Self-adaptive air volume sampling device

Abstract

The invention discloses a self-adaptive air volume sampling device which comprises a first sampling pipe, a self-adaptive rotating assembly and a first control surface component, one end of the first sampling pipe is configured to be a first air inlet, and the other end of the first sampling pipe is configured to be a first sampling opening; the self-adaptive rotating assembly comprises a supporting structural part and a first damage prevention part, the supporting structural part is arranged at the end where the first air inlet is located and rotationally connected with the first sampling pipe, the supporting structural part comprises a drainage structure communicated with the first sampling pipe, and the first control surface part is arranged on the outer side of the drainage structure; the first damage prevention part is arranged on the outer side of the supporting structural part in the mode of being opposite to the first control surface part, and / or the first damage prevention part is arranged on the inner wall of the supporting structural part in the mode of being close to the first control surface part. The self-adaptive air volume sampling device provided by the invention automatically adapts to the change of an air flow field, so that the service life of a product is greatly prolonged; the anti-blocking capability is extremely high; the measurement is more accurate.

Description

Technical Field

[0001] This invention relates to the field of gas analysis device technology, and in particular to an adaptive airflow sampling device. Background Technology

[0002] In industries such as petrochemicals, power, metallurgy, and environmental protection, online measurement of gas flow in pipelines is one of the core components of process control, energy efficiency assessment, safety interlocking, and environmental emission accounting.

[0003] Currently, gas flow meters come in various forms, with differential pressure flow meters enjoying widespread application due to their simple structure, adaptability to high-temperature and high-pressure conditions, and low cost. Differential pressure flow meters have various sampling devices, including single-point sampling devices and multi-pipe multi-point sampling devices. Generally speaking, due to the complexity and variable characteristics of the gas flow field within the pipeline, especially turbulence, simple single-point sampling is far less effective than multi-point sampling.

[0004] Whether using single-point or multi-tube sampling, the sampling port plane of the sampling tube and the gas flow direction within the pipe are typically not parallel; they are tangential to the gas flow direction, especially on the windward side. This obstruction of the airflow guides it into the sampling port, allowing for a more efficient and effective intake of airflow and better detection of airflow changes. This structural characteristic results in the windward side of the sampling tube being subjected to significant, long-term, and continuous airflow impact. After prolonged operation, the windward side of the sampling tube, and even parts of the main pipe, can be worn away by the airflow impact, leading to tube damage and the inability to perform flow measurement.

[0005] To address this issue, existing technologies typically involve lining the sampling tube surface with wear-resistant materials such as ceramics to mitigate wear during high-speed airflow. However, due to the complex airflow variations within the tube, the supporting metal structure is still susceptible to erosion from the changing airflow direction, leading to rapid wear. Completely encasing the metal structure in wear-resistant materials also significantly increases its volume and overall weight.

[0006] In summary, existing sampling devices generally have the following shortcomings.

[0007] (1) Design flaws of the sampling port: The sampling port plane of traditional sampling tubes is usually perpendicular or tangential to the airflow direction in the pipe, and the windward side is directly exposed to the high-speed airflow. After long-term operation, the continuous impact of the airflow will cause severe wear on the windward side of the sampling tube, and may even cause the metal structural components to be eroded and damaged, affecting the accuracy of flow measurement.

[0008] (2) Limitations of the application of wear-resistant materials: To alleviate wear problems, existing technologies often cover the surface of the sampling tube with wear-resistant materials such as ceramics. However, this design cannot completely avoid the impact of changes in airflow direction on the metal structure, and the coverage of wear-resistant materials will increase the size and weight of the device, affecting the structural stability.

[0009] (3) Dust accumulation and blockage problem: Dust particles in the airflow in the pipeline are prone to accumulate inside the sampling tube, especially at the sampling ports on the windward and leeward sides. Long-term accumulation will lead to blockage of the sampling ports and reduce measurement accuracy.

[0010] The above background information is provided only to assist in understanding the inventive concept and technical solution of this invention. It does not necessarily belong to the prior art of this application, nor does it necessarily provide technical teaching. In the absence of clear evidence that the above information was disclosed before the filing date of this application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Summary of the Invention

[0011] The purpose of this invention is to provide an adaptive airflow sampling device that utilizes a rudder surface structure to automatically adapt to changes in the airflow field and automatically guides the flow-guiding structure to always face the airflow impact, avoiding the impact of the airflow on the metal structure in the device and greatly extending the life of the sampling device; the powerful torque of the rudder surface structure achieves extremely strong anti-clogging capability; and ensures high measurement accuracy.

