CN110595844A - Control system and testing device of electromagnetic oscillation dust distribution device - Google Patents
Control system and testing device of electromagnetic oscillation dust distribution device Download PDFInfo
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- CN110595844A CN110595844A CN201910859014.1A CN201910859014A CN110595844A CN 110595844 A CN110595844 A CN 110595844A CN 201910859014 A CN201910859014 A CN 201910859014A CN 110595844 A CN110595844 A CN 110595844A
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- 239000000428 dust Substances 0.000 title claims abstract description 227
- 238000012360 testing method Methods 0.000 title claims abstract description 74
- 238000009826 distribution Methods 0.000 title claims abstract description 21
- 230000010355 oscillation Effects 0.000 title claims abstract description 21
- 238000005070 sampling Methods 0.000 claims abstract description 120
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 239000006185 dispersion Substances 0.000 claims abstract description 15
- 239000004744 fabric Substances 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 claims abstract description 10
- 239000013618 particulate matter Substances 0.000 claims description 20
- 239000012530 fluid Substances 0.000 claims description 19
- 238000002360 preparation method Methods 0.000 claims 2
- 208000004350 Strabismus Diseases 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 230000005389 magnetism Effects 0.000 abstract 1
- 239000012528 membrane Substances 0.000 description 32
- 239000002245 particle Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 10
- 238000005259 measurement Methods 0.000 description 9
- 230000009471 action Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000008277 atmospheric particulate matter Substances 0.000 description 4
- 230000002238 attenuated effect Effects 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000005250 beta ray Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/01—Testing or calibrating of weighing apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G9/00—Methods of, or apparatus for, the determination of weight, not provided for in groups G01G1/00 - G01G7/00
- G01G9/005—Methods of, or apparatus for, the determination of weight, not provided for in groups G01G1/00 - G01G7/00 using radiations, e.g. radioactive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2273—Atmospheric sampling
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
- G01N2001/4088—Concentrating samples by other techniques involving separation of suspended solids filtration
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Immunology (AREA)
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Abstract
The invention discloses a control system of an electromagnetic oscillation dust distribution device, which comprises: the main body structure is a hollow structure and is connected to a host of the atmospheric sampling equipment; send dirt pipeline, the entry and the outside dust supply device that send dirt pipeline are connected, send the export of dirt pipeline to stretch into the major structure in, send the export of dirt pipeline for the flexible construction that can squint to arbitrary direction, and send the export of dirt pipeline to be equipped with magnetism and inhale the nature structure, and dispersion cloth dirt mechanism includes: the dust feeding pipeline is circumferentially arranged at the position of the dust feeding pipeline, when one of the electromagnets is electrified, the electromagnet and the magnetic attraction structural body can generate a magnetic attraction effect, and the magnetic attraction structural body drives the outlet of the dust feeding pipeline to be close to the electrified electromagnet. The invention relates to a control system of an electromagnetic oscillation dust distribution device capable of realizing dust distribution for testing online sampling equipment. In addition, the invention also discloses a testing device with the electromagnetic oscillation distributed dust control system.
Description
Technical Field
The invention relates to the technical field of testing of online environment air sampling equipment, in particular to a control system of an electromagnetic oscillation dust distribution device and a testing device with the electromagnetic oscillation dust distribution control system, wherein the control system can be used for testing the online environment air sampling equipment.
Background
Aiming at an atmospheric sampling device, in particular to an online environment atmospheric particulate monitoring device, the existing test verification mode is to place the device in an actual atmospheric environment and select a proper time period to carry out long-period test. The testing method has the advantages of long testing period, high testing cost and poor reproducibility, and is not beneficial to technical improvement and rapid industry development.
The applicant filed an application on 24/5/2019 with the publication numbers: 110082270A, application number: 201910439212.2, the name is: a multifunctional linked temperature, pressure and humidity equalizing dual-mode gaseous environment simulation system capable of adding dust, which is disclosed in the accompanying drawings 1-4 and the description thereof, particularly the detailed implementation modes [0035] - [0054], particularly the detailed implementation modes [0039], [0048], [0049], wherein the detailed implementation modes [0039 ]: the invention tests equipment with larger volume, comprising: two important parts of cutting head and host computer, when needing to test whole atmospheric particulates sampling equipment, can place cutting head and host computer at second box 21 and first box 11 respectively, and pass the sampling passageway between cutting head and the host computer interface channel 3 has so realized testing on the whole to atmospheric particulates sampling equipment. … … [0048 ]: a dust insulation device is arranged at the communication position of the second box bodies 21 and the second circulation pipeline 232, and after the second temperature and humidity atmosphere in the second box bodies 21 is subjected to dust insulation and filtration through the dust insulation device, the second temperature and humidity atmosphere is circulated through the second circulation pipeline 232. Through setting up it is a plurality of to prevent the dust device that ends dirt between the second box 11, simultaneously, through setting up the dust device ends dirt can realize simulating various temperature and humidity pressure environment fast in the laboratory, lets atmospheric particulates sampling equipment can be at the test performance that ends dirt of various temperature and humidity pressure environment.
It should be noted that a dust insulation device is disposed at a communication position between the first tank 11 and the first circulation pipe 132, and a dust insulation device is disposed at a communication position between the second tank 21 and the second circulation pipe 232. Under the condition, the atmospheric particulate sampling equipment can be tested under the completely dust-free condition to meet the test standard, in addition, the test under the dust-free condition belongs to a test of a specific situation, under the condition that no particulate matters are added, no matter what state the first temperature-humidity-pressure atmosphere and the second temperature-humidity-pressure atmosphere are, the particulate matter data measured by the atmospheric particulate sampling equipment should be 0, the measurement deviation must be in a proper error range, otherwise, the test of the atmospheric particulate sampling equipment is not accurate.
