CN100510605C - Automatic cleaning and heat transferring strengthened whirl opening tooth straight strip in heat transferring tube - Google Patents
Automatic cleaning and heat transferring strengthened whirl opening tooth straight strip in heat transferring tube Download PDFInfo
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- CN100510605C CN100510605C CNB2004100466116A CN200410046611A CN100510605C CN 100510605 C CN100510605 C CN 100510605C CN B2004100466116 A CNB2004100466116 A CN B2004100466116A CN 200410046611 A CN200410046611 A CN 200410046611A CN 100510605 C CN100510605 C CN 100510605C
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- eddy flow
- tooth
- heat
- transfer pipe
- power tooth
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Abstract
The spiral-flow mouth tooth straight band mounted in the heat transfer tube is composed of straight band and power tooth of spiral-flow mouth, on the straight band the auxiliary tooth can be set also. Under the retention guide action of power tooth and auxiliary tooth a portion of fluid in the tube can be axially flowed, another portion of fluid can be spirally flowed via spiral-flow mouth. Said invention can be extensively used in the shell-and-tube heat transfer equipment for automatically-cleaning tube scale and implementing heat transfer intensification.
Description
Technical field
Automatic cleaning and heat conduction reinforced eddy flow ability to speak directly are with in a kind of heat-transfer pipe that the present invention relates to, and are primarily aimed at the interior dirt automatic desludging antiscale and heat conduction reinforced of pipe of tubular heat exchanger.It is applicable to moves the various shell and tube heat-transfer equipments that flow velocity is lower, need heat conduction reinforced or automatic scavenge pipe inwall dirt in the heat-transfer pipe, as heat exchanger, condenser, evaporimeter etc.
Background technology
The heat exchanger quantity of heat-transfer equipment mesochite tubular structure is maximum.In the shell and tube exchanger again with velocity in pipes (0.5m/s-0.9m/s) lower account for its overwhelming majority.The common feature of these equipment is foulings easily in the pipe, and convective heat-transfer coefficient is lower, therefore needs automatic cleaning and descaling antiscale and heat conduction reinforced.Some nearest documents, for example: Zhi Jiaoheng etc., the twisted strip with oblique teeth of the low flow velocity heat-transfer equipment of energy resource system cleans new technology automatically. coal mine machinery, 2003, (4): 85-; Liu Guiying, Yu Tianlan, etc., automatic cleaning and heat conduction reinforced technology thereof in the low flow velocity heat-transfer pipe. Chinese well mine salt, 2003, (3): 38-40; YuTianlan, et.al., The Self-cleaning and Heat Transfer Enhancement Technology ofthe Twisted Strip with Oblique Teeth Used in Condensing Tubes of RefrigeratingUnits, ICCR (International Conference on Cryogenics ﹠amp; Refrigeration, April 22-25,2003, Hangzhou, P.R.C, P553-556; Or the like, introduced the new Ying's of a kind of structure spiral helical teeth twisted strip, can increase the spin moment of smooth twisted strip exponentially, can improve heat conduction reinforced amplitude significantly again, can under low flow velocity, be extensive use of.But because structure is too complicated, to smooth twisted strip, then the manufacturing expense costliness loses its construction value to helical teeth wherein as if the process Installation that adopts bonding or welding; The technical barrier of the direct manufacturing spiral shell of high efficiency, cheapness does not crack again as yet, can't apply in industrial production.
Summary of the invention
The present invention is intended to solve the difficulty of spiral helical teeth twisted strip manufacturing technology, proposing interior cleaning automatically of a kind of heat-transfer pipe and heat conduction reinforced eddy flow ability to speak directly is with, the basic advantage that can either keep spiral helical teeth twisted strip, spin moment than smooth twisted strip increases exponentially, convective heat-transfer coefficient in the pipe is increased substantially, be convenient to injection molded again, produce in a large number expeditiously, and manufacturing expense is cheap, so that (widely apply in the shell-tube type heat-transfer equipment of 0.5m/s-0.9m/s) in that velocity in pipes is lower.
