Condenser girth welding equipment and welding process thereof

Abstract

The invention relates to the technical field of electron beam welding, in particular to condenser girth welding equipment and a welding process of the condenser girth welding equipment. The purification mechanism comprises a vertical I-shaped long plate, long shaft gears supported on the two sides of the I-shaped long plate, a screw rod supported in the middle of the I-shaped long plate, a lifter screwed and driven on the screw rod, an auxiliary actuator driven on each long shaft gear, a bin device in transmission connection between the lifter and the auxiliary actuator, and a row of lead grids mounted on each bin device; a semi-ring device used for driving the lead grating to swing in a surrounding mode is arranged on the bin device, efficient electron beam welding is conducted on a row of pipeline butt joint circular seams through the two opposite electron beam emitters, in the welding process, along with synchronous swing of the lead grating, electron beams penetrate through round holes of the lead grating and then impact on the pipeline welding butt joint positions, and the butt joint of the pipelines is completed. The lead grid absorbs X-rays generated in electron beam welding nearby.

Description

Technical Field

[0001] The invention relates to the technical field of electron beam welding, in particular to condenser annular seam welding equipment and a welding process thereof. Background Art

[0002] Electron beam welding technology uses a high-energy electron beam as a processing heat source, bombards the metal at the weld joint with a high-energy density electron beam, causes it to melt quickly, and then quickly cools it to achieve the purpose of welding. During electron beam welding, the high-speed electron beam interacts with the weld to generate X-rays. These X-rays can cause damage to the eye lens and potential harm to the skin. Long-term exposure may cause chronic radiation damage to the human body. There is a certain radiation risk to equipment operators, and special shielding measures need to be taken to protect the operators. Lead is a commonly used radiation shielding material. Due to its high density and high atomic number, it can effectively absorb X-rays. Based on the solution to the X-rays generated in electron beam welding, the present invention provides a condenser annular seam welding device and a welding process thereof. Summary of the Invention

[0003] The object of the present invention is to provide a condenser annular seam welding device and a welding process thereof to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a condenser annular seam welding device, comprising two relatively distributed electron beam emitters, a robot arm for supporting the electron beam emitters, and a purification mechanism for annular seam welding arranged between the two electron beam emitters, the purification mechanism comprising a positioned upright I-beam long plate, long shaft gears supported on both sides of the I-beam long plate, a screw supported in the middle of the I-beam long plate, a lifter screwed and driven on the screw, an auxiliary actuator driven on each long shaft gear, a bin connected by a transmission between the lifter and the auxiliary actuator, a row of lead grids installed on each bin, and a semi-ring device arranged on the bin for driving the lead grid to swing around, and the two opposite semi-ring devices are in contact and docked to form a ring body, the lead grid comprises an arc plate and a row of arc sheets integrally connected on the inner wall of the arc plate, and a circular hole for the electron beam to pass through is opened in the middle of the lead grid.

[0005] The bin includes a bin shell for placing a row of lead grids, a head shaft group and a pressing device connected to one side of the bin shell, a U-shaped push plate driven by the pressing device to push the row of lead grids, and a secondary drive shaft for establishing a transmission between the pressing device and the head shaft group. The bin shell includes an arc plate and a baffle plate vertically fixed on the edges of both sides of the arc plate. One end of the U-shaped push plate pushes a row of lead grids to move to eject and replace the lead grid clamped on the semi-ring device.

[0006] The silo shell includes a lifting seat that moves along the length direction of the I-beam long plate, a J-shaped plate supported on both sides of the lifting seat, and an amplifying group that establishes a transmission between the J-shaped plate and the I-beam long plate. The screw rod passes through the threaded hole opened on the lifting seat, and the middle long plate on the I-beam long plate slides through the plate hole opened on the lifting seat. A row of V-shaped grooves are opened on both sides of the middle long plate, and one end of the J-shaped plate is fixed to the silo shell.

[0007] The J-shaped plate slides through the plate hole opened on the lifting seat, and the lifting seat on one side of the plate hole is also provided with an empty slot for a row of teeth set on the J-shaped plate to move. The amplification group includes an amplification gear connected to a row of teeth meshing on the J-shaped plate, an amplification shaft fixed at one end of the amplification gear, a follower frame supporting the amplification shaft, a first rack connected to the fixed shaft gear meshing at one end of the amplification shaft, and a return pressure spring plate fixed at one end on the follower frame, the other end of the return pressure spring plate rests on one end of the first rack, the other end of the first rack is stuck in the V-shaped groove opened on the I-beam long plate, the first rack slides through the square hole opened on the follower frame, and one end of the follower frame is fixed on the lifting seat.

