Welding device for building steel structure joints

Abstract

The invention relates to the technical field of welding, in particular to a welding device for building steel structure joints. The technical problem of potential safety hazards such as deformation and defects of weld joints easily caused by hand shaking of workers is solved. According to the technical scheme, the device comprises a handle, a supporting cylinder, a rotating cylinder, a rotating smooth unit and the like, the supporting cylinder is arranged at one end of the handle, the rotating cylinder is rotationally arranged on the supporting cylinder, and the rotating smooth unit is arranged on the rotating cylinder and the supporting cylinder. By arranging the telescopic pipe, a worker holds a handle to swing left and right, so that a supporting cylinder drives a rotating cylinder to rotate, the rotating cylinder extrudes the telescopic pipe, the gas pressure in the telescopic pipe is increased, thrust is generated, and the rotating cylinder drives a gooseneck pipe to drive the welding end of a welding wire to stably move through a conductive part; therefore, the thickness of a welding seam formed by welding is uniform, and the welding seam quality is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, and particularly to a welding device for building steel structure joints. Background Art

[0002] Steel structure is a building load-bearing structure made of steel, which has the characteristics of high strength, light weight, good seismic resistance and strong maintainability, so that steel structures are widely used in the fields of buildings, bridges, towers, etc.

[0003] In the connection method of steel structures, welding is a key process for steel structures. On the construction site, workers generally use manual welding of steel structures by carbon dioxide gas shielded welding. However, slight shaking of the workers' hands will make the moving speed of the welding torch unstable, resulting in uneven distribution of the welding material during welding. This situation is more obvious when welding wider welds. Uneven distribution of the welding material will lead to the formation of welding beads. Moreover, during the process of the welding material cooling to form a weld, the local heat dissipation of the weld is slow, resulting in internal stress in the weld. The appearance of internal stress will reduce the strength of the weld. In severe cases, weld deformation, internal cracking or the appearance of air bubbles in the weld will occur. Therefore, a welding device for building steel structure joints that can improve the welding effect and the stability of the welding process is provided to avoid potential safety hazards such as weld deformation and defects caused by slight shaking of the workers' hands. Summary of the Invention

[0004] In order to overcome the shortcomings that slight shaking of the workers' hands easily causes potential safety hazards such as weld deformation and defects, the technical problem of the present invention is: to provide a welding device for building steel structure joints that can improve the welding effect and the stability of the welding process.

[0005] The technical solution of the present invention is: a welding device for building steel structure joints, comprising: A handle; A support cylinder, the support cylinder is arranged at one end of the handle; A rotating cylinder, the rotating cylinder is rotatably arranged on the support cylinder; A rotation smoothing unit, the rotation smoothing unit is arranged on the rotating cylinder and the support cylinder, and is used to make the left and right rotation of the rotating cylinder smooth, and prevent the rotating cylinder from moving too fast when welding wide joints of steel structures; A movement smoothing unit, the movement smoothing unit is arranged on the rotating cylinder, and is used to smooth the speed of the welding wire during movement, and prevent the welding material from being unevenly distributed on the steel structure; A gooseneck tube, the gooseneck tube is arranged on the movement smoothing unit, and a conductive part for melting the welding wire is installed inside the gooseneck tube; A nozzle, the nozzle is arranged at one end of the gooseneck tube; The support and auxiliary unit is arranged on the gooseneck tube and is used to assist in positioning the positions and angles of the steel structure and the welding wire.

[0006] Furthermore, the rotation smoothing unit includes: The telescopic tubes are symmetrically distributed between the support cylinder and the rotating cylinder, and the inside of the telescopic tubes is filled with gas.

[0007] The threaded knobs are arranged on the rotating cylinder in a mirror image distribution through threads, and one end of each threaded knob is located inside the telescopic tube.

[0008] Furthermore, the rotation smoothing unit further includes: The pressing knob is arranged on the support cylinder through threads. The bottom end of the pressing knob has a relatively large coefficient of roughness, and the bottom end of the pressing knob contacts the rotating cylinder.

[0009] Furthermore, the movement smoothing unit includes: The first sliding ring. The rotating cylinder is provided with a chute in a circumferential distribution. The first sliding ring is slidably arranged on the chute, and the first sliding ring is fixedly connected to the gooseneck tube; The first spring is arranged between the first sliding ring and the rotating cylinder.

[0010] Furthermore, the movement smoothing unit further includes: The second sliding ring is arranged on the chute, and the second sliding ring is fixedly connected to the gooseneck tube; The second spring is arranged at one end of the second sliding ring; The rotating ring is arranged at one end of the second spring, and the rotating ring is sleeved and slidably connected to the rotating cylinder; The adjusting ring is rotatably arranged on the rotating ring, and the adjusting ring is threadedly connected to the rotating cylinder.

[0011] Furthermore, the movement smoothing unit further includes: The first damping ring is arranged on the gooseneck tube; The first rotating bracket is rotatably arranged on the first damping ring, and the first rotating bracket is rotatably connected to the gooseneck tube; The first connecting rod is rotatably arranged on the first rotating bracket; The counterweight is arranged at one end of the first connecting rod; The second damping ring is arranged on the rotating cylinder; The second rotating frame is rotatably arranged on the second damping ring, and the second rotating frame is rotatably connected to the rotating cylinder; The second connecting rod is rotatably arranged on the second rotating frame, and one end of the second connecting rod is rotatably connected to the first connecting rod.

[0012] Furthermore, the moving smoothing unit further includes: A tapered thread knob, a tapered threaded groove is formed at one end of the second connecting rod, and the tapered thread knob is arranged in the tapered threaded groove; A rubber strip, the rubber strips are annularly distributed on the tapered threaded groove of the second connecting rod, one side of the rubber strip contacts the first connecting rod, and the rubber strip is extrusion-fitted with the tapered thread knob.

[0013] Furthermore, the supporting and assisting unit includes: A supporting sleeve is arranged on the gooseneck tube; Bent rods are symmetrically distributed on the supporting sleeve; A torsion spring, one end of the torsion spring is arranged on the bent rod, and the other end of the torsion spring is fixedly connected to the supporting sleeve; A flexible rotating rod is arranged on the symmetrically distributed bent rods.

[0014] Furthermore, the supporting and assisting unit further includes: Universal ball bearings are vertically distributed on the bent rod.

[0015] Furthermore, the supporting and assisting unit further includes: A clamping column, a cylindrical groove is formed on the supporting sleeve, the clamping column is slidably arranged in the cylindrical groove, and a spherical groove capable of cooperating with the clamping column is formed on the bent rod; A third spring is arranged between the clamping column and the cylindrical groove.

[0016] The beneficial effects of the present invention are as follows: 1. By providing the telescopic tube in the present invention, when the gap at the welded joint of the steel structure is relatively wide, the staff holds the handle and swings it left and right, so that the supporting cylinder drives the rotating cylinder to rotate, and then the rotating cylinder squeezes the telescopic tube. The volume inside the telescopic tube decreases, causing the air pressure inside it to rise, thereby generating a thrust that inhibits the continuous rotation of the rotating cylinder and drives the rotating cylinder to reset, enabling the rotating cylinder to rotate smoothly during the left and right movement. The rotating cylinder drives the gooseneck tube to drive the welding end of the welding wire to move smoothly through the conductive parts, preventing the situation where the movement speed of the welding wire is unstable due to the hand shaking of the staff. Furthermore, the thickness of the weld formed by welding is uniform, avoiding the formation of weld beads due to uneven weld thickness, and further avoiding structural defects such as internal stress, cracks, and bubbles generated when the weld cools, thus ensuring the quality of the weld.

[0017] 2. By providing the first spring and the second spring in the present invention, when the rotating cylinder moves axially, the gooseneck tube will remain stationary due to inertia at the moment when the rotating cylinder moves axially. The axial movement of the rotating cylinder drives the deformation of the first spring and the second spring, and then the elastic force of the first spring and the second spring is released to drive the gooseneck tube to move. Thus, the gooseneck tube drives the welding wire to move smoothly through the conductive parts, preventing the situation that the movement speed of the welding wire is unstable due to the shaking of the worker's hand. As a result, the thickness of the weld formed by welding is uniform, avoiding the formation of weld beads due to uneven weld thickness, and further avoiding the generation of internal stress, cracks, bubbles and other structural defects when the weld cools, ensuring the quality of the weld.

[0018] 3. By providing the bent rod and the flexible rotating rod in the present invention, when the worker welds a straight weld with a small width, the gooseneck tube drives the welding wire to approach the weld through the conductive parts, and drives one end of the bent rod to move through the support sleeve. Thus, one end of the bent rod rotates along the connection with the support sleeve, and the flexible rotating rod restricts the two bent rods to always maintain the same rotation angle. Therefore, the welding wire maintains the same angle with the surfaces of the two steel structure parts, and the welding wire can be aligned with the gap of the steel structure at the best angle. As a result, the thickness of the weld is uniform along the width direction, avoiding the generation of internal stress, cracks, bubbles and other structural defects when the weld cools, and further ensuring the quality of the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the schematic diagram of the overall structure of the present invention; Figure 2 is the sectional view of the gooseneck tube of the present invention; Figure 3 is the exploded view of the support cylinder, the rotating cylinder, the gooseneck tube and the nozzle of the present invention; Figure 4 is the sectional view of the support cylinder of the present invention; Figure 5 is the sectional view of the rotating cylinder of the present invention; Figure 6 For the present invention Figure 5 is the enlarged view at A of the present invention; Figure 7 is the sectional view of the first rotating frame and the second rotating frame of the present invention; Figure 8 is the structural diagram of the second connecting rod of the present invention; Figure 9 is the sectional view of the second connecting rod of the present invention; Figure 10 is the sectional view of the support auxiliary unit of the present invention; Figure 11 For the present invention Figure 10 is the enlarged view at B of the present invention.

[0020] In the above drawings: 1: handle; 2: support cylinder; 3: rotating cylinder, 301: chute; 4: rotating smooth unit, 401: telescopic tube, 402: threaded knob, 403: pressing knob; 5: moving smooth unit, 501: first sliding ring, 502: first spring, 503: second sliding ring, 504: second spring, 506: adjusting ring, 505: rotating ring, 507: first damping ring, 508: first rotating bracket, 509: first connecting rod, 510: counterweight, 511: second damping ring, 512: second rotating bracket, 513: second connecting rod, 514: tapered threaded knob, 515: rubber strip; 6: gooseneck tube, 601: nozzle; 7: support auxiliary unit, 701: support sleeve, 7011: cylindrical groove, 702: bent rod, 7021: spherical groove, 703: torsion spring, 704: flexible rotating rod, 705: universal ball, 706: clamping post, 707: third spring. Detailed implementation manners The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the present invention are shown. However, the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness and fully convey the scope of the present invention to those skilled in the art.

[0022] Embodiment 1 A welding device for a building steel structure joint, as Figures 1-4As shown in the figure, it includes a handle 1, a support cylinder 2, a rotating cylinder 3, a rotating smooth unit 4, a moving smooth unit 5, a gooseneck tube 6, a nozzle 601 and a support auxiliary unit 7. The support cylinder 2 is fixedly connected to one end of the handle 1. The rotating cylinder 3 is rotatably connected to the support cylinder 2. The rotating smooth unit 4 is arranged on the rotating cylinder 3 and the support cylinder 2 to make the left and right rotation of the rotating cylinder 3 smooth and prevent the rotating cylinder 3 from rotating too fast when welding the wide seam of the steel structure. The moving smooth unit 5 is arranged on the rotating cylinder 3 to smooth the speed of the welding wire during movement and prevent the molten solder from being unevenly distributed at the weld seam. The gooseneck tube 6 is arranged on the moving smooth unit 5. At one end inside the gooseneck tube 6, there is a conductive part for melting the welding wire. The conductive part also has the function of positioning the welding wire, including a welding tip and a shunt (both are prior arts, so the specific structure and working principle will not be elaborated). The nozzle 601 is threadedly clamped to one end of the gooseneck tube 6. The support auxiliary unit 7 is arranged on the gooseneck tube 6 to assist in positioning the position and angle of the steel structure and the welding wire, prevent the welding angle of the welding wire from deviating around the weld seam, make the weld seam have a uniform thickness in the width direction, and ensure the weld quality. When welding a relatively wide weld seam, the operator needs to first weld a support weld bridge between the weld seams, and then move the welding wire left and right to fill the weld seam. The rotating smooth unit 4 can make the wide seam welding more uniform. In addition, if the welding wire stays at the weld seam for too long, it will cause welding defects such as weld beads. The moving smooth unit 5 can make the movement of the welding wire more stable. During the welding process, the greater the inclination angle between the welding wire and the surface of the steel structure, the more uneven the thickness of the weld seam when the solder melts. The support auxiliary unit 7 can limit the welding angle of the welding wire and ensure the weld quality.

[0023] As Figures 3-4 shown, the rotating smooth unit 4 includes a telescopic tube 401 and a threaded knob 402. One end of the telescopic tube 401 is symmetrically and fixedly connected to the support cylinder 2. There are two telescopic tubes 401. The other end of the telescopic tube 401 is fixedly connected to the rotating cylinder 3. And the inside of the telescopic tube 401 is filled with gas. When the rotating cylinder 3 rotates on the support cylinder 2, the rotating cylinder 3 will squeeze the telescopic tube 401 to make the telescopic tube 401 contract, so that the gas inside the telescopic tube 401 is compressed. The compression of the gas inside the telescopic tube 401 enables the pressure of the gas on the rotating cylinder 3 to keep the rotation of the rotating cylinder 3 smooth, thus ensuring the stable movement of the welding wire when the rotating cylinder 3 rotates. The threaded knobs 402 are mirror-symmetrically distributed and threadedly connected to the rotating cylinder ③. One end of the threaded knob 402 is located inside the telescopic tube 401. When the threaded knob 402 rotates, it can adjust the length inside the telescopic tube 401, so that the threaded knob 402 squeezes the gas inside the telescopic tube 401, thereby increasing the pressure of the gas inside the telescopic tube 401 on the rotating cylinder 3.

[0024] As Figure 4As shown, the rotation smoothing unit 4 further includes a pressing knob 403. The pressing knob 403 is threadedly connected to the support cylinder 2. The bottom end of the pressing knob 403 has a relatively large coefficient of roughness, and the bottom end of the pressing knob 403 contacts the rotating cylinder 3, so that the rotating cylinder 3 is hindered by the frictional force generated by being squeezed by the pressing knob 403 during rotation, thereby reducing the rotation sensitivity of the rotating cylinder 3.

[0025] As Figures 5-7 shown, the movement smoothing unit 5 includes a first sliding ring 501 and a first spring 502. The rotating cylinder 3 is annularly provided with a chute 301. The first sliding ring 501 is mounted on the chute 301 through the first balls inside. The first sliding ring 501 is fixedly connected to the gooseneck tube 6, so that the gooseneck tube 6 can slide on the rotating cylinder 3 through the first sliding ring 501 without much resistance. One end of the first spring 502 is fixedly connected to the first sliding ring 501, and the other end of the first spring 502 is fixedly connected to the rotating cylinder 3, which is used to smooth the sliding of the gooseneck tube 6 on the rotating cylinder 3 through the first sliding ring 501.

[0026] As Figure 3 and Figures 5-7 shown, the movement smoothing unit 5 further includes a second sliding ring 503, a second spring 504, a rotating ring 505 and an adjusting ring 506. The second sliding ring 503 is mounted on the chute 301 through the second balls. The second sliding ring 503 is fixedly connected to the gooseneck tube 6, so that the gooseneck tube 6 can slide on the rotating cylinder 3 through the first sliding ring 501 and the second sliding ring 503, and the second sliding ring 503 can support the gooseneck tube 6 to make the gooseneck tube 6 more stable during movement. One end of the second spring 504 is fixedly connected to one end of the second sliding ring 503, which is used to smooth the sliding of the gooseneck tube 6 on the rotating cylinder 3 through the second sliding ring 503. The rotating ring 505 is slidably arranged on the rotating cylinder 3, and the rotating ring 505 is fixedly connected to the other end of the second spring 504. The adjusting ring 506 is rotatably arranged on the rotating ring 505. The adjusting ring 506 is threadedly connected to the rotating cylinder 3. The adjusting ring 506 can adjust its own position on the rotating cylinder 3 through the thread, and then adjust the compression degree of the second spring 504 through the rotating ring 505, so that the second spring 504 can adjust the position of the gooseneck tube 6 at the rotating cylinder 3, and adjust the rotation sensitivity of the rotating cylinder 3 by changing the gravity distribution of the gooseneck tube 6 on the rotating cylinder 3.

[0027] As Figures 5-6 and Figures 8-9As shown in the figure, the moving smoothing unit 5 further includes a first damping ring 507, a first rotating frame 508, a first connecting rod 509, a counterweight 510, a second damping ring 511, a second rotating frame 512 and a second connecting rod 513. The first damping ring 507 is arranged on the gooseneck tube 6. The first rotating frame 508 is rotatably arranged on the first damping ring 507, and the first rotating frame 508 is rotatably connected to the gooseneck tube 6. The first connecting rod 509 is rotatably arranged on the first rotating frame 508. The counterweight 510 is arranged at one end of the first connecting rod 509. The first damping ring 507 restricts the rotation of the first rotating frame 508, preventing the first rotating frame 508 from rotating too sensitively under the gravity of the counterweight 510 when the staff holds the device and adjusts the posture of the device, thereby avoiding the rotation of the first rotating frame 508 interfering with the stable welding of the welding wire through centrifugal force. The second damping ring 511 is arranged on the rotating cylinder 3. The second rotating frame 512 is rotatably arranged on the second damping ring 511, and the second rotating frame 512 is rotatably connected to the rotating cylinder 3, so that the second damping ring 511 restricts the rotation of the second rotating frame 512, preventing the second rotating frame 512 from rotating too sensitively under the gravity of the counterweight 510 when the staff holds the device and adjusts the posture of the device, thereby avoiding the rotation of the second rotating frame 512 interfering with the stable welding of the welding wire through centrifugal force. The second connecting rod 513 is rotatably arranged on the second rotating frame 512, and one end of the second connecting rod 513 is rotatably connected to the first connecting rod 509. When the rotating cylinder 3 is in the vertical posture, the counterweight 510 uses the first connecting rod 509 as a lever and the connection point of the second connecting rod 513 and the first connecting rod 509 as a fulcrum to support the first rotating frame 508, so as to balance the gravity of the counterweight 510, the first rotating frame 508, the first damping ring 507, the gooseneck tube 6, the nozzle 601 and the support auxiliary unit 7, preventing the first rotating frame 508, the first damping ring 507, the gooseneck tube 6, the nozzle 601 and the support auxiliary unit 7 from causing the gooseneck tube 6 to slide up and down at the rotating cylinder 3 due to gravity, and improving the stability when the staff holds the device for welding.

[0028] As Figures 8-9 shown in the figure, the moving smoothing unit 5 further includes a tapered thread knob 514 and a rubber strip 515. A tapered threaded groove is opened at one end of the second connecting rod 513. The tapered thread knob 514 is arranged in the tapered threaded groove. The rubber strip 515 is annularly distributed on the tapered threaded groove of the second connecting rod 513. One side of the rubber strip 515 contacts the first connecting rod 509, and the rubber strip 515 is squeezed and fitted with the tapered thread knob 514. By adjusting the position of the tapered thread knob 514 in the tapered threaded groove of the second connecting rod 513, the pressure of the rubber strip 515 on the first connecting rod 509 is adjusted, so that the gravity balance between the counterweight 510 and the gooseneck tube 6 can be adjusted according to the actual construction situation, thereby improving the applicability of the device.

[0029] When welding a steel structure, the staff will first clean the parts of the steel structure that need to be welded to remove the protective layer and contaminants on the surface of the steel structure. Subsequently, the steel structure is fixed. The staff inserts the welding wire into the handle 1, so that one end of the welding wire passes through the support cylinder 2 and enters the gooseneck tube 6 after passing through the rotating cylinder 3, so that the conductive parts in the gooseneck tube 6 are penetrated and contacted by the welding wire, and then the conductive parts limit the welding wire. The staff exposes one end of the welding wire from the nozzle 601. When the staff moves the handle 1, the handle 1 drives the rotating cylinder 3 to move through the support cylinder 2, so that the rotating cylinder 3 drives the gooseneck tube 6 to move through the first sliding ring 501 and the second sliding ring 503, so that the gooseneck tube 6 drives the welding wire to align with the gap of the steel structure through the conductive parts. When the welding wire contacts the steel structure, by energizing the conductive parts, the current of the conductive parts is transmitted to the steel structure through the welding wire, and then the current spreads to the ground. Since the cross-sectional diameter of the welding wire is small, the resistance of the welding wire is large, and the current passing through the welding wire is large, so that an arc is generated between the welding wire and the steel structure, and a large amount of heat is generated at the same time, melting the welding wire. Subsequently, the staff moves the whole device, and the welding wire moves along the gap of the welding joint of the steel structure with the nozzle 601 to realize the welding of the steel structure. Among them, when the welding wire starts to move along the gap of the welding joint of the steel structure with the nozzle 601, the rotating cylinder 3 is in the same direction as the gap of the welding joint of the steel structure. The gooseneck tube 6 will keep the welding wire, the first sliding ring 501 and the second sliding ring 503 stationary due to inertia at the moment when the rotating cylinder 3 moves axially, so that the rotating cylinder 3 axially moves to squeeze the first spring 502, and drives the rotating ring 505 to move synchronously through the adjusting ring 506, so that the rotating ring 505 stretches the second spring 504. Subsequently, the elastic forces of the first spring 502 and the second spring 504 are released, so that the first spring 502 overcomes the inertia of the first sliding ring 501, and the first sliding ring 501 moves axially along the rotating cylinder 3. The second spring 504 overcomes the inertia of the second sliding ring 503, and the second sliding ring 503 moves axially along the rotating cylinder 3. The first sliding ring 501 and the second sliding ring 503 jointly drive the gooseneck tube 6 to move, so that the gooseneck tube 6 drives the welding wire to move synchronously through the conductive parts. Since the movement of the first sliding ring 501 and the second sliding ring 503 is mainly driven by the first spring 502 and the second spring 504, the first spring 502 and the second spring 504 will delay the movement of the first sliding ring 501 and the second sliding ring 503, so that the movement of the gooseneck tube 6 lags behind that of the rotating cylinder 3. And during the deformation process of the first spring 502 and the second spring 504, they will absorb and slowly release the thrust from the rotating cylinder 3, so that the gooseneck tube 6 moves more smoothly when moving on the rotating cylinder 3. The gooseneck tube 6 drives the welding wire to move synchronously through the conductive parts, so that the welding wire moves smoothly, preventing the situation that the moving speed of the welding wire is unstable due to the shaking of the staff's hand, and then making the thickness of the weld formed uniform, avoiding the formation of weld beads due to uneven weld thickness, and further avoiding structural defects such as internal stress, cracks and bubbles generated when the weld cools, ensuring the weld quality;In addition, to ensure the welding quality of the steel structure, the greater the thickness of the welded part of the steel structure, the greater the width of the gap in the steel structure to be left for the weld. When welding a relatively wide gap in the steel structure, the operator needs to hold the handle 1 and swing it left and right, so that the welding wire reciprocates in the gap of the steel structure, so that the welding wire melts in the gap of the steel structure and forms a weld. Among them, the handle 1 drives the support cylinder 2 to move synchronously, and the support cylinder 2 is rotatably connected to the rotating cylinder 3. During the movement of the support cylinder 2, the rotating cylinder 3 has a tendency to remain stationary in place due to inertia, so that the rotating cylinder 3 is driven to rotate by the traction of the support cylinder 2. During the rotation of the rotating cylinder 3, it will squeeze one of the telescopic tubes 401 and stretch the other telescopic tube 401. When the telescopic tube 401 is compressed, the volume inside the telescopic tube 401 decreases, so that the volume of the gas inside the telescopic tube 401 decreases, and the gas pressure inside the telescopic tube 401 increases, thereby generating a thrust force that inhibits the continuous rotation of the rotating cylinder 3 and drives the rotating cylinder 3 to reset; when the telescopic tube 401 is stretched, the volume inside the telescopic tube 401 increases, so that the volume of the gas inside the telescopic tube 401 increases, and the gas pressure inside the telescopic tube 401 decreases, thereby generating a pulling force that inhibits the continuous rotation of the rotating cylinder 3 and drives the rotating cylinder 3 to reset. The gas pressures in the two telescopic tubes 401 act together on the rotating cylinder 3, so that the rotating cylinder 3 rotates smoothly during the left and right movement. The rotating cylinder 3 drives the gooseneck tube 6 to rotate synchronously through the first sliding ring 501 and the second sliding ring 503, so that the conductive parts in the gooseneck tube 6 drive the welding end of the welding wire to move smoothly, preventing the situation that the movement speed of the welding wire is unstable due to the operator's hand shaking, so that the change in the movement speed of the welding end of the welding wire will not be too fast, and the thickness of the weld formed by welding is more uniform, avoiding the formation of weld beads due to uneven weld thickness, and further avoiding internal stress, cracks, bubbles and other structural defects generated when the weld cools, ensuring the weld quality.

[0030] It should be noted that when the rotating cylinder 3 is in a vertical posture, the gooseneck tube 6 will tend to stretch the first spring 502 by its own gravity and tend to compress the second spring 504 by the second sliding ring 503. At this time, the counterweight 510 uses the first connecting rod 509 as a lever and the connection point between the second connecting rod 513 and the first connecting rod 509 as a fulcrum to support the first rotating frame 508, so that the first rotating frame 508 is squeezed by the first connecting rod 509 to offset the gravity of the gooseneck tube 6, avoiding the situation that the gooseneck tube 6, the first sliding ring 501 and the second sliding ring 503 aggravate the deformation of the first spring 502 and the second spring 504 due to gravity, ensuring that when the rotating cylinder 3 is in a vertical posture, the gooseneck tube 6 moves smoothly and stably along the axial direction of the rotating cylinder 3, and the distribution of the solder during the welding process will be more uniform, thus avoiding the formation of weld beads due to uneven weld thickness and internal stress, cracks, bubbles and other structural defects generated when the weld cools, and further ensuring the weld quality.

[0031] It should be noted that during the welding process of the above-mentioned thick steel structure, the gap of the steel structure is often relatively wide, and the welding wire needs to move back and forth. However, when the gooseneck tube 6 is too far away from the support cylinder 2, the horizontal movement of the support cylinder 2 to drive the rotating cylinder 3 will cause the torque received by the rotating cylinder 3 to be too large, resulting in the rotating cylinder 3 rotating too fast and being difficult to control. In addition, when the total mass of the rotating cylinder 3, the rotation smoothing unit 4, the movement smoothing unit 5, the gooseneck tube 6, the nozzle 601, and the support auxiliary unit 7 is relatively large, it will also cause the rotating cylinder 3 to rotate too fast and be difficult to control, making the rotating cylinder 3 not easy to be stable. In this regard, before welding the steel structure, the staff can turn the pressing knob 403 to adjust the pressure on the rotating cylinder 3 by the pressing knob 403, thereby adjusting the friction force received by the rotating cylinder 3 during rotation, and roughly adjusting the rotation sensitivity of the rotating cylinder 3. The greater the pressure of the pressing knob 403 on the rotating cylinder 3, the greater the friction force received by the rotating cylinder 3 during rotation, so as to adapt to the torque received by the rotating cylinder 3 during rotation, making the rotating cylinder 3 more stable when rotating left and right. When the rotating cylinder 3 rotates, it drives the gooseneck tube 6 to rotate synchronously through the first sliding ring 501 and the second sliding ring 503, so that the gooseneck tube 6 ensures the smooth movement of the welding end of the welding wire through the conductive parts, further ensuring the uniformity of the solder during the welding process, and thus further improving the quality of the weld seam.

[0032] It should be noted that during the welding process of the above-mentioned thick steel structure, when the gooseneck tube 6 is too close to the support cylinder 2, the common center of mass of the rotating cylinder 3, the rotating smoothing unit 4, the moving smoothing unit 5, the gooseneck tube 6, the nozzle 601 and the support auxiliary unit 7 will also be too close to the connection between the support cylinder 2 and the rotating cylinder 3, thereby reducing the torque received when the rotating cylinder 3 rotates. In addition, the excessive pressure of the pressing knob 403 on the rotating cylinder 3 causes the excessive frictional force received when the rotating cylinder 3 rotates. The reduction of the torque received when the rotating cylinder 3 rotates and the excessive pressure received by the rotating cylinder 3 will make it difficult for the rotating cylinder 3 to rotate, making the rotating cylinder 3 more susceptible to the influence of the hand tremor of the staff, and the rotating cylinder 3 is not easy to be stable. In this regard, after adjusting the rotation sensitivity of the rotating cylinder 3 through the pressing knob 403, the staff can rotate the adjusting ring 506, so that the adjusting ring 506 adjusts its position on the rotating cylinder 3 through the thread. When the adjusting ring 506 gradually moves away from the gooseneck tube 6, the adjusting ring 506 drives the rotating ring 505 to gradually move away from the gooseneck tube 6, so that the first spring 502 and the second spring 504 are simultaneously released due to the reduced pressure received, and drive the first sliding ring 501 and the second sliding ring 503 to slide on the rotating cylinder 3 respectively, so that the gooseneck tube 6 gradually approaches the support cylinder 2. By adjusting the position of the gooseneck tube 6 at the rotating cylinder 3, the rotation sensitivity of the rotating cylinder 3 is precisely adjusted, making the rotating cylinder 3 more stable when rotating left and right. When the rotating cylinder 3 rotates, it drives the gooseneck tube 6 to rotate synchronously through the first sliding ring 501 and the second sliding ring 503, so that the gooseneck tube 6 ensures the smooth movement of the welding end of the welding wire through the conductive parts, further ensuring the uniformity of the solder during the welding process, and thus further improving the quality of the weld seam.

[0033] It should be noted that according to different steel structure welding requirements, the staff needs to use different wire diameters of the welding wire and adjust the moving speed of the welding wire during welding. Among them, different wire diameters will affect the total mass at the gooseneck tube 6, thereby affecting the balancing effect of the counterweight 510 on the gooseneck tube 6. The deterioration of the balancing effect of the counterweight 510 on the gooseneck tube 6 will lead to the instability of the movement of the welding wire, thereby reducing the quality of the weld seam. In this regard, before welding the steel structure, the staff can rotate the tapered thread knob 514, so that the tapered thread knob 514 moves in the tapered thread groove of the second connecting rod 513 and squeezes the rubber strip 515. When the rubber strip 515 is squeezed, it will squeeze the first connecting rod 509, thereby increasing the frictional force between the rubber strip 515 and the first connecting rod 509 and reducing the rotation sensitivity of the first connecting rod 509, so that the counterweight 510 can adapt to welding wires of different diameters.

[0034] It should be noted that due to the spatial limitation of the welding environment, when the staff welds the steel structure, they will hold the handle 1 obliquely, which causes the whole device to tilt. The tilting of the whole device will cause the tilting of the wire feeder, and the wire cannot maintain the best welding angle. Moreover, the tilting of the device will increase the welding operation difficulty of the staff, reduce the welding efficiency, and then reduce the quality of the weld, increasing the possibility of structural defects inside the weld. In this regard, the staff can rotate the threaded knob 402 to adjust the length of the threaded knob 402 extending into the telescopic tube 401. When the length of the threaded knob 402 extending into one side of the telescopic tube 401 becomes longer, the threaded knob 402 will compress the gas in one side of the telescopic tube 401, increasing the gas pressure in one side of the telescopic tube 401. The gas in one side of the telescopic tube 401 pushes the rotating cylinder 3 to tilt through the air pressure. On the one hand, the rotating cylinder 3 stretches one side of the telescopic tube 401 and squeezes the other side of the telescopic tube 401. On the other hand, the tilting of the rotating cylinder 3 drives the gooseneck tube 6 to rotate synchronously through the first sliding ring 501 and the second sliding ring 503, so that the gooseneck tube 6 drives the wire feeder to tilt synchronously through the conductive parts, enabling the wire to maintain the best welding angle while the staff holds the handle 1 correctly, thus reducing the welding operation difficulty of the staff, improving the welding efficiency of the staff, and further improving the quality of the weld.

[0035] Embodiment 2 Based on Embodiment 1, as Figures 1-3 and Figures 10-11 shown, the support and auxiliary unit 7 includes a support sleeve 701, a bent rod 702, a torsion spring 703 and a flexible rotating rod 704. The support sleeve 701 is fixedly connected to the gooseneck tube 6. The bent rods 702 are symmetrically distributed on the support sleeve 701. One end of the torsion spring 703 is arranged on the bent rod 702, and the other end of the torsion spring 703 is fixedly connected to the support sleeve 701, enabling one end of the bent rod 702 to move closer to the nozzle 601 by itself. The flexible rotating rod 704 is arranged on the two bent rods 702, so that the rotation angles of the two bent rods 702 always remain the same. The welding angle of the wire feeder at the weld is restricted by the bent rod 702, making the weld formed by welding uniform in thickness along the width direction and ensuring the weld quality.

[0036] As Figure 10 shown, the support and auxiliary unit 7 further includes a universal ball 705. The universal balls 705 are distributed up and down on the bent rod 702 respectively, preventing the uneven frictional force generated by the direct contact between the bent rod 702 and the steel structure from interfering with the movement of the wire feeder, thereby improving the movement stability of the wire feeder during welding.

[0037] As Figure 11As shown, the support auxiliary unit 7 also includes a clamping column 706 and a third spring 707. A cylindrical groove 7011 is provided on the support sleeve 701, and the clamping column 706 is slidably set in the cylindrical groove 7011. A spherical groove 7021 that can cooperate with the clamping column 706 is provided on the bent rod 702. One end of the third spring 707 is set on the clamping column 706, and the other end of the third spring 707 is fixedly connected to the cylindrical groove 7011 of the bent rod 702, so that the third spring 707 can limit the clamping column 706 in the spherical groove 7021 through elastic force, so that the clamping column 706 limits the angle of the bent rod 702, so that when the device is welded in a narrow space, the bent rod 702 can be prevented from interfering with the welding process.

[0038] When the worker welds a linear weld with a smaller width, in order to further ensure the smooth movement of the welding wire during the welding process, the worker can place the universal ball 705 against the surface of two steel structure parts. The worker moves the handle 1 close to the gap of the steel structure, so that the handle 1 drives the rotating cylinder 3 to move through the support cylinder 2, and the rotating cylinder 3 drives the gooseneck tube 6 to move through the first sliding ring 501 and the second sliding ring 503, so that the gooseneck tube 6 drives the welding end of the welding wire to contact the gap of the steel structure through the conductive parts. During the movement, the gooseneck tube 6 passes through the support sleeve 701 Drive one end of the bending rod 702 to move, so that the other end of the bending rod 702 rotates along the connection with the support sleeve 701, and the other end of the bending rod 702 pushes the universal ball 705 to roll on the surface of the steel structure part. The flexible rotating rod 704 limits the two bending rods 702 to always maintain the same rotation angle, so that the welding wire and the surfaces of the two steel structure parts maintain the same angle. The welding wire can be aligned with the gap of the steel structure at the optimal angle, thereby making the weld thickness uniform along the width direction, avoiding internal stress and structural defects such as cracks and bubbles when the weld cools, and further ensuring the quality of the weld.

[0039] When the welding environment is narrow, the bent rod 702 will interfere with the welding process. The staff rotates one of the bent rods 702 so that the spherical groove 7021 on the bent rod 702 is close to the clamping column 706. The rotation of one of the bent rods 702 will drive the other bent rod 702 to rotate through the flexible rotating rod 704. The rotation of the bent rod 702 will cause the torsion spring 703 to deform and store energy. When the spherical groove 7021 on the bent rod 702 is close to the clamping column 706, the third spring 707 releases and pushes the clamping column 706, causing the clamping column 706 to be stuck in the spherical groove 7021, thereby limiting the rotation of the bent rod 702. When the staff needs to use the bent rod 702, by pushing the bent rod 702, the bent rod 702 is simultaneously subjected to the thrust of the staff and the elastic force released by the torsion spring 703. The spherical surface of the spherical groove 7021 squeezes the clamping column 706 upward, and the clamping column 706 overcomes the elastic force of the third spring 707 and resets, so that the bent rod 702 is free from the restriction of the clamping column 706.

[0040] The above embodiments are provided for those skilled in the art to implement or use the present invention. Those skilled in the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the protection scope of the present invention is not limited by the above embodiments, but should be the maximum scope that conforms to the innovative features mentioned in the claims.

Claims

1. A welding device for building steel structure joints, It is characterized by including: a handle (1); a support cylinder (2) provided at one end of the handle (1); a rotating cylinder (3) rotatably provided on the support cylinder (2); a rotation smoothing unit (4) provided on the rotating cylinder (3) and the support cylinder (2) for making the left and right rotation of the rotating cylinder (3) smooth and preventing the rotating cylinder (3) from moving too fast when welding the wide seam of the steel structure; a movement smoothing unit (5) provided on the rotating cylinder (3) for smoothing the speed of the welding wire during movement and preventing the solder from being unevenly distributed on the steel structure; a gooseneck tube (6) provided on the movement smoothing unit (5), and a conductive part for melting the welding wire is installed inside the gooseneck tube (6). A nozzle (601) is provided at one end of the gooseneck tube (6); a support assisting unit (7) is provided on the gooseneck tube (6) for assisting in positioning the position and angle of the steel structure and the welding wire.

2. The welding device for a building steel structure node according to claim 1, characterized in that, The rotation smoothing unit (4) includes: telescopic tubes (401) symmetrically distributed between the support cylinder (2) and the rotating cylinder (3), and the inside of the telescopic tubes (401) is filled with gas. Threaded knobs (402) are mirror-distributed by threads on the rotating cylinder (3), and one end of the threaded knobs (402) is located inside the telescopic tubes (401).

3. The welding device for a building steel structure node according to claim 2, characterized in that, The rotation smoothing unit (4) further includes: a pressing knob (403) provided on the support cylinder (2) by threads, the bottom end of the pressing knob (403) has a relatively large coefficient of roughness, and the bottom end of the pressing knob (403) contacts the rotating cylinder (3).

4. A welding device for a building steel structure node according to claim 1, characterized in that, The movement smoothing unit (5) includes: a first sliding ring (501), a chute (301) is annularly distributed on the rotating cylinder (3), the first sliding ring (501) is slidably provided on the chute (301), and the first sliding ring (501) is fixedly connected to the gooseneck tube (6); a first spring (502) is provided between the first sliding ring (501) and the rotating cylinder (3).

5. The welding device for a building steel structure joint according to claim 4, characterized in that, The movement smoothing unit (5) further includes: a second sliding ring (503) provided on the chute (301), the second sliding ring (503) is fixedly connected to the gooseneck tube (6); a second spring (504) is provided at one end of the second sliding ring (503); a rotating ring (505) is provided at one end of the second spring (504), and the rotating ring (505) is sleeved and slidably connected to the rotating cylinder (3); an adjusting ring (506) is rotatably provided on the rotating ring (505), and the adjusting ring (506) is threadedly connected to the rotating cylinder (3).

6. The welding device for a building steel structure node according to claim 5, characterized in that, The mobile smoothing unit (5) further includes: a first damping ring (507) disposed on the gooseneck tube (6); a first rotating frame (508) rotatably disposed on the first damping ring (507), and the first rotating frame (508) is rotatably connected to the gooseneck tube (6); a first connecting rod (509) rotatably disposed on the first rotating frame (508); a counterweight (510) disposed at one end of the first connecting rod (509); a second damping ring (511) disposed on the rotating cylinder (3); a second rotating frame (512) rotatably disposed on the second damping ring (511), and the second rotating frame (512) is rotatably connected to the rotating cylinder (3); a second connecting rod (513) rotatably disposed on the second rotating frame (512), and one end of the second connecting rod (513) is rotatably connected to the first connecting rod (509).

7. The welding device for a building steel structure node according to claim 6, characterized in that, The mobile smoothing unit (5) further includes: a tapered thread knob (514), a tapered thread groove is formed at one end of the second connecting rod (513), and the tapered thread knob (514) is disposed in the tapered thread groove; rubber strips (515) annularly distributed on the tapered thread groove of the second connecting rod (513), one side of the rubber strips (515) contacts the first connecting rod (509), and the rubber strips (515) are press-fitted with the tapered thread knob (514).

8. A welding device for a building steel structure joint according to claim 1, characterized in that the support The auxiliary unit (7) includes: a support sleeve (701) disposed on the gooseneck tube (6); curved rods (702) symmetrically distributed on the support sleeve (701); a torsion spring (703) with one end disposed on the curved rod (702) and the other end fixedly connected to the support sleeve (701); a flexible rotating rod (704) disposed on the symmetrically distributed curved rods (702).

9. The welding device for a building steel structure node according to claim 8, characterized in that, The support auxiliary unit (7) further includes: universal balls (705) vertically distributed on the curved rods (702).

10. A welding device for a building steel structure node according to claim 8, characterized in that, The support auxiliary unit (7) further includes: a clamping post (706), a cylindrical groove (7011) is formed on the support sleeve (701), the clamping post (706) is slidably disposed in the cylindrical groove (7011), and a spherical groove (7021) capable of cooperating with the clamping post (706) is formed on the curved rod (702); a third spring (707) disposed between the clamping post (706) and the cylindrical groove (7011).

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