CN113790935A - Gas sampling device and oil smoke probe - Google Patents
Gas sampling device and oil smoke probe Download PDFInfo
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- CN113790935A CN113790935A CN202111195846.1A CN202111195846A CN113790935A CN 113790935 A CN113790935 A CN 113790935A CN 202111195846 A CN202111195846 A CN 202111195846A CN 113790935 A CN113790935 A CN 113790935A
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- 238000005070 sampling Methods 0.000 title claims abstract description 84
- 239000000523 sample Substances 0.000 title claims abstract description 35
- 239000000779 smoke Substances 0.000 title abstract description 24
- 239000007789 gas Substances 0.000 claims description 48
- 229920000742 Cotton Polymers 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 6
- 239000003517 fume Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 37
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 238000010926 purge Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 3
- 230000002411 adverse Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 238000000605 extraction Methods 0.000 abstract 1
- 238000003780 insertion Methods 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 239000006233 lamp black Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 239000004071 soot Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000411 inducer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010408 sweeping 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
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N1/2205—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling with filters
-
- 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
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N1/2211—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling with cyclones
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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
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N1/2214—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling by sorption
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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
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2258—Sampling from a flowing stream of gas in a stack or chimney
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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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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a gas sampling device and an oil smoke probe, which adopt a sampling air inlet channel and a sampling exhaust channel which are coaxially nested, and realize extraction type sampling in an insertion type installation mode. The sampling air inlet channel is of a spiral labyrinth structure and can fully adsorb micro oil drops in the sampling gas, so that the service life of the probe measuring element is prolonged, and the precision loss caused by oil stain adhesion is reduced. The spiral labyrinth structure of the diversion light chopper and the air inlet channel arranged in the exhaust channel can effectively prevent external light from entering the measuring cavity through the air pipe, thereby eliminating the adverse effect of the ambient light on the measuring result. The oil smoke probe gas sampling device is internally provided with an air inlet channel and an air inlet switching valve, so that an oil smoke sampling mode and an air purging calibration mode can be realized, the cleanness of a measuring element can be ensured, structural support is provided for realizing more flexible and accurate data measurement, and the service life of the probe measuring element is prolonged.
Description
Technical Field
The invention relates to the field of environmental monitoring, in particular to a gas sampling device and an oil smoke probe.
Background
Along with the continuous improvement of the living standard of people, the development of the catering industry is very rapid, and the oil smoke emission of catering enterprises also pollutes the environment while bringing convenience to the life of people. In recent years, the supervision of oil fume treatment is continuously strengthened in various places, the catering oil fume treatment enters the normalized management, and the oil fume online monitoring equipment is also put into application in batches.
In the detection process of the existing oil smoke detection probe, tiny liquid drops in oil smoke are easy to adhere to the surfaces of a measurement sensor and an optical device in a measurement cavity, so that the measurement accuracy is reduced, the zero drift is caused, the reliability of the probe is reduced, and the service life of the probe is prolonged.
Disclosure of Invention
In view of the above, the present invention provides a gas sampling device and a soot probe to overcome the disadvantages of the prior art.
The invention provides the following technical scheme: a gas sampling device comprises a probe body, an inner air pipe, an outer air pipe, an annular valve core and a fan; the inner air pipe is coaxially nested inside the outer air pipe, a cavity between the inner air pipe and the outer air pipe forms a sampling air inlet channel, and the inner space of the inner air pipe forms an exhaust channel; one ends of the inner air pipe and the outer air pipe are connected through an air pipe head, and the other ends of the inner air pipe and the outer air pipe are connected with the probe body; a measuring cavity, a measuring air inlet channel, a fan air inlet hole and a valve core hole are arranged in the probe body; the measuring cavity is respectively communicated with the exhaust channel and the measuring air inlet channel, the valve core hole is communicated with the fan air inlet hole, the measuring air inlet channel is communicated with the fan air inlet hole, and the fan is arranged between the measuring air inlet channel and the fan air inlet hole; the annular valve core is slidably arranged in the valve core hole and is sleeved on the outer cylindrical surface of the inner air pipe; the outer air pipe is provided with a sampling air inlet on the cylindrical surface close to the air pipe head, and the sampling air inlet is communicated with the sampling air inlet channel.
In some embodiments of the present invention, the spiral groove is provided with baffles which are staggered in height.
Furthermore, both ends of the inner air pipe are provided with a diversion light chopper which is positioned in the exhaust channel; the diversion light chopper is cylindrical, and a first conical diversion light shielding plate and a second conical diversion light shielding plate with opposite vertex angles are arranged at two ends of the diversion light chopper; the first conical diversion shading plate is arranged at an air inlet of the diversion shading device and is opened at the small end of the cone; the second conical diversion shading plate is arranged at an air outlet of the diversion shading device, and a hole is formed in the big end of the cone.