[0012] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0013] An adaptive airflow sampling device includes a first sampling tube, an adaptive rotating assembly, and a first rudder surface component, wherein one end of the first sampling tube is configured as a first air inlet and the other end is configured as a first sampling port.

[0014] The adaptive rotation component includes a support structure and a first anti-damage component. The support structure is located at the end where the first air inlet is located and is rotatably connected to the first sampling tube. The support structure includes a flow-guiding structure that communicates with the first sampling tube. The first rudder surface component is located on the outside of the flow-guiding structure.

[0015] The first anti-damage component is disposed on the outer side of the support structure opposite to the first rudder surface component, and / or the first anti-damage component is disposed on the inner wall of the support structure close to the first rudder surface component.

[0016] Furthermore, following any one or a combination of the aforementioned technical solutions, the method further includes a cleaning component, one end of which is connected to the supporting structure. The cleaning component has an extension structure that extends into the interior of the first sampling tube and contacts the inner wall of the first sampling tube to clean the inner wall of the first sampling tube under the rotation of the supporting structure.

[0017] Furthermore, following any one or a combination of the aforementioned technical solutions, the extension structure includes a scraper facing the inner wall of the first sampling tube, with a first gap pre-set between the scraper and the inner wall of the first sampling tube; and / or,

[0018] The body of the extension structure is provided with a spiral groove extending along its length.

[0019] Furthermore, following any one or a combination of the aforementioned technical solutions, the size of the first gap is 0.2mm-0.5mm.

[0020] Furthermore, based on any or a combination of the aforementioned technical solutions, the air inlet surface of the air diversion structure is an inclined surface relative to the horizontal plane, and the first rudder surface component is disposed on the outside of the support structure component facing away from the air inlet.

[0021] The adaptive rotation assembly includes at least a first damage protection component disposed on the inner wall of the flow guide structure and near the location of the first rudder surface component.

[0022] Furthermore, based on any or a combination of the aforementioned technical solutions, the adaptive rotation component further includes a second anti-damage component, which is connected to the support structure and rotates synchronously with the support structure. The second anti-damage component extends to the location of the outer wall of the first sampling tube.

[0023] And / or,

[0024] The outer wall of the first sampling tube is provided with a third anti-damage component.

[0025] Furthermore, following any one or a combination of the aforementioned technical solutions, the second damage-prevention component includes a silicon carbide sheet; and / or,

[0026] The second anti-damage component has a Mohs hardness ≥ 9.5 and a porosity of 8%-15%; and / or,

[0027] The third anti-damage component is configured as a silicon carbide sheet and / or a ceramic coating disposed on the outer wall of the first sampling tube; and / or,

[0028] The third anti-damage component has a Mohs hardness ≥9.5 and a porosity of 8%-15%.

[0029] Furthermore, following any one or a combination of the aforementioned technical solutions, a second sampling tube is also included, wherein the first sampling tube is positioned facing the wind, the second sampling tube is positioned not facing the wind, one end of the second sampling tube is configured as a second air inlet, and the other end is configured as a second sampling port.

[0030] Furthermore, in accordance with any or a combination of the aforementioned technical solutions, the second air inlet of the second sampling tube is also provided with the adaptive rotation component, and further includes a second rudder surface component, which is disposed on the outside of the support structure corresponding to the second sampling tube.

[0031] Furthermore, based on any one or a combination of the aforementioned technical solutions, the area of ​​the second control surface component is 60%-80% of the area of ​​the first control surface component.

[0032] Furthermore, in accordance with any or a combination of the aforementioned technical solutions, the first sampling tube and the adaptive rotating assembly are rotatably connected by a rotating connecting component, wherein the rotating connecting component adopts a universal joint structure or a bearing structure;

[0033] And / or,

[0034] The rotation angle range of the first control surface component is [-45°, 45°];

[0035] And / or,

[0036] The first anti-damage component is configured as a silicon carbide sheet and / or ceramic coating disposed on the drainage structure;

[0037] And / or,

[0038] The first anti-damage component has a Mohs hardness ≥ 9.5 and a porosity of 8%-15%.

