CN115184714A - Insulator resistance measuring device and measuring method - Google Patents
Insulator resistance measuring device and measuring method Download PDFInfo
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- CN115184714A CN115184714A CN202211107368.9A CN202211107368A CN115184714A CN 115184714 A CN115184714 A CN 115184714A CN 202211107368 A CN202211107368 A CN 202211107368A CN 115184714 A CN115184714 A CN 115184714A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/003—Environmental or reliability tests
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
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Abstract
The application discloses insulator resistance measuring device and measuring method, the device includes: the device comprises a measuring box body, an insulator clamping assembly and a standard environment simulation assembly; the insulator clamping assembly is used for clamping an insulator hardware fitting; the standard environment simulation assembly adjusts and measures the temperature in the box body through the electric heating plate and the refrigerating sheet; adjusting the air pressure in the measuring box body through a vacuum pump; the temperature sensor, the humidity sensor and the air pressure sensor are arranged in the measuring box body; the industrial personal computer is used for controlling the start and stop of the electric heating plate, the refrigerating sheet and the vacuum pump, and is used for obtaining the temperature value, the humidity value and the air pressure value of the measuring box body. By arranging the insulator clamping assembly, the insulator hardware can be stably clamped and electrically connected; the process that temperature, humidity and atmospheric pressure change gradually in the natural environment can be simulated through standard environment simulation subassembly to the better laminating actual environment carries out resistance measurement to the insulator, improves measuring result's accuracy.
Description
Technical Field
The application relates to the technical field of insulator resistance measurement, in particular to an insulator resistance measurement device and a measurement method thereof.
Background
The main function of an insulator is to achieve electrical insulation, for which various electrical performance requirements are specified, such as: under the action of specified operating voltage, lightning overvoltage and internal overvoltage, breakdown or flashover along the surface does not occur; under the action of specified long-term and short-term mechanical load, the material is not damaged or destroyed; after long-term operation under the specified unit load, electric load and various environmental conditions, no obvious degradation is generated.
In addition, since the technical standards of the insulator vary according to the model number and the use condition, it is necessary to perform a test of variation in electrical, physical and environmental conditions before the insulator is used to measure the resistance performance of the insulator.
In the existing measuring mode, the parameter change of the natural environment can not be simulated accurately, so that the finally obtained resistance value is inaccurate. For example, patent document No. CN211402541U discloses a composite insulator insulation resistance tester apparatus simulating a mountain fire environment, which tests the resistance of an insulator by simulating the mountain fire environment with a smoke generator, but does not consider the influence of other comprehensive factors, so that the finally obtained measurement result is still not accurate enough.
Disclosure of Invention
In view of this, an object of the present application is to provide an insulator resistance measuring apparatus and a measuring method thereof, which are used to solve the problem of low accuracy of the existing insulator resistance measuring method.
In order to achieve the above technical object, the present application provides in a first aspect an insulator resistance measuring device, including: the device comprises a measuring box body, an insulator clamping assembly and a standard environment simulation assembly;
the insulator clamping assembly is used for clamping and electrically connecting an insulator hardware fitting;
the standard environment simulation component comprises: the device comprises an electric heating plate, a refrigerating sheet, a sprayer, a vacuum pump, a temperature sensor, a humidity sensor, an air pressure sensor and an industrial personal computer;
the electric heating plate and the refrigerating sheet are both arranged on the bottom surface in the measuring box body and are used for adjusting the temperature in the measuring box body;
the sprayer is arranged on the inner top surface of the measuring box body;
the vacuum pump is communicated with the measuring box body through a pipeline;
the temperature sensor, the humidity sensor and the air pressure sensor are respectively arranged on the inner wall of the measuring box body;
the industrial computer respectively with electric heating plate, refrigeration piece, spray thrower, vacuum pump, temperature sensor, humidity transducer and baroceptor communication connection are used for control opening of electric heating plate, refrigeration piece, spray thrower and vacuum pump stops to and be used for acquireing measure the temperature value, humidity value and the atmospheric pressure value of box.
