CN215862882U - Gas cylinder and fuel cell system with same - Google Patents

Abstract

The utility model belongs to the technical field of fuel cell equipment, and particularly relates to a gas cylinder and a fuel cell system with the gas cylinder. Wherein, the gas bomb includes: the bottle body is integrally formed and provided with at least one opening end, and the opening end is inwards recessed to form a connecting notch; the bottle valve seat comprises a valve body, a first protruding part and a second protruding part, the first protruding part and the second protruding part are respectively positioned on two opposite sides of the valve body, the first protruding part and the second protruding part respectively extend towards the direction far away from the valve body in a back-to-back mode, and the first protruding part, the valve body and the second protruding part are provided with through air passages; the first protruding part is inserted and fixed in the connecting notch, and a sealing ring sleeved on the first protruding part is assembled between the outer wall surface of the first protruding part and the wall surface of the connecting notch. By applying the technical scheme, the problems that the existing gas storage bottle adopts a welding process to assemble and prepare the bottle body and the pipeline, the preparation process is backward, the working strength of welding work is high, and the working environment is poor are solved.

Description

Gas cylinder and fuel cell system with same

Technical Field

The utility model belongs to the technical field of fuel cell equipment, and particularly relates to a gas storage cylinder and a fuel cell system with the gas storage cylinder.

Background

Currently, a single gas cylinder is used in a fuel cell system to store fuel gas. Generally, current gas bomb is made of metal material, generally uses steel to make, therefore, the bottle of current gas bomb generally includes body portion and head portion, and body portion is one end and seals the other end opening, welds after the head portion open end docks with the open end of body portion, then welds the pipeline on the head portion to set up the valve on the pipeline, just prepared a gas bomb.

Therefore, the existing gas storage bottle adopts a welding process to assemble and prepare the bottle body and the pipeline, the preparation process is backward, the working strength of welding work is high, and the working environment is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a gas storage bottle and a fuel cell system with the gas storage bottle, and aims to solve the problems that the existing gas storage bottle is provided with a bottle body and a pipeline which are assembled and prepared by adopting a welding process, the preparation process is backward, the working strength of welding work is high, and the working environment is poor.

In order to achieve the purpose, the utility model adopts the technical scheme that: a gas cylinder, comprising: the bottle body is integrally formed and provided with at least one opening end, and the opening end is inwards recessed to form a connecting notch; the bottle valve seat comprises a valve body, a first protruding part and a second protruding part, the first protruding part and the second protruding part are respectively positioned on two opposite sides of the valve body, the first protruding part and the second protruding part respectively extend towards the direction far away from the valve body in a back-to-back mode, and the first protruding part, the valve body and the second protruding part are provided with through air passages; the first protruding part is inserted and fixed in the connecting notch, and a sealing ring sleeved on the first protruding part is assembled between the outer wall surface of the first protruding part and the wall surface of the connecting notch.

Optionally, the outer wall of the first protrusion is provided with at least one annular groove, each annular groove is provided with at least one sealing ring, the circumferential outer wall surface of the first protrusion abuts against the circumferential wall surface of the connecting recess, the sealing ring can elastically deform, and the sealing ring is pressed by the groove bottom of the annular groove and the circumferential wall surface of the connecting recess to deform.

Optionally, a plurality of protrusions are arranged on the top of the open end, the protrusions are distributed at intervals around the connecting notch, a plurality of matching grooves corresponding to the protrusions in a one-to-one mode are formed in the wall surface, away from the second protruding portion, of the valve body, the protrusions are embedded into the matching grooves, and smooth transition is formed between the wall surface, away from the first protruding portion, of the valve body and the outer wall surface of the open end.

Optionally, the plurality of protrusions are uniformly distributed in the circumferential direction.

Alternatively, the radius of curvature R of the wall surface of the valve body away from the first projection is equal to the radius of curvature R of the outer wall surface of the open end.

