CN214037817U - Gas cylinder and sealing structure thereof - Google Patents
Gas cylinder and sealing structure thereof Download PDFInfo
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- CN214037817U CN214037817U CN202023180906.6U CN202023180906U CN214037817U CN 214037817 U CN214037817 U CN 214037817U CN 202023180906 U CN202023180906 U CN 202023180906U CN 214037817 U CN214037817 U CN 214037817U
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Abstract
The invention relates to the field of gas cylinder sealing, in particular to a gas cylinder and a sealing structure thereof, wherein the gas cylinder comprises a joint connected with a cylinder opening and a plurality of sealing components; the joint is provided with an external thread which is used for being in threaded connection with an inner hole of the bottle mouth, and a plurality of accommodating grooves are formed in the non-threaded part of the joint; the sealing assembly is located in the accommodating groove and used for sealing a gap between the joint and the bottle mouth after the joint is in threaded connection with the bottle mouth. Through above-mentioned seal structure, seal assembly is located the holding tank, can prevent that seal assembly from producing the activity and even coming off carrying out the in-process sealed to the gas cylinder, and further improvement carries out sealed effect to the gas cylinder.
Description
Technical Field
The application relates to the field of gas cylinder sealing, in particular to a gas cylinder and a sealing structure thereof.
Background
In China, fuel cell electric automobiles are in a rapid development stage, at present, most of the fuel cell electric automobiles adopt a 35MPa hydrogen system, and a 70MPa hydrogen system also enters a small-batch trial stage. Because the working pressure is up to 70MPa, and a plurality of gas cylinders are required to be installed in a single set of system, when the whole vehicle is designed, the hydrogen system is usually installed at the top of the vehicle in view of safety according to the characteristic of hydrogen leakage.
At present, sealing structures for 70MPa vehicle hydrogen cylinders are matched with foreign inlet valves, and the valves are generally provided with components such as temperature sensors, pressure sensors, electromagnetic valves and the like, so that the occupied length space is large. Most of existing valves adopt a radial sealing mode, when a bottle mouth is sealed through a connector, the connector is in threaded connection with an inner hole of the bottle mouth, a single sealing ring is used for sealing, and the single sealing ring is located at the rear end of threads of the connector. Because the inner hole is formed in the bottle mouth, and the length of the bottle mouth is long, the machining precision is greatly influenced by the equipment precision, the cutter and the process when the bottle mouth is machined, and the actual sealing effect is poor. Therefore, a sealing structure for a gas cylinder is needed to improve the sealing effect of the gas cylinder.
SUMMERY OF THE UTILITY MODEL
An object of this paper embodiment is to provide a gas cylinder and seal structure thereof to improve the effect when sealing the gas cylinder.
In order to achieve the above object, in one aspect, embodiments herein provide a gas cylinder sealing structure, including a joint connected to a cylinder opening, a plurality of sealing assemblies;
the joint is provided with an external thread which is used for being in threaded connection with an inner hole of the bottle mouth, and a plurality of accommodating grooves are formed in the non-threaded part of the joint;
the sealing assembly is located in the accommodating groove and used for sealing a gap between the joint and the bottle mouth after the joint is in threaded connection with the bottle mouth.
Preferably, each of the receiving grooves is provided on the outer peripheral wall of the joint and is provided along the circumferential direction thereof.
Preferably, the accommodating groove comprises a first annular groove and a second annular groove, the first annular groove is located at one end of the joint close to the root of the bottle mouth, and the second annular groove is located at one end of the joint close to the head of the bottle mouth.
Preferably, each sealing assembly comprises a sealing ring and a retainer ring;
the sealing ring is positioned on one side of the accommodating groove close to the root part of the bottle mouth;
the retainer ring is positioned on one side of the accommodating groove close to the bottle mouth head.
Preferably, the sealing ring and the peripheral wall of the retainer ring are all protruded from the corresponding accommodating groove.
Preferably, the outer diameter of the retainer ring in each set of the sealing assembly is larger than or equal to the outer diameter of the sealing ring.
Preferably, the sealing component is an elastomeric component.
Preferably, the sealing gasket is arranged at the position of the joint, which is close to the head part of the bottle mouth.
Preferably, the contact surface of the sealing assembly and the bottle mouth is an inclined surface inclined towards the central axis of the joint, or a plurality of grooves are formed in the contact surface of the sealing assembly and the bottle mouth.
