CN114877718B - Heat exchanger, air conditioner and processing method of heat exchanger - Google Patents
Heat exchanger, air conditioner and processing method of heat exchanger Download PDFInfo
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- CN114877718B CN114877718B CN202210289002.1A CN202210289002A CN114877718B CN 114877718 B CN114877718 B CN 114877718B CN 202210289002 A CN202210289002 A CN 202210289002A CN 114877718 B CN114877718 B CN 114877718B
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- 238000003672 processing method Methods 0.000 title abstract description 10
- 238000007789 sealing Methods 0.000 claims description 64
- 238000000034 method Methods 0.000 claims description 23
- 238000003754 machining Methods 0.000 claims description 18
- 238000012545 processing Methods 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 5
- 230000007423 decrease Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims 1
- 238000003466 welding Methods 0.000 abstract description 81
- 239000012530 fluid Substances 0.000 abstract description 9
- 230000035882 stress Effects 0.000 description 17
- 239000010425 asbestos Substances 0.000 description 15
- 229910052895 riebeckite Inorganic materials 0.000 description 15
- 238000009434 installation Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000002893 slag Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 4
- 230000008719 thickening Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
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Classifications
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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
- F28D7/16—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 arranged in parallel spaced relation
- F28D7/1615—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 arranged in parallel spaced relation the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium
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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
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
- F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
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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
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
- F28F9/262—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators
- F28F9/268—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators by permanent joints, e.g. by welding
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The application relates to the technical field of heat exchangers and provides a heat exchanger, an air conditioner and a processing method of the heat exchanger, wherein the heat exchanger comprises the following components: the tube plate comprises a tube plate body and a mounting boss arranged on one side of the tube plate body; the shell body is provided with a plurality of grooves, the first end of the housing is sealingly connected to the mounting boss. The heat exchanger tube side fluid leakage problem caused by deformation of the heat exchanger tube plate due to welding of the heat exchanger in the prior art is effectively solved.
Description
Technical Field
The present application relates to heat exchange the technical field of the device is that, in particular to a heat exchanger, an air conditioner and a processing method of the heat exchanger.
Background
With the increasing level of technology and manufacturing technology, the manufacturing technology gradually advances, and more production problems can be solved. At present, a central air conditioner is the most widely used temperature control tool, a core component in the central air conditioner is a heat exchanger, and a shell-and-tube heat exchanger used in the central air conditioner consists of a tube side and a shell side, wherein the tube side is used for passing tube side fluid, and the shell side is used for cooling or heating.
As shown in fig. 1 to 4, in the prior art, the tube side consists of an end cover 1, a tube plate 2 and heat exchange tubes, wherein, the end cover 1 is provided with an end cover inlet 4, an end cover outlet 5, a shell inlet 6 and a shell outlet 7. The end cover 1 and the tube plate 2 are commonly sealed by the asbestos sealing gasket, and when the asbestos sealing gasket is used, the asbestos sealing gasket is required to be arranged between the end cover 1 and the tube plate 2, and the asbestos sealing gasket is extruded and deformed in an external force mode, so that the sealing purpose is achieved. If the contact surface of the tube plate is uneven, deformed and the like in the installation process of the asbestos sealing gasket, the asbestos sealing gasket is greatly extruded, and the asbestos is more deformed, so that the stress limit of the asbestos is broken, the sealing is invalid, and the quality and the service life of the heat exchanger are seriously affected. At present, the tube plate 2 and the shell 3 are connected in a welding mode, and a fillet welding mode is generally adopted, so that a welding pool is large, thermal stress is large after welding, and the tube plate 2 is slightly deformed. The deformation of the tube plate 2 can lead to the reliable sealing of the pipeline fluid by screwing the bolt when the asbestos sealing gasket is installed, and simultaneously, the deformation of the tube plate leads to the taper of the tube plate hole, further influences the expansion joint of the heat exchange tube and the tube plate, reduces the sealing reliability of the heat exchange tube and even influences the whole central air conditioner.
Disclosure of Invention
The application provides a heat exchanger, an air conditioner and a processing method of the heat exchanger, which are used for solving the problem that in the prior art, the tube sheet of the heat exchanger is deformed due to welding of the heat exchanger, so that the tube side fluid of the heat exchanger is leaked.
