CN219796421U - Tube plate hole slotting structure and connecting structure - Google Patents
Tube plate hole slotting structure and connecting structure Download PDFInfo
- Publication number
- CN219796421U CN219796421U CN202320915484.7U CN202320915484U CN219796421U CN 219796421 U CN219796421 U CN 219796421U CN 202320915484 U CN202320915484 U CN 202320915484U CN 219796421 U CN219796421 U CN 219796421U
- Authority
- CN
- China
- Prior art keywords
- tube
- plate hole
- tube plate
- hole
- tube sheet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 64
- 229910052802 copper Inorganic materials 0.000 claims abstract description 64
- 239000010949 copper Substances 0.000 claims abstract description 64
- 230000003746 surface roughness Effects 0.000 claims description 5
- 238000003754 machining Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 10
- 238000003466 welding Methods 0.000 description 8
- 238000007789 sealing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 206010023230 Joint stiffness Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Installation Of Indoor Wiring (AREA)
Abstract
The utility model belongs to the technical field of tube plate hole machining, and particularly relates to a tube plate hole slotting structure and a connecting structure, wherein the tube plate hole slotting structure is provided with an annular groove and threads in a tube plate hole; the annular grooves at least comprise two annular grooves which are respectively arranged in the holes of the pipe plate at intervals; the threads are disposed between an end face of the tube sheet bore to the annular groove adjacent the end face. The tube sheet hole connection structure includes: the tube plate is provided with the tube plate hole grooving structure; and the copper pipe is expanded and connected in the pipe plate hole of the pipe plate. Through this tube sheet hole slotting structure and connection structure, increased the pull-out force between copper pipe and the tube sheet hole, improved the expanded joint leakproofness.
Description
Technical Field
The utility model belongs to the technical field of tube plate hole machining, and particularly relates to a tube plate hole grooving structure.
The utility model also relates to a tube plate hole connecting structure.
Background
The copper pipe has good heat conduction property, so the copper pipe is widely applied to air conditioning and heat pump units, and the main mode of connecting the copper pipe and the tube plate is a mode of welding, expansion joint or welding and expansion joint combination. The copper pipe is directly welded in the pipe plate hole by adopting a welding method; the expansion joint method is that the pipe ends penetrating into the pipe plate holes and the pipe plate holes are expanded by using a pipe expander or through explosion expansion, so that the pipes are plastically deformed, the pipe plate holes are elastically deformed, and the pipe plate elastic restoring force firmly combines the pipes with the pipe plate, thereby achieving the purposes of sealing and resisting pull-out.
However, in the process of welding the copper pipe and the pipe plate, because the thermal expansion coefficient of the copper is large, larger shrinkage stress is generated during solidification, and the copper pipe is easy to crack and deform; in the expansion joint process of the copper pipe and the pipe plate, the copper pipe and the pipe plate holes are easy to connect and are not firm from the perspective of pulling-out force; from the aspect of tightness, the sealing effect between the copper pipe and the pipe plate hole is poor.
Disclosure of Invention
In order to improve the connection effect and the tightness between the copper pipe and the pipe plate hole, and the copper pipe is not damaged in the connection process, the utility model provides a pipe plate hole slotting structure which is convenient for the copper pipe to be expanded and connected with the pipe plate hole, and improves the expanded and connected tightness;
the annular grooves at least comprise two annular grooves which are respectively arranged in the holes of the pipe plate at intervals;
the threads are disposed between an end face of the tube sheet bore to the annular groove adjacent the end face.
According to the grooved structure of the tube plate hole, the annular groove extends outwards by 1mm from the tube plate hole.
According to the grooved structure of the tube plate hole, the groove width of the annular groove is at least 3mm, and the groove depth of the annular groove is between 0.5mm and 0.8 mm.
According to the grooved structure of the tube plate hole, the surface roughness of the annular groove is at least 1.6um.
According to the grooved structure of the tube plate hole, the spacing distance between two adjacent annular grooves is at least 6mm.
According to the grooved structure of the tube plate hole, the annular groove and the tube plate hole are coaxially arranged.
According to the grooved structure of the tube plate hole, the annular groove is a rectangular groove.
According to the grooved structure of the tube plate hole, the thread depth of the thread is at least 0.2mm.
According to the grooved structure of the tube plate hole, chamfer angles are inwards arranged on the end faces of the two ends of the tube plate hole.
The utility model also provides a tube plate hole connecting structure, which comprises:
the tube plate is provided with the tube plate hole grooving structure;
and the copper pipe is expanded and connected in the pipe plate hole of the pipe plate.
The utility model has the beneficial effects that:
the grooved structure of the tube plate hole provided by the utility model is provided with at least two annular grooves at intervals in the hole, and threads are arranged between the end surface of the tube plate hole and the annular groove adjacent to the end surface.
From the angle of pulling-out force, as the threads are arranged in the tube plate hole, the pulling-out force between the copper tube and the tube plate hole is increased, so that the connection strength between the copper tube and the tube plate hole is high, and the axial pulling-out resistance is high; from the angle of leakproofness, because the ring channel of this tube sheet hole inside seting up is smooth surface, so improved the expansion joint leakproofness of copper pipe for the outer wall and the tube sheet hole of copper pipe closely laminate, avoided shell side medium to get into the ring gap, can effectively prevent to produce the clearance corruption between the ring gap of copper pipe outer wall and tube sheet hole, prolonged life.
Drawings
In order to more clearly illustrate the utility model or the technical solutions in the related art, the drawings used in the description of the embodiments or the related art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a structural isometric view of a tube sheet hole slotting structure provided by the present utility model;
FIG. 2 is a structural elevation view of the tube sheet hole slotting structure provided by the present utility model;
fig. 3 is a schematic structural view of a tube plate hole connection structure provided by the utility model.
Reference numerals: 1. a tube sheet; 2. a tube plate hole; 3. an annular groove; 4. a thread; 5. copper pipe.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the embodiments of the present utility model, it should be noted that the terms "center," "upper," "lower," "vertical," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the embodiments of the present utility model and simplifying the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present utility model. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present utility model will be understood in detail by those of ordinary skill in the art.
Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The tube plate hole slotting structure and the connecting structure provided by the utility model are described below with reference to the attached drawings.
As shown in fig. 1, a structural isometric view of a grooved structure of a tube plate hole is provided, and as can be seen from the figure, the tube plate 1 is provided with two annular grooves 3 which are spaced from each other in the tube plate hole 2, the annular grooves 3 are rectangular grooves and are coaxially arranged with the tube plate hole 2, and particularly, the annular grooves 3 are positioned at a position close to the middle of the tube plate hole 2; threads 4 are provided between the end face of the tube plate hole 2 and the annular groove 3 adjacent to the tube plate hole 2, i.e. internal threads 4 are provided at both ends of the tube plate hole 2, and the two annular grooves 3 and the area between the two annular grooves 3 are smooth surfaces. With such a design, from the perspective of pulling-off force, it is necessary to increase the friction force between the copper tube 5 and the tube plate hole 2, namely by providing the screw thread 4 to achieve the above object; from the viewpoint of tightness, it is necessary to reduce the friction between the copper tube 5 and the tube sheet hole 2, i.e., to set the two annular grooves 3 and the area between the two annular grooves 3 to smooth surfaces for achieving the above-mentioned object.
As shown in fig. 2, a structural elevation view of the tube plate hole slotting structure is provided, and the tube plate hole slotting structure is more fully shown, wherein the diameter of the annular groove 3 is 1mm larger than that of the tube plate hole 2 on the same section, for example, the diameter of the tube plate hole 2 is 16.2mm, and then the diameter of the annular groove 3 is 17.2mm, namely, the annular groove 3 extends outwards by 1mm on the basis of the tube plate hole 2; further, the groove width of the annular groove 3 was 3mm, the distance between the annular groove 3 and the end face of the tube plate hole 2 was 10mm, and the distance between the two annular grooves 3 was 6mm.
As shown in fig. 3, a schematic structural diagram of a tube plate hole connection structure is provided, and as can be seen from the figure, the connection structure comprises a copper tube 5 and a tube plate 1, wherein the tube plate 1 is provided with the tube plate hole grooving structure, and the copper tube 5 is expanded in a tube plate hole 2 of the tube plate 1.
In order to better understand the above technical solution, the following describes in detail each specific embodiment of the tube plate hole slotting structure and the connection structure.
According to an embodiment of the first aspect provided by the present utility model, referring to fig. 1-2, there is provided a tube sheet hole grooving structure, the tube sheet hole 2 being internally provided with an annular groove 3 and threads 4;
wherein, the annular groove 3 comprises at least two annular grooves which are respectively arranged in the pipe plate holes 2 at intervals;
the screw thread 4 is provided between the end face of the tube plate hole 2 to the annular groove 3 adjacent to the end face.
The copper pipe has good heat conduction property, so the copper pipe is widely applied to air conditioning and heat pump units, and the main mode of connecting the copper pipe and the tube plate is a mode of welding, expansion joint or welding and expansion joint combination. The copper pipe is directly welded in the pipe plate hole by adopting a welding method; the expansion joint method is that the pipe ends penetrating into the pipe plate holes and the pipe plate holes are expanded by using a pipe expander or through explosion expansion, so that the pipes are plastically deformed, the pipe plate holes are elastically deformed, and the pipe plate elastic restoring force firmly combines the pipes with the pipe plate, thereby achieving the purposes of sealing and resisting pull-out.
However, in the welding process of the copper pipe and the pipe plate, because the thermal expansion coefficient of the copper is large, larger shrinkage stress is generated during solidification, and the copper pipe is easy to crack and deform; in the expansion joint process of the copper pipe and the pipe plate, the copper pipe and the pipe plate holes are easy to connect and are not firm from the perspective of pulling-out force; from the aspect of tightness, the sealing effect between the copper pipe and the pipe plate hole is poor.
Therefore, in order to solve the above-mentioned problem, the grooved structure of tube plate hole provided in this embodiment is provided with at least two annular grooves 3 spaced apart in the hole interior, and is provided with the screw thread 4 between the terminal surface of tube plate hole 2 and the annular groove 3 adjacent to this terminal surface, adopts such design, and two or more annular grooves 3 have improved the expansion success rate that copper tube 5 expands and connects in tube plate hole 2, and screw thread 4 has increased the frictional force between copper tube 5 and tube plate hole 2.
From the angle of pulling-out force, as the thread 4 is arranged in the tube plate hole 2, the pulling-out force between the copper tube 5 and the tube plate hole 2 is increased, so that the connection strength between the copper tube 5 and the tube plate hole 2 is high, and the axial pulling-out resistance is strong; from the angle of leakproofness, because the ring channel 3 of this tube sheet hole 2 inside seting up is smooth surface, so improved the expansion joint leakproofness of copper pipe 5 for the outer wall of copper pipe 5 closely laminates with tube sheet hole 2, has avoided shell side medium to get into the ring gap, can prevent effectively that producing the clearance corruption between the ring gap of copper pipe 5 outer wall and tube sheet hole 2, has prolonged life.
According to the tube plate hole grooving structure provided by the embodiment, the annular groove 3 extends outwards by 1mm from the tube plate hole 2. I.e. on the same cross section, the diameter of the annular groove 3 is larger than the diameter of the tube plate hole 2 by more than 1mm, for example, the diameter of the tube plate hole 2 is 16.2mm, and the diameter of the annular groove 3 is 17.2mm.
According to the grooved structure of the tube plate hole provided by the embodiment, the groove width of the annular groove 3 is at least 3mm, and the groove depth of the annular groove 3 is between 0.5mm and 0.8 mm.
In this embodiment, the diameter of the tube plate hole 2 formed in the tube plate 1 is 16.2mm, so that an annular groove 3 with a groove width of 3mm and a groove depth of 0.8mm is correspondingly formed in the tube plate hole 2, wherein the groove width and the groove depth of the annular groove 3 can be correspondingly adjusted according to the diameter of the tube plate hole 2, so as to meet the requirement of expansion joint of the copper tube 5, and improve the success rate of expansion joint of the copper tube 5.
According to the tube plate hole grooving structure provided by the embodiment, the surface roughness of the annular groove 3 is at least 1.6um.
In order to improve the tightness of the copper tube 5 during expansion connection, the outer wall of the copper tube 5 is tightly attached to the tube plate hole 2, and the annular gap between the copper tube 5 and the tube plate hole 2 is eliminated, so that the friction force between the copper tube 5 and the tube plate hole 2 needs to be reduced, and the smoother the tube plate hole 2 is, in this embodiment, preferably, the surface roughness of the annular groove 3 and the area between the annular grooves 3 is set to be 1.6um.
According to the tube plate hole grooving structure provided by the embodiment, the interval distance between two adjacent annular grooves 3 is at least 6mm.
In order to ensure the success rate of the expansion of the copper pipe 5, the spacing distance between the adjacent two annular grooves 3 cannot be too large or too small, and in this embodiment, it is preferable that the spacing distance between the adjacent two annular grooves 3 is set to 6mm. It will be appreciated that the spacing distance between annular grooves 3 may be adjusted accordingly to the diameter of tube plate holes 2.
According to the grooved structure of the tube plate hole provided by the embodiment, the annular groove 3 and the tube plate hole 2 are coaxially arranged.
According to the tube plate hole grooving structure provided in the present embodiment, preferably, the annular groove 3 is a rectangular groove.
It will be appreciated that instead of rectangular grooves, the annular groove 3 may be an arcuate groove or a V-shaped groove, and the shape of the annular groove 3 is not limited singly.
According to the tube plate hole grooving structure provided by the embodiment, the thread depth of the thread 4 is at least 0.2mm.
In order to increase the pull-out force between the copper tube 5 and the tube plate hole 2 so that the copper tube 5 and the tube plate hole 2 are tightly connected, it is necessary to increase the friction force between the copper tube 5 and the tube plate hole 2, and the coarser the tube plate hole 2 is, therefore, in the present embodiment, it is preferable to set the depth of the screw thread 4 to 0.2mm.
Further, since the threads 4 are provided at both end positions of the tube plate hole 2, a machining operation is facilitated.
According to the grooved structure of the tube plate hole provided by the embodiment, chamfer angles are inwards arranged on the end faces of the two ends of the tube plate hole 2. By providing a chamfer, the copper tube 5 is conveniently assembled into the tube plate hole 2.
The tube plate hole grooving structure comprises at least four processing procedures: firstly, machining a tube plate hole 2 on a tube plate 1, and drilling a through hole with the diameter of 16mm by a numerical control drilling machine; milling two annular grooves 3 in the tube plate hole 2 by using a milling cutter; then, a boring cutter with the diameter of 16.2mm is used for processing the surface roughness of the annular groove 3 to 1.6um; finally, internal threads 4 with a depth of 0.2mm are machined at both ends of the tube plate hole 2.
According to the tube plate hole slotting structure provided by the embodiment, from the angle of pulling-out force, as the threads 4 are arranged in the tube plate hole 2, the pulling-out force between the copper tube 5 and the tube plate hole 2 is increased, so that the connection strength between the copper tube 5 and the tube plate hole 2 is high, and the axial pulling-out resistance is high; from the angle of leakproofness, because the ring channel 3 of this tube sheet hole 2 inside seting up is smooth surface, so improved the expansion joint leakproofness of copper pipe 5 for the outer wall of copper pipe 5 closely laminates with tube sheet hole 2, has avoided shell side medium to get into the ring gap, can prevent effectively that producing the clearance corruption between the ring gap of copper pipe 5 outer wall and tube sheet hole 2, has prolonged life.
According to an embodiment of the second aspect of the present utility model, referring to fig. 3, there is provided a tube sheet hole connection structure, including:
a tube plate 1, wherein the tube plate 1 is provided with a tube plate hole grooving structure in the embodiment;
copper tubes 5, the copper tubes 5 are expanded and connected in the tube plate holes 2 of the tube plate 1.
According to the tube plate hole connecting structure provided by the embodiment, the pull-out force between the copper tube 5 and the tube plate hole 2 is increased in an expansion joint mode, the expansion joint tightness is improved, and meanwhile, the copper tube 5 cannot be damaged.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present utility model without undue burden.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. The tube plate hole slotting structure is characterized in that an annular groove (3) and threads (4) are arranged in the tube plate hole (2);
the annular grooves (3) at least comprise two annular grooves which are respectively arranged in the tube plate holes (2) at intervals;
the thread (4) is arranged between the end face of the tube plate hole (2) and the annular groove (3) adjacent to the end face.
2. Tube sheet hole slotting structure according to claim 1, characterized in that the annular groove (3) extends 1mm outwards from the tube sheet hole (2).
3. Tube sheet hole slotting structure according to claim 1, characterized in that the slot width of the annular slot (3) is at least 3mm, the slot depth of the annular slot (3) being between 0.5mm and 0.8 mm.
4. Tube sheet hole grooving structure according to claim 1, characterized in that the surface roughness of the annular groove (3) is set to at least 1.6um.
5. Tube sheet hole slotting structure according to claim 1, wherein the distance between two adjacent annular grooves (3) is at least 6mm.
6. Tube sheet hole slotting structure according to claim 1, characterized in that the annular groove (3) and the tube sheet hole (2) are coaxially arranged.
7. A tube sheet hole slotting structure according to any one of claims 1-6, wherein the annular grooves (3) are rectangular grooves.
8. Tube sheet hole slotting structure according to claim 1, wherein the thread depth of the threads (4) is at least 0.2mm.
9. Tube plate hole grooving structure according to claim 1, characterized in that both end faces of the tube plate hole (2) are provided with chamfers inwards.
10. A tube sheet hole connection structure, comprising:
a tube sheet (1), wherein the tube sheet (1) is provided with a tube sheet hole grooving structure as claimed in any one of claims 1 to 9;
the copper pipe (5) is connected in the pipe plate hole (2) of the pipe plate (1) in an expansion mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320915484.7U CN219796421U (en) | 2023-04-21 | 2023-04-21 | Tube plate hole slotting structure and connecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320915484.7U CN219796421U (en) | 2023-04-21 | 2023-04-21 | Tube plate hole slotting structure and connecting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219796421U true CN219796421U (en) | 2023-10-03 |
Family
ID=88176086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320915484.7U Active CN219796421U (en) | 2023-04-21 | 2023-04-21 | Tube plate hole slotting structure and connecting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219796421U (en) |
-
2023
- 2023-04-21 CN CN202320915484.7U patent/CN219796421U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102410672B (en) | Parallel-flow heat exchanger and preparation method thereof | |
| CN1203355A (en) | Heat exchanger | |
| CN109813144B (en) | High-efficient scrubbing profit universal radiator | |
| CN110459832B (en) | Heat exchange device | |
| CN219796421U (en) | Tube plate hole slotting structure and connecting structure | |
| CN203687743U (en) | Fluoroplastic tubular heat exchanger heat exchange tube and tube plate connected structure | |
| CN215444666U (en) | Square pipe connecting structure | |
| CN113015418A (en) | Heat radiation structure | |
| CN117587921A (en) | Hollow bolt ball, net rack node and manufacturing and using methods | |
| CN203687741U (en) | Connecting structure for heat exchange tubes and tube plate of heat exchanger | |
| CN213899068U (en) | Steam turbine high, intermediate pressure cylinder cat claw supporting cushion block | |
| CN113714607B (en) | Method for processing main fuel pipe of gas turbine | |
| CN214747413U (en) | Split type interface brazing plate heat exchanger | |
| CN113644336B (en) | Battery box and battery pack with same | |
| CN216245788U (en) | Hydrogen cooler holds tube sheet and cooling tube intensity expanded joint structure | |
| CN217976372U (en) | Novel truck water inlet pipe assembly | |
| CN218510409U (en) | High-temperature-resistant axial expansion joint | |
| CN218034625U (en) | Anti-fatigue heat exchange tube and tube plate connecting structure | |
| CN220891385U (en) | Connecting piece for pipe connection | |
| CN108332602A (en) | Plate heat exchanger take over assembling structure | |
| CN219019140U (en) | Connecting piece and circuit board | |
| CN213299121U (en) | Stainless steel or copper friction welding movable joint | |
| CN217952767U (en) | Ultra-thin wall antarafacial return air pipe subassembly | |
| CN220731235U (en) | Water-cooled electrode device | |
| CN220206458U (en) | High-efficient connection type heat exchanger combination grating plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |