CN114047104A - Auxiliary device for PM2.5 detector calibration - Google Patents

Abstract

The invention relates to the field of environmental protection, in particular to an auxiliary device for calibrating a PM2.5 detector, which comprises a sealing cover, a cigarette lighter, a smoke absorbing pipe and a base, wherein the sealing cover is arranged on the base; the sealing cover consists of a cover cap and a cover body fixed on the cover cap; the sealing cover is arranged on the surface of the base to form a closed space, and the cigarette lighter and the smoking pipe extend into the closed space from the cover; an air inlet is arranged at the central position of the base in the closed space; the cigarette lighter is vertically fixed at the center of the cover and can move up and down along the vertical direction; one end of the smoking pipe is aligned with the lower end of the cigarette lighter, and the other end of the smoking pipe penetrates through the cover cap. Compared with the prior art, the smoke generating device disclosed by the invention realizes the rapid and efficient generation of smoke, and can be suitable for various different combustion products to generate smoke with different particle sizes.

Description

Auxiliary device for PM2.5 detector calibration

Technical Field

The invention relates to the field of environmental protection, in particular to an auxiliary device for calibrating a PM2.5 detector.

Background

Air is one of necessities for people to live, and the quality of air greatly influences the health and the life quality of people. With the industrialization of human society and the continuous development of productivity, the environment is seriously damaged, and the air quality is continuously reduced. The content of solid particles in the air is one of the important standards for judging the air quality, and particularly, indexes such as PM10 and PM2.5 in the air become one of the important factors for judging the air quality, so that solid particle detectors are widely concerned.

At present, no matter the air quality detector that is used industrially or the air purifier that is used domestically, such equipment that is relevant with air quality all can have solid particle thing detection device, and every solid particle thing detection device all need test and calibrate before dispatching from the factory in order to obtain qualified product, when detecting it, just need produce the solid particle of different concentration, different particle size through solid particle thing generator in order to carry out the detection of multinomial to solid particle thing detection device.

Disclosure of Invention

The invention aims to solve at least one of the problems, and provides an auxiliary device for PM2.5 detector calibration, which realizes quick and efficient generation of smoke and can adapt to various different combustion products so as to generate smoke with different particle sizes.

The purpose of the invention is realized by the following technical scheme:

an auxiliary device for PM2.5 detector calibration comprises a sealing cover, a cigarette lighter, a smoke absorbing pipe and a base;

the sealing cover consists of a cover cap and a cover body fixed on the cover cap;

the sealing cover is arranged on the surface of the base to form a closed space, and the cigarette lighter and the smoking pipe extend into the closed space from the cover; an air inlet is arranged at the center of the base in the closed space;

the cigarette lighter is vertically fixed at the center of the cover and can move up and down along the vertical direction;

one end of the smoke absorbing pipe is aligned with the lower end of the cigarette lighter, and the other end of the smoke absorbing pipe penetrates through the cover cap.

Preferably, the base on still be equipped with slewing mechanism, slewing mechanism include pivot and with pivot matched with support frame, the pivot be fixed in on the base, support frame and sealed cowling cover fixed connection, the support frame can revolve the pivot. The support frame rotates around the rotating shaft and can drive the sealing cover to rotate, and the sealing cover is convenient to open and close.

Preferably, the maximum rotation angle of the support frame rotating around the rotating shaft is 45-60 degrees. The operator can conveniently place the combustion objects with various specifications into the closed space under the maximum rotation angle; the force that the pivot received when rotating to this maximum turned angle can be increased to the continuation maximum turned angle again, puts forward further requirement to the intensity, the rigidity of pivot and the selection of material, can improve the cost of pivot portion by a wide margin to too big turned angle still can increase the use volume of this device when opening, can produce convenient to use problem and operation safety problem simultaneously. The limitation of the maximum rotation angle can be realized by arranging fixture blocks at corresponding positions on the support frame and the rotating shaft respectively, or by arranging matched grooves and lugs at corresponding positions on the support frame and the rotating shaft respectively.

Preferably, the bottom of the cover body is provided with a sealing gasket. The sealing gasket is made of high-elasticity material such as rubber. The existence of the sealing gasket can lead the sealing cover to have buffering when closing, and can assist to improve the sealing performance of the closed space so as to reduce the occurrence of air leakage.

Preferably, the sealing gasket is detachably arranged at the bottom of the cover body, and the sealing gasket is convenient to replace after sealing failure.

