Hydrogen purity monitoring sample port assembly

Abstract

The utility model relates to gas sampling device technical field discloses a kind of hydrogen purity monitoring sampling port subassembly, including transmission pipe, detection mechanism, sealing mechanism and control valve, the sampling port inside of detection mechanism is equipped with valve core, sealing plate and the fixing ring of outside, the transmission pipe inside of sealing mechanism is equipped with valve, connecting shaft, pivot, transmission pipe outer wall is fixedly connected with support ring, support ring is connected with connecting ring by connecting rod, connecting rod is connected with fixed plate.The utility model is equipped with multiple sealing structure and self-sealing valve core detection mechanism, solve the problem of easy leakage in sampling process in prior art, by setting up sealing mechanism with valve and mechanical locking structure, solve the problem of lack of main pipeline safety isolation mechanism in prior art, while providing safe operation environment, the convenience of sampling process and the purity of sample are guaranteed, the accuracy of monitoring is improved.

Description

Technical Field

[0001] This utility model relates to the field of gas sampling device technology, and in particular to a hydrogen purity monitoring sampling port component. Background Technology

[0002] Hydrogen energy, as a clean energy source, has broad application prospects in many fields. The purity of hydrogen directly affects the working performance and service life of downstream application equipment such as fuel cells. Therefore, real-time and accurate monitoring of hydrogen purity has become a key technical aspect in the process of hydrogen preparation, storage and transportation.

[0003] Hydrogen purity monitoring typically requires obtaining gas samples from high-pressure hydrogen pipelines. Existing solutions usually involve installing simple valves as sampling ports on the pipelines, with operators controlling sampling by opening and closing the valves. However, this structure directly exposes operators to a high-pressure hydrogen environment. In the event of misoperation or valve seal failure, high-pressure hydrogen can be released directly, posing a serious safety hazard. To improve safety, some solutions use threaded joints for sealing when connecting the sampling tube. However, during the connection and disconnection of the sampling tube, some hydrogen inevitably leaks into the atmosphere. Due to the small size and high permeability of hydrogen molecules, conventional sealing structures cannot achieve zero leakage. This not only wastes energy but also accumulates safety risks at the work site.

[0004] In addition, hydrogen samples taken directly from the main pipeline may carry tiny solid particles or oily impurities from the pipeline. If these impurities are not treated before entering a precision purity analyzer, they will interfere with the accuracy of the analysis results and may even damage the internal sensors and flow paths of the instrument. Existing sampling ports generally lack integrated sample pretreatment functions, resulting in insufficient reliability of monitoring data and increased maintenance costs for subsequent equipment.

[0005] Therefore, this utility model proposes a hydrogen purity monitoring sampling port component to address the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems existing in the hydrogen purity monitoring sampling port assembly, such as the lack of a safety isolation mechanism from the main pipeline, high operational risk, easy leakage during the sampling process and easy sample contamination, and limited functionality, this utility model aims to provide a hydrogen purity monitoring sampling port assembly with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a hydrogen purity monitoring sampling port assembly, including: a transmission pipe, a detection mechanism, a sealing mechanism, a control valve, a valve core and a sealing plate disposed in the detection mechanism, and a valve, a connecting shaft, a rotating shaft, a support ring, a connecting ring, a connecting rod and a fixing plate disposed in the sealing mechanism.

[0008] The sampling port of the detection mechanism is equipped with a valve core and multiple sealing plates inside, which are opened by the sampling tube, and a fixing ring for locking the sampling tube on the outside.

[0009] Furthermore, the valve of the sealing mechanism is located inside the transmission pipe and connected to the rotating shaft via a connecting shaft. A support ring is fixed to the outer wall of the transmission pipe. The support ring and the connecting ring surrounding the rotating shaft are connected via a connecting rod. A fixed plate connected to the connecting rod is pivotally connected to the connecting rod. By moving the fixed plate, the connecting rod is driven to move, so that the support ring and the connecting ring are pressed together to lock the rotating shaft.

[0010] Preferably, the detection mechanism further includes a sampling tank and a pressure gauge, both of which are mounted on the filter tank, and the sampling tank is used to filter hydrogen gas.

[0011] Preferably, the filter canister is provided with a sealing plug, which is screwed into or out of the filter canister by threads to control the opening and closing of the sampling port.

