Gas flowmeter with filtering structure

Abstract

The utility model relates to a gas flowmeter with a filtering structure, which comprises a flowmeter main body and a filtering assembly, the filtering assembly is communicated with the input end of the flowmeter main body, the filtering assembly comprises a pipe body, a flow guide plate, a filtering cylinder, a cap and a spring, the pipe body is T-shaped, and the flow guide plate is arranged on the pipe body. The horizontal end of the pipe body is connected with the flowmeter body, the flow guide plate is fixedly connected to the middle in the pipe body, the cap is detachably and fixedly connected to the lower end of the pipe body, and the two ends of the spring are fixedly connected with the filter cartridge and the cap respectively. When the gas flow meter is used, flowing gas can be filtered through the filter cartridge in advance, then the situation that impurities in airflow enter the flow meter body to affect use of the flow meter body is reduced, the filter cartridge can shake when airflow input fluctuates, and then the impurities attached to the inner wall of the filter cartridge can shake to fall to the bottom in the filter cartridge to be accumulated; therefore, the replacement and cleaning frequency of the filter cartridge is reduced.

Description

Technical Field

[0001] This utility model relates to the field of gas flow meter technology, specifically a gas flow meter with a filter structure. Background Technology

[0002] Gas flow meters are instruments used to measure the flow rate of gases. They are widely used in various industrial fields to measure the flow rate of various gases such as coal gas, air, nitrogen, acetylene, hydrogen, and natural gas. These flow meters are typically installed in pipelines to record the amount of gas flowing through them, and are crucial for industrial production and process control.

[0003] In a conventional gas flow meter, when airflow enters, it first passes through a guide fluid in an independent mechanism and is accelerated. Under the action of the fluid, and because the turbine blades are at a certain angle to the fluid flow direction, the turbine generates a rotational torque. After overcoming the resistance torque and frictional torque, the turbine begins to rotate. When the torques reach equilibrium and the rotational speed is constant, the turbine's rotational angular velocity is linearly related to the flow rate. Utilizing the principle of electromagnetic induction, the rotating turbine drives the magnetic conductor at the top of the signal generator to periodically change the magnetic resistance, causing a corresponding change in the magnetic field. This induces a pulse signal proportional to the fluid volumetric flow rate at both ends of the coil. This signal is amplified by a preamplifier, shaped, and then input simultaneously with the pressure and temperature signals detected by the pressure and temperature sensors to the flow totalizer for calculation and processing, directly displaying the standard instantaneous volumetric flow rate and total volume.

[0004] Some gas flow meters fail to effectively filter impurities in the gas during use, which can damage the flow meter, shorten its lifespan, and reduce its measurement accuracy. To prevent these problems, a common practice in the current technology is to install a gas filter inside the gas flow meter's inlet pipe to filter the airflow and protect the internal structure of the flow meter. However, because the filter pores lack the ability to remove impurities, the filter needs to be cleaned and replaced frequently. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] This invention provides a gas flow meter with a filtration structure, which solves the problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a gas flow meter with a filtration structure, comprising a flow meter body and a filtration assembly. The filtration assembly is connected to the input end of the flow meter body. The filtration assembly includes a tube, a guide plate, a filter cylinder, a cap, and a spring. The tube is T-shaped, with its horizontal end connected to the flow meter body. The guide plate is fixedly connected to the middle of the tube body. The cap is detachably fixedly connected to the lower end of the tube body. The two ends of the spring are respectively connected and fixed to the filter cylinder and the cap, so that the filter cylinder is movably disposed in the inner cavity of the tube body and simultaneously positioned between the cap and the guide plate. The inner cavity of the filter cylinder is upwardly penetrating, and multiple filter holes communicating with its inner cavity are formed on the outer wall of the filter cylinder. An opening communicating with the inner cavity of the filter cylinder is formed on the guide plate, allowing the filter cylinder to communicate with the tube body through the opening and filter holes.

[0009] Preferably, the tube body includes a connecting section and a flow guiding section. The end of the connecting section near the flow meter body is connected to the flow meter body. The bottom of the connecting section is connected to the top of the flow guiding section. The flow guiding section is inclinedly disposed below the connecting section. The inner diameter of both the connecting section and the flow guiding section is larger than the outer diameter of the filter cartridge. The opening faces the inner cavity of the filter cartridge, and the diameter of the opening is smaller than the inner diameter of the filter cartridge.