Furthermore, a cylindrical filter screen I and an annular filter screen II are respectively arranged in an outer air pipe of the sampling air inlet.
Further, the probe body comprises an upper cover and a lower cover; the top of the upper cover is provided with a circuit box; the bottom of the lower cover is provided with an air inlet hole, and one part of the outer cylindrical surface of the annular valve core is used for closing or opening the air inlet hole and communicated with the valve core hole.
Furthermore, the annular end face of the annular valve core is used for closing or opening the sampling air inlet channel to be communicated with the valve core hole.
Furthermore, an electromagnet is arranged on the annular end face of the valve core hole, and an armature pull rod of the electromagnet is connected with the annular valve core.
Furthermore, air filter cotton is arranged in the air inlet hole.
Further, the inner air pipe is coaxial with the valve core hole; an outlet protective net is arranged at the joint of the inner air pipe and the air pipe head.
The invention also provides an oil smoke probe which comprises the gas sampling device.
The embodiment of the invention has the following advantages: the sampling air inlet channel and the sampling air outlet channel are coaxially nested, so that the structure is compact and the installation is convenient; through spiral labyrinth sampling inlet channel's structure, the tiny oil that fully adsorbs in the sampling gas drips to reduce the measurement chamber precision loss that causes because the greasy dirt adheres to, prolong gas collection system's life.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible and comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram illustrating a perspective view of a gas sampling assembly according to the present invention;
FIG. 2 shows a cross-sectional view of section A-A of FIG. 1;
FIG. 3 shows an enlarged view of section B of FIG. 1;
FIG. 4 is a view schematically illustrating a perspective view of a cross-sectional view of the portion C-C of FIG. 1;
fig. 5 is a schematic view showing a sampling inlet channel of a gas sampling apparatus according to the present invention.
Description of the main element symbols:
1-a gas sampling device; 100-a probe body; 110-a fan; 120-a measurement cavity; 130-annular valve core; 140-upper cover; 150-lower cover; 151-air intake; 152-air filter cotton; 160-measuring inlet; 170-fan inlet; 180-valve core hole; 190-measuring vent holes; 200-an electromagnet; 210-armature pull rod; 300-a flow guide light chopper; 310-a first conical inducer baffle; 320-second conical diversion shading plate; 400-filter screen one; 500-filter screen two; 600-wind pipe head; 610-an exhaust port; 620-exit protective net; 700-inner air duct; 710-an exhaust channel; 800-outer wind pipe; 810-sample air inlet; 820-sampling intake passage; 900-spiral deflector; 1000-baffle plate; 1100-circuit box.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 and 2, an embodiment of the present invention provides a gas sampling apparatus 1, which is mainly applied to the field of air monitoring. The gas sampling device 1 comprises a probe body 100, an inner air pipe 700, an outer air pipe 800, an annular valve core 130 and a fan 110.
Wherein, the spiral guide plate 900 is arranged on the outer cylindrical surface of the inner air duct 700, and a spiral groove is formed.
It should be noted that the spiral baffles 900 are at least one group. It is understood that the number of the spiral baffles 900 may be one, two or more groups of any number, and may be set according to the actual situation.
As shown in fig. 2 and 5, in some embodiments of the present invention, in order to improve the circulation rate of air and the blocking efficiency of oil drops in the air, three groups of spiral deflectors 900 are provided, and the three groups of spiral deflectors 900 are spaced from each other and form three spiral grooves on the outer cylindrical surface of the inner air duct 700.
As shown in fig. 2 and 5, in some embodiments of the present invention, in order to improve the compactness of the structure and the convenience of installation of the gas sampling apparatus 1, the inner air duct 700 is coaxially nested inside the outer air duct 800, a sampling air inlet channel 820 is formed in a cavity between the inner air duct 700 and the outer air duct 800, and an air outlet channel 710 is formed in an inner space of the inner air duct 700.
It should be noted that, three groups of spiral guide plates 900 which are spaced from each other are installed on the outer cylindrical surface of the inner air duct 700, and meanwhile, the inner air duct 700 is coaxially nested inside the outer air duct 800, so that a spiral labyrinth type sampling air inlet channel 820 is formed between the inner air duct 700 and the outer air duct 800. During sampling, oil smoke gas flows along the spiral groove, the flowing path of the oil smoke gas is prolonged, and micro oil drops in the oil smoke gas are more effectively adsorbed under the action of centrifugal force through the spiral labyrinth type sampling air inlet channel 820, so that the adsorption efficiency of the micro oil drops in the oil smoke gas is improved.
