An online paramagnetic oxygen analyzer

Abstract

The application relates to the technical field of gas detection, in particular to an online paramagnetic oxygen analyzer which comprises a shell, sealing plates are fixedly installed at the front and rear ends of the shell, a surrounding air bag is arranged in the inner cavity of the shell, an analyzer main body is communicated with the inner side of the surrounding air bag, a paramagnetic oxygen sensor is fixedly installed in the inner cavity of the paramagnetic oxygen analyzer, an air inlet pipe is communicated with the input end of the paramagnetic oxygen sensor, an air outlet pipe is communicated with the output end of the paramagnetic oxygen sensor, one end of the air outlet pipe away from the paramagnetic oxygen sensor is communicated with the surrounding air bag, an electromagnetic valve two is fixedly installed on the wall of the air outlet pipe, and an air outlet pipe is communicated with the side wall of the surrounding air bag. Workers can specifically determine which part of the device main body has the air leakage phenomenon according to the values of the first detection and the second detection monitored by the infrared distance sensor, thereby reducing the workload of the maintenance personnel and improving the maintenance efficiency.

Description

Technical Field

[0001] This invention relates to the field of gas detection technology, and in particular to an online paramagnetic oxygen analyzer. Background Technology

[0002] Online paramagnetic oxygen analyzers are important gas analysis instruments widely used in industrial processes and scientific laboratories for online monitoring of oxygen content in gases. The working principle of online paramagnetic oxygen analyzers is based on the paramagnetism of oxygen. Paramagnetism refers to the property of a substance whose magnetization under the influence of an external magnetic field is directly proportional to the strength of the magnetic field. Oxygen molecules exhibit paramagnetism at low temperatures, meaning that when oxygen molecules are subjected to an external magnetic field, their magnetization is directly proportional to the strength of the magnetic field. Because the volume magnetic susceptibility of oxygen is much greater than that of other gases, the paramagnetism of oxygen can be used to analyze oxygen concentration. Online paramagnetic oxygen analyzers have a wide range of applications, mainly in air separation, chemical, food, and medical industries. In the air separation industry, this instrument is used to measure the oxygen content in the air to ensure its quality and purity. During use, external air or other gases may seep into the measuring unit, which can interfere with oxygen measurement. In particular, the integrity of the analyzer's casing, sensor housing, and the connection points of the sensor's input and output terminals, the stability of the welds, and the sealing of valves and connecting pipes can all become points of risk for leakage. When existing paramagnetic oxygen analyzers experience air leakage during use, staff typically need to conduct a comprehensive inspection of the analyzer. This process is time-consuming and involves a large amount of work, resulting in slow repair speed. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the background art by proposing an online paramagnetic oxygen analyzer.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an online paramagnetic oxygen analyzer, comprising a housing, with sealing plates fixedly installed at both the front and rear ends of the housing; a surrounding airbag is disposed within the inner cavity of the housing, and the analyzer body is connected to the inner side of the surrounding airbag; a paramagnetic oxygen sensor is fixedly installed within the inner cavity of the paramagnetic oxygen analyzer; an air inlet pipe is connected to the input end of the paramagnetic oxygen sensor, and an air delivery pipe is connected to the output end of the paramagnetic oxygen sensor, with the end of the air delivery pipe away from the paramagnetic oxygen sensor connected to the surrounding airbag; a second solenoid valve is fixedly installed on the wall of the air delivery pipe; an air outlet pipe is connected to the side wall of the surrounding airbag and extends to the outside of the housing; a first solenoid valve is fixedly installed on the wall of the air outlet pipe; several sleeves are welded to both the upper and lower ends of the housing; piston rods are slidably disposed within the inner cavities of the several sleeves; and the tops of the several piston rods are connected to... There is a spring, and the side of each spring away from the corresponding piston rod is connected to the inner wall of the corresponding sleeve cavity. A manifold 1 is connected between the tops of the sleeves located at the top of the outer shell, and a manifold 2 is connected between the bottoms of the sleeves located at the bottom of the outer shell. A liquid storage tube is connected between the manifold 1 and the manifold 2, and the side of the liquid storage tube closest to the outer shell is fixedly installed on the side wall of the outer shell. A detection tube is connected to the top of the liquid storage tube, and a spring 2 is connected to the top of the inner cavity of the detection tube. A piston plate is connected to the bottom of the spring 2. An infrared ranging sensor is fixedly installed on the top of the detection tube, and the detection end of the infrared ranging sensor extends to the top of the inner cavity of the detection tube. The operator can use the values ​​of the first and second detections monitored by the infrared ranging sensor to specifically determine which part of the main body of the device has an air leak, thereby reducing the workload of maintenance personnel and improving maintenance efficiency.

