Special tube plate hole internal defect repair welding tool

Abstract

The utility model discloses a repair welding tool for internal defects of special tube plate holes. The repair welding tool comprises a tube plate body. The peripheral pipe holes are distributed in the peripheries of the pipe holes needing to be repaired in the pipe plate body; the copper rod is inserted into the peripheral pipe hole; one end of the tungsten electrode extends into the defect position in the pipe hole needing to be repaired; the pipe plate comprises a pipe plate body, a copper rod, a tungsten electrode and a local protection box, the copper rod is inserted into a peripheral pipe hole in the periphery of the pipe hole to be repaired, the local protection box is arranged at the position, corresponding to the pipe hole to be repaired, of the bottom of the pipe plate body, and argon is filled into the local protection box. Then the local protection box is placed at the position, corresponding to the pipe hole needing to be repaired, of the bottom of the pipe plate body, argon is filled into the local protection box during repair welding, then the defect position in the pipe hole needing to be repaired is found, the tip end of the tungsten electrode is aligned to the defect position, and repair welding is conducted through a welding wire. The problem that repair welding is difficult to machine due to deformation, oxidation and poor fusion of repair welding of the tube plate hole is effectively solved, and the repair welding quality of defects in the tube plate hole is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of repair welding of inner holes of heat exchanger tube sheets, and in particular relates to a special tool for repair welding of inner defects of tube sheet holes. Background Art

[0002] When processing the tube holes of the heat exchanger tube sheet, due to operational reasons, processing defects such as steps or other defects may appear inside the tube sheet holes. After the defects appear, it is difficult to repair welding due to the depth, and reprocessing wastes costs and cycles;

[0003] The existing conventional argon arc welding cannot accurately locate the welding defect position, cannot effectively control the welding deformation, and cannot effectively take protective measures, resulting in poor quality of tube sheet hole repair welding. For this reason, we propose a special tube sheet hole internal defect repair welding tool. Utility Model Content

[0004] The utility model aims to provide a special tube sheet hole internal defect repair welding tool to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: a special tube sheet hole internal defect repair welding tool, comprising

[0006] Tube sheet body;

[0007] Peripheral tube holes, distributed on the outer periphery of the tube holes to be repaired and welded on the tube sheet body;

[0008] A copper rod inserted into the peripheral tube hole;

[0009] A tungsten electrode, one end of which extends into the defect in the pipe hole to be repaired;

[0010] A local protection box is arranged at the bottom of the tube sheet body at a position corresponding to the tube hole to be repaired, and argon gas is filled into the local protection box.

[0011] Preferably, the copper rod is made of copper alloy material.

[0012] Preferably, a boss is provided at the upper end of the copper rod, and a hanging ring is provided on the boss.

[0013] Preferably, the diameter of the copper rod is the same as the diameter of the peripheral tube hole.

[0014] Preferably, one end of the tungsten pole is configured as a tip structure.

[0015] Preferably, a section of the tungsten electrode close to the tip is an arc-shaped structure, and the tip and the tungsten electrode form a 90° right angle.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model is provided with a copper rod, a tungsten electrode and a local protection box. When in use, the copper rod is inserted into the peripheral tube holes of the outer periphery of the tube hole to be repaired, and then the local protection box is placed at the position of the tube hole to be repaired at the bottom of the tube plate body corresponding to the position of the tube hole to be repaired, and argon gas is filled into the local protection box during repair welding, and then the position of the defect in the tube hole to be repaired is accurately found, the tip of the tungsten electrode is aligned with the position of the defect, and welding wire is used for repair welding, which effectively solves the difficult processing repair welding problems of deformation, oxidation and poor fusion of the tube plate hole repair welding, and improves the quality of defect repair welding in the tube plate hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure of the tungsten electrode of the utility model.