Technical scheme of the present invention is: cleaning automatically in a kind of heat-transfer pipe and heat conduction reinforced eddy flow ability to speak directly is with, be made of straight band that the eddy flow mouth is arranged and power tooth, also can be to be made of the straight band that the eddy flow mouth is arranged and power tooth and secondary tooth.There is the width B of the straight band of eddy flow mouth to be slightly less than the inside diameter D of heat-transfer pipe.The uniform vertically two sides that is arranged in the straight band of eddy flow mouth of power tooth and secondary tooth.Power tooth, secondary tooth are α with the angle of straight band center line, also can the former is less.Power tooth and secondary tooth are not to be symmetry with the center line arranging of width, but the power tooth is being partial to a side of updrift side, and secondary tooth is in a side in its downstream, but can not arrange secondary tooth yet.The eddy flow mouth all is the side at the downstream direction of power tooth, and upstream one side near the extended line of power tooth.Eddy flow mouth and power tooth can corresponding one by one settings, also can be provided with at interval, but all be equidistantly to arrange along its length.Straight band positive with the power tooth at the back side, secondary tooth axially can be staggered, can be not staggered yet.The addendum line of power tooth and secondary tooth is a camber line, and it highly all is that nearly centerline is higher, proximal edge is lower.The length that the eddy flow ability to speak directly is with is identical substantially with heat-transfer pipe, can be formed by connecting by plurality of sections, and also can be an overall structure.The head that the eddy flow ability to speak directly is with is connected with rotating shaft, and the other end of rotating shaft is axially fixed on the eddy flow bearing block of the mouth of pipe of heat-transfer pipe fluid intake end.There are the straight band of eddy flow mouth and power tooth and secondary tooth thereof all to adopt the engineering plastics manufacturing, in order to avoid the heat transfer tube wall is worn in the long-time running process.
Automatic cleaning and heat conduction reinforced eddy flow ability to speak directly are with in a kind of heat-transfer pipe of the present invention, owing to there be directly being with of eddy flow mouth to be provided with the power tooth, after the liquid of axial flow velocity u flows into from the arrival end of heat-transfer pipe during operation, be subjected to stopping and leading of power tooth and secondary tooth, a part of fluid is with speed u
1Axial flow, another part fluid then flow to the back side through the eddy flow mouth and form speed u
2Helix flow, the eddy flow open area is bigger, the ratio of the fluid that helix flows is also bigger.The liquid that is blocked water conservancy diversion all is the normal direction of the flank of tooth to the active force of power tooth and secondary tooth, and wherein the component of axis direction just becomes the load of mouth of pipe bearing, and the component F on cross section
1With F
2Then the center line to straight band forms an autorotation moment M, and the autorotation moment M that is produced is more much bigger than smooth twisted strip, and its value can reach more than one times.Since directly with on the eddy flow mouth and the acting in conjunction of eddy flow bearing block, make a part of fluid can helical flow, thereby solved the startup difficult problem of straight band rotation preferably.Because the eddy flow mouth structure, rotational velocity is significantly accelerated, and fluid resistance obviously descends; And the eddy flow open area is bigger, and rotational velocity is faster, and the fluid resistance decline scope is also bigger.Therefore, the straight band of this eddy flow ability to speak can rotation in the heat-transfer pipe of the low flow velocity of 0.50m/s～0.90m/s, and carries out automatically reliably and clean.
Because the fluid in the heat-transfer pipe is subjected to strong stopping and throttling at power tooth and secondary tooth place, produce a large amount of eddy current in its downstream; The continuous mutual agitation of fluid of part because the fluid of axial flow part and helix flow all makes the churning in the heat-transfer pipe increase again, thereby the convection heat transfer' heat-transfer by convection process in the pipe obtains effectively reinforcement, can make the intraductal heat transfer factor alpha
iImproved significantly.
Description of drawings
Fig. 1 is the structure principle chart that interior cleaning automatically of a kind of heat-transfer pipe of the present invention and heat conduction reinforced eddy flow ability to speak directly are with.
Fig. 2 is that eddy flow ability to speak of the present invention directly is with autorotation moment to form principle schematic.
Fig. 3 is the straight band structure schematic diagram of eddy flow ability to speak that secondary tooth is arranged
Fig. 4 is the straight band structure schematic diagram of the eddy flow ability to speak of no secondary tooth
The specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing 1, Fig. 2, Fig. 3 and Fig. 4.
