Plug-in gas ultrasonic flowmeter rectifier

Abstract

The invention relates to the technical field of ultrasonic flow meter rectifiers, in particular to a plug-in type gas ultrasonic flow meter rectifier which comprises a shell, an ultrasonic flow meter is arranged on the surface of the shell, a mounting mechanism is arranged at the upper end of the shell, and a second fixing block is fixedly mounted in the center of the interior of the shell. A plurality of connecting grooves for guiding airflow are formed in the second fixing block, a conical groove is formed in the second fixing block, a second conical block is arranged in the conical groove in the second fixing block in a matched mode, a conical auger is arranged on the surface of the second conical block, and a power mechanism is arranged in the shell. A first rectifying mechanism is arranged in the second fixing block, a second rectifying mechanism is arranged at the end, away from the power mechanism, of the second fixing block, and a second fixing disc is fixedly connected to the inner surface of the shell. Air flow can be uniformly dispersed into a plurality of connecting grooves through a conical auger, and vortex can be eliminated by rectifying the air flow through a plurality of connecting grooves in a second fixing block.

Description

Technical Field

[0001] The invention relates to the technical field of ultrasonic flowmeter rectifiers, in particular to an insertion type gas ultrasonic flowmeter rectifier. Background Art

[0002] The rectifier is a fluid dynamics optimization device specially designed for insertable gas ultrasonic flowmeters. Its core function is to adjust the irregular fluid movement in the pipeline into a stable and uniform flow state through a specific structure, eliminate the fluid disturbance caused by upstream pipe fittings (such as valves, elbows, reducers), and ensure that the fluid is in a fully developed laminar or near-laminar state in the measuring section. By reducing eddy currents and uneven velocity distribution, the influence of fluid disturbance on the ultrasonic propagation time difference measurement is reduced, thereby improving the measurement accuracy (simulation experiments show that the optimized rectifier can control the measurement error within ±0.3%). When a transient overload occurs inside the flowmeter, the rectifier can disperse the fluid impact force and protect the sensor and measuring element from damage.

[0003] The rectifier of the insertion-type gas ultrasonic flow meter in the prior art adopts a honeycomb structure and fan blade rectification. The honeycomb structure divides the fluid into multiple direct currents, and uses the regular hexagonal cross-section of the honeycomb channel to reduce the generation of eddy currents. In theory, it can significantly reduce flow field disturbances, guide the flow direction of the fluid through the inclination angle of the blades, correct the flow deflection and distortion caused by upstream bends, reducers and other resistance parts, and further stabilize the flow state. The main function of the fan blades is to guide the direction of the airflow, but the ability to eliminate the rotating gas eddy currents (like the whirlpool in the water flow) is limited. Behind complex structures such as multi-bends and reducers, the gas rushes around to form stubborn eddy currents, and the fan blades can only "guide" but not completely "eliminate" them. These eddy currents will cause the ultrasonic signal to "take a detour", resulting in inaccurate measurements, and the eddy currents will scatter the ultrasonic signal, causing large measurement fluctuations.

[0004] The fan blades in the rectifier of the inserted gas ultrasonic flowmeter in the prior art have limited ability to eliminate axial vortices, and the residual vortex intensity may still affect the measurement accuracy. In a strongly disturbed flow field (such as multiple bends, downstream of reducers), the rectifier may not be able to completely eliminate vortices and secondary flows, causing the flowmeter to still be affected by flow field instability and reduced measurement accuracy. In a strongly disturbed flow field such as multiple bends, reducers or pump outlets, the rectifier may not be able to completely eliminate vortices and secondary flows. Eddies will scatter ultrasonic signals, resulting in fluctuations in the propagation time difference measurement. Using only a honeycomb structure combined with fan blades to rectify the airflow will cause residual vortices to remain locally, resulting in vortices still existing in the rectified airflow, and unstable airflow and different flow velocities will cause inaccurate measurements of the gas ultrasonic flowmeter. Eddies and flow velocity changes will scatter ultrasonic signals. Summary of the invention

[0005] In view of the problems in the prior art, the present invention provides an insertion type gas ultrasonic flowmeter rectifier.

