CN219224495U - Device for detecting content of particulate matters in air - Google Patents

Abstract

The utility model discloses a device for detecting the content of particulate matters in air, which comprises a bottom plate, wherein supporting rings are arranged on two sides of the top of the bottom plate, a filter screen is arranged in each supporting ring, an image pickup device and a base are respectively arranged above the two supporting rings, the lower part of the outer wall of the base is inserted into one supporting ring, and an air supply unit is arranged above the base. The utility model relates to the technical field of particle detection, in particular to a device for detecting the content of particles in air, which is used for realizing the filtration of active driving gas through a filter screen, has higher attachment rate and shorter waiting time compared with the traditional sedimentation mode, is convenient to calculate the quantity of particles attached to the surface of the filter screen in an image pickup mode, integrates the traditional weight method and particle calculation method, avoids the influence on the accuracy of particle content detection due to weighing precision, improves the attachment rate and attachment speed of the particles, and ensures the accuracy of detection.

Description

Device for detecting content of particulate matters in air

Technical Field

The utility model relates to the technical field of particulate matter detection, in particular to a device for detecting the content of particulate matters in air.

Background

The method for measuring the concentration of the particles in the air mainly comprises the following steps of: the method of weight method, also called weight concentration method, adopts a method of collecting dust by a filter or other separators and weighing, is a reliable method for measuring dust content, and the filter can use filter paper, a microfiltration membrane of polystyrene and the like; concentration specification table comparison method: the application is that the ringeman soot concentration table proposed by M.R. ringeman is wider. The concentration specification table comparison method has the advantages of simplicity, convenience and practicability, and the disadvantage of easy error generation; particle calculation method: the dust in a known air volume is deposited on a transparent surface, and then the number of dust particles is counted under a microscope, and the measurement result is expressed by the number of particles in each cubic centimeter, and can be converted into dust concentration if necessary, and the converted approximation is: 500 dust particles per cubic centimeter, which corresponds to a dust concentration of about 2 mg per cubic meter in a standard state, 2000 dust particles of about 10 mg per cubic meter, 20000 dust particles of about 100 mg per cubic meter; light scattering method: the laser dust meter is provided with a novel horizontal built-in filter membrane on-line sampler, and the instrument can collect particles while continuously monitoring dust concentration so as to analyze the components of the particles and calculate a mass concentration conversion coefficient K value; photometry method: the light with certain intensity passes through the tested gas or a certain amount of tested gas is washed by water, so that dust particles in the gas enter the water, then the light with certain intensity passes through the dust-containing water, the dust particles in the gas or the water generate reflection and scattering phenomena on the light, the intensity of the transmitted light or the scattered light is measured by an optical device, and compared with the standard luminosity, the intensity of the transmitted light or the scattered light can be converted into the dust-containing concentration.

The weight method and the particle calculation method are simple and easy to operate detection modes, but sometimes because the quantity of particles accumulated on the microfiltration membrane is small, the weighing precision is difficult to guarantee, the accuracy of later calculation is influenced, in the particle calculation method, the time required for the particles to settle to the surface of a transparent object is long, and the complete settlement of the particles is difficult to guarantee, so that the precision is still inaccurate.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a device for detecting the content of particulate matters in air, which solves the actual problem to be solved by the prior background technology.

In order to achieve the above purpose, the present utility model is realized by the following technical scheme: the utility model provides an in-air particulate matter content detection device, includes the bottom plate, the top both sides of bottom plate all are provided with the die-ring, the filter screen has been placed to the inside of die-ring, two the top of die-ring is provided with image pickup device and base respectively, the outer wall below of base peg graft in one of them the inside of die-ring to with laminate mutually with the top of filter screen, the top of base is provided with air feed unit; the air supply unit comprises an air bottle, a handle, a main piston, an air ventilation plate, a first spring, an auxiliary piston, a driving rod and a push rod; the bottom of gas cylinder peg graft in the inside of base, the internally mounted of gas cylinder has the master piston, the top fixedly connected with handle of master piston, the inner wall below fixedly connected with aeration board of gas cylinder, the bottom fixedly connected with first spring of aeration board, the bottom fixedly connected with auxiliary piston of first spring, the bottom fixedly connected with actuating lever of auxiliary piston, the below of actuating lever be provided with the rigid coupling in the ejector pin of base inner wall.

Preferably, a sealing sleeve is fixedly connected above the inner wall of the base.

Preferably, a groove corresponding to the driving rod is formed in the top of the ejector rod.

