Pipeline gas sampling auxiliary device

Abstract

The utility model discloses a pipeline gas sampling auxiliary device which comprises a switching flange plate capable of being detachably connected with a sampling opening and an elastic guide pipe capable of being inserted into the pipeline sampling opening, and a sampling hole is coaxially formed in the middle of the switching flange plate in a penetrating mode; the elastic guide pipe is inserted into the sampling hole, the outer wall of the elastic guide pipe and the inner wall of the sampling hole are attached and fixed in the circumferential direction to form circumferential closed connection, and a sampling cavity capable of containing a sampling pipe is formed in the elastic guide pipe; and the inner wall of the sampling cavity is tightly attached to the outer wall of the sampling tube to form circumferential closed adaptation. According to the pipeline gas sampling auxiliary device, circulation contact between gas inside a pipeline and external air can be reduced in the sampling process of the pipeline gas, the sampling process is prevented from being interfered by the external air, potential safety hazards in the sampling process are reduced, and therefore the sampling result of the pipeline gas is more accurate and reliable, and the sampling process is safer.

Description

Technical Field

[0001] This utility model relates to the technical field of pipeline gas sampling equipment, and in particular to a pipeline gas sampling auxiliary device. Background Technology

[0002] In the daily operations of some industrial and mining enterprises and production units, it is often necessary to use sampling equipment such as sampling guns to detect the gas transported through pipelines, in order to determine parameters such as gas pressure and flow rate in the pipeline, and thereby determine the current transport status of the gas in the pipeline, so as to match or adjust the corresponding working conditions or equipment operating status.

[0003] Taking the semiconductor industry as an example, in the current daily production process of the semiconductor industry, it is usually necessary to detect the exhaust gas transported in its equipment pipelines.

[0004] Specifically, the common process for detecting exhaust gas transported in pipelines in the semiconductor industry is to first open the flange sealed at the sampling port on the exhaust gas emission pipeline, then insert the sampling tube of the sampling gun into the sampling port to sample the gas in the pipeline and obtain relevant parameters of exhaust gas transport in the pipeline, such as flow rate; after the relevant on-site testing is completed and the gas sample in the pipeline is collected, the gas sample is sent to the laboratory for relevant testing.

[0005] In the existing gas sampling operation described above, after the sampling tube is inserted into the sampling port, there is still a large space between the outer periphery of the sampling tube and the inner edge of the sampling port. Since there is positive or negative pressure in a typical gas delivery pipeline, this will cause the gas space inside the pipeline to interfere with the gas environment outside the pipeline.

[0006] For example, if the inside of the pipeline is a negative pressure gas transport environment, during the sampling process, air from the external atmosphere will enter the pipeline through the space between the sampling tube and the edge of the sampling port, thus interfering with the gas environment inside the pipeline. This will directly affect the accuracy of the gas detection data inside the pipeline and the purity of the gas sample collected by the sampling tube, adversely affecting the subsequent related detection results.

[0007] If the pipeline is under positive pressure, gas can escape through the space between the sampling tube and the sampling port edge during sampling. This can lead to inaccurate gas detection data and sample collection results. This is particularly problematic for many semiconductor companies that use flammable and explosive gases like hydrogen as carrier gases during production. After filtering out impurities using production equipment, the waste gas, primarily composed of the carrier gas, is discharged. In such cases, sampling the waste gas from the discharge pipeline is risky. Considering the explosive limits of hydrogen (4%–75% by volume), contact between the gas inside the pipeline and the outside air can easily create an explosive atmosphere, posing a significant safety risk. Furthermore, static electricity or other ignition sources during sampling operations could cause an explosion, severely jeopardizing the stable operation of equipment and the personal safety of personnel.

[0008] In view of this, how to reduce the contact between the gas inside the pipeline and the outside air during the sampling process of pipeline gas, avoid interference from the outside air during the sampling process, and reduce the safety hazards during the sampling process, so as to make the sampling results of pipeline gas more accurate and reliable and the sampling process safer, is an important technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0009] The purpose of this invention is to provide a pipeline gas sampling auxiliary device that can reduce the flow and contact between the gas inside the pipeline and the external air during the pipeline gas sampling process, avoid interference from the external air during the sampling process, and reduce safety hazards during the sampling process, thereby making the pipeline gas sampling results more accurate and reliable, and the sampling process safer.