[0008] The pressing device includes a pressing frame with one end fixed on the magazine shell, a worm supported on the pressing frame, a one-way bearing with a fixed sleeve at one end of the worm, a ring plate gear with a fixed sleeve outside the one-way bearing, and a spring group driven by the other end of the worm, and the end of the auxiliary drive shaft is meshed and connected with the ring plate gear through a fixed shaft gear.

[0009] One end of the U-shaped push plate slides through the square tube fixed on the warehouse shell, and the spring group includes a side gear with a row of teeth meshing and transmission connected to the other end of the U-shaped push plate, a side shaft fixed at one end of the side gear, an outer ring gear that is also meshing and transmission connected to one side of the side gear, a center shaft arranged in the middle of the outer ring gear, a spring connected between the center shaft and the outer ring gear, a back plate fixed on the bottom surface of one side of the outer ring gear, the center shaft and the side shaft are respectively movably sleeved in two through holes opened on the hair pressing frame, and the center shaft is also movably sleeved in the through hole opened in the middle of the back plate, and the center shaft is meshed and transmission connected with the helical teeth on the worm through a fixed gear.

[0010] The head shaft group includes an L-shaped limit plate fixed on the warehouse shell, a short tail shaft and a short head shaft supported on the L-shaped limit plate, and a lap gear fixed on the short head shaft. One end of the short head shaft is meshed and connected to the annular bevel gear fixed on the short tail shaft through a fixed bevel gear. One end of the short tail shaft is coaxially fixed to the auxiliary drive shaft, and the other end of the short tail shaft is connected to the semi-ring through a fixed gear.

[0011] The auxiliary actuator includes a sub-plate frame with one end fixed on the lifting seat, an introduction shaft, a conveying shaft and a branch shaft supported on the sub-plate frame, and an introduction gear fixed at one end of the introduction shaft. One end of the conveying shaft is meshed and connected with the bevel gear fixed at one end of the branch shaft through a fixed bevel gear, and the branch shaft is meshed and connected with the overlapping gear on one side through a fixed cylinder gear. The other end of the conveying shaft is meshed and connected with the bevel gear fixed at one end of the introduction shaft through a fixed bevel gear, and the other end of the introduction shaft is meshed and connected with the long shaft gear on one side through a fixed gear.

[0012] The semi-ring device includes a semi-ring control plate with a T-shaped arc column groove provided inside, two symmetrical short convex plates fixed on the inner arc wall of the semi-ring control plate, a semi-pressure sliding column sliding through the column hole provided on the short convex plate, and a U-shaped spring piece with one end resting on the semi-pressure sliding column, and the other end of the U-shaped spring piece is fixed on the short convex plate. A hard arc plate is fixed on one side of the lead grid, and a hemispherical block is provided on the semi-pressure sliding column to be clamped into the ball groove provided on the hard arc plate, and two opposite semi-pressure sliding columns cooperate to clamp the hard arc plate, and a short T-shaped arc column is provided on the warehouse shell to be clamped into the T-shaped arc column groove on the semi-ring control plate, and the outside of the semi-ring control plate is provided with an arc rack to engage with the gear fixed on the short tail shaft for transmission, and an arc plate groove for the lead grid to be clamped is also provided on the inner arc wall in the middle part of the semi-ring control plate.

[0013] A condenser girth welding process comprises the following steps: Step 1: In the electron beam welding preparation stage, the condenser is controlled to be transported on the processing line track through the conveying mechanism, so that a row of pipes on the condenser are transported between the two electron beam emitters. The two symmetrical warehouses are separated to control the two half-rings to move away from each other. The U-shaped tube is positioned between the two adjacent pipe ports on the condenser through the spatial clamping mechanism. Then the two half-rings are close together and spliced into a ring body. The spliced ring body is placed outside the welding interface between the condenser and the U-shaped tube. Step 2: Initially position two horizontally opposed electron beam emitters. One electron beam emitter swings to a position obliquely below the weld interface between the U-shaped tube and the condenser pipe, while the other electron beam emitter swings to a position obliquely above the weld interface between the U-shaped tube and the condenser pipe. The lead grid facing the emission port of each electron beam emitter swings synchronously with the electron beam emitter. Step 3: Circumferential seam welding. Two electron beam emitters that are tilted relative to each other simultaneously emit electron beams to the weld interface of the U-tube and the condenser pipe. The electron beam passes through the circular hole in the middle of the lead grid and is shot at the weld interface of the U-tube and the condenser pipe. At the same time, the two electron beam emitters swing around the pipe weld interface. The electron beam emitter at the lower angle moves to the upper angle and then stops. During the process, the lead grid passed by the laser beam swings synchronously to complete the large arc seam welding of half of the pipe weld interface. After stopping, the electron beam emitter controls its own electron beam to swing slightly to weld the remaining half of the seam, while the electron beam emitter at the upper angle performs relative movement welding to complete the seam welding of the other half of the pipe weld interface. Step 4: Change the pipeline welding end. After welding, the two electron beam emitters stop emitting electron beams at the same time. The electron beam emitter at the upper side is reset and swung downward to a horizontal state, while the electron beam emitter at the lower side is reset and swung upward to a horizontal state. The lead grid is swung to a horizontal state synchronously. If the lead grid absorbs X-rays for more than the prescribed period, the lead grid clamped on the half ring will be ejected and replaced. The lifter drives the two bins by descending, and the two initial bins are quickly moved horizontally apart to control the separation of the two half rings. The two half rings descend to the next pipeline welding end and are re-assembled into a ring body surrounding the pipeline.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. Two opposing electron beam emitters are used to efficiently electron beam weld the annular seams of a row of pipes. During the welding process, the lead grid is synchronously oscillated. The electron beam passes through the circular holes of the lead grid and impacts the weld joint of the pipe. The lead grid absorbs the X-rays generated during the electron beam welding.

[0015] 2. The working period of the lead grid to absorb X-rays is specified. The power is accumulated through the pressure-generating device to record the working time of the reaction lead grid. When the specified time is exceeded, the power accumulated in the pressure-generating device is released, and then the U-shaped push plate pushes a row of stored lead grids to move. The lead grid clamped on the semi-ring device will be pushed away and replaced by the adjacent lead grid. Regular replacement is required to ensure that the lead grid in the adsorption position has sufficient adsorption performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 This is a schematic diagram of the I-beam structure.

[0018] Figure 3 Schematic diagram of the condenser structure.

[0019] Figure 4 Schematic diagram of the lead grid position.

[0020] Figure 5 Schematic diagram of the warehouse location.

[0021] Figure 6 Schematic diagram of the lead grid structure.

[0022] Figure 7 Schematic diagram of the warehouse structure.

[0023] Figure 8 Schematic diagram of the lifter position.

[0024] Figure 9 Schematic diagram of the lifter structure.

[0025] Figure 10 Schematic diagram of the position of the semi-circular device.

[0026] Figure 11 It is a structural diagram of the pressing device.

[0027] Figure 12 This is a schematic diagram of the auxiliary actuator structure.

[0028] Figure 13 Schematic diagram of the semi-circular device structure.

[0029] Figure 14 Schematic diagram of the sub-panel structure.

[0030] In the figure: electron beam emitter 1, robot arm 2, purification mechanism 3, I-beam long plate 4, long shaft gear 5, screw 6, lifter 7, auxiliary actuator 8, bin 9, lead grid 10, half ring device 11, condenser 12, U-shaped tube 13, U-shaped push plate 14, pressure device 15, auxiliary drive shaft 16, bin shell 17, head shaft assembly 18, amplification assembly 19, J-shaped plate 20, lift seat 21, return pressure spring 22, follower frame 23, first rack 24, amplification shaft 25, amplification gear 26 , ring plate gear 27, one-way bearing 28, worm 29, pressure frame 30, spring group 31, back plate 32, outer ring gear 33, spring 34, middle shaft 35, side gear 36, side shaft 37, short tail shaft 38, L-shaped limit plate 39, overlap gear 40, short head shaft 41, introduction shaft 42, introduction gear 43, conveying shaft 44, sub-plate frame 45, split shaft 46, semi-ring control plate 47, U-shaped spring clip 48, semi-pressure slide column 49, short convex plate 50, hard arc plate 51. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the technical solutions in the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] See also Figures 1 to 14 The present invention provides a technical solution: a condenser girth welding device, comprising two relatively distributed electron beam emitters 1, a robot arm 2 for supporting the electron beam emitters 1, and a purification mechanism 3 for girth welding arranged between the two electron beam emitters 1, the purification mechanism 3 comprising a positioning upright I-shaped long plate 4, a long shaft gear 5 supported on both sides of the I-shaped long plate 4, a screw rod 6 supported in the middle of the I-shaped long plate 4, a lifter 7 screwed and driven on the screw rod 6, an auxiliary actuator 8 driven on each long shaft gear 5, and a lifting mechanism 7 and an auxiliary actuator. There are bins 9 with transmission connection between the devices 8, a row of lead grids 10 installed on each bin 9, and a semi-ring device 11 provided on the bin 9 for driving the lead grid 10 to swing around, and the two opposite semi-ring devices 11 are in contact and docked to form a ring body, the lead grid 10 includes an arc plate and a row of arc sheets integrally connected on the inner wall of the arc plate, a circular hole is opened in the middle of the lead grid 10 for the electron beam to pass through, the electron beam emitter 1 and the robot arm 2 are both existing technology equipment, and the long shaft gear 5 and the lead screw 6 are respectively connected to two drive motors in the existing technology.

