CN215525680U - Calibrating device for expired gas alcohol content detector - Google Patents
Calibrating device for expired gas alcohol content detector Download PDFInfo
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- CN215525680U CN215525680U CN202120535533.5U CN202120535533U CN215525680U CN 215525680 U CN215525680 U CN 215525680U CN 202120535533 U CN202120535533 U CN 202120535533U CN 215525680 U CN215525680 U CN 215525680U
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Abstract
The utility model provides a calibrating device for an alcohol content detector of exhaled gas, which comprises an alcohol generator thermostat, a conveying pipeline thermostat and a gas mixing chamber thermostat, wherein an alcohol generator is arranged inside the alcohol generator thermostat, a plurality of conveying pipelines are arranged inside the conveying pipeline thermostat, a gas mixing chamber is arranged inside the gas mixing chamber thermostat, an air inlet and a nitrogen inlet are arranged outside the conveying pipeline thermostat, the air inlet is connected to the gas mixing chamber through one conveying pipeline, the nitrogen inlet is sequentially connected to the alcohol generator and the gas mixing chamber through the other conveying pipeline, and an alcohol content detector is arranged at the outlet of the gas mixing chamber. The utility model can continuously generate alcohol gas with continuous concentration in the air by diluting the alcohol gas carried out, has high preparation efficiency, and has higher detection precision because the temperature of the alcohol gas in the air is controlled when the alcohol gas content detector of the exhaled air is detected.
Description
Technical Field
The utility model relates to the field of detection of alcohol content in gas, in particular to a calibrating device for an alcohol content detector in exhaled gas.
Background
The ethanol is commonly called alcohol, and the main component in the white spirit is ethanol. The expired air alcohol content detector is an instrument for detecting the alcohol content in the expired air of a driver on site, and is one of tools for a traffic police to judge whether the driver drives against rules after drinking.
At present, a calibrating device for an expired gas alcohol content detector mainly adopts a gravimetric method, a moisture gas distribution method and an injection method when preparing an ethanol gas standard substance, wherein the gravimetric method has the following technical problems when preparing the ethanol gas standard substance in the air due to the physical and chemical properties of ethanol: (1) the high-pressure gas bottle package is prepared by adopting a conventional weight method, high concentration is not easy to vaporize completely, low concentration is easy to be adsorbed by pipelines, bottle walls, valve bodies and the like, the saturated vapor pressure of ethanol gas is easy to liquefy, particularly, the higher the concentration is, the higher the pressure is, ethanol standard gas is, and if partial ethanol gas in the high-pressure gas bottle is liquefied, the concentration of standard gas finally flowing out of the gas bottle is lower. In order to prevent the liquefaction of the ethanol standard gas, certain requirements are imposed on the environmental temperature in the transportation, storage and use processes; (2) the preparation cost of the ethanol standard gas is high, the ethanol standard gas belongs to dangerous chemicals, long-distance transportation is inconvenient, the transportation cost is high, and the consumed time is long; (3) the temperature of the ethanol gas cylinder is not well controlled, so that the exhalation characteristic of the ethanol gas cylinder is different from that of a human body to a certain extent, and the accuracy of a verification result is influenced.
Moisture gas distribution method at the time of formulation: it is known that an alcohol aqueous solution of a certain volume and concentration generates a gas of a certain concentration in a gas-liquid equilibrium state, and the concentration is kept constant for a certain period of time, and the alcohol aqueous solution can be used for continuously detecting and calibrating an instrument. After the time is exceeded, alcohol must be added again and the balance is re-balanced to produce the desired concentration of alcohol gas. Therefore, the alcohol gas in the air prepared by the method has poor reproducibility and efficiency.
When preparing alcohol gas in air by an injection method, firstly, a micro-injector is required to accurately extract a certain amount of alcohol liquid, the alcohol liquid is injected into a heated injection port to vaporize the alcohol liquid, and simultaneously, the vaporized alcohol gas is carried into an air storage bag by a certain amount of air to be stored under the control of a mass flow meter and a timer. When the method is used, the alcohol gas in the method is discharged through manual extrusion, and the method is extremely low in efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a calibrating device for an expired gas alcohol content detector, which can continuously generate alcohol gas in air with continuous concentration by diluting the alcohol gas carried out, has high preparation efficiency, and has higher calibration precision due to the control of the temperature of the alcohol gas in the air when the expired gas alcohol content detector is used for detecting.
