CN106226177B - Extra-high voltage direct current composite wall bushing internal and external anti-seismic testing device and testing method - Google Patents
Extra-high voltage direct current composite wall bushing internal and external anti-seismic testing device and testing method Download PDFInfo
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- CN106226177B CN106226177B CN201610559606.8A CN201610559606A CN106226177B CN 106226177 B CN106226177 B CN 106226177B CN 201610559606 A CN201610559606 A CN 201610559606A CN 106226177 B CN106226177 B CN 106226177B
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- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention discloses an internal and external anti-seismic test device and a test method for an extra-high voltage direct current composite wall bushing. According to the invention, the third accelerometer and the fourth accelerometer are used for respectively measuring the acceleration of the outer sleeve and the inner guide rod, and the movement displacement of the outer sleeve and the inner guide rod can be obtained by performing integral calculation on the measurement results of the third accelerometer and the fourth accelerometer, so that the relative displacement between the outer sleeve and the inner guide rod can be calculated according to the displacement of the outer sleeve, and the problems of collision, breakdown caused by insufficient air gap and the like of the wall bushing in an earthquake can be further judged.
Description
Technical Field
The invention relates to the technical field of wall bushing anti-seismic tests, in particular to an extra-high voltage direct current composite wall bushing internal and external anti-seismic test device and a test method.
Background
With the development of the transmission and transformation project in China towards high voltage, ultrahigh voltage and extra-high voltage, a large amount of key equipment such as extra-high voltage direct current wall bushing is arranged in a direct current converter station. The wall bushing is composed of an outer bushing and an inner guide rod arranged in the outer bushing, wherein the outer bushing comprises an outdoor bushing outside the valve hall and an indoor bushing inside the valve hall, the inner guide rod comprises an outdoor guide rod outside the valve hall and an indoor guide rod inside the valve hall, the middle of the inner guide rod is connected into a whole through a transition tank, and the transition tank is installed on the wall body of the valve hall in a hanging mode through a mounting plate. Under the action of multidimensional earthquake, the wall body of the valve hall has a considerable power amplification effect on the extra-high voltage direct current wall bushing, so that the extra-high voltage direct current wall bushing can actually receive a more severe earthquake effect, and needs to be subjected to strict earthquake examination, so that the safety of the extra-high voltage direct current wall bushing in the earthquake is ensured. At present, no special anti-seismic test device is used for simulating the anti-seismic performance of the wall bushing in the test working condition.
Disclosure of Invention
Based on the above, the invention provides an internal and external anti-seismic test device and a test method for an extra-high voltage direct current composite wall bushing, which can simulate and test the wall bushing under the actual working condition to determine the anti-seismic performance of the wall bushing under the actual working condition.
The technical scheme is as follows:
the utility model provides an interior outer anti-seismic test device of compound wall bushing of extra-high voltage direct current, this wall bushing include the outer tube and locate interior guide arm in the outer tube, including acceleration measuring device, support, locate mounting panel on the support with locate the beneath shaking table of support, the support is equipped with the support the supporting beam of mounting panel, the mounting hole that supplies the wall bushing to pass is seted up to the mounting panel, acceleration measuring device is including locating first accelerometer on the shaking table, locating second accelerometer on the supporting beam, locate the third accelerometer on this outer tube and locate fourth accelerometer on the interior guide arm.
In one embodiment, the wall bushing further comprises a transition tank, the outer sleeve comprises a first sleeve and a second sleeve which are positioned at two ends of the transition tank, the inner guide rod comprises a first guide rod and a second guide rod which are positioned at two ends of the transition tank, at least two third accelerometers and at least two fourth accelerometers are arranged at the gravity center of the first sleeve and the gravity center of the second sleeve, and the fourth accelerometers are arranged at the gravity center of the first guide rod and the gravity center of the second guide rod.
In one embodiment, the third accelerometer is disposed at one end of the first sleeve close to the transition tank, at one end of the first sleeve far away from the transition tank, at one end of the second sleeve close to the transition tank, and at one end of the second sleeve far away from the transition tank.
In one embodiment, the acceleration measuring device further comprises a fifth speedometer provided on the mounting plate.
