A sampling device and sampling method for analyzing the concentration of tert-hydrogen.

Abstract

This invention provides a sampling device and method for analyzing the concentration of hydroxyl and parahydrogen ions (HHE), belonging to the field of new energy technology. The sampling device includes a tank, an inflation valve, and an intermittent exhaust assembly. The inflation valve is connected to one end of the tank, and the intermittent exhaust assembly is mounted on the tank, allowing gas inside the tank to be intermittently discharged from both ends. The intermittent exhaust assembly includes exhaust heads, exhaust valve cores, and exhaust control components located at both ends of the tank. The intermittent exhaust assembly in this sampling device for HHE concentration analysis allows air to be discharged from both ends of the tank through intermittent exhaust, facilitating air removal from the ends and edges of the tank and improving air discharge efficiency. The intermittent exhaust method also promotes turbulence within the tank, facilitating the removal of impurities from the inner wall of the tank and carrying these impurities out of the tank.

Description

Technical Field

[0001] This invention relates to the field of new energy technology, and in particular to a sampling device and sampling method for analyzing the concentration of tert-hydrogen. Background Technology

[0002] Hydrogen energy, as a clean and efficient new energy source, is characterized by its flexibility, high efficiency, cleanliness, low carbon footprint, and wide range of applications. Maintaining the concentration of hydrogen during its use is crucial, as impure hydrogen can easily lead to accidents and pose safety hazards.

[0003] In the existing technology, during the process of filling the sampling container with hydrogen, excessive hydrogen is repeatedly added to the container over a long period of time to expel as much of the original air in the container as possible, so as to reduce the impact on the sample. However, since the container is generally long and deep, it is difficult for all the gas in the container to flow out. Moreover, long-term use of the container can easily cause impurities to form on the inner wall of the container, which can affect the sample.

[0004] The information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this invention, and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] Therefore, it is necessary to provide a sampling device and sampling method for the analysis of positive and negative hydrogen concentration, in order to solve the problem that existing hydrogen sampling devices cannot completely purge the air from the sampling container.

[0006] The above objectives are achieved through the following technical solutions:

[0007] A sampling device for analyzing the concentration of tert-hydrogen ions includes a tank, an inflation valve, and an intermittent venting assembly.

[0008] The inflation valve is connected to one end of the tank body, and the intermittent exhaust assembly is installed on the tank body, which enables the gas inside the tank body to be intermittently discharged from both ends of the tank body;

[0009] The intermittent exhaust assembly includes an exhaust head, an exhaust valve core, and an exhaust control component disposed at both ends of the tank body;

[0010] The exhaust head is connected to the inside of the tank.

[0011] The exhaust valve core is slidably disposed inside the exhaust head. The exhaust valve core is configured to enable the tank to communicate with the exhaust head in a first position and to close the tank to the exhaust head in a second position.

[0012] The exhaust control component is disposed on the tank body and connected to the exhaust valve core. The exhaust control component can drive the exhaust valve core to switch between the first position and the second position.

[0013] Preferably, the exhaust valve core has an exhaust flow channel, a branch flow channel, and an intake flow channel inside;

[0014] Wherein, one end of the exhaust flow channel is connected to the end of the exhaust valve core away from the tank body, the other end of the exhaust flow channel is located inside the exhaust valve core, and the outlet end of the exhaust flow channel has a constricted structure.

[0015] One end of the branch flow channel is connected to the middle of the exhaust flow channel, and the other end of the branch flow channel is connected to the side wall of the exhaust valve core. When the exhaust valve core is in the first position, the other end of the branch flow channel can be connected to the exhaust control component.

[0016] One end of the air intake channel is connected to the middle of the exhaust channel, and the other end of the air intake channel is connected to the end of the exhaust valve core near the tank body;

[0017] A baffle is fixedly connected to one end of the exhaust valve core near the tank body. The baffle is used to open or close the connection between the tank body and the exhaust head.

[0018] Preferably, the exhaust control component includes a limiting box, a magnet, and two sliders;

[0019] The limiting box is disposed on the top of the tank body, and the extending direction of the limiting box is the same as the extending direction of the tank body;

[0020] The magnet is fixedly installed inside the limiting box;

[0021] Both ends of the limiting box are provided with a pressure chamber and a sliding chamber, which are connected to each other. The pressure chamber is located between the magnet and the sliding chamber. The pressure chamber is connected to the side wall of the exhaust valve core through a branch pipe. When the exhaust valve core is in the first position, the pressure chamber can be connected to the branch flow channel. The limiting box has a pressure relief structure.

