A welding fixture for evaporator shells

Abstract

This invention discloses a welding fixture for evaporator shells, belonging to the technical field of welding auxiliary equipment. It includes a moving component, which comprises a base. Two mounting blocks are fixedly connected to the upper side wall of the base, and a sliding groove is fixedly connected between the two mounting blocks. A lead screw is rotatably connected between the two mounting blocks. Two sliding blocks are slidably connected inside the sliding groove. A first motor is fixedly connected to the side wall of one of the mounting blocks, and the output end of the first motor is fixedly connected to the lead screw. A clamping component is fixedly connected to the upper end of each of the two sliding blocks, and a rotating component is fixedly connected inside the clamping component. This device can clamp the evaporator shell while simultaneously rotating it. In conjunction with a conversion component and a telescopic adjustment component, it can mechanically grind the welding ends of evaporator shells of different diameters. Simultaneously, the telescopic adjustment component can increase the grinding area with the shell, significantly improving the cleaning effect, effectively removing the oxide layer from the welding ends, and improving the welding quality.

Description

Technical Field

[0001] This invention relates to the field of welding auxiliary equipment technology, specifically a welding fixture for evaporator shells. Background Technology

[0002] The evaporator shell is a crucial pressure-bearing structural component in refrigeration, chemical, and heat exchange systems, and its design must balance strength, sealing, and heat transfer efficiency. It is typically made of stainless steel, carbon steel, or composite materials, forming a sealed cavity through welding, flange connections, or other methods, housing the evaporator tube bundle or heat exchange plates. The shell must withstand the alternating action of high-temperature, high-pressure steam and low-temperature media; therefore, its wall thickness, ellipticity, and corrosion resistance must strictly comply with industry standards (such as ASME or GB150). Optimized shell design can improve heat exchange efficiency; for example, using bellows or spiral flow guide structures to reduce fluid resistance, while equipping it with manholes, safety valve interfaces, and level gauges ensures long-term stable operation of the equipment.

[0003] Chinese patent discloses a pipe welding device (authorization announcement number CN105171292B), which includes: a housing, a gear ring, a gear mechanism, a drive mechanism, and a control mechanism; the housing is provided with a through hole to accommodate the workpiece to be welded, and an opening is provided on one radial side of the through hole; the gear ring is provided with a notch on one radial side corresponding to the opening; the pipe welding device is also provided with a return detection mechanism to detect whether the opening and the notch coincide, the return detection mechanism is electrically connected to the control mechanism, and sends a signal to the control mechanism when the opening and the notch do not coincide, and then the control mechanism controls the drive mechanism to drive the gear mechanism to rotate, thereby driving the gear ring to rotate to the point where the opening and the notch coincide.

[0004] For the welding process of the tubular shell of a shell-and-tube evaporator, the welding area at one end of the shell needs to be pre-treated before welding to remove oxide layer and impurities, thereby improving the strength of the weld joint. However, existing welding fixtures and the aforementioned patents lack automated pre-treatment functions and still rely on manual operation to complete this step. In addition, after welding, welding slag will remain in the welding area. Currently, the welding slag is usually removed by manual knocking, which is inefficient and labor-intensive. To solve the above problems, we propose a welding fixture for evaporator shells. Summary of the Invention

[0005] The purpose of this invention is to provide a welding fixture for evaporator shells to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A welding fixture for an evaporator shell includes a movable component. The movable component includes a base, two mounting blocks are fixedly connected to the upper side wall of the base, a slide groove is fixedly connected between the two mounting blocks, a lead screw is rotatably connected between the two mounting blocks, two sliding blocks are slidably connected inside the slide groove, a first motor is fixedly connected to the side wall of one of the mounting blocks, and the output end of the first motor is fixedly connected to the lead screw, a clamping component is fixedly connected to the upper end of each of the two sliding blocks, a rotating component is fixedly connected inside the clamping component, a conversion component is fixedly connected to each of the two sliding blocks, and a telescopic adjustment component is fixedly connected to the conversion component.