Through with outer tuber pipe 800 and interior tuber pipe 700 coaxial nestification, simultaneously will interior tuber pipe 700 with the one end of outer tuber pipe 800 is connected fixedly through tuber pipe head 600, interior tuber pipe 700 with the other end of outer tuber pipe 800 with probe body 100 is connected fixedly, has constituted sampling inlet channel 820 and exhaust passage 710, improves the compactness and the steadiness of gas sampling device 1 simultaneously.
Wherein, the middle part of the air pipe head 600 is provided with an air outlet 610, and the air outlet 610 is communicated with the air exhaust channel 710, for discharging the air in the air exhaust channel 710 through the air outlet 610.
As shown in fig. 2, in some embodiments of the present invention, the probe body 100 is provided with a measurement cavity 120, a measurement inlet channel 160, a fan inlet hole 170, and a spool hole 180.
The measurement cavity 120 is respectively communicated with the exhaust channel 710 and the measurement inlet channel 160, that is, the soot gas enters the measurement cavity 120 through the measurement inlet channel 160 and is then discharged through the exhaust channel 710.
In addition, the valve core hole 180 is communicated with the fan air inlet hole 170, the measurement air inlet 160 is communicated with the fan air inlet hole 170, and the fan 110 is arranged between the measurement air inlet 160 and the fan air inlet hole 170.
It is understood that the fan 110 is installed at the intersection of the air inlet of the fan 110 and the measurement air inlet 160, the air inlet of the fan 110 is opposite to the fan air inlet 170, and the air outlet of the fan 110 is opposite to the measurement air inlet 160. The fan 110 is a turbine fan 110, and the model of the turbine fan 110 can be specifically selected according to actual conditions.
The annular valve core 130 is slidably mounted in the valve core hole 180, and the annular valve core 130 is sleeved on the outer cylindrical surface of the inner air pipe 700, so that the annular valve core 130 slides in the valve core hole 180. It can be understood that the inner bore of the annular valve core 130 is in sliding fit with the outer cylindrical surface of the inner air pipe 700, and the outer cylindrical surface of the annular valve core 130 is in sliding fit with the valve core hole 180 of the probe body 100, so that the annular valve core 130 can slide left and right in the valve core hole 180.
Meanwhile, a sampling air inlet 810 is formed in the cylindrical surface of the outer air duct 800 close to the air duct head 600, and the sampling air inlet 810 is communicated with the sampling air inlet passage 820 and used for enabling oil smoke gas to enter the sampling air inlet passage 820 through the sampling air inlet 810.
It should be noted that, in some embodiments of the present invention, the number of the sampling gas inlets 810 is multiple, and the multiple sampling gas inlets 810 surround the cylindrical surface of the outer wind pipe 800 close to the wind pipe head 600 at intervals, so as to increase the amount of gas entering the sampling gas inlet passage 820 through the sampling gas inlets 810 in a unit time, and increase the sampling efficiency of the gas.
As shown in fig. 2 and 5, in some embodiments of the present invention, in order to further improve the adsorption efficiency of tiny oil drops in the sampled gas, baffles 1000 with staggered heights are disposed on the spiral groove, so that when the sampling device is used for sampling, the lampblack gas flows along the spiral groove, and changes direction in the diameter direction many times, forming a spiral labyrinth type sampling air inlet channel 820, thereby further improving the adsorption efficiency of tiny oil drops in the lampblack gas.
As shown in fig. 2 and fig. 3, in some embodiments of the present invention, the two ends of the inner air duct 700 are respectively provided with a diversion shutter 300, and the diversion shutter 300 is located in the exhaust channel 710, and is configured to block external light from entering the measurement cavity 120 through the diversion shutter 300, so as to improve accuracy of the measurement cavity 120 in a process of detecting lampblack gas.
The diversion light shield 300 is cylindrical, a first conical diversion light shield 310 and a second conical diversion light shield 320 with opposite vertex angles are arranged at two ends of the diversion light shield 300, the first conical diversion light shield 310 is arranged at an air inlet of the diversion light shield 300 and is opened at a conical small head, and the second conical diversion light shield 320 is arranged at an air outlet of the diversion light shield 300 and is opened at a conical large head to prevent external light from entering the measurement cavity 120 through the exhaust passage, so that the influence of the external light on measurement is prevented. Meanwhile, the conical diversion shade of the diversion shade 300 is also beneficial to reducing the wind resistance of the gas sampling device 1 during working, thereby improving the accuracy of detection.
