A sealing structure for the nozzle of a thin-walled metal gas cylinder

Abstract

The present invention discloses a sealing structure for the nozzle of a thin-walled metal gas cylinder, comprising: a metal inner liner for containing a compressed medium; a flexible nozzle disposed at the mouth position of the metal inner liner; a nozzle sleeve sleeved and fixed on the outer wall of the flexible nozzle; and an external interface threadedly connected to the outer wall of the nozzle sleeve. The end of the flexible nozzle is turned outwards to fit the end face of the nozzle sleeve and is tightly arranged between the nozzle sleeve and the external interface. The present invention has the following advantages and effects: By providing a flexible nozzle that can be folded, a seal is automatically formed between the nozzle sleeve and the external joint, thereby enhancing the sealing performance of the entire gas cylinder during use.

Description

Technical Field

[0001] The present invention relates to the field of gas cylinder sealing, and particularly to a nozzle sealing structure for a thin-walled metal gas cylinder. Background Art

[0002] A gas cylinder refers to a mobile pressure vessel that can be refilled repeatedly under normal environmental conditions, with a nominal working pressure of 1.0 - 70 MPa and a nominal volume of 0.4 - 1000 L, used to contain permanent gases, liquefied gases or dissolved gases.

[0003] When using a traditional metal gas cylinder, an external joint needs to be fixed at the nozzle position of the gas cylinder to release the medium inside the gas cylinder. The traditional connection method usually uses threads for connection, and the sealing performance at the connection position between the external joint and the gas cylinder is poor and needs to be improved. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a nozzle sealing structure for a thin-walled metal gas cylinder, which has the effect of high sealing performance.

[0005] The above technical purpose of the present invention is achieved through the following technical solutions: A nozzle sealing structure for a thin-walled metal gas cylinder, comprising:

[0006] A metal inner liner, containing a compressed medium;

[0007] A flexible nozzle, arranged at the bottle mouth position of the metal inner liner;

[0008] A nozzle sleeve, sleeved and fixed on the outer wall of the flexible nozzle;

[0009] An external interface, threadedly connected to the outer wall of the nozzle sleeve;

[0010] Wherein the end of the flexible nozzle turns outwards and fits against the end face of the nozzle sleeve, and is tightly arranged between the nozzle sleeve and the external interface.

[0011] By adopting the above technical solutions, when using the above sealing structure, first sleeve and fix the nozzle sleeve on the outer wall of the flexible nozzle, then control the flexible nozzle to turn outwards so that the flexible nozzle fits against the end face of the nozzle sleeve, and finally tighten the external interface, using the nozzle sleeve and the external interface to clamp the turned edge of the flexible nozzle. At this time, the turned edge of the flexible nozzle automatically forms a seal between the nozzle sleeve and the external joint, thereby increasing the sealing performance when the entire gas cylinder is in use.

[0012] The present invention can be further configured in a preferred example as: A circle of card slots is arranged on the outer wall of the end of the nozzle sleeve, and the end of the flexible nozzle continues to turn outwards and is embedded in the card slots.

[0013] By adopting the above technical solution, by providing a flexible nozzle that can be folded multiple times, the end of the nozzle sleeve is covered, and the axial and circumferential positioning of the flexible nozzle is achieved. Therefore, when the external interface is tightened, the sealing performance of the connection position can be further enhanced.

[0014] In a preferred embodiment of the present invention, it can be further configured that: an arc chamfer is provided at the end face position of the nozzle sleeve.

[0015] By adopting the above technical solution, by providing the chamfer, the pressure on the flexible nozzle at the edge position of the nozzle sleeve is reduced, preventing the flexible nozzle from being cut or scratched, and improving the service life of the flexible nozzle.

[0016] In a preferred embodiment of the present invention, it can be further configured that: a sealing groove is provided in a circle at the bottom wall of the card slot, and a sealing ring for embedding into the sealing groove is provided on the outer side wall of the flexible nozzle.

[0017] By adopting the above technical solution, by providing the sealing ring to be snap-fitted into the sealing groove, not only the snap-fitting fixation after the flexible nozzle is folded is achieved, but also the sealing performance between the flexible nozzle and the nozzle sleeve is enhanced.

[0018] In a preferred embodiment of the present invention, it can be further configured that: the sealing ring position on the flexible nozzle is formed by an internal and external compression method.

[0019] By adopting the above technical solution, by using the internal and external compression method to process the sealing ring, it is ensured that the thickness of each position of the flexible nozzle is in a consistent state, thereby ensuring the structural strength and service life of the flexible nozzle.

[0020] In a preferred embodiment of the present invention, it can be further configured that: the nozzle sleeve is threadedly connected to the flexible nozzle.

[0021] By adopting the above technical solution, by using the threaded connection method to fix the nozzle sleeve and the flexible nozzle, the installation process of the nozzle sleeve is made more convenient, and at the same time, the connection stability between the two is improved.

[0022] In a preferred embodiment of the present invention, it can be further configured that: the threaded connection position of the flexible nozzle is formed by an internal and external compression method.