Further, the insulator clamping assembly includes: the device comprises a left pneumatic claw, a right pneumatic claw, a left lead, a left measuring terminal, a right lead, a right measuring terminal and an insulator resistance tester;
the left pneumatic claw and the right pneumatic claw are respectively arranged on two sides of the inside of the measuring box body;
the left pneumatic claw and the right pneumatic claw are respectively provided with an upper clamping block and a lower clamping block which can slide oppositely;
the left measuring terminal is electrically connected with the upper clamping block and the lower clamping block on the left pneumatic claw through a left lead;
the right measuring terminal is electrically connected with the upper clamping block and the lower clamping block on the right pneumatic claw through a right lead;
and two measuring needles of the insulator resistance tester are respectively connected into the left measuring terminal and the right measuring terminal.
Further, insulator centre gripping subassembly still includes: an electric linear guide rail;
the electric linear guide rail is horizontally arranged on the inner wall of the measuring box body;
the right pneumatic claw is arranged on the electric linear guide rail in a sliding manner along the electric linear guide rail.
Further, the insulator gripping assembly further comprises a plurality of cable seals;
the air pipes of the left air claw and the right air claw are hermetically connected with the measuring box body through the cable sealing element;
the left lead and the right lead are connected with the measuring box body in a sealing mode through the cable sealing element.
Furthermore, the opposite surfaces of the upper clamping block and the lower clamping block are arc-shaped clamping surfaces;
the arc-shaped clamping surface is provided with a conductive metal block which is parallel and level to the end surface of the arc-shaped clamping surface;
the conductive metal block is electrically connected with the left lead or the right lead through a built-in lead.
Further, the conductive metal blocks comprise a plurality of conductive metal blocks, and the conductive metal blocks are uniformly arranged at intervals along the end face of the arc-shaped clamping face.
Further, the upper clamping block and the lower clamping block are both made of expanded polytetrafluoroethylene.
Further, the insulator clamping assembly further comprises a left proximity switch and a right proximity switch;
the left proximity switch is arranged on the left pneumatic claw and is positioned in the center between the upper clamping block and the lower clamping block on the left pneumatic claw;
the right proximity switch is arranged on the right pneumatic claw and is positioned in the center between the upper clamping block and the lower clamping block on the right pneumatic claw;
the left proximity switch and the right proximity switch are both in communication and electric connection with the industrial personal computer;
and the action distances of the left proximity switch and the right proximity switch are both mm.
Furthermore, an openable door is arranged on the measuring box body;
one side of the door is hinged with the measuring box body through a door shaft, and the other side of the door is provided with a sealing door lock;
the door with the butt joint department all around of measuring the box is provided with the seal groove, set up waterproof sealing circle in the seal groove.
A second aspect of the present application provides an insulator resistance measurement method, which is applied to any one of the insulator resistance measurement devices described above;
the method comprises the following steps:
s1, clamping and connecting an insulator hardware fitting to be tested to an insulator clamping assembly;
s2, adjusting environmental parameters through an industrial personal computer according to a preset rule, wherein the environmental parameters comprise a temperature value, a humidity value and an air pressure value, and the preset rule is as follows: adjusting the temperature value in the measuring box body to change between minus 40 ℃ and 70 ℃ every 10 ℃ as a change unit, adjusting the humidity value in the measuring box body to change between 20% and 90% by taking each difference of 10% as a change unit, adjusting the air pressure value to change between 100Pa, 0.1MPa and 0.2Ma, and setting the temperature value, the humidity value and the air pressure value to correspond to one environmental parameter every time the temperature value, the humidity value and the air pressure value are changed;
and S3, starting the insulator resistance tester to measure the resistance value of the insulator every time one environmental parameter is set, and recording the measurement result to form an environmental resistance value corresponding table of the insulator to be measured.
According to the technical scheme, the application provides an insulator resistance measuring device and a measuring method, and the device comprises: the device comprises a measuring box body, an insulator clamping assembly and a standard environment simulation assembly; the insulator clamping assembly is used for clamping and electrically connecting an insulator hardware fitting; the standard environment simulation assembly comprises: the device comprises an electric heating plate, a refrigerating sheet, a sprayer, a vacuum pump, a temperature sensor, a humidity sensor, an air pressure sensor and an industrial personal computer; the electric heating plate and the refrigerating sheet are arranged on the bottom surface in the measuring box body and are used for adjusting the temperature in the measuring box body; the sprayer is arranged on the inner top surface of the measuring box body; the vacuum pump is communicated with the measuring box body through a pipeline; the temperature sensor, the humidity sensor and the air pressure sensor are respectively arranged on the inner wall of the measuring box body; the industrial computer respectively with electric heating plate, refrigeration piece, spray thrower, vacuum pump, temperature sensor, humidity transducer and baroceptor communication connection are used for control opening of electric heating plate, refrigeration piece, spray thrower and vacuum pump stops to and be used for acquireing measure the temperature value, humidity value and the atmospheric pressure value of box.
