Quick sealing joint for solid oxide fuel cell power generation system

Abstract

The invention relates to a quick sealing joint for a solid oxide fuel cell power generation system. The quick sealing joint comprises a connecting assembly and a sealing assembly, the connecting assembly comprises a connecting pipe and a threaded gland, one end of the connecting pipe communicates with the power generation system, and the other end of the connecting pipe is detachably connected with the threaded gland. The sealing assembly comprises a supporting block, an elastic block and a pressing block. An elastic block is arranged between the supporting block and the pressing block, the supporting block and the elastic block are embedded into the connecting pipe, and the face, away from the elastic block, of the pressing block is attached to the threaded gland. And a plurality of through holes for thermocouples to pass through are formed in the circumferential directions of the supporting block, the elastic block and the pressing block. The supporting block is provided with a pressure guiding pipe used for installing a pressure sensor, and the pressure guiding pipe penetrates through the sealing assembly and the connecting assembly.

Description

Technical Field

[0001] The invention relates to the technical field of solid oxide fuel cells, and in particular to a quick sealing joint used in a solid oxide fuel cell power generation system. Background Art

[0002] The solid oxide fuel cell power generation system includes a medium pretreatment unit, a fuel cell stack unit, and a waste heat recovery unit. When the power generation system is running, the solid oxide fuel cell is used as an energy source, and the temperature and pressure changes inside it will affect the function of the entire power generation system. Conventional means require openings at multiple locations in the power generation system in order to monitor the temperature at various locations in the power generation system and the changes in pressure within the power generation system, and then connect multiple thermocouples or install pressure sensors at the openings in turn. Since the solid oxide fuel cell power generation system has high requirements for overall sealing, this method of opening holes in multiple locations is not conducive to the overall sealing of the power generation system, and the assembly is complicated and not conducive to assembly. Summary of the invention

[0003] The purpose of the present invention is to design a quick sealing joint for a solid oxide fuel cell power generation system to solve the above-mentioned problems.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A quick sealing joint for a solid oxide fuel cell power generation system includes a connecting assembly and a sealing assembly, and a sealing assembly is provided in the connecting assembly. The connecting assembly includes a connecting pipe and a threaded gland, one end of the connecting pipe is connected to the power generation system, and the other end is detachably connected to the threaded gland. The sealing assembly includes a support block, an elastic block and a clamping block; a plurality of through holes for thermocouples to pass through are provided on the circumference of the support block, the elastic block and the clamping block. A pressure lead pipe for installing a pressure sensor is provided on the support block, one end of the pressure lead pipe passes through the support block and is connected to the connecting pipe, and the other end passes through the elastic block, the clamping block and the threaded gland in sequence.

[0005] Furthermore, an elastic ring is provided between the connecting pipe and the threaded gland. The contact surfaces of the connecting pipe, the threaded gland and the elastic ring are all provided with a first chamfer, and both side end surfaces of the elastic ring are provided with a second chamfer matching the first chamfer.

[0006] Furthermore, a through pipe is provided at one end of the connecting pipe away from the threaded gland, and a threaded pipe is provided at the other end. The through pipe is communicated with the power generation system, and the threaded pipe is threadedly connected with the threaded gland.

[0007] Furthermore, a first clamping block and a second clamping block are respectively provided on the connecting pipe and the threaded gland, and both the first clamping block and the second clamping block are polygonal structures.

[0008] Furthermore, a step is provided on the inner wall of the connecting pipe, one side of the support block fits with the step, the other side of the support block fits with the elastic block, the other side of the elastic block fits with the clamping block, and one side of the clamping block fits with the threaded gland.

[0009] Furthermore, the inner wall of the connecting tube is provided with a plurality of convex strips on its circumference, and the sides of the supporting block and the elastic block are provided with a plurality of grooves matching the convex strips on their circumference. A positioning hole is provided on one side of the elastic block close to the clamping block, and a positioning block is provided at the position of the clamping block corresponding to the positioning hole.

[0010] Furthermore, the inner wall of the connecting pipe is provided with a first slope surface, and the elastic block is provided with a second slope surface matching the first slope surface.

[0011] Compared with the prior art, the present invention has the following beneficial effects: multiple thermocouples pass through the same sealing assembly and enter different positions inside the solid oxide fuel cell power generation system, without the need to make multiple holes in the power generation system, thereby ensuring the overall sealing of the power generation system, simplifying the overall structure, and facilitating assembly. By tightening the threaded gland, the compression block squeezes the elastic block to deform, so that the thermocouple, the pressure lead pipe and the inner wall of the through hole fit tightly, improving the sealing performance of the sealing assembly. A pressure sensor is installed on the pressure lead pipe without the need to make additional holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the present invention as a whole;

[0013] Figure 2 is a cross-sectional view of the present invention as a whole;

[0014] Figure 3 It is an exploded view of the present invention as a whole;

[0015] Figure 4 is an exploded cross-sectional schematic diagram of the connection assembly of the present invention;

[0016] Figure 5 is an exploded view of the sealing assembly of the present invention.

[0017] Legend: 1. Connecting assembly; 2. Sealing assembly; 11. Connecting pipe; 12. Threaded gland; 13. Elastic ring; 111. Through pipe; 112. Threaded pipe; 113. First clamping block; 114. Step; 115. First slope; 116. Raised strip; 117. First chamfer; 121. Second clamping block; 122. Through opening; 131. Second chamfer; 21. Support block; 22. Elastic block; 23. Pressing block; 24. Groove; 25. Through hole; 211. Pressure pipe; 221. Positioning hole; 222. Second slope; 231. Positioning block. DETAILED DESCRIPTION

[0018] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0019] See also Figure 1-5 As shown in , a quick sealing joint for a solid oxide fuel cell power generation system includes a connecting component 1 and a sealing component 2, and the sealing component 2 is arranged in the connecting component 1.

[0020] The connection assembly 1 includes a connection pipe 11 and a threaded gland 12, one end of the connection pipe 11 is connected to the power generation system, and the other end is detachably connected to the threaded gland 12. A through pipe 111 is provided at one end of the connection pipe 11 away from the threaded gland 12, and a threaded pipe 112 is provided at the other end. The through pipe 111 is connected to the power generation system, and the threaded pipe 112 is threadedly connected to the threaded gland 12. An elastic ring 13 is provided between the connection pipe 11 and the threaded gland 12. The contact surfaces of the connection pipe 11 and the threaded gland 12 and the elastic ring 13 are all provided with a first chamfer 117, and the end surfaces on both sides of the elastic ring 13 are all provided with a second chamfer 131 that matches the first chamfer 117. When the threaded gland 12 is screwed into the threaded pipe 112, pressure is applied to the two end surfaces of the elastic ring 13. Under the cooperation of the first chamfer 117 and the second chamfer 131, the elastic ring 13 undergoes axial and radial deformation. The elastic force generated by the axial deformation of the elastic ring 13 causes the threaded gland 12 to be subjected to an axial thrust, thereby enhancing the stability of the threaded connection between the threaded gland 12 and the threaded pipe 112 and preventing the threaded gland 12 from loosening. The elastic force generated by the radial deformation of the elastic ring 13 makes the two sides of the elastic ring 13 fit tightly with the connecting pipe 11 and the threaded gland 12, respectively, thereby improving the sealing of the connection between the connecting pipe 11 and the threaded gland 12. The connecting pipe 11 and the threaded gland 12 are respectively provided with a first clamping block 113 and a second clamping block 121, and both the first clamping block 113 and the second clamping block 121 are polygonal structures. The first clamping block 113 and the second clamping block 121 are clamped manually or with tools to operate the connecting pipe 11 and the threaded gland 12 to rotate relative to each other, so as to facilitate the installation and disassembly of the connecting pipe 11 and the threaded gland 12.

[0021] The sealing assembly 2 includes a support block 21, an elastic block 22 and a clamping block 23. An elastic block 22 is provided between the support block 21 and the clamping block 23, the support block 21 and the elastic block 22 are embedded in the connecting tube 11, and the side of the clamping block 23 away from the elastic block 22 is in contact with the threaded gland 12. A step 114 is provided on the inner wall of the connecting tube 11, one side of the support block 21 is in contact with the step 114, the other side of the support block 21 is in contact with the elastic block 22, the other side of the elastic block 22 is in contact with the clamping block 23, and one side of the clamping block 23 is in contact with the threaded gland 12. A through opening 122 is provided on the end face of the threaded end cap, the pressure-inducing tube 211 passes through the through opening 122, and the thermocouple passes through the through opening 122 to enter the sealing assembly 2.

[0022] When the threaded gland 12 is screwed into the threaded tube 112, the clamping block 23 is driven to apply pressure to the elastic block 22. A plurality of through holes 25 for the thermocouple to pass through are provided on the circumference of the support block 21, the elastic block 22 and the clamping block 23. A pressure lead pipe 211 for installing a pressure sensor is provided on the support block 21, and the pressure lead pipe 211 passes through the sealing component 2 and the connecting component 1. A pressure sensor can be installed on one end of the pressure lead pipe 211, and the other end is connected to the inside of the solid oxide fuel cell power generation system. When the clamping block 23 applies pressure to the elastic block 22, the elastic block 22 is deformed, and the thermocouple and the pressure lead pipe 211 are tightly fitted with the inner wall of the through hole 25, thereby improving the sealing of the elastic block 22. The inner wall of the connecting tube 11 is provided with a first slope 115, and the elastic block 22 is provided with a second slope 222 that matches the first slope 115. The cooperation of the first slope 115 and the second slope 222 increases the contact area between the elastic block 22 and the connecting tube 11, and optimizes the sealing performance between the elastic block 22 and the connecting tube 11. When the pressing block 23 applies axial pressure to the elastic block 22, the cooperation of the first slope 115 and the second slope 222 causes the elastic block 22 to generate radial elastic force on the thermocouple and the pressure-inducing tube 211, and improves the sealing performance of the assembly of the elastic block 22, the thermocouple and the pressure-inducing tube 211.

