CN216201307U - Fatigue-resistant air conditioner metal hose - Google Patents
Fatigue-resistant air conditioner metal hose Download PDFInfo
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- CN216201307U CN216201307U CN202122390998.9U CN202122390998U CN216201307U CN 216201307 U CN216201307 U CN 216201307U CN 202122390998 U CN202122390998 U CN 202122390998U CN 216201307 U CN216201307 U CN 216201307U
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Abstract
The utility model relates to a fatigue-resistant air conditioner metal hose, and belongs to the technical field of air conditioner pipelines. The flexible pipe is divided into a flexible section and connecting sections positioned at two ends of the flexible section, the flexible section is composed of an inner-layer metal corrugated flexible pipe and an outer-layer metal net sleeve covering the metal corrugated flexible pipe, and the connecting sections comprise connecting pipes, sealing joints and nuts which are far away from the flexible section; one end of the connecting pipe, which is attached to the corrugated metal hose, forms a first step with a large diameter and a small diameter, and the other end of the connecting pipe is fixed with one end of the sealing joint; the other end of the sealing joint is inserted into a nut and fixed; a concentric different-diameter metal pipe is sleeved outside the joint of the connecting pipe and the metal corrugated hose, and a second step with the large diameter and the small diameter matched with the first step is formed in the concentric different-diameter metal pipe; one part of the concentric different-diameter metal pipe, which is positioned on the large-diameter side of the concentric different-diameter metal pipe, is flatly sleeved and pressed on the outer surface of the metal net sleeve, and the rest part of the concentric different-diameter metal pipe is pressed on the outer surface of the connecting pipe; the welding seams between the small-diameter side end of the concentric different-diameter metal pipe and the outer surfaces of the metal net sleeve and the connecting pipe and the butt welding seams between the metal corrugated pipe and the connecting pipe are staggered at a distance. Therefore, the flexible section is not affected by welding heat, the vibration fatigue resistance of the end part of the flexible section is improved, the vibration fatigue resistance and the displacement bearing performance of the whole air conditioner metal hose are obviously improved, and the whole service life is obviously prolonged.
Description
Technical Field
The utility model relates to a metal hose for an air conditioner, and belongs to the technical field of air conditioner pipelines.
Background
The automobile air conditioner metal hose is used as an important connecting piece commonly used for air conditioner pipelines of buses, trailers and refrigerated vehicles, is used for connecting parts and pipelines such as an inlet and an outlet of an air conditioner compressor, a condenser, an evaporator and the like, and plays important roles of compensating installation deviation, absorbing vibration, resisting road jolt, bearing composite working conditions such as high temperature, high pressure, low temperature and low pressure and the like while transmitting media.
To the best of the applicant's knowledge, in the past, automotive air conditioners have mainly used rubber hoses which are prone to failure and leakage due to high temperature aging and low temperature brittleness problems. The compressor rotor causes high-frequency low-amplitude vibration and the compressor base can generate low-frequency high-amplitude vibration, the air conditioning system generates composite vibration, the metal hose is required to continuously bear and absorb the vibration, and the corrugated pipe is easy to fatigue and damage after a certain age, so that leakage is caused. In recent years, the commercial automobile market has more and more strong demand for spare and spare parts without defects and maintenance, which puts higher demands on the metal hose of the automobile air conditioner.
The metal hose for the air conditioner needs to bear the vibration of an air conditioner compressor, the vibration and displacement of a base of the compressor, high pressure, high temperature and low temperature and other composite working conditions. In particular to the phenomena of fatigue cracking and steel wire fracture of the net cover on the metal corrugated hose at the connecting part of the flexible section and the rigid section.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: the metal hose for the air conditioner can bear the vibration of the air conditioner compressor, the vibration and displacement of the compressor base, high pressure, high temperature and low temperature and other composite working conditions for a long time without fatigue cracking of the metal corrugated hose and breaking of the net sleeve.
