CN111965506A - Tracking and electric erosion resistance test equipment and test method - Google Patents
Tracking and electric erosion resistance test equipment and test method Download PDFInfo
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- CN111965506A CN111965506A CN202010832534.6A CN202010832534A CN111965506A CN 111965506 A CN111965506 A CN 111965506A CN 202010832534 A CN202010832534 A CN 202010832534A CN 111965506 A CN111965506 A CN 111965506A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1245—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of line insulators or spacers, e.g. ceramic overhead line cap insulators; of insulators in HV bushings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
Abstract
The invention discloses a device and a method for testing tracking resistance and electric erosion resistance, which comprises a control area, an electric area and a test area; the electric area comprises a resistor, a stepping motor and an alternating current/direct current transformer; the voltage transmitter drives the stepping motor to regulate voltage, and then test voltage is output through the AC/DC transformer; the AC/DC transformer, the resistor and the test sample are electrically connected to form a test loop; the resistor is provided with a resistance replacement control unit, and the PLC control element is electrically connected with the resistance replacement control unit; the test area is provided with a test device, and the test device comprises a water tank, a peristaltic pump, a liquid dropping bracket and a sample bracket; the sample is arranged on a sample bracket, and the dropping liquid bracket is provided with a dropping liquid port; the peristaltic pump has a flow rate control unit; the PLC control element is electrically connected with the flow rate control unit; the PLC controls the peristaltic pump to pump the polluted liquid in the water tank, and the polluted liquid is dripped onto the sample from the dripping opening through the dripping hose. The device effectively guarantees that the test result has more validity.
Description
Technical Field
The invention belongs to the field of high-voltage electrical appliance tests, and relates to a device and a method for testing electric leakage tracking resistance and electric corrosion loss resistance.
Background
In the composite insulator test, the leakage tracking resistance and the electrical erosion resistance test of the umbrella cover material become widely adopted test methods in the standard of insulators at home and abroad. The process that the surface of the composite insulating material is continuously deteriorated due to the discharge of a local area and forms a conductive or partial conductive channel is simulated by applying voltage under the corrosion of the polluted liquid, so that the electric corrosion resistance of the composite insulating material is inspected, and the method has great significance for the reliable operation of the composite insulator. In the test, the installation mode of the sample adopts an inclined plane method, and the inclined plane method can randomly adjust the flow rate of the polluted liquid and the value of the applied voltage according to the test requirement, so that the actual condition of the electric arc is simulated in a larger range.
The anti-tracking and electric erosion test of the umbrella cover material in the national standard has two types of specified test methods: constant electrographic voltage methods and step-by-step electrographic voltage methods. The constant electrographic voltage method is to observe the damage of the sample under a constant voltage for 6 hours. According to the standard, in this method, since the voltage is not changed in one test, the resistance value of the resistor connected in series and the flow rate of the polluted liquid are also fixed, and the equipment can be adjusted only once before the test.
The step-by-step electrographic voltage method is that after initial voltage is applied, the voltage is increased step by step at 250V per hour until damage occurs, the voltage is changed once per hour, the resistance value of the corresponding series resistor and the flow rate of the polluted liquid are also changed, and the resistance value and the flow rate of the polluted liquid need to be continuously adjusted in the whole test process so as to meet the standard requirement. Therefore, accurate and real-time control of the resistance value and the flow rate of the polluted liquid is an important guarantee for guaranteeing the test accuracy and authenticity.
At present, most parts of the existing electric leakage tracking resistance and electric erosion resistance test equipment adopt a fixed connection mode, and the liquid dropping mode is a propelling needle cylinder type liquid dropping mode, so that the series resistance needs to be manually replaced and the flow rate of the polluted liquid needs to be adjusted. The device can basically meet the test requirement of a constant electrographic voltage method, but the precision of the dropping speed cannot be further ensured, and the sample is easily limited to the hole opening position during installation. When a step-by-step electric marking voltage method test is carried out, multiple times of power failure are needed to manually replace the series resistor and adjust the flow rate of the polluted liquid, so that the continuity and the accuracy of the test cannot be guaranteed, and the validity of the test result is difficult to evaluate.
