A distributed flue measurement device

Abstract

The present invention relates to the field of flue gas measurement technology, and discloses a distributed flue gas measurement device, comprising a first mounting plate, a plurality of air ducts, and a plurality of ultrasonic detection units; the first mounting plate is rectangular or circular, and a plurality of first air holes are provided inside the first mounting plate to form honeycomb-shaped holes; a plurality of air ducts in contact with and connected to the rear side wall of the first mounting plate are provided on the rear side of the first mounting plate, and each air duct is provided corresponding to one of the first air holes; each of the ultrasonic detection units is provided on the inner wall of the corresponding air duct. The distributed flue gas measurement device, by providing a plurality of air ducts, each of which is of modular design and can be independently calibrated, aggregates the ultrasonic detection units in all areas through bus connection, and comprehensively optimizes and integrates the data of each measurement flow channel through an integrator, thereby achieving high-precision and high-reliability flow measurement of the entire smoke corridor flow.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas measurement, in particular to a distributed flue gas measurement device. Background Art

[0002] To achieve the dual carbon goals, we must start from two aspects: one is to control carbon emissions, and the other is to increase carbon absorption. Carbon emissions need to be measured from the above two aspects, and the measurement method, accuracy, and applicable instruments are very important. For this purpose, a distributed flue measurement device is designed. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the present invention provides a distributed flue measurement device which has the advantages of being easy to carry and install on site, and effectively solves the calibration and traceability problem of measuring instruments.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a distributed flue measurement device includes a first mounting plate, a plurality of air ducts, and a plurality of ultrasonic detection units;

[0005] The first mounting plate is rectangular or circular, and a plurality of first air holes are opened inside the first mounting plate to form honeycomb-shaped holes; a plurality of air ducts are provided on the rear side of the first mounting plate and are in contact with and connected to the rear side wall of the first mounting plate, and each air duct is provided corresponding to one of the first air holes; each of the ultrasonic detection units is respectively provided on the inner wall of the corresponding air duct.

[0006] By adopting the above technical solution and utilizing multiple air ducts, the needs of multi-point measurement can be met, the gas flow channel inside the smoke gallery or chimney can be divided into multiple effective metering areas, and distributed metering is performed using independent gas measurement channels. Flow synthesis is performed through a scientific mathematical model, thereby enabling accurate measurement of the overall flow. At the same time, the ultrasonic detection unit installed inside each air duct can be disassembled and calibrated independently, and the entire duct can also be calibrated.

[0007] Preferably, the distributed flue gas measuring device further comprises a second mounting plate (2) and a third mounting plate, the bottom of the first mounting plate being symmetrically fixedly connected to two connecting rods and being fixedly connected to the third mounting plate via the two connecting rods, a connecting mechanism being provided between the first mounting plate and the second mounting plate and being transmission-connected via the connecting mechanism, a plurality of second air holes being provided inside the second mounting plate, each of the air ducts being movably passed through the interior of the corresponding second air hole, the outer wall of each of the air ducts being symmetrically fixedly connected to two blocks, each of the blocks being in contact with the side wall of the second mounting plate, the upper surface of the third mounting plate being symmetrically provided with two groups of first driving mechanisms, each group of the first driving mechanisms being provided with two, and each of the first driving mechanisms being transmission-connected with a clamping mechanism.

[0008] Preferably, the connecting mechanism includes two telescopic rods, the side walls of the first mounting plate are symmetrically fixedly connected with two first fixed blocks, the side walls of the second mounting plate are symmetrically fixedly connected with two second fixed blocks, the two telescopic rods are respectively fixedly connected between the corresponding first fixed blocks and the second fixed blocks, and the rod walls of the two telescopic rods are both sleeved with an extrusion mechanism.

[0009] By adopting the above technical solution and utilizing the provided connection mechanism, the connection between the first mounting plate and the second mounting plate can be achieved, and multiple air ducts can be fixedly installed to facilitate the detection of the smoke flow in the smoke gallery.

[0010] Preferably, the first driving mechanism includes a first fixed plate, a screw rod and an internal threaded sleeve, the first fixed plate is fixedly connected to the surface of the third mounting plate, one end of the screw rod has a rod wall rotatably connected to the side wall of the first fixed plate, the internal threaded sleeve is threadedly sleeved on the rod wall of the screw rod, the outer wall of one end of the internal threaded sleeve away from the first fixed plate is transmission connected to the corresponding clamping mechanism, two second driving mechanisms are symmetrically arranged on the surface of the third mounting plate, one end of the screw rod passes through the first fixed plate and is fixedly connected to the first bevel gear, and the first bevel gear is transmission connected to the corresponding second driving mechanism.

