Flue gas sampling device and flue gas sampling system

Abstract

The utility model relates to the field of flue gas sampling, and discloses a flue gas sampling device and a flue gas sampling system.The flue gas sampling device comprises a sampling pipe body, a laser range finder and a driving assembly in transmission connection with the sampling pipe body, the laser range finder can measure the width of a flue gas pipeline so as to determine the position of each sampling point; the driving assembly is in signal connection with the laser range finder so as to drive the sampling pipe body to move in the width direction of the flue gas pipeline according to a signal fed back by the laser range finder, so that the sampling hole of the sampling pipe body extends into the sampling point. The width of the flue gas pipeline is measured through the laser range finder so as to determine the position of a sampling point, the laser range finder is in signal connection with the driving assembly for driving the sampling pipe body to move, a data signal measured by the laser range finder is fed back to the driving assembly, and the sampling pipe body is controlled to accurately move to each sampling point. The sampling pipe body does not need to be manually held to different measuring points of the flue, so that the accuracy of a measuring result is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of smoke sampling, in particular to a smoke sampling device and a smoke sampling system. Background Art

[0002] In the process of thermal power generation, the analysis and measurement of boiler flue gas oxygen content, carbon dioxide content, carbon monoxide content and flue gas temperature are of great significance for guiding boiler combustion control, and are also important parameters reflecting the economic performance and environmental performance of the boiler. Therefore, it is essential to measure the boiler flue gas composition and temperature regularly.

[0003] At present, most of the sampling and testing of flue gas is done by extending the sampling smoke gun into the flue. Usually, the flue is first divided into measuring points according to its cross-sectional dimensions using the grid method, and then the sampling tube is extended to different measuring points of the flue for testing. However, the tester needs to hold the sampling tube and extend it into the measuring point of the flue. Due to the weight of the sampling tube itself and the large number of measuring points, it is generally difficult to find the center point, resulting in deviations in the measurement results.

[0004] Therefore, it is urgent to propose a corresponding solution to the problem that when manually holding the sampling tube to different measuring points in the flue, it is impossible to accurately find the center point, which easily causes deviations in the measurement results. Utility Model Content

[0005] The utility model aims to overcome the problem in the prior art that when manually holding a sampling tube to different measuring points of a flue, the center point cannot be accurately found, which easily causes deviation in the measuring result.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a flue gas sampling device on one hand, including a sampling tube body, a laser rangefinder and a driving component connected to the sampling tube body by transmission, wherein the laser rangefinder can measure the width of the flue gas duct and thus determine the position of each sampling point, and the driving component is connected to the laser rangefinder signal so as to drive the sampling tube body to move along the width direction of the flue gas duct according to the signal fed back by the laser rangefinder, so that the sampling hole of the sampling tube body extends to the sampling point.

[0007] In some embodiments, a spiral groove is formed on the tube wall of the sampling tube body, and the driving assembly includes a motor and a worm gear coaxially connected to the output shaft of the motor, and the worm gear is engaged with the spiral groove to drive the sampling tube body to expand and contract relative to the flue gas duct when the worm gear is driven to rotate.

[0008] In some embodiments, it also includes a shell that is detachably connected to the side wall of the smoke duct, the shell is provided with a through hole, the side wall of the smoke duct is provided with a smoke hole, and the sampling tube body passes through the through hole and the smoke hole in sequence and extends into the smoke duct.

[0009] In some embodiments, a rubber sleeve is provided on one side of the shell, the rubber sleeve is provided around the sampling tube body, and the rubber sleeve is adapted to the aperture of the smoke hole.

[0010] In some embodiments, a receiving space is formed between the rubber sleeve and the sampling tube body, and the laser rangefinder is disposed in the receiving space.

[0011] In some embodiments, a gasket is provided between the shell and the side wall of the smoke duct, the shell has a cavity, and the drive assembly is installed in the cavity.