In order to achieve the purpose, the utility model adopts the technical scheme that:
the utility model provides an expired gas alcohol content testing appearance calibrating installation, includes ethanol generator thermostated container, conveying line thermostated container and gas mixing chamber thermostated container, its characterized in that: the inside of ethanol generator thermostated container is provided with ethanol generator, the inside of conveying line thermostated container is provided with many conveying line, the inside of gas mixing chamber thermostated container is provided with gas mixing chamber, the outside of conveying line thermostated container is provided with air inlet and nitrogen gas entry, wherein, air inlet passes through air conveying line and is connected to the gas mixing chamber, nitrogen gas entry passes through nitrogen gas conveying line and is connected to ethanol generator, simultaneously, nitrogen gas entry is connected to the ethanol liquid storage pot through the pressurization pipeline, ethanol generator's discharge port passes through many ethanol conveying pipe intercommunication gas mixing chambers, the exit position of gas mixing chamber sets up the alcohol content detector.
The nitrogen conveying pipeline is sequentially provided with a mass flow meter II and a solenoid valve II, the head end of the pressurizing pipeline is connected to a pipeline between the mass flow meter II and the solenoid valve II, the tail end of the pressurizing pipeline is connected to a supply port of the ethanol liquid storage tank, the pressurizing pipeline is provided with a solenoid valve I, a discharge port of the ethanol liquid storage tank is connected to a supply port of the ethanol generator through a supply pipeline, and the supply pipeline is provided with a solenoid valve IX.
The outside of ethanol generator is connected with the level gauge, and the outside of level gauge is provided with highest level sensor and minimum level sensor.
Every structure in many ethanol delivery pipes is the same, all sets gradually solenoid valve, mass flow meter and check valve on every.
The discharge port of the ethanol generator is also connected with a damper outside the conveying thermostat through a pipeline.
The air conveying pipeline is sequentially provided with an electromagnetic valve V, a one-way valve and a mass flow meter I, and the air inlet and the nitrogen inlet are respectively provided with a drying pipe.
The outlet position of the gas mixing chamber is provided with a tee joint, the alcohol content detector is arranged at one gas outlet of the tee joint, the other gas outlet of the tee joint is connected to a differential pressure gauge, and a solenoid valve X is arranged between the gas outlet of the tee joint and the differential pressure gauge; and a photoelectric sensing device for sensing the exhaled air alcohol content detector is arranged on one side of the outlet of the gas mixing chamber.
The outside of conveying pipeline thermostated container is provided with ethanol standard gas jar in the air, acetone standard gas jar in the air and carbon monoxide standard gas jar in the air, and three jar bodies are connected to between check valve and the mass flow meter I on the air conveying pipeline through connecting tube jointly, all are provided with solenoid valve and check valve on each connecting tube.
Compared with the prior art, the utility model has the beneficial effects that:
1. the utility model can continuously generate ethanol gas in air with continuous concentration by diluting the ethanol gas carried out, and has high preparation efficiency;
2. the liquid level sensor arranged on the liquid level meter, such as an infrared detector, can automatically sense the liquid level change, and can automatically supplement alcohol when the liquid level is lower than the liquid level;
3. the device can be connected with an ethanol gas standard substance, a carbon monoxide gas standard substance and an acetone gas standard substance, and can be used for detecting the anti-interference capability of the expired gas alcohol content tester;
4. the outlet position of the gas mixing chamber is provided with a tee joint, the alcohol content detector is arranged at one gas outlet of the tee joint, and the other gas outlet of the tee joint is connected to the differential pressure gauge, so that the expiratory resistance of the expired gas alcohol content detector can be detected;
5. a photoelectric sensing device used for sensing the expired gas alcohol content detector is arranged on one side of the outlet of the gas mixing chamber, and expiration interruption detection of the expired gas alcohol content detector is achieved through adjustment of the electromagnetic valve V and the mass flow meter I.