[0022] The two sliders are respectively slidably disposed in the two sliding chambers. The sliders are magnetic, and the end of the slider closest to the magnet has the opposite polarity to the magnet. The sliders are fixedly connected to the exhaust valve core through a connecting rod.

[0023] Preferably, the magnet is an electromagnet, and the limiting box is provided with a switch that can control the electromagnet to be energized.

[0024] Preferably, a limiting piece is provided between the pressure chamber and the sliding chamber, the limiting piece is fixedly connected to the limiting box, and the limiting piece has a first through hole in the middle, the first through hole being used to connect the pressure chamber and the sliding chamber.

[0025] Preferably, the limiting box has a second through hole at both ends, and the second through hole communicates with the sliding chamber.

[0026] Preferably, the top of the exhaust head and the bottom of the limiting box having the sliding chamber portion are both provided with sliding grooves, and the two ends of the connecting rod are respectively fixedly connected to the bottom of the slider and the top of the exhaust valve core. The sliding grooves are used for the connecting rod to make way during the movement process; the pressure relief structure includes the sliding grooves on the limiting box.

[0027] Preferably, the baffle is fixedly connected to the exhaust valve core via a connecting post, and a retaining ring is fixedly provided at the joint between the tank body and the exhaust head. The diameter of the connecting post is smaller than the inner diameter of the retaining ring, and the diameter of the baffle is larger than the inner diameter of the retaining ring.

[0028] Preferably, the exhaust head is located at the center of the end of the tank.

[0029] A sampling method for analyzing the concentration of tert-hydrogen ions, the method being applied to a sampling device for analyzing the concentration of tert-hydrogen ions, the method comprising the following steps:

[0030] Hydrogen gas is introduced into the tank through the filling valve;

[0031] When the pressure inside the tank increases, the exhaust control component drives the exhaust valve core to switch between the first position and the second position, and the two ends of the tank intermittently discharge the original air inside the tank and the impurities on the inner wall of the tank.

[0032] After the tank is emptied of its original air, the inflation valve is closed, and the exhaust control component or manual control locks the exhaust valve core in the second position.

[0033] The beneficial effects of this invention are:

[0034] In the sampling device for the analysis of hydrogen concentration of the present invention, the intermittent venting component allows air to be discharged from both ends of the tank through intermittent venting, making it easier for air to be discharged from the ends and sides of the tank and improving the air discharge efficiency. Compared with the single-sided venting scheme in the prior art, the fact that air can be discharged from both ends of the tank in the present invention can balance the reaction force generated by the high-pressure gas discharge of the sampling device. The intermittent venting method is conducive to generating turbulence inside the tank, which is beneficial to cleaning impurities on the inner wall of the tank and discharging the impurities out of the tank. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of a sampling device for analyzing the concentration of tert-hydrogen according to an embodiment of the present invention.

[0036] Figure 2 This is a front view of a sampling device for analyzing the concentration of tert-hydrogen according to an embodiment of the present invention;

[0037] Figure 3 This is a left view of a sampling device for analyzing the concentration of tert-hydrogen according to an embodiment of the present invention;

[0038] Figure 4 For the present invention Figure 3 Sectional view at point AA;

[0039] Figure 5 For the present invention Figure 4 A schematic diagram of the structure where the exhaust valve core is in the second position;

[0040] Figure 6 For the present invention Figure 4 Enlarged view of a section at point B in the middle;

[0041] Figure 7 For the present invention Figure 5 Enlarged view of a section at point C;

[0042] Figure 8 This is a flowchart of a sampling method for analyzing the concentration of tert-hydrogen according to another embodiment of the present invention.

[0043] in:

[0044] 100. Tank body; 101. Exhaust head; 200. Inflation valve; 300. Exhaust control component; 301. Switch; 302. Magnet; 303. Slider; 304. Exhaust valve core; 3041. Exhaust channel; 3042. Branch channel; 3043. Inlet channel; 3044. Baffle; 305. Branch pipe; 306. Connecting rod; 307. Limit box; 308. Slide groove. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0046] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] One embodiment of the present invention provides a sampling device for the analysis of the concentration of tert-hydrogen, hereinafter referred to as the sampling device, with reference to... Figures 1 to 3 The sampling device includes a tank 100, an inflation valve 200, and an intermittent exhaust assembly. The inflation valve 200 is connected to one end of the tank 100. The intermittent exhaust assembly is installed on the tank 100 and allows gas inside the tank 100 to be intermittently discharged from both ends of the tank 100. The intermittent exhaust assembly includes an exhaust head 101, an exhaust valve core 304, and an exhaust control component 300 installed at both ends of the tank 100.

