Sampling tube, sampling tube assembly and thermotechnical measurement system

Abstract

The utility model relates to a sampling pipe, a sampling pipe assembly and a thermotechnical measurement system, the sampling pipe comprises a pipe body, the pipe body comprises a plurality of V-shaped pipes which are sequentially communicated along the flue gas circulation direction to form a wave structure, the bending end of each V-shaped pipe forms a wave crest of the wave structure, and the two ends of the opening of each V-shaped pipe form wave troughs of the wave structure; the two ends of the pipe body in the flue gas circulation direction communicate with a flue correspondingly. The ventilation openings are formed in the wave troughs and used for being communicated with the flue; and the sampling port is formed at the wave crest and is used for being communicated with measuring equipment. According to the flue gas sampling pipe, the pipe body is constructed to be of the wave structure, so that deposition of particulate matter in flue gas in the pipe is reduced, the risk that the sampling pipe is blocked is reduced, in addition, the flue gas can be effectively guided to flow through the design of the V-shaped pipe, the flue gas can be fully mixed when passing through the sampling pipe, and therefore the sampling representativeness and accuracy are improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of measurement and sampling, and in particular to a sampling tube, a sampling tube assembly, and a thermal measurement system. Background Art

[0002] The degree of automation of large thermal power units is getting higher and higher, and the units are becoming more and more dependent on automatic control systems. The requirements for the safety and stability of the unit's automatic control system during the operation of the unit are also getting higher and higher, and the corresponding requirements for the stability of the measurement system are also getting higher and higher. Due to the diversity of the measured media, the sampling pipeline of the thermal measurement system often becomes blocked, affecting normal measurement. Therefore, how to prevent the blockage of the sampling pipeline in the thermal measurement system has become very necessary. In the related art, there are usually two ways to prevent the blocking of the sampling pipeline. One is to add an anti-blocking sampling device at the root of the sampling part. The anti-blocking sampling device mainly uses the internal structure to prevent the measuring medium from entering the sampling pipeline. This method is suitable for system measurements with fewer impurities in the sampling pipeline. Once the measured part is full of dust and other impurities, it is easy to block the sampling device. Moreover, once the sampling device is blocked, it is difficult to handle it online. The other method is to manually purge the sampling pipeline regularly. This method requires regular manual operation, and the working cycle is not easy to master. Normal measurement cannot be performed during the working process. If the operating cycle is short, a large number of maintenance operations will be added, which is also not conducive to personal and system safety. Utility Model Content

[0003] The purpose of the present disclosure is to provide a sampling tube, a sampling tube assembly and a thermal measurement system to at least partially solve the technical problems existing in the related art.

[0004] In order to achieve the above objectives, the present disclosure provides a sampling tube, comprising:

[0005] A pipe body, the pipe body comprising a plurality of V-shaped pipes sequentially connected and arranged along the direction of smoke flow to form a wave structure, wherein the bent ends of the V-shaped pipes form the crests of the wave structure, and the two ends where the V-shaped pipes are opened form the troughs of the wave structure, and the two ends of the pipe body along the direction of smoke flow are respectively connected to the flue;

[0006] a vent formed at the trough for communicating with the flue; and

[0007] A sampling port is formed at the wave crest and is used for communicating with a measuring device.

[0008] Optionally, the height directions of the wave crest and the wave trough are perpendicular to the smoke flow direction.

[0009] Optionally, the sampling tube further includes a first connecting tube, one end of which is connected to the sampling port, and the other end of which extends in a direction away from the tube body and is connected to the measuring device.

[0010] Optionally, there are multiple sampling ports, and the multiple sampling ports are respectively formed at multiple wave peaks. There are multiple first connecting tubes and they match the number of the sampling ports. One end of each of the first connecting tubes is connected to the corresponding sampling port, and the other end is connected to the measuring device.

[0011] Optionally, the bending angle α of the V-shaped tube is 90°~100°.

[0012] Optionally, along the smoke flow direction, the interval L between two adjacent ventilation openings is 1450 cm to 1550 cm.

[0013] A second aspect of the present disclosure is a sampling tube assembly, comprising:

[0014] Two sampling tubes according to the above, the two sampling tubes are arranged in parallel; and

[0015] The purge component includes a positive pressure air source and a negative pressure air source, the positive pressure air source is connected to one of the two sampling tubes, and the negative pressure air source is connected to the other of the two sampling tubes.

[0016] Optionally, the sampling port includes:

[0017] A first sampling port is provided at the midstream of one of the two sampling tubes and is connected to the positive pressure gas source; and

[0018] The second sampling port is arranged in the middle of the other one of the two sampling tubes and is connected to the negative pressure gas source.

[0019] Optionally, the sampling tube assembly further includes a regulating device for adjusting the pressure and flow of the purge air.

