High-pressure air pipe connecting structure

Abstract

The utility model mainly relates to the technical field of ultrahigh-pressure gas transmission, in particular to a connecting structure of an ultrahigh-pressure gas pipe. The high-pressure air pipe connecting structure comprises a first pipe body, a second pipe body and a connecting sleeve, a first conical surface is formed at the connecting end of the first pipe body, and a first connecting assembly is further arranged at the connecting end of the first pipe body; a second conical face is formed at the connecting end of the second pipe body, and a second connecting assembly is further arranged at the connecting end of the second pipe body. The connecting sleeve comprises a first sleeving end and a second sleeving end. The connector is inserted into the connector nuts, the two connector nuts are rotated outwards, so that the first pipe body and the second pipe body are pulled to be tensioned in the connector direction, meanwhile, the situation that reverse torque drives the connector on the other side to rotate through the connecting sleeve can be avoided, the first pipe body, the second pipe body and the high-pressure air pipe are sealed through the metal gaskets, and the air tightness of the structure is guaranteed.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of ultra-high pressure gas transmission, in particular to a high pressure gas pipe connection structure. Background Art

[0002] At present, in ultra-high pressure gas transmission pipelines, the connection between different pipelines is usually welded, but this connection method directly fixes the two gas pipes. When one of the gas pipes is to be tightened with the connector, it is easy to transmit the torque to the other gas pipe due to torque transmission. When one end is tightened, the other end is just in the direction of loosening, affecting the close fit between the other gas pipe and the connector, and may even cause the other gas pipe and the connector to loosen and cause leakage. At the same time, the technical requirements for pipeline welding are very high when this method is used, especially if the pipeline is used in a high-pressure hydrogen environment. If a tiny welding slag is not completely cleaned, it may fall into the pipeline after a long period of high-pressure hydrogen flushing, thereby causing irreparable damage to the pipeline and ultimately leading to a safety accident.

[0003] Therefore, it is necessary to provide an ultra-high pressure hydrogen pipeline connector with strong sealing performance and without the need for welding to connect the pipeline, so as to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a high-pressure gas pipe connection structure to solve the problem that the technical requirements for pipeline welding are very high when two gas pipes are fixed by welding, especially if the pipeline is used in a high-pressure hydrogen use environment. If a tiny welding slag is not completely cleaned, it may fall into the pipeline after a long period of high-pressure hydrogen flushing, thereby causing irreparable damage to the pipeline and ultimately leading to the problem of safety accidents.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions: a high-pressure gas pipe connection structure, including a first pipe body and a second pipe body, and also including a connection sleeve;

[0006] The connecting end of the first tube body is formed with a first conical surface, and the connecting end of the first tube body is also provided with a first connecting component;

[0007] The connecting end of the second tube body is formed with a second tapered surface, and the connecting end of the second tube body is also provided with a second connecting assembly;

[0008] The connecting sleeve comprises a first sleeve end and a second sleeve end, and a connecting through hole is arranged between the first sleeve end and the second sleeve end.

[0009] In a preferred embodiment of the utility model, the first connecting component and the second connecting component include a connecting nut and a connecting ring, the connecting end of the first tube body and the connecting end of the second tube body both have external threads, and the connecting ring is provided with an internal thread. The connecting rings are respectively sleeved and fixed on the connecting end of the first tube body and the connecting end of the second tube body, and the connecting nuts are respectively abutted against one end of the connecting ring away from the first conical surface and the second conical surface.

[0010] In a preferred embodiment of the utility model, the first sleeve end and the second sleeve end are both provided with internal threads, the connecting nut is provided with external threads, the connecting nut is respectively sleeved on the first tube body and the second tube body, and is respectively locked with the first sleeve end and the second sleeve end.

[0011] In a preferred embodiment of the present invention, the diameter of the first tube body is greater than the diameter of the second tube body, and the aperture of the first sleeve end is greater than the aperture of the second sleeve end.

[0012] In a preferred embodiment of the present invention, both ends of the connecting through hole are provided with funnel slopes matching the first conical surface and the second conical surface.

[0013] In a preferred embodiment of the present invention, the connecting sleeve is of an external hexagonal configuration.

[0014] In a preferred embodiment of the utility model, it also includes a connecting head, a metal gasket, and a joint nut. The other end of the first tube body and the second tube body relative to the connecting end is a connecting head end. The connecting head ends of the first tube body and the second tube body are respectively connected to the connecting head and the joint nut. The metal gasket is arranged between the connecting head and the joint nut.