[0033] refer to Figure 7 It is understood that the bin 9 includes a bin shell 17 for placing a row of lead grids 10, a head shaft group 18 and a pressing device 15 connected to one side of the bin shell 17, the pressing device 15 drives a U-shaped push plate 14 for pushing a row of lead grids 10, and a secondary drive shaft 16 for establishing a transmission between the pressing device 15 and the head shaft group 18. The bin shell 17 includes an arc plate and a baffle plate vertically fixed on the edges of both sides of the arc plate. One end of the U-shaped push plate 14 pushes a row of lead grids 10 to move to eject and replace the lead grid 10 clamped on the semi-ring device 11.

[0034] refer to Figure 9 It is understood that the warehouse shell 17 includes a lifting seat 21 that moves along the length direction of the I-beam long plate 4, a J-shaped plate 20 supported on both sides of the lifting seat 21, and an amplifying group 19 that establishes a transmission between the J-shaped plate 20 and the I-beam long plate 4. The screw rod 6 passes through the threaded hole opened on the lifting seat 21, and the middle long plate on the I-beam long plate 4 slides through the plate hole opened on the lifting seat 21, and a row of V-shaped grooves are opened on both sides of the middle long plate. One end of the J-shaped plate 20 is fixed to the warehouse shell 17.

[0035] refer to Figure 9It is understood that the J-shaped plate 20 slides through the plate hole opened on the lifting seat 21, and the lifting seat 21 on one side of the plate hole is also provided with an empty groove for the row of teeth set on the J-shaped plate 20 to move. The amplification group 19 includes an amplification gear 26 on the J-shaped plate 20 that is meshed and transmission-connected with a row of teeth, an amplification shaft 25 fixed at one end of the amplification gear 26, a follower frame 23 supporting the amplification shaft 25, a first rack 24 that is meshed and transmission-connected with the fixed shaft gear at one end of the amplification shaft 25, and a return pressure spring piece 22 fixed at one end on the follower frame 23, the other end of the return pressure spring piece 22 rests on one end of the first rack 24, and the other end of the first rack 24 is stuck in the V-shaped groove opened on the I-beam long plate 4, the first rack 24 slides through the square hole opened on the follower frame 23, one end of the follower frame 23 is fixed on the lifting seat 21, and the amplification shaft 25 is movably sleeved in the through hole opened on the follower frame 23.

[0036] refer to Figure 11 It is understood that the pressing device 15 includes a pressing frame 30 with one end fixed on the magazine shell 17, a worm 29 supported on the pressing frame 30, a one-way bearing 28 fixed on one end of the worm 29, a ring plate gear 27 fixed on the outside of the one-way bearing 28, and a spring group 31 driven by the other end of the worm 29. The end of the auxiliary drive shaft 16 is meshed and connected with the ring plate gear 27 through a fixed shaft gear, and the worm 29 is movably sleeved in a column hole opened on the pressing frame 30.

[0037] refer to Figure 11 It is understood that one end of the U-shaped push plate 14 slides through the square tube fixed on the warehouse shell 17, and the spring group 31 includes a side gear 36 with a row of teeth meshing and transmission connected to the other end of the U-shaped push plate 14, a side shaft 37 fixed at one end of the side gear 36, an outer ring gear 33 that is also meshing and transmission connected to one side of the side gear 36, a center shaft 35 set in the middle of the outer ring gear 33, a spring 34 connected between the center shaft 35 and the outer ring gear 33, a back plate 32 fixed on the bottom surface of one side of the outer ring gear 33, the center shaft 35 and the side shaft 37 are respectively movably sleeved in two through holes opened on the pressing frame 30, and the center shaft 35 is also movably sleeved in the through hole opened in the middle of the back plate 32. The center shaft 35 is meshing and transmission connected with the helical teeth on the worm 29 through a fixed gear.

[0038] The head shaft group 18 includes an L-shaped limit plate 39 fixed on the warehouse shell 17, a short tail shaft 38 and a short head shaft 41 supported on the L-shaped limit plate 39, and a lap gear 40 fixed on the short head shaft 41. One end of the short head shaft 41 is meshed and connected with the annular bevel gear fixed on the short tail shaft 38 through a fixed bevel gear. One end of the short tail shaft 38 is coaxially fixed to the auxiliary drive shaft 16, and the other end of the short tail shaft 38 is connected to the semi-ring device 11 through a fixed gear. The short tail shaft 38 and the short head shaft 41 are respectively movably sleeved in the two through holes opened on the L-shaped limit plate 39.

[0039] The secondary actuator 8 includes a secondary plate frame 45 with one end fixed to the lifting seat 21, an introduction shaft 42 supported on the secondary plate frame 45, a conveying shaft 44, and a dividing shaft 46, as well as an introduction gear 43 fixed to one end of the introduction shaft 42. One end of the conveying shaft 44 is meshed and drivingly connected to a bevel gear fixed to one end of the dividing shaft 46 through a fixed bevel gear. On the dividing shaft 46, it is meshed and drivingly connected to a lapping gear 40 on one side through a fixed cylindrical gear. The other end of the conveying shaft 44 is meshed and drivingly connected to a bevel gear fixed to one end of the introduction shaft 42 through a fixed bevel gear. The other end of the introduction shaft 42 is meshed and drivingly connected to a long shaft gear 5 on one side through a fixed gear. The introduction shaft 42, the conveying shaft 44, and the dividing shaft 46 are respectively movably sleeved in different through holes opened on the secondary plate frame 45.

[0040] The half-ring device 11 includes a half-ring position control plate 47 with a T-shaped arc column groove opened inside, two symmetric short convex plates 50 fixed on the inner arc wall of the half-ring position control plate 47, a half-pressure sliding column 49 slidably passing through a column hole opened on the short convex plate 50, and a U-shaped elastic sheet 48 with one end resting on the half-pressure sliding column 49. The other end of the U-shaped elastic sheet 48 is fixed to the short convex plate 50. One side of the lead grille 10 is fixed with a hard arc plate 51. The half-pressure sliding column 49 is provided with a hemispherical block to be clamped into a ball groove opened on the hard arc plate 51, and two opposite half-pressure sliding columns 49 cooperate to clamp the hard arc plate 51. On the bin housing 17, a short T-shaped arc column is provided to be clamped into the T-shaped arc column groove on the half-ring position control plate 47. An arc-shaped rack is provided on the outside of the half-ring position control plate 47 to be meshed and drivingly connected to a gear fixed to the short tail shaft 38. An arc plate groove for the lead grille 10 to be inserted is also opened on the inner arc wall in the middle of the half-ring position control plate 47. Here, refer to Figure 13 and Figure 12 to understand the structure at the waist position of the half-ring position control plate 47. Figure 13 If the lead grille 10 on the right side in Figure 14 wants to push the lead grille 10 on the left side out of the half-ring position control plate 47, on the one hand, the thrust should be greater than the clamping pressure of the half-pressure sliding column 49, and on the other hand, the lead grille 10 on the half-ring position control plate 47 should be kept in a completely fitting state with the pushed lead grille 10. If the half-ring position control plate 47 moves around, the half-ring position control plate 47 is not Figure 6 in the position state shown. The half-ring position control plate 47 itself can intercept the pushed lead grille 10, that is, the timing for fixing the replacement of the lead grille 10. When the lead grille 10 in the adsorption working position resets and swings to the horizontal state, in the state shown in

[0041] The half-ring position control plate 47 will pause. If the thrust provided by the U-shaped push plate 14 is sufficient, the lead grille 10 controlled in the middle of the half-ring position control plate 47 will be directly pushed out and replaced.

[0041] A condenser circumferential seam welding process includes the following steps: Step 1: In the preparation stage of electron beam welding, the conveying mechanism is used to control the conveyance of the condenser 12 on the processing line track, so that a row of pipes on the condenser 12 is conveyed between the two electron beam emitters 1. The two symmetric bins 9 are separated to control the separation of the two half-ring devices 11 away from each other. The U-shaped pipe 13 is positioned between the adjacent two pipe ports on the condenser 12 through the space clamping mechanism. Subsequently, the two half-ring devices 11 approach each other to form a ring body, and the spliced ring body is arranged around the outer position of the pipe welding joint of the condenser 12 and the U-shaped pipe 13. Step 2: The initial positioning of the two horizontally opposite electron beam emitters 1. One electron beam emitter 1 swings to the lower left of the pipe welding joint of the U-shaped pipe 13 and the condenser 12, while the other electron beam emitter 1 swings to the upper right of the pipe welding joint of the U-shaped pipe 13 and the condenser 12. The lead gratings 10 facing the emission ports of each electron beam emitter 1 swing synchronously with the electron beam emitter 1. Step 3: Circular seam welding. The two obliquely opposite electron beam emitters 1 simultaneously emit electron beams towards the pipe welding joint of the U-shaped pipe 13 and the condenser 12. The electron beams pass through the middle circular holes of the lead gratings 10 and then hit the pipe welding joint of the U-shaped pipe 13 and the condenser 12. At the same time, the two electron beam emitters 1 swing around the pipe welding joint. The electron beam emitter 1 at the lower left stops after moving to the upper right. During the process, the lead grating 10 penetrated by the laser beam swings synchronously, completing the welding of the large arc seam on one side of the pipe welding joint. And the stopped electron beam emitter 1 welds the remaining seam on one side by controlling the small swing of its own emitted electron beam, while the electron beam emitter 1 at the upper right performs the relative movement welding to complete the welding of the other side seam of the pipe welding joint. Step 4: Change the pipe welding joint. After the welding is completed, the two electron beam emitters 1 stop emitting electron beams simultaneously. The electron beam emitter 1 at the upper right swings downward to the horizontal state, while the electron beam emitter 1 at the lower left swings upward to the horizontal state. The lead grating 10 swings to the horizontal state synchronously. If the working time of the lead grating 10 absorbing X-rays exceeds the specified period, the lead grating 10 clamped on the half-ring device 11 will be ejected and replaced. The lifter 7 drives the two bins 9 to descend, and the initial two bins 9 move horizontally and quickly separate to control the separation of the two half-ring devices 11. The two half-ring devices 11 descend to the next pipe welding joint and re-splice into a ring body surrounding the pipe.

[0042] Two U-shaped spring pieces 48 apply pressure to clamp the hard arc plate 51 with two semi-pressure sliding columns 49, so that the semi-ring position control plate 47 controls the synchronous circumferential swing of the lead grille 10 by swinging around the welding joint of the pipeline. The power source for the circumferential swing of the semi-ring position control plate 47 is the rotation of the long-axis gear 5, that is, the long-axis gear 5 drives the introduction gear 43, and then drives the conveying shaft 44 through the introduction shaft 42. Next, the branch shaft 46 drives the lapping gear 40, and then drives the short-tail shaft 38 through the short-head shaft 41, and then causes the movement of the semi-ring position control plate 47.

[0043] The bin device 9 drives the semi-ring device 11 to swing and separate because Figure 9 the lead screw 6 in it rotates to drive the lifting seat 21 to lift and lower. The first rack 24 accompanying the lifting will be pushed out of the V-shaped groove. The translation of the first rack 24 will drive the amplification shaft 25 to rotate, and then the amplification gear 26 rotates to drive the J-shaped plate 20. The two opposite J-shaped plates 20 move away from each other, thereby driving the two symmetrical bin shells 17 to separate. The bin shell 17 drives the semi-ring position control plate 47, so that the bin device 9 and the semi-ring device 11 move horizontally synchronously, and the two opposite semi-ring devices 11 separate, so that the semi-ring device 11 will not be intercepted and affected by the U-shaped pipe 13 during lifting.

[0044] The present invention also has an automatic replacement mechanism for the lead grille 10. The lead grille 10 is used to absorb the X-rays generated when the electron beam impacts the welding joint of the pipeline, but it needs to be replaced regularly to avoid the decline of the adsorption performance of the saturated lead grille 10. Each time the electron beam circumferential welding is performed, it will be accompanied by the movement of the semi-ring position control plate 47. The movement duration of the semi-ring position control plate 47 can reflect the adsorption time of the lead grille 10. The accumulation of the movement duration is recorded by the spring 34. During the electron beam welding process, the semi-ring position control plate 47 swings circumferentially. After the welding is completed, the semi-ring position control plate 47 swings reversely to reset. During the reset process, the short-tail shaft 38 drives the secondary drive shaft 16, and then drives the one-way bearing 28 through the ring plate gear 27. Next, the worm 29 drives the middle shaft 35, and the spring 34 contracts and stores energy. After the spring 34 stores enough energy, that is, enough to break the clamping state in the semi-ring device 11. When the semi-ring device 11 controls the lead grille 10 to swing circumferentially to the horizontal state, the lead grille 10 clamped on the semi-ring device 11 is directly pushed out and replaced. Specifically, the spring 34 releases power to make the external gear ring 33 rotate, and then the side gear 36 rotates to cause the U-shaped push plate 14 to translate. The U-shaped push plate 14 pushes a row of lead grilles 10, and the lead grille 10 clamped on the semi-ring device 11 will be pushed away and replaced by the adjacent lead grille 10.

[0045] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A condenser circumferential seam welding device, comprising two relatively distributed electron beam emitters (1), a robotic arm (2) for supporting the electron beam emitter (1), and a purification mechanism (3) arranged between the two electron beam emitters (1) for circumferential seam welding, characterized in that: The purification mechanism (3) comprises an I-shaped long plate (4) for positioning and standing, long shaft gears (5) supported on both sides of the I-shaped long plate (4), a screw rod (6) supported in the middle of the I-shaped long plate (4), a lifter (7) screwed and driven on the screw rod (6), an auxiliary actuator (8) driven on each long shaft gear (5), a bin (9) connected in transmission between the lifter (7) and the auxiliary actuator (8), a row of lead grids (10) mounted on each bin (9), and a semi-ring device (11) provided on the bin (9) for driving the lead grid (10) to swing around, and two opposing semi-ring devices (11) are in contact and docked to form a ring body, the lead grid (10) comprises an arc plate and a row of arc sheets integrally connected on the inner wall of the arc plate, and a circular hole for the electron beam to pass through is opened in the middle of the lead grid (10).

2. The condenser circumferential seam welding equipment according to claim 1, characterized in that: The bin (9) includes a bin shell (17) for placing a row of lead grids (10), a head shaft group (18) and a pressing device (15) connected to one side of the bin shell (17), a U-shaped push plate (14) driven by the pressing device (15) for pushing the row of lead grids (10), and a secondary drive shaft (16) for establishing transmission between the pressing device (15) and the head shaft group (18), the bin shell (17) includes an arc plate and a baffle plate vertically fixed to the edges of both sides of the arc plate, and one end of the U-shaped push plate (14) pushes the row of lead grids (10) to move to eject and replace the lead grid (10) clamped on the semi-ring device (11).

3. The condenser circumferential seam welding equipment according to claim 2, characterized in that: The silo shell (17) includes a lifting seat (21) that moves along the length direction of the I-shaped long plate (4), a J-shaped plate (20) supported on both sides of the lifting seat (21), and an amplifying group (19) that establishes a transmission between the J-shaped plate (20) and the I-shaped long plate (4). The screw rod (6) passes through the threaded hole opened on the lifting seat (21), and the middle long plate on the I-shaped long plate (4) slides through the plate hole opened on the lifting seat (21), and a row of V-shaped grooves are opened on both sides of the middle long plate. One end of the J-shaped plate (20) is fixed to the silo shell (17).

4. A condenser circumferential seam welding device according to claim 3, characterized in that: The J-shaped plate (20) slides through the plate hole opened on the lifting seat (21), and the lifting seat (21) on one side of the plate hole is also provided with an empty slot for the J-shaped plate (20) to be provided with a row of teeth. The amplification group (19) includes an amplification gear (26) connected to the J-shaped plate (20) by a row of teeth meshing transmission, an amplification shaft (25) fixed at one end of the amplification gear (26), a follower frame (23) supporting the amplification shaft (25), and a shaft (25) connected to the amplification shaft (25). A first rack (24) is connected to a fixed shaft gear meshing transmission at one end, and a return pressure spring (22) is fixed on the follower frame (23) at one end. The other end of the return pressure spring (22) is placed on one end of the first rack (24). The other end of the first rack (24) is inserted into a V-shaped groove provided on the I-shaped long plate (4). The first rack (24) slides through a square hole provided on the follower frame (23). One end of the follower frame (23) is fixed on the lifting seat (21).

5. The condenser circumferential seam welding equipment according to claim 2, characterized in that: The hair pressing device (15) includes a hair pressing frame (30) with one end fixed to the cartridge housing (17), a worm (29) supported on the hair pressing frame (30), a one-way bearing (28) fixedly sleeved at one end of the worm (29), an annular plate gear (27) fixedly sleeved outside the one-way bearing (28), and a spring group (31) driven by the other end of the worm (29). The end of the secondary drive shaft (16) is meshed and drivingly connected to the annular plate gear (27) through a fixed shaft gear.

6. The condenser circumferential seam welding equipment according to claim 5, characterized in that: One end of the U-shaped push plate (14) slides through a square tube fixed to the cartridge housing (17). The spring group (31) includes a side gear (36) meshed and drivingly connected to a row of teeth provided at the other end of the U-shaped push plate (14), a side shaft (37) fixed to one end of the side gear (36), an external gear ring (33) also meshed and drivingly connected to one side of the side gear (36), a middle shaft (35) provided in the middle of the external gear ring (33), a spring (34) connected between the middle shaft (35) and the external gear ring (33), a back plate (32) fixed to the bottom surface on one side of the external gear ring (33). The middle shaft (35) and the side shaft (37) are respectively movably sleeved in two through holes opened on the hair pressing frame (30), and the middle shaft (35) is also movably sleeved in a through hole opened in the middle of the back plate (32). The middle shaft (35) is meshed and drivingly connected to the helical teeth on the worm (29) through a fixed gear.

7. A condenser circumferential seam welding device according to claim 3, characterized in that: The head shaft group (18) includes an L-shaped limit plate (39) with one section fixed to the cartridge housing (17), a short tail shaft (38) and a short head shaft (41) supported on the L-shaped limit plate (39), and a lapping gear (40) fixed to the short head shaft (41). One end of the short head shaft (41) is meshed and drivingly connected to an annular bevel gear fixed to the short tail shaft (38) through a fixed bevel gear. One end of the short tail shaft (38) is coaxially fixed to the secondary drive shaft (16), and the other end of the short tail shaft (38) is drivingly connected to the half-ring device (11) through a fixed gear.

8. A condenser circumferential seam welding device according to claim 7, characterized in that: The secondary actuator (8) includes a secondary plate frame (45) with one end fixed to the lifting seat (21), an introduction shaft (42), a conveying shaft (44) and a dividing shaft (46) supported on the secondary plate frame (45), and an introduction gear (43) fixed to one end of the introduction shaft (42). One end of the conveying shaft (44) is meshed and drivingly connected to a bevel gear fixed to one end of the dividing shaft (46) through a fixed bevel gear. The dividing shaft (46) is meshed and drivingly connected to a lapping gear (40) on one side through a fixed cylindrical gear. The other end of the conveying shaft (44) is meshed and drivingly connected to a bevel gear fixed to one end of the introduction shaft (42) through a fixed bevel gear. The other end of the introduction shaft (42) is meshed and drivingly connected to a long shaft gear (5) on one side through a fixed gear.

9. The condenser circumferential seam welding equipment according to claim 7, characterized in that: The semi-ring device (11) includes a semi-ring position control plate (47) with a T-shaped arc column groove formed inside, two symmetric short convex plates (50) fixed on the inner arc wall of the semi-ring position control plate (47), a semi-pressure sliding column (49) sliding through the column holes formed on the short convex plates (50), and a U-shaped elastic sheet (48) with one end resting on the semi-pressure sliding column (49), the other end of the U-shaped elastic sheet (48) being fixed on the short convex plate (50). A hard arc plate (51) is fixed on one side of the lead grille (10). Hemispherical blocks are arranged on the semi-pressure sliding column (49) to be clamped into the ball grooves formed on the hard arc plate (51), and two opposite semi-pressure sliding columns (49) cooperate to clamp the hard arc plate (51). Short T-shaped arc columns are arranged on the bin shell (17) to be clamped into the T-shaped arc column grooves on the semi-ring position control plate (47). An arc-shaped rack is arranged outside the semi-ring position control plate (47) to be in meshing transmission connection with the gear fixed on the short tail shaft (38). An arc plate groove for the lead grille (10) to be clamped into is further formed on the inner arc wall in the middle of the semi-ring position control plate (47).

10. A condenser circumferential seam welding process, used for a condenser circumferential seam welding device as described in claim 1, characterized in that, It includes the following steps: Step 1: In the preparation stage of electron beam welding, the condenser is controlled to be conveyed on the processing line track through the conveying mechanism, so that a row of pipes on the condenser are conveyed between two electron beam emitters (1). Two symmetric bin devices (9) are separated to control the two semi-ring devices (11) to move away and separate. The U-shaped pipe is positioned between the pipe ports of two adjacent pipes on the condenser through the space clamping mechanism. Subsequently, the two semi-ring devices (11) approach and are spliced into a ring body, and the spliced ring body is arranged outside the welding joints of the condenser and the U-shaped pipe. Step 2: Initial positioning of two horizontally opposite electron beam emitters (1). One electron beam emitter (1) swings to the lower left of the welding joint of the U-shaped pipe and the condenser pipe, while the other electron beam emitter (1) swings to the upper left of the welding joint of the U-shaped pipe and the condenser pipe. The lead grille (10) facing the emission port of each electron beam emitter (1) swings synchronously with the electron beam emitter (1). Step 3: Circumferential seam welding. The two inclined opposite electron beam emitters (1) simultaneously emit electron beams towards the welding joint of the U-shaped pipe and the condenser pipe. The electron beams pass through the central round holes of the lead grille (10) and then irradiate on the welding joint of the U-shaped pipe and the condenser pipe. At the same time, the two electron beam emitters (1) swing around the pipe welding joint. The electron beam emitter (1) at the lower left stops after moving to the upper left. During the process, the lead grille (10) penetrated by the laser beam swings synchronously to complete the welding of the large arc seam on half of the pipe welding joint. After stopping, the electron beam emitter (1) controls the small swing of its emitted electron beam to weld the remaining seam on half of the surface, while the electron beam emitter (1) at the upper left performs relative movement welding to complete the welding of the seam on the other half of the pipe welding joint. Step 4: Change the welding butt joint of the pipeline. After welding is completed, the two electron beam emitters (1) stop emitting electron beams simultaneously. The electron beam emitter (1) diagonally above swings downward and resets to the horizontal state, while the electron beam emitter (1) diagonally below swings upward and resets to the horizontal state. The lead grille (10) swings to the horizontal state synchronously. If the work of the lead grille (10) absorbing X-rays exceeds the specified period, the lead grille (10) clamped on the half-ring device (11) will be ejected and replaced. The lifter (7) drives the two bin devices (9) by descending, and the initial two bin devices (9) are quickly separated horizontally to control the separation of the two half-ring devices (11). The two half-ring devices (11) descend to the next pipeline welding butt joint and are re-assembled into a ring body surrounding the pipeline.

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