CN112964518A - A nitrogen gas concentration detection device for food storage warehouse - Google Patents
A nitrogen gas concentration detection device for food storage warehouse Download PDFInfo
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- CN112964518A CN112964518A CN202110184740.5A CN202110184740A CN112964518A CN 112964518 A CN112964518 A CN 112964518A CN 202110184740 A CN202110184740 A CN 202110184740A CN 112964518 A CN112964518 A CN 112964518A
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 114
- 238000001514 detection method Methods 0.000 title claims abstract description 20
- 229910001873 dinitrogen Inorganic materials 0.000 title description 3
- 230000007246 mechanism Effects 0.000 claims abstract description 64
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 56
- 238000004891 communication Methods 0.000 claims description 13
- 239000002274 desiccant Substances 0.000 claims description 2
- 238000000605 extraction Methods 0.000 abstract description 27
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 150000002829 nitrogen Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000005086 pumping 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
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
The invention discloses a nitrogen concentration detection device for a food storage warehouse, which comprises a plurality of air pumps and air extraction pipelines arranged at different positions of the food storage warehouse, wherein the air pumps are communicated with the air extraction pipelines, the other end of each air extraction pipeline is provided with a nitrogen concentration detector communicated with the air extraction pipeline, a plurality of detachable air bags are arranged inside each air extraction pipeline, the air bags are communicated with each other, baffles are arranged inside each air extraction pipeline, one air bag is communicated with the baffle, the air extraction pipeline is provided with a through groove, the surface of each air extraction pipeline is provided with a shielding mechanism for shielding the air bags and the through grooves, the inner wall of each air extraction pipeline and the shielding mechanism are respectively provided with a plurality of groups of fixing mechanisms, the device can detect the nitrogen concentration in the food storage warehouse and collect the nitrogen concentrations at different positions of the food storage warehouse according to requirements, the detection accuracy is improved.
Description
Technical Field
The invention relates to a nitrogen detection device, in particular to a nitrogen concentration detection device for a food storage warehouse.
Background
When food is stored in the food storage warehouse for a long time, the state of high nitrogen concentration in the food storage warehouse needs to be kept constantly, so that the deterioration of food under the oxidation action of oxygen can be effectively reduced, the freshness of the food can be effectively ensured, the loss rate of the food is effectively reduced, the problem that the running cost of the food storage warehouse is overhigh and the nitrogen concentration in different time periods in the food storage warehouse needs to be detected is solved, in the prior art, a plurality of nitrogen collecting barrels are adopted for respectively collecting the nitrogen, the nitrogen collecting barrels with large volume are required, the weight is heavy and the nitrogen is not easy to transfer, in order to conveniently transfer and detect the nitrogen collected in batches in each time period, the light nitrogen collecting containers are required to be adopted for collecting, but in the collecting process, the light nitrogen collecting containers are easy to shake back and forth due to the impact force of air flow, easily causing damage to the nitrogen collection container.
Disclosure of Invention
In view of the above problems, the present invention provides a nitrogen concentration detection apparatus for a food storage warehouse, which can effectively detect nitrogen concentration in the food storage warehouse and collect nitrogen concentrations at different positions of the food storage warehouse according to actual needs, and can collect and subsequently detect nitrogen in different time periods, and is easy to disassemble and transport a nitrogen collection container, thereby reducing the damage rate of the nitrogen collection container.