[0010] To solve the above-mentioned technical problems, this utility model provides a pipeline gas sampling auxiliary device, including a transition flange that can be detachably connected to the sampling port and an elastic conduit that can be inserted into the pipeline sampling port, wherein a sampling hole is coaxially passed through the middle of the transition flange.

[0011] The elastic conduit is inserted into the sampling hole, and the outer wall of the elastic conduit is circumferentially fitted and fixed to the inner wall of the sampling hole to form a circumferentially closed connection. The interior of the elastic conduit has a sampling cavity that can accommodate the sampling tube, and the inner wall of the sampling cavity is tightly fitted to the outer wall of the sampling tube to form a circumferentially closed fit.

[0012] Preferably, the front end of the elastic conduit protrudes axially from the front face of the adapter flange, and the inner diameter of the sampling chamber increases axially from front to back.

[0013] Preferably, the rear end of the elastic conduit protrudes axially from the rear plate surface of the adapter flange.

[0014] Preferably, an annular positioning boss is provided on the front disc surface along the axial direction. The annular positioning boss is coaxially aligned with the front end opening of the sampling hole, and the elastic conduit passes through the sampling hole and the annular positioning boss sequentially from back to front.

[0015] Preferably, the inner wall of the annular positioning boss is tightly fitted to the outer wall of the elastic conduit to form a circumferentially closed fit.

[0016] Preferably, the space between the annular positioning boss and the outer wall of the elastic conduit is filled with a port adhesive layer that extends circumferentially along the elastic conduit and is connected end to end, and the annular positioning boss and the elastic conduit are bonded and fixed together by the port adhesive layer.

[0017] Preferably, the outer wall of the elastic conduit and the inner wall of the sampling hole are filled with an inner adhesive layer that extends circumferentially along the elastic conduit and is connected end to end, and the elastic conduit and the sampling hole are bonded and fixed together by the inner adhesive layer.

[0018] Preferably, the adapter flange is provided with a plurality of positioning holes, the positioning holes penetrating the adapter flange along the axial direction of the adapter flange, and the positioning holes are arranged sequentially along the circumference of the adapter flange, and positioning bolts that can be adapted to the flange connection surface of the pipeline sampling port are inserted into the positioning holes.

[0019] Preferably, the elastic conduit is a rubber tube or a silicone tube.

[0020] Preferably, the elastic conduit is a corrugated pipe.

[0021] Compared to the aforementioned background technology, the pipeline gas sampling auxiliary device provided by this utility model allows for convenient operation. When sampling and testing of the gas inside the pipeline is required, the sealing flange at the pipeline sampling port can be removed. Then, the front end of the elastic conduit can be quickly inserted into the pipeline sampling port, and the adapter flange can be aligned and securely connected to the pipeline sampling port. This completes the alignment and installation of the pipeline gas sampling auxiliary device with the pipeline sampling port. Next, the sampling tube of the sampling device can be inserted into the sampling chamber from back to front until the sampling portion of the sampling tube extends from the front end of the elastic conduit and is inside the pipeline. Afterward, the corresponding gas sampling work can be performed within the pipeline. During sampling, the adapter flange can fasten and seal the main structure of the sampling port. Simultaneously, the circumferential fit between the outer wall of the elastic conduit and the inner wall of the sampling hole ensures the sealing of the space between the elastic conduit and the sampling hole. Furthermore, the tight fit between the inner wall of the sampling chamber and the outer wall of the sampling tube of the sampling device achieves the sealing of the space between the sampling chamber and the sampling tube. Therefore, after the pipeline gas sampling auxiliary device is installed on the pipeline sampling port and properly fitted with the sampling tube of the sampling device, the gas inside the pipeline can only escape through the internal conduit of the sampling tube. This ensures that the gas sample collected through the sampling tube can be smoothly and efficiently delivered into the sampling device, avoiding problems during the sampling process. The gas inside the pipeline leaks out through the sampling port and the flexible conduit, and between the sampling chamber and the sampling tube, effectively reducing the contact between the gas inside the pipeline and the outside air. This reduces the impact of the external gas environment on the gas environment inside the pipeline, thus avoiding interference from the outside air during the sampling process. This ensures the purity and sampling efficiency of the collected gas samples and makes the corresponding sampling and gas detection data more accurate and reliable. At the same time, it effectively reduces the risk of deflagration or air pollution caused by the gas inside the pipeline escaping into the outside air environment during the sampling process, significantly reducing safety hazards during the sampling operation and making the operation of pipeline gas sampling safer and smoother for the staff.

