Repair device and repair method for flame tube ignition plug mounting seat

Abstract

The invention discloses a repair device for an aero-engine combustion chamber flame tube sparking plug mounting base, the repair device comprises a fixing assembly, a rotating assembly, a welding protection assembly and an argon supply assembly, the rotating assembly and the welding protection assembly are both mounted on a heat conducting plate at the top of the fixing assembly, and the argon supply assembly is connected with the welding protection assembly. The problems that an existing repairing device is long in welding time, high in rejection rate and not beneficial to health of operators during repairing are solved.

Description

Technical Field

[0001] The invention relates to the field of repair devices, in particular to a repair device and a repair method for a flame gun nozzle mounting seat. Background Art

[0002] The main combustion chamber of the aviation turbofan engine injects fuel into the main airflow after the compressor, stably burns the oil-gas mixture under various conditions, and produces a temperature field that meets the turbine inlet requirements. The flame tube is an important part of the combustion chamber, and each head of the flame tube has an air intake device, such as a main vortexer, a nozzle mount, a radial vortexer, a sleeve, and a baffle. At present, some high-failure-rate parts such as cracks on the outer wall of the flame tube, welding and detachment of the drainage sleeve of the combustion hole at the head of the flame tube, and wear of the flame tube block have relatively mature repair processes and methods, such as: A flame tube vacuum electron beam welding deformation control method and device described in the patent with application number 201911129466.0; and a Venturi welding repair device and scheme disclosed in the engine flame tube Venturi repair device and method CN202310983835.2, but there is currently no nozzle mount welding repair device and method and rapid welding repair device and method.

[0003] The nozzle mount is mainly used to install the nozzle for ignition. One end is fixed to the outer wall of the flame tube, and the other end is fixed to the engine ignition accessory. There is a gap on the nozzle mount for installing the sealing ring. The material of the sealing ring is GH696, and the material of the nozzle mount is TC11. Since the nozzle mount is not completely sealed and there is a gap between them, when the engine is working, the outer duct gas will flow out with the gap, causing the sealing ring to vibrate, and finally causing the wear of the sealing groove. As the engine is used for a longer time, the wear of the sealing groove increases further, so it does not meet the process requirements.

[0004] Currently, there are literature and patents on the repair of flame tube without nozzle mounting seat welding. The welding temperature of TC11 titanium alloy is generally between 800-900 degrees. In a high temperature environment, although TC11 titanium alloy can form a very hard oxide film after bluing, the aircraft engine is prone to high-frequency vibration when working, which can cause the surface of the nozzle mount to peel off or crack due to excessive stress, affecting the performance of the product; in addition, during use, if the titanium alloy surface is hit or rubbed, the oxide film may be damaged, thereby reducing the corrosion resistance of the titanium alloy. The higher the sintering temperature of the titanium alloy, the thicker the oxide film, and the greater the impact on the performance, especially medium and high temperature sintering (above 600°C) can significantly reduce the strength and ductility of the titanium alloy. Therefore, according to the requirements of the aircraft engine overhaul guidelines, the nozzle mount is usually manufactured as an integrated process. If welding is required, oxidation and bluing on the surface are not allowed.

[0005] Since the nozzle mount is made of TC11 titanium alloy, oxidation must not occur during the welding process to ensure its good performance. Each engine has two nozzle mounts, and the nozzle mounts do not need to be repaired every time the engine is overhauled. Therefore, it is obviously not in line with the value of profit to weld and repair the sealing groove of the nozzle mount using equipment such as a vacuum welding furnace.

[0006] Therefore, the current existing welding method is to fill the gap of the sealing ring through argon arc welding, and then process the sealing ring installation groove that meets the process requirements. However, long-term welding will increase the temperature of the nozzle mounting seat, and the flow rate of argon gas sprayed by the welding gun is small, and the spraying area is small, which cannot achieve full coverage of the nozzle mounting seat, and thus oxidation is easy to occur. Therefore, in order to prevent the formation of an oxide layer, it is usually necessary to release argon gas from the welding gun to blow the surface of the welding position after welding a short section, and then continue welding and filling after the surface cools down. In addition, the gap that needs to be repaired in the nozzle mounting seat is circular, so after welding a certain distance, it is necessary to stop and blow argon gas for a period of time, and then turn the nozzle mounting seat after the nozzle mounting seat cools down to a temperature that can be touched by gloves, so that welding can continue. This welding repair method is not only time-consuming and inefficient, but also long-term welding will cause some damage to the welder's lumbar and cervical vertebrae; and there is also the possibility of welding failure and the formation of an oxide layer.

[0007] In summary, the existing welding method has the following advantages: simple and convenient repair, no need to add equipment, and low cost. However, the disadvantages are: (1) Although this repair method is simple, it is necessary to stop welding after welding 2-3mm each time, and use argon gas to cool the welding position; after welding a certain distance, the nozzle mounting seat needs to be rotated before continuing welding; under this welding method, the welding time of each nozzle mounting seat is at least about 40 minutes. (2) Since welding is done in an exposed environment, the formation of an oxide layer cannot be 100% eliminated. Therefore, the scrap rate of this welding method is currently around 8-12%, and the scrap rate is directly related to the welder's skills. (3) The welder wears a helmet and bends over for a long time at the workstation to weld, which not only increases the fatigue of the welder's waist and back, but also increases the probability of lumbar spondylosis. . Summary of the invention

[0008] The purpose of the present invention is to provide a repair device and a repair method for a flame gun nozzle mounting seat, so as to solve the problems of long welding time, high scrap rate and disadvantageous to the health of operators during repair by the existing repair device.

[0009] In order to solve the above technical problems, the present invention adopts the following technical solutions: A repair device for an aero-engine combustion chamber flame tube nozzle mounting seat comprises a fixing assembly, a rotating assembly, a welding protection assembly and an argon gas supply assembly. The rotating assembly and the welding protection assembly are both mounted on a heat conducting plate on top of the fixing assembly, and the argon gas supply assembly is connected to the welding protection assembly.

[0010] In this solution, the nozzle mounting seat can be placed in an argon protection environment during the welding repair process; the welder drives the rotating component with his feet and turns the speed dial according to his own welding speed, thereby achieving continuous welding of the nozzle mounting seat; the welder's elbows support the support plate on the fixed component, thereby reducing the force on the spine and reducing fatigue.

[0011] As a further preferred embodiment of the present invention, the fixing assembly includes a table frame, a heat conducting plate, a back plate and an adjustment bolt, the heat conducting plate and the back plate are horizontally arranged at the front and rear of the top surface of the table frame respectively, and the adjustment bolt is arranged at the bottom of the table frame.

[0012] As a further preferred embodiment of the present invention, the rotating component includes a foot plate, a connecting rod, a vertical bevel gear mounting seat, a vertical bevel gear, a transverse bevel gear mounting seat, a transverse bevel gear and a turntable. The vertical bevel gear mounting seat and the transverse bevel gear mounting seat are sequentially mounted on the heat conduction plate at the top of the fixed component from front to back, the vertical bevel gear is arranged on the top of the vertical bevel gear mounting seat, and the transverse bevel gear is arranged at the front end of the transverse bevel gear mounting seat. The vertical bevel gear and the transverse bevel gear are meshed and connected, the connecting rod is passed through the center position of the vertical bevel gear mounting seat and the vertical bevel gear, the bottom of the connecting rod is connected to the foot plate, and the turntable is connected to the rear end of the connecting shaft passed through the transverse bevel gear mounting seat and the center position of the transverse bevel gear, and the turntable is used to be connected to the electric nozzle mounting seat.

[0013] As a further preferred embodiment of the present invention, the welding protection assembly includes an upper cover and a lower cover, a left cavity and a right cavity are formed between the upper cover and the lower cover, an inner hole heat-conducting wall is between the left cavity and the right cavity, the front wall of the right cavity is an outer hole heat-conducting wall, and the middle parts of the inner hole heat-conducting wall and the outer hole heat-conducting wall are respectively provided with an inner hole and an outer hole; and an upper cover welding window is provided on the top of the upper cover.

[0014] As a further preferred embodiment of the present invention, the argon gas supply assembly includes an argon gas source, an argon gas pipe, a pressure gauge, a flow meter and a gas pipe quick connector. The argon gas source is connected to the bottom of the welding protection assembly through the argon gas pipe, and the pressure gauge and the flow meter are connected to the middle of the argon gas pipe under the action of the gas pipe quick connector.

[0015] The method for repairing with any one of the above-mentioned repair devices comprises the following steps: A. Open the upper cover of the welding protection assembly, place the nozzle mounting seat on the lower cover of the welding protection assembly, connect the rotating disk with the nozzle mounting seat with bolts, and cover the upper cover; B. Cover the skylight plug on the upper cover welding window of the upper cover of the welding protection assembly; C. Connect and assemble the argon gas supply assembly, turn on the argon gas source of the argon gas supply assembly, and adjust the flow meter of the argon gas supply assembly to make the gas supply pressure and flow reach the specified parameters; D. After 30 seconds, touch the exhaust hole with your hand to see if there is gas discharged; E. Sit in front of the fixed assembly, lean your hands on the backboard, and step on one foot On the foot plate of the rotating component; F. Turn on the welding machine of the welding component, adjust it to the argon arc welding gear, and adjust the current; G. Insert the welding gun and welding wire of the welding machine from the upper cover welding window on the upper cover of the welding protection component into the sealing ring mounting groove of the nozzle mounting seat and start welding; H. Rotate the foot plate of the rotating component with your feet, and the nozzle mounting seat 1 is driven to rotate through the rotating component; the welder rotates the foot plate of the rotating component according to his own welding speed, thereby realizing the welder's continuous welding; I. After the welding is completed, remove the bolts and the upper cover of the welding protection component, and machine the nozzle mounting seat with a lathe; process it to meet the size.

[0016] By setting up a repair device including a support component, a rotating component and an argon gas supply component; and in the welding repair process of the flame torch nozzle mounting seat, the welded part of the flame torch nozzle mounting seat is protected by argon gas; the heat generated during the welding process is transferred from the installation part of the sealing ring of the welding nozzle mounting seat to the outer wall, and part of the outer wall is not only protected by argon gas, but also in contact with the welding protection component, so that the welding protection component can also play a role in heat conduction and cooling, so that not only can the outer wall of the nozzle mounting seat be placed in a low temperature and argon protection environment, eliminating the generation of an oxide layer, but also can avoid the nozzle mounting seat from increasing in temperature due to long-term welding, thereby generating thermal stress or deformation. Ultimately, the purpose of shortening the repair time of the nozzle mounting seat by 60% and achieving a 100% repair success rate is achieved; at the same time, because the support plate set by the fixed component allows the welder's upper body to be supported by both elbows, it effectively reduces the pressure on the spine caused by the welder during welding, relieves the fatigue of the welder's back, and makes the designed welding tooling more ergonomic.

[0017] As a further preferred embodiment of the present invention, the welding parameters during welding are as follows: the brand of the welding wire is TC11, and the diameter is 2.0-2.5 mm; the argon gas flow rate is 15-18 L / min, and the gas supply pressure is 3-6 KPa.

[0018] The welding parameters during welding are as follows: the material of the welding wire is TC11, the diameter is 2.0-2.5mm, and it can also be cut from a TC11 titanium alloy plate with a thickness of 2-2.5mm; the argon gas flow rate is 15-18L / min, and the gas supply pressure is 3-6KPa. The welding current is 40±1.5A; the coaxiality between the two circular holes on the welding protection component is required to be within Φ0.05, and the gap between the circular hole and the cylindrical outer wall of the nozzle mounting seat is 0.3-0.5mm; to ensure that the nozzle mounting seat can be protected by argon gas and can rotate freely during the welding process.

[0019] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects: 1. A sealed cavity filled with argon gas is formed on the back of the nozzle mounting seat through tooling, so that it can be well protected from oxidation during welding and the welding qualification rate reaches 100%.

[0020] 2. Use your feet to rotate the foot plate, and transmit the torque to the turntable through the connecting rod, vertical bevel gear mounting seat, vertical bevel gear, transverse bevel gear mounting seat and transverse bevel gear; the turntable drives the rotation of the electric nozzle mounting seat, thereby realizing continuous welding of the welder, which can shorten the welding time by more than 60%.

[0021] 3. Since the welding protection component and the heat conducting plate are made of copper, they can play a good role in heat conduction. Long-term welding will not cause the local temperature of the nozzle mounting seat to rise, generate thermal stress or soften due to local temperature rise.

[0022] 4. The design of the welding repair device is ergonomic. During the welding process, the welder leans his hands on the backboard as the main support, which reduces the stress on the lumbar and cervical vertebrae, thereby reducing the welder's fatigue caused by long-term welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 It is a three-dimensional diagram of the present invention.

[0025] Nozzle mounting seat 1, sealing ring mounting groove 1-1, outer tube wall 1-2, bolt hole 1-3, fixing assembly 2, table frame 2-1, heat conduction plate 2-2, back plate 2-3, adjustment bolt 2-4, rotating assembly 3, foot plate 3-1, connecting rod 3-2, vertical cone gear mounting seat 3-3, vertical cone gear 3-4, transverse cone gear mounting seat 3-5, transverse cone gear 3-6, turntable 3-7, welding protection assembly 4, upper cover 4-1, lower cover 4-2, inner hole 4-3, outer hole 4-4, left cavity 4-5, right cavity 4-6, inner hole heat conduction wall 4-7, outer hole heat conduction wall 4-8, upper cover welding window 4-9, argon gas supply assembly 5, argon gas source 5-1, argon gas pipe 5-2, pressure gauge 5-3, welding assembly 6, welding gun 6-1, welding wire 6-2, bolt 7. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which 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 limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Specific embodiment 1: Specific embodiment 1: Figure 1 , Figure 2 A repair device for a flame gun nozzle mounting seat 1 is shown, comprising 2, a rotating assembly 3, a welding protection assembly 4, and an argon gas supply assembly 5. The rotating assembly 3 and the welding protection assembly 4 are both installed on the heat conduction plate 2-2 at the top of 2, and the argon gas supply assembly 5 is connected to the welding protection assembly 4.

[0033] In this solution, the nozzle mounting base 1 can be placed in an argon protection environment during the welding repair process; the welder drives the rotating component 3 with his feet and rotates the speed dial 3-7 according to his own welding speed, thereby achieving continuous welding of the nozzle mounting base 1; the welder's elbows are supported on the support plate on the support 2, thereby reducing the force on the spine and reducing fatigue. Specific embodiment 2; This embodiment further explains 2 on the basis of the specific embodiment 1, wherein 2 includes a table frame 2-1, a heat conducting plate 2-2, a back plate 2-3 and a bolt 7 adjusting bolt 72-4, wherein the heat conducting plate 2-2 and the back plate 2-3 are horizontally arranged at the front and rear of the top surface of the table frame 2-1, respectively, and the bolt 7 adjusting bolt 72-4 is arranged at the bottom of the table frame 2-1. Specific embodiment 3: This embodiment further illustrates the rotating assembly 3 on the basis of the specific embodiment 1, wherein the rotating assembly 3 comprises a foot plate 3-1, a connecting rod 3-2, a vertical cone gear mounting seat 3-3, a vertical cone gear 3-4, a transverse cone gear 3-6, a transverse cone gear 3-6 mounting seat 3-5, a transverse cone gear 3-6 and a rotating disk 3-7, wherein the vertical cone gear mounting seat 3-3 and the transverse cone gear 3-6, the transverse cone gear 3-6 mounting seat 3-5 are sequentially mounted on the heat conducting plate 2-2 at the top of the 2 from front to back, and the vertical cone gear 3-4 is arranged on the top of the vertical cone gear mounting seat 3-3. The transverse bevel gear 3-6 is arranged at the front end of the transverse bevel gear 3-6 transverse bevel gear 3-6 mounting seat 3-5, the vertical bevel gear 3-4 and the transverse bevel gear 3-6 are meshingly connected, the connecting rod 3-2 is passed through the center position of the vertical bevel gear mounting seat 3-3 and the vertical bevel gear 3-4, the bottom of the connecting rod 3-2 is connected to the foot plate 3-1, the turntable 3-7 is connected to the rear end of the connecting shaft passed through the transverse bevel gear 3-6 transverse bevel gear 3-6 mounting seat 3-5 and the center position of the transverse bevel gear 3-6, and the turntable 3-7 is used to be connected to the nozzle mounting seat 1. Specific embodiment 4: This embodiment further illustrates the welding protection component 4 on the basis of the specific embodiment 1. The welding protection component 4 includes an upper cover 4-1 and a lower cover 4-2. A left cavity and a right cavity are formed between the upper cover 4-1 and the lower cover 4-2. An inner hole heat-conducting wall 4-7 is between the left cavity and the right cavity. The front wall of the right cavity is an outer hole heat-conducting wall 4-8. An inner hole 4-3 and an outer hole 4-4 are respectively provided in the middle of the inner hole heat-conducting wall 4-7 and the outer hole heat-conducting wall 4-8. An upper cover welding window 4-9 is provided on the top of the upper cover 4-1. Specific embodiment 5: This embodiment further illustrates the argon gas supply assembly 5 based on the specific embodiment 1. The argon gas supply assembly 5 includes an argon gas source 5-1, an argon gas pipe 5-2, a pressure gauge 5-3, a flow meter and a gas pipe quick connector. The argon gas source 5-1 is connected to the bottom of the welding protection assembly 4 through the argon gas pipe 5-2. The pressure gauge 5-3 and the flow meter are connected to the middle of the argon gas pipe 5-2 by the action of the gas pipe quick connector. Specific embodiment 6: The method for repairing by using any one of the above-mentioned repair devices comprises the following steps: A. Open the upper cover 4-1 of the welding protection assembly 4, place the nozzle mounting seat 1 on the lower cover 4-2 of the welding protection assembly 4, connect the turntable 3-7 with the nozzle mounting seat 1 with bolts 7, and cover the upper cover 4-1; B. Cover the skylight plug on the upper cover welding window 4-9 of the upper cover 4-1 of the welding protection assembly 4; C. Connect and assemble the argon gas supply assembly 5, open the argon gas source 5-1 of the argon gas supply assembly 5, and adjust the flowmeter of the argon gas supply assembly 5 so that the gas supply pressure and flow rate reach the specified parameters; D. After 30 seconds, touch the exhaust hole with your hand to see if there is gas discharged; E. Sit in front of 2, lean your hands on the backboard 2-3, and step one foot on the rotating assembly F. Turn on the welding machine of the welding assembly 6, adjust it to the argon arc welding gear, and adjust the current; G. Insert the welding gun 6-1 and the welding wire 6-2 of the welding machine from the upper cover welding window 4-9 on the upper cover 4-1 of the welding protection assembly 4 into the sealing ring mounting groove 1-1 of the nozzle mounting seat 1 to start welding; H. Rotate the foot plate 3-1 of the rotating assembly 3 with your feet, and the nozzle mounting seat 11 is driven to rotate through the rotating assembly 3; the welder rotates the foot plate 3-1 of the rotating assembly 3 according to his own welding speed, thereby realizing the welder's continuous welding; I. After the welding is completed, remove the bolts 7 and the upper cover 4-1 of the welding protection assembly 4, and machine the nozzle mounting seat 1 with a lathe; process it to meet the size.

[0039] By setting up a repair device including a support component, a rotating component 3 and an argon supply component 5; and in the welding repair process of the flame torch nozzle mounting seat 1, the welded part of the flame torch nozzle mounting seat 1 is protected by argon gas; the heat generated during the welding process is transferred from the sealing ring installation part of the welding nozzle mounting seat 1 to the outer wall, and part of the outer wall is not only protected by argon gas, but also in contact with the welding protection component 4, so that the welding protection component 4 can also play a role in heat conduction and cooling, so that not only can the outer wall of the nozzle mounting seat 1 be placed in a low temperature and argon protective environment, eliminating the generation of an oxide layer, but also can avoid the nozzle mounting seat 1 from increasing in temperature due to long-term welding, thereby generating thermal stress or deformation. Finally, the repair time of the nozzle mounting seat 1 is shortened by 60%, and the repair success rate reaches 100%; at the same time, because the support plate 2 can allow the welder's upper body to be supported by both elbows, it can effectively reduce the pressure on the spine caused by the welder during the welding process, relieve the fatigue of the welder's back, and make the designed welding tooling more ergonomic. Specific embodiment 7: This embodiment further explains the welding parameters based on the specific embodiment 6. The welding parameters during welding are as follows: the brand of welding wire 6-2 is TC11, and the diameter is 2.0-2.5mm; the argon gas flow rate is 15-18L / min, and the gas supply pressure is 3-6KPa.

[0041] The welding parameters during welding are as follows: the material of the welding wire 6-2 is TC11, the diameter is 2.0-2.5mm, and it can also be cut from a TC11 titanium alloy plate with a thickness of 2-2.5mm; the argon gas flow rate is 15-18L / min, and the gas supply pressure is 3-6KPa. The welding current is 40±1.5A; the coaxiality between the two circular holes on the welding protection component 4 is required to be within Φ0.05, and the gap between the circular hole and the cylindrical outer wall of the nozzle mounting seat 1 is 0.3-0.5mm; to ensure that the nozzle mounting seat 1 can be protected by argon gas and can rotate freely during the welding process.

[0042] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A repair device for a flame torch nozzle mounting seat, characterized in that: It includes a fixed component, a rotating component, a welding protection component, and an argon gas supply component. The rotating component and the welding protection component are both installed on a heat conduction plate on the top of the fixed component, and the argon gas supply component is connected to the welding protection component.

2. The repair device for the flame tube nozzle mounting seat according to claim 1, characterized in that: The fixing assembly includes a table frame, a heat conducting plate, a backing plate and an adjusting bolt. The heat conducting plate and the backing plate are respectively arranged horizontally at the front and rear of the top surface of the table frame, and the adjusting bolt is arranged at the bottom of the table frame.

3. The repair device for the flame tube nozzle mounting seat according to claim 1, characterized in that: The rotating assembly includes a foot plate, a connecting rod, a vertical bevel gear mounting seat, a vertical bevel gear, a transverse bevel gear mounting seat, a transverse bevel gear and a turntable. The vertical bevel gear mounting seat and the transverse bevel gear mounting seat are sequentially mounted on the heat conduction plate at the top of the fixed assembly from front to back. The vertical bevel gear is arranged on the top of the vertical bevel gear mounting seat, and the transverse bevel gear is arranged at the front end of the transverse bevel gear mounting seat. The vertical bevel gear and the transverse bevel gear are meshed and connected. The connecting rod is passed through the center position of the vertical bevel gear mounting seat and the vertical bevel gear, and the bottom of the connecting rod is connected to the foot plate, and the turntable is connected to the rear end of the connecting shaft passed through the transverse bevel gear mounting seat and the center position of the transverse bevel gear, and the turntable is used to be connected to the nozzle mounting seat.

4. The repair device for the flame tube nozzle mounting seat according to claim 1, characterized in that: The welding protection assembly includes an upper cover and a lower cover, a left cavity and a right cavity are formed between the upper cover and the lower cover, an inner hole heat-conducting wall is between the left cavity and the right cavity, the front wall of the right cavity is an outer hole heat-conducting wall, and the middle parts of the inner hole heat-conducting wall and the outer hole heat-conducting wall are respectively provided with an inner hole and an outer hole; an upper cover welding window is provided on the top of the upper cover.

5. The repair device for the flame tube nozzle mounting seat according to claim 1, characterized in that: The argon gas supply assembly includes an argon gas source, an argon gas pipe, a pressure gauge, a flow meter and a gas pipe quick connector. The argon gas source is connected to the bottom of the welding protection assembly through the argon gas pipe. The pressure gauge and the flow meter are connected to the middle of the argon gas pipe under the action of the gas pipe quick connector.

6. A method for repairing using a repair device according to any one of claims 1 to 5, characterized in that: The method comprises the following steps: A. opening the upper cover of the welding protection assembly, placing the nozzle mounting seat on the lower cover of the welding protection assembly, connecting the nozzle mounting seat with the rotating disk with bolts, and covering the upper cover; B. placing the skylight plug on the upper cover welding window of the upper cover of the welding protection assembly; C. Connect and assemble the argon gas supply assembly, turn on the argon gas source of the argon gas supply assembly, and adjust the flowmeter of the argon gas supply assembly to make the gas supply pressure and flow reach the specified parameters; D. After 30 seconds, touch the exhaust hole with your hand to see gas discharged; E. Sit in front of the fixed assembly, lean your hands on the back plate, and step one foot on the foot plate of the rotating assembly; F. Turn on the welding machine of the welding assembly, adjust it to the argon arc welding gear, and adjust the current; G. Insert the welding gun and welding wire of the welding machine from the upper cover welding window on the upper cover of the welding protection assembly into the sealing ring mounting groove of the nozzle mounting seat, and start welding; H. Use your feet to rotate the foot plate of the rotating assembly, and the rotating assembly drives the rotation of the nozzle mounting seat 1; the welder rotates the foot plate of the rotating assembly according to his own welding speed, thereby realizing the welder's continuous welding; I. After the welding is completed, remove the bolts and the upper cover of the welding protection assembly, and machine the nozzle mounting seat with a lathe to produce the required size.

7. The repair method according to claim 6, characterized in that: The welding parameters during welding are as follows: the brand of welding wire is TC11, and the diameter is 2.0-2.5mm; the argon gas flow rate is 15-18L / min, and the gas supply pressure is 3-6KPa.

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