CN211528053U - Bending resistance test system for single-column leg of three-column insulator of GIL equipment - Google Patents

Abstract

The utility model discloses a three-pillar insulator single-leg bending performance testing system for GIL equipment, which comprises a three-pillar insulator tooling, a thrust test mechanism, a terminal mechanism and a protection circuit which are connected in sequence; the three-pillar insulator tooling is used for fixing The tested three-pillar insulator; the thrust testing mechanism includes a motor, a thrust sensor, a displacement sensor and a strain gauge; the terminal mechanism includes a terminal and an oscilloscope; the terminal mechanism includes a terminal and an oscilloscope. The framework of the GIL equipment three-pillar insulator single-leg bending performance testing system provided by the embodiment of the present utility model is reasonable, simple, clear and intuitive, and can accurately measure the bending performance of the three-pillar insulator in the actual GIL application. It is convenient and greatly facilitates the technical personnel to collect and obtain performance information.

Description

A GIL equipment three-column insulator single-column leg bending performance test system

technical field

The utility model relates to the technical field of high-voltage electrical testing, in particular to a testing system for the bending resistance of a three-pillar insulator and a single-pillar leg of a GIL equipment.

Background technique

Gas-insulated Metal-enclosed Transmission Line (GIL), as a transmission bus, is a kind of power transmission equipment with broad development prospects, and is widely used in large nuclear power plants and hydropower plants. The structure of GIL is a metal pipe, the pipe is filled with a certain pressure of sulfur hexafluoride (SF6) gas as an insulating medium, and a conductor set in the center is used to transmit electricity. In practical applications, the three-pillar insulator is used as the main insulator to support and insulate the conductor in the center. It can be seen that the three-pillar insulator plays a very important role in the field of GIL.

Under different and complex working conditions, the three-pillar insulator will be affected by different factors such as thermal expansion and contraction of the conductor/shell, ground settlement, assembly error, etc., which will change its structure and electrical performance, so as to cause damage to the transmission equipment. . Among them, the column legs of the three-column insulator are susceptible to large bending moment loads, and the three-column insulators with insufficient bending performance of the single-column leg will form internal air gap defects under complex stress conditions such as transportation, installation, and operation. With the long-term operation and development of equipment, insulation failure and insulator burst accidents will eventually occur, resulting in a certain degree of loss of personnel and property.

At present, the detection of three-pillar insulators only focuses on the mechanical properties of the three-pillar insulator as a whole, such as the gravity of the conductor and the mechanical load performance caused by the axial displacement. The problem is not covered, and because the force of the three-pillar insulator under the actual working conditions is very complex, it is difficult to simulate the force of the three-pillar insulator; and the test system that is far from the actual situation cannot truly and effectively reflect the three-pillar insulator. The force information and stress information of the insulator, which leads to the inability to obtain accurate information on the bending performance of the leg inserts of the three-pillar insulator.

Utility model content

In view of the above problems, the purpose of the present invention is to provide a GIL equipment three-pillar insulator single-leg bending performance test system that can accurately reflect the bending performance information of the three-pillar insulator in the actual working condition.

In order to achieve the above purpose, the utility model improves a GIL equipment three-pillar insulator single-leg bending performance testing system, which includes three-pillar insulator tooling, thrust testing mechanism, terminal mechanism and protection circuit connected in sequence.

Wherein, the three-pillar insulator tooling is used to fix the measured three-pillar insulator.

The thrust testing mechanism includes a motor, a thrust sensor, a displacement sensor and a strain gauge; the terminal mechanism includes a terminal and an oscilloscope.

The motor is used to provide thrust load and maintain the thrust load; the thrust sensor is used to detect the value of the thrust load and send the value to the terminal; the displacement sensor is used to detect The displacement amount of the force application point of the motor, and the displacement amount is sent to the terminal machine; the strain gauge, which is arranged on the surface of the under-tested column leg insert of the three-column insulator under test, is used to detect The strain information of the to-be-tested leg insert of the three-column insulator to be tested is sent to the oscilloscope for display.

The terminal mechanism is used to calculate at least one of the following parameters according to the received data detected by the thrust testing mechanism: tensile strength and yield strength of the leg inserts to be tested of the three-pillar insulator to be tested. and moment load information.

As an improvement of the above solution, the three-pillar insulator tooling, thrust test mechanism and terminal mechanism connected in sequence include:

The direction of the leg inserts to be tested of the three-column insulator under test is perpendicular to the direction of the thrust load provided by the motor.

As an improvement of the above solution, the three-column insulator tooling includes column leg fixing bolts.

