Combustion gas turbine flame tube assembling and welding tool

Abstract

The invention relates to the technical field of flame tube machining, and discloses a gas turbine flame tube assembling and welding tool which comprises a base, a roller supporting table is installed in the middle of the upper end of the base, and an upper flame tube and a lower flame tube are movably arranged on the left side and the right side of the upper end of the roller supporting table correspondingly; a sleeve is slidably inserted into the right end of the first shaft seat, and an elastic core tube is slidably inserted into the left side of the sleeve. The left end of the upper flame tube is clamped and extruded through the positioning disc, and the tail of the lower flame tube is locked in cooperation with the positioning assembly, so that the overall axial length of the flame tube is limited, meanwhile, the radial position of the two parts of the flame tube during butt joint is guaranteed, and the welding seam area of the flame tube is internally reinforced and limited in cooperation with the inner supporting assembly; therefore, the assembly precision is improved, radial run-out overproof in the subsequent spin welding process is avoided, in addition, through integrated control, rapid assembly and disassembly are convenient to achieve, and the assembly welding efficiency of the flame tube is improved.

Description

Technical Field

[0001] This invention relates to the field of flame tube processing technology, and more specifically to a welding fixture for assembling a gas turbine flame tube. Background Technology

[0002] Gas turbines, as power devices that convert heat into work, have advantages such as high specific power, rapid start-up and load changes, and the ability to burn a variety of fuels. The combustion chamber, one of the three major components of a gas turbine, is known as the "heart" of the engine and is located between the compressor and the turbine. It is used to convert the chemical energy in the fuel into heat energy, heating the high-pressure air discharged from the compressor to the allowable temperature before the turbine. The flame tube, as the core component of the combustion chamber, also provides the space for fuel combustion. Although the flame tube is a thin-walled component, the assembly requirements are very high; therefore, the assembly of the flame tube requires specialized tooling.

[0003] Utility model CN209954070U discloses a welding fixture for assembling the combustion chamber flame tube of a gas turbine. A central column is vertically mounted on a base and has multiple axial through holes, the distance between adjacent axial through holes being the height of a single cone. A lower tray is fitted onto the central column and has multiple inner pressure hooks; an upper tray is fitted onto the central column and has multiple outer pressure hooks. This utility model can quickly support and fix the cone, ensuring that the upper and lower cones are coaxially fitted, facilitating welding.

[0004] In the aforementioned patent, the gas turbine combustor flame tube assembly and welding fixture is used such that the bottom and top cones are fixed by multiple circumferentially arranged hooks. The hooks are also controlled by multiple circumferentially arranged fixing bolts to press against the cones. Since multiple fixing bolts need to be controlled to press against the hooks, if one or more fixing bolts are not tightened properly, the hooks will not be properly pressed, which can easily lead to misalignment of the cones and welding position deviation, thus reducing assembly accuracy. The need to operate multiple fixing bolts also results in cumbersome operation and low loading and unloading efficiency. Summary of the Invention

[0005] The purpose of this invention is to address the problems of low assembly accuracy and low loading and unloading efficiency in the use of conventional gas turbine flame tube assembly and welding fixtures. This invention provides a gas turbine flame tube assembly and welding fixture.

[0006] To achieve the above objectives, the present invention specifically adopts the following technical solution: A welding fixture for assembling a gas turbine flame tube includes a base. A roller support is installed at the middle of the upper end of the base. An upper flame tube and a lower flame tube are movably arranged on the left and right sides of the upper end of the roller support, respectively. A shaft seat is installed on the left side of the upper end of the base. A sleeve is slidably inserted into the right end of the shaft seat. A spring core tube is slidably inserted into the left side of the sleeve. An adjusting screw threaded into the left side of the spring core tube is rotatably connected to the left wall of the shaft seat via a thrust bearing. A positioning disc with a conical protrusion at the middle of the right end is rotatably connected to the right end of the sleeve. A limiting component for locking the sleeve is provided on the inner wall of the shaft seat. An inner support component for limiting the weld seam of the flame tube is provided on the right side of the positioning disc. A second bearing seat is installed on the upper right side of the base. A rotating handle is rotatably connected to the right wall of the second bearing seat. An eccentric disk is fixedly connected to the left end of the rotating handle. The left wall of the eccentric disk has a positioning groove that matches the tail of the lower flame tube. A positioning component for locking the lower flame tube is provided in the positioning groove.

