A hydrogenation port

Abstract

This utility model relates to a hydrogen filling port, including a valve body, a first filter element connected to the inlet end of the valve body cavity, a second sealing ring provided between the first filter element and the inner wall of the valve body, a valve seat connected to the outlet end of the valve body cavity, a third sealing ring connected between the valve seat and the first filter element, a spring seat with a convex structure connected to the other end of the valve seat, a spring groove formed on the convex structure of the valve seat, a first spring connected in the spring groove, the lower end of the valve disc being movably connected within the spring groove via the first spring, the upper end of the valve disc being located between the valve seat and the first filter element, a connector extending into the valve body being connected to the inner wall of the valve body with a sealing element, a detachable second filter element connected in the cavity of the connector, and a second spring connected between the second filter element and the spring seat. This utility model improves the filtration efficiency of the hydrogen filling port, significantly reducing the impurity content in the hydrogen cylinder.

Description

Technical Field

[0001] This utility model belongs to the field of gas treatment and filtration technology, and in particular relates to a hydrogen filling port. Background Technology

[0002] During hydrogen refueling, the hydrogen needs to undergo strict purity control to avoid damage to the hydrogen storage cylinders and refueling equipment. To ensure high hydrogen purity, an additional filter is usually installed after the refueling port to remove impurities and particulate matter.

[0003] In traditional hydrogen refueling systems, filters such as particulate filters and activated carbon filters are typically used. While these filters can effectively remove impurities from hydrogen, they increase the complexity of the equipment and maintenance costs.

[0004] Existing filtration technologies:

[0005] Particulate filters: These typically use high-efficiency filter paper or fiber materials to capture particulate matter in gases. While effective, the filter paper is prone to clogging and requires regular replacement, increasing maintenance costs.

[0006] Activated carbon filters: used to remove organic matter and odors from gases. Although they have good adsorption performance, their processing capacity is limited, and they require regular replacement and treatment.

[0007] Membrane filtration technology: This technology uses membrane materials for gas separation and filtration, offering high purity and efficiency. However, membrane filters are typically expensive, significantly impacting the overall cost of the system.

[0008] In traditional hydrogen refueling systems, an additional filter is often installed after the hydrogen refueling port to ensure hydrogen purity. While this improves hydrogen purity, it increases the number of system components and maintenance complexity.

[0009] Additional filters not only increase initial investment, but also require regular replacement and maintenance, further increasing long-term operating costs.

[0010] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create a new type of hydrogenation port with greater industrial application value. Utility Model Content

[0011] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a hydrogenation port.

[0012] To achieve the above objectives, the present invention adopts the following technical solution:

[0013] A hydrogenation port, including a valve body,

[0014] It also includes,

[0015] A first filter element is connected to the air inlet end within the valve body cavity, and a second sealing ring is provided between the first filter element and the inner wall of the valve body.

[0016] A valve seat is connected to the air outlet end within the valve body cavity. One end of the valve seat is in contact with the first filter element, and a third sealing ring connects the valve seat and the first filter element at the contact point.

[0017] A spring seat, which has a convex structure, is connected to the other end of a valve seat. A spring groove is formed on the convex structure of the valve seat, which extends into the valve seat, and a first spring is connected within the spring groove.

[0018] The valve disc has its lower end movably connected within a spring groove via a first spring, and its upper end located between the valve seat and the first filter element, forming a sealing structure with a third sealing ring via the first spring.

[0019] The connector is attached to the air outlet end within the valve body cavity and fixes the valve seat and spring seat within the valve body. A sealing element is connected between the connector, which extends into the valve body, and the inner wall of the valve body.

[0020] A second filter element is connected to the cavity of the connector; a second spring connects the second filter element to the spring seat.

[0021] A lock nut is used to lock the hydrogen filling port onto the panel; the lock nut is connected to the external thread of the connector.

[0022] Preferably, in the hydrogenation port, a protective cap is connected to the inlet of the valve body, the protective cap has a groove, and a fourth sealing ring is connected in the groove to form a seal between the protective cap and the valve body.

[0023] Preferably, in the hydrogen filling port, the end of the protective cap is provided with a vent hole and a through hole communicating with the vent hole.

[0024] Preferably, in the hydrogenation port, a plastic-coated steel wire rope is threaded through the through hole, and one end of the plastic-coated steel wire rope is connected to the valve body.

[0025] Preferably, in the hydrogenation port, the plastic-coated steel wire rope is connected to an aluminum buckle for clamping and fixing the plastic-coated steel wire rope.