[0022] In another preferred embodiment of this utility model, the front end of the elastic conduit protrudes axially from the front face of the adapter flange, and the inner diameter of the sampling chamber increases axially from front to back. The structure of the elastic conduit's front end protruding from the adapter flange facilitates smoother and more precise insertion of the elastic conduit into the pipeline through the sampling port. Furthermore, the tapered diameter structure of the sampling chamber itself ensures that as the sampling tube of the sampling device is inserted into the sampling chamber from back to front, the inner wall of the sampling chamber gradually adheres to and is continuously pressed against the sampling tube. This effectively ensures reliable assembly between the elastic conduit and the sampling tube, and achieves a tight seal between the outer wall of the elastic conduit and the inner wall of the sampling chamber. This ensures the sealing and isolation of the space between the inner wall of the sampling chamber and the outer wall of the elastic conduit, preventing gas from escaping through the space between the inner wall of the sampling chamber and the outer wall of the elastic conduit, thereby further improving the operational safety and efficiency during pipeline gas sampling. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is an isometric view of a pipeline gas sampling auxiliary device provided in a specific embodiment of the present invention.

[0025] in:

[0026] 11-Transfer flange;

[0027] 111 - Sampling hole;

[0028] 112 - Front panel;

[0029] 113 - Circular positioning boss;

[0030] 114 - Positioning hole;

[0031] 12-Elastic catheter;

[0032] 121 - Sampling chamber;

[0033] 13-Port adhesive layer. Detailed Implementation

[0034] The core of this utility model is to provide a pipeline gas sampling auxiliary device. This pipeline gas sampling auxiliary device can reduce the flow and contact between the gas inside the pipeline and the external air during the pipeline gas sampling process, avoid interference from the external air during the sampling process, and reduce safety hazards during the sampling process, thereby making the pipeline gas sampling results more accurate and reliable, and the sampling process safer.

[0035] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] It should be noted in advance that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Furthermore, in this invention, unless otherwise explicitly specified and limited, the first feature being "on" or "below" the second feature may include direct contact between the first and second features, or contact between the first and second features not being in direct contact but through another feature between them.

[0038] In addition, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "under," and "beneath" for the first feature and the second feature include the first feature being directly below or diagonally below the second feature, or simply indicating that the first feature is at a lower horizontal level than the second feature. The terms "above," "below," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.

[0039] Please refer to Figure 1 , Figure 1 This is an isometric view of a pipeline gas sampling auxiliary device provided in a specific embodiment of the present invention.

[0040] In a specific embodiment, the pipeline gas sampling auxiliary device provided by this utility model includes a transition flange 11 that can be detachably connected to the sampling port and an elastic conduit 12 that can be inserted into the pipeline sampling port. A sampling hole 111 is coaxially passed through the middle of the transition flange 11.

[0041] The elastic conduit 12 is inserted into the sampling hole 111, and the outer wall of the elastic conduit 12 is circumferentially fitted and fixed to the inner wall of the sampling hole 111 to form a circumferentially closed connection. The interior of the elastic conduit 12 has a sampling cavity 121 that can accommodate the sampling tube, and the inner wall of the sampling cavity 121 is tightly fitted to the outer wall of the sampling tube to form a circumferentially closed fit.

[0042] In the specific operation and use of the equipment, when it is necessary to sample and detect the gas inside the pipeline, the sealing flange at the pipeline sampling port can be removed, and then the front end of the elastic conduit 12 can be quickly inserted into the pipeline sampling port. The adapter flange 11 can be aligned and fastened to the pipeline sampling port and reliably connected. In this way, the alignment and installation of the pipeline gas sampling auxiliary device and the pipeline sampling port can be completed.

[0043] Then, the sampling tube of the sampling device can be inserted into the sampling chamber 121 from back to front until the sampling part of the front end of the sampling tube extends out from the front end of the elastic conduit 12 and is inside the pipe. After that, the gas in the pipe can be sampled accordingly.

