Monitoring device and method for trace gas enrichment of in-situ Antarctic ice layer while drilling

Abstract

The invention relates to a while-drilling in-situ trace gas enrichment monitoring device and method for an antarctic ice layer, which belongs to the technical field of environmental monitoring, and realizes in-situ enrichment and monitoring of trace gas in the antarctic ice layer through the combination of a bionic bird lung chamber, an air pump and a bionic preconcentrator in the drilling process. The device adopts a gas dynamics principle optimized by a Murry law, ensures the optimal contact between gas molecules and an adsorption material, and improves the enrichment efficiency and the detection sensitivity. The pollution risk in the sample transportation process can be avoided, the complexity of sample pretreatment is reduced, the monitoring sensitivity and reliability are high, the method is suitable for field real-time monitoring under the extreme environment condition, and an important tool is provided for South Pole environment change research.

Description

Technical Field

[0001] The invention belongs to the technical field of environmental monitoring, and in particular relates to a monitoring device and method for in-situ Antarctic ice layer trace gas enrichment while drilling. Background Art

[0002] As global climate change intensifies, environmental monitoring in the Antarctic region has become particularly important. Antarctica, the most primitive and extreme environment on Earth, has a unique climate and ecosystem that is highly sensitive to environmental changes. Monitoring trace gases in Antarctic ice is of great significance for understanding global climate change, studying paleoclimate and atmospheric composition changes. For example, gases such as carbon dioxide and methane in the ice can provide important information about past atmospheric composition and climate change. Changes in carbon dioxide concentrations can reveal historical greenhouse effects and climate warming trends, while methane is a potent greenhouse gas, and its historical concentration changes are of great significance for understanding the Earth's climate system. However, due to the remote geographical location and extreme climatic conditions of Antarctica, traditional ice trace gas monitoring methods face many challenges in Antarctica. For example, equipment transportation is difficult, the extreme low temperature environment causes equipment to malfunction easily, and it is difficult to perform routine sample processing. These factors limit the application of existing monitoring methods in the Antarctic environment, and a new and efficient ice trace gas monitoring technology is urgently needed. At present, conventional ice trace gas monitoring methods usually rely on on-site sampling and transporting samples back to the laboratory for analysis. This process is not only time-consuming and labor-intensive, but there is also a risk that samples may be contaminated or deteriorate during transportation, thus affecting the accuracy and reliability of the monitoring results.

[0003] The drilling monitoring technology in the present invention greatly reduces the risk of sample contamination or degradation by monitoring in-situ Antarctic ice samples during the drilling process, and is very suitable for application in the extreme environment of Antarctica. This technology avoids the complicated sample pretreatment process and reduces the dependence on expensive laboratory equipment, making it an ideal choice for monitoring Antarctic ice gas. Through the combination of drilling monitoring technology and real-time pre-concentration equipment, trace gases in the ice layer can be directly collected and enriched during the drilling process, thereby achieving efficient and accurate on-site monitoring. This technology can not only improve monitoring efficiency and reduce sample processing time, but also ensure the accuracy and reliability of monitoring results.

[0004] Pre-concentration is of great significance in trace gas detection. It can effectively capture and increase the concentration of trace gases in samples, thereby improving the sensitivity and accuracy of monitoring devices. Current pre-concentrators are usually based on traditional engineering designs, but after introducing the principles of bionics, a new type of pre-concentrator has been developed. This device imitates the fluid transmission system in nature and combines specific adsorption materials with structural design to more effectively capture and pre-concentrate trace gases in the ice layer. In addition, the introduction of bionic bird lung technology further reduces the waste of trace gases, thereby improving the sensitivity and reliability of the monitoring system under extreme low temperature conditions while avoiding increased operational complexity. This new type of equipment, which combines bionic pre-concentrators with bionic bird lung technology, is particularly suitable for high-precision ice gas monitoring under complex environmental conditions such as the Antarctic, and will help scientists gain a deeper understanding of the impact of climate change on the Antarctic environment.

