A portable work cover for welding precast piles

Abstract

This utility model discloses a portable work cover for welding precast piles. The portable work cover for welding precast piles includes a regular polygonal frame and an outer cover. The regular polygonal frame is formed by connecting multiple rectangular frames end to end. One side of each rectangular frame is provided with a hook I, and the other side is provided with a hook II that matches the hook I. Adjacent rectangular frames are fixed by the cooperation of hook I and hook II, and the rectangular frames are perpendicular to the working surface. The outer cover is hung on the regular polygonal frame and includes a transparent top cover and side covers. The transparent top cover is arranged on the top of the regular polygonal frame, and the side covers are located on the outer perimeter of the regular polygonal frame. The outer cover is equipped with an opening and closing zipper. The portable work cover for welding precast piles of this utility model has a simple structure, the regular polygonal frame has good wind resistance and stability, and it is assembled from multiple rectangular frames of the same specifications. The frames can be processed on-site using common materials, making it simple to manufacture and inexpensive, and easy to assemble and disassemble.

Description

Technical Field

[0001] This utility model relates to the field of welding construction technology, and to a portable working cover for welding precast piles. In particular, it relates to a working cover and its method of use that solves the problem that ordinary windproof covers are easy to fall over and have poor windproof effect during welding, which leads to more porosity in the weld of the precast pile body and substandard welding quality. Background Technology

[0002] Modern industrial buildings increasingly adopt pile foundation structures. PHC pipe piles, or prestressed high-strength concrete pipe piles, are hollow cylindrical precast concrete components manufactured using a pre-tensioned prestressed centrifugal molding process and steam-cured at approximately 10 atmospheres (1.0 MPa) and 180°C. The application of PHC precast piles can significantly improve on-site work efficiency. However, on-site construction often requires welding of the pile body. In specific scenarios, such as tropical coastal areas with strong winds, heavy rains, and high humidity, welding is more difficult because the harsh working conditions will affect the number of pores in the weld. Excessive pores in the weld will seriously affect the weld quality, which will greatly affect the pass rate of subsequent strain testing of the pile body.

[0003] CN 220407600 U discloses a windproof cover for welding pipe piles, which uses a support rod and a telescopic rod as the supporting frame of the cover. Although it can effectively protect the working position, its overall structure is complex, its operation is inconvenient and its cost is high. CN 215393386 U discloses a portable windproof cover for welding offshore steel pipe piles. Its structure is reasonable and its windproof effect is good, but its structure is relatively complex and its cost is high, which greatly affects its widespread application in the field.

[0004] Therefore, developing a low-cost and easy-to-operate welding cover that can effectively improve the welding quality of precast piles is of great practical significance. Utility Model Content

[0005] Due to the aforementioned defects in the existing technology, this utility model provides a low-cost and easy-to-operate welding operation cover that can effectively improve the welding quality of precast piles, overcoming the defects of existing welding operation covers that are complex in structure and expensive.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A portable work cover for welding precast piles includes a regular polygonal frame and an outer cover;

[0008] The regular polygonal skeleton is formed by connecting multiple rectangular borders end to end. One side of each rectangular border is provided with a hook I, and the other side is provided with a hook II that matches the hook I. Adjacent rectangular borders are fixed by the cooperation of hook I and hook II, and the rectangular borders are perpendicular to the working surface.

[0009] The outer cover is hung on the regular polygonal frame. The outer cover includes a transparent top cover and side covers. The transparent top cover is arranged on the top of the regular polygonal frame, and the side covers are located on the outer periphery of the regular polygonal frame. The outer cover is equipped with an openable and closable zipper.

[0010] This utility model relates to a portable work cover for welding precast piles. The structure is reasonable and simple. The outer cover is fixed with a regular polygonal frame. The regular polygonal frame has good wind resistance and stability. The frame is assembled from multiple rectangular frames of the same specifications. The rectangular frames can be processed on site using common materials, which is inexpensive and easy to process and manufacture. It is also easy to assemble and disassemble. The presence of a transparent top cover in the outer cover can provide external brightness to the working space inside the work cover (facilitating lighting). It has good application prospects.

[0011] As a preferred technical solution:

[0012] As described above, a portable work cover for welding precast piles has an X-shaped reinforcing rib in the middle of the rectangular frame, which can greatly improve the structural strength of the regular polygonal frame.