To solve the above problems, in a first aspect, the present application provides a heat exchanger, including: the tube plate comprises a tube plate body and a mounting boss arranged on one side of the tube plate body; the first end of casing links to each other with the installation boss is sealed.
Further, the installation boss includes first boss section and second boss section, and the first end and the tube sheet main part of first boss section link to each other, and the first end and the second end of first boss section link to each other, and the circumference outside diameter of first boss section is greater than the circumference outside diameter of second boss section to make first boss section and second boss section form the step, the first end of casing is located the circumference outside of second boss section.
Further, the thickness of the first land is greater than the thickness of the second land.
Further, the inner surface of the first land section is flush with the inner surface of the second land section.
Further, the height of the first land is equal to the sum of the height of the second land and the wall thickness of the housing.
Further, the tube plate and the shell are both made of metal, and the first end of the shell is connected with the mounting boss by welding.
Further, the second end of the first boss section is provided with a first welding groove, and the first welding groove gradually decreases from outside to inside.
Further, the first end of the shell is provided with a second welding groove, and the second welding groove is gradually reduced from outside to inside.
Further, the tube plate body and the mounting boss are of an integrally formed structure.
Further, the heat exchanger also comprises an end cover, and an end cover inlet and an end cover outlet are arranged on the end cover.
Further, the heat exchanger further comprises a sealing member, a sealing groove is formed in the side, facing away from the mounting boss, of the tube plate body, and the sealing member is arranged between the end cover and the tube plate body.
Further, the heat exchanger comprises a heat exchange tube, and the end part of the heat exchange tube is connected with the tube plate main body in a sealing way.
In a second aspect, the present application also provides an air conditioner, the air conditioner comprising a heat exchanger, the heat exchanger being a heat exchanger according to any one of claims 1 to 11.
In a third aspect, the present application further provides a method for processing a heat exchanger according to any one of claims 1 to 11, the method for processing a heat exchanger comprising the steps of:
s10, machining a mounting boss on one side of a tube plate;
s20, machining a tube side mounting hole of the tube sheet;
s30, the shell is in sealing connection with the mounting boss of the tube plate.
Further, when the mounting boss is machined in step S10, the first boss section and the second boss section are machined in a machining mode, the first boss section is located between the second boss section and the tube plate body, and the outer diameter of the second boss section is smaller than the outer diameter of the first boss section.
Further, blanking of the tube sheet is performed before step S10.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
the technical scheme of this application, the heat exchanger includes tube sheet and casing, and wherein, the tube sheet includes the tube sheet main part and sets up the installation boss in one side of tube sheet main part, and the installation boss links to each other with the first end seal of casing. The mounting boss is arranged on one side of the tube plate main body, and the mounting boss is used for changing the connection and sealing method between the tube plate and the shell through the structure of the mounting boss, so that the problem that in the prior art, the tube plate of the heat exchanger is deformed due to the welding of the heat exchanger, and therefore the tube side fluid of the heat exchanger is leaked can be effectively solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 shows a schematic perspective view of a prior art heat exchanger;
FIG. 2 shows the heat exchange of FIG. 1 a schematic front view of the device;
FIG. 3 shows a schematic view of a portion of a cross-section of the heat exchanger of FIG. 1;
FIG. 4 shows an enlarged partial cross-sectional schematic view of the heat exchanger of FIG. 3 at C;
FIG. 5 shows a schematic perspective view of a heat exchanger according to an embodiment of the present application;
FIG. 6 shows a schematic front view of the heat exchanger of FIG. 5;
FIG. 7 shows a schematic top view of the heat exchanger of FIG. 5;
FIG. 8 shows a schematic left view of the heat exchanger of FIG. 5;
FIG. 9 shows a schematic partial cross-sectional view of the heat exchanger of FIG. 5;
FIG. 10 shows an enlarged partial cross-sectional schematic view of the heat exchanger of FIG. 9 at B;
FIG. 11 shows a schematic perspective view of a tubesheet according to an embodiment of the present application;
FIG. 12 shows the view of FIG. 11 a schematic front view of the tube sheet;
FIG. 13 shows a schematic rear view of the tubesheet of FIG. 11;
FIG. 14 shows a schematic top view of the tube sheet of FIG. 11;
FIG. 15 shows a schematic left-hand view of the tubesheet of FIG. 11;
fig. 16 shows a schematic cross-sectional view of the tubesheet of fig. 15.