[0012] In some embodiments, a single chip microcomputer is also included that is signal-connected to both the laser rangefinder and the drive component, so that the signal fed back by the laser rangefinder can be fed back to the drive component after calculation.

[0013] In some embodiments, a thermocouple is connected to one side of the sampling hole.

[0014] In some embodiments, the sampling tube body is made of heat-resistant and corrosion-resistant material.

[0015] The second aspect of the utility model provides a flue gas sampling system, comprising a flue gas analyzer and the above-mentioned flue gas sampling device, wherein the flue gas analyzer is connected to the end of the sampling tube body.

[0016] In the above technical solution, the width of the flue gas duct is measured by a laser rangefinder and the position of each sampling point is determined by calculation, and the laser rangefinder is connected to the signal of the driving component that drives the sampling tube body to move along the flue. The laser rangefinder is used to feed back the signal to the driving component, thereby controlling the sampling tube body to move accurately to each sampling point. There is no need to manually hold the sampling tube body to different measuring points in the flue, and the position of each sampling point can be accurately found, thereby improving the accuracy of the measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an implementation mode of the smoke sampling device disclosed in the utility model.

[0018] Description of Reference Numerals

[0019] 1 Sampling tube body 2 Laser rangefinder

[0020] 3 Drive assembly 31 Output shaft

[0021] 32 Worm gear 4 spiral groove

[0022] 5 Shell 51 Cavity

[0023] 6 Rubber sleeve 7 Smoke hole

[0024] 8 Gasket 9 MCU

[0025] 10 Thermocouple DETAILED DESCRIPTION

[0026] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0027] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0028] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0029] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0030] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0031] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0032] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0033] In order to overcome the problem in the prior art that the center point cannot be accurately found when manually holding the sampling tube to different measuring points in the flue, which easily causes deviation in the measurement results, Figure 1 As shown, on one hand, the utility model provides a flue gas sampling device, comprising a sampling tube body 1, a laser rangefinder 2 and a driving component 3 which is transmission-connected to the sampling tube body 1, wherein the laser rangefinder 2 can measure the width of the flue gas duct and thus determine the position of each sampling point, and the driving component 3 is signal-connected to the laser rangefinder 2 so as to drive the sampling tube body 1 to move along the width direction of the flue gas duct according to the signal fed back by the laser rangefinder 2, so that the sampling hole of the sampling tube body 1 extends to the sampling point.

[0034] Specifically, the laser rangefinder 2 can measure the width of the flue gas duct, and then determine the position of each sampling point through calculation. At the same time, the laser rangefinder 2 can be connected to the signal of the driving component 3 that drives the sampling tube body 1 to move along the flue gas duct, and the data signal measured by the laser rangefinder 2 can be fed back to the driving component 3, so that the driving component 3 can be used to control the sampling tube body 1 to move accurately to each sampling point. There is no need to manually hold the sampling tube body 1 to different measuring points in the flue, and the position of each sampling point can be accurately found, thereby improving the accuracy of the measurement results.

[0035] Wherein, in some embodiments, Figure 1As shown, a spiral groove 4 is formed on the tube wall of the sampling tube body 1, and the driving assembly 3 includes a motor and a worm gear 32 coaxially connected to the output shaft 31 of the motor. The worm gear 32 is engaged with the spiral groove 4 to drive the sampling tube body 1 to expand and contract relative to the flue gas duct when the worm gear 32 is driven to rotate.

[0036] Specifically, combined Figure 1 As shown, the spiral groove 4 on the wall surface of the sampling tube body 1 is meshed with the worm wheel 32, and the driving turbine 32 to rotate can drive the sampling tube body 1 to move in the direction in which the spiral groove 4 extends, that is, when the motor drives the turbine 3 to rotate, it can drive the sampling tube body 1 meshed with it to expand and contract relative to the flue gas duct, so that the sampling tube body 1 can be extended into the flue gas duct. In addition, according to the rotation angle and number of turns of the turbine 3, the length of the expansion and contraction of the sampling tube body 1 can be controlled. Therefore, the rotation angle and number of turns of the turbine 3 can be controlled by the motor, and then the sampling tube body 1 can be controlled to accurately extend to the position of the designated sampling point.

