A device and method for adjusting the flow rate ratio of flue gas

Abstract

The present application relates to the technical field of flue gas regulation, in particular to a device and method for adjusting the flow rate ratio of flue gas by translation, comprising a flue gas outlet plate arranged at the front end of a pipeline and an air outlet arranged on the flue gas outlet plate, a pitot tube, a driving mechanism, a shielding plate and an adjusting mechanism, wherein the pitot tube is installed below the flue gas outlet plate, the driving mechanism is installed at the pitot tube, the shielding plate is installed above the flue gas outlet plate, the adjusting mechanism is located on one side of the shielding plate, the pitot tube detects and transmits the air volume to the driving mechanism, the speed of flue gas emission is monitored in real time by the pitot tube method, and different flow paths are formed for the flue gas when the initial and excessive discharge amounts are different, so as to reduce the discharge amount of flue gas by extending the flue gas flow path.

Description

Technical Field

[0001] This invention relates to the field of flue gas regulation technology, specifically to a device and method for comparing and regulating flue gas flow rate and velocity that can be adjusted by translation. Background Technology

[0002] An adjustable flue gas flow rate and velocity comparison device is a specialized device designed to monitor and adjust flue gas flow rate and velocity. It is typically equipped with a translation adjustment mechanism, allowing the position of the detection point to be adjusted as needed, thereby achieving accurate comparison of flue gas flow rate and velocity at different locations.

[0003] During the adjustment process, if the flue gas exceeds the measurement threshold, the translation mechanism will adjust the precise movement of the detection point in the horizontal or vertical direction. Since the flow meter requires a certain reaction time, the data transmission also requires a certain amount of time. At this time, the flue gas will escape outward at an uneven flow rate, and the measured data cannot reflect the true situation of flue gas changes. This leads to inaccurate flow rate data and flue gas emission data, making it difficult to adjust the flue gas emission in a timely manner, and further causing environmental pollution.

[0004] To address the aforementioned issues, various solutions have been proposed in the prior art, such as changing the diameter of the flue gas outlet or accurately measuring the internal flue gas velocity using ultrasonic methods. However, the data transmission time and the start-up time of the flue gas regulation equipment are not negligible. When a sudden abnormality in flue gas discharge occurs, it is difficult to adjust the flue gas discharge in a timely manner according to the change in flue gas velocity.

[0005] Based on this, in order to solve the problem that the data transmission time of flue gas detection and the start-up time of flue gas conditioning equipment are too long, making it difficult to adjust the flue gas discharge volume in a timely manner to reduce pollution when the flue gas discharge volume is abnormal, this invention designs a flue gas flow rate and velocity comparison device and adjustment method that can be shifted and adjusted. Summary of the Invention

[0006] This invention provides a translationally adjustable flue gas flow rate and velocity comparison device and adjustment method, which solves the problem that due to the excessively long data transmission time of flue gas detection and the start-up time of flue gas adjustment equipment, it is difficult to adjust the flue gas discharge in a timely manner to reduce pollution when the flue gas discharge is abnormal. The device monitors the flue gas emission velocity in real time through the Pitot tube method, and through the chamber transmission, the flue gas forms different flow paths at the initial stage and when the discharge is excessive, thereby reducing the amount of flue gas emitted by extending the flue gas flow path.

[0007] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a movable and adjustable flue gas flow rate and velocity comparison device, including a smoke outlet plate at the front end of a duct and an air outlet on the smoke outlet plate, as well as a Pitot tube, a drive mechanism, a baffle plate, and an adjustment mechanism. The Pitot tube is installed below the smoke outlet plate, the drive mechanism is installed at the Pitot tube, the baffle plate is installed above the smoke outlet plate, and the adjustment mechanism is located on one side of the baffle plate. The Pitot tube detects and transmits the air volume to the drive mechanism. The drive mechanism drives the baffle plate to move unidirectionally by increasing the gas flow rate inside the Pitot tube. The baffle plate drives the adjustment mechanism to reduce the outflow of flue gas in the flue gas duct. The Pitot tube can detect the flue gas discharged upward through the air outlet in real time. On the one hand, the detection result can be transmitted to a data platform, and on the other hand, it can be used to start other devices, thereby forming a timely adjustment of the internal system.