[0049] Specifically, in this embodiment, the tank 100 has a certain height or depth, and the inflation valve 200 is a one-way valve. The inflation valve 200 is existing technology and will not be described in detail here. Hydrogen can be filled into the tank 100 by connecting the inflation pipe to the inflation valve 200. Once the tank 100 is full of hydrogen, the inflation pipe can be disconnected.

[0050] During the inflation process, the intermittent venting component allows air to be discharged from both ends of the tank 100 through intermittent venting, making it easier for air to escape from the ends and sides of the tank 100, thus improving the air discharge efficiency. This is equivalent to halving the depth of the tank 100. Compared to the single-sided venting scheme in the prior art, the fact that the tank 100 can be vented from both ends in this embodiment can balance the reaction force generated by the high-pressure gas discharge from the sampling device. The intermittent venting method is beneficial for generating turbulence inside the tank 100, which helps to clean impurities on the inner wall of the tank 100 and removes these impurities from the tank 100. It should be noted that the sampling device of this embodiment can be applied not only to hydrogen sampling but also to the sampling of gases such as oxygen, helium, and carbon dioxide.

[0051] In the intermittent exhaust assembly, the exhaust head 101 is connected to the interior of the tank 100, and the end of the exhaust head 101 away from the tank 100 has a vent hole; the exhaust valve core 304 is slidably disposed inside the exhaust head 101, and the exhaust valve core 304 is configured to enable the tank 100 to conduct with the exhaust head 101 in a first position, and to enable the tank 100 to close with the exhaust head 101 in a second position; the exhaust control component 300 is disposed on the tank 100 and connected to the exhaust valve core 304, and the exhaust control component 300 can drive the exhaust valve core 304 to switch between the first position and the second position.

[0052] Specifically, refer to Figure 4 and Figure 5 During the process of filling hydrogen into the tank 100, the exhaust control component 300 drives the exhaust valve core 304 to slide back and forth in the exhaust head 101 under the action of air pressure and external force. When the exhaust valve core 304 is close to the tank 100, i.e., the first position, the air in the tank 100 can be discharged from the exhaust head 101. When the exhaust valve core 304 is far away from the tank 100, i.e., the second position, the exhaust valve core 304 blocks the exhaust head 101, preventing the air in the tank 100 from being discharged from the exhaust head 101. This cycle repeats to discharge the air in the tank 100.

[0053] In some embodiments, refer to Figure 6 The exhaust valve core 304 has an exhaust flow channel 3041, a branch flow channel 3042, and an intake flow channel 3043 inside. The exhaust flow channel 3041 can be arranged along the axis of the exhaust valve core 304, and the branch flow channel 3042 and the intake flow channel 3043 can be arranged at an angle to the axis of the exhaust valve core 304. The branch flow channel 3042 and the intake flow channel 3043 are connected in the middle of the exhaust flow channel 3041.

[0054] Specifically, one end of the exhaust channel 3041 is connected to the end of the exhaust valve core 304 away from the tank 100, and the other end of the exhaust channel 3041 is located inside the exhaust valve core 304. The outlet end of the exhaust channel 3041 has a constricted structure. Air in the tank 100 is discharged through the exhaust channel 3041. The constricted structure can increase the pressure of gas passing through the outlet end of the exhaust channel 3041 and prevent excessive gas from being discharged through the exhaust channel 3041 during the exhaust process.

[0055] One end of the branch flow channel 3042 is connected to the middle of the exhaust flow channel 3041, and the other end of the branch flow channel 3042 is connected to the side wall of the exhaust valve core 304. When the exhaust valve core 304 is in the first position, the other end of the branch flow channel 3042 can be connected to the exhaust control component 300. One end of the intake flow channel 3043 is connected to the middle of the exhaust flow channel 3041, and the other end of the intake flow channel 3043 is connected to the end of the exhaust valve core 304 near the tank body 100.

[0056] A baffle 3044 is fixedly connected to one end of the exhaust valve core 304 near the tank body 100. The baffle 3044 is used to open or close the connection between the tank body 100 and the exhaust head 101.