[0005] In the face of the problems of insufficient sensitivity, complex operation, and inability to achieve on-site real-time monitoring in existing ice layer trace gas monitoring technologies, the present invention adopts an innovative design that combines bionic bird lung technology with the principle of Maury's law, which not only greatly improves the sensitivity and efficiency of drilling monitoring, but also provides a key technical solution for high-precision ice layer gas monitoring under complex environmental conditions. Therefore, the development of a device that integrates a bionic pre-concentrator and bionic bird lung technology has become a major technical problem in solving real-time ice layer trace gas monitoring. Summary of the invention

[0006] The present invention combines bionic pre-concentrator and bionic bird lung technology, utilizes the gas dynamics principle optimized by Maury's law, and proposes a device and method for highly sensitive, economical and efficient, stable and reliable, and capable of quickly and accurately implementing wide-area in-situ monitoring of trace gases in Antarctic ice while drilling.

[0007] The present invention discloses a monitoring device for in-situ Antarctic ice layer trace gas enrichment while drilling, which is composed of a bionic bird lung chamber IA1, a trachea IA1a, an air pump IB1, a shell IC1, a motor 2, a rotating bracket D, a bionic pre-concentrator group E, a top cover group F, a shell IC2, an air pump IB2, a trachea IA1b, a bionic bird lung chamber IA2 and an optical monitoring instrument 3. The support D, the housing ⅡC2, the air pump ⅡB2, the bionic bird lung chamber ⅡA2 and the optical monitoring instrument 3 are arranged in order from front to back; the air pump ⅠB1 is fixedly connected to the support Ⅰ8 of the bionic bird lung chamber ⅠA1, and the air pump ⅡB2 is fixedly connected to the support Ⅰ of the bionic bird lung chamber ⅡA2; the front end of the trachea Ⅰ1a is connected to the air inlet Ⅱ7, and the rear end of the trachea Ⅰ1a is connected to the air inlet 17 of the bionic pre-concentrator ⅠE1 of the bionic pre-concentrator group E; the The front end is communicated with the air inlet Ⅱ7, and the rear end of the trachea Ⅱ1b is communicated with the air inlet pipe 17 of the bionic pre-concentrator ⅡE2 of the bionic pre-concentrator group E; the middle part of the trachea Ⅰ1a is connected to the guide rail Ⅰ10a of the shell ⅠC1 and the shell ⅡC2; the middle part of the trachea Ⅱ1b is connected to the guide rail Ⅱ10b of the shell ⅠC1 and the shell ⅡC2; the output shaft of the motor 2 is interference connected with the center hole 11 of the rotating bracket D, the front end of the motor 2 is fixedly connected to the rear end of the center hole Ⅰ11 of the shell ⅠC1, and the hole pair 15 of the rotating bracket D corresponds to the rear end hole pair of the motor 2, which is used to determine the installation position reference of the motor 2; the perforated threaded plates of the bionic pre-concentrator ⅣE4, the bionic pre-concentrator ⅠE1, the bionic pre-concentrator ⅢE3 and the bionic pre-concentrator ⅡE2 in the bionic pre-concentrator group E are respectively fixedly connected to the upper, lower, left and right sides of the shell 12 of the rotating bracket D in sequence; the rear end of the shell ⅠC1 and the front end of the shell ⅡC2 are threadedly connected.

[0008] The bionic bird lung chamber IA1 and the bionic bird lung chamber IA2 have the same structure but opposite directions, and are both composed of an air storage tank 4 and a bracket Ⅰ8, which are arranged front and back and fixedly connected; a central air inlet Ⅰ6 is provided at the front end of the air storage tank 4, an air inlet Ⅱ7 is provided on the right side of the air storage tank 4, and an air outlet Ⅰ5 is provided at the center of the rear end of the air storage tank 4.

[0009] The shell IC1 and the shell IC2 have the same structure and opposite directions. The shells 9 of the shells IC1 and IC2 are both disc-shaped, and the end faces of the shells 9 are provided with a central hole Ⅰ11 and 4-6 holes of a side hole group 10.

[0010] The rotating bracket D is composed of an outer shell 12 and a reinforcing rib 13. The outer shell 12 is a square hollow tube. The reinforcing rib 13 is fixedly connected to the center of the square hollow tube of the outer shell 12. The reinforcing rib 13 is provided with a center hole II 14 and two holes of a hole pair 15. The 12-16 holes of the hole group 16 are provided on the left and right sides of the square hollow tube and the four sides of the rotating bracket D.