[0011] By adopting the above technical solution, the first driving mechanism is used to drive the corresponding clamping mechanism to move, so that the entire measuring device can be fixedly installed after the first mounting plate and the second mounting plate are inserted into the smoke gallery.

[0012] Preferably, the clamping mechanism includes a first connecting plate and a second connecting plate, the first connecting plate is provided with a first strip opening inside, the first strip opening is movably sleeved inside a sliding rod, one end of the sliding rod is fixedly connected to the outer wall of the internal threaded sleeve and the other end of the rod wall is fixedly sleeved with an annular baffle, the second connecting plate is fixedly connected to the first connecting plate and provided with a second strip opening inside, an L-shaped rod is slidably provided inside the second strip opening, and the other end of the L-shaped rod is fixedly connected to the side wall of the third mounting plate.

[0013] By adopting the above technical solution and utilizing the provided snap-fit ​​mechanism, the entire device can be snap-fitted and fixed by matching with the third mounting plate after being inserted into the smoke gallery, thereby ensuring the normal progress of the measurement process.

[0014] Preferably, the squeezing mechanism includes a spring, the spring is movably connected to the rod wall of the corresponding telescopic rod, and both ends of the spring are fixedly connected to the side walls of the corresponding first fixed block and the second fixed block respectively.

[0015] By adopting the above technical solution and utilizing the provided spring, the first mounting plate and the second mounting plate can be pulled by the elastic force of the spring, thereby achieving the clamping and fixing of multiple air ducts to ensure the normal use of multiple ultrasonic detection units.

[0016] Preferably, the second driving mechanism includes a rotating rod and a second bevel gear, the rod wall at one end of the rotating rod is rotatably connected to the surface of the third mounting plate, the second bevel gear is fixedly connected to the end of the rotating rod away from the third mounting plate, the second bevel gear is meshed with the first bevel gear, the end of the rotating rod away from the second bevel gear passes through the third mounting plate and is fixedly connected to the worm gear, the surface of the mounting plate is provided with a third driving mechanism, and the third driving mechanism is transmission connected to the worm gear.

[0017] By adopting the above technical solution and utilizing the provided second driving mechanism, the first bevel gear can be driven to rotate while the rotating rod drives the second bevel gear to rotate, thereby driving the first driving mechanism.

[0018] Preferably, the third driving mechanism includes a worm and two second fixed plates, the two second fixed plates are symmetrically fixedly connected to the lower surface of the third mounting plate, the worm is rotatably connected between the two second fixed plates, and the worm is meshed with the worm wheel.

[0019] By adopting the above technical solution, the meshing connection between the worm and the worm wheel is utilized to drive the worm wheel to rotate during the rotation of the worm, thereby driving the rotating rod to drive the corresponding first driving mechanism to work.

[0020] Preferably, a clamping rod is fixedly connected to one side of the second connecting plate close to the third mounting plate, and a mounting groove is provided at the other end of the clamping rod, and a ball is rotatably provided inside the mounting groove.

[0021] By adopting the above technical solution and utilizing the two clamping rods, the friction between the ends of the two clamping rods and the inner wall of the smoke gallery can be reduced after the ends of the two clamping rods are in contact and engaged with the inner wall of the smoke gallery, thereby facilitating continued driving of the clamping rods to move.

[0022] Preferably, a sealing ring is fixedly connected to the upper surface of the third mounting plate.

[0023] By adopting the above technical solution and utilizing the provided sealing ring, the sealing effect between the third mounting plate and the smoke gallery can be effectively ensured to prevent smoke from drifting away.

[0024] Preferably, one end of the worm passes through the corresponding second fixing plate and is fixedly connected to a knob.

[0025] By adopting the above technical solution, the provided knob can be used to drive the worm to rotate during the process of rotating the knob, thereby driving the third driving mechanism.

[0026] Compared with the prior art, the present invention provides a distributed flue measurement device with the following beneficial effects:

[0027] 1. The distributed flue measurement device is equipped with multiple air ducts, each of which is modular in design and can be calibrated independently. The ultrasonic detection units in all areas are connected and aggregated through a bus, which truly reflects the complete flow measurement on the gas flow channel section of the smoke gallery or chimney. The integrator optimizes and integrates the data of each measurement flow channel to achieve high-precision and high-reliability flow measurement of the entire smoke gallery.

