CN110702817B - Handheld portable air comprehensive detection equipment - Google Patents
Handheld portable air comprehensive detection equipment Download PDFInfo
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N30/60—Construction of the column
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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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 provides a hand-held portable air comprehensive detection device, which comprises: the device comprises a handheld part, a gas collection propulsion part, a separation part, a signal detection part, an electric power part, a data transmission part and an analysis terminal; the separation part is detachably connected with the handheld part, a channel is arranged in the separation part, the inlet end of the channel is communicated with the gas collection pushing part, and the outlet end of the channel is communicated with the signal detection part; the gas collecting and propelling component comprises a collecting cavity, a suction piece arranged outside the collecting cavity and a collecting bottle arranged in the collecting cavity; the gas flows unidirectionally from the suction piece to the collection bottle; the collecting bottle is communicated with the channel at a position close to the inlet end, and a second unidirectional control piece is arranged at the position of the inlet end; the signal detection part and the data transmission part are respectively and electrically connected with the power part, the signal detection part is in communication connection with the data transmission part, and the data transmission part is in communication connection with the analysis terminal. The problems of inconvenient carrying and insufficient electric power of the gas chromatograph in the prior art are solved.
Description
Technical Field
The invention relates to the field of chromatography, in particular to a handheld portable air comprehensive detection device.
Background
The gas chromatograph is a gas detection device for carrying out qualitative and quantitative analysis on a multi-component complex mixture by using chromatographic separation technology and detection technology, and generally consists of a gas circuit system, a sample injector, a chromatographic column, a detection system and an analysis system, wherein the gas circuit system is generally a gas steel bottle serving as a gas source, and gas circuit and pressure are applied to detected gas; the heart portion of the column chromatograph serves to separate the individual components of the sample; the detection system converts the concentration or quality of each component separated by the chromatographic column into an electric signal (such as voltage, current and the like) which is easy to measure, and a device for processing the signal is generally composed of a detection element, an amplifier and a digital-to-analog converter; the analysis system records the detection signal of the detector and performs quantitative data processing, typically a desktop computer. It can be seen that the equipment required for gas detection and analysis occupies a large area, requires stable power supply, and has certain requirements on a power system and a use space.
At present, in order to cope with the pollution and air detection of various jungle mountain areas, mine holes, airports, subways and other complex environments, the appearance of a portable rapid analysis and detection instrument is very necessary, but the system setting of the gas chromatograph is still not changed by the current portable gas chromatograph, the miniaturization of the portable gas chromatograph is also generally in a heavy box type structure, and the portable gas chromatograph still has the problems of inconvenient carrying and insufficient electric power in the places where inconvenient actions are carried out in mountain areas, mine holes, mountain areas, water areas and the like or the places where long walking distance is needed.
The invention with the bulletin number of CN 208188055U discloses a portable gas chromatograph, which comprises a box body, an upper cover, a first handle and the gas chromatograph, wherein the upper cover is connected to the left top end of the box body through a hinge, the first handle is welded at the center positions of the left side and the right side of the box body, the gas chromatograph main body is connected with the bottom end screw of the inner wall of the box body, the center positions of the front side and the rear side of the inner wall of the box body are all connected with one end of a first support plate through pin shafts, the left ends of the front side and the rear side of the inner wall of the box body are all connected with one end of a second support plate through pin shafts, the other ends of the first support plate and the second support plate are all connected with the second support plate through pin shafts, and the second rectangular support plate is positioned on the left side of the first support plate. This portable gas chromatograph can remove, but such setting still can't conveniently carry in occasions such as mountain region, mine cave, mountain area, waters, and the detection personnel is surmounted such equipment and is walked several kilometers mountain road and obviously unrealistic, and in reality, for detecting environmental data, often need detection personnel go deep into the complex environment and detect. Therefore, the invention does not well solve the problems of inconvenient carrying and insufficient electric power of the gas chromatograph in the prior art.
Disclosure of Invention
The invention aims to solve the problems that a gas chromatograph in the prior art is inconvenient to carry and has insufficient electric power in a severe environment. The use of electric power is reduced to the maximum degree through the combination of machinery and electronic equipment, the effect of saving electricity is achieved, and meanwhile, the volume is reduced through simplifying the necessary parts detected by chromatographic instruments in the severe environment, and the effect of carrying by hand is achieved.
