18 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 utility model discloses an exothermic welding clamp, which belongs to the technical field of exothermic welding, and comprises an exothermic welding mould main body, and a clamping component and a fixing plate which are used for clamping and fixing the exothermic welding mould main body, the clamping component and the fixing plate are arranged on two sides of the exothermic welding mould main body, and the side surface of the fixing plate is fixedly connected with a connecting plate. A limiting plate is fixedly connected to the end face of the supporting plate, an iron moving plate is arranged on the side face of the limiting plate, the side face of the moving plate is in embedded sliding connection with the supporting plate, a through groove is formed in the top face of the moving plate, a limiting rod is slidably connected to the inner wall of the through groove of the moving plate, and a magnetic plate is fixedly connected to the top face of the limiting rod; according to the heat release welding clamp, the relative positions of the fixed plate and the clamping plate are conveniently and rapidly adjusted in a large interval, and the use convenience of the heat release welding clamp 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 invention is suitable for the technical field of rail traffic, and provides a steel rail thermit welding seam quality evaluation method based on machine learning and multi-factor monitoring, and the method comprises the following steps: collecting thermit welding process data, and storing the collected data in a field welding management system; based on the collected data, a random forest algorithm is utilized to construct an exothermic welding seam quality evaluation model; a historical thermit welding process data training model is used, a mapping relation between all factors in the welding process and weld defects is established, the importance of features is evaluated by calculating the splitting contribution degree of each feature in a decision tree, and the influence weight of all the factors is determined; and based on the influence degree weight matrix of each factor, determining a score deduction mechanism when each factor does not reach the standard in combination with expert experience according to an exothermic welding quality evaluation rule, and constructing a scientific welding seam quality evaluation system. According to the method, the welding multi-factor data is comprehensively considered, and the welding seam quality quantitative evaluation method based on data driving can be provided.

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.

1. Name of this design product: Exothermic Welding Cup Packaging Box (E‑plus2.0). 2. Purpose of this design product: A packaging box for storing exothermic welding cups. 3. The key design point of this design product lies in the combination of shape and pattern. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

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 invention discloses an exothermic welding mold with replaceable welding cavity modules. The exothermic welding mold is composed of a medicine storage reaction mold, an upper welding cavity module and a lower welding cavity module. The medicine storage reaction die holder is embedded in the top of the upper welding cavity module, and the bottom of the upper welding cavity module and the top end of the lower welding cavity module are oppositely embedded. An upper cavity die arranged at the bottom of the upper welding cavity module and a lower cavity die arranged at the top end of the lower welding cavity module are arranged in an oppositely-embedded mode, and the oppositely-embedded upper cavity die of the upper welding cavity module and the lower welding cavity module forms a first lower welding cavity module with a linear welding cavity, a second lower welding cavity module with a T-shaped welding cavity and a third lower welding cavity module with a cross-shaped welding cavity. The medicine storage reaction module and the upper welding cavity module can be repeatedly used, so that the manufacturing cost is saved; only the lower welding cavity module at the bottom needs to be replaced, welding of related joints of the linear mold cavity, the T-shaped mold cavity and the cross-shaped mold cavity can be achieved, operation is easy and convenient, and a plurality of whole molds do not need to be carried; and the mold cavity is fixed through the positioning pins, assembling and disassembling are convenient, and the working efficiency is improved.

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 ignition system holds a quantity of a reaction mixture in a hopper. The hopper is closed at the bottom by a movable gate. When the gate is opened, powder falls from the hopper, though a passage, and through an ignition chamber. High voltage electrodes are provided in the ignition chamber. As the powder falls through the ignition chamber, the electrodes are energized, generating an electrical arc. The arc ignites the falling powder. The ignited powder falls from the bottom of the chamber and into the reaction chamber of an exothermic mold, where the ignited powder initiates a thermite reaction that generates molten metal to form an exothermic weld.

The utility model discloses an antioxidant copper bar grounding electrode, which comprises a copper bar grounding electrode body fixedly welded with galvanized flat steel by adopting an exothermic welding technology, metal protective coatings are arranged on the outer sides of the copper bar grounding electrode body and the galvanized flat steel, and antioxidant coatings are arranged on the outer sides of the metal protective coatings. According to the utility model, through the arrangement of a series of structures, a protection layer can be formed on the outer sides of the copper bar grounding electrode body and the galvanized flat steel through the metal protection coating and the anti-oxidation coating for anti-oxidation protection; the anti-oxidation protection mechanism can be fixed to the welding portion of the copper bar grounding electrode body and the galvanized flat steel in a simple pushing mode to conduct sealing shielding protection on the copper bar grounding electrode body and the galvanized flat steel, the anti-oxidation effect is achieved, in addition, the copper bar grounding electrode body can be vertically guided in the using process, it can be guaranteed that the copper bar grounding electrode body is vertically inserted into the ground, and the service life of the copper bar grounding electrode body is prolonged. And the condition that normal use is influenced by insertion inclination is avoided.

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.