Thermal insulation device for on-site welding of high-strength steel bars on construction site

Abstract

The utility model discloses a construction site on-site welding high-strength steel bar heat preservation device which comprises a heat preservation metal box, a plurality of air dry burning heating pipes, a temperature controller, a timer, a welding steel bar, a hinge and a handle. The base box and the top cover box are connected into a whole through the hinge, the peripheries of the base box and the top cover box are of a double-layer metal structure, the hollow portion is filled with heat preservation materials, and the base box and the top cover box can be opened and closed through handles of the base box and the top cover box in use. The utility model relates to the field of building structures, in particular to a heat preservation device for on-site welding of high-strength steel bars on a construction site.

Description

Technical Field

[0001] This utility model relates to the field of building structures, specifically to a high-strength steel bar insulation device for on-site welding at construction sites. Background Technology

[0002] The use of high-strength steel bars in reinforced concrete structures can conserve mineral resources, reduce carbon emissions, and indirectly promote industrial upgrading. Simultaneously, it can reduce the amount of steel bars used in the structure itself, saving costs and alleviating the problem of dense steel bars at joints, showing promising application prospects. Currently, my country has included HRB600 grade steel bars in GB 1499.2-2024, "Steel for Reinforced Concrete Part II: Hot-rolled Ribbed Steel Bars." Compared with HRB400 and HRB500 grade low-carbon steel bars, HRB600 grade steel bars have higher strength, but with a carbon content of 0.28%, classifying them as medium-carbon steel.

[0003] When HRB600 grade steel bars are welded on the construction site, brittle fracture is likely to occur. Microscopic examination of the welded joints reveals that martensite is easily formed near the welded area of ​​the HRB600 grade steel bars.

[0004] A heat preservation device for on-site welding of high-strength steel bars was designed and manufactured. By preheating before welding and heat preservation after welding, martensite can be effectively avoided in the welding of HRB600 grade steel bars, thereby ensuring the welding quality of HRB600 grade high-strength steel bars on construction sites. Utility Model Content

[0005] The technical problem to be solved by this utility model needs to meet the following requirements:

[0006] 1. The on-site butt welding connection of HRB600 grade steel bars is reliable and meets the requirements for quality acceptance of steel bar welding connection construction.

[0007] 2. Improve the construction efficiency of on-site steel bar welding connections for HRB600 grade steel bars, and achieve simple construction operations and low costs.

[0008] To solve the above problems, the technical solution adopted by this utility model is as follows: This utility model is a high-strength steel bar insulation device for on-site welding at construction sites, including an insulation metal box, several air dry-burning heating pipes, a temperature controller, a timer, welding steel bars, hinges, and handles. The insulation metal box includes a base box and a top cover box. When the base box and the top cover box are connected, they are connected as a whole by hinges. The base box and the top cover box have a double-layer metal structure on all sides, and the hollow part is filled with insulation material. It can be opened and closed through the handles of the base box and the top cover box during use.

[0009] The base box has an end plate hole one, and the top cover box has an end plate hole two. When the air dry-burning heating tube is connected to the end plate hole one of the base box and the end plate hole two of the top cover box, the screw end of the air dry-burning heating tube with its own external power cord is passed through the end plate hole one of the base box and the end plate hole two of the top cover box respectively. Then, the air dry-burning heating tube is connected to the screw with its own bolt. The cable with the socket is connected to the external power cord of the air dry-burning heating tube and wrapped with electrical insulating tape.

[0010] The top cover box has a top plate hole. When the temperature controller is connected to the top plate hole of the top cover box, the temperature sensor of the temperature controller is passed through the top plate hole of the top cover box and then tightened with the self-contained nut.

[0011] The timer is placed in a location easily observable by the operator, depending on the actual site conditions.

[0012] The base box has two sets of semi-circular holes on the end plates. When the welded steel bars are connected and fixed to the base box, first place the two sets of welded steel bars into the two sets of semi-circular holes on the end plates of the base box, and straighten the welded steel bars so that the centroids of the two sets of welded steel bars are on the same axis. After preheating, the welding is completed in one go. Cover the base box with the handle of the top cover box and continue to heat the air dry heating tube until the temperature controller reaches the required temperature. Observe the timer closely.

