CN102829270A - Method for connecting small-diameter metal pipes - Google Patents
Method for connecting small-diameter metal pipes Download PDFInfo
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- CN102829270A CN102829270A CN2012103379025A CN201210337902A CN102829270A CN 102829270 A CN102829270 A CN 102829270A CN 2012103379025 A CN2012103379025 A CN 2012103379025A CN 201210337902 A CN201210337902 A CN 201210337902A CN 102829270 A CN102829270 A CN 102829270A
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- metal pipe
- metallic conduit
- screw thread
- termination
- pipe collar
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Abstract
The invention relates to a method for connecting small-diameter metal pipes, mainly aiming to solve the problems of high cost and hard sealing of the existing method for connecting the small-diameter metal pipes in the prior art. The method is characterized in that: the end of one metal pipe A (1) needing to the connected is made into a left or right-rotated outer screw thread, the end of the other metal pipe B (2) needing to the connected is made into a right or left-rotated outer screw thread, the processing roughness of the end surfaces of both the two pipes needs to be less than 1.6mum, two ends of a metal pipe hoop (3) are respectively provided with a left-rotated inner screw thread and a right-rotated inner screw thread, and the metal pipe hoop (3) is connected with the metal pipe A (1) and the metal pipe B (2) in a threaded connection way. The method for connecting the small-diameter metal pipes has the advantages of good sealing performance, flexible assembly and disassembly, low cost and convenience of connection, installation and adjustment.
Description
Technical field
The present invention relates to a kind of pipe connecting method, particularly a kind of small diameter metal pipe connecting method.
Background technique
The detachable connecting means of metal current pipeline has flange connection, screwed connection, union connection, socket joint connection, groove to connect; Different connecting means all has its characteristics and Applicable scope separately, and wherein flange connection, screwed connection, union connect the connection that relatively is fit to middle and high pressure small-bore pipeline.Screwed connection has the low characteristics of cost, but is difficult for sealing; Flange connects, union connection (being divided into socket joint union and threaded for union) has characteristics easy to installation and maintenance, but cost is higher relatively.
Summary of the invention
Technical problem to be solved by this invention is to overcome the high and difficult problem that seals of the Placement cost existing commonly used that exists in the background technique; And a kind of small diameter metal pipe connecting method is provided; This small diameter metal pipe connecting method; Good airproof performance, dismounting is flexible, connection is easy to adjust, is fit to the small diameter metal pipeline and connects.
The present invention solves its problem and can reach through following technological scheme: a kind of small diameter metal pipe connecting method; Comprise two metallic conduit A, metallic conduit B that needs connect; Left-handed (or dextrorotation) outer screw thread is processed in the termination of a metallic conduit A who connects; Dextrorotation (or left-handed) outer screw thread is processed in another metallic conduit B termination that needs to connect; The end face processing roughness of two pipelines requires less than 1.6 μ m, and metal pipe collar two ends have left and right sides medial rotation screw thread respectively, adopt thread connecting mode that metal pipe collar and two metallic conduits are coupled together.
Described metallic conduit A, metallic conduit B and metal pipe collar joint add sealing gasket; The material of described sealing gasket is any of iron, aluminium, copper, rubber, teflon, plastics.
Left-handed (or dextrorotation) outer screw thread is processed after processing chamfering in the termination of described metallic conduit A; Dextrorotation (or left-handed) outer screw thread is processed in another metallic conduit B termination that needs to connect; The end face processing roughness of two metallic conduits requires less than 1.6 μ m; Metal pipe collar two ends have left and right sides medial rotation screw thread respectively, adopt thread connecting mode that metal pipe collar and two metallic conduits are coupled together.
Short silk A of the termination welding of the described metallic conduit A that will connect; Short silk A is through chamfering and process dextrorotation (or left-handed) outer screw thread; Short silk B of the termination welding of described another metallic conduit B that will connect, short silk B processes left-handed (or dextrorotation) outer screw thread, and the end face processing roughness of two short silks requires less than 1.6 μ m; Metal pipe collar two ends have left and right sides medial rotation screw thread respectively, adopt thread connecting mode that metal pipe collar and two short silks are coupled together.
The termination chamfering scope of described metallic conduit A and short silk A is 20-80 °.
The present invention and above-mentioned background compared with techniques can have following beneficial effect: this small diameter metal pipe connecting method connects through positive left-hand thread pipe collar, through rotating positive left-hand thread pipe collar owing to adopt above-mentioned Placement; Pipeline can be adorned easily, tear open, is connected with clip connected with flange, union and compares, and is with low cost; Good airproof performance; Simple to operate, practical, be fit to high pressure small diameter metal pipe connecting method.
Description of drawings:
Accompanying drawing 1 is a linkage structure schematic representation of the present invention;
Accompanying drawing 2 is linkage structure schematic representation of another embodiment of the present invention;
Accompanying drawing 3 is linkage structure schematic representation of the third mode of execution of the present invention;
Accompanying drawing 4 is structural representations of processing the short silk A of chamfering of the present invention;
Among the figure: 1-metallic conduit A, 2-metallic conduit B, 3-metal pipe collar, the short silk of 4-A, the short silk of 5-B, 6-sealing gasket.
Embodiment:
To be described further the present invention below in conjunction with embodiment:
Shown in accompanying drawing 2; A kind of small diameter metal pipe connecting method; Comprise two metallic conduit A1, metallic conduit B2 that needs connect; Left-handed outer screw thread is processed in the termination of a metallic conduit A1 who connects, and the dextrorotation outer screw thread is processed in another metallic conduit B2 termination that needs to connect, and the end face processing roughness of two pipelines requires less than 1.6 μ m; Metal pipe collar 3 two ends have left and right sides medial rotation screw thread respectively, adopt thread connecting mode that metal pipe collar 3 is coupled together with metallic conduit A1, metallic conduit B2.Described metallic conduit A1, metallic conduit B2 and metal pipe collar 3 joints add sealing gasket.The material of described sealing gasket is a teflon.
Shown in accompanying drawing 2; A kind of small diameter metal pipe connecting method; Comprise two metallic conduit A1, metallic conduit B2 that needs connect; The dextrorotation outer screw thread is processed in the termination of a metallic conduit A1 who connects, and left-handed outer screw thread is processed in another metallic conduit B2 termination that needs to connect, and the end face processing roughness of two pipelines requires less than 1.6 μ m; Metal pipe collar 3 two ends have left and right sides medial rotation screw thread respectively, adopt thread connecting mode that metal pipe collar 3 is coupled together with metallic conduit A1, metallic conduit B2.Described metallic conduit A1, metallic conduit B2 and metal pipe collar 3 joints add sealing gasket, and the material of described sealing gasket is an iron.
Shown in accompanying drawing 1; Left-handed outer screw thread is processed after processing chamfering in the termination of described metallic conduit A1; The dextrorotation outer screw thread is processed in another metallic conduit B2 termination that needs to connect; The end face processing roughness of 2 pipelines requires less than 1.6 μ m, and metal pipe collar 3 two ends have left and right sides medial rotation screw thread respectively, adopt thread connecting mode that metal pipe collar 3 is coupled together with metallic conduit A1, metallic conduit B2; Metallic conduit A chamfering is 45 °.Along with tightening of pipe collar, the chamfering end face is extruded distortion, reaches sealing purpose.
Shown in accompanying drawing 1; The dextrorotation outer screw thread is processed after processing chamfering in the termination of described metallic conduit A1; Left-handed outer screw thread is processed in another metallic conduit B2 termination that needs to connect, and the end face processing roughness of 2 pipelines requires less than 1.6 μ m, and metal pipe collar 3 two ends have left and right sides medial rotation screw thread respectively; Adopt thread connecting mode that metal pipe collar 3 is coupled together with metallic conduit A1, metallic conduit B2, metallic conduit A chamfering is 45 °.Along with tightening of pipe collar, the chamfering end face is extruded distortion, reaches sealing purpose.
Like Fig. 3 and Fig. 4 and shown in Figure 5; Short silk A4 of the termination welding of described metallic conduit A1, short silk A4 is through chamfering and process the dextrorotation outer screw thread, short silk B5 of the termination welding of described metallic conduit B2; Short silk B5 processes left-handed outer screw thread; The end face processing roughness of two short silks requires less than 1.6 μ m, and metal pipe collar 3 two ends have left and right sides medial rotation screw thread respectively, adopts thread connecting mode that metal pipe collar 3 is coupled together with short silk A4, short silk B5; Short silk A4 chamfering is 45 °.Along with tightening of pipe collar, the chamfering end face is extruded distortion, reaches sealing purpose.
Embodiment 6
Like Fig. 3 and Fig. 4 and shown in Figure 5; Short silk A4 of the termination welding of described metallic conduit A1, short silk A4 is through chamfering and process left-handed outer screw thread, short silk B5 of the termination welding of described metallic conduit B2; Short silk B5 processes the dextrorotation outer screw thread; The end face processing roughness of two short silks requires less than 1.6 μ m, and metal pipe collar 3 two ends have left and right sides medial rotation screw thread respectively, adopts thread connecting mode that metal pipe collar 3 is coupled together with short silk A4, short silk B5; Short silk A4 chamfering is 45 °.Along with tightening of pipe collar, the chamfering end face is extruded distortion, reaches sealing purpose.
Among the foregoing description 1-6, the metallic conduit of connection is DN25, DN50 pipeline, and the waterpower pressure testing reaches the 40MPa ne-leakage.
Claims (6)
1. small diameter metal pipe connecting method; Comprise two metallic conduit A (1), metallic conduit B (2) that needs connect; It is characterized in that: left-handed (or dextrorotation) outer screw thread is processed in the termination of a metallic conduit A (1) that connect; Dextrorotation (or left-handed) outer screw thread is processed in another metallic conduit B (2) termination that needs to connect; The end face processing roughness of two pipelines requires less than 1.6 μ m, and metal pipe collar (3) two ends have left and right sides medial rotation screw thread respectively, adopt thread connecting mode that metal pipe collar (3) is coupled together with metallic conduit A (1), metallic conduit B (2).
