CN114136496A - Portable temperature calibration device - Google Patents
Portable temperature calibration device Download PDFInfo
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- CN114136496A CN114136496A CN202111228427.3A CN202111228427A CN114136496A CN 114136496 A CN114136496 A CN 114136496A CN 202111228427 A CN202111228427 A CN 202111228427A CN 114136496 A CN114136496 A CN 114136496A
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- control unit
- temperature
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- thermostatic bath
- micro control
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K15/00—Testing or calibrating of thermometers
- G01K15/005—Calibration
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- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention relates to a portable temperature calibration device which comprises a base, a thermostatic bath, a lithium battery and a micro control unit, wherein the thermostatic bath, the lithium battery and the micro control unit are all arranged on the base; the invention has the advantages that: through constant temperature bath, lithium cell and little the control unit setting on the base to make constant temperature bath, lithium cell and little the control unit form a whole with the base, thereby simplified the structure of whole temperature calibration equipment, carry out unified power supply to temperature sensor, fan, heating resistor silk and little the control unit through the lithium cell moreover, thereby need not external power supply, thereby further reduce calibration equipment volume and weight, the carrying of the inspection personnel of being convenient for.
Description
Technical Field
The invention relates to a portable temperature calibration device.
Background
The portable temperature calibrator is widely applied to the departments of industrial and mining enterprises, power transformers, war industry, metering and the like, mainly calibrates temperature elements (a thermocouple, a platinum resistor and a thermometer), a temperature transmitter (a sensor), a temperature switch and a temperature instrument, adopts high-brightness backlight large-screen display, is simple and convenient to operate, firm in structure, small, exquisite, light, compact, economical and applicable, and can be used in instrument workshops, metering rooms and transformer temperature measuring devices, while in the calibrator of the existing oil-immersed transformer temperature measuring device, a transformer temperature measuring probe is positioned at the top of a transformer, the free end of the transformer generates displacement due to the change of the curvature of an elastic element in the thermometer positioned on the side surface of the transformer caused by the saturated steam pressure of closed gas evaporation liquid in the thermometer bulb, and then the free end generates displacement and is amplified by a gear to realize the temperature measurement and the node action under the set temperature, taking a common 220kV transformer as an example, the height is about 4 meters, a checker needs to move equipment such as checking equipment, a power box and the like to a platform at the top of a transformer through a single escalator to check the temperature measuring device, meanwhile, the checker needs to observe the change of the thermometer on the side where the thermometer of the transformer is located and observe the change of the main transformer temperature of a monitoring picture in a monitoring room, meanwhile, the curve check needs to be completed through multiple points, the checker needs to repeatedly climb the main transformer to set the checking furnace, meanwhile, according to Q/GDW 10440-2018 & lt on-site calibration standard of the temperature measuring device of the oil-immersed transformer, the temperature rise rate is required to be controlled to be 0.8 ℃/min-1.0 ℃/min, the maximum setting action switch node of the temperature measuring device is calculated at 105 ℃, 85 minutes to 106 minutes are needed, most of power transformers are outdoor equipment, and the checker needs to set the thermometer at least 3 times according to the curve characteristics of the power transformer, and comparing the temperature calibrator window, the main transformer thermometer data and the background monitoring picture data.
Disclosure of Invention
The invention aims to provide a portable temperature calibration device, which can reduce the volume and weight of the whole temperature calibration device and is convenient for operators to carry.
In order to solve the technical problems, the invention is realized by the following technical scheme: a portable temperature calibration device is applied to a temperature measuring device of an oil-immersed transformer, the temperature measuring device of the oil-immersed transformer comprises a thermal bulb and a thermometer connected to the thermal bulb, the temperature calibration device comprises a base, a thermostatic bath, a lithium battery and a micro control unit, the thermostatic bath, the lithium battery and the micro control unit are all arranged on the base, a fixing column for installing the thermal bulb is arranged in the thermostatic bath, transformer oil is arranged between the fixing column and the thermostatic bath, a flow channel is arranged on the fixing column, a temperature sensor connected with the micro control unit is arranged on the inner side wall of the thermostatic bath, a fan connected with the micro control unit is arranged at the bottom end of the fixing column, a heating resistance wire connected with the micro control unit is arranged on the outer side wall of the fixing column, the temperature sensor, the fan, the heating resistance wire and the micro control unit are all connected with the lithium battery, and the micro control unit controls the opening of the fan or the heating resistance wire according to signals of the temperature sensor, the micro control unit is connected with a short message sending module, and temperature information is sent to an operator through the short message sending module.