[0020] According to a third aspect of the present disclosure, a thermal measurement system is provided, comprising the sampling tube assembly described above.

[0021] The aforementioned technical solution, by constructing the tube body into a wavy structure, helps reduce the deposition of particulate matter in the flue gas within the tube, lowering the risk of clogging the sampling tube. Furthermore, the V-shaped tube design effectively guides the flue gas flow, allowing for thorough mixing as it passes through the sampling tube, thereby improving the representativeness and accuracy of the sampling. Furthermore, the sampling port and ventilation opening are located at the crests and troughs of the wavy structure, respectively, helping to enhance the convenience and reliability of flue gas sampling.

[0022] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0024] Figure 1 This is a diagram of the partial structure and usage state of a sampling tube assembly provided by an exemplary embodiment of the present disclosure;

[0025] Figure 2 1 is a diagram showing the partial structure and usage of a sampling tube assembly provided by another exemplary embodiment of the present disclosure.

[0026] Description of Reference Numerals

[0027] 11-tube body; 111-V-shaped tube; 12-ventilation port; 13-sampling port; 131-first sampling port; 132-second sampling port; 141-first sampling tube; 142-second sampling tube; 151-first connecting tube; 152-second connecting tube; 10-sampling tube; 20-flue. DETAILED DESCRIPTION

[0028] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0029] In the present disclosure, unless otherwise stated, directional words such as "inside" and "outside" refer to the outline of the corresponding parts themselves; directional words such as "horizontal" and "vertical" are defined based on the usage habits of the heater provided by the present disclosure. Specifically, please refer to Figure 1 In the drawings shown, the Z direction refers to the vertical direction and the height of the wave structure, and the X direction refers to the horizontal direction and the direction of smoke flow. Terms such as "first" and "second" used in this disclosure are intended to distinguish one element from another and do not imply order or importance. In addition, in the following description, when referring to the drawings, the same reference numerals in different drawings indicate the same or similar elements.

[0030] Reference Figure 1 and Figure 2The present disclosure provides a sampling tube, which may include a tube body 11, a vent 12, and a sampling port 13. The tube body 11 may include multiple sections of V-shaped tubes 111, which may be sequentially connected along the direction of smoke flow to form a wave structure. The bent ends of the V-shaped tubes 111 may form the crests of the wave structure, and the two ends of the openings of the V-shaped tubes 111 may form the troughs of the wave structure. It should be noted that the opening refers to the opening of the V-shaped cross section of the V-shaped tube 111. Such a design may allow the smoke to be deflected multiple times during its flow in the tube body 11, so that particulate matter in the smoke can be fully mixed with the smoke and can flow with the flow of the smoke to be discharged to the outside of the tube body 11, effectively preventing particulate matter in the smoke from being deposited in the sampling tube 10 and causing blockage of the sampling tube 10, thereby ensuring the long-term and effective use of the sampling tube 10. The tube body 11 is connected to the flue 20 at both ends along the flue gas flow direction, ensuring that the flue gas flow direction within the tube body 11 is approximately parallel to that within the flue 20. This improves the flue gas guidance effect, optimizes the airflow distribution, and enhances the representativeness and accuracy of the sampling. The vents 12 can be formed at the troughs of the wave pattern and can be used to connect with the flue 20. This effectively improves the overall effect of the sampling tube 10 and the flue 20 and facilitates the flow of flue gas between the flue 20 and the sampling tube 10. The sampling port 13 can be formed at the crests of the wave pattern to connect with a measuring device (not shown). Since the flue gas is deflected at the crests, the sample can reflect the real-time state of the flue gas, avoiding sample distortion caused by improper positioning, thereby helping to improve measurement reliability. In the embodiments provided herein, the tube body 11 can flexibly adjust the number, length, and orientation of the V-shaped tubes 111 according to actual needs to adapt to different installation environments and measurement requirements, thereby enhancing the applicability of the sampling tube 10.

[0031] The above technical solution, by constructing the tube body 11 into a wavy structure, helps reduce the deposition of particulate matter in the flue gas within the tube, reducing the risk of clogging of the sampling tube. Furthermore, the V-shaped tube design effectively guides the flow of flue gas, allowing for thorough mixing of the flue gas as it passes through the sampling tube 10, thereby improving the representativeness and accuracy of the sampling. Furthermore, the sampling port 13 and the ventilation port are positioned at the crest and trough of the wavy structure, respectively, helping to improve the convenience and reliability of flue gas sampling.