[0007] Furthermore, the positioning disk, the upper flame tube, the lower flame tube, and the rotating handle are coaxial, and the inner diameter of the upper flame tube gradually decreases from left to right after the upper flame tube and the lower flame tube are combined.

[0008] Furthermore, three sets of rollers are rotatably connected to the upper end of the roller support, with each set of rollers arranged symmetrically in front and behind, and the radius of the three sets of rollers gradually increasing from left to right.

[0009] Furthermore, the limiting component includes a hydraulic oil cavity formed on the inner wall of the bearing seat around the periphery of the sleeve, a piston fixedly connected to the outer wall of the sleeve and slidably connected to the inner wall of the hydraulic oil cavity, a plurality of solenoid valves arranged on the circumference of the piston, and a pressure sensor electrically connected to the solenoid valves installed on the right edge of the positioning plate.

[0010] Furthermore, the inner support assembly includes an adjusting tube rotatably connected to the inner wall of the sleeve. The adjusting tube has circumferentially arranged arc grooves on both its upper and lower walls. The inner wall of the elastic core tube has a pin that movably engages with the arc groove. A carrier tube is slidably inserted into the inner wall of the adjusting tube. An adjusting disc is fixedly connected to the right end of the carrier tube. A curved groove is circumferentially arranged on the adjusting disc. A rotating shaft rotatably connected to the carrier tube and slidably engages with the adjusting tube is slidably connected to the inner wall of the carrier tube. Several circumferentially arranged telescopic columns are fixedly connected to the outer periphery of the right end of the rotating shaft. A protruding column is provided on the left wall of the telescopic section of the telescopic column, movably engaging with the curved groove. The left wall of the fixed section of the telescopic column has a sliding groove corresponding to the protruding column. Abutment wheels are rotatably connected to the left and right sides of the outer end of the telescopic section of the telescopic column, with the radius of the left abutment wheel being larger than that of the right abutment wheel. An electric lead screw is rotatably connected to the left wall of the bearing seat and threaded into the carrier pipe. The electric lead screw is driven by a motor mounted on the left wall of the bearing seat, and the motor is electrically connected to the pressure sensor.

[0011] Furthermore, a keyway is provided on the upper wall of the rotating shaft, a key protrusion is provided on the inner wall of the right side of the adjusting tube to be movably engaged with the keyway, and a movable groove corresponding to the key protrusion is provided on the front side of the carrier tube.

[0012] Furthermore, the positioning component includes a locking block rotatably connected at right angles to the upper and lower sides of the positioning groove. The upper and lower walls of the right end of the lower flame tube have mounting edges that can be engaged by the locking block. A fixed gear is fixedly connected to the middle of the locking block. A spring slide rod is slidably inserted into the rear wall of the positioning groove. The spring force of the spring slide rod is less than that of the spring force of the spring core tube. A toothed frame sleeved on the fixed gear is fixedly connected to the left wall of the spring slide rod. An adjusting ring is slidably engaged on the inner left wall of the second shaft seat. An inclined surface is provided on the inner edge of the right wall of the adjusting ring to movably abut against the spring slide rod. Two L-shaped connecting rods penetrating the roller support are fixedly connected between the adjusting ring and the sleeve.

[0013] Furthermore, the right wall of the upper toothed frame inner cavity meshes with the fixed gear, the left wall of the lower toothed frame inner cavity meshes with the fixed gear, and the middle part of the locking block has a through groove adapted to the toothed frame.

[0014] The beneficial effects of this invention are as follows: In this invention, the upper flame tube is placed on a roller support platform to connect with the lower flame tube. The tail of the lower flame tube is inserted into the positioning groove in the eccentric plate. The positioning plate clamps and presses the left end of the upper flame tube, and the positioning component locks the tail of the lower flame tube, thereby limiting the overall axial length of the flame tube and ensuring the radial position when the two parts of the flame tube are connected. In addition, the internal support component strengthens the limiting of the weld area of ​​the flame tube from the inside, thereby improving the assembly accuracy and avoiding excessive radial runout during subsequent rotational welding.