[0008] Preferably, the number of pitot tubes is equal to the number of flue gas outlets to be measured, a sensor is provided at the bend of the pitot tube, and the number of shields is equal to the number of pitot tubes, thereby enabling real-time monitoring of multiple pipelines.

[0009] Preferably, the driving mechanism includes an air guide pipe, a diaphragm, a misalignment hole, and a corrugated pipe; the air guide pipe is connected to the end of the Pitot tube, the diaphragm is installed above the smoke outlet plate, the diaphragm is connected to the other end of the air guide pipe, the misalignment hole corresponds to the air outlet, and the corrugated pipe is installed between the misalignment hole and the air outlet. By extending the exhaust path of the flue gas, the amount of flue gas discharged per unit time is reduced, thereby achieving control of the amount of flue gas discharged.

[0010] Preferably, the adjustment mechanism includes a lever, a connecting shaft, a telescopic rod, a fixed rod, a drive plate, a rotating handle, and a misalignment plate. The lever is installed above the diaphragm box, the connecting shaft is installed below the other end of the lever, the telescopic rod is installed at the other end of the connecting shaft, the fixed rod is installed on the telescopic rod, the drive plate is hinged to the bottom end of the telescopic rod, the rotating handle is installed at the drive plate, and the misalignment plate is hinged to the smoke outlet plate. The misalignment plate is connected to the rotating handle, thereby blocking the smoke at the air outlet and the corrugated pipe, thus reducing the amount of smoke emitted.

[0011] Preferably, the corrugated pipe has a double-layer structure, consisting of an inner pipe and an outer pipe, with a baffle layer distributed between the outer and inner pipes. This provides a transmission cavity between the two layers of the corrugated pipe, reducing the amount of flue gas emitted per unit time.

[0012] Preferably, the diameter of the circle at the top of the membrane box is larger than the diameter of the circle at the bottom of the membrane box, so that the movement of the membrane box can easily drive the lever to move.

[0013] Preferably, an expansion layer is installed on the upper edge of the outer tube. The initial position of the expansion layer is located on the inner fold surface of the outer tube. The cross-section of the expansion layer is the same as the cross-section of the inner void of the outer tube. As the expansion layer blocks the airflow, it can change the flow direction of the flue gas, thereby prolonging the time from when the flue gas passes through the air outlet to when it is completely discharged, and thus reducing the exhaust volume of the misaligned hole per unit time.

[0014] Preferably, the volume of the gap between the outer and inner pipes is twice the volume of the inner pipe, and a guide plate is installed at the bottom between the outer and inner pipes. The edge thickness of the guide plate is greater than the center thickness, and the projected area of ​​the guide plate is equal to half the bottom area of ​​the gap between the outer and inner pipes. Firstly, it can block the gap between the outer and inner pipes, thus restricting the flow path of gas as it flows upward through the outlet, causing it to flow upward through the outlet. The guide plate also changes the air intake between the corrugated pipes, reducing the air intake and extending the gas flow time within the corrugated pipes, thereby reducing the emission per unit time. Secondly, it can guide the airflow from a free direction to the gap between the outlet and the bottom of the corrugated pipe in a constrained manner, thereby reducing the resistance at the outlet and allowing the flue gas to be discharged more smoothly.

[0015] Preferably, one end of the baffle layer is connected to the inner wall of the outer pipe, and the other end of the baffle layer is connected to the side of the inner pipe facing the outer pipe. The baffle layer is folded, and the bottom of the folded surface at the edge of the baffle layer is shorter than the folded surface at the center. As the corrugated pipe unfolds, the baffle layer gradually unfolds, thereby blocking the flue gas entering from the air outlet.