[0028] 2. The distributed flue measuring device, by providing a first drive mechanism, a second drive mechanism, a third drive mechanism and a clamping mechanism, can achieve fixed installation of the entire measuring device by cooperating with the third mounting plate after the first mounting plate and the second mounting plate are inserted into the interior of the smoke gallery or covered on the top of the chimney, thereby ensuring the normal progress of the measurement process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the principle of an ultrasonic flowmeter;

[0030] Figure 2 This is a structural schematic diagram of a distributed flue measurement device proposed by the present invention;

[0031] Figure 3 for Figure 1 A magnified view of the structure of part A in the middle;

[0032] Figure 4 for Figure 1 A magnified view of the structure of the middle part B;

[0033] Figure 5 1 is a schematic diagram of the connection structure between the mounting plate and the third driving mechanism as viewed from below;

[0034] Figure 6 This is a schematic diagram of the top view of the connection structure between the second mounting plate, the third mounting plate and multiple air ducts of a distributed flue measurement device proposed by the present invention.

[0035] In the figure: 1 first mounting plate, 2 second mounting plate, 3 third mounting plate, 4 ultrasonic detection unit, 5 connecting rod, 6 air duct, 7 block, 8 telescopic rod, 9 first fixing block, 10 second fixing block, 11 first fixing plate, 12 screw rod, 13 internal threaded sleeve, 14 first bevel gear, 15 first connecting plate, 16 second connecting plate, 17 sliding rod, 18 annular baffle, 19 L-shaped rod, 20 spring, 21 rotating rod, 22 second bevel gear, 23 worm gear, 24 worm, 25 second fixing plate, 26 clamping rod, 27 ball bearing, 28 sealing ring, 29 knob. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] Please refer to Figure 1 An ultrasonic flowmeter, equipped with an ultrasonic transducer, measures flow rate by utilizing the propagation characteristics of ultrasonic waves in fluids. An ultrasonic transducer, commonly known as a "probe," converts acoustic energy into electrical signals and vice versa.

[0038] The ultrasonic flowmeter is equipped with a pair of ultrasonic transducers, which alternately transmit and receive ultrasonic waves. By measuring the propagation time of high-frequency sound pulses, the downstream sound pulses are accelerated by the airflow, while the upstream sound pulses are decelerated. The propagation time difference is related to the average axial flow velocity of the gas. Therefore, numerical calculation technology is used to calculate the average axial flow velocity and flow rate of the gas passing through the gas ultrasonic flowmeter under working conditions.

[0039] As shown in Figure 1, assuming that the ultrasonic propagation distance between the two transducers is L, the angle between the ultrasonic propagation direction and the axis is θ, and the speed of sound of the ultrasonic wave in the static gas is c0, then when the gas flow rate in the pipeline is u, the sound speeds c1 and c2 of the ultrasonic wave propagating in the forward and reverse directions along the airflow are respectively:

[0040] (1)

[0041] (2)

[0042] Sound speed difference: (3)

[0043] (4)

[0044] The above formula is the basic principle expression of the time difference method flow measurement. In the formula, t1 and t2 are the acoustic time when the ultrasonic wave propagates in the forward direction and reverse direction respectively. 、 are the acoustic delays caused by circuits, cables, and transducers during forward and reverse propagation of ultrasound, respectively. As can be seen from the above formula, the velocity difference method offers significant advantages. The measured flow velocity u is independent of the medium's acoustic velocity c0 (i.e., its composition). This is highly advantageous for practical measurements in production settings.

[0045] Please refer to Figure 2 and Figure 6 The present application provides a distributed flue measurement device, comprising a first mounting plate 1, a plurality of air ducts 6 and a plurality of ultrasonic detection units 4; the first mounting plate 1 is rectangular or circular, and a plurality of first air holes are opened inside the first mounting plate 1 to form honeycomb-shaped holes; a plurality of the air ducts 6 in contact with and connected to the rear side wall of the first mounting plate 1 are arranged on the rear side of the first mounting plate 1, and each air duct 6 is arranged corresponding to one of the first air holes; each of the ultrasonic detection units 4 is respectively arranged on the inner wall of the corresponding air duct 6.

[0046] Optionally, each ultrasonic detection unit 4 is an ultrasonic flowmeter. The ultrasonic measurement of flue gas is to extend an ultrasonic flowmeter equipped with an ultrasonic transducer into the measured point of the flue through the flue sampling hole, and calculate the gas flow rate and the gas flow rate under standard conditions by measuring the sound velocity difference, pressure, temperature and humidity of the ultrasonic wave propagating in the forward and reverse directions of the airflow at the measured point. A pair of ultrasonic transducers can realize single-point measurement as a mono-channel flowmeter, and two or more can realize multi-point measurement as a multi-channel flowmeter. According to the distribution of the flue flow field, different positions can be selected for single-point or matrix distribution. All collected data are aggregated into the signal processing unit, and the flow rate of the flue gas passing through the measured cross-sectional area of ​​the entire flue is calculated by the flow integrator, and the relevant physical quantities are displayed. This system is a continuous monitoring system that continuously monitors the flue gas parameters (temperature, pressure, flow rate or flow, humidity) of a fixed source in real time.

