A flue gas flow rate monitor

Abstract

This utility model discloses a flue gas velocity monitor, including a housing and a velocity measuring tube. A cover plate is fixedly connected to the outer periphery of the velocity measuring tube. An annular positioning block that cooperates with the cover plate is connected to the top of the housing through an opening. This utility model relates to the field of flue gas detection technology. The flue gas velocity monitor, through the cooperation between the housing, cover plate, screw, velocity measuring tube, filter tube, guide cone, fixing rod, front baffle, and T-shaped rod, facilitates the overall separation of the velocity measuring tube, filter tube, guide cone, front baffle, rear baffle, and housing. Simultaneously, through the cooperation between the internal threaded sleeve, filter tube, mounting ring, and annular limiting plate, it is easy to separate the filter tube, mounting ring, and velocity measuring tube, thereby facilitating the cleaning or replacement of clogged or contaminated components. This reduces the maintenance difficulty and time cost of the flue gas velocity monitor to a certain extent, and extends the overall service life of the flue gas velocity monitor.

Description

Technical Field

[0001] This utility model relates to the field of flue gas detection technology, specifically a flue gas velocity monitor. Background Technology

[0002] In the fields of industrial production and environmental protection, accurate monitoring of flue gas velocity is crucial. Industrial emissions contain a large number of pollutants, and accurately grasping the flue gas velocity helps to rationally control the operating parameters of waste gas treatment equipment, improve the efficiency of desulfurization, denitrification and other treatments, and ensure that waste gas is discharged in compliance with standards. At the same time, flue gas velocity data is also a key basis for enterprises to assess energy consumption in the production process and optimize the process flow.

[0003] Chinese Patent Publication No. CN222658130U discloses an integrated flue gas velocity monitor, including a mounting plate. The mounting plate has evenly distributed fixing grooves inside, and a velocity measuring tube is mounted at the bottom of the mounting plate. An ultrasonic probe is evenly installed inside the velocity measuring tube. This invention achieves the separation of the front and rear baffles from the flue gas velocity monitor as a whole through connecting grooves and connecting blocks. The front and rear baffles can be removed from the inside of the flue gas velocity monitor as a whole. Internal and external threads facilitate the separation of the velocity measuring tube from the mounting plate and the filter cartridge from the velocity measuring tube. The rear baffle, front baffle, filter cartridge, and mounting ring can be removed from the inside of the flue gas velocity monitor as a whole, facilitating the separation of these structures from the monitor. This allows for cleaning or replacement of these structures, extending the overall service life of the flue gas velocity monitor and improving its overall lifespan.

[0004] The existing technical solutions described above have the following shortcomings: During use, the integrated flue gas velocity detector requires regular cleaning and partial replacement by operators. First, the front and rear baffles are separated from the detector via connecting grooves and blocks. The front and rear baffles are then removed from the detector. Next, the speed measuring tube is separated from the mounting plate, and the filter cartridge from the speed measuring tube via internal and external threads. This allows the rear baffle, front baffle, filter cartridge, and mounting ring to be removed from the detector. This process requires multiple steps to disassemble the internal structure, making it cumbersome and inconvenient for regular cleaning and partial replacement. Therefore, a new flue gas velocity detector needs to be designed to solve these problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a flue gas velocity monitor, which solves the problem that flue gas velocity monitors are inconvenient to clean regularly and replace partially.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a flue gas velocity monitor, comprising a housing and a velocity measuring tube, wherein a cover plate is fixedly connected to the outer periphery of the velocity measuring tube, and an annular positioning block for use with the cover plate is connected to the top of the housing through an opening, and threaded rods are threadedly connected to both sides of the top of the cover plate through threaded through holes, and threaded grooves for use with the threaded rods are formed on both sides of the top of the annular positioning block, an annular rubber sealing ring is installed at the bottom of the cover plate, and an annular groove for use with the annular rubber sealing ring is formed at the top of the annular positioning block, and a velocity measuring tube is installed at the top of the cover plate through a through hole, wherein the velocity measuring tube... Ultrasonic probes are installed on both sides of the inner cavity through through slots. The bottom of the outer surface of the speed measuring tube is threaded with an internal threaded sleeve through a threaded part. A filter cylinder is fixedly connected to the bottom of the internal threaded sleeve. An installation ring is placed at the bottom of the inner cavity of the speed measuring tube. A first rectifier tube bundle and a second rectifier tube bundle are respectively installed at the top and bottom of the inner cavity of the installation ring. An annular installation groove is opened at the top of the filter cylinder to cooperate with the installation ring. A guide cone is fixedly connected to the bottom of the filter cylinder. A fixing rod is fixedly connected to the bottom of the guide cone. A front baffle is fixedly connected to the bottom end of the fixing rod, and the front baffle is hemispherical. A rear baffle is fixedly sleeved on the outer periphery of the fixing rod.