[0016] A method for adjusting a shiftable flue gas flow rate and velocity comparison device, applicable to any of the aforementioned shiftable flue gas flow rate and velocity comparison devices, includes the following steps: S1: When the flue gas is transmitted to the Pitot tube, part of the flue gas is absorbed into the Pitot tube by Bernoulli's principle. The sensor set in the Pitot tube detects the change in gas pressure. When the pressure does not change, the flue gas emission speed is normal and the emission volume is qualified. S2: When the flue gas velocity increases, the sensor inside the Pitot tube senses the increase in gas pressure and transmits it outward through an electrical signal, thus indicating that the flue gas velocity has changed. S3: When the dynamic pressure of the Pitot tube increases, the pressure of the diaphragm box connected to it through the air guide tube increases synchronously, which drives the baffle plate to move upward. At this time, the baffle plate will stretch the bellows and increase the travel of the flue gas from the air outlet to the misalignment hole. S4: When the pressure in the diaphragm increases, the top will move upward, causing one end of the lever to move upward. At this time, the other end of the lever moves downward, pushing the connecting shaft and the telescopic rod to rotate. Thus, the telescopic rod moves the misalignment plate through the drive plate to block the air outlet. At the same time, when the bellows expands upward, it will cause the baffle layer to expand, thereby extending the flow path of the gas inside the bellows.

[0017] The beneficial effects of this invention are as follows: 1. The present invention proposes a translationally adjustable flue gas flow rate and velocity comparison device. Through the cooperation of a drive mechanism and an adjustment mechanism, under the detection and transmission of the Pitot tube, the drive mechanism reacts quickly, thereby driving and controlling other structures. As the flue gas flow rate detected by the Pitot tube gradually increases, the drive mechanism can drive other mechanisms to change. Under the action of the drive mechanism, the adjustment mechanism changes the air intake volume at the air outlet, and at the same time changes the discharge volume and discharge velocity; thereby extending the flue gas outflow path and reducing the flue gas outflow velocity, thus reducing the amount of flue gas discharged, achieving normal flue gas emission, and avoiding environmental pollution.

[0018] 2. The present invention proposes a translatably adjustable flue gas flow rate and velocity comparison device. When the diaphragm box rises under the influence of dynamic pressure, it will drive one end of the lever hinged to the diaphragm box to move upward. At this time, a fixed column supporting the lever is installed on the smoke outlet plate. As the diaphragm box moves upward, one end of the lever moves upward, while the other end moves downward, which in turn pushes the connecting shaft in contact with it to move downward. The connecting shaft drives one end of the telescopic rod connected to it to move obliquely downward. At this time, the telescopic rod is hinged to the fixed rod, and the other end of the telescopic rod rotates upward around the fixed rod. The extension and retraction of the telescopic rod is used to compensate for the distance change caused by its extension and retraction. Thus, the telescopic rod drives the drive plate hinged to it to move and pushes the rotating handle, thereby pushing the end of the misaligned plate hinged to the smoke outlet plate, thereby achieving the obstruction of flue gas at the air outlet and the corrugated pipe, and thus reducing the amount of flue gas emitted.

[0019] 3. The present invention proposes an adjustment method for a movable and adjustable flue gas flow rate and velocity comparison device. By detecting the flow velocity of flue gas at the outlet in real time, the method automatically adjusts the discharge volume of flue gas. Specifically, it adopts the method of increasing the flue gas travel distance and reducing the flue gas outlet diameter, thereby enabling timely control of the discharge volume of flue gas per unit time and reducing environmental pollution. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are one embodiment of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the driving mechanism of the present invention; Figure 3 yes Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the adjustment mechanism of the present invention; Figure 5 This is a bottom view of the present invention; Figure 6 This is a half-sectional schematic diagram of the present invention; Figure 7 This is a half-sectional schematic diagram from another perspective of the present invention; Figure 8 This is a flowchart of the method of the present invention.