Preferably, the base is provided with a groove, the groove is internally provided with an installation sleeve for installing the thermostatic bath, the groove is provided with a circuit board, and the lithium battery and the micro control unit are both arranged on the circuit board.
Preferably, the circuit board comprises a first MOS tube and a second MOS tube, a gate of the first MOS tube is connected to the micro control unit, a drain of the first MOS tube is connected to an anode of the power supply through a first resistor, a source of the first MOS tube is connected to the ground terminal, a gate of the second MOS tube is connected to the micro control unit, a drain of the second MOS tube is connected to the anode of the power supply through a second resistor, a source of the first MOS tube is connected to the ground terminal, one end of the heating resistance wire is connected to the drain of the first MOS tube, the other end of the heating resistance wire is connected to the anode of the power supply, one end of the fan is connected to the drain of the second MOS tube, the other end of the fan is connected to the anode of the power supply, and the thermostatic bath is connected to the ground terminal.
Preferably, the base is a square base, and four corners of the base are provided with magnets.
Preferably, the outer side wall of the base is provided with a carrying groove or/and a handle.
Preferably, the fixing column comprises a section of mounting section for mounting the thermal bulb and a section of fixing section for fixing the fan, the fixing section is arranged at the bottom end of the mounting section, and the fixing column is fixedly connected in the thermostatic bath through the fixing section.
Preferably, the fixing section is integrally formed on the mounting section, and the diameter of the mounting section is larger than that of the fixing section.
Preferably, the top end of the mounting section is provided with a vertical through hole for mounting the thermal bulb, and the flow channel is a through hole which is arranged on the mounting section and is communicated with the vertical through hole.
Preferably, the outer side wall of the mounting section is provided with a spiral groove for winding the heating resistance wire.
Preferably, the top end of the thermostatic bath is provided with a sealing plug, and the sealing plug is detachably mounted in the thermostatic bath.
In conclusion, the invention has the advantages that: the structure of the whole temperature checking device is simplified by arranging the thermostatic bath, the lithium battery and the micro control unit on the base, the temperature sensor, the fan, the heating resistance wire and the micro control unit are uniformly powered by the lithium battery, an external power supply is not needed, the size and the weight of the checking device are further reduced, the carrying of inspectors is convenient, secondly, the temperature signal in the thermostatic bath is collected by the temperature sensor in real time, the micro control unit controls the opening of the fan or the heating resistance wire according to the temperature signal after receiving the temperature signal, and the fan and the heating resistance wire are arranged on a fixed column, so that the heating efficiency and the heat dissipation efficiency can be improved, the working efficiency is further improved, and the temperature rise efficiency and the temperature accuracy can be well controlled, and the thermostatic bath can keep the constant temperature state in the thermostatic bath, makes the check-up personnel can look over the time of thermometer and backstage monitoring data, and inform personnel in the transformer substation with the form of SMS through SMS sending module with temperature information, does not have the network security risk, also avoids personnel to wait simultaneously, finally, receives the check-up data through little the control unit to realized that overhaul data to one by one compares, realized the state evaluation of main temperature measuring device that becomes, carry out full life cycle management.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic structural diagram of a portable temperature calibration device according to the present invention;
FIG. 2 is a schematic view of a portable temperature verification device according to the present invention;
FIG. 3 is a schematic circuit diagram of the portable temperature verification device of the present invention;
FIG. 4 is a schematic view showing the structure of a thermostatic bath according to the present invention;
fig. 5 is a schematic structural view of the base of the present invention.
Reference numerals:
1 thermostatic bath, 11 sealing plugs, 2 lithium batteries, 3 micro control units, 31 short message sending modules, 4 fixing columns, 40 flow channels, 41 installation sections, 42 fixing sections, 43 vertical through holes, 44 spiral grooves, 5 transformer oil, 6 temperature sensors, 7 fans, 8 heating resistance wires, 9 bases, 91 grooves, 92 installation sleeves, 93 circuit boards, 94 first MOS tubes, 95 second MOS tubes, 96 first resistors, 97 second resistors, 98 magnets, 99 handles, 10 temperature bulbs and 100 thermometers.
