CN112363550A - Instrument heat preservation device for electrical test and use method thereof - Google Patents
Instrument heat preservation device for electrical test and use method thereof Download PDFInfo
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- CN112363550A CN112363550A CN202011244131.6A CN202011244131A CN112363550A CN 112363550 A CN112363550 A CN 112363550A CN 202011244131 A CN202011244131 A CN 202011244131A CN 112363550 A CN112363550 A CN 112363550A
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- temperature
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/44—Modifications of instruments for temperature compensation
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention relates to an instrument heat preservation device used in an electrical test and a using method thereof, belonging to the technical field of electrical test auxiliary devices; comprises a heat preservation cover body, wherein a temperature control assembly is arranged in the heat preservation cover body; an operation window and a key window are arranged on one side, facing the worker, of the heat insulation cover body, the key window is tightly attached to an operation panel of the temperature control assembly, an electric wire through hole is further formed in the heat insulation cover body, and soft rubber transparent sealing materials are adhered to the inner walls of the operation window and the electric wire through hole; the temperature control assembly comprises a temperature control box body, a heating device, a temperature display, a control module and a temperature collector are arranged in the temperature control box body, the heating device, the temperature display and the temperature collector are all electrically connected with the control module, the temperature collector is used for collecting temperature signals inside the heat preservation cover body, the temperature signals are compared and judged with internal set values in the control module, and finally the heating device is controlled to be opened and closed according to comparison and judgment results. The invention is simple in operation and convenient in carrying.
Description
Technical Field
The invention belongs to the technical field of electrical test auxiliary devices, and particularly relates to an instrument heat preservation device and a using method thereof.
Background
The electrical test has a certain requirement on the working environment temperature of the instrument, which is in the range of +5 ℃ to +40 ℃, otherwise the sensitivity of the instrument cannot be ensured, the accuracy of the test result is affected, and the regulation requires that the test environment temperature is 25 ℃, otherwise the temperature conversion is required. At present, the average environmental temperature of 10 months to 3 months in the next year in the Changchun region is lower than +5 ℃, and no special heating device is arranged for providing the environmental temperature required by the work for the instrument during the outdoor electrical test, so that the abnormality of the test instrument is easily caused in the low-temperature environment.
Statistics is carried out on the phenomenon that the field test instrument is abnormal due to too low temperature in the period from 10 months in 2018 to 1 month in 2019, and the result is shown in table 1.
TABLE 1 statistical table of abnormal phenomena of test instrument due to over-low ambient temperature
As can be seen from Table 1, the test instrument can be subjected to abnormal conditions such as screen flashing, screen messy codes, test interruption and even incapability of starting in a low-temperature environment. Aiming at the occurrence situation, the group carries out 12 field tests in each month from 9 months in 2018 to 1 month in 2019, the statistics on the abnormal phenomenon occurrence frequency of the instrument is carried out, and the statistical result is shown in a table 2.
TABLE 2 statistics of abnormal phenomena in test instruments
Disclosure of Invention
The invention aims to provide an instrument heat preservation device used in an electrical test and a using method thereof, so as to solve the technical problem that the sensitivity of an instrument is sharply reduced in a low-temperature environment.
In order to achieve the purpose, the instrument heat preservation device used in the electrical test and the using method thereof have the following specific technical scheme:
an instrument heat preservation device used in an electrical test comprises a heat preservation cover body, wherein a temperature control assembly is arranged in the heat preservation cover body;
an operation window and a key window are arranged on one side, facing a worker, of the heat insulation cover body, the key window is tightly attached to an operation panel of the temperature control assembly, an electric wire through hole is further formed in the heat insulation cover body, and soft rubber transparent sealing materials are adhered to the inner walls of the operation window and the electric wire through hole;
the temperature control assembly comprises a temperature control box body, wherein a heating device, a temperature display, a control module and a temperature collector are arranged in the temperature control box body, the heating device, the temperature display and the temperature collector are all electrically connected with the control module, the temperature collector is used for collecting temperature signals inside the heat-insulating cover body, the temperature signals and internal set values in the control module are compared and judged, and finally the heating device is controlled to be opened and closed according to comparison and judgment results.
Further, the heat preservation cover body adopts the ya keli material, the heat preservation cover body uses five blocks of ya keli boards to paste and forms.
