CN219102360U - Flow limiting structure and fuel cell cooling system - Google Patents

Abstract

The utility model discloses a flow limiting structure and a fuel cell cooling system, wherein the flow limiting structure comprises a pipe body, two ends of the pipe body are respectively communicated with an input hole and an output hole in the pipe body, the pipe diameter of the pipe body is a, the pipe diameter of the input hole is b, the pipe diameter of the output hole is c, a is larger than b, a is larger than c, two flanges are arranged on the pipe body and encircle the outer wall of the pipe body, and the two flanges are respectively arranged at the two ends of the pipe body. The utility model can realize the current limiting of the exhaust pipe of the electric pile.

Description

Flow limiting structure and fuel cell cooling system

Technical Field

The utility model relates to the field of fuel cells, in particular to a current limiting structure and a fuel cell cooling system.

Background

In the cooling system of the fuel cell, the cooling water flowing out of the stack contains air, the cooling water containing the air is discharged into the expansion tank through the exhaust pipe, and then the air in the cooling water is discharged to the atmosphere. However, if the exhaust pipe contains air in the coolant in the exhaust pipe, the coolant may overflow if the flow rate or the flow velocity of the coolant is too large. There are two current limiting modes commonly adopted at present, one of which is to connect a pipe with a smaller pipe diameter to an exhaust pipe between an expansion tank and a galvanic pile, but a pipe with a smaller pipe diameter is specially processed, so that the internal and external processing of solid round steel is required, and the processing cost is relatively high. Another way is to use a manual valve, such as a ball valve, to manually limit the flow rate of the valve, but the valve is not easy to manually adjust to a proper opening, and if the manual valve is touched slightly carelessly after the adjustment is successful, the opening of the manual valve needs to be readjusted.

Disclosure of Invention

The utility model aims to solve the technical problems that: solves at least one technical problem of providing a device which can be convenient to

The utility model solves the technical problems as follows:

the utility model provides a current limiting structure, includes the body, the both ends of body communicate respectively to the input hole and the output hole in the body, the pipe diameter of body is a, the pipe diameter of input hole is b, the pipe diameter of output hole is c, a is greater than b, a is greater than c, be equipped with two flanges on the body, two the flange encircles the body outer wall, two the flange sets up respectively the both ends of body.

As a further improvement of the technical scheme, the flow limiting structure further comprises an input baffle plate, wherein the input baffle plate is fixed at the input end of the pipe body, the input baffle plate covers the input end of the pipe body, and the input baffle plate is provided with an input hole communicated with the pipe body.

As a further improvement of the technical scheme, the flow limiting structure further comprises an output baffle plate, wherein the output baffle plate is fixed at the output end of the pipe body, the output baffle plate covers the output end of the pipe body, and the output baffle plate is provided with an output hole communicated with the pipe body.

As a further improvement of the technical scheme, the inner wall of the pipe body is provided with the concave parts, the concave parts encircle the inner wall of the pipe body, the concave parts are arranged in two, the concave parts are opposite to the flanges, and the concave parts are arranged in one-to-one correspondence with the flanges.

As a further improvement of the technical scheme, the concave is arranged in smooth transition with the inner wall of the pipe body.

As a further improvement of the above technical solution, b is greater than or equal to 1 mm and b is less than or equal to 2 mm.

As a further improvement of the above technical solution, c is greater than or equal to 1 mm and c is less than or equal to 2 mm.

As a further improvement of the above technical solution, c is greater than or equal to 6 mm and c is less than or equal to 10 mm.

The utility model also provides a fuel cell cooling system which comprises the flow limiting structure in any technical scheme.

The beneficial effects of the utility model are as follows: when the flow limiting structure is used for being installed in a pipeline arranged outside, the sealing performance between the pipeline body and the outside is effectively improved through the arrangement of the flange, the phenomenon that the flow of fluid in the pipeline passes through the outer side of the pipeline body and cannot play a role in limiting flow is avoided, through the arrangement of the structure, the fluid in the pipeline can only enter the pipeline body from the input hole and then flow out of the output hole of the pipeline body, in addition, a is larger than b, a is larger than c, the fluid in the pipeline can effectively limit flow when entering the pipeline, after entering the pipeline body, the pipe diameter is larger relative to the input hole, so that the flow speed of the fluid in the pipeline body is slower, the pipe diameter of the output hole is smaller relative to the pipe diameter of the pipeline body, and the flow limiting effect can be played.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is evident that the drawings described are only some embodiments of the utility model, but not all embodiments, and that other designs and drawings can be obtained from these drawings by a person skilled in the art without inventive effort.