Preferably, the base is further provided with a groove with the diameter equal to that of the sealing cover, and the sealing cover is in the groove when covering. The sealing cover is arranged in the groove when being arranged below the sealing cover, the positioning capacity of the sealing cover can be improved, the sealing gasket is also arranged in the groove at the moment, the whole groove is filled with the sealing gasket after being extruded and deformed, and the sealing performance of the closed space can be effectively improved. And further, the processing precision of the groove is controlled, so that the sealing property of the closed space can be further improved, and the abrasion to the sealing gasket is reduced.

Preferably, a boss is further arranged on the base right below the cigarette lighter, and an object placing hole is formed in the boss. The boss sets up and can be in order to make things convenient for the cigar lighter to aim at the comburent under the cigar lighter, can stand upright the comburent of placing in putting the thing hole, for example cigarette, fragrant and candle etc. set up different comburents and can burn the solid particle that obtains different particle sizes and in order to simulate more true, the complicated condition.

Preferably, the object placing hole is further provided with a poking sheet, and when the diameter of the object placing hole is larger than that of the burning objects and the burning objects cannot stand independently, the burning objects can be blocked by adjusting the position of the poking sheet, so that the burning objects stand upright to facilitate the ignition of the burning objects by the cigarette lighter.

Preferably, the air inlet hole is arranged on the boss.

Preferably, the number of the air inlet holes is 1-4, and the diameter of the air inlet holes is 1-3 mm.

The air inlet is arranged around the combustion object, the airflow flowing into the closed space from the air inlet can be directly blown out upwards along the combustion object, the sufficient combustion of the combustion object is facilitated, the smoke inlet end of the smoking pipe is aligned to the lower end of the cigarette lighter, namely the upper end of the combustion object, and therefore smoke generated after the combustion of the combustion object can directly enter the smoking pipe along with the airflow, and the smoke can be effectively collected.

Preferably, the base is internally provided with an air pump, one end of the air pump is communicated with the atmosphere or the oxygen supply device, the other end of the air pump is connected with the air inlet, when the air pump burns in the closed space, the air pump can send air or oxygen into the closed space through the air inlet so as to provide enough combustion-supporting substances, and the generated air flow can drive the generated smoke to rapidly enter the smoking pipe and be discharged out of the closed space.

Preferably, the air pump is further provided with a gas flow meter between the air inlets, and the flow rate of the gas flowing into the closed space can be adjusted according to the combustion condition, so that the gas flow flowing into the closed space from the air inlets can be in a state suitable for combustion of a combustion object, and most of smoke can enter the smoke absorbing pipe along with the gas flow and is discharged out of the closed space without remaining in the closed space; meanwhile, smoke with different flow rates and flows can be provided for experiments.

Preferably, an air pump is arranged at the smoke exhaust end of the smoke exhaust pipe, and the air pump can pump out air in the closed space, accelerate the flow of smoke along with the airflow and reduce the residue of the smoke in the closed space. After the experiment is finished, the air pump can be used for replacing air in the closed space, so that the pollution of residual smoke in the closed space to a laboratory is prevented.

Preferably, air pumps can be arranged inside the base and at the smoke exhaust end of the smoke suction pipe, and the two air pumps are matched with each other, so that air can flow rapidly, and the time required by combustion and the experiment time can be reduced.

Preferably, the maximum distance between the cigarette lighter and the base is 2/3 of the height of the cover body, and the minimum distance is 1/5 of the height of the cover body. The lighter moves telescopically within this height range, accommodating most of the combustion products. The cigarette lighter is an electric cigarette lighter, the structure of the cigarette lighter is similar to that of an umbrella handle of a folding umbrella, the cigarette lighter is arranged in a multi-section nesting mode, and the cigarette lighter can be arranged according to sections when being stretched. The lighter can be divided into 2-4 sections according to the moving distance, and is driven by a motor arranged in the cover.

Preferably, 1-3 smoking pipes are arranged. The number of fume tubes can be selected based on the amount of smoke produced, and the fume end of the fume tube is connected to a laboratory or laboratory box calibrated with a PM2.5 detector.

Preferably, a detachable bottom support is further arranged on the base in the closed space, and the arrangement of the bottom support can facilitate the treatment of the residual ash and slag of the combustion substances after the test is finished.

Preferably, the cover body make by transparent material, make things convenient for the operator to observe the inside condition, both can conveniently place the height of thing after the burning point cigarette ware of adjusting, the inside condition of sealed cowling when being convenient for observe the experiment again, can in time discover the problem and stop the experiment or manually adjust the air current velocity of flow and flow change test condition.

Preferably, the cover body is made of glass or organic glass, has enough strength and tightness under the condition of transparency, and does not react with smoke generated inside.