[0047] From the measured gas flow rate in the pipeline, the instantaneous gas flow rate Q under working conditions can be obtained:

[0048] (5)

[0049] In the case of multiple points, it is necessary to combine the weight coefficient based on whether the flue is circular or square. In the formula, D is the pipe diameter, and it is converted into the instantaneous flow rate Q0 of the gas under standard working conditions:

[0050] (6)

[0051] Where P, T, and Z are the pressure, temperature, and compressibility factor of the gas under working conditions in the pipeline, respectively; P0, T0, and Z0 are the pressure, temperature, and compressibility factor of the gas under standard working conditions, respectively.

[0052] By integrating the instantaneous flow rates continuously measured on-site, the cumulative flow rate of the gas in the pipeline can be obtained. In actual applications, since the flow velocity within the pipeline cross section is not absolutely uniform and a certain flow field distribution exists, ultrasonic flowmeters fully consider the influence of this flow field distribution and make corrections for it. See Appendix A (Normative) for the output parameter calculation method.

[0053] Optionally, by real-time, continuous monitoring of the carbon dioxide concentration in fixed-source flue gas, combined with ultrasonic measurement of pipeline gas flow, pressure, temperature, and humidity, the cumulative carbon dioxide emissions are calculated internally by the integrator, forming a continuous carbon dioxide emission monitoring system, or CO2-CEMS for short. The use of ultrasonic flowmeters in multiple air ducts can meet the needs of multi-point measurement, dividing the gas flow path inside the smoke gallery or chimney into multiple effective metering areas. Using independent gas measurement flow channels for distributed metering, flow synthesis is performed through scientific mathematical models, thereby achieving accurate measurement of the overall flow rate. At the same time, the ultrasonic detection unit installed in each air duct can be easily disassembled for independent calibration and traceability, and the entire duct can also be calibrated and traced.

[0054] Alternatively, taking the measurement of chimneys or smoke corridors as an example, for each ultrasonic detection unit probe, the optional power supply is an external power supply of 9~24VDC, which can be powered by a 3.6V battery. Among the measurable gas medium parameters, the operating temperature range can be -30°C to +80°C, the SO2 concentration can be limited to 35g / m3, the measurable flow rate is limited to 0.2m / s~30m / s, the humidity environment is limited to less than <98%RH, and the ambient pressure is limited to 75kPa∽150kPa. The optional communication method for the ultrasonic detection unit probe can be selected from RS485, 4G, 5G, Bluetooth, WIFI, Ethernet, etc.

[0055] The general performance of the ultrasonic testing unit probe can at least meet the following requirements:

[0056] Resolution: 0.01 m / s;

[0057] Sampling interval: ≤1s;

[0058] Sound velocity deviation: ±0.5%.

[0059] For example, when measuring gas flow paths, prioritize representative sampling points. Prioritize easily accessible sampling locations. Prioritize convenient sampling locations. Prioritize safe and reliable sampling locations. Comply with relevant standard requirements for sampling points. Where permitted, strive to align with standard requirements. If inconsistencies exist or the locations of testing points cannot be changed, consider increasing the number of testing points.

[0060] Optionally, during the process of fixing the portable single-channel fluid measurement system, the air duct of the ultrasonic detection unit is arranged parallel to the gas flow direction of the chimney, so that the ultrasonic detection unit can accurately detect the gas flow at a preset angle.

[0061] For example, when the flow field is ideally uniform, single-point measurement and multi-point measurement have little effect on the error, but multi-point measurement can provide higher reliability. In the case of an uneven flow field, multi-point measurement can more accurately restore the flow field conditions of the gas flow channel in the flue than single-point measurement. Multi-point measurement is based on the distribution of the flue flow field, and different positions are selected for multi-point or matrix distribution, that is, two or more flow meters are installed to achieve multi-point measurement (also called multi-channel flow meters), and all collected data are summarized in the signal processing unit. The flow rate of the flue gas passing through the measured cross-sectional area is calculated by the flow integrator, and the relevant physical quantities are displayed. Optionally, if in the gas flow channel measurement of the flue, each measurement point can output the flow velocity separately, this is the advantage of the ultrasonic measurement module. In measuring the cross section of a gas flow channel, assuming the velocities at different measurement points are V1, V2, ..., Vn, the general case is (V1 + V2 + ... + Vn) / n = Vs, where Vs is the average velocity across the flue cross section, S is the cross-sectional area at the average velocity, and the operating cumulative quantity Qg = Vs * S. Qg is the operating instantaneous quantity, and Qb is the standard instantaneous quantity (Pb is 1 atmosphere, Tb is the standard condition at 20°C). The actual measured temperature is T1, and the pressure is P1. According to the gas state equation, Qb = P1 * Tb * Qg / (Pb * T1), and the standard cumulative quantity = Qb * time. The standard cumulative quantity can be accumulated by adding together the standard instantaneous quantities every second. Because each measurement point can be independent, the measured flow rate can be one or multiple, and each can be independently verified and calibrated.

