A gas collection device for a static flux box

Abstract

The application discloses a gas collecting device for a static flux tank, which comprises an alloy disc, a plurality of L-shaped gas pipe quick connectors are connected to the hexagonal holes arranged in an array at the edge of the alloy disc, the bottom of the L-shaped gas pipe quick connector is connected to a straight-through gas pipe connector, and the straight-through gas pipe connector is connected to a gas bag through a PVC hose; an automatic rotating assembly is arranged at the back of the alloy disc, a circular boss at the middle position of the alloy disc is provided with a timing gas injection device, a timing gas shunting device is arranged on the base below the alloy disc, the timing gas shunting device is used for shunting the gas pumped out of the static flux tank by a gas pump, and the gas is transported to the gas bag through a shunting hose, the L-shaped gas pipe quick connector and the straight-through gas pipe connector; the automatic rotating assembly is used for rotating the timing gas injection device by a preset angle; the timing gas injection device clamps the shunting hose, and after one gas bag is filled, the timing gas injection device drives the shunting hose to be connected to the next gas bag.

Description

Technical Field

[0001] This invention belongs to the field of gas sampling and analysis technology, and relates to a device for investigating and sampling greenhouse gases released from locations such as reservoirs, rivers, and drawdown zones, and particularly to a gas collection device for a static flux chamber. Background Technology

[0002] In recent years, the greenhouse effect has become increasingly severe, and the impact of greenhouse gas emissions from reservoirs and rivers on the greenhouse effect has become a focus of attention and research for many scholars. Currently, the main methods for studying the flux of greenhouse gases released from lakes and reservoirs are: first, using a portable greenhouse gas analyzer connected to a floating static flux chamber to monitor the greenhouse gas flux at the water-air interface in real time; second, using a gas bag connected to the static flux chamber to periodically collect the gas from the static flux chamber into the gas bag, and then bringing it back to the laboratory for gas composition analysis using a greenhouse gas analyzer. Both of these methods are either very labor-intensive or cannot achieve long-term, multi-period monitoring of the gas in the static flux chamber. Summary of the Invention

[0003] This invention provides a gas collection device for a static flux chamber, which enables fully automatic quantitative collection of gas from a static flux chamber under different environments at intervals, reducing the consumption of manpower and material resources in the field sampling process. It is reliable, has a precise structure and small size, and is suitable for field transport and use.

[0004] To solve the above problems, the technical solution provided by the present invention is as follows:

[0005] This invention provides a gas collection device for a static flux chamber, comprising an alloy disc (1), which is connected to a base (9) via four cylindrical tubes (8). The edge of the alloy disc (1) is arrayed with 80 regular hexagonal holes (1-1), each hole (1-1) containing an L-shaped quick-connect tubing connector (2). The bottom of the L-shaped quick-connect tubing connector (2) is connected to a straight-through tubing connector (4) before being connected to a gas bag. An automatic rotation assembly is provided on the back of the alloy disc (1). The alloy disc (1) has a circular boss (7) in the middle position with a timed gas injection device. The base (9) is equipped with a timed gas diversion device. The timed gas diversion device is used to deliver the gas in the static flow box to the gas bag through the diversion hose, L-shaped gas quick connector (2), and straight gas connector (4) according to the set time. The automatic rotation component is used to rotate the timed gas injection device by a preset angle. The timed gas injection device clamps the diversion hose and drives the diversion hose to connect with the next gas bag after one docking gas bag is filled with gas.

