Welding preheating and heat preservation mechanism for large-section steel structural part

Abstract

The utility model discloses a preheating and heat preservation mechanism for welding of a large-section steel structural member, which relates to the technical field of welding auxiliary devices and comprises an upper winding shaft, two side winding shafts, a lower winding shaft, a connecting piece and a detachable piece. A heat-insulating pad; a tail end fastener; the heat preservation pads are wound on the winding shafts, the four winding shafts are arranged on the steel structural part in a sleeving mode, the lower winding shaft and the side winding shafts are connected together through detachable pieces, the four winding shafts are spliced into a rectangular structure, then the steel structural part is arranged among the four winding shafts in a penetrating mode, and the four heat preservation pads are connected with the four outer surfaces of the steel structural part respectively. The uncoiled ends of the four heat preservation pads are bound and connected through tail end fasteners, then the four heat preservation pads are tightly attached to the surface of the steel structural part, heat preservation can be conducted on the weld joint of the preheated steel structural part, and the uncoiled length of the heat preservation pads can be adjusted by rotating a winding shaft; and therefore, heat preservation can be carried out on a plurality of weld joints on the steel structural part.

Description

Technical Field

[0001] This utility model relates to the technical field of welding auxiliary devices, specifically a preheating and heat preservation mechanism for welding large-section steel structural components. Background Technology

[0002] During steel structure construction, welding is a critical factor affecting the construction process. Preheating before welding and heat preservation after welding are the most basic construction methods for welding operations in winter. Due to the large difference between the ambient temperature and the surface temperature of the preheated components, if no measures are taken after preheating, the weld temperature will drop sharply in a short period of time. By the time welding begins, the surface temperature of the welding area has already dropped to atmospheric temperature, and the welding quality cannot be guaranteed.

[0003] Therefore, this application proposes a welding preheating and insulation mechanism for large-section steel structural components. Utility Model Content

[0004] The purpose of this utility model is to provide a preheating and insulation mechanism for welding large-section steel structural components, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a preheating and insulation mechanism for welding large-section steel structural components, comprising:

[0006] The winding shaft has four sections assembled in a rectangular structure. The four winding shafts are defined from top to bottom as an upper winding shaft, two side winding shafts, and a lower winding shaft. The upper ends of the two side winding shafts are connected to the two ends of the upper winding shaft through connectors. The two ends of the lower winding shaft are connected to the lower ends of the two side winding shafts through detachable parts.

[0007] The thermal insulation pads are provided in four parts and are respectively wound on four winding shafts, with the four thermal insulation pads forming an installation space;

[0008] Tail-end fasteners are used to secure one end of the four insulation pads that have been unrolled.

[0009] Furthermore, the connector includes a first connecting bracket with an L-shaped profile, and four winding shafts are coaxially fixed to a rotating shaft. The rotating shaft on the upper winding shaft is horizontally rotatably connected to the vertical section of the first connecting bracket, and the rotating shaft on the side winding shaft is vertically rotatably connected to the horizontal section of the first connecting bracket.

[0010] Furthermore, the detachable component includes a second connecting bracket with an L-shaped profile. The lower end of the rotating shaft on the side winding shaft is rotatably connected to the horizontal section of the second connecting bracket. The vertical section of the second connecting bracket has a notch or groove for the rotating shaft of the lower winding shaft to pass freely. The second connecting bracket is provided with an axial positioning structure for axially positioning the rotating shaft on the lower winding shaft.

[0011] Furthermore, each end of the rotating shaft is fitted with a bevel gear, and two adjacent bevel gears are in an external meshing state.

[0012] Furthermore, the axial positioning structure includes an ear block fixed to the second connecting bracket, a positioning bolt threaded through the ear block horizontally, and a blind hole for the positioning bolt to be inserted at the end of the rotating shaft on the lower winding shaft.

[0013] Furthermore, a ball bearing is rotatably fitted at the end of the positioning bolt, and the ball bearing rolls in contact with the inner wall of the blind hole.

