Multi-channel full-automatic vacuum gas sampler

Abstract

The utility model discloses a multi-channel full-automatic vacuum gas sampler which comprises a vacuum sampler main machine, a multi-connected vacuum sampling box and a sampling gun, a sampling control system, an air pump valve area, a sampling valve area and a power supply area are arranged in the vacuum sampler host, the power supply area is connected with the sampling control system, one end of the air pump valve area and one end of the sampling valve area are connected with the sampling control system, and the other end of the air pump valve area and the other end of the sampling valve area are connected with the multi-connected vacuum sampling box; the sampling gun is communicated with a sampling gun interface on the vacuum sampler main machine through a sampling gun connecting pipe; the multi-connected vacuum sampling box is formed by stacking and combining three single vacuum sampling boxes through quick interfaces. According to the utility model, the air pump valve area and the sampling valve area can be automatically controlled through the sampling control system, so that controllable automatic sample collection and automatic cleaning of the sample air bag are realized, and the automation and intelligence levels of an environment monitoring air bag collection method are effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of environmental protection, and in particular relates to a multi-channel full-automatic vacuum gas sampler. Background Art

[0002] The main sampling method for environmental monitoring of malodorous gases is based on the "Air Bag Sampling Method for Volatile Organic Compounds in Waste Gas from Stationary Pollution Sources" (HJ732-2014). Most of the conventional air bag samplers currently in use are purely manually operated, single-channel, and have no automatic cleaning function. In actual monitoring work, when performing multi-frequency sampling of odors in accordance with the "Technical Specifications for Environmental Monitoring of Odor Pollution" (HJ905-2017), it often requires a lot of manpower investment.

[0003] In order to monitor the air quality of our living environment, the state has strengthened the management of volatile organic compounds from fixed pollution sources and issued relevant management standards. At present, the vacuum sampler designed based on HJ732-2014 "Sampling Bag Method for Volatile Organic Compounds in Exhaust Gas from Fixed Pollution Sources" has been found to have a large error between the extracted gas and the sample gas when it is implemented according to the standard requirements and principles, and it cannot be consistent, and the operation of personnel is cumbersome, which affects the efficiency of use. Summary of the invention

[0004] The purpose of the utility model is to address the deficiencies of the above-mentioned prior art and to provide a multi-channel fully automatic vacuum gas sampler, which can realize the automation of the entire sample gas collection process and the sampling gas bag cleaning process; by washing the sampling gun and related pipelines before sampling, the error between the extracted gas and the sample gas can be effectively reduced, and the operation is simple and easy to use.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A multi-channel fully automatic vacuum gas sampler, comprising a vacuum sampler mainframe, a multi-connected vacuum sampling box and a sampling gun; the sampling gun is connected to a sampling gun interface on the vacuum sampler mainframe through a sampling gun connecting tube; a sampling control system, an air pump valve area, a sampling valve area and a power supply area are arranged inside the vacuum sampler mainframe, the power supply area is connected to the sampling control system, one end of the air pump valve area and the sampling valve area is connected to the sampling control system through a line, and the other end of the air pump valve area and the sampling valve area is connected to the multi-connected vacuum sampling box through a pipeline; the air pump valve area comprises a flow regulating vacuum pump, an airflow switching three-way valve I, an airflow switching three-way valve II, an airflow channel valve I, an airflow channel valve II and an airflow channel valve III; the airflow channel valve Ⅰ. The first channels of airflow channel valves Ⅱ and Ⅲ are respectively connected to the airflow channel Ⅰ interface, the airflow channel Ⅱ interface and the airflow channel Ⅲ interface on the vacuum sampler host, and the second channels of airflow channel valves Ⅰ, Ⅱ and Ⅲ are all connected in parallel to the first channel of the airflow switching three-way valve Ⅰ through pipelines; the second channel of the airflow switching three-way valve Ⅰ is connected to the exhaust port of the flow regulating vacuum pump through a pipeline, and the exhaust port of the flow regulating vacuum pump is connected to the first channel of the airflow switching three-way valve Ⅱ through a pipeline, and the third channel of the airflow switching three-way valve Ⅰ is connected in parallel with the second channel of the airflow switching three-way valve Ⅱ through a pipeline, and is connected to the vacuum pump exhaust / suction port on the vacuum sampler host; the airflow switching The third channel of the three-way valve II is connected in parallel with the second channels of the airflow channel valve I, the airflow channel valve II and the airflow channel valve III through a pipeline; the sampling valve area includes the sample three-way valve I, the sample three-way valve II and the sample three-way valve III; the first channels of the sample three-way valve I, the sample three-way valve II and the sample three-way valve III are respectively connected to the sample channel I interface, the sample channel II interface and the sample channel III interface on the vacuum sampler host; the second channels of the sample three-way valve I, the sample three-way valve II and the sample three-way valve III are connected to the sampling gun interface on the vacuum sampler host through a pipeline; the third channels of the sample three-way valve I, the sample three-way valve II and the sample three-way valve III are connected in parallel through a pipeline and are connected to the air bag cleaning exhaust port on the vacuum sampler host. The air ports are connected; the multi-connected vacuum sampling box is composed of three single vacuum sampling boxes stacked together by quick interfaces, each of which is provided with a sampling interface and a vacuum interface on the outside, each of which is provided with an air bag inside, and each of which is provided with an air bag interface, one end of the air bag interface is connected to the air bag, and the other end is connected to the outlet of the sampling interface; the inlets of the three sampling interfaces are connected to the sample channel I interface, the sample channel II interface and the sample channel III interface on the vacuum sampler main unit through pipelines; the three vacuum interfaces are connected to the airflow channel I interface, the airflow channel II interface and the airflow channel III interface on the vacuum sampler main unit through pipelines.

[0007] Preferably, the power supply area includes a lithium battery pack and a power control module, the power control module is connected to the lithium battery pack through a line, and the lithium battery pack is connected to the sampling control system through a line; the power control module includes a host power switch, a standard power input port and a standard power output port, the standard power input port is the charging interface of the vacuum sampler host, and the standard power output port is the power interface of the video surveillance network camera, which is convenient for real-time monitoring during the automatic sampling process. The standard power input port is specifically a standard 220V power input port, and the standard power output port is specifically a standard 5.0V USB power output port.

[0008] Preferably, the multi-connected vacuum sampling box is composed of three single vacuum sampling boxes stacked together through a quick interface; the lid of the single vacuum sampling box is sealed to the top of its box body, and the top of the lid of the single vacuum sampling box and the bottom of the box body of the single vacuum sampling box are provided with sliding slots that match each other.

[0009] Preferably, the sampling gun is provided with a sampling gun barrel, the sampling gun barrel is made of stainless steel, the inner layer material of the sampling gun connecting tube is perfluororesin, the outer layer material of the sampling gun connecting tube is high temperature resistant silicone rubber, and the sampling gun is provided with an external power supply interface.

[0010] Preferably, the sampling control system is a programmable controller, which is provided with an operation panel, on which are respectively provided a leak detection mode start key, a sample collection start key and an air bag cleaning start key, and the leak detection mode start key, the sample collection start key and the air bag cleaning start key are all connected to the programmable controller.