Wherein the above figures include the following reference numerals:
1. an end cap; 2. a tube sheet; 3. a housing; 4. an end cap inlet; 5. an end cap outlet; 6. a housing inlet; 7. a housing outlet; 10. a tube sheet; 11. a mounting boss; 111. a first land section; 112. a second land section; 12. a tube sheet body; 13. sealing the groove; 14. a tube plate inner through hole; 15. a tube plate outer through hole; 20. a housing; 21. a housing inlet; 22. a housing outlet; 30. an end cap; 31. an end cap inlet; 32. an end cap outlet; 311. a first end cap inlet; 312. a second end cap inlet; 321. a first end cap outlet; 322. a second end cap outlet; 40. a seal; 51. a first mount; 52. second one a mounting base; 60. replacement of a heat pipe; 70. baffle flow a plate.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.
As shown in fig. 5 to 16, the present application provides a heat exchanger including: tube sheet 10 and shell 20. Wherein the tube sheet 10 includes a tube sheet body 12 and a mounting boss 11 provided at one side of the tube sheet body 12. The first end of the housing 20 is sealingly connected to the mounting boss 11.
In the technical solution of this embodiment, the heat exchanger includes a tube plate 10 and a shell 20, where the tube plate 10 includes a tube plate body 12 and a mounting boss 11 disposed on one side of the tube plate body 12, and the mounting boss 11 is connected to a first end of the shell 20 in a sealing manner. The tube sheet 10 is used for connecting an end cover and sealing a heat exchange tube 60 in the heat exchanger, the heat exchange tube 60 is arranged inside the shell 20, and tube side fluid mainly flows in the heat exchange tube 60, in this embodiment, a refrigerant is adopted as the tube side fluid, and shell side fluid or other heat exchange media mainly flows in the shell 20. A mounting boss 11 is provided on one side of the tube sheet body 12, which functions to change the method of connection and sealing between the tube sheet 10 and the shell 20 by its own structure, the problem of leakage of the refrigerant of the heat exchanger caused by deformation of the tube plate 10 due to the welding method in the prior art can be effectively solved. Specifically, the connection of the first end of the shell 20 to the mounting boss 11 avoids deformation caused by direct connection of the shell 20 to the tubesheet body 12. The shell 20 is provided with a first mounting seat 51 and a second mounting seat 52, and the shell 20 is connected with the outside through the first mounting seat 51 and the second mounting seat 52 in a manner of welding, fastening, riveting and the like.
As shown in fig. 9, 10, 14, 15 and 16, in the technical solution of the present embodiment, the mounting boss 11 includes a first boss section 111 and a second boss section 112, a first end of the first boss section 111 is connected to the tube sheet main body 12, a first end of the second boss section 112 is connected to a second end of the first boss section 111, and a circumferential outside diameter of the first boss section 111 is larger than a circumferential outside diameter of the second boss section 112, so that the first boss section 111 and the second boss section 112 form a step, and a first end of the housing 20 is located on the circumferential outside of the second boss section 112. The mounting boss 11 is provided with a first boss section 111 and a second boss section 112 to form a step, i.e., the first boss section 111 is higher than the second boss section 112. The outer wall of the first boss section 111 limits the wall surface of the shell 20, and when the tube plate 10 and the shell 20 are connected, the relative position of the first boss section and the shell 20 can be in a to-be-connected state, so that subsequent connection work is facilitated. Taking the welding of the tube plate 10 and the shell 20 as an example, the end surface of the first end of the shell 20 is adjacent to the step surface formed between the first boss section 111 and the second boss section 112, and the shell 20 and the tube plate 10 can be welded by adopting a butt welding mode. The second land 112 is located inside the first end of the housing 20 to prevent the weld slag from splashing into the heat exchanger. That is, the above structure ensures that the welding between the tube plate 10 and the shell 20 is butt welding, and prevents slag generated in the welding process from entering the interior of the shell 20.
As shown in fig. 14 to 16, in the technical solution of the present embodiment, the thickness of the first land 111 is greater than the thickness of the second land 112. In practical application, the surface to be connected between the first boss 111 and the housing 20 is a surface perpendicular to the axis, and the curved surface parallel to the axis is close to the outer surface of the housing 20 for easy connection. The second boss section is located in the shell after being connected, so that the thickness required by the second boss section, namely the outer diameter of the second boss section, is smaller than that of the first boss section. The above structure can avoid the step formed by the inner wall of the second boss section 112 leaning against the axis of the heat exchanger, thereby avoiding the problem that the inside of the heat exchanger is not smooth or scratched during installation.
As shown in fig. 14 to 16, in the technical solution of the present embodiment, the inner surface of the first land 111 is flush with the inner surface of the second land 112. The inner diameter of the first boss section is the same as the inner diameter of the second boss section, and the inner surface of the first boss section and the inner surface of the second boss section in the actual production process belong to the unified procedure for processing, so that the processing difficulty is reduced, the processing efficiency is improved, and the machining cost is further reduced. Specifically, the entire tube sheet 10 is integrally formed, and then post-processing, such as turning, grinding, etc., is performed. The height of the first land 111 is equal to the sum of the height of the second land 112 and the wall thickness of the housing 20. The first and second boss sections 111 and 112 and the casing 20 of the heat exchanger are smooth and excessive, and the problems of steps and bosses are avoided. In the technical solution of this embodiment, the height of the second land section 112 is not less than 8mm, and the width is 8mm. Therefore, during butt welding, welding slag can be effectively blocked from splashing, and the welding slag is prevented from splashing to the internal heat exchange tube, so that burn, leakage or pollution of the heat exchange tube is caused, and the reliability and energy efficiency of the heat exchanger are affected. The height of the first land 111 is equal to the sum of the height of the second land 112 and the wall thickness of the housing 20, and the width of the first land 111 is not less than 20mm. The beneficial effect of above-mentioned structure: after the installation boss 11 of the tube plate 10 is in butt welding with the shell 20, the problems of expansion joint of the heat exchanger and refrigerant leakage of the sealing surface of the tube plate 10 caused by deformation of the tube plate 10 of the heat exchanger due to welding can be effectively solved. Meanwhile, the machining efficiency can be improved, the simple thickening tube plate is changed, and the cost caused by a large number of holes and lengthened bolts is increased.
In the technical solution of this embodiment (not shown in the drawings), the tube plate 10 and the housing 20 are both made of metal, and the first end of the housing 20 is connected to the mounting boss 11 by welding. The connection between the housing and the mounting boss may be welded, wherein a variety of welding modes may be employed, including but not limited to arc welding, high frequency induction welding, etc., wherein arc welding is an additive welding, high frequency induction welding is a self-material fusion, and different welding modes may be selected according to actual requirements. The purpose of welding is to connect the tube plate and the shell into a whole, and form a sealed space in the tube plate and the shell, so that the sealing property and the stability of the joint can be ensured to the greatest extent by using welding. The shell 20 is provided with the shell inlet 21 and the shell outlet 22, the shell outlet 22 is positioned at the second end of the shell 20, and the shell inlet 21 is positioned at the first end of the shell 20, so that the heat exchange effect is good.
It should be noted that, the connection method of the present application is not limited to welding, and mechanical connection, adhesive connection and other connection modes can be adopted, and the connection standard of the heat exchanger is as follows: the heat exchanger ensures the normal operation of the heat exchanger in a high-temperature or low-temperature environment, and the joint between the shell and the tube plate cannot leak.
As shown in fig. 10 to 16, in the technical solution of the present embodiment, the second end of the first land 111 has a first welding groove, and the first welding groove gradually decreases from outside to inside. The provision of the first welding groove can effectively ensure that the welding quality between the first land 111 and the housing 20 is better, it is easier to fill the weld.
