CN212008226U - Atmospheric particulate concentration monitoring equipment - Google Patents
Atmospheric particulate concentration monitoring equipment Download PDFInfo
- Publication number
- CN212008226U CN212008226U CN202020509641.0U CN202020509641U CN212008226U CN 212008226 U CN212008226 U CN 212008226U CN 202020509641 U CN202020509641 U CN 202020509641U CN 212008226 U CN212008226 U CN 212008226U
- Authority
- CN
- China
- Prior art keywords
- atmospheric
- moving part
- air inlet
- air
- particulate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses a monitoring facilities of atmospheric particulates concentration, include: the air inlet device comprises an air inlet pipe, a fixing part and a moving part, wherein a first air path in the fixing part and a second air path in the moving part are not in the same vertical direction. The utility model discloses in the measurement process, large granule thing and little particulate matter separate as far as possible in the gas motion in-process, reduce the gas loss volume, and measuring error also reduces greatly.
Description
Technical Field
The utility model belongs to the technical field of the atmospheric particulates monitoring, in particular to monitoring facilities of atmospheric particulates concentration.
Background
In recent years, with the continuous progress of urbanization and industrialization, atmospheric particulates become the primary pollutants affecting the air quality of urban environments in China. The particulate matter mainly refers to inhalable particulate matter (PM10, i.e., particulate matter having an aerodynamic equivalent diameter of 10 μm or less) and fine particulate matter (PM2.5, i.e., particulate matter having an aerodynamic equivalent diameter of 2.5 μm or less) and is divided into primary particulate matter and secondary particulate matter. At present, monitoring equipment on the market detects the in-process, and the gas circuit among the air inlet unit is mostly in same straight line direction, because the radiation source is solid, during the time of admitting air, the particulate matter can walk around the radiation source and get on the paper area, can not directly get on the paper area. So cause gas loss on the one hand, on the other hand, at gas loss in-process, large granule thing and little particulate matter also can not separate well, and the testing effect just has very big error.
SUMMERY OF THE UTILITY MODEL
For solving the problem that exists among the prior art, the utility model provides a monitoring facilities of atmospheric particulates concentration through the position relation of the second gas circuit in first gas circuit in the change fixed part and the motion portion, makes both not in same vertical direction for the motion trail of the little particulate matter in the gas that gets into from the external world has the radian for the bending, and the large granule enables in the measurement process like this because the effect of gravity moves down, and the gas loss volume reduces, and measuring error also reduces greatly.
The problem of the utility model is realized by following technical scheme: the utility model provides a monitoring facilities of atmospheric particulates concentration, include:
a box body;
the air inlet device is arranged in the box body;
the paper tape conveying device and the air inlet device form a detection air path;
the driving device is arranged in the box body and is connected with the air inlet device;
the flow control device is connected with the detection gas circuit;
the detection device is connected with the air inlet device;
the air inlet device comprises an air inlet pipe, a fixing part and a moving part, wherein a first air path in the fixing part and a second air path in the moving part are not in the same vertical direction, and the second air path is formed by offsetting a preset distance from the center of the moving part along the longitudinal direction of the moving part.
In one embodiment, the predetermined distance is 1/3-1/2 of the longitudinal length of the moving part.
In one embodiment, the horizontal distance between the first air path and the second air path is 1/4-1/2 of the length of the moving part.
In one embodiment, a transparent plate is arranged on the box body on the surface opposite to the paper tape conveying device.
In one embodiment, the air inlet pipe is cylindrical, spiral or curved arc in shape.
In one embodiment, a sealing device is arranged between the moving part and the fixed part.
In one embodiment, the sealing device is an O-ring.
In one embodiment, the driving device includes:
a first motor;
and one end of the eccentric shaft is connected with the rotating shaft of the first motor, and the other end of the eccentric shaft is connected with the fixing part of the air inlet device.