[0011] The beneficial effects of the utility model are:

[0012] (1) The utility model complies with the requirements of the "Gas Bag Sampling Method for Volatile Organic Compounds in Exhaust Gas from Stationary Pollution Sources" (HJ732-2014). The vacuum pumping channel and the sample channel are completely separated, and the sampling bag can be automatically charged and discharged three times for cleaning and sample collection. The pipe material used in the sampling valve area is all perfluororesin, which can avoid contamination of the sample by the pipe;

[0013] (2) The utility model controls the operation of the air pump valve area and the sampling valve area by sending instructions to the controller by pressing the sample collection start button and the air bag cleaning start button, thereby automating the entire sample gas collection process and the air bag cleaning process, which is simple to operate and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a plan view of the utility model;

[0015] Figure 2 It is a side schematic diagram of a single vacuum sampling box in the utility model;

[0016] In the figure, 1, vacuum sampler host; 2, multi-connected vacuum sampling box; 3, sampling gun; 11, sampling control system; 12, air pump valve area; 13, sampling valve area; 14, flow regulating vacuum pump; 15, air flow switching three-way valve I; 16, air flow switching three-way valve II; 17, air flow channel valve I; 18, air flow channel valve II; 19, air flow channel valve III; 20, sample channel valve I; 21, sample channel valve II; 22, sample channel valve III; 23 lithium battery pack; 24, power control module; 25, host power switch; 26, standard power input port; 27. Standard power output port; 28. Sampling gun barrel; 29. ​​Sampling gun connecting tube; 30. Single vacuum sampling box; 31. Air bag; 32. Sliding card slot; 101. Air bag cleaning exhaust port; 102. Vacuum pump exhaust / suction port; 103. Air flow channel I interface; 104. Air flow channel II interface; 105. Air flow channel III interface; 106. Sample channel I interface; 107. Sample channel II interface; 108. Sample channel III interface; 109. Sampling gun interface; 110. Sampling interface; 111. Vacuum interface; 112. Air bag interface. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but the protection scope of the present invention is not limited to the following examples:

[0018] like Figure 1-2 As shown, the multi-channel fully automatic vacuum gas sampler of the utility model includes a vacuum sampler main unit 1, a multi-connected vacuum sampling box 2 and a sampling gun 3; the sampling gun 3 is connected to the sampling gun interface 109 on the vacuum sampler main unit 1 through a sampling gun connecting tube 29, and a sampling gun barrel 28 is provided on the sampling gun 3. The material of the sampling gun barrel 28 is stainless steel, the inner layer material of the sampling gun connecting tube 29 is perfluororesin, and the outer layer material of the sampling gun connecting tube 29 is high temperature resistant silicone rubber. The sampling gun 3 is provided with an external power supply interface and has a heating function.

[0019] The vacuum sampler host 1 in the utility model is provided with a sampling control system 11, an air pump valve area 12, a sampling valve area 13 and a power supply area inside. The power supply area is connected to the sampling control system 11, and one end of the air pump valve area 12 and the sampling valve area 13 is connected to the sampling control system 11 through a line, and the other end of the air pump valve area 12 and the sampling valve area 13 is connected to the multi-connected vacuum sampling box 2 through a pipeline.

[0020] The air pump valve area 12 in the utility model includes a flow regulating vacuum pump 14, an airflow switching three-way valve I 15, an airflow switching three-way valve II 16, an airflow channel valve I 17, an airflow channel valve II 18 and an airflow channel valve III 19, so as to achieve orderly control.

[0021] The first channels of the airflow channel valve I17, the airflow channel valve II18 and the airflow channel valve III19 in the utility model are respectively connected to the airflow channel I interface 103, the airflow channel II interface 104 and the airflow channel III105 interface on the vacuum sampler main unit 1, and the second channels of the airflow channel valve I17, the airflow channel valve II18 and the airflow channel valve III19 are all connected in parallel to the first channel of the airflow switching three-way valve I15 through pipelines; the second channel of the airflow switching three-way valve I15 is connected to the exhaust port of the flow regulating vacuum pump 14 through a pipeline, and the exhaust port of the flow regulating vacuum pump 14 is connected to the first channel of the airflow switching three-way valve II16 through a pipeline, the third channel of the airflow switching three-way valve I15 is connected in parallel with the second channel of the airflow switching three-way valve II16 through a pipeline, and is connected to the vacuum pump exhaust / intake port 102 on the vacuum sampler main unit 1; the third channel of the airflow switching three-way valve II16 is connected in parallel with the second channels of the airflow channel valve I17, the airflow channel valve II18 and the airflow channel valve III19 through a pipeline. The first channel of the airflow channel valve I17, the airflow channel valve II18 and the airflow channel valve III19 referred to in the present application is the upper channel of the airflow channel valve I17, the airflow channel valve II18 and the airflow channel valve III19; the second channel of the airflow channel valve I17, the airflow channel valve II18 and the airflow channel valve III19 referred to in the present application is the lower channel of the airflow channel valve I17, the airflow channel valve II18 and the airflow channel valve III19.

