CN113008754B - Bacteria filtering efficiency detection device and detection method for mask fabric - Google Patents
Bacteria filtering efficiency detection device and detection method for mask fabric Download PDFInfo
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- CN113008754B CN113008754B CN202110174586.3A CN202110174586A CN113008754B CN 113008754 B CN113008754 B CN 113008754B CN 202110174586 A CN202110174586 A CN 202110174586A CN 113008754 B CN113008754 B CN 113008754B
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- 238000001514 detection method Methods 0.000 title claims abstract description 57
- 239000004744 fabric Substances 0.000 title claims abstract description 55
- 241000894006 Bacteria Species 0.000 title claims abstract description 18
- 238000001914 filtration Methods 0.000 title claims abstract description 18
- 238000012360 testing method Methods 0.000 claims abstract description 102
- 239000007788 liquid Substances 0.000 claims abstract description 85
- 238000005070 sampling Methods 0.000 claims abstract description 45
- 239000000443 aerosol Substances 0.000 claims abstract description 43
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 230000001580 bacterial effect Effects 0.000 claims description 45
- 238000003825 pressing Methods 0.000 claims description 41
- 239000003595 mist Substances 0.000 claims description 15
- 238000002474 experimental method Methods 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 13
- 230000002572 peristaltic effect Effects 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 210000001503 joint Anatomy 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 6
- 210000004907 gland Anatomy 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 4
- 241000233866 Fungi Species 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000008676 import Effects 0.000 claims 3
- 239000010410 layer Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 10
- 239000007789 gas Substances 0.000 description 9
- 239000012945 sealing adhesive Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000035939 shock Effects 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 241000191967 Staphylococcus aureus Species 0.000 description 2
- 241001052560 Thallis Species 0.000 description 2
- 239000002775 capsule Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J21/00—Chambers provided with manipulation devices
- B25J21/02—Glove-boxes, i.e. chambers in which manipulations are performed by the human hands in gloves built into the chamber walls; Gloves therefor
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/02—Form or structure of the vessel
- C12M23/08—Flask, bottle or test tube
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/22—Transparent or translucent parts
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M27/00—Means for mixing, agitating or circulating fluids in the vessel
- C12M27/16—Vibrating; Shaking; Tilting
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M33/00—Means for introduction, transport, positioning, extraction, harvesting, peeling or sampling of biological material in or from the apparatus
- C12M33/04—Means for introduction, transport, positioning, extraction, harvesting, peeling or sampling of biological material in or from the apparatus by injection or suction, e.g. using pipettes, syringes, needles
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M37/00—Means for sterilizing, maintaining sterile conditions or avoiding chemical or biological contamination
- C12M37/04—Seals
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
- C12M41/30—Means for regulation, monitoring, measurement or control, e.g. flow regulation of concentration
- C12M41/36—Means for regulation, monitoring, measurement or control, e.g. flow regulation of concentration of biomass, e.g. colony counters or by turbidity measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/084—Testing filters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The invention discloses a bacteria filtering efficiency detection device of a mask fabric, which comprises a detection cabinet and an aerosol pipe, wherein a negative pressure test cavity is arranged in the detection cabinet, a sealing movable door is arranged on the detection cabinet, the sealing movable door can seal the negative pressure test cavity, the aerosol pipe is fixed in the middle of the negative pressure test cavity, a fog liquid generating device is connected to a pipeline at the upper end of the aerosol pipe, and two sets of sampling detection devices are connected to a pipeline at the lower end of the aerosol pipe.
Description
Technical Field
The invention relates to the technical field of quality inspection devices of mask fabrics, in particular to a device and a method for detecting bacterial filtration efficiency of mask fabrics.