In the patent application of the invention of the applicant, a clear technical scheme is disclosed, and the temperature and humidity atmosphere inside the first box body 11 and the second box body 12 can be independently controlled, so that the volume of a test space can be greatly reduced, the pressure-bearing condition of a test can be ensured, the multifunctional linked temperature, pressure and humidity equalizing and heating dual-mode dust gaseous environment simulation system is convenient to produce, manufacture, transport and store, and the manufacturing and using cost is reduced as much as possible.
The applicant's patent can well test the accuracy of the atmospheric sampling device in various wet and warm pressure environments in a dust-proof state, that is, the measured particulate data of the atmospheric particulate sampling device should be 0, and the measurement deviation must be within a proper error range, however, the accuracy test in a dust-added state in the world still is in a groping stage at present, and a better solution is not found.
In the prior art, two difficulties are existed in dispersing and distributing dust of an atmospheric particulate sampling device, namely how to accurately add dust and how to distribute dust. The two difficulties are the technological gaps in the current technical field. The publication number is: 110082270A, application number: 201910439212.2, the name is: the patent application of the multifunctional linked temperature-equalizing, pressure-equalizing and humidity-equalizing dust-adding dual-mode gaseous environment simulation system is characterized in that the dual-mode gaseous environment simulation system is adopted, a cutting head and a host of an atmosphere sampling device are separately tested, a sampling channel is contained in a connecting channel, and sealing structures are arranged in gaps between two ends of the sampling channel and the connecting channel. Therefore, when the dust is required to be added to the atmosphere sampling device, the dust can be directly added to the main machine of the atmosphere sampling device only by opening the connecting channel, but the technical blank of no-one research still remains on how to accurately add the dust and how to distribute the dust when adding the dust.
Therefore, there is a need for a control system of an electromagnetic oscillation dust distribution device and a testing device with the electromagnetic oscillation dust distribution control system, which can be implemented for testing an online sampling device.
Disclosure of Invention
The invention aims to provide a control system of an electromagnetic oscillation dust distribution device capable of distributing dust for testing an online sampling device.
In order to achieve the purpose, the technical scheme provided by the invention is as follows: the control system of the electromagnetic oscillation dust distribution device is provided, and is used for being connected to a host machine of the atmospheric sampling equipment when the atmospheric sampling equipment is tested, and uniformly providing a fluid containing particulate matters for the test to the host machine of the atmospheric sampling equipment, and comprises the following components:
the main body structure is a hollow structure and is connected to a host of the atmosphere sampling equipment;
the inlet of the dust feeding pipeline is connected with an external dust supply device, the outlet of the dust feeding pipeline extends into the main runner of the main structure, the outlet of the dust feeding pipeline is of a flexible structure capable of deviating in any direction in the main runner of the main structure, and the outlet of the dust feeding pipeline is provided with a magnetic attraction structure;
dispersion cloth dirt mechanism, dispersion cloth dirt mechanism includes: the electromagnets are circumferentially arranged on the outer side or the inner side of the dust conveying pipeline, when one of the electromagnets is electrified, the electromagnet and the magnetic attraction structural body generate a magnetic attraction effect, and the magnetic attraction structural body drives the outlet of the dust conveying pipeline to be close to the electrified electromagnet;
the dust conveying pipeline is characterized by further comprising a control unit and a plurality of driving units, the driving units and the electromagnets are in one-to-one correspondence to form a plurality of groups of electromagnet modules, the control unit can selectively control any one group of electromagnet modules, the electromagnet modules controlled by the control unit drive the electromagnets to be electrified, the electrified electromagnets and the magnetic attraction structural bodies generate magnetic attraction, and the dust conveying pipeline is adsorbed to move towards the direction of the electrified electromagnets.
The control unit can selectively control any one group of the electromagnet modules, and in the electromagnet modules controlled by the control unit, the control unit controls the driving unit to drive the electromagnet to be electrified, specifically:
the control unit comprises a plurality of control signal output ports, the control unit selects one of the control signal output ports to send PWM square waves to control the electromagnet module, and in the electromagnet module controlled by the control unit, the control unit controls the voltage and time for driving the electromagnet to be electrified by the driving unit through the PWM square waves.
The part of the dust conveying pipeline, which is positioned in the main body structure, is also suspended on the inner wall of the dust conveying pipeline through a bracket.
The part of the dust sending pipeline connected with the bracket is provided with a lantern ring, and the dust sending pipeline penetrates through the lantern ring and is connected with the bracket through the lantern ring.
The magnetic attraction structure body is coated outside the dust conveying pipeline.
The outlet of the dust conveying pipeline is designed to be of an inverted trapezoidal structure.
In order to achieve the above object, the present invention further provides a testing apparatus with an electromagnetic oscillation dust distribution control system.
