Metal valve seat sealing structure and hydrogen cylinder

Abstract

The utility model discloses a metal valve seat sealing structure and a hydrogen cylinder. The metal valve seat sealing structure comprises a valve seat, a clamping part, a center plate, a rotation stopping hole, a rotation stopping groove and an inner container sealing head. The valve seat comprises a clamping part and a center plate connected with the clamping part; a rotation stopping hole and a rotation stopping groove are formed in the center plate in the axis direction of the valve seat, the inner container sealing head wraps the outer side of the center plate in an interlayer mode, and the rotation stopping hole and the rotation stopping groove are filled with the inner container sealing head. Due to the fact that the center plate is provided with the rotation stopping hole and the rotation stopping groove, when the inner container end socket and the valve seat are integrally formed, the inner container end socket can be filled in the rotation stopping hole and the rotation stopping groove, stability after installation can be effectively improved, the probability that the valve seat and the inner container end socket rotate is reduced, sealing performance is improved, and safety of the hydrogen cylinder in use is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing, in particular to a metal-to-metal valve seat sealing structure and a hydrogen bottle. Background Art

[0002] With the rapid development and industrialization of hydrogen fuel cells and electric vehicles, Type IV hydrogen storage cylinders are becoming a global research hotspot due to their light weight and fatigue resistance. How to design and manufacture lightweight, high-pressure, high hydrogen storage mass ratio and long-life on-board hydrogen storage cylinders has become the key to the use of hydrogen energy. At present, Type IV cylinders are becoming an important carrier for hydrogen storage in the future due to their light weight, fatigue resistance and high hydrogen storage density.

[0003] Due to the limitations of the structural development and design of the plastic liner, the sealing structure of the high connection strength "leak-proof, anti-rotation, and anti-peeling" metal valve seat and the plastic liner head is still a major difficulty in the design of the hydrogen storage bottle liner.

[0004] The existing technology usually adopts interference fit, labyrinth seal, threaded seal and the like to solve the sealing problem between the metal valve seat and the inner liner. However, there is still no anti-rotation structure between the metal valve seat and the plastic inner liner or the anti-rotation structure is too simple, which cannot meet the radial and axial connection stability between the metal valve seat and the plastic inner liner of the Type IV hydrogen storage bottle. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art or related technology.

[0006] In order to solve the above problems, the present application provides a first aspect of a metal valve seat sealing structure, comprising: a valve seat, a clamping portion, a web, a stop hole, a stop groove and an inner liner head;

[0007] The valve seat comprises a clamping portion and a web connected to the clamping portion;

[0008] The web plate is provided with a stop hole and a stop groove along the axial direction of the valve seat, the inner liner head is wrapped around the outer side of the web plate in a sandwich manner, and the inner liner head is filled in the stop hole and the stop groove.

[0009] Optionally, the anti-rotation holes are distributed on the web in a circular shape with the valve seat axis as the center.

[0010] Optionally, the anti-rotation grooves are provided on the lower end surface of the web and are distributed in a concentric circle pattern.

[0011] Optionally, the anti-rotation groove is an annular groove structure or an intermittent arc groove.

[0012] Optionally, it also includes a limiting groove, which is opened on the upper end surface of the web, and the inner liner head is filled in the limiting groove.

[0013] Optionally, a bottle mouth is opened at the upper end of the center of the valve seat to facilitate connection with the bottle valve in an internal threaded manner, and a sealing groove is opened on the web and at the lower end inside the bottle mouth, and the inner liner head is filled in the sealing groove.

[0014] Optionally, an adhesive layer is provided on the outer wall surface of the valve seat.

[0015] Optionally, the web is a conical structure, the top of which is connected to the clamping portion, and the bottom of which is located in the inner liner head, and the outer periphery of the bottom of the web is a rounded structure.

[0016] Optionally, the clamping portion is a polygonal structure.

