An outdoor large pipeline welding work shed

Abstract

The utility model discloses an outdoor large-scale pipeline welding work shed, comprising two arch supports of the same specification, a gap between the two arch supports, the pipeline passing through the bottom of the two arch supports, the arch supports being a double-layer structure, a step is arranged in the gap between the two arches, workers stand on the steps to work, the four corners of the steps are detachably connected to the inner layer and the outer layer of the two arch supports respectively, a welding shed is also arranged above the two arch supports, the welding shed provides a relatively closed space for working in the shed, the welding shed of the utility model is a fully enclosed type, when the foundation pit collapses, people in the welding shed can avoid safety accidents of being buried to a great extent, buy time for rescue, and ensure the safety of welding workers to a great extent.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to an outdoor large-scale pipeline welding work shed. Background Art

[0002] At present, outdoor operations on large pipelines are difficult and involve many uncertainties. Large pipelines laid outdoors are mostly laid underground, and there is a risk of foundation pit collapse when workers are welding in the foundation pit. Traditional large pipeline welds use stepladders, which pose a risk of falling. The outdoor large pipeline welding operation environment is relatively complex, and it is difficult to ensure construction quality in open operations. In order to ensure the safety of workers and the quality of welding, a large pipeline welding operation shed is designed. Utility Model Content

[0003] The utility model aims to address the deficiencies of the prior art and provides an outdoor large-scale pipeline welding work shed, comprising two arch supports of the same specifications, a gap between the two arch supports, the pipeline passing through the bottom of the two arch supports, the arch supports being a double-layer structure, a step is provided in the gap between the two arches, workers stand on the step to work, the four corners of the step are respectively detachably connected to the inner layer and the outer layer of the two arch supports, a welding shed is also provided above the two arch supports, and the welding shed provides a relatively closed space for working in the shed.

[0004] Preferably, the number of the steps is several and evenly distributed between the two arch supports, and the steps are fixed to the arch by bolts or plug-in.

[0005] Preferably, a two-layer operating platform is provided at the end between each of the arches, and the two-layer operating platform is fixed by welding.

[0006] Preferably, a detachable movable ladder is provided between the second-floor operating platform and the ground, and the upper end of the detachable movable ladder is fixed to the second-floor operating platform by bolts or plug-in.

[0007] Preferably, a handrail is provided at the upper end of each of the arched supports, and a safety rope is tied to the handrail.

[0008] Compared with the prior art, the beneficial effects of the utility model are as follows: the welding shed of the utility model is fully enclosed, and the protection on both sides of the foundation pit adopts a two-layer operating platform, which can not only ensure a certain strength but also reduce the overall weight of the welding shed. When the foundation pit collapses, people in the welding shed can largely avoid safety accidents of being buried, which buys time for rescue and largely ensures the safety of welding workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0010] Figure 1 It is a structural schematic diagram of the utility model;

[0011] In the figure: 1-arch support; 2-step; 3-welding shed; 4-second-floor operating platform; 5-handrail; 6-detachable movable ladder. DETAILED DESCRIPTION

[0012] The technical solution of the utility model is described in detail below with reference to the accompanying drawings, but the protection scope of the utility model is not limited to the embodiments.

[0013] Reference Figure 1 The utility model discloses an outdoor large-scale pipeline welding work shed, an outdoor large-scale pipeline welding work shed, comprising two arch supports 1 of the same specification, a gap between the two arch supports 1, the pipeline passes through the bottom of the two arch supports 1, the arch support 1 is a double-layer structure, a step 2 is arranged in the gap between the two arches, workers stand on the step 2 to work, the four corners of the step 2 are detachably connected to the inner layer and the outer layer of the two arch supports 1, a welding shed 3 is also arranged above the two arch supports 1, the welding shed 3 provides a relatively closed space for working in the shed, large pipelines are mostly buried, due to the design of the pipeline direction, most pipeline paths are relatively complicated, and Moreover, the pipeline is basically excavated or supported by slope reduction. No matter which method is used, there is a risk of foundation pit collapse. The operation time of large-scale pipeline joint welding is relatively long. During welding operations, welders focus on pipeline welding and it is difficult to pay attention to the dynamics of the foundation pit, making it difficult to ensure safety. In order to avoid damage to workers caused by foundation pit collapse, this welding shed 3 is designed. This welding shed 3 is fully enclosed, and patterned steel plates are used as the second-layer operating platform 4 on both sides of the foundation pit for protection. The second-layer operating platform 4 is fixed by welding, which can not only ensure a certain strength but also reduce the overall weight of the welding shed 3. When the foundation pit collapses, people in the operating shed can largely avoid safety accidents of being buried, buy time for rescue, and largely ensure the safety of welding workers.

[0014] At the same time, traditional large-scale pipeline side and top welding mostly uses a herringbone ladder or a single-sided ladder for work. When people work on a herringbone ladder or a single-sided ladder, the bottom of the ladder is a soil layer, and the soil has a poor bearing capacity for the ladder, so it is easy to overturn. In addition, there is no fixed point for the safety belt, and there is a risk of falling. This welding shed 3 is fully enclosed, with a handrail 5 and a safety rope fixing point on the top to avoid the risk of workers falling.

[0015] In addition, all welding methods, including CO2 gas shielded welding, arc welding, and argon arc welding, have requirements for wind speed. CO2 gas shielded welding and arc welding require wind speeds no greater than 8m / s, and argon arc welding requires wind speeds no greater than 2m / s. Wind speeds greater than the standard value will affect welding quality, and pores are likely to form in the weld. Traditionally, it is difficult to ensure that the wind speed is within the standard value when performing outdoor welding of large pipelines in open spaces. This large pipeline welding work shed is a relatively closed space, which can effectively avoid the impact of wind speed on weld quality, thereby ensuring the welding quality of the pipeline.

[0016] Secondly, the relative humidity in the welding operation area should not be greater than 90%. Excessive humidity will easily cause pores in the weld, and aggregated pores will cause weld quality defects. When the relative humidity of the surrounding environment exceeds the standard value, a hot air blower can be added to the operating shed to heat the air in the operating shed. When the temperature rises, the relative humidity will decrease. Welding should be carried out at a relative humidity that meets the standard requirements to ensure weld quality. This operating shed can effectively avoid the impact of humidity on weld quality.

[0017] Finally, the welding preheating temperature should be determined according to the relevant welding specifications or standard values, and adjusted according to the specific situation. The common welding preheating temperature range is 100℃-300℃. Failure to reach the preheating temperature will cause welding deformation and cracks. Before welding the pipeline in the traditional outdoor open space, it is difficult to heat the pipeline to the required preheating temperature. This large pipeline welding work shed is a closed environment, which can largely ensure that the pipeline is heated to the required preheating temperature, thereby ensuring the welding quality.

[0018] In the utility model, the number of the steps 2 is several and evenly distributed between the two arch supports 1. The steps 2 are fixed to the arch by bolts or plug-in. When the pipeline is welded to the middle and lower part of the pipeline and the position of the step 2, the step 2 is temporarily removed without affecting the pipeline welding. When the pipeline is welded to the middle and upper part, the step 2 is installed.

[0019] A detachable movable ladder 6 is provided between the second-floor operating platform 4 and the ground, and the upper end of the detachable movable ladder 6 is fixed to the second-floor operating platform 4 by bolts or plug-in. The detachable step 2 is used as a welding personnel to enter the second-floor platform and is temporarily removed during hoisting. The second-floor operating platform 4 is used as a welding personnel to move up and down the detachable step 2 to weld the middle and top of the pipe.

[0020] As above, although the utility model has been shown and described with reference to a specific preferred embodiment, it should not be interpreted as limiting the utility model itself. Various changes can be made to it in form and detail without departing from the spirit and scope of the utility model defined in the attached claims.

Claims

1. An outdoor large-scale pipeline welding work shed, characterized by: It includes two arch supports of the same specifications, with a gap between the two arch supports, and the pipeline passes through the bottom of the two arch supports. The arch supports are of a double-layer structure, and a step is provided in the gap between the two arches. Workers stand on the steps to work, and the four corners of the steps are detachably connected to the inner layer and the outer layer of the two arch supports respectively. A welding shed is also provided above the two arch supports, and the welding shed provides a relatively closed space for working in the shed.

2. The outdoor large-scale pipeline welding work shed according to claim 1 is characterized by: The number of the steps is several and they are evenly distributed between the two arch supports. The steps are fixed to the arch by bolts or plug-in.

3. The outdoor large-scale pipeline welding work shed according to claim 2 is characterized by: A two-layer operating platform is provided at the end between each of the arches, and the two-layer operating platform is fixed by welding.

4. The outdoor large-scale pipeline welding work shed according to claim 3 is characterized by: A detachable movable ladder is arranged between the second-floor operating platform and the ground, and the upper end of the detachable movable ladder is fixed to the second-floor operating platform by bolts or plug-in.

5. The outdoor large-scale pipeline welding work shed according to claim 4 is characterized by: A handrail is arranged at the upper end of each arch support, and a safety rope is tied to the handrail.

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