[0008] The conversion assembly includes two connecting boxes fixedly connected to the opposite side walls of two sliding blocks, a rotating cylinder rotatably connected between the two connecting boxes, a transmission gear rotatably connected inside the two connecting boxes and fixedly connected to the rotating cylinder, two transmission racks inserted into the sliding blocks and meshing with the transmission gears, a connecting plate fixedly connected between the two transmission racks, a return spring fixedly connected between the connecting plate and the sliding blocks, a stop post fixedly connected to the connecting plate, a fixed post fixedly connected to the rotating cylinder, and a switch button fixedly connected to the fixed post.

[0009] The telescopic adjustment assembly includes a support L-shaped plate fixedly connected to the rotating cylinder, two hydraulic cylinders fixedly connected to the support L-shaped plate, a movable plug slidably connected inside each of the two hydraulic cylinders, a push-pull rod fixedly connected to the opposite side wall of each of the two hydraulic cylinders, a grinding component slidably connected to the lower end of the push-pull rod, a pressure cylinder fixedly connected to the side wall of the support L-shaped plate, an electromagnet fixedly connected to the end of the pressure cylinder away from the support L-shaped plate, a magnetic plug slidably connected inside the pressure cylinder, a connecting spring fixedly connected between the magnetic plug and the pressure cylinder, and a connecting pipe connecting the pressure cylinder and the hydraulic cylinder.

[0010] As a further embodiment of the present invention, the grinding assembly includes a movable cylinder slidably connected to the lower end of the push-pull rod, a pressure plug slidably connected inside the movable cylinder, and the pressure plug is fixedly connected to the lower end of the push-pull rod. A support spring is fixedly connected between the pressure plug and the inner wall of the movable cylinder.

[0011] As a further embodiment of the present invention, the lower end of the movable cylinder is connected to a connecting box, the lower end of the connecting box is connected to multiple connecting pipes, each of the multiple connecting pipes is slidably connected to a moving plug, and a grinding cylinder is fixedly connected to the lower side wall of the moving plug.

[0012] As a further embodiment of the present invention, the clamping assembly includes a clamping ring shell, and multiple corresponding rotating boxes are rotatably connected to the inner walls of the left and right sides of the clamping ring shell, and a clamping cylinder is rotatably connected between each pair of corresponding rotating boxes.

[0013] As a further embodiment of the present invention, each pair of corresponding rotating boxes is fixedly connected to a first connecting rod, and multiple second connecting rods are fixedly connected inside the clamping ring shell. A hydraulic cylinder is rotatably connected between the first connecting rod and the second connecting rod. Multiple hydraulic cylinders are connected in series through oil pipes to form a series flow path. An oil cylinder is fixedly connected to the clamping ring shell. The oil cylinder is connected to two hydraulic cylinders at both ends of the series flow path through pressure pipes to form a closed hydraulic circuit.

[0014] As a further embodiment of the present invention, a piston is slidably connected inside the oil cylinder, a threaded sleeve is fixedly connected to the upper side wall of the piston, a screw is rotatably connected to the upper inner wall of the oil cylinder, and the screw is threadedly connected to the threaded sleeve. A second motor is fixedly connected to the upper end of the oil cylinder, and the output end of the second motor is fixedly connected to the screw.

[0015] As a further embodiment of the present invention, the rotating assembly includes a rotating sleeve fixedly connected to the rotating box, and the rotating sleeve is rotatably connected to the clamping ring shell. Two sprockets are rotatably connected inside the rotating box, and a chain is sleeved between the two sprockets.

[0016] As a further embodiment of the present invention, a transmission sleeve is fixedly connected between the sprockets in each pair of corresponding rotating boxes, a gear is fixedly connected in the middle of the transmission sleeve, a square rod is rotatably connected between the two mounting blocks, and the transmission sleeve is slidably connected to the square rod. A third motor is fixedly connected to the side wall of one of the mounting blocks, and the output end of the third motor is fixedly connected to the square rod. An annular toothed plate is rotatably connected inside the clamping ring shell, and the annular toothed plate meshes with the gear.

[0017] As a further embodiment of the present invention, the slag knocking assembly includes a frame, two cylinders are fixedly connected between the frame and the base, two mounting brackets are fixedly connected to the upper end of the frame, and rollers are rotatably connected inside the two mounting brackets.

[0018] As a further embodiment of the present invention, a rotary impact toothed cylinder is rotatably connected to the middle of the roller, the diameter of which is smaller than that of the roller.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. When in use, this invention can rotate the evaporator shell while clamping it. In conjunction with the conversion component and the telescopic adjustment component, it can mechanically grind the welding ends of evaporator shells of different diameters. At the same time, the telescopic adjustment component can increase the grinding area with the shell, significantly improving the cleaning effect, effectively removing the oxide layer at the welding end, and improving the welding quality.

[0021] 2. When using this invention, after the welding process is completed, the slag knocking component can effectively knock away excess welding slag in the welding area, further improving welding efficiency.

[0022] 3. When in use, the present invention can stably clamp the shell within a certain size range through the cooperation of the clamping component and the rotating component, which has strong adaptability and can also drive it to rotate, thereby further improving the efficiency of welding operations. Attached Figure Description

[0023] Figure 1 A three-dimensional view of a welding fixture for an evaporator shell;

[0024] Figure 2 This is a schematic diagram of the structure of a moving component in a welding fixture for an evaporator shell.

[0025] Figure 3 This is a schematic diagram of the structure of a welding fixture for an evaporator shell, specifically a clamping ring shell portion.

[0026] Figure 4 A cross-sectional view of the clamping component in a welding fixture for an evaporator shell;

[0027] Figure 5 This is a schematic diagram of the structure of a rotating component in a welding fixture for an evaporator shell.

[0028] Figure 6 This is a schematic diagram of the rotating sleeve portion in a welding fixture for an evaporator shell.

[0029] Figure 7 This is a schematic diagram of the structure of the conversion component in a welding fixture for an evaporator shell.

[0030] Figure 8 This is a schematic diagram of the telescopic adjustment component in a welding fixture for an evaporator shell.

[0031] Figure 9 for Figure 8 Enlarged view of point A in the middle;

[0032] Figure 10 A diagram showing the state of an evaporator shell welding fixture during slag removal;

[0033] Figure 11 This is a schematic diagram of the slag-removing component in a welding fixture for an evaporator shell.

[0034] In the picture:

[0035] 1. Moving component; 101. Base; 102. Mounting block; 103. Slide groove; 104. Sliding block; 105. Lead screw; 106. First motor;

[0036] 2. Clamping assembly; 201. Clamping ring shell; 202. Rotating box; 203. Clamping cylinder; 204. First connecting rod; 205. Second connecting rod; 206. Hydraulic cylinder; 207. Oil pipe; 208. Oil cylinder; 209. Pressure pipe; 210. Piston; 211. Threaded sleeve; 212. Screw; 213. Second motor;

[0037] 3. Rotating assembly; 301. Rotating sleeve; 302. Sprocket; 303. Chain; 304. Transmission sleeve; 305. Gear; 306. Square rod; 307. Third motor; 308. Annular toothed plate;

[0038] 4. Conversion assembly; 401. Connecting box; 402. Rotating cylinder; 403. Transmission gear; 404. Transmission rack; 405. Connecting plate; 406. Return spring; 407. Support post; 408. Fixing post; 409. Switch button;

[0039] 5. Telescopic adjustment assembly; 501. Support L-shaped plate; 502. Hydraulic cylinder; 503. Moving plug; 504. Push-pull rod; 505. Pressure cylinder; 506. Electromagnet; 507. Magnetic plug; 508. Connecting spring; 509. Connecting pipe;

[0040] 6. Grinding assembly; 601. Moving cylinder; 602. Pressure plug; 603. Support spring; 604. Connecting box; 605. Through pipe; 606. Moving plug; 607. Grinding cylinder;

[0041] 7. Slag knocking assembly; 701. Frame; 702. Cylinder; 703. Mounting bracket; 704. Roller; 705. Rotary impact cylinder. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Example 1: Please refer to Figures 1 to 9In this embodiment of the invention, a welding fixture for an evaporator shell includes a movable component 1. The movable component 1 includes a base 101. Two mounting blocks 102, which are annular at the top and square at the bottom, are fixedly connected to the upper side wall of the base 101. A sliding groove 103 for limiting the sliding block 104 is fixedly connected between the lower parts of the two mounting blocks 102. A lead rod 105, which is threadedly connected to the sliding block 104, is rotatably connected between the two mounting blocks 102. Two sliding blocks 104 are slidably connected inside the sliding groove 103 by means of groove engagement. Two threads are engraved on the lead rod 105, and the two threads are symmetrically arranged. When the lead rod 105 rotates, it can... The two sliding blocks 104 are driven to move closer and further apart. A first motor 106 is fixedly connected to the side wall of one of the mounting blocks 102 to drive the lead screw 105 to rotate, and the output end of the first motor 106 is fixedly connected to the lead screw 105 by bolts. A clamping assembly 2 for clamping the evaporator shell is fixedly connected to the upper end of each of the two sliding blocks 104. A rotating assembly 3 for driving the evaporator shell to rotate is fixedly connected inside the clamping assembly 2. A conversion assembly 4 for flipping the telescopic adjustment assembly 5 is fixedly connected to each of the two sliding blocks 104. A telescopic adjustment assembly 5 for driving the grinding assembly 6 to abut against the evaporator shell is fixedly connected to the conversion assembly 4.

[0044] The conversion assembly 4 includes two connecting boxes 401 fixedly connected to opposite sidewalls of two sliding blocks 104, respectively. A rotating cylinder 402 is rotatably connected between the opposite sidewalls of the two connecting boxes 401. A transmission gear 403 is rotatably connected inside the two connecting boxes 401, and the transmission gear 403 is fixedly connected to the rotating cylinder 402, so that the transmission gear 403 can rotate synchronously with the rotating cylinder 402. A sliding opening is cut inside the sliding block 104, and two transmission racks 404 are inserted into the sliding opening, and the transmission racks 404 mesh with the transmission gears 403. A connecting plate 405 is fixedly connected between the two transmission racks 404. A limit plate is fixedly connected between the ends of the two transmission gears 403 away from the connecting plate 405. When the return spring 406 returns to its original position, the limit plate will eventually abut against the rotating cylinder 402, thereby limiting the movement distance of the transmission racks 404 and ensuring that the stroke of the transmission racks 404 is within acceptable limits. The transmission gear 403 is rotated 180 degrees. A return spring 406 is fixedly connected between the connecting plate 405 and the opposite side wall of the sliding block 104. A stop post 407 is fixedly connected to the connecting plate 405. In the initial state of the connecting plate 405, the stop post 407 abuts against the sliding block 104, thus limiting the stroke of the transmission rack 404. Fixed posts 408 are fixedly connected to both rotating cylinders 402. A switch button 409 is fixedly connected to one of the fixed posts 408. When the two rotating cylinders 402 are close together, the switch button 409 is activated by the fixed post 408 to stop the movement of the sliding block 104, preventing the housing from continuing to move and colliding after docking, which would cause damage. When clamping the housing, the housing needs to abut against the supporting L-shaped plate 501. Therefore, the length of the fixed post 408 is such that when the two housings are close together, the fixed post 408 on the other side can just press the switch button 409.

[0045] The telescopic adjustment assembly 5 includes a support L-shaped plate 501 fixedly connected to the rotating cylinder 402. Two hydraulic cylinders 502, one upper and one lower, are fixedly connected to the support L-shaped plate 501 via an annular fixing sleeve. A movable plug 503 is slidably connected inside each of the two hydraulic cylinders 502. A push-pull rod 504 is fixedly connected to the opposite side wall of each of the two hydraulic cylinders 502. A grinding assembly 6, used to increase the contact area with the evaporator shell and achieve grinding via a grinding cylinder 607, is slidably connected to the lower end of the push-pull rod 504. When the internal pressure of the hydraulic cylinder 502 increases, the movable plug 503 moves, causing the grinding assembly 6 to contact the evaporator shell, enabling the grinding assembly 6 to grind the shell. A device for grinding the hydraulic cylinders 502 is fixedly connected to the side wall of the support L-shaped plate 501. The pressure cylinder 505, the connecting pipe 509, and the hydraulic cylinder 502 are all filled with hydraulic oil. An electromagnet 506 is fixedly connected to the end of the pressure cylinder 505 away from the supporting L-shaped plate 501, which can push the magnetic plug 507 to move by repulsion. The magnetic plug 507 is slidably connected inside the pressure cylinder 505. When the magnetic plug 507 moves, it can push the hydraulic oil into the hydraulic cylinder 502 through the connecting pipe 509, so that the moving plug 503 moves under pressure. A connecting spring 508 that helps the magnetic plug 507 to reset is fixedly connected between the magnetic plug 507 and the pressure cylinder 505. A connecting pipe 509 for transmitting hydraulic oil is connected between the pressure cylinder 505 and the hydraulic cylinder 502. A slag knocking assembly 7 is provided on the upper side wall of the base 101.

[0046] The grinding assembly 6 includes a movable cylinder 601 slidably connected to the lower end of the push-pull rod 504. A pressure plug 602 is slidably connected inside the movable cylinder 601 and is fixedly connected to the lower end of the push-pull rod 504. The space below the pressure plug 602 in the movable cylinder 601 is filled with a transmission fluid. A support spring 603 is fixedly connected between the pressure plug 602 and the upper inner wall of the movable cylinder 601. A connecting box 604 is connected to the lower end of the movable cylinder 601. Multiple connecting pipes 605 are connected to and fixed to the lower end of the connecting box 604. Each of the multiple connecting pipes 605 has a sliding plug 606 slidably connected inside. A grinding cylinder 607 is fixedly connected to the lower side wall of the moving plug 606. The surface of the grinding cylinder 607 is roughened. When the evaporator shell rotates, the grinding cylinder 607 can grind the shell and effectively clean the oxide layer. When the push-pull rod 504 approaches the shell, the grinding cylinder 607 will first abut against the shell. Then the pressure plug 602 will squeeze the transmission liquid inside the moving cylinder 601, so that multiple grinding cylinders 607 can abut against the shell. In this way, when facing shells of different diameters, multiple grinding cylinders 607 can fit the shell surface with different curvatures.

[0047] The clamping assembly 2 includes a clamping ring shell 201. Four corresponding rotating boxes 202 are rotatably connected to the inner walls of both sides of the clamping ring shell 201. A clamping cylinder 203 for direct contact with the evaporator shell is rotatably connected between each pair of corresponding rotating boxes 202. A rubber layer is fixed to the surface of the clamping cylinder 203 to increase friction and facilitate rotation of the evaporator shell. A first connecting rod 204 is fixedly connected between each pair of corresponding rotating boxes 202. Multiple second connecting rods are fixedly connected inside the clamping ring shell 201. A hydraulic cylinder 206 is rotatably connected between the first connecting rod 204 and the second connecting rod 205. When the hydraulic cylinder 206 extends, it can push the rotating box 202 to rotate via the first connecting rod 204. In turn, the rotating box 202 drives the clamping cylinder 203 to effectively clamp the evaporator shell. The oil outlets and oil inlets of multiple hydraulic cylinders 206 are connected in series via oil pipes 207 to form a series flow path. When one oil pipe 207 extends, the oil discharged from it can drive the oil pipes 206 connected in series with it. 7. Simultaneous extension, thereby achieving the purpose of simultaneous extension and retraction of multiple oil pipes 207. An oil cylinder 208 for oil supply and pressurization is fixedly connected to the clamping ring shell 201. The two oil inlet and outlet ports of the oil cylinder 208 are connected to two oil cylinders 206 at both ends of the series flow path through pressure pipes 209, forming a closed hydraulic circuit. A piston 210 is slidably connected inside the oil cylinder 208. A threaded sleeve 211 is fixedly connected to the upper side wall of the piston 210. A screw 212 is rotatably connected to the inner wall of the oil cylinder 208, and the screw 212 is connected to the threaded sleeve 211. 1. Threaded connection. The oil cylinder 208 is also equipped with a limiting structure for the threaded sleeve 211, which can prevent the screw 212 from rotating under the action of friction when it is rotating. The upper end of the oil cylinder 208 is fixedly connected to the second motor 213, and the output end of the second motor 213 is fixedly connected to the screw 212. When the second motor 213 is started, the screw 212 can drive the threaded sleeve 211 to move, so that the piston 210 moves to inject oil into one of the oil cylinders 206, so as to realize the synchronous extension and retraction of multiple oil cylinders 206.

[0048] The rotating assembly 3 includes a rotating sleeve 301 fixedly connected to the rotating box 202, and the rotating box 202 is rotatably connected to the clamping ring shell 201 through the rotating sleeve 301. Two sprockets 302 are rotatably connected inside the rotating box 202, and a chain 303 is sleeved between the two sprockets 302. A transmission sleeve 304 is fixedly connected between each pair of corresponding sprockets 302 in the rotating box 202. A gear 305 is fixedly connected to the middle of the transmission sleeve 304. A square rod 306 is rotatably connected between the two mounting blocks 102, and both the transmission sleeve 304 and the sprockets 302 are slidably connected to the square rod 306. The square rod 306 drives the sprocket 302 and gear 305 to rotate. At the same time, one of the gears 305 drives multiple gears 305 to rotate simultaneously through the annular toothed plate 308. When the gears 305 rotate, they can drive the clamping cylinder 203 to rotate through the chain 303, thereby driving the evaporator shell to rotate. A third motor 307 is fixedly connected to the side wall of one of the mounting blocks 102, and the output end of the third motor 307 is fixedly connected to the square rod 306. The annular toothed plate 308 is rotatably connected inside the clamping ring shell 201, and the annular toothed plate 308 meshes with the gear 305.

[0049] Example 2: Please refer to Figures 10 to 11 Based on Embodiment 1, the slag-removing assembly 7 includes a frame 701. Two cylinders 702 are fixedly connected between the frame 701 and the base 101 to drive the frame 701 to move up and down. Two mounting brackets 703 are fixedly connected to the upper end of the frame 701. Rollers 704 are rotatably connected inside the two mounting brackets 703. A rotary impacting toothed cylinder 705 is rotatably connected to the middle of the roller 704. The diameter of the rotary impacting toothed cylinder 705 is smaller than that of the roller 704. The cylinders 702 can drive the frame 701 to move upward, so that the rotary impacting toothed cylinder 705 in the middle of the roller 704 can abut against the weld seam of the shell. When the welding flux is too thick, the surface slag will abut against the rotary impacting toothed cylinder 705. The rotating assembly 3 drives the shell to rotate, so that the flux can also drive the rotary impacting toothed cylinder 705 to rotate. In this process, the rotary impacting toothed cylinder 705 knocks against the slag through the teeth on its surface, causing the slag to fall off.

[0050] The working principle of this invention is:

[0051] In its initial state, the mounting block 102 abuts against the connecting plate 405, causing the telescopic adjustment component 5 to be in an upright position. Figure 7As shown, during use, the operator first uses a lifting device to place the evaporator shell into the center of the clamping ring shell 201, so that the welded end of the evaporator shell can abut against the supporting L-shaped plate 501. Then, by starting the second motor 213, the screw 212 is rotated, which drives the threaded sleeve 211 to move, causing the piston 210 to move and inject oil into one of the oil cylinders 206, so as to realize the synchronous extension and retraction of multiple oil cylinders 206. When multiple oil cylinders 206 extend synchronously, multiple clamping cylinders 203 clamp the evaporator shell.

[0052] At this time, the staff will start the electromagnet 506 again. The electromagnet 506 pushes the magnetic plug 507 to move through the repulsive force. When the magnetic plug 507 moves, it can push the hydraulic oil into the hydraulic cylinder 502 through the connecting pipe 509, so that the moving plug 503 moves under pressure and drives the grinding assembly 6 to contact the evaporator shell. When the push-pull rod 504 approaches the shell, the grinding cylinder 607 will first abut against the shell. Then the pressure plug 602 will squeeze the transmission fluid inside the moving cylinder 601, so that multiple grinding cylinders 607 can abut against the shell. In this way, when facing shells of different diameters, multiple grinding cylinders 607 can fit the shell surface of different curvatures.

[0053] Then, the staff starts the third motor 307. The third motor 307 drives the sprocket 302 and gear 305 to rotate through the square rod 306. At the same time, one of the gears 305 drives multiple gears 305 to rotate simultaneously through the ring tooth plate 308. When the gears 305 rotate, they can drive the clamping cylinder 203 to rotate through the chain 303, thereby driving the evaporator shell to rotate. During the rotation of the evaporator shell, the grinding cylinder 607 can effectively grind the welding area. After grinding, the electromagnet 506 is turned off. At this time, the magnetic plug 507 is reset, which makes the two grinding components 6 separate and no longer contact the evaporator shell. Then, the first motor 106 is started to drive the two sliding blocks 104 and the two shells to move closer to each other. During this process, the connecting plate 405 is reset under the action of the abutment 407, which makes the transmission rack 404 move and drive the rotating cylinder 402 to rotate 180 degrees through meshing with the transmission gear 403. At this time, the two fixed columns 408 are opposite and close to each other.

[0054] When the welded ends of the evaporator shells abut together, the fixed column 408 can press the switch button 409, thereby controlling the first motor 106 to stop rotating. At this time, the operator can restart the third motor 307 to rotate the shells, helping the operator to weld the two shells together. After welding is completed, the cylinder 702 is started, which can drive the frame 701 to move upward, so that the rotary impact cylinder 705 in the middle of the roller 704 can abut against the weld seam of the shell. When the welding flux is too thick, the surface slag will abut against the rotary impact cylinder 705. The rotating component 3 drives the shell to rotate, so that the flux can also drive the rotary impact cylinder 705 to rotate. In this process, the rotary impact cylinder 705 uses the teeth on its surface to knock the slag, causing the slag to fall off, thereby improving welding efficiency.

[0055] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A welding fixture for an evaporator shell, characterized in that, The system includes a moving component (1), which includes a base (101). Two mounting blocks (102) are fixedly connected to the upper side wall of the base (101). A slide groove (103) is fixedly connected between the two mounting blocks (102). A lead screw (105) is rotatably connected between the two mounting blocks (102). Two sliding blocks (104) are slidably connected inside the slide groove (103). A first motor (106) is fixedly connected to the side wall of one of the mounting blocks (102), and the output end of the first motor (106) is fixedly connected to the lead screw (105). A clamping component (2) is fixedly connected to the upper end of each of the two sliding blocks (104). A rotating component (3) is fixedly connected inside the clamping component (2). A conversion component (4) is fixedly connected to each of the two sliding blocks (104). A telescopic adjustment component (5) is fixedly connected to the conversion component (4). The conversion assembly (4) includes two connecting boxes (401) fixedly connected to the opposite sidewalls of two sliding blocks (104), a rotating cylinder (402) rotatably connected between the two connecting boxes (401), a transmission gear (403) rotatably connected inside the two connecting boxes (401), and the transmission gear (403) fixedly connected to the rotating cylinder (402). Two transmission racks (404) are inserted into the sliding blocks (104), and the transmission racks (404) mesh with the transmission gears (403). A connecting plate (405) is fixedly connected between the two transmission racks (404), a return spring (406) is fixedly connected between the connecting plate (405) and the sliding blocks (104), a stop post (407) is fixedly connected to the connecting plate (405), a fixing post (408) is fixedly connected to the rotating cylinder (402), and a switch button (409) is fixedly connected to the fixing post (408). The telescopic adjustment assembly (5) includes a support L-shaped plate (501) fixedly connected to the rotating cylinder (402). Two hydraulic cylinders (502) are fixedly connected to the support L-shaped plate (501). A movable plug (503) is slidably connected inside each of the two hydraulic cylinders (502). A push-pull rod (504) is fixedly connected to the opposite side wall of each of the two hydraulic cylinders (502). A grinding assembly (6) is slidably connected to the lower end of the push-pull rod (504). A pressure cylinder (505) is fixedly connected to the side wall of the support L-shaped plate (501). An electromagnet (506) is fixedly connected to one end of the pressure cylinder (505) away from the supporting L-shaped plate (501). A magnetic plug (507) is slidably connected inside the pressure cylinder (505). A connecting spring (508) is fixedly connected between the magnetic plug (507) and the pressure cylinder (505). A connecting pipe (509) connects the pressure cylinder (505) and the hydraulic cylinder (502). The grinding assembly (6) includes a movable cylinder (601) slidably connected to the lower end of the push-pull rod (504). A pressure plug (602) is slidably connected inside the cylinder (601), and the pressure plug (602) is fixedly connected to the lower end of the push-pull rod (504). A support spring (603) is fixedly connected between the pressure plug (602) and the upper inner wall of the moving cylinder (601). A connecting box (604) is connected to the lower end of the moving cylinder (601), and multiple connecting pipes (605) are connected to the lower end of the connecting box (604). Each of the multiple connecting pipes (605) has a sliding plug (606) slidably connected inside. A grinding cylinder (607) is fixedly connected to the lower side wall of the sliding plug (606). The base (101) is provided with a slag-beating assembly (7) on its upper side wall. The slag-beating assembly (7) includes a frame (701). Two cylinders (702) are fixedly connected between the frame (701) and the base (101). Two mounting brackets (703) are fixedly connected to the upper end of the frame (701). Rollers (704) are rotatably connected inside the two mounting brackets (703). A rotary impact toothed cylinder (705) is rotatably connected in the middle of the roller (704). The diameter of the rotary impact toothed cylinder (705) is smaller than that of the roller (704).

2. The evaporator shell welding fixture according to claim 1, characterized in that, The clamping assembly (2) includes a clamping ring shell (201), and multiple corresponding rotating boxes (202) are rotatably connected to the inner walls of the left and right sides of the clamping ring shell (201). A clamping cylinder (203) is rotatably connected between each pair of corresponding rotating boxes (202).

3. The evaporator shell welding fixture according to claim 2, characterized in that, Each pair of corresponding rotating boxes (202) is fixedly connected to a first connecting rod (204). Multiple second connecting rods (205) are fixedly connected inside the clamping ring shell (201). A hydraulic cylinder (206) is rotatably connected between the first connecting rod (204) and the second connecting rod (205). Multiple hydraulic cylinders (206) are connected in series through oil pipes (207) to form a series flow path. An oil cylinder (208) is fixedly connected to the clamping ring shell (201). The oil cylinder (208) is connected to two hydraulic cylinders (206) at both ends of the series flow path through pressure pipes (209) to form a closed hydraulic circuit.

4. The evaporator shell welding fixture according to claim 3, characterized in that, A piston (210) is slidably connected inside the oil cylinder (208). A threaded sleeve (211) is fixedly connected to the upper side wall of the piston (210). A screw (212) is rotatably connected to the upper inner wall of the oil cylinder (208), and the screw (212) is threadedly connected to the threaded sleeve (211). A second motor (213) is fixedly connected to the upper end of the oil cylinder (208), and the output end of the second motor (213) is fixedly connected to the screw (212).

5. The evaporator shell welding fixture according to claim 2, characterized in that, The rotating assembly (3) includes a rotating sleeve (301) fixedly connected to the rotating box (202), and the rotating sleeve (301) is rotatably connected to the clamping ring shell (201). Two sprockets (302) are rotatably connected inside the rotating box (202), and a chain (303) is sleeved between the two sprockets (302).

6. The evaporator shell welding fixture according to claim 5, characterized in that, A transmission sleeve (304) is fixedly connected between the sprockets (302) in each pair of corresponding rotating boxes (202). A gear (305) is fixedly connected in the middle of the transmission sleeve (304). A square rod (306) is rotatably connected between the two mounting blocks (102), and the transmission sleeve (304) is slidably connected to the square rod (306). A third motor (307) is fixedly connected to the side wall of one of the mounting blocks (102), and the output end of the third motor (307) is fixedly connected to the square rod (306). An annular toothed plate (308) is rotatably connected inside the clamping ring shell (201), and the annular toothed plate (308) meshes with the gear (305).

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