Welding tool for gas turbine flame tube assembly welding

Abstract

The utility model relates to a welding tool, in particular to a welding tool for gas turbine flame tube assembly welding. The utility model aims to solve the problem that the use performance of a flame tube is affected due to the fact that the flame tube is not concentric after being installed and welded in the prior art. The flame tube welding fixture is simple in structure and convenient to operate, the supporting base, the first supporting unit, the second supporting unit and the top cover play a role in positioning and shaping all components of a flame tube, the concentricity of the flame tube is guaranteed, stress in the welding process is effectively counteracted, and welding deformation in the welding process is reduced; the inner circumferential face of the flame tube, the top cover and the supporting base form a cavity, argon is filled into the cavity, the effect of protecting a welding seam is achieved in the welding process, the overall manufacturing precision of the flame tube is further guaranteed, and the use performance of the flame tube is guaranteed. The utility model belongs to the technical field of flame tube welding.

Description

Technical Field

[0001] The utility model relates to a welding tool, in particular to a welding tool for assembling and welding a flame tube of a combustion engine, and belongs to the technical field of flame tube welding. Background Art

[0002] As an important part of the combustion chamber of a heavy-duty gas turbine, the quality of its manufacturing directly determines its performance. At present, most components of the flame tube are formed by sheet rolling, and then the components are welded together after forming.

[0003] However, in actual production, there are certain deviations in the manufacturing accuracy of each component. After several components are welded together, the manufacturing deviations and welding deformation may cause the components to be out of center, which will cause difficulties in subsequent processing procedures and flame tube assembly, and also affect the performance of the flame tube.

[0004] In summary, how to propose a welding tool to address the above technical issues has become an urgent problem to be solved by technicians in this field. Utility Model Content

[0005] Aiming at the above-mentioned deficiencies of the prior art, the utility model provides a welding tool for assembling and welding a flame tube of a combustion engine.

[0006] The technical scheme of the utility model is: a welding tool for welding a combustion engine flame tube, comprising a flame tube, which is formed by coaxially welding a first straight tube, a conical tube and a second straight tube in sequence, and also comprises a supporting base, a column, a top cover and a plurality of cushion blocks.

[0007] The support base and the top cover are both provided with bosses, the diameter of the boss on the support base is the same as the inner diameter of the second straight cylinder, and the diameter of the boss on the top cover is the same as the inner diameter of the first straight cylinder.

[0008] The column is a stepped shaft structure, and the column is coaxially fixed to the support base; the first support unit, the first conical expansion sleeve, the first nut, the second support unit, the second conical expansion sleeve, the second nut, the support ring and the third nut are installed on the column in sequence.

[0009] The first supporting unit includes a first annular plate, a second annular plate and a plurality of first ring sector expansion blocks.

[0010] The pad is arranged between the first annular plate and the support base, and the first annular plate and the second annular plate are connected by bolts. A plurality of first annular sector-shaped expansion blocks are arranged between the first annular plate and the second annular plate at equal angles, and a first profile and a first cylindrical surface are arranged on the outer circumferential surface of the first annular sector-shaped expansion block, the first profile is the same as the profile of the inner surface of the cone cylinder, and the outer diameter of the first cylindrical surface is the same as the inner diameter of the second straight cylinder.

[0011] One end of the first conical expansion sleeve is matched with the inner circumferential surface of the first annular sector-shaped expansion block through a conical surface, and the other end of the first conical expansion sleeve is abutted against the first nut.

[0012] The second supporting unit includes a third annular plate, a fourth annular plate and a plurality of second ring sector expansion blocks.

[0013] The third annular plate and the fourth annular plate are connected by bolts, and a plurality of second ring sector expansion blocks are arranged at equal angles between the third annular plate and the fourth annular plate.

[0014] The outer circumferential surface of the second annular sector-shaped expansion block is provided with a second profile and a second cylindrical surface. The second profile is the same as the profile of the inner surface of the cone cylinder, and the outer diameter of the second cylindrical surface is the same as the inner diameter of the first straight cylinder.

