CN2660467Y - Internally rotary cleaning for tube, and heat transfer reinforced dual-side tooth flat belt - Google Patents
Internally rotary cleaning for tube, and heat transfer reinforced dual-side tooth flat belt Download PDFInfo
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- CN2660467Y CN2660467Y CN 200320114210 CN200320114210U CN2660467Y CN 2660467 Y CN2660467 Y CN 2660467Y CN 200320114210 CN200320114210 CN 200320114210 CN 200320114210 U CN200320114210 U CN 200320114210U CN 2660467 Y CN2660467 Y CN 2660467Y
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- flat rubber
- rubber belting
- helical teeth
- pipe
- heat
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Abstract
A double-side toothed flat belt has double functions including automatic cleaning function inside heat transfer tube and heat transfer enhancement function. Plastic oblique teeth with separation are arranged on both sides of a plastic flat belt. The angle alpha between the plastic oblique teeth and the central line of the plastic flat belt is more than 16 degrees and less than 68 degrees. The oblique teeth are not symmetry relative to the central line of the plastic flat belt but all deviate to the upstream of the belt. The reaction force component acting on the oblique teeth from the liquid guided by the oblique teeth forms a strong rotary kinetic moment which is more than two times of automatic cleaning moment of smooth torsion belt with the same length. The rotary liquid can be used to clean dirt inside the heat exchange tube with low flow velocity more than 0.50 millimeter per second. The strong eddy flows at the downstream of the oblique teeth make the whole heat exchange tube be filled with eddy flows and strengthen convective heat transfer inside the tube effectively. The heat transfer coefficient alpha i in the heat exchange tube is enhanced by about 150 percent. Therefore, the toothed flat belt can be popularized on various shell-tube heat exchangers with middle and low flow velocity and gain more benefits.
Description
The utility model relates to rotation type cleaning and heat conduction reinforced double-faced toothed flat rubber belting in a kind of pipe.Be particularly related to the automatic desludging scale prevention device of tubular heat exchanger.It is applicable to the various heat-transfer equipments of tubular structure, as heat exchanger, condenser, evaporimeter etc.
Rotary automatic flushing device in U.S. Pat 4174750 and the disclosed heat-transfer pipe of Chinese patent literature CN2214239Y, it is mainly become by axial restraint device two parts that twisted strip that can rotate in heat-transfer pipe and a end with twisted strip are fixed on the heat-transfer pipe liquid feeding end.The dirt of sweeping inside pipe wall is scraped in twisted strip rotation under the drive of intraductal heat transfer fluid, has function online, automatic, the continuous wash antiscale; Flow in the shape of a spiral owing to the guide functions of twisted strip makes liquid, the convection heat transfer' heat-transfer by convection function in the pipe is strengthened.High flow velocities more than 1m/s drives rotation but this class twisted strip device generally needs liquid in pipe, and the low flow rates operation in 0.5m/s-0.9m/s of the liquid in pipe flow velocity of present most of shell and tube heat-transfer equipments, low flow velocity Plastic Flat down drives that moment is too small and weak can not be certainly then can't use; And the heat conduction reinforced amplitude of this class two-phase twisted strip is not high, on average has only 13.1% (paper-condenser adopts rotation twisted strip cleaning technique to analyze, North China power technology, the 35th page of 2002 the 6th phase).Reach heat transfer helical teeth shape twisted strip in the disclosed low flow velocity heat-transfer pipe of China's utility model patent (patent No. 02139658.2), this twisted strip with oblique teeth has solved the reinforcement problem of moment, can in use under the low flow velocity, make unusual difficulty, new problem that cost is too high but exist again.
Technical problem to be solved in the utility model be the too high problem of tooth twisted strip manufacturing difficulty cost and existing twisted strip be difficult to a little less than the kinetic moment under the low flow velocity in rotation is used, heat conduction reinforced amplitude is not high under the low flow velocity problem, proposition is convenient to make, the interior rotation type of a kind of pipe with low cost cleans and heat conduction reinforced double-faced toothed flat rubber belting, the spin moment of existing reinforcement, can in low flow velocity (in the 0.5m/s-0.9m/s scope) use down, efficient augmentation of heat transfer again, be the convective heat-transfer coefficient raising about 150% in the pipe.
The technical solution of the utility model is: rotation type cleans and heat conduction reinforced double-faced toothed flat rubber belting in a kind of pipe, and it is made up of plastics flat rubber belting, helical teeth, mouth of pipe fixture, heat-transfer pipe.Be arranged on plastics flat rubber belting and heat-transfer pipe same length in the heat-transfer pipe.Helical teeth has all been designed on the two sides of plastics flat rubber belting, and the center line of helical teeth and plastics flat rubber belting is angle α, equidistantly arranges along its length, and double-edged helical teeth can be staggered, also can be not staggered.The ratio of the length L of helical teeth and the oblique wide B of flat rubber belting is in 0.4～0.8 scope.Helical teeth is not with the center line to be symmetry arranging of width, and all is to be partial to updrift side one side.The height of helical teeth all is that nearly centerline is higher, proximal edge is lower, and addendum line is made of some straight lines, camber line.Helical teeth and plastics flat rubber belting are all with the engineering plastics manufacturing of the tube wall that can not wear and tear.The connecting hole of the center of plastics flat rubber belting one end is connected with rotating shaft, and the other end of rotating shaft is put on the mouth of pipe fixture that is axially fixed in heat-transfer pipe fluid inlet end.The interior plastics flat rubber belting of installing of heat-transfer pipe can be an overall structure, also can be formed by connecting by plurality of sections.