[0039] The beneficial effects of the technical solution provided by this invention are as follows:

[0040] a. This invention adds a rudder surface structure to an independent adaptive rotating component. While guiding the airflow into the first air inlet of the first sampling tube, it also ensures that the most effective resistance section of the wear-resistant structural component in the windward component, i.e. the adaptive rotating component, always adaptively faces the direction of the main airflow. In this way, no matter how the direction of the main airflow changes, it always impacts the wear-resistant material on the surface of the windward component rather than the metal structural component, avoiding the direct impact of the main airflow. This can enhance the wear resistance of the sampling device and significantly extend the service life of the device.

[0041] b. This invention provides a cleaning component that extends into the sampling tube on the adaptive rotating assembly. The reciprocating motion of the extended structure of the cleaning component effectively removes the accumulated dust inside the sampling tube, achieving an automatic anti-clogging function. No manual maintenance is required, reducing operating costs. At the same time, due to the impact and shaking of the rudder surface structure by the airflow, a very strong torque is generated, achieving a powerful torque that existing anti-clogging structures cannot provide, effectively preventing the sampling tube from clogging.

[0042] c. The adaptive air volume sampling device provided by the present invention has a compact and lightweight structure. The movable connection design and the local application of wear-resistant materials avoid the problems of large size, increased weight and high cost caused by the full wrapping of wear-resistant materials in traditional sampling devices. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this application 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 recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 A first perspective view of an adaptive airflow sampling device provided as an exemplary embodiment of the present invention;

[0045] Figure 2 For the present invention Figure 1 A cross-sectional view of the adaptive airflow sampling device shown.

[0046] Figure 3 A second perspective view of an adaptive airflow sampling device provided as an exemplary embodiment of the present invention;

[0047] Figure 4 For the present invention Figure 3 A cross-sectional view of the adaptive airflow sampling device shown.

[0048] Figure 5 A perspective view of another adaptive airflow sampling device provided as an exemplary embodiment of the present invention;

[0049] Figure 6 For the present invention Figure 5 The enlarged view shown at point A in the middle.

[0050] The reference numerals in the attached drawings include: 1-first sampling tube, 11-first air inlet, 12-first sampling port, 13-third damage protection component, 2-second sampling tube, 21-second air inlet, 22-second sampling port, 3-cleaning component, 31-extension structure component, 4-adaptive rotation assembly, 41-support structure component, 42-first damage protection component, 43-second damage protection component, 5-rotational connection component, and 61-first rudder surface component. Detailed Implementation

[0051] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0052] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, apparatus, product, or device that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0053] In one embodiment of the present invention, an adaptive airflow sampling device is provided, see [link to relevant documentation]. Figures 1 to 4 The adaptive airflow sampling device includes a first sampling tube 1, a second sampling tube 2, an adaptive rotating assembly 4, a first rudder surface component 61, and a second rudder surface component ( Figures 1 to 6 (The second rudder surface component is not shown). One end of the first sampling tube 1 is configured as a first air inlet 11 and the other end is configured as a first sampling port 12. One end of the second sampling tube 2 is configured as a second air inlet 21 and the other end is configured as a second sampling port 22. The first sampling tube 1 is positioned facing the wind, and the second sampling tube 2 is positioned away from the wind, preferably in a leeward position.

[0054] The first sampling port 12 of the first sampling tube 1 is provided with the adaptive rotation component 4, and the adaptive rotation component 4 corresponding to the first sampling tube 1 is provided with the first rudder surface component 61. The second air inlet 21 of the second sampling tube 2 is also provided with the adaptive rotation component 4, and the adaptive rotation component 4 corresponding to the second sampling tube 2 is provided with the second rudder surface component.

[0055] The adaptive rotation component 4 includes a support structure 41 and a first anti-damage component 42. The first sampling tube 1 / second sampling tube 2 and the adaptive rotation component 4 are rotatably connected by a rotary connecting component 5. Preferably, the rotary connecting component 5 adopts a universal joint structure or a bearing structure. The support structure 41 has a flow guiding structure, which is configured to block airflow and guide the blocked airflow into the sampling tube connected to the adaptive rotation component 4.

