A zero value detection system for insulating strings

Abstract

The invention discloses a zero value detection system for an insulating string, comprising an insulating rod, wherein the upper end of the insulating rod is connected to a base through a rotating member, a fixed column is fixedly installed on the base, a voltage conversion module is fixedly installed inside the fixed column, two first conductive sheets are fixedly connected to the outer wall of the fixed column, a rotating wheel is rotatably connected to the fixed column, a plurality of detection feet are provided on the rotating wheel in the form of a circular array, and a display is fixedly installed on the side wall of the lower end of the insulating rod. The invention pulls the insulating rod to cause a guide plate to slide on the insulating string, thereby realizing zero value detection of each single-piece insulator one by one. When the guide plate slides from one end of the insulating string to the other end, the detection foot can detect each single-piece insulator on the insulating string, thereby completing the zero value detection of the insulating string, avoiding missing individual single-piece insulators, and facilitating the safe operation of the power grid.

Description

Technical Field

[0001] The invention relates to the technical field of zero value detection of insulating strings, in particular to a zero value detection system of insulating strings. Background Art

[0002] Under the long-term mechanical and electrical loads, especially accompanied by the climate effects of wind, frost, snow and rain, some insulating strings will deteriorate to a certain extent, or even to zero value. In this case, the rated phase voltage will be shared by the remaining intact insulating strings in the same string, which will cause the following consequences:

[0003] 1. The electric field strength at both ends of the other insulated strings in the string increases, which reduces the insulation performance of the line when facing switching overvoltage and lightning overvoltage;

[0004] 2. It will accelerate the aging speed of the remaining porcelain insulation strings, reduce the service life of intact insulation strings, reduce the operating life of the line, and reduce the reliability of line operation under special meteorological conditions;

[0005] 3. The zero-value insulation string reduces the creepage distance of the insulation string, increasing the possibility of surface discharge of the insulation string on rainy days, posing a potential threat to the safe operation of the line;

[0006] Therefore, it is necessary to regularly conduct zero-value tests on the insulation strings, so that low-value and zero-value insulation strings can be discovered in time and replaced to ensure the safe and stable operation of the line. At present, once the insulation strings used on the transmission lines in the power system are broken down, they will lose their insulation performance (commonly known as "zero value"). In order to ensure the safe operation of the transmission line, the failed insulation strings should be replaced in time. How to quickly and accurately identify the failed insulation strings is one of the difficult problems in the maintenance of transmission lines. At present, workers are generally required to lift the detection instrument to the vicinity of the insulation string through the insulating rod, and put the two probes of the detection instrument in the grooves on both sides of each single insulator in turn to achieve one by one. The single-piece insulators are inspected individually. Since the workers are far away from the insulating strings and the density of single-piece insulators on the insulating strings is high, it is easy for the workers to be dazzled and miss individual single-piece insulators, leaving potential hidden dangers for the safe operation of the power grid; the Chinese patent application number CN201510734501.7 "A method and device for online detection of defects in insulator strings for DC transmission projects" specifically discloses that the two tentacles of the insulator string climbing robot are respectively connected to the insulating hardware of the insulator to be tested and the insulating hardware of the rear insulator, and the feedback signal is collected through the insulating hardware of the rear insulator, and compared with the standard signal to determine the state of the insulator. Summary of the invention