6. The air mixing chamber of the device is arranged in the air mixing chamber thermostat, liquid such as heat-conducting silicone grease is filled between the air mixing chamber and the air mixing chamber thermostat, and the air conveying pipeline is arranged in the thermostat in a spiral mode to ensure that the temperature at the outlet of the air mixing chamber is 34 +/-0.5 ℃, so that the temperature of the air mixing chamber is close to the temperature of the air exhaled from the oral cavity of a human body, and the detection precision is improved.
Drawings
FIG. 1 is a schematic diagram of a calibrating apparatus for an expired gas alcohol content detector according to the present invention;
fig. 2 is a schematic view of the connection relationship among the photoelectric sensing device, the outlet position of the gas mixing chamber and the collection tube of the expired gas alcohol content detector.
The labels in the figure are: 1. an ethanol generator thermostat, 2, a conveying pipeline thermostat, 3, a gas mixing chamber thermostat, 4, a gas mixing chamber, 5, liquid, 6, an ethanol generator, 7, a heat insulating material, 8, ethanol, 9, a drying pipe, 10, a mass flow meter I, 11, a mass flow meter II, 12, a mass flow meter III, 13, a mass flow meter IV, 14, a damper, 15, an ethanol in air standard gas tank, 16, an acetone in air standard gas tank, 17, a carbon monoxide in air standard gas tank, 18, a one-way valve, 19, a tee joint, 20, a solenoid valve I, 21, a solenoid valve II, 22, a solenoid valve III, 23, a solenoid valve IV, 24, a solenoid valve V, 25, a solenoid valve VI, 26, a solenoid valve VII, 27 solenoid valve VIII, 28, a solenoid valve IX, 29, an ethanol liquid storage tank, 30-1, a highest liquid level sensor, 30-2 and a lowest liquid level sensor, 31. a liquid level meter 32, electromagnetic valves X, 33, a collecting pipe 34, a photoelectric sensing device 35 and a differential pressure meter.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the protection scope of the present invention.
The basic principle of the exhaled gas alcohol content detector calibrating device is the saturated vapor method principle, and liquid molecules enter an upper space through a liquid level to become vapor molecules when the liquid is evaporated in a limited closed space. Since the vapor molecules are in turbulent thermal motion, they collide with each other and with the container wall and liquid surface, and when they collide with the liquid surface, some molecules are attracted by the liquid molecules and return to the liquid again to become liquid molecules. At the beginning of evaporation, the number of molecules entering the space is greater than the number of molecules in the returning liquid, and as evaporation continues, the density of vapor molecules in the space increases and thus the number of molecules in the returning liquid also increases. When the number of molecules entering the space per unit time is equal to the number of molecules in the returning liquid, the evaporation and condensation are in a dynamic equilibrium state, and although the evaporation and condensation are still in progress, the density of vapor molecules in the space is not increased any more, and this state is called a saturated state. The liquid in a saturated state is called saturated liquid, and the corresponding vapor is saturated vapor. Carrying out ethanol saturated steam by high-purity nitrogen, controlling the required gas flow by using a mass flow meter, introducing the gas to a gas mixing chamber to mix with air, and diluting to the required concentration. And a liquid level sensor is arranged on the ethanol gas generator, and the function of automatically filling ethanol liquid is realized by program control. And liquid is filled between the air mixing chamber and the air mixing chamber thermostat, and the air conveying pipeline is arranged in the thermostat in a spiral mode so as to ensure that the temperature at the outlet of the air mixing chamber is 34 +/-0.5 ℃ and is close to the temperature of the air exhaled from the oral cavity of a human body. And a photoelectric sensor is arranged at an ethanol gas outlet in the air, and the position of a collecting pipe of the expired gas alcohol detector is automatically detected to realize the detection of the expiration resistance.
