Micro-flow gas vortex shedding flowmeter

Abstract

The utility model discloses a micro-flow gas vortex shedding flowmeter, which relates to the technical field of vortex shedding flowmeters and comprises a shell, the top of the shell is fixedly connected with a threaded section, the top of the threaded section is in threaded connection with a threaded cover, one end of the bottom of the threaded cover is fixedly connected with a vortex shedding generation baffle, and the other end of the bottom of the threaded cover is fixedly connected with a vortex shedding baffle. The other end of the bottom of the threaded cover is fixedly connected with a micro flow sensor, a signal amplifier is fixedly connected in a cavity of the threaded cover, a system module is fixedly connected in the cavity of the threaded cover, and the threaded cover is fixedly connected with a display meter. According to the shell provided by the utility model, on the basis of carrying out damping protection on the joint of the pipeline and the bracket to avoid the influence on the precision, the monitoring assembly can be quickly separated to be cleaned or maintained, so that the problems that the measurement precision is reduced due to the vibration interference of the pipeline or the mounting bracket in the existing micro-flow gas vortex shedding flowmeter; and the monitoring assembly has a complex integrated structure and is inconvenient to disassemble and maintain.

Description

Technical Field

[0001] This utility model relates to the field of vortex flow meter technology, specifically to a micro-flow gas vortex flow meter. Background Technology

[0002] A micro-flow gas vortex flow meter is a measuring instrument that measures micro-flow gas by detecting the Karman vortex frequency generated when fluid flows through a vortex generator, and is equipped with signal amplification, system processing, and display functions.

[0003] Existing micro-flow gas vortex flow meters are susceptible to vibration interference transmitted from pipelines or mounting brackets during use, leading to decreased measurement accuracy. Vibrations caused by pump and compressor operation and changes in gas flow velocity are transmitted to the flow meter through pipelines, interfering with the vortex generator that operates based on the Karman vortex street principle, disrupting flow field stability, distorting the Karman vortex street morphology, and making it difficult for the sensor to accurately detect the vortex frequency. In micro-flow measurement, the pulse signal is weak, and interference signals are easily superimposed, resulting in increased instrument coefficient error and seriously affecting measurement reliability. Furthermore, the monitoring components are inconvenient to disassemble and maintain. They often adopt complex integrated structures, fastened with multiple bolts or welded connections. Cleaning impurities and performing repairs and replacements require the removal of numerous parts using various tools, which not only affects maintenance efficiency and prolongs downtime, but also increases maintenance costs and may damage the equipment, reducing its service life. Utility Model Content

[0004] In view of the problems existing in the current micro-flow gas vortex flow meter, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a micro-flow gas vortex flow meter, which solves the problems of decreased measurement accuracy caused by vibration interference from pipelines or mounting brackets in existing micro-flow gas vortex flow meters, and the inconvenience of disassembly and maintenance due to the complex integrated structure of the monitoring components.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A micro-flow gas vortex flow meter includes a housing, a threaded section fixedly connected to the top of the housing, a threaded cover threadedly connected to the top of the threaded section, a vortex generating baffle fixedly connected to one bottom end of the threaded cover, a micro-flow sensor fixedly connected to the other bottom end of the threaded cover, a signal amplifier fixedly connected to the cavity of the threaded cover, a system module fixedly connected to the cavity of the threaded cover, and a display meter fixedly connected to the threaded cover.

[0008] A support column is fixedly connected to the bottom of the housing, and a mounting base is inserted into the bottom of the support column. A shock-absorbing mechanism is provided between the mounting base and the support column. A threaded end is fixedly connected to one end of the housing, and an air intake treatment housing device is threaded to one end of the threaded end. Metal bellows are fixedly connected to the side walls of the housing and the air intake treatment housing device. A connecting flange is fixedly connected to one end of each of the two metal bellows. A limiting mechanism is provided between the threaded cover and the top of the housing and the air intake treatment housing device and the bottom of the housing.

[0009] Preferably, the shock absorption mechanism includes a support base, a rubber shock-absorbing washer, a friction sleeve, and a hydraulic spring damper. The bottom of the cavity of the mounting base is fixedly connected to the support base, the top of the support base is fixedly connected to the rubber shock-absorbing washer, the top of the rubber shock-absorbing washer is fixedly connected to the bottom of the support column, the bottom of the support column is fixedly connected to the friction sleeve, the inner sidewall of the friction sleeve is friably connected to the outer sidewall of the support base, and the bottom of the cavity of the support base is fixedly connected to the hydraulic spring damper, the top of the hydraulic spring damper is fixedly connected to the bottom of the support column.

