CN106323524B - System and method for measuring static tension of straight-line-shaped hardware fitting at end part of high-voltage sleeve of transformer - Google Patents
System and method for measuring static tension of straight-line-shaped hardware fitting at end part of high-voltage sleeve of transformer Download PDFInfo
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- CN106323524B CN106323524B CN201610687972.1A CN201610687972A CN106323524B CN 106323524 B CN106323524 B CN 106323524B CN 201610687972 A CN201610687972 A CN 201610687972A CN 106323524 B CN106323524 B CN 106323524B
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- 238000004458 analytical method Methods 0.000 description 2
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- 238000002474 experimental method Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
- G01L5/0033—Force sensors associated with force applying means applying a pulling force
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/16—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/16—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force
- G01L5/161—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force using variations in ohmic resistance
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Abstract
The invention discloses a system and a method for measuring static tension of a straight-line-shaped hardware fitting at the end part of a high-voltage bushing of a transformer, wherein a frame body comprises an upper cross beam, a lower cross beam, a left cross beam and a right cross beam, the upper cross beam and the lower cross beam of the frame body are both provided with two holes in the horizontal direction, the middle cross beam is provided with two holes in the horizontal direction, and the holes of the upper cross beam, the middle cross beam and the lower cross beam correspond to each other in the vertical direction; the middle cross beam comprises a fixing part and two connecting parts, two ends of the fixing part are arranged on the frame body through the connecting parts, the top of the fixing part is higher than the upper cross beam and the lower cross beam in the horizontal direction, and the bottom of the fixing part is lower than the upper cross beam and the lower cross beam in the horizontal direction; and the upper cross beam, the lower cross beam, the left cross beam, the right cross beam and the connecting part are all provided with tension sensors. The invention solves the problem that the stress of the linear hardware at the end part of the transformer bushing of the existing transformer substation is difficult to detect, and can realize convenient, real-time and accurate detection of the tension of the linear hardware.
Description
Technical Field
The invention relates to the field of electric power, in particular to a system and a method for measuring static tension of a linear fitting at the end part of a high-voltage sleeve of a transformer.
Background
The hardware fittings are iron or aluminum metal accessories widely used for power transmission lines, most hardware fittings need to bear large tensile force during operation, and some hardware fittings need to ensure good electrical contact. The extra-high voltage transformer substation transformer bushing end part wiring hardware fitting has the problems that due to the fact that the design is unreasonable, the strength of a bushing end part terminal post cover plate is insufficient, the sealing design has weak links and the like, the transverse stress of a terminal post at the top of the bushing exceeds the design value, water enters after the end part of the bushing deforms and sealing fails under the long-term action, and finally the main transformer is caused to generate turn-to-turn short circuit faults. In order to analyze the stress condition of the wiring fitting at the end part of the sleeve, a simulation analysis method is mainly adopted at present, but a plurality of assumed conditions are required to be set for the simulation analysis, the actual stress condition cannot be fully reflected, experimental data can not be obtained for verification, and great risk exists in guiding modification, so that a material object test needs to be carried out, and a basis is provided for optimization design. Because the shape of the casing end wiring hardware fitting is special, a good testing method and a good testing device are not provided at present, and most sensors are used for detection through direct manual operation, so that a physical stress test is difficult to develop, and tension information cannot be acquired in real time.
The invention with the application number of 200820054261.1 discloses a pressure test and temperature test device for a high-voltage sleeve and a low-voltage terminal board of a transformer, wherein an oil tank is arranged on a support, a high-voltage connector capable of mounting the high-voltage sleeve of the transformer and a low-voltage connector capable of mounting the terminal board at the low-voltage side of the transformer are arranged on the oil tank, an upper vent hole, a lower vent hole, an observation hole, a heating device and a temperature sensor are also arranged on the oil tank, a control box is arranged on the support, and the control box is electrically connected with the heating device and the temperature sensor. The invention can carry out sealing and high-temperature tests on the high-voltage bushing of the transformer, but can not detect the tension parameters of the hardware fittings at the end part of the bushing. The invention patent with the application number of 201320839446.4 discloses a high-voltage bushing end screen sensor, which comprises a lightning impulse protection module, a quick grounding module, an open-circuit voltage-limiting protection module and a detection output voltage, wherein the lightning impulse protection module introduces the detection output voltage into the ground through the quick grounding module after detecting that the output voltage exceeds a limit value, and the open-circuit voltage-limiting protection module adjusts the output range of the detection output voltage. However, the sensor can only detect the voltage parameter of the bushing of the power equipment, cannot detect the tension parameter of the fitting at the end part of the bushing, cannot judge whether the transverse stress of the wiring terminal at the top of the bushing exceeds a design value, and cannot obtain the actual stress condition of the fitting of the bushing.
Disclosure of Invention
In view of the above, the invention provides a system and a method for measuring the static tension of a straight-line-shaped fitting at the end part of a high-voltage sleeve of a transformer, which solve the problem that the actual stress of the straight-line-shaped fitting at the end part of the transformer sleeve of the existing transformer substation is difficult to detect, and can realize convenient, real-time and accurate detection of the tension of the straight-line-shaped fitting so as to monitor the use condition of the straight-line-shaped fitting and carry out timely maintenance or replacement.
The invention adopts the following technical scheme:
a static tension measuring system of a straight-line-shaped hardware fitting at the end part of a high-voltage bushing of a transformer comprises a frame body, wherein the frame body comprises an upper cross beam, a lower cross beam, a left cross beam and a right cross beam, the upper cross beam and the lower cross beam of the frame body are both provided with two holes in the horizontal direction, the middle cross beam is provided with two holes in the horizontal direction, and the holes of the upper cross beam, the middle cross beam and the lower cross beam correspond to each other in the vertical direction; the middle cross beam comprises a fixing part and two connecting parts, two ends of the fixing part are arranged on the frame body through the connecting parts, the top of the fixing part is higher than the upper cross beam and the lower cross beam in the horizontal direction, and the bottom of the fixing part is lower than the upper cross beam and the lower cross beam in the horizontal direction; and the upper cross beam, the lower cross beam, the left cross beam, the right cross beam and the connecting part are all provided with tension sensors.
Preferably, each connecting portion is provided with a tension sensor.
Preferably, four tension sensors are arranged in the connecting part and are uniformly distributed around the connecting part.
Preferably, the upper cross beam, the lower cross beam, the left cross beam and the right cross beam are respectively provided with two grooves, and the tension sensors are arranged in the grooves.
Preferably, two tension sensors are arranged in the groove in the vertical direction.
Preferably, the upper cross beam and the lower cross beam are both provided with inward convex blocks, and two holes of the upper cross beam and the lower cross beam are respectively arranged on the corresponding convex blocks.
Preferably, the thickness of the connecting portion is smaller than that of the frame body.
Preferably, the system for measuring the static tension of the straight-line-shaped hardware fitting at the end part of the high-voltage sleeve of the transformer further comprises a digital display meter, the digital display meter is connected with a binding post arranged on the frame body, and the binding post is electrically connected with the tension sensor.
Preferably, the system for measuring the static tension of the straight-line-shaped hardware fitting at the end part of the high-voltage sleeve of the transformer further comprises a power supply, wherein the power supply is connected with a wiring terminal arranged on the frame body, and the wiring terminal is electrically connected with the tension sensor.
A static tension measuring method of a straight-line-shaped hardware fitting at the end part of a high-voltage sleeve of a transformer comprises the following steps:
step 1, arranging tension sensors on an upper cross beam, a lower cross beam, a left cross beam, a right cross beam and a connecting part of a frame body, wherein the tension sensors arranged on the upper cross beam and the lower cross beam measure the stress of a linear hardware fitting in the Y direction; the tension sensors arranged on the left cross beam and the right cross beam measure the stress of the straight-line-shaped hardware fitting in the X direction; a tension sensor arranged in the connecting part measures the stress of the straight-line-shaped hardware in the Z direction;
and 3, outputting the tension parameter values obtained by each sensor, and respectively calculating the average values of the tension sensors for measuring the stress in the X direction, the Y direction and the Z direction to obtain the tension parameter values of the linear hardware fitting in the X direction, the Y direction and the Z direction.
The invention has the following beneficial effects:
the frame body and the connecting part are respectively provided with the plurality of tension sensors, the tension sensors arranged on the upper cross beam and the lower cross beam can measure the axial (Y direction) stress condition, the tension sensors arranged on the left cross beam and the right cross beam can measure the transverse (X direction) stress condition, the tension sensors arranged on the connecting part can measure the vertical (Z direction) stress condition, the number of the sensors for detecting the stress in each direction is multiple, the tension values measured by the plurality of sensors are averaged to obtain the final tension value, the inaccurate measuring result caused by the uneven stress of a single sensor is avoided, and the measuring accuracy is improved.
The tension sensor of the cross beam measures the stress condition in the Z direction, the middle cross beam comprises connecting parts at two ends and a fixing part in the middle, the thickness of the connecting parts is smaller than that of the fixing parts and the frame body, the fixing part is higher than the upper cross beam and the lower cross beam in the horizontal direction on the front side of the tension sensor, and the fixing part is lower than the upper cross beam and the lower cross beam on the back side of the tension sensor. The middle cross beam adopts the suspension structure, the connecting parts do not contact with the body to be tested, when external force is applied, the front surface of the fixing part is stressed, the force is transmitted to the connecting parts at two sides by the fixing part, and the test range is wider. Simultaneously, all set up force sensor in two connecting portion, and force sensor is a plurality of, and the parameter value that measures through a plurality of sensors is solved and is averaged, obtains the atress condition of Z direction, and measurement accuracy is higher.
The invention can detect the stress condition of the straight-line-shaped hardware fitting in real time, when the acquired tension parameter value is larger than the preset maximum value, the straight-line-shaped hardware fitting is judged to be possible to break, alarm information and position information are sent to the monitoring center, and the monitoring center sends out a maintainer to carry out on-site maintenance after recording. On also can send the warning message or send maintainer's cell-phone APP for the maintainer simultaneously, the maintainer feeds back the handling condition to the surveillance center after overhauing to the scene, by the surveillance center record.
The invention solves the problem that the actual stress condition of the wiring hardware fitting at the end part of the transformer bushing of the existing transformer substation is difficult to detect, and avoids the problem that the turn-to-turn short circuit fault of a main transformer is caused because the main transformer cannot be found, maintained or replaced in time when the hardware fitting is subjected to overlarge transverse stress and is likely to break; the invention facilitates the maintenance and test work and reduces the labor cost.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
Fig. 1 is a schematic structural view of a linear fitting static tension measuring system at the end of a transformer high-voltage bushing according to the present invention.
Fig. 2 is a schematic bottom view of fig. 1.
Fig. 3 is a left side view of the structure of fig. 1.
Fig. 4 is a schematic diagram of arrangement and wiring of sensors of the linear fitting static tension measuring system at the end of the high-voltage bushing of the transformer.
Fig. 5 is a schematic view of the sectional structure a-a of fig. 4.
FIG. 6 is a schematic view of the sectional structure B-B of FIG. 4.
Fig. 7 is a schematic view of a usage state of the linear fitting static tension measuring system for the end portion of the high-voltage bushing of the transformer according to the invention.
Fig. 8 is a flowchart of the method for measuring the static tension of the straight-line-shaped hardware at the end of the high-voltage bushing of the transformer according to the invention.
Fig. 9 is a flowchart of another embodiment of the method for measuring the static tension of the in-line hardware at the end of the high-voltage bushing of the transformer according to the invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
As shown in fig. 1 to 6, the invention provides a static tension measuring system for a straight fitting at an end of a high-voltage bushing of a transformer, which comprises a frame body 2, wherein the frame body 2 comprises an upper cross beam, a lower cross beam, a left cross beam and a right cross beam, and the upper cross beam and the lower cross beam of the frame body are both provided with two holes 4 in the horizontal direction. The middle part of the frame body is provided with a middle cross beam, the middle cross beam comprises a fixing part 7 and two connecting parts 6, and two ends of the fixing part 7 are respectively arranged on a left cross beam and a right cross beam of the frame body through the connecting parts 6. The fixing portion 7 is provided with two holes 4 in the horizontal direction, and the holes 4 of the upper cross beam, the middle cross beam and the lower cross beam correspond in the vertical direction.
The top of the fixing part 7 is higher than the upper cross beam and the lower cross beam in the horizontal direction, the bottom of the fixing part is lower than the upper cross beam and the lower cross beam in the horizontal direction, and the upper cross beam, the lower cross beam, the left cross beam, the right cross beam and the connecting part 6 are all provided with tension sensors. The thickness of the connecting portion 6 is smaller than that of the frame and the fixing portion 7. The middle cross beam adopts this kind of suspended structure, and connecting portion 6 contactless treats the body, and when exerting external force, the front (top) atress of fixed part 7, on the connecting portion 6 of both sides was conducted by fixed part 7 to the power, through the tension sensor 602 in the connecting portion 6 measurement treat the body (style of calligraphy gold utensil) Z direction atress condition, the test range of this kind of structure is wider, and measurement accuracy is higher. Simultaneously, all set up force sensor in two connecting portion, and force sensor is a plurality of, and the parameter value that measures through a plurality of sensors is solved and is averaged, obtains the atress condition of Z direction, and measurement accuracy is higher.
In one embodiment, a groove may be formed at a position on the frame where the tension sensor needs to be installed, and then the corresponding tension sensor may be embedded in the groove. For example, in order to measure the stress condition in the Y direction (axial direction), two grooves 301 are provided on the upper cross beam and the lower cross beam, in this embodiment, the number of the grooves 301 of the upper cross beam and the lower cross beam is two, as shown in fig. 4 to 6, two tension sensors 302 are provided in each groove 301 along the vertical direction, the 8 tension sensors 302 respectively measure the stress value of the in-line hardware fitting in the Y direction, an average value is obtained, and the final average value is the stress value of the in-line hardware fitting in the Y direction. Set up recess 101 on left crossbeam and right crossbeam, recess 101 is two, sets up two force sensor 102 along the vertical direction in every recess 101, and these 8 force sensor 102 measure the stress value of a style of calligraphy gold utensil X direction respectively, ask for the average value, and final average value is the stress value of a style of calligraphy gold utensil in the X direction promptly.
The X direction (lateral direction), the Y direction (axial direction), and the Z direction (vertical direction) respectively represent the X-axis, Y-axis, and Z-axis directions of the spatial rectangular coordinate system.
Each connecting part 6 is internally provided with a tension sensor 602, and the four tension sensors 602 are uniformly distributed around the connecting part 6. The 8 tension sensors 602 measure the stress values of the straight-line hardware fitting in the Z direction respectively, and an average value is obtained, wherein the final average value is the stress value of the straight-line hardware fitting in the Z direction.
In one embodiment, inward protrusions 5 are provided on both the upper and lower beams of the frame, and two holes 4 of the upper and lower beams are provided on the corresponding protrusions 5, respectively. The two bumps 5 are horizontally arranged in parallel with the fixing part 7. The top of the fixing part 7 is higher than the bump 5 in the horizontal direction, the bottom is lower than the bump 5 in the horizontal direction, and the thickness of the connecting part 6 is smaller than that of the frame and the fixing part 7. Thus, the fixing portion 7 is higher on the front side of the present invention, the fixing portion 7 is lower on the back side of the present invention, and the height of the connecting portion 6 is lower regardless of whether the connecting portion is on the front side or the back side, and when a force in the vertical direction is applied, the fixing portion 7 directly receives the force, the force is transmitted to the connecting portions 6 on both sides, and the tension sensor 602 provided in the connecting portion 6 detects the tension value.
In one embodiment, the system for measuring the static tension of the straight-line-shaped hardware fitting at the end part of the high-voltage bushing of the transformer further comprises a digital display meter, the digital display meter is connected with a binding post arranged on the frame body, and the binding post is electrically connected with the tension sensor. FIG. 4 is a schematic diagram of the wiring arrangement of the sensors of the present invention, the arrow direction represents the lead direction, the wiring slot is formed in the frame, the wires are arranged in the wiring slot, and each sensor is connected with the binding post through the wires. When the stress condition of the straight-line-shaped hardware fitting is measured, the measured tension value can be displayed by the digital display meter, and the digital display meter is convenient for workers to record.
In one embodiment, the system for measuring the static tension of the straight-line-shaped hardware fitting at the end part of the high-voltage bushing of the transformer further comprises a power supply, wherein the power supply is connected with a terminal 8 arranged on the frame body, and the terminal is electrically connected with the tension sensor. The power supply supplies power for the tension sensor and the digital display meter. The power source may be a lithium battery.
As shown in fig. 8, a method for measuring the static tension of a straight-line-shaped fitting at the end of a high-voltage bushing of a transformer includes the following steps:
step 1, arranging tension sensors on an upper cross beam, a lower cross beam, a left cross beam, a right cross beam and a connecting part of a frame body, wherein the tension sensors arranged on the upper cross beam and the lower cross beam measure the stress of a linear hardware fitting in the Y direction; the tension sensors arranged on the left cross beam and the right cross beam measure the stress of the straight-line-shaped hardware fitting in the X direction; a tension sensor arranged in the connecting part measures the stress of the straight-line-shaped hardware in the Z direction;
and 3, outputting the tension parameter values obtained by each sensor, and respectively calculating the average values of the tension sensors for measuring the stress in the X direction, the Y direction and the Z direction according to the classification of the tension sensors in the X direction, the Y direction and the Z direction to obtain the tension parameter values of the linear hardware in the X direction, the Y direction and the Z direction.
The basic principle of the resistance strain test method is that a resistance strain gauge is used to measure the linear strain of the surface of a member, and then the stress state of the surface of the member is determined according to the strain-stress relationship. The method is that the resistance value of the resistance strain gauge changes correspondingly when the member deforms, then the resistance strain gauge converts the resistance change into the change of voltage (or current), and then the change is converted into the strain value or the signal of the voltage (or current) proportional to the strain value is output, and the measured strain or stress can be obtained by recording the signal by the recorder.
The theoretical formula of the resistance strain effect is as follows:
in the formula:
ρ is the resistivity (Ω. mm)2/m）；
L is the length (m) of the wire;
s is the sectional area (mm) of the metal wire2）；
As can be seen from the above equation, when the wire is subjected to a stress and is mechanically deformed, the three values ρ and L, S change, which inevitably causes a change in the resistance value of the wire. When the cable is stretched by an external force, the length is increased, the sectional area is reduced, and the resistance value is increased; when the pressure is reduced, the length is reduced, the sectional area is increased, and the resistance value is reduced. Therefore, the strain of the wire can be measured as long as the change in resistance is measured. The conversion relationship is as follows:
。
in the formula:
is the variation of the resistance value of the metal wire; k0Strain sensitive coefficient of metallic materialIt is determined primarily by experimental methods and is essentially constant within elastic limits; ε is the axial strain value of the metal material, hence the value of the strain is also called the length strain, and for the wire, the value is between 0.24 and 0.4.
In practical application, the metal resistance strain gauge is adhered to the surface of the sensor elastic element or the mechanical part to be measured. When the elastic element or the tested mechanical part in the sensor is stressed by an acting force to generate strain, the strain gauge adhered to the elastic element or the tested mechanical part is subjected to the same mechanical deformation, so that the resistance of the strain gauge is correspondingly changed. At this time, the resistance strain gauge converts the mechanical quantity into a resistance variation and outputs the resistance variation.
The static tensile force measurement system of style of calligraphy gold utensil sets up the screw corresponding with the hole on the style of calligraphy gold utensil in the framework, and the diameter of screw is less than the diameter in the hole of a style of calligraphy gold utensil, adopts the bolt fastening during the use, simultaneously because the aperture of screw is less, easy to assemble is fixed, has avoided can't pass the hole of a style of calligraphy gold utensil through the bolt of screw when fixed. In this embodiment, the specific parameters of the tension sensor are as follows: measuring range: x, Y, Z all have three directions of 5000N; precision: five thousandths of a word; power supply: 24V; and (3) outputting: 0-5V.
According to the shape of the straight-line-shaped transformer bushing end part wiring hardware fitting, the straight-line-shaped hardware fitting static tension measuring system is manufactured in a specific size. As shown in fig. 7, the straight-line-shaped hardware static tension measuring system 9 is firstly fixed on the straight-line-shaped hardware 11 on the left and right sides of the sleeve 10 through the bolt with the diameter of M12, then the wire clamp is fixed on the manufactured straight-line-shaped hardware static tension measuring system 9 through the bolt with the diameter of M12, after the straight-line-shaped hardware 11 at the end part of the transformer sleeve, the straight-line-shaped hardware static tension measuring system 9 and the wire clamp are fixed, the stress condition of the straight-line-shaped hardware 11 at the end part of the transformer sleeve can be reflected through the change of the tension sensor in the straight-line-shaped hardware static tension measuring system 9, the stress borne by the straight-line-shaped hardware at the end part of the transformer sleeve can be tested in real time, and is output through the digital display head.
In one embodiment, as shown in FIG. 9, the present invention comprises the steps of:
step 1, arranging tension sensors on an upper cross beam, a lower cross beam, a left cross beam, a right cross beam and a connecting part of a frame body, wherein the tension sensors arranged on the upper cross beam and the lower cross beam measure the stress of a linear hardware fitting in the Y direction; the tension sensors arranged on the left cross beam and the right cross beam measure the stress of the straight-line-shaped hardware fitting in the X direction; a tension sensor arranged in the connecting part measures the stress of the straight-line-shaped hardware in the Z direction;
step 3, outputting the tension parameter values obtained by each sensor, classifying the tension sensors according to the X direction, the Y direction and the Z direction, and respectively calculating the average values of the tension sensors for measuring the stress in the X direction, the Y direction and the Z direction to obtain the tension parameter values of the linear hardware fitting in the X direction, the Y direction and the Z direction;
In this embodiment, except can real-time detection the pulling force value of style of calligraphy gold utensil, still can judge the behaviour in use of style of calligraphy gold utensil through the pulling force value of gathering, when the gold utensil is probably cracked, send alarm information, can in time discover and change or overhaul. For example, the maximum force which can be borne by the hardware is 100N, the preset maximum tensile force parameter value is 100N, if the adopted tensile force parameter value is greater than 100N, the hardware exceeds the maximum bearing force and is likely to break, at the moment, alarm information is sent to give an alarm, and the maintenance or replacement is carried out on site through a maintenance worker.
In one embodiment, the present invention comprises the steps of:
step 1, arranging tension sensors on an upper cross beam, a lower cross beam, a left cross beam, a right cross beam and a connecting part of a frame body, wherein the tension sensors arranged on the upper cross beam and the lower cross beam measure the stress of a linear hardware fitting in the Y direction; the tension sensors arranged on the left cross beam and the right cross beam measure the stress of the straight-line-shaped hardware fitting in the X direction; a tension sensor arranged in the connecting part measures the stress of the straight-line-shaped hardware in the Z direction;
step 3, outputting the tension parameter values obtained by each sensor, classifying the tension sensors according to the X direction, the Y direction and the Z direction, and respectively calculating the average values of the tension sensors for measuring the stress in the X direction, the Y direction and the Z direction to obtain the tension parameter values of the linear hardware fitting in the X direction, the Y direction and the Z direction;
and 5, acquiring the position information of the straight-line-shaped hardware fitting at the end part of the high-voltage sleeve of the transformer, and sending the position information while sending alarm information.
In the embodiment, when the straight fitting is judged to be broken possibly and alarm information is sent, the position information of the fitting is obtained and sent at the same time, so that a maintainer can quickly find a fault position and maintain the fitting on site. The method solves the problem that the actual transverse stress condition of the existing transformer substation bushing end part wiring hardware fitting is difficult to detect, and avoids the problem that the turn-to-turn short circuit fault of a main transformer is caused because the main transformer cannot be found, maintained or replaced in time when the hardware fitting is subjected to overlarge transverse stress and is likely to break; the invention facilitates the maintenance and test work and reduces the labor cost.
The method can detect the stress condition of the straight-line-shaped hardware fitting in real time, when the obtained tension parameter value is larger than the preset maximum value, the straight-line-shaped hardware fitting is judged to be broken possibly, alarm information and position information are sent to a monitoring center, and a maintainer is sent to a site for overhauling after the monitoring center records. On also can send the warning message or send maintainer's cell-phone APP for the maintainer simultaneously, the maintainer feeds back the handling condition to the surveillance center after overhauing to the scene, by the surveillance center record.
In one embodiment, when the obtained tension parameter value is larger than a preset maximum value, the straight-line-shaped hardware is judged to be broken possibly, alarm information and position information are sent to a monitoring center, and the monitoring center sends out a maintainer to a site for overhauling after recording. On also can send the warning message or send maintainer's cell-phone APP for the maintainer simultaneously, the maintainer feeds back the handling condition to the surveillance center after overhauing to the scene, by the surveillance center record.
In one embodiment, when the obtained value of the tensile force parameter is smaller than the preset maximum value, it is further determined whether the value is within a second preset value range, for example, when the tensile force applied to the in-line hardware is greater than 100N, the in-line hardware may break, when the tensile force applied to the in-line hardware is processed for a long time by 90-99N, and when the time reaches a certain node, for example, 100h, or reaches a certain number of times, the damage or the breakage may easily occur. And if the acquired tension parameter value is within the second preset value range, recording the occurrence time and the tension parameter value, and then continuing to detect. And if the acquired tension parameter value exceeds the preset time or times within the second preset value range, sending early warning information, and simultaneously sending position information to inform a maintainer of field maintenance. The method of the embodiment can further judge the use condition of the hardware, can find problems in time and avoid the tripping phenomenon caused by hardware fracture.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. The utility model provides a static tension measurement system of straight style of calligraphy gold utensil of transformer high-tension bushing tip which characterized in that: the frame comprises an upper cross beam, a lower cross beam, a left cross beam and a right cross beam, wherein the upper cross beam and the lower cross beam of the frame are both provided with two holes in the horizontal direction; the two ends of the fixing part are arranged on the frame body through the connecting part, the top of the fixing part is higher than the upper cross beam and the lower cross beam in the horizontal direction, and the bottom of the fixing part is lower than the upper cross beam and the lower cross beam in the horizontal direction; the upper cross beam, the lower cross beam, the left cross beam, the right cross beam and the connecting part are all provided with tension sensors; each connecting part is provided with a tension sensor; the thickness of the connecting part is smaller than that of the frame body.
2. The system for measuring the static tension of the straight-line-shaped hardware fitting at the end part of the high-voltage bushing of the transformer according to claim 1, wherein: four tension sensors are arranged in the connecting part and are uniformly distributed around the connecting part.
3. The system for measuring the static tension of the straight-line-shaped hardware fitting at the end part of the high-voltage bushing of the transformer according to claim 1, wherein: two grooves are formed in the upper cross beam, the lower cross beam, the left cross beam and the right cross beam, and the tension sensors are arranged in the grooves.
4. The system for measuring the static tension of the straight-line-shaped hardware fitting at the end part of the high-voltage bushing of the transformer according to claim 3, wherein: two tension sensors are arranged in the groove in the vertical direction.
5. The system for measuring the static tension of the straight-line-shaped hardware fitting at the end part of the high-voltage bushing of the transformer according to claim 1, wherein: the upper cross beam and the lower cross beam are both provided with inward convex blocks, and two holes of the upper cross beam and the lower cross beam are respectively arranged on the corresponding convex blocks.
6. The system for measuring the static tension of the straight-line-shaped hardware fitting at the end part of the high-voltage bushing of the transformer according to claim 1, wherein: the system for measuring the static tension of the straight-line-shaped hardware fitting at the end part of the high-voltage sleeve of the transformer further comprises a digital display meter, wherein the digital display meter is connected with a binding post arranged on the frame body, and the binding post is electrically connected with the tension sensor.
7. The system for measuring the static tension of the straight-line-shaped hardware fitting at the end part of the high-voltage bushing of the transformer according to claim 1, wherein: the static tension measuring system of the straight-line-shaped hardware fitting at the end part of the high-voltage sleeve of the transformer further comprises a power supply, wherein the power supply is connected with a wiring terminal arranged on the frame body, and the wiring terminal is electrically connected with the tension sensor.
8. The use method of the straight-line-shaped hardware fitting static tension measuring system at the end part of the high-voltage sleeve of the transformer is characterized in that:
the system for measuring the linear fitting static tension at the end part of the high-voltage sleeve of the transformer comprises a frame body, wherein the frame body comprises an upper cross beam, a lower cross beam, a left cross beam and a right cross beam, the upper cross beam and the lower cross beam of the frame body are both provided with two holes in the horizontal direction, the middle cross beam is arranged in the middle of the frame body and comprises a fixing part and two connecting parts, the fixing part is provided with two holes in the horizontal direction, and the holes of the upper cross beam, the middle cross beam and the lower cross beam correspond to each other in the vertical direction; the two ends of the fixing part are arranged on the frame body through the connecting part, the top of the fixing part is higher than the upper cross beam and the lower cross beam in the horizontal direction, and the bottom of the fixing part is lower than the upper cross beam and the lower cross beam in the horizontal direction; the upper cross beam, the lower cross beam, the left cross beam, the right cross beam and the connecting part are all provided with tension sensors;
the method comprises the following steps:
step 1, arranging tension sensors on an upper cross beam, a lower cross beam, a left cross beam, a right cross beam and a connecting part of a frame body, wherein the tension sensors arranged on the upper cross beam and the lower cross beam measure the stress of a linear hardware fitting in the Y direction; the tension sensors arranged on the left cross beam and the right cross beam measure the stress of the straight-line-shaped hardware fitting in the X direction; a tension sensor arranged in the connecting part measures the stress of the straight-line-shaped hardware in the Z direction;
step 2, arranging a linear fitting static tension measuring system at the end part of the high-voltage sleeve of the transformer on a linear fitting, and detecting the stress condition of the linear fitting by using a tension sensor to obtain a tension parameter value;
and 3, outputting the tension parameter values obtained by each sensor, and respectively calculating the average values of the tension sensors for measuring the stress in the X direction, the Y direction and the Z direction to obtain the tension parameter values of the linear hardware fitting in the X direction, the Y direction and the Z direction.
9. The use method of the straight-line-shaped hardware fitting static tension measuring system at the end part of the high-voltage sleeve of the transformer is characterized in that:
use of the in-line tool static tension measurement system for transformer high voltage bushing end according to any of claims 1-7, comprising the steps of:
step 1, arranging tension sensors on an upper cross beam, a lower cross beam, a left cross beam, a right cross beam and a connecting part of a frame body, wherein the tension sensors arranged on the upper cross beam and the lower cross beam measure the stress of a linear hardware fitting in the Y direction; the tension sensors arranged on the left cross beam and the right cross beam measure the stress of the straight-line-shaped hardware fitting in the X direction; a tension sensor arranged in the connecting part measures the stress of the straight-line-shaped hardware in the Z direction;
step 2, arranging a linear fitting static tension measuring system at the end part of the high-voltage sleeve of the transformer on a linear fitting, and detecting the stress condition of the linear fitting by using a tension sensor to obtain a tension parameter value;
and 3, outputting the tension parameter values obtained by each sensor, and respectively calculating the average values of the tension sensors for measuring the stress in the X direction, the Y direction and the Z direction to obtain the tension parameter values of the linear hardware fitting in the X direction, the Y direction and the Z direction.
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| JP7184698B2 (en) * | 2019-03-29 | 2022-12-06 | 株式会社レプトリノ | force sensor |
| CN110530566B (en) * | 2019-10-10 | 2021-09-03 | 国网河南省电力公司电力科学研究院 | System and detection method for monitoring pressure of opening and closing spring of circuit breaker |
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| US4905523A (en) * | 1987-04-24 | 1990-03-06 | Wacoh Corporation | Force detector and moment detector using resistance element |
| GB2209245A (en) * | 1987-08-28 | 1989-05-04 | Gen Electric Co Plc | Method of producing a three-dimensional structure |
| US5490427A (en) * | 1994-10-17 | 1996-02-13 | Fanuc Usa Corporation | Six axis force sensor employing multiple shear strain gages |
| CN1916579A (en) * | 2006-09-11 | 2007-02-21 | 东华大学 | 2D force sensor of dynamic friction testing for fabric |
| US7516675B2 (en) * | 2007-07-03 | 2009-04-14 | Kulite Semiconductor Products, Inc. | Joystick sensor apparatus |
| DE112009004288T5 (en) * | 2009-02-06 | 2012-11-08 | Abb Ag | Set of multi-axis force and torque sensors and assembly methods |
| CN102095534B (en) * | 2010-12-08 | 2014-02-19 | 上海交通大学 | Double rood beam high-sensitivity six-dimensional moment sensor |
| KR101335432B1 (en) * | 2012-05-10 | 2013-11-29 | 전자부품연구원 | Force-torque sensor, force-torque sensor frame and force-torque measuring method |
| CN206074164U (en) * | 2016-08-19 | 2017-04-05 | 国网河南省电力公司电力科学研究院 | Transformer high-voltage bushing end yi word pattern gold utensil three-dimensional pulling force sensor |
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