[0015] This invention, by rotating the adjusting screw, can first drive the positioning plate to press and fix the upper flame tube. Simultaneously, the positioning component is automatically driven to lock the lower flame tube. When the pressure of the positioning plate is sufficient, the limiting component automatically locks the sleeve, and the inner support component automatically extends. With continued rotation of the adjusting screw, the inner support component can be controlled to limit the weld area inside the flame tube. Through integrated control, it is easy to achieve rapid loading and unloading, and improve the assembly and welding efficiency of the flame tube. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the assembly and welding fixture of the present invention; Figure 2 This is a three-dimensional sectional view of the assembly and welding fixture base and roller support of the present invention; Figure 3 This is a three-dimensional sectional view of the assembly and welding tooling bearing seat and the elastic core tube of the present invention; Figure 4This is a three-dimensional sectional view of the assembly and welding tooling bearing seat and the adjusting tube portion of the present invention; Figure 5 This is a three-dimensional sectional view of the positioning plate portion of the assembly and welding fixture of the present invention; Figure 6 This is a three-dimensional structural diagram of the assembly and welding tooling bearing seat 2 and the eccentric disk of the present invention; Figure 7 This is a three-dimensional sectional view of the lower flame tube and eccentric disk portion of the assembly and welding fixture of the present invention; Figure 8 This is a three-dimensional sectional view of the eccentric disc and clamping block of the assembly and welding fixture of the present invention.

[0017] Reference numerals: 1. Base; 11. Roller support; 12. Roller; 2. Upper flame tube; 3. Lower flame tube; 4. Shaft seat one; 41. Sleeve; 42. Piston; 43. Solenoid valve; 44. Elastic core tube; 45. Pin; 46. Adjusting screw; 47. Positioning plate; 48. Pressure sensor; 5. Adjusting pipe; 51. Arc groove; 52. Carrier tube; 53. Electric screw; 54. Adjusting plate; 55. Bend groove; 56. Rotating shaft; 57. Telescopic column; 58. Protruding column; 59. Abutment wheel; 6. Shaft seat two; 61. Rotating handle; 62. Eccentric plate; 63. Locking block; 64. Fixed gear; 65. Elastic slide rod; 66. Gear frame; 67. Adjusting ring; 68. L-shaped connecting rod. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0019] Example 1, as Figures 1-8 As shown, a welding fixture for assembling a gas turbine flame tube includes a base 1. A roller support 11 is installed at the middle of the upper end of the base 1. An upper flame tube 2 and a lower flame tube 3 are movably arranged on the left and right sides of the upper end of the roller support 11, respectively. A bearing seat 4 is installed on the left side of the upper end of the base 1. A sleeve 41 is slidably inserted into the right end of the bearing seat 4. A spring core tube 44 is slidably inserted into the left side of the sleeve 41. An adjusting screw 46, which is threaded into the left side of the spring core tube 44, is rotatably connected to the left wall of the bearing seat 4 via a thrust bearing. A positioning disc 47, which protrudes in a conical shape at the middle of the right end, is rotatably connected to the right end of the sleeve 41. A limiting component for locking the sleeve 41 is provided on the inner wall of the bearing seat 4. An inner support component for limiting the weld seam of the flame tube is provided on the right side of the positioning disc 47. A bearing seat 2 6 is installed on the upper right side of the base 1. A handle 61 is rotatably connected to the right wall of the bearing seat 2 6. An eccentric disk 62 is fixedly connected to the left end of the handle 61. The left wall of the eccentric disk 62 has a positioning groove that matches the tail of the lower flame tube 3. A positioning component for locking the lower flame tube 3 is provided in the positioning groove.

[0020] The positioning plate 47, the upper flame tube 2, the lower flame tube 3 and the rotating handle 61 are coaxial. After the upper flame tube 2 and the lower flame tube 3 are combined, the inner diameter gradually decreases from left to right.

[0021] In use, the upper flame tube 2 and the lower flame tube 3 are placed on the roller support 11, and the tail of the lower flame tube 3 is inserted into the positioning groove in the eccentric plate 62. Rotating the adjusting screw 46 moves the elastic core tube 44 to the right, which in turn moves the sleeve 41, causing the positioning plate 47 to move to the right. During this process, due to the large elastic force of the elastic core tube 44, the elastic core tube 44 and the sleeve 41 are relatively fixed. When the positioning plate 47 moves to the right, causing the right-end conical protrusion to insert into the left port of the upper flame tube 2 and press against it, the upper flame tube 2 and the lower flame tube 3 are firmly connected. Simultaneously, the positioning component locks the tail of the lower flame tube 3, thus limiting the overall axial length of the flame tube and ensuring the radial position when the two parts of the flame tube are connected. When the pressing pressure of the positioning plate 47 is sufficient, the limiting component automatically locks the sleeve 41 to prevent... To prevent further extension and avoid excessive compression and damage to the two parts of the flame tube, the inner support component automatically extends and its outer end extends to the gap area to be welded between the upper flame tube 2 and the lower flame tube 3. Subsequently, the adjusting screw 46 is rotated, and the elastic core tube 44 is compressed and fed into the sleeve 41. The inner support component then automatically opens to strengthen the limiting of the weld area of ​​the flame tube from the inside, thereby improving the assembly accuracy, ensuring assembly safety, and avoiding excessive radial runout during rotary welding. In addition, the integrated control facilitates quick loading and unloading, improving the assembly and welding efficiency of the flame tube. When the flame tube needs to be rotated for subsequent welding, the rotating handle 61 drives the eccentric disk 62 to rotate, which in turn rotates the positioning disk 47, thereby causing the flame tube to deflect. The squeezing force of the positioning disk 47 makes it easy for the flame tube to be fixed relatively after rotating to any angle.