When the test of tracking resistance and electric erosion is carried out, the dropping liquid bracket, the sample mounting bracket, the waste liquid tank and the like in the test box body are fixedly mounted by screws, so that the adjustment is difficult during the test, the polluted liquid can not be accurately dropped on the specified position of the sample, the path of the trace of the polluted liquid on the test surface is influenced, the burning position is changed, the ablation position deviates from the specified area frequently, and the test result is seriously influenced. And the waste liquid tank can not be moved for cleaning, and the equipment can generate local corrosion after being used for a certain number of times, so that the insulation strength is reduced.
The dropping liquid mode is for promoting the syringe formula dropping liquid, and the inevitable meeting causes wearing and tearing ageing to the horn in long-term the use, and the horn after ageing has certain frictional force, hinders advancing of dropping liquid during the liquid pushing, influences the velocity of flow of pollution liquid during the experiment.
When the test adopts a step-by-step electric marking voltage method, the continuity of the test is greatly influenced due to the fact that the resistor is manually replaced for many times. Since during the replacement of the resistor the voltage must be temporarily interrupted for the electrical safety test. Thus, the process of electrically marking the sample is temporarily interrupted, and the contaminated liquid cannot be ablated for a short time, and at this time, the contaminated liquid passing through the surface of the sample is increased, and the sample is pressurized again after replacement, and it is difficult to return to the state before power failure. Similarly, when the flow rate of the polluted liquid changes along with the rise of the voltage, the manual adjustment needs to be carried out for many times, and the flow rate of the polluted liquid can not be accurately controlled within a certain time due to the resetting of parameters in the adjustment process.
Therefore, under the comprehensive influence of the factors, the leakage tracking resistance and the electrical erosion loss test cannot be accurately and continuously effectively tested according to the standard when the test is carried out according to the step-by-step electrical tracking voltage method, and the test result cannot be effectively evaluated; the installation is difficult, the operation is inconvenient in the experiment before experimental, influences test efficiency.
Disclosure of Invention
Aiming at the defects of the existing equipment, the invention provides the leakage tracking resistance and electrical erosion resistance test equipment and the test method.
The invention is realized by the following technical scheme:
a kind of test equipment of tracking and electric erosion resistance, including control area, electric area and test area;
the control area comprises a voltage transmitter, a current transmitter, a PLC control element and a PC; the PC is electrically connected with the PLC control element for inputting instructions, and the PLC control element is electrically connected with the voltage transmitter;
the electric area comprises a resistor, a stepping motor and an alternating current/direct current transformer; the voltage transmitter drives the stepping motor to regulate voltage, and then test voltage is output through the AC/DC transformer; the AC/DC transformer, the resistor and the test sample are electrically connected to form a test loop; the resistor is provided with a resistance replacement control unit, and the PLC control element is electrically connected with the resistance replacement control unit;
the test area is provided with a test device, and the test device comprises a water tank, a peristaltic pump, a liquid dropping bracket and a sample bracket; the sample is arranged on a sample bracket, and the dropping liquid bracket is provided with a dropping liquid port; the peristaltic pump has a flow rate control unit; the PLC control element is electrically connected with the flow rate control unit; the PLC controls the peristaltic pump to pump the polluted liquid in the water tank, and the polluted liquid is dripped onto the sample from the dripping opening through the dripping hose.
As a further improvement of the invention, the control area, the electric area and the test area are all arranged in the same test box body, and the control area and the electric area are arranged at two ends of the test area.
As a further improvement of the invention, the water tank and the peristaltic pump are arranged above the sample support, and the waste liquid tank is arranged below the sample support; the dropping liquid support is arranged close to the sample support.