[0007] Preferably, the inner wall of the speed measuring tube is fixedly connected to an annular limiting plate that cooperates with the mounting ring.

[0008] Preferably, the bottom of the front baffle is provided with a vertical groove, and the interior of the front baffle is provided with an annular locking groove that communicates with the vertical groove. A crossbar is fixedly connected between the two sides of the bottom of the housing cavity, and a T-shaped rod that cooperates with the vertical groove and the annular locking groove is fixedly connected to the top of the crossbar.

[0009] Preferably, an air inlet is provided at the bottom of the housing.

[0010] This utility model provides a flue gas velocity monitor. It has the following beneficial effects:

[0011] (1) This utility model facilitates the overall separation of the speed measuring tube, filter tube, guide cone, front baffle, rear baffle and housing through the cooperation between the shell, cover plate, screw, speed measuring tube, filter tube, guide cone, fixing rod, front baffle and T-shaped rod. At the same time, the cooperation between the internal threaded sleeve, filter tube, mounting ring and annular limiting plate facilitates the separation of the filter tube, mounting ring and speed measuring tube, thereby making it convenient for staff to clean or replace the blocked and contaminated parts. To a certain extent, this reduces the maintenance difficulty and time cost of the flue gas velocity monitor and extends the overall service life of the flue gas velocity monitor.

[0012] (2) This utility model further restricts the movement of the front baffle in all directions by the cooperation of the T-shaped rod, the vertical groove and the annular locking groove, so as to avoid the impact force of the flue gas on the front baffle during the monitoring process, which would cause the front baffle to shake, and make the flue gas pass smoothly along the preset path, thereby improving the stability of the front baffle during the monitoring process. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the internal structure of the flow guide cone, filter cylinder and velocity measuring tube of this utility model;

[0016] Figure 4 This is a schematic diagram of the internal structure of the front baffle of this utility model;

[0017] Figure 5 This is a top view of the internal structure of the front baffle of this utility model;

[0018] Figure 6 This utility model Figure 2 A magnified view of a section at point A in the middle;

[0019] Figure 7 This utility model Figure 3 A magnified view of a section at point B in the middle.

[0020] In the diagram, 1. Housing; 2. Annular positioning block; 3. Cover plate; 4. Screw; 5. Threaded groove; 6. Annular rubber sealing ring; 7. Annular groove; 8. Speed ​​measuring tube; 9. Ultrasonic probe; 10. Filter cartridge; 11. Mounting ring; 12. First rectifier tube bundle; 13. Second rectifier tube bundle; 14. Annular mounting groove; 15. Guide cone; 16. Fixing rod; 17. Front baffle; 18. Rear baffle; 19. Annular limiting plate; 20. Vertical groove; 21. Annular locking groove; 22. Horizontal bar; 23. T-shaped bar; 24. Air inlet; 25. Internal threaded sleeve. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] Please see Figure 1-7This utility model provides a technical solution: a flue gas velocity monitor, comprising a housing 1 and a velocity measuring tube 8, characterized in that: a cover plate 3 is fixedly connected to the outer periphery of the velocity measuring tube 8; an annular positioning block 2, which cooperates with the cover plate 3, is connected to the top of the housing 1 through an opening; screws 4 are threadedly connected to both sides of the top of the cover plate 3 through threaded through holes; threaded grooves 5, which cooperate with the screws 4, are formed on both sides of the top of the annular positioning block 2; an annular rubber sealing ring 6 is installed at the bottom of the cover plate 3; an annular groove 7, which cooperates with the annular rubber sealing ring 6, is formed on the top of the annular positioning block 2; and the velocity measuring tube 8 is installed through a through hole in the top of the cover plate 3. Ultrasonic probes 9 are installed on both sides of the inner cavity of the velocity measuring tube 8 through through slots. The bottom of the outer surface of the velocity measuring tube 8 is threaded with an internal threaded sleeve 25 through a threaded part. The bottom of the internal threaded sleeve 25 is fixedly connected to a filter cylinder 10. An installation ring 11 is placed at the bottom of the inner cavity of the velocity measuring tube 8. The top and bottom of the inner cavity of the installation ring 11 are respectively installed with a first rectifier tube bundle 12 and a second rectifier tube bundle 13. The first rectifier tube bundle 12 and the second rectifier tube bundle 13 are composed of multiple parallel pipes or grid-like structures, which can sort and rectify the flue gas, making the originally turbulent flue gas flow more uniform and stable, thereby providing stable flow field conditions for the ultrasonic probe 9 to accurately measure the flue gas velocity.

