A gas flow meter with convenient filter replacement

Abstract

The utility model relates to a gas flowmeter of filter convenient to replace belongs to gas flow measurement technical field, specifically, including flowmeter body, the flowmeter body is equipped with air inlet channel and air outlet channel, its characterized in that: the air inlet end of flowmeter body is equipped with an installation cavity, through the combination of '' straight -in type '' structure and quick -lock mechanism, only needs one step plug -in action when replacing filter, does not need any tool, the whole process can be completed within several seconds, has greatly promoted maintenance efficiency, has reduced downtime, independent right claim has protected the core idea that will quick change function is integrated in the air inlet end of flowmeter body, has covered many kinds of concrete realization mode such as split type (through quick -change connector) and integral type, the protection scope is more wide, the '' sealing element '' is as necessary technical features, fundamentally guarantees the sealing of gas measurement system, avoids the inaccuracy of measurement due to leakage, ensures the normal work of equipment.

Description

Technical Field

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

[0002] Gas flow meters are widely used in industrial process control, environmental monitoring, and laboratory research. Their core function is to accurately measure gas flow. To ensure measurement accuracy and extend instrument life, a filter is usually installed at the gas inlet to remove impurities such as particulate matter and oil mist from the gas.

[0003] Currently, most filter-type gas flow meters on the market use threaded screw-on filters. This method has obvious drawbacks: First, the replacement operation is cumbersome, requiring the old filter to be unscrewed and the new filter to be screwed on, which is time-consuming and laborious, especially inconvenient when installation space is limited; second, repeated screwing can damage the threads or sealing surfaces, posing a risk of leakage after long-term use; third, maintenance lacks visibility, making it difficult for users to intuitively judge the saturation state of the filter element, which can easily lead to untimely replacement affecting measurement, or premature replacement increasing costs. Therefore, there is an urgent need for a gas flow meter that can achieve rapid filtering, tool-free assembly and disassembly, reliable sealing, and visible status. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention provides a gas flow meter with easy filter replacement, which overcomes the shortcomings of the prior art and solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a gas flow meter with a convenient filter replacement, comprising a flow meter body, wherein the flow meter body is provided with an inlet channel and an outlet channel, and, importantly, also includes a quick-change connector. The quick-change connector includes a connector body connected to the air intake channel, and the connector body has an installation cavity inside. A filter assembly is detachably inserted into the mounting cavity. The filter assembly includes a filter housing and a filter element disposed within the filter housing. The air inlet end of the filter housing is provided with an air inlet interface connected to an external pipeline, and the air outlet end is provided with an air outlet interface communicating with the air inlet channel. A quick-locking mechanism is provided between the flow meter body and the filter assembly for quickly locking or separating the two. A seal is also provided between the flow meter body and the filter assembly to seal the connection between the two.

[0006] As a preferred embodiment of this utility model, the quick-lock mechanism is a rotary bayonet structure, including a guide protrusion on the outer wall of the filter shell and an L-shaped guide groove on the inner wall of the mounting cavity port that is adapted to the guide protrusion.

[0007] As a preferred embodiment of this utility model, there are two L-shaped guide grooves, which are symmetrically arranged on both sides of the mounting cavity port.

[0008] As a preferred embodiment of this utility model, the sealing element is an O-ring.

[0009] As a preferred embodiment of this utility model, the bottom of the mounting cavity is provided with a sealing groove for accommodating the O-ring.

[0010] As a preferred embodiment of this utility model, the filter shell is made of a transparent or translucent material.

[0011] As a preferred embodiment of this utility model, the outer wall of the filter shell is provided with anti-slip texture.

[0012] As a preferred technical solution of this utility model, the mounting cavity is connected to the flow meter body through an independent quick-change connector, and the quick-change connector is fixed to the air intake channel by means of threads, snaps, or integral molding.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. By combining the "direct insertion" structure with the quick-lock mechanism, the filter replacement only requires one insertion and removal action, without any tools. The entire process can be completed in a few seconds, which greatly improves maintenance efficiency and reduces downtime.

[0014] 2. The independent claims protect the core concept of integrating the quick-change function into the air inlet of the flow meter body, covering various specific implementation methods such as split type (through quick-change connector) and integrated type, and the scope of protection is broader.

[0015] 3. By making "sealing components" an essential technical feature, the airtightness of the gas measurement system is fundamentally guaranteed, avoiding measurement inaccuracies caused by leakage and ensuring the normal operation of the equipment.

[0016] 4. The transparent filter housing design allows users to directly observe the color change of the filter element, enabling visual management of the filter element saturation. This not only provides timely warnings to avoid pressure loss and measurement errors caused by filter element blockage, but also allows for replacement as needed, saving on consumable costs.

[0017] 5. This design requires minimal modification to the existing flow meter structure, is easy to implement and promote, and has a significant competitive advantage in the market. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model; Figure 3 This is a schematic diagram of the filter assembly of this utility model; Figure 4 This is a schematic diagram of the quick-change connector of this utility model.

[0019] In the diagram: 1. Flow meter body; 11. Inlet channel; 12. Outlet channel; 2. Filter assembly; 21. Filter housing; 211. Air inlet; 212. Air outlet; 213. Guide protrusion; 22. Filter element; 3. Quick-change connector; 31. Connector body; 311. Mounting cavity; 312. Sealing groove; 4. L-shaped guide groove; 5. Sealing ring. Detailed Implementation

[0020] 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. Example

[0021] Please see Figure 1-4 A gas flow meter with easy filter replacement mainly includes a flow meter body 1, a filter assembly 2, and a quick-change connector 3 as an independent component.