[0032] Reference Figure 1 and Figure 2The height direction of the wave crest and the wave trough can be perpendicular to the direction of smoke flow. For example, the smoke can flow in the horizontal direction, and the height direction of the wave crest and the wave trough can be the vertical direction. Such a design can effectively reduce the flow resistance of the smoke when passing through the sampling tube 10, avoid the air flow deceleration caused by excessive flow resistance, thereby ensuring the timeliness and effectiveness of sampling, and at the same time can reduce the vibration and deformation caused by the smoke flow, and improve the service life and reliability of the sampling tube 10.

[0033] Reference Figure 1 The sampling tube 10 also includes a first connecting tube 141, one end of which can be connected to the sampling port 13, and the other end can extend in a direction away from the tube body 11 and be connected to the measuring device. On the one hand, it facilitates the communication between the sampling port 13 and the measuring device, and on the other hand, it can increase the interval between the measuring device and the sampling tube 10, thereby avoiding related interference between components, avoiding adverse risks to other components caused by component failure or smoke leakage, and improving safety. According to the embodiment provided by the present disclosure, the first connecting tube 141 can be detachably connected to the measuring device and the sampling port 13, respectively, so that the operator can more conveniently maintain or replace the first connecting tube 141 without affecting other parts of the sampling tube 10.

[0034] Reference Figure 1 The number of sampling ports 13 can be multiple, and the multiple sampling ports 13 are formed at multiple peaks respectively. The number of first connecting tubes 141 is multiple and matches the number of sampling ports 13. One end of each first connecting tube 141 is connected to the corresponding sampling port 13, and the other end is connected to the measuring device. By setting up sampling ports 13 at each peak, the status of multiple peaks can be monitored simultaneously, and more comprehensive flue gas data can be obtained. In addition, by connecting the independent first connecting tubes 141 to the measuring device, cross interference can be reduced and the accuracy and reliability of the measurement can be improved. Multiple first connecting tubes 141 are connected to the same detection device, so that multiple samples can be detected simultaneously and in a timely manner, thereby improving the monitoring accuracy of the samples.

[0035] Further, refer to Figure 1 In the embodiment provided in the present disclosure, the sampling tube 10 may further include a first connecting tube 151 connected between the first connecting tube 141 and the measuring device. The number of the first connecting tubes 151 can match the number of the first connecting tubes 141. One ends of the multiple first connecting tubes 151 can be respectively connected to the first connecting tubes 141 corresponding thereto, and the other ends of the multiple first connecting tubes 151 can be commonly connected to the measuring device, thereby further reducing the difficulty of arranging the components, improving the safety and stability of the components during use, and facilitating the measuring device to receive and measure the sample.

[0036] Reference Figure 1According to the embodiment provided in the present disclosure, the bending angle α of the V-tube 111 can be 90°~100°, preferably 96°, so as to effectively change the flow direction of the flue gas and increase the number of deflections of the airflow, thereby promoting the mixing and uniform distribution of the flue gas and particulate matter, so as to ensure the accuracy of sampling.

[0037] Reference Figure 1 Along the direction of smoke flow, the spacing L between two adjacent ventilation openings 12 is 1450 cm to 1550 cm, preferably 1500 cm. Appropriate spacing ensures even distribution of smoke during circulation, avoids excessive concentration or sparseness of airflow in localized areas, reduces safety hazards caused by excessive airflow concentration, and ensures the stability and safety of the sampling tube 10 during high-load operation. Furthermore, reasonable spacing facilitates smoke sampling at different locations, enabling a more comprehensive reflection of changes in smoke composition and concentration, ensuring the accuracy and representativeness of the monitoring data.

[0038] According to the second aspect of the present disclosure, referring to Figure 1 and Figure 2 , a sampling tube assembly is also provided, which can include two sampling tubes 10 and a purge assembly according to the above description, and the sampling tube assembly can have all the beneficial effects of the sampling tube 10 provided by the present disclosure, which will not be repeated here. In the sampling tube assembly provided by the present disclosure, the two sampling tubes 10 can be arranged in parallel, so that the measuring equipment can perform flue gas detection from the same position of different pipelines at the same time, which is convenient for data analysis and comparison, and ensures the representativeness and accuracy of the collected samples. The purge component includes a positive pressure air source and a negative pressure air source, the positive pressure air source is connected to one of the two sampling tubes 10, and the negative pressure air source is connected to the other of the two sampling tubes 10. The positive pressure air source can push fresh flue gas into the sampling tube 10, while the negative pressure air source can extract the old flue gas in the tube. Through the mutual cooperation of the positive pressure air source and the negative pressure air source, the real-time performance of flue gas sampling is improved, and the blockage in the sampling tube 10 is further avoided.