1. heat-transfer pipes, 2. eddy flow abilities to speak among the figure directly are with 3. rotating shafts, 4. eddy flow bearing blocks, 5. sliding bearings 6. directly to be with 7. eddy flow mouths, 8 power teeth, 9 secondary teeth
Automatically clean in a kind of heat-transfer pipe and heat conduction reinforced eddy flow ability to speak directly is with, by have eddy flow mouth 7 directly be with 6 and power tooth 8 constitute, also can be by have eddy flow mouth 7 directly be with 6 and power tooth 8 and secondary tooth 9 constitute.Directly be slightly less than the inside diameter D of heat-transfer pipe 1 with 6 width B, width ratio B/D is in 0.70～0.95 scope.Power tooth 8 and secondary tooth 9 be all uniform vertically to be arranged in directly the positive back side with 6, tooth pitch T is in the scope of (1.50～5.00) D, the size of the ratio (T/D) of tooth pitch is by the decision of the flow velocity in the heat-transfer pipe 1 relatively, and flow velocity is higher, and the ratio of the ratio t/D of tooth pitch is also bigger relatively.Power tooth 8 is angle α with the center line with 6 directly, and angle α is 25
0To 45
0Scope.Secondary tooth 9 is parallel to each other with power tooth 8, and angle α that also can secondary tooth 9 is bigger than the angle α of power tooth 8.Power tooth 8 and secondary tooth 9 are not with the center line to be symmetry the arranging of width with 6 directly, but power tooth 8 is arranged in a side of being partial to updrift side, and secondary tooth 9 is arranged in a side of being partial to downstream direction.Power tooth 8 and the projection width of secondary tooth 9 on the cross section of straight band are all in the scope of (0.45～0.60) B.Eddy flow mouth 7 all is the side at the downstream direction of power tooth, and upstream one side near the extended line of power tooth 8.Eddy flow mouth 7 and power tooth 8 can corresponding one by one settings, also can be provided with at interval, and all be equidistantly to arrange along its length directly being with on 6.Power tooth 8 and secondary tooth 9 thereof can be not staggered in that directly the positive back side with 6 can be staggered yet.The addendum line of power tooth 8 and secondary tooth 9 is a camber line, highly all is near directly higher with 6 centerline, near directly lower with 6 lateral edges place.The eddy flow ability to speak is directly identical substantially with heat-transfer pipe 1 with 2 length.Heat-transfer pipe 1 an interior eddy flow ability to speak of installing directly can be formed by connecting by plurality of sections with 2, also can be an overall structure.The eddy flow ability to speak directly is connected with rotating shaft 3 with 2 head, and the other end of rotating shaft 3 is axially fixed on the eddy flow bearing block 4 of the mouth of pipe of heat-transfer pipe 1 fluid intake end.Have eddy flow mouth 7 directly be with 6 and power tooth 8 and secondary tooth 9 thereof all adopt the engineering plastics manufacturing, in order to avoid the heat transfer tube wall is worn in the long-time running process.
During operation, the liquid of axial flow velocity u is subjected to stopping of power tooth 8, secondary tooth 9 and leads, and wherein a part of liquid is with flow velocity u
1Make axial flow, another part fluid flows to the back side through spiral flow breach 7, forms flow velocity u
2Helix flow.Being blocked the liquid of guiding all is the normal direction of the flank of tooth to the power tooth 8 of front and back, the force direction of secondary tooth 9, and the component of its axis direction becomes the axial load of eddy flow bearing block 4, and the component F on cross section
1With F
2Then to directly forming an autorotation moment M (referring to accompanying drawing 2) with 6 center line, the spin moment M that is produced is more much bigger than the spin moment of the smooth twisted strip of equal length, can reach one times even more.The area of eddy flow mouth 7 is bigger, and directly with 2 rotation startability better, rotational velocity is bigger for the eddy flow ability to speak, and the fluid resistance decline scope is also bigger.Therefore, this eddy flow ability to speak directly can rotation reliably in the heat-transfer pipe 1 of the low flow velocity of 0.50m/s～0.90m/s with 2, carries out the automatic cleaning of tube wall dirt.
Because the fluid in the heat-transfer pipe 1 is subjected to strong stopping and throttling at power tooth 8 and secondary tooth 9 places, produce a large amount of eddy current in its downstream; The continuous mutual agitation of fluid of part because the fluid of axial flow part and helix flow makes to be full of eddy current in the heat-transfer pipe everywhere again.So the eddy flow ability to speak directly can make the convection heat transfer' heat-transfer by convection process in the heat-transfer pipe 1 obtain effectively reinforcement with 2, can make the intraductal heat transfer factor alpha
iImproved significantly, its value can reach one times, so that bigger.
