Detachable nozzle for testing fuel cell injection type hydrogen circulation system

Abstract

The utility model discloses a detachable nozzle for testing an injection type hydrogen circulation system of a fuel cell. Comprising a diffuser head, a connecting pipe and a shell which are movably connected in sequence from left to right and are concentrically arranged, a lining with a cavity in the center is arranged in the shell in a sleeved mode, secondary flow inlets are formed in the upper side and the lower side of the cavity of the lining, a spray head is in threaded connection with the center of the lining, and a corrugated pipe is in threaded connection with the rear portion of the spray head. And one end of the corrugated pipe is connected with a steam-water mixing input pipe. According to the detachable spray head for testing the fuel cell injection type hydrogen circulation system, the technical problems that most of traditional ejector structures are fixed, and the integrated structure and the nozzle sectional area of the traditional ejector structures are determined at the beginning of design and cannot be adjusted are solved.

Description

Technical Field

[0001] This application relates to the field of nozzle technology, specifically a detachable nozzle for testing a fuel cell ejector-type hydrogen circulation system. Background Technology

[0002] Traditional ejector structures are mostly fixed, with their integrated structure and nozzle cross-sectional area determined at the initial design stage and not adjustable. This presents numerous problems in practical applications. For example, when operating conditions change, it is necessary to replace ejectors with different chamber sizes, nozzle dimensions, nozzle-to-mixing section distances, and throat combinations to match the conditions. Repeated disassembly of the ejector is not only time-consuming and labor-intensive, increasing costs, but also causes severe wear and tear, shortening its service life. Furthermore, when processes require multi-point vacuum or multi-component ejection, multiple jet pumps are needed, increasing space, energy consumption, and investment costs. For instance, in some industrial production processes, traditional ejectors cannot quickly adapt to changes in operating conditions, affecting production efficiency and cost control, thus hindering the widespread application and commercialization of ejectors in various scenarios.

[0003] Therefore, it is necessary to provide a detachable nozzle for testing fuel cell ejector hydrogen circulation systems to solve the above problems. Summary of the Invention

[0004] In view of the above-mentioned problems in the prior art, the purpose of this application is to provide a detachable nozzle for testing a fuel cell ejector hydrogen circulation system, so as to solve the problems mentioned in the background art.

[0005] The technical solution adopted by this application to solve its technical problem is: a detachable nozzle for testing a fuel cell ejector-type hydrogen circulation system, comprising a diffuser, a connecting pipe and a shell arranged concentrically and movably connected from left to right, wherein the shell is fitted with an inner liner with a central cavity, and secondary flow inlets are provided on the upper and lower sides of the cavity of the inner liner, the nozzle is threadedly connected to the center of the inner liner, and a bellows is threadedly connected to the rear of the nozzle, and one end of the bellows is connected to a gas-water mixing input pipe.

[0006] Furthermore, the left end of the diffuser head is the outlet section, and the right end is the diffuser head connecting section. The cross-sectional area of ​​the outlet section gradually decreases from left to right, and the rightmost end is connected to the diffuser head connecting section.

[0007] Furthermore, a diffuser head connecting protrusion extends upward on the outer peripheral wall of the diffuser head connecting section.

[0008] Furthermore, the leftmost end of the outer casing has an outer casing connecting section, and an outer casing connecting section protrusion extends upward on the outer peripheral wall of the outer casing connecting section.

[0009] Furthermore, the inner peripheral wall of the connecting pipe matches the outer peripheral wall of the diffuser head connecting section and the outer peripheral wall of the outer shell connecting section. Two grooves are formed on the inner peripheral wall of the connecting pipe, and the grooves are respectively connected to the diffuser head connecting protrusion and the outer shell connecting section protrusion.

[0010] Furthermore, sealing rings are fitted at both ends of the connecting pipe, one of which abuts against the diffuser head and the other sealing ring abuts against the outer shell.

[0011] Furthermore, the secondary flow inlets are an upper secondary flow inlet located above and a lower secondary flow inlet located below, and the leftmost ends of the upper and lower secondary flow inlets are connected to the outer shell connecting section.

[0012] Furthermore, an inner separation interface is provided on the bottom wall of the lower secondary flow inlet, and an outer separation interface is provided on the bottom wall of the outer shell. When the inner liner is fitted inside the outer shell, the inner separation interface and the outer separation interface are connected.

[0013] Furthermore, the outer peripheral wall of the rightmost end of the nozzle is provided with a threaded part that is threaded to the inner liner, and the leftmost end is the nozzle, with a top cover fitted on the outer peripheral wall of the leftmost end of the nozzle.

[0014] Furthermore, an extension sleeve is connected to the outer peripheral wall at the far right end of the housing.

[0015] The beneficial effects of this application are: the detachable nozzle for testing a fuel cell ejector hydrogen circulation system provided by this application, by providing a diffuser head, connecting pipe and shell with movable connection, makes the disassembly and installation of the entire device more convenient;

[0016] Furthermore, by setting a nozzle with a threaded part, the nozzle can be threadedly connected to the inner lining, and the distance between the nozzle and the connecting pipe can also be adjusted, thus improving the efficiency of the assembly.

