Cartridge receiver welding device and using method thereof

Abstract

A casing welding device comprises a positioning base, a positioning cover plate, an inner supporting plate, a positioning ring and a front casing. The bottom of the outer wall is connected with the top of the positioning base, the bottom of the inner wall is connected with the top of the positioning base, the top of the outer wall is connected with the bottom of the positioning cover plate, and the inner wall is embedded in a cavity in the center of the positioning cover plate; a plurality of inner supporting wedge-shaped blocks are arranged at the lower end of the inner side wall of the inner wall in a surrounding mode, inner supporting circular plates are arranged between the inner supporting wedge-shaped blocks, a positioning ring is arranged at the position, located above the inner supporting circular plates, of the inner side wall of the inner wall, and the side face of an arc-shaped supporting anti-deformation supporting base is connected with the outer side wall of the inner wall. The side face of the arc-shaped supporting anti-deformation expansion block is connected with the inner side of the outer wall, and the arc-shaped supporting anti-deformation wedge-shaped plate is embedded between the arc-shaped supporting anti-deformation supporting base and the arc-shaped supporting anti-deformation expansion block. Deformation can be controlled in the welding process, and machining is convenient.

Description

Technical Field

[0001] The invention relates to an improvement of casing welding technology, belongs to the field of casing processing, and in particular to a casing welding device and a use method thereof. Background Art

[0002] Gas turbines are widely used in ship power, natural gas pipeline transportation, offshore platform power stations, peak-shaving power generation in small and medium-sized cities, etc. as power output equipment and power generation equipment. Gas turbines can be roughly divided into three types of parts: casing parts, blade parts, and disk and shaft parts. Casing parts are the support and key load-bearing parts of gas turbine devices. They withstand high temperatures, with the highest operating temperature reaching 1000°C. They play a key role in the impact and vibration resistance of the whole machine. Casing parts are one of the most difficult types of parts to manufacture in gas turbines. The front casing is one of the main components of gas turbine casing parts and is the main component of the air intake end. It has a complex structure and high part precision requirements. During welding, there are many welding bosses and ribs on the outer wall, and the welding amount is large. The front casing has a thin wall thickness and poor rigidity. Deformation problems often occur during welding.

[0003] A Chinese patent application with application number CN202211644277.9 and application date December 20, 2022 discloses a casing, comprising a core casing and a diverter rear ring, wherein the core casing comprises a diverter front ring, an inner casing and a support plate, one end of the diverter front ring is connected to one end of the diverter rear ring, and the other end of the diverter front ring is provided with an inner casing and a support plate, and a connecting mandrel is provided on the core casing, one end of the connecting mandrel is connected to the diverter front ring, and the other end of the connecting mandrel is connected to the diverter rear ring, wherein the inner sleeve, inner casing, support plate, diverter front ring and outer ring are welded into a core casing, and the diverter rear ring and the diverter front ring of the core casing are welded. The above scheme reduces the circular runout tolerance value of the thin-walled casing after welding, but does not solve the problem of deformation that is prone to occur during the casing welding process.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of this patent application, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to ordinary technicians in this field. Summary of the invention

[0005] The purpose of the present invention is to overcome the problem of deformation easily occurring during welding in the prior art, and to provide a casing welding device capable of controlling deformation during welding and a method for using the same.

[0006] To achieve the above objectives, the technical solution of the present invention is: a casing welding device, the casing welding device comprises a positioning base, a positioning cover plate, an inner support plate, and a positioning ring; The top of the positioning base is connected to the bottom of the outer wall, the top of the positioning base is connected to the bottom of the inner wall, the bottom of the positioning cover is connected to the top of the outer wall, and the inner wall is embedded in the cavity in the center of the positioning cover; The inner wall and the outer wall are connected by three groups of first columns and three groups of second columns respectively, and the three groups of first columns and the three groups of second columns are staggered; The outer side of the outer wall is surrounded by an outer part, and the outer part includes a rib plate, a first boss, a second boss and a cylinder which are sequentially surrounded; The positioning base and the positioning cover plate are connected by multiple groups of wedge-shaped connecting rods; The bottom side of the outer wall is embedded in a plurality of first positioning stoppers on the positioning base, the top side of the outer wall is embedded in a plurality of second positioning stoppers on the positioning cover plate, one end of a plurality of first wedge-shaped rods penetrates the positioning cover plate and is fixed to the top of the outer wall, and one end of a plurality of second wedge-shaped rods penetrates the positioning base and is fixed to the bottom of the outer wall; A plurality of inner supporting wedge blocks are arranged around the lower end of the inner side of the inner wall, an inner supporting circular plate is arranged between all the inner supporting wedge blocks, a positioning ring is arranged on the inner side of the inner wall above the inner supporting circular plate, the side surface of the arc-shaped support anti-deformation support seat is connected to the outer side of the inner wall, the side surface of the arc-shaped support anti-deformation expansion block is connected to the inner side of the outer wall, and the arc-shaped support anti-deformation wedge plate is embedded between the arc-shaped support anti-deformation support seat and the arc-shaped support anti-deformation expansion block.

