Auxiliary welding device for cargo boom of tower crane

Abstract

The invention discloses a tower crane cargo boom welding auxiliary device, and relates to the technical field of hoisting machinery manufacturing, the tower crane cargo boom welding auxiliary device comprises a movable base, a mounting plate is fixedly mounted on the surface of the movable base, a fixing frame is fixedly mounted on the surface, away from the movable base, of the mounting plate, and a cargo boom is fixedly mounted on the top of the fixing frame; the crane further comprises a supporting device, the supporting device comprises a carrying pipe, a sliding rod, a connecting frame, a hollow pipe, supporting legs, a first spring and a holding rod, the carrying pipe fixedly penetrates through the surface of the fixing frame, the sliding rod is slidably installed on the inner wall of the carrying pipe, and the connecting frame is fixedly installed on the face, close to the crane boom, of the sliding rod. The hollow pipe is fixedly mounted at the bottom of the connecting frame, and the position of the connecting frame for supporting the cargo boom can be flexibly changed by quickly adjusting the position of the connecting frame, so that the stability of the cargo boom is enhanced in the welding process.

Description

Technical Field

[0001] The invention relates to the technical field of hoisting machinery manufacturing, in particular to a tower crane boom welding auxiliary device. Background Art

[0002] The tower crane boom welding auxiliary device consists of a supporting device, a positioning device and a welding platform.

[0003] The patent with patent announcement number CN212122230U relates to a tower crane boom welding auxiliary device, including a boom, an active seat and a driven seat. The boom is installed on the active seat and the driven seat. Several fixed plates are welded and fixed on the boom. The active seat and the driven seat are both provided with clamping members welded thereon for clamping the fixed plates. The first turntable is fixedly connected to the output end of the rotating motor through a first connecting shaft, and the first turntable is fixedly connected to the clamping member so that the rotating motor drives the first turntable to drive the boom to rotate, and the second turntable is fixedly connected to the clamping member so that the boom drives the second turntable to rotate. The tower crane boom welding auxiliary device uses the clamping member to fix the boom, and then uses two rotating components to drive the boom to rotate. It can also use two lifting components to drive the boom to adjust its position up and down, making it more convenient to weld the boom and improving the welding quality.

[0004] The above patent has the effect of improving welding quality. The crane arm can be rotated by two rotating components, and the crane arm can be adjusted up and down by two lifting components, making the crane arm welding more convenient. However, in actual operation, the two sides of the crane arm are usually fixedly supported. This support method causes the center position of the crane arm to lack sufficient supporting force. Therefore, during the welding process, the center position of the crane arm is prone to shaking or offset, and this shaking will have an adverse effect on the welding quality. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a tower crane boom welding auxiliary device, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a tower crane boom welding auxiliary device, comprising a mobile base, a mounting plate fixedly mounted on the surface of the mobile base, a fixed frame fixedly mounted on the side of the mounting plate away from the mobile base, a boom fixedly mounted on the top of the fixed frame, and a supporting device; wherein the supporting device comprises a carrying tube, a sliding rod, a connecting frame, a hollow tube, a supporting foot, a No. 1 spring and a gripping rod, the supporting foot squeezes the No. 1 spring during movement, the No. 1 spring is squeezed and deformed, the carrying tube is fixedly passed through the surface of the fixed frame, the sliding The rod is slidably installed on the inner wall of the carrying tube, the connecting frame is fixedly installed on the side of the sliding rod close to the lifting arm, the hollow tube is fixedly installed on the bottom of the connecting frame, the supporting foot slides through the bottom of the hollow tube, the No. 1 spring is arranged between the supporting foot and the connecting frame, the gripping rod is fixedly installed on the circumferential surface of the supporting foot, the gripping rod slides through the circumferential surface of the hollow tube, a sliding groove is provided on the side of the connecting frame close to the lifting arm, the sliding groove is in contact with the bottom of the lifting arm, the supporting foot provides support for the lifting arm through the connecting frame, so that the connecting frame can apply an upward supporting force to the bottom of the lifting arm during welding.

[0007] According to the above technical solution, the top of the carrying tube slides through the limit rod, a No. 2 spring is arranged between the limit rod and the carrying tube, and a plurality of circular grooves are opened on the circumferential surface of the sliding rod. The bottom of the limit rod contacts the inner wall of the circular groove, and the contact surface of the limit rod and the circular groove is separated, so that the limit imposed on the sliding rod by the limit rod is released.

[0008] According to the above technical solution, a support frame is fixedly installed on a side of the fixed frame close to the sliding rod, and a circular hole is opened on the support frame. The circumferential surface of the sliding rod contacts the inner wall of the circular hole. When the sliding rod moves, the fixed frame provides support for the sliding rod to ensure that the sliding rod moves more smoothly.

[0009] According to the above technical solution, a locking device for locking the gripping rod is provided on the hollow tube, and a protective device for improving safety is provided on the locking device; the locking device includes a hollow plate, a lifting frame, a door-shaped frame, a sliding block, a telescopic block, a No. 1 spring piece, a rotating rod, a stop block and a round block, the telescopic block squeezes the No. 1 spring piece during movement, and the No. 1 spring piece is deformed by the squeezing, the hollow plate is fixedly mounted on the circumferential surface of the hollow tube, the lifting frame slides through the inner and outer walls of the hollow plate, the door-shaped frame is fixedly mounted on the side of the hollow plate away from the hollow tube, and the sliding block is slidably mounted on the inner wall of the door-shaped frame. The telescopic block slides through a side of the sliding block close to the hollow plate, the No. 1 spring piece is arranged between the telescopic block and the sliding block, the rotating rod is rotatably mounted on a side of the sliding block away from the hollow plate, the stop block is fixedly mounted on the circumferential surface of the rotating rod, and the round block is fixedly mounted on the surface of the lifting frame. A rectangular groove is provided on a side of the hollow plate close to the telescopic block, the telescopic block contacts the inner wall of the rectangular groove, and the annular inner wall of the lifting frame contacts the circumferential surface of the grip rod. The movement of the grip rod drives the lifting frame to move upward, and the movement of the lifting frame drives the round block to move upward. A card slot is provided on a side of the lifting frame close to the telescopic block.

[0010] According to the above technical solution, the telescopic block is provided with an arc surface on a side away from the sliding block, and the top of the lifting frame is provided with an inclined surface 1. The inclined surface 1 of the lifting frame contacts the arc surface of the telescopic block during movement, so that the lifting frame moves and squeezes the arc surface of the telescopic block.

[0011] According to the above technical solution, a No. 1 volute spring is arranged between the rotating rod and the sliding block. The rotating rod stretches the No. 1 volute spring during rotation, and the No. 1 volute spring is deformed by the stretching. The shape of the block is set to be fan-shaped, and the fan surface of the block contacts the inner wall of the door-shaped frame. The side of the block away from the sliding block contacts the inner wall of the door-shaped frame.

[0012] According to the above technical solution, the protective device includes a C-shaped frame, a rubber plate, a No. 2 spring piece, a connecting frame, a rotating shaft, an arc-shaped piece and a rectangular block. The rubber plate moves to squeeze the No. 2 spring piece, and the No. 2 spring piece is deformed by the squeezing. The C-shaped frame is fixedly mounted on the side of the hollow plate close to the round block. The rubber plate slides through the side of the C-shaped frame close to the round block. The No. 2 spring piece is arranged between the rubber plate and the C-shaped frame. The connecting frame is fixedly mounted on the surface of the C-shaped frame. The rotating shaft is rotatably mounted on the inner wall of the connecting frame. The arc-shaped piece is fixedly mounted on the circumferential surface of the rotating shaft. The rectangular block is fixedly mounted on the side of the connecting frame close to the round block. A corrugated groove is provided on the side of the rubber plate away from the No. 2 spring piece, and the corrugated groove contacts the circumferential surface of the round block. When the round block moves upward, the surface of the round block in contact with the corrugated groove of the rubber plate separates, so that the deformed No. 2 spring piece begins to recover. A second inclined surface is provided on the side of the rubber plate close to the arc-shaped piece.

[0013] According to the above technical solution, a No. 2 scroll spring is arranged between the rotating shaft and the connecting frame. The rotating shaft stretches the No. 2 scroll spring during rotation, and the No. 2 scroll spring is deformed due to the stretching. The rectangular block contacts the side of the arc sheet close to the rubber plate.