As a further improvement of the invention, magnetic discs are arranged at two ends of the dropping liquid bracket and are used for being fixed on the side wall;
the dropping liquid port is provided with a U-shaped notch, and the U-shaped notch is used for clamping the end part of the dropping liquid hose;
the sample support is of a Chinese character hui-shaped structure, and a sample is fixed through a bolt; magnetic discs are arranged at two ends of the sample support and are used for being fixed on the side wall.
As a further improvement of the invention, a voltage output plate is arranged below the sample support, and one end of the voltage output plate is connected with the sample in parallel.
As a further improvement of the invention, the test area adopts a large space structure for testing, and a fan and a lighting system are also arranged in the test area.
As a further development of the invention, the electrical area further comprises a current transducer, which is connected in series in the test loop; the current transmitter is also connected with the PLC control element.
The test method of the tracking resistance and the electrical erosion resistance test equipment comprises the following steps:
the PC sends a control instruction to the PLC control element; the PLC control element transmits a digital signal to the voltage transmitter to drive the stepping motor to regulate the voltage, and then the test voltage is output to the sample through the transformer;
and voltage signals on the sample are transmitted to the resistor replacing control unit and the flow rate control unit, and the resistor replacing control unit and the flow rate control unit select different resistance values and flow rates of the polluted liquid according to the voltage signals to perform tests.
As a further improvement of the present invention, the resistance replacement control unit and the flow rate control unit continuously detect whether the input voltage signal changes:
if the signal is unchanged, the resistance and the flow rate are not changed;
if the signal changes, judging whether the changed voltage signal is matched with the current resistance and the current flow rate; and continuously operating in a matching state, feeding back a signal to the resistor replacement control unit and the flow rate control unit in a non-matching state, and adjusting to the matched resistor and the flow rate to continuously test.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the electric leakage tracking resistance and electric corrosion resistance test equipment, internal devices are reasonably arranged according to functions, and functional devices such as voltage boosting and reducing operation, dropping liquid speed adjustment, alternating current/direct current conversion control, electrical parameter measurement, safety alarm, waste liquid recovery and the like are integrated in the same box body, and visual touch type operation is adopted, so that the equipment is small in overall design occupied area, reasonable in function distribution and more convenient and practical to operate. The test article mounting bracket designed by the invention ensures the accuracy of the dropping liquid position in the test process from the aspects of bracket fixing mode, bracket style, bracket material and the like.
Furthermore, the series resistance value and the dropping speed can be automatically changed in the test through the PLC control system, the whole test process is monitored, the result is judged, and the test efficiency is greatly improved. The dropping device can control the flow rate of the polluted liquid more accurately, so that the accuracy of the test result is ensured. This equipment can change resistance and velocity of flow automatically along with voltage variation for when carrying out the electrography voltage method test step by step, the process of the test has the continuity, satisfies the test procedure of standard requirement, and the test result more possesses the validity.
Furthermore, one set of equipment can carry out AC/DC test, and internal functional components are all installed in the same box, have visual operation interface, can key automatic operation after setting for the parameter to automatic judgement when the test fails reduces personnel's operation process.
Furthermore, the test article mounting bracket is adjustable, corrosion-resistant, convenient to mount the test article, can guarantee the position of dropping liquid, and avoids the test result difference caused by the position deviation of the dropping liquid.
Furthermore, when a step-by-step electrography voltage method is adopted for testing, the flow velocity is automatically changed, the resistance conversion and the regulation of the flow velocity of the polluted liquid can be automatically carried out along with the voltage change, the manual operation is reduced, and the testing accuracy and continuity are improved.
Furthermore, the liquid dropping mode is changed, the inevitable error in the liquid dropping process is reduced, and the accuracy of the test result is improved.
