Welding equipment convenient to position and used for machining steam turbine partition plate

Abstract

The invention discloses welding equipment convenient to position and used for steam turbine partition plate machining and relates to the technical field of steam turbine partition plate welding, the welding equipment comprises a bottom frame, the bottom frame is used for bearing and supporting during steam turbine partition plate machining and welding, a reinforcing rod is fixedly installed in the bottom frame, and a guide frame is fixedly installed on the side of the top of the bottom frame; a first driving screw rod is fixedly mounted in the guide frame; and the stable adjusting assembly is used for precise adjustment of the welding equipment. According to the steam turbine partition plate machining welding equipment convenient to position, most steam turbine partition plates are of thin-wall and complex structures, during welding, local high temperature can cause thermal expansion and cold contraction of materials, and large internal stress is generated. If stress is concentrated near a weak part welding seam, deformation and even cracks are easily caused. Bottom side flexible wrapping can absorb part of thermal stress through elastic deformation of the backing ring, meanwhile, uniform restraining force is formed on the bottom side of the partition plate, and warping, twisting and other deformation caused by uneven heating of the welding side are avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of steam turbine diaphragm welding technology, in particular to a steam turbine diaphragm machining welding equipment convenient to position. BACKGROUND

[0002] In the field of electric power energy, as the core power equipment, the operation efficiency and stability of steam turbine directly affect the energy conversion efficiency and production safety. The processing quality of steam turbine diaphragm, especially the welding precision, has a decisive influence on the overall performance of steam turbine, as the key component to control steam flow and ensure energy transmission between impellers.

[0003] The steam turbine diaphragm is usually composed of multiple components such as inner ring, outer ring and blade, and its structure is complex and has strict requirements on size precision and geometric tolerance. In the traditional diaphragm machining and welding process, the positioning link has always been the bottleneck restricting quality and efficiency, often causing deviation of the relative position of the blade and the diaphragm body, and then affecting the flow state of steam in the channel, resulting in the decrease of steam turbine efficiency. SUMMARY

[0004] To achieve the above purpose, the present application realizes the following technical scheme: a steam turbine diaphragm machining welding equipment convenient to position, comprising: a chassis for supporting and bearing during steam turbine diaphragm machining and welding, a reinforcing rod fixedly installed inside the chassis, a guide frame fixedly installed at the edge of the top of the chassis, and a first drive lead screw fixedly installed inside the guide frame;

[0005] A stable adjustment assembly for precise adjustment of the welding equipment is installed on the outer surface of the guide frame through the first drive lead screw;

[0006] A clamping assembly for clamping the side edges of steam turbine diaphragms of different specifications is fixedly installed at the middle of the top of the chassis and arranged above the first drive lead screw;

[0007] A chip guide support for supporting the shaft center of the steam turbine diaphragm and cleaning the slag during welding is fixedly installed at the shaft center of the clamping assembly and matched with the clamping assembly.

[0008] Preferably, the stable adjusting assembly comprises sliding frames, the surfaces of the two sliding frames are fixedly installed with sliding frames, the opposite surfaces of the top of the sliding frames are fixedly installed with cross frames, the inner part of the cross frame is fixedly installed with a second driving lead screw, the outer surface of the cross frame is slidably installed with stable sliding frames, the top of the stable sliding frame is fixedly installed with a support frame, the top of the support frame is fixedly installed with a third driving lead screw, the bottom of the support frame is fixedly installed with a vertical frame, the stable sliding frame is provided with two groups, the stable sliding frame is slidably installed on the surface of the cross frame and the vertical frame, and the surface of the stable sliding frame close to the vertical frame is fixedly installed with a welding piece. When the staff welds the steam turbine partition plate, the position between the welding piece and the steam turbine partition plate is adjusted by controlling the position of the sliding frame on the guide frame, and the position of the welding point is adjusted by the stable sliding frame sliding on the vertical frame and the cross frame, so that the welding piece accurately welds the radial welding point.

[0009] Preferably, the stable sliding frame comprises a side connecting rod, the side connecting rod is provided with two groups, the adjacent surfaces of the two groups of side connecting rods are fixedly installed with connecting rods, the inner part of the connecting rod is penetrated with a rotating rod, the surface of the rotating rod is rotatably installed with a pulley, the surface of the side connecting rod close to the connecting rod is rotatably installed with an auxiliary wheel, the pulley is slidably installed on the surface of the vertical frame and the cross frame respectively, and the side connecting rod is fixedly installed on the surface of the welding piece and the vertical frame respectively. The stable sliding frame slides on the vertical frame and the cross frame through the pulley and the auxiliary wheel, the pulley and the auxiliary wheel are installed on the surface of the side connecting rod from multiple directions, and multiple pulleys and auxiliary wheels slide on multiple sides of the vertical frame and the cross frame when sliding, so as to improve the stability of the welding piece when welding displacement.

[0010] Preferably, the welding piece comprises a positioning plate, the positioning plate is fixedly installed on the outer surface of the side connecting rod, the edge side of the outer surface of the positioning plate is fixedly installed with a mounting seat, the inner part of the mounting seat is fixedly installed with a shell, the top of the shell is fixedly installed with a connecting line, and the inner part of the shell is fixedly installed with a laser welding head. After the connecting line is connected with the line, the staff starts the laser welding head, and the steam turbine partition plate is welded by the positioning plate sliding with the stable sliding frame on the vertical frame and the cross frame.

[0011] Preferably, the clamping assembly comprises a support base, a supporting plate is fixedly installed on the top of the support base, a collecting table is arranged at the middle of the top of the supporting plate, an inclined ring is fixedly installed on the surface of the collecting table, guide grooves are arranged on the edge of the outer surface of the supporting plate, the guide grooves are symmetrically arranged with the collecting table as the center, a clamping piece is slidably installed in the guide groove, and a bottom supporting plate is fixedly installed in the clamping piece. After the staff assembles the steam turbine partition and sets it on the upper part of the chip guide supporting piece, the staff adjusts the position of the clamping piece in the guide groove, so that the clamping piece moves to the outer side of the steam turbine partition, and at this time, the bottom supporting plate moves to the lower part of the steam turbine partition along the clamping piece to clamp and support the steam turbine partition.

[0012] Preferably, the support base is fixedly installed on the top of the base frame, the clamping pieces are provided in two, the two clamping pieces are arranged above the collecting table through the guide grooves, and the clamping pieces are arranged on the two sides of the chip guide supporting piece. During welding, the partition needs to be kept in a stable posture to ensure the welding position accuracy. The flexible coating material can assist in fixing the position of the partition in the tooling through its own adhesion and friction force, avoid displacement caused by vibration and thermal shock during welding, and ensure that the welding size meets the design requirements.

[0013] Preferably, the clamping piece comprises a semicircular ring, sliding blocks are fixedly installed on the two sides of the bottom of the semicircular ring, the sliding blocks are slidably installed in the guide groove, a limiting ring is fixedly installed on the top of the semicircular ring, a grommet is fixedly installed on the surface of the semicircular ring, and the grommet is made of high-temperature-resistant elastic material. The sliding blocks slide in the guide groove according to the diameter of the steam turbine partition, so that the grommet is coated on the outer side of the steam turbine partition. The grommet made of high-temperature-resistant elastic material has elasticity, heat insulation and deformability, and can be attached to the bottom side of the steam turbine partition. Since the steam turbine partition is mostly thin-walled and has a complex structure, local high temperature during welding can cause thermal expansion and contraction of the material, and generate a large internal stress. If the stress is concentrated near the welding seam in a weak position, deformation or even cracks are easily caused. The bottom side flexible coating can absorb part of the thermal stress through the elastic deformation of the grommet itself, and at the same time, uniform restraint force is formed on the bottom side of the partition, so as to avoid warping, twisting and other deformations caused by uneven heating of the welding side.

[0014] Preferably, the chip guide support comprises a spray bucket fixedly installed at the middle of the top of the collecting table, a bearing frame fixedly installed at the top of the spray bucket, four inner support rings fixedly installed at the middle of the top of the bearing frame, four surface-adhering pieces fixedly installed on the surfaces of the four inner support rings, a connecting ring fixedly installed at the top of the inner support ring, and a cleaning groove opened on the surface of the bearing frame and fixedly installed with a knocking flow guide outside.

[0015] Preferably, the knocking flow guide comprises an inclined plate, an outer shell fixedly installed on the outer surface of the inclined plate, a guide groove opened at the bottom of the outer shell, a rotating shaft rotatably installed in the inner part of the outer shell, a swing plate rotatably installed on the surface of the rotating shaft, a connecting arc plate fixedly installed on the outer surface of the swing plate, and a bouncing ball fixedly installed at the bottom of the connecting arc plate. Since the steam turbine diaphragm has a complex structure, there may be narrow gaps, blade steam channels and other delicate structures around the welding area. If the welding slag is not directionally scattered, it may be difficult to clean or scratch the surface of the blade. The cooling liquid is sprayed on the steam turbine diaphragm, which can quickly absorb heat by using the strong heat conductivity of the liquid, so that the welding slag is reduced from high temperature to room temperature in a few seconds, and the welding slag flows with the cooling liquid in the cleaning groove, which can forcibly guide the welding slag to the designated collecting table, avoid it from splashing to the delicate parts of the diaphragm, reduce the subsequent cleaning difficulty, and protect the geometric accuracy and flow performance of the diaphragm.

[0016] Preferably, the cleaning groove is in communication with the guide groove, the inclined plate and the outer shell are fixedly installed on the outer surface of the cleaning groove, and the swing plate and the bouncing ball are movably installed on the inner wall of the outer shell. When the cooling liquid carrying the welding slag flows from the cleaning groove to the guide groove, the cooling liquid flowing downward impacts the swing plate, so that the swing plate drives the connecting arc plate and the bouncing ball to rotate on the rotating shaft. The swing plate is made of an arc-shaped material and is downwardly offset when impacted, so as to increase the distance between the swing plate and the guide groove. Since the flow rate of the cooling liquid is not uniform, when the swing plate is not impacted by the cooling liquid, the bouncing ball drives the connecting arc plate to rotate on the rotating shaft and reset, and the bouncing ball knocks the outer shell. The elasticity of the bouncing ball makes the connecting arc plate bounce in the outer shell, so that the swing plate swings in the guide groove, thereby improving the flowability of the cooling liquid and avoiding the phenomenon of blockage during welding slag cleaning.

[0017] The present application provides a welding equipment for steam turbine diaphragm machining, which is convenient to position.

[0018] I. The welding equipment for positioning steam turbine diaphragm machining, through the sliding block according to the diameter of steam turbine diaphragm in the guide groove sliding, so that the grommet is covered on the outside of steam turbine diaphragm, the grommet of high-temperature resistant elastic material has elasticity, heat insulation and deformability, can be combined with the bottom side of steam turbine diaphragm, since steam turbine diaphragm is mostly thin-walled and complex structure, local high temperature during welding can cause material thermal expansion and cold shrinkage, generate greater internal stress. If stress is concentrated near the weld of weak part, deformation or even crack is easy to be caused. The flexible covering of bottom side can absorb part of thermal stress through the elastic deformation of grommet itself, at the same time, uniform constraint force is formed on the bottom side of diaphragm, avoid warping, distortion and other deformations caused by uneven heating of welding side.

[0019] II. The welding equipment for positioning steam turbine diaphragm machining, since steam turbine diaphragm structure is complex, narrow gap, blade steam channel and other fine structures may exist around the welding area. If welding slag is not directional, it may be stuck in the gap and difficult to clean, or scratch the surface of blade. The cooling liquid is sprayed on the steam turbine diaphragm, which can quickly absorb heat by using the strong heat conductivity of liquid, so that the welding slag is reduced from high temperature to normal temperature in a few seconds, and the welding slag flows in the cleaning groove with the cooling liquid, which can guide the welding slag to the designated collection table, avoid it to splatter to the precision part of diaphragm, reduce the difficulty of subsequent cleaning, and protect the geometric precision and flow performance of diaphragm.

[0020] III. The welding equipment for positioning steam turbine diaphragm machining, when the cooling liquid carrying welding slag flows from the cleaning groove to the guide groove, the cooling liquid flowing downward impacts the swing plate, so that the swing plate drives the connecting arc plate and the elastic ball to rotate on the rotating shaft. The swing plate is made of arc-shaped material and is offset downward when impacted, so that the distance between the swing plate and the guide groove is enlarged. Since the flow rate of the cooling liquid is not uniform, when the swing plate is not impacted by the cooling liquid, the connecting arc plate is driven by the elastic ball to rotate on the rotating shaft and reset, and the elastic ball knocks the outer shell. The elasticity of the elastic ball makes the connecting arc plate bounce on the outer shell, so that the swing plate swings in the guide groove, thereby improving the flowability of the cooling liquid and avoiding the blocking phenomenon during welding slag cleaning.

[0021] IV. The welding equipment for positioning steam turbine diaphragm machining, after the staff assembles the steam turbine diaphragm and sets it on the top of the chip removal support, the staff adjusts the position of the clamping piece in the guide groove, so that the clamping piece moves to the outside of the steam turbine diaphragm, and at this time the bottom support plate moves to the bottom of the steam turbine diaphragm with the clamping piece to clamp and support the steam turbine diaphragm. During welding, the diaphragm needs to maintain a stable posture to ensure the position accuracy of the weld. The flexible covering material can assist in fixing the position of the diaphragm in the tool through its own adhesion and friction, avoid displacement caused by vibration and thermal shock during welding, and ensure that the weld size meets the design requirements.

[0022] V. The welding equipment for steam turbine diaphragm machining is convenient to position, when a worker welds the steam turbine diaphragm, the position between the welding piece and the steam turbine diaphragm is adjusted by controlling the position of the sliding frame on the guide frame, the position of the welding point is adjusted by the stable sliding of the sliding frame on the vertical frame and the horizontal frame, so that the welding piece accurately welds the radial welding point. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is an external structure schematic diagram of the welding equipment for steam turbine diaphragm machining convenient to position;

[0024] Figure 2 It is another angle external structure schematic diagram of the welding equipment for steam turbine diaphragm machining convenient to position;

[0025] Figure 3 It is the connection structure schematic diagram of the clamping assembly and the guide frame;

[0026] Figure 4 It is the connection structure schematic diagram of the clamping assembly and the chip removal support;

[0027] Figure 5 It is the cross-section structure schematic diagram of the clamping piece;

[0028] Figure 6 It is the structure schematic diagram of the chip removal support;

[0029] Figure 7 It is the enlarged structure schematic diagram of the knocking flow guide piece;

[0030] Figure 8 It is the cross-section structure schematic diagram of the knocking flow guide piece;

[0031] Figure 9 It is the structure schematic diagram of the stable adjusting assembly and the clamping assembly;

[0032] Figure 10 It is the structure schematic diagram of the stable adjusting assembly and the guide frame;

[0033] Figure 11 It is the structure schematic diagram of the welding piece;

[0034] Figure 12 It is the enlarged structure schematic diagram of the stable sliding frame;

[0035] Figure 13 It is the disassembly structure schematic diagram of the welding piece;

[0036] In the diagram: 1. Guide frame; 2. Clamping assembly; 21. Support base; 22. Bottom support plate; 23. Inclined ring; 24. Stabilizing support plate; 25. Guide groove; 26. Collection platform; 27. Clamping component; 271. Slider; 272. Semicircular ring; 273. Washer ring; 274. Limiting ring; 3. Chip guide support component; 31. Spray tank; 32. Inner support ring; 33. Connecting ring; 34. Adhesive piece; 35. Cleaning groove; 36. Impact guide component; 361. Inclined plate; 362. Outer shell; 363. Swing plate; 364. Guide groove; 365. Rotating shaft; 366. Ball. 367. Connecting arc plate; 37. Bearing frame; 4. Stabilizing adjustment assembly; 41. Sliding frame; 42. Second drive screw; 43. Stabilizing slide; 431. Connecting rod; 432. Side connecting rod; 433. Auxiliary wheel; 434. Pulley; 435. Rotating rod; 44. Third drive screw; 45. Welded component; 451. Positioning plate; 452. Housing; 453. Mounting base; 454. Laser welding head; 455. Connecting line; 46. Sliding frame; 47. Vertical frame; 48. Horizontal frame; 49. Support frame; 5. Base frame; 6. First drive screw; 7. Reinforcing rod. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] First embodiment, such as Figures 1 to 13 As shown, the present invention provides a technical solution: a welding equipment for processing turbine partitions that is easy to position, comprising: a base frame 5, which is used for bearing support during the processing and welding of turbine partitions; a reinforcing rod 7 is fixedly installed inside the base frame 5; a guide frame 1 is fixedly installed on the side of the top of the base frame 5; and a first drive screw 6 is fixedly installed inside the guide frame 1.

[0039] A stabilizing adjustment component 4 is used for precise adjustment of the welding equipment. The stabilizing adjustment component 4 is installed on the outer surface of the guide frame 1 via a first drive screw 6.

[0040] Clamping assembly 2 is used to clamp the sides of turbine partitions of different specifications. The clamping assembly 2 is fixedly installed in the middle of the top of the base frame 5 and is mounted above the first drive screw 6.

[0041] A chip removal support 3 for supporting and cleaning molten slag during welding of the turbine diaphragm shaft, the chip removal support 3 is fixedly installed at the shaft of the clamping assembly 2, and the chip removal support 3 is matched with the clamping assembly 2.

[0042] A second embodiment, based on the first embodiment, referring to Figures 3 to 9 As shown, the stable adjusting assembly 4 comprises two sliding frames 41, the surfaces of the two sliding frames 41 are fixedly installed with sliding frames 46, the opposite surfaces of the top of the sliding frames 41 are fixedly installed with cross frames 48, the inside of the cross frames 48 is fixedly installed with second driving lead screws 42, the outer surface of the cross frames 48 is slidingly installed with stable carriages 43, the top of the stable carriages 43 is fixedly installed with support frames 49, the top of the support frames 49 is fixedly installed with third driving lead screws 44, the bottom of the support frames 49 is fixedly installed with vertical frames 47, the stable carriages 43 are provided with two groups, the two groups of stable carriages 43 are slidingly installed on the surfaces of the cross frames 48 and the vertical frames 47, and the surface of the stable carriages 43 close to the vertical frames 47 is fixedly installed with welding pieces 45. When the staff welds the turbine diaphragm, the position between the welding pieces 45 and the turbine diaphragm is adjusted by controlling the position of the sliding frames 41 on the guide frame 1, and the position of the welding points is adjusted by sliding the stable carriages 43 on the vertical frames 47 and the cross frames 48, so as to facilitate the accurate welding of the radial welding points by the welding pieces 45.

[0043] The stable carriage 43 comprises side connecting rods 432, the adjacent surfaces of the two groups of side connecting rods 432 are fixedly installed with connecting rods 431, the inside of the connecting rods 431 is penetrated by rotating rods 435, the surface of the rotating rods 435 is rotatably installed with pulleys 434, the surface of the side connecting rods 432 close to the connecting rods 431 is rotatably installed with auxiliary wheels 433, the pulleys 434 are slidingly installed on the surfaces of the vertical frames 47 and the cross frames 48 respectively, and the side connecting rods 432 are fixedly installed on the surfaces of the welding pieces 45 and the vertical frames 47 respectively. The stable carriage 43 slides on the vertical frames 47 and the cross frames 48 through the pulleys 434 and the auxiliary wheels 433, the pulleys 434 and the auxiliary wheels 433 are installed on the surface of the side connecting rods 432 from multiple directions, and multiple groups of pulleys 434 and auxiliary wheels 433 slide on multiple sides of the vertical frames 47 and the cross frames 48, so as to improve the stability of the welding piece 45 during welding displacement.

[0044] The welding piece 45 comprises a positioning plate 451 fixedly installed on the outer surface of the side connecting rod 432, an installation seat 453 fixedly installed on the edge side of the outer surface of the positioning plate 451, a shell 452 fixedly installed in the installation seat 453, a connecting wire 455 fixedly installed on the top of the shell 452, and a laser welding head 454 fixedly installed in the shell 452. After the connecting wire 455 is connected with a line, the staff starts the laser welding head 454, and the positioning plate 451 slides along with the stable sliding frame 43 on the vertical frame 47 and the horizontal frame 48 to weld the steam turbine partition plate.

[0045] The third embodiment is based on the first and second embodiments, and please refer to Figures 10 to 13 As shown in the figure, the clamping assembly 2 comprises a support seat 21, a supporting plate 24 fixedly installed on the top of the support seat 21, a collecting table 26 formed in the middle of the top of the supporting plate 24, an inclined ring 23 fixedly installed on the surface of the collecting table 26, a guide groove 25 formed in the edge side of the outer surface of the supporting plate 24, the guide grooves 25 being symmetrically arranged with the collecting table 26 as the center, a clamping piece 27 slidingly installed in the guide groove 25, and a bottom supporting plate 22 fixedly installed in the clamping piece 27. After the staff assembles the steam turbine partition plate and sets it on the upper side of the chip removal support 3, the staff adjusts the position of the clamping piece 27 in the guide groove 25, so that the clamping piece 27 moves to the outer side of the steam turbine partition plate, and at this time, the bottom supporting plate 22 moves to the lower side of the steam turbine partition plate along with the clamping piece 27, so as to clamp and support the steam turbine partition plate.

[0046] The support seat 21 is fixedly installed on the top of the base frame 5, the clamping piece 27 is provided with two, the two clamping pieces 27 are arranged above the collecting table 26 through the guide groove 25, and the clamping pieces 27 are arranged on both sides of the chip removal support 3. During welding, the partition plate needs to be kept in a stable posture to ensure the position precision of the welding seam. The flexible coating material can assist in fixing the position of the partition plate in the tooling through the adhesion and friction force of the flexible coating material, avoid displacement caused by vibration and thermal shock during the welding process, and ensure that the size of the welding seam meets the design requirements.

[0047] The clamping piece 27 comprises a semicircular ring 272, both sides of the bottom of the semicircular ring 272 are fixedly installed with sliding blocks 271, the sliding blocks 271 are slidingly installed in the inside of the guide groove 25, the top of the semicircular ring 272 is fixedly installed with a limiting ring 274, the surface of the semicircular ring 272 is fixedly installed with a gasket ring 273, and the gasket ring 273 is made of high-temperature-resistant elastic material. The sliding blocks 271 slide in the guide groove 25 according to the diameter of the turbine diaphragm, so that the gasket ring 273 is wrapped on the outer side of the turbine diaphragm. The gasket ring 273 made of high-temperature-resistant elastic material has elasticity, heat insulation and deformability, and can be attached to the bottom side of the turbine diaphragm. Since the turbine diaphragm is mostly thin-walled and has a complex structure, local high temperature during welding can cause thermal expansion and contraction of the material, resulting in a large internal stress. If the stress is concentrated near the weld of the weak part, deformation or even cracks are easily caused. The flexible wrapping on the bottom side can absorb part of the thermal stress through the elastic deformation of the gasket ring 273 itself, and at the same time form a uniform restraining force on the bottom side of the diaphragm, avoiding the deformation such as warping and twisting caused by uneven heating of the welding side.

[0048] The chip guiding support 3 comprises a spraying barrel 31 fixedly installed at the middle of the top of the collecting table 26, the spraying barrel 31 is fixedly installed with a bearing frame 37 at the top, the middle of the top of the bearing frame 37 is fixedly installed with an inner support ring 32, the inner support ring 32 is provided with four, the surface of the four inner support rings 32 is fixedly installed with a fitting piece 34, the top of the inner support ring 32 is fixedly installed with a connecting ring 33, the surface of the bearing frame 37 is provided with a cleaning groove 35, and the outer surface of the cleaning groove 35 is fixedly installed with a knocking flow guide 36. When the laser welding head 454 is welding the turbine diaphragm, the turbine diaphragm is sleeved outside the inner support ring 32, the inner support ring 32 is extruded by the turbine diaphragm to make the fitting piece 34 attached to the surface of the turbine diaphragm, so as to support and position the turbine diaphragm from the inside.

[0049] The knocking flow guide 36 comprises an inclined plate 361, an outer surface of the inclined plate 361 is fixedly provided with an outer shell 362, a bottom of the outer shell 362 is provided with a guide groove 364, an inner portion of the outer shell 362 is rotatably provided with a rotating shaft 365, a surface of the rotating shaft 365 is rotatably provided with a swing plate 363, an outer surface of the swing plate 363 is fixedly provided with a connecting arc plate 367, and a bottom of the connecting arc plate 367 is fixedly provided with a bouncing ball 366. Since the structure of the steam turbine diaphragm is complex, there may be narrow gaps, blade steam channels and other fine structures around the welding area. If the welding slag is not scattered in a certain direction, it may be difficult to clean or scratch the surface of the blade. The cooling liquid is sprayed on the steam turbine diaphragm, which can quickly absorb heat by using the strong heat conductivity of the liquid, so that the welding slag is reduced from high temperature to normal temperature in a few seconds, and the welding slag flows in the cleaning groove 35 along with the cooling liquid, so that the welding slag can be forced to be guided into the designated collection table 26, avoiding random splashing to the precise parts of the diaphragm, reducing the subsequent cleaning difficulty, and protecting the geometric precision and flow performance of the diaphragm.

[0050] The cleaning groove 35 is connected with the guide groove 364, the inclined plate 361 and the outer shell 362 are fixedly provided on the outer surface of the cleaning groove 35, and the swing plate 363 and the bouncing ball 366 are movably provided on the inner wall of the outer shell 362. When the cooling liquid carrying the welding slag flows from the cleaning groove 35 to the guide groove 364, the cooling liquid flowing downward impacts the swing plate 363, so that the swing plate 363 drives the connecting arc plate 367 and the bouncing ball 366 to rotate on the rotating shaft 365. The swing plate 363 is made of arc-shaped material and is offset downward when impacted, so that the distance between the swing plate 363 and the guide groove 364 is enlarged. Since the flow rate of the cooling liquid is not uniform, when the swing plate 363 is not impacted by the cooling liquid, the bouncing ball 366 drives the connecting arc plate 367 to rotate on the rotating shaft 365 and reset, and the bouncing ball 366 impacts the outer shell 362. The elasticity of the bouncing ball 366 makes the connecting arc plate 367 bounce on the outer shell 362, so that the swing plate 363 swings in the guide groove 364, thereby improving the flowability of the cooling liquid and avoiding the phenomenon of blockage during welding slag cleaning.

[0051] In use, after the staff assembles the steam turbine diaphragm and sets it on the upper portion of the chip guiding support 3, the staff adjusts the position of the clamping piece 27 in the guide groove 25, so that the clamping piece 27 moves to the outer side of the steam turbine diaphragm. At this time, the bottom support plate 22 moves to the lower portion of the steam turbine diaphragm along with the clamping piece 27, so as to clamp and support the steam turbine diaphragm.

[0052] During welding, the diaphragm needs to maintain a stable posture to ensure the position accuracy of the weld. The flexible coating material can assist in fixing the position of the diaphragm in the tooling through its own adhesion and friction, avoid displacement caused by vibration and thermal shock during welding, and ensure that the weld size meets the design requirements.

[0053] The slider 271 slides in the guide groove 25 according to the diameter of the turbine diaphragm, so that the gasket ring 273 is wrapped on the outer side of the turbine diaphragm. The gasket ring 273 made of high-temperature-resistant elastic material has elasticity, heat insulation and deformability, and can be attached to the bottom side of the turbine diaphragm. Since the turbine diaphragm is mostly thin-walled and has a complex structure, local high temperature during welding can cause thermal expansion and contraction of the material, resulting in a large internal stress. If the stress is concentrated near the weld in the weak part, deformation or even cracks can be easily caused. The flexible wrapping on the bottom side can absorb part of the thermal stress through the elastic deformation of the gasket ring 273 itself, and at the same time form a uniform restraining force on the bottom side of the diaphragm, avoiding the warping and distortion caused by uneven heating of the welded side.

[0054] When the workers weld the turbine diaphragm, the position between the welding part 45 and the turbine diaphragm is adjusted by controlling the position of the sliding frame 41 on the guide frame 1, and the position of the welding point is adjusted by stabilizing the sliding of the sliding frame 43 on the vertical frame 47 and the horizontal frame 48, so as to facilitate the precise welding of the radial welding points by the welding part 45.

[0055] The stable sliding frame 43 slides on the vertical frame 47 and the horizontal frame 48 through the pulley 434 and the auxiliary wheel 433, which are installed on the surface of the side connecting rod 432 from multiple directions. When multiple groups of pulleys 434 and auxiliary wheels 433 slide, they slide on multiple sides of the vertical frame 47 and the horizontal frame 48, so as to improve the stability of the welding part 45 during welding displacement.

[0056] After the connecting line 455 is connected with the line, the workers start the laser welding head 454, which slides on the vertical frame 47 and the horizontal frame 48 with the positioning plate 451 to weld the turbine diaphragm.

[0057] When the laser welding head 454 welds the turbine diaphragm, the turbine diaphragm is sleeved outside the inner supporting ring 32, the inner supporting ring 32 is pressed by the turbine diaphragm, and the adhering piece 34 is attached to the surface of the turbine diaphragm, so as to support and position the turbine diaphragm from the inside.

[0058] Due to the complex structure of the turbine diaphragm, there may be narrow gaps, blade passages and other delicate structures around the welding area. If the welding slag does not fall in a certain direction, it may be difficult to clean or scratch the surface of the blade. The cooling liquid sprayed on the turbine diaphragm can quickly absorb heat by using the strong heat conductivity of the liquid, so that the welding slag is reduced from high temperature to room temperature in a few seconds, and the welding slag flows with the cooling liquid in the cleaning groove 35, so as to forcibly guide the welding slag to the designated collection table 26, avoid it to be randomly splashed to the delicate part of the diaphragm, reduce the difficulty of subsequent cleaning, and protect the geometric precision and flow performance of the diaphragm.

[0059] When the cooling liquid carrying the welding slag flows from the cleaning tank 35 to the guide groove 364, the downward flow of the cooling liquid impacts the swing plate 363, so that the swing plate 363 drives the connecting arc plate 367 and the elastic ball 366 to rotate on the rotating shaft 365. The swing plate 363 is made of arc-shaped material and is offset downward when impacted, so that the distance between the swing plate 363 and the guide groove 364 is enlarged. Since the flow rate of the cooling liquid is uneven, when the swing plate 363 is not impacted by the cooling liquid, the connecting arc plate 367 is driven by the elastic ball 366 to rotate on the rotating shaft 365 and reset, and the elastic ball 366 knocks the outer shell 362. The elasticity of the elastic ball 366 makes the connecting arc plate 367 bounce on the outer shell 362, so that the swing plate 363 swings in the guide groove 364, thereby improving the flowability of the cooling liquid and avoiding the phenomenon of blockage during welding slag cleaning.

[0060] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... " does not, without more limitations, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0061] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A welding device for machining turbine diaphragms that facilitates positioning, characterized in that, include: The base frame (5) is used for bearing support during the processing and welding of turbine partitions. A reinforcing rod (7) is fixedly installed inside the base frame (5). A guide frame (1) is fixedly installed on the side of the top of the base frame (5). A first drive screw (6) is fixedly installed inside the guide frame (1). A stabilizing adjustment component (4) is used for precise adjustment of the welding equipment. The stabilizing adjustment component (4) is installed on the outer surface of the guide frame (1) via a first drive screw (6). Clamping assembly (2) is used to clamp the sides of turbine partitions of different specifications. The clamping assembly (2) is fixedly installed in the middle of the top of the base frame (5). The clamping assembly (2) is mounted above the first drive screw (6). Chip guide support (3) is used for supporting the turbine diaphragm shaft and cleaning slag during welding. The chip guide support (3) is fixedly installed at the shaft of the clamping assembly (2) and is adapted to the clamping assembly (2).

2. A welding apparatus for turbine diaphragm machining that facilitates positioning according to claim 1, characterized in that: The stabilizing adjustment component (4) includes a sliding frame (41), and two sliding frames (41) are provided. A sliding frame (46) is fixedly installed on the surface of each of the two sliding frames (41). A cross frame (48) is fixedly installed between the opposite surfaces of the top of the sliding frames (41). A second drive screw (42) is fixedly installed inside the cross frame (48). A stabilizing slide (43) is slidably installed on the outer surface of the cross frame (48). A support frame (49) is fixedly installed on the top of the stabilizing slide (43). A third drive screw (44) is fixedly installed on the top of the support frame (49). A vertical frame (47) is fixedly installed at the bottom of the support frame (49). Two sets of stabilizing slides (43) are provided. The two sets of stabilizing slides (43) are slidably installed on the surfaces of the cross frame (48) and the vertical frame (47). A welded part (45) is fixedly installed on the surface of the stabilizing slide (43) near the vertical frame (47).

3. A welding apparatus for turbine diaphragm machining that facilitates positioning according to claim 2, characterized in that: The stabilizing slide (43) includes a side connecting rod (432), which is provided in two sets. A connecting rod (431) is fixedly installed between the adjacent surfaces of the two sets of side connecting rods (432). A rotating rod (435) passes through the interior of the connecting rod (431). A pulley (434) is rotatably installed on the surface of the rotating rod (435). An auxiliary wheel (433) is rotatably installed on the surface of the side connecting rod (432) near the connecting rod (431). The pulley (434) is slidably installed on both sides of the surfaces of the vertical frame (47) and the horizontal frame (48), respectively. The side connecting rod (432) is fixedly installed on the surfaces of the welded part (45) and the vertical frame (47), respectively.

4. A welding apparatus for use in the fabrication of diaphragms for steam turbines which facilitates positioning as claimed in claim 3, characterized in that: The welding piece (45) comprises a positioning plate (451) fixedly installed on the outer surface of the side connecting rod (432), an installation seat (453) fixedly installed on the edge side of the outer surface of the positioning plate (451), a shell (452) fixedly installed in the installation seat (453), a connecting line (455) fixedly installed on the top of the shell (452), and a laser welding head (454) fixedly installed in the shell (452).

5. A welding apparatus for use in the fabrication of diaphragms for steam turbines which facilitates positioning as claimed in claim 4, characterized in that: The clamping assembly (2) comprises a support seat (21), a supporting plate (24) fixedly installed on the top of the support seat (21), a collecting table (26) formed in the middle of the top of the supporting plate (24), an inclined ring (23) fixedly installed on the surface of the collecting table (26), guide grooves (25) formed in the edge sides of the outer surface of the supporting plate (24), the guide grooves (25) being symmetrically arranged about the collecting table (26), and clamping pieces (27) slidably installed in the guide grooves (25).

6. A welding apparatus for turbine diaphragm machining that facilitates positioning according to claim 5, characterized in that: The support seat (21) is fixedly installed on the top of the chassis (5), the clamping pieces (27) are provided in two, the two clamping pieces (27) are arranged above the collecting table (26) through the guide grooves (25), and the clamping pieces (27) are arranged on the two sides of the chip removal support (3).

7. A welding apparatus for turbine diaphragm machining that facilitates positioning according to claim 6, characterized in that: The clamping piece (27) comprises a semicircular ring (272), sliding blocks (271) fixedly installed on the two sides of the bottom of the semicircular ring (272), the sliding blocks (271) being slidably installed in the guide grooves (25), a limiting ring (274) fixedly installed on the top of the semicircular ring (272), a gasket ring (273) fixedly installed on the surface of the semicircular ring (272), and the gasket ring (273) being made of high-temperature-resistant elastic material.

8. A welding apparatus for turbine diaphragm machining that facilitates positioning according to claim 7, characterized in that: The chip removal support (3) comprises a spraying barrel (31) fixedly installed in the middle of the top of the collecting table (26), a bearing frame (37) fixedly installed on the top of the spraying barrel (31), inner support rings (32) fixedly installed in the middle of the top of the bearing frame (37), the inner support rings (32) being provided in four, the four inner support rings (32) being fixedly installed with abutting sheets (34) on the surfaces thereof, a connecting ring (33) fixedly installed on the top of the inner support ring (32), and a cleaning groove (35) formed in the surface of the bearing frame (37) and fixedly installed with a knocking flow guide piece (36) on the outer surface thereof.

9. A welding apparatus for turbine diaphragm machining that facilitates positioning according to claim 8, characterized in that: The knocking flow guide piece (36) comprises an inclined plate (361), an outer shell (362) fixedly installed on the outer surface of the inclined plate (361), a guide groove (364) formed in the bottom of the outer shell (362), a rotating shaft (365) rotatably installed in the outer shell (362), a swing plate (363) rotatably installed on the surface of the rotating shaft (365), a connecting arc plate (367) fixedly installed on the outer surface of the swing plate (363), and a bouncing ball (366) fixedly installed on the bottom of the connecting arc plate (367).

10. A welding apparatus for use in the fabrication of diaphragms for steam turbines which facilitates positioning as claimed in claim 9, characterized in that: The cleaning groove (35) is communicated with the guide groove (364), the inclined plate (361) and the shell (362) are fixedly installed on the outer surface of the cleaning groove (35), and the swing plate (363) and the billiard ball (366) are movably installed on the inner wall of the shell (362).

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