Optionally, a sunken groove is formed in the open end, the connecting notch is formed in the middle of the sunken groove, the circumferential profile shape of the valve body is matched with that of the sunken groove, the valve body is embedded into the sunken groove, and the wall surface of the valve body, which is far away from the first protruding portion, and the outer wall surface of the open end are in smooth transition.

Optionally, the wall surface of the valve body facing the bottle body is attached to the bottom surface of the sink groove and provided with adhesive to form a seal.

Optionally, the bottle body is columnar, the two ends of the bottle body are both open ends, and the columnar bottle body consists of a straight cylinder body in the middle and the open ends at the two ends; the wall thickness H of the straight cylinder body is uniform, and the wall thickness H of the opening end is more than or equal to the wall thickness H of the straight cylinder body; or the wall thickness H of the opening end is greater than the wall thickness H of the straight cylinder bottle body, the wall thickness H of the opening end is gradually thickened from the straight cylinder bottle body to the opening end, and the wall thickness of the connecting position of the straight cylinder bottle body and the opening end is gradually thickened and transited from the straight cylinder bottle body to the opening end.

Optionally, the bottle body is made of plastic and integrally formed by one-time blow molding, and the outer diameter D of the straight cylinder body is more than or equal to 50mm and less than or equal to 240 mm.

According to another aspect of the present invention, a fuel cell system is provided. Specifically, the fuel cell system comprises the gas storage cylinder.

The utility model has at least the following beneficial effects:

the gas storage bottle provided by the utility model is formed by assembling an integrally formed bottle body and a bottle valve seat, an opening end is designed on the bottle body between the bottle valve seat and the bottle body, a connecting notch is formed in the opening end in a concave manner, correspondingly, the bottle valve seat is composed of a valve body, a first protruding part and a second protruding part, the first protruding part is inserted into the connecting notch, in addition, good sealing performance is realized between the first protruding part and the connecting notch through a sealing ring, and the sealing performance after the connection of the bottle valve seat and the bottle body is finished is ensured. Compared with the gas storage bottle prepared by the welding process in the prior art, the gas storage bottle provided by the utility model adopts the integrally formed bottle body, and the connection stability of the bottle valve seat and the bottle body is ensured and the sealing performance is ensured by designing the connection structure between the bottle valve seat and the connection notch of the bottle body.

Drawings

In order to more clearly illustrate the technical solution in the first embodiment of the present invention, the drawings needed to be used in the first embodiment or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of an assembly structure of a gas cylinder according to an embodiment of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a front view of a gas cylinder according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is an enlarged view at B in FIG. 4;

FIG. 6 is an enlarged view at C of FIG. 4;

FIG. 7 is a schematic diagram illustrating a first perspective structure of a cylinder valve seat of a gas cylinder according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a second perspective view of a cylinder valve seat of the cylinder according to one embodiment of the present invention;

FIG. 9 is a schematic view of an open end of a body of a gas cylinder according to an embodiment of the present invention;

FIG. 10 is a front view of a gas cylinder according to a second embodiment of the utility model;

FIG. 11 is a sectional view taken along the line A '-A' in FIG. 10;

fig. 12 is an enlarged view at B' in fig. 11.

Wherein, in the figures, the respective reference numerals:

10. a bottle body; 11. an open end; 12. a connecting notch; 13. a protrusion; 15. sinking a groove; 16. a straight cylinder body; 20. a bottle valve seat; 21. a valve body; 22. a first protrusion; 23. a second protrusion; 24. an airway; 25. a mating groove; 27. an annular groove; 30. and (4) a sealing ring.

Detailed Description

Reference will now be made in detail to the first embodiment of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Fig. 1 to 9 are schematic structural diagrams illustrating a first embodiment of the present invention; fig. 10 to 12 show schematic structural diagrams of a second embodiment of the present invention.

