Flowmeter connector and filter screen matching structure of fuel cell

Abstract

The utility model relates to the field of fuel cells, in particular to a matching structure of a flow meter connector and a filter screen of a fuel cell. The flow meter comprises a flow meter connector and a filter screen. One end of the flowmeter connector is provided with an inner ring face and a step portion located at one end of the inner side of the inner ring face, and a clamping groove is formed in the inner ring face. The filter screen comprises a main body ring part and a net-shaped rib plate part integrally connected to the inner side of the main body ring part, the main body ring part penetrates through the inner side of the inner ring surface, the end of the main body ring part abuts against the step part, and the outer circumferential surface of the main body ring part is provided with a buckling part clamped in the clamping groove. The flow meter connector and the filter screen are designed in a split mode and connected in a buckled mode, the filter screen is convenient to replace, and production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of fuel cells, in particular to a matching structure of a fuel cell flowmeter joint and a filter screen. Background Art

[0002] As an engine system with no pollution and long endurance mileage, a fuel cell system is a device that generates electric energy through the electrochemical reaction of hydrogen and oxygen. Oxygen, as one of the main sources of the fuel cell system, generally adopts external air. Air with a certain flow rate, pressure and humidity is a necessary condition for the continuous and stable output of the fuel cell system. The air system mainly adjusts the air entering the fuel cell in terms of filtration, humidification and pressure. Among them, filtration generally uses an air filter to remove impurities, a flowmeter to detect the air, and a pressure sensor to ensure stable air supply.

[0003] The accuracy of the flowmeter detection needs to be ensured by adding a filter screen. The existing air flowmeter base and the filter screen generally adopt the ways of welding or integral processing. Since the required rib thickness of the filter screen is relatively thin, the integral processing of the two is difficult, and the filter screen is not easy to replace. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problems existing in the background art, and propose a matching structure of a fuel cell flowmeter joint and a filter screen, which adopts a split design of the flowmeter joint and the filter screen and is connected by a buckle, facilitating the replacement of the filter screen and reducing the production cost.

[0005] The technical solution of the utility model, a matching structure of a fuel cell flowmeter joint and a filter screen, includes a flowmeter joint and a filter screen; one end of the flowmeter joint has an inner ring surface and a step portion located at one end inside the inner ring surface, and a clamping groove is arranged on the inner ring surface; the filter screen includes a main ring portion and a reticular rib plate portion integrally connected to the inside of the main ring portion. The main ring portion passes through the inside of the inner ring surface and the end abuts against the step portion, and a buckle portion that is clamped at the clamping groove is arranged on the outer peripheral surface of the main ring portion.

[0006] Preferably, the main ring portion and the inner ring surface are in clearance fit, and a fastening table portion protruding inwards is arranged on the inner ring surface, and the fastening table portion and the main ring portion are in interference fit.

[0007] Preferably, a sliding strip portion is arranged on the inner ring surface along the axial direction, and a sliding groove that is slidably connected to the sliding strip portion is arranged on the outer peripheral surface of the main ring portion.

[0008] Preferably, the diameter of the inner ring surface gradually decreases from the outer end to the inner end along the axial direction.

[0009] Preferably, an annular reinforcing rib portion is arranged on the outer peripheral surface of the flowmeter joint.

[0010] Preferably, the buckle part has a guiding inclined surface distributed on the front side in the assembly direction and a limiting plane distributed on the rear side in the assembly direction, and the limiting plane is perpendicular to the outer peripheral surface of the main body ring part.

[0011] Preferably, the outer peripheral surface of the main body ring part has an assembly surface, and the assembly surface is an inclined surface.

[0012] Preferably, the rib plate part includes a plurality of first rib parts distributed in parallel and a plurality of second rib parts distributed in parallel, and the first rib parts and the second rib parts are perpendicular to each other.

[0013] Preferably, the thicknesses of both the first rib part and the second rib part gradually increase from one end to the other end in the axial direction of the filter screen.

