CN113996964B - Tube plate welding method, tube body and tube plate connecting method and heat exchanger - Google Patents
Tube plate welding method, tube body and tube plate connecting method and heat exchanger Download PDFInfo
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- CN113996964B CN113996964B CN202111637596.2A CN202111637596A CN113996964B CN 113996964 B CN113996964 B CN 113996964B CN 202111637596 A CN202111637596 A CN 202111637596A CN 113996964 B CN113996964 B CN 113996964B
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- tube
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- plate body
- hollow cylinder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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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
Abstract
The invention relates to the technical field of metal structure processing, in particular to a tube plate welding method, which comprises the following steps: fixing the plate body; sleeving a sealing flat gasket on the periphery of the hollow cylinder section, and inserting the hollow cylinder section into the through hole from one end of the plate body; the convex edge is pressed by a die to be protruded towards the plate body, and an annular recess is formed on the surface of the plate body by pressing the plate body; the sealing flat gasket is clamped between the annular concave part and the convex part of the convex edge; and keeping a pressing state, welding the other side of the hollow cylinder section, and fixedly connecting the intermediate body and the plate body. The invention provides a tube plate processing method which can ensure the stability and the sealing performance of the relative position of a tube plate and a tube body after connection and can properly reduce the requirement on welding quality. The invention also discloses a method for connecting the tube body and the tube plate and a heat exchanger.
Description
Technical Field
The invention relates to the technical field of metal structure processing, in particular to a tube plate welding method, a tube body and tube plate connecting method and a heat exchanger.
Background
The existing tube plate is a plate body which is used for fixing a tube body and sealing media in a heat exchanger and is formed by drilling a through hole slightly larger than the outer diameter of the tube on a circular steel plate, and the tube body penetrates into the heat exchanger and is welded and fixed when the heat exchanger is used.
The welding device comprises a tube body, a tube plate, a heat exchanger, a welding position connecting piece and a welding position connecting piece, wherein the tube body is axially and radially fixed, and the sealing of media in the heat exchanger is guaranteed through the welding position of the tube plate and the tube body.
Disclosure of Invention
The invention provides a tube plate welding method, which can effectively solve the problems in the background technology; meanwhile, the invention also discloses a method for connecting the tube body and the tube plate and a heat exchanger, which have the same technical effects.
In order to achieve the purpose, the invention adopts the technical scheme that:
a tube plate welding method is used for welding a tube plate consisting of a plate body, a sealing flat gasket and an intermediate body; the plate body comprises a plurality of through holes; the intermediate body comprises a hollow cylinder section and a convex edge, the outer wall of the hollow cylinder section is attached to the inner wall of the through hole, and the convex edge is led out from the end part of one side of the hollow cylinder section along the radial direction; the sealing flat gasket is flat and is clamped between the plate body and the convex edge;
the tube plate welding method comprises the following steps:
fixing the plate body;
sleeving the sealing flat gasket on the periphery of the hollow cylinder section, and inserting the hollow cylinder section into the through hole from one end of the plate body until the convex edge presses the sealing flat gasket on the surface of one side of the plate body;
pressing the convex edge through a mold, wherein the pressing position of the mold is an annular bulge, the axis of the annular bulge is coincident with the axis of the hollow cylindrical section, the convex edge is protruded towards the plate body through pressing, and an annular recess is formed on the surface of the plate body through pressing the plate body;
the sealing flat gasket is clamped between the annular concave part and the convex part of the convex edge;
and keeping the pressing state, welding the other side of the hollow cylinder section, and fixedly connecting the intermediate body and the plate body through welding.
Further, the fixing of the plate body at least includes supporting on the other side surface of the plate body, and the supporting position corresponds to the pressing position of the die.
Further, the hollow cylinder section is in interference fit with the through hole.
Further, the annular projection is inclined toward the axis in the pressing direction.
Further, the hollow cylinder section is provided with a chamfer structure relative to the inner side edge of the other side of the convex edge setting end.
Further, the hollow cylinder section is inserted in position with respect to the through hole, beyond the plate surface.
