Welding equipment for vacuum container sleeve and flange

Abstract

The utility model relates to welding equipment for a vacuum container sleeve and a flange, which comprises a welding platform with a cooling device and a welding manipulator, the welding manipulator is mounted on a transverse linear track, and the transverse linear track is fixed on a wall; the welding platform comprises a platform supporting frame, a cooling device and a clamp supporting frame, the cooling device and the clamp supporting frame are arranged on the platform supporting frame, a vacuum container flange is installed in the cooling device, and a vacuum container barrel clamp used for clamping a vacuum container barrel and guaranteeing that the vacuum container barrel and the vacuum container flange are coaxial is installed on the clamp supporting frame. A welding gun for welding the joint of the vacuum container barrel and the vacuum container flange is installed on the welding manipulator, a flame gun is installed on the platform supporting frame, and flames of the flame gun directly face the joint of the vacuum container barrel and the vacuum container flange. And the problem of welding deformation of the vacuum container flange with the O-shaped ring groove can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of welding equipment used on vacuum container, in particular the welding equipment of vacuum container sleeve and flange. BACKGROUND

[0002] Vacuum container includes vacuum container cylinder and vacuum container flange, when assembling and welding vacuum container cylinder and vacuum container flange, because vacuum container flange has O-ring groove, the shape and stress distribution of welding structure are changed by the existence of O-ring groove;When welding, weld and its peripheral area will expand due to heat, the constraint condition of thermal expansion at the edge, corner and other positions of groove becomes complex, in the interior of groove, shrinkage force can be concentrated on certain point or line, unlike in groove structure can be more evenly distributed on the entire welding surface, this uneven shrinkage force is prone to deformation, for example, make the shape of groove twist, or make the welding piece with groove overall bend;Furthermore, heat cycle in the welding process becomes more complex in groove structure, due to the existence of groove, the heat transfer speed is different in groove and outside groove, local heat concentration area can be formed near groove, which makes the metal material around groove experience different degrees of heat cycle at different positions, leading to different changes of material performance in different areas, further increasing the possibility of deformation. This stress can make the structure deform even crack during use, and the vacuum container needs to maintain high vacuum and it is difficult to detect vacuum leakage, etc. reasons, the flange needs to be guaranteed without deformation and stable weld during welding, the current welding equipment and welding tooling are difficult to improve the problem of no deformation of flange welding with O-ring groove.

[0003] At present, the Chinese patent "A kind of automatic welding equipment suitable for vacuum container big circle diameter metal seal" (CN118321765B) is retrieved, which includes a plurality of pre-tightening clamps arranged on the top cover and cylinder of the vacuum container, and a welding structure located between the pre-tightening clamps. The welding structure has a housing, a plurality of moving mechanisms, a laser welding gun, and a vision camera. Each moving mechanism is provided with a drive motor. The invention has the advantages of flexibility, small size, high adaptability, and high welding efficiency. It breaks through the limitations of existing welding equipment for large-diameter, thin-walled, and space-limited structure material integrated welding, effectively meets the requirements of high-precision sealing assembly for large-diameter vacuum containers, obtains low deformation, small heat-affected zone, and high-quality weld, and can perform automatic welding, saving manpower and resources. However, this patent cannot improve the problem of deformation of vacuum container flange welding with O-ring groove.

[0004] In addition, the Chinese patent "Vacuum container and welding process thereof" (CN116649760A) is retrieved, which comprises an inner container for storing liquid, the inner container comprising a container body and an inner bottom, the outer container is fixed outside the inner container, the outer container comprises a shell and a middle bottom, the outer container is coaxially arranged with the inner container, a first communication port is arranged on the side wall of the container body or the end face of the inner bottom, a second communication port is arranged on the side wall of the shell or the end face of the middle bottom, the first communication port and the second communication port are coaxially arranged, a flow guide pipe is fixed between the first communication port and the second communication port, a faucet is fixed on the inner side wall of the flow guide pipe. Although this patent has the effect of facilitating the outflow of liquid in the vacuum container, it still cannot improve the problem of deformation of the vacuum container flange with O-ring groove during welding. SUMMARY

[0005] In view of the above shortcomings of the prior art, the purpose of the present utility model is to provide a vacuum container sleeve and flange welding equipment, which is reasonably designed and can improve the problem of deformation of the vacuum container flange with O-ring groove during welding.