In order to solve the technical problems, an embodiment of the invention discloses a handheld portable air comprehensive detection device, which is characterized by comprising: the device comprises a handheld part, a gas collection propulsion part, a separation part, a signal detection part, an electric power part, a data transmission part and an analysis terminal; wherein the gas collecting and pushing component, the separating component, the signal detecting component, the power component and the data transmitting component are arranged on the handheld part; the separation part is detachably connected with the handheld part, a passage which is bent in a retrace way is arranged in the separation part, the inlet end of the passage is communicated with the gas collection pushing part, the outlet end of the passage is communicated with the signal detection part, and a gas chromatography stationary phase is arranged in the passage; the gas collecting and propelling component comprises a collecting cavity, a suction piece arranged outside the collecting cavity and a collecting bottle arranged in the collecting cavity; the suction piece is communicated with the collecting bottle, a first unidirectional control piece is arranged on a gas path between the collecting bottle and the suction piece, and gas flows unidirectionally from the suction piece to the collecting bottle; the collecting bottle is communicated with the channel at a position close to the inlet end, and a second unidirectional control piece for controlling gas to flow from the collecting bottle to the channel is arranged at the position of the inlet end, and a control part of the second unidirectional control piece extends to the outside of the collecting cavity; the signal detection part and the data transmission part are respectively and electrically connected with the power part, the signal detection part is in communication connection with the data transmission part, and the signal detection part converts the material information flowing into the data transmission part from the channel into an electric signal and transmits the electric signal to the data transmission part; the data transmitting part is in communication connection with the analysis terminal, and the analysis terminal analyzes the substance information detected by the signal detecting part.
By adopting the technical scheme, the gas collection and pushing component with a simple mechanical structure is used for replacing a heavy gas steel cylinder to realize gas collection and gas pressure formation, the gas is pushed into the separation component to carry out chromatographic separation, and finally, the signal detection component sends the detected gas signal to the analysis terminal through the data sending component. The hand-held part reduces the setting of the device needing electricity as much as possible, the process of data analysis and calculation is completed by another analysis terminal, thus the electric power of the hand-held part can be saved to the greatest extent, and meanwhile, the portability is greatly improved, because the air detection has the difficulty in collecting and separating the sample mixture, under the condition that the sample is not well preserved, the detection personnel only need to collect and separate the sample in a complex environment, the process of preserving the sample is converted into the preservation of the data, then only the data is needed to be sent, the analysis terminal is matched for analysis to obtain the result, the bearing and complex analysis terminal is separated from the collecting and separating part, the miniaturization and portability of the gas chromatograph are realized, the detection personnel can carry out the detection in the external environment by hand, and the problem that the air quality cannot be measured in the complex environment is solved.
According to another specific embodiment of the invention, the handheld portable air comprehensive detection device disclosed by the embodiment of the invention comprises a cylinder body arranged on the outer wall of the collection cavity, a pushing rod arranged in the cylinder body and a concave piston arranged on the pushing rod, wherein a gap capable of accommodating deformation of the concave piston due to pressure change is reserved between the concave piston and the inner wall of the cylinder body, and a notch of the concave piston faces to one side close to the second unidirectional control piece.
By adopting the technical scheme, the gas flows unidirectionally through the second unidirectional control piece, and the pushing rod pushes the concave piston to enable the collecting bottle to enter air and increase the pressure in the collecting bottle. The device has the advantages of simple structure, convenient operation, capacity of realizing gas collection and pressurization without using electric power, reduced volume of electric power components, omission of circuit arrangement, realization of gas collection and pressurization by using a simple mechanical mechanism, more favorability for complex environment, avoidance of circuit damage, no electricity and other conditions, and capability of solving the problems of inconvenient carrying and insufficient electric power of the complex environment.
According to another specific embodiment of the invention, the handheld portable air comprehensive detection device disclosed by the embodiment of the invention comprises a blowing ball arranged on the outer wall of the collection cavity, and a third unidirectional control piece is arranged at the position of an air inlet on the blowing ball.