[0012] Preferably, a gasket is provided around the valve core, the gasket being used to enhance the sealing between the valve core and the sealing plate after the valve core is reset.

[0013] Preferably, the detection mechanism further includes a sealing cap, which is detachably connected to the front end of the fixing ring for sealing the sampling port when not sampling.

[0014] Preferably, a gasket is fixedly connected to the inner side of the fixing plate, and the gasket is used to increase the connection stability after the fixing plate and the connecting ring are pressed together.

[0015] Preferably, the hydrogen purity monitoring sampling port assembly further includes a rotary handle, which is fixedly connected to the valve stem of the control valve and is used to operate the opening and closing of the control valve.

[0016] Preferably, one end of the connecting shaft is rotatably connected to the valve, and the other end of the connecting shaft is rotatably connected to the rotating shaft.

[0017] Preferably, the two ends of the connecting rod are pivotally connected to the support ring and the connecting ring, respectively.

[0018] Preferably, a plurality of sealing plates are fixedly connected axially inside the sampling port, and the sealing plates are used to guide the sampling tube and provide multi-level sealing.

[0019] This utility model has the following beneficial effects:

[0020] 1. This utility model, by setting up a mechanical locking sealing mechanism consisting of a support ring, a connecting ring, a connecting rod, and a fixing plate working together, can forcibly lock the main valve inside the transmission pipe before sampling. This solves the problem in the prior art that the sampling port generally lacks reliable and safe isolation from the high-pressure airflow of the main pipeline, resulting in high operational risks. It achieves the goal of creating a safe and stable air pressure environment for operators during sampling operations, greatly improving the safety of monitoring work.

[0021] This invention solves the problems of simple sampling port structure, poor sealing, easy leakage during operation, and easy sample contamination in the prior art by setting a self-sealing structure inside the sampling port with a valve core that can be opened by the sampling tube and automatically reset after being pulled out, and multiple sealing plates, and supplemented by sampling can for pre-filtration. It achieves the effects of convenient and fast sampling process, strong sealing, effective prevention of hydrogen leakage, and ensuring sample purity, thereby ensuring the accuracy of subsequent purity analysis results. Attached Figure Description

[0022] Figure 1 This is a perspective view of a hydrogen purity monitoring sampling port assembly proposed in this utility model.

[0023] Figure 2 This is a front view of a hydrogen purity monitoring sampling port assembly proposed in this utility model;

[0024] Figure 3 This is a partial structural exploded view of a hydrogen purity monitoring sampling port assembly proposed in this utility model.

[0025] Figure 4 This is a partial exploded view of the hydrogen purity monitoring sampling port component proposed in this utility model.

[0026] Legend:

[0027] 1. Transmission pipe; 2. Detection mechanism; 201. Filter canister; 202. Sampling canister; 203. Pressure gauge; 204. Sealing plug; 205. Sealing plate; 206. Gasket; 207. Valve core; 208. Fixing ring; 209. Sealing cover; 3. Sealing mechanism; 301. Support ring; 302. Connecting shaft; 303. Valve; 304. Rotating shaft; 305. Connecting ring; 306. Connecting rod; 307. Fixing plate; 308. Gasket; 4. Control valve; 5. Throttle. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0029] Example:

[0030] Please refer to Figures 1 to 4 This utility model provides a hydrogen purity monitoring sampling port component, which aims to solve the problems of existing hydrogen pipeline sampling ports having a simple structure, insufficient sealing, and lack of a safety isolation mechanism from the main pipeline, thus affecting the safety of monitoring operations and the accuracy of results.

[0031] like Figure 1 and Figure 2 As shown, the hydrogen purity monitoring sampling port assembly includes a transmission pipe 1 and a detection mechanism 2 disposed on the outer wall of the transmission pipe 1. A sealing mechanism 3 is provided at the tail end of the transmission pipe 1, and a control valve 4 connects the transmission pipe 1 and the detection mechanism 2. The transmission pipe 1 is the core pipeline for carrying the flow of hydrogen, while the detection mechanism 2 is used to realize the functions of hydrogen sampling, filtration, and pressure monitoring. The sealing mechanism 3 is used to safely isolate the hydrogen inside the transmission pipe 1 during sampling operations, and the control valve 4 is used to control the flow rate of hydrogen entering the detection mechanism 2. In addition, the hydrogen purity monitoring sampling port assembly also includes a handle 5, which is fixedly connected to the valve stem of the control valve 4 and is used to operate the opening and closing of the control valve 4.