[0056] Taking the adaptive rotating assembly 4 connected to the first sampling tube 1 as an example, the supporting structure 41 is located at the end where the first air inlet 11 is located and is rotatably connected to the first sampling tube 1 through the rotating connecting component 5. The supporting structure 41 includes a flow-guiding structure communicating with the first sampling tube 1, and the first rudder surface component 61 is located on the outside of the flow-guiding structure. Based on the limitation of the rotating connecting component 5, the rotation angle range of the first rudder surface component 61 is [-45°, 45°].

[0057] The first anti-damage component 42 is disposed on the outer side of the support structure 41, facing away from the first rudder surface component 61, and / or, the first anti-damage component 42 is disposed on the inner wall of the support structure 41 close to the first rudder surface component 61. Preferably, the first anti-damage component 42 is configured as a silicon carbide sheet and / or a ceramic coating disposed on the drainage structure; the first anti-damage component 42 has a Mohs hardness ≥ 9.5 and a porosity of 8%-15%.

[0058] The air inlet of the flow-guiding structure is an inclined surface relative to the horizontal plane. The first rudder surface component 61 is disposed on the outer side of the support structure 41, facing away from the air inlet. The adaptive rotation component 4 includes at least a first anti-damage component 42 disposed on the inner wall of the flow-guiding structure and near the location of the first rudder surface component 61. More preferably, the first anti-damage component 42 is also disposed on the outer wall of the flow-guiding structure at a position away from the first rudder surface component 61. The first anti-damage component 42 is distributed on the pipe wall of the flow-guiding structure along a direction parallel to the axis of the flow-guiding structure. Preferably, the central angle corresponding to the circumferential distribution area of ​​the first anti-damage component 42 is preferably not less than 10° and not more than 180°, which can balance wear resistance and the portability of the device.

[0059] In airflow sampling devices, although both the sampling tube surface and the drainage structure can be coated with wear-resistant materials as damage protection, their opposing structures result in completely different airflow impact effects. The sampling tube surface, being a circular structure, significantly reduces resistance in the airflow field; however, the drainage structure, needing to guide airflow into the sampling port, cannot prioritize resistance reduction. Instead, it must enhance its ability to block airflow, guiding more airflow into the sampling port to better achieve differential pressure measurement. In essence, the drainage structure suffers far more actual airflow erosion damage than the windward surface of the sampling tube.

[0060] The adaptive airflow sampling device provided in this embodiment sets the windward surface as an independent moving part. By adding a rudder structure to the independent adaptive rotating component 4, while guiding the airflow into the first air inlet of the first sampling tube 1, it also ensures that the most effective resistance section of the wear-resistant structural component in the windward component, i.e. the adaptive rotating component 4, always adaptively faces the direction of the main airflow. In this way, no matter how the direction of the main airflow changes, it always impacts the wear-resistant material on the surface of the windward component rather than the metal structural component, thus avoiding the direct impact of the main airflow.

[0061] In addition, the adaptive air volume sampling device has a compact and lightweight structure, and the movable connection design and local application of wear-resistant materials avoid the problems of large size, high cost and increased weight caused by the full wrapping of wear-resistant materials in traditional devices.

[0062] In this embodiment, a third anti-damage component 13 is provided on the outer wall of the first sampling tube 1. The third anti-damage component 13 is configured as a silicon carbide sheet and / or ceramic coating disposed on the outer wall of the first sampling tube 1; the third anti-damage component 13 has a Mohs hardness ≥9.5 and a porosity of 8%-15%.

[0063] The adaptive airflow sampling device further includes a cleaning component 3, one end of which is connected to the support structure 41. The cleaning component 3 has an extension structure 31 that extends into the interior of the first sampling tube 1 and contacts the inner wall of the first sampling tube 1 to clean the inner wall of the first sampling tube 1 under the rotation of the support structure 41.

[0064] Preferably, the extension structure 31 includes a scraper facing the inner wall of the first sampling tube 1, and a first gap is pre-set between the scraper and the inner wall of the first sampling tube 1. The size of the first gap is 0.2mm-0.5mm. More preferably, the body of the extension structure 31 is provided with a spiral groove extending along its length. On the one hand, the dust scraped off by the scraper can be cleared out of the sampling tube through the spiral groove; on the other hand, the spiral groove can reduce the weight of the body of the extension structure 31, thus achieving a better dust removal effect.