The device is used for testing the atmospheric sampling equipment, is connected to a host machine of the atmospheric sampling equipment, and accurately and uniformly provides a fluid containing particulate matters for testing to the host machine of the atmospheric sampling equipment, and comprises:
a dust supply device for providing a precise weight of a particulate matter-containing fluid for testing;
a distributed dust device connected to the dust supply device, comprising:
the main body structure is a hollow structure and is connected to a host of the atmosphere sampling equipment;
the inlet of the dust feeding pipeline is connected with an external dust supply device, the outlet of the dust feeding pipeline extends into the main runner of the main structure, the outlet of the dust feeding pipeline is of a flexible structure capable of deviating in any direction in the main runner of the main structure, and the outlet of the dust feeding pipeline is provided with a magnetic attraction structure;
dispersion cloth dirt mechanism, dispersion cloth dirt mechanism includes: the electromagnets are circumferentially arranged on the outer side or the inner side of the dust conveying pipeline, when one of the electromagnets is electrified, the electromagnet and the magnetic attraction structural body generate a magnetic attraction effect, and the magnetic attraction structural body drives the outlet of the dust conveying pipeline to be close to the electrified electromagnet;
the dust conveying pipeline is characterized by further comprising a control unit and a plurality of driving units, the driving units and the electromagnets are in one-to-one correspondence to form a plurality of groups of electromagnet modules, the control unit can selectively control any one group of electromagnet modules, the electromagnet modules controlled by the control unit drive the electromagnets to be electrified, the electrified electromagnets and the magnetic attraction structural bodies generate magnetic attraction, and the dust conveying pipeline is adsorbed to move towards the direction of the electrified electromagnets.
The control unit can selectively control any one group of the electromagnet modules, and in the electromagnet modules controlled by the control unit, the control unit controls the driving unit to drive the electromagnet to be electrified, specifically:
the control unit comprises a plurality of control signal output ports, the control unit selects one of the control signal output ports to send PWM square waves to control the electromagnet module, and in the electromagnet module controlled by the control unit, the control unit controls the voltage and time for driving the electromagnet to be electrified by the driving unit through the PWM square waves.
The part of the dust conveying pipeline, which is positioned in the main body structure, is also suspended on the inner wall of the dust conveying pipeline through a bracket.
The part of the dust sending pipeline connected with the bracket is provided with a lantern ring, and the dust sending pipeline penetrates through the lantern ring and is connected with the bracket through the lantern ring.
The magnetic attraction structure body is coated outside the dust conveying pipeline.
The outlet of the dust conveying pipeline is designed to be of an inverted trapezoidal structure.
Compared with the prior art, the dispersing and dust distributing device for the atmosphere sampling equipment comprises: the main body structure is a hollow structure and is connected to a host of the atmosphere sampling equipment; the dust feeding pipeline is characterized in that an inlet of the dust feeding pipeline is connected with an external dust supply device, an outlet of the dust feeding pipeline extends into the main body structure, an outlet of the dust feeding pipeline is of a flexible structure capable of deviating to any direction, and a magnetic attraction structure body is arranged at the outlet of the dust feeding pipeline; dispersion cloth dirt mechanism, dispersion cloth dirt mechanism includes: the electromagnet bodies are circumferentially arranged on the outer side or the inner side of the dust conveying pipeline, when one of the electromagnet bodies is electrified, the electromagnet bodies and the magnetic attraction structural body generate a magnetic attraction effect, and the magnetic attraction structural body drives the outlet of the dust conveying pipeline to be close to the electrified electromagnet body.
The host machine capable of uniformly conveying the fluid containing the particulate matters for testing to the atmospheric particulate matter sampling equipment through the dust dispersing and distributing mechanism is a precondition for testing the atmospheric particulate matter sampling equipment.
The invention will become more apparent from the following description when taken in conjunction with the accompanying drawings, which illustrate embodiments of the invention.
Drawings
FIG. 1 is a schematic diagram of one embodiment of an electromagnetically oscillating dust dispersing apparatus.
Figure 2 is a schematic view of the electro-magnetically oscillating dust dispersing apparatus of figure 1 in connection with an atmospheric sampling device.
Fig. 3 is a schematic block circuit diagram of a control system of the electromagnetically oscillating dust dispersing apparatus.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
Referring to the embodiment shown in fig. 1, a control system 100 of an electromagnetic oscillation dust distribution device is provided, which is connected to a main body of an atmospheric sampling apparatus 50 when the atmospheric sampling apparatus 50 is tested, and uniformly supplies a test fluid containing particulate matter to the main body of the atmospheric sampling apparatus 50. The atmospheric sampling device 50, especially an online atmospheric sampling device, needs to be tested before shipment and periodically during service in order to ensure the accuracy of the test data output by the sampling device and prevent the data of the sampling device from being falsified.
Taking an online atmospheric sampling device as an example, an atmospheric particulate enrichment module is generally disposed inside the device, and specifically, the atmospheric particulate enrichment module is generally a paper filter membrane (hereinafter, the paper filter membrane is exemplarily described). The environment air is sucked into the cutter by the constant current of the sampling pump and is cut into particles meeting the technical requirements, the particles in the environment air are finally enriched on the paper filter membrane through the sampling channel, the existing technology is that the particles enriched on the paper filter membrane are irradiated by beta rays, the strength of the beta rays can be attenuated at the moment, and the weight of the particles can be calculated by measuring the beta rays.
The particulate cutter is accurate given that it has been precisely calibrated before shipment (calibration of the particulate cutter is not within the scope of the present invention's solution). Therefore, when the atmospheric sampling equipment is tested, only the host of the atmospheric sampling equipment needs to be tested. Before leaving a factory or in the using process of the atmospheric particulate sampling equipment, the reliability, stability and accuracy of the work of the atmospheric particulate sampling equipment need to be tested, and the atmospheric particulate sampling equipment can be placed in a place with the publication number as described in the background technology: 110082270A, application number: 201910439212.2, the name is: the multifunctional linked temperature-equalizing, pressure-equalizing, humidity-equalizing and dust-adding dual-mode gaseous environment simulation system is used for testing.