In one embodiment, the tape transport apparatus comprises:
a first reel;
the second tape reel is in transmission connection with the first tape reel;
the second motor is connected with the first belt disc;
the supporting wheel is arranged on the same side with the second reel and at the same height with the moving part;
and the paper tape is connected with the first tape reel through the second tape reel, the supporting wheel and the detection device.
In one embodiment, the detection device comprises:
the radioactive source is connected with the second gas circuit of the moving part;
the receiving and measuring unit is arranged opposite to the radioactive source;
and the data processing unit is connected with the receiving and measuring unit.
In one embodiment, a display screen is further arranged on one surface of the box body.
The utility model discloses in, through the position relation who changes the second gas circuit in first gas circuit in the fixed part and the motion part, make both not in same vertical direction for the movement track of the little particulate matter in the gas that gets into from the external world has the radian for the bending, and the large granule enables like this in the measurement process because the effect of gravity downstream, and the gas loss reduces, and measuring error is corresponding the reduction also. The utility model discloses a monitoring facilities of atmospheric particulates concentration, simple structure is compact, convenient to carry. Other features, benefits and advantages will be apparent from the disclosure including the description and claims detailed herein.
Drawings
FIG. 1: the utility model discloses a perspective view of monitoring facilities in an embodiment;
FIG. 2: the utility model discloses a section view of monitoring facilities in an embodiment;
FIG. 3: the utility model discloses an embodiment is the inside structure sketch map of monitoring facilities;
FIG. 4: the structure of the driving device in one embodiment of the present invention is schematically illustrated;
FIG. 5: the schematic view of the air inlet device in one embodiment of the present invention;
FIG. 6: the utility model discloses an embodiment monitoring facilities connects the schematic structure of sampling rod.
Description of the symbols
01 port 3024 through hole
101 case 401 first tape reel
102 transparent plate 402 second reel
103 fixing the plate 403 second motor
201 air inlet pipe 404 supporting wheel
202 fixed part 406a first rotating shaft
2021 first air passage 406b second rotary shaft
203 motion part 501 radiation source
2031 second gas circuit 502 receiving measuring unit
301 first motor 503 display
302 eccentric shaft 601 first sealing device
3021 second sealing device for rotating shaft 602
3022 first end 02 sampling rod
3022a first eccentric Cylinder
3023 second end
3023a second eccentric Cylinder
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.
It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the invention in a schematic manner, and only the components related to the invention are shown in the drawings rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, quantity and proportion of the components in actual implementation may be changed at will, and the layout of the components may be more complicated. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated and more attention may be paid. Unless otherwise specified, the terms "first" and "second," when appearing in the present disclosure, are used for descriptive and differentiating purposes only and are not to be construed as indicating or implying relative importance.
The utility model discloses a change the relative position relation of the second gas circuit in first gas circuit in the fixed part and the motion part, make both not in same vertical direction, just the second gas circuit by the central point of motion part puts, follows the longitudinal direction of motion part squints a preset distance, makes the motion trail of the little particulate matter in the gas of inhaling from the external world have the radian for the bending on the one hand, and the large granule is because the effect of gravity moves down, and on the other hand, longitudinal deviation, the motion trail of can drawing big gas again, enables large granule and little granule like this and separates better to in the measurement process, the gas loss volume reduces, and measuring error also can reduce greatly.
The utility model provides a monitoring facilities of atmospheric particulates concentration for the suspended particles concentration that contains in the detection air, the suspended particles for example be, PM2.5 atmospheric particulates or PM10 atmospheric particulates.
Referring to fig. 1, the present invention provides an atmospheric particulate concentration monitoring apparatus, including: the device comprises a box body 101, an air inlet device, a paper tape conveying device, a driving device, a flow control device and a detection device.