The invention provides a nitrogen concentration detection device for a food storage warehouse, which comprises a plurality of air pumps and air extraction pipelines arranged at different positions of the food storage warehouse, wherein the air pumps are communicated with the air extraction pipelines, the other end of each air extraction pipeline is provided with a nitrogen concentration detector communicated with the other end of each air extraction pipeline, a plurality of detachable air bags are arranged inside each air extraction pipeline, the air bags are communicated with each other, baffles are arranged inside each air extraction pipeline, one air bag is communicated with the baffle, the air extraction pipelines are provided with through grooves, the surfaces of the air extraction pipelines are provided with shielding mechanisms for shielding the air bags and the through grooves, the inner walls of the air extraction pipelines and the shielding mechanisms are respectively provided with a plurality of groups of fixing mechanisms, each fixing mechanism comprises a first annular magnet, a spring, a second annular magnet, a first sucker and a hollow pipe with a sealed top, the first annular magnet is connected with the shielding mechanism, one end of the spring passes through the first annular magnet and is connected with the shielding mechanism, the first sucker is connected with the bottom of the hollow pipe, the other end of the spring passes through the second annular magnet to be connected with the top of the hollow pipe, a second sucker is arranged in the first sucker, a first telescopic mechanism is arranged at the top of the first sucker, the fixed end of the first telescopic mechanism is fixedly connected with the inner wall of the hollow pipe, a third sucking disc is arranged in the second sucking disc, the top of the third sucker is provided with a second telescopic mechanism which is positioned in the first telescopic mechanism, the second telescopic mechanism is fixedly connected with the first telescopic mechanism, and the first telescopic mechanism, the second telescopic mechanism, the air pump and the nitrogen concentration detector are all electrically connected with an external power supply.
Furthermore, a pressure gauge is arranged on the air exhaust pipeline.
Furthermore, a filter is arranged on the air exhaust pipeline.
Furthermore, the drying device also comprises a box body for containing the drying agent, and the box body is arranged on the air exhaust pipeline.
Further, still include touch display screen and controller, be equipped with the solenoid valve on the exhaust duct, the controller with touch display screen signal connection, the controller with solenoid valve signal connection, nitrogen gas concentration detector with touch display screen signal connection, first telescopic machanism with second telescopic machanism all with controller signal connection, touch display screen and controller all are connected with external power supply electricity, still include mobile terminal and communication module, communication module with controller signal connection, mobile terminal with communication module signal connection.
Further, first telescopic machanism includes first electric telescopic handle and hollow tube, first electric telescopic handle with hollow tube fixed connection, the hollow tube pass first sucking disc and with second sucking disc fixed connection, second telescopic machanism includes second electric telescopic handle, the stiff end of second electric telescopic handle with the inner wall fixed connection of hollow tube, the flexible end of second electric telescopic handle pass the second sucking disc and with third sucking disc fixed connection, the inside of first sucking disc, second sucking disc and third sucking disc all is equipped with baroceptor, first electric telescopic handle and second electric telescopic handle all are connected with external power supply electricity, baroceptor, first electric telescopic handle and second electric telescopic handle all with controller signal connection.
Furthermore, it includes that the cross-section is the apron of type to shelter from the mechanism, the apron respectively with the spring with first annular magnet fixed connection, the inlet end of gasbag is equipped with the check valve that is used for preventing the gas refluence, the end of giving vent to anger of gasbag is equipped with the control valve, and is adjacent each other UNICOM between the gasbag.