[0044] During sampling, the adapter flange 11 can fasten and seal the main structure of the sampling port. At the same time, the circumferential fit between the outer wall of the elastic conduit 12 and the inner wall of the sampling hole 111 ensures the sealing of the space between the elastic conduit 12 and the sampling hole 111. Based on this, the tight fit between the inner wall of the sampling cavity 121 and the outer wall of the sampling tube of the sampling device achieves the sealing of the mating space between the sampling cavity 121 and the sampling tube.

[0045] Therefore, after the auxiliary device for pipeline gas sampling is installed on the pipeline sampling port and properly fitted with the sampling tube of the sampling device, the gas inside the pipeline can only escape from the pipeline through the internal conduit of the sampling tube. This ensures that the gas sample collected through the sampling tube can be smoothly and efficiently delivered into the sampling device, preventing the gas inside the pipeline from leaking out through the sampling hole 111 and the elastic conduit 12, or between the sampling chamber 121 and the sampling tube during the sampling process. This effectively reduces the contact between the gas inside the pipeline and the external air, reducing the impact of the external gas environment on the gas environment inside the pipeline. This avoids interference from the external air during the sampling process, ensuring the purity and sampling efficiency of the collected gas sample, and making the corresponding sampling and gas detection data more accurate and reliable. At the same time, it effectively reduces the risk of deflagration or air pollution caused by the gas inside the pipeline escaping into the external air environment during the sampling process, significantly reducing safety hazards during the sampling operation and making the operation of the personnel during pipeline gas sampling safer and smoother.

[0046] Specifically, the front end of the flexible conduit 12 protrudes axially from the front face 112 of the adapter flange 11, and the inner diameter of the sampling chamber 121 increases axially from front to back. This protrusion of the front end of the flexible conduit 12 from the adapter flange 11 facilitates smoother and more precise insertion of the flexible conduit 12 into the pipeline through the sampling port. Furthermore, the tapered diameter structure of the sampling chamber 121 ensures that as the sampling tube of the sampling device is inserted into the sampling chamber 121 from back to front, the inner wall of the sampling chamber 121 gradually adheres to and presses against the sampling tube, effectively guaranteeing reliable assembly between the flexible conduit 12 and the sampling tube. This also ensures a tight seal between the outer wall of the flexible conduit 12 and the inner wall of the sampling chamber 121, guaranteeing the enclosure and isolation of the space between the inner wall of the sampling chamber 121 and the outer wall of the flexible conduit 12. This prevents gas from escaping through the space between the inner wall of the sampling chamber 121 and the outer wall of the flexible conduit 12, further improving operational safety and efficiency during pipeline gas sampling.

[0047] More specifically, the rear end of the elastic conduit 12 protrudes axially from the rear face of the adapter flange 11. This protrusion allows the sampling tube of the sampling device to be inserted more accurately and smoothly from back to front into the sampling chamber 121, thereby further improving the fitting accuracy between the sampling tube and the sampling chamber 121 and the ease of assembly, making the gas sampling process more convenient and efficient after applying the aforementioned pipeline gas sampling auxiliary device.

[0048] It is easy to understand that the front face 112 mentioned in this solution refers to the end face of the transition flange 11 facing the pipe sampling port along its axial direction, while the rear face refers to the end face of the transition flange 11 facing away from the pipe sampling port along its axial direction. All other descriptions of the front face 112 and rear face in this document can be understood by referring to this description, and will not be repeated here.

[0049] In addition, an annular positioning boss 113 is provided on the front disc surface 112 along the axial direction. The annular positioning boss 113 is coaxially aligned with the front end of the sampling hole 111, and the elastic guide tube 12 passes through the sampling hole 111 and the annular positioning boss 113 sequentially from back to front. When the adapter flange 11 is aligned and installed at the pipeline sampling port, the annular positioning boss 113 can form a circumferential structural protection at the junction of the elastic conduit 12 and the adapter flange 11, preventing the elastic conduit 12 from being subjected to rigid impact or bump, and preventing damage to the elastic conduit 12. On this basis, the annular positioning boss 113 can also be aligned and fitted or appropriately inserted at the edge of the pipeline sampling port, so that the annular positioning boss 113 and the pipeline sampling port form a circumferential structural fit, thereby further optimizing the structural sealing and assembly reliability of the pipeline gas sampling auxiliary device and the pipeline sampling port, and providing appropriate structural support for components such as the elastic conduit 12 and the adapter flange 11, avoiding local stress concentration of components, and making the structural stress distribution of the pipeline gas sampling auxiliary device and the corresponding pipeline sampling port more uniform.

