CN218445022U

CN218445022U - Aerosol mass concentration calibrating device

Info

Publication number: CN218445022U
Application number: CN202222296628.3U
Authority: CN
Inventors: 黄振荣
Original assignee: Shanghai Yangyao Environmental Protection Instrument Co ltd
Current assignee: Shanghai Yangyao Environmental Protection Instrument Co ltd
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2023-02-03
Anticipated expiration: 2032-08-30

Abstract

The utility model discloses an aerosol mass concentration calibrating device belongs to aerosol calibrating device's technical field, it includes the mixing drum, the atomizing device of the one end intercommunication aerosol of mixing drum, the other end and the outlet device intercommunication of mixing drum, the outlet device is including each other as the play air cylinder and the bypass section of thick bamboo that communicate, go out air cylinder and mixing drum intercommunication, be equipped with the bypass chamber in the bypass section of thick bamboo, the bypass intracavity is provided with the bypass pipe, the both ends of bypass pipe extend to the outside of bypass section of thick bamboo export and entry respectively, be located the loss hole of seting up reposition of redundant personnel aerosol on the bypass pipe of bypass intracavity, set up the exit end with bypass chamber intercommunication on the bypass section of thick bamboo, the exit end of the aerosol of loss hole shunting is discharged through the exit end on the bypass section of thick bamboo. The utility model discloses a bypass section of thick bamboo balance calibrating device and by the flow between the calibration instrument to discharge unnecessary gas flow, maintain the aerosol mass concentration who takes place stably, improve the accuracy of aerosol calibration.

Description

Aerosol mass concentration calibrating device

Technical Field

The utility model relates to an aerosol calibrating device technical field, concretely relates to aerosol mass concentration calibrating device.

Background

Aerosol (aerosol) refers to a two-phase mixture with gas as the continuous phase and particulates as the dispersed phase. Aerosols of various particle sizes and different chemical compositions exist in the environment, and can affect human health, climate, visibility and quality of life to different degrees. In recent years, it has been discovered that aerosols play a significant role in complex environments, and that these aerosols directly affect the earth's thermal balance by absorption, scattering, and radiation, and also indirectly affect the composition of small species in the atmosphere, causing the generation or destruction of ozone and other chemicals.

The existing aerosol calibration device is communicated with a calibrated instrument in a positive pressure or negative pressure mode, the positive pressure mode is adopted, namely the aerosol flow of the calibration device is larger than that of the calibrated instrument, the negative pressure mode is adopted, namely the aerosol flow of the calibration device is smaller than that of the calibrated instrument, the aerosol flow between the calibration device and the calibrated instrument is unbalanced, and therefore the aerosol mass concentration is influenced stably, and the calibration accuracy is influenced.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned problem among the prior art, the utility model provides an aerosol mass concentration calibrating device can be regulated and control has solved current aerosol calibrating device and has been influenced the problem of calibration accuracy by the flow imbalance between the calibration instrument.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the aerosol mass concentration calibration device comprises a mixing cylinder, wherein one end of the mixing cylinder is communicated with an aerosol atomization device, the other end of the mixing cylinder is communicated with an outlet device, the outlet device comprises an air outlet cylinder and a bypass cylinder which are communicated with each other, and the air outlet cylinder is communicated with the mixing cylinder;

a bypass cavity is arranged in the bypass cylinder, a bypass pipe is arranged in the bypass cavity, and two ends of the bypass pipe respectively extend to the outside of an outlet and an inlet of the bypass cylinder; the bypass pipe positioned in the bypass cavity is provided with dissipation holes for shunting aerosol;

an outlet end communicated with the bypass cavity is formed in the bypass cylinder, and aerosol flowing out of the dissipation holes is discharged from the outlet end of the bypass cylinder.

The utility model discloses an outlet device emits calibrating device and by the unnecessary flow between the calibration instrument into the bypass intracavity, discharges at the exit end through the bypass chamber, guarantees calibrating device and by the flow balance between the calibration instrument, and the aerosol mass concentration who maintains the emergence is stable, improves the accuracy of aerosol calibration.

Further, a filtering device is arranged on the outlet end.

In this scheme, the exit of bypass section of thick bamboo sets up filter equipment, adopts above-mentioned scheme, and filter equipment avoids direct discharge gas, the polluted atmosphere environment with the aerosol filtering among the gas flow who discharges through the exit end.

Further, the inner diameter of the air outlet cylinder is gradually reduced.

In this scheme, the internal diameter of play gas cylinder is the convergent form, adopts above-mentioned scheme, and the internal diameter of play gas cylinder reduces, and when gas flow passes through this department, pressure diminishes, and the velocity of flow increases, produces the adsorption, can take out the complete quilt air current of aerosol in the mixing drum, prevents to remain in the cavity.

Furthermore, the taper angle of the air outlet cylinder is 20-40 degrees.

Further, the taper angle of the air outlet cylinder is 30 degrees.

In the scheme, the taper angle of the air outlet cylinder is 20-40 degrees, the optimal taper angle is 30 degrees, by adopting the scheme, the air flow can be smoother, aerosol can not remain in the cavity, the aerosol recovery rate is improved, and the accuracy of the calibration device is further improved.

Further, the atomization device comprises an atomizer, the bottom end of the mixing cylinder is provided with an atomizer fixing seat for fixing the atomizer,

furthermore, the bottom end of the side wall of the mixing cylinder is provided with an air inlet communicated with an air compressor.

In this scheme, the mixing drum passes through the air inlet and links to each other with the air compressor machine, adopts above-mentioned scheme, and in the air compressor machine introduced compressed air got into the mixing drum from the air inlet, the atomizing liquid drop that compressed air cladding atomizer produced fused in the mixing chamber to a play gas cylinder is sent to.

Further, the atomizer fixing base includes fixed female seat and fixation nut, and fixed female seat includes the fixed disk and the fixed sub-seat of being connected with the fixed disk, and the fixed disk passes through flange and mixing drum fixed connection.

In this scheme, through the screw-thread fit of solid stator seat and fixation nut, be fixed in the fixed slot with the atomizer in, and then be fixed in the flange with the atomizer.

Furthermore, set up the fixed slot that communicates fixed disk and stator seat on fixed disk and the solid stator seat, in the atomizer embedding fixed slot, the stator seat overcoat is equipped with fixation nut, and the screw-thread fit of solid stator seat and fixation nut is fixed in the fixed slot with the atomizer, and the export of atomizer passes the flange and stays in the mixing drum.

Furthermore, a plurality of O-shaped ring grooves are formed in the fixing grooves on the stator seat, and O-shaped rings are arranged in the ring grooves.

In the scheme, the stator seat is fastened through the fixing nut clamp, so that the fixed stator seat is clamped on the atomizer, the O-shaped ring is pressurized by the fixed stator seat, and the atomizer is clamped

The utility model discloses an aerosol mass concentration calibrating device, its beneficial effect is:

1. the utility model discloses a bypass section of thick bamboo balance calibrating device and by the flow between the calibration instrument to discharge unnecessary gas flow, maintain the aerosol mass concentration who takes place stably, improve the accuracy of aerosol calibration.

2. The utility model discloses set up filter equipment in the exit of a bypass section of thick bamboo, filter the aerosol in with unnecessary gas through filter equipment, prevent the unnecessary gas pollution atmosphere of emission.

3. The utility model discloses set up the air outlet cylinder into the toper, can make the air current more smooth and easy, the aerosol can not remain in the cavity, promotes the aerosol rate of recovery, and then improves calibrating device's the degree of accuracy.

Drawings

Fig. 1 is a schematic structural diagram of the aerosol mass concentration calibration device of the present invention.

Fig. 2 is a schematic structural diagram of the inside of the bypass cartridge according to the present invention.

