Conical nozzle structure capable of reducing initial opening flow

Abstract

The utility model discloses a conical nozzle structure capable of reducing initial opening flow, and particularly relates to the technical field of hydrogen injection valve nozzles, which comprises a valve body, an air inlet pipe communicated with one side of the valve body, a plurality of first screws fixedly connected with the top of the valve body, a connecting shell arranged at the top of the valve body, and a plurality of second screws fixedly connected with the top of the connecting shell. The upper surface of the connecting shell is fixedly connected with a shell, the top of the shell is fixedly connected with a protective shell, the outer side of the protective shell is in threaded connection with two third screws, a throttling mechanism is arranged at the bottom of the valve body, and sealing mechanisms are arranged on the outer sides of the valve body and the connecting shell. The air inlet flow is reduced through the two throttling points, so that the valve element is lifted more stably, and the output flow is kept constant; the sealing performance is improved, the system pressure is maintained to be stable, the consistency of hydrogen flow and pressure is ensured, and therefore the stability of gas flow is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen injection valve nozzle technology, and more specifically, to a conical nozzle structure for reducing initial flow rate. Background Technology

[0002] Hydrogen injection valves are widely used in hydrogen fuel cells, aerospace and chemical industries, and the performance requirements for nozzle structures are increasing. The nozzle structure of the hydrogen injection valve is used to precisely control the flow and pressure of hydrogen to ensure its efficient and stable operation during combustion or reaction. Traditional nozzles mostly adopt conical or cylindrical structures and adjust the flow through a single throttling point, but there are problems such as inaccurate flow control and large pressure fluctuations.

[0003] In actual use, when the hydrogen injection valve is initially opened, the flow area between the valve core and the nozzle is large, resulting in a large gas flow rate. When the inlet gas pressure is unstable, the gas flow entering the valve is unstable, causing large fluctuations in the valve flow rate and affecting the safe use of the hydrogen injection valve. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a conical nozzle structure for reducing the initial flow rate, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A conical nozzle structure for reducing initial flow rate includes a valve body with an air inlet pipe connected to one side. Multiple screws are fixedly connected to the top of the valve body. A connecting shell is located on the top of the valve body, and multiple screws are fixedly connected to the top of the connecting shell. An outer shell is fixedly connected to the upper surface of the connecting shell, and a protective shell is fixedly connected to the top of the outer shell. Two screws are threadedly connected to the outer side of the protective shell. A throttling mechanism is located at the bottom of the valve body, including a nozzle. The outer side of the nozzle is fixedly connected to the bottom of the valve body, and a nozzle is fixedly connected to the inner side of the nozzle. A sleeve is fixedly connected to the inner side of the outer shell, and a connecting rod is slidably connected to the inner side of the sleeve. A valve core is fixedly connected to the bottom of the connecting rod. A throttling protrusion is located on the outer side of the valve core, and a throttling protrusion is located on the bottom of the valve core. A second throttling protrusion is located on the bottom of the sleeve. A support base is fixedly connected to the bottom of the support base, and a second support base is fixedly connected to the bottom of the spring. The inner side of the second support base is fixedly connected to the outer side of the connecting rod. A sealing mechanism is located on the outer side of the valve body and the connecting shell.

[0007] By adopting the above technical solution, two throttling protrusions are set on the outside of the valve core, so that two throttling points are formed between the valve core and the nozzle, which throttles the gas and makes the gas flow rate decrease gradually when the valve core is initially opened.

[0008] As a further description of the above technical solution: the sealing mechanism includes two hollow washers, one side of which is fixedly connected to the outside of the connecting shell. The valve body and the outside of the connecting shell are both provided with slots, and the outside of the hollow washers is engaged with the inside of the slots. Nuts are threaded onto the outside of multiple screws one and screw two.

[0009] By adopting the above technical solution, the mutual insertion of hollow gaskets and slots, and the deformation of the hollow gaskets inside the slots, the sealing performance of the valve body is further improved, and the flow of gas in the valve body is more stable.

[0010] The technical effects and advantages of this utility model are as follows:

[0011] 1. By setting a throttling mechanism, compared with the existing technology, the intake flow rate is reduced by using two throttling points formed by throttling protrusion one and throttling protrusion two and the nozzle. After the flow rate is reduced, the upward force on the valve core is reduced, so that the valve core is raised and stabilized, and the output flow rate is kept stable.

[0012] 2. By setting up a sealing mechanism, compared with the existing technology, the interlocking and compression sealing of hollow gaskets and slots improves the sealing performance, helps maintain stable system pressure, ensures consistent hydrogen flow and pressure, and thus enhances the stability of gas flow. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the front structure of this utility model.

[0015] Figure 3 This is a partial schematic diagram of the connection between the nozzle and the valve core of this utility model.

[0016] Figure 4 This is a partial schematic diagram of the connection between the connecting block and the screw of this utility model.

[0017] Figure 5 This is a partial schematic diagram of the connection between the outer shell and the hollow gasket of this utility model.

[0018] Figure 6 For the present utility model Figure 4 An enlarged diagram of A in the diagram.

[0019] The attached diagram is labeled as follows: 1. Valve body; 2. Inlet pipe; 3. Screw 1; 4. Connecting shell; 5. Screw 2; 6. Outer shell; 7. Protective shell; 8. Screw 3; 9. Nozzle; 10. Nozzle; 11. Linkage rod; 12. Valve core; 13. Throttling protrusion 1; 14. Throttling protrusion 2; 15. Support base 1; 16. Spring; 17. Support base 2; 18. Hollow washer; 19. Slot; 20. Nut; 21. Sleeve. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] The embodiments disclosed in this application are as follows: Figure 1-6 The cone nozzle structure shown includes a valve body 1, an air inlet pipe 2 connected to one side of the valve body 1, multiple screws 3 fixedly connected to the top of the valve body 1, a connecting shell 4 provided on the top of the valve body 1, multiple screws 5 fixedly connected to the top of the connecting shell 4, an outer shell 6 fixedly connected to the upper surface of the connecting shell 4, a protective shell 7 fixedly connected to the top of the outer shell 6, two screws 8 threadedly connected to the outer side of the protective shell 7, a throttling mechanism provided at the bottom of the valve body 1, the throttling mechanism including a nozzle 9, the outer side of the nozzle 9 fixedly connected to the bottom of the valve body 1, a nozzle 10 fixedly connected to the inner side of the nozzle 9, a sleeve 21 fixedly connected to the inner side of the outer shell 6, a connecting rod 11 slidably connected to the inner side of the sleeve 21, a valve core 12 fixedly connected to the bottom of the connecting rod 11, a throttling protrusion 13 provided on the outer side of the valve core 12, and a throttling protrusion 2 at the bottom of the valve core 12. 14. A support base 15 is fixedly connected to the bottom of the sleeve 21. A spring 16 is fixedly connected to the bottom of the support base 15. A support base 27 is fixedly connected to the bottom of the spring 16. The inner side of the support base 27 is fixedly connected to the outer side of the connecting rod 11. A sealing mechanism is provided on the outer side of the valve body 1 and the connecting shell 4. The connecting shell 4 and the outer shell 6 are installed on the corresponding screws 11 and 25 in sequence. Then, the spring 16 pushes the support base 27 to push the connecting rod 11 and the valve core 12 downward, so that the valve core 12 can squeeze and seal the nozzle 10. After the valve is opened, the connecting rod 11 drives the valve core 12 to move upward inside the nozzle 10. Through the gap formed between the throttling protrusion 13 and throttling protrusion 24 on the outer side of the valve core 12 and the nozzle 10, the gas can be smoothly output through the nozzle 10 and the nozzle 9.

[0022] Reference Figure 5 and Figure 6As shown, the sealing mechanism includes two hollow washers 18. One side of the hollow washers 18 is fixedly connected to the outside of the connecting shell 4. The valve body 1 and the connecting shell 4 are both provided with slots 19. The outside of the hollow washers 18 is engaged with the inside of the slots 19. Nuts 20 are threaded onto the outside of multiple screws 1 3 and screws 2 5. The multiple hollow washers 18 on the upper and lower sides of the connecting shell 4 are used to insert into the slots 19 on the outside of the valve body 1 and the outer shell 6. During the process of tightening the valve body 1, the connecting shell 4 and the outer shell 6 with the nuts 20, the hollow washers 18 will be squeezed and deformed inside the slots 19, making the connection between the valve body 1, the connecting shell 4 and the outer shell 6 tighter and having better pressure resistance.

[0023] The working principle of this utility model is as follows: When the hydrogen injection valve is in use, after the hydrogen injection valve is opened, the connecting rod 11 drives the valve core 12 to slide inside the valve body 1, connecting shell 4, and outer shell 6. At the same time, the connecting rod 11 drives the support seat 17 to compress the spring 16. The valve core 12 moves upward from the top of the nozzle 10. During the upward movement of the valve core 12, the throttling protrusion 13 on the outer side of the valve core 12 separates from the inner side of the nozzle 10, allowing hydrogen gas to pass through the inlet pipe 2, pass through the throttling protrusion 13, and move towards the side of the throttling protrusion 14. After a certain buffering between the throttling protrusion 13 and the throttling protrusion 14, the hydrogen gas then passes through the throttling protrusion 14 and the inner side of the nozzle 10. The gap is formed, and the gas passes downward through the nozzle 10 and is output through the nozzle 9. When assembling the hydrogen injection valve, first align the bottom of the connecting shell 4 with the multiple screws 3 on the top of the valve body 1, and then thread the multiple nuts 20 to the screws 3 on the top of the valve body 1. Then align the bottom of the outer shell 6 with the multiple screws 5 on the top of the connecting shell 4 and thread them through the multiple nuts 20. Insert the two hollow washers 18 on the upper and lower sides of the connecting shell 4 into the inner side of the outer slot 19 of the valve body 1 and the outer shell 6. After the hollow washer 18 enters the inside of the slot 19, it will deform under pressure to fill the gap, so that when the gas is released inside the valve body 1, it can be concentrated and output through the nozzle 10.

[0024] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are not shown in the figures because they are existing technologies, and will not be described here.

[0025] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A conical nozzle structure for reducing initial flow rate, comprising a valve body (1), characterized in that: The valve body (1) is connected to an air inlet pipe (2) on one side. Multiple screws (3) are fixedly connected to the top of the valve body (1). A connecting shell (4) is provided on the top of the valve body (1). Multiple screws (5) are fixedly connected to the top of the connecting shell (4). An outer shell (6) is fixedly connected to the upper surface of the connecting shell (4). A protective shell (7) is fixedly connected to the top of the outer shell (6). Two screws (8) are threadedly connected to the outer side of the protective shell (7). A throttling mechanism is provided at the bottom of the valve body (1). A sealing mechanism is provided on the outer side of the valve body (1) and the connecting shell (4). A sleeve (21) is fixedly connected to the inner side of the outer shell (6). A connecting rod (11) is slidably connected to the inner side of the sleeve (21). A valve core (12) is fixedly connected to the bottom of the connecting rod (11). A throttling protrusion one (13) is provided on the outer side of the valve core (12). A throttling protrusion two (14) is provided at the bottom of the valve core (12).

2. The conical nozzle structure for reducing initial flow rate according to claim 1, characterized in that: The throttling mechanism includes a nozzle (9), the outer side of which is fixedly connected to the bottom of the valve body (1), and a nozzle (10) is fixedly connected to the inner side of the nozzle (9).

3. The conical nozzle structure for reducing initial flow rate according to claim 1, characterized in that: The bottom of the sleeve (21) is fixedly connected to a support base (15), and the bottom of the support base (15) is fixedly connected to a spring (16).

4. The conical nozzle structure for reducing initial flow rate according to claim 3, characterized in that: The bottom of the spring (16) is fixedly connected to a support base (17), and the inner side of the support base (17) is fixedly connected to the outer side of the connecting rod (11).

5. The conical nozzle structure for reducing initial flow rate according to claim 1, characterized in that: The sealing mechanism includes two hollow washers (18). One side of the hollow washers (18) is fixedly connected to the outside of the connecting shell (4). The valve body (1) and the connecting shell (4) are both provided with slots (19). The outside of the hollow washers (18) is engaged with the inside of the slots (19). Nuts (20) are threaded onto the outside of the screws one (3) and screw two (5).

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