[0005] In the aforementioned online paramagnetic oxygen analyzer, an electric push rod is fixedly installed on the side wall of the liquid storage tube. A push plate is fixedly installed on the telescopic end of the electric push rod. A through hole is opened on one side wall of the push plate. An insert rod is welded to the side wall of the inner cavity of the liquid storage tube. An arc-shaped plate is welded to one side wall of the push plate. A push plate two is welded to the side of the arc-shaped plate away from the push plate one. A through hole two is opened on the side wall of the push plate two. An insert rod two is welded to the side wall of the inner cavity of the liquid storage tube. The piston rod presses down to squeeze the surrounding air bladder, causing the gas in the inner cavity of the surrounding air bladder to flow. Since the surrounding air bladder is connected to the main body of the analyzer, the flowing gas can reduce the preheating time, thereby improving the preheating efficiency.

[0006] In the aforementioned online paramagnetic oxygen analyzer, inclined blocks 1 and 2 are welded to the sides of pusher plate 1 and pusher plate 2 respectively, and an inclined plate is welded to the bottom of piston plate. The piston plate pushes the colored liquid in the storage tube and detection tube into the manifold 2, causing the piston rods on both the upper and lower sides to simultaneously squeeze the surrounding air bladder, thereby increasing the internal air pressure of the surrounding air bladder. During this process, mechanical energy is converted into the internal energy of the gas, and the increase in internal energy is manifested as an increase in gas temperature. This further improves the preheating efficiency.

[0007] In the aforementioned online paramagnetic oxygen analyzer, both sealing plates are made of transparent plastic, which allows the inner cavity of the housing to form a sealed space.

[0008] In the aforementioned online paramagnetic oxygen analyzer, a display screen is fixedly installed at the front end of the analyzer body, allowing staff to view the operating status of the analyzer body on the display screen.

[0009] In the aforementioned online paramagnetic oxygen analyzer, four mounting plates are fixedly installed on the side wall of the outer casing. Each mounting plate has a positioning hole on its side wall. The device is fixedly installed in a designated position by means of the mounting plates and positioning holes on the side wall of the outer casing.

[0010] In the above-mentioned online paramagnetic oxygen analyzer, a first connecting air hole is provided at both the upper and lower ends of the inner side of the surrounding airbag, and a second connecting air hole is provided at both the upper and lower ends of the analyzer body.

[0011] Compared with existing technologies, the advantages of this online paramagnetic oxygen analyzer are:

[0012] 1. Staff can use the values ​​from the first and second detections monitored by the infrared ranging sensor to determine which part of the main body of the device is leaking air, thereby reducing the workload of maintenance personnel and improving maintenance efficiency.

[0013] 2. The piston rod presses down on the surrounding airbag, causing the gas inside the airbag to flow. Since the surrounding airbag is connected to the main body of the analyzer, the flowing gas can reduce the preheating time and thus improve the preheating efficiency.