[0006] The technical solution adopted by the present invention to solve its technical problems is: an insertion type gas ultrasonic flowmeter rectifier, including a housing, on the surface of the housing is provided an ultrasonic flowmeter, at the upper end of the housing is provided an installation mechanism for installing the rectifier in a pipeline, at the center inside the housing is fixedly installed a second fixing block, inside the second fixing block are provided several connecting grooves for guiding air flow, inside the second fixing block is provided a tapered groove, in the tapered groove inside the second fixing block is fitted a second tapered block, on the surface of the second tapered block is provided a tapered auger, inside the housing is provided a power mechanism for driving the auger, inside the second fixing block is provided a first rectifying mechanism for evenly dispersing the air flow, at one end of the second fixing block away from the power mechanism is provided a second rectifying mechanism for rectifying the air flow not evenly dispersed by the auger, and fixedly connected to the inner surface of the housing is a second fixing disk.

[0007] Preferably, the installation mechanism includes a first fixing block, the lower end of the first fixing block is fixedly connected to the outer surface of the housing, inside the first fixing block is rotatably connected a rotating shaft, the first fixing block is elastically connected to the rotating shaft through a torsion spring, fixedly connected to the surface of the rotating shaft is a movable block, fixedly connected to the surface of the movable block is a baffle plate, and the baffle plate fits with the surface of the first fixing block.

[0008] Preferably, the installation mechanism further includes a connecting rod, fixedly connected to the upper end of the movable block is a connecting rod, fixedly connected to the surface of the connecting rod is a flange plate, engaged inside the flange plate is a bolt, and fixedly connected to the upper end of the connecting rod is a display.

[0009] Preferably, the power mechanism includes a bearing, the outer ring of the bearing is fixedly connected to the inner surface of the housing, the inner ring of the bearing is fixedly connected to a transmission shaft, and fixedly connected to the surface of the transmission shaft is a first fan blade.

[0010] Preferably, the power mechanism further includes a spiral disk, and fixedly connected to the surface of the transmission shaft is also a spiral disk.

[0011] Preferably, the first rectifying mechanism includes a first tapered block, the center of the first tapered block is fixedly connected to the surface of the transmission shaft, one end of the first tapered block is fixedly connected to a second tapered block, and the auger is infinitely close to but does not fit with the second fixing block.

[0012] Preferably, the second rectifying mechanism includes a sleeve, one end of the sleeve is fixedly connected to the second fixing block, inside the sleeve is provided a second fan blade, and the second fan blade is fixedly connected to the transmission shaft.

[0013] Preferably, the second rectifying mechanism further includes a first fixing disk, the inner surface of the sleeve is fixedly connected with the first fixing disk, and several small holes are opened in the first fixing disk.

[0014] Preferably, several honeycomb holes are opened in the second fixing disk.

[0015] Advantages of the present invention: For the plug-in gas ultrasonic flowmeter rectifier of the present invention, the first fan blades provided can rotate driven by the air flow. When the first fan blades rotate driven by the air flow, power will be generated to drive the transmission shaft to rotate. The transmission shaft rotates to drive the spiral disk to guide the air flow to the inner periphery of the housing, facilitating the air flow to enter the space between the second conical block and the second fixing block for rectification. For the plug-in gas ultrasonic flowmeter rectifier of the present invention, the air flow can be evenly dispersed into several connecting grooves through the arrangement of the conical auger. One end of the second fixing block away from the first conical block is circular and several connecting grooves are arranged in a uniform array. The air flow is evenly discharged at one end away from the first conical block through the guidance of several connecting grooves. The air flow passing through the several connecting grooves in the second fixing block for rectification can eliminate eddy currents, thereby achieving the rectification effect. For the plug-in gas ultrasonic flowmeter rectifier of the present invention, when the transmission shaft rotates, it will drive the second fan blades to rotate. The air flow at the center of the end of the auger that has not entered the connecting groove will enter the sleeve. The rotation of the second fan blades will rectify the air flow in the sleeve. A first fixing disk is arranged at the end of the sleeve, and several through circular small holes are arranged inside the first fixing disk. The diameter of the small holes is the same as the diameter of the connecting grooves. After rectification by the small holes and the connecting grooves, the air flow has become very stable. The air flow after rectification by the small holes and the connecting grooves will further pass through the honeycomb holes in the second fixing disk for further rectification. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the drawings and embodiments.