[0022] The sampling valve area 13 in the utility model comprises a sample three-way valve I 20 , a sample three-way valve II 21 and a sample three-way valve III 22 .

[0023] The first channels of the sample three-way valve I20, the sample three-way valve II21 and the sample three-way valve III22 in the utility model are respectively connected to the sample channel I interface 106, the sample channel II interface 107 and the sample channel III interface 108 on the vacuum sampler host 1; the second channels of the sample three-way valve I20, the sample three-way valve II21 and the sample three-way valve III22 are connected to the sampling gun interface 109 on the vacuum sampler host 1 through a pipeline; the third channels of the sample three-way valve I20, the sample three-way valve II21 and the sample three-way valve III22 are connected in parallel through a pipeline and are connected to the air bag cleaning exhaust port 101 on the vacuum sampler host 1. The pipe material used in the sampling valve area 13 is all perfluororesin.

[0024] The first channel of the airflow switching three-way valve II16, the sample three-way valve I20, the sample three-way valve II21 and the sample three-way valve III22 referred to in the utility model is the upper channel of the airflow switching three-way valve II16, the sample three-way valve I20, the sample three-way valve II21 and the sample three-way valve III22; the second channel of the airflow switching three-way valve II16, the sample three-way valve I20, the sample three-way valve II21 and the sample three-way valve III22 referred to in the utility model is the lower channel of the airflow switching three-way valve II16, the sample three-way valve I20, the sample three-way valve II21 and the sample three-way valve III22; The third channel of the three-way valve II16, the sample three-way valve I20, the sample three-way valve II21 and the sample three-way valve III22 is the right channel of the airflow switching three-way valve II16, the sample three-way valve I20, the sample three-way valve II21 and the sample three-way valve III22; the first channel of the airflow switching three-way valve I15 referred to in the utility model is the upper channel of the airflow switching three-way valve I15; the second channel of the airflow switching three-way valve I15 referred to in the utility model is the lower channel of the airflow switching three-way valve I15; the third channel of the airflow switching three-way valve I15 referred to in the utility model is the left channel of the airflow switching three-way valve I15.

[0025] The multi-connected vacuum sampling box 2 in the utility model is composed of three single vacuum sampling boxes 30 stacked together through a quick interface. The lid of the single vacuum sampling box 30 is sealed with the top of its box body. The top of the lid of the single vacuum sampling box 30 and the bottom of the box body of the single vacuum sampling box 30 are provided with sliding slots 32 that match each other, so that the three single vacuum sampling boxes 30 can be quickly stacked and combined.

[0026] Each single vacuum sampling box 30 in the present utility model is provided with a sampling interface 110 and a vacuum interface 111 on the outside, an air bag 31 is provided inside each single vacuum sampling box 30, and an air bag interface 112 is provided on each single vacuum sampling box 30, one end of the air bag interface 112 is connected to the air bag 31, and the other end is connected to the outlet of the sampling interface 110; the inlets of the three sampling interfaces 110 are respectively connected to the sample channel I interface 106, the sample channel II interface 107 and the sample channel III interface 108 on the vacuum sampler host 1 through pipelines; the three vacuum interfaces 111 are respectively connected to the air flow channel I interface 103, the air flow channel II interface 104 and the air flow channel III interface 105 on the vacuum sampler host 1 through pipelines. The air bag interface 112 is a nut interface adapted to a standard sampling air bag; the single vacuum sampling box 30 has different volumes to meet the requirements of the air bag 31 for sampling of different volumes.

