Gas outlet device of solid oxide fuel stack

Abstract

The utility model relates to the technical field of fuel cells, in particular to a gas outlet device of a solid oxide fuel stack, which comprises a mounting seat, a gas outlet pipe, an exhaust pipe and a sealing component, a connecting part integrally formed with the mounting seat is arranged on one side of the mounting seat, the gas outlet pipe is arranged in the mounting seat and extends towards the outer side of the mounting seat, and the sealing component is arranged on the gas outlet pipe. The exhaust pipe is arranged in the connecting part and extends towards the outer side of the connecting part, the exhaust pipe is communicated with the air outlet pipe through a cavity in the mounting seat, and the exhaust pipe is detachably connected with the connecting part through a sealing assembly. The utility model aims to solve the problems that the exhaust pipe of the solid oxide fuel stack is poor in sealing performance and inconvenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a gas outlet device for a solid oxide fuel cell stack. Background Art

[0002] Solid oxide fuel cell (SOFC) is a high-temperature electrochemical power generation device that uses solid oxide as an electrolyte to directly convert the chemical energy of fuel into electrical energy; solid oxide fuel cell stack refers to multiple SOFC units stacked to form an integral structure to increase output power and current density. With the development of SOFC technology, SOFC products are gradually evolving towards high power, high density, and multi-core group combinations; since solid oxide fuel cell stacks will produce high-temperature fuel exhaust during operation, the existing fuel exhaust gas exhaust pipe has poor sealing, which may cause fuel exhaust leakage, thereby affecting the performance and safety of solid oxide fuel cell stacks. Utility Model Content

[0003] The utility model aims to provide a solid oxide fuel cell stack gas outlet device, which is used to solve the problems of poor sealing performance and inconvenient disassembly and assembly of the solid oxide fuel cell stack exhaust pipe.

[0004] To achieve the above-mentioned purpose, the utility model provides a solid oxide fuel cell stack gas outlet device, including a mounting seat, an outlet pipe, an exhaust pipe and a sealing assembly, one side of the mounting seat is provided with a connecting portion integrally formed with the mounting seat, the outlet pipe is arranged in the mounting seat and extends to the outside of the mounting seat, the exhaust pipe is arranged in the connecting portion and extends to the outside of the connecting portion, the exhaust pipe is connected to the outlet pipe through a cavity in the mounting seat, and the exhaust pipe is detachably connected to the connecting portion through the sealing assembly.

[0005] Furthermore, the sealing assembly includes a sealing plug, which is sleeved on the exhaust pipe and sealedly connected to the cavity.

[0006] Furthermore, the sealing plug is made of high temperature resistant elastic material.

[0007] Furthermore, the sealing plug is conical in shape, embedded in the connecting portion, and a through hole matching the exhaust pipe is provided in the middle of the sealing plug.

[0008] Furthermore, one end of the exhaust pipe gradually narrows along the length direction of the exhaust pipe and is sealedly connected to the sealing plug.

[0009] Furthermore, the sealing assembly also includes a sealing cover, which is arranged on the outside of the sealing plug and is threadedly connected to the connecting part.

[0010] Furthermore, a thread matching the sealing cover is provided in the connecting portion, and the connecting portion and the sealing cover are threadedly connected.

[0011] Furthermore, a plurality of square grooves are provided on the outer side of the sealing cover.

[0012] Furthermore, a disc is provided at one end of the exhaust pipe away from the connecting portion, and the disc is sleeved on the exhaust pipe and is sealedly connected to the exhaust pipe.

[0013] The beneficial effects of the utility model include:

[0014] 1. The solid oxide fuel cell stack exhaust device provided by the utility model enhances the sealing between the exhaust pipe and the connection part by setting a sealing component, which can effectively prevent the leakage of fuel tail gas; at the same time, the detachable manner makes the assembly and disassembly between the exhaust pipe, the sealing component and the connection part more convenient, which is beneficial to the maintenance and replacement of the equipment, realizes a compact structural design, saves space and improves the stability of the overall device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments of the utility model will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the overall structure of a gas outlet device for a solid oxide fuel cell stack provided in an embodiment of the utility model;

[0017] Figure 2 A cross-sectional view of a gas outlet device for a solid oxide fuel cell stack provided in an embodiment of the utility model;

[0018] Icons: 1-mounting seat, 2-exhaust pipe, 3-exhaust pipe, 4-connecting part, 5-cavity, 6-sealing plug, 7-sealing cover, 8-disc. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. It should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0021] See also Figure 1 to Figure 2 As shown, the utility model provides a solid oxide fuel cell stack gas outlet device, including a mounting seat 1, an air outlet pipe 2, an exhaust pipe 3 and a sealing assembly, one side of the mounting seat 1 is provided with a connecting portion 4 integrally formed with the mounting seat 1, the air outlet pipe 2 is arranged in the mounting seat 1 and extends to the outside of the mounting seat 1, the exhaust pipe 3 is arranged in the connecting portion 4 and extends to the outside of the connecting portion 4, the exhaust pipe 3 is communicated with the air outlet pipe 2 through a cavity 5 in the mounting seat 1, and the exhaust pipe 3 is detachably connected to the connecting portion 4 through the sealing assembly; specifically, the exhaust pipe 3 is a straight-through pipe, and the exhaust pipe 3 can be inserted into the connecting portion 4 through the sealing assembly and communicated with the air outlet pipe 2 in the mounting seat 1; the mounting seat 1 serves as the solid oxide fuel cell stack gas outlet device The mounting seat 1 can be connected to an external mounting plate (not shown in the figure) to position the entire device; bolt holes are arranged around the mounting seat 1, and the mounting seat 1 can be fixedly connected to the external mounting plate through the bolt holes; the outlet pipe 2 and the mounting seat 1 are preferably fixedly connected by welding; the sealing component is embedded in the connecting portion 4, and the sealing performance between the exhaust pipe 3 and the connecting portion 4 is enhanced by setting the sealing component, and the sealing component, the exhaust pipe 3 and the connecting portion 4 can be quickly disassembled and assembled; in actual use, the exhaust pipe 3 is welded and sealed to the fuel exhaust grid plate of the solid oxide fuel cell stack, and the fuel exhaust gas discharged by the solid oxide fuel cell stack can enter the mounting seat 1 through the exhaust pipe 3 and then be discharged through the outlet pipe 2;

