CN210464176U

CN210464176U - Heat exchange tube and heat exchanger with same

Info

Publication number: CN210464176U
Application number: CN201920617411.3U
Authority: CN
Inventors: 张宏伟; 许永伟
Original assignee: Luoyang Mingyuan Petrochemical Industry Technology Co ltd
Current assignee: Luoyang Mingyuan Petrochemical Industry Technology Co ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-05-05
Anticipated expiration: 2029-04-30

Abstract

The application discloses heat exchange tube and have heat exchanger of this heat exchange tube. The heat exchange tube includes two glass plates disposed oppositely and side bars disposed between side edges of both sides of the two glass plates, wherein the side bars have different cross-sectional shapes in the length direction thereof so that the middle sections of the side bars are sandwiched between the two glass plates while a part of the ends of the side bars are sandwiched between the glass plates and the other parts protrude from between the glass plates and block the sides of the glass plates. According to the utility model discloses, through the side blend stop that adopts the cross section to change, reduced the processing degree of difficulty and the manufacturing cost of side blend stop on the one hand, on the other hand has improved the sealing performance of heat exchange tube.

Description

Heat exchange tube and heat exchanger with same

Technical Field

The present invention relates generally to heat exchange equipment, and more particularly to a heat exchange tube suitable for low temperature dew point corrosive environments and including the same.

Background

The glass material has the advantages of corrosion resistance, friction resistance and the like, and can be used for heat exchange elements of heat exchangers; but the mechanical property is poor, mainly the brittleness is large, the impact resistance is poor, and the application of the glass in the structure of the heat exchange equipment is greatly limited. On the contrary, metal materials generally have poor corrosion resistance, but good plasticity, toughness and impact resistance. Therefore, the glass material and the metal material are hopefully combined and applied to the heat exchange equipment. One problem of the application of glass in the heat exchange element is that the connection and sealing between the glass heat exchange element and the metal component are difficult, and the sealing between the glass heat exchange element and the metal frame cannot be completely guaranteed in the prior art. Therefore, the development of the glass heat exchange element with improved sealing performance has good economic and social benefits.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a heat exchange tube and including the heat exchanger of this heat exchange tube, it has improved the sealing performance of heat exchange tube.

According to an aspect of the present invention, there is provided a heat exchange tube comprising two glass plates disposed opposite to each other and a side barrier disposed between side edges of both sides of the two glass plates, wherein the side barrier has different cross-sectional shapes in a length direction thereof, so that a middle section of the side barrier is held between the two glass plates, and a part of an end portion of the side barrier is held between the glass plates and the other part thereof is protruded between the glass plates and sealed on a side surface of the glass plates.

Preferably, the side bars have a substantially rectangular cross-sectional shape at a mid-section thereof, the portion of the end portions of the side bars having a substantially rectangular cross-sectional shape, the other portion having an outer side surface protruding in a circular arc shape and forming a smooth transition with the outer plane of the glass sheet.

In some preferred embodiments, the side barrier strips are bonded to the glass plate by an elastic sealant layer, and the heat exchange tube further includes an anti-corrosion layer covering the side barrier strips and the outer sides of the elastic sealant layer at least at a middle section of the side barrier strips.

In some embodiments, the corrosion protection layer is at least partially filled between the glass sheets.

In some embodiments, the side bars are bonded to the glass sheet by a layer of corrosion resistant elastomeric sealant covering the outside of the side bars at least at the midsection of the side bars.

In some embodiments, the heat exchange tube may further include at least one of a reinforcing rib and support pillars disposed between the side bars on both sides, wherein the reinforcing rib extends along substantially the entire length of the side bars, and the support pillars are disposed at intervals in the length direction of the side bars.

Preferably, the heat exchange tube further comprises a heat transfer enhancement member bonded to the outer surface of the glass plate by a heat conductive paste.

According to another aspect of the utility model, a heat exchanger is provided, it includes: a housing having a first fluid inlet, a first fluid outlet, a second fluid inlet, and a second fluid outlet formed thereon, the first fluid inlet and the first fluid outlet being disposed opposite to each other; a first tube plate and a second tube plate which are provided at the first fluid inlet and the first fluid outlet, respectively, and are formed with mounting through-holes; and two ends of the heat exchange tube are respectively and hermetically arranged in the installation through holes of the first tube plate and the second tube plate, wherein the heat exchange tube is as described above.

