Sealing structure of high-temperature and high-pressure gas sample cell

Abstract

The utility model relates to the technical field of gas analysis, in particular to a high-temperature and high-pressure gas sample cell sealing structure. The gas chamber comprises a gas chamber, a branch pipe and a sealing assembly, the branch pipe is welded to the side face of the gas chamber, and the sealing assembly is arranged at the end, away from the gas chamber, of the branch pipe. The sleeve is arranged on the branch pipe in a sleeving manner; one end of the pressing ring is sleeved with a flange piece to be connected with the sleeve, the other end of the pressing ring is provided with an air pipe connector externally connected with a pipeline, and a groove is formed in the end, facing the sleeve, of the pressing ring; the sealing ring is contained in the groove and abuts against the flange piece when the pressing ring is connected with the sleeve. Wherein the air chamber, the branch pipe and the flange piece are made of quartz materials, the sleeve and the pressing ring are made of stainless steel materials, and the sealing ring is made of composite graphite materials. The sealing performance of the gas sample cell can be maintained in a high-temperature and high-pressure environment, so that the stability and the accuracy of gas measurement are ensured.

Description

Technical Field

[0001] The present application relates to the technical field of gas analysis, and in particular to a sealing structure of a high-temperature and high-pressure gas sample cell. Background Art

[0002] A large amount of gas is produced in industrial processes such as oil refining and waste incineration. The gas produced under certain special working conditions has the characteristics of high temperature and high pressure. By monitoring the gas composition, the process can be optimized and controlled, which can not only improve the safety of the industrial control process, but also improve energy utilization efficiency.

[0003] In the laboratory, a gas sample pool is often used to simulate industrial conditions, and a laser gas analyzer is installed at both ends of the gas sample pool for analysis. The existing gas sample pool includes a main gas chamber and a gas branch pipe. The gas branch pipe is connected to the pipeline to form a gas circuit. The connection is simply sealed by a resin O-ring, which can be well adapted to spectral technology under normal temperature and pressure conditions. However, when under high temperature and high pressure conditions, the resin O-ring and the plastic pipe will be deformed due to excessive temperature, affecting the stability of the gas pressure inside the gas pool, thereby affecting the stability and accuracy of the laser gas analyzer measurement. Utility Model Content

[0004] In order to overcome at least some of the defects and shortcomings in the prior art, the present application provides a high-temperature and high-pressure gas sample cell sealing structure, which can maintain the sealing of the gas sample cell in a high-temperature and high-pressure environment to ensure the stability and accuracy of gas measurement.

[0005] Specifically, an embodiment of the present invention provides a high-temperature and high-pressure gas sample cell sealing structure, which adopts the following technical solution:

[0006] A high-temperature and high-pressure gas sample pool sealing structure, comprising: an air chamber, a branch pipe and a sealing component, wherein the branch pipe is welded to the side of the air chamber, and the sealing component is arranged at the end of the branch pipe away from the air chamber, and comprises: a flange, which is welded to the end of the branch pipe away from the air chamber; a sleeve, which is sleeved on the branch pipe; a pressure ring, one end of which is sleeved with the flange to connect the sleeve, and the other end is provided with an air pipe interface for an external pipeline, wherein the pressure ring is provided with a groove at one end facing the sleeve; a sealing ring, which is accommodated in the groove and abuts against the flange when the pressure ring is connected to the sleeve; wherein the air chamber, the branch pipe and the flange are made of quartz material, the sleeve and the pressure ring are made of stainless steel, and the sealing ring is made of composite graphite material.

[0007] By adopting the above-mentioned technical scheme, a flange is set on one end of the pressure ring to connect the sleeve, and the sealing ring is accommodated in the groove of the pressure ring. When the pressure ring is connected to the sleeve, the sealing ring can abut the flange, and the branch pipe is welded to the air chamber, and the flange is welded to the branch pipe, which can further increase the sealing performance of the sealing assembly; in addition, the air chamber, branch pipe, and flange are set to quartz material, the sleeve and the pressure ring are set to stainless steel material, and the sealing ring is set to composite graphite material, so that the overall structure can adapt to high temperature and high pressure gas environment, so as to avoid deformation of a certain part of the structure under high temperature conditions, affecting the stability of the internal air pressure of the gas pool, so that the present application can maintain the sealing performance of the gas sample pool, and ensure the stability and accuracy of gas measurement.

[0008] Optionally, a high-temperature and high-pressure gas sample cell sealing structure further includes: a window piece fused to both ends of the gas chamber, wherein the window piece is made of quartz material.

