Connecting structure
By designing the structure of the support base and movable connector in the solid oxide battery system, the cracks and fractures of the connecting parts caused by high temperature thermal expansion are solved, and the reliability and life of the system are improved.
Patent Information
- Application Number
- CN202420350321.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-26
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-02-26
AI Technical Summary
The thermal expansion caused by high temperature in the solid oxide battery system causes cracks and fractures to occur at the connection between the pipe and the connecting parts, affecting the reliability and life of the system.
A connecting structure is designed, including a support base, a first connecting member, a second connecting member and a connecting member, through the movable connection of the connecting member to the support base, providing a release space to alleviate tension and stress generated by thermal expansion, and prevent cracks and breakages. .
It effectively prevents the failure of connecting components caused by high-temperature thermal expansion, and improves the reliability and life of the solid oxide battery system.
Smart Images
Figure CN222338407U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of solid oxide batteries, in particular to a connection structure. Background Art
[0002] A solid oxide battery system usually includes multiple components such as a module, a heat exchanger, a water evaporator, a base, a temperature-averaging diversion chamber, and an exhaust gas emission device. During operation, a solid oxide battery system usually requires more pipes to allow the gases involved in the electrochemical reaction to flow between the components. For example, the heat exchanger and the module are connected by pipes.
[0003] In the prior art, in order to ensure a high degree of integration during the assembly of a solid oxide battery system, the components are arranged compactly and their positions are relatively fixed, and there is a situation where one component is connected to multiple components. Figure 1 The first connecting component is connected to the second connecting component through a pipeline, and the first connecting component is directly or indirectly fixedly connected to the third connecting component. Due to the high temperature in the working environment, the pipeline and the second connecting component undergo thermal expansion, causing the first connecting component to be subjected to a pulling force from the pipeline direction. At the same time, the first connecting component will also generate thermal stress due to its own thermal expansion, as well as a pulling force from the third connecting component direction, resulting in cracks and fractures at the connection between the pipeline and the first connecting component, and cracks and fractures will also occur at the connection between the first connecting component and the third connecting component. Utility Model Content
[0004] The purpose of the utility model is to provide a connection structure to avoid cracks or breaks at the connection points of adjacent components in a solid oxide battery system, thereby improving the reliability and life of the solid oxide battery system.
[0005] In order to achieve the above-mentioned purpose, the utility model provides a connection structure, including: a support base, a first connecting component, a second connecting component, a connecting piece and a pipeline, the first connecting component is installed on the support base, the connecting piece is used to connect the first connecting component and the support base, one end of the connecting piece is fixedly connected to the support base, and the other end is movably connected to the first connecting component, or one end of the connecting piece is movably connected to the support base, and the other end is fixedly connected to the first connecting component; the second connecting component is arranged above the first connecting component, and the first connecting component and the second connecting component are connected through the pipeline.
[0006] Furthermore, a flange edge is provided at the bottom of the first connecting component, a through hole is provided on the flange edge, the upper end of the connecting member is passed through the through hole and fixed to the flange, and the supporting base is provided with limiting holes with the same number and corresponding positions as the connecting member, the lower end of the connecting member is passed through the limiting hole, and the connecting member can move in the limiting hole.
[0007] Furthermore, the limiting hole includes a strip hole, a round hole, and a square hole, preferably a strip hole. When the axis of the connecting member coincides with the midpoint of the strip hole, the farthest distance between the axis of the connecting member and the strip hole is L, and the closest distance between the axis of the connecting member and the strip hole is l, and the ratio range of L:l is 5-10.
[0008] Furthermore, the cross-sectional area of the limiting hole is S2, the cross-sectional area of the connecting piece is S1, and the ratio of S2:S1 ranges from 1.3 to 5.
[0009] Furthermore, the first connecting component includes a fuel cell stack, a heat exchanger, a water evaporator, a burner, and a high-temperature tube group.
[0010] Furthermore, at non-operating temperature, the maximum distance between the axis of the connecting member and the limiting hole is N, and the vertical distance between the first connecting member and the limiting hole is X, where N>X.