Further, the height of the hollow cylinder section exceeding the surface of the plate body is less than or equal to 3 mm.
A tube body and tube plate connecting method adopts the tube plate welding method, and the periphery of the adopted tube body is provided with at least one annular groove, and an O-shaped sealing ring is arranged in the annular groove;
the method for connecting the tube body and the tube plate comprises the following steps:
before the hollow cylinder section and the plate body are welded and fixed in the tube plate welding method, inserting a tube body from the other side of the hollow cylinder section, which is opposite to the convex edge setting end, until the end of the tube body reaches or exceeds the end of the hollow cylinder section, and ensuring that the O-shaped sealing ring is attached to the inner wall of the hollow cylinder section to realize sealing;
and executing a welding action, and realizing the welding fixed connection of the pipe body, the intermediate body and the plate body while fixedly connecting the intermediate body and the plate body by welding.
Further, before the hollow cylinder section and the plate body are welded and fixed, specifically, after the intermediate body is mounted with respect to the through hole, and before the mold presses the convex edge.
A heat exchanger adopts the method for connecting the tube body and the tube plate to realize the fixed connection of the tube body and the tube plate.
Through the technical scheme of the invention, the following technical effects can be realized:
the invention provides a tube plate processing method which can ensure the stability and the sealing performance of the relative position of a tube plate and a tube body after connection and can properly reduce the requirement on welding quality.
When the mould is exerted pressure, because the material around the perforating hole receives inside extrusion, consequently must make the material take place appropriate deformation, this kind of deformation is because the inner wall that is apart from the perforating hole is nearer, consequently must make the perforating hole inner wall produce slight inward bulge's trend, this kind of trend also can act on hollow cylinder section, make hollow cylinder section also take place slight inward bulge's trend equally, this kind of trend is all very favorable to installing the fixed and the sealed between the two of follow-up hollow cylinder section internal pipe body of inserting, can further reduce the requirement to the welding, the efficiency of welding has been improved by a wide margin, operating personnel's working strength has been reduced.
The tube plate obtained in the invention can also realize axial buffering, when the sealing flat gasket is extruded, only one side of the whole intermediate body is welded and fixed, and the other side is free, so when the product vibrates and the like, the hard damage probability of the welding position between the hollow cylinder section and the plate body can be reduced through the buffering of the sealing flat gasket between the plate body and the convex edge, the stability of the connecting part is further improved, and the service life of the product is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is an exploded view of a portion of a plate, a sealing pad and an intermediate body;
FIG. 2 is a cross-sectional view (including a partial enlargement) of the intermediate body and the seal pad at a mounting location;
FIG. 3 is a flow chart of a tube sheet welding method;
FIG. 4 is a schematic view of the flange deformed by the die;
FIG. 5 is a schematic view of a die pressing a ledge;
FIG. 6 is a schematic structural view of the mold (including an enlargement in partial section);
FIG. 7 is an exploded view of the intermediate body and the tubular body;
FIG. 8 is a cross-sectional view (including a partial enlargement) of the tube body and tube sheet after welding;
FIG. 9 is a flow chart of a method of connecting a tube body to a tube sheet;
FIG. 10 is a flow chart of another optimization of the tube body to tube sheet joining method;
reference numerals: 1. a plate body; 2. sealing the flat gasket; 3. an intermediate; 31. a hollow cylinder section; 32. a convex edge; 4. a mold; 41. an annular projection; 5. a pipe body; 51. an annular groove; 6. a deformation region; 7. and (4) welding positions.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The first embodiment is as follows:
as shown in fig. 1 and 2, a tube sheet welding method for welding a tube sheet composed of a plate body 1, a sealing flat gasket 2 and an intermediate body 3; the plate body 1 comprises a plurality of through holes; the intermediate body 3 comprises a hollow cylinder section 31 and a convex edge 32, the outer wall of the hollow cylinder section 31 is attached to the inner wall of the through hole, and the convex edge 32 is led out from the end part of one side of the hollow cylinder section 31 along the radial direction; the sealing flat gasket 2 is flat and is clamped between the plate body 1 and the convex edge 32;
as shown in fig. 3, the tube sheet welding method includes the steps of:
s1: a fixed plate body 1;
s2: sleeving the sealing flat gasket 2 on the periphery of the hollow cylinder section 31, and inserting the hollow cylinder section 31 into the through hole from one end of the plate body 1 until the convex edge 32 presses the sealing flat gasket 2 on the surface of one side of the plate body 1;
s3: the convex edge 32 is pressed by a mould 4, the pressing position of the mould 4 is an annular bulge 41, the axis of the annular bulge 41 is coincident with the axis of the hollow cylinder section 31, the extrusion causes the convex edge 32 to be convex towards the plate body 1, and an annular recess is formed on the surface of the plate body 1 by the extrusion of the plate body 1;
s4: the sealing flat gasket 2 is clamped between the annular recess and the convex part of the convex edge 32;
s5: the pressing state is maintained, and welding is performed on the other side of the hollow cylindrical section 31, and the intermediate body 3 and the plate body 1 are fixedly connected by welding.