By arranging the insulator clamping assembly, the insulator hardware can be stably clamped and electrically connected; the process that temperature, humidity and atmospheric pressure change gradually in the natural environment can be simulated through standard environment simulation subassembly to the better laminating actual environment carries out resistance measurement to the insulator, improves measuring result's accuracy.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an insulator resistance measurement apparatus according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of the insulator resistance measuring device provided in the embodiment of the present application after being connected to an insulation group fitting;
fig. 3 is an electrical connection diagram of an insulator resistance measuring device according to an embodiment of the present disclosure;
fig. 4 is a schematic view of a lower clamping block connection structure of an insulator resistance measuring device according to an embodiment of the present disclosure;
fig. 5 is a schematic external structural diagram of an insulator resistance measurement apparatus according to an embodiment of the present application;
in the figure: 1. a measuring box body; 11. a door; 21. a left pneumatic claw; 22. a right pneumatic claw; 231. an upper clamping block; 232. a lower clamping block; 24. a left conductive line; 25. a left measurement terminal; 26. a right lead; 27. a right measurement terminal; 28. an insulator resistance tester; 29. a conductive metal block; 30. a cable seal; 31. an electric linear guide rail; 41. an electrical heating plate; 42. a refrigeration plate; 43. a sprayer; 44. a vacuum pump; 45. a temperature sensor; 46. a humidity sensor; 47. an air pressure sensor; 48. a PLC controller; 49. an industrial personal computer; 51. a left proximity switch; 52. a right proximity switch; 53. a first solenoid valve; 54. a second solenoid valve.
Detailed Description
The technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are some, but not all embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of protection claimed herein.
In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected" and "connected" should be interpreted broadly, and may be, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements. Specific meanings of the above terms in the embodiments of the present application can be understood as specific cases by those of ordinary skill in the art.
Referring to fig. 1 and fig. 2, an insulator resistance measuring device provided in an embodiment of the present application includes: the device comprises a measuring box body 1, an insulator clamping assembly and a standard environment simulation assembly; the insulator clamping assembly is used for clamping and electrically connecting the insulator hardware fitting.
The standard environment simulation assembly comprises: an electric heating plate 41, a refrigerating sheet 42, a sprayer 43, a vacuum pump 44, a temperature sensor 45, a humidity sensor 46, an air pressure sensor 47 and an industrial personal computer 49. The electric heating plate 41 and the refrigerating sheet 42 are both arranged on the bottom surface in the measuring box body 1; the sprayer 43 is arranged on the inner top surface of the measuring box body 1; the vacuum pump 44 is communicated with the inside of the measuring box body 1 through a pipeline; the temperature sensor 45, the humidity sensor 46 and the air pressure sensor 47 are respectively arranged on the inner wall of the measuring box body 1; the industrial personal computer 49 is respectively in communication connection with the electric heating plate 41, the refrigerating sheet 42, the sprayer 43, the vacuum pump 44, the temperature sensor 45, the humidity sensor 46 and the air pressure sensor 47, is used for controlling the starting and stopping of the electric heating plate 41, the refrigerating sheet 42, the sprayer 43 and the vacuum pump 44, and is used for acquiring the temperature value, the humidity value and the air pressure value of the measuring box body 1.
Wherein the electric heating plate 41 is used to heat the measurement tank 1, thereby raising the temperature inside the measurement tank 1. The cooling fins 42 are used for cooling, thereby lowering the temperature inside the measuring chamber 1. The sprayer 43 is used to spray water mist, thereby increasing the humidity inside the measurement tank 1. The vacuum pump 44 is used for pumping and transporting air, thereby adjusting the air pressure in the measurement chamber 1. Accordingly, when the humidity in the measurement box 1 needs to be reduced, the humidity reduction and ventilation can be performed by the vacuum pump 44 in cooperation with the refrigeration sheet 42.