Detailed Description
As shown in fig. 1, 2, 3, 4 and 5, a portable temperature calibration device is applied to a temperature measurement device of an oil-immersed transformer, the temperature measurement device of the oil-immersed transformer comprises a thermal bulb 10 and a thermometer 100 connected to the thermal bulb 10, the temperature measurement device comprises a base 9, a thermostatic bath 1, a lithium battery 2 and a micro control unit 3, the thermostatic bath 1, the lithium battery 2 and the micro control unit 3 are all arranged on the base 9, a fixed column 4 for installing the thermal bulb 10 is arranged in the thermostatic bath 1, transformer oil 5 is arranged between the fixed column 4 and the thermostatic bath 1, a flow channel 40 is arranged on the fixed column 4, a temperature sensor 6 connected with the micro control unit 3 is arranged on the inner side wall of the thermostatic bath 1, a fan 7 connected with the micro control unit 3 is arranged at the bottom end of the fixed column 4, a heating resistance wire 8 connected with the micro control unit 3 is arranged on the outer side wall of the fixed column 4, the temperature sensor 6, the fan 7, the heating resistance wire 8 and the micro control unit 3 are all connected with the lithium battery 2, the micro control unit 3 controls the fan 7 or the heating resistance wire 8 to be opened according to signals of the temperature sensor 6, the micro control unit 3 is connected with a short message sending module 31, and temperature information is sent to an operator through the short message sending module 31.
Through the thermostatic bath, the lithium battery and the micro control unit are arranged on the base, so that the thermostatic bath, the lithium battery and the micro control unit form a whole with the base, thereby simplifying the structure of the whole temperature checking device, and the temperature sensor 6, the fan 7, the heating resistance wire 8 and the micro control unit 3 are uniformly powered through the lithium battery 2, thereby needing no external power supply, further reducing the volume and the weight of the checking device, being convenient for inspectors to carry, secondly, the temperature signal in the thermostatic bath 1 is collected through the temperature sensor 6 in real time, the micro control unit 3 controls the opening of the fan 7 or the heating resistance wire 8 according to the temperature signal after receiving the temperature signal, and the fan 7 and the heating resistance wire 8 are both arranged on the fixed column 4, thereby improving the heating efficiency and the heat dissipation efficiency, further improving the working efficiency, and further controlling the temperature raising efficiency and the temperature accuracy, and the thermostatic bath 1 can keep the constant temperature state in the thermostatic bath 1, make the check-up personnel can look over the time of thermometer 100 and backstage monitoring data, and inform personnel in the transformer substation with the form of SMS through SMS sending module 31 with temperature information, there is not the network security risk, also avoid personnel to wait simultaneously, finally, receive the check-up data through little the control unit 3, thereby realized the comparison of overhaul data one by one, realize the state evaluation of main temperature measuring device that becomes, carry out the management of full life cycle.
The circuit board 93 comprises a first MOS transistor 94 and a second MOS transistor 95, the gate of the first MOS transistor 94 is connected with the micro control unit 3, the drain of the first MOS transistor 94 is connected with the positive electrode of the power supply through a first resistor 96, the source of the first MOS transistor 94 is connected with the ground terminal, the gate of the second MOS transistor 95 is connected with the micro control unit 3, the drain of the second MOS transistor 95 is connected with the positive electrode of the power supply through a second resistor 97, the source of the first MOS transistor 94 is connected with the ground terminal, one end of the heating resistance wire 8 is connected with the drain of the first MOS transistor 94, the other end of the heating resistance wire 8 is connected with the positive electrode of the power supply, one end of the fan 7 is connected with the drain of the second MOS transistor 95, the other end of the fan 7 is connected with the positive electrode of the power supply, and the thermostatic bath 1 is connected with the ground terminal, so that the fan 7 and the heating resistance wire 8 can be controlled independently, thereby ensuring that the fan 7 and the heating resistance wire 8 work independently.
The base 9 is a square base, the magnets 98 are arranged on four corners of the base 9, the base 9 is arranged to be the square base, the arrangement of the magnets 98 can ensure that when the digital portable temperature calibration device is used for calibration, the fixing quality of the base 9 can be ensured, the base 9 is arranged into a square base, the stability of the base 9 can be ensured, the stability of the thermostatic bath 1, the lithium battery 2 and the micro control unit 3 on the base 9 can be ensured, the outer side wall of the base is provided with a carrying groove or/and a handle 99, which is convenient for carrying the base, moreover, different carrying modes can be set according to different operators, the practical performance is good, the structure of the handle 99 is preferentially adopted in the embodiment, the structure of the base can not be changed by the handle, the strength of the base is improved, and the handle can also be provided with an anti-skid structure, such as an anti-skid mat, thereby improving the quality during carrying.