[0057] In some embodiments, refer to Figure 3 and Figure 4 The exhaust control component 300 includes a limiting box 307, a magnet 302, and two sliders 303. The limiting box 307 is located at the top of the tank body 100, extending in the same direction as the tank body 100, and has a square or circular cross-section. The magnet 302 is fixedly disposed inside the limiting box 307, with its outer contour closely fitting against the inner wall of the limiting box 307.

[0058] The limiting box 307 has a pressure chamber and a sliding chamber at both ends, which are connected. The pressure chamber is located between the magnet 302 and the sliding chamber. The pressure chamber is connected to the side wall of the exhaust valve core 304 through a branch pipe 305. When the exhaust valve core 304 is in the first position, the pressure chamber can communicate with the branch flow channel 3042. The limiting box 307 has a pressure relief structure, specifically, the pressure relief structure is located on the side wall of the sliding chamber. Two sliders 303 are slidably disposed in the two sliding chambers respectively. The sliders 303 are magnetic, and the end of the slider 303 closest to the magnet 302 has the opposite polarity to the magnet 302. The slider 303 is fixedly connected to the exhaust valve core 304 through a connecting rod 306. (Refer to...) Figure 4 For example, the left end of magnet 302 is the N pole and the right end is the S pole, the right end of slider 303 on the left end of magnet 302 is the S pole and the left end is the N pole, and the right end of slider 303 on the right end of magnet 302 is the S pole and the left end is the N pole.

[0059] In this embodiment, under the action of magnetic force, magnet 302 can attract slider 303 to move to the end of sliding chamber near magnet 302. During this process, slider 303 drives exhaust valve core 304 to move to the first position. The high-pressure gas inside tank 100 is divided into two paths. One path of gas is discharged to the outside of tank 100 through exhaust channel 3041, and the other path of gas enters the pressure chamber through branch channel 3042 and branch pipe 305, increasing the gas pressure in the pressure chamber. Since the pressure chamber and sliding chamber are connected, as the gas pressure in the pressure chamber gradually increases to a level greater than the magnetic force on slider 303, the high-pressure gas pushes slider 303 to slide to the end of sliding chamber away from magnet 302. During this process, slider 303 drives exhaust valve core 304 to move to the second position through connecting rod 306. Tank 100 stops venting, and the pressure in the pressure chamber is released through the pressure relief structure, causing the pressure to gradually decrease. When the pressure in the pressure chamber is less than the magnetic force on the slider 303, the slider 303 moves to the end of the sliding chamber closer to the magnet 302. This cycle repeats to achieve intermittent venting. When the tank 100 is filled with hydrogen, the connecting rod 306 can be manually fixed at the end away from the tank 100 to maintain the airtightness of the tank 100.

[0060] In some embodiments, the magnet 302 is an electromagnet, and the limit box 307 is provided with a switch 301. The switch 301 can control the electromagnet to be energized. The magnitude of the current can be changed to change the magnitude of the electromagnet's magnetism, and the polarity of the electromagnet can be changed by changing the direction of the current. The presence or absence of the electromagnet's magnetism can be controlled by the switch 301, and the reciprocating motion of the slider 303 can also be controlled by electrical control.

[0061] In some embodiments, a limiting piece is provided between the pressure chamber and the sliding chamber. The limiting piece is fixedly connected to the limiting box 307. The limiting piece has a first through hole in the middle, which is used to connect the pressure chamber and the sliding chamber. The diameter of the first through hole is slightly smaller than the inner diameter of the limiting box 307 to ensure that the pressure in the pressure chamber and the sliding chamber are equal.

[0062] In some embodiments, the limiting box 307 has second through holes at both ends, which communicate with the sliding chamber. The second through holes allow gas in the sliding chamber to escape as the slider 303 moves away from the magnet 302.

[0063] In some embodiments, the top of the exhaust head 101 and the bottom of the portion of the limiting box 307 having a sliding chamber are both provided with a sliding groove 308. The two ends of the connecting rod 306 are fixedly connected to the bottom of the slider 303 and the top of the exhaust valve core 304, respectively. The sliding groove 308 is used to allow the connecting rod 306 to move during its movement. The pressure relief structure includes the sliding groove 308 on the limiting box 307, which is located at the bottom of the sliding chamber. The sliding groove 308 prevents the connecting rod 306 from jamming during its movement. It should be noted that, referring to... Figure 7 When slider 303 is at the left limit position of the sliding chamber, the structure of slider 303 can completely block the slide groove 308. As the air pressure in the sliding chamber increases, when slider 303 moves to the right limit position of the sliding chamber, the slide groove 308 connects with the inside of the sliding chamber, so that the sliding chamber is depressurized. Under the action of magnetic force, slider 303 can move to the left limit position of the sliding chamber again.