[0062] Optionally, when calculating relevant physical quantities using the flow rates measured at different measurement points, the total flow rate of the gas flow channel cross section may be calculated using a mathematical average value (V1+V2+...+Vn) / n=Vs.

[0063] For example, during the sampling and detection of the chimney gas flow channel, the sampling position is preferably avoided in places that are dangerous for the detection personnel to operate. The sampling position is preferably selected in the vertical pipe section of the chimney, which can avoid the flue elbows and parts where the cross-section changes sharply. The sampling position is preferably set at a distance of not less than 6 times the diameter in the downstream direction of the elbow, valve, and reducer and not less than 3 times the diameter in the upstream direction of the above components (i.e. 3 times above and 6 times below). For a rectangular flue, its equivalent diameter D=2AB / (A+B). Where A and B are the side lengths. For gaseous pollutants, due to the relatively uniform mixing, the sampling position may not be restricted by the above regulations, but it is preferred to avoid the eddy current area. If the exhaust flow is measured at the same time, the sampling position can still be selected as above.

[0064] For example, for a circular flue, the flue can be divided into an appropriate number of honeycomb detection surfaces of similar area. When measuring with limited measurement points, each measurement point can be selected at the intersection of the centerline of each ring with equal area and two perpendicular diameter lines. One of the diameter lines is preferably located within the plane with the greatest expected concentration variation. For example, if the measurement point is behind an elbow, the diameter line is preferably located within the plane of the elbow. For flues that meet the requirements, only measurement points on the diameter line with the greatest expected concentration variation can be selected. For small flues with a diameter less than 0.3m and a relatively uniform and symmetrical flow velocity distribution that meets the requirements, the center of the flue can be used as the measurement point.

[0065] For example, for rectangular or square flues, the flue cross-section can be divided into an appropriate number of equal-sized blocks, with the center of each block serving as the measurement point. The number of blocks can be selected based on pre-set requirements. For flue cross-sectional areas less than 0.1 m², with a relatively uniform and symmetrical flow velocity distribution that meets the requirements, the center of the cross-section can be used as the measurement point.

[0066] For example, in order to ensure the quality of daily operation, each flow meter can be calibrated, maintained and verified regularly to ensure that the flow meter's measurement accuracy is maintained for a long time. A single flow meter can be maintained and calibrated by disassembly, assembly and verification. Optionally, for regular calibration, the flow meter equipment used for online continuous monitoring is zero-point calibrated at least once a year to ensure that the zero-point drift does not exceed ±1%. Optionally, for regular maintenance, it is to regularly check whether the inner cavity of the online flow meter and the ultrasonic transducer end have dirt deposits, wear or other damage that may affect the performance of the flow meter. Optionally, for regular verification, the flow meter equipment used for online continuous monitoring is calibrated at least once a month to ensure that its flow accuracy does not exceed ±1%. For example, the portable ultrasonic flow meter equipment used for reference experiments is sent to the national metrology administration for inspection at least once a year to ensure that its accuracy error meets national standards.

[0067] Batch calibration can be a regular calibration for multi-point flowmeters. For example, if there are multiple measurement points on the same chimney, a full-cycle batch calibration can be established based on the time gradient of the installation.

[0068] For example, when used in a circular gas flow channel such as a chimney, the first mounting plate 1 is designed as a whole to accommodate the circular gas flow channel of the chimney. Optionally, when installing the chimney, the circular distributed flue measurement device can be placed on the top of the chimney for ease of installation. By adding a measuring cap to the chimney, the installation and construction difficulty of the distributed flue measurement device is reduced, and subsequent verification, traceability, and inspection and calibration are also facilitated.

[0069] For example, when applied to a rectangular gas flow channel such as a chimney, the first mounting plate 1 is designed as a whole to be rectangular to adapt to the rectangular gas flow channel of the chimney.