[0065] For the second sampling tube 2, its second air inlet 21 is provided with the adaptive rotation component 4, and the second rudder surface component is disposed on the outside of the support structure 41 corresponding to the second sampling tube 2. If the air inlet surface of the second air inlet 21 is an inclined surface, then the second rudder surface component is disposed on the outside of the support structure 41 facing away from the air inlet surface. Preferably, the area of ​​the second rudder surface component is 60%-80% of the area of ​​the first rudder surface component 61.

[0066] Simultaneously, the first control surface component, during its movement, drives the cleaning component 3 to automatically remove accumulated dust from the sampling tube, achieving an automatic anti-clogging function, eliminating the need for manual maintenance, and reducing operating costs. It should be noted that in existing technologies, a swaying structure is suspended in the sampling tube to prevent dust blockage. However, due to the small size and low force of the swaying structure, its effectiveness in preventing blockage in high-dust environments is poor. The control surface structure provided in this application, due to its large size, is greatly affected by airflow and provides significant airflow feedback. It can generate considerable torque during device operation, thus enabling the cleaning component 3 to possess significant impact force, effectively preventing dust blockage in the sampling tube.

[0067] In another embodiment of the invention, see Figure 5 and Figure 6 Based on the adaptive airflow sampling device provided in the above embodiments, the adaptive rotating assembly 4 provided in this embodiment further includes a second anti-damage component 43. The second anti-damage component 43 is connected to the support structure 41 and rotates synchronously with the support structure 41. The second anti-damage component 43 extends to the location of the outer wall of the first sampling tube 1. The second anti-damage component 43 comprises a silicon carbide sheet; the Mohs hardness of the second anti-damage component 43 is ≥9.5, and its porosity is 8%-15%. In this embodiment, the outer wall of the first sampling tube 1 may or may not be provided with a third anti-damage component 13.

[0068] In another embodiment of the present invention, the difference from the adaptive air volume sampling device provided in the above embodiment is that the adaptive air volume sampling device provided in this embodiment does not have the adaptive rotation component 4 and the second rudder surface component at the air inlet of the second sampling tube 2.

[0069] In another embodiment of the present invention, the adaptive airflow sampling device differs from the adaptive airflow sampling device provided in the above embodiment in that the adaptive airflow sampling device provided in this embodiment is a single-point sampling structure. The adaptive airflow sampling device includes a first sampling tube 1, an adaptive rotation component 4, a first rudder surface component 61, and a cleaning component 3, but does not include the second sampling tube 2 and the second rudder surface component.

[0070] The adaptive air volume sampling device provided by the present invention will be further described below through some specific embodiments.

[0071] Example 1: Implementation and performance testing of the basic structure of the adaptive air volume sampling device.

[0072] I. The installation and parameter settings of each component of the adaptive air volume sampling device are as follows.

[0073] Pipe specifications: DN500 circular pipe, wind speed range 2-15m / s, dust concentration ≤30g / m³ 3 .

[0074] Installation location: 10D (D is the pipe diameter) downstream of the pipe bend, with the center line of the windward sampling pipe (i.e., the first sampling pipe in the above embodiment) forming an angle ≤5° with the airflow direction.

[0075] Sampling tube design: Windward sampling tube: length 300mm, air inlet diameter 50mm, sampling interface inner diameter 10mm.

[0076] The leeward sampling tube is the second sampling tube in the above embodiment: 250mm in length, 40mm inlet diameter, and 8mm inner diameter of sampling interface.

[0077] The center-to-center distance between the windward sampling tube and the leeward sampling tube is 120mm.

[0078] II. The wear-resistant components are configured as follows.

[0079] Material selection: The third protective component on the windward side of the windward sampling tube: silicon carbide wear-resistant sheet (hardness HRA91), 3mm thick, size 100mm×50mm; the wear-resistant material on the edge of the air inlet of the leeward sampling tube: alumina ceramic coating (thickness 0.5mm), spraying temperature 800℃.