[0017] The second aspect of the present application provides a hydrogen cylinder, comprising: a cylinder body and a metal valve seat sealing structure as any one of the technical solutions in the first aspect of the present application;

[0018] The metal valve seat sealing structure is arranged on the bottle body.

[0019] Beneficial Effects

[0020] A metal valve seat sealing structure provided in the embodiment of the utility model is provided with a stop hole and a stop groove on the width plate. When the inner liner head and the valve seat are integrally formed, the inner liner head can be filled into the stop hole and the stop groove, which can effectively improve the stability after installation, reduce the probability of rotation between the valve seat and the inner liner head and the sealing performance, and improve the safety of the hydrogen cylinder during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional structural diagram of the metal valve seat sealing structure of the utility model;

[0022] Figure 2 The utility model is a metal valve seat sealing structure Figure 1 Partially enlarged structural diagram;

[0023] Figure 3 This is a valve seat structure diagram of the metal valve seat sealing structure of the utility model;

[0024] Figure 4 This is a three-dimensional structural diagram of the metal valve seat sealing structure of the utility model;

[0025] Figure 5 This is a structural diagram of the bottom plate of the metal valve seat sealing structure of the utility model.

[0026] [Description of Reference Numerals]

[0027] 1. Valve seat; 2. Clamping part; 3. Width plate; 4. Stop hole; 5. Stop groove; 6. Inner liner head; 7. Limit groove; 8. Sealing groove. DETAILED DESCRIPTION

[0028] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0029] See also Figure 1-5 As shown, according to the first aspect of the present application, a metal valve seat sealing structure is provided, comprising: a valve seat 1, a clamping portion 2, a web 3, a rotation-stopping hole 4, a rotation-stopping groove 5 and an inner liner head 6;

[0030] The valve seat 1 includes a clamping portion 2 and a web 3 connected to the clamping portion 2;

[0031] The web plate 3 is provided with a stop hole 4 and a stop groove 5 along the axial direction of the valve seat 1 , and the inner liner head 6 is wrapped around the outer side of the web plate 3 in a sandwich manner, and the inner liner head 6 is filled in the stop hole 4 and the stop groove 5 .

[0032] Specifically, the metal valve seat 1 is a BOSS structure made of aluminum alloy or 316L stainless steel. The metal valve seat 1 includes a clamping portion 2 and a web 3. The liner head 6 is made of plastic material. Its appearance and wall thickness are designed according to the design requirements of the plastic liner of the hydrogen storage bottle. As a part of the liner of the Type IV hydrogen storage bottle, it mainly plays a gas barrier role. The axis of the valve seat 1 coincides with the axis of the liner head 6. The valve seat 1 is installed in the mold before molding and is integrally molded with the plastic liner head 6, so that the web 3 can be embedded in the liner head 6. The edge of the web 3 and the liner head 6 are in a wrapped sandwich structure, and the liner head 6 can be wrapped on the outside of the web 3. When the liner head 6 is molded and cooled, due to the large shrinkage rate of the plastic, the plastic can tightly wrap the edge of the web 3 to prevent the problem of metal valve seat 1 and plastic liner head 6 peeling off during carbon fiber winding or operation. In addition, the liner head 6 can be filled into the stop hole 4 and the stop groove 5. The stop hole 4 and the stop groove 5 are both opened along the axial direction of the valve seat 1, which can achieve sealing and ensure the stability of the installation between the valve seat 1 and the liner head 6, reduce the probability of rotation during use, and achieve the goals of low leakage, high stability, and protection of the BOSS structure of the metal valve seat 1.

[0033] Among them, the inner liner head 6 can be formed by injection molding, blow molding, and rotational molding.

[0034] Among them, the valve seat 1 molding method is to cast and forge the metal BOSS structure according to the designed shape, and then form the target structure by machining. The finished metal BOSS structure is placed in the injection mold as an insert, and finally formed in the mold cavity by melt molding to obtain the metal head sealing structure of the type IV hydrogen cylinder.