Referring to fig. 1 and 6, a port 01 connected to a sampling rod is disposed at the top end of the box 101, and a port 01 connected to a sampling rod 02 is disposed at the top end of the box 101. One end of the sampling rod 02, for example, an air inlet, is communicated with the atmosphere, and the other end, namely, an air outlet, is connected with the monitoring device. The shape and material of the sampling rod 02 are not particularly limited, such as tubular glass, for collecting and transporting the atmospheric particulates into the monitoring device, and further, a stainless steel member is sleeved outside the sampling rod 02 to protect the sampling rod 02. Further, the top end of the sampling rod 02 may be provided with a cutting head (not shown), and the concentration of the atmospheric particulates with different particle sizes can be tested by changing the type of the cutting head (such as PM10, PM2.5, TSP) during actual use to cut different particle sizes.
Referring to fig. 1, the material and shape of the box 101 are not particularly limited, such as a housing with certain strength and rigidity for accommodating the driving device, the detecting device, and other structures, specifically, a steel casting box, a steel plate welded box, and a plastic box. The box 101 is integrally formed with the components inside the box. The dimensions of the box 101 have a length of, for example, 25-40cm, a width of 35-50cm, and a height of 25-40 cm. A transparent plate 102 is provided on one side of the case 101 opposite to the tape feeding device, for the purpose of facilitating observation of real time conditions in the case 101 and for facilitating replacement of the tape.
Referring to fig. 1 and 2, the air intake device is disposed in the box 101 and includes an air intake pipe 201, a fixed portion 202, and a moving portion 203. The inlet pipe 201 is connected with the port 01 and is used for being communicated with a sampling rod, and the shape of the inlet pipe 001 is cylindrical, spiral or curved arc, for example. The fixing portion 202 is connected to the air inlet pipe 201, the fixing portion 202 is provided with a first air passage 2021, and the first air passage 2021 is connected to the air inlet pipe 201. A first sealing means 601 is arranged between the fixed part 202 and the moving part 203.
Referring to fig. 1, fig. 2 and fig. 5, a second air path 2031 is disposed in the moving portion 203, the second air path 2031 and the first air path 2021 are not in the same vertical direction, and the second air path 2031 is offset from the center of the moving portion 203 by a predetermined distance along the longitudinal direction of the moving portion 203. The predetermined distance is for example 1/3-1/2 of the longitudinal length of the moving part 203. The horizontal distance between the first air path 2021 and the second air path 2031 is, for example, 1/4-1/2 of the length of the moving part 203. Specifically, for example, the position of the first air path 2021 is located at a position opposite to the center of the moving portion 203, and the second air path is offset by a preset distance (i.e., longitudinally offset) along the longitudinal direction of the moving portion 203 at the position of the center of the moving portion 203. For another example, the position of the first air path 2021 is opposite to the center of the moving portion 203, the position of the second air path 2031 is offset by a predetermined distance (i.e., horizontal offset) along the center of the moving portion 203 in the transverse direction of the moving portion 203, and the position of the second air path 2031 is offset by a predetermined distance (i.e., vertical offset) along the center of the moving portion 203 in the longitudinal direction of the moving portion 203. Set up like this, on the one hand make the motion trail of the little particulate matter in the gas of inhaling from the external world have the radian for the bending, and the large granule is because the effect of gravity downstream, and on the other hand enables the large granule like this and divides better with the tiny particle to in measurement process, the gas loss volume reduces, and measuring error also can reduce greatly.