2. a kind of small diameter metal pipe connecting method according to claim 1 is characterized in that: described metallic conduit A (1), metallic conduit B (2) add sealing gasket (6) with metal pipe collar (3) joint.
3. small diameter metal pipe connecting method according to claim 2 is characterized in that: the material of described sealing gasket (6) is any of iron, aluminium, copper, rubber, teflon, plastics.
4. a kind of small diameter metal pipe connecting method according to claim 1; It is characterized in that: left-handed (or dextrorotation) outer screw thread is processed after processing chamfering in the termination of described metallic conduit A (1); Dextrorotation (or left-handed) outer screw thread is processed in another metallic conduit B (2) termination that needs to connect; The end face processing roughness of 2 pipelines requires less than 1.6 μ m; Metal pipe collar (3) two ends have left and right sides medial rotation screw thread respectively, adopt thread connecting mode that metal pipe collar (3) is coupled together with metallic conduit A (1), metallic conduit B (2).
5. a kind of small diameter metal pipe connecting method according to claim 1; It is characterized in that: short silk A (4) of the termination welding of described metallic conduit A (1); Short silk A (4) is through chamfering and process dextrorotation (or left-handed) outer screw thread; Short silk B (5) of the termination welding of described metallic conduit B (2), short silk B (5) processes left-handed (or dextrorotation) outer screw thread, and the end face processing roughness of two short silks requires less than 1.6 μ m; Metal pipe collar (3) two ends have left and right sides medial rotation screw thread respectively, adopt thread connecting mode that metal pipe collar (3) is coupled together with short silk A (4), short silk B (5).
6. according to claim 4 or 5 described a kind of small diameter metal pipe connecting methods, it is characterized in that: the termination chamfering scope of described metallic conduit A (1) and short silk A (4) is 20-80 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103379025A CN102829270A (en) | 2012-09-13 | 2012-09-13 | Method for connecting small-diameter metal pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103379025A CN102829270A (en) | 2012-09-13 | 2012-09-13 | Method for connecting small-diameter metal pipes |
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| Publication Number | Publication Date |
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| CN102829270A true CN102829270A (en) | 2012-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103379025A Pending CN102829270A (en) | 2012-09-13 | 2012-09-13 | Method for connecting small-diameter metal pipes |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104896218A (en) * | 2015-05-19 | 2015-09-09 | 中国重型机械研究院股份公司 | Bimetal composite pipe end connecting device |
| CN105081592A (en) * | 2014-05-14 | 2015-11-25 | 中国石油天然气股份有限公司 | Transpositional-free fire modifying method for natural gas pressure guiding device |
| CN109226541A (en) * | 2018-10-26 | 2019-01-18 | 无锡溥汇机械科技有限公司 | A kind of positive/negative thread formula pipeline connecting device |
| CN112283445A (en) * | 2020-10-26 | 2021-01-29 | 张学昌 | Quick connecting pipe hoop for pipeline construction and construction method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4521042A (en) * | 1983-07-05 | 1985-06-04 | Hydril Company | Threaded connection |
| CN85107996A (en) * | 1984-10-10 | 1986-05-10 | 瓦洛海克股份有限公司 | The screwed joint of steel tube that has the Full Thread FT sealing mechanism |
| CN86106732A (en) * | 1986-10-11 | 1988-04-20 | 瓦洛海克股份有限公司 | Be provided with the screwed joint of steel tube of seal arrangement at helical thread portion |
| CN101836023A (en) * | 2007-10-25 | 2010-09-15 | 布廷恩两合公司 | The connected system that is used for the pipe of double-walled |
-
2012
- 2012-09-13 CN CN2012103379025A patent/CN102829270A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4521042A (en) * | 1983-07-05 | 1985-06-04 | Hydril Company | Threaded connection |
| CN85107996A (en) * | 1984-10-10 | 1986-05-10 | 瓦洛海克股份有限公司 | The screwed joint of steel tube that has the Full Thread FT sealing mechanism |
| CN86106732A (en) * | 1986-10-11 | 1988-04-20 | 瓦洛海克股份有限公司 | Be provided with the screwed joint of steel tube of seal arrangement at helical thread portion |
| CN101836023A (en) * | 2007-10-25 | 2010-09-15 | 布廷恩两合公司 | The connected system that is used for the pipe of double-walled |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105081592A (en) * | 2014-05-14 | 2015-11-25 | 中国石油天然气股份有限公司 | Transpositional-free fire modifying method for natural gas pressure guiding device |
| CN104896218A (en) * | 2015-05-19 | 2015-09-09 | 中国重型机械研究院股份公司 | Bimetal composite pipe end connecting device |
| CN109226541A (en) * | 2018-10-26 | 2019-01-18 | 无锡溥汇机械科技有限公司 | A kind of positive/negative thread formula pipeline connecting device |
| CN112283445A (en) * | 2020-10-26 | 2021-01-29 | 张学昌 | Quick connecting pipe hoop for pipeline construction and construction method thereof |
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Application publication date: 20121219 |