[0017] By incorporating a corrugated pipe, the length of the pipe can be adjusted when it is filled with air pressure, thus adapting to various working conditions.

[0018] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0020] In the attached diagram:

[0021] Figure 1 This is an overall schematic diagram of this application;

[0022] Figure 2 This is a schematic diagram of the diffuser head in this application;

[0023] Figure 3 This is a schematic diagram of the casing of this application;

[0024] Figure 4 This is a schematic diagram of the connecting pipe in this application;

[0025] Figure 5 This is a schematic cross-sectional view of the main body of this application;

[0026] Figure 6 This is a schematic diagram of the medium flow direction in this application;

[0027] The following are the labeling elements in the figure:

[0028] 1. Diffuser head; 11. Outlet section; 12. Diffuser head connecting section; 121. Diffuser head connecting protrusion; 2. Connecting pipe; 21. Groove; 3. Outer shell; 31. Outer shell connecting section; 311. Outer shell connecting section protrusion; 32. External separation interface; 4. Extension sleeve; 5. Bellows; 6. Liner; 61. Upper secondary flow inlet; 62. Lower secondary flow inlet; 621. Internal separation interface; 7. Nozzle; 71. Threaded part; 72. Nozzle; 8. Top cover; 9. Sealing ring. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0031] like Figure 1-6 As shown, this application provides a technical solution: a detachable nozzle for testing a fuel cell ejector-type hydrogen circulation system, comprising a diffuser head 1, a connecting pipe 2, and a housing 3, which are movably connected and concentrically arranged from left to right. The housing 3 is fitted with an inner liner 6 having a central cavity. Secondary flow inlets are provided on the upper and lower sides of the cavity of the inner liner 6. A nozzle 7 is threadedly connected to the center of the inner liner 6, and a bellows 5 is threadedly connected to the rear of the nozzle 7. One end of the bellows 5 is connected to a gas-water mixing input pipe. The movable connections include, but are not limited to, snap-fit ​​connections and threaded connections.

[0032] The left end of the diffuser head 1 is the outlet section 11, and the right end is the diffuser head connecting section 12. The cross-sectional area of ​​the outlet section 11 gradually decreases from left to right, and the rightmost end is connected to the diffuser head connecting section 12.

[0033] A diffuser head connecting protrusion 121 extends upward on the outer peripheral wall of the diffuser head connecting section 12.

[0034] The leftmost end of the outer casing 3 has an outer casing connecting section 31, and an outer casing connecting section protrusion 311 extends upward on the outer peripheral wall of the outer casing connecting section 31.

[0035] The inner peripheral wall of the connecting pipe 2 matches the outer peripheral wall of the diffuser connecting section 12 and the outer peripheral wall of the outer shell connecting section 31. Two grooves 21 are provided on the inner peripheral wall of the connecting pipe 2. The grooves 21 are respectively connected to the diffuser connecting protrusion 121 and the outer shell connecting section protrusion 311.

[0036] The two ends of the connecting pipe 2 are fitted with sealing rings 9, one of which abuts against the diffuser head 1 and the other sealing ring 9 abuts against the outer shell 3.

[0037] The secondary flow inlets are the upper secondary flow inlet 61 located above and the lower secondary flow inlet 62 located below. The leftmost ends of the upper secondary flow inlet 61 and the lower secondary flow inlet 62 are connected to the outer shell connecting section 31.

[0038] An inner separation interface 621 is provided on the bottom wall of the lower secondary flow inlet 62, and an outer separation interface 32 is provided on the bottom wall of the outer shell 3. When the inner liner 6 is fitted inside the outer shell 3, the inner separation interface 621 and the outer separation interface 32 are connected.

[0039] The outermost wall of the nozzle 7 has a threaded part 71 that is threaded to the inner liner 6, and the leftmost end is the nozzle 72. The outermost wall of the nozzle 72 is fitted with a top cover 8.

[0040] An extension sleeve 4 is connected to the outer peripheral wall of the rightmost end of the outer casing 3.

[0041] In one embodiment, the nozzle operates on the following principle.

[0042] Specifically, one sealing ring 9 is fitted onto the diffuser head connecting section 12 of the diffuser head 1, with one end abutting against the outlet section 11. The diffuser head connecting section 12 is inserted into the connecting pipe 2 and rotated. When the diffuser head connecting protrusion 121 falls into the groove 21, the connection is completed. At this time, the other end of the sealing ring 9 abuts against the connecting pipe 2. Then, another sealing ring 9 is fitted onto the outer shell connecting section 31 of the outer shell 3, with one end abutting against the outer shell 3. The outer shell connecting section 31 is inserted into the connecting pipe 2 and rotated. When the outer shell connecting section protrusion 311 falls into the groove 21, the connection is completed. At this time, the other end of the sealing ring 9 abuts against the connecting pipe 2.