In one embodiment, the device further comprises a displacement measuring device, wherein the displacement measuring device comprises a first displacement meter arranged on the vibration table, a second displacement meter arranged on the support beam and a third displacement meter arranged on the outer sleeve.
In one embodiment, the third displacement meter is a plurality of displacement meters, and the third displacement meter is arranged at one end of the first sleeve close to the transition tank, one end of the first sleeve far away from the transition tank, the center of gravity of the first sleeve, one end of the second sleeve close to the transition tank, one end of the second sleeve far away from the transition tank and the center of gravity of the second sleeve.
In one embodiment, the strain gauge further comprises a strain measuring device, wherein the strain measuring device comprises a first strain gauge arranged on the outer surface of the outer sleeve and a second strain gauge arranged on the outer surface of the inner guide rod.
In one embodiment, the strain gauges are at least two, the first strain gauge is arranged at one end of the first sleeve close to the transition tank, the second strain gauge is arranged at one end of the second sleeve close to the transition tank, and the second strain gauge is arranged at one end of the first guide rod close to the transition tank and one end of the second guide rod close to the transition tank.
In one embodiment, the vibration table further comprises a controller, and the vibration table and the acceleration measuring device are both electrically connected with the controller.
The technical scheme also provides an internal and external anti-seismic test method for the extra-high voltage direct current composite wall bushing, which comprises the following steps:
installing the wall bushing sample on an installation plate, wherein the installation plate is arranged on a support beam of a support;
arranging a first accelerometer on the table top of the vibration table, arranging a second accelerometer on the support beam, arranging a third accelerometer on the outer sleeve, and arranging a fourth accelerometer on the inner guide rod;
starting a vibrating table;
the method comprises the following steps that a first accelerometer, a second accelerometer, a third accelerometer and a fourth accelerometer respectively acquire acceleration values of a vibrating table, a supporting beam, an outer sleeve and an inner guide rod;
and analyzing and processing the measured acceleration value to determine the anti-seismic performance of the wall bushing.
The advantages or principles of the foregoing technical solution are explained below:
the invention provides an internal and external anti-seismic test device for an extra-high voltage direct current composite wall bushing, which comprises an acceleration measuring device, a mounting plate, a bracket and a vibration table, wherein the tested wall bushing is fixed on the bracket through the mounting plate. The support can be designed to have the same quality and strength as the actual wall body of the valve hall and is used for simulating the actual wall body of the valve hall, the vibration table is arranged below the support and is used for outputting seismic waves, and when the vibration table is started, the support amplifies vibration power and transmits the vibration power to the wall bushing, so that the wall bushing under the actual working condition is integrally simulated, and the anti-seismic performance of the wall bushing under the power amplification effect of the wall body of the valve hall can be tested through the acceleration measuring device. Specifically, the first accelerometer is used for measuring the seismic excitation actually output by the table top of the vibration table; the second accelerometer is used for measuring the acceleration amplification effect of the bracket on the test sample, namely the actual earthquake excitation on the wall bushing test sample, and the wall bushing is arranged on the supporting beam through the mounting plate, so that the earthquake excitation reaching the wall bushing can be directly obtained by measuring the acceleration induction value on the supporting beam; the third accelerometer is used to determine the acceleration response of the wall bushing under test. The anti-seismic performance of the wall bushing under the actual working condition is determined by analyzing and calculating the acceleration values of the vibrating table, the supporting beam and the outer surface of the wall bushing. Meanwhile, the acceleration measuring device also comprises a fourth accelerometer arranged on the inner guide rod, acceleration measurement is respectively carried out on the outer sleeve and the inner guide rod through the third accelerometer and the fourth accelerometer, the measurement results of the third accelerometer and the inner guide rod are subjected to integral calculation to obtain the movement displacement of the outer sleeve and the inner guide rod, so that the relative displacement between the outer sleeve and the inner guide rod is calculated according to the displacement of the outer sleeve and the inner guide rod, and the problems of collision, breakdown caused by insufficient air gap and the like of the wall bushing in the earthquake are further judged. In summary, the invention provides the inner and outer anti-seismic test device and the test method for the ultra-high voltage direct current composite wall bushing, which can simulate and test the wall bushing under the actual working condition so as to determine the anti-seismic performance of the wall bushing under the actual working condition, and have greater practicability and applicability.