The technical scheme provided by the utility model for solving the technical problems is as follows: a metal hose for a fatigue-resistant air conditioner is divided into a flexible section and connecting sections positioned at two ends of the flexible section, wherein the flexible section is composed of an inner-layer metal corrugated hose and an outer-layer metal mesh sleeve covering the metal corrugated hose, and the connecting sections comprise connecting pipes, sealing joints and nuts which are far away from the flexible section from the near side; one end of the connecting pipe, which is close to the corrugated metal hose, forms a first step with a large diameter and a small diameter, and the other end of the connecting pipe is fixed with one end of the sealing joint; the other end of the sealing joint is inserted into a nut and fixed; a concentric different-diameter metal pipe is sleeved outside the joint of the connecting pipe and the metal corrugated hose, and the concentric different-diameter metal pipe is provided with a second step with a large diameter and a small diameter which are matched with the first step in shape; the metal mesh sleeve is provided with a third step with a large diameter and a small diameter matched with the shape of the first step, and the third step is positioned between the first step and the second step; the metal net sleeve extends from the large-diameter side of the concentric different-diameter metal pipe, is clamped between the inner surface of the concentric different-diameter metal pipe and the outer surface of the adapter pipe and extends to one end of the small-diameter side of the concentric different-diameter metal pipe, and is pressed and covered on the outer surface of the adapter pipe after being pressed and covered by the concentric different-diameter metal pipe; a first welding seam is formed at one end of the small diameter side of the concentric different-diameter metal pipe, the extending end of the metal net sleeve and the outer surface of the connecting pipe, a second welding seam is formed at the joint of the corrugated metal hose and the connecting pipe, and the first welding seam and the second welding seam are staggered and separated by a distance a; the second welding seam and one end of the large-diameter side of the concentric metal pipe are staggered and separated by a distance b.
Further, the distance a is 15 to 35 mm, and the distance b is 10 to 20 mm.
Further, the metal corrugated hose is an annular dense wave metal corrugated pipe; and the other end of the connecting pipe and one end of the sealing joint are in butt welding to form a third welding seam.
Further, the large-diameter side of the connecting pipe is consistent with the outer diameter of the metal corrugated hose; the other end of the connecting pipe is the same as one end of the sealing joint in outer diameter.
Further, the wave form of the metal corrugated hose is S-shaped or omega-shaped, and the ratio of the wave pitch to the inner diameter reaches the dense wave level.
The utility model has the beneficial effects that:
1) because the concentric different-diameter metal pipe is adopted to replace the conventional metal buckling pipe and forms a matched step shape with the connecting pipe, the welding seam of the small end of the concentric different-diameter metal pipe and the metal net sleeve and the butt welding seam of the metal corrugated pipe and the connecting pipe are staggered with each other and separated by a longer distance, the welding heat influence (damage) caused by the approach of the two welding seams to the steel wire of the metal net sleeve and the metal corrugated pipe at the flexible section part can be avoided, the structural strength of the metal net sleeve and the metal corrugated pipe is increased, and the service life of the metal net sleeve and the metal corrugated pipe is prolonged.
2) The metal net sleeve can be fixed more firmly by utilizing the nested structure of the inner wall of the concentric reducing metal pipe and the connecting pipe; the metal mesh sleeve is extended and welded on the connecting pipe, so that the risk of pulling off the metal mesh sleeve under the working conditions of continuous vibration and bending motion can be avoided.
3) The annular dense wave metal corrugated pipe is adopted to replace a common annular corrugated metal pipe, so that the overall rigidity of the air conditioner metal hose can be reduced, and the vibration fatigue and bending fatigue life of the air conditioner metal hose can be prolonged.
Drawings
The utility model will be further explained with reference to the drawings.
Fig. 1 is a schematic structural diagram of a fatigue-resistant air-conditioning metal hose according to an embodiment of the utility model.