[0032] The left end of the detection mechanism 2 is connected to the transmission pipe 1 via a control valve 4 and to a handle 5. Rotating the handle 5 opens or closes the control valve 4. The detection mechanism 2 includes a filter canister 201, which is connected to the right port of the control valve 4. A sealing plug 204 is located above the filter canister 201. The sealing plug 204 is screwed into or out of the filter canister 201 via a thread to control the opening and closing of the sampling port and ensure the sealing before sampling. A pressure gauge 203 is installed on the right side of the filter canister 201. The pressure gauge 203 is used to monitor the gas pressure in the sampling canister 202 and the transmission pipe 1 in real time. During monitoring, the sampling canister 202 is connected below the pressure gauge 203 and to the right side of the filter canister 201. The sampling canister 202 is used to filter impurities in the hydrogen gas. A sampling port is provided at the junction of the filter canister 201 and the sealing plug 204. Multiple sealing plates 205 are axially fixedly connected inside the sampling port. These sealing plates 205 guide the sampling tube and provide multi-stage sealing. After the sampling tube penetrates the sealing plate 205, it pushes the valve core 207 inside the sealing plate 205. The valve core 207 expels gas from the transmission pipe 1 into the sampling tube. A washer 206 is embedded around the valve core 207, ensuring a tight seal between the valve core 207 and the sealing plate 205 after the valve core 207 is reset. A fixing ring 208 is provided around the sealing plate 205. By rotating the fixing ring 208, the sampling tube can be adjusted and fixed, increasing the fixing depth and the sealing of the connection. After sampling is completed, the sampling tube is removed, and the valve core 207 will automatically spring back to block the pipeline. The front end of the retaining ring 208 is provided with a sealing cap 209, which is detachably connected to the front end of the retaining ring 208. It is used to seal the sampling port when not sampling, to ensure the sealing of the structural connection and prevent the risk of leakage during the sampling process.

[0033] The sealing mechanism 3 works in conjunction with the control valve 4 to create a pressure environment that is easy to monitor. The sealing mechanism 3 includes a valve 303 located inside the transmission pipe 1, which is used to block hydrogen gas inside the transmission pipe 1. The valve 303 is rotatably connected to the rotating shaft 304 via a connecting shaft 302. One end of the connecting shaft 302 is rotatably connected to the valve 303, and the other end of the connecting shaft 302 is rotatably connected to the rotating shaft 304. A support ring 301 is fixedly connected to the connection between the transmission pipe 1 and the rotating shaft 304. A connecting ring 305 is rotatably connected below the support ring 301 and surrounds the rotating shaft 304. A connecting rod 306 is rotatably connected to the junction of the support ring 301 and the connecting ring 305. The two ends of the connecting rod 306 are pivotally connected to the support ring 301 and the connecting ring 305, respectively. One end of the connecting rod 306 is connected to a fixing plate 307, which is pivotally connected to the connecting rod 306. By moving the fixing plate 307, the connecting rod 306 can be driven to move, causing the support ring 301 and the connecting ring 305 to press and engage, thereby locking the rotating shaft 304. A gasket 308 is fixedly connected to the inner center of the fixing plate 307. The gasket 308 is used to increase the connection stability after the fixing plate 307 and the connecting ring 305 are pressed together, ensuring the ease of connection and fixing the upper connecting shaft 302, thereby achieving the effect of stabilizing the internal valve 303 and ensuring the sealing effect of the structural connection output.

[0034] Please refer to Figure 3 and Figure 4 The sealing mechanism 3 is designed to provide a safety barrier for the main road. The sealing mechanism 3 includes a support ring 301 fixedly connected to the outer wall of the transmission pipe 1. The support ring 301 surrounds the transmission pipe 1 and provides a stable mounting base for other components. A connecting ring 305 is located below the support ring 301, surrounding the outer periphery of the rotating shaft 304. The connecting ring 305 applies a clamping force to the rotating shaft 304 during locking. The support ring 301 and the connecting ring 305 are pivotally connected via a connecting rod 306. Specifically, both ends of the connecting rod 306 are pivotally connected to corresponding lugs on the support ring 301 and the connecting ring 305, respectively. One end of the connecting rod 306 can also be pivotally connected to a fixing plate 307, which serves as... The operating handle is used to pull the fixed plate 307 upward, which drives the connecting rod 306 to move using the lever principle. This pulls the support ring 301 and the connecting ring 305 closer together and presses them tightly together. This toggle clamp-type locking structure with the midpoint can generate a huge clamping force to firmly lock the connecting ring 305 onto the rotating shaft 304, thereby preventing the rotating shaft 304 from rotating at all. This ensures that the valve 303 connected to the rotating shaft 304 is in a stable closed state, and realizes the reliable cut-off of the hydrogen flow inside the transmission pipe 1. A gasket 308 is fixedly connected to the inner surface of the fixed plate 307. The gasket 308 plays a role in buffering and increasing stability after the fixed plate 307 and the connecting ring 305 are pressed together.