It should be noted that, referring to fig. 3, the standard environment simulation component may further include a PLC controller 48. The electric heating plate 41, the refrigerating sheet 42, the sprayer 43, the vacuum pump 44, the temperature sensor 45, the humidity sensor 46 and the air pressure sensor 47 are all electrically connected with a PLC (programmable logic controller) 48, and are connected with an industrial personal computer 49 through the PLC 48.
The standard environment simulation assembly can adjust and measure the temperature value, the humidity value and the air pressure value in the box body 1 through the industrial personal computer 49, so that the natural environment can be simulated more accurately, and the measurement of the insulator in various environments is facilitated.
In a more specific embodiment, referring to fig. 1 and 2, the insulator clamping assembly includes: the device comprises a left pneumatic claw 21, a right pneumatic claw 22, a left lead 24, a left measuring terminal 25, a right lead 26, a right measuring terminal 27 and an insulator resistance tester 28; the left air claw 21 and the right air claw 22 are respectively arranged at two sides in the measuring box body 1; the left pneumatic claw 21 and the right pneumatic claw 22 are both provided with an upper clamping block 231 and a lower clamping block 232 which can slide oppositely; the left measuring terminal 25 is electrically connected with the upper clamping block 231 and the lower clamping block 232 on the left air claw 21 through the left lead 24; the right measuring terminal 27 is electrically connected with the upper clamping block 231 and the lower clamping block 232 on the right air claw 22 through a right lead 26; two measuring pins of the insulator resistance tester 28 are respectively connected to the left measuring terminal 25 and the right measuring terminal 27.
When the insulator resistance tester 28 is conventionally used for measuring the insulator, two measuring needles are respectively lapped on hardware fittings at two ends of the insulator, and the lapping mode is unreliable, so that the measuring error is larger. In this embodiment, the insulator hardware can be electrically connected through the upper clamping block 231 and the lower clamping block 232, and connected to the insulator resistance tester 28 through the left wire 24 and the right wire 26. Meanwhile, the upper clamping block 231 and the lower clamping block 232 can slide oppositely, can be adapted to insulator fittings of different sizes and can be better clamped tightly, the left wire 24 and the right wire 26 can be ensured to be in full contact with the fitting of the insulator, and measurement errors are reduced.
As a further improved embodiment, the insulator clamping assembly further comprises: an electric linear guide 31; the electric linear guide rail 31 is horizontally arranged on the inner wall of the measuring box body 1; the right pneumatic claw 22 is slidably disposed on the electric linear guide 31 along the electric linear guide 31.
Wherein, electronic linear guide 31 can connect industrial computer 49 through PLC controller 48 for the staff can control right gas claw 22 through industrial computer 49 and slide, realizes carrying out the centre gripping to the insulator of different length and measures, improves the suitability.
Further, the insulator gripping assembly may also include a plurality of cable seals 30; the air pipes of the left air claw 21 and the right air claw 22 are hermetically connected with the measuring box body 1 through a cable sealing element 30; the left lead wire 24 and the right lead wire 26 are hermetically connected with the measuring box body 1 through a cable sealing member 30.
The tightness of the measuring chamber 1 can be ensured by the cable seal 30.
In other embodiments, referring to fig. 4, one surface of the upper clamping block 231 opposite to the lower clamping block 232 may be configured as an arc-shaped clamping surface; the arc-shaped clamping surface is provided with a conductive metal block 29 which is flush with the end surface of the arc-shaped clamping surface; the conductive metal block 29 is electrically connected to the left lead 24 or the right lead 26 through a built-in lead.
When the upper clamping block 231 and the lower clamping block 232 are driven by the clamping jaws to wrap and clamp the outer surface of the insulator, the conductive metal block 29 can be in more reliable contact with an insulator hardware fitting, and measurement errors are reduced.
Further, in order to increase the contact area and further reduce the measurement error, the conductive metal blocks 29 may be provided in plurality and uniformly spaced along the end surface of the arc-shaped clamping surface.
