CN212778788U - Plate-fin heat exchanger of brazing composite coil pipe - Google Patents

Abstract

The plate-fin heat exchanger of the brazing composite coil comprises a plate bundle body (1), wherein the plate bundle body (1) is formed by alternately stacking two or more layer channel units, and is characterized in that: at least one of the two or more layer channel units is a coil layer channel unit (11), the coil layer channel unit (11) comprises a first clamping plate (111), a second clamping plate (112) and a coil (113) arranged between the first clamping plate (111) and the second clamping plate (112), the first clamping plate (111) is formed by splicing a plurality of same first battens (1111) on the same plane, and the second clamping plate (112) is formed by splicing a plurality of same second battens (1121) on the same plane; the first clamping plate (111), the second clamping plate (112) and the coil (113) of the coil layer channel unit (11) are integrally brazed and formed into a whole.

Description

Plate-fin heat exchanger of brazing composite coil pipe

Technical Field

The utility model relates to a plate-fin heat exchanger, concretely relates to compound coil pipe's of brazing plate-fin heat exchanger.

Background

The plate-fin heat exchanger is a high-efficiency heat exchanger using fins as heat transfer elements, and has the characteristics of high heat transfer efficiency, compact structure, expandable heat exchange channel number, large adaptability, light weight and the like, so that the plate-fin heat exchanger is widely applied to heat exchange equipment with two or more of gas-gas, gas-liquid and liquid-liquid, and is generally applied to the field of air separation equipment at present.

In the prior art, reference can be made to the technical standard "NB/T47006-2019 aluminum plate-fin heat exchanger", the standard plate-fin heat exchanger is composed of accessories such as a plate bundle body, a seal head, a connecting pipe, a support and the like, and the plate bundle body is formed by alternately stacking and integrally brazing more than two layers of channel units. Taking two layers of channel units as examples, the first layer channel unit and the second layer channel unit are composed of fins, flow deflectors, seals and partition plates, fluid inlets and outlets of the two layer channel units are led out from the circumferential side edges of the two layer channel units in different directions, then upper seal heads are welded on the side portions of the plate bundle body along the thickness direction to accommodate the fluid inlets and the fluid outlets of the same layer channel units, and respective connecting pipes are welded on the seal heads to serve as a total inlet and an outlet, so that the heat exchanger is formed.

However, because the channel of the existing plate-fin heat exchanger is composed of aluminum fins, the strength of the aluminum material is obviously reduced at the temperature of more than 60 ℃, and the aluminum material is also not corrosion-resistant, so that the existing plate-fin heat exchanger is not pressure-resistant, high temperature-resistant, corrosion-resistant and easy to block, can bear 15Mpa at most, and is limited in use occasions. Therefore, coil heat exchangers with high cost and much lower heat transfer efficiency can be adopted in the market under the conditions of high pressure, high temperature or corrosive fluid.

Disclosure of Invention

The utility model aims at providing a compound coil pipe's of brazing plate-fin heat exchanger makes it be applicable to high pressure, high temperature or corrosive fluids on the basis of having former plate-fin heat exchanger's high heat exchange efficiency advantage.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a plate-fin heat exchanger of a brazing composite coil comprises a plate bundle body formed by integral brazing, wherein the plate bundle body is formed by alternately superposing more than two layers of channel units, at least one of the more than two layers of channel units is a coil layer channel unit, the coil layer channel unit comprises a first clamping plate, a second clamping plate and a coil arranged between the first clamping plate and the second clamping plate, grooves are formed in the first clamping plate and the second clamping plate corresponding to the coil, and the coil is accommodated in the grooves of the first clamping plate and the second clamping plate; the first splint is formed by splicing a plurality of same first battens on the same plane, and the second splint is formed by splicing a plurality of same second battens on the same plane;

before the integral brazing forming, brazing foil is arranged between the first clamping plate and the second clamping plate, and the first clamping plate and the second clamping plate are in brazing connection after the integral brazing forming, so that the first clamping plate, the second clamping plate and the coil pipe of the coil pipe layer channel unit are integrated.

In the above scheme, before the shaping of whole brazing, be equipped with first brazing foil at first splint and coil pipe interval, coil pipe and second splint interval are equipped with the second brazing foil, and first brazing foil and second brazing foil are whole flaky sheet, and the coil pipe has carried out cladding material for the material that can braze or coil pipe surface and has handled to this whole brazing shaping back is between the groove cell wall of first splint and the coil pipe, between the groove cell wall of second splint and the coil pipe and all be brazed between first splint and the second splint and be connected.