The fixing column 4 comprises a mounting section 41 for mounting the thermal bulb 10 and a fixing section 42 for fixing the fan 7, the fixing section 42 is arranged at the bottom end of the mounting section 41, the fixing column 4 is fixedly connected in the thermostatic bath 1 through the fixing section 42, the fixing column 4 is arranged into the mounting section 41 and the fixing section 42, the thermal bulb 10 and the fan 7 can be independently mounted on the fixing column 4, the fixing section 42 can fix the fixing column 4 in the thermostatic bath 1, the fixing section 42 in the embodiment can be fixed in the thermostatic bath 1 through threads or buckles or welding, the fixing quality of the fixing column 4 is improved, the fixing section 42 is integrally formed on the mounting section 41, the diameter of the mounting section 41 is larger than that of the fixing section 42, the mounting process of the fixing section 42 between the mounting section 41 can be simplified, the mounting strength of the whole fixing column 4 is improved, and the diameter of the mounting section 41 is larger than that of the fixing section 42, can improve the radiating effect of fan 7 after the installation to canned paragraph 42, guarantee canned paragraph 42's even heat dissipation, the top of erection section 41 is equipped with the vertical through-hole 43 of installation thermal bulb 10, runner passageway 40 is for setting up the through-hole that communicates with vertical through-hole 43 on erection section 41, and vertical through-hole 43 can realize that the thermal bulb 10 is quick to be installed on erection section 41, and the setting of through-hole can realize transformer oil 5's quick flow, has improved transformer oil 5's mobile quality.
Be equipped with the helicla flute 44 of winding heating resistor silk 8 on the lateral wall of erection section 41, can improve the fixed quality of heating resistor silk 8, heating resistor silk 8 is for the relative slip of erection section 41 when reducing the installation, has guaranteed the heating quality of heating resistor silk 8 to erection section 41, the top of thermostatic bath 1 is equipped with sealing plug 11, sealing plug 11 detachable installs in thermostatic bath 1, realizes the airtight of thermostatic bath 1 to be convenient for the save of transformer oil 5, prevent the seepage, set sealing plug 11 and thermostatic bath 1 into demountable installation's structure, make things convenient for oil-immersed transformer temperature measuring device's installation when the check-up, sealing plug 11 and thermostatic bath 1 accessible threaded connection in this embodiment also can adopt other screw connections, and threaded connection installation dismantlement is convenient, connects reliably.
Be equipped with recess 91 on the base 9, be equipped with the installation cover 92 of installation thermostatic bath 1 in the recess 91, be equipped with circuit board 93 on the recess 91, lithium cell 2 and little the control unit 3 all set up on circuit board 93, and installation cover 92 can realize that 1 quick installation of thermostatic bath is on base 9, and installation cover 92 sets up in recess 91, can reduce rocking of installation cover 92, improves the fixed quality of thermostatic bath 1, and the setting of circuit board 93 can realize that lithium cell 2 and little the control unit 3 form a whole, has simplified whole installation space on base 9 to whole base 9's volume has been reduced.
The above description is only an embodiment of the present invention, but the technical features of the present invention are not limited thereto, and any changes or modifications within the technical field of the present invention by those skilled in the art are covered by the claims of the present invention.
Claims (10)
1. The utility model provides a portable temperature calibration device, uses on oil-immersed transformer temperature measuring device, oil-immersed transformer temperature measuring device includes the thermometer on the thermal bulb and connects its characterized in that: comprises a base, a thermostatic bath, a lithium battery and a micro-control unit, wherein the thermostatic bath, the lithium battery and the micro-control unit are all arranged on the base, a fixed column for installing a thermal bulb is arranged in the thermostatic bath, transformer oil is arranged between the fixed column and the thermostatic bath, a flow channel is arranged on the fixed column, a temperature sensor of the micro control unit is arranged on the inner side wall of the thermostatic bath, the bottom end of the fixed column is provided with a fan connected with the micro control unit, the outer side wall of the fixed column is provided with a heating resistance wire connected with the micro control unit, the temperature sensor, the fan, the heating resistance wire and the micro control unit are all connected with the lithium battery, the micro control unit controls the opening of the fan or the heating resistance wire according to the signal of the temperature sensor, the micro control unit is connected with a short message sending module, and temperature information is sent to an operator through the short message sending module.
2. A portable temperature verifier device according to claim 1, further comprising: the base is provided with a groove, an installation sleeve for installing the constant temperature groove is arranged in the groove, the groove is provided with a circuit board, and the lithium battery and the micro control unit are arranged on the circuit board.