Further, the upper clamping block 231 and the lower clamping block 232 are both made of expanded polytetrafluoroethylene.
The upper clamping block 231 and the lower clamping block 232 formed by the expanded polytetrafluoroethylene mold have good mechanical properties, certain elasticity and good insulativity. When the upper clamping block 231 and the lower clamping block 232 are driven by the clamping jaws to wrap and clamp the outer surface of the insulator, the upper clamping block 231 and the lower clamping block 232 are compressed, and the conductive metal block 29 is reliably connected with the insulator hardware fitting. The conductive metal block 29 may be a red copper block, a silver-copper alloy block, or another metal block with good conductivity, and since the resistance of the conductor is negligible relative to the resistance of the insulator, the resistance measurement of the insulator is not affected.
Further, the insulator clamping assembly further comprises a left proximity switch 51 and a right proximity switch 52; the left proximity switch 51 is arranged on the left air claw 21 and is positioned in the center between the upper clamping block 231 and the lower clamping block 232 on the left air claw 21; the right proximity switch 52 is arranged on the right air claw 22 and is positioned in the center between the upper clamping block 231 and the lower clamping block 232 on the right air claw 22; the left proximity switch 51 and the right proximity switch 52 are both in communication and electric connection with the industrial personal computer 49; the action distances of the left proximity switch 51 and the right proximity switch 52 are both 5mm.
Specifically, the industrial personal computer 49 can electrically connect the left air gripper 21 and the right air gripper 22 via the PLC controller 48, thereby controlling the gripping operation of the two. The distance between the left gas claw 21 and the right gas claw 22 and the insulator fitting can be respectively sensed through the left proximity switch 51 and the right proximity switch 52, so that the automatic control of the electric linear guide rail 31, the left gas claw 21 and the right gas claw 22 is realized.
Specifically, the electric linear guide 31 is provided with a slider capable of electrically controlling the sliding position, and the right air gripper 22 is fixedly provided on the slider.
In practical application, the industrial personal computer 49 can control the slide block position of the electric linear guide rail 31 through the PLC controller 48, so that the left end of the insulator hardware is placed on the arc-shaped clamping surface of the lower clamping block 232 of the left gas claw 21, and the right end of the insulator hardware is placed on the arc-shaped clamping surface of the lower clamping block 232 of the right gas claw 22. The PLC 48 controls the slider of the electric linear guide rail 31 to move left, when the distance between the sensing surface of the left proximity switch 51 and the left end surface of the insulator is less than 5mm, the PLC 48 controls the left air claw 21 to start through the first electromagnetic valve 53, the upper clamping block 231 and the lower clamping block 232 of the left air claw 21 clamp the left end fitting of the insulator tightly, the PLC 48 controls the slider of the electric linear guide rail 31 to continue to move left, when the distance between the sensing surface of the right proximity switch 52 and the right end surface of the insulator is less than 5mm, the PLC 48 controls the right air claw 22 to start through the second electromagnetic valve 54, and the upper clamping block 231 and the lower clamping block 232 of the right air claw 22 clamp the right end fitting of the insulator tightly.
Further, referring to fig. 5, the measurement box 1 is provided with a door 11 capable of being opened and closed; one side of the door 11 is hinged with the measuring box body 1 through a door shaft, and the other side is provided with a sealing door lock; the butt joint department all around of door 11 and measurement box 1 is provided with the seal groove, sets up waterproof sealing circle in the seal groove.
The measurement box 1 can provide a sealed test environment when the door 11 is closed through the openable door 11, and support is provided for obtaining accurate measurement data.
The application also provides an insulator resistance measuring method which is applied to any insulator resistance measuring device; the method comprises the following steps:
s1, clamping and connecting an insulator hardware fitting to be tested to an insulator clamping assembly;
specifically, after the door 11 is opened, the hardware fitting at the left end of the insulator of the model to be tested is placed at the upper clamping block 231 and the lower clamping block 232 between the clamping jaws of the left gas claw 21, the clamping jaws of the left gas claw 21 are operated to be closed, the hardware fitting at the left end of the insulator is ensured to be completely clamped between the upper clamping block 231 and the lower clamping block 232, and the clamping of the hardware fitting at the left end of the insulator is completed;
by moving the sliding block of the electric linear guide rail 31, the fitting at the right end of the insulator is completely positioned at the upper clamping block 231 and the lower clamping block 232 between the clamping jaws of the right pneumatic jaw 22, the clamping jaws of the right pneumatic jaw 22 are operated to be closed, the fitting at the right end of the insulator is completely clamped between the upper clamping block 231 and the lower clamping block 232, clamping of the fitting at the right end of the insulator is completed, and then the door 11 is closed.