[0070] See also Figure 2 and Figure 6 , a distributed flue measuring device includes a first mounting plate 1, a second mounting plate 2, a third mounting plate 3 and a plurality of ultrasonic detection units 4, the bottom of the first mounting plate 1 is symmetrically fixedly connected to two connecting rods 5 and is fixedly connected to the third mounting plate 3 through two connecting rods 5, a connecting mechanism is provided between the first mounting plate 1 and the second mounting plate 2 and is transmission-connected by the connecting mechanism, a plurality of first air holes are opened inside the first mounting plate 1, a plurality of second air holes are opened inside the second mounting plate 2, a plurality of air ducts 6 contacting and connected with the rear side wall of the first mounting plate 1 are provided on the rear side of the first mounting plate 1, each air duct 6 is movably passed through the interior of the corresponding second air hole, and the outer wall of each air duct 6 is symmetrically fixedly connected to two blocks 7, each Each block 7 is in contact with and connected to the side wall of the second mounting plate 2, and each ultrasonic detection unit 4 is respectively arranged on the inner wall of the corresponding air duct 6. Two groups of first drive mechanisms are symmetrically arranged on the upper surface of the third mounting plate 3, and each group of first drive mechanisms is provided with two. Each first drive mechanism is transmission-connected with a clamping mechanism. By utilizing the multiple air ducts 6, the needs of multi-point measurement can be met, and the gas flow channel inside the smoke gallery or chimney can be divided into multiple effective metering areas. Independent gas measurement flow channels are used for distributed metering, and flow synthesis is performed through a scientific mathematical model, thereby achieving accurate measurement of the overall flow. At the same time, the ultrasonic detection unit 4 installed inside each air duct 6 can be disassembled for independent calibration, and the entirety can also be calibrated.

[0071] See also Figure 2 and Figure 6The connecting mechanism includes two telescopic rods 8. The side walls of the first mounting plate 1 are symmetrically fixedly connected with two first fixed blocks 9, and the side walls of the second mounting plate 2 are symmetrically fixedly connected with two second fixed blocks 10. The two telescopic rods 8 are respectively fixedly connected between the corresponding first fixed blocks 9 and the second fixed blocks 10. The rod walls of the two telescopic rods 8 are both sleeved with an extrusion mechanism. By utilizing the set connecting mechanism, the connection between the first mounting plate 1 and the second mounting plate 2 can be achieved, and multiple air ducts 6 can be fixedly installed to facilitate the detection of smoke flow in the smoke gallery.

[0072] See also Figure 2-3 The first driving mechanism includes a first fixed plate 11, a screw rod 12 and an internal threaded sleeve 13. The first fixed plate 11 is fixedly connected to the surface of the third mounting plate 3. The rod wall at one end of the screw rod 12 is rotatably connected to the side wall of the first fixed plate 11. The internal threaded sleeve 13 is threadedly sleeved on the rod wall of the screw rod 12. The outer wall of the end of the internal threaded sleeve 13 away from the first fixed plate 11 is transmission connected to the corresponding clamping mechanism. Two second driving mechanisms are symmetrically arranged on the surface of the third mounting plate 3. One end of the screw rod 12 passes through the first fixed plate 11 and is fixedly connected to the first bevel gear 14. The first bevel gear 14 is transmission connected to the corresponding second driving mechanism. The first driving mechanism can be used to drive the corresponding clamping mechanism to move, so that the entire measuring device can be fixedly installed after the first mounting plate 1 and the second mounting plate 2 are inserted into the interior of the smoke gallery.

[0073] See also Figure 2 and Figure 4 The clamping mechanism includes a first connecting plate 15 and a second connecting plate 16. A first strip opening is opened inside the first connecting plate 15. A sliding rod 17 is movably sleeved inside the first strip opening. One end of the sliding rod 17 is fixedly connected to the outer wall of the internal threaded sleeve 13 and the other end of the rod wall is fixedly sleeved with an annular baffle 18. The second connecting plate 16 is fixedly connected to the first connecting plate 15 and a second strip opening is opened inside. An L-shaped rod 19 is slidably provided inside the second strip opening. The other end of the L-shaped rod 19 is fixedly connected to the side wall of the third mounting plate 3. By utilizing the provided clamping mechanism, the entire device can be inserted into the interior of the smoke gallery and then matched with the third mounting plate 3 to achieve clamping and fixing of the entire device to ensure the normal progress of the measurement process.

[0074] See also Figure 6 The squeezing mechanism includes a spring 20, which is movably connected to the rod wall of the corresponding telescopic rod 8. The two ends of the spring 20 are respectively fixedly connected to the side walls of the corresponding first fixed block 9 and the second fixed block 10. By utilizing the provided spring 20, the first mounting plate 1 and the second mounting plate 2 can be pulled by the elastic force of the spring 20, thereby realizing the clamping and fixing of multiple air ducts 6 to ensure the normal use of multiple ultrasonic detection units 4.

