CN1170642A - Double layer roll welded pipe with internal screw groove and its producing method - Google Patents
Double layer roll welded pipe with internal screw groove and its producing method Download PDFInfo
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- CN1170642A CN1170642A CN 96107088 CN96107088A CN1170642A CN 1170642 A CN1170642 A CN 1170642A CN 96107088 CN96107088 CN 96107088 CN 96107088 A CN96107088 A CN 96107088A CN 1170642 A CN1170642 A CN 1170642A
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- roll
- double layer
- welded pipe
- screw groove
- internal screw
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Abstract
The present invention belongs to the field of pressure machining and its main point is that the inner surface of double layer roll welded pipe has spiral groove. Double face copper plated steel belt as material is rolled through two rollers and one roller has spiral line in one length of roller surface corresponding to the inner surface of double layer roll welded pipe. The thread in the said roller has its pitch, depth and lift angle depending on the size of pipe and the property and speed of fluid to be used for. The present invention can raise the heat exchange efficiency of double layer roll welded pipe greatly.
Description
The invention belongs to the pressure processing technology field.
Double coiled welded tube is with the two-sided solder that is coated with--the accurate cold rolling mild-carbon steel strip of-copper is raw material, through edger roll, a series of roll-type forming groups will be with curling 720 ° of steel broad ways (two circles) to become the double coiled welded tube socket, obtain interlayer behind the reducing mill stand of the plug sizing and fit tightly by having outward to have in the size rolls, the double coiled welded tube socket of accurate in size not seam, then socket is heated to solder by special heating furnace--be incubated after the fusion temperature of-copper, cooling, utilize copper as binding agent with two interlayers of double coiled welded tube securely seam become a complete double coiled welded tube together.
Because this tubing has the advantage of a series of uniquenesses, at automobile, tractor industry, refrigeration (as refrigerator) industry has obtained in the industries such as air compressor using widely.
Employed double coiled welded tube all is the smooth double coiled welded tube of surfaces externally and internally in the radiator of refrigerator and air compressor at present.Have to increase the diameter of used tubing or the radical (total length) of increase radiating tube in order to improve the heat exchange effect, even use the steel pipe that involves great expense to make radiator.So not only cause the waste of material, also increased the volume of equipment simultaneously.And in air-conditioner is produced, reduce the volume of air-conditioner simultaneously in order to guarantee the heat exchange effect as far as possible, and the heat exchanger in the air-conditioner all is with the copper pipe manufacturing that involves great expense at present, only will use a large amount of non-ferrous metals---copper every year in the production of air-conditioner.Therefore how improving the heat exchange efficiency with the heat exchanger of double coiled welded tube manufacturing, even make heat exchanger with its alternative copper pipe, is an important research project.
A common characteristic is arranged, be exactly all there is fluid to pass through in the pipe in the use of double coiled welded tube.According to heat transfer principle as can be known, the heat exchange effect of heat exchanger is except outside the Pass the material with employed heat exchanger tube has, also with tube fluid flow regime--there is direct relation in-flow field.When the fluid that flows in the pipe was in laminar condition, transporting of momentum and energy was to transport to another fluid layer by molecule from a fluid layer, carrying simultaneously with the corresponding momentum of speed that flows, and the speed of momentum-exchange depends on the speed of the molecule that crosses fluid layer.When the fluid in the pipe is in turbulence state, the fluid of this moment is at random being stirred, make the motion to and fro on all directions of its each several part, transporting of momentum and energy is that fluid mass by macroscopic view is finished, and the microcosmic of individual molecule transported when this had replaced laminar condition.The fluid mass of macroscopic view has bigger quality, can transport more energy and momentum than single molecule.When turbulence state, total heat conduction amount is molecule heat conduction and macroscopic eddy current heat conduction sum, so its thermal conductivity factor is much bigger during than laminar condition.
For fluid flowing in pipe, be reynolds number Re d as the criterion of distinguishing laminar flow and turbulent flow:
Red=U
m.d/v the kinematic viscosity of v---fluid in the formula;
The internal diameter of d---tubing;
U
m--the average flow velocity of-fluid.
Work as Reynolds number:
Red＞2300 o'clock, observed usually is the turbulent flow state.Can observe by experiment, to turbulence state, the Reynolds number of this transition region has a scope, that is: by laminar condition
2000＜Red＜4000 all may occur the commentaries on classics of flow regime in other words and twist in this interval.Change and to twist that pairing concrete Reynolds number depends on the roughness of used internal surface of pipe and the ride comfort that fluid flows when occurring.When existing strong disturbance in tube fluid is flowing, laminar flow just can occur to turbulent Transition when Reynolds number is low, in other words, the fluid in the pipe is easy to reach turbulence state.
