CN113310330B - Double-layer spiral band and double-layer turbulence device - Google Patents
Double-layer spiral band and double-layer turbulence device Download PDFInfo
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- CN113310330B CN113310330B CN202110626250.6A CN202110626250A CN113310330B CN 113310330 B CN113310330 B CN 113310330B CN 202110626250 A CN202110626250 A CN 202110626250A CN 113310330 B CN113310330 B CN 113310330B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
- F28D7/022—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of two or more media in heat-exchange relationship being helically coiled, the coils having a cylindrical configuration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/24—Arrangements for promoting turbulent flow of heat-exchange media, e.g. by plates
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to the technical field of spiral ties, in particular to a double-layer spiral tie and a double-layer turbulence device. The tie body comprises a framework layer and a soft coating layer, wherein the framework layer is positioned in the soft coating layer, and the soft coating layer completely coats the framework layer; the ligament body is formed by rotating, twisting and forming around the length axis of the ligament body, and a medium drives the ligament body to rotate when flowing along the ligament body; the hardness of the framework layer is greater than that of the soft coating layer, the density of the framework layer is different from that of the soft coating layer, and the framework layer is attached to the soft coating layer; the surface of the soft coating layer is smooth, and when the soft coating layer is used, the distance between the ligament body and the inner wall of the pipe is 0.1-5 mm; the double-layer turbulence device comprises a connector and a double-layer spiral band, wherein the connector comprises a clamping support and a rotating shaft. The technical scheme is used for solving the problems that a spiral band in the existing turbulent flow device is easy to scale, is not corrosion-resistant and is easy to scratch the pipe wall.
Description
Technical Field
The invention relates to the technical field of spiral ties, in particular to a double-layer spiral tie and a double-layer turbulence device.
Background
In order to break laminar flow of water in the heat exchange tube and change the water into turbulent flow so as to accelerate heat exchange in the heat exchange tube, a turbulent flow device is usually installed in the heat exchange tube. The existing turbulence device comprises a connector and a spiral band, the existing spiral band is usually made of single-layer high polymer materials or metal, the spiral band sold in the market is also of a single-layer material structure, the relation between the material of the spiral band and the heat exchange effect is not researched in the industry, and the applicant discovers the existing spiral band through research and solves the problems that:
(1) The existing spiral link has higher material hardness, and the inner wall of the heat exchange tube is easily damaged when being scratched or scratched with the inner wall of the heat exchange tube, so that the service life of the heat exchange tube is shortened; (2) The friction coefficient of the material of the spiral link is high, the hydrophobicity is weak, scale is easy to deposit on the surface of the link, on one hand, the self weight of the spiral link is increased, so that the rotating speed is reduced, on the other hand, the self weight is increased, so that the torque loss and the rotating speed of the spiral link are reduced, and further the heat exchange efficiency is reduced; (3) The existing high polymer material has poor corrosion resistance and short service life in acid-base environment.
Disclosure of Invention
Aiming at the defects of the technology, the invention aims to provide a double-layer spiral band and a double-layer turbulence device, which are used for solving the problems that the spiral band in the existing turbulence device is easy to scale, is not corrosion-resistant and is easy to scratch the pipe wall.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the double-layer spiral band comprises a band body, wherein the band body comprises a framework layer and a soft coating layer, the framework layer is positioned in the soft coating layer, and the framework layer is completely coated by the soft coating layer; the ligament body is formed by rotating, twisting and forming around the length axis of the ligament body, and a medium drives the ligament body to rotate when flowing along the ligament body; the hardness of the framework layer is greater than that of the soft coating layer, the density of the framework layer is different from that of the soft coating layer, and the framework layer is attached to the soft coating layer; the surface of the soft coating layer is smooth, and when the soft coating layer is used, the distance between the ligament body and the inner wall of the pipe is 0.1mm-5mm.