The invention provides a tube plate processing method which can ensure the stability and the sealing performance of the relative position of a tube plate and a tube body 5 after connection and can properly reduce the requirement of welding quality, the finally obtained tube plate is used by an intermediate body 3 to achieve the aim of solving the sealing problem to a certain extent, and the effect of welding between the subsequent tube plate and the tube body 5 is only limited to realize the fixation of the tube body 5 relative to the tube plate, thereby effectively reducing the requirement of welding.
In particular, in practice, the seal between the plate body 1 and the intermediate body 3 is obtained by the deformation of the beads 32 and the compression of such deformation against the flat sealing gasket 2, as shown in fig. 4, where the seal is obtained with good results due to the curvature of the convex portion of the annular recess and bead 32, so that there is no possibility of gas leakage between the intermediate body 3 and the plate body 1; in addition, more importantly, when the mold 4 is pressed, since the material around the through hole is pressed inward, the material is inevitably subjected to appropriate deformation, and this deformation is closer to the inner wall of the through hole, and therefore the inner wall of the through hole inevitably tends to slightly bulge inward in the deformation region 6 as shown in fig. 5, and this tendency also acts on the hollow cylinder section 31, so that the hollow cylinder section 31 also tends to slightly bulge inward, which is very advantageous for fixing the pipe body 5 inserted into the hollow cylinder section 31 subsequently and sealing between the pipe body and the hollow cylinder section, and can further reduce the requirement for welding, and even can meet the required fixing requirement by means of spot welding, thereby greatly improving the welding efficiency and reducing the working strength of operators.
The tube sheet obtained in the present invention has another advantage: axial buffering; when the sealing flat gasket 2 is extruded, only one side of the whole intermediate body 3 is welded and fixed, and the other side is free, so that when the product vibrates and the like, the hard damage probability of the welding position 7 between the hollow cylinder section 31 and the plate body 1 can be reduced through the buffer of the sealing flat gasket 2 between the plate body 1 and the convex edge 32, the stability of the connecting part is further improved, and the service life of the product is prolonged.
The steps S1 and S2 can be changed from the existing order, and the above-mentioned order relationship in this embodiment is only a more conventional production mode.
In order to ensure the shape stability of the plate body 1 during the pressing process of the mold 4, as a preferred mode of the above embodiment, the fixing of the plate body 1 at least includes supporting on the other side surface of the plate body 1, and the supporting position corresponds to the pressing position of the mold 4, so that a pressing force resisting against the mold 4 can be formed on the other side of the plate body 1, and it is ensured that the plate body 1 is only locally deformed and does not bend integrally or the like, and this way can further improve the deformation certainty in the deformation region 6 in the above embodiment, thereby ensuring the realization of the predetermined technical effect.
In the implementation process, the best implementation mode of the support position is a complete ring shape, when the installation of the pipe body 5 causes difficulty, a plurality of support points which are uniformly distributed along the circumference around the axis of the through hole can also be adopted, and of course, the support points can also be enclosed into a closed ring shape through each support point. Holistic support and extrusion action all can be realized through automatic control, and the accurate location of support and extrusion position can be accurate through the assurance of system program, and the rhythm of action also can set up according to actual demand.