On the other hand, the embodiment herein further provides a gas cylinder, which includes any one of the above-mentioned sealing structure and a cylinder body, wherein the sealing structure is connected with the cylinder mouth of the cylinder body, and the sealing structure is used for sealing the cylinder mouth of the cylinder body.
According to the technical scheme provided by the embodiment, the embodiment has the advantages that the sealing effect of the gas cylinder is improved through the sealing assembly and the gap between the sealing joint and the bottle opening through the accommodating groove and the sealing assembly arranged in the accommodating groove. The sealing assembly is located the holding tank, can prevent that sealing assembly from producing the activity and even droing carrying out the in-process sealed to the gas cylinder, and further improvement carries out sealed effect to the gas cylinder.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art 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 that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 shows a cross-sectional view of a sealing structure of a gas cylinder provided in embodiments herein;
fig. 2 is a schematic structural diagram illustrating a retainer ring and a seal ring in a seal structure of another gas cylinder provided in an embodiment of the present disclosure;
fig. 3 shows a schematic structural diagram of a retainer ring and a seal ring in a seal structure of a further gas cylinder provided in an embodiment of the present disclosure.
Description of the symbols of the drawings:
1. a joint;
2. a sealing gasket;
3. a retainer ring;
4. a seal ring;
5. a bottle mouth;
6. an external thread;
7. a first annular groove;
8. a second annular groove;
9. a bottle body;
10. a seal assembly;
11. accommodating grooves;
12. and (4) a groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments herein without making any creative effort, shall fall within the scope of protection.
Most of existing valves adopt a radial sealing mode, when a bottle mouth is sealed through a connector, the connector is in threaded connection with an inner hole of the bottle mouth, a single sealing ring is used for sealing, and the single sealing ring is located at the rear end of threads of the connector. Because the inner hole is formed in the bottle mouth, and the length of the bottle mouth is long, the machining precision is greatly influenced by the equipment precision, the cutter and the process when the bottle mouth is machined, and the actual sealing effect is poor.
In order to solve the above problem, embodiments herein provide a gas cylinder sealing structure, which can improve the effect of sealing a gas cylinder.
Referring to fig. 1, the gas cylinder sealing structure comprises a connector 1 connected with a bottle opening 5 and a plurality of sealing assemblies 10. The outer peripheral wall of the joint 1 is provided with an external thread 6 which is in threaded connection with an inner hole of the bottle mouth 5, and the external thread 6 is arranged along the direction from the head to the root of the bottle mouth 5. The root of the bottle mouth 5 is positioned at the position where the bottle mouth 5 is close to the bottle body 9, and the head of the bottle mouth 5 is positioned at the position where the bottle mouth 5 is far away from the bottle body 9.
In the embodiment, the non-threaded portion of the joint 1 is provided with a plurality of receiving grooves 11 corresponding to the sealing assembly 10, and each receiving groove 11 is disposed on the outer circumferential wall of the joint 1 and along the circumferential direction thereof. A sealing assembly 10 is located in the corresponding receiving groove 11, and the sealing assembly 10 is used for sealing the gap between the joint 1 and the bottle mouth 5 after the joint 1 is in threaded connection with the bottle mouth 5. Seal assembly 10 is located holding tank 11, and holding tank 11's setting can prevent that seal assembly 10 from droing, prevents that seal assembly 10 from producing unnecessary activity in the gap between butt joint 1 and bottleneck 5 carries out sealed in-process, and then improves seal assembly 10 and connect the stability of department, improves sealed effect at the joint 1.
In the embodiment herein, the plurality of receiving grooves 11 comprises a first annular groove 7 and a second annular groove 8, the first annular groove 7 being located at the end of the coupling 1 close to the root of the mouth 5, the second annular groove 8 being located at the end of the coupling 1 close to the head of the mouth 5. Since unnecessary gaps may exist at the threaded connection after the adaptor 1 is screwed with the bottle mouth 5, the sealing assemblies 10 in the first annular groove 7 and the second annular groove 8 at the two ends of the adaptor 1 can perform better sealing function on the threaded connection. The seal assembly 10 in the second annular groove 8 may also serve as a supplemental seal if the seal assembly 10 in the first annular groove 7 fails.
In other embodiments herein, the plurality of receiving grooves 11 may further include more than two annular grooves, and the number of the annular grooves may depend on the length of the non-threaded portion of the joint, which is not limited herein. However, considering that the increase of the number of the annular grooves can increase the production difficulty of the joint, the number of the annular grooves is 2-5 in general.