The first embodiment is as follows:

an embodiment of the present invention provides a gas cylinder, which is used for storing fuel gas, such as hydrogen gas, methane gas, ethanol gas, etc., and applying the gas cylinder filled with the fuel gas in a fuel cell system, so as to convert chemical energy into electric energy and supply power.

As shown in fig. 1 to 6, the gas cylinder includes a cylinder body 10 and a cylinder valve seat 20, and the cylinder body 10 and the cylinder valve seat 20 are assembled to form a complete gas cylinder capable of safely and stably storing fuel gas. During the specific design and assembly process, the bottle body 10 is integrally formed and has at least one open end 11, the open end 11 is recessed inwards to form a connecting notch 12, i.e. the bottle body 10 is turned inwards in the radial direction and is contracted to form a port (preferably, the caliber of the connecting notch 12 is gradually reduced from the open end 11 to the middle part of the bottle body 10); the bottle valve seat 20 includes a valve body 21, a first protrusion 22 and a second protrusion 23, the first protrusion 22 and the second protrusion 23 are respectively located on two opposite sides of the valve body 21, the first protrusion 22 and the second protrusion 23 form an integrated valve seat assembly, and the valve seat assembly is mounted and fixed on the open end 11, specifically, the first protrusion 22 and the second protrusion 23 extend back to the direction away from the valve body 21, and the first protrusion 22 is inserted and fixed in the connecting recess 12, so that after the bottle body 10 is filled with fuel gas, the high-pressure fuel gas can apply pressure to the inverted port to clamp the first protrusion 22, so that the first protrusion 22 is more stable in the connecting recess 12. And, the sealing ring 30 fitted over the first protrusion 22 is fitted between the outer wall surface of the first protrusion 22 and the wall surface of the coupling recess 12, and after the initial assembly is completed (at this time, there is no fuel gas in the cylinder), the sealing ring 30 is pre-tightened and pressed between the first protrusion 22 and the coupling recess 12 to be elastically deformed, thereby completely sealing the gap between the first protrusion 22 and the coupling recess 12, and, after the gas cylinder is filled with the fuel gas, the high pressure of the fuel gas acts on the inverted coupling recess 12 to further compress the seal ring 30, the elastic deformation amount of the sealing ring 30 is made larger, so that the gap between the first protrusion 22 and the coupling recess 12 is better sealed, but also enables the connecting recess 12 to further sandwich the first protrusion 22 under the high pressure of the fuel gas so that the cylinder valve seat 20 can be more stably fitted on the open end 11. The first protrusion 22, the valve body 21, and the second protrusion 23 are provided with a gas passage 24 that penetrates therethrough, and fuel gas is sent through the gas passage 24 (fuel gas is injected into the cylinder from an external gas storage device or fuel gas stored in the cylinder is output to the outside).

The gas storage bottle provided by the utility model is formed by assembling the bottle body 10 and the bottle valve seat 20 which are integrally formed, in addition, an opening end 11 is designed on the bottle body 10 between the bottle valve seat 20 and the bottle body 10, a connecting notch 12 is formed in the opening end 11, correspondingly, the bottle valve seat 20 is composed of a valve body 21, a first protruding part 22 and a second protruding part 23, the first protruding part 22 is inserted into the connecting notch 12, in addition, good sealing performance is realized between the first protruding part 22 and the connecting notch 12 through a sealing ring 30, and the sealing performance after the connection of the bottle valve seat 20 and the bottle body 10 is finished is ensured. Compared with the gas storage bottle prepared by the welding process in the prior art, the gas storage bottle provided by the utility model adopts the integrally formed bottle body 10, and the connection structure between the bottle valve seat 20 and the connection notch 12 of the bottle body 10 is designed, so that the stable connection between the bottle valve seat 20 and the bottle body 10 is ensured, meanwhile, the sealing performance is ensured, the process is more complete and simplified compared with the welding process, the working environment of workers is improved, and the production workers do not need to endure the high-temperature working environment of a welding workshop, so that the workshop humanization is realized.