[0014] Compared with the prior art, the utility model has the following beneficial technical effects:

[0015] 1. The flowmeter joint and the filter screen are designed in a split type, which is convenient for replacing the filter screen and reduces the production cost;

[0016] 2. The flowmeter joint and the filter screen are in an overall clearance fit, which is convenient for assembly, and the local interference fit improves the anti-detachment effect;

[0017] 3. Through the buckle connection between the buckle part and the clamping groove, it can ensure that the whole structure meets the working state requirements and is not easy to fall off;

[0018] 4. The slide bar part can limit the anti-rotation of the filter screen;

[0019] 5. The filter screen has a trumpet-shaped air passage, which is convenient for air intake. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of an embodiment of the utility model;

[0021] Figure 2 is Figure 1 an exploded view of the structure of;

[0022] Figure 3 is a structural sectional view of an embodiment of the utility model;

[0023] Figure 4 is Figure 3 an enlarged view of the structure at A in;

[0024] Reference numerals: 1. Flowmeter joint; 11. Inner ring surface; 12. Fastening table part; 13. Clamping groove; 14. Step part; 15. Slide bar part; 16. Reinforcing rib part; 2. Filter screen; 21. Assembly surface; 22. Buckle part; 23. Rib plate part. Detailed Description of the Invention

[0025] Embodiment 1

[0026] As shown Figures 1-4 A fuel cell flowmeter joint and filter screen matching structure proposed in this embodiment includes a flowmeter joint 1 and a filter screen 2.

[0027] One end of the flowmeter joint 1 has an inner ring surface 11 and a step portion 14 at one end inside the inner ring surface 11, and a clamping groove 13 is provided on the inner ring surface 11.

[0028] The filter screen 2 includes a main body ring portion and a reticular rib plate portion 23 integrally connected to the inside of the main body ring portion. The main body ring portion passes through the inside of the inner ring surface 11 and its end abuts against the step portion 14. The main body ring portion is in clearance fit with the inner ring surface 11, and a buckle portion 22 that is stuck at the clamping groove 13 is provided on the outer peripheral surface of the main body ring portion. The outer peripheral surface of the main body ring portion has an assembly surface 21, and the assembly surface 21 is an inclined surface, which can improve the smoothness of installing the filter screen 2 inside the flowmeter joint 1.

[0029] The buckle portion 22 has a guiding inclined surface distributed on the front side in the assembly direction and a limiting plane distributed on the rear side in the assembly direction. The limiting plane is perpendicular to the outer peripheral surface of the main body ring portion. Then, the guiding inclined surface can assist in smoothly installing the filter screen 2 inside the flowmeter joint 1. When the filter screen 2 moves, the main body ring portion deforms inward. When the end of the main body ring portion of the filter screen 2 abuts against the step portion 14, the main body ring portion deforms reversely, so that the buckle portion 22 is buckled at the clamping groove 13, and the limiting plane can play a limiting role.

[0030] To further improve the reliability of the assembly of the flowmeter joint 1 and the filter screen 2, a fastening table portion 12 protruding inward is designed on the inner ring surface 11, and the fastening table portion 12 is in interference fit with the main body ring portion.

[0031] In addition, a sliding strip portion 15 is arranged on the inner ring surface 11 along the axial direction, and a sliding groove that is slidably connected to the sliding strip portion 15 is provided on the outer peripheral surface of the main body ring portion. Through the cooperation between the sliding strip portion 15 and the sliding groove, the filter screen 2 can be prevented from rotating during operation.

[0032] The diameter of the inner ring surface 11 gradually decreases from the outer end to the inner end along the axial direction, that is, it is in a flared shape, which is more convenient for installing the filter screen 2 inside the flowmeter joint 1.

[0033] To improve the reliability of the flowmeter joint 1 for buckling and limiting the inner filter screen 2, an annular reinforcing rib portion 16 is arranged on the outer peripheral surface of the flowmeter joint 1 to improve the structural strength and anti-deformation ability of the flowmeter joint 1.