[0022] The quick-change connector 3 is fixed to the inlet of the air inlet channel 11 of the flow meter body 1 by a threaded connection. The connector body 31 of the quick-change connector 3 forms a cylindrical mounting cavity 311 inside, and the bottom of the mounting cavity 311 has an annular sealing groove 312.

[0023] The filter assembly 2 includes a cylindrical filter housing 21 and a built-in filter element 22. The filter housing 21 is preferably made of transparent polycarbonate (PC) material to allow observation of the filter element 22. The filter housing 21 has an air inlet 211 at the top and an air outlet 212 at the bottom. The outer wall of the filter housing 21 has guide protrusions 213 and anti-slip textures on the upper part.

[0024] The quick-lock mechanism employs a rotary bayonet structure. At least one guide protrusion 213 is provided on the outer wall of the filter housing 21, and an L-shaped guide groove 4 is correspondingly formed on the inner wall of the mounting cavity 311 port. During installation, the guide protrusion 213 of the filter assembly 2 is aligned with the vertical inlet of the L-shaped guide groove 4 and inserted. After reaching the bottom, it is rotated a certain angle (e.g., 1 / 8 turn or 90°), and the guide protrusion 213 slides into the horizontal locking part of the L-shaped groove, locking the filter assembly 2. The sealing ring 5 is compressed during this process. For replacement, the filter assembly 2 is rotated in the reverse direction to unlock and remove it.

[0025] The seal 5 is an O-ring, which is installed in the sealing groove 312 at the bottom of the mounting cavity 311.

[0026] Working principle: During installation, align the guide protrusion 213 of filter assembly 2 with the vertical inlet of the L-shaped guide groove 4 and insert it. After it reaches the bottom, rotate it a certain angle (such as 1 / 8 turn or 90°), and the guide protrusion 213 will slide into the horizontal locking part of the L-shaped groove, locking the filter assembly 2. The sealing ring 5 is compressed during this process. When replacing, rotate the filter assembly 2 in the opposite direction to unlock and pull it out. At the same time, the end of the filter assembly 2 is pressed against the O-ring seal to form a reliable seal. The gas flow path is: external pipeline → inlet port 211 → inside the filter housing 21 (filtered by the filter element 22) → outlet port 212 → inlet channel 11 → inside the flow meter body 1 → outlet channel 12. Example

[0027] In another embodiment, the mounting cavity 311 can also be directly machined onto the air inlet end of the flowmeter body 1, integrally injection molded or machined with the flowmeter body 1. In this case, the L-shaped guide groove 4 is directly disposed on the air inlet port of the flowmeter body 1. Its quick-locking and sealing principle is exactly the same as in Embodiment 1. This design further reduces the number of parts and makes the structure more compact.

[0028] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gas flow meter with a convenient filter replacement, comprising a flow meter body (1), wherein the flow meter body (1) is provided with an inlet channel (11) and an outlet channel (12), characterized in that: It also includes a quick-change connector (3); The quick-change connector (3) includes a connector body (31) connected to the air intake channel (11), and the connector body (31) is provided with an installation cavity (311). A filter assembly (2) is detachably inserted into the mounting cavity (311). The filter assembly (2) includes a filter housing (21) and a filter element (22) disposed in the filter housing (21). The air inlet end of the filter housing (21) is provided with an air inlet interface (211) connected to an external pipeline, and the air outlet end is provided with an air outlet interface (212) connected to the air inlet channel (11). A quick-locking mechanism is provided between the flow meter body (1) and the filter assembly (2) for quickly locking or separating the two; A seal (5) for sealing the connection between the flow meter body (1) and the filter assembly (2) is also provided.

2. A gas flow meter with a convenient filter replacement according to claim 1, characterized in that: The quick-lock mechanism is a rotating bayonet structure, including a guide protrusion (213) on the outer wall of the filter shell (21) and an L-shaped guide groove (4) on the inner wall of the port of the mounting cavity (311) that is adapted to the guide protrusion (213).

3. A gas flow meter with a convenient filter replacement according to claim 2, characterized in that: There are two L-shaped guide grooves (4), which are symmetrically arranged on both sides of the port of the mounting cavity (311).

4. A gas flow meter with a convenient filter replacement according to claim 1, characterized in that: The sealing element (5) is an O-ring.

5. A gas flow meter with a convenient filter replacement according to claim 4, characterized in that: The bottom of the mounting cavity (311) is provided with a sealing groove (312) for accommodating the O-ring.

6. A gas flow meter with a convenient filter replacement according to claim 1, characterized in that: The filter housing (21) is made of a transparent or translucent material.

7. A gas flow meter with a convenient filter replacement according to claim 1, characterized in that: The outer wall of the filter housing (21) is provided with anti-slip texture.

8. A gas flow meter with a convenient filter replacement according to claim 1, characterized in that: The mounting cavity (311) is connected to the flow meter body (1) through an independent quick-change connector (3), and the quick-change connector (3) is fixed to the air inlet channel (11) by means of threads, snaps or integral molding.

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