In some embodiments, a sealant is filled between the inner walls of the mounting through holes of the first and second tube plates and the end of the heat exchange tube and an elastic sealing ring is disposed, and the sealant surrounds the elastic sealing ring.

Preferably, the heat exchanger may further include a support plate disposed inside the first and second tube sheets, the support plate having support holes corresponding to the mounting through-holes, the ends of the heat exchange tubes being supported in the support holes of the support plate.

Alternatively or additionally, an additional elastic sealing ring can be arranged between the inner wall of the mounting through hole of the first tube plate and the inner wall of the mounting through hole of the second tube plate and the end part of the heat exchange tube, wherein the additional elastic sealing ring is smaller than the elastic sealing ring and is positioned on one side of the elastic sealing ring, which is closer to the interior of the heat exchanger.

In some embodiments, the heat exchanger may further include a support grid disposed between the first and second tube sheets for supporting the heat exchange tubes, the support grid including support bars and support rods arranged in a grid pattern, wherein outer surfaces of the support rods have a non-metallic corrosion protection layer disposed by spraying or sheathing.

According to the utility model discloses, adopt the glass material to make the heat exchange tube, its corrosion resistance is strong, meanwhile, through the side blend stop that adopts the cross section to change in this heat exchange tube, has reduced the processing degree of difficulty and manufacturing cost on the one hand, and on the other hand has improved the leakproofness of glass material's heat exchange tube with the heat exchanger tube sheet junction.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

fig. 1 is a schematic diagram of an example of a heat exchange tube according to an embodiment of the present invention;

FIGS. 2(a) and 2(B) are cross-sectional illustrations of the heat exchange tube of FIG. 1 taken at positions A-A and B-B, respectively;

FIGS. 3(a) and 3(b) each schematically illustrate different examples of side bars that may be used with the heat exchange tube of FIG. 1;

FIG. 4(a), FIG. 4(b), FIG. 4(c) and FIG. 4(d) schematically illustrate cross-sections of the side bars shown in FIG. 3(a) and FIG. 3(b), respectively, taken at different locations;

FIG. 5 is an enlarged partial schematic view of the heat exchange tube of FIG. 2(a) showing the attachment and sealing structure between the side bars and the glass sheets;

fig. 6 is a schematic structural diagram of a heat exchanger according to an embodiment of the present invention;

fig. 7 and 8 are schematic views of different examples of sealing structures between heat exchange tubes and tube sheets in the heat exchanger shown in fig. 6;

FIG. 9 is a schematic structural view of an example of a support grid in the heat exchanger of FIG. 6;

fig. 10 is a partially enlarged schematic view of the support rods of the support grid of fig. 9.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

A heat exchange tube according to the present invention will be described first with reference to fig. 1 to 5.

Fig. 1 is a schematic view of an example of a heat exchange tube according to an embodiment of the present invention, and fig. 2(a) and 2(B) are cross-sectional examples of the heat exchange tube shown in fig. 1 taken at positions a-a and B-B, respectively. As shown in fig. 1, 2(a) and 2(b), a heat exchange tube 10 according to an embodiment of the present invention includes two glass plates 11 disposed opposite to each other and a side barrier 12 disposed between side edges of both sides of the two glass plates. The glass plate 11 and the side bars 12 enclose a channel through which a heat exchange medium passes.

The section a-a and the section B-B shown in fig. 2(a) and 2(B) are taken from the position a and the position B shown in fig. 1, respectively. It can be seen that the side bars 12 have different cross-sectional shapes along their length. Wherein the middle section of the side bars 12 is clamped between the two glass plates 11 as shown in section a-a; as shown in section B-B, one part of the end of the side bars 12 is clamped between the glass sheets 11 and the other part protrudes from between the glass sheets 11 and seals against the side of the glass sheets 11.

Fig. 3(a), 3(b) and 4(a), 4(b), 4(c), 4(d) schematically show different examples of the side bars 12, wherein fig. 4(a), 4(b), 4(c) and 4(d) schematically show cross-sections of the side bars shown in fig. 3(a), 3(b) taken at different positions.

As can be seen in connection with the above figures, in some preferred embodiments, the mid-section of the side bars 12 may have a generally rectangular cross-sectional shape; one

portion

12a, 12a 'of the end of the side bar 12 may have a generally rectangular cross-sectional shape and the other portion 12B, 12B' may have an outer side surface that protrudes in a circular arc shape and forms a smooth transition with the outer plane of the glass sheet (see section B-B of fig. 2 (B)). For example, the cross-sectional shape of the middle section of the side barrier 12 may be a rectangle, and the cross-sectional shape of the end section may be a geometric shape composed of a rectangle and a semicircle, wherein the rectangle coincides with the geometric center line of the semicircle, and the diameter of the semicircle is larger than the side length of the side connected with the rectangle.

In addition, as shown in the section E-E and the section G-G in fig. 4(b) and 4(d), the side bars 12 may be integrally formed or may be formed by splicing; in the case of the split molding, the form is not limited to the division shown in the section G-G.

The side bars 12 may be made of metal, non-metal, or a combination thereof. In the case where the side bars 12 are formed as a splice, the two parts of the splice may be formed of different materials. Preferably, the side bars 12 are made of glass.

In the heat exchange tube according to the embodiment of the present invention, the side barrier is provided with a structure protruding from the glass plate, especially a protruding structure (for example, a semicircular structure) having a circular arc outer side surface in smooth transition with an outer side plane of the glass plate, so as to be easily in close contact with the heat exchanger tube plate and the sealing material, thereby forming an effective sealing joint. On the other hand, the side blocking strip has different cross sections in the length direction, so that a protruding structure is arranged at the end part, and the problems of complex processing and high cost caused by processing and forming a circular arc surface on the full length of one side of the side blocking strip are solved.

Fig. 5 is an enlarged schematic view of a part of the heat exchange tube indicated by an arrow C in fig. 2(a), showing the connection and sealing structure between the side barrier 12 and the glass plate 11. In the example shown in fig. 5, the side barrier strips 12 are bonded to the glass plates 11 on both sides by the elastic sealant layer 15, and the heat exchange tube 10 may further include an anticorrosive layer 16, the anticorrosive layer 16 covering the side barrier strips 12 and the outer sides of the elastic sealant layer 15 at least at the middle section of the side barrier strips 12. The corrosion protection layer 16 preferably also covers the sides of the glass plate 11. Further, as shown in fig. 5, the corrosion prevention layer 16 is preferably at least partially filled between the glass plates 11, which contributes to improving the adhesion strength of the corrosion prevention layer, thereby enhancing the corrosion prevention effect of the entire heat exchange tube.

The elastic sealant layer 15 is a bonding layer formed of a sealant having good elasticity. The corrosion-resistant layer 16 is preferably a corrosion-resistant layer formed of a sealant having good corrosion resistance; it should be understood, however, that the corrosion protection layer 16 is not limited to a glue layer, and may be formed of other corrosion protection materials having some flexibility. The corrosion protection layer 16 prevents corrosive media from corroding the elastic sealant layer 15.

Although not shown, in other embodiments of the invention, it is also possible to bond the side bars 12 to the glass pane 11 with only one layer of anti-corrosive elastic sealant covering the outside of the side bars at least in the middle section of said side bars. In other words, the corrosion resistant elastomeric sealant layer acts as both an adhesive layer and a corrosion resistant layer.

Preferably, both the elastomeric sealant layer and the corrosion resistant layer are temperature resistant.

It can be seen that the heat exchange tube 10 is made by adhesive bonding, which avoids the complex processes of melting, drawing, shaping, cutting and grinding, etc. required by the traditional glass tube, and has the advantages of simple processing equipment, concise manufacturing process and low cost. Moreover, the heat exchange tube 10 has improved corrosion resistance by adopting a double-layer structure of the elastic sealant layer and the anticorrosive layer.