The invention has the beneficial effects that:
the invention relates to a nitrogen concentration detection device for a food storage warehouse, which can collect and detect gas at different positions of the warehouse through the matching of an air pump, an air exhaust pipeline and a nitrogen concentration detector when the nitrogen concentration detection is required, can collect and detect the nitrogen through the air bag in the second pipeline when the nitrogen in different time periods needs to be sampled, can gradually enlarge under the action of inflation after the air bag is inflated and expanded, and can be attached to and adsorbed by the first sucker when the air bag is expanded to a certain degree, so that the air bag is prevented from being impacted by air flow during the inflation process to shake back and forth, the problem that the air bag is easy to break under the back and forth shaking is reduced, and the surface of the air bag can be propped open during the gradual inflation and enlargement process, the radian of the surface of the air bag can be changed along with the inflation of the air bag, so that the first sucker is separated from the air bag, the first sucker is squeezed by the air bag after the air bag is inflated, the first sucker and the hollow pipe compress the spring together, the first annular magnet and the second annular magnet are attracted together, the first sucker is far away from the air bag, the air bag can be attracted by the second sucker through the extension of the first telescopic mechanism, the air bag can be effectively fixed due to the fact that the second sucker is smaller than the first sucker, after the air bag is inflated and expanded continuously, the surface of the air bag is further expanded, the second sucker is separated from the air bag, and then the first telescopic mechanism can be contracted, the third sucker adsorbs the air bag through the extension of the second telescopic mechanism, so that the air bag can be effectively fixed, nitrogen in different time periods can be flushed into different air bags through the use of the device, then the shielding mechanism is opened, the air bag is taken out through the through groove, subsequent selection and corresponding detection are facilitated, in addition, the air bag is prevented from being damaged due to back and forth shaking through the alternate adsorption of the first sucker, the second sucker and the third sucker, the air bag is prevented from being broken and leaking due to the fact that the air bag and the first sucker, the second sucker or the third sucker move relatively and rub the surface of the air bag, the actuation is effectual, moreover the gasbag is quick detachable and transportation the gasbag reduces the spoilage of gasbag.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only preferred embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is an overall configuration view of a nitrogen concentration detecting apparatus for a food storage warehouse according to the present invention;
fig. 2 is a sectional view showing a partial structure of a nitrogen concentration detecting apparatus for a food storage warehouse according to the present invention;
FIG. 3 is a partial sectional view of a hollow pipe of a nitrogen concentration detecting apparatus for a food storage warehouse according to the present invention;
fig. 4 is a partial sectional view of a hollow tube of a nitrogen concentration detecting apparatus for a food storage warehouse according to the present invention.
In the figure, 1 is an air pump, 2 is an air exhaust pipeline, 3 is a nitrogen concentration detector, 4 is an air bag, 5 is a baffle, 6 is a through groove, 7 is a first annular magnet, 8 is a spring, 9 is a second annular magnet, 10 is a first suction cup, 11 is a hollow tube, 12 is a second suction cup, 13 is a third suction cup, 14 is a pressure gauge, 15 is a filter, 16 is a box body, 17 is a touch display screen, 18 is a controller, 19 is an electromagnetic valve, 20 is a mobile terminal, 21 is a communication module, 22 is a first electric telescopic rod, 23 is a hollow tube, 24 is a second electric telescopic rod, 25 is an air pressure sensor, 26 is a cover plate, 27 is a one-way valve, and 28 is a control valve.
Detailed Description
In order to better understand the technical content of the invention, specific embodiments are provided below, and the invention is further described with reference to the accompanying drawings.