[0023] By adopting the above technical solution, by using the internal and external compression method to process the threaded position, it is ensured that the thickness of each position of the flexible nozzle is in a consistent state, thereby ensuring the structural strength and service life of the flexible nozzle.

[0024] In a preferred embodiment of the present invention, it can be further configured that: an outer edge that fits the surface of the metal inner container extends from the nozzle sleeve.

[0025] By adopting the above technical solution, the connection position between the metal inner liner and the flexible nozzle is covered and protected by setting the outer edge, and the support of the flexible nozzle is realized, preventing the flexible nozzle from deforming, thereby ensuring the structural strength and use stability of the flexible nozzle.

[0026] In a preferred example of the present invention, it can be further configured that: both the metal inner liner and the flexible nozzle are thin-walled structures with the same thickness.

[0027] By adopting the above technical solution, by setting the metal inner liner and the flexible nozzle with the same thickness, the production process of the metal inner liner and the flexible nozzle is made more convenient, and at the same time, the stability of the connection position between the two can be ensured after production.

[0028] In a preferred example of the present invention, it can be further configured that: the thickness of the metal inner liner and the flexible nozzle is less than 2 mm.

[0029] By adopting the above technical solution, by setting the metal inner liner and the flexible nozzle with a thickness less than 2 mm, while ensuring the structural strength of the metal inner liner and the flexible nozzle, the weight of the metal inner liner and the flexible nozzle itself is reduced, achieving the effect of convenient transportation.

[0030] In summary, the present invention has the following beneficial effects:

[0031] 1. By setting a flexible nozzle that can be folded, a seal is automatically formed between the nozzle sleeve and the external joint, thereby increasing the sealing performance of the entire gas cylinder during use;

[0032] 2. By setting a flexible nozzle that can be folded multiple times, the end of the nozzle sleeve is covered, realizing the axial and circumferential positioning of the flexible nozzle, and increasing the sealing performance of the connection position;

[0033] 3. By setting the outer edge to cover the connection position between the metal inner liner and the flexible nozzle, the support of the flexible nozzle is realized, preventing the flexible nozzle from deforming, and ensuring the use stability of the flexible nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic structural diagram of an embodiment;

[0035] Figure 2 is a schematic diagram of the connection relationship between the nozzle sleeve and the external interface of the embodiment.

[0036] Reference numerals: 1, metal inner liner; 2, flexible nozzle; 3, nozzle sleeve; 4, external interface; 5, outer edge; 6, card slot; 7, sealing groove; 8, sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] The present invention will be further described in detail below with reference to the accompanying drawings.

[0038] As Figure 1 、 Figure 2 shown, a sealing structure for the nozzle of a thin-walled metal gas cylinder includes a metal inner liner 1, a flexible nozzle 2, a nozzle sleeve 3, and an external interface 4.

[0039] As Figure 1 、 Figure 2 shown, the metal inner liner 1 contains a compressed medium, the flexible nozzle 2 is arranged at the bottle mouth position of the metal inner liner 1 and extends along the axial direction of the metal inner liner 1. Both the metal inner liner 1 and the flexible nozzle 2 are thin-walled structures with the same thickness, and the thickness of the metal inner liner 1 and the flexible nozzle 2 is less than 2 mm, so as to reduce the self-weight of the metal inner liner 1 and the flexible nozzle 2 while ensuring the structural strength of the metal inner liner 1 and the flexible nozzle 2, achieving the effect of convenient transportation.

[0040] As Figure 1 、 Figure 2 shown, the nozzle sleeve 3 is sleeved and fixed on the outer wall of the flexible nozzle 2 and fits the outer wall of the flexible nozzle 2. At the same time, an outer edge 5 that fits the surface of the metal inner liner 1 extends on the nozzle sleeve 3, and the thickness of the outer edge 5 is set to be reduced, so as to ensure that the profile of the nozzle sleeve 3 completely fits the profile of the metal inner liner 1 and covers the connection position of the metal inner liner 1 and the flexible nozzle 2, realizing the support of the flexible nozzle 2 and preventing the flexible nozzle 2 from deforming or wrinkling.

[0041] As Figure 1 、 Figure 2 shown, the end of the flexible nozzle 2 can be turned outwards to fit the end face of the nozzle sleeve 3. At the same time, a groove 6 is arranged on the outer wall of the end of the nozzle sleeve 3, and the end of the flexible nozzle 2 can continue to be turned outwards and embedded in the groove 6. The inner and outer circles at the end face position of the nozzle sleeve 3 are provided with arc chamfers to prevent cutting or scratching the flexible nozzle 2.

[0042] As Figure 1 、 Figure 2 shown, the external interface 4 is threadedly connected to the outer wall of the nozzle sleeve 3 and is used to press and fix the folded part of the flexible nozzle 2 on the surface of the nozzle sleeve 3 and in the groove 6, so as to form a seal between the external interface 4 and the nozzle sleeve 3 and prevent leakage.