Background
The mask is a common air filtering appliance, the main performance index is the filtering efficiency of bacteria, the staphylococcus aureus method is generally adopted for testing the index, the mask fabric is arranged on a testing device in the detection process, the gas containing thalli is introduced, after the mask fabric is filtered, a part of thalli remains in the testing device, the filtering efficiency of the mask fabric is determined through the culture technology and colony data acquisition, the staphylococcus aureus is used in the detection process, the detection personnel need to wear protective equipment for operation, the experiment process is time-consuming and labor-consuming, a certain danger exists, the common sampling testing device is separated into a multi-layer culture structure, the disassembly and the assembly of the testing device are required to be integrally carried out, a certain culture layer cannot be independently extracted for culture and data acquisition, and the disassembly, the assembly and the cleaning are very inconvenient.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a device and a method for detecting bacterial filtration efficiency of a mask fabric.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a bacteria filtration efficiency detection device of gauze mask surface fabric, includes detection cabinet, aerial fog pipe, be equipped with negative pressure test chamber in the detection cabinet, install sealed dodge gate on the detection cabinet, sealed dodge gate can airtight negative pressure test chamber, aerial fog pipe is fixed at negative pressure test chamber middle part, aerial fog pipe upper end pipe connection has fog liquid generating device, aerial fog pipe lower extreme pipe connection has two sets of sampling detection device, sampling detection device includes sampling device base, steamer tray box installation screw rod, two steamer tray box installation screw rod parallel arrangement and install perpendicularly on the sampling device base, two the last a plurality of steamer tray box subassembly that stacks of steamer tray box installation screw rod, steamer tray box installation screw rod upper end screw thread installation compresses tightly the spiral shell dish, through compressing tightly the spiral shell dish can compress tightly a plurality of steamer tray box subassembly coincide.
Two operation gloves are arranged on the sealing movable door, and an observation window is arranged on the sealing movable door.
The utility model provides a mist liquid generating device is including shock muddy liquid mechanism, peristaltic pump, atomizer, shock muddy liquid mechanism includes tube box, fungus liquid test tube, tube box chassis, tube box shock drive assembly, symmetry is connected with tube box and removes the wing on the tube box lateral wall, a plurality of fungus liquid test tube cartridge is on the tube box, tube box chassis fixed mounting is on negative pressure test intracavity wall, two symmetrically set up tube box movable grooves have been seted up on the tube box chassis, tube box movable groove size and tube box movable wing assorted, tube box passes through tube box movable wing and removes the installation on the tube box chassis, tube box bottom is connected with two striking poles, the striking pole movement groove has been seted up on the tube box chassis, after the tube box installation, striking pole cartridge is in the striking pole movement groove, tube box shock drive assembly includes motor, cam, motor fixed mounting is on negative pressure test intracavity wall, the cam is fixed on motor output shaft, the cam is located between two root track levers, two the tube box movable groove is in peristaltic pump top fog inlet and fog pipeline, mist liquid inlet and mist inlet pipeline link to each other, mist inlet and mist liquid inlet pipeline link to each other.
The utility model discloses a gas-liquid sampling device, including gas-liquid inlet, gas-liquid outlet, gas-liquid pipe top is equipped with supplementary air inlet, two supplementary air inlet divides row fog liquid inlet both sides, gas-liquid pipe middle part is equipped with the pressure detection interface, gas-liquid pipe bottom is equipped with two symmetrical arrangement's fog liquid outlet, every fog liquid outlet all the pipe connection is on the one set of sampling detection device.
The drawer dish box component comprises a drawer dish box base, a drawer dish box and a box pressing cover, two drawer dish box moving groove rails which are symmetrically arranged are arranged on the drawer dish box base, a box body rear limit seat is connected behind the drawer dish box moving groove rails, drawer dish box moving wings are symmetrically connected to the outer wall of the drawer dish box, the size and the mounting position of the drawer dish box moving wings are matched with those of the drawer dish box moving groove rails, the drawer dish box is movably inserted on the drawer dish box base through the drawer dish box moving wings, a bottom butt joint column is connected to the side face of the box body rear limit seat, a spring hole which is vertically communicated is formed in the bottom butt joint column, a spring is arranged in the spring hole, the box pressing cover comprises a pressing cover plate, the automatic pressing device is characterized in that a circle of cloth pressing flange is connected to the lower end face of the pressing plate, the outer peripheral size of the cloth pressing flange is matched with the size of a drawer dish box opening, the front end of the pressing plate is connected with a drawer blocking plate, the rear end of the pressing plate is connected with a cover closing inserting plate, the size of the cover closing inserting plate is matched with that of a cover closing groove, connecting lugs which are symmetrically arranged are connected to the two sides of the pressing plate, the lower end of each connecting lug is connected with a guide post, stud inserting holes are formed in each guide post, each stud inserting hole penetrates through each guide post and each connecting lug, the diameter of each stud inserting hole is matched with that of a drawer dish box, the outer diameter of each guide post is matched with that of a spring hole, a handle is arranged on the front outer wall of the drawer dish box, and first sealing rubber strips are arranged on the upper end faces of the side walls of the drawer dish box.