Preferably, the third accelerometer and the fourth accelerometer are respectively positioned at the gravity centers of the outer sleeve and the inner guide rod, so that measuring points of the outer sleeve and the inner guide rod are positioned at the same cross section, and further the relative displacement of the outer sleeve and the inner guide rod in the same radial direction can be determined, and the problems of collision, breakdown caused by insufficient air gap and the like of the wall bushing in an earthquake can be more accurately judged.
The third accelerometer is still located the one end that the transition jar was kept away from to first sleeve pipe, the one end that the transition jar was kept away from to the second sleeve pipe and the one end that the transition jar was kept away from to the second sleeve pipe respectively. Because the positions of the wall bushing are weak links under earthquake disasters, the measuring points are arranged at the positions on the basis of fully considering the test cost, and the effect of integrally evaluating the earthquake resistance of the bushing can be achieved.
The acceleration measuring device is characterized by further comprising a fourth accelerometer arranged on the mounting plate, and the fourth accelerometer is used for measuring the torque outside the mounting plate.
The invention also comprises a displacement measuring device which is used for measuring the displacement of the outer surfaces of the vibrating table, the support beam and the wall bushing. The acceleration measuring device and the displacement measuring device are arranged on the test device, so that the acceleration and the displacement of the wall bushing under seismic excitation can be measured, the test results can be mutually checked by utilizing the relation between the acceleration and the displacement, and the reliability of the measurement results of the sensor is ensured.
The invention also comprises a strain measuring device which comprises a first strain gauge arranged on the outer surface of the outer sleeve and a second strain gauge arranged on the outer surface of the inner guide rod, and the strain measuring device is used for evaluating the strain and deformation conditions of the outer sleeve and the inner guide rod so as to determine the shock resistance of the test sample.
Because the place of being connected with the transition jar on the wall bushing is the weakest link of antidetonation, arranges first strainometer in the one end that first sleeve pipe is close to the transition jar and the one end that the second sleeve pipe is close to the transition jar, arranges the second strainometer in the one end that first guide arm is close to the transition jar and the one end that the second guide arm is close to the transition jar, both can reach the effect of test strain, can save the test cost again.
The end close to the transition tank is close to the end of the transition tank, the controller is used for controlling the vibration table to start and the acceleration measuring device to measure, and meanwhile, the measured data is analyzed and calculated, so that the automatic control and calculation of the whole testing device can be realized.
Drawings
FIG. 1 is a schematic structural view of a wall bushing according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an inside and outside anti-seismic test device for an extra-high voltage direct current composite wall bushing according to an embodiment of the invention;
FIG. 3 is a schematic side view of a bracket and mounting plate according to an embodiment of the present invention;
FIG. 4 is a schematic layout of an acceleration measuring device according to an embodiment of the present invention;
FIG. 5 is a schematic layout of a displacement measuring device according to an embodiment of the present invention;
FIG. 6 is a schematic layout of a strain gauge according to an embodiment of the present invention;
FIG. 7 (a) is a schematic view of an arrangement of individual strain flowers according to an embodiment of the present invention; FIG. 7 (b) is a schematic diagram of an arrangement of 4 strain flowers on an outer sleeve according to an embodiment of the present invention;
FIG. 8 (a) is a schematic diagram of an arrangement of individual strain gages according to an embodiment of the present invention; fig. 8 (b) is a schematic layout view of 4 strain gauges on the inner guide rod according to the embodiment of the present invention.