[0014] 3. The piston rods on both the upper and lower sides simultaneously compress the surrounding airbag, thereby increasing the air pressure inside the surrounding airbag. During this process, mechanical energy is converted into the internal energy of the gas, and the increase in internal energy manifests as an increase in gas temperature, which further improves the preheating efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an online paramagnetic oxygen analyzer proposed in this invention;

[0016] Figure 2This is a schematic diagram of the inner cavity structure of the outer shell of the present invention;

[0017] Figure 3 This is a schematic diagram of the back structure of the outer shell of the present invention;

[0018] Figure 4 This is a schematic diagram of the intake pipe structure of the present invention;

[0019] Figure 5 This is a schematic diagram of the piston rod structure of the present invention;

[0020] Figure 6 This is a schematic diagram of the surrounding airbag structure of the present invention;

[0021] Figure 7 This is a schematic diagram of the main structure of the analyzer of the present invention;

[0022] Figure 8 This is a schematic diagram of the paramagnetic oxygen sensor structure of the present invention;

[0023] Figure 9 This is a schematic diagram of the internal structure of the liquid storage tube of the present invention;

[0024] Figure 10 For the present invention Figure 9 Enlarged schematic diagram of part A;

[0025] Figure 11 This is a schematic diagram of the inclined panel structure of the present invention.

[0026] In the diagram: 1. Outer shell; 2. Sealing plate; 3. Surrounding airbag; 4. Analyzer body; 5. Paramagnetic oxygen sensor; 6. Inlet pipe; 7. Outlet pipe; 8. Solenoid valve II; 9. Outlet pipe; 10. Solenoid valve I; 11. Sleeve; 12. Piston rod; 13. Spring I; 14. Manifold I; 15. Manifold II; 16. Liquid storage pipe; 17. Detection pipe; 18. Spring II; 19. Piston plate; 20. Infrared ranging sensor; 21. Electric push rod; 22. Push plate I; 23. Through hole I; 24. Insert rod I; 25. Arc plate; 26. Push plate II; 27. Through hole II; 28. Insert rod II; 29. ​​Inclined block I; 30. Inclined block II; 31. Inclined panel; 32. Display screen; 33. Mounting plate; 34. Positioning hole; 35. Connecting air hole I; 36. Connecting air hole II. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and 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. Therefore, they should not be construed as limitations on this invention.

[0029] Reference Figures 1-11 An online paramagnetic oxygen analyzer includes a housing 1, with sealing plates 2 fixedly installed at both the front and rear ends of the housing 1. Both sealing plates 2 are made of transparent plastic, which allows the inner cavity of the housing 1 to form a sealed space. Four mounting plates 33 are fixedly installed on the side wall of the housing 1, and each mounting plate 33 has a positioning hole 34 on its side wall. The device is fixedly installed in a designated position by means of the mounting plates 33 and positioning holes 34 on the side wall of the housing 1. A surrounding airbag 3 is provided in the inner cavity of the housing 1. The inner side of the surrounding airbag 3 is connected to the analyzer body 4. A display screen 32 is fixedly installed at the front end of the analyzer body 4, and the operator can check the operating status of the analyzer body 4 by means of the display screen 32. A connecting air hole 35 is opened at both the upper and lower ends of the inner side of the surrounding airbag 3, and a connecting air hole 36 is opened at both the upper and lower ends of the analyzer body 4.