[0020] In the figure: 1. tube sheet body; 2. peripheral tube holes; 3. tube holes to be repaired; 4. copper rod; 401. boss; 402. lifting ring; 5. tungsten electrode; 6. defect; 7. local protection box. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-Figure 2 The utility model provides a special tube plate hole internal defect repair welding tool, including

[0023] Tubesheet body 1;

[0024] Peripheral tube holes 2, distributed on the outer periphery of the tube holes 3 to be repaired and welded on the tube sheet body 1;

[0025] The copper rod 4 is inserted into the peripheral tube hole 2 to fix the peripheral tube hole 2 to prevent the peripheral tube hole 2 from being deformed by heat and affecting the subsequent assembly and manufacturing of the heat exchange tube. The copper rod 4 is made of copper alloy material and has good thermal conductivity. It can quickly transfer the welding heat to prevent melting and contaminating the heat exchange tube. The upper end of the copper rod 4 is provided with a boss 401 to facilitate the copper rod 4 to be fixed on the tube plate body 1. The boss 401 is provided with a lifting ring 402 to facilitate the removal of the copper rod 4. The diameter of the copper rod 4 is the same as the diameter of the peripheral tube hole 2, and it can fit into the peripheral tube hole 2 to prevent the peripheral tube hole 2 from being oxidized and effectively protect the peripheral tube hole 2.

[0026] One end of the tungsten electrode 5 extends into the defect 6 in the pipe hole 3 to be repaired, and one end of the tungsten electrode 5 is set as a tip structure. A section of the tungsten electrode 5 close to the tip is an arc structure, and the tip and the tungsten electrode 5 form a 90° right angle, which can effectively align the defect 6 in the pipe hole 3 to be repaired for repair welding, and the fusion is better;

[0027] The local protection box 7 is arranged at the bottom of the tube sheet body 1 at a position corresponding to the tube hole 3 to be repaired, and argon gas is filled into the local protection box 7 to protect the oxidation of the weld metal and the base material during the repair welding. Since the tungsten electrode 5 is extended too long during the repair welding, the argon gas of the welding gun cannot protect the defective position of the repair welding. The bottom of the local protection box 7 is inflated for protection, and the inflation time is short, saving gas consumption.

[0028] The utility model is provided with a copper rod 4, a tungsten electrode 5 and a local protection box 7. When in use, the copper rod 4 is inserted into the peripheral tube hole 2 of the outer periphery of the tube hole 3 to be repaired, and then the local protection box 7 is placed at the position of the bottom of the tube plate body 1 corresponding to the tube hole 3 to be repaired, and argon gas is filled into the local protection box 7 during repair welding, and then the position of the defect 6 in the tube hole 3 to be repaired is found, the tip of the tungsten electrode 5 is aligned with the position of the defect 6, and the repair welding is performed using welding wire, which effectively solves the difficult processing repair welding problems of deformation, oxidation and poor fusion of the tube plate hole repair welding, and improves the quality of defect repair welding in the tube plate hole.

[0029] In summary, the method of using the special tube sheet hole internal defect repair welding tool provided in the present embodiment is as follows: when in use, the copper rod 4 is inserted into the peripheral tube hole 2 on the outer periphery of the tube hole 3 to be repaired, and then the local protection box 7 is placed at the bottom of the tube sheet body 1 at the position corresponding to the tube hole 3 to be repaired, and argon gas is filled into the local protection box 7 during repair welding, and then the position of the defect 6 in the tube hole 3 to be repaired is found, the tip of the tungsten electrode 5 is aligned with the position of the defect 6, and welding wire is used for repair welding.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A special welding tool for internal defects of tube sheet holes, characterized in that: include Tubesheet body (1); Peripheral tube holes (2) are distributed on the outer periphery of the tube holes (3) to be repaired and welded on the tube sheet body (1); A copper rod (4) inserted into the peripheral tube hole (2); A tungsten electrode (5) having one end extending into the defect (6) in the pipe hole (3) to be repaired; A local protection box (7) is arranged at a position on the bottom of the tube sheet body (1) corresponding to the tube hole (3) to be repaired, and argon gas is filled into the local protection box (7).

2. A special tube sheet hole internal defect repair welding tool according to claim 1, characterized in that: The copper rod (4) is made of copper alloy material.

3. A special tube sheet hole internal defect repair welding tool according to claim 1, characterized in that: A boss (401) is provided at the upper end of the copper rod (4), and a hanging ring (402) is provided on the boss (401).

4. A special tube sheet hole internal defect repair welding tool according to claim 1, characterized in that: The diameter of the copper rod (4) is the same as the diameter of the peripheral tube hole (2).

5. The special tube sheet hole internal defect repair welding tool according to claim 1 is characterized by: One end of the tungsten pole (5) is configured as a tip structure.

6. A special tube sheet hole internal defect repair welding tool according to claim 5, characterized in that: A section of the tungsten electrode (5) close to the tip is an arc-shaped structure, and the tip and the tungsten electrode (5) form a 90° right angle.

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