End sealing structure of winding gas cylinder

Abstract

The end sealing structure comprises a bottle body, a connector is welded to the top of the bottle body, an external valve head is installed on the top of the connector, and a plurality of threaded holes are formed in the top of the connector. A plugging assembly is installed at the top end in the connector, when the plugging assembly is used for installing and replacing an external valve head in a threaded hole, only the external valve head needs to be rotated in the reverse direction, a sealing disc is gradually and automatically attached to the top end in the connector under the thrust action of a spring to complete automatic sealing, and when the external valve head is not installed, the sealing performance in a bottle body is improved; and meanwhile, when the external valve head is replaced, the interior of the bottle body is automatically sealed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to gas cylinder technical field, and specifically relates to a sealing structure of end part of winding gas cylinder. BACKGROUND

[0002] The gas cylinder usually refers to the movable pressure container for containing permanent gas, liquefied gas or dissolved gas and repeatedly charging. With the development of composite material forming technology and the market development trend of light weight, the composite gas cylinder, especially the non-metal inner container full winding gas cylinder, has developed rapidly and has become the mainstream in the world. The composite gas cylinder is composed of a composite layer and an inner container. The gas type inner container is a gas cylinder of non-metal material. Compared with other gas cylinder products, the non-metal inner container winding gas cylinder has the advantages of no stress corrosion and hydrogen embrittlement, excellent fatigue resistance, excellent acid and alkali corrosion resistance and excellent impact resistance.

[0003] The traditional sealing structure of the end part of the winding gas cylinder usually relies on a complex sealing assembly and a fastening device to realize the sealing between the bottle body and the external connecting component. However, these traditional structures are often cumbersome to operate when replacing the external valve head or performing maintenance, and the sealing performance is easily affected by human operation factors. In addition, in the long-term use process, the reliability of the traditional sealing structure will gradually decrease due to the aging and wear of the sealing material. SUMMARY

[0004] The utility model aims at providing a sealing structure of end part of winding gas cylinder to solve the problems of valve head installation and internal sealing of the gas cylinder in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A sealing structure of end part of winding gas cylinder, comprising a bottle body, a joint is welded on the top of the bottle body, an external valve head is installed on the top of the joint, a plurality of threaded holes are formed in the top of the joint, a plugging assembly is installed at the top end inside the joint, and the plugging assembly is installed inside the threaded hole.

[0007] Further, the plugging assembly comprises a sealing disc, the sealing disc is arranged at the top end inside the joint, a plurality of fixed blocks are arranged on the surface of the sealing disc, springs are fixed on the fixed blocks, fixed heads are arranged at the top of the springs, and the fixed heads are installed in the threaded holes.

[0008] Further, a positioning groove is formed in the inside of the fixed head, a connecting rod is rotatably connected in the positioning groove, a screw rod is fixed on the top of the connecting rod, and the screw rod is engaged with the threaded hole.

[0009] The fixed head is connected with the screw rod, the connecting rod can rotate freely in the positioning groove by cooperation of the connecting rod and the positioning groove, the installation position of the screw rod in the threaded hole is adjusted by engagement of the screw rod and the threaded hole, so that the traction tension of the adjusting spring is pulled.

[0010] Further, a groove is formed in the inner top end of the joint, and a gasket is mounted on the surface of the sealing disc.

[0011] The gasket is an O-shaped gasket, when the sealing disc is attached to the inner top end of the joint, i.e. the gasket is compressed in the groove, it can effectively fill the small gap between the joint and the sealing disc, thereby further enhancing the sealing performance of the entire bottle body and preventing gas leakage.

[0012] Further, when the gas in the bottle body is released, a gas guide column is mounted in the joint, a gas vent hole is formed in the gas guide column, a rounded corner is arranged at the bottom of the gas guide column, a plurality of inclined holes are formed on the surface of the rounded corner, and the inclined holes are communicated with the gas vent hole. The pressing of the sealing disc adopts the gas guide column; the gas guide column can be arranged in a threaded connection mode or a pressing mode; when the gas guide column is pressed out of the sealing disc downward, the gas in the bottle body enters the inclined holes and then the gas vent hole, thereby completing the discharge of the gas.

[0013] The technical scheme of the utility model has the following beneficial effects:

[0014] 1. The external valve head is rotated and tightened, the spring is stretched and deformed, the external valve head will support the sealing disc downward, so that the sealing disc is separated from the inner top end of the joint, at this time, the gas in the bottle body enters the gap between the sealing disc and the joint, and the gas enters the internal part of the external valve head from the gas guide groove, thereby completing the automatic ventilation between the internal part of the bottle body and the external valve head.

[0015] 2. When the external valve head is replaced, the external valve head is only needed to be rotated in the reverse direction, the sealing disc is gradually automatically attached to the inner top end of the joint under the pushing force of the spring, thereby completing the automatic sealing, when the external valve head is not installed, the sealing performance of the internal part of the bottle body is improved; meanwhile, the internal part of the bottle body is automatically sealed when the external valve head is replaced. DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description.