Referring to fig. 2 and fig. 4, the driving device is connected to the fixing portion 202, and the driving device includes: the air intake device comprises a first motor 301 and an eccentric shaft 302, one end of the eccentric shaft 302 is connected with a rotating shaft of the first motor 301, the other end of the eccentric shaft 302 is connected with a fixed part 202 of the air intake device, the fixed part 202 is in transmission connection with the moving part 203, for example, a driving shaft is arranged on the fixed part 202 and is in transmission connection with a driven shaft on the moving part 203 through a coupling, and the moving part 203 is driven to move up and down. Specifically, the eccentric shaft 302 includes a rotating shaft 3021, a first end 3022 and a second end 3023 on the rotating shaft 3021, and a first eccentric cylinder 3022a and a second eccentric cylinder 3023a, which may also be elliptical cylinders, respectively disposed on the first end 3022 and the second end 3023 of the rotating shaft 3022, one end of the rotating shaft 3021 passes through the first end 3022 of the end and is opened with a through hole 3024 for connecting to the rotating shaft of the first motor 301, and the other end of the rotating shaft 3021 is connected to the second end 3023 of the rotating shaft 3021. The second eccentric cylinder 3023a is connected to the fixed portion 202, and when the first motor 301 rotates, the eccentric shaft 302 drives the moving portion 203 to move up and down through the fixed portion 202.
Referring to fig. 2 and 4, in detail, when the eccentric shaft 302 rotates 180 degrees, the moving part 203 moves downward to contact with the tape feeding device by using the position of the second eccentric cylinder 3023a on the surface of the second end 3023, i.e. the distance between the bottom of the second eccentric cylinder 3023a and the bottom of the second end 3023; when the first motor 301 is rotated 180 degrees again, that is, 360 degrees, the eccentric shaft 302 returns to the original position, so that the moving portion 203 moves upward to be separated from the tape feeding unit.
Referring to fig. 3, further, a fixing plate 103 is disposed in the box 101 to divide the box 101 into an outer unit and an inner unit, so as to facilitate installation and fixing of the devices in the monitoring apparatus. The first motor 301 is located at one side of the fixed plate 103, i.e., an inner unit, such as an air intake device, and at the other side of the fixed plate 103, i.e., an outer unit, and the eccentric shaft 302 penetrates the fixed plate 103 and is connected to the fixing portion 202. Further, a plurality of brackets are mounted on the fixing plate 103 for supporting the first motor 301, the eccentric shaft 302, the fixing portion 202 and the moving portion 203.
Referring to fig. 2, the paper tape conveying device is in contact with and separated from the air inlet device to form an air path for detection by a detection device as described below. The paper tape conveying device comprises: a first reel 401, a second reel 402, a second motor 403, a support wheel 404 and a paper web. Wherein the second reel 402 is in driving connection with the first reel 401, for example via a spindle 406, and the second reel 402 and the first reel 401 are adapted to hold the paper tape. Specifically, the second reel 402 is mounted on the fixed plate 103 through a rotating shaft, and freely rotates on the fixed plate 103, and the first rotating shaft 406a of the first reel 401 is in transmission connection with the second rotating shaft 406b of the second reel 402 through a paper tape. The second motor 403 is connected to the first tape reel 401. The supporting wheel 404 is located on the same side as the second reel 402 and at the same height as the moving portion 203, so as to ensure that the tape is not deformed by gravity during the feeding or collecting process, thereby smoothly guiding the tape into the moving portion 203. The paper web is connected to the first tape reel 401 via the second reel 402, a support wheel 404 and a detection device. The second motor 403 controls the first reel 401 to collect and wind the paper web from the second reel 402, i.e. to move the paper web between the air opening in the moving part 203 and the detection means.
Referring to fig. 2, in an embodiment of the present disclosure, the second motor 403 is located at one side of the fixing plate 103, i.e. an inner unit, the paper tape, the first tape reel 401 and the second tape reel 402 are located at the other side of the fixing plate 103, i.e. an outer unit, and the rotating shaft of the first tape reel 401 penetrates through the fixing plate 103 and is connected to the second motor 403. It should be noted that the paper tape is used, for example, in the range of 50 to 100g/m2A glass fiber membrane or quartz membrane within the confines for enriching the atmospheric particulates from the sampling rod 02 and air intake device and providing a direct test target for the detection device as described below.
Referring to fig. 3, it should be noted that the first motor 301 and the second motor 403 are not particularly limited, and for example, claw pole motors may be adopted, and the rotation steps of the first motor 301 and the second motor 403 are controlled by a first photoelectric switch and a second photoelectric switch (not shown in the figure) respectively arranged in the box 101. It should be noted that the paper tape is used, for example, in the range of 50 to 100g/m2A glass fiber membrane or quartz membrane within the confines for enriching the atmospheric particulates from the sampling rod 02 and air intake device and providing a direct test target for the detection device as described below.
Referring to fig. 2, when the monitoring operation of the atmospheric particulate concentration is performed, the second motor 403 is started to rotate, the second reel 402 rotates along with the rotation of the first reel 401, so as to drive the blank paper tape on the second reel 402 to move forward, and the blank paper tape is fixed during a measurement period, and the data of the blank paper tape is detected by a detection device as described below; then the first motor 301 starts to rotate, the moving part 203 of the air inlet device moves downwards, the air port of the moving part 203 contacts the blank paper tape and is sealed by the sealing device to form a communicated detection air path, then the blank paper tape adsorbs the atmospheric particulates from the communication sampling rod 02 under the control of a flow control device as described below, the first motor 301 rotates again, the moving part 203 of the air inlet device moves upwards, the air port of the moving part 203 leaves the paper tape adsorbing the atmospheric particulates, the detection air path is disconnected, the concentration of the atmospheric particulates is detected by the detection device as described below, at the end of a measurement period, the second motor 403 rotates again, the adsorbed paper tape continues to advance and is wound on the first tape spool 401, and meanwhile, the next blank paper tape on the second tape spool 402 is driven to advance, and enters the next measurement cycle.
Referring to fig. 2, the sealing device is located in the box 101 for forming a communicated detection gas path, and specifically, in an embodiment of the present invention, the sealing device has a first sealing device 601 and a second sealing device 602, which are respectively located on the air inlet device and the detection device, and seal the gas path of the atmospheric particulates entering and exiting the monitoring device to form a communicated detection gas path. Specifically, the first sealing device 601 is located between the fixed part 202 and the moving part 203 in the air inlet device, in the process that the moving part 203 moves downwards, the moving part 203 is far away from the fixed part 202, the air port of the moving part 203 contacts with the paper tape, the first sealing device 601 expands and seals to seal the second air path 2031, namely the upper cavity, and the detection air paths are communicated; in the process that the moving part 203 moves upwards, the moving part 203 is close to the fixed part 202, the air port is far away from the paper tape, the detection air path is disconnected, and the first sealing device 601 is compressed. The second sealing means 602 is located at the lower end of the detection means to seal the lower chamber.
It should be noted that the first sealing device 601 and the second sealing device 602 are, for example, identical or different O-rings, for example, foamed O-rings, having, for example, a diameter of 5mm to 20 mm. It should be understood that the first sealing device 601 and/or the second sealing device 602 include, but are not limited to, an O-ring, and any sealing device capable of forming a connected air path during the measurement of the atmospheric particulate concentration by the driving device should be covered by the scope of the present invention.
Referring to fig. 2, the detecting device includes: a radiation source 501, a receiving measurement unit 502 and a data processing unit. The radiation source 501 is disposed inside the moving portion 203 and connected to the second gas path 2031 of the moving portion 203, and the radiation source 501 is, for example, a beta-ray radiation source. The receiving and measuring unit 502 is arranged opposite to the radiation source 201. The data processing unit is connected to the receiving and measuring unit 502. Wherein the paper tape is placed between the radiation source 501 and the receiving and measuring unit 502. The data processing unit comprises a collector, a processor, a memory, a circuit control system and a display 503, wherein the input end of the collector is connected with the output end of the receiving and measuring unit 502 to collect the electric signal of the receiving and measuring unit 502, the output end of the collector is connected with the input end of the processor, and the processed measuring data is stored in the first memory through the output end of the processor; the memory is connected with the display and displays the measuring result. Specifically, the data processing unit includes a collector, a processor, a memory, a circuit control system, and a display 503; the input end of the collector is connected with the output end of the receiving and measuring unit 502, the electric signal of the receiving and measuring unit 502 is collected, the output end of the collector is connected with the input end of the processor, and the processed measuring data is stored in the first memory through the output end of the processor; the memory is connected with the display and displays the measuring result.