[0030] Furthermore, a paramagnetic oxygen sensor 5 is fixedly installed inside the paramagnetic oxygen analyzer. The input end of the paramagnetic oxygen sensor 5 is connected to an air inlet pipe 6, and the output end of the paramagnetic oxygen sensor 5 is connected to an air delivery pipe 7. The end of the air delivery pipe 7 furthest from the paramagnetic oxygen sensor 5 is connected to the surrounding airbag 3. A solenoid valve 2 8 is fixedly installed on the wall of the air delivery pipe 7. An air outlet pipe 9 is connected to the side wall of the surrounding airbag 3 and extends to the outside of the outer casing 1. A solenoid valve 10 is fixedly installed on the wall of the air outlet pipe 9. Several sleeves 11 are welded to both the upper and lower ends of the outer casing 1. A piston rod 12 is slidably installed inside each sleeve 11. A spring 13 is connected to the top of each piston rod 12, and each spring 13 is furthest from the corresponding piston rod 12. One side is connected to the inner wall of the corresponding sleeve 11. The top of the sleeves at the top of the outer shell 1 is connected to a manifold 14, and the bottom of the sleeves at the bottom of the outer shell 1 is connected to a manifold 15. A liquid storage tube 16 is connected between the manifold 14 and the manifold 15, and the side of the liquid storage tube 16 closest to the outer shell 1 is fixedly installed on the side wall of the outer shell 1. The top of the liquid storage tube 16 is connected to a detection tube 17. The top of the inner cavity of the detection tube 17 is connected to a spring 18, and the bottom of the spring 18 is connected to a piston plate 19. An infrared ranging sensor 20 is fixedly installed on the top of the detection tube 17, and the detection end of the infrared ranging sensor 20 extends to the top of the inner cavity of the detection tube 17. During a single detection, the solenoid valve 10 is operated by an external controller. The system closes, and then continues to introduce gas into the inlet pipe 6. The gas passes sequentially through the paramagnetic oxygen sensor 5 and the gas delivery pipe 7 into the surrounding airbag 3. Because the solenoid valve 10 is closed, the introduced gas cannot be discharged through the outlet pipe 9, causing the air pressure inside the surrounding airbag 3 to increase, which in turn causes the surrounding airbag 3 to inflate. The inflated airbag pushes the piston rod 12 into the inner cavity of the sleeve. The moving piston rod 12 pushes the colored liquid in the inner cavity of the sleeve into the manifold 14 and manifold 25. The squeezed-out colored liquid then enters the storage pipe 16 and the detection pipe 17 through the manifold 14 and manifold 25. As the amount of colored liquid in the detection pipe 17 increases, the colored liquid pushes the piston rod 16 into the storage pipe 16 and the detection pipe 17. As the piston plate 19 moves upward, the infrared ranging sensor 20 can monitor the distance the piston plate 19 rises in real time. When the piston plate 19 rises to the designated position, it proves that no gas has escaped to the outside of the surrounding airbag 3, thus proving that there is no air leakage at the connection between the analyzer body 4 connected to the surrounding airbag 3 and the input and output ends of the paramagnetic oxygen sensor 5. However, since the housing of the paramagnetic oxygen sensor 5 is located inside the analyzer body 4, whether or not it leaks will not affect the expansion of the surrounding airbag 3. Therefore, a secondary test is required on the housing of the paramagnetic oxygen sensor 5. During the secondary test, the solenoid valve 28 is closed by the external controller, and then gas is introduced through the air inlet pipe 6. The gas enters the housing of the paramagnetic oxygen sensor 5.If the position of piston plate 19 does not change, it proves that the gas inside the housing of paramagnetic oxygen sensor 5 has not escaped into the surrounding airbag 3, and the surrounding airbag 3 has not expanded, thus proving that the housing of paramagnetic oxygen sensor 5 is not leaking. If the position of piston plate 19 moves upward, it proves that the gas inside the housing of paramagnetic oxygen sensor 5 has escaped into the surrounding airbag 3, causing the surrounding airbag 3 to expand, thus proving that the paramagnetic oxygen sensor 5 is leaking.