[0017] Figure 1 It is the overall structure schematic diagram of the utility model.

[0018] Figure 2 It is the overall cross-sectional structure schematic diagram of the utility model.

[0019] Figure 3 It is the dismounting structure diagram of the external valve head of the utility model.

[0020] Figure 4 It is the schematic view of the plugging assembly of the utility model.

[0021] Figure 5 It is the schematic view of the screw rod split structure of the utility model.

[0022] Figure 6 It is the schematic view of the air guide column installation structure of the utility model.

[0023] Figure 7 It is the internal section view of the air guide column of the utility model.

[0024] Reference signs: 10, bottle body; 20, joint; 201, threaded hole; 30, external valve head; 301, air guide groove; 302, groove; 40, plugging assembly; 401, sealing disc; 402, gasket; 403, fixed block; 404, spring; 405, fixed head; 406, positioning groove; 407, screw rod; 408, connecting rod; 50, air guide column; 501, air leakage hole; 502, round corner; 503, inclined hole. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model will be further described in detail below by combining with the drawings and examples. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model. Based on the examples in the utility model, all other examples obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0026] Example one:

[0027] Reference Figure 1 A kind of end sealing structure of winding gas cylinder, including bottle body 10, joint 20 is welded on the top of bottle body 10, external valve head 30 is installed on the top of joint 20, and a plurality of threaded holes 201 are formed in the top of joint 20;External valve head 30 is rotated into the inside installation of joint 20 using threaded connection mode;

[0028] Reference Figures 2-5 Joint 20 is installed with plugging assembly 40 in the top end inside, and plugging assembly 40 is installed in the inside of threaded hole 201.The bottom of external valve head 30 is provided with a plurality of air guide grooves 301.Plugging assembly 40 includes sealing disc 401, and sealing disc 401 is arranged in the top end inside of joint 20, the surface of sealing disc 401 is provided with a plurality of fixed blocks 403, spring 404 is fixed on fixed block 403, fixed head 405 is arranged on the top of spring 404, and fixed head 405 is installed in threaded hole 201.

[0029] In the above scheme, the external valve head 30 is screwed into the connector 20, and the bottom of the external valve head 30 contacts the surface of the sealing disc 401. When the external valve head 30 is continuously screwed, the spring 404 is stretched and deformed, and the external valve head 30 pushes the sealing disc 401 downward, so that the sealing disc 401 is separated from the top end of the connector 20, that is, a gap is formed between the sealing disc 401 and the connector 20, and the gas guide groove 301 enters the inside of the bottle body 10. At this time, the gas in the inside of the bottle body 10 enters the gap between the sealing disc 401 and the connector 20, and the gas enters the inside of the external valve head 30 from the gas guide groove 301, and the automatic ventilation between the inside of the bottle body 10 and the external valve head 30 is completed.

[0030] When the external valve head 30 needs to be replaced, the external valve head 30 is only needed to be rotated in the opposite direction. Under the pushing force of the spring 404, the sealing disc 401 is gradually automatically attached to the top end of the connector 20 to complete automatic sealing. When the external valve head 30 is not installed, the sealing performance of the inside of the bottle body 10 is improved. At the same time, when the external valve head 30 is replaced, the inside of the bottle body 10 is automatically sealed.

[0031] Further, the inside of the fixed head 405 is provided with a positioning groove 406, and the connecting rod 408 is rotatably connected in the positioning groove 406. The top of the connecting rod 408 is fixedly provided with a screw rod 407, and the screw rod 407 is engaged with the threaded hole 201.

[0032] In a further embodiment, the fixed head 405 is connected with the screw rod 407, and the connecting rod 408 and the positioning groove 406 are matched. The connecting rod 408 can be freely rotated in the positioning groove 406. By engaging the screw rod 407 with the threaded hole 201, the installation position of the screw rod 407 in the threaded hole 201 is adjusted, so that the pulling force of the spring 404 is adjusted. The screw rod 407 is also used for installing the positioning sealing disc 401.

[0033] Further, the top end of the connector 20 is provided with a groove 302, and the surface of the sealing disc 401 is provided with a gasket 402. The gasket 402 is an O-shaped gasket. When the sealing disc 401 is attached to the top end of the connector 20, that is, the gasket 402 is pressed in the groove 302, it can effectively fill the small gap between the connector 20 and the sealing disc 401, so as to further enhance the sealing performance of the entire bottle body 10 and prevent gas leakage. Note that the self-pressure of the inside of the bottle body 10 can also extrude the sealing disc 401, which has an automatic sealing function.