In order to guarantee the welding effect, hollow cylinder section 31 and perforating hole interference fit can promote the stability of leakproofness and structure, and at the in-process of processing, also can realize the control of position more easily in the installation of midbody 3 installation to the stability of position when guaranteeing the pressurized promotes the precision of processing. In this way, it is preferable that after the hollow cylindrical section 31 is inserted into the through hole, the flat sealing gasket 2 is pre-deformed to a certain extent by the pressing of the flange 32 against the flat sealing gasket 2, which enables the subsequent pressing of the mold 4 to achieve a better deformation of the plate body 1.
In the above-described embodiment, the tendency of deformation of the inner wall of the through-hole and of the hollow cylindrical section 31 inwardly is advantageous, and in order to further amplify the above-described advantageous effects, the annular projection 41 is inclined toward the axis in the extrusion direction. Referring to fig. 6, namely: make the cross-section of annular protrusion 41 for asymmetric structure, the peak is inboard slope can, this kind of mode can make plate body 1 obtain promoting because of the protruding trend of extrusion deformation inside, of course, need emphasize, the deformation here may be that the naked eye is visible, also may be that the naked eye is difficult to perceive, but to the part structure that has laminated originally, but stability and the sealed effect of connection can effectual improvement to the deformation of this kind of degree. In order to ensure the above technical effects, the wall thickness of the convex edge 32 and the wall thickness of the hollow cylindrical section 31 should not be too large, and preferably less than or equal to 2 mm.
As a preference of the above embodiment, the hollow cylindrical body section 31 is inserted in place with respect to the through hole and then extends beyond the surface of the plate body 1, which is intended to improve the welding effect and to facilitate the visual observation to obtain stable welding quality; wherein, the height of the hollow cylinder section 31 exceeding the surface of the plate body 1 is less than or equal to 3mm, thereby ensuring the aesthetic property and realizing the effective covering of the solder.
Wherein, the hollow cylinder section 31 is provided with a chamfer structure for the inboard edge of the other side of the convex edge 32 setting end to on the one hand can realize the direction that follow-up body 5 was inserted, on the other hand also can hold the solder, thereby improves connection effect and aesthetic property.
As shown in fig. 7 and 8, in a tube-to-tube plate connection method, the tube plate welding method is adopted, and at least one annular groove 51 is formed in the periphery of the adopted tube body 5, and an O-shaped sealing ring is arranged in the annular groove 51;
the method for connecting the tube body 5 and the tube plate comprises the following steps:
before the hollow cylinder section 31 and the plate body 1 are welded and fixed in the tube plate welding method, the tube body 5 is inserted from the other side of the end, opposite to the convex edge 32, of the hollow cylinder section 31 until the end of the tube body 5 exceeds or reaches the end of the hollow cylinder section 31, and an O-shaped sealing ring is ensured to be attached to the inner wall of the hollow cylinder section 31 to realize sealing;
and performing welding action, and fixedly connecting the intermediate body 3 and the plate body 1 by welding, and meanwhile, fixedly connecting the pipe body 5 with the intermediate body 3 and the plate body 1.
By adopting the tube plate welding method in the above embodiment and inserting the tube body 5 before the welding action is performed in the tube plate welding method, the tube body 5 can be welded and fixed synchronously with the intermediate body 3 and the plate body 1 by performing the welding action, and also, the welding here is free from considering the sealing property; because there is no axial relative motion between the pipe body 5 and the intermediate body 3, the actual sealing requirement can be satisfied by the arrangement of the O-ring, and in addition, the deformation generated by the plate body 1 and the hollow cylinder section 31 due to the pressing of the convex edge 32 by the mold 4 can also increase the sealing effect to a certain extent.
Preferably, the annular groove 51 is disposed at a position between two opposite side edges of the hollow cylinder section 31 in the axial direction, so as to prevent heat generated during the welding process from affecting the O-ring, and prevent the deformation from affecting the O-ring, thereby achieving a predetermined technical effect therebetween.