Referring back to fig. 1 and 2(a), 2(b), it can be seen that the heat exchange tube 10 according to the embodiment of the present invention may further include reinforcing ribs 13a and supporting columns 13b disposed between the side barrier bars 12 on both sides. The reinforcing rib 13a extends along substantially the entire length of the side barrier 12; the supporting columns 13b are columnar and are arranged at intervals in the longitudinal direction of the side barrier strips 12. The supporting column 13b may be a cylinder having an elliptical cross section whose major axis direction coincides with the length direction of the side barrier 12. The reinforcing ribs 13a, the supporting columns 13b and the glass plate 11 can be connected by high-temperature-resistant elastic adhesive. The heat exchange pipe 10 may also include only one of the reinforcing ribs 13a and the supporting columns 13 b.

In addition, as shown in fig. 1 and fig. 2(a) and 2(b), the heat exchange tube 10 may further include a heat transfer enhancing member 14, and the heat transfer enhancing member 14 may be adhered to the outer side plane of the glass plate 11 by a heat conductive adhesive.

A heat exchanger according to the present invention will be described next with reference to fig. 6 to 10.

Fig. 6 is a schematic structural diagram of a heat exchanger according to an embodiment of the present invention. As shown, the heat exchanger 1 includes a shell 1, and a tube sheet 2 and heat exchange tubes 10 disposed inside the shell 1. The housing 1 is formed with a first fluid inlet 1a, a first fluid outlet 1b, a second fluid inlet 1c and a second fluid outlet 1d, wherein the first fluid inlet 1a and the first fluid outlet 1b are oppositely disposed. The tube plate 2 includes a first tube plate and a second tube plate provided at the first fluid inlet 1a and the first fluid outlet 1b, respectively, with mounting through-holes 2a formed thereon (see fig. 7 and 8). Both ends of the heat exchange tube 10 are sealingly installed in the installation through-holes 2a of the first and second tube sheets 2, respectively. The heat exchange tube 10 is the heat exchange tube according to the embodiment of the present invention described above.

Fig. 7 and 8 are enlarged schematic views of a part indicated by an arrow H in fig. 6, showing different examples of a sealing structure between a heat exchange tube and a tube plate in the heat exchanger.

As shown in fig. 7 and 8, a sealant 4 is filled between the inner walls of the installation through holes 2a of the first and second tube plates 2 and the ends of the heat exchange tubes 10, and an elastic sealing ring 5 is provided and surrounds the elastic sealing ring. The structure can improve the sealing strength and has good sealing performance. The material of the elastic seal ring 5 is preferably silicone rubber or fluorine rubber, but is not limited thereto.

In the example shown in fig. 7, the heat exchanger 1 further comprises a support plate 6 arranged inside the first and second tube sheets 2. The support plate 6 has support holes 6a corresponding to the mounting through-holes 2a, and the ends of the heat exchange tubes 10 are supported in the support holes 6a of the support plate 6. The supporting plate 6 is used for ensuring a certain gap between the heat exchange tube 10 and the installation through hole 2a of the tube plate 2 when the heat exchange tube 10 is installed, so as to fill the sealant 4. When the heat exchange tube 10 is installed, the sealant 4 is filled between the installation through hole 2a of the tube plate 2 and the heat exchange tube 10, then the elastic sealing ring 5 is filled, and finally the sealant 4 is filled again.

In the example shown in fig. 8, two elastic seal rings 5, i.e., a large elastic seal ring 5a and a small elastic seal ring 5b, are provided. Preferably, as shown in fig. 8, the small elastic sealing ring 5b is located on the side of the large elastic sealing ring 5a closer to the inside of the heat exchanger. The small elastic sealing ring 5b may replace the supporting plate 6 for ensuring that there is enough gap for filling the sealant between the heat exchange tube 10 and the inner wall of the installation through-hole 2a when the heat exchange tube 10 is installed.

According to the utility model discloses heat exchanger has adopted flexonics and sealed in the mounting structure between heat exchange tube and tube sheet, has improved seal strength and sealing performance.