[0006] In a preferred embodiment of the present invention, the timed gas diversion device includes a three-way gas solenoid valve (10), a gas pump (11), an infinite-cycle timer switch (12), and a battery (13); the three-way gas solenoid valve (10) is divided into an inlet (10-1), a normal outlet (10-2), and an intermittent outlet (10-3); when the three-way gas solenoid valve (10) is energized and intermittent gas is discharged, the intermittent outlet (10-3) opens, and when the power is off, the normal outlet (10-2) opens; wherein the inlet (10-1)... The air pump (11) is connected to the air outlet of the air pump (11) via a PVC hose. The normal air outlet (10-2) is connected to the static flow box, and the intermittent air outlet (10-3) is connected to the L-shaped quick-connect air tube adapter needle (17) of the timed air injection device. The air pump (11) is powered by a 24V rated voltage battery (13). The infinite cycle timer switch (12) controls the battery (13) to supply power to the three-way gas solenoid valve (10) intermittently at set times, thereby changing the opening and closing status of the normal air outlet (10-2) and the intermittent air outlet (10-3).

[0007] The three-way gas solenoid valve (10) is used to change the gas passage at regular intervals. When the gas injection device is working, the intermittent gas outlet (10-3) is opened and the normal gas outlet (10-2) is closed. The gas in the static flow box enters the timed gas injection device under the action of the gas pump (11). When the gas injection device is not working, the normal gas outlet (10-2) is opened and the intermittent gas outlet (10-3) is closed. The gas in the static flow box returns to the static flow box after passing through the gas pump (11) and the three-way gas solenoid valve (10), so that the gas pressure in the static flow box is stable.

[0008] In a preferred embodiment of the present invention, the timed gas injection device includes a push rod power supply (14), an electric push rod controller (15), an electric push rod (16), an L-shaped quick-connect endotracheal tube adapter needle (17), and an injection needle (6). The electric push rod (16) is electrically connected to the push rod power supply (14) and the electric push rod controller (15). The electric push rod (16) is connected to the L-shaped quick-connect endotracheal tube adapter needle (17). The L-shaped quick-connect endotracheal tube adapter needle (17) is sleeved on the end of the diversion hose connected to the intermittent gas outlet (10-3).

[0009] In a preferred embodiment of the present invention, the electric push rod controller (15) can divide the movement of the electric push rod (16) into four processes: A, B, C, and D by programming. Process A represents the extension of the electric push rod, process B represents the dwell time after extension, process C represents the retraction of the electric push rod, and process D represents the dwell time after retraction.

[0010] In a preferred embodiment of the present invention, the automatic rotating assembly includes a stepper motor (5), a motor controller (18), and a motor driver (19). The stepper motor (5) is fixed to the back of the alloy disc (1). The motor controller (18) and the motor driver (19) are fixed to the base (9) and are both electrically connected to the stepper motor (5). The stepper motor (5) is connected to the circular boss (7) through the first circular hole (1-2) at the center of the alloy disc (1) so that the timing air injection device rotates together with the circular boss (7).

[0011] In a preferred embodiment of the present invention, a gas collection device for a static flux box further includes a housing (20), which is fitted around an alloy disc (1) and a base (9); the housing (20) is a hollow cylinder with a bottom radius of 240 mm, a height of 300 mm, and a thickness of 5 mm; the top of the housing (20) has a fourth circular hole (20-1) for fixing a quick-rotating gas adapter connected thereto; the housing (20) is connected to the base (9) by a snap fastener, wherein a 1 mm silicone pad is placed at the junction of the housing (20) and the base (9) to achieve a sealing and waterproof effect.

[0012] Compared with the prior art, the present invention provides a gas collection device for a static flux chamber, which has the following advantages: (1) The present invention can realize multi-time period, intermittent, long-term, fully automatic collection of gas from the static flux chamber and bring it back to the laboratory for analysis. Compared with the traditional method, it reduces the consumption of manpower and material resources in the field sampling process. (2) The present invention can be used in combination with different types of static flux chambers in different experimental sampling scenarios, such as lakes, reservoirs, drawdown zones, etc., and has a wide range of applications. (3) The present invention has a fine structure, stable operation, small overall size, convenient and quick replacement of sampling gas bags, and low cost, making it suitable for field sampling. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of a gas collection device for a static flux box provided in an embodiment of this application.

[0015] Figure 2 for Figure 1 An enlarged schematic diagram of the upper functional structure of the alloy disk.

