CN215862847U - 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 storage cylinder and a fuel cell system with the gas storage cylinder. Wherein, the gas bomb includes: the bottle body is integrally formed and provided with an 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, and the first protruding part and the second protruding part extend back to back in the direction away from the valve body respectively; the first protruding part is inserted and fixed in the connecting notch, the outer wall of the first protruding part is provided with at least one annular groove, the wall surface of the connecting notch facing the first protruding part is provided with an annular protrusion matched with the annular groove, the annular protrusion is embedded in the annular groove in a matching mode, and the annular protrusion and the annular groove are abutted to form sealing. 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, the outer wall of the first protruding part is provided with at least one annular groove, the wall surface of the connecting notch facing the first protruding part is provided with an annular protrusion matched with the annular groove, the annular protrusion is embedded in the annular groove in a matching mode, and the annular protrusion and the annular groove are abutted to form sealing.

Optionally, the number of the annular grooves is multiple, the annular grooves are distributed at intervals along the axial direction of the first protruding portion, the annular protrusions correspond to the annular grooves one to one, and each annular protrusion is respectively embedded with the corresponding annular groove to form a seal.

Optionally, be equipped with a plurality of archs on the top of open end, a plurality of archs are around connecting notch interval distribution, be equipped with protruding section between two adjacent archs, the both ends of protruding section link to each other with two archs respectively, the valve body is kept away from and is equipped with a plurality of cooperation grooves with a plurality of protruding one-to-one on the wall of second protruding portion, it has the cooperation ditch to open between two adjacent cooperation grooves, the both ends in cooperation ditch communicate two cooperation grooves respectively, protruding embedding cooperation inslot, in the protruding section embedding cooperation ditch.

Optionally, be equipped with heavy groove on the open end, connect the notch setting at the middle part of heavy groove, a plurality of archs all set up on the groove diapire of heavy groove with a plurality of protruding sections, valve body circumference profile shape and heavy groove looks adaptation, during the valve body embedding heavy groove, the wall of valve body orientation bottle is laminated with the tank bottom surface of heavy groove mutually to, smooth transition between the wall of first protruding portion and the outer wall of open end is kept away from to the valve body.

Optionally, an adhesive is disposed between the wall surface of the valve body facing the bottle body and the bottom surface of the sink groove.

Alternatively, the radius of curvature R of the wall surface of the valve body remote from the first projection is larger than the radius of curvature R of the outer wall surface of the open end.

Optionally, the bottle is the column, and the both ends of bottle are the open end, and the columnar bottle comprises the straight section of thick bamboo body in the middle and the open end at both ends, and the wall thickness H of straight section of thick bamboo body is even unanimous, and the wall thickness H of open end is more than or equal to the wall thickness H of straight section of thick bamboo body.

Optionally, the bottle is the column, and the both ends of bottle are the open end, and the columnar bottle comprises the straight section of thick bamboo body in the middle and the open end at both ends, and the wall thickness H of open end is greater than the wall thickness H of straight section of thick bamboo body, and the wall thickness H of open end is by the direction of straight section of thick bamboo body to the open end thickening gradually to, the wall thickness of the position of meeting of straight section of thick bamboo body and open end is by the direction thickening transition gradually of straight section of thick bamboo body to the open 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 mode, correspondingly, the bottle valve seat is composed of a valve body, a first protruding portion and a second protruding portion, the first protruding portion is inserted into the connecting notch, a ring protrusion arranged on the wall surface of the connecting notch facing the first protruding portion is embedded and assembled with an annular groove arranged on the outer wall of the first protruding portion, sealing is formed between the ring protrusion and the annular groove, namely good sealing performance is achieved between the first protruding portion and the connecting notch, and the sealing performance after the bottle valve seat and the bottle body are connected is guaranteed. 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 sealing performance is ensured while the stable connection between the bottle valve seat and the bottle body is ensured by designing the connecting structure which is formed by the annular groove and the annular convex sealing embedding assembly between the first protruding part of the bottle valve seat and the connecting notch of the bottle body, the process is more complete and simpler 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 humanization of the workshop is realized.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic view of an assembly structure of a gas cylinder according to a first 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 a first 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 a schematic view of a first perspective structure of a cylinder valve seat of a gas cylinder according to a first embodiment of the present invention;

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

FIG. 8 is a schematic view of the open end of the body of the gas cylinder according to the first embodiment of the present invention;

fig. 9 is a cross-sectional view of the gas cylinder according to the second embodiment of the present invention after the cylinder valve seat and the cylinder body are assembled.