[0023] Furthermore, in order to guide the smooth flow of flue gas, the top of the filter cylinder 10 is provided with an annular mounting groove 14 that cooperates with the mounting ring 11. The bottom of the filter cylinder 10 is fixedly connected to a guide cone 15, the bottom of the guide cone 15 is fixedly connected to a fixing rod 16, the bottom end of the fixing rod 16 is fixedly connected to a front baffle 17, and the front baffle 17 is hemispherical. The outer periphery of the fixing rod 16 is fixedly fitted with a rear baffle 18.

[0024] It should be noted that the two ultrasonic probes 9 are set at an angle to each other. The monitor measures the flue gas velocity based on the time difference method of the ultrasonic probes 9. One of the two ultrasonic probes, which are set at an angle to each other, emits ultrasonic waves and the other receives ultrasonic waves. When the flue gas flows, the speed of the ultrasonic waves propagating in the downstream direction increases due to the flow of the flue gas, while the speed of the ultrasonic waves propagating in the upstream direction decreases. By accurately measuring the time difference of the ultrasonic waves traveling the same distance in the downstream and upstream directions, and combining the geometric dimensions of the velocity measuring tube 8 and other parameters, the flue gas velocity can be calculated according to the formula.

[0025] To facilitate the installation and removal of the mounting ring 11, an annular limiting plate 19, which is used in conjunction with the mounting ring 11, is fixedly connected to the side wall of the inner cavity of the speed measuring tube 8.

[0026] Furthermore, in order to improve the stability of the front baffle 17 during the flue gas monitoring process, a vertical groove 20 is provided at the bottom of the front baffle 17, and an annular locking groove 21 connected to the vertical groove 20 is provided inside the front baffle 17. A crossbar 22 is fixedly connected between the two sides of the bottom of the inner cavity of the housing 1, and a T-shaped rod 23 that cooperates with the vertical groove 20 and the annular locking groove 21 is fixedly connected to the top of the crossbar 22.

[0027] During operation, the monitoring instrument needs to be installed in advance. The operator first inverts the speed measuring tube 8 and inserts the mounting ring 11 into it. The annular limiting plate 19 limits the mounting ring 11. Then, the filter cartridge 10 is installed onto the speed measuring tube 8 through the internal threaded sleeve 25. After the filter cartridge 10 and speed measuring tube 8 are installed, the mounting ring 11 will simultaneously embed into the annular mounting groove 14. Next, the cover plate 3 is placed above the annular positioning block 2 in the designated position. At this time, the vertical groove 20 at the bottom of the front baffle 17 aligns with the T-shaped rod 23, and the cover plate 3... During placement on the annular positioning block 2, the T-shaped rod 23 moves downward and inserts into the vertical groove 20 and the annular locking groove 21. Then, the cover plate 3 rotates 90 degrees, aligning the screw 4 with the threaded groove 5. Simultaneously, the cover plate 3, through the speed measuring tube 8, filter cylinder 10, and fixing rod 16, drives the front baffle 17 to rotate, causing the lateral member of the T-shaped rod 23 to enter the annular locking groove 21. This completes the limiting of the front baffle 17. The groove wall of the annular locking groove 21 restricts the lateral member of the T-shaped rod 23 from the lateral direction, thereby lifting the front... The stability of baffle 17 during monitoring; screw the screw 4 into the threaded groove 5, fix the cover plate 3 onto the housing 1, and simultaneously embed the annular rubber sealing ring 6 into the annular groove 7 to ensure sealing. Install the air inlet 24 at the bottom of the housing 1 at the factory's flue gas outlet, ensuring a tight connection to prevent flue gas leakage, and then flue gas velocity monitoring can be performed; after the monitor has been running for a period of time, if it is necessary to clean or repair the inside of the housing 1, first rotate the screw 4 to separate it from the threaded groove 5, and then rotate the cover plate 3 90 degrees. Simultaneously, the front baffle 17 is rotated via the speed measuring tube 8, filter cylinder 10, and fixing rod 16, causing the horizontal member of the T-shaped rod 23 to disengage from the annular locking groove 21 and align with the vertical groove 20. The cover plate 3 is then removed upwards. At this point, the T-shaped rod 23 disengages from the annular locking groove 21 and the vertical groove 20, allowing the filter cylinder 10, front baffle 17, and rear baffle 18 to be removed from the housing 1. Subsequently, the filter cylinder 10 can be rotated to separate it from the speed measuring tube 8, facilitating the removal of the mounting ring 11. This allows for convenient cleaning, maintenance, or replacement of each component.

Claims

1. A flue gas velocity monitor, comprising a housing (1) and a velocity measuring tube (8), characterized in that: The outer periphery of the speed measuring tube (8) is fixedly connected to a cover plate (3). The top of the housing (1) is connected to an annular positioning block (2) that cooperates with the cover plate (3) through an opening. Both sides of the top of the cover plate (3) are threadedly connected to screws (4) through threaded through holes. Both sides of the top of the annular positioning block (2) are provided with threaded grooves (5) that cooperate with the screws (4). An annular rubber sealing ring (6) is installed at the bottom of the cover plate (3). The top of the annular positioning block (2) is provided with an annular groove (7) that cooperates with the annular rubber sealing ring (6). The top of the cover plate (3) is connected to an annular positioning block (2) through an opening. A speed measuring tube (8) is installed in the through hole. Ultrasonic probes (9) are installed on both sides of the inner cavity of the speed measuring tube (8) through slots. An internal thread sleeve (25) is threaded to the bottom of the outer surface of the speed measuring tube (8) through a threaded part. A filter cylinder (10) is fixedly connected to the bottom of the internal thread sleeve (25). An installation ring (11) is placed at the bottom of the inner cavity of the speed measuring tube (8). A first rectifier tube bundle (12) and a second rectifier tube bundle (13) are installed at the top and bottom of the inner cavity of the installation ring (11), respectively. An annular installation groove (14) is opened at the top of the filter cylinder (10) to cooperate with the installation ring (11).

2. A flue gas flow rate monitor according to claim 1, characterised in that: The bottom of the filter cylinder (10) is fixedly connected to a flow guide cone (15), the bottom of the flow guide cone (15) is fixedly connected to a fixing rod (16), the bottom end of the fixing rod (16) is fixedly connected to a front baffle (17), and the front baffle (17) is hemispherical. The outer periphery of the fixing rod (16) is fixedly fitted with a rear baffle (18).

3. A flue gas flow rate monitor according to claim 1, characterised in that: The inner wall of the speed measuring tube (8) is fixedly connected to an annular limiting plate (19) that cooperates with the mounting ring (11).

4. A flue gas flow rate monitor according to claim 2, characterised in that: The bottom of the front baffle (17) is provided with a vertical groove (20), and the interior of the front baffle (17) is provided with an annular locking groove (21) that communicates with the vertical groove (20). A crossbar (22) is fixedly connected between the two sides of the bottom of the inner cavity of the housing (1), and a T-shaped rod (23) that cooperates with the vertical groove (20) and the annular locking groove (21) is fixedly connected to the top of the crossbar (22).

5. A flue gas velocity monitor according to claim 1, characterized in that: An air inlet (24) is provided at the bottom of the housing (1).

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