[0022] In the diagram: 1. Pipe; 2. Smoke outlet plate; 3. Air outlet; 4. Pitot tube; 5. Drive mechanism; 51. Air guide pipe; 52. Diaphragm box; 53. Misalignment hole; 54. Corrugated pipe; 541. Inner pipe; 542. Outer pipe; 543. Baffle layer; 544. Expansion layer; 6. Baffle plate; 7. Adjustment mechanism; 71. Lever; 72. Coupling; 73. Telescopic rod; 74. Fixed rod; 75. Drive plate; 76. Rotating handle; 77. Misalignment plate. Detailed Implementation

[0023] To better understand the above solution, the technical solution will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1-8 As shown, the present invention provides a movable and adjustable flue gas flow rate and velocity comparison device, including a smoke outlet plate 2 opened at the front end of the pipe 1 and an air outlet 3 opened on the smoke outlet plate 2, and also including a Pitot tube 4, a drive mechanism 5, a baffle plate 6, and an adjustment mechanism 7. The Pitot tube 4 is installed below the smoke outlet plate 2, the drive mechanism 5 is installed at the Pitot tube 4, the baffle plate 6 is installed above the smoke outlet plate 2, and the adjustment mechanism 7 is located on one side of the baffle plate 6. The Pitot tube 4 detects and transmits the air volume to the drive mechanism 5. The drive mechanism 5 drives the baffle plate 6 to move unidirectionally by increasing the gas flow rate inside the Pitot tube 4. The baffle plate 6 drives the adjustment mechanism 7 to reduce the outflow of flue gas in the flue gas flow channel.

[0025] The flue gas at the bottom of the initial pipe 1 will flow upward and be discharged through the air outlet 3 on the smoke outlet plate 2. The air outlet 3 restricts the emission of flue gas inside the pipe 1 and also provides a flow path for the flue gas. With the installation of the Pitot tube 4, the Pitot tube 4 can detect the flue gas discharged upward through the air outlet 3 in real time. On the one hand, the detection results can be transmitted to the data platform, and on the other hand, they can be used to start other devices, thereby forming timely adjustment of the internal system. The drive mechanism 5 reacts quickly under the detection and transmission of the pitot tube 4, thereby driving and controlling other structures. As the flue gas flow detected by the pitot tube 4 gradually increases, the drive mechanism 5 can drive other mechanisms to change, thereby extending the flue gas outflow path and reducing the flue gas outflow speed, thus reducing the amount of flue gas discharged, achieving normal flue gas emission and avoiding environmental pollution.

[0026] The baffle plate 6 is a component that moves synchronously with the drive mechanism 5. As the baffle plate 6 moves upward, it can clearly increase the distance between itself and the air outlet 3. Thus, when the flue gas is discharged, the misaligned hole 53 on the baffle plate 6 and the air outlet 3 can form a new flow channel. On the one hand, it increases the distance that the flue gas needs to travel to exit, thereby achieving the effect of reducing the amount of flue gas emitted. On the other hand, by increasing the resistance to the flue gas flow, when the flue gas flows outward, it can reduce the flue gas velocity and the amount of emission under the condition of high resistance.

[0027] The regulating mechanism 7, under the action of the driving mechanism 5, changes the orifice size and simultaneously changes the discharge volume and discharge speed.

[0028] The number of Pitot tubes 4 is equal to the number of air outlets 3 to be measured. Sensors are provided at the bends of the Pitot tubes 4. The number of baffles 6 is equal to the number of Pitot tubes 4.

[0029] It can be configured with different pipes 1 corresponding to different numbers of air outlets 3. As the flue gas is transmitted and discharged in each pipe 1, the Pitot tube 4 in each pipe 1 can monitor in real time, and then adjust the flue gas speed of the internal flue gas through the air outlet 3 in a targeted manner. The sensor can sense the pressure change on the one hand, and on the other hand, it can adjust the flow at the air outlet 3 by means of pressure transmission.