[0013] As described above, in a portable work cover for welding precast piles, the connecting part I and the connecting part II are a pin and a pin cylinder, respectively. The pin can be a 7-shaped elbow pin, and a nut can be used as the pin cylinder.

[0014] As described above, a portable work cover for welding precast piles includes an outer cover made of rainproof cloth. The side covers can be made of commercially available rainproof cloth. Both the top and bottom sides of the rainproof cloth are secured with snap-on buttons, spaced 150mm apart and 50mm from the ends. These buttons allow the side covers to be wrapped and secured to a regular polygonal frame. Zippers are sewn at both ends of the rainproof cloth for easy access; they can be zipped up and sealed during welding. Holes are also provided on both the top and bottom sides of the rainproof cloth, spaced 1000mm apart and 80mm from the ends. The bottom holes allow for securing the cloth to the work surface with binding ropes to ensure the overall structural stability.

[0015] As described above, a portable work cover for welding precast piles has a regular polygonal frame arranged around the precast pile as the central axis, and the transparent top cover is fixed to the precast pile by a drawstring rope.

[0016] As described above, in a portable work cover for welding precast piles, the transparent top cover is tightened and fixed to the side cover as a whole by a pull rope.

[0017] The portable work cover for welding precast piles as described above, wherein the regular polygonal frame is a regular hexagonal frame.

[0018] The method of using the portable work cover for welding precast piles mentioned above includes the following steps:

[0019] (1) Arrange multiple rectangular frames around the precast pile as the center and connect the ends of the rectangular frames to form a regular polygon skeleton;

[0020] (2) Attach the side cover to the outside of the regular polygonal frame;

[0021] (3) Install the transparent top cover. The middle part of the transparent top cover is fixed to the precast pile by the binding rope, and the outer edge of the transparent top cover is tightened and fixed to the side cover as a whole by the pull rope.

[0022] (4) On-site workers can enter the portable work cover for welding precast piles through the zipper on the side cover when carrying out welding work;

[0023] (5) After the work is completed, remove the transparent top cover and side cover and dismantle the regular polygonal frame.

[0024] The portable work cover for welding precast piles is easy to use and can be quickly assembled and disassembled. It provides a windless and rain-free working environment for welding precast piles, thereby significantly improving welding quality. At the same time, the work cover is easy to assemble and disassemble and can be reused multiple times on site, resulting in low overall operating costs.

[0025] The above technical solution is only one feasible technical solution of this utility model. The protection scope of this utility model is not limited to this. Those skilled in the art can reasonably adjust the specific design according to actual needs.

[0026] The above-mentioned utility model has the following advantages or beneficial effects:

[0027] (1) The portable working cover for welding precast piles of this utility model has a reasonable and simple structural design. The outer cover is fixed with a regular polygonal frame. The regular polygonal frame has good wind resistance and stability. The frame is assembled by multiple rectangular frames of the same specifications. The rectangular frames can be processed on site using common materials. The cost is low and the processing and manufacturing are simple. It is easy to assemble and disassemble.

[0028] (2) The portable working cover for welding precast piles of this utility model has a transparent top cover that can provide external brightness to the working space inside the working cover (for easy lighting).

[0029] (3) The portable working cover for welding precast piles of this utility model uses mature products on the market for the side cover, which is inexpensive and has good application prospects. Attached Figure Description

[0030] The present 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, the emphasis being on illustrating the gist of the invention.

[0031] Figure 1 This is a schematic diagram of the rectangular border structure;

[0032] Figure 2 This is a schematic diagram of the side shield after it has been deployed;

[0033] Figure 3 A top view of the transparent top cover;

[0034] Figure 4 This is a schematic diagram of the installation elevation of the portable work cover for welding precast piles according to this utility model (only part of the structure is shown in the figure).

[0035] Among them, 1. Rectangular frame; 2. X-shaped reinforcing rib; 3. Pin; 4. Pin tube; 5. Side cover; 6. Side cover zipper; 7. Press-button; 8. Side cover eyelet; 9. Transparent top cover; 10. Top cover zipper; 11. Pull cord; 12. Closure cord; 13. Precast pile. Detailed Implementation

[0036] The structure of this utility model will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the utility model.

[0037] Example 1

[0038] A portable work cover for welding precast piles, such as Figure 4 As shown, it includes a regular polygonal skeleton and an outer casing;

[0039] The regular polygonal skeleton (regular hexagonal skeleton) is formed by multiple (six) rectangular borders 1 connected end to end, and is arranged with the precast pile 13 as the central axis. The rectangular borders 1 are as follows: Figure 1 As shown, the rectangular frame 1 has an X-shaped reinforcing rib 2 in the middle, a pin 3 on one side of the rectangular frame 1, and a pin cylinder 4 that matches the pin 3 on the other side. Adjacent rectangular frames 1 are fixed by the cooperation of the pin 3 and the pin cylinder 4, and the rectangular frame 1 is perpendicular to the working surface.

[0040] The outer cover (rainproof cloth) is hung on a regular polygonal frame. The outer cover includes a transparent top cover 9 and side covers 5. The transparent top cover 9 is arranged on the top of the regular polygonal frame. Figure 3As shown, the transparent top cover 9 is equipped with a top cover zipper 10. The transparent top cover 9 is fixed to the precast pile 13 by a drawstring 12. The transparent top cover 9 is tightened and fixed to the side cover 5 as a whole by a pull rope 11. The side cover 5 is located on the outer periphery of the regular polygonal frame. The side cover 5 is as follows: Figure 2 As shown, the top and bottom sides are fixed with snap buttons 7. The snap buttons are arranged 50mm from the end and 150mm apart. The snap buttons 7 can wrap and fix the side cover 5 to the regular polygonal frame. The two ends of the side cover 5 are sewn with side cover zippers 6. The top and bottom sides of the side cover 5 have side cover holes 8, arranged 80mm from the end and 1000mm apart. The bottom hole can be tied to the working surface with a binding rope to ensure the stability of the overall structure.

[0041] The aforementioned portable work cover for welding precast piles was successfully applied in the Baosteel Zhanjiang Iron & Steel Hydrogen-based Vertical Furnace System Project (Step 1) Direct Reduction Vertical Furnace Project undertaken by the applicant. The project is located in Zhanjiang. Due to Zhanjiang's unique coastal geographical environment, most of the foundations adopt pile foundation structures, with a total of 2,100 precast piles. The number of precast piles is huge and the sea wind is strong. By applying the aforementioned portable work cover for welding precast piles, a good working environment can be provided for welding, improving welding quality. At the same time, the aforementioned work cover can be directly made using on-site materials.

[0042] The welding requirements for the project are as follows: Conventional construction methods will be used for pile joint welding, employing CO2 gas shielded welding. On-site welders must be trained, pass an examination, and hold a valid certificate. Two welders will work simultaneously on each pile driving unit. Windbreaks must be installed at the welding site during welding to ensure the wind force does not exceed level 2, guaranteeing welding quality. During light rain, rain shelters must be provided to protect the weld from rain and electric shock. The flatness of the joint and the accuracy of the bevel preparation must be checked. Deformation of the pile joint caused by handling, pressing, or other operations should be corrected. Tack welding is required for joint positioning during welding. Tack welds are divided into six sections, each 50-80mm long, symmetrically and evenly distributed. The weld height is 4-5mm. The quality requirements for tack welds are the same as for the final welds. If cracks are found in the tack welds, they must be removed and re-welded. Full welding will be performed after tack welding. During the splicing process, the upper and lower pile sections must be on the same axis. This is observed using two theodolites at a 90° angle. If the misalignment exceeds the specified limit, clamps and wedges are used for alignment. After passing the alignment, symmetrical tack welding is performed. Then, the clamps are used to press down the joint, and the weld scars are ground down with a grinder. The welding time is 3-5 minutes. The requirements for splicing pipe piles should comply with the relevant requirements of "Pre-tensioned Prestressed Concrete Pipe Piles ZJ-001-2013".

[0043] (1) The circumferential seam should be welded symmetrically in layers (generally no less than three layers) and measures should be taken to reduce welding deformation.

[0044] (2) Correctly control the welding current and welding speed.

[0045] (3) The thickness of each weld layer should be uniform, and the weld in the groove must be fully welded.

[0046] (4) The weld should be 1mm higher than the groove.

[0047] (5) The weld must meet the requirements for Class II welds in appearance as specified in GB50205, "Code for Acceptance of Construction Quality of Steel Structures".

[0048] The method of using the portable work cover for welding precast piles mentioned above includes the following steps:

[0049] (1) Process a rectangular frame with dimensions of 1000mm*800mm. An X-shaped reinforcing rib is welded in the middle. A pin cylinder is welded on one side of the rectangular frame, and a pin (a 7-shaped elbow with a length of 50mm and a 7-shaped elbow 250mm from the bottom) is welded on the other side. Six rectangular frames are arranged around the precast pile as the center and the ends of the rectangular frames are connected to form a regular hexagonal skeleton.

[0050] (2) The side cover is attached to the outside of the regular polygonal frame. Both the top and bottom sides are fixed with push-buttons. The push-buttons are arranged 50mm from the end and 150mm apart. The push-buttons can wrap and fix the side cover to the regular polygonal frame. The two ends of the side cover are sewn with side cover zippers. The top and bottom sides of the side cover have side cover holes arranged 80mm from the end and 1000mm apart. The bottom hole can be tied to the working surface with a binding rope to ensure the stability of the overall structure.

[0051] (3) Install the transparent top cover. The middle part of the transparent top cover is fixed to the precast pile by the binding rope, and the outer edge of the transparent top cover is tightened and fixed to the side cover as a whole by the pull rope.

[0052] (4) When carrying out welding work, the on-site workers can enter the portable work cover for welding precast piles through the zipper of the side cover to carry out the work, that is, to weld the pile tip and the pile body joint on site. In windy and rainy weather, it can greatly improve the welding quality of the pile material.

[0053] (5) After the work is completed, remove the transparent top cover and side cover and dismantle the regular polygonal frame for reuse in other places to save resources and reduce usage costs.

[0054] Verification has shown that the portable work cover for precast pile welding of this utility model has a reasonable and simple structural design. The outer cover uses a regular polygonal frame as a fixed foundation, which has good wind resistance and stability. The frame is assembled from multiple rectangular frames of the same specifications. The rectangular frames can be processed on-site using common materials, which is inexpensive and easy to manufacture and disassemble. The transparent top cover of the outer cover provides external light to the working space inside the cover (facilitating lighting). The side covers use mature products on the market, which are inexpensive. The portable work cover for precast pile welding is easy to operate and can be quickly disassembled and assembled. It provides a windless and rainless working environment for welding precast piles, thereby significantly improving welding quality. At the same time, the work cover is easy to disassemble and assemble, can be reused multiple times on-site, has low overall operating costs, and has good application prospects.

[0055] Those skilled in the art should understand that variations can be implemented by combining existing technology with the above embodiments, which will not be elaborated here. Such variations do not affect the substantive content of this utility model, and will not be elaborated here.

[0056] The preferred embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above. Devices and structures not described in detail herein should be understood as being implemented in a conventional manner within the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of this utility model using the disclosed methods and techniques, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. This does not affect the essential content of this utility model. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, still fall within the protection scope of the technical solution of this utility model.

Claims

1. A portable work canopy for use in welding precast piles, characterized in that: Includes a regular polygonal frame and an outer casing; The regular polygonal skeleton is formed by connecting multiple rectangular borders end to end. One side of each rectangular border is provided with a hook I, and the other side is provided with a hook II that matches the hook I. Adjacent rectangular borders are fixed by the cooperation of hook I and hook II, and the rectangular borders are perpendicular to the working surface. The outer cover is hung on the regular polygonal frame. The outer cover includes a transparent top cover and side covers. The transparent top cover is arranged on the top of the regular polygonal frame, and the side covers are located on the outer periphery of the regular polygonal frame. The outer cover is equipped with an openable and closable zipper.

2. A portable welding enclosure for precast piles according to claim 1, characterized in that, The rectangular frame has an X-shaped reinforcing rib in the middle.

3. The portable work cover for welding precast piles according to claim 1, characterized in that, The mounting bracket I and mounting bracket II are a pin and a pin cylinder, respectively.

4. A portable work cover for welding precast piles according to claim 1, characterized in that, The outer cover is made of rainproof fabric.

5. A portable work cover for welding precast piles according to claim 1, characterized in that, The regular polygonal frame is arranged with the precast pile as the central axis, and the transparent top cover is fixed to the precast pile by a binding rope.

6. A portable work cover for welding precast piles according to claim 1, characterized in that, The transparent top cover is tightened and fixed to the side cover as a whole by pull ropes.

7. A portable work cover for welding precast piles according to claim 1, characterized in that, The regular polygonal skeleton is a regular hexagonal skeleton.

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