Preferably, both sides of the top of the base are provided with fixing units; the fixing unit comprises a bulge, a clamping rod, a support, a torsion spring and a limiting seat; the utility model discloses a gas cylinder, including the outer wall of gas cylinder, protruding set up in the outer wall below of gas cylinder, bellied side is provided with the draw-in lever, the bottom of draw-in lever is connected with the support through the round pin axle rotation, the bottom of support in the top fixed connection of base, install torsion spring between support and the draw-in lever, one side laminating that the draw-in lever is close to the gas cylinder have the rigid coupling in the spacing seat of base.

Preferably, auxiliary lamps are mounted on both sides of the bottom of the image pickup device.

Preferably, an adjusting unit is arranged between the two supporting rings; the adjusting unit comprises a cross beam, a limiting rod, a second spring and a knob; the two ends of the cross beam are fixedly connected with the side walls of the two supporting rings respectively, a limiting rod is inserted into the bottom of the cross beam, the bottom of the limiting rod is fixedly connected with the top of the bottom plate, a second spring is arranged between the limiting rod and the cross beam, and a knob is fixedly connected to the top of the cross beam.

Advantageous effects

The utility model provides a device for detecting the content of particulate matters in air. The beneficial effects are as follows: this particulate matter content detection device in air, through the cooperation between die-ring, the filter screen, the gas cylinder, the master piston, image pickup device, slave piston and actuating lever, realized that initiative drive gas filters through the filter screen, guarantee that the granule can be quick adhere to on the filter screen surface, the adhesion rate is higher than traditional mode of subsideing, the required latency of adhesion is shorter, be convenient for calculate the granule quantity of adhering to on the filter screen surface through the mode of image pickup simultaneously, with traditional weight method and particle calculation method integration together, avoid because weighing accuracy influences the accuracy that the granule content detected, also improved the adhesion rate and the attachment rate of granule, guarantee the accurate degree of detection.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the base plate, base and cylinder of FIG. 1;

FIG. 3 is a schematic view of the cylinder, vent plate and first spring of FIG. 2;

fig. 4 is a schematic view of the structure of the base plate, cross beam and knob of fig. 1.

In the figure: 1. the device comprises a bottom plate, 2, a supporting ring, 3, an image capturing device, 4, a base, 5, a gas cylinder, 6, a handle, 7, a main piston, 8, a ventilation plate, 9, a first spring, 10, a secondary piston, 11, a driving rod, 12, a top rod, 13, a sealing sleeve, 14, a protrusion, 15, a clamping rod, 16, a support, 17, a torsion spring, 18, a limiting seat, 19, a filter screen, 20, a cross beam, 21, a limiting rod, 22, a second spring, 23, a knob, 24 and an auxiliary lamp.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The components in the present case are sequentially connected by a person skilled in the art, and specific connection and operation sequence should be referred to the following working principle, and the detailed connection means thereof are known in the art, and the following working principle and process are mainly described.

The weight method and the particle calculation method are simpler and easy-to-operate detection modes, but sometimes because the quantity of particles accumulated on the microfiltration membrane is small, the weighing precision is difficult to ensure, the accuracy of later calculation is influenced, in the particle calculation method, the time required for the particles to settle to the surface of a transparent object is long, and the complete settlement of the particles is difficult to ensure, so that the precision is still inaccurate.

In view of the above, the utility model provides a device for detecting the content of particles in air, which realizes that active driving gas is filtered through a filter screen by matching among a support ring, the filter screen, a gas cylinder, a main piston, an image pickup device, an auxiliary piston and a driving rod, ensures that particles can be rapidly attached to the surface of the filter screen, has higher attachment rate than the traditional sedimentation mode, has shorter attachment waiting time, simultaneously facilitates calculation of the number of the particles attached to the surface of the filter screen in an image pickup mode, integrates the traditional weight method and particle calculation method, avoids influencing the accuracy of particle content detection due to weighing precision, improves the attachment rate and attachment speed of the particles, and ensures the accuracy of detection.

As can be seen from fig. 1, 2 and 3, the device for detecting the content of particulate matters in air in the present case comprises a bottom plate 1, wherein two sides of the top of the bottom plate 1 are respectively provided with a supporting ring 2, a filter screen 19 is arranged in each supporting ring 2, an image pickup device 3 and a base 4 are respectively arranged above the two supporting rings 2, the lower part of the outer wall of the base 4 is inserted into the interior of one supporting ring 2 and is attached to the top of the filter screen 19, and an air supply unit is arranged above the base 4; the air supply unit comprises an air bottle 5, a handle 6, a main piston 7, an air ventilation plate 8, a first spring 9, an auxiliary piston 10, a driving rod 11 and a push rod 12; the bottom of gas cylinder 5 is pegged graft in the inside of base 4, and the internally mounted of gas cylinder 5 has master piston 7, and master piston 7's top fixedly connected with handle 6, the inner wall below fixedly connected with aeration panel 8 of gas cylinder 5, the bottom fixedly connected with first spring 9 of aeration panel 8, the bottom fixedly connected with auxiliary piston 10 of first spring 9, the bottom fixedly connected with actuating lever 11 of auxiliary piston 10, the below of actuating lever 11 is provided with ejector pin 12 of rigid coupling in base 4 inner wall.

In the specific implementation process, it is worth particularly pointing out that two supporting rings 2 are arranged, the inner filter screens 19 are used for filtering air from the inside of the gas cylinder 5, and the particles are ensured to be adhered to the surface of the filter screens 19, so that the particle content in a gas sample can be determined through the gas in unit volume and the particle content in the inner filter screens, of course, the specific materials of the filter screens 19 are not limited, for example, filter paper and polystyrene microfiltration membranes, the image pickup device 3 can be an electron microscope or a ccd camera, if the electron microscope is used, the particle number on the surface of the filter screens 19 can be directly observed, if the ccd camera is selected, the particle number on the surface of the filter screens 19 can be calculated through an external processor, and the two supporting rings 2 can be alternatively used, so that the gas in the gas cylinder 5 can be detected in two times, the accuracy of detection is improved, error is reduced, the main piston 7 can draw external gas into the interior of the gas cylinder 5 under the drive of the handle 6, and can also discharge the gas in the gas cylinder 5 out of the gas cylinder 5, of course, in the normal carrying process, due to the elasticity of the first spring 9, the auxiliary piston 10 can seal the bottom opening of the gas cylinder 5, the handle 6 is pushed only to increase the air pressure in the gas cylinder 5, the tightness of the auxiliary piston 10 and the gas cylinder 5 is improved, the condition of gas leakage cannot occur, once the gas cylinder 5 is inserted into the interior of the base 4, the ejector rod 12 presses the driving rod 11, thereby compressing the first spring 9, separating the auxiliary piston 10 from the gas cylinder 5, and pushing the handle 6 can drive the main piston 7 to push the gas in the gas cylinder 5 to the base 4, thereby filtering particles through the filter screen 19.

Further, a sealing sleeve 13 is fixedly connected above the inner wall of the base 4.

In the specific implementation process, it is worth particularly pointing out that the sealing sleeve 13 can ensure the tightness between the base 4 and the gas cylinder 5, and at the same time, the tightness between the gas cylinder 5 and the base 4 is ensured, and the ejector rod 12 only contacts the driving rod 11.

Further, a groove corresponding to the driving rod 11 is formed in the top of the ejector rod 12.

In the specific implementation process, it is worth particularly pointing out that the arrangement of the grooves realizes the limit of the driving rod 11 after the contact between the ejector rod 12 and the driving rod 11, and ensures the verticality of the driving rod 11.

In one embodiment, referring to fig. 1 and 2, both sides of the top of the base 4 are provided with fixing units; the fixing unit comprises a bulge 14, a clamping rod 15, a support 16, a torsion spring 17 and a limiting seat 18; the bulge 14 sets up in the outer wall below of gas cylinder 5, and the side of bulge 14 is provided with clamping lever 15, and the bottom of clamping lever 15 is connected with support 16 through the round pin axle rotation, and the bottom of support 16 is in the top fixed connection of base 4, installs torsion spring 17 between support 16 and the clamping lever 15, and the laminating of the side that clamping lever 15 is close to gas cylinder 5 has the spacing seat 18 of rigid coupling in base 4.

In the specific implementation process, it is worth particularly pointing out that the top of the clamping rod 15 is arc-shaped, the bottom of the bulge 14 is slope, so, when the gas cylinder 5 is inserted into the base 4, the bulge 14 is in contact with the clamping rod 15, the clamping rod 15 is driven to move outwards until the gas cylinder 5 is inserted, under the action of the torsion spring 17, the clamping rod 15 is just clamped at the top of the bulge 14, the fixation of the gas cylinder 5 and the base 4 is realized, the angle of the clamping rod 15 can be prevented from being too large by the limiting seat 18, and the influence on the insertion of the gas cylinder 5 into the base 4 is avoided.

Further, auxiliary lamps 24 are mounted on both sides of the bottom of the image pickup device 3.