Preferably, the whole sealing cover is cylindrical, and the groove of the base is also annular, so that the sealing cover is convenient to match and clean.

Preferably, an infrared sensor is further arranged below the cover, an indicating device is further arranged on the base, and the infrared sensor can detect whether the combustion object is still burning through temperature and indicate the internal state of an operator through the indicating device.

Preferably, the indicating means may be an indicator light or a display screen.

Preferably, the display screen may be a touch screen, and instructions or parameters may be input into the display screen or adjusted.

The working principle of the invention is as follows:

the burning object is placed in a closed space formed by the sealing cover and the base, the burning object is ignited through the cigarette lighter, the burning object burns to generate smoke, the air inlet hole supplies oxygen serving as a combustion-supporting object to the inside of the closed space, the burning object is continuously burnt, the smoke generated by burning is brought into the smoking pipe, and the smoke is sucked out of the auxiliary device through the smoking pipe.

Compared with the prior art, the invention has the following beneficial effects:

1. through the cigar lighter that sets up the movable up-and-down, can make things convenient for the ignition of the burning thing of multiple height, and need not to inject the burning thing of a certain height to adjustable height also is convenient for the operator to install the burning thing. The smoking pipe is close to the lower end of the cigarette lighter, namely close to the upper end of the comburent, can timely receive smoke after the comburent burns to generate smoke, and sends the smoke-containing air into the specified device.

2. The cooperation design of the recess of sealed pad and base and the recess of cover body bottom relies on the weight of sealed cowling self to seal the pad card and go into the recess and take place to warp, can make the holistic leakproofness of device obtain promoting to can fix its card and go into the position when closed sealed cowling, can not produce the skew and reduce the leakproofness. In addition, the sealing gasket has certain elasticity, can play a role in buffering, and effectively prevents the sealing cover from directly colliding or rubbing with the base to damage equipment or reduce the sealing property.

3. The material placing hole of the boss arranged in the closed space can be used for placing combustion materials, the poking sheet is also arranged in the material placing hole, and the size of the opening of the boss can be changed by poking the poking sheet for the combustion materials with small diameters so as to clamp the combustion materials, so that the combustion materials are upright and the ignition of the cigarette lighter is facilitated; the position that the boss set up is just to the below of cigar lighter, can make the comburent place the back on the boss, it can just be to the cigar lighter to light.

4. An air inlet is arranged on the base of the closed space, and an air pump is arranged in the base, so that the flow of air flow in the sealing cover can be accelerated conveniently; or the smoking pipe is connected with the air pump, so that the air with the smoke in the smoking pipe can be quickly pumped out, and the smoke generation speed is increased; in addition, the smoke in the closed space can be blown out after the experiment is finished, so that the laboratory environment is prevented from being polluted. The airflow flowing out of the air inlet blows over the comburent from bottom to top, which is beneficial to the full combustion of the comburent and can bring the smoke generated by the combustion upwards into the smoking pipe.

5. The sealing cover is opened and closed in a mode of rotating around the rotating shaft, and the possibility of air leakage can be effectively reduced by matching with the use of the sealing gasket. And the limitation of the maximum rotation angle is set by arranging the limiting block, so that the occupied space of the device in use is reduced, and the safety of the device is improved.

6. The cover body is made of transparent materials, so that the internal condition can be clearly observed, the smoke generation process can be further observed and controlled through the gas flowmeter, the infrared sensor and the indicating device, and the occurrence of accidents is prevented.

Drawings

FIG. 1 is a schematic structural diagram of an auxiliary device for precision calibration of a PM2.5 detector according to the present invention with a cover removed;

FIG. 2 is a schematic view of an angle of the auxiliary device for precision calibration of a PM2.5 detector according to the present invention;

FIG. 3 is a schematic diagram of another angle of the auxiliary device for precision calibration of a PM2.5 detector according to the present invention;

in the figure: 1-a cover; 2-the cover body; 3-cigarette lighter; 4-a smoke absorbing pipe; 5-a base; 6-a rotating shaft; 7-a support frame; 8-a sealing gasket; 9-boss.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments.

Example 1

An auxiliary device for PM2.5 detector calibration, as shown in FIGS. 1-3, comprises a sealing cover, a cigarette lighter 3, a smoking pipe 4 and a base 5; the sealing cover consists of a cover cap 1 and a cover body 2 fixed on the cover cap 1; the sealing cover is arranged on the surface of the base 5 to form a closed space, and the cigarette lighter 3 and the smoking pipe 4 extend into the closed space from the cover 1; an air inlet is arranged at the central position of the base 5 in the closed space; the cigarette lighter 3 is vertically fixed at the center of the cover cap 1 and can move up and down along the vertical direction; one end of the smoking pipe 4 is aligned with the lower end of the cigarette lighter 3, and the other end thereof passes through the cover cap 1.