Fig. 1 is a schematic structural view of a flow restricting structure of the present utility model.

In the accompanying drawings: 1-pipe body, 2-input hole, 3-output hole, 4-input baffle, 5-output baffle, 6-flange, 7-concave.

Detailed Description

The conception, specific structure, and technical effects produced by the present utility model will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, features, and effects of the present utility model. It is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present utility model based on the embodiments of the present utility model. In addition, all coupling/connection relationships mentioned herein do not refer to direct connection of the components, but rather, refer to the fact that a more optimal coupling structure may be formed by adding or subtracting coupling aids depending on the particular implementation. The technical features in the utility model can be interactively combined on the premise of no contradiction and conflict.

Referring to fig. 1, a current limiting structure comprises a pipe body 1, two ends of the pipe body 1 are respectively communicated with an input hole 2 and an output hole 3 in the pipe body 1, the pipe diameter of the pipe body 1 is a, the pipe diameter of the input hole 2 is b, the pipe diameter of the output hole 3 is c, a is greater than b, a is greater than c, two flanges 6 are arranged on the pipe body 1, two flanges 6 encircle the outer wall of the pipe body 1, and two flanges 6 are respectively arranged at two ends of the pipe body 1.

When the flow limiting structure is used, the sealing performance between the pipe body 1 and the external device is effectively improved through the arrangement of the flange 6, the phenomenon that the flow of fluid in the pipe body 1 from the outer side of the pipe body 1 cannot play a role in limiting flow is avoided, through the arrangement of the structure, the fluid in the pipe body can only enter the pipe body 1 from the input hole 2 and then flow out from the output hole 3 of the pipe body 1, in addition, a is larger than b, a is larger than c, the fluid in the pipe body can effectively limit flow when entering the pipe body 1, after entering the pipe body 1, the pipe diameter is larger relative to the input hole 2, the flow speed of the fluid in the pipe body 1 is slower, and the pipe diameter of the output hole 3 is smaller relative to the pipe diameter of the pipe body 1, so that the flow limiting effect can be achieved.

Preferably, the flange 6 and the outer wall of the pipe body 1 are in smooth transition, so that the installation and fitting effect between the flange 6 and the pipe is better.

In some embodiments, the flow limiting structure further includes an input baffle 4, where the input baffle 4 is fixed at the input end of the pipe body 1, the input baffle 4 covers the input end of the pipe body 1, and the input baffle 4 is provided with the input hole 2 that communicates with the pipe body 1. The input baffle 4 is used for blocking the fluid flowing into the pipe body 1 so as to achieve the effect of limiting the flow, and the fluid in the pipeline is forced to enter the pipe body 1 only from the input hole 2.

In some embodiments, the flow limiting structure further includes an output baffle 5, where the output baffle 5 is fixed at the output end of the pipe body 1, the output baffle 5 covers the output end of the pipe body 1, and the output baffle 5 is provided with the output hole 3 that communicates with the pipe body 1. The output baffle 5 covers the output end of the pipe body 1 to perform flow restriction on the fluid flowing out of the pipe body 1.

In actual use, output baffle 5 and input baffle 4 weld respectively at the both ends of body 1, adopt full weld between input baffle 4 and the body 1, adopt full weld between output baffle 5 and the body 1, in addition, polish between input baffle 4 and the body 1 and level, polish between output baffle 5 and the body 1 and level.

In some embodiments, the inner wall of the pipe body 1 is provided with recesses 7, the recesses 7 encircle the inner wall of the pipe body 1, two recesses 7 are arranged, the recesses 7 are opposite to the flanges 6, and the recesses 7 are arranged in one-to-one correspondence with the flanges 6. This simple structure, convenience, through this sunken 7's setting, the flange 6 and the sunken 7 of body 1 can be formed by body 1 deformation, and its production is convenient. In addition, the setting of sunken 7 for the internal diameter of sunken 7 department body 1 is bigger, and when body 1 was placed for the level, sunken 7 departments can play certain separation effect to the coolant liquid that mixes in body 1 gas and the liquid mixture, make the coolant liquid be full of earlier sunken then the motion, make the gas pass through the body more fast, reduce the throughput of liquid. In practical use, the embodiment is used for being installed on the exhaust pipe of the heat exchanger in the fuel cell cooling system, and can effectively reduce the loss of cooling liquid in the heat exchanger.