By adopting the technical scheme, the air flows unidirectionally through the third unidirectional control piece, and the air is generated by extruding the air blowing ball arranged on the outer wall of the collecting cavity to enable the air to enter the collecting bottle and increase the pressure in the collecting bottle. The device has the advantages of simple structure, convenient operation, capacity of realizing gas collection and pressurization without using electric power, reduced volume of electric power components, omission of circuit arrangement, realization of gas collection and pressurization by using a simple mechanical mechanism, more favorability for complex environment, avoidance of circuit damage, no electricity and other conditions, and capability of solving the problems of inconvenient carrying and insufficient electric power of the complex environment.
According to another embodiment of the invention, the portable air comprehensive detection device disclosed by the embodiment of the invention further comprises a fan, wherein the fan is electrically connected with the power component.
By adopting the technical scheme, the air is conveyed to the collecting bottle through the fan, and the pressure air in the collecting bottle is increased to continuously input air by using the fan, so that the air inlet efficiency is higher than that of a manual control machine, the air inlet process is more uniform, and the effects of stable input pressure and high input efficiency are achieved.
According to another specific embodiment of the invention, the handheld portable air comprehensive detection device disclosed by the embodiment of the invention further comprises a pressure gauge which is displayed on the outer wall of the collection cavity and reflects the pressure in the collection bottle.
By adopting the technical scheme, the pressure gauge can help control the air inlet pressure, and is beneficial to the stable flow of the gas.
According to another specific embodiment of the invention, the handheld portable air comprehensive detection device disclosed by the embodiment of the invention further comprises an electric control component electrically connected with the electric power component, and the electric control component controls the fan to pressurize according to the pressure gauge.
By adopting the technical scheme, the fan continuously pressurizes the gas transmission of the gas collection bottle according to pressurization of the pressure gauge, the unstable pressure condition caused by manual control can be avoided through the electric control part, and the embodiment is applicable to a scene requiring continuous sample injection.
According to another embodiment of the present invention, a hand-held portable air comprehensive detection device is disclosed in the embodiment of the present invention, and the communication connection mode between the data transmission unit and the analysis terminal includes wireless connection.
By adopting the technical scheme, the analysis result can be obtained in real time by wirelessly transmitting data in real time.
According to another embodiment of the present invention, a hand-held portable air integrated detection device is disclosed in an embodiment of the present invention, the separation member is a gas chromatography packing block, and the channel is constituted by a groove formed inside the gas chromatography packing block.
By adopting the technical proposal, the groove of the gas chromatography filling block can be used for filling the chromatography filling material, the mode has better stability,
according to another specific embodiment of the invention, the embodiment of the invention discloses a handheld portable air comprehensive detection device, the separation component is a capillary gas chromatography block, and the channel is a quartz capillary chromatographic column embedded in the capillary gas chromatography block.
By adopting the technical scheme, the capillary chromatographic column has higher theoretical plate number and better separation effect, and can provide more theoretical plates in a smaller space to realize the separation of complex samples.
According to another embodiment of the invention, a hand-held portable air comprehensive testing device is disclosed, wherein the collection bottles comprise at least two collection bottles, and each collection bottle is respectively communicated with the suction piece and the channel.
By adopting the technical scheme, the samples in different collecting bottles 23 can be independently detected, namely repeated experiments are performed for verification.
Drawings
FIG. 1 is a schematic diagram of a portable air comprehensive detection device in a hand-held embodiment of the invention;
FIG. 2 is an enlarged view of a portion of a gas collection propulsion unit of a hand-held portable air comprehensive test apparatus in accordance with an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of a gas collection propulsion unit of another hand-held portable air comprehensive test apparatus in accordance with an embodiment of the present invention;
fig. 4 is a schematic structural view of another hand-held portable air comprehensive testing apparatus according to an embodiment of the present invention.
Reference numerals illustrate:
1: a hand-held part; 2: a gas collection propulsion component; 21: a collection chamber; 211: a first unidirectional control member; 22: a suction member; 221: a cylinder; 2211: a propulsion rod; 2212: a concave piston; 222: a balloon; 2221: an air inlet; 2222: a third unidirectional control member; 23: a collection bottle; 24: a pressure gauge; 3: a separation member; 31: a channel; 311: a gas chromatography stationary phase; 32: an inlet end; 321: a second unidirectional control member; 33: an outlet end; 4: a signal detection section; 5: a power component; 6: and a data transmission section.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present invention with specific examples. While the description of the invention will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the invention described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the invention. The following description contains many specific details for the purpose of providing a thorough understanding of the present invention. The invention may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the invention. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present embodiment, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present invention.