[0006] The utility model discloses a kind of vacuum container sleeve and flange's welding equipment, it is characterized by: including welding platform with cooling device and welding mechanical hand, the welding platform includes platform support frame, cooling device and fixture support frame being arranged on platform support frame, vacuum container flange is installed in the cooling device, vacuum container cylinder clamp for clamping vacuum container cylinder and guaranteeing vacuum container cylinder and vacuum container flange coaxial is installed on the fixture support frame, welding torch for welding at the joint of vacuum container cylinder and vacuum container flange is installed on the welding mechanical hand, flame gun is installed on the platform support frame, the flame of flame gun is directed to the joint of vacuum container cylinder and vacuum container flange, rotating mechanism for driving vacuum container flange and vacuum container cylinder synchronous rotation is equipped in the cooling device.

[0007] Preferably, the above-mentioned cooling device comprises a cooling pool and a rotating mechanism connected to the cooling pool, the rotating mechanism comprises a chuck in the cooling pool for clamping the vacuum container flange, a rotating shaft fixedly connected with the chuck, and a rotating motor located outside the cooling pool, the rotating motor drives the rotating shaft to rotate to drive the chuck and the vacuum container flange thereon to rotate, a circulating pump, a temperature control water tank, and a circulating pipeline communicating with the cooling pool, the circulating pump, and the temperature control water tank are provided below the cooling pool to realize the circulating flow and temperature control of the cooling liquid in the cooling pool.

[0008] Preferably, the circulation pipeline comprises three segments, i.e. a first segment, a second segment and a third segment. The inlet end of the first segment is connected to the outlet of the cooling pool. The outlet end of the first segment is connected to the inlet of the water tank with temperature control. The outlet end of the water tank with temperature control is connected to the inlet of the second segment. The outlet end of the second segment is connected to the inlet of the circulation pump. The outlet end of the circulation pump is connected to the inlet of the third segment. The outlet end of the third segment is connected to the return of the cooling pool.

[0009] Preferably, the outlet of the cooling pool is fixedly connected to an inner tube. An overflow adjusting tube is sleeved on the inner tube and can be adjusted in height. The upper end of the overflow adjusting tube is lower than the highest water level of the cooling pool. The cooling liquid in the cooling pool overflows into the water tank with temperature control through the upper end of the overflow adjusting tube.

[0010] Preferably, a temperature sensor is installed in the cooling pool to adjust the temperature of the cooling liquid in the cooling pool.

[0011] Preferably, the lower part of the cooling pool is provided with a drain outlet and a drain pipe with a drain valve connected to the drain outlet.

[0012] Preferably, the bottom of the cooling pool is provided with a through hole. A sealing seat is installed in the through hole. The sealing seat is an annular stepped sleeve. The annular flange at the upper part of the sealing seat is locked on the outer periphery of the through hole. The lower part of the sealing seat is connected to a rotary motor. A bearing is installed in the stepped groove at the center of the sealing seat. The rotary shaft is arranged in the bearing. The boss at the upper end of the rotary shaft is fixedly connected to the clamping seat. A rotary sealing ring is installed between the boss at the upper end of the rotary shaft and the annular flange at the upper part of the sealing seat.

[0013] Preferably, the lower surface of the vacuum container flange is provided with an annular groove for installing a sealing ring. The upper end of the overflow adjusting tube is 1-3 mm higher than the lower surface of the vacuum container flange.

[0014] Preferably, two pairs of clamp support frames are arranged on the platform support frame on both sides of the cooling pool of the cooling device. Each clamp support frame comprises a vertical plate and a horizontal plate connected perpendicularly to the vertical plate. The front end of the horizontal plate is provided with a transverse plate. A horizontal cylinder is horizontally installed on the horizontal plate. The front end of the horizontal cylinder is limitingly installed on the transverse plate. The telescopic rod of the horizontal cylinder passes through the center hole of the transverse plate and is provided with an arc-shaped plate at the free end of the telescopic rod. Two slide rods are fixedly installed on both sides of the arc-shaped plate. The slide rods pass through the through holes on both sides of the transverse plate to realize horizontal sliding. When the telescopic rods of the two horizontal cylinders are elongated, the central axis surrounded by the arc-shaped plate is coaxial with the rotation center line of the rotating mechanism.

[0015] Preferably, the above-mentioned adjusting frame is a plate body fixed on the side of the cooling pool, a plurality of bolt holes are arranged on the plate body, the flame gun is locked on the adjusting plate by screws, and a strip-shaped groove is arranged on the adjusting plate, and the bolt passes through the strip-shaped groove and is locked with the bolt hole on the adjusting frame.

[0016] The welding process of the vacuum container sleeve and the flange:

[0017] Step 1: Place the vacuum container flange on the chuck, lock the chuck to clamp and fix the vacuum container flange;

[0018] Step 2: Place the vacuum container cylinder on the vacuum container flange;

[0019] Step 3: The vacuum container cylinder clamp clamps the cylinder so that the vacuum container cylinder is concentric with the vacuum container flange;

[0020] Step 4: Release the clamping of the vacuum container cylinder by the vacuum container cylinder clamp, and drive the vacuum container flange and the vacuum container cylinder to rotate synchronously by the rotating mechanism;

[0021] Step 5: Open the flame gun to preheat the joint between the vacuum container flange and the vacuum container cylinder, the flame jet position of the flame gun is opposite to the welding seam position, the temperature of the flame jet position is 100-250 degrees Celsius, and the heating time is 2-7 minutes to eliminate internal stress;

[0022] Step 6: After preheating, the welding equipment on the manipulator is used to position weld the joint between the vacuum container flange and the vacuum container cylinder in a spot welding manner, there are four positioning welds, the four positioning welds are 90 degrees apart, and then the back welding method is used to bottom weld the weld, that is, the joint at the whole circumference is divided into four short welds, each segment is welded in turn, and the end point of each segment coincides with the starting point of the previous segment. When the current segment is welded and the starting point of the previous segment is reached, the temperature of the starting point is still high, so the temperature difference is not large. In this way, the degree of uneven heating and cooling is improved, and the stress and deformation after welding are reduced.

[0023] Step 7: Open the circulating pump to flow the cooling liquid into the cooling pool, adjust the height of the overflow adjusting pipe to ensure that the cooling liquid is 1-3mm higher than the lower surface of the vacuum container flange;

[0024] Step 8: Turn on the welding equipment on the manipulator to fill weld 3 times and cover weld 1 time on the joint between the vacuum container flange and the vacuum container cylinder, and then complete the welding, start the temperature control water tank and the circulating pump to control the temperature of the cooling liquid at 65-75℃; ensure that the welding part is heated uniformly during welding, and reduce the residual stress and deformation.

[0025] Step 9: After welding, disassemble the vacuum container.

[0026] Preferably, the thickness of the flange plate in the above step is 10mm, the thickness of the cylinder plate is 5mm, the diameter of the cylinder is 200mm, the material is 304 stainless steel, the flange plate is opened with a single V-shaped groove, the groove angle is 55°, the blunt edge is 2mm, the cooling liquid temperature is set to 70℃, argon arc welding is adopted, the argon purity is 99.99%, the current of the welding equipment is 125A, the welding voltage is 22V, the welding wire is a flux-cored wire, the welding speed is 60-90mm / min, the acetylene pressure used by the flame gun is adjusted to 0.05Mpa, the oxygen pressure is adjusted to 0.2Mpa, the temperature of the flame jet at the welding seam position is 150 degrees Celsius, and the heating time is 5 minutes to eliminate internal stress.

[0027] The advantages of the utility model are:

[0028] 1. The application sets the flame gun to preheat the joint of the vacuum container flange and the vacuum container cylinder to eliminate internal stress, thereby improving the welding quality from the first level.

[0029] 2. The application sets a cooling device, the cooling liquid is a glycol type cooling liquid, and the welding temperature is maintained at a certain temperature to make the deformation of the welded vacuum container flange small, thereby playing a role in the quality of welding from the second level.

[0030] 3. The application sets a vacuum container cylinder clamp to ensure the concentricity of the vacuum container cylinder and the vacuum container flange, thereby improving the welding quality from the third level.

[0031] 4. The application sets a temperature sensor and a circulating pump in the cooling device, and the temperature control water tank can accurately control the temperature of the cooling liquid to accurately control the temperature of the cooling liquid.

[0032] 5. The application sets an overflow adjusting pipe and an O-ring in the cooling pool to adjust the liquid level of the cooling liquid to be 1-3mm below the lower surface of the flange according to different workpieces, so as to realize the maximum reduction of the deformation amount. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as the limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the premise.

[0034] Figure 1 It is the perspective view of the utility model;

[0035] Figure 2 It is the partial perspective view of Figure 1

[0036] ​Figure 3 is a sectional view of Figure 2 ;

[0037] Figure 4 is a partial view of Figure 2 ;

[0038] Figure 5 , Figure 6 is a partial view of Figure 3 .

[0039] The central control reset foot pedal and the combined connection method thereof will be further described in detail below in combination with the drawings and specific implementation structures. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0041] The welding equipment for the sleeve and the flange of the vacuum container comprises a welding platform 5 with a cooling device and a welding manipulator 3, the welding manipulator 3 is installed on a transverse linear track 2 (which can be a linear guide rail and can drive the welding manipulator 3 to move transversely), and the transverse linear track 2 is fixed on a wall 1; a welding swing head 4 is installed on the welding manipulator 3, a welding torch is installed on the welding swing head 4, and the welding torch can realize welding on any welding position through the action of the welding manipulator 3 (the welding manipulator 3 can move transversely on the transverse linear track 2, and the welding swing head 4 can move universally at the end of the welding manipulator), and how the transverse linear track 2, the welding manipulator 3 and the welding swing head 4 move is the prior art, which will not be described here.

[0042] A side of the transverse linear track 2 is also provided with an electric control system 6, a welding machine 7 and a wire feeder 8, etc., the welding machine 7 and the wire feeder 8 belong to part of the welding equipment to realize the welding action, the electric control system 6 comprises an electric control device for controlling the welding action, the action of the welding manipulator 3 and the welding swing head 4, etc., which is the prior art, and will not be described here.

[0043] The above content is the prior art, and the structure and working method thereof are known to those skilled in the art, and the following is the invention content of the present application.

[0044] The welding platform 5 comprises a platform support frame 504 (such as Figure 2The shown can be a rectangular shelf, a cooling device provided on the platform support frame 504, and a clamp support frame 506. The cooling device is provided with a vacuum container flange 503 and the like.

[0045] The specific cooling device includes a cooling pool 507 and a rotating mechanism connected to the cooling pool 507. The rotating mechanism includes a chuck 513 (which can be a three-jaw chuck) in the cooling pool 507 for clamping the vacuum container flange 503, a rotating shaft 519 fixedly connected to the chuck 513, and a rotating motor 518 (which includes a speed reducer and the like) located below the cooling pool 507. When the rotating motor 518 operates, it drives the rotating shaft 519, the chuck 513, and the vacuum container flange 503 installed thereon to rotate in sequence. Below the cooling pool 507 is provided a circulating pump 510, a temperature-controlled water tank 517 (which can control the temperature of the cooling liquid therein and is a known component), and a circulating pipeline 520 connected to the cooling pool 507, the circulating pump 510, and the temperature-controlled water tank 517. Through the action of the circulating pump 510, the temperature-controlled water tank 517 and the cooling liquid in the cooling pool 507 circulate. The cooling liquid can be water, ethylene glycol-based cooling liquid, or the like.

[0046] In order to realize the circulation of the cooling liquid, the circulating pipeline 520 includes three segments, namely a first segment, a second segment, and a third segment. The inlet end of the first segment is in communication with the outlet of the cooling pool 507 (provided at the bottom of the cooling pool 507), the outlet end of the first segment is in communication with the inlet of the temperature-controlled water tank 517, the outlet of the temperature-controlled water tank 517 is in communication with the inlet of the second segment, the outlet of the second segment is in communication with the inlet of the circulating pump 510, the outlet of the circulating pump 510 is connected to the inlet of the third segment, and the outlet of the third segment is in communication with the return port of the cooling pool 507 (which can be provided at the bottom of the cooling pool 507). Under the action of the circulating pump 510, the temperature-controlled water tank 517 and the cooling liquid in the cooling pool 507 circulate, thereby ensuring the temperature of the cooling liquid in the cooling pool 507.

[0047] The outlet of the cooling pool 507 is fixedly installed with an inner tube 521 (the inner tube is located in the cooling pool 507), and a overflow adjusting tube 516 capable of being adjusted in lifting is sleeved on the inner tube 521, the upper end of the overflow adjusting tube 516 is lower than the highest water level of the cooling pool 507, and the cooling liquid in the cooling pool 507 overflows into the water tank 517 with temperature control through the upper end of the overflow adjusting tube 516 (when the lower end of the overflow adjusting tube 516 is closest to the position of the outlet of the cooling pool 507, the upper end of the inner tube 521 is lower than the height of the upper end of the overflow adjusting tube 516), when the overflow adjusting tube 516 is adjusted in lifting, the position of the upper end of the overflow adjusting tube 516 changes, and the water level of the cooling liquid in the cooling pool 507 changes (when the overflow adjusting tube 516 is lowered, the cooling liquid in the cooling pool 507 which is higher than the upper end of the overflow adjusting tube 516 flows into the water tank 517 with temperature control through the overflow adjusting tube 516 and the inner tube 521, and when the overflow adjusting tube 516 is lifted, under the action of the circulating pump 510, the water level of the cooling liquid in the cooling pool 507 gradually rises until the position of the upper end of the overflow adjusting tube 516 is reached).

[0048] Specifically, the lower surface of the vacuum container flange 503 is provided with an annular groove for installing an O-shaped sealing ring, and the upper end of the overflow adjusting tube 516 can be adjusted to be 1-3 mm higher than the lower surface of the vacuum container flange 503, so that the water level of the cooling liquid in the cooling pool 507 is 1-3 mm higher than the lower surface of the vacuum container flange 503. In addition, the overflow adjusting tube 516 and the inner tube 521 can both be circular tubes, the inner diameter of the overflow adjusting tube 516 is gap-fitted with the outer diameter of the inner tube 521, at least two annular grooves are provided on the lower part of the inner circumferential wall of the overflow adjusting tube 516, and sealing rings 522 are installed in the annular grooves (as shown in Figure 5 By installing the sealing rings 522 in the at least two annular grooves, on the one hand, the water seal between the two is ensured, and on the other hand, the sleeve connection between the two is stabilized, avoiding the shaking of the overflow adjusting tube 516 and affecting the sealing performance.

[0049] In order to accurately adjust the temperature of the cooling liquid in the cooling pool 507, a temperature sensor 515 is installed in the cooling pool 507, the temperature sensor 515 can be electrically connected with a controller, and the controller is electrically connected with the circulating pump 510. For example, when the temperature sensor 515 detects that the temperature of the cooling liquid in the cooling pool 507 exceeds the predetermined value by plus or minus 5 degrees Celsius, the circulating pump 510 is started to work, so that the cooling liquid with constant temperature in the water tank 517 with temperature control is circulated to the cooling pool 507 (the water tank 517 with temperature control is an existing component, and the constant temperature adjustment is an existing technology), until the temperature of the cooling liquid in the cooling pool 507 is within the predetermined value by plus or minus 5 degrees Celsius.

[0050] In order to drain the cooling liquid in the cooling pool 507 when not working, the lower part of the cooling pool 507 is provided with a liquid outlet and a drain pipe 508 communicating with the liquid outlet and provided with a drain valve 509. When not working for a long time, the drain valve 509 can be opened, and a bucket is placed at the outlet end of the drain pipe 508 to drain the cooling liquid in the cooling pool 507 into the bucket.

[0051] In order to avoid leakage of the cooling liquid in the cooling pool 507, the bottom of the cooling pool 507 is provided with a through hole, and a sealing seat 514 is mounted in the through hole. The sealing seat 514 is an annular stepped sleeve. The annular flange at the upper part of the sealing seat 514 is locked on the outer periphery of the through hole. The lower part of the sealing seat 514 is indirectly connected to the rotating motor 518. The bearing 511 is mounted in the stepped groove at the center part of the sealing seat 514 (there are two stepped grooves and two bearings 511). The rotating shaft 519 is penetrated in the bearing 511. The boss at the upper end of the rotating shaft 519 is fixedly connected with the clamping seat 513. The diameter of the boss and the clamping seat 513 is equivalent. The rotating sealing ring 512 is mounted between the boss at the upper end of the rotating shaft 519 and the annular flange at the upper part of the sealing seat 514 (the rotating sealing ring 512 can be mounted in the annular groove between the outer peripheral wall of the rotating shaft and the annular flange). The rotating sealing ring 512 can prevent the cooling liquid from penetrating into the inside of the sealing seat 514, which is beneficial to ensure the service life of the rotating shaft and the bearing and ensure the stability of rotation.

[0052] The vacuum container cylinder clamp 502 for clamping the vacuum container cylinder 501 and ensuring that the vacuum container cylinder 501 is coaxial with the vacuum container flange 503 is mounted on the clamp support frame 506. Specifically, the clamp support frame 506 is provided on the two opposite sides of the cooling pool 507 of the cooling device on the platform support frame 504. The clamp support frame 506 includes the vertical plate 5061 and the horizontal plate 5062 vertically connected with the vertical plate. The front end of the horizontal plate is vertically provided with the transverse plate 5063. The horizontal plate is horizontally provided with the horizontal cylinder 5064 consistent with the length direction thereof. The front end (front end face) of the horizontal cylinder is limitingly mounted on the transverse plate. The telescopic rod of the horizontal cylinder 5064 penetrates through the center hole on the transverse plate and is provided with the arc-shaped plate 5065 (the back surface of the arc-shaped plate 5065 is fixedly connected with the free end of the telescopic rod) on the free end of the telescopic rod. The two sides of the arc-shaped plate are fixedly provided with the slide rod 5066 penetrating through the through holes on the two sides of the transverse plate 5063 to realize horizontal sliding. When the telescopic rods of the two horizontal cylinders are elongated, the central axis surrounded by the two arc-shaped plates is coaxial with the rotation center line of the rotating mechanism, that is, the central axis of the vacuum container cylinder 501 clamped by the two arc-shaped plates is coaxial with the central axis of the vacuum container flange 503, which is beneficial to ensure the uniformity of the welding seam (the joint between the vacuum container cylinder 501 and the vacuum container flange 503). The above structure constitutes the vacuum container cylinder clamp 502.

[0053] A flame gun 505 is mounted on the platform support frame. The flame of the flame gun is directed at the joint between the vacuum container cylinder 501 and the vacuum container flange 503. The flame gun 505 is specifically mounted on an adjusting bracket 523, which can adjust the height and swing angle of the flame gun 505 (specifically, as shown in the figure). Figure 4 As shown, the adjusting frame 523 is a plate fixed to the side of the cooling pool 507. Multiple sets of bolt holes are arranged on this plate. The flame gun 505 is secured to the adjusting plate 5051 by screws. The adjusting plate 5051 has a slotted groove. Bolts pass through the slotted groove and are secured to the bolt holes on the adjusting frame 523. The height of the flame gun 505 is adjusted by installing the adjusting plate 5051 at different bolt hole positions. The angle of the flame gun 505 is adjusted by adjusting the position of the flame gun 505 relative to the adjusting plate 5051 with screws, thereby adjusting the optimal spray angle of the flame gun 505. The distance between the flame gun 505 and the joint between the vacuum container cylinder 501 and the vacuum container flange 503 is approximately 100-200 mm. The temperature of the flame jet from the flame gun 505 at the joint between the vacuum container cylinder 501 and the vacuum container flange 503 is 100-250 degrees Celsius, preferably 150 degrees Celsius.

[0054] The welding process of the vacuum container sleeve and flange of this utility model is as follows:

[0055] Step 1: Place the vacuum container flange on the chuck (which can be a three-jaw chuck 513), and clamp and fix the vacuum container flange 503 by locking the chuck;

[0056] Step 2: Place the vacuum container body 501 onto the vacuum container flange 503;

[0057] Step 3: The vacuum container cylinder clamp 502 is activated, that is, the vacuum container cylinder is pushed by two horizontal cylinders, so that the vacuum container cylinder is concentric with the vacuum container flange.

[0058] Step 4: Release the clamp 502 on the vacuum container body (i.e., the horizontal cylinder retracts), and drive the vacuum container flange and vacuum container body to rotate synchronously by the rotating mechanism (the rotating motor works, driving the rotating shaft 519, chuck 513 and the vacuum container flange and vacuum container body on it to rotate synchronously).

[0059] Step 5: open the flame gun to the vacuum container flange and the vacuum container cylinder seam preheating, the flame gun flame jet position opposite the weld seam position, the temperature of the flame jet in the weld seam position is 100-250 degrees Celsius, the driving motor drives the chuck to rotate the vacuum container flange and the vacuum container cylinder one circle per minute, the heating time is 2-7 minutes to eliminate internal stress, preferably the temperature of the flame jet in the weld seam position is 150 degrees Celsius, preferably the heating time is 5 minutes (i.e. the vacuum container flange and the vacuum container cylinder rotate 5 times, and the flame jet welds the weld seam 5 times, so as to ensure uniform preheating);

[0060] Step 6: After preheating, the vacuum container flange and the vacuum container cylinder are positioned and welded by the welding equipment on the manipulator using spot welding, the positioning weld has four points, the four positioning welds are 90° apart, and the bottom surface welding is performed using the back welding method, i.e. the entire circumferential joint is divided into 4 short welds (i.e. a short weld between two spot welding points), each segment is welded from back to front, and the end point of each segment coincides with the starting point of the previous segment. When the current segment is welded and reaches the starting point of the previous segment, the temperature of the starting point is still high, so the temperature difference is not large. In this way, the degree of uneven heating and cooling is improved, and the stress and deformation after welding are reduced;

[0061] Step 7: Then open the circulating pump 510, and the cooling liquid flows into the cooling pool 507. Adjust the height of the overflow adjusting pipe 516 to ensure that the cooling liquid is 1-3 mm higher than the lower surface of the vacuum container flange (the lower surface of the vacuum container flange 503 is provided with an annular groove for installing an O-shaped sealing ring). The cooling liquid can be uniformly cooled by being 1-3 mm higher than the lower surface of the vacuum container flange, which can reduce the residual stress on the vacuum container flange and reduce the deformation of the welded part;

[0062] Step 8: Turn on the welding equipment on the manipulator to fill 3 passes of welding on the joint between the vacuum container flange and the vacuum container cylinder, and complete the welding after 1 pass of cap welding. Start the temperature control water tank and circulating pump to control the cooling liquid temperature at 65-75°C; ensure uniform heating of the welded part during welding, reduce residual stress and deformation;

[0063] Step 9: After welding, disassemble the vacuum container.

[0064] The thickness of the flange plate in the above step is 10 mm, the thickness of the cylinder plate is 5 mm, the diameter of the cylinder is 200 mm, the diameter of the flange plate is 250-300 mm, the material is 304 stainless steel, the flange plate is opened with a single V-shaped groove, the groove angle is 55°, the blunt edge is 2 mm, the cooling liquid temperature is set to 70 DEG C, argon arc welding is adopted, the purity of argon is 99.99%, the current of the welding equipment is 125 A, the welding voltage is 22 V, the welding wire is a flux-cored wire, the welding speed is 60-90 mm / min, the acetylene pressure of the flame gun is adjusted to 0.05 MPa, the oxygen pressure is adjusted to 0.2 MPa, the temperature of the flame jet at the welding seam position is 150 DEG C, and the heating time is 5 minutes to eliminate internal stress.

[0065] After the preheating in the above step and before spot welding, the vacuum container cylinder and the vacuum container flange are guaranteed to be concentric through the action (expansion and contraction action) of the two horizontal air cylinders (since the flame thrust of preheating may cause the two to be eccentric, therefore, the re-centering before welding in multiple sections can ensure that the two are concentric).

[0066] The advantages of the utility model are:

[0067] 1. The application sets the flame gun to preheat the joint between the vacuum container flange and the vacuum container cylinder to eliminate internal stress, thereby improving the welding quality from the first level;

[0068] 2. The application sets a cooling device, the cooling liquid is a glycol type cooling liquid, and the welding temperature is maintained at a certain temperature to make the deformation of the welded vacuum container flange small, thereby playing a role in the quality of welding from the second level;

[0069] 3. The application sets a vacuum container cylinder clamp, which can guarantee the concentricity of the vacuum container cylinder and the vacuum container flange, thereby improving the welding quality from the third level;

[0070] 4. The application sets a temperature sensor and a circulating pump in the cooling device, and the temperature control water tank can accurately control the temperature of the cooling liquid to accurately control the temperature of the cooling liquid;

[0071] 5. The application sets an overflow adjusting pipe and an O-ring in the cooling pool, which can adjust the liquid level of the cooling liquid to be 1-3 mm below the lower surface of the flange according to different workpieces, so as to realize the maximum reduction of deformation.

[0072] The above only describes preferred embodiments of the utility model and is not used to limit the utility model, and the utility model can be changed and varied in various ways for those skilled in the art.

Claims

1. A vacuum vessel sleeve and flange welding apparatus characterized by: The application relates to a welding platform (5) with a cooling device and a welding manipulator (3), wherein the welding platform (5) comprises a platform support frame (504), a cooling device arranged on the platform support frame (504) and a clamp support frame (506), a vacuum container flange (503) is arranged in the cooling device, a vacuum container cylinder clamp (502) for clamping a vacuum container cylinder (501) and ensuring that the vacuum container cylinder (501) is coaxial with the vacuum container flange (503) is arranged on the clamp support frame (506), a welding torch for welding a joint between the vacuum container cylinder and the vacuum container flange is arranged on the welding manipulator, a flame gun (505) is arranged on the platform support frame, the flame of the flame gun is directed to the joint between the vacuum container cylinder (501) and the vacuum container flange (503), and a rotating mechanism for driving the vacuum container flange (503) and the vacuum container cylinder (501) to rotate synchronously is arranged in the cooling device.

2. The vacuum vessel sleeve and flange welding apparatus of claim 1, wherein: The cooling device comprises a cooling pool (507) and a rotating mechanism connected to the cooling pool (507), the rotating mechanism comprises a chuck (513) for clamping the vacuum container flange (503) in the cooling pool (507), a rotating shaft (519) fixedly connected with the chuck (513) and a rotating motor (518) arranged outside the cooling pool (507), the rotating motor (518) drives the chuck (513) and the vacuum container flange (503) on the chuck (513) to rotate by driving the rotating shaft (519) to rotate, a circulating pump (510), a temperature control water tank (517) and a circulating pipeline (520) in communication with the cooling pool (507), the circulating pump (510) and the temperature control water tank (517) are arranged below the cooling pool (507).

3. The vacuum vessel sleeve and flange welding apparatus of claim 2, wherein: The circulating pipeline (520) comprises three sections, namely a first section, a second section and a third section, the inlet end of the first section is in communication with the liquid outlet of the cooling pool (507), the outlet end of the first section is in communication with the inlet end of the temperature control water tank (517), the outlet end of the temperature control water tank (517) is in communication with the inlet end of the second section, the outlet end of the second section is in communication with the inlet end of the circulating pump (510), the outlet end of the circulating pump (510) is connected with the inlet end of the third section, and the outlet end of the third section is in communication with the liquid return port of the cooling pool (507).

4. The vacuum vessel sleeve and flange welding apparatus of claim 3, wherein: An inner pipe (521) is fixedly arranged on the liquid outlet of the cooling pool (507), an overflow adjusting pipe (516) capable of being adjusted in lifting is sleeved on the inner pipe (521), the upper end of the overflow adjusting pipe (516) is lower than the highest water level of the cooling pool (507), and the cooling liquid in the cooling pool (507) overflows into the temperature control water tank (517) through the upper end of the overflow adjusting pipe (516); the cooling liquid in the cooling pool (507) is ethylene glycol type cooling liquid.

5. The vacuum vessel sleeve and flange welding apparatus of claim 4, wherein: A temperature sensor (515) is arranged in the cooling pool (507).

6. The vacuum vessel sleeve and flange welding apparatus of claim 4, wherein: A drain port and a drain pipe (508) with a drain valve (509) in communication with the drain port are arranged at the lower part of the cooling pool (507).

7. The apparatus of claim 3, wherein: The bottom of the cooling pool (507) is provided with a through hole, a sealing seat (514) is installed in the through hole, the sealing seat (514) is an annular stepped sleeve, an annular flange on the upper part of the sealing seat (514) is locked on the outer periphery of the through hole, the lower part of the sealing seat (514) is connected with a rotary motor (518), a bearing (511) is installed in the central part stepped groove of the sealing seat (514), the rotary shaft (519) is arranged in the bearing (511), the boss on the upper end of the rotary shaft (519) is fixedly connected with the clamping seat (513), and a rotary sealing ring (512) is arranged between the boss on the upper end of the rotary shaft (519) and the annular flange on the upper part of the sealing seat (514).

8. The apparatus of claim 4, wherein: The lower surface of the vacuum container flange (503) is provided with an annular groove for installing a sealing ring, and the upper end of the overflow adjusting pipe (516) is 1-3 mm higher than the lower surface of the vacuum container flange (503).

9. The apparatus of claim 1, wherein: Two pairs of clamping support frames (506) are arranged on the platform support frame (504) on both sides of the cooling pool (507) of the cooling device, the clamping support frame (506) comprises an upright plate (5061) and a horizontal plate (5062) connected perpendicularly with the upright plate, a transverse plate (5063) is arranged perpendicularly on the front end of the horizontal plate, a horizontal cylinder (5064) is arranged horizontally on the horizontal plate, the front end of the horizontal cylinder is limitingly arranged on the transverse plate, the telescopic rod of the horizontal cylinder passes through the center hole on the transverse plate and is provided with an arc-shaped plate (5065) on the free end of the telescopic rod, slide rods (5066) are fixedly arranged on both sides of the arc-shaped plate, the slide rods pass through the through holes on both sides of the transverse plate to realize horizontal sliding, and when the telescopic rods of the two horizontal cylinders are elongated, the central axis surrounded by the arc-shaped plate is coaxial with the rotation center line of the rotating mechanism.

10. The welding process for a vacuum vessel according to claim 9, characterized in that: An adjusting frame (523) in the form of a plate body is fixed on the side of the cooling pool (507), a plurality of bolt holes are arranged on the plate body, the flame gun (505) is locked on the adjusting plate (5051) through bolts, and a strip-shaped groove is arranged on the adjusting plate (5051), the bolts pass through the strip-shaped groove and are locked with the bolt holes on the adjusting frame (523).

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