A welding device for assembling the components of a fixed nitric acid reduction tower spray pipe

Abstract

The present application belongs to welding device, specifically relates to a kind of welding device for assembling the components of fixed nitric acid reduction tower spray pipe.A kind of welding device for assembling the components of fixed nitric acid reduction tower spray pipe, wherein, including by parallelly arranged positioning pipe, positioning rod I, positioning rod II, the positioning pipe, positioning rod I, positioning rod II are fixed by fixed disc and determine position.The remarkable effect of the present application is: the technical scheme of the present application improves the quality and effect of component assembly assembly welding, reduces manpower cost, improves quality, shortens cycle.Meanwhile, the technical scheme of the present application is simple, reasonable and compact and easy to operate, and is verified by multiple tests, and the welding device meets the assembly requirements of each component of spray pipe assembly.

Description

Technical Field

[0001] This invention pertains to welding apparatus, specifically to a welding apparatus for assembling and fixing various components of a nitric acid reduction tower spray pipe. Background Technology

[0002] The nitric acid reduction tower is one of the key pieces of equipment in the synthesis of dimethyl oxalate. The spray pipe assembly is a crucial component of the nitric acid reduction tower, with 42 units per unit. It is assembled from flanges, flange covers, and inner extension pipes, each with φ1.5 spray holes drilled in the inner extension pipes, requiring strict orientation. During normal operation, process gas is introduced into the spray pipes. Significant deviations in the spray hole positions will affect sufficient material contact and thus impact equipment operation. Therefore, the assembly precision of this component is extremely high.

[0003] In the past, for similar components in chemical equipment that required high positional accuracy, manual assembly was used to ensure accuracy, which was inefficient and resulted in poor dimensional control. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention provides a welding device for assembling and fixing the various components of the spray pipe of the nitric acid reduction tower.

[0005] The present invention is implemented as follows: a welding device for assembling and fixing the various components of the spray pipe of a nitric acid reduction tower, comprising a positioning pipe, a positioning rod I, and a positioning rod II arranged in parallel, wherein the positioning pipe, positioning rod I, and positioning rod II are fixed and their positions are determined by a fixing plate;

[0006] The fixed plate is a disc-shaped part with several through holes.

[0007] The center of the fixed plate has a through hole corresponding to the size of the positioning tube;

[0008] Around the central through hole of the fixed plate, four through holes corresponding to the dimensions of positioning rod I are evenly opened;

[0009] A through hole corresponding to the size of positioning rod II is opened on the extension line of the central through hole and the upper right through hole;

[0010] The positioning tube has an axial groove, which appears cross-shaped in cross section.

[0011] The welding device described above for assembling and fixing the components of the spray pipe of the nitric acid reduction tower, wherein the positioning rod I is a solid cylindrical part.

[0012] The welding device described above for assembling and fixing the components of the spray pipe of the nitric acid reduction tower, wherein the positioning rod II is a solid cylindrical part.

[0013] The welding device described above for assembling and fixing the various components of the spray pipe of the nitric acid reduction tower has the following specifications: the diameter of the positioning pipe is Ф37mm, the diameter of positioning rod I is Ф15.5mm, the diameter of positioning rod II is Ф18mm, and the position and size accuracy of the fixing plate opening are required to be within 0.2mm.

[0014] As described above, a welding device for assembling and fixing the components of the spray pipe of a nitric acid reduction tower includes a positioning pipe extending 40mm from the other end of a fixing plate, positioning rod I extending 10mm from the other end of a fixing plate, and positioning rod II extending 10mm from the other end of a fixing plate.

[0015] The significant advantages of this invention are: the technical solution of this application improves the quality and effect of component assembly and welding, reduces labor costs, enhances quality, and shortens the cycle time. Furthermore, the technical solution of this application is simple, reasonable, compact, and easy to operate. Through multiple tests, this welding device has been verified to meet the assembly requirements of each component of the spray pipe assembly. Attached Figure Description

[0016] Figure 1 A welding device for assembling and fixing the various components of the spray pipe of the nitric acid reduction tower;

[0017] Figure 2 yes Figure 1 View A;

[0018] Figure 3 This is a single-piece drawing of the "fixed disc";

[0019] Figure 4 This is a single-piece drawing of the "positioning tube";

[0020] Figure 5 yes Figure 4 BB-direction view;

[0021] Figure 6 This is a single-piece drawing of "Positioning Rod I";

[0022] Figure 7 yes Figure 6 C-C view;

[0023] Figure 8 This is a single-piece drawing of "Positioning Rod II";

[0024] Figure 9 yes Figure 8 DD view.

[0025] In the diagram: 1. Fixed plate, 2. Positioning tube, 3. Positioning rod I, 4. Positioning rod II Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] As attached Figures 1-9 As shown, first insert the positioning tube into the center hole of the fixing plate, extend the other end by 40mm and then weld it in place. Then insert the four positioning rods I into the Ф15.5mm hole in the same way, extend the other end by 10mm and then weld it in place. Then insert the positioning rod II into the Ф18mm hole in the same way, extend the other end by 10mm and then weld it in place.

[0028] Assembly and testing of various components of the spray pipe

[0029] The operator first inserts the four holes corresponding to the flange in the spray pipe assembly into the four positioning rods I in the welding device. Then, the inner extension pipe in the spray pipe assembly is inserted into the positioning pipe. The positioning pipe has four slots. The flange and the inner extension pipe are spot welded in the position of each slot. After the spot welding is completed, one hole in the flange cover of the spray pipe is inserted into the positioning rod II. Then the flange cover and the inner extension pipe are spot welded. After the spot welding is completed, the welding device used to assemble and fix the spray pipe of the nitric acid reduction tower is pulled out.

Claims

1. A welding device for assembling and fixing the various components of a nitric acid reduction tower spray pipe, characterized in that: It includes a positioning tube (2), a positioning rod I (3), and a positioning rod II (4) arranged in parallel. The positioning tube (2), the positioning rod I (3), and the positioning rod II (4) are fixed and their positions are determined by a fixing plate (1). The fixed disk (1) is a disc-shaped part with several through holes. The center of the fixed plate (1) has a through hole corresponding to the size of the positioning tube (2); Around the central through hole of the fixed plate (1), four through holes corresponding to the dimensions of the positioning rod I (3) are evenly opened; A through hole corresponding to the size of positioning rod II (4) is opened on the extension line of the central through hole and the upper right through hole; The positioning tube (2) has an axial groove, which is cross-shaped when viewed from the cross section.

2. The welding device for assembling and fixing the components of the spray pipe of a nitric acid reduction tower as described in claim 1, characterized in that: Positioning rod I (3) is a solid cylindrical part.

3. The welding device for assembling and fixing the components of the spray pipe of the nitric acid reduction tower as described in claim 2, characterized in that: Positioning rod II (4) is a solid cylindrical part.

4. The welding device for assembling and fixing the components of the spray pipe of a nitric acid reduction tower as described in claim 3, characterized in that: Positioning tube (2) with a diameter of Ф37mm, positioning rod I (3) with a diameter of Ф15.5mm, positioning rod II (4) with a diameter of Ф18mm, and the opening position and size accuracy of the fixing plate (1) must be within 0.2mm.

5. The welding device for assembling and fixing the components of the spray pipe of the nitric acid reduction tower as described in claim 4, characterized in that: The positioning tube (2) extends 40mm from the fixed plate (1), the positioning rod I (3) extends 10mm from the fixed plate (1), and the positioning rod II (4) extends 10mm from the fixed plate (1).

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