[0009] By adopting the above technical solution, by arranging window pieces at both ends of the gas chamber, and the window pieces are made of quartz material, the window pieces can have good light transmittance to reduce the laser loss of the laser gas analyzer when measuring gas. At the same time, the quartz material can adapt to high temperature and high pressure environment to ensure the stability of the structure; in addition, the window piece is welded to the gas chamber to further ensure the sealing of the gas chamber.

[0010] Optionally, the angle between the window piece and the air chamber is 85°.

[0011] By adopting the above technical solution, the window piece and the air chamber are welded at an angle, which can reduce the optical interference noise generated by the optical surface of the window piece.

[0012] Optionally, the window piece is a wedge-shaped structure.

[0013] By adopting the above technical solution, setting the window piece itself as a wedge-shaped structure, and coordinating the window piece and the air chamber to be obliquely welded, the optical interference noise generated by the optical surface of the window piece itself can be effectively reduced.

[0014] Optionally, the wedge angle of the window piece is 0.5°.

[0015] By adopting the above technical solution, setting the wedge angle of the window piece to 0.5°, and coordinating the window piece and the air chamber to be obliquely welded, and setting the window piece itself to a wedge-shaped structure, the optical interference noise generated by the optical surface of the window piece itself can be greatly reduced.

[0016] Optionally, an internal thread is provided on the inner side of the sleeve, and an external thread is provided on the outer side of the pressure ring, and the sleeve and the pressure ring are fixedly connected via the internal thread and the external thread, wherein the groove is located on the inner side of the external thread.

[0017] By adopting the above technical solution and arranging matching internal and external threads on the inner side of the sleeve and the outer side of the pressing ring, the assembly and disassembly of the sleeve and the pressing ring can be facilitated.

[0018] Optionally, the air pipe interface is a ferrule-type interface.

[0019] By adopting the above technical solution and setting the air pipe interface as a ferrule-type interface, the ferrule assembly of the external pipeline can be facilitated to form an air circuit.

[0020] Optionally, the number of branch pipes is two, and the number of corresponding sealing assemblies is two.

[0021] By adopting the above technical solution, two branch pipes are provided, and the two branch pipes can be respectively connected to external pipelines through the air pipe interface to increase the gas transmission efficiency.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. By setting a flange piece at one end of the pressure ring to connect the sleeve, and the sealing ring is accommodated in the groove of the pressure ring, when the pressure ring is connected to the sleeve, the sealing ring can abut the flange piece, and the branch pipe is welded to the air chamber, and the flange piece is welded to the branch pipe, which can further increase the sealing performance of the sealing assembly; in addition, the air chamber, the branch pipe, and the flange piece are set to quartz material, the sleeve and the pressure ring are set to stainless steel material, and the sealing ring is set to composite graphite material, so that the overall structure can adapt to the high temperature and high pressure gas environment, so as to avoid deformation of a certain part of the structure under high temperature conditions, affecting the stability of the internal air pressure of the gas pool, so that the present application can maintain the sealing performance of the gas sample pool, and ensure the stability and accuracy of gas measurement;

[0024] 2. By setting windows at both ends of the gas chamber, and the windows are made of quartz, the windows can have good light transmittance to reduce the laser loss of the laser gas analyzer when measuring gas. At the same time, the quartz material can adapt to high temperature and high pressure environment to ensure the stability of the structure; in addition, the window is welded to the gas chamber to further ensure the sealing of the gas chamber;

[0025] 3. Setting the wedge angle of the window to 0.5°, and coordinating the window and the air chamber to be welded at an angle, and setting the window itself to a wedge-shaped structure, can greatly reduce the optical interference noise generated by the optical surface of the window itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the gas chamber and branch pipe structure of a high-temperature and high-pressure gas sample cell sealing structure disclosed in an embodiment of the present application.

[0027] Figure 2 for Figure 1A schematic diagram of a partial sealing structure of a branch pipe and a sealing assembly of a high-temperature and high-pressure gas sample cell sealing structure is shown;

[0028] Figure 3 for Figure 1 A schematic diagram of a sealing structure of a sealing assembly of a high-temperature and high-pressure gas sample cell sealing structure is shown;

[0029] Figure 4 for Figure 1 A schematic diagram of the sealing structure of a sealing component of a high-temperature and high-pressure gas sample cell sealing structure is shown.