Fig. 3 is a diagram of an aerosol trajectory simulation of the present invention.

Fig. 4 is a graph showing the comparison of mass concentration and the test result of the aerosol of the present invention.

Wherein, 1, mixing cylinder; 2. an air outlet cylinder; 3. a bypass cartridge; 31. a bypass lumen; 32. a bypass pipe; 33. an escape aperture; 4. a filtration device; 5. an atomizer holder; 51. fixing the female seat; 511. fixing the disc; 512. fixing the stator base; 513. an annular groove; 514. an O-ring; 52. a nut; 6. a flange; 7. an atomizer; 8. an air inlet.

Detailed Description

The present invention is not limited to the specific embodiments, and it should be understood that various changes can be made within the spirit and scope of the present invention as defined and determined by the appended claims.

Example 1

Fig. 1 and fig. 2 are schematic structural diagrams of an aerosol mass concentration calibration device, which are used for balancing flow between the calibration device and an instrument to be calibrated, and discharging redundant gas flow, so as to maintain stable mass concentration of generated aerosol and improve accuracy of aerosol calibration; the components of the aerosol mass concentration calibration device will now be described in greater detail.

The aerosol mass concentration calibration device comprises a mixing cylinder 1, one end of the mixing cylinder 1 is communicated with an outlet device, and the other end of the mixing cylinder is communicated with an aerosol atomization device.

Specifically, the outlet device comprises an air outlet cylinder 2 and a bypass cylinder 3 which are communicated, the air outlet cylinder 2 is communicated with the mixing cylinder 1 through a flange, a bypass cavity 31 is arranged in the bypass cylinder 3, a bypass pipe 32 is arranged in the bypass cavity 31, two ends of the bypass pipe 32 respectively extend to the outside of an outlet and an inlet of the bypass cylinder 3, an escape hole 33 is formed in the bypass pipe 32 in the bypass cavity 31 and used for distributing aerosol, an outlet end communicated with the bypass cavity 31 is formed in the bypass cylinder 3, and the aerosol distributed from the escape hole 33 is discharged through the outlet end on the bypass cylinder 3.

The calibration device adopts positive pressure to transmit aerosol, the gas flow of the calibration device is larger than that of the calibrated instrument, and redundant gas enters the bypass cavity 31 from the dissipation hole 33 and flows through the outlet end on the bypass cylinder 3 to be discharged in a shunting manner, so that the flow between the calibration device and the calibrated instrument is balanced, the mass concentration of generated aerosol is maintained to be stable, and the accuracy of aerosol calibration is improved; besides, the interference (such as strong wind, heavy rain and other factors) of the external environment when the excessive gas is directly discharged is avoided by the buffering of the bypass cavity 31, and the stability of the aerosol quality concentration is influenced.

Example 2

In order to avoid the pollution of the aerosol emission to the atmosphere, the present embodiment provides a further solution for the bypass cartridge 3, a filter device 4 is disposed on the outlet end of the bypass cartridge 3, and the filter device 4 is communicated with the bypass cavity 31.

Specifically, filter device 4 is current PALL HEPA filter 12144, and the surplus gas that flows out in bypass chamber 31 gets into filter device 14 through the exit end in, and filter device 14 filters the aerosol in the surplus gas, and then will filter the gas that filters the aerosol and directly discharge through the export of filter device 4, prevent that the aerosol in the surplus gas of emission from polluting the atmospheric environment.

Example 3

In order to avoid aerosol remaining in the cavity and influencing the mass concentration of aerosol, this embodiment provides a further scheme of air outlet cylinder 2, and the internal diameter of air outlet cylinder 2 is the convergent.

Specifically, the air outlet cylinder 2 is a conical cylinder, the cone angle of the air outlet cylinder 2 is preferably 20-40 degrees, the cone angle of the air outlet cylinder 2 is preferably 30 degrees, the inner diameter of the conical cylinder is gradually reduced, when the air flow passes through the air outlet cylinder, the flow speed is increased, the aerosol in the mixing cylinder 1 can be completely taken out by the air flow, the aerosol is prevented from remaining in the cavity, the aerosol recovery rate is improved, and the accuracy of the calibration device is further improved.