More specifically, in the present embodiment:

the rotating mechanism is arranged on the base 5 and comprises a rotating shaft 6 and a supporting frame 7 matched with the rotating shaft 6, the rotating shaft 6 is fixed on the base 5, and the supporting frame 7 is fixedly connected with the sealing cover 1 and can rotate around the rotating shaft 6. The support frame 7 rotates around the rotating shaft 6 to drive the sealing cover 1 to rotate together, so that the sealing cover can be opened and closed conveniently. The maximum rotation angle of the support frame 7 rotating around the rotating shaft 6 can be set to 45-60 degrees, in this embodiment, 60 degrees is set, so that an operator can conveniently place various specifications of combustion objects into the support frame to the maximum extent, and the problem caused by the overlarge rotation angle of the sealing cover can be prevented. In this embodiment, a fixture block is disposed on each of the support frame 7 and the rotating shaft 6 to limit the maximum rotation angle. When rotating to the biggest turned angle, the sealed cowling can be blocked and can't continue to rotate, and the operator can make things convenient for the operator to use without holding up the sealed cowling like this.

The base 5 is provided with a groove, and the diameter of the groove is equivalent to that of the sealing cover; set up sealed pad 8 in cover body 2 bottom, when sealed cover was in the lid and closed the state, sealed pad 8 can just be in the recess of base 5 to sealed cover can compress tightly sealed pad 8 through self weight, makes sealed pad 8 take place the elastic deformation in the recess, and then is full of whole recess space, makes between sealed cover and the base 5 totally sealed. When the sealing gasket 8 needs to be replaced, the sealing cover is rotated to the maximum rotation angle, and then the sealing gasket 8 is detached from the cover body 2 for replacement, so that the sealing gasket is convenient and fast. In this embodiment, sealed 8 of filling up adopts rubber seal pad 8, and rubber products has certain elasticity, not only can take place the deformation when pushing down, makes airtight space sealed completely, prevents gas leakage, can also slow down the impact to the sealed cowling when closed sealed cowling, reduces the wearing and tearing of device.

In the airtight space that sealed cowling and base 5 formed, the central point of base 5 under cigar lighter 3 put and has set up a boss 9, and this boss 9 has been seted up and has been put the thing hole, can be used for assisting vertical fixed combustion thing, makes things convenient for cigar lighter 3 to aim at, puts the downthehole plectrum that still is equipped with of thing, can adjust the opening size in order to adapt to the combustion thing of different thicknesses through stirring the plectrum. The outside of boss 9 has still set up the detachable collet to the position that is close to the recess in this embodiment, and the side of this collet sticks up, leaves the trompil that holds boss 9 and pass through in the middle of the bottom, through the setting that can dismantle the collet can be convenient take out the residue after the burning is accomplished to the burning to only need to clean the collet can, only need clean the whole after having carried out a large amount of experiments.

The cigarette lighter 3 extends downwards from the center of the cover cap 1, the distance from the cigarette lighter 3 to the base 5 can be adjusted in 2/3-1/5 of the height of the cover body 2, the cigarette lighter 3 is usually arranged at a position which is half of the height of the cover body 2, in the embodiment, the structure of the cigarette lighter 3 is similar to that of an umbrella handle of a folding umbrella and is divided into three sections, and the extension and the retraction of the cigarette lighter are driven by a motor arranged in the cover cap 1. Surrounding the lighter 3 is a smoking tube 4, typically 1-3, which is positioned with the lower end of the smoking tube 4 positioned adjacent the lower end of the lighter 3 and aligned with the lower end of the lighter 3 in such a way that smoke generated by the combustion of the combustion products enters the smoking tube 4 rapidly and in close proximity to the air flow. In this embodiment, 1 smoking tube 4 is provided, which can move up and down following the lighter 3, thus keeping its tip at the lower end of the lighter 3 at all times. The other end of the smoke absorbing pipe 4 is connected to the solid particle testing chamber.

In order to ensure that the inside of the closed space does not generate an oxygen deficiency condition to influence the combustion and smoke generation, the boss 9 is also provided with air inlets which can be generally set to be 1-4 air inlets with the diameter of 1-3 mm. In this embodiment, 3 air inlets with a diameter of 2mm are arranged on the boss 9, and the centers of the bosses 9 form a triangular arrangement. The air inlet is used for introducing air into the closed space through the air pump arranged in the base 5, the air flows through the closed space from bottom to top along the combustion objects, effective combustion supporting can be realized, smoke generated by combustion is quickly blown into the smoking pipe 4, the other end of the smoking pipe 4 is also connected with the air pump, smoke-containing air in the closed space can be quickly extracted, air exchange in the closed space can be quickly realized through the matching of the air inlet and the smoking pipe, the quick combustion of the combustion objects can be promoted during combustion, and the generated smoke can be quickly conveyed out of the closed space; meanwhile, the gas in the closed space can be quickly replaced after the experiment is finished, and the influence on the environment caused by the fact that the smoke in the closed space is scattered in a laboratory after the sealing cover is opened is prevented. In order to prevent the excessive burning or the extinguishment caused by the excessively violent input airflow, a gas flowmeter is further arranged inside the base 5 and is arranged between the air pump and the air inlet pipe, an operator can adjust the gas flow to change the flow and the flow rate of the air, an infrared sensor arranged at the lower part of the cover 1 can be matched to detect flame and control the gas flowmeter, and meanwhile, different smoke-containing air flow rates can be simulated by adjusting the flow within a reasonable range for testing the response speed of the PM2.5 detector.

In the embodiment, the cover 1 is made of aluminum alloy, has light weight and enough strength, and is convenient to use; the cover body 2 is made of transparent organic glass, so that the internal condition can be visually seen, and the cover body has enough strength. There is the pilot lamp on base 5 for whether the suggestion operator experiment is ended, when detecting that inside temperature has been close to the room temperature, the pilot lamp can be lighted, reminds the operator to finish fuming.

The working principle of the invention is as follows:

the comburent is placed in a closed space formed by the sealing cover and the base 5, the comburent is ignited through the cigarette lighter 3, the comburent is combusted to generate smoke, the air inlet hole supplies oxygen serving as a combustion supporter to the closed space, the comburent is continuously combusted, the smoke generated by combustion is brought into the smoking pipe 4, and the smoke is sucked out of the auxiliary device through the smoking pipe 4.

The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.

Claims (10)

1. Auxiliary device for PM2.5 detector calibration, characterized by comprising a sealing cover, a cigarette lighter (3), a smoking pipe (4) and a base (5);

the sealing cover consists of a cover cap (1) and a cover body (2) fixed on the cover cap (1);

the sealing cover is arranged on the surface of the base (5) to form a closed space, and the cigarette lighter (3) and the smoking pipe (4) extend into the closed space from the cover (1); an air inlet is arranged at the central position of the base (5) in the closed space;

the cigarette lighter (3) is vertically fixed at the center of the cover cap (1) and can move up and down along the vertical direction;

one end of the smoke absorbing pipe (4) is aligned with the lower end of the cigarette lighter (3), and the other end of the smoke absorbing pipe penetrates through the cover cap (1).

2. An auxiliary device for PM2.5 detector calibration according to claim 1, characterized in that the base (5) is further provided with a rotating mechanism, the rotating mechanism comprises a rotating shaft (6) and a supporting frame (7) matched with the rotating shaft (6), the rotating shaft (6) is fixed on the base (5), the supporting frame (7) is fixedly connected with the sealing cover lid (1), and the supporting frame (7) can rotate around the rotating shaft (6).

3. An aid device for calibration of PM2.5 detector according to claim 2, characterised in that the maximum rotation angle of the support frame (7) around the rotation axis (6) is 45-60 °.

4. An aid for PM2.5 detector calibration according to claim 1, characterized in that the bottom of the housing (2) is provided with a gasket (8).

5. An aid for PM2.5 detector calibration according to claim 4, c h a r a c t e r i z e d in that the base (5) is further provided with a groove of diameter equal to the diameter of the sealing cap, which is in the groove when closed.

6. The auxiliary device for calibrating the PM2.5 detector as claimed in claim 1, wherein a boss (9) is further arranged at the base (5) right below the cigarette lighter (3), and an object placing hole is formed in the boss (9).

7. An aid for PM2.5 detector calibration according to claim 6, characterised in that the air inlet is provided on a boss (9).

8. An aid for calibration of a PM2.5 detector as claimed in claim 1 or 7, wherein there are 1-4 said inlet holes, said inlet holes having a diameter of 1-3 mm.

9. An aid for PM2.5 sensor calibration as claimed in claim 1, c h a r a c t e r i z e d in that the maximum distance between the lighter (3) and the base (5) is 2/3 for the height of the hood body (2) and the minimum distance is 1/5 for the height of the hood body (2).

10. An auxiliary device for PM2.5 detector calibration according to claim 1, characterized in that 1-3 smoking pipes (4) are provided.

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