The lower bottom of the drawer dish box of top layer and intermediate level is equipped with logical fog district, it is equipped with a plurality of little through-holes to lead to the fog district, above-mentioned all be equipped with second joint strip on the bottom terminal surface of drawer dish box, second joint strip circle is established in logical fog district periphery, intermediate level and bottom lead to fog drill way has been seted up on the box gland, lead to fog drill way area to be greater than logical fog district area, lead to fog drill way area to be less than second joint strip internal area, the top layer the box gland is connected with the sampling and advances fog interface, the top layer drawer dish box is interior installs the surface fabric frame mount table, fixed mounting has the surface fabric to spread the dress frame on the surface fabric frame mount table, the surface fabric of the gauze mask that has to be detected is spread on the surface fabric shop, be connected with the gas vent on the drawer dish box lateral wall of bottom.
A bacterial filtration efficiency detection method of a mask fabric comprises the following steps:
1) Sequentially stacking the drawer dish box components on a base of the sampling device to form a sampling detection device, loading the cut mask fabric to be detected into the drawer dish box components on the top layer, and rotating the compression screw disc to compress the drawer dish box components;
2) Inserting a plurality of bacterial liquid test tubes on the test tube box, and making connection pipes of all the pipelines;
3) Starting a test tube box vibration driving assembly to drive a bacterial liquid test tube to vibrate left and right for liquid mixing operation, then starting a peristaltic pump and a sprayer, leading bacterial liquid into an aerosol tube as mist aerosol, and conveying the aerosol tube to a sampling detection device;
4) After a period of experiment, closing each device in the step 3), standing for a period of time, upward screwing the screw disc, removing the compression state of the drawer dish box assembly, and extracting one or more drawer dish boxes to perform bacterial culture so as to observe and collect colony data.
The beneficial effects of the invention are as follows: the invention adopts the negative pressure detection cabinet body to carry out the test, the whole set of experimental equipment is sealed reliably, the operation is simple, the physical health of the detection personnel is protected, the sampling detection device adopts a drawer type structure, the invention has good sealing property, can ensure the smooth proceeding of the experiment, can realize the independent disassembly of drawer-dish boxes of each level respectively in the data acquisition process, provides convenience for the collection of experimental data, and also improves the disassembly and cleaning efficiency of the equipment.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a front view of the oscillating liquid mixing mechanism of the present invention;
FIG. 3 is a side view of the oscillating liquid mixing mechanism of the present invention;
FIG. 4 is a front view of the structure of the sampling detection device of the present invention;
FIG. 5 is a cross-sectional view of the top drawer assembly of the present invention;
FIG. 6 is a cross-sectional view of the structure of the middle drawer tray assembly of the present invention;
FIG. 7 is a three-dimensional block diagram of a cartridge press cover on the top drawer capsule assembly of the present invention;
FIG. 8 is a three-dimensional block diagram of a cartridge press cover on an intermediate drawer capsule assembly of the present invention;
FIG. 9 is a three-dimensional block diagram of the drawer tray base of the present invention;
fig. 10 is a three-dimensional block diagram of the drawer-dish box of the present invention.
In the figure: the detection cabinet 1, the negative pressure test chamber 11, the sealing movable door 12, the operation glove 121, the observation window 122, the aerosol tube 2, the aerosol inlet 21, the auxiliary airflow inlet 22, the pressure detection interface 23, the aerosol outlet 24, the aerosol generating device 3, the vibration liquid mixing mechanism 31, the test tube box 311, the test tube box moving wing 3111, the impact rod 3112, the bacteria liquid test tube 312, the test tube box underframe 313, the test tube box moving groove 3131, the impact rod moving groove 3132, the test tube box vibration driving assembly 314, the motor 3141, the cam 3142, the peristaltic pump 32, the sprayer 33, the bacteria liquid inlet 331, the spray outlet 332, the residual liquid recovery port 333, the sampling detection device 4, the sampling device base 41, the steamer box mounting screw 42, the steamer box assembly 43, the steamer box base 431, the vibrating liquid mixing mechanism 4311, the box back limiting seat 4312, the cover sealing groove 4313, the bottom joint column 4314, the spring hole 43141, the spring 4315, the drawer box 4321, the impact rod moving wing 4322, the first sealing column 4323, the second sealing column 4324, the vent panel 4325, the vent panel 4335, the vent cover plate 4335, the vent 4338, the vent plate 4335, the vent cover plate 4335, the top cover plate 4335, the vent 4335, the top cover plate 4335, and the top cover plate 4335.