[0016] Figure 3 This is a schematic diagram of the structure of an alloy disc provided in an embodiment of this application.

[0017] Figure 4 This is a schematic diagram of a circular boss provided in an embodiment of this application.

[0018] Figure 5 This is a schematic diagram of the structure of a shell provided in an embodiment of this application. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The terms "upper," "lower," "front," "rear," "left," and "right," etc., used when describing the installation position or direction of the structure or components in this embodiment are based on the orientation shown in the accompanying drawings. They are merely for convenience of description, used to distinguish the relative positions of various components or directions, and do not represent the orientation of the device or component in this embodiment during use.

[0020] like Figure 1 and Figure 2 As shown, this embodiment of the invention provides a gas collection device for a static flux chamber, including an alloy disc 1. The alloy disc 1 is connected to a base 9 via four cylindrical tubes 8. The edge of the alloy disc 1 is arrayed with 80 regular hexagonal holes 1-1. An L-shaped quick-connect tubing connector 2 is connected to each hexagonal hole 1-1. The bottom of the L-shaped quick-connect tubing connector 2 is connected to a straight-through tubing connector 4, which in turn connects to a gas bag. An automatic rotating assembly is located on the back of the alloy disc 1. A circular protrusion 7 in the middle of the alloy disc 1 is equipped with a timed gas injection device. The base 9 is equipped with a timed gas diversion device. The timed gas diversion device is used to deliver gas from the static flux chamber to the gas bag via a diversion hose, the L-shaped quick-connect tubing connector 2, and the straight-through tubing connector 4 at set intervals. The automatic rotating assembly rotates the timed gas injection device by a preset angle. The timed gas injection device clamps the diversion hose, and after one gas bag is filled with gas, it drives the diversion hose to connect with the next gas bag. The L-type quick-connector 2 is preferably an L-type pneumatic internal thread bend quick-connector for air hoses.

[0021] like Figure 3As shown, the alloy disc 1 is a disc with a radius of 220mm and a thickness of 10mm. Eighty regular hexagonal holes 1-1 are evenly distributed along the circumference at a distance of 200mm from the center. The hole diameter is the same as the hexagonal portion of the L-shaped quick-connect tubing 2, and the holes are oriented in the same direction. At the center of the alloy disc 1 is a first circular hole 1-2 with a diameter of 10mm, which serves as the through hole for the stepper motor 5. A screw is then passed through the stepper motor's built-in screw hole to directly fix the stepper motor 5 to the back of the alloy disc 1, allowing the stepper motor 5's head to pass through the first circular hole 1-2 and connect to the circular boss 7.

[0022] Specifically, each hexagonal hole 1-1 on the alloy disc 1 is fitted with an L-shaped quick-connect endotracheal connector 2. The two ends of this L-shaped quick-connect endotracheal connector 2 are a snap-fit ​​end for inserting into the endotracheal tube and an internal thread end, respectively. During installation, ensure that the snap-fit ​​end of each connector is aligned with the center of the alloy disc 1. The internal thread end of the L-shaped quick-connect endotracheal connector is connected to the external thread end of the straight-through endotracheal connector (the two ends of the straight-through endotracheal connector are an external thread end and a snap-fit ​​end for inserting into the endotracheal tube, respectively). After the L-shaped quick-connect endotracheal connector is connected to the straight-through endotracheal connector, a PVC hose is used to connect the air bag and the straight-through endotracheal connector.

[0023] Next, insert a silicone plug of appropriate size into the PVC pipe 3 to achieve a seal. Four second circular holes 1-3 are evenly distributed along the circumference of the alloy disc 1 at a distance of 150mm from the center. The tops of the four cylindrical tubes 8 are fixed in the four second circular holes 1-3. Figure 4 As shown, there is a third circular hole 7-1 with a diameter of 10mm at the center of the circular boss 7. The head of the stepper motor 5 passes through the first circular hole 1-2 and connects to the third circular hole 7-1.