In the above scheme, before the integral brazing forming, a third brazing foil is arranged between the adjacent first battens of the first clamping plate, and a fourth brazing foil is arranged between the adjacent second battens of the second clamping plate, so that the first battens of the first clamping plate are in brazing connection after the integral brazing forming, and the second battens of the second clamping plate are also in brazing connection.

In the above scheme, the coil pipe is an S-shaped coil pipe, the S-shaped coil pipe is formed by winding a pipe body in an S-shape on a plane, the S-shaped coil pipe body is formed by a plurality of straight pipe sections and a plurality of elbow sections, the groove of the first clamping plate is a straight groove formed corresponding to each straight pipe section of the S-shaped coil pipe, the groove of the second clamping plate is a straight groove formed corresponding to each straight pipe section of the S-shaped coil pipe, and the elbow section of the S-shaped coil pipe is exposed out of the side edges of the first clamping plate and the second clamping plate.

In the above scheme, the coil pipe is formed by coiling a single pipe body on a plane.

In the scheme, the coil pipe is formed by coiling a plurality of pipe bodies leaning in parallel on a plane.

In the above scheme, the other passage units of the plate bundle body except the coil pipe layer passage unit can adopt the existing common layer passage unit composed of fins, flow deflectors, seals and partition plates.

Based on above technical scheme, the utility model discloses following advantage and effect have:

the utility model discloses breakthroughly reform transform a layer channel unit in the current plate-fin heat exchanger into a coil layer channel unit mainly composed of coil pipes, the pressure resistance of the coil pipe is improved due to the controlled structure of the coil pipe, and the smooth pipe wall in the coil pipe can resist deposition and is not easy to block; and, the coil pipe can be fixed with the centre gripping mode through first splint and second splint, so the material selection of coil pipe need not consider brazing, makes the coil pipe material selection range widen greatly, can adopt the material (such as copper product, high temperature resistant plastics, stainless steel, titanium etc.) other than aluminium system to can further promote its withstand voltage, temperature resistance or corrosion resistance. When the heat exchanger is used, high-temperature, high-pressure or corrosive fluid can be introduced into the channel unit of the coil layer, and the application range is successfully expanded on the basis of having the advantage of high heat exchange efficiency of the original plate-fin heat exchanger.

And because the first splint is formed by splicing a plurality of same first battens, the second splint is formed by splicing a plurality of same second battens, and the first battens and the second battens can be made of sectional materials, the manufacture is convenient and the cost is low.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of the present invention;

FIG. 2 is an exploded view of a coil pipe layer channel unit according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a common layer channel unit according to an embodiment of the present invention;

fig. 4 is a schematic perspective view of a second embodiment of the present invention.

In the above drawings: 1. a plate bundle body; 11. a coil layer channel unit; 111. a first cleat 1111, a first plank; 11111. a groove; 112. a second splint; 1121. a second panel; 11211. a groove; 113. a coil pipe; 114. a first brazing foil; 115. A second brazing foil; 12. a common layer channel unit; 121. a fin; 122. a flow deflector; 123. a seal; 124. a partition plate; 2. and (5) sealing the head.

Detailed Description

The invention will be further described with reference to the following drawings and examples:

the first embodiment is as follows: referring to FIGS. 1-3:

a plate-fin heat exchanger of a brazing composite coil comprises a plate bundle body 1 formed by integral brazing and a seal head 2 arranged on the plate bundle body 1.

Referring to fig. 1 to 3, the plate bundle body 1 is formed by alternately stacking more than two layers of channel units, and at least one of the more than two layers of channel units is a coil layer channel unit 11. The coil layer channel unit 11 is shown in fig. 1 and 2, and includes a first clamping plate 111, a second clamping plate 112, and a coil 113 disposed between the first clamping plate 111 and the second clamping plate 112. The coil 113 is formed by winding a pipe body on a plane. The first clamping plate 111 and the second clamping plate 112 are provided with grooves 11111 corresponding to the coil pipe 113, and the coil pipe 113 is accommodated in the grooves 11211 of the first clamping plate 111 and the second clamping plate 112.

Referring to fig. 1 and 2, the first splint 111 is formed by splicing a plurality of identical first laths 1111 together in the same plane, and the second splint 112 is formed by splicing a plurality of identical second laths 1121 together in the same plane.