[0035] The anti-rotation holes 4 are distributed on the web 3 in a circular shape with the axis of the valve seat 1 as the center.

[0036] Specifically, the number of the stop holes 4 is at least 6, which are opened on the width plate 3 in a single circle or multiple circles with the axis of the valve seat 1 as the center. The diameter of the stop hole 4 is designed according to the use requirements, and the contact between the stop hole 4 and the inner liner head 6 adopts a rounded structure to reduce the probability of peeling between the metal valve seat 1 and the plastic inner liner; by opening the stop hole 4, the inner liner head 6 and the valve seat 1 are integrally formed, and the inner liner head 6 can be filled into the stop hole 4, which can prevent the inner liner head 6 and the valve seat 1 from rotating relative to each other due to torque generated by reasons such as car turning during use of the hydrogen storage bottle, thereby ensuring safety of use.

[0037] The anti-rotation grooves 5 are provided on the lower end surface of the web 3 and are distributed in a concentric circle pattern.

[0038] The anti-rotation groove 5 is an annular groove structure or an intermittent arc groove.

[0039] Specifically, the lower end surface of the web 3 is provided with anti-rotation grooves 5 distributed in a concentric circle pattern, and the number of anti-rotation grooves 5 can be multiple groups. When the anti-rotation grooves 5 are intermittent arc grooves, after the inner liner head 6 and the valve seat 1 are integrally formed, the inner liner head 6 can be filled into the anti-rotation grooves 5, which can prevent the inner liner head 6 and the valve seat 1 from rotating relative to each other during use, thereby ensuring safety in use. When the anti-rotation grooves 5 are annular grooves, a passage can be formed between two adjacent anti-rotation grooves 5, and after the inner liner head 6 and the valve seat 1 are integrally formed, the inner liner head 6 can be filled into the anti-rotation grooves 5 and the passage between the adjacent anti-rotation grooves 5, which can prevent the inner liner head 6 and the valve seat 1 from rotating relative to each other during use, thereby ensuring safety in use.

[0040] Among them, the diameter, groove width, groove length and rotation angle parameters of the anti-rotation groove 5 can be set according to actual use requirements.

[0041] It also includes a limiting groove 7 , which is opened on the upper end surface of the web 3 , and the liner head 6 is filled in the limiting groove 7 .

[0042] Specifically, the limiting groove 7 is opened on the upper end surface of the web 3. When the inner liner head 6 wraps the web 3, the limiting groove 7 can be filled, and the connected inner liner head 6 and the web 3 can be axially limited to improve the stability after installation.

[0043] The limiting groove 7 may be an annular groove.

[0044] A bottle mouth is opened at the upper end of the center of the valve seat 1 to facilitate connection with the bottle valve in an internal threaded manner. A sealing groove 8 is opened on the web 3 and located at the lower end inside the bottle mouth, and the inner liner head 6 is filled in the sealing groove 8.

[0045] Specifically, a bottle mouth with an internal thread is provided at the center of the valve seat 1, and the bottle valve is connected to the bottle mouth by means of threads. A sealing groove 8 with an annular structure is provided in the bottle mouth of the web 3. When the inner liner head 6 and the valve seat 1 are integrally formed, the inner liner head 6 can fill the sealing groove 8 to achieve a counterweight seal. At the same time, after the inner liner head 6 fills the sealing groove 8, it can fully contact the sealing groove 8 and maintain a high sealing effect. At the same time, this structure allows the hydrogen storage bottle to protect the metal web 3 through the plastic inner liner head 6 during use to prevent hydrogen embrittlement.

[0046] An adhesive layer is arranged on the outer wall surface of the valve seat 1 .

[0047] Specifically, an adhesive layer is provided on the outer surface of the valve seat 1. The adhesive layer is a layer structure formed after silanization treatment. The surface of the valve seat 1 is silanized to facilitate the subsequent improvement of the bonding strength with the inner liner head 6 of the plastic material and the improvement of the stability performance after connection.

