 28 which is convenient for a user to grip the shell 1, and the outer side wall of the gripping part 28 is provided with a frosting layer which increases the friction force between the frosting layer and the palm of the user.

As a preference: this has first screen cloth and second screen cloth 4 lateral wall circumference, first screen cloth is located the top of second screen cloth, first screen cloth lateral wall and 6 inside wall fixed connection of second inner chamber, first screen cloth center is equipped with the fifth through-hole that can supply gas collecting vessel 4 to pass, the inside wall of fifth through-hole and 4 lateral wall fixed connection of gas collecting vessel, second screen cloth lateral wall and 6 inside wall fixed connection of second inner chamber, second screen cloth center is equipped with the sixth through-hole that can supply gas collecting vessel to pass, the inside wall of sixth through-hole and 4 lateral wall fixed connection of gas collecting vessel.

Preferably, the lower end face of the annular base plate 18 is distributed with 6 third air inlets 19, and a first check valve mechanism is arranged above each third air inlet 19.

Preferably, the lower end surface of the gas collecting barrel 4 is provided with 6 second gas inlet holes 7 distributed in an array manner, and each second gas inlet hole 7 is correspondingly provided with a water seal structure.

Claims

1. The utility model provides an air sampler, includes casing (1), be equipped with first inner chamber (2) in casing (1), the casing (1) outside is equipped with first air inlet (3) of first inner chamber of intercommunication (2), its characterized in that: a gas collecting barrel (4) is arranged in the first inner cavity (2), the outer side wall of the gas collecting barrel (4) is fixedly connected with the inner side wall of the first inner cavity (2) through a screen (5), a second inner cavity (6) capable of containing gas is arranged in the gas collecting barrel (4), a first driving mechanism capable of driving the gas to enter or discharge from the second inner cavity (6) is connected in the second inner cavity (6) in a sliding manner, a second gas inlet hole (7) capable of allowing the gas to enter the second inner cavity (6) is formed in the lower end face of the gas collecting barrel (4), a first one-way valve structure is arranged above the second gas inlet hole (7) at the lower end of the second inner cavity (6), the inner side wall at the lower end of the second inner cavity (6) is communicated with the outer side wall of the shell (1) through a first exhaust pipe (8), a second one-way valve structure is arranged in the first exhaust pipe (8), the inner side wall at the upper end of the second inner cavity (6) is communicated with the outer side wall of the shell (1) through a second exhaust pipe (9), the lower end face of the gas collecting barrel (4) is provided with a water seal structure, and the water seal structure is communicated with the second gas inlet hole (7).

2. An air sampler as claimed in claim 1 wherein: the gas collecting device is characterized in that a first through hole (10) is formed in the lower end face of the shell (1), a first cylindrical protrusion (11) is arranged at the center of the bottom face of the second inner cavity (6), a second through hole (12) communicated with the lower end face of the gas collecting barrel (4) is formed in the center of the upper end face of the first cylindrical protrusion (11), the first driving mechanism comprises a sliding sheet (13) which is longitudinally connected into the second inner cavity (6) in a sliding mode, a first connecting rod (14) is fixedly connected to the lower end face of the sliding sheet (13), the lower end of the first connecting rod (14) penetrates through the second through hole (12) and the first through hole (10) and then is fixedly connected with a base (15) arranged below the shell (1), a sealing ring is arranged on the outer side wall of the sliding sheet (13) in the circumferential direction, the outer side wall of the sealing ring is attached to the inner side wall of the second inner cavity (6), and a second gas supply to enter the second inner cavity (6) from a second gas inlet hole (7) is arranged between the outer side wall of the first cylindrical protrusion (11) and the inner cavity (6) A check valve structure, first check valve structure is located the top of second inlet port (7), second inner chamber (6) inside wall between terminal surface and the first check valve structure under slide (13) is through first blast pipe (8) intercommunication casing (1) lateral wall, but leave first clearance (16) of liquid in holding water seal structure between first check valve structure and second inner chamber (6) bottom surface.