[0011] The bionic preconcentrator group E is composed of bionic preconcentrators ⅠE1, ⅡE2, ⅢE3 and ⅣE4 with the same structure. Each bionic preconcentrator is composed of an air inlet pipe 17, a bracket Ⅲ18, an enrichment structure 19 that complies with Maury's law, a threaded hole plate 20 and an air outlet pipe 21. The air inlet pipe 17, the bracket Ⅲ18 and the air outlet pipe 21 are arranged in sequence from front to back and fixedly connected; the threaded hole plate 20 is embedded in the bracket Ⅲ18, and the enrichment structure 23 that complies with Maury's law is fixedly connected to the center of the threaded hole plate 20; the enrichment structure 19 that complies with Maury's law consists of a first stage The top cover group F is composed of four top covers, and the four top covers are respectively threadedly connected to the threaded hole plates of bionic pre-concentrator ⅠE1, bionic pre-concentrator ⅡE2, bionic pre-concentrator ⅢE3 and bionic pre-concentrator ⅣE4.

[0012] The monitoring method based on the in-situ Antarctic ice layer trace gas enrichment monitoring device while drilling of the present invention comprises the following steps:

[0013] 1. The gas to be tested enters the bionic bird lung chamber IA1 and is introduced into the bionic pre-concentrator IE1 through the air pump IB1. The flow rate is controlled at 5 sccm and ventilation is continued;

[0014] 2. The pre-concentrated exhaust gas enters the bionic pre-concentrator ⅡE2 again. After 3 minutes, the bionic pre-concentrator ⅠE1 and the bionic pre-concentrator ⅡE2 are heated to 150°C and maintained for 30 seconds;

[0015] 3. Use air pumps ⅠB1 and ⅡB2 to deliver the gas analyzed from bionic pre-concentrator ⅠE1 to the optical monitoring instrument 3, and start the motor 2 to rotate the bracket D at the same time;

[0016] 4. Use air pumps IB1 and IIB2 again to deliver the gas analyzed by bionic pre-concentrator IIE2 to the optical monitoring instrument 3, and start motor 2 to rotate bracket D again;

[0017] 5. Move the bionic preconcentrator IIIE3 to the initial position of the bionic preconcentrator IE1 to start the next preconcentration process;

[0018] 6. The detected gas signal is transmitted to the computer through the optical monitoring instrument 3.

[0019] The working principle and working process of the present invention are as follows:

[0020] The gas pre-concentrator for monitoring the enrichment of trace gases in the Antarctic ice layer while drilling is based on the integrated application of bionic bird lung technology and bionic pre-concentrator, and is realized through the gas dynamics principle optimized by Maury's law. Maury's law guides the optimal design of the gas flow path, ensuring the best contact between gas molecules and adsorption materials, thereby improving the enrichment efficiency and monitoring sensitivity. The device uses two sets of air pump systems to simulate the efficient gas exchange system of birds, optimize the flow and enrichment process of gas in the enricher, reduce energy consumption, and enhance the separation and enrichment capabilities of gas components.

[0021] The present invention adopts the design concept based on Maury's law to create an efficient ice layer trace gas enrichment device, the core of which is four enrichers designed according to Maury's law. These enrichers are constructed according to the principle of gradually halving the flow channel width. The specific formula is:

[0022]

[0023] Where: S i is the cross-sectional area of ​​the main branch channel, S i-1 is the cross-sectional area of ​​the branch channel, W i is the cross-sectional width of the main branch channel, W i-1 is the cross-sectional width of the branch channel, L i is the length of the main branch channel, L i-1 This design ensures that the flow rate of the ice layer trace gas and the carrier gas flowing through the enricher is uniform, thereby optimizing the adsorption capacity of the material.

[0024] In order to achieve efficient enrichment and analysis process, the working process of the device of the present invention is as follows: the in-situ Antarctic ice layer trace gas pre-concentrator while drilling of the present invention is based on the integration of bionic bird lung technology and bionic pre-concentrator, combined with the gas dynamics principle optimized by Maury's law, to achieve an efficient ice layer trace monitoring method. In the working process of the device, the in-situ Antarctic ice layer trace gas enrichment device while drilling is first integrated into the geological drill bit to guide the gas in the ice layer trace into the device for preliminary enrichment. Subsequently, through two sets of air pump systems, the continuous flow breathing mechanism of birds is simulated, and the gas circulates between the bionic pre-concentrator and the bionic bird lung chamber to achieve effective enrichment of the gas. In the secondary enrichment process of the gas after preliminary enrichment, the pipeline design optimized by Maury's law further improves the contact efficiency between the gas and the adsorption material, thereby improving the enrichment efficiency and monitoring accuracy. After the enrichment is completed, the position of the enricher is adjusted by a rotating motor, and the gas is analyzed by increasing the temperature. The enriched gas is sent to the sensor chamber for component analysis by rapid nitrogen purge to accurately monitor the gas content in the ice layer trace.