The invention has the following technical effects:
(1) On the basis of common macromolecule single-layer spiral ties in the market, an inner framework layer and an outer soft coating layer are arranged to form a double-layer spiral tie. Because the middle framework layer has higher hardness, the double-layer spiral band has smaller deflection value compared with a single-layer spiral band, and the heat exchange tube has the advantages that when the double-layer spiral band is used in a horizontal or vertical longer heat exchange tube, the deflection displacement of the double-layer spiral band generated in the heat exchange tube due to the dead weight of the double-layer spiral band is small, namely, the probability of contact with the inner wall of the heat exchange tube is reduced, and further the probability of damage of the heat exchange tube or the double-layer spiral band due to contact is reduced. (2) Under the condition that the optimal torsion-diameter ratio of the outer soft coating layer is not changed, because the framework layer and the soft coating layer have density difference due to different materials, the size proportion of the framework layer and the soft coating layer can be adjusted according to the density of a medium in the heat exchange tube, so that the overall density of the double-layer spiral band is close to the density of the medium all the time, namely, under the action of multi-directional fluid force, the suspension effect of the double-layer spiral band in the medium can be ensured, the double-layer spiral band can be better suspended in the middle of the heat exchange tube, and the probability of contact with the inner wall of the heat exchange tube when the double-layer spiral band rotates is further avoided. (3) The framework layer can support the soft coating layer, so that the forming and shaping of the double-layer spiral band are facilitated, meanwhile, the soft coating layer coated on the outer side of the framework layer can be made of corrosion-resistant materials such as fluoroplastic, the fluoroplastic layer has the characteristic of low hardness, and the probability of scraping the inner side wall of the heat exchange tube by the spiral band can be effectively reduced by coating the outer side of the framework layer; the fluoroplastic layer has the characteristics of extremely low friction coefficient and hydrophobicity, and the surface of the fluoroplastic layer is smooth and is not easy to adhere impurities, so that the probability of spiral link scale can be effectively reduced, and the problem of reduced heat exchange efficiency caused by reduced torque and reduced rotating speed due to link scale formation and loss is solved; the fluoroplastic has high-temperature resistance and corrosion resistance, the application range is wider, and the fluoroplastic can be applied to various severe working conditions, so that the application field of the spiral link is widened, the service life of the spiral link is prolonged, and the heat exchange efficiency is improved
Further limited, the soft coating layer is fluoroplastic; the framework layer is made of high polymer materials or metal strips. The high polymer material can be PPSU or PES, and its beneficial effects lie in, the casing ply can play the effect that supports to soft coating, is favorable to the shaping and the design of double-deck spiral link, and the soft coating of cladding in the casing ply outside is fluoroplastics, because fluoroplastics have acid and alkali-resistance, wear-resisting and characteristics such as hydrophobicity are strong, can be applicable to various abominable operating modes, and then widen spiral link application, increase spiral link life, improve heat exchange efficiency.
Further, the soft coating layer and the framework layer are formed by co-extrusion, or the soft coating layer is sprayed on the framework layer.
Further limiting, the end parts at two ends of the tie body are subjected to sealing treatment, and the tie body has the beneficial effects that the end parts of the double-layer spiral tie are sealed, so that the problem that the medium in the heat exchange tube enters the inner part of the double-layer bolt tie to corrode the framework layer can be avoided.
Further limiting, the width of the soft coating layer of the ligament body is 14-60 mm, the thickness of the framework layer is 0.5-2 mm, and the thickness of the coating material of the soft coating layer in the thickness direction of the framework layer is 0.25-0.8 mm; the soft coating layer is located the both sides of casing ply and is equipped with solid bordure, the width of borduring is 0.1~5mm, and its beneficial part lies in, selects to make according to condenser pipe diameter size, can be applicable to the condenser of the overwhelming majority on the market, and the solid bordure of both sides can strengthen the wear resistance at double-deck spiral tie edge, and under special circumstances, double-deck spiral tie and heat exchange tube inner wall contact can not easily wear and tear soft coating layer yet, cause the problem of double-deck spiral tie damage.
Further limit, the ratio of the pitch to the width of the ligament body is greater than or equal to 1.5, which is beneficial in that when the ratio of the pitch to the width is greater than 1.5.
Further, at least one framework layer is arranged inside the soft coating layer; the framework layer is dark, and the soft coating layer is transparent or light. The double-layer spiral band suspension device has the advantages that under the condition that the optimal torsion ratio of the outer soft coating layer is not changed, the number of the framework layers can be adjusted according to the density of a medium in the condenser, the overall density of the double-layer spiral band is always critical to the density of the medium, namely, the suspension effect of the double-layer spiral band in the medium can be guaranteed under the action of multi-directional fluid force, the double-layer spiral band can be suspended in the middle of the heat exchange tube well, the probability that the double-layer spiral band is in contact with the inner wall of the heat exchange tube when rotating is avoided, meanwhile, chromatic aberration is arranged between the framework layers and the soft coating layer, the color of the formed framework layers is deeper than that of the coating layers, the single-layer spiral band and the double-layer spiral band can be distinguished visually, and meanwhile, exposure and damage of the inner framework layer can be detected conveniently.
Further defined, the service life is at least 1 year in an extreme environment with pH less than 1 or pH greater than 13, T less than 200 ℃, P less than 10MPa and medium flow rate V less than 3 m/s.
Double-deck vortex device, including connector and double-deck spiral tie, the connector includes chucking support and pivot, the tip of chucking support chucking at the traded people pipe, the pivot sets up the inside at the chucking stabilizer blade, the tip of double-deck spiral tie and the one end fixed connection of pivot.