Further, the operation window and the electric wire through hole are arranged on two opposite side surfaces of the heat preservation cover body.
Further, the heating device is an electric air heater, and the maximum power is 300W.
Further, the temperature display is a digital display.
Further, the control module adopts an 89C52 singlechip, and when the temperature pulse is lower than 20 ℃ and outputs positive voltage, and the temperature is higher than 25 ℃ and outputs negative voltage, the electric heater starts to work when the temperature is lower than 20 ℃, and stops working when the temperature is higher than 25 ℃.
Further, an illuminating device and a humidity display device are further arranged in the heat preservation cover body.
Further, the two operation windows are symmetrically arranged.
The instrument heat preservation device used in the electrical test and the using method thereof have the following advantages: the test shows that the heat preservation device can control the working environment temperature of a test instrument to be 20 +/-5 ℃ and ensure the accuracy of test data. The device intelligence temperature control part can automatically regulated ambient temperature, controls ambient temperature at 20 +/-5 ℃ through the setting. The device has complete functions, is simple to operate and is convenient to carry.
Drawings
FIG. 1 is a first schematic structural diagram of an instrument heat-insulating device for electrical tests according to the present invention.
FIG. 2 is a schematic structural diagram of an instrument heat-insulating device used in an electrical test according to the present invention.
FIG. 3 is a third schematic structural diagram of an instrument heat-insulating device for electrical tests according to the present invention.
FIG. 4 is a flow chart of a temperature control system of an instrument warmer for use in electrical testing according to the present invention.
The notation in the figure is: 1. a heat-insulating cover body; 2. a temperature control assembly; 201. a temperature control box body; 202. a heating device; 203. a temperature display; 3. operating a window; 4. a key window; 5. a wire through hole; .
Detailed Description
For better understanding of the objects, structure and functions of the present invention, an instrument thermal insulating device for electrical tests and a method for using the same according to the present invention will be described in further detail with reference to the accompanying drawings.
As shown in figures 1-4, the invention develops an instrument heat preservation device, and solves the problem that an instrument works abnormally in the winter cold test in the northeast region. The electric test has certain requirements on the temperature of the working environment of the detecting instrument, the temperature is required to be within the range of +5 ℃ to +40 ℃, otherwise, the sensitivity of the instrument cannot be ensured, and the precision of the test result is directly influenced. At present, the outdoor average ambient temperature of 10 months to 3 months in the second year in the Changchun region is lower than +5 ℃, and no special heat preservation device is provided for the outdoor test of the electrical test to provide the required ambient temperature for the test instrument, so that abnormal conditions such as screen flashing, code disorder, test interruption, starting prohibition and the like easily occur to the test instrument in a low-temperature environment.
The instrument heat preservation device successfully developed at present effectively solves the problem that a test instrument is abnormal in a low-temperature environment, and the heat preservation device can control the working environment temperature of the test instrument to be 20 +/-5 ℃ through testing, so that the accuracy of test data is ensured. The device intelligence temperature control part can automatically regulated ambient temperature, controls ambient temperature at 20 +/-5 ℃ through the setting. The device has complete functions, is simple to operate and is convenient to carry.
An instrument heat preservation device used in an electrical test comprises a heat preservation cover body 1, wherein a temperature control assembly 2 is arranged in the heat preservation cover body 1;
an operation window 3 and a key window 4 are arranged on one side, facing a worker, of the heat-insulating cover body 1, the key window 4 is tightly attached to an operation panel of the temperature control assembly 2, an electric wire through hole 5 is further formed in the heat-insulating cover body 1, soft rubber transparent sealing materials are pasted on the inner walls of the operation window 3 and the electric wire through hole 5, the contact part of the soft rubber transparent sealing materials with the operation window 3 and the electric wire through hole 5 is sticky, the rest positions are not sticky, the operation window 3 and the electric wire through hole 5 are sealed by the soft rubber transparent sealing materials, and meanwhile, the hand of the operator is not prevented from entering the operation window 3 and the electric wire penetrates out of the electric wire through hole;
In this embodiment, the temperature control assembly 2 still is provided with the button towards one side of operator, button and 89C52 singlechip electric connection, operator's accessible control button realizes the control of opening or closing temperature range and heat preservation device.