The calibrating device for the expired gas alcohol content detector comprises an ethanol generator thermostat 1, a conveying pipeline thermostat 2 and a gas mixing chamber thermostat 3, wherein an ethanol generator 6 is arranged inside the ethanol generator thermostat 1, a heat insulation material 7 is arranged outside the ethanol generator 6, a plurality of conveying pipelines are arranged inside the conveying pipeline thermostat 2, and a gas mixing chamber 4 is arranged inside the gas mixing chamber thermostat 3. The outside of conveying line thermostated container 2 is provided with air inlet and nitrogen gas entry, and wherein, air inlet passes through air conveying line and is connected to gas mixing chamber 4, and nitrogen gas entry passes through nitrogen gas conveying line and is connected to ethanol generator 6, and simultaneously, nitrogen gas entry is connected to ethanol liquid storage pot 29 through the pressurization pipe, and ethanol generator 6's discharge port passes through many ethanol conveyer pipe intercommunication gas mixing chamber 4, the exit position of gas mixing chamber sets up the alcohol content detector.
The air conveying pipeline is sequentially provided with an electromagnetic valve V24, a one-way valve 18-1 and a mass flow meter I10, and the air inlet and the nitrogen inlet are respectively provided with a drying pipe 9 so as to remove moisture in air and nitrogen.
The nitrogen conveying pipeline is sequentially provided with a mass flow meter II 11 and an electromagnetic valve II 21, the head end of a pressurizing pipeline is connected to a pipeline between the mass flow meter II 11 and the electromagnetic valve II 21, the tail end of the pressurizing pipeline is connected to a supply port of an ethanol liquid storage tank 29, the pressurizing pipeline is provided with an electromagnetic valve I20, a discharge port of the ethanol liquid storage tank 29 is connected to a supply port of an ethanol generator 6 through a supply pipeline, and the supply pipeline is provided with an electromagnetic valve IX 28.
The discharge port of the ethanol generator 6 is communicated with the gas mixing chamber 4 through a plurality of ethanol conveying pipes, each structure of the plurality of ethanol conveying pipes is the same, and each ethanol conveying pipe is sequentially provided with an electromagnetic valve, a mass flow meter and a one-way valve. In the embodiment, two ethanol conveying pipes are arranged, wherein one of the two ethanol conveying pipes is sequentially provided with an electromagnetic valve IV 23, a mass flow meter III 12 and a one-way valve 18-5, the other ethanol conveying pipe is sequentially provided with an electromagnetic valve III 22, a mass flow meter IV 13 and a one-way valve 18-6, the mass flow meter III 12 and the mass flow meter IV 13 on the two branches have different flow rates, and different concentration requirements are met through the control of the flow rates. For example, when low-concentration ethanol gas is required, the flow range of the mass flow meter III 12 can be controlled within 0-100ml/min by opening a pipeline provided with the electromagnetic valve IV 23, the mass flow meter III 12 and the check valve 18-5; when high-concentration ethanol gas is needed, the flow range of the mass flow meter IV 13 can be controlled within 100ml/min-300ml/min by opening a pipeline provided with an electromagnetic valve III 22, the mass flow meter IV 13 and a one-way valve 18-6; when higher concentration is needed, the two pipelines are simultaneously opened, so that ethanol gas with higher concentration is prepared. Through the mode, the conveying precision can be improved, and different test requirements can be met.
The outer side of the ethanol generator is connected with a liquid level meter 31, the outer part of the liquid level meter 31 is provided with a highest liquid level sensor 30-1 and a lowest liquid level sensor 30-2, in the utility model, the two liquid level sensors are respectively used for monitoring the highest liquid level and the lowest liquid level, liquid ethanol 8 is respectively arranged in an ethanol liquid storage tank 29 and an ethanol generator 6, liquid level changes can be automatically sensed through the liquid level sensors 30-1 and 30-2 arranged on the liquid level meter, for example, an infrared detector can automatically sense the liquid level changes, and the ethanol can be automatically supplemented when the liquid level is lower than a set value.