[0043] When using the above sealing structure, first sleeve the nozzle sleeve 3 on the outer wall of the flexible nozzle 2 and make the nozzle sleeve 3 fit the outer wall of the metal inner liner 1, and then fix the nozzle sleeve 3. Then stretch the flexible nozzle 2 and control the flexible nozzle 2 to turn outwards, first making the flexible nozzle 2 fit the end face of the nozzle sleeve 3.

[0044] Then, control the flexible nozzle 2 to continue to turn outwards, so that the flexible nozzle 2 is embedded in the card slot 6 on the nozzle sleeve 3, and the inner side wall of the flexible nozzle 2 is flush with the outer side wall of the nozzle sleeve 3, so as to use the flexible nozzle 2 to cover the end of the nozzle sleeve 3.

[0045] Finally, sleeved the external interface 4 on the outer wall of the nozzle sleeve 3. At this time, tighten the external interface 4, and use the nozzle sleeve 3 and the external interface 4 to firmly clamp the flanging of the flexible nozzle 2. At this time, the flanging of the flexible nozzle 2 automatically forms a seal between the nozzle sleeve 3 and the external joint, thereby increasing the sealing performance of the entire gas cylinder during use.

[0046] As Figure 1 、 Figure 2 shown, a circular sealing groove 7 is provided on the bottom wall of the card slot 6, and a sealing ring 8 for embedding in the sealing groove 7 is provided on the outer side wall of the flexible nozzle 2, so as to realize the clamping and fixing of the flexible nozzle 2 after the flexible nozzle 2 is folded. And adopting the embedded fixing method can also increase the sealing performance and stability between the flexible nozzle 2 and the nozzle sleeve 3.

[0047] During the production process of the sealing ring 8, the position of the sealing ring 8 is formed by the internal and external compression method. That is to say, an acting force is applied to the flexible nozzle 2 from the inside to the outside, so that the flexible nozzle 2 bulges from the inside to the outside to form the sealing ring 8. Adopting such a production method can ensure that the thickness of each position of the flexible nozzle 2 is the same, and it is also convenient for the production and processing of the flexible nozzle 2.

[0048] As Figure 1 、 Figure 2 shown, the nozzle sleeve 3 is threadedly connected to the flexible nozzle 2. By adopting the threaded connection method, the fixing between the nozzle sleeve 3 and the flexible nozzle 2 is realized, which makes the installation and disassembly process of the nozzle sleeve 3 more convenient, and at the same time can improve the connection stability between the two.

[0049] During the production process of the thread of the flexible nozzle 2, the threaded connection position of the flexible nozzle 2 is formed by the internal and external compression method. That is to say, acting forces are applied inside and outside together to make the flexible nozzle 2 have regular folds, and these folds happen to be the same as the shape of the thread. Adopting such a production method can ensure that the thickness of each position of the flexible nozzle 2 is the same, and it is also convenient for the production and processing of the flexible nozzle 2.

[0050] The specific embodiments are only explanations of the present invention, and they are not limitations of the present invention. Those skilled in the art can make modifications to the embodiments without creative contributions according to needs after reading this specification, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A sealing structure for the nozzle of a thin-walled metal gas cylinder, characterized in that: Comprising: A metal inner container (1) filled with a compressed medium; A flexible nozzle (2) provided at the bottle mouth position of the metal inner container (1); A nozzle sleeve (3) sleeved and fixed on the outer wall of the flexible nozzle (2); An external interface (4) threadedly connected to the outer wall of the nozzle sleeve (3); Wherein the end of the flexible nozzle (2) is turned outwards and fits against the end face of the nozzle sleeve (3), and is tightly arranged between the nozzle sleeve (3) and the external interface (4); A circular groove (6) is provided on the outer wall of the end of the nozzle sleeve (3), and the end of the flexible nozzle (2) is further turned outwards and embedded in the circular groove (6); The end face position of the nozzle sleeve (3) is provided with an arc-shaped chamfer; A sealing groove (7) is provided on the bottom wall of the circular groove (6), and a sealing ring (8) for embedding in the sealing groove (7) is provided on the outer side wall of the flexible nozzle (2); The nozzle sleeve (3) is threadedly connected to the flexible nozzle (2).

2. The sealing structure for the nozzle of a thin-walled metal gas cylinder according to claim 1, characterized in that: The position of the sealing ring (8) on the flexible nozzle (2) is formed by an internal and external compression method.

3. The sealing structure for the nozzle of a thin-walled metal gas cylinder according to claim 2, characterized in that: The threaded connection position of the flexible nozzle (2) is formed by an internal and external compression method.

4. The sealing structure for the nozzle of a thin-walled metal gas cylinder according to claim 1, characterized in that: An outer edge (5) fitting against the surface of the metal inner container (1) is extended on the nozzle sleeve (3).

5. The sealing structure for the nozzle of a thin-walled metal gas cylinder according to claim 1, characterized in that: Both the metal inner container (1) and the flexible nozzle (2) are thin-walled structures with the same thickness.

6. The sealing structure for the nozzle of a thin-walled metal gas cylinder according to claim 5, characterized in that: The thickness of the metal inner container (1) and the flexible nozzle (2) is less than 2 mm.

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