[0050] Based on this, in practical applications, the annular positioning boss 113 is generally integrated into the main structure of the transition flange 11 by means of integral forming such as casting or stamping, or by welding. This makes the transition flange 11 and the annular positioning boss 113 form an integral integrated component, thereby greatly improving the structural strength of the fit between the annular positioning boss 113 and the main structure of the transition flange 11, improving the stress resistance of the structure at the fit between the transition flange 11 and the annular positioning boss 113 and the elastic conduit 12, optimizing the structural support effect of the transition flange 11 and the annular positioning boss 113 on the elastic conduit 12, and thus making the overall structure of the pipeline gas sampling auxiliary device more robust and reliable.

[0051] Furthermore, the inner wall of the annular positioning boss 113 is tightly fitted to the outer wall of the elastic conduit 12 to form a circumferentially closed fit. Thus, by utilizing the circumferential closure between the inner wall of the annular positioning boss 113 and the outer wall of the elastic conduit 12, combined with the circumferential closure between the inner wall of the sampling hole 111 and the outer wall of the elastic conduit 12, a secondary closed structure is formed for the outer peripheral space of the elastic conduit 12. This further prevents the flow and mixing of gas inside the pipeline with external air in the gaps or other connecting spaces between the outer peripheral side of the elastic conduit 12 and the annular positioning boss 113 and the sampling hole 111 during the sampling of gas in the pipeline. This further prevents external air from interfering with the gas sampling structure inside the pipeline, ensuring the purity of the sample after gas sampling and the accuracy of the related detection data.

[0052] Furthermore, a port adhesive layer 13 extending circumferentially along the elastic conduit 12 and connecting end to end is filled between the annular positioning boss 113 and the outer wall of the elastic conduit 12. The annular positioning boss 113 and the elastic conduit 12 are bonded and fixed together by the port adhesive layer 13. This port adhesive layer 13 not only achieves bonding and fixation between the annular positioning boss 113 and the elastic conduit 12, but also assists in the sealing structure between the inner wall of the annular positioning boss 113 and the outer wall of the elastic conduit 12. Thus, a sealed adhesive layer is formed at the mating point between the outer port of the annular positioning boss 113 and the outer wall of the elastic conduit 12. Combined with the fitting and sealing structure between the inner wall of the annular positioning boss 113 and the outer wall of the elastic conduit 12, the structural sealing effect between the outer wall of the elastic conduit 12 and the inner wall of the annular positioning boss 113 is further optimized, thereby completely eliminating the flow of gas between the inside of the pipe and the outside air through the gaps and connecting spaces between the inner wall of the annular positioning boss 113 and the outer wall of the elastic conduit 12.

[0053] Considering the integrated structure between the annular positioning boss 113 and the transition flange 11, and the through structure between the internal space of the annular positioning boss 113 and the internal space of the sampling hole 111 in the middle of the transition flange 11, the aforementioned port adhesive layer 13 can further ensure a more thorough sealing and isolation of the gap and space between the outer periphery of the elastic conduit 12 and the transition flange 11. This further avoids interference from external air to the gas inside the pipeline, optimizes the sampling effect of the gas inside the pipeline, and improves the accuracy of related detection.

[0054] On the other hand, the space between the outer wall of the elastic conduit 12 and the inner wall of the sampling hole 111 is filled with an inner adhesive layer that extends circumferentially along the elastic conduit 12 and connects end to end. The elastic conduit 12 and the sampling hole 111 are bonded and fixed together by the inner adhesive layer. If there is no annular positioning boss 113 and the corresponding port adhesive layer 13 structure, the inner adhesive layer alone can form a closed adhesive layer structure between the outer wall of the elastic conduit 12 and the inner wall of the sampling hole 111. This, combined with the tight fit between the outer wall of the elastic conduit 12 and the inner wall of the sampling hole 111, forms a complete seal and isolation of the space between the outer wall of the elastic conduit 12 and the inner wall of the sampling hole 111. This prevents external air from flowing with the gas inside the pipe through the gap or connecting space between the sampling hole 111 and the outer wall of the elastic conduit 12, eliminating interference from external air on the sampling operation of the gas inside the pipe, and ensuring the purity of the collected gas sample and the accuracy of the corresponding detection results.