As an improvement of the above solution, the column leg fixing bolts are arranged at the ends of the column leg inserts to be tested of the tested three-column insulators, and are fixedly connected with the to-be-tested column leg inserts of the tested three-column insulators .

As an improvement of the above solution, the strain gauge is applied to the high stress area on the surface of the tested column leg insert of the tested three-column insulator.

As an improvement of the above solution, the oscilloscope is connected to the terminal for sending the strain information to the terminal.

As an improvement of the above solution, the strain gauge is a high-precision strain gauge with 0.5 micro-strain.

The GIL equipment three-pillar insulator single-pillar leg bending performance test system provided by the utility model ensures the accuracy of the test by adopting the three-pillar insulator tooling for fixing; the protection circuit is used to protect the entire test system; The thrust load is applied to the leg of the insulator to be tested. By adjusting the thrust load application form, such as linear rise until failure, thrust linearly rises until the tolerance value and stops, or thrust linearly rises to the tolerance value to maintain the load, it accurately simulates the actual working conditions. The force condition of the equipment; use multiple test equipment with specific functions to test the leg inserts of the three-pillar insulator to be tested to obtain the thrust information, displacement information and stress information under different stress conditions. Then, according to the calculation of the terminal, the information of the tensile strength, yield strength and bending moment load of the under-tested column leg inserts of the three-column insulator to be tested can be obtained, so as to complete the bending resistance of the single-column leg of the three-column insulator. Performance detection; at the same time, the terminal equipment is used to count the data collected by multiple test equipment, which is convenient for technicians to intuitively and comprehensively understand the bending resistance information of the three-pillar insulator. All components of the whole test system are effectively coordinated, and the frame is reasonable and simple, clear and intuitive, and can accurately measure the bending resistance of the column leg inserts of the three-pillar insulator in the actual GIL application. Collection and acquisition of information.

Description of drawings

In order to illustrate the technical solutions of the present invention more clearly, the following briefly introduces the accompanying drawings used in the implementation manner. Obviously, the accompanying drawings in the following description are only some implementations of the present utility model. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

Fig. 1 is the structural representation of a kind of GIL equipment three-column insulator single-column leg bending performance test system provided by the embodiment of the present invention;

Fig. 2 is a top-view structural schematic diagram of a three-pillar insulator for GIL equipment provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of the force-bearing structure of a single-column leg of a three-column insulator of a GIL equipment provided by an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In the description of embodiments of the present invention, it is noted that practice may be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. Furthermore, the present invention may be used in environments or configurations that include numerous general purpose or special purpose computing devices. For example: personal computers, server computers, handheld or portable devices, tablet-type devices, multi-processor devices, distributed computing environments including any of the above, and the like.

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the related drawings. It should be noted that when an element is referred to as being "connected" to another element, it can be directly connected to and integrated with the other element, or intervening elements may also be present. The terms "provided at," "end," and similar expressions as used herein are for illustrative purposes only. Unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention.

An embodiment of the present utility model provides a GIL equipment three-pillar insulator single-leg bending performance testing system, which includes a three-pillar insulator tooling, a thrust testing mechanism, a terminal mechanism and a protection circuit connected in sequence. Specifically, please refer to FIG. 1 , which is a schematic structural diagram of a GIL equipment three-pillar insulator single-leg bending performance test system provided by an embodiment of the present invention, wherein the three-pillar insulator tooling is used to fix the tested three-pillars insulator. The thrust testing mechanism includes a motor, a thrust sensor, a displacement sensor and a strain gauge. The terminal mechanism includes a terminal and an oscilloscope. The protection circuit (not shown) is used for circuit protection of the entire test system.

Specifically, please refer to FIG. 2 , which is a schematic top-view structural diagram of a three-pillar insulator of a GIL equipment provided by an embodiment of the present invention. As shown in the figure, the three-pillar insulator includes an insulator center insert 2 and an outer insert. The center insert 2 is located in the center of the three-pillar insulator, metal material. The outer insert includes three legs 1, 3 and 6, each of which is 120° out of phase in the plane, and is embedded in the center insert 2, while providing an optimized electric field at the legs for the entire three-column insulator.

The three-pillar insulator tooling is an auxiliary tool used in the factory test and inspection of the three-pillar insulator. In this embodiment, the three-column insulator tooling is mainly used to fix the three-column insulator to be tested, so that the entire testing system can effectively simulate the stress of the three-column insulator during testing.

It should be noted that, in this embodiment, the motor is used to provide and maintain the thrust load; in the actual test, the column leg of the to-be-tested column leg insert of the three-strut insulator to be tested is The direction should be kept perpendicular to the direction of the thrust applied by the motor. Please refer to FIG. 3 , which is a schematic diagram of the force-bearing structure of a single column leg of a three-pillar insulator of a GIL equipment provided by an embodiment of the present invention, wherein the direction of the column leg 3 Keep perpendicular to the direction of thrust F. However, the other two column legs 1 and 6 (not shown in FIG. 3 ) of the tested three-column insulator are not fixed. A thrust load is applied to the under-tested leg inserts of the tested three-pillar insulator by the motor, and the thrust load can be applied in the form of a linear increase of the thrust until failure, a linear increase of the thrust to a tolerance value and a stop, or a linear increase of the thrust The load can be maintained until the tolerance value, and other damage tests or tolerance tests can also be carried out as required.

The thrust sensor is used to detect the value of the thrust load and send the value to the terminal; the displacement sensor is used to detect the displacement of the point where the motor is applied, and send the displacement to the terminal. The terminal; the strain gauge 4, as shown in FIG. 3, is arranged on the surface of the under-tested column leg insert 3 of the under-tested three-column insulator, and is used to detect the under-tested three-column insulator to be tested. Strain information for leg inserts is tested and sent to the oscilloscope for display.

The terminal mechanism is used to calculate at least one of the following parameters according to the received data detected by the thrust testing mechanism: tensile strength and yield strength of the leg inserts to be tested of the three-pillar insulator to be tested. and moment load information. By receiving the data detected by the thrust testing mechanism, the parameters reflecting the strength performance including bending load, compressive load or torsional load are calculated, so as to obtain the tensile strength, yield strength and bending moment load information of the column leg insert to be tested , and then obtain the relevant information on the bending performance of the single-column leg of the three-column insulator. Specifically, the terminal can be any terminal device in the prior art, such as a notebook computer, a mobile phone, a tablet computer, etc., and according to needs, can be equipped with multiple terminals, and the terminals are provided with professional strength information processing software to Get the best test results.

The GIL equipment three-column insulator single-column leg bending performance test system provided by the embodiment of the present utility model ensures the accuracy of the test by using the three-column insulator tooling for fixing; the protection circuit is used to protect the entire test system; The three-pillar insulator to be tested is subjected to a thrust load by adjusting the thrust load application form, such as linear rise until failure, thrust linearly rises until the tolerance value and stops, or thrust linearly rises to the tolerance value to maintain the load, which accurately simulates the actual work. The stress of the equipment under different stress conditions; use multiple test equipment with specific functions to test the leg inserts of the three-pillar insulator to be tested to obtain the thrust information, displacement information and stress under different stress conditions. Then, according to the calculation of the terminal computer, the information of the tensile strength, yield strength and bending moment load of the leg inserts to be tested of the three-column insulator to be tested can be obtained, so as to complete the calculation of the single-column leg of the three-column insulator. Bending performance detection; at the same time, the terminal equipment is used to count the data collected by multiple test equipment, which is convenient for technicians to intuitively and comprehensively understand the bending performance information of three-pillar insulators. All components of the whole test system are effectively coordinated, and the frame is reasonable and simple, clear and intuitive, and can accurately measure the bending resistance of the column leg inserts of the three-pillar insulator in the actual GIL application. Collection and acquisition of information.

Preferably, in the above embodiment, the three-pillar insulator tooling, the thrust test mechanism and the terminal mechanism connected in sequence include:

The direction of the leg inserts to be tested of the three-column insulator under test is perpendicular to the direction of the thrust load provided by the motor.

Preferably, in the above embodiment, referring to FIG. 3 , the three-column insulator tooling includes column leg fixing bolts 5 .

Preferably, in the above embodiment, the column leg fixing bolt 5 is provided at the end of the column leg insert 3 of the tested three-column insulator to be tested, to ensure that the position of the three-column insulator is relatively fixed and will not be If shaking occurs, the other two legs 1 and 6 (not shown in Figure 3) of the three-column insulator under test can be fixed according to actual needs, or not fixed. After testing the bending resistance of the single-column leg, The same flexural performance test can be performed on the other two subsequent legs.

Preferably, in the above embodiment, the strain gauge 4 is attached to the high stress area on the surface of the leg insert 3 to be tested of the three-column insulator to be tested. When the strain gauge is deformed, a variety of sensors are used to measure or record the deformation signal. In the embodiment of the present invention, an oscilloscope is used to detect the signal, so as to obtain the precise waveform of the signal.

Preferably, in the above embodiment, the oscilloscope is connected to the terminal for sending the strain information to the terminal, and the terminal can be equipped with a corresponding database function to monitor the detection of the entire test system. The obtained data is analyzed, and the data information of three-pillar insulators with different signal specifications is recorded at the same time to facilitate the horizontal and vertical comparison of technicians. The waveform information of the oscilloscope is also sent to the terminal for analysis and storage, realizing comprehensive data management.