Detailed Description
The invention is further described with reference to the drawings and detailed description, wherein the description of the invention such as "left" and "right" is directed with reference to fig. 1:
as shown in fig. 1-10, a bacteria filtration efficiency detection device of gauze mask surface fabric, including detecting cabinet 1, aerial fog pipe 2, be equipped with negative pressure test chamber 11 in detecting cabinet 1, negative pressure test chamber 11 can effectively guarantee that no bacterial gas leaks in the experiment, protection experimenter's healthy, install sealed dodge gate 12 on detecting cabinet 1, sealed dodge gate 12 can airtight negative pressure test chamber 11, during the experiment, all operations must be under the circumstances of closing sealed dodge gate 12, aerial fog pipe 2 is fixed at negative pressure test chamber 11 middle part, aerial fog pipe 2 uses as the intermediate channel of taking the aerial fog, aerial fog pipe 2 upper end pipe connection has fog liquid generating device 3, aerial fog pipe 2 lower extreme pipe connection has two sets of sampling detection device 4, take the aerial fog to produce from fog liquid generating device 3, flow to sampling detection device 4 through aerial fog pipe 2, sampling detection device 4 includes sampling device base 41, drawer box mounting screw 42, two drawer box mounting screw 42 parallel arrangement and perpendicular installation are on sampling device base 41, two drawer box mounting screw 42 are installed in the condition, a plurality of drawer boxes are installed to the drawer 43, the face fabric pan 43 can be compressed tightly by the face-piece of the face-of bacteria pan, the face-piece is compressed tightly through the face-piece of the face-piece, the face-piece is compressed tightly down set 43 is compressed tightly to the face-piece, the face-piece is compressed tightly down set 43, the face-piece is compressed tightly, and can be compressed tightly down.
Two operation gloves 121 are arranged on the sealing movable door 12, and since door opening operation is not allowed in the experimental process, all operations are performed after the operation gloves 121 are operated on the human gloves, and the observation window 122 is arranged on the sealing movable door 12, so that experimental conditions can be observed intuitively in the experimental process.
The fog generating device 3 comprises a vibration liquid mixing mechanism 31, a peristaltic pump 32 and a sprayer 33, the vibration liquid mixing mechanism 31 comprises a test tube box 311, a bacterial liquid test tube 312, a test tube box underframe 313 and a test tube box vibration driving assembly 314, test tube box moving wings 3111 are symmetrically connected to the outer side wall of the test tube box 311, a plurality of bacterial liquid test tubes 312 are inserted on the test tube box 311, bacterial liquid is filled in the bacterial liquid test tube 312, the test tube box underframe 313 is fixedly arranged on the inner wall of the negative pressure test cavity 11, two symmetrically arranged test tube box moving grooves 3131 are arranged on the test tube box underframe 313, the test tube box 3131 is matched with the test tube box moving wings 3111 in size, the test tube box 311 is movably arranged on the test tube box underframe 313 through the test tube box moving wings 3111, two impact bars 3112 are connected to the bottom of the test tube box 311, impact bar moving grooves 3132 are arranged on the test tube box underframe 313, after the test tube box 311 is arranged, the impact bars 3112 are inserted in the impact bar moving grooves 3132, the test tube box vibration driving assembly 314 comprises a motor 3141 and a cam 3142, the motor 3141 is fixedly arranged on the inner wall of the negative pressure test cavity 11, the cam 3142 is fixed on the output shaft of the motor 3141, the cam 3142 is arranged between two impact rods 3112, the two impact rods 3112 are positioned on the motion track line of the cam 3142, bacterial liquid is required to be continuously introduced to form aerosol in the process due to long experiment time, the bacterial liquid is easy to form uneven condition in a test tube after standing for a long time, the output is influenced, the vibration liquid mixing mechanism 31 is designed, the cam 3142 is driven to rotate by the motor 3141, the two impact rods 3112 are circularly impacted left and right to drive the test tube box 311 to move left and right on the test tube box underframe 313, the bacterial liquid of the bacterial liquid test tube 312 is continuously vibrated along with the circular left and right movement of the test tube box 311, the bacterial liquid is kept in a uniform state, the input end of the peristaltic pump 32 is connected with the bacterial liquid test tube 312, the atomizer 33 is provided with a bacterial liquid inlet 331, a spray outlet 332 and a residual liquid recovery port 333, the output end of the peristaltic pump 32 is connected with a bacterial liquid inlet 331 through a pipeline, the peristaltic pump 32 sucks and conveys bacterial liquid to the atomizer 33, the residual liquid recovery port 333 is connected with a bacterial liquid test tube 312 through a pipeline, the top of the aerosol tube 2 is provided with a fog liquid inlet 21, the fog liquid inlet 21 is connected with the spray outlet 332 through a pipeline, the atomizer 33 forms bacterial liquid into fog aerosol to be output into the aerosol tube 2, residual bacterial liquid remains in the aerosol forming process, and residual bacterial liquid flows back into the bacterial liquid test tube 312 through the residual liquid recovery port 333.
