Gas pulse dilution device and method

Abstract

The invention discloses a gas pulse dilution device and method, comprising a sample control solenoid valve connected to the sample gas, an upper cleaning channel switch valve, a cleaning cylinder gas control solenoid valve, a dilution gas control solenoid valve, a standard gas control solenoid valve, a dilution gas filling valve, a lower cleaning valve, a mixer and a constant flow pump. The invention has a simple structure and ingenious design, adopts a two-position two-way valve and a two-position three-way valve as different sample conversion channels, a pulse time and a constant flow pump as a dilution unit, and uses a mixer to mix the gas. The invention has good stability, low application failure rate, low price, and diversified functions, and integrates the functions of calibration curve preparation, sample dilution and injection, pressurized sample injection and sampling bag cleaning. The invention injects samples for instruments while diluting, eliminates sample transfer errors, reduces personnel operation time, and increases use efficiency. The invention can provide injection services for multiple instruments at the same time, has broad application prospects, and is conducive to popularization and application.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical analysis, and in particular to a gas pulse dilution device and method. Background Art

[0002] The detection of gas samples is a very common inspection item in the analysis and testing industries such as chemical industry, environmental protection, and occupational protection. There are usually two methods for diluting gases, namely flow method and weight method. The flow method is to pass two different gases through the mass flow meter separately, and calculate the content of the diluted sample based on the mass ratio after mixing; the weight method is to compress different gases into a constant weight container, and calculate the content of the diluted sample based on the weight ratio of different components after mixing. At present, the injector of gas samples has the following disadvantages: ① The structure is complex, and twelve or sixteen-way valves are generally used as different sample conversion channels, and mass flow pumps are used as dilution units. ② The price is expensive. Due to the use of multi-position multi-channel flat or conical gas valves and mass flow meters, the overall price is very expensive. ③ The function is single. Since the multi-channel multi-position valve will affect the accuracy of the mass flow pump, the current gas injector is completed by combining two instruments for injection and dilution. The dilution of the calibration curve or sample must be prepared on the diluter first, and then transferred to the injector to complete the injection. The work is cumbersome, costly and time-consuming.

[0003] Therefore, it is urgent to develop a gas pulse dilution device and method to solve the above technical problems.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a gas pulse dilution device and method, which have a simple structure and ingenious design. A two-position two-way valve and a two-position three-way valve are used as different sample conversion channels, a pulse time and a constant current pump are used as a dilution unit, and a mixer is used to mix the gas. The device and method have good stability, a low application failure rate, a low price, and diversified functions. The device and method integrate the functions of calibration curve preparation, sample dilution and injection, pressurized sample injection and sampling bag cleaning. The device and method can inject samples for instruments while diluting, thereby eliminating sample transfer errors, reducing personnel operation time, and increasing use efficiency. The device and method can provide injection services for multiple instruments at the same time, and have broad application prospects and are conducive to popularization and application.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a gas pulse dilution device, including a sample control solenoid valve J01-J40 connected to the sample gas, an upper cleaning channel switch valve J41-J45, a cleaning cylinder gas control solenoid valve J46, a dilution gas control solenoid valve J47, a standard gas control solenoid valve J48, a dilution gas filling valve J49, a lower cleaning valve J51-J55, a mixer and a constant flow pump. Every eight sample control solenoid valves share a common channel. The upper cleaning channel switch valve J41-J45, the cleaning cylinder gas control solenoid valve J46, the dilution gas control solenoid valve J47 and the standard gas control solenoid valve J48 share a channel. The dilution gas filling valve J49 and the lower cleaning valves J51-J55 share a channel. All of the above valves are two-position, two-way normally closed solenoid valves. The bypass interface solenoid valves J50 and J56 of the mixer are two-position, three-way Normally closed solenoid valve, the air inlet glass tube of the mixer goes straight to the bottom of the bottle, the air outlet is at the top of the bottle, the outside is wrapped with a heating film and a temperature sensing probe, the outside of the heating film is wrapped with insulation material and aluminum foil, the cleaning cylinder gas is connected to the constant temperature heating module through a pressure reducing valve, the constant temperature heating module is cylindrical, a heating rod and a temperature sensing probe 2 are inserted inside, and a stainless steel pipeline is wrapped outside, the outside of the stainless steel pipeline is wrapped with insulation material and aluminum foil in turn, the stainless steel pipeline is connected to the aluminum seat at the bottom of the solenoid valve J46, the constant flow pump is connected to the outlet of the solenoid valve J56 in front and the sampling port of the detection instrument in the back, the outside is wrapped with insulation material, and the flow rate is adjustable. The gas flows at a constant flow rate in the same common pipeline, and different gases are switched through the pulse valve, and enter the common channel according to different pulse times. After mixing in the mixer, it is injected into the detection instrument through the constant flow pump. The calculation formula is as follows: ;