[0025] The beneficial effects of the present invention are as follows: by combining the bionic bird lung technology with the bionic pre-concentrator, and adopting the gas dynamics principle optimized by Maury's law, the present invention achieves high-sensitivity and high-precision monitoring of trace gases in the ice layer. This innovative design significantly improves the accuracy of ice layer trace gas monitoring under complex environmental conditions, while greatly reducing the false alarm rate caused by environmental variations. The in-situ Antarctic ice layer trace gas enrichment monitoring device of the present invention adopts a miniaturized design, which has the characteristics of small device size, low cost and on-site real-time monitoring, and can be effectively applied to on-site rapid ice layer trace gas monitoring. This not only promotes the efficiency and effectiveness of environmental protection, but the low-cost design also brings higher economic benefits to the environmental monitoring industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 An exploded view of the device for monitoring trace gas enrichment in Antarctic ice while drilling;

[0027] Figure 2 A cross-sectional view of the monitoring device for in-situ Antarctic ice trace gas enrichment while drilling;

[0028] Figure 3 This is the front view of the bionic bird lung chamber ⅠA1;

[0029] Figure 4 It is the left sectional view of bionic bird lung chamber IA1;

[0030] Figure 5 It is the left side view of the shell IC1;

[0031] Figure 6 is a cross-sectional view of the housing IC1;

[0032] Figure 7 is a top view of the rotating bracket D;

[0033] Figure 8 is a cross-sectional view of the rotating bracket D;

[0034] Fig. 9 A top view of the assembly of the rotating support D and the biomimetic preconcentrator group E;

[0035] Fig.10 is a top view of the bionic pre-concentrator;

[0036] Fig.11 is a cross-sectional view of a bionic pre-concentrator;

[0037] Fig.12 An enlarged view of the Maury's law flow channel in the bionic preconcentrator;

[0038] Fig.13 A dimensioned diagram of the Maury's law flow channel in the bionic preconcentrator;

[0039] Fig.14 It is a left sectional view of the bionic pre-concentrator;

[0040] Fig.15 Schematic diagram of in situ Antarctic ice trace gas enrichment while drilling;

[0041] Among them: A1. Bionic bird lung chamber Ⅰ; A2. Bionic bird lung chamber Ⅱ; B1. Air pump Ⅰ; B2. Air pump Ⅱ; C1. Shell Ⅰ; C2. Shell Ⅱ; D. Rotating bracket; E. Bionic pre-concentrator group; E1. Bionic pre-concentrator Ⅰ; E2. Bionic pre-concentrator Ⅱ; E3. Bionic pre-concentrator Ⅲ; E4. Bionic pre-concentrator Ⅳ; F. Top cover group; 1a. Trachea Ⅰ; 1b. Trachea Ⅱ; 2. Motor; 3. Optical monitoring instrument; 4. Gas storage tank; 5. Air outlet Ⅰ; 6. Air inlet Ⅰ; 7. Air inlet Ⅱ; 8. Support Frame I; 9. Shell; 10. Side hole group; 10a. Guide rail I; 10b. Guide rail II; 11. Center hole I; 12. Shell; 13. Reinforcement ribs; 14. Center hole II; 15. Hole pair; 16. Hole group; 17. Inlet pipe; 18. Bracket III; 19. Enrichment structure in accordance with Maury's law; 19a. Primary channel; 19b. Secondary channel; 19c. Third channel; 19d. Fourth channel; 20. Plate with threaded holes; 21. Exhaust pipe; 22. Antarctic ice layer; 23. Geological drill bit; 24. Bionic pre-concentrator. DETAILED DESCRIPTION

[0042] The present invention is described below with reference to the accompanying drawings.