[0026] Preferably, in the hydrogen filling port, the first filter element has a conical structure and includes a separately disposed filter element seat and a filter screen. The filter element seat has a conical structure and toothed grooves for connecting and fixing the filter screen are formed on the conical filter element seat. The toothed grooves are arranged in a spiral shape from top to bottom. The filter element seat has a medium flow channel groove. The filter screen is formed by hydrogen unwinding and is connected to the filter element seat through the toothed grooves. The filtration accuracy of the filter screen is 50μm, and the filtration accuracy of the second filter element is 15μm.

[0027] Preferably, in the hydrogenation port, the sealing element includes a fifth sealing ring and a sealing retainer ring, and a sealing groove is provided on the connector, wherein the fifth sealing ring and the sealing retainer ring are connected in the sealing groove.

[0028] Preferably, in the hydrogen filling port, a first sealing ring is connected inside the cavity of the valve body. The first sealing ring is located at the front end of the first filter element and is an explosion-proof O-ring.

[0029] Preferably, in the hydrogen filling port, the second sealing ring is a low-temperature O-ring, and the third sealing ring is an explosion-proof O-ring.

[0030] By means of the above solution, this utility model has at least the following advantages:

[0031] This invention improves the filtration efficiency of the hydrogen filling port, significantly reducing the impurity content in the hydrogen cylinder. Compared to traditional hydrogen filling ports, the addition of a second filter element increases the purity of the hydrogen, while eliminating the need for an additional filter in the system, effectively reducing costs.

[0032] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0037] Example 1

[0038] like Figure 1 As shown, a hydrogenation port includes a valve body 2.

[0039] The first filter element 3 is connected to the air inlet end of the valve body 2 cavity, and a second sealing ring 4 is provided between the first filter element 3 and the inner wall of the valve body 2.

[0040] Valve seat 10 is connected to the air outlet end inside the valve body 2 cavity. One end of the valve seat 10 is in contact with the first filter element 3, and a third sealing ring 5 is connected between the valve seat 10 and the first filter element 3 at the contact point.

[0041] A spring seat 11, which has a convex structure, is connected to the other end of the valve seat 10. A spring groove is formed on the convex structure of the valve seat 10, which extends into the valve seat 10, and a first spring 7 is connected within the spring groove.

[0042] The lower end of valve disc 6 is movably connected within a spring groove via a first spring 7, and the upper end of valve disc 6 is located between valve seat 10 and first filter element 3, with the upper end of valve disc 6 forming a sealing structure with the third sealing ring 5 via the first spring 7.

[0043] Connector 12 is connected to the air outlet end inside the valve body 2 cavity and fixes the valve seat 10 and spring seat 11 inside the valve body 2. A sealing element is connected between the connector 12, which extends into the valve body 2, and the inner wall of the valve body 2.

[0044] The second filter element 15 is connected to the cavity of the connector 12. A second spring 14 is connected between the second filter element 15 and the spring seat 11.

[0045] Locking nut 13 is used to lock the hydrogen filling port onto the panel, and the locking nut 13 is connected to the external thread of the connector 12.

[0046] In this utility model, a protective cap 17 is connected to the inlet of the valve body 2. The protective cap 17 has a groove, and a fourth sealing ring 16 is connected in the groove to form a seal between the protective cap 17 and the valve body 2. The end of the protective cap 17 has a vent hole and a through hole communicating with the vent hole. A plastic-coated steel wire rope 19 is threaded through the through hole. One end of the plastic-coated steel wire rope 19 is connected to the valve body 2. An aluminum buckle 18 for clamping and fixing the plastic-coated steel wire rope is connected to the plastic-coated steel wire rope 19.

[0047] In this invention, the first filter element 3 has a conical structure and includes a separate filter element seat and a filter screen. The filter element seat is made of copper alloy and has a conical structure. The conical filter element seat has toothed grooves for connecting and fixing the filter screen. The toothed grooves are spirally arranged from top to bottom and are continuous and extend to the bottom. The filter element seat also has media flow channel grooves. The flow area of ​​the media flow channel grooves is not less than the effective flow diameter of the hydrogen inlet. The filter screen is formed by hydrogen-winding and connected to the filter element seat through the toothed grooves. The filtration accuracy of the filter screen is 50 μm, and the filtration accuracy of the second filter element 15 is 15 μm. The filtration accuracy of the second filter element 15 is equal to or better than the minimum allowable impurity particle size of the system. Simultaneously, the material of the second filter element 15 has good resistance to hydrogen embrittlement; the effective flow diameter of the second filter element 15 is not less than the minimum flow diameter of the hydrogen inlet.

[0048] The sealing element described in this utility model includes a fifth sealing ring 8 and a sealing retainer ring 9. A sealing groove is provided on the connector 12, and the fifth sealing ring 8 and the sealing retainer ring 9 are connected in the sealing groove.