[0007] Where: T-pulse time; V-constant flow rate; t-single pulse time; M-pulse number;

[0008] Through the above calculation, the dilution ratio is positively correlated with the pulse number ratio of the sample, that is, when the pipeline gas has a constant flow, the dilution degree of the sample can be calculated by using the ratio of the pulse number of the sample valve opening and closing to the pulse number of the dilution valve opening and closing, thereby diluting the standard gas or sample gas according to the set ratio.

[0009] Preferably, the mixer is made of high temperature resistant glass and has a capacity of 100 ml.

[0010] Preferably, the heating film wrapped around the outside of the mixer is 100W, and the temperature sensing probe is PT100.

[0011] Preferably, the thickness of the heat-insulating material wrapped around the heating film is 3 mm.

[0012] Preferably, the heating rod inserted inside the constant temperature heating module is 100W, the second temperature sensing probe is PT100, and the thickness of the external insulation material is 3mm.

[0013] Preferably, the flow rate of the constant flow pump is 0-3.0 L / min, and the thickness of the externally wrapped insulation material is 3 mm.

[0014] Preferably, 20 turns of Φ1.62 stainless steel pipeline are wound around the constant temperature heating module.

[0015] The present invention also provides a gas pulse dilution method, which uses the above-mentioned gas pulse dilution device and comprises the following steps:

[0016] S1: Pre- or post-sample cleaning: Cleaning of internal pipes is determined based on sample type;

[0017] S2: Injection operation: select the internal injection pipeline and injection method according to the sample type;

[0018] S3: Valve cleaning operation: After the sample operation is completed or the instrument is stopped, select the sample valve number that needs to be cleaned, press the valve cleaning button, and open all the selected sample valves in each group according to the cleaning time until all the selected sample valves are cleaned;

[0019] S4: Bag cleaning operation: After the sample operation is completed or the instrument is stopped, select the sample bag number to be cleaned, press the bag cleaning button, and the instrument will fill and discharge the cleaning gas according to the selected bag cleaning times until all cleaning is completed;

[0020] S5: Constant temperature operation: select constant temperature for cleaning gas and mixing bottle heating, heat up to constant temperature according to the set temperature, and then start other operations;

[0021] S6: Dilution gas filling operation: Press the filling button, the instrument automatically fills the dilution gas bag with dilution gas. This button is invalid when the operation light is on.

[0022] Preferably, the specific steps of S1 are:

[0023] SS1: Calibration sample: Open valves J46, J49, J50 and J56, and clean according to the cleaning time before or after the sample. After cleaning, close all solenoid valves and wait for the cleaning balance time before performing other operations;

[0024] SS2: Diluted sample: Open valves J46, J49, J50 and J56, and search for the corresponding group number according to the sample number, open the corresponding cleaning valves above and below, and clean according to the time set in the method. After cleaning, close the valves. After cleaning, wait for the cleaning balance time in the method before performing other operations;

[0025] SS3: Air bag sample: Find the corresponding group number according to the sample number, open the corresponding cleaning valves at the top and bottom, and open the J46 valve at the same time, clean according to the time set in the method, and close the valve when cleaning is completed. After cleaning, wait for the cleaning balance time in the method before performing other operations;

[0026] SS4: Ball bladder sample: Find the corresponding group number according to the sample number, open the corresponding upper and lower cleaning valves, open the J46 valve at the same time, clean according to the time set in the method, close the valve when finished, and wait for the cleaning balance time in the method before performing other operations after cleaning.