Preferably, in the above embodiment, the number of the strain gauges 5 can be set to a specific number according to actual test requirements, and the model specification is preferably 0.5 micro-strain high-precision strain gauges. Strain is the ratio of the amount of deformation to the original size; microstrain is also used to indicate the degree of change in deformation, but it is only used to describe extremely small deformations. Generally speaking, microstrain is one millionth of the strain, and 0.5 A micro-strain high-precision strain gauge can more accurately detect the stress information of the leg inserts of the three-pillar insulator, which greatly improves the measurement accuracy.

The GIL equipment three-column insulator single-column leg bending performance test system provided by the embodiment of the present utility model ensures the accuracy of the test by using the three-column insulator tooling for fixing; the protection circuit is used to protect the entire test system; The three-pillar insulator to be tested is subjected to a thrust load by adjusting the thrust load application form, such as linear rise until failure, thrust linearly rises until the tolerance value and stops, or thrust linearly rises to the tolerance value to maintain the load, which accurately simulates the actual work. The stress of the equipment under different stress conditions; use multiple test equipment with specific functions to test the leg inserts of the three-pillar insulator to be tested to obtain the thrust information, displacement information and stress under different stress conditions. Then, according to the calculation of the terminal computer, the information of the tensile strength, yield strength and bending moment load of the leg inserts to be tested of the three-column insulator to be tested can be obtained, so as to complete the calculation of the single-column leg of the three-column insulator. Bending performance detection; at the same time, the terminal equipment is used to count the data collected by multiple test equipment, which is convenient for technicians to intuitively and comprehensively understand the bending performance information of three-pillar insulators. All components of the whole test system are effectively coordinated, and the frame is reasonable and simple, clear and intuitive, and can accurately measure the bending resistance of the column leg inserts of the three-pillar insulator in the actual GIL application. Collection and acquisition of information.

The above disclosures are only some preferred embodiments of the present invention, and of course, the scope of the rights of the present invention cannot be limited by this. The equivalent changes made by the new claims still fall within the scope covered by the utility model.

Claims (7)

1. a GIL equipment three-pillar insulator single-leg leg bending performance test system, is characterized in that, comprises three-pillar insulator tooling, thrust test mechanism, terminal mechanism and protection circuit connected successively; The three-pillar insulator tooling is used to fix the measured three-pillar insulator; The thrust testing mechanism includes a motor, a thrust sensor, a displacement sensor and a strain gauge; the terminal mechanism includes a terminal and an oscilloscope; The motor is used to provide thrust load and maintain the thrust load; the thrust sensor is used to detect the value of the thrust load and send the value to the terminal; the displacement sensor is used to detect The displacement amount of the force application point of the motor, and the displacement amount is sent to the terminal machine; the strain gauge, which is arranged on the surface of the under-tested column leg insert of the three-column insulator under test, is used to detect The strain information of the leg insert to be tested of the tested three-column insulator is sent to the oscilloscope for display; The terminal mechanism is used to calculate at least one of the following parameters according to the received data detected by the thrust testing mechanism: tensile strength and yield strength of the leg inserts to be tested of the three-pillar insulator to be tested. and moment load information. 2. GIL equipment three-pillar insulator single-pillar leg bending performance testing system according to claim 1, is characterized in that, described successively connected three-pillar insulator tooling, thrust test mechanism and terminal mechanism, specifically comprise: The direction of the leg inserts to be tested of the three-column insulator under test is perpendicular to the direction of the thrust load provided by the motor. 3 . The system for testing the bending performance of a three-pillar insulator and a single-leg leg of a GIL equipment according to claim 1 , wherein the three-pillar insulator tooling comprises a column-leg fixing bolt. 4 . 4. The GIL equipment three-pillar insulator single-leg flexural performance testing system according to claim 3, characterized in that, the column leg fixing bolts are provided on the column leg insert to be tested of the tested three-pillar insulator. end, and is fixedly connected with the under-tested column leg insert of the three-pillar insulator under test. 5. The GIL equipment three-pillar insulator single-leg flexural performance test system according to claim 1, wherein the strain gauge is applied to the surface of the tested three-pillar insulator to be tested on the surface of the leg insert. high stress areas. 6. The GIL equipment three-column insulator single-column leg bending performance testing system according to claim 1, wherein the oscilloscope is connected to the terminal for sending the strain information to the terminal . 7. The GIL equipment three-pillar insulator single-leg bending performance testing system according to claim 1, wherein the strain gauge is a high-precision strain gauge with 0.5 micro-strain.

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