In the gas cylinder of the first embodiment, the curvature radius R of the wall surface of the valve body 21 far away from the first protrusion 22 is equal to the curvature radius R of the outer wall surface of the opening end 11, as shown in fig. 5 and 6, so that the contour of the end of the assembled gas cylinder is smooth arc-shaped, the appearance is smooth, and the valve body 21 and the opening end 11 of the bottle body 10 are in even butt joint transition, so that the overall shape line of the gas cylinder is more beautiful and smooth.

Referring to fig. 1 to 7, at least one annular groove 27 is formed on the outer wall of the first protrusion 22, at least one sealing ring 30 is fitted in each annular groove 27, and the groove shape of the annular groove 27 is adapted to the contour shape of the sealing ring 30, so that the sealing ring 30 can be stably fitted over the first protrusion 22 and seated in the annular groove 27, and then the first protrusion 22 is inserted into the coupling recess 12. In the process of inserting the first protruding portion 22 into the connecting recess 12, since the seal ring 30 can be elastically deformed, the seal ring 30 is pressed by the groove bottom of the annular groove 27 and the wall surface of the connecting recess 12 to be deformed, and the deformed seal ring 30 not only fills the entire annular groove 27 but also circumferentially abuts against the wall surface of the connecting recess 12, thereby achieving a good sealing effect on the gap between the first protruding portion 22 and the connecting recess 12.

As shown in fig. 9, a sunken groove 15 is provided on the open end 11, the sunken groove 15 provides a space for accommodating the valve body 21, and the valve body 21 has a circumferential contour shape matched with that of the sunken groove 15, the valve body 21 is embedded in the sunken groove 15, that is, after the cylinder valve seat 20 is inserted into the open end 11, the valve body 21 is sunken in the sunken groove 15, and the wall surface of the valve body 21 far away from the first protrusion 22 and the outer wall surface of the open end 11 are in smooth transition, so that the end surface of the assembled gas cylinder presents an overall smooth surface, and the circumferential edge dimension of the valve body 21 and the circumferential edge dimension of the sunken groove 15 form a closed ring dimension chain, and the assembling precision is high. Wherein the coupling recess 12 is provided at the middle of the sinking groove 15, ensuring that the air pressure received at the end of the bottle body 10 is uniform at each position of the end.

In the design and assembly process of the gas cylinder in the first embodiment, the wall surface of the valve body 21 facing the cylinder body 10 is attached to the bottom surface of the sinking groove 15, that is, the surface of the valve body 21 is in surface contact with the bottom surface of the sinking groove 15, so that the sealing performance of the cylinder valve seat 20 and the cylinder body 10 after assembly is better. And, be equipped with the bonding glue between the tank bottom surface of valve body 21 towards the wall of bottle 10 and heavy groove 15, the bonding glue can be filled completely between the tank bottom surface of valve body 21 and heavy groove 15, and the solidification of bonding glue after the assembly is accomplished, then can further improve the leakproofness between the tank bottom surface of the surface of valve body 21 and heavy groove 15 to the assembly steadiness of valve body 21 embedding in heavy groove 15 has been improved. Further, the circumferential outer wall surface of the first projecting portion 22 abuts against the circumferential wall surface of the connecting recess 12, and an adhesive is also provided between the circumferential outer wall surface of the first projecting portion 22 and the circumferential wall surface of the connecting recess 12. At this time, the assembly gap between the opposite assembly surfaces of the bottle valve seat 20 and the opening end 11 of the bottle body 10 is completely filled by the adhesive glue, which improves the connection stability between the bottle valve seat 20 and the bottle body 10 and simultaneously ensures the sealing property between the bottle valve seat 20 and the bottle body 10.