As shown in fig. 10 to 16, in the technical solution of the present embodiment, the first end of the housing 20 has a second welding groove, and the second welding groove gradually decreases from outside to inside. The first welding groove and the second welding groove are combined to form a butt welding seam, and during welding, one part of the first welding groove and the second welding groove is melted and mixed with the welding flux under the action of heat, and the butt welding seam is filled by cooling and resolidification to finish welding. The tube sheet 10 is now integrally connected to the shell 20 to form a complete seal with the space within the shell. The butt welding has the advantages that the tube plate 10 is positioned at a fixed position in the welding process, the heating welding position is the first boss section 111, so that welding stress can be formed between the mounting boss 11 and the shell 20, the influence of the welding stress between the mounting boss 11 and the shell 20 on the tube plate main body 12 is small, the sealing between the tube plate 10 and the heat exchange tube 60 and the sealing between the tube plate 10 and the end cover 30 meet the requirements, and the welding reliability is strong.
The slit formed by combining the first welding groove and the second welding groove is not only suitable for butt welding connection, but also can be solidified into a metal ring in the slit through molten metal, and the connecting tube plate and the shell can be sealed, or can be connected through molten nonmetallic materials, or can be connected with the shell through a part of adhesive with lower influence of ambient temperature.
As shown in fig. 11 to 16, in the technical solution of this embodiment, the tube plate body 12 and the mounting boss 11 are integrally formed. The tube plate body 12 and the mounting boss 11 are integrally formed, so that the processing flow can be simplified in the manufacturing process. The tube plate 10 belongs to a flange workpiece, and is usually processed by adopting a material reduction process, namely, the industrial mother machine is used for processing, if the tube plate main body 12 and the installation boss 11 are in split type design in the processing process, the matching relation between the tube plate main body 12 and the installation boss 11 needs to be designed and calculated, the processing precision of the tube plate main body needs to be calculated according to the matching tolerance of the tube plate main body and the installation boss, the integrated design is higher in precision, the error is relatively smaller, meanwhile, the processing procedure is reduced, and the efficiency is increased.
As shown in fig. 5 to 9, in the technical solution of this embodiment, the heat exchanger further includes an end cover 30, and an end cover inlet 31 and an end cover outlet 32 are disposed on the end cover 30. In the technical scheme of the embodiment, the end cover 30 and the tube plate 10 are connected by bolts, and the end cover 30 is provided with the end cover inlet 31 and the end cover outlet 32, so that the number of the inlets and the outlets arranged on the shell 20 or the tube plate 10 is avoided, and the sealing effect is further ensured. The end cover is provided with a first end cover inlet 311, a second end cover inlet 312, a first end cover outlet 321 and a second end cover outlet 322, wherein the first end cover inlet 311 and the first end cover outlet 321 correspond to the same group of heat exchange tube bundles, and the second end cover inlet 312 and the second end cover outlet 322 correspond to the same group of heat exchange tube bundles.
As shown in fig. 5 to 9, in the technical solution of the present embodiment, the heat exchanger further includes a sealing member 40, and a sealing groove 13 is disposed on a side of the tube plate body 12 facing away from the mounting boss 11, and the sealing member 40 is disposed between the end cover 30 and the tube plate body 12. The sealing groove is used for installing the sealing element, is in a closed ring shape and is positioned on the inner side of the tube plate body, the sealing groove 13 can be used for effectively positioning the sealing element, and the sealing element is not easy to have dislocation and other problems. The sealing piece is embedded into the sealing groove to form sealing through the extrusion periphery of the end cover. The tube plate main body 12 is also provided with a plurality of tube plate outer through holes, the end cover 30 is provided with a plurality of through holes corresponding to the tube plate outer through holes, the through holes and the tube plate outer through holes form a mounting cavity of bolts, bolts are arranged in the mounting cavity, nuts are arranged on one side, close to the boss, of the tube plate outer through holes, of the mounting cavity, the tube plate 10 and the end cover 30 are fixed by tightening the bolts, the end cover 30 and the tube plate 10 squeeze sealing elements in the tightening process, the corresponding positions of the sealing elements are embedded into the sealing grooves, and sealing is completed.