Drawings
The following detailed description is made with reference to the accompanying drawings and embodiments, in which:
FIG. 1 is a diagram of the overall design of a tracking and erosion resistance test apparatus;
FIG. 2 is a plan view of the operating region of a tracking and erosion resistance test apparatus;
in the above drawings: 1. an alarm lamp; 2. PC (visual touch screen); 3. a keyboard and a mouse; 4. a voltage transmitter; 5. an operating area; 6. a resistance converter; 7. a resistor; 8. an AC/DC transformer; 9. a peristaltic pump; 10. a support; 11. a waste liquid tank; 12. a water tank; 13. a fan; 14. a drip port; 15. a drip stand; 16. a sample holder; 17. and a voltage output plate.
Fig. 3 is a schematic circuit diagram of the present invention.
FIG. 4 is a logic control diagram for automatically replacing resistors and flow rate of contaminated fluid.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in figures 1 and 2, the invention redesigns the anti-tracking and electric erosion test equipment, mainly starts from 4 aspects of materials, structures, dropping liquid, automatic resistance replacement and flow rate, improves the existing problems, and provides a test device which is efficient, high in precision and capable of meeting the standard regulation.
The invention relates to a device for testing tracking resistance and electric erosion resistance, which comprises a control area, an electric area and a test area; the control area, the electric area and the test area are all arranged in the same test box body, and the control area and the electric area are arranged at two ends of the test area.
The control area comprises a voltage transmitter 4, a current transmitter, a PLC control element and a PC 2; the PC 2 is electrically connected with the PLC control element for inputting instructions, and the PLC control element is electrically connected with the voltage transmitter 4;
the electrical area comprises a resistor 7, a stepping motor and an AC/DC transformer 8; the voltage transducer 4 drives the stepping motor to regulate voltage, and then test voltage is output through the AC/DC transformer 8; the AC/DC transformer 8, the resistor 7 and the sample are electrically connected to form a test loop; the resistor 7 is provided with a resistance replacement control unit, and the PLC control element is electrically connected with the resistance replacement control unit;
the test area is provided with a test device, and the test device comprises a water tank 12, a peristaltic pump 9, a dropping liquid bracket 15 and a sample bracket 16; the sample is arranged on a sample support 16, and a dropping liquid support 15 is provided with a dropping liquid port 14; the peristaltic pump 9 has a flow rate control unit; the PLC control element is electrically connected with the flow rate control unit; the PLC controls the peristaltic pump 9 to pump the polluted liquid in the water tank 12, and the polluted liquid is dripped onto the sample from the dripping port 14 through the dripping hose.
Optionally, the water tank 12 and the peristaltic pump 9 are arranged above the sample holder 16, and the waste liquid tank 11 is arranged below the sample holder 16; the drip stand 15 is disposed adjacent to the sample stand 16. Magnetic discs are arranged at two ends of the dropping liquid bracket 15 and are fixed on the side wall; the dropping liquid port 14 is provided with a U-shaped notch which is used for clamping the end part of the dropping liquid hose; the sample support 16 adopts a structure in a shape like a Chinese character hui, and a sample is fixed through a bolt; magnetic discs are mounted on both ends of the sample holder 16 for securing to the side walls.
And a voltage output plate 17 is arranged below the sample support 16, and one end of the voltage output plate 17 is connected with the sample in parallel. The test area adopts a large space structure for testing, and a fan 13 and an illumination system are further arranged in the test area.
The electrical zone further comprises a current transducer connected in series in the test loop; the current transmitter is also connected with the PLC control element. The test loop can be effectively protected.