Before the integral brazing forming, a brazing foil is arranged between the first clamping plate 111 and the second clamping plate 112, so that the first clamping plate 111 and the second clamping plate 112 are brazed and connected after the integral brazing forming, and the first clamping plate 111, the second clamping plate 112 and the coil 113 of the coil layer channel unit 11 are integrated.

The first clamping plate 111, the second clamping plate 112 and the coil 113 are integrated, and in a specific case, for example, only the joint of the first clamping plate 111 and the second clamping plate 112 is provided with a brazing foil, so that the joint of the first clamping plate 111 and the second clamping plate 112 is brazed after brazing, and the coil 113 is clamped and fixed in a clamping manner; alternatively, the entire surface of the first clamping plate 111 is provided with the brazing foil, and the coil 113 is made of a brazeable material (such as aluminum) or the surface of the coil 113 is plated, so that the groove 11111 of the first clamping plate 111 and the coil 113, and the first clamping plate 111 and the second clamping plate 112 are connected by brazing after the integral brazing molding.

The following is a preferred scheme: before the integral brazing forming, a first brazing foil 114 is arranged between the first clamping plate 111 and the coil 113 at an interval, a second brazing foil 115 is arranged between the coil 113 and the second clamping plate 112 at an interval, the first brazing foil 114 and the second brazing foil 115 are both integral sheet-shaped sheets, the coil 113 is plated by using a brazing material (such as aluminum) or the surface of the coil 113, and after the integral brazing forming, the groove 11111 groove wall of the first clamping plate 111 and the coil 113, the groove 11211 groove wall of the second clamping plate 112 and the coil 113, and the first clamping plate 111 and the second clamping plate 112 are all in brazing connection. In practice, when the coil 113 is made of a material which is not easy to be brazed, the coil 113 may be held and fixed by the first clamping plate 111 and the second clamping plate 112 after the integral brazing process.

In the case where the coil 113 is held and fixed by the first and second clamping plates 111 and 112, the contact surfaces between the first and second clamping plates 111 and 112 and the coil 113 are secured as long as they are closely fitted, and the heat transfer efficiency is still ensured even in practice by filling heat conductive adhesive between the contact surfaces to improve the heat transfer efficiency.

Before the integral brazing, a third brazing foil is disposed between the adjacent first laths 1111 of the first clamping plate 111, and a fourth brazing foil is disposed between the adjacent second laths 1121 of the second clamping plate 112, so that the first laths 1111 of the first clamping plate 111 are brazed to each other, and the second laths 1121 of the second clamping plate 112 are brazed to each other after the integral brazing.

Of course, it is also possible to practically eliminate the third brazing foil and the fourth brazing foil, and there is no direct fixation between the adjacent first laths 1111 of the first clamping plate 111, or there is no direct fixation between the adjacent second laths 1121 of the second clamping plate 112, and each of the first laths 1111 and the second laths 1121 achieves the effect of indirect fixation by brazing to the partition plates 124 of the adjacent common layer channel units 12.

Referring to fig. 1 to 3, the coil pipe 113 is an S-shaped coil pipe, the S-shaped coil pipe is formed by winding a pipe body in an S-shape on a plane, the S-shaped coil pipe body is formed by a plurality of straight pipe sections and a plurality of elbow sections, the groove 11111 of the first clamping plate 111 is a straight groove formed corresponding to each straight pipe section of the S-shaped coil pipe, the groove 11211 of the second clamping plate 112 is also a straight groove formed corresponding to each straight pipe section of the S-shaped coil pipe, and the elbow section of the S-shaped coil pipe is exposed outside the side edges of the first clamping plate 111 and the second clamping plate 112.

In order to facilitate the production and reduce the cost, it is preferable that the first strip 1111 and the second strip 1121 be formed by processing aluminum profiles.

Besides the coil layer passage unit 11, the other passage units may adopt the conventional common layer passage unit 12 composed of fins 121, baffles 122, seals 123 and partitions 124, as shown in fig. 4.

The material of the coil 113 of this embodiment is selected without considering brazing, and materials other than aluminum (such as copper, high temperature plastic, stainless steel, titanium, etc.) may be used, so as to further improve the pressure resistance, temperature resistance, or corrosion resistance. When the heat exchanger is used, high-temperature, high-pressure or corrosive fluid can be introduced into the coil layer channel unit 11, and low-pressure fluid without special requirements can be introduced into the common layer channel unit 12, namely, the application range is successfully expanded on the basis of having the advantage of high heat exchange efficiency of the original plate-fin heat exchanger.