[0017] Figure 1 It is a schematic diagram of the overall structure provided by the present invention; Figure 2 It is a schematic diagram of the connection structure between the housing and the ultrasonic flowmeter; Figure 3 It is a schematic diagram of the connection structure between the movable block and the baffle; Figure 4 It is a schematic diagram of the connection structure between the first fixing block and the rotating shaft; Figure 5 It is a schematic diagram of the connection structure between the transmission shaft and the first conical block; Figure 6 It is a schematic diagram of the connection structure between the second conical block and the auger; Figure 7 Schematic diagram of the connection groove structure; Figure 8 is Figure 7 Schematic diagram of the enlarged structure of part A shown in the figure.

[0018] In the figure: 100, outer shell; 200, ultrasonic flowmeter; 300, installation mechanism; 301, first fixing block; 302, rotating shaft; 303, movable block; 3031, baffle; 304, connecting rod; 305, flange; 306, bolt; 307, display; 400, power mechanism; 401, bearing; 402, transmission shaft; 403, first fan blade; 404, spiral disk; 500, first rectifying mechanism; 501, first conical block; 502, second conical block; 503, auger; 504, second fixing block; 505, connection groove; 600, second rectifying mechanism; 601, sleeve; 602, second fan blade; 603, first fixing disk; 604, small hole; 700, second fixing disk; 701, honeycomb hole. Specific embodiments

[0019] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0020] As Figures 1-8 shown, an insertion-type gas ultrasonic flowmeter rectifier according to the present invention includes an outer shell 100, on the surface of the outer shell 100 is provided an ultrasonic flowmeter 200, at the upper end of the outer shell 100 is provided an installation mechanism 300 for installing the rectifier in a pipeline, at the center of the interior of the outer shell 100 is fixedly installed a second fixing block 504, inside the second fixing block 504 are provided several connection grooves 505 for guiding air flow, inside the second fixing block 504 is provided a tapered groove, inside the tapered groove of the second fixing block 504 is fitted a second conical block 502, on the surface of the second conical block 502 is provided a tapered auger 503, inside the outer shell 100 is provided a power mechanism 400 for driving the auger 503, inside the second fixing block 504 is provided a first rectifying mechanism 500 for evenly dispersing the air flow, at one end of the second fixing block 504 away from the power mechanism 400 is provided a second rectifying mechanism 600 for rectifying the air flow not evenly dispersed by the auger 503, and fixedly connected to the inner surface of the outer shell 100 is a second fixing disk 700.