[0034] Example two:

[0035] Reference Figure 6 and Figure 7When the gas inside the bottle body 10 is released, the gas guide column 50 is installed in the joint 20, the gas guide column 50 is provided with the gas leakage hole 501 in the inside, the bottom of the gas guide column 50 is provided with the round corner 502, and the round corner 502 is provided with a plurality of inclined holes 503.

[0036] In the above scheme, when the gas inside the bottle body 10 needs to be released, the sealing disc 401 is only needed to be pressed downward, so that the sealing disc 401 is separated from the bottom end inside the joint 20, and the function of discharging the gas inside the bottle body 10 is achieved.

[0037] Alternatively, the pressing of the sealing disc 401 adopts the gas guide column 50, the gas guide column 50 can be provided in a threaded connection mode or a pressing mode, when the gas guide column 50 is pressed out of the sealing disc 401, the gas inside the bottle body 10 enters the gas leakage hole 501 through the inclined hole 503, and the discharge of the gas is completed.

[0038] The round corner 502 is provided, when the gas guide column 50 is in the threaded connection mode, the inclined hole 503 provided at the bottom of the round corner 502 does not affect the connection of the thread.

[0039] The specific implementation process of the utility model is as follows:

[0040] The external valve head 30 is rotated and screwed into the joint 20, the bottom of the external valve head 30 contacts the surface of the sealing disc 401, the external valve head 30 is continuously rotated and screwed, the spring 404 is stretched and deformed, the external valve head 30 supports the sealing disc 401 downward, so that the sealing disc 401 is separated from the top end inside the joint 20, that is, the gap is formed between the sealing disc 401 and the joint 20, and the gas guide groove 301 enters the inside of the bottle body 10; at this time, the gas inside the bottle body 10 enters the gap between the sealing disc 401 and the joint 20, and the gas enters the inside of the external valve head 30 from the gas guide groove 301.

[0041] When the external valve head 30 is replaced, the external valve head 30 is only needed to be rotated in the opposite direction, the sealing disc 401 is gradually automatically attached to the top end inside the joint 20 under the pushing force of the spring 404, and the automatic sealing is completed.

[0042] The above examples are only exemplary embodiments of the utility model and are not used for limiting the utility model, and the protection scope of the utility model is limited by the claims. In the utility model, various modifications or equivalent replacements can be made within the utility model. The modification or equivalent replacement should also be regarded as falling within the protection scope of the utility model.

[0043] In the description of the utility model, it is explained that, the terms "inner", "front", "rear", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, and are merely used for facilitating the description of the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms indicating the orientation or positional relationship cannot be understood as a limitation on the utility model.

[0044] In the description of the utility model, it needs to be further explained that, unless otherwise explicitly specified and limited. The terms "set", "connected" should be understood broadly, for example, these terms can represent the fixed connection, detachable connection or integral connection between elements; can also represent mechanical connection, electrical connection; can also make direct connection or indirect connection through intermediate medium. For ordinary skilled in the art, the specific meaning of these terms in the utility model can be understood according to the specific circumstances.

Claims

1. An end-sealing structure for a wound gas cylinder, comprising a cylinder body (10), characterized in that: The top of the bottle body (10) is welded with a connector (20), the top of the connector (20) is equipped with an external valve head (30), and the top of the connector (20) is provided with several threaded holes (201); A sealing assembly (40) is installed at the top of the inside of the connector (20), and the sealing assembly (40) is installed inside the threaded hole (201).

2. The end sealing structure for a wound gas cylinder according to claim 1, characterized in that: The bottom of the external valve head (30) is provided with several air guide grooves (301).

3. The end sealing structure for a wound gas cylinder according to claim 2, characterized in that: The sealing assembly (40) includes a sealing disc (401) which is disposed at the top of the inside of the connector (20). The surface of the sealing disc (401) is provided with a plurality of fixing blocks (403). A spring (404) is fixed on the fixing block (403). A fixing head (405) is provided on the top of the spring (404). The fixing head (405) is installed in the threaded hole (201).

4. The end sealing structure for a wound gas cylinder according to claim 3, characterized in that: The fixing head (405) has a positioning groove (406) inside, and a connecting rod (408) is rotatably connected in the positioning groove (406). A screw (407) is fixed on the top of the connecting rod (408), and the screw (407) meshes with the threaded hole (201).

5. The end sealing structure for a wound gas cylinder according to claim 4, characterized in that: The connector (20) has a groove (302) at its top inside, and a gasket (402) is installed on the surface of the sealing disc (401).

6. The end sealing structure for a wound gas cylinder according to claim 3, characterized in that: When releasing the gas inside the bottle (10), a gas guide column (50) is installed inside the connector (20). A vent hole (501) is opened inside the gas guide column (50). A rounded corner (502) is provided at the bottom of the gas guide column (50). Several oblique holes (503) are opened on the surface of the rounded corner (502). The oblique holes (503) are connected to the vent hole (501).

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