The sealing element of this embodiment is the asbestos sealing gasket, if the tube sheet has the condition such as contact surface unevenness or warp, can appear sealed effectual problem, and the asbestos sealing gasket has the stress limit of crushing, only through improving the effort between tube sheet and the end cover, can lead to the sealed destruction of asbestos sealing gasket. In the prior art, the welding is performed in a fillet welding mode, one side of the tube plate, which faces the end cover, is deformed, the maximum deformation is 2-3 mm, after the asbestos sealing gasket is installed, reliable sealing of a refrigerant cannot be realized under the sealing torque of a bolt, and the problems that after assembly of a production line or long-term use after sale, deformation stress of the tube plate is released and cold coal leakage frequently occur are solved. The structure can lead to taper of tube plate holes of the tube plate, the maximum aperture difference is 0.01-0.02 mm, namely, the hole of the tube plate on the side of the A face is large, the hole of the tube plate is gradually reduced along the thickness direction of the tube plate, and after the heat exchange tube is expanded, the contact stress with the tube plate Kong Canyu is insufficient, and expansion joint sealing leakage occurs.
As shown in fig. 5 to 9, in the technical solution of the present embodiment, the heat exchanger includes a heat exchange tube 60, and an end portion of the heat exchange tube 60 is connected with the tube plate main body 12 in a sealing manner. The heat exchange tube 60 is connected with the tube plate main body 12 in an expansion joint manner, the tube plate main body 12 is provided with a tube plate through hole, and the end part of the heat exchange tube is positioned in the tube plate through hole for expansion joint, so that the sealing between the heat exchange tube 60 and the tube plate main body 12 can be further ensured, and the deformation of the tube plate main body 12 can be greatly reduced.
The end cap inlet 31 includes a first end cap inlet 311 and a second end cap inlet 312, and the end cap outlet 32 includes a first end cap outlet 321 and a second end cap outlet 322. The first end cap inlet 311 is communicated with the first end cap outlet 321, specifically, the heat exchange tube has a U-shaped structure, two ends of the heat exchange tube are respectively connected with the first end cap inlet 311 and the first end cap outlet 321, and an isolation boss and a sealing piece are arranged between the end cap 30 and the tube plate main body 12 for sealing. Similarly, the second end cap inlet 312 and the second end cap outlet 322 are also the first end cap inlet 311 and the first end cap outlet 321, so that the problem that liquid inlet and liquid outlet between the end cap 30 and the tube plate 10 cannot be mixed can be avoided. The shell 20 is provided with a shell inlet 21 and a shell outlet 22, the shell inlet 21 is arranged at a first end of the shell 20, the shell outlet 22 is arranged at a second end of the shell 20, and according to practical situations, the shell inlet 21 can be used as an outlet when in use, and the shell outlet 22 can be used as an inlet.
As shown in fig. 5 to 9, in the technical solution of the present embodiment, the heat exchanger further includes a baffle plate 70, and the baffle plate 70 is located inside the housing. The provision of baffles 70 ensures that the liquid flow inside the heat exchanger is as desired, the heat exchange efficiency is guaranteed to the greatest extent. For example, the first deflector is approximately sealed to the first side of the housing 20, the first deflector is spaced from the second side of the housing 20 (the first and second sides are disposed opposite), the second deflector is spaced from the first side of the housing 20, the second deflector is approximately sealed to the second side of the housing 20, the third deflector is approximately sealed to the first side of the housing 20, the third deflector has a gap to the second side of the housing 20, and so on, the above structure prolongs the flow path of the shell side fluid, which is regular.
As can be seen from the foregoing, the technical solution of the present embodiment overcomes the adverse effects caused by the fillet weld connection between the shell 20 and the tube sheet 10 in the prior art: in the prior art, an angle welding mode is adopted between the shell and the tube plate, the structure of the joint of the shell 20 and the tube plate 10 is suddenly changed, stress concentration is more easily generated, interface tissue instability, welding deformation and the like are caused, gaps are longer and larger, gaps are not easy to fill up, larger welding power is required, and the welding stress stored after welding is larger, so that the problem of deformation is more easily caused.