Wherein, in the figures, the respective reference numerals:

10. a bottle body; 11. an open end; 12. a connecting notch; 121. the ring is convex; 13. a protrusion; 14. a convex section; 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; 26. a fitting groove; 27. an annular groove.

Detailed Description

Reference will now be made in detail to embodiments 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 illustrative 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 8 are schematic structural views of the gas cylinder according to the first embodiment; fig. 9 is a cross-sectional view of the gas cylinder of the second embodiment after the cylinder valve seat and the cylinder body are assembled.

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 outer wall surface of the first protrusion 22 is opened with at least one annular groove 27, correspondingly, the wall surface of the connecting recess 12 facing the first protrusion 22 is provided with an annular protrusion 121 matching with the annular groove 27, and the first protrusion 22 is inserted into the connecting recess 12, so that the annular protrusion 121 is embedded in the annular groove 27 to form a seal. After the initial assembly is completed (when there is no fuel gas in the gas cylinder), the annular protrusion 121 is fitted into the annular groove 27 to form a seal, so as to completely seal the gap between the first protrusion 22 and the connecting recess 12, after the gas cylinder is filled with fuel gas, the high pressure of the fuel gas acts on the inverted connecting recess 12 to tightly fit the annular protrusion 121 into the annular groove 27, so that the gap between the first protrusion 22 and the connecting recess 12 is better sealed, and the connecting recess 12 can further clamp and press 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 an integrally formed bottle body 10 and a bottle valve seat 20, 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 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, in addition, a ring protrusion 121 arranged on the wall surface of the connecting notch 12 facing the first protruding part 22 is embedded and assembled with a ring groove 27 arranged on the outer wall of the first protruding part 22, a seal is formed between the ring protrusion 121 and the ring groove 27, namely, good sealing performance is realized between the first protruding part 22 and the connecting notch 12, and the sealing performance after the bottle valve seat 20 is connected with the bottle body 10 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 sealing performance is ensured while the stable connection between the bottle valve seat 20 and the bottle body 10 is ensured by designing the connecting structure which is formed by the sealing, embedding and assembling of the annular groove 27 and the annular protrusion 121 between the first protruding part 22 of the bottle valve seat 20 and the connecting notch 12 of the bottle body 10.

As shown in fig. 5, the curvature radius R of the wall surface of the valve body 21 away from the first protrusion 22 is equal to the curvature radius R of the outer wall surface of the opening end 11, so that the contour of the end of the assembled gas cylinder is smooth arc-shaped, 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 and line type of the gas cylinder are more beautiful and smooth.

As shown in fig. 6, the number of the annular grooves 27 is plural, the plural annular grooves 27 are distributed at intervals along the axial direction of the first protruding portion 22, and the annular protrusions 121 correspond to the plural annular grooves 27 one by one. In the first embodiment, after the first protruding portion 22 is inserted into the connecting recess 12 and the plurality of annular protrusions 121 are fitted in the plurality of annular grooves 27 in a one-to-one correspondence, each annular protrusion 121 is fitted in the corresponding annular groove 27 to form a seal, that is, a set of sealing structures is formed between each annular protrusion 121 and a corresponding one of the annular grooves 27, and a labyrinth sealing structure is formed between multiple sets of sealing structures, so that the sealing effect between the first protruding portion 22 and the connecting recess 12 is better. Moreover, the plurality of annular protrusions 121 are respectively fitted into the plurality of annular grooves 27 one by one, so that the connection between the first protruding portion 22 and the connection recess 12 is more stable.

As shown in fig. 8, a sunken groove 15 is formed on the open end 11, the sunken groove 15 provides a space for accommodating the valve body 21, the peripheral contour shape of the valve body 21 is matched with that of the sunken groove 15, the valve body 21 is embedded in the sunken groove 15, namely, 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, the peripheral edge dimension of the valve body 21 and the peripheral 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 according to 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, a circumferential top wall of the annular protrusion 121 abuts against a circumferential bottom wall of the connecting recess 12, and an adhesive is also provided between the circumferential top wall of the annular protrusion 121 and the circumferential bottom wall 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. 7 and 8, 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. Moreover, a convex section 14 is arranged between two adjacent convex sections 13. The plurality of protrusions 13 are distributed around the coupling recess 12, and both ends of the protruding section 14 are respectively connected to the two protrusions 13, that is, the plurality of protrusions 13 and the plurality of protruding sections 14 are connected to form a closed ring shape. The wall surface of the valve body 21 far away from the second protruding part 23 is provided with a plurality of matching grooves 25 corresponding to the plurality of protrusions 13 one to one, a matching groove 26 is formed between two adjacent matching grooves 25, and two ends of the matching groove 26 are respectively communicated with the two matching grooves 25. During insertion of the bottle valve seat 20 into the coupling recess 12 of the open end 11, the protrusion 13 is inserted into the fitting groove 25, and the protrusion section 14 is inserted into the fitting groove 26. 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. And, the plurality of closed ring-shaped protrusions 13 and the plurality of sections of protrusions 14 are simultaneously inserted into the matching grooves 25 and the matching grooves 26, so that a ring of annular seal is formed between the first protrusion 22 and the connecting notch 12, thus a first-stage seal is formed between the annular groove 27 of the first protrusion 22 and the annular protrusion 121 of the connecting notch 12, and a second-stage seal is formed after the plurality of closed ring-shaped protrusions 13 and the plurality of sections of protrusions 14 are simultaneously inserted into the matching grooves 25 and the matching grooves 26, so that the sealing performance between the bottle valve seat 20 and the bottle body 10 is better.