[0010] Preferably, the limiting mechanism includes a limiting seat, a limiting plate, a limiting threaded opening, and a limiting screw. The top and bottom of the housing are fixedly connected to the limiting seat, and the threaded cover and the side wall of the air intake treatment housing are fixedly connected to the limiting plate. The surfaces of the limiting seat and the limiting plate at both ends are provided with corresponding limiting threaded openings, and the limiting screw is threadedly connected to them.

[0011] Preferably, the air intake treatment housing device includes a conical shell, and threaded mounting ports are provided in the cavity and sidewalls of the conical shell, and a filter screen and a honeycomb guide plate are threadedly connected to each other, with the filter screen and the honeycomb guide plate being positioned correspondingly.

[0012] Furthermore, the surface of the mounting base is provided with multiple mounting holes.

[0013] Preferably, both the housing and the air intake treatment housing are provided with a ceramic anti-corrosion coating inside their cavities.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0015] 1. This utility model utilizes a multi-stage buffer system consisting of rubber damping washers, friction sleeves, and hydraulic spring buffers installed in the damping mechanism to effectively isolate the vibration interference from pipelines and supports. The honeycomb guide plate optimizes the gas flow pattern and reduces the impact of turbulence. At the same time, the micro-flow sensor and signal amplifier accurately detect and amplify weak signals to ensure high accuracy and stability of micro-flow gas measurement.

[0016] 2. This utility model utilizes the threaded section and threaded cover, and the threaded end and the threaded connection with the air intake treatment shell device, combined with the stable fixation of the limiting mechanism, which not only facilitates the quick disassembly of internal components and the air intake treatment shell device for inspection and maintenance, but also prevents loosening caused by vibration. The threaded installation port design of the air intake treatment shell device facilitates the replacement and cleaning of the filter screen and honeycomb guide plate, reducing the difficulty of maintenance.

[0017] 3. This utility model utilizes the ceramic anti-corrosion coating inside the housing and air intake treatment device cavity to effectively resist corrosive gas erosion and extend the service life of the equipment. The multi-mounting hole design on the mounting base can adapt to different mounting surfaces. Combined with the metal corrugated pipe absorbing pipeline thermal deformation and vibration, and the connecting flange ensuring sealing, it ensures that the flow meter is firmly installed and operates reliably. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a front sectional view of the present invention;

[0021] Figure 3 This is a three-dimensional exploded view of the filter component of this utility model;

[0022] Figure 4 This is a partial three-dimensional exploded view of the present invention.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Housing; 2. Threaded section; 3. Threaded cap; 4. Vortex generator baffle; 5. Miniature flow sensor; 6. Signal amplifier; 7. System module; 8. Display; 9. Support column; 10. Mounting base; 11. Threaded end; 12. Intake treatment housing device; 13. Metal bellows; 14. Connecting flange; 15. Support seat; 16. Rubber shock-absorbing washer; 17. Friction sleeve; 18. Hydraulic spring damper; 19. Limit seat; 20. Limit plate; 21. Limit threaded port; 22. Limit screw; 23. Conical shell; 24. Threaded mounting port; 25. Filter screen; 26. Honeycomb guide plate; 27. Mounting hole. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0026] This utility model discloses a micro-flow gas vortex flow meter.

[0027] This utility model provides, for example Figure 1-4 The micro-flow gas vortex flow meter shown includes a housing 1, a threaded section 2 fixedly connected to the top of the housing 1, a threaded cover 3 threadedly connected to the top of the threaded section 2, a vortex generating baffle 4 fixedly connected to one bottom end of the threaded cover 3, a micro-flow sensor 5 fixedly connected to the other bottom end of the threaded cover 3, a signal amplifier 6 fixedly connected to the cavity of the threaded cover 3, a system module 7 fixedly connected to the cavity of the threaded cover 3, and a display meter 8 fixedly connected to the threaded cover 3.

[0028] A support column 9 is fixedly connected to the bottom of the housing 1. A mounting base 10 is inserted into the bottom of the support column 9. A shock-absorbing mechanism is provided between the mounting base 10 and the support column 9. A threaded end 11 is fixedly connected to one end of the housing 1. An air intake treatment shell device 12 is threadedly connected to one end of the threaded end 11. Metal bellows 13 are fixedly connected to the side walls of both the housing 1 and the air intake treatment shell device 12. A connecting flange 14 is fixedly connected to one end of each of the two metal bellows 13. Limiting mechanisms are provided between the threaded cover 3 and the top of the housing 1 and the air intake treatment shell device 12 and the bottom of the housing 1. The threaded connection between the threaded section 2 and the threaded cover 3 facilitates disassembly and installation, and makes it convenient to maintain and repair the internal components. The vortex generating baffle 4 can generate a stable vortex phenomenon in the gas, providing an accurate measurement signal for the micro flow sensor 5. The micro flow sensor 5 can accurately detect micro-flow gas. The signal amplifier 6 can amplify the weak signal output by the sensor, improving the stability and reliability of the signal. The system module 7 is used to realize the control of the entire flow meter. The flow meter features a control and data processing system. A display table 8 allows operators to intuitively read gas flow data, improving ease of use. A support column 9, working in conjunction with the mounting base 10, provides stable support for the flow meter. A shock-absorbing mechanism effectively reduces interference from pipe or mounting bracket vibrations, improving measurement accuracy. A threaded connection between the threaded end 11 and the inlet treatment housing 12 facilitates installation and disassembly, aiding in maintenance. A metal bellows 13, with its good flexibility, absorbs pipe thermal deformation and mechanical vibration, reducing the impact of external vibrations on the flow meter. A connecting flange 14 facilitates connection to the pipe, ensuring a tight seal. A limiting mechanism ensures a secure connection between the threaded cap 3, the inlet treatment housing 12, and the housing 1, preventing loosening due to vibration and ensuring the overall stability of the flow meter structure. This solves the problems of decreased measurement accuracy caused by pipe or mounting bracket vibrations in existing micro-flow gas vortex flow meters, and the inconvenience of disassembly and maintenance due to the complex integrated structure of the monitoring components.

[0029] To reduce measurement errors caused by vibration, such as Figure 1-3The damping mechanism includes a support base 15, rubber damping washers 16, friction sleeves 17, and hydraulic spring buffers 18. The support base 15 is fixedly connected to the bottom of the cavity of the mounting base 10. The rubber damping washers 16 are fixedly connected to the top of the support base 15. The top of the rubber damping washers 16 is fixedly connected to the bottom of the support column 9. The friction sleeve 17 is fixedly connected to the bottom of the support column 9. The inner wall of the friction sleeve 17 is in frictional contact with the outer wall of the support base 15. A hydraulic spring buffer 18 is fixedly connected to the bottom of the cavity of the support base 15. The top of the impactor 18 is fixedly connected to the bottom of the support column 9. The rubber damping washer 16 absorbs vibration energy through elastic deformation, playing a primary damping role. The friction sleeve 17 and the support seat 15 are connected by friction to consume some of the vibration kinetic energy. The hydraulic spring buffer 18 uses hydraulic damping and spring elasticity to achieve multi-stage buffering and absorption of vibration. The three work together to significantly reduce the impact of external vibration on the flow meter, reduce measurement errors caused by vibration, and improve the accuracy and stability of small flow gas measurement.

[0030] To prevent the threaded connection from loosening, such as Figure 1 and 2 As shown, the limiting mechanism includes a limiting seat 19, a limiting plate 20, a limiting threaded opening 21, and a limiting screw 22. The top and bottom of the housing 1 are fixedly connected to the limiting seat 19, and the side walls of the threaded cover 3 and the air intake treatment housing device 12 are fixedly connected to the limiting plate 20. The surfaces of the limiting seats 19 and the limiting plate 20 at both ends are provided with corresponding limiting threaded openings 21, and the limiting screw 22 is threadedly connected. By using the cooperation between the limiting screw 22 and the limiting threaded opening 21, the threaded cover 3 and the air intake treatment housing device 12 are firmly fixed to the housing 1, which enhances the connection stability between the components, prevents the components from loosening or shifting due to vibration, ensures the structural stability of the flow meter during operation, and ensures that the measurement accuracy is not affected by the loose connection.

[0031] To achieve both filtration and flow guidance, and to facilitate the replacement and cleaning of both the filtration and flow guidance components, such as... Figure 1 , 2 As shown in Figure 4, the air intake treatment housing device 12 includes a conical housing 23. Threaded mounting ports 24 are provided inside the cavity and on the side walls of the conical housing 23, and are respectively threadedly connected to a filter screen 25 and a honeycomb guide plate 26. The filter screen 25 and the honeycomb guide plate 26 are positioned correspondingly. The filter screen 25 can effectively filter impurities and particles in the gas, preventing them from entering the flow meter and avoiding damage to components such as the micro-flow sensor 5. The honeycomb guide plate 26 can guide the gas flow, allowing the gas to flow evenly and stably into the housing 1, reducing the impact of gas turbulence on the measurement results and further improving the accuracy of micro-flow gas measurement. The threaded mounting ports 24 facilitate the disassembly and replacement of the filter screen 25 and the honeycomb guide plate 26, making maintenance and cleaning convenient.