[0075] See also Figure 2-3 The second driving mechanism includes a rotating rod 21 and a second bevel gear 22. One end wall of the rotating rod 21 is rotatably connected to the surface of the third mounting plate 3. The second bevel gear 22 is fixedly connected to the end of the rotating rod 21 away from the third mounting plate 3. The second bevel gear 22 is meshed with the first bevel gear 14. The end of the rotating rod 21 away from the second bevel gear 22 passes through the third mounting plate 3 and is fixedly connected to the worm gear 23. The surface of the mounting plate is provided with a third driving mechanism, which is transmission-connected to the worm gear 23. By utilizing the provided second driving mechanism, the first bevel gear 14 can be driven to rotate during the process of the rotating rod 21 driving the second bevel gear 22 to rotate, thereby realizing the driving of the first driving mechanism.

[0076] See also Figure 2 and Figure 5 The third driving mechanism includes a worm 24 and two second fixed plates 25. The two second fixed plates 25 are symmetrically fixed to the lower surface of the third mounting plate 3. The worm 24 is rotatably connected between the two second fixed plates 25. The worm 24 is meshed with the worm wheel 23. The meshing connection between the worm 24 and the worm wheel 23 can drive the worm wheel 23 to rotate during the rotation of the worm 24, thereby realizing the driving of the rotating rod 21, so as to drive the corresponding first driving mechanism to work.

[0077] See also Figure 2 A clamping rod 26 is fixedly connected to one side of the second connecting plate 16 close to the third mounting plate 3. A mounting groove is provided at the other end of the clamping rod 26. A ball 27 is rotatably provided inside the mounting groove. By utilizing the two clamping rods 26, the friction between the ends of the clamping rods 26 and the inner wall of the smoke gallery can be reduced after the ends of the two clamping rods 26 are in contact and engaged with the inner wall of the smoke gallery, thereby facilitating the continued driving of the clamping rods 26 to move.

[0078] See also Figure 2 The upper surface of the third mounting plate 3 is fixedly connected with a sealing ring 28. The sealing ring 28 can effectively ensure the sealing effect between the third mounting plate 3 and the smoke gallery to prevent smoke from drifting.

[0079] See also Figure 2 and Figure 5 One end of the worm 24 passes through the corresponding second fixed plate 25 and is fixedly connected to the knob 29. By using the provided knob 29, the worm 24 can be driven to rotate during the process of rotating the knob 29, thereby realizing the driving of the third driving mechanism.

[0080] In summary, when the distributed flue measuring device is in use, the first mounting plate 1 and the second mounting plate 2 are inserted into the interior of the flue from the side wall of the flue, and the knob 29 is rotated. During the rotation of the knob 29, the worm 24 is driven to rotate, and during the rotation of the worm 24, the two worm gears 23 are driven to rotate. During the rotation of the two worm gears 23, the corresponding rotating rods 21 are driven to rotate respectively. During the rotation of the two rotating rods 21, the corresponding second bevel gears 22 are driven to rotate respectively. During the rotation of the two second bevel gears 22, the corresponding first bevel gears 14 are driven to rotate respectively. During the rotation of each first bevel gear 14, The corresponding internal threaded sleeve 13 is driven away from the corresponding first fixed plate 11, and during the movement of the internal threaded sleeve 13, the first connecting plate 15 and the second connecting plate 16 are driven close to the third mounting plate 3 through the sliding connection between the second strip opening and the rod wall of the L-shaped rod 19. In the process of the second connecting plate 16 approaching the third mounting plate, the corresponding clamping rod 26 can be driven to move, so that the ball 27 at the end of the clamping rod 26 can be clamped and fixed to the smoke gallery through cooperation with the third mounting plate 3, thereby ensuring the stability of the entire device and the sealing effect at the smoke gallery opening, and ensuring the normal progress of the measurement process.