During normal operation, the electromagnetic valve II 21 on the nitrogen gas conveying pipeline is opened to convey nitrogen gas for the ethanol generator 6, and at the moment, the electromagnetic valve I20 on the pressurizing conveying pipeline is in a closed state. The nitrogen enters the ethanol generator 6, and simultaneously the ethanol gas is discharged from a discharge port of the ethanol generator 6 and is conveyed at different flow rates through a plurality of ethanol conveying pipes. When the lowest liquid level sensor 30-2 detects that the liquid level of the ethanol liquid in the ethanol generator 6 reaches a set value, it indicates that the ethanol in the ethanol generator 6 needs to be supplemented, then, the electromagnetic valve II 21 on the nitrogen gas conveying pipeline is closed, the electromagnetic valve I20 on the pressurizing conveying pipeline and the electromagnetic valve IX 28 on the supply pipeline are opened, the electromagnetic valve I20 is opened, the ethanol liquid storage tank 29 is pressurized, the ethanol in the ethanol generator 6 is supplemented by opening the electromagnetic valve IX 28 on the supply pipeline while the pressurization is carried out, and the conveying amount of the nitrogen gas is measured by the mass flow meter II 11.
As shown in fig. 2, a tee joint 19 is arranged at the outlet of the gas mixing chamber, a collection pipe 33 of the alcohol content detector is arranged at one gas outlet of the tee joint 19, the other gas outlet of the tee joint 19 is connected to a differential pressure gauge 35, and an electromagnetic valve x 32 is arranged between the three gas outlets, so that the expiratory resistance of the expired gas alcohol content tester can be verified.
And a photoelectric sensing device 34 for sensing the expired gas alcohol content detector is arranged on one side of the outlet position of the gas mixing chamber 4, and the expiration interruption of the expired gas alcohol content detector is detected by adjusting the electromagnetic valve V24 and the mass flow meter I10.
The outside of conveying pipeline thermostated container 2 is provided with ethanol standard gas jar 15 in the air, acetone standard gas jar 16 in the air and carbon monoxide standard gas jar 17 in the air, three jar bodies are connected to through connecting tube jointly on one of them conveying pipeline, and connecting tube with one of them conveying pipeline's tie point be located between check valve 18-1 and mass flow meter I10, each connecting tube on all be provided with solenoid valve and check valve. In the embodiment, a connecting pipeline connected with an ethanol standard gas tank 15 in the air is provided with an electromagnetic valve VI 25 and a one-way valve 18-2, a connecting pipeline connected with an acetone standard gas tank 16 in the air is provided with an electromagnetic valve VII 26 and a one-way valve 18-3, and a connecting pipeline connected with a carbon monoxide standard gas tank 17 in the air is provided with an electromagnetic valve VIII 27 and a one-way valve 18-4. According to the utility model, the ethanol gas standard substance, the carbon monoxide gas standard substance and the acetone gas standard substance can be respectively connected into the three tank bodies, the temperature of the gas outlet is ensured to reach 34 +/-0.5 ℃, the anti-interference capability of the expired gas alcohol content tester can be tested, and the testing precision is high.
The verification process of the utility model is specifically realized as follows:
1. preparing ethanol gas in air: turning on a power switch of the device, setting the temperature of an ethanol generator thermostat 1 to be 32.0 ℃, setting the temperature of the ethanol generator to be 35.0 ℃, setting the temperature of a conveying pipeline thermostat 2 to be 35.0 ℃, setting the temperature of a gas mixing chamber thermostat 3 to be 34.5 ℃, feeding high-purity nitrogen from a nitrogen inlet after the four temperature set values are reached, adjusting the switch of a pressure reducing valve to enable the output pressure to be 0.4MPa, and slowly adjusting a precise pressure stabilizing valve to enable the output pressure to be 0.2 MPa; and opening an air compressor switch, and adjusting the output pressure to be 0.4 MPa. According to the prepared ethanol gas concentration, the electromagnetic valves 21, 22, 23 and 24 are selectively opened, and parameters of the mass flowmeters 10, 11, 12 and 13 are set, such as: the method comprises the following steps of detecting the detection regulation requirements of the exhaled gas alcohol content detector according to JJG657-2019, wherein the indication errors of three concentration points of 0.1mg/L, 0.4mg/L and 0.6mg/L need to be detected, and the corresponding settings are as follows:
(1) when the detection is 0.1mg/L, opening an electromagnetic valve II 21, an electromagnetic valve IV 23 and an electromagnetic valve V24, setting a mass flow meter I10 on an air gas circuit at 15L/min, enabling air to flow through a one-way valve 18-1 and then enter a gas mixing chamber 4 in a gas mixing chamber thermostat 3, setting a mass flow meter II 11 on a nitrogen gas circuit at 500mL/min, enabling nitrogen to flow through an electromagnetic valve II 21 and then enter an ethanol generator 6, carrying out ethanol gas, setting a mass flow meter III 12 at 20mL/min, and enabling the ethanol gas to flow through a one-way valve 18-5 and then enter a gas mixing chamber 4 in the gas mixing chamber thermostat 3. In the gas mixing chamber, the ethanol gas is mixed with air and heated to form ethanol gas in the air at 34.0 ℃. Excess ethanol gas is vented through damper 14.