[0027] Preferably, the specific steps of S2 are:

[0028] SS1: Standard sample: Select the sample type as standard sample, select the dilution ratio, open the J48 valve and J47 valve according to the pulse ratio, open J49, J50, J56 and the constant flow pump at the same time, inject the sample into the detection instrument according to the injection time, and wait for the injection balance time after injection before sending the injection signal to the chromatograph or mass spectrometer;

[0029] SS2: Diluted sample: Select the sample type as diluted sample, select the dilution ratio, open the valve corresponding to the sample and J47 valve according to the pulse ratio, open J49 and the lower cleaning valve corresponding to the sample group at the same time, and open J50, J56 and the constant flow pump, inject the sample into the detection instrument according to the injection time, and wait for the injection balance time after injection before sending the injection signal to the chromatograph or mass spectrometer;

[0030] SS3: Air bag sample: Select the sample type as air bag sample, open the sample gas valve corresponding to the sample and the lower cleaning valve corresponding to the sample group, and turn on the constant flow pump at the same time, inject the sample into the detection instrument according to the injection time, and wait for the injection balance time after injection before sending the injection signal to the chromatograph or mass spectrometer;

[0031] SS4: Ball bladder sample: Select the sample type as ball bladder sample, open the sample gas valve corresponding to the sample and the lower cleaning valve corresponding to the sample group, inject the sample into the detection instrument according to the injection time, and wait for the "injection balance time" after injection before sending the injection signal to the chromatograph or mass spectrometer;

[0032] The operation light is turned on during all the above operations, and the valve cleaning and bag cleaning buttons are invalid during operation.

[0033] The gas pulse dilution device and method provided by the present invention have the following beneficial effects.

[0034] 1. The present invention has a simple structure and ingenious design. It uses two-position two-way valves and two-position three-way valves as different sample conversion channels, pulse time and constant current pumps as dilution units, and a mixer to mix the gas. It has good stability, low application failure rate, and low price.

[0035] 2. The present invention has diversified functions, integrating calibration curve preparation, sample dilution and injection, pressurized sample injection and sampling bag cleaning. It can inject samples into instruments while diluting, eliminate sample transfer errors, reduce personnel operation time, increase use efficiency, and provide injection services for multiple instruments at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a structural block diagram of a gas pulse dilution device provided by the present invention. DETAILED DESCRIPTION

[0037] The present invention is further described below in conjunction with specific embodiments and drawings to help understand the content of the present invention.

[0038] like Figure 1 The figure shows a block diagram of a gas pulse dilution device provided by the present invention. The gas pulse dilution device includes a sample control solenoid valve J01-J40 connected to the sample gas, an upper cleaning channel switch valve J41-J45, a cleaning cylinder gas control solenoid valve J46, a dilution gas control solenoid valve J47, a standard gas control solenoid valve J48, a dilution gas filling valve J49, a lower cleaning valve J51-J55, a mixer and a constant flow pump. Every eight sample control solenoid valves share a common channel. The upper cleaning channel switch valve J41-J45, the cleaning cylinder gas control solenoid valve J46, the dilution gas control solenoid valve J47 and the standard gas control solenoid valve J48 share a channel. The dilution gas filling valve J49 and the lower cleaning valves J51-J55 share a channel. All of the above valves are two-position, two-way normally closed solenoid valves. The bypass interface solenoid valves J50 and J56 of the mixer are two-position, three-way normally closed solenoid valves. The air inlet glass tube of the mixer goes straight to the bottom of the bottle, and the air outlet is at the top of the bottle. The outside is wrapped with a heating film and a temperature sensing probe 1, and the outside of the heating film is wrapped with insulation material and aluminum foil. The cleaning cylinder gas is connected to the constant temperature heating module through a pressure reducing valve. The constant temperature heating module is cylindrical, and a heating rod and a temperature sensing probe 2 are inserted inside it. A stainless steel pipeline is wrapped outside. The outside of the stainless steel pipeline is wrapped with insulation material and aluminum foil in turn. The stainless steel pipeline is connected to the aluminum seat at the bottom of the solenoid valve J46. The constant flow pump is connected to the outlet of the solenoid valve J56 in front and the sampling port of the detection instrument in the back. The outside is wrapped with insulation material, and the flow rate is adjustable. The gas flows at a constant flow rate in the same common pipeline. Different gases are switched through the pulse valve and enter the common channel according to different pulse times. After mixing in the mixer, it is injected into the detection instrument through the constant flow pump. The calculation formula is as follows: ;

[0039] Where: T-pulse time; V-constant flow rate; t-single pulse time; M-pulse number;

[0040] Through the above calculation, the dilution ratio is positively correlated with the pulse number ratio of the sample, that is, when the pipeline gas has a constant flow, the dilution degree of the sample can be calculated by using the ratio of the pulse number of the sample valve opening and closing to the pulse number of the dilution valve opening and closing, thereby diluting the standard gas or sample gas according to the set ratio.