[0022] In the second embodiment, based on the above embodiment, three sets of rollers 12 are rotatably connected to the upper end of the roller support 11. Each set of rollers 12 is symmetrically arranged front and back, and the radius of the three sets of rollers 12 gradually increases from left to right.

[0023] In use, the two sets of rollers 12 on the left are used to support the upper flame tube 2, while the set of rollers 12 on the right, together with the positioning groove, can be used to support the lower flame tube 3. Through the design of the three sets of rollers 12 with the radius gradually increasing from left to right, it can be ensured that the upper flame tube 2 and the lower flame tube 3 are coaxial.

[0024] In embodiment three, based on the above embodiments, the limiting component includes a hydraulic oil cavity opened on the inner wall of the bearing seat 4 around the periphery of the sleeve 41. A piston 42 is fixedly connected to the outer wall of the sleeve 41 and slidably connected to the inner wall of the hydraulic oil cavity. Multiple solenoid valves 43 are arranged on the circumference of the piston 42. A pressure sensor 48 electrically connected to the solenoid valve 43 is installed on the right edge of the positioning disk 47.

[0025] When the initial solenoid valve 43 is opened, the sleeve 41 can drive the piston 42 to move to the right along the hydraulic oil chamber. The hydraulic oil flows through the solenoid valve 43 with little resistance to the piston 42. When the positioning plate 47 presses the upper flame tube 2 and the pressure sensor 48 detects that the pressure is sufficient, the pressure sensor 48 feeds back to control each solenoid valve 43 to close. The sleeve 41 is thus unable to continue moving and is locked to prevent further extension, avoiding excessive compression of the two parts of the flame tube and causing damage. The axial length dimension limitation of the flame tube is safe and reliable.

[0026] In Example 4, based on the above examples, the inner support assembly includes an adjusting tube 5 rotatably connected to the inner wall of the sleeve 41. The adjusting tube 5 has circumferentially arranged arc grooves 51 on both its upper and lower walls. The inner wall of the elastic core tube 44 has a pin 45 that is movably engaged with the arc grooves 51. A carrier tube 52 is slidably inserted into the inner wall of the adjusting tube 5. An adjusting disc 54 is fixedly connected to the right end of the carrier tube 52. A curved groove 55 is circumferentially opened on the adjusting disc 54. A rotating shaft 56 rotatably connected to the carrier tube 52 and slidably engaged with the adjusting tube 5. Several circumferentially arranged telescopic columns 57 are fixedly connected to the outer periphery of the right end of the rotating shaft 56. A protruding column 58 that is movably engaged with the curved groove 55 is provided on the left wall of the telescopic section of the telescopic column 57. The left wall of the fixed section of the telescopic column 57 has a sliding groove corresponding to the protruding column 58. Abutment wheels 59 are rotatably connected to the left and right sides of the outer end of the telescopic section of the telescopic column 57, with the radius of the left abutment wheel 59 being larger than that of the right abutment wheel 59. An electric lead screw 53 is rotatably connected to the left wall of the bearing seat 4 and is threaded into the carrier tube 52. The electric lead screw 53 is driven by a motor installed on the left wall of the bearing seat 4, and the motor is electrically connected to the pressure sensor 48.

[0027] The upper wall of the rotating shaft 56 is provided with a keyway, the inner wall of the right side of the adjusting tube 5 is provided with a key protrusion that is movably engaged with the keyway, and the front side of the carrier tube 52 is provided with a movable groove corresponding to the key protrusion.

[0028] When the positioning plate 47 presses the upper flame tube 2 and the pressure sensor 48 detects that the pressure is sufficient, and controls the locking of the sleeve 41, the pressure sensor 48 synchronously controls the motor to drive the electric screw 53 to rotate, which drives the carrier tube 52 to move the abutment wheel 59 part to the right to the gap area to be welded between the upper flame tube 2 and the lower flame tube 3. After the movement is completed, the key protrusion is still engaged with the keyway. As the adjusting screw 46 continues to rotate, the elastic core tube 44 is compressed and fed into the sleeve 41. The elastic core tube 44 drives the pin 45 to press the arc groove 51, causing the adjusting tube 5 to deflect. The adjusting tube 5 drives the key protrusion to move the keyway, thereby causing the rotating shaft 56 to deflect. The rotating shaft 56 drives the telescopic column 57 to deflect. The protrusion 58 is then driven by the bending groove 55, causing the telescopic column 57 to extend. The telescopic column 57 then causes the left abutment wheel 59 to abut against the internal port area of ​​the upper flame tube 2, while the right abutment wheel 59 abuts against the internal port area of ​​the lower flame tube 3, thereby strengthening the limiting of the weld area of ​​the flame tube from the inside, thus improving the assembly accuracy, ensuring the assembly safety, and avoiding excessive radial runout during subsequent rotary welding.

[0029] In Example 5, based on the above examples, the positioning assembly includes a locking block 63 rotatably connected at right angles to the upper and lower sides of the positioning groove. The upper and lower walls of the right end of the lower flame tube 3 have mounting edges that can be engaged by the locking block 63. A fixed gear 64 is fixedly connected to the middle of the locking block 63. A spring slide rod 65 is slidably inserted into the rear wall of the positioning groove. The spring force of the spring slide rod 65 is less than the spring force of the spring core tube 44. A gear frame 66 sleeved on the fixed gear 64 is fixedly connected to the left wall of the spring slide rod 65. An adjusting ring 67 is slidably engaged on the inner left wall of the bearing seat 2 6. An inclined surface is provided on the inner edge of the right wall of the adjusting ring 67 to movably abut against the spring slide rod 65. Two L-shaped connecting rods 68 that penetrate the roller support 11 are fixedly connected between the adjusting ring 67 and the sleeve 41.

[0030] The right wall of the inner cavity of the upper toothed frame 66 meshes with the fixed gear 64, and the left wall of the inner cavity of the lower toothed frame 66 meshes with the fixed gear 64. The middle part of the locking block 63 has a through groove that matches the toothed frame 66.

[0031] When the initial rotation of the adjusting screw 46 drives the sleeve 41 to move the positioning plate 47 to the right and press and fix the flame tube, the sleeve 41 simultaneously pushes the L-shaped connecting rod 68 to move steadily through the roller support 11 to the right, thereby causing the inclined surface of the adjusting ring 67 to compress the elastic slide rod 65 to contract. The elastic slide rod 65 then drives the upper and lower toothed frames 66 to cause the corresponding fixed gear 64 to drive the locking block 63 to deflect. The upper and lower locking blocks 63 then automatically press against the mounting edge of the lower flame tube 3, thereby locking the lower flame tube 3. Subsequently, when it is necessary to rotate and weld the flame tube, rotating the handle 61 drives the eccentric plate 62 to rotate. The elastic slide rod 65 is always compressed and contracted by the adjusting ring 67, thereby ensuring that the lower flame tube 3 is always in a locked state. The locking is reliable and convenient.

[0032] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A welding fixture for assembling a gas turbine flame tube, comprising a base (1), characterized in that, A roller support (11) is installed in the middle of the upper end of the base (1). An upper flame tube (2) and a lower flame tube (3) are movably arranged on the left and right sides of the upper end of the roller support (11). A shaft seat (4) is installed on the left side of the upper end of the base (1). A sleeve (41) is slidably inserted into the right end of the shaft seat (4). An elastic core tube (44) is slidably inserted into the left side of the sleeve (41). An adjusting screw (46) is rotatably connected to the left side of the elastic core tube (44) through a thrust bearing. A positioning plate (47) with a cone-shaped protrusion in the middle of the right end is rotatably connected to the right end of the sleeve (41). A limiting component for locking the sleeve (41) is provided on the inner wall of the shaft seat (4). An inner support component for limiting the weld seam of the flame tube is provided on the right side of the positioning plate (47). A second bearing seat (6) is installed on the upper right side of the base (1). A handle (61) is rotatably connected to the right wall of the second bearing seat (6). An eccentric disk (62) is fixedly connected to the left end of the handle (61). The left wall of the eccentric disk (62) has a positioning groove that is adapted to the tail of the lower flame tube (3). A positioning component for locking the lower flame tube (3) is provided in the positioning groove.