[0055] Of course, in practical applications, if the adapter flange 11 is integrated with an annular positioning boss 113 and a corresponding port adhesive layer 13 is arranged, then it can also be combined with the above-mentioned in-hole adhesive layer structure to form a double adhesive layer sealing structure on the outer wall of the elastic conduit 12, thereby further blocking the gas exchange space at the outer wall of the elastic conduit 12 and avoiding interference from external air to the gas collection process inside the pipeline.

[0056] Accordingly, in practical applications, the adhesive layer 13 at the port and the adhesive layer inside the hole are generally made of epoxy resin adhesive to meet the bonding and assembly requirements and gap sealing requirements under most working conditions. Of course, if the actual application conditions are more special or for some specific working conditions, other types of adhesives can also be selected to meet the corresponding application requirements. In principle, any adhesive that can guarantee the bonding and space sealing requirements between the outer periphery of the elastic conduit 12 and the corresponding adapter is acceptable.

[0057] Generally, the adapter flange 11 is provided with several positioning holes 114. The positioning holes 114 penetrate the adapter flange 11 along its axial direction, and are arranged sequentially along the circumference of the adapter flange 11. Positioning bolts that can be adapted to the flange connection surface of the pipeline sampling port are inserted into the positioning holes 114. In actual assembly, the positioning holes 114 need to be coaxially adapted to the screw holes on the flange mating surface at the pipeline sampling port one by one to ensure that each positioning bolt can be accurately inserted into the corresponding screw hole and completed with thread tightening. This ensures an accurate and reliable connection between the adapter flange 11 and the pipeline sampling port, thereby enabling the pipeline gas sampling auxiliary device to be accurately and reliably installed at the pipeline sampling port, ensuring the corresponding sampling accuracy and efficiency.

[0058] It should be noted that, during the actual sampling operation, after removing the original sealing flange at the pipeline sampling port, the entire pipeline gas sampling auxiliary device should be quickly aligned and arranged at the pipeline sampling port, and the adapter flange 11 should be reliably connected to the flange mating surface of the pipeline sampling port. This is to minimize the open exposure time of the pipeline sampling port and reduce the time for the gas inside the pipeline to exchange with the outside air through the open pipeline sampling port, thereby minimizing the interference and adverse effects of the outside air on the sampling process of the gas inside the pipeline.

[0059] In practical applications, the flexible conduit 12 is made of rubber or silicone. Rubber or silicone tubing is not only flexible but also has good working condition tolerance, fully meeting the requirements of the gas sampling process. Specifically, the flexible conduit 12 can be slightly smaller than the outer diameter of the sampling tube of the sampling device, allowing for an interference fit. This means that after the sampling tube is inserted into the sampling chamber 121, the inner wall of the flexible conduit 12 can be appropriately stretched and deformed by the sampling tube, ensuring that the inner wall of the flexible conduit 12 fully fits and wraps around the outer wall of the sampling tube. This eliminates any gaps between the flexible conduit 12 and the sampling tube, preventing gas inside the pipeline from exchanging with external air through the space or gap between the flexible conduit 12 and the sampling tube, thus avoiding interference from external air during the gas sampling process.

[0060] Of course, the elastic conduit 12 can also be a corrugated pipe. When subjected to compression or impact, the corrugated pipe can mitigate the structural impact through appropriate deformation, thereby effectively ensuring the structural protection and support effect of the elastic conduit 12 on the sampling tube inside, and preventing the sampling tube from being damaged.

[0061] Accordingly, the material of the corrugated pipe can be engineering plastic, rubber or silicone, or metal corrugated pipe. In practical applications, the specific material of the corrugated pipe can be flexibly selected and adjusted according to specific working conditions and application requirements. In principle, any material that can meet the actual application needs of the pipeline gas sampling auxiliary device is acceptable.

