12 results about "Exothermic welding" patented technology

The utility model relates to the technical field of exothermic welding clamps, and discloses a zinc-coated steel grounding exothermic welding fixing clamp which comprises a bearing frame, first limiting grooves are symmetrically formed in the two sides of the bearing frame, second limiting grooves are formed in the side edges of the bearing frame, two welding correction assemblies are symmetrically arranged on the bearing frame, and the two welding correction assemblies are arranged on the bearing frame. The welding correcting assembly and the welding limiting assembly are arranged on the bearing frame, a first abutting plate and a second abutting plate in the welding correcting assembly can abut against and limit the two sides of a second connecting steel pipe, and the two sides of the second connecting steel pipe can abut against and limit the two sides of the second connecting steel pipe. In the process, the first connecting steel pipe and the second connecting steel pipe do not need to be corrected, supported and positioned manually, operation errors in the manual supporting process are avoided, it is guaranteed that the connecting position of the first connecting steel pipe and the second connecting steel pipe is in an absolutely stable state, then the accuracy of a welding point is improved, and the overall welding quality is improved.

The invention relates to the technical field of power system grounding protection and seismic resistance, and discloses an equipment grounding connection structure suitable for a high seismic intensity region, which comprises a copper woven belt flexible connection unit bridged between an external equipment bracket and a grounding lead-up copper bar. The unit is a prefabricated integrated assembly and comprises a middle flexible braided section, rigid ends at two ends and a local insulating sheath. The upper end of the grounding lead-up copper bar is fastened with a grounding lug plate at the bottom of the support through an anti-loosening bolt assembly, and the lower end is fused with the grounding lead-up copper bar through exothermic welding and conductive paste filling. During installation, the flexible section is kept loose, and the length allowance which is 1.2-1.5 times of the designed displacement amount is reserved. Relative displacement caused by earthquakes is absorbed through flexible geometric deformation, mechanical tension is converted into deformation energy, the problem that traditional rigid connection is prone to breakage is solved, and the physical integrity and electrical conduction safety of a grounding loop in the high-intensity earthquake environment are ensured.

The utility model relates to the technical field of exothermic welding, in particular to an exothermic welding grounding device which comprises a top cover, the top cover is adsorbed to a top opening of an upper die, a welding powder cavity is formed in the middle of the top of the upper die, a drainage channel is arranged at a top opening of the welding powder cavity, the bottom of the upper die is in threaded connection with a lower die, and the lower die is in threaded connection with the upper die. A grounding hole is formed in the middle of the bottom of the lower die, guide holes are formed in the outer walls of the left side and the right side of the lower die, supporting mechanisms are arranged at the positions, close to the guide holes, of the outer walls of the left side and the right side of the lower die, and the outer wall of the bottom end of the lower die is sleeved with an adjusting mechanism. According to the improved grounding device, the blocking piece can ensure that welding powder enters the grounding hole and the guide hole only when needed, so that the welding accuracy and reliability are guaranteed, the supporting mechanism can provide stable clamping force for the grounding wire, the grounding wire is prevented from shaking or shifting in the welding process, and the welding quality is improved. The adjusting mechanism can adjust the height and the horizontal position of the lower die, so that the whole device is more stable in the installation process.

The invention relates to the technical field of welding quality online monitoring, and discloses an exothermic welding quality monitoring method based on sensing data. Arranging a temperature sensor at a welding station to be aligned with a heat release center, and collecting a calibration temperature and an original voltage sample to generate a conversion slope and an intercept; determining sampling starting and ending according to starting and working step ending signals, forming a voltage sequence according to a sampling interval, converting temperature, generating temperature rise by taking the first temperature as a reference, and normalizing the temperature rise; self-adaptive triangular smoothing is carried out according to the number of sampling points, a computable interval is limited, and differential change rate and local second-order bending rate energy samples are constructed; samples are sorted to obtain self-baseline statistics, an abnormal index, a quality value and an abnormal time period are generated in combination with maximum energy, and a quality grade is output and filed. Cross-device comparability is achieved, noise is resisted, invalid sampling is reduced, and compared with a peak value method, process abnormity is easier to recognize and locate and traceability is achieved.