Referring to fig. 1 to 4, the invention provides a nitrogen concentration detection device for a food storage warehouse, which comprises a plurality of air pumps 1 and air extraction pipelines 2 arranged at different positions of the food storage warehouse, wherein the air pumps 1 are communicated with the air extraction pipelines 2, the other end of each air extraction pipeline 2 is provided with a nitrogen concentration detector 3 communicated with the air extraction pipeline 2, a plurality of detachable air bags 4 are arranged inside each air extraction pipeline 2, the air bags 4 are communicated with each other, baffles 5 are arranged inside the air extraction pipelines 2, one air bag 4 is communicated with the baffle 5, through grooves 6 are arranged on the air extraction pipelines 2, shielding mechanisms for shielding the air bags 4 and the through grooves 6 are arranged on the surfaces of the air extraction pipelines 2, a plurality of groups of fixing mechanisms are arranged on the inner walls of the air extraction pipelines 2 and the shielding mechanisms, and the fixing mechanisms comprise first annular magnets 7, The device comprises a spring 8, a second annular magnet 9, a first sucker 10 and a hollow pipe 11 with the top sealed, wherein the first annular magnet 7 is connected with a shielding mechanism, one end of the spring 8 penetrates through the first annular magnet 7 to be connected with the shielding mechanism, the first sucker 10 is connected with the bottom of the hollow pipe 11, the other end of the spring 8 penetrates through the second annular magnet 9 to be connected with the top of the hollow pipe 11, a second sucker 12 is arranged in the first sucker 10, a first telescopic mechanism is arranged at the top of the first sucker 10, the fixed end of the first telescopic mechanism is fixedly connected with the inner wall of the hollow pipe 11, a third sucker 13 is arranged in the second sucker 12, a second telescopic mechanism is arranged at the top of the third sucker 13 and is positioned in the first telescopic mechanism, and the second telescopic mechanism is fixedly connected with the first telescopic mechanism, the first telescopic mechanism, the second telescopic mechanism, the air extracting pump 1 and the nitrogen concentration detector 3 are electrically connected with an external power supply, when the nitrogen concentration is required to be detected, the air at different positions of the warehouse can be collected and detected through the cooperation between the air extracting pump 1, the air extracting pipeline 2 and the nitrogen concentration detector 3, when the nitrogen at different time periods is required to be sampled, the air bag 4 in the second pipeline collects the nitrogen, after the air bag 4 is inflated and expanded, the air bag 4 can be gradually enlarged under the inflation action, when the air bag 4 is expanded to a certain degree, the surface with which the air bag 4 is connected can be attached to the first suction disc 10 and adsorbed together, so that the air bag 4 is prevented from being impacted by air flow to shake back and forth in the inflation process, and the problem that the air bag 4 is easy to break down when shaking back and forth is reduced, because the surface of the airbag 4 is expanded in the process of gradually inflating and enlarging, and the radian of the surface of the airbag 4 is changed along with the inflation of the airbag 4, the first suction disc 10 is separated from the airbag 4, because the airbag 4 presses the first suction disc 10 after being inflated, the first suction disc 10 and the hollow tube 11 compress the spring 8 together, so that the first annular magnet 7 and the second annular magnet 9 are attracted together, the first suction disc 10 is far away from the airbag 4, and through the extension of the first telescopic mechanism, the second suction disc 12 can suck the airbag 4, because the second suction disc 12 is smaller than the first suction disc 10, the airbag 4 can be effectively fixed, and after the airbag 4 is inflated and expanded continuously, the surface of the airbag 4 is further expanded, so that the second suction cup 12 is separated from the airbag 4, the first telescopic mechanism can be contracted, the airbag 4 can be adsorbed by the third suction cup 13 through the extension of the second telescopic mechanism, and the airbag 4 can be effectively fixed, through the use of the device, nitrogen in different time periods can be flushed into different airbags 4, the shielding mechanism is opened, the airbag 4 can be taken out through the through groove 6, the subsequent selection and the corresponding detection are convenient, in addition, through the alternate adsorption of the first suction cup 10, the second suction cup 12 and the third suction cup 13 to the airbag 4, the airbag 4 can be prevented from shaking back and forth to cause damage, and the airbag 4 with gradually increased volume can be adsorbed by the first suction cup 10, the second suction cup 12 or the third suction cup 13 in turn, avoid gasbag 4 with relative movement and friction appear in first sucking disc 10, second sucking disc 12 or third sucking disc 13 gasbag 4 surface and lead to the gasbag 4 breaks gas leakage, the actuation is effectual, moreover gasbag 4 is quick detachable and transportation gasbag 4 reduces the spoilage of gasbag 4.
Specifically, the air exhaust pipeline 2 is further provided with a pressure gauge 14, and the pressure gauge 14 can be used for monitoring the air pressure in real time.
Specifically, be equipped with filter 15 on the bleed pipeline 2, through filter 15 can filter the impurity of pumping in-process suction, reduces the condition emergence that the error appears in the testing process.
Specifically, still including the box body 16 that is used for holding the drier, box body 16 locates on the exhaust duct 2, through the drier in the box body 16 can be with the steam filtering in the gas that awaits measuring, reduces the condition emergence of error in the testing process.
