Full-automatic welding device for cargo boom of tower crane

Abstract

The invention discloses a full-automatic tower crane cargo boom welding device, and particularly relates to the technical field of cargo boom welding equipment.The full-automatic tower crane cargo boom welding device comprises a first lifting machine, a second lifting machine is installed on one side of the first lifting machine, a third lifting machine is arranged on the other side of the first lifting machine, a fourth lifting machine is installed on one side of the third lifting machine, and the fourth lifting machine is arranged on the other side of the third lifting machine; the first lifting machine, the second lifting machine, the third lifting machine and the fourth lifting machine each comprise a winding disc, and an adjusting turnover mechanism is installed on one side of each winding disc. The overturning mechanism is adjusted, the third lifting machine and the fourth lifting machine are started to lift and overturn the bottom support of the other cargo boom, the second lifting machine and the fourth lifting machine are started to lift the cargo boom, the first lifting machine and the third lifting machine are kept immovable, end and side overturning is achieved, the adjusting space is large, and the adjusting effect is good. The heavy arm welding and overturning device is suitable for welding and overturning heavy arms of different types and diameters and is wider in applicability and lower in cost.

Description

Technical Field

[0001] The present invention relates to the technical field of crane arm welding equipment, and more specifically, to a full-automatic tower crane crane arm welding device. Background Art

[0002] The boom of a fully automatic tower crane is called a tower crane. It is a crane that is fully automatically controlled by PLC. Therefore, the boom is installed on the upper part of the tall tower. The rotating boom has a large operating space and is mainly used for vertical and horizontal transportation of materials and installation of building components in house construction. Therefore, in the process of welding the boom, a welding device is needed to flip it at an angle for welding operations.

[0003] The invention patent of patent application announcement number CN109465592A in the prior art discloses a tower crane boom welding device and a working method, including a chassis, the chassis is slidably connected to a mobile platform, the mobile platform is connected to a sliding drive mechanism, the sliding drive mechanism is used to drive the mobile platform to move along the chassis, the mobile platform is provided with a welding device and a dust reduction device, one side of the chassis is provided with a flipping mechanism, the flipping mechanism includes a circular rail mechanism, the circular rail mechanism is connected to the flipping drive mechanism, the flipping drive mechanism is used to drive the rotation of the circular rail mechanism, the circular rail mechanism is provided with a fixing mechanism, the fixing mechanism is used to fix the boom to be welded, the welding device of the invention saves time and labor, improves work efficiency and welding quality, and avoids environmental pollution, but there are certain defects in the use of the welding device, the fixed tooling is turned over during welding, and booms of different diameters cannot be welded, and welding machine devices with different diameters need to be designed to perform welding operations, thereby greatly increasing the production cost and having a poor scope of application. Summary of the invention

[0004] The technical solution of the present invention aims at the technical problem that the existing technical solution is too single, and provides a solution that is significantly different from the existing technology. In order to overcome the above-mentioned defects of the prior art, the present invention provides a fully automatic tower crane boom welding device to solve the problem proposed in the above-mentioned background technology that the fixed tooling is flipped during welding, so that booms of different models and diameters cannot be welded, and welding machine devices matching different models and diameters need to be designed for welding operations, thereby greatly increasing the production cost and having a poor scope of application.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a fully automatic tower crane boom welding device, comprising a first crane, a second crane is installed on one side of the first crane, a third crane is provided on the other side of the first crane, a fourth crane is installed on one side of the third crane, the first crane, the second crane, the third crane, and the fourth crane all include a winding drum, and an adjusting flipping mechanism is installed on one side of the winding drum.

[0006] Preferably, the adjusting and flipping mechanism includes a driving motor arranged on one side of the winding drum, a supporting bottom plate for supporting the driving motor is welded to the bottom end of the driving motor, and a lifting rope is fixed to the inner wall of the winding drum, a roller is installed on the inner wall of the lifting rope at its highest point, a rotating support arm for supporting the roller is sleeved on the outside of the roller, a transmission shaft is installed inside the rotating support arm and near its bottom end, a transmission motor for providing rotational power to the transmission shaft is cocentrically provided at one end of the transmission shaft, the winding drum and the output end of the driving motor are cocentrically fixedly connected, the inner wall of the winding drum is polished and ground, the outside of the transmission shaft is welded and fixed to the rotating support arm, and the transmission shaft and the output end of the transmission motor are fixed by plugging and fixing with a pin.

[0007] Preferably, reinforcement brackets are installed between the first crane and the second crane and between the third crane and the fourth crane, and both ends of the reinforcement brackets are welded and fixed to the second crane and the first crane respectively. Lifting brackets are provided between the third crane and the first crane and between the second crane and the fourth crane, and the lifting brackets are made of stainless steel.

[0008] Preferably, a locking adjustment component is fixed to the bottom end of the lifting rope, and the locking adjustment component includes a concave positioning buckle fixed to the bottom end of the lifting rope, a first transmission screw is installed above the concave positioning buckle and at a position on one side of the lifting rope, and a second transmission screw is provided at a position on the other side of the lifting rope, and a threaded collar bracket is threadedly connected to the outside of the first transmission screw and the second transmission screw, a contraction cylinder is fixed to one end of the threaded collar bracket, and a guide extrusion plate is fixed to the pushing end of the contraction cylinder, and two guide pillars are slidably connected to the inner wall of the guide extrusion plate, one end of the first transmission screw is concentrically connected to the first pulley, and one end of the second transmission screw is concentrically connected to the second pulley, the outside of the second pulley is sleeved with a driving belt for driving the first pulley, and one end of the second pulley is concentrically installed with a linkage motor, the outside of the first transmission screw and the second transmission screw and close to the first pulley are sleeved with collar shaft blocks, and the collar shaft block and the second transmission screw are movably connected through a bearing embedded, and a button is provided at the bottom end of the linkage motor.

[0009] Preferably, a fixed support block is installed at the top of the two threaded ring brackets, and a guide assembly is welded on one side of the fixed support block, and the guide assembly includes a sleeve shaft ring welded on one side of the fixed support block, a support shaft is provided inside the sleeve shaft ring, and an arc guide plate is installed below the sleeve shaft ring, a support block is fixed inside the arc guide plate, and an extrusion spring for rebounding and resetting the arc guide plate is welded on one side of the support block, one end of the extrusion spring is fixed with a fixed inclined support plate for supporting the extrusion spring, a limit ring is provided on the outside of the support shaft and below the arc guide plate, the bottom end of the support shaft passes through the top of the sleeve shaft ring and extends to the bottom of the arc guide plate, and the support shaft and the arc guide plate are movably connected through a bearing.

[0010] Technical effects and advantages of the present invention: 1. The present invention adopts an adjusting flipping mechanism to make the first crane and the second crane lift the bottom bracket of the boom, the third crane and the fourth crane remain stationary, start the transmission motor to drive the transmission shaft to rotate upward, the transmission shaft can drive the rotating support arm to rotate the roller, start the driving motor to drive the winding disk to rotate, the lifting rope can be wound into the winding disk, and the concave positioning buckle drives the bottom bracket of the boom to lift it up, and can flip it sideways. By keeping the first crane and the second crane stationary, start the third crane and the fourth crane to lift and flip the bottom bracket of another boom, start the second crane and the fourth crane to lift the boom, and the first crane and the third crane remain stationary, so as to realize end and side flipping, the adjustment space is large, and it is suitable for welding and flipping of booms of different models and diameters, and the applicability is wider and the cost is lower. 2. The present invention adopts an adjusting flip mechanism to insert the concave positioning buckle into the outer wall position of the bottom bracket of the boom of the fully automatic tower crane, the linkage motor drives the second pulley to rotate, the second pulley drives the driving belt to make the first pulley rotate in the same direction, the two threaded collar brackets drive the contraction cylinder to move, the guide extrusion plate slides to the right along the outer wall of the two guide pillars, the contraction cylinder is started to drive the guide extrusion plate to move upward, and it can be applied to the bottom brackets of the boom of different models and diameters for locking operation, and after locking, it is embedded locking, so even if the guide extrusion plate falls, there is still a concave positioning buckle to limit the support, and the safety is better after lifting; 3. The present invention adopts a guide assembly to make the arc-shaped guide plate contact the lifting rope, the sleeve shaft ring limits the upper surface of the arc-shaped guide plate, and the limit ring limits the lower surface of the arc-shaped guide plate. The arc-shaped guide plate drives the support block to rotate stably, and the extrusion spring completes the compression operation on the fixed inclined support plate, thereby improving the stability of the lifting rope when in use, so that it is not easy to cause the lifting rope to deviate, and the lifting is stable; In summary, through the mutual influence of the above-mentioned multiple effects, the end and side flipping have a large adjustment space, and are suitable for welding flipping of heavy arms of different models and diameters. It has a wider applicability and is suitable for welding flipping of heavy arms of different models and diameters. It improves the stability of the lifting rope during use, so it is not easy to cause the lifting rope to deviate, and the lifting is stable. In summary, the applicability of the welding device can be effectively improved, flexible adjustment can be achieved, multi-directional flip welding can be realized, and better stability can be ensured during the welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The figure is a schematic diagram of the external structure of the fully automatic tower crane boom welding device of the present invention.

[0012] Figure 2 It is a schematic diagram of the rear view structure of the first crane of the present invention.

[0013] Figure 3 It is a schematic diagram of the front structure of the first crane of the present invention.

[0014] Figure 4 It is a schematic diagram of the top view of the structure of the first crane of the present invention.

[0015] Figure 5 It is a schematic structural diagram of the connection between the first hoist and the concave positioning buckle of the present invention.

[0016] Figure 6 For the present invention Figure 5 Enlarged structural diagram at A in the middle.

[0017] Figure 7 It is a schematic diagram of the structure of the guide assembly of the present invention.

[0018] Figure 8 For the present invention Figure 7 Enlarged structural diagram at A in the middle.

[0019] The accompanying drawings are marked as follows: 1. first crane; 2. second crane; 3. third crane; 4. fourth crane; 5. reel; 6. drive motor; 7. lifting rope; 8. roller; 9. rotating arm; 10. transmission shaft; 11. transmission motor; 12. supporting base plate; 13. reinforcement bracket; 14. lifting bracket; 15. concave positioning buckle; 16. first transmission screw; 17. second transmission screw; 18. threaded collar bracket; 19. retraction cylinder; 20. guide extrusion plate; 21. guide pillar; 22. first pulley; 23. second pulley; 24. driving belt; 25. linkage motor; 26. collar shaft block; 27. button; 28. fixed support block; 29. ​​sleeve shaft ring; 30. support shaft; 31. arc guide plate; 32. support block; 33. extrusion spring; 34. fixed inclined support plate; 35. limit ring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0021] As attached Figure 1-8 A fully automatic tower crane boom welding device is shown, and the fully automatic tower crane boom welding device is provided with an adjustment and flipping mechanism, a locking and adjusting component, and a guide component. The arrangement of each mechanism and component can perform side flipping and end flipping of the boom for fully automatic tower crane booms of different models and diameters, and realize welding operations at different angles. The specific structural arrangement of each mechanism and component is as follows: In some embodiments, Figure 1-4 As shown, a second crane 2 is installed on one side of the first crane 1, a third crane 3 is provided on the other side of the first crane 1, a fourth crane 4 is installed on one side of the third crane 3, the first crane 1, the second crane 2, the third crane 3, and the fourth crane 4 all include a winding drum 5, an adjusting flipping mechanism is installed on one side of the winding drum 5, the adjusting flipping mechanism includes a driving motor 6 arranged on one side of the winding drum 5, a supporting bottom plate 12 for supporting the driving motor 6 is welded to the bottom end of the driving motor 6, and a lifting rope 7 is fixed to the inner wall of the winding drum 5, and the inner wall of the lifting rope 7 is A roller 8 is installed at its highest point, a rotating arm 9 for supporting the roller 8 is sleeved on the outside of the roller 8, a transmission shaft 10 is installed inside the rotating arm 9 and near its bottom, a transmission motor 11 for providing rotational power to the transmission shaft 10 is cocentrically arranged at one end of the transmission shaft 10, the winding disk 5 is cocentrically fixedly connected with the output end of the drive motor 6, and the inner wall of the winding disk 5 is polished and ground, the outside of the transmission shaft 10 is welded and fixed to the rotating arm 9, and the transmission shaft 10 is fixed to the output end of the transmission motor 11 by plugging and fixing with a latch; When the flip lifting is performed in the present embodiment, when the side lifting is performed, the concave positioning buckles 15 on the second crane 2 and the first crane 1 can be fixed on the bottom bracket of the boom, and the concave positioning buckles 15 on the fourth crane 4 and the third crane 3 can be buckled on the bottom bracket of another boom, so that the first crane 1 and the second crane 2 can lift the bottom bracket of the boom, and by starting the transmission motor 11 to drive the transmission shaft 10 to rotate upward, the transmission shaft 10 can drive the rotating support arm 9 to rotate the roller 8, so that the horizontal distance of the rotating support arm 9 can be adjusted. When the horizontal distance is adjusted to an appropriate level, the drive motor 6 can be started to drive the winding drum 5 to rotate, and the winding drum 5 drives the lifting rope 7 to move on the outside of the roller 8, so that the lifting rope 7 It can be rolled up into the winding drum 5, and the concave positioning buckle 15 drives the bottom bracket of the boom to be hoisted up, so that it can be flipped sideways, or by keeping the first crane 1 and the second crane 2 stationary, starting the third crane 3 and the fourth crane 4 to lift and flip the other bottom bracket of the boom, thus realizing the side flipping operation, and the boom can be lifted up by starting the second crane 2 and the fourth crane 4, while the first crane 1 and the third crane 3 remain stationary, so that end flipping can be realized, multi-sided flipping can be realized, and the adjustment space is large, which is suitable for welding and flipping of fully automatic tower crane booms of different models and diameters. After flipping to the specified position, the staff can install the bracket with a handheld welding gun to complete the welding operation.

[0022] In some embodiments, Figure 1 As shown, a reinforcing bracket 13 is installed between the first crane 1 and the second crane 2 and between the third crane 3 and the fourth crane 4, and the two ends of the reinforcing bracket 13 are respectively welded and fixed to the second crane 2 and the first crane 1, so that the reinforcing bracket 13 can provide lateral support for the first crane 1 and the second crane 2, and another reinforcing bracket 13 can provide support for the third crane 3 and the fourth crane 4, and a lifting bracket 14 is provided between the third crane 3 and the first crane 1 and between the second crane 2 and the fourth crane 4, and the lifting bracket 14 is made of stainless steel, so that the boom of the fully automatic tower crane can be placed above the lifting bracket 14, wherein the concave positioning buckle 15 is placed on the lifting bracket 14, and the clamping operation can be completed, so that when the boom of the fully automatic tower crane is docked with the concave positioning buckle 15, there is a certain gap at its bottom end, which is convenient for installing the concave positioning buckle 15.

[0023] In some embodiments, Figure 5-6As shown, a locking adjustment component is fixed to the bottom end of the lifting rope 7, and the locking adjustment component includes a concave positioning buckle 15 fixed to the bottom end of the lifting rope 7, a first transmission screw 16 is installed above the concave positioning buckle 15 and at one side of the lifting rope 7, and a second transmission screw 17 is provided at the other side of the lifting rope 7, and a threaded collar bracket 18 is threadedly connected to the outside of the first transmission screw 16 and the second transmission screw 17, and a contraction cylinder 19 is fixed to one end of the threaded collar bracket 18, and a guide extrusion plate 20 is fixed to the pushing end of the contraction cylinder 19, and two sliding connections are connected to the inner wall of the guide extrusion plate 20. A guide pillar 21, one end of the first transmission screw 16 is cocentrically connected to a first pulley 22, and one end of the second transmission screw 17 is cocentrically connected to a second pulley 23, the second pulley 23 is externally sleeved with a driving belt 24 for transmitting the first pulley 22, and one end of the second pulley 23 is cocentrically mounted with a linkage motor 25, the first transmission screw 16 and the second transmission screw 17 are externally sleeved with a collar block 26 near the first pulley 22, and the collar block 26 and the second transmission screw 17 are movably connected by a bearing embedded therein, and a button 27 is provided at the bottom end of the linkage motor 25; When the concave positioning buckle 15 is installed on the bottom bracket of the boom of the fully automatic tower crane in this embodiment, the concave positioning buckle 15 can be inserted into the outer wall position of the bottom bracket of the boom of the fully automatic tower crane, and the guide extrusion plate 20 is located at the lower surface position of the bottom bracket of the boom of the fully automatic tower crane. The linkage motor 25 is started by the button 27, and the linkage motor 25 drives the second pulley 23 to rotate. The second pulley 23 drives the driving belt 24 to make the first pulley 22 rotate in the same direction. The second transmission screw 17 and the first transmission screw 16 both rotate stably outside the collar shaft block 26. The first transmission screw 16 and the second transmission screw 17 are screwed together under the action of the thread. The two threaded collar brackets 18 move to the right, and the threaded collar brackets 18 drive the contraction cylinder 19 to move. The contraction cylinder 19 causes the guide extrusion plate 20 to slide to the right along the outer walls of the two guide pillars 21, so that one side of the guide extrusion plate 20 is completely inserted into the gap on one side of the inner wall of the concave positioning buckle 15. The contraction cylinder 19 is then started to drive the guide extrusion plate 20 to move upward. The guide extrusion plate 20 moves upward along the two guide pillars 21, so that the guide extrusion plate 20 can be squeezed at the lower surface position of the bottom bracket of the full-automatic tower crane boom to achieve the effect of extrusion and fitting. Therefore, it can be suitable for locking operations on the bottom brackets of booms of different models and diameters.

[0024] In some embodiments, Figure 5-8As shown, the top ends of the two threaded collar brackets 18 are both equipped with fixed support blocks 28, and a guide assembly is welded on one side of the fixed support block 28. The guide assembly includes a sleeve shaft ring 29 welded on one side of the fixed support block 28, a support shaft 30 is provided inside the sleeve shaft ring 29, and an arc guide plate 31 is installed below the sleeve shaft ring 29, a support block 32 is fixed inside the arc guide plate 31, and an extrusion spring 33 for rebounding and resetting the arc guide plate 31 is welded on one side of the support block 32, and a fixed inclined support plate 34 for supporting the extrusion spring 33 is fixed on one end of the extrusion spring 33, and a limit ring 35 is provided outside the support shaft 30 and below the arc guide plate 31, the bottom end of the support shaft 30 passes through the top end of the sleeve shaft ring 29 and extends to the position below the arc guide plate 31, and the support shaft 30 and the arc guide plate 31 are movably connected through a bearing; When the present embodiment is used, when the two threaded collar brackets 18 move to the right and the arc guide plate 31 contacts the lifting rope 7, the arc guide plate 31 can be rotated outside the support shaft 30, and the fixed support block 28 supports the sleeve shaft ring 29, the sleeve shaft ring 29 limits the upper surface of the arc guide plate 31, and the limit ring 35 limits the lower surface of the arc guide plate 31, so that the arc guide plate 31 can drive the support block 32 to rotate stably, and the support block 32 squeezes the squeezing spring 33, and the squeezing spring 33 completes the compression operation on the fixed inclined support plate 34, which can ensure that the lifting rope 7 is introduced into the position between the two threaded collar brackets 18 along the position between the two arc guide plates 31. In this way, after locking, the lifting rope 7 is ensured to be stable between the two threaded collar brackets 18, thereby improving the stability of the lifting rope 7 when in use, so it is not easy to cause the lifting rope 7 to deviate out, and the lifting can be stably performed.

[0025] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change; Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other; Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fully automatic tower crane boom welding device, comprising a first crane (1), characterized in that: A second crane (2) is installed on one side of the first crane (1), a third crane (3) is provided on the other side of the first crane (1), a fourth crane (4) is installed on one side of the third crane (3), and the first crane (1), the second crane (2), the third crane (3), and the fourth crane (4) all include a winding drum (5), and an adjusting and turning mechanism is installed on one side of the winding drum (5).

2. The fully automatic tower crane boom welding device according to claim 1 is characterized in that: The adjusting and flipping mechanism comprises a driving motor (6) arranged on one side of the winding drum (5), a supporting bottom plate (12) for supporting the driving motor (6) being welded to the bottom end of the driving motor (6), a lifting rope (7) being fixed to the inner wall of the winding drum (5), a roller (8) being installed on the inner wall of the lifting rope (7) and at its highest point, a rotating arm (9) for supporting the roller (8) being sleeved on the outside of the roller (8), a transmission shaft (10) being installed inside the rotating arm (9) and near its bottom end, and a transmission motor (11) for providing rotational power to the transmission shaft (10) being provided coaxially with one end of the transmission shaft (10).

3. The fully automatic tower crane boom welding device according to claim 2 is characterized in that: The winding disk (5) is fixedly connected to the output end of the driving motor (6) coaxially, and the inner wall of the winding disk (5) is polished and ground.

4. The fully automatic tower crane boom welding device according to claim 2 is characterized in that: The outside of the transmission shaft (10) is fixed to the rotating support arm (9) by welding, and the transmission shaft (10) is fixed to the output end of the transmission motor (11) by plugging with a latch.

5. The fully automatic tower crane boom welding device according to claim 1 is characterized in that: A reinforcement bracket (13) is installed between the first hoist (1) and the second hoist (2) and between the third hoist (3) and the fourth hoist (4), and both ends of the reinforcement bracket (13) are respectively welded and fixed to the second hoist (2) and the first hoist (1).

6. The fully automatic tower crane boom welding device according to claim 1, characterized in that: A lifting bracket (14) is provided between the third crane (3) and the first crane (1), and between the second crane (2) and the fourth crane (4), and the lifting bracket (14) is made of stainless steel.

7. The fully automatic tower crane boom welding device according to claim 2, characterized in that: A locking adjustment component is fixed to the bottom end of the lifting rope (7), and the locking adjustment component includes a concave positioning buckle (15) fixed to the bottom end of the lifting rope (7), a first transmission screw (16) is installed above the concave positioning buckle (15) and at a position on one side of the lifting rope (7), and a second transmission screw (17) is provided at a position on the other side of the lifting rope (7), and a threaded collar bracket (18) is threadedly connected to the outside of the first transmission screw (16) and the second transmission screw (17), and a contraction cylinder ( 19), and a guide extrusion plate (20) is fixedly provided at the pushing end of the contraction cylinder (19), and two guide pillars (21) are slidably connected to the inner wall of the guide extrusion plate (20), one end of the first transmission screw (16) is cocentrically connected to a first belt pulley (22), and one end of the second transmission screw (17) is cocentrically connected to a second belt pulley (23), the outer portion of the second belt pulley (23) is provided with a driving belt (24) for driving the first belt pulley (22), and one end of the second belt pulley (23) is cocentrically mounted with a linkage motor (25).

8. The fully automatic tower crane boom welding device according to claim 7, characterized in that: A collar shaft block (26) is sleeved on the outside of the first transmission screw (16) and the second transmission screw (17) and at a position close to the first pulley (22), and the collar shaft block (26) and the second transmission screw (17) are movably connected via a bearing embedding, and a button (27) is provided at the bottom end of the linkage motor (25).

9. The fully automatic tower crane boom welding device according to claim 7, characterized in that: A fixed support block (28) is installed at the top of each of the two threaded collar brackets (18), and a guide assembly is welded on one side of the fixed support block (28). The guide assembly comprises a sleeve shaft ring (29) welded to one side of the fixed support block (28), a support shaft (30) is provided inside the sleeve shaft ring (29), and an arc guide plate (31) is installed below the sleeve shaft ring (29), a support block (32) is fixed inside the arc guide plate (31), and an extrusion spring (33) for rebounding and resetting the arc guide plate (31) is welded on one side of the support block (32), and a fixed inclined support plate (34) for supporting the extrusion spring (33) is fixed to one end of the extrusion spring (33), and a limit ring (35) is provided outside the support shaft (30) and below the arc guide plate (31).

10. The fully automatic tower crane boom welding device according to claim 9, characterized in that: The bottom end of the support shaft (30) passes through the top end of the sleeve shaft ring (29) and extends to a position below the arc-shaped guide plate (31); the support shaft (30) and the arc-shaped guide plate (31) are movably connected via a bearing.

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