[0024] The timed gas diversion device includes a three-way gas solenoid valve 10, a gas pump 11, an infinite cycle timer switch 12, and a battery 13. The three-way gas solenoid valve 10 has an inlet 10-1, a normal outlet 10-2, and an intermittent outlet 10-3. When the three-way gas solenoid valve 10 is energized and gas is intermittently discharged, the intermittent outlet 10-3 opens; when the power is off, the normal outlet 10-2 opens. The inlet 10-1 is connected to the outlet of the gas pump 11 via a PVC hose, the normal outlet 10-2 is connected to the static flow box, and the intermittent outlet 10-3 is connected to the L-shaped quick-connect gas tube adapter needle 17 of the timed gas injection device via a diversion hose. The air pump 11 is powered by a 24V rated voltage battery 13. The air inlet of the air pump 11 is connected to the static flow box, and the air outlet of the air pump 11 is connected to the air inlet 10-1 of the two-position three-way gas solenoid valve 10, providing power for the movement of gas in the static flow box within the device of this invention. The infinite cycle timer switch 12 intermittently controls the power supply from the battery 13 to the three-way gas solenoid valve 10 at set intervals, thereby changing the opening and closing status of the constant outlet 10-2 and the intermittent outlet 10-3.

[0025] The three-way gas solenoid valve 10 is used to change the gas passage at regular intervals. When the gas injection device is working, the intermittent gas outlet 10-3 is open and the normal gas outlet 10-2 is closed. The gas in the static flow box enters the timed gas injection device under the action of the gas pump 11. When the gas injection device is not working, the normal gas outlet 10-2 is open and the intermittent gas outlet 10-3 is closed. After passing through the gas pump 11 and the three-way gas solenoid valve 10, the gas returns to the static flow box, so that the gas pressure in the static flow box is stable.

[0026] like Figure 1 and Figure 2 As shown, the timed inflation device includes a push rod power supply 14, an electric push rod controller 15, an electric push rod 16, an L-shaped quick-connect tubing adapter needle 17, and an inflation needle 6. The electric push rod 16 is electrically connected to the push rod power supply 14 and the electric push rod controller 15. The electric push rod 16 is connected to the L-shaped quick-connect tubing adapter needle 17, which is fitted onto the end of the diversion tubing connected to the intermittent air outlet 10-3. The reciprocating motion of the electric push rod 16 drives the inflation needle 6 to insert into the rubber plug on each L-shaped quick-connect tubing connector, thereby inflating each air bag. The electric push rod controller 15 can be programmed to divide the movement of the electric push rod 16 into four processes: A, B, C, and D. Process A represents the extension of the electric push rod, process B represents the dwell time after extension, process C represents the retraction of the electric push rod, and process D represents the dwell time after retraction.

[0027] In this embodiment, the L-shaped quick-connect endotracheal tube adapter 17 is an L-shaped adapter. One end is a snap-lock endotracheal tube quick-connect connector, and the other end is the connection end of the injection needle 6. The injection needle 6 is fixed to the L-shaped quick-connect endotracheal tube adapter 17. The front end of the electric push rod 16 is fixed to the L-shaped quick-connect endotracheal tube adapter 17, and then the injection needle 6 is fixed to the L-shaped quick-connect endotracheal tube adapter 17. The extension and retraction stroke of the electric push rod 16 drives the L-shaped quick-connect endotracheal tube adapter 17 to reciprocate. The push rod power supply 14, the electric push rod controller 15, and the electric push rod 16 are all fixed on the circular boss 7. When the stepper motor 5 drives the circular boss 7 to rotate, the above components rotate with the circular boss 7, thereby injecting air into each air bag on the alloy disc 1.

[0028] The automatic rotation assembly includes a stepper motor 5, a motor controller 18, and a motor driver 19. The stepper motor 5 is fixed to the back of the alloy disc 1 and is powered by a battery 13. The motor controller 18 and the motor driver 19 are fixed to the base 9 and are both electrically connected to the stepper motor 5. The stepper motor 5 is connected to the circular boss 7 through a small hole 1-1 at the center of the alloy disc 1, so that the timed air injection device rotates together with the circular boss 7.