[0035] Meanwhile, testing agency 2 provides a safe and convenient sampling interface; please refer to [link / reference]. Figure 3 The core component of the testing mechanism 2 is the filter tank 201. The filter tank 201 is integrally formed or welded onto the transmission pipe 1 and is connected to the control valve 4. A sealing plug 204 is installed on the upper part of the filter tank 201 by a threaded connection. The screwing in and out of the sealing plug 204 can physically open or block the internal channel leading to the sampling port. A sampling port is also provided on the side wall of the filter tank 201. Multiple sealing plates 205 are fixedly arranged axially inside the sampling port. The center of the sealing plate 205 has a through hole for guiding and initially sealing the inserted sampling tube. Inside the sealing plate 205, there is a valve core 207 that can slide back and forth axially. In its natural state, the valve core 207 relies on the elasticity of its internal spring to seal the internal channel. A washer 206 is embedded on the outer periphery of the valve core 207 to enhance the sealing effect. When the sampling tube is inserted, the front end of the sampling tube will push open the valve core 207, thereby establishing a sampling channel. A fixing ring 208 is provided outside the sampling port. The fixing ring 208 is connected to the filter canister 201 by threads to press and fix the inserted sampling tube. After sampling is completed, the sampling tube is pulled out, and the valve core 207 automatically resets and seals the channel again. Finally, the sealing cap 209 is screwed onto the front end of the fixing ring 208 to provide final dustproof and leakproof protection for the entire sampling port.

[0036] As a preferred embodiment, in order to filter the hydrogen sample before sampling and monitor the pipeline pressure in real time, please refer to... Figure 3 The testing unit 2 also includes a sampling tank 202 and a pressure gauge 203. Both the sampling tank 202 and the pressure gauge 203 are installed on the filter tank 201. The interior of the sampling tank 202 is filled with filter cotton or molecular sieve material to filter out solid particles or oil impurities that may be carried in the hydrogen gas, ensuring the purity of the sample entering the analytical instrument. The pressure gauge 203 is installed on the pressure measuring port reserved in the filter tank 201 through a standard threaded interface, which is used to visually display the real-time gas pressure in the sampling area, providing operators with a basis for judging whether the pipeline is in a safe operating state.

[0037] As a preferred embodiment, to provide a reliable and easy-to-operate primary seal for the sampling channel, please refer to... Figure 3 The filter canister 201 is provided with a sealing plug 204. The sealing plug 204 has an external thread and is connected to the internal thread corresponding to the filter canister 201. The top of the sealing plug 204 is provided with a knurled handle for easy manual turning, and the bottom of the sealing plug 204 is provided with an annular sealing ring. When the sealing plug 204 is tightened, the bottom of the sealing plug 204 can tightly press against the entrance of the sampling channel to achieve physical isolation.

[0038] As a preferred embodiment, to improve the reliability and airtightness of the valve core 207 self-sealing structure, please refer to... Figure 3 A gasket 206 is embedded in the annular groove around the valve core 207. The gasket 206 is preferably made of fluororubber or perfluoroether rubber material that is resistant to hydrogen permeation and high pressure. When the valve core 207 is reset by elastic force to close the channel, the gasket 206 can form a tight elastic interference fit with the inner hole of the sealing plate 205, effectively preventing the leakage of trace amounts of hydrogen.

[0039] As a preferred embodiment, to provide double sealing protection for the sampling port, prevent dust and moisture intrusion, and eliminate any potential risk of micro-leakage, please refer to... Figure 2 and Figure 3 The testing mechanism 2 also includes a sealing cover 209. The sealing cover 209 has an internal thread and is detachably threaded to the external thread at the front end of the fixing ring 208. The sealing cover 209 also has a sealing gasket 308 embedded inside. When the sealing cover 209 is tightened, the sealing gasket 308 is pressed against the end face of the fixing ring 208 to form a reliable end face seal.