[0041] The mixer is made of high-temperature resistant glass and has a capacity of 100ml. The heating film wrapped outside the mixer is 100W, and the temperature sensing probe one is PT100. The thickness of the insulation material wrapped outside the heating film is 3mm. The heating rod inserted inside the constant temperature heating module is 100W, the temperature sensing probe two is PT100, and the thickness of the insulation material wrapped outside is 3mm. The flow rate of the constant flow pump is 0-3.0 L / min, and the thickness of the insulation material wrapped outside is 3mm. The constant temperature heating module is wrapped with 20 turns of Φ1.62 stainless steel pipeline.

[0042] The present invention also provides a gas pulse dilution method, which uses the above-mentioned gas pulse dilution device and comprises the following steps:

[0043] S1: Pre- or post-sample cleaning: Cleaning of internal pipes is determined based on sample type;

[0044] S2: Injection operation: select the internal injection pipeline and injection method according to the sample type;

[0045] S3: Valve cleaning operation: After the sample operation is completed or the instrument is stopped, select the sample valve number that needs to be cleaned, press the valve cleaning button, and open all the selected sample valves in each group according to the cleaning time until all the selected sample valves are cleaned;

[0046] S4: Bag cleaning operation: After the sample operation is completed or the instrument is stopped, select the sample bag number to be cleaned, press the bag cleaning button, and the instrument will fill and discharge the cleaning gas according to the selected bag cleaning times until all cleaning is completed;

[0047] S5: Constant temperature operation: select constant temperature for cleaning gas and mixing bottle heating, heat up to constant temperature according to the set temperature, and then start other operations;

[0048] S6: Dilution gas filling operation: Press the filling button, the instrument automatically fills the dilution gas bag with dilution gas. This button is invalid when the operation light is on.

[0049] Preferably, the specific steps of S1 are:

[0050] SS1: Calibration sample: Open valves J46, J49, J50 and J56, and clean according to the cleaning time before or after the sample. After cleaning, close all solenoid valves and wait for the cleaning balance time before performing other operations;

[0051] SS2: Diluted sample: Open valves J46, J49, J50 and J56, and search for the corresponding group number according to the sample number, open the corresponding cleaning valves above and below, and clean according to the time set in the method. After cleaning, close the valves. After cleaning, wait for the cleaning balance time in the method before performing other operations;

[0052] SS3: Air bag sample: Find the corresponding group number according to the sample number, open the corresponding cleaning valves at the top and bottom, and open the J46 valve at the same time, clean according to the time set in the method, and close the valve when cleaning is completed. After cleaning, wait for the cleaning balance time in the method before performing other operations;

[0053] SS4: Ball bladder sample: Find the corresponding group number according to the sample number, open the corresponding upper and lower cleaning valves, open the J46 valve at the same time, clean according to the time set in the method, close the valve when finished, and wait for the cleaning balance time in the method before performing other operations after cleaning.

[0054] Preferably, the specific steps of S2 are:

[0055] SS1: Standard sample: Select the sample type as standard sample, select the dilution ratio, open the J48 valve and J47 valve according to the pulse ratio, open J49, J50, J56 and the constant flow pump at the same time, inject the sample into the detection instrument according to the injection time, and wait for the injection balance time after injection before sending the injection signal to the chromatograph or mass spectrometer;

[0056] SS2: Diluted sample: Select the sample type as diluted sample, select the dilution ratio, open the valve corresponding to the sample and J47 valve according to the pulse ratio, open J49 and the lower cleaning valve corresponding to the sample group at the same time, and open J50, J56 and the constant flow pump, inject the sample into the detection instrument according to the injection time, and wait for the injection balance time after injection before sending the injection signal to the chromatograph or mass spectrometer;

[0057] SS3: Air bag sample: Select the sample type as air bag sample, open the sample gas valve corresponding to the sample and the lower cleaning valve corresponding to the sample group, and turn on the constant flow pump at the same time, inject the sample into the detection instrument according to the injection time, and wait for the injection balance time after injection before sending the injection signal to the chromatograph or mass spectrometer;

[0058] SS4: Ball bladder sample: Select the sample type as ball bladder sample, open the sample gas valve corresponding to the sample and the lower cleaning valve corresponding to the sample group, inject the sample into the detection instrument according to the injection time, and wait for the "injection balance time" after injection before sending the injection signal to the chromatograph or mass spectrometer;

[0059] The operation light is turned on during all the above operations, and the valve cleaning and bag cleaning buttons are invalid during operation.