As shown in fig. 2 and 3, in some embodiments of the present invention, a cylindrical filter screen 400 and a ring-shaped filter screen 500 are respectively installed in an outer air duct 800 of the sampling air inlet 810, and the oil smoke gas entering into the sampling air inlet channel 820 is filtered through the filter screen 400 and the filter screen 500 respectively, and micro oil droplets in the oil smoke gas are adsorbed, so that a precision loss of the measurement cavity 120 due to oil stain adhesion is reduced, and a service life of the gas sampling apparatus 1 is prolonged.
As shown in fig. 2 to 4, in some embodiments of the present invention, the probe body 100 includes an upper cover 140 and a lower cover 150, and the upper cover 140 is detachably mounted on the lower cover 150, and a circuit box 1100 is disposed on the top of the upper cover 140, so as to provide a space for mounting other circuit components for the soot probe through the circuit box 1100.
Wherein, a part of the outer cylindrical surface of the annular valve core 130 is used for closing or opening the air inlet hole 151 and the valve core hole 180. In addition, the annular end surface of the annular valve core 130 is used for closing or opening the sampling air inlet channel 820 and the valve core hole 180.
Specifically, when the air inlet hole 151 and the valve core hole 180 are closed in the process that the annular valve core 130 slides in the valve core hole 180, at this time, the sampling air inlet channel 820 is communicated with the valve core hole 180, and a lampblack sampling mode is formed. When the annular valve core 130 communicates the air inlet hole 151 with the valve core hole 180 in the process of sliding in the valve core hole 180, at this time, the sampling air inlet channel 820 and the valve core hole 180 are closed, and an air purging and calibration mode is formed.
Meanwhile, the electromagnet 200 is arranged on the annular end face of the valve core hole 180, and the armature pull rod 210 of the electromagnet 200 is connected with the annular valve core 130 and used for controlling the annular valve core 130 to slide in the valve core hole 180 through the electromagnet 200. When the electromagnet 200 is electrically attracted, the armature pull rod 210 drives the valve core to slide, so that the air inlet channel is closed, and the sampling air inlet channel 820 is opened. On the contrary, when the electromagnet 200 is de-energized, the annular valve core 130 closes the sampling air inlet passage 820 and opens the air inlet passage under the action of the spring of the electromagnet 200. The air outlet of the fan 110 is opposite to the measurement air inlet 160, and can pump air to the measurement hole.
It should be noted that the electromagnets 200 are at least one set, and it is understood that the electromagnets 200 may be one set, two sets, or two or more sets of any numerical values, and may be specifically set according to actual situations. In some embodiments of the present invention, two sets of electromagnets 200 are provided, and the two sets of electromagnets 200 are symmetrically installed on the annular end surface of the valve core hole 180, so as to improve the stability of the annular valve core 130 during sliding in the valve core hole 180 and reduce the cost.
In addition, in order to prevent large-particle impurity substances in the flue from entering the exhaust passage 710, an outlet protective net 620 is installed at the joint of the inner air pipe 700 and the air pipe head 600, so that the fluency of the exhaust passage 710 is improved.
It should be noted that, the implementation manner of the oil smoke sampling mode is as follows: the electromagnet 200 is electrically attracted, and the annular valve core 130 slides towards the electromagnet 200, so that the sampling air inlet passage 820 is opened and the air inlet passage is closed. The fan 110 is started, the oil smoke gas in the flue is sucked from the sampling air inlet 810, enters the measuring cavity 120 through the first filter screen 400, the second filter screen 500, the spiral labyrinth type sampling air inlet channel 820, the valve core hole 180, the fan air inlet 170, the fan 110 and the measuring air inlet 160, enters the inner air pipe 700 through the measuring air outlet 190 on the probe body 100, and finally is discharged to the flue through the diversion light chopper 300 and the outlet protective net 620. And the oil smoke gas flowing through the measurement cavity 120 is subjected to parameter measurement by a sensing measurement circuit in the measurement cavity 120.
