CN-224209424-U - Be used for fixed frock of tube bank welded

CN224209424UCN 224209424 UCN224209424 UCN 224209424UCN-224209424-U

Abstract

The application provides a fixing tool for welding a tube bundle, which comprises a welding table, a fixing frame, a fixing block, a central tube bundle and a positioning baffle, wherein the welding table is provided with a plane extending horizontally, the positioning baffle is uniformly distributed on the welding table in a fan shape, the positioning baffle comprises a mounting part and a supporting part, the mounting part is fixedly connected with the welding table, the supporting part is abutted against the outer ring surface of the central tube bundle, and the positioning baffle is positioned and supported when a branch tube is welded. Through the triangle location structure of two symmetrical mount and fixed block, the horizontal bending end at cooperation center tube bank both ends realizes the axial zero clearance locking of semi-annular main pipe. Compared with the traditional V-shaped block positioning mode, the positioning mode is more firm. The graduation location makes the scale mark on welding bench surface form polar coordinate benchmark net, and location separation blade is along graduation evenly distributed, when changing pipe diameter specification, only need according to the graduation removal location separation blade position, frock reset time shortens. The tube bundles with different pipe diameter ranges can be matched with the same tool, so that the utilization rate of equipment is greatly improved.

Inventors

LI LINTIAN
Min Chengcheng

Assignees

上海金日冷却设备有限公司

Dates

Publication Date: 20260508
Application Date: 20250723

Claims (8)

1. Be used for fixed frock of tube bank welding, a serial communication port includes: a welding station having a horizontally extending plane; The two fixing frames are symmetrically arranged at one end of the welding table; The fixed block is arranged at the other end of the welding table; the central tube bundle is semi-annular, and the two fixing frames are cooperated with the fixing blocks to fix the central tube bundle; the positioning baffle plates are uniformly distributed on the welding table along the fan shape; the positioning baffle plate comprises a mounting part and a supporting part, wherein the mounting part is fixedly connected with the welding table, and the supporting part is propped against the outer annular surface of the central tube bundle so as to position and support the branch tube during welding.
2. The fixture for tube bundle welding according to claim 1, wherein the mounting portion of the positioning baffle is fixed to the welding table by a set of first screws.
3. The fixture for welding a tube bundle according to claim 2, wherein the mounting portion and the supporting portion of the positioning baffle are in an L shape perpendicular to each other.
4. The fixture for tube bundle welding as set forth in claim 1, wherein the two ends of the central tube bundle are bent outwardly to form horizontal ends that abut the fixture to position the central tube bundle.
5. The fixture for tube bundle welding according to claim 4, wherein the fixing frame is fixed to the welding table by a second screw.
6. The fixture for tube bundle welding according to claim 1, wherein graduation marks are provided on the welding table.
7. The fixture for tube bundle welding of claim 6, wherein the positioning baffle plates are evenly distributed along the graduation marks.
8. The fixture for welding a tube bundle according to claim 1, wherein the welding table, the fixing frame and the positioning baffle are made of aluminum alloy materials.

Description

Be used for fixed frock of tube bank welded Technical Field The application relates to the technical field of pipeline welding manufacture, in particular to a fixing tool for tube bundle welding, which is particularly suitable for annular welding scenes of multiple branch pipes and a central main pipe of petrochemical industry, energy equipment and the like. The quick clamping and high-precision alignment of the tube bundles are realized through the modularized positioning structure, and the problem of position precision in the welding of complex tube systems is solved. Background In the manufacture of large-scale equipment such as pressure vessels, heat exchangers and the like, tube bundle welding is a core process link. The structure generally comprises a central main pipe and a plurality of radial branch pipes to form an annular pipe bundle system, the included angles of the axis of all the branch pipes and the main pipe are required to be consistent during welding, the circumferential distribution is uniform, and the weld joint gaps meet the process requirements. The traditional fixing mode has obvious defects: 1. The positioning accuracy is insufficient, and when the central tube is fixed by adopting a simple V-shaped block or a universal fixture, the radial displacement of the arc-shaped tube section cannot be effectively restrained. The welding heat input causes the thermal deformation of the main pipe, the positioning reference of the branch pipe is out of alignment, and the welding seam is offset or even interfered. 2. The supporting stability of the branch pipes is poor, the branch pipes are fixed independently by point type stop irons in the prior art, and a co-positioning mechanism for curvature of the main pipe is lacked. The height of the stop iron needs to be manually adjusted one by one, and the overhanging section at the tail end of the branch pipe is easy to droop, so that the unfused defect rate of the root part of the welding line is increased. Especially, when the thin-wall pipe is welded, point load is easy to cause indentation of the pipe wall, and repair welding and grinding are needed. 3. The tool has the limitation of adaptability, and the fixed stop iron cannot adapt to tube bundle systems with different tube diameters. When the product specification is replaced, the whole disassembly tool is needed, the position of the reset stop iron depends on experience positioning, and no quantitative reference exists. In view of the above, there is a need to develop a welding-dedicated tool that has high-precision positioning, adaptive support, and quick-change type. Disclosure of utility model The application provides a fixing tool for tube bundle welding, which solves the problems of insufficient tube bundle welding positioning precision and poor support stability of a branch tube during welding in the prior art. The application adopts the following technical scheme that the fixing tool for welding the tube bundles comprises the following components: a welding station having a horizontally extending plane; The two fixing frames are symmetrically arranged at one end of the welding table; the fixed block is arranged at the other end of the welding table; The central tube bundle is semi-annular, and the two fixing frames are cooperated with the fixing blocks to fix the central tube bundle; the positioning baffle plates are provided with a plurality of positioning baffle plates which are uniformly distributed on the welding table in a fan shape; The positioning baffle plate comprises a mounting part and a supporting part, wherein the mounting part is fixedly connected with the welding table, and the supporting part is propped against the outer ring surface of the central tube bundle so as to position and support the branch tube during welding. Preferably, the mounting portion of the positioning baffle is fixed to the welding table by a set of first screws. Preferably, the mounting part and the supporting part of the positioning baffle are mutually perpendicular L-shaped. Preferably, the two ends of the central tube bundle are outwards bent to form horizontal ends, and the horizontal ends are propped against the fixing frame to position the central tube bundle. Preferably, the fixing frame is fixed with the welding table through a second screw. Preferably, the welding table is provided with graduation marks. Preferably, the positioning baffle plates are uniformly distributed along the scale marks. Preferably, the welding table, the fixing frame and the positioning baffle are made of aluminum alloy materials. The fixing tool provided by the application systematically solves the industry pain points in the background technology through structural innovation design, and has the following specific effects: The central tube bundle cooperative fixing mechanism realizes the axial zero-clearance locking of the semi-annular main tube by matching the triangular positioning structures of the two symmetric