[0060] The invention has a simple structure and ingenious design, adopts a two-position two-way valve and a two-position three-way valve as different sample conversion channels, a pulse time and a constant current pump as a dilution unit, and uses a mixer to mix the gas, has good stability, low application failure rate, low price, and diversified functions, and integrates the functions of calibration curve preparation, sample dilution and injection, pressurized sample injection and sampling bag cleaning. It can inject samples for instruments while diluting, eliminates sample transfer errors, reduces personnel operation time, and increases use efficiency, can provide injection services for multiple instruments at the same time, has broad application prospects, and is conducive to popularization and application.

[0061] The invention concept is described in detail using specific examples herein, and the description of the above embodiments is only used to help understand the core idea of ​​the invention. It should be pointed out that any obvious modification, equivalent substitution or other improvement made by a person of ordinary skill in the art without departing from the invention concept should be included in the protection scope of the present invention.

Claims

1. A gas pulse dilution device, characterized in that: It includes sample control solenoid valves J01-J40 connected with the sample gas, upper cleaning channel switch valves J41-J45, cleaning cylinder gas control solenoid valves J46, dilution gas control solenoid valves J47, standard gas control solenoid valves J48, dilution gas filling valves J49, lower cleaning valves J51-J55, mixers and constant flow pumps. Every eight sample control solenoid valves share a common channel. The upper cleaning channel switch valves J41-J45, cleaning cylinder gas control solenoid valves J46, dilution gas control solenoid valves J47 and standard gas control solenoid valves J48 share a channel. The dilution gas filling valve J49 and lower cleaning valves J51-J55 share a channel. All of the above valves are two-position, two-way normally closed solenoid valves. The bypass interface solenoid valves J50 and J56 of the mixer are two-position, three-way normally closed solenoid valves. The inlet of the mixer The gas glass tube goes straight to the bottom of the bottle, and the gas outlet is at the top of the bottle. The outside is wrapped with a heating film and a temperature sensing probe. The outside of the heating film is wrapped with insulation material and aluminum foil. The cleaning cylinder gas is connected to the constant temperature heating module through a pressure reducing valve. The constant temperature heating module is cylindrical, and a heating rod and a temperature sensing probe are inserted inside it. A stainless steel pipeline is wrapped outside. The outside of the stainless steel pipeline is wrapped with insulation material and aluminum foil in turn. The stainless steel pipeline is connected to the aluminum seat at the bottom of the solenoid valve J46. The constant flow pump is connected to the outlet of the solenoid valve J56 in front and the sampling port of the detection instrument in the back. The outside is wrapped with insulation material, and the flow rate is adjustable. The gas flows at a constant flow rate in the same common pipeline. Different gases are switched through the pulse valve and converted into the common channel according to different pulse times. After mixing in the mixer, it is injected into the detection instrument through the constant flow pump. The calculation formula is as follows: ; Where: T-pulse time; V-constant flow rate; t-single pulse time; M-pulse number; Through the above calculation, the dilution ratio is positively correlated with the pulse number ratio of the sample, that is, when the pipeline gas has a constant flow, the dilution degree of the sample can be calculated by using the ratio of the pulse number of the sample valve opening and closing to the pulse number of the dilution valve opening and closing, thereby diluting the standard gas or sample gas according to the set ratio.

2. A gas pulse dilution device according to claim 1, characterized in that: The mixer is made of high temperature resistant glass and has a capacity of 100 ml.

3. A gas pulse dilution device according to claim 2, characterized in that: The heating film wrapped outside the mixer is 100W, and the temperature sensing probe is PT100.

4. A gas pulse dilution device according to claim 3, characterized in that: The thickness of the insulation material wrapped around the heating film is 3mm.