[0015] One end of the second conical expansion sleeve is matched with the inner circumferential surface of the second annular sector-shaped expansion block through a conical surface, and the other end of the second conical expansion sleeve is abutted against the second nut.

[0016] The top cover is sleeved on the second conical expansion sleeve, and the two end surfaces of the support ring are respectively against the top cover and the third nut.

[0017] Furthermore, it also includes a first flow ring, and an annular groove is opened on the outer circumferential surface of each first ring sector expansion block, and the first flow ring is embedded in the annular groove.

[0018] Furthermore, it also includes a second flow ring, and an annular groove is formed on the outer circumferential surface of each second ring sector expansion block, and the second flow ring is embedded in the annular groove.

[0019] Furthermore, a plurality of jet holes are opened at equal angles on the outer circumferential surfaces of the first flow ring and the second flow ring, and gas delivery holes are opened on the first ring sector-shaped expansion block and the second ring sector-shaped expansion block, and the gas delivery holes are connected to the jet holes; through holes for the gas delivery pipeline to pass through are opened on the first annular plate, the support base, the fourth annular plate and the top cover.

[0020] Furthermore, it also includes an adjusting gasket, and both end surfaces of the adjusting gasket are respectively against the shoulders on the third annular plate and the column.

[0021] Compared with the prior art, the utility model has the following effects:

[0022] 1. The utility model has a simple structure and is easy to operate. The support base 21, the first support unit, the second support unit and the top cover 1 play a role in positioning and correcting the various components of the flame tube, ensuring the concentricity of the flame tube, effectively offsetting the stress during welding, and reducing welding deformation during welding; the inner circumferential surface of the flame tube, the top cover 1 and the support base 21 form a cavity, and argon gas is filled into the cavity, which plays a role in protecting the weld during welding, further ensuring the overall manufacturing accuracy of the flame tube, and ensuring the performance of the flame tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the flame tube of the utility model;

[0024] Figure 2 It is a cross-sectional view of the utility model;

[0025] Figure 3 is a top view of the second support unit;

[0026] Figure 4 is a top view of the first support unit;

[0027] Figure 5 yes Figure 2 A partial enlarged view of point Ⅰ in the middle;

[0028] Figure 6 yes Figure 2 A partial enlarged view of the middle II;

[0029] Figure 7 It is a cross-sectional view of the second ring sector expansion block 10 of the utility model;

[0030] Figure 8 It is a cross-sectional view of the first ring sector expansion block 18 of the utility model.

[0031] In the figure: 1, top cover; 2, support ring; 4, third nut; 5, second nut; 7, second conical expansion sleeve; 8, fourth annular plate; 9, second flow ring; 10, second ring fan-shaped expansion block; 10-1, second profile; 10-2, second cylindrical surface; 11, third annular plate; 12, adjustment gasket; 13, first nut; 15, first conical expansion sleeve; 16, second annular plate; 17, first flow ring; 18, first ring fan-shaped expansion block; 18-1, first profile; 18-2, first cylindrical surface; 19, first annular plate; 20, gasket; 21, supporting bottom plate; 22, column; 101, first straight cylinder; 102, conical cylinder; 103, second straight cylinder. DETAILED DESCRIPTION

[0032] In order to make the utility model objectives, features and advantages of the utility model more obvious and easy to understand, the technical solutions in the implementation modes of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation modes of the utility model.

[0033] Specific implementation method 1: Combination Figures 1 to 8 To illustrate this embodiment, a welding tool for assembling and welding a flame tube of a gas turbine in this embodiment includes a flame tube, which is formed by coaxially welding a first straight tube 101, a conical tube 102 and a second straight tube 103 in sequence; it also includes a support base 21, a column 22, a top cover 1 and a plurality of pads 20.

[0034] Both the support base 21 and the top cover 1 are provided with bosses. The diameter of the boss on the support base 21 is the same as the inner diameter of the second straight cylinder 103 , and the diameter of the boss on the top cover 1 is the same as the inner diameter of the first straight cylinder 101 .