[0049] In this utility model, a first sealing ring 1 is connected to the cavity of the valve body 2. The first sealing ring 1 is located at the front end of the first filter element 3. The first sealing ring 1 is an explosion-proof O-ring, the second sealing ring is a low-temperature O-ring, and the third sealing ring is an explosion-proof O-ring.

[0050] The first sealing ring 1 and the third sealing ring are made of high-molecular elastic rubber material, which is suitable for temperatures ranging from -40℃ to +85℃; they also have good hydrogen compatibility and explosion-proof properties.

[0051] in,

[0052] First sealing ring 1: An explosion-proof O-ring is used. This O-ring is located at the air inlet end of the valve body and is the first major component to come into contact with the hydrogen refueling nozzle during filling. Its core function is to prevent leakage of media in explosive environments through sealing performance, while maintaining structural stability under extreme conditions such as high pressure and corrosion, and avoiding safety hazards caused by seal failure.

[0053] Valve Body 2: This part is made of 316L austenitic stainless steel. The material of this part is customized within the standard requirements. The molding method of the material is specified to achieve high strength and hardness characteristics, so as to enhance the reliability of the connection between the product and the hydrogenation gun, reduce mechanical damage to the valve body, and increase the service life of the product.

[0054] First filter element 3: The first filter element is located at the front end of the valve disc inside the valve body. The material of the first filter element is copper alloy. A medium flow channel is opened on the conical surface of the filter element body. The outer conical surface of the filter element is covered with a filter screen made of hydrogen-coated wire, and its filtration accuracy can reach 50μm.

[0055] Second sealing ring 4: The second sealing ring is located at the seal between the filter element assembly and the valve body. This O-ring is a low-temperature O-ring, made of HNBR material, with a hardness of 90A.

[0056] Third sealing ring 5: The third sealing ring is located at the sealing point between the valve seat and the valve disc. This O-ring is an explosion-proof O-ring. The explosion-proof O-ring forms a sealing effect with the valve disc. The valve disc is a high-frequency moving part, so an explosion-proof O-ring is used.

[0057] Valve disc 6: Located between O-ring 3 and valve seat, this valve disc has a one-way sealing function to prevent medium backflow. It forms the main sealing surface with O-ring 3. The sealing surface of the valve disc is provided with a radius of 0.5. This design can make the valve disc and O-ring 3 seal better and less likely to damage O-ring 3, and extend service life.

[0058] First spring 7: This part is located between the valve disc and the spring seat. Its function is to allow the valve disc to rebound in the valve seat, thereby achieving a sealing effect with the O-ring 3.

[0059] Fifth sealing ring 8 and sealing retainer ring 9: A combined seal formed by an O-ring and a sealing retainer ring, located in the groove at the left end of the connector, which serves to seal the connector with the valve body.

[0060] Valve seat 10: The valve seat is located between the filter element assembly and the spring seat. The valve seat is made of 316L austenitic stainless steel, which can effectively prevent the valve seat from being deformed by the pressure of the filter element assembly and the spring seat.

[0061] Spring seat 11: The spring seat is located between the valve seat and the connector. Its main functions are: 1. To provide accurate guidance for the valve disc, effectively preventing positional displacement during movement and thus sealing failure. 2. To provide platform support for the first and second springs, facilitating spring installation and positioning.

[0062] Connector 12: Made of 316L austenitic stainless steel, the connector and valve body are threaded together to form a single unit. The left end of this part has a groove for placement into the combined seal. The right end of this part can be machined into various connector types, such as compression fittings, ferrule fittings, etc.

[0063] Locking nut 13: The locking nut is located on the external thread of the connector. Its function is to lock the hydrogen filling port to the panel and fix it.

[0064] Second spring 14: The second spring is located between the spring seat and the second filter element, and its function is to fix the filter element.

[0065] Second filter element 15: The second filter element is located between the bottom of the connector and the second spring. Its function is to perform secondary filtration, and the filtration accuracy is 15μm. The second filter element is a stainless steel powder sintered filter element.

[0066] Fourth sealing ring 16: The fourth sealing ring is located in the groove of the protective cap, and its function is to form a seal between the protective cap and the left end of the valve body.

[0067] Protective Cap 17: The protective cap is located at the left end of the valve body. It has an internal groove containing a fourth sealing ring, and a breather hole and a through hole at the top for the plastic-coated steel wire rope to pass through. Its function is to effectively prevent dust, water, and detachment, thus protecting the hydrogen filling port.

[0068] Aluminum buckle 18: Used to clamp and fix plastic-coated steel wire rope.

[0069] PVC-coated steel wire rope 19: Used to connect the protective cap and valve body, preventing loss if the protective cap and valve body detach. The steel wire rope has a certain strength and is not easily broken. The PVC coating on the outside of the steel wire rope provides a certain degree of protection, preventing scratches to operators and the hydrogen filling port.

[0070] This utility model design adds a secondary filter (second filter) inside the hydrogen filling port connector without affecting the original appearance and size of the product or the flow rate of the medium, thereby improving the cleanliness of the hydrogen before it enters the hydrogen supply system.

[0071] After the application of this invention, the filter in the hydrogen supply system downstream of the hydrogen refueling port can be eliminated. This can save space in the hydrogen supply system, as well as manufacturing and maintenance costs.

[0072] The valve disc of this invention has a rounded corner of R 0.5 on its sealing surface, which improves the sealing effect and service life of the valve disc.

[0073] The protective cap of this invention is equipped with a breather hole, which makes the cap easier to install. The breather hole also facilitates the detection of bubbles at the hydrogen filling port during maintenance and repair.

[0074] The working process of the valve body of this utility model has been disclosed in existing documents (CN213982986U) and will not be repeated here.

[0075] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0076] In the description of this application, it should be noted that the terms "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0077] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or vertical, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0078] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0079] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A hydrogenation port, comprising a valve body (2), characterized in that, It also includes, The first filter element (3) is connected to the air inlet end of the valve body (2) cavity, and a second sealing ring (4) is provided between the first filter element (3) and the inner wall of the valve body (2). Valve seat (10) is connected to the air outlet end of the valve body (2) cavity. One end of the valve seat (10) is in contact with the first filter element (3). A third sealing ring (5) is connected between the valve seat (10) and the first filter element (3) at the contact point. Spring seat (11), the spring seat (11) has a convex structure, the spring seat (11) is connected to the other end of the valve seat (10), the convex structure of the valve seat (10) extending into the valve seat (10) has a spring groove, and a first spring (7) is connected in the spring groove. The lower end of the valve disc (6) is movably connected in the spring groove by the first spring (7), and the upper end of the valve disc (6) is located between the valve seat (10) and the first filter element (3), and the upper end of the valve disc (6) forms a sealing structure with the third sealing ring (5) by the first spring (7). The connector (12) is connected to the air outlet end inside the valve body (2) cavity and fixes the valve seat (10) and spring seat (11) inside the valve body (2). A sealing element is connected between the connector (12) extending into the valve body (2) and the inner wall of the valve body (2). The second filter element (15) is connected to the cavity of the connector (12), and a second spring (14) is connected between the second filter element (15) and the spring seat (11). A locking nut (13) is used to lock the hydrogen filling port onto the panel, and the locking nut (13) is connected to the external thread of the connector (12).

2. A hydrogenation port according to claim 1, characterized in that: A protective cap (17) is connected to the inlet of the valve body (2). The protective cap (17) has a groove, and a fourth sealing ring (16) is connected in the groove to form a seal between the protective cap (17) and the valve body (2).

3. A hydrogenation port according to claim 2, characterized in that: The end of the protective cap (17) is provided with a breathing hole and a through hole connected to the breathing hole.

4. A hydrogenation port according to claim 3, characterized in that: A plastic-coated steel wire rope (19) is threaded through the through hole, and one end of the plastic-coated steel wire rope (19) is connected to the valve body (2).

5. A hydrogenation port according to claim 4, characterized in that: The plastic-coated steel wire rope (19) is connected to an aluminum buckle (18) for clamping and fixing the plastic-coated steel wire rope.

6. A hydrogenation port according to claim 1, characterized in that: The first filter element (3) includes a filter element seat and a filter screen that are separately set. The filter element seat has a conical structure. The conical filter element seat has a toothed groove for connecting and fixing the filter screen. The toothed groove is arranged in a spiral shape from top to bottom. The filter element seat has a media flow channel groove. The filter screen is formed by hydrogen unwinding and is connected to the filter element seat through the toothed groove. The filtration accuracy of the filter screen is 50μm. The filtration accuracy of the second filter element (15) is 15μm.

7. A hydrogenation port according to claim 1, characterized in that: The sealing element includes a fifth sealing ring (8) and a sealing retainer ring (9). A sealing groove is provided on the joint (12), and the fifth sealing ring (8) and the sealing retainer ring (9) are connected in the sealing groove.

8. A hydrogenation port according to claim 1, characterized in that: The valve body (2) has a first sealing ring (1) connected inside its cavity. The first sealing ring (1) is located at the front end of the first filter element (3). The first sealing ring (1) is an explosion-proof O-ring.

9. A hydrogenation port according to claim 1, characterized in that: The second sealing ring is a low-temperature O-ring, and the third sealing ring is an explosion-proof O-ring.

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