[0080] Fixing method: The silicon carbide wear-resistant sheet is fixed to the metal support structure (316L stainless steel) with M6 bolts, with a bolt spacing of 50mm. The ceramic coating is applied using a plasma spraying process, with an adhesion of ≥30MPa.

[0081] III. The design of the rudder surface components is as follows.

[0082] Structural parameters: Rudder surface component: streamlined aluminum alloy structure, length 200mm, width 80mm, thickness 10mm; Connection method: connected to the metal support structure component, namely the support structure component 41 in the above embodiment, via a universal joint, allowing free rotation of ±30°.

[0083] Action Test: Under wind speed of 5 m / s, the control surface components completed an angle adjustment from 0° to 25° within 0.5 seconds. (Dust concentration: 20 g / m³) 3 After running continuously for 24 hours in the environment, there was no jamming of the control surface components.

[0084] IV. The anti-blocking mechanism is verified as follows.

[0085] Extended structural component design: The upper end of the metal support structure is provided with an extended structural component, namely the extended structural component 31 in the above embodiment: 8mm in diameter, 200mm in length, and surface-machined with a spiral groove (5mm pitch); Stroke: Driven by the rudder surface component, the extended structural component reciprocates within the sampling tube, with a stroke of 150mm.

[0086] Blockage test: at a wind speed of 8 m / s and a dust concentration of 30 g / m³ 3 After 48 hours of operation under the following conditions: Ash accumulation thickness in the windward sampling tube: 0.2mm at the inlet, 0.1mm on the tube wall. Ash accumulation thickness in the leeward sampling tube: 0.1mm at the inlet, 0.05mm on the tube wall.

[0087] Compared to traditional sampling tubes (without self-cleaning structure): dust accumulation thickness: 2.5mm at the inlet and 1.8mm on the tube wall.

[0088] Flow measurement error: Traditional devices have an error of up to 15%, while this device has an error of ≤3%.

[0089] V. The performance test results are as follows.

[0090] Abrasion resistance test: at a wind speed of 12m / s and a dust concentration of 20g / m³ 3 The test results after 1000 hours of operation under the following conditions are as follows: wear amount of silicon carbide wear-resistant sheet: 0.02mm (wear rate 0.00067mm / h); wear amount of stainless steel sampling tube (without wear-resistant layer): 0.8mm (wear rate 0.0008mm / h).

[0091] Flow measurement accuracy: Under different wind speed conditions (2-15m / s), compared with the standard Pitot tube method, the maximum error of this device is 2.8% (wind speed 15m / s). The average error is 1.5% (the error of traditional devices is 5-8%).

[0092] Example 2: Multi-point sampling optimization and dynamic response test of adaptive air volume sampling device.

[0093] I. The upgraded design of the leeward sampling tube is as follows.

[0094] Dual control surface structure: The leeward sampling tube is equipped with an independent second control surface component, with structural parameters consistent with those of the windward sampling tube control surface.

[0095] Metal support structure 2: 200mm in length, connected by a ball joint, allowing three-dimensional rotation.

[0096] Annular air inlet: 80mm in diameter, wear-resistant part 2 covers the edge of the annular opening, with a thickness of 2mm, and the material is silicon nitride (hardness HRA93).

[0097] The annular opening is divided into 12 evenly distributed sectors, and each sector is sampled independently.

[0098] II. Collaborative work mode test.

[0099] Multi-point sampling data: The test results obtained by simultaneously collecting data from the windward and leeward sampling tubes under a wind speed of 10 m / s are as follows.

[0100] Pressure differential at the windward sampling tube: 125 Pa (fluctuation range ±3 Pa).

[0101] Differential pressure of the leeward sampling tube: 122 Pa (fluctuation range ±2 Pa).

[0102] Average pressure difference: 123.5 Pa, with an error of 1.2% compared to the standard value (124 Pa).

[0103] Dynamic response test: The test condition was a sudden 20° change in airflow direction within 0.5 seconds, and the test results are as follows.

[0104] Response time of the windward sampling tube rudder surface: 0.3 seconds, angle adjustment error ±2°.

[0105] Leeward sampling tube rudder surface response time: 0.4 seconds, angle adjustment error ±3°.

[0106] Differential pressure signal settling time: The error fluctuation range decreased from ±5% to ±1.5% within 1.2 seconds.