(2) When 0.4mg/L is detected, opening an electromagnetic valve II 21, an electromagnetic valve IV 23 and an electromagnetic valve V24, setting a mass flow meter I10 on an air gas circuit at 15L/min, setting air to flow through a one-way valve 18-1 and then enter a gas mixing chamber 4 in a gas mixing chamber thermostat 3, setting a mass flow meter II 11 at 500mL/min, setting nitrogen to flow through the electromagnetic valve II 21 and then enter an ethanol generator 6, carrying ethanol gas out, setting a mass flow meter III 12 at 80mL/min, and setting the ethanol gas to flow through the one-way valve 18-5 and then enter the gas mixing chamber 4 in the gas mixing chamber thermostat 3. In the gas mixing chamber, the ethanol gas is mixed with air and heated to form ethanol gas in the air at 34.0 ℃. Excess ethanol gas is vented through damper 14.
(3) When the detection is 0.6mg/L, opening an electromagnetic valve II 21, an electromagnetic valve III 22 and an electromagnetic valve V24, setting a mass flow meter I10 on an air gas circuit at 15L/min, enabling air to flow through a one-way valve 18-1 and then enter a gas mixing chamber 4 in a gas mixing chamber thermostat 3, setting a mass flow meter II 11 at 500mL/min, enabling nitrogen to flow through the electromagnetic valve II 21 and then enter an ethanol generator 6, carrying out ethanol gas, setting a mass flow meter IV 13 at 124mL/min, and enabling the ethanol gas to flow through the one-way valve 18-6 and then enter the gas mixing chamber 4 in the gas mixing chamber thermostat 3. In the gas mixing chamber, the ethanol gas is mixed with air and heated to form ethanol gas in the air at 34.0 ℃. Excess ethanol gas is vented through damper 14.
(4) When it is desired to formulate a higher concentration point, for example: at 2.0mg/L, opening an electromagnetic valve II 21, an electromagnetic valve III 22, an electromagnetic valve IV 23 and an electromagnetic valve V24, setting a mass flow meter I10 on an air gas circuit at 15L/min, enabling air to flow through a one-way valve 18-1 and then enter a gas mixing chamber 4 in a gas mixing chamber thermostat 3, setting a mass flow meter II 11 at 500mL/min, enabling nitrogen to flow through an electromagnetic valve II 21 and then enter an ethanol generator 6, carrying out ethanol gas, setting a mass flow meter III 12 at 100mL/min, setting a mass flow meter IV 13 at 300mL/min, and enabling two paths of ethanol gas to flow through one-way valves 18-5 and 18-6 and then enter the gas mixing chamber 4 in the gas mixing chamber thermostat 3. In the gas mixing chamber, the ethanol gas is mixed with air and heated to form ethanol gas in the air at 34.0 ℃. Excess ethanol gas is vented through damper 14.
2. Ethanol generator liquid replenishment:
as described above, high-purity nitrogen gas was fed, and the opening and closing of the pressure reducing valve were adjusted so that the output pressure became 0.4 MPa. The ethanol generator 6 is connected with a liquid level meter 31 through a communicating vessel, the liquid level meter 31 is made of transparent organic glass, and two liquid level sensors 30-1 and 30-2 are arranged on the liquid level meter. When the liquid ethanol 8 in the ethanol generator 6 descends to the lowest liquid level sensor 30-2, the lowest liquid level sensor 30-2 sends a signal to control the electromagnetic valve II 21 to be closed, the electromagnetic valve I20 and the electromagnetic valve IX 28 to be opened, and the ethanol in the liquid storage tank 29 is pressed into the ethanol generator 6 under the action of nitrogen. When the liquid level of the ethanol in the liquid level meter 31 rises to the highest liquid level sensor 30-1, the highest liquid level sensor 30-1 sends a signal, the electromagnetic valve I20 and the electromagnetic valve IX 28 are controlled to be closed, the electromagnetic valve II 21 is controlled to be opened, and the ethanol generator 6 works normally to carry out ethanol gas.