Referring to fig. 2, in an embodiment, the radiation source 501 is, for example, a ring and is located in the same vertical direction as the air inlet device, for example, the air inlet pipe 201, the first air path 2021, the second air path 2031 and the radiation source 501 are located in the same vertical direction, so that when particles in the atmosphere are inhaled, the air directly hits the paper tape, thereby further reducing the air loss. It should be noted that, in the present invention, the radiation source 501 and the second gas path are in the same vertical direction.
Referring to fig. 1 and fig. 3, the monitoring device further includes a flow control device, and the flow control device is connected to the detection gas circuit. The flow control device comprises an air pump (not shown in the figure), and a flow valve, a flow sensor (not shown in the figure) and a flow meter (not shown in the figure) which are fixed at an air inlet of the air pump, wherein the air pump is externally arranged near the noise reduction monitoring equipment, the flow valve is positioned in an inner side unit of the fixing plate 103 of the box body 101 and is communicated with an air outlet on the box body 101 through a valve pipe, and then the flow valve is connected with the detection air path, and the system is pumped by the air pump. The utility model provides a monitoring facilities of monitoring atmospheric particulates concentration, flow control device carries out intermittent type nature to the gas circuit that comes from whole system and bleeds, when monitoring the operation, forms measuring cycle, for example when the air pump does not bleed, the particulate matter does not flow, and when the air pump bleeds, atmospheric particulates is according to predetermined flow, for example 1-10L/min, to the direction of paper tape flows, the atmospheric particulates load is in the paper tape surface, gas is through air pump discharge system.
Referring to fig. 2, in an embodiment, during the monitoring operation of the concentration of the atmospheric particulates, in a measurement period, the blank paper tape is fixed, the air pump is closed, the air pump does not pump air, and air in the atmosphere enters from the air intake device, because the first air path 2021 and the second air path 2031 in the air intake device are not in the same vertical direction, and the second air path 2031 is offset from the center of the moving portion 203 by a predetermined distance along the longitudinal direction of the moving portion 203, the atmospheric large particulates and the atmospheric small particulates can be separated as far as possible, so that the loss can be reduced as far as possible, and the measurement result is relatively accurate. After gas in the atmosphere enters, the detection device detects the blank paper tape to obtain a first monitoring concentration; the motion part 203 moves downwards, the gas port contacts the blank paper tape, the gas port passes through the sealing device seals the detection gas circuit that forms the intercommunication, the air pump starts, and the air pump bleeds, comes from the intercommunication atmospheric particulates enrichment in the detection gas circuit of sampling rod 02 is in on the blank paper tape, after the air pump was closed, the gas port left the blank paper tape, detection device detects the paper tape that adsorbs atmospheric particulates, acquires the second monitoring concentration, acquires through predetermined ratio relation the concentration of atmospheric particulates.
Referring back to fig. 2 and 3, in an embodiment of the present disclosure, a detection device is composed of the radiation source 501 and a receiving and measuring unit 502 disposed opposite to the radiation source, and the concentration of the atmospheric particulates is monitored by the beta-ray method. The radiation source 501 is disposed in the cavity of the moving portion 203 of the driving device, and is close to the second gas path 2031. The radiation source 501 is arranged opposite to the receiving and measuring unit 502, and the paper tape is placed between the radiation source and the receiving and measuring unit. The relative positions of the radiation source 501, the receiving and measuring unit 502 disposed opposite to the radiation source 501, and the paper tape are kept unchanged, and the two measurement conditions are kept consistent.
Referring to fig. 2 and fig. 3, when the monitoring operation of the atmospheric particulate concentration is performed, in a measurement period, the blank paper tape is fixed, the moving portion of the air intake device moves downward, the air port contacts the blank paper tape and is sealed by the sealing device to form a communicated detection air path, the atmospheric particulate is enriched on the surface of the paper tape under the control of the flow control device, and then the radioactive sources 501 sequentially irradiate the paper tape to form dust spots, and the dust spots are received by the receiving and measuring unit 502 and transmitted to the data processing unit, so as to obtain the atmospheric particulate concentration in the air.
Referring to fig. 1, the monitoring apparatus for atmospheric particulate matter concentration further includes a dynamic heating system, the dynamic heating system includes a dynamic heater (not shown in the figure) fixed on the sampling rod 1 for monitoring the air temperature and humidity in the sampling rod 02, the air temperature and humidity data detected by the dynamic heater is transmitted to the detection device, and the detection device controls the heating operation thereof, such as controlling the dynamic heater to start, close, and adjust the heating power.
The utility model discloses, in predetermined period, keep detection device's height unchangeable to through control flow control device, locate the facula intensity that detects the blank paper tape department of unadsorbing and the facula intensity of paper tape department of adsorbing atmospheric particulates at the same position of paper tape respectively, accomplish test period. The utility model discloses, the test is sensitive, convenient, and data is reliable.
The utility model provides a pair of monitoring facilities of atmospheric particulates concentration through the relative position relation that changes the second gas circuit in first gas circuit in the fixed part and the motion portion, makes both not in same vertical direction, just the second gas circuit by the central point of motion portion puts, follows the longitudinal direction of motion portion, the predetermined distance of skew makes the motion trail of the tiny particle thing in the gas of inhaling from the external world have the radian for the bending on the one hand, and the large granule is owing to the effect downstream of gravity, and on the other hand, the longitudinal deviation can draw the motion trail of big gas again, enables large granule and tiny particle like this and separates better to in the measurement process, the gas loss volume reduces, and measuring error also can reduce greatly, and data are reliable.
The above description is only a preferred embodiment of the present application and the explanation of the applied technical principle, and it should be understood by those skilled in the art that the scope of the present application is not limited to the technical solution of the specific combination of the above technical features, and also covers other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept, for example, the technical solutions formed by mutually replacing the above technical features (but not limited to) having similar functions disclosed in the present application.
Besides the technical features described in the specification, other technical features are known to those skilled in the art, and further description of the other technical features is omitted here in order to highlight the innovative features of the present invention.
Claims (10)
1. An atmospheric particulate matter concentration monitoring apparatus, comprising:
a box body;
the air inlet device is arranged in the box body;
the paper tape conveying device and the air inlet device form a detection air path;
the driving device is arranged in the box body and is connected with the air inlet device;
the flow control device is connected with the detection gas circuit;
the detection device is connected with the air inlet device;
the air inlet device comprises an air inlet pipe, a fixing part and a moving part, wherein a first air path in the fixing part and a second air path in the moving part are not in the same vertical direction, and the second air path is formed by offsetting a preset distance from the center of the moving part along the longitudinal direction of the moving part.
2. The apparatus for monitoring concentration of atmospheric particulates of claim 1, wherein the predetermined distance is 1/3-1/2 of a longitudinal length of the moving part.
3. The apparatus for monitoring concentration of atmospheric particulates of claim 1, wherein the horizontal distance between the first gas path and the second gas path is 1/4-1/2 of the length of the moving part.
4. The atmospheric particulate concentration monitoring apparatus according to claim 1, wherein a transparent plate is provided on the case on a side opposite to the tape feeding device.
5. The atmospheric-particulate-matter concentration monitoring apparatus according to claim 1, wherein the intake pipe is cylindrical, spiral, or curved arc in shape.