[0107] III. Verification of the flow calculation algorithm.

[0108] Data processing method: The formula for calculating flow rate using the weighted average method is as follows:

[0109]

[0110] Where Q represents the volumetric flow rate (m³ / s). 3 / s), ρ represents the fluid density (kg / m³) 3 A represents the cross-sectional area of ​​the pipe (m²). 2 ), ΔP avg This represents the average pressure difference (Pa).

[0111] This formula describes the physical relationship between fluid flow rate Q and pressure difference ΔP. Its derivation is based on Bernoulli's equation and the continuity equation, and it is applicable to pipe flow calculations for incompressible fluids.

[0112] Algorithm test results: Under different operating conditions (wind speed 5-15m / s, dust concentration 10-30g / m³), 3 Maximum calculation error: 2.2% (traditional algorithm error 8-12%), algorithm response time: 1.5 seconds (traditional algorithm 3-5 seconds).

[0113] Example 3: Extreme operating conditions and reliability testing are as follows.

[0114] I. High-temperature environment adaptability test.

[0115] Test conditions: Pipeline temperature: 200℃, air velocity: 8m / s, dust concentration: 15g / m³ 3 Metal support structure material: Inconel 625 (temperature resistance 650℃). Control surface component coating: ceramic heat insulation layer (1mm thickness), thermal conductivity 0.2W / (m·K).

[0116] Test results: After 72 hours of continuous operation, the metal support structure showed no thermal deformation, and the extended structure moved normally. The surface temperature of the control surface component was 180℃, and the internal temperature was 150℃ (compared to 280℃ for traditional aluminum alloy control surfaces). The flow measurement error was ≤2.5% (compared to 8-10% for traditional devices at high temperatures).

[0117] II. Enhanced testing in high-dust environments.

[0118] Test conditions: Dust concentration: 50 g / m³ 3 Wind speed 10m / s, particle size 0.5-500μm.

[0119] Extended structural component design: spiral groove pitch 3mm, surface roughness Ra0.8μm.

[0120] Microporous structure of wear-resistant parts: pore diameter 0.2mm, porosity 5%.

[0121] After 120 hours of continuous operation, the test results are as follows: Dust accumulation thickness: 0.3mm at the inlet of the windward sampling tube, and 0.2mm at the leeward sampling tube. Flow measurement error: ≤3.5% (compared to 18-25% for traditional devices). Wear of wear-resistant parts: 0.03mm for silicon carbide wafers and 0.01mm for silicon nitride wafers.

[0122] III. Long-term reliability testing.

[0123] Test conditions: Cyclic operating parameters include wind speed varying randomly from 2 to 15 m / s, and dust concentration ranging from 10 to 30 g / m³. 3 Temperature 50-200℃.

[0124] After 300 hours of continuous operation, the test results were as follows: no mechanical component failures; fatigue damage rate of metal support structure: 0.05% (damage rate of traditional structure: 1.2%); jamming rate of control surface component: 0% (jamming rate of traditional device: 8-12%).

[0125] Overall performance indicators: Average flow measurement error: 1.8% (compared to 5-12% for traditional devices).

[0126] The test results from the detailed embodiments above demonstrate that the adaptive airflow sampling device provided by this invention exhibits significant advantages in terms of wear resistance, anti-clogging capability, multi-point sampling accuracy, and adaptability to extreme operating conditions. Specific advantages include: improved wear resistance, with wear rates of silicon carbide and silicon nitride wear-resistant components reduced by more than 80% compared to traditional devices; improved anti-clogging efficiency, with dust accumulation thickness reduced by 80-90% and flow measurement error reduced by 60-70%; optimized measurement accuracy, with multi-point sampling and a dynamic response mechanism controlling the error within ±2.5%, an improvement of 40-60% compared to traditional devices. Extreme environmental adaptability: high temperature (200℃) and high dust (50g / m³) conditions. 3 It maintains high reliability even under certain conditions.

[0127] Through structural innovation and material optimization, this device effectively solves the performance bottleneck of traditional sampling devices under complex working conditions. It automatically adapts to changes in airflow field and avoids the flow diversion structure from being destroyed. At the same time, the powerful torque generated by the rudder surface prevents the sampling tube from clogging in high dust conditions, providing an efficient and reliable solution for the field of industrial flow detection.

