CN204027402U - A kind of high withstand voltage inner screw thread copper pipe - Google Patents
A kind of high withstand voltage inner screw thread copper pipe Download PDFInfo
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- CN204027402U CN204027402U CN201420404978.XU CN201420404978U CN204027402U CN 204027402 U CN204027402 U CN 204027402U CN 201420404978 U CN201420404978 U CN 201420404978U CN 204027402 U CN204027402 U CN 204027402U
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Abstract
A high withstand voltage inner screw thread copper pipe, described copper pipe inner surface is evenly provided with screw thread, it is characterized in that, described copper pipe wall thickness d is 0.25 ~ 0.27mm, outer diameter D is 8.96～9.52mm, and maximum working pressure is 2.5～2.7MPa, reaches the requirement of novel refrigerant R410A minimum operating pressure 2.4MPa.The utility model has been selected suitable external diameter and wall thickness, and wall thickness is 0.26～0.28 with the ratio of external diameter.Prepared inner screw thread copper pipe compared with prior art, operating pressure exceedes 2.4MPa, is up to 2.62MPa, can meet the minimum operating pressure of R410A, can realize that long-term work under the working condition of R410A refrigerant is not leaked, indeformable, not explosion, conductivity of heat is better; In the time of bend pipe, the interior outside of tube wall all can reach requirement, is not easy to occur secretly splitting or wrinkling.
Description
Technical field
The utility model relates to a kind of inner screw thread copper pipe, especially a kind of high withstand voltage inner screw thread copper pipe.
Background technology
Copper pipe is the preferred material of Refrigeration & Air-Conditioning industry heat exchanger tube always, correlation technique is also at development, be 0.21mm～0.23mm as disclosed a kind of height of teeth top in the patent No. Chinese utility model patent " the ultra-thin tall and thin teeth internal screwed copper tube of Φ 7mm large helix angle " that is 201020563100.2, addendum angle is 15 °～20 °, copper pipe wall thickness is 0.18mm～0.22mm, helixangleβ is the inner screw thread copper pipe of 21 °～25 °, this copper pipe wall is thin, there is good heat transfer effect, this technology has also represented a kind of trend of inner screw thread copper pipe development in recent years, it is the continuous attenuate of wall thickness of inner screw thread copper pipe, although the thinner heat-transfer effect of wall thickness is better, but cross thin meeting and weaken the intensity of tubing and the stability of tooth.
In addition, along with the further raising of refrigeration plant heat transfer efficiency, especially, in the time being applied to the indoor set of refrigerated medium R410A, the pressure ratio R22's of its refrigeration system is high 1.6 times, and for improving security reliability, inner screw thread copper pipe need have higher resistance to pressure.Do not leak in order to reach long-term work under the operating pressure of R410A refrigerant, indeformable, requirement that more can not explosion, and there is good conductivity of heat, need to consider wall thickness, external diameter size and the tensile strength of inner screw thread copper pipe, just can make it have higher resistance to pressure and burst pressure.
At present, only have 2.35～2.38MPa with the operating pressure that the similar inner screw thread copper pipe maximum of the utility model is born, do not reach the requirement of environmental protection refrigerant R410A minimum operating pressure 2.4MPa; And in the time that inner screw thread copper pipe is subject to pulling force bend pipe, the stressed attenuate of outside tube wall, is prone to secretly and splits, and causes leakage; Inner side tube wall is stressed and thickens, and creases easily, and affects heat transfer property.
Summary of the invention
For deficiency of the prior art, the utility model provides a kind of high withstand voltage inner screw thread copper pipe.
The utility model is achieved through the following technical solutions: a kind of high withstand voltage inner screw thread copper pipe, described copper pipe inner surface is evenly provided with screw thread, it is characterized in that: described inner screw thread copper pipe wall thickness d is 0.25 ~ 0.27 mm, and outer diameter D is 8.96～9.52 mm, and maximum working pressure is 2.5～2.7 MPa.。
A kind of high withstand voltage inner screw thread copper pipe of the present utility model has suitable wall thickness and external diameter, and wall thickness is 0.26～0.28 with the ratio of external diameter, reaches the requirement of novel refrigerant R410A minimum operating pressure 2.4MPa.
As preferably, described inner screw thread copper pipe is at bend pipe during to U-shaped, and outboard tube wall thickness d1 is 0.18 ~ 0.22 mm, and inside tube wall thickness d2 is 0.30-0.33 mm.
As preferably, the tooth bar number on described copper pipe inner surface is 65～70, and addendum angle α is 15 °～17 °, and tooth depth H is 0.20～0.25mm, and helixangleβ is 25 °～30 °.
The prepared inner screw thread copper pipe of the utility model compared with prior art, there is following beneficial effect: compared with same item inner screw thread copper pipe, operating pressure exceedes 2.4MPa, be up to 2.7MPa, can meet the minimum operating pressure of R410A, can realize that long-term work under the working condition of R410A refrigerant is not leaked, indeformable, not explosion, conductivity of heat is better; In the U-shaped knee of inner screw thread copper pipe, outside all can reach requirement, is not easy to occur secretly splitting or wrinkling.
Brief description of the drawings
Fig. 1 is inner screw thread copper pipe part sectioned view of the present utility model.
