CN211953835U - Heat exchanger shell side terminating weld groove structure - Google Patents
Heat exchanger shell side terminating weld groove structure Download PDFInfo
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- CN211953835U CN211953835U CN202020353266.5U CN202020353266U CN211953835U CN 211953835 U CN211953835 U CN 211953835U CN 202020353266 U CN202020353266 U CN 202020353266U CN 211953835 U CN211953835 U CN 211953835U
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- backing ring
- ring
- weld groove
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Abstract
The utility model relates to the technical field of heat exchanger manufacturing, and discloses a heat exchanger shell side terminating weld groove structure, which comprises a shell section, wherein a terminating weld groove a is processed at the end part of the shell section in the circumferential direction, a process backing ring is arranged in the shell section corresponding to the terminating weld groove, the process backing ring is coaxially arranged with the shell section, the process backing ring partially extends out of the shell section, a backing plate and a terminating weld groove a are processed at the part of the process backing ring extending out of the shell section, a backing plate is directly processed at the part of the process backing ring extending out of the shell section, the processing is convenient, the thickness of the shell section does not need to be additionally increased, the manufacturing cost and the manufacturing period are greatly saved, when the process backing ring is butted with the shell section, the process backing ring not only supports the shell section, but also controls the thickness of the process backing ring, can meet the butt joint requirement of the shell cylinder body with ellipticity.
Description
Technical Field
The utility model belongs to the technical field of the heat exchanger manufacturing technology and specifically relates to a heat exchanger shell side termination welding seam groove structure.
Background
Depending on design performance and specifications, the shell-side terminating welds of the heat exchanger are typically not placed at the shell-to-tube sheet annular seam, but between the shell barrel 23 and the shell barrel section 21, as shown in fig. 1, whereas the conventional heat exchanger shell terminating annular seams 22 are beveled as shown in fig. 2.
The traditional machining of the terminating circular seam groove structure is that as shown in fig. 3 and 4, a section of backing plate 24 and a terminating welding seam groove a26 are machined at the end part of the shell cylinder section 21; specifically, as shown in fig. 5 and 6, a terminating weld groove b27 is formed at the end of the shell barrel 23, and the shell barrel is inserted into the shell barrel butt-welded to the end of the shell barrel to form a terminating circumferential weld 22. By adopting the processing mode, the thickness of the cushion plate needs to be increased on the shell cylinder section 21, then the cushion plate 24 is processed on the shell cylinder section 21, the shell cylinder body 23 is inserted into the cushion plate 24 on the shell cylinder section 21 and then is welded and butted, the structure is equivalent to a form with the cushion plate, the outer diameter size of the shell cylinder section is the same as that of the shell cylinder body, the thickness of the shell cylinder section is greater than that of the shell cylinder body, and therefore, the thickness of the shell cylinder section of the equipment is increased, and the weight and the cost are increased.
And because the shell cylinder body is made of steel plates, the shell cylinder body generates ovality after being rolled, in order to ensure that the ovality is matched with a base plate on the shell cylinder section, a step 25 higher than the inner diameter of the shell cylinder body is required to be processed on a groove of the shell cylinder body 23, as shown in figure 6, the step is high in machining difficulty, large in workload and high in cylinder section manufacturing cost.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem be: the heat exchanger shell side end-terminating circular seam groove and the manufacturing method are provided, the manufacturing is very simple and convenient, the thickness of the shell cylinder section of the heat exchanger is reduced, the phenomenon that steps need to be machined due to the ovality of the shell cylinder body is avoided, and the manufacturing cost is greatly reduced.
The utility model discloses a theory of operation: the technical backing ring with the opening is additionally arranged in the shell cylinder section of the heat exchanger, the part of the technical backing ring extends out of the shell cylinder section, a backing plate is directly machined at the part, extending out of the shell cylinder section, of the technical backing ring, machining is convenient, the thickness of the shell cylinder body does not need to be additionally increased, the manufacturing cost and the manufacturing period are greatly saved, when the technical backing ring is in butt joint with the shell cylinder body, the technical backing ring can support the shell cylinder body, meanwhile, the thickness of the technical backing ring is controlled, and the butt joint requirement of the technical backing ring and the shell cylinder body with ovality can be met.
Based on the above working principle the utility model discloses a technical scheme is: a heat exchanger shell side terminating weld groove structure comprises an outer shell cylinder section, wherein a terminating weld groove a is machined in the circumferential direction of the end portion of the outer shell cylinder section, a process backing ring is arranged in the outer shell cylinder section corresponding to the terminating weld groove, the process backing ring and the outer shell cylinder section are coaxially arranged, the process backing ring partially extends out of the outer shell cylinder section, and a backing plate and the terminating weld groove a are machined in the portion, extending out of the outer shell cylinder section, of the process backing ring.
Furthermore, the thickness of the process backing ring is more than or equal to 6mm, the thickness of the process backing ring is determined according to the ovality existing in the shell cylinder body, and the thickness of the process backing ring is required to be larger than the value of the maximum ovality.
Further, the width of the process backing ring is 40mm, and the width of the process backing ring is finally determined by considering factors such as machining equipment capacity, technical requirements and cost.
Furthermore, the process backing ring is formed by splicing at least two opening backing rings, so that the process backing ring and the shell cylinder section are convenient to mount.
Compared with the prior art, the utility model the advantage lie in:
1. the utility model discloses increase open-ended technology backing ring inside the shell ring of heat exchanger, outside technology backing ring part stretched out the shell ring, utilized the outer partial processing backing plate of the outer shell ring of the overhanging shell ring of technology backing ring, can practice thrift the thickness surplus of shell ring, also can practice thrift shell stack shell and shell ring machine cost-addition, great saving manufacturing cost and manufacturing period.
2. The utility model discloses the machining dimension of technology backing ring upper padding plate is the part that the technology backing ring stretches out the shell ring outside, and this machining dimension has guaranteed that shell ring thickness is not bodiness but termination circumferential weld backing plate form is unchangeable.
3. The utility model discloses thickness to technology backing ring is controlled, can eliminate the deviation of shell stack shell system ovality and to the influence of shell termination welding seam assembly size, only needs the machine to add corresponding groove on the shell stack shell groove that corresponds, need not need the machine to add the step like traditional mode, and the machine adds that the work load is less than traditional groove form.
Drawings
FIG. 1 is a schematic view of a conventional heat exchanger shell termination seam location.
FIG. 2 is an enlarged view of a portion I of FIG. 1.
Fig. 3 is a view showing a shell section structure of a conventional heat exchanger.
Fig. 4 is an enlarged view of a portion i of fig. 3.
Fig. 5 is a view showing a structure of a shell body of a conventional heat exchanger.
Fig. 6 is an enlarged view of a portion ii of fig. 5.
Fig. 7 is a structural view of the process backing ring of the present invention.
Fig. 8 is a schematic view of the installation of the process backing ring and the shell ring of the present invention.
Fig. 9 is an enlarged view of a portion i in fig. 8.
Fig. 10 is a structural view of the casing barrel of the present invention.
Fig. 11 is an enlarged view of a portion ii of fig. 10.
Reference numerals:
the prior art is as follows: 21-shell cylinder section, 22-terminating weld, 23-shell cylinder body, 24-backing plate, 25-step, 26-terminating weld groove a, 27-terminating weld groove b;
the application: 1-shell cylinder section, 2-end-terminating weld groove a, 3-process backing ring, 4-backing plate, 5-shell cylinder body and 6-end-terminating weld groove b.
Detailed Description
The invention will be further explained with reference to the following figures and examples:
the utility model discloses a heat exchanger shell side termination welding seam groove structure, including shell ring 1, the tip circumference of shell ring 1 is processed and is had termination welding seam groove a2, and the structure of shell ring 1 is as shown in figures 8, 9 for with the butt joint of shell shaft 5 that is processed and has termination welding seam groove b6 and weld, the structure of shell shaft 5 is as shown in figures 10, 11; arranging a process backing ring 3 in the shell cylindrical shell section 1 corresponding to the terminating weld groove a 2; in order to avoid processing the step in the shell stack shell, increase the processing degree of difficulty and work load, this application is installed technology backing ring 3 back in shell section 1, directly stretches out at technology backing ring 3 the outside partial processing backing plate 4 of shell stack shell section 1 and termination welding seam groove a2 for shell stack shell section external diameter size is unchangeable, and processing backing plate 4 and termination welding seam groove a2 directly adopt the digit control machine tool processing in the outside of shell stack shell section 1 can, the operation degree of difficulty is low, and the work load is little, does not need to process the step in the 5 insides of processing shell stack shell.
Preferably, the width of the part of the technological backing ring 3 extending out of the shell cylinder section 1 is equal to that of the non-extending part, for example, when the width of the technological backing ring 3 is 40mm, the width of the extending part is 20mm, and the width of the non-extending part is 20mm, so that the backing plate 4 meeting the requirement can be processed on the extending part, the welding fixation of the non-extending part and the shell cylinder section 1 can be ensured, and the specific width of the extending part and the non-extending part can be adjusted according to the actual requirement.
Preferably, the material of technology backing ring 3 adopts the same material with shell ring 1, technology backing ring 3 is formed by the concatenation of at least two opening backing rings, the installation of technology backing ring and shell ring is convenient for, the structure of opening backing ring is shown in figure 7, generally by the concatenation of two opening backing rings, form the piece between the tip of two opening backing rings, during the installation, place an opening backing ring in the shell ring corresponding position after, will open backing ring and shell ring 1 inner wall welding earlier, then put into another opening backing ring and weld it with shell ring 1, finally, form the closed ring after welding the piece of two opening backing ring tip.
When the process backing ring is installed, the process backing ring 3 is arranged at a position corresponding to a groove of a welding line to be processed, the process backing ring 3 and the shell cylindrical section 1 are coaxially arranged, and part of the process backing ring 3 extends out of the shell cylindrical section 1. The method is characterized in that a part of the process backing ring extending out of the shell cylinder section is used for processing the backing plate, as shown in figures 8 and 9, the structural form that the original shell cylinder section needs to be turned out of the backing plate by thickening the thickness of the shell cylinder section is ingeniously changed by adding the process backing ring, the manufacturing cost and the manufacturing period are greatly saved, when the process backing ring is in butt joint with the shell cylinder body, the process backing ring not only supports the shell cylinder body, but also can meet the butt joint with the shell cylinder body with ellipticity due to the adjustability of the outer diameter of the opening process backing ring.
Theoretically, the section of the cylinder body is a standard circle, but the cylinder body of the outer shell has ovality during rolling, as shown in fig. 10, even if the blanking and rolling of the cylinder section of the outer shell are strictly controlled, the ovality at least less than or equal to 3mm can be generated, and therefore, the thickness of the process backing ring 3 must be more than or equal to 6 mm. The thickness of the process backing ring 3 can be adjusted according to the ellipticity of the cylinder body of the shell, the influence of the rolling ellipticity deviation of the cylinder body of the shell on the assembly size of the terminating weld of the shell is eliminated due to the control of the thickness of the process backing ring, a corresponding groove is only required to be machined on a groove of the cylinder body of the shell correspondingly, steps are not required to be machined in the traditional mode, and the machining workload is less than that of the traditional groove mode.
According to the mechanical equipment capacity, the technical requirements required to be met by the terminating groove form and the comprehensive consideration of the manufacturing cost, the width of the technological backing ring 3 is the most appropriate size when being 40mm, and the size can meet the assembling requirement of the terminating welding seam of the shell cylinder body and the shell cylinder section.
The utility model discloses a heater shell side terminating welding seam groove structure makes according to following step:
s1: manufacturing an opening backing ring for splicing the process backing ring 3;
when the opening backing ring is blanked, the opening backing ring is subjected to scribing, shearing and rolling molding, two to three opening backing rings are generally molded on the same material plate, and the specific number of the opening backing rings is different due to the size of the backing rings.
Preferably, in order to ensure the size of the matching part of the shell cylinder section and the shell cylinder body, the blanking size of the opening backing ring is corrected according to the actual inner diameter size of the rolled shell cylinder section 1.
S2: installing the opening backing ring manufactured in the step S1 into the shell cylinder section 1, splicing to form a process backing ring 3, adding the process backing ring 3 into the shell cylinder section 1, wherein the width direction part of the process backing ring 3 extends out of the shell cylinder section 1, so that the processing of a backing plate is facilitated, and meanwhile, the thickness of the shell cylinder section 1 is not increased;
s3: welding and fixing the part of the technological backing ring 3 which does not extend out of the shell cylinder section with the shell cylinder section 1;
preferably, when the process backing ring 3 is welded with the shell cylinder section 1, the process backing ring 3 is welded on the wall of the shell cylinder section 1 in the circumferential direction to form a fillet weld, the position of the fillet weld is shown in fig. 9, the process backing ring and the shell cylinder section are welded into a whole, and the abutted seams between the opening backing rings are welded. After welding, nondestructive testing needs to be carried out on the fillet weld of the process backing ring 3 and the shell cylinder section 1 and the abutted seam of the process backing ring 3.
S4: and (3) processing a terminating circular seam bevel a2 on the shell cylinder section 1, specifically, after the part of the technological backing ring 3 which does not extend out of the shell cylinder section is welded and fixed with the shell cylinder section 1, processing a terminating circular seam bevel a2 and a backing plate 4 on the technological backing ring 3 and the shell cylinder section 1 together by adopting a numerical control vertical lathe for butt joint with the shell cylinder body 5.
Preferably, when the backing plate is processed, the processing size of the backing plate on the process backing ring 3 is the part of the process backing ring 3 extending out of the shell cylinder section 1, so that the thickness of the shell cylinder section is not thickened, but the form of the terminating circular seam backing plate is not changed.
The following vessel shell sizes are exemplified: if the traditional method for processing the terminating groove is adopted to process the shell barrel section made of 15CrMoR, the external dimension is phi 2250 multiplied by 80 multiplied by L1400mm, the blanking dimension is 80mm, 7275 multiplied by 1430mm, and the weight is 6533 Kg; when the manufacturing method of the utility model is adopted for processing, the external dimension is phi 2250 multiplied by 75 multiplied by L1400mm, the blanking dimension is 75mm, 7290 multiplied by 1430mm, and the weight is 6138 Kg; welding a process backing ring made of Q235B on the shell cylindrical section, wherein the external dimension of the process backing ring is phi 2100 multiplied by 6 multiplied by L40mm, the blanking dimension is 6mm, 6578 multiplied by 40mm, and the weight is 13 Kg; the manufacturing working hours of the process backing ring are 3 hours. The manufacturing method of the application reduces the thickness of the cylinder by 5mm, thereby reducing 395kg of 15CrMoR and saving the cost by about 2370 yuan; the cost of the process backing ring is increased by about 390 yuan; the welding cost of the process backing ring and the shell ring is about 26 yuan; the manufacturing cost of the process backing ring is about 180 yuan; the cost of magnetic powder inspection after welding the process backing ring and the shell ring is about 66 yuan; by adopting the manufacturing method, the cost is saved and the total cost is as follows: 2370 and 390-26-180-66 ═ 1708 yuan. The company produces 100 pieces of products in a year, and 1708X 100-170800 yuan can be saved. Meanwhile, after the process backing ring is added, the size of a blank is reduced, the purchase cost of materials is saved, the machining workload and the welding workload of the shell cylinder section are greatly reduced, and the manufacturing period and the cost are greatly reduced.
The details of the present invention not described in detail in the specification are well known to those skilled in the art.
Claims (4)
1. The utility model provides a heat exchanger shell side termination welding seam groove structure, includes shell ring (1), its characterized in that: a terminating weld groove a (2) is machined at the end part of the shell cylindrical shell section (1) in the circumferential direction, and a process backing ring (3) is arranged in the shell cylindrical shell section (1) corresponding to the terminating weld groove a (2); the technical backing ring (3) and the shell cylinder section (1) are coaxially arranged, the part of the technical backing ring (3) extends out of the shell cylinder section (1), and a backing plate (4) and a terminating weld groove a (2) are machined on the part of the technical backing ring (3) extending out of the shell cylinder section (1).
2. The heat exchanger shell side terminating weld groove structure of claim 1, wherein: the width of the process backing ring (3) is 40 mm.
3. The heat exchanger shell side terminating weld groove structure of claim 1 or 2, wherein: the thickness of the process backing ring (3) is more than or equal to 6 mm.
4. The heat exchanger shell side terminating weld groove structure of claim 3, wherein: the process backing ring (3) is formed by splicing at least two opening backing rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020353266.5U CN211953835U (en) | 2020-03-19 | 2020-03-19 | Heat exchanger shell side terminating weld groove structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020353266.5U CN211953835U (en) | 2020-03-19 | 2020-03-19 | Heat exchanger shell side terminating weld groove structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211953835U true CN211953835U (en) | 2020-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020353266.5U Active CN211953835U (en) | 2020-03-19 | 2020-03-19 | Heat exchanger shell side terminating weld groove structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211953835U (en) |
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- 2020-03-19 CN CN202020353266.5U patent/CN211953835U/en active Active
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