The principle of the invention is as follows: the high-efficiency AC/DC integrated tracking and electric erosion resistance test equipment with the advantages that the test article is convenient to install, parameters are automatically and accurately adjusted, and operation is visual is provided, and the problem that liquid drops can not accurately drop at a specified position of a test sample due to the fact that the test article is installed in a traditional structure and cannot be adjusted is solved by the test article installation structure designed by the equipment; the PLC control system realizes the function of automatically and accurately adjusting the flow velocity of the series resistor and the polluted liquid along with the voltage, solves the problem that the resistance value and the flow velocity of the resistor need to be frequently changed manually when the test is carried out according to a step-by-step electroscription voltage method, avoids the manual operation error and the test interruption process, saves the time, improves the efficiency, and ensures the accuracy of parameter control and the accuracy of the result in the test process. The design of the arrangement of the internal components and the external appearance of the equipment not only ensures the convenience and the attractiveness of the equipment, but also greatly solves the problems of large occupied space and unreasonable arrangement of other similar equipment.
As a preferred embodiment, the test box is integrally made of high-performance stainless steel materials, so that the test box has good corrosion resistance, and meanwhile, insulating paint is sprayed on the surface of the test box, so that the safety of operators is guaranteed.
Drip hose material: the PVC polyvinyl chloride pipe has good aging resistance, acid and alkali resistance and corrosion resistance, and also has excellent transparency and flexibility of wear resistance. Meeting the requirement of test performance.
As a preferred embodiment, the test chamber is divided into 3 parts: a voltage transmitter 4, a current transmitter, a PLC control element and a PC 2 are arranged in a control area on the right side of the test box; the left side is an electric area, and a resistor 7, a stepping motor and an AC/DC transformer 8 with different resistance values are arranged; the middle is a test area, which is composed of a test device, a fan 13 and a lighting system, and an operator performs a test in the area.
In the control area, a voltage transducer is used for realizing the conversion between the digit and the analog of a voltage signal, and the measuring range is selected from 0V to 100V and 0mA to 20 mA; the current transducer is used for realizing the conversion between the digit and the analog of a current signal, and the range is selected from 0mA to 200mA and 4mA to 20 mA; the PC is used for setting parameters by operators, sending instructions to the equipment and adopting a visual touch screen. After setting parameters, automatically controlling the test and judging the result, if the test fails when the set current exceeds 60mA, and if the surface current of the sample exceeds 60mA, feeding back by a current transmitter, automatically cutting off the test voltage, and displaying the test result on a control panel; the PLC is a control center.
In the electrical area, the upper end is a resistance area, resistors with different resistance values are installed, a converter is installed, and the resistors with different resistance values can be used according to tests; the stepping motor mainly has the function of pressure regulation, and is subdivided into 25000; the lower end is an AC/DC transformer 8, and the test voltage can be switched between AC and DC 2 types by additionally arranging a change-over switch so as to meet the requirements of different tests.
The test area is the main area of personnel's operation, adopts big spatial structure in the design, improves equipment operability when guaranteeing electric safety distance, is equipped with equipment facilitate the use such as fan, illumination.
In a preferred embodiment, the drip design is composed of a water tank 12, a peristaltic pump 9, a drip holder 15, a drip port 14, a sample holder 16, and a waste liquid tank 11. During the test, the sample is arranged on a test bracket 16 by adopting a standard specified method, a PLC (programmable logic controller) controls a peristaltic pump 9 to pump the polluted liquid in a water tank 12, the polluted liquid is respectively dripped onto the sample from a dripping port through a 5-path dripping hose, and the polluted liquid after the test is collected by a waste liquid tank 11.
Design of peristaltic pump: the card type peristaltic pump is adopted, and the small-flow and multi-channel transmission of the polluted liquid can be carried out. During the test, the dropping liquid hose is clamped in the groove of the clamping piece, and the pressure pipe gap is changed by using the pull rod to perform infusion. The peristaltic pump can be controlled by input voltage, the measuring range is 0V-5V, and the corresponding flow is 0 mL/min-2.2 mL/min.
Design of drip stand 15: magnetic discs are arranged at two ends of the support and are adsorbed on the cross beams at two sides. Can realize the free movement around, conveniently adjust the dropping liquid position.
Design of drip opening 14: the U-shaped structure is adopted, the notch has proper width, the dropping liquid hose can be clamped, and the dropping liquid is convenient.