[0029] The stepper motor 5, motor controller 18, and motor driver 19 work as a whole to drive the circular boss 7 to move and stop according to a set time. The motor controller 18 controls the rotation direction, angle, speed, and other parameters of the stepper motor 5, while the motor driver 19 converts the commands from the controller into controllable electrical signals for the stepper motor 5. The motor driver 19 receives pulse signals; for each pulse received, it sends a pulse to the stepper motor 5, causing it to rotate through a fixed angle. The motor controller 18, in conjunction with the motor driver 19, controls the rotation state of the stepper motor 5, thus enabling the circular boss 7 to rotate at the required set angle and remain stationary for the corresponding time. In this embodiment, the diameter of the circular boss 7 is 100mm. After the stepper motor 5 head passes through the alloy disc 1, it connects to the circular boss 7 with a central hole, causing the stepper motor 5 head to rotate at a set angle and drive the circular boss 7 to rotate by a certain angle.

[0030] like Figure 5 As shown, a gas collection device for a static flux chamber also includes a housing 20, which is fitted around the alloy disc 1 and the base 9. The housing 20 is a hollow cylinder without a bottom surface and a quick-rotating gas adapter. The housing 20 is connected to the base 9 by snap-fit, providing a sealed and waterproof effect. In this embodiment, the housing is a hollow cylinder with a bottom radius of 240mm, a height of 300mm, and a thickness of 5mm. The top of the housing 20 has a fourth circular hole 20-1 for fixing the quick-rotating gas adapter connected thereto.

[0031] The entire process of collecting gas from a static flux box using the device of this invention is as follows: After transporting the gas collection device to the sampling point, the static flux box is set up. The outlet of the static flux box and the inlet of the air pump 11 are connected by a PVC pipe. The inlet of the static flux box and the normal outlet 10-2 of the three-way solenoid valve 10 are connected in sequence. After connecting the gas bag to the straight-through end of the straight-through air pipe connector on the alloy disc 1, the gas bag valve is opened. Then, the 24V battery 13 and the push rod power supply 14 are turned on. The air pump 11 continues to work, drawing gas from the static flux box and feeding it into the three-way gas solenoid valve 10. The infinite cycle timer switch 12 is activated. The intermittent control battery 13 supplies power to the three-way gas solenoid valve 10, changing the gas passage of the three-way solenoid valve 10. When the three-way gas solenoid valve 10 is not energized, the normal outlet 10-2 is open and the intermittent outlet 10-3 is closed. The gas drawn from the static flow box by the gas pump 11 returns to the static flow box after passing through the three-way solenoid valve 10, keeping the gas in the static flow box stable. At this time, the electric push rod 16 in the timed gas injection device starts to execute the extension command A under the control of the electric push rod controller 15, driving the gas injection needle 6 to pierce the silicone plug at the end of the PVC pipe 3. After the electric push rod 16 completes the command A, the infinite cycle timer switch 12 controls the two-position three-way gas solenoid valve 10 to be energized. At this time, the normal outlet 10-2 is closed and the intermittent outlet 10-3 is opened. After the gas passes through the three-way gas solenoid valve 10, it enters the diversion hose connected to the intermittent outlet 10-3 and enters the gas injection needle 6 to start injecting gas into the first gas bag. The gas injection time is the same as the pause time B after the electric push rod controller 15 controls the extension of the electric push rod 16. After the first gas bag is inflated and the first sampling is completed, the electric push rod controller 15 sends command C to the electric push rod 16, which retracts the inflating needle 6. Simultaneously, the infinite cycle timer switch 12 controls the battery 13 to stop supplying power to the three-way gas solenoid valve 10, opening the normal outlet 10-2 and closing the intermittent outlet 10-3. The gas pumped by the air pump 11 returns to the static flow box, forming a path to maintain stable gas pressure in the static flow box. At this time, the circular boss 7 with a central hole begins to move under the drive of the stepper motor 5, accurately moving the inflating needle 6 to the rubber stopper of the next PVC tube 3 connected to the gas bag. After a period of time, the gas concentration in the static flow box changes, the retraction dwell time D of the electric push rod 16 ends, and the electric push rod 16 begins to drive the inflating needle 6 to re-extend command A, repeating the above steps to begin inflating the second gas bag and performing the second sampling in the second time period. This process is repeated until sampling is complete. After sampling is completed, retrieve the device, open the outer casing, close the gas bag valve, remove the gas bag and bring it back to the laboratory. Then, use a greenhouse gas analyzer to analyze the gas in the gas bag.