[0007] The object of the present invention is to provide a zero value detection system for an insulating string to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a zero-value detection system for an insulating string, comprising an insulating rod, wherein the upper end of the insulating rod is connected to a base through a rotating member, and the lower end of the insulating rod is provided with a handle. After holding the handle, the user lifts the base upward to a high place through the insulating rod, which is beneficial for the user to perform zero-value detection on the insulating string away from the insulating string. A fixed column is fixedly installed on the base, and a voltage conversion module is fixedly installed inside the fixed column. Two first conductive sheets are fixedly connected to the outer wall of the fixed column, and the two first conductive sheets are electrically connected to the voltage conversion module through wires. The voltage conversion module will convert the voltage of the insulating string into a standard voltage in proportion. A rotating wheel is rotatably connected to the fixed column. The rotating wheel is provided with a plurality of detection feet in a circular array which move alternately in the grooves of the insulating string. The two detection feet located directly in front of the base are respectively pressed into two adjacent grooves of the insulating string. The monolithic insulator between the two grooves forms a detection electrical circuit with the voltage conversion module and the two first conductive sheets, so as to realize zero-value detection of the monolithic insulator between the two grooves. The plurality of detection feet are alternately moved in the grooves of the insulating string by pushing the insulating rod, so as to realize zero-value detection of each monolithic insulator one by one. A display is fixedly installed on the side wall of the lower end of the insulating rod. The display is electrically connected to the voltage conversion module through a wire. A digital voltmeter and an alarm module which are electrically connected to the power supply module are fixedly installed inside the display.

[0009] Preferably, the rotating member includes a rotating seat, a rotating disk, a plug-in slot, a plug-in rod, a first bolt and a second bolt. The rotating seat is fixedly connected to the side wall of the base, the rotating disk is rotatably connected to the rotating seat, the first bolt is sleeved on the side wall of the rotating disk, and the threaded end of the first bolt passes through the rotating disk and is meshed and connected to the inside of the rotating seat, the plug-in rod is fixed to the upper end of the insulating rod, and the rotating disk is provided with the plug-in slot with the opening facing downward, the plug-in rod is plugged into the inside of the plug-in slot and fixed by the second bolt to achieve a fixed connection between the insulating rod and the rotating disk.

[0010] Preferably, the detection foot includes a support rod, and one end of the support rod facing away from the rotating wheel is rotatably connected to a pressure plate via a torsion spring, and a second conductive sheet for fitting to the side wall of the insulating string groove is fixedly installed on the side wall of the pressure plate, and a third conductive sheet is electrically connected to the rear side wall of the second conductive sheet via a wire, and the third conductive sheet is fixedly connected to the inner side wall of the rotating wheel, and the third conductive sheet is movably connected to the first conductive sheet.

[0011] Preferably, the support rod is slidably connected to the side wall of the rotating wheel, and one end of the rotating wheel is rotatably connected to an adjusting disk, the side wall of the adjusting disk is provided with a spiral thread groove, and a slider is fixedly connected to the side wall of the support rod, and the slider passes through the side wall of the rotating wheel and is slidably connected to the inside of the spiral thread groove to realize that after the adjusting disk rotates, the support rod is caused to slide toward or away from the center of the rotating wheel.

[0012] Preferably, a bracket is fixedly connected to a side wall of the base, a connecting rod is fixedly installed on the bracket, a support plate is fixedly installed on the end of the connecting rod away from the bracket, a guide slide plate is slidably connected to the support plate via a guide column, and a spring for pressing the support plate is sleeved on the guide column.

[0013] Preferably, both ends of the guide slide plate are folded outward and tilted, which is conducive to the guide slide plate sliding on the insulating string.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention places the guide slide plate and the detection foot on both sides of the insulating string, and the elastic force of the spring prompts the guide slide plate and the detection foot to generate a clamping force on the insulating string, so that the second conductive sheet of the detection foot will be tightly attached to the groove of the insulating string, and by pulling the insulating rod, the guide slide plate slides on the insulating string. During the sliding process, multiple detection feet move alternately in the groove of the insulating string to achieve zero-value detection of each single-piece insulator one by one. When the guide slide plate slides from one end of the insulating string to the other end, the detection foot can detect each single-piece insulator on the insulating string, thereby completing the zero-value detection of the insulating string, avoiding missing individual single-piece insulators, and facilitating the safe operation of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The overall structure of the present invention is shown in FIG. Figure I ;

[0016] Figure 2 The overall structure of the present invention is shown in FIG. Figure II ;

[0017] Figure 3 The overall structure of the present invention is shown in FIG. Figure III ;

[0018] Figure 4 It is a structural schematic diagram of the insulating rod, rotating seat, rotating disk and base of the present invention;

[0019] Figure 5 The structure of the insulating rod, base, guide plate and detection foot of the present invention is schematically shown. Figure I ;

[0020] Figure 6 The structure of the insulating rod, base, guide plate and detection foot of the present invention is schematically shown. Figure II ;

[0021] Figure 7 It is an exploded view of the insulating rod, the rotating member and the base of the present invention;

[0022] Figure 8 An exploded view of the base, the fixing column and the first conductive sheet of the present invention;

[0023] Fig. 9 It is a cross-sectional view of the fixing column, the voltage conversion module and the first conductive sheet of the present invention;

[0024] Fig.10 It is a structural schematic diagram of the fixed column, rotating wheel, display instrument and adjustment disk of the present invention;

[0025] Fig.11 It is an exploded view of the fixed column, rotating wheel, adjusting disk and sliding block of the present invention;

[0026] Fig.12 It is an exploded view of the adjusting disk, the supporting rod and the pressing plate of the present invention;

[0027] Fig.13 It is a cross-sectional view of the fixed column, the rotating wheel, the support rod and the pressure plate of the present invention;

[0028] Fig.14 It is a cross-sectional exploded view of the voltage conversion module, the first conductive sheet, the second conductive sheet, the third conductive sheet, the support rod and the pressing plate of the present invention;

[0029] Fig.15 It is a schematic structural diagram of the support rod, torsion spring, pressure plate, second conductive sheet and third conductive sheet of the present invention.

[0030] In the figure: 1. insulating rod, 101. handle, 2. rotating part, 201. rotating seat, 202. rotating disk, 203. plug-in slot, 204. plug-in rod, 205. first bolt, 206. second bolt, 3. base, 4. fixing column, 5. voltage conversion module, 6. first conductive sheet, 7. rotating wheel, 8. detection foot, 801. support rod, 802. torsion spring, 803. pressure plate, 804. second conductive sheet, 805. third conductive sheet, 9. display instrument, 901. digital voltmeter, 902. alarm module, 903. power module, 10. adjusting disk, 11. slider, 12. bracket, 13. connecting rod, 14. support plate, 15. guide column, 16. guide slide plate, 17. spring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-15 The present invention provides a technical solution: a zero value detection system for an insulating string, comprising an insulating rod 1, wherein the upper end of the insulating rod 1 is connected to a base 3 through a rotating member 2, and a handle 101 is provided at the lower end of the insulating rod 1. After the user holds the handle 101, the base 3 is lifted up to a high place through the insulating rod 1, which is conducive to the user to perform zero value detection on the insulating string at a distance away from the insulating string. A fixed column 4 is fixedly installed on the base 3, and a voltage conversion module 5 is fixedly installed inside the fixed column 4. Two first conductive sheets 6 are fixedly connected to the outer wall of the fixed column 4, and the two first conductive sheets 6 are electrically connected to the voltage conversion module 5 through a wire. The voltage conversion module 5 will proportionally convert the voltage on the insulating string into a standard voltage. A rotating wheel 7 is rotatably connected to the fixed column 4, and a plurality of detection feet 8 that move alternately in the groove of the insulating string are provided on the rotating wheel 7 in the form of a circular array. The two detection feet 8 located in front of the base 3 are respectively pressed in two adjacent grooves of the insulating string. The single-piece insulator between the two grooves is connected to the voltage conversion module 5 and the two first conductive sheets. 6 forms a detection circuit to realize zero-value detection of the monolithic insulator between the two grooves. By pushing the insulating rod 1, multiple detection feet 8 are alternately moved in the grooves of the insulating string to realize zero-value detection of each monolithic insulator one by one. A display instrument 9 is fixedly installed on the side wall of the lower end of the insulating rod 1. The display instrument 9 is electrically connected to the voltage conversion module 5 through a wire. A digital voltmeter 901, an alarm module 902 and a power supply module 903 are fixedly installed inside the display instrument 9. The voltage conversion module 5 converts the detected insulation string voltage The value is transmitted to the digital voltmeter 901 through the wire, and the digital voltmeter 901 will display the voltage value of the insulating string in digital form. If the voltage value of the insulating string is zero, the digital voltmeter 901 will transmit the zero value information to the alarm module 902, and the alarm module 902 will issue a zero value signal alarm to remind the user. The alarm module 902 can use a light alarm or a buzzer, and the power module 903 preferably uses a rechargeable lithium battery. The power module 903 provides power for the digital voltmeter 901 and the alarm module 902.