Description of reference numerals:
100. wall bushing, 110, outer bushing, 111, first bushing, 112, second bushing, 120, inner guide rod, 121, first guide rod, 122, second guide rod, 130, transition tank, 200, vibration table, 210, table top, 300, bracket, 310, support beam, 400, mounting plate, 410, mounting hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, the wall bushing 100 is composed of an outer bushing 110 and an inner guide rod 120, wherein the outer bushing 110 includes a first bushing 111 and a second bushing 112, the inner guide rod 120 includes a first guide rod 121 and a second guide rod 122, and the first bushing 111 and the second bushing 112 and the first guide rod 121 and the second guide rod 122 are integrally connected through a transition tank 130. As shown in fig. 2 and fig. 3, the internal and external anti-seismic testing apparatus for the ultra-high voltage direct current composite wall bushing, according to the present invention, includes an acceleration measuring apparatus, a bracket 300, a mounting plate 400 disposed on the bracket 300, and a vibration table 200 disposed under the bracket 300. The support 300 is provided with a support beam 310 for supporting the mounting plate 400, the mounting plate 400 is provided with a mounting hole 410 for the wall bushing 100 to pass through, the mounting plate 400 is obliquely arranged, and the included angle between the mounting plate 400 and the vertical direction is about 10 degrees, so that a test sample can be obliquely mounted on the support 300 for simulating the wall bushing 100 obliquely arranged under the actual working condition. The support 300 can be designed to have the same quality and strength as the actual valve hall wall and is used for simulating the actual valve hall wall, the vibration table 200 below the support 300 is used for outputting seismic waves, and when the vibration table 200 is started, the support 300 amplifies vibration power and transmits the vibration power to the wall bushing 100, so that the wall bushing 100 under the actual working condition is simulated on the whole, and the seismic performance of the wall bushing 100 under the power amplification effect of the valve hall wall can be tested through an acceleration measuring device.
Specifically, as shown in fig. 4, the acceleration measuring device includes a first accelerometer A1 disposed on the table top 210 of the vibration table 200, a second accelerometer A2 disposed on the support beam 310 (at the connection between the support beam 310 and the mounting plate 400), a third accelerometer A3 disposed on the outer surface of the wall bushing 100, and a fourth accelerometer A4 disposed on the inner guide bar 120. . The first accelerometer A1 is used to measure the seismic excitation actually output by the table 210 of the vibration table 200, the second accelerometer A2 is used to measure the acceleration amplification of the test specimen by the support 300, i.e., the seismic excitation actually experienced by the test specimen of the wall bushing 100, and the third accelerometer A3 is used to measure the acceleration response of the bushing during the test. The vibration resistance of the wall bushing 100 under actual working conditions is determined by analyzing and calculating the acceleration values of the outer surfaces of the vibrating table 200, the support beams 310 and the wall bushing 100. Meanwhile, the acceleration measuring device further comprises a fourth accelerometer A4 arranged on the inner guide rod 120, acceleration measurement is respectively carried out on the outer sleeve 110 and the inner guide rod 120 through the third accelerometer A3 and the fourth accelerometer A4, movement displacement of the outer sleeve 110 and the inner guide rod 120 can be obtained through integral calculation of measurement results of the outer sleeve and the inner guide rod, relative displacement between the outer sleeve and the inner guide rod is calculated according to the displacement of the outer sleeve, and then the problems that whether the wall bushing 100 has collision or not in an earthquake and breakdown is caused by insufficient air gap are judged. In summary, the invention provides the inside and outside anti-seismic test device and the test method for the ultra-high voltage direct current composite wall bushing, which can simulate and test the wall bushing 100 under the actual working condition to determine the anti-seismic performance of the wall bushing 100 under the actual working condition, and have greater practicability and applicability.
In this embodiment, the number of the third accelerometer A3 and the number of the fourth accelerometer A4 are at least two, the third accelerometer A3 is disposed at the center of gravity of the first casing 111 and the center of gravity 112 of the second casing, and the fourth accelerometer A4 is disposed at the center of gravity of the first guide rod 121 and the center of gravity of the second guide rod 122. The third accelerometer A3 and the fourth accelerometer A4 are respectively positioned at the gravity centers of the outer sleeve 110 and the inner guide rod 120, so that the measuring points of the outer sleeve 110 and the inner guide rod 120 are positioned at the same cross section, and the relative displacement of the outer sleeve 110 and the inner guide rod 120 in the same radial direction can be further determined, so that the problems of collision, breakdown caused by insufficient air gap and the like of the wall bushing in an earthquake can be more accurately judged.