[0010] In a further preferred embodiment, a limiting ring is formed on the side of the guide plate facing the filter cylinder, the limiting ring being sleeved on the outer side of the upper end of the filter cylinder, and the inner diameter of the limiting ring being larger than the outer diameter of the filter cylinder.

[0011] In a further preferred embodiment, a first connecting sleeve and a second connecting sleeve are respectively formed on the opposing sides of the filter cylinder and the cap, and the two ends of the spring are respectively inserted into the first connecting sleeve and the second connecting sleeve and fixedly connected thereto.

[0012] In a further preferred embodiment, a transparent observation window is embedded in the outer wall of the guide section, and the observation window faces the filter cartridge.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, the present invention provides a gas flow meter with a filtration structure, which has the following advantages:

[0015] In this invention, the combination of the flow meter body and the filter assembly allows the gas flow meter to pre-filter the flowing gas through the filter cartridge during use, thereby reducing the amount of impurities in the airflow entering the flow meter body and affecting its use. Furthermore, the fluctuation of the airflow input can cause the filter cartridge to vibrate, which can shake off the impurities attached to the inner wall of the filter cartridge and make them accumulate at the bottom of the filter cartridge, thereby reducing the frequency of filter cartridge replacement and cleaning. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a gas flow meter with a filter structure according to the implementation plan;

[0017] Figure 2 This is a schematic diagram of the structure of the filter assembly according to the implementation plan;

[0018] Figure 3 for Figure 2 A schematic diagram of the filter assembly from another angle;

[0019] Figure 4 for Figure 2 A schematic diagram of the structure of the tube in the filter assembly after it has been cut open.

[0020] In the diagram: 10. Flow meter body; 20. Filter assembly; 21. Pipe body; 211. Connecting section; 212. Flow guide section; 22. Flow guide plate; 221. Opening; 222. Limiting ring; 23. Filter cylinder; 231. Filter hole; 232. First connecting sleeve; 24. Cap; 241. Second connecting sleeve; 25. Spring; 26. Observation window. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1 A gas flow meter with a filtration structure includes a flow meter body 10 and a filter assembly 20. The filter assembly 20 is connected to the input end of the flow meter body 10, and during use, the gas flow can pass through the filter assembly 20 and the flow meter body 10 in sequence. The filter assembly 20 is used to filter impurities in the flowing gas to reduce the amount of impurities entering the flow meter body 10 and affecting its use. The flow meter body 10 can adopt existing structures in the prior art, which will not be described in detail here.

[0023] See Figures 2 to 4The filter assembly 20 may include a tube 21, a guide plate 22, a filter cartridge 23, a cap 24, a spring 25, and an observation window 26. The tube 21 is configured in a "T" shape. For example, in this embodiment, the tube 21 includes a connecting section 211 and a guide section 212. The connecting section 211 is horizontal, and its bottom communicates with the top of the guide section 212, which is inclined below the connecting section 211. The horizontal end of the tube 21 is connected to the flow meter body 10, meaning the end of the connecting section 211 closest to the flow meter body 10 communicates with it. The guide plate 22 is fixedly connected to the middle of the tube 21. The cap 24 is detachably fixedly connected to the lower end of the tube 21. The two ends of the spring 25 are respectively connected and fixed to the filter cartridge 23 and the cap 24, allowing the filter cartridge 23 to be movably disposed within the inner cavity of the tube 21 and simultaneously positioned between the cap 24 and the guide plate 22. The inner cavity of the filter cartridge 23 extends upwards, and multiple filter holes 231 communicating with its inner cavity are formed on the outer wall of the filter cartridge 23, allowing the filter cartridge 23 to filter airflow and trap impurities in the airflow. An opening 221 communicating with the inner cavity of the filter cartridge 23 is formed on the guide plate 22. The filter cartridge 23 can be connected to the pipe body 21 through the opening 221 on the guide plate 22 and the multiple filter holes 231 on the filter cartridge 23 itself. That is, the airflow entering the gas flow meter enters the connecting section 211 and then enters the filter cartridge 23 through the opening 221. The filtered airflow flows into the connecting section 211 through the filter holes 231 and enters the flow meter body 10 from the connecting section 211 for measurement. The inner diameters of both the connecting section 211 and the guide section 212 are larger than the outer diameter of the filter cartridge 23. When the airflow causes a disturbance, the force exerted by the airflow on the filter cartridge 23 changes. This, in turn, is caused by the elastic deformation of the spring 25 and the limited space for movement within both the connecting section 211 and the guide section 212, allowing the filter cartridge 23 to vibrate. This dislodges impurities adhering to the inner wall of the filter cartridge 23, causing them to accumulate at the bottom. This reduces the obstruction of airflow caused by accumulated impurities and decreases the frequency of cleaning and replacement of the filter cartridge 23. A transparent observation window 26 is embedded in the outer wall of the guide section 212, facing the filter cartridge 23. The degree of impurity adhesion on the surface of the filter cartridge 23 can be observed through the observation window 26. When the filter cartridge 23 needs to be replaced, the connecting screws between the cap 24 and the guide section 212 are removed, allowing the cap 24 and the filter cartridge 23 to be taken out.