[0039] Reference Figure 1The sampling port 13 may include a first sampling port 131 and a second sampling port 132. The first sampling port 131 may be arranged in the middle of one of the two sampling tubes 10 and connected to the positive pressure gas source, and the second sampling port 132 may be arranged in the middle of the other of the two sampling tubes 10 and connected to the negative pressure gas source. By arranging the first sampling port 131 and the second sampling port 132 in the middle of the two sampling tubes 10 respectively, the smoke components in the middle of the pipe can be effectively captured, avoiding the problem of uneven samples caused by the sampling point being too close to the air inlet or outlet. In addition, the positive pressure gas source and the negative pressure gas source are respectively connected to the sampling ports 13 of the two sampling tubes 10, which can maintain the fluidity of the smoke in the tube during sampling, ensure the continuity and freshness of the smoke during the sampling process, and avoid affecting the sampling results due to the retention of static smoke. Through reasonable gas source configuration, safety hazards caused by smoke leakage or abnormal pressure can be effectively prevented, thereby enhancing the safety and reliability of the sampling tube assembly. In addition, by providing two sampling ports 13 , different sampling modes (positive pressure or negative pressure) can be selected as needed, so that the sampling tube assembly can adapt to different working environments and sampling requirements, thereby enhancing the flexibility of the sampling tube assembly.

[0040] Further, refer to Figure 1 When the sampling tube 10 provided by the present disclosure includes the first connecting tube 141 mentioned above, the sampling tube assembly may also include two second connecting tubes 142 and two second connecting tubes 152. The two second connecting tubes 142 can be connected in parallel with the two first connecting tubes 141 corresponding to the first sampling port 131 and the second sampling port 132, respectively. The other ends of the two second connecting tubes 142 can be connected to one end of the two second connecting tubes 152, respectively. The other ends of the two second connecting tubes 152 can be connected to the positive pressure gas source and the negative pressure gas source, respectively, thereby reducing the difficulty of assembly between components and improving the stability of the smoke circulation process.

[0041] According to embodiments provided herein, the sampling tube assembly may further include a regulating device for adjusting the pressure and flow of the purge air. By adjusting the pressure and flow of the purge air, the sampling process can be optimized based on specific sampling requirements and environmental conditions. This helps ensure the accuracy and reliability of sampling. Furthermore, the purge air can have different airflow rates and pressures depending on the application scenario. The regulating device provides flexibility, allowing the sampling tube assembly to adapt to a variety of operating conditions.

[0042] The third aspect of the present disclosure further provides a thermal measurement system, including the sampling tube assembly described above. The thermal measurement system has all the beneficial effects of the sampling tube assembly provided by the present disclosure, which will not be described in detail here.

[0043] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0044] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0045] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A sampling tube, characterized in that: include: A pipe body, the pipe body comprising a plurality of V-shaped pipes sequentially connected and arranged along the direction of smoke flow to form a wave structure, wherein the bent ends of the V-shaped pipes form the crests of the wave structure, and the two ends where the V-shaped pipes are opened form the troughs of the wave structure, and the two ends of the pipe body along the direction of smoke flow are respectively connected to the flue; a vent formed at the trough for communicating with the flue; and A sampling port is formed at the wave crest and is used for communicating with a measuring device.

2. The sampling tube according to claim 1, characterized in that The height directions of the wave crest and the wave trough are perpendicular to the smoke flow direction.

3. The sampling tube according to claim 1, characterized in that: The sampling tube further includes a first connecting tube, one end of which is connected to the sampling port, and the other end of which extends in a direction away from the tube body and is connected to the measuring device.

4. The sampling tube according to claim 3, characterized in that There are multiple sampling ports, and the multiple sampling ports are respectively formed at multiple wave peaks. There are multiple first connecting tubes and they match the number of the sampling ports. One end of each of the first connecting tubes is connected to the corresponding sampling port, and the other end is connected to the measuring device.

5. The sampling tube according to claim 1, characterized in that: The bending angle α of the V-shaped tube is 90° to 100°.

6. The sampling tube according to claim 1, characterized in that Along the smoke flow direction, the interval L between two adjacent ventilation openings is 1450cm~1550cm.

7. A sampling tube assembly, characterized in that: include: Two sampling tubes according to any one of claims 1 to 6, the two sampling tubes being arranged in parallel; and The purge component includes a positive pressure air source and a negative pressure air source, the positive pressure air source is connected to one of the two sampling tubes, and the negative pressure air source is connected to the other of the two sampling tubes.

8. The sampling tube assembly according to claim 7, characterized in that The sampling port includes: A first sampling port is provided at the midstream of one of the two sampling tubes and is connected to the positive pressure gas source; and The second sampling port is arranged in the middle of the other one of the two sampling tubes and is connected to the negative pressure gas source.

9. The sampling tube assembly according to claim 7, characterized in that: The sampling tube assembly further comprises a regulating device for regulating the pressure and flow of the purge air.

10. A thermal measurement system, characterized in that: The method comprises the sampling tube assembly according to any one of claims 7 to 9.

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