When a host of the atmospheric sampling device performs a test, the current technology generally adjusts the temperature and humidity pressure parameters of the environment where the atmospheric particulate sampling device is located, and in a state of 0 plus dust (i.e. no particulate is added), the weight of the atmospheric particulate matter enriched on the paper filter membrane detected by beta rays is about 0, and the difference is within an error allowable range, so as to test the accuracy of the sampling device. This test is not perfect and has drawbacks. Therefore, in order to compensate for the defects, in the testing process, the particulate matters meeting the technical requirements and having a known weight of M0 are put into the sampling channel, under the action of the sampling pump, the particulate matters are enriched on the paper filter membrane through the sampling channel, the particulate matters enriched on the paper filter membrane are irradiated by beta rays, the intensity of the beta rays is attenuated, the weight of the particulate matters is calculated through the measurement of the beta rays, M1 is calculated, and the difference between M0 and M1 is compared, so that whether the accuracy of the equipment sampled by the atmosphere meets the requirements or not can be determined. Multiple measurements can be made to improve the accuracy of the test. Above-mentioned technical scheme, the manual work is put in the particulate matter that accords with technical requirement of known weight M0, then can meet a great problem so, is the particulate matter and can not be put in the paper filter membrane uniformly, consequently, how to realize throwing in the particulate matter on the paper filter membrane uniformly, becomes the essential important link of test atmosphere sampling equipment, need distribute the dust distribution to the atmospheric particulates through a branch promptly.
Referring to fig. 1 and 2, a control system 100 for an electromagnetically oscillating dust dispersing apparatus includes:
the main body structure 1 is a hollow structure, and the main body structure 1 is connected to a main machine of the atmosphere sampling device 50; specifically, the main body structure 1 is a tubular structure, which can be hermetically connected to the upper end (sampling channel) of the sampling channel of the main body of the atmosphere sampling apparatus 50, and can uniformly supply dust to the main body of the atmosphere sampling apparatus 50 instead of a particulate matter cutter. In this context, "dust" means particulate matter, and is supplied in the form of a particulate matter-containing fluid.
In a preferred embodiment, the body structure 1 has an outer shape conforming to the size of the sampling channel of the main body of the atmospheric sampling device 50, and preferably is threadably connectable to the sampling channel to provide a tight and smooth transition to the sampling channel, without creating additional resistance to the flow of the particulate matter-containing fluid.
The dust feeding device comprises a dust feeding pipeline 3, wherein an inlet of the dust feeding pipeline 3 is connected with an external dust supply device, an outlet of the dust feeding pipeline 3 extends into a main flow channel of the main structure 1, an outlet of the dust feeding pipeline 3 is of a flexible structure capable of deviating in any direction in the main flow channel of the main structure, and a magnetic attraction structure body 31 is arranged at the outlet of the dust feeding pipeline 3; referring to fig. 1, the dust feeding pipe 3 is of a flexible structure in the main structure 1. This has the advantage that the dust supply duct 3 can be easily inserted into the main body structure 1 from the outside of the main body structure 1 or extracted from the inside of the main body structure 1. Namely, each time the test is carried out, the dust conveying pipeline 3 without pollution can be replaced, the outlet of the dust conveying pipeline 3 can deviate to any direction, and the cross pollution caused by multiple times of measurement can be prevented.
Dispersion cloth dirt mechanism 2, dispersion cloth dirt mechanism 2 includes: the electromagnets 21 are circumferentially arranged on the outer side or the inner side of the dust conveying pipeline 3, when one of the electromagnets 21 is powered on, the electromagnet 21 and the magnetic attraction structural body 31 can generate a magnetic attraction effect, and the magnetic attraction structural body 31 drives the outlet of the dust conveying pipeline 3 to be close to the powered electromagnet 21.
Referring to fig. 3, the dust collecting device further includes a control unit 20 and a plurality of driving units 24, the plurality of driving units 24 and the plurality of electromagnets 21 form a plurality of groups of electromagnet modules 25 in a one-to-one correspondence manner, the control unit 20 can selectively control any one group of electromagnet modules 25, in the electromagnet modules 25 controlled by the control unit 20, the control unit 20 controls the driving unit 24 to drive the electromagnets 21 to be powered on, the powered-on electromagnets 21 and the magnetic attraction structural body 31 generate a magnetic attraction effect, and the dust collecting pipeline 3 is attracted to move towards the direction of the powered-on electromagnets 21.
The control unit 20 can selectively control any one group of the electromagnet modules 25, and in the electromagnet modules 25 controlled by the control unit 20, the control unit 20 controls the driving unit 24 to drive the electromagnet 21 to be powered on, specifically:
the control unit 20 includes a plurality of control signal output ports, for example, a single chip microcomputer has a plurality of control signal output ports, the control unit 20 controls the electromagnet module 25 by selecting one of the control signal output ports to send a PWM square wave, and in the electromagnet module 25 controlled by the control unit 20, the control unit 20 controls the voltage and time for the driving unit 24 to drive the electromagnet 21 to be powered on through the PWM square wave.
The magnetically attractable structure 31 may be a common magnetically attractable metal such as iron, nickel, etc., or may be an electromagnet.