The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present embodiment can be understood in a specific case by those of ordinary skill in the art.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
An energy saving glass according to a specific embodiment of the present invention is described below with reference to the accompanying drawings.
In order to solve the above technical problems, an embodiment of the present invention discloses a handheld portable air comprehensive detection device, as shown in fig. 1, including: a hand-held part 1, a gas collection propulsion part 2, a separation part 3, a signal detection part 4, an electric power part 5, a data transmission part 6 and an analysis terminal; wherein the gas collecting and pushing part 2, the separating part 3, the signal detecting part 4, the power part 5 and the data transmitting part 6 are arranged on the hand-held part 1; the separation part 3 is detachably connected with the hand-held part 1, a passage 31 which is bent in a folding way is arranged in the separation part 3, an inlet end 32 of the passage 31 is communicated with the gas collecting and pushing part 2, an outlet end 33 is communicated with the signal detection part 4, and a gas chromatography stationary phase 311 is arranged in the passage 31; the gas collecting and pushing component 2 comprises a collecting cavity 21, a suction piece 22 arranged outside the collecting cavity 21 and a collecting bottle 23 arranged in the collecting cavity 21; the suction piece 22 is communicated with the collection bottle 23, a first unidirectional control piece 211 is arranged on a gas path between the collection bottle 23 and the suction piece 22, and gas flows unidirectionally from the suction piece 22 to the collection bottle 23; the collection bottle 23 communicates with the channel 31 at a position close to the inlet end 32, and a second unidirectional control member 321 for controlling the flow of gas from the collection bottle 23 to the channel 31 is arranged at the position of the inlet end 32, and a control part of the second unidirectional control member 321 extends to the outside of the collection cavity 21; the signal detecting section 4 and the data transmitting section 6 are electrically connected to the power section 5, respectively, the signal detecting section 4 is communicatively connected to the data transmitting section 6, and the signal detecting section 4 converts the substance information flowing from the channel 31 into an electric signal to transmit to the data transmitting section 6; the data transmission section 6 is communicatively connected to an analysis terminal, and the analysis terminal analyzes the substance information detected by the signal detection section 4.
Specifically, the hand-held part 1 may be a base of a hand-held portable air integrated detection device, and may be a cubic or circular box-shaped hand-held device, or may be a shape formed by a handle and a portion for supporting other components as in fig. 1, and the present embodiment is not particularly limited as long as the shape is favorable for carrying by hand-holding and has a stable mechanical structure.
More specifically, the gas collecting and pushing component 2 plays a role of collecting gas and providing gas pressure for the hand-held portable air comprehensive detection device so that the gas can smoothly pass through the separating component 3, namely, plays a role of a gas carrying bottle and a sample inlet in a common gas chromatograph. The suction piece 22 is used for actively sucking air for sampling and compressing, on one hand, the concentration of an air sample is increased to enable the response of the detection component 4 to be clearer, on the other hand, the suction piece 22 is matched with the first unidirectional control piece 211 and the second unidirectional control piece 321 to enable the collecting bottle 23 to be pressurized, the first unidirectional control piece 211 controls gas to enter the collecting bottle 23 only from the suction piece 22, under the condition that the second unidirectional control piece 321 is closed, the second unidirectional control piece 321 is opened after the collecting bottle 23 is pressurized by certain air pressure by introducing the gas, so that the sample smoothly passes through the separation component 3, in the embodiment, the suction piece 22 can be an air pump or a mechanically added device capable of unidirectional gas collection such as an air cylinder or an air bag, and the embodiment is not limited specifically. The collection bottle 23 serves as a sampling bottle for holding a sample, and serves as a pressurizing chamber for pressurizing the gas collection. The first unidirectional control member 211 and the second unidirectional control member 321 may be devices such as a unidirectional valve or a unidirectional valve, and play a role in unidirectional movement of gas, wherein the specific meaning that the control portion of the second unidirectional control member 321 extends to the outside of the collection cavity 21 means that the control portion of the second unidirectional control member 321 extends to the outside of the collection cavity 21, for example, the second unidirectional control member 321 is a unidirectional valve, and a user of the switch of the unidirectional valve outside the collection cavity 21 can control the second unidirectional control member 321 to be opened or closed outside the collection cavity 21. The collecting cavity 21 serves as a shell for accommodating the collecting bottle 23, and plays a role of protecting and fixing the collecting bottle 23 and the suction piece 22, and the collecting cavity 21 and the hand-held part 1 can be in a non-detachable connection mode such as riveting or welding, or in a detachable connection mode such as threaded connection or clamping connection.
More specifically, the separation component 3 is a core component of the hand-held portable air comprehensive detection device, and has the function equivalent to a chromatographic column in a common gas chromatograph, and is used for separating gas, so that different substances mixed in the gas can be separated and then respectively responded by the detection component 4. In the present embodiment, the detachable connection between the separation member 3 and the hand-held unit 1 may be a snap connection, a screw connection, or the like. The separation member 3 is internally provided with a passage 31 which is bent back, the bent back enables the passage 31 occupying a unit volume to obtain a longer total length, the further passage 31 can be directly filled with the gas chromatography stationary phase 311, the passage 31 itself can be used as a chromatographic column, or a capillary chromatographic column can be arranged in the separation member 3, a hollow passage of the gas chromatography column is used as the passage 31, and the gas chromatography stationary phase 311 is smeared on the inner surface of the passage 31. The gas chromatography stationary phase 311 in the channel 31 can be selected to be different stationary phases according to different detection gases, for example, a GDX porous high polymer chromatography stationary phase or PEG polyethylene glycol stationary phase is selected to be equal.
More specifically, the signal detecting part 4 is a part of the hand-held portable air comprehensive detecting device that functions to detect a signal of a gas sample, the signal detecting part 4 may be a semiconductor gas sensor such as a tin oxide semiconductor or a titanium dioxide volume control type sensing material, an electrochemical gas sensor such as a primary cell type gas sensor, a gas sensor that can respond to a gas substance without heating such as an infrared gas sensor, that is, the signal detecting part 4 may be various detecting devices commonly used in the prior art, and the specific model thereof may be selected according to design requirements, and the embodiment is not limited specifically.
The power component 5 is a lithium battery or other battery that converts chemical energy as is commonly used by those skilled in the art. The data transmitting unit 6 may be a communication data transmitting device having a wireless function such as a bluetooth or WiFi function, and may be connected to the analysis terminal in a wireless manner, or may be a simple storage chip such as an SD card, which stores the detection signal of the detection unit 4, and then cooperates with the analysis terminal to read data, or may be a socket such as a USB, and is connected to the analysis terminal in a communication manner via a data line to read data. The analysis terminal in this embodiment may be a mobile terminal having a data reading and calculating function, such as a tablet PC, or a non-mobile terminal having a data reading and calculating function, such as a PC.
When the portable air comprehensive detection device is used, the gas collection propulsion component 2 with a simple mechanical structure is used for replacing a heavy gas steel cylinder and a sample injector to realize gas collection and gas pressure formation, the gas is pushed into the separation component 3 to carry out chromatographic separation, and finally, the signal detection component 4 sends detected gas signals to an analysis terminal through the data sending component 6. The hand-held part reduces the setting of devices needing electricity as much as possible, meanwhile, the process of data analysis and calculation is completed by another analysis terminal, thus the electric power of the hand-held part can be saved to the greatest extent, the portability is improved greatly, the air detection has the difficulty that under the condition that the sample is not well preserved, the detection personnel only need to collect and separate the sample in a complex environment and convert the gas sample information into data information or electric signal information, then only need to send or save the data, the analysis terminal needed in the analysis process can be carried out after leaving from the environment to be detected, the bearing and complex analysis terminal is separated from the collecting and separating part, the miniaturization and portability of the gas chromatograph are realized, the detection personnel can carry out detection in the external environment, and the problem that the air quality can not be measured in the complex environment is solved.
As a preferred embodiment of the present invention, as shown in fig. 2, the suction member 22 includes a cylinder 221 provided at an outer wall of the collection chamber 21, a push rod 2211 provided in the cylinder, and a concave piston 2212 provided on the push rod 2211, a space is left between the concave piston 2212 and an inner wall of the cylinder 221, which can accommodate deformation of the concave piston 2212 due to pressure variation, and a recess of the concave piston 2212 is directed toward a side close to the second one-way control member 321.
Specifically, there is a gap between the concave piston 2212 in the cylinder 221 and the inner wall of the cylinder 221, when the push rod 2211 is pulled to draw out the concave piston 2212, the air volume between the concave piston 2212 and the bottom of the cylinder 221 increases, the pressure decreases, and the air in the drawing direction of the concave piston 2212 is extruded from the periphery of the concave piston 2212 to the lower side. Then, the push rod 2211 is pressed to move the concave piston 2212 toward the bottom of the cylinder 221, the air volume between the concave piston 2212 and the bottom of the cylinder 221 is reduced, the pressure is increased, the concave piston 2212 is deformed, the edge of the deformed concave piston 2212 is tightly abutted against the inner wall of the cylinder 221, the air is not leaked above the piston, the concave piston 2212 is continuously pressed toward the bottom of the cylinder 221, and when the air pressure is enough to push the first unidirectional control piece 211 open, the compressed air enters the collecting bottle 23.
With the above technical solution, the gas is pressurized by closing the second unidirectional control member 321 to flow unidirectionally to the collection bottle 23, and the pushing rod 2211 pushes the concave piston 2212 to let the collection bottle 23 into the air while increasing the pressure in the collection bottle 23. The device has the advantages of simple structure and convenient operation, can realize the collection and pressurization of gas without using electric power, reduces the volume of the electric power component 5 which is required to be increased for keeping the electric power, omits the arrangement of a circuit, realizes the collection and pressurization of gas by using a simple mechanical mechanism, is more beneficial to the use of complex environments, avoids the occurrence of the conditions of circuit damage, no electricity and the like, and solves the problems of inconvenient carrying and insufficient electric power of the complex environments.
As a preferred embodiment of the present invention, as shown in fig. 3, the suction member 22 includes an air-blowing ball 222 provided at an outer wall of the collecting chamber 21, and a third one-way control member 2222 is provided at a position of an air inlet 2221 on the air-blowing ball 222.
Specifically, the third unidirectional control member 2222 may be a valve core or a unidirectional valve, and the air balloon 222 is pressed to enable the air therein to flow towards the collecting bottle 23, so that the air can only enter the collecting bottle 23 from the third unidirectional control member 2222 through the first unidirectional control member 211 when the air balloon 222 sucks air, and the air is generated by pressing the air balloon 222 arranged on the outer wall of the collecting cavity 21 to enable the air to enter the collecting bottle and increase the pressure in the collecting bottle. The device has the advantages of simple structure, convenient operation, capacity of realizing gas collection and pressurization without using electric power, capacity of reducing the volume of the electric power component 5, circuit arrangement omission, realization of gas collection and pressurization by using a simple mechanical mechanism, convenience in use of complex environments, circuit damage and no electricity and the like, and capability of solving the problems of inconvenient carrying and insufficient electric power of the complex environments.
As a preferred embodiment of the invention, the suction piece 22 further comprises a fan, which is electrically connected to the power unit 5.
Specifically, the fan in this embodiment may be a ventilator, a blower or a compressor, and may be a centrifugal or positive displacement gas compression and delivery machine, for example, a D100 centrifugal blower or an MCL centrifugal compressor, which is not specifically limited, and may be selected by those skilled in the art according to design requirements. The electric power part 5 drives the fan to work, the sucked air flows to the collecting bottle 23, and the fan can increase the density and the pressure of the air when continuously working. The fan can continuously input air, and has higher air inlet efficiency and more uniform air inlet process than manual control machinery, so as to achieve the effects of stable input pressure and quick input efficiency.
Further, as a preferred embodiment of the present invention, as shown in fig. 4, a pressure gauge 24 is further included, which is shown at the outer wall of the collection chamber 21, and the pressure gauge 24 reflects the pressure in the collection bottle 23.
Specifically, the pressure gauge 24 may be a conventional spring tube pressure gauge, a digital pressure gauge using a semiconductor pressure sensor, or the like, as long as the pressure in the collection bottle 23 can be measured and displayed and the dial or display portion is located on the outer wall of the collection chamber 21 for easy observation, such as a MY-YBS-WB type or Y60 type pressure gauge, or the like.
By adopting the technical scheme, the pressure gauge 24 can help control the air inlet pressure, and is helpful for controlling the stable flow of the gas.
Further, as a preferred embodiment of the present invention, as shown in fig. 4, an electric control part electrically connected to the electric power part is further included, and the electric control part controls the fan pressurization according to the pressure gauge 24.
Specifically, the electric control component is a microcomputer chip commonly used in the prior art, in this embodiment, the pressure gauge 24 is a digital pressure gauge of a semiconductor pressure sensor, the electric control component is in communication connection and electric connection with the pressure gauge 24, and a microcomputer in the electric control component is set first, and the microcomputer controls the fan switch according to signals of the pressure gauge 24. The fan continuously pressurizes the gas collection bottle 23 according to the pressurization of the pressure gauge 24, and the unstable pressure condition caused by manual control can be avoided through the electric control part, and the embodiment is suitable for a scene needing continuous sample injection.
As a preferred embodiment of the present invention, the communication connection between the data transmission unit 6 and the analysis terminal includes wireless connection.
Specifically, the wireless connection mode may be a wireless connection mode commonly used by those skilled in the art, such as bluetooth connection or WIFI hotspot connection. It should be understood that the data transmitting unit 6 may select a corresponding hardware module according to a specific wireless connection manner and design requirements. Thus, the data can be transmitted wirelessly in real time, and the analysis result can be obtained from the analysis terminal in real time.
As a preferred embodiment of the present invention, the separation member 3 is a gas chromatography packing block, and the passage 31 is constituted by a groove formed inside the gas chromatography packing block.
Specifically, the groove of the gas chromatography packing block is the channel 31 for filling the chromatography packing, so that the channel 31 is used as a chromatographic column, at the moment, glass fibers or plugs commonly used in the production of the gas chromatography packing column by the technology in the field are arranged at two ends of the channel 31 to prevent the packing as the gas chromatography stationary phase 311 from being sprayed out, it is understood that the groove of the gas chromatography packing block is generally 2-5mm in diameter so as to be convenient for packing the packing, at the moment, the packing as the gas chromatography stationary phase 311 is generally powdery substance, such as porous polymer, molecular sieve, and the like.
As a preferred embodiment of the present invention, the separation member 3 is a capillary gas chromatography block, and the channel 31 is a quartz capillary chromatography column embedded inside the capillary gas chromatography block.
Specifically, a relatively thin groove is formed in the separation member 3, and then a capillary chromatographic column is inserted therein, the hollow portion of the capillary chromatographic column substantially forms the channel 31, and the gas chromatographic stationary phase 311 is smeared on the inner surface of the channel 31. It should be understood that the capillary chromatographic column is generally a hollow quartz glass column tube, the diameter of the column tube is generally less than 1mm, and the gas chromatographic stationary phase 311 is smeared on the inner surface of the column tube to realize gas separation, and the film thickness of the gas chromatographic stationary phase 311 smeared in the capillary chromatographic column is generally 0.1-5 μm, for example, polyethylene glycol stationary phase or polysiloxane.
The quartz capillary chromatographic column has higher theoretical plate number and better separation effect, and can provide more theoretical plates in smaller space to realize the separation of complex samples.
As a preferred embodiment of the invention, the collection bottles 23 comprise at least two, each collection bottle 23 being in communication with the suction piece 22 and the channel 31, respectively.
Specifically, the collection bottles 23 are disposed in the collection cavity 21, the collection bottles 23 are communicated with the suction piece 22 through a plurality of pipelines converging on one path, the first unidirectional control piece 211 is disposed on a part converging on one path and can be disposed on each branch respectively, the collection bottles 23 are respectively communicated with the channel 31, and a second unidirectional control piece 321 is disposed on each branch communicated with the channel 31.
In use, the sample in the different collection vials 23 can be tested independently, i.e., repeated experiments can be performed for verification.
While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the invention with reference to specific embodiments, and it is not intended to limit the practice of the invention to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present invention.