[0034] In this embodiment, the flowmeter joint 1 and the filter screen 2 are designed in a split type and are connected by buckling, which is convenient for replacing the filter screen 2 and reduces the production cost. The flowmeter joint 1 and the filter screen 2 are in clearance fit as a whole, which is convenient for assembly, and are in interference fit locally to improve the anti-detachment effect. Through the buckling connection between the buckle portion 22 and the clamping groove 13, the entire structure can meet the working state requirements and is not easy to fall off. The sliding strip portion 15 can perform anti-rotation limiting on the filter screen 2.

[0035] Embodiment 2

[0036] As Figures 1-4 shown, a matching structure of a fuel cell flowmeter joint and a filter screen proposed in this embodiment, compared with Embodiment 1, in this embodiment, the rib plate portion 23 includes a plurality of first rib sheet portions distributed in parallel and a plurality of second rib sheet portions distributed in parallel. The first rib sheet portions and the second rib sheet portions are perpendicular, and an air passage distributed in a mesh shape is formed between the plurality of first rib sheet portions and the plurality of second rib sheet portions.

[0037] The thicknesses of the first rib sheet portion and the second rib sheet portion both gradually increase from one axial end of the filter screen 2 to the other end, so that the air passage is distributed in a flared shape, wider outside and narrower inside, which is beneficial to the external air entering the inner side of the flowmeter joint 1, so that the incoming air flow is more stable.

[0038] The above has described in detail the embodiments of the present utility model in conjunction with the accompanying drawings. However, the present utility model is not limited thereto. Various changes can be made without departing from the gist of the present utility model within the scope of knowledge possessed by those skilled in the art to which the present utility model pertains.

Claims

1. A combined structure of a fuel cell flowmeter joint and a filter screen, characterized in that Comprising: A flowmeter connector (1), one end of which has an inner ring surface (11) and a step portion (14) at one end inside the inner ring surface (11), and a clamping groove (13) is provided on the inner ring surface (11); A filter screen (2), which includes a main body ring portion and a reticular rib plate portion (23) integrally connected to the inside of the main body ring portion. The main body ring portion passes through the inside of the inner ring surface (11) and the end abuts against the step portion (14). A clamping portion (22) that is clamped at the clamping groove (13) is provided on the outer peripheral surface of the main body ring portion.

2. The mating structure of a fuel cell flowmeter joint and a filter screen according to claim 1, characterized in that The main body ring portion is in clearance fit with the inner ring surface (11), and a fastening table portion (12) that protrudes inward is provided on the inner ring surface (11), and the fastening table portion (12) is in interference fit with the main body ring portion.

3. The mating structure of a fuel cell flowmeter joint and a filter screen according to claim 1, wherein, A slide bar portion (15) is axially provided on the inner ring surface (11), and a sliding groove that is slidably connected to the slide bar portion (15) is provided on the outer peripheral surface of the main body ring portion.

4. A fuel cell flowmeter joint and filter screen matching structure according to claim 1, characterized in that The diameter of the inner ring surface (11) gradually decreases from the outer end to the inner end in the axial direction.

5. The mating structure of a fuel cell flowmeter joint and a filter screen according to claim 1, characterized in that An annular reinforcing rib portion (16) is provided on the outer peripheral surface of the flowmeter connector (1).

6. A fuel cell flowmeter joint and filter screen matching structure according to claim 1, characterized in that, The clamping portion (22) has a guiding inclined surface distributed on the front side in the assembly direction and a limiting plane distributed on the rear side in the assembly direction, and the limiting plane is perpendicular to the outer peripheral surface of the main body ring portion.

7. A fuel cell flowmeter joint and filter screen matching structure according to claim 1, characterized in that, The outer peripheral surface of the main body ring portion has an assembly surface (21), and the assembly surface (21) is an inclined surface.

8. A fuel cell flowmeter joint and filter screen matching structure according to claim 1, characterized in that, The rib plate portion (23) includes a plurality of first rib pieces distributed in parallel and a plurality of second rib pieces distributed in parallel, and the first rib pieces and the second rib pieces are perpendicular.

9. A fuel cell flowmeter joint and filter screen matching structure according to claim 8, characterized in that, The thicknesses of both the first rib pieces and the second rib pieces gradually increase from one end to the other end in the axial direction of the filter screen (2).

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