In the embodiment, the heat-insulating cover body 1 is made of acrylic materials, the acrylic materials have high strength, heat-insulating performance superior to that of glass and light weight, the Mohs hardness value is about 8-9 degrees, and the density is 1.2kg/m3The transparency is 90-94%, and the price is 78/square meter; the heat preservation cover body 1 is formed by sticking five acrylic plates.
The working principle is as follows:
aiming at the instruments in the portable electrical test, the device is firstly placed on the designated ground, then the heat preservation device is sleeved above the heat preservation device, and the temperature control component 2 is started to carry out temperature regulation.
For detecting the quality of the heat preservation cover body 1, 50 times of tensile tests are carried out, and the detection results are shown in the table 3:
TABLE 3 tensile test data
| |
1 | 2 | 3 | 4 | ... | 46 | 47 | 48 | 49 | 50 |
| Tension N | 100 | 125 | 150 | 175 | ... | 200 | 175 | 150 | 125 | 100 |
| Results | Intact | Intact | Intact | Intact | ... | Intact | Intact | Intact | Intact | Intact |
As can be seen from Table 3, the insulation cover body 1 is thrown well under the maximum tension of 200N, and meets the requirements
In the present embodiment, the operation window 3 and the wire through hole 5 are provided on both opposite side surfaces of the heat-retaining cover body 1.
In this embodiment, the heating device 202 is an electric heater, the maximum power is 300W, the electric heater is heated more uniformly in a heating mode, the temperature of the resistance wire and the point near the ceramic lamp heating device 202 is too high, and the resistance wire and the point are not suitable for heating the working environment of an electrical test instrument, so that the electric heater is selected to be heated, and the volume of the electric heater is smaller than the temperature control box body 201 with the side length of 15 cm.
In this embodiment, the temperature display 203 is a digital display, and the accuracy of the digital display is 100% and the cost is moderate.
In the embodiment, the control module adopts an 89C52 singlechip, and when the temperature pulse is lower than 20 ℃ and outputs positive voltage, and the temperature is higher than 25 ℃ and outputs negative voltage, the electric heater starts to work when the temperature is lower than 20 ℃, and stops working when the temperature is higher than 25 ℃.
In the present embodiment, an illumination device and a humidity display device are further provided in the heat insulating cover body 1.
In the present embodiment, two operation windows 3 are symmetrically disposed.
And (3) mounting and testing:
the multifunctional heat preservation device of the electrical test instrument is placed at the outdoor environment temperature of-15 ℃, the temperature in the heat preservation device is detected, and the detection result is shown in table 4:
table 4 temperature in the multifunctional heat preservation device of the electrical test instrument
| Time (min) | 0 | 3 | 6 | 9 | 12 | 15 |
| Temperature in the apparatus | 25.0 | 21.5 | 20.5 | 22.0 | 25.5 | 23.6 |
| Working state of electric heater | Stop | Stop | Heating of | Heating of | Stop | Stop |
| Time (min) | 18 | 21 | 24 | 27 | 30 | |
| Temperature in the apparatus | 21.6 | 20.8 | 21.5 | 22.4 | 25.7 | |
| Working state of electric heater | Stop | Heating of | Heating of | Heating of | Stop |
As can be seen from Table 4, the multifunctional heat preservation device of the electrical test instrument can maintain the temperature in the box at 25 +/-5 ℃ all the time in the low-temperature environment, and the target value is achieved.
During the period from 11 months to 2020 months in 2019, the device is applied to the actual field, and after three months of detection, statistics of abnormal conditions of the instrument are shown in table 5:
TABLE 5 statistics of abnormal conditions of test instruments
As can be seen from the table 5, after the multifunctional heat preservation device of the electrical test instrument is applied, the abnormal conditions of the test instrument are obviously reduced, and the problem is solved.
The multifunctional heat preservation device for the three specialized electrical test instruments of the instrument, the assay and the high voltage is counted for one month, the normal work of the test instrument reaches 100 percent, no abnormal appearance occurs, the increase field operation time caused by the abnormal test instrument is reduced, and the service life of the test instrument is prolonged.