Further inject, the tie body is equipped with the seal cover of its complete cladding with the connecting portion outside of pivot, and its beneficial part lies in, the seal cover can avoid the medium to get into the connecting portion of double-deck spiral tie and pivot, has guaranteed promptly that the medium can not permeate into the inside of double-deck spiral tie through connecting portion to the effectual double-deck spiral tie of having protected does not receive the erosion of medium.
Drawings
FIG. 1 is a schematic view of the connection between the connector and the double-layer spiral tie in embodiment 1;
FIG. 2 is a schematic perspective view of a double-layer ligament in embodiment 1.
Fig. 3 is a partially enlarged schematic view of a portion a in fig. 2.
FIG. 4 is a schematic view showing a plurality of skeleton layers distributed in a soft coating layer in example 2.
Reference numerals
The connector 1, the double-layer spiral tie 2, the soft coating layer 3 and the framework layer 4.
Detailed Description
The following is further detailed by way of specific embodiments:
example 1
As shown in fig. 1, fig. 2 and fig. 3, double-deck spiral tie and double-deck vortex device, double-deck vortex device specifically does in this embodiment, including connector 1 and double-deck spiral tie 2, connector 1 mainly includes the chucking support with connector 1 chucking at heat exchange tube one end, be equipped with the pivot in the chucking support, the one end of double-deck spiral tie 2 and the one end fixed connection of pivot, the rivet connection that fixed connection's mode adopted in this implementation, preferably, the double-deck spiral tie 2 is equipped with the seal cover with its complete cladding with the connecting portion outside of pivot, its beneficial effects lie in, the seal cover can avoid the medium to get into the connecting portion of double-deck spiral tie 2 and pivot, guaranteed promptly that the medium can not permeate into the inside of double-deck spiral tie 2 through connecting portion, thereby the effectual double-deck spiral tie 2 of having protected does not receive the erosion of medium. Meanwhile, the end parts of the double-layer spiral bands 2 are subjected to sealing treatment, and the sealing treatment can be hot melting treatment similar to welding.
The double-layer spiral band 2 is formed by rotating and twisting the band body around the length axis of the band body, a medium inside the heat exchange tube drives the band body to rotate when flowing along the band body, the hardness of the framework layer 4 is greater than that of the soft coating layer 3, the framework layer 4 inside the heat exchange tube is harder and can support the soft coating layer 3, the soft coating layer 3 outside the heat exchange tube is softer and can reduce the probability of scratching the inner wall of the heat exchange tube when contacting the inner wall of the heat exchange tube, the density of the framework layer 4 is different from that of the soft coating layer 3, the framework layer 4 is attached to the soft coating layer 3, the surface of the soft coating layer 3 is smooth, and when the double-layer spiral band is used, the distance between the band body and the inner wall of the tube is 0.1mm-5mm, and the double-layer spiral band is preferably 1mm in the embodiment. The double-layer spiral band 2 mainly comprises a framework layer 4 and a soft coating layer 3 in the embodiment, the framework layer 4 is completely coated in the soft coating layer 3, in the embodiment, the soft coating layer 3 and the framework layer 4 are formed by co-extrusion, the process production flow can be effectively simplified by the co-extrusion, and the double-layer spiral band has the advantages of short forming time, low energy consumption and high integrity degree of a formed composite product. And the edges of two sides of the soft coating layer 3 are provided with solid edges, the solid edges on the two sides can enhance the wear resistance of the edge of the double-layer spiral band 2, and under special conditions, the double-layer spiral band 2 is in contact with the inner wall of the heat exchange tube, so that the soft coating layer 3 cannot be easily abraded, and the problem that the double-layer spiral band 2 is damaged is solved. The width of the soft coating layer 3 of the double-layer spiral band 2 is 14-60 mm, the thickness of the framework layer 4 is 0.5-2 mm, the thickness of the coating material of the soft coating layer 3 positioned in the thickness direction of the framework layer 4 is 0.25-0.8 mm, and the width of the covered edge is 0.1-5 mm. Preferably, the ratio of the pitch to the width of the double-layer spiral ligament 2 is greater than 1.5, which is beneficial in that when the ratio of the pitch to the width is greater than 1.5.
In this embodiment, the soft coating layer 3 and the skeleton layer 4 are both made of a polymer material. Specifically be soft coating 3 material for fluoroplastics, the material of casing ply 4 is PPSU or PES, its beneficial part lies in, casing ply 4 is the macromolecular material that hardness is high, can play the effect of support to soft coating 3, be favorable to the shaping and the design of double-deck spiral link 2, the cladding is at soft coating 3 in the casing ply 4 outside for fluoroplastics, because fluoroplastics has acid and alkali-resistance, characteristics such as wear-resisting and hydrophobicity are strong, can be applicable to various abominable operating modes, and then widen spiral link application, increase spiral link life, heat exchange efficiency is improved.
