Middle trough welding preheating device

Abstract

The utility model provides a middle trough welding preheating device which comprises a horizontal track arranged below a middle trough welding station, a transverse walking frame is arranged on the horizontal track in a sliding mode, a height walking frame driven by a lifting driving mechanism to ascend and descend is arranged on the transverse walking frame, and an installation piece is arranged on the height walking frame. And at least two nozzles or spray guns with upward openings are arranged on each mounting piece. The mounting piece is a hollow gas pipeline, and the side face of the mounting piece is provided with a connector communicated with an inner cavity of the mounting piece; a middle connecting piece is fixedly arranged at the connector, the lower end of the middle connecting piece is inserted into the connector and welded to the mounting piece, the middle connecting piece is detachably connected with the nozzle or the spray gun in a threaded fit mode, and a through hole is formed in the middle connecting piece; and a connector connected with a hose is arranged on the mounting piece. The middle groove preheating device improves preheating efficiency and can be more suitable for preheating large-size and thick-size middle grooves.

Description

Technical Field

[0001] The utility model belongs to the field of middle groove processing, and in particular relates to a middle groove welding preheating device. Background Art

[0002] The center trough is a key component of a mining scraper conveyor. It serves two primary functions: transporting coal mined by the shearer to the roadway and providing a running track and supporting the shearer's weight. The center trough is primarily a cast-welded structure, consisting of a shovel trough side, a center plate, a bottom plate, and a bent plate assembly. The shovel trough side is made of ZG30SiMn, while the center bottom plate is wear-resistant plate. These materials have a high carbon equivalent and poor weldability, requiring a specific welding temperature. Failure to achieve this temperature can lead to weld cracks and failures. In existing preheating methods, the manual preheating flame gun oscillates unevenly, easily causing uneven preheating and affecting welding performance. Preheating in a resistance furnace requires hoisting the trough into the furnace, requiring parts to be transported back and forth, consuming labor, electricity, and equipment, making it extremely uneconomical for individual parts. Furthermore, neither of these existing preheating methods is convenient for direct preheating at a robotic welding station, making them poorly compatible with automated center trough welding lines. The emerging automatic preheating system for the middle tank has a high degree of automation in temperature control, detection, and position tracking and movement, and has high production efficiency, such as the structure in patent CN218095935. However, the preheating device and welding are not combined in the patent. In the process from preheating to welding station, especially in the cold winter in the north, there will be temperature loss during transportation, which may lead to insufficient temperature during welding and require manual heating. Patents CN210549008U and CN207577729U provide a system combining preheating and welding, but these two structures are relatively expensive, and the structure determines that there are few preheating heads that can be set, and the preheating power is insufficient. The preheating range is small, and the preheating head needs to be moved back and forth to preheat the entire middle tank, which has low heating efficiency. Summary of the Invention

[0003] The utility model provides a middle slot preheating welding device.

[0004] The purpose of the present utility model is achieved in the following way: a middle groove welding preheating device includes a horizontal track arranged below the middle groove welding station, a horizontal traveling frame is slidably arranged on the horizontal track, a height traveling frame driven by a lifting drive mechanism is arranged on the horizontal traveling frame, at least one mounting member is arranged on the height traveling frame, and each of the mounting members is provided with at least two nozzles or spray guns with openings facing upwards.

[0005] The mounting part is a hollow gas pipe, and an interface communicating with its own internal cavity is provided on the side of the mounting part; an intermediate connecting part is fixedly provided at the interface, the lower end of the intermediate connecting part is inserted into the interface and welded to the mounting part, the upper end of the intermediate connecting part is provided with an external thread and is detachably connected to the nozzle or spray gun through threaded fitting, and the intermediate connecting part is provided with a through hole running through the upper and lower parts; an interface for connecting a hose is also provided on the mounting part.

[0006] A top plate is provided on the upper portion of the height walking frame, and a circular open mounting groove is provided on the top plate corresponding to the position of each mounting member, the mounting member is rotatably provided in the open mounting groove, and a pressure plate for pressing the mounting member is detachably provided at the opening of the open mounting groove.

[0007] Two mounting parts are arranged on the height traveling frame, and each mounting part is located below the weld of the middle groove; a positioner for driving the middle groove to flip is arranged on the middle groove welding station.

[0008] The lifting drive mechanism is a lifting cylinder, a base plate is provided at the lower part of the height traveling frame, and the lifting drive mechanism is provided between the transverse traveling frame and the base plate; at least one guide mechanism is provided on the left and right opposite sides of the height traveling frame respectively, and the guide mechanism includes a guide mounting part on the height traveling frame and a V-shaped guide wheel rotatably provided on the guide mounting part; a V-shaped guide surface is provided on the transverse traveling frame at a position corresponding to the V-shaped guide wheel; and the guide mechanism is slidably provided on the guide surface.

[0009] A chassis is arranged on the bottom surface below the welding station, the horizontal track is fixedly arranged on the chassis, and a walking wheel is rotatably arranged on the lower end of the transverse walking frame, and the walking wheel is rollingly arranged on the horizontal track.

[0010] Compared to the prior art, the present invention utilizes a horizontal traveling frame to move the mounting member horizontally away from the bottom of the central groove welding station. This allows for timely clearance during the movement and rotation of the central groove. A height traveling frame can also raise and lower the mounting member to adjust the height of the nozzle or spray gun. The use of multiple mounting members and multiple nozzles or spray guns allows for simultaneous and effective heating of the central groove weld, improving preheating efficiency and making it more suitable for preheating large and thick central grooves. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structure and positioner of the utility model (the nozzle is omitted).

[0012] Figure 2 It is an enlarged view of the structure of the utility model.

[0013] Figure 3 This is an enlarged view of the guide mechanism.

[0014] Figure 4 This is a schematic diagram of the installation parts (nozzle omitted).

[0015] Figure 5 Schematic diagram of the mounting parts and pressure plate.

[0016] Figure 6 It is a schematic diagram of the pressure plate.

[0017] Figure 7 It is a schematic diagram of the intermediate connecting parts.

[0018] Among them, 1 is the base frame, 2 is the horizontal track, 3 is the horizontal walking frame, 30 is the V-shaped guide surface, 4 is the lifting drive mechanism, 5 is the height walking frame, 50 is the top plate, 51 is the open mounting groove, 52 is the bottom plate, 53 is the V-shaped guide wheel, 6 is the mounting part, 7 is the middle connecting part, 8 is the pressure plate, 9 is the positioner, and 10 is the middle groove. DETAILED DESCRIPTION

[0019] In this utility model, unless otherwise specified or limited, the technical terms used herein shall have the ordinary meanings understood by persons skilled in the art to which this utility model relates. Terms such as "connected," "connected," "fixed," and "disposed" should be interpreted broadly and may refer to fixed, removable, or integral connections; direct or indirect connections through an intermediary; and mechanical or electrical connections. Unless otherwise specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact or indirect contact through an intermediary. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature. Relational terms such as first and second are used solely to distinguish one entity or operation from another and do not necessarily require or imply any actual relationship or order between these entities or operations. The terms used in the description, such as "center", "transverse", "longitudinal", "length", "width", "thickness", "height", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "clockwise", "counterclockwise", etc., to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation.

[0020] The following will combine the accompanying drawings and specific embodiments to clearly and completely describe the technical solution of the present invention. Figure 1-7 As shown, a mid-tank welding preheating device comprises a horizontal track 2 positioned below a mid-tank 10 welding station. A transverse traveling frame 3 is slidably mounted on the horizontal track 2. A height traveling frame 5 is mounted on the transverse traveling frame 3, which is elevated by a lifting drive mechanism 4. The height traveling frame 5 is provided with at least one mounting member 6, each of which is provided with at least two upward-opening nozzles or spray guns. The nozzles or spray guns are connected to a hose connected to a combustible gas source for heating. The combustible gas ejected from the nozzles or spray guns ignites and generates heat. The nozzles and spray guns are prior art and will not be described in detail; existing structures may be employed. In the present invention, the transverse traveling frame 3 drives the mounting members 6 to move horizontally away from the mid-tank 10 welding station. This allows for timely clearance during movement and reversal of the mid-tank 10. The height traveling frame 5 drives the mounting members 6 to be raised and lowered to adjust the height of the nozzles or spray guns, maintaining a suitable distance between the nozzles and the mid-tank weld. The provision of multiple mounting members 6 and multiple nozzles or spray guns can effectively heat the weld of the middle groove 10 at the same time, thereby improving the preheating efficiency and being more adaptable to the preheating of the middle groove 10 with large and thick dimensions.

[0021] The mounting member 6 is a hollow gas pipe with a side interface that connects to its internal cavity. An intermediate connector 7 is fixed to the interface. The lower end of the intermediate connector 7 is inserted into the interface and welded to the mounting member 6. The upper end of the intermediate connector 7 is provided with external threads that detachably connect to the nozzle or spray gun through threaded engagement. The intermediate connector 7 is provided with a through hole extending from top to bottom. The mounting member 6 also has an interface for connecting a hose. The hose's connecting end is provided with an externally threaded connector that connects the mounting member 6 to the hose through a threaded connection. Preferably, the interface is located at one end of the gas pipe where the mounting member 6 is located. The mounting member 6 can be circular, rectangular, or other shapes. The specific structure of the nozzle or spray gun is not shown in the accompanying drawings; existing structures are sufficient. In the present invention, multiple nozzles or spray guns can be mounted on the same mounting member 6 to share a single gas pipe, resulting in a simpler structure. The nozzles or spray guns can be detachably connected to the intermediate connector 7, facilitating installation and replacement. The nozzles and spray guns can be commercially available. Alternatively, the mounting member 6 and the nozzle can be integrated. The nozzle and mounting member 6 can be integrally formed, with a channel provided on the mounting member 6 corresponding to the nozzle position, and the two welded together. In the present invention, the mounting member 6 can also simply be a structure that fixes the nozzle or spray gun to the height travel frame 5 and moves with the height travel frame 5. In this case, the bottom of the nozzle or spray gun is directly connected to a hose. Such arrangements are within the scope of protection of the present invention.

[0022] A top plate 50 is positioned above the height travel frame 5. A circular opening 51 is provided on the top plate 50, corresponding to the position of each mounting member 6. The mounting member 6 is rotatably mounted in the opening 51. A removable pressure plate 8 is provided at the opening of the opening 51 to hold the mounting member 6 in place. The opening of the opening 51 can be located at the top or the side. The opening 51 is preferably circular, facilitating rotational adjustment and securing the mounting member 6 after rotation. The pressure plate 8 can be bolted to the sidewalls of the opening 51 and tightened. To adjust the angle of the mounting member 6, remove the pressure plate 8 and rotate the mounting member 6. Once adjusted, tighten the mounting member 6 with the pressure plate 8. The mounting member 6 is fixed to the top plate 50 via the opening 51 and the pressure plate 8, and its angle can be adjusted to accommodate the position of the weld seam of the middle groove 10 of varying sizes. Rotation of the mounting member 6 drives the nozzle or spray gun mounted thereon to rotate, thereby adjusting the heating angle of the nozzle or spray gun according to the shape and size of the middle groove 10. In addition, the height direction can be moved, thereby ensuring the best preheating energy utilization rate and being suitable for different series of middle tanks 10. Preferably, the cross section of the mounting member 6 is circular for easy rotation. Of course, other shapes are also possible as long as the angle can be rotated and adjusted.

[0023] Two mounting parts 6 are provided on the height traveling frame 5, and each mounting part 6 is located below the weld of the middle groove 10; a positioner 9 is provided on the welding station of the middle groove 10 to drive the middle groove 10 to flip. After the middle groove 10 is clamped by the positioner 9, it is first preheated before welding. After the preheating temperature is reached, the transverse traveling frame 3 is removed, and the positioner 9 drives the middle groove 10 to flip, and the preheated surface is flipped to the top for welding. Then the transverse traveling frame 3 and the nozzle are moved back to the bottom of the middle groove 10 to preheat the other side. After the preheating is completed, the transverse traveling frame 3 is moved again and the preheated surface is flipped for welding. In the utility model, the preheating and welding of both sides of the middle groove 10 are completed by one clamping, which improves the welding efficiency of the middle groove 10. Preferably, three nozzles or spray guns can be set on each mounting frame, and preheated at the same time to improve the preheating efficiency.

[0024] The lifting drive mechanism 4 is a lifting cylinder. A base plate 52 is provided at the bottom of the height traveling frame 5. The lifting drive mechanism 4 is provided between the transverse traveling frame 3 and the base plate 52. At least one guide mechanism is provided on the left and right opposite sides of the height traveling frame 5. The guide mechanism includes a guide mounting member 6 on the height traveling frame 5 and a V-shaped guide wheel 53 rotatably provided on the guide mounting member 6. A V-shaped guide surface 30 is provided at a position corresponding to the V-shaped guide wheel 53 on the transverse traveling frame 3. The guide mechanism is slidably provided on the guide surface. The V-shaped guide wheel 53 includes two coaxial large wheels with a connecting shaft in the middle. The adjacent surfaces of the two large wheels are tilted to form a V-shaped surface. The guide mechanism is provided to ensure that the horizontal position of the height traveling frame 5 does not change during the lifting process, thereby ensuring the efficiency of nozzle preheating.

[0025] A base frame 1 is provided on the ground or bottom surface below the welding station, the horizontal track 2 is fixedly provided on the base frame 1, and running wheels are rotatably provided at the lower end of the transverse walking frame 3, and the running wheels are rollingly provided on the horizontal track 2. The running wheels and the track are matched to avoid falling off. The transverse walking frame 3 can be pulled manually or driven by a translation drive mechanism. For example, the horizontal drive mechanism is a motor, and the motor drives the gears provided on the base frame 1 to rotate, and a chain structure is provided on the gears. The transverse walking frame 3 and the chain are fixed. The running wheels of the transverse walking frame 3 are pulled to move or roll on the horizontal track 2 by the movement of the chain. It can also be other horizontal drive mechanisms, such as those driven by air cylinders or oil cylinders. The horizontal drive mechanism is an existing conventional technical means and will not be described in detail.

[0026] During specific implementation: clamp the middle trough 10 on the positioner 9, and move the transverse traveling frame 3 to the bottom of the middle trough 10. The lifting drive mechanism 4 is started to drive the height traveling frame 5 to move upward until the nozzle reaches the predetermined position. After adjusting the height and angle of the nozzle, the weld position on the lower surface of the middle trough 10 is preheated before welding. After the preheating temperature is reached, remove the transverse traveling frame 3, and the positioner 9 drives the middle trough 10 to flip, and flip the preheated surface to the top for welding. Then move the transverse traveling frame 3 and the nozzle back to the bottom of the middle trough 10 to preheat the other side. After the preheating is completed, move the transverse traveling frame 3 again and flip the preheated surface for welding.

[0027] The technical features of the above-described embodiments may be combined in any manner, and as long as there are no contradictions in the combination of these technical features, they shall be deemed to be within the scope of this specification. Without departing from the overall concept of the present invention, the technical solutions of the present invention, their equivalent replacements or modifications, and certain changes and improvements made thereto shall also be deemed to be within the scope of protection of the present invention.

Claims

1. A mid-slot welding preheating device, characterized in that: It includes a horizontal track arranged below the middle groove welding station, a transverse traveling frame is slidably arranged on the horizontal track, a height traveling frame driven by a lifting drive mechanism is arranged on the transverse traveling frame, at least one mounting part is arranged on the height traveling frame, and each of the mounting parts is provided with at least two nozzles or spray guns opening upward.

2. A mid-slot welding preheating device according to claim 1, characterized in that: The mounting piece is a hollow gas pipeline, and an interface connected to the internal cavity of the mounting piece is arranged on the side of the mounting piece; an intermediate connecting piece is fixedly arranged at the interface, the lower end of the intermediate connecting piece is inserted into the interface and welded to the mounting piece, the upper end of the intermediate connecting piece is provided with an external thread and is detachably connected to the nozzle or spray gun through threaded cooperation, and the intermediate connecting piece is provided with a through hole penetrating from top to bottom; the mounting piece is also provided with an interface for connecting a hose.

3. A mid-slot welding preheating device according to claim 2, characterized in that: A top plate is arranged on the upper part of the height walking frame, and a circular open mounting groove is arranged on the top plate corresponding to the position of each mounting member, and the mounting member is rotatably arranged in the open mounting groove, and a pressure plate for clamping the mounting member can be detachably arranged at the opening of the open mounting groove.

4. A mid-slot welding preheating device according to claim 2, characterized in that: Two mounting parts are arranged on the height traveling frame, and each mounting part is located below the middle groove weld; a positioner for driving the middle groove to flip is arranged on the middle groove welding station.

5. A mid-slot welding preheating device according to any one of claims 1 to 4, characterized in that: The lifting drive mechanism is a lifting cylinder, a base plate is arranged at the lower part of the height traveling frame, and the lifting drive mechanism is arranged between the transverse traveling frame and the base plate; at least one guide mechanism is respectively arranged on the left and right opposite sides of the height traveling frame, and the guide mechanism includes a guide mounting part on the height traveling frame and a V-shaped guide wheel rotatably arranged on the guide mounting part; a V-shaped guide surface is arranged at a position corresponding to the V-shaped guide wheel on the transverse traveling frame; and the guide mechanism is slidably arranged on the guide surface.

6. A mid-slot welding preheating device according to claim 5, characterized in that: A base frame is arranged on the bottom surface below the welding station, the horizontal track is fixedly arranged on the base frame, and a walking wheel is rotatably arranged at the lower end of the transverse walking frame, and the walking wheel is rollingly arranged on the horizontal track.

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