The development of the multifunctional heat preservation device of the testing instrument improves the testing level, is beneficial to improving the safety and stability of the transformer substation equipment, maintains good social order, ensures the safety of power supply and distribution and has remarkable social and economic benefits.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (9)
1. An instrument heat preservation device used in an electrical test is characterized by comprising a heat preservation cover body (1), wherein a temperature control assembly (2) is arranged in the heat preservation cover body (1);
an operation window (3) and a key window (4) are arranged on one side, facing a worker, of the heat insulation cover body (1), the key window (4) is tightly attached to an operation panel of the temperature control assembly (2), an electric wire through hole (5) is further formed in the heat insulation cover body (1), and soft rubber transparent sealing materials are pasted on the inner walls of the operation window (3) and the electric wire through hole (5);
accuse temperature subassembly (2) are including accuse temperature box (201), set up heating device (202), temperature monitor (203), control module and temperature collector in accuse temperature box (201), heating device (202), temperature monitor (203) and temperature collector all with control module electric connection, temperature collector is used for gathering the inside temperature signal of heat preservation cover body (1) to compare the judgement to the inside set value among temperature signal and the control module, open and close according to comparison judgement result control heating device (202) at last.
2. The instrument heat preservation device used in the electrical test according to claim 1, wherein the heat preservation cover body (1) is made of acrylic material, and the heat preservation cover body (1) is formed by sticking five acrylic plates.
3. The instrument warming device for use in electrical tests according to claim 1, wherein the operation window (3) and the wire through hole (5) are provided on opposite sides of the heat-retaining cover body (1).
4. The instrument warming device for use in electrical testing of claim 1, wherein the heating device (202) is an electric heater and has a maximum power of 300W.
5. The instrument warming device for use in electrical testing of claim 1, wherein said temperature display (203) is a digital display.
6. The instrument heat preservation device used in the electrical test as claimed in claim 1, wherein the control module adopts 89C52 single chip microcomputer, when the temperature pulse is lower than 20 ℃ and outputs positive voltage, and when the temperature is higher than 25 ℃ and outputs negative voltage, the electric heater starts to work when the temperature is lower than 20 ℃, and stops working when the temperature is higher than 25 ℃.
7. The instrument heat preservation device for electrical tests as claimed in claim 2, characterized in that an illumination device and a humidity display device are further arranged in the heat preservation cover body (1).
8. The instrument warming device for use in electrical tests according to claim 1, wherein the operation windows (3) are symmetrically arranged in two.
9. Use of an incubation device for instruments in an electrical test according to any one of claims 1 to 8, characterized in that it comprises the following steps, carried out in sequence:
step S1, firstly, placing the instrument in the portable electrical test on the appointed ground;
step S2, sleeving the heat preservation device above the heat preservation device, and arranging a detection wire of the instrument in the portable electrical test through the wire through hole (5);
step S3, the temperature control component (2) is started to regulate the temperature, so that the instrument in the portable electrical test is in the temperature range of 20-25 ℃;
step S4: the tester stretches both hands into the heat preservation cover body (1) from the operation window (3) to the instrument in the portable electrical test of operation as required.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011244131.6A CN112363550A (en) | 2020-11-10 | 2020-11-10 | Instrument heat preservation device for electrical test and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011244131.6A CN112363550A (en) | 2020-11-10 | 2020-11-10 | Instrument heat preservation device for electrical test and use method thereof |
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| Publication Number | Publication Date |
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| CN112363550A true CN112363550A (en) | 2021-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011244131.6A Pending CN112363550A (en) | 2020-11-10 | 2020-11-10 | Instrument heat preservation device for electrical test and use method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113551132A (en) * | 2021-07-19 | 2021-10-26 | 国网黑龙江省电力有限公司电力科学研究院 | A prevent sunlight, constant temperature equipment for coiled cable witnessed inspections |
| CN113558449A (en) * | 2021-07-29 | 2021-10-29 | 国网黑龙江省电力有限公司电力科学研究院 | Heat preservation cover for coiled cable detection |
-
2020
- 2020-11-10 CN CN202011244131.6A patent/CN112363550A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113551132A (en) * | 2021-07-19 | 2021-10-26 | 国网黑龙江省电力有限公司电力科学研究院 | A prevent sunlight, constant temperature equipment for coiled cable witnessed inspections |
| CN113558449A (en) * | 2021-07-29 | 2021-10-29 | 国网黑龙江省电力有限公司电力科学研究院 | Heat preservation cover for coiled cable detection |
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