3. An air sampler as claimed in claim 1 wherein: the water seal structure includes U-shaped pipeline (17) of both ends intercommunication of terminal surface under gas collecting vessel (4), U-shaped pipeline (17) one end intercommunication second inlet port (7), U-shaped pipeline (17) are kept away from second inlet port (7) one end and are stretched into in first inner chamber (2), the level that second inlet port (7) one end opening part was kept away from in U-shaped pipeline (17) is leveled with the level of second inlet port (7).

4. An air sampler as claimed in claim 2, wherein: the outer side wall of the first columnar bulge (11) is circumferentially provided with an annular base plate (18), the outer side wall of the annular base plate (18) and the inner side wall of the second inner cavity (6) are integrally formed, the inner side wall of a center hole of the annular base plate (18) and the outer side wall of the first columnar bulge (11) are integrally formed, the lower end face of the annular base plate (18) is provided with a plurality of third air inlets (19) allowing air to enter the second inner cavity (6) from a first gap (16), the upper end face of the annular base plate (18) is provided with a plurality of first check valve structures capable of controlling the opening or closing of the third air inlets (19), each first check valve structure comprises a first cover body (20) covering the upper end face of the annular base plate (18), a first ball body (21) is arranged between the lower end face of the first cover body (20) and the third air inlets (19), the outer side wall of the first ball body (21) is connected with the lower end face of the first cover body (20) through a first spring (22), the outer side wall of the first cover body (20) is provided with a third through hole (29) through which air flow can enter the second inner cavity (6), and the lower end face of the first cover body (20) and the upper end face of the annular chassis (18) are integrally formed.

5. An air sampler as claimed in claim 1 wherein: second check valve structure is including vertically locating first stationary blade (23) of first blast pipe (8) inside wall, first stationary blade (23) lateral wall transversely is equipped with fourth through-hole (24) that can supply the gas flow, first stationary blade (23) are close to second inner chamber (6) one end and have second spheroid (26) through second spring (25) elastic connection, first blast pipe (8) inside wall circumference is equipped with can open or close annular arch (27) of first blast pipe (8) exhaust function with second spheroid (26) cooperation, annular arch center is equipped with the seventh through-hole that can supply the gas flow to second spheroid lateral wall, leave the second clearance that can supply the gas flow to first stationary blade between second spheroid lateral wall and the first blast pipe inside wall.

6. An air sampler as claimed in claim 1 wherein: casing (1) lateral wall circumference is equipped with the gripping portion (28) that the person of facilitating the use grasped this casing (1), gripping portion (28) lateral wall is equipped with the dull polish layer that increases and user's palm between frictional force.

7. An air sampler as claimed in claim 1 wherein: this has first screen cloth and second screen cloth gas collecting vessel (4) lateral wall circumference, and first screen cloth is located the top of second screen cloth, first screen cloth lateral wall and second inner chamber (6) inside wall fixed connection, first screen cloth center is equipped with the fifth through-hole that can pass for gas collecting vessel (4), fifth through-hole inside wall and gas collecting vessel (4) lateral wall fixed connection, second screen cloth lateral wall and second inner chamber (6) inside wall fixed connection, second screen cloth center is equipped with the sixth through-hole that can pass for the gas collecting vessel, sixth through-hole inside wall and gas collecting vessel (4) lateral wall fixed connection.

8. An air sampler as claimed in claim 4 wherein: the lower end of the annular chassis (18) is distributed with 6 third air inlets (19) in an area array, and a first one-way valve mechanism is arranged above each third air inlet (19).

9. An air sampler as claimed in claim 1 wherein: the lower end face of the gas collecting barrel (4) is provided with 6 second air inlet holes (7) in an array distribution mode, and each second air inlet hole (7) is correspondingly provided with a water seal structure.