The objective of the invention is to design a kind of manufacture method that has the double coiled welded tube of inner spiral groove and produce this product.The heat exchange efficiency height of the double layer roll welded pipe with internal screw groove of this invention.Only need to change the plug that edger roll in the present common twin-laminate roll welded pipe product line and sizing use and to produce this tubing, so equipment investment is low.This invention not only can be saved a large amount of non-ferrous metal tubing, also can reduce the production cost of the equipment of using this product greatly.
This double layer roll welded pipe with internal screw groove and manufacture method thereof, its manufacture method include edger roll 1,3, size rolls 5,7, compositions such as plug 6 and a series of roll-type forming groups.Its main points are:
A. the inner surface of double layer roll welded pipe with internal screw groove is processed with spiral grooves, and lead angle β is 0 °～90 ° (seeing Fig. 1 and Fig. 2);
B. be processed with helix on the part roll surface of edger roll 1, length ι and the position on edger roll 1 roll surface thereof are corresponding with the inner surface of the double layer roll welded pipe with internal screw groove of manufacturing;
C. being used to make the raw material of double layer roll welded pipe with internal screw groove---two-sided copper-plated band steel 2 is by edger roll 1, the 3 rolling back valley gutter (see figure 4)s that are processed with oblique angle β on the part belt steel surface corresponding to internal surface of pipe, and oblique angle β (0 °～90 °) depends on the size of pipe and tubing specification of manufacturing and character and the flow velocity that tubing is in use managed the interior fluid that is passed through;
D. be with steel through edger roll 1,3 rolling after, through a series of roll-type forming group curling 720 ° of its broad ways (two circles) is become socket again, because the ad-hoc location of belt steel surface has been processed the valley gutter (see figure 4), therefore to have formed lead angle be the spiral grooves of β to the socket that is rolled on the surface within it;
E. with above-mentioned socket by size rolls 5,7 is arranged outward, in the reducing mill stand (see figure 5) sizing of plug 6 is arranged after, can obtain fitting tightly between ectonexine, the double layer roll welded pipe with internal screw groove of accurate in size not seam, then it is heated to solder by special soldering furnace again--insulation after the fusion temperature of-copper, cooling, because the fusing point of parent steel is higher than the fusing point of copper far away, therefore utilize copper as binding agent with two interlayers of socket securely seam become a complete double layer roll welded pipe with internal screw groove together.
This invention is by the spiral grooves of the inner surface of double layer roll welded pipe with internal screw groove, make the interior fluid of pipe when vertically flowing, produce directed rotatablely moving---directed disturbance, thereby reduce fluid from laminar flow to the pairing Reynolds number of turbulent flow turning point, so that fluid is in turbulence state in pipe, thereby improve the heat exchange effect of heat exchanger greatly.Like this, for the equipment of having used now the smooth common double coiled welded tube manufacturing of surfaces externally and internally, under the situation of the dimensions of the tubing that does not change former use, use double layer roll welded pipe with internal screw groove of the present invention can improve the heat exchange effect of heat exchanger greatly; If keep original heat exchange level constant, use double layer roll welded pipe with internal screw groove of the present invention, maybe can reduce the dimensions of tubing, maybe can reduce the total length of used tubing, reduce cost thereby not only can save material, also can make device fabrication get small and exquisite spirit dragon.Make for the equipment of heat exchanger (as air-conditioner) for requiring the heat exchange efficiency height to have to use copper pipe at present, because the heat exchange efficiency height of double layer roll welded pipe with internal screw groove of the present invention, available its instead of copper pipe manufacturer heat exchanger, so not only can save a large amount of non-ferrous metals, also can reduce the cost of equipment simultaneously greatly.
Drawings and Examples:
Fig. 1. the double layer roll welded pipe with internal screw groove schematic cross-sectional view
Fig. 2. double layer roll welded pipe with internal screw groove vertical section schematic diagram
Fig. 3. band steel edging, groove schematic diagram
Fig. 4. one side surface view behind band steel edging, the groove
Fig. 5. socket is at the reducing mill stand schematic diagram
Embodiment:
The concrete parameter of a disclosed embodiment of the present invention is:
The specification of double layer roll welded pipe with internal screw groove: φ 12 * 0.71mm;
The parameter of copper facing band steel: material 08F, single face thickness of coated copper layer 0.004mm, width 72.5mm, thickness 0.35mm;
Spiral grooves parameter: t=1mm, h=0.2mm, s=0.5mm, β=72 °;
Edger roll 1: external diameter φ 114mm, material T10, ι=31.8mm;
Size rolls 5,7: external diameter φ 134mm, material T10;
Plug 6: diameter phi 10.62mm, plating hard chromium on surface and polishing;
Adopt the roll-type forming of 7 big horizontal roller and 5 groups of little horizontal roller (edger roll) group.