In the using process of the pipe body 5, the requirement of axial movement does not exist, so that the method disclosed by the invention can sufficiently meet the actual positioning requirement, and the welding difficulty is greatly reduced. As a preference of the above embodiment, before the hollow cylindrical section 31 is welded and fixed to the plate body 1, specifically, after the intermediate body 3 is completely mounted with respect to the through hole, and before the die 4 presses the flange 32. To describe the method of connecting the tube body 5 and the tube sheet in the present invention in detail, the following two embodiments are exemplified:
example two:
as shown in fig. 9, the method for connecting the tube body 5 to the tube sheet includes the steps of:
a1: sleeving the sealing flat gasket 2 on the periphery of the hollow cylinder section 31, and inserting the hollow cylinder section 31 into the through hole from one end of the plate body 1 until the convex edge 32 presses the sealing flat gasket 2 on the surface of one side of the plate body 1;
a2: a fixed plate body 1;
a3: the convex edge 32 is pressed by a mould 4, the pressing position of the mould 4 is an annular bulge 41, the axis of the annular bulge 41 is coincident with the axis of the hollow cylinder section 31, the extrusion causes the convex edge 32 to be convex towards the plate body 1, and an annular recess is formed on the surface of the plate body 1 by the extrusion of the plate body 1;
a4: the sealing flat gasket 2 is clamped between the annular recess and the convex part of the convex edge 32;
a5, inserting the pipe 5 from the other side of the hollow cylinder section 31 opposite to the end where the convex edge 32 is arranged until the end of the pipe 5 exceeds the end of the hollow cylinder section 31 and ensuring the O-shaped sealing ring to be attached to the inner wall of the hollow cylinder section 31 to realize sealing;
a6: the pressing state is maintained, the welding action is executed, and the intermediate body 3 and the plate body 1 are fixedly connected through welding, and meanwhile, the pipe body 5 is fixedly connected with the intermediate body 3 and the plate body 1 through welding.
In this embodiment, after the step a4 is completed, the inner wall of the hollow cylindrical section 31 will have a slight inward convex tendency, so that the tube 5 needs to pass through the hollow cylindrical section 31 by hard pressing during the step a5, which can meet the technical requirement of the present invention, but may destroy the established sealing form between the hollow cylindrical section 31 and the tube 5 due to deformation during the pressing process of the mold 4 to a certain extent; thus, as another preferred embodiment, before the hollow cylindrical section 31 is welded and fixed to the plate body 1, specifically, after the intermediate body 3 is mounted with respect to the through hole, and before the mold 4 presses the flange 32, see the following examples.
Example three:
as shown in fig. 10, the method for connecting the tube body 5 to the tube sheet includes the steps of:
b1: sleeving the sealing flat gasket 2 on the periphery of the hollow cylinder section 31, and inserting the hollow cylinder section 31 into the through hole from one end of the plate body 1 until the convex edge 32 presses the sealing flat gasket 2 on the surface of one side of the plate body 1;
b2: a fixed plate body 1;
b3, inserting the pipe 5 from the other side of the hollow cylinder section 31 opposite to the end where the convex edge 32 is arranged until the end of the pipe 5 reaches the end of the hollow cylinder section 31 and ensuring that the O-shaped sealing ring is attached to the inner wall of the hollow cylinder section 31 to realize sealing;
b4: the convex edge 32 is pressed by a mould 4, the pressing position of the mould 4 is an annular bulge 41, the axis of the annular bulge 41 is coincident with the axis of the hollow cylinder section 31, the extrusion causes the convex edge 32 to be convex towards the plate body 1, and an annular recess is formed on the surface of the plate body 1 by the extrusion of the plate body 1;
b5: the sealing flat gasket 2 is clamped between the annular recess and the convex part of the convex edge 32;
b6: the pressing state is maintained, the welding action is executed, and the intermediate body 3 and the plate body 1 are fixedly connected through welding, and meanwhile, the pipe body 5 is fixedly connected with the intermediate body 3 and the plate body 1 through welding.