In some embodiments, the recess and the inner wall of the tube body 1 are arranged in a smooth transition.

In some embodiments, b is greater than or equal to 1 millimeter and b is less than or equal to 2 millimeters. The structure is simple and the setting is convenient.

In some embodiments, c is greater than or equal to 1 millimeter and c is less than or equal to 2 millimeters. The structure is simple and the setting is convenient.

In some embodiments, c is greater than or equal to 6 millimeters and c is less than or equal to 10 millimeters. Preferably, c is 6 mm. The structure is simple and the setting is convenient. Alternatively, the flange 6 has an outer diameter of 10 mm, the recess 7 has an inner diameter of 8 mm, the recess 7 has a length of 5 mm, and the tube 1 has an outer diameter of 8 mm. The distance from the recess 7 near the output baffle 5 to the end face of the pipe body 1 to which the output baffle 5 is attached is 4 mm, and accordingly, the two recesses 7 are mirror images of each other.

The utility model also provides a fuel cell cooling system comprising the flow restricting structure in any of the above embodiments. Since the above has been described with respect to the flow restricting structure, those skilled in the art will understand in conjunction with the drawings of the specification, the description of the flow restricting structure is not repeated herein. The fuel cell cooling system includes an exhaust duct in which the flow restricting structure is installed. Generally, the exhaust pipeline has the condition that the cooling liquid and the gas are mixed together, and the cooling liquid and the gas can be limited by the setting of the flow limiting structure, but the gas can pass through the flow limiting structure more quickly because the gas moves faster relative to the cooling liquid, so that the overflow of the cooling liquid can be reduced, and the gas can be discharged more quickly.

While the preferred embodiments of the present utility model have been illustrated and described, the present utility model is not limited to the embodiments, and various equivalent modifications and substitutions can be made by one skilled in the art without departing from the spirit of the present utility model, and these are intended to be included in the scope of the present utility model as defined in the appended claims.

Claims (9)

1. The utility model provides a current limiting structure, includes body (1), its characterized in that, both ends of body (1) are linked together input hole (2) and output hole (3) in body (1) respectively, the pipe diameter of body (1) is a, the pipe diameter of input hole (2) is b, the pipe diameter of output hole (3) is c, a is greater than b, a is greater than c, be equipped with two flanges (6) on body (1), two flange (6) encircle body (1) outer wall, two flange (6) set up respectively the both ends portion of body (1).

2. The flow limiting structure according to claim 1, further comprising an input baffle (4), wherein the input baffle (4) is fixed at an input end of the pipe body (1), the input baffle (4) covers the input end of the pipe body (1), and the input baffle (4) is provided with the input hole (2) communicated into the pipe body (1).

3. The flow limiting structure according to claim 1, further comprising an output baffle (5), wherein the output baffle (5) is fixed at an output end of the pipe body (1), the output baffle (5) covers the output end of the pipe body (1), and the output baffle (5) is provided with the output hole (3) communicated into the pipe body (1).

4. The flow limiting structure according to claim 1, wherein the inner wall of the pipe body (1) is provided with recesses (7), the recesses (7) encircle the inner wall of the pipe body (1), the recesses (7) are arranged in two, the recesses (7) are opposite to the flanges (6), and the recesses (7) are arranged in one-to-one correspondence with the flanges (6).

5. The flow limiting structure according to claim 4, characterized in that the recess is provided in a rounded transition with the inner wall of the tube body (1).

6. The flow restricting structure of claim 1, wherein b is greater than or equal to 1 mm and b is less than or equal to 2 mm.

7. The flow restricting structure of claim 1, wherein c is greater than or equal to 1 mm and c is less than or equal to 2 mm.

8. The flow restricting structure of claim 1, wherein c is greater than or equal to 6 millimeters and c is less than or equal to 10 millimeters.

9. A fuel cell cooling system comprising a flow restricting structure as claimed in any one of claims 1 to 8.

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