The air purging and calibration mode is realized by the following steps: when the electromagnet 200 is de-energized, the annular valve core 130 slides away from the electromagnet 200, thereby closing the sampling air inlet passage 820 and opening the air inlet passage. The fan 110 is started, natural air outside the probe is sucked from the air inlet hole 151, passes through the air filter cotton 152, the valve core hole 180, the fan inlet hole 170, the fan 110 and the measurement inlet channel 160, enters the measurement cavity 120, enters the inner air pipe 700 through the measurement exhaust hole 190 on the probe body 100, and finally is discharged to a flue through the diversion shutter 300 and the outlet protective net 620. The sucked natural air firstly sweeps the residual oil smoke gas in the measuring cavity 120 to clean the measuring elements in the measuring cavity 120, and after sweeping is finished, the sensing and measuring circuit in the measuring cavity 120 can measure the parameters of the natural air which is continuously sucked, and provides calibration parameters related to the states of the environment and the sensor for the calculation of the oil smoke discharge concentration parameter. The cleaning of the measuring element can be ensured, and structural support is provided for realizing more flexible and accurate data measurement.
It will be appreciated that the measurement vent 190 communicates with the measurement cavity 120 and the vent passage 710, respectively, and that the measurement cavity 120 within the probe body 100 communicates with the vent passage 710 of the inner air tube 700 through the measurement vent.
In some embodiments of the present invention, as shown in fig. 2, in order to prevent the impurity substances in the air from entering the measurement chamber 120 when the gas sampling apparatus 1 enters the air purging and calibration mode, an air filter cotton 152 is disposed in the air inlet hole 151 for filtering the impurity substances in the air through the air filter cotton 152, so as to improve the quality of the air entering the measurement chamber 120.
The invention also provides an oil smoke probe, which comprises the oil smoke probe sampling device in any one of the embodiments.
In all examples shown and described herein, any particular value should be construed as merely exemplary, and not as a limitation, and thus other examples of example embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above examples are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (10)
1. A gas sampling device is characterized by comprising a probe body, an inner air pipe, an outer air pipe, an annular valve core and a fan;
the inner air pipe is coaxially nested inside the outer air pipe, a cavity between the inner air pipe and the outer air pipe forms a sampling air inlet channel, and the inner space of the inner air pipe forms an exhaust channel;
one ends of the inner air pipe and the outer air pipe are connected through an air pipe head, and the other ends of the inner air pipe and the outer air pipe are connected with the probe body;
a measuring cavity, a measuring air inlet channel, a fan air inlet hole and a valve core hole are arranged in the probe body;
the measuring cavity is respectively communicated with the exhaust channel and the measuring air inlet channel, the valve core hole is communicated with the fan air inlet hole, the measuring air inlet channel is communicated with the fan air inlet hole, and the fan is arranged between the measuring air inlet channel and the fan air inlet hole;
the annular valve core is slidably arranged in the valve core hole and is sleeved on the outer cylindrical surface of the inner air pipe;
the outer air pipe is provided with a sampling air inlet on the cylindrical surface close to the air pipe head, and the sampling air inlet is communicated with the sampling air inlet channel.
2. The gas sampling device of claim 1, wherein the spiral groove is provided with baffles which are staggered in height.
3. The gas sampling device of claim 1, wherein both ends of the inner air duct are provided with flow guide shutters, and the flow guide shutters are positioned in the exhaust passage;
the diversion light chopper is cylindrical, and a first conical diversion light shielding plate and a second conical diversion light shielding plate with opposite vertex angles are arranged at two ends of the diversion light chopper;
the first conical diversion shading plate is arranged at an air inlet of the diversion shading device and is opened at the small end of the cone;
the second conical diversion shading plate is arranged at an air outlet of the diversion shading device, and a hole is formed in the big end of the cone.
4. The gas sampling device according to claim 1, wherein a cylindrical filter mesh I and an annular filter mesh II are respectively installed in the outer air duct of the sampling air inlet.
5. The gas sampling device of claim 1, wherein the probe body comprises an upper cover and a lower cover;
the top of the upper cover is provided with a circuit box;
the bottom of the lower cover is provided with an air inlet hole, and one part of the outer cylindrical surface of the annular valve core is used for closing or opening the air inlet hole and communicated with the valve core hole.
6. The gas sampling device of claim 1, wherein the annular end surface of the annular valve plug is used for closing or opening the sampling air inlet channel to communicate with the valve plug hole.
7. The gas sampling device of claim 6, wherein an electromagnet is disposed on an annular end face of the valve core hole, and an armature pull rod of the electromagnet is connected with the annular valve core.
8. The gas sampling device of claim 5, wherein an air filter cotton is disposed within the air inlet aperture.
9. The gas sampling device of claim 1, wherein the inner air conduit is coaxial with the spool bore;
an outlet protective net is arranged at the joint of the inner air pipe and the air pipe head.
10. A fume probe comprising a gas sampling assembly according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111195846.1A CN113790935B (en) | 2021-10-14 | 2021-10-14 | Oil smoke probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN113790935B (en) | 2024-06-11 |
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