As shown in fig. 1 to 4, the bottle body 10 is cylindrical, and preferably, the overall shape of the bottle body 10 is cylindrical (of course, in other possible embodiments, the bottle body 10 may also be prismatic, or spherical, etc.), so as to simplify the overall dimension parameters, reduce the difficulty of the manufacturing process, and facilitate the production. In the first embodiment, both ends of the bottle body 10 are open ends 11, that is, both ends of the bottle body 10 can be mounted with the bottle valve seats 20, so as to improve the applicability of the gas storage bottle provided by the present invention, for example: when a plurality of gas storage cylinders are required to be connected in series to form a gas storage cylinder module with large gas storage capacity, the gas storage cylinders with the two ends being the open ends 11 to be assembled with the cylinder valve seats 20 can be conveniently connected in series, and a connecting pipeline required between every two adjacent gas storage cylinders is short, so that the final occupied space of the formed gas storage cylinder module with large gas storage capacity is minimized; or, the gas storage cylinder with two open ends 11 is used, wherein the cylinder valve seat 20 assembled on one open end 11 is used for filling fuel gas into the gas storage cylinder, and the cylinder valve seat 20 assembled on the other open end 11 is used for outputting the fuel gas outwards, so that an inflation system matched with the gas storage cylinder and an output system matched with the gas storage cylinder are mutually independent, and the work is not interfered with each other.

As shown in fig. 5, the columnar bottle body 10 is composed of a middle straight bottle body 16 and open ends 11 at two ends, the wall thickness H of the straight bottle body 16 is uniform, and the wall thickness H of the open ends 11 is greater than or equal to the wall thickness H of the straight bottle body 16. Because the open end 11 needs to be assembled with the cylinder valve seat 20, a connecting structure for assembling the cylinder valve seat 20 is designed and reserved on the open end 11, which causes structural stress at two ends of the bottle body 10, and therefore, in order to ensure that the straight cylinder body 16 and the open ends 11 at two ends can stably and safely bear the pressure effect of high-pressure fuel gas, preferably, the wall thickness H of the open end 11 is greater than the wall thickness H of the straight cylinder body 16, the wall thickness H of the open end 11 is gradually increased from the straight cylinder body 16 to the open end 11, and the wall thickness of the joint position of the straight cylinder body 16 and the open end 11 is gradually increased from the straight cylinder body 16 to the open end 11.

In the first embodiment, the bottle body 10 is a plastic integrally formed bottle body, preferably, the bottle body 10 of the gas storage bottle provided by the present invention is blow molded by a blow molding process at one time, and the straight bottle body 16 and the opening end 11 do not need to be welded, so as to improve safety. The outer diameter D of the straight cylinder body 16 of the bottle body 10 is more than or equal to 50mm and less than or equal to 240 mm. Compared with the overall dimension of the gas storage bottle in the prior art, the gas storage bottle provided by the utility model realizes a miniaturized design, and the external diameter dimension of the gas storage bottle is far smaller than that of the gas storage bottle used in the prior art, so that the gas storage bottle is more beneficial to fully utilizing the space to install and place the gas storage bottle. For example, when the gas cylinder is applied to a fuel cell automobile, the assembly space of the automobile is limited, the effective space utilization rate of the gas cylinder assembled on the automobile in the prior art is reduced, and when the gas cylinder is assembled on the automobile, a plurality of gas cylinders can be more reasonably arranged due to the small outer diameter of the gas cylinder, and then the plurality of gas cylinders are connected in series. Therefore, the same assembly space is reserved in the automobile, and the gas storage cylinder module with larger gas storage capacity can be assembled by applying the gas storage cylinder provided by the utility model and greatly improving the utilization rate of the assembly space.