3. The implementation of anti-interference verification work is carried out according to the regulations in JJG657-2019 exhaled air alcohol content detector:
on the basis of the previous startup, the set value of 500mL of the mass flow meter 11 is kept unchanged, the electromagnetic valve III 22, the electromagnetic valve IV 23 and the electromagnetic valve V24 are closed, and the ethanol gas is exhausted through the damper 14. Keeping the set value of 15L/min of the mass flowmeter I10 unchanged, opening the pressure reducing valves on the three tank bodies 15, 16 and 17 in sequence, adjusting the output pressure to be 0.4MPa, firstly, opening an electromagnetic valve VI 25, leading the ethanol gas standard substance stored in an ethanol standard gas tank 15 in the air to pass through a one-way valve 18-2 and a mass flowmeter I10, enters the gas mixing chamber 4 at the flow rate of 15L/min, is heated and then is discharged at the temperature of 34.0 ℃, the device is used for calibrating the expired gas alcohol content detector, after calibration is finished, the solenoid valve VI 25 is closed, the solenoid valve VII 26 is opened, 0.5mg/L acetone gas standard substance passes through the one-way valve 18-3 and the mass flow meter I10, enters the gas mixing chamber 4 at the flow rate of 15L/min, is heated and is discharged at the temperature of 34.0 ℃, and (4) introducing an expired gas alcohol content detector, and reading an indication value on the expired gas alcohol content detector. And closing the electromagnetic valve VII 26, opening the electromagnetic valve VIII 27, enabling 0.2mg/L of carbon monoxide gas standard substance to enter the gas mixing chamber 4 at the flow rate of 15L/min through the one-way valve 18-4 and the mass flow meter 10, heating, discharging at the temperature of 34.0 ℃, introducing into the expired gas alcohol content detector, and reading the indication value on the expired gas alcohol content detector. After the verification is finished, the electromagnetic valve VIII 27 is closed
4. The expiratory resistance verification work is realized according to the regulation in JJG657-2019 exhaled gas alcohol content detector:
on the basis of the previous startup, the set value of 500mL of the mass flow meter II 11 is kept unchanged, the electromagnetic valve III 22 and the electromagnetic valve IV 23 are closed, and the ethanol gas is emptied through the damping pipe 14. Opening the electromagnetic valve V24 and the electromagnetic valve X32, setting the output value of the mass flow meter I10 to be 2L/min, enabling air to enter the air mixing chamber, enabling one end of the air to be input into the ethanol gas alcohol content detector through the tee joint 19, enabling the other end of the air to be input into the differential pressure meter 35, arranging a photoelectric sensing device 34 beside the outlet of the ethanol gas in the air, starting a control program of the mass flow meter I10 after a collecting pipe 33 of the ethanol gas alcohol content detector is placed at the outlet of the ethanol gas in the air and detected by the photoelectric sensing device 34, controlling the output value of the mass flow meter I10 to be increased to 12L/min according to the increase of 1L/s, and stabilizing the output value at 12L/min, and recording the indicating value of the differential pressure meter 35.