Rotation type cleans and heat conduction reinforced double-faced toothed flat rubber belting in the pipe of the present utility model, owing on flat rubber belting, be provided with helical teeth, liquid is after the entrance point inflow of heat-transfer pipe when operation, being subjected to stopping with guiding of helical teeth produces a normal direction component velocity vertical with pitch face, and the liquid that is changed direction is simultaneously to the normal reaction of an equivalence of pitch face effect.The reaction force N that double-edged pitch face is subjected to the component T of flat rubber belting center line vertical direction, center line to the plastics flat rubber belting forms the rotary power square, the resultant moment M that is produced is bigger, can reach more than a times of the smooth twisted strip spin moment of equal length, therefore, cleaning is automatically carried out in rotation in the lower flow velocity heat-transfer pipe of the double-faced toothed flat rubber belting of this plastics more than 0.50m/s.
Because the helical teeth on the plastics flat rubber belting makes fluid produce strong eddy current behind tooth, therefore make in the heat-transfer pipe that hangs down flow velocity to be full of eddy current everywhere, make the convection heat transfer' heat-transfer by convection effect obtain effectively reinforcement, can be so that the intraductal heat transfer factor alpha
iImprove about 150%.
Description of drawings
Fig. 1 is that rotation type cleans and the structure principle chart of heat conduction reinforced double-faced toothed flat rubber belting in a kind of pipe of the present utility model.
Fig. 2 is that the turning moment of double-faced toothed flat rubber belting of the present utility model forms principle schematic.
The specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing 1 and Fig. 2.
1. mouth of pipe fixtures, 2. rotating shafts, 3. flat rubber belting heads, 4. connecting holes, 5. tube sheets, 6. heat-transfer pipes, 7. plastics flat rubber beltings, 8. helical teeth, 9. eddy current, 10. liquid in pipe, 11 profile of tooth flat rubber beltings among the figure
Rotation type cleans and heat conduction reinforced double-faced toothed flat rubber belting 11 in the pipe of the present utility model, be arranged in the heat-transfer pipe 6, makes with engineering plastics, and width is slightly less than the internal diameter of heat-transfer pipe 6, and length and heat-transfer pipe 6 are basic identical, and flat rubber belting head 3 has connecting hole 4.The connecting hole 4 of rotating shaft 2 and Plastic Flat band head 3 joins, and the other end of rotating shaft 2 is axially fixed on the mouth of pipe fixture 1, and rotating shaft 2 circumferentially can rotate freely.
The helical teeth 8 that useful engineering plastics are made is all designed on the two sides of plastics flat rubber belting 7, and angle α is 16 ° to 68 ° scopes.The ratio of the length L of helical teeth 8 and the oblique wide B of flat rubber belting is in 0.4～0.8 scope.Helical teeth 8 is not with the center line to be symmetry arranging of width, and all is to be partial to updrift side one side.Double-edged helical teeth 8 is equidistantly arranged along the length direction of plastics flat rubber belting 7, and double-edged helical teeth 8 can be staggered, also can be not staggered.The spacing t of helical teeth 8 is 1.5-6.5 a times of heat-transfer pipe 6 diameters, and flow velocity is lower, and preferred distance t is littler.
The shape of helical teeth 8, it highly all is that nearly centerline is higher, proximal edge is lower, addendum line is constituted by some straight lines, arc curve or its.
The plastics profile of tooth flat rubber belting of installing in the heat-transfer pipe 6 11 can be an overall structure, also can be to be formed by connecting by plurality of sections.
Referring to accompanying drawing 2.During operation, liquid in pipe 10 changes direction under the guiding of helical teeth 8, and the 10 pairs of helical teeth 8 of liquid that change direction are with reaction force N, and its component T constitutes autorotation moment M to the center line of plastics profile of tooth flat rubber belting 11.The value of the autorotation moment M that is formed by the component T of all helical teeth 8 is bigger, and therefore double-faced toothed flat rubber belting 11 can rotation under low flow velocity, realizes online, automatic, the continuous wash of dirts in the heat-transfer pipe 6.For example, when testing in the stainless-steel pipe of Φ 38 * 3 * 1500, the cooling water flow velocity has only 0.28m/s just to begin rotation.