[0024] In this embodiment, the opening 221 on the guide plate 22 faces the inner cavity of the filter cylinder 23, and the diameter of the opening 221 is smaller than the inner diameter of the filter cylinder 23, so that the airflow flowing through the opening 221 can be input into the inner cavity of the filter cylinder 23 for filtration. A limiting ring 222 is formed on the side of the guide plate 22 facing the filter cylinder 23. The limiting ring 222 is sleeved on the outer side of the upper end of the filter cylinder 23, and the inner diameter of the limiting ring 222 is larger than the outer diameter of the filter cylinder 23, so that the limiting ring 222 can be used to auxiliary limit the movement space of the filter cylinder 23.

[0025] In this embodiment, a first connecting sleeve 232 and a second connecting sleeve 241 are formed on the opposite sides of the filter cylinder 23 and the cap 24, respectively. The two ends of the spring 25 are inserted into the first connecting sleeve 232 and the second connecting sleeve 241 and fixedly connected thereto.

[0026] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A gas flow meter with a filter structure, comprising a flow meter body (10), characterized in that, It also includes a filter assembly (20), which is connected to the input end of the flow meter body (10). The filter assembly (20) includes a tube (21), a guide plate (22), a filter cartridge (23), a cap (24), and a spring (25). The tube (21) is T-shaped, and one horizontal end of the tube (21) is connected to the flow meter body (10). The guide plate (22) is fixedly connected to the middle of the tube (21). The cap (24) is detachably fixedly connected to the lower end of the tube (21). The two ends of the spring (25) are connected to the filter cartridge (23) and the cap (24), respectively. The filter cylinder (23) is fixed so that it is movably disposed in the inner cavity of the tube body (21) and simultaneously located between the cap (24) and the guide plate (22). The inner cavity of the filter cylinder (23) extends upward, and multiple filter holes (231) communicating with its inner cavity are formed on the outer wall of the filter cylinder (23). An opening (221) communicating with the inner cavity of the filter cylinder (23) is formed on the guide plate (22), so that the filter cylinder (23) is connected to the tube body (21) through the opening (221) and the filter holes (231).

2. A gas flow meter with a filter structure according to claim 1, characterized in that: The tube body (21) includes a connecting section (211) and a flow guide section (212). The end of the connecting section (211) near the flow meter body (10) is connected to the flow meter body (10). The bottom of the connecting section (211) is connected to the top of the flow guide section (212). The flow guide section (212) is inclinedly arranged below the connecting section (211).

3. A gas flow meter with a filter structure according to claim 2, characterized in that: The inner diameter of the connecting section (211) and the inner diameter of the guide section (212) are both greater than the outer diameter of the filter cylinder (23). The opening (221) faces the inner cavity of the filter cylinder (23), and the diameter of the opening (221) is smaller than the inner diameter of the filter cylinder (23).

4. A gas flow meter with a filter structure according to claim 3, characterized in that: The guide plate (22) forms a limiting ring (222) on the side facing the filter cylinder (23). The limiting ring (222) is sleeved on the outer side of the upper end of the filter cylinder (23), and the inner diameter of the limiting ring (222) is larger than the outer diameter of the filter cylinder (23).

5. A gas flow meter with a filter structure according to any one of claims 1-4, characterized in that: The filter cylinder (23) and the cap (24) have a first connecting sleeve (232) and a second connecting sleeve (241) respectively on their opposite sides. The two ends of the spring (25) are inserted into the first connecting sleeve (232) and the second connecting sleeve (241) respectively and are fixedly connected thereto.

6. A gas flow meter with a filter structure according to any one of claims 2-4, characterized in that: A transparent observation window (26) is embedded on the outer wall of the guide section (212), and the observation window (26) faces the filter cylinder (23).

Images