Claims (9)
1. A hand-held portable air comprehensive testing device, comprising: the device comprises a handheld part, a gas collection propulsion part, a separation part, a signal detection part, an electric power part, a data transmission part and an analysis terminal; wherein,,
the gas collection propulsion means, the separation means, the signal detection means, the power means, and the data transmission means are provided on the hand-held portion;
the separation part is detachably connected with the handheld part, a passage which is bent in a retrace way is arranged in the separation part, the inlet end of the passage is communicated with the gas collecting and pushing part, the outlet end of the passage is communicated with the signal detection part, and a gas chromatography stationary phase is arranged in the passage;
the gas collecting and pushing component is handheld portable air comprehensive detection equipment, plays roles of collecting gas, providing gas pressure and pushing the gas into the separating component for chromatographic separation, and comprises a collecting cavity, a suction piece arranged outside the collecting cavity and a collecting bottle arranged in the collecting cavity; and, in addition, the processing unit,
the suction piece is used for sampling and compressing and is communicated with the collecting bottle, a first unidirectional control piece is arranged on a gas path between the collecting bottle and the suction piece, and gas flows unidirectionally from the suction piece to the collecting bottle;
the collecting bottle is communicated with the channel at a position close to the inlet end, and a second unidirectional control piece for controlling gas to flow from the collecting bottle to the channel is arranged at the position of the inlet end, and a control part of the second unidirectional control piece extends to the outside of the collecting cavity;
the signal detection part and the data transmission part are respectively and electrically connected with the power part, the signal detection part is in communication connection with the data transmission part, the signal detection part converts the information of the substances flowing into the channel from the channel into electric signals and transmits the electric signals to the data transmission part, and the signal detection part is a semiconductor gas sensor, an electrochemical gas sensor or an infrared gas sensor;
the data transmitting part is in communication connection with the analysis terminal, and the analysis terminal analyzes the substance information detected by the signal detecting part;
the communication connection mode of the data transmission part and the analysis terminal is wireless connection; wherein the method comprises the steps of
The suction piece is matched with the first unidirectional control piece and the second unidirectional control piece to pressurize the collecting bottle, and when the second unidirectional control piece is closed, gas is introduced to enable the collecting bottle to accumulate certain air pressure, then the second unidirectional control piece is opened to enable a sample to smoothly pass through the separation part, and the collecting bottle serves as a sampling bottle to accommodate the sample on one hand and serves as a pressurizing cavity to enable the gas to gather and pressurize on the other hand; the user controls the second unidirectional control piece to open or close outside the collection cavity.
2. The hand-held portable air comprehensive detection device according to claim 1, wherein the suction piece is composed of a cylinder body arranged on the outer wall of the collection cavity, a pushing rod arranged in the cylinder body and a concave piston arranged on the pushing rod, a gap capable of accommodating deformation of the concave piston due to pressure change is reserved between the concave piston and the inner wall of the cylinder body, and a notch of the concave piston faces to one side close to the second unidirectional control piece.
3. The hand-held portable air comprehensive testing device according to claim 1, wherein the suction piece is a balloon arranged on the outer wall of the collection cavity, and a third unidirectional control piece is further arranged on the position of an air inlet on the balloon.
4. The hand-held portable air comprehensive testing apparatus according to claim 1, wherein the suction member is a blower, the blower being electrically connected to the electrical component.
5. The portable, handheld, air-integrated test device of claim 4, further comprising a pressure gauge positioned on an outer wall of the collection chamber, the pressure gauge reflecting pressure within the collection bottle.
6. The portable, handheld, air-integrated test device of claim 5, further comprising an electrical control component electrically connected to the electrical power component, the electrical control component controlling pressurization of the blower based on the pressure gauge.
7. A hand-held portable air comprehensive testing apparatus according to claim 1, wherein the separating member is a gas chromatography packing block and the channel is constituted by a groove formed inside the gas chromatography packing block.
8. The hand-held portable air comprehensive testing apparatus according to claim 1, wherein the separation member is a capillary gas chromatography block and the channel is a quartz capillary chromatography column embedded inside the capillary gas chromatography block.
9. A hand-held portable air comprehensive testing apparatus according to claim 1 wherein said collection bottles comprise at least two, each of said collection bottles being in communication with said suction piece and said channel, respectively.
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| CN111398528B (en) * | 2020-04-01 | 2022-08-23 | 湖南鼎誉检验检测股份有限公司 | Portable air detection system for environmental improvement |
| CN113804511A (en) * | 2020-05-29 | 2021-12-17 | 同方威视技术股份有限公司 | Handheld gas sampling device and gas detection system |
| CN112730761B (en) * | 2021-02-09 | 2023-02-17 | 河北名华质检技术服务有限公司 | Detection equipment and detection method applied to air detection anti-pollution prediction |
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