Claims (3)
1. double layer roll welded pipe with internal screw groove and manufacture method thereof.It is characterized in that:
A. the inner surface of this tubing is processed with spiral grooves, and lead angle β is 0 °～90 °, and its manufacture method includes edger roll 1,3, size rolls 5,7, compositions such as plug 6 and a series of roll-type forming groups;
B. being used to make the raw material of double layer roll welded pipe with internal screw groove---two-sided copper-plated band steel 2 is rolling by edger roll 1,3;
C. two-sided copper-plated band steel 2 through edger roll 1,3 rolling after, be curled into double layer roll welded pipe with internal screw groove socket 4 by a series of roll-type forming groups;
D. behind the reducing mill stand sizing of socket 4 by size rolls 5,7 and plug 6 compositions, be welded into double layer roll welded pipe with internal screw groove with special heating furnace heating.
2. double layer roll welded pipe with internal screw groove according to claim 1 and manufacture method thereof, it is characterized in that: on the part roll surface of edger roll 1, be processed with helix, length ι and the position on edger roll 1 roll surface thereof are corresponding with the inner surface of the double layer roll welded pipe with internal screw groove of manufacturing, and the pitch t of screw thread, depth of thread h and lead angle depend on the character and the flow velocity of the fluid that the dimensions of tubing of manufacturing and tubing are passed through in managing in use;
3. according to claim 1 and 2 described double layer roll welded pipe with internal screw groove and manufacture methods thereof, it is characterized in that: the size of plug 6 depends on the parameter of spiral grooves on the size of tubing of manufacturing and the pipe internal surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96107088 CN1170642A (en) | 1996-07-17 | 1996-07-17 | Double layer roll welded pipe with internal screw groove and its producing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96107088 CN1170642A (en) | 1996-07-17 | 1996-07-17 | Double layer roll welded pipe with internal screw groove and its producing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1170642A true CN1170642A (en) | 1998-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96107088 Pending CN1170642A (en) | 1996-07-17 | 1996-07-17 | Double layer roll welded pipe with internal screw groove and its producing method |
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| Country | Link |
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| CN (1) | CN1170642A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100376338C (en) * | 2005-11-23 | 2008-03-26 | 何甜灶 | Method and apparatus for producing heterotype tubing using steel plate |
| CN102151725A (en) * | 2011-01-28 | 2011-08-17 | 湖北荆大精密钢管实业有限公司 | Roll type forming machine |
| CN103157694A (en) * | 2013-02-21 | 2013-06-19 | 山西太钢不锈钢股份有限公司 | Manufacturing method of steel tube provided with rack-shaped inner wall |
| CN104148906A (en) * | 2014-08-25 | 2014-11-19 | 黄伟津 | Manufacturing method of copper-plated iron pipe for rotary compressor of air conditioner |
| CN105710156A (en) * | 2016-01-25 | 2016-06-29 | 太原科技大学 | Technology for rolling metal composite tube with corrugated combination surface |
-
1996
- 1996-07-17 CN CN 96107088 patent/CN1170642A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100376338C (en) * | 2005-11-23 | 2008-03-26 | 何甜灶 | Method and apparatus for producing heterotype tubing using steel plate |
| CN102151725A (en) * | 2011-01-28 | 2011-08-17 | 湖北荆大精密钢管实业有限公司 | Roll type forming machine |
| CN102151725B (en) * | 2011-01-28 | 2012-10-03 | 湖北荆大精密钢管实业有限公司 | Roll type forming machine |
| CN103157694A (en) * | 2013-02-21 | 2013-06-19 | 山西太钢不锈钢股份有限公司 | Manufacturing method of steel tube provided with rack-shaped inner wall |
| CN104148906A (en) * | 2014-08-25 | 2014-11-19 | 黄伟津 | Manufacturing method of copper-plated iron pipe for rotary compressor of air conditioner |
| CN105710156A (en) * | 2016-01-25 | 2016-06-29 | 太原科技大学 | Technology for rolling metal composite tube with corrugated combination surface |
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