[0022] Preferably, the sealing assembly includes a sealing plug 6, which is sleeved on the exhaust pipe 3 and sealed with the cavity 5, and is made of a high-temperature resistant elastic material; the sealing plug 6 is conical, embedded in the connecting portion 4, and a through hole matching the exhaust pipe 3 is provided in the middle of the sealing plug 6; the sealing plug 6 is preferably made of silicone material and can withstand working conditions in a high-temperature environment; the conical sealing plug 6 can better adapt to the shape of the connecting portion 4 and improve the sealing effect; the through hole in the middle matches the exhaust pipe 3 to ensure smooth discharge of fuel exhaust gas;

[0023] Preferably, one end of the exhaust pipe 3 gradually narrows along the length direction of the exhaust pipe 3 and is sealed and connected to the sealing plug 6, and a disc 8 is provided at one end of the exhaust pipe 3 away from the connecting portion 4, and the disc 8 is sleeved on the exhaust pipe 3 and welded and sealed to the exhaust pipe 3; specifically, one end of the exhaust pipe 3 gradually narrows along the length direction of the exhaust pipe 3 so that the exhaust pipe 3 forms a certain taper, thereby facilitating a sealed connection with the sealing plug 6; the disc 8 is used to connect the fuel tail gas grid plate of the solid oxide fuel cell stack, and the disc 8 can be directly welded to the hydrogen outlet warehouse through hole;

[0024] Preferably, the sealing assembly also includes a sealing cover 7, which is arranged on the outer side of the sealing plug 6 and is threadedly connected to the connecting part 4, a thread matching the sealing cover 7 is provided inside the connecting part 4, the connecting part 4 and the sealing cover 7 are threadedly connected, and a plurality of square grooves are provided on the outer side of the sealing cover 7; by providing a plurality of square grooves, it is convenient to lock the sealing cover 7 using an external tool, and the external tool can be used to connect with the square grooves, and then the sealing cover 7 can be screwed into the connecting part 4, making installation and maintenance more convenient, and the design of the sealing cover 7 can effectively seal the connection between the sealing plug 6 and the connecting part 4, further improving the sealing performance of the device and ensuring the normal discharge of fuel exhaust.

[0025] In addition to the above description, there are a few points to note:

[0026] (1) The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure, and other structures may refer to the general design;

[0027] (2) In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0028] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A gas outlet device for a solid oxide fuel cell stack, characterized in that: The invention comprises a mounting seat (1), an air outlet pipe (2), an exhaust pipe (3) and a sealing assembly, wherein one side of the mounting seat (1) is provided with a connecting portion (4) integrally formed with the mounting seat (1), the air outlet pipe (2) is arranged in the mounting seat (1) and extends to the outside of the mounting seat (1), the exhaust pipe (3) is arranged in the connecting portion (4) and extends to the outside of the connecting portion (4), the exhaust pipe (3) is connected to the air outlet pipe (2) through a cavity (5) in the mounting seat (1), and the exhaust pipe (3) is detachably connected to the connecting portion (4) through the sealing assembly.

2. The gas outlet device for a solid oxide fuel cell stack according to claim 1, characterized in that: The sealing assembly comprises a sealing plug (6), which is sleeved on the exhaust pipe (3) and is sealedly connected to the cavity (5).

3. The gas outlet device of the solid oxide fuel cell stack according to claim 2, characterized in that: The sealing plug (6) is conical in shape and is embedded in the connecting portion (4). A through hole matching the exhaust pipe (3) is provided in the middle of the sealing plug (6).

4. The gas outlet device for a solid oxide fuel cell stack according to claim 3, characterized in that: The sealing plug (6) is made of high temperature resistant elastic material.

5. The gas outlet device for a solid oxide fuel cell stack according to claim 4, characterized in that: One end of the exhaust pipe (3) gradually narrows along the length direction of the exhaust pipe (3) and is sealedly connected to the sealing plug (6).

6. The gas outlet device for a solid oxide fuel cell stack according to claim 2, characterized in that: The sealing assembly further comprises a sealing cover (7), which is arranged on the outside of the sealing plug (6) and is threadedly connected to the connecting portion (4).

7. The gas outlet device for a solid oxide fuel cell stack according to claim 6, characterized in that: The connecting portion (4) is provided with a thread matching the sealing cover (7), and the connecting portion (4) and the sealing cover (7) are threadedly connected.

8. The gas outlet device for a solid oxide fuel cell stack according to claim 6, characterized in that: The outer side of the sealing cover (7) is provided with a plurality of square grooves.

9. The gas outlet device for a solid oxide fuel cell stack according to any one of claims 1 to 8, characterized in that: A disc (8) is provided at one end of the exhaust pipe (3) away from the connecting portion (4); the disc (8) is sleeved on the exhaust pipe (3) and is sealedly connected to the exhaust pipe (3).

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