Narrow gap groove simulation test welding device
By designing a narrow gap bevel simulation trial welding device, and using welding bevel grooves and wing plate assembly grooves to form a narrow gap welding bevel, the problems of processing difficulty and material waste of narrow gap bevel are solved, and cost reduction and test efficiency are improved.
Patent Information
- Application Number
- CN202421612135.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-09
AI Technical Summary
In the process of narrow gap butt welding of large turbine welded rotors or thick-walled pipelines, the prior art is difficult to effectively utilize narrow gap bevels, resulting in high material waste and processing difficulties and high cost.
A narrow gap bevel simulation trial welding device is designed, including welded pipe fittings, sealing cover plates, sealing base plates and annular flat plate sections. A narrow gap welding bevel is formed through welding bevel grooves and wing plate assembly grooves to reduce the difficulty of bevel processing, and parts other than welded pipe fittings are reused after the test is completed.
It effectively reduces the processing difficulty and material waste of narrow gap bevels, reduces costs, and improves the efficiency of welding tests.
Smart Images
Figure CN222790930U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of narrow gap welding, in particular to a narrow gap groove simulation test welding device. Background Art
[0002] In the narrow gap butt welding process of large turbine welded rotors or thick-walled pipes, in order to ensure root penetration, the size of the root blunt edge is usually small, specifically 2-5mm. At the same time, in order to ensure the quality of the weld root, the welding specification with lower heat input is usually adopted for the first few layers of welding. The welding process plan within a certain depth of the weld groove root and the selection of welding materials need to be determined through multiple welding tests. For some special turbine rotors, the opening is often small, and simulated welding tests are also required to confirm the accessibility of the welding equipment and whether there is interference.
[0003] Usually, such tests use thick-walled annular test pieces or thick-walled pipes with the same size as the actual components for welding to simulate the same narrow gap welding environment as the actual components. However, welding tests often only require the welding of the first few layers of welds without filling the entire narrow gap groove. The unused narrow gap groove means more parent material cost and processing cost are wasted. Utility Model Content
[0004] In order to solve the above technical problems, the utility model provides a narrow gap groove simulation test welding device which helps to reduce waste and groove processing difficulty and reduce costs.
[0005] The utility model adopts the following technical solutions:
[0006] The utility model provides a narrow gap groove simulation test welding device, comprising a welding pipe fitting, a sealing cover plate, a sealing bottom plate and an annular flat plate section, a plurality of welding groove grooves and a plurality of wing plate assembly grooves are circumferentially spaced apart on the outer circumference of the welding pipe fitting, the sealing cover plate is sealed and fixed at the top opening of the welding pipe fitting, the sealing bottom plate is sealed and fixed at the bottom opening of the welding pipe fitting, the inner circle arc edges of the plurality of annular flat plate sections are respectively surrounded and fixed in a wing plate assembly groove, the welding groove groove is located in the interval space between the two annular flat plate sections, and the one welding groove groove and the two annular flat plate sections on both sides together constitute a narrow gap welding groove.
[0007] Preferably, the inner hole diameter d=D0 and the wall thickness t≥t0+t1 of the welded pipe fitting, and the bottom wall thickness t2=t0 of the welding groove, wherein D0 is the inner hole diameter of the welding test piece, t0 is the blunt edge depth of the welding test piece, and t1 is the total depth of the test weld of the welding test piece.
[0008] Preferably, the inner hole diameter of the welded pipe is d, the diameter of the sealing bottom plate is d2, the diameter of the sealing cover plate is d3, d2≥d+10, d3≥d+10, and the thickness of the sealing bottom plate and the sealing cover plate are both 2-5 mm.
[0009] Preferably, the inner ring diameter d4≤d+t, the width W≥(D1-(d+t)) / 2, and the plate thickness of the annular flat plate section are 2-5 mm, wherein d is the inner hole diameter of the welded pipe fitting, t is the wall thickness of the welded pipe fitting, and D1 is the outer ring diameter of the welded test piece.
[0010] Preferably, the spacing distance between the two annular flat plate segments is H1≥H, wherein H is the width of the narrow gap welding groove on the welding test piece.
[0011] Preferably, the material of the welded pipe is the same as that of the welded test piece.
[0012] Preferably, the sealing bottom plate, the sealing cover plate and the annular flat plate segment are all made of carbon steel plates, stainless steel plates or aluminum plates.
[0013] Preferably, the sealing bottom plate and the sealing cover plate are fixed by spot welding, and the opening of the welded pipe fitting is sealed by fillet welding or adhesive tape.
[0014] Preferably, the annular flat plate segment and the welded pipe fitting are connected and fixed by spot welding, fillet welding or support plate welding.
[0015] Compared with the prior art, the beneficial effects of the utility model are:
[0016] The narrow gap groove simulation test welding device of the utility model forms a narrow gap welding groove through the annular flat plate section and the welding groove groove on the welding pipe fitting. The processing difficulty of the welding groove groove and the wing plate assembly groove is obviously lower than that of processing a narrow gap welding groove on a thick-walled annular test piece or a thick-walled pipe, thereby greatly reducing the groove processing difficulty. At the same time, when the test weld does not exceed the depth of the welding groove groove, the parts other than the welding pipe fitting can be reused after dismantling, reducing material waste and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic cross-sectional view of a narrow gap groove simulation test welding device in an embodiment of the utility model.
[0018] Figure 2 This is a diagram of a narrow gap welding groove structure on a welding test piece in the prior art.
[0019] Figure 3 It is a structural diagram of a narrow gap welding groove on a narrow gap groove simulation test welding device in an embodiment of the utility model.
[0020] The reference numerals are described as follows:
[0021] 1. Welding pipe fittings
[0022] 11. Welding groove
[0023] 12. Wing plate assembly slot
[0024] 2. Sealing cover
[0025] 3. Sealing bottom plate
[0026] 4. Annular flat plate segment
[0027] 5. Narrow gap welding groove
[0028] 6. Welding test pieces
[0029] 61. Blunt edge DETAILED DESCRIPTION
[0030] The following is a further detailed description of the specific implementations of the present invention in conjunction with the accompanying drawings. These implementations are only used to illustrate the present invention, but not to limit the present invention.
[0031] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0033] In addition, in the description of the present invention, unless otherwise specified, “plurality” means two or more.
[0034] See also Figure 1The present embodiment provides a narrow gap groove simulation test welding device, comprising a welding pipe 1, a sealing cover plate 2, a sealing bottom plate 3 and an annular flat plate segment 4. A plurality of welding groove grooves 11 and a plurality of wing plate assembly grooves 12 are circumferentially spaced apart on the outer circumference of the welding pipe 1. The sealing cover plate 2 is sealed and fixed at the top opening of the welding pipe 1, and the sealing bottom plate 3 is sealed and fixed at the bottom opening of the welding pipe 1. The inner arc edges of the plurality of annular flat plate segments 4 are respectively fixed in a wing plate assembly groove 12. The welding groove groove 11 is located in the interval space between the two annular flat plate segments 4, and a welding groove groove 11 and the two annular flat plate segments 4 on both sides together constitute a narrow gap welding groove 5.
[0035] The narrow gap groove simulation test welding device of this embodiment forms a narrow gap welding groove 5 through the annular flat plate section 4 and the welding groove groove 11 on the welding pipe fitting 1. The processing difficulty of the welding groove groove 11 and the wing plate assembly groove 12 is obviously lower than the processing difficulty of processing the narrow gap welding groove 5 on the thick-walled annular test piece or thick-walled pipe, thereby greatly reducing the groove processing difficulty. At the same time, when the test weld does not exceed the depth of the welding groove groove 11, the parts other than the welding pipe fitting 1 can be reused after dismantling, reducing material waste and reducing costs.
[0036] It should be noted that the number of the welding groove groove 11 and the flange assembly groove 12 depends on the test requirements. For example, in this embodiment, see Figure 1 There are three welding groove grooves 11 and four wing plate assembly grooves 12 .
[0037] Preferably, see Figure 2 and Figure 3 , the inner hole diameter d=D0, the wall thickness t≥t0+t1 of the welded pipe fitting 1, and the bottom wall thickness t2=t0 of the welding groove groove 11, wherein D0 is the inner hole diameter of the welding test piece 6, t0 is the blunt edge depth of the welding test piece 6, and t1 is the total depth of the test weld of the welding test piece 6. Therefore, the narrow gap groove simulation test welding device in this embodiment can more accurately simulate the blunt edge 61 on the conventional welding test piece 6 through the welding groove groove 11, and ensure that the test weld does not exceed the depth of the welding groove groove 11 by making the wall thickness t≥t0+t1 of the welded pipe fitting 1, thereby ensuring that the parts other than the welded pipe fitting 1 can be reused after dismantling, so as to reduce material waste and reduce costs.
[0038] Preferably, see Figure 2 and Figure 3The inner hole diameter of the welding pipe fitting 1 is d, the diameter of the sealing bottom plate 3 is d2, the diameter of the sealing cover plate 2 is d3, d2≥d+10, d3≥d+10, so that the sealing bottom plate 3, the sealing cover plate 2 and the welding pipe fitting 1 can form a closed chamber for the filling of protective gas, and the thickness of the sealing bottom plate 3 and the sealing cover plate 2 are both 2-5mm, so as to ensure the structural strength of the sealing bottom plate 3 and the sealing cover plate 2 themselves.
[0039] Preferably, see Figure 2 and Figure 3 , the inner diameter d4≤d+t, the width W≥(D1-(d+t)) / 2, and the plate thickness are 2-5mm, where d is the inner diameter of the welded pipe fitting 1, t is the wall thickness of the welded pipe fitting 1, and D1 is the outer diameter of the welded test piece 6. As a result, the narrow gap weld groove 5 formed by the annular flat plate section 4 and the weld groove groove 11 is close to the narrow gap weld groove 5 on the welded test piece 6 in size and strength, thereby obtaining more accurate welding test data for determining a more reasonable welding process plan and a more suitable welding material.
[0040] Preferably, see Figure 2 and Figure 3 , the spacing distance H1 of the two annular flat plate sections 4 is ≥ H, where H is the width of the narrow gap welding groove 5 on the welding test piece 6. Therefore, the narrow gap groove simulation test welding device of this embodiment has two welding test schemes, namely, the equal gap scheme and the simple scheme. When the equal gap scheme is adopted, H1=H, and when the simple scheme is adopted, H1>H. When the test allows to greatly reduce the difficulty of processing the groove, the simple scheme can be adopted to shorten the test cycle and save time cost.
[0041] Preferably, the material of the welded pipe 1 is the same as that of the welding test piece 6 , so that the welding test result of the narrow gap groove simulation test welding device of this embodiment is closer to the welding test result of the welding test piece 6 .
[0042] Preferably, in this embodiment, the welded pipe fitting 1 is a conventional finished pipe.
[0043] It should be noted that, since the thickness of the welded pipe fitting 1 is much smaller than the thickness of the welded test piece 6 , in order to ensure the roundness and structural rigidity of the welded pipe fitting 1 , a fixed support structure may be welded inside the welded pipe fitting 1 when necessary.
[0044] Preferably, the sealing bottom plate 3, the sealing cover plate 2 and the annular flat plate segment 4 are all made of carbon steel plates, stainless steel plates or aluminum plates.
[0045] Preferably, the sealing bottom plate 3 and the sealing cover plate 2 are fixed by spot welding, and the opening of the welded pipe fitting 1 is sealed by fillet welding or adhesive tape.
[0046] Preferably, the annular flat plate segment 4 and the welded pipe fitting 1 are connected and fixed by spot welding, fillet welding or support plate welding.
[0047] It should be noted that after completing the welding test using the narrow gap groove simulation test welding device of this embodiment, the parts other than the welded pipe fitting 1 are recycled and reused by releasing the connection between the sealing bottom plate 3, the sealing cover plate 2 and the annular flat plate section 4 and the welded pipe fitting 1.
[0048] Compared with the structure of the welding test piece 6 (i.e., the traditional annular test piece or thick-walled pipe test piece), the narrow gap groove simulation test welding device of this embodiment can be processed by purchasing finished pipes and plates, without the need to order thick-walled pipes or forgings of corresponding sizes according to the actual component sizes, and the parent material procurement cost and procurement cycle are greatly reduced. At the same time, the processing amount of the welding groove on the narrow gap groove simulation test welding device of this embodiment is relatively reduced, and the groove processing difficulty is reduced, so the processing cycle is greatly shortened, and all parts except the welding pipe 1 can be reused, which reduces the cost and cycle of the traditional narrow gap groove welding test from many aspects.
[0049] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.
Claims
1. A narrow gap groove simulation test welding device, characterized in that: The invention comprises a welding pipe fitting (1), a sealing cover plate (2), a sealing bottom plate (3) and an annular flat plate segment (4); the outer circumference of the welding pipe fitting (1) is provided with a plurality of welding grooves (11) and a plurality of wing plate assembly grooves (12) spaced apart in an annular direction; the sealing cover plate (2) is sealed and fixed at the top opening of the welding pipe fitting (1); the sealing bottom plate (3) is sealed and fixed at the bottom opening of the welding pipe fitting (1); the inner arc edges of the plurality of annular flat plate segments (4) are respectively fixed around one of the wing plate assembly grooves (12); the welding groove (11) is located in the interval space between two annular flat plate segments (4); and one welding groove (11) and the two annular flat plate segments (4) on both sides together form a narrow gap welding groove (5).
2. The narrow gap groove simulation test welding device according to claim 1 is characterized in that: The inner hole diameter d=D0 and the wall thickness t≥t0+t1 of the welded pipe fitting (1), the bottom wall thickness t2=t0 of the weld groove groove (11), wherein D0 is the inner hole diameter of the welded test piece (6), t0 is the blunt edge depth of the welded test piece (6), and t1 is the total depth of the test weld of the welded test piece (6).
3. The narrow gap groove simulation test welding device according to claim 1 is characterized in that: The inner hole diameter of the welded pipe fitting (1) is d, the diameter of the sealing bottom plate (3) is d2, the diameter of the sealing cover plate (2) is d3, d2≥d+10, d3≥d+10, and the thickness of the sealing bottom plate (3) and the sealing cover plate (2) are both 2-5 mm.
4. The narrow gap groove simulation test welding device according to claim 1 is characterized in that: The inner ring diameter d4≤d+t, the width W≥(D1-(d+t)) / 2, and the plate thickness of the annular flat plate section (4) are 2-5 mm, wherein d is the inner hole diameter of the welded pipe fitting (1), t is the wall thickness of the welded pipe fitting (1), and D1 is the outer ring diameter of the welded test piece (6).
5. The narrow gap groove simulation test welding device according to claim 1, characterized in that: The spacing distance H1 between the two annular flat plate segments (4) is ≥H, wherein H is the width of the narrow gap welding groove (5) on the welding test piece (6).
6. The narrow gap groove simulation test welding device according to claim 1, characterized in that: The material of the welded pipe fitting (1) is the same as the material of the welded test piece (6).
7. The narrow gap groove simulation test welding device according to claim 1 is characterized in that: The sealing bottom plate (3), the sealing cover plate (2) and the annular flat plate section (4) are all made of carbon steel plates, stainless steel plates or aluminum plates.
8. The narrow gap groove simulation test welding device according to claim 1, characterized in that: The sealing bottom plate (3) and the sealing cover plate (2) are both fixed by spot welding, and the opening of the welded pipe fitting (1) is sealed by corner welding or adhesive tape.
9. The narrow gap groove simulation test welding device according to claim 1, characterized in that: The annular flat plate section (4) and the welded pipe fitting (1) are connected and fixed by spot welding, fillet welding or support plate welding.