[0031] Furthermore, an electric push rod 21 is fixedly installed on the side wall of the liquid storage tube 16. A push plate 22 is fixedly installed on the telescopic end of the electric push rod 21. A through hole 23 is opened on the side wall of the push plate 22. An insert rod 24 is welded to the side wall of the inner cavity of the liquid storage tube 16. An arc-shaped plate 25 is welded to the side wall of the push plate 22. A push plate 26 is welded to the side of the arc-shaped plate 25 away from the push plate 22. A through hole 27 is opened on the side wall of the push plate 26. An insert rod 28 is welded to the side wall of the inner cavity of the liquid storage tube 16. When the electric push rod 21 operates, it pushes the push plate 22 to move to the right. Because the push plate 22 moves to the right through the arc... The forming plate 25 is welded to the push plate 26, so that the push plate 26 and the push plate 22 move synchronously. During the movement of the push plate 26 to the right, the inserted rod 28 blocks the through hole 27, so that the push plate 26, which moves to the right, pushes the colored liquid on the right side of the inner cavity of the liquid storage tube 16 through the manifold 14 into the inner cavity of the sleeve at the top of the surrounding airbag 3. This causes the corresponding piston rod 12 to press down on the surrounding airbag 3, causing the gas in the inner cavity of the surrounding airbag 3 to flow. Since the surrounding airbag 3 is connected to the analyzer body 4, the flowing gas can reduce the time required for preheating, thereby improving the preheating efficiency.

[0032] Furthermore, inclined blocks 29 and 30 are welded to the sides of push plate 22 and push plate 26 respectively, and inclined plate 31 is welded to the bottom of piston plate 19. Then, inclined block 29 on the side wall of push plate 22 abuts against inclined plate 31. As push plate 22 moves to the right, inclined block 29 pushes inclined plate 31 downward. Inclined plate 31 drives piston plate 19 downward. Piston plate 19 pushes the colored liquid in storage tube 16 and detection tube 17 into manifold 15, so that piston rods 12 on both the upper and lower sides squeeze the surrounding airbag 3 at the same time, thereby increasing the air pressure inside the surrounding airbag 3. In this process, mechanical energy is converted into the internal energy of the gas. The increase in internal energy is manifested as an increase in gas temperature. This further improves the preheating efficiency.

[0033] Working principle: When in use, the device is fixedly installed in the designated position with the help of the mounting plate 33 and positioning hole 34 on the side wall of the outer shell 1; before use, dry gas is introduced through the air inlet pipe 6, and then the dry gas passes through the paramagnetic oxygen sensor 5, the air supply pipe 7 and the surrounding air bag 3 in sequence, and finally the dry gas is discharged through the air outlet pipe 9. The introduced dry gas is used to clean the moisture and residual gas that may exist inside the paramagnetic oxygen sensor 5.

[0034] During a test, the solenoid valve 10 is closed by an external controller, and gas continues to flow into the intake pipe 6. The gas passes through the paramagnetic oxygen sensor 5 and the gas delivery pipe 7 into the surrounding airbag 3. Because the solenoid valve 10 is closed, the gas cannot be discharged through the exhaust pipe 9, causing the air pressure inside the surrounding airbag 3 to increase, thus inflating the surrounding airbag 3. The inflated airbag pushes the piston rod 12 into the inner cavity of the sleeve. The moving piston rod 12 pushes the colored liquid in the inner cavity of the sleeve into the manifold 14 and manifold 25. The squeezed-out colored liquid then flows through manifold 14 and manifold 25 into the storage pipe 16 and the detection pipe 17. As the amount of colored liquid in the detection pipe 17 increases, the colored liquid pushes the piston plate 19 upward. The infrared ranging sensor 20 can monitor the distance the piston plate 19 rises in real time. When the piston plate 19 rises to the designated position, it proves that no gas has escaped into the surrounding airbag. The airbag 3 is inspected externally, which proves that there is no air leakage at the connection points between the analyzer body 4, which is connected to the surrounding airbag 3, and the input and output terminals of the paramagnetic oxygen sensor 5. However, since the housing of the paramagnetic oxygen sensor 5 is located inside the analyzer body 4, whether it leaks or not will not affect the expansion of the surrounding airbag 3. Therefore, a secondary inspection of the housing of the paramagnetic oxygen sensor 5 is required. During the secondary inspection, the solenoid valve 8 is closed by the external controller, and then gas is introduced through the air inlet pipe 6. The gas enters the housing of the paramagnetic oxygen sensor 5. If the position of the piston plate 19 does not change, it proves that the gas inside the housing of the paramagnetic oxygen sensor 5 has not escaped into the surrounding airbag 3, and the surrounding airbag 3 has not expanded, thus proving that the housing of the paramagnetic oxygen sensor 5 is not leaking. If the position of the piston plate 19 moves upward, it proves that the gas inside the housing of the paramagnetic oxygen sensor 5 has escaped into the surrounding airbag 3, causing the surrounding airbag 3 to expand, thus proving that the paramagnetic oxygen sensor 5 is leaking.