[0021] The installation mechanism 300 includes a first fixing block 301, the lower end of the first fixing block 301 is fixedly connected to the outer surface of the housing 100, a rotating shaft 302 is rotatably connected inside the first fixing block 301, the first fixing block 301 is elastically connected to the rotating shaft 302 through a torsion spring, a movable block 303 is fixedly connected to the surface of the rotating shaft 302, a baffle 3031 is fixedly connected to the surface of the movable block 303, the baffle 3031 fits the surface of the first fixing block 301, a connecting rod 304 is fixedly connected to the upper end of the movable block 303, a flange 305 is fixedly connected to the surface of the connecting rod 304, a bolt 306 is engaged inside the flange 305, and a display 307 is fixedly connected to the upper end of the connecting rod 304; First, insert the housing 100 into the pipeline through the flange 305 at the upper opening of the pipeline. The housing 100 is circular tubular. Then, connect the housing 100 and the pipeline through the flange 305 and the bolt 306. One end of the first fan blade 403 in the housing 100 is the air inlet end of the air flow, and one end of the ultrasonic flowmeter 200 in the housing 100 is the air outlet end of the air flow. The ultrasonic flowmeter 200 measures the rectified air flow. The first fixing block 301 and the rotating shaft 302 are elastically connected through a torsion spring. When the rectifier is placed into the pipeline, the connecting rod 304 can be folded towards one end of the first fan blade 403 in the housing 100. During this process, the torsion spring between the first fixing block 301 and the rotating shaft 302 will be compressed. The function of the baffle 3031 on the movable block 303 is to prevent the housing 100 from rotating under the action of the air flow.

[0022] The power mechanism 400 includes a bearing 401, the outer ring of the bearing 401 is fixedly connected to the inner surface of the housing 100, a transmission shaft 402 is fixedly connected to the inner ring of the bearing 401, a first fan blade 403 is fixedly connected to the surface of the transmission shaft 402, and a spiral disk 404 is also fixedly connected to the surface of the transmission shaft 402; At this time, the flowing gas in the pipeline will drive the first fan blade 403 to rotate. The rotation of the first fan blade 403 will drive the transmission shaft 402 to rotate. The rotation of the transmission shaft 402 will drive the spiral disk 404 to rotate. The rotation of the spiral disk 404 will guide the air flow in the housing 100 to the surroundings; Through the arranged first fan blade 403, it can rotate under the drive of the air flow. The rotation of the first fan blade 403 under the drive of the air flow will generate power to drive the transmission shaft 402 to rotate. The rotation of the transmission shaft 402 drives the spiral disk 404 to guide the air flow to the inner surroundings of the housing 100, which is convenient for the air flow to enter the rectification between the second tapered block 502 and the second fixing block 504.

[0023] The first rectifying mechanism 500 includes a first conical block 501. The center of the first conical block 501 is fixedly connected to the surface of the transmission shaft 402. One end of the first conical block 501 is fixedly connected to a second conical block 502. The auger 503 is infinitely close to but does not contact the second fixed block 504. When the transmission shaft 402 rotates, it drives the first conical block 501 to rotate. The rotation of the first conical block 501 drives the second conical block 502 to rotate. The rotation of the second conical block 502 drives the auger 503 to rotate. The rotation of the auger 503 along with the rotation of the air flow drives the air flow to rotate around the second fixed block 504, causing the air flow to rotate around the second fixed block 504 and evenly disperse the air flow into the connecting grooves 505. By setting the tip of the first conical block 501 facing the air flow, the air flow can be further guided to the periphery inside the housing 100. The air flow enters the second fixed block 504 from the periphery inside the housing 100. The second fixed block 504 is internally provided with a conical groove. The conical groove inside the second fixed block 504 matches the second conical block 502. An auger 503 is fixedly arranged on the outer surface of the second conical block 502. The auger 503 can guide the air flow to rotate and flow between the second conical block 502 and the second fixed block 504. The air flow rotates around the auger 503 and flows between the second conical block 502 and the second fixed block 504. The auger 503 is infinitely close to but does not contact the second fixed block 504. The air flow rotating around the auger 503 enters the second fixed block 504. Several connecting grooves 505 of the same size are arranged inside the conical groove of the second fixed block 504. The air flow passes through and rotates around the auger 503 and flows between the second conical block 502 and the second fixed block 504, and the air flow continuously enters the several connecting grooves 505. Through the setting of the conical auger 503, the air flow can be evenly dispersed into the several connecting grooves 505. The cross-sectional views of the several connecting grooves 505 are arc-shaped. The connecting grooves 505 guide the air flow in the conical groove of the second fixed block 504 to be discharged from the end far away from the first conical block 501. The end of the second fixed block 504 far away from the first conical block 501 is circular and several connecting grooves 505 are evenly arranged. The air flow is evenly discharged from the end far away from the first conical block 501 under the guidance of the several connecting grooves 505. The air flow is in the several connecting grooves 505 arranged on the surface of the conical groove inside the second fixed block 504. The air flow can be rectified by passing through the several connecting grooves 505 inside the second fixed block 504 to eliminate eddy currents. Through the setting of the conical auger 503, the air flow can be evenly dispersed into the several connecting grooves 505. The end of the second fixed block 504 far away from the first conical block 501 is circular and several connecting grooves 505 are evenly arranged. The air flow is evenly discharged from the end far away from the first conical block 501 under the guidance of the several connecting grooves 505. The air flow can be rectified by passing through the several connecting grooves 505 inside the second fixed block 504 to eliminate eddy currents, thereby achieving the rectifying effect.