In this way, after the pipe body 5 is inserted, the mold 4 is extruded, so that the pipe body 5 can be stably fixed, and when the hollow cylinder section 31 is extruded by the deformation of the plate body 1, the deformation form of the hollow cylinder section can adapt to the outer wall of the inserted pipe body 5, so that a better sealing and fitting form can be established between the hollow cylinder section and the outer wall of the pipe body 5.
A heat exchanger adopts the method for connecting the tube body 5 and the tube plate to realize the fixed connection of the tube body 5 and the tube plate, thereby effectively reducing the processing cost of the obtained heat exchanger and obtaining longer service life.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A tube plate welding method is characterized in that the method is used for welding a tube plate consisting of a plate body, a sealing flat gasket and an intermediate body; the plate body comprises a plurality of through holes; the intermediate body comprises a hollow cylinder section and a convex edge, the outer wall of the hollow cylinder section is attached to the inner wall of the through hole, and the convex edge is led out from the end part of one side of the hollow cylinder section along the radial direction; the sealing flat gasket is flat and is clamped between the plate body and the convex edge;
the tube plate welding method comprises the following steps:
fixing the plate body;
sleeving the sealing flat gasket on the periphery of the hollow cylinder section, and inserting the hollow cylinder section into the through hole from one end of the plate body until the convex edge presses the sealing flat gasket on the surface of one side of the plate body;
pressing the convex edge through a mold, wherein the pressing position of the mold is an annular bulge, the axis of the annular bulge is coincident with the axis of the hollow cylindrical section, the convex edge is protruded towards the plate body through pressing, and an annular recess is formed on the surface of the plate body through pressing the plate body;
the sealing flat gasket is clamped between the annular concave part and the convex part of the convex edge;
keeping a pressing state, welding the other side of the hollow cylinder section, and fixedly connecting the intermediate body and the plate body through welding;
the annular projection is inclined toward the axis in the pressing direction.
2. A tube sheet welding method as set forth in claim 1, wherein the fixing of the plate body includes at least supporting on the other side surface of the plate body at a supporting position corresponding to the pressing position of the die.
3. A tube sheet welding method as set forth in claim 1, wherein the hollow cylindrical section is interference-fitted with the penetration hole.
4. A tube sheet welding method as claimed in claim 1, wherein an inside edge of the hollow cylinder section on the other side with respect to the convex edge disposed end is provided with a chamfered structure.
5. A tube sheet welding method according to any one of claims 1 to 4, wherein the hollow cylindrical body section is inserted into position with respect to the through hole, and then extends beyond the surface of the plate body.
6. A tube sheet welding method as set forth in claim 5, wherein the height of the hollow cylinder section beyond the plate body surface is 3mm or less.
7. A pipe body and pipe plate connecting method is characterized in that the pipe plate welding method according to any one of claims 1-6 is adopted, at least one annular groove is arranged on the periphery of the adopted pipe body, and an O-shaped sealing ring is arranged in the annular groove;
the method for connecting the tube body and the tube plate comprises the following steps:
before the hollow cylinder section and the plate body are welded and fixed in the tube plate welding method, inserting a tube body from the other side of the hollow cylinder section, which is opposite to the convex edge setting end, until the end of the tube body reaches or exceeds the end of the hollow cylinder section, and ensuring that the O-shaped sealing ring is attached to the inner wall of the hollow cylinder section to realize sealing;
and executing a welding action, and realizing the welding fixed connection of the pipe body, the intermediate body and the plate body while fixedly connecting the intermediate body and the plate body by welding.
8. A method for connecting a tube body and a tube plate according to claim 7, wherein before the hollow cylindrical section and the plate body are welded and fixed, specifically, after the intermediate body is completely installed with respect to the through hole, and before the mold presses the flange.
9. A heat exchanger, characterized in that the fixed connection of the tube body and the tube plate is realized by the method for connecting the tube body and the tube plate according to claim 8.
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| CN202111637596.2A CN113996964B (en) | 2021-12-30 | 2021-12-30 | Tube plate welding method, tube body and tube plate connecting method and heat exchanger |
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| CN114484905B (en) * | 2022-02-08 | 2022-09-27 | 枣庄福源环能机械制造有限公司 | Water heater inner tank with upright post internal pressure reducing component |
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