Specifically, the system comprises a touch display screen 17 and a controller 18, an electromagnetic valve 19 is arranged on the air exhaust pipeline 2, the controller 18 is in signal connection with the touch display screen 17, the controller 18 is in signal connection with the electromagnetic valve 19, the nitrogen concentration detector 3 is in signal connection with the touch display screen 17, the first telescopic mechanism and the second telescopic mechanism are in signal connection with the controller 18, the touch display screen 17 and the controller 18 are electrically connected with an external power supply, the system further comprises a mobile terminal 20 and a communication module 21, the communication module 21 is in signal connection with the controller 18, the mobile terminal 20 is in signal connection with the communication module 21, and through the cooperation of the mobile terminal 20 and the communication module 21, a worker can rapidly and remotely acquire nitrogen detection data, and meanwhile, the condition that the concentration of a food storage warehouse manager is falsely reported by manual detection is reduced, the staff can send a control signal to the communication module 21 according to the mobile terminal 20 or the touch display screen 17, and then send the signal to the controller 18 through the communication module 21, so as to control the opening or closing of the electromagnetic valve 19 through the controller 18.
Specifically, the first telescopic mechanism comprises a first electric telescopic rod 22 and a hollow tube 23, the first electric telescopic rod 22 is fixedly connected with the hollow tube 23, the hollow tube 23 passes through the first suction cup 10 and is fixedly connected with the second suction cup 12, the second telescopic mechanism comprises a second electric telescopic rod 24, the fixed end of the second electric telescopic rod 24 is fixedly connected with the inner wall of the hollow tube 23, the telescopic end of the second electric telescopic rod 24 passes through the second suction cup 12 and is fixedly connected with the third suction cup 13, air pressure sensors 25 are arranged inside the first suction cup 10, the second suction cup 12 and the third suction cup 13, the air pressure sensors 25, the first electric telescopic rod 22 and the second electric telescopic rod 24 are all electrically connected with an external power supply, the air pressure sensors 25, the first electric telescopic rod 22 and the second electric telescopic rod 24 are all in signal connection with the controller 18, when the air pressure in the first suction cup 10 changes from the negative pressure state to the normal state, the controller 18 controls the first electric telescopic rod 22 to extend and the first suction cup 10 to suck the airbag 4, and when the air pressure in the second suction cup 12 changes from the negative pressure state to the normal state, the controller 18 controls the first electric telescopic rod 22 to contract and the second electric telescopic rod 24 to extend, so that the third suction cup 13 sucks the airbag 4, and when the air pressure in the third suction cup 13 changes from the negative pressure state to the normal state, the controller 18 can control the second electric telescopic rod 24 to contract, so that the first suction cup 10, the second suction cup 12 and the third suction cup 13 can suck the airbag 4 in turn.
Specifically, the shielding mechanism comprises a cover plate 26 with a convex cross section, the cover plate 26 is respectively fixedly connected with the spring 8 and the first annular magnet 7, the air inlet end of the air bag 4 is provided with a one-way valve 27 for preventing gas from flowing backwards, the air outlet end of the air bag 4 is provided with a control valve 28, the adjacent air bags 4 are communicated with each other, through the action of the cover plate 26, the through groove 6 on the second pipeline can be shielded, and by the action of the control valve 28, when the air bag 4 far from the baffle 5 is filled with air, the control valve 28 on the air bag 4 adjacent to the control valve is controlled to be closed by the controller 18, thereby, the air bags 4 are filled one by one, so that nitrogen in different time periods is collected, the subsequent detection is convenient, and the nitrogen can be prevented from flowing backwards through the action of the one-way valve 27.