[0024] The second rectifying mechanism 600 includes a sleeve 601. One end of the sleeve 601 is fixedly connected to the second fixing block 504. A second fan blade 602 is arranged inside the sleeve 601. The second fan blade 602 is fixedly connected to the transmission shaft 402. A first fixing disk 603 is fixedly connected to the inner surface of the sleeve 601. Several small holes 604 are formed inside the first fixing disk 603. When the transmission shaft 402 rotates, it will drive the second fan blade 602 to rotate. The air flow at the center of the end of the auger 503 that does not enter the connecting groove 505 will enter the sleeve 601. The rotation of the second fan blade 602 will rectify the air flow inside the sleeve 601. A first fixing disk 603 is arranged at the end of the sleeve 601. Several through circular small holes 604 are arranged inside the first fixing disk 603. The diameter of the small holes 604 is the same as the diameter of the connecting groove 505. After being rectified by the small holes 604 and the connecting groove 505, the air flow has become very stable.

[0025] Several honeycomb holes 701 are formed inside the second fixing disk 700. The air flow rectified by the small holes 604 and the connecting groove 505 will further pass through the honeycomb holes 701 inside the second fixing disk 700 for further rectification, so that the air flow reaches a stable state after passing through the further rectification of the honeycomb holes 701. At this time, the stable air flow is measured by the ultrasonic flowmeter arranged at the end of the outer shell 100. The honeycomb structure can significantly improve the measurement accuracy and flow field stability of the insertion type gas ultrasonic flowmeter 200 by dividing the fluid, suppressing eddy currents and homogenizing the flow field.

[0026] Working principle: When the present invention is in use, first insert the outer shell 100 into the pipeline through the flange 305 at the opening of the pipeline. The outer shell 100 is in a circular tubular shape. Then connect the outer shell 100 and the pipeline through the flange 305 and the bolt 306. One end of the first fan blade 403 inside the outer shell 100 is the air inlet end of the air flow, and one end of the ultrasonic flowmeter 200 inside the outer shell 100 is the air outlet end of the air flow. The ultrasonic flowmeter 200 measures the rectified air flow. The first fixing block 301 and the rotating shaft 302 are elastically connected through a torsion spring. When the rectifier is placed in the pipeline, the connecting rod 304 can be folded towards one end of the first fan blade 403 inside the outer shell 100. During this process, the torsion spring between the first fixing block 301 and the rotating shaft 302 will be compressed. The baffle 3031 on the movable block 303 is used to prevent the outer shell 100 from rotating under the action of the air flow.

[0027] At this time, the flowing gas in the pipeline drives the first fan blade 403 to rotate. The rotation of the first fan blade 403 drives the transmission shaft 402 to rotate. The rotation of the transmission shaft 402 drives the spiral disk 404 to rotate. The rotation of the spiral disk 404 guides the air flow in the housing 100 to the surroundings. By setting the first fan blade 403, it can rotate driven by the air flow. The rotation of the first fan blade 403 driven by the air flow generates power to drive the transmission shaft 402 to rotate. The rotation of the transmission shaft 402 drives the spiral disk 404 to guide the air flow to the inner surroundings of the housing 100, facilitating the air flow to enter the rectification between the second conical block 502 and the second fixing block 504.