[0048] The surface of the valve seat 1 is subjected to silanization treatment before injection molding to improve the bonding strength between the valve seat 1 and the plastic liner head 6 .

[0049] The web plate 3 is a cone structure, the top of which is connected to the clamping portion 2, and the bottom of which is located in the liner head 6. The outer periphery of the bottom of the web plate 3 is a rounded structure.

[0050] Specifically, the web 3 is a conical structure, whose axis is the same as the axis of the liner head 6, the clamping part 2 is installed on the top of the web 3, and its bottom is located inside the liner head 6. The outer circumference of the bottom surface adopts a rounded structure to prevent stress concentration and reduce the probability of peeling between the valve seat 1 and the plastic liner head 6.

[0051] The clamping portion 2 is a polygonal structure.

[0052] Specifically, the clamping portion 2 is a polygonal structure, specifically a hexagonal structure, which is convenient for staff to clamp and take.

[0053] A second aspect of the present application provides a hydrogen bottle, comprising: a bottle body and a metal valve seat sealing structure as in any of the above embodiments;

[0054] The metal valve seat sealing structure is arranged on the bottle body.

[0055] The hydrogen cylinder provided according to the embodiments of the present application comprises a bottle body and a metal valve seat sealing structure as in any of the above embodiments, the metal valve seat sealing structure being arranged on the body, and the bottle body being used to store hydrogen. Since the hydrogen cylinder comprises the metal valve seat sealing structure, it has all the beneficial effects of the metal valve seat sealing structure as in any of the above embodiments, which will not be elaborated herein.

[0056] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present utility model, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0059] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0060] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A metal valve seat sealing structure, characterized in that: include: A valve seat (1), a clamping portion (2), a web (3), a rotation-stopping hole (4), a rotation-stopping groove (5) and an inner liner sealing head (6); The valve seat (1) comprises a clamping portion (2) and a web (3) connected to the clamping portion (2); The web plate (3) is provided with a stop hole (4) and a stop groove (5) along the axial direction of the valve seat (1); the inner liner head (6) is wrapped in a sandwich manner on the outer side of the web plate (3); and the inner liner head (6) is filled in the stop hole (4) and the stop groove (5).

2. The metal valve seat sealing structure according to claim 1, characterized in that: The anti-rotation holes (4) are distributed on the web (3) in a circular shape with the axis of the valve seat (1) as the center.

3. The metal valve seat sealing structure according to claim 2, characterized in that: The anti-rotation grooves (5) are arranged on the lower end surface of the web (3) and are distributed in a concentric circle pattern.

4. The metal valve seat sealing structure according to claim 3, characterized in that: The anti-rotation groove (5) is an annular groove structure or an intermittent circular arc groove.

5. The metal valve seat sealing structure according to claim 4, characterized in that: It also comprises a limiting groove (7), wherein the limiting groove (7) is arranged on the upper end surface of the web (3), and the liner sealing head (6) is filled in the limiting groove (7).

6. The metal valve seat sealing structure according to claim 5, characterized in that: The valve seat (1) is provided with a bottle mouth at the center upper end, so as to be connected to the bottle valve by means of internal threads; a sealing groove (8) is provided on the web (3) and located at the lower end inside the bottle mouth, and the liner sealing head (6) is filled in the sealing groove (8).

7. The metal valve seat sealing structure according to claim 6, characterized in that: An adhesive layer is provided on the outer wall surface of the valve seat (1).

8. The metal valve seat sealing structure according to claim 7, characterized in that: The web (3) is a cone structure, the top of which is connected to the clamping portion (2), and the bottom of which is located inside the liner head (6), and the outer periphery of the bottom of the web (3) is a rounded structure.

9. The metal valve seat sealing structure according to claim 8, characterized in that: The clamping portion (2) is a polygonal structure.

10. A hydrogen cylinder, characterized in that: include: A bottle body and a metal valve seat sealing structure as claimed in any one of claims 1 to 9; The metal valve seat sealing structure is arranged on the bottle body.

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