[0013] Furthermore, there are two air dry-burning heating tubes: one air dry-burning heating tube installed in the base box and another air dry-burning heating tube installed in the top cover box.

[0014] Furthermore, the base box and the top cover box are "concave" shaped hollow double-layer metal structures. Before welding the end plates, the insulation material should be stuffed into the "concave" shaped hollow interlayer, and then the end plates of the base box and the top cover box should be welded.

[0015] Furthermore, the hinge consists of two hinges, which should be securely welded to the base box and the top cover box.

[0016] Furthermore, the metal material should preferably be high-quality steel plate that is easy to weld and process.

[0017] Furthermore, the insulation material should preferably be a high-quality asbestos or similar material.

[0018] Furthermore, the handles of the base box and the top cover box can be machined from round steel and welded securely to the base box and the top cover box.

[0019] Furthermore, the connection between the air dry-burning heating tube and the base box and top cover box should be leak-proof and reliably insulated. The air dry-burning heating tube should be selected with appropriate power according to the diameter of the steel bar and the size of the weld. U-shaped air dry-burning finned heating tubes are preferred. The external power supply for the air dry-burning heating tube should preferably be a 220V AC power supply.

[0020] Furthermore, the temperature controller should be securely connected to the top cover box. The temperature controller should preferably be an industrial temperature sensor, and its main technical parameters can be: range -40℃~1800℃, error ±1℃.

[0021] Furthermore, the timer should be accurate in timing and can be installed in a location easily observable by the operator, depending on the actual site conditions.

[0022] Furthermore, the welding steel bar is first placed into the semi-circular hole of the end plate of the base box, the welding steel bar joint is aligned, and after preheating, the welding is completed in one go. The top cover box is then closed, and the air dry heating tube continues to heat until the temperature controller reaches the required temperature. The power switch is then turned off, the timer alarm is turned on, and the temperature is slowly lowered until the required holding time is reached.

[0023] Compared with the prior art, the advantages of this utility model are:

[0024] This utility model relates to a heat preservation device for on-site welding of high-strength steel bars at construction sites, which can both meet the preheating requirements before welding and the heat preservation requirements after welding.

[0025] This utility model discloses a high-strength steel bar insulation device for on-site welding at construction sites. It can use a high-power dry-burning air heating tube, which can quickly and timely reach the preheating control temperature and the insulation control temperature. It can effectively eliminate the formation of martensite near the welded part of the steel bar, and ensure the construction quality requirements of the welded point.

[0026] This utility model discloses a construction site welding high-strength steel bar insulation device that is small in size, simple in structure, easy to manufacture, and low in cost; the steel bar welding operation is simple and convenient for on-site construction. Attached Figure Description

[0027] Figure 1 This is a detailed drawing of the components of the steel bar welding connection device proposed in this utility model;

[0028] Figure 2 This utility model provides a schematic diagram of the installation of a metal insulation box;

[0029] Figure 3 for Figure 2 AA section view in the middle;

[0030] Figure 4 for Figure 2 BB section view in the middle.

[0031] Among them, 1-1, base box; 1-2, top cover box; 2, air dry heating tube; 2-1, air dry heating tube one; 2-2, air dry heating tube two; 3, temperature controller; 4, timer; 5, welded steel bar; 6, hinge; 7, handle; 8-1, end plate hole one; 8-2, end plate hole two; 9, end plate semi-circular hole; 10, top cover box hole; 11, thermal insulation asbestos. Detailed Implementation

[0032] As per the instruction manual Figures 1-4 As shown, this utility model is a high-strength steel bar welding insulation device for construction sites. It is suitable for preheating high-strength steel bars before welding and for insulation of welded steel bars after welding. When connecting and fixing two sets of welded steel bars 5 to the base box 1-1, first place the two sets of welded steel bars 5 into the semi-circular holes 9 of the two end plates of the base box 1-1, and straighten the two sets of welded steel bars 5 so that the centroids of the two sets of welded steel bars 5 are on the same axis. After preheating, the welding is completed in one go. Cover the base box 1-1 with the handle 7 of the top cover box 1-2, and continue to heat the air dry heating tube 1 2-1 and the air dry heating tube 2-2 until the temperature controller 3 reaches the required temperature. Observe the timer 4 closely for a period of time, turn off the power switch, and slowly let it cool down until the required holding time is reached.

[0033] This utility model relates to a high-strength steel bar insulation device for on-site welding at construction sites. It not only satisfies the preheating requirement before welding but also provides insulation for the welded steel bars after welding, effectively eliminating the formation of martensite near the weld joint and ensuring the construction quality requirements of the weld point. The device is simple to operate, easy to manufacture, and has a low cost.

[0034] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-strength steel bar insulation device for on-site welding at construction sites, characterized in that: The device includes an insulated metal box (1), several air dry heating tubes (2), a temperature controller (3), a timer (4), welded steel bars (5), hinges (6), and handles (7). The insulated metal box (1) includes a base box (1-1) and a top cover box (1-2). When the base box (1-1) and the top cover box (1-2) are connected, the base box (1-1) and the top cover box (1-2) are connected as a whole by hinges (6). The base box (1-1) and the top cover box (1-2) are double-layered metal structures around their perimeter, and the hollow part is filled with insulation material (11). The handles (7) are respectively provided on the base box (1-1) and the top cover box (1-2). When in use, the handles (7) of the base box (1-1) and the top cover box (1-2) can be opened and closed.

2. The on-site welding high-strength steel bar insulation device according to claim 1, characterized in that: The base box (1-1) is provided with end plate hole one (8-1), and the top cover box (1-2) is provided with end plate hole two (8-2). When the air dry heating tube (2) is connected to end plate hole one (8-1) of the base box (1-1) and end plate hole two (8-2) of the top cover box (1-2), the screw end of the air dry heating tube (2) with its own external power cord is passed through end plate hole one (8-1) and end plate hole two (8-2) respectively. Then, the air dry heating tube (2) is connected to the screw with its own bolt. The cable with socket is connected to the external power cord of the air dry heating tube (2) and wrapped with electrical insulating tape.

3. The on-site welding high-strength steel bar insulation device according to claim 2, characterized in that: The top cover box (1-2) is provided with a top plate hole (10). When the temperature controller (3) is connected to the top plate hole (10) of the top cover box (1-2), the temperature sensor of the temperature controller (3) is passed through the top plate hole (10) of the top cover box (1-2) and then tightened with the self-contained nut.

4. The on-site welding high-strength steel bar insulation device according to claim 3, characterized in that: The timer (4) is placed in a location that is easy for the operator to observe, depending on the actual situation on site.

5. A high-strength steel bar insulation device for on-site welding at a construction site according to claim 4, characterized in that: The base box (1-1) is provided with two sets of end plate semicircular holes (9). When the welded steel bar (5) is connected and fixed to the base box (1-1), the two sets of welded steel bars (5) are first placed in the two sets of end plate semicircular holes (9) of the base box (1-1), the welded steel bars (5) are aligned so that the centroids of the two sets of welded steel bars (5) are on the same axis. After preheating, the welding is completed in one go. The base box (1-1) is covered with the handle (7) of the top cover box (1-2), and the air dry heating tube (2) is continued to heat so that the temperature controller (3) reaches the required temperature. At the same time, the timer (4) is observed.

6. A high-strength steel bar insulation device for on-site welding at a construction site according to claim 5, characterized in that: There are two air dry heating tubes (2), namely, air dry heating tube one (2-1) installed in the base box (1-1) and air dry heating tube two (2-2) installed in the top cover box (1-2).

7. A high-strength steel bar insulation device for on-site welding at a construction site according to claim 6, characterized in that: The temperature controller (3) is an industrial temperature sensor with a range of -40℃ to 1800℃.

8. A high-strength steel bar insulation device for on-site welding at a construction site according to claim 7, characterized in that: The timer (4) is a timer with an alarm clock function.

9. A high-strength steel bar insulation device for on-site welding at a construction site according to claim 8, characterized in that: The insulation material (11) is made of high-quality asbestos insulation material.

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