Vertical injection proportional valve and ejector suite

Abstract

The utility model discloses a vertical injection proportional valve and ejector suite, which comprises a proportional valve body and an ejector body, the ejector body is provided with a through hole, the proportional valve body is arranged in the through hole, and one end of the proportional valve body, which is arranged in the ejector body, is provided with an injector head assembly; the injector head assembly comprises a sliding block connected with the inner wall of the proportional valve body in a sliding mode. According to the utility model, the embedded proportional valve body is matched with the ejector body, so that the proportional valve can be directly embedded and mounted in the ejector body, the limiting sleeve is matched to fix the injector head assembly, and the elbow is arranged, so that the exhaust direction when the proportional valve body conveys hydrogen into the ejector body can be changed; by means of the design, the structure of the proportional valve and the ejector in the combined installation process is optimized, and the whole ejector is more compact.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a vertical injection proportional valve and an ejector kit. Background Art

[0002] In the gas path design of fuel cells, the scheme of proportional valve + ejector is widely adopted. It is a simple and compact hydrogen path design. Hydrogen is pressure-regulated through the proportional valve, and the valve is integrated with the primary flow nozzle of the ejector, simplifying the structure. The proportional valve adjusts the opening degree in real time according to the hydrogen pressure at the inlet of the stack, ensuring the stable operation of the system under different working conditions, realizing the effective circulation of hydrogen. The hydrogen flow at the outlet of the ejector is divided into two parts and sent to two stacks to participate in the reaction. This design is not only simple in structure but also improves the utilization rate of hydrogen.

[0003] In the prior art, in the traditional proportional valve + ejector, since the proportional valve and the ejector are mostly long strip-shaped and hydrogen needs to pass through and be connected, a design scheme of perpendicular setting and connection is often adopted. When hydrogen enters the ejector from the proportional valve, the pressure in the ejector is relatively high, and the proportional valve needs to have a greater driving air pressure to ensure the input of hydrogen. On the other hand, when hydrogen enters the ejector from the proportional valve, the vertically flowing hydrogen will generate air resistance, reducing the ejector capacity of the ejector. For this reason, we propose a vertical injection proportional valve and an ejector kit to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problems existing in the prior art, and to propose a vertical injection proportional valve and an ejector kit.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A vertical injection proportional valve and an ejector kit, comprising a proportional valve body and an ejector body. A through hole is provided on the ejector body, and the proportional valve body is arranged in the through hole. An injection head assembly is arranged at one end of the proportional valve body inside the ejector body;

[0007] The injection head assembly includes a slider slidably connected to the inner wall of the proportional valve body. A central hole is provided in the middle of the slider. An elbow is fixedly connected to the lower end of the slider, and the elbow is communicated with the central hole. A nozzle is arranged at one end of the elbow away from the slider. A flow guide plate is arranged on the side wall of the elbow away from the nozzle. A limiting sleeve is arranged at the lower end of the ejector body, and the lower end of the slider abuts against the limiting sleeve.

[0008] Preferably, the proportional valve body includes a main body, and a valve core is arranged in the main body. The valve core is abutted against the slider. A medium-pressure air inlet is formed in the side wall at the lower end of the main body, and a first annular groove is formed at the lower end of the main body. A first density washer is arranged in the first annular groove. An installation plate is fixedly connected to one side of the main body, and an installation groove matching the installation plate is arranged on the ejector body.

[0009] Preferably, a baffle is arranged on the inner wall at the lower end of the through hole. The limit sleeve is abutted against the baffle, and the inner diameter of the limit sleeve is smaller than the outer diameter of the slider.

[0010] Preferably, a second annular groove is formed in the side wall of the slider, and a second sealing washer is arranged in the second annular groove.

[0011] Preferably, a diffuser is slidably connected in the nozzle, and the diffuser is conical.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] In the present utility model, by arranging the embedded proportional valve body in cooperation with the ejector body, the proportional valve can be directly embedded and installed in the ejector body, and the fixing of the spray head assembly is realized by matching with the limit sleeve. By arranging the elbow, the exhaust direction when the proportional valve body conveys hydrogen into the ejector body can be changed, thereby avoiding the formation of air resistance in the ejector body and ensuring the smoothness of the ejector body. This design not only optimizes the structure when the proportional valve and the ejector are combined and installed, making the whole more compact, but also facilitates the integration of the axial air inlet ejector. In the axial ejector scheme, the flow resistance of the ejector itself can also be reduced, and the ejecting ability of the ejector can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic cross-sectional structure diagram of a vertical injection proportional valve and ejector kit proposed by the present utility model;

[0015] Figure 2 is a schematic structure diagram of the proportional valve body of a vertical injection proportional valve and ejector kit proposed by the present utility model;

[0016] Figure 3 is Figure 1 the enlarged structure diagram at A in

[0017] In the figure: 1, proportional valve body; 2, ejector body; 3, slider; 4, central hole; 5, elbow; 6, nozzle; 7, guide plate; 8, limit sleeve; 9, main body; 10, valve core; 11, medium-pressure air inlet; 12, installation plate; 13, baffle; 14, first density washer; 15, second sealing washer; 16, diffuser. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Reference Figures 1-3 A vertical injection proportional valve and ejector kit, comprising a proportional valve body 1 and an ejector body 2, wherein the ejector body 2 is an ejector with axial air intake, a through hole is provided on the ejector body 2, the proportional valve body 1 is arranged in the through hole, and an ejector head assembly is arranged at one end of the proportional valve body 1 located inside the ejector body 2;

[0020] Based on the above design, the through hole provided on the ejector body 2 is used to accommodate part of the proportional valve body 1, thereby realizing the combined installation of the proportional valve body 1 and the ejector body 2, optimizing the combined structure, and eliminating the need to set up a pipeline for communication;

[0021] The injection head assembly includes a slider 3 slidably connected to the inner wall of the proportional valve body 1, a center hole 4 is opened in the middle of the slider 3, an elbow 5 is fixedly connected to the lower end of the slider 3, the elbow 5 is connected to the center hole 4, a nozzle 6 is arranged at one end of the elbow 5 away from the slider 3, a guide plate 7 is arranged on the side wall of the elbow 5 away from the nozzle 6, a limit sleeve 8 is arranged at the lower end of the ejector body 2, and the lower end of the slider 3 is arranged against the limit sleeve 8;

[0022] In this design, the elbow 5 is a 90° bent pipe, and the slider 3 is used to install and fix the elbow 5. At the same time, the limit sleeve 8 is against the inner wall of the through hole. In this design, the elbow 5 is used to change the airflow direction when the proportional valve body 1 transports hydrogen to the ejector body 2, so that the airflow direction is the same as the flow direction of the medium in the ejector body 2, thereby effectively avoiding the occurrence of gas resistance, and at the same time will not increase the flow resistance in the ejector body 2, thereby improving the ejection capacity of the ejector. On the other hand, when replacing the parts in the proportional valve body 1, the proportional valve body 1 is directly taken out from the through hole, the limit sleeve 8 can be removed and the slider 3 can be taken out, and the proportional valve body 1 can be disassembled.

[0023] Further, the proportional valve body 1 includes a main body 9, and a valve core 10 is arranged in the main body 9, and the valve core 10 is arranged against the slider 3, a medium-pressure air inlet 11 is provided on the lower end side wall of the main body 9, and a first annular groove is provided at the lower end of the main body 9, and a first density gasket 14 is arranged in the first annular groove, a mounting plate 12 is fixedly connected to one side of the main body 9, and a mounting groove matching the mounting plate 12 is provided on the ejector body 2;

[0024] In the above design, the design in which the valve core 10 abuts against the slider 3 enables, after the user mounts the proportional valve body 1 on the ejector body 2 by means of the mounting plate 12, the slider 3 to be fixed by the limit sleeve 8, and then the valve core 10 to be fixed by the slider 3. When the valve core 10 needs to be replaced after long-term use, the proportional valve body 1 can be directly removed from the through hole to complete the disassembly operation. This also makes the proportional valve body 1 and the injector body form an integral component. The first annular groove provided at the lower end of the main body 9 and the first sealing washer are used to ensure the sealing between the proportional valve body 1 and the inner wall of the through hole.

[0025] Furthermore, a baffle 13 is provided on the inner wall of the lower end of the through hole. The limit sleeve 8 abuts against the baffle 13, and the inner diameter of the limit sleeve 8 is smaller than the outer diameter of the slider 3.

[0026] The baffle 13 and the ejector body 2 are an integral part and are used to limit the position of the limit sleeve 8.

[0027] Furthermore, a second annular groove is provided on the side wall of the slider 3, and a second sealing washer 15 is provided in the second annular groove. The second annular groove and the second sealing ring are used to seal between the slider 3 and the inner wall of the proportional valve body 1, so as to ensure that the hydrogen passing through the proportional valve body 1 enters the elbow 5 through the central hole 4 and then enters the ejector body 2 from the elbow 5.

[0028] Furthermore, a diffuser port 16 is slidably connected in the nozzle 6, and the diffuser port 16 is conical. In this design, the diffuser port 16 is used to make the hydrogen flow out of the elbow 5 more dispersedly, avoiding the generation of air resistance due to the hydrogen being too concentrated. The sliding connection is provided to extend the length of the overlapping part of the axis of the elbow 5 and the axially entering ejector body 2, ensuring that the air flow direction is completely adjusted to coincide with the axis of the ejector body 2. On the other hand, it is used to facilitate the installation by the user, avoiding the situation that the installation is difficult due to the excessive length of the elbow pipe or even the elbow 5 being damaged during the combined installation process.

[0029] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A vertical injection proportional valve and ejector kit, comprising a proportional valve body (1) and an ejector body (2), characterized in that: The ejector body (2) is provided with a through hole, the proportional valve body (1) is arranged in the through hole, and an injection head assembly is arranged at one end of the proportional valve body (1) located inside the ejector body (2); The injection head assembly comprises a slider (3) slidably connected to the inner wall of the proportional valve body (1), a center hole (4) is opened in the middle of the slider (3), an elbow (5) is fixedly connected to the lower end of the slider (3), the elbow (5) is connected to the center hole (4), a nozzle (6) is arranged at the end of the elbow (5) away from the slider (3), a guide plate (7) is arranged on the side wall of the elbow (5) away from the nozzle (6), a limit sleeve (8) is arranged at the lower end of the ejector body (2), and the lower end of the slider (3) is arranged to abut against the limit sleeve (8).

2. A vertical injection proportional valve and ejector kit according to claim 1, characterized in that: The proportional valve body (1) comprises a main body (9), and a valve core (10) is arranged in the main body (9), and the valve core (10) is arranged to abut against the slider (3). The lower end side wall of the main body (9) is provided with a medium-pressure air inlet (11), and the lower end of the main body (9) is provided with a first annular groove, and a first density gasket (14) is arranged in the first annular groove. A mounting plate (12) is fixedly connected to one side of the main body (9), and a mounting groove matching the mounting plate (12) is arranged on the ejector body (2).

3. A vertical injection proportional valve and ejector kit according to claim 1, characterized in that: A baffle (13) is provided on the inner wall of the lower end of the through hole, the limiting sleeve (8) is arranged to abut against the baffle (13), and the inner diameter of the limiting sleeve (8) is smaller than the outer diameter of the slider (3).

4. A vertical injection proportional valve and ejector kit according to claim 1, characterized in that: A second annular groove is formed on the side wall of the sliding block (3), and a second sealing gasket (15) is arranged in the second annular groove.

5. A vertical injection proportional valve and ejector kit according to claim 1, characterized in that: A diffusion port (16) is slidably connected inside the nozzle (6), and the diffusion port (16) is conical.

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