The top of the aerosol pipe 2 is provided with an auxiliary airflow inlet 22, the two auxiliary airflow inlets 22 are arranged on two sides of the aerosol liquid inlet 21, the auxiliary airflow inlets 22 are externally connected with an external clean air source, clean air is introduced to mix the air with the bacteria aerosol to form an air passage flowing to the sampling detection device 4, the middle part of the aerosol pipe 2 is provided with a pressure detection interface 23, in the experimental process, the inside of the aerosol pipe 2 is required to be kept in a negative pressure state to form an airflow passage from top to bottom, the pressure detection interface 23 is externally connected with a pressure sensor, the negative pressure of the aerosol pipe 2 can be measured, so that parameters are provided for adjusting the airflow speed, the bottom of the aerosol pipe 2 is provided with two symmetrically arranged aerosol liquid outlets 24, and each aerosol liquid outlet 24 is connected to one set of sampling detection device 4 through a pipeline.
The drawer dish box component 43 comprises a drawer dish box base 431, a drawer dish box 432 and a box pressing cover 433, two drawer dish box moving groove rails 4311 which are symmetrically arranged are arranged on the drawer dish box base 431, a box body rear limit seat 4312 is connected behind the drawer dish box moving groove rails 4311, drawer dish box moving wings 4321 are symmetrically connected to the outer wall of the drawer dish box 432, the size and the installation position of the drawer dish box moving wings 4321 are matched with those of the drawer dish box moving groove rails 4311, the drawer dish box 432 is movably inserted on the drawer dish box base 431 through the drawer dish box moving wings 4321, the drawer dish box 432 is installed on the drawer dish box base 431 by adopting a drawing moving structure, the disassembly and the assembly are very convenient, the box body rear limit seat 4312 plays a role in limiting positioning in place, a box body rear limit seat 4312 is provided with a cover closing groove 4313, the side surfaces of the two drawer dish box moving groove rails 4311 are connected with a bottom butt joint column 4314, a spring 4334 is provided with a spring 3715 hole which is internally provided with a spring 4356 which is penetrated up and down, the box pressing cover 433 comprises a pressing cover 4331, a circle of cloth pressing flange 4332 is connected to the lower end face of the pressing cover 4331, the outer peripheral dimension of the circle of cloth pressing flange 4332 is matched with the box opening dimension of the drawer box 432, after the box pressing cover 433 is arranged on the drawer box 432, the cloth pressing flange 4332 is inserted into the box opening of the drawer box 432, the front end of the pressing cover 4331 is connected with a retaining plate 4333, the rear end of the pressing cover 4331 is connected with a closing cover inserting plate 4334, the size of the closing cover inserting plate 4334 is matched with that of the closing cover groove 4313, two sides of the pressing cover 4331 are connected with symmetrically arranged connecting lugs 4335, the lower end of the connecting lug 4335 is connected with a guide post 4336, stud insertion holes 43361 are arranged in the guide post 4336, stud insertion holes 43361 penetrate through the guide post 4336 and the connecting lugs 4335, the diameter of the stud insertion holes 43361 is matched with the mounting screw 42 of the drawer box, the outer diameter of the guide post 4336 is matched with the spring holes 43141, when the closing cover is closed, the guide post 4336 is inserted into the spring holes 43141, the guide post 4336 is used for guiding the guide post 36, the drawer box mounting screw 42 penetrates through the guide post 4336 and the bottom butt joint post 4314, thus, the whole drawer box assembly 43 is arranged on the drawer box mounting screw 42, the pressing screw disk 44 is rotated, the box pressing cover 433 can be pressed down, the guide post 4336 can compress the spring 4315, after the drawer box is arranged, the drawer blocking plate 4333 can block the pulling-out movement of the drawer box 432, the cover closing insert plate 4334 is inserted into the cover closing groove 4313, the drawer box base 431, the drawer box 432 and the box pressing cover 433 form a sealed whole, the handle 4322 is arranged on the front outer wall of the drawer box 432, the drawer box 432 is pulled, the upper end face of the side wall of the drawer box 432 is provided with the first sealing adhesive tape 4323, after the box pressing cover 433 is pressed down in place, the first sealing adhesive tape 4323 plays the role of sealing the joint of the drawer box 432 and the box pressing cover 433, the leakage of the carrier gas mist is prevented, when the ventilation experiment is finished, the drawer dish box 432 needs to be taken out for bacterial culture and data acquisition, as long as the screw disc 44 is pressed by reverse rotation, the box pressing cover 433 can lose the downward pressure and is acted by the restoring force of the spring 4315, the box pressing cover 433 can be sprung up, the drawer blocking plate 4333 can not block the pulling-out motion of the drawer dish box 432, at this time, the drawer dish box 432 can be pulled out through the handle 4322, the whole disassembly and the installation of the drawer dish box 432 are very convenient, in the sampling process, the whole large disassembly of the sampling detection device 4 is not needed, only the screw disc 44 needs to be loosened, the independent extraction of the drawer dish box 432 on each drawer dish box component 43 can be realized, the sampling operation is convenient, and the operation of analyzing by specifically collecting single-layer or multi-layer data can be realized.