The technical scheme of the embodiment also solves the problem that the welding mode in the prior art causes the tube plate to release the stress and deform during welding storage, and causes the sealing surface for the tube side to deform. After the asbestos sealing gasket is installed due to the deformation of the tube plate towards the end face of the end cover, effective sealing cannot be realized under the moment of the bolt, or the stress is relaxed and leakage occurs under long-term use. The tube plate deformation leads to the tube plate hole to appear the tapering, leads to the heat exchange tube expansion joint to attenuate unevenly, reduces the residual contact stress between heat exchange tube and the tube plate hole, causes the heat exchange tube expansion joint seal reliability to descend, appears leaking. The problem of deformation of the tube plate in the prior art can be solved only by simply thickening the tube plate, and the thickened structure can cause the increase of the length of the bolt, so that the cost is wasted; meanwhile, the length of the machine extension of the heat exchange tube mounting hole is prolonged, and the machine cost is increased and wasted.
It should be noted that, in this embodiment, when selecting the tube plate base material to be processed, a thicker tube plate base material needs to be selected, and the tube plate body after the installation boss is processed is equal to the tube plate thickness in the prior art, so that the requirements can be met. And a mounting boss is machined, so that a welding mode of butt welding with the shell is realized. The fillet welding is changed into butt welding, so that the welding power and welding stress deformation are greatly reduced, and the sealing reliability of the shell side can be ensured. Meanwhile, the welding stress energy storage is reduced, and the problem of tube plate deformation caused by long-time working stress release of the shell tube can be effectively solved.
The technical scheme of the embodiment can solve the problem of deformation of the tube plate towards one side of the end cover 30, and can ensure that the asbestos sealing gasket is effectively sealed under the moment of the bolt after being installed. The technical scheme of the embodiment can ensure that the welding stress is released little, the tube plate is not deformed and leakage does not occur under long-term use.
The technical scheme of the embodiment also solves the problem that the tube plate hole has conicity due to deformation of the tube plate, ensures that enough residual contact stress is generated between the heat exchange tube and the inner surface of the tube plate hole after expansion joint, and realizes effective sealing.
Meanwhile, the pipe side of the pipe plate is subjected to machining and material removal (rough machining), and the machining efficiency is high. Drilling (heat exchange tube mounting holes) is carried out after the material is removed. The simple thickening tube plate is changed, a large number of holes are drilled, and the machining cost is greatly improved. The simple thickening tube plate can be changed, the flange holes at the edge parts are deepened, the sealing bolts are lengthened, and the cost is wasted.
Meanwhile, a step is reserved through machining, and welding spatter is blocked during butt welding. The welding position is effectively protected, slag generated by welding is prevented from splashing to the heat exchange tube inside, burn, leakage or pollution of the heat exchange tube and the baffle plate 70 are caused, and the reliability and the energy efficiency of the heat exchanger are affected.
The application also provides a processing method (not shown in the figure) of the heat exchanger, wherein the heat exchanger is the heat exchanger, and the processing method of the heat exchanger comprises the following steps: s10, machining a mounting boss on one side of a tube plate; s20, machining a tube side mounting hole of the tube sheet; s30 mounting of shell and tube plate the boss is connected in a sealing way. The processing method of the heat exchanger can effectively ensure that the deformation of the heat exchanger is small in the processing process, and the sealing effect of welding stress on the heat exchanger is small.
In the solution of the present embodiment (not shown in the drawings), in the machining method of the heat exchanger, when the installation boss 11 is machined in step S10, the first boss section 111 and the second boss section 112 are machined in a machining manner, the first boss section 111 is located between the second boss section 112 and the tube plate body 12, and the outer diameter of the second boss section 112 is smaller than the outer diameter of the first boss section 111. The above processing method can effectively ensure the processing precision of the first boss section 111 and the second boss section 112.
In the technical solution of the present embodiment (not shown in the figure), the processing method performs blanking of the tube sheet before step S10. The processing mode has higher precision and can effectively save the cost.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (15)
1. A heat exchanger, comprising:
a tube plate (10), wherein the tube plate (10) comprises a tube plate main body (12) and a mounting boss (11) arranged on one side of the tube plate main body (12);
a housing (20), a first end of the housing (20) being sealingly connected to the mounting boss (11);
the mounting boss (11) comprises a first boss section (111) and a second boss section (112), wherein a first end of the first boss section (111) is connected with the tube plate main body (12), a first end of the second boss section (112) is connected with a second end of the first boss section (111), and a circumferential outside diameter of the first boss section (111) is larger than a circumferential outside diameter of the second boss section (112) so that the first boss section (111)
And the second boss section (112) are stepped, and the first end of the housing (20) is located circumferentially outward of the second boss section (112).