Design of the sample holder: the structure of the shape of Chinese character hui is adopted, an opening with enough length is reserved at each mounting sample, and the bracket ablation caused by the deviation of the liquid dropping position can be effectively prevented; the sample on the bracket is mounted by adopting button screws, so that the defect that the traditional thread screw is seriously corroded in long-term use is avoided; the magnetic discs are arranged at the two ends of the sample support and can be adsorbed on the supports at the two sides, the adjustment can be freely carried out according to the positions of the dropping liquid before the test, and the problem that the dropping liquid port of the inherent support is repeatedly adjusted when the dropping liquid can not drop to the sample is solved.
The logic control and test method for automatically replacing the resistor and the flow rate of the polluted liquid is shown in figure 4 and comprises the following steps:
during testing, an operator sets test parameters in a PC control panel, transmits a digital signal to a voltage transmitter, and the voltage transmitter converts the digital signal and an analog signal. The stepping motor is driven to regulate the voltage, and the test voltage is output through the transformer. Meanwhile, the voltage signal is transmitted to the resistor replacement control unit and the flow rate control unit, and the two units select different resistance values and flow rates of the polluted liquid to test according to the signal.
Furthermore, in the test process, the resistance replacement control unit and the flow rate control unit continuously detect whether the input voltage signal changes, and if the signal does not change, the resistance and the flow rate do not change; if the signal changes, whether the changed voltage is matched with the current resistance and the current flow rate is checked, the current resistance and the current flow rate continue to operate in a matching state, and a signal is fed back to the resistance replacement control unit and the current flow rate control unit in a non-matching state, so that the current resistance and the current flow rate are adjusted to be matched, and the test continues. Therefore, the function of automatically controlling the resistance value of the series resistor and the flow rate of the polluted liquid can be realized, the test continuity is ensured, and the control precision is greatly improved.
According to the anti-tracking and anti-electric erosion test equipment designed by the invention, internal devices are reasonably arranged according to functions, and functional devices such as voltage boosting and reducing operation, dropping liquid speed regulation, alternating current/direct current conversion control, electrical parameter measurement, safety alarm, waste liquid recovery and the like are integrated in the same box body, and visual touch type operation is adopted, so that the equipment is small in overall design floor area, reasonable in function distribution and more in line with convenience and practicability of operation.
The test article mounting bracket designed by the invention ensures the accuracy of the dropping liquid position in the test process from the aspects of bracket fixing mode, bracket style, bracket material and the like.
According to the invention, through the PLC control system, the series resistance value and the liquid dropping speed can be automatically changed in the test, the whole test process is monitored, and the result is judged, so that the test efficiency is greatly improved. The dropping device can control the flow rate of the polluted liquid more accurately, so that the accuracy of the test result is ensured. This equipment can change resistance and velocity of flow automatically along with voltage variation for when carrying out the electrography voltage method test step by step, the process of the test has the continuity, satisfies the test procedure of standard requirement, and the test result more possesses the validity.
All articles and references disclosed above, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.
A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided would be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego such subject matter, nor should the applicant consider that such subject matter is not considered part of the disclosed subject matter.
Claims (9)
1. A kind of test equipment of tracking and electric erosion resistance, characterized by that, including control area, electric area and test area;
the control area comprises a voltage transmitter (4), a current transmitter, a PLC control element and a PC (2); the PC (2) is electrically connected with the PLC control element for inputting instructions, and the PLC control element is electrically connected with the voltage transmitter (4);
the electric area comprises a resistor (7), a stepping motor and an AC/DC transformer (8); the voltage transmitter (4) drives the stepping motor to regulate voltage, and then test voltage is output through the AC/DC transformer (8); the AC/DC transformer (8), the resistor (7) and the test sample are electrically connected to form a test loop; the resistor (7) is provided with a resistor replacement control unit, and the PLC control element is electrically connected with the resistor replacement control unit;
the test area is provided with a test device, and the test device comprises a water tank (12), a peristaltic pump (9), a dropping support (15) and a sample support (16); the sample is arranged on a sample support (16), and the dropping liquid support (15) is provided with a dropping liquid port (14); the peristaltic pump (9) is provided with a flow rate control unit; the PLC control element is electrically connected with the flow rate control unit; the PLC controls the peristaltic pump (9) to pump the polluted liquid in the water tank (12) and the polluted liquid is dripped onto the sample from the dripping opening (14) through the dripping hose.