[0033] like Figure 2 , 3As shown, in order to facilitate the detection of insulating strings installed at different angles, specifically, the rotating member 2 includes a rotating seat 201, a rotating disk 202, a plug-in slot 203, a plug-in rod 204, a first bolt 205 and a second bolt 206. The rotating seat 201 is fixedly connected to the side wall of the base 3, the rotating disk 202 is rotatably connected to the rotating seat 201, the first bolt 205 is sleeved on the side wall of the rotating disk 202, and the threaded end of the first bolt 205 is meshed and connected to the inside of the rotating seat 201, and the plug-in rod 204 is fixed to the upper end of the insulating rod 1, the plug-in rod 204 is plugged into the inside of the plug-in slot 203 and fixed by the second bolt 206 to achieve a fixed connection between the insulating rod 1 and the rotating disk 202.

[0034] The connection process between the base 3 and the insulating rod 1 is as follows: Figure 7 As shown, the plug-in rod 204 is plugged into the inside of the plug-in slot 203, and then the second bolt 206 is inserted into the inside of the rotating disk 202 horizontally, and the second bolt 206 penetrates the side wall of the plug-in rod 204 and then engages with the inside of the rotating disk 202. At this time, the insulating rod 1 and the rotating disk 202 are in a fixed connection, and then the threaded end of the first bolt 205 is engaged with the side wall of the rotating seat 201. At this time, the rotating seat 201 and the rotating disk 202 are relatively fixed, so that the connection between the base 3 and the insulating rod 1 can be completed;

[0035] like Figure 2 , 3 As shown, in the installation of the insulating string, the angle of the insulating string is mostly set vertically or horizontally. In order to facilitate the detection of the insulating strings installed at different angles, it is necessary to change the angle of the base 3 on the insulating rod 1. The process of angle conversion of the base 3 on the insulating rod 1 is: rotate the first bolt 205, so that the threaded end of the first bolt 205 is unscrewed from the rotating seat 201, and the rotating seat 201 and the rotating disk 202 can rotate relative to each other, and then the base 3 can be rotated on the insulating rod 1 to achieve the change of the angle of the base 3 on the insulating rod 1, so as to facilitate the detection of the insulating strings installed vertically or horizontally. After the angle conversion is completed, the threaded end of the first bolt 205 is engaged with the rotating seat 201, and the base 3 and the insulating rod 1 are fixed in the rotated state.

[0036] like Fig.13 As shown, in order to transmit the voltage signal of the monolithic insulator to the voltage conversion module 5, specifically, the detection foot 8 includes a support rod 801, the outer end of the support rod 801 is rotatably connected to a pressure plate 803 through a torsion spring 802, and a second conductive sheet 804 for fitting to the side wall of the insulating string groove is fixedly installed on the side wall of the pressure plate 803, as shown in FIG. Fig.15As shown, the torsion spring 802 is fixedly sleeved on the rotating shaft of the pressing plate 803. When the pressing plate 803 is pressed against the inside of the groove of the insulating string, the pressing plate 803 will twist relative to the support rod 801, so that the second conductive sheet 804 can just fit on the side wall of the groove of the insulating string. When the pressing plate 803 is moved out of the groove of the insulating string, the pressing plate 803 can be reset by the torsion of the torsion spring 802. The third conductive sheet 805 is electrically connected to the rear side wall of the second conductive sheet 804 through a wire. The wire connecting the second conductive sheet 804 and the third conductive sheet 805 is connected by a retractable spiral wire. The third conductive sheet 805 is fixedly connected to the side wall of the rotating wheel 7, and the third conductive sheet 805 is movably connected to the first conductive sheet 6.

