Steam turbine blade welding device

Abstract

The invention provides a steam turbine blade welding device and relates to the technical field of welding devices.The steam turbine blade welding device comprises two stand columns, an electric guide rail is fixedly installed between the two stand columns, a sliding seat is slidably installed at the bottom of the electric guide rail, a fixing support is installed at the bottom of the sliding seat, and a welding gun cavity is fixedly installed at one end of the fixing support; an emission groove is formed in the center of the welding gun cavity; according to the invention, the infrared sensor can detect the pit at the front end, and transmits data to the synchronous controller to control the electric control push rod, so that the output end of the electric control push rod extends to a corresponding length, and when the electric control push rod extends, the electric control push rod drives the transmission connecting rod and the focusing cylinder to move, so that the focusing cylinder can adjust the distance between the focusing lens and the collimating lens. By means of the structure, the laser welding device can adjust the welding position in time according to the depth of the pit during welding, so that it is ensured that the temperature of laser welding is kept consistent, and the effect after welding is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of welding devices, and in particular to a steam turbine blade welding device. Background Art

[0002] A steam turbine is a rotary steam power device, in which multiple blades need to be installed to convert kinetic energy. Under long-term use of the steam turbine, the surface of the blades will be worn to a certain extent. In order to ensure the conversion performance of the blades, it is necessary to weld and repair the worn blades. For example, the patent announcement number is CN214868153U, a welding device for repairing cracked blades of wind turbines, including a welding mechanism, an adjustment mechanism and a generator blade body, the adjustment mechanism is located above the welding mechanism, the generator blade body is located above the adjustment mechanism, the adjustment mechanism includes an electric push rod, one end of the back of the electric push rod is fixedly connected to a movable push block, the top of the movable push block is fixedly connected to a movable block, the top of the movable block is fixedly connected to an adjustment frame, the left side of the top of the adjustment frame is fixedly connected to a servo motor, the output shaft of the servo motor is fixedly connected to a threaded rod, and the outer side of the threaded rod is threadedly connected to a threaded block. The welding device for repairing cracked blades of wind turbines has a simple overall structure, realizes the purpose of facilitating the adjustment of the welding device, and the welding device can perform multi-range welding on the blades of wind turbines, ensuring the effect of wind turbine blade repair.

[0003] Laser welding is generally used for fine welding such as blades. However, when welding with existing welding devices, if deeper wear pits appear on the blade surface, the welding distance will change, resulting in deviations in the welding focus when welding deeper pits, and then the welding temperature and welding position will shift, resulting in a decrease in strength after welding, which is not conducive to subsequent grinding processing. For this reason, the present application designs a turbine blade welding device that can automatically adjust according to the welding depth to ensure the stability of the welding temperature. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a turbine blade welding device, which solves the problem of insufficient welding strength caused by focusing deviation when the prior welding device encounters a too deep pit during the welding process.

[0005] To achieve the above object, the technical solution adopted by the present invention is: A steam turbine blade welding device, comprising two columns, an electric guide rail is fixedly installed between the two columns, a slide seat is slidably installed at the bottom of the electric guide rail, a fixed bracket is installed at the bottom of the slide seat, a welding gun cavity is fixedly installed at one end of the fixed bracket, a launch slot is opened at the center of the welding gun cavity, a laser generator is fixedly installed at the upper end of the launch slot, a focusing cylinder is arranged at the lower end of the launch slot, a focusing lens and a protective lens are respectively installed inside the focusing cylinder, a placement cylinder is installed in the middle of the launch slot, and a collimating lens is installed inside the placement cylinder; A discharge assembly for discharging solder and protective gas is installed at the bottom of the welding gun cavity, and a calibration assembly for detecting the depth of the pit and a feeding assembly for feeding solder are installed outside the welding gun cavity.

[0006] Preferably, a plurality of limit slide grooves are provided on the lower side of the inner wall of the emitting groove, a plurality of limit sliders are fixedly installed on the outer side of the focusing cylinder, the limit sliders are slidably matched with the limit slide grooves, and a plurality of transmission racks are provided on the outer surface of the focusing cylinder.

[0007] Preferably, the feeding assembly includes a material storage trough, which is opened on the upper side of the welding gun cavity, and a plurality of material delivery pipelines are installed outside the material storage trough, and each of the material delivery pipelines is connected to the material storage box through a delivery pump.