[0032] To ensure secure installation on different mounting surfaces, such as Figure 1 As shown, the surface of the mounting base 10 is provided with multiple mounting holes 27. The multiple mounting holes 27 make it easy to securely install the mounting base 10 on different mounting surfaces by means of bolts or other connecting parts, thereby improving the flexibility and adaptability of the flow meter installation and ensuring that the flow meter is installed firmly and reliably.

[0033] To extend the service life of the flow meter, such as Figure 1 , 2 As shown in Figure 4, both the housing 1 and the air intake treatment housing 12 are provided with a ceramic anti-corrosion coating. The ceramic anti-corrosion coating has good corrosion resistance, which can effectively prevent the interior of the housing 1 and the air intake treatment housing 12 from being corroded by corrosive gases, extend the service life of the flow meter, and the coating surface is smooth, making it difficult for impurities to adhere, easy to clean, and reducing the impact of impurity accumulation on gas flow and measurement accuracy.

[0034] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A micro-flow gas vortex flow meter, comprising a housing (1), characterized in that, The top of the housing (1) is fixedly connected to a threaded section (2), the top of the threaded section (2) is threadedly connected to a threaded cover (3), one end of the bottom of the threaded cover (3) is fixedly connected to a vortex generating baffle (4), the other end of the bottom of the threaded cover (3) is fixedly connected to a micro flow sensor (5), a signal amplifier (6) is fixedly connected inside the cavity of the threaded cover (3), a system module (7) is fixedly connected inside the cavity of the threaded cover (3), and a display meter (8) is fixedly connected to the threaded cover (3). A support column (9) is fixedly connected to the bottom of the housing (1), and a mounting base (10) is inserted into the bottom of the support column (9). A shock-absorbing mechanism is provided between the mounting base (10) and the support column (9). A threaded end (11) is fixedly connected to one end of the housing (1), and an air intake treatment shell device (12) is threaded to one end of the threaded end (11). Metal bellows (13) are fixedly connected to the side walls of the housing (1) and the air intake treatment shell device (12). A connecting flange (14) is fixedly connected to one end of each of the two metal bellows (13). A limiting mechanism is provided between the threaded cover (3) and the top of the housing (1) and the bottom of the air intake treatment shell device (12) and the housing (1).

2. The micro-flow gas vortex flow meter according to claim 1, characterized in that, The shock absorption mechanism includes a support base (15), a rubber shock absorber (16), a friction sleeve (17), and a hydraulic spring buffer (18). The bottom of the cavity of the mounting base (10) is fixedly connected to the support base (15). The top of the support base (15) is fixedly connected to the rubber shock absorber (16). The top of the rubber shock absorber (16) is fixedly connected to the bottom of the support column (9). The bottom of the support column (9) is fixedly connected to the friction sleeve (17). The inner sidewall of the friction sleeve (17) is rubbed against the outer sidewall of the support base (15). The bottom of the cavity of the support base (15) is fixedly connected to the hydraulic spring buffer (18). The top of the hydraulic spring buffer (18) is fixedly connected to the bottom of the support column (9).

3. The micro-flow gas vortex flow meter according to claim 1, characterized in that, The limiting mechanism includes a limiting seat (19), a limiting plate (20), a limiting threaded opening (21), and a limiting screw (22). The top and bottom of the housing (1) are fixedly connected to the limiting seat (19), and the side walls of the threaded cover (3) and the air intake treatment housing device (12) are fixedly connected to the limiting plate (20). The surfaces of the limiting seat (19) and the limiting plate (20) at both ends are provided with corresponding limiting threaded openings (21), and the limiting screw (22) is threadedly connected.

4. A micro-flow gas vortex flow meter according to claim 1, characterized in that, The air intake treatment housing device (12) includes a conical shell (23). The conical shell (23) has threaded mounting ports (24) on its cavity and sidewalls, and is threadedly connected to a filter screen (25) and a honeycomb guide plate (26), respectively. The filter screen (25) and the honeycomb guide plate (26) are in corresponding positions.

5. A micro-flow gas vortex flow meter according to claim 1, characterized in that, The surface of the mounting base (10) is provided with a plurality of mounting holes (27).

6. A micro-flow gas vortex flow meter according to claim 1, characterized in that, Both the housing (1) and the air intake treatment housing device (12) are provided with a ceramic anti-corrosion coating inside their cavities.

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