3. A portable temperature verifier device according to claim 2, further comprising: the circuit board comprises a first MOS tube and a second MOS tube, the grid electrode of the first MOS tube is connected with the micro control unit, the drain electrode of the first MOS tube is connected with the positive electrode of a power supply through a first resistor, the source electrode of the first MOS tube is connected with the grounding terminal, the grid electrode of the second MOS tube is connected with the micro control unit, the drain electrode of the second MOS tube is connected with the positive electrode of the power supply through a second resistor, the source electrode of the first MOS tube is connected with the grounding terminal, one end of the heating resistance wire is connected with the drain electrode of the first MOS tube, the other end of the heating resistance wire is connected with the positive electrode of the power supply, one end of the fan is connected with the drain electrode of the second MOS tube, the other end of the fan is connected with the positive electrode of the power supply, and the constant temperature bath is connected with the grounding terminal.
4. A portable temperature verifier device according to claim 1, further comprising: the base is a square base, and magnets are arranged on four corners of the base.
5. A portable temperature verifier device according to claim 1, further comprising: and the outer side wall of the base is provided with a carrying groove or/and a handle.
6. A portable temperature verifier device according to any one of claims 1 to 5, wherein: the fixed column comprises an installation section for installing the thermal bulb and a fixed section for fixing the fan, the fixed section is arranged at the bottom end of the installation section, and the fixed column is fixedly connected in the thermostatic bath through the fixed section.
7. A portable temperature verifier device according to claim 6, further comprising: the fixed section is integrally formed on the mounting section, and the diameter of the mounting section is larger than that of the fixed section.
8. A portable temperature verifier device according to claim 7, further comprising: the top end of the mounting section is provided with a vertical through hole for mounting the thermal bulb, and the flow channel is a through hole which is arranged on the mounting section and is communicated with the vertical through hole.
9. A portable temperature verifier device according to claim 6, further comprising: and a spiral groove for winding the heating resistance wire is arranged on the outer side wall of the mounting section.
10. A portable temperature verifier device according to claim 6, further comprising: the top of the thermostatic bath is provided with a sealing plug, and the sealing plug is detachably arranged in the thermostatic bath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111228427.3A CN114136496A (en) | 2021-10-21 | 2021-10-21 | Portable temperature calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111228427.3A CN114136496A (en) | 2021-10-21 | 2021-10-21 | Portable temperature calibration device |
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| Publication Number | Publication Date |
|---|---|
| CN114136496A true CN114136496A (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111228427.3A Pending CN114136496A (en) | 2021-10-21 | 2021-10-21 | Portable temperature calibration device |
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| CN (1) | CN114136496A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203745105U (en) * | 2014-03-03 | 2014-07-30 | 国家电网公司 | Calibrator used for transformer oil thermometer |
| CN204758168U (en) * | 2015-04-11 | 2015-11-11 | 国家电网公司 | Transformer temperature calibration equipment |
| CN107687911A (en) * | 2017-09-26 | 2018-02-13 | 福州大学 | A kind of Thermal Meter intelligence calibration system and method |
| CN108981967A (en) * | 2018-05-25 | 2018-12-11 | 江苏方天电力技术有限公司 | It is a kind of based on the on-site test of Internet of Things temperature standard device |
| CN111813082A (en) * | 2020-07-08 | 2020-10-23 | 江苏核电有限公司 | Probe heating type transformer winding temperature controller calibration device and method |
| CN211741904U (en) * | 2020-04-29 | 2020-10-23 | 宁夏送变电工程有限公司 | Transformer oil temperature detection tester |
| CN214149640U (en) * | 2021-02-19 | 2021-09-07 | 国网湖南省电力有限公司 | On-site calibration device for transformer oil temperature meter |
-
2021
- 2021-10-21 CN CN202111228427.3A patent/CN114136496A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203745105U (en) * | 2014-03-03 | 2014-07-30 | 国家电网公司 | Calibrator used for transformer oil thermometer |
| CN204758168U (en) * | 2015-04-11 | 2015-11-11 | 国家电网公司 | Transformer temperature calibration equipment |
| CN107687911A (en) * | 2017-09-26 | 2018-02-13 | 福州大学 | A kind of Thermal Meter intelligence calibration system and method |
| CN108981967A (en) * | 2018-05-25 | 2018-12-11 | 江苏方天电力技术有限公司 | It is a kind of based on the on-site test of Internet of Things temperature standard device |
| CN211741904U (en) * | 2020-04-29 | 2020-10-23 | 宁夏送变电工程有限公司 | Transformer oil temperature detection tester |
| CN111813082A (en) * | 2020-07-08 | 2020-10-23 | 江苏核电有限公司 | Probe heating type transformer winding temperature controller calibration device and method |
| CN214149640U (en) * | 2021-02-19 | 2021-09-07 | 国网湖南省电力有限公司 | On-site calibration device for transformer oil temperature meter |
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