[0008] Preferably, a rotating ring is rotatably mounted on the upper side of the material storage trough, a spiral blade for controlling the amount of material discharged is fixedly mounted on the bottom of the rotating ring, an extended boss is fixedly mounted on the upper end of the rotating ring, and a plurality of matching tooth grooves are formed on the upper surface of the extended boss; An upper mounting groove is provided on the upper side of the material storage tank, a driving motor is fixedly installed inside the upper mounting groove, a transmission gear is fixedly installed at the output end of the driving motor, and the transmission gear is meshed with the matching tooth groove.

[0009] Preferably, the discharge assembly includes a plurality of receiving grooves, and the plurality of receiving grooves are respectively opened on the lower side of the inner part of the welding gun cavity, a sealing rotating seat is arranged at the bottom of each receiving groove, a sealing ball seat is movably arranged inside the sealing rotating seat, a focusing hopper for gathering materials is arranged at the upper end of the sealing ball seat, a material guide pipe for discharging materials is arranged at the lower end of the sealing ball seat, and a discharge channel is opened inside the sealing ball seat.

[0010] Preferably, the upper ends of several of the receiving troughs are communicated with the material storage troughs respectively, and the inner walls of several of the receiving troughs are installed with fixing rings, and the bottom of the fixing rings is installed with rubber soft sleeves, and the rubber soft sleeves are connected to the upper end of the centralized hopper.

[0011] Preferably, a spiral channel is provided inside the welding gun cavity, the spiral channel surrounds the outside of the focusing cylinder, an air inlet channel is provided at the upper end of the spiral channel, and an air connection pipe for connecting an air pump is fixedly installed at the outer end of the air inlet channel; An exhaust pipe is installed on the inner wall of each receiving trough, and a plurality of channels are opened at the lower end of the spiral channel to be connected with the corresponding exhaust pipes. Each exhaust pipe has an exhaust port arranged obliquely close to the centralized hopper.

[0012] Preferably, the proofreading assembly includes an expansion ring, a plurality of infrared sensors for detecting the depth of the pit are installed at the bottom of the expansion ring, a lower mounting groove is opened on the lower side of the outer wall of the welding gun cavity, a synchronous controller for controlling the welding position is installed inside the lower mounting groove, and the synchronous controller is connected to the infrared sensor by a cable.

[0013] Preferably, an electric control push rod is installed inside the lower mounting slot, and the electric control push rod is connected to the synchronization controller through a cable. A synchronization through hole is opened on one side of the inner wall of the transmitting slot, and a transmission connecting rod is movably installed inside the synchronization through hole. One end of the transmission connecting rod is connected to the focusing cylinder, and the other end of the transmission connecting rod is connected to the output end of the electric control push rod.

[0014] Preferably, a driven tooth groove is provided on one side of each sealing ball seat, and a transmission groove is provided inside the welding gun cavity, and a driven gear and a synchronous gear that mesh with each other are rotatably installed inside the transmission groove, the synchronous gear meshes with the driven tooth groove, and the driven gear meshes with the transmission rack.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. By starting the driving motor, the transmission gear can be driven to rotate continuously. During the rotation of the transmission gear, the meshing transmission between the transmission gear and the matching tooth groove is utilized to rotate the extended boss, and the rotating ring is driven to rotate continuously. The rotating ring is driven to rotate by the above structure so that the spiral blade below it rotates with it. The spiral blade is arranged inside the storage tank, so that the amount of solder falling inside the storage tank can be controlled, ensuring that the solder is discharged more evenly, avoiding the problem of solder discharge blockage or unevenness.

[0016] 2. The sealing ball seat is movably arranged in the sealing rotating seat, so that the angle of the guide pipe can be adjusted. In order to avoid the interference of material discharge of the guide pipe due to the angle adjustment, the present application can gather the protective gas and the solder together through the centralized hopper, which not only ensures the discharge of the material, but also allows the protective gas to bring out the solder together when it is discharged. While avoiding the interference of material discharge, the discharge strength can also discharge the solder to the corresponding range.

[0017] 3. Connect the air pump that delivers the shielding gas through the air connecting pipe, so that the shielding gas can stably enter the air inlet channel. After entering, it will fall along the spiral channel. In this process, the temperature of the current focusing cylinder can be taken away by the shielding gas, avoiding serious heat accumulation inside the focusing cylinder, so that the application can be welded for a long time. Then the shielding gas will be discharged from the exhaust pipe, and when discharged, it will take away the solder at the current concentrated hopper to realize the discharge of the solder and gas together, ensuring that the gas is located at the solder.

[0018] 4. During welding, the front end pit can be detected by an infrared sensor. After the depth of the pit is detected, the data is transmitted to the synchronous controller, and the electric push rod is controlled to extend the output end of the electric push rod to the corresponding length. When the electric push rod is extended, the transmission connecting rod and the focusing cylinder are driven to move. The position of the focusing cylinder is moved by sliding with the limiting slider and the limiting groove, so that the focusing cylinder can adjust the distance between the focusing lens and the collimating lens to adjust the welding position. The above structure can make the present application able to adjust the welding position according to the depth of the pit in time during welding to ensure that the temperature of the laser welding remains consistent and the effect after welding is ensured.

[0019] 5. By moving the focusing cylinder, the transmission rack moves up and down, and the transmission rack is meshed with the driven gear to realize power transmission. In order to synchronize the focusing position, the synchronous gear is meshed with the driven tooth groove. When the welding position rises, the outer material guide tube will also flip inward, so that the material discharged by the material guide tube coincides with the welding focal point, realizing high-precision welding. Compared with the fixed discharge position, part of the solder will spread outward, which not only makes the amount of solder falling on the welding point uncontrollable, resulting in insufficient welding strength, but also the solder will scatter to the periphery of the welding point, causing the blade surface to require additional grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the present application; Figure 2 It is a schematic diagram of the structure of the present invention when viewed from above; Figure 3 It is a schematic diagram of the three-dimensional structure of the welding gun cavity; Figure 4 This is a three-dimensional structural diagram of the welding gun chamber from another perspective; Figure 5 It is a schematic diagram of the top view of the welding gun chamber; Figure 6 yes Figure 5 Schematic diagram of the cross-section structure at AA; Figure 7 yes Figure 6 A is an enlarged schematic diagram of the structure; Figure 8 yes Figure 6 The enlarged structural diagram at b in the middle; Fig. 9 yes Figure 5 Schematic diagram of the cross-section structure at BB; Fig.10 It is a schematic diagram of the front view structure of the welding gun chamber; Fig.11 yes Fig.10 Schematic diagram of the cross-section structure at CC; Fig.12 yes Fig.10 Schematic diagram of the cross-sectional structure at DD in the middle.

[0021] In the figure: 1, column; 2, electric guide rail; 3, slide seat; 4, fixed bracket; 5, welding gun chamber; 6, discharge assembly; 601, receiving groove; 6011, fixing ring; 6012, rubber soft sleeve; 602, sealing ball seat; 6021, centralized hopper; 6022, guide pipe; 6023, discharge channel; 6024, driven tooth groove; 603, sealing rotating seat; 604, transmission rotating groove; 6041, driven gear; 6042, synchronous gear; 7, proofreading assembly; 701, expansion ring; 702, infrared sensor; 703, lower mounting groove; 704, synchronous controller; 705, electric control push rod; 706, synchronous through hole; 707, transmission connecting rod; 8, feeding assembly; 801, upper mounting groove; 802, feeding pipeline; 803, driving motor; 8031, transmission gear; 804, storage tank; 805, rotating ring; 8051, spiral blade; 8052, extension boss; 8053, matching tooth groove; 9, air connecting pipeline; 901, air inlet channel; 902, spiral channel; 903, exhaust pipe; 10, laser generator; 11, launching slot; 12, placement tube; 13, focusing cylinder; 1301, focusing lens; 1302, protective lens; 1303, limit slider; 1304, transmission rack; 14, collimating lens; 15, limit slide groove. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] like Figures 1 to 12As shown, a steam turbine blade welding device comprises two columns 1, an electric guide rail 2 is fixedly installed between the columns 1, a slide seat 3 is slidably installed at the bottom of the electric guide rail 2, a fixed bracket 4 is installed at the bottom of the slide seat 3, a welding gun cavity 5 is fixedly installed at one end of the fixed bracket 4, a launch slot 11 is opened at the center of the welding gun cavity 5, a laser generator 10 is fixedly installed at the upper end of the launch slot 11, a focusing cylinder 13 is arranged at the lower end of the launch slot 11, a focusing lens 1301 and a protective lens 1302 are respectively installed inside the focusing cylinder 13, a placement cylinder 12 is installed in the middle of the launch slot 11, and a collimating lens 14 is installed inside the placement cylinder 12; A discharge assembly 6 for discharging solder and protective gas is installed at the bottom of the welding gun cavity 5, and a calibration assembly 7 for detecting the depth of the pit and a feeding assembly 8 for feeding solder are installed outside the welding gun cavity 5.

[0024] In the present application, the laser generator 10 is powered to emit a light beam, which is then converted into parallel light by the collimating lens 14, and finally the light beam is focused according to the current setting position of the focusing lens 1301 to achieve high temperature welding.

[0025] In this embodiment, a plurality of limit slide grooves 15 are opened on the lower side of the inner wall of the transmitting groove 11, a plurality of limit sliders 1303 are fixedly installed on the outer side of the focusing cylinder 13, the limit sliders 1303 slide in cooperation with the limit slide grooves 15, and a plurality of transmission racks 1304 are arranged on the outer surface of the focusing cylinder 13.

[0026] In this embodiment, the feeding assembly 8 includes a material storage trough 804, which is opened on the upper side of the welding gun chamber 5. A plurality of material delivery pipes 802 are installed outside the material storage trough 804, and each material delivery pipe 802 is connected to the material storage box through a delivery pump.

[0027] A rotating ring 805 is rotatably mounted on the upper side of the material storage trough 804, a spiral blade 8051 for controlling the amount of material discharged is fixedly mounted on the bottom of the rotating ring 805, an extended boss 8052 is fixedly mounted on the upper end of the rotating ring 805, and a plurality of matching tooth grooves 8053 are formed on the upper surface of the extended boss 8052; An upper mounting groove 801 is provided on the upper side of the material storage groove 804 , a driving motor 803 is fixedly installed inside the upper mounting groove 801 , a transmission gear 8031 ​​is fixedly installed at the output end of the driving motor 803 , and the transmission gear 8031 ​​meshes with the matching tooth groove 8053 .

[0028] By starting the driving motor 803, the transmission gear 8031 ​​can be driven to rotate continuously. During the rotation of the transmission gear 8031, the meshing transmission between the transmission gear 8031 ​​and the matching tooth groove 8053 is used to rotate the extension boss 8052 and drive the rotating ring 805 to rotate continuously. The rotating ring 805 is driven to rotate by the above structure so that the spiral blade 8051 below it rotates with it. The spiral blade 8051 is arranged inside the storage tank 804, so that the amount of solder falling inside the storage tank 804 can be controlled to ensure that the solder is discharged more evenly, avoiding the problem of solder discharge blockage or unevenness. Before welding, several material delivery pipelines 802 need to be connected to the delivery pump on the material storage box to achieve stable continuous feeding operation.

[0029] In the present application, the discharge assembly 6 includes a plurality of receiving grooves 601, and the plurality of receiving grooves 601 are respectively opened on the lower side of the inner part of the welding gun cavity 5, and a sealing rotating seat 603 is arranged at the bottom of each receiving groove 601, and a sealing ball seat 602 is movably arranged inside the sealing rotating seat 603, and a centralizing hopper 6021 for gathering materials is arranged at the upper end of the sealing ball seat 602, and a material guide pipe 6022 for discharging materials is arranged at the lower end of the sealing ball seat 602, and a discharge channel 6023 is opened inside the sealing ball seat 602; The upper ends of the receiving grooves 601 are respectively communicated with the material storage grooves 804 , and the inner walls of the receiving grooves 601 are installed with fixing rings 6011 , and the bottom of the fixing rings 6011 is installed with rubber soft sleeves 6012 , and the rubber soft sleeves 6012 are connected to the upper end of the centralized hopper 6021 .

[0030] In order to match the focus position for the corresponding discharge operation, the sealing ball seat 602 is movably arranged in the sealing rotating seat 603, so that the angle of the guide tube 6022 can be adjusted. In order to avoid the interference of the discharge of the guide tube 6022 due to the angle adjustment, the present application can gather the protective gas and the solder together through the centralized hopper 6021, which not only ensures the discharge of the material, but also allows the protective gas to take out the solder together when discharging, and avoids the interference of the discharge while making the discharge strength able to discharge the solder to the corresponding range; In addition, a rubber soft sleeve 6012 is provided between the fixing ring 6011 and the central hopper 6021, so that the falling materials can be discharged stably to avoid material leakage.

[0031] It should be noted that a spiral channel 902 is provided inside the welding gun cavity 5, and the spiral channel 902 surrounds the outside of the focusing cylinder 13. An air inlet channel 901 is provided at the upper end of the spiral channel 902, and an air connection pipe 9 for connecting an air pump is fixedly installed at the outer end of the air inlet channel 901; An exhaust pipe 903 is installed on the inner wall of each receiving trough 601 , and a plurality of channels are opened at the lower end of the spiral channel 902 to connect with the corresponding exhaust pipes 903 . Each exhaust pipe 903 has an exhaust port inclined to be close to the concentrated hopper 6021 .

[0032] By connecting the air pump for delivering the protective gas through the air connecting pipe 9, the protective gas can stably enter the air inlet channel 901, and fall along the spiral channel 902 after entering. In this process, the temperature of the current focusing cylinder 13 can be taken away by the protective gas, so as to avoid serious heat accumulation inside the focusing cylinder 13, so that the present application can be welded for a long time. Then the protective gas will be discharged from the exhaust pipe 903, and when discharged, it will take away the solder at the current concentrated hopper 6021, so that the solder and gas are discharged together, ensuring that the gas is located at the solder.

[0033] In the present application, the proofreading assembly 7 includes an expansion ring 701, and a plurality of infrared sensors 702 for detecting the depth of the pit are installed at the bottom of the expansion ring 701. A lower mounting groove 703 is provided on the lower side of the outer wall of the welding gun cavity 5. A synchronous controller 704 for controlling the welding position is installed inside the lower mounting groove 703. The synchronous controller 704 is connected to the infrared sensor 702 through a cable.

[0034] It should be noted that an electric control push rod 705 is installed inside the lower mounting slot 703, and the electric control push rod 705 is connected to the synchronization controller 704 through a cable. A synchronization through hole 706 is opened on one side of the inner wall of the transmitting slot 11, and a transmission connecting rod 707 is movably installed inside the synchronization through hole 706. One end of the transmission connecting rod 707 is connected to the focusing cylinder 13, and the other end of the transmission connecting rod 707 is connected to the output end of the electric control push rod 705.

[0035] During welding, the front end pit can be detected by the infrared sensor 702. After the pit depth is detected, the data is transmitted to the synchronous controller 704, and the electric control push rod 705 is controlled so that the output end of the electric control push rod 705 extends to the corresponding length. When the electric control push rod 705 extends, it will drive the transmission connecting rod 707 and the focusing cylinder 13 to move, wherein the limit slider 1303 is slidably matched with the limit slide groove 15 to realize the position movement of the focusing cylinder 13, so that the focusing cylinder 13 can adjust the distance between the focusing lens 1301 and the collimating lens 14, so as to adjust the welding position. The above structure can enable the present application to adjust the welding position in time according to the pit depth during welding, so as to ensure that the temperature of laser welding remains consistent and the effect after welding is ensured.

[0036] In the specific setting, a driven tooth groove 6024 is opened on one side of each sealing ball seat 602, and a transmission groove 604 is opened inside the welding gun cavity 5. A driven gear 6041 and a synchronous gear 6042 that mesh with each other are rotatably installed inside the transmission groove 604. The synchronous gear 6042 meshes with the driven tooth groove 6024, and the driven gear 6041 meshes with the transmission rack 1304.

[0037] By moving the focusing cylinder 13, the transmission rack 1304 moves up and down, and the transmission rack 1304 is meshed with the driven gear 6041 to realize power transmission. In order to synchronize the focusing position, the synchronization gear 6042 is meshed with the driven tooth groove 6024. When the welding position rises, the outer material guide tube 6022 will also flip inward, so that the material discharged by the material guide tube 6022 coincides with the welding focal point, thereby realizing high-precision welding. Compared with the fixed discharge position, part of the solder will spread outward, which will not only make the amount of solder falling on the welding point uncontrollable and cause insufficient welding strength, but also the solder will scatter to the periphery of the welding point, causing the blade surface to require additional grinding.

[0038] The working principle of this steam turbine blade welding device: When in use, first place the movable mold of the fixed blade under the column 1, then start the electric guide rail 2 to drive the slide 3 to move to the initial welding position, then power the laser generator 10 to enable it to emit a light beam, then the light beam will be converted into parallel light under the action of the collimator 14, and finally the light beam will be focused according to the current setting position of the focusing mirror 1301 to achieve high temperature welding; During the welding process, the movable mold will cooperate with the electric guide rail 2 so that the blade welding position is always located below the welding gun cavity 5; Then, the driving motor 803 is started to drive the transmission gear 8031 ​​to rotate continuously. During the rotation of the transmission gear 8031, the meshing transmission between the transmission gear 8031 ​​and the matching tooth groove 8053 is used to rotate the extension boss 8052, and drive the rotating ring 805 to rotate continuously. The rotating ring 805 is driven to rotate by the above structure so that the spiral blade 8051 below it rotates with it, thereby realizing the replenishment of solder. In this process, the air pump for delivering the protective gas is connected through the air connection pipe 9, so that the protective gas can stably enter the air inlet channel 901, and then fall along the spiral channel 902 after entering, and then the protective gas will be discharged from the exhaust pipe 903, and when discharged, it will take away the solder at the current concentrated hopper 6021 to realize the discharge of the solder and the gas together; During welding, the front end pit can be detected by the infrared sensor 702. After the pit depth is detected, the data is transmitted to the synchronous controller 704, and the electric control push rod 705 is controlled so that the output end of the electric control push rod 705 is extended to the corresponding length. When the electric control push rod 705 is extended, the transmission connecting rod 707 and the focusing cylinder 13 are driven to move, wherein the limit slider 1303 is slidably matched with the limit slide groove 15 to realize the position movement of the focusing cylinder 13, so that the focusing cylinder 13 can adjust the distance between the focusing lens 1301 and the collimating lens 14, so as to realize the adjustment of the welding position; When adjusting the welding position, the transmission rack 1304 moves up and down, and is meshed with the driven gear 6041 to realize power transmission. In order to synchronize the focusing position, the synchronous gear 6042 is meshed with the driven tooth groove 6024. When the welding position rises, the outer material guide tube 6022 will also flip inward, so that the material discharged by the material guide tube 6022 coincides with the welding focal point, thereby ensuring the welding quality.

[0039] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A steam turbine blade welding device, comprising two columns (1), characterized in that: An electric guide rail (2) is fixedly installed between the two columns (1); a slide seat (3) is slidably installed at the bottom of the electric guide rail (2); a fixed bracket (4) is installed at the bottom of the slide seat (3); a welding gun chamber (5) is fixedly installed at one end of the fixed bracket (4); a launch slot (11) is provided at the center of the welding gun chamber (5); a laser generator (10) is fixedly installed at the upper end of the launch slot (11); a focusing cylinder (13) is provided at the lower end of the launch slot (11); a focusing lens (1301) and a protective lens (1302) are respectively installed inside the focusing cylinder (13); a placement cylinder (12) is installed in the middle of the launch slot (11); a collimating lens (14) is installed inside the placement cylinder (12); A discharge assembly (6) for discharging solder and protective gas is installed at the bottom of the welding gun cavity (5), and a calibration assembly (7) for detecting the depth of the pit and a feeding assembly (8) for feeding solder are installed outside the welding gun cavity (5).

2. A steam turbine blade welding device according to claim 1, characterized in that: A plurality of limit slide grooves (15) are provided on the lower side of the inner wall of the emission groove (11); a plurality of limit slide blocks (1303) are fixedly mounted on the outer side of the focusing cylinder (13); the limit slide blocks (1303) are slidably engaged with the limit slide grooves (15); and a plurality of transmission racks (1304) are provided on the outer surface of the focusing cylinder (13).

3. A steam turbine blade welding device according to claim 2, characterized in that: The material feeding assembly (8) comprises a material storage trough (804), wherein the material storage trough (804) is disposed on the upper side of the interior of the welding gun chamber (5), and a plurality of material delivery pipelines (802) are installed outside the material storage trough (804), and each of the material delivery pipelines (802) is connected to a material storage box via a delivery pump.

4. A steam turbine blade welding device according to claim 3, characterized in that: A rotating ring (805) is rotatably mounted on the upper side of the material storage trough (804); a spiral blade (8051) for controlling the amount of material discharged is fixedly mounted on the bottom of the rotating ring (805); an extension boss (8052) is fixedly mounted on the upper end of the rotating ring (805); and a plurality of matching tooth grooves (8053) are formed on the upper surface of the extension boss (8052); An upper mounting groove (801) is provided on the upper side of the material storage groove (804), a driving motor (803) is fixedly mounted inside the upper mounting groove (801), a transmission gear (8031) is fixedly mounted on the output end of the driving motor (803), and the transmission gear (8031) is meshed with a matching tooth groove (8053).

5. A steam turbine blade welding device according to claim 2, characterized in that: The discharge assembly (6) comprises a plurality of receiving grooves (601), wherein the plurality of receiving grooves (601) are respectively arranged on the lower side of the interior of the welding gun chamber (5), a sealing rotating seat (603) is arranged at the bottom of each receiving groove (601), a sealing ball seat (602) is movably arranged inside the sealing rotating seat (603), a collecting hopper (6021) for gathering materials is arranged at the upper end of the sealing ball seat (602), a material guide pipe (6022) for discharging materials is arranged at the lower end of the sealing ball seat (602), and a discharge channel (6023) is arranged inside the sealing ball seat (602).

6. A steam turbine blade welding device according to claim 5, characterized in that: The upper ends of the plurality of receiving grooves (601) are respectively communicated with the material storage groove (804), and the inner walls of the plurality of receiving grooves (601) are provided with fixing rings (6011). The bottom of the fixing rings (6011) is provided with a rubber sleeve (6012), and the rubber sleeve (6012) is connected to the upper end of the centralized hopper (6021).

7. A steam turbine blade welding device according to claim 6, characterized in that: A spiral channel (902) is provided inside the welding gun cavity (5), the spiral channel (902) surrounds the outside of the focusing cylinder (13), an air inlet channel (901) is provided at the upper end of the spiral channel (902), and an air connection pipe (9) for connecting to an air pump is fixedly installed at the outer end of the air inlet channel (901); An exhaust pipe (903) is installed on the inner wall of each receiving trough (601), and a plurality of channels are opened at the lower end of the spiral channel (902) to connect with the corresponding exhaust pipes (903). Each exhaust pipe (903) has an exhaust port arranged obliquely close to the central hopper (6021).

8. The steam turbine blade welding device according to claim 5, characterized in that: The calibration component (7) comprises an expansion ring (701), a plurality of infrared sensors (702) for detecting the depth of the pit are installed at the bottom of the expansion ring (701), a lower mounting groove (703) is provided at the lower side of the outer wall of the welding gun cavity (5), a synchronous controller (704) for controlling the welding position is installed inside the lower mounting groove (703), and the synchronous controller (704) and the infrared sensor (702) are connected via a cable.

9. A steam turbine blade welding device according to claim 8, characterized in that: An electric control push rod (705) is installed inside the lower installation slot (703), and the electric control push rod (705) is connected to the synchronization controller (704) via a cable. A synchronization through hole (706) is opened on one side of the inner wall of the transmitting slot (11), and a transmission connecting rod (707) is movably installed inside the synchronization through hole (706). One end of the transmission connecting rod (707) is connected to the focusing cylinder (13), and the other end of the transmission connecting rod (707) is connected to the output end of the electric control push rod (705).

10. The steam turbine blade welding device according to claim 5, characterized in that: A driven tooth groove (6024) is provided on one side of each sealing ball seat (602), a transmission groove (604) is provided inside the welding gun chamber (5), and a driven gear (6041) and a synchronous gear (6042) are rotatably mounted inside the transmission groove (604), the synchronous gear (6042) meshes with the driven tooth groove (6024), and the driven gear (6041) meshes with the transmission rack (1304).

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