The utility model discloses use CFD software simulation 3D solid model, solution produces the aerosol via solution entry quantitative transport, dilution gas gets into the hybrid chamber with 25L/min's flow by the air inlet, the air current is carried the aerosol towards the direction of export, reach like the aerosol orbit mimic diagram of fig. 3, can see the cone angle because of the reducing pipe and reduce, lead to the aerosol to get into the in-process of reducing pipe by the hybrid chamber, can be complete take out by the air current, can not remain in the cavity, and in subsequent test, use Met One BAM-1020 online particulate matter monitor to test, reach like the aerosol mass concentration ratio test result of fig. 4.

Example 4

In order to atomize the solution, produce the stable aerosol of mass concentration, this embodiment has given an atomizing device's further scheme, and atomizing device includes atomizer 7, and the bottom of mixing drum 1 is provided with atomizer fixing base 5 of fixed atomizer 7, the bottom of mixing drum 1 lateral wall seted up with the air inlet 8 with the air compressor machine intercommunication.

The air compressor machine passes through air inlet 8 transmission dry air and gets into mixing drum 1 in, and atomizer 7 sends into mixing drum 1 after atomizing solution, and dry air cladding atomizing liquid drop mixes in mixing drum 1, and the air compressor machine continuously carries dry air, sends atomizing liquid drop to play gas cylinder 2.

Specifically, the atomizer fixing base 5 comprises a fixing female base 51 and a fixing nut 52, the fixing female base 51 comprises a fixing disc 511 and a fixing sub-base 512 connected with the fixing disc 511, and the fixing disc 511 is fixedly connected with the mixing cylinder 1 through a flange 6.

The fixed disk 511 and the fixed stator seat 512 are both provided with communicated fixed grooves, the atomizer 7 is embedded into the fixed grooves, the fixed stator seat 512 is sleeved with a fixed nut 52, the fixed stator seat 512 is in threaded fit with the fixed nut 52, the atomizer 7 is fixed in the fixed grooves, an outlet of the atomizer 7 penetrates through the flange 6 and is reserved in the mixing drum 1, the fixed stator seat 512 is provided with a plurality of O-shaped annular grooves 513, and the annular grooves 513 are internally provided with O-shaped rings 514.

The fixed stator seat 512 is provided with external threads, the fixed nut 52 is provided with internal threads, the fixed nut 52 can extrude the fixed stator seat 512 through the matching of the threads, the fixed stator seat 512 is clamped on the atomizer 7 through the O-shaped ring 514, the fixed nut 52 is continuously screwed, the fixed stator seat 512 is extruded, and the atomizer 7 is further clamped.

This scheme can regulate and control aerosol mass concentration calibrating device's theory of operation does:

the utility model discloses in practical application, as shown in fig. 1 and fig. 2, the one end and the outlet device intercommunication of mixing drum 1, the atomizing device of the other end intercommunication aerosol.

The atomizing device comprises an atomizer 7, the atomizer 7 is communicated with the mixing cylinder 1 through an atomizer fixing seat 5, an outlet of the atomizer 7 is reserved in the mixing cylinder 1, an air inlet 8 of the mixing cylinder 1 is communicated with an air compressor, and the air compressor transmits atomized liquid drops generated by coating the atomizer 7 with dry air, the atomized liquid drops are fused in the mixing cavity 1 and are sent to the air outlet cylinder 2.

Go out a section of thick bamboo 2 and be a toper section of thick bamboo, when gas flow passes through this department, the velocity of flow increase can be with the complete being taken away by the air current of the aerosol of mixing drum 1, prevents to remain in the cavity, promotes the aerosol rate of recovery, and then improves calibrating device's the degree of accuracy.