[0030] The drive mechanism 5 includes an air guide pipe 51, a diaphragm box 52, a misalignment hole 53, and a bellows pipe 54; the air guide pipe 51 is connected to the end of the Pitot tube 4, the diaphragm box 52 is installed above the smoke outlet plate 2, the diaphragm box 52 is connected to the other end of the air guide pipe 51, the misalignment hole 53 corresponds to the air outlet 3, and the bellows pipe 54 is installed between the misalignment hole 53 and the air outlet 3; The pressure inside the diaphragm 52 and the Pitot tube 4 is balanced by the air duct 51. When the flow rate increases, the Pitot tube 4 transmits the increased dynamic pressure to the diaphragm 52, which increases the dynamic pressure inside the cartridge. This gradually lifts the baffle 6, causing the misalignment hole 53 to rise. The corrugated layer between the misalignment hole 53 and the air outlet 3 changes from a compressed state to a stretched state. This extends the exhaust path of the flue gas, thereby reducing the amount of flue gas discharged per unit time and thus controlling the amount of flue gas discharged.

[0031] The adjustment mechanism 7 includes a lever 71, a connecting shaft 72, a telescopic rod 73, a fixed rod 74, a drive plate 75, a rotating handle 76, and a misalignment plate 77. The lever 71 is installed above the diaphragm box 52, the connecting shaft 72 is installed below the other end of the lever 71, the telescopic rod 73 is installed at the other end of the connecting shaft 72, the fixed rod 74 is installed on the telescopic rod 73, the drive plate 75 is hinged to the bottom end of the telescopic rod 73, the rotating handle 76 is installed at the drive plate 75, and the misalignment plate 77 is hinged to the smoke outlet plate 2. The misalignment plate 77 is connected to the rotating handle 76.

[0032] When the diaphragm box 52 rises under the influence of dynamic pressure, it will drive one end of the lever 71 hinged to the diaphragm box 52 to move upward. At this time, the smoke outlet plate 2 is equipped with a fixed column supporting the lever 71. As the diaphragm box 52 moves upward, one end of the lever 71 moves upward, while the other end moves downward, which will push the connecting shaft 72 in contact with it to move downward. The connecting shaft 72 drives one end of the telescopic rod 73 connected to it to move obliquely downward. At this time, the telescopic rod 73 is hinged to the fixed rod 74, and the other end of the telescopic rod 73 rotates upward around the fixed rod 74. The extension and retraction of the telescopic rod 73 is used to compensate for the distance change caused by its extension and retraction. Thus, the telescopic rod 73 drives the drive plate 75 hinged to it to move and pushes the rotating handle 76, thereby pushing the end of the misaligned plate 77 hinged to the smoke outlet plate 2, thereby achieving the blocking of the flue gas at the air outlet 3 and the bellows 54, thereby reducing the amount of flue gas emitted.

[0033] The corrugated pipe 54 has a double-layer structure, consisting of an inner pipe 541 and an outer pipe 542, with a baffle layer 543 distributed between the outer pipe 542 and the inner pipe 541.

[0034] The inner tube 541 and the outer tube 542 have different bending angles, resulting in different flow patterns of the internal gas. In the initial state, the baffle layer 543 can allow the flue gas to flow along the direction of the baffle layer 543, thereby providing a transmission cavity between the two layers of the corrugated pipe 54 and reducing the amount of flue gas emitted per unit time.

[0035] The diameter of the circle at the top of the diaphragm box 52 is larger than the diameter of the circle at the bottom of the diaphragm box 52. When the diaphragm box 52 rises, it will gradually drive the lever 71 to move. However, if the vertical distance of the diaphragm box 52 is the same, the movement of the diaphragm box 52 will not be able to quickly drive the lever 71 to move, thereby realizing the normal operation of the adjustment mechanism 7.