[0037] like Fig.13 As shown, when the two detection feet 8 located in front of the base 3 are respectively pressed into two adjacent grooves of the insulating string, the second conductive sheet 804 is pressed into the groove of the insulating string by the pressing plate 803. At this time, the third conductive sheet 805 electrically connected to the second conductive sheet 804 is electrically connected to the first conductive sheet 6. At this time, the single-piece insulator between the two grooves forms a detection electrical circuit with the second conductive sheet 804, the third conductive sheet 805, the voltage conversion module 5, and the two first conductive sheets 6, so as to realize zero-value detection of the single-piece insulator between the two grooves. As the rotating wheel 7 rotates along the insulating string, the multiple second conductive sheets 805 move alternately in the grooves of the insulating string, so as to realize zero-value detection of each single-piece insulator one by one, and avoid missed detection.

[0038] like Fig.11 , 12 As shown, in order to be able to perform zero value detection on insulating strings of different specifications, specifically, the support rod 801 is slidably connected to the side wall of the rotating wheel 7, and one end of the rotating wheel 7 is rotatably connected to an adjusting disk 10, and the side wall of the adjusting disk 10 is provided with a spiral thread groove, and a slider 11 is fixedly connected to the side wall of the support rod 801, and the slider 11 is slidably connected inside the spiral thread groove to realize that after the adjusting disk 10 rotates, the support rod 801 slides toward or away from the center of the rotating wheel 7.

[0039] like Fig.11 , 12As shown, according to the circuit installation requirements, different specifications of insulating strings may be required. The spacing between single-piece insulators on insulating strings of different specifications is different. Therefore, it is necessary to adjust the spacing between adjacent pressure plates 803 to meet the detection of insulating strings of different specifications. The process is: rotate the adjustment disk 10 to cause the slider 11 to slide inside the spiral thread groove, causing multiple support rods 801 to diffuse and slide outward or shrink and slide inward, causing the support rod 801 to slide during the sliding process. The spacing between two adjacent pressure plates 803 will change, which can be adapted to the use of insulating strings with different spacings between adjacent insulating strings.

[0040] like Figure 5 , 6 As shown, in order to facilitate the alternate movement of the second conductive sheet 804 on the detection foot 8 in the groove of the insulating string to realize the zero value detection of each single insulator one by one, specifically, a bracket 12 is fixedly connected to one side wall of the base 3, a connecting rod 13 is fixedly installed on the bracket 12, a support plate 14 is fixedly installed at one end of the connecting rod 13 away from the bracket 12, a guide slide plate 16 is slidably connected to the support plate 14 through a guide column 15, and a spring 17 for pressing the support plate 14 is sleeved on the guide column 15, as shown in FIG. Figure 5 , 6 As shown, the guide column 15 is fixed on the side wall of the guide slide plate 16, and the guide column 15 is slidably connected to the side wall of the support plate 14, and the spring 17 is sleeved on the guide column 15 located between the guide slide plate 16 and the support plate 14, and the spring 17 plays the role of pressing the guide slide plate 16 toward the base 3.

[0041] When the insulating string is installed on the high-voltage tower, the two ends of the insulating string are generally connected to a steel pipe or a high-voltage line with a smaller diameter. When detecting the insulating string, the user holds the handle 101, lifts the base 3 to the insulating string through the insulating rod 1, and then moves the base 3, causing the guide slide 16 and the detection foot 8 to move to both sides of the steel pipe or the high-voltage line, and then slides the base 3 toward one side of the insulating string. At this time, the guide slide 16 and the detection foot 8 will move to the insulating string, and the elastic force of the spring 17 will cause the guide slide 16 and the detection foot 8 to contact the insulation. The string generates a clamping force, so that the second conductive sheet 804 on the detection foot 8 located in the front will be tightly attached to the groove of the insulating string, and then through the insulating rod 1, the guide plate 16 will slide on the insulating string. During the sliding process, multiple detection feet 8 move alternately in the groove of the insulating string to achieve zero-value detection of each single insulator one by one. When the guide plate 16 slides from one end of the insulating string to the other end, the detection foot 8 can detect each single insulator on the insulating string, thereby completing the zero-value detection of the insulating string.

[0042] Specifically, the two ends of the guide slide plate 16 are folded outward and tilted, which is conducive to the guide slide plate 16 sliding on the insulating string.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A zero value detection system for an insulating string, comprising an insulating rod (1), characterized in that: The upper end of the insulating rod (1) is connected to a base (3) via a rotating member (2); a fixed column (4) is fixedly mounted on the base (3); a voltage conversion module (5) is fixedly mounted inside the fixed column (4); two first conductive sheets (6) are fixedly connected to the outer wall of the fixed column (4); the two first conductive sheets (6) are electrically connected to the voltage conversion module (5) via wires; the outer ring of the fixed column (4) is rotatably connected to a rotating wheel (7); a plurality of detection feet (8) are provided on the rotating wheel (7) in the form of a circular array and are alternately moved in the grooves of the insulating string; two detection feet (8) located directly in front of the base (3) are respectively pressed into two adjacent grooves of the insulating string; a display instrument (9) is fixedly mounted on the side wall of the lower end of the insulating rod (1); the display instrument (9) is connected to the voltage conversion module (5) via a wire; The conversion module (5) is electrically connected via a wire, and a digital display voltmeter (901) and an alarm module (902) which are respectively electrically connected to the power module (903) are fixedly installed inside the display instrument (9); the detection foot (8) comprises a support rod (801), and one end of the support rod (801) which faces away from the rotating wheel (7) is rotatably connected to a pressure plate (803) via a torsion spring (802); a second conductive sheet (804) for affixing to the side wall of the insulating string groove is fixedly installed on the side wall of the pressure plate (803); a third conductive sheet (805) is electrically connected to the rear side wall of the second conductive sheet (804) via a wire; the third conductive sheet (805) is fixedly connected to the inner side wall of the rotating wheel (7), and the third conductive sheet (805) is movably connected to the first conductive sheet (6).

2. The zero value detection system of an insulating string according to claim 1 is characterized in that: The rotating member (2) comprises a rotating seat (201), a rotating disk (202), a plug-in slot (203), a plug-in rod (204), a first bolt (205) and a second bolt (206); the rotating seat (201) is fixedly connected to the side wall of the base (3); the rotating disk (202) is rotatably connected to the rotating seat (201); the threaded end of the first bolt (205) passes through the rotating disk (202) and is meshedly connected to the inside of the rotating seat (201); the plug-in rod (204) is fixed to the upper end of the insulating rod (1); the rotating disk (202) is provided with the plug-in slot (203) with an opening facing downward; the plug-in rod (204) is plugged into the inside of the plug-in slot (203) and is fixed by the second bolt (206) to achieve a fixed connection between the insulating rod (1) and the rotating disk (202).

3. The zero value detection system of an insulating string according to claim 1 is characterized in that: The support rod (801) is slidably connected to the side wall of the rotating wheel (7); one end of the rotating wheel (7) is rotatably connected to an adjustment disk (10); a spiral thread groove is provided on the side wall of the adjustment disk (10); a slider (11) is fixedly connected to the side wall of the support rod (801); the slider (11) passes through the side wall of the rotating wheel (7) and is slidably connected to the inside of the spiral thread groove.

4. The zero value detection system of an insulating string according to claim 1 is characterized in that: A bracket (12) is fixedly connected to a side wall of one side of the base (3), a connecting rod (13) is fixedly mounted on the bracket (12), a support plate (14) is fixedly mounted on one end of the connecting rod (13) away from the bracket (12), a guide slide plate (16) is slidably connected to the support plate (14) via a guide column (15), and a spring (17) for pressing the support plate (14) is sleeved on the guide column (15).

5. The zero value detection system of an insulating string according to claim 4, characterized in that: The two ends of the guide slide plate (16) are folded outwards and tilted up.

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