5. The implementation of the expiratory hold-off verification work was carried out according to the regulations in jjjg 657-2019 "exhaled breath alcohol content detector":
on the basis of the previous startup, the set value of 500mL of the mass flow meter II 11 is kept unchanged, the electromagnetic valve III 22 and the electromagnetic valve IV 23 are closed, and the ethanol gas is emptied through the damping pipe 14. Opening an electromagnetic valve V24, setting the output value of a mass flow meter I10 to be 36L/min, enabling air to enter a gas mixing chamber 4, closing an electromagnetic valve X32 at a tee joint 19, arranging a photoelectric sensing device 34 beside an outlet of ethanol gas in the air, starting a control program of the mass flow meter I10 after a collecting pipe 33 of the ethanol gas alcohol content detector is placed at the outlet of the ethanol gas in the air and the photoelectric sensing device 34 detects the result, and controlling the output value of the mass flow meter I10 to rapidly decrease to below 5L/min after 2 seconds, so that the verification work of expiration interruption can be realized.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. The utility model provides an expired gas alcohol content testing appearance calibrating installation, includes ethanol generator thermostated container, conveying line thermostated container and gas mixing chamber thermostated container, its characterized in that: the ethanol generator is arranged in the ethanol generator thermostat, a plurality of conveying pipelines are arranged in the conveying pipeline thermostat, a gas mixing chamber is arranged in the gas mixing chamber thermostat, an air inlet and a nitrogen inlet are arranged outside the conveying pipeline thermostat, the air inlet is connected to the gas mixing chamber through the air conveying pipeline, the nitrogen inlet is connected to the ethanol generator through the nitrogen conveying pipeline, meanwhile, the nitrogen inlet is connected to the ethanol liquid storage tank through a pressurizing pipeline, the discharge outlet of the ethanol generator is communicated with the gas mixing chamber through a plurality of ethanol conveying pipes, and the outlet of the gas mixing chamber is provided with the alcohol content detector;
the nitrogen conveying pipeline is sequentially provided with a mass flow meter II and a solenoid valve II, the head end of the pressurizing pipeline is connected to a pipeline between the mass flow meter II and the solenoid valve II, the tail end of the pressurizing pipeline is connected to a supply port of the ethanol liquid storage tank, the solenoid valve I is arranged on the pressurizing pipeline, a discharge port of the ethanol liquid storage tank is connected to a supply port of the ethanol generator through a supply pipeline, and the supply pipeline is provided with a solenoid valve IX;
the outside of ethanol generator is connected with the level gauge, and the outside of level gauge is provided with highest level sensor and minimum level sensor.
2. The calibrating device for the expired gas alcohol content detector as claimed in claim 1, wherein: every structure in many ethanol delivery pipes is the same, all sets gradually solenoid valve, mass flow meter and check valve on every.
3. The calibrating device for the expired gas alcohol content detector as claimed in claim 1, wherein: the discharge port of the ethanol generator is also connected with a damper outside the conveying thermostat through a pipeline.
4. The calibrating device for the expired gas alcohol content detector as claimed in claim 1, wherein: the air conveying pipeline is sequentially provided with an electromagnetic valve V, a one-way valve and a mass flow meter I, and the air inlet and the nitrogen inlet are respectively provided with a drying pipe.
5. The calibrating device for the expired gas alcohol content detector as claimed in claim 1, wherein: the outlet position of the gas mixing chamber is provided with a tee joint, the alcohol content detector is arranged at one gas outlet of the tee joint, the other gas outlet of the tee joint is connected to a differential pressure gauge, and a solenoid valve X is arranged between the gas outlet of the tee joint and the differential pressure gauge; and a photoelectric sensing device for sensing the exhaled air alcohol content detector is arranged on one side of the outlet of the gas mixing chamber.
6. The calibrating device for the expired gas alcohol content detector as claimed in claim 1, wherein: the outside of conveying pipeline thermostated container is provided with ethanol standard gas jar in the air, acetone standard gas jar in the air and carbon monoxide standard gas jar in the air, and three jar bodies are connected to between check valve and the mass flow meter I on the air conveying pipeline through connecting tube jointly, all are provided with solenoid valve and check valve on each connecting tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120535533.5U CN215525680U (en) | 2021-03-15 | 2021-03-15 | Calibrating device for expired gas alcohol content detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120535533.5U CN215525680U (en) | 2021-03-15 | 2021-03-15 | Calibrating device for expired gas alcohol content detector |
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| CN215525680U true CN215525680U (en) | 2022-01-14 |
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| CN113030389A (en) * | 2021-03-15 | 2021-06-25 | 河南省计量科学研究院 | Exhaled gas alcohol content detector calibrating device and calibrating method thereof |
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