CN-121423983-B - Municipal thermal pipeline welding positioning device and method

Abstract

The invention relates to a welding positioning device and method for municipal heating pipelines, and relates to the technical field of pipeline welding auxiliary equipment. The locating frames are provided with clamping units for locating and fixing the pipeline and synchronizing units for facilitating the cooperative work of the locating frames. The invention can solve the following problems in the process of assisting the welding of the pipeline in the prior art, namely, the matching block of the synchronous unit can horizontally rotate, the horizontal included angle between the multi-positioning frames can be flexibly changed by combining the height adjustment of the multi-stage telescopic rod, the design trend of the bent pipe can be accurately reproduced, and the problem that the traditional device lacks a bent pipe angle adjusting and fixing mechanism is solved. Through the synchronous adjustment of the clamping claw I, the clamping claw II and the clamping claw III in the clamping unit, the automatic centering of the pipeline is realized, and the coaxiality of the two pipelines is ensured to be consistent with the interval of the welding part.

Inventors

• FENG BIN
• JIANG XU
• WANG YONGQING
• WANG GUIXUE
• JIA BO
• LI CHUANLING
• XU BAODE
• ZHANG XINQUAN

Assignees

• 山东华翊工程科技有限公司

Dates

Publication Date

20260508

Application Date

20251212

Claims (3)

1. 1. A welding and positioning device for municipal heat pipelines comprises a positioning frame and is characterized in that the positioning frame comprises a base and a fixed seat, the fixed seat comprises two groups of 冂 -shaped frames, and the two 冂 -shaped frames are connected through a supporting rod; the locating rack is provided with: a clamping unit for positioning and fixing the pipeline; A synchronization unit for facilitating the cooperative work of a plurality of positioning frames; the synchronous unit comprises a multistage telescopic rod horizontally arranged at the bottom of the fixed seat, a bearing plate is arranged at the telescopic end of the multistage telescopic rod, a matching block is rotatably arranged on the bearing plate, a fixed block is arranged at one end, far away from the matching block, of the fixed seat in the length direction, a positioning block is slidably arranged in the fixed block, and a butt joint groove with the shape identical to that of the matching block is formed in the positioning block; the clamping unit comprises a clamping claw I and a clamping claw II which can slide along the height direction of the positioning frame, and two groups of clamping claws III which can slide along the width direction of the positioning frame; the second clamping claw comprises a lifting rod which is arranged at the top of the 冂 -shaped frame in a sliding manner, the lifting rod penetrates through the 冂 -shaped frame, and one end, close to the first clamping plate, of the lifting rod is hinged with the second clamping plate; A first control piece for controlling the lifting of the two clamping plates II is arranged between the tops of the two 冂 -shaped frames, and comprises a driving gear which is rotatably arranged at the top of the 冂 -shaped frame and sleeved on the outer side of the lifting rod to be in threaded connection with the lifting rod; A limiting groove extending along the axial direction of the lifting rod is formed in the side wall of the lifting rod, a through hole for the lifting rod to pass through is formed in the top of the 冂 -shaped frame, and a limiting block for sliding guide of the limiting groove is fixed in the through hole; The 冂 -shaped frame is also provided with a synchronizing piece for controlling the two driving gears to synchronously rotate, the synchronizing piece comprises an extension rod fixedly connected between the tops of the two 冂 -shaped frames, the synchronizing rod is slidably arranged along the axial direction of the extension rod, and both ends of the synchronizing rod are fixedly connected with driven racks which are meshed with the driving gears; Two groups of driving screws are arranged between the two support rods, two ends of each driving screw are arranged on a fixed seat arranged on the support rod through bearings, a driving gear is arranged on one driving screw through a spline, and a rack section meshed with the driving gear is arranged on the synchronous rod; the clamping claw III comprises sliding shafts symmetrically arranged on the 冂 -shaped frame along the width direction of the positioning frame, the two sliding shafts penetrate through the 冂 -shaped frame, and the corresponding end is hinged with the clamping plate III; The positioning frame is provided with a control piece for controlling the two clamping plates and the three clamping plates to do relative movement; The control piece comprises fixed rods symmetrically arranged along the base, and the accommodating groove extends along the axis direction of the driving screw; The fixed rod is provided with a containing groove, the containing groove is rotationally provided with a synchronous screw rod, the synchronous screw rod is symmetrically provided with a moving seat sliding in the containing groove in a threaded manner, the driving screw rod is symmetrically provided with a moving rod, and one end of the moving rod, which is far away from the driving screw rod, is connected with the moving seat through a clamping piece; The clamping piece comprises an L-shaped clamping block, a positioning groove penetrating through the inside and the outside is formed in the movable seat, the clamping block is slidably arranged in the positioning groove along the length direction of the positioning groove through a telescopic rod, a T-shaped matching groove is formed in the side wall of one end, close to the movable seat, of the movable rod, and the clamping block is movably clamped with the matching groove.
2. 2. The welding and positioning device for municipal heat pipes according to claim 1, wherein the first clamping claw comprises a first clamping plate symmetrically arranged along the length direction of the fixing seat, the fixing seat is symmetrically provided with a mounting groove along the length direction of the fixing seat, a driving shaft is rotationally arranged in the mounting groove, a driving groove is rotationally arranged in the driving shaft, the first clamping rod is connected in the driving groove in a threaded manner, and the first clamping plate is hinged to one end of the first clamping rod, which is positioned outside the driving groove.
3. 3. A welding positioning method for municipal heat pipelines, which adopts the welding positioning device for municipal heat pipelines according to any one of claims 1-2, and is characterized in that the welding positioning method is as follows: S1, preparing a device, namely moving a positioning frame to a pipeline welding position through a universal wheel with a brake and locking the positioning frame; s2, preliminary alignment, namely placing welding ends of two sections of pipelines to be welded at two ends of a base respectively, and enabling the butt joint parts to be preliminarily aligned; s3, pipeline fixing, namely operating the clamping unit to enable the first clamping claw and the second clamping claw to synchronously clamp the pipeline from the upper direction and the lower direction, and enabling the third clamping claw to clamp the pipeline from the width direction, so that the pipeline is formed to be annularly coated and fixed; s4, co-locating and welding, namely, for a straight pipeline, ensuring that all pipelines are in the same straight line by adjusting multi-stage telescopic rods in synchronous units of a plurality of locating frames, for a bent pipeline, locating the pipeline according to a preset trend by rotating a matching block and adjusting the multi-stage telescopic rods to adjust the horizontal included angle between the adjacent locating frames, and then welding.

Description

Municipal thermal pipeline welding positioning device and method Technical Field The invention relates to the technical field of pipeline welding auxiliary equipment, in particular to a municipal heating power pipeline welding positioning device and method. Background The municipal heating pipeline is used as a core component of the urban central heating system, and the quality of the welded joint of the municipal heating pipeline is directly related to the tightness, the bearing capacity and the long-term operation safety of the whole pipe network system. In the process of installing and maintaining pipelines, two sections of pipelines are often required to be subjected to butt welding on site. The process requires that the two pipe ends to be welded must realize accurate axis centering and uniform welding seam clearance, and any tiny misalignment, misalignment or uneven clearance can cause welding stress concentration, poor welding seam forming, even occurrence of fatal defects such as incomplete penetration, slag inclusion and the like, and become hidden danger of leakage or burst of the pipeline under the conditions of thermal stress circulation and pressure load. However, in the prior art, although the positioning device has application, the positioning device is influenced by a plurality of pipeline specifications and complex construction scenes, and has two core problems, on one hand, the pipeline is inconvenient to match and clamp with the positioning mechanism, the heating power pipeline is heavy, heavy equipment is required to be transported, and the existing positioning platform is difficult to fix and align. On the other hand, the bent pipe is difficult to position, the straight bent pipe is common in welding and high in interface precision requirement, but the existing device is free of a special positioning mechanism for the bent pipe, or cannot support bending to cause deflection, or multiple mechanisms are free of uniform reference and difficult to coordinate, and the universality is poor, special tools are needed, and a complex scene is limited. Chinese patent publication No. CN112338433a discloses a pipe welding positioning device. The pipeline welding positioning device comprises a support frame, a sliding sleeve and a clamping mechanism, wherein the support frame comprises a frame and support legs used for supporting the frame, the frame comprises oppositely arranged cross beams and oppositely arranged longitudinal beams, two ends of each longitudinal beam are respectively fixed with the two cross beams, the sliding sleeve is arranged on each longitudinal beam in a sliding mode and connected with the clamping mechanism, the clamping mechanism is used for clamping a pipeline, the position of the pipeline is changed by adjusting the position of the sliding sleeve on each longitudinal beam, and therefore the butt joint precision of the pipeline is improved, and the welding quality of the pipeline is improved. However, the above-mentioned pipe welding positioning device still has some disadvantages in the actual use process: 1. in the prior art, the linear position of a single pipeline is mainly adjusted by virtue of a sliding sleeve and a telescopic piece, namely the single pipeline moves along the directions of a longitudinal beam and a transverse beam, but the single pipeline lacks an angle adjusting and fixing mechanism for an elbow pipe, and a stable positioning reference cannot be provided for the bent pipeline. 2. The existing clamping mechanism adopts a locking piece which needs manual operation to lock two clamping arms, has no self-centering function, cannot ensure automatic centering of a pipeline during clamping, completely depends on experience of an operator to adjust the central position of the pipeline, and is difficult to ensure precision. Therefore, under the above stated viewpoints, the welding positioning device for the heat distribution pipeline has important significance in improving and perfecting the existing welding positioning device for the heat distribution pipeline, not only can synchronously clamp and fix the bent and linear pipelines, but also can synchronously center the pipelines to be welded in the clamping process, and ensures the welding precision. Disclosure of Invention In order to solve the problems, the invention provides a welding positioning device and a welding positioning method for municipal heating pipelines. On the one hand, the municipal administration heating power pipeline welding positioning device comprises a positioning frame, wherein the positioning frame comprises a base and a fixing seat, the fixing seat comprises two groups 冂 of frames, and the two 冂 frames are connected through a supporting rod. The locating rack is provided with: and the clamping unit is used for positioning and fixing the pipeline. And a synchronization unit which is convenient for the cooperative work of a plurality of positioning frames. The synchronous unit compr