[0064] In some embodiments, refer to Figure 6 The baffle 3044 is fixedly connected to the exhaust valve core 304 via a connecting column. A retaining ring is fixedly installed at the joint between the tank body 100 and the exhaust head 101. The diameter of the connecting column is smaller than the inner diameter of the retaining ring, and the diameter of the baffle 3044 is larger than the inner diameter of the retaining ring. When the baffle 3044 is in contact with the retaining ring, the tank body 100 is in a sealed state. When the baffle 3044 is separated from the retaining ring, the gas inside the tank body 100 can be discharged.

[0065] In some embodiments, the exhaust head 101 is located at the center of the end of the tank 100, which facilitates the effective discharge of air from inside the tank 100.

[0066] The working process of the sampling device for the analysis of the concentration of neutrophils in the above embodiment is as follows: connect the gas filling valve 200 to the gas filling pipe, turn on the switch 301, the electromagnet becomes magnetic, and under the action of magnetic force, the magnet 302 can attract the slider 303 to move to the end of the sliding chamber close to the magnet 302. During this process, the slider 303 drives the exhaust valve core 304 to move to the first position.

[0067] The high-pressure gas inside the tank 100 is divided into two paths. One path of gas is discharged to the outside of the tank 100 through the exhaust channel 3041, while the other path of gas enters the pressure chamber through the branch channel 3042 and the branch pipe 305, increasing the gas pressure inside the pressure chamber. Since the pressure chamber and the sliding chamber are connected, as the gas pressure inside the pressure chamber gradually increases to a level greater than the magnetic force acting on the slider 303, the high-pressure gas pushes the slider 303 to slide to the end of the sliding chamber away from the magnet 302. During this process, the slider 303 drives the exhaust valve core 304 to move to the second position via the connecting rod 306.

[0068] At this point, the tank 100 stops venting, and the pressure inside the pressure chamber leaks out through the groove 308 between the slider 303 and the limit box 307, causing the pressure to gradually decrease. When the pressure inside the pressure chamber is less than the magnetic force acting on the slider 303, the slider 303 moves to the end of the sliding chamber closer to the magnet 302. This cycle repeats, achieving the effect of intermittent venting. When the tank 100 is filled with hydrogen, the switch 301 can be closed to maintain the airtightness of the tank 100.

[0069] Another aspect of this invention provides a sampling method for the analysis of n-parahydrogen concentration. The method is applied to a sampling device used for the analysis of n-parahydrogen concentration, with reference to... Figure 8 The method includes the following steps:

[0070] S1. Hydrogen gas is introduced into the tank 100 through the filling valve 200.

[0071] S2. When the pressure inside the tank 100 increases, the exhaust control component 300 drives the exhaust valve core 304 to switch between the first position and the second position, and the two ends of the tank 100 intermittently discharge the original air inside the tank 100 and the impurities on the inner wall of the tank 100.

[0072] S3. After the tank 100 has exhausted all the original air, close the inflation valve 200 and lock the exhaust control component 300 or the manually controlled exhaust valve core 304 in the second position.

[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A sampling device for primary and secondary hydrogen concentration analysis, characterized by, The device comprises a tank body (100), an inflation valve (200) and an intermittent exhaust assembly; The inflation valve (200) is communicated with one end of the tank body (100), and the intermittent exhaust assembly is arranged on the tank body (100) and can make the gas in the tank body (100) intermittently exhaust from both ends of the tank body (100); The intermittent exhaust assembly comprises exhaust heads (101) arranged at both ends of the tank body (100), an exhaust valve core (304) and an exhaust control component (300); The exhaust heads (101) are connected with the inside of the tank body (100); The exhaust valve core (304) is slidingly arranged in the inside of the exhaust head (101), and is configured to be in communication with the tank body (100) and the exhaust head (101) when in a first position and be closed with the tank body (100) and the exhaust head (101) when in a second position; The exhaust control component (300) is arranged on the tank body (100) and connected with the exhaust valve core (304), and can drive the exhaust valve core (304) to switch between the first position and the second position; The exhaust valve core (304) has an exhaust flow channel (3041), a branch flow channel (3042) and an intake flow channel (3043) in the inside thereof; The exhaust control component (300) comprises a limiting box (307), a magnet (302) and two sliders (303); The limiting box (307) is arranged at the top of the tank body (100), and the extending direction of the limiting box (307) is the same as that of the tank body (100); The magnet (302) is fixedly arranged in the inside of the limiting box (307); Both ends of the limiting box (307) are provided with a pressure chamber and a sliding chamber, the pressure chamber and the sliding chamber are communicated, the pressure chamber is located between the magnet (302) and the sliding chamber, the pressure chamber is communicated with the side wall of the exhaust valve core (304) through a branch pipeline (305), when the exhaust valve core (304) is in the first position, the pressure chamber can be communicated with the branch flow channel (3042), and the limiting box (307) has a pressure relief structure; The two sliders (303) are slidingly arranged in the two sliding chambers respectively, the sliders (303) have magnetism, one end of the slider (303) close to the magnet (302) is opposite in polarity to the magnet (302), and the slider (303) is fixedly connected with the exhaust valve core (304) through a connecting rod (306).