Referring back to fig. 6, the heat exchanger 1 may further include a support grid 3 disposed between the first and second tube sheets 2 for supporting the heat exchange tubes 10. As shown in fig. 9, the support grid 3 comprises support crossbars 31 and support bars 32 arranged in a grid-like manner. Fig. 10 is an enlarged view of a portion indicated by an arrow K in fig. 9. As shown in fig. 10, the outer surface of the support rod 32 has a non-metal corrosion prevention protection layer 32a provided by spraying or sheathing. The protective layer 32a is preferably resistant to high temperatures. The protective layer 32a is preferably made of high temperature resistant plastic, and may be formed by direct sheathing of plastic pipes, or by spraying of an anticorrosive material.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. A heat exchange tube comprising two glass plates disposed oppositely and side bars disposed between side edges of both sides of the two glass plates, characterized in that the side bars have different cross-sectional shapes in the length direction thereof so that the middle section of the side bars is sandwiched between the two glass plates while a part of the ends of the side bars is sandwiched between the glass plates and the other part protrudes from between the glass plates and is blocked on the sides of the glass plates.

2. The heat exchange tube as recited in claim 1, wherein the middle section of the side bar has a substantially rectangular cross-sectional shape, said one portion of the end portion of the side bar has a substantially rectangular cross-sectional shape, and said other portion has an outer side surface projecting in a circular arc shape and forming a smooth transition with the outer plane of the glass sheet.

3. The heat exchange tube according to claim 1 or 2, wherein the side barrier strips are bonded to the glass plate by an elastic sealant layer, and the heat exchange tube further comprises an anticorrosive layer covering the side barrier strips and the outer sides of the elastic sealant layer at least at the middle sections of the side barrier strips.

4. The heat exchange tube of claim 3, wherein the corrosion resistant layer is at least partially filled between the glass sheets.

5. The heat exchange tube according to claim 1 or 2, wherein the side barrier strips are bonded to the glass plate by an anticorrosive elastic sealant layer covering the outer sides of the side barrier strips at least at the middle sections of the side barrier strips.

6. The heat exchange tube according to claim 1 or 2, further comprising at least one of a reinforcing rib and supporting columns provided between the side bars on both sides, wherein the reinforcing rib extends along substantially the entire length of the side bars, and the supporting columns are provided at intervals in the length direction of the side bars.

7. The heat exchange tube of claim 6, further comprising a heat-strengthening member bonded to the outer surface of the glass plate by a heat conductive paste.

8. A heat exchanger, comprising:

a housing having a first fluid inlet, a first fluid outlet, a second fluid inlet, and a second fluid outlet formed thereon, the first fluid inlet and the first fluid outlet being disposed opposite to each other;

a first tube plate and a second tube plate which are provided at the first fluid inlet and the first fluid outlet, respectively, and are formed with mounting through-holes; and

the two ends of the heat exchange tube are respectively and hermetically arranged in the installation through holes of the first tube plate and the second tube plate,

wherein the heat exchange tube is a heat exchange tube according to any one of claims 1 to 7.

9. The heat exchanger as claimed in claim 8, wherein a sealant is filled between the inner walls of the mounting through holes of the first and second tube sheets and the ends of the heat exchange tubes and an elastic sealing ring is provided, the sealant surrounding the elastic sealing ring.

10. The heat exchanger as claimed in claim 9, further comprising a support plate disposed inside the first and second tube sheets, the support plate having support holes corresponding to the mounting through-holes, the heat exchange tubes having ends supported in the support holes of the support plate.

11. A heat exchanger as recited in claim 9 wherein an additional elastic seal ring is further provided between the inner walls of the mounting through holes of the first and second tube sheets and the end portion of the heat exchange tube, the additional elastic seal ring being smaller relative to the elastic seal ring and being located on a side of the elastic seal ring closer to the interior of the heat exchanger.

12. The heat exchanger of claim 8, further comprising a support grid disposed between the first and second tube sheets for supporting the heat exchange tubes, the support grid comprising support crossbars and support rods arranged in a grid pattern, wherein the outer surface of the support rods has a non-metallic anti-corrosion protective layer disposed by spraying or sheathing.