In the embodiment, each sealing assembly 10 comprises a sealing ring 4 and a retaining ring 3, the sealing ring 4 and the retaining ring 3 are respectively arranged in the first annular groove 7 and the second annular groove 8, the sealing ring 4 is positioned on one side of the first annular groove 7 or the second annular groove 8 close to the root of the bottle mouth 5, and the retaining ring 3 is positioned on one side of the first annular groove 7 or the second annular groove 8 close to the head of the bottle mouth 5. Each sealing component 10 is an elastic component, specifically, the sealing ring 4 may be made of soft rubber, the retainer ring 3 may be made of leather, hard rubber or polytetrafluoroethylene, and the materials of the sealing ring 4 and the retainer ring 3 are not specifically limited.
The direction shown by the arrow in fig. 1 is the flow direction of the medium inside the gas cylinder, and is influenced by the flow direction of the medium inside the gas cylinder, so that the gas pressure inside the gas cylinder is higher, and the gas pressure at the root of the bottle opening 5 is higher than the gas pressure at the head of the bottle opening 5. Under the influence of air pressure, the sealing ring 4 is possibly extruded into the inner hole of the bottle mouth 5 and the gap between the joints 1, and after the retainer ring 3 is arranged, the situation can be avoided. Because the material of retaining ring 3 is than the hardness of sealing washer 4 and have sufficient elasticity to retaining ring 3 sets up the one side opposite at the sealing washer 4 pressurized side, receives under the effect of atmospheric pressure at sealing washer 4, and retaining ring 3 can prevent that sealing washer 4 from being crowded into the hole of bottleneck 5 and the gap between the joint 1, prevents that sealing washer 4 from receiving the damage.
Further, the outer diameter of the retainer ring 3 in each set of seal assembly 10 is greater than or equal to the outer diameter of the seal ring 4, and the outer peripheral walls of the seal ring 4 and the retainer ring 3 protrude from the corresponding first annular groove 7 or second annular groove 8. When the outer diameter of the retainer ring 3 is larger than or equal to the outer diameter of the sealing ring 4, the above-identified effect of preventing the sealing ring 4 from being squeezed into the inner hole of the bottle mouth 5 and the gap between the joints 1 and preventing the sealing ring 4 from being damaged can be achieved. Because sealing washer 4 and retaining ring 3 all have certain elasticity, can better fill up the gap between bottleneck 5 and the joint 1 after the periphery wall protrusion of both with bottleneck 5 and the two-way extruded effect of joint 1, and then play better sealed effect.
The joint 1 is provided with a sealing washer 2 at the head part position close to the bottle mouth 5, and the sealing washer 2 is an elastic sealing washer 2. Specifically, the sealing washer 2 may be made of rubber. The sealing washer 2 not only can play a role in supplementing sealing, but also can prevent external impurities from entering the gas cylinder.
Referring to fig. 2, in some embodiments, the contact surface of the sealing assembly 10 and the bottle mouth 5 can be a slope inclined towards the central axis of the joint 1, i.e. in each set of sealing assemblies 10, the outer diameters of the sealing ring 4 and the retainer ring 3 gradually increase along the flow direction of the gas cylinder internal medium. Through such setting, retaining ring 3 can play the effect that prevents that sealing washer 4 from being crowded into the hole of bottleneck 5 and connecting in the gap between 1, moreover, the inclined plane setting of seal assembly 10 can play certain guide effect when inserting joint 1 in bottleneck 5 rather than threaded connection for it is more convenient to connect.
Referring to fig. 3, in some embodiments, the contacting surface of the sealing assembly 10 with the bottle mouth 5 is provided with a plurality of grooves 12, the grooves 12 may be uniformly arranged on the outer peripheral walls of the sealing ring 4 and the retainer ring 3, the grooves 12 may be square grooves, circular grooves, etc., and the specific shape of the grooves 12 is not limited herein. Because sealing washer 4 and retaining ring 3 all have certain elasticity, and the periphery wall of sealing washer 4 and retaining ring 3 all protrudes in first ring channel 7 or the second ring channel 8 that corresponds for behind the hole threaded connection who will connect 1 with bottleneck 5, sealing washer 4 and retaining ring 3 all are in compression state, and sealing washer 4 and retaining ring 3 all have certain tension in the footpath of connecting 1. After the groove 12 is arranged, the friction force between the sealing ring 4 or the retainer ring 3 and the inner hole of the bottle mouth 5 can be increased, and under the combined action of the tension and the friction force, the sealing ring 4 or the retainer ring 3 is prevented from falling off, so that the sealing effect is improved.