[0014] The present invention provides a tower crane boom welding auxiliary device, which has the following beneficial effects: (1) In the tower crane boom welding auxiliary device, the gripping rod moves upward to drive the support foot to move upward, and the support foot is separated from the ground during movement. By raising the position of the support foot, not only can the adjustment process be smoother, but also the support foot can be effectively prevented from rubbing against the ground during movement, thereby extending the service life of the support foot. At the same time, the support foot provides support for the boom. By quickly adjusting the position of the connecting frame, the position of the connecting frame providing support for the boom can be flexibly changed, thereby enhancing the stability of the boom itself during the welding process.

[0015] (2) In the tower crane boom welding auxiliary device, the telescopic block contacts the card slot to limit the lifting frame. The telescopic block automatically applies a limiting effect to the lifting frame, which effectively simplifies the operation process and reduces the workload of the operator, thereby improving the overall work efficiency. At the same time, the surface of the block that contacts the door frame is separated during the rotation process. By setting the block to contact the door frame, the telescopic block can be effectively prevented from being separated from the card slot due to improper operation, thereby improving the safety of the welding process.

[0016] (3) In the tower crane boom welding auxiliary device, the arc-shaped piece collides with the rectangular block during the resetting process to generate vibration. The vibration generated by the collision between the arc-shaped piece and the rectangular block can not only effectively prevent the lifting frame from getting stuck during movement, but also ensure that the telescopic block can smoothly contact the slot. At the same time, the speed of the circular block moving downward is slowed down by the reaction force. By applying additional resistance when the circular block moves downward, the impact force generated when the support foot is reset downward and contacts the ground can be effectively slowed down, thereby effectively improving the stability of the welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a structural schematic diagram of the fixing frame of the present invention; Figure 3 Schematic diagram of the internal structure of the support device of the present invention; Figure 4 For the present invention Figure 3 A in the middle is an enlarged structural diagram; Figure 5 This is a schematic diagram of the position structure of the locking device and the protective device of the present invention; Figure 6This is a schematic diagram of the internal structure of the locking device of the present invention; Figure 7 This is a schematic diagram of the position structure of the first spring piece of the present invention; Figure 8 Schematic diagram of the internal structure of the protective device of the present invention.

[0018] In the figure: 1. Mobile base; 2. Mounting plate; 3. Fixed frame; 4. Lifting arm; 5. Carrying tube; 6. Sliding rod; 7. Connecting frame; 8. Hollow tube; 9. Support foot; 10. Spring No. 1; 11. Grip rod; 12. Limit rod; 13. Spring No. 2; 141. Hollow plate; 142. Lifting frame; 143. Door frame; 144. Sliding block; 145. Telescopic block; 146. Spring No. 1; 147. Rotating rod; 148. Block; 149. Round block; 151. C-shaped frame; 152. Rubber plate; 153. Spring No. 2; 154. Connecting frame; 155. Rotating shaft; 156. Arc-shaped piece; 157. Rectangular block. DETAILED DESCRIPTION

[0019] The following will provide a clear and complete description of 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. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 4 One embodiment of the present invention is: a tower crane boom welding auxiliary device, comprising a mobile base 1, a mounting plate 2 is fixedly mounted on the surface of the mobile base 1, a fixing frame 3 is fixedly mounted on the side of the mounting plate 2 away from the mobile base 1, a boom 4 is fixedly mounted on the top of the fixing frame 3, and a supporting device is also included; wherein the supporting device includes a carrying tube 5, a sliding rod 6, a connecting frame 7, a hollow tube 8, a supporting foot 9, a No. 1 spring 10 and a gripping rod 11, the carrying tube 5 is fixedly passed through the surface of the fixing frame 3, the sliding rod 6 is slidably mounted on the inner wall of the carrying tube 5, the connecting frame 7 is fixed It is fixedly installed on the side of the sliding rod 6 close to the boom 4, the hollow tube 8 is fixedly installed on the bottom of the connecting frame 7, the supporting foot 9 slides through the bottom of the hollow tube 8, and the No. 1 spring 10 is arranged between the supporting foot 9 and the connecting frame 7. The grip rod 11 is fixedly installed on the circumferential surface of the supporting foot 9, and the grip rod 11 slides through the circumferential surface of the hollow tube 8. A sliding groove is provided on the side of the connecting frame 7 close to the boom 4, and the sliding groove contacts the bottom of the boom 4. By raising the position of the supporting foot 9, not only can the adjustment process be made smoother, but also the supporting foot 9 can be effectively prevented from rubbing against the ground during movement.

[0021] The top of the carrying tube 5 slides through the limit rod 12, and a No. 2 spring 13 is arranged between the limit rod 12 and the carrying tube 5. A number of circular grooves are opened on the circumferential surface of the sliding rod 6, and the bottom of the limit rod 12 contacts the inner wall of the circular groove. By quickly adjusting the position of the connecting frame 7, the position of the connecting frame 7 to provide support for the lifting arm 4 can be flexibly changed, thereby enhancing the stability of the lifting arm 4 itself during the welding process.

[0022] A support frame is fixedly installed on one side of the fixing frame 3 close to the sliding rod 6. A circular hole is opened on the support frame, and the circumferential surface of the sliding rod 6 contacts the inner wall of the circular hole. By setting the support frame, the stability of the welding process is effectively improved.

[0023] When the embodiment is working, the support foot 9 provides support for the boom 4 through the connecting frame 7, so that the connecting frame 7 can apply an upward supporting force to the bottom of the boom 4 during welding, thereby improving the stability of the boom 4 itself. When the position of the connecting frame 7 needs to be adjusted, the limit rod 12 is manually pulled to move upward. The limit rod 12 squeezes the second spring 13 during the movement. The second spring 13 is squeezed and deformed. At the same time, the contact surface of the limit rod 12 and the circular groove is separated, so that the limit imposed by the limit rod 12 on the sliding rod 6 is released, and then the sliding rod 6 is controlled to move toward the boom. 4 direction, the sliding rod 6 moves to drive the connecting frame 7 to move in the direction away from the fixed frame 3. When the connecting frame 7 moves, the lifting arm 4 provides the necessary supporting force for the connecting frame 7 to ensure that the connecting frame 7 can move smoothly. At the same time, the connecting frame 7 moves to drive the hollow tube 8 to move in the direction away from the fixed frame 3. The hollow tube 8 moves to drive the supporting foot 9 to move in the direction away from the fixed frame 3. When the connecting frame 7 moves to the bottom of the position to be welded, the limit rod 12 is released, so that the deformed No. 2 spring 13 is restored to drive the limit rod 12 to move downward. The limit rod 12 is The support legs 9 are then moved back to the original position so that the support legs 9 can be adjusted to the desired position.

[0024] See also Figures 1-8 On the basis of the above embodiment, in another embodiment of the present invention, a locking device for locking the gripping rod 11 is provided on the hollow tube 8, and a protective device for improving safety is provided on the locking device; the locking device includes a hollow plate 141, a lifting frame 142, a door-shaped frame 143, a sliding block 144, a telescopic block 145, a No. 1 spring piece 146, a rotating rod 147, a stop block 148 and a round block 149, the hollow plate 141 is fixedly mounted on the circumferential surface of the hollow tube 8, the lifting frame 142 slides through the inner and outer walls of the hollow plate 141, the door-shaped frame 143 is fixedly mounted on a side of the hollow plate 141 away from the hollow tube 8, the sliding block 144 is slidably mounted on the inner wall of the door-shaped frame 143, and the telescopic block 145 slides through the sliding block 144 On the side close to the hollow plate 141, the No. 1 spring piece 146 is arranged between the telescopic block 145 and the sliding block 144, the rotating rod 147 is rotatably installed on the side of the sliding block 144 away from the hollow plate 141, the stop block 148 is fixedly installed on the circumferential surface of the rotating rod 147, and the round block 149 is fixedly installed on the surface of the lifting frame 142. A rectangular groove is provided on the side of the hollow plate 141 close to the telescopic block 145, the telescopic block 145 contacts the inner wall of the rectangular groove, and the annular inner wall of the lifting frame 142 contacts the circumferential surface of the grip rod 11. A card slot is provided on the side of the lifting frame 142 close to the telescopic block 145, and the telescopic block 145 automatically applies a limiting effect to the lifting frame 142, which effectively simplifies the operation process and reduces the workload of the operator.

[0025] The telescopic block 145 has an arc surface on one side away from the sliding block 144 , and the top of the lifting frame 142 has an inclined surface 1. The inclined surface 1 ensures that when the lifting frame 142 contacts the telescopic block 145 , the telescopic block 145 can be smoothly squeezed to move.

[0026] A No. 1 spiral spring is arranged between the rotating rod 147 and the sliding block 144. The shape of the stop block 148 is set to be fan-shaped. The fan surface of the stop block 148 contacts the inner wall of the door-shaped frame 143, and the side of the stop block 148 away from the sliding block 144 contacts the inner wall of the door-shaped frame 143. By setting the stop block 148 to contact the door-shaped frame 143, the telescopic block 145 can be effectively prevented from being detached from the slot due to improper operation, thereby improving the safety of the welding process.

[0027] The protective device includes a C-shaped frame 151, a rubber plate 152, a second spring piece 153, a connecting frame 154, a rotating shaft 155, an arc piece 156 and a rectangular block 157. The C-shaped frame 151 is fixedly mounted on the side of the hollow plate 141 close to the round block 149. The rubber plate 152 slides through the side of the C-shaped frame 151 close to the round block 149. The second spring piece 153 is set between the rubber plate 152 and the C-shaped frame 151. The connecting frame 154 is fixedly mounted on the surface of the C-shaped frame 151. The rotating shaft 155 is rotatably mounted on the inner wall of the connecting frame 154. The arc piece 156 is fixedly mounted on the surface of the C-shaped frame 151. The arc piece 156 is fixedly mounted on the circumferential surface of the rotating shaft 155, and the rectangular block 157 is fixedly mounted on the side of the connecting frame 154 close to the circular block 149. A corrugated groove is provided on the side of the rubber plate 152 away from the second spring piece 153, and the corrugated groove is in contact with the circumferential surface of the circular block 149. A second inclined surface is provided on the side of the rubber plate 152 close to the arc piece 156. Vibration is generated by the collision between the arc piece 156 and the rectangular block 157, which can not only effectively prevent the lifting frame 142 from getting stuck during movement, but also ensure that the telescopic block 145 can smoothly contact the slot.

[0028] A No. 2 spiral spring is arranged between the rotating shaft 155 and the connecting frame 154. The rectangular block 157 contacts the side of the arc-shaped piece 156 close to the rubber plate 152. By applying additional resistance when the round block 149 moves downward, the impact force generated when the supporting foot 9 is reset downward and contacts the ground can be effectively reduced, thereby effectively improving the stability of the welding process.

[0029] When the present embodiment is working, the movement of the handle 11 drives the lifting frame 142 to move upward, and the movement of the lifting frame 142 drives the round block 149 to move upward. At the same time, the inclined surface 1 of the lifting frame 142 contacts the arc surface of the telescopic block 145 during the movement, so that the lifting frame 142 moves and squeezes the arc surface of the telescopic block 145. The telescopic block 145 is squeezed and moves toward the sliding block 144. The telescopic block 145 squeezes the first spring piece 146 during the movement. The first spring piece 146 is squeezed and deformed. The lifting frame 142 continues to move and contacts the telescopic block. The contact surface of 145 is separated, so that the deformed spring piece 146 is restored and drives the telescopic block 145 to move away from the sliding block 144. The telescopic block 145 contacts the inner wall of the card slot during movement, so that the telescopic block 145 limits the lifting frame 142. The lifting frame 142 is limited and cannot be reset downward, ensuring that the supporting foot 9 is maintained at the set height. The telescopic block 145 automatically limits the lifting frame 142, effectively simplifying the operation process, reducing the workload of the operator, and thus improving the overall In order to improve the efficiency of the work of the body, when the limit needs to be released, the rotating rod 147 is first controlled to rotate clockwise. The rotating rod 147 stretches the No. 1 scroll spring during rotation. The No. 1 scroll spring is deformed by the stretching. At the same time, the rotating rod 147 rotates to drive the block 148 to rotate clockwise. The block 148 is separated from the contact surface of the door frame 143 during the rotation, thereby releasing the limit imposed by the door frame 143 on the rotating rod 147, pulling the rotating rod 147 to move away from the hollow plate 141, and the movement of the rotating rod 147 drives the block 148 moves in a direction away from the hollow plate 141, and at the same time, the rotating rod 147 moves to drive the sliding block 144 to move in a direction away from the hollow plate 141, and the sliding block 144 moves to drive the telescopic block 145 to move in a direction away from the hollow plate 141. During the movement, the telescopic block 145 separates from the card slot, thereby releasing the limit of the lifting frame 142. By providing the stop block 148 to contact the door frame 143, the telescopic block 145 can be effectively prevented from being separated from the card slot due to improper operation, thereby improving the safety of the welding process; When the round block 149 moves upward, the surface of the round block 149 in contact with the corrugated groove of the rubber plate 152 is separated, so that the deformed No. 2 spring 153 recovers and drives the rubber plate 152 to move toward the direction close to the round block 149, and the round block 149 continues to move and contacts the curved surface of the arc piece 156, so that the round block 149 moves and drives the arc piece 156 to rotate upward. During the rotation, the arc piece 156 is separated from the surface in contact with the rectangular block 157. At the same time, the rotation of the arc piece 156 drives the rotating shaft 155 to rotate upward. During the rotation, the rotating shaft 155 stretches the No. 2 scroll spring. The No. 2 scroll spring is deformed by the stretching, and the deformed No. 2 scroll spring Energy is stored under the action of its own elasticity. When the contact surface of the round block 149 and the arc piece 156 is separated, the deformed No. 2 scroll spring recovers and drives the rotating shaft 155 to reset quickly. The rotating shaft 155 rotates and drives the arc piece 156 to reset quickly. The arc piece 156 collides with the rectangular block 157 during the reset process to generate vibration. The rectangular block 157 transmits the vibration to the moving lifting frame 142, making the lifting frame 142 smoother in movement. The vibration generated by the collision between the arc piece 156 and the rectangular block 157 can not only effectively prevent the lifting frame 142 from being stuck in movement, but also ensure that the telescopic block 145 can be smoothly connected with the card The circular block 149 contacts the groove, and when the circular block 149 resets downward, the circular block 149 contacts the inner concave surface of the arc piece 156 during movement. Since the arc piece 156 is blocked by the rectangular block 157 and cannot rotate downward, the circular block 149 squeezes the arc piece 156 during movement, and the arc piece 156 is squeezed and deformed. The deformed arc piece 156 exerts a reaction force on the moving circular block 149, and the speed of the circular block 149 moving downward is slowed down by the reaction force. When the surface of the circular block 149 contacting the arc piece 156 is separated, the deformed arc piece 156 quickly returns to its starting state, and the circular block 149 continues to move and contact the rubber plate 1 The second bevel of the rubber plate 152 contacts the second bevel of the rubber plate 152, the round block 149 moves and squeezes the second bevel, and the rubber plate 152 is squeezed and moves in the direction away from the round block 149. The rubber plate 152 moves and squeezes the second spring piece 153, and the second spring piece 153 is squeezed and deformed. The deformed second spring piece 153 exerts a reaction force on the rubber plate 152, so that the corrugated groove of the rubber plate 152 maintains close contact with the round block 149, thereby improving the stability of the round block 149. By applying additional resistance when the round block 149 moves downward, the impact force generated when the support foot 9 resets downward and contacts the ground can be effectively reduced, thereby effectively improving the stability of the welding process.

[0030] 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 tower crane boom welding auxiliary device, comprising a movable base (1), characterized in that: A mounting plate (2) is fixedly mounted on the surface of the mobile base (1); a fixing frame (3) is fixedly mounted on a side of the mounting plate (2) away from the mobile base (1); a lifting arm (4) is fixedly mounted on the top of the fixing frame (3); and a supporting device is also included; Wherein, the supporting device comprises a carrying tube (5), a sliding rod (6), a connecting frame (7), a hollow tube (8), a supporting foot (9), a No. 1 spring (10) and a gripping rod (11), wherein the carrying tube (5) is fixedly mounted on the surface of the fixing frame (3), the sliding rod (6) is slidably mounted on the inner wall of the carrying tube (5), the connecting frame (7) is fixedly mounted on a side of the sliding rod (6) close to the boom (4), the hollow tube (8) is fixedly mounted on the bottom of the connecting frame (7), the supporting foot (9) is slidably mounted on the bottom of the hollow tube (8), the No. 1 spring (10) is arranged between the supporting foot (9) and the connecting frame (7), the gripping rod (11) is fixedly mounted on the circumferential surface of the supporting foot (9), the gripping rod (11) is slidably mounted on the circumferential surface of the hollow tube (8), and a sliding groove is provided on a side of the connecting frame (7) close to the boom (4), and the sliding groove contacts the bottom of the boom (4); Wherein, a locking device for locking the gripping rod (11) is provided on the hollow tube (8), and a protective device for improving safety is provided on the locking device.

2. The tower crane boom welding auxiliary device according to claim 1, characterized in that: The top of the carrying tube (5) slides through the limiting rod (12), a second spring (13) is provided between the limiting rod (12) and the carrying tube (5), a plurality of circular grooves are provided on the circumferential surface of the sliding rod (6), and the bottom of the limiting rod (12) contacts the inner wall of the circular groove.

3. The tower crane boom welding auxiliary device according to claim 2, characterized in that: A support frame is fixedly mounted on one side of the fixed frame (3) close to the sliding rod (6), and a circular hole is provided on the support frame. The circumferential surface of the sliding rod (6) contacts the inner wall of the circular hole.

4. The tower crane boom welding auxiliary device according to claim 3, characterized in that: The locking device comprises a hollow plate (141), a lifting frame (142), a door-shaped frame (143), a sliding block (144), a telescopic block (145), a No. 1 spring (146), a rotating rod (147), a stop block (148) and a round block (149), wherein the hollow plate (141) is fixedly mounted on the circumferential surface of the hollow tube (8), the lifting frame (142) slides through the inner and outer walls of the hollow plate (141), the door-shaped frame (143) is fixedly mounted on a side of the hollow plate (141) away from the hollow tube (8), the sliding block (144) is slidably mounted on the inner wall of the door-shaped frame (143), and the telescopic block (145) slides through the sliding block (144) near the hollow plate (141) ), the first spring piece (146) is arranged between the telescopic block (145) and the sliding block (144), the rotating rod (147) is rotatably mounted on the side of the sliding block (144) away from the hollow plate (141), the stop block (148) is fixedly mounted on the circumferential surface of the rotating rod (147), the circular block (149) is fixedly mounted on the surface of the lifting frame (142), a rectangular groove is provided on a side of the hollow plate (141) close to the telescopic block (145), the telescopic block (145) contacts the inner wall of the rectangular groove, the annular inner wall of the lifting frame (142) contacts the circumferential surface of the gripping rod (11), and a card slot is provided on a side of the lifting frame (142) close to the telescopic block (145).

5. The tower crane boom welding auxiliary device according to claim 4, characterized in that: A curved surface is provided on a side of the telescopic block (145) away from the sliding block (144), and a first inclined surface is provided on the top of the lifting frame (142).

6. The tower crane boom welding auxiliary device according to claim 5, characterized in that: A first volute spring is provided between the rotating rod (147) and the sliding block (144), the shape of the retaining block (148) is set to be fan-shaped, the fan surface of the retaining block (148) contacts the inner wall of the door-shaped frame (143), and the side of the retaining block (148) away from the sliding block (144) contacts the inner wall of the door-shaped frame (143).

7. The tower crane boom welding auxiliary device according to claim 6, characterized in that: The protective device comprises a C-shaped frame (151), a rubber plate (152), a second spring piece (153), a connecting frame (154), a rotating shaft (155), an arc-shaped piece (156) and a rectangular block (157), wherein the C-shaped frame (151) is fixedly mounted on a side of the hollow plate (141) close to the round block (149), the rubber plate (152) slides through a side of the C-shaped frame (151) close to the round block (149), the second spring piece (153) is arranged between the rubber plate (152) and the C-shaped frame (151), and the connecting frame (154) The rubber plate (152) is fixedly mounted on the surface of the C-shaped frame (151), the rotating shaft (155) is rotatably mounted on the inner wall of the connecting frame (154), the arc-shaped piece (156) is fixedly mounted on the circumferential surface of the rotating shaft (155), the rectangular block (157) is fixedly mounted on the side of the connecting frame (154) close to the round block (149), a corrugated groove is provided on the side of the rubber plate (152) away from the second spring piece (153), the corrugated groove is in contact with the circumferential surface of the round block (149), and a second inclined surface is provided on the side of the rubber plate (152) close to the arc-shaped piece (156).

8. The tower crane boom welding auxiliary device according to claim 7, characterized in that: A second volute spring is provided between the rotating shaft (155) and the connecting frame (154), and the rectangular block (157) contacts a side of the arc-shaped piece (156) close to the rubber plate (152).

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