The bottom of the drawer box 432 of the top layer and the middle layer is provided with a fog passing area 4325, the fog passing area 4325 is provided with a plurality of small through holes 43251, bacteria-carrying gas fog passes through the small through holes 43251 of the fog passing area 4325, bacteria travelling along with the gas flow can stay in the fog passing area 4325 in the collision so as to facilitate subsequent bacteria cultivation, the bottom end surface of the drawer box 432 is provided with a second sealing adhesive tape 4324, the second sealing adhesive tape 4324 is arranged on the periphery of the fog passing area 4325 in a surrounding manner, the box pressing covers 433 of the middle layer and the bottom layer are provided with fog passing holes 4337 which facilitate the gas fog to pass through, the area of the fog passing holes 4337 is larger than the area of the fog passing area 4325, the area of the fog passing holes 4337 is smaller than the inner area of the second sealing adhesive tape 4324, the second sealing adhesive tape 4324 plays the role of sealing gaps between the drawer box components 43 together in the experiment so as to mainly prevent the gas fog from leaking from the outside gaps of the fog passing holes 433, the box pressing covers 433 are connected with sampling fog inlet interfaces 38, the mist inlet 4338 is the same as the mist outlet 24 at the bottom of the mist pipe 2, the bacteria-carrying mist enters from the mist inlet 4338, a fabric rack mounting table 434 is mounted in the top drawer box 432, a fabric paving rack 435 is fixedly mounted on the fabric rack mounting table 434, the fabric rack mounting table 434 is a ring and is connected to the inner side wall of the drawer box 432, the fabric paving rack 435 is paved with the mask fabric to be detected, the fabric paving rack 435 adopts a large grid structure, the spreading of the fabric is not affected, the infiltration of the filtered gas mist is not affected, when the box gland 433 is pressed down in place, the cloth pressing flange 4332 is propped against the mask fabric, the position of the mask fabric is pressed, the bottom of the cloth pressing flange 4332 can be provided with a sealing glue layer to assist sealing, the side wall of the bottom drawer box 432 is connected with an exhaust port 436, the bottom drawer box 432 is not provided with a through area 4325, the exhaust port 436 is externally connected with a mist pump, thus, a negative pressure gas path from the aerosol pipe 2 to the sampling detection device 4 can be formed, and the flow of the aerosol with bacteria can be formed to carry out the whole experiment.