[0043] like Figure 1 to Figure 2As shown, a monitoring device for in-situ Antarctic ice layer trace gas enrichment while drilling of the present invention is composed of a bionic bird lung chamber IA1, a trachea IA1a, an air pump IB1, a shell IC1, a motor 2, a rotating bracket D, a bionic pre-concentrator group E, a top cover group F, a shell ⅡC2, an air pump ⅡB2, a trachea Ⅱ1b, a bionic bird lung chamber ⅡA2 and an optical monitoring instrument 3, wherein the bionic bird lung chamber IA1, the air pump ⅠB1, the shell ⅠC1, the motor 2, The rotating bracket D, the housing ⅡC2, the air pump ⅡB2, the bionic bird lung chamber ⅡA2 and the optical monitoring instrument 3 are arranged in order from front to back; the air pump ⅠB1 is fixedly connected to the bracket Ⅰ8 of the bionic bird lung chamber ⅠA1, and the air pump ⅡB2 is fixedly connected to the bracket Ⅰ of the bionic bird lung chamber ⅡA2; the front end of the trachea Ⅰ1a is connected to the air inlet Ⅱ7, and the rear end of the trachea Ⅰ1a is connected to the air inlet pipe 17 of the bionic pre-concentrator ⅠE1 of the bionic pre-concentrator group E; the trachea Ⅱ1b The front end is communicated with the air inlet Ⅱ7, and the rear end of the trachea Ⅱ1b is communicated with the air inlet pipe 17 of the bionic pre-concentrator ⅡE2 of the bionic pre-concentrator group E; the middle part of the trachea Ⅰ1a is connected to the guide rail Ⅰ10a of the shell ⅠC1 and the shell ⅡC2; the middle part of the trachea Ⅱ1b is connected to the guide rail Ⅱ10b of the shell ⅠC1 and the shell ⅡC2; the output shaft of the motor 2 is interference connected with the center hole 11 of the rotating bracket D, the front end of the motor 2 is fixedly connected to the rear end of the center hole Ⅰ11 of the shell ⅠC1, and the hole pair 15 of the rotating bracket D corresponds to the rear end hole pair of the motor 2, which is used to determine the installation position reference of the motor 2; the perforated threaded plates of the bionic pre-concentrator ⅣE4, the bionic pre-concentrator ⅠE1, the bionic pre-concentrator ⅢE3 and the bionic pre-concentrator ⅡE2 in the bionic pre-concentrator group E are sequentially fixed to the upper, lower, left and right sides of the shell 12 of the rotating bracket D; the rear end of the shell ⅠC1 and the front end of the shell ⅡC2 are threadedly connected.

[0044] like Figure 3 to Figure 4 As shown, the bionic bird lung chamber IA1 and the bionic bird lung chamber IA2 have the same structure and opposite directions, and are both composed of an air tank 4 and a bracket Ⅰ8. The air tank 4 and the bracket Ⅰ8 are arranged front and back and fixedly connected; a central air inlet Ⅰ6 is provided at the front end of the air tank 4, an air inlet Ⅱ7 is provided on the right side of the air tank 4, and an air outlet Ⅰ5 is provided at the center of the rear end of the air tank 4.

[0045] like Figures 5 and 6 As shown, the shell IC1 and the shell IC2 have the same structure and are in opposite directions. The shells 9 of the shells IC1 and IC2 are both disc-shaped, and the end faces of the shells 9 are provided with a center hole Ⅰ11 and 4-6 holes of a side hole group 10.

[0046] like Figures 7 and 8As shown, the rotating bracket D is composed of an outer shell 12 and a reinforcing rib 13. The outer shell 12 is a square hollow tube, and the reinforcing rib 13 is fixedly connected to the center of the square hollow tube of the outer shell 12; the reinforcing rib 13 is provided with a center hole II 14 and two holes of a hole pair 15; 12-16 holes of the hole group 16 are provided on the left and right sides of the square hollow tube and the four sides of the rotating bracket D.