Therefore, the eddy flow ability to speak directly can realize online, automatic, the continuous wash of low flow velocity heat-transfer pipes 6 interior dirts down and the efficient reinforcement of convection heat transfer' heat-transfer by convection simultaneously with 2.For example, when the eddy flow ability to speak is directly tested in the stainless-steel pipe of Φ 38 * 3 * 1500 with 2, when the cooling water flow velocity also has only 0.30m/s, just begin rotation and clean, and make the heat transfer coefficient α of heat-transfer pipe 6
iImprove about 150%.
Claims (5)
1. interior cleaning automatically of heat-transfer pipe and heat conduction reinforced eddy flow ability to speak directly are with, and it is characterized in that: this eddy flow ability to speak directly is made of straight band (6) that eddy flow mouth (7) is arranged and power tooth (8) with (2); The uniform vertically positive back side that is arranged in straight band (6) of power tooth (8), with the angle of straight band (6) center line be that α is 20 °～45 ° scopes; Power tooth (8) is not with the center line to be symmetry the arranging of width of straight band (6), but is being partial to a side of updrift side; The front of straight band (6) and the power tooth (8) at the back side axially are being staggered, or not staggered; Eddy flow mouth (7) is arranged in a side of the downstream direction of power tooth (8), and upstream one side of the extended line of power tooth (8); Eddy flow mouth (7) is corresponding one by one setting with power tooth (8), or is provided with at interval.
2. automatic cleaning and heat conduction reinforced eddy flow ability to speak directly are with in a kind of heat-transfer pipe according to claim 1, it is characterized in that: described eddy flow ability to speak directly is made of the straight band (6) that eddy flow mouth (7) is arranged and power tooth (8) and secondary tooth (9) with (2), its secondary tooth (9) is arranged in the downstream of power tooth (8) directly with the opposite side of (6) center line, and the distance L between secondary tooth (9) and the power tooth (8) is tooth pitch T (0.35～0.70) times.
3. automatic cleaning and heat conduction reinforced eddy flow ability to speak directly are with in a kind of heat-transfer pipe according to claim 1, it is characterized in that: described eddy flow ability to speak directly is connected with rotating shaft (3) with the head of (2), and the other end of rotating shaft (3) is axially fixed on the eddy flow bearing block (4) of heat-transfer pipe (1) fluid intake end.
4. automatic cleaning and heat conduction reinforced eddy flow ability to speak directly are with in a kind of heat-transfer pipe according to claim 1, it is characterized in that: the described eddy flow ability to speak directly length with (2) is identical substantially with heat-transfer pipe (1), be formed by connecting by plurality of sections, or an overall structure.
5. automatic cleaning and heat conduction reinforced eddy flow ability to speak directly are with in a kind of heat-transfer pipe according to claim 2, it is characterized in that: described power tooth (8) is a camber line with the addendum line of secondary tooth (9), highly all is that nearly centerline is higher, proximal edge is lower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100466116A CN100510605C (en) | 2004-07-30 | 2004-07-30 | Automatic cleaning and heat transferring strengthened whirl opening tooth straight strip in heat transferring tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100466116A CN100510605C (en) | 2004-07-30 | 2004-07-30 | Automatic cleaning and heat transferring strengthened whirl opening tooth straight strip in heat transferring tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1727833A CN1727833A (en) | 2006-02-01 |
| CN100510605C true CN100510605C (en) | 2009-07-08 |
Family
ID=35927235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100466116A Expired - Fee Related CN100510605C (en) | 2004-07-30 | 2004-07-30 | Automatic cleaning and heat transferring strengthened whirl opening tooth straight strip in heat transferring tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100510605C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813437B (en) * | 2009-02-20 | 2012-07-25 | 北京华夏英蓝科技发展有限公司 | Unit-combination type heat transfer enhancement device |
| CN101968330A (en) * | 2010-10-28 | 2011-02-09 | 湖北登峰换热器有限公司 | Built-in strengthening flap type heat exchange tube |
| CN102787823B (en) * | 2011-05-16 | 2015-01-28 | 王震 | Downhole rotational flow shearing generator |
| CN102913157B (en) * | 2012-11-08 | 2015-04-22 | 中国石油天然气集团公司 | Underground sleeve rotational flow guider |
| CN108444330A (en) * | 2015-10-13 | 2018-08-24 | 丽水学院 | A kind of compound intensified heat-transfer pipe |
-
2004
- 2004-07-30 CN CNB2004100466116A patent/CN100510605C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1727833A (en) | 2006-02-01 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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Granted publication date: 20090708 Termination date: 20090730 |