[0128] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0129] The above description is only a specific embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. An adaptive air volume sampling device, comprising: It includes a first sampling tube (1), an adaptive rotation assembly (4), and a first control surface component (61). One end of the first sampling tube (1) is configured as a first air inlet (11), and the other end is configured as a first sampling port (12). The adaptive rotation component (4) includes a support structure (41) and a first anti-damage component (42). The support structure (41) is located at the end of the first air inlet (11) and is rotatably connected to the first sampling tube (1). The support structure (41) includes a flow-guiding structure that communicates with the first sampling tube (1). The first rudder surface component (61) is located on the outside of the flow-guiding structure. The flow-guiding structure is used to guide airflow into the first air inlet (11). The first anti-damage component (42) is disposed on the outside of the support structure (41) away from the first rudder surface component (61), and / or the first anti-damage component (42) is disposed on the inner wall of the support structure (41) close to the first rudder surface component (61).

2. The self-adapting air volume sampling device of claim 1, wherein, It also includes a cleaning component (3), one end of which is connected to the support structure (41). The cleaning component (3) has an extension structure (31) that extends into the interior of the first sampling tube (1) and contacts the inner wall of the first sampling tube (1) to clean the inner wall of the first sampling tube (1) under the rotation of the support structure (41).

3. The self-adapting air volume sampling device of claim 2, wherein, The extension structure (31) includes a scraper facing the inner wall of the first sampling tube (1), and a first gap is pre-set between the scraper and the inner wall of the first sampling tube (1); and / or, The body of the extension structure (31) is provided with a spiral groove extending along its length.

4. The self-adapting air volume sampling device of claim 3, wherein, The size of the first gap is 0.2mm-0.5mm.

5. The self-adapting air volume sampling device of claim 1, wherein, The air inlet of the air diversion structure is an inclined surface relative to the horizontal plane, and the first rudder surface component (61) is disposed on the outside of the support structure component (41) facing away from the air inlet. The adaptive rotation component (4) includes at least a first anti-damage component (42) disposed on the inner wall of the flow guide structure and near the location of the first rudder surface component (61).

6. The self-adapting air volume sampling device of claim 1, wherein, The adaptive rotation component (4) further includes a second anti-damage component (43), which is connected to the support structure (41) and rotates synchronously with the support structure (41). The second anti-damage component (43) extends to the location of the outer wall of the first sampling tube (1). And / or, The outer wall of the first sampling tube (1) is provided with a third anti-damage component (13).

7. The self-adapting air volume sampling device of claim 6, wherein, The second protective component (43) includes a silicon carbide sheet; and / or, The second anti-damage component (43) has a Mohs hardness ≥ 9.5 and a porosity of 8%-15%; and / or, The third protective element (13) is configured as a silicon carbide sheet and / or ceramic coating disposed on the outer wall of the first sampling tube (1); and / or, The third anti-damage component (13) has a Mohs hardness ≥9.5 and a porosity of 8%-15%.

8. The self-adapting air volume sampling device of claim 1, wherein, The second sampling pipe (2) is arranged non-windwardly, one end of the second sampling pipe (2) is configured as a second air inlet (21), and the other end is configured as a second sampling port (22).

9. The self-adapting air volume sampling device of claim 8, wherein, The second air inlet (21) of the second sampling pipe (2) is also provided with the adaptive rotating assembly (4), and a second rudder surface component is arranged on the outer side of the corresponding support structure component (41) of the second sampling pipe (2).

10. The self-adapting air volume sampling device of claim 9, wherein, The area of the second rudder surface component is 60%-80% of the area of the first rudder surface component (61).

11. The self-adapting air volume sampling device of claim 1, wherein, The first sampling pipe (1) and the adaptive rotating assembly (4) are rotationally connected through a rotating connecting component (5) in a universal joint structure or a bearing structure. And / or, The rotation deflection angle range of the first rudder surface component (61) is [-45°, 45°]; And / or, The first damage prevention component (42) is configured as a silicon carbide sheet and / or a ceramic coating arranged on the flow guide structure; And / or, The first damage prevention component (42) has a Mohs hardness of greater than or equal to 9.5 and a porosity of 8%-15%.

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