[0032] Details of the various components preferably purchased according to this invention are as follows:

[0033] L-type quick-connect tubing coupling 2 was purchased from Wenzhou Laize Pneumatic Technology Co., Ltd., model PLF6-M5. Rubber plugs were purchased from Suzhou Shunhang Rubber & Plastic Products Co., Ltd., model TS-4.2 (short version). Straight-through quick-connect tubing couplings were purchased from Airtac China Co., Ltd., model PC6M5. Three-way gas solenoid valve 10 was purchased from Shanghai Xingchen Pneumatic Co., Ltd., model VT307-5G1-02 DC24V. Air pump 11 was purchased from Dongguan Zhirong Vacuum Equipment Co., Ltd., model ZR370-02PM 24V. Infinite cycle timer switch 12 was purchased from Shangde United Electric Group, model 24V infinite cycle switch.

[0034] The power supply for the actuator 14, the electric actuator controller 15, and the electric actuator 16 were all purchased from Xiamen Shaoteng Technology Co., Ltd., with models of 12V 3000mAh lithium battery, 12V-70N telescopic timer controller, and 30mm travel with double ears, respectively. The L-shaped quick-connect air hose adapter needle 17 was purchased from Jiajing Hardware Store in Jiaxing Zhong'an Metal Hardware Market, with model number 90-degree quick-connect straight-screw type 6mm outer diameter air hose connector. The air injection needle 6 was purchased from Shanghai Kangdelai Enterprise Development Group Co., Ltd., with model number 0.7mm*32mm.

[0035] Stepper motor 5, motor controller 18, and motor driver 19 were all purchased from Shenzhen Yueyu Electronics Technology Co., Ltd., with models 57 motor 3NM, YMS8-D, and DM556 driver respectively. The quick-rotation pneumatic adapter was purchased from Shenzhen Baoan District Xinqiao Chaohui Automation Components Store, model 6mm for right-angle elbow connectors. All PVC hoses used in the entire device were purchased from Zhejiang Zhongcai Pipeline Technology Co., Ltd., with an outer diameter of 6mm and an inner diameter of 4mm. The central perforated disc 17, the hollow cylinder without a bottom surface 18, the four cylindrical tubes 8 with internal threaded holes at both ends, and the base 9 are all made of alloy material, which reduces the overall weight of the device and facilitates field transport and use.

[0036] Although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A gas collection device for a static flux chamber, characterized in that, The device includes an alloy disc (1), which is connected to a base (9) via four cylindrical tubes (8). The edge of the alloy disc (1) is arrayed with 80 regular hexagonal holes (1-1). Each hexagonal hole (1-1) is connected to an L-shaped quick-connect tracheal connector (2). The bottom of the L-shaped quick-connect tracheal connector (2) is connected to a straight-through tracheal connector (4) before connecting to an air bag. An automatic rotating assembly is located on the back of the alloy disc (1). The center of the alloy disc (1) is... The circular boss (7) is equipped with a timed gas injection device, and the base (9) is equipped with a timed gas diversion device. The timed gas diversion device is used to deliver the gas in the static flow box to the gas bag through the diversion hose, L-shaped gas pipe quick connector (2), and straight-through gas pipe connector (4) according to the set time. The automatic rotation component is used to rotate the timed gas injection device by a preset angle. The timed gas injection device clamps the diversion hose, and after one docking gas bag is filled with gas, it drives the diversion hose to dock with the next gas bag.