In one embodiment, referring to fig. 1, the plurality of electromagnets 21 are circumferentially arranged at the outer wall of the body structure 1.
Referring to fig. 1 and 2, the inlet of the dust feeding pipe 3 is connected to an external dust supplying device 200, and the outlet of the dust feeding pipe 3 extends into the main structure 1. It should be noted that, as described above, the external dust supply device 200 is used for feeding the particulate matters meeting the technical requirements of the known weight M0 to the sampling channel, and under the action of the sampling pump, the particulate matters are enriched onto the paper filter membrane through the sampling channel, and if the control system 100 of the electromagnetic oscillation dust distribution device of the present invention is not additionally installed, the added particulate matters cannot be guaranteed to be uniformly enriched onto the paper filter membrane, and may be locally enriched on the paper filter membrane in a large amount, and the particulate matters are unevenly distributed on the paper filter membrane, so that on one hand, the device is not beneficial to the smooth operation of the sampling pump, the working resistance of the sampling pump is greatly increased, and in addition, when the weight of the particulate matters is measured through the beta ray, the accuracy of the measurement is greatly reduced. Therefore, the dust dispersing and distributing mechanism 2 is arranged, so that the particulate matters sent out by the dust sending pipeline 3 can be uniformly enriched on the paper filter membrane to the maximum extent, and the weight of the particulate matters can be accurately measured by beta rays.
When the dust dispersing and distributing mechanism 2 works, the plurality of electromagnets 21 can be controlled according to a set program, and the strength of the magnetic force generated by each electromagnet 21 can also be controlled by adjusting the voltage or current loaded on the electromagnet 21, so that the dust conveying pipeline 3 can be deviated to each electrified electromagnet 21 according to a predetermined program in the dust conveying process by controlling the plurality of electromagnets 21 to work according to a set program sequence, and each electromagnet 21 is electrified in turn, so that the outlet of the dust conveying pipeline 3 is shaken towards the direction in which each electrified electromagnet 21 approaches in the dust conveying process, and the fluid containing the particulate matters for the test from the outlet of the dust conveying pipeline 3 is uniformly enriched on the paper filter membrane.
Referring to fig. 1, the portion of the dust feeding pipe 3 located inside the main body structure 1 is also suspended at the inner wall of the dust feeding pipe 3 by a bracket 22. In the process that the outlet of the dust feeding pipeline 3 shakes towards all directions in the main body structure 1, the connection stability of the inlet part of the dust feeding pipeline 3 is not affected.
Referring to fig. 1, a portion of the dust feeding pipe 3 connected to the bracket 22 is provided with a collar 23, and the dust feeding pipe 3 passes through the collar 23 and is connected to the bracket 22 through the collar 23. Specifically, the support 22 and the collar 23 are both made of metal and welded together, the collar 23 is disposed at the center inside the main body structure 1, the dust sending pipeline 3 penetrates through the inner ring of the collar 23, the support 22 is divided into two sections, and two sides of the collar 23 are respectively welded to the two sections of the support 22. The collar 23 is provided to ensure that when the outlet of the dust supply pipe 3 is swung in all directions inside the main body structure 1, the other parts of the dust supply pipe 3 are kept stable and not affected.
Referring to fig. 1, the magnetic attraction structure 31 is coated outside the dust sending pipe 3. The magnetic attraction structural body 31 is arranged to be a tubular structure, is connected below the lantern ring 23, and is arranged to be a tubular structure, so that the dust conveying pipeline 3 can pass through the magnetic attraction structural body 31, when the electromagnet 21 works, the electromagnetic force applied to the magnetic attraction structural body 31 is as uniform as possible, and the outlet of the dust conveying pipeline 3 moves according to a preset track.
Referring to fig. 1, the outlet of the dust feeding pipe 3 is designed to be an inverted trapezoid structure.
Referring to fig. 1, an inverted trapezoid structure is provided, so that the pressure of the fluid containing the particles for testing, which is conveyed out from the dust conveying pipeline 3, is reduced at the outlet due to the increase of the volume, and it is desired to reduce the downward movement speed of the particles, so that the particles are more easily and uniformly distributed on the paper filter membrane under the action of the dust dispersing and distributing mechanism 2.
In one embodiment, referring to fig. 1 and 2, the present invention further provides an atmospheric sampling device testing apparatus for testing an atmospheric sampling device, which is connected to a host of the atmospheric sampling device, and accurately and uniformly supplies a fluid containing particulate matter for testing to the host of the atmospheric sampling device.
The invention also provides a testing device with the electromagnetic oscillation distributed dust control system. When the device is used for testing the atmospheric sampling device 50, the device is connected to a host of the atmospheric sampling device 50, and the fluid containing the particulate matters for testing is uniformly supplied to the host of the atmospheric sampling device 50. The atmospheric sampling device 50, especially an online atmospheric sampling device, needs to be tested before shipment and periodically during service in order to ensure the accuracy of the test data output by the sampling device and prevent the data of the sampling device from being falsified.
Taking an online atmospheric sampling device as an example, an atmospheric particulate enrichment module is disposed inside the device, and specifically, the atmospheric particulate enrichment module is usually a paper filter membrane (hereinafter, the paper filter membrane is exemplarily described). The environment air is sucked into the cutter by the constant current of the sampling pump and is cut into particles meeting the technical requirements, the particles in the environment air are finally enriched on the paper filter membrane through the sampling channel, the existing technology is that the particles enriched on the paper filter membrane are irradiated by beta rays, the strength of the beta rays can be attenuated at the moment, and the weight of the particles can be calculated by measuring the beta rays.