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A nitrogen concentration detection device for a food storage warehouse is characterized by comprising a plurality of air pumps and air exhaust pipelines arranged at different positions of the food storage warehouse, wherein the air pumps are communicated with the air exhaust pipelines, the other end of each air exhaust pipeline is provided with a nitrogen concentration detector communicated with the air exhaust pipelines, a plurality of detachable air bags are arranged inside the air exhaust pipelines, the air bags are communicated with each other, baffles are arranged inside the air exhaust pipelines, one of the air bags is communicated with the baffles, the air exhaust pipelines are provided with through grooves, shielding mechanisms used for shielding the air bags and the through grooves are arranged on the surfaces of the air exhaust pipelines, a plurality of groups of fixing mechanisms are arranged on the inner walls of the air exhaust pipelines and the shielding mechanisms, each fixing mechanism comprises a first annular magnet, a spring, a second annular magnet, a first sucker and a hollow pipe with sealed top, the first annular magnet is connected with the shielding mechanism, one end of the spring passes through the first annular magnet and is connected with the shielding mechanism, the first sucker is connected with the bottom of the hollow pipe, the other end of the spring passes through the second annular magnet to be connected with the top of the hollow pipe, a second sucker is arranged in the first sucker, a first telescopic mechanism is arranged at the top of the first sucker, the fixed end of the first telescopic mechanism is fixedly connected with the inner wall of the hollow pipe, a third sucking disc is arranged in the second sucking disc, the top of the third sucker is provided with a second telescopic mechanism which is positioned in the first telescopic mechanism, the second telescopic mechanism is fixedly connected with the first telescopic mechanism, and the first telescopic mechanism, the second telescopic mechanism, the air pump and the nitrogen concentration detector are all electrically connected with an external power supply.
2. The apparatus of claim 1, wherein the air exhaust pipe is further provided with a pressure gauge.
3. The apparatus of claim 1, wherein the air exhaust pipe is provided with a filter.
4. The nitrogen concentration detection device for the food storage warehouse of claim 1, further comprising a box for containing a desiccant, wherein the box is disposed on the air exhaust pipeline.
5. The nitrogen concentration detection device for the food storage warehouse as claimed in claim 1, further comprising a touch display screen and a controller, wherein an electromagnetic valve is arranged on the air exhaust pipeline, the controller is in signal connection with the touch display screen, the controller is in signal connection with the electromagnetic valve, the nitrogen concentration detector is in signal connection with the touch display screen, the first telescopic mechanism and the second telescopic mechanism are in signal connection with the controller, the touch display screen and the controller are both electrically connected with an external power supply, and further comprising a mobile terminal and a communication module, the communication module is in signal connection with the controller, and the mobile terminal is in signal connection with the communication module.
6. The nitrogen concentration detecting apparatus for a food storage warehouse according to claim 1, it is characterized in that the first telescopic mechanism comprises a first electric telescopic rod and a hollow pipe, the first electric telescopic rod is fixedly connected with the hollow pipe, the hollow pipe penetrates through the first sucker and is fixedly connected with the second sucker, the second telescopic mechanism comprises a second electric telescopic rod, the fixed end of the second electric telescopic rod is fixedly connected with the inner wall of the hollow pipe, the telescopic end of the second electric telescopic rod penetrates through the second sucker and is fixedly connected with the third sucker, the first sucker, the second sucker and the third sucker are all internally provided with an air pressure sensor, the first electric telescopic rod and the second electric telescopic rod are all electrically connected with an external power supply, the air pressure sensor, the first electric telescopic rod and the second electric telescopic rod are in signal connection with the controller.
7. The nitrogen concentration detection device for the food storage warehouse as claimed in claim 1, wherein the shielding mechanism includes a cover plate having a convex cross-section, the cover plate is fixedly connected to the spring and the first ring magnet, respectively, an air inlet end of the air bag is provided with a check valve for preventing backflow of air, an air outlet end of the air bag is provided with a control valve, and adjacent air bags are communicated with each other.
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| CN202110184740.5A CN112964518A (en) | 2021-02-10 | 2021-02-10 | A nitrogen gas concentration detection device for food storage warehouse |
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| CN202110184740.5A CN112964518A (en) | 2021-02-10 | 2021-02-10 | A nitrogen gas concentration detection device for food storage warehouse |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117783448A (en) * | 2024-02-23 | 2024-03-29 | 东方信腾档案管理有限公司 | Novel warehouse air quality comprehensive detection alarm device and method |
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