[0040] As a preferred embodiment, to enhance the stability and vibration resistance of the sealing mechanism 3 in the locked state, please refer to... Figure 4 On the inner surface of the fixing plate 307, i.e. the surface in contact with the connecting ring 305, a gasket 308 is fixedly connected by adhesive or riveting. The gasket 308 is made of a high-hardness polymer or a soft metal material such as copper. When the fixing plate 307 is moved into place and the connecting ring 305 is pressed, the gasket 308 can increase the contact area, provide cushioning and prevent the high-strength clamping force from damaging the surface of the connecting ring 305.

[0041] As a preferred embodiment, for the convenience of the user in operating the control valve 4, please refer to... Figure 1 and Figure 2 The assembly also includes a throttle 5, which has a mounting hole, such as a square hole or a spline hole, that is adapted to the shape of the valve stem head of the control valve 4. The throttle 5 is fitted onto the valve stem of the control valve 4 through this mounting hole and is fixedly connected with a set screw to ensure that the valve stem can be rotated without slippage when the throttle 5 is turned.

[0042] As a preferred embodiment, to clearly define the power transmission path inside the sealing mechanism 3, please refer to... Figure 4 As a key component for transmitting torque, the connecting shaft 302 has a drive head at one end, which is inserted into the corresponding groove of the valve 303 to form a rotatable connection. The other end of the connecting shaft 302 is rotatably connected to the bottom of the rotating shaft 304 through a pin, ensuring that the rotational movement of the rotating shaft 304 operated from the outside can be accurately transmitted to the valve 303 inside.

[0043] As a preferred embodiment, to clarify the kinematic relationship of the toggle clamp-type locking structure, please refer to... Figure 4 The connecting rod 306 has pin holes at both ends, and forms a pivotal connection with the pre-set lugs on the support ring 301 and the connecting ring 305 through the pin shaft. This double pivot connection method allows the connecting rod 306 to act as a connecting rod, and under the drive of the fixed plate 307, smoothly pull the support ring 301 and the connecting ring 305 closer or push them apart.

[0044] As a preferred embodiment, to improve the guiding accuracy and sealing performance of the sampling tube, please refer to... Figure 3 Multiple sealing plates 205 are fixedly connected at equal intervals along the axial direction inside the sampling port. These sealing plates 205 are fixed to the inner wall of the filter tank 201 by press fitting or snap rings, forming a multi-stage guiding and sealing channel. When the sampling tube is inserted, it can ensure that the sampling tube enters straight and is accurately aligned with the valve core 207. At the same time, each sealing plate 205 plays a role in sealing and supporting.

[0045] Working principle: When it is necessary to monitor the purity of hydrogen in transmission pipe 1, the operator first rotates handle 5 to close control valve 4, achieving initial isolation of detection mechanism 2. Subsequently, the operator pulls the fixing plate 307 of sealing mechanism 3 upward. Since the fixing plate 307 is pivotally connected to connecting rod 306, this pulling action will drive connecting rod 306 through leverage. Because the two ends of connecting rod 306 are pivotally connected to fixed support ring 301 and movable connecting ring 305 respectively, the movement of connecting rod 306 will forcibly move the connecting ring... 305 is pulled toward the support ring 301, thereby tightly gripping and locking the internal rotating shaft 304. Since the rotating shaft 304 is connected to the valve 303 inside the transmission pipe 1 through the connecting shaft 302, locking the rotating shaft 304 completes the reliable fixation of the valve 303 in the closed position, thereby completely cutting off the main hydrogen flow in the transmission pipe 1. At this time, the operator can confirm the safety of the sampling area pressure through the pressure gauge 203. The whole process solves the problem of lack of main road safety isolation mechanism in the prior art through the synergistic action of the sealing mechanism 3.