The particulate cutter is accurate given that it has been precisely calibrated before shipment (calibration of the particulate cutter is not within the scope of the present invention's solution). Therefore, when the atmospheric sampling equipment is tested, only the host of the atmospheric sampling equipment needs to be tested. Before leaving a factory or in the using process of the atmospheric particulate sampling equipment, the reliability, stability and accuracy of the work of the atmospheric particulate sampling equipment need to be tested, and the atmospheric particulate sampling equipment can be placed in a place with the publication number as described in the background technology: 110082270A, application number: 201910439212.2, the name is: the multifunctional linked temperature-equalizing, pressure-equalizing, humidity-equalizing and dust-adding dual-mode gaseous environment simulation system is used for testing.
When a host of the atmospheric sampling device performs a test, the current technology generally adjusts the temperature and humidity pressure parameters of the environment where the atmospheric particulate sampling device is located, and in a state of 0 plus dust (i.e. no particulate is added), the weight of the atmospheric particulate matter enriched on the paper filter membrane detected by beta rays is about 0, and the difference is within an error allowable range, so as to test the accuracy of the sampling device. This test is not perfect and has drawbacks. Therefore, in order to compensate for the defects, in the testing process, the particulate matters meeting the technical requirements and having a known weight of M0 are put into the sampling channel, under the action of the sampling pump, the particulate matters are enriched on the paper filter membrane through the sampling channel, the particulate matters enriched on the paper filter membrane are irradiated by beta rays, the intensity of the beta rays is attenuated, the weight of the particulate matters is calculated through the measurement of the beta rays, M1 is calculated, and the difference between M0 and M1 is compared, so that whether the accuracy of the equipment sampled by the atmosphere meets the requirements or not can be determined. Above-mentioned technical scheme, the manual work is put in the particulate matter that accords with technical requirement of known weight M0, then can meet a great problem so, is the particulate matter and can not be put in the paper filter membrane uniformly, consequently, how to realize throwing in the particulate matter on the paper filter membrane uniformly, becomes the essential important link of test atmosphere sampling equipment, need distribute the dust distribution to the atmospheric particulates through a branch promptly.
The invention also provides a testing device of the atmospheric sampling equipment, which comprises:
a dust supply 200 for providing a precise weight of particulate matter-containing fluid for testing;
a dust distributing device 100, wherein the dust distributing device 100 is connected with the dust supplying device 200, in particular to the dust conveying pipeline 3.
Specifically, the method comprises the following steps as shown in fig. 1 and 2:
the main body structure 1 is a hollow structure, and the main body structure 1 is connected to a main machine of the atmosphere sampling device 50; specifically, the main body structure 1 is a tubular structure, which can be hermetically connected to the upper end (sampling channel) of the sampling channel of the main body of the atmosphere sampling apparatus 50, and can uniformly supply dust to the main body of the atmosphere sampling apparatus 50 instead of a particulate matter cutter. In this context, "dust" means particulate matter, and is supplied in the form of a particulate matter-containing fluid.
In a preferred embodiment, the body structure 1 has an outer shape conforming to the size of the sampling channel of the main body of the atmospheric sampling device 50, and preferably is threadably connectable to the sampling channel to provide a sealed and smooth transition connection with the sampling channel, so as not to provide additional resistance to the flow of the fluid containing particulate matter.
The dust feeding device comprises a dust feeding pipeline 3, wherein an inlet of the dust feeding pipeline 3 is connected with an external dust supply device, an outlet of the dust feeding pipeline 3 extends into a main flow channel of the main structure 1, an outlet of the dust feeding pipeline 3 is of a flexible structure capable of deviating in any direction in the main flow channel of the main structure, and a magnetic attraction structure body 31 is arranged at the outlet of the dust feeding pipeline 3; referring to fig. 1, the dust feeding pipe 3 is of a flexible structure in the main structure 1. This has the advantage that the dust supply duct 3 can be easily inserted into the main body structure 1 from the outside of the main body structure 1 or extracted from the inside of the main body structure 1. Namely, each time the test is carried out, the dust conveying pipeline 3 without pollution can be replaced, the outlet of the dust conveying pipeline 3 can deviate to any direction, and the cross pollution caused by multiple times of measurement can be prevented.
Dispersion cloth dirt mechanism 2, dispersion cloth dirt mechanism 2 includes: the electromagnets 21 are circumferentially arranged on the outer side or the inner side of the dust conveying pipeline 3, when one of the electromagnets 21 is powered on, the electromagnet 21 and the magnetic attraction structural body 31 can generate a magnetic attraction effect, and the magnetic attraction structural body 31 drives the outlet of the dust conveying pipeline 3 to be close to the powered electromagnet 21.
Referring to fig. 3, the dust collecting device further includes a control unit 20 and a plurality of driving units 24, the plurality of driving units 24 and the plurality of electromagnets 21 form a plurality of groups of electromagnet modules 25 in a one-to-one correspondence manner, the control unit 20 can selectively control any one group of electromagnet modules 25, in the electromagnet modules 25 controlled by the control unit 20, the control unit 20 controls the driving unit 24 to drive the electromagnets 21 to be powered on, the powered-on electromagnets 21 and the magnetic attraction structural body 31 generate a magnetic attraction effect, and the dust collecting pipeline 3 is attracted to move towards the direction of the powered-on electromagnets 21.