2. The sampling device for primary and secondary hydrogen concentration analysis according to claim 1, wherein One end of the exhaust flow channel (3041) is communicated with one end of the exhaust valve core (304) away from the tank body (100), the other end of the exhaust flow channel (3041) is arranged in the inside of the exhaust valve core (304), and the outlet end of the exhaust flow channel (3041) is a necked structure. One end of the branch flow channel (3042) is in communication with the middle of the exhaust flow channel (3041), and the other end of the branch flow channel (3042) is in communication with the side wall of the exhaust valve core (304), and the other end of the branch flow channel (3042) can be in communication with the exhaust control component (300) when the exhaust valve core (304) is in the first position; One end of the intake flow channel (3043) is in communication with the middle of the exhaust flow channel (3041), and the other end of the intake flow channel (3043) is in communication with one end of the exhaust valve core (304) close to the tank body (100); The exhaust valve core (304) is fixedly connected with a baffle (3044) at one end close to the tank body (100), and the baffle (3044) is used to make the joint part of the tank body (100) and the exhaust head (101) open or closed.

3. The sampling device for primary and secondary hydrogen concentration analysis according to claim 1, characterized by, The magnet (302) is an electromagnet, and a switch (301) is arranged on the limiting box (307), and the switch (301) can control the electrification of the electromagnet.

4. The sampling device for primary and secondary hydrogen concentration analysis according to claim 1, characterized by, A limiting sheet is arranged between the pressure chamber and the sliding chamber, the limiting sheet is fixedly connected with the limiting box (307), and the middle of the limiting sheet has a first through hole for communicating the pressure chamber and the sliding chamber.

5. The sampling device for primary and secondary hydrogen concentration analysis according to claim 1, characterized by, The limiting box (307) has a second through hole at both ends, and the second through hole is in communication with the sliding chamber.

6. The sampling device for primary and secondary hydrogen concentration analysis of claim 1, wherein, The top of the exhaust head (101) and the bottom of the part of the structure of the sliding chamber of the limiting box (307) are provided with a sliding groove (308), both ends of the connecting rod (306) are fixedly connected with the bottom of the sliding block (303) and the top of the exhaust valve core (304) respectively, and the sliding groove (308) is used for the accommodation of the connecting rod (306) during movement. The pressure relief structure includes the sliding groove (308) on the limiting box (307).

7. The sampling device for primary and secondary hydrogen concentration analysis according to claim 2, characterized by, The baffle (3044) is fixedly connected with the exhaust valve core (304) through a connecting column, a retaining ring is fixedly arranged at the joint part of the tank body (100) and the exhaust head (101), the diameter of the connecting column is smaller than the inner diameter of the retaining ring, and the diameter of the baffle (3044) is greater than the inner diameter of the retaining ring.

8. The sampling device for primary and secondary hydrogen concentration analysis according to claim 7, characterized by, The exhaust head (101) is located at the center position of the end of the tank body (100).

9. A sampling method for primary and secondary hydrogen concentration analysis, the method being applied to the sampling device for primary and secondary hydrogen concentration analysis according to any one of claims 1 to 8, characterized in that, The method comprises the following steps: Hydrogen is filled into the tank body (100) through the inflation valve (200); When the pressure in the tank body (100) rises, the exhaust control component (300) drives the exhaust valve core (304) to switch between the first position and the second position, and the tank body (100) intermittently discharges the original air in the tank body (100) and the impurities on the inner wall of the tank body (100); After the tank body (100) discharges the original air, the inflation valve (200) is closed, and the exhaust control component (300) manually controls the exhaust valve core (304) to be locked in the second position.

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