The embodiment of the invention also provides a gas cylinder, and referring to fig. 1, the gas cylinder comprises any one of the gas cylinder sealing structures and the gas cylinder body, the gas cylinder body comprises a bottle opening 5 and a bottle body 9 which are connected with each other, the gas cylinder sealing structure is connected with the bottle opening 5 of the gas cylinder body, and the gas cylinder sealing structure is used for sealing the bottle opening 5 of the gas cylinder body.
The principles and embodiments of this document are explained herein using specific examples, which are presented only to aid in understanding the methods and their core concepts; meanwhile, for the general technical personnel in the field, according to the idea of this document, there may be changes in the concrete implementation and the application scope, in summary, this description should not be understood as the limitation of this document.
Claims (10)
1. A gas cylinder sealing structure is characterized by comprising a joint connected with a bottle opening and a plurality of sealing components;
the joint is provided with an external thread which is used for being in threaded connection with an inner hole of the bottle mouth, and a plurality of accommodating grooves are formed in the non-threaded part of the joint;
the sealing assembly is located in the accommodating groove and used for sealing a gap between the joint and the bottle mouth after the joint is in threaded connection with the bottle mouth.
2. A gas cylinder sealing structure according to claim 1, characterized in that each of said receiving grooves is provided on and along a circumferential direction of an outer circumferential wall of said joint.
3. A gas cylinder sealing structure according to claim 2, characterized in that the receiving groove comprises a first annular groove located at an end of the nipple near the root of the mouth and a second annular groove located at an end of the nipple near the head of the mouth.
4. A gas cylinder sealing structure according to claim 1, characterized in that each sealing assembly comprises a sealing ring and a retainer ring;
the sealing ring is positioned on one side of the accommodating groove close to the root part of the bottle mouth;
the retainer ring is positioned on one side of the accommodating groove close to the bottle mouth head.
5. A gas cylinder sealing structure according to claim 4, characterized in that the outer peripheral walls of the sealing ring and the retainer ring each protrude from the corresponding receiving groove.
6. A gas cylinder sealing structure according to claim 4, characterized in that the outer diameter of the retainer ring in each set of said sealing assemblies is greater than or equal to the outer diameter of the seal ring.
7. A gas cylinder sealing structure according to claim 1, characterized in that the sealing component is an elastic component.
8. A gas cylinder sealing structure according to claim 1, characterized by further comprising: and the sealing gasket is arranged at the position of the joint, which is close to the head part of the bottle mouth.
9. A gas cylinder sealing structure according to claim 1, characterized in that the contact surface of the sealing component and the cylinder mouth is an inclined surface inclined towards the central axis of the joint, or a plurality of grooves are arranged on the contact surface of the sealing component and the cylinder mouth.
10. A gas cylinder, characterized by comprising the gas cylinder sealing structure and a cylinder body as claimed in any one of claims 1 to 9, wherein the gas cylinder sealing structure is connected with a cylinder opening of the cylinder body, and the gas cylinder sealing structure is used for sealing the cylinder opening of the cylinder body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023180906.6U CN214037817U (en) | 2020-12-25 | 2020-12-25 | Gas cylinder and sealing structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023180906.6U CN214037817U (en) | 2020-12-25 | 2020-12-25 | Gas cylinder and sealing structure thereof |
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| Publication Number | Publication Date |
|---|---|
| CN214037817U true CN214037817U (en) | 2021-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023180906.6U Active CN214037817U (en) | 2020-12-25 | 2020-12-25 | Gas cylinder and sealing structure thereof |
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| Country | Link |
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| CN (1) | CN214037817U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113739062A (en) * | 2021-09-07 | 2021-12-03 | 中国工程物理研究院激光聚变研究中心 | Vacuum coating air source quick-change device |
-
2020
- 2020-12-25 CN CN202023180906.6U patent/CN214037817U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113739062A (en) * | 2021-09-07 | 2021-12-03 | 中国工程物理研究院激光聚变研究中心 | Vacuum coating air source quick-change device |
| CN113739062B (en) * | 2021-09-07 | 2023-03-14 | 中国工程物理研究院激光聚变研究中心 | Vacuum coating air source quick-change device |
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