5. A gas pulse dilution device according to claim 4, characterized in that: The heating rod inserted inside the constant temperature heating module is 100W, the second temperature sensing probe is PT100, and the thickness of the insulation material wrapped outside is 3mm.

6. A gas pulse dilution device according to claim 5, characterized in that: The flow rate of the constant flow pump is 0-3.0 L / min, and the thickness of the external insulation material is 3 mm.

7. A gas pulse dilution device according to claim 6, characterized in that: The constant temperature heating module is wound with 20 turns of Φ1.62 stainless steel pipeline.

8. A gas pulse dilution method, characterized in that: The gas pulse dilution device according to any one of claims 1 to 7 comprises the following steps: S1: Pre- or post-sample cleaning: Cleaning of internal pipes is determined based on sample type; S2: Injection operation: select the internal injection pipeline and injection method according to the sample type; S3: Valve cleaning operation: After the sample operation is completed or the instrument is stopped, select the sample valve number that needs to be cleaned, press the valve cleaning button, and open all the selected sample valves in each group according to the cleaning time until all the selected sample valves are cleaned; S4: Bag cleaning operation: After the sample operation is completed or the instrument is stopped, select the sample bag number to be cleaned, press the bag cleaning button, and the instrument will fill and discharge the cleaning gas according to the selected bag cleaning times until all cleaning is completed; S5: Constant temperature operation: select constant temperature for cleaning gas and mixing bottle heating, heat up to constant temperature according to the set temperature, and then start other operations; S6: Dilution gas filling operation: Press the filling button, the instrument automatically fills the dilution gas bag with dilution gas. This button is invalid when the operation light is on.

9. A gas pulse dilution method according to claim 8, characterized in that: The specific steps of S1 are: SS1: Calibration sample: Open valves J46, J49, J50 and J56, and clean according to the cleaning time before or after the sample. After cleaning, close all solenoid valves and wait for the cleaning balance time before performing other operations; SS2: Diluted sample: Open valves J46, J49, J50 and J56, and search for the corresponding group number according to the sample number, open the corresponding cleaning valves above and below, and clean according to the time set in the method. After cleaning, close the valves. After cleaning, wait for the cleaning balance time in the method before performing other operations; SS3: Air bag sample: Find the corresponding group number according to the sample number, open the corresponding cleaning valves at the top and bottom, and open the J46 valve at the same time, clean according to the time set in the method, and close the valve when cleaning is completed. After cleaning, wait for the cleaning balance time in the method before performing other operations; SS4: Ball bladder sample: Find the corresponding group number according to the sample number, open the corresponding upper and lower cleaning valves, open the J46 valve at the same time, clean according to the time set in the method, close the valve when finished, and wait for the cleaning balance time in the method before performing other operations after cleaning.

10. A gas pulse dilution method according to claim 9, characterized in that: The specific steps of S2 are: SS1: Standard sample: Select the sample type as standard sample, select the dilution ratio, open the J48 valve and J47 valve according to the pulse ratio, open J49, J50, J56 and the constant flow pump at the same time, inject the sample into the detection instrument according to the injection time, and wait for the injection balance time after injection before sending the injection signal to the chromatograph or mass spectrometer; SS2: Diluted sample: Select the sample type as diluted sample, select the dilution ratio, open the valve corresponding to the sample and J47 valve according to the pulse ratio, open J49 and the lower cleaning valve corresponding to the sample group at the same time, and open J50, J56 and the constant flow pump, inject the sample into the detection instrument according to the injection time, and wait for the injection balance time after injection before sending the injection signal to the chromatograph or mass spectrometer; SS3: Air bag sample: Select the sample type as air bag sample, open the sample gas valve corresponding to the sample and the lower cleaning valve corresponding to the sample group, and turn on the constant flow pump at the same time, inject the sample into the detection instrument according to the injection time, and wait for the injection balance time after injection before sending the injection signal to the chromatograph or mass spectrometer; SS4: Ball bladder sample: Select the sample type as ball bladder sample, open the sample gas valve corresponding to the sample and the lower cleaning valve corresponding to the sample group, inject the sample into the detection instrument according to the injection time, and wait for the "injection balance time" after injection before sending the injection signal to the chromatograph or mass spectrometer; The operation light is turned on during all the above operations, and the valve cleaning and bag cleaning buttons are invalid during operation.

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