[0027] The power supply area in the utility model includes a lithium battery pack 23 and a power control module 24. The power control module 24 is connected to the lithium battery pack 23 through a line, and the lithium battery pack 23 is connected to the instrument control system 11 through a line; the power control module 24 includes a host power switch 25, a standard 220V power input port 26 and a standard 5.0V USB power output port 27. The standard power input port 26 is the charging interface of the vacuum sampler host 1, and the standard power output port 27 is the power interface of the video surveillance network camera, which is convenient for real-time monitoring during the automatic sampling process.

[0028] The sampling control system 11 in the utility model is a programmable controller, and an operation panel is provided on the programmable controller. The operation panel is respectively provided with a leak detection mode start key, a sample collection start key and an air bag cleaning start key, and the leak detection mode start key, the sample collection start key and the air bag cleaning start key are all connected to the programmable controller. When the air bags 31 of the three sampling channels corresponding to the leak detection mode start key can be inflated and emptied normally, it is confirmed that the airtightness of the instrument is good and sample collection can be carried out. The sample collection start key corresponds to the sample gas collection process, and the air bag cleaning start key corresponds to the cleaning process of the air bag 31.

[0029] The utility model realizes the use process of automatically collecting three frequencies of malodorous gas samples according to the requirements of HJ732-2014 and HJ905-2017 as follows:

[0030] The first step is to test the airtightness of the gas circuit: the vacuum sampler host 1 has an automatic leak detection function. Turn on the host power switch 25, press the leak detection mode start button, and the sampling control system 11 will perform leak detection tests on the three sample channels, namely, the sample channel I interface 106, the sample channel II interface 107, and the sample channel III interface 108. When it is confirmed that the air bags 31 of the three sampling channels can be inflated and emptied normally, it is confirmed that the instrument is well-sealed and sample collection can be carried out.

[0031] The second step is point layout: according to the monitoring standard requirements, the sampling gun barrel 28 is inserted into the sampling port of the organized exhaust gas emission source or placed at a suitable height at the monitoring point of the unorganized exhaust gas emission source; when sampling the unorganized exhaust gas emission source, it should be synchronously deployed at different unorganized monitoring points to achieve the purpose of synchronous sampling.

[0032] Step 3, the cleaning process of the air bag 31: sampling begins, the channel of the sample three-way valve I20 of the sampling valve area 13 is opened; the airflow switching three-way valve I15 and the airflow switching three-way valve II16 of the air pump valve area 12 both open the first channel and the second channel, the airflow channel valve I17 is opened, the flow regulating vacuum pump 14 is turned on, and the flow is automatically adjusted to the instrument setting value. At this time, the air in a single vacuum sampling box 30 corresponding to the sampling valve area 13 and the air pump valve area 12 is discharged by the air pump through the vacuum pump exhaust / suction port 102, the air pressure of the single vacuum sampling box 30 is reduced, and the sample gas is filled into the air bag 31 of the single vacuum sampling box 30 through the sampling gun 3. According to the set flow rate and the volume of the sampled air bag 31, when the sampling control system 11 determines that the air bag has been filled with gas to 80%, the flow regulating vacuum pump 14 is shut down. The first channel and the second channel of the sample three-way valve I20 of the sampling valve area 13 are opened; the airflow switching three-way valve I15 of the air pump valve area 12 is switched to open the second channel and the third channel, the airflow switching three-way valve II16 is switched to open the first channel and the third channel, the flow regulating vacuum pump 14 is restarted, and air is filled into the single vacuum sampling box 30 from the vacuum pump exhaust / intake port 102. Under the action of air pressure, the sample gas in the air bag 31 is squeezed to the air bag cleaning exhaust port 101 for discharge. According to the set flow rate and the volume of the sampled air bag 31, when the sampling control system 11 determines that the air bag has been emptied, the flow regulating vacuum pump 14 is stopped to complete the first cleaning of the sample air bag 31. Similarly, according to HJ732-2014, a total of three cleanings of the air bag 31 need to be completed to reduce sample loss and interference caused by adsorption on the inner surface of the air bag 31.