This calibrating device adopts malleation conveying aerosol, calibrating device's gas flow is greater than the gas flow by the calibrating instrument, go out gas cylinder 2 and bypass section of thick bamboo 3 and by the calibrating instrument intercommunication, and unnecessary gas gets into bypass chamber 31 from the dissipation hole 33 in the bypass section of thick bamboo 3 in, exit end on the bypass section of thick bamboo 3, discharge unnecessary gas reposition of redundant personnel, balanced calibrating device and by the flow between the calibrating instrument, except this, through the buffering in bypass chamber 31, receive external environment's interference (like strong wind, factor such as heavy rain) when avoiding directly discharging unnecessary gas, influence aerosol mass concentration's stability.

While the present invention has been described in detail with reference to the embodiments, the scope of the present invention should not be limited to the embodiments. Various modifications and changes may be made by those skilled in the art without inventive work within the scope of the appended claims.

Claims

1. An aerosol mass concentration calibrating device, characterized in that: comprises a mixing cylinder (1); one end of the mixing cylinder (1) is communicated with an aerosol atomization device, and the other end of the mixing cylinder (1) is communicated with an outlet device;

the outlet device comprises an air outlet cylinder (2) and a bypass cylinder (3) which are communicated with each other; the air outlet cylinder (2) is communicated with the mixing cylinder (1);

a bypass cavity (31) is arranged in the bypass cylinder (3); a bypass pipe (32) is arranged in the bypass cavity (31), and two ends of the bypass pipe (32) respectively extend to the outsides of an outlet and an inlet of the bypass cylinder (3); a dissipation hole (33) for shunting aerosol is formed in the bypass pipe (32) positioned in the bypass cavity (31);

an outlet end communicated with the bypass cavity (31) is formed in the bypass cylinder (3), and the aerosol which is divided by the dissipation holes (33) is discharged through the outlet end in the bypass cylinder (3).

2. An aerosol mass concentration calibration device according to claim 1, wherein: and the outlet end is provided with a filtering device (4).

3. An aerosol mass concentration calibration device according to claim 1, wherein: the inner diameter of the air outlet cylinder (2) is gradually reduced.

4. An aerosol mass concentration calibration device according to claim 3, wherein: the taper angle of the air outlet cylinder (2) is 20-40 degrees.

5. An aerosol mass concentration calibration device according to claim 4, wherein: the taper angle of the air outlet cylinder (2) is 30 degrees.

6. An aerosol mass concentration calibration device according to claim 1, wherein: the atomizing device comprises an atomizer (7); the bottom of mixing drum (1) is provided with atomizer fixing base (5) of fixed atomizer (7).

7. An aerosol mass concentration calibration device according to claim 6, wherein: and an air inlet (8) communicated with an air compressor is formed in the bottom end of the side wall of the mixing cylinder (1).

8. An aerosol mass concentration calibration device according to claim 6, wherein: the atomizer fixing seat (5) comprises a fixing female seat (51) and a fixing nut (52); the fixed female seat (51) comprises a fixed disc (511) and a fixed sub-seat (512) connected with the fixed disc (511); the fixed disc (511) is fixedly connected with the mixing drum (1) through a flange (6).

9. An aerosol mass concentration calibration device according to claim 8, wherein: fixing grooves for communicating the fixing disc (511) with the stator seat (512) are formed in the fixing disc (511) and the stator seat (512), the atomizer (7) is embedded into the fixing grooves, a fixing nut (52) is sleeved outside the fixing stator seat (512), and the fixing stator seat (512) is matched with the fixing nut (52) in a threaded manner to fix the atomizer (7) in the fixing grooves; the outlet of the atomizer (7) passes through the flange (6) and is reserved in the mixing cylinder (1).

10. An aerosol mass concentration calibration device according to claim 9, wherein: a plurality of O-shaped ring grooves (113) are formed in the fixing grooves on the fixed stator seat (512), and O-shaped rings are arranged in the ring grooves (113).