[0047] like Figures 9 to 12 The bionic preconcentrator group E is composed of bionic preconcentrators ⅠE1, ⅡE2, ⅢE3 and ⅣE4 with the same structure. Each bionic preconcentrator is composed of an air inlet pipe 17, a bracket Ⅲ18, an enrichment structure 19 in accordance with Maury's law, a threaded hole plate 20 and an air outlet pipe 21. The air inlet pipe 17, the bracket Ⅲ18 and the air outlet pipe 21 are arranged in sequence from front to back and fixedly connected; the threaded hole plate 20 is embedded in the bracket Ⅲ18, in accordance with Maury's law. The enrichment structure 23 is fixed to the center of the threaded hole plate 20; the enrichment structure 19 that conforms to Maury's law consists of a primary channel 19a, a secondary channel 19b, a tertiary channel 19c and a quaternary channel 19d, wherein each level of the flow channel follows the principle of halving the flow channel width step by step, wherein: the width of the primary channel 19a is L1, the width of the secondary channel 19b is L2, the width of the tertiary channel 19c is L3, and the width of the quaternary channel 19d is L4, that is, L1=2L2=4L3=8L4.

[0048] The monitoring method of the present invention based on the in-situ Antarctic ice layer trace gas enrichment device while drilling comprises the following steps:

[0049] 1. The gas to be tested enters the bionic bird lung chamber IA1 and is introduced into the bionic pre-concentrator IE1 through the air pump IB1. The flow rate is controlled at 5 sccm and ventilation is continued;

[0050] 2. The pre-concentrated exhaust gas enters the bionic pre-concentrator ⅡE2 again. After 3 minutes, the bionic pre-concentrator ⅠE1 and the bionic pre-concentrator ⅡE2 are heated to 150°C and maintained for 30 seconds;

[0051] 3. Use air pumps ⅠB1 and ⅡB2 to deliver the gas analyzed from bionic pre-concentrator ⅠE1 to the optical monitoring instrument 3, and start the motor 2 to rotate the bracket D at the same time;

[0052] 4. Use air pumps IB1 and IIB2 again to deliver the gas analyzed by bionic pre-concentrator IIE2 to the optical monitoring instrument 3, and start motor 2 to rotate bracket D again;

[0053] 5. Move the bionic preconcentrator IIIE3 to the initial position of the bionic preconcentrator IE1 to start the next preconcentration process;

[0054] 6. The detected gas signal is transmitted to the computer through the optical monitoring instrument 3.

Claims

1. A monitoring device for in-situ Antarctic ice layer trace gas enrichment while drilling, comprising a bionic bird lung chamber I (A1), a trachea I (1a), an air pump I (B1), a shell I (C1), a motor (2), a rotating support (D), a bionic pre-concentrator group (E), a top cover group (F), a shell II (C2), an air pump II (B2), a trachea II (1b), a bionic bird lung chamber II (A2) and an optical monitoring instrument (3), wherein the bionic bird lung chamber I (A1), the air pump I (B1), the shell I (C1), the motor (2), the rotating support The frame (D), the shell II (C2), the air pump II (B2), the bionic bird lung chamber II (A2) and the optical monitoring instrument (3) are arranged in sequence from front to back; the air pump I (B1) is fixedly connected to the bracket I (8) of the bionic bird lung chamber I (A1), and the air pump II (B2) is fixedly connected to the bracket I of the bionic bird lung chamber II (A2); the front end of the trachea I (1a) is connected to the air inlet II (7), and the rear end of the trachea I (1a) is connected to the air inlet pipe (17) of the bionic pre-concentrator I (E1) of the bionic pre-concentrator group (E); the trachea II (1b) The front end of the air pipe (1a) is connected to the air inlet port (II) (7), and the rear end of the air pipe (1b) is connected to the air inlet pipe (17) of the bionic preconcentrator (E2) of the bionic preconcentrator group (E); the middle part of the air pipe (1a) is connected to the guide rail (10a) of the shell (C1) and the shell (C2); the middle part of the air pipe (1b) is connected to the guide rail (10b) of the shell (C1) and the shell (C2); the output shaft of the motor (2) is interference-connected with the center hole (11) of the rotating bracket (D), and the front end of the motor (2) is fixedly connected to the shell (C1). 1), the hole pair (15) of the rotating bracket (D) corresponds to the hole pair at the rear end of the motor (2), and is used to determine the installation position reference of the motor (2); the threaded plates with holes of the bionic preconcentrator IV (E4), the bionic preconcentrator I (E1), the bionic preconcentrator III (E3) and the bionic preconcentrator II (E2) in the bionic preconcentrator group (E) are fixed to the upper, lower, left and right sides of the housing (12) of the rotating bracket (D) in sequence; the rear end of the housing I (C1) and the front end of the housing II (C2) are threadedly connected.