The control unit 20 can selectively control any one group of the electromagnet modules 25, and in the electromagnet modules 25 controlled by the control unit 20, the control unit 20 controls the driving unit 24 to drive the electromagnet 21 to be powered on, specifically:
the control unit 20 includes a plurality of control signal output ports, for example, a single chip microcomputer has a plurality of control signal output ports, the control unit 20 controls the electromagnet module 25 by selecting one of the control signal output ports to send a PWM square wave, and in the electromagnet module 25 controlled by the control unit 20, the control unit 20 controls the voltage and time for the driving unit 24 to drive the electromagnet 21 to be powered on through the PWM square wave.
The magnetically attractable structure 31 may be a common magnetically attractable metal such as iron, nickel, etc., or may be an electromagnet.
In one embodiment, referring to fig. 1, the plurality of electromagnets 21 are circumferentially arranged at the outer wall of the body structure 1.
Referring to fig. 1 and 2, the inlet of the dust feeding pipe 3 is connected to an external dust supplying device 200, and the outlet of the dust feeding pipe 3 extends into the main structure 1. It should be noted that, as described above, the external dust supply device 200 is used for feeding the particulate matters meeting the technical requirements of the known weight M0 to the sampling channel, and under the action of the sampling pump, the particulate matters are enriched onto the paper filter membrane through the sampling channel, and if the control system 100 of the electromagnetic oscillation dust distribution device of the present invention is not additionally installed, the added particulate matters cannot be guaranteed to be uniformly enriched onto the paper filter membrane, and may be locally enriched on the paper filter membrane in a large amount, and the particulate matters are unevenly distributed on the paper filter membrane, so that on one hand, the device is not beneficial to the smooth operation of the sampling pump, the working resistance of the sampling pump is greatly increased, and in addition, when the weight of the particulate matters is measured through the beta ray, the accuracy of the measurement is greatly reduced. Therefore, the dust dispersing and distributing mechanism 2 is arranged, so that the particulate matters sent out by the dust sending pipeline 3 can be uniformly enriched on the paper filter membrane to the maximum extent, and the weight of the particulate matters can be accurately measured by beta rays.
When the dust dispersing and distributing mechanism 2 works, the plurality of electromagnets 21 can be controlled according to a set program, and the strength of the magnetic force generated by each electromagnet 21 can also be controlled by adjusting the voltage or current loaded on the electromagnet 21, so that the dust conveying pipeline 3 can be deviated to each electrified electromagnet 21 according to a predetermined program in the dust conveying process by controlling the plurality of electromagnets 21 to work according to a set program sequence, and each electromagnet 21 is electrified in turn, so that the outlet of the dust conveying pipeline 3 is shaken towards the direction in which each electrified electromagnet 21 approaches in the dust conveying process, and the fluid containing the particulate matters for test coming out of the outlet of the dust conveying pipeline 3 is uniformly enriched on the paper filter membrane.
Referring to fig. 1, the portion of the dust feeding pipe 3 located inside the main body structure 1 is also suspended at the inner wall of the dust feeding pipe 3 by a bracket 22. In the process that the outlet of the dust feeding pipeline 3 shakes towards all directions in the main body structure 1, the connection stability of the inlet part of the dust feeding pipeline 3 is not affected.
Referring to fig. 1, a portion of the dust feeding pipe 3 connected to the bracket 22 is provided with a collar 23, and the dust feeding pipe 3 passes through the collar 23 and is connected to the bracket 22 through the collar 23. Specifically, the support 22 and the collar 23 are both made of metal and welded together, the collar 23 is disposed at the center inside the main body structure 1, the dust sending pipeline 3 penetrates through the inner ring of the collar 23, the support 22 is divided into two sections, and two sides of the collar 23 are respectively welded to the two sections of the support 22. The collar 23 is provided to ensure that when the outlet of the dust supply pipe 3 is swung in all directions inside the main body structure 1, the other parts of the dust supply pipe 3 are kept stable and not affected.
Referring to fig. 1, the magnetic attraction structure 31 is coated outside the dust sending pipe 3. The magnetic attraction structural body 31 is arranged to be a tubular structure, is connected below the lantern ring 23, and is arranged to be a tubular structure, so that the dust conveying pipeline 3 can pass through the magnetic attraction structural body 31, when the electromagnet 21 works, the electromagnetic force applied to the magnetic attraction structural body 31 is as uniform as possible, and the outlet of the dust conveying pipeline 3 moves according to a preset track.
Referring to fig. 1, the outlet of the dust feeding pipe 3 is designed to be an inverted trapezoid structure.