[0011] Furthermore, the length of the connecting piece is Y, and the ratio of Y:X is in the range of 3-15.
[0012] Furthermore, the support base includes a connecting seat, and the limiting hole is provided on the connecting seat.
[0013] Furthermore, the sum of the areas of the end faces on one side of each connecting seat in contact with the first connecting component is A, the area of the end face on one side of the first connecting component in contact with the connecting seat is B, and the ratio of B:A ranges from 3-20.
[0014] Furthermore, a third connecting component is fixedly connected to the bottom of the first connecting component.
[0015] Compared with the prior art, the connection structure of the embodiment of the utility model has the beneficial effect that when the pipeline and the second connection component undergo thermal expansion, the first connection component is subjected to a pulling force from the direction of the pipeline. Since the first connection component is movably connected to the support base through a connecting piece, a release space is provided for the first connection component to be subjected to the pulling force from the direction of the pipeline and the stress concentration caused by its own thermal expansion, thereby preventing the first connection component from failing due to high-temperature thermal expansion and improving the reliability and life of the fixed oxide battery system. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a connection structure in the prior art;
[0017] Figure 2 This is a schematic structural diagram of the connection structure of Example 1 of the utility model;
[0018] Figure 3 This is an exploded view of the parts of the connection structure of Example 1 of the utility model;
[0019] Figure 4 This is a reference diagram of the use state of the connection structure of Embodiment 1 of the utility model;
[0020] Figure 5 It is a schematic diagram of the assembly of the connecting member of the connecting structure of Example 2 of the utility model;
[0021] Figure 6 This is a schematic diagram of the structure of the connection structure of Embodiment 2 of the present utility model;
[0022] Figure 7 This is a front view of the connection structure of Example 2 of the utility model;
[0023] Figure 8 This is a schematic diagram of the installation of the connection structure of Example 2 of the utility model;
[0024] Fig. 9 This is a reference diagram of the connection structure of Example 2 of the utility model after the initial heating and cooling;
[0025] Fig.10 This is a reference diagram of the connection structure of Example 2 of the utility model after multiple heating and cooling;
[0026] Fig.11 It is a reference diagram of the position of the connecting member when the first connecting member of the connecting structure of Example 2 of the utility model is pulled up at non-working temperature.
[0027] In the figure, 1, support base; 11, connecting seat; 100, limiting hole; 2, first connecting component; 21, flange, 22, through hole; 3, second connecting component; 4, connecting piece; 5, pipeline; 6, third connecting component. DETAILED DESCRIPTION
[0028] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0029] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "inside", "outside", etc. used in the present invention to indicate the orientation or positional relationship are based on the positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred devices and elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0030] In the description of the present invention, it should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.
[0031] See also Figure 1 In the existing solid oxide battery system, the first connecting component 2 is connected to the second connecting component 3 through the pipe 5, and the first connecting component 2 is directly fixedly connected to the third connecting component 6. The third connecting component 6 is generally fixed and can be used as a supporting base. Due to the high temperature in the working environment, the pipe 5 and the second connecting component 3 undergo thermal expansion, causing the first connecting component 2 to be subjected to a tensile force from the direction of the pipe 5. At the same time, the first connecting component 2 will also generate thermal stress due to its own thermal expansion, as well as a tensile force from the direction of the third connecting component 6, resulting in cracks and fractures at the connection between the pipe 5 and the first connecting component 2, and cracks and fractures will also occur at the connection between the first connecting component 2 and the third connecting component 6. Therefore, the utility model provides a connection structure for solving the above problems, which is described in detail below in conjunction with specific embodiments.
[0032] Example 1
[0033] See also Figures 2 to 4, a connection structure of a preferred embodiment of the utility model, flexibly connects the first connection part 2 with the support base 1, and provides a release space for the first connection part 2 to be subjected to the tension from the direction of the pipeline 5 and the stress concentration caused by its own thermal expansion. It specifically includes a support base 1, a first connection part 2, a second connection part 3, a connection member 4 and a pipeline 5, wherein the first connection part 2 is installed on the support base 1, and the connection member 4 is used to flexibly connect the first connection part 2 and the support base 1. It can have two connection forms. The first connection form is: one end of the connection member 4 is fixedly connected to the support base 1, and the other end is flexibly connected to the first connection part 2. The second connection form is: one end of the connection member 4 is flexibly connected to the support base 1, and the other end is fixedly connected to the first connection part 2. In this embodiment, for the convenience of explanation, the second connection form is adopted, the second connection form is arranged above the first connection part 2, and the first connection part 2 and the second connection part 3 are connected through a pipeline 5 for gas circulation. Specifically, the first connection part includes a stack, a heat exchanger, a water evaporator, a burner, and a high-temperature tube group.
[0034] See also Figure 2 , Figure 3 In order to simplify the structure of the connecting member 4, in this embodiment, the connecting member 4 is a positioning pin. In order to facilitate the fixed connection between the first connecting member 2 and the positioning pin, a flange 21 is provided at the bottom of the first connecting member 2, and a through hole 22 is provided on the flange 21. The upper end of the positioning pin is passed through the through hole 22 and fixed to the flange 21. The support base 1 is provided with limiting holes 100 with the same number and corresponding positions as the positioning pins. The lower end of the positioning pin is passed through the limiting hole 100, and the positioning pin can move in the limiting hole 100. Figure 3 In order to obtain better positioning accuracy, the spacing between the positioning pins needs to be set farther, and the midpoint of the through hole is set close to the edge side wall of the flange edge. In this embodiment, the midpoint of the limiting hole 100 is located on the axis of the through hole 21. Similarly, the limiting hole 100 is located below the flange edge 21, and the midpoint of the limiting hole 100 is set close to the edge side wall of the flange edge 21. In order to facilitate the fixing of the positioning pin and the flange edge 21, the positioning pin and the flange edge 21 can be fixed by welding. In some embodiments, the positioning pin can be integrally formed with the first connecting component 2.
[0035] Furthermore, in order to facilitate the first connecting component 2 to release the tension from the direction of the pipe 5 and the stress concentration caused by its own thermal expansion, the cross-sectional area of the limiting hole 100 is S2, the cross-sectional area of the connecting piece 4 is S1, and the ratio of S2:S1 is in the range of 1.3-5. If S2:S1 is less than 1.3, the gap between the limiting hole 100 and the connecting piece 4 is too small, that is, the moving space of the connecting piece 4 in the limiting hole 100 is too small, and the tension and stress concentration cannot be completely released, which will still cause the connection between the first connecting component 2 and the support base 1 to fail. If S2:S1 is greater than 5, the connection between the first connecting component 2 and the support base 1 will not be tight enough, which will still cause the connection between the first connecting component 2 and the support base 1 to fail.
[0036] Embodiment 2, as Figures 6 to 10 As shown, this embodiment is a further improvement based on Embodiment 1, and its details are as follows:
[0037] In Example 1, when the positioning pin and the first connecting member 2 are integrally formed or welded, the first connecting member 2 undergoes thermal expansion at high temperature, and the positioning pin may bear the stress generated by the thermal expansion of the first connecting member 2. At this time, the positioning pin is prone to deformation or fracture failure. To avoid this situation, in this embodiment, the connecting member 4 is a bolt, which passes through the through hole 22 and is fixed by a nut and a flange 21. The lower end of the bolt is inserted into the limiting hole 100, and the bolt can move in the limiting hole 100. The tightening degree of the bolt, nut and flange 21 can be appropriately adjusted to reduce the influence of the thermal expansion of the first connecting member 2 on the connecting member 4.
[0038] In some embodiments, the limiting hole 100 only needs to have a gap with the connecting member 4, so the limiting hole 100 can be a square hole, a round hole, a strip hole, etc. Further, since the square hole provided on the support base 1 may reduce the overall strength of the support base 1, and the round hole cannot limit the moving direction of the connecting member 4 in the limiting hole 100, in this embodiment, preferably, the limiting hole 100 is a strip hole.
[0039] Furthermore, in order to ensure a high degree of integration during the assembly of the solid oxide battery system, the various components are arranged compactly and their positions are relatively fixed. There is a situation where one component is connected to multiple components, so the connection points between different components may be subject to forces in multiple directions. When the second connecting component 3 undergoes thermal expansion, the first connecting component 2 will be subjected to a tensile force from the direction of the second connecting component 3. When the center of gravity of the first connecting component 2 and the center of gravity of the second connecting component 3 are not in the same vertical direction, the tensile force from the direction of the second connecting component 3 can be decomposed into a horizontal force and a vertical force. The connector 4 is passed through the limiting hole 100. One end of the connector 4 is fixedly connected to the second connecting component 3, and the other end is non-fixedly connected to the support base 1, which helps to release the vertical stress. The limiting hole 100 has a distal end that can provide a release space for the horizontal stress. See. Figure 7 , the axis of the connecting member 4 coincides with the midpoint of the limiting hole 100, the distance between the axis of the connecting member 4 and the far end of the strip hole is L, the distance between the axis of the connecting member 4 and the near end of the strip hole is l, and the ratio range of L:l is 5-10. If L:l is less than 5, the gap between the limiting hole 100 and the positioning pin is too small, that is, the moving space of the positioning pin in the limiting hole 100 is too small, and the stress cannot be completely released, which will still cause the connection between the first connecting member 2 and the support base 1 to fail. If L:l is greater than 10, the connection between the first connecting member 2 and the support base 1 will not be tight enough, which will still cause the connection between the first connecting member 2 and the support base 1 to fail.
[0040] Further, at non-operating temperature (non-operating condition after the solid oxide battery system has been started and stopped at least once), refer to Figure 4 , Fig. 9 , Fig.10 as well as Fig.11 At non-operating temperature, the first connecting part 2 will be pulled up by the second connecting part 3. At this time, the maximum distance between the axis of the connecting member 4 and the limiting hole 100 is N, and the vertical distance between the first connecting part 2 and the limiting hole 100 is X, which must satisfy N>X. At operating temperature, the first connecting part 2 and the second connecting part 3 will undergo a certain amount of thermal expansion. At this time, the bottom surface of the first connecting part 2 contacts the support base 1, and the support base 1 supports the first connecting part 2. Figure 5 If N is less than or equal to X, when thermal expansion occurs, the connector 4 is likely to collide with the side wall of the limiting hole 100, and the thermal expansion stress cannot be completely released through the limiting hole 100.
[0041] Furthermore, assuming that the length of the connector 4 is Y, the ratio of Y:X is in the range of 3-15. If Y:X is less than 3, the length of the connector 4 is too short, the first connector 2 will be pulled up by the second connector 3 at room temperature, and the connector 4 may be separated from the limiting hole 100, resulting in the unconstrained thermal expansion of the first connector 2 at high temperature, causing the pipe 5 at the connection between the first connector 2 and the second connector 3 to break. If Y:X is greater than 15, the positioning pin is too long, resulting in a waste of materials and easily affecting the assembly of other components.