[0036] An expansion layer 544 is installed on the upper edge of the outer tube 542. The expansion layer 544 is initially located on the inner fold surface of the outer tube 542. The cross-section of the expansion layer 544 is the same as the cross-section of the inner void of the outer tube 542. When the corrugated tube 54 is not unfolded, the expansion layer 544 fills the gap inside the tube, thereby avoiding the flue gas flow path being too long in the initial state. Therefore, the amount of flue gas emitted will not be affected compared to when the corrugated tube 54 is unfolded. After the corrugated pipe 54 is unfolded, the top of the expansion layer 544 is connected to the inner wall of the outer pipe 542, and the distance between the inner pipe 541 and the outer pipe 542 becomes smaller. The expansion layer 544 fits the outer wall of the inner pipe 541, thus forming a blocking block. With the blocking effect of the expansion layer 544, the flow direction of the flue gas can be changed, thereby prolonging the time from when the flue gas passes through the air outlet 3 to when it is completely discharged, thereby reducing the exhaust volume of the misaligned hole 53 per unit time.

[0037] The volume of the gap between the outer pipe 542 and the inner pipe 541 is twice the volume of the inner pipe 541. A guide plate is installed at the bottom between the outer pipe 542 and the inner pipe 541. The edge thickness of the guide plate is greater than the center thickness, and the projected surface of the guide plate is equal to half the bottom area of ​​the gap between the outer pipe 542 and the inner pipe 541. The guide plate has the following functions: First, it can block the gap between the outer pipe 542 and the inner pipe 541. When the gas flows upward through the air outlet 3, it can restrict the flow path of the gas, and thus the gas will flow upward through the air outlet 3. The guide plate changes the air intake between the corrugated pipes 54. With the air intake reduced, it can prolong the flow time of the gas in the corrugated pipes 54 and reduce the emission per unit time.

[0038] Secondly, it can guide the airflow from a free direction to the gap between the air outlet 3 and the bottom of the corrugated pipe 54 in a constrained manner, thereby reducing the resistance at the air outlet 3 and allowing the flue gas to be discharged more smoothly.

[0039] The air guide plate is embedded in the smoke outlet plate 2, and a gap is opened on the outer pipe 542 and the inner pipe 541 to accommodate the air guide plate.

[0040] One end of the baffle layer 543 is connected to the inner wall of the outer pipe 542, and the other end of the baffle layer 543 is connected to the side of the inner pipe 541 facing the outer pipe 542. The baffle layer 543 is folded, and the bottom of the folded surface at the edge of the baffle layer 543 is shorter than the folded surface at the center. When not unfolded, the folded surface is small and will not have a significant impact on the flow of flue gas. However, as the corrugated pipe 54 unfolds, the baffle layer 543 gradually unfolds, thereby blocking the flue gas entering from the air outlet 3.

[0041] A method for adjusting a shiftable flue gas flow rate and velocity comparison device, applicable to any of the aforementioned shiftable flue gas flow rate and velocity comparison devices, includes the following steps: S1: When the flue gas is transmitted to the Pitot tube 4, part of the flue gas is absorbed into the Pitot tube 4 through Bernoulli's principle. The sensor set in the Pitot tube 4 senses the change in gas pressure. When the pressure does not change, the flue gas emission speed is normal and the emission volume is qualified. S2: When the flue gas velocity increases, the sensor inside the Pitot tube 4 senses the increase in gas pressure and transmits it outward through an electrical signal, thus indicating that the flue gas velocity has changed at this time. S3: When the dynamic pressure of the Pitot tube 4 increases, the pressure of the diaphragm 52 connected to it through the air guide tube 51 increases synchronously, causing the baffle plate 6 to move upward. At this time, the baffle plate 6 will stretch the bellows 54, increasing the travel distance of the flue gas from the air outlet 3 to the misalignment hole 53. S4: When the pressure of the diaphragm 52 increases, the top will move upward, causing one end of the lever 71 to move upward. At this time, the other end of the lever 71 moves downward, pushing the connecting shaft 72 and the telescopic rod 73 to rotate. Thus, the telescopic rod 73 moves the misalignment plate 77 through the drive plate 75 to block the air outlet 3. At the same time, when the bellows 54 expands upward, it will cause the baffle layer 543 to expand, thereby extending the flow path of the gas in the bellows 54.