Fig. 2 is cross section partial enlarged drawing of the present utility model.
Fig. 3 is the utility model bend pipe U-shaped cross section enlarged drawing.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the utility model is further described.
See Fig. 1 and Fig. 2, a kind of high withstand voltage inner screw thread copper pipe, described copper pipe inner surface is evenly provided with screw thread, described formation profile of tooth 1 and teeth groove 2, described copper pipe wall thickness d is 0.25 ~ 0.27 mm, outer diameter D is 8.96～9.52 mm.The helixangleβ of described copper pipe is 25 °～30 °, the U-shaped bending place of described copper pipe, and outboard tube wall thickness d1 is 0.18 ~ 0.22 mm, inside tube wall thickness d2 is 0.30-0.33 mm.Tooth bar number on described copper pipe inner surface is 65～70, and addendum angle α is 15 °～17 °, and tooth depth H is 0.20～0.25mm.
In present embodiment, described copper pipe material is TP2(phosphorized copper), wall thickness d is 0.27 mm, outer diameter D is 9.52 mm, and helixangleβ is 30 °, and the arc radius R1 of the transition joint face of profile of tooth 1 is 0.08mm, the arc radius R2 of teeth groove 2 bottoms is 0.04 mm, this suitable arc radius can ensure that profile of tooth 1 has good intensity, and broken teeth phenomenon can not occur in the course of work, can not reduce the heat transfer property of copper pipe simultaneously.The U-shaped bending place of copper pipe, outboard tube wall thickness d1 is 0.22 mm, and inside tube wall thickness d2 is 0.33 mm, and tooth bar number is 65, addendum angle α is 15 °, tooth depth H is 0.20mm, and the copper pipe of present embodiment, in preparation process, is 520 °～420 ° by controlling annealing temperature, annealing time is 72 minutes, temperature retention time is 240 minutes, can further improve the intensity that makes inner screw thread copper pipe, and in bend pipe process, intensity reaches 235 ~ 250MPa.
The copper pipe water pressure test maximum working pressure of present embodiment is 2.7 MPa, can meet the requirement of the R410A of environmental protection new cooling media minimum operating pressure, is not easy appearance and secretly splits and leak, and inner side tube wall is stressed while thickening, not because of the wrinkling heat transfer property that affects.
Claims (3)
1. a high withstand voltage inner screw thread copper pipe, described copper pipe inner surface is evenly provided with screw thread, it is characterized in that, and described copper pipe wall thickness d is 0.25 ~ 0.27 mm, and outer diameter D is 8.96～9.52 mm, and maximum working pressure is 2.5～2.7 MPa.
2. a kind of high withstand voltage inner screw thread copper pipe according to claim 1, is characterized in that, described inner screw thread copper pipe is at bend pipe during to U-shaped, and outboard tube wall thickness d1 is 0.18 ~ 0.22 mm, and inside tube wall thickness d2 is 0.30-0.33 mm.
3. a kind of high withstand voltage inner screw thread copper pipe according to claim 1 and 2, it is characterized in that, the tooth bar number on described copper pipe inner surface is 65～70, and addendum angle α is 15 °～17 °, tooth depth H is 0.20～0.25mm, and the helixangleβ of copper pipe is 25 °～30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420404978.XU CN204027402U (en) | 2014-07-22 | 2014-07-22 | A kind of high withstand voltage inner screw thread copper pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420404978.XU CN204027402U (en) | 2014-07-22 | 2014-07-22 | A kind of high withstand voltage inner screw thread copper pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204027402U true CN204027402U (en) | 2014-12-17 |
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| CN201420404978.XU Active CN204027402U (en) | 2014-07-22 | 2014-07-22 | A kind of high withstand voltage inner screw thread copper pipe |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104654885A (en) * | 2014-12-30 | 2015-05-27 | 浙江耐乐铜业有限公司 | Heat exchange copper pipe structure |
| CN104654884A (en) * | 2014-12-30 | 2015-05-27 | 浙江耐乐铜业有限公司 | Internal threaded copper pipe structure |
| WO2021057916A1 (en) * | 2019-09-27 | 2021-04-01 | 约克（无锡）空调冷冻设备有限公司 | Heat exchange pipe, heat exchanger and air conditioning system using heat exchanger |
-
2014
- 2014-07-22 CN CN201420404978.XU patent/CN204027402U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104654885A (en) * | 2014-12-30 | 2015-05-27 | 浙江耐乐铜业有限公司 | Heat exchange copper pipe structure |
| CN104654884A (en) * | 2014-12-30 | 2015-05-27 | 浙江耐乐铜业有限公司 | Internal threaded copper pipe structure |
| CN104654884B (en) * | 2014-12-30 | 2016-08-24 | 浙江耐乐铜业有限公司 | A kind of inner screw thread copper pipe structure |
| CN104654885B (en) * | 2014-12-30 | 2016-08-24 | 浙江耐乐铜业有限公司 | A kind of heat exchanging copper pipe structure |
| WO2021057916A1 (en) * | 2019-09-27 | 2021-04-01 | 约克（无锡）空调冷冻设备有限公司 | Heat exchange pipe, heat exchanger and air conditioning system using heat exchanger |
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