[0033] Step 4, complete the collection of the first sample: sampling officially begins, the channel of the sample three-way valve I20 of the sampling valve area 13 is opened; the airflow switching three-way valve I15 and the airflow switching three-way valve II16 of the air pump valve area 12 both open the first channel and the second channel, the airflow channel valve I17 is opened, the flow regulating vacuum pump 14 is turned on, and the flow is automatically adjusted to the instrument setting value. At this time, the air in a single vacuum sampling box 30 corresponding to the sampling valve area 13 and the air pump valve area 12 is discharged by the air pump through the vacuum pump exhaust / suction port 102, the air pressure in the single vacuum sampling box 30 is reduced, and the sample gas is filled into the air bag 31 of the single vacuum sampling box 30 through the sampling gun 3. According to the set flow rate and the volume of the sampled air bag 31, when the sampling control system 11 determines that the air bag 31 has been filled with gas to 80%, the flow regulating vacuum pump 14 is shut down, all valve groups are closed, and the first sample is collected.

[0034] Collection of the second and third samples. After the system determines that it has reached the set point between the second and third samples, the instrument automatically switches the sampling channel to the second and third vacuum sampling boxes with reference to the collection process of the first sample. After the three cleanings of the air bag 31 are completed, the second and third samples are collected respectively. After completing the collection of all samples, the monitoring personnel remove the air bag 31 according to the specifications, and after sealing, they can be sent to the laboratory for analysis.

[0035] Other unexplained parts of the present invention are the same as those of the prior art.