Further, a third accelerometer A3 is further disposed at an end of the first sleeve 111 close to the transition tank 130, an end of the first sleeve 111 far away from the transition tank 130, an end of the second sleeve 112 close to the transition tank 130, and an end of the second sleeve 112 far away from the transition tank 130, respectively. Since the positions of the wall bushing 100 are weak links in earthquake disasters, the measuring points are arranged at the positions on the basis of fully considering the test cost, and the effect of integrally evaluating the earthquake resistance of the bushing can be achieved.
In this embodiment, the acceleration measuring device further includes a fifth speedometer A5 disposed on the mounting plate 400, and the fifth speedometer A5 is used for measuring the out-of-plane torsion of the mounting plate 400.
Preferably, the first accelerometer A1, the second accelerometer A2, the third accelerometer A3, the fourth accelerometer A4 and the fifth accelerometer A5 are all three-direction acceleration sensors. The first accelerometer A1, the second accelerometer A2 and the fifth accelerometer A5 are arranged in a global coordinate manner, that is, the three measured directions are the X direction parallel to the ground direction, the Y direction and the Z direction perpendicular to the ground, wherein the X direction is the direction in which the wall bushing 100 points from one end to the other end in the horizontal plane, and the Y direction is perpendicular to the X direction in the horizontal plane. Since the wall bushing 100 is disposed in an inclined manner in general, in order to test the anti-seismic response of the wall bushing 100 itself, the three-way acceleration sensor disposed on the wall bushing 100 should be arranged in a direction based on the wall bushing 100 itself, specifically, the three measurement directions of the third accelerometer A3 and the fourth accelerometer A4 are the axial direction Xs and the radial direction Zs of the wall bushing 100 and the Ys perpendicular to Xs and Zs, zs is located in the vertical plane, and Ys is the same as Y.
In this embodiment, the displacement measuring device further includes a displacement measuring device, as shown in fig. 5, the displacement measuring device includes a first displacement meter D1 respectively disposed on the top 210 of the vibration table 200, a second displacement meter D2 disposed on the supporting beam 310, and a third displacement meter D3 disposed on the outer surface of the wall bushing 100. The first D1, second D2 and third D3 displacement gauges are used to measure the absolute displacement of the table 210, the support 300 and the displacement on the casing sample, respectively, under seismic excitation. By installing the acceleration measuring device and the displacement measuring device on the test device, the acceleration and the displacement of the wall bushing 100 under the earthquake excitation can be measured, and the test results can be mutually checked by utilizing the relation between the acceleration and the displacement, so that the reliability of the measurement result of the sensor is ensured.
Specifically, a plurality of third displacement meters D3 are disposed on the outer surface of the wall bushing 100, and are respectively disposed at one end of the first bushing 111 close to the transition tank 130, one end of the first bushing 111 far from the transition tank 130, and the center of gravity of the first bushing 111, and the one end of the second bushing 112 close to the transition tank 130, one end of the second bushing 112 far from the transition tank 130, and the center of gravity of the second bushing 112.
The displacement measuring device may also be provided with at least two fourth displacement meters D4 according to actual needs, and the two fourth displacement meters D4 are respectively arranged at the centers of gravity of the first guide rod 121 and the second guide rod 122. The relative displacement of the outer sleeve 110 and the inner guide rod 120 at the center of gravity is measured by the third displacement meter D3 and the fourth displacement meter D4, so that the problems of collision, breakdown caused by insufficient air gap and the like of the outer sleeve 110 and the inner guide rod 120 in an earthquake are further judged and determined.
In this embodiment, the first displacement meter D1, the second displacement meter D2, the third displacement meter D3, and the fourth displacement meter D4 are three-way displacement sensors, and are configured to measure position values of the wall bushing 100 in the X direction, the Y direction, and the Z direction.
As shown in fig. 6, in this embodiment, the present invention further comprises a strain measuring device, which comprises a first strain gauge S1 disposed on the outer surface of the outer sleeve 110 and a second strain gauge S2 disposed on the outer surface of the inner guide rod 120, for evaluating the strain and deformation of the outer sleeve 110 and the inner guide rod 120, respectively, so as to determine the shock strength of the test sample.
Specifically, two first strain gauges S1 are respectively disposed at one end of the first sleeve 111 close to the transition tank 130 and one end of the second sleeve 112 close to the transition tank 130. Because the connection place of the wall bushing 100 and the transition tank 130 is the weakest link of earthquake resistance, and a strain measurement element is arranged at the connection place, the effect of strain testing can be achieved, and the testing cost can be saved. As shown in fig. 7 (a) and 7 (b), each first strain gauge S1 includes four three-way strain rosettes S11 (composed of three strain gauges arranged in three directions), the four three-way strain rosettes S11 are uniformly arranged along the periphery of the wall bushing 100, and each three-way strain rosette S11 is used for measuring strain values of the wall bushing 100 in the X direction, the Y direction and the Z direction, so that the effect of comprehensively measuring stress and deformation of the wall bushing 100 is achieved.
As shown in fig. 6, 8 (a) and 8 (b), the second strain gauge S2 is disposed at one end of the first guide rod 121 close to the transition tank 130 and at one end of the second guide rod 122 close to the transition tank 130. Each second strain gauge S2 includes four longitudinal strain gauges S21, the four longitudinal strain gauges S21 are circumferentially and uniformly arranged, and each longitudinal strain gauge S21 is used for measuring a strain value of the wall bushing 100 in the Z direction.
Preferably, the present invention further comprises a controller, and the vibration table 200, the acceleration measuring device, the displacement measuring device and the strain measuring device are electrically connected to the controller. The controller controls the vibration table 200 to start, the accelerometer to measure acceleration response, the displacement meter to measure displacement and strain, and the measured data are analyzed and calculated, so that the whole testing device can be automatically controlled and calculated. In the present embodiment, the accelerometer, the displacement meter and the strain gauge of each measuring point are connected to the controller, so as to clearly determine the seismic performance of the corresponding portion of the wall bushing 100.
The invention also provides an internal and external anti-seismic test method for the extra-high voltage direct current composite wall bushing 100, which comprises the following steps:
mounting the wall bushing 100 sample on the mounting plate 400;
a first accelerometer A1 is arranged on the table top 210 of the vibration table 200, a second accelerometer A2 is arranged on the support beam 310, a third accelerometer A3 is arranged on the outer sleeve 110, a fourth accelerometer A4 is arranged on the inner guide rod 120, and a fifth accelerometer A5 is arranged on the mounting plate 400; a first displacement meter D1 is arranged on the table top 210 of the vibration table 200, a second displacement meter D2 is arranged on the supporting beam 310, and a third displacement meter D3 is arranged on the outer surface of the outer sleeve 110; a first strain gauge S1 is arranged on the outer surface of the outer sleeve 110, and a first strain gauge S2 is arranged on the outer surface of the inner guide rod 120;
starting the vibration table 200;
the first accelerometer A1, the second accelerometer A2, the third accelerometer A3, the fourth accelerometer A4 and the fifth accelerometer A5 respectively collect acceleration values of the vibration table 200, the support beam 310, the outer sleeve 110, the inner guide rod 120 and the mounting plate 400; the first displacement meter D1, the second displacement meter D2 and the third displacement meter D3 respectively collect displacement values of the vibration table 200, the support beam 310 and the outer sleeve 110; the first strain gauge S1 and the second strain gauge S2 respectively collect strain values of the outer surface of the wall bushing 100;
the controller analyzes and processes the measured acceleration value, displacement value and strain value to determine the anti-seismic performance of the wall bushing 100 under the actual working condition.
All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention.
Claims (9)
1. An inner and outer anti-seismic test device for an extra-high voltage direct current composite wall bushing, which comprises an outer bushing and an inner guide rod arranged in the outer bushing, and is characterized by comprising an acceleration measuring device, a support, a mounting plate arranged on the support and a vibrating table arranged below the support, wherein the support is provided with a supporting beam for supporting the mounting plate;
the outer tube is including being located first sleeve pipe and the second sleeve pipe at transition jar both ends, the third accelerometer is two at least, first sheathed tube focus department with second sheathed tube focus department all is equipped with the third accelerometer, first sleeve pipe is close to the one end of transition jar, first sleeve pipe is kept away from the one end of transition jar, the second sleeve pipe is close to the one end of transition jar with the second sleeve pipe is kept away from the one end of transition jar all is equipped with the third accelerometer.
2. The extra-high voltage direct current composite wall bushing internal and external anti-seismic testing device according to claim 1, further comprising a transition tank, wherein the inner guide rods comprise a first guide rod and a second guide rod which are positioned at two ends of the transition tank, the number of the fourth accelerometers is at least two, and the fourth accelerometers are arranged at the gravity center of the first guide rod and the gravity center of the second guide rod.
3. The extra-high voltage direct current composite wall bushing internal and external anti-seismic test device of claim 1, wherein the acceleration measuring device further comprises a fifth speedometer arranged on the mounting plate.
4. The extra-high voltage direct current composite wall bushing internal and external anti-seismic test device according to claim 1, further comprising a displacement measurement device, wherein the displacement measurement device comprises a first displacement meter arranged on the vibration table, a second displacement meter arranged on the support beam, and a third displacement meter arranged on the outer bushing.
5. The extra-high voltage direct current composite wall bushing internal and external anti-seismic test device according to claim 4, further comprising a transition tank, wherein the outer bushing comprises a first bushing and a second bushing which are arranged at two ends of the transition tank, and wherein the number of the third displacement meters is multiple, and the third displacement meters are arranged at one end of the first bushing close to the transition tank, one end of the first bushing far away from the transition tank, the center of gravity of the first bushing, one end of the second bushing close to the transition tank, one end of the second bushing far away from the transition tank, and the center of gravity of the second bushing.
6. The extra-high voltage direct current composite wall bushing internal and external anti-seismic test device according to claim 1 or 5, further comprising a strain measurement device, wherein the strain measurement device comprises a first strain gauge arranged on the outer surface of the outer bushing and a second strain gauge arranged on the outer surface of the inner guide rod.
7. The extra-high voltage direct current composite wall bushing internal and external anti-seismic test device according to claim 6, further comprising a transition tank, wherein the outer bushing comprises a first bushing and a second bushing which are positioned at two ends of the transition tank, the inner guide rod comprises a first guide rod and a second guide rod which are positioned at two ends of the transition tank, the number of the strain gauges is at least two, the first strain gauge is arranged at one end of the first bushing close to the transition tank and at one end of the second bushing close to the transition tank, and the second strain gauge is arranged at one end of the first guide rod close to the transition tank and at one end of the second guide rod close to the transition tank.
8. The inside and outside anti-seismic testing device of the extra-high voltage direct current composite wall bushing according to any one of claims 1 to 6, further comprising a controller, wherein the vibration table and the acceleration measuring device are both electrically connected with the controller.
9. An inside and outside anti-seismic test method for an extra-high voltage direct current composite wall bushing is characterized by comprising the following steps:
installing the wall bushing sample on an installation plate, wherein the installation plate is arranged on a support beam of the support;
arranging a first accelerometer on the table top of the vibration table, arranging a second accelerometer on the supporting beam, arranging third accelerometers at two connecting positions of the outer sleeve and the transition tank and at two ends far away from the transition tank, and arranging a fourth accelerometer on the inner guide rod;
starting a vibrating table;
the method comprises the following steps that a first accelerometer, a second accelerometer, a third accelerometer and a fourth accelerometer respectively acquire acceleration values of a vibrating table, a supporting beam, an outer sleeve and an inner guide rod;
and analyzing and processing the measured acceleration value to determine the seismic performance of the wall bushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN107525643B (en) * | 2017-09-25 | 2024-02-13 | 南方电网科学研究院有限责任公司 | Extra-high voltage direct current wall bushing earthquake-resistant test device and test method |
| CN111675144A (en) * | 2020-06-11 | 2020-09-18 | 中国南方电网有限责任公司超高压输电公司天生桥局 | Wall bushing pressure test strutting arrangement |
| CN112269107B (en) * | 2020-09-18 | 2022-01-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Flexible straight sleeve anti-seismic test method and circuit considering change of insulation structure |
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