[0030] Description of reference numerals:

[0031] 10. Air chamber; 20. Branch pipe; 30. Sealing assembly; 31. Flange; 32. Sleeve; 321. Internal thread; 33. Pressing ring; 331. Air pipe interface; 332. Groove; 333. External thread; 34. Sealing ring; 40. Window piece. DETAILED DESCRIPTION

[0032] The terms used in the following embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to be used as limitations to the present application. As used in the specification and appended claims of the present application, the singular expressions "one", "a kind of", "above", "the" and "this" are intended to also include plural expressions, unless there is a clear indication to the contrary in the context. It should also be understood that the term "and / or" used in the present application refers to and includes any or all possible combinations of one or more listed items.

[0033] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features, and in the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more.

[0034] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0035] See also Figure 1 , Figure 2 and Figure 3 The embodiment of the present application discloses a high-temperature and high-pressure gas sample pool sealing structure, including: a gas chamber 10, a branch pipe 20 and a sealing assembly 30. The branch pipe 20 is welded to the side of the gas chamber 10. The sealing assembly 30 is arranged at one end of the branch pipe 20 away from the gas chamber 10, and is used to seal the gas in the gas chamber 10 to ensure the stability and accuracy of gas measurement.

[0036] Among them, the sealing assembly 30 includes: a flange 31, a sleeve 32, and a sealing ring 34. The flange 31 is welded to the end of the branch pipe 20 away from the air chamber 10, and the sleeve 32 is sleeved on the branch pipe 20. One end of the pressure ring 33 is sleeved with the flange 31 for connecting and fixing the sleeve 32, and the other end is provided with an air pipe interface 331 of an external pipeline, wherein a groove 332 for accommodating the sealing ring 34 is also provided at the end of the pressure ring 33 facing the sleeve 32, so that the flange 31 can be abutted when the pressure ring 33 is connected to the sleeve 32, which can further increase the sealing performance of the sealing assembly 30, and cooperate with the branch pipe 20 to weld the air chamber 10, and the flange 31 to weld the branch pipe 20, which can ensure the sealing performance of the overall structure of the gas sample pool.

[0037] It is worth mentioning here that the gas chamber 10, the branch pipe 20, and the flange 31 are all made of quartz material, the sleeve 32, the pressure ring 33 and the air pipe interface 331 are all made of stainless steel, and the sealing ring 34 is made of composite graphite material, so that the overall structure of the gas sample pool can adapt to the high temperature and high pressure gas environment to avoid deformation of a certain part of the structure, which affects the stability of the internal air pressure of the gas pool, thereby enabling the present embodiment to maintain the sealing of the gas sample pool and ensure the stability and accuracy of gas measurement.

[0038] See also Figure 4 In order to facilitate the assembly and disassembly of the sleeve 32 and the pressure ring 33, an internal thread 321 is provided on the inner side of the sleeve 32, and an external thread 333 is provided on the outer side of the pressure ring 33. The sleeve 32 and the pressure ring 33 are screwed together through the internal thread 321 and the external thread 333, wherein the groove 332 is located on the inner side of the external thread 333. The air pipe interface 331 is set as a ferrule interface, which can facilitate the ferrule assembly of the external pipe to form an air circuit. It is worth noting that Figure 1 As shown, two branch pipes 20 are provided, and two sealing assemblies 30 are also provided accordingly. The two branch pipes 20 can be respectively connected to external pipelines through the air pipe interface 331 to increase the gas transmission efficiency.

[0039] See also Figure 1 Window pieces 40 are welded on both ends of the gas chamber 10, and the window pieces 40 are made of quartz material.

[0040] Among them, the quartz material can make the window piece 40 have good light transmittance to reduce the laser loss of the laser gas analyzer when measuring gas. At the same time, the quartz material can adapt to high temperature and high pressure environment to ensure the stability of the structure; in addition, the window piece 40 is welded to the gas chamber 10 to further ensure the sealing of the gas chamber 10.

[0041] Specifically, the angle between the window piece 40 and the air chamber 10 is 85°, that is, the window piece 40 and the air chamber 10 are welded at an angle, thereby reducing the optical interference noise generated by the optical surface of the window piece 40 .

[0042] Furthermore, in this embodiment, the window piece 40 is also configured as a wedge-shaped structure.

[0043] The wedge-shaped structure can be understood as an inverted triangle shape that is wide at the top and narrow at the bottom, and the window piece 40 is welded obliquely with the air chamber 10 , which can effectively reduce the optical interference noise generated by the optical surface of the window piece 40 .