Referring to accompanying drawing 1.Because the downstream of helical teeth 8 forms strong throttle type eddy current 9, make in the whole heat-transfer pipe 6 all to be full of eddy current, so the convection heat transfer' heat-transfer by convection in the heat-transfer pipe 6 obtain very effective reinforcement, can manage interior α
iHeat transfer coefficient improves about 150%.
Claims (4)
1. the interior rotation type of pipe cleans and heat conduction reinforced double-faced toothed flat rubber belting, by mouth of pipe fixture (1), helical teeth (8) and plastics flat rubber belting (7) are formed, it is characterized in that: the tow sides of the plastics flat rubber belting (7) of described double-faced toothed flat rubber belting (11) have all designed helical teeth (8), the angle α of helical teeth and center line is 16 ° to 68 ° scopes, helical teeth (8) is not to be symmetry arrangement with the center line, but all be to be partial to updrift side one side, the ratio of the length L of helical teeth 8 and the oblique wide B of flat rubber belting is in 0.4～0.8 scope, helical teeth (8) is equidistantly arranged along its length at the tow sides of plastics flat rubber belting (7), the spacing t of helical teeth (8) be heat-transfer pipe (6) internal diameter 1.5-6.5 doubly, double-edged helical teeth can be staggered, also can be not staggered.
2. clean and heat conduction reinforced double-faced toothed flat rubber belting according to rotation type in the described a kind of pipe of claim 1, it is characterized in that: the shape of described helical teeth (8), it highly all is that nearly centerline is higher, proximal edge is lower, and addendum line is constituted by some straight lines, arc curve or its.
3. clean and heat conduction reinforced double-faced toothed flat rubber belting according to rotation type in the described a kind of pipe of claim 1, it is characterized in that: the material of described helical teeth (8) and plastics flat rubber belting (7) is engineering plastics.
4. rotation type cleans and heat conduction reinforced double-faced toothed flat rubber belting in a kind of pipe according to claim 6, it is characterized in that: the length of plastics flat rubber belting (7) and heat-transfer pipe (6) are basic identical, can also can be formed by connecting for an overall structure by plurality of sections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320114210 CN2660467Y (en) | 2003-11-26 | 2003-11-26 | Internally rotary cleaning for tube, and heat transfer reinforced dual-side tooth flat belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320114210 CN2660467Y (en) | 2003-11-26 | 2003-11-26 | Internally rotary cleaning for tube, and heat transfer reinforced dual-side tooth flat belt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2660467Y true CN2660467Y (en) | 2004-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320114210 Expired - Fee Related CN2660467Y (en) | 2003-11-26 | 2003-11-26 | Internally rotary cleaning for tube, and heat transfer reinforced dual-side tooth flat belt |
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| CN (1) | CN2660467Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100450649C (en) * | 2003-11-26 | 2009-01-14 | 湖南工业大学 | Auto rotating type cleaning and heat transferring intensify technology for double face serrated form flat belt inside pipe |
| CN102121807A (en) * | 2011-02-16 | 2011-07-13 | 江村 | Double-diameter spring type heat transfer pipe insert orifice fixing device |
| CN107076263A (en) * | 2014-10-31 | 2017-08-18 | 三之星机带株式会社 | Flat rubber belting, the manufacture method with mechanism, belt lifting mechanism, installation method and flat rubber belting |
| CN107702587A (en) * | 2017-10-30 | 2018-02-16 | 俞天翔 | Couple spiral cleaning formula natural-circulation evaporator |
| CN112923782A (en) * | 2021-04-16 | 2021-06-08 | 安徽省正大电力建设有限公司 | Scale cleaning device for hot water pipeline |
-
2003
- 2003-11-26 CN CN 200320114210 patent/CN2660467Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100450649C (en) * | 2003-11-26 | 2009-01-14 | 湖南工业大学 | Auto rotating type cleaning and heat transferring intensify technology for double face serrated form flat belt inside pipe |
| CN102121807A (en) * | 2011-02-16 | 2011-07-13 | 江村 | Double-diameter spring type heat transfer pipe insert orifice fixing device |
| CN107076263A (en) * | 2014-10-31 | 2017-08-18 | 三之星机带株式会社 | Flat rubber belting, the manufacture method with mechanism, belt lifting mechanism, installation method and flat rubber belting |
| US10088023B2 (en) | 2014-10-31 | 2018-10-02 | Mitsuboshi Belting Ltd. | Flat belt, belt mechanism, belt lifting mechanism, attachment method, and method for manufacturing flat belt |
| CN107702587A (en) * | 2017-10-30 | 2018-02-16 | 俞天翔 | Couple spiral cleaning formula natural-circulation evaporator |
| CN107702587B (en) * | 2017-10-30 | 2019-05-24 | 俞天翔 | Couple spiral cleaning formula natural-circulation evaporator |
| CN112923782A (en) * | 2021-04-16 | 2021-06-08 | 安徽省正大电力建设有限公司 | Scale cleaning device for hot water pipeline |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |