A welding apparatus for a tower crane jib

Abstract

The application relates to the technical field of welding equipment, and discloses welding equipment for a tower crane jib, which comprises a base and a moving assembly above the base, the welding equipment is controlled to operate by a controller, a supporting seat is fixed to one side of the base away from the moving assembly, and a truss is slidably connected to the outside of the supporting seat. The welding equipment for the tower crane jib releases the combined state of the driving half ring and the driven half ring, hoists the jib steel to the top of the adjusting seat in the driving half ring, aligns the driving half ring and the driven half ring, controls the return stroke of the electric telescopic rod, drives the driving half ring and the driven half ring to be closed, combines to form a complete ring, and drives the welding gun to weld the jib steel by the moving assembly. During the welding process, the jib steel is turned over by the motor driving the gear plate, so that each welding position of the jib steel is located below the welding gun, thereby avoiding the operation of overhead welding and avoiding the falling of the molten pool.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding equipment, in particular to a welding equipment for a tower crane jib. BACKGROUND

[0002] The jib, commonly known as the boom or the lifting arm, is a bidirectional compression bending metal structural member supporting the hoisting rope, the material taking device or the luffing trolley. The jib is widely used in various types of crane equipment, such as truck cranes, tire cranes, tower cranes, etc., and plays an important role in construction sites, ports, freight yards, etc., for lifting and transporting heavy objects.

[0003] When the jib is applied to a tower crane, the jib is usually made of sectioned steel and then welded to the tower crane. In the prior art, the welding of the jib is generally performed by using automatic welding equipment, i.e., the two steel sections to be welded are placed on a welding platform, and the movement of the welding gun is controlled by a microcomputer to perform welding.

[0004] However, when the jib steel is welded by using such automatic welding equipment, the position of the welding gun changes according to the position of the welding site. When the welding gun is above the welding site, the molten pool formed by welding is filled into the weld, thereby completing the welding. When the welding gun is below the welding site, the molten pool will drop, resulting in insufficient filling of the weld, and thus insufficient welding. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a welding equipment for a tower crane jib, which solves the problems raised in the background art.

[0006] The present application provides the following technical solution: a welding equipment for a tower crane jib, comprising a base and a moving assembly above the base, the moving assembly being capable of driving the welding gun connected below to move vertically and in the length direction of the base, the welding equipment being controlled and operated by a controller, the side of the base away from the moving assembly being fixed with a support seat, and the outside of the support seat being slidably connected with a truss;

[0007] The top of the truss on both sides is fixed with a support column, the top of the support column is fixed with a concave bracket, one side of the inside of the concave bracket is fixed with a support, the top of the support is fixed with a motor, the outside of the output shaft of the motor is fixed with a gear disc, the inner wall of the concave bracket on both sides is fixed with a limiting block, and the inside of the concave bracket is provided with a lifting assembly;

[0008] The lifting assembly comprises a driving half ring, a driving ring groove is formed on the surface of the driving half ring, the driving ring groove is in sliding connection with a limiting block, a tooth is fixed on the surface of the side of the driving half ring away from the driving ring groove, the tooth is in meshing connection with a gear plate, an adjusting seat is in threaded connection with the inside of the driving half ring, and a disc is arranged on the top of the adjusting seat.

[0009] The top of the adjusting seat is placed with a lifting arm section steel.

[0010] Optionally, the inside of the two ends of the driving half ring is provided with a placing cavity, the inside of one of the placing cavities is fixed with an electric telescopic rod, the top of the output shaft of the electric telescopic rod is fixed with a limiting disc, the outside of the limiting disc is rotatably connected with a driven half ring, the inside of the end of the driven half ring away from the electric telescopic rod is provided with a clamping groove, and the inside of the clamping groove is fixed with a magnetic block.

[0011] Optionally, the inside of the placing cavity near the clamping groove is fixed with a first spring, the outside of the one end of the first spring is fixed with a magnetic tube, the magnetic tube and the magnetic block are opposite in magnetism, and the magnetic tube is in sliding connection with the placing cavity and the clamping groove.

[0012] Optionally, the shape of the driven half ring is equal to that of the driving half ring, and the driven half ring is oppositely arranged with the driving half ring, a driven ring groove is formed on the surface of the driven half ring, a tooth is fixed on the surface of the side of the driven half ring away from the driven ring groove, the driven ring groove is in sliding connection with a limiting block, and an adjusting seat is in threaded connection with the inside of the driven half ring.

[0013] Optionally, the inside of the supporting seat is fixed with an air cylinder, and the top of the output shaft of the air cylinder is fixed with a limiting seat.

[0014] Optionally, the top of the limiting seat is provided with a limiting groove, the inside of the limiting groove is rotatably connected with a bidirectional screw rod, and the one end of the bidirectional screw rod penetrates through the limiting seat and is provided with a handle outside the end.

[0015] Optionally, the surfaces of the two sides of the bidirectional screw rod are in threaded connection with adjusting blocks, the adjusting blocks are in sliding connection with the limiting groove, and the two sides of the top end of the adjusting blocks are fixed with positioning frames.

[0016] Optionally, the inside of the positioning frame is provided with an adjusting groove, the inside of the adjusting groove near the handle is slidably connected with a zirconia ceramic frame, the one end of the zirconia ceramic frame near the lifting arm section steel is fixed with a magnetic sheet, the top of the zirconia ceramic frame is provided with a sliding groove, the inside of the sliding groove is slidably connected with a sliding block, the top of the sliding block is fixed with a second spring, the one end of the second spring is fixed with the top plate of the adjusting groove, the inside of the adjusting groove on the side without the zirconia ceramic frame is fixed with a magnetic plate, and the magnetic plate and the magnetic sheet are opposite in magnetism.

[0017] Compared with the prior art, the present application has the following beneficial effects:

[0018] 1. The welding equipment for the tower crane jib, when placing the jib section, first release the combined state of the active half ring and the driven half ring, so that the active half ring is in an open state, then through the hoisting structure, hoist the jib section to the inside of the active half ring and place it on the top of the adjusting seat in the active half ring, then after aligning the active half ring and the driven half ring, control the electric telescopic rod to return, then drive the active half ring and the driven half ring to close, combine to form a complete ring, then drive the welding gun through the moving assembly to weld the jib section, during the welding process, drive the jib section to overturn through the motor and the gear plate, then make each welding position of the jib section below the welding gun, thereby avoiding the operation of overhead welding and avoiding the falling of the molten pool.

[0019] 2. The welding equipment for the tower crane jib, when the jib section enters the first working state, the contact ends of the two jib sections are in an outward convex angle state, control the cylinder to drive the limiting seat to drive the positioning frame to lift up, the limiting seat supports the jib section after contacting the jib section, at the same time, pull the zirconia ceramic frame, so that the zirconia ceramic frame moves to the surface of the jib section, then push the zirconia ceramic frame, so that the zirconia ceramic frame straddles the surfaces of the two jib sections, under the action of the spring, the bottom of the zirconia ceramic frame is attached to the two sides of the outward convex angle of the jib section, and is adsorbed by the magnetic plate to the magnetic sheet, then the limiting of the zirconia ceramic frame is completed, the molten pool generated during welding is limited by the two zirconia ceramic frames, then the falling of the molten pool is avoided, and the quality of the jib part welding is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the initial working state diagram of the present application;

[0021] Figure 2 It is the first working state diagram of the present application;

[0022] Figure 3 It is the second working state diagram of the present application;

[0023] Figure 4 It is the third working state diagram of the present application;

[0024] Figure 5 It is the structure diagram of the truss and the strut of the present application;

[0025] Figure 6 It is the position relation diagram of the active half ring, the electric telescopic rod and the driven half ring of the present application;

[0026] Figure 7 It is the structure sectional view of the active half ring and the driven half ring of the present application;

[0027] Figure 8 Structure diagram of the support seat and the air cylinder of the application;

[0028] Figure 9 Structure diagram of the positioning frame of the application;

[0029] Figure 10 Front view of the structure of the positioning frame of the application;

[0030] Figure 11 Structure diagram of the limiting round plate of the application;

[0031] Figure 12 Structure diagram of the adjusting seat of the application.

[0032] In the figure: 1, base; 11, support seat; 2, truss; 3, support column; 31, concave bracket; 32, motor; 33, gear plate; 34, limiting block; 4, driving half ring; 41, driving ring groove; 42, tooth; 43, adjusting seat; 44, placing cavity; 45, electric telescopic rod; 451, limiting round plate; 46, driven half ring; 461, driven ring groove; 47, clamping groove; 471, magnetic block; 48, first spring; 49, magnetic tube; 5, lifting arm-shaped steel; 6, air cylinder; 7, limiting seat; 71, limiting groove; 72, bidirectional screw; 73, adjusting block; 74, positioning frame; 8, adjusting groove; 81, zirconia ceramic bracket; 811, magnetic sheet; 82, sliding groove; 83, sliding block; 84, second spring; 85, magnetic plate. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0034] Embodiment one:

[0035] Please refer to Figures 1-12 A welding device for a tower crane jib, comprising a base 1 and a moving assembly above the base 1, the moving assembly can drive the welding gun connected below to move vertically and in the length direction of the base 1, the welding device is controlled to run by a controller, and the side, away from the moving assembly, of the base 1 is fixed with a support seat 11, and the outside of the support seat 11 is slidingly connected with a truss 2.

[0036] The top of the truss 2 is fixed with a support column 3, the top of the support column 3 is fixed with a concave frame 31, one side of the inside of the concave frame 31 is fixed with a support, and the top of the support is fixed with a motor 32, the outside of the output shaft of the motor 32 is fixed with a gear disc 33, the inner wall of the two sides of the concave frame 31 is fixed with a limiting block 34, and the inside of the concave frame 31 is provided with a lifting assembly for lifting the jib component;

[0037] The lifting assembly comprises a driving half ring 4, a driving ring groove 41 is formed in the surface of the driving half ring 4, the driving ring groove 41 is in sliding connection with the limiting block 34, the surface of the side, away from the driving ring groove 41, of the driving half ring 4 is fixed with a tooth 42, the tooth 42 is in meshing connection with the gear disc 33, the inside of the driving half ring 4 is in threaded connection with an adjusting seat 43, the top of the adjusting seat 43 is provided with a disc, and the top of the adjusting seat 43 is placed with a jib steel 5;

[0038] The inside of the two ends of the driving half ring 4 is provided with a placing cavity 44, the inside of one of the placing cavities 44 is fixed with an electric telescopic rod 45, the top of the output shaft of the electric telescopic rod 45 is fixed with a limiting disc 451, the outside of the limiting disc 451 is rotatably connected with a driven half ring 46, the inside of the end, away from the electric telescopic rod 45, of the driven half ring 46 is provided with a clamping groove 47, and the inside of the clamping groove 47 is fixed with a magnetic block 471;

[0039] The placing cavity 44, close to the clamping groove 47, of the jib steel 5 is fixed with a first spring 48 in the inside, the outside of one end of the first spring 48 is fixed with a magnetic tube 49, the magnetic property of the magnetic tube 49 is opposite to that of the magnetic block 471, the magnetic tube 49 is in sliding connection with the placing cavity 44 and the clamping groove 47, the shape of the driven half ring 46 is equal to that of the driving half ring 4, and the driven half ring 46 is oppositely arranged, the surface of the driven half ring 46 is provided with a driven ring groove 461, the surface of the side, away from the driven ring groove 461, of the driven half ring 46 is fixed with a tooth 42, and the driven ring groove 461 is in sliding connection with the limiting block 34;

[0040] In the specific operation process, first, the electric telescopic rod 45 is started through the controller, so that the electric telescopic rod 45 drives the limiting disc 451 to be lifted, and then the limiting disc 451 drives the driven half ring 46 to be lifted, so that the combined state of the driving half ring 4 and the driven half ring 46 is released, then the driven half ring 46 is rotated, so that the driving half ring 4 becomes an open state, when the two driving half rings 4 are in the open state, the two jib steels 5 can be respectively hoisted to the inside of the two driving half rings 4, and the jib steels 5 are placed on the top of the adjusting seat 43 in the driving half ring 4;

[0041] When the hoisting arm section steel 5 is hoisted and the driven half ring 46 is rotated to re-align with the driving half ring 4, the controller controls the electric telescopic rod 45 to return, so that the electric telescopic rod 45 drives the limiting circular plate 451 to return, and then the driven half ring 46 is driven to return, so that the driven half ring 46 and the driving half ring 4 are combined into a complete ring, and then the controller starts the magnetic block 471 to generate magnetic force after energization, and the magnetic tube 49 is adsorbed into the inside of the clamping groove 47, so that the driven half ring 46 and the driving half ring 4 are locked;

[0042] Further, since the driving half ring 4 and the driven half ring 46 are oppositely arranged, the adjusting seat 43 in the driving half ring 4 and the driven half ring 46 is oppositely arranged, when the driving half ring 4 and the driven half ring 46 are combined, the adjusting seat 43 in the driven half ring 46 is rotated to gradually approach the hoisting arm section steel 5, until the adjusting seat 43 is in contact with the hoisting arm section steel 5, and then the adjusting seat 43 is stopped, at this time, the positions of the two hoisting arm section steels 5 are adjusted to align the contact ends of the two hoisting arm section steels 5, and then the adjusting seat 43 is continuously rotated, so that the adjusting seat 43 in the driving half ring 4 and the driven half ring 46 clamps the hoisting arm section steel 5, and then the hoisting arm section steel 5 is clamped and fixed, and at the same time, the contact ends of the two hoisting arm section steels 5 are locked, thereby improving the precision of subsequent welding of the two hoisting arm section steels 5;

[0043] Specifically, with reference to Figure 1 When the hoisting arm section steel 5 is locked, the present application enters the initial working state, and then the controller controls the movement assembly to move the welding gun, at this time, the surfaces of the two hoisting arm section steels 5 near the side of the welding gun are in a horizontal state, and the surfaces are welded as the welding gun moves, so that the molten pool generated by welding is also in a horizontal state, that is, the molten pool is in a stable state, and as the welding gun moves, the molten pool moves with the welding gun, and then the welding of the front surface of the hoisting arm section steel 5 is completed;

[0044] Further, when the welding of the two hoisting arm section steels 5 in the initial working state is completed, the controller starts the motor 32 in the two concave frames 31, the gear plate 33 is driven to rotate by the motor 32, and then the gear teeth 42 are driven to rotate by the gear plate 33, since the surfaces of the driving half ring 4 and the driven half ring 46 are provided with gear teeth 42, and at this time, the driving half ring 4 and the driven half ring 46 are combined into a complete ring, so that the gear teeth 42 on the surfaces of the driving half ring 4 and the driven half ring 46 are also combined into a ring shape and fit the gear plate 33;

[0045] Therefore, when the gear plate 33 rotates, the gear plate 33 can drive the circular ring composed of the driving half ring 4 and the driven half ring 46 to rotate through the gear teeth 42, when the circular ring composed of the driving half ring 4 and the driven half ring 46 rotates, it drives the two adjusting seats 43 inside it to rotate, in turn, the adjusting seat 43 drives the lifting arm shaped steel 5 to rotate, thereby making both the lifting arm shaped steels 5 be able to overturn, that is, the motor 32 drives the adjusting seat 43 to drive the lifting arm shaped steel 5 to overturn, and in the overturning process, the welding position of the two lifting arm shaped steels 5 is still in the state of close contact and does not change, thereby improving the accuracy of subsequent welding of the two lifting arm shaped steels 5.

[0046] With reference to Figure 2 When the driving half ring 4 and the driven half ring 46 are overturned by ninety degrees counterclockwise, the two lifting arm shaped steels 5 are also overturned by ninety degrees counterclockwise, at this time, the application enters the first working state, then the welding gun is continuously moved by the moving assembly, at this time, the side of the two lifting arm shaped steels 5 close to the welding gun is in the state of outward convex angle, and the welding gun welds the welding position of the two lifting arm shaped steels 5 in the moving process, and after the welding is completed, the motor 32 is continuously controlled to drive the gear plate 33 to rotate, the two lifting arm shaped steels 5 are continuously overturned by ninety degrees counterclockwise through the gear plate 33, so that the application enters the second working state, and after the welding is completed in the second working state, the two lifting arm shaped steels 5 are overturned by ninety degrees counterclockwise through the gear plate 33, so that the application enters the third working state.

[0047] With reference to Figure 4 In the third working state, the side of the two lifting arm shaped steels 5 close to the welding gun is in the state of inward concave angle, then the welding gun welds the two lifting arm shaped steels 5 in the third working state, and thus all the welding interfaces of the lifting arm shaped steel 5 are completed.

[0048] It should be noted that in many conventional welding equipment, only two lifting arm shaped steels 5 in straight line butt joint can be welded, and after the welding is completed, they also present straight strip shape, and in the application, the welding surface of the lifting arm shaped steel 5 becomes inclined to the length direction of the lifting arm shaped steel 5, that is, the two lifting arm shaped steels 5 in the application have a certain angle after butt joint and welding, therefore, compared with the conventional welding equipment, the application is more widely used, and the welding formed material also meets the demand of the lifting arm, and in the welding process, the position of the welding gun is always above the welding position, avoiding the drop of the molten pool caused by overhead welding, and improving the welding quality.

[0049] And the adjusting seat is composed of a screw rod and a disc, the contact end of the screw rod and the disc in the adjusting seat can be hexagonally arranged, facilitating the auxiliary rotation of the welding personnel using a wrench.

[0050] Example two:

[0051] The inside of the support base 11 is fixed with the air cylinder 6, the top of the output shaft of the air cylinder 6 is fixed with the limiting seat 7, the top of the limiting seat 7 is provided with the limiting slot 71, the inside of the limiting slot 71 is rotatably connected with the bidirectional screw rod 72, one end of the bidirectional screw rod 72 penetrates through the limiting seat 7, and the outside of the end is provided with the handle, the surfaces of the two sides of the bidirectional screw rod 72 are screw-connected with the adjusting block 73, the adjusting block 73 is slidably connected with the limiting slot 71, and the two sides of the top of the adjusting block 73 are fixed with the positioning frame 74;

[0052] The inside of the positioning frame 74 is provided with the adjusting slot 8, the inside of the adjusting slot 8 close to the handle is slidably connected with the zirconia ceramic frame 81, one end of the zirconia ceramic frame 81 close to the lifting arm shaped steel 5 is fixed with the magnetic sheet 811, the top of the zirconia ceramic frame 81 is provided with the sliding slot 82, the inside of the sliding slot 82 is slidably connected with the sliding block 83, the top of the sliding block 83 is fixed with the second spring 84, one end of the second spring 84 is fixed with the top plate of the adjusting slot 8, the inside of the adjusting slot 8 on the side without the zirconia ceramic frame 81 is fixed with the magnetic plate 85, and the magnetic plate 85 is opposite to the magnetic sheet 811 in magnetic property;

[0053] On the basis of the first embodiment, when the lifting arm shaped steel 5 is locked in the process of the application, that is, before entering the initial working state, the air cylinder 6 is started through the controller, so that the air cylinder 6 drives the limiting seat 7 to lift up, so that the limiting seat 7 drives the bidirectional screw rod 72 and the adjusting block 73 to lift up, so that the adjusting block 73 drives the positioning frame 74 to lift up, until the limiting seat 7 contacts with the two lifting arm shaped steels 5, and then the limiting seat 7 further supports the contact ends of the two lifting arm shaped steels 5, so that the surface of the lifting arm shaped steel 5 is clamped by the adjusting seat 43 and supported by the limiting seat 7, thereby improving the stability of the lifting arm shaped steel 5 as a whole, and further improving the stability of the lifting arm shaped steel 5 when welding in the inclined state;

[0054] Meanwhile, after the limiting seat 7 contacts with the lifting arm shaped steel 5, the bidirectional screw rod 72 is rotated, so that the bidirectional screw rod 72 drives the adjusting block 73 and the positioning frame 74 to move, in the initial working state, one end of the two lifting arm shaped steels 5 close to the handle of the bidirectional screw rod 72 is in an outward convex angle state, as the bidirectional screw rod 72 drives the adjusting block 73 and the positioning frame 74 to move along the length direction of the limiting seat 7, the positioning frame 74 gradually approaches the lifting arm shaped steel 5, until the positioning frame 74 contacts with the lifting arm shaped steel 5, at this time, the two lifting arm shaped steels 5 are limited by the positioning frame 74, thereby improving the accuracy of the alignment of the two lifting arm shaped steels 5 and the accuracy of the later welding, after the contact ends of the two lifting arm shaped steels 5 are aligned, the adjusting seat 43 can be continuously rotated in the steps of the first embodiment, to complete the locking of the lifting arm shaped steel 5;

[0055] Further, after the locking of the crane arm profile steel 5 is completed and the initial working state is entered, the welding of the contact end of the crane arm profile steel 5 is started, and after the welding is completed, the crane arm profile steel 5 is driven to rotate counterclockwise by 90 degrees by the motor 32 driving the gear disc 33, so that the application enters the first working state. In the first working state, the side of the two crane arm profile steels 5 close to the welding gun is in an inclined state, that is, the two crane arm profile steels 5 are in an inclined state, and at this time the adjusting seat 43 is located on both sides of the crane arm profile steel 5.

[0056] Then continue to control the cylinder 6 to eject, so that the cylinder 6 continues to drive the limiting seat 7 to lift, so that the limiting seat 7 drives the bidirectional screw 72 and the adjusting block 73 to lift again, so that the limiting seat 7 contacts the two crane arm profile steels 5 again and supports the two crane arm profile steels 5 again, thereby further improving the stability of the crane arm profile steel 5 in the inclined state, and further improving the stability of the crane arm profile steel 5 during welding in the inclined state.

[0057] Further, after the limiting seat 7 supports the crane arm profile steel 5, the bidirectional screw 72 is rotated again, the adjusting block 73 and the positioning frame 74 are driven by the bidirectional screw 72 to move towards the crane arm profile steel 5 until the distance between the magnetic sheet 811 and the magnetic plate 85 is less than the length of the zirconia ceramic frame 81, then the zirconia ceramic frame 81 is lifted, so that the zirconia ceramic frame 81 drives the sliding block 83 to displace in the vertical direction of the adjusting groove 8 in the inside of the adjusting groove 8, so that the zirconia ceramic frame 81 moves above the inclined surface of the two crane arm profile steels 5, and then the zirconia ceramic frame 81 is pushed towards the crane arm profile steel 5.

[0058] During the pushing of the zirconia ceramic frame 81, the second spring 84 drives the sliding block 83 to reset, the sliding block 83 drives the zirconia ceramic frame 81 to reset, and the zirconia ceramic frame 81 is blocked by the crane arm profile steel 5, so that the zirconia ceramic frame 81 is attached to the surface of the crane arm profile steel 5 until the zirconia ceramic frame 81 drives the magnetic sheet 811 to abut against and be attracted by the magnetic plate 85, thereby completing the clamping of the zirconia ceramic frame 81. Since the zirconia ceramic frame 81 is attached to the inclined surface of the crane arm profile steel 5, when the welding gun welds, the molten pool is intercepted by the zirconia ceramic frame 81, thereby avoiding the dripping of the molten pool in the first working state, thereby improving the welding quality, and the magnetic sheet 811 and the magnetic plate 85 are also located in the inside of the positioning frame 74, avoiding the influence of high temperature on magnetism.

[0059] Example Three

[0060] Reference Figure 4On the basis of embodiment one and embodiment two, before the present application enters the third working state, first, the controller controls the cylinder 6 to return, so that the cylinder 6 drives the limiting seat 7 to return, so that the crane arm section steel 5 has enough space for overturning, at this time, the two crane arm section steels 5 on the side close to the welding gun are in a concave angle state, that is, the two crane arm section steels 5 on the side close to the limiting groove 71 are in an inclined state;

[0061] At this time, the controller controls the cylinder 6 to eject, so that the cylinder 6 drives the limiting seat 7 to eject, and the limiting seat 7 gradually approaches the two crane arm section steels 5 in the ejecting process, until the two crane arm section steels 5 are in contact with the limiting seat 7, when the limiting seat 7 is in contact with the two crane arm section steels 5, the contact end of the two crane arm section steels 5 is clamped into the inside of the limiting groove 71, and the surface of the two crane arm section steels 5 is in abutment with the top of the limiting seat 7, thereby the limiting seat 7 can assist in supporting the two crane arm section steels 5 in the third working state, and further improve the stability of the crane arm section steel 5 as a whole and the stability of subsequent welding;

[0062] When the third working state is completed, the electric telescopic rod 45 can be controlled to start, so that the electric telescopic rod 45 drives the limiting circular plate 451 to lift the driven half ring 46 again, and the power supply to the magnetic block 471 is removed, so that the magnetic tube 49 is reset under the action of the first spring 48, loses the locking of the driven half ring 46, and then the driven half ring 46 can be rotated, so that the driving half ring 4 restores to the open state, and then the new crane arm section steel 5 can be replaced for welding.

[0063] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A welding device for a tower crane jib, comprising a base (1) and a moving assembly above the base (1), the moving assembly being able to drive the below connected welding torch to move vertically and in the length direction of the base (1), the welding device being controlled and operated by a controller, characterized in that: The base (1) is fixed with a support seat (11) away from the moving assembly, and the outer part of the support seat (11) is slidingly connected with a truss (2); ​ The top of the truss (2) is fixed with a support column (3) on both sides, and the top of the support column (3) is fixed with a concave frame (31), one side of the inside of the concave frame (31) is fixed with a support, and the top of the support is fixed with a motor (32), the outer part of the output shaft of the motor (32) is fixed with a gear disc (33), the inner wall of the concave frame (31) on both sides is fixed with a limiting block (34), and the inside of the concave frame (31) is provided with a lifting assembly, which is used for lifting the jib component; The lifting assembly comprises a driving half ring (4), a driving ring groove (41) is formed in the surface of the driving half ring (4), the driving ring groove (41) is slidingly connected with the limiting block (34), the surface of the side, away from the driving ring groove (41), of the driving half ring (4) is fixed with a tooth (42), the tooth (42) is engaged with the gear disc (33), the inside of the driving half ring (4) is threadedly connected with an adjusting seat (43), and the top of the adjusting seat (43) is provided with a disc; The top of the adjusting seat (43) is placed with a jib steel (5); the inside of the support seat (11) is fixed with a gas cylinder (6), the top of the output shaft of the gas cylinder (6) is fixed with a limiting seat (7); the top of the limiting seat (7) is formed with a limiting groove (71), and the inside of the limiting groove (71) is rotatably connected with a bidirectional screw rod (72); the surfaces of the two sides of the bidirectional screw rod (72) are threadedly connected with adjusting blocks (73), and the two sides of the top end of the adjusting block (73) are fixed with positioning frames (74); one end of the bidirectional screw rod (72) penetrates through the limiting seat (7), and the outer part of the end is provided with a handle; the inside of the positioning frame (74) is formed with an adjusting groove (8), the inside of the adjusting groove (8) close to the handle is slidingly connected with a zirconia ceramic frame (81), one end of the zirconia ceramic frame (81) close to the jib steel (5) is fixed with a magnetic sheet (811), the top of the zirconia ceramic frame (81) is formed with a sliding groove (82), the inside of the sliding groove (82) is slidingly connected with a sliding block (83), the top of the sliding block (83) is fixed with a second spring (84), one end of the second spring (84) is fixed with the top plate of the adjusting groove (8), the inside of the adjusting groove (8) on the side, where the zirconia ceramic frame (81) is not arranged, is fixed with a magnetic plate (85), and the magnetic plate (85) is opposite to the magnetic sheet (811) in magnetic property.

2. A welding apparatus for a tower crane jib according to claim 1, characterised in that: The inside of the two ends of the driving half ring (4) is formed with a placing cavity (44), the inside of one of the placing cavities (44) is fixed with an electric telescopic rod (45), the top of the output shaft of the electric telescopic rod (45) is fixed with a limiting disc (451), the outer part of the limiting disc (451) is rotatably connected with a driven half ring (46), the inside of the end, away from the electric telescopic rod (45), of the driven half ring (46) is formed with a clamping groove (47), and the inside of the clamping groove (47) is fixed with a magnetic block (471).

3. A welding apparatus for a tower crane jib according to claim 2, characterised in that: The placing cavity (44) near the card slot (47) has a first spring (48) fixed inside, and the outer end of the first spring (48) has a magnetic tube (49) fixed, the magnetic tube (49) and the magnetic block (471) are opposite in magnetism, and the magnetic tube (49) is in sliding connection with the placing cavity (44) and the card slot (47).

4. A welding apparatus for a tower crane jib according to claim 3, characterised in that: The driven half ring (46) is equal in shape to the driving half ring (4) and is oppositely arranged, the surface of the driven half ring (46) is provided with a driven ring groove (461), the surface of the driven half ring (46) away from the driven ring groove (461) is fixed with a tooth (42), the driven ring groove (461) is in sliding connection with the limiting block (34), and the inside of the driven half ring (46) is in threaded connection with an adjusting seat (43).

5. A welding apparatus for a tower crane jib according to claim 1, characterised in that: The adjusting block (73) is in sliding connection with the limiting groove (71).

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