[0062] In summary, the pipeline gas sampling auxiliary device provided in this utility model, when it is necessary to sample and detect the gas inside the pipeline, can have its sealing flange at the pipeline sampling port removed. Then, the front end of the elastic conduit can be quickly inserted into the pipeline sampling port, and the adapter flange can be aligned and securely connected to the pipeline sampling port. This completes the alignment and installation of the pipeline gas sampling auxiliary device with the pipeline sampling port. Then, the sampling tube of the sampling device can be inserted into the sampling chamber from back to front until the sampling portion of the sampling tube extends from the front end of the elastic conduit and is inside the pipeline. Afterward, the corresponding gas sampling work can be performed on the pipeline. During sampling, the adapter flange can fasten and seal the main structure of the sampling port. Simultaneously, the circumferential fit between the outer wall of the elastic conduit and the inner wall of the sampling hole ensures the sealing of the space between the elastic conduit and the sampling hole. Furthermore, the tight fit between the inner wall of the sampling chamber and the outer wall of the sampling tube of the sampling device achieves the sealing of the space between the sampling chamber and the sampling tube. Therefore, after the pipeline gas sampling auxiliary device is installed on the pipeline sampling port and properly fitted with the sampling tube of the sampling device, the gas inside the pipeline can only escape through the internal conduit of the sampling tube. This ensures that the gas sample collected through the sampling tube can be smoothly and efficiently delivered into the sampling device, avoiding problems during the sampling process. The gas inside the pipeline leaks out through the sampling port and the flexible conduit, and between the sampling chamber and the sampling tube, effectively reducing the contact between the gas inside the pipeline and the outside air. This reduces the impact of the external gas environment on the gas environment inside the pipeline, thus avoiding interference from the outside air during the sampling process. This ensures the purity and sampling efficiency of the collected gas samples and makes the corresponding sampling and gas detection data more accurate and reliable. At the same time, it effectively reduces the risk of deflagration or air pollution caused by the gas inside the pipeline escaping into the outside air environment during the sampling process, significantly reducing safety hazards during the sampling operation and making the operation of pipeline gas sampling safer and smoother for the staff.

[0063] The pipeline gas sampling auxiliary device provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A pipeline gas sampling aid, comprising: The adapter flange plate is coaxially penetrated by a sampling hole in the middle part, and the elastic conduit is inserted into the sampling hole, and the outer wall of the elastic conduit is fixedly connected with the inner wall of the sampling hole in the circumferential direction to form a circumferential closed connection, the inside of the elastic conduit has a sampling cavity capable of accommodating a sampling tube, and the inner wall of the sampling cavity is tightly fitted with the outer wall of the sampling tube to form a circumferential closed fitting. The front end of the elastic conduit protrudes from the front disc surface of the adapter flange plate in the axial direction, and the inner diameter of the sampling cavity increases from front to back in the axial direction.

2. The pipeline gas sampling aid of claim 1, wherein, The rear end of the elastic conduit protrudes from the rear disc surface of the adapter flange plate in the axial direction.

3. The pipeline gas sampling aid of claim 2, wherein, The annular positioning boss is coaxially arranged at the front end of the sampling hole, and the elastic conduit penetrates the sampling hole and the annular positioning boss from back to front.

4. The pipeline gas sampling aid of claim 2, wherein, The inner wall of the annular positioning boss is tightly fitted with the outer wall of the elastic conduit to form a circumferential closed fitting.

5. The pipeline gas sampling aid of claim 4, wherein, The annular positioning boss and the outer wall of the elastic conduit are filled with a port adhesive layer extending along the circumferential direction of the elastic conduit and connected end to end, and the annular positioning boss and the elastic conduit are adhesively fixed through the port adhesive layer.

6. The pipeline gas sampling aid of claim 5, wherein, The outer wall of the elastic conduit and the inner wall of the sampling hole are filled with a hole-in adhesive layer extending along the circumferential direction of the elastic conduit and connected end to end, and the elastic conduit and the sampling hole are adhesively fixed through the hole-in adhesive layer.

7. The pipeline gas sampling aid of claim 1, wherein, The adapter flange plate is provided with a plurality of positioning holes penetrating the adapter flange plate in the axial direction of the adapter flange plate, and each positioning hole is arranged in sequence in the circumferential direction of the adapter flange plate, and the positioning bolt capable of fitting with the flange connecting surface of the pipeline sampling port is inserted into the positioning hole.

8. The pipeline gas sampling aid of claim 1, wherein, The elastic conduit is a rubber tube or a silica gel tube.

9. The pipeline gas sampling aid of claim 1, wherein, The elastic conduit is a corrugated tube.

10. The pipeline gas sampling aid of claim 1, wherein, ​

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