Fig. 2 is a partially enlarged schematic view of fig. 1.
Detailed Description
Example one
A fatigue-resistant air-conditioning metal hose of the present embodiment is shown in fig. 1, and is divided into a flexible segment 1 and connection segments 2 located at two ends of the flexible segment 1. The flexible section 1 is composed of an inner layer metal corrugated hose 5 and an outer layer metal net sleeve 6 covering the metal corrugated hose 5, and the connecting section comprises a connecting pipe 3, a sealing joint 8 and a nut 7 which are far away from the flexible section 1 from near to far.
As shown in fig. 2, one end of the adapter tube 3, which is close to the corrugated metal hose 5, forms a first step with a large diameter and a small diameter, and the large diameter side of the adapter tube 3, which is close to the corrugated metal hose 5, is consistent with the outer diameter of the corrugated metal hose 5; the outer diameter of the other end of the connecting pipe 3 is the same as that of one end of the sealing joint 8; the other end of the sealing joint 8 is inserted into the nut 7 and fixed. A concentric different-diameter metal pipe 4 is sleeved outside the joint of the connecting pipe 3 and the metal corrugated hose 5, a second step with a large diameter and a small diameter matched with the shape of the first step is formed on the concentric different-diameter metal pipe 4, a third step with a large diameter and a small diameter matched with the shape of the first step is formed on the metal net sleeve 6, and the third step is positioned between the first step and the second step. The metal net sleeve 6 extends into the space between the inner surface of the concentric different-diameter metal pipe 4 and the outer surface of the adapter tube from the large-diameter side of the concentric different-diameter metal pipe 4 and extends to one end of the small-diameter side of the concentric different-diameter metal pipe 4, and the concentric different-diameter metal pipe 4 is pressed on the outer surface of the adapter tube 3 after pressing the metal net sleeve 6 which extends into the concentric different-diameter metal pipe; a first welding seam 9 is formed at one end of the small diameter side of the concentric different-diameter metal pipe 4, the extending end of the metal net sleeve 6 and the outer surface of the connecting pipe 3 (the end of the small diameter side of the concentric different-diameter metal pipe 4 is respectively welded with the extending end of the metal net sleeve 6 and the outer surface of the connecting pipe 3), a second welding seam 10 is formed at the butt joint of the metal corrugated hose and the connecting pipe, and the first welding seam 9 and the second welding seam 10 are staggered with each other and separated by a distance a; the second welded joint 10 and the large-diameter side end of the concentric metal tube 4 are offset from each other by a distance b. Typically, the distance a is 15-35 mm and the distance b is 10-20 mm.
The adapter 3, the sealing joint 8 and the nut 7 are generally made of metal materials. The metal corrugated hose 5 is made into an annular dense wave metal corrugated pipe by adopting stainless steel and is butt-welded with the connecting pipe 3 into a whole; the other end of the connecting pipe 3 is butt-welded with one end of the sealing joint 8 into a whole. The concentric different-diameter metal pipe 4 is made of stainless steel materials, the wave form of the metal corrugated hose 5 is S-shaped or omega-shaped, and the ratio of the wave pitch to the inner diameter reaches the dense wave level.
When the anti-fatigue air-conditioning pipeline system is used, the nuts 7 at the two ends of the anti-fatigue air-conditioning metal hose are screwed and connected with the connector (with the O-shaped ring) on any section of pipeline of the vehicle air-conditioning pipeline system, so that reliable sealing can be realized, and the effects of compensating installation deviation, absorbing shock and bearing the high-low pressure and high-low temperature composite working condition of the air-conditioning compressor can be achieved. Meanwhile, the metal corrugated hose 5 obtains lower rigidity by utilizing an S-shaped annular dense wave (the ratio of the wave pitch to the inner diameter is less than or equal to 12.5%), the metal mesh sleeve and a plurality of corrugations at the end part of the flexible section 1 are better protected by utilizing the concentric different-diameter metal pipe 4, and the metal mesh sleeve 6 can be more firmly fixed by utilizing a nested buckling structure formed by the concentric different-diameter metal pipe 4 and the adapter pipe 3. The fatigue-resistant air conditioner metal hose can be used for a long time in a wider frequency range and even under the working condition of large-amplitude air conditioner vibration, and particularly can resist external stress generated during bending installation, so that the fatigue-resistant air conditioner metal hose is ensured to be used safely and reliably for a long time. Practice proves that the vibration fatigue life can be prolonged by several times.