As shown in fig. 6, 8 and 9, a plurality of protrusions 13 are provided on the top of the open end 11, the plurality of protrusions 13 are spaced around the coupling recess 12, and the plurality of protrusions 13 are uniformly distributed in the circumferential direction. A plurality of engagement grooves 25 corresponding one-to-one to the plurality of protrusions 13 are provided on a wall surface of the valve body 21 away from the second protrusion 23. The protrusion 13 is inserted into the fitting groove 25 during the insertion of the bottle valve seat 20 into the coupling recess 12 of the open end 11. Through the one-to-one gomphosis assembly of a plurality of archs 13 and cooperation groove 25, not only realized between bottle valve seat 20 and the open end 11 the positioning, moreover, after bottle valve seat 20 assembly is accomplished on open end 11, in circumference, because protruding 13 has formed rotation interference with cooperation groove 25, no matter carry out fibre to the gas bomb and spread the layer in-process or in the in-process of actually using, can both prevent that relative rotation from appearing in bottle valve seat 20 for bottle 10, keep being connected stably between bottle valve seat 20 and the bottle 10. Also, the plurality of protrusions 13 are inserted into the fitting grooves 25, having a coupling force between the bottle valve seat 20 and the bottle body 10, so that the bottle valve seat 20 can be more stably coupled to the open end 11.

Example two:

the gas cylinder of the second embodiment has the following differences compared to the gas cylinder of the first embodiment.

As shown in fig. 10 to 12, the curvature radius R of the wall surface of the valve body 21 far away from the first protrusion 22 is greater than the curvature radius R of the outer wall surface of the opening end 11, so that the end contour of the assembled gas cylinder is smooth and circular arc-shaped, and the appearance is smooth, so that the overall height of the gas cylinder along the axis direction of the gas cylinder is reduced, and thus when the gas cylinder is installed in the assembling space, for example, the gas cylinder is longitudinally assembled (namely, the axis of the gas cylinder is vertically placed), and at the moment, the gap between the opening end 11 of the gas cylinder and the top inner wall of the assembling space is smaller, so that the assembling space is more reasonably adapted, and the space utilization rate is improved.

Compared with the gas cylinder of the first embodiment, the gas cylinder of the second embodiment has the same structure except for the difference, and thus the description thereof is omitted.

According to another aspect of the present invention, a fuel cell system (not shown) is provided. Specifically, the fuel cell system comprises the gas storage cylinder.

The gas cylinder provided by the utility model is applied to a fuel cell system, wherein the gas cylinder is formed by assembling an integrally formed bottle body 10 and a bottle valve seat 20, an open end 11 is designed on the bottle body 10 between the bottle valve seat 20 and the bottle body 10, and a connecting notch 12 is formed in the open end 11, correspondingly, the bottle valve seat 20 is formed by a valve body 21, a first protruding part 22 and a second protruding part 23, the first protruding part 22 is inserted into the connecting notch 12, and good sealing performance is realized between the first protruding part 22 and the connecting notch 12 through a sealing ring 30, so that the sealing performance after the connection between the bottle valve seat 20 and the bottle body 10 is finished is ensured. Compared with the gas storage bottle prepared by the welding process in the prior art, the gas storage bottle provided by the utility model adopts the integrally formed bottle body 10, and the connection structure between the bottle valve seat 20 and the connection notch 12 of the bottle body 10 is designed, so that the stable connection between the bottle valve seat 20 and the bottle body 10 is ensured, and meanwhile, the sealing performance is ensured. In addition, the gas storage bottle provided by the utility model realizes a miniaturized design, and the outer diameter of the gas storage bottle is far smaller than that of the gas storage bottle used in the prior art, so that the gas storage bottle is more beneficial to fully utilizing the space for installing and placing the gas storage bottle. For example, when the gas cylinder is applied to a fuel cell automobile, the assembly space of the automobile is limited, the effective space utilization rate of the gas cylinder assembled on the automobile in the prior art is reduced, and when the gas cylinder is assembled on the automobile, a plurality of gas cylinders can be more reasonably arranged due to the small outer diameter of the gas cylinder, and then the plurality of gas cylinders are connected in series. Therefore, the same assembly space is reserved in the automobile, the utilization rate of the assembly space can be greatly improved by applying the gas storage cylinder provided by the utility model, and a gas storage cylinder module with larger gas storage capacity is assembled, so that a fuel cell system which is more compact and has high space utilization rate is assembled.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A gas cylinder, comprising:

the bottle body (10), the bottle body (10) is integrally formed and has at least one opening end (11), and the opening end (11) is inwards concave to form a connecting notch (12);

the bottle valve seat (20) comprises a valve body (21), a first protruding portion (22) and a second protruding portion (23), the first protruding portion (22) and the second protruding portion (23) are respectively located on two opposite sides of the valve body (21), the first protruding portion (22) and the second protruding portion (23) respectively extend back to the direction away from the valve body (21), and the first protruding portion (22), the valve body (21) and the second protruding portion (23) are provided with a through air channel (24);

wherein the first protruding part (22) is inserted and fixed in the connecting notch (12), and a sealing ring (30) sleeved on the first protruding part (22) is assembled between the outer wall surface of the first protruding part (22) and the wall surface of the connecting notch (12).

2. The gas cylinder as set forth in claim 1,

the outer wall of the first protruding portion (22) is provided with at least one annular groove (27), each annular groove (27) is provided with at least one sealing ring (30), the circumferential outer wall surface of the first protruding portion (22) is abutted to the circumferential wall surface of the connecting notch (12), the sealing ring (30) can be elastically deformed, and the sealing ring (30) is extruded by the groove bottom of the annular groove (27) and the circumferential wall surface of the connecting notch (12) to deform.

3. A gas cylinder according to claim 2,

be equipped with a plurality of archs (13) on the top of open end (11), a plurality of archs (13) center on connect notch (12) interval distribution, valve body (21) are kept away from be equipped with on the wall of second protruding portion (23) with a plurality of cooperation grooves (25) of a plurality of archs (13) one-to-one, arch (13) embedding in cooperation groove (25), and, valve body (21) are kept away from the wall of first protruding portion (22) with smooth transition between the outer wall of open end (11).

4. A gas cylinder according to claim 3,

the plurality of bulges (13) are uniformly distributed in the circumferential direction.

5. The gas cylinder as set forth in claim 1,

the radius of curvature R of the wall surface of the valve body (21) remote from the first projection (22) is equal to the radius of curvature R of the outer wall surface of the open end (11).

6. The gas cylinder as set forth in claim 1,

be equipped with on open end (11) and sink groove (15), connect notch (12) and set up the middle part of sinking groove (15), valve body (21) circumference profile shape with sink groove (15) looks adaptation, valve body (21) embedding sink in groove (15), and, valve body (21) are kept away from the wall of first protruding portion (22) with smooth transition between the outer wall of open end (11).

7. A gas cylinder according to claim 6,

the wall surface of the valve body (21) facing the bottle body (10) is attached to the bottom surface of the sinking groove (15) and is provided with adhesive glue to form sealing.

8. A gas cylinder according to any one of claims 1 to 7,

the bottle body (10) is columnar, the two ends of the bottle body (10) are both the open ends (11), and the columnar bottle body (10) consists of a straight-tube body (16) in the middle and the open ends (11) at the two ends;

the wall thickness H of the straight cylinder bottle body (16) is uniform, and the wall thickness H of the opening end (11) is more than or equal to the wall thickness H of the straight cylinder bottle body (16); or the wall thickness H of the opening end (11) is greater than the wall thickness H of the straight cylinder body (16), the wall thickness H of the opening end (11) is gradually thickened from the straight cylinder body (16) to the direction of the opening end (11), and the wall thickness of the connecting position of the straight cylinder body (16) and the opening end (11) is gradually thickened from the straight cylinder body (16) to the direction of the opening end (11).

9. A gas cylinder according to claim 8,

the bottle body (10) is made of plastic materials and integrally formed by one-time blow molding, and the outer diameter D of the straight-cylinder bottle body (16) is not less than 50mm and not more than 240 mm.

10. A fuel cell system, characterized in that,

the fuel cell system comprising a gas cylinder according to any one of claims 1 to 9.

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