S2, adjusting environmental parameters through an industrial personal computer 49 according to a preset rule, wherein the environmental parameters comprise a temperature value, a humidity value and an air pressure value, and the preset rule is as follows: the temperature value in the adjusting and measuring box body 1 is adjusted to be changed between minus 40 ℃ and 70 ℃ every 10 ℃ as a change unit, the humidity value in the adjusting and measuring box body 1 is adjusted to be changed between 20% and 90% every 10% of the difference as a change unit, the adjusting air pressure value is changed between 100Pa, 0.1MPa and 0.2Ma, and the temperature value, the humidity value and the air pressure value which are set once every change correspond to one environmental parameter.
And S3, starting the insulator resistance tester 28 to measure the resistance value of the insulator every time one environmental parameter is set, and recording the measurement result to form an environmental resistance value corresponding table of the insulator to be measured.
Specifically, each time an environmental parameter is set, the insulator resistance tester 28 is turned on to measure the resistance of the insulator to be tested, and the resistance is recorded. The measuring voltage can be 5000VDC +/-5%, and an environment resistance value corresponding table of the insulator to be measured is formed. The format of the table may be as shown in tables 1 to 3; in the table, the temperature value, the humidity value and the environmental resistance value are represented by temperature, humidity and resistance value, respectively.
TABLE 1
TABLE 2
TABLE 3
For the insulator with the specified specification, the device and the method provided by the scheme can realize the measurement of the accurate resistance under various environmental parameters and record the measurement into a table. Make electrical engineer when carrying out the insulator lectotype, can carry out the reference of standard data, make it when carrying out circuit design, more accurate, avoid using the too big or undersize insulator of resistance, the too big insulator of resistance inevitably leads to the volume increase, occupies industry structural design space, and the insulator of resistance undersize inevitably leads to electrical safety to obtain the guarantee.
Although the present invention has been described in detail with reference to examples, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention.
Claims (10)
1. An insulator resistance measuring device, comprising: the device comprises a measurement box body (1), an insulator clamping assembly and a standard environment simulation assembly;
the insulator clamping assembly is used for clamping and electrically connecting an insulator hardware fitting;
the standard environment simulation component comprises: the refrigerator comprises an electric heating plate (41), a refrigerating sheet (42), a sprayer (43), a vacuum pump (44), a temperature sensor (45), a humidity sensor (46), an air pressure sensor (47) and an industrial personal computer (49);
the electric heating plate (41) and the refrigerating sheet (42) are both arranged on the bottom surface in the measuring box body (1) and are used for adjusting the temperature in the measuring box body (1);
the sprayer (43) is arranged on the inner top surface of the measuring box body (1);
the vacuum pump (44) is communicated with the inside of the measuring box body (1) through a pipeline;
the temperature sensor (45), the humidity sensor (46) and the air pressure sensor (47) are respectively arranged on the inner wall of the measuring box body (1);
industrial computer (49) respectively with electric heating plate (41), refrigeration piece (42), spray thrower (43), vacuum pump (44), temperature sensor (45), humidity transducer (46) and baroceptor (47) communication connection for control the start-stop of electric heating plate (41), refrigeration piece (42), spray thrower (43) and vacuum pump (44) and be used for obtaining measure temperature value, humidity value and the atmospheric pressure value of box (1).