2. The gas turbine flame tube assembly welding fixture according to claim 1, characterized in that, The positioning plate (47), the upper flame tube (2), the lower flame tube (3) and the rotating handle (61) are coaxial, and the inner diameter of the upper flame tube (2) and the lower flame tube (3) gradually decreases from left to right after they are combined.

3. The gas turbine flame tube assembly welding fixture according to claim 2, characterized in that, The upper end of the roller support (11) is rotatably connected to three sets of rollers (12). Each set of rollers (12) is symmetrically arranged front and back, and the radius of the three sets of rollers (12) gradually increases from left to right.

4. The gas turbine flame tube assembly welding fixture according to claim 3, characterized in that, The limiting component includes a hydraulic oil chamber opened on the inner wall of the bearing seat (4) around the periphery of the sleeve (41). A piston (42) is fixedly connected to the outer wall of the sleeve (41) and slidably connected to the inner wall of the hydraulic oil chamber. Multiple solenoid valves (43) are arranged on the circumference of the piston (42). A pressure sensor (48) electrically connected to the solenoid valves (43) is installed on the right edge of the positioning disk (47).

5. The gas turbine flame tube assembly welding fixture according to claim 4, characterized in that, The inner support assembly includes an adjusting tube (5) rotatably connected to the inner wall of the sleeve (41). The adjusting tube (5) has circumferentially arranged arc grooves (51) on both its upper and lower walls. The inner wall of the elastic core tube (44) is provided with a pin (45) that movably engages with the arc grooves (51). A carrier tube (52) is slidably inserted into the inner wall of the adjusting tube (5). An adjusting disc (54) is fixedly connected to the right end of the carrier tube (52). A curved groove (55) is circumferentially formed on the adjusting disc (54). A rotating part is connected in the carrier tube (52). A rotating shaft (56) is slidably engaged with the regulating pipe (5). Several telescopic columns (57) are fixedly connected to the outer periphery of the right end of the rotating shaft (56). A protruding column (58) is provided on the left wall of the telescopic section of the telescopic column (57) and is movably engaged with the curved groove (55). The left wall of the fixed section of the telescopic column (57) has a sliding groove corresponding to the protruding column (58). Abutment wheels (59) are rotatably connected to the left and right sides of the outer end of the telescopic section of the telescopic column (57). The radius of the abutment wheel (59) on the left side is larger than the radius of the abutment wheel (59) on the right side. The left wall of the bearing seat (4) is rotatably connected to an electric lead screw (53) that is threaded into the carrier tube (52). The electric lead screw (53) is driven by a motor installed on the left wall of the bearing seat (4), and the motor is electrically connected to the pressure sensor (48).

6. The gas turbine flame tube assembly welding fixture according to claim 5, characterized in that, The upper wall of the rotating shaft (56) is provided with a keyway, the inner wall of the right side of the adjusting tube (5) is provided with a key protrusion that is movably engaged with the keyway, and the front side of the carrier tube (52) is provided with a movable groove corresponding to the key protrusion.

7. The gas turbine flame tube assembly welding fixture according to claim 6, characterized in that, The positioning assembly includes a locking block (63) rotatably connected to the upper and lower sides of the positioning groove at right angles. The upper and lower walls of the right end of the lower flame tube (3) have mounting edges that can be locked by the locking block (63). A fixed gear (64) is fixedly connected to the middle of the locking block (63). A spring slide rod (65) is slidably inserted into the rear wall of the positioning groove. The spring force of the spring slide rod (65) is less than the spring force of the spring core tube (44). A toothed frame (66) sleeved on the fixed gear (64) is fixedly connected to the left wall of the spring slide rod (65). An adjusting ring (67) is slidably locked into the inner wall of the left side of the second shaft seat (6). An inclined surface is provided on the inner edge of the right wall of the adjusting ring (67) that movably abuts against the spring slide rod (65). Two L-shaped connecting rods (68) that penetrate the roller support (11) are fixedly connected between the adjusting ring (67) and the sleeve (41).

8. The gas turbine flame tube assembly welding fixture according to claim 7, characterized in that, The right wall of the inner cavity of the upper tooth frame (66) meshes with the fixed gear (64), and the left wall of the inner cavity of the lower tooth frame (66) meshes with the fixed gear (64). The middle part of the locking block (63) has a through groove that is adapted to the tooth frame (66).

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