In the specific implementation, it should be noted that the auxiliary lamp 24 may perform the function of light supplement when the light is insufficient, and the specific model is not limited, so long as the use requirement is satisfied.

In one embodiment, referring to fig. 1 and 4, an adjusting unit is disposed between two rings 2; the adjusting unit comprises a cross beam 20, a limiting rod 21, a second spring 22 and a knob 23; two ends of the cross beam 20 are fixedly connected with the side walls of the two supporting rings 2 respectively, a limiting rod 21 is inserted into the bottom of the cross beam 20, the bottom of the limiting rod 21 is fixedly connected with the top of the bottom plate 1, a second spring 22 is arranged between the limiting rod 21 and the cross beam 20, and a knob 23 is fixedly connected with the top of the cross beam 20.

In the specific implementation process, it is worth particularly pointing out that the cross beam 20 can rotate around the limiting rod 21, wherein the second spring 22 gives the cross beam 20 an upward elastic force, so that the supporting ring 2 at one end of the cross beam 20 can be sleeved at the bottom of the base 4, and when the cross beam 20 is pressed downwards, the supporting ring 2 can be separated from the base 4 through the compression of the second spring 22, and the positions of the two supporting rings 2 can be changed through the knob 23, so that the two filter screens 19 can be conveniently attached and observed respectively.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The term "comprising" an element defined by the term "comprising" does not exclude the presence of other identical elements in a process, method, article or apparatus that comprises the element.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a particulate matter content detection device in air, includes bottom plate (1), its characterized in that: the two sides of the top of the bottom plate (1) are respectively provided with a supporting ring (2), a filter screen (19) is arranged in the supporting rings (2), an image pickup device (3) and a base (4) are respectively arranged above the two supporting rings (2), the lower part of the outer wall of the base (4) is inserted into the interior of one supporting ring (2) and is attached to the top of the filter screen (19), and an air supply unit is arranged above the base (4);

the air supply unit comprises an air bottle (5), a handle (6), a main piston (7), an air ventilation plate (8), a first spring (9), an auxiliary piston (10), a driving rod (11) and a push rod (12);

the bottom of gas cylinder (5) peg graft in the inside of base (4), the internally mounted of gas cylinder (5) has master piston (7), the top fixedly connected with handle (6) of master piston (7), the inner wall below fixedly connected with aeration board (8) of gas cylinder (5), the bottom fixedly connected with first spring (9) of aeration board (8), the bottom fixedly connected with auxiliary piston (10) of first spring (9), the bottom fixedly connected with actuating lever (11) of auxiliary piston (10), the below of actuating lever (11) be provided with the rigid coupling in ejector pin (12) of base (4) inner wall.

2. The apparatus for detecting the content of particulate matter in air according to claim 1, wherein: a sealing sleeve (13) is fixedly connected above the inner wall of the base (4).

3. The apparatus for detecting the content of particulate matter in air according to claim 1, wherein: the top of the ejector rod (12) is provided with a groove corresponding to the driving rod (11).

4. The apparatus for detecting the content of particulate matter in air according to claim 1, wherein: both sides of the top of the base (4) are provided with fixing units;

the fixing unit comprises a bulge (14), a clamping rod (15), a support (16), a torsion spring (17) and a limiting seat (18);

the utility model discloses a gas cylinder, including protruding (14) and clamping rod (15), protruding (14) set up in the outer wall below of gas cylinder (5), the side of protruding (14) is provided with clamping rod (15), the bottom of clamping rod (15) is connected with support (16) through the round pin axle rotation, the bottom of support (16) in the top fixed connection of base (4), install torsion spring (17) between support (16) and clamping rod (15), one side laminating that clamping rod (15) are close to gas cylinder (5) have rigid coupling in spacing seat (18) of base (4).

5. The apparatus for detecting the content of particulate matter in air according to claim 1, wherein: auxiliary lamps (24) are arranged on two sides of the bottom of the image pickup device (3).

6. The apparatus for detecting the content of particulate matter in air according to claim 1, wherein: an adjusting unit is arranged between the two supporting rings (2);

the adjusting unit comprises a cross beam (20), a limiting rod (21), a second spring (22) and a knob (23);

the two ends of the cross beam (20) are fixedly connected with the side walls of the two supporting rings (2) respectively, a limiting rod (21) is inserted into the bottom of the cross beam (20), the bottom of the limiting rod (21) is fixedly connected with the top of the bottom plate (1), a second spring (22) is arranged between the limiting rod (21) and the cross beam (20), and a knob (23) is fixedly connected with the top of the cross beam (20).

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