A bacterial filtration efficiency detection method of a mask fabric comprises the following steps:
1) Sequentially stacking the plurality of drawer dish box assemblies 43 on the sampling device base 41 to form a sampling detection device 4, putting the cut mask fabric to be detected into the drawer dish box assemblies 43 on the top layer, and rotating the compression screw disc 44 to compress the drawer dish box assemblies 43;
2) A plurality of bacteria liquid test tubes 312 are inserted on the test tube box 311, and the connection pipe work of each pipeline is finished;
3) Starting a tube box vibration driving assembly 314 to drive a bacterial liquid tube 312 to vibrate left and right for liquid mixing operation, then starting a peristaltic pump 32 and a sprayer 33, introducing bacterial liquid into an aerosol tube 2, mixing the aerosol formed by bacterial liquid with clean air in the aerosol tube 2 to form aerosol, forming negative pressure in the aerosol tube 2, and conveying the bacterial aerosol to a sampling detection device 4 through the aerosol tube 2;
4) After a period of experiment, each device in the step 3) is closed, after standing for a period of time, the screw disc 44 is screwed upwards, the compaction state of the drawer dish box assembly 43 is relieved, one or more drawer dish boxes 432 are extracted to perform bacterial culture so as to observe and collect bacterial colony data, during the experiment, two sets of sampling detection devices 4 can be respectively filled with mask fabrics with different materials and different layer numbers for testing, the experiment efficiency can be effectively improved, or one set of sampling detection devices 4 can be not filled with mask fabrics, and the experimental data of the mask fabrics can be compared by collecting the bacterial colony numbers in the empty sampling detection devices 4, so that the bacterial filtration efficiency of the mask fabrics is obtained.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (4)
1. The utility model provides a bacterium filtration efficiency detection device of gauze mask surface fabric, includes detection cabinet (1), aerial fog pipe (2), its characterized in that: the utility model discloses a vacuum test device, which is characterized in that a negative pressure test cavity (11) is arranged in the test cabinet (1), a sealing movable door (12) is arranged on the test cabinet (1), the sealing movable door (12) can seal the negative pressure test cavity (11), an aerosol pipe (2) is fixed in the middle of the negative pressure test cavity (11), an aerosol generating device (3) is connected with an upper end pipeline of the aerosol pipe (2), two sets of sampling detection devices (4) are connected with a lower end pipeline of the aerosol pipe (2), the sampling detection devices (4) comprise a sampling device base (41) and drawer and box mounting screws (42), the two drawer and box mounting screws (42) are arranged in parallel and are vertically arranged on the sampling device base (41), a plurality of drawer dish box components (43) are stacked on the drawer dish box mounting screws (42), compression screw discs (44) are mounted at the upper ends of the drawer dish box mounting screws (42) in a threaded mode, the drawer dish box components (43) can be compressed in a stacked mode through the compression screw discs (44), the mist generating device (3) comprises a vibration liquid mixing mechanism (31), a peristaltic pump (32) and a sprayer (33), the vibration liquid mixing mechanism (31) comprises a test tube box (311), a bacterial liquid test tube (312), a test tube box underframe (313) and a test tube box vibration driving component (314), the utility model discloses a test tube box, including test tube box (311) and test tube box, test tube box (311) are characterized in that test tube box movable wings (3111) are symmetrically connected to the outer side wall of test tube box (311), a plurality of fungus liquid test tube (312) cartridge is on test tube box (311), test tube box chassis (313) fixed mounting is on negative pressure test chamber (11) inner wall, offer two test tube box movable grooves (3131) that symmetry set up on test tube box chassis (313), test tube box movable groove (3131) size and test tube box movable wings (3111) phase-match, test tube box (311) are installed on test tube box chassis (313) through test tube box movable wings (3111) removal, test tube box (311) bottom is connected with two striking poles (3112), offer striking pole movable groove (3132) on test tube box chassis (313), after test tube box (311) are installed, striking pole (3112) cartridge is in striking pole movable groove (3132), test tube box vibration drive assembly (314) include motor (3141), cam (3142), motor (3141) are installed on negative pressure test chamber (3132) fixed mounting is on test tube box chassis (3142), on two cam (3142) track are located between two fixed connection of test tube pump (3142), the utility model is characterized in that the atomizer (33) is provided with a bacterial liquid inlet (331), a spray outlet (332) and a residual liquid recovery port (333), the output end of the peristaltic pump (32) is connected with a bacterial liquid inlet (331) pipeline, the residual liquid recovery port (333) is connected with a bacterial liquid test tube (312) pipeline, the top of the aerosol tube (2) is provided with a fog liquid inlet (21), the fog liquid inlet (21) is connected with a spray outlet (332) pipeline, the drawer and dish box assembly (43) comprises a drawer and dish box base (431), a drawer and dish box (432) and a box pressing cover (433), two drawer and dish box moving groove rails (4311) which are symmetrically arranged are arranged on the drawer and dish box base (431), the drawer dish box moving groove rail (4311) is connected with a box body rear limit seat (4312) at the rear, drawer dish box moving wings (4321) are symmetrically connected to the outer wall of the drawer dish box (432), the size and the mounting