[0014] Furthermore, the tail fastener includes two U-shaped fastening brackets, which are defined as a first fastening bracket and a second fastening bracket, respectively. The lower ends of the first fastening bracket and the lower ends of the second fastening bracket are hinged together, and their upper ends are connected by a disassembly structure.

[0015] Furthermore, the disassembly structure includes protrusions fixed to the upper ends of the two fastening brackets, and the two protrusions are connected by bolts.

[0016] Furthermore, the fastening bracket is made of spring steel.

[0017] Furthermore, an arc-shaped through groove is provided on the inner side wall of the bent portion of the fastening bracket.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This invention features a winding shaft on which insulation pads are wound. Four winding shafts are fitted onto a steel structural member, with the lower and side winding shafts connected by detachable parts, forming a rectangular structure. The steel structural member is then placed between the four winding shafts, and the four insulation pads are attached to the four outer surfaces of the steel structural member. Fasteners at the tail ends bind and connect the unwound ends of the four insulation pads, ensuring they adhere tightly to the surface of the steel structural member. This provides insulation for the weld seams of the preheated steel structural member. Furthermore, by rotating the winding shafts, the unwound length of the insulation pads can be adjusted, allowing for insulation of multiple weld seams on the steel structural member.

[0020] This utility model installs bevel gears at the ends of the rotating shafts, with two adjacent bevel gears meshing externally. This allows one of the four winding shafts to rotate, driving the other three winding shafts to rotate simultaneously. This enables the simultaneous unwinding and rewinding of the insulation pads on the four winding shafts, making the operation simple.

[0021] This invention positions the lower winding shaft by inserting the end of a positioning bolt into a blind hole in the shaft on the lower winding shaft, thus facilitating the assembly of the four winding shafts onto the steel structure and making the operation convenient. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a welding preheating and insulation mechanism for large-section steel structural components according to this utility model;

[0023] Figure 2 for Figure 1 A schematic diagram of the structure viewed from below;

[0024] Figure 3 for Figure 1 Structural diagram omitting steel structural components;

[0025] Figure 4 for Figure 3 A schematic diagram of the structure viewed from below;

[0026] Figure 5 This is a schematic diagram of the structure after the four winding shafts are assembled in this invention;

[0027] Figure 6 for Figure 5 A cross-sectional view of the middle section of the structure;

[0028] Figure 7 for Figure 6 Enlarged schematic diagram of the local structure at point A;

[0029] Figure 8 This is a schematic diagram of the structure after the positioning bolts and balls are assembled in this invention.

[0030] The reference numerals in the figures are explained as follows: 1. Steel structural component; 2. First fastening bracket; 3. Bolt; 4. Protrusion; 5. Second fastening bracket; 6. Insulation pad; 7. Bevel gear; 8. Upper winding shaft; 9. First connecting bracket; 10. Side winding shaft; 11. Second connecting bracket; 12. Positioning bolt; 13. Lower winding shaft; 14. Ear block; 15. Ball bearing; 16. Notch groove; 17. Rotating shaft; 18. Blind hole. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figures 1-8 This utility model provides a technical solution: a welding preheating and insulation mechanism for large cross-section steel structural components, comprising four winding shafts, which are assembled in a rectangular structure. The four winding shafts are defined from top to bottom as an upper winding shaft 8, two side winding shafts 10, and a lower winding shaft 13. A rotating shaft 17 is coaxially fixed to the upper winding shaft 8, the lower winding shaft 13, and the two side winding shafts 10. The rotating shaft 17 on the upper winding shaft 8 and the rotating shafts 17 on the two side winding shafts 10 are connected to two first connecting brackets 9. The outer contour of the first connecting brackets 9 is L-shaped. The two ends of the rotating shaft 17 on the upper winding shaft 8 are rotatably connected to the vertical sections of the two first connecting brackets 9, and the upper ends of the rotating shaft 17 on the side winding shafts 10 are rotatably connected to the horizontal sections of the two first connecting brackets 9.

[0033] A second connecting bracket 11 is connected between the rotating shaft 17 on the lower winding shaft 13 and the rotating shaft 17 on the two side winding shafts 10. The outer contour of the second connecting bracket 11 is L-shaped. The vertical section of the second connecting bracket 11 has a notch 16 for the rotating shaft 17 of the lower winding shaft 13 to pass freely. Each end of the rotating shaft 17 is fitted with a bevel gear 7. The two adjacent bevel gears 7 are in an external meshing state. An ear block 14 is welded on the second connecting bracket 11. A positioning bolt 12 is threaded horizontally through the ear block 14. The end of the rotating shaft 17 on the lower winding shaft 13 has a blind hole 18 for the positioning bolt 12 to be inserted. A ball 15 is rotatably embedded at the end of the positioning bolt 12. The ball 15 rolls and contacts the inner wall of the blind hole 18.

[0034] When insulating the weld seam of steel structure component 1, four winding shafts should be fitted onto steel structure component 1. Specifically, first, the upper winding shaft 8 and two side winding shafts 10 are fitted onto steel structure component 1. Then, the rotating shaft 17 on the lower winding shaft 13 is inserted into the notch 16 of the second connecting bracket 11. Then, the positioning bolt 12 is screwed on the ear block 14 until the end of the positioning bolt 12 is inserted into the blind hole 18 of the rotating shaft 17 of the lower winding shaft 13, so that the ball 15 rolls in contact with the inner wall of the blind hole 18. In this way, the two adjacent bevel gears 7 at the ends of the rotating shafts 17 on the four winding shafts are in a meshing state. When one winding shaft rotates, the other winding shafts will rotate synchronously through the meshing of the bevel gears 7, and the rectangular structure assembled by the four winding shafts will fit onto steel structure component 1.

[0035] The other four winding shafts are each wound with an insulation pad 6, and the four insulation pads 6 form an installation space. The steel structure 1 is inserted into the installation space. The surfaces of the other four insulation pads 6 are in contact with the four outer surfaces of the steel structure 1. Two fastening brackets with U-shaped outer contours are installed on the steel structure 1. The two fastening brackets are defined as the first fastening bracket 2 and the second fastening bracket 5, respectively. The lower ends of the first fastening bracket 2 and the second fastening bracket 5 are hinged together. The upper ends of the two fastening brackets are each welded with a protrusion 4, and the two protrusions 4 are connected by bolts 3.

[0036] The ends of the four insulation pads 6 that are unrolled are squeezed by the inner walls of the first fastening bracket 2 and the second fastening bracket 5, respectively, so that the four insulation pads 6 can be tightly attached to the surface of the steel structure component 1. In addition, the inner wall of the bent part of the fastening bracket has an arc-shaped through groove, which prevents the edge of the end of the insulation pad 6 from being interfered with by the inner wall of the bent part of the fastening bracket. Furthermore, the fastening bracket is made of spring steel, which gives the fastening bracket good elastic deformation ability and prevents the fastening bracket from plastic deformation.

[0037] The working principle of this utility model is as follows: When insulating the weld of the steel structure component 1, four winding shafts are to be fitted onto the steel structure component 1. Specifically, first, the upper winding shaft 8 and two side winding shafts 10 are fitted onto the steel structure component 1. Then, the rotating shaft 17 on the lower winding shaft 13 is inserted into the notch 16 of the second connecting bracket 11. Then, the positioning bolt 12 is screwed on the ear block 14 until the end of the positioning bolt 12 is inserted into the blind hole 18 of the rotating shaft 17 of the lower winding shaft 13, so that the ball 15 rolls in contact with the inner wall of the blind hole 18. In this way, the two adjacent bevel gears 7 at the ends of the rotating shafts 17 on the four winding shafts are in a meshing state. When one winding shaft rotates, the other winding shafts will rotate synchronously through the meshing of the bevel gears 7. At the same time, the rectangular structure assembled by the four winding shafts is fitted onto the steel structure component 1.

[0038] The first fastening bracket 2 and the second fastening bracket 5 are fitted onto the steel structure component 1, and then rotated until the two protrusions 4 are close to each other. Then, the bolts 3 are tightened, and the bolts 3 are threaded to the two protrusions 4, so that the first fastening bracket 2 and the second fastening bracket 5 are assembled into a U-shaped structure. This causes the inner walls of the first fastening bracket 2 and the second fastening bracket 5 to press the four ends of the unrolled insulation pads 6. After preheating the weld of the steel structure component 1, the first connecting bracket 9 and / or the second connecting bracket 11 are pushed, so that the winding shaft moves away from the first fastening bracket 2. During the movement, one of the winding shafts rotates, and through the external meshing of two adjacent bevel gears 7, the four winding shafts rotate synchronously, so that the insulation pads 6 are unrolled from the winding shafts until the insulation pads 6 cover the preheated weld. The insulation pads 6 are straightened and attached to the surface of the steel structure component 1, thereby insulating the weld.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A preheating and insulation mechanism for welding large-section steel structural components, characterized in that, include: The winding shaft has four sections assembled in a rectangular structure. The four winding shafts are defined from top to bottom as an upper winding shaft (8), two side winding shafts (10), and a lower winding shaft (13). The upper ends of the two side winding shafts (10) are connected to the two ends of the upper winding shaft (8) through connectors. The two ends of the lower winding shaft (13) are connected to the lower ends of the two side winding shafts (10) through detachable parts. The heat insulation pad (6) is provided in four parts and is respectively wound on four winding shafts, and the four heat insulation pads (6) form an installation space; Tail-end fasteners are used to secure one end of the four insulation pads (6) that have been unrolled.

2. The preheating and insulation mechanism for welding large-section steel structural components according to claim 1, characterized in that, The connector includes a first connecting bracket (9) with an L-shaped profile, and four winding shafts are coaxially fixed with a rotating shaft (17). The rotating shaft (17) on the upper winding shaft (8) is horizontally rotatably connected to the vertical section of the first connecting bracket (9), and the rotating shaft (17) on the side winding shaft (10) is vertically rotatably connected to the horizontal section of the first connecting bracket (9).

3. The preheating and insulation mechanism for welding large-section steel structural components according to claim 2, characterized in that, The detachable component includes a second connecting bracket (11) with an L-shaped profile. The lower end of the rotating shaft (17) on the side winding shaft (10) is rotatably connected to the horizontal section of the second connecting bracket (11). The vertical section of the second connecting bracket (11) is provided with a notch (16) for the rotating shaft (17) of the lower winding shaft (13) to pass freely. The second connecting bracket (11) is provided with an axial positioning structure for axially positioning the rotating shaft (17) on the lower winding shaft (13).

4. The preheating and insulation mechanism for welding large-section steel structural components according to claim 3, characterized in that, Each end of the rotating shaft (17) is fitted with a bevel gear (7), and two adjacent bevel gears (7) are in an external meshing state.

5. The preheating and insulation mechanism for welding large-section steel structural components according to claim 3, characterized in that, The axial positioning structure includes an ear block (14) fixed to the second connecting bracket (11), a positioning bolt (12) is threaded horizontally through the ear block (14), and a blind hole (18) is provided at the end of the rotating shaft (17) on the lower winding shaft (13) for the positioning bolt (12) to be inserted.

6. The preheating and insulation mechanism for welding large-section steel structural components according to claim 5, characterized in that, The end of the positioning bolt (12) is rotatably fitted with a ball (15), which rolls in contact with the inner wall of the blind hole (18).

7. The preheating and insulation mechanism for welding large-section steel structural components according to claim 1, characterized in that, The tail fastener includes two U-shaped fastening brackets, which are defined as a first fastening bracket (2) and a second fastening bracket (5). The lower ends of the first fastening bracket (2) and the second fastening bracket (5) are hinged together, and their upper ends are connected by a disassembly structure.

8. The preheating and insulation mechanism for welding large-section steel structural components according to claim 7, characterized in that, The disassembly structure includes protrusions (4) fixed to the upper ends of the two fastening brackets, and the two protrusions (4) are connected by bolts (3).

9. The preheating and insulation mechanism for welding large-section steel structural members according to claim 7, characterized in that, The fastening bracket is made of spring steel.

10. The preheating and insulation mechanism for welding large-section steel structural members according to claim 7, characterized in that, The inner wall of the bent portion of the fastening bracket is provided with an arc-shaped through groove.

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