[0042] When it is necessary to compare the flow rate and velocity of flue gas, the flue gas is transmitted to the Pitot tube 4. Through Bernoulli's principle, some of the flue gas is absorbed and enters the Pitot tube 4. The sensor set in the Pitot tube 4 senses the change in gas pressure. When the pressure does not change, the flue gas emission speed is normal and the emission volume is qualified. When the flue gas velocity increases, the sensor inside the Pitot tube 4 detects the increased gas pressure and transmits it outward via an electrical signal, thus indicating a change in flue gas velocity. The air duct 51 balances the pressure within the diaphragm cartridge 52 and the Pitot tube 4. When the flue gas velocity increases, the Pitot tube 4, under the condition of increased dynamic pressure, transmits this pressure to the diaphragm cartridge 52, increasing the dynamic pressure inside the cartridge. This gradually raises the baffle plate 6, causing the misalignment hole 53 to rise. The corrugated layer between the misalignment hole 53 and the air outlet 3 changes from a compressed state to a stretched state. As the diaphragm cartridge 52 rises under the influence of dynamic pressure, it also drives the hinged section of the diaphragm cartridge 52... One end of lever 71 moves upward, while the other end moves downward, which in turn pushes the connecting shaft 72 in contact with it to move downward. The connecting shaft 72 drives one end of the telescopic rod 73 connected to it to move diagonally downward. At this time, the telescopic rod 73 is hinged to the fixed rod 74, and the other end of the telescopic rod 73 rotates upward around the fixed rod 74. The extension and retraction of the telescopic rod 73 is used to compensate for the distance change caused by its extension and retraction. Thus, the telescopic rod 73 drives the drive plate 75 hinged to it to move and pushes the rotating handle 76, thereby pushing the end of the misaligned plate 77 hinged to the smoke outlet plate 2, thus forming a blockage at the air outlet 3.

[0043] The foregoing has shown and described the basic principles and beneficial effects of the present invention. However, the present invention is not limited to the above embodiments. Various changes and modifications can be made to the present invention without departing from its effects and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A movable and adjustable flue gas flow rate and velocity comparison device, comprising a smoke outlet plate (2) disposed at the front end of a pipe (1) and an air outlet (3) disposed on the smoke outlet plate (2), characterized in that: It also includes a pitot tube (4), a drive mechanism (5), a baffle plate (6), and an adjustment mechanism (7). The pitot tube (4) is installed below the smoke outlet plate (2), the drive mechanism (5) is installed at the pitot tube (4), the baffle plate (6) is installed above the smoke outlet plate (2), and the adjustment mechanism (7) is located on one side of the baffle plate (6). The pitot tube (4) detects and transmits the air volume to the drive mechanism (5). The drive mechanism (5) drives the baffle plate (6) to move unidirectionally by increasing the gas flow rate inside the pitot tube (4). The baffle plate (6) drives the adjustment mechanism (7) to reduce the outflow of flue gas in the flue gas duct (1). The drive mechanism (5) includes an air guide pipe (51), a diaphragm (52), a misalignment hole (53), and a bellows (54); the air guide pipe (51) is connected to the end of the Pitot tube (4), the diaphragm (52) is installed above the smoke outlet plate (2), the diaphragm (52) is connected to the other end of the air guide pipe (51), the misalignment hole (53) corresponds to the air outlet (3), and the bellows (54) is installed between the misalignment hole (53) and the air outlet (3); The adjustment mechanism (7) includes a lever (71), a connecting shaft (72), a telescopic rod (73), a fixed rod (74), a drive plate (75), a rotating handle (76), and a misalignment plate (77). The lever (71) is installed above the diaphragm box (52). The connecting shaft (72) is installed below the other end of the lever (71). The telescopic rod (73) is installed at the other end of the connecting shaft (72). The fixed rod (74) is installed on the telescopic rod (73). The drive plate (75) is hinged to the bottom end of the telescopic rod (73). The rotating handle (76) is installed at the drive plate (75). The misalignment plate (77) is hinged to the smoke outlet plate (2). The misalignment plate (77) is connected to the rotating handle (76). The corrugated pipe (54) has a double-layer structure, which is divided into an inner pipe (541) and an outer pipe (542). A baffle layer (543) is distributed between the outer pipe (542) and the inner pipe (541). An expansion layer (544) is installed on the upper edge of the outer tube (542). The initial position of the expansion layer (544) is located on the inner fold surface of the outer tube (542). The cross section of the expansion layer (544) is the same as the cross section of the void inside the outer tube (542).