position of the drawer dish box moving wings (4321) are matched with those of the drawer dish box moving groove rail (4311), the drawer dish box (432) is movably inserted on a drawer dish box base (431) through the drawer dish box moving wings (4321), a cover closing groove (4313) is formed in the box body rear limit seat (4312), bottom butt joint posts (4314) are connected to the side faces of the two drawer dish box moving groove rails (4311), spring holes (43141) which are vertically communicated are formed in the bottom butt joint posts (4314), the spring hole (43141) is internally provided with a spring (4315), the box pressing cover (433) comprises a pressing cover plate (4331), a circle of cloth pressing flange (4332) is connected to the lower end face of the pressing cover plate (4331), the outer peripheral dimension of the cloth pressing flange (4332) is matched with the box opening dimension of the drawer dish box (432), the front end of the pressing cover plate (4331) is connected with a drawer blocking plate (4333), the rear end of the pressing cover plate (4331) is connected with a closing cover inserting plate (4334), the dimension of the closing cover inserting plate (4334) is matched with that of the closing cover groove (4313), connecting lugs (4335) which are symmetrically arranged are connected to the two sides of the pressing cover plate (4331), the lower end of the connecting lugs (4335) is connected with guide posts (4336), be equipped with double-screw bolt jack (43361) in guide post (4336), double-screw bolt jack (43361) run through guide post (4336) and engaging lug (4335), double-screw bolt jack (43361) diameter and steamer tray dish box installation screw rod (42) phase-match, guide post (4336) external diameter size and spring hole (43141) phase-match, install handle (4322) on outer wall before steamer tray dish box (432), be equipped with first joint strip (4323) on steamer tray dish box (432) lateral wall up end, top layer and intermediate level the lower bottom of steamer tray dish box (432) is equipped with logical fog zone (4325), logical fog zone (4325) are equipped with a plurality of little through-holes (43251), above-mentioned all be equipped with second joint strip (4324) on the bottom face of steamer tray dish box (432), second joint strip (4324) circle is established in logical fog area (4325) periphery, intermediate level and bottom offer logical fog drill way (4337) on box gland (433), lead to fog drill way (4337) area to be greater than logical fog area (4325) area, lead to fog drill way (4337) area to be less than second joint strip (4324) internal area, the top layer be connected with sampling fog inlet (4338) on box gland (433), the top layer install surface fabric frame mount table (434) in steamer tray dish box (432), fixed mounting has surface fabric shop rack (435) on surface fabric shop rack (435), the gauze mask surface fabric of waiting to detect has been laid on surface fabric shop rack (435), be connected with gas vent (436) on the steamer tray dish box (432) lateral wall of bottom.
2. The bacteria filtering efficiency detection device of a mask fabric as defined in claim 1, wherein: two operation gloves (121) are arranged on the sealing movable door (12), and an observation window (122) is arranged on the sealing movable door (12).
3. The bacteria filtering efficiency detection device of a mask fabric as defined in claim 1, wherein: the utility model discloses a sampling device, including aerial fog pipe (2), sampling device, pressure detection interface, gas-liquid outlet (24), gas-liquid inlet (22), two be equipped with at aerial fog pipe (2) top auxiliary air current import (22), auxiliary air current import (22) branch are listed as fog liquid import (21) both sides, aerial fog pipe (2) middle part is equipped with pressure detection interface (23), aerial fog pipe (2) bottom is equipped with two symmetrical arrangement's fog liquid outlet (24), every fog liquid outlet (24) all pipe connection is on one set of sampling device (4).
4. A bacterial filtration efficiency detection method of a mask fabric is characterized by comprising the following steps: a bacteria filtering efficiency detecting apparatus using a mask fabric according to any one of claims 1 to 3, comprising the steps of:
1) Sequentially stacking a plurality of drawer dish box components (43) on a sampling device base (41) to form a sampling detection device (4), loading the cut mask fabric to be detected into the drawer dish box components (43) on the top layer, and rotating a compression screw disc (44) to compress the drawer dish box components (43);
2) Inserting a plurality of bacterial liquid test tubes (312) on the test tube box (311), and making connection pipes of all the pipelines;
3) Starting a tube box vibration driving assembly (314) to drive a bacterial liquid tube (312) to vibrate left and right for liquid mixing operation, then starting a peristaltic pump (32) and a sprayer (33), leading bacterial liquid into an aerosol tube (2) to form aerosol, and conveying the aerosol to a sampling detection device (4) through the aerosol tube (2);
4) After a period of experiment, closing each device in the step 3), standing for a period of time, screwing the compaction screw disc (44) upwards, removing the compaction state of the drawer dish box assembly (43), and extracting one or more drawer dish boxes (432) to perform bacterial culture so as to observe and collect colony data.
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| CN202110174586.3A CN113008754B (en) | 2021-02-07 | 2021-02-07 | Bacteria filtering efficiency detection device and detection method for mask fabric |
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| CN202110174586.3A CN113008754B (en) | 2021-02-07 | 2021-02-07 | Bacteria filtering efficiency detection device and detection method for mask fabric |
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| CN113008754A (en) | 2021-06-22 |
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