In the first embodiment, the following variations are also possible:

1. the coil 113 can also be coiled in other forms, such as circular coiling or other arbitrary winding;

2. when the coil pipe 113 is an S-shaped coil pipe, the first clamping plate 111 and the second clamping plate 112 may also be provided with a curved groove section corresponding to the elbow section thereof, so as to entirely cover the S-shaped coil pipe inside the first clamping plate 111 and the second clamping plate 112, so that the elbow section is not exposed, and thus the heat transfer area is large, but the production difficulty is increased.

Example two: referring to FIG. 4:

the plate-fin heat exchanger of the brazing composite coil comprises a plate bundle body 1 formed by integral brazing and a seal head 2 arranged on the plate bundle body 1, and is different from the embodiment in that: the coil 113 is formed by winding a plurality of tubes leaning against one another in a planar manner. The rest is the same as the first embodiment, and is not described herein again.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (6)

1. The utility model provides a compound coil's of brazing plate-fin heat exchanger, includes that a whole brazing fashioned plate restraints body (1), and this plate restraints body (1) is overlapped in turn by the layer passageway unit more than two kinds and is constituteed, its characterized in that: at least one of the more than two layer channel units is a coil layer channel unit (11), the coil layer channel unit (11) comprises a first clamping plate (111), a second clamping plate (112) and a coil (113) arranged between the first clamping plate (111) and the second clamping plate (112), grooves are formed in the first clamping plate (111) and the second clamping plate (112) corresponding to the coil (113), and the coil (113) is accommodated in the grooves of the first clamping plate (111) and the second clamping plate (112); the first splint (111) is formed by splicing a plurality of same first laths (1111) on the same plane, and the second splint (112) is formed by splicing a plurality of same second laths (1121) on the same plane;

before integral brazing forming, brazing foil is arranged between the first clamping plate (111) and the second clamping plate (112), and after integral brazing forming, the first clamping plate (111) and the second clamping plate (112) are in brazing connection, so that the first clamping plate (111), the second clamping plate (112) and the coil pipe (113) of the coil pipe layer channel unit (11) are integrated.

2. The plate fin heat exchanger of the brazed composite coil of claim 1, wherein: before the integral brazing forming, first brazing foils (114) are arranged between a first clamping plate (111) and a coil pipe (113) at intervals, second brazing foils (115) are arranged between the coil pipe (113) and a second clamping plate (112) at intervals, the first brazing foils (114) and the second brazing foils (115) are both sheet materials in a whole sheet shape, the coil pipe (113) is made of a material capable of being brazed or the surface of the coil pipe (113) is subjected to plating treatment, and after the integral brazing forming, the groove wall (11111) of the first clamping plate (111) is in brazing connection with the coil pipe (113), the groove wall (11211) of the second clamping plate (112) is in brazing connection with the coil pipe (113), and the first clamping plate (111) is in brazing connection with the second clamping plate (112).

3. The plate fin heat exchanger of the brazed composite coil of claim 1, wherein: before the integral brazing forming, a third brazing foil is arranged between the adjacent first laths (1111) of the first clamping plate (111), and a fourth brazing foil is arranged between the adjacent second laths (1121) of the second clamping plate (112), so that the first laths (1111) of the first clamping plate (111) are in brazing connection after the integral brazing forming, and the second laths (1121) of the second clamping plate (112) are also in brazing connection.

4. The plate fin heat exchanger of the brazed composite coil of claim 1, wherein: the coil pipe is S-shaped, the S-shaped coil pipe is formed by winding a pipe body in an S shape on a plane, the S-shaped coil pipe body is composed of a plurality of straight pipe sections and a plurality of elbow sections, the groove (11111) of the first clamping plate (111) is a straight groove formed corresponding to each straight pipe section of the S-shaped coil pipe, the groove (11211) of the second clamping plate (112) is a straight groove formed corresponding to each straight pipe section of the S-shaped coil pipe, and the elbow section of the S-shaped coil pipe is exposed out of the side edges of the first clamping plate (111) and the second clamping plate (112).

5. The plate fin heat exchanger of the brazed composite coil of claim 1 or 4, wherein: the coil pipe (113) is formed by coiling a single pipe body on a plane.

6. The plate fin heat exchanger of the brazed composite coil of claim 1 or 4, wherein: the coil pipe (113) is formed by coiling a plurality of pipe bodies leaning side by side on a plane.

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