[0007] The side thread of the positioning ring is matched with a hook-type screw, and the upper end of the hook-type screw is in contact with the inner side of the inner wall.

[0008] The top of the positioning cover plate is located on the side of the wedge-shaped connecting rod and is provided with a wedge-shaped connecting block, and the height of the wedge-shaped connecting block increases gradually from the outer wall to the inner wall.

[0009] The top of the positioning cover plate is located at the side of the first wedge rod and is provided with a first wedge block, and the height of the first wedge block decreases from the outer wall to the inner wall.

[0010] A first pressing plate is arranged at the bottom of the positioning cover plate, one end of the first pressing plate is connected to the top side enclosure of the outer wall, and one end of the first wedge-shaped rod passes through the positioning cover plate and the first pressing plate in sequence and is fixed to the first pressing plate.

[0011] The top of the positioning base is located at the side of the second wedge rod and is provided with a second wedge block, and the height of the second wedge block decreases from the outer wall to the inner wall.

[0012] A second pressing plate is arranged on the top of the positioning base, one end of the second pressing plate is connected to the top side enclosure of the outer wall, and one end of the first wedge-shaped rod passes through the positioning base and the second pressing plate in sequence and is fixed to the second pressing plate.

[0013] A method for using a casing welding device, the method for using the casing welding device comprising the following steps: The first step is to align the engraved lines to assemble the outer parts, which include the first boss, the second boss, the rib plate, and the cylinder. Then, argon arc welding is used to position and weld the assembled outer parts. Then, the arc support anti-deformation support seat and the arc support anti-deformation expansion block are radially positioned through the stopper on the positioning base. Then, the arc support anti-deformation support seat is fixed with screws. Then, all the wedge-shaped connecting rods are inserted into the U-shaped groove on the positioning base. Then, the second wedge rod is inserted through the through hole on the back of the positioning base for fixing. Then, the outer wall is fixed to the positioning cover plate through the first wedge rod. Then, the sequence positioning ring is installed on the inner hole step of the inner wall. Then, the arc support anti-deformation wedge plate is driven into the groove body between the arc support anti-deformation support seat and the arc support anti-deformation expansion block until the arc support anti-deformation expansion block is tightly attached to the inner wall and the outer wall. Then, the parts are hoisted and turned over. The supporting wedge block and the inner support circular plate are installed into the inner hole of the inner wall of the part from the middle hole of the positioning base and fixed. At this time, the assembly of the parts to be processed is completed. The second step is to hoist the parts to be processed into the welding water tank as a whole, observe the surface quality of the parts to be processed, and grind the parts that do not meet the requirements to obtain the parts to be processed after grinding; The third step is to weld the parts to be processed after grinding. First, weld the locations with more welds between the ribs, bosses and outer walls, and then weld the locations with fewer welds on the inner and outer walls. Each weld is welded in multiple layers and multiple passes until all the welds on the entire receiver are completed. Then, grind and anneal to obtain the final receiver components.

[0014] Each weld is welded by multi-layer and multi-pass welding, specifically: after welding one part, the angle of the entire casing is rotated, and the rib plate and boss of the next part are welded.

[0015] The third step also includes correction between the completion of welding and the re-grinding of the welds, specifically: first remove the arc support anti-deformation wedge plate, the arc support anti-deformation support seat, and the arc support anti-deformation expansion block, then turn the parts upside down, remove the positioning base, positioning cover plate and all the parts installed on it, and then measure the inner hole diameter and height of the top and bottom of the outer wall, and handle the parts that do not meet the requirements according to the actual status.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In a casing welding device and a method for using the same, the side of the arc-shaped support anti-deformation support seat is connected to the outer side of the inner wall, the side of the arc-shaped support anti-deformation expansion block is connected to the inner side of the outer wall, and the arc-shaped support anti-deformation wedge plate is embedded between the arc-shaped support anti-deformation support seat and the arc-shaped support anti-deformation expansion block. When used, the arc-shaped support anti-deformation wedge plate is inserted between the arc-shaped support anti-deformation support seat and the arc-shaped support anti-deformation expansion block to form an internal support anti-deformation device as a whole. The internal support anti-deformation device is distributed between the inner wall and the outer wall. The arc-shaped support anti-deformation support seats and the arc-shaped support anti-deformation expansion blocks at both ends provide support to the inner wall and the outer wall respectively, so that the degree of deformation of the front casing can be controlled during welding. Therefore, the deformation can be controlled during welding of the present invention, and the processing is convenient.

[0017] 2. In a casing welding device and a method for using the same, the bottom side of the outer wall is embedded in a plurality of first positioning stoppers on a positioning base, the top side of the outer wall is embedded in a plurality of second positioning stoppers on a positioning cover plate, one end of a plurality of first wedge-shaped rods penetrates the positioning cover plate and is fixed to the top of the outer wall, and one end of a plurality of second wedge-shaped rods penetrates the positioning base and is fixed to the bottom of the outer wall. When used, the inner support anti-deformation device adopts a self-locking form of a wedge-shaped plate, which solves the problem of easy deformation when tightened with screws, improves welding efficiency, and further reduces the occurrence of welding deformation. Therefore, the present invention further reduces welding deformation and improves welding efficiency.

[0018] 3. In the casing welding device and the use method of the present invention, after the parts are assembled, welding is performed in a water tank. The good heat transfer of the water can significantly reduce the temperature of the parts, effectively reduce the casing welding deformation, and reduce the number of reworks of the front casing. Secondly, a reasonable welding process is adopted, and the interlayer temperature and welding sequence during the welding process are strictly controlled, thereby improving the yield rate of the device. Therefore, the present invention reduces the number of reworks of the front casing and improves the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2 It is a top view of the present invention.

[0021] Figure 3 It is a combined state diagram of the present invention.

[0022] Figure 4 The present invention Figure 3 Top view of the .

[0023] Figure 5 It is a schematic diagram of the connection between the arc-shaped support anti-deformation support seat and the arc-shaped support anti-deformation expansion block in the present invention.

[0024] In the figure: positioning base 1, second wedge block 11, second pressure plate 12, arc-shaped support anti-deformation support seat 13, arc-shaped support anti-deformation wedge plate 14, arc-shaped support anti-deformation expansion block 15, hook screw 16, wedge-shaped connecting block 17, wedge-shaped connecting rod 2, positioning cover plate 3, inner support wedge block 4, inner support plate 5, positioning ring 6, first wedge rod 7, first wedge block 8, first pressure plate 9, second wedge rod 10, inner wall 20, outer wall 30, first column 40, second column 50, rib plate 60, first boss 70, cylinder 80, second boss 90. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] See also Figures 1 to 5 , a casing welding device, the casing welding device comprising a positioning base 1, a positioning cover plate 3, an inner support plate 5, and a positioning ring 6; The top of the positioning base 1 is connected to the bottom of the outer wall 30, the top of the positioning base 1 is connected to the bottom of the inner wall 20, the bottom of the positioning cover plate 3 is connected to the top of the outer wall 30, and the inner wall 20 is embedded in the cavity in the center of the positioning cover plate 3; The inner wall 20 and the outer wall 30 are connected by three groups of first columns 40 and three groups of second columns 50, respectively. The three groups of first columns 40 and the three groups of second columns 50 are staggered. The outer side of the outer wall 30 is surrounded by an outer part, and the outer part includes a rib plate 60, a first boss 70, a second boss 90 and a cylinder 80 which are sequentially surrounded. The positioning base 1 and the positioning cover plate 3 are connected by multiple groups of wedge-shaped connecting rods 2; The bottom side of the outer wall 30 is embedded in the multiple first positioning stoppers 101 on the positioning base 1, and the top side of the outer wall 30 is embedded in the multiple second positioning stoppers 301 on the positioning cover plate 3. One end of the multiple first wedge-shaped rods 7 passes through the positioning cover plate 3 and is fixed to the top of the outer wall 30, and one end of the multiple second wedge-shaped rods 10 passes through the positioning base 1 and is fixed to the bottom of the outer wall 30. A plurality of inner supporting wedge blocks 4 are arranged around the lower end of the inner side of the inner wall 20, an inner supporting circular plate 5 is arranged between all the inner supporting wedge blocks 4, a positioning ring 6 is arranged on the inner side of the inner wall 20 and located above the inner supporting circular plate 5, the side of the arc-shaped support anti-deformation support seat 13 is connected to the outer side of the inner wall 20, the side of the arc-shaped support anti-deformation expansion block 15 is connected to the inner side of the outer wall 30, and the arc-shaped support anti-deformation wedge plate 14 is embedded between the arc-shaped support anti-deformation support seat 13 and the arc-shaped support anti-deformation expansion block 15.

[0027] The side thread of the positioning ring 6 is matched with a hook screw 16 , and the upper end of the hook screw 16 is in contact with the inner side of the inner wall 20 .

[0028] A wedge-shaped connection block 17 is disposed on the top of the positioning cover plate 3 and on the side of the wedge-shaped connection rod 2 . The height of the wedge-shaped connection block 17 increases gradually from the outer wall 30 to the inner wall 20 .

[0029] A first wedge block 8 is disposed on the top of the positioning cover plate 3 and around the first wedge rod 7 . The height of the first wedge block 8 decreases from the outer wall 30 to the inner wall 20 .

[0030] A first pressing plate 9 is provided at the bottom of the positioning cover plate 3, one end of the first pressing plate 9 is connected to the top side of the outer wall 30, and one end of the first wedge rod 7 passes through the positioning cover plate 3 and the first pressing plate 9 in sequence and is fixed to the first pressing plate 9.

[0031] A second wedge block 11 is disposed on the top of the positioning base 1 and around the second wedge rod 10 . The height of the second wedge block 11 decreases from the outer wall 30 to the inner wall 20 .

[0032] A second pressing plate 12 is provided on the top of the positioning base 1 , one end of the second pressing plate 12 is connected to the top side of the outer wall 30 , and one end of the first wedge rod 7 passes through the positioning base 1 and the second pressing plate 12 in sequence and is fixed to the second pressing plate 12 .

[0033] A method for using a casing welding device, the method for using the casing welding device comprising the following steps: The first step is to align the engraved lines and assemble the outer parts, which include the first boss 70, the second boss 90, the rib plate 60, and the cylinder 80. Then, argon arc welding is used to position and weld the assembled outer parts. Then, the arc support anti-deformation support seat 13 and the arc support anti-deformation expansion block 15 are radially positioned through the stopper on the positioning base 1. Then, the arc support anti-deformation support seat 13 is fixed with screws. Then, all the wedge-shaped connecting rods 2 are inserted into the U-shaped groove on the positioning base 1. Then, the second wedge rod 10 is inserted into the through hole on the reverse side of the positioning base 1. The outer wall 30 is fixed on the positioning cover plate 3 by the first wedge rod 7, and then the sequence positioning ring 6 is installed on the inner hole step of the inner wall 20, and then the arc-shaped support anti-deformation wedge plate 14 is driven into the groove body between the arc-shaped support anti-deformation support seat 13 and the arc-shaped support anti-deformation expansion block 15, until the arc-shaped support anti-deformation expansion block 15 is tightly attached to the inner wall 20 and the outer wall 30, and then the parts are hoisted and turned over, and the supporting wedge block 4 and the inner supporting circular plate 5 are installed into the inner hole of the inner wall of the part from the middle hole of the positioning base 1, and fixed, and the assembly of the parts to be processed is completed at this time; The second step is to hoist the parts to be processed into the welding water tank as a whole, observe the surface quality of the parts to be processed, and grind the parts that do not meet the requirements to obtain the parts to be processed after grinding; The third step is to weld the parts to be processed after grinding. First, weld the locations with more welds between the rib plate 60, the boss and the outer wall 30, and then weld the locations with fewer welds on the inner wall 20 and the outer wall 30. Each weld is welded in multiple layers and multiple passes until all the welds on the entire casing are completed. Then, grind and anneal to obtain the final casing parts.

[0034] In the third step, each weld is welded by multi-layer and multi-pass welding, specifically: after welding one part, the angle of the entire casing is rotated, and the rib plate 60 and the boss of the next part are welded.

[0035] The third step also includes correction between the completion of welding and the re-grinding of the welds, specifically: first remove the arc support anti-deformation wedge plate 14, the arc support anti-deformation support seat 13, and the arc support anti-deformation expansion block 15, then turn the parts upside down, remove the positioning base 1, the positioning cover plate 3 and all the parts installed thereon, and then measure the inner hole diameter and height of the top and bottom of the outer wall 30, and deal with the parts that do not meet the requirements according to the actual state.

[0036] The supplementary description of the present invention is as follows: During welding, first weld the parts with a large number such as the rib plate 60 and the boss, and then weld the parts with a small number of parts. The welding is completed in multiple stages. After welding one part, turn the entire casing and weld the next rib plate 60 and the boss. The welding is completed in multiple stages to avoid deformation caused by excessive temperature between layers when the welding is completed in one go.

[0037] Embodiment 1: A casing welding device, the casing welding device comprises a positioning base 1, a positioning cover plate 3, an inner support plate 5 positioning ring 6, an inner wall 20 and an outer wall 30; the inner wall 20 and the outer wall 30 are connected by three groups of first columns 40 and three groups of second columns 50 respectively, and the three groups of first columns 40 and the three groups of second columns 50 are staggered; the bottom of the outer wall 30 is connected to the top of the positioning base 1, the bottom of the inner wall 20 is connected to the top of the positioning base 1, the top of the outer wall 30 is connected to the bottom of the positioning cover plate 3, and the inner wall 20 is embedded in the cavity in the center of the positioning cover plate 3; the outer side of the outer wall 30 is surrounded by an outer part, and the outer part includes a rib plate 60, a first boss 70, a second boss 90 and a cylinder 80 arranged in sequence; the positioning base 1 and the positioning cover plate 3 are connected by multiple groups of wedge-shaped connecting rods 2; the bottom side of the outer wall 30 is embedded A plurality of first positioning stops 101 are arranged on the positioning base 1, and the top side of the outer wall 30 is embedded in a plurality of second positioning stops 301 on the positioning cover plate 3. One end of a plurality of first wedge rods 7 passes through the positioning cover plate 3 and is fixed to the top of the outer wall 30, and one end of a plurality of second wedge rods 10 passes through the positioning base 1 and is fixed to the bottom of the outer wall 30; a plurality of inner supporting wedge blocks 4 are arranged around the lower end of the inner side of the inner wall 20, and an inner supporting circular plate 5 is arranged between all the inner supporting wedge blocks 4, and a positioning ring 6 is arranged on the inner side of the inner wall 20 above the inner supporting circular plate 5, the side of the arc-shaped support anti-deformation support seat 13 is connected to the outer side of the inner wall 20, the side of the arc-shaped support anti-deformation expansion block 15 is connected to the inner side of the outer wall 30, and the arc-shaped support anti-deformation wedge plate 14 is embedded between the arc-shaped support anti-deformation support seat 13 and the arc-shaped support anti-deformation expansion block 15.

[0038] A method for using a casing welding device, the method for using the casing welding device comprising the following steps: The first step is to align the engraved lines and assemble the outer parts, which include the first boss 70, the second boss 90, the rib plate 60, and the cylinder 80. Then, argon arc welding is used to position and weld the assembled outer parts. Then, the arc support anti-deformation support seat 13 and the arc support anti-deformation expansion block 15 are radially positioned through the stopper on the positioning base 1. Then, the arc support anti-deformation support seat 13 is fixed with screws. Then, all the wedge-shaped connecting rods 2 are inserted into the U-shaped groove on the positioning base 1. Then, the second wedge rod 10 is inserted through the through hole on the reverse side of the positioning base 1 for fixing. , and then fix the outer wall 30 on the positioning cover plate 3 through the first wedge rod 7, and then install the sequence positioning ring 6 on the inner hole step of the inner wall 20, and then drive the arc-shaped support anti-deformation wedge plate 14 into the groove between the arc-shaped support anti-deformation support seat 13 and the arc-shaped support anti-deformation expansion block 15, until the arc-shaped support anti-deformation expansion block 15 is in close contact with the inner wall 20 and the outer wall 30, and then hoist and turn the part over (90°), and install the support wedge block 4 and the inner support circular plate 5 into the inner hole of the inner wall of the part from the middle hole of the positioning base 1, and fix them, and the assembly of the parts to be processed is completed at this time; The second step is to hoist the parts to be processed into the welding water tank as a whole, observe the surface quality of the parts to be processed, and grind the parts that do not meet the requirements; The third step is to weld the parts to be processed, grind them after welding, and then anneal them. After annealing, they are calibrated to obtain the receiver parts.

[0039] When applying: An arc-shaped support anti-deformation wedge plate 14 is inserted between the arc-shaped support anti-deformation support seat 13 and the arc-shaped support anti-deformation expansion block 15, and an internal support anti-deformation device is formed between the three. The internal support anti-deformation device is distributed between the inner wall 20 and the outer wall 30, respectively providing support for the inner wall 20 and the outer wall 30, so that the front casing will not be deformed during the welding process.

[0040] Embodiment 2: Embodiment 2 is substantially the same as Embodiment 1, except that: A casing welding device, the side thread of the positioning ring 6 is matched with a hook screw 16, the upper end of the hook screw 16 is in contact with the inner side of the inner wall 20; the top of the positioning cover plate 3 is located at the side of the wedge-shaped connecting rod 2 and is provided with a wedge-shaped connecting block 17, the height of the wedge-shaped connecting block 17 increases from the outer wall 30 to the inner wall 20; the top of the positioning cover plate 3 is located at the side of the first wedge rod 7 and is provided with a first wedge block 8, the height of the first wedge block 8 decreases from the outer wall 30 to the inner wall 20; the bottom of the positioning cover plate 3 is provided with a first pressing plate 9, the first pressing plate One end of the plate 9 is connected to the top side of the outer wall 30, and one end of the first wedge rod 7 passes through the positioning cover plate 3 and the first pressure plate 9 in sequence and is fixed to the first pressure plate 9; the top of the positioning base 1 is located at the side of the second wedge rod 10 and is provided with a second wedge block 11, and the height of the second wedge block 11 decreases from the outer wall 30 to the inner wall 20; the top of the positioning base 1 is provided with a second pressure plate 12, and one end of the second pressure plate 12 is connected to the top side of the outer wall 30, and one end of the first wedge rod 7 passes through the positioning base 1 and the second pressure plate 12 in sequence and is fixed to the second pressure plate 12.

[0041] When applying: The inner support anti-deformation device is fixed to the positioning base 1 and the positioning cover plate 3 by self-locking with a wedge plate, which solves the problem of easy deformation caused by tightening with screws, improves welding efficiency, and further reduces the occurrence of welding deformation.

[0042] Embodiment 3: Embodiment 3 is substantially the same as Embodiment 1, except that: A method for using a casing welding device, the method for using the casing welding device comprising the following steps: Step 1: Observe the surface quality of the positioning weld. If there are obvious visible cracks, use a 300-500um corundum grinding wheel to grind and remove them. The minimum requirement is austenitic steel / argon arc welding / flat welding; The second step is to first align the outer wall 30 with the engraved lines to assemble the outer parts, which include the first boss 70, the second boss 90, the rib plate 60, and the cylinder 80, and then use argon arc welding to position and weld the assembled outer parts; then radially position the arc support anti-deformation support seat 13 and the arc support anti-deformation expansion block 15 through the stopper on the positioning base 1, and then fix the arc support anti-deformation support seat 13 with screws, and then insert all the wedge-shaped connecting rods 2 into the U-shaped groove on the positioning base 1, and then insert the second wedge rod 10 into the through hole on the reverse side of the positioning base 1. The outer wall 30 is fixed on the positioning cover plate 3 by the first wedge rod 7, and then the sequence positioning ring 6 is installed on the inner hole step of the inner wall 20, and then the arc-shaped support anti-deformation wedge plate 14 is driven into the groove body between the arc-shaped support anti-deformation support seat 13 and the arc-shaped support anti-deformation expansion block 15, until the arc-shaped support anti-deformation expansion block 15 is in close contact with the inner wall 20 and the outer wall 30, and then the part is hoisted and turned over 90°, and the support wedge block 4 and the inner support circular plate 5 are installed into the inner hole of the inner wall of the part from the middle hole of the positioning base 1, and fixed, and the assembly of the parts to be processed is completed at this time; The third step is to hoist the parts to be processed into the welding water tank as a whole, observe the surface quality of the parts to be processed, and grind the parts that do not meet the requirements. During grinding, use an electric corundum grinding wheel to grind the weld to remove the coarse weld nodules. During grinding, pay attention to grinding in the direction parallel to the weld, and do not allow damage to the parent material. Perform a 100% appearance inspection on all welds to ensure that there are no defects such as undercut, unfused, and cracks, and obtain the parts to be processed after grinding; The fourth step is to weld the parts to be processed after grinding. First, weld the positions with more welds between the rib plate 60, the boss and the outer wall 30, and then weld the positions with fewer welds on the inner wall 20 and the outer wall 30. Each weld is welded by multi-layer and multi-pass welding. After welding a part, rotate the angle of the entire casing to weld the next part of the rib plate 60 and the boss. Before welding the next part, use a thermometer to measure the weld temperature. After welding, use a stainless steel wire brush to clean the weld and the surrounding burrs and spatter residues until all the welds on the entire casing are welded. Then grind, and then anneal the parts together with the anti-deformation device, put them into the furnace at room temperature, and heat them to 860±10℃ with the furnace. Temperature for 2h, take out of the furnace and air cool, then remove the anti-deformation device, namely the arc-shaped support anti-deformation support seat 13, the arc-shaped support anti-deformation wedge plate 14 and the arc-shaped support anti-deformation expansion block 15, first turn the casing parts upside down, and use round steel to push out the arc-shaped support anti-deformation wedge plate 14 from the through hole on the back of the positioning base 1, and then remove the pressure plate, wedge rod, wedge block on the positioning base 1 and the positioning cover plate 3, and the positioning ring 6 of the inner hole of the inner wall 20 in turn, finally remove the positioning base 1 and the positioning cover plate 3, measure the inner hole diameter dimensions of the large end and the small end of the outer wall 30, and the height dimension, the dimensional tolerance is ±2mm, and the parts that do not meet the size are processed according to the actual state to obtain the final casing parts.

[0043] The welding requirements are as follows: welding material H0Cr20Ni10Ti diameter ф2, welding current 120-140A, welding speed 18-20cm / min, gas flow 15-20L / min, DC positive connection.

[0044] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed by the present invention should be included in the protection scope recorded in the claims.

Claims

1. A casing welding device, characterized in that: The casing welding device comprises a positioning base (1), a positioning cover plate (3), an inner support plate (5), and a positioning ring (6); The top of the positioning base (1) is connected to the bottom of the outer wall (30), the top of the positioning base (1) is connected to the bottom of the inner wall (20), the bottom of the positioning cover plate (3) is connected to the top of the outer wall (30), and the inner wall (20) is embedded in a cavity in the center of the positioning cover plate (3); The inner wall (20) and the outer wall (30) are connected respectively by three groups of first columns (40) and three groups of second columns (50), and the three groups of first columns (40) and the three groups of second columns (50) are arranged alternately; The outer side of the outer wall (30) is surrounded by an outer part, and the outer part includes a rib plate (60), a first boss (70), a second boss (90) and a cylinder (80) which are sequentially surrounded; The positioning base (1) and the positioning cover plate (3) are connected via a plurality of groups of wedge-shaped connecting rods (2); The bottom side of the outer wall (30) is embedded in a plurality of first positioning stoppers (101) on the positioning base (1), and the top side of the outer wall (30) is embedded in a plurality of second positioning stoppers (301) on the positioning cover plate (3); one end of a plurality of first wedge-shaped rods (7) passes through the positioning cover plate (3) and is fixed to the top of the outer wall (30); one end of a plurality of second wedge-shaped rods (10) passes through the positioning base (1) and is fixed to the bottom of the outer wall (30); A plurality of inner supporting wedge blocks (4) are arranged around the lower end of the inner side of the inner wall (20), an inner supporting circular plate (5) is arranged between all the inner supporting wedge blocks (4), a positioning ring (6) is arranged above the inner supporting circular plate (5) on the inner side of the inner wall (20), the side surface of the arc-shaped supporting anti-deformation support seat (13) is connected to the outer side of the inner wall (20), the side surface of the arc-shaped supporting anti-deformation expansion block (15) is connected to the inner side of the outer wall (30), and the arc-shaped supporting anti-deformation wedge plate (14) is embedded between the arc-shaped supporting anti-deformation support seat (13) and the arc-shaped supporting anti-deformation expansion block (15).

2. A casing welding device according to claim 1, characterized in that: The side thread of the positioning ring (6) is matched with a hook screw (16), and the upper end of the hook screw (16) is in contact with the inner side of the inner wall (20).

3. A casing welding device according to claim 1, characterized in that: A wedge-shaped connection block (17) is provided on the top of the positioning cover plate (3) and located on the side of the wedge-shaped connection rod (2). The height of the wedge-shaped connection block (17) increases gradually from the outer wall (30) to the inner wall (20).

4. A casing welding device according to claim 3, characterized in that: A first wedge block (8) is arranged on the top of the positioning cover plate (3) and on the side of the first wedge rod (7), and the height of the first wedge block (8) decreases from the outer wall (30) to the inner wall (20).

5. A casing welding device according to claim 4, characterized in that: A first pressing plate (9) is provided at the bottom of the positioning cover plate (3), one end of the first pressing plate (9) is connected to the top side enclosure of the outer wall (30), and one end of the first wedge-shaped rod (7) passes through the positioning cover plate (3) and the first pressing plate (9) in sequence and is fixed to the first pressing plate (9).

6. A casing welding device according to claim 1, characterized in that: A second wedge block (11) is arranged at the top of the positioning base (1) and around the second wedge rod (10), and the height of the second wedge block (11) decreases from the outer wall (30) to the inner wall (20).

7. A casing welding device according to claim 6, characterized in that: A second pressing plate (12) is arranged on the top of the positioning base (1), one end of the second pressing plate (12) is connected to the top side of the outer wall (30), and one end of the first wedge-shaped rod (7) passes through the positioning base (1) and the second pressing plate (12) in sequence and is fixed to the second pressing plate (12).

8. A method for using the casing welding device according to claim 1, characterized in that: The method for using the casing welding device comprises the following steps: The first step is to align the outer wall (30) with the engraved lines to assemble the outer parts, the outer parts including the first boss (70), the second boss (90), the rib plate (60), and the cylinder (80), and then use argon arc welding to position and weld the assembled outer parts; then the arc support anti-deformation support seat (13) and the arc support anti-deformation expansion block (15) are radially positioned through the stopper on the positioning base (1), and then the arc support anti-deformation support seat (13) is fixed with screws, and then all the wedge-shaped connecting rods (2) are inserted into the U-shaped groove on the positioning base (1), and then the second wedge rod (10) is inserted from the through hole on the reverse side of the positioning base (1) The outer wall (30) is fixed to the positioning cover plate (3) by the first wedge rod (7), and then the sequence positioning ring (6) is installed on the inner hole step of the inner wall (20), and then the arc support anti-deformation wedge plate (14) is driven into the groove body between the arc support anti-deformation support seat (13) and the arc support anti-deformation expansion block (15) until the arc support anti-deformation expansion block (15) is tightly attached to the inner wall (20) and the outer wall (30), and then the part is hoisted and turned over, and the support wedge block (4) and the inner support circular plate (5) are installed into the inner hole of the inner wall of the part from the middle hole of the positioning base (1) and fixed, and the assembly of the part to be processed is completed at this time; The second step is to hoist the parts to be processed into the welding water tank as a whole, observe the surface quality of the parts to be processed, and grind the parts that do not meet the requirements to obtain the parts to be processed after grinding; The third step is to weld the parts to be processed after grinding, first welding the positions with a large number of welds between the rib plate (60), the boss and the outer wall (30), and then welding the positions with a small number of welds on the inner wall (20) and the outer wall (30). Each weld is welded in a multi-layer and multi-pass manner until all the welds on the entire casing are welded. Then grinding is performed, and then annealing is performed to obtain the final casing parts.

9. The method for using the casing welding device according to claim 8, characterized in that: In the third step, each weld is welded by multi-layer and multi-pass welding, specifically: after welding a part, the angle of the entire casing is rotated, and the rib plate (60) and the boss of the next part are welded.

10. The method for using the casing welding device according to claim 8, characterized in that: The third step includes calibration between the completion of all welding of the welds and the re-grinding, specifically: first, the arc support anti-deformation wedge plate (14), the arc support anti-deformation support seat (13), and the arc support anti-deformation expansion block (15) are removed, and then the parts are turned upside down, and the positioning base (1), the positioning cover plate (3) and the parts installed thereon are all removed, and then the inner hole diameter and height of the top and bottom of the outer wall (30) are measured, and the parts that do not meet the requirements are processed according to the actual state.

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