This utility model discloses a mold fixing device for exothermic welding, belonging to the technical field of exothermic welding molds. It includes a base plate, a support seat fixed to the top of the base plate, and a storage groove on the top of the support seat for easy wire welding processing. A mold body is slidably connected to the side wall of the support seat, and the end of the mold body abuts against the base plate. Two fixing blocks for connection are welded to the top of the base plate, symmetrically positioned relative to the support seat. A movable pressure plate is also provided on the top of the fixing blocks, engaging with the fixing blocks and abutting against the wire. Through grooves corresponding to the storage grooves are provided on both sides of the bottom of the mold body, with the inner walls of the through grooves slidably connected to the side walls of the exothermicly processed wire. This utility model can not only fix welding wires of different sizes, but also, through the connection of the support seat and movable grooves, complete the fixation of the mold body and the base plate, ensuring the device remains stable during operation and improving its practicality.

The utility model relates to the technical field of welding, specifically discloses a heat releasing welding mould, including first mould and second mould of first mould one side, the outer wall top of first mould is hinged with mould cover through the hinge, the outer wall of first mould is provided with the opening and closing mechanism for the opening and closing action of first mould and second mould, the outer wall of mould cover is provided with the limiting mechanism for the fixed action of mould cover and second mould. Through first mould, second mould and mould cover constitute a heat releasing welding mould body, through the opening and closing mechanism that sets up, and then effectively realized the opening and closing of first mould and second mould, and when first mould and second mould are closed, through the tension spring under the tension effect, and then avoid the problem that there is a gap when heat releasing welding, cooperate limiting mechanism, and then effectively realized the upper part of first mould and second mould is sealed, avoid the problem of opening when heat releasing.

This invention discloses a quality inspection system for exothermic solder powder, belonging to the field of exothermic solder powder inspection technology. It solves the problem of delayed brittle fracture failure of exothermic welded joints during service due to the coupling of grain boundary segregation and corrosive environment caused by inadequate control of trace impurities such as bismuth during production, coupled with the blind spots in the screening of trace components in the current quality inspection system. The system includes a data acquisition module, a data cleaning module, a standardization module, a statistical modeling module, a distance calculation module, a control limit generation module, an anomaly detection and early warning module, a model storage and management module, and a database module. This invention constructs a reference statistical model by collecting known qualified solder powder samples. After standardizing the detection indicators of a new batch of solder powder, it calculates the Mahalanobis distance between the new batch and the center of the reference model. By comparing this distance with the control limits set based on the distribution of the reference samples, it determines whether the new batch has quality anomalies.

The invention relates to a direct current network (100; 200) which has a main line (102; 202) and at least one stub (106; 204) which is electrically connected to the main line (102; 202). The direct current network (100; 200) is characterised in that a first end of the stub (106; 204) is connected to the main line (102; 202) by means of an exothermic welding method. The invention also relates to a direct current conductor connection unit (108) and to a direct current network manufacturing method (300).

This invention proposes a quality evaluation method for aluminothermic welded joints based on welding process data, belonging to the field of welding technology. The method includes: collecting on-site parameters during the aluminothermic welding process; calculating the source quality score of the aluminothermic welded joint based on the on-site parameters; and formulating a handling strategy for the aluminothermic welded joint based on the source quality score. This method significantly improves the efficiency and consistency of quality evaluation, overcomes the subjectivity and lag of manual review, accurately identifies the risk levels of different types of defects, and provides data support for differentiated flaw detection and maintenance strategies, thereby comprehensively improving the quality control capabilities of railway welded joints and the level of traffic safety assurance.

A method of controlling the ignition of exothermic weld material includes providing an exothermic welding system. The exothermic welding system includes: a controller including or connected to a battery; and a cable comprising a first end connected to a controller and a second, opposite end connected to an igniter, with a wire filament, attached to a mold holding the weld material. The method includes: receiving a wireless input signal from a portable electronic device; and in response to receiving the input signal, directing current from the battery to the second end of the cable to ignite the weld material.

This invention discloses an exothermic welding device for zinc-clad steel grounding electrodes of buried gas pipelines, belonging to the field of exothermic welding technology. Molten metal inside the reaction chamber flows into the welding cavity through a guide hole. A first interface channel for inserting the zinc-clad steel grounding electrode is machined on one side of the welding mold. A squeezing and vibration mechanism located on the outer circumference of the zinc-clad steel grounding electrode is installed inside the first interface channel. A second interface channel for inserting a connecting wire is machined on the other side of the welding mold. One end of the zinc-clad steel grounding electrode inside the welding cavity is connected to one end of the connecting wire to form the welding part. This invention, through inert gas pre-purging, can completely remove air from the welding cavity, avoiding oxidation and burn-off of the molten copper at temperatures above 2000℃ upon contact with air. This effectively reduces defects such as porosity and oxide inclusions inside the weld. The molten copper solidifies stably in an inert environment, forming a metallurgical-grade cast-welded connection, with stable and reliable conductivity and mechanical strength of the joint.