Transportation liquid tank assembly welding device

Abstract

The invention discloses a transportation liquid tank assembly welding device which comprises a movable supporting seat and a vertical supporting rod fixedly installed at the top of the movable supporting seat, and a height adjusting piece used for lifting is installed on the surface of the vertical supporting rod in a sliding mode. The welding position adjusting part in the welding mechanism plays a key role, the first hydraulic rod can stretch out and draw back to push the supporting frame to flexibly slide in the sliding cavity, so that the welding position is adjusted, when the welding mechanism faces transportation liquid tanks of different specifications, the welding unit can be rapidly moved to the proper initial position, and the welding efficiency is improved. A third servo motor drives a first bevel gear to rotate, through meshing with a second bevel gear, a screw rod rotates synchronously, rotation of the screw rod drives welding units to move on the screw rod, and the two welding units are arranged and located on the inner side and the outer side of the to-be-welded liquid tank correspondingly. The two welding units can weld the inner side and the outer side of the liquid tank at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of transport liquid tank assembly welding, in particular to a transport liquid tank assembly welding device. Background Art

[0002] Liquid transport tanks are containers specially designed for transporting various liquid goods. They play a vital role in many fields such as industry and commerce. Liquid transport tanks are mainly used to transport various liquid substances from one location to another safely and efficiently, meeting the needs of different industries for liquid raw materials, finished products, etc. For example, the petrochemical industry transports mined or produced oil products to refineries and gas stations; the food industry transports milk, juice, etc. to processing plants or sales points.

[0003] At present, the transport tank assembly is usually welded together by multiple components such as the tank body, head, pipe, bracket, etc. However, in the existing technology, there are many problems in the welding work of the transport tank:

[0004] First, existing welding equipment is difficult to achieve universal welding of transport liquid tanks of different specifications. Due to the large differences in parameters such as size and shape of transport liquid tanks, traditional welding equipment can only weld tanks of specific specifications. When welding tanks of different specifications, the entire set of welding equipment needs to be replaced;

[0005] Second, the existing welding process usually forms a weld on the outside of the tank first, and then workers enter the tank to work and form the weld inside the tank. However, due to the small internal space of the small liquid tank, the working environment is limited when welding inside it, and the labor intensity is high, resulting in low efficiency in welding fermentation tanks. Summary of the Invention

[0006] The object of the present invention is to provide a transport liquid tank assembly welding device to solve the problems raised in the above background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions: a transport liquid tank assembly welding device, comprising a movable support base and a vertical support rod fixedly mounted on the top thereof, a height adjustment member for lifting and lowering being slidably mounted on the surface of the vertical support rod, and a welding mechanism fixedly mounted on one side of the height adjustment member for welding the liquid tank;

[0008] The welding mechanism includes a mounting seat fixedly mounted on one side of the height adjustment member, the surface of the mounting seat is provided with two sliding cavities, and support frames are slidably mounted inside the two sliding cavities, and welding position adjustment members are installed on the surfaces of the support frame and the mounting seat for synchronously welding the inner and outer sides of the liquid tank;

[0009] The welding position adjustment member includes two first hydraulic rods installed through both ends of the mounting base, the telescopic ends of the two first hydraulic rods are installed inside the sliding cavity, and the telescopic ends of the two first hydraulic rods are fixedly connected to one side of the two support frames;

[0010] The interior of the two support frames are threadedly connected with screws, and the surface of the screws is threadedly connected with welding units for welding the liquid tank.

[0011] A moving member is installed at the bottom of the movable support seat for laterally moving the movable support seat.

[0012] Preferably, a transmission cavity is opened at one end of the two support frames, one end of the two screw rods passes through the support frame and extends into the transmission cavity, a first bevel gear is fixedly installed on one end of the screw located in the transmission cavity, a sleeve rod is rotatably installed in the interior of the mounting seat through a bearing, and a telescopic rod is slidably installed on both ends of the sleeve rod, the two telescopic rods one end away from the sleeve rod passes through the support frame and extends into the transmission cavity, and a second bevel gear is fixedly installed on one end of the telescopic rod located in the transmission cavity, and the second bevel gear is meshed with the first bevel gear, wherein a third servo motor is fixedly installed at one end of one of the support frames, and an output end of the third servo motor passes through the support frame and extends into the transmission cavity, and an output end of the third servo motor is fixedly connected to the first bevel gear;

[0013] Limiting convex strips are fixedly installed around the surfaces of the two telescopic rods, and limiting grooves adapted to the limiting convex strips are opened inside the sleeve rods. The sleeve rods are slidably connected to the limiting convex strips through the limiting grooves.

[0014] Preferably, the welding unit includes two threaded seats threadedly connected to the surfaces of two screw rods, and a mounting plate is fixedly installed on the top of the two threaded seats, the bottom of the mounting plate is slidably connected to the top of the support frame, a second hydraulic rod is installed on the top of the mounting plate, and a mounting block is fixedly installed on the output end of the second hydraulic rod, and a welding gun for welding is installed on the top of the mounting block.

[0015] Preferably, a mounting groove is provided on one side of the top of the mounting block, a movable housing is slidably mounted inside the mounting groove, and a second rack is fixedly mounted on the bottom of the inner cavity of the movable housing;

[0016] A second servo motor is installed through one side of the installation slot, and a second transmission gear is fixedly installed on the output end of the second servo motor. The second transmission gear is meshed with the second rack.

[0017] Preferably, the height adjustment member includes a first rack embedded in one side of the vertical support rod, a sliding shell is provided on the surface of the vertical support rod, and the sliding shell and the vertical support rod are slidably connected, a first servo motor is installed on one side of the sliding shell, the output end of the first servo motor passes through the sliding shell and extends to the interior of the sliding shell, a rotating rod is fixedly installed on the output end of the first servo motor, a first transmission gear is installed on the surface of the rotating rod, and one side of the first transmission gear passes through the sliding shell and is meshed with the first rack.

[0018] Preferably, sliding grooves are provided on both the front and rear sides of the vertical support rod, and sliders adapted to the sliding grooves are installed at the sliding portion between the sliding housing and the vertical support rod, and the sliding housing is slidably connected to the sliding grooves via the sliders.

[0019] Preferably, the moving part includes two electric slide rails installed on the ground, and electric slide seats are slidably installed on the surfaces of the two electric slide rails, and the tops of the two electric slide seats are fixedly connected to the bottom of the moving support seat.

[0020] Preferably, the number of the welding units is two groups, and the two groups of welding units are respectively located on the inner and outer sides of the liquid tank to be welded, so as to be used for synchronously welding the inner and outer sides of the liquid tank to be welded.

[0021] Preferably, two brackets are fixedly installed on the top of the mobile shell, the welding gun is installed between the two brackets, bolts are installed through the top of the two bracket surfaces, and the two brackets are fixedly connected to the welding gun by bolts for disassembly, assembly and replacement of the welding gun.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The welding position adjustment member in the welding mechanism of the present invention plays a key role. Among them, the extension and retraction of the first hydraulic rod can push the support frame to slide flexibly in the sliding cavity, thereby adjusting the welding position. When facing transport liquid tanks of different specifications, the welding unit can be quickly moved to the appropriate initial position. The third servo motor drives the first bevel gear to rotate, and through engagement with the second bevel gear, the screw rotates synchronously. The rotation of the screw drives the welding unit to move on the screw, and the welding units are arranged in two groups, which are respectively located on the inner and outer sides of the liquid tank to be welded. Therefore, during the welding process, the two groups of welding units can weld the inner and outer sides of the liquid tank at the same time, avoiding the tedious process of welding outside the tank first and then letting workers enter the tank to work in the traditional welding process. Moreover, this method of synchronous welding of the inside and outside not only reduces the labor intensity of workers entering the narrow tank to work, but also greatly improves the welding efficiency. At the same time, since the device can adapt to the adjustment needs of liquid tanks of different specifications, there is no need to replace the entire set of equipment, thereby enhancing the versatility and applicability of the device.

[0024] 2. The welding unit of the present invention has a multi-dimensional precise adjustment function to ensure the accuracy of the welding position. The setting of the second hydraulic rod enables the horizontal position of the welding gun to be finely adjusted. According to the specific welding requirements of the liquid tank, the extension and contraction amount of the second hydraulic rod can be flexibly controlled to make the welding gun reach the appropriate welding position. The second servo motor can drive the second transmission gear to rotate, and the second transmission gear engages with the second rack, so that the movable housing slides in the installation groove to achieve precise fine-tuning of the lateral position of the welding gun. Therefore, during the welding process, this precise position adjustment function can adjust the position of the welding gun in real time and accurately according to the actual situation of the welding part, ensuring that the welding gun and the welding part maintain the best relative position relationship. Through multi-dimensional precise adjustment, the accuracy and stability of the welding process are greatly improved, thereby ensuring the welding quality and reducing the occurrence of welding defects.

[0025] 3. The first servo motor in the height adjustment member of the present invention drives the rotating rod to rotate, so that the first transmission gear engages with the first rack, thereby driving the sliding shell to slide on the vertical support rod to achieve height adjustment of the welding mechanism, and the electric slide rail and electric slide seat of the moving member can move the mobile support seat laterally. These adjustment methods enable the device to adapt to the welding requirements of transport liquid tanks of different specifications without replacing the entire set of welding equipment, thereby improving the versatility of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the welding mechanism of the present invention;

[0028] Figure 3 This is a structural schematic diagram of the welding position adjusting member of the present invention;

[0029] Figure 4 Schematic diagram of the cross-sectional structure of the support frame of the present invention;

[0030] Figure 5 This is a schematic structural diagram of a welding unit according to the present invention;

[0031] Figure 6 is a schematic diagram of the cross-sectional structure of the mounting block in the present invention;

[0032] Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure at A in the middle;

[0033] Figure 8 For the present invention Figure 3 Schematic diagram of the enlarged structure at point B in the middle.

[0034] In the figure: 1. movable support base; 2. vertical support rod; 3. height adjustment member; 31. first rack; 32. sliding housing; 33. first servo motor; 34. rotating rod; 35. first transmission gear; 36. slide groove; 37. slider; 4. welding mechanism; 41. mounting base; 42. sliding cavity; 43. support frame; 44. welding position adjustment member; 441. first hydraulic rod; 442. screw; 443. welding unit; 4431. threaded seat; 4432. mounting plate; 44 33. Second hydraulic rod; 4434. Mounting block; 4435. Welding gun; 4436. Mounting slot; 4437. Moving housing; 4438. Second rack; 4439. Second servo motor; 44301. Second transmission gear; 444. Transmission chamber; 445. First bevel gear; 446. Sleeve rod; 447. Telescopic rod; 448. Second bevel gear; 449. Third servo motor; 4401. Limiting ridge; 5. Moving part; 51. Electric slide rail; 52. Electric slide seat. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] See also Figures 1-8 The present invention provides a technical solution: a transport liquid tank assembly welding device, comprising a movable support base 1, and a vertical support rod 2 fixedly mounted on the top thereof, a height adjustment member 3 for lifting and lowering being slidably mounted on the surface of the vertical support rod 2, and a welding mechanism 4 fixedly mounted on one side of the height adjustment member 3 for welding the liquid tank;

[0037] The welding mechanism 4 includes a mounting base 41 fixedly mounted on one side of the height adjustment member 3. The surface of the mounting base 41 is provided with two sliding cavities 42, and a support frame 43 is slidably mounted inside each of the two sliding cavities 42. The support frame 43 and the surface of the mounting base 41 are both mounted with welding position adjustment members 44 for synchronously welding the inner and outer sides of the liquid tank.

[0038] The welding position adjustment member 44 includes two first hydraulic rods 441 installed at both ends of the mounting base 41. The telescopic ends of the two first hydraulic rods 441 are both installed inside the sliding cavity 42. The telescopic ends of the two first hydraulic rods 441 are both fixedly connected to one side of the two support frames 43.

[0039] The interior of the two support frames 43 is threadedly connected to a screw rod 442, and the surface of the screw rod 442 is threadedly connected to a welding unit 443 for welding the liquid tank.

[0040] A moving member 5 is installed at the bottom of the movable support base 1 for moving the movable support base 1 laterally.

[0041] Reference Figure 2 、 Figure 3 as well as Figure 4 As shown, a transmission cavity 444 is provided at one end of the two support frames 43, and one end of the two screw rods 442 passes through the support frame 43 and extends into the transmission cavity 444. A first bevel gear 445 is fixedly installed on one end of the screw rod 442 located in the transmission cavity 444. A sleeve rod 446 is rotatably installed in the interior of the mounting seat 41, and a telescopic rod 447 is slidably installed on both ends of the sleeve rod 446. The two telescopic rods 447, one end away from the sleeve rod 446, pass through the support frame 43 and extend into the transmission cavity 444, and a second bevel gear 448 is fixedly installed on one end of the telescopic rod 447 located in the transmission cavity 444, and the second bevel gear 448 is meshed with the first bevel gear 445. A third servo motor 449 is fixedly installed at one end of one support frame 43, and an output end of the third servo motor 449 passes through the support frame 43 and extends into the transmission cavity 444, and an output end of the third servo motor 449 is fixedly connected to the first bevel gear 445.

[0042] The two telescopic rods 447 are fixedly mounted with limiting ridges 4401 on all sides. The sleeve rod 446 is provided with limiting grooves adapted to the limiting ridges 4401. The sleeve rod 446 is slidably connected to the limiting ridges 4401 through the limiting grooves.

[0043] In this embodiment, when welding is required on both the inner and outer sides of the liquid tank, the first hydraulic rod 441 is extended and retracted to push the support frame 43 to slide in the sliding cavity 42, thereby adjusting the distance between the two support frames 43 to meet the welding requirements of liquid tanks of different sizes. The third servo motor 449 is started, and its output end drives the first bevel gear 445 to rotate. Since the first bevel gear 445 is engaged with the second bevel gear 448, the second bevel gear 448 drives the telescopic rod 447 to rotate. The telescopic rod 447 drives the sleeve rod 446 to rotate through the limiting ridge 4401 and the limiting groove, thereby causing the telescopic rod 447 and the second bevel gear 448 on the other side to drive the first bevel gear 445 on the other side to rotate, thereby achieving synchronous rotation of the two screws 442. The rotation of the screw 442 drives the welding unit 443 to move on the screw 442 to weld the liquid tank.

[0044] The present invention can also achieve synchronous welding of the inner and outer sides of the liquid tank, thereby improving welding efficiency. At the same time, the position of the support frame 43 can be adjusted by the first hydraulic rod 441 to adapt to liquid tanks of different sizes, thereby enhancing the versatility of the device. The transmission structure of the bevel gear and the telescopic rod 447 is utilized to ensure the synchronous rotation of the screws 442 on both sides, thereby making the welding process more stable.

[0045] Reference Figure 5 as well as Figure 6 As shown, the welding unit 443 includes two threaded seats 4431 threadedly connected to the surfaces of the two screw rods 442, and the tops of the two threaded seats 4431 are fixedly mounted with mounting plates 4432, the bottoms of the mounting plates 4432 are slidably connected to the top of the support frame 43, the tops of the mounting plates 4432 are mounted with a second hydraulic rod 4433, and the output end of the second hydraulic rod 4433 is fixedly mounted with a mounting block 4434, and the top of the mounting block 4434 is mounted with a welding gun 4435 for welding;

[0046] In this embodiment, when the screw 442 rotates, the threaded seat 4431 moves on the screw 442, driving the mounting plate 4432 to slide on the top of the support frame 43, thereby realizing the movement of the welding unit 443 in the length direction of the screw 442, and through the extension and retraction of the second hydraulic rod 4433, the height of the mounting block 4434 and the welding gun 4435 can be adjusted to adapt to different welding positions, and thereby the welding position of the welding gun 4435 can be flexibly adjusted, thereby improving the accuracy and flexibility of welding and meeting the needs of different welding conditions.

[0047] Reference Figure 6 as well as Figure 7 As shown, a mounting groove 4436 is formed on one side of the top of the mounting block 4434. A movable housing 4437 is slidably mounted inside the mounting groove 4436. A second rack 4438 is fixedly mounted on the bottom of the inner cavity of the movable housing 4437.

[0048] A second servo motor 4439 is installed through one side of the installation slot 4436 , and a second transmission gear 44301 is fixedly installed on the output end of the second servo motor 4439 . The second transmission gear 44301 is meshedly connected to the second rack 4438 .

[0049] In this embodiment, the second servo motor 4439 is started, and its output end drives the second transmission gear 44301 to rotate. Since the second transmission gear 44301 is engaged with the second rack 4438, the movable housing 4437 is driven to slide in the mounting groove 4436, thereby adjusting the lateral position of the welding gun 4435 on the mounting block 4434. In this way, the lateral position of the welding gun 4435 can be accurately adjusted, further improving the accuracy of welding, and allowing more precise operations to be performed on the welding parts of the liquid tank.

[0050] Reference Figure 3 as well as Figure 8 As shown, the height adjustment member 3 includes a first rack 31 embedded in one side of the vertical support rod 2, a sliding housing 32 is sleeved on the surface of the vertical support rod 2, and the sliding housing 32 and the vertical support rod 2 are slidably connected. A first servo motor 33 is installed on one side of the sliding housing 32, and the output end of the first servo motor 33 passes through the sliding housing 32 and extends into the interior of the sliding housing 32. A rotating rod 34 is fixedly installed on the output end of the first servo motor 33, and a first transmission gear 35 is installed on the surface of the rotating rod 34. One side of the first transmission gear 35 passes through the sliding housing 32 and is meshed with the first rack 31;

[0051] In this embodiment, the first servo motor 33 is started, and its output end drives the rotating rod 34 to rotate, and the rotating rod 34 drives the first transmission gear 35 to rotate. Since the first transmission gear 35 is engaged with the first rack 31, the sliding housing 32 slides on the vertical support rod 2, thereby realizing the height adjustment of the welding mechanism 4 to adapt to the welding requirements of liquid tanks of different heights, thereby improving the applicability of the device.

[0052] Reference Figure 3 as well as Figure 8 As shown, a slide groove 36 is provided on both the front and rear sides of the vertical support rod 2, and a slider 37 adapted to the slide groove 36 is installed at the sliding portion between the sliding housing 32 and the vertical support rod 2, and the sliding housing 32 is slidably connected to the slide groove 36 through the slider 37;

[0053] In this embodiment, when the sliding housing 32 slides on the vertical support rod 2 , the slider 37 slides in the slide groove 36 , thereby playing a guiding and limiting role, ensuring that the sliding housing 32 slides smoothly on the vertical support rod 2 .

[0054] Reference Figure 1 as well as Figure 2 As shown, the moving member 5 includes two electric slide rails 51 installed on the ground, and the surfaces of the two electric slide rails 51 are slidably mounted with electric slide seats 52, and the tops of the two electric slide seats 52 are fixedly connected to the bottom of the moving support base 1;

[0055] In this embodiment, the electric slide 51 is started, and the electric slide 52 slides on the electric slide 51, driving the movable support seat 1 to move laterally, so that the entire welding device can be moved in the lateral direction to a suitable welding position; so that the position of the device can be flexibly adjusted according to the position of the liquid tank and the welding requirements, thereby improving the convenience of welding.

[0056] Reference Figure 2 as well as Figure 3 As shown, there are two groups of welding units 443, and the two groups of welding units 443 are respectively located on the inner and outer sides of the liquid tank to be welded, so as to be used for synchronously welding the inner and outer sides of the liquid tank to be welded;

[0057] In this embodiment, the inner and outer sides of the liquid tank can be welded simultaneously, which greatly improves the welding efficiency, makes the welding quality of the inner and outer sides of the liquid tank more balanced, and enhances the overall strength of the welding part of the liquid tank.

[0058] Reference Figure 5 as well as Figure 6 As shown, two brackets are fixedly installed on the top of the mobile housing 4437, and the welding gun 4435 is installed between the two brackets. Bolts are installed through the top of the surface of the two brackets, and the two brackets are fixedly connected to the welding gun 4435 by bolts, so as to facilitate the disassembly, assembly and replacement of the welding gun 4435.

[0059] In this embodiment, the welding gun 4435 can be easily disassembled, assembled and replaced. When the welding gun 4435 is damaged or needs to be replaced with a welding gun 4435 of different specifications, the operation can be performed quickly, which reduces the time for equipment maintenance and replacement and improves work efficiency.

[0060] Working principle: During the welding process, first, the first servo motor 33 in the height adjustment member 3 is started according to the height of the liquid tank. The first servo motor 33 drives the rotating rod 34 to rotate, so that the first transmission gear 35 connected to the rotating rod 34 engages with the first rack 31, and then drives the sliding housing 32 to slide in the slide groove 36 of the vertical support rod 2 through the slider 37, thereby adjusting the welding mechanism 4 to a suitable height;

[0061] Then, the electric slide rail 51 and the electric slide seat 52 of the moving member 5 are used to move the movable support base 1 laterally, and the welding mechanism 4 is accurately moved to the welding position of the liquid tank;

[0062] Next, the first hydraulic rod 441 of the welding position adjustment member 44 is activated. The telescopic end of the first hydraulic rod 441 pushes the support frame 43 to slide in the sliding cavity 42, thereby adjusting the welding position so that the two sets of welding units 443 are respectively located on the inner and outer sides of the liquid tank to be welded.

[0063] Then, the third servo motor 449 is started, and the third servo motor 449 drives the first bevel gear 445 to rotate. Since the first bevel gear 445 is engaged with the second bevel gear 448, the second bevel gear 448 drives the telescopic rod 447 to rotate. The telescopic rod 447 drives the sleeve rod 446 to rotate through the limiting protrusion 4401 and the limiting groove in the sleeve rod 446, thereby causing the two screws 442 to rotate synchronously, driving the welding units 443 located on the inner and outer sides of the liquid tank to move to the appropriate welding points at the same time.

[0064] Regarding the welding unit 443, the water level position of the welding gun 4435 can be adjusted by the second hydraulic rod 4433, and the second servo motor 4439 is activated. The second servo motor 4439 drives the second transmission gear 44301 to rotate. The second transmission gear 44301 engages with the second rack 4438, causing the movable housing 4437 to slide within the mounting groove 4436, further adjusting the lateral position of the welding gun 4435 to ensure that the welding gun 4435 is accurately aligned with the welding part.

[0065] Finally, the welding guns 4435 of the welding units 443 located on both sides of the inner and outer sides of the liquid tank are started simultaneously to achieve synchronous welding of the inner and outer sides of the liquid tank.

[0066] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A transport liquid tank assembly welding device, comprising a movable support base (1) and a vertical support rod (2) fixedly mounted on the top thereof, characterized in that: A height adjustment member (3) for lifting and lowering is slidably mounted on the surface of the vertical support rod (2), and a welding mechanism (4) is fixedly mounted on one side of the height adjustment member (3) for welding the liquid tank; The welding mechanism (4) includes a mounting seat (41) fixedly mounted on one side of the height adjustment member (3), two sliding cavities (42) are provided on the surface of the mounting seat (41), and support frames (43) are slidably mounted inside the two sliding cavities (42), and welding position adjustment members (44) are mounted on the surfaces of the support frame (43) and the mounting seat (41) for synchronously welding the inner and outer sides of the liquid tank; The welding position adjustment member (44) includes two first hydraulic rods (441) installed at both ends of the mounting seat (41), the telescopic ends of the two first hydraulic rods (441) are installed inside the sliding cavity (42), and the telescopic ends of the two first hydraulic rods (441) are fixedly connected to one side of the two support frames (43); The interiors of the two support frames (43) are both threadedly connected to screw rods (442), and the surfaces of the screw rods (442) are threadedly connected to welding units (443) for welding the liquid tank. A moving member (5) is installed at the bottom of the movable support seat (1) for laterally moving the movable support seat (1).

2. A transport liquid tank assembly welding device according to claim 1, characterized in that: A transmission cavity (444) is provided at one end of the two support frames (43), one end of the two screw rods (442) passes through the support frame (43) and extends into the transmission cavity (444), a first bevel gear (445) is fixedly installed at one end of the screw rod (442) located inside the transmission cavity (444), a sleeve rod (446) is rotatably installed inside the mounting seat (41) through a bearing, and telescopic rods (447) are slidably installed at both ends of the sleeve rod (446), and one end of the two telescopic rods (447) away from the sleeve rod (446) passes through the support frame (43 ) and extends to the interior of the transmission cavity (444), and a second bevel gear (448) is fixedly installed at one end of the telescopic rod (447) located inside the transmission cavity (444), and the second bevel gear (448) and the first bevel gear (445) are meshedly connected, wherein a third servo motor (449) is fixedly installed at one end of one of the support frames (43), and the output end of the third servo motor (449) passes through the support frame (43) and extends to the interior of the transmission cavity (444), and the output end of the third servo motor (449) is fixedly connected to the first bevel gear (445); Limiting convex strips (4401) are fixedly installed around the surfaces of the two telescopic rods (447), and a limiting groove adapted to the limiting convex strip (4401) is provided inside the sleeve rod (446), and the sleeve rod (446) is slidably connected to the limiting convex strip (4401) through the limiting groove.

3. The transport liquid tank assembly welding device according to claim 1, characterized in that: The welding unit (443) includes two threaded seats (4431) threadedly connected to the surfaces of two screw rods (442), and the tops of the two threaded seats (4431) are fixedly mounted with mounting plates (4432), the bottoms of the mounting plates (4432) are slidably connected to the top of the support frame (43), a second hydraulic rod (4433) is mounted on the top of the mounting plate (4432), and a mounting block (4434) is fixedly mounted on the output end of the second hydraulic rod (4433), and a welding gun (4435) for welding is mounted on the top of the mounting block (4434).

4. The transport liquid tank assembly welding device according to claim 3, characterized in that: A mounting groove (4436) is provided on one side of the top of the mounting block (4434), a movable housing (4437) is slidably mounted inside the mounting groove (4436), and a second rack (4438) is fixedly mounted on the bottom of the inner cavity of the movable housing (4437); A second servo motor (4439) is installed through one side of the installation slot (4436), and a second transmission gear (44301) is fixedly installed at the output end of the second servo motor (4439), and the second transmission gear (44301) is meshingly connected with the second rack (4438).

5. The transport liquid tank assembly welding device according to claim 1, characterized in that: The height adjustment member (3) includes a first rack (31) embedded in one side of the vertical support rod (2); a sliding housing (32) is sleeved on the surface of the vertical support rod (2); and the sliding housing (32) and the vertical support rod (2) are in sliding connection; a first servo motor (33) is installed on one side of the sliding housing (32); an output end of the first servo motor (33) passes through the sliding housing (32) and extends into the interior of the sliding housing (32); a rotating rod (34) is fixedly installed on the output end of the first servo motor (33); a first transmission gear (35) is installed on the surface of the rotating rod (34); one side of the first transmission gear (35) passes through the sliding housing (32) and is meshed with the first rack (31).

6. The transport liquid tank assembly welding device according to claim 5, characterized in that: The vertical support rod (2) is provided with a sliding groove (36) on both the front and rear sides. A sliding block (37) adapted to the sliding groove (36) is installed at the sliding portion between the sliding housing (32) and the vertical support rod (2). The sliding housing (32) is slidably connected to the sliding groove (36) via the sliding block (37).

7. The transport liquid tank assembly welding device according to claim 1, characterized in that: The moving member (5) comprises two electric slide rails (51) mounted on the ground, and electric slide seats (52) are slidably mounted on the surfaces of the two electric slide rails (51), and the tops of the two electric slide seats (52) are fixedly connected to the bottom of the moving support seat (1).

8. The transport liquid tank assembly welding device according to claim 3, characterized in that: The number of the welding units (443) is two groups, and the two groups of welding units (443) are respectively located on the inner and outer sides of the liquid tank to be welded, so as to be used for synchronously welding the inner and outer sides of the liquid tank to be welded.

9. The transport liquid tank assembly welding device according to claim 4, characterized in that: Two brackets are fixedly installed on the top of the movable shell (4437), and the welding gun (4435) is installed between the two brackets. Bolts are installed through the top of the surfaces of the two brackets, and the two brackets are fixedly connected to the welding gun (4435) by bolts, so as to be used for disassembly, assembly and replacement of the welding gun (4435).

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