The present invention is not limited to the above embodiments, and any technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of the present invention.
Claims (5)
1. A fatigue-resistant air conditioner metal hose is divided into a flexible section and connecting sections positioned at two ends of the flexible section, wherein the flexible section is composed of an inner metal corrugated hose and an outer metal mesh covering the metal corrugated hose, and the connecting sections comprise connecting pipes, sealing joints and nuts which are far away from the flexible section from the near to the far; the method is characterized in that: one end of the connecting pipe, which is close to the corrugated metal hose, forms a first step with a large diameter and a small diameter, and the other end of the connecting pipe is fixed with one end of the sealing joint; the other end of the sealing joint is inserted into a nut and fixed; a concentric different-diameter metal pipe is sleeved outside the joint of the connecting pipe and the metal corrugated hose, the concentric different-diameter metal pipe is provided with a second step with a large diameter and a small diameter which are matched with the first step in shape, the metal net sleeve is provided with a third step with a large diameter and a small diameter which are matched with the first step in shape, and the third step is positioned between the first step and the second step; the metal net sleeve extends from the large-diameter side of the concentric different-diameter metal pipe, is clamped between the inner surface of the concentric different-diameter metal pipe and the outer surface of the adapter pipe and extends to one end of the small-diameter side of the concentric different-diameter metal pipe, and is pressed and covered on the outer surface of the adapter pipe after being pressed and covered by the concentric different-diameter metal pipe; a first welding seam is formed at one end of the small diameter side of the concentric different-diameter metal pipe, the extending end of the metal net sleeve and the outer surface of the connecting pipe, a second welding seam is formed at the joint of the corrugated metal hose and the connecting pipe, and the first welding seam and the second welding seam are staggered and separated by a distance a; the second welding seam and one end of the large-diameter side of the concentric metal pipe are staggered and separated by a distance b.
2. The fatigue-resistant air conditioning metal hose of claim 1, wherein: the distance a is 15-35 mm and the distance b is 10-20 mm.
3. The fatigue-resistant air-conditioning metal hose as claimed in claim 1 or 2, wherein: the metal corrugated hose is an annular dense wave metal corrugated pipe; and the other end of the connecting pipe and one end of the sealing joint are in butt welding to form a third welding seam.
4. The fatigue-resistant air-conditioning metal hose as claimed in claim 1 or 2, wherein: the large-diameter side of the connecting pipe is consistent with the outer diameter of the metal corrugated hose; the other end of the connecting pipe is the same as one end of the sealing joint in outer diameter.
5. The fatigue-resistant air conditioning metal hose of claim 3, wherein: the wave form of the metal corrugated hose is S-shaped or omega-shaped, and the ratio of the wave pitch to the inner diameter reaches the dense wave level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122390998.9U CN216201307U (en) | 2021-09-29 | 2021-09-29 | Fatigue-resistant air conditioner metal hose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122390998.9U CN216201307U (en) | 2021-09-29 | 2021-09-29 | Fatigue-resistant air conditioner metal hose |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216201307U true CN216201307U (en) | 2022-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122390998.9U Active CN216201307U (en) | 2021-09-29 | 2021-09-29 | Fatigue-resistant air conditioner metal hose |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216201307U (en) |
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2021
- 2021-09-29 CN CN202122390998.9U patent/CN216201307U/en active Active
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