Impeller welding apparatus and welding method thereof

Abstract

The application relates to the field of welding, in particular to a vane welding device and a welding method thereof. The device comprises a base, a circular embedding groove is arranged at the center position of the base, a plurality of first limiting grooves are uniformly arranged on the base part in the embedding groove, a limiting block is fixed in the first limiting groove, the top of the limiting block exceeds the bottom surface of the embedding groove, a rotating disc is sleeved on the part of the limiting block exceeding the bottom surface of the embedding groove, a second limiting groove through which the limiting block passes is arranged on the rotating disc, a vane locking groove is arranged between the second limiting groove and the limiting block, a rotating mechanism is arranged on the rotating disc, and an electrode is arranged above the rotating disc. Through the arrangement of the rotating disc and the vane locking groove and other structures, the vane locking groove can realize automatic zooming, can adapt to vanes with different thicknesses, has wide adaptability, is convenient for placing the vane, does not cause damage to the vane in the placing process, and greatly facilitates cleaning of the vane locking groove.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of welding, in particular to a kind of impeller welding equipment and welding method thereof. BACKGROUND

[0002] Impeller in the process of production, multiple blades and cover plate need to be welded, blade and cover plate welding process needs to be positioned to blade and cover plate tooling.For example, the patent with application No.CN202420016946.6 discloses a kind of centrifugal fan impeller welding tooling, the tooling is positioned to blade by blade socket, that is, by the way of inserting blade directly into blade socket to position blade, this kind of positioning blade exists following disadvantages:1) The size of blade socket is fixed, so the blade socket can only adapt to one size blade, very limited;2) Once blade socket adheres to dirt, it is very troublesome to clean up, also affects the insertion of blade, even causes damage to blade;3) Since the size of blade needs to be completely matched with the size of blade socket, that is, the four side walls of blade need to be in contact with the four inner walls of blade socket, so that the outer wall of blade is inevitably scraped with the inner wall of blade socket during insertion into blade socket, thereby causing damage to the outer wall of blade;4) The tooling cannot remove high-temperature waste gas generated during welding, thereby causing serious pollution to air, so there is an urgent need for an impeller welding equipment that can adapt to multiple sizes of blades, is easy to clean, is not easy to cause damage to blades, and can timely remove high-temperature waste gas generated during welding. SUMMARY

[0003] (I) Technical problems solved

[0004] In view of the deficiencies of the prior art, the present application aims to provide an impeller welding equipment and welding method thereof, which solves the problems existing in the prior art. The impeller welding equipment can adapt to multiple sizes of blades, is easy to clean, is not easy to cause damage to blades when placing blades, and can timely remove high-temperature waste gas generated during welding, thereby protecting the environment well.

[0005] (II) Technical solutions

[0006] In order to achieve the above object, the present application provides the following technical scheme: A kind of impeller welding equipment, including base, the center position of base is provided with circular embedded slot, the part of base in embedded slot is uniformly provided with several first limit slot, limiting block is fixed in first limit slot, the top of limiting block exceeds the bottom surface of embedded slot, the part of limiting block exceeding embedded slot bottom surface is sleeved with rotary table, second limit slot is opened in rotary table, and blade locking groove is arranged between second limit slot and limiting block, rotary table is equipped with rotating mechanism, and the top of rotary table is equipped with electrode.

[0007] Preferably, the rotating mechanism includes two air cylinders arranged symmetrically on both sides of the rotary table, the air cylinders are fixed on the base, the piston rod end of the air cylinder is fixed with a telescopic connecting rod, the telescopic connecting rod is slidably connected with the base, and a plurality of teeth are arranged on the surface of the telescopic connecting rod facing the rotary table, and the rotary table is provided with a tooth groove matched with the teeth at a position opposite to the teeth.

[0008] Preferably, the blade locking groove includes a first arc surface, a first limiting surface is connected to the inner end of the first arc surface, the first limiting surface and the first arc surface are arranged on the limiting block, the first limiting surface is connected with a second arc surface, the outer end of the second arc surface is connected with a second limiting surface, and the second arc surface and the second limiting surface are arranged on the second limit slot.

[0009] Preferably, a first heat preservation layer is fixed on the first arc surface, and a second heat preservation layer is fixed on the second arc surface.

[0010] Preferably, the rotary table is hollow, which includes an outer annular portion, a plurality of partition blocks are communicated with the outer annular portion, the inner end of the partition block is communicated with an inner annular portion, a positioning column is fixed at the middle position of the inner annular portion, a ring-shaped air suction cover is arranged on the top surface of the outer annular portion, the ring-shaped air suction cover is hollow, the bottom of the ring-shaped air suction cover is communicated with the outer annular portion, a plurality of air suction holes are arranged on the inner wall surface of the ring-shaped air suction cover, the inner annular portion extends downward to be flush with the bottom surface of the base, the bottom surface of the inner annular portion is communicated with a first connecting pipe, the first connecting pipe is communicated with a first air suction pump, the first air suction pump is connected with a waste gas treatment tank, the waste gas treatment tank is arranged below the base, and a plurality of supporting legs are fixed on the bottom surface of the base.