[0044] Specifically, the wedge angle of the window piece 40 is set to 0.5°, which, combined with the oblique welding of the window piece 40 and the air chamber 10 and the wedge-shaped structure of the window piece 40 itself, can greatly reduce the optical interference noise generated by the optical surface of the window piece 40 itself.

[0045] In summary, a high-temperature and high-pressure gas sample pool sealing structure disclosed in an embodiment of the present application is provided, by setting a flange part 31 at one end of a pressure ring 33 to be sleeved to connect the sleeve 32, and a sealing ring 34 is accommodated in a groove 332 of the pressure ring 33, so that when the pressure ring 33 is connected to the sleeve 32, the sealing ring 34 can abut against the flange part 31, and the branch pipe 20 is welded to the gas chamber 10, and the flange part 31 is welded to the branch pipe 20, which can further increase the sealing performance of the sealing assembly 30; in addition, the gas chamber 10, the branch pipe 20, and the flange part 31 are set to quartz material, the sleeve 32 and the pressure ring 33 are set to stainless steel material, and the sealing ring 34 is set to composite graphite material, so that the overall structure can adapt to the high-temperature and high-pressure gas environment to avoid a certain part of the structure from developing under high temperature conditions. Deformation occurs, thereby enabling the present application to maintain the sealing of the gas sample pool and ensure the stability and accuracy of gas measurement; by arranging window pieces 40 at both ends of the gas chamber 10, and the window piece 40 is made of quartz material, the window piece 40 can have good light transmittance to reduce the laser loss of the laser gas analyzer when measuring gas, and the quartz material can adapt to high temperature and high pressure environment to ensure the stability of the structure; in addition, the window piece 40 is welded to the gas chamber 10, which can further ensure the sealing of the gas chamber 10; the wedge angle of the window piece 40 is set to 0.5°, and the window piece 40 and the gas chamber 10 are obliquely welded, and the window piece 40 itself is set to a wedge-shaped structure, which can greatly reduce the optical interference noise generated by the optical surface of the window piece 40 itself.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high temperature and high pressure gas sample cell sealing structure, characterized in that: include: An air chamber (10), a branch pipe (20) and a sealing assembly (30), wherein the branch pipe (20) is welded to a side surface of the air chamber (10), and the sealing assembly (30) is arranged at an end of the branch pipe (20) away from the air chamber (10), and comprises: A flange (31) welded to an end of the branch pipe (20) away from the air chamber (10); A sleeve (32) sleeved on the branch pipe (20); A pressure ring (33), one end of which is sleeved with the flange (31) and connected to the sleeve (32), and the other end of which is provided with an air pipe interface (331) for connecting to an external pipeline, wherein a groove (332) is provided at one end of the pressure ring (33) facing the sleeve (32); A sealing ring (34) is accommodated in the groove (332) and abuts against the flange member (31) when the pressure ring (33) is connected to the sleeve (32); The air chamber (10), the branch pipe (20), and the flange (31) are made of quartz material, the sleeve (32) and the pressure ring (33) are made of stainless steel, and the sealing ring (34) is made of composite graphite material.

2. A high temperature and high pressure gas sample cell sealing structure according to claim 1, characterized in that: Also includes: A window piece (40) is welded to two ends of the gas chamber (10), wherein the window piece (40) is made of quartz.

3. A high temperature and high pressure gas sample cell sealing structure according to claim 2, characterized in that: The included angle between the window and the air chamber (10) is 85°.

4. A high temperature and high pressure gas sample cell sealing structure according to claim 3, characterized in that: The window piece (40) is a wedge-shaped structure.

5. The sealing structure of a high-temperature and high-pressure gas sample cell according to claim 4, characterized in that: The wedge angle of the window piece (40) is 0.5°.

6. The high-temperature and high-pressure gas sample cell sealing structure according to claim 1, characterized in that: An internal thread (321) is provided on the inner side of the sleeve (32), and an external thread (333) is provided on the outer side of the pressure ring (33); the sleeve (32) and the pressure ring (33) are fixedly connected via the internal thread (321) and the external thread (333), wherein the groove (332) is located on the inner side of the external thread (333).

7. The sealing structure of a high-temperature and high-pressure gas sample cell according to claim 1, characterized in that: The air pipe interface (331) is a ferrule-type interface.

8. A high-temperature and high-pressure gas sample cell sealing structure according to claim 7, characterized in that: There are two branch pipes (20), and there are two corresponding sealing assemblies (30).

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