2. The monitoring device for in-situ Antarctic ice layer trace gas enrichment while drilling according to claim 1, characterized in that: The bionic bird lung chamber I (A1) and the bionic bird lung chamber II (A2) have the same structure and opposite directions, and are both composed of an air storage tank (4) and a bracket I (8). The air storage tank (4) and the bracket I (8) are arranged front and back and fixedly connected; a central air inlet I (6) is provided at the front end of the air storage tank (4), an air inlet II (7) is provided at the right side of the air storage tank (4), and an air outlet I (5) is provided at the center of the rear end of the air storage tank (4).

3. The monitoring device for in-situ Antarctic ice layer trace gas enrichment while drilling according to claim 1, characterized in that: The shell I (C1) and the shell II (C2) have the same structure and opposite directions. The shells (9) of the shells I (C1) and the shells II (C2) are both disc-shaped, and the end faces of the shells (9) are provided with a center hole I (11) and 4 to 6 holes of a side hole group (10).

4. The monitoring device for in-situ Antarctic ice layer trace gas enrichment while drilling according to claim 1, characterized in that: The rotating bracket (D) is composed of an outer shell (12) and a reinforcing rib (13). The outer shell (12) is a square hollow tube. The reinforcing rib (13) is fixed to the center of the square hollow tube of the outer shell (12). The reinforcing rib (13) is provided with a center hole II (14) and two holes of a hole pair (15). The 12-16 holes of the hole group (16) are arranged on the left and right sides of the square hollow tube and the four sides of the rotating bracket (D).

5. The monitoring device for in-situ Antarctic ice layer trace gas enrichment while drilling according to claim 1, characterized in that: The bionic preconcentrator group (E) is composed of bionic preconcentrator I (E1), bionic preconcentrator II (E2), bionic preconcentrator III (E3) and bionic preconcentrator IV (E4) with the same structure. Each bionic preconcentrator is composed of an air inlet pipe (17), a bracket III (18), an enrichment structure (19) that complies with Maury's law, a plate with threaded holes (20) and an air outlet pipe (21). The air inlet pipe (17), the bracket III (18) and the air outlet pipe (21) are arranged in sequence from front to back and fixedly connected; the plate with threaded holes (20) is embedded in the bracket III (18); the enrichment structure (23) that complies with Maury's law is fixedly connected to the center of the plate with threaded holes (20); the enrichment structure (19 ... 9) is composed of a primary channel (19a), a secondary channel (19b), a tertiary channel (19c) and a quaternary channel (19d), wherein the flow channels of each level follow the principle of halving the width of the flow channels, wherein: the width of the primary channel (19a) is L1, the width of the secondary channel (19b) is L2, the width of the tertiary channel (19c) is L3, and the width of the quaternary channel (19d) is L4, that is, L1=2L2=4L3=8L4. The top cover group (F) is composed of four top covers, and the four top covers are respectively threadedly connected to the threaded hole plates of the bionic pre-concentrator I (E1), the bionic pre-concentrator II (E2), the bionic pre-concentrator III (E3) and the bionic pre-concentrator IV (E4).

6. A monitoring method based on the in-situ Antarctic ice layer trace gas enrichment monitoring device while drilling according to claim 1, comprising the following steps: 1) The gas to be tested enters the bionic bird lung chamber Ⅰ (A1) and is introduced into the bionic preconcentrator Ⅰ (E1) through the air pump Ⅰ (B1). The flow rate is controlled at 5 sccm and ventilation is continuous; 2) The pre-concentrated exhaust gas enters the bionic pre-concentrator II (E2) again. After 3 minutes, the bionic pre-concentrator I (E1) and the bionic pre-concentrator II (E2) are heated to 150°C and maintained for 30 seconds; 3) using gas pump I (B1) and gas pump II (B2) to deliver the gas decomposed from bionic pre-concentrator I (E1) into the optical monitoring instrument (3), and at the same time starting the motor (2) to rotate the bracket (D); 4) Using air pump I (B1) and air pump II (B2) again, the gas analyzed by bionic pre-concentrator II (E2) is sent to the optical monitoring instrument (3), and the motor (2) is started again to rotate the bracket (D); 5) The bionic preconcentrator III (E3) is transferred to the initial position of the bionic preconcentrator I (E1) to start the next preconcentration process; 6) The detected gas signal is transmitted to the computer through the optical monitoring instrument (3).

Images