[0046] This provides an absolutely safe operating environment for subsequent sampling. Next, the sampling operation is performed. The operator first loosens and removes the sealing cap 209, then loosens the sealing plug 204 to open the internal channel. The sampling tube is then inserted, its end aligned with the sampling port. Guided by multiple sealing plates 205, the sampling tube is precisely advanced until its tip touches the valve core 207. Further advancement of the sampling tube overcomes the spring force inside the valve core 207, opening it and instantly establishing a flow path connecting the hydrogen in the isolated area to the sampling tube. After the hydrogen flows out, it first passes through the sampling tank 202, where it undergoes filtration and purification before entering the sampling tube. The operator... The sampling tube can be tightened and fixed by rotating the retaining ring 208 to prevent shaking or leakage during sampling. After sampling, the operator pulls out the sampling tube. At the moment the sampling tube is removed, the valve core 207 immediately and automatically resets under the action of the internal spring force. The tight fit between the washer 206 and the sealing plate 205 quickly and reliably seals the channel. This self-sealing structure effectively solves the problem of hydrogen leakage that easily occurs at the moment of operation in traditional sampling ports. Finally, the operator tightens the sealing plug 204 and re-tightens the sealing cap 209 to complete the double seal. After restoring the sealing mechanism 3 and the control valve 4, the transmission pipe 1 can resume normal gas delivery.

Claims

1. A hydrogen purity monitoring sampling port assembly, comprising a transmission tube (1), a detection mechanism (2), a sealing mechanism (3), and a control valve (4); Its features are, The detection mechanism (2) includes a filter canister (201) connected to the control valve (4). The filter canister (201) is provided with a sampling port. The sampling port is provided with a sealing plate (205) and a valve core (207) that is opened by the sampling tube. The sampling port is provided with a fixing ring (208) for locking the sampling tube. The sealing mechanism (3) includes a valve (303) located inside the transmission pipe (1). The valve (303) is connected to the rotating shaft (304) via a connecting shaft (302). A support ring (301) is fixed to the outer wall of the transmission pipe (1). The support ring (301) and the connecting ring (305) surrounding the rotating shaft (304) are connected via a connecting rod (306). One end of the connecting rod (306) is connected to a fixing plate (307). The fixing plate (307) is pivotally connected to the connecting rod (306). By moving the fixing plate (307), the connecting rod (306) is driven to move, so that the support ring (301) and the connecting ring (305) are pressed together to lock the rotating shaft (304).

2. The hydrogen purity monitoring sampling port assembly according to claim 1, characterized in that, The detection mechanism (2) also includes a sampling tank (202) and a pressure gauge (203). The sampling tank (202) and the pressure gauge (203) are both installed on the filter tank (201). The sampling tank (202) is used to filter hydrogen.

3. The hydrogen purity monitoring sampling port assembly according to claim 2, characterized in that, The filter canister (201) is provided with a sealing plug (204), which is screwed into or out of the filter canister (201) by threads to control the opening and closing of the sampling port.

4. The hydrogen purity monitoring sampling port assembly according to claim 1, characterized in that, The valve core (207) is provided with a gasket (206) around its periphery. The gasket (206) is used to enhance the sealing between the valve core (207) and the sealing plate (205) after the valve core (207) is reset.

5. The hydrogen purity monitoring sampling port assembly according to claim 1, characterized in that, The detection mechanism (2) also includes a sealing cap (209), which is detachably connected to the front end of the fixing ring (208) for sealing the sampling port in a non-sampling state.

6. The hydrogen purity monitoring sampling port assembly according to claim 1, characterized in that, A gasket (308) is fixedly connected to the inner side of the fixing plate (307). The gasket (308) is used to increase the connection stability after the fixing plate (307) and the connecting ring (305) are pressed together.

7. The hydrogen purity monitoring sampling port assembly according to claim 1, characterized in that, The component also includes a throttle (5), which is fixedly connected to the valve stem of the control valve (4) and is used to operate the opening and closing of the control valve (4).

8. The hydrogen purity monitoring sampling port assembly according to claim 1, characterized in that, One end of the connecting shaft (302) is rotatably connected to the valve (303), and the other end of the connecting shaft (302) is rotatably connected to the rotating shaft (304).

9. The hydrogen purity monitoring sampling port assembly according to claim 1, characterized in that, The two ends of the connecting rod (306) are pivotally connected to the support ring (301) and the connecting ring (305), respectively.

10. A hydrogen purity monitoring sampling port assembly according to claim 1, characterized in that, Multiple sealing plates (205) are fixedly connected axially inside the sampling port. The sealing plates (205) are used to guide the sampling tube and provide multi-level sealing.

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