Referring to fig. 1, an inverted trapezoid structure is provided, so that the pressure of the fluid containing the particles for testing, which is conveyed out from the dust conveying pipeline 3, is reduced at the outlet due to the increase of the volume, and the downward movement speed of the particles is expected to be reduced, so that the particles are more easily and uniformly distributed on the paper filter membrane under the action of the uniform mechanism 2.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (12)
1. A control system of an electromagnetic oscillation dust distribution device, which is used for being connected to a host machine of an atmosphere sampling device when the atmosphere sampling device is tested, and uniformly providing a fluid containing particulate matters for the test to the host machine of the atmosphere sampling device, comprises:
the main body structure is a hollow structure and is connected to a host of the atmosphere sampling equipment;
the inlet of the dust feeding pipeline is connected with an external dust supply device, the outlet of the dust feeding pipeline extends into the main runner of the main structure, the outlet of the dust feeding pipeline is of a flexible structure capable of deviating in any direction in the main runner of the main structure, and the outlet of the dust feeding pipeline is provided with a magnetic attraction structure;
dispersion cloth dirt mechanism, dispersion cloth dirt mechanism includes: the electromagnets are circumferentially arranged on the outer side or the inner side of the dust conveying pipeline, when one of the electromagnets is electrified, the electromagnet and the magnetic attraction structural body generate a magnetic attraction effect, and the magnetic attraction structural body drives the outlet of the dust conveying pipeline to be close to the electrified electromagnet;
it is characterized in that the preparation method is characterized in that,
the dust conveying pipeline is characterized by further comprising a control unit and a plurality of driving units, the driving units and the electromagnets are in one-to-one correspondence to form a plurality of groups of electromagnet modules, the control unit can selectively control any one group of electromagnet modules, the electromagnet modules controlled by the control unit drive the electromagnets to be electrified, the electrified electromagnets and the magnetic attraction structural bodies generate magnetic attraction, and the dust conveying pipeline is adsorbed to move towards the direction of the electrified electromagnets.
2. The control system for an electro-magnetically oscillating dust dispersing apparatus of claim 1,
the control unit can selectively control any one group of the electromagnet modules, and in the electromagnet modules controlled by the control unit, the control unit controls the driving unit to drive the electromagnet to be electrified, specifically:
the control unit comprises a plurality of control signal output ports, the control unit selects one of the control signal output ports to send PWM square waves to control the electromagnet module, and in the electromagnet module controlled by the control unit, the control unit controls the voltage and time for driving the electromagnet to be electrified by the driving unit through the PWM square waves.
3. The control system for an electro-magnetically oscillating dust spreading device of claim 1, wherein the portion of the dust delivery conduit within the body structure is further suspended by a bracket from an inner wall of the dust delivery conduit.
4. The control system of the electromagnetic oscillation dust distribution device as set forth in claim 3, wherein a collar is provided at a portion of the dust supply pipe connected to the bracket, the dust supply pipe passing through the collar and being connected to the bracket through the collar.
5. The control system of an electromagnetically oscillated dust dispersing device as claimed in claim 1, wherein said magnetically attractable structural body is coated outside said dust supply pipe.
6. The control system of the device for distributing dust through electromagnetic oscillation as claimed in claim 1, wherein the outlet of the dust feeding pipe is designed to have an inverted trapezoidal structure.
7. A test device with an electromagnetic oscillation distribution dust control system is used for testing an atmosphere sampling device, is connected to a host machine of the atmosphere sampling device, and accurately and uniformly provides a test fluid containing particulate matters for the host machine of the atmosphere sampling device, and comprises:
a dust supply device for providing a precise weight of a particulate matter-containing fluid for testing;
a distributed dust device connected to the dust supply device, comprising:
the main body structure is a hollow structure and is connected to a host of the atmosphere sampling equipment;
the inlet of the dust feeding pipeline is connected with an external dust supply device, the outlet of the dust feeding pipeline extends into the main runner of the main structure, the outlet of the dust feeding pipeline is of a flexible structure capable of deviating in any direction in the main runner of the main structure, and the outlet of the dust feeding pipeline is provided with a magnetic attraction structure;
dispersion cloth dirt mechanism, dispersion cloth dirt mechanism includes: the electromagnets are circumferentially arranged on the outer side or the inner side of the dust conveying pipeline, when one of the electromagnets is electrified, the electromagnet and the magnetic attraction structural body generate a magnetic attraction effect, and the magnetic attraction structural body drives the outlet of the dust conveying pipeline to be close to the electrified electromagnet;
it is characterized in that the preparation method is characterized in that,
the dust conveying pipeline is characterized by further comprising a control unit and a plurality of driving units, the driving units and the electromagnets are in one-to-one correspondence to form a plurality of groups of electromagnet modules, the control unit can selectively control any one group of electromagnet modules, the electromagnet modules controlled by the control unit drive the electromagnets to be electrified, the electrified electromagnets and the magnetic attraction structural bodies generate magnetic attraction, and the dust conveying pipeline is adsorbed to move towards the direction of the electrified electromagnets.
8. The test apparatus with an electromagnetically oscillated dispersive dust control system as claimed in claim 7,
the control unit can selectively control any one group of the electromagnet modules, and in the electromagnet modules controlled by the control unit, the control unit controls the driving unit to drive the electromagnet to be electrified, specifically:
the control unit comprises a plurality of control signal output ports, the control unit selects one of the control signal output ports to send PWM square waves to control the electromagnet module, and in the electromagnet module controlled by the control unit, the control unit controls the voltage and time for driving the electromagnet to be electrified by the driving unit through the PWM square waves.
9. The testing device with an electromagnetically oscillated distributed dust control system as claimed in claim 7, wherein a portion of said dust feeding pipe located in said main body structure is further suspended at an inner wall of said dust feeding pipe by a bracket.
10. The testing device with the electromagnetic oscillation dust distribution control system as claimed in claim 8, wherein a portion of the dust feeding pipe connected to the bracket is provided with a collar, and the dust feeding pipe passes through the collar and is connected to the bracket through the collar.
11. The testing device with an electromagnetically oscillating dust control system as claimed in claim 7, wherein said magnetically attractable structural body is coated outside said dust supply duct.
12. The testing apparatus with an electromagnetically oscillating dust control system as claimed in claim 7, wherein the outlet of said dust duct is designed to have an inverted trapezoidal configuration.
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