6. The atmospheric-particulate-concentration monitoring apparatus according to claim 1, wherein a sealing device is provided between the moving portion and the fixed portion.
7. The atmospheric-particulate-concentration monitoring apparatus of claim 6, wherein the sealing device is an O-ring seal.
8. The atmospheric-particulate-concentration monitoring apparatus according to claim 1, wherein the drive device includes:
a first motor;
and one end of the eccentric shaft is connected with the rotating shaft of the first motor, and the other end of the eccentric shaft is connected with the fixing part of the air inlet device.
9. The atmospheric particulate concentration monitoring apparatus of claim 1, wherein the tape transport device includes:
a first reel;
the second tape reel is in transmission connection with the first tape reel;
the second motor is connected with the first belt disc;
the supporting wheel is arranged on the same side with the second reel and at the same height with the moving part;
and the paper tape is connected with the first tape reel through the second tape reel, the supporting wheel and the detection device.
10. The atmospheric-particulate-matter-concentration monitoring apparatus according to claim 1, wherein the detection device includes:
the radioactive source is connected with the second gas circuit of the moving part;
the receiving and measuring unit is arranged opposite to the radioactive source;
and the data processing unit is connected with the receiving and measuring unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020509641.0U CN212008226U (en) | 2020-04-09 | 2020-04-09 | Atmospheric particulate concentration monitoring equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020509641.0U CN212008226U (en) | 2020-04-09 | 2020-04-09 | Atmospheric particulate concentration monitoring equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212008226U true CN212008226U (en) | 2020-11-24 |
Family
ID=73404100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020509641.0U Active CN212008226U (en) | 2020-04-09 | 2020-04-09 | Atmospheric particulate concentration monitoring equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212008226U (en) |
-
2020
- 2020-04-09 CN CN202020509641.0U patent/CN212008226U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201637649U (en) | Measuring instrument for atmospheric particulate matter | |
| CN106525520A (en) | Stationary combustion source flue gas mixing channel dilution multistage sampling device | |
| CN213779641U (en) | Atmospheric particulate collection device | |
| CN104105443A (en) | Gas sampling device and method | |
| CN203749643U (en) | Exposure equipment for smoke inhaled by mouth and nose of animal | |
| CN111077049A (en) | Portable β ray method particulate matter concentration monitoring system | |
| CN212008226U (en) | Atmospheric particulate concentration monitoring equipment | |
| CN108037115A (en) | A kind of sulfur dioxide detecting system and detection method | |
| CN210953726U (en) | Portable monitoring mechanism for concentration of atmospheric particulates | |
| CN210953727U (en) | Monitoring mechanism for concentration of atmospheric particulate matter | |
| CN212008228U (en) | Atmospheric particulate concentration's monitoring facilities that makes an uproar falls | |
| CN109238790A (en) | A kind of multipassage rotary formula air granule sampler and its application method | |
| CN212008227U (en) | Multichannel atmospheric particulates concentration monitoring mechanism | |
| CN205941281U (en) | Binary channels raise dust monitor | |
| CN111337399B (en) | Monitoring mechanism for concentration of atmospheric particulate matter | |
| CN103018146A (en) | PM2.5 monitor with aerosol humidity controller | |
| CN210474020U (en) | Atmosphere simulation equipment | |
| CN212658514U (en) | Sampling device for exhaust-gas detection | |
| CN209027884U (en) | A kind of airborne particulate acquisition device | |
| CN106896045A (en) | A kind of micro-integrated breath mask recruitment evaluation device | |
| CN114594032A (en) | Outdoor combination formula ray method particulate matter monitoring devices | |
| CN114965875A (en) | Portable diversified atmospheric environment monitoring devices | |
| CN202928928U (en) | PM2.5 monitor with aerosol humidity controller | |
| CN209086116U (en) | A kind of β ray PM2.5 on-line testing equipment of integral structure | |
| JP2560972Y2 (en) | Wind direction type gas sampling device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |