21results about "Testing vessel construction" patented technology

This utility model provides a transformer partial discharge testing device, mainly relating to the field of transformer technology. The device includes a housing and metal electrodes. The metal electrodes are slidably disposed on the top of the housing. A rectangular cylinder is fixedly disposed on the top of the housing. A support frame is slidably disposed inside the rectangular cylinder. A limiting block is hinged to the outside of the rectangular cylinder, and the limiting block abuts against the side of the support frame. An L-shaped fixing plate is fixedly disposed on the outside of the rectangular cylinder, and a DC solenoid valve is fixedly disposed on the L-shaped fixing plate. The end of the DC solenoid valve abuts against the limiting block. The advantages of this utility model are: after the test is completed or the monitoring system detects an abnormality, the metal electrodes can be quickly and safely separated from the transformer, effectively avoiding the risk of electric shock due to residual charge and greatly ensuring the safety of operators.

This disclosure relates to the field of insulating material testing, including a method and system for evaluating the nonlinear strength of insulating materials based on high-frequency component analysis. The method involves applying an excitation electrical signal of a first preset frequency to the insulating material under test; acquiring the response signal obtained by the insulating material in response to the excitation electrical signal based on a second preset frequency; performing time-frequency transformation on the response signal to obtain the frequency characteristics of various preset higher harmonic components; and determining the evaluation result of the nonlinear strength of the insulating material based on the frequency characteristics of these higher harmonic components. This method allows for obtaining the evaluation result of the nonlinear strength with a single excitation and response acquisition; it eliminates the need for multi-voltage point step testing in traditional techniques, shortening the testing cycle, improving testing efficiency, and enabling efficient, accurate, and standardized determination of the nonlinear strength evaluation result.

The application discloses a kind of concentrator pressure-withstanding verification device, belong to concentrator verification technical field, to solve in the process of pressure-withstanding verification to concentrator, when early insulation hidden danger such as micro flashover, local weak discharge occurs in concentrator insulation part, it is not easy to be captured in time by traditional monitoring module, and then cause potential insulation defect missed detection problem, application includes pressure-withstanding detection table, two two-way gas path components are installed in pressure-withstanding detection table side, a plurality of support components are arranged in pressure-withstanding detection table, concentrator main body is arranged in support component, terminal row is fixedly connected at the bottom of concentrator main body, two groups of sealing components are arranged in pressure-withstanding detection table, the gas in sealing cavity can be driven directional closed loop circulation by the application, ozone generated by weak discharge is transported to detection site quickly, concentration change is captured accurately, field electromagnetic interference is avoided, the detection sensitivity of micro flashover and early weak discharge is improved, and the missing rate of misjudgment is reduced.

The application provides an oil bubble discharge experiment platform comprising an optical diagnosis system, realizes quantitative research on bubble discharge characteristics of transformer oil under different parameters, and can observe clear images in a bubble discharge process, and the experiment platform comprises: a power supply system for power supply, wherein the power supply system comprises a test transformer, a protection resistor and a fast protection module; an experiment cavity for containing transformer oil; an electrode system installed in the experiment cavity and used for constructing a uniform electric field oil gap or a non-uniform electric field oil gap; a bubble generating system used for adding bubbles to the oil gap; a partial discharge detection system used for collecting partial discharge signals and analysis; and an optical diagnosis system used for observing the bubble discharge process of the oil gap in the experiment cavity; wherein the partial discharge detection system is further connected with the fast protection module, and is used for outputting signals to the fast protection module when a discharge or breakdown event occurs, so that the power supply system is cut off by the fast protection module.

This invention relates to the field of insulation testing technology for power system equipment, and particularly to a coaxial electrode structure and a high-voltage insulation testing device using this structure. The coaxial electrode structure includes a cylindrical conductor with an annular protrusion extending radially outward on its outer circumference. This annular protrusion constitutes the discharge portion of the cylindrical conductor. The dimensions of the annular protrusion (including outer diameter and length) are set by electric field simulation based on the physical properties of the environmentally friendly insulating gas. After the cylindrical conductor is placed in a test cylinder filled with the specified environmentally friendly insulating gas, a high voltage is applied to the conductor. Based on the gas discharge law, the annular protrusion constitutes the discharge portion of the cylindrical conductor, causing the discharge to occur at a predetermined location, namely between the annular protrusion and the inner wall of the test cylinder, thereby forming an air gap breakdown. This allows for the acquisition of the discharge laws of environmentally friendly insulating gases with different pressures, compositions, and proportions, yielding the air gap insulation breakdown voltage of the insulating gas used in GIS (Gas Insulation System), thus providing support for the insulation structure design of GIS products.

The present invention relates to a method for testing insulation resistance of a stator, and a method for testing insulation resistance of a stator and performing post-processing includes: a step of preparing a sample manually by an operator for a test; a step of testing insulation resistance by measuring whether a resistance value is equal to or greater than a predetermined value by applying a predetermined test voltage after settling the sample in purified water and maintaining the sample under a predetermined pressure; a spin step of removing moisture at a predetermined rotation speed for a predetermined period of time by putting the tested sample in a device that provides rotational force; an air-showering step of removing moisture from the sample by applying compressed air for a predetermined period of time; an induction-heating step of removing moisture by applying heat for a predetermined period of time; a drying step of drying and removing moisture by applying hot air to the sample for a predetermined period of time; a cooling step of stabilizing the sample until the sample reaches room temperature; and a step of removing the sample that has completed all of the steps and putting the sample into a manufacturing line by the operator. According to the present invention, there can be provided a method for testing insulation resistance which is performed on a stator of a motor or a compressor and a method for quickly and efficiently putting the sample used in a completed test back into a manufacturing line.

This invention relates to a method for testing and post-processing the insulation resistance of motor stators, comprising: a preparation step, in which a worker manually prepares a sample for testing; an insulation resistance testing step, in which the sample is settled in pure water and kept under a specified pressure, and then a specified test voltage is applied to determine whether a resistance value above a specified value is obtained; a rotation step, in which the sample after the test is completed is placed into a device that provides rotational force and the moisture is removed at a specified rotational speed for a specified time; an air shower step, in which compressed air is applied for a specified time to remove moisture from the sample; an induction heating step, in which heat is applied for a specified time to remove moisture; a drying step, in which hot air is applied to the sample for a specified time to dry and remove moisture; a cooling step, in which the sample is stabilized to reach room temperature; and an input step, in which a worker removes the sample after all steps are completed and inputs it into the manufacturing production line.

The invention relates to a method for testing electrical components for medium-voltage or high-voltage systems using a more environmentally friendly dielectric fluid, as well as the use of the method in medium-voltage, high-voltage or partial discharge testing.

The utility model relates to automatic equipment technical field discloses an automatic high -voltage test equipment, first, this equipment can realize to the positive pole test area and the negative pole test area of the device of each face of all -round, multi -angle electrode coverage and test of waiting to be measured, effectively solved the test omission problem existing in the prior art, ensured the comprehensiveness and accuracy of test result. Secondly, automation operation has improved test efficiency significantly, reduced manual intervention, can satisfy the demand of large -scale production. Besides, the equipment avoids the test error due to inaccuracy or uneven pressure by precisely controlling the contact of electrode and the device under test, improves the stability and repeatability of test result. More importantly, the direct contact of test personnel and high -voltage electrode is reduced by automatic design, the risk of electric shock is reduced significantly, and the personal safety of test personnel is ensured.

The utility model relates to automatic equipment technical field discloses an insulation material high -voltage testing machine through setting up bearing positioning device, lifting device, electrode device and vision device, has realized accurate positioning and efficient test to insulation material. First, vision device can detect the deflection amount of insulation material position, cooperates the bearing positioning module and corrects the position of insulation material to ensure that insulation material is in the accurate position before testing, improves the positioning accuracy of testing, avoids the problem that the test result is not accurate because of position deviation. Secondly, lifting device drives electrode device and insulation material contact or separate, makes the application of high -voltage electric signal more stable and reliable, further guarantees the accuracy of test. Besides, this improved high -voltage testing machine can effectively reduce the risk of damaging test equipment and sample because of inaccurate positioning, improves the security and life of equipment, also promotes the test efficiency simultaneously.

A method for testing insulation resistance of a stator and performing post-processing includes preparing a sample by an operator, testing insulation resistance by measuring whether a resistance value is equal to or greater than a predetermined value by applying a predetermined test voltage after settling the sample in purified water and maintaining the sample under a predetermined pressure; removing moisture at a predetermined rotation speed for a predetermined period of time by putting the tested sample in a device providing rotational force, removing moisture from the sample by applying compressed air for a predetermined period of time; removing moisture by applying heat for a predetermined period of time, drying and removing moisture by applying hot air to the sample for a predetermined period of time; stabilizing the sample, and removing the sample that has completed all of the steps and putting the sample into a manufacturing line by the operator.

The application belongs to the technical field of ignition risk test, and provides a solid material electric arc ignition test device for electric and electronic products, which comprises a main body provided with a test bin and a test support movably arranged in the test bin, the test support is provided with an upper electrode clamping assembly, a lower electrode clamping assembly and a sample clamping assembly, the upper electrode clamping assembly and the lower electrode clamping assembly are both provided with a conductive clamping rod capable of lifting movement, the sample clamping assembly is provided with a sample clamping block capable of horizontal movement, the main body is internally provided with a test wiring loop, and the conductive clamping rod is connected to the test wiring loop. The solid material electric arc ignition test device for electric and electronic products provided by the application improves the accuracy and precision of the electrode spacing and the spacing between the sample and the electrode in the test process, thereby ensuring the accuracy and reliability of the material performance determination result, and has high reproducibility, eliminates the error caused by manual distance adjustment operation, and improves the test efficiency.

