Cooling device of sleeve and flange welding equipment

Abstract

The utility model relates to a cooling device of sleeve and flange welding equipment, which is characterized by comprising a cooling pool and a rotating mechanism connected on the cooling pool, the rotating mechanism comprises a chuck which is positioned in the cooling pool and is used for clamping a vacuum container flange, a rotating shaft fixedly connected with the chuck and a rotating motor positioned below the cooling pool, the rotating motor drives the rotating shaft to rotate to drive the chuck and the vacuum container flange on the chuck to rotate, and a circulating pump, a water tank with temperature control and a circulating pipeline communicated with the cooling pond, the circulating pump and the water tank with temperature control are arranged below the cooling pond so that circulating flow and temperature control of cooling liquid in the cooling pond can be achieved. According to the cooling device of the sleeve and flange welding equipment, deformation of a welded vacuum container flange can be small, and the cooling device plays a role in welding quality.

Description

TECHNICAL FIELD

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

[0002] The vacuum container includes a vacuum container cylinder and a vacuum container flange. When the vacuum container cylinder and the vacuum container flange are assembled and welded, the vacuum container flange has an O-ring groove, which changes the shape and stress distribution of the welding structure. When welding, the weld and its surrounding area will expand due to heat. The constraint conditions of thermal expansion at the edges and corners of the groove become complex. Inside the groove, the shrinkage force may concentrate on certain points or lines, unlike in the groove-free structure, which can be more evenly distributed on the entire weld surface. This uneven shrinkage force can easily cause deformation, such as distorting the shape of the groove or bending the entire weld with the groove. Furthermore, the heat cycle during welding becomes more complex in the presence of the groove. Due to the presence of the groove, the heat transfer rate inside and outside the groove is different, which can form a local heat concentration area near the groove. This causes the metal material around the groove to experience different degrees of heat cycle at different locations, leading to different changes in material properties in different areas, further increasing the likelihood of deformation. This stress can cause the structure to deform or even crack during use. Vacuum containers require high vacuum and are difficult to detect for vacuum leakage. Therefore, the flange must not deform during welding, and the weld must be stable. Current welding equipment and tooling cannot improve the problem of non-deformation of the flange with an O-ring groove during welding.

[0003] Currently, the Chinese patent "Welding and cooling device of high-frequency pipe welding unit" (CN218694862U) has been retrieved. It includes a rack, a cooling nozzle, a cooling nozzle located outside the high-frequency welded pipe and used for spraying water on the outer wall of the high-frequency welded pipe, an outer sleeve, and a liquid storage box. The outer sleeve is installed horizontally on the rack, and the outer sleeve has a cooling channel through which the high-frequency welded pipe passes. The cooling nozzle is installed on the inner wall of the cooling channel and opposite to the high-frequency welded pipe. The liquid storage box is installed on the rack and located at one end of the outer sleeve to collect the liquid in the cooling channel. The welding and cooling device of the high-frequency pipe welding unit avoids the splashing of cooling liquid on the high-frequency welded pipe, collects the cooling liquid in the cooling channel, and facilitates the storage of the cooling liquid for the high-frequency welded pipe. However, this patent cannot improve the problem of deformation of the vacuum container flange with an O-ring groove during welding. SUMMARY

[0004] In view of the above-mentioned deficiencies of the prior art, the cooling device for sleeve and flange welding equipment is designed rationally, and is favorable for improving the deformation problem of the vacuum container flange welding with O-ring groove.

[0005] The cooling device for sleeve and flange welding equipment has the characteristics that the cooling device comprises a cooling pool and a rotating mechanism connected to the cooling pool, the rotating mechanism comprises a chuck for clamping the vacuum container flange in the cooling pool, a rotating shaft fixedly connected with the chuck, and a rotating motor located below the cooling pool, the rotating motor drives the rotating shaft to rotate to drive the chuck, the vacuum container flange and the vacuum container cylinder to rotate, and a circulating pump, a temperature control water tank and a circulating pipeline in communication with the cooling pool, the circulating pump and the temperature control water tank are arranged below the cooling pool.

[0006] Preferably, the circulating pipeline comprises three sections, i.e., 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, the outlet end of the first section is in communication with the inlet end of the temperature control water tank, the outlet end of the temperature control water tank 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, the outlet end of the circulating pump 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.

[0007] Preferably, an inner tube is fixedly installed on the liquid outlet of the cooling pool, an overflow adjusting pipe capable of being adjusted in lifting is sleeved on the inner tube, the upper end of the overflow adjusting pipe is lower than the highest water level of the cooling pool, and the cooling liquid of the cooling pool overflows into the temperature control water tank through the upper end of the overflow adjusting pipe.

[0008] Preferably, a temperature sensor is installed in the cooling pool to adjust the temperature of the cooling liquid in the cooling pool.

[0009] Preferably, a drain port and a drain pipe with a drain valve in communication with the drain port are arranged at the lower part of the cooling pool.

[0010] Preferably, a through hole is arranged at the bottom of the cooling pool, a sealing seat is installed in the through hole, the sealing seat is an annular stepped sleeve, an 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 with the rotating motor, a bearing is installed in the stepped groove at the center part of the sealing seat, the rotating shaft is arranged in the bearing, the boss at the upper end of the rotating shaft is fixedly connected with the chuck, and a rotary sealing ring is arranged between the boss at the upper end of the rotating shaft and the annular flange at the upper part of the sealing seat.

[0011] Preferably, an annular groove for installing a sealing ring is arranged on the lower surface of the vacuum container flange, and the upper end of the overflow adjusting pipe is 1-3 mm higher than the lower surface of the vacuum container flange, so that the water level of the cooling liquid of the cooling pool is 1-3 mm higher than the lower surface of the vacuum container flange.

[0012] Preferably, both the overflow regulating pipe and the inner pipe are circular pipes, and the overflow regulating pipe and the inner pipe are fitted with a clearance.

[0013] Preferably, the lower part of the inner peripheral wall of the overflow regulating pipe is provided with at least two annular grooves, and a sealing ring is installed in the annular groove.

[0014] Preferably, a flame gun is provided on the side of the cooling pool, and the flame of the flame gun is directed at the joint between the vacuum container cylinder and the vacuum container flange.

[0015] Advantages of this utility model:

[0016] 1. This application includes a cooling device, which maintains the welding temperature at a certain level, resulting in less deformation of the welding vacuum container flange and thus improving the welding quality.

[0017] 2. This application includes a temperature sensor and a circulating pump in the cooling device, and the temperature-controlled water tank can accurately control the temperature of the coolant.

[0018] 3. This application is equipped with an overflow regulating pipe and an O-ring in the cooling pool to adjust the coolant level so that it is 1-3mm above the lower surface of the flange, depending on the workpiece, so as to minimize the amount of deformation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 It is a 3D diagram of the welding equipment for vacuum containers;

[0021] Figure 2 yes Figure 1 A partial 3D view;

[0022] Figure 3 yes Figure 2 Cross-sectional view;

[0023] Figure 4 yes Figure 2 A partial view from another perspective;

[0024] Figure 5 , Figure 6 yes Figure 3 A partial view.

[0025] The central control reset foot pedal and the combined connection mode thereof will be further described in detail below in combination with the drawings and specific implementation structures. DETAILED DESCRIPTION

[0026] To make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of 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.

[0027] A vacuum container cylinder and flange welding device 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 and a welding torch is installed on the welding swing head 4; 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 omnidirectionally on the end of the welding manipulator), the welding torch can realize welding on any welding position, and how the transverse linear track 2, the welding manipulator 3 and the welding swing head 4 move is the prior art and will not be described here.

[0028] A welding machine 7 and a wire feeder 8 are arranged beside the transverse linear track 2, and the welding machine 7 and the wire feeder 8 belong to part of the welding device to realize welding action, and an 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, which is the prior art and will not be described here.

[0029] The above 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.

[0030] The welding platform 5 comprises a platform support frame 504 (such as a shelf in a rectangular body shape) shown in the drawings, a cooling device arranged on the platform support frame 504 and a clamp support frame 506. Figure 2 The vacuum container flange 503 and the like are installed in the cooling device.

[0031] 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) located in the cooling pool 507 for clamping the vacuum container flange 503, a rotating shaft 519 fixedly connected with the chuck 513, and a rotating motor 518 (which includes a speed reducer, etc.) located below the cooling pool 507, when the rotating motor 518 works, it drives the rotating shaft 519, the chuck 513 and the vacuum container flange 503 installed thereon to rotate in turn. A circulating pump 510, a temperature-controlled water tank 517 (which can control the temperature of the cooling liquid therein, and is an existing component) and a circulating pipeline 520 communicating with the cooling pool 507, the circulating pump 510 and the temperature-controlled water tank 517 are arranged below the cooling pool 507, through the action of the circulating pump 510, the temperature-controlled water tank 517 and the cooling liquid in the cooling pool 507 realize circulating flow, the above-mentioned cooling liquid can be water, ethylene glycol type cooling liquid, etc.

[0032] In order to realize the circulation of the cooling liquid, the circulating pipeline 520 includes three segments, which are a first segment, a second segment and a third segment, the inlet end of the first segment communicates with the liquid outlet (arranged at the bottom of the cooling pool 507) of the cooling pool 507, the outlet end of the first segment communicates with the inlet end of the temperature-controlled water tank 517, the outlet end of the temperature-controlled water tank 517 communicates with the inlet end of the second segment, the outlet end of the second segment communicates 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 segment, and the outlet end of the third segment communicates with the liquid return port (which can be arranged at the bottom of the cooling pool 507) 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 realize circulating flow, thereby ensuring the temperature of the cooling liquid in the cooling pool 507.

[0033] The inner tube 521 is fixedly installed on the liquid outlet of the cooling pool 507 (the inner tube is located in the cooling pool 507), the overflow adjusting pipe 516 capable of being adjusted in lifting is sleeved on the inner tube 521, the upper end of the overflow adjusting pipe 516 is lower than the highest water level of the cooling pool 507, the cooling liquid in the cooling pool 507 overflows into the temperature-controlled water tank 517 through the upper end of the overflow adjusting pipe 516 (when the lower end of the overflow adjusting pipe 516 is closest to the position of the liquid 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 pipe 516), when the overflow adjusting pipe 516 is adjusted in lifting, the position of the upper end of the overflow adjusting pipe 516 changes, and the water level of the cooling liquid in the cooling pool 507 changes (when the overflow adjusting pipe 516 is lowered, the cooling liquid in the cooling pool 507 which is higher than the upper end of the overflow adjusting pipe 516 flows into the temperature-controlled water tank 517 through the overflow adjusting pipe 516 and the inner tube 521, when the overflow adjusting pipe 516 is lifted, under the action of the circulating pump 510, the cooling liquid level in the cooling pool 507 gradually rises until the position of the upper end of the overflow adjusting pipe 516 is reached).

[0034] 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 pipe 516 can be adjusted to be 1-3 mm higher than the lower surface of the vacuum container flange 503, so as to realize that the cooling liquid level of the cooling pool 507 is 1-3 mm higher than the lower surface of the vacuum container flange 503. In addition, the overflow adjusting pipe 516 and the inner pipe 521 can both be circular pipes, the inner diameter of the overflow adjusting pipe 516 is in clearance fit with the outer diameter of the inner pipe 521, at least two annular grooves are arranged at the lower part of the inner circumferential wall of the overflow adjusting pipe 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 stable, avoiding the shaking of the overflow adjusting pipe 516 and affecting the sealing.

[0035] 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, which can be electrically connected with a controller, and the controller is electrically connected with a 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 as to circulate the cooling liquid with constant temperature in the water tank 517 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.

[0036] In order to drain the cooling liquid in the cooling pool 507 when not working, the lower part of the above-mentioned cooling pool 507 is provided with a drain port and a drain pipe 508 with a drain valve 509 communicating with the drain port. When not working for a long time, the drain valve 509 can be opened, and a water bucket is placed at the outlet end of the drain pipe 508, so as to drain the cooling liquid in the cooling pool 507 into the water bucket.

[0037] In order to avoid the 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 installed 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 with the rotating motor 518. The central part of the sealing seat 514 is provided with a bearing 511 (two stepped grooves and two bearings 511) installed in the stepped groove. The rotating shaft 519 is arranged in the bearing 511. The boss at the upper end of the rotating shaft 519 is fixedly connected with the chuck 513. The diameter of the boss and the chuck 513 is equivalent. The rotating seal ring 512 is installed 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 seal ring 512 can be installed in the annular groove between the outer peripheral wall of the rotating shaft and the annular flange). The rotating seal ring 512 can prevent the cooling liquid from seeping into the inside of the sealing seat 514, which is beneficial to the service life of the rotating shaft and the bearing and the stability of the rotation.

[0038] 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 installed on the clamp support frame 506. Specifically, the clamp support frame 506 is arranged on the platform support frame 504 and located at two opposite sides of the cooling pool 507 of the cooling device. The clamp support frame 506 includes a vertical plate 5061 and a horizontal plate 5062 which is vertically connected with the vertical plate. The front end of the horizontal plate is vertically provided with a transverse plate 5063. The horizontal plate is horizontally provided with a horizontal cylinder 5064 which is consistent with the length direction of the horizontal plate. The front end (front end face) of the horizontal cylinder is limitingly installed on the transverse plate. The telescopic rod of the horizontal cylinder 5064 penetrates through the center hole of the transverse plate and is provided with an arc-shaped plate 5065 (the back surface of the arc-shaped plate 5065 is fixedly connected with the free end of the telescopic rod) at the free end of the telescopic rod. The two sides of the arc-shaped plate are fixedly provided with slide rods 5066 which penetrate through the through holes of 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, so as to be beneficial to ensuring 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.

[0039] The flame gun 505 is installed on the platform support frame. The flame of the flame gun directly faces the joint between the vacuum container cylinder 501 and the vacuum container flange 503. The flame gun 505 is specifically installed on an adjusting frame 523 which can adjust the height and swing angle of the flame gun 505 (specifically, as shown in the figure, the adjusting frame 523 is provided with a horizontal adjusting rod 5231 and a vertical adjusting rod 5232. The horizontal adjusting rod 5231 is provided with a horizontal adjusting handle 5233. The vertical adjusting rod 5232 is provided with a vertical adjusting handle 5234. The horizontal adjusting handle 5233 and the vertical adjusting handle 5234 can be used to adjust the height and swing angle of the flame gun 505). Figure 4As shown, the adjusting frame 523 is a plate body fixed on the side of the cooling pool 507, and a plurality of bolt holes are arranged on the plate body. The flame gun 505 is locked on the adjusting plate 5051 by screws. The adjusting plate 5051 is provided with a strip-shaped slot. The bolt passes through the strip-shaped slot and is locked on the bolt hole on the adjusting frame 523. The height of the flame gun 505 is adjusted by installing the adjusting plate 5051 at different height positions of the bolt hole. The position of the flame gun 505 relative to the adjusting plate 5051 is adjusted by the screw, so as to adjust the optimal spraying angle of the flame gun 505. The distance between the flame gun 505 and the joint of the vacuum container cylinder 501 and the vacuum container flange 503 is about 100-200 mm. The temperature of the spraying flame of the flame gun 505 at the joint of the vacuum container cylinder 501 and the vacuum container flange 503 is 100-250 degrees Celsius, and preferably 150 degrees Celsius.

[0040] Welding process of the vacuum container cylinder and the flange:

[0041] 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.

[0042] Step 2: Place the vacuum container cylinder 501 on the vacuum container flange 503.

[0043] Step 3: The vacuum container cylinder clamp 502 is actuated, that is, the vacuum container cylinder is pushed by the two horizontal cylinders, so that the vacuum container cylinder is concentric with the vacuum container flange.

[0044] Step 4: Release the clamping of the vacuum container cylinder by the vacuum container cylinder clamp 502 (that is, the horizontal cylinder is retracted), and drive the vacuum container flange and the vacuum container cylinder to rotate synchronously by the rotating mechanism (the rotating motor works to drive the rotating shaft 519, the chuck 513, and the vacuum container flange and the vacuum container cylinder on the chuck to rotate synchronously).

[0045] Step 5: Open the flame gun to preheat the joint of the vacuum container flange and the vacuum container cylinder by spraying flame. The flame spraying position of the flame gun is directly opposite the welding joint position. The temperature of the flame spraying at the welding joint position is 100-250 degrees Celsius. The chuck is driven by the driving motor to drive the vacuum container flange and the vacuum container cylinder to rotate one circle per minute. The heating time is 2-7 minutes to eliminate internal stress. The temperature of the flame spraying at the welding joint position is preferably 150 degrees Celsius. The preferred heating time is 5 minutes (that is, the vacuum container flange and the vacuum container cylinder rotate 5 circles, and the flame sprays 5 times on the welding joint, so as to ensure uniform preheating).

[0046] Step 6: After the preheating is completed, the joint between the vacuum vessel flange and the vacuum vessel cylinder is positioned and welded by the welding equipment on the manipulator using spot welding. There are four positioning welds, each 90° apart. Then, the bottom surface of the weld is welded using the back-chipping method, i.e., the entire circumference of the joint is divided into four short welds (i.e., a short weld between two spot welds). 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 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. This improves the degree of uneven heating and cooling, reducing the stress and deformation after welding.

[0047] Step 7: Then, open the circulating pump 510 to flow the cooling liquid into the cooling pool 507. Adjust the height of the overflow adjustment pipe 516 to ensure that the cooling liquid is 1-3 mm above the lower surface of the vacuum vessel flange. The lower surface of the vacuum vessel flange 503 is provided with an annular groove for installing an O-ring. The cooling liquid passing through the lower surface of the vacuum vessel flange by 1-3 mm can uniformly cool and reduce the residual stress on the vacuum vessel flange and the deformation of the welded part.

[0048] Step 8: Turn on the welding equipment on the manipulator to perform three passes of fill welding and one pass of cap welding on the joint between the vacuum vessel flange and the vacuum vessel cylinder. After the cap welding, the welding is completed. The temperature control water tank and circulating pump are started to control the cooling liquid temperature at 65-75°C. This ensures uniform heating of the welded part during welding, reducing residual stress and deformation.

[0049] Step 9: After the welding is completed, disassemble the vacuum vessel.

[0050] In the above steps, the thickness of the flange plate 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°, and the blunt edge is 2 mm. The cooling liquid temperature is set to 70°C. Argon arc welding is used, the purity of argon gas is 99.99%, the current of the welding equipment is 125A, the welding voltage is 22V, the welding wire is flux-cored wire, the welding speed is 60-90 mm / min, the acetylene pressure of 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 joint position is 150°C, and the heating time is 5 minutes to eliminate internal stress.

[0051] After the preheating of the above steps is completed and before spot welding, the action (extension and retraction) of the two horizontal cylinders is used again to ensure the concentricity of the vacuum vessel cylinder and the vacuum vessel flange (since the preheating flame thrust may cause the two to be eccentric, so the re-centering before multiple small segment welding can ensure the concentricity of the two).

[0052] The welding equipment for the vacuum vessel cylinder and the flange has the following advantages:

[0053] 1. The flame gun is arranged 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;

[0054] 2. The cooling device is arranged, the cooling liquid is ethylene glycol type cooling liquid, the welding temperature is kept at a certain temperature, the deformation of the welded vacuum container flange is small, and the quality of the welding plays a role in the second level;

[0055] 3. The vacuum container cylinder clamp is arranged, the concentricity of the vacuum container cylinder and the vacuum container flange can be ensured, and the welding quality is improved in the third level;

[0056] 4. The temperature sensor and the circulating pump are arranged 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;

[0057] 5. The overflow adjusting pipe and the O-shaped ring are arranged in the cooling pool, the liquid level of the cooling liquid can be adjusted to be 1-3mm higher than the lower surface of the flange according to different workpieces, and the deformation amount is reduced to the maximum extent.

[0058] The above only describes preferred embodiments of the utility model and is not used to limit the utility model. For those skilled in the art, the utility model can be changed and varied.

Claims

1. A cooling device for a sleeve-to-flange welding apparatus, characterized by: The cooling pool (507) is provided below with a circulating pump (510), a temperature-controlled water tank (517), and a circulating pipeline (520) in communication with the cooling pool (507), the circulating pump (510), and the temperature-controlled water tank (517).

2. The cooling device for sleeve-to-flange welding apparatus according to claim 1, characterized by: 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-controlled water tank (517), the outlet end of the temperature-controlled 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 to 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).

3. The cooling arrangement for a sleeve-to-flange welding apparatus of claim 2, wherein: The cooling pool (507) is provided with a temperature sensor (515) for detecting the temperature of the cooling liquid in the cooling pool (507).

4. The cooling arrangement for a sleeve-to-flange welding apparatus of claim 3, wherein: The lower part of the cooling pool (507) is provided with a liquid discharge port and a drain pipe (508) with a drain valve (509) in communication with the liquid discharge port.

5. The cooling arrangement for a sleeve-to-flange welding apparatus of claim 4, wherein: The bottom of the cooling pool (507) is provided with a through hole, and a sealing seat (514) is installed in the through hole. The sealing seat (514) is an annular stepped sleeve. The annular flange on the upper part of the sealing seat (514) is locked on the outer periphery of the through hole, and the lower part of the sealing seat (514) is connected to the rotating motor (518). A bearing (511) is installed in the stepped groove in the center of the sealing seat (514). The rotating shaft (519) is arranged in the bearing (511). The boss on the upper end of the rotating shaft (519) is fixedly connected to the chuck (513). A rotary sealing ring (512) is installed between the boss on the upper end of the rotating shaft (519) and the annular flange on the upper part of the sealing seat (514).

6. The cooling arrangement for a sleeve-to-flange welding apparatus of claim 5, wherein: The lower surface of the vacuum container flange (503) is provided with an annular groove for installing a sealing ring. The upper end of the overflow adjusting pipe (516) is 1-3 mm higher than the lower surface of the vacuum container flange (503).

7. The cooling arrangement for a sleeve-to-flange welding apparatus of claim 6, wherein: ​ 8. The cooling arrangement for a sleeve-to-flange welding apparatus of claim 3, wherein: The overflow adjusting pipe (516) and the inner pipe (521) are circular pipes, and the overflow adjusting pipe (516) is in clearance fit with the inner pipe (521).

9. The cooling arrangement for a sleeve-to-flange welding apparatus of claim 8, wherein: The inner peripheral wall of the overflow adjusting pipe (516) is provided with at least two annular grooves, and a sealing ring (522) is arranged in the annular grooves.

10. The cooling arrangement for a sleeve-to-flange welding apparatus of claim 9, wherein: The cooling pool (507) is provided with a flame gun (505) on the side, and the flame of the flame gun is opposite to the joint between the vacuum container cylinder (501) and the vacuum container flange (503).

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