Claims

1. A multi-channel fully automatic vacuum gas sampler, characterized in that It comprises a vacuum sampler main unit (1), a multi-connected vacuum sampling box (2) and a sampling gun (3); the sampling gun (3) is connected to a sampling gun interface (109) on the vacuum sampler main unit (1) via a sampling gun connecting tube (29); a sampling control system (11), an air pump valve area (12), a sampling valve area (13) and a power supply area are arranged inside the vacuum sampler main unit (1); the power supply area is connected to the sampling control system (11); one end of the air pump valve area (12) and the sampling valve area (13) is connected to the sampling control system (11) via a line; the other end of the air pump valve area (12) and the sampling valve area (13) is connected to the multi-connected vacuum sampling box (11) via a pipeline. 2) is connected; the air pump valve area (12) includes a flow regulating vacuum pump (14), an air flow switching three-way valve I (15), an air flow switching three-way valve II (16), an air flow channel valve I (17), an air flow channel valve II (18) and an air flow channel valve III (19); the first channels of the air flow channel valve I (17), the air flow channel valve II (18) and the air flow channel valve III (19) are respectively connected to the air flow channel I interface (103), the air flow channel II interface (104) and the air flow channel III interface (105) on the vacuum sampler host (1), and the second channels of the air flow channel valve I (17), the air flow channel valve II (18) and the air flow channel valve III (19) are connected in parallel to the air flow channel interface (103), the air flow channel II interface (104) and the air flow channel III interface (105) on the vacuum sampler host (1). The first channel of the airflow switching three-way valve I (15); the second channel of the airflow switching three-way valve I (15) is connected to the exhaust port of the flow regulating vacuum pump (14) through a pipeline, the exhaust port of the flow regulating vacuum pump (14) is connected to the first channel of the airflow switching three-way valve II (16) through a pipeline, the third channel of the airflow switching three-way valve I (15) is connected in parallel with the second channel of the airflow switching three-way valve II (16) through a pipeline, and is connected to the vacuum pump exhaust / intake port (102) on the vacuum sampler host (1); the third channel of the airflow switching three-way valve II (16) is connected to the airflow channel valve I (17) and the airflow channel valve II (18) through a pipeline. and connected in parallel with the second channel of the air flow channel valve III (19); the sampling valve area (13) includes a sample three-way valve I (20), a sample three-way valve II (21) and a sample three-way valve III (22); the first channels of the sample three-way valve I (20), the sample three-way valve II (21) and the sample three-way valve III (22) are respectively connected to the sample channel I interface (106), the sample channel II interface (107) and the sample channel III interface (108) on the vacuum sampler main unit (1); the second channels of the sample three-way valve I (20), the sample three-way valve II (21) and the sample three-way valve III (22) are connected to the sampling gun interface (109) on the vacuum sampler main unit (1) through a pipeline;The third channels of the sample three-way valve I (20), the sample three-way valve II (21) and the sample three-way valve III (22) are connected in parallel through pipelines and are connected to the air bag cleaning exhaust port (101) on the vacuum sampler main unit (1); the multi-connected vacuum sampling box (2) is composed of three single vacuum sampling boxes (30) stacked together through a quick interface, and each of the single vacuum sampling boxes (30) is provided with a sampling interface (110) and a vacuum interface (111) on the outside, and each of the single vacuum sampling boxes (30) is provided with an air bag (31) inside, and each of the single vacuum sampling boxes (30) is provided with an air bag interface (111). 12), one end of the air bag interface (112) is connected to the air bag (31), and the other end is connected to the outlet of the sampling interface (110); the inlets of the three sampling interfaces (110) are respectively connected to the sample channel I interface (106), the sample channel II interface (107) and the sample channel III interface (108) on the vacuum sampler host (1) through pipelines; the three vacuum interfaces (111) are respectively connected to the air flow channel I interface (103), the air flow channel II interface (104) and the air flow channel III interface (105) on the vacuum sampler host (1) through pipelines. ; 2. The multi-channel fully automatic vacuum gas sampler according to claim 1 is characterized in that The power supply area includes a lithium battery pack (23) and a power control module (24), wherein the power control module (24) is connected to the lithium battery pack (23) via a line, and the lithium battery pack (23) is connected to the sampling control system (11) via a line; the power control module (24) includes a host power switch (25), a standard power input port (26) and a standard power output port (27), wherein the standard power input port (26) is a charging interface of the vacuum sampler host (1), and the standard power output port (27) is a power interface of a video surveillance network camera.

3. The multi-channel fully automatic vacuum gas sampler according to claim 1 is characterized in that The multi-connected vacuum sampling box (2) is composed of three single vacuum sampling boxes (30) stacked together via a quick interface; the lid of the single vacuum sampling box (30) is sealed to the top of its box body, and the top of the lid of the single vacuum sampling box (30) and the bottom of the box body of the single vacuum sampling box (30) are both provided with sliding slots (32) that match each other.

4. The multi-channel fully automatic vacuum gas sampler according to claim 1 is characterized in that The sampling gun (3) is provided with a sampling gun barrel (28), the sampling gun barrel (28) is made of stainless steel, the inner layer material of the sampling gun connecting tube (29) is perfluororesin, the outer layer material of the sampling gun connecting tube (29) is high temperature resistant silicone rubber, and the sampling gun (3) is provided with an external power supply interface.

5. The multi-channel fully automatic vacuum gas sampler according to claim 1 is characterized in that The sampling control system (11) is a programmable controller, and an operation panel is provided on the programmable controller. A leak detection mode start key, a sample collection start key, and an air bag cleaning start key are respectively provided on the operation panel. The leak detection mode start key, the sample collection start key, and the air bag cleaning start key are all connected to the programmable controller.

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