[0081] It should be noted that the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0082] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A distributed flue measurement device, characterized in that: Applicable to flue measurement; the distributed flue measurement device comprises a first mounting plate (1), a plurality of air ducts (6), and a plurality of ultrasonic detection units (4); The first mounting plate (1) is rectangular or circular, and a plurality of first air holes are provided inside the first mounting plate (1) to form honeycomb-shaped holes; a plurality of air ducts (6) are provided on the rear side of the first mounting plate (1) and are in contact with and connected to the rear side wall of the first mounting plate (1), and each air duct (6) is provided corresponding to one of the first air holes; and each of the ultrasonic detection units (4) is provided on the inner wall of the corresponding air duct (6); It also includes a second mounting plate (2) and a third mounting plate (3), the bottom of the first mounting plate (1) is symmetrically fixedly connected to two connecting rods (5) and is fixedly connected to the third mounting plate (3) through the two connecting rods (5), a connecting mechanism is provided between the first mounting plate (1) and the second mounting plate (2) and is transmission-connected through the connecting mechanism, a plurality of second air holes are provided inside the second mounting plate (2), each of the air ducts (6) is movably arranged inside the corresponding second air hole, the outer wall of each air duct (6) is symmetrically fixedly connected to two blocks (7), each of the blocks (7) is in contact with the side wall of the second mounting plate (2), and two groups of first driving mechanisms are symmetrically provided on the upper surface of the third mounting plate (3), each group of the first driving mechanisms is provided with two, and each of the first driving mechanisms is transmission-connected to a clamping mechanism; The connecting mechanism comprises two telescopic rods (8), the side walls of the first mounting plate (1) are symmetrically fixedly connected to two first fixing blocks (9), the side walls of the second mounting plate (2) are symmetrically fixedly connected to two second fixing blocks (10), the two telescopic rods (8) are respectively fixedly connected between the corresponding first fixing blocks (9) and second fixing blocks (10), and the rod walls of the two telescopic rods (8) are both sleeved with a squeezing mechanism; The clamping mechanism includes a first connecting plate (15) and a second connecting plate (16), the first connecting plate (15) is provided with a first strip opening inside, the first strip opening is movably sleeved with a sliding rod (17), one end of the sliding rod (17) is fixedly connected to the outer wall of the internal threaded sleeve (13) and the other end of the rod wall is fixedly sleeved with an annular baffle (18), the second connecting plate (16) is fixedly connected to the first connecting plate (15) and is provided with a second strip opening inside, the second strip opening is slidably provided with an L-shaped rod (19), and the other end of the L-shaped rod (19) is fixedly connected to the side wall of the third mounting plate (3).

2. A distributed flue measurement device according to claim 1, characterized in that: The squeezing mechanism comprises a spring (20), the spring (20) being movably sleeved with the rod wall of the corresponding telescopic rod (8), and the two ends of the spring (20) being fixedly connected to the side walls of the corresponding first fixed block (9) and second fixed block (10), respectively.

3. A distributed flue measurement device according to claim 1, characterized in that: The first driving mechanism comprises a first fixed plate (11), a screw rod (12) and an internal threaded sleeve (13); the first fixed plate (11) is fixedly connected to the surface of the third mounting plate (3); one end of the screw rod (12) is rotatably connected to the side wall of the first fixed plate (11); the internal threaded sleeve (13) is threadedly sleeved on the rod wall of the screw rod (12); the outer wall of one end of the internal threaded sleeve (13) away from the first fixed plate (11) is transmission-connected to the corresponding clamping mechanism; two second driving mechanisms are symmetrically arranged on the surface of the third mounting plate (3); one end of the screw rod (12) passes through the first fixed plate (11) and is fixedly connected to the first bevel gear (14); the first bevel gear (14) is transmission-connected to the corresponding second driving mechanism.

4. A distributed flue measurement device according to claim 3, characterized in that: The second driving mechanism comprises a rotating rod (21) and a second bevel gear (22); a rod wall at one end of the rotating rod (21) is rotatably connected to the surface of the third mounting plate (3); the second bevel gear (22) is fixedly connected to the end of the rotating rod (21) away from the third mounting plate (3); the second bevel gear (22) is meshedly connected to the first bevel gear (14); the end of the rotating rod (21) away from the second bevel gear (22) passes through the third mounting plate (3) and is fixedly connected to the worm gear (23); a third driving mechanism is provided on the surface of the third mounting plate (3); and the third driving mechanism is transmission-connected to the worm gear (23).

5. A distributed flue gas measurement device according to claim 4, characterized in that: The third driving mechanism comprises a worm (24) and two second fixing plates (25), wherein the two second fixing plates (25) are symmetrically fixedly connected to the lower surface of the third mounting plate (3), the worm (24) is rotatably connected between the two second fixing plates (25), and the worm (24) is meshedly connected to the worm wheel (23).

6. A distributed flue gas measurement device according to claim 5, characterized in that: A sealing ring (28) is fixedly connected to the upper surface of the third mounting plate (3); and / or, One end of the worm (24) passes through the corresponding second fixing plate (25) and is fixedly connected to a knob (29).

7. The distributed flue measurement device according to claim 1, characterized in that: A clamping rod (26) is fixedly connected to one side of the second connecting plate (16) close to the third mounting plate (3), and a mounting groove is provided at the other end of the clamping rod (26), wherein a ball (27) is rotatably provided inside the mounting groove.

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