[0023] A plurality of ridges 116 are provided on the circumference of the inner wall of the connecting tube 11, and a plurality of grooves 24 are provided on the circumference of the side surfaces of the supporting block 21 and the elastic block 22 to match the ridges 116. A positioning hole 221 is provided on one side of the elastic block 22 close to the clamping block 23, and a positioning block 231 is provided at the position of the clamping block 23 corresponding to the positioning hole 221. The cooperation between the ridges 116 and the grooves 24 enables the supporting block 21 and the elastic block 22 to remain relatively stationary with the connecting tube 11 in the circumferential direction, and the clamping block 23 is quickly assembled to the elastic block 22 through the cooperation between the positioning holes 221 and the positioning holes 221, and remains relatively stationary with the supporting block 21 and the elastic block 22 in the circumferential direction. This prevents the inconsistent circumferential rotation angles of the components of the sealing assembly 2 from causing shear damage to the thermocouple during the rotation of the threaded gland 12.

[0024] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A quick sealing joint for a solid oxide fuel cell power generation system, characterized in that: The invention comprises a connecting component (1) and a sealing component (2), wherein the sealing component (2) is arranged in the connecting component (1); the connecting component (1) comprises a connecting pipe (11) and a threaded gland (12), wherein one end of the connecting pipe (11) is connected to a power generation system, and the other end is detachably connected to the threaded gland (12); the sealing component (2) comprises a supporting block (21), an elastic block (22) and a clamping block (23); a plurality of through holes (25) for thermocouples to pass through are arranged on the circumference of the supporting block (21), the elastic block (22) and the clamping block (23); a pressure lead pipe (211) for installing a pressure sensor is arranged on the supporting block (21), wherein one end of the pressure lead pipe (211) passes through the supporting block (21) and is connected to the connecting pipe (11), and the other end passes through the elastic block (22), the clamping block (23) and the threaded gland (12) in sequence.

2. The quick sealing joint for a solid oxide fuel cell power generation system according to claim 1, characterized in that: An elastic ring (13) is provided between the connecting tube (11) and the threaded gland (12); the contact surfaces of the connecting tube (11) and the threaded gland (12) and the elastic ring (13) are all provided with a first chamfer (117), and both side end surfaces of the elastic ring (13) are provided with a second chamfer (131) matching the first chamfer (117).

3. The quick sealing joint for a solid oxide fuel cell power generation system according to claim 1, characterized in that: A through pipe (111) is provided at one end of the connecting pipe (11) away from the threaded gland (12), and a threaded pipe (112) is provided at the other end; the through pipe (111) is in communication with the power generation system, and the threaded pipe (112) is threadedly connected to the threaded gland (12).

4. The quick sealing joint for a solid oxide fuel cell power generation system according to claim 1, characterized in that: The connecting pipe (11) and the threaded gland (12) are respectively provided with a first clamping block (113) and a second clamping block (121); the first clamping block (113) and the second clamping block (121) are both polygonal structures.

5. The quick sealing joint for a solid oxide fuel cell power generation system according to claim 1, characterized in that: A step (114) is provided on the inner wall of the connecting pipe (11), one side of the supporting block (21) is in contact with the step (114), the other side of the supporting block (21) is in contact with the elastic block (22), the other side of the elastic block (22) is in contact with the clamping block (23), and one side of the clamping block (23) is in contact with the threaded gland (12).

6. The quick sealing joint for a solid oxide fuel cell power generation system according to claim 1, characterized in that: A plurality of convex strips (116) are provided on the circumference of the inner wall of the connecting tube (11), and a plurality of grooves (24) matching the convex strips (116) are provided on the circumference of the side surfaces of the supporting block (21) and the elastic block (22); a positioning hole (221) is provided on one side of the elastic block (22) close to the clamping block (23), and a positioning block (231) is provided on the clamping block (23) at a position corresponding to the positioning hole (221).

7. The quick sealing joint for a solid oxide fuel cell power generation system according to claim 1, characterized in that: The inner wall of the connecting pipe (11) is provided with a first slope surface (115), and the elastic block (22) is provided with a second slope surface (222) matching the first slope surface (115).

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