2. The insulator resistance measurement device of claim 1, wherein the insulator clamping assembly comprises: the device comprises a left pneumatic claw (21), a right pneumatic claw (22), a left lead (24), a left measuring terminal (25), a right lead (26), a right measuring terminal (27) and an insulator resistance tester (28);
the left pneumatic claw (21) and the right pneumatic claw (22) are respectively arranged on two sides of the inside of the measuring box body (1);
the left pneumatic claw (21) and the right pneumatic claw (22) are respectively provided with an upper clamping block (231) and a lower clamping block (232) which can slide oppositely;
the left measuring terminal (25) is electrically connected with an upper clamping block (231) and a lower clamping block (232) on the left pneumatic claw (21) through a left lead (24);
the right measuring terminal (27) is electrically connected with an upper clamping block (231) and a lower clamping block (232) on the right air claw (22) through a right lead (26);
and two measuring needles of the insulator resistance tester (28) are respectively connected into the left measuring terminal (25) and the right measuring terminal (27).
3. The insulator resistance measurement device of claim 2, wherein the insulator clamping assembly further comprises: an electric linear guide (31);
the electric linear guide rail (31) is horizontally arranged on the inner wall of the measuring box body (1);
the right pneumatic claw (22) is slidably arranged on the electric linear guide rail (31) along the electric linear guide rail (31).
4. The insulator resistance measurement device according to claim 2, wherein the insulator gripping assembly further comprises a plurality of cable seals (30);
the air pipes of the left air claw (21) and the right air claw (22) are hermetically connected with the measuring box body (1) through the cable sealing element (30);
the left lead (24) and the right lead (26) are connected with the measuring box body (1) in a sealing mode through the cable sealing piece (30).
5. The insulator resistance measuring device according to claim 2, wherein the opposite surfaces of the upper clamping block (231) and the lower clamping block (232) are arc-shaped clamping surfaces;
a conductive metal block (29) which is flush with the end face of the arc-shaped clamping face is arranged on the arc-shaped clamping face;
the conductive metal block (29) is electrically connected with the left lead (24) or the right lead (26) through a built-in lead.
6. An insulator resistance measuring device according to claim 5, wherein the conductive metal block (29) comprises a plurality of blocks and is arranged at regular intervals along the end face of the arc-shaped clamping face.
7. An insulator resistance measuring device according to claim 5, characterized in that the upper clamping block (231) and the lower clamping block (232) are both made of expanded polytetrafluoroethylene.
8. An insulator resistance measuring device according to claim 2, wherein the insulator clamping assembly further comprises a left proximity switch (51) and a right proximity switch (52);
the left proximity switch (51) is arranged on the left air claw (21) and is positioned in the center between an upper clamping block (231) and a lower clamping block (232) on the left air claw (21);
the right proximity switch (52) is arranged on the right pneumatic claw (22) and is positioned in the center between an upper clamping block (231) and a lower clamping block (232) on the right pneumatic claw (22);
the left proximity switch (51) and the right proximity switch (52) are both in communication and electric connection with the industrial personal computer (49);
the action distances of the left proximity switch (51) and the right proximity switch (52) are both 5mm.
9. The insulator resistance measuring device according to claim 1, wherein the measuring box (1) is provided with a door (11) that can be opened and closed;
one side of the door (11) is hinged with the measuring box body (1) through a door shaft, and the other side of the door is provided with a sealing door lock;
the butt joint department all around of door (11) with measure box (1) is provided with the seal groove, set up waterproof sealing circle in the seal groove.
10. An insulator resistance measuring method, characterized by being applied to the insulator resistance measuring apparatus according to any one of claims 1 to 9;
the method comprises the following steps:
s1, clamping and connecting an insulator hardware fitting to be tested to an insulator clamping assembly;
s2, adjusting environmental parameters according to a preset rule through an industrial personal computer (49), wherein the environmental parameters comprise a temperature value, a humidity value and an air pressure value, and the preset rule is as follows: adjusting the temperature value in the measuring box body (1) to change between minus 40 ℃ and 70 ℃ every 10 ℃ as a change unit, adjusting the humidity value in the measuring box body (1) to change between 20% and 90% by taking each difference of 10% as a change unit, adjusting the air pressure value to change between 100Pa, 0.1MPa and 0.2Ma, and setting the temperature value, the humidity value and the air pressure value to correspond to one environmental parameter every time the temperature value, the humidity value and the air pressure value are changed;
and S3, starting the insulator resistance tester (28) to measure the resistance value of the insulator every time one environmental parameter is set, and recording the measurement result to form an environmental resistance value corresponding table of the insulator to be measured.
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