[0042] Furthermore, in order to facilitate the setting of the limiting hole 100 and support the first connecting member 2, in some embodiments, refer to Figures 2 to 6 , the support base 1 is evenly distributed with connection seats 11, and the limiting holes 100 are opened on the connection seats 11. The sum of the areas of the end faces on one side of each connection seat 11 that contacts the first connection component 2 is A, and the area of the end faces on one side of the first connection component 2 that contacts the connection seat 11 is B, and the ratio of B:A ranges from 3 to 20. If B:A is less than 3, the total area A of the end faces of the connection seats 11 on the contact side is too large relative to the bottom area B of the first connection component 2, which affects the functional structural setting of the joint surface between the first connection component 2 and the connection seat 11. If B:A is greater than 20, the total area A of the end faces of the connection seats 11 on the contact side is too small relative to the bottom area B of the first connection component 2, and the support effect of the bracket on the first connection component 2 cannot be guaranteed, and the first connection component 2 is easily deformed due to uneven force. In addition, in some embodiments, a third connecting component 6 is fixed to the bottom of the first connecting component 2. When the support base 1 is not provided, the third connecting component 6 can play a supporting role. Due to the high temperature in the working environment, the pipe 5 and the second connecting component 3 undergo thermal expansion, causing the first connecting component 2 to be subjected to a pulling force from the direction of the pipe 5. At the same time, the first connecting component 2 will also generate thermal stress due to its own thermal expansion, as well as a pulling force from the direction of the third connecting component 6, causing the connection between the pipe 5 and the first connecting component 2 to be prone to cracks and fractures, and the connection between the first connecting component 2 and the third connecting component 6 will also be prone to cracks and fractures. However, in the present embodiment, since the support base 1 is provided, the third connecting component 6 is not required to play a supporting role, and the third connecting component 6 is fixedly connected to the first connecting component 2, and can be movably connected with the first connecting component 2 and the support base 1, so as to provide a stress release space for the first connecting component 2 under high temperature subjected to the tension from the direction of the pipeline 5, the tension from the direction of the third connecting component 6, and the stress concentration caused by thermal expansion, thereby reducing the risk of cracks or fractures at the connection parts between the first connecting component 2 and the pipeline 5 and the third connecting component 6, and improving the reliability and life of the fixed oxide battery system.
[0043] In summary, the embodiment of the utility model provides a connection structure. When the pipeline 5 and the second connection component 3 undergo thermal expansion, the first connection component 2 is subjected to a pulling force from the direction of the pipeline 5. Since the first connection component 2 is movably connected to the support base 1 through the connector 4, a release space is provided for the first connection component 2 to be subjected to the pulling force from the direction of the pipeline 5 and the stress concentration caused by its own thermal expansion, thereby preventing the first connection component 2 from failing due to high-temperature thermal expansion and improving the reliability and life of the fixed oxide battery system.
[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.
Claims
1. A connection structure, characterized in that: include: A support base, a first connecting component, a second connecting component, a connecting piece and a pipeline, wherein the first connecting component is installed on the support base, and the connecting piece is used to connect the first connecting component and the support base, one end of the connecting piece is fixedly connected to the support base, and the other end is movably connected to the first connecting component, or one end of the connecting piece is movably connected to the support base, and the other end is fixedly connected to the first connecting component; the second connecting component is arranged above the first connecting component, and the first connecting component and the second connecting component are connected through the pipeline.
2. The connection structure according to claim 1, characterized in that: A flange edge is provided at the bottom of the first connecting component, and a through hole is provided on the flange edge. One end of the connecting member is inserted into the through hole and fixed to the flange edge. The supporting base is provided with limiting holes with the same number and corresponding positions as the connecting members. The other end of the connecting member is inserted into the limiting hole, and the connecting member can move in the limiting hole.
3. The connection structure according to claim 2, characterized in that: The limiting holes include strip holes, round holes and square holes.
4. The connection structure according to claim 2, characterized in that: The cross-sectional area of the limiting hole is S2, the cross-sectional area of the connecting piece is S1, and the ratio of S2:S1 ranges from 1.3 to 5.
5. The connection structure according to claim 1, characterized in that: The first connecting components include a fuel cell stack, a heat exchanger, a water evaporator, a burner, and a high-temperature tube group.
6. The connection structure according to claim 2, characterized in that: At non-operating temperature, the maximum distance between the axis of the connecting member and the limiting hole is N, the vertical distance between the first connecting member and the limiting hole is X, and N>X.
7. The connection structure according to claim 6, characterized in that: The length of the connecting pieces is Y, and the ratio of Y:X is in the range of 3-15.
8. The connection structure according to claim 2, characterized in that: The support base includes a connecting seat, and the limiting hole is arranged on the connecting seat.
9. The connection structure according to claim 8, characterized in that: The sum of the areas of the end faces on one side of each connecting seat that contacts the first connecting component is A, the area of the end face on one side of the first connecting component that contacts the connecting seat is B, and the ratio of B:A ranges from 3 to 20.
10. The connection structure according to claim 1, characterized in that: A third connecting component is fixedly connected to the bottom of the first connecting component.