2. The tracking and erosion resistance test apparatus of claim 1, wherein the control zone, the electrical zone and the test zone are all disposed in the same test chamber, and the control zone and the electrical zone are disposed at both ends of the test zone.
3. Tracking and erosion resistance test equipment according to claim 1, characterized in that the water tank (12) and the peristaltic pump (9) are arranged above the sample holder (16), and a waste liquid tank (11) is arranged below the sample holder (16); the drip holder (15) is arranged close to the sample holder (16).
4. Tracking and erosion resistance test equipment according to claim 1, characterized in that the drip stand (15) is equipped with magnetic discs at both ends for fixing on the side walls;
the dropping liquid port (14) is provided with a U-shaped notch, and the U-shaped notch is used for clamping the end part of the dropping liquid hose;
the sample support (16) adopts a structure in a shape like a Chinese character 'hui', and a sample is fixed through a bolt; magnetic discs are arranged at two ends of the sample support (16) and are fixed on the side wall.
5. Tracking and erosion resistance test equipment according to claim 1, characterized in that a voltage output plate (17) is arranged below the sample holder (16), one end of the voltage output plate (17) being arranged in parallel with the sample.
6. The tracking and electrical erosion resistance test equipment according to claim 1, characterized in that the test area adopts a large space structure for test, and a fan (13) and a lighting system are further arranged in the test area.
7. The tracking and erosion test apparatus of claim 1, wherein said electrical zone further comprises a current transducer connected in series in said test loop; the current transmitter is also connected with the PLC control element.
8. The method for testing tracking and erosion resistance test apparatus of any one of claims 1 to 7, comprising the steps of:
the PC (2) sends a control instruction to the PLC control element; the PLC control element transmits a digital signal to the voltage transmitter to drive the stepping motor to regulate the voltage, and then the test voltage is output to the sample through the transformer;
and voltage signals on the sample are transmitted to the resistor replacing control unit and the flow rate control unit, and the resistor replacing control unit and the flow rate control unit select different resistance values and flow rates of the polluted liquid according to the voltage signals to perform tests.
9. The testing method of tracking and erosion resistance testing apparatus according to claim 8, wherein the resistance replacement control unit and the flow rate control unit constantly detect whether the input voltage signal is changed:
if the signal is unchanged, the resistance and the flow rate are not changed;
if the signal changes, judging whether the changed voltage signal is matched with the current resistance and the current flow rate; and continuously operating in a matching state, feeding back a signal to the resistor replacement control unit and the flow rate control unit in a non-matching state, and adjusting to the matched resistor and the flow rate to continuously test.
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| CN202010832534.6A CN111965506A (en) | 2020-08-18 | 2020-08-18 | Tracking and electric erosion resistance test equipment and test method |
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Effective date of registration: 20210810 Address after: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Applicant after: XI'AN HIGH VOLTAGE APPARATUS RESEARCH INSTITUTE Co.,Ltd. Address before: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Applicant before: XI'AN HIGH VOLTAGE APPARATUS RESEARCH INSTITUTE Co.,Ltd. Applicant before: CHINA XD ELECTRIC Co.,Ltd. |
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Address after: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Applicant after: Xi'an High Voltage Electrical Apparatus Research Institute Co.,Ltd. Address before: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Applicant before: XI'AN HIGH VOLTAGE APPARATUS RESEARCH INSTITUTE Co.,Ltd. |