[0011] Preferably, the waste gas treatment tank is connected with a blade preheating tank through a second connecting pipe, the top of the blade preheating tank is provided with a plurality of blade preheating grooves, the blade preheating tank is connected with a cover plate preheating tank through a third connecting pipe, the cover plate preheating tank is provided with a plurality of cover plate preheating grooves, and an exhaust pipe is arranged on the cover plate preheating tank, and an automatic exhaust valve is arranged on the exhaust pipe.

[0012] Preferably, the bottom surface of the inner annular portion is communicated with a fourth connecting pipe, the fourth connecting pipe is communicated with a second air suction pump, and an air outlet pipe is arranged on the second air suction pump.

[0013] Preferably, the first heat preservation layer and the second heat preservation layer are both provided with cavities.

[0014] Preferably, the first heat preservation layer comprises a first arc-shaped heat preservation plate and a second arc-shaped heat preservation plate, a first W-shaped plate is fixed at the top end of the first arc-shaped heat preservation plate, a top plate is fixed at the right side of the first W-shaped plate, a second W-shaped plate is fixed at the right end of the top plate, the second arc-shaped heat preservation plate is fixed at the right side of the second W-shaped plate, a wave-shaped bottom plate is fixed between the bottom ends of the first arc-shaped heat preservation plate and the second arc-shaped heat preservation plate, a cavity is formed between the first arc-shaped heat preservation plate, the first W-shaped plate, the top plate, the second W-shaped plate, the second arc-shaped heat preservation plate and the bottom plate, a plurality of X-shaped telescopic supports are arranged in the cavity, the two top ends of the X-shaped telescopic supports are fixed on the bottom surface of the top plate, the two bottom ends of the X-shaped telescopic supports are fixed on the bottom plate, springs are arranged above the bottom plate, and the two ends of each spring are fixed on the X-shaped telescopic supports.

[0015] Preferably, the impeller welding method comprises the following specific steps: S1: taking the blades from the blade preheating box and placing them into the blade locking grooves until all the blade locking grooves are provided with blades; S2: rotating the mechanism to start, rotating the turntable, and synchronously reducing all the blade locking grooves until the blades are locked; S3: taking the cover plate from the cover plate preheating box and sleeving it on the positioning column; S4: starting the electrode to move downward until the cover plate is compressed to heat and weld the cover plate and the blades, and at the same time, the first air pump is started to make the high-temperature waste gas generated in the welding process enter the annular air suction cover through the air suction holes on the annular air suction cover, then enter the inner annular part through the hollow partition block, then enter the waste gas treatment box through the first connecting pipe and the first air pump, and then enter the blade preheating box and the cover plate preheating box, and when the air pressure in the automatic exhaust valve reaches the pre-set threshold value, the automatic exhaust valve is opened to exhaust; S5: when the welding is completed, the electrode is closed and rises to be flush with the top surface of the annular air suction cover, the rotating mechanism is reversely started to open the blade locking grooves, the first air pump continues to perform air extraction, the air extraction time is 5-8s, then the first air pump stops running, at the same time, the electrode rises to the original position, the second air pump is started to suck natural air through the annular air suction cover, then the natural air enters the inner annular part through the hollow partition block, then the natural air is finally discharged from the air outlet pipe through the fourth connecting pipe and the second air pump to cool the blades and the cover plate; and S6: after the cooling is completed, the blades and the cover plate welded together are taken out, and then the next round of welding is performed.

[0016] (Three) beneficial effects

[0017] 1. The present application is through the setting of the rotating disc and the blade locking groove, so that the blade locking groove can realize automatic scaling, can adapt to different thickness of blade, wide adaptability, also facilitate the placement of the blade, in the process of placing will not cause damage to the blade, in addition, when the blade locking groove needs to be cleaned, only need to rotate the rotating mechanism to rotate the rotating disc to the maximum, which greatly facilitates the cleaning of the blade locking groove.

[0018] 2. The present application is through the setting of the first heat preservation layer and the second heat preservation layer, on the one hand, it can adapt to the environment of high temperature welding, on the other hand, it can clamp the blade of different thickness, and the flexible material of the first heat preservation layer and the second heat preservation layer can protect the blade during clamping, in addition, the first heat preservation layer and the second heat preservation layer can well heat preservation and heat insulation effect on the blade part in the blade locking groove, which can prevent the heat loss of the preheated blade before welding, and prevent the heat of the blade part in the blade locking groove from being conducted and dissipated through the limiting block and the rotating disc during welding, so as to ensure the balance of the blade, cover plate and temperature, thereby reducing the stress caused by temperature difference in the welding process, and greatly improving the welding quality.

[0019] 3. The present application is through the setting of the annular air suction cover, which can well limit the high temperature waste gas generated in the welding process, and can timely absorb and remove the high temperature waste gas in the annular air suction cover, avoiding the high temperature waste gas from escaping to the air and polluting the air; the existing shape characteristics of the rotating disc are combined with the annular air suction cover, the waste gas generated in the welding process is sucked into the inner annular part of the rotating disc through the hollow partition block, so that the high temperature waste gas is inhaled in a centripetal manner, that is, in a vortex manner, greatly improving the efficiency and effect of waste gas suction.

[0020] 4. The present application is through the setting of the blade preheating box and the cover plate preheating box, which makes good use of the heat of the high temperature waste gas generated in the welding process, preheats the blade and cover plate before welding, turns waste into treasure, saves resources, reduces the stress caused by temperature difference in the welding process, and greatly improves the welding quality.

[0021] 5. The present application is through the setting of the second air pump, which can not only play a good cooling effect on the blade and cover plate after welding, but also does not affect the preheating effect on the blade and cover plate.

[0022] 6. The application is provided with a cavity, a first W-shaped plate, a second W-shaped plate, an X-shaped telescopic frame and the like, so that the first heat preservation layer has greater elasticity, can adapt to more sizes of blades, and greatly improves the adaptability; when the blade needs to be locked, the first heat preservation layer is compressed, thereby causing the X-shaped telescopic frame to be compressed, and the top end of the X-shaped telescopic frame to rise upward, thereby driving the top plate to rise, and due to the arrangement of the first W-shaped plate and the second W-shaped plate, sufficient allowance is provided for the rising of the top plate, so that the overall height of the first heat preservation layer rises, so that when the blade after preheating is clamped, the blade can be better heat preserved, and when the welding is completed, the first heat preservation layer releases the clamping of the blade, and due to the arrangement of the spring, the X-shaped telescopic frame returns to the original position, so that the height of the first heat preservation layer is reduced, not only improving the heat dissipation effect of the blade, but also the increase of the cavity can slow down the cooling speed of the first heat preservation layer, thereby enhancing the preheating effect of the blade in the next round of welding. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the overall schematic diagram of the application.

[0024] Figure 2 It is the application Figure 1 The schematic diagram after placing the blade and the cover plate.

[0025] Figure 3 It is the application Figure 2 The schematic diagram after removing the cover plate.

[0026] Figure 4 It is the disassembled schematic diagram of the base, the limiting block and the turntable of the application.

[0027] Figure 5 It is the schematic diagram of the base, the turntable and the rotating mechanism of the application.

[0028] Figure 6 It is the top view of the turntable and the limiting block of the application.

[0029] Figure 7 It is the application Figure 6 The schematic diagram after adding the first heat preservation layer and the second heat preservation layer.

[0030] Figure 8 It is the schematic diagram of the turntable and the annular air suction cover of the application.

[0031] Figure 9 It is the schematic diagram of the application after adding the waste gas treatment box, the supporting leg, the second connecting pipe, the blade preheating box, the third connecting pipe, the cover plate preheating box, the exhaust pipe, the automatic exhaust valve, the fourth connecting pipe, the second air suction pump and the air outlet pipe.

[0032] Figure 10 It is the sectional view of the first heat preservation layer or the second heat preservation layer of the application.

[0033] In the figure: 1-base, 2-circular embedded groove, 3-first limiting groove, 4-limiting block, 5-rotating disc, 6-second limiting groove, 7-vane locking groove, 8-rotating mechanism, 9-electrode, 10-cylinder, 11-telescopic connecting rod, 12-tooth, 13-tooth groove, 14-first arc surface, 15-first limiting surface, 16-second arc surface, 17-second limiting surface, 18-first heat preservation layer, 19-second heat preservation layer, 20-outer annular part, 21-stop block, 22-inner annular part, 23-positioning column, 24-annular air suction cover, 25-air suction hole, 26-first connecting pipe, 27-first air suction pump, 28-waste gas treatment box, 29-supporting leg, 30-second connecting pipe, 31-vane preheating box, 32-third connecting pipe, 33-cover plate preheating box, 34-exhaust pipe, 35-automatic exhaust valve, 36-fourth connecting pipe, 37-second air suction pump, 38-outlet pipe, 39-cavity, 40-first arc heat preservation plate, 41-second arc heat preservation plate, 42-first W-shaped plate, 43-top plate, 44-second W-shaped plate, 45-bottom plate, 46-X-shaped telescopic support, 47-spring. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings. Figures 1-10 The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0035] The application provides a technical scheme: a impeller welding equipment, including base 1, the center position of base 1 is provided with circular embedding slot 2, the part of base 1 in embedding slot 2 is uniformly provided with a plurality of first limit slot 3, the first limit slot 3 is fixed with limit block 4, the top of limit block 4 exceeds the bottom surface of embedding slot 2, the part of limit block 4 exceeding embedding slot 2 is sleeved with rotating disc 5, the second limit slot 6 is set on rotating disc 5, the second limit slot 6 is provided with blade locking slot 7 between limit block 4, rotating mechanism 8 is arranged on rotating disc 5, and electrode 9 is arranged above rotating disc 5.The inner diameter of circular embedding slot 2 is equal to the outer diameter of rotating disc 5, and the circular embedding slot 2 is relatively shallow, so that the rotating disc 5 can be well limited, and the rotation of rotating disc 5 is not affected.The size of second limit slot 6 is greater than the size of limit block 4, so that there is space for rotating disc 5 to rotate between limit block 4 and second limit slot 6.When working, first, rotating mechanism 8 rotates rotating disc 5, so that blade locking slot 7 is opened, then the blade is placed in each blade locking slot 7 in turn, then rotating mechanism 8 is restarted to lock all blades at the same time, then the cover plate is placed above the blade, then electrode 9 is started to weld the cover plate and the blade, wherein the lifting mechanism is arranged on electrode 9, which can automatically lift the motor 9, when welding is needed, the lifting mechanism drives electrode 9 downward until the cover plate is pressed, then electrode 9 heats and welds the cover plate and the impeller, when the welding is completed, the lifting mechanism drives electrode 9 to rise to the original position, then rotating mechanism 8 reversely rotates rotating disc 5 to open blade locking slot 7, then the cover plate and the blade welded together can be taken out.The lifting mechanism is prior art, and will not be described here.The setting of rotating disc 5 and blade locking slot 7 can realize automatic zooming of blade locking slot 7, can adapt to blades of different thicknesses, has wide adaptability, is convenient for placing blades, does not cause damage to blades during placement, and when blade locking slot 7 needs to be cleaned, rotating mechanism 8 is only needed to rotate rotating disc 5 to the maximum, so that the cleaning of blade locking slot 8 is greatly facilitated.

[0036] The rotating mechanism 8 comprises two air cylinders 10 arranged symmetrically on both sides of the rotating disc 5, the air cylinders 10 are fixed on the base 1, the piston rod ends of the air cylinders 10 are fixed with telescopic connecting rods 11, the telescopic connecting rods 11 are in sliding connection with the base 1, and the telescopic connecting rods 11 are provided with a plurality of teeth 12 on the surface facing the rotating disc 5, and the rotating disc 5 is provided with tooth grooves 13 matched with the teeth 12 at the positions opposite to the teeth 12. This is the specific structure of the rotating mechanism 8, when it is needed to place the blade into the blade locking groove 8, the two air cylinders 10 are started at the same time, the piston rod of the left air cylinder 10 is retracted, the left telescopic connecting rod 11 is retracted, the piston rod of the right air cylinder 10 is extended, the right telescopic connecting rod 11 is extended, and then the rotating disc 5 is counterclockwise rotated, so that the blade locking groove 8 is opened to the maximum, then the blade is placed into the blade locking groove 8, after the blade is placed, the two air cylinders 10 are only needed to be started reversely, so that the rotating disc 5 is clockwise rotated, and the blade is locked.

[0037] The blade locking groove 7 comprises a first arc surface 14, the inner end of the first arc surface 14 is connected with a first limiting surface 15, the first limiting surface 15 and the first arc surface 14 are arranged on the limiting block 4, the first limiting surface 15 is connected with a second arc surface 16, the outer end of the second arc surface 16 is connected with a second limiting surface 17, and the second arc surface 16 and the second limiting surface 17 are arranged on the second limiting groove 6. The first arc surface 14 and the second arc surface 16 are matched with the two arc surfaces of the blade respectively, and the first limiting surface 15 and the second limiting surface 17 limit the two side end surfaces of the blade.

[0038] The first arc surface 14 is fixed with a first heat preservation layer 18, and the second arc surface 16 is fixed with a second heat preservation layer 19. The materials of the first heat preservation layer 18 and the second heat preservation layer 19 are elastic heat preservation materials, and the graphite soft felt is the best choice among all the elastic heat preservation materials, because the graphite soft felt has good heat preservation and insulation effect, is resistant to high temperature, is suitable for use in the welding environment, and has good compression rate and recovery rate. The thicknesses of the first heat preservation layer 18 and the second heat preservation layer 19 are set according to actual needs. Through the settings of the first heat preservation layer 18 and the second heat preservation layer 19 made of the graphite soft felt, on one hand, the high-temperature welding environment can be adapted, and on the other hand, blades with different thicknesses can be clamped, and at the same time, the first heat preservation layer 18 and the second heat preservation layer 19 with flexible materials can protect the blades well during clamping of the blades. In addition, the first heat preservation layer 18 and the second heat preservation layer 19 have good heat preservation and insulation effect on the part of the blade in the blade locking groove 7, wherein the heat loss of the blade after preheating can be prevented before welding, and the heat of the part of the blade in the blade locking groove 7 is prevented from being conducted and lost through the limiting block 4 and the rotating disc 5, etc. during welding, so as to ensure the uniformity of the blade, the cover plate and the temperature, thereby reducing the stress caused by the temperature difference during welding, and greatly improving the welding quality.

[0039] The rotating disc 5 is hollow, comprising an outer annular portion 20, the inner end of which is connected to a plurality of partition blocks 21, the inner end of the partition blocks 21 is connected to an inner annular portion 22, the middle position of the inner annular portion 22 is fixed with a positioning column 23, the top surface of the outer annular portion 20 is provided with an annular air suction cover 24, the annular air suction cover 24 is hollow, the bottom of which is connected to the outer annular portion 20, a plurality of air suction holes 25 are arranged on the inner wall surface of the annular air suction cover 24, the inner annular portion 22 extends downward to the bottom surface of the base 1, and the bottom surface of the inner annular portion 22 is connected to a first connecting pipe 26, the first connecting pipe 26 is connected to a first air suction pump 27, the first air suction pump 27 is connected to a waste gas treatment box 28, the waste gas treatment box 28 is arranged below the base 1, and a plurality of supporting legs 29 are fixed on the bottom surface of the base 1. The positioning column 23 is used for sleeving the cover plate and positioning the cover plate. In specific work, the first air suction pump 27 is started at the moment when the electrode 9 contacts the cover plate, so that the high-temperature waste gas generated in the welding process first enters the annular air suction cover 24 through the air suction holes 25 on the annular air suction cover 24, and then is sucked into the inner annular portion 22 through the hollow partition blocks 21, and then is discharged after being treated in the waste gas treatment box 28 through the first connecting pipe 26 and the first air suction pump 27. The top of the annular air suction cover 24 is higher than the bottom surface of the electrode 9 in the welding state, so that the contact part of the electrode 9, that is, the position where the high-temperature waste gas is generated, can be located inside the annular air suction cover 24, which can well limit the high-temperature waste gas generated in the welding process, confine the high-temperature waste gas in the annular air suction cover 24 and timely suck it away, avoid the high-temperature waste gas from escaping to the air and polluting the air, and the annular air suction cover 24 does not need to be arranged to be much higher than the top surface of the cover plate, so that the annular air suction cover 24 will not be inconvenient to operate due to being too high. The existing shape characteristics of the rotating disc 5 are combined with the annular air suction cover 24, the waste gas generated in the welding process is sucked into the inner annular portion 22 at the center position of the rotating disc 5 through the hollow partition blocks 21, so that the high-temperature waste gas is sucked in a centripetal manner, that is, in a vortex manner, which greatly improves the efficiency and effect of sucking the waste gas. If the annular air suction cover 24 does not adopt the vortex suction mode, there will be great interference between the relatively arranged air suction holes 25 on the annular air suction cover 24 in the process of sucking the waste gas, which greatly affects the effect of sucking the waste gas. If the ordinary waste gas suction mode in the prior art is adopted, that is, an air suction cover is arranged above the welding equipment to suck the waste gas, this waste gas suction mode often occupies a large space above the welding equipment, and is also easy to cause the waste gas to escape to the surrounding air and pollute the environment in the process of sucking the waste gas, and in addition, this waste gas suction mode is easy to cause heat loss.

[0040] The waste gas treatment box 28 is connected with the blade preheating box 31 through the second connecting pipe 30, the top of the blade preheating box 31 is provided with a plurality of blade preheating grooves, the blade preheating box 31 is connected with the cover plate preheating box 33 through the third connecting pipe 32, the cover plate preheating box 33 is provided with a plurality of cover plate preheating grooves, and the cover plate preheating box 33 is provided with the exhaust pipe 34, and the automatic exhaust valve 35 is arranged on the exhaust pipe 34. If the blade and the cover plate are not preheated before welding, the stress generated during the welding process will be easily increased due to the temperature difference, thereby affecting the welding quality. The temperature of the waste gas generated during the welding process is very high, and it contains a lot of heat. If the heat is collected and used to preheat the blade and the cover plate, the blade and the cover plate can be preheated, and the waste can be used as treasure, and resources can be saved. Therefore, the preheating of the blade and the cover plate is realized through the setting. The blade preheating groove is used for placing the blade, the shape of the blade preheating groove is consistent with the top surface and the bottom surface of the blade, and the depth of the blade preheating groove is less than the height of the blade. In this way, the blade can be conveniently taken and placed, and the blade can also be preheated well. The cover plate preheating groove is used for placing the cover plate, and the cover plate preheating groove is semicircular and is inserted into half of the cover plate. The cover plate is preheated to the maximum extent under the premise of being convenient to take and place. In order to increase the heat preservation effect of the waste gas in the waste gas treatment box 28, the blade preheating box 32 and the cover plate preheating box 33, a heat preservation layer can be added to the inner wall of the waste gas treatment box 28, and a heat preservation layer can be added to the inner wall of the bottom plate and the four side plates of the blade preheating box 32 and the cover plate preheating box 33. The automatic exhaust valve 35 is arranged. When the air pressure in the cover plate preheating box 33 reaches the pre-set threshold value, the automatic exhaust valve 35 will be opened to exhaust. In this way, the exhaust is not affected, and the heat preservation effect of the blade preheating box 31 and the cover plate preheating box 33 is greatly improved, thereby improving the preheating effect of the blade and the cover plate. Through the setting, the waste heat in the high-temperature waste gas is well collected and utilized. The blade and the cover plate are well preheated before welding by using the waste heat of the high-temperature waste gas generated during the welding process. In this way, the stress generated due to the temperature difference during the welding process is reduced, and the welding quality is greatly improved. Since the temperature of the blade and the cover plate on the blade preheating box 31 and the cover plate preheating box 33 is relatively high, the blade and the cover plate can be automatically sent to their respective positions by a mechanical arm in an automatic clamping or adsorption manner. The blade is sent to the blade locking groove 7, and the cover plate is sent to the positioning column 23. Through the ring-shaped air suction cover 24 and other structures, the collection efficiency and effect of the waste gas heat during welding are greatly improved. The high-temperature waste gas is discharged through the rotating disc 5. In this way, the high-temperature waste gas also plays a role in warming the rotating disc after passing through the rotating disc 5. The rotating disc 5 also plays a good heat preservation role on the blade and the cover plate during welding, ensures the uniformity of the temperature, prevents the generation of stress, and further improves the welding quality.

[0041] The bottom surface of the inner annular part 22 is communicated with a fourth connecting pipe 36, the fourth connecting pipe 36 is communicated with a second air pump 37, and the second air pump 37 is provided with an air outlet pipe 38. In the welding process, the first air pump 27 is started, and the second air pump 37 is stopped. When the welding is finished and no high-temperature waste gas is generated, the first air pump 27 is stopped, and the second air pump 37 is started to perform the air pumping process. The air pumping process performed by the second air pump 37 mainly plays a cooling role and has a good air cooling effect. Air is sucked into the annular air suction cover 24, then enters the inner annular part 22 through the hollow partition block 21, then passes through the fourth connecting pipe 36 and the second air pump 37, and finally is discharged from the air outlet pipe 38. Due to the arrangement of the annular air suction cover 24, if the natural cooling method is used after welding, the cooling efficiency is very low. Therefore, the arrangement not only has a good cooling effect, but also does not affect the preheating effect of the blade and the cover plate. The air pumping rate of the second air pump 37 can be set to be relatively small, so that stress is not generated due to too fast cooling speed. After the welding is finished, the first air pump 27 does not stop immediately, but continues to pump for a period of time, which is determined according to the actual situation. Because the temperature is relatively high after the welding is finished, and there is residual waste gas, the first air pump 27 does not stop immediately, but continues to pump for a certain period of time, and then stops. Then, the second air pump 37 is started to perform the air pumping and cooling process.

[0042] The first heat preservation layer 18 and the second heat preservation layer 19 are both provided with cavities 39. The cavities 39 are arranged between the first heat preservation layer 18 and the second heat preservation layer 19, so that the cooling speed of the first heat preservation layer 18 and the second heat preservation layer 19 can be slowed down after the welding is finished, thereby enhancing the preheating effect of the blade in the next round of welding.

[0043] The first heat preservation layer 18 comprises a first arc-shaped heat preservation plate 40 and a second arc-shaped heat preservation plate 41, the top end of the first arc-shaped heat preservation plate 40 is fixed with a first W-shaped plate 42, the right side of the first W-shaped plate 42 is fixed with a top plate 43, the right end of the top plate 43 is fixed with a second W-shaped plate 44, the right side of the second W-shaped plate 44 is fixed with the second arc-shaped heat preservation plate 41, the bottom ends of the first arc-shaped heat preservation plate 40 and the second arc-shaped heat preservation plate 41 are fixed with a wave-shaped bottom plate 45, the first arc-shaped heat preservation plate 40, the first W-shaped plate 42, the top plate 43, the second W-shaped plate 44, the second arc-shaped heat preservation plate 41 and the bottom plate 45 form a cavity 39, a plurality of X-shaped telescopic supports 46 are arranged in the cavity 39, the two top ends of the X-shaped telescopic supports 46 are fixed on the bottom surface of the top plate 43, the two bottom ends of the X-shaped telescopic supports 46 are fixed on the bottom plate 45, a spring 47 is arranged above the bottom plate 45, and the two ends of the spring 47 are fixed on the X-shaped telescopic supports 46. The second heat preservation layer 19 and the first heat preservation layer 18 are also arranged in this structure. Through the arrangement, the first heat preservation layer 18 has greater elasticity, can adapt to more sizes of vanes, and greatly improves the adaptability. When the vane needs to be locked, the first heat preservation layer 18 is compressed, so that the X-shaped telescopic supports 46 are compressed, the top end of the X-shaped telescopic supports 46 is lifted upwards, the top plate 43 is lifted, and the first W-shaped plate 42 and the second W-shaped plate 44 provide sufficient space for the lifting of the top plate 43, so that the overall height of the first heat preservation layer 18 is increased, so that the first heat preservation layer 18 can better heat preservation when clamping the preheated vane, and when the welding is completed, the first heat preservation layer 18 releases the clamping of the vane, and due to the arrangement of the spring 47, the X-shaped telescopic supports 46 return to the original position, so that the height of the first heat preservation layer 18 is reduced, not only improving the heat dissipation effect of the vane, but also increasing the size of the cavity 39, so as to slow down the cooling speed of the first heat preservation layer 18, thereby enhancing the preheating effect of the vane in the next round of welding. The bottom plate 45 is arranged in a wave shape, so that the bottom plate 45 can stretch and contract with the spring 47, so as to ensure the normal stretching and contraction of the X-shaped telescopic supports.

[0044] A method for welding an impeller includes the following steps: S1: Remove the blades from the blade preheating box 31 and place them into the blade locking slots 7 until all blade locking slots 7 are filled with blades; S2: Start the rotating mechanism 8 and rotate the turntable 5 to synchronously reduce the size of all blade locking slots 7 until the blades are locked; S3: Remove the cover plate from the cover plate preheating box 33 and attach it to the positioning post 23; S4: Start the electrode 9 and press it down to heat and weld the cover plate and blades. Simultaneously with the start of the electrode 9, start the first suction pump 27. The high-temperature exhaust gas generated during welding enters the annular suction hood 24 through the suction holes 25 on the annular suction hood 24, then is drawn into the inner annular part 22 through the hollow partition block 21, and then enters the exhaust gas treatment box 28 through the first connecting pipe 26 and the first suction pump 27 for treatment before entering the blade preheating box 31. Afterwards, it enters the preheating box 33 of the cover plate. When the air pressure in the automatic exhaust valve 35 reaches the preset threshold, the automatic exhaust valve 35 will open to exhaust air; S5: After welding is completed, the electrode 9 closes and rises to be flush with the top surface of the annular suction hood 24. The rotating mechanism 8 starts in reverse to open the blade locking groove 7. The first suction pump 27 continues to pump air for 5~8 seconds. Then the first suction pump 27 stops running. At the same time, the electrode 9 rises to its original position, and the second suction pump 37 starts. Natural air is drawn in through the annular suction hood 24, then enters the inner annular part 22 through the hollow partition block 21, and finally exits through the fourth connecting pipe 36 and the second suction pump 37, cooling the blade and cover plate; S6: After cooling is completed, the welded blade and cover plate can be taken out, and then the next round of welding can be carried out.

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

Claims

1. An impeller welding apparatus characterized by comprising: The utility model provides a base (1), the centre position of base (1) is equipped with circular embedded slot (2), the part of base (1) in embedded slot (2) is uniformly equipped with a plurality of first limit slot (3), the first limit slot (3) is fixed with limit block (4), the top of limit block (4) is beyond the bottom surface of embedded slot (2), the part of limit block (4) beyond embedded slot (2) bottom surface is sleeved with rotating disc (5), the second limit slot (6) that rotating disc (5) is equipped with is crossed, second limit slot (6) and limit block (4) between be equipped with vane lock groove (7), rotating disc (5) is equipped with rotating mechanism (8), and the top of rotating disc (5) is equipped with electrode (9); The vane lock groove (7) includes a first arc surface (14), a first limit surface (15) is connected to the inner end of the first arc surface (14), the first limit surface (15) and the first arc surface (14) are both arranged on the limit block (4), the first limit surface (15) is connected to a second arc surface (16), the outer end of the second arc surface (16) is connected to a second limit surface (17), the second arc surface (16) and the second limit surface (17) are both arranged on the second limit slot (6); The first arc surface (14) is fixed with a first thermal insulation layer (18), and the second arc surface (16) is fixed with a second thermal insulation layer (19); The first thermal insulation layer (18) and the second thermal insulation layer (19) both have a cavity (39) inside; The first thermal insulation layer (18) includes a first arc-shaped thermal insulation plate (40) and a second arc-shaped thermal insulation plate (41), the top end of the first arc-shaped thermal insulation plate (40) is fixed with a first W-shaped plate (42), the right side of the first W-shaped plate (42) is fixed with a top plate (43), the right end of the top plate (43) is fixed with a second W-shaped plate (44), the right side of the second W-shaped plate (44) is fixed with the second arc-shaped thermal insulation plate (41), the bottom ends of the first arc-shaped thermal insulation plate (40) and the second arc-shaped thermal insulation plate (41) are fixed with a wave-shaped bottom plate (45), the first arc-shaped thermal insulation plate (40), the first W-shaped plate (42), the top plate (43), the second W-shaped plate (44), the second arc-shaped thermal insulation plate (41), and the bottom plate (45) form the cavity (39), a plurality of X-shaped telescopic supports (46) are arranged in the cavity (39), the two top ends of the X-shaped telescopic supports (46) are fixed to the bottom surface of the top plate (43), the two bottom ends of the X-shaped telescopic supports (46) are fixed to the bottom plate (45), a spring (47) is arranged above the bottom plate (45), and the two ends of the spring (47) are both fixed to the X-shaped telescopic supports (46).

2. An impeller welding apparatus according to claim 1, wherein The rotating mechanism (8) comprises two air cylinders (10) arranged symmetrically on both sides of the rotating disc (5) and fixed on the base (1), the piston rod end of the air cylinder (10) is fixed with a telescopic connecting rod (11), the telescopic connecting rod (11) is slidably connected with the base (1), and the telescopic connecting rod (11) is provided with a plurality of teeth (12) on the surface facing the rotating disc (5), and the rotating disc (5) is provided with a tooth groove (13) matched with the teeth (12) at a position opposite to the teeth (12).

3. The impeller welding apparatus of claim 1, wherein The rotating disc (5) is hollow and comprises an outer annular portion (20) which is communicated with a plurality of partition blocks (21), the inner end of the partition block (21) is communicated with an inner annular portion (22), the middle position of the inner annular portion (22) is fixed with a positioning column (23), the top surface of the outer annular portion (20) is provided with a ring-shaped air suction cover (24), the ring-shaped air suction cover (24) is hollow and is communicated with the outer annular portion (20) at the bottom, a plurality of air suction holes (25) are arranged on the inner wall surface of the ring-shaped air suction cover (24), the inner annular portion (22) extends downward to be flush with the bottom surface of the base (1), and the bottom surface of the inner annular portion (22) is communicated with a first connecting pipe (26), the first connecting pipe (26) is communicated with a first air suction pump (27), the first air suction pump (27) is connected with a waste gas treatment box (28), the waste gas treatment box (28) is arranged below the base (1), and a plurality of supporting legs (29) are fixed on the bottom surface of the base (1).

4. An impeller welding apparatus according to claim 3, wherein The waste gas treatment box (28) is connected with a blade preheating box (31) through a second connecting pipe (30), the top of the blade preheating box (31) is provided with a plurality of blade preheating grooves, the blade preheating box (31) is connected with a cover plate preheating box (33) through a third connecting pipe (32), the cover plate preheating box (33) is provided with a plurality of cover plate preheating grooves, and the cover plate preheating box (33) is provided with an exhaust pipe (34), and the exhaust pipe (34) is provided with an automatic exhaust valve (35).

5. An impeller welding apparatus according to claim 3, wherein The bottom surface of the inner annular portion (22) is communicated with a fourth connecting pipe (36), the fourth connecting pipe (36) is communicated with a second air suction pump (37), and the second air suction pump (37) is provided with an air outlet pipe (38).

6. A method of welding an impeller, characterized by It relates to the impeller welding equipment described in any one of claims 1-5, and the specific steps are as follows: S1: the blade is taken out from the blade preheating box (31) and placed in the blade locking groove (7) until all the blade locking grooves (7) are placed with blades; S2: the rotating mechanism (8) is started, the rotating disc (5) is rotated, and all the blade locking grooves (7) are synchronously reduced until the blade is locked; S3: the cover plate is taken out from the cover plate preheating box (33) and sleeved on the positioning column (23); S4: the electrode (9) starts to work and goes down to heat and weld the cover plate and the blade, at the same time, the first air pump (27) starts to work, the high-temperature waste gas generated during the welding process enters the annular air suction cover (24) through the air suction hole (25) on the annular air suction cover (24), then enters the inner annular part (22) through the hollow partition block (21), then enters the waste gas treatment box (28) through the first connecting pipe (26) and the first air pump (27), and then enters the blade preheating box (31), then enters the cover plate preheating box (33), when the air pressure in the automatic exhaust valve (35) reaches the pre-set threshold value, the automatic exhaust valve (35) will open to exhaust; S5: when the welding is completed, the electrode (9) is closed and rises to the top surface of the annular air suction cover (24), the rotating mechanism (8) is reversely started to open the blade locking groove (7), the first air pump (27) continues to pump, the pumping time is 5-8s, then the first air pump (27) stops working, at the same time, the electrode (9) rises to the original position, the second air pump (37) starts to work, the natural air is sucked into the annular air suction cover (24), then enters the inner annular part (22) through the hollow partition block (21), then enters the waste gas treatment box (28) through the fourth connecting pipe (36) and the second air pump (37), and finally is discharged from the air outlet pipe (38) to cool the blade and the cover plate; S6: after cooling, the blade and the cover plate welded together can be taken out, then the next round of welding is carried out.

Images