The application discloses a kind of plastic material high voltage breakdown testing device, belong to high voltage breakdown testing device technical field, the device includes test explosion-proof box and its inside horizontal movement mechanism, lower immersion mechanism, lifting movement mechanism, horizontal movement mechanism drives the oil bath tank containing insulating oil and lower electrode moves to test position, lower immersion mechanism when oil bath tank is in position, it is immersed in oil and contacted with lower electrode by the sample to be measured fixed in sample placing mechanism, lifting movement mechanism controls upper electrode and automatically drops and contacts sample, box door mechanism closes import and export.The application has the characteristics that test safety, accuracy is high, and test efficiency is high.

The utility model discloses an electrical insulation safety performance testing device which comprises a box body, four corners of the bottom end of the box body are fixedly connected with supporting ground feet, the front side of the box body is provided with a sealing door, two ends of the rear side in the box body are provided with lifting assemblies, the front ends of the lifting assemblies are provided with first adjusting assemblies, and the first adjusting assemblies are provided with second adjusting assemblies. Second adjusting assemblies are arranged on the two sides of the front end of the first adjusting assembly. According to the utility model, the electrical equipment can be clamped and fixed through the arranged clamping assembly, the height of the detection assemblies can be adjusted through the arranged lifting assembly, the distance between the detection assemblies can be adjusted through the arranged first adjusting assembly, and the front and back positions of the detection assemblies can be adjusted through the arranged second adjusting assembly. The inclination angle of the detection head can be adjusted through the arranged brake motor, so that the detection head can be in contact with the shell of the electrical device at different positions and angles, and then insulation safety performance testing can be carried out for many times.

The provided is a method for detecting AC and DC arc faults based on Rogowski coil magnetic coupling resonance, where a line to be detected passes through a uniformly wound Rogowski coil, and by adjusting the dimensions of the framework structure, the number of winding turns, and the values of a parallel-connected inductor and capacitor, a specified resonant frequency is obtained; when an arc fault occurs in the line to be detected, the Rogowski coil amplifies the characteristic frequency band signal corresponding to the resonant frequency by means of magnetic coupling resonance, so as to detect an arc fault state.

This invention discloses a method for evaluating the thermal aging of an organosilicon insulation system for a motor stator coil, relating to the field of insulation material technology. The method includes the following steps: S1, using frequency domain dielectric spectroscopy (FDS) to perform non-destructive testing on the motor's organosilicon insulation system, obtaining curves showing the changes in the real and imaginary parts of the complex dielectric constant ε' and ε'' with frequency; S2, using Cole-Cole plots and slope analysis to determine that the insulation system mainly exhibits a combination of single relaxation and jump conductance processes within the test frequency band, fitting the FDS curves with a Havriliak-Negami model that includes a jump conductance term, and extracting the relaxation intensity change Δε as a key parameter for thermal aging evaluation; S3, combining thermal aging experiments and breakdown voltage tests to establish a quantitative relationship between the relaxation intensity change Δε and the breakdown voltage, setting a threshold for the relaxation intensity change Δε as the criterion for determining the end point of insulation aging. This invention innovatively proposes applying frequency domain dielectric spectroscopy to the testing of organosilicon insulation systems for motors.

This invention discloses a variable-curvature oil-paper insulation electrode model and method. The test model includes components such as a ground electrode terminal, a ground electrode fastening bolt, a moving rod, a high-voltage electrode terminal, a high-voltage electrode fastening bolt, a ground electrode slider, a ground electrode epoxy board, and a high-voltage electrode epoxy mold. The high-voltage electrode epoxy mold conformally fits the high-voltage electrode. During use, the curvature of the high-voltage electrode can be adjusted by the customized epoxy mold. The invention also provides a corresponding test method. This invention effectively solves the problem of inaccurate breakdown field strength test results in ordinary oil-paper insulation breakdown tests due to the inability to reproduce the curved insulation structure inside the transformer. It provides a high-voltage electrode device for studying the breakdown characteristics of oil-paper insulation materials under strong electric fields, and has significant engineering practical value for in-depth research into the failure mechanism of transformer main insulation systems and improving insulation design levels.

The present invention relates to a handheld device for detecting electrostatic discharge, comprising an evaluation unit and a cable antenna (1;1') made from a coaxial cable, wherein the cable antenna is formed in a coil shape having n windings (2;2') with n≧2, each winding (2;2') is wound around a winding axis, each winding has a diameter of less than 30 cm, and the windings of the cable antenna are preferably separated from each other by at least one spacer.

The application provides a test tool for gas insulation characteristic research, and belongs to the technical field of electric performance test devices for testing dielectric strength or breakdown voltage. The test tool for gas insulation characteristic research comprises a sealed container, a high-voltage electrode mounting part for mounting a high-voltage electrode is arranged on one side wall of the sealed container, a grounding electrode mounting part for mounting a grounding electrode is arranged on the opposite side wall, at least one of the high-voltage electrode mounting part and the grounding electrode mounting part is a movable part capable of moving towards the other, and the test tool for gas insulation characteristic research further comprises a simulation part for being fixed in the sealed container and for simulating an actual working condition that is beside the high-voltage electrode and the grounding electrode and can affect the electric field between the high-voltage electrode and the grounding electrode. After the simulation part is arranged, a more accurate actual working condition can be simulated, the test result of the test tool is more accurate, and the reference value of the test result can be improved.