Preferably, the skeleton layer 4 and the soft coating layer 3 have color difference, the skeleton layer has dark color, and the soft coating layer has transparent color, so that the single-layer spiral tie and the double-layer spiral tie 2 can be distinguished visually, and the exposure damage of the inner skeleton layer 4 can be detected conveniently. Preferably, the carcass layer 4 and the soft cover layer 3 have a color difference, which is advantageous in that it facilitates visual distinction between the single-layer helical ligament and the double-layer helical ligament 2, and also facilitates detection of exposure damage to the inner carcass layer 4.
The service life of the double-layer spiral band is at least 1 year in an extreme environment with the PH less than 1 or the PH more than 13, the T less than 200 ℃, the P less than 10MPa and the medium flow velocity V less than 3 m/s.
Example 2
As shown in fig. 4, the difference between the example 2 and the example 1 is that a plurality of skeleton layers 4 are arranged in the soft coating layer 3, so that the purpose is to adjust the number of skeleton layers according to the density of the medium in the condenser without changing the optimal torsion ratio of the outer soft coating layer, so that the overall density of the double-layer spiral band is always critical to the density of the medium, that is, under the action of the multi-directional force of the fluid, the floating effect of the double-layer spiral band in the medium can be ensured, the double-layer spiral band can better float at the middle position of the heat exchange tube, and the probability that the double-layer spiral band contacts the inner wall of the heat exchange tube when rotating is avoided.
Example 3
Example 3 example 1 is different in that the framework layer 4 is a metal strip, such as an iron strip and a steel strip, preferably a stainless steel strip, and the soft coating layer is sprayed on the framework layer, so that the flexibility of the metal strip framework layer 4 is smaller, and the flexibility displacement is smaller when the heat exchanger is installed and used for a long distance, i.e. the rotating effect of the double-layer spiral band 2 in the heat exchanger tube can be better ensured.
It should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used broadly in the present invention, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics in the schemes is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several variations and modifications can be made, which should also be considered as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the utility of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (9)
1. The double-layer spiral band comprises a band body and is characterized in that the band body comprises a framework layer and a soft coating layer, the framework layer is positioned in the soft coating layer, and the soft coating layer completely coats the framework layer; the link body is formed by rotating and twisting around the length axis of the link body, the soft coating layer and the framework layer are formed by co-extrusion, and a medium drives the link body to rotate when flowing along the link body; the hardness of the framework layer is greater than that of the soft coating layer, the density of the framework layer is different from that of the soft coating layer, and the framework layer is attached to the soft coating layer; the surface of the soft coating layer is smooth, and when the soft coating layer is used, the distance between the ligament body and the inner wall of the pipe is 0.1mm-5mm.
2. The double-layer helical tie of claim 1, wherein said soft coating layer is a fluoroplastic; the framework layer is made of high polymer materials.
3. The double-layer helical ligament of claim 2, wherein both end ends of the ligament body are subjected to a sealing treatment.
4. The double-layer spiral tie as claimed in claim 1 or 2, wherein the width of the soft coating layer of the tie body is 14 to 60mm, the thickness of the skeleton layer is 0.5 to 2mm, and the thickness of the soft coating layer coating material in the thickness direction of the skeleton layer is 0.25 to 0.8mm; solid wrapping edges are arranged on the two sides of the soft coating layer, and the width of each wrapping edge is 0.1-5 mm.
5. The double-layer helical ligament of claim 1, wherein the ligament body has a pitch to width ratio of 1.5 or greater.
6. The double-layer helical tie of claim 1, wherein at least one of the carcass layers is disposed inside a soft coating layer; the framework layer is dark, and the soft coating layer is transparent or light.
7. The double-layer helical ligament of claim 1, wherein the service life is at least 1 year in an extreme environment with a pH of less than 1 or greater than 13, a T of less than 200 ℃, a P of less than 10MPa, and a media flow rate V of less than 3 m/s.
8. Double-deck vortex device adopts double-deck spiral tie as claim 1, characterized in that, includes connector and double-deck spiral tie, the connector includes chucking support and pivot, the chucking support chucking is at the tip of heat exchange tube, the pivot sets up the inside at the chucking stabilizer blade, the tip of double-deck spiral tie and the one end fixed connection of pivot.
9. The dual-layer flow disturbing device as claimed in claim 8, wherein a sealing sleeve is provided at an outer side of a connecting portion between the tie body and the rotating shaft for completely covering the connecting portion therebetween.
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| CN202110626250.6A CN113310330B (en) | 2021-06-04 | 2021-06-04 | Double-layer spiral band and double-layer turbulence device |
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| CN202110626250.6A CN113310330B (en) | 2021-06-04 | 2021-06-04 | Double-layer spiral band and double-layer turbulence device |
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| CN113310330B true CN113310330B (en) | 2022-11-25 |
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