[0035] If, during the first test, the piston plate 19 remains stationary and the air pressure inside and outside the air bladder 3 is consistent, it indicates that there may be air leakage in the analyzer body 4, the housing of the paramagnetic oxygen sensor 5, and the connection point of the paramagnetic oxygen sensor 5. In this case, a second test is performed for the second scenario. During the second test for the second scenario, the solenoid valve 8 is closed by the external controller, and then gas is introduced through the air inlet pipe 6, entering the interior of the paramagnetic oxygen sensor 5 housing. If the piston plate 19 moves upward, it indicates that only the paramagnetic oxygen sensor 5 housing is leaking, because the gas escaping from the paramagnetic oxygen sensor 5 housing will enter the air bladder 3, causing the air bladder 3 to expand, which in turn causes the piston plate 19 to move upward. If the piston plate 19 moves upward, it indicates that there is a leak only at the connection of the paramagnetic oxygen sensor 5. This is because the gas escaping from the connection of the paramagnetic oxygen sensor 5 will increase the air pressure inside the outer shell 1, thereby squeezing the surrounding airbag 3, causing the surrounding airbag 3 to contract and causing the piston plate 19 to move downward. If the piston plate 19 remains stationary, it indicates that there may be a leak in the analyzer body 4, the shell of the paramagnetic oxygen sensor 5, and the connection of the paramagnetic oxygen sensor 5. The staff can use the values ​​of the first and second detections monitored by the infrared ranging sensor 20 to specifically determine which part of the main body of the device is leaking, thereby reducing the workload of maintenance personnel and improving maintenance efficiency.

[0036] If there is no air leakage in this device, the operator can preheat the device by turning on the heating element inside the analyzer body 4. Simultaneously, the electric push rod 21 operates, pushing push plate 22 to the right. Since push plate 22 is welded to push plate 26 via arc plate 25, push plate 26 and push plate 22 move synchronously. During the rightward movement of push plate 26, the insertion rod 28 blocks the through hole 27, allowing the subsequently moving push plate 26 to push the colored liquid on the right side of the reservoir tube 16 through the manifold 14 into the sleeve cavity at the top of the surrounding airbag 3. This causes the corresponding piston rod 12 to press downwards against the surrounding airbag 3, releasing gas from the cavity inside the surrounding airbag 3. The gas flows, and because the surrounding airbag 3 is connected to the analyzer body 4, the flowing gas can reduce the preheating time and thus improve the preheating efficiency. Subsequently, the inclined block 29 on the side wall of the push plate 22 abuts against the inclined panel 31. As the push plate 22 moves to the right, the inclined block 29 pushes the inclined panel 31 down, and the inclined panel 31 drives the piston plate 19 down. The piston plate 19 pushes the colored liquid in the storage tube 16 and the detection tube 17 into the manifold 15, so that the piston rods 12 on both the upper and lower sides squeeze the surrounding airbag 3 at the same time, thereby increasing the gas pressure inside the surrounding airbag 3. In this process, mechanical energy is converted into the internal energy of the gas. The increase in internal energy is manifested as an increase in gas temperature. This cycle repeats, which further improves the preheating efficiency.

[0037] To further clarify, the aforementioned fixed connection should be interpreted broadly unless otherwise explicitly specified and limited. For example, it may be welding, gluing, or integral molding, or other conventional methods well known to those skilled in the art.

[0038] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An online paramagnetic oxygen analyzer, comprising a housing (1), characterized in that: Sealing plates (2) are fixedly installed at both the front and rear ends of the outer shell (1). A surrounding airbag (3) is provided in the inner cavity of the outer shell (1). The analyzer body (4) is connected to the inner side of the surrounding airbag (3). A paramagnetic oxygen sensor (5) is fixedly installed in the inner cavity of the paramagnetic oxygen analyzer. An air inlet pipe (6) is connected to the input end of the paramagnetic oxygen sensor (5). An air delivery pipe (7) is connected to the output end of the paramagnetic oxygen sensor (5), and the air delivery pipe (7) is far away from the paramagnetic oxygen sensor (5). One end of the air supply pipe (7) is connected to the surrounding airbag (3). A solenoid valve (8) is fixedly installed on the wall of the air supply pipe (7). An air outlet pipe (9) is connected to the side wall of the surrounding airbag (3) and extends to the outside of the outer shell (1). A solenoid valve (10) is fixedly installed on the wall of the air outlet pipe (9). Several sleeves (11) are welded to both the upper and lower ends of the outer shell (1). A piston rod (12) is slidably arranged in the inner cavity of several sleeves (11). Each piston rod (12) is connected to a spring (13) at its top, and the side of each spring (13) away from the corresponding piston rod (12) is connected to the inner wall of the corresponding sleeve (11). A manifold (14) is connected between the tops of the sleeves at the top of the outer shell (1), and a manifold (15) is connected between the bottoms of the sleeves at the bottom of the outer shell (1). A liquid storage tube (16) is connected between the manifold (14) and the manifold (15). The liquid storage tube (16) is fixedly installed on the side wall of the outer shell (1) on the side of the outer shell (1). The top of the liquid storage tube (16) is connected to the detection tube (17). The top of the inner cavity of the detection tube (17) is connected to the second spring (18). The bottom of the second spring (18) is connected to the piston plate (19). The top of the detection tube (17) is fixedly installed with an infrared ranging sensor (20), and the detection end of the infrared ranging sensor (20) extends to the top of the inner cavity of the detection tube (17).

2. The online paramagnetic oxygen analyzer according to claim 1, characterized in that: An electric push rod (21) is fixedly installed on the side wall of the liquid storage tube (16). A push plate (22) is fixedly installed on the telescopic end of the electric push rod (21). A through hole (23) is opened on the side wall of the push plate (22). An insert rod (24) is welded on the side wall of the inner cavity of the liquid storage tube (16). An arc plate (25) is welded on the side wall of the push plate (22). A push plate (26) is welded on the side of the arc plate (25) away from the push plate (22). A through hole (27) is opened on the side wall of the push plate (26). An insert rod (28) is welded on the side wall of the inner cavity of the liquid storage tube (16).

3. The online paramagnetic oxygen analyzer according to claim 2, characterized in that: The push plate 1 (22) and push plate 2 (26) are respectively welded to the side of each other with inclined block 1 (29) and inclined block 2 (30), and the bottom of the piston plate (19) is welded with inclined plate (31).

4. The online paramagnetic oxygen analyzer according to claim 1, characterized in that: Both of the sealing plates (2) are made of transparent plastic.

5. The online paramagnetic oxygen analyzer according to claim 1, characterized in that: The analyzer body (4) has a display screen (32) fixedly installed at the front end.

6. The online paramagnetic oxygen analyzer according to claim 1, characterized in that: Four mounting plates (33) are fixedly installed on the side wall of the outer shell (1), and each mounting plate (33) has a positioning hole (34) on its side wall.

7. The online paramagnetic oxygen analyzer according to claim 1, characterized in that: The inner sides of the surrounding airbag (3) are provided with a connecting air hole 1 (35) at both the top and bottom, and the upper and lower sides of the analyzer body (4) are provided with a connecting air hole 2 (36).

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