[0043] Connect the threaded part 71 on the nozzle 7 to the inner liner 6 so that the nozzle 7 is installed on the inner liner 6. Then install the inner liner 6 inside the outer casing 3. The inner separation interface 621 and the outer separation interface 32 are connected through the inner liner 6. The low-pressure gas used for gas-water separation is connected to the inner separation interface 621 and the outer separation interface 32 through a rubber tube, so that the secondary flow can react again.

[0044] After connecting the rightmost end of the threaded part 71 to the bellows 5, and then connecting one end of the bellows 5 to the high gas, the operation can begin. When hydrogen is introduced into the nozzle 7 from the hydrogen cylinder, the strong gas pressure will cause the nozzle 7 to press the top cover 8 against the leftmost end of the liner 6. At this time, the nozzle 72 abuts against the inner wall of the liner 6, ensuring that the nozzle 7 is fixed.

[0045] The device simplifies disassembly and installation by incorporating a diffuser head 1, connecting pipe 2, and outer casing 3 with movable connections. The nozzle 7 with threaded section 71 allows for threaded connection with the inner liner 6, while also adjusting the distance between the nozzle 72 and connecting pipe 2, thus improving assembly efficiency. The bellows 5 allows for adjustment of the pipe length when it is filled with air pressure, adapting to various working conditions. This solves the technical problem that traditional ejector structures are mostly fixed, with their integrated structure and nozzle cross-sectional area predetermined from the initial design and unable to be adjusted.

[0046] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A detachable nozzle for testing a fuel cell ejector-type hydrogen recirculation system, characterized in that: It includes a diffuser head (1), a connecting pipe (2) and a shell (3) arranged concentrically and movably connected from left to right. The shell (3) is fitted with an inner liner (6) with a central cavity. The upper and lower sides of the cavity of the inner liner (6) are provided with secondary inlets. The center of the inner liner (6) is threadedly connected to a nozzle (7). The rear of the nozzle (7) is threadedly connected to a bellows pipe (5). One end of the bellows pipe (5) is connected to a steam-water mixing input pipe.

2. The detachable nozzle for testing a fuel cell ejector-type hydrogen recirculation system according to claim 1, characterized in that: The left end of the diffuser head (1) is the outlet section (11), and the right end is the diffuser head connecting section (12). The cross-sectional area of ​​the outlet section (11) gradually decreases from left to right, and the rightmost end is connected to the diffuser head connecting section (12).

3. The detachable nozzle for testing a fuel cell ejector-type hydrogen recirculation system according to claim 2, characterized in that: A diffuser head connecting protrusion (121) extends upward on the outer peripheral wall of the diffuser head connecting section (12).

4. The detachable nozzle for testing a fuel cell ejector-type hydrogen recirculation system according to claim 3, characterized in that: The leftmost end of the outer shell (3) has an outer shell connecting section (31), and an outer shell connecting section protrusion (311) extends upward on the outer peripheral wall of the outer shell connecting section (31).

5. A detachable nozzle for testing a fuel cell ejector-type hydrogen recirculation system according to claim 4, characterized in that: The inner peripheral wall of the connecting pipe (2) matches the outer peripheral wall of the diffuser connecting section (12) and the outer peripheral wall of the outer shell connecting section (31). Two grooves (21) are opened on the inner peripheral wall of the connecting pipe (2), and the grooves (21) are respectively connected to the diffuser connecting protrusion (121) and the outer shell connecting section protrusion (311).

6. A detachable nozzle for testing a fuel cell ejector-type hydrogen recirculation system according to claim 5, characterized in that: The two ends of the connecting pipe (2) are fitted with sealing rings (9), one of which abuts against the diffuser head (1) and the other sealing ring (9) abuts against the outer shell (3).

7. A detachable nozzle for testing a fuel cell ejector-type hydrogen recirculation system according to claim 6, characterized in that: The secondary flow inlets are an upper secondary flow inlet (61) located above and a lower secondary flow inlet (62) located below. The leftmost ends of the upper secondary flow inlet (61) and the lower secondary flow inlet (62) are connected to the outer shell connecting section (31).

8. A detachable nozzle for testing a fuel cell ejector-type hydrogen recirculation system according to claim 7, characterized in that: An inner separation interface (621) is provided on the bottom wall of the lower secondary flow inlet (62), and an outer separation interface (32) is provided on the bottom wall of the outer shell (3). When the inner liner (6) is fitted inside the outer shell (3), the inner separation interface (621) and the outer separation interface (32) are connected.

9. A detachable nozzle for testing a fuel cell ejector-type hydrogen recirculation system according to claim 8, characterized in that: The rightmost outer peripheral wall of the nozzle (7) is provided with a threaded part (71) that is threaded to the inner lining (6), and the leftmost end is a nozzle (72). A top cover (8) is fitted on the leftmost outer peripheral wall of the nozzle (72).

10. A detachable nozzle for testing a fuel cell ejector-type hydrogen recirculation system according to claim 9, characterized in that: An extension sleeve (4) is connected to the outer peripheral wall of the rightmost end of the outer shell (3).

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