2. The gas collection device for a static flux chamber according to claim 1, characterized in that, The timed gas diversion device includes a three-way gas solenoid valve (10), a gas pump (11), an infinite cycle timer switch (12), and a battery (13); the three-way gas solenoid valve (10) is divided into an inlet (10-1), a normal outlet (10-2), and an intermittent outlet (10-3); when the three-way gas solenoid valve (10) is energized and intermittent gas is discharged, the intermittent outlet (10-3) opens, and when the power is off, the normal outlet (10-2) opens; wherein the inlet (10-1) is connected to a PVC... The material hose is connected to the air outlet of the air pump (11), the normal air outlet (10-2) is connected to the static flow box, and the intermittent air outlet (10-3) is connected to the L-shaped quick-connect air tube adapter needle (17) of the timed air injection device; the air pump (11) is powered by a 24V rated voltage battery (13); the infinite cycle timer switch (12) controls the battery (13) to supply power to the three-way gas solenoid valve (10) intermittently through the set time, thereby changing the opening and closing status of the normal air outlet (10-2) and the intermittent air outlet (10-3); The three-way gas solenoid valve (10) is used to change the gas passage at regular intervals. When the gas injection device is working, the intermittent gas outlet (10-3) is opened and the normal gas outlet (10-2) is closed. The gas in the static flow box enters the timed gas injection device under the action of the gas pump (11). When the gas injection device is not working, the normal gas outlet (10-2) is opened and the intermittent gas outlet (10-3) is closed. The gas in the static flow box returns to the static flow box after passing through the gas pump (11) and the three-way gas solenoid valve (10), so that the gas pressure in the static flow box is stable.

3. A gas collection device for a static flux chamber according to claim 2, characterized in that, The timed gas injection device includes a push rod power supply (14), an electric push rod controller (15), an electric push rod (16), an L-shaped quick-connect endotracheal tube adapter needle (17), and an injection needle (6). The electric push rod (16) is electrically connected to the push rod power supply (14) and the electric push rod controller (15). The electric push rod (16) is connected to the L-shaped quick-connect endotracheal tube adapter needle (17). The L-shaped quick-connect endotracheal tube adapter needle (17) is sleeved on the end of the diversion hose connected to the intermittent gas outlet (10-3).

4. A gas collection device for a static flux chamber according to claim 3, characterized in that, The electric push rod controller (15) divides the movement of the electric push rod (16) into four processes: A, B, C, and D by programming. Process A represents the extension of the electric push rod, process B represents the dwell time after extension, process C represents the retraction of the electric push rod, and process D represents the dwell time after retraction.

5. A gas collection device for a static flux chamber according to claim 3, characterized in that, The automatic rotation assembly includes a stepper motor (5), a motor controller (18), and a motor driver (19). The stepper motor (5) is fixed to the back of the alloy disc (1). The motor controller (18) and the motor driver (19) are fixed to the base (9) and are electrically connected to the stepper motor (5). The stepper motor (5) is connected to the circular boss (7) through the first circular hole (1-2) at the center of the alloy disc (1) so that the timing gas injection device rotates together with the circular boss (7).

6. A gas collection device for a static flux chamber according to claim 1, characterized in that, It also includes a housing (20), which is fitted around the alloy disc (1) and the base (9); the housing (20) is a hollow cylinder with a bottom radius of 240 mm, a height of 300 mm, and a thickness of 5 mm; the top of the housing (20) has a fourth circular hole (20-1) for fixing the quick-rotating air adapter connected thereto; the housing (20) is connected to the base (9) by a buckle, wherein a 1 mm silicone pad is placed at the joint between the housing (20) and the base (9) to achieve a sealing and waterproof effect.

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