[0035] The column 22 is a stepped shaft structure, and the column 22 is coaxially fixed to the support base 21; the first support unit, the first conical expansion sleeve 15, the first nut 13, the second support unit, the second conical expansion sleeve 7, the second nut 5, the support ring 2 and the third nut 4 are installed on the column 22 in sequence.

[0036] The first supporting unit includes a first annular plate 19 , a second annular plate 16 and a plurality of first ring sector-shaped expansion blocks 18 .

[0037] The pad 20 is arranged between the first annular plate 19 and the support base 21 to provide support for the second support unit and to provide protection for the welding operation of the cone cylinder 102 and the second straight cylinder 103; the first annular plate 19 and the second annular plate 16 are connected by bolts. A plurality of first ring sector expansion blocks 18 are arranged at equal angles between the first annular plate 19 and the second annular plate 16. The outer circumferential surface of the first ring sector expansion block 18 is provided with a first profile 18-1 and a first cylindrical surface 18-2. The first profile 18-1 is the same as the profile of the inner surface of the cone cylinder 102, and the outer diameter of the first cylindrical surface 18-2 is the same as the inner diameter of the second straight cylinder 103.

[0038] One end of the first conical expansion sleeve 15 is matched with the inner circumferential surface of the first annular sector-shaped expansion block 18 through a conical surface, and the other end of the first conical expansion sleeve 15 is abutted against the first nut 13. In this way, when the first nut 13 is screwed, the first annular sector-shaped expansion block 18 can move closer to or farther away from the axial direction of the first conical expansion sleeve 15.

[0039] The second supporting unit includes a third annular plate 11 , a fourth annular plate 8 and a plurality of second ring sector-shaped expansion blocks 10 .

[0040] The third annular plate 11 and the fourth annular plate 8 are connected by bolts, and a plurality of second ring sector expansion blocks 10 are arranged at equal angles between the third annular plate 11 and the fourth annular plate 8 .

[0041] The second circular sector expansion block 10 is provided with a second profile 10 - 1 and a second cylindrical surface 10 - 2 on its outer circumferential surface. The second profile 10 - 1 is the same as the profile of the inner surface of the cone 102 . The outer diameter of the second cylindrical surface 10 - 2 is the same as the inner diameter of the first straight cylinder 101 .

[0042] One end of the second conical expansion sleeve 7 is matched with the inner circumferential surface of the second annular sector-shaped expansion block 10 through a conical surface, and the other end of the second conical expansion sleeve 7 is abutted against the second nut 5. In this way, when the second nut 5 is screwed, the second annular sector-shaped expansion block 10 can move closer to or farther away from the axial direction of the second conical expansion sleeve 7.

[0043] The top cover 1 is sleeved on the second conical expansion sleeve 7 , and the two end surfaces of the support ring 2 are respectively against the top cover 1 and the third nut 4 , and the inner diameter of the support ring 2 is larger than the outer diameter of the second conical expansion sleeve 7 .

[0044] Specific implementation method 2: Combination Figure 2 , Figure 5 and Figure 6 To explain this embodiment, this embodiment further includes a first flow ring 17 . An annular groove is formed on the outer circumferential surface of each first ring sector-shaped expansion block 18 . The first flow ring 17 is embedded in the annular groove of the first ring sector-shaped expansion block 18 .

[0045] Furthermore, it also includes a second flow ring 9 , and an annular groove is formed on the outer circumferential surface of each second ring sector-shaped expansion block 10 , and the second flow ring 9 is embedded in the annular groove of the second ring sector-shaped expansion block 10 .

[0046] Other components and connection relationships are the same as those in the first specific implementation method.

[0047] Specific implementation method three: Combination Figures 2 to 6 To explain this embodiment, in this embodiment, a plurality of gas injection holes are opened at equal angles on the outer circumferential surfaces of the first flow ring 17 and the second flow ring 9, and gas supply holes are opened on the first ring sector-shaped expansion block 18 and the second ring sector-shaped expansion block 10, and the gas supply holes are connected with the gas injection holes; the first annular plate 19, the support base 21, the fourth annular plate 8 and the top cover 1 are opened with through holes for the gas supply pipeline to pass through. During the welding process, the inner surface of the flame tube needs to be filled with argon gas for protection, wherein one group of gas supply pipelines pass through the support base 21 and the first annular plate 19 in sequence and are connected with the gas supply holes and the gas injection holes, providing argon protection for the weld between the cone 102 and the second straight cylinder 103; another group of gas supply pipelines pass through the top cover 1 and the fourth annular plate 8 in sequence and are connected with the gas supply holes and the gas injection holes, providing argon protection for the weld between the first straight cylinder 101 and the cone 102. Since the top cover 1 and the support base 21 are installed at both ends of the flame tube, the inner circumference of the flame tube, the top cover 1 and the support base 21 form a cavity. As argon gas is continuously filled in, the argon gas fills the entire cavity, playing a role in protecting and assisting the weld during the welding process.

[0048] The other components and connection relationships are the same as those in the first or second specific implementation.

[0049] Specific implementation method four: Combination Figure 2This embodiment further includes an adjustment gasket 12, and both end surfaces of the adjustment gasket 12 are respectively against the shaft shoulders on the third annular plate 11 and the column 22. This arrangement is conducive to adjusting the height of the second support unit and providing protection for the welding operation of the first straight cylinder 101 and the conical cylinder 102. Other components and connection relationships are the same as those of the first, second or third embodiments.

[0050] Specific implementation method five: Combination Figure 2 , Figure 3 and Figure 4 To illustrate this embodiment, the number of the cushion block 20, the first ring sector-shaped expansion block 18 and the second ring sector-shaped expansion block 10 in this embodiment are all 4. Other components and connection relationships are the same as those in the first, second, third or fourth embodiment.

[0051] How it works

[0052] Combination Figures 1 to 8 Explain the working principle of the utility model:

[0053] The support base 21, the column 22, the first support unit, the second support unit and the top cover 1 are arranged on the same axis. When the flame tube is welded, the following steps are followed:

[0054] Step 1: First, coaxially install the second straight cylinder 103 on the support base 21, then install the first support unit, the first conical expansion sleeve 15 and the first nut 13 on the column 22, then arrange the conical cylinder 102 and the second straight cylinder 103 coaxially, and finally tighten the first nut 13. The first annular fan-shaped expansion block 18 can be away from the axial direction of the first conical expansion sleeve 15, so that the support base 21 and the first support unit play a role in positioning and calibrating the second straight cylinder 103 and the conical cylinder 102.

[0055] Step 2: First, install the second support unit, the second conical expansion sleeve 7 and the second nut 5 on the column 22, and then arrange the first straight cylinder 101 and the conical cylinder 102 coaxially, and then tighten the second nut 5. The second annular fan-shaped expansion block 10 can be away from the axial direction of the second conical expansion sleeve 7, so that the top cover 1 and the second support unit can position and align the first straight cylinder 101 and the conical cylinder 102, and finally tighten the third nut 4; thereby completing the positioning of the flame cylinder before anti-welding, ensuring the concentricity of the first straight cylinder 101, the conical cylinder 102 and the second straight cylinder 103, and at the same time reducing the welding deformation during welding by supporting the base 21, the first support unit, the second support unit and the top cover 1.

[0056] Step 3: The inner circumference of the flame tube, the top cover 1 and the support base 21 form a cavity, and argon gas is filled into the cavity to protect the weld during the welding process and further ensure the overall manufacturing accuracy of the flame tube.

[0057] The present invention has been disclosed as above in the form of a preferred embodiment, but it is not intended to limit the present invention. Any simple modification, equivalent changes and modifications made to the above implementation cases by any professional and technical personnel who do not deviate from the content of the technical solution of the present invention and based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A welding tool for welding a flame tube of a combustion engine, comprising a flame tube, wherein the flame tube is formed by coaxially welding a first straight tube (101), a tapered tube (102) and a second straight tube (103) in sequence, and characterized in that: It also includes a supporting base (21), a column (22), a top cover (1) and a plurality of cushion blocks (20); The support base (21) and the top cover (1) are both provided with bosses, the diameter of the bosses on the support base (21) is the same as the inner diameter of the second straight cylinder (103), and the diameter of the bosses on the top cover (1) is the same as the inner diameter of the first straight cylinder (101); The column (22) is a stepped shaft structure, and the column (22) is coaxially fixed to the support base (21); a first support unit, a first conical expansion sleeve (15), a first nut (13), a second support unit, a second conical expansion sleeve (7), a second nut (5), a support ring (2) and a third nut (4) are sequentially mounted on the column (22); The first supporting unit comprises a first annular plate (19), a second annular plate (16) and a plurality of first ring sector expansion blocks (18); The cushion block (20) is arranged between the first annular plate (19) and the supporting base (21), and the first annular plate (19) and the second annular plate (16) are connected by bolts; a plurality of first annular sector-shaped expansion blocks (18) are arranged at equal angles between the first annular plate (19) and the second annular plate (16), and a first profile (18-1) and a first cylindrical surface (18-2) are provided on the outer circumferential surface of the first annular sector-shaped expansion block (18), the first profile (18-1) is the same as the profile of the inner surface of the conical cylinder (102), and the outer diameter of the first cylindrical surface (18-2) is the same as the inner diameter of the second straight cylinder (103); One end of the first conical expansion sleeve (15) is matched with the inner circumferential surface of the first annular sector expansion block (18) through a conical surface, and the other end of the first conical expansion sleeve (15) is abutted against the first nut (13); The second supporting unit comprises a third annular plate (11), a fourth annular plate (8) and a plurality of second ring sector expansion blocks (10); The third annular plate (11) and the fourth annular plate (8) are connected by bolts, and a plurality of second ring sector expansion blocks (10) are arranged at equal angles between the third annular plate (11) and the fourth annular plate (8); A second profile (10-1) and a second cylindrical surface (10-2) are provided on the outer circumferential surface of the second annular sector expansion block (10); the second profile (10-1) is the same as the profile of the inner surface of the conical cylinder (102); and the outer diameter of the second cylindrical surface (10-2) is the same as the inner diameter of the first straight cylinder (101); One end of the second conical expansion sleeve (7) is matched with the inner circumferential surface of the second annular sector expansion block (10) through a conical surface, and the other end of the second conical expansion sleeve (7) is abutted against the second nut (5); The top cover (1) is sleeved on the second conical expansion sleeve (7), and the two end surfaces of the support ring (2) are respectively against the top cover (1) and the third nut (4).

2. A welding tool for assembly welding of a combustion engine flame tube according to claim 1, characterized in that: It also includes a first flow ring (17), an annular groove is formed on the outer circumferential surface of each first ring sector expansion block (18), and the first flow ring (17) is embedded in the annular groove.

3. A welding tool for assembly welding of a combustion engine flame tube according to claim 2, characterized in that: It also includes a second flow ring (9), and an annular groove is formed on the outer circumferential surface of each second ring sector expansion block (10), and the second flow ring (9) is embedded in the annular groove.

4. A welding tool for assembly welding of a combustion engine flame tube according to claim 3, characterized in that: A plurality of air injection holes are formed at equal angles on the outer circumferential surfaces of the first flow ring (17) and the second flow ring (9); air delivery holes are formed on the first ring sector-shaped expansion block (18) and the second ring sector-shaped expansion block (10); and the air delivery holes are connected to the air injection holes; and through holes for the air delivery pipeline to pass through are formed on the first annular plate (19), the support base (21), the fourth annular plate (8) and the top cover (1).

5. The welding tool for assembly welding of combustion engine flame tube according to claim 4, characterized in that: It also comprises an adjusting gasket (12), the two end surfaces of which respectively abut against the shaft shoulders on the third annular plate (11) and the column (22).

6. The welding tool for assembly welding of a combustion engine flame tube according to claim 5, characterized in that: The number of the cushion block (20), the first ring-shaped fan-shaped expansion block (18) and the second ring-shaped fan-shaped expansion block (10) are all four.

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