[0037] Wherein, in some embodiments, combined Figure 1 As shown, it also includes a shell 5 detachably connected to the side wall of the smoke duct, the shell 5 is provided with a through hole, the side wall of the smoke duct is provided with a smoke hole 7, and the sampling tube body 1 passes through the through hole and the smoke hole 7 in sequence and extends into the smoke duct.

[0038] Specifically, refer to Figure 1 As shown, the shell 5 can be detachably connected to the side wall of the flue gas duct. At the same time, the shell 5 is provided with a through hole allowing the sampling tube body 1 to pass through, so as to support the sampling tube body 1. There is no need to manually hold the sampling tube body 1, which saves labor. At the same time, it can ensure that the sampling tube body 1 is horizontally moved to the position of the designated sampling point, avoiding the tilting and displacement of the sampling tube body 1 due to its own gravity during the manual movement, thereby causing measurement errors.

[0039] Further, refer to Figure 1 As shown, a rubber sleeve 6 is provided on one side of the housing 5, and the rubber sleeve 6 is provided around the sampling tube body 1, and the rubber sleeve 6 is adapted to the aperture of the smoke hole 7. It can be understood that the rubber sleeve 6 can be inserted into the smoke hole 7, and there is no gap between the two, ensuring that during the smoke sampling process, the smoke will not leak from the smoke hole 7, and can cooperate with the housing 5 to prevent the sampling tube body 1 from moving downward.

[0040] At the same time, if Figure 1As shown, a storage space is formed between the rubber sleeve 6 and the sampling tube body 1, and the laser rangefinder 2 can be arranged in the storage space. This arrangement allows the laser rangefinder 2 to be arranged in the flue gas duct, so as to measure the width data of the flue gas duct. Among them, the storage space can be adapted to the laser rangefinder 2 so that the laser rangefinder 2 can be fixed in the storage space. Of course, the laser rangefinder 2 can also be connected to the gasket 8 (to be introduced below) or the housing 5, as long as the laser rangefinder 2 can be ensured to be fixed.

[0041] Wherein, in some embodiments, reference Figure 1 As shown, a gasket 8 is provided between the housing 5 and the side wall of the smoke duct, the housing 5 has a cavity 51, and the drive assembly 3 is installed in the cavity 51. It can be understood that the gasket 8 can be connected to the rubber sleeve 6. When the rubber sleeve 6 is inserted into the smoke hole 7, the gasket 8 can be tightly attached to the side wall of the smoke duct, thereby fixing the housing 5 and ensuring that the housing 5 is evenly stressed. In addition, the drive assembly 3 can be installed in the cavity 51 of the housing 5 to avoid being exposed to the outside and causing damage. At the same time, the data line station connecting the laser rangefinder 2, the drive assembly 3 and the single-chip computer 9 (to be introduced below) can be placed in the cavity 51.

[0042] Wherein, in some embodiments, Figure 1 As shown, it also includes a single chip microcomputer 9 which is signal-connected to both the laser rangefinder 2 and the driving component 3 so as to be able to calculate and feed back the signal fed back by the laser rangefinder 2 to the driving component 3 .

[0043] Specifically, the single chip microcomputer 9 is connected to the laser rangefinder 2 and the drive component 3 through data line signals. When the laser rangefinder 2 measures the width and distance of the flue gas duct, the data is transmitted to the single chip microcomputer 9. The single chip microcomputer 9 can calculate the position of each sampling point, and after analysis and processing, it can output the distance information data that the sampling tube body 1 needs to extend into the flue gas duct until it reaches the sampling point to the drive component 3, so that the drive component 3 controls the sampling tube body 1 to extend into the designated sampling point for sampling. Such a setting can ensure that the sampling tube body 1 accurately reaches the designated position and improve the accuracy of the measurement results.

[0044] Wherein, in some embodiments, Figure 1 As shown, a thermocouple 10 is connected to one side of the sampling hole to measure the temperature of the flue gas when the flue gas is sampled.

[0045] Wherein, in some embodiments, Figure 1 As shown, the sampling tube body 1 can be made of heat-resistant and corrosion-resistant material to prevent the flue gas temperature in the flue gas duct from being too high, causing adverse effects such as melting and corrosion of the sampling tube body 1.

[0046] The second aspect of the utility model provides a flue gas sampling system, comprising a flue gas analyzer and the above-mentioned flue gas sampling device, wherein the flue gas analyzer is connected to the end of a sampling tube body 1. Specifically, one end of the sampling tube body 1 extends into the flue gas duct, and the other end is connected to the flue gas analyzer, and the flue gas in the flue gas duct is sucked out through the sampling tube body 1, and the components are detected by the flue gas analyzer.

[0047] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0048] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A flue gas sampling device, characterized in that: The invention comprises a sampling tube body (1), a laser rangefinder (2), and a driving component (3) which is transmission-connected to the sampling tube body (1), wherein the laser rangefinder (2) can measure the width of the flue gas duct and thus determine the position of each sampling point, and the driving component (3) is signal-connected to the laser rangefinder (2) so as to drive the sampling tube body (1) to move along the width direction of the flue gas duct according to the signal fed back by the laser rangefinder (2), so that the sampling hole of the sampling tube body (1) extends into the sampling point.

2. The smoke sampling device according to claim 1, characterized in that: A spiral groove (4) is formed on the tube wall of the sampling tube body (1), and the driving assembly (3) comprises a motor and a worm gear (32) coaxially connected to an output shaft (31) of the motor, wherein the worm gear (32) is meshed with the spiral groove (4) so ​​as to drive the sampling tube body (1) to expand and contract relative to the flue gas duct when the worm gear (32) is driven to rotate.

3. The smoke sampling device according to claim 1, characterized in that: It also includes a shell (5) detachably connected to the side wall of the smoke duct, the shell (5) is provided with a through hole, the side wall of the smoke duct is provided with a smoke hole (7), and the sampling tube body (1) passes through the through hole and the smoke hole (7) in sequence and extends into the smoke duct.

4. The smoke sampling device according to claim 3, characterized in that: A rubber sleeve (6) is provided on one side of the shell (5), the rubber sleeve (6) is arranged around the sampling tube body (1), and the rubber sleeve (6) is adapted to the aperture of the smoke hole (7).

5. The smoke sampling device according to claim 4, characterized in that: An accommodation space is formed between the rubber sleeve (6) and the sampling tube body (1), and the laser rangefinder (2) is arranged in the accommodation space.

6. The smoke sampling device according to claim 3, characterized in that: A gasket (8) is provided between the shell (5) and the side wall of the smoke duct; the shell (5) has a cavity (51); and the drive assembly (3) is installed in the cavity (51).

7. The smoke sampling device according to claim 1, characterized in that: It also includes a single chip computer (9) which is signal-connected to both the laser rangefinder (2) and the drive assembly (3), so as to be able to calculate and feed back the signal fed back by the laser rangefinder (2) to the drive assembly (3).

8. The smoke sampling device according to any one of claims 1 to 7, characterized in that: A thermocouple (10) is connected to one side of the sampling hole.

9. The smoke sampling device according to claim 1, characterized in that: The sampling tube body (1) is made of heat-resistant and corrosion-resistant material.

10. A flue gas sampling system, characterized in that: It comprises a flue gas analyzer and a flue gas sampling device according to any one of claims 1 to 9, wherein the flue gas analyzer is connected to the end of the sampling tube body (1).

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