A weld preheating device for large pressure vessel cylinder

Abstract

The utility model discloses a weld preheating device for a large pressure vessel cylinder, comprising a support frame connected to the ground, on which a preheating device for welding the annular seam of the cylinder is arranged, and the preheating device is detachably connected to the support frame through a connecting piece. The beneficial effects of the utility model are: the utility model is convenient to use and saves costs, and the preheating device of the utility model adopts a splicing adjustable structure, which can be used for containers of different diameters, and can achieve the purpose of a set of preheating devices being applicable to multiple products.

Description

Technical Field

[0001] The utility model relates to the technical field of large-scale container welding preheating, in particular to a weld preheating device for a large-scale pressure container cylinder. Background Art

[0002] With the development of the chemical industry, the equipment in the chemical equipment industry is also gradually developing towards large-scale and large-tonnage. In the boiler and pressure vessel industry, some medium and thick steel plates are often encountered. Since the steel plates are relatively thick, their weldability is poor, so some necessary methods are needed in the process to ensure the welding quality.

[0003] Some medium and thick steel plates of carbon steel, alloy steel and low temperature steel need to be preheated and slowly cooled after welding to ensure the welding quality. The annular seam of traditional large container cylinders has a large diameter, so it takes a long time to weld with an automatic welding machine. If the full-circle heating method is used for preheating, most areas will be preheated for a long time without effect, thus wasting energy.

[0004] Therefore, the applicant has found a solution to the above-mentioned problem through beneficial exploration and research, and the technical solution to be introduced below is produced in this context. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a weld preheating device for a large pressure vessel cylinder in view of the above-mentioned deficiencies and defects of the prior art to solve the above-mentioned problems.

[0006] The technical problem to be solved by the present invention can be achieved by adopting the following technical solutions:

[0007] A weld preheating device for a large pressure vessel cylinder, characterized in that it comprises a support frame connected to the ground, on which a preheating device for welding the annular seam of the cylinder is arranged, and the preheating device is detachably connected to the support frame via a connecting piece.

[0008] In a preferred embodiment of the present invention, the preheating device includes a plurality of arc-shaped heating components arranged in an annular manner on the inner wall of the support frame and close to the outer wall of the annular seam of the cylinder.

[0009] In a preferred embodiment of the present invention, two adjacent arc-shaped heating assemblies are detachably connected via a bolt assembly.

[0010] In a preferred embodiment of the utility model, each arc heating assembly includes an arc heating pipe connected to a connecting piece, a plurality of combustion ports arranged on the arc heating pipe and used for preheating and welding the annular seam of the cylinder, and a gas interface arranged on the arc heating pipe for connecting with external combustion gas.

[0011] In a preferred embodiment of the present invention, connecting plates for connection with bolt assemblies are provided on both sides of the arc-shaped heating pipe.

[0012] In a preferred embodiment of the present utility model, a switch valve is provided on the gas interface.

[0013] In a preferred embodiment of the present invention, the connecting member is a connecting flat steel.

[0014] Due to the adoption of the above technical solution, the beneficial effects of the utility model are: the utility model is easy to use and saves costs. The preheating device of the utility model adopts a spliced ​​adjustable structure and can be used for containers of different diameters, so that a set of preheating devices can be used for multiple products. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is the front view of the utility model.

[0017] Figure 2 It is a side view of the utility model.

[0018] Figure 3 It is a structural schematic diagram of the preheating device of the utility model.

[0019] Figure 4 yes Figure 3 Top view of the .

[0020] Figure 5 It is a schematic diagram of the connection structure of two arc-shaped heating components of the utility model. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0022] See also Figures 1 to 5 The weld preheating device of a large pressure vessel cylinder shown in the figure includes a support frame 100 connected to the ground, on which a preheating device 200 for welding the annular seam 1a of the cylinder 1 is provided, and the preheating device 200 is detachably connected to the support frame 100 via a connecting piece 2.

[0023] The preheating device 200 includes a plurality of arc-shaped heating components 210 arranged in an annular manner inside the support frame 100 and close to the outer wall of the cylinder annular seam 1a. In this embodiment, two adjacent arc-shaped heating components 210 are detachably connected by a bolt assembly 220. Specifically, the preheating device 200 of the utility model adopts a splicing adjustable structure, which can be used for containers of different diameters, so that one set of preheating devices can be applied to multiple products.

[0024] Each arc-shaped heating assembly 210 includes an arc-shaped heating pipe 211 connected to the connecting piece 300, a plurality of burner ports 212 arranged on the arc-shaped heating pipe 211 and used for preheating and welding the cylinder annular seam 1a, and a gas interface 213 arranged on the arc-shaped heating pipe 211 and connected to the external combustion gas. In this embodiment, connecting plates 214 for connecting the bolt assembly 220 are arranged on both sides of the arc-shaped heating pipe 211.

[0025] In order to effectively block the gas leakage from the gas interface, a switch valve (not shown in the figure) is provided on the gas interface 213.

[0026] The working principle of the utility model is as follows: the cylinder 1 is placed on the bracket. When the cylinder 1 needs to be welded and preheated, the annular seam 1a of the cylinder 1 is preheated and welded through the burners 212 on the arc-shaped heating components 210 of the preheating device 200, and the corresponding welding and preheating work is carried out in coordination with the uniform rotation of the bracket, thereby realizing the preheating of the annular seam 1a of the cylinder 1. Moreover, the preheating device 200 of the utility model adopts a splicing adjustable structure and can be used for containers of different diameters, so as to achieve the purpose of a set of preheating devices being suitable for multiple products.

[0027] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A weld preheating device for a large pressure vessel cylinder, characterized in that: It comprises a support frame connected to the ground, the support frame is provided with a preheating device for welding the annular seam of the cylinder, and the preheating device is detachably connected to the support frame through a connecting piece; The preheating device comprises a plurality of arc-shaped heating components which are arranged in an annular manner on the inner wall of the support frame and close to the outer wall of the annular seam of the cylinder, and two adjacent arc-shaped heating components are detachably connected by a bolt assembly; Each arc-shaped heating assembly includes an arc-shaped heating pipe connected to the connecting piece, a plurality of combustion ports arranged on the arc-shaped heating pipe and used for preheating and welding the annular seam of the cylinder, and a gas interface arranged on the arc-shaped heating pipe and connected to the external combustion gas; The gas interface is provided with a switch valve; The cylinder is placed on the bracket. When the cylinder needs to be welded and preheated, the annular seam of the cylinder is preheated and welded through the burning ports on the several arc-shaped heating components of the preheating device, and the corresponding welding and preheating work are carried out in coordination with the uniform rotation of the bracket, thereby realizing the preheating of the annular seam of the cylinder. Moreover, the preheating device of the utility model adopts a spliced ​​adjustable structure and can be used for containers of different diameters, so as to achieve the purpose of one set of preheating device being suitable for multiple products.

2. The weld preheating device for a large pressure vessel cylinder according to claim 1 is characterized in that: Connecting plates for connection of bolt assemblies are arranged on both sides of the arc-shaped heating pipe.

3. The weld preheating device for a large pressure vessel cylinder according to claim 1 is characterized in that: The connecting piece is a connecting flat steel.

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