A crane accessory welding device

Abstract

The present application relates to welding device technical field, specifically propose a kind of crane accessory welding device, including surface assembly with welding torch's semi-enclosed protective cover, the both sides of the protective cover are provided with the through slot for providing welding slag to pass, the position of the one side of the protective cover higher than through slot is provided with feed inlet, the position of the feed inlet is equipped with the suction tube of negative pressure;The present application is rotatable by the combination of protective cover and sealing straight plate, sealing arc plate and sealing angle plate, can always keep a self-adapting, conforming dynamic closed space with workpiece surface during welding torch movement, the design can effectively block welding agent to slide on various inclination and curvature groove, ensure that electric arc and molten pool are always under the sufficient coverage and protection of welding agent, while the whole environment is in relatively sealed state, can effectively solve the defects such as porosity, slag inclusion and arc drift caused by incomplete coverage of welding agent, make that weld forming is beautiful, internal quality is stable and reliable.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and specifically proposes a welding device for crane accessories. Background Technology

[0002] As an important heavy material handling equipment, cranes generally use medium-thick steel plates to weld their structural components, such as box-type main beams, end beams, saddle beams, and various reinforcing ribs. These components are not only large in size, but more importantly, they directly bear the dynamic and static loads of the hoisting loads. Their welding quality directly determines the structural strength, safety performance, and service life of the entire machine. At present, in the welding and manufacturing of crane components, submerged arc welding has become the preferred process for welding main welds (such as longitudinal seams of main beams and fillet welds of stiffening ribs) due to its outstanding advantages such as high deposition efficiency, good weld quality, and high degree of automation.

[0003] In actual production, traditional submerged arc welding technology still faces severe challenges, especially when welding fillet welds: 1. There are a large number of stiffening plates perpendicular to the web inside the crane box girder, forming dense T-shaped fillet welds. When welding these vertical fillet welds, the flux is difficult to accumulate effectively at the welding torch head due to gravity and is very easy to slip off from the weld bevel. The open working environment is unstable, which will lead to poor arc and molten pool protection and easily produce defects such as porosity, slag inclusion, and lack of fusion.

[0004] 2. Crane accessories have complex structures and diverse weld seam forms, including not only straight weld seams, but also weld seams in curved plates (such as saddle beams) and triangular areas (such as the ends of stiffener plates). Traditional submerged arc welding guns lack effective flux limiting mechanisms, and special baffles need to be frequently replaced when switching between different weld seams.

[0005] 3. To prevent flux from slipping, operators often apply large amounts of flux in advance, resulting in huge flux waste and increased welding costs.

[0006] Therefore, there is an urgent need for a device for welding crane parts that can effectively ensure the welding quality of submerged arc welding in complex fillet welds, adapt to the varied weld forms of crane parts, and effectively reduce welding costs. Summary of the Invention

[0007] To address the aforementioned problems, the present invention provides a crane accessory welding device, which solves the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention employs the following technical solution: a crane accessory welding device, comprising a semi-enclosed protective cover with a welding torch mounted on its surface; through grooves on both sides of the protective cover for allowing welding slag to pass through; a feed inlet on one side of the protective cover, positioned above the through grooves, with a negative pressure suction pipe mounted at the feed inlet; an inclined baffle plate mounted inside the protective cover; a sealing straight plate slidably mounted on the surface of the protective cover for abutting against the surface of a vertical welding plate; and a sealing arc plate slidably mounted inside the sealing straight plate for abutting against the surface of an arc-shaped welding plate. The protective cover is equipped with a sealing angle plate for abutting against the surface of the triangular welding plate. The protective cover has three operating modes: Mode 1, Mode 2, and Mode 3. When the protective cover operates on the vertical welding plate in Mode 1, the sealing straight plate moves and abuts against the surface of the vertical welding plate to form a sealed welding environment. When the protective cover operates on the arc-shaped welding plate in Mode 2, the sealing straight plate and the sealing arc plate move in opposite directions, and the sealing arc plate abuts against the surface of the arc-shaped welding plate to form a sealed space. When the protective cover operates on the triangular welding plate in Mode 3, the sealing arc plate moves into the interior of the sealing straight plate, and the rotating sealing angle plate abuts against the surface of the triangular welding plate to form a sealed space.

[0009] Preferably, the surface of the protective cover is fitted with a fixing frame, and the surface of the fixing frame is fitted with a double-ended threaded rod through a bearing. The surfaces of the sealing straight plate and the sealing arc plate are fixedly connected with fixing plates, and the threaded rod is threaded through the two fixing plates.

[0010] Preferably, mounting plates are rotatably mounted on both sides of the sealing straight plate, the mounting plates are fixed to the surface of the sealing corner plate, and transverse grooves are formed on the surfaces of the sealing corner plate and the sealing straight plate at the connection position.

[0011] Preferably, the interior of the transverse groove is fitted with an installation rod, the surface of which abuts against the surfaces of the sealing angle plate and the sealing straight plate, respectively.

[0012] Preferably, a U-shaped handle is installed on the surface of the sealing plate via a hinge, a threaded post is threaded onto the surface of the U-shaped handle, the mounting rod is movably mounted on the surface of the threaded post via a bearing, one end of the U-shaped handle is fixedly mounted on the surface of the sealing angle plate, and the mounting plate is a telescopic plate.

[0013] Preferably, the top of the protective cover is provided with a T-shaped guide groove, and a T-shaped guide block is fixedly installed on the surface of the sealing plate, the guide block being movably installed inside the guide groove.

[0014] Preferably, the protective cover is equipped with rotating cylinders at both ends, and the rotating cylinders rotate and abut against the surface of the vertical welding plate, the arc-shaped welding plate or the triangular welding plate.

[0015] Preferably, the surface of the protective cover is rotatably fitted with a spherical mounting bracket, and the welding torch tip is fitted inside the mounting bracket.

[0016] The above technical solution has the following advantages or beneficial effects: 1. The present invention provides a welding device for crane accessories. Through the combination of a rotatable protective cover and a sealing straight plate, a sealing arc plate and a sealing corner plate, during the movement of the welding torch, it can always maintain an adaptive and close dynamic closed space with the workpiece surface. This design can effectively prevent the flux from sliding on bevels of various inclinations and curvatures, ensuring that the arc and molten pool are always fully covered and protected by the flux. At the same time, the entire environment is in a relatively sealed state, which can effectively solve the defects such as porosity, slag inclusion and arc drift caused by incomplete flux coverage, so that the weld is beautiful and the internal quality is stable and reliable.

[0017] 2. This invention provides a welding device for crane accessories. By setting a sealing straight plate, a sealing arc plate and a sealing corner plate, it overcomes the drawback of the need for frequent replacement of traditional fixed baffles. When switching between different workpieces and different welds, there is no need to change tooling, which greatly reduces auxiliary time and improves the overall efficiency of the production line.

[0018] 3. This invention provides a welding device for crane accessories. By setting up an inlet and a suction pipe, the submerged arc welding material is effectively confined within the welding area, avoiding unnecessary scattering and loss of the submerged arc welding material. During the welding process, excess submerged arc welding material is simultaneously recycled, reducing the cost of submerged arc welding and achieving efficient utilization of submerged arc welding material. Attached Figure Description

[0019] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings, which are not intentionally drawn to scale; the focus is on illustrating the spirit of the invention.

[0020] Figure 1 This is a three-dimensional structural diagram of a crane accessory welding device provided by the present invention, showing the welding state of a straight plate weld corner.

[0021] Figure 2 yes Figure 1 A three-dimensional structural diagram of the protective cover's location.

[0022] Figure 3 This is a three-dimensional structural diagram of a crane accessory welding device provided by the present invention, showing the welding state of an arc plate weld corner.

[0023] Figure 4 yes Figure 3 A three-dimensional structural diagram of the protective cover's location.

[0024] Figure 5 This is a three-dimensional structural diagram of a crane accessory welding device provided by the present invention, showing the welding state of a triangular weld corner.

[0025] Figure 6 yes Figure 5 A three-dimensional structural diagram of the protective cover's location.

[0026] Figure 7 This is a three-dimensional structural diagram of the installation of the sealing corner plate and the sealing straight plate.

[0027] Figure 8 This is a three-dimensional structural diagram of the guide block position.

[0028] In the diagram: 1. Protective cover; 2. Through groove; 3. Feed inlet; 4. Suction pipe; 5. Baffle plate; 6. Sealing straight plate; 7. Sealing arc plate; 8. Sealing corner plate; 9. Fixing bracket; 10. Threaded rod; 11. Mounting plate; 12. Horizontal groove; 13. Mounting rod; 14. U-shaped handle; 15. Threaded column; 16. Guide rail groove; 17. Guide block; 18. Rotary drum; 19. Mounting bracket; 20. Fixing plate. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Figure 1 A welding device for crane accessories is disclosed, mainly including a submerged arc welding machine body (not shown in the figure) and a protective cover 1. A mounting bracket 19 is fixedly installed on the surface of the gun barrel of the submerged arc welding machine body. In this embodiment, the mounting bracket 19 is set as a spherical shape and is spherically hinged to be installed inside the protective cover 1. When the submerged arc welding machine performs submerged arc welding on the welding position, the mounting bracket 19 can provide stable support force for the end of the welding machine. Especially for welding in deeper internal positions, in order to facilitate the placement of the welding gun head inside, the length of the welding gun barrel of the welding machine will increase. At this time, due to the cantilever beam effect, the end welding position is unstable. The support force provided by the mounting bracket 19 can effectively counteract the cantilever beam effect and ensure the welding effect.

[0032] like Figures 1-2As shown, the protective cover 1 rests directly against the crane's accessories during use. Since the submerged arc welding material needs to accumulate at the weld joint during submerged arc welding, through slots 2 are provided on both sides of the protective cover 1 to prevent the movement of the protective cover 1 from affecting the submerged arc material. When the protective cover 1 moves with the welding machine, the submerged arc slag will pass through the through slots 2. To avoid waste of submerged arc material and reduce costs, a feed inlet 3 is provided on one side of the protective cover 1. The height of the feed inlet 3 is higher than the height of the through slots 2. It should be noted that the position of the feed inlet 3 is opposite to the direction of movement of the protective cover 1. During the movement of the protective cover 1, the part of the submerged arc material that has not become submerged arc slag will gradually accumulate on one side of the feed inlet 3 of the protective cover 1. When the accumulation height reaches the position of the feed inlet 3, it will flow out, thereby realizing the timely recycling of the submerged arc material and reducing the cost of submerged arc welding.

[0033] To facilitate stable recycling of submerged arc welding material, a negative pressure suction pipe 4 is installed at the feed inlet 3. The suction pipe 4 can be connected by a threaded connection for easy disassembly and replacement. The negative pressure of the suction pipe 4 is achieved by an electric fan (not shown in the figure), similar to a vacuum cleaner. Due to its large volume and weight, the portion of the submerged arc welding slag remains at the welding position, while the remaining submerged arc welding material, due to its small volume and weight, is recycled and reused by the suction pipe 4 through the feed inlet 3. This maximizes the recycling of submerged arc welding material.

[0034] In this embodiment, the protective cover 1 is C-shaped, and a baffle plate 5 is fixedly installed inside the protective cover 1. The lower end of the baffle plate 5 is close to the weld. When the submerged arc welding material is laid at the weld position, the submerged arc welding material will slide down and abut against the surface of the baffle plate 5. At this time, the amount of submerged arc welding material required will be less, thereby reducing the cost of submerged arc welding.

[0035] To create a relatively sealed working environment, the welding arc of the welding machine is located in a confined and uniform cavity, ensuring that the arc can burn the welding material more stably and improve the welding quality of the weld. The top of the protective cover 1 forms a relatively sealed environment. Due to the complex structure of the crane accessories and the variety of weld forms, it includes not only straight welds, but also welds on curved plates (such as saddle beams) and triangular areas (such as the ends of stiffeners).

[0036] like Figures 1-2 and Figures 6-7As shown, for welding vertical welding plates, the top of the protective cover 1 has two symmetrically arranged guide rail grooves 16. The cross-section of the guide rail groove 16 is T-shaped. A strip-shaped guide block 17 is slidably installed inside the guide rail groove 16. The shape of the guide block 17 is adapted to the inner wall shape of the guide rail groove 16. A sealing straight plate 6 is slidably installed on the top of the protective cover 1. The guide block 17 is installed on the surface of the sealing straight plate 6. A fixing frame 9 is fixedly installed on the surface of the protective cover 1. The fixing frame 9 is L-shaped. A threaded rod 10 is rotatably installed on the surface of the fixing frame 9. A bearing (not shown in the figure) is interference-fitted onto the surface of the threaded rod 10. The bearing is interference-fitted into the inside of the fixing frame 9. The threaded rod 10 threads through the surface of the sealing straight plate 6.

[0037] The position of the sealing straight plate 6 can be adjusted by rotating the threaded rod 10, so that the straight edge of the sealing straight plate 6 abuts against the surface of the vertical welding plate. When the welding machine welds the weld, the protective cover 1 and the sealing straight plate 6 form a relatively sealed and stable working environment, effectively isolating the welding environment and greatly reducing the generation of porosity and oxide inclusions, thereby ensuring the quality of welding.

[0038] like Figures 3-4 As shown, for welding arc-shaped welding plates, the interior of the sealing straight plate 6 is hollow, and the sealing arc plate 7 is slidably installed inside the sealing straight plate 6. It should be noted that the arc surface of the sealing arc plate 7 is adapted to the arc surface of the arc plate. Fixing plates 20 are fixedly installed on the surfaces of the sealing arc plate 7 and the sealing straight plate 6. The two ends of the threaded rod 10 have different thread directions, and different threaded sections of the threaded rod 10 pass through the two fixing plates 20 respectively. When the threaded rod 10 is rotated in the forward direction, the sealing straight plate 6 moves away from the welding plate, and the sealing arc plate 7 moves closer to the welding plate. At this time, the arc-shaped edge of the sealing arc plate 7 abuts against the surface of the arc-shaped welding plate. When the welding machine welds the weld, the protective cover 1 and the sealing arc plate 7 form a relatively sealed and stable working environment, effectively isolating the welding environment and greatly reducing the generation of porosity and oxide inclusions, thereby ensuring the quality of welding.

[0039] like Figures 5-8 As shown, for welding triangular welding plates, a sealing angle plate 8 is rotatably mounted on the surface of the sealing straight plate 6. Telescopic mounting plates 11 are mounted on both sides of the sealing straight plate 6. One end of the mounting plate 11 is rotatably mounted on the surface of the sealing straight plate 6, and the other end is fixedly mounted on the surface of the sealing angle plate 8. A U-shaped handle 14 is installed between the sealing straight plate 6 and the sealing angle plate 8. One end of the U-shaped handle 14 is fixedly mounted via a hinge, and the other end is fixedly mounted on the surface of the sealing angle plate 8. A transverse groove 12 is provided on the surface of the connection between the sealing angle plate 8 and the sealing straight plate 6. An mounting rod 13 is installed inside the transverse groove 12. Both sides of the mounting rod 13 abut against the surfaces of the sealing straight plate 6 and the sealing angle plate 8. A threaded post 15 is threaded onto the surface of the U-shaped handle 14. A bearing second (not shown in the figure) is interference-fitted onto the end of the threaded post 15 and interference-fitted onto the surface of the mounting rod 13.

[0040] Rotate the threaded rod 10 in the opposite direction, bringing the sealing straight plate 6 closer to the welding plate and the sealing arc plate 7 away from the welding plate. Hold the U-shaped handle 14 and then rotate the sealing angle plate 8 so that the sealing angle plate 8 and the sealing straight plate 6 are in a horizontal state. Then rotate the threaded column 15 so that the mounting rod 13 is stuck inside the transverse groove 12. At this time, the sealing angle plate 8 is stuck and difficult to rotate. The corner edge of the sealing angle plate 8 abuts against the surface of the triangular welding plate. When the welding machine welds the weld seam, the protective cover 1, the sealing straight plate 6 and the sealing angle plate 8 form a relatively sealed and stable working environment, effectively isolating the welding environment and greatly reducing the generation of porosity and oxide inclusions, thereby ensuring the quality of welding.

[0041] Since the protective cover 1 needs to move with the welding machine, rotating drums 18 are installed at both ends of the protective cover 1. When the protective cover 1 moves, the rotating drums 18 move against the surface of the welding plate, which can effectively reduce friction and reduce wear on the crane accessories.

[0042] It should be noted that while existing welding torches also have baffle structures, these baffles are fixed. Although they do prevent the submerged arc welding material from slipping, the fixed nature of the baffles sometimes restricts welding and increases the weight of the torch head. In this invention, however, the protective cover 1 is rotatably mounted on the welding torch head of the welding machine. The protective cover 1 rests against the surface of the welding plate, and together with the top sealing straight plate 6, sealing arc plate 7, and sealing corner plate 8, the welding environment is sealed and stable, effectively improving the weld quality. Additionally, a suction pipe 4 is added to simultaneously recover the submerged arc welding material, reducing the cost of submerged arc welding. Furthermore, although this invention adds the sealing straight plate 6, sealing arc plate 7, and sealing corner plate 8 compared to existing technologies, these are all conventional mechanical structures without any high-cost precision parts. Therefore, the cost of adding these structures is low, but the effective improvement in weld quality and reduction in the use of submerged arc welding material makes the cost negligible. The technical solution of this invention is entirely based on the existing technology and addresses the technical problems with improved characteristics.

[0043] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0044] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a manner common to the art; any possible variations and modifications made by those skilled in the art without departing from the technical solution of the present invention, or equivalent embodiments with equivalent changes, do not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A crane accessory welding apparatus, characterized by: The utility model provides a welding protection cover, which comprises a semi-closed protection cover with a welding gun mounted on the surface of the protection cover, two sides of the protection cover are provided with through grooves for providing slag passing, a feeding port is provided on one side of the protection cover higher than the position of the through groove, and a negative pressure suction pipe is mounted on the position of the feeding port. An inclined material blocking plate is mounted in the protection cover. A sealing straight plate is slidably mounted on the surface of the protection cover and used for abutting against the surface of a vertical welding plate, a sealing arc plate is slidably mounted in the sealing straight plate and used for abutting against the surface of an arc-shaped welding plate, and a sealing angle plate is rotatably mounted on the surface of the sealing straight plate and used for abutting against the surface of a triangular welding plate. The protection cover has three operation modes, i.e., mode one, mode two and mode three, when the protection cover is used for mode one operation on a vertical welding plate, the sealing straight plate moves to abut against the surface of the vertical welding plate to form a sealed welding environment, when the protection cover is used for mode two operation on an arc-shaped welding plate, the sealing straight plate and the sealing arc plate move in opposite directions, and the sealing arc plate abuts against the surface of the arc-shaped welding plate to form a sealed space, and when the protection cover is used for mode three operation on a triangular welding plate, the sealing arc plate moves to the inside of the sealing straight plate, and the sealing angle plate is rotated to abut against the surface of the triangular welding plate to form a sealed space. A fixing frame is mounted on the surface of the protection cover, a double-headed threaded rod is mounted on the surface of the fixing frame through a bearing one, and the surfaces of the sealing straight plate and the sealing arc plate are fixedly connected with fixing plates.

2. A crane accessory welding apparatus as claimed in claim 1, characterised in that: Two mounting plates are rotatably mounted on the two sides of the sealing straight plate, the mounting plates are fixed on the surface of the sealing angle plate, and the surfaces of the connection positions of the sealing angle plate and the sealing straight plate are provided with horizontal grooves.

3. A crane accessory welding apparatus as claimed in claim 2, characterised in that: An installation rod is mounted in the horizontal groove, and the surface of the installation rod abuts against the surfaces of the sealing angle plate and the sealing straight plate.

4. A crane accessory welding apparatus as claimed in claim 3, characterised in that: A U-shaped handle is hingedly mounted on the surface of the sealing straight plate, a threaded column is threadedly mounted on the surface of the U-shaped handle, the installation rod is movably mounted on the surface of the threaded column through a bearing two, one end of the U-shaped handle is fixedly mounted on the surface of the sealing angle plate, and the mounting plate is an extensible plate.

5. A crane accessory welding apparatus as claimed in claim 1, wherein: A T-shaped guide rail groove is formed in the top of the protection cover, a T-shaped guide block is fixedly mounted on the surface of the sealing straight plate, and the guide block is movably mounted in the guide rail groove.

6. A crane accessory welding apparatus as defined in claim 1, wherein: Rotary drums are mounted at the two ends of the protection cover and used for abutting against the surfaces of the vertical welding plate, the arc-shaped welding plate or the triangular welding plate.

7. A crane accessory welding apparatus as defined in claim 1, wherein: A spherical mounting frame is rotatably mounted on the surface of the protection cover, and the head of the welding gun is mounted in the mounting frame.

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