[0015] In a preferred embodiment of the utility model, the outer diameter of the connecting head end is provided with an annular fixing portion, and the inside of the joint nut is provided with a supporting portion, the annular fixing portion is sleeved on the supporting portion inside the joint nut, and the joint nut is threadedly connected to the connecting head.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] 1. By inserting the connector into the joint nut and rotating the two joint nuts outward, the first tube body and the second tube body are pulled tight toward the joint direction, and at the same time, the reverse torque can be prevented from driving the joint on the other side to rotate through the connecting sleeve. The metal gasket seals the first tube body, the second tube body and the high-pressure gas pipe to ensure the airtightness of the structure.

[0018] 2. Turn the joint nut inward to disconnect the connector from the joint nut, so that repeated disassembly can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the high-pressure air pipe connection structure of the utility model.

[0020] Figure 2 It is a three-dimensional exploded structural schematic diagram of the first tube body, metal gasket and joint nut of the present invention.

[0021] Figure 3 It is a three-dimensional cross-sectional structural schematic diagram of the second tube body, the connecting sleeve and the connecting ring of the utility model.

[0022] Figure 4 It is a three-dimensional cross-sectional structural schematic diagram of the connecting nut and the connecting ring of the utility model.

[0023] Figure 5 It is a three-dimensional cross-sectional structural schematic diagram of the connecting sleeve of the utility model.

[0024] Among them, the above-mentioned drawings include the following figure marks: 1. first tube body, 2. second tube body, 3. first connecting component, 4. second connecting component, 5. connecting sleeve, 6. first conical surface, 7. first sleeve end, 8. second sleeve end, 9. second conical surface, 10. connecting through hole, 11. connecting nut, 12. connecting ring, 13. connecting head, 14. metal gasket, 15. connecting nut. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Example 1

[0027] A high pressure gas pipe connection structure, see Figure 1-Figure 5 As shown, it includes a first tube body 1, a second tube body 2 and a connecting sleeve 5, and also includes a connecting sleeve 5, the connecting sleeve 5 is an outer hexagonal configuration, the connecting end of the first tube body 1 is formed with a first conical surface 6, and the connecting end of the first tube body 1 is also provided with a first connecting component 3, the connecting end of the second tube body 2 is formed with a second conical surface 9, and the connecting end of the second tube body 2 is also provided with a second connecting component 4, the connecting sleeve 5 includes a first sleeve end 7 and a second sleeve end 8, the diameter of the first tube body 1 is larger than the diameter of the second tube body 2, which is convenient for the first tube body 1 and the second tube body 2. The two tube bodies 2 are distinguished, the pressure in the high-pressure air pipe remains stable, the aperture of the first sleeve end 7 is larger than the aperture of the second sleeve end 8, the first tube body 1 and the second tube body 2 can be accurately connected to the first sleeve end 7 and the second sleeve end 8, a connecting through hole 10 is provided between the first sleeve end 7 and the second sleeve end 8, the through hole 10 is aligned with the center of the first tube body 1 and the second tube body 2, and the resistance of the gas when flowing in this connection structure can be reduced, and funnel slopes matching the first conical surface 6 and the second conical surface 9 are provided at both ends of the connecting through hole 10.

[0028] See also Figure 3 As shown, the first connecting component 3 and the second connecting component 4 include a connecting nut 11 and a connecting ring 12. The connecting end of the first tube body 1 and the connecting end of the second tube body 2 both have external threads, and the connecting ring 12 is provided with an internal thread. The connecting ring 12 is respectively sleeved and fixed on the connecting end of the first tube body 1 and the connecting end of the second tube body 2, and the connecting nut 11 is respectively abutted against one end of the connecting ring 12 away from the first conical surface 6 and the second conical surface 9, so that the connecting nut 11 is tightly fitted with the first tube body 1 and the second tube body 2.

[0029] See also Figure 3 and Figure 5 As shown, the first sleeve end 7 and the second sleeve end 8 are both provided with internal threads, and the connecting nut 11 is provided with external threads. The connecting nut 11 is respectively sleeved on the first tube body 1 and the second tube body 2, and is respectively locked with the first sleeve end 7 and the second sleeve end 8, thereby preventing the first tube body 1 and the second tube body 2 from falling off from the first sleeve end 7 and the second sleeve end 8.

[0030] See also Figure 1 and Figure 2 As shown, it includes a connecting head 13, a metal gasket 14, and a joint nut 15. The other end of the first tube body 1 and the second tube body 2 relative to the connecting end is the connecting head 13 end. The connecting head 13 ends of the first tube body 1 and the second tube body 2 are respectively connected to the connecting head 13 and the joint nut 15, and the metal gasket 14 is arranged between the connecting head 13 and the joint nut 15.

[0031] See also Figure 2 As shown, the outer diameter of the connector 13 is provided with an annular fixing portion, and a bearing portion is provided inside the joint nut 15. The annular fixing portion is sleeved on the bearing portion inside the joint nut 15, and the joint nut 15 is threadedly connected to the connector 13.

[0032] When the present connection structure is to be used, the two connection rings 12 are screwed into the connection ends of the first tube body 1 and the second tube body 2, so that the connection rings 12 are in contact with the connection nut 11, and then the first tube body 1 is aligned with the first sleeve end 7, and the connection sleeve 5 is rotated to screw the connection nut 11 into the first sleeve end 7 until the first conical surface 6 on the first tube body 1 abuts against the first sleeve end 7, so that the first tube body 1 is connected to the connection sleeve 5, and the second tube body 2 is connected to the connection sleeve 5 in the same way, and then the connector 13 is connected to the high-pressure gas pipe, and then the connector 13 is inserted into the joint nut 15, respectively. Rotate the two joint nuts 15 outward to pull the first tube body 1 and the second tube body 2 toward the joint direction, and at the same time avoid the reverse torque from driving the joint on the other side to rotate through the connecting sleeve 5. When the connecting head 13 abuts against the metal gasket 14, stop rotating the joint nut 15. The metal gasket 14 seals the first tube body 1, the second tube body 2 and the high-pressure air pipe to ensure the airtightness of the device. At this time, the two high-pressure air pipes are connected. When the two high-pressure air pipes need to be disconnected, rotate the joint nut 15 inward to disconnect the connecting head 13 and the joint nut 15, thereby achieving repeated disassembly.

[0033] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. A high-pressure air pipe connection structure, characterized in that: It comprises a first tube body (1) and a second tube body (2), Also includes a connecting sleeve (5); The connecting end of the first tube body (1) is formed with a first conical surface (6), and the connecting end of the first tube body (1) is also provided with a first connecting component (3); The connecting end of the second tube body (2) is formed with a second tapered surface (9), and the connecting end of the second tube body (2) is also provided with a second connecting assembly (4); The connecting sleeve (5) comprises a first sleeve end (7) and a second sleeve end (8), and a connecting through hole (10) is provided between the first sleeve end (7) and the second sleeve end (8).

2. A high pressure gas pipe connection structure according to claim 1, characterized in that: The first connecting component (3) and the second connecting component (4) comprise a connecting nut (11) and a connecting ring (12); the connecting end of the first tube (1) and the connecting end of the second tube (2) both have external threads, and the connecting ring (12) is provided with internal threads. The connecting ring (12) is respectively sleeved and fixed on the connecting end of the first tube (1) and the connecting end of the second tube (2); the connecting nut (11) is respectively pressed against one end of the connecting ring (12) away from the first conical surface (6) and the second conical surface (9).

3. A high pressure gas pipe connection structure according to claim 2, characterized in that: The first sleeve end (7) and the second sleeve end (8) are both provided with internal threads, and the connecting nut (11) is provided with external threads. The connecting nut (11) is respectively sleeved on the first tube body (1) and the second tube body (2), and is respectively locked with the first sleeve end (7) and the second sleeve end (8).

4. A high pressure gas pipe connection structure according to claim 1, characterized in that: The diameter of the first tube body (1) is greater than the diameter of the second tube body (2), and the hole diameter of the first sleeve end (7) is greater than the hole diameter of the second sleeve end (8).

5. A high pressure gas pipe connection structure according to claim 4, characterized in that: Funnel slopes matching the first conical surface (6) and the second conical surface (9) are provided at both ends of the connecting through hole (10).

6. A high pressure gas pipe connection structure according to claim 4, characterized in that: The connecting sleeve (5) is of an external hexagonal configuration.

7. A high pressure gas pipe connection structure according to claim 6, characterized in that: It also includes a connector (13), a metal gasket (14), a joint nut (15) and the high-pressure gas pipe connection structure according to any one of claims 1 to 6, wherein the other end of the first tube body (1) and the second tube body (2) relative to the connection end is the connector (13) end, and the connector (13) ends of the first tube body (1) and the second tube body (2) are respectively connected to the connector (13) and the joint nut (15), and the metal gasket (14) is arranged between the connector (13) and the joint nut (15).

8. A high pressure gas pipe connection structure according to claim 7, characterized in that: An annular fixing portion is provided on the outer diameter of the end of the connecting head (13), a supporting portion is provided inside the joint nut (15), the annular fixing portion is sleeved on the supporting portion inside the joint nut (15), and the joint nut (15) is threadedly connected to the connecting head (13).

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