2. The heat exchanger according to claim 1, wherein the thickness of the first land section (111) is greater than the thickness of the second land section (112).
3. The heat exchanger according to claim 2, wherein the inner surface of the first land section (111) is flush with the inner surface of the second land section (112).
4. A heat exchanger according to claim 3, wherein the height of the first land section (111) is equal to the sum of the height of the second land section (112) and the wall thickness of the housing (20).
5. The heat exchanger according to claim 1, wherein the tube sheet (10) and the housing (20) are both made of metal, and the first end of the housing (20) is welded to the mounting boss (11).
6. The heat exchanger according to claim 5, wherein the second end of the first land section (111) has a first weld groove which tapers from outside to inside.
7. The heat exchanger according to claim 5, wherein the first end of the housing (20) has a second weld groove, which decreases gradually from the outside to the inside.
8. The heat exchanger according to any one of claims 1 to 7, wherein the tube sheet body (12) and the mounting boss (11) are of an integrally formed construction.
9. The heat exchanger according to any one of claims 1 to 7, further comprising an end cap (30), the end cap (30) being provided with an end cap inlet (31) and an end cap outlet (32).
10. The heat exchanger according to claim 9, further comprising a seal (40), wherein a side of the tube sheet body (12) facing away from the mounting boss (11) is provided with a sealing groove (13), the seal (40) being arranged between the end cap (30) and the tube sheet body (12).
11. The heat exchanger according to claim 9, characterized in that the heat exchanger comprises heat exchange tubes (60), the ends of the heat exchange tubes (60) being sealingly connected to the tube sheet body (12).
12. An air conditioner, characterized in that the air conditioner comprises a heat exchanger as claimed in any one of claims 1 to 11.
13. A method of processing a heat exchanger according to any one of claims 1 to 11, comprising the steps of:
s10, machining a mounting boss on one side of a tube plate;
s20, machining a tube side mounting hole of the tube sheet;
s30, the shell is in sealing connection with the mounting boss of the tube plate.
14. The method of machining a heat exchanger according to claim 13, wherein the first and second boss sections (111, 112) are machined in the machining of the mounting boss (11) in step S10, the first boss section (111) being located between the second boss section (112) and the tube sheet body (12), the second boss section (112) having an outer diameter smaller than an outer diameter of the first boss section (111).
15. The method of claim 13, wherein the tube sheet is blanked prior to step S10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210289002.1A CN114877718B (en) | 2022-03-22 | 2022-03-22 | Heat exchanger, air conditioner and processing method of heat exchanger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210289002.1A CN114877718B (en) | 2022-03-22 | 2022-03-22 | Heat exchanger, air conditioner and processing method of heat exchanger |
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| Publication Number | Publication Date |
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| CN114877718A CN114877718A (en) | 2022-08-09 |
| CN114877718B true CN114877718B (en) | 2023-05-12 |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4426415B2 (en) * | 2004-10-01 | 2010-03-03 | 東洋エンジニアリング株式会社 | Reactor |
| CN203375767U (en) * | 2013-05-31 | 2014-01-01 | 广东美的暖通设备有限公司 | Shell and tube assembly and air conditioner with same |
| CN208223250U (en) * | 2018-05-07 | 2018-12-11 | 石家庄德丰压力容器制造有限公司 | A kind of novel fixed tube-sheet exchanger |
| CN210664062U (en) * | 2019-10-12 | 2020-06-02 | 南通万马液压机械有限公司 | Novel floating head type cooler |
| CN111811313A (en) * | 2020-08-11 | 2020-10-23 | 山东豪迈机械制造有限公司 | Tube plate assembly and heat exchanger with same |
| CN213983518U (en) * | 2020-11-17 | 2021-08-17 | 东方电气集团东方锅炉股份有限公司 | Flexible tube plate of waste heat boiler |
| CN214701864U (en) * | 2021-01-26 | 2021-11-12 | 无锡宝亿能源设备有限公司 | Fin heat exchanger |
| CN216011917U (en) * | 2021-10-17 | 2022-03-11 | 刘剑磊 | Large tube plate for petrochemical equipment |
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