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. 1 to 5, the cylindrical bottle body 10 is composed of a middle straight bottle body 16 and two open ends 11, the wall thickness H of the straight bottle body 16 is uniform, and the wall thickness H of the open end 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 utility model 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 that the safety is improved. 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.

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. 9, in the second embodiment, the radius of curvature R of the wall surface of the valve body 21 away from the first protrusion 22 is equal to the radius of curvature R of the outer wall surface of the opening end 11, so that the contour of the end of the assembled gas cylinder is smooth and arc-shaped, and 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.

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, 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 an annular groove 27 of the first protruding part 22 is embedded and assembled with an annular protrusion 121 of the connecting notch 12 to realize good sealing performance, thereby ensuring the sealing performance after the bottle valve seat 20 and the bottle body 10 are connected. 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);

the first protruding part (22) is inserted and fixed in the connecting notch (12), at least one annular groove (27) is formed in the outer wall of the first protruding part (22), an annular protrusion (121) matched with the annular groove (27) is arranged on the wall surface, facing the first protruding part (22), of the connecting notch (12), the annular protrusion (121) is fittingly embedded in the annular groove (27), and the annular protrusion (121) and the annular groove (27) are abutted to form a seal.

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

the number of the annular grooves (27) is multiple, the annular grooves (27) are distributed at intervals along the axial direction of the first protruding part (22), the annular protrusions (121) correspond to the annular grooves (27) in a one-to-one mode, and each annular protrusion (121) is respectively embedded with the corresponding annular groove (27) to form sealing.

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

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, adjacent two be equipped with between arch (13) protruding section (14), the both ends of protruding section (14) respectively with two protruding (13) link to each other, 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 protruding (13) one-to-one, adjacent two it has cooperation ditch (26) to open between cooperation groove (25), the both ends of cooperation ditch (26) communicate two respectively cooperation groove (25), protruding (13) embedding in cooperation groove (25), protruding section (14) embedding in cooperation ditch (26).

4. A gas cylinder according to claim 3,

be equipped with heavy groove (15) on open end (11), it sets up to connect notch (12) the middle part of heavy groove (15), it is a plurality of protruding (13) and a plurality of protruding section (14) all set up on the groove diapire of heavy groove (15), valve body (21) circumference profile shape with heavy groove (15) looks adaptation, valve body (21) embedding in heavy groove (15), valve body (21) orientation the wall of bottle (10) with the tank bottom face of heavy groove (15) is laminated mutually, and, keep away from valve body (21) the wall of first protruding portion (22) with smooth transition between the outer wall of open end (11).

5. A gas cylinder according to claim 4,

and adhesive glue is arranged between the wall surface of the valve body (21) facing the bottle body (10) and the groove bottom surface of the sinking groove (15).

6. A gas cylinder according to any one of claims 1 to 5,

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

7. A gas cylinder according to claim 6,

the bottle body (10) is columnar, the two ends of the bottle body (10) are the opening ends (11), the columnar bottle body (10) is composed of a middle straight-cylinder bottle body (16) and the opening 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 larger than or equal to the wall thickness H of the straight-cylinder bottle body (16).

8. A gas cylinder according to claim 6,

the bottle (10) is the column, the both ends of bottle (10) are open end (11), the column bottle (10) by middle straight section of thick bamboo body (16) and both ends open end (11) are constituteed, the wall thickness H of open end (11) is greater than the wall thickness H of straight section of thick bamboo body (16), the wall thickness H of open end (11) by straight section of thick bamboo body (16) to the direction of open end (11) is the bodiness gradually, and, straight section of thick bamboo body (16) with the wall thickness of the position of meeting of open end (11) by straight section of thick bamboo body (16) to the direction of open end (11) is the bodiness transition gradually.

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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