2. The adjustable flue gas flow rate and velocity comparison device according to claim 1, characterized in that: The number of Pitot tubes (4) is equal to the number of air outlets (3) to be measured. Sensors are provided at the bends of the Pitot tubes (4). The number of baffles (6) is equal to the number of Pitot tubes (4).

3. The adjustable flue gas flow rate and velocity comparison device according to claim 1, characterized in that: The diameter of the circle at the top of the membrane box (52) is greater than the diameter of the circle at the bottom of the membrane box (52).

4. The adjustable flue gas flow rate and velocity comparison device according to claim 1, characterized in that: The volume of the gap between the outer tube (542) and the inner tube (541) is twice the volume of the inner tube (541). A guide plate is installed at the bottom between the outer tube (542) and the inner tube (541). The edge thickness of the guide plate is greater than the center thickness, and the projection surface of the guide plate is equal to half the bottom area of ​​the gap between the outer tube (542) and the inner tube (541).

5. The adjustable flue gas flow rate and velocity comparison device according to claim 4, characterized in that: One end of the baffle layer (543) is connected to the inner wall of the outer tube (542), and the other end of the baffle layer (543) is connected to the side of the inner tube (541) facing the outer tube (542). The baffle layer (543) is folded, and the bottom of the folded surface at the edge of the baffle layer (543) is shorter than the folded surface at the center.

6. A method for adjusting a translationally adjustable flue gas flow rate and velocity comparison device, applicable to any one of the translationally adjustable flue gas flow rate and velocity comparison devices according to claims 1-5, characterized in that: Includes the following steps: S1: When the flue gas is transmitted to the Pitot tube (4), part of the flue gas is absorbed by Bernoulli's principle and enters the Pitot tube (4). The sensor set in the Pitot tube (4) senses the change in gas pressure. When the pressure does not change, the flue gas emission speed is normal and the emission volume is qualified. S2: When the flue gas velocity increases, the sensor in the Pitot tube (4) senses the increase in gas pressure and transmits it outward through an electrical signal, thus knowing that the flue gas velocity has changed at this time. S3: When the dynamic pressure of the Pitot tube (4) increases, the pressure of the diaphragm (52) connected to it through the air guide tube (51) increases synchronously, which drives the baffle plate (6) to move upward. At this time, the baffle plate (6) will stretch the bellows (54) and increase the travel distance of the flue gas from the air outlet (3) to the misalignment hole (53). S4: When the pressure of the diaphragm box (52) increases, the top will move upward, causing one end of the lever (71) to move upward. At this time, the other end of the lever (71) moves downward, pushing the connecting shaft (72) and the telescopic rod (73) to rotate. Thus, the telescopic rod (73) moves the misalignment plate (77) through the drive plate (75) to block the air outlet (3). At the same time, when the bellows (54) expands upward, it will cause the baffle layer (543) to expand, thereby extending the flow path of the gas in the bellows (54).

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