[0028] When the transmission shaft 402 rotates, it drives the first conical block 501 to rotate. The rotation of the first conical block 501 drives the second conical block 502 to rotate. The rotation of the second conical block 502 drives the auger 503 to rotate. The rotation of the auger 503 along the rotation of the air flow drives the air flow to rotate around the second fixed block 504, causing the air flow to rotate around the second fixed block 504 and evenly disperse the air flow into the connection groove 505; by setting the tip of the first conical block 501 facing the air flow, the air flow can be further guided to the inner periphery of the housing 100. The air flow enters the second fixed block 504 from the inner periphery of the housing 100. The second fixed block 504 is provided with a conical groove inside. The conical groove inside the second fixed block 504 matches the second conical block 502. An auger 503 is fixedly arranged on the outer surface of the second conical block 502. The auger 503 can guide the air flow to rotate and flow between the second conical block 502 and the second fixed block 504. The air flow rotates around the auger 503 and flows between the second conical block 502 and the second fixed block 504. The distance between the auger 503 and the second fixed block 504 is infinitely close but does not fit. The air flow rotating around the auger 503 enters the second fixed block 504. Several connection grooves 505 are arranged in the conical groove inside the second fixed block 504. The sizes of the several connection grooves 505 are the same. The air flow passes through and rotates around the auger 503 and flows between the second conical block 502 and the second fixed block 504, and the air flow continuously enters the several connection grooves 505. Through the setting of the conical auger 503, the air flow can be evenly dispersed into the several connection grooves 505. The cross-sectional view of the several connection grooves 505 is arc-shaped. The connection grooves 505 guide the air flow in the conical groove of the second fixed block 504 to be discharged from the end far away from the first conical block 501. The end of the second fixed block 504 far away from the first conical block 501 is circular and several connection grooves 505 are evenly arranged. The air flow is evenly discharged from the end far away from the first conical block 501 under the guidance of the several connection grooves 505. The air flow is in the several connection grooves 505 arranged on the conical groove surface inside the second fixed block 504. The air flow can be rectified through the several connection grooves 505 inside the second fixed block 504 to eliminate eddy currents; through the setting of the conical auger 503, the air flow can be evenly dispersed into the several connection grooves 505. The end of the second fixed block 504 far away from the first conical block 501 is circular and several connection grooves 505 are evenly arranged. The air flow is evenly discharged from the end far away from the first conical block 501 under the guidance of the several connection grooves 505. The air flow can be rectified through the several connection grooves 505 inside the second fixed block 504 to eliminate eddy currents, so as to achieve the rectification effect.

[0029] While the transmission shaft 402 rotates, it drives the second fan blade 602 to rotate. The air flow at the center of the end of the auger 503 that does not enter the connection groove 505 will enter the sleeve 601. The rotation of the second fan blade 602 rectifies the air flow in the sleeve 601. A first fixing plate 603 is provided at the end of the sleeve 601. Inside the first fixing plate 603, there are several circular through holes 604. The diameter of the through holes 604 is the same as the diameter of the connection groove 505. After being rectified by the through holes 604 and the connection groove 505, the air flow has become very stable.

[0030] The air flow rectified by the through holes 604 and the connection groove 505 will further pass through the honeycomb holes 701 in the second fixing plate 700 for further rectification, so that the air flow reaches a stable state after passing through the further rectification of the honeycomb holes 701. At this time, the stable air flow is measured by the ultrasonic flow meter provided at the end of the housing 100. The honeycomb structure significantly improves the measurement accuracy and flow field stability of the insertion type gas ultrasonic flow meter 200 by dividing the fluid, suppressing eddy currents and homogenizing the flow field.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope claimed by the present invention. The scope claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An insertion-type gas ultrasonic flowmeter rectifier, comprising a housing (100), wherein an ultrasonic flowmeter (200) is disposed on the surface of the housing (100), and is characterized in that: An installation mechanism (300) for installing a rectifier in a pipeline is provided at the upper end of the housing (100). A second fixing block (504) is fixedly installed at the center inside the housing (100). Several connecting grooves (505) for guiding air flow are provided inside the second fixing block (504). A tapered groove is provided inside the second fixing block (504). A second tapered block (502) is fitted in the tapered groove inside the second fixing block (504). A screw conveyor (503) in the shape of a cone is provided on the surface of the second tapered block (502). A power mechanism (400) for driving the screw conveyor (503) is provided inside the housing (100). A first rectifying mechanism (500) for evenly dispersing air flow is provided inside the second fixing block (504). A second rectifying mechanism (600) for rectifying the air flow that is not evenly dispersed by the screw conveyor (503) is provided at one end of the second fixing block (504) away from the power mechanism (400). A second fixing disk (700) is fixedly connected to the inner surface of the housing (100).

2. The plug-in gas ultrasonic flowmeter rectifier according to claim 1, wherein: The installation mechanism (300) includes a first fixing block (301). The lower end of the first fixing block (301) is fixedly connected to the outer surface of the housing (100). A rotating shaft (302) is rotatably connected inside the first fixing block (301). The first fixing block (301) is elastically connected to the rotating shaft (302) through a torsion spring. A movable block (303) is fixedly connected to the surface of the rotating shaft (302). A baffle (3031) is fixedly connected to the surface of the movable block (303). The baffle (3031) fits against the surface of the first fixing block (301).

3. The plug-in gas ultrasonic flowmeter rectifier according to claim 2, characterized in that: The installation mechanism (300) further includes a connecting rod (304). The upper end of the movable block (303) is fixedly connected to the connecting rod (304). A flange (305) is fixedly connected to the surface of the connecting rod (304). A bolt (306) is engaged inside the flange (305). A display (307) is fixedly connected to the upper end of the connecting rod (304).

4. The plug-in gas ultrasonic flowmeter rectifier according to claim 3, characterized in that: The power mechanism (400) includes a bearing (401). The outer ring of the bearing (401) is fixedly connected to the inner surface of the housing (100). A transmission shaft (402) is fixedly connected to the inner ring of the bearing (401). A first fan blade (403) is fixedly connected to the surface of the transmission shaft (402).

5. An insertion type gas ultrasonic flowmeter rectifier according to claim 4, characterized in that: The power mechanism (400) further includes a spiral disk (404). The spiral disk (404) is also fixedly connected to the surface of the transmission shaft (402).

6. The plug-in gas ultrasonic flowmeter rectifier according to claim 5, characterized in that: The first rectifying mechanism (500) includes a first tapered block (501). The center of the first tapered block (501) is fixedly connected to the surface of the transmission shaft (402). One end of the first tapered block (501) is fixedly connected to the second tapered block (502). The screw conveyor (503) is infinitely close to but does not fit against the second fixing block (504).

7. An insertion-type gas ultrasonic flowmeter rectifier according to claim 6, characterized in that: The second rectifying mechanism (600) includes a sleeve (601), one end of the sleeve (601) is fixedly connected to the second fixing block (504), a second fan blade (602) is arranged inside the sleeve (601), and the second fan blade (602) is fixedly connected to the transmission shaft (402).

8. The plug-in gas ultrasonic flowmeter rectifier according to claim 7, characterized in that: The second rectifying mechanism (600) further includes a first fixing disk (603), the inner surface of the sleeve (601) is fixedly connected to the first fixing disk (603), and several small holes (604) are formed